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master/.nojekyll
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This file makes sure that Github Pages doesn't process mdBook's output.

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<!DOCTYPE HTML>
<html lang="en" class="sidebar-visible no-js colibri">
<head>
<!-- Book generated using mdBook -->
<meta charset="UTF-8">
<title>Page not found</title>
<base href="/">
<!-- Custom HTML head -->
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="theme-color" content="#ffffff" />
<link rel="icon" href="favicon.svg">
<link rel="shortcut icon" href="favicon.png">
<link rel="stylesheet" href="css/variables.css">
<link rel="stylesheet" href="css/general.css">
<link rel="stylesheet" href="css/chrome.css">
<link rel="stylesheet" href="css/print.css" media="print">
<!-- Fonts -->
<link rel="stylesheet" href="FontAwesome/css/font-awesome.css">
<link rel="preconnect" href="https://fonts.gstatic.com">
<link href="https://fonts.googleapis.com/css2?family=Inter:wght@200;400;500;700&display=swap" rel="stylesheet">
<link rel="stylesheet" href="fonts/fonts.css">
<!-- Highlight.js Stylesheets -->
<link rel="stylesheet" href="highlight.css">
<link rel="stylesheet" href="tomorrow-night.css">
<link rel="stylesheet" href="ayu-highlight.css">
<!-- Custom theme stylesheets -->
</head>
<body>
<!-- Provide site root to javascript -->
<script type="text/javascript">
var path_to_root = "";
var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "colibri" : "colibri";
</script>
<!-- Work around some values being stored in localStorage wrapped in quotes -->
<script type="text/javascript">
try {
var theme = localStorage.getItem('mdbook-theme');
var sidebar = localStorage.getItem('mdbook-sidebar');
if (theme.startsWith('"') && theme.endsWith('"')) {
localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
}
if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
}
} catch (e) { }
</script>
<!-- Set the theme before any content is loaded, prevents flash -->
<script type="text/javascript">
var theme;
try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
if (theme === null || theme === undefined) { theme = default_theme; }
var html = document.querySelector('html');
html.classList.remove('no-js')
html.classList.remove('colibri')
html.classList.add(theme);
html.classList.add('js');
</script>
<!-- Hide / unhide sidebar before it is displayed -->
<script type="text/javascript">
var html = document.querySelector('html');
var sidebar = 'hidden';
if (document.body.clientWidth >= 1080) {
try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
sidebar = sidebar || 'visible';
}
html.classList.remove('sidebar-visible');
html.classList.add("sidebar-" + sidebar);
</script>
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
<div class="sidebar-scrollbox">
<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
</div>
<div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
</nav>
<div id="page-wrapper" class="page-wrapper">
<div class="page">
<div id="menu-bar-hover-placeholder"></div>
<div id="menu-bar" class="menu-bar sticky bordered">
<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>
</button>
<button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
<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">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 (default)</button></li>
</ul>
<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">
<i class="fa fa-search"></i>
</button>
</div>
<h1 class="menu-title"></h1>
<div class="right-buttons">
<a href="print.html" title="Print this book" aria-label="Print this book">
<i id="print-button" class="fa fa-print"></i>
</a>
<a href="https://github.com/helix-editor/helix" title="Git repository" aria-label="Git repository">
<i id="git-repository-button" class="fa fa-github"></i>
</a>
</div>
</div>
<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">
</form>
<div id="searchresults-outer" class="searchresults-outer hidden">
<div id="searchresults-header" class="searchresults-header"></div>
<ul id="searchresults">
</ul>
</div>
</div>
