build(deps): bump rustix from 0.38.11 to 0.38.13 (#8249)

Bumps [rustix](https://github.com/bytecodealliance/rustix) from 0.38.11 to 0.38.13.
- [Release notes](https://github.com/bytecodealliance/rustix/releases)
- [Commits](https://github.com/bytecodealliance/rustix/compare/v0.38.11...v0.38.13)

---
updated-dependencies:
- dependency-name: rustix
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install stable toolchain
         uses: helix-editor/rust-toolchain@v1
         with:
@@ -34,7 +34,7 @@ jobs:
       HELIX_LOG_LEVEL: info
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@1.65
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@1.65
@@ -88,7 +88,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@1.65

.github/workflows/cachix.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout sources
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install nix
-      uses: cachix/install-nix-action@v20
+      uses: cachix/install-nix-action@v23
 
     - name: Authenticate with Cachix
       uses: cachix/cachix-action@v12

.github/workflows/gh-pages.yml

@@ -11,7 +11,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -103,7 +103,7 @@ jobs:
 
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Download grammars
         uses: actions/download-artifact@v3
@@ -160,7 +160,7 @@ jobs:
 
       - name: Build AppImage
         shell: bash
-        if: matrix.build == 'aarch64-linux' || matrix.build == 'x86_64-linux'
+        if: matrix.build == 'x86_64-linux'
         run: |
           # Required as of 22.x https://github.com/AppImage/AppImageKit/wiki/FUSE
           sudo add-apt-repository universe
@@ -231,7 +231,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: actions/download-artifact@v3
 
@@ -263,7 +263,7 @@ jobs:
               mv bins-$platform/hx$exe $pkgname
               chmod +x $pkgname/hx$exe
 
-              if [[ "$platform" = "aarch64-linux" || "$platform" = "x86_64-linux" ]]; then
+              if [[ "$platform" = "x86_64-linux" ]]; then
                   mv bins-$platform/helix-*.AppImage* dist/
               fi
 

.ignore

@@ -1,5 +1,2 @@
 # Things that we don't want ripgrep to search that we do want in git
 # https://github.com/BurntSushi/ripgrep/blob/master/GUIDE.md#automatic-filtering
-
-# Minified JS vendored from mdbook
-book/theme/highlight.js

CHANGELOG.md

@@ -1,3 +1,120 @@
+# 23.05 (2023-05-18)
+
+23.05 is a smaller release focusing on fixes. There were 88 contributors in this release. Thank you all!
+
+Features:
+
+- Add a config option to exclude declaration from LSP references request ([#6886](https://github.com/helix-editor/helix/pull/6886))
+- Enable injecting languages based on their file extension and shebang ([#3970](https://github.com/helix-editor/helix/pull/3970))
+- Sort the buffer picker by most recent access ([#2980](https://github.com/helix-editor/helix/pull/2980))
+- Perform syntax highlighting in the picker asynchronously ([#7028](https://github.com/helix-editor/helix/pull/7028))
+
+Commands:
+
+- `:update` is now aliased as `:u` ([#6835](https://github.com/helix-editor/helix/pull/6835))
+- Add `extend_to_first_nonwhitespace` which acts the same as `goto_first_nonwhitespace` but always extends ([#6837](https://github.com/helix-editor/helix/pull/6837))
+- Add `:clear-register` for clearing the given register or all registers ([#5695](https://github.com/helix-editor/helix/pull/5695))
+- Add `:write-buffer-close` and `:write-buffer-close!` ([#6947](https://github.com/helix-editor/helix/pull/6947))
+
+Fixes:
+
+- Normalize LSP workspace paths ([#6517](https://github.com/helix-editor/helix/pull/6517))
+- Robustly handle invalid LSP ranges ([#6512](https://github.com/helix-editor/helix/pull/6512))
+- Fix line number display for LSP goto pickers ([#6559](https://github.com/helix-editor/helix/pull/6559))
+- Fix toggling of `soft-wrap.enable` option ([#6656](https://github.com/helix-editor/helix/pull/6656), [58e457a](https://github.com/helix-editor/helix/commit/58e457a), [#6742](https://github.com/helix-editor/helix/pull/6742))
+- Handle `workspace/configuration` requests from stopped language servers ([#6693](https://github.com/helix-editor/helix/pull/6693))
+- Fix possible crash from opening the jumplist picker ([#6672](https://github.com/helix-editor/helix/pull/6672))
+- Fix theme preview returning to current theme on line and word deletions ([#6694](https://github.com/helix-editor/helix/pull/6694))
+- Re-run crate build scripts on changes to revision and grammar repositories ([#6743](https://github.com/helix-editor/helix/pull/6743))
+- Fix crash on opening from suspended state ([#6764](https://github.com/helix-editor/helix/pull/6764))
+- Fix unwrap bug in DAP ([#6786](https://github.com/helix-editor/helix/pull/6786))
+- Always build tree-sitter parsers with C++14 and C11 ([#6792](https://github.com/helix-editor/helix/pull/6792), [#6834](https://github.com/helix-editor/helix/pull/6834), [#6845](https://github.com/helix-editor/helix/pull/6845))
+- Exit with a non-zero statuscode when tree-sitter parser builds fail ([#6795](https://github.com/helix-editor/helix/pull/6795))
+- Flip symbol range in LSP goto commands ([#6794](https://github.com/helix-editor/helix/pull/6794))
+- Fix runtime toggling of the `mouse` option ([#6675](https://github.com/helix-editor/helix/pull/6675))
+- Fix panic in inlay hint computation when view anchor is out of bounds ([#6883](https://github.com/helix-editor/helix/pull/6883))
+- Significantly improve performance of git discovery on slow file systems ([#6890](https://github.com/helix-editor/helix/pull/6890))
+- Downgrade gix log level to info ([#6915](https://github.com/helix-editor/helix/pull/6915))
+- Conserve BOM and properly support saving UTF16 files ([#6497](https://github.com/helix-editor/helix/pull/6497))
+- Correctly handle completion re-request ([#6594](https://github.com/helix-editor/helix/pull/6594))
+- Fix offset encoding in LSP `didChange` notifications ([#6921](https://github.com/helix-editor/helix/pull/6921))
+- Change `gix` logging level to info ([#6915](https://github.com/helix-editor/helix/pull/6915))
+- Improve error message when writes fail because parent directories do not exist ([#7014](https://github.com/helix-editor/helix/pull/7014))
+- Replace DAP variables popup instead of pushing more popups ([#7034](https://github.com/helix-editor/helix/pull/7034))
+- Disable tree-sitter for files after parsing for 500ms ([#7028](https://github.com/helix-editor/helix/pull/7028))
+- Fix crash when deleting with multiple cursors ([#6024](https://github.com/helix-editor/helix/pull/6024))
+- Fix selection sliding when deleting forwards in append mode ([#6024](https://github.com/helix-editor/helix/pull/6024))
+- Fix completion on paths containing spaces ([#6779](https://github.com/helix-editor/helix/pull/6779))
+
+Themes:
+
+- Style inlay hints in `dracula` theme ([#6515](https://github.com/helix-editor/helix/pull/6515))
+- Style inlay hints in `onedark` theme ([#6503](https://github.com/helix-editor/helix/pull/6503))
+- Style inlay hints and the soft-wrap indicator in `varua` ([#6568](https://github.com/helix-editor/helix/pull/6568), [#6589](https://github.com/helix-editor/helix/pull/6589))
+- Style inlay hints in `emacs` theme ([#6569](https://github.com/helix-editor/helix/pull/6569))
+- Update `base16_transparent` and `dark_high_contrast` themes ([#6577](https://github.com/helix-editor/helix/pull/6577))
+- Style inlay hints for `mellow` and `rasmus` themes ([#6583](https://github.com/helix-editor/helix/pull/6583))
+- Dim pane divider for `base16_transparent` theme ([#6534](https://github.com/helix-editor/helix/pull/6534))
+- Style inlay hints in `zenburn` theme ([#6593](https://github.com/helix-editor/helix/pull/6593))
+- Style inlay hints in `boo_berry` theme ([#6625](https://github.com/helix-editor/helix/pull/6625))
+- Add `ferra` theme ([#6619](https://github.com/helix-editor/helix/pull/6619), [#6776](https://github.com/helix-editor/helix/pull/6776))
+- Style inlay hints in `nightfox` theme ([#6655](https://github.com/helix-editor/helix/pull/6655))
+- Fix `ayu` theme family markup code block background ([#6538](https://github.com/helix-editor/helix/pull/6538))
+- Improve whitespace and search match colors in `rose_pine` theme ([#6679](https://github.com/helix-editor/helix/pull/6679))
+- Highlight selected items in `base16_transparent` theme ([#6716](https://github.com/helix-editor/helix/pull/6716))
+- Adjust everforest to resemble original more closely ([#5866](https://github.com/helix-editor/helix/pull/5866))
+- Refactor `dracula` theme ([#6552](https://github.com/helix-editor/helix/pull/6552), [#6767](https://github.com/helix-editor/helix/pull/6767), [#6855](https://github.com/helix-editor/helix/pull/6855), [#6987](https://github.com/helix-editor/helix/pull/6987))
+- Style inlay hints in `darcula` theme ([#6732](https://github.com/helix-editor/helix/pull/6732))
+- Style inlay hints in `kanagawa` theme ([#6773](https://github.com/helix-editor/helix/pull/6773))
+- Improve `ayu_dark` theme ([#6622](https://github.com/helix-editor/helix/pull/6622))
+- Refactor `noctis` theme multiple cursor highlighting ([96720e7](https://github.com/helix-editor/helix/commit/96720e7))
+- Refactor `noctis` theme whitespace rendering and indent guides ([f2ccc03](https://github.com/helix-editor/helix/commit/f2ccc03))
+- Add `amberwood` theme ([#6924](https://github.com/helix-editor/helix/pull/6924))
+- Update `nightfox` theme ([#7061](https://github.com/helix-editor/helix/pull/7061))
+
+Language support:
+
+- R language server: use the `--no-echo` flag to silence output ([#6570](https://github.com/helix-editor/helix/pull/6570))
+- Recognize CUDA files as C++ ([#6521](https://github.com/helix-editor/helix/pull/6521))
+- Add support for Hurl ([#6450](https://github.com/helix-editor/helix/pull/6450))
+- Add textobject queries for Julia ([#6588](https://github.com/helix-editor/helix/pull/6588))
+- Update Ruby highlight queries ([#6587](https://github.com/helix-editor/helix/pull/6587))
+- Add xsd to XML file-types ([#6631](https://github.com/helix-editor/helix/pull/6631))
+- Support Robot Framework ([#6611](https://github.com/helix-editor/helix/pull/6611))
+- Update Gleam tree-sitter parser ([#6641](https://github.com/helix-editor/helix/pull/6641))
+- Update git-commit tree-sitter parser ([#6692](https://github.com/helix-editor/helix/pull/6692))
+- Update Haskell tree-sitter parser ([#6317](https://github.com/helix-editor/helix/pull/6317))
+- Add injection queries for Haskell quasiquotes ([#6474](https://github.com/helix-editor/helix/pull/6474))
+- Highlight C/C++ escape sequences ([#6724](https://github.com/helix-editor/helix/pull/6724))
+- Support Markdoc ([#6432](https://github.com/helix-editor/helix/pull/6432))
+- Support OpenCL ([#6473](https://github.com/helix-editor/helix/pull/6473))
+- Support DTD ([#6644](https://github.com/helix-editor/helix/pull/6644))
+- Fix constant highlighting in Python queries ([#6751](https://github.com/helix-editor/helix/pull/6751))
+- Support Just ([#6453](https://github.com/helix-editor/helix/pull/6453))
+- Fix Go locals query for `var_spec` identifiers ([#6763](https://github.com/helix-editor/helix/pull/6763))
+- Update Markdown tree-sitter parser ([#6785](https://github.com/helix-editor/helix/pull/6785))
+- Fix Haskell workspace root for cabal projects ([#6828](https://github.com/helix-editor/helix/pull/6828))
+- Avoid extra indentation in Go switches ([#6817](https://github.com/helix-editor/helix/pull/6817))
+- Fix Go workspace roots ([#6884](https://github.com/helix-editor/helix/pull/6884))
+- Set PerlNavigator as the default Perl language server ([#6860](https://github.com/helix-editor/helix/pull/6860))
+- Highlight more sqlx macros in Rust ([#6793](https://github.com/helix-editor/helix/pull/6793))
+- Switch Odin tree-sitter grammar ([#6766](https://github.com/helix-editor/helix/pull/6766))
+- Recognize `poetry.lock` as TOML ([#6928](https://github.com/helix-editor/helix/pull/6928))
+- Recognize Jupyter notebooks as JSON ([#6927](https://github.com/helix-editor/helix/pull/6927))
+- Add language server configuration for Crystal ([#6948](https://github.com/helix-editor/helix/pull/6948))
+- Add `build.gradle.kts` to Java and Scala roots ([#6970](https://github.com/helix-editor/helix/pull/6970))
+- Recognize `sty` and `cls` files as latex ([#6986](https://github.com/helix-editor/helix/pull/6986))
+- Update Dockerfile tree-sitter grammar ([#6895](https://github.com/helix-editor/helix/pull/6895))
+- Add comment injections for Odin ([#7027](https://github.com/helix-editor/helix/pull/7027))
+- Recognize `gml` as XML ([#7055](https://github.com/helix-editor/helix/pull/7055))
+- Recognize `geojson` as JSON ([#7054](https://github.com/helix-editor/helix/pull/7054))
+
+Packaging:
+
+- Update the Nix flake dependencies, remove a deprecated option ([#6546](https://github.com/helix-editor/helix/pull/6546))
+- Fix and re-enable aarch64-macos release binary builds ([#6504](https://github.com/helix-editor/helix/pull/6504))
+- The git dependency on `tree-sitter` has been replaced with a regular crates.io dependency ([#6608](https://github.com/helix-editor/helix/pull/6608))
+
 # 23.03 (2023-03-31)
 
 23.03 brings some long-awaited and exciting features. Thank you to everyone involved! This release saw changes from 102 contributors.
@@ -1479,7 +1596,7 @@ to distinguish it in bug reports..
 
 - The `runtime/` directory is now properly detected on binary releases and
   on cargo run. `~/.config/helix/runtime` can also be used.
-- Registers can now be selected via " (for example `"ay`)
+- Registers can now be selected via " (for example, `"ay`)
 - Support for Nix files was added
 - Movement is now fully tested and matches Kakoune implementation
 - A per-file LSP symbol picker was added to space+s

Cargo.toml

@@ -5,6 +5,7 @@ members = [
   "helix-term",
   "helix-tui",
   "helix-lsp",
+  "helix-event",
   "helix-dap",
   "helix-loader",
   "helix-vcs",
@@ -32,3 +33,7 @@ inherits = "test"
 package.helix-core.opt-level = 2
 package.helix-tui.opt-level = 2
 package.helix-term.opt-level = 2
+
+[workspace.dependencies]
+tree-sitter = { version = "0.20", git = "https://github.com/tree-sitter/tree-sitter", rev = "ab09ae20d640711174b8da8a654f6b3dec93da1a" }
+nucleo = "0.2.0"

README.md

@@ -61,4 +61,4 @@ Discuss the project on the community [Matrix Space](https://matrix.to/#/#helix-c
 
 # Credits
 
-Thanks to [@JakeHL](https://github.com/JakeHL) for designing the logo!
+Thanks to [@jakenvac](https://github.com/jakenvac) for designing the logo!

VERSION

@@ -1 +1 @@
-23.03
+23.05

book/book.toml

@@ -3,10 +3,14 @@ authors = ["Blaž Hrastnik"]
 language = "en"
 multilingual = false
 src = "src"
-edit-url-template = "https://github.com/helix-editor/helix/tree/master/book/{path}?mode=edit"
 
 [output.html]
 cname = "docs.helix-editor.com"
 default-theme = "colibri"
 preferred-dark-theme = "colibri"
 git-repository-url = "https://github.com/helix-editor/helix"
+edit-url-template = "https://github.com/helix-editor/helix/edit/master/book/{path}"
+additional-css = ["custom.css"]
+
+[output.html.search]
+use-boolean-and = true

book/custom.css

@@ -0,0 +1,231 @@
+html {
+  font-family: "Inter", sans-serif;
+}
+
+.sidebar .sidebar-scrollbox {
+  padding: 0;
+}
+
+.chapter {
+  margin: 0.25rem 0;
+}
+
+.chapter li.chapter-item {
+  line-height: initial;
+  margin: 0;
+  padding: 1rem 1.5rem;
+}
+
+.chapter .section li.chapter-item {
+  line-height: inherit;
+  padding: .5rem .5rem 0 .5rem;
+}
+
+.content {
+  overflow-y: auto;
+  padding: 0 15px;
+  padding-bottom: 50px;
+}
+
+/* 2 1.75 1.5 1.25 1 .875 */
+.content h1 { font-size: 2em }
+.content h2 { font-size: 1.75em }
+.content h3 { font-size: 1.5em }
+.content h4 { font-size: 1.25em }
+.content h5 { font-size: 1em }
+.content h6 { font-size: .875em }
+
+.content h1,
+.content h2,
+.content h3,
+.content h4 {
+  font-weight: 500;
+  margin-top: 1.275em;
+  margin-bottom: .875em;
+}
+
+.content p,
+.content ol,
+.content ul,
+.content table {
+  margin-top: 0;
+  margin-bottom: .875em;
+}
+
+.content ul li {
+  margin-bottom: .25rem;
+}
+
+.content ul {
+  list-style-type: square;
+}
+
+.content ul ul,
+.content ol ul {
+  margin-bottom: .5rem;
+}
+
+.content li p {
+  margin-bottom: .5em;
+}
+
+blockquote {
+  margin: 1.5rem 0;
+  padding: 1rem 1.5rem;
+  color: var(--fg);
+  opacity: .9;
+  background-color: var(--quote-bg);
+  border-left: 4px solid var(--quote-border);
+  border-top: none;
+  border-bottom: none;
+}
+
+blockquote *:last-child {
+  margin-bottom: 0;
+}
+
+table {
+  width: 100%;
+}
+
+table thead th {
+  padding: .75rem;
+  text-align: left;
+  font-weight: 500;
+  line-height: 1.5;
+  width: auto;
+}
+
+table td {
+  padding: .75rem;
+  border: none;
+}
+
+table thead tr {
+  border: none;
+  border-bottom: 2px var(--table-border-color) solid;
+}
+
+table tbody tr {
+  border-bottom: 1px var(--table-border-line) solid;
+}
+
+table tbody tr:nth-child(2n) {
+  background: unset;
+}
+
+pre code.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 1em;
+}
+
+code.hljs {
+  padding: 3px 5px;
+}
+
+.colibri {
+  --bg: #3b224c;
+  --fg: #bcbdd0;
+  --heading-fg: #fff;
+
+  --sidebar-bg: #281733;
+  --sidebar-fg: #c8c9db;
+  --sidebar-non-existent: #505274;
+  --sidebar-active: #a4a0e8;
+  --sidebar-spacer: #2d334f;
+
+  --scrollbar: var(--sidebar-fg);
+
+  --icons: #737480;
+  --icons-hover: #b7b9cc;
+
+  /* --links: #a4a0e8; */
+  --links: #ECCDBA;
+
+  --inline-code-color: hsl(48.7, 7.8%, 70%);
+
+  --theme-popup-bg: #161923;
+  --theme-popup-border: #737480;
+  --theme-hover: rgba(0, 0, 0, .2);
+
+  --quote-bg: #281733;
+  --quote-border: hsl(226, 15%, 22%);
+
+  --table-border-color: hsl(226, 23%, 76%);
+  --table-header-bg: hsla(226, 23%, 31%, 0);
+  --table-alternate-bg: hsl(226, 23%, 14%);
+  --table-border-line: hsla(201deg, 20%, 92%, 0.2);
+
+  --searchbar-border-color: #aaa;
+  --searchbar-bg: #aeaec6;
+  --searchbar-fg: #000;
+  --searchbar-shadow-color: #aaa;
+  --searchresults-header-fg: #5f5f71;
+  --searchresults-border-color: #5c5c68;
+  --searchresults-li-bg: #242430;
+  --search-mark-bg: #acff5;
+}
+
+.colibri .content .header {
+  color: #fff;
+}
+
+/* highlight.js theme, :where() is used to avoid increasing specificity */
+
+:where(.colibri) .hljs {
+  background: #2f1e2e;
+  color: #a39e9b;
+}
+
+:where(.colibri) .hljs-comment,
+:where(.colibri) .hljs-quote {
+  color: #8d8687;
+}
+
+:where(.colibri) .hljs-link,
+:where(.colibri) .hljs-meta,
+:where(.colibri) .hljs-name,
+:where(.colibri) .hljs-regexp,
+:where(.colibri) .hljs-selector-class,
+:where(.colibri) .hljs-selector-id,
+:where(.colibri) .hljs-tag,
+:where(.colibri) .hljs-template-variable,
+:where(.colibri) .hljs-variable {
+  color: #ef6155;
+}
+
+:where(.colibri) .hljs-built_in,
+:where(.colibri) .hljs-deletion,
+:where(.colibri) .hljs-literal,
+:where(.colibri) .hljs-number,
+:where(.colibri) .hljs-params,
+:where(.colibri) .hljs-type {
+  color: #f99b15;
+}
+
+:where(.colibri) .hljs-attribute,
+:where(.colibri) .hljs-section,
+:where(.colibri) .hljs-title {
+  color: #fec418;
+}
+
+:where(.colibri) .hljs-addition,
+:where(.colibri) .hljs-bullet,
+:where(.colibri) .hljs-string,
+:where(.colibri) .hljs-symbol {
+  color: #48b685;
+}
+
+:where(.colibri) .hljs-keyword,
+:where(.colibri) .hljs-selector-tag {
+  color: #815ba4;
+}
+
+:where(.colibri) .hljs-emphasis {
+  font-style: italic;
+}
+
+:where(.colibri) .hljs-strong {
+  font-weight: 700;
+}

book/src/SUMMARY.md

@@ -10,10 +10,10 @@
 - [Migrating from Vim](./from-vim.md)
 - [Configuration](./configuration.md)
   - [Themes](./themes.md)
-  - [Icons](./icons.md)
   - [Key remapping](./remapping.md)
   - [Languages](./languages.md)
 - [Guides](./guides/README.md)
   - [Adding languages](./guides/adding_languages.md)
   - [Adding textobject queries](./guides/textobject.md)
   - [Adding indent queries](./guides/indent.md)
+  - [Adding injection queries](./guides/injection.md)

book/src/configuration.md

@@ -11,7 +11,6 @@ Example config:
 
 ```toml
 theme = "onedark"
-icons = "nerdfonts"
 
 [editor]
 line-number = "relative"
@@ -53,6 +52,7 @@ Its settings will be merged with the configuration directory `config.toml` and t
 | `auto-format` | Enable automatic formatting on save | `true` |
 | `auto-save` | Enable automatic saving on the focus moving away from Helix. Requires [focus event support](https://github.com/helix-editor/helix/wiki/Terminal-Support) from your terminal | `false` |
 | `idle-timeout` | Time in milliseconds since last keypress before idle timers trigger. Used for autocompletion, set to 0 for instant | `400` |
+| `preview-completion-insert` | Whether to apply completion item instantly when selected | `true` |
 | `completion-trigger-len` | The min-length of word under cursor to trigger autocompletion | `2` |
 | `completion-replace` | Set to `true` to make completions always replace the entire word and not just the part before the cursor | `false` |
 | `auto-info` | Whether to display info boxes | `true` |
@@ -61,8 +61,10 @@ Its settings will be merged with the configuration directory `config.toml` and t
 | `rulers` | List of column positions at which to display the rulers. Can be overridden by language specific `rulers` in `languages.toml` file | `[]` |
 | `bufferline` | Renders a line at the top of the editor displaying open buffers. Can be `always`, `never` or `multiple` (only shown if more than one buffer is in use) | `never` |
 | `color-modes` | Whether to color the mode indicator with different colors depending on the mode itself | `false` |
-| `text-width` | Maximum line length. Used for the `:reflow` command and soft-wrapping if `soft-wrap.wrap_at_text_width` is set | `80` |
+| `text-width` | Maximum line length. Used for the `:reflow` command and soft-wrapping if `soft-wrap.wrap-at-text-width` is set | `80` |
 | `workspace-lsp-roots` | Directories relative to the workspace root that are treated as LSP roots. Should only be set in `.helix/config.toml` | `[]` |
+| `default-line-ending` | The line ending to use for new documents. Can be `native`, `lf`, `crlf`, `ff`, `cr` or `nel`. `native` uses the platform's native line ending (`crlf` on Windows, otherwise `lf`). | `native` |
+| `insert-final-newline` | Whether to automatically insert a trailing line-ending on write if missing | `true` |
 
 ### `[editor.statusline]` Section
 
@@ -88,9 +90,9 @@ The `[editor.statusline]` key takes the following sub-keys:
 
 | Key           | Description | Default |
 | ---           | ---         | ---     |
-| `left`        | A list of elements aligned to the left of the statusline | `["mode", "spinner", "file-name"]` |
+| `left`        | A list of elements aligned to the left of the statusline | `["mode", "spinner", "file-name", "read-only-indicator", "file-modification-indicator"]` |
 | `center`      | A list of elements aligned to the middle of the statusline | `[]` |
-| `right`       | A list of elements aligned to the right of the statusline | `["diagnostics", "selections", "position", "file-encoding"]` |
+| `right`       | A list of elements aligned to the right of the statusline | `["diagnostics", "selections", "register", "position", "file-encoding"]` |
 | `separator`   | The character used to separate elements in the statusline | `"│"` |
 | `mode.normal` | The text shown in the `mode` element for normal mode | `"NOR"` |
 | `mode.insert` | The text shown in the `mode` element for insert mode | `"INS"` |
@@ -107,9 +109,9 @@ The following statusline elements can be configured:
 | `file-modification-indicator` | The indicator to show whether the file is modified (a `[+]` appears when there are unsaved changes) |
 | `file-encoding` | The encoding of the opened file if it differs from UTF-8 |
 | `file-line-ending` | The file line endings (CRLF or LF) |
+| `read-only-indicator` | An indicator that shows `[readonly]` when a file cannot be written |
 | `total-line-numbers` | The total line numbers of the opened file |
 | `file-type` | The type of the opened file |
-| `file-type-icon` | The icon representing the language of the open file, or else its file type (see `[editor.icons]` section) |
 | `diagnostics` | The number of warnings and/or errors |
 | `workspace-diagnostics` | The number of warnings and/or errors on workspace |
 | `selections` | The number of active selections |
@@ -119,6 +121,7 @@ The following statusline elements can be configured:
 | `separator` | The string defined in `editor.statusline.separator` (defaults to `"│"`) |
 | `spacer` | Inserts a space between elements (multiple/contiguous spacers may be specified) |
 | `version-control` | The current branch name or detached commit hash of the opened workspace |
+| `register` | The current selected register |
 
 ### `[editor.lsp]` Section
 
@@ -130,10 +133,11 @@ The following statusline elements can be configured:
 | `display-inlay-hints` | Display inlay hints[^2]                                     | `false` |
 | `display-signature-help-docs` | Display docs under signature help popup             | `true`  |
 | `snippets`      | Enables snippet completions. Requires a server restart (`:lsp-restart`) to take effect after `:config-reload`/`:set`. | `true`  |
+| `goto-reference-include-declaration` | Include declaration in the goto references popup. | `true`  |
 
 [^1]: By default, a progress spinner is shown in the statusline beside the file path.
-[^2]: You may also have to activate them in the LSP config for them to appear, not just in Helix.
-      Inlay hints in Helix are still being improved on and may be a little bit laggy/janky under some circumstances, please report any bugs you see so we can fix them!
+
+[^2]: You may also have to activate them in the LSP config for them to appear, not just in Helix. Inlay hints in Helix are still being improved on and may be a little bit laggy/janky under some circumstances. Please report any bugs you see so we can fix them!
 
 ### `[editor.cursor-shape]` Section
 
@@ -163,7 +167,7 @@ All git related options are only enabled in a git repository.
 | Key | Description | Default |
 |--|--|---------|
 |`hidden` | Enables ignoring hidden files | true
-|`follow-links` | Follow symlinks instead of ignoring them | true
+|`follow-symlinks` | Follow symlinks instead of ignoring them | true
 |`deduplicate-links` | Ignore symlinks that point at files already shown in the picker | true
 |`parents` | Enables reading ignore files from parent directories | true
 |`ignore` | Enables reading `.ignore` files | true
@@ -187,8 +191,6 @@ auto-pairs = false # defaults to `true`
 The default pairs are <code>(){}[]''""``</code>, but these can be customized by
 setting `auto-pairs` to a TOML table:
 
-Example
-
 ```toml
 [editor.auto-pairs]
 '(' = ')'
@@ -326,18 +328,6 @@ Currently unused
 
 Currently unused
 
-### `[editor.icons]` Section
-
-Option for displaying icons within the editor.
-
-> Warning: some symbols (such as file-type and symbol-kind icons that you would see in the picker) are not available in the "default" icon set. They usually require a patched font such as [NerdFonts](https://www.nerdfonts.com/) to be installed and configured in your terminal emulator, and the corresponding icon set to be configured in the editor (for example, using `icons = "nerdfonts"` in your configuration file).
-
-| Key                 | Description                                                  | Default |
-| ---                 | ---                                                          | ---     |
-| `picker`            | Whether icons in pickers are enabled.                        | `true`  |
-| `bufferline`        | Whether icons in the buffer line are enabled.                | `true`  |
-| `statusline`        | Whether icons in the status line are enabled.                | `true`  |
-
 ### `[editor.soft-wrap]` Section
 
 Options for soft wrapping lines that exceed the view width:
@@ -360,10 +350,10 @@ max-indent-retain = 0
 wrap-indicator = ""  # set wrap-indicator to "" to hide it
 ```
 
-### `[editor.explorer]` Section
-Sets explorer side width and style.
+### `[editor.smart-tab]` Section
+
 
 | Key        | Description | Default |
- | ---            | -----------                                                                              | ------- |
- | `column-width` | explorer side width                                                                      | 30      |
- | `position`     | explorer widget position, `left` or `right`                                              | `left`  |
+|------------|-------------|---------|
+| `enable` | If set to true, then when the cursor is in a position with non-whitespace to its left, instead of inserting a tab, it will run `move_parent_node_end`. If there is only whitespace to the left, then it inserts a tab as normal. With the default bindings, to explicitly insert a tab character, press Shift-tab. | `true` |
+| `supersede-menu` | Normally, when a menu is on screen, such as when auto complete is triggered, the tab key is bound to cycling through the items. This means when menus are on screen, one cannot use the tab key to trigger the `smart-tab` command. If this option is set to true, the `smart-tab` command always takes precedence, which means one cannot use the tab key to cycle through menu items. One of the other bindings must be used instead, such as arrow keys or `C-n`/`C-p`. | `false` |

book/src/from-vim.md

@@ -2,9 +2,9 @@
 
 Helix's editing model is strongly inspired from Vim and Kakoune, and a notable
 difference from Vim (and the most striking similarity to Kakoune) is that Helix
-follows the `selection → action` model. This means that the whatever you are
-going to act on (a word, a paragraph, a line, etc) is selected first and the
-action itself (delete, change, yank, etc) comes second. A cursor is simply a
+follows the `selection → action` model. This means that whatever you are
+going to act on (a word, a paragraph, a line, etc.) is selected first and the
+action itself (delete, change, yank, etc.) comes second. A cursor is simply a
 single width selection.
 
 See also Kakoune's [Migrating from Vim](https://github.com/mawww/kakoune/wiki/Migrating-from-Vim) and Helix's [Migrating from Vim](https://github.com/helix-editor/helix/wiki/Migrating-from-Vim).

book/src/generated/lang-support.md

@@ -2,14 +2,16 @@
 | --- | --- | --- | --- | --- |
 | astro | ✓ |  |  |  |
 | awk | ✓ | ✓ |  | `awk-language-server` |
-| bash | ✓ |  | ✓ | `bash-language-server` |
+| bash | ✓ | ✓ | ✓ | `bash-language-server` |
 | bass | ✓ |  |  | `bass` |
 | beancount | ✓ |  |  |  |
 | bibtex | ✓ |  |  | `texlab` |
 | bicep | ✓ |  |  | `bicep-langserver` |
+| blueprint | ✓ |  |  | `blueprint-compiler` |
 | c | ✓ | ✓ | ✓ | `clangd` |
 | c-sharp | ✓ | ✓ |  | `OmniSharp` |
-| cairo | ✓ |  |  |  |
+| cabal |  |  |  |  |
+| cairo | ✓ | ✓ | ✓ | `cairo-language-server` |
 | capnp | ✓ |  | ✓ |  |
 | clojure | ✓ |  |  | `clojure-lsp` |
 | cmake | ✓ | ✓ | ✓ | `cmake-language-server` |
@@ -17,7 +19,7 @@
 | common-lisp | ✓ |  |  | `cl-lsp` |
 | cpon | ✓ |  | ✓ |  |
 | cpp | ✓ | ✓ | ✓ | `clangd` |
-| crystal | ✓ | ✓ |  |  |
+| crystal | ✓ | ✓ |  | `crystalline` |
 | css | ✓ |  |  | `vscode-css-language-server` |
 | cue | ✓ |  |  | `cuelsp` |
 | d | ✓ | ✓ | ✓ | `serve-d` |
@@ -27,6 +29,7 @@
 | diff | ✓ |  |  |  |
 | dockerfile | ✓ |  |  | `docker-langserver` |
 | dot | ✓ |  |  | `dot-language-server` |
+| dtd | ✓ |  |  |  |
 | edoc | ✓ |  |  |  |
 | eex | ✓ |  |  |  |
 | ejs | ✓ |  |  |  |
@@ -38,8 +41,11 @@
 | erlang | ✓ | ✓ |  | `erlang_ls` |
 | esdl | ✓ |  |  |  |
 | fish | ✓ | ✓ | ✓ |  |
+| forth | ✓ |  |  | `forth-lsp` |
 | fortran | ✓ |  | ✓ | `fortls` |
+| fsharp | ✓ |  |  | `fsautocomplete` |
 | gdscript | ✓ | ✓ | ✓ |  |
+| gemini | ✓ |  |  |  |
 | git-attributes | ✓ |  |  |  |
 | git-commit | ✓ | ✓ |  |  |
 | git-config | ✓ |  |  |  |
@@ -55,6 +61,7 @@
 | graphql | ✓ |  |  |  |
 | hare | ✓ |  |  |  |
 | haskell | ✓ | ✓ |  | `haskell-language-server-wrapper` |
+| haskell-persistent | ✓ |  |  |  |
 | hcl | ✓ |  | ✓ | `terraform-ls` |
 | heex | ✓ | ✓ |  | `elixir-ls` |
 | hosts | ✓ |  |  |  |
@@ -63,13 +70,15 @@
 | idris |  |  |  | `idris2-lsp` |
 | iex | ✓ |  |  |  |
 | ini | ✓ |  |  |  |
-| java | ✓ | ✓ |  | `jdtls` |
+| java | ✓ | ✓ | ✓ | `jdtls` |
 | javascript | ✓ | ✓ | ✓ | `typescript-language-server` |
+| jinja | ✓ |  |  |  |
 | jsdoc | ✓ |  |  |  |
 | json | ✓ |  | ✓ | `vscode-json-language-server` |
 | jsonnet | ✓ |  |  | `jsonnet-language-server` |
 | jsx | ✓ | ✓ | ✓ | `typescript-language-server` |
 | julia | ✓ | ✓ | ✓ | `julia` |
+| just | ✓ | ✓ | ✓ |  |
 | kdl | ✓ |  |  |  |
 | kotlin | ✓ |  |  | `kotlin-language-server` |
 | latex | ✓ | ✓ |  | `texlab` |
@@ -80,9 +89,10 @@
 | llvm-mir-yaml | ✓ |  | ✓ |  |
 | lua | ✓ | ✓ | ✓ | `lua-language-server` |
 | make | ✓ |  |  |  |
+| markdoc | ✓ |  |  | `markdoc-ls` |
 | markdown | ✓ |  |  | `marksman` |
 | markdown.inline | ✓ |  |  |  |
-| matlab | ✓ |  |  |  |
+| matlab | ✓ | ✓ | ✓ |  |
 | mermaid | ✓ |  |  |  |
 | meson | ✓ |  | ✓ |  |
 | mint |  |  |  | `mint` |
@@ -92,21 +102,24 @@
 | nim | ✓ | ✓ | ✓ | `nimlangserver` |
 | nix | ✓ |  |  | `nil` |
 | nu | ✓ |  |  |  |
+| nunjucks | ✓ |  |  |  |
 | ocaml | ✓ |  | ✓ | `ocamllsp` |
 | ocaml-interface | ✓ |  |  | `ocamllsp` |
-| odin | ✓ |  |  | `ols` |
+| odin | ✓ |  | ✓ | `ols` |
+| opencl | ✓ | ✓ | ✓ | `clangd` |
 | openscad | ✓ |  |  | `openscad-lsp` |
 | org | ✓ |  |  |  |
 | pascal | ✓ | ✓ |  | `pasls` |
 | passwd | ✓ |  |  |  |
 | pem | ✓ |  |  |  |
-| perl | ✓ | ✓ | ✓ |  |
+| perl | ✓ | ✓ | ✓ | `perlnavigator` |
 | php | ✓ | ✓ | ✓ | `intelephense` |
 | po | ✓ | ✓ |  |  |
+| pod | ✓ |  |  |  |
 | ponylang | ✓ | ✓ | ✓ |  |
 | prisma | ✓ |  |  | `prisma-language-server` |
 | prolog |  |  |  | `swipl` |
-| protobuf | ✓ |  | ✓ |  |
+| protobuf | ✓ |  | ✓ | `bufls`, `pb` |
 | prql | ✓ |  |  |  |
 | purescript | ✓ |  |  | `purescript-language-server` |
 | python | ✓ | ✓ | ✓ | `pylsp` |
@@ -133,29 +146,35 @@
 | sql | ✓ |  |  |  |
 | sshclientconfig | ✓ |  |  |  |
 | starlark | ✓ | ✓ |  |  |
-| svelte | ✓ |  |  | `svelteserver` |
+| strace | ✓ |  |  |  |
+| svelte | ✓ |  | ✓ | `svelteserver` |
 | sway | ✓ | ✓ | ✓ | `forc` |
 | swift | ✓ |  |  | `sourcekit-lsp` |
+| t32 | ✓ |  |  |  |
 | tablegen | ✓ | ✓ | ✓ |  |
 | task | ✓ |  |  |  |
 | tfvars | ✓ |  | ✓ | `terraform-ls` |
+| todotxt | ✓ |  |  |  |
 | toml | ✓ |  |  | `taplo` |
 | tsq | ✓ |  |  |  |
 | tsx | ✓ | ✓ | ✓ | `typescript-language-server` |
 | twig | ✓ |  |  |  |
 | typescript | ✓ | ✓ | ✓ | `typescript-language-server` |
 | ungrammar | ✓ |  |  |  |
+| unison | ✓ |  |  |  |
 | uxntal | ✓ |  |  |  |
-| v | ✓ | ✓ | ✓ | `v` |
+| v | ✓ | ✓ | ✓ | `v-analyzer` |
 | vala | ✓ |  |  | `vala-language-server` |
 | verilog | ✓ | ✓ |  | `svlangserver` |
 | vhdl | ✓ |  |  | `vhdl_ls` |
 | vhs | ✓ |  |  |  |
-| vue | ✓ |  |  | `vls` |
+| vue | ✓ |  |  | `vue-language-server` |
 | wast | ✓ |  |  |  |
 | wat | ✓ |  |  |  |
+| webc | ✓ |  |  |  |
 | wgsl | ✓ |  |  | `wgsl_analyzer` |
 | wit | ✓ |  | ✓ |  |
+| wren | ✓ | ✓ | ✓ |  |
 | xit | ✓ |  |  |  |
 | xml | ✓ |  | ✓ |  |
 | yaml | ✓ |  | ✓ | `yaml-language-server` |

book/src/generated/typable-cmd.md

@@ -12,7 +12,9 @@
 | `:buffer-next`, `:bn`, `:bnext` | Goto next buffer. |
 | `:buffer-previous`, `:bp`, `:bprev` | Goto previous buffer. |
 | `:write`, `:w` | Write changes to disk. Accepts an optional path (:write some/path.txt) |
-| `:write!`, `:w!` | Force write changes to disk creating necessary subdirectories. Accepts an optional path (:write some/path.txt) |
+| `:write!`, `:w!` | Force write changes to disk creating necessary subdirectories. Accepts an optional path (:write! some/path.txt) |
+| `:write-buffer-close`, `:wbc` | Write changes to disk and closes the buffer. Accepts an optional path (:write-buffer-close some/path.txt) |
+| `:write-buffer-close!`, `:wbc!` | Force write changes to disk creating necessary subdirectories and closes the buffer. Accepts an optional path (:write-buffer-close! some/path.txt) |
 | `:new`, `:n` | Create a new scratch buffer. |
 | `:format`, `:fmt` | Format the file using the LSP formatter. |
 | `:indent-style` | Set the indentation style for editing. ('t' for tabs or 1-8 for number of spaces.) |
@@ -22,6 +24,7 @@
 | `:write-quit`, `:wq`, `:x` | Write changes to disk and close the current view. Accepts an optional path (:wq some/path.txt) |
 | `:write-quit!`, `:wq!`, `:x!` | Write changes to disk and close the current view forcefully. Accepts an optional path (:wq! some/path.txt) |
 | `:write-all`, `:wa` | Write changes from all buffers to disk. |
+| `:write-all!`, `:wa!` | Forcefully write changes from all buffers to disk creating necessary subdirectories. |
 | `:write-quit-all`, `:wqa`, `:xa` | Write changes from all buffers to disk and close all views. |
 | `:write-quit-all!`, `:wqa!`, `:xa!` | Write changes from all buffers to disk and close all views forcefully (ignoring unsaved changes). |
 | `:quit-all`, `:qa` | Close all views. |
@@ -29,7 +32,7 @@
 | `:cquit`, `:cq` | Quit with exit code (default 1). Accepts an optional integer exit code (:cq 2). |
 | `:cquit!`, `:cq!` | Force quit with exit code (default 1) ignoring unsaved changes. Accepts an optional integer exit code (:cq! 2). |
 | `:theme` | Change the editor theme (show current theme if no name specified). |
-| `:icons` | Change the editor icon flavor (show current flavor if no name specified). |
+| `:yank-join` | Yank joined selections. A separator can be provided as first argument. Default value is newline. |
 | `:clipboard-yank` | Yank main selection into system clipboard. |
 | `:clipboard-yank-join` | Yank joined selections into system clipboard. A separator can be provided as first argument. Default value is newline. |
 | `:primary-clipboard-yank` | Yank main selection into system primary clipboard. |
@@ -45,13 +48,14 @@
 | `:show-directory`, `:pwd` | Show the current working directory. |
 | `:encoding` | Set encoding. Based on `https://encoding.spec.whatwg.org`. |
 | `:character-info`, `:char` | Get info about the character under the primary cursor. |
-| `:reload` | Discard changes and reload from the source file. |
-| `:reload-all` | Discard changes and reload all documents from the source files. |
-| `:update` | Write changes only if the file has been modified. |
+| `:reload`, `:rl` | Discard changes and reload from the source file. |
+| `:reload-all`, `:rla` | Discard changes and reload all documents from the source files. |
+| `:update`, `:u` | Write changes only if the file has been modified. |
 | `:lsp-workspace-command` | Open workspace command picker |
-| `:lsp-restart` | Restarts the Language Server that is in use by the current doc |
-| `:lsp-stop` | Stops the Language Server that is in use by the current doc |
+| `:lsp-restart` | Restarts the language servers used by the current doc |
+| `:lsp-stop` | Stops the language servers that are used by the current doc |
 | `:tree-sitter-scopes` | Display tree sitter scopes, primarily for theming and development. |
+| `:tree-sitter-highlight-name` | Display name of tree-sitter highlight scope under the cursor. |
 | `:debug-start`, `:dbg` | Start a debug session from a given template with given parameters. |
 | `:debug-remote`, `:dbg-tcp` | Connect to a debug adapter by TCP address and start a debugging session from a given template with given parameters. |
 | `:debug-eval` | Evaluate expression in current debug context. |
@@ -79,3 +83,5 @@
 | `:pipe-to` | Pipe each selection to the shell command, ignoring output. |
 | `:run-shell-command`, `:sh` | Run a shell command |
 | `:reset-diff-change`, `:diffget`, `:diffg` | Reset the diff change at the cursor position. |
+| `:clear-register` | Clear given register. If no argument is provided, clear all registers. |
+| `:redraw` | Clear and re-render the whole UI |

book/src/guides/adding_languages.md

@@ -9,6 +9,7 @@ below.
    necessary configuration for the new language. For more information on
    language configuration, refer to the
    [language configuration section](../languages.md) of the documentation.
+   A new language server can be added by extending the `[language-server]` table in the same file.
 2. If you are adding a new language or updating an existing language server
    configuration, run the command `cargo xtask docgen` to update the
    [Language Support](../lang-support.md) documentation.

book/src/guides/indent.md

@@ -1,76 +1,299 @@
 # Adding indent queries
 
-Helix uses tree-sitter to correctly indent new lines. This requires
-a tree-sitter grammar and an `indent.scm` query file placed in
-`runtime/queries/{language}/indents.scm`. The indentation for a line
-is calculated by traversing the syntax tree from the lowest node at the
-beginning of the new line. Each of these nodes contributes to the total
-indent when it is captured by the query (in what way depends on the name
-of the capture).
+Helix uses tree-sitter to correctly indent new lines. This requires a tree-
+sitter grammar and an `indent.scm` query file placed in `runtime/queries/
+{language}/indents.scm`. The indentation for a line is calculated by traversing
+the syntax tree from the lowest node at the beginning of the new line (see
+[Indent queries](#indent-queries)). Each of these nodes contributes to the total
+indent when it is captured by the query (in what way depends on the name of
+the capture.
 
 Note that it matters where these added indents begin. For example,
 multiple indent level increases that start on the same line only increase
-the total indent level by 1.
+the total indent level by 1. See [Capture types](#capture-types).
 
-## Scopes
+## Indent queries
 
-Added indents don't always apply to the whole node. For example, in most
-cases when a node should be indented, we actually only want everything
-except for its first line to be indented. For this, there are several
-scopes (more scopes may be added in the future if required):
+When Helix is inserting a new line through `o`, `O`, or `<ret>`, to determine
+the indent level for the new line, the query in `indents.scm` is run on the
+document. The starting position of the query is the end of the line above where
+a new line will be inserted.
 
-- `all`:
-This scope applies to the whole captured node. This is only different from
-`tail` when the captured node is the first node on its line.
+For `o`, the inserted line is the line below the cursor, so that starting
+position of the query is the end of the current line.
 
-- `tail`:
-This scope applies to everything except for the first line of the
-captured node.
+```rust
+fn need_hero(some_hero: Hero, life: Life) -> {
+    matches!(some_hero, Hero { // ←─────────────────╮
+        strong: true,//←╮  ↑  ↑                     │
+        fast: true,  // │  │  ╰── query start       │
+        sure: true,  // │  ╰───── cursor            ├─ traversal 
+        soon: true,  // ╰──────── new line inserted │  start node
+    }) &&            //                             │
+//  ↑                                               │
+//  ╰───────────────────────────────────────────────╯
+    some_hero > life
+}
+```
 
-Every capture type has a default scope which should do the right thing
-in most situations. When a different scope is required, this can be
-changed by using a `#set!` declaration anywhere in the pattern:
-```scm
-(assignment_expression
-  right: (_) @indent
-  (#set! "scope" "all"))
+For `O`, the newly inserted line is the *current* line, so the starting position
+of the query is the end of the line above the cursor.
+
+```rust
+fn need_hero(some_hero: Hero, life: Life) -> { // ←─╮
+    matches!(some_hero, Hero { // ←╮          ↑     │
+        strong: true,//    ↑   ╭───╯          │     │
+        fast: true,  //    │   │ query start ─╯     │
+        sure: true,  //    ╰───┼ cursor             ├─ traversal
+        soon: true,  //        ╰ new line inserted  │  start node
+    }) &&            //                             │
+    some_hero > life //                             │
+} // ←──────────────────────────────────────────────╯
 ```
 
-## Capture types
+From this starting node, the syntax tree is traversed up until the root node.
+Each indent capture is collected along the way, and then combined according to
+their [capture types](#capture-types) and [scopes](#scopes) to a final indent
+level for the line.
 
-- `@indent` (default scope `tail`):
-Increase the indent level by 1. Multiple occurrences in the same line
-don't stack. If there is at least one `@indent` and one `@outdent`
-capture on the same line, the indent level isn't changed at all.
+### Capture types
 
+- `@indent` (default scope `tail`):
+  Increase the indent level by 1. Multiple occurrences in the same line *do not*
+  stack. If there is at least one `@indent` and one `@outdent` capture on the
+  same line, the indent level isn't changed at all.
 - `@outdent` (default scope `all`):
   Decrease the indent level by 1. The same rules as for `@indent` apply.
-
+- `@indent.always` (default scope `tail`):
+  Increase the indent level by 1. Multiple occurrences on the same line *do*
+  stack. The final indent level is `@indent.always` – `@outdent.always`. If
+  an `@indent` and an `@indent.always` are on the same line, the `@indent` is
+  ignored.
+- `@outdent.always` (default scope `all`):
+  Decrease the indent level by 1. The same rules as for `@indent.always` apply.
+- `@align` (default scope `all`):
+  Align everything inside this node to some anchor. The anchor is given
+  by the start of the node captured by `@anchor` in the same pattern.
+  Every pattern with an `@align` should contain exactly one `@anchor`.
+  Indent (and outdent) for nodes below (in terms of their starting line)
+  the `@align` node is added to the indentation required for alignment.
 - `@extend`:
-Extend the range of this node to the end of the line and to lines that
-are indented more than the line that this node starts on. This is useful
-for languages like Python, where for the purpose of indentation some nodes
-(like functions or classes) should also contain indented lines that follow them.
-
+  Extend the range of this node to the end of the line and to lines that are
+  indented more than the line that this node starts on. This is useful for
+  languages like Python, where for the purpose of indentation some nodes (like
+  functions or classes) should also contain indented lines that follow them.
 - `@extend.prevent-once`:
   Prevents the first extension of an ancestor of this node. For example, in Python
-a return expression always ends the block that it is in. Note that this only stops the
-extension of the next `@extend` capture. If multiple ancestors are captured,
-only the extension of the innermost one is prevented. All other ancestors are unaffected
-(regardless of whether the innermost ancestor would actually have been extended).
+  a return expression always ends the block that it is in. Note that this only
+  stops the extension of the next `@extend` capture. If multiple ancestors are
+  captured, only the extension of the innermost one is prevented. All other
+  ancestors are unaffected (regardless of whether the innermost ancestor would
+  actually have been extended).
+
+#### `@indent` / `@outdent`
+
+Consider this example:
+
+```rust
+fn shout(things: Vec<Thing>) {
+    //                       ↑
+    //                       ├───────────────────────╮ indent level
+    //                    @indent                    ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄
+    //                                               │
+    let it_all = |out| { things.filter(|thing| { //  │      1
+    //                 ↑                       ↑     │
+    //                 ├───────────────────────┼─────┼┄┄┄┄┄┄┄┄┄┄┄┄┄┄
+    //              @indent                 @indent  │
+    //                                               │      2
+        thing.can_do_with(out) //                    │
+    })}; //                                          ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄
+  //↑↑↑                                              │      1
+} //╰┼┴──────────────────────────────────────────────┴┄┄┄┄┄┄┄┄┄┄┄┄┄┄
+// 3x @outdent
+```
+
+```scm
+((block) @indent)
+["}" ")"] @outdent
+```
+
+Note how on the second line, we have two blocks begin on the same line. In this
+case, since both captures occur on the same line, they are combined and only
+result in a net increase of 1. Also note that the closing `}`s are part of the
+`@indent` captures, but the 3 `@outdent`s also combine into 1 and result in that
+line losing one indent level.
+
+#### `@extend` / `@extend.prevent-once`
+
+For an example of where `@extend` can be useful, consider Python, which is
+whitespace-sensitive.
+
+```scm
+]
+  (parenthesized_expression)
+  (function_definition)
+  (class_definition)
+] @indent
+
+```
+
+```python
+class Hero:
+    def __init__(self, strong, fast, sure, soon):#  ←─╮
+        self.is_strong = strong #                     │
+        self.is_fast = fast     # ╭─── query start    │
+        self.is_sure = sure     # │ ╭─ cursor         │
+        self.is_soon = soon     # │ │                 │
+        #     ↑            ↑      │ │                 │
+        #     │            ╰──────╯ │                 │
+        #     ╰─────────────────────╯                 │
+        #                                             ├─ traversal
+    def need_hero(self, life):         #              │  start node
+        return (                       #              │
+            self.is_strong             #              │
+            and self.is_fast           #              │
+            and self.is_sure           #              │
+            and self.is_soon           #              │
+            and self > life            #              │
+        ) # ←─────────────────────────────────────────╯
+```
+
+Without braces to catch the scope of the function, the smallest descendant of
+the cursor on a line feed ends up being the entire inside of the class. Because
+of this, it will miss the entire function node and its indent capture, leading
+to an indent level one too small.
+
+To address this case, `@extend` tells helix to "extend" the captured node's span
+to the line feed and every consecutive line that has a greater indent level than
+the line of the node.
+
+```scm
+(parenthesized_expression) @indent
+
+]
+  (function_definition)
+  (class_definition)
+] @indent @extend
+
+```
+
+```python
+class Hero:
+    def __init__(self, strong, fast, sure, soon):#  ←─╮
+        self.is_strong = strong #                     │
+        self.is_fast = fast     # ╭─── query start    ├─ traversal
+        self.is_sure = sure     # │ ╭─ cursor         │  start node
+        self.is_soon = soon     # │ │ ←───────────────╯
+        #     ↑            ↑      │ │                 
+        #     │            ╰──────╯ │
+        #     ╰─────────────────────╯
+    def need_hero(self, life):
+        return (
+            self.is_strong
+            and self.is_fast
+            and self.is_sure
+            and self.is_soon
+            and self > life
+        )
+```
+
+Furthermore, there are some cases where extending to everything with a greater
+indent level may not be desirable. Consider the `need_hero` function above. If
+our cursor is on the last line of the returned expression.
 
+```python
+class Hero:
+    def __init__(self, strong, fast, sure, soon):
+        self.is_strong = strong
+        self.is_fast = fast
+        self.is_sure = sure
+        self.is_soon = soon
+
+    def need_hero(self, life):
+        return (
+            self.is_strong
+            and self.is_fast
+            and self.is_sure
+            and self.is_soon
+            and self > life
+        ) # ←─── cursor
+    #←────────── where cursor should go on new line
+```
+
+In Python, the are a few tokens that will always end a scope, such as a return
+statement. Since the scope ends, so should the indent level. But because the
+function span is extended to every line with a greater indent level, a new line
+would just continue on the same level. And an `@outdent` would not help us here
+either, since it would cause everything in the parentheses to become outdented
+as well.
+
+To help, we need to signal an end to the extension. We can do this with
+`@extend.prevent-once`.
+
+```scm
+(parenthesized_expression) @indent
+
+]
+  (function_definition)
+  (class_definition)
+] @indent @extend
+
+(return_statement) @extend.prevent-once
+```
+
+#### `@indent.always` / `@outdent.always`
+
+As mentioned before, normally if there is more than one `@indent` or `@outdent`
+capture on the same line, they are combined.
+
+Sometimes, there are cases when you may want to ensure that every indent capture
+is additive, regardless of how many occur on the same line. Consider this
+example in YAML.
+
+```yaml
+  - foo: bar
+# ↑ ↑
+# │ ╰─────────────── start of map
+# ╰───────────────── start of list element
+    baz: quux # ←─── cursor
+    # ←───────────── where the cursor should go on a new line
+    garply: waldo
+  - quux:
+      bar: baz
+    xyzzy: thud
+    fred: plugh
+```
+
+In YAML, you often have lists of maps. In these cases, the syntax is such that
+the list element and the map both start on the same line. But we really do want
+to start an indentation for each of these so that subsequent keys in the map
+hang over the list and align properly. This is where `@indent.always` helps.
+
+```scm
+((block_sequence_item) @item @indent.always @extend
+  (#not-one-line? @item))
+
+((block_mapping_pair
+    key: (_) @key
+    value: (_) @val
+    (#not-same-line? @key @val)
+  ) @indent.always @extend
+)
+```
 
 ## Predicates
 
 In some cases, an S-expression cannot express exactly what pattern should be matched.
 For that, tree-sitter allows for predicates to appear anywhere within a pattern,
 similar to how `#set!` declarations work:
+
 ```scm
 (some_kind
   (child_kind) @indent
   (#predicate? arg1 arg2 ...)
 )
 ```
+
 The number of arguments depends on the predicate that's used.
 Each argument is either a capture (`@name`) or a string (`"some string"`).
 The following predicates are supported by tree-sitter:
@@ -91,3 +314,47 @@ argument (a string).
 