<!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
<script type="text/javascript">
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) {
link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
});
</script>
<div id="content" class="content">
<main>
<h1 id="document-not-found-404"><a class="header" href="#document-not-found-404">Document not found (404)</a></h1>
<p>This URL is invalid, sorry. Please use the navigation bar or search to continue.</p>
</main>
<nav class="nav-wrapper" aria-label="Page navigation">
<!-- Mobile navigation buttons -->
<div style="clear: both"></div>
</nav>
</div>
</div>
<nav class="nav-wide-wrapper" aria-label="Page navigation">
</nav>
</div>
<script type="text/javascript">
window.playground_copyable = true;
</script>
<script src="elasticlunr.min.js" type="text/javascript" charset="utf-8"></script>
<script src="mark.min.js" type="text/javascript" charset="utf-8"></script>
<script src="searcher.js" type="text/javascript" charset="utf-8"></script>
<script src="clipboard.min.js" type="text/javascript" charset="utf-8"></script>
<script src="highlight.js" type="text/javascript" charset="utf-8"></script>
<script src="book.js" type="text/javascript" charset="utf-8"></script>
<!-- Custom JS scripts -->
</body>
</html>

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master/CNAME
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docs.helix-editor.com

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master/ayu-highlight.css
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/*
Based off of the Ayu theme
Original by Dempfi (https://github.com/dempfi/ayu)
*/
.hljs {
display: block;
overflow-x: auto;
background: #191f26;
color: #e6e1cf;
}
.hljs-comment,
.hljs-quote {
color: #5c6773;
font-style: italic;
}
.hljs-variable,
.hljs-template-variable,
.hljs-attribute,
.hljs-attr,
.hljs-regexp,
.hljs-link,
.hljs-selector-id,
.hljs-selector-class {
color: #ff7733;
}
.hljs-number,
.hljs-meta,
.hljs-builtin-name,
.hljs-literal,
.hljs-type,
.hljs-params {
color: #ffee99;
}
.hljs-string,
.hljs-bullet {
color: #b8cc52;
}
.hljs-title,
.hljs-built_in,
.hljs-section {
color: #ffb454;
}
.hljs-keyword,
.hljs-selector-tag,
.hljs-symbol {
color: #ff7733;
}
.hljs-name {
color: #36a3d9;
}
.hljs-tag {
color: #00568d;
}
.hljs-emphasis {
font-style: italic;
}
.hljs-strong {
font-weight: bold;
}
.hljs-addition {
color: #91b362;
}
.hljs-deletion {
color: #d96c75;
}

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"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)) {
snippet_crates.push(item[1]);
}
// check if all used crates are available on play.rust-lang.org
var all_available = snippet_crates.every(function (elem) {
return playground_crates.indexOf(elem) > -1;
});
if (all_available) {
play_button.classList.remove("hidden");
} else {
play_button.classList.add("hidden");
}
}
function run_rust_code(code_block) {
var result_block = code_block.querySelector(".result");
if (!result_block) {
result_block = document.createElement('code');
result_block.className = 'result hljs language-bash';
code_block.append(result_block);
}
let text = playground_text(code_block);
let classes = code_block.querySelector('code').classList;
let has_2018 = classes.contains("edition2018");
let edition = has_2018 ? "2018" : "2015";
var params = {
version: "stable",
optimize: "0",
code: text,
edition: edition
};
if (text.indexOf("#![feature") !== -1) {
params.version = "nightly";
}
result_block.innerText = "Running...";
fetch_with_timeout("https://play.rust-lang.org/evaluate.json", {
headers: {
'Content-Type': "application/json",
},
method: 'POST',
mode: 'cors',
body: JSON.stringify(params)
})
.then(response => response.json())
.then(response => result_block.innerText = response.result)
.catch(error => result_block.innerText = "Playground Communication: " + error.message);
}
// Syntax highlighting Configuration
hljs.configure({
tabReplace: ' ', // 4 spaces
languages: [], // Languages used for auto-detection
});
let code_nodes = Array
.from(document.querySelectorAll('code'))
// Don't highlight `inline code` blocks in headers.
.filter(function (node) {return !node.parentElement.classList.contains("header"); });
if (window.ace) {
// language-rust class needs to be removed for editable
// blocks or highlightjs will capture events
Array
.from(document.querySelectorAll('code.editable'))
.forEach(function (block) { block.classList.remove('language-rust'); });
Array
.from(document.querySelectorAll('code:not(.editable)'))
.forEach(function (block) { hljs.highlightBlock(block); });
} else {
code_nodes.forEach(function (block) { hljs.highlightBlock(block); });
}
// Adding the hljs class gives code blocks the color css
// even if highlighting doesn't apply
code_nodes.forEach(function (block) { block.classList.add('hljs'); });
Array.from(document.querySelectorAll("code.language-rust")).forEach(function (block) {
var lines = Array.from(block.querySelectorAll('.boring'));
// If no lines were hidden, return
if (!lines.length) { return; }
block.classList.add("hide-boring");
var buttons = document.createElement('div');
buttons.className = 'buttons';
buttons.innerHTML = "<button class=\"fa fa-eye\" title=\"Show hidden lines\" aria-label=\"Show hidden lines\"></button>";
// add expand button
var pre_block = block.parentNode;
pre_block.insertBefore(buttons, pre_block.firstChild);
pre_block.querySelector('.buttons').addEventListener('click', function (e) {
if (e.target.classList.contains('fa-eye')) {
e.target.classList.remove('fa-eye');
e.target.classList.add('fa-eye-slash');
e.target.title = 'Hide lines';
e.target.setAttribute('aria-label', e.target.title);
block.classList.remove('hide-boring');
} else if (e.target.classList.contains('fa-eye-slash')) {
e.target.classList.remove('fa-eye-slash');
e.target.classList.add('fa-eye');
e.target.title = 'Show hidden lines';
e.target.setAttribute('aria-label', e.target.title);
block.classList.add('hide-boring');
}
});
});
if (window.playground_copyable) {
Array.from(document.querySelectorAll('pre code')).forEach(function (block) {
var pre_block = block.parentNode;
if (!pre_block.classList.contains('playground')) {
var buttons = pre_block.querySelector(".buttons");
if (!buttons) {
buttons = document.createElement('div');
buttons.className = 'buttons';
pre_block.insertBefore(buttons, pre_block.firstChild);
}
var clipButton = document.createElement('button');
clipButton.className = 'fa fa-copy clip-button';
clipButton.title = 'Copy to clipboard';
clipButton.setAttribute('aria-label', clipButton.title);
clipButton.innerHTML = '<i class=\"tooltiptext\"></i>';
buttons.insertBefore(clipButton, buttons.firstChild);
}
});
}
// Process playground code blocks
Array.from(document.querySelectorAll(".playground")).forEach(function (pre_block) {
// Add play button
var buttons = pre_block.querySelector(".buttons");
if (!buttons) {
buttons = document.createElement('div');
buttons.className = 'buttons';
pre_block.insertBefore(buttons, pre_block.firstChild);
}
var runCodeButton = document.createElement('button');
runCodeButton.className = 'fa fa-play play-button';
runCodeButton.hidden = true;
runCodeButton.title = 'Run this code';
runCodeButton.setAttribute('aria-label', runCodeButton.title);
buttons.insertBefore(runCodeButton, buttons.firstChild);
runCodeButton.addEventListener('click', function (e) {
run_rust_code(pre_block);
});
if (window.playground_copyable) {
var copyCodeClipboardButton = document.createElement('button');
copyCodeClipboardButton.className = 'fa fa-copy clip-button';
copyCodeClipboardButton.innerHTML = '<i class="tooltiptext"></i>';
copyCodeClipboardButton.title = 'Copy to clipboard';
copyCodeClipboardButton.setAttribute('aria-label', copyCodeClipboardButton.title);
buttons.insertBefore(copyCodeClipboardButton, buttons.firstChild);
}
let code_block = pre_block.querySelector("code");
if (window.ace && code_block.classList.contains("editable")) {
var undoChangesButton = document.createElement('button');
undoChangesButton.className = 'fa fa-history reset-button';
undoChangesButton.title = 'Undo changes';
undoChangesButton.setAttribute('aria-label', undoChangesButton.title);
buttons.insertBefore(undoChangesButton, buttons.firstChild);
undoChangesButton.addEventListener('click', function () {
let editor = window.ace.edit(code_block);
editor.setValue(editor.originalCode);