 - `#same-line?`/`#not-same-line?`:
 The captures given by the 2 arguments must/must not start on the same line.
+
+- `#one-line?`/`#not-one-line?`:
+The captures given by the fist argument must/must span a total of one line.
+
+### Scopes
+
+Added indents don't always apply to the whole node. For example, in most
+cases when a node should be indented, we actually only want everything
+except for its first line to be indented. For this, there are several
+scopes (more scopes may be added in the future if required):
+
+- `tail`:
+This scope applies to everything except for the first line of the
+captured node.
+- `all`:
+This scope applies to the whole captured node. This is only different from
+`tail` when the captured node is the first node on its line.
+
+For example, imagine we have the following function
+
+```rust
+fn aha() { // ←─────────────────────────────────────╮
+  let take = "on me";  // ←──────────────╮  scope:  │
+  let take = "me on";             //     ├─ "tail"  ├─ (block) @indent
+  let ill = be_gone_days(1 || 2); //     │          │
+} // ←───────────────────────────────────┴──────────┴─ "}" @outdent
+                                         //                scope: "all"
+```
+
+We can write the following query with the `#set!` declaration:
+
+  ```scm
+  ((block) @indent
+   (#set! "scope" "tail"))
+  ("}" @outdent
+   (#set! "scope" "all"))
+  ```
+
+As we can see, the "tail" scope covers the node, except for the first line.
+Everything up to and including the closing brace gets an indent level of 1.
+Then, on the closing brace, we encounter an outdent with a scope of "all", which
+means the first line is included, and the indent level is cancelled out on this
+line. (Note these scopes are the defaults for `@indent` and `@outdent`—they are
+written explicitly for demonstration.)

book/src/guides/injection.md

@@ -0,0 +1,57 @@
+# Adding Injection Queries
+
+Writing language injection queries allows one to highlight a specific node as a different language.
+In addition to the [standard](upstream-docs) language injection options used by tree-sitter, there
+are a few Helix specific extensions that allow for more control.
+
+And example of a simple query that would highlight all strings as bash in Nix:
+```scm
+((string_expression (string_fragment) @injection.content)
+  (#set! injection.language "bash"))
+```
+
+## Capture Types
+
+- `@injection.language` (standard):
+The captured node may contain the language name used to highlight the node captured by
+`@injection.content`.
+
+- `@injection.content` (standard):
+Marks the content to be highlighted as the language captured with `@injection.language` _et al_.
+
+- `@injection.filename` (extension):
+The captured node may contain a filename with a file-extension known to Helix,
+highlighting `@injection.content` as that language. This uses the language extensions defined in
+both the default languages.toml distributed with Helix, as well as user defined languages.
+
+- `@injection.shebang` (extension):
+The captured node may contain a shebang used to choose a language to highlight as. This also uses
+the shebangs defined in the default and user `languages.toml`.
+
+## Settings
+
+- `injection.combined` (standard):
+Indicates that all the matching nodes in the tree should have their content parsed as one
+nested document.
+
+- `injection.language` (standard):
+Forces the captured content to be highlighted as the given language
+
+- `injection.include-children` (standard):
+Indicates that the content node’s entire text should be re-parsed, including the text of its child
+nodes. By default, child nodes’ text will be excluded from the injected document.
+
+- `injection.include-unnamed-children` (extension):
+Same as `injection.include-children` but only for unnamed child nodes.
+
+## Predicates
+
+- `#eq?` (standard):
+The first argument (a capture) must be equal to the second argument
+(a capture or a string).
+
+- `#match?` (standard):
+The first argument (a capture) must match the regex given in the
+second argument (a string).
+
+[upstream-docs]: http://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection

book/src/icons.md

@@ -1,140 +0,0 @@
-# Icons
-
-## Requirements
-
-File-type and symbol-kind icons require a patched font such as [NerdFonts](https://www.nerdfonts.com/) to be installed and configured in your terminal emulator. These types of fonts are called *patched* fonts because they define arbitrary symbols for a range of Unicode values, which may vary from one font to another. Therefore, you need to use an icon flavor adapted to your configured terminal font, otherwise you may end up with undefined characters and mismatched icons.
-
-To enable file-type and symbol-kind icons within the editor, see the `[editor.icons]` section of the [configuration file](./configuration.md).
-
-To use an icon flavor add `icons = "<name>"` to your [`config.toml`](./configuration.md) at the very top of the file before the first section or select it during runtime using `:icons <name>`.
-
-## Creating an icon flavor
-
-Create a file with the name of your icon flavor as file name (i.e `myicons.toml`) and place it in your `icons` directory (i.e `~/.config/helix/icons`). The directory might have to be created beforehand.
-
-The name "default" is reserved for the builtin icons and cannot be overridden by user defined icons.
-
-The name of the icon flavor must be set using the `name` key.
-
-The default icons.toml can be found [here](https://github.com/helix-editor/helix/blob/master/icons.toml), and user submitted icon flavors [here](https://github.com/helix-editor/helix/blob/master/runtime/icons). 
-
-Icons flavors have five sections:
-
-- Diagnostics
-- Breakpoints
-- Diff
-- Symbol kinds
-- Mime types
-
-Each line in these sections is specified as below:
-
-```toml
-key = { icon = "…", color = "#ff0000" }
-```
-
-where `key` represents what you want to style, `icon` specifies the character to show as the icon, and `color` specifies the foreground color of the icon. `color` can be omitted to defer to the defaults.
-
-### Diagnostic icons
-
-The `[diagnostic]` section defines four **required** diagnostic icons:
-
-- `error`
-- `warning`
-- `info`
-- `hint`
-
-These icons appear in the gutter, in the diagnostic pickers as well as in the status line diagnostic component.
-By default, they have the foreground color defined in the current theme's corresponding keys.
-
-> An icon flavor TOML file must define all of these icons.
-
-### Diff icons
-
-The `[diff]` section defines three **required** diffing icons:
-
-- `added`
-- `deleted`
-- `modified`
-
-These icons appear in the gutter.
-By default, they have the foreground color defined in the current theme's corresponding keys.
-
-> An icon flavor TOML file must define all of these icons.
-
-### Breakpoint icons
-
-The `[breakpoint]` section defines two **required** breakpoint icons:
-
-- `verified`
-- `unverified`
-
-These icons appear in the gutter while using the Debug Adapter Protocol (DAP). Their color depends on the breakpoint's condition and log message, it cannot be overridden by the `color` key.
-
-> An icon flavor TOML file must define all of these icons.
-
-### Symbol kinds icons
-
-The `[symbol-kind]` section defines **optional** icons for the following required LSP-defined symbol kinds:
-
-- `file` (this icon is also used on files for which the mime type has not been defined in the next section, as a "generic file" icon)
-- `module`
-- `namespace`
-- `package`
-- `class`
-- `method`
-- `property`
-- `field`
-- `constructor`
-- `enumeration`
-- `interface`
-- `variable`
-- `function`
-- `constant`
-- `string`
-- `number`
-- `boolean`
-- `array`
-- `object`
-- `key`
-- `null`
-- `enum-member`
-- `structure`
-- `event`
-- `operator`
-- `type-parameter`
-
-By default, these icons have the same style as the loaded theme's `keyword` key. Their style can be customized using the `symbolkind` key in the theme configuration file, or it can individually be overridden by their `color` key.
-
-> An icon flavor TOML file must define either none or all of these icons.
-
-### Mime types icons
-
-The `[mime-type]` section defines **optional** icons for mime types or filename, such as:
-
-```toml
-[mime-type]
-".bashrc" = { icon = "…", color = "#…" }
-"LICENSE" = { icon = "…", color = "#…" }
-"rs" = { icon = "…", color = "#…" }
-```
-
-These icons appear in the file picker, in the statusline `file-type-icon` component, and in the bufferline (when enabled).
-
-> An icon flavor TOML file can define none, some or all of these icons.
-
-### Inheritance
-
-Extend upon other icon flavors by setting the `inherits` property to an existing theme.
-
-```toml
-inherits = "nerdfonts"
-name = "custom_nerdfonts"
-
-# Override the icon for generic files:
-[symbol-kind]
-file = {icon = "…"}
-
-# Override the icon for Rust files
-[mime-type]
-"rs" = { icon = "…", color = "#…" }
-```

book/src/install.md

@@ -6,17 +6,23 @@
 - [Linux](#linux)
   - [Ubuntu](#ubuntu)
   - [Fedora/RHEL](#fedorarhel)
-  - [Arch Linux community](#arch-linux-community)
+  - [Arch Linux extra](#arch-linux-extra)
   - [NixOS](#nixos)
+  - [Flatpak](#flatpak)
+  - [Snap](#snap)
   - [AppImage](#appimage)
 - [macOS](#macos)
   - [Homebrew Core](#homebrew-core)
 - [Windows](#windows)
+  - [Winget](#winget)
   - [Scoop](#scoop)
   - [Chocolatey](#chocolatey)
   - [MSYS2](#msys2)
 - [Building from source](#building-from-source)
   - [Configuring Helix's runtime files](#configuring-helixs-runtime-files)
+    - [Linux and macOS](#linux-and-macos)
+    - [Windows](#windows)
+    - [Multiple runtime directories](#multiple-runtime-directories)
   - [Validating the installation](#validating-the-installation)
   - [Configure the desktop shortcut](#configure-the-desktop-shortcut)
 <!--toc:end-->
@@ -40,8 +46,6 @@ line.
 
 ## Linux, macOS, Windows and OpenBSD packaging status
 
-Helix is available for Linux, macOS and Windows via the official repositories listed below.
-
 [![Packaging status](https://repology.org/badge/vertical-allrepos/helix.svg)](https://repology.org/project/helix/versions)
 
 ## Linux
@@ -50,7 +54,7 @@ The following third party repositories are available:
 
 ### Ubuntu
 
-Helix is available via [Maveonair's PPA](https://launchpad.net/~maveonair/+archive/ubuntu/helix-editor):
+Add the `PPA` for Helix:
 
 ```sh
 sudo add-apt-repository ppa:maveonair/helix-editor
@@ -60,16 +64,16 @@ sudo apt install helix
 
 ### Fedora/RHEL
 
-Helix is available via `copr`:
+Enable the `COPR` repository for Helix:
 
 ```sh
 sudo dnf copr enable varlad/helix
 sudo dnf install helix
 ```
 
-### Arch Linux community
+### Arch Linux extra
 
-Releases are available in the `community` repository:
+Releases are available in the `extra` repository:
 
 ```sh
 sudo pacman -S helix
@@ -79,7 +83,10 @@ in the AUR, which builds the master branch.
 
 ### NixOS
 
-Helix is available as a [flake](https://nixos.wiki/wiki/Flakes) in the project
+Helix is available in [nixpkgs](https://github.com/nixos/nixpkgs) through the `helix` attribute,
+the unstable channel usually carries the latest release.
+
+Helix is also available as a [flake](https://nixos.wiki/wiki/Flakes) in the project
 root. Use `nix develop` to spin up a reproducible development shell. Outputs are
 cached for each push to master using [Cachix](https://www.cachix.org/). The
 flake is configured to automatically make use of this cache assuming the user
@@ -89,10 +96,29 @@ If you are using a version of Nix without flakes enabled,
 [install Cachix CLI](https://docs.cachix.org/installation) and use
 `cachix use helix` to configure Nix to use cached outputs when possible.
 
+### Flatpak
+
+Helix is available on [Flathub](https://flathub.org/en-GB/apps/com.helix_editor.Helix):
+
+```sh
+flatpak install flathub com.helix_editor.Helix
+flatpak run com.helix_editor.Helix
+```
+
+### Snap
+
+Helix is available on [Snapcraft](https://snapcraft.io/helix) and can be installed with:
+
+```sh
+snap install --classic helix
+```
+
+This will install Helix as both `/snap/bin/helix` and `/snap/bin/hx`, so make sure `/snap/bin` is in your `PATH`.
+
 ### AppImage
 
-Install Helix using [AppImage](https://appimage.org/).
-Download Helix AppImage from the [latest releases](https://github.com/helix-editor/helix/releases/latest) page.
+Install Helix using the Linux [AppImage](https://appimage.org/) format.
+Download the official Helix AppImage from the [latest releases](https://github.com/helix-editor/helix/releases/latest) page.
 
 ```sh
 chmod +x helix-*.AppImage # change permission for executable mode
@@ -109,9 +135,17 @@ brew install helix
 
 ## Windows
 
-Install on Windows using [Scoop](https://scoop.sh/), [Chocolatey](https://chocolatey.org/)
+Install on Windows using [Winget](https://learn.microsoft.com/en-us/windows/package-manager/winget/), [Scoop](https://scoop.sh/), [Chocolatey](https://chocolatey.org/)
 or [MSYS2](https://msys2.org/).
 
+### Winget
+Windows Package Manager winget command-line tool is by default available on Windows 11 and modern versions of Windows 10 as a part of the App Installer.
+You can get [App Installer from the Microsoft Store](https://www.microsoft.com/p/app-installer/9nblggh4nns1#activetab=pivot:overviewtab). If it's already installed, make sure it is updated with the latest version.
+
+```sh
+winget install Helix.Helix
+```
+
 ### Scoop
 
 ```sh
@@ -134,33 +168,41 @@ pacman -S mingw-w64-ucrt-x86_64-helix
 
 ## Building from source
 
-Clone the repository:
+Requirements:
+
+Clone the Helix GitHub repository into a directory of your choice. The
+examples in this documentation assume installation into either `~/src/` on
+Linux and macOS, or `%userprofile%\src\` on Windows.
+
+- The [Rust toolchain](https://www.rust-lang.org/tools/install)
+- The [Git version control system](https://git-scm.com/)
+- A C++14 compatible compiler to build the tree-sitter grammars, for example GCC or Clang
+
+If you are using the `musl-libc` standard library instead of `glibc` the following environment variable must be set during the build to ensure tree-sitter grammars can be loaded correctly:
+
+```sh
+RUSTFLAGS="-C target-feature=-crt-static"
+```
+
+1. Clone the repository:
 
    ```sh
    git clone https://github.com/helix-editor/helix
    cd helix
    ```
 
-Compile from source:
+2. Compile from source:
 
    ```sh
    cargo install --path helix-term --locked
    ```
 
    This command will create the `hx` executable and construct the tree-sitter
-grammars in the local `runtime` folder. To build the tree-sitter grammars requires
-a c++ compiler to be installed, for example `gcc-c++`.
-
-> 💡 If you are using the musl-libc instead of glibc the following environment variable must be set during the build
-> to ensure tree-sitter grammars can be loaded correctly:
->
-> ```sh
-> RUSTFLAGS="-C target-feature=-crt-static"
-> ```
+   grammars in the local `runtime` folder.
 
 > 💡 Tree-sitter grammars can be fetched and compiled if not pre-packaged. Fetch
-> grammars with `hx --grammar fetch` (requires `git`) and compile them with
-> `hx --grammar build` (requires a C++ compiler). This will install them in
+> grammars with `hx --grammar fetch` and compile them with
+> `hx --grammar build`. This will install them in
 > the `runtime` directory within the user's helix config directory (more
 > [details below](#multiple-runtime-directories)).
 
@@ -168,18 +210,22 @@ a c++ compiler to be installed, for example `gcc-c++`.
 
 #### Linux and macOS
 
-Either set the `HELIX_RUNTIME` environment variable to point to the runtime files and add it to your `~/.bashrc` or equivalent:
+The **runtime** directory is one below the Helix source, so either set a
+`HELIX_RUNTIME` environment variable to point to that directory and add it to
+your `~/.bashrc` or equivalent:
 
 ```sh
-HELIX_RUNTIME=/home/user-name/src/helix/runtime
+HELIX_RUNTIME=~/src/helix/runtime
 ```
 
-Or, create a symlink in `~/.config/helix` that links to the source code directory:
+Or, create a symbolic link:
 
 ```sh
-ln -s $PWD/runtime ~/.config/helix/runtime
+ln -Ts $PWD/runtime ~/.config/helix/runtime
 ```
 
+If the above command fails to create a symbolic link because the file exists either move `~/.config/helix/runtime` to a new location or delete it, then run the symlink command above again. 
+
 #### Windows
 
 Either set the `HELIX_RUNTIME` environment variable to point to the runtime files using the Windows setting (search for

book/src/keymap.md

@@ -15,7 +15,7 @@
       - [Popup](#popup)
     - [Unimpaired](#unimpaired)
 - [Insert mode](#insert-mode)
-- [Select / extend mode](#select-extend-mode)
+- [Select / extend mode](#select--extend-mode)
 - [Picker](#picker)
 - [Prompt](#prompt)
 
@@ -25,6 +25,8 @@
 
 ## Normal mode
 
+Normal mode is the default mode when you launch helix. Return to it from other modes by typing `Escape`.
+
 ### Movement
 
 > NOTE: Unlike Vim, `f`, `F`, `t` and `T` are not confined to the current line.
@@ -32,8 +34,8 @@
 | Key                   | Description                                        | Command                     |
 | -----                 | -----------                                        | -------                     |
 | `h`, `Left`           | Move left                                          | `move_char_left`            |
-| `j`, `Down`           | Move down                                          | `move_line_down`            |
-| `k`, `Up`             | Move up                                            | `move_line_up`              |
+| `j`, `Down`           | Move down                                          | `move_visual_line_down`     |
+| `k`, `Up`             | Move up                                            | `move_visual_line_up`       |
 | `l`, `Right`          | Move right                                         | `move_char_right`           |
 | `w`                   | Move next word start                               | `move_next_word_start`      |
 | `b`                   | Move previous word start                           | `move_prev_word_start`      |
@@ -111,6 +113,7 @@
 | `s`                   | Select all regex matches inside selections                        | `select_regex`                       |
 | `S`                   | Split selection into sub selections on regex matches              | `split_selection`                    |
 | `Alt-s`               | Split selection on newlines                                       | `split_selection_on_newline`         |
+| `Alt-minus`           | Merge selections                                                  | `merge_selections`                   |
 | `Alt-_`               | Merge consecutive selections                                      | `merge_consecutive_selections`       |
 | `&`                   | Align selection in columns                                        | `align_selections`                   |
 | `_`                   | Trim whitespace from the selection                                | `trim_selections`                    |
@@ -218,6 +221,8 @@ Jumps to various locations.
 | `n`   | Go to next buffer                                | `goto_next_buffer`         |
 | `p`   | Go to previous buffer                            | `goto_previous_buffer`     |
 | `.`   | Go to last modification in current file          | `goto_last_modification`   |
+| `j`   | Move down textual (instead of visual) line       | `move_line_down`           |
+| `k`   | Move up textual (instead of visual) line         | `move_line_up`             |
 
 #### Match mode
 
@@ -286,13 +291,11 @@ This layer is a kludge of mappings, mostly pickers.
 | `w`     | Enter [window mode](#window-mode)                                       | N/A                                        |
 | `p`     | Paste system clipboard after selections                                 | `paste_clipboard_after`                    |
 | `P`     | Paste system clipboard before selections                                | `paste_clipboard_before`                   |
-| `y`     | Join and yank selections to clipboard                                   | `yank_joined_to_clipboard`                 |
+| `y`     | Yank selections to clipboard                                            | `yank_to_clipboard`                        |
 | `Y`     | Yank main selection to clipboard                                        | `yank_main_selection_to_clipboard`         |
 | `R`     | Replace selections by clipboard contents                                | `replace_selections_with_clipboard`        |
 | `/`     | Global search in workspace folder                                       | `global_search`                            |
 | `?`     | Open command palette                                                    | `command_palette`                          |
-| `e`     | Reveal current file in explorer                                         | `reveal_current_file`                      |
-
 
 > 💡 Global search displays results in a fuzzy picker, use `Space + '` to bring it back up after opening a file.
 
@@ -336,6 +339,8 @@ These mappings are in the style of [vim-unimpaired](https://github.com/tpope/vim
 
 ## Insert mode
 
+Accessed by typing `i` in [normal mode](#normal-mode).
+
 Insert mode bindings are minimal by default. Helix is designed to
 be a modal editor, and this is reflected in the user experience and internal
 mechanics. Changes to the text are only saved for undos when
@@ -389,9 +394,11 @@ end = "no_op"
 
 ## Select / extend mode
 
+Accessed by typing `v` in [normal mode](#normal-mode).
+
 Select mode echoes Normal mode, but changes any movements to extend
 selections rather than replace them. Goto motions are also changed to
-extend, so that `vgl` for example extends the selection to the end of
+extend, so that `vgl`, for example, extends the selection to the end of
 the line.
 
 Search is also affected. By default, `n` and `N` will remove the current
@@ -413,6 +420,7 @@ Keys to use within picker. Remapping currently not supported.
 | `Home`                       | Go to first entry                                          |
 | `End`                        | Go to last entry                                           |
 | `Enter`                      | Open selected                                              |
+| `Alt-Enter`                  | Open selected in the background without closing the picker |
 | `Ctrl-s`                     | Open horizontally                                          |
 | `Ctrl-v`                     | Open vertically                                            |
 | `Ctrl-t`                     | Toggle preview                                             |
@@ -444,7 +452,3 @@ Keys to use within prompt, Remapping currently not supported.
 | `Tab`                                       | Select next completion item                                             |
 | `BackTab`                                   | Select previous completion item                                         |
 | `Enter`                                     | Open selected                                                           |
-
-# File explorer
-
-Press `?` to see keymaps. Remapping currently not supported.

book/src/languages.md

@@ -7,17 +7,20 @@ in `languages.toml` files.
 
 There are three possible locations for a `languages.toml` file:
 
-1. In the Helix source code, this lives in the
+1. In the Helix source code, which lives in the
    [Helix repository](https://github.com/helix-editor/helix/blob/master/languages.toml).
    It provides the default configurations for languages and language servers.
 
 2. In your [configuration directory](./configuration.md). This overrides values
-   from the built-in language configuration. For example to disable
+   from the built-in language configuration. For example, to disable
    auto-LSP-formatting in Rust:
 
    ```toml
    # in <config_dir>/helix/languages.toml
 
+   [language-server.mylang-lsp]
+   command = "mylang-lsp"
+
    [[language]]
    name = "rust"
    auto-format = false
@@ -41,8 +44,8 @@ injection-regex = "mylang"
 file-types = ["mylang", "myl"]
 comment-token = "#"
 indent = { tab-width = 2, unit = "  " }
-language-server = { command = "mylang-lsp", args = ["--stdio"], environment = { "ENV1" = "value1", "ENV2" = "value2" } }
 formatter = { command = "mylang-formatter" , args = ["--stdin"] }
+language-servers = [ "mylang-lsp" ]
 ```
 
 These configuration keys are available:
@@ -50,6 +53,7 @@ These configuration keys are available:
 | Key                   | Description                                                   |
 | ----                  | -----------                                                   |
 | `name`                | The name of the language                                      |
+| `language-id`         | The language-id for language servers, checkout the table at [TextDocumentItem](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentItem) for the right id |
 | `scope`               | A string like `source.js` that identifies the language. Currently, we strive to match the scope names used by popular TextMate grammars and by the Linguist library. Usually `source.<name>` or `text.<name>` in case of markup languages |
 | `injection-regex`     | regex pattern that will be tested against a language name in order to determine whether this language should be used for a potential [language injection][treesitter-language-injection] site. |
 | `file-types`          | The filetypes of the language, for example `["yml", "yaml"]`. See the file-type detection section below. |
@@ -59,11 +63,10 @@ These configuration keys are available:
 | `diagnostic-severity` | Minimal severity of diagnostic for it to be displayed. (Allowed values: `Error`, `Warning`, `Info`, `Hint`) |
 | `comment-token`       | The token to use as a comment-token                           |
 | `indent`              | The indent to use. Has sub keys `unit` (the text inserted into the document when indenting; usually set to N spaces or `"\t"` for tabs) and `tab-width` (the number of spaces rendered for a tab) |
-| `language-server`     | The Language Server to run. See the Language Server configuration section below. |
-| `config`              | Language Server configuration                                 |
+| `language-servers`    | The Language Servers used for this language. See below for more information in the section [Configuring Language Servers for a language](#configuring-language-servers-for-a-language)   |
 | `grammar`             | The tree-sitter grammar to use (defaults to the value of `name`) |
 | `formatter`           | The formatter for the language, it will take precedence over the lsp when defined. The formatter must be able to take the original file as input from stdin and write the formatted file to stdout |
-| `text-width`          |  Maximum line length. Used for the `:reflow` command and soft-wrapping if `soft-wrap.wrap_at_text_width` is set, defaults to `editor.text-width`   |
+| `text-width`          |  Maximum line length. Used for the `:reflow` command and soft-wrapping if `soft-wrap.wrap-at-text-width` is set, defaults to `editor.text-width`   |
 | `workspace-lsp-roots`     | Directories relative to the workspace root that are treated as LSP roots. Should only be set in `.helix/config.toml`. Overwrites the setting of the same name in `config.toml` if set. |
 
 ### File-type detection and the `file-types` key
@@ -92,31 +95,102 @@ with the following priorities:
    replaced at runtime with the appropriate path separator for the operating
    system, so this rule would match against `.git\config` files on Windows.
 
-### Language Server configuration
+## Language Server configuration
+
+Language servers are configured separately in the table `language-server` in the same file as the languages `languages.toml`
 
-The `language-server` field takes the following keys:
+For example:
+
+```toml
+[language-server.mylang-lsp]
+command = "mylang-lsp"
+args = ["--stdio"]
+config = { provideFormatter = true }
+environment = { "ENV1" = "value1", "ENV2" = "value2" }
+
+[language-server.efm-lsp-prettier]
+command = "efm-langserver"
+
+[language-server.efm-lsp-prettier.config]
+documentFormatting = true
+languages = { typescript = [ { formatCommand ="prettier --stdin-filepath ${INPUT}", formatStdin = true } ] }
+```
+
+These are the available options for a language server.
 
 | Key                   | Description                                                                              |
-| ---           | -----------                                                           |
-| `command`     | The name of the language server binary to execute. Binaries must be in `$PATH` |
+| ----                  | -----------                                                                              |
+| `command`             | The name or path of the language server binary to execute. Binaries must be in `$PATH`   |
 | `args`                | A list of arguments to pass to the language server binary                                |
+| `config`              | LSP initialization options                               |
 | `timeout`             | The maximum time a request to the language server may take, in seconds. Defaults to `20` |
-| `language-id` | The language name to pass to the language server. Some language servers support multiple languages and use this field to determine which one is being served in a buffer |
 | `environment`         | Any environment variables that will be used when starting the language server `{ "KEY1" = "Value1", "KEY2" = "Value2" }` |
 
-The top-level `config` field is used to configure the LSP initialization options. A `format`
-sub-table within `config` can be used to pass extra formatting options to
-[Document Formatting Requests](https://github.com/microsoft/language-server-protocol/blob/gh-pages/_specifications/specification-3-16.md#document-formatting-request--leftwards_arrow_with_hook).
-For example with typescript:
+A `format` sub-table within `config` can be used to pass extra formatting options to
+[Document Formatting Requests](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_formatting).
+For example, with typescript:
 
 ```toml
-[[language]]
-name = "typescript"
-auto-format = true
+[language-server.typescript-language-server]
 # pass format options according to https://github.com/typescript-language-server/typescript-language-server#workspacedidchangeconfiguration omitting the "[language].format." prefix.
 config = { format = { "semicolons" = "insert", "insertSpaceBeforeFunctionParenthesis" = true } }
 ```
 
+### Configuring Language Servers for a language
+
+The `language-servers` attribute in a language tells helix which language servers are used for this language.
+
+They have to be defined in the `[language-server]` table as described in the previous section.
+
+Different languages can use the same language server instance, e.g. `typescript-language-server` is used for javascript, jsx, tsx and typescript by default.
+
+In case multiple language servers are specified in the `language-servers` attribute of a `language`,
+it's often useful to only enable/disable certain language-server features for these language servers.
+
+As an example, `efm-lsp-prettier` of the previous example is used only with a formatting command `prettier`,
+so everything else should be handled by the `typescript-language-server` (which is configured by default).
+The language configuration for typescript could look like this:
+
+```toml
+[[language]]
+name = "typescript"
+language-servers = [ { name = "efm-lsp-prettier", only-features = [ "format" ] }, "typescript-language-server" ]
+```
+
+or equivalent:
+
+```toml
+[[language]]
+name = "typescript"
+language-servers = [ { name = "typescript-language-server", except-features = [ "format" ] }, "efm-lsp-prettier" ]
+```
+
+Each requested LSP feature is prioritized in the order of the `language-servers` array.
+For example, the first `goto-definition` supported language server (in this case `typescript-language-server`) will be taken for the relevant LSP request (command `goto_definition`).
+The features `diagnostics`, `code-action`, `completion`, `document-symbols` and `workspace-symbols` are an exception to that rule, as they are working for all language servers at the same time and are merged together, if enabled for the language.
+If no `except-features` or `only-features` is given, all features for the language server are enabled.
+If a language server itself doesn't support a feature, the next language server array entry will be tried (and so on).
+
+The list of supported features is:
+
+- `format`
+- `goto-definition`
+- `goto-declaration`
+- `goto-type-definition`
+- `goto-reference`
+- `goto-implementation`
+- `signature-help`
+- `hover`
+- `document-highlight`
+- `completion`
+- `code-action`
+- `workspace-command`
+- `document-symbols`
+- `workspace-symbols`
+- `diagnostics`
+- `rename-symbol`
+- `inlay-hints`
+
 ## Tree-sitter grammar configuration
 
 The source for a language's tree-sitter grammar is specified in a `[[grammar]]`

book/src/themes.md

@@ -70,6 +70,7 @@ over it and is merged into the default palette.
 
 | Color Name      |
 | ---             |
+| `default`       |
 | `black`         |
 | `red`           |
 | `green`         |
@@ -296,7 +297,7 @@ These scopes are used for theming the editor interface:
 | `ui.window`                       | Borderlines separating splits                                                                  |
 | `ui.help`                         | Description box for commands                                                                   |
 | `ui.text`                         | Command prompts, popup text, etc.                                                              |
-| `ui.text.focus`                   |                                                                                                |
+| `ui.text.focus`                   | The currently selected line in the picker                                                      |
 | `ui.text.inactive`                | Same as `ui.text` but when the text is inactive (e.g. suggestions)                             |
 | `ui.text.info`                    | The key: command text in `ui.popup.info` boxes                                                 |
 | `ui.virtual.ruler`                | Ruler columns (see the [`editor.rulers` config][editor-section])                               |
@@ -316,15 +317,14 @@ These scopes are used for theming the editor interface:
 | `ui.cursorline.secondary`         | The lines of any other cursors ([if cursorline is enabled][editor-section])                    |
 | `ui.cursorcolumn.primary`         | The column of the primary cursor ([if cursorcolumn is enabled][editor-section])                |
 | `ui.cursorcolumn.secondary`       | The columns of any other cursors ([if cursorcolumn is enabled][editor-section])                |
-| `warning`                         | Diagnostics warning icon (gutter, statusline, and diagnostic pickers)                          |
-| `error`                           | Diagnostics error icon (gutter, statusline, and diagnostic pickers)                            |
-| `info`                            | Diagnostics info icon (gutter, statusline, and diagnostic pickers)                             |
-| `hint`                            | Diagnostics hint icon (gutter, statusline, and diagnostic pickers)                             |
+| `warning`                         | Diagnostics warning (gutter)                                                                   |
+| `error`                           | Diagnostics error (gutter)                                                                     |
+| `info`                            | Diagnostics info (gutter)                                                                      |
+| `hint`                            | Diagnostics hint (gutter)                                                                      |
 | `diagnostic`                      | Diagnostics fallback style (editing area)                                                      |
 | `diagnostic.hint`                 | Diagnostics hint (editing area)                                                                |
 | `diagnostic.info`                 | Diagnostics info (editing area)                                                                |
 | `diagnostic.warning`              | Diagnostics warning (editing area)                                                             |
 | `diagnostic.error`                | Diagnostics error (editing area)                                                               |
-| `symbolkind`                      | Symbol kind icons (symbol picker)                                                              |
 
 [editor-section]: ./configuration.md#editor-section

book/src/usage.md

@@ -37,19 +37,35 @@ If a register is selected before invoking a change or delete command, the select
 - `"hc` - Store the selection in register `h` and then change it (delete and enter insert mode).
 - `"md` - Store the selection in register `m` and delete it.
 
-### Special registers
+### Default registers
+
+Commands that use registers, like yank (`y`), use a default register if none is specified.
+These registers are used as defaults:
 
 | Register character | Contains              |
 | ---                | ---                   |
 | `/`                | Last search           |
 | `:`                | Last executed command |
 | `"`                | Last yanked text      |
-| `_`                | Black hole            |
+| `@`                | Last recorded macro   |
+
+### Special registers
+
+Some registers have special behavior when read from and written to.
 
-The system clipboard is not directly supported by a special register. Instead, special commands and keybindings are provided. Refer to the
-[key map](keymap.md#space-mode) for more details.
+| Register character | When read              | When written             |
+| ---                | ---                    | ---                      |
+| `_`                | No values are returned | All values are discarded |
+| `#`                | Selection indices (first selection is `1`, second is `2`, etc.) | This register is not writable |
+| `.`                | Contents of the current selections | This register is not writable |
+| `%`                | Name of the current file | This register is not writable |
+| `*`                | Reads from the system clipboard | Joins and yanks to the system clipboard |
+| `+`                | Reads from the primary clipboard | Joins and yanks to the primary clipboard |
 
-The black hole register is a no-op register, meaning that no data will be read or written to it.
+When yanking multiple selections to the clipboard registers, the selections
+are joined with newlines. Pasting from these registers will paste multiple
+selections if the clipboard was last yanked to by the Helix session. Otherwise
+the clipboard contents are pasted as one selection.
 
 ## Surround
 
@@ -96,13 +112,13 @@ function or block of code.
 | `(`, `[`, `'`, etc.    | Specified surround pairs |
 | `m`                    | The closest surround pair    |
 | `f`                    | Function                 |
-| `c`                    | Class                    |
+| `t`                    | Type (or Class)          |
 | `a`                    | Argument/parameter       |
-| `o`                    | Comment                  |
-| `t`                    | Test                     |
+| `c`                    | Comment                  |
+| `T`                    | Test                     |
 | `g`                    | Change                   |
 
-> 💡 `f`, `c`, etc. need a tree-sitter grammar active for the current
+> 💡 `f`, `t`, etc. need a tree-sitter grammar active for the current
 document and a special tree-sitter query file to work properly. [Only
 some grammars][lang-support] currently have the query file implemented.
 Contributions are welcome!
@@ -112,7 +128,7 @@ Contributions are welcome!
 Navigating between functions, classes, parameters, and other elements is
 possible using tree-sitter and textobject queries. For
 example to move to the next function use `]f`, to move to previous
-class use `[c`, and so on.
+type use `[t`, and so on.
 
 ![Tree-sitter-nav-demo][tree-sitter-nav-demo]
 

book/theme/book.js

@@ -1,660 +0,0 @@
-"use strict";
-
-// Fix back button cache problem
-window.onunload = function () { };
-
-// Global variable, shared between modules
-function playground_text(playground) {
-    let code_block = playground.querySelector("code");
-
-    if (window.ace && code_block.classList.contains("editable")) {
-        let editor = window.ace.edit(code_block);
-        return editor.getValue();
-    } else {
-        return code_block.textContent;
-    }
-}
-
-(function codeSnippets() {
-    function fetch_with_timeout(url, options, timeout = 6000) {
-        return Promise.race([
-            fetch(url, options),
-            new Promise((_, reject) => setTimeout(() => reject(new Error('timeout')), timeout))
-        ]);
-    }
-
-    var playgrounds = Array.from(document.querySelectorAll(".playground"));
-    if (playgrounds.length > 0) {
-        fetch_with_timeout("https://play.rust-lang.org/meta/crates", {
-            headers: {
-                'Content-Type': "application/json",
-            },
-            method: 'POST',
-            mode: 'cors',
-        })
-        .then(response => response.json())
-        .then(response => {
-            // get list of crates available in the rust playground
-            let playground_crates = response.crates.map(item => item["id"]);
-            playgrounds.forEach(block => handle_crate_list_update(block, playground_crates));
-        });
-    }
-
-    function handle_crate_list_update(playground_block, playground_crates) {
-        // update the play buttons after receiving the response
-        update_play_button(playground_block, playground_crates);
-
-        // and install on change listener to dynamically update ACE editors
-        if (window.ace) {
-            let code_block = playground_block.querySelector("code");
-            if (code_block.classList.contains("editable")) {
-                let editor = window.ace.edit(code_block);
-                editor.addEventListener("change", function (e) {
-                    update_play_button(playground_block, playground_crates);
-                });
-                // add Ctrl-Enter command to execute rust code
-                editor.commands.addCommand({
-                    name: "run",
-                    bindKey: {
-                        win: "Ctrl-Enter",
-                        mac: "Ctrl-Enter"
-                    },
-                    exec: _editor => run_rust_code(playground_block)
-                });
-            }
-        }
-    }
-
-    // updates the visibility of play button based on `no_run` class and
-    // used crates vs ones available on http://play.rust-lang.org
-    function update_play_button(pre_block, playground_crates) {
-        var play_button = pre_block.querySelector(".play-button");
-
-        // skip if code is `no_run`
-        if (pre_block.querySelector('code').classList.contains("no_run")) {
-            play_button.classList.add("hidden");
-            return;
-        }
-
-        // get list of `extern crate`'s from snippet
-        var txt = playground_text(pre_block);
-        var re = /extern\s+crate\s+([a-zA-Z_0-9]+)\s*;/g;
-        var snippet_crates = [];
-        var item;
-        while (item = re.exec(txt)) {
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book/theme/css/chrome.css

@@ -1,499 +0,0 @@
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-.nav-wrapper {
-    margin-top: 50px;
-    display: none;
-}
-
-.mobile-nav-chapters {
-    font-size: 2.5em;
-    text-align: center;
-    text-decoration: none;
-    width: 90px;
-    border-radius: 5px;
-    background-color: var(--sidebar-bg);
-}
-
-.previous {
-    float: left;
-}
-
-.next {
-    float: right;
-    right: var(--page-padding);
-}
-
-@media only screen and (max-width: 1080px) {
-    .nav-wide-wrapper { display: none; }
-    .nav-wrapper { display: block; }
-}
-
-@media only screen and (max-width: 1380px) {
-    .sidebar-visible .nav-wide-wrapper { display: none; }
-    .sidebar-visible .nav-wrapper { display: block; }
-}
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-/* Inline code */
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-:not(pre) > .hljs {
-    display: inline;
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-:not(pre):not(a):not(td):not(p) > .hljs {
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-a:hover > .hljs {
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-pre {
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-}
-pre > .buttons {
-    position: absolute;
-    z-index: 100;
-    right: 5px;
-    top: 5px;
-
-    color: var(--sidebar-fg);
-    cursor: pointer;
-}
-pre > .buttons :hover {
-    color: var(--sidebar-active);
-}
-pre > .buttons i {
-    margin-left: 8px;
-}
-pre > .buttons button {
-    color: inherit;
-    background: transparent;
-    border: none;
-    cursor: inherit;
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-pre > .result {
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-/* Search */
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-#searchresults a {
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-}
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-mark {
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-    margin: 0 -3px -1px -3px;
-    background-color: var(--search-mark-bg);
-    transition: background-color 300ms linear;
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-mark.fade-out {
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-    cursor: auto;
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-.searchbar-outer {
-    margin-left: auto;
-    margin-right: auto;
-    max-width: var(--content-max-width);
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-#searchbar {
-    width: 100%;
-    margin: 5px auto 0px auto;
-    padding: 10px 16px;
-    transition: box-shadow 300ms ease-in-out;
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-#searchbar:focus,
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-.searchresults-header {
-    font-weight: bold;
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-.searchresults-outer {
-    margin-left: auto;
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-ul#searchresults {
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-ul#searchresults li {
-    margin: 10px 0px;
-    padding: 2px;
-    border-radius: 2px;
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-ul#searchresults li.focus {
-    background-color: var(--searchresults-li-bg);
-}
-ul#searchresults span.teaser {
-    display: block;
-    clear: both;
-    margin: 5px 0 0 20px;
-    font-size: 0.8em;
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-/* Sidebar */
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-.sidebar {
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-    left: 0;
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-    color: var(--sidebar-fg);
-}
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-    -moz-user-select: none;
-    -webkit-user-select: none;
-    -ms-user-select: none;
-    user-select: none;
-}
-.js:not(.sidebar-resizing) .sidebar {
-    transition: transform 0.3s; /* Animation: slide away */
-}
-.sidebar code {
-    line-height: 2em;
-}
-.sidebar .sidebar-scrollbox {
-    overflow-y: auto;
-    position: absolute;
-    top: 0;
-    bottom: 0;
-    left: 0;
-    right: 0;
-}
-.sidebar .sidebar-resize-handle {
-    position: absolute;
-    cursor: col-resize;
-    width: 0;
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-    cursor: col-resize;
-    width: 5px;
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-    background: var(--sidebar-bg);
-}
-.sidebar::-webkit-scrollbar-thumb {
-    background: var(--scrollbar);
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-.sidebar-visible .page-wrapper {
-    transform: translateX(var(--sidebar-width));
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-.chapter {
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-    margin: .25rem 0;
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-.chapter ol {
-    width: 100%;
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-.chapter li {
-    display: flex;
-    color: var(--sidebar-non-existent);
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-.chapter li a {
-    display: block;
-    text-decoration: none;
-    color: var(--sidebar-fg);
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-.chapter li a:hover {
-    color: var(--sidebar-active);
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-.chapter li a.active {
-    color: var(--sidebar-active);
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-.chapter li > a.toggle {
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-    padding: 0 10px;
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-.chapter li > a.toggle div {
-    transition: transform 0.5s;
-}
-
-/* collapse the section */
-.chapter li:not(.expanded) + li > ol {
-    display: none;
-}
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-.chapter li.chapter-item {
-    padding: 1rem 1.5rem;
-}
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-.chapter .section li.chapter-item {
-    padding: .5rem .5rem 0 .5rem;
-}
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-.chapter li.expanded > a.toggle div {
-    transform: rotate(90deg);
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-.spacer {
-    width: 100%;
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-}
-.chapter .spacer {
-    background-color: var(--sidebar-spacer);
-}
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-    .chapter li a { padding: 5px 0; }
-    .spacer { margin: 10px 0; }
-}
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-.section {
-    list-style: none outside none;
-    padding-left: 2rem;
-    line-height: 1.9em;
-}
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-/* Theme Menu Popup */
-
-.theme-popup {
-    position: absolute;
-    left: 10px;
-    top: var(--menu-bar-height);
-    z-index: 1000;
-    border-radius: 4px;
-    font-size: 0.7em;
-    color: var(--fg);
-    background: var(--theme-popup-bg);
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-    margin: 0;
-    padding: 0;
-    list-style: none;
-    display: none;
-}
-.theme-popup .default {
-    color: var(--icons);
-}
-.theme-popup .theme {
-    width: 100%;
-    border: 0;
-    margin: 0;
-    padding: 2px 10px;
-    line-height: 25px;
-    white-space: nowrap;
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-    color: inherit;
-    background: inherit;
-    font-size: inherit;
-}
-.theme-popup .theme:hover {
-    background-color: var(--theme-hover);
-}
-.theme-popup .theme:hover:first-child,
-.theme-popup .theme:hover:last-child {
-    border-top-left-radius: inherit;
-    border-top-right-radius: inherit;
-}

book/theme/css/general.css

@@ -1,233 +0,0 @@
-/* Base styles and content styles */
-
-@import 'variables.css';
-
-:root {
-    /* Browser default font-size is 16px, this way 1 rem = 10px */
-    font-size: 62.5%;
-}
-
-/* TODO: replace with self hosted fonts */
-
-html {
-    font-family: "Inter", sans-serif;
-    color: var(--fg);
-    background-color: var(--bg);
-    text-size-adjust: none;
-}
-
-/* @supports (font-variation-settings: normal) { */
-/*   html { font-family: 'Inter var', sans-serif; } */
-/* } */
-
-body {
-    margin: 0;
-    font-size: 1.6rem;
-    overflow-x: hidden;
-}
-
-code {
-    font-family: "Source Code Pro", Consolas, "Ubuntu Mono", Menlo, "DejaVu Sans Mono", monospace, monospace !important;
-    font-size: 0.875em; /* please adjust the ace font size accordingly in editor.js */
-}
-
-/* Don't change font size in headers. */
-h1 code, h2 code, h3 code, h4 code, h5 code, h6 code {
-    font-size: unset;
-}
-
-.left { float: left; }
-.right { float: right; }
-.boring { opacity: 0.6; }
-.hide-boring .boring { display: none; }
-.hidden { display: none !important; }
-
-h2, h3 { margin-top: 2.5em; }
-h4, h5 { margin-top: 2em; }
-
-.header + .header h3,
-.header + .header h4,
-.header + .header h5 {
-    margin-top: 1em;
-}
-
-h1:target::before,
-h2:target::before,
-h3:target::before,
-h4:target::before,
-h5:target::before,
-h6:target::before {
-    display: inline-block;
-    content: "»";
-    margin-left: -30px;
-    width: 30px;
-}
-
-/* This is broken on Safari as of version 14, but is fixed
-   in Safari Technology Preview 117 which I think will be Safari 14.2.
-   https://bugs.webkit.org/show_bug.cgi?id=218076
-*/
-:target {
-    scroll-margin-top: calc(var(--menu-bar-height) + 0.5em);
-}
-
-.page {
-    outline: 0;
-    padding: 0 var(--page-padding);
-    margin-top: calc(0px - var(--menu-bar-height)); /* Compensate for the #menu-bar-hover-placeholder */
-}
-.page-wrapper {
-    box-sizing: border-box;
-}
-.js:not(.sidebar-resizing) .page-wrapper {
-    transition: margin-left 0.3s ease, transform 0.3s ease; /* Animation: slide away */
-}
-
-.content {
-    overflow-y: auto;
-    padding: 0 15px;
-    padding-bottom: 50px;
-}
-.content main {
-    margin-left: auto;
-    margin-right: auto;
-    max-width: var(--content-max-width);
-}
-
-
-/* 2 1.75 1.5 1.25 1 .875 */
-
-.content h1 { font-size: 2em }
-.content h2 { font-size: 1.75em }
-.content h3 { font-size: 1.5em }
-.content h4 { font-size: 1.25em }
-.content h5 { font-size: 1em }
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-.content h1, .content h2, .content h3, .content h4 {
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-    margin-top: 1.275em;
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-    margin-bottom: .5rem;
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-table {
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-table td {
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-table thead {
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-table thead td {
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-table thead th {
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-    font-weight: 500;
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-}
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-    border-bottom: 2px var(--table-border-color) solid;
-}
-table tbody tr {
-    border-bottom: 1px var(--table-border-line) solid;
-}
-/* Alternate background colors for rows */
-table tbody tr:nth-child(2n) {
-    /* background: var(--table-alternate-bg); */
-}
-
-
-blockquote {
-    margin: 1.5rem 0;
-    padding: 1rem 1.5rem;
-    color: var(--fg);
-    opacity: .9;
-    background-color: var(--quote-bg);
-    border-left: 4px solid var(--quote-border);
-}
-blockquote *:last-child {
-  margin-bottom: 0;
-}
-
-
-:not(.footnote-definition) + .footnote-definition,
-.footnote-definition + :not(.footnote-definition) {
-    margin-top: 2em;
-}
-.footnote-definition {
-    font-size: 0.9em;
-    margin: 0.5em 0;
-}
-.footnote-definition p {
-    display: inline;
-}
-
-.tooltiptext {
-    position: absolute;
-    visibility: hidden;
-    color: #fff;
-    background-color: #333;
-    transform: translateX(-50%); /* Center by moving tooltip 50% of its width left */
-    left: -8px; /* Half of the width of the icon */
-    top: -35px;
-    font-size: 0.8em;
-    text-align: center;
-    border-radius: 6px;
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-    margin: 5px;
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-}
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-.chapter li.part-title {
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-    margin: 5px 0px;
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-    font-style: italic;
-}

book/theme/css/print.css

@@ -1,54 +0,0 @@
-
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-#menu-bar,
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-    display: none;
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-#page-wrapper.page-wrapper {
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-.page {
-    overflow-y: initial;
-}
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-code {
-    background-color: #666666;
-    border-radius: 5px;
-
-    /* Force background to be printed in Chrome */
-    -webkit-print-color-adjust: exact;
-}
-
-pre > .buttons {
-    z-index: 2;
-}
-
-a, a:visited, a:active, a:hover {
-    color: #4183c4;
-    text-decoration: none;
-}
-
-h1, h2, h3, h4, h5, h6 {
-    page-break-inside: avoid;
-    page-break-after: avoid;
-}
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-    page-break-inside: avoid;
-    white-space: pre-wrap;
-}
-
-.fa {
-    display: none !important;
-}

book/theme/css/variables.css

@@ -1,411 +0,0 @@
-
-/* Globals */
-
-:root {
-    --sidebar-width: 300px;
-    --page-padding: 15px;
-    --content-max-width: 750px;
-    --menu-bar-height: 50px;
-}
-
-/* Themes */
-
-.ayu {
-    --bg: hsl(210, 25%, 8%);
-    --fg: #c5c5c5;
-
-    --sidebar-bg: #14191f;
-    --sidebar-fg: #c8c9db;
-    --sidebar-non-existent: #5c6773;
-    --sidebar-active: #ffb454;
-    --sidebar-spacer: #2d334f;
-
-    --scrollbar: var(--sidebar-fg);
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-    --icons: #737480;
-    --icons-hover: #b7b9cc;
-
-    --links: #0096cf;
-
-    --inline-code-color: #ffb454;
-
-    --theme-popup-bg: #14191f;
-    --theme-popup-border: #5c6773;
-    --theme-hover: #191f26;
-
-    --quote-bg: hsl(226, 15%, 17%);
-    --quote-border: hsl(226, 15%, 22%);
-
-    --table-border-color: hsl(210, 25%, 13%);
-    --table-header-bg: hsl(210, 25%, 28%);
-    --table-alternate-bg: hsl(210, 25%, 11%);
-
-    --searchbar-border-color: #848484;
-    --searchbar-bg: #424242;
-    --searchbar-fg: #fff;
-    --searchbar-shadow-color: #d4c89f;
-    --searchresults-header-fg: #666;
-    --searchresults-border-color: #888;
-    --searchresults-li-bg: #252932;
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-    --hljs-background: #191f26;
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-    --fg: #98a3ad;
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-    --sidebar-bg: #292c2f;
-    --sidebar-fg: #a1adb8;
-    --sidebar-non-existent: #505254;
-    --sidebar-active: #3473ad;
-    --sidebar-spacer: #393939;
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-    --scrollbar: var(--sidebar-fg);
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-    --icons: #43484d;
-    --icons-hover: #b3c0cc;
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-    --links: #2b79a2;
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-    --inline-code-color: #c5c8c6;
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-    --theme-popup-bg: #141617;
-    --theme-popup-border: #43484d;
-    --theme-hover: #1f2124;
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-    --quote-bg: hsl(234, 21%, 18%);
-    --quote-border: hsl(234, 21%, 23%);
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-    --table-border-color: hsl(200, 7%, 13%);
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-    --searchbar-border-color: #aaa;
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-    --sidebar-bg: #fafafa;
-    --sidebar-fg: hsl(0, 0%, 0%);
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-    --scrollbar: #8F8F8F;
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-    --inline-code-color: #301900;
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-    --theme-popup-bg: #fafafa;
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-    --sidebar-bg: #282d3f;
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-    --table-alternate-bg: hsl(226, 23%, 14%);
-
-    --searchbar-border-color: #aaa;
-    --searchbar-bg: #aeaec6;
-    --searchbar-fg: #000;
-    --searchbar-shadow-color: #aaa;
-    --searchresults-header-fg: #5f5f71;
-    --searchresults-border-color: #5c5c68;
-    --searchresults-li-bg: #242430;
-    --search-mark-bg: #a2cff5;
-
-    --hljs-background: #969896;
-    --hljs-color: #cc6666;
-    --hljs-quote: #de935f;
-    --hljs-variable: #f0c674;
-    --hljs-type: #b5bd68;
-    --hljs-title: #8abeb7;
-    --hljs-symbol: #81a2be;
-    --hljs-selector-tag: #b294bb;
-    --hljs-selector-tag: #1d1f21;
-    --hljs-selector-tag: #c5c8c6;
-    --hljs-selector-tag: #718c00;
-    --hljs-selector-tag: #c82829;
-}
-
-.rust {
-    --bg: hsl(60, 9%, 87%);
-    --fg: #262625;
-
-    --sidebar-bg: #3b2e2a;
-    --sidebar-fg: #c8c9db;
-    --sidebar-non-existent: #505254;
-    --sidebar-active: #e69f67;
-    --sidebar-spacer: #45373a;
-
-    --scrollbar: var(--sidebar-fg);
-
-    --icons: #737480;
-    --icons-hover: #262625;
-
-    --links: #2b79a2;
-
-    --inline-code-color: #6e6b5e;
-
-    --theme-popup-bg: #e1e1db;
-    --theme-popup-border: #b38f6b;
-    --theme-hover: #99908a;
-
-    --quote-bg: hsl(60, 5%, 75%);
-    --quote-border: hsl(60, 5%, 70%);
-
-    --table-border-color: hsl(60, 9%, 82%);
-    --table-header-bg: #b3a497;
-    --table-alternate-bg: hsl(60, 9%, 84%);
-
-    --searchbar-border-color: #aaa;
-    --searchbar-bg: #fafafa;
-    --searchbar-fg: #000;
-    --searchbar-shadow-color: #aaa;
-    --searchresults-header-fg: #666;
-    --searchresults-border-color: #888;
-    --searchresults-li-bg: #dec2a2;
-    --search-mark-bg: #e69f67;
-    --hljs-background: #f6f7f6;
-    --hljs-color: #000;
-    --hljs-quote: #575757;
-    --hljs-variable: #d70025;
-    --hljs-type: #b21e00;
-    --hljs-title: #0030f2;
-    --hljs-symbol: #008200;
-    --hljs-selector-tag: #9d00ec;
-}
-
-@media (prefers-color-scheme: dark) {
-    .light.no-js {
-        --bg: hsl(200, 7%, 8%);
-        --fg: #98a3ad;
-
-        --sidebar-bg: #292c2f;
-        --sidebar-fg: #a1adb8;
-        --sidebar-non-existent: #505254;
-        --sidebar-active: #3473ad;
-        --sidebar-spacer: #393939;
-
-        --scrollbar: var(--sidebar-fg);
-
-        --icons: #43484d;
-        --icons-hover: #b3c0cc;
-
-        --links: #2b79a2;
-
-        --inline-code-color: #c5c8c6;
-
-        --theme-popup-bg: #141617;
-        --theme-popup-border: #43484d;
-        --theme-hover: #1f2124;
-
-        --quote-bg: hsl(234, 21%, 18%);
-        --quote-border: hsl(234, 21%, 23%);
-
-        --table-border-color: hsl(200, 7%, 13%);
-        --table-header-bg: hsl(200, 7%, 28%);
-        --table-alternate-bg: hsl(200, 7%, 11%);
-
-        --searchbar-border-color: #aaa;
-        --searchbar-bg: #b7b7b7;
-        --searchbar-fg: #000;
-        --searchbar-shadow-color: #aaa;
-        --searchresults-header-fg: #666;
-        --searchresults-border-color: #98a3ad;
-        --searchresults-li-bg: #2b2b2f;
-        --search-mark-bg: #355c7d;
-    }
-}
-
-.colibri {
-    --bg: #3b224c;
-    --fg: #bcbdd0;
-    --heading-fg: #fff;
-
-    --sidebar-bg: #281733;
-    --sidebar-fg: #c8c9db;
-    --sidebar-non-existent: #505274;
-    --sidebar-active: #a4a0e8;
-    --sidebar-spacer: #2d334f;
-
-    --scrollbar: var(--sidebar-fg);
-
-    --icons: #737480;
-    --icons-hover: #b7b9cc;
-
-    /* --links: #a4a0e8; */
-    --links: #ECCDBA;
-
-    --inline-code-color: hsl(48.7, 7.8%, 70%);
-
-    --theme-popup-bg: #161923;
-    --theme-popup-border: #737480;
-    --theme-hover: rgba(0,0,0, .2);
-
-    --quote-bg: #281733;
-    --quote-border: hsl(226, 15%, 22%);
-
-    --table-border-color: hsl(226, 23%, 76%);
-    --table-header-bg: hsla(226, 23%, 31%, 0);
-    --table-alternate-bg: hsl(226, 23%, 14%);
-    --table-border-line: hsla(201deg, 20%, 92%, 0.2);
-
-    --searchbar-border-color: #aaa;
-    --searchbar-bg: #aeaec6;
-    --searchbar-fg: #000;
-    --searchbar-shadow-color: #aaa;
-    --searchresults-header-fg: #5f5f71;
-    --searchresults-border-color: #5c5c68;
-    --searchresults-li-bg: #242430;
-    --search-mark-bg: #acff5;
-    --hljs-background: #2f1e2e;
-    --hljs-color: #a39e9b;
-    --hljs-quote: #8d8687;
-    --hljs-variable: #ef6155;
-    --hljs-type: #f99b15;
-    --hljs-title: #fec418;
-    --hljs-symbol: #48b685;
-    --hljs-selector-tag: #815ba4;
-}
-
-.colibri {
-/*
-    --bg: #ffffff;
-    --fg: #452859;
-    --fg: #5a5977;
-    --heading-fg: #281733;
-
-    --sidebar-bg: #281733;
-    --sidebar-fg: #c8c9db;
-    --sidebar-non-existent: #505274;
-    --sidebar-active: #a4a0e8;
-    --sidebar-spacer: #2d334f;
-
-    --scrollbar: var(--sidebar-fg);
-
-    --icons: #737480;
-    --icons-hover: #b7b9cc;
-
-    --links: #6F44F0;
-
-    --inline-code-color: #a39e9b;
-
-    --theme-popup-bg: #161923;
-    --theme-popup-border: #737480;
-    --theme-hover: rgba(0,0,0, .2);
-
-    --quote-bg: rgba(0, 0, 0, 0);
-    --quote-border: hsl(226, 15%, 75%);
-
-    --table-border-color: #5a5977;
-    --table-border-color: hsl(201deg 10% 67%);
-    --table-header-bg: hsl(0, 0%, 100%);
-    --table-alternate-bg: hsl(0, 0%, 97%);
-    --table-border-line: hsl(201deg, 20%, 92%);
-
-    --searchbar-border-color: #aaa;
-    --searchbar-bg: #aeaec6;
-    --searchbar-fg: #000;
-    --searchbar-shadow-color: #aaa;
-    --searchresults-header-fg: #5f5f71;
-    --searchresults-border-color: #5c5c68;
-    --searchresults-li-bg: #242430;
-    --search-mark-bg: #a2cff5;
-    --hljs-background: #TODO;
-    --hljs-color: #TODO;
-    --hljs-quote: #TODO;
-    --hljs-variable: #TODO;
-    --hljs-type: #TODO;
-    --hljs-title: #TODO;
-    --hljs-symbol: #TODO;
-    --hljs-selector-tag: #TODO;
-*/
-}

book/theme/highlight.css

@@ -1,56 +0,0 @@
-pre code.hljs {
- display:block;
- overflow-x:auto;
- padding:1em
-}
-code.hljs {
- padding:3px 5px
-}
-.hljs {
- background: var(--hljs-background);
- color: var(--hljs-color);
-}
-.hljs-comment,
-.hljs-quote {
- color: var(--hljs-quote)
-}
-.hljs-link,
-.hljs-meta,
-.hljs-name,
-.hljs-regexp,
-.hljs-selector-class,
-.hljs-selector-id,
-.hljs-tag,
-.hljs-template-variable,
-.hljs-variable {
- color: var(--hljs-variable)
-}
-.hljs-built_in,
-.hljs-deletion,
-.hljs-literal,
-.hljs-number,
-.hljs-params,
-.hljs-type {
- color: var(--hljs-type)
-}
-.hljs-attribute,
-.hljs-section,
-.hljs-title {
- color: var(--hljs-title)
-}
-.hljs-addition,
-.hljs-bullet,
-.hljs-string,
-.hljs-symbol {
- color: var(--hljs-symbol)
-}
-.hljs-keyword,
-.hljs-selector-tag {
- color: var(--hljs-selector-tag)
-}
-.hljs-emphasis {
- font-style:italic
-}
-.hljs-strong {
- font-weight:700
-}

book/theme/index.hbs

@@ -15,7 +15,6 @@
         <!-- Custom HTML head -->
         {{> head}}
 
-        <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
         <meta name="description" content="{{ description }}">
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <meta name="theme-color" content="#ffffff" />
@@ -53,18 +52,19 @@
 
         {{#if mathjax_support}}
         <!-- MathJax -->
-        <script async type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+        <script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
         {{/if}}
     </head>
     <body>
+    <div id="body-container">
         <!-- Provide site root to javascript -->
-        <script type="text/javascript">
+        <script>
             var path_to_root = "{{ path_to_root }}";
             var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "{{ preferred_dark_theme }}" : "{{ default_theme }}";
         </script>
 
         <!-- Work around some values being stored in localStorage wrapped in quotes -->
-        <script type="text/javascript">
+        <script>
             try {
                 var theme = localStorage.getItem('mdbook-theme');
                 var sidebar = localStorage.getItem('mdbook-sidebar');
@@ -80,7 +80,7 @@
         </script>
 
         <!-- Set the theme before any content is loaded, prevents flash -->
-        <script type="text/javascript">
+        <script>
             var theme;
             try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
             if (theme === null || theme === undefined) { theme = default_theme; }
@@ -92,12 +92,14 @@
         </script>
 
         <!-- Hide / unhide sidebar before it is displayed -->
-        <script type="text/javascript">
+        <script>
             var html = document.querySelector('html');
-            var sidebar = 'hidden';
+            var sidebar = null;
             if (document.body.clientWidth >= 1080) {
                 try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
                 sidebar = sidebar || 'visible';
+            } else {
+                sidebar = 'hidden';
             }
             html.classList.remove('sidebar-visible');
             html.classList.add("sidebar-" + sidebar);
@@ -110,12 +112,34 @@
             <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
         </nav>
 
+        <!-- Track and set sidebar scroll position -->
+        <script>
+            var sidebarScrollbox = document.querySelector('#sidebar .sidebar-scrollbox');
+            sidebarScrollbox.addEventListener('click', function(e) {
+                if (e.target.tagName === 'A') {
+                    sessionStorage.setItem('sidebar-scroll', sidebarScrollbox.scrollTop);
+                }
+            }, { passive: true });
+            var sidebarScrollTop = sessionStorage.getItem('sidebar-scroll');
+            sessionStorage.removeItem('sidebar-scroll');
+            if (sidebarScrollTop) {
+                // preserve sidebar scroll position when navigating via links within sidebar
+                sidebarScrollbox.scrollTop = sidebarScrollTop;
+            } else {
+                // scroll sidebar to current active section when navigating via "next/previous chapter" buttons
+                var activeSection = document.querySelector('#sidebar .active');
+                if (activeSection) {
+                    activeSection.scrollIntoView({ block: 'center' });
+                }
+            }
+        </script>
+
         <div id="page-wrapper" class="page-wrapper">
 
             <div class="page">
                 {{> header}}
                 <div id="menu-bar-hover-placeholder"></div>
-                <div id="menu-bar" class="menu-bar sticky bordered">
+                <div id="menu-bar" class="menu-bar sticky">
                     <div class="left-buttons">
                         <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
                             <i class="fa fa-bars"></i>
@@ -124,12 +148,12 @@
                             <i class="fa fa-paint-brush"></i>
                         </button>
                         <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
-                            <li role="none"><button role="menuitem" class="theme" id="light">{{ theme_option "Light" }}</button></li>
-                            <li role="none"><button role="menuitem" class="theme" id="rust">{{ theme_option "Rust" }}</button></li>
-                            <li role="none"><button role="menuitem" class="theme" id="coal">{{ theme_option "Coal" }}</button></li>
-                            <li role="none"><button role="menuitem" class="theme" id="navy">{{ theme_option "Navy" }}</button></li>
-                            <li role="none"><button role="menuitem" class="theme" id="ayu">{{ theme_option "Ayu" }}</button></li>
-                            <li role="none"><button role="menuitem" class="theme" id="colibri">{{ theme_option "Colibri" }}</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="light">Light</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="colibri">Colibri</button></li>
                         </ul>
                         {{#if search_enabled}}
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
@@ -151,13 +175,19 @@
                             <i id="git-repository-button" class="fa {{git_repository_icon}}"></i>
                         </a>
                         {{/if}}
+                        {{#if git_repository_edit_url}}
+                        <a href="{{git_repository_edit_url}}" title="Suggest an edit" aria-label="Suggest an edit">
+                            <i id="git-edit-button" class="fa fa-edit"></i>
+                        </a>
+                        {{/if}}
+
                     </div>
                 </div>
 
                 {{#if search_enabled}}
                 <div id="search-wrapper" class="hidden">
                     <form id="searchbar-outer" class="searchbar-outer">
-                        <input type="search" name="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
+                        <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
                     </form>
                     <div id="searchresults-outer" class="searchresults-outer hidden">
                         <div id="searchresults-header" class="searchresults-header"></div>
@@ -168,7 +198,7 @@
                 {{/if}}
 
                 <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
-                <script type="text/javascript">
+                <script>
                     document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
                     document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
                     Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
@@ -216,10 +246,12 @@
 
         </div>
 
-        {{#if livereload}}
+        {{#if live_reload_endpoint}}
         <!-- Livereload script (if served using the cli tool) -->
-        <script type="text/javascript">
-            var socket = new WebSocket("{{{livereload}}}");
+        <script>
+            const wsProtocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
+            const wsAddress = wsProtocol + "//" + location.host + "/" + "{{{live_reload_endpoint}}}";
+            const socket = new WebSocket(wsAddress);
             socket.onmessage = function (event) {
                 if (event.data === "reload") {
                     socket.close();
@@ -235,7 +267,7 @@
 
         {{#if google_analytics}}
         <!-- Google Analytics Tag -->
-        <script type="text/javascript">
+        <script>
             var localAddrs = ["localhost", "127.0.0.1", ""];
 
             // make sure we don't activate google analytics if the developer is
@@ -253,43 +285,43 @@
         {{/if}}
 
         {{#if playground_line_numbers}}
-        <script type="text/javascript">
+        <script>
             window.playground_line_numbers = true;
         </script>
         {{/if}}
 
         {{#if playground_copyable}}
-        <script type="text/javascript">
+        <script>
             window.playground_copyable = true;
         </script>
         {{/if}}
 
         {{#if playground_js}}
-        <script src="{{ path_to_root }}ace.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}editor.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}mode-rust.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}theme-dawn.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}theme-tomorrow_night.js" type="text/javascript" charset="utf-8"></script>
+        <script src="{{ path_to_root }}ace.js"></script>
+        <script src="{{ path_to_root }}editor.js"></script>
+        <script src="{{ path_to_root }}mode-rust.js"></script>
+        <script src="{{ path_to_root }}theme-dawn.js"></script>
+        <script src="{{ path_to_root }}theme-tomorrow_night.js"></script>
         {{/if}}
 
         {{#if search_js}}
-        <script src="{{ path_to_root }}elasticlunr.min.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}mark.min.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}searcher.js" type="text/javascript" charset="utf-8"></script>
+        <script src="{{ path_to_root }}elasticlunr.min.js"></script>
+        <script src="{{ path_to_root }}mark.min.js"></script>
+        <script src="{{ path_to_root }}searcher.js"></script>
         {{/if}}
 
-        <script src="{{ path_to_root }}clipboard.min.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}highlight.js" type="text/javascript" charset="utf-8"></script>
-        <script src="{{ path_to_root }}book.js" type="text/javascript" charset="utf-8"></script>
+        <script src="{{ path_to_root }}clipboard.min.js"></script>
+        <script src="{{ path_to_root }}highlight.js"></script>
+        <script src="{{ path_to_root }}book.js"></script>
 
         <!-- Custom JS scripts -->
         {{#each additional_js}}
-        <script type="text/javascript" src="{{ ../path_to_root }}{{this}}"></script>
+        <script src="{{ ../path_to_root }}{{this}}"></script>
         {{/each}}
 
         {{#if is_print}}
         {{#if mathjax_support}}
-        <script type="text/javascript">
+        <script>
         window.addEventListener('load', function() {
             MathJax.Hub.Register.StartupHook('End', function() {
                 window.setTimeout(window.print, 100);
@@ -297,7 +329,7 @@
         });
         </script>
         {{else}}
-        <script type="text/javascript">
+        <script>
         window.addEventListener('load', function() {
             window.setTimeout(window.print, 100);
         });
@@ -305,5 +337,6 @@
         {{/if}}
         {{/if}}
 
+    </div>
     </body>
 </html>

contrib/Helix.appdata.xml

@@ -36,6 +36,9 @@
   <content_rating type="oars-1.1" />
 
   <releases>
+    <release version="23.05" date="2023-05-18">
+      <url>https://github.com/helix-editor/helix/releases/tag/23.05</url>
+    </release>
     <release version="23.03" date="2023-03-31">
       <url>https://helix-editor.com/news/release-23-03-highlights/</url>
     </release>

docs/releases.md

@@ -1,7 +1,7 @@
 ## Checklist
 
 Helix releases are versioned in the Calendar Versioning scheme:
-`YY.0M(.MICRO)`, for example `22.05` for May of 2022. In these instructions
+`YY.0M(.MICRO)`, for example, `22.05` for May of 2022. In these instructions
 we'll use `<tag>` as a placeholder for the tag being published.
 
 * Merge the changelog PR
@@ -30,7 +30,7 @@ we'll use `<tag>` as a placeholder for the tag being published.
 
 The changelog is currently created manually by reading through commits in the
 log since the last release. GitHub's compare view is a nice way to approach
-this. For example when creating the 22.07 release notes, this compare link
+this. For example, when creating the 22.07 release notes, this compare link
 may be used
 
 ```

docs/vision.md

@@ -20,5 +20,5 @@ Vision statements are all well and good, but are also vague and subjective.  Her
 * **Built-in tools** for working with code bases efficiently.  Most projects aren't a single file, and an editor should handle that as a first-class use case.  In Helix's case, this means (among other things) a fuzzy-search file navigator and LSP support.
 * **Edit anything** that comes up when coding, within reason.  Whether it's a 200 MB XML file, a megabyte of minified javascript on a single line, or Japanese text encoded in ShiftJIS, you should be able to open it and edit it without problems.  (Note: this doesn't mean handle every esoteric use case.  Sometimes you do just need a specialized tool, and Helix isn't that.)
 * **Configurable**, within reason.  Although the defaults should be good, not everyone will agree on what "good" is.  Within the bounds of Helix's core interaction models, it should be reasonably configurable so that it can be "good" for more people.  This means, for example, custom key maps among other things.
-* **Extensible**, within reason.  Although we want Helix to be productive out-of-the-box, it's not practical or desirable to cram every useful feature and use case into the core editor.  The basics should be built-in, but you should be able to extend it with additional functionality as needed.  Right now we're thinking Wasm-based plugins.
+* **Extensible**, within reason.  Although we want Helix to be productive out-of-the-box, it's not practical or desirable to cram every useful feature and use case into the core editor.  The basics should be built-in, but you should be able to extend it with additional functionality as needed.
 * **Clean code base.**  Sometimes other factors (e.g. significant performance gains, important features, correctness, etc.) will trump strict readability, but we nevertheless want to keep the code base straightforward and easy to understand to the extent we can.

flake.lock

@@ -1,109 +1,29 @@
 {
   "nodes": {
     "crane": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1670900067,
-        "narHash": "sha256-VXVa+KBfukhmWizaiGiHRVX/fuk66P8dgSFfkVN4/MY=",
-        "owner": "ipetkov",
-        "repo": "crane",
-        "rev": "59b31b41a589c0a65e4a1f86b0e5eac68081468b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ipetkov",
-        "repo": "crane",
-        "type": "github"
-      }
-    },
-    "dream2nix": {
       "inputs": {
-        "all-cabal-json": [
-          "nci"
-        ],
-        "crane": "crane",
-        "devshell": [
-          "nci"
-        ],
-        "drv-parts": "drv-parts",
         "flake-compat": "flake-compat",
-        "flake-parts": [
-          "nci",
-          "parts"
-        ],
-        "flake-utils-pre-commit": [
-          "nci"
-        ],
-        "ghc-utils": [
-          "nci"
-        ],
-        "gomod2nix": [
-          "nci"
-        ],
-        "mach-nix": [
-          "nci"
-        ],
-        "nix-pypi-fetcher": [
-          "nci"
+        "flake-utils": [
+          "flake-utils"
         ],
         "nixpkgs": [
-          "nci",
           "nixpkgs"
         ],
-        "nixpkgsV1": "nixpkgsV1",
-        "poetry2nix": [
-          "nci"
-        ],
-        "pre-commit-hooks": [
-          "nci"
-        ],
-        "pruned-racket-catalog": [
-          "nci"
-        ]
-      },
-      "locked": {
-        "lastModified": 1680258209,
-        "narHash": "sha256-lEo50RXI/17/a9aCIun8Hz62ZJ5JM5RGeTgclIP+Lgc=",
-        "owner": "nix-community",
-        "repo": "dream2nix",
-        "rev": "6f512b5a220fdb26bd3c659f7b55e4f052ec8b35",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "dream2nix",
-        "type": "github"
-      }
-    },
-    "drv-parts": {
-      "inputs": {
-        "flake-compat": [
-          "nci",
-          "dream2nix",
-          "flake-compat"
-        ],
-        "flake-parts": [
-          "nci",
-          "dream2nix",
-          "flake-parts"
-        ],
-        "nixpkgs": [
-          "nci",
-          "dream2nix",
-          "nixpkgs"
+        "rust-overlay": [
+          "rust-overlay"
         ]
       },
       "locked": {
-        "lastModified": 1680172861,
-        "narHash": "sha256-QMyI338xRxaHFDlCXdLCtgelGQX2PdlagZALky4ZXJ8=",
-        "owner": "davhau",
-        "repo": "drv-parts",
-        "rev": "ced8a52f62b0a94244713df2225c05c85b416110",
+        "lastModified": 1688772518,
+        "narHash": "sha256-ol7gZxwvgLnxNSZwFTDJJ49xVY5teaSvF7lzlo3YQfM=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "8b08e96c9af8c6e3a2b69af5a7fa168750fcf88e",
         "type": "github"
       },
       "original": {
-        "owner": "davhau",
-        "repo": "drv-parts",
+        "owner": "ipetkov",
+        "repo": "crane",
         "type": "github"
       }
     },
@@ -124,12 +44,15 @@
       }
     },
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
+        "lastModified": 1689068808,
+        "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
         "type": "github"
       },
       "original": {
@@ -138,55 +61,13 @@
         "type": "github"
       }
     },
-    "mk-naked-shell": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1676572903,
-        "narHash": "sha256-oQoDHHUTxNVSURfkFcYLuAK+btjs30T4rbEUtCUyKy8=",
-        "owner": "yusdacra",
-        "repo": "mk-naked-shell",
-        "rev": "aeca9f8aa592f5e8f71f407d081cb26fd30c5a57",
-        "type": "github"
-      },
-      "original": {
-        "owner": "yusdacra",
-        "repo": "mk-naked-shell",
-        "type": "github"
-      }
-    },
-    "nci": {
-      "inputs": {
-        "dream2nix": "dream2nix",
-        "mk-naked-shell": "mk-naked-shell",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "parts": "parts",
-        "rust-overlay": [
-          "rust-overlay"
-        ]
-      },
-      "locked": {
-        "lastModified": 1680329418,
-        "narHash": "sha256-+KN0eQLSZvL1J0kDO8/fxv0UCHTyZCADLmpIfeeiSGo=",
-        "owner": "yusdacra",
-        "repo": "nix-cargo-integration",
-        "rev": "98c1d2ff5155f0fee5d290f6b982cb990839d540",
-        "type": "github"
-      },
-      "original": {
-        "owner": "yusdacra",
-        "repo": "nix-cargo-integration",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1680213900,
-        "narHash": "sha256-cIDr5WZIj3EkKyCgj/6j3HBH4Jj1W296z7HTcWj1aMA=",
+        "lastModified": 1690272529,
+        "narHash": "sha256-MakzcKXEdv/I4qJUtq/k/eG+rVmyOZLnYNC2w1mB59Y=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "e3652e0735fbec227f342712f180f4f21f0594f2",
+        "rev": "ef99fa5c5ed624460217c31ac4271cfb5cb2502c",
         "type": "github"
       },
       "original": {
@@ -196,99 +77,29 @@
         "type": "github"
       }
     },
-    "nixpkgs-lib": {
-      "locked": {
-        "dir": "lib",
-        "lastModified": 1678375444,
-        "narHash": "sha256-XIgHfGvjFvZQ8hrkfocanCDxMefc/77rXeHvYdzBMc8=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "130fa0baaa2b93ec45523fdcde942f6844ee9f6e",
-        "type": "github"
-      },
-      "original": {
-        "dir": "lib",
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgsV1": {
-      "locked": {
-        "lastModified": 1678500271,
-        "narHash": "sha256-tRBLElf6f02HJGG0ZR7znMNFv/Uf7b2fFInpTHiHaSE=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "5eb98948b66de29f899c7fe27ae112a47964baf8",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-22.11",
-        "type": "indirect"
-      }
-    },
-    "parts": {
-      "inputs": {
-        "nixpkgs-lib": [
-          "nci",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1679737941,
-        "narHash": "sha256-srSD9CwsVPnUMsIZ7Kt/UegkKUEBcTyU1Rev7mO45S0=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "3502ee99d6dade045bdeaf7b0cd8ec703484c25c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "type": "github"
-      }
-    },
-    "parts_2": {
-      "inputs": {
-        "nixpkgs-lib": "nixpkgs-lib"
-      },
-      "locked": {
-        "lastModified": 1679737941,
-        "narHash": "sha256-srSD9CwsVPnUMsIZ7Kt/UegkKUEBcTyU1Rev7mO45S0=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "3502ee99d6dade045bdeaf7b0cd8ec703484c25c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
-        "nci": "nci",
+        "crane": "crane",
+        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
-        "parts": "parts_2",
         "rust-overlay": "rust-overlay"
       }
     },
     "rust-overlay": {
       "inputs": {
-        "flake-utils": "flake-utils",
+        "flake-utils": [
+          "flake-utils"
+        ],
         "nixpkgs": [
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1680315536,
-        "narHash": "sha256-0AsBuKssJMbcRcw4HJQwJsUHhZxR5+gaf6xPQayhR44=",
+        "lastModified": 1690424156,
+        "narHash": "sha256-Bpml+L280tHTQpwpC5/BJbU4HSvEzMvW8IZ4gAXimhE=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "5c8c151bdd639074a0051325c16df1a64ee23497",
+        "rev": "f335a0213504c7e6481c359dc1009be9cf34432c",
         "type": "github"
       },
       "original": {
@@ -296,6 +107,21 @@
         "repo": "rust-overlay",
         "type": "github"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -3,19 +3,35 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
-      inputs.nixpkgs.follows = "nixpkgs";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        flake-utils.follows = "flake-utils";
       };
-    nci = {
-      url = "github:yusdacra/nix-cargo-integration";
-      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    crane = {
+      url = "github:ipetkov/crane";
       inputs.rust-overlay.follows = "rust-overlay";
+      inputs.flake-utils.follows = "flake-utils";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
-    parts.url = "github:hercules-ci/flake-parts";
   };
 
-  outputs = inp: let
+  outputs = {
+    self,
+    nixpkgs,
+    crane,
+    flake-utils,
+    rust-overlay,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [(import rust-overlay)];
+      };
       mkRootPath = rel:
         builtins.path {
           path = "${toString ./.}/${rel}";
@@ -27,7 +43,6 @@
           ".ignore"
           ".github"
           ".gitignore"
-        "logo.svg"
           "logo_dark.svg"
           "logo_light.svg"
           "rust-toolchain.toml"
@@ -35,7 +50,6 @@
           "runtime"
           "screenshot.png"
           "book"
-        "contrib"
           "docs"
           "README.md"
           "CHANGELOG.md"
@@ -46,7 +60,7 @@
           "flake.lock"
         ];
         ignorePaths = path: type: let
-        inherit (inp.nixpkgs) lib;
+          inherit (nixpkgs) lib;
           # split the nix store path into its components
           components = lib.splitString "/" path;
           # drop off the `/nix/hash-source` section from the path
@@ -62,22 +76,6 @@
           # filter out unnecessary paths
           filter = ignorePaths;
         };
-  in
-    inp.parts.lib.mkFlake {inputs = inp;} {
-      imports = [inp.nci.flakeModule];
-      systems = [
-        "x86_64-linux"
-        "x86_64-darwin"
-        "aarch64-linux"
-        "aarch64-darwin"
-        "i686-linux"
-      ];
-      perSystem = {
-        config,
-        pkgs,
-        lib,
-        ...
-      }: let
       makeOverridableHelix = old: config: let
         grammars = pkgs.callPackage ./grammars.nix config;
         runtimeDir = pkgs.runCommand "helix-runtime" {} ''
@@ -122,34 +120,65 @@
         if stdenv.isLinux
         then ''$RUSTFLAGS -C link-arg=-fuse-ld=lld -C target-cpu=native -Clink-arg=-Wl,--no-rosegment''
         else "$RUSTFLAGS";
-      in {
-        nci.projects."helix-project".relPath = "";
-        nci.crates."helix-term" = {
-          overrides = {
-            add-meta.override = _: {meta.mainProgram = "hx";};
-            add-inputs.overrideAttrs = prev: {
-              buildInputs = (prev.buildInputs or []) ++ [stdenv.cc.cc.lib];
-            };
-            disable-grammar-builds = {
+      rustToolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
+      craneLibMSRV = (crane.mkLib pkgs).overrideToolchain rustToolchain;
+      craneLibStable = (crane.mkLib pkgs).overrideToolchain pkgs.pkgsBuildHost.rust-bin.stable.latest.default;
+      commonArgs =
+        {
+          inherit stdenv;
+          src = filteredSource;
           # disable fetching and building of tree-sitter grammars in the helix-term build.rs
           HELIX_DISABLE_AUTO_GRAMMAR_BUILD = "1";
+          buildInputs = [stdenv.cc.cc.lib];
+          # disable tests
+          doCheck = false;
+          meta.mainProgram = "hx";
+        }
+        // craneLibMSRV.crateNameFromCargoToml {cargoToml = ./helix-term/Cargo.toml;};
+      cargoArtifacts = craneLibMSRV.buildDepsOnly commonArgs;
+    in {
+      packages = {
+        helix-unwrapped = craneLibStable.buildPackage (commonArgs
+          // {
+            cargoArtifacts = craneLibStable.buildDepsOnly commonArgs;
+            postInstall = ''
+              mkdir -p $out/share/applications $out/share/icons/hicolor/scalable/apps $out/share/icons/hicolor/256x256/apps
+              cp contrib/Helix.desktop $out/share/applications
+              cp logo.svg $out/share/icons/hicolor/scalable/apps/helix.svg
+              cp contrib/helix.png $out/share/icons/hicolor/256x256/apps
+            '';
+          });
+        helix = makeOverridableHelix self.packages.${system}.helix-unwrapped {};
+        default = self.packages.${system}.helix;
       };
-            disable-tests = {checkPhase = ":";};
-            set-stdenv.override = _: {inherit stdenv;};
-            set-filtered-src.override = _: {src = filteredSource;};
-          };
-        };
 
-        packages.helix-unwrapped = config.nci.outputs."helix-term".packages.release;
-        packages.helix-unwrapped-dev = config.nci.outputs."helix-term".packages.dev;
-        packages.helix = makeOverridableHelix config.packages.helix-unwrapped {};
-        packages.helix-dev = makeOverridableHelix config.packages.helix-unwrapped-dev {};
-        packages.default = config.packages.helix;
+      checks = {
+        # Build the crate itself
+        inherit (self.packages.${system}) helix;
+
+        clippy = craneLibMSRV.cargoClippy (commonArgs
+          // {
+            inherit cargoArtifacts;
+            cargoClippyExtraArgs = "--all-targets -- --deny warnings";
+          });
+
+        fmt = craneLibMSRV.cargoFmt commonArgs;
+
+        doc = craneLibMSRV.cargoDoc (commonArgs
+          // {
+            inherit cargoArtifacts;
+          });
+
+        test = craneLibMSRV.cargoTest (commonArgs
+          // {
+            inherit cargoArtifacts;
+          });
+      };
 
-        devShells.default = config.nci.outputs."helix-project".devShell.overrideAttrs (old: {
-          nativeBuildInputs =
-            (old.nativeBuildInputs or [])
-            ++ (with pkgs; [lld_13 cargo-flamegraph rust-analyzer])
+      devShells.default = pkgs.mkShell {
+        inputsFrom = builtins.attrValues self.checks.${system};
+        nativeBuildInputs = with pkgs;
+          [lld_13 cargo-flamegraph rust-analyzer]
           ++ (lib.optional (stdenv.isx86_64 && stdenv.isLinux) pkgs.cargo-tarpaulin)
           ++ (lib.optional stdenv.isLinux pkgs.lldb)
           ++ (lib.optional stdenv.isDarwin pkgs.darwin.apple_sdk.frameworks.CoreFoundation);
@@ -158,7 +187,11 @@
           export RUST_BACKTRACE="1"
           export RUSTFLAGS="${rustFlagsEnv}"
         '';
-        });
+      };
+    })
+    // {
+      overlays.default = final: prev: {
+        inherit (self.packages.${final.system}) helix;
       };
     };
 

helix-core/Cargo.toml

@@ -18,20 +18,20 @@ integration = []
 helix-loader = { version = "0.6", path = "../helix-loader" }
 
 ropey = { version = "1.6.0", default-features = false, features = ["simd"] }
-smallvec = "1.10"
+smallvec = "1.11"
 smartstring = "1.0.1"
 unicode-segmentation = "1.10"
 unicode-width = "0.1"
 unicode-general-category = "0.6"
 # slab = "0.4.2"
 slotmap = "1.0"
-tree-sitter = "0.20"
-once_cell = "1.17"
+tree-sitter.workspace = true
+once_cell = "1.18"
 arc-swap = "1"
 regex = "1"
-bitflags = "2.0"
+bitflags = "2.4"
 ahash = "0.8.3"
-hashbrown = { version = "0.13.2", features = ["raw"] }
+hashbrown = { version = "0.14.0", features = ["raw"] }
 dunce = "1.0"
 
 log = "0.4"
@@ -45,9 +45,12 @@ encoding_rs = "0.8"
 
 chrono = { version = "0.4", default-features = false, features = ["alloc", "std"] }
 
-etcetera = "0.4"
+etcetera = "0.8"
 textwrap = "0.16.0"
 
+nucleo.workspace = true
+parking_lot = "0.12"
+
 [dev-dependencies]
 quickcheck = { version = "1", default-features = false }
-indoc = "2.0.1"
+indoc = "2.0.3"

helix-core/src/diagnostic.rs

@@ -43,6 +43,7 @@ pub struct Diagnostic {
     pub message: String,
     pub severity: Option<Severity>,
     pub code: Option<NumberOrString>,
+    pub language_server_id: usize,
     pub tags: Vec<DiagnosticTag>,
     pub source: Option<String>,
     pub data: Option<serde_json::Value>,

helix-core/src/fuzzy.rs

@@ -0,0 +1,43 @@
+use std::ops::DerefMut;
+
+use nucleo::pattern::{Atom, AtomKind, CaseMatching};
+use nucleo::Config;
+use parking_lot::Mutex;
+
+pub struct LazyMutex<T> {
+    inner: Mutex<Option<T>>,
+    init: fn() -> T,
+}
+
+impl<T> LazyMutex<T> {
+    pub const fn new(init: fn() -> T) -> Self {
+        Self {
+            inner: Mutex::new(None),
+            init,
+        }
+    }
+
+    pub fn lock(&self) -> impl DerefMut<Target = T> + '_ {
+        parking_lot::MutexGuard::map(self.inner.lock(), |val| val.get_or_insert_with(self.init))
+    }
+}
+
+pub static MATCHER: LazyMutex<nucleo::Matcher> = LazyMutex::new(nucleo::Matcher::default);
+
+/// convenience function to easily fuzzy match
+/// on a (relatively small list of inputs). This is not recommended for building a full tui
+/// application that can match large numbers of matches as all matching is done on the current
+/// thread, effectively blocking the UI
+pub fn fuzzy_match<T: AsRef<str>>(
+    pattern: &str,
+    items: impl IntoIterator<Item = T>,
+    path: bool,
+) -> Vec<(T, u16)> {
+    let mut matcher = MATCHER.lock();
+    matcher.config = Config::DEFAULT;
+    if path {
+        matcher.config.set_match_paths();
+    }
+    let pattern = Atom::new(pattern, CaseMatching::Smart, AtomKind::Fuzzy, false);
+    pattern.match_list(items, &mut matcher)
+}

helix-core/src/graphemes.rs

@@ -481,7 +481,7 @@ impl<'a> From<String> for GraphemeStr<'a> {
         let ptr = Box::into_raw(g.into_bytes().into_boxed_slice()) as *mut u8;
         GraphemeStr {
             ptr: unsafe { NonNull::new_unchecked(ptr) },
-            len: i32::try_from(len).unwrap() as u32,
+            len: (i32::try_from(len).unwrap() as u32) | Self::MASK_OWNED,
             phantom: PhantomData,
         }
     }

helix-core/src/history.rs

@@ -72,8 +72,8 @@ impl Default for History {
             revisions: vec![Revision {
                 parent: 0,
                 last_child: None,
-                transaction: Transaction::from(ChangeSet::new(&Rope::new())),
-                inversion: Transaction::from(ChangeSet::new(&Rope::new())),
+                transaction: Transaction::from(ChangeSet::new("".into())),
+                inversion: Transaction::from(ChangeSet::new("".into())),
                 timestamp: Instant::now(),
             }],
             current: 0,

helix-core/src/indent.rs

@@ -1,13 +1,13 @@
-use std::collections::HashMap;
+use std::{borrow::Cow, collections::HashMap};
 
 use tree_sitter::{Query, QueryCursor, QueryPredicateArg};
 
 use crate::{
     chars::{char_is_line_ending, char_is_whitespace},
-    graphemes::tab_width_at,
+    graphemes::{grapheme_width, tab_width_at},
     syntax::{LanguageConfiguration, RopeProvider, Syntax},
     tree_sitter::Node,
-    Rope, RopeSlice,
+    Rope, RopeGraphemes, RopeSlice,
 };
 
 /// Enum representing indentation style.
@@ -19,6 +19,10 @@ pub enum IndentStyle {
     Spaces(u8),
 }
 
+// 16 spaces
+const INDENTS: &str = "                ";
+const MAX_INDENT: u8 = 16;
+
 impl IndentStyle {
     /// Creates an `IndentStyle` from an indentation string.
     ///
@@ -27,10 +31,10 @@ impl IndentStyle {
     #[inline]
     pub fn from_str(indent: &str) -> Self {
         // XXX: do we care about validating the input more than this?  Probably not...?
-        debug_assert!(!indent.is_empty() && indent.len() <= 8);
+        debug_assert!(!indent.is_empty() && indent.len() <= MAX_INDENT as usize);
 
         if indent.starts_with(' ') {
-            IndentStyle::Spaces(indent.len() as u8)
+            IndentStyle::Spaces(indent.len().clamp(1, MAX_INDENT as usize) as u8)
         } else {
             IndentStyle::Tabs
         }
@@ -40,20 +44,13 @@ impl IndentStyle {
     pub fn as_str(&self) -> &'static str {
         match *self {
             IndentStyle::Tabs => "\t",
-            IndentStyle::Spaces(1) => " ",
-            IndentStyle::Spaces(2) => "  ",
-            IndentStyle::Spaces(3) => "   ",
-            IndentStyle::Spaces(4) => "    ",
-            IndentStyle::Spaces(5) => "     ",
-            IndentStyle::Spaces(6) => "      ",
-            IndentStyle::Spaces(7) => "       ",
-            IndentStyle::Spaces(8) => "        ",
-
-            // Unsupported indentation style.  This should never happen,
-            // but just in case fall back to two spaces.
             IndentStyle::Spaces(n) => {
-                debug_assert!(n > 0 && n <= 8); // Always triggers. `debug_panic!()` wanted.
-                "  "
+                // Unsupported indentation style.  This should never happen,
+                debug_assert!(n > 0 && n <= MAX_INDENT);
+
+                // Either way, clamp to the nearest supported value
+                let closest_n = n.clamp(1, MAX_INDENT) as usize;
+                &INDENTS[0..closest_n]
             }
         }
     }
@@ -75,9 +72,9 @@ pub fn auto_detect_indent_style(document_text: &Rope) -> Option<IndentStyle> {
     // Build a histogram of the indentation *increases* between
     // subsequent lines, ignoring lines that are all whitespace.
     //
-    // Index 0 is for tabs, the rest are 1-8 spaces.
-    let histogram: [usize; 9] = {
-        let mut histogram = [0; 9];
+    // Index 0 is for tabs, the rest are 1-MAX_INDENT spaces.
+    let histogram: [usize; MAX_INDENT as usize + 1] = {
+        let mut histogram = [0; MAX_INDENT as usize + 1];
         let mut prev_line_is_tabs = false;
         let mut prev_line_leading_count = 0usize;
 
@@ -136,7 +133,7 @@ pub fn auto_detect_indent_style(document_text: &Rope) -> Option<IndentStyle> {
                     histogram[0] += 1;
                 } else {
                     let amount = leading_count - prev_line_leading_count;
-                    if amount <= 8 {
+                    if amount <= MAX_INDENT as usize {
                         histogram[amount] += 1;
                     }
                 }
@@ -240,68 +237,117 @@ fn get_first_in_line(mut node: Node, new_line_byte_pos: Option<usize>) -> Vec<bo
 /// This is usually constructed in one of 2 ways:
 /// - Successively add indent captures to get the (added) indent from a single line
 /// - Successively add the indent results for each line
-#[derive(Default)]
+/// The string that this indentation defines starts with the string contained in the align field (unless it is None), followed by:
+/// - max(0, indent - outdent) tabs, if tabs are used for indentation
+/// - max(0, indent - outdent)*indent_width spaces, if spaces are used for indentation
+#[derive(Default, Debug, PartialEq, Eq, Clone)]
 pub struct Indentation {
-    /// The total indent (the number of indent levels) is defined as max(0, indent-outdent).
-    /// The string that this results in depends on the indent style (spaces or tabs, etc.)
     indent: usize,
+    indent_always: usize,
     outdent: usize,
+    outdent_always: usize,
+    /// The alignment, as a string containing only tabs & spaces. Storing this as a string instead of e.g.
+    /// the (visual) width ensures that the alignment is preserved even if the tab width changes.
+    align: Option<String>,
 }
+
 impl Indentation {
     /// Add some other [Indentation] to this.
-    /// The added indent should be the total added indent from one line
-    fn add_line(&mut self, added: &Indentation) {
-        if added.indent > 0 && added.outdent == 0 {
-            self.indent += 1;
-        } else if added.outdent > 0 && added.indent == 0 {
-            self.outdent += 1;
-        }
+    /// The added indent should be the total added indent from one line.
+    /// Indent should always be added starting from the bottom (or equivalently, the innermost tree-sitter node).
+    fn add_line(&mut self, added: Indentation) {
+        // Align overrides the indent from outer scopes.
+        if self.align.is_some() {
+            return;
+        }
+        if added.align.is_some() {
+            self.align = added.align;
+            return;
+        }
+        self.indent += added.indent;
+        self.indent_always += added.indent_always;
+        self.outdent += added.outdent;
+        self.outdent_always += added.outdent_always;
     }
+
     /// Add an indent capture to this indent.
     /// All the captures that are added in this way should be on the same line.
     fn add_capture(&mut self, added: IndentCaptureType) {
         match added {
             IndentCaptureType::Indent => {
+                if self.indent_always == 0 {
                     self.indent = 1;
                 }
+            }
+            IndentCaptureType::IndentAlways => {
+                // any time we encounter an `indent.always` on the same line, we
+                // want to cancel out all regular indents
+                self.indent_always += 1;
+                self.indent = 0;
+            }
             IndentCaptureType::Outdent => {
+                if self.outdent_always == 0 {
                     self.outdent = 1;
                 }
             }
+            IndentCaptureType::OutdentAlways => {
+                self.outdent_always += 1;
+                self.outdent = 0;
+            }
+            IndentCaptureType::Align(align) => {
+                self.align = Some(align);
+            }
         }
-    fn as_string(&self, indent_style: &IndentStyle) -> String {
-        let indent_level = if self.indent >= self.outdent {
-            self.indent - self.outdent
+    }
+    fn into_string(self, indent_style: &IndentStyle) -> String {
+        let indent = self.indent_always + self.indent;
+        let outdent = self.outdent_always + self.outdent;
+
+        let indent_level = if indent >= outdent {
+            indent - outdent
         } else {
             log::warn!("Encountered more outdent than indent nodes while calculating indentation: {} outdent, {} indent", self.outdent, self.indent);
             0
         };
-        indent_style.as_str().repeat(indent_level)
+        let mut indent_string = if let Some(align) = self.align {
+            align
+        } else {
+            String::new()
+        };
+        indent_string.push_str(&indent_style.as_str().repeat(indent_level));
+        indent_string
     }
 }
 
 /// An indent definition which corresponds to a capture from the indent query
+#[derive(Debug)]
 struct IndentCapture {
     capture_type: IndentCaptureType,
     scope: IndentScope,
 }
-#[derive(Clone, Copy)]
+#[derive(Debug, Clone, PartialEq)]
 enum IndentCaptureType {
     Indent,
+    IndentAlways,
     Outdent,
+    OutdentAlways,
+    /// Alignment given as a string of whitespace
+    Align(String),
 }
+
 impl IndentCaptureType {
     fn default_scope(&self) -> IndentScope {
         match self {
-            IndentCaptureType::Indent => IndentScope::Tail,
-            IndentCaptureType::Outdent => IndentScope::All,
+            IndentCaptureType::Indent | IndentCaptureType::IndentAlways => IndentScope::Tail,
+            IndentCaptureType::Outdent | IndentCaptureType::OutdentAlways => IndentScope::All,
+            IndentCaptureType::Align(_) => IndentScope::All,
         }
     }
 }
 /// This defines which part of a node an [IndentCapture] applies to.
 /// Each [IndentCaptureType] has a default scope, but the scope can be changed
 /// with `#set!` property declarations.
-#[derive(Clone, Copy)]
+#[derive(Debug, Clone, Copy)]
 enum IndentScope {
     /// The indent applies to the whole node
     All,
@@ -311,6 +357,7 @@ enum IndentScope {
 
 /// A capture from the indent query which does not define an indent but extends
 /// the range of a node. This is used before the indent is calculated.
+#[derive(Debug)]
 enum ExtendCapture {
     Extend,
     PreventOnce,
@@ -319,24 +366,41 @@ enum ExtendCapture {
 /// The result of running a tree-sitter indent query. This stores for
 /// each node (identified by its ID) the relevant captures (already filtered
 /// by predicates).
+#[derive(Debug)]
 struct IndentQueryResult {
     indent_captures: HashMap<usize, Vec<IndentCapture>>,
     extend_captures: HashMap<usize, Vec<ExtendCapture>>,
 }
 
+fn get_node_start_line(node: Node, new_line_byte_pos: Option<usize>) -> usize {
+    let mut node_line = node.start_position().row;
+    // Adjust for the new line that will be inserted
+    if new_line_byte_pos.map_or(false, |pos| node.start_byte() >= pos) {
+        node_line += 1;
+    }
+    node_line
+}
+fn get_node_end_line(node: Node, new_line_byte_pos: Option<usize>) -> usize {
+    let mut node_line = node.end_position().row;
+    // Adjust for the new line that will be inserted (with a strict inequality since end_byte is exclusive)
+    if new_line_byte_pos.map_or(false, |pos| node.end_byte() > pos) {
+        node_line += 1;
+    }
+    node_line
+}
+
 fn query_indents(
     query: &Query,
     syntax: &Syntax,
     cursor: &mut QueryCursor,
     text: RopeSlice,
     range: std::ops::Range<usize>,
-    // Position of the (optional) newly inserted line break.
-    // Given as (line, byte_pos)
-    new_line_break: Option<(usize, usize)>,
+    new_line_byte_pos: Option<usize>,
 ) -> IndentQueryResult {
     let mut indent_captures: HashMap<usize, Vec<IndentCapture>> = HashMap::new();
     let mut extend_captures: HashMap<usize, Vec<ExtendCapture>> = HashMap::new();
     cursor.set_byte_range(range);
+
     // Iterate over all captures from the query
     for m in cursor.matches(query, syntax.tree().root_node(), RopeProvider(text)) {
         // Skip matches where not all custom predicates are fulfilled
@@ -363,21 +427,13 @@ fn query_indents(
                             Some(QueryPredicateArg::Capture(capt1)),
                             Some(QueryPredicateArg::Capture(capt2))
                         ) => {
-                            let get_line_num = |node: Node| {
-                                let mut node_line = node.start_position().row;
-                                // Adjust for the new line that will be inserted
-                                if let Some((line, byte)) = new_line_break {
-                                    if node_line==line && node.start_byte()>=byte {
-                                        node_line += 1;
-                                    }
-                                }
-                                node_line
-                            };
                             let n1 = m.nodes_for_capture_index(*capt1).next();
                             let n2 = m.nodes_for_capture_index(*capt2).next();
                             match (n1, n2) {
                                 (Some(n1), Some(n2)) => {
-                                    let same_line = get_line_num(n1)==get_line_num(n2);
+                                    let n1_line = get_node_start_line(n1, new_line_byte_pos);
+                                    let n2_line = get_node_start_line(n2, new_line_byte_pos);
+                                    let same_line = n1_line == n2_line;
                                     same_line==(pred.operator.as_ref()=="same-line?")
                                 }
                                 _ => true,
@@ -388,6 +444,23 @@ fn query_indents(
                         }
                     }
                 }
+                "one-line?" | "not-one-line?" => match pred.args.get(0) {
+                    Some(QueryPredicateArg::Capture(capture_idx)) => {
+                        let node = m.nodes_for_capture_index(*capture_idx).next();
+
+                        match node {
+                            Some(node) => {
+                                let (start_line, end_line) = (get_node_start_line(node,new_line_byte_pos), get_node_end_line(node, new_line_byte_pos));
+                                let one_line = end_line == start_line;
+                                one_line != (pred.operator.as_ref() == "not-one-line?")
+                            },
+                            _ => true,
+                        }
+                    }
+                    _ => {
+                        panic!("Invalid indent query: Arguments to \"not-kind-eq?\" must be a capture and a string");
+                    }
+                },
                 _ => {
                     panic!(
                         "Invalid indent query: Unknown predicate (\"{}\")",
@@ -398,11 +471,28 @@ fn query_indents(
         }) {
             continue;
         }
+        // A list of pairs (node_id, indent_capture) that are added by this match.
+        // They cannot be added to indent_captures immediately since they may depend on other captures (such as an @anchor).
+        let mut added_indent_captures: Vec<(usize, IndentCapture)> = Vec::new();
+        // The row/column position of the optional anchor in this query
+        let mut anchor: Option<tree_sitter::Node> = None;
         for capture in m.captures {
             let capture_name = query.capture_names()[capture.index as usize].as_str();
             let capture_type = match capture_name {
                 "indent" => IndentCaptureType::Indent,
+                "indent.always" => IndentCaptureType::IndentAlways,
                 "outdent" => IndentCaptureType::Outdent,
+                "outdent.always" => IndentCaptureType::OutdentAlways,
+                // The alignment will be updated to the correct value at the end, when the anchor is known.
+                "align" => IndentCaptureType::Align(String::from("")),
+                "anchor" => {
+                    if anchor.is_some() {
+                        log::error!("Invalid indent query: Encountered more than one @anchor in the same match.")
+                    } else {
+                        anchor = Some(capture.node);
+                    }
+                    continue;
+                }
                 "extend" => {
                     extend_captures
                         .entry(capture.node.id())
@@ -452,17 +542,52 @@ fn query_indents(
                     }
                 }
             }
+            added_indent_captures.push((capture.node.id(), indent_capture))
+        }
+        for (node_id, mut capture) in added_indent_captures {
+            // Set the anchor for all align queries.
+            if let IndentCaptureType::Align(_) = capture.capture_type {
+                let anchor = match anchor {
+                    None => {
+                        log::error!(
+                            "Invalid indent query: @align requires an accompanying @anchor."
+                        );
+                        continue;
+                    }
+                    Some(anchor) => anchor,
+                };
+                // Create a string of tabs & spaces that should have the same width
+                // as the string that precedes the anchor (independent of the tab width).
+                let mut align = String::new();
+                for grapheme in RopeGraphemes::new(
+                    text.line(anchor.start_position().row)
+                        .byte_slice(0..anchor.start_position().column),
+                ) {
+                    if grapheme == "\t" {
+                        align.push('\t');
+                    } else {
+                        align.extend(
+                            std::iter::repeat(' ').take(grapheme_width(&Cow::from(grapheme))),
+                        );
+                    }
+                }
+                capture.capture_type = IndentCaptureType::Align(align);
+            }
             indent_captures
-                .entry(capture.node.id())
-                // Most entries only need to contain a single IndentCapture
+                .entry(node_id)
                 .or_insert_with(|| Vec::with_capacity(1))
-                .push(indent_capture);
+                .push(capture);
         }
     }
-    IndentQueryResult {
+
+    let result = IndentQueryResult {
         indent_captures,
         extend_captures,
-    }
+    };
+
+    log::trace!("indent result = {:?}", result);
+
+    result
 }
 
 /// Handle extend queries. deepest_preceding is the deepest descendant of node that directly precedes the cursor position.
@@ -581,12 +706,14 @@ pub fn treesitter_indent_for_pos(
     new_line: bool,
 ) -> Option<String> {
     let byte_pos = text.char_to_byte(pos);
+    let new_line_byte_pos = new_line.then_some(byte_pos);
     // The innermost tree-sitter node which is considered for the indent
     // computation. It may change if some predeceding node is extended
     let mut node = syntax
         .tree()
         .root_node()
         .descendant_for_byte_range(byte_pos, byte_pos)?;
+
     let (query_result, deepest_preceding) = {
         // The query range should intersect with all nodes directly preceding
         // the position of the indent query in case one of them is extended.
@@ -617,13 +744,13 @@ pub fn treesitter_indent_for_pos(
                 &mut cursor,
                 text,
                 query_range,
-                new_line.then_some((line, byte_pos)),
+                new_line_byte_pos,
             );
             ts_parser.cursors.push(cursor);
             (query_result, deepest_preceding)
         })
     };
-    let indent_captures = query_result.indent_captures;
+    let mut indent_captures = query_result.indent_captures;
     let extend_captures = query_result.extend_captures;
 
     // Check for extend captures, potentially changing the node that the indent calculation starts with
@@ -645,12 +772,16 @@ pub fn treesitter_indent_for_pos(
     // even if there are multiple "indent" nodes on the same line
     let mut indent_for_line = Indentation::default();
     let mut indent_for_line_below = Indentation::default();
+
     loop {
         // This can safely be unwrapped because `first_in_line` contains
         // one entry for each ancestor of the node (which is what we iterate over)
         let is_first = *first_in_line.last().unwrap();
-        // Apply all indent definitions for this node
-        if let Some(definitions) = indent_captures.get(&node.id()) {
+
+        // Apply all indent definitions for this node.
+        // Since we only iterate over each node once, we can remove the
+        // corresponding captures from the HashMap to avoid cloning them.
+        if let Some(definitions) = indent_captures.remove(&node.id()) {
             for definition in definitions {
                 match definition.scope {
                     IndentScope::All => {
@@ -668,28 +799,22 @@ pub fn treesitter_indent_for_pos(
         }
 
         if let Some(parent) = node.parent() {
-            let mut node_line = node.start_position().row;
-            let mut parent_line = parent.start_position().row;
-            if node_line == line && new_line {
-                // Also consider the line that will be inserted
-                if node.start_byte() >= byte_pos {
-                    node_line += 1;
-                }
-                if parent.start_byte() >= byte_pos {
-                    parent_line += 1;
-                }
-            };
+            let node_line = get_node_start_line(node, new_line_byte_pos);
+            let parent_line = get_node_start_line(parent, new_line_byte_pos);
+
             if node_line != parent_line {
-                if node_line < line + (new_line as usize) {
                 // Don't add indent for the line below the line of the query
-                    result.add_line(&indent_for_line_below);
+                if node_line < line + (new_line as usize) {
+                    result.add_line(indent_for_line_below);
                 }
+
                 if node_line == parent_line + 1 {
                     indent_for_line_below = indent_for_line;
                 } else {
-                    result.add_line(&indent_for_line);
+                    result.add_line(indent_for_line);
                     indent_for_line_below = Indentation::default();
                 }
+
                 indent_for_line = Indentation::default();
             }
 
@@ -701,13 +826,13 @@ pub fn treesitter_indent_for_pos(
             if (node.start_position().row < line)
                 || (new_line && node.start_position().row == line && node.start_byte() < byte_pos)
             {
-                result.add_line(&indent_for_line_below);
+                result.add_line(indent_for_line_below);
             }
-            result.add_line(&indent_for_line);
+            result.add_line(indent_for_line);
             break;
         }
     }
-    Some(result.as_string(indent_style))
+    Some(result.into_string(indent_style))
 }
 
 /// Returns the indentation for a new line.
@@ -797,4 +922,138 @@ mod test {
             3
         );
     }
+
+    #[test]
+    fn test_large_indent_level() {
+        let tab_width = 16;
+        let indent_width = 16;
+        let line = Rope::from("                fn new"); // 16 spaces
+        assert_eq!(
+            indent_level_for_line(line.slice(..), tab_width, indent_width),
+            1
+        );
+        let line = Rope::from("                                fn new"); // 32 spaces
+        assert_eq!(
+            indent_level_for_line(line.slice(..), tab_width, indent_width),
+            2
+        );
+    }
+
+    #[test]
+    fn add_capture() {
+        let indent = || Indentation {
+            indent: 1,
+            ..Default::default()
+        };
+        let indent_always = || Indentation {
+            indent_always: 1,
+            ..Default::default()
+        };
+        let outdent = || Indentation {
+            outdent: 1,
+            ..Default::default()
+        };
+        let outdent_always = || Indentation {
+            outdent_always: 1,
+            ..Default::default()
+        };
+
+        let add_capture = |mut indent: Indentation, capture| {
+            indent.add_capture(capture);
+            indent
+        };
+
+        // adding an indent to no indent makes an indent
+        assert_eq!(
+            indent(),
+            add_capture(Indentation::default(), IndentCaptureType::Indent)
+        );
+        assert_eq!(
+            indent_always(),
+            add_capture(Indentation::default(), IndentCaptureType::IndentAlways)
+        );
+        assert_eq!(
+            outdent(),
+            add_capture(Indentation::default(), IndentCaptureType::Outdent)
+        );
+        assert_eq!(
+            outdent_always(),
+            add_capture(Indentation::default(), IndentCaptureType::OutdentAlways)
+        );
+
+        // adding an indent to an already indented has no effect
+        assert_eq!(indent(), add_capture(indent(), IndentCaptureType::Indent));
+        assert_eq!(
+            outdent(),
+            add_capture(outdent(), IndentCaptureType::Outdent)
+        );
+
+        // adding an always to a regular makes it always
+        assert_eq!(
+            indent_always(),
+            add_capture(indent(), IndentCaptureType::IndentAlways)
+        );
+        assert_eq!(
+            outdent_always(),
+            add_capture(outdent(), IndentCaptureType::OutdentAlways)
+        );
+
+        // adding an always to an always is additive
+        assert_eq!(
+            Indentation {
+                indent_always: 2,
+                ..Default::default()
+            },
+            add_capture(indent_always(), IndentCaptureType::IndentAlways)
+        );
+        assert_eq!(
+            Indentation {
+                outdent_always: 2,
+                ..Default::default()
+            },
+            add_capture(outdent_always(), IndentCaptureType::OutdentAlways)
+        );
+
+        // adding regular to always should be associative
+        assert_eq!(
+            Indentation {
+                indent_always: 1,
+                ..Default::default()
+            },
+            add_capture(
+                add_capture(indent(), IndentCaptureType::Indent),
+                IndentCaptureType::IndentAlways
+            )
+        );
+        assert_eq!(
+            Indentation {
+                indent_always: 1,
+                ..Default::default()
+            },
+            add_capture(
+                add_capture(indent(), IndentCaptureType::IndentAlways),
+                IndentCaptureType::Indent
+            )
+        );
+        assert_eq!(
+            Indentation {
+                outdent_always: 1,
+                ..Default::default()
+            },
+            add_capture(
+                add_capture(outdent(), IndentCaptureType::Outdent),
+                IndentCaptureType::OutdentAlways
+            )
+        );
+        assert_eq!(
+            Indentation {
+                outdent_always: 1,
+                ..Default::default()
+            },
+            add_capture(
+                add_capture(outdent(), IndentCaptureType::OutdentAlways),
+                IndentCaptureType::Outdent
+            )
+        );
+    }
 }

helix-core/src/lib.rs

@@ -7,6 +7,7 @@ pub mod config;
 pub mod diagnostic;
 pub mod diff;
 pub mod doc_formatter;
+pub mod fuzzy;
 pub mod graphemes;
 pub mod history;
 pub mod increment;
@@ -18,7 +19,6 @@ pub mod movement;
 pub mod object;
 pub mod path;
 mod position;
-pub mod register;
 pub mod search;
 pub mod selection;
 pub mod shellwords;
@@ -41,7 +41,9 @@ pub use helix_loader::find_workspace;
 pub fn find_first_non_whitespace_char(line: RopeSlice) -> Option<usize> {
     line.chars().position(|ch| !ch.is_whitespace())
 }
+mod rope_reader;
 
+pub use rope_reader::RopeReader;
 pub use ropey::{self, str_utils, Rope, RopeBuilder, RopeSlice};
 
 // pub use tendril::StrTendril as Tendril;
@@ -66,5 +68,5 @@ pub use syntax::Syntax;
 
 pub use diagnostic::Diagnostic;
 
-pub use line_ending::{LineEnding, DEFAULT_LINE_ENDING};
-pub use transaction::{Assoc, Change, ChangeSet, Operation, Transaction};
+pub use line_ending::{LineEnding, NATIVE_LINE_ENDING};
+pub use transaction::{Assoc, Change, ChangeSet, Deletion, Operation, Transaction};

helix-core/src/line_ending.rs

@@ -1,9 +1,9 @@
 use crate::{Rope, RopeSlice};
 
 #[cfg(target_os = "windows")]
-pub const DEFAULT_LINE_ENDING: LineEnding = LineEnding::Crlf;
+pub const NATIVE_LINE_ENDING: LineEnding = LineEnding::Crlf;
 #[cfg(not(target_os = "windows"))]
-pub const DEFAULT_LINE_ENDING: LineEnding = LineEnding::LF;
+pub const NATIVE_LINE_ENDING: LineEnding = LineEnding::LF;
 