editor.clearSelection();
});
}
});
})();
(function themes() {
var html = document.querySelector('html');
var themeToggleButton = document.getElementById('theme-toggle');
var themePopup = document.getElementById('theme-list');
var themeColorMetaTag = document.querySelector('meta[name="theme-color"]');
var stylesheets = {
ayuHighlight: document.querySelector("[href$='ayu-highlight.css']"),
tomorrowNight: document.querySelector("[href$='tomorrow-night.css']"),
highlight: document.querySelector("[href$='highlight.css']"),
};
function showThemes() {
themePopup.style.display = 'block';
themeToggleButton.setAttribute('aria-expanded', true);
themePopup.querySelector("button#" + get_theme()).focus();
}
function hideThemes() {
themePopup.style.display = 'none';
themeToggleButton.setAttribute('aria-expanded', false);
themeToggleButton.focus();
}
function get_theme() {
var theme;
try { theme = localStorage.getItem('mdbook-theme'); } catch (e) { }
if (theme === null || theme === undefined) {
return default_theme;
} else {
return theme;
}
}
function set_theme(theme, store = true) {
let ace_theme;
if (theme == 'coal' || theme == 'navy') {
stylesheets.ayuHighlight.disabled = true;
stylesheets.tomorrowNight.disabled = false;
stylesheets.highlight.disabled = true;
ace_theme = "ace/theme/tomorrow_night";
} else if (theme == 'ayu') {
stylesheets.ayuHighlight.disabled = false;
stylesheets.tomorrowNight.disabled = true;
stylesheets.highlight.disabled = true;
ace_theme = "ace/theme/tomorrow_night";
} else {
stylesheets.ayuHighlight.disabled = true;
stylesheets.tomorrowNight.disabled = true;
stylesheets.highlight.disabled = false;
ace_theme = "ace/theme/dawn";
}
setTimeout(function () {
themeColorMetaTag.content = getComputedStyle(document.body).backgroundColor;
}, 1);
if (window.ace && window.editors) {
window.editors.forEach(function (editor) {
editor.setTheme(ace_theme);
});
}
var previousTheme = get_theme();
if (store) {
try { localStorage.setItem('mdbook-theme', theme); } catch (e) { }
}
html.classList.remove(previousTheme);
html.classList.add(theme);
}
// Set theme
var theme = get_theme();
set_theme(theme, false);
themeToggleButton.addEventListener('click', function () {
if (themePopup.style.display === 'block') {
hideThemes();
} else {
showThemes();
}
});
themePopup.addEventListener('click', function (e) {
var theme = e.target.id || e.target.parentElement.id;
set_theme(theme);
});
themePopup.addEventListener('focusout', function(e) {
// e.relatedTarget is null in Safari and Firefox on macOS (see workaround below)
if (!!e.relatedTarget && !themeToggleButton.contains(e.relatedTarget) && !themePopup.contains(e.relatedTarget)) {
hideThemes();
}
});
// Should not be needed, but it works around an issue on macOS & iOS: https://github.com/rust-lang/mdBook/issues/628
document.addEventListener('click', function(e) {
if (themePopup.style.display === 'block' && !themeToggleButton.contains(e.target) && !themePopup.contains(e.target)) {
hideThemes();
}
});
document.addEventListener('keydown', function (e) {
if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) { return; }
if (!themePopup.contains(e.target)) { return; }
switch (e.key) {
case 'Escape':
e.preventDefault();
hideThemes();
break;
case 'ArrowUp':
e.preventDefault();
var li = document.activeElement.parentElement;
if (li && li.previousElementSibling) {
li.previousElementSibling.querySelector('button').focus();
}
break;
case 'ArrowDown':
e.preventDefault();
var li = document.activeElement.parentElement;
if (li && li.nextElementSibling) {
li.nextElementSibling.querySelector('button').focus();
}
break;
case 'Home':
e.preventDefault();
themePopup.querySelector('li:first-child button').focus();
break;
case 'End':
e.preventDefault();
themePopup.querySelector('li:last-child button').focus();
break;
}
});
})();
(function sidebar() {
var html = document.querySelector("html");
var sidebar = document.getElementById("sidebar");
var sidebarLinks = document.querySelectorAll('#sidebar a');
var sidebarToggleButton = document.getElementById("sidebar-toggle");
var sidebarResizeHandle = document.getElementById("sidebar-resize-handle");
var firstContact = null;
function showSidebar() {
html.classList.remove('sidebar-hidden')