 /// Represents one of the valid Unicode line endings.
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]

helix-core/src/match_brackets.rs

@@ -1,7 +1,15 @@
+use std::iter;
+
+use ropey::RopeSlice;
 use tree_sitter::Node;
 
-use crate::{Rope, Syntax};
+use crate::movement::Direction::{self, Backward, Forward};
+use crate::Syntax;
+
+const MAX_PLAINTEXT_SCAN: usize = 10000;
+const MATCH_LIMIT: usize = 16;
 
+// Limit matching pairs to only ( ) { } [ ] < > ' ' " "
 const PAIRS: &[(char, char)] = &[
     ('(', ')'),
     ('{', '}'),
@@ -11,17 +19,17 @@ const PAIRS: &[(char, char)] = &[
     ('\"', '\"'),
 ];
 
-// limit matching pairs to only ( ) { } [ ] < > ' ' " "
-
-// Returns the position of the matching bracket under cursor.
-//
-// If the cursor is one the opening bracket, the position of
-// the closing bracket is returned. If the cursor in the closing
-// bracket, the position of the opening bracket is returned.
-//
-// If the cursor is not on a bracket, `None` is returned.
+/// Returns the position of the matching bracket under cursor.
+///
+/// If the cursor is on the opening bracket, the position of
+/// the closing bracket is returned. If the cursor on the closing
+/// bracket, the position of the opening bracket is returned.
+///
+/// If the cursor is not on a bracket, `None` is returned.
+///
+/// If no matching bracket is found, `None` is returned.
 #[must_use]
-pub fn find_matching_bracket(syntax: &Syntax, doc: &Rope, pos: usize) -> Option<usize> {
+pub fn find_matching_bracket(syntax: &Syntax, doc: RopeSlice, pos: usize) -> Option<usize> {
     if pos >= doc.len_chars() || !is_valid_bracket(doc.char(pos)) {
         return None;
     }
@@ -39,17 +47,23 @@ pub fn find_matching_bracket(syntax: &Syntax, doc: &Rope, pos: usize) -> Option<
 //
 // If no surrounding scope is found, the function returns `None`.
 #[must_use]
-pub fn find_matching_bracket_fuzzy(syntax: &Syntax, doc: &Rope, pos: usize) -> Option<usize> {
+pub fn find_matching_bracket_fuzzy(syntax: &Syntax, doc: RopeSlice, pos: usize) -> Option<usize> {
     find_pair(syntax, doc, pos, true)
 }
 
-fn find_pair(syntax: &Syntax, doc: &Rope, pos: usize, traverse_parents: bool) -> Option<usize> {
+fn find_pair(
+    syntax: &Syntax,
+    doc: RopeSlice,
+    pos_: usize,
+    traverse_parents: bool,
+) -> Option<usize> {
     let tree = syntax.tree();
-    let pos = doc.char_to_byte(pos);
+    let pos = doc.char_to_byte(pos_);
 
-    let mut node = tree.root_node().named_descendant_for_byte_range(pos, pos)?;
+    let mut node = tree.root_node().descendant_for_byte_range(pos, pos)?;
 
     loop {
+        if node.is_named() {
             let (start_byte, end_byte) = surrounding_bytes(doc, &node)?;
             let (start_char, end_char) = (doc.byte_to_char(start_byte), doc.byte_to_char(end_byte));
 
@@ -57,28 +71,135 @@ fn find_pair(syntax: &Syntax, doc: &Rope, pos: usize, traverse_parents: bool) ->
                 if end_byte == pos {
                     return Some(start_char);
                 }
+
                 // We return the end char if the cursor is either on the start char
                 // or at some arbitrary position between start and end char.
+                if traverse_parents || start_byte == pos {
                     return Some(end_char);
                 }
+            }
+        }
+        // this node itselt wasn't a pair but maybe its siblings are
 
-        if traverse_parents {
-            node = node.parent()?;
-        } else {
+        // check if we are *on* the pair (special cased so we don't look
+        // at the current node twice and to jump to the start on that case)
+        if let Some(open) = as_close_pair(doc, &node) {
+            if let Some(pair_start) = find_pair_end(doc, node.prev_sibling(), open, Backward) {
+                return Some(pair_start);
+            }
+        }
+
+        if !traverse_parents {
+            // check if we are *on* the opening pair (special cased here as
+            // an opptimization since we only care about bracket on the cursor
+            // here)
+            if let Some(close) = as_open_pair(doc, &node) {
+                if let Some(pair_end) = find_pair_end(doc, node.next_sibling(), close, Forward) {
+                    return Some(pair_end);
+                }
+            }
+            if node.is_named() {
+                break;
+            }
+        }
+
+        for close in
+            iter::successors(node.next_sibling(), |node| node.next_sibling()).take(MATCH_LIMIT)
+        {
+            let Some(open) = as_close_pair(doc, &close) else {
+                continue;
+            };
+            if find_pair_end(doc, Some(node), open, Backward).is_some() {
+                return doc.try_byte_to_char(close.start_byte()).ok();
+            }
+        }
+        let Some(parent) = node.parent() else {
+            break;
+        };
+        node = parent;
+    }
+    let node = tree.root_node().named_descendant_for_byte_range(pos, pos)?;
+    if node.child_count() != 0 {
+        return None;
+    }
+    let node_start = doc.byte_to_char(node.start_byte());
+    find_matching_bracket_plaintext(doc.byte_slice(node.byte_range()), pos_ - node_start)
+        .map(|pos| pos + node_start)
+}
+
+/// Returns the position of the matching bracket under cursor.
+/// This function works on plain text and ignores tree-sitter grammar.
+/// The search is limited to `MAX_PLAINTEXT_SCAN` characters
+///
+/// If the cursor is on the opening bracket, the position of
+/// the closing bracket is returned. If the cursor on the closing
+/// bracket, the position of the opening bracket is returned.
+///
+/// If the cursor is not on a bracket, `None` is returned.
+///
+/// If no matching bracket is found, `None` is returned.
+#[must_use]
+pub fn find_matching_bracket_plaintext(doc: RopeSlice, cursor_pos: usize) -> Option<usize> {
+    // Don't do anything when the cursor is not on top of a bracket.
+    let bracket = doc.char(cursor_pos);
+    if !is_valid_bracket(bracket) {
         return None;
     }
+
+    // Determine the direction of the matching.
+    let is_fwd = is_forward_bracket(bracket);
+    let chars_iter = if is_fwd {
+        doc.chars_at(cursor_pos + 1)
+    } else {
+        doc.chars_at(cursor_pos).reversed()
+    };
+
+    let mut open_cnt = 1;
+
+    for (i, candidate) in chars_iter.take(MAX_PLAINTEXT_SCAN).enumerate() {
+        if candidate == bracket {
+            open_cnt += 1;
+        } else if is_valid_pair(
+            doc,
+            if is_fwd {
+                cursor_pos
+            } else {
+                cursor_pos - i - 1
+            },
+            if is_fwd {
+                cursor_pos + i + 1
+            } else {
+                cursor_pos
+            },
+        ) {
+            // Return when all pending brackets have been closed.
+            if open_cnt == 1 {
+                return Some(if is_fwd {
+                    cursor_pos + i + 1
+                } else {
+                    cursor_pos - i - 1
+                });
+            }
+            open_cnt -= 1;
+        }
     }
+
+    None
 }
 
 fn is_valid_bracket(c: char) -> bool {
     PAIRS.iter().any(|(l, r)| *l == c || *r == c)
 }
 
-fn is_valid_pair(doc: &Rope, start_char: usize, end_char: usize) -> bool {
+fn is_forward_bracket(c: char) -> bool {
+    PAIRS.iter().any(|(l, _)| *l == c)
+}
+
+fn is_valid_pair(doc: RopeSlice, start_char: usize, end_char: usize) -> bool {
     PAIRS.contains(&(doc.char(start_char), doc.char(end_char)))
 }
 
-fn surrounding_bytes(doc: &Rope, node: &Node) -> Option<(usize, usize)> {
+fn surrounding_bytes(doc: RopeSlice, node: &Node) -> Option<(usize, usize)> {
     let len = doc.len_bytes();
 
     let start_byte = node.start_byte();
@@ -90,3 +211,85 @@ fn surrounding_bytes(doc: &Rope, node: &Node) -> Option<(usize, usize)> {
 
     Some((start_byte, end_byte))
 }
+
+/// Tests if this node is a pair close char and returns the expected open char
+fn as_close_pair(doc: RopeSlice, node: &Node) -> Option<char> {
+    let close = as_char(doc, node)?.1;
+    PAIRS
+        .iter()
+        .find_map(|&(open, close_)| (close_ == close).then_some(open))
+}
+
+/// Checks if `node` or its siblings (at most MATCH_LIMIT nodes) is the specified closing char
+///
+/// # Returns
+///
+/// The position of the found node or `None` otherwise
+fn find_pair_end(
+    doc: RopeSlice,
+    node: Option<Node>,
+    end_char: char,
+    direction: Direction,
+) -> Option<usize> {
+    let advance = match direction {
+        Forward => Node::next_sibling,
+        Backward => Node::prev_sibling,
+    };
+    iter::successors(node, advance)
+        .take(MATCH_LIMIT)
+        .find_map(|node| {
+            let (pos, c) = as_char(doc, &node)?;
+            (end_char == c).then_some(pos)
+        })
+}
+
+/// Tests if this node is a pair close char and returns the expected open char
+fn as_open_pair(doc: RopeSlice, node: &Node) -> Option<char> {
+    let open = as_char(doc, node)?.1;
+    PAIRS
+        .iter()
+        .find_map(|&(open_, close)| (open_ == open).then_some(close))
+}
+
+/// If node is a single char return it (and its char position)
+fn as_char(doc: RopeSlice, node: &Node) -> Option<(usize, char)> {
+    // TODO: multi char/non ASCII pairs
+    if node.byte_range().len() != 1 {
+        return None;
+    }
+    let pos = doc.try_byte_to_char(node.start_byte()).ok()?;
+    Some((pos, doc.char(pos)))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_find_matching_bracket_current_line_plaintext() {
+        let assert = |input: &str, pos, expected| {
+            let input = RopeSlice::from(input);
+            let actual = find_matching_bracket_plaintext(input, pos);
+            assert_eq!(expected, actual.unwrap());
+
+            let actual = find_matching_bracket_plaintext(input, expected);
+            assert_eq!(pos, actual.unwrap(), "expected symmetrical behaviour");
+        };
+
+        assert("(hello)", 0, 6);
+        assert("((hello))", 0, 8);
+        assert("((hello))", 1, 7);
+        assert("(((hello)))", 2, 8);
+
+        assert("key: ${value}", 6, 12);
+        assert("key: ${value} # (some comment)", 16, 29);
+
+        assert("(paren (paren {bracket}))", 0, 24);
+        assert("(paren (paren {bracket}))", 7, 23);
+        assert("(paren (paren {bracket}))", 14, 22);
+
+        assert("(prev line\n ) (middle) ( \n next line)", 0, 12);
+        assert("(prev line\n ) (middle) ( \n next line)", 14, 21);
+        assert("(prev line\n ) (middle) ( \n next line)", 23, 36);
+    }
+}

helix-core/src/movement.rs

@@ -1,4 +1,4 @@
-use std::iter;
+use std::{cmp::Reverse, iter};
 
 use ropey::iter::Chars;
 use tree_sitter::{Node, QueryCursor};
@@ -16,7 +16,7 @@ use crate::{
     syntax::LanguageConfiguration,
     text_annotations::TextAnnotations,
     textobject::TextObject,
-    visual_offset_from_block, Range, RopeSlice,
+    visual_offset_from_block, Range, RopeSlice, Selection, Syntax,
 };
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
@@ -62,7 +62,7 @@ pub fn move_vertically_visual(
     annotations: &mut TextAnnotations,
 ) -> Range {
     if !text_fmt.soft_wrap {
-        move_vertically(slice, range, dir, count, behaviour, text_fmt, annotations);
+        return move_vertically(slice, range, dir, count, behaviour, text_fmt, annotations);
     }
     annotations.clear_line_annotations();
     let pos = range.cursor(slice);
@@ -177,6 +177,10 @@ pub fn move_prev_word_start(slice: RopeSlice, range: Range, count: usize) -> Ran
     word_move(slice, range, count, WordMotionTarget::PrevWordStart)
 }
 
+pub fn move_prev_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
+    word_move(slice, range, count, WordMotionTarget::PrevWordEnd)
+}
+
 pub fn move_next_long_word_start(slice: RopeSlice, range: Range, count: usize) -> Range {
     word_move(slice, range, count, WordMotionTarget::NextLongWordStart)
 }
@@ -189,8 +193,8 @@ pub fn move_prev_long_word_start(slice: RopeSlice, range: Range, count: usize) -
     word_move(slice, range, count, WordMotionTarget::PrevLongWordStart)
 }
 
-pub fn move_prev_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
-    word_move(slice, range, count, WordMotionTarget::PrevWordEnd)
+pub fn move_prev_long_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
+    word_move(slice, range, count, WordMotionTarget::PrevLongWordEnd)
 }
 
 fn word_move(slice: RopeSlice, range: Range, count: usize, target: WordMotionTarget) -> Range {
@@ -199,6 +203,7 @@ fn word_move(slice: RopeSlice, range: Range, count: usize, target: WordMotionTar
         WordMotionTarget::PrevWordStart
             | WordMotionTarget::PrevLongWordStart
             | WordMotionTarget::PrevWordEnd
+            | WordMotionTarget::PrevLongWordEnd
     );
 
     // Special-case early-out.
@@ -377,6 +382,7 @@ pub enum WordMotionTarget {
     NextLongWordStart,
     NextLongWordEnd,
     PrevLongWordStart,
+    PrevLongWordEnd,
 }
 
 pub trait CharHelpers {
@@ -393,6 +399,7 @@ impl CharHelpers for Chars<'_> {
             WordMotionTarget::PrevWordStart
                 | WordMotionTarget::PrevLongWordStart
                 | WordMotionTarget::PrevWordEnd
+                | WordMotionTarget::PrevLongWordEnd
         );
 
         // Reverse the iterator if needed for the motion direction.
@@ -479,7 +486,7 @@ fn reached_target(target: WordMotionTarget, prev_ch: char, next_ch: char) -> boo
             is_word_boundary(prev_ch, next_ch)
                 && (!prev_ch.is_whitespace() || char_is_line_ending(next_ch))
         }
-        WordMotionTarget::NextLongWordStart => {
+        WordMotionTarget::NextLongWordStart | WordMotionTarget::PrevLongWordEnd => {
             is_long_word_boundary(prev_ch, next_ch)
                 && (char_is_line_ending(next_ch) || !next_ch.is_whitespace())
         }
@@ -520,10 +527,10 @@ pub fn goto_treesitter_object(
         let node = match dir {
             Direction::Forward => nodes
                 .filter(|n| n.start_byte() > byte_pos)
-                .min_by_key(|n| n.start_byte())?,
+                .min_by_key(|n| (n.start_byte(), Reverse(n.end_byte())))?,
             Direction::Backward => nodes
                 .filter(|n| n.end_byte() < byte_pos)
-                .max_by_key(|n| n.end_byte())?,
+                .max_by_key(|n| (n.end_byte(), Reverse(n.start_byte())))?,
         };
 
         let len = slice.len_bytes();
@@ -549,6 +556,85 @@ pub fn goto_treesitter_object(
     last_range
 }
 
+fn find_parent_start(mut node: Node) -> Option<Node> {
+    let start = node.start_byte();
+
+    while node.start_byte() >= start || !node.is_named() {
+        node = node.parent()?;
+    }
+
+    Some(node)
+}
+
+pub fn move_parent_node_end(
+    syntax: &Syntax,
+    text: RopeSlice,
+    selection: Selection,
+    dir: Direction,
+    movement: Movement,
+) -> Selection {
+    let tree = syntax.tree();
+
+    selection.transform(|range| {
+        let start_from = text.char_to_byte(range.from());
+        let start_to = text.char_to_byte(range.to());
+
+        let mut node = match tree
+            .root_node()
+            .named_descendant_for_byte_range(start_from, start_to)
+        {
+            Some(node) => node,
+            None => {
+                log::debug!(
+                    "no descendant found for byte range: {} - {}",
+                    start_from,
+                    start_to
+                );
+                return range;
+            }
+        };
+
+        let mut end_head = match dir {
+            // moving forward, we always want to move one past the end of the
+            // current node, so use the end byte of the current node, which is an exclusive
+            // end of the range
+            Direction::Forward => text.byte_to_char(node.end_byte()),
+
+            // moving backward, we want the cursor to land on the start char of
+            // the current node, or if it is already at the start of a node, to traverse up to
+            // the parent
+            Direction::Backward => {
+                let end_head = text.byte_to_char(node.start_byte());
+
+                // if we're already on the beginning, look up to the parent
+                if end_head == range.cursor(text) {
+                    node = find_parent_start(node).unwrap_or(node);
+                    text.byte_to_char(node.start_byte())
+                } else {
+                    end_head
+                }
+            }
+        };
+
+        if movement == Movement::Move {
+            // preserve direction of original range
+            if range.direction() == Direction::Forward {
+                Range::new(end_head, end_head + 1)
+            } else {
+                Range::new(end_head + 1, end_head)
+            }
+        } else {
+            // if we end up with a forward range, then adjust it to be one past
+            // where we want
+            if end_head >= range.anchor {
+                end_head += 1;
+            }
+
+            Range::new(range.anchor, end_head)
+        }
+    })
+}
+
 #[cfg(test)]
 mod test {
     use ropey::Rope;
@@ -1445,6 +1531,100 @@ mod test {
         }
     }
 
+    #[test]
+    fn test_behaviour_when_moving_to_end_of_prev_long_words() {
+        let tests = [
+            (
+                "Basic backward motion from the middle of a word",
+                vec![(1, Range::new(3, 3), Range::new(4, 0))],
+            ),
+            ("Starting from after boundary retreats the anchor",
+                vec![(1, Range::new(0, 9), Range::new(8, 0))],
+            ),
+            (
+                "Jump    to end of a word succeeded by whitespace",
+                vec![(1, Range::new(10, 10), Range::new(10, 4))],
+            ),
+            (
+                "    Jump to start of line from end of word preceded by whitespace",
+                vec![(1, Range::new(3, 4), Range::new(4, 0))],
+            ),
+            ("Previous anchor is irrelevant for backward motions",
+                vec![(1, Range::new(12, 5), Range::new(6, 0))]),
+            (
+                "    Starting from whitespace moves to first space in sequence",
+                vec![(1, Range::new(0, 4), Range::new(4, 0))],
+            ),
+            ("Identifiers_with_underscores are considered a single word",
+                vec![(1, Range::new(0, 20), Range::new(20, 0))]),
+            (
+                "Jumping\n    \nback through a newline selects whitespace",
+                vec![(1, Range::new(0, 13), Range::new(12, 8))],
+            ),
+            (
+                "Jumping to start of word from the end selects the word",
+                vec![(1, Range::new(6, 7), Range::new(7, 0))],
+            ),
+            (
+                "alphanumeric.!,and.?=punctuation are treated exactly the same",
+                vec![(1, Range::new(29, 30), Range::new(30, 0))],
+            ),
+            (
+                "...   ... punctuation and spaces behave as expected",
+                vec![
+                    (1, Range::new(0, 10), Range::new(9, 3)),
+                    (1, Range::new(10, 6), Range::new(7, 3)),
+                ],
+            ),
+            (".._.._ punctuation is joined by underscores into a single block",
+                vec![(1, Range::new(0, 6), Range::new(6, 0))]),
+            (
+                "Newlines\n\nare bridged seamlessly.",
+                vec![(1, Range::new(0, 10), Range::new(8, 0))],
+            ),
+            (
+                "Jumping    \n\n\n\n\nback from within a newline group selects previous block",
+                vec![(1, Range::new(0, 13), Range::new(11, 7))],
+            ),
+            (
+                "Failed motions do not modify the range",
+                vec![(0, Range::new(3, 0), Range::new(3, 0))],
+            ),
+            (
+                "Multiple motions at once resolve correctly",
+                vec![(3, Range::new(19, 19), Range::new(8, 0))],
+            ),
+            (
+                "Excessive motions are performed partially",
+                vec![(999, Range::new(40, 40), Range::new(9, 0))],
+            ),
+            (
+                "", // Edge case of moving backwards in empty string
+                vec![(1, Range::new(0, 0), Range::new(0, 0))],
+            ),
+            (
+                "\n\n\n\n\n", // Edge case of moving backwards in all newlines
+                vec![(1, Range::new(5, 5), Range::new(0, 0))],
+            ),
+            ("   \n   \nJumping back through alternated space blocks and newlines selects the space blocks",
+                vec![
+                    (1, Range::new(0, 8), Range::new(7, 4)),
+                    (1, Range::new(7, 4), Range::new(3, 0)),
+                ]),
+            ("ヒーリ..クス multibyte characters behave as normal characters, including when interacting with punctuation",
+                vec![
+                    (1, Range::new(0, 8), Range::new(7, 0)),
+                ]),
+        ];
+
+        for (sample, scenario) in tests {
+            for (count, begin, expected_end) in scenario.into_iter() {
+                let range = move_prev_long_word_end(Rope::from(sample).slice(..), begin, count);
+                assert_eq!(range, expected_end, "Case failed: [{}]", sample);
+            }
+        }
+    }
+
     #[test]
     fn test_behaviour_when_moving_to_prev_paragraph_single() {
         let tests = [

helix-core/src/path.rs

@@ -85,23 +85,21 @@ pub fn get_normalized_path(path: &Path) -> PathBuf {
 ///
 /// This function is used instead of `std::fs::canonicalize` because we don't want to verify
 /// here if the path exists, just normalize it's components.
-pub fn get_canonicalized_path(path: &Path) -> std::io::Result<PathBuf> {
+pub fn get_canonicalized_path(path: &Path) -> PathBuf {
     let path = expand_tilde(path);
     let path = if path.is_relative() {
-        std::env::current_dir().map(|current_dir| current_dir.join(path))?
+        helix_loader::current_working_dir().join(path)
     } else {
         path
     };
 
-    Ok(get_normalized_path(path.as_path()))
+    get_normalized_path(path.as_path())
 }
 
 pub fn get_relative_path(path: &Path) -> PathBuf {
     let path = PathBuf::from(path);
     let path = if path.is_absolute() {
-        let cwdir = std::env::current_dir()
-            .map(|path| get_normalized_path(&path))
-            .expect("couldn't determine current directory");
+        let cwdir = get_normalized_path(&helix_loader::current_working_dir());
         get_normalized_path(&path)
             .strip_prefix(cwdir)
             .map(PathBuf::from)
@@ -142,7 +140,7 @@ pub fn get_relative_path(path: &Path) -> PathBuf {
 /// ```
 ///
 pub fn get_truncated_path<P: AsRef<Path>>(path: P) -> PathBuf {
-    let cwd = std::env::current_dir().unwrap_or_default();
+    let cwd = helix_loader::current_working_dir();
     let path = path
         .as_ref()
         .strip_prefix(cwd)

helix-core/src/register.rs

@@ -1,81 +0,0 @@
-use std::collections::HashMap;
-
-#[derive(Debug)]
-pub struct Register {
-    name: char,
-    values: Vec<String>,
-}
-
-impl Register {
-    pub const fn new(name: char) -> Self {
-        Self {
-            name,
-            values: Vec::new(),
-        }
-    }
-
-    pub fn new_with_values(name: char, values: Vec<String>) -> Self {
-        Self { name, values }
-    }
-
-    pub const fn name(&self) -> char {
-        self.name
-    }
-
-    pub fn read(&self) -> &[String] {
-        &self.values
-    }
-
-    pub fn write(&mut self, values: Vec<String>) {
-        self.values = values;
-    }
-
-    pub fn push(&mut self, value: String) {
-        self.values.push(value);
-    }
-}
-
-/// Currently just wraps a `HashMap` of `Register`s
-#[derive(Debug, Default)]
-pub struct Registers {
-    inner: HashMap<char, Register>,
-}
-
-impl Registers {
-    pub fn get(&self, name: char) -> Option<&Register> {
-        self.inner.get(&name)
-    }
-
-    pub fn read(&self, name: char) -> Option<&[String]> {
-        self.get(name).map(|reg| reg.read())
-    }
-
-    pub fn write(&mut self, name: char, values: Vec<String>) {
-        if name != '_' {
-            self.inner
-                .insert(name, Register::new_with_values(name, values));
-        }
-    }
-
-    pub fn push(&mut self, name: char, value: String) {
-        if name != '_' {
-            if let Some(r) = self.inner.get_mut(&name) {
-                r.push(value);
-            } else {
-                self.write(name, vec![value]);
-            }
-        }
-    }
-
-    pub fn first(&self, name: char) -> Option<&String> {
-        self.read(name).and_then(|entries| entries.first())
-    }
-
-    pub fn last(&self, name: char) -> Option<&String> {
-        self.read(name).and_then(|entries| entries.last())
-    }
-
-    pub fn inner(&self) -> &HashMap<char, Register> {
-        &self.inner
-    }
-}

helix-core/src/rope_reader.rs

@@ -0,0 +1,37 @@
+use std::io;
+
+use ropey::iter::Chunks;
+use ropey::RopeSlice;
+
+pub struct RopeReader<'a> {
+    current_chunk: &'a [u8],
+    chunks: Chunks<'a>,
+}
+
+impl<'a> RopeReader<'a> {
+    pub fn new(rope: RopeSlice<'a>) -> RopeReader<'a> {
+        RopeReader {
+            current_chunk: &[],
+            chunks: rope.chunks(),
+        }
+    }
+}
+
+impl io::Read for RopeReader<'_> {
+    fn read(&mut self, mut buf: &mut [u8]) -> io::Result<usize> {
+        let buf_len = buf.len();
+        loop {
+            let read_bytes = self.current_chunk.read(buf)?;
+            buf = &mut buf[read_bytes..];
+            if buf.is_empty() {
+                return Ok(buf_len);
+            }
+
+            if let Some(next_chunk) = self.chunks.next() {
+                self.current_chunk = next_chunk.as_bytes();
+            } else {
+                return Ok(buf_len - buf.len());
+            }
+        }
+    }
+}

helix-core/src/selection.rs

@@ -161,34 +161,35 @@ impl Range {
         self.from() <= pos && pos < self.to()
     }
 
-    /// Map a range through a set of changes. Returns a new range representing the same position
-    /// after the changes are applied.
-    pub fn map(self, changes: &ChangeSet) -> Self {
+    /// Map a range through a set of changes. Returns a new range representing
+    /// the same position after the changes are applied. Note that this
+    /// function runs in O(N) (N is number of changes) and can therefore
+    /// cause performance problems if run for a large number of ranges as the
+    /// complexity is then O(MN) (for multicuror M=N usually). Instead use
+    /// [Selection::map] or [ChangeSet::update_positions] instead
+    pub fn map(mut self, changes: &ChangeSet) -> Self {
         use std::cmp::Ordering;
-        let (anchor, head) = match self.anchor.cmp(&self.head) {
-            Ordering::Equal => (
-                changes.map_pos(self.anchor, Assoc::After),
-                changes.map_pos(self.head, Assoc::After),
-            ),
-            Ordering::Less => (
-                changes.map_pos(self.anchor, Assoc::After),
-                changes.map_pos(self.head, Assoc::Before),
-            ),
-            Ordering::Greater => (
-                changes.map_pos(self.anchor, Assoc::Before),
-                changes.map_pos(self.head, Assoc::After),
-            ),
-        };
-
-        // We want to return a new `Range` with `horiz == None` every time,
-        // even if the anchor and head haven't changed, because we don't
-        // know if the *visual* position hasn't changed due to
-        // character-width or grapheme changes earlier in the text.
-        Self {
-            anchor,
-            head,
-            old_visual_position: None,
+        if changes.is_empty() {
+            return self;
         }
+
+        let positions_to_map = match self.anchor.cmp(&self.head) {
+            Ordering::Equal => [
+                (&mut self.anchor, Assoc::After),
+                (&mut self.head, Assoc::After),
+            ],
+            Ordering::Less => [
+                (&mut self.anchor, Assoc::After),
+                (&mut self.head, Assoc::Before),
+            ],
+            Ordering::Greater => [
+                (&mut self.head, Assoc::After),
+                (&mut self.anchor, Assoc::Before),
+            ],
+        };
+        changes.update_positions(positions_to_map.into_iter());
+        self.old_visual_position = None;
+        self
     }
 
     /// Extend the range to cover at least `from` `to`.
@@ -451,17 +452,36 @@ impl Selection {
     /// Map selections over a set of changes. Useful for adjusting the selection position after
     /// applying changes to a document.
     pub fn map(self, changes: &ChangeSet) -> Self {
+        self.map_no_normalize(changes).normalize()
+    }
+
+    /// Map selections over a set of changes. Useful for adjusting the selection position after
+    /// applying changes to a document. Doesn't normalize the selection
+    pub fn map_no_normalize(mut self, changes: &ChangeSet) -> Self {
         if changes.is_empty() {
             return self;
         }
 
-        Self::new(
-            self.ranges
-                .into_iter()
-                .map(|range| range.map(changes))
-                .collect(),
-            self.primary_index,
-        )
+        let positions_to_map = self.ranges.iter_mut().flat_map(|range| {
+            use std::cmp::Ordering;
+            range.old_visual_position = None;
+            match range.anchor.cmp(&range.head) {
+                Ordering::Equal => [
+                    (&mut range.anchor, Assoc::After),
+                    (&mut range.head, Assoc::After),
+                ],
+                Ordering::Less => [
+                    (&mut range.anchor, Assoc::After),
+                    (&mut range.head, Assoc::Before),
+                ],
+                Ordering::Greater => [
+                    (&mut range.head, Assoc::After),
+                    (&mut range.anchor, Assoc::Before),
+                ],
+            }
+        });
+        changes.update_positions(positions_to_map);
+        self
     }
 
     pub fn ranges(&self) -> &[Range] {
@@ -497,6 +517,9 @@ impl Selection {
 
     /// Normalizes a `Selection`.
     fn normalize(mut self) -> Self {
+        if self.len() < 2 {
+            return self;
+        }
         let mut primary = self.ranges[self.primary_index];
         self.ranges.sort_unstable_by_key(Range::from);
 
@@ -522,7 +545,14 @@ impl Selection {
         self
     }
 
-    // Merges all ranges that are consecutive
+    /// Replaces ranges with one spanning from first to last range.
+    pub fn merge_ranges(self) -> Self {
+        let first = self.ranges.first().unwrap();
+        let last = self.ranges.last().unwrap();
+        Selection::new(smallvec![first.merge(*last)], 0)
+    }
+
+    /// Merges all ranges that are consecutive.
     pub fn merge_consecutive_ranges(mut self) -> Self {
         let mut primary = self.ranges[self.primary_index];
 
@@ -554,17 +584,12 @@ impl Selection {
         assert!(!ranges.is_empty());
         debug_assert!(primary_index < ranges.len());
 
-        let mut selection = Self {
+        let selection = Self {
             ranges,
             primary_index,
         };
 
-        if selection.ranges.len() > 1 {
-            // TODO: only normalize if needed (any ranges out of order)
-            selection = selection.normalize();
-        }
-
-        selection
+        selection.normalize()
     }
 
     /// Takes a closure and maps each `Range` over the closure.
@@ -605,11 +630,19 @@ impl Selection {
         self.transform(|range| Range::point(range.cursor(text)))
     }
 
-    pub fn fragments<'a>(&'a self, text: RopeSlice<'a>) -> impl Iterator<Item = Cow<str>> + 'a {
+    pub fn fragments<'a>(
+        &'a self,
+        text: RopeSlice<'a>,
+    ) -> impl DoubleEndedIterator<Item = Cow<'a, str>> + ExactSizeIterator<Item = Cow<str>> + 'a
+    {
         self.ranges.iter().map(move |range| range.fragment(text))
     }
 
-    pub fn slices<'a>(&'a self, text: RopeSlice<'a>) -> impl Iterator<Item = RopeSlice> + 'a {
+    pub fn slices<'a>(
+        &'a self,
+        text: RopeSlice<'a>,
+    ) -> impl DoubleEndedIterator<Item = RopeSlice<'a>> + ExactSizeIterator<Item = RopeSlice<'a>> + 'a
+    {
         self.ranges.iter().map(move |range| range.slice(text))
     }
 

helix-core/src/surround.rs

@@ -397,15 +397,10 @@ mod test {
 
         let selections: SmallVec<[Range; 1]> = spec
             .match_indices('^')
-            .into_iter()
             .map(|(i, _)| Range::point(i))
             .collect();
 
-        let expectations: Vec<usize> = spec
-            .match_indices('_')
-            .into_iter()
-            .map(|(i, _)| i)
-            .collect();
+        let expectations: Vec<usize> = spec.match_indices('_').map(|(i, _)| i).collect();
 
         (rope, Selection::new(selections, 0), expectations)
     }

helix-core/src/syntax.rs

@@ -4,7 +4,7 @@ use crate::{
     diagnostic::Severity,
     regex::Regex,
     transaction::{ChangeSet, Operation},
-    Rope, RopeSlice, Tendril,
+    RopeSlice, Tendril,
 };
 
 use ahash::RandomState;
@@ -16,8 +16,8 @@ use slotmap::{DefaultKey as LayerId, HopSlotMap};
 use std::{
     borrow::Cow,
     cell::RefCell,
-    collections::{HashMap, VecDeque},
-    fmt,
+    collections::{HashMap, HashSet, VecDeque},
+    fmt::{self, Display},
     hash::{Hash, Hasher},
     mem::{replace, transmute},
     path::{Path, PathBuf},
@@ -26,7 +26,7 @@ use std::{
 };
 
 use once_cell::sync::{Lazy, OnceCell};
-use serde::{Deserialize, Serialize};
+use serde::{ser::SerializeSeq, Deserialize, Serialize};
 
 use helix_loader::grammar::{get_language, load_runtime_file};
 
@@ -48,6 +48,21 @@ where
         .transpose()
 }
 
+fn deserialize_tab_width<'de, D>(deserializer: D) -> Result<usize, D::Error>
+where
+    D: serde::Deserializer<'de>,
+{
+    usize::deserialize(deserializer).and_then(|n| {
+        if n > 0 && n <= 16 {
+            Ok(n)
+        } else {
+            Err(serde::de::Error::custom(
+                "tab width must be a value from 1 to 16 inclusive",
+            ))
+        }
+    })
+}
+
 pub fn deserialize_auto_pairs<'de, D>(deserializer: D) -> Result<Option<AutoPairs>, D::Error>
 where
     D: serde::Deserializer<'de>,
@@ -60,8 +75,11 @@ fn default_timeout() -> u64 {
 }
 
 #[derive(Debug, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
 pub struct Configuration {
     pub language: Vec<LanguageConfiguration>,
+    #[serde(default)]
+    pub language_server: HashMap<String, LanguageServerConfiguration>,
 }
 
 impl Default for Configuration {
@@ -75,7 +93,10 @@ impl Default for Configuration {
 #[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct LanguageConfiguration {
     #[serde(rename = "name")]
-    pub language_id: String, // c-sharp, rust
+    pub language_id: String, // c-sharp, rust, tsx
+    #[serde(rename = "language-id")]
+    // see the table under https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentItem
+    pub language_server_language_id: Option<String>, // csharp, rust, typescriptreact, for the language-server
     pub scope: String,             // source.rust
     pub file_types: Vec<FileType>, // filename extension or ends_with? <Gemfile, rb, etc>
     #[serde(default)]
@@ -85,9 +106,6 @@ pub struct LanguageConfiguration {
     pub text_width: Option<usize>,
     pub soft_wrap: Option<SoftWrap>,
 
-    #[serde(default, skip_serializing, deserialize_with = "deserialize_lsp_config")]
-    pub config: Option<serde_json::Value>,
-
     #[serde(default)]
     pub auto_format: bool,
 
@@ -107,8 +125,13 @@ pub struct LanguageConfiguration {
     #[serde(skip)]
     pub(crate) highlight_config: OnceCell<Option<Arc<HighlightConfiguration>>>,
     // tags_config OnceCell<> https://github.com/tree-sitter/tree-sitter/pull/583
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub language_server: Option<LanguageServerConfiguration>,
+    #[serde(
+        default,
+        skip_serializing_if = "Vec::is_empty",
+        serialize_with = "serialize_lang_features",
+        deserialize_with = "deserialize_lang_features"
+    )]
+    pub language_servers: Vec<LanguageServerFeatures>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub indent: Option<IndentationConfiguration>,
 
@@ -187,9 +210,12 @@ impl<'de> Deserialize<'de> for FileType {
                 M: serde::de::MapAccess<'de>,
             {
                 match map.next_entry::<String, String>()? {
-                    Some((key, suffix)) if key == "suffix" => Ok(FileType::Suffix(
-                        suffix.replace('/', &std::path::MAIN_SEPARATOR.to_string()),
-                    )),
+                    Some((key, suffix)) if key == "suffix" => Ok(FileType::Suffix({
+                        // FIXME: use `suffix.replace('/', std::path::MAIN_SEPARATOR_STR)`
+                        //        if MSRV is updated to 1.68
+                        let mut separator = [0; 1];
+                        suffix.replace('/', std::path::MAIN_SEPARATOR.encode_utf8(&mut separator))
+                    })),
                     Some((key, _value)) => Err(serde::de::Error::custom(format!(
                         "unknown key in `file-types` list: {}",
                         key
@@ -205,6 +231,133 @@ impl<'de> Deserialize<'de> for FileType {
     }
 }
 
+#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq, Hash)]
+#[serde(rename_all = "kebab-case")]
+pub enum LanguageServerFeature {
+    Format,
+    GotoDeclaration,
+    GotoDefinition,
+    GotoTypeDefinition,
+    GotoReference,
+    GotoImplementation,
+    // Goto, use bitflags, combining previous Goto members?
+    SignatureHelp,
+    Hover,
+    DocumentHighlight,
+    Completion,
+    CodeAction,
+    WorkspaceCommand,
+    DocumentSymbols,
+    WorkspaceSymbols,
+    // Symbols, use bitflags, see above?
+    Diagnostics,
+    RenameSymbol,
+    InlayHints,
+}
+
+impl Display for LanguageServerFeature {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use LanguageServerFeature::*;
+        let feature = match self {
+            Format => "format",
+            GotoDeclaration => "goto-declaration",
+            GotoDefinition => "goto-definition",
+            GotoTypeDefinition => "goto-type-definition",
+            GotoReference => "goto-type-definition",
+            GotoImplementation => "goto-implementation",
+            SignatureHelp => "signature-help",
+            Hover => "hover",
+            DocumentHighlight => "document-highlight",
+            Completion => "completion",
+            CodeAction => "code-action",
+            WorkspaceCommand => "workspace-command",
+            DocumentSymbols => "document-symbols",
+            WorkspaceSymbols => "workspace-symbols",
+            Diagnostics => "diagnostics",
+            RenameSymbol => "rename-symbol",
+            InlayHints => "inlay-hints",
+        };
+        write!(f, "{feature}",)
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(untagged, rename_all = "kebab-case", deny_unknown_fields)]
+enum LanguageServerFeatureConfiguration {
+    #[serde(rename_all = "kebab-case")]
+    Features {
+        #[serde(default, skip_serializing_if = "HashSet::is_empty")]
+        only_features: HashSet<LanguageServerFeature>,
+        #[serde(default, skip_serializing_if = "HashSet::is_empty")]
+        except_features: HashSet<LanguageServerFeature>,
+        name: String,
+    },
+    Simple(String),
+}
+
+#[derive(Debug, Default)]
+pub struct LanguageServerFeatures {
+    pub name: String,
+    pub only: HashSet<LanguageServerFeature>,
+    pub excluded: HashSet<LanguageServerFeature>,
+}
+
+impl LanguageServerFeatures {
+    pub fn has_feature(&self, feature: LanguageServerFeature) -> bool {
+        (self.only.is_empty() || self.only.contains(&feature)) && !self.excluded.contains(&feature)
+    }
+}
+
+fn deserialize_lang_features<'de, D>(
+    deserializer: D,
+) -> Result<Vec<LanguageServerFeatures>, D::Error>
+where
+    D: serde::Deserializer<'de>,
+{
+    let raw: Vec<LanguageServerFeatureConfiguration> = Deserialize::deserialize(deserializer)?;
+    let res = raw
+        .into_iter()
+        .map(|config| match config {
+            LanguageServerFeatureConfiguration::Simple(name) => LanguageServerFeatures {
+                name,
+                ..Default::default()
+            },
+            LanguageServerFeatureConfiguration::Features {
+                only_features,
+                except_features,
+                name,
+            } => LanguageServerFeatures {
+                name,
+                only: only_features,
+                excluded: except_features,
+            },
+        })
+        .collect();
+    Ok(res)
+}
+fn serialize_lang_features<S>(
+    map: &Vec<LanguageServerFeatures>,
+    serializer: S,
+) -> Result<S::Ok, S::Error>
+where
+    S: serde::Serializer,
+{
+    let mut serializer = serializer.serialize_seq(Some(map.len()))?;
+    for features in map {
+        let features = if features.only.is_empty() && features.excluded.is_empty() {
+            LanguageServerFeatureConfiguration::Simple(features.name.to_owned())
+        } else {
+            LanguageServerFeatureConfiguration::Features {
+                only_features: features.only.clone(),
+                except_features: features.excluded.clone(),
+                name: features.name.to_owned(),
+            }
+        };
+        serializer.serialize_element(&features)?;
+    }
+    serializer.end()
+}
+
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(rename_all = "kebab-case")]
 pub struct LanguageServerConfiguration {
@@ -214,9 +367,10 @@ pub struct LanguageServerConfiguration {
     pub args: Vec<String>,
     #[serde(default, skip_serializing_if = "HashMap::is_empty")]
     pub environment: HashMap<String, String>,
+    #[serde(default, skip_serializing, deserialize_with = "deserialize_lsp_config")]
+    pub config: Option<serde_json::Value>,
     #[serde(default = "default_timeout")]
     pub timeout: u64,
-    pub language_id: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -285,6 +439,7 @@ pub struct DebuggerQuirks {
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(rename_all = "kebab-case")]
 pub struct IndentationConfiguration {
+    #[serde(deserialize_with = "deserialize_tab_width")]
     pub tab_width: usize,
     pub unit: String,
 }
@@ -591,6 +746,8 @@ pub struct Loader {
     language_config_ids_by_suffix: HashMap<String, usize>,
     language_config_ids_by_shebang: HashMap<String, usize>,
 
+    language_server_configs: HashMap<String, LanguageServerConfiguration>,
+
     scopes: ArcSwap<Vec<String>>,
 }
 
@@ -598,6 +755,7 @@ impl Loader {
     pub fn new(config: Configuration) -> Self {
         let mut loader = Self {
             language_configs: Vec::new(),
+            language_server_configs: config.language_server,
             language_config_ids_by_extension: HashMap::new(),
             language_config_ids_by_suffix: HashMap::new(),
             language_config_ids_by_shebang: HashMap::new(),
@@ -660,11 +818,13 @@ impl Loader {
         // TODO: content_regex handling conflict resolution
     }
 
-    pub fn language_config_for_shebang(&self, source: &Rope) -> Option<Arc<LanguageConfiguration>> {
+    pub fn language_config_for_shebang(
+        &self,
+        source: RopeSlice,
+    ) -> Option<Arc<LanguageConfiguration>> {
         let line = Cow::from(source.line(0));
-        static SHEBANG_REGEX: Lazy<Regex> = Lazy::new(|| {
-            Regex::new(r"^#!\s*(?:\S*[/\\](?:env\s+(?:\-\S+\s+)*)?)?([^\s\.\d]+)").unwrap()
-        });
+        static SHEBANG_REGEX: Lazy<Regex> =
+            Lazy::new(|| Regex::new(&["^", SHEBANG].concat()).unwrap());
         let configuration_id = SHEBANG_REGEX
             .captures(&line)
             .and_then(|cap| self.language_config_ids_by_shebang.get(&cap[1]));
@@ -686,15 +846,14 @@ impl Loader {
             .cloned()
     }
 
-    pub fn language_configuration_for_injection_string(
-        &self,
-        string: &str,
-    ) -> Option<Arc<LanguageConfiguration>> {
+    /// Unlike language_config_for_language_id, which only returns Some for an exact id, this
+    /// function will perform a regex match on the given string to find the closest language match.
+    pub fn language_config_for_name(&self, name: &str) -> Option<Arc<LanguageConfiguration>> {
         let mut best_match_length = 0;
         let mut best_match_position = None;
         for (i, configuration) in self.language_configs.iter().enumerate() {
             if let Some(injection_regex) = &configuration.injection_regex {
-                if let Some(mat) = injection_regex.find(string) {
+                if let Some(mat) = injection_regex.find(name) {
                     let length = mat.end() - mat.start();
                     if length > best_match_length {
                         best_match_position = Some(i);
@@ -704,17 +863,30 @@ impl Loader {
             }
         }
 
-        if let Some(i) = best_match_position {
-            let configuration = &self.language_configs[i];
-            return Some(configuration.clone());
+        best_match_position.map(|i| self.language_configs[i].clone())
+    }
+
+    pub fn language_configuration_for_injection_string(
+        &self,
+        capture: &InjectionLanguageMarker,
+    ) -> Option<Arc<LanguageConfiguration>> {
+        match capture {
+            InjectionLanguageMarker::Name(string) => self.language_config_for_name(string),
+            InjectionLanguageMarker::Filename(file) => self.language_config_for_file_name(file),
+            InjectionLanguageMarker::Shebang(shebang) => {
+                self.language_config_for_language_id(shebang)
+            }
         }
-        None
     }
 
     pub fn language_configs(&self) -> impl Iterator<Item = &Arc<LanguageConfiguration>> {
         self.language_configs.iter()
     }
 
+    pub fn language_server_configs(&self) -> &HashMap<String, LanguageServerConfiguration> {
+        &self.language_server_configs
+    }
+
     pub fn set_scopes(&self, scopes: Vec<String>) {
         self.scopes.store(Arc::new(scopes));
 
@@ -758,7 +930,11 @@ fn byte_range_to_str(range: std::ops::Range<usize>, source: RopeSlice) -> Cow<st
 }
 
 impl Syntax {
-    pub fn new(source: &Rope, config: Arc<HighlightConfiguration>, loader: Arc<Loader>) -> Self {
+    pub fn new(
+        source: RopeSlice,
+        config: Arc<HighlightConfiguration>,
+        loader: Arc<Loader>,
+    ) -> Option<Self> {
         let root_layer = LanguageLayer {
             tree: None,
             config,
@@ -783,24 +959,26 @@ impl Syntax {
             loader,
         };
 
-        syntax
-            .update(source, source, &ChangeSet::new(source))
-            .unwrap();
+        let res = syntax.update(source, source, &ChangeSet::new(source));
 
-        syntax
+        if res.is_err() {
+            log::error!("TS parser failed, disabling TS for the current buffer: {res:?}");
+            return None;
+        }
+        Some(syntax)
     }
 
     pub fn update(
         &mut self,
-        old_source: &Rope,
-        source: &Rope,
+        old_source: RopeSlice,
+        source: RopeSlice,
         changeset: &ChangeSet,
     ) -> Result<(), Error> {
         let mut queue = VecDeque::new();
         queue.push_back(self.root);
 
         let scopes = self.loader.scopes.load();
-        let injection_callback = |language: &str| {
+        let injection_callback = |language: &InjectionLanguageMarker| {
             self.loader
                 .language_configuration_for_injection_string(language)
                 .and_then(|language_config| language_config.highlight_config(&scopes))
@@ -915,6 +1093,7 @@ impl Syntax {
 
         PARSER.with(|ts_parser| {
             let ts_parser = &mut ts_parser.borrow_mut();
+            ts_parser.parser.set_timeout_micros(1000 * 500); // half a second is pretty generours
             let mut cursor = ts_parser.cursors.pop().unwrap_or_else(QueryCursor::new);
             // TODO: might need to set cursor range
             cursor.set_byte_range(0..usize::MAX);
@@ -959,14 +1138,37 @@ impl Syntax {
                     layer.tree().root_node(),
                     RopeProvider(source_slice),
                 );
+                let mut combined_injections = vec![
+                    (None, Vec::new(), IncludedChildren::default());
+                    layer.config.combined_injections_patterns.len()
+                ];
                 let mut injections = Vec::new();
+                let mut last_injection_end = 0;
                 for mat in matches {
-                    let (language_name, content_node, included_children) = injection_for_match(
-                        &layer.config,
-                        &layer.config.injections_query,
-                        &mat,
-                        source_slice,
-                    );
+                    let (injection_capture, content_node, included_children) = layer
+                        .config
+                        .injection_for_match(&layer.config.injections_query, &mat, source_slice);
+
+                    // in case this is a combined injection save it for more processing later
+                    if let Some(combined_injection_idx) = layer
+                        .config
+                        .combined_injections_patterns
+                        .iter()
+                        .position(|&pattern| pattern == mat.pattern_index)
+                    {
+                        let entry = &mut combined_injections[combined_injection_idx];
+                        if injection_capture.is_some() {
+                            entry.0 = injection_capture;
+                        }
+                        if let Some(content_node) = content_node {
+                            if content_node.start_byte() >= last_injection_end {
+                                entry.1.push(content_node);
+                                last_injection_end = content_node.end_byte();
+                            }
+                        }
+                        entry.2 = included_children;
+                        continue;
+                    }
 
                     // Explicitly remove this match so that none of its other captures will remain
                     // in the stream of captures.
@@ -974,63 +1176,35 @@ impl Syntax {
 
                     // If a language is found with the given name, then add a new language layer
                     // to the highlighted document.
-                    if let (Some(language_name), Some(content_node)) = (language_name, content_node)
+                    if let (Some(injection_capture), Some(content_node)) =
+                        (injection_capture, content_node)
                     {
-                        if let Some(config) = (injection_callback)(&language_name) {
+                        if let Some(config) = (injection_callback)(&injection_capture) {
                             let ranges =
                                 intersect_ranges(&layer.ranges, &[content_node], included_children);
 
                             if !ranges.is_empty() {
+                                if content_node.start_byte() < last_injection_end {
+                                    continue;
+                                }
+                                last_injection_end = content_node.end_byte();
                                 injections.push((config, ranges));
                             }
                         }
                     }
                 }
 
-                // Process combined injections.
-                if let Some(combined_injections_query) = &layer.config.combined_injections_query {
-                    let mut injections_by_pattern_index =
-                        vec![
-                            (None, Vec::new(), IncludedChildren::default());
-                            combined_injections_query.pattern_count()
-                        ];
-                    let matches = cursor.matches(
-                        combined_injections_query,
-                        layer.tree().root_node(),
-                        RopeProvider(source_slice),
-                    );
-                    for mat in matches {
-                        let entry = &mut injections_by_pattern_index[mat.pattern_index];
-                        let (language_name, content_node, included_children) = injection_for_match(
-                            &layer.config,
-                            combined_injections_query,
-                            &mat,
-                            source_slice,
-                        );
-                        if language_name.is_some() {
-                            entry.0 = language_name;
-                        }
-                        if let Some(content_node) = content_node {
-                            entry.1.push(content_node);
-                        }
-                        entry.2 = included_children;
-                    }
-                    for (lang_name, content_nodes, included_children) in injections_by_pattern_index
-                    {
+                for (lang_name, content_nodes, included_children) in combined_injections {
                     if let (Some(lang_name), false) = (lang_name, content_nodes.is_empty()) {
                         if let Some(config) = (injection_callback)(&lang_name) {
-                                let ranges = intersect_ranges(
-                                    &layer.ranges,
-                                    &content_nodes,
-                                    included_children,
-                                );
+                            let ranges =
+                                intersect_ranges(&layer.ranges, &content_nodes, included_children);
                             if !ranges.is_empty() {
                                 injections.push((config, ranges));
                             }
                         }
                     }
                 }
-                }
 
                 let depth = layer.depth + 1;
                 // TODO: can't inline this since matches borrows self.layers
@@ -1216,7 +1390,7 @@ impl LanguageLayer {
         self.tree.as_ref().unwrap()
     }
 
-    fn parse(&mut self, parser: &mut Parser, source: &Rope) -> Result<(), Error> {
+    fn parse(&mut self, parser: &mut Parser, source: RopeSlice) -> Result<(), Error> {
         parser
             .set_included_ranges(&self.ranges)
             .map_err(|_| Error::InvalidRanges)?;
@@ -1231,7 +1405,7 @@ impl LanguageLayer {
                 &mut |byte, _| {
                     if byte <= source.len_bytes() {
                         let (chunk, start_byte, _, _) = source.chunk_at_byte(byte);
-                        chunk[byte - start_byte..].as_bytes()
+                        &chunk.as_bytes()[byte - start_byte..]
                     } else {
                         // out of range
                         &[]
@@ -1247,7 +1421,7 @@ impl LanguageLayer {
 }
 
 pub(crate) fn generate_edits(
-    old_text: &Rope,
+    old_text: RopeSlice,
     changeset: &ChangeSet,
 ) -> Vec<tree_sitter::InputEdit> {
     use Operation::*;
@@ -1263,7 +1437,7 @@ pub(crate) fn generate_edits(
 
     // TODO; this is a lot easier with Change instead of Operation.
 
-    fn point_at_pos(text: &Rope, pos: usize) -> (usize, Point) {
+    fn point_at_pos(text: RopeSlice, pos: usize) -> (usize, Point) {
         let byte = text.char_to_byte(pos); // <- attempted to index past end
         let line = text.char_to_line(pos);
         let line_start_byte = text.line_to_byte(line);
@@ -1389,12 +1563,14 @@ pub struct HighlightConfiguration {
     pub language: Grammar,
     pub query: Query,
     injections_query: Query,
-    combined_injections_query: Option<Query>,
+    combined_injections_patterns: Vec<usize>,
     highlights_pattern_index: usize,
     highlight_indices: ArcSwap<Vec<Option<Highlight>>>,
     non_local_variable_patterns: Vec<bool>,
     injection_content_capture_index: Option<u32>,
     injection_language_capture_index: Option<u32>,
+    injection_filename_capture_index: Option<u32>,
+    injection_shebang_capture_index: Option<u32>,
     local_scope_capture_index: Option<u32>,
     local_def_capture_index: Option<u32>,
     local_def_value_capture_index: Option<u32>,
@@ -1438,7 +1614,7 @@ impl<'a> Iterator for ChunksBytes<'a> {
 }
 
 pub struct RopeProvider<'a>(pub RopeSlice<'a>);
-impl<'a> TextProvider<'a> for RopeProvider<'a> {
+impl<'a> TextProvider<&'a [u8]> for RopeProvider<'a> {
     type I = ChunksBytes<'a>;
 
     fn text(&mut self, node: Node) -> Self::I {
@@ -1452,7 +1628,7 @@ impl<'a> TextProvider<'a> for RopeProvider<'a> {
 struct HighlightIterLayer<'a> {
     _tree: Option<Tree>,
     cursor: QueryCursor,
-    captures: RefCell<iter::Peekable<QueryCaptures<'a, 'a, RopeProvider<'a>>>>,
+    captures: RefCell<iter::Peekable<QueryCaptures<'a, 'a, RopeProvider<'a>, &'a [u8]>>>,
     config: &'a HighlightConfiguration,
     highlight_end_stack: Vec<usize>,
     scope_stack: Vec<LocalScope<'a>>,
@@ -1503,26 +1679,15 @@ impl HighlightConfiguration {
             }
         }
 
-        let mut injections_query = Query::new(language, injection_query)?;
-
-        // Construct a separate query just for dealing with the 'combined injections'.
-        // Disable the combined injection patterns in the main query.
-        let mut combined_injections_query = Query::new(language, injection_query)?;
-        let mut has_combined_queries = false;
-        for pattern_index in 0..injections_query.pattern_count() {
-            let settings = injections_query.property_settings(pattern_index);
-            if settings.iter().any(|s| &*s.key == "injection.combined") {
-                has_combined_queries = true;
-                injections_query.disable_pattern(pattern_index);
-            } else {
-                combined_injections_query.disable_pattern(pattern_index);
-            }
-        }
-        let combined_injections_query = if has_combined_queries {
-            Some(combined_injections_query)
-        } else {
-            None
-        };
+        let injections_query = Query::new(language, injection_query)?;
+        let combined_injections_patterns = (0..injections_query.pattern_count())
+            .filter(|&i| {
+                injections_query
+                    .property_settings(i)
+                    .iter()
+                    .any(|s| &*s.key == "injection.combined")
+            })
+            .collect();
 
         // Find all of the highlighting patterns that are disabled for nodes that
         // have been identified as local variables.
@@ -1538,6 +1703,8 @@ impl HighlightConfiguration {
         // Store the numeric ids for all of the special captures.
         let mut injection_content_capture_index = None;
         let mut injection_language_capture_index = None;
+        let mut injection_filename_capture_index = None;
+        let mut injection_shebang_capture_index = None;
         let mut local_def_capture_index = None;
         let mut local_def_value_capture_index = None;
         let mut local_ref_capture_index = None;
@@ -1558,6 +1725,8 @@ impl HighlightConfiguration {
             match name.as_str() {
                 "injection.content" => injection_content_capture_index = i,
                 "injection.language" => injection_language_capture_index = i,
+                "injection.filename" => injection_filename_capture_index = i,
+                "injection.shebang" => injection_shebang_capture_index = i,
                 _ => {}
             }
         }
@@ -1567,12 +1736,14 @@ impl HighlightConfiguration {
             language,
             query,
             injections_query,
-            combined_injections_query,
+            combined_injections_patterns,
             highlights_pattern_index,
             highlight_indices,
             non_local_variable_patterns,
             injection_content_capture_index,
             injection_language_capture_index,
+            injection_filename_capture_index,
+            injection_shebang_capture_index,
             local_scope_capture_index,
             local_def_capture_index,
             local_def_value_capture_index,
@@ -1631,6 +1802,90 @@ impl HighlightConfiguration {
 
         self.highlight_indices.store(Arc::new(indices));
     }
+
+    fn injection_pair<'a>(
+        &self,
+        query_match: &QueryMatch<'a, 'a>,
+        source: RopeSlice<'a>,
+    ) -> (Option<InjectionLanguageMarker<'a>>, Option<Node<'a>>) {
+        let mut injection_capture = None;
+        let mut content_node = None;
+
+        for capture in query_match.captures {
+            let index = Some(capture.index);
+            if index == self.injection_language_capture_index {
+                let name = byte_range_to_str(capture.node.byte_range(), source);
+                injection_capture = Some(InjectionLanguageMarker::Name(name));
+            } else if index == self.injection_filename_capture_index {
+                let name = byte_range_to_str(capture.node.byte_range(), source);
+                let path = Path::new(name.as_ref()).to_path_buf();
+                injection_capture = Some(InjectionLanguageMarker::Filename(path.into()));
+            } else if index == self.injection_shebang_capture_index {
+                let node_slice = source.byte_slice(capture.node.byte_range());
+
+                // some languages allow space and newlines before the actual string content
+                // so a shebang could be on either the first or second line
+                let lines = if let Ok(end) = node_slice.try_line_to_byte(2) {
+                    node_slice.byte_slice(..end)
+                } else {
+                    node_slice
+                };
+
+                static SHEBANG_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(SHEBANG).unwrap());
+
+                injection_capture = SHEBANG_REGEX
+                    .captures(&Cow::from(lines))
+                    .map(|cap| InjectionLanguageMarker::Shebang(cap[1].to_owned()))
+            } else if index == self.injection_content_capture_index {
+                content_node = Some(capture.node);
+            }
+        }
+        (injection_capture, content_node)
+    }
+
+    fn injection_for_match<'a>(
+        &self,
+        query: &'a Query,
+        query_match: &QueryMatch<'a, 'a>,
+        source: RopeSlice<'a>,
+    ) -> (
+        Option<InjectionLanguageMarker<'a>>,
+        Option<Node<'a>>,
+        IncludedChildren,
+    ) {
+        let (mut injection_capture, content_node) = self.injection_pair(query_match, source);
+
+        let mut included_children = IncludedChildren::default();
+        for prop in query.property_settings(query_match.pattern_index) {
+            match prop.key.as_ref() {
+                // In addition to specifying the language name via the text of a
+                // captured node, it can also be hard-coded via a `#set!` predicate
+                // that sets the injection.language key.
+                "injection.language" if injection_capture.is_none() => {
+                    injection_capture = prop
+                        .value
+                        .as_ref()
+                        .map(|s| InjectionLanguageMarker::Name(s.as_ref().into()));
+                }
+
+                // By default, injections do not include the *children* of an
+                // `injection.content` node - only the ranges that belong to the
+                // node itself. This can be changed using a `#set!` predicate that
+                // sets the `injection.include-children` key.
+                "injection.include-children" => included_children = IncludedChildren::All,
+
+                // Some queries might only exclude named children but include unnamed
+                // children in their `injection.content` node. This can be enabled using
+                // a `#set!` predicate that sets the `injection.include-unnamed-children` key.
+                "injection.include-unnamed-children" => {
+                    included_children = IncludedChildren::Unnamed
+                }
+                _ => {}
+            }
+        }
+
+        (injection_capture, content_node, included_children)
+    }
 }
 
 impl<'a> HighlightIterLayer<'a> {
@@ -2042,55 +2297,14 @@ impl<'a> Iterator for HighlightIter<'a> {
     }
 }
 
-fn injection_for_match<'a>(
-    config: &HighlightConfiguration,
-    query: &'a Query,
-    query_match: &QueryMatch<'a, 'a>,
-    source: RopeSlice<'a>,
-) -> (Option<Cow<'a, str>>, Option<Node<'a>>, IncludedChildren) {
-    let content_capture_index = config.injection_content_capture_index;
-    let language_capture_index = config.injection_language_capture_index;
-
-    let mut language_name = None;
-    let mut content_node = None;
-    for capture in query_match.captures {
-        let index = Some(capture.index);
-        if index == language_capture_index {
-            let name = byte_range_to_str(capture.node.byte_range(), source);
-            language_name = Some(name);
-        } else if index == content_capture_index {
-            content_node = Some(capture.node);
-        }
+#[derive(Debug, Clone)]
+pub enum InjectionLanguageMarker<'a> {
+    Name(Cow<'a, str>),
+    Filename(Cow<'a, Path>),
+    Shebang(String),
 }
 
-    let mut included_children = IncludedChildren::default();
-    for prop in query.property_settings(query_match.pattern_index) {
-        match prop.key.as_ref() {
-            // In addition to specifying the language name via the text of a
-            // captured node, it can also be hard-coded via a `#set!` predicate
-            // that sets the injection.language key.
-            "injection.language" => {
-                if language_name.is_none() {
-                    language_name = prop.value.as_ref().map(|s| s.as_ref().into())
-                }
-            }
-
-            // By default, injections do not include the *children* of an
-            // `injection.content` node - only the ranges that belong to the
-            // node itself. This can be changed using a `#set!` predicate that
-            // sets the `injection.include-children` key.
-            "injection.include-children" => included_children = IncludedChildren::All,
-
-            // Some queries might only exclude named children but include unnamed
-            // children in their `injection.content` node. This can be enabled using
-            // a `#set!` predicate that sets the `injection.include-unnamed-children` key.
-            "injection.include-unnamed-children" => included_children = IncludedChildren::Unnamed,
-            _ => {}
-        }
-    }
-
-    (language_name, content_node, included_children)
-}
+const SHEBANG: &str = r"#!\s*(?:\S*[/\\](?:env\s+(?:\-\S+\s+)*)?)?([^\s\.\d]+)";
 
 pub struct Merge<I> {
     iter: I,
@@ -2307,7 +2521,10 @@ mod test {
         "#,
         );
 
-        let loader = Loader::new(Configuration { language: vec![] });
+        let loader = Loader::new(Configuration {
+            language: vec![],
+            language_server: HashMap::new(),
+        });
         let language = get_language("rust").unwrap();
 
         let query = Query::new(language, query_str).unwrap();
@@ -2315,7 +2532,7 @@ mod test {
         let mut cursor = QueryCursor::new();
 
         let config = HighlightConfiguration::new(language, "", "", "").unwrap();
-        let syntax = Syntax::new(&source, Arc::new(config), Arc::new(loader));
+        let syntax = Syntax::new(source.slice(..), Arc::new(config), Arc::new(loader)).unwrap();
 
         let root = syntax.tree().root_node();
         let mut test = |capture, range| {
@@ -2366,7 +2583,10 @@ mod test {
         .map(String::from)
         .collect();
 
-        let loader = Loader::new(Configuration { language: vec![] });
+        let loader = Loader::new(Configuration {
+            language: vec![],
+            language_server: HashMap::new(),
+        });
 
         let language = get_language("rust").unwrap();
         let config = HighlightConfiguration::new(
@@ -2386,7 +2606,7 @@ mod test {
             fn main() {}
         ",
         );
-        let syntax = Syntax::new(&source, Arc::new(config), Arc::new(loader));
+        let syntax = Syntax::new(source.slice(..), Arc::new(config), Arc::new(loader)).unwrap();
         let tree = syntax.tree();
         let root = tree.root_node();
         assert_eq!(root.kind(), "source_file");
@@ -2413,7 +2633,7 @@ mod test {
             &doc,
             vec![(6, 11, Some("test".into())), (12, 17, None)].into_iter(),
         );
-        let edits = generate_edits(&doc, transaction.changes());
+        let edits = generate_edits(doc.slice(..), transaction.changes());
         // transaction.apply(&mut state);
 
         assert_eq!(
@@ -2442,7 +2662,7 @@ mod test {
         let mut doc = Rope::from("fn test() {}");
         let transaction =
             Transaction::change(&doc, vec![(8, 8, Some("a: u32".into()))].into_iter());
-        let edits = generate_edits(&doc, transaction.changes());
+        let edits = generate_edits(doc.slice(..), transaction.changes());
         transaction.apply(&mut doc);
 
         assert_eq!(doc, "fn test(a: u32) {}");
@@ -2469,11 +2689,14 @@ mod test {
     ) {
         let source = Rope::from_str(source);
 
-        let loader = Loader::new(Configuration { language: vec![] });
+        let loader = Loader::new(Configuration {
+            language: vec![],
+            language_server: HashMap::new(),
+        });
         let language = get_language(language_name).unwrap();
 
         let config = HighlightConfiguration::new(language, "", "", "").unwrap();
-        let syntax = Syntax::new(&source, Arc::new(config), Arc::new(loader));
+        let syntax = Syntax::new(source.slice(..), Arc::new(config), Arc::new(loader)).unwrap();
 
         let root = syntax
             .tree()

helix-core/src/transaction.rs

@@ -1,10 +1,12 @@
+use ropey::RopeSlice;
 use smallvec::SmallVec;
 
 use crate::{Range, Rope, Selection, Tendril};
-use std::borrow::Cow;
+use std::{borrow::Cow, iter::once};
 
 /// (from, to, replacement)
 pub type Change = (usize, usize, Option<Tendril>);
+pub type Deletion = (usize, usize);
 
 // TODO: pub(crate)
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -41,7 +43,7 @@ impl ChangeSet {
     }
 
     #[must_use]
-    pub fn new(doc: &Rope) -> Self {
+    pub fn new(doc: RopeSlice) -> Self {
         let len = doc.len_chars();
         Self {
             changes: Vec::new(),
@@ -325,20 +327,75 @@ impl ChangeSet {
         self.changes.is_empty() || self.changes == [Operation::Retain(self.len)]
     }
 
-    /// Map a position through the changes.
+    /// Map a (mostly) *sorted* list of positions through the changes.
     ///
-    /// `assoc` indicates which size to associate the position with. `Before` will keep the
-    /// position close to the character before, and will place it before insertions over that
-    /// range, or at that point. `After` will move it forward, placing it at the end of such
-    /// insertions.
-    pub fn map_pos(&self, pos: usize, assoc: Assoc) -> usize {
+    /// This is equivalent to updating each position with `map_pos`:
+    ///
+    /// ``` no-compile
+    /// for (pos, assoc) in positions {
+    ///     *pos = changes.map_pos(*pos, assoc);
+    /// }
+    /// ```
+    /// However this function is significantly faster for sorted lists running
+    /// in `O(N+M)` instead of `O(NM)`. This function also handles unsorted/
+    /// partially sorted lists. However, in that case worst case complexity is
+    /// again `O(MN)`.  For lists that are often/mostly sorted (like the end of diagnostic ranges)
+    /// performance is usally close to `O(N + M)`
+    pub fn update_positions<'a>(&self, positions: impl Iterator<Item = (&'a mut usize, Assoc)>) {
         use Operation::*;
+
+        let mut positions = positions.peekable();
+
         let mut old_pos = 0;
         let mut new_pos = 0;
+        let mut iter = self.changes.iter().enumerate().peekable();
+
+        'outer: loop {
+            macro_rules! map {
+                ($map: expr, $i: expr) => {
+                    loop {
+                        let Some((pos, assoc)) = positions.peek_mut() else { return; };
+                        if **pos < old_pos {
+                            // Positions are not sorted, revert to the last Operation that
+                            // contains this position and continue iterating from there.
+                            // We can unwrap here since `pos` can not be negative
+                            // (unsigned integer) and iterating backwards to the start
+                            // should always move us back to the start
+                            for (i, change) in self.changes[..$i].iter().enumerate().rev() {
+                                match change {
+                                    Retain(i) => {
+                                        old_pos -= i;
+                                        new_pos -= i;
+                                    }
+                                    Delete(i) => {
+                                        old_pos -= i;
+                                    }
+                                    Insert(ins) => {
+                                        new_pos -= ins.chars().count();
+                                    }
+                                }
+                                if old_pos <= **pos {
+                                    iter = self.changes[i..].iter().enumerate().peekable();
+                                }
+                            }
+                            debug_assert!(old_pos <= **pos, "Reverse Iter across changeset works");
+                            continue 'outer;
+                        }
+                        let Some(new_pos) = $map(**pos, *assoc) else { break; };
+                        **pos = new_pos;
+                        positions.next();
+                    }
+                };
+            }
 
-        let mut iter = self.changes.iter().peekable();
+            let Some((i, change)) = iter.next() else {
+                map!(
+                    |pos, _| (old_pos == pos).then_some(new_pos),
+                    self.changes.len()
+                );
+                break;
+            };
 
-        while let Some(change) = iter.next() {
             let len = match change {
                 Delete(i) | Retain(i) => *i,
                 Insert(_) => 0,
@@ -347,46 +404,51 @@ impl ChangeSet {
 
             match change {
                 Retain(_) => {
-                    if old_end > pos {
-                        return new_pos + (pos - old_pos);
-                    }
+                    map!(
+                        |pos, _| (old_end > pos).then_some(new_pos + (pos - old_pos)),
+                        i
+                    );
                     new_pos += len;
                 }
                 Delete(_) => {
                     // in range
-                    if old_end > pos {
-                        return new_pos;
-                    }
+                    map!(|pos, _| (old_end > pos).then_some(new_pos), i);
                 }
                 Insert(s) => {
                     let ins = s.chars().count();
 
                     // a subsequent delete means a replace, consume it
-                    if let Some(Delete(len)) = iter.peek() {
+                    if let Some((_, Delete(len))) = iter.peek() {
                         iter.next();
 
                         old_end = old_pos + len;
                         // in range of replaced text
-                        if old_end > pos {
+                        map!(
+                            |pos, assoc| (old_end > pos).then(|| {
                                 // at point or tracking before
                                 if pos == old_pos || assoc == Assoc::Before {
-                                return new_pos;
+                                    new_pos
                                 } else {
                                     // place to end of insert
-                                return new_pos + ins;
-                            }
+                                    new_pos + ins
                                 }
+                            }),
+                            i
+                        );
                     } else {
                         // at insert point
-                        if old_pos == pos {
+                        map!(
+                            |pos, assoc| (old_pos == pos).then(|| {
                                 // return position before inserted text
                                 if assoc == Assoc::Before {
-                                return new_pos;
+                                    new_pos
                                 } else {
                                     // after text
-                                return new_pos + ins;
-                            }
+                                    new_pos + ins
                                 }
+                            }),
+                            i
+                        );
                     }
 
                     new_pos += ins;
@@ -394,14 +456,20 @@ impl ChangeSet {
             }
             old_pos = old_end;
         }
+        let out_of_bounds: Vec<_> = positions.collect();
 
-        if pos > old_pos {
-            panic!(
-                "Position {} is out of range for changeset len {}!",
-                pos, old_pos
-            )
+        panic!("Positions {out_of_bounds:?} are out of range for changeset len {old_pos}!",)
     }
-        new_pos
+
+    /// Map a position through the changes.
+    ///
+    /// `assoc` indicates which side to associate the position with. `Before` will keep the
+    /// position close to the character before, and will place it before insertions over that
+    /// range, or at that point. `After` will move it forward, placing it at the end of such
+    /// insertions.
+    pub fn map_pos(&self, mut pos: usize, assoc: Assoc) -> usize {
+        self.update_positions(once((&mut pos, assoc)));
+        pos
     }
 
     pub fn changes_iter(&self) -> ChangeIterator {
@@ -421,7 +489,7 @@ impl Transaction {
     /// Create a new, empty transaction.
     pub fn new(doc: &Rope) -> Self {
         Self {
-            changes: ChangeSet::new(doc),
+            changes: ChangeSet::new(doc.slice(..)),
             selection: None,
         }
     }
@@ -534,6 +602,46 @@ impl Transaction {
         Self::from(changeset)
     }
 
+    /// Generate a transaction from a set of potentially overlapping deletions
+    /// by merging overlapping deletions together.
+    pub fn delete<I>(doc: &Rope, deletions: I) -> Self
+    where
+        I: Iterator<Item = Deletion>,
+    {
+        let len = doc.len_chars();
+
+        let (lower, upper) = deletions.size_hint();
+        let size = upper.unwrap_or(lower);
+        let mut changeset = ChangeSet::with_capacity(2 * size + 1); // rough estimate
+
+        let mut last = 0;
+        for (mut from, to) in deletions {
+            if last > to {
+                continue;
+            }
+            if last > from {
+                from = last
+            }
+            debug_assert!(
+                from <= to,
+                "Edit end must end before it starts (should {from} <= {to})"
+            );
+            // Retain from last "to" to current "from"
+            changeset.retain(from - last);
+            changeset.delete(to - from);
+            last = to;
+        }
+
+        changeset.retain(len - last);
+
+        Self::from(changeset)
+    }
+
+    pub fn insert_at_eof(mut self, text: Tendril) -> Transaction {
+        self.changes.insert(text);
+        self
+    }
+
     /// Generate a transaction with a change per selection range.
     pub fn change_by_selection<F>(doc: &Rope, selection: &Selection, f: F) -> Self
     where
@@ -580,6 +688,16 @@ impl Transaction {
         )
     }
 
+    /// Generate a transaction with a deletion per selection range.
+    /// Compared to using `change_by_selection` directly these ranges may overlap.
+    /// In that case they are merged
+    pub fn delete_by_selection<F>(doc: &Rope, selection: &Selection, f: F) -> Self
+    where
+        F: FnMut(&Range) -> Deletion,
+    {
+        Self::delete(doc, selection.iter().map(f))
+    }
+
     /// Insert text at each selection head.
     pub fn insert(doc: &Rope, selection: &Selection, text: Tendril) -> Self {
         Self::change_by_selection(doc, selection, |range| {
@@ -752,6 +870,20 @@ mod test {
         };
         assert_eq!(cs.map_pos(2, Assoc::Before), 2);
         assert_eq!(cs.map_pos(2, Assoc::After), 2);
+        // unsorted selection
+        let cs = ChangeSet {
+            changes: vec![
+                Insert("ab".into()),
+                Delete(2),
+                Insert("cd".into()),
+                Delete(2),
+            ],
+            len: 4,
+            len_after: 4,
+        };
+        let mut positions = [4, 2];
+        cs.update_positions(positions.iter_mut().map(|pos| (pos, Assoc::After)));
+        assert_eq!(positions, [4, 2]);
     }
 
     #[test]
@@ -818,9 +950,9 @@ mod test {
     #[test]
     fn combine_with_empty() {
         let empty = Rope::from("");
-        let a = ChangeSet::new(&empty);
+        let a = ChangeSet::new(empty.slice(..));
 
-        let mut b = ChangeSet::new(&empty);
+        let mut b = ChangeSet::new(empty.slice(..));
         b.insert("a".into());
 
         let changes = a.compose(b);
@@ -834,9 +966,9 @@ mod test {
         const TEST_CASE: &str = "Hello, これはヘリックスエディターです！";
 
         let empty = Rope::from("");
-        let a = ChangeSet::new(&empty);
+        let a = ChangeSet::new(empty.slice(..));
 
-        let mut b = ChangeSet::new(&empty);
+        let mut b = ChangeSet::new(empty.slice(..));
         b.insert(TEST_CASE.into());
 
         let changes = a.compose(b);

helix-core/tests/data/indent/cpp.cpp

@@ -0,0 +1,48 @@
+std::vector<std::string>
+fn_with_many_parameters(int parm1, long parm2, float parm3, double parm4,
+                        char* parm5, bool parm6);
+
+std::vector<std::string>
+fn_with_many_parameters(int parm1, long parm2, float parm3, double parm4,
+                        char* parm5, bool parm6) {
+  auto lambda = []() {
+    return 0;
+  };
+  auto lambda_with_a_really_long_name_that_uses_a_whole_line
+    = [](int some_more_aligned_parameters,
+         std::string parm2) {
+      do_smth();
+    };
+  if (brace_on_same_line) {
+    do_smth();
+  } else if (brace_on_next_line)
+  {
+    do_smth();
+  } else if (another_condition) {
+    do_smth();
+  }
+  else {
+    do_smth();
+  }
+  if (inline_if_statement)
+    do_smth();
+  if (another_inline_if_statement)
+    return [](int parm1, char* parm2) {
+      this_is_a_really_pointless_lambda();
+    };
+
+  switch (var) {
+  case true:
+    return -1;
+  case false:
+    return 42;
+  }
+}
+
+class MyClass : public MyBaseClass {
+public:
+  MyClass();
+  void public_fn();
+private:
+  super_secret_private_fn();
+}

helix-core/tests/data/indent/indent.rs

@@ -1 +0,0 @@
-../../../src/indent.rs

helix-core/tests/data/indent/languages.toml

@@ -11,3 +11,16 @@ indent = { tab-width = 4, unit = "    " }
 [[grammar]]
 name = "rust"
 source = { git = "https://github.com/tree-sitter/tree-sitter-rust", rev = "0431a2c60828731f27491ee9fdefe25e250ce9c9" }
+
+[[language]]
+name = "cpp"
+scope = "source.cpp"
+injection-regex = "cpp"
+file-types = ["cc", "hh", "c++", "cpp", "hpp", "h", "ipp", "tpp", "cxx", "hxx", "ixx", "txx", "ino", "C", "H"]
+roots = []
+comment-token = "//"
+indent = { tab-width = 2, unit = "  " }
+
+[[grammar]]
+name = "cpp"
+source = { git = "https://github.com/tree-sitter/tree-sitter-cpp", rev = "2d2c4aee8672af4c7c8edff68e7dd4c07e88d2b1" }

helix-core/tests/indent.rs

@@ -1,20 +1,122 @@
 use helix_core::{
     indent::{indent_level_for_line, treesitter_indent_for_pos, IndentStyle},
-    syntax::Loader,
+    syntax::{Configuration, Loader},
     Syntax,
 };
-use std::path::PathBuf;
+use ropey::Rope;
+use std::{ops::Range, path::PathBuf, process::Command};
 
 #[test]
 fn test_treesitter_indent_rust() {
-    test_treesitter_indent("rust.rs", "source.rust");
+    standard_treesitter_test("rust.rs", "source.rust");
 }
+
+#[test]
+fn test_treesitter_indent_cpp() {
+    standard_treesitter_test("cpp.cpp", "source.cpp");
+}
+
 #[test]
-fn test_treesitter_indent_rust_2() {
-    test_treesitter_indent("indent.rs", "source.rust");
-    // TODO Use commands.rs as indentation test.
-    // Currently this fails because we can't align the parameters of a closure yet
-    // test_treesitter_indent("commands.rs", "source.rust");
+fn test_treesitter_indent_rust_helix() {
+    // We pin a specific git revision to prevent unrelated changes from causing the indent tests to fail.
+    // Ideally, someone updates this once in a while and fixes any errors that occur.
+    let rev = "af382768cdaf89ff547dbd8f644a1bddd90e7c8f";
+    let files = Command::new("git")
+        .args([
+            "ls-tree",
+            "-r",
+            "--name-only",
+            "--full-tree",
+            rev,
+            "helix-term/src",
+        ])
+        .output()
+        .unwrap();
+    let files = String::from_utf8(files.stdout).unwrap();
+
+    let ignored_files = vec![
+        // Contains many macros that tree-sitter does not parse in a meaningful way and is otherwise not very interesting
+        "helix-term/src/health.rs",
+    ];
+
+    for file in files.split_whitespace() {
+        if ignored_files.contains(&file) {
+            continue;
+        }
+        let ignored_lines: Vec<Range<usize>> = match file {
+            "helix-term/src/application.rs" => vec![
+                // We can't handle complicated indent rules inside macros (`json!` in this case) since
+                // the tree-sitter grammar only parses them as `token_tree` and `identifier` nodes.
+                1045..1051,
+            ],
+            "helix-term/src/commands.rs" => vec![
+                // This is broken because of the current handling of `call_expression`
+                // (i.e. having an indent query for it but outdenting again in specific cases).
+                // The indent query is needed to correctly handle multi-line arguments in function calls
+                // inside indented `field_expression` nodes (which occurs fairly often).
+                //
+                // Once we have the `@indent.always` capture type, it might be possible to just have an indent
+                // capture for the `arguments` field of a call expression. That could enable us to correctly
+                // handle this.
+                2226..2230,
+            ],
+            "helix-term/src/commands/dap.rs" => vec![
+                // Complex `format!` macro
+                46..52,
+            ],
+            "helix-term/src/commands/lsp.rs" => vec![
+                // Macro
+                624..627,
+                // Return type declaration of a closure. `cargo fmt` adds an additional space here,
+                // which we cannot (yet) model with our indent queries.
+                878..879,
+                // Same as in `helix-term/src/commands.rs`
+                1335..1343,
+            ],
+            "helix-term/src/config.rs" => vec![
+                // Multiline string
+                146..152,
+            ],
+            "helix-term/src/keymap.rs" => vec![
+                // Complex macro (see above)
+                456..470,
+                // Multiline string without indent
+                563..567,
+            ],
+            "helix-term/src/main.rs" => vec![
+                // Multiline string
+                44..70,
+            ],
+            "helix-term/src/ui/completion.rs" => vec![
+                // Macro
+                218..232,
+            ],
+            "helix-term/src/ui/editor.rs" => vec![
+                // The chained function calls here are not indented, probably because of the comment
+                // in between. Since `cargo fmt` doesn't even attempt to format it, there's probably
+                // no point in trying to indent this correctly.
+                342..350,
+            ],
+            "helix-term/src/ui/lsp.rs" => vec![
+                // Macro
+                56..61,
+            ],
+            "helix-term/src/ui/statusline.rs" => vec![
+                // Same as in `helix-term/src/commands.rs`
+                436..442,
+                450..456,
+            ],
+            _ => Vec::new(),
+        };
+
+        let git_object = rev.to_string() + ":" + file;
+        let content = Command::new("git")
+            .args(["cat-file", "blob", &git_object])
+            .output()
+            .unwrap();
+        let doc = Rope::from_reader(&mut content.stdout.as_slice()).unwrap();
+        test_treesitter_indent(file, doc, "source.rust", ignored_lines);
+    }
 }
 
 #[test]
@@ -50,20 +152,41 @@ fn test_indent_level_for_line_with_spaces_and_tabs() {
     assert_eq!(indent_level, 2)
 }
 
-fn test_treesitter_indent(file_name: &str, lang_scope: &str) {
+fn indent_tests_dir() -> PathBuf {
     let mut test_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
     test_dir.push("tests/data/indent");
+    test_dir
+}
+
+fn indent_test_path(name: &str) -> PathBuf {
+    let mut path = indent_tests_dir();
+    path.push(name);
+    path
+}
+
+fn indent_tests_config() -> Configuration {
+    let mut config_path = indent_tests_dir();
+    config_path.push("languages.toml");
+    let config = std::fs::read_to_string(config_path).unwrap();
+    toml::from_str(&config).unwrap()
+}
 
-    let mut test_file = test_dir.clone();
-    test_file.push(file_name);
-    let test_file = std::fs::File::open(test_file).unwrap();
+fn standard_treesitter_test(file_name: &str, lang_scope: &str) {
+    let test_path = indent_test_path(file_name);
+    let test_file = std::fs::File::open(test_path).unwrap();
     let doc = ropey::Rope::from_reader(test_file).unwrap();
+    test_treesitter_indent(file_name, doc, lang_scope, Vec::new())
+}
 
-    let mut config_file = test_dir;
-    config_file.push("languages.toml");
-    let config = std::fs::read_to_string(config_file).unwrap();
-    let config = toml::from_str(&config).unwrap();
-    let loader = Loader::new(config);
+/// Test that all the lines in the given file are indented as expected.
+/// ignored_lines is a list of (1-indexed) line ranges that are excluded from this test.
+fn test_treesitter_indent(
+    test_name: &str,
+    doc: Rope,
+    lang_scope: &str,
+    ignored_lines: Vec<std::ops::Range<usize>>,
+) {
+    let loader = Loader::new(indent_tests_config());
 
     // set runtime path so we can find the queries
     let mut runtime = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
@@ -71,21 +194,25 @@ fn test_treesitter_indent(file_name: &str, lang_scope: &str) {
     std::env::set_var("HELIX_RUNTIME", runtime.to_str().unwrap());
 
     let language_config = loader.language_config_for_scope(lang_scope).unwrap();
+    let indent_style = IndentStyle::from_str(&language_config.indent.as_ref().unwrap().unit);
     let highlight_config = language_config.highlight_config(&[]).unwrap();
-    let syntax = Syntax::new(&doc, highlight_config, std::sync::Arc::new(loader));
-    let indent_query = language_config.indent_query().unwrap();
     let text = doc.slice(..);
+    let syntax = Syntax::new(text, highlight_config, std::sync::Arc::new(loader)).unwrap();
+    let indent_query = language_config.indent_query().unwrap();
 
     for i in 0..doc.len_lines() {
         let line = text.line(i);
+        if ignored_lines.iter().any(|range| range.contains(&(i + 1))) {
+            continue;
+        }
         if let Some(pos) = helix_core::find_first_non_whitespace_char(line) {
-            let tab_and_indent_width: usize = 4;
+            let tab_width: usize = 4;
             let suggested_indent = treesitter_indent_for_pos(
                 indent_query,
                 &syntax,
-                &IndentStyle::Spaces(tab_and_indent_width as u8),
-                tab_and_indent_width,
-                tab_and_indent_width,
+                &indent_style,
+                tab_width,
+                indent_style.indent_width(tab_width),
                 text,
                 i,
                 text.line_to_char(i) + pos,
@@ -94,7 +221,8 @@ fn test_treesitter_indent(file_name: &str, lang_scope: &str) {
             .unwrap();
             assert!(
                 line.get_slice(..pos).map_or(false, |s| s == suggested_indent),
-                "Wrong indentation on line {}:\n\"{}\" (original line)\n\"{}\" (suggested indentation)\n",
+                "Wrong indentation for file {:?} on line {}:\n\"{}\" (original line)\n\"{}\" (suggested indentation)\n",
+                test_name,
                 i+1,
                 line.slice(..line.len_chars()-1),
                 suggested_indent,

helix-dap/src/client.rs

@@ -62,12 +62,10 @@ impl Client {
         if command.is_empty() {
             return Result::Err(Error::Other(anyhow!("Command not provided")));
         }
-        if transport == "tcp" && port_arg.is_some() {
-            Self::tcp_process(command, args, port_arg.unwrap(), id).await
-        } else if transport == "stdio" {
-            Self::stdio(command, args, id)
-        } else {
-            Result::Err(Error::Other(anyhow!("Incorrect transport {}", transport)))
+        match (transport, port_arg) {
+            ("tcp", Some(port_arg)) => Self::tcp_process(command, args, port_arg, id).await,
+            ("stdio", _) => Self::stdio(command, args, id),
+            _ => Result::Err(Error::Other(anyhow!("Incorrect transport {}", transport))),
         }
     }
 

helix-dap/src/transport.rs

@@ -230,38 +230,48 @@ impl Transport {
         }
     }
 
-    async fn recv(
+    async fn recv_inner(
         transport: Arc<Self>,
         mut server_stdout: Box<dyn AsyncBufRead + Unpin + Send>,
         client_tx: UnboundedSender<Payload>,
-    ) {
+    ) -> Result<()> {
         let mut recv_buffer = String::new();
         loop {
-            match Self::recv_server_message(&mut server_stdout, &mut recv_buffer).await {
-                Ok(msg) => {
-                    transport
-                        .process_server_message(&client_tx, msg)
-                        .await
-                        .unwrap();
-                }
-                Err(err) => {
-                    error!("err: <- {:?}", err);
-                    break;
+            let msg = Self::recv_server_message(&mut server_stdout, &mut recv_buffer).await?;
+            transport.process_server_message(&client_tx, msg).await?;
         }
     }
+
+    async fn recv(
+        transport: Arc<Self>,
+        server_stdout: Box<dyn AsyncBufRead + Unpin + Send>,
+        client_tx: UnboundedSender<Payload>,
+    ) {
+        if let Err(err) = Self::recv_inner(transport, server_stdout, client_tx).await {
+            error!("err: <- {:?}", err);
         }
     }
 
-    async fn send(
+    async fn send_inner(
         transport: Arc<Self>,
         mut server_stdin: Box<dyn AsyncWrite + Unpin + Send>,
         mut client_rx: UnboundedReceiver<Payload>,
-    ) {
+    ) -> Result<()> {
         while let Some(payload) = client_rx.recv().await {
             transport
                 .send_payload_to_server(&mut server_stdin, payload)
-                .await
-                .unwrap()
+                .await?;
+        }
+        Ok(())
+    }
+
+    async fn send(
+        transport: Arc<Self>,
+        server_stdin: Box<dyn AsyncWrite + Unpin + Send>,
+        client_rx: UnboundedReceiver<Payload>,
+    ) {
+        if let Err(err) = Self::send_inner(transport, server_stdin, client_rx).await {
+            error!("err: <- {:?}", err);
         }
     }
 

helix-event/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "helix-event"
+version = "0.6.0"
+authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
+edition = "2021"
+license = "MPL-2.0"
+categories = ["editor"]
+repository = "https://github.com/helix-editor/helix"
+homepage = "https://helix-editor.com"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tokio = { version = "1", features = ["rt", "rt-multi-thread", "time", "sync", "parking_lot"] }
+parking_lot = { version = "0.12", features = ["send_guard"] }

helix-event/src/lib.rs

@@ -0,0 +1,8 @@
+//! `helix-event` contains systems that allow (often async) communication between
+//! different editor components without strongly coupling them. Currently this
+//! crate only contains some smaller facilities but the intend is to add more
+//! functionality in the future ( like a generic hook system)
+
+pub use redraw::{lock_frame, redraw_requested, request_redraw, start_frame, RenderLockGuard};
+
+mod redraw;

helix-event/src/redraw.rs

@@ -0,0 +1,49 @@
+//! Signals that control when/if the editor redraws
+
+use std::future::Future;
+
+use parking_lot::{RwLock, RwLockReadGuard};
+use tokio::sync::Notify;
+
+/// A `Notify` instance that can be used to (asynchronously) request
+/// the editor the render a new frame.
+static REDRAW_NOTIFY: Notify = Notify::const_new();
+
+/// A `RwLock` that prevents the next frame from being
+/// drawn until an exclusive (write) lock can be acquired.
+/// This allows asynchsonous tasks to acquire `non-exclusive`
+/// locks (read) to prevent the next frame from being drawn
+/// until a certain computation has finished.
+static RENDER_LOCK: RwLock<()> = RwLock::new(());
+
+pub type RenderLockGuard = RwLockReadGuard<'static, ()>;
+
+/// Requests that the editor is redrawn. The redraws are debounced (currently to
+/// 30FPS) so this can be called many times without causing a ton of frames to
+/// be rendered.
+pub fn request_redraw() {
+    REDRAW_NOTIFY.notify_one();
+}
+
+/// Returns a future that will yield once a redraw has been asynchronously
+/// requested using [`request_redraw`].
+pub fn redraw_requested() -> impl Future<Output = ()> {
+    REDRAW_NOTIFY.notified()
+}
+
+/// Wait until all locks acquired with [`lock_frame`] have been released.
+/// This function is called before rendering and is intended to allow the frame
+/// to wait for async computations that should be included in the current frame.
+pub fn start_frame() {
+    drop(RENDER_LOCK.write());
+    // exhaust any leftover redraw notifications
+    let notify = REDRAW_NOTIFY.notified();
+    tokio::pin!(notify);
+    notify.enable();
+}
+
+/// Acquires the render lock which will prevent the next frame from being drawn
+/// until the returned guard is dropped.
+pub fn lock_frame() -> RenderLockGuard {
+    RENDER_LOCK.read()
+}

helix-loader/Cargo.toml

@@ -17,16 +17,19 @@ path = "src/main.rs"
 anyhow = "1"
 serde = { version = "1.0", features = ["derive"] }
 toml = "0.7"
-etcetera = "0.4"
-tree-sitter = "0.20"
-once_cell = "1.17"
+etcetera = "0.8"
+tree-sitter.workspace = true
+once_cell = "1.18"
 log = "0.4"
+which = "4.4"
 
 # TODO: these two should be on !wasm32 only
 
 # cloning/compiling tree-sitter grammars
 cc = { version = "1" }
 threadpool = { version = "1.0" }
+tempfile = "3.8.0"
+dunce = "1.0.4"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-libloading = "0.7"
+libloading = "0.8"

helix-loader/build.rs

@@ -1,4 +1,5 @@
 use std::borrow::Cow;
+use std::path::Path;
 use std::process::Command;
 
 const VERSION: &str = include_str!("../VERSION");
@@ -11,7 +12,7 @@ fn main() {
         .filter(|output| output.status.success())
         .and_then(|x| String::from_utf8(x.stdout).ok());
 
-    let version: Cow<_> = match git_hash {
+    let version: Cow<_> = match &git_hash {
         Some(git_hash) => format!("{} ({})", VERSION, &git_hash[..8]).into(),
         None => VERSION.into(),
     };
@@ -23,4 +24,44 @@ fn main() {
 
     println!("cargo:rerun-if-changed=../VERSION");
     println!("cargo:rustc-env=VERSION_AND_GIT_HASH={}", version);
+
+    if git_hash.is_none() {
+        return;
+    }
+
+    // we need to revparse because the git dir could be anywhere if you are
+    // using detached worktrees but there is no good way to obtain an OsString
+    // from command output so for now we can't accept non-utf8 paths here
+    // probably rare enouch where it doesn't matter tough we could use gitoxide
+    // here but that would be make it a hard dependency and slow compile times
+    let Some(git_dir): Option<String> = Command::new("git")
+        .args(["rev-parse", "--git-dir"])
+        .output()
+        .ok()
+        .filter(|output| output.status.success())
+        .and_then(|x| String::from_utf8(x.stdout).ok())
+    else {
+        return;
+    };
+    // If heads starts pointing at something else (different branch)
+    // we need to return
+    let head = Path::new(&git_dir).join("HEAD");
+    if head.exists() {
+        println!("cargo:rerun-if-changed={}", head.display());
+    }
+    // if the thing head points to (branch) itself changes
+    // we need to return
+    let Some(head_ref): Option<String> = Command::new("git")
+        .args(["symbolic-ref", "HEAD"])
+        .output()
+        .ok()
+        .filter(|output| output.status.success())
+        .and_then(|x| String::from_utf8(x.stdout).ok())
+    else {
+        return;
+    };
+    let head_ref = Path::new(&git_dir).join(head_ref);
+    if head_ref.exists() {
+        println!("cargo:rerun-if-changed={}", head_ref.display());
+    }
 }

helix-loader/src/grammar.rs

@@ -1,4 +1,4 @@
-use anyhow::{anyhow, Context, Result};
+use anyhow::{anyhow, bail, Context, Result};
 use serde::{Deserialize, Serialize};
 use std::fs;
 use std::time::SystemTime;
@@ -8,6 +8,7 @@ use std::{
     process::Command,
     sync::mpsc::channel,
 };
+use tempfile::TempPath;
 use tree_sitter::Language;
 
 #[cfg(unix)]
@@ -84,7 +85,16 @@ pub fn get_language(name: &str) -> Result<Language> {
     Ok(language)
 }
 
+fn ensure_git_is_available() -> Result<()> {
+    match which::which("git") {
+        Ok(_cmd) => Ok(()),
+        Err(err) => Err(anyhow::anyhow!("'git' could not be found ({err})")),
+    }
+}
+
 pub fn fetch_grammars() -> Result<()> {
+    ensure_git_is_available()?;
+
     // We do not need to fetch local grammars.
     let mut grammars = get_grammar_configs()?;
     grammars.retain(|grammar| !matches!(grammar.source, GrammarSource::Local { .. }));
@@ -97,15 +107,12 @@ pub fn fetch_grammars() -> Result<()> {
     let mut git_up_to_date = 0;
     let mut non_git = Vec::new();
 
-    for res in results {
+    for (grammar_id, res) in results {
         match res {
             Ok(FetchStatus::GitUpToDate) => git_up_to_date += 1,
-            Ok(FetchStatus::GitUpdated {
-                grammar_id,
-                revision,
-            }) => git_updated.push((grammar_id, revision)),
-            Ok(FetchStatus::NonGit { grammar_id }) => non_git.push(grammar_id),
-            Err(e) => errors.push(e),
+            Ok(FetchStatus::GitUpdated { revision }) => git_updated.push((grammar_id, revision)),
+            Ok(FetchStatus::NonGit) => non_git.push(grammar_id),
+            Err(e) => errors.push((grammar_id, e)),
         }
     }
 
@@ -137,16 +144,18 @@ pub fn fetch_grammars() -> Result<()> {
 
     if !errors.is_empty() {
         let len = errors.len();
-        println!("{} grammars failed to fetch", len);
-        for (i, error) in errors.into_iter().enumerate() {
-            println!("\tFailure {}/{}: {}", i + 1, len, error);
+        for (i, (grammar, error)) in errors.into_iter().enumerate() {
+            println!("Failure {}/{len}: {grammar} {error}", i + 1);
         }
+        bail!("{len} grammars failed to fetch");
     }
 
     Ok(())
 }
 
 pub fn build_grammars(target: Option<String>) -> Result<()> {
+    ensure_git_is_available()?;
+
     let grammars = get_grammar_configs()?;
     println!("Building {} grammars", grammars.len());
     let results = run_parallel(grammars, move |grammar| {
@@ -157,11 +166,11 @@ pub fn build_grammars(target: Option<String>) -> Result<()> {
     let mut already_built = 0;
     let mut built = Vec::new();
 
-    for res in results {
+    for (grammar_id, res) in results {
         match res {
             Ok(BuildStatus::AlreadyBuilt) => already_built += 1,
-            Ok(BuildStatus::Built { grammar_id }) => built.push(grammar_id),
-            Err(e) => errors.push(e),
+            Ok(BuildStatus::Built) => built.push(grammar_id),
+            Err(e) => errors.push((grammar_id, e)),
         }
     }
 
@@ -178,10 +187,10 @@ pub fn build_grammars(target: Option<String>) -> Result<()> {
 
     if !errors.is_empty() {
         let len = errors.len();
-        println!("{} grammars failed to build", len);
-        for (i, error) in errors.into_iter().enumerate() {
-            println!("\tFailure {}/{}: {}", i, len, error);
+        for (i, (grammar_id, error)) in errors.into_iter().enumerate() {
+            println!("Failure {}/{len}: {grammar_id} {error}", i + 1);
         }
+        bail!("{len} grammars failed to build");
     }
 
     Ok(())
@@ -213,7 +222,7 @@ fn get_grammar_configs() -> Result<Vec<GrammarConfiguration>> {
     Ok(grammars)
 }
 
-fn run_parallel<F, Res>(grammars: Vec<GrammarConfiguration>, job: F) -> Vec<Result<Res>>
+fn run_parallel<F, Res>(grammars: Vec<GrammarConfiguration>, job: F) -> Vec<(String, Result<Res>)>
 where
     F: Fn(GrammarConfiguration) -> Result<Res> + Send + 'static + Clone,
     Res: Send + 'static,
@@ -228,7 +237,7 @@ where
         pool.execute(move || {
             // Ignore any SendErrors, if any job in another thread has encountered an
             // error the Receiver will be closed causing this send to fail.
-            let _ = tx.send(job(grammar));
+            let _ = tx.send((grammar.grammar_id.clone(), job(grammar)));
         });
     }
 
@@ -239,13 +248,8 @@ where
 
 enum FetchStatus {
     GitUpToDate,
-    GitUpdated {
-        grammar_id: String,
-        revision: String,
-    },
-    NonGit {
-        grammar_id: String,
-    },
+    GitUpdated { revision: String },
+    NonGit,
 }
 
 fn fetch_grammar(grammar: GrammarConfiguration) -> Result<FetchStatus> {
@@ -286,17 +290,12 @@ fn fetch_grammar(grammar: GrammarConfiguration) -> Result<FetchStatus> {
             )?;
             git(&grammar_dir, ["checkout", &revision])?;
 
-            Ok(FetchStatus::GitUpdated {
-                grammar_id: grammar.grammar_id,
-                revision,
-            })
+            Ok(FetchStatus::GitUpdated { revision })
         } else {
             Ok(FetchStatus::GitUpToDate)
         }
     } else {
-        Ok(FetchStatus::NonGit {
-            grammar_id: grammar.grammar_id,
-        })
+        Ok(FetchStatus::NonGit)
     }
 }
 
@@ -346,7 +345,7 @@ where
 
 enum BuildStatus {
     AlreadyBuilt,
-    Built { grammar_id: String },
+    Built,
 }
 
 fn build_grammar(grammar: GrammarConfiguration, target: Option<&str>) -> Result<BuildStatus> {
@@ -413,6 +412,18 @@ fn build_tree_sitter_library(
     let mut library_path = parser_lib_path.join(&grammar.grammar_id);
     library_path.set_extension(DYLIB_EXTENSION);
 
+    // if we are running inside a buildscript emit cargo metadata
+    // to detect if we are running from a buildscript check some env variables
+    // that cargo only sets for build scripts
+    if std::env::var("OUT_DIR").is_ok() && std::env::var("CARGO").is_ok() {
+        if let Some(scanner_path) = scanner_path.as_ref().and_then(|path| path.to_str()) {
+            println!("cargo:rerun-if-changed={scanner_path}");
+        }
+        if let Some(parser_path) = parser_path.to_str() {
+            println!("cargo:rerun-if-changed={parser_path}");
+        }
+    }
+
     let recompile = needs_recompile(&library_path, &parser_path, &scanner_path)
         .context("Failed to compare source and binary timestamps")?;
 
@@ -433,16 +444,53 @@ fn build_tree_sitter_library(
     for (key, value) in compiler.env() {
         command.env(key, value);
     }
+
     command.args(compiler.args());
+    // used to delay dropping the temporary object file until after the compilation is complete
+    let _path_guard;
 
-    if cfg!(all(windows, target_env = "msvc")) {
+    if compiler.is_like_msvc() {
         command
             .args(["/nologo", "/LD", "/I"])
             .arg(header_path)
             .arg("/Od")
-            .arg("/utf-8");
+            .arg("/utf-8")
+            .arg("/std:c11");
         if let Some(scanner_path) = scanner_path.as_ref() {
+            if scanner_path.extension() == Some("c".as_ref()) {
                 command.arg(scanner_path);
+            } else {
+                let mut cpp_command = Command::new(compiler.path());
+                cpp_command.current_dir(src_path);
+                for (key, value) in compiler.env() {
+                    cpp_command.env(key, value);
+                }
+                cpp_command.args(compiler.args());
+                let object_file =
+                    library_path.with_file_name(format!("{}_scanner.obj", &grammar.grammar_id));
+                cpp_command
+                    .args(["/nologo", "/LD", "/I"])
+                    .arg(header_path)
+                    .arg("/Od")
+                    .arg("/utf-8")
+                    .arg("/std:c++14")
+                    .arg(format!("/Fo{}", object_file.display()))
+                    .arg("/c")
+                    .arg(scanner_path);
+                let output = cpp_command
+                    .output()
+                    .context("Failed to execute C++ compiler")?;
+
+                if !output.status.success() {
+                    return Err(anyhow!(
+                        "Parser compilation failed.\nStdout: {}\nStderr: {}",
+                        String::from_utf8_lossy(&output.stdout),
+                        String::from_utf8_lossy(&output.stderr)
+                    ));
+                }
+                command.arg(&object_file);
+                _path_guard = TempPath::from_path(object_file);
+            }
         }
 
         command
@@ -454,20 +502,49 @@ fn build_tree_sitter_library(
             .arg("-shared")
             .arg("-fPIC")
             .arg("-fno-exceptions")
-            .arg("-g")
             .arg("-I")
             .arg(header_path)
             .arg("-o")
-            .arg(&library_path)
-            .arg("-O3");
+            .arg(&library_path);
+
         if let Some(scanner_path) = scanner_path.as_ref() {
             if scanner_path.extension() == Some("c".as_ref()) {
-                command.arg("-xc").arg("-std=c99").arg(scanner_path);
+                command.arg("-xc").arg("-std=c11").arg(scanner_path);
             } else {
-                command.arg(scanner_path);
+                let mut cpp_command = Command::new(compiler.path());
+                cpp_command.current_dir(src_path);
+                for (key, value) in compiler.env() {
+                    cpp_command.env(key, value);
+                }
+                cpp_command.args(compiler.args());
+                let object_file =
+                    library_path.with_file_name(format!("{}_scanner.o", &grammar.grammar_id));
+                cpp_command
+                    .arg("-fPIC")
+                    .arg("-fno-exceptions")
+                    .arg("-I")
+                    .arg(header_path)
+                    .arg("-o")
+                    .arg(&object_file)
+                    .arg("-std=c++14")
+                    .arg("-c")
+                    .arg(scanner_path);
+                let output = cpp_command
+                    .output()
+                    .context("Failed to execute C++ compiler")?;
+                if !output.status.success() {
+                    return Err(anyhow!(
+                        "Parser compilation failed.\nStdout: {}\nStderr: {}",
+                        String::from_utf8_lossy(&output.stdout),
+                        String::from_utf8_lossy(&output.stderr)
+                    ));
+                }
+
+                command.arg(&object_file);
+                _path_guard = TempPath::from_path(object_file);
             }
         }
-        command.arg("-xc").arg(parser_path);
+        command.arg("-xc").arg("-std=c11").arg(parser_path);
         if cfg!(all(
             unix,
             not(any(target_os = "macos", target_os = "illumos"))
@@ -487,9 +564,7 @@ fn build_tree_sitter_library(
         ));
     }
 
-    Ok(BuildStatus::Built {
-        grammar_id: grammar.grammar_id,
-    })
+    Ok(BuildStatus::Built)
 }
 
 fn needs_recompile(

helix-loader/src/lib.rs

@@ -1,37 +1,58 @@
 pub mod config;
 pub mod grammar;
 
-use anyhow::{anyhow, Result};
 use etcetera::base_strategy::{choose_base_strategy, BaseStrategy};
-use once_cell::sync::Lazy;
-use std::{
-    collections::{HashMap, HashSet},
-    path::{Path, PathBuf},
-};
-use toml::Value;
+use std::path::{Path, PathBuf};
+use std::sync::RwLock;
 
 pub const VERSION_AND_GIT_HASH: &str = env!("VERSION_AND_GIT_HASH");
 
+static CWD: RwLock<Option<PathBuf>> = RwLock::new(None);
+
 static RUNTIME_DIRS: once_cell::sync::Lazy<Vec<PathBuf>> =
     once_cell::sync::Lazy::new(prioritize_runtime_dirs);
 
 static CONFIG_FILE: once_cell::sync::OnceCell<PathBuf> = once_cell::sync::OnceCell::new();
 
-pub fn initialize_config_file(specified_file: Option<PathBuf>) {
-    let config_file = specified_file.unwrap_or_else(|| {
-        let config_dir = config_dir();
+static LOG_FILE: once_cell::sync::OnceCell<PathBuf> = once_cell::sync::OnceCell::new();
+
+// Get the current working directory.
+// This information is managed internally as the call to std::env::current_dir
+// might fail if the cwd has been deleted.
+pub fn current_working_dir() -> PathBuf {
+    if let Some(path) = &*CWD.read().unwrap() {
+        return path.clone();
+    }
+
+    let path = std::env::current_dir()
+        .and_then(dunce::canonicalize)
+        .expect("Couldn't determine current working directory");
+    let mut cwd = CWD.write().unwrap();
+    *cwd = Some(path.clone());
 
-        if !config_dir.exists() {
-            std::fs::create_dir_all(&config_dir).ok();
+    path
 }
 
-        config_dir.join("config.toml")
-    });
+pub fn set_current_working_dir(path: PathBuf) -> std::io::Result<()> {
+    let path = dunce::canonicalize(path)?;
+    std::env::set_current_dir(path.clone())?;
+    let mut cwd = CWD.write().unwrap();
+    *cwd = Some(path);
+    Ok(())
+}
 
-    // We should only initialize this value once.
+pub fn initialize_config_file(specified_file: Option<PathBuf>) {
+    let config_file = specified_file.unwrap_or_else(default_config_file);
+    ensure_parent_dir(&config_file);
     CONFIG_FILE.set(config_file).ok();
 }
 
+pub fn initialize_log_file(specified_file: Option<PathBuf>) {
+    let log_file = specified_file.unwrap_or_else(default_log_file);
+    ensure_parent_dir(&log_file);
+    LOG_FILE.set(log_file).ok();
+}
+
 /// A list of runtime directories from highest to lowest priority
 ///
 /// The priority is:
@@ -128,10 +149,11 @@ pub fn cache_dir() -> PathBuf {
 }
 
 pub fn config_file() -> PathBuf {
-    CONFIG_FILE
-        .get()
-        .map(|path| path.to_path_buf())
-        .unwrap_or_else(|| config_dir().join("config.toml"))
+    CONFIG_FILE.get().map(|path| path.to_path_buf()).unwrap()
+}
+
+pub fn log_file() -> PathBuf {
+    LOG_FILE.get().map(|path| path.to_path_buf()).unwrap()
 }
 
 pub fn workspace_config_file() -> PathBuf {
@@ -142,7 +164,7 @@ pub fn lang_config_file() -> PathBuf {
     config_dir().join("languages.toml")
 }
 
-pub fn log_file() -> PathBuf {
+pub fn default_log_file() -> PathBuf {
     cache_dir().join("helix.log")
 }
 
@@ -160,6 +182,8 @@ pub fn log_file() -> PathBuf {
 /// where one usually wants to override or add to the array instead of
 /// replacing it altogether.
 pub fn merge_toml_values(left: toml::Value, right: toml::Value, merge_depth: usize) -> toml::Value {
+    use toml::Value;
+
     fn get_name(v: &Value) -> Option<&str> {
         v.get("name").and_then(Value::as_str)
     }
@@ -213,122 +237,55 @@ pub fn merge_toml_values(left: toml::Value, right: toml::Value, merge_depth: usi
     }
 }
 
-/// Recursively load a TOML document, merging with any inherited parent files.
-///
-/// The paths that have been visited in the inheritance hierarchy are tracked
-/// to detect and avoid cycling.
-///
-/// It is possible for one file to inherit from another file with the same name
-/// so long as the second file is in a search directory with lower priority.
-/// However, it is not recommended that users do this as it will make tracing
-/// errors more difficult.
-pub fn load_inheritable_toml(
-    name: &str,
-    search_directories: &[PathBuf],
-    visited_paths: &mut HashSet<PathBuf>,
-    default_toml_data: &HashMap<&str, &Lazy<Value>>,
-    merge_toml_docs: fn(Value, Value) -> Value,
-) -> Result<Value> {
-    let path = get_toml_path(name, search_directories, visited_paths)?;
-
-    let toml_doc = load_toml(&path)?;
-
-    let inherits = toml_doc.get("inherits");
-
-    let toml_doc = if let Some(parent_toml_name) = inherits {
-        let parent_toml_name = parent_toml_name.as_str().ok_or_else(|| {
-            anyhow!(
-                "{:?}: expected 'inherits' to be a string: {}",
-                path,
-                parent_toml_name
-            )
-        })?;
-
-        let parent_toml_doc = match default_toml_data.get(parent_toml_name) {
-            Some(p) => (**p).clone(),
-            None => load_inheritable_toml(
-                parent_toml_name,
-                search_directories,
-                visited_paths,
-                default_toml_data,
-                merge_toml_docs,
-            )?,
-        };
-
-        merge_toml_docs(parent_toml_doc, toml_doc)
-    } else {
-        toml_doc
-    };
-
-    Ok(toml_doc)
-}
-
-/// Returns the path to the TOML document with the given name
+/// Finds the current workspace folder.
+/// Used as a ceiling dir for LSP root resolution, the filepicker and potentially as a future filewatching root
 ///
-/// Ignores paths already visited and follows directory priority order.
-fn get_toml_path(
-    name: &str,
-    search_directories: &[PathBuf],
-    visited_paths: &mut HashSet<PathBuf>,
-) -> Result<PathBuf> {
-    let filename = format!("{}.toml", name);
-
-    let mut cycle_found = false; // track if there was a path, but it was in a cycle
-    search_directories
-        .iter()
-        .find_map(|dir| {
-            let path = dir.join(&filename);
-            if !path.exists() {
-                None
-            } else if visited_paths.contains(&path) {
-                // Avoiding cycle, continuing to look in lower priority directories
-                cycle_found = true;
-                None
-            } else {
-                visited_paths.insert(path.clone());
-                Some(path)
-            }
-        })
-        .ok_or_else(|| {
-            if cycle_found {
-                anyhow!("Toml: cycle found in inheriting: {}", name)
-            } else {
-                anyhow!("Toml: file not found for: {}", name)
+/// This function starts searching the FS upward from the CWD
+/// and returns the first directory that contains either `.git` or `.helix`.
+/// If no workspace was found returns (CWD, true).
+/// Otherwise (workspace, false) is returned
+pub fn find_workspace() -> (PathBuf, bool) {
+    let current_dir = current_working_dir();
+    for ancestor in current_dir.ancestors() {
+        if ancestor.join(".git").exists() || ancestor.join(".helix").exists() {
+            return (ancestor.to_owned(), false);
         }
-        })
     }
 
-// Loads the TOML data as `toml::Value`
-fn load_toml(path: &Path) -> Result<Value> {
-    let data = std::fs::read_to_string(path)?;
-    let value = toml::from_str(&data)?;
+    (current_dir, true)
+}
 