html.classList.add('sidebar-visible');
Array.from(sidebarLinks).forEach(function (link) {
link.setAttribute('tabIndex', 0);
});
sidebarToggleButton.setAttribute('aria-expanded', true);
sidebar.setAttribute('aria-hidden', false);
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html" class="active"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="commands"><a class="header" href="#commands">Commands</a></h1>
<p>Command mode can be activated by pressing <code>:</code>. The built-in commands are:</p>
<div class="table-wrapper"><table><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody>
<tr><td><code>:quit</code>, <code>:q</code></td><td>Close the current view.</td></tr>
<tr><td><code>:quit!</code>, <code>:q!</code></td><td>Force close the current view, ignoring unsaved changes.</td></tr>
<tr><td><code>:open</code>, <code>:o</code></td><td>Open a file from disk into the current view.</td></tr>
<tr><td><code>:buffer-close</code>, <code>:bc</code>, <code>:bclose</code></td><td>Close the current buffer.</td></tr>
<tr><td><code>:buffer-close!</code>, <code>:bc!</code>, <code>:bclose!</code></td><td>Close the current buffer forcefully, ignoring unsaved changes.</td></tr>
<tr><td><code>:buffer-close-others</code>, <code>:bco</code>, <code>:bcloseother</code></td><td>Close all buffers but the currently focused one.</td></tr>
<tr><td><code>:buffer-close-others!</code>, <code>:bco!</code>, <code>:bcloseother!</code></td><td>Force close all buffers but the currently focused one.</td></tr>
<tr><td><code>:buffer-close-all</code>, <code>:bca</code>, <code>:bcloseall</code></td><td>Close all buffers without quitting.</td></tr>
<tr><td><code>:buffer-close-all!</code>, <code>:bca!</code>, <code>:bcloseall!</code></td><td>Force close all buffers ignoring unsaved changes without quitting.</td></tr>
<tr><td><code>:buffer-next</code>, <code>:bn</code>, <code>:bnext</code></td><td>Goto next buffer.</td></tr>
<tr><td><code>:buffer-previous</code>, <code>:bp</code>, <code>:bprev</code></td><td>Goto previous buffer.</td></tr>
<tr><td><code>:write</code>, <code>:w</code></td><td>Write changes to disk. Accepts an optional path (:write some/path.txt)</td></tr>
<tr><td><code>:write!</code>, <code>:w!</code></td><td>Force write changes to disk creating necessary subdirectories. Accepts an optional path (:write! some/path.txt)</td></tr>
<tr><td><code>:write-buffer-close</code>, <code>:wbc</code></td><td>Write changes to disk and closes the buffer. Accepts an optional path (:write-buffer-close some/path.txt)</td></tr>
<tr><td><code>:write-buffer-close!</code>, <code>:wbc!</code></td><td>Force write changes to disk creating necessary subdirectories and closes the buffer. Accepts an optional path (:write-buffer-close! some/path.txt)</td></tr>
<tr><td><code>:new</code>, <code>:n</code></td><td>Create a new scratch buffer.</td></tr>
<tr><td><code>:format</code>, <code>:fmt</code></td><td>Format the file using the LSP formatter.</td></tr>
<tr><td><code>:indent-style</code></td><td>Set the indentation style for editing. ('t' for tabs or 1-8 for number of spaces.)</td></tr>
<tr><td><code>:line-ending</code></td><td>Set the document's default line ending. Options: crlf, lf.</td></tr>
<tr><td><code>:earlier</code>, <code>:ear</code></td><td>Jump back to an earlier point in edit history. Accepts a number of steps or a time span.</td></tr>
<tr><td><code>:later</code>, <code>:lat</code></td><td>Jump to a later point in edit history. Accepts a number of steps or a time span.</td></tr>
<tr><td><code>:write-quit</code>, <code>:wq</code>, <code>:x</code></td><td>Write changes to disk and close the current view. Accepts an optional path (:wq some/path.txt)</td></tr>
<tr><td><code>:write-quit!</code>, <code>:wq!</code>, <code>:x!</code></td><td>Write changes to disk and close the current view forcefully. Accepts an optional path (:wq! some/path.txt)</td></tr>
<tr><td><code>:write-all</code>, <code>:wa</code></td><td>Write changes from all buffers to disk.</td></tr>
<tr><td><code>:write-quit-all</code>, <code>:wqa</code>, <code>:xa</code></td><td>Write changes from all buffers to disk and close all views.</td></tr>