-    Ok(value)
+fn default_config_file() -> PathBuf {
+    config_dir().join("config.toml")
 }
 
-/// Returns the names of the TOML documents within a directory
-pub fn read_toml_names(path: &Path) -> Vec<String> {
-    std::fs::read_dir(path)
-        .map(|entries| {
-            entries
-                .filter_map(|entry| {
-                    let entry = entry.ok()?;
-                    let path = entry.path();
-                    (path.extension()? == "toml")
-                        .then(|| path.file_stem().unwrap().to_string_lossy().into_owned())
-                })
-                .collect()
-        })
-        .unwrap_or_default()
+fn ensure_parent_dir(path: &Path) {
+    if let Some(parent) = path.parent() {
+        if !parent.exists() {
+            std::fs::create_dir_all(parent).ok();
+        }
+    }
 }
 
 #[cfg(test)]
 mod merge_toml_tests {
     use std::str;
 
-    use super::merge_toml_values;
+    use super::{current_working_dir, merge_toml_values, set_current_working_dir};
     use toml::Value;
 
+    #[test]
+    fn current_dir_is_set() {
+        let new_path = dunce::canonicalize(std::env::temp_dir()).unwrap();
+        let cwd = current_working_dir();
+        assert_ne!(cwd, new_path);
+
+        set_current_working_dir(new_path.clone()).expect("Couldn't set new path");
+
+        let cwd = current_working_dir();
+        assert_eq!(cwd, new_path);
+    }
+
     #[test]
     fn language_toml_map_merges() {
         const USER: &str = r#"
@@ -394,21 +351,3 @@ mod merge_toml_tests {
         )
     }
 }
-
-/// Finds the current workspace folder.
-/// Used as a ceiling dir for LSP root resolution, the filepicker and potentially as a future filewatching root
-///
-/// This function starts searching the FS upward from the CWD
-/// and returns the first directory that contains either `.git` or `.helix`.
-/// If no workspace was found returns (CWD, true).
-/// Otherwise (workspace, false) is returned
-pub fn find_workspace() -> (PathBuf, bool) {
-    let current_dir = std::env::current_dir().expect("unable to determine current directory");
-    for ancestor in current_dir.ancestors() {
-        if ancestor.join(".git").exists() || ancestor.join(".helix").exists() {
-            return (ancestor.to_owned(), false);
-        }
-    }
-
-    (current_dir, true)
-}

helix-lsp/Cargo.toml

@@ -19,12 +19,13 @@ helix-parsec = { version = "0.6", path = "../helix-parsec" }
 anyhow = "1.0"
 futures-executor = "0.3"
 futures-util = { version = "0.3", features = ["std", "async-await"], default-features = false }
+globset = "0.4.13"
 log = "0.4"
 lsp-types = { version = "0.94" }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 thiserror = "1.0"
-tokio = { version = "1.27", features = ["rt", "rt-multi-thread", "io-util", "io-std", "time", "process", "macros", "fs", "parking_lot", "sync"] }
-tokio-stream = "0.1.12"
+tokio = { version = "1.32", features = ["rt", "rt-multi-thread", "io-util", "io-std", "time", "process", "macros", "fs", "parking_lot", "sync"] }
+tokio-stream = "0.1.14"
 which = "4.4"
 parking_lot = "0.12.1"

helix-lsp/src/client.rs

@@ -4,11 +4,12 @@ use crate::{
     Call, Error, OffsetEncoding, Result,
 };
 
-use helix_core::{find_workspace, path, ChangeSet, Rope};
+use helix_core::{find_workspace, path, syntax::LanguageServerFeature, ChangeSet, Rope};
 use helix_loader::{self, VERSION_AND_GIT_HASH};
 use lsp::{
-    notification::DidChangeWorkspaceFolders, DidChangeWorkspaceFoldersParams, OneOf,
-    PositionEncodingKind, WorkspaceFolder, WorkspaceFoldersChangeEvent,
+    notification::DidChangeWorkspaceFolders, CodeActionCapabilityResolveSupport,
+    DidChangeWorkspaceFoldersParams, OneOf, PositionEncodingKind, WorkspaceFolder,
+    WorkspaceFoldersChangeEvent,
 };
 use lsp_types as lsp;
 use parking_lot::Mutex;
@@ -44,6 +45,7 @@ fn workspace_for_uri(uri: lsp::Url) -> WorkspaceFolder {
 #[derive(Debug)]
 pub struct Client {
     id: usize,
+    name: String,
     _process: Child,
     server_tx: UnboundedSender<Payload>,
     request_counter: AtomicU64,
@@ -166,8 +168,7 @@ impl Client {
         tokio::spawn(self.did_change_workspace(vec![workspace_for_uri(root_uri)], Vec::new()));
     }
 
-    #[allow(clippy::type_complexity)]
-    #[allow(clippy::too_many_arguments)]
+    #[allow(clippy::type_complexity, clippy::too_many_arguments)]
     pub fn start(
         cmd: &str,
         args: &[String],
@@ -176,6 +177,7 @@ impl Client {
         root_markers: &[String],
         manual_roots: &[PathBuf],
         id: usize,
+        name: String,
         req_timeout: u64,
         doc_path: Option<&std::path::PathBuf>,
     ) -> Result<(Self, UnboundedReceiver<(usize, Call)>, Arc<Notify>)> {
@@ -200,7 +202,7 @@ impl Client {
         let stderr = BufReader::new(process.stderr.take().expect("Failed to open stderr"));
 
         let (server_rx, server_tx, initialize_notify) =
-            Transport::start(reader, writer, stderr, id);
+            Transport::start(reader, writer, stderr, id, name.clone());
         let (workspace, workspace_is_cwd) = find_workspace();
         let workspace = path::get_normalized_path(&workspace);
         let root = find_lsp_workspace(
@@ -225,6 +227,7 @@ impl Client {
 
         let client = Self {
             id,
+            name,
             _process: process,
             server_tx,
             request_counter: AtomicU64::new(0),
@@ -240,6 +243,10 @@ impl Client {
         Ok((client, server_rx, initialize_notify))
     }
 
+    pub fn name(&self) -> &str {
+        &self.name
+    }
+
     pub fn id(&self) -> usize {
         self.id
     }
@@ -270,6 +277,87 @@ impl Client {
             .expect("language server not yet initialized!")
     }
 
+    /// Client has to be initialized otherwise this function panics
+    #[inline]
+    pub fn supports_feature(&self, feature: LanguageServerFeature) -> bool {
+        let capabilities = self.capabilities();
+
+        use lsp::*;
+        match feature {
+            LanguageServerFeature::Format => matches!(
+                capabilities.document_formatting_provider,
+                Some(OneOf::Left(true) | OneOf::Right(_))
+            ),
+            LanguageServerFeature::GotoDeclaration => matches!(
+                capabilities.declaration_provider,
+                Some(
+                    DeclarationCapability::Simple(true)
+                        | DeclarationCapability::RegistrationOptions(_)
+                        | DeclarationCapability::Options(_),
+                )
+            ),
+            LanguageServerFeature::GotoDefinition => matches!(
+                capabilities.definition_provider,
+                Some(OneOf::Left(true) | OneOf::Right(_))
+            ),
+            LanguageServerFeature::GotoTypeDefinition => matches!(
+                capabilities.type_definition_provider,
+                Some(
+                    TypeDefinitionProviderCapability::Simple(true)
+                        | TypeDefinitionProviderCapability::Options(_),
+                )
+            ),
+            LanguageServerFeature::GotoReference => matches!(
+                capabilities.references_provider,
+                Some(OneOf::Left(true) | OneOf::Right(_))
+            ),
+            LanguageServerFeature::GotoImplementation => matches!(
+                capabilities.implementation_provider,
+                Some(
+                    ImplementationProviderCapability::Simple(true)
+                        | ImplementationProviderCapability::Options(_),
+                )
+            ),
+            LanguageServerFeature::SignatureHelp => capabilities.signature_help_provider.is_some(),
+            LanguageServerFeature::Hover => matches!(
+                capabilities.hover_provider,
+                Some(HoverProviderCapability::Simple(true) | HoverProviderCapability::Options(_),)
+            ),
+            LanguageServerFeature::DocumentHighlight => matches!(
+                capabilities.document_highlight_provider,
+                Some(OneOf::Left(true) | OneOf::Right(_))
+            ),
+            LanguageServerFeature::Completion => capabilities.completion_provider.is_some(),
+            LanguageServerFeature::CodeAction => matches!(
+                capabilities.code_action_provider,
+                Some(
+                    CodeActionProviderCapability::Simple(true)
+                        | CodeActionProviderCapability::Options(_),
+                )
+            ),
+            LanguageServerFeature::WorkspaceCommand => {
+                capabilities.execute_command_provider.is_some()
+            }
+            LanguageServerFeature::DocumentSymbols => matches!(
+                capabilities.document_symbol_provider,
+                Some(OneOf::Left(true) | OneOf::Right(_))
+            ),
+            LanguageServerFeature::WorkspaceSymbols => matches!(
+                capabilities.workspace_symbol_provider,
+                Some(OneOf::Left(true) | OneOf::Right(_))
+            ),
+            LanguageServerFeature::Diagnostics => true, // there's no extra server capability
+            LanguageServerFeature::RenameSymbol => matches!(
+                capabilities.rename_provider,
+                Some(OneOf::Left(true)) | Some(OneOf::Right(_))
+            ),
+            LanguageServerFeature::InlayHints => matches!(
+                capabilities.inlay_hint_provider,
+                Some(OneOf::Left(true) | OneOf::Right(InlayHintServerCapabilities::Options(_)))
+            ),
+        }
+    }
+
     pub fn offset_encoding(&self) -> OffsetEncoding {
         self.capabilities()
             .position_encoding
@@ -456,6 +544,10 @@ impl Client {
                         normalizes_line_endings: Some(false),
                         change_annotation_support: None,
                     }),
+                    did_change_watched_files: Some(lsp::DidChangeWatchedFilesClientCapabilities {
+                        dynamic_registration: Some(true),
+                        relative_pattern_support: Some(false),
+                    }),
                     ..Default::default()
                 }),
                 text_document: Some(lsp::TextDocumentClientCapabilities {
@@ -522,6 +614,12 @@ impl Client {
                                 .collect(),
                             },
                         }),
+                        is_preferred_support: Some(true),
+                        disabled_support: Some(true),
+                        data_support: Some(true),
+                        resolve_support: Some(CodeActionCapabilityResolveSupport {
+                            properties: vec!["edit".to_owned(), "command".to_owned()],
+                        }),
                         ..Default::default()
                     }),
                     publish_diagnostics: Some(lsp::PublishDiagnosticsClientCapabilities {
@@ -645,7 +743,11 @@ impl Client {
         // Calculation is therefore a bunch trickier.
 
         use helix_core::RopeSlice;
-        fn traverse(pos: lsp::Position, text: RopeSlice) -> lsp::Position {
+        fn traverse(
+            pos: lsp::Position,
+            text: RopeSlice,
+            offset_encoding: OffsetEncoding,
+        ) -> lsp::Position {
             let lsp::Position {
                 mut line,
                 mut character,
@@ -662,7 +764,11 @@ impl Client {
                     line += 1;
                     character = 0;
                 } else {
-                    character += ch.len_utf16() as u32;
+                    character += match offset_encoding {
+                        OffsetEncoding::Utf8 => ch.len_utf8() as u32,
+                        OffsetEncoding::Utf16 => ch.len_utf16() as u32,
+                        OffsetEncoding::Utf32 => 1,
+                    };
                 }
             }
             lsp::Position { line, character }
@@ -683,7 +789,7 @@ impl Client {
                 }
                 Delete(_) => {
                     let start = pos_to_lsp_pos(new_text, new_pos, offset_encoding);
-                    let end = traverse(start, old_text.slice(old_pos..old_end));
+                    let end = traverse(start, old_text.slice(old_pos..old_end), offset_encoding);
 
                     // deletion
                     changes.push(lsp::TextDocumentContentChangeEvent {
@@ -700,7 +806,8 @@ impl Client {
                     // a subsequent delete means a replace, consume it
                     let end = if let Some(Delete(len)) = iter.peek() {
                         old_end = old_pos + len;
-                        let end = traverse(start, old_text.slice(old_pos..old_end));
+                        let end =
+                            traverse(start, old_text.slice(old_pos..old_end), offset_encoding);
 
                         iter.next();
 
@@ -858,6 +965,24 @@ impl Client {
         Some(self.call::<lsp::request::ResolveCompletionItem>(completion_item))
     }
 
+    pub fn resolve_code_action(
+        &self,
+        code_action: lsp::CodeAction,
+    ) -> Option<impl Future<Output = Result<Value>>> {
+        let capabilities = self.capabilities.get().unwrap();
+
+        // Return early if the server does not support resolving code action.
+        match capabilities.completion_provider {
+            Some(lsp::CompletionOptions {
+                resolve_provider: Some(true),
+                ..
+            }) => (),
+            _ => return None,
+        }
+
+        Some(self.call::<lsp::request::CodeActionResolveRequest>(code_action))
+    }
+
     pub fn text_document_signature_help(
         &self,
         text_document: lsp::TextDocumentIdentifier,
@@ -1167,6 +1292,7 @@ impl Client {
         &self,
         text_document: lsp::TextDocumentIdentifier,
         position: lsp::Position,
+        include_declaration: bool,
         work_done_token: Option<lsp::ProgressToken>,
     ) -> Option<impl Future<Output = Result<Value>>> {
         let capabilities = self.capabilities.get().unwrap();
@@ -1183,7 +1309,7 @@ impl Client {
                 position,
             },
             context: lsp::ReferenceContext {
-                include_declaration: true,
+                include_declaration,
             },
             work_done_progress_params: lsp::WorkDoneProgressParams { work_done_token },
             partial_result_params: lsp::PartialResultParams {
@@ -1285,21 +1411,13 @@ impl Client {
         Some(self.call::<lsp::request::CodeActionRequest>(params))
     }
 
-    pub fn supports_rename(&self) -> bool {
-        let capabilities = self.capabilities.get().unwrap();
-        matches!(
-            capabilities.rename_provider,
-            Some(lsp::OneOf::Left(true) | lsp::OneOf::Right(_))
-        )
-    }
-
     pub fn rename_symbol(
         &self,
         text_document: lsp::TextDocumentIdentifier,
         position: lsp::Position,
         new_name: String,
     ) -> Option<impl Future<Output = Result<lsp::WorkspaceEdit>>> {
-        if !self.supports_rename() {
+        if !self.supports_feature(LanguageServerFeature::RenameSymbol) {
             return None;
         }
 
@@ -1339,4 +1457,13 @@ impl Client {
 
         Some(self.call::<lsp::request::ExecuteCommand>(params))
     }
+
+    pub fn did_change_watched_files(
+        &self,
+        changes: Vec<lsp::FileEvent>,
+    ) -> impl Future<Output = std::result::Result<(), Error>> {
+        self.notify::<lsp::notification::DidChangeWatchedFiles>(lsp::DidChangeWatchedFilesParams {
+            changes,
+        })
+    }
 }

helix-lsp/src/file_event.rs

@@ -0,0 +1,193 @@
+use std::{collections::HashMap, path::PathBuf, sync::Weak};
+
+use globset::{GlobBuilder, GlobSetBuilder};
+use tokio::sync::mpsc;
+
+use crate::{lsp, Client};
+
+enum Event {
+    FileChanged {
+        path: PathBuf,
+    },
+    Register {
+        client_id: usize,
+        client: Weak<Client>,
+        registration_id: String,
+        options: lsp::DidChangeWatchedFilesRegistrationOptions,
+    },
+    Unregister {
+        client_id: usize,
+        registration_id: String,
+    },
+    RemoveClient {
+        client_id: usize,
+    },
+}
+
+#[derive(Default)]
+struct ClientState {
+    client: Weak<Client>,
+    registered: HashMap<String, globset::GlobSet>,
+}
+
+/// The Handler uses a dedicated tokio task to respond to file change events by
+/// forwarding changes to LSPs that have registered for notifications with a
+/// matching glob.
+///
+/// When an LSP registers for the DidChangeWatchedFiles notification, the
+/// Handler is notified by sending the registration details in addition to a
+/// weak reference to the LSP client. This is done so that the Handler can have
+/// access to the client without preventing the client from being dropped if it
+/// is closed and the Handler isn't properly notified.
+#[derive(Clone, Debug)]
+pub struct Handler {
+    tx: mpsc::UnboundedSender<Event>,
+}
+
+impl Default for Handler {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Handler {
+    pub fn new() -> Self {
+        let (tx, rx) = mpsc::unbounded_channel();
+        tokio::spawn(Self::run(rx));
+        Self { tx }
+    }
+
+    pub fn register(
+        &self,
+        client_id: usize,
+        client: Weak<Client>,
+        registration_id: String,
+        options: lsp::DidChangeWatchedFilesRegistrationOptions,
+    ) {
+        let _ = self.tx.send(Event::Register {
+            client_id,
+            client,
+            registration_id,
+            options,
+        });
+    }
+
+    pub fn unregister(&self, client_id: usize, registration_id: String) {
+        let _ = self.tx.send(Event::Unregister {
+            client_id,
+            registration_id,
+        });
+    }
+
+    pub fn file_changed(&self, path: PathBuf) {
+        let _ = self.tx.send(Event::FileChanged { path });
+    }
+
+    pub fn remove_client(&self, client_id: usize) {
+        let _ = self.tx.send(Event::RemoveClient { client_id });
+    }
+
+    async fn run(mut rx: mpsc::UnboundedReceiver<Event>) {
+        let mut state: HashMap<usize, ClientState> = HashMap::new();
+        while let Some(event) = rx.recv().await {
+            match event {
+                Event::FileChanged { path } => {
+                    log::debug!("Received file event for {:?}", &path);
+
+                    state.retain(|id, client_state| {
+                        if !client_state
+                            .registered
+                            .values()
+                            .any(|glob| glob.is_match(&path))
+                        {
+                            return true;
+                        }
+                        let Some(client) = client_state.client.upgrade() else {
+                            log::warn!("LSP client was dropped: {id}");
+                            return false;
+                        };
+                        let Ok(uri) = lsp::Url::from_file_path(&path) else {
+                            return true;
+                        };
+                        log::debug!(
+                            "Sending didChangeWatchedFiles notification to client '{}'",
+                            client.name()
+                        );
+                        if let Err(err) = crate::block_on(client
+                            .did_change_watched_files(vec![lsp::FileEvent {
+                                uri,
+                                // We currently always send the CHANGED state
+                                // since we don't actually have more context at
+                                // the moment.
+                                typ: lsp::FileChangeType::CHANGED,
+                            }]))
+                        {
+                            log::warn!("Failed to send didChangeWatchedFiles notification to client: {err}");
+                        }
+                        true
+                    });
+                }
+                Event::Register {
+                    client_id,
+                    client,
+                    registration_id,
+                    options: ops,
+                } => {
+                    log::debug!(
+                        "Registering didChangeWatchedFiles for client '{}' with id '{}'",
+                        client_id,
+                        registration_id
+                    );
+
+                    let entry = state.entry(client_id).or_insert_with(ClientState::default);
+                    entry.client = client;
+
+                    let mut builder = GlobSetBuilder::new();
+                    for watcher in ops.watchers {
+                        if let lsp::GlobPattern::String(pattern) = watcher.glob_pattern {
+                            if let Ok(glob) = GlobBuilder::new(&pattern).build() {
+                                builder.add(glob);
+                            }
+                        }
+                    }
+                    match builder.build() {
+                        Ok(globset) => {
+                            entry.registered.insert(registration_id, globset);
+                        }
+                        Err(err) => {
+                            // Remove any old state for that registration id and
+                            // remove the entire client if it's now empty.
+                            entry.registered.remove(&registration_id);
+                            if entry.registered.is_empty() {
+                                state.remove(&client_id);
+                            }
+                            log::warn!(
+                                "Unable to build globset for LSP didChangeWatchedFiles {err}"
+                            )
+                        }
+                    }
+                }
+                Event::Unregister {
+                    client_id,
+                    registration_id,
+                } => {
+                    log::debug!(
+                        "Unregistering didChangeWatchedFiles with id '{}' for client '{}'",
+                        registration_id,
+                        client_id
+                    );
+                    if let Some(client_state) = state.get_mut(&client_id) {
+                        client_state.registered.remove(&registration_id);
+                        if client_state.registered.is_empty() {
+                            state.remove(&client_id);
+                        }
+                    }
+                }
+                Event::RemoveClient { client_id } => {
+                    log::debug!("Removing LSP client: {client_id}");
+                    state.remove(&client_id);
+                }
+            }
+        }
+    }
+}

helix-lsp/src/lib.rs

@@ -1,4 +1,5 @@
 mod client;
+pub mod file_event;
 pub mod jsonrpc;
 pub mod snippet;
 mod transport;
@@ -12,24 +13,21 @@ pub use lsp_types as lsp;
 use futures_util::stream::select_all::SelectAll;
 use helix_core::{
     path,
-    syntax::{LanguageConfiguration, LanguageServerConfiguration},
+    syntax::{LanguageConfiguration, LanguageServerConfiguration, LanguageServerFeatures},
 };
 use tokio::sync::mpsc::UnboundedReceiver;
 
 use std::{
-    collections::{hash_map::Entry, HashMap},
+    collections::HashMap,
     path::{Path, PathBuf},
-    sync::{
-        atomic::{AtomicUsize, Ordering},
-        Arc,
-    },
+    sync::Arc,
 };
 
 use thiserror::Error;
 use tokio_stream::wrappers::UnboundedReceiverStream;
 
 pub type Result<T> = core::result::Result<T, Error>;
-type LanguageId = String;
+pub type LanguageServerName = String;
 
 #[derive(Error, Debug)]
 pub enum Error {
@@ -49,7 +47,7 @@ pub enum Error {
     Other(#[from] anyhow::Error),
 }
 
-#[derive(Clone, Copy, Debug, Default)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
 pub enum OffsetEncoding {
     /// UTF-8 code units aka bytes
     Utf8,
@@ -380,7 +378,7 @@ pub mod util {
         .expect("transaction must be valid for primary selection");
         let removed_text = text.slice(removed_start..removed_end);
 
-        let (transaction, selection) = Transaction::change_by_selection_ignore_overlapping(
+        let (transaction, mut selection) = Transaction::change_by_selection_ignore_overlapping(
             doc,
             selection,
             |range| {
@@ -423,6 +421,11 @@ pub mod util {
             return transaction;
         }
 
+        // Don't normalize to avoid merging/reording selections which would
+        // break the association between tabstops and selections. Most ranges
+        // will be replaced by tabstops anyways and the final selection will be
+        // normalized anyways
+        selection = selection.map_no_normalize(changes);
         let mut mapped_selection = SmallVec::with_capacity(selection.len());
         let mut mapped_primary_idx = 0;
         let primary_range = selection.primary();
@@ -431,7 +434,6 @@ pub mod util {
                 mapped_primary_idx = mapped_selection.len()
             }
 
-            let range = range.map(changes);
             let tabstops = tabstops.first().filter(|tabstops| !tabstops.is_empty());
             let Some(tabstops) = tabstops else {
                 // no tabstop normal mapping
@@ -546,6 +548,7 @@ pub enum MethodCall {
     WorkspaceFolders,
     WorkspaceConfiguration(lsp::ConfigurationParams),
     RegisterCapability(lsp::RegistrationParams),
+    UnregisterCapability(lsp::UnregistrationParams),
 }
 
 impl MethodCall {
@@ -569,6 +572,10 @@ impl MethodCall {
                 let params: lsp::RegistrationParams = params.parse()?;
                 Self::RegisterCapability(params)
             }
+            lsp::request::UnregisterCapability::METHOD => {
+                let params: lsp::UnregistrationParams = params.parse()?;
+                Self::UnregisterCapability(params)
+            }
             _ => {
                 return Err(Error::Unhandled);
             }
@@ -624,24 +631,21 @@ impl Notification {
 
 #[derive(Debug)]
 pub struct Registry {
-    inner: HashMap<LanguageId, Vec<(usize, Arc<Client>)>>,
-
-    counter: AtomicUsize,
+    inner: HashMap<LanguageServerName, Vec<Arc<Client>>>,
+    syn_loader: Arc<helix_core::syntax::Loader>,
+    counter: usize,
     pub incoming: SelectAll<UnboundedReceiverStream<(usize, Call)>>,
-}
-
-impl Default for Registry {
-    fn default() -> Self {
-        Self::new()
-    }
+    pub file_event_handler: file_event::Handler,
 }
 
 impl Registry {
-    pub fn new() -> Self {
+    pub fn new(syn_loader: Arc<helix_core::syntax::Loader>) -> Self {
         Self {
             inner: HashMap::new(),
-            counter: AtomicUsize::new(0),
+            syn_loader,
+            counter: 0,
             incoming: SelectAll::new(),
+            file_event_handler: file_event::Handler::new(),
         }
     }
 
@@ -649,65 +653,95 @@ impl Registry {
         self.inner
             .values()
             .flatten()
-            .find(|(client_id, _)| client_id == &id)
-            .map(|(_, client)| client.as_ref())
+            .find(|client| client.id() == id)
+            .map(|client| &**client)
     }
 
     pub fn remove_by_id(&mut self, id: usize) {
-        self.inner.retain(|_, clients| {
-            clients.retain(|&(client_id, _)| client_id != id);
-            !clients.is_empty()
-        })
+        self.file_event_handler.remove_client(id);
+        self.inner.retain(|_, language_servers| {
+            language_servers.retain(|ls| id != ls.id());
+            !language_servers.is_empty()
+        });
     }
 
-    pub fn restart(
+    fn start_client(
         &mut self,
-        language_config: &LanguageConfiguration,
+        name: String,
+        ls_config: &LanguageConfiguration,
         doc_path: Option<&std::path::PathBuf>,
         root_dirs: &[PathBuf],
         enable_snippets: bool,
-    ) -> Result<Option<Arc<Client>>> {
-        let config = match &language_config.language_server {
-            Some(config) => config,
-            None => return Ok(None),
-        };
-
-        let scope = language_config.scope.clone();
-
-        match self.inner.entry(scope) {
-            Entry::Vacant(_) => Ok(None),
-            Entry::Occupied(mut entry) => {
-                // initialize a new client
-                let id = self.counter.fetch_add(1, Ordering::Relaxed);
-
-                let NewClientResult(client, incoming) = start_client(
+    ) -> Result<Arc<Client>> {
+        let config = self
+            .syn_loader
+            .language_server_configs()
+            .get(&name)
+            .ok_or_else(|| anyhow::anyhow!("Language server '{name}' not defined"))?;
+        let id = self.counter;
+        self.counter += 1;
+        let NewClient(client, incoming) = start_client(
             id,
-                    language_config,
+            name,
+            ls_config,
             config,
             doc_path,
             root_dirs,
             enable_snippets,
         )?;
         self.incoming.push(UnboundedReceiverStream::new(incoming));
+        Ok(client)
+    }
 
-                let old_clients = entry.insert(vec![(id, client.clone())]);
+    /// If this method is called, all documents that have a reference to language servers used by the language config have to refresh their language servers,
+    /// as it could be that language servers of these documents were stopped by this method.
+    /// See helix_view::editor::Editor::refresh_language_servers
+    pub fn restart(
+        &mut self,
+        language_config: &LanguageConfiguration,
+        doc_path: Option<&std::path::PathBuf>,
+        root_dirs: &[PathBuf],
+        enable_snippets: bool,
+    ) -> Result<Vec<Arc<Client>>> {
+        language_config
+            .language_servers
+            .iter()
+            .filter_map(|LanguageServerFeatures { name, .. }| {
+                if self.inner.contains_key(name) {
+                    let client = match self.start_client(
+                        name.clone(),
+                        language_config,
+                        doc_path,
+                        root_dirs,
+                        enable_snippets,
+                    ) {
+                        Ok(client) => client,
+                        error => return Some(error),
+                    };
+                    let old_clients = self
+                        .inner
+                        .insert(name.clone(), vec![client.clone()])
+                        .unwrap();
 
-                for (_, old_client) in old_clients {
+                    for old_client in old_clients {
+                        self.file_event_handler.remove_client(old_client.id());
                         tokio::spawn(async move {
                             let _ = old_client.force_shutdown().await;
                         });
                     }
 
-                Ok(Some(client))
-            }
+                    Some(Ok(client))
+                } else {
+                    None
                 }
+            })
+            .collect()
     }
 
-    pub fn stop(&mut self, language_config: &LanguageConfiguration) {
-        let scope = language_config.scope.clone();
-
-        if let Some(clients) = self.inner.remove(&scope) {
-            for (_, client) in clients {
+    pub fn stop(&mut self, name: &str) {
+        if let Some(clients) = self.inner.remove(name) {
+            for client in clients {
+                self.file_event_handler.remove_client(client.id());
                 tokio::spawn(async move {
                     let _ = client.force_shutdown().await;
                 });
@@ -721,37 +755,34 @@ impl Registry {
         doc_path: Option<&std::path::PathBuf>,
         root_dirs: &[PathBuf],
         enable_snippets: bool,
-    ) -> Result<Option<Arc<Client>>> {
-        let config = match &language_config.language_server {
-            Some(config) => config,
-            None => return Ok(None),
-        };
-
-        let clients = self.inner.entry(language_config.scope.clone()).or_default();
-        // check if we already have a client for this documents root that we can reuse
-        if let Some((_, client)) = clients.iter_mut().enumerate().find(|(i, (_, client))| {
+    ) -> Result<HashMap<LanguageServerName, Arc<Client>>> {
+        language_config
+            .language_servers
+            .iter()
+            .map(|LanguageServerFeatures { name, .. }| {
+                if let Some(clients) = self.inner.get(name) {
+                    if let Some((_, client)) = clients.iter().enumerate().find(|(i, client)| {
                         client.try_add_doc(&language_config.roots, root_dirs, doc_path, *i == 0)
                     }) {
-            return Ok(Some(client.1.clone()));
+                        return Ok((name.to_owned(), client.clone()));
                     }
-        // initialize a new client
-        let id = self.counter.fetch_add(1, Ordering::Relaxed);
-
-        let NewClientResult(client, incoming) = start_client(
-            id,
+                }
+                let client = self.start_client(
+                    name.clone(),
                     language_config,
-            config,
                     doc_path,
                     root_dirs,
                     enable_snippets,
                 )?;
-        clients.push((id, client.clone()));
-        self.incoming.push(UnboundedReceiverStream::new(incoming));
-        Ok(Some(client))
+                let clients = self.inner.entry(name.clone()).or_default();
+                clients.push(client.clone());
+                Ok((name.clone(), client))
+            })
+            .collect()
     }
 
     pub fn iter_clients(&self) -> impl Iterator<Item = &Arc<Client>> {
-        self.inner.values().flatten().map(|(_, client)| client)
+        self.inner.values().flatten()
     }
 }
 
@@ -833,26 +864,28 @@ impl LspProgressMap {
     }
 }
 
-struct NewClientResult(Arc<Client>, UnboundedReceiver<(usize, Call)>);
+struct NewClient(Arc<Client>, UnboundedReceiver<(usize, Call)>);
 
 /// start_client takes both a LanguageConfiguration and a LanguageServerConfiguration to ensure that
 /// it is only called when it makes sense.
 fn start_client(
     id: usize,
+    name: String,
     config: &LanguageConfiguration,
     ls_config: &LanguageServerConfiguration,
     doc_path: Option<&std::path::PathBuf>,
     root_dirs: &[PathBuf],
     enable_snippets: bool,
-) -> Result<NewClientResult> {
+) -> Result<NewClient> {
     let (client, incoming, initialize_notify) = Client::start(
         &ls_config.command,
         &ls_config.args,
-        config.config.clone(),
+        ls_config.config.clone(),
         ls_config.environment.clone(),
         &config.roots,
         config.workspace_lsp_roots.as_deref().unwrap_or(root_dirs),
         id,
+        name,
         ls_config.timeout,
         doc_path,
     )?;
@@ -886,7 +919,7 @@ fn start_client(
         initialize_notify.notify_one();
     });
 
-    Ok(NewClientResult(client, incoming))
+    Ok(NewClient(client, incoming))
 }
 
 /// Find an LSP workspace of a file using the following mechanism:
@@ -909,7 +942,7 @@ pub fn find_lsp_workspace(
     let mut file = if file.is_absolute() {
         file.to_path_buf()
     } else {
-        let current_dir = std::env::current_dir().expect("unable to determine current directory");
+        let current_dir = helix_loader::current_working_dir();
         current_dir.join(file)
     };
     file = path::get_normalized_path(&file);

helix-lsp/src/transport.rs

@@ -38,6 +38,7 @@ enum ServerMessage {
 #[derive(Debug)]
 pub struct Transport {
     id: usize,
+    name: String,
     pending_requests: Mutex<HashMap<jsonrpc::Id, Sender<Result<Value>>>>,
 }
 
@@ -47,6 +48,7 @@ impl Transport {
         server_stdin: BufWriter<ChildStdin>,
         server_stderr: BufReader<ChildStderr>,
         id: usize,
+        name: String,
     ) -> (
         UnboundedReceiver<(usize, jsonrpc::Call)>,
         UnboundedSender<Payload>,
@@ -58,6 +60,7 @@ impl Transport {
 
         let transport = Self {
             id,
+            name,
             pending_requests: Mutex::new(HashMap::default()),
         };
 
@@ -83,6 +86,7 @@ impl Transport {
     async fn recv_server_message(
         reader: &mut (impl AsyncBufRead + Unpin + Send),
         buffer: &mut String,
+        language_server_name: &str,
     ) -> Result<ServerMessage> {
         let mut content_length = None;
         loop {
@@ -124,7 +128,7 @@ impl Transport {
         reader.read_exact(&mut content).await?;
         let msg = std::str::from_utf8(&content).context("invalid utf8 from server")?;
 
-        info!("<- {}", msg);
+        info!("{language_server_name} <- {msg}");
 
         // try parsing as output (server response) or call (server request)
         let output: serde_json::Result<ServerMessage> = serde_json::from_str(msg);
@@ -135,12 +139,13 @@ impl Transport {
     async fn recv_server_error(
         err: &mut (impl AsyncBufRead + Unpin + Send),
         buffer: &mut String,
+        language_server_name: &str,
     ) -> Result<()> {
         buffer.truncate(0);
         if err.read_line(buffer).await? == 0 {
             return Err(Error::StreamClosed);
         };
-        error!("err <- {:?}", buffer);
+        error!("{language_server_name} err <- {buffer:?}");
 
         Ok(())
     }
@@ -162,15 +167,17 @@ impl Transport {
             Payload::Notification(value) => serde_json::to_string(&value)?,
             Payload::Response(error) => serde_json::to_string(&error)?,
         };
-        self.send_string_to_server(server_stdin, json).await
+        self.send_string_to_server(server_stdin, json, &self.name)
+            .await
     }
 
     async fn send_string_to_server(
         &self,
         server_stdin: &mut BufWriter<ChildStdin>,
         request: String,
+        language_server_name: &str,
     ) -> Result<()> {
-        info!("-> {}", request);
+        info!("{language_server_name} -> {request}");
 
         // send the headers
         server_stdin
@@ -189,9 +196,13 @@ impl Transport {
         &self,
         client_tx: &UnboundedSender<(usize, jsonrpc::Call)>,
         msg: ServerMessage,
+        language_server_name: &str,
     ) -> Result<()> {
         match msg {
-            ServerMessage::Output(output) => self.process_request_response(output).await?,
+            ServerMessage::Output(output) => {
+                self.process_request_response(output, language_server_name)
+                    .await?
+            }
             ServerMessage::Call(call) => {
                 client_tx
                     .send((self.id, call))
@@ -202,14 +213,18 @@ impl Transport {
         Ok(())
     }
 
-    async fn process_request_response(&self, output: jsonrpc::Output) -> Result<()> {
+    async fn process_request_response(
+        &self,
+        output: jsonrpc::Output,
+        language_server_name: &str,
+    ) -> Result<()> {
         let (id, result) = match output {
             jsonrpc::Output::Success(jsonrpc::Success { id, result, .. }) => {
-                info!("<- {}", result);
+                info!("{language_server_name} <- {}", result);
                 (id, Ok(result))
             }
             jsonrpc::Output::Failure(jsonrpc::Failure { id, error, .. }) => {
-                error!("<- {}", error);
+                error!("{language_server_name} <- {error}");
                 (id, Err(error.into()))
             }
         };
@@ -240,12 +255,17 @@ impl Transport {
     ) {
         let mut recv_buffer = String::new();
         loop {
-            match Self::recv_server_message(&mut server_stdout, &mut recv_buffer).await {
+            match Self::recv_server_message(&mut server_stdout, &mut recv_buffer, &transport.name)
+                .await
+            {
                 Ok(msg) => {
-                    match transport.process_server_message(&client_tx, msg).await {
+                    match transport
+                        .process_server_message(&client_tx, msg, &transport.name)
+                        .await
+                    {
                         Ok(_) => {}
                         Err(err) => {
-                            error!("err: <- {:?}", err);
+                            error!("{} err: <- {err:?}", transport.name);
                             break;
                         }
                     };
@@ -270,7 +290,7 @@ impl Transport {
                             params: jsonrpc::Params::None,
                         }));
                     match transport
-                        .process_server_message(&client_tx, notification)
+                        .process_server_message(&client_tx, notification, &transport.name)
                         .await
                     {
                         Ok(_) => {}
@@ -281,20 +301,22 @@ impl Transport {
                     break;
                 }
                 Err(err) => {
-                    error!("err: <- {:?}", err);
+                    error!("{} err: <- {err:?}", transport.name);
                     break;
                 }
             }
         }
     }
 
-    async fn err(_transport: Arc<Self>, mut server_stderr: BufReader<ChildStderr>) {
+    async fn err(transport: Arc<Self>, mut server_stderr: BufReader<ChildStderr>) {
         let mut recv_buffer = String::new();
         loop {
-            match Self::recv_server_error(&mut server_stderr, &mut recv_buffer).await {
+            match Self::recv_server_error(&mut server_stderr, &mut recv_buffer, &transport.name)
+                .await
+            {
                 Ok(_) => {}
                 Err(err) => {
-                    error!("err: <- {:?}", err);
+                    error!("{} err: <- {err:?}", transport.name);
                     break;
                 }
             }
@@ -331,6 +353,11 @@ impl Transport {
             }
         }
 
+        fn is_shutdown(payload: &Payload) -> bool {
+            use lsp_types::request::{Request, Shutdown};
+            matches!(payload, Payload::Request { value: jsonrpc::MethodCall { method, .. }, .. } if method == Shutdown::METHOD)
+        }
+
         // TODO: events that use capabilities need to do the right thing
 
         loop {
@@ -348,10 +375,11 @@ impl Transport {
                         method: lsp_types::notification::Initialized::METHOD.to_string(),
                         params: jsonrpc::Params::None,
                     }));
-                    match transport.process_server_message(&client_tx, notification).await {
+                    let language_server_name = &transport.name;
+                    match transport.process_server_message(&client_tx, notification, language_server_name).await {
                         Ok(_) => {}
                         Err(err) => {
-                            error!("err: <- {:?}", err);
+                            error!("{language_server_name} err: <- {err:?}");
                         }
                     }
 
@@ -361,14 +389,17 @@ impl Transport {
                         match transport.send_payload_to_server(&mut server_stdin, msg).await {
                             Ok(_) => {}
                             Err(err) => {
-                                error!("err: <- {:?}", err);
+                                error!("{language_server_name} err: <- {err:?}");
                             }
                         }
                     }
                 }
                 msg = client_rx.recv() => {
                     if let Some(msg) = msg {
-                        if is_pending && !is_initialize(&msg) {
+                        if is_pending && is_shutdown(&msg) {
+                            log::info!("Language server not initialized, shutting down");
+                            break;
+                        } else if is_pending && !is_initialize(&msg) {
                             // ignore notifications
                             if let Payload::Notification(_) = msg {
                                 continue;
@@ -380,7 +411,7 @@ impl Transport {
                             match transport.send_payload_to_server(&mut server_stdin, msg).await {
                                 Ok(_) => {}
                                 Err(err) => {
-                                    error!("err: <- {:?}", err);
+                                    error!("{} err: <- {err:?}", transport.name);
                                 }
                             }
                         }

helix-term/.gitignore

@@ -1,4 +1 @@
 /target
-
-# This folder is used by `test_explorer` to create temporary folders needed for testing
-test_explorer

helix-term/Cargo.toml

@@ -24,6 +24,7 @@ path = "src/main.rs"
 
 [dependencies]
 helix-core = { version = "0.6", path = "../helix-core" }
+helix-event = { version = "0.6", path = "../helix-event" }
 helix-view = { version = "0.6", path = "../helix-view" }
 helix-lsp = { version = "0.6", path = "../helix-lsp" }
 helix-dap = { version = "0.6", path = "../helix-dap" }
@@ -31,13 +32,13 @@ helix-vcs = { version = "0.6", path = "../helix-vcs" }
 helix-loader = { version = "0.6", path = "../helix-loader" }
 
 anyhow = "1"
-once_cell = "1.17"
+once_cell = "1.18"
 
 which = "4.4"
 
 tokio = { version = "1", features = ["rt", "rt-multi-thread", "io-util", "io-std", "time", "process", "macros", "fs", "parking_lot"] }
 tui = { path = "../helix-tui", package = "helix-tui", default-features = false, features = ["crossterm"] }
-crossterm = { version = "0.26", features = ["event-stream"] }
+crossterm = { version = "0.27", features = ["event-stream"] }
 signal-hook = "0.3"
 tokio-stream = "0.1"
 futures-util = { version = "0.3", features = ["std", "async-await"], default-features = false }
@@ -49,7 +50,7 @@ chrono = { version = "0.4", default-features = false, features = ["clock"] }
 log = "0.4"
 
 # File picker
-fuzzy-matcher = "0.3"
+nucleo.workspace = true
 ignore = "0.4"
 # markdown doc rendering
 pulldown-cmark = { version = "0.9", default-features = false }
@@ -68,12 +69,15 @@ grep-searcher = "0.1.11"
 
 [target.'cfg(not(windows))'.dependencies]  # https://github.com/vorner/signal-hook/issues/100
 signal-hook-tokio = { version = "0.3", features = ["futures-v0_3"] }
-libc = "0.2.140"
+libc = "0.2.147"
+
+[target.'cfg(target_os = "macos")'.dependencies]
+crossterm = { version = "0.27", features = ["event-stream", "use-dev-tty"] }
 
 [build-dependencies]
 helix-loader = { version = "0.6", path = "../helix-loader" }
 
 [dev-dependencies]
-smallvec = "1.10"
-indoc = "2.0.1"
-tempfile = "3.4.0"
+smallvec = "1.11"
+indoc = "2.0.3"
+tempfile = "3.8.0"

helix-term/src/application.rs

@@ -5,13 +5,17 @@ use helix_core::{
     path::get_relative_path,
     pos_at_coords, syntax, Selection,
 };
-use helix_lsp::{lsp, util::lsp_pos_to_pos, LspProgressMap};
+use helix_lsp::{
+    lsp::{self, notification::Notification},
+    util::lsp_pos_to_pos,
+    LspProgressMap,
+};
 use helix_view::{
     align_view,
     document::DocumentSavedEventResult,
     editor::{ConfigEvent, EditorEvent},
     graphics::Rect,
-    icons, theme,
+    theme,
     tree::Layout,
     Align, Editor,
 };
@@ -21,20 +25,17 @@ use tui::backend::Backend;
 use crate::{
     args::Args,
     commands::apply_workspace_edit,
-    compositor::{self, Compositor, Event},
+    compositor::{Compositor, Event},
     config::Config,
     job::Jobs,
     keymap::Keymaps,
-    ui::{self, overlay::overlaid as overlayed, Explorer},
+    ui::{self, overlay::overlaid},
 };
 
 use log::{debug, error, warn};
-use std::{
-    io::{stdin, stdout},
-    path::Path,
-    sync::Arc,
-    time::{Duration, Instant},
-};
+#[cfg(not(feature = "integration"))]
+use std::io::stdout;
+use std::{collections::btree_map::Entry, io::stdin, path::Path, sync::Arc};
 
 use anyhow::{Context, Error};
 
@@ -44,8 +45,6 @@ use {signal_hook::consts::signal, signal_hook_tokio::Signals};
 #[cfg(windows)]
 type Signals = futures_util::stream::Empty<()>;
 
-const LSP_DEADLINE: Duration = Duration::from_millis(16);
-
 #[cfg(not(feature = "integration"))]
 use tui::backend::CrosstermBackend;
 
@@ -69,14 +68,12 @@ pub struct Application {
 
     #[allow(dead_code)]
     theme_loader: Arc<theme::Loader>,
-    icons_loader: Arc<icons::Loader>,
     #[allow(dead_code)]
     syn_loader: Arc<syntax::Loader>,
 
     signals: Signals,
     jobs: Jobs,
     lsp_progress: LspProgressMap,
-    last_render: Instant,
 }
 
 #[cfg(feature = "integration")]
@@ -112,9 +109,9 @@ impl Application {
 
         use helix_view::editor::Action;
 
-        let mut theme_and_icons_parent_dirs = vec![helix_loader::config_dir()];
-        theme_and_icons_parent_dirs.extend(helix_loader::runtime_dirs().iter().cloned());
-        let theme_loader = std::sync::Arc::new(theme::Loader::new(&theme_and_icons_parent_dirs));
+        let mut theme_parent_dirs = vec![helix_loader::config_dir()];
+        theme_parent_dirs.extend(helix_loader::runtime_dirs().iter().cloned());
+        let theme_loader = std::sync::Arc::new(theme::Loader::new(&theme_parent_dirs));
 
         let true_color = config.editor.true_color || crate::true_color();
         let theme = config
@@ -132,21 +129,6 @@ impl Application {
             })
             .unwrap_or_else(|| theme_loader.default_theme(true_color));
 
-        let icons_loader = std::sync::Arc::new(icons::Loader::new(&theme_and_icons_parent_dirs));
-        let icons = config
-            .icons
-            .as_ref()
-            .and_then(|icons| {
-                icons_loader
-                    .load(icons, &theme, true_color)
-                    .map_err(|e| {
-                        log::warn!("failed to load icons `{}` - {}", icons, e);
-                        e
-                    })
-                    .ok()
-            })
-            .unwrap_or_else(|| icons_loader.default(&theme));
-
         let syn_loader = std::sync::Arc::new(syntax::Loader::new(syn_loader_conf));
 
         #[cfg(not(feature = "integration"))]
@@ -162,48 +144,30 @@ impl Application {
         let mut editor = Editor::new(
             area,
             theme_loader.clone(),
-            icons_loader.clone(),
             syn_loader.clone(),
             Arc::new(Map::new(Arc::clone(&config), |config: &Config| {
                 &config.editor
             })),
         );
 
-        editor.set_theme(theme);
-        editor.set_icons(icons);
-
         let keys = Box::new(Map::new(Arc::clone(&config), |config: &Config| {
             &config.keys
         }));
-        let mut editor_view = Box::new(ui::EditorView::new(Keymaps::new(keys)));
-
-        let mut jobs = Jobs::new();
-
-        if args.show_explorer {
-            let mut context = compositor::Context {
-                editor: &mut editor,
-                scroll: None,
-                jobs: &mut jobs,
-            };
-            let mut explorer = Explorer::new(&mut context)?;
-            explorer.unfocus();
-            editor_view.explorer = Some(explorer);
-        }
-
+        let editor_view = Box::new(ui::EditorView::new(Keymaps::new(keys)));
         compositor.push(editor_view);
 
         if args.load_tutor {
             let path = helix_loader::runtime_file(Path::new("tutor"));
             editor.open(&path, Action::VerticalSplit)?;
             // Unset path to prevent accidentally saving to the original tutor file.
-            doc_mut!(editor).set_path(None)?;
+            doc_mut!(editor).set_path(None);
         } else if !args.files.is_empty() {
             let first = &args.files[0].0; // we know it's not empty
             if first.is_dir() {
-                std::env::set_current_dir(first).context("set current dir")?;
+                helix_loader::set_current_working_dir(first.clone())?;
                 editor.new_file(Action::VerticalSplit);
-                let picker = ui::file_picker(".".into(), &config.load().editor, &editor.icons);
-                compositor.push(Box::new(overlayed(picker)));
+                let picker = ui::file_picker(".".into(), &config.load().editor);
+                compositor.push(Box::new(overlaid(picker)));
             } else {
                 let nr_of_files = args.files.len();
                 for (i, (file, pos)) in args.files.into_iter().enumerate() {
@@ -248,21 +212,24 @@ impl Application {
             }
         } else if stdin().is_tty() || cfg!(feature = "integration") {
             editor.new_file(Action::VerticalSplit);
-        } else if cfg!(target_os = "macos") {
-            // On Linux and Windows, we allow the output of a command to be piped into the new buffer.
-            // This doesn't currently work on macOS because of the following issue:
-            //   https://github.com/crossterm-rs/crossterm/issues/500
-            anyhow::bail!("Piping into helix-term is currently not supported on macOS");
         } else {
             editor
                 .new_file_from_stdin(Action::VerticalSplit)
                 .unwrap_or_else(|_| editor.new_file(Action::VerticalSplit));
         }
 
+        editor.set_theme(theme);
+
         #[cfg(windows)]
         let signals = futures_util::stream::empty();
         #[cfg(not(windows))]
-        let signals = Signals::new([signal::SIGTSTP, signal::SIGCONT, signal::SIGUSR1])
+        let signals = Signals::new([
+            signal::SIGTSTP,
+            signal::SIGCONT,
+            signal::SIGUSR1,
+            signal::SIGTERM,
+            signal::SIGINT,
+        ])
         .context("build signal handler")?;
 
         let app = Self {
@@ -273,35 +240,30 @@ impl Application {
             config,
 
             theme_loader,
-            icons_loader,
             syn_loader,
 
             signals,
-            jobs,
+            jobs: Jobs::new(),
             lsp_progress: LspProgressMap::new(),
-            last_render: Instant::now(),
         };
 
         Ok(app)
     }
 
     async fn render(&mut self) {
+        if self.compositor.full_redraw {
+            self.terminal.clear().expect("Cannot clear the terminal");
+            self.compositor.full_redraw = false;
+        }
+
         let mut cx = crate::compositor::Context {
             editor: &mut self.editor,
             jobs: &mut self.jobs,
             scroll: None,
         };
 
-        // Acquire mutable access to the redraw_handle lock
-        // to ensure that there are no tasks running that want to block rendering
-        drop(cx.editor.redraw_handle.1.write().await);
+        helix_event::start_frame();
         cx.editor.needs_redraw = false;
-        {
-            // exhaust any leftover redraw notifications
-            let notify = cx.editor.redraw_handle.0.notified();
-            tokio::pin!(notify);
-            notify.enable();
-        }
 
         let area = self
             .terminal
@@ -323,10 +285,9 @@ impl Application {
 
     pub async fn event_loop<S>(&mut self, input_stream: &mut S)
     where
-        S: Stream<Item = crossterm::Result<crossterm::event::Event>> + Unpin,
+        S: Stream<Item = std::io::Result<crossterm::event::Event>> + Unpin,
     {
         self.render().await;
-        self.last_render = Instant::now();
 
         loop {
             if !self.event_loop_until_idle(input_stream).await {
@@ -337,7 +298,7 @@ impl Application {
 
     pub async fn event_loop_until_idle<S>(&mut self, input_stream: &mut S) -> bool
     where
-        S: Stream<Item = crossterm::Result<crossterm::event::Event>> + Unpin,
+        S: Stream<Item = std::io::Result<crossterm::event::Event>> + Unpin,
     {
         loop {
             if self.editor.should_close() {
@@ -350,7 +311,9 @@ impl Application {
                 biased;
 
                 Some(signal) = self.signals.next() => {
-                    self.handle_signals(signal).await;
+                    if !self.handle_signals(signal).await {
+                        return false;
+                    };
                 }
                 Some(event) = input_stream.next() => {
                     self.handle_terminal_events(event).await;
@@ -394,6 +357,9 @@ impl Application {
             ConfigEvent::Update(editor_config) => {
                 let mut app_config = (*self.config.load().clone()).clone();
                 app_config.editor = *editor_config;
+                if let Err(err) = self.terminal.reconfigure(app_config.editor.clone().into()) {
+                    self.editor.set_error(err.to_string());
+                };
                 self.config.store(Arc::new(app_config));
             }
         }
@@ -446,27 +412,14 @@ impl Application {
         Ok(())
     }
 
-    /// Refresh icons after config change
-    fn refresh_icons(&mut self, config: &Config) -> Result<(), Error> {
-        if let Some(icons) = config.icons.clone() {
-            let true_color = config.editor.true_color || crate::true_color();
-            let icons = self
-                .icons_loader
-                .load(&icons, &self.editor.theme, true_color)
-                .map_err(|err| anyhow::anyhow!("Failed to load icons `{}`: {}", icons, err))?;
-            self.editor.set_icons(icons);
-        }
-
-        Ok(())
-    }
-
     fn refresh_config(&mut self) {
         let mut refresh_config = || -> Result<(), Error> {
             let default_config = Config::load_default()
                 .map_err(|err| anyhow::anyhow!("Failed to load config: {}", err))?;
             self.refresh_language_config()?;
             self.refresh_theme(&default_config)?;
-            self.refresh_icons(&default_config)?;
+            self.terminal
+                .reconfigure(default_config.editor.clone().into())?;
             // Store new config
             self.config.store(Arc::new(default_config));
             Ok(())
@@ -484,10 +437,12 @@ impl Application {
 
     #[cfg(windows)]
     // no signal handling available on windows
-    pub async fn handle_signals(&mut self, _signal: ()) {}
+    pub async fn handle_signals(&mut self, _signal: ()) -> bool {
+        true
+    }
 
     #[cfg(not(windows))]
-    pub async fn handle_signals(&mut self, signal: i32) {
+    pub async fn handle_signals(&mut self, signal: i32) -> bool {
         match signal {
             signal::SIGTSTP => {
                 self.restore_term().unwrap();
@@ -519,7 +474,17 @@ impl Application {
                 }
             }
             signal::SIGCONT => {
-                self.claim_term().await.unwrap();
+                // Copy/Paste from same issue from neovim:
+                // https://github.com/neovim/neovim/issues/12322
+                // https://github.com/neovim/neovim/pull/13084
+                for retries in 1..=10 {
+                    match self.claim_term().await {
+                        Ok(()) => break,
+                        Err(err) if retries == 10 => panic!("Failed to claim terminal: {}", err),
+                        Err(_) => continue,
+                    }
+                }
+
                 // redraw the terminal
                 let area = self.terminal.size().expect("couldn't get terminal size");
                 self.compositor.resize(area);
@@ -531,8 +496,14 @@ impl Application {
                 self.refresh_config();
                 self.render().await;
             }
+            signal::SIGTERM | signal::SIGINT => {
+                self.restore_term().unwrap();
+                return false;
+            }
             _ => unreachable!(),
         }
+
+        true
     }
 
     pub async fn handle_idle_timeout(&mut self) {
@@ -580,16 +551,7 @@ impl Application {
         let bytes = doc_save_event.text.len_bytes();
 
         if doc.path() != Some(&doc_save_event.path) {
-            if let Err(err) = doc.set_path(Some(&doc_save_event.path)) {
-                log::error!(
-                    "error setting path for doc '{:?}': {}",
-                    doc.path(),
-                    err.to_string(),
-                );
-
-                self.editor.set_error(err.to_string());
-                return;
-            }
+            doc.set_path(Some(&doc_save_event.path));
 
             let loader = self.editor.syn_loader.clone();
 
@@ -597,7 +559,7 @@ impl Application {
             let doc = doc_mut!(self.editor, &doc_save_event.doc_id);
             let id = doc.id();
             doc.detect_language(loader);
-            let _ = self.editor.refresh_language_server(id);
+            self.editor.refresh_language_servers(id);
         }
 
         // TODO: fix being overwritten by lsp
@@ -625,12 +587,7 @@ impl Application {
             EditorEvent::LanguageServerMessage((id, call)) => {
                 self.handle_language_server_message(call, id).await;
                 // limit render calls for fast language server messages
-                let last = self.editor.language_servers.incoming.is_empty();
-
-                if last || self.last_render.elapsed() > LSP_DEADLINE {
-                    self.render().await;
-                    self.last_render = Instant::now();
-                }
+                helix_event::request_redraw();
             }
             EditorEvent::DebuggerEvent(payload) => {
                 let needs_render = self.editor.handle_debugger_message(payload).await;
@@ -638,6 +595,9 @@ impl Application {
                     self.render().await;
                 }
             }
+            EditorEvent::Redraw => {
+                self.render().await;
+            }
             EditorEvent::IdleTimer => {
                 self.editor.clear_idle_timer();
                 self.handle_idle_timeout().await;
@@ -652,10 +612,7 @@ impl Application {
         false
     }
 
-    pub async fn handle_terminal_events(
-        &mut self,
-        event: Result<CrosstermEvent, crossterm::ErrorKind>,
-    ) {
+    pub async fn handle_terminal_events(&mut self, event: std::io::Result<CrosstermEvent>) {
         let mut cx = crate::compositor::Context {
             editor: &mut self.editor,
             jobs: &mut self.jobs,
@@ -695,6 +652,18 @@ impl Application {
     ) {
         use helix_lsp::{Call, MethodCall, Notification};
 
+        macro_rules! language_server {
+            () => {
+                match self.editor.language_server_by_id(server_id) {
+                    Some(language_server) => language_server,
+                    None => {
+                        warn!("can't find language server with id `{}`", server_id);
+                        return;
+                    }
+                }
+            };
+        }
+
         match call {
             Call::Notification(helix_lsp::jsonrpc::Notification { method, params, .. }) => {
                 let notification = match Notification::parse(&method, params) {
@@ -710,14 +679,7 @@ impl Application {
 
                 match notification {
                     Notification::Initialized => {
-                        let language_server =
-                            match self.editor.language_servers.get_by_id(server_id) {
-                                Some(language_server) => language_server,
-                                None => {
-                                    warn!("can't find language server with id `{}`", server_id);
-                                    return;
-                                }
-                            };
+                        let language_server = language_server!();
 
                         // Trigger a workspace/didChangeConfiguration notification after initialization.
                         // This might not be required by the spec but Neovim does this as well, so it's
@@ -726,9 +688,10 @@ impl Application {
                             tokio::spawn(language_server.did_change_configuration(config.clone()));
                         }
 
-                        let docs = self.editor.documents().filter(|doc| {
-                            doc.language_server().map(|server| server.id()) == Some(server_id)
-                        });
+                        let docs = self
+                            .editor
+                            .documents()
+                            .filter(|doc| doc.supports_language_server(server_id));
 
                         // trigger textDocument/didOpen for docs that are already open
                         for doc in docs {
@@ -748,7 +711,7 @@ impl Application {
                             ));
                         }
                     }
-                    Notification::PublishDiagnostics(mut params) => {
+                    Notification::PublishDiagnostics(params) => {
                         let path = match params.uri.to_file_path() {
                             Ok(path) => path,
                             Err(_) => {
@@ -756,6 +719,12 @@ impl Application {
                                 return;
                             }
                         };
+                        let language_server = language_server!();
+                        if !language_server.is_initialized() {
+                            log::error!("Discarding publishDiagnostic notification sent by an uninitialized server: {}", language_server.name());
+                            return;
+                        }
+                        let offset_encoding = language_server.offset_encoding();
                         let doc = self.editor.document_by_path_mut(&path).filter(|doc| {
                             if let Some(version) = params.version {
                                 if version != doc.version() {
@@ -778,18 +747,11 @@ impl Application {
                                     use helix_core::diagnostic::{Diagnostic, Range, Severity::*};
                                     use lsp::DiagnosticSeverity;
 
-                                    let language_server = if let Some(language_server) = doc.language_server() {
-                                        language_server
-                                    } else {
-                                        log::warn!("Discarding diagnostic because language server is not initialized: {:?}", diagnostic);
-                                        return None;
-                                    };
-
                                     // TODO: convert inside server
                                     let start = if let Some(start) = lsp_pos_to_pos(
                                         text,
                                         diagnostic.range.start,
-                                        language_server.offset_encoding(),
+                                        offset_encoding,
                                     ) {
                                         start
                                     } else {
@@ -797,11 +759,9 @@ impl Application {
                                         return None;
                                     };
 
-                                    let end = if let Some(end) = lsp_pos_to_pos(
-                                        text,
-                                        diagnostic.range.end,
-                                        language_server.offset_encoding(),
-                                    ) {
+                                    let end = if let Some(end) =
+                                        lsp_pos_to_pos(text, diagnostic.range.end, offset_encoding)
+                                    {
                                         end
                                     } else {
                                         log::warn!("lsp position out of bounds - {:?}", diagnostic);
@@ -840,14 +800,19 @@ impl Application {
                                         None => None,
                                     };
 
-                                    let tags = if let Some(ref tags) = diagnostic.tags {
-                                        let new_tags = tags.iter().filter_map(|tag| {
-                                            match *tag {
-                                                lsp::DiagnosticTag::DEPRECATED => Some(DiagnosticTag::Deprecated),
-                                                lsp::DiagnosticTag::UNNECESSARY => Some(DiagnosticTag::Unnecessary),
-                                                _ => None
+                                    let tags = if let Some(tags) = &diagnostic.tags {
+                                        let new_tags = tags
+                                            .iter()
+                                            .filter_map(|tag| match *tag {
+                                                lsp::DiagnosticTag::DEPRECATED => {
+                                                    Some(DiagnosticTag::Deprecated)
                                                 }
-                                        }).collect();
+                                                lsp::DiagnosticTag::UNNECESSARY => {
+                                                    Some(DiagnosticTag::Unnecessary)
+                                                }
+                                                _ => None,
+                                            })
+                                            .collect();
 
                                         new_tags
                                     } else {
@@ -863,25 +828,40 @@ impl Application {
                                         tags,
                                         source: diagnostic.source.clone(),
                                         data: diagnostic.data.clone(),
+                                        language_server_id: server_id,
                                     })
                                 })
                                 .collect();
 
-                            doc.set_diagnostics(diagnostics);
+                            doc.replace_diagnostics(diagnostics, server_id);
                         }
 
-                        // Sort diagnostics first by severity and then by line numbers.
-                        // Note: The `lsp::DiagnosticSeverity` enum is already defined in decreasing order
-                        params
+                        let mut diagnostics = params
                             .diagnostics
-                            .sort_unstable_by_key(|d| (d.severity, d.range.start));
+                            .into_iter()
+                            .map(|d| (d, server_id))
+                            .collect();
 
                         // Insert the original lsp::Diagnostics here because we may have no open document
                         // for diagnosic message and so we can't calculate the exact position.
                         // When using them later in the diagnostics picker, we calculate them on-demand.
-                        self.editor
-                            .diagnostics
-                            .insert(params.uri, params.diagnostics);
+                        match self.editor.diagnostics.entry(params.uri) {
+                            Entry::Occupied(o) => {
+                                let current_diagnostics = o.into_mut();
+                                // there may entries of other language servers, which is why we can't overwrite the whole entry
+                                current_diagnostics.retain(|(_, lsp_id)| *lsp_id != server_id);
+                                current_diagnostics.append(&mut diagnostics);
+                                // Sort diagnostics first by severity and then by line numbers.
+                                // Note: The `lsp::DiagnosticSeverity` enum is already defined in decreasing order
+                                current_diagnostics
+                                    .sort_unstable_by_key(|(d, _)| (d.severity, d.range.start));
+                            }
+                            Entry::Vacant(v) => {
+                                diagnostics
+                                    .sort_unstable_by_key(|(d, _)| (d.severity, d.range.start));
+                                v.insert(diagnostics);
+                            }
+                        };
                     }
                     Notification::ShowMessage(params) => {
                         log::warn!("unhandled window/showMessage: {:?}", params);
@@ -978,24 +958,18 @@ impl Application {
                     Notification::Exit => {
                         self.editor.set_status("Language server exited");
 
-                        // Clear any diagnostics for documents with this server open.
-                        let urls: Vec<_> = self
-                            .editor
-                            .documents_mut()
-                            .filter_map(|doc| {
-                                if doc.language_server().map(|server| server.id())
-                                    == Some(server_id)
-                                {
-                                    doc.set_diagnostics(Vec::new());
-                                    doc.url()
-                                } else {
-                                    None
+                        // LSPs may produce diagnostics for files that haven't been opened in helix,
+                        // we need to clear those and remove the entries from the list if this leads to
+                        // an empty diagnostic list for said files
+                        for diags in self.editor.diagnostics.values_mut() {
+                            diags.retain(|(_, lsp_id)| *lsp_id != server_id);
                         }
-                            })
-                            .collect();
 
-                        for url in urls {
-                            self.editor.diagnostics.remove(&url);
+                        self.editor.diagnostics.retain(|_, diags| !diags.is_empty());
+
+                        // Clear any diagnostics for documents with this server open.
+                        for doc in self.editor.documents_mut() {
+                            doc.clear_diagnostics(server_id);
                         }
 
                         // Remove the language server from the registry.
@@ -1046,9 +1020,12 @@ impl Application {
                         Ok(serde_json::Value::Null)
                     }
                     Ok(MethodCall::ApplyWorkspaceEdit(params)) => {
+                        let language_server = language_server!();
+                        if language_server.is_initialized() {
+                            let offset_encoding = language_server.offset_encoding();
                             let res = apply_workspace_edit(
                                 &mut self.editor,
-                            helix_lsp::OffsetEncoding::Utf8,
+                                offset_encoding,
                                 &params.edit,
                             );
 
@@ -1060,63 +1037,100 @@ impl Application {
                                     .err()
                                     .map(|err| err.failed_change_idx as u32),
                             }))
+                        } else {
+                            Err(helix_lsp::jsonrpc::Error {
+                                code: helix_lsp::jsonrpc::ErrorCode::InvalidRequest,
+                                message: "Server must be initialized to request workspace edits"
+                                    .to_string(),
+                                data: None,
+                            })
+                        }
                     }
                     Ok(MethodCall::WorkspaceFolders) => {
-                        let language_server =
-                            self.editor.language_servers.get_by_id(server_id).unwrap();
-
-                        Ok(json!(&*language_server.workspace_folders().await))
+                        Ok(json!(&*language_server!().workspace_folders().await))
                     }
                     Ok(MethodCall::WorkspaceConfiguration(params)) => {
+                        let language_server = language_server!();
                         let result: Vec<_> = params
                             .items
                             .iter()
                             .map(|item| {
-                                let mut config = match &item.scope_uri {
-                                    Some(scope) => {
-                                        let path = scope.to_file_path().ok()?;
-                                        let doc = self.editor.document_by_path(path)?;
-                                        doc.language_config()?.config.as_ref()?
-                                    }
-                                    None => self
-                                        .editor
-                                        .language_servers
-                                        .get_by_id(server_id)
-                                        .unwrap()
-                                        .config()?,
-                                };
+                                let mut config = language_server.config()?;
                                 if let Some(section) = item.section.as_ref() {
+                                    // for some reason some lsps send an empty string (observed in 'vscode-eslint-language-server')
+                                    if !section.is_empty() {
                                         for part in section.split('.') {
                                             config = config.get(part)?;
                                         }
                                     }
+                                }
                                 Some(config)
                             })
                             .collect();
                         Ok(json!(result))
                     }
-                    Ok(MethodCall::RegisterCapability(_params)) => {
-                        log::warn!("Ignoring a client/registerCapability request because dynamic capability registration is not enabled. Please report this upstream to the language server");
+                    Ok(MethodCall::RegisterCapability(params)) => {
+                        if let Some(client) = self
+                            .editor
+                            .language_servers
+                            .iter_clients()
+                            .find(|client| client.id() == server_id)
+                        {
+                            for reg in params.registrations {
+                                match reg.method.as_str() {
+                                    lsp::notification::DidChangeWatchedFiles::METHOD => {
+                                        let Some(options) = reg.register_options else {
+                                            continue;
+                                        };
+                                        let ops: lsp::DidChangeWatchedFilesRegistrationOptions =
+                                            match serde_json::from_value(options) {
+                                                Ok(ops) => ops,
+                                                Err(err) => {
+                                                    log::warn!("Failed to deserialize DidChangeWatchedFilesRegistrationOptions: {err}");
+                                                    continue;
+                                                }
+                                            };
+                                        self.editor.language_servers.file_event_handler.register(
+                                            client.id(),
+                                            Arc::downgrade(client),
+                                            reg.id,
+                                            ops,
+                                        )
+                                    }
+                                    _ => {
                                         // Language Servers based on the `vscode-languageserver-node` library often send
                                         // client/registerCapability even though we do not enable dynamic registration
-                        // for any capabilities. We should send a MethodNotFound JSONRPC error in this
+                                        // for most capabilities. We should send a MethodNotFound JSONRPC error in this
                                         // case but that rejects the registration promise in the server which causes an
                                         // exit. So we work around this by ignoring the request and sending back an OK
                                         // response.
+                                        log::warn!("Ignoring a client/registerCapability request because dynamic capability registration is not enabled. Please report this upstream to the language server");
+                                    }
+                                }
+                            }
+                        }
 
                         Ok(serde_json::Value::Null)
                     }
-                };
-
-                let language_server = match self.editor.language_servers.get_by_id(server_id) {
-                    Some(language_server) => language_server,
-                    None => {
-                        warn!("can't find language server with id `{}`", server_id);
-                        return;
+                    Ok(MethodCall::UnregisterCapability(params)) => {
+                        for unreg in params.unregisterations {
+                            match unreg.method.as_str() {
+                                lsp::notification::DidChangeWatchedFiles::METHOD => {
+                                    self.editor
+                                        .language_servers
+                                        .file_event_handler
+                                        .unregister(server_id, unreg.id);
+                                }
+                                _ => {
+                                    log::warn!("Received unregistration request for unsupported method: {}", unreg.method);
+                                }
+                            }
+                        }
+                        Ok(serde_json::Value::Null)
                     }
                 };
 
-                tokio::spawn(language_server.reply(id, reply));
+                tokio::spawn(language_server!().reply(id, reply));
             }
             Call::Invalid { id } => log::error!("LSP invalid method call id={:?}", id),
         }
@@ -1139,7 +1153,7 @@ impl Application {
 
     pub async fn run<S>(&mut self, input_stream: &mut S) -> Result<i32, Error>
     where
-        S: Stream<Item = crossterm::Result<crossterm::event::Event>> + Unpin,
+        S: Stream<Item = std::io::Result<crossterm::event::Event>> + Unpin,
     {
         self.claim_term().await?;
 

helix-term/src/args.rs

@@ -10,7 +10,6 @@ pub struct Args {
     pub health: bool,
     pub health_arg: Option<String>,
     pub load_tutor: bool,
-    pub show_explorer: bool,
     pub fetch_grammars: bool,
     pub build_grammars: bool,
     pub split: Option<Layout>,
@@ -33,7 +32,6 @@ impl Args {
                 "--version" => args.display_version = true,
                 "--help" => args.display_help = true,
                 "--tutor" => args.load_tutor = true,
-                "--show-explorer" => args.show_explorer = true,
                 "--vsplit" => match args.split {
                     Some(_) => anyhow::bail!("can only set a split once of a specific type"),
                     None => args.split = Some(Layout::Vertical),

helix-term/src/commands/dap.rs

@@ -2,13 +2,13 @@ use super::{Context, Editor};
 use crate::{
     compositor::{self, Compositor},
     job::{Callback, Jobs},
-    ui::{self, overlay::overlaid, FilePicker, Picker, Popup, Prompt, PromptEvent, Text},
+    ui::{self, overlay::overlaid, Picker, Popup, Prompt, PromptEvent, Text},
 };
 use dap::{StackFrame, Thread, ThreadStates};
 use helix_core::syntax::{DebugArgumentValue, DebugConfigCompletion, DebugTemplate};
 use helix_dap::{self as dap, Client};
 use helix_lsp::block_on;
-use helix_view::{editor::Breakpoint, icons::Icons};
+use helix_view::editor::Breakpoint;
 
 use serde_json::{to_value, Value};
 use tokio_stream::wrappers::UnboundedReceiverStream;
@@ -25,7 +25,7 @@ use helix_view::handlers::dap::{breakpoints_changed, jump_to_stack_frame, select
 impl ui::menu::Item for StackFrame {
     type Data = ();
 
-    fn format<'a>(&self, _data: &Self::Data, _icons: Option<&'a Icons>) -> Row {
+    fn format(&self, _data: &Self::Data) -> Row {
         self.name.as_str().into() // TODO: include thread_states in the label
     }
 }
@@ -33,7 +33,7 @@ impl ui::menu::Item for StackFrame {
 impl ui::menu::Item for DebugTemplate {
     type Data = ();
 
-    fn format<'a>(&self, _data: &Self::Data, _icons: Option<&'a Icons>) -> Row {
+    fn format(&self, _data: &Self::Data) -> Row {
         self.name.as_str().into()
     }
 }
@@ -41,7 +41,7 @@ impl ui::menu::Item for DebugTemplate {
 impl ui::menu::Item for Thread {
     type Data = ThreadStates;
 
-    fn format<'a>(&self, thread_states: &Self::Data, _icons: Option<&'a Icons>) -> Row {
+    fn format(&self, thread_states: &Self::Data) -> Row {
         format!(
             "{} ({})",
             self.name,
@@ -73,12 +73,10 @@ fn thread_picker(
             let debugger = debugger!(editor);
 
             let thread_states = debugger.thread_states.clone();
-            let picker = FilePicker::new(
-                threads,
-                thread_states,
-                None,
-                move |cx, thread, _action| callback_fn(cx.editor, thread),
-                move |editor, thread| {
+            let picker = Picker::new(threads, thread_states, move |cx, thread, _action| {
+                callback_fn(cx.editor, thread)
+            })
+            .with_preview(move |editor, thread| {
                 let frames = editor.debugger.as_ref()?.stack_frames.get(&thread.id)?;
                 let frame = frames.get(0)?;
                 let path = frame.source.as_ref()?.path.clone()?;
@@ -87,8 +85,7 @@ fn thread_picker(
                     frame.end_line.unwrap_or(frame.line).saturating_sub(1),
                 ));
                 Some((path.into(), pos))
-                },
-            );
+            });
             compositor.push(Box::new(picker));
         },
     );
@@ -220,7 +217,7 @@ pub fn dap_start_impl(
         }
     }
 
-    args.insert("cwd", to_value(std::env::current_dir().unwrap())?);
+    args.insert("cwd", to_value(helix_loader::current_working_dir())?);
 
     let args = to_value(args).unwrap();
 
@@ -274,7 +271,6 @@ pub fn dap_launch(cx: &mut Context) {
     cx.push_layer(Box::new(overlaid(Picker::new(
         templates,
         (),
-        None,
         |cx, template, _action| {
             let completions = template.completion.clone();
             let name = template.name.clone();
@@ -343,8 +339,12 @@ fn debug_parameter_prompt(
     .to_owned();
 
     let completer = match field_type {
-        "filename" => ui::completers::filename,
-        "directory" => ui::completers::directory,
+        "filename" => |editor: &Editor, input: &str| {
+            ui::completers::filename_with_git_ignore(editor, input, false)
+        },
+        "directory" => |editor: &Editor, input: &str| {
+            ui::completers::directory_with_git_ignore(editor, input, false)
+        },
         _ => ui::completers::none,
     };
 
@@ -582,7 +582,7 @@ pub fn dap_variables(cx: &mut Context) {
 
     let contents = Text::from(tui::text::Text::from(variables));
     let popup = Popup::new("dap-variables", contents);
-    cx.push_layer(Box::new(popup));
+    cx.replace_or_push_layer("dap-variables", popup);
 }
 
 pub fn dap_terminate(cx: &mut Context) {
@@ -730,11 +730,7 @@ pub fn dap_switch_stack_frame(cx: &mut Context) {
 
     let frames = debugger.stack_frames[&thread_id].clone();
 
-    let picker = FilePicker::new(
-        frames,
-        (),
-        None,
-        move |cx, frame, _action| {
+    let picker = Picker::new(frames, (), move |cx, frame, _action| {
         let debugger = debugger!(cx.editor);
         // TODO: this should be simpler to find
         let pos = debugger.stack_frames[&thread_id]
@@ -748,8 +744,8 @@ pub fn dap_switch_stack_frame(cx: &mut Context) {
         if let Some(frame) = &frame {
             jump_to_stack_frame(cx.editor, frame);
         }
-        },
-        move |_editor, frame| {
+    })
+    .with_preview(move |_editor, frame| {
         frame
             .source
             .as_ref()
@@ -763,7 +759,6 @@ pub fn dap_switch_stack_frame(cx: &mut Context) {
                     )),
                 )
             })
-        },
-    );
+    });
     cx.push_layer(Box::new(picker))
 }

helix-term/src/compositor.rs

@@ -16,6 +16,7 @@ pub enum EventResult {
 }
 
 use crate::job::Jobs;
+use crate::ui::picker;
 use helix_view::Editor;
 
 pub use helix_view::input::Event;
@@ -34,48 +35,6 @@ impl<'a> Context<'a> {
         tokio::task::block_in_place(|| helix_lsp::block_on(self.editor.flush_writes()))?;
         Ok(())
     }
-
-    /// Purpose: to test `handle_event` without escalating the test case to integration test
-    /// Usage:
-    /// ```
-    /// let mut editor = Context::dummy_editor();
-    /// let mut jobs = Context::dummy_jobs();
-    /// let mut cx = Context::dummy(&mut jobs, &mut editor);
-    /// ```
-    #[cfg(test)]
-    pub fn dummy(jobs: &'a mut Jobs, editor: &'a mut helix_view::Editor) -> Context<'a> {
-        Context {
-            jobs,
-            scroll: None,
-            editor,
-        }
-    }
-
-    #[cfg(test)]
-    pub fn dummy_jobs() -> Jobs {
-        Jobs::new()
-    }
-
-    #[cfg(test)]
-    pub fn dummy_editor() -> Editor {
-        use crate::config::Config;
-        use arc_swap::{access::Map, ArcSwap};
-        use helix_core::syntax::{self, Configuration};
-        use helix_view::{icons, theme};
-        use std::sync::Arc;
-
-        let config = Arc::new(ArcSwap::from_pointee(Config::default()));
-        Editor::new(
-            Rect::new(0, 0, 60, 120),
-            Arc::new(theme::Loader::new(&[])),
-            Arc::new(icons::Loader::new(&[])),
-            Arc::new(syntax::Loader::new(Configuration { language: vec![] })),
-            Arc::new(Arc::new(Map::new(
-                Arc::clone(&config),
-                |config: &Config| &config.editor,
-            ))),
-        )
-    }
 }
 
 pub trait Component: Any + AnyComponent {
@@ -114,21 +73,6 @@ pub trait Component: Any + AnyComponent {
     fn id(&self) -> Option<&'static str> {
         None
     }
-
-    #[cfg(test)]
-    /// Utility method for testing `handle_event` without using integration test.
-    /// Especially useful for testing helper components such as `Prompt`, `TreeView` etc
-    fn handle_events(&mut self, events: &str) -> anyhow::Result<()> {
-        use helix_view::input::parse_macro;
-
-        let mut editor = Context::dummy_editor();
-        let mut jobs = Context::dummy_jobs();
-        let mut cx = Context::dummy(&mut jobs, &mut editor);
-        for event in parse_macro(events)? {
-            self.handle_event(&Event::Key(event), &mut cx);
-        }
-        Ok(())
-    }
 }
 
 pub struct Compositor {
@@ -136,6 +80,7 @@ pub struct Compositor {
     area: Rect,
 
     pub(crate) last_picker: Option<Box<dyn Component>>,
+    pub(crate) full_redraw: bool,
 }
 
 impl Compositor {
@@ -144,6 +89,7 @@ impl Compositor {
             layers: Vec::new(),
             area,
             last_picker: None,
+            full_redraw: false,
         }
     }
 
@@ -157,6 +103,11 @@ impl Compositor {
 
     /// Add a layer to be rendered in front of all existing layers.
     pub fn push(&mut self, mut layer: Box<dyn Component>) {
+        // immediately clear last_picker field to avoid excessive memory
+        // consumption for picker with many items
+        if layer.id() == Some(picker::ID) {
+            self.last_picker = None;
+        }
         let size = self.size();
         // trigger required_size on init
         layer.required_size((size.width, size.height));
@@ -257,6 +208,10 @@ impl Compositor {
             .find(|component| component.id() == Some(id))
             .and_then(|component| component.as_any_mut().downcast_mut())
     }
+
+    pub fn need_full_redraw(&mut self) {
+        self.full_redraw = true;
+    }
 }
 
 // View casting, taken straight from Cursive

helix-term/src/config.rs

@@ -1,5 +1,5 @@
 use crate::keymap;
-use crate::keymap::{merge_keys, Keymap};
+use crate::keymap::{merge_keys, KeyTrie};
 use helix_loader::merge_toml_values;
 use helix_view::document::Mode;
 use serde::Deserialize;
@@ -12,8 +12,7 @@ use toml::de::Error as TomlError;
 #[derive(Debug, Clone, PartialEq)]
 pub struct Config {
     pub theme: Option<String>,
-    pub icons: Option<String>,
-    pub keys: HashMap<Mode, Keymap>,
+    pub keys: HashMap<Mode, KeyTrie>,
     pub editor: helix_view::editor::Config,
 }
 
@@ -21,8 +20,7 @@ pub struct Config {
 #[serde(deny_unknown_fields)]
 pub struct ConfigRaw {
     pub theme: Option<String>,
-    pub icons: Option<String>,
-    pub keys: Option<HashMap<Mode, Keymap>>,
+    pub keys: Option<HashMap<Mode, KeyTrie>>,
     pub editor: Option<toml::Value>,
 }
 
@@ -30,7 +28,6 @@ impl Default for Config {
     fn default() -> Config {
         Config {
             theme: None,
-            icons: None,
             keys: keymap::default(),
             editor: helix_view::editor::Config::default(),
         }
@@ -89,7 +86,6 @@ impl Config {
 
                 Config {
                     theme: local.theme.or(global.theme),
-                    icons: local.icons.or(global.icons),
                     keys,
                     editor,
                 }
@@ -106,7 +102,6 @@ impl Config {
                 }
                 Config {
                     theme: config.theme,
-                    icons: config.icons,
                     keys,
                     editor: config.editor.map_or_else(
                         || Ok(helix_view::editor::Config::default()),
@@ -114,6 +109,7 @@ impl Config {
                     )?,
                 }
             }
+
             // these are just two io errors return the one for the global config
             (Err(err), Err(_)) => return Err(err),
         };
@@ -143,7 +139,6 @@ mod tests {
     #[test]
     fn parsing_keymaps_config_file() {
         use crate::keymap;
-        use crate::keymap::Keymap;
         use helix_core::hashmap;
         use helix_view::document::Mode;
 
@@ -160,13 +155,13 @@ mod tests {
         merge_keys(
             &mut keys,
             hashmap! {
-                Mode::Insert => Keymap::new(keymap!({ "Insert mode"
+                Mode::Insert => keymap!({ "Insert mode"
                     "y" => move_line_down,
                     "S-C-a" => delete_selection,
-                })),
-                Mode::Normal => Keymap::new(keymap!({ "Normal mode"
+                }),
+                Mode::Normal => keymap!({ "Normal mode"
                     "A-F12" => move_next_word_end,
-                })),
+                }),
             },
         );
 

helix-term/src/health.rs

@@ -192,10 +192,14 @@ pub fn languages_all() -> std::io::Result<()> {
     for lang in &syn_loader_conf.language {
         column(&lang.language_id, Color::Reset);
 
-        let lsp = lang
+        // TODO multiple language servers (check binary for each supported language server, not just the first)
+
+        let lsp = lang.language_servers.first().and_then(|ls| {
+            syn_loader_conf
                 .language_server
-            .as_ref()
-            .map(|lsp| lsp.command.to_string());
+                .get(&ls.name)
+                .map(|config| config.command.clone())
+        });
         check_binary(lsp);
 
         let dap = lang.debugger.as_ref().map(|dap| dap.command.to_string());
@@ -264,11 +268,15 @@ pub fn language(lang_str: String) -> std::io::Result<()> {
         }
     };
 
+    // TODO multiple language servers
     probe_protocol(
         "language server",
-        lang.language_server
-            .as_ref()
-            .map(|lsp| lsp.command.to_string()),
+        lang.language_servers.first().and_then(|ls| {
+            syn_loader_conf
+                .language_server
+                .get(&ls.name)
+                .map(|config| config.command.clone())
+        }),
     )?;
 
     probe_protocol(

helix-term/src/keymap.rs

@@ -18,7 +18,7 @@ use std::{
 pub use default::default;
 use macros::key;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct KeyTrieNode {
     /// A label for keys coming under this node, like "Goto mode"
     name: String,
@@ -52,10 +52,6 @@ impl KeyTrieNode {
         }
     }
 
-    pub fn name(&self) -> &str {
-        &self.name
-    }
-
     /// Merge another Node in. Leaves and subnodes from the other node replace
     /// corresponding keyevent in self, except when both other and self have
     /// subnodes for same key. In that case the merge is recursive.
@@ -77,49 +73,40 @@ impl KeyTrieNode {
     }
 
     pub fn infobox(&self) -> Info {
-        let mut body: Vec<(&str, BTreeSet<KeyEvent>)> = Vec::with_capacity(self.len());
+        let mut body: Vec<(BTreeSet<KeyEvent>, &str)> = Vec::with_capacity(self.len());
         for (&key, trie) in self.iter() {
             let desc = match trie {
-                KeyTrie::Leaf(cmd) => {
+                KeyTrie::MappableCommand(cmd) => {
                     if cmd.name() == "no_op" {
                         continue;
                     }
                     cmd.doc()
                 }
-                KeyTrie::Node(n) => n.name(),
+                KeyTrie::Node(n) => &n.name,
                 KeyTrie::Sequence(_) => "[Multiple commands]",
             };
-            match body.iter().position(|(d, _)| d == &desc) {
+            match body.iter().position(|(_, d)| d == &desc) {
                 Some(pos) => {
-                    body[pos].1.insert(key);
+                    body[pos].0.insert(key);
                 }
-                None => body.push((desc, BTreeSet::from([key]))),
+                None => body.push((BTreeSet::from([key]), desc)),
             }
         }
-        body.sort_unstable_by_key(|(_, keys)| {
+        body.sort_unstable_by_key(|(keys, _)| {
             self.order
                 .iter()
                 .position(|&k| k == *keys.iter().next().unwrap())
                 .unwrap()
         });
-        let prefix = format!("{} ", self.name());
-        if body.iter().all(|(desc, _)| desc.starts_with(&prefix)) {
-            body = body
+
+        let body: Vec<_> = body
             .into_iter()
-                .map(|(desc, keys)| (desc.strip_prefix(&prefix).unwrap(), keys))
+            .map(|(events, desc)| {
+                let events = events.iter().map(ToString::to_string).collect::<Vec<_>>();
+                (events.join(", "), desc)
+            })
             .collect();
-        }
-        Info::from_keymap(self.name(), body)
-    }
-    /// Get a reference to the key trie node's order.
-    pub fn order(&self) -> &[KeyEvent] {
-        self.order.as_slice()
-    }
-}
-
-impl Default for KeyTrieNode {
-    fn default() -> Self {
-        Self::new("", HashMap::new(), Vec::new())
+        Info::new(&self.name, &body)
     }
 }
 
@@ -145,7 +132,7 @@ impl DerefMut for KeyTrieNode {
 
 #[derive(Debug, Clone, PartialEq)]
 pub enum KeyTrie {
-    Leaf(MappableCommand),
+    MappableCommand(MappableCommand),
     Sequence(Vec<MappableCommand>),
     Node(KeyTrieNode),
 }
@@ -174,7 +161,7 @@ impl<'de> serde::de::Visitor<'de> for KeyTrieVisitor {
     {
         command
             .parse::<MappableCommand>()
-            .map(KeyTrie::Leaf)
+            .map(KeyTrie::MappableCommand)
             .map_err(E::custom)
     }
 
@@ -208,17 +195,43 @@ impl<'de> serde::de::Visitor<'de> for KeyTrieVisitor {
 }
 
 impl KeyTrie {
+    pub fn reverse_map(&self) -> ReverseKeymap {
+        // recursively visit all nodes in keymap
+        fn map_node(cmd_map: &mut ReverseKeymap, node: &KeyTrie, keys: &mut Vec<KeyEvent>) {
+            match node {
+                KeyTrie::MappableCommand(cmd) => {
+                    let name = cmd.name();
+                    if name != "no_op" {
+                        cmd_map.entry(name.into()).or_default().push(keys.clone())
+                    }
+                }
+                KeyTrie::Node(next) => {
+                    for (key, trie) in &next.map {
+                        keys.push(*key);
+                        map_node(cmd_map, trie, keys);
+                        keys.pop();
+                    }
+                }
+                KeyTrie::Sequence(_) => {}
+            };
+        }
+
+        let mut res = HashMap::new();
+        map_node(&mut res, self, &mut Vec::new());
+        res
+    }
+
     pub fn node(&self) -> Option<&KeyTrieNode> {
         match *self {
             KeyTrie::Node(ref node) => Some(node),
-            KeyTrie::Leaf(_) | KeyTrie::Sequence(_) => None,
+            KeyTrie::MappableCommand(_) | KeyTrie::Sequence(_) => None,
         }
     }
 
     pub fn node_mut(&mut self) -> Option<&mut KeyTrieNode> {
         match *self {
             KeyTrie::Node(ref mut node) => Some(node),
-            KeyTrie::Leaf(_) | KeyTrie::Sequence(_) => None,
+            KeyTrie::MappableCommand(_) | KeyTrie::Sequence(_) => None,
         }
     }
 
@@ -235,7 +248,7 @@ impl KeyTrie {
             trie = match trie {
                 KeyTrie::Node(map) => map.get(key),
                 // leaf encountered while keys left to process
-                KeyTrie::Leaf(_) | KeyTrie::Sequence(_) => None,
+                KeyTrie::MappableCommand(_) | KeyTrie::Sequence(_) => None,
             }?
         }
         Some(trie)
@@ -256,75 +269,11 @@ pub enum KeymapResult {
     Cancelled(Vec<KeyEvent>),
 }
 
-#[derive(Debug, Clone, PartialEq, Deserialize)]
-#[serde(transparent)]
-pub struct Keymap {
-    /// Always a Node
-    root: KeyTrie,
-}
-
 /// A map of command names to keybinds that will execute the command.
 pub type ReverseKeymap = HashMap<String, Vec<Vec<KeyEvent>>>;
 
-impl Keymap {
-    pub fn new(root: KeyTrie) -> Self {
-        Keymap { root }
-    }
-
-    pub fn reverse_map(&self) -> ReverseKeymap {
-        // recursively visit all nodes in keymap
-        fn map_node(cmd_map: &mut ReverseKeymap, node: &KeyTrie, keys: &mut Vec<KeyEvent>) {
-            match node {
-                KeyTrie::Leaf(cmd) => match cmd {
-                    MappableCommand::Typable { name, .. } => {
-                        cmd_map.entry(name.into()).or_default().push(keys.clone())
-                    }
-                    MappableCommand::Static { name, .. } => cmd_map
-                        .entry(name.to_string())
-                        .or_default()
-                        .push(keys.clone()),
-                },
-                KeyTrie::Node(next) => {
-                    for (key, trie) in &next.map {
-                        keys.push(*key);
-                        map_node(cmd_map, trie, keys);
-                        keys.pop();
-                    }
-                }
-                KeyTrie::Sequence(_) => {}
-            };
-        }
-
-        let mut res = HashMap::new();
-        map_node(&mut res, &self.root, &mut Vec::new());
-        res
-    }
-
-    pub fn root(&self) -> &KeyTrie {
-        &self.root
-    }
-
-    pub fn merge(&mut self, other: Self) {
-        self.root.merge_nodes(other.root);
-    }
-}
-
-impl Deref for Keymap {
-    type Target = KeyTrieNode;
-
-    fn deref(&self) -> &Self::Target {
-        self.root.node().unwrap()
-    }
-}
-
-impl Default for Keymap {
-    fn default() -> Self {
-        Self::new(KeyTrie::Node(KeyTrieNode::default()))
-    }
-}
-
 pub struct Keymaps {
-    pub map: Box<dyn DynAccess<HashMap<Mode, Keymap>>>,
+    pub map: Box<dyn DynAccess<HashMap<Mode, KeyTrie>>>,
     /// Stores pending keys waiting for the next key. This is relative to a
     /// sticky node if one is in use.
     state: Vec<KeyEvent>,
@@ -333,7 +282,7 @@ pub struct Keymaps {
 }
 
 impl Keymaps {
-    pub fn new(map: Box<dyn DynAccess<HashMap<Mode, Keymap>>>) -> Self {
+    pub fn new(map: Box<dyn DynAccess<HashMap<Mode, KeyTrie>>>) -> Self {
         Self {
             map,
             state: Vec::new(),
@@ -341,7 +290,7 @@ impl Keymaps {
         }
     }
 
-    pub fn map(&self) -> DynGuard<HashMap<Mode, Keymap>> {
+    pub fn map(&self) -> DynGuard<HashMap<Mode, KeyTrie>> {
         self.map.load()
     }
 
@@ -373,11 +322,11 @@ impl Keymaps {
         let first = self.state.get(0).unwrap_or(&key);
         let trie_node = match self.sticky {
             Some(ref trie) => Cow::Owned(KeyTrie::Node(trie.clone())),
-            None => Cow::Borrowed(&keymap.root),
+            None => Cow::Borrowed(keymap),
         };
 
         let trie = match trie_node.search(&[*first]) {
-            Some(KeyTrie::Leaf(ref cmd)) => {
+            Some(KeyTrie::MappableCommand(ref cmd)) => {
                 return KeymapResult::Matched(cmd.clone());
             }
             Some(KeyTrie::Sequence(ref cmds)) => {
@@ -396,7 +345,7 @@ impl Keymaps {
                 }
                 KeymapResult::Pending(map.clone())
             }
-            Some(KeyTrie::Leaf(cmd)) => {
+            Some(KeyTrie::MappableCommand(cmd)) => {
                 self.state.clear();
                 KeymapResult::Matched(cmd.clone())
             }
@@ -416,9 +365,13 @@ impl Default for Keymaps {
 }
 
 /// Merge default config keys with user overwritten keys for custom user config.
-pub fn merge_keys(dst: &mut HashMap<Mode, Keymap>, mut delta: HashMap<Mode, Keymap>) {
+pub fn merge_keys(dst: &mut HashMap<Mode, KeyTrie>, mut delta: HashMap<Mode, KeyTrie>) {
     for (mode, keys) in dst {
-        keys.merge(delta.remove(mode).unwrap_or_default())
+        keys.merge_nodes(
+            delta
+                .remove(mode)
+                .unwrap_or_else(|| KeyTrie::Node(KeyTrieNode::default())),
+        )
     }
 }
 
@@ -447,8 +400,7 @@ mod tests {
     #[test]
     fn merge_partial_keys() {
         let keymap = hashmap! {
-            Mode::Normal => Keymap::new(
-                keymap!({ "Normal mode"
+            Mode::Normal => keymap!({ "Normal mode"
                 "i" => normal_mode,
                 "无" => insert_mode,
                 "z" => jump_backward,
@@ -457,7 +409,6 @@ mod tests {
                     "g" => delete_char_forward,
                 },
             })
-            )
         };
         let mut merged_keyamp = default();
         merge_keys(&mut merged_keyamp, keymap.clone());
@@ -484,32 +435,45 @@ mod tests {
         let keymap = merged_keyamp.get_mut(&Mode::Normal).unwrap();
         // Assumes that `g` is a node in default keymap
         assert_eq!(
-            keymap.root().search(&[key!('g'), key!('$')]).unwrap(),
-            &KeyTrie::Leaf(MappableCommand::goto_line_end),
+            keymap.search(&[key!('g'), key!('$')]).unwrap(),
+            &KeyTrie::MappableCommand(MappableCommand::goto_line_end),
             "Leaf should be present in merged subnode"
         );
         // Assumes that `gg` is in default keymap
         assert_eq!(
-            keymap.root().search(&[key!('g'), key!('g')]).unwrap(),
-            &KeyTrie::Leaf(MappableCommand::delete_char_forward),
+            keymap.search(&[key!('g'), key!('g')]).unwrap(),
+            &KeyTrie::MappableCommand(MappableCommand::delete_char_forward),
             "Leaf should replace old leaf in merged subnode"
         );
         // Assumes that `ge` is in default keymap
         assert_eq!(
-            keymap.root().search(&[key!('g'), key!('e')]).unwrap(),
-            &KeyTrie::Leaf(MappableCommand::goto_last_line),
+            keymap.search(&[key!('g'), key!('e')]).unwrap(),
+            &KeyTrie::MappableCommand(MappableCommand::goto_last_line),
             "Old leaves in subnode should be present in merged node"
         );
 
-        assert!(merged_keyamp.get(&Mode::Normal).unwrap().len() > 1);
-        assert!(merged_keyamp.get(&Mode::Insert).unwrap().len() > 0);
+        assert!(
+            merged_keyamp
+                .get(&Mode::Normal)
+                .and_then(|key_trie| key_trie.node())
+                .unwrap()
+                .len()
+                > 1
+        );
+        assert!(
+            merged_keyamp
+                .get(&Mode::Insert)
+                .and_then(|key_trie| key_trie.node())
+                .unwrap()
+                .len()
+                > 0
+        );
     }
 
     #[test]
     fn order_should_be_set() {
         let keymap = hashmap! {
-            Mode::Normal => Keymap::new(
-                keymap!({ "Normal mode"
+            Mode::Normal => keymap!({ "Normal mode"
                 "space" => { ""
                     "s" => { ""
                         "v" => vsplit,
@@ -517,7 +481,6 @@ mod tests {
                     },
                 },
             })
-            )
         };
         let mut merged_keyamp = default();
         merge_keys(&mut merged_keyamp, keymap.clone());
@@ -525,22 +488,19 @@ mod tests {
         let keymap = merged_keyamp.get_mut(&Mode::Normal).unwrap();
         // Make sure mapping works
         assert_eq!(
-            keymap
-                .root()
-                .search(&[key!(' '), key!('s'), key!('v')])
-                .unwrap(),
-            &KeyTrie::Leaf(MappableCommand::vsplit),
+            keymap.search(&[key!(' '), key!('s'), key!('v')]).unwrap(),
+            &KeyTrie::MappableCommand(MappableCommand::vsplit),
             "Leaf should be present in merged subnode"
         );
         // Make sure an order was set during merge
-        let node = keymap.root().search(&[crate::key!(' ')]).unwrap();
-        assert!(!node.node().unwrap().order().is_empty())
+        let node = keymap.search(&[crate::key!(' ')]).unwrap();
+        assert!(!node.node().unwrap().order.as_slice().is_empty())
     }
 
     #[test]
     fn aliased_modes_are_same_in_default_keymap() {
         let keymaps = Keymaps::default().map();
-        let root = keymaps.get(&Mode::Normal).unwrap().root();
+        let root = keymaps.get(&Mode::Normal).unwrap();
         assert_eq!(
             root.search(&[key!(' '), key!('w')]).unwrap(),
             root.search(&["C-w".parse::<KeyEvent>().unwrap()]).unwrap(),
@@ -563,7 +523,7 @@ mod tests {
             },
             "j" | "k" => move_line_down,
         });
-        let keymap = Keymap::new(normal_mode);
+        let keymap = normal_mode;
         let mut reverse_map = keymap.reverse_map();
 
         // sort keybindings in order to have consistent tests
@@ -611,7 +571,7 @@ mod tests {
             modifiers: KeyModifiers::NONE,
         };
 
-        let expectation = Keymap::new(KeyTrie::Node(KeyTrieNode::new(
+        let expectation = KeyTrie::Node(KeyTrieNode::new(
             "",
             hashmap! {
                 key => KeyTrie::Sequence(vec!{
@@ -628,7 +588,7 @@ mod tests {
                 })
             },
             vec![key],
-        )));
+        ));
 
         assert_eq!(toml::from_str(keys), Ok(expectation));
     }

helix-term/src/keymap/default.rs

@@ -1,10 +1,10 @@
 use std::collections::HashMap;
 
 use super::macros::keymap;
-use super::{Keymap, Mode};
+use super::{KeyTrie, Mode};
 use helix_core::hashmap;
 
-pub fn default() -> HashMap<Mode, Keymap> {
+pub fn default() -> HashMap<Mode, KeyTrie> {
     let normal = keymap!({ "Normal mode"
         "h" | "left" => move_char_left,
         "j" | "down" => move_visual_line_down,
@@ -79,6 +79,7 @@ pub fn default() -> HashMap<Mode, Keymap> {
 
         "s" => select_regex,
         "A-s" => split_selection_on_newline,
+        "A-minus" => merge_selections,
         "A-_" => merge_consecutive_selections,
         "S" => split_selection,
         ";" => collapse_selection,
@@ -87,6 +88,8 @@ pub fn default() -> HashMap<Mode, Keymap> {
         "A-i" | "A-down" => shrink_selection,
         "A-p" | "A-left" => select_prev_sibling,
         "A-n" | "A-right" => select_next_sibling,
+        "A-e" => move_parent_node_end,
+        "A-b" => move_parent_node_start,
 
         "%" => select_all,
         "x" => extend_line_below,
@@ -264,7 +267,7 @@ pub fn default() -> HashMap<Mode, Keymap> {
                     "C-v" | "v" => vsplit_new,
                 },
             },
-            "y" => yank_joined_to_clipboard,
+            "y" => yank_to_clipboard,
             "Y" => yank_main_selection_to_clipboard,
             "p" => paste_clipboard_after,
             "P" => paste_clipboard_before,
@@ -274,7 +277,6 @@ pub fn default() -> HashMap<Mode, Keymap> {
             "r" => rename_symbol,
             "h" => select_references_to_symbol_under_cursor,
             "?" => command_palette,
-            "e" => reveal_current_file,
         },
         "z" => { "View"
             "z" | "c" => align_view_center,
@@ -336,6 +338,9 @@ pub fn default() -> HashMap<Mode, Keymap> {
         "B" => extend_prev_long_word_start,
         "E" => extend_next_long_word_end,
 
+        "A-e" => extend_parent_node_end,
+        "A-b" => extend_parent_node_start,
+
         "n" => extend_search_next,
         "N" => extend_search_prev,
 
@@ -368,7 +373,8 @@ pub fn default() -> HashMap<Mode, Keymap> {
         "C-h" | "backspace" | "S-backspace" => delete_char_backward,
         "C-d" | "del" => delete_char_forward,
         "C-j" | "ret" => insert_newline,
-        "tab" => insert_tab,
+        "tab" => smart_tab,
+        "S-tab" => insert_tab,
 
         "up" => move_visual_line_up,
         "down" => move_visual_line_down,
@@ -380,8 +386,8 @@ pub fn default() -> HashMap<Mode, Keymap> {
         "end" => goto_line_end_newline,
     });
     hashmap!(
-        Mode::Normal => Keymap::new(normal),
-        Mode::Select => Keymap::new(select),
-        Mode::Insert => Keymap::new(insert),
+        Mode::Normal => normal,
+        Mode::Select => select,
+        Mode::Insert => insert,
     )
 }

helix-term/src/keymap/macros.rs

@@ -62,12 +62,11 @@ macro_rules! alt {
     };
 }
 
-/// Macro for defining the root of a `Keymap` object. Example:
+/// Macro for defining a `KeyTrie`. Example:
 ///
 /// ```
 /// # use helix_core::hashmap;
 /// # use helix_term::keymap;
-/// # use helix_term::keymap::Keymap;
 /// let normal_mode = keymap!({ "Normal mode"
 ///     "i" => insert_mode,
 ///     "g" => { "Goto"
@@ -76,12 +75,12 @@ macro_rules! alt {
 ///     },
 ///     "j" | "down" => move_line_down,
 /// });
-/// let keymap = Keymap::new(normal_mode);
+/// let keymap = normal_mode;
 /// ```
 #[macro_export]
 macro_rules! keymap {
     (@trie $cmd:ident) => {
-        $crate::keymap::KeyTrie::Leaf($crate::commands::MappableCommand::$cmd)
+        $crate::keymap::KeyTrie::MappableCommand($crate::commands::MappableCommand::$cmd)
     };
 
     (@trie

helix-term/src/main.rs

@@ -4,9 +4,8 @@ use helix_loader::VERSION_AND_GIT_HASH;
 use helix_term::application::Application;
 use helix_term::args::Args;
 use helix_term::config::{Config, ConfigLoadError};
-use std::path::PathBuf;
 
-fn setup_logging(logpath: PathBuf, verbosity: u64) -> Result<()> {
+fn setup_logging(verbosity: u64) -> Result<()> {
     let mut base_config = fern::Dispatch::new();
 
     base_config = match verbosity {
@@ -27,7 +26,7 @@ fn setup_logging(logpath: PathBuf, verbosity: u64) -> Result<()> {
                 message
             ))
         })
-        .chain(fern::log_file(logpath)?);
+        .chain(fern::log_file(helix_loader::log_file())?);
 
     base_config.chain(file_config).apply()?;
 
@@ -41,12 +40,6 @@ fn main() -> Result<()> {
 
 #[tokio::main]
 async fn main_impl() -> Result<i32> {
-    let logpath = helix_loader::log_file();
-    let parent = logpath.parent().unwrap();
-    if !parent.exists() {
-        std::fs::create_dir_all(parent).ok();
-    }
-
     let help = format!(
         "\
 {} {}
@@ -68,7 +61,7 @@ FLAGS:
     -g, --grammar {{fetch|build}}    Fetches or builds tree-sitter grammars listed in languages.toml
     -c, --config <file>            Specifies a file to use for configuration
     -v                             Increases logging verbosity each use for up to 3 times
-    --log                          Specifies a file to use for logging
+    --log <file>                   Specifies a file to use for logging
                                    (default file: {})
     -V, --version                  Prints version information
     --vsplit                       Splits all given files vertically into different windows
@@ -78,11 +71,14 @@ FLAGS:
         VERSION_AND_GIT_HASH,
         env!("CARGO_PKG_AUTHORS"),
         env!("CARGO_PKG_DESCRIPTION"),
-        logpath.display(),
+        helix_loader::default_log_file().display(),
     );
 
     let args = Args::parse_args().context("could not parse arguments")?;
 
+    helix_loader::initialize_config_file(args.config_file.clone());
+    helix_loader::initialize_log_file(args.log_file.clone());
+
     // Help has a higher priority and should be handled separately.
     if args.display_help {
         print!("{}", help);
@@ -116,15 +112,7 @@ FLAGS:
         return Ok(0);
     }
 
-    let logpath = args.log_file.as_ref().cloned().unwrap_or(logpath);
-    setup_logging(logpath, args.verbosity).context("failed to initialize logging")?;
-
-    let config_dir = helix_loader::config_dir();
-    if !config_dir.exists() {
-        std::fs::create_dir_all(&config_dir).ok();
-    }
-
-    helix_loader::initialize_config_file(args.config_file.clone());
+    setup_logging(args.verbosity).context("failed to initialize logging")?;
 
     let config = match Config::load_default() {
         Ok(config) => config,

helix-term/src/ui/completion.rs

@@ -2,7 +2,6 @@ use crate::compositor::{Component, Context, Event, EventResult};
 use helix_view::{
     document::SavePoint,
     editor::CompleteAction,
-    icons::Icons,
     theme::{Modifier, Style},
     ViewId,
 };
@@ -16,8 +15,7 @@ use helix_view::{graphics::Rect, Document, Editor};
 use crate::commands;
 use crate::ui::{menu, Markdown, Menu, Popup, PromptEvent};
 
-use helix_lsp::{lsp, util};
-use lsp::CompletionItem;
+use helix_lsp::{lsp, util, OffsetEncoding};
 
 impl menu::Item for CompletionItem {
     type Data = ();
@@ -27,29 +25,30 @@ impl menu::Item for CompletionItem {
 
     #[inline]
     fn filter_text(&self, _data: &Self::Data) -> Cow<str> {
-        self.filter_text
+        self.item
+            .filter_text
             .as_ref()
-            .unwrap_or(&self.label)
+            .unwrap_or(&self.item.label)
             .as_str()
             .into()
     }
 
-    // Before implementing icons for the `CompletionItemKind`s, something must be done to `Menu::required_size` and `Menu::recalculate_size` in order to have correct sizes even with icons.
-    fn format<'a>(&self, _data: &Self::Data, _icons: Option<&'a Icons>) -> menu::Row {
-        let deprecated = self.deprecated.unwrap_or_default()
-            || self.tags.as_ref().map_or(false, |tags| {
+    fn format(&self, _data: &Self::Data) -> menu::Row {
+        let deprecated = self.item.deprecated.unwrap_or_default()
+            || self.item.tags.as_ref().map_or(false, |tags| {
                 tags.contains(&lsp::CompletionItemTag::DEPRECATED)
             });
+
         menu::Row::new(vec![
             menu::Cell::from(Span::styled(
-                self.label.as_str(),
+                self.item.label.as_str(),
                 if deprecated {
                     Style::default().add_modifier(Modifier::CROSSED_OUT)
                 } else {
                     Style::default()
                 },
             )),
-            menu::Cell::from(match self.kind {
+            menu::Cell::from(match self.item.kind {
                 Some(lsp::CompletionItemKind::TEXT) => "text",
                 Some(lsp::CompletionItemKind::METHOD) => "method",
                 Some(lsp::CompletionItemKind::FUNCTION) => "function",
@@ -81,15 +80,17 @@ impl menu::Item for CompletionItem {
                 }
                 None => "",
             }),
-            // self.detail.as_deref().unwrap_or("")
-            // self.label_details
-            //     .as_ref()
-            //     .or(self.detail())
-            //     .as_str(),
         ])
     }
 }
 
+#[derive(Debug, PartialEq, Default, Clone)]
+pub struct CompletionItem {
+    pub item: lsp::CompletionItem,
+    pub language_server_id: usize,
+    pub resolved: bool,
+}
+
 /// Wraps a Menu.
 pub struct Completion {
     popup: Popup<Menu<CompletionItem>>,
@@ -106,21 +107,21 @@ impl Completion {
         editor: &Editor,
         savepoint: Arc<SavePoint>,
         mut items: Vec<CompletionItem>,
-        offset_encoding: helix_lsp::OffsetEncoding,
         start_offset: usize,
         trigger_offset: usize,
     ) -> Self {
+        let preview_completion_insert = editor.config().preview_completion_insert;
         let replace_mode = editor.config().completion_replace;
         // Sort completion items according to their preselect status (given by the LSP server)
-        items.sort_by_key(|item| !item.preselect.unwrap_or(false));
+        items.sort_by_key(|item| !item.item.preselect.unwrap_or(false));
 
         // Then create the menu
         let menu = Menu::new(items, (), move |editor: &mut Editor, item, event| {
             fn item_to_transaction(
                 doc: &Document,
                 view_id: ViewId,
-                item: &CompletionItem,
-                offset_encoding: helix_lsp::OffsetEncoding,
+                item: &lsp::CompletionItem,
+                offset_encoding: OffsetEncoding,
                 trigger_offset: usize,
                 include_placeholder: bool,
                 replace_mode: bool,
@@ -143,7 +144,9 @@ impl Completion {
                         }
                     };
 
-                    let Some(range) = util::lsp_range_to_range(doc.text(), edit.range, offset_encoding) else{
+                    let Some(range) =
+                        util::lsp_range_to_range(doc.text(), edit.range, offset_encoding)
+                    else {
                         return Transaction::new(doc.text());
                     };
 
@@ -211,77 +214,110 @@ impl Completion {
 
             let (view, doc) = current!(editor);
 
-            // if more text was entered, remove it
-            doc.restore(view, &savepoint);
+            macro_rules! language_server {
+                ($item:expr) => {
+                    match editor
+                        .language_servers
+                        .get_by_id($item.language_server_id)
+                    {
+                        Some(ls) => ls,
+                        None => {
+                            editor.set_error("completions are outdated");
+                            // TODO close the completion menu somehow,
+                            // currently there is no trivial way to access the EditorView to close the completion menu
+                            return;
+                        }
+                    }
+                };
+            }
 
             match event {
-                PromptEvent::Abort => {
-                    editor.last_completion = None;
+                PromptEvent::Abort => {}
+                PromptEvent::Update if preview_completion_insert => {
+                    // Update creates "ghost" transactions which are not sent to the
+                    // lsp server to avoid messing up re-requesting completions. Once a
+                    // completion has been selected (with tab, c-n or c-p) it's always accepted whenever anything
+                    // is typed. The only way to avoid that is to explicitly abort the completion
+                    // with c-c. This will remove the "ghost" transaction.
+                    //
+                    // The ghost transaction is modeled with a transaction that is not sent to the LS.
+                    // (apply_temporary) and a savepoint. It's extremely important this savepoint is restored
+                    // (also without sending the transaction to the LS) *before any further transaction is applied*.
+                    // Otherwise incremental sync breaks (since the state of the LS doesn't match the state the transaction
+                    // is applied to).
+                    if editor.last_completion.is_none() {
+                        editor.last_completion = Some(CompleteAction::Selected {
+                            savepoint: doc.savepoint(view),
+                        })
                     }
-                PromptEvent::Update => {
+                    // if more text was entered, remove it
+                    doc.restore(view, &savepoint, false);
                     // always present here
                     let item = item.unwrap();
 
                     let transaction = item_to_transaction(
                         doc,
                         view.id,
-                        item,
-                        offset_encoding,
+                        &item.item,
+                        language_server!(item).offset_encoding(),
                         trigger_offset,
                         true,
                         replace_mode,
                     );
-
-                    // initialize a savepoint
-                    doc.apply(&transaction, view.id);
-
-                    editor.last_completion = Some(CompleteAction {
-                        trigger_offset,
-                        changes: completion_changes(&transaction, trigger_offset),
-                    });
+                    doc.apply_temporary(&transaction, view.id);
                 }
+                PromptEvent::Update => {}
                 PromptEvent::Validate => {
+                    if let Some(CompleteAction::Selected { savepoint }) =
+                        editor.last_completion.take()
+                    {
+                        doc.restore(view, &savepoint, false);
+                    }
                     // always present here
-                    let item = item.unwrap();
+                    let mut item = item.unwrap().clone();
+
+                    let language_server = language_server!(item);
+                    let offset_encoding = language_server.offset_encoding();
+
+                    let language_server = editor
+                        .language_servers
+                        .get_by_id(item.language_server_id)
+                        .unwrap();
 
+                    // resolve item if not yet resolved
+                    if !item.resolved {
+                        if let Some(resolved) =
+                            Self::resolve_completion_item(language_server, item.item.clone())
+                        {
+                            item.item = resolved;
+                        }
+                    };
+                    // if more text was entered, remove it
+                    doc.restore(view, &savepoint, true);
+                    // save an undo checkpoint before the completion
+                    doc.append_changes_to_history(view);
                     let transaction = item_to_transaction(
                         doc,
                         view.id,
-                        item,
+                        &item.item,
                         offset_encoding,
                         trigger_offset,
                         false,
                         replace_mode,
                     );
-
                     doc.apply(&transaction, view.id);
 