<tr><td><code>:write-quit-all!</code>, <code>:wqa!</code>, <code>:xa!</code></td><td>Write changes from all buffers to disk and close all views forcefully (ignoring unsaved changes).</td></tr>
<tr><td><code>:quit-all</code>, <code>:qa</code></td><td>Close all views.</td></tr>
<tr><td><code>:quit-all!</code>, <code>:qa!</code></td><td>Force close all views ignoring unsaved changes.</td></tr>
<tr><td><code>:cquit</code>, <code>:cq</code></td><td>Quit with exit code (default 1). Accepts an optional integer exit code (:cq 2).</td></tr>
<tr><td><code>:cquit!</code>, <code>:cq!</code></td><td>Force quit with exit code (default 1) ignoring unsaved changes. Accepts an optional integer exit code (:cq! 2).</td></tr>
<tr><td><code>:theme</code></td><td>Change the editor theme (show current theme if no name specified).</td></tr>
<tr><td><code>:clipboard-yank</code></td><td>Yank main selection into system clipboard.</td></tr>
<tr><td><code>:clipboard-yank-join</code></td><td>Yank joined selections into system clipboard. A separator can be provided as first argument. Default value is newline.</td></tr>
<tr><td><code>:primary-clipboard-yank</code></td><td>Yank main selection into system primary clipboard.</td></tr>
<tr><td><code>:primary-clipboard-yank-join</code></td><td>Yank joined selections into system primary clipboard. A separator can be provided as first argument. Default value is newline.</td></tr>
<tr><td><code>:clipboard-paste-after</code></td><td>Paste system clipboard after selections.</td></tr>
<tr><td><code>:clipboard-paste-before</code></td><td>Paste system clipboard before selections.</td></tr>
<tr><td><code>:clipboard-paste-replace</code></td><td>Replace selections with content of system clipboard.</td></tr>
<tr><td><code>:primary-clipboard-paste-after</code></td><td>Paste primary clipboard after selections.</td></tr>
<tr><td><code>:primary-clipboard-paste-before</code></td><td>Paste primary clipboard before selections.</td></tr>
<tr><td><code>:primary-clipboard-paste-replace</code></td><td>Replace selections with content of system primary clipboard.</td></tr>
<tr><td><code>:show-clipboard-provider</code></td><td>Show clipboard provider name in status bar.</td></tr>
<tr><td><code>:change-current-directory</code>, <code>:cd</code></td><td>Change the current working directory.</td></tr>
<tr><td><code>:show-directory</code>, <code>:pwd</code></td><td>Show the current working directory.</td></tr>
<tr><td><code>:encoding</code></td><td>Set encoding. Based on <code>https://encoding.spec.whatwg.org</code>.</td></tr>
<tr><td><code>:character-info</code>, <code>:char</code></td><td>Get info about the character under the primary cursor.</td></tr>
<tr><td><code>:reload</code></td><td>Discard changes and reload from the source file.</td></tr>
<tr><td><code>:reload-all</code></td><td>Discard changes and reload all documents from the source files.</td></tr>
<tr><td><code>:update</code>, <code>:u</code></td><td>Write changes only if the file has been modified.</td></tr>
<tr><td><code>:lsp-workspace-command</code></td><td>Open workspace command picker</td></tr>
<tr><td><code>:lsp-restart</code></td><td>Restarts the language servers used by the current doc</td></tr>
<tr><td><code>:lsp-stop</code></td><td>Stops the language servers that are used by the current doc</td></tr>
<tr><td><code>:tree-sitter-scopes</code></td><td>Display tree sitter scopes, primarily for theming and development.</td></tr>
<tr><td><code>:debug-start</code>, <code>:dbg</code></td><td>Start a debug session from a given template with given parameters.</td></tr>
<tr><td><code>:debug-remote</code>, <code>:dbg-tcp</code></td><td>Connect to a debug adapter by TCP address and start a debugging session from a given template with given parameters.</td></tr>
<tr><td><code>:debug-eval</code></td><td>Evaluate expression in current debug context.</td></tr>
<tr><td><code>:vsplit</code>, <code>:vs</code></td><td>Open the file in a vertical split.</td></tr>
<tr><td><code>:vsplit-new</code>, <code>:vnew</code></td><td>Open a scratch buffer in a vertical split.</td></tr>
<tr><td><code>:hsplit</code>, <code>:hs</code>, <code>:sp</code></td><td>Open the file in a horizontal split.</td></tr>
<tr><td><code>:hsplit-new</code>, <code>:hnew</code></td><td>Open a scratch buffer in a horizontal split.</td></tr>
<tr><td><code>:tutor</code></td><td>Open the tutorial.</td></tr>
<tr><td><code>:goto</code>, <code>:g</code></td><td>Goto line number.</td></tr>
<tr><td><code>:set-language</code>, <code>:lang</code></td><td>Set the language of current buffer (show current language if no value specified).</td></tr>
<tr><td><code>:set-option</code>, <code>:set</code></td><td>Set a config option at runtime.<br>For example to disable smart case search, use <code>:set search.smart-case false</code>.</td></tr>
<tr><td><code>:toggle-option</code>, <code>:toggle</code></td><td>Toggle a boolean config option at runtime.<br>For example to toggle smart case search, use <code>:toggle search.smart-case</code>.</td></tr>
<tr><td><code>:get-option</code>, <code>:get</code></td><td>Get the current value of a config option.</td></tr>
<tr><td><code>:sort</code></td><td>Sort ranges in selection.</td></tr>
<tr><td><code>:rsort</code></td><td>Sort ranges in selection in reverse order.</td></tr>
<tr><td><code>:reflow</code></td><td>Hard-wrap the current selection of lines to a given width.</td></tr>
<tr><td><code>:tree-sitter-subtree</code>, <code>:ts-subtree</code></td><td>Display tree sitter subtree under cursor, primarily for debugging queries.</td></tr>
<tr><td><code>:config-reload</code></td><td>Refresh user config.</td></tr>
<tr><td><code>:config-open</code></td><td>Open the user config.toml file.</td></tr>
<tr><td><code>:config-open-workspace</code></td><td>Open the workspace config.toml file.</td></tr>
<tr><td><code>:log-open</code></td><td>Open the helix log file.</td></tr>
<tr><td><code>:insert-output</code></td><td>Run shell command, inserting output before each selection.</td></tr>
<tr><td><code>:append-output</code></td><td>Run shell command, appending output after each selection.</td></tr>
<tr><td><code>:pipe</code></td><td>Pipe each selection to the shell command.</td></tr>
<tr><td><code>:pipe-to</code></td><td>Pipe each selection to the shell command, ignoring output.</td></tr>
<tr><td><code>:run-shell-command</code>, <code>:sh</code></td><td>Run a shell command</td></tr>
<tr><td><code>:reset-diff-change</code>, <code>:diffget</code>, <code>:diffg</code></td><td>Reset the diff change at the cursor position.</td></tr>
<tr><td><code>:clear-register</code></td><td>Clear given register. If no argument is provided, clear all registers.</td></tr>
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html" class="active"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="configuration"><a class="header" href="#configuration">Configuration</a></h1>
<p>To override global configuration parameters, create a <code>config.toml</code> file located in your config directory:</p>
<ul>
<li>Linux and Mac: <code>~/.config/helix/config.toml</code></li>
<li>Windows: <code>%AppData%\helix\config.toml</code></li>
</ul>
<blockquote>
<p>💡 You can easily open the config file by typing <code>:config-open</code> within Helix normal mode.</p>
</blockquote>
<p>Example config:</p>
<pre><code class="language-toml">theme = &quot;onedark&quot;
[editor]
line-number = &quot;relative&quot;
mouse = false
[editor.cursor-shape]
insert = &quot;bar&quot;
normal = &quot;block&quot;
select = &quot;underline&quot;
[editor.file-picker]
hidden = false
</code></pre>
<p>You can use a custom configuration file by specifying it with the <code>-c</code> or
<code>--config</code> command line argument, for example <code>hx -c path/to/custom-config.toml</code>.
Additionally, you can reload the configuration file by sending the USR1
signal to the Helix process on Unix operating systems, such as by using the command <code>pkill -USR1 hx</code>.</p>
<p>Finally, you can have a <code>config.toml</code> local to a project by putting it under a <code>.helix</code> directory in your repository.
Its settings will be merged with the configuration directory <code>config.toml</code> and the built-in configuration.</p>
<h2 id="editor"><a class="header" href="#editor">Editor</a></h2>
<h3 id="editor-section"><a class="header" href="#editor-section"><code>[editor]</code> Section</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>scrolloff</code></td><td>Number of lines of padding around the edge of the screen when scrolling</td><td><code>5</code></td></tr