-                    editor.last_completion = Some(CompleteAction {
+                    editor.last_completion = Some(CompleteAction::Applied {
                         trigger_offset,
                         changes: completion_changes(&transaction, trigger_offset),
                     });
 
-                    // apply additional edits, mostly used to auto import unqualified types
-                    let resolved_item = if item
-                        .additional_text_edits
-                        .as_ref()
-                        .map(|edits| !edits.is_empty())
-                        .unwrap_or(false)
-                    {
-                        None
-                    } else {
-                        Self::resolve_completion_item(doc, item.clone())
-                    };
-
-                    if let Some(additional_edits) = resolved_item
-                        .as_ref()
-                        .and_then(|item| item.additional_text_edits.as_ref())
-                        .or(item.additional_text_edits.as_ref())
-                    {
+                    // TODO: add additional _edits to completion_changes?
+                    if let Some(additional_edits) = item.item.additional_text_edits {
                         if !additional_edits.is_empty() {
                             let transaction = util::generate_transaction_from_edits(
                                 doc.text(),
-                                additional_edits.clone(),
+                                additional_edits,
                                 offset_encoding, // TODO: should probably transcode in Client
                             );
                             doc.apply(&transaction, view.id);
@@ -306,11 +342,9 @@ impl Completion {
     }
 
     fn resolve_completion_item(
-        doc: &Document,
+        language_server: &helix_lsp::Client,
         completion_item: lsp::CompletionItem,
-    ) -> Option<CompletionItem> {
-        let language_server = doc.language_server()?;
-
+    ) -> Option<lsp::CompletionItem> {
         let future = language_server.resolve_completion_item(completion_item)?;
         let response = helix_lsp::block_on(future);
         match response {
@@ -361,7 +395,7 @@ impl Completion {
         self.popup.contents().is_empty()
     }
 
-    fn replace_item(&mut self, old_item: lsp::CompletionItem, new_item: lsp::CompletionItem) {
+    fn replace_item(&mut self, old_item: CompletionItem, new_item: CompletionItem) {
         self.popup.contents_mut().replace_option(old_item, new_item);
     }
 
@@ -377,19 +411,21 @@ impl Completion {
         // > The returned completion item should have the documentation property filled in.
         // https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_completion
         let current_item = match self.popup.contents().selection() {
-            Some(item) if item.documentation.is_none() => item.clone(),
+            Some(item) if !item.resolved => item.clone(),
             _ => return false,
         };
 
-        let language_server = match doc!(cx.editor).language_server() {
-            Some(language_server) => language_server,
-            None => return false,
+        let Some(language_server) = cx
+            .editor
+            .language_server_by_id(current_item.language_server_id)
+        else {
+            return false;
         };
 
         // This method should not block the compositor so we handle the response asynchronously.
-        let future = match language_server.resolve_completion_item(current_item.clone()) {
-            Some(future) => future,
-            None => return false,
+        let Some(future) = language_server.resolve_completion_item(current_item.item.clone())
+        else {
+            return false;
         };
 
         cx.callback(
@@ -405,6 +441,12 @@ impl Completion {
                     .unwrap()
                     .completion
                 {
+                    let resolved_item = CompletionItem {
+                        item: resolved_item,
+                        language_server_id: current_item.language_server_id,
+                        resolved: true,
+                    };
+
                     completion.replace_item(current_item, resolved_item);
                 }
             },
@@ -459,25 +501,25 @@ impl Component for Completion {
             Markdown::new(md, cx.editor.syn_loader.clone())
         };
 
-        let mut markdown_doc = match &option.documentation {
+        let mut markdown_doc = match &option.item.documentation {
             Some(lsp::Documentation::String(contents))
             | Some(lsp::Documentation::MarkupContent(lsp::MarkupContent {
                 kind: lsp::MarkupKind::PlainText,
                 value: contents,
             })) => {
                 // TODO: convert to wrapped text
-                markdowned(language, option.detail.as_deref(), Some(contents))
+                markdowned(language, option.item.detail.as_deref(), Some(contents))
             }
             Some(lsp::Documentation::MarkupContent(lsp::MarkupContent {
                 kind: lsp::MarkupKind::Markdown,
                 value: contents,
             })) => {
                 // TODO: set language based on doc scope
-                markdowned(language, option.detail.as_deref(), Some(contents))
+                markdowned(language, option.item.detail.as_deref(), Some(contents))
             }
-            None if option.detail.is_some() => {
+            None if option.item.detail.is_some() => {
                 // TODO: set language based on doc scope
-                markdowned(language, option.detail.as_deref(), None)
+                markdowned(language, option.item.detail.as_deref(), None)
             }
             None => return,
         };

helix-term/src/ui/editor.rs

@@ -6,7 +6,7 @@ use crate::{
     keymap::{KeymapResult, Keymaps},
     ui::{
         document::{render_document, LinePos, TextRenderer, TranslatedPosition},
-        Completion, Explorer, ProgressSpinners,
+        Completion, ProgressSpinners,
     },
 };
 
@@ -19,11 +19,11 @@ use helix_core::{
     syntax::{self, HighlightEvent},
     text_annotations::TextAnnotations,
     unicode::width::UnicodeWidthStr,
-    visual_offset_from_block, Position, Range, Selection, Transaction,
+    visual_offset_from_block, Change, Position, Range, Selection, Transaction,
 };
 use helix_view::{
     document::{Mode, SavePoint, SCRATCH_BUFFER_NAME},
-    editor::{CompleteAction, CursorShapeConfig, ExplorerPosition},
+    editor::{CompleteAction, CursorShapeConfig},
     graphics::{Color, CursorKind, Modifier, Rect, Style},
     input::{KeyEvent, MouseButton, MouseEvent, MouseEventKind},
     keyboard::{KeyCode, KeyModifiers},
@@ -33,7 +33,7 @@ use std::{mem::take, num::NonZeroUsize, path::PathBuf, rc::Rc, sync::Arc};
 
 use tui::{buffer::Buffer as Surface, text::Span};
 
-use super::statusline;
+use super::{completion::CompletionItem, statusline};
 use super::{document::LineDecoration, lsp::SignatureHelp};
 
 pub struct EditorView {
@@ -43,13 +43,17 @@ pub struct EditorView {
     pub(crate) last_insert: (commands::MappableCommand, Vec<InsertEvent>),
     pub(crate) completion: Option<Completion>,
     spinners: ProgressSpinners,
-    pub(crate) explorer: Option<Explorer>,
+    /// Tracks if the terminal window is focused by reaction to terminal focus events
+    terminal_focused: bool,
 }
 
 #[derive(Debug, Clone)]
 pub enum InsertEvent {
     Key(KeyEvent),
-    CompletionApply(CompleteAction),
+    CompletionApply {
+        trigger_offset: usize,
+        changes: Vec<Change>,
+    },
     TriggerCompletion,
     RequestCompletion,
 }
@@ -69,7 +73,7 @@ impl EditorView {
             last_insert: (commands::MappableCommand::normal_mode, Vec::new()),
             completion: None,
             spinners: ProgressSpinners::default(),
-            explorer: None,
+            terminal_focused: true,
         }
     }
 
@@ -105,7 +109,7 @@ impl EditorView {
 
         // Set DAP highlights, if needed.
         if let Some(frame) = editor.current_stack_frame() {
-            let dap_line = frame.line.saturating_sub(1) as usize;
+            let dap_line = frame.line.saturating_sub(1);
             let style = theme.get("ui.highlight.frameline");
             let line_decoration = move |renderer: &mut TextRenderer, pos: LinePos| {
                 if pos.doc_line != dap_line {
@@ -162,15 +166,18 @@ impl EditorView {
             Box::new(highlights)
         };
 
+        let gutter_overflow = view.gutter_offset(doc) == 0;
+        if !gutter_overflow {
             Self::render_gutter(
                 editor,
                 doc,
                 view,
                 view.area,
                 theme,
-            is_focused,
+                is_focused & self.terminal_focused,
                 &mut line_decorations,
             );
+        }
 
         if is_focused {
             let cursor = doc
@@ -500,7 +507,9 @@ impl EditorView {
             use helix_core::match_brackets;
             let pos = doc.selection(view.id).primary().cursor(text);
 
-            if let Some(pos) = match_brackets::find_matching_bracket(syntax, doc.text(), pos) {
+            if let Some(pos) =
+                match_brackets::find_matching_bracket(syntax, doc.text().slice(..), pos)
+            {
                 // ensure col is on screen
                 if let Some(highlight) = theme.find_scope_index_exact("ui.cursor.match") {
                     return vec![(highlight, pos..pos + 1)];
@@ -533,24 +542,8 @@ impl EditorView {
 
         let mut x = viewport.x;
         let current_doc = view!(editor).doc;
-        let config = editor.config();
-        let icons_enabled = config.icons.bufferline;
 
         for doc in editor.documents() {
-            let filetype_icon = doc
-                .language_config()
-                .and_then(|config| {
-                    config
-                        .file_types
-                        .iter()
-                        .map(|filetype| match filetype {
-                            helix_core::syntax::FileType::Extension(s) => s,
-                            helix_core::syntax::FileType::Suffix(s) => s,
-                        })
-                        .find_map(|filetype| editor.icons.icon_from_filetype(filetype))
-                })
-                .or_else(|| editor.icons.icon_from_path(doc.path()));
-
             let fname = doc
                 .path()
                 .unwrap_or(&scratch)
@@ -569,22 +562,6 @@ impl EditorView {
             let used_width = viewport.x.saturating_sub(x);
             let rem_width = surface.area.width.saturating_sub(used_width);
 
-            if icons_enabled {
-                if let Some(icon) = filetype_icon {
-                    x = surface
-                        .set_stringn(
-                            x,
-                            viewport.y,
-                            format!(" {}", icon.icon_char),
-                            rem_width as usize,
-                            match icon.style {
-                                Some(s) => style.patch(s.into()),
-                                None => style,
-                            },
-                        )
-                        .0;
-                }
-            }
             x = surface
                 .set_stringn(x, viewport.y, text, rem_width as usize, style)
                 .0;
@@ -681,7 +658,7 @@ impl EditorView {
             .primary()
             .cursor(doc.text().slice(..));
 
-        let diagnostics = doc.diagnostics().iter().filter(|diagnostic| {
+        let diagnostics = doc.shown_diagnostics().filter(|diagnostic| {
             diagnostic.range.start <= cursor && diagnostic.range.end >= cursor
         });
 
@@ -847,7 +824,7 @@ impl EditorView {
                 }
                 (Mode::Insert, Mode::Normal) => {
                     // if exiting insert mode, remove completion
-                    self.completion = None;
+                    self.clear_completion(cxt.editor);
                     cxt.editor.completion_request_handle = None;
 
                     // TODO: Use an on_mode_change hook to remove signature help
@@ -925,22 +902,26 @@ impl EditorView {
                     for key in self.last_insert.1.clone() {
                         match key {
                             InsertEvent::Key(key) => self.insert_mode(cxt, key),
-                            InsertEvent::CompletionApply(compl) => {
+                            InsertEvent::CompletionApply {
+                                trigger_offset,
+                                changes,
+                            } => {
                                 let (view, doc) = current!(cxt.editor);
 
                                 if let Some(last_savepoint) = last_savepoint.as_deref() {
-                                    doc.restore(view, last_savepoint);
+                                    doc.restore(view, last_savepoint, true);
                                 }
 
                                 let text = doc.text().slice(..);
                                 let cursor = doc.selection(view.id).primary().cursor(text);
 
-                                let shift_position =
-                                    |pos: usize| -> usize { pos + cursor - compl.trigger_offset };
+                                let shift_position = |pos: usize| -> usize {
+                                    (pos + cursor).saturating_sub(trigger_offset)
+                                };
 
                                 let tx = Transaction::change(
                                     doc.text(),
-                                    compl.changes.iter().cloned().map(|(start, end, t)| {
+                                    changes.iter().cloned().map(|(start, end, t)| {
                                         (shift_position(start), shift_position(end), t)
                                     }),
                                 );
@@ -971,6 +952,8 @@ impl EditorView {
                 self.handle_keymap_event(mode, cxt, event);
                 if self.keymaps.pending().is_empty() {
                     cxt.editor.count = None
+                } else {
+                    cxt.editor.selected_register = cxt.register.take();
                 }
             }
         }
@@ -981,20 +964,13 @@ impl EditorView {
         &mut self,
         editor: &mut Editor,
         savepoint: Arc<SavePoint>,
-        items: Vec<helix_lsp::lsp::CompletionItem>,
-        offset_encoding: helix_lsp::OffsetEncoding,
+        items: Vec<CompletionItem>,
         start_offset: usize,
         trigger_offset: usize,
         size: Rect,
     ) -> Option<Rect> {
-        let mut completion = Completion::new(
-            editor,
-            savepoint,
-            items,
-            offset_encoding,
-            start_offset,
-            trigger_offset,
-        );
+        let mut completion =
+            Completion::new(editor, savepoint, items, start_offset, trigger_offset);
 
         if completion.is_empty() {
             // skip if we got no completion results
@@ -1013,6 +989,21 @@ impl EditorView {
 
     pub fn clear_completion(&mut self, editor: &mut Editor) {
         self.completion = None;
+        if let Some(last_completion) = editor.last_completion.take() {
+            match last_completion {
+                CompleteAction::Applied {
+                    trigger_offset,
+                    changes,
+                } => self.last_insert.1.push(InsertEvent::CompletionApply {
+                    trigger_offset,
+                    changes,
+                }),
+                CompleteAction::Selected { savepoint } => {
+                    let (view, doc) = current!(editor);
+                    doc.restore(view, &savepoint, false);
+                }
+            }
+        }
 
         // Clear any savepoints
         editor.clear_idle_timer(); // don't retrigger
@@ -1082,6 +1073,7 @@ impl EditorView {
                 let editor = &mut cxt.editor;
 
                 if let Some((pos, view_id)) = pos_and_view(editor, row, column, true) {
+                    let prev_view_id = view!(editor).id;
                     let doc = doc_mut!(editor, &view!(editor, view_id).doc);
 
                     if modifiers == KeyModifiers::ALT {
@@ -1091,6 +1083,10 @@ impl EditorView {
                         doc.set_selection(view_id, Selection::point(pos));
                     }
 
+                    if view_id != prev_view_id {
+                        self.clear_completion(editor);
+                    }
+
                     editor.focus(view_id);
                     editor.ensure_cursor_in_view(view_id);
 
@@ -1239,11 +1235,6 @@ impl Component for EditorView {
         event: &Event,
         context: &mut crate::compositor::Context,
     ) -> EventResult {
-        if let Some(explore) = self.explorer.as_mut() {
-            if let EventResult::Consumed(callback) = explore.handle_event(event, context) {
-                return EventResult::Consumed(callback);
-            }
-        }
         let mut cx = commands::Context {
             editor: context.editor,
             count: None,
@@ -1304,12 +1295,22 @@ impl Component for EditorView {
                                         jobs: cx.jobs,
                                         scroll: None,
                                     };
-                                    completion.handle_event(event, &mut cx)
-                                };
 
-                                if let EventResult::Consumed(callback) = res {
+                                    if let EventResult::Consumed(callback) =
+                                        completion.handle_event(event, &mut cx)
+                                    {
                                         consumed = true;
+                                        Some(callback)
+                                    } else if let EventResult::Consumed(callback) =
+                                        completion.handle_event(&Event::Key(key!(Enter)), &mut cx)
+                                    {
+                                        Some(callback)
+                                    } else {
+                                        None
+                                    }
+                                };
 
+                                if let Some(callback) = res {
                                     if callback.is_some() {
                                         // assume close_fn
                                         self.clear_completion(cx.editor);
@@ -1325,10 +1326,6 @@ impl Component for EditorView {
 
                             // if completion didn't take the event, we pass it onto commands
                             if !consumed {
-                                if let Some(compl) = cx.editor.last_completion.take() {
-                                    self.last_insert.1.push(InsertEvent::CompletionApply(compl));
-                                }
-
                                 self.insert_mode(&mut cx, key);
 
                                 // record last_insert key
@@ -1383,13 +1380,17 @@ impl Component for EditorView {
 
             Event::Mouse(event) => self.handle_mouse_event(event, &mut cx),
             Event::IdleTimeout => self.handle_idle_timeout(&mut cx),
-            Event::FocusGained => EventResult::Ignored(None),
+            Event::FocusGained => {
+                self.terminal_focused = true;
+                EventResult::Consumed(None)
+            }
             Event::FocusLost => {
                 if context.editor.config().auto_save {
                     if let Err(e) = commands::typed::write_all_impl(context, false, false) {
                         context.editor.set_error(format!("{}", e));
                     }
                 }
+                self.terminal_focused = false;
                 EventResult::Consumed(None)
             }
         }
@@ -1400,8 +1401,6 @@ impl Component for EditorView {
         surface.set_style(area, cx.editor.theme.get("ui.background"));
         let config = cx.editor.config();
 
-        let editor_area = area.clip_bottom(1);
-
         // check if bufferline should be rendered
         use helix_view::editor::BufferLine;
         let use_bufferline = match config.bufferline {
@@ -1410,43 +1409,15 @@ impl Component for EditorView {
             _ => false,
         };
 
-        let editor_area = if use_bufferline {
-            editor_area.clip_top(1)
-        } else {
-            editor_area
-        };
-
-        let editor_area = if let Some(explorer) = &self.explorer {
-            let explorer_column_width = if explorer.is_opened() {
-                explorer.column_width().saturating_add(2)
-            } else {
-                0
-            };
-            // For future developer:
-            // We should have a Dock trait that allows a component to dock to the top/left/bottom/right
-            // of another component.
-            match config.explorer.position {
-                ExplorerPosition::Left => editor_area.clip_left(explorer_column_width),
-                ExplorerPosition::Right => editor_area.clip_right(explorer_column_width),
+        // -1 for commandline and -1 for bufferline
+        let mut editor_area = area.clip_bottom(1);
+        if use_bufferline {
+            editor_area = editor_area.clip_top(1);
         }
-        } else {
-            editor_area
-        };
 
         // if the terminal size suddenly changed, we need to trigger a resize
         cx.editor.resize(editor_area);
 
-        if let Some(explorer) = self.explorer.as_mut() {
-            if !explorer.is_focus() {
-                let area = if use_bufferline {
-                    area.clip_top(1)
-                } else {
-                    area
-                };
-                explorer.render(area, surface, cx);
-            }
-        }
-
         if use_bufferline {
             Self::render_bufferline(cx.editor, area.with_height(1), surface);
         }
@@ -1525,47 +1496,9 @@ impl Component for EditorView {
         if let Some(completion) = self.completion.as_mut() {
             completion.render(area, surface, cx);
         }
-
-        if let Some(explore) = self.explorer.as_mut() {
-            let needs_update = explore.is_focus() || {
-                if let Some(current_document_path) = doc!(cx.editor).path().cloned() {
-                    if let Some(current_explore_path) = explore.current_file() {
-                        if *current_explore_path != current_document_path {
-                            let _ = explore.reveal_file(current_document_path);
-
-                            true
-                        } else {
-                            false
-                        }
-                    } else {
-                        let _ = explore.reveal_file(current_document_path);
-                        true
-                    }
-                } else {
-                    false
-                }
-            };
-
-            if needs_update {
-                let area = if use_bufferline {
-                    area.clip_top(1)
-                } else {
-                    area
-                };
-                explore.render(area, surface, cx);
-            }
-        }
     }
 
     fn cursor(&self, _area: Rect, editor: &Editor) -> (Option<Position>, CursorKind) {
-        if let Some(explore) = &self.explorer {
-            if explore.is_focus() {
-                let cursor = explore.cursor(_area, editor);
-                if cursor.0.is_some() {
-                    return cursor;
-                }
-            }
-        }
         match editor.cursor() {
             // All block cursors are drawn manually
             (pos, CursorKind::Block) => (pos, CursorKind::Hidden),

helix-term/src/ui/fuzzy_match.rs

@@ -1,239 +0,0 @@
-use fuzzy_matcher::skim::SkimMatcherV2 as Matcher;
-use fuzzy_matcher::FuzzyMatcher;
-
-#[cfg(test)]
-mod test;
-
-struct QueryAtom {
-    kind: QueryAtomKind,
-    atom: String,
-    ignore_case: bool,
-    inverse: bool,
-}
-impl QueryAtom {
-    fn new(atom: &str) -> Option<QueryAtom> {
-        let mut atom = atom.to_string();
-        let inverse = atom.starts_with('!');
-        if inverse {
-            atom.remove(0);
-        }
-
-        let mut kind = match atom.chars().next() {
-            Some('^') => QueryAtomKind::Prefix,
-            Some('\'') => QueryAtomKind::Substring,
-            _ if inverse => QueryAtomKind::Substring,
-            _ => QueryAtomKind::Fuzzy,
-        };
-
-        if atom.starts_with(['^', '\'']) {
-            atom.remove(0);
-        }
-
-        if atom.is_empty() {
-            return None;
-        }
-
-        if atom.ends_with('$') && !atom.ends_with("\\$") {
-            atom.pop();
-            kind = if kind == QueryAtomKind::Prefix {
-                QueryAtomKind::Exact
-            } else {
-                QueryAtomKind::Postfix
-            }
-        }
-
-        Some(QueryAtom {
-            kind,
-            atom: atom.replace('\\', ""),
-            // not ideal but fuzzy_matches only knows ascii uppercase so more consistent
-            // to behave the same
-            ignore_case: kind != QueryAtomKind::Fuzzy
-                && atom.chars().all(|c| c.is_ascii_lowercase()),
-            inverse,
-        })
-    }
-
-    fn indices(&self, matcher: &Matcher, item: &str, indices: &mut Vec<usize>) -> bool {
-        // for inverse there are no indices to return
-        // just return whether we matched
-        if self.inverse {
-            return self.matches(matcher, item);
-        }
-        let buf;
-        let item = if self.ignore_case {
-            buf = item.to_ascii_lowercase();
-            &buf
-        } else {
-            item
-        };
-        let off = match self.kind {
-            QueryAtomKind::Fuzzy => {
-                if let Some((_, fuzzy_indices)) = matcher.fuzzy_indices(item, &self.atom) {
-                    indices.extend_from_slice(&fuzzy_indices);
-                    return true;
-                } else {
-                    return false;
-                }
-            }
-            QueryAtomKind::Substring => {
-                if let Some(off) = item.find(&self.atom) {
-                    off
-                } else {
-                    return false;
-                }
-            }
-            QueryAtomKind::Prefix if item.starts_with(&self.atom) => 0,
-            QueryAtomKind::Postfix if item.ends_with(&self.atom) => item.len() - self.atom.len(),
-            QueryAtomKind::Exact if item == self.atom => 0,
-            _ => return false,
-        };
-
-        indices.extend(off..(off + self.atom.len()));
-        true
-    }
-
-    fn matches(&self, matcher: &Matcher, item: &str) -> bool {
-        let buf;
-        let item = if self.ignore_case {
-            buf = item.to_ascii_lowercase();
-            &buf
-        } else {
-            item
-        };
-        let mut res = match self.kind {
-            QueryAtomKind::Fuzzy => matcher.fuzzy_match(item, &self.atom).is_some(),
-            QueryAtomKind::Substring => item.contains(&self.atom),
-            QueryAtomKind::Prefix => item.starts_with(&self.atom),
-            QueryAtomKind::Postfix => item.ends_with(&self.atom),
-            QueryAtomKind::Exact => item == self.atom,
-        };
-        if self.inverse {
-            res = !res;
-        }
-        res
-    }
-}
-
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
-enum QueryAtomKind {
-    /// Item is a fuzzy match of this behaviour
-    ///
-    /// Usage: `foo`
-    Fuzzy,
-    /// Item contains query atom as a continuous substring
-    ///
-    /// Usage `'foo`
-    Substring,
-    /// Item starts with query atom
-    ///
-    /// Usage: `^foo`
-    Prefix,
-    /// Item ends with query atom
-    ///
-    /// Usage: `foo$`
-    Postfix,
-    /// Item is equal to query atom
-    ///
-    /// Usage `^foo$`
-    Exact,
-}
-
-#[derive(Default)]
-pub struct FuzzyQuery {
-    first_fuzzy_atom: Option<String>,
-    query_atoms: Vec<QueryAtom>,
-}
-
-fn query_atoms(query: &str) -> impl Iterator<Item = &str> + '_ {
-    let mut saw_backslash = false;
-    query.split(move |c| {
-        saw_backslash = match c {
-            ' ' if !saw_backslash => return true,
-            '\\' => true,
-            _ => false,
-        };
-        false
-    })
-}
-
-impl FuzzyQuery {
-    pub fn refine(&self, query: &str, old_query: &str) -> (FuzzyQuery, bool) {
-        // TODO: we could be a lot smarter about this
-        let new_query = Self::new(query);
-        let mut is_refinement = query.starts_with(old_query);
-
-        // if the last atom is an inverse atom adding more text to it
-        // will actually increase the number of matches and we can not refine
-        // the matches.
-        if is_refinement && !self.query_atoms.is_empty() {
-            let last_idx = self.query_atoms.len() - 1;
-            if self.query_atoms[last_idx].inverse
-                && self.query_atoms[last_idx].atom != new_query.query_atoms[last_idx].atom
-            {
-                is_refinement = false;
-            }
-        }
-
-        (new_query, is_refinement)
-    }
-
-    pub fn new(query: &str) -> FuzzyQuery {
-        let mut first_fuzzy_query = None;
-        let query_atoms = query_atoms(query)
-            .filter_map(|atom| {
-                let atom = QueryAtom::new(atom)?;
-                if atom.kind == QueryAtomKind::Fuzzy && first_fuzzy_query.is_none() {
-                    first_fuzzy_query = Some(atom.atom);
-                    None
-                } else {
-                    Some(atom)
-                }
-            })
-            .collect();
-        FuzzyQuery {
-            first_fuzzy_atom: first_fuzzy_query,
-            query_atoms,
-        }
-    }
-
-    pub fn fuzzy_match(&self, item: &str, matcher: &Matcher) -> Option<i64> {
-        // use the rank of the first fuzzzy query for the rank, because merging ranks is not really possible
-        // this behaviour matches fzf and skim
-        let score = self
-            .first_fuzzy_atom
-            .as_ref()
-            .map_or(Some(0), |atom| matcher.fuzzy_match(item, atom))?;
-        if self
-            .query_atoms
-            .iter()
-            .any(|atom| !atom.matches(matcher, item))
-        {
-            return None;
-        }
-        Some(score)
-    }
-
-    pub fn fuzzy_indices(&self, item: &str, matcher: &Matcher) -> Option<(i64, Vec<usize>)> {
-        let (score, mut indices) = self.first_fuzzy_atom.as_ref().map_or_else(
-            || Some((0, Vec::new())),
-            |atom| matcher.fuzzy_indices(item, atom),
-        )?;
-
-        // fast path for the common case of just a single atom
-        if self.query_atoms.is_empty() {
-            return Some((score, indices));
-        }
-
-        for atom in &self.query_atoms {
-            if !atom.indices(matcher, item, &mut indices) {
-                return None;
-            }
-        }
-
-        // deadup and remove duplicate matches
-        indices.sort_unstable();
-        indices.dedup();
-
-        Some((score, indices))
-    }
-}

helix-term/src/ui/fuzzy_match/test.rs

@@ -1,47 +0,0 @@
-use crate::ui::fuzzy_match::FuzzyQuery;
-use crate::ui::fuzzy_match::Matcher;
-
-fn run_test<'a>(query: &str, items: &'a [&'a str]) -> Vec<String> {
-    let query = FuzzyQuery::new(query);
-    let matcher = Matcher::default();
-    items
-        .iter()
-        .filter_map(|item| {
-            let (_, indices) = query.fuzzy_indices(item, &matcher)?;
-            let matched_string = indices
-                .iter()
-                .map(|&pos| item.chars().nth(pos).unwrap())
-                .collect();
-            Some(matched_string)
-        })
-        .collect()
-}
-
-#[test]
-fn match_single_value() {
-    let matches = run_test("foo", &["foobar", "foo", "bar"]);
-    assert_eq!(matches, &["foo", "foo"])
-}
-
-#[test]
-fn match_multiple_values() {
-    let matches = run_test(
-        "foo bar",
-        &["foo bar", "foo   bar", "bar foo", "bar", "foo"],
-    );
-    assert_eq!(matches, &["foobar", "foobar", "barfoo"])
-}
-
-#[test]
-fn space_escape() {
-    let matches = run_test(r"foo\ bar", &["bar foo", "foo bar", "foobar"]);
-    assert_eq!(matches, &["foo bar"])
-}
-
-#[test]
-fn trim() {
-    let matches = run_test(r" foo bar ", &["bar foo", "foo bar", "foobar"]);
-    assert_eq!(matches, &["barfoo", "foobar", "foobar"]);
-    let matches = run_test(r" foo bar\ ", &["bar foo", "foo bar", "foobar"]);
-    assert_eq!(matches, &["bar foo"])
-}

helix-term/src/ui/lsp.rs

@@ -62,7 +62,7 @@ impl Component for SignatureHelp {
         });
 
         let sig_text = crate::ui::markdown::highlighted_code_block(
-            self.signature.clone(),
+            &self.signature,
             &self.language,
             Some(&cx.editor.theme),
             Arc::clone(&self.config_loader),
@@ -109,7 +109,7 @@ impl Component for SignatureHelp {
         let max_text_width = (viewport.0 - PADDING).min(120);
 
         let signature_text = crate::ui::markdown::highlighted_code_block(
-            self.signature.clone(),
+            &self.signature,
             &self.language,
             None,
             Arc::clone(&self.config_loader),

helix-term/src/ui/markdown.rs

@@ -9,15 +9,15 @@ use std::sync::Arc;
 use pulldown_cmark::{CodeBlockKind, Event, HeadingLevel, Options, Parser, Tag};
 
 use helix_core::{
-    syntax::{self, HighlightEvent, Syntax},
-    Rope,
+    syntax::{self, HighlightEvent, InjectionLanguageMarker, Syntax},
+    RopeSlice,
 };
 use helix_view::{
     graphics::{Margin, Rect, Style},
     Theme,
 };
 
-fn styled_multiline_text<'a>(text: String, style: Style) -> Text<'a> {
+fn styled_multiline_text<'a>(text: &str, style: Style) -> Text<'a> {
     let spans: Vec<_> = text
         .lines()
         .map(|line| Span::styled(line.to_string(), style))
@@ -27,7 +27,7 @@ fn styled_multiline_text<'a>(text: String, style: Style) -> Text<'a> {
 }
 
 pub fn highlighted_code_block<'a>(
-    text: String,
+    text: &str,
     language: &str,
     theme: Option<&Theme>,
     config_loader: Arc<syntax::Loader>,
@@ -45,11 +45,13 @@ pub fn highlighted_code_block<'a>(
         None => return styled_multiline_text(text, code_style),
     };
 
-    let rope = Rope::from(text.as_ref());
+    let ropeslice = RopeSlice::from(text);
     let syntax = config_loader
-        .language_configuration_for_injection_string(language)
+        .language_configuration_for_injection_string(&InjectionLanguageMarker::Name(
+            language.into(),
+        ))
         .and_then(|config| config.highlight_config(theme.scopes()))
-        .map(|config| Syntax::new(&rope, config, Arc::clone(&config_loader)));
+        .and_then(|config| Syntax::new(ropeslice, config, Arc::clone(&config_loader)));
 
     let syntax = match syntax {
         Some(s) => s,
@@ -57,7 +59,7 @@ pub fn highlighted_code_block<'a>(
     };
 
     let highlight_iter = syntax
-        .highlight_iter(rope.slice(..), None, None)
+        .highlight_iter(ropeslice, None, None)
         .map(|e| e.unwrap());
     let highlight_iter: Box<dyn Iterator<Item = HighlightEvent>> =
         if let Some(spans) = additional_highlight_spans {
@@ -265,7 +267,7 @@ impl Markdown {
                             CodeBlockKind::Indented => "",
                         };
                         let tui_text = highlighted_code_block(
-                            text.to_string(),
+                            &text,
                             language,
                             theme,
                             Arc::clone(&self.config_loader),

helix-term/src/ui/menu.rs

@@ -1,32 +1,32 @@
-use std::{borrow::Cow, path::PathBuf};
+use std::{borrow::Cow, cmp::Reverse, path::PathBuf};
 
 use crate::{
     compositor::{Callback, Component, Compositor, Context, Event, EventResult},
     ctrl, key, shift,
 };
-use tui::{buffer::Buffer as Surface, text::Span, widgets::Table};
+use helix_core::fuzzy::MATCHER;
+use nucleo::pattern::{Atom, AtomKind, CaseMatching};
+use nucleo::{Config, Utf32Str};
+use tui::{buffer::Buffer as Surface, widgets::Table};
 
 pub use tui::widgets::{Cell, Row};
 
-use fuzzy_matcher::skim::SkimMatcherV2 as Matcher;
-use fuzzy_matcher::FuzzyMatcher;
-
-use helix_view::{graphics::Rect, icons::Icons, Editor};
+use helix_view::{editor::SmartTabConfig, graphics::Rect, Editor};
 use tui::layout::Constraint;
 
-pub trait Item {
+pub trait Item: Sync + Send + 'static {
     /// Additional editor state that is used for label calculation.
-    type Data;
+    type Data: Sync + Send + 'static;
 
-    fn format<'a>(&self, data: &Self::Data, icons: Option<&'a Icons>) -> Row;
+    fn format(&self, data: &Self::Data) -> Row;
 
     fn sort_text(&self, data: &Self::Data) -> Cow<str> {
-        let label: String = self.format(data, None).cell_text().collect();
+        let label: String = self.format(data).cell_text().collect();
         label.into()
     }
 
     fn filter_text(&self, data: &Self::Data) -> Cow<str> {
-        let label: String = self.format(data, None).cell_text().collect();
+        let label: String = self.format(data).cell_text().collect();
         label.into()
     }
 }
@@ -35,15 +35,11 @@ impl Item for PathBuf {
     /// Root prefix to strip.
     type Data = PathBuf;
 
-    fn format<'a>(&self, root_path: &Self::Data, icons: Option<&'a Icons>) -> Row {
-        let path_str = self
-            .strip_prefix(root_path)
+    fn format(&self, root_path: &Self::Data) -> Row {
+        self.strip_prefix(root_path)
             .unwrap_or(self)
-            .to_string_lossy();
-        match icons.and_then(|icons| icons.icon_from_path(Some(self))) {
-            Some(icon) => Row::new([icon.into(), Span::raw(path_str)]),
-            None => path_str.into(),
-        }
+            .to_string_lossy()
+            .into()
     }
 }
 
@@ -55,9 +51,8 @@ pub struct Menu<T: Item> {
 
     cursor: Option<usize>,
 
-    matcher: Box<Matcher>,
     /// (index, score)
-    matches: Vec<(usize, i64)>,
+    matches: Vec<(u32, u32)>,
 
     widths: Vec<Constraint>,
 
@@ -79,11 +74,10 @@ impl<T: Item> Menu<T> {
         editor_data: <T as Item>::Data,
         callback_fn: impl Fn(&mut Editor, Option<&T>, MenuEvent) + 'static,
     ) -> Self {
-        let matches = (0..options.len()).map(|i| (i, 0)).collect();
+        let matches = (0..options.len() as u32).map(|i| (i, 0)).collect();
         Self {
             options,
             editor_data,
-            matcher: Box::new(Matcher::default().ignore_case()),
             matches,
             cursor: None,
             widths: Vec::new(),
@@ -98,20 +92,19 @@ impl<T: Item> Menu<T> {
     pub fn score(&mut self, pattern: &str) {
         // reuse the matches allocation
         self.matches.clear();
-        self.matches.extend(
-            self.options
-                .iter()
-                .enumerate()
-                .filter_map(|(index, option)| {
+        let mut matcher = MATCHER.lock();
+        matcher.config = Config::DEFAULT;
+        let pattern = Atom::new(pattern, CaseMatching::Ignore, AtomKind::Fuzzy, false);
+        let mut buf = Vec::new();
+        let matches = self.options.iter().enumerate().filter_map(|(i, option)| {
             let text = option.filter_text(&self.editor_data);
-                    // TODO: using fuzzy_indices could give us the char idx for match highlighting
-                    self.matcher
-                        .fuzzy_match(&text, pattern)
-                        .map(|score| (index, score))
-                }),
-        );
-        // Order of equal elements needs to be preserved as LSP preselected items come in order of high to low priority
-        self.matches.sort_by_key(|(_, score)| -score);
+            pattern
+                .score(Utf32Str::new(&text, &mut buf), &mut matcher)
+                .map(|score| (i as u32, score as u32))
+        });
+        self.matches.extend(matches);
+        self.matches
+            .sort_unstable_by_key(|&(i, score)| (Reverse(score), i));
 
         // reset cursor position
         self.cursor = None;
@@ -146,10 +139,10 @@ impl<T: Item> Menu<T> {
         let n = self
             .options
             .first()
-            .map(|option| option.format(&self.editor_data, None).cells.len())
+            .map(|option| option.format(&self.editor_data).cells.len())
             .unwrap_or_default();
         let max_lens = self.options.iter().fold(vec![0; n], |mut acc, option| {
-            let row = option.format(&self.editor_data, None);
+            let row = option.format(&self.editor_data);
             // maintain max for each column
             for (acc, cell) in acc.iter_mut().zip(row.cells.iter()) {
                 let width = cell.content.width();
@@ -205,7 +198,7 @@ impl<T: Item> Menu<T> {
         self.cursor.and_then(|cursor| {
             self.matches
                 .get(cursor)
-                .map(|(index, _score)| &self.options[*index])
+                .map(|(index, _score)| &self.options[*index as usize])
         })
     }
 
@@ -213,7 +206,7 @@ impl<T: Item> Menu<T> {
         self.cursor.and_then(|cursor| {
             self.matches
                 .get(cursor)
-                .map(|(index, _score)| &mut self.options[*index])
+                .map(|(index, _score)| &mut self.options[*index as usize])
         })
     }
 
@@ -251,6 +244,21 @@ impl<T: Item + 'static> Component for Menu<T> {
             compositor.pop();
         }));
 
+        // Ignore tab key when supertab is turned on in order not to interfere
+        // with it. (Is there a better way to do this?)
+        if (event == key!(Tab) || event == shift!(Tab))
+            && cx.editor.config().auto_completion
+            && matches!(
+                cx.editor.config().smart_tab,
+                Some(SmartTabConfig {
+                    enable: true,
+                    supersede_menu: true,
+                })
+            )
+        {
+            return EventResult::Ignored(None);
+        }
+
         match event {
             // esc or ctrl-c aborts the completion and closes the menu
             key!(Esc) | ctrl!('c') => {
@@ -321,7 +329,7 @@ impl<T: Item + 'static> Component for Menu<T> {
             .iter()
             .map(|(index, _score)| {
                 // (index, self.options.get(*index).unwrap()) // get_unchecked
-                &self.options[*index] // get_unchecked
+                &self.options[*index as usize] // get_unchecked
             })
             .collect();
 
@@ -335,7 +343,7 @@ impl<T: Item + 'static> Component for Menu<T> {
 
         let rows = options
             .iter()
-            .map(|option| option.format(&self.editor_data, None));
+            .map(|option| option.format(&self.editor_data));
         let table = Table::new(rows)
             .style(style)
             .highlight_style(selected)

helix-term/src/ui/mod.rs

@@ -1,37 +1,31 @@
 mod completion;
 mod document;
 pub(crate) mod editor;
-mod explorer;
-mod fuzzy_match;
 mod info;
 pub mod lsp;
 mod markdown;
 pub mod menu;
 pub mod overlay;
-mod picker;
+pub mod picker;
 pub mod popup;
 mod prompt;
 mod spinner;
 mod statusline;
 mod text;
-mod tree;
 
 use crate::compositor::{Component, Compositor};
 use crate::filter_picker_entry;
 use crate::job::{self, Callback};
-pub use completion::Completion;
+pub use completion::{Completion, CompletionItem};
 pub use editor::EditorView;
-use helix_view::icons::Icons;
 pub use markdown::Markdown;
 pub use menu::Menu;
-pub use picker::{DynamicPicker, FileLocation, FilePicker, Picker};
+pub use picker::{DynamicPicker, FileLocation, Picker};
 pub use popup::Popup;
 pub use prompt::{Prompt, PromptEvent};
 pub use spinner::{ProgressSpinners, Spinner};
 pub use text::Text;
-pub use tree::{TreeOp, TreeView, TreeViewItem};
 
-pub use explorer::Explorer;
 use helix_core::regex::Regex;
 use helix_core::regex::RegexBuilder;
 use helix_view::Editor;
@@ -69,7 +63,7 @@ pub fn regex_prompt(
     prompt: std::borrow::Cow<'static, str>,
     history_register: Option<char>,
     completion_fn: impl FnMut(&Editor, &str) -> Vec<prompt::Completion> + 'static,
-    fun: impl Fn(&mut Editor, Regex, PromptEvent) + 'static,
+    fun: impl Fn(&mut crate::compositor::Context, Regex, PromptEvent) + 'static,
 ) {
     let (view, doc) = current!(cx.editor);
     let doc_id = view.doc;
@@ -116,7 +110,7 @@ pub fn regex_prompt(
                                 view.jumps.push((doc_id, snapshot.clone()));
                             }
 
-                            fun(cx.editor, regex, event);
+                            fun(cx, regex, event);
 
                             let (view, doc) = current!(cx.editor);
                             view.ensure_cursor_in_view(doc, config.scrolloff);
@@ -147,27 +141,21 @@ pub fn regex_prompt(
                                 };
 
                                 cx.jobs.callback(callback);
-                            } else {
-                                // Update
-                                // TODO: mark command line as error
                             }
                         }
                     }
                 }
             }
         },
-    );
+    )
+    .with_language("regex", std::sync::Arc::clone(&cx.editor.syn_loader));
     // Calculate initial completion
     prompt.recalculate_completion(cx.editor);
     // prompt
     cx.push_layer(Box::new(prompt));
 }
 
-pub fn file_picker(
-    root: PathBuf,
-    config: &helix_view::editor::Config,
-    icons: &Icons,
-) -> FilePicker<PathBuf> {
+pub fn file_picker(root: PathBuf, config: &helix_view::editor::Config) -> Picker<PathBuf> {
     use ignore::{types::TypesBuilder, WalkBuilder};
     use std::time::Instant;
 
@@ -185,6 +173,7 @@ pub fn file_picker(
         .git_ignore(config.file_picker.git_ignore)
         .git_global(config.file_picker.git_global)
         .git_exclude(config.file_picker.git_exclude)
+        .sort_by_file_name(|name1, name2| name1.cmp(name2))
         .max_depth(config.file_picker.max_depth)
         .filter_entry(move |entry| filter_picker_entry(entry, &absolute_root, dedup_symlinks));
 
@@ -201,36 +190,16 @@ pub fn file_picker(
         .build()
         .expect("failed to build excluded_types");
     walk_builder.types(excluded_types);
-
-    // We want files along with their modification date for sorting
-    let files = walk_builder.build().filter_map(|entry| {
+    let mut files = walk_builder.build().filter_map(|entry| {
         let entry = entry.ok()?;
-        // This is faster than entry.path().is_dir() since it uses cached fs::Metadata fetched by ignore/walkdir
-        if entry.file_type()?.is_file() {
-            Some(entry.into_path())
-        } else {
-            None
+        if !entry.file_type()?.is_file() {
+            return None;
         }
+        Some(entry.into_path())
     });
-
-    // Cap the number of files if we aren't in a git project, preventing
-    // hangs when using the picker in your home directory
-    let mut files: Vec<PathBuf> = if root.join(".git").exists() {
-        files.collect()
-    } else {
-        // const MAX: usize = 8192;
-        const MAX: usize = 100_000;
-        files.take(MAX).collect()
-    };
-    files.sort();
-
     log::debug!("file_picker init {:?}", Instant::now().duration_since(now));
 
-    FilePicker::new(
-        files,
-        root,
-        config.icons.picker.then_some(icons),
-        move |cx, path: &PathBuf, action| {
+    let picker = Picker::new(Vec::new(), root, move |cx, path: &PathBuf, action| {
         if let Err(e) = cx.editor.open(path, action) {
             let err = if let Some(err) = e.source() {
                 format!("{}", err)
@@ -239,21 +208,42 @@ pub fn file_picker(
             };
             cx.editor.set_error(err);
         }
-        },
-        |_editor, path| Some((path.clone().into(), None)),
-    )
+    })
+    .with_preview(|_editor, path| Some((path.clone().into(), None)));
+    let injector = picker.injector();
+    let timeout = std::time::Instant::now() + std::time::Duration::from_millis(30);
+
+    let mut hit_timeout = false;
+    for file in &mut files {
+        if injector.push(file).is_err() {
+            break;
+        }
+        if std::time::Instant::now() >= timeout {
+            hit_timeout = true;
+            break;
+        }
+    }
+    if hit_timeout {
+        std::thread::spawn(move || {
+            for file in files {
+                if injector.push(file).is_err() {
+                    break;
+                }
+            }
+        });
+    }
+    picker
 }
 
 pub mod completers {
     use crate::ui::prompt::Completion;
-    use fuzzy_matcher::skim::SkimMatcherV2 as Matcher;
-    use fuzzy_matcher::FuzzyMatcher;
+    use helix_core::fuzzy::fuzzy_match;
+    use helix_core::syntax::LanguageServerFeature;
     use helix_view::document::SCRATCH_BUFFER_NAME;
-
+    use helix_view::theme;
     use helix_view::{editor::Config, Editor};
     use once_cell::sync::Lazy;
     use std::borrow::Cow;
-    use std::cmp::Reverse;
 
     pub type Completer = fn(&Editor, &str) -> Vec<Completion>;
 
@@ -262,94 +252,32 @@ pub mod completers {
     }
 
     pub fn buffer(editor: &Editor, input: &str) -> Vec<Completion> {
-        let mut names: Vec<_> = editor
-            .documents
-            .values()
-            .map(|doc| {
-                let name = doc
-                    .relative_path()
-                    .map(|p| p.display().to_string())
-                    .unwrap_or_else(|| String::from(SCRATCH_BUFFER_NAME));
-                ((0..), Cow::from(name))
-            })
-            .collect();
-
-        let matcher = Matcher::default();
+        let names = editor.documents.values().map(|doc| {
+            doc.relative_path()
+                .map(|p| p.display().to_string().into())
+                .unwrap_or_else(|| Cow::from(SCRATCH_BUFFER_NAME))
+        });
 
-        let mut matches: Vec<_> = names
+        fuzzy_match(input, names, true)
             .into_iter()
-            .filter_map(|(_range, name)| {
-                matcher.fuzzy_match(&name, input).map(|score| (name, score))
-            })
-            .collect();
-
-        matches.sort_unstable_by_key(|(_file, score)| Reverse(*score));
-        names = matches.into_iter().map(|(name, _)| ((0..), name)).collect();
-
-        names
+            .map(|(name, _)| ((0..), name))
+            .collect()
     }
 
     pub fn theme(_editor: &Editor, input: &str) -> Vec<Completion> {
-        let mut names = helix_loader::read_toml_names(&helix_loader::config_dir().join("themes"));
+        let mut names = theme::Loader::read_names(&helix_loader::config_dir().join("themes"));
         for rt_dir in helix_loader::runtime_dirs() {
-            names.extend(helix_loader::read_toml_names(&rt_dir.join("themes")));
+            names.extend(theme::Loader::read_names(&rt_dir.join("themes")));
         }
         names.push("default".into());
         names.push("base16_default".into());
         names.sort();
         names.dedup();
 
-        let mut names: Vec<_> = names
-            .into_iter()
-            .map(|name| ((0..), Cow::from(name)))
-            .collect();
-
-        let matcher = Matcher::default();
-
-        let mut matches: Vec<_> = names
-            .into_iter()
-            .filter_map(|(_range, name)| {
-                matcher.fuzzy_match(&name, input).map(|score| (name, score))
-            })
-            .collect();
-
-        matches.sort_unstable_by(|(name1, score1), (name2, score2)| {
-            (Reverse(*score1), name1).cmp(&(Reverse(*score2), name2))
-        });
-        names = matches.into_iter().map(|(name, _)| ((0..), name)).collect();
-
-        names
-    }
-
-    pub fn icons(_editor: &Editor, input: &str) -> Vec<Completion> {
-        let mut names = helix_loader::read_toml_names(&helix_loader::config_dir().join("icons"));
-        for rt_dir in helix_loader::runtime_dirs() {
-            names.extend(helix_loader::read_toml_names(&rt_dir.join("icons")));
-        }
-        names.push("default".into());
-        names.sort();
-        names.dedup();
-
-        let mut names: Vec<_> = names
-            .into_iter()
-            .map(|name| ((0..), Cow::from(name)))
-            .collect();
-
-        let matcher = Matcher::default();
-
-        let mut matches: Vec<_> = names
+        fuzzy_match(input, names, false)
             .into_iter()
-            .filter_map(|(_range, name)| {
-                matcher.fuzzy_match(&name, input).map(|score| (name, score))
-            })
-            .collect();
-
-        matches.sort_unstable_by(|(name1, score1), (name2, score2)| {
-            (Reverse(*score1), name1).cmp(&(Reverse(*score2), name2))
-        });
-        names = matches.into_iter().map(|(name, _)| ((0..), name)).collect();
-
-        names
+            .map(|(name, _)| ((0..), name.into()))
+            .collect()
     }
 
     /// Recursive function to get all keys from this value and add them to vec
@@ -376,22 +304,22 @@ pub mod completers {
             keys
         });
 
-        let matcher = Matcher::default();
-
-        let mut matches: Vec<_> = KEYS
-            .iter()
-            .filter_map(|name| matcher.fuzzy_match(name, input).map(|score| (name, score)))
-            .collect();
-
-        matches.sort_unstable_by_key(|(_file, score)| Reverse(*score));
-        matches
+        fuzzy_match(input, &*KEYS, false)
             .into_iter()
             .map(|(name, _)| ((0..), name.into()))
             .collect()
     }
 
     pub fn filename(editor: &Editor, input: &str) -> Vec<Completion> {
-        filename_impl(editor, input, |entry| {
+        filename_with_git_ignore(editor, input, true)
+    }
+
+    pub fn filename_with_git_ignore(
+        editor: &Editor,
+        input: &str,
+        git_ignore: bool,
+    ) -> Vec<Completion> {
+        filename_impl(editor, input, git_ignore, |entry| {
             let is_dir = entry.file_type().map_or(false, |entry| entry.is_dir());
 
             if is_dir {
@@ -403,8 +331,6 @@ pub mod completers {
     }
 
     pub fn language(editor: &Editor, input: &str) -> Vec<Completion> {
-        let matcher = Matcher::default();
-
         let text: String = "text".into();
 
         let language_ids = editor
@@ -413,65 +339,36 @@ pub mod completers {
             .map(|config| &config.language_id)
             .chain(std::iter::once(&text));
 
-        let mut matches: Vec<_> = language_ids
-            .filter_map(|language_id| {
-                matcher
-                    .fuzzy_match(language_id, input)
-                    .map(|score| (language_id, score))
-            })
-            .collect();
-
-        matches.sort_unstable_by(|(language1, score1), (language2, score2)| {
-            (Reverse(*score1), language1).cmp(&(Reverse(*score2), language2))
-        });
-
-        matches
+        fuzzy_match(input, language_ids, false)
             .into_iter()
-            .map(|(language, _score)| ((0..), language.clone().into()))
+            .map(|(name, _)| ((0..), name.to_owned().into()))
             .collect()
     }
 
     pub fn lsp_workspace_command(editor: &Editor, input: &str) -> Vec<Completion> {
-        let matcher = Matcher::default();
-
-        let (_, doc) = current_ref!(editor);
-
-        let language_server = match doc.language_server() {
-            Some(language_server) => language_server,
-            None => {
+        let Some(options) = doc!(editor)
+            .language_servers_with_feature(LanguageServerFeature::WorkspaceCommand)
+            .find_map(|ls| ls.capabilities().execute_command_provider.as_ref())
+        else {
             return vec![];
-            }
-        };
-
-        let options = match &language_server.capabilities().execute_command_provider {
-            Some(options) => options,
-            None => {
-                return vec![];
-            }
         };
 
-        let mut matches: Vec<_> = options
-            .commands
-            .iter()
-            .filter_map(|command| {
-                matcher
-                    .fuzzy_match(command, input)
-                    .map(|score| (command, score))
-            })
-            .collect();
-
-        matches.sort_unstable_by(|(command1, score1), (command2, score2)| {
-            (Reverse(*score1), command1).cmp(&(Reverse(*score2), command2))
-        });
-
-        matches
+        fuzzy_match(input, &options.commands, false)
             .into_iter()
-            .map(|(command, _score)| ((0..), command.clone().into()))
+            .map(|(name, _)| ((0..), name.to_owned().into()))
             .collect()
     }
 
     pub fn directory(editor: &Editor, input: &str) -> Vec<Completion> {
-        filename_impl(editor, input, |entry| {
+        directory_with_git_ignore(editor, input, true)
+    }
+
+    pub fn directory_with_git_ignore(
+        editor: &Editor,
+        input: &str,
+        git_ignore: bool,
+    ) -> Vec<Completion> {
+        filename_impl(editor, input, git_ignore, |entry| {
             let is_dir = entry.file_type().map_or(false, |entry| entry.is_dir());
 
             if is_dir {
@@ -494,7 +391,12 @@ pub mod completers {
     }
 
     // TODO: we could return an iter/lazy thing so it can fetch as many as it needs.
-    fn filename_impl<F>(_editor: &Editor, input: &str, filter_fn: F) -> Vec<Completion>
+    fn filename_impl<F>(
+        _editor: &Editor,
+        input: &str,
+        git_ignore: bool,
+        filter_fn: F,
+    ) -> Vec<Completion>
     where
         F: Fn(&ignore::DirEntry) -> FileMatch,
     {
@@ -525,7 +427,7 @@ pub mod completers {
                 match path.parent() {
                     Some(path) if !path.as_os_str().is_empty() => path.to_path_buf(),
                     // Path::new("h")'s parent is Some("")...
-                    _ => std::env::current_dir().expect("couldn't determine current directory"),
+                    _ => helix_loader::current_working_dir(),
                 }
             };
 
@@ -534,9 +436,10 @@ pub mod completers {
 
         let end = input.len()..;
 
-        let mut files: Vec<_> = WalkBuilder::new(&dir)
+        let files = WalkBuilder::new(&dir)
             .hidden(false)
             .follow_links(false) // We're scanning over depth 1
+            .git_ignore(git_ignore)
             .max_depth(Some(1))
             .build()
             .filter_map(|file| {
@@ -565,43 +468,25 @@ pub mod completers {
                         path.push("");
                     }
 
-                    let path = path.to_str()?.to_owned();
-                    Some((end.clone(), Cow::from(path)))
+                    let path = path.into_os_string().into_string().ok()?;
+                    Some(Cow::from(path))
                 })
             }) // TODO: unwrap or skip
-            .filter(|(_, path)| !path.is_empty()) // TODO
-            .collect();
+            .filter(|path| !path.is_empty());
 
         // if empty, return a list of dirs and files in current dir
         if let Some(file_name) = file_name {
-            let matcher = Matcher::default();
-
-            // inefficient, but we need to calculate the scores, filter out None, then sort.
-            let mut matches: Vec<_> = files
-                .into_iter()
-                .filter_map(|(_range, file)| {
-                    matcher
-                        .fuzzy_match(&file, &file_name)
-                        .map(|score| (file, score))
-                })
-                .collect();
-
             let range = (input.len().saturating_sub(file_name.len()))..;
-
-            matches.sort_unstable_by(|(file1, score1), (file2, score2)| {
-                (Reverse(*score1), file1).cmp(&(Reverse(*score2), file2))
-            });
-
-            files = matches
+            fuzzy_match(&file_name, files, true)
                 .into_iter()
-                .map(|(file, _)| (range.clone(), file))
-                .collect();
+                .map(|(name, _)| (range.clone(), name))
+                .collect()
 
             // TODO: complete to longest common match
         } else {
+            let mut files: Vec<_> = files.map(|file| (end.clone(), file)).collect();
             files.sort_unstable_by(|(_, path1), (_, path2)| path1.cmp(path2));
-        }
-
             files
         }
     }
+}

helix-term/src/ui/overlay.rs

@@ -19,7 +19,26 @@ pub struct Overlay<T> {
 pub fn overlaid<T>(content: T) -> Overlay<T> {
     Overlay {
         content,
-        calc_child_size: Box::new(|rect: Rect| rect.overlayed()),
+        calc_child_size: Box::new(|rect: Rect| clip_rect_relative(rect.clip_bottom(2), 90, 90)),
+    }
+}
+
+fn clip_rect_relative(rect: Rect, percent_horizontal: u8, percent_vertical: u8) -> Rect {
+    fn mul_and_cast(size: u16, factor: u8) -> u16 {
+        ((size as u32) * (factor as u32) / 100).try_into().unwrap()
+    }
+
+    let inner_w = mul_and_cast(rect.width, percent_horizontal);
+    let inner_h = mul_and_cast(rect.height, percent_vertical);
+
+    let offset_x = rect.width.saturating_sub(inner_w) / 2;
+    let offset_y = rect.height.saturating_sub(inner_h) / 2;
+
+    Rect {
+        x: rect.x + offset_x,
+        y: rect.y + offset_y,
+        width: inner_w,
+        height: inner_h,
     }
 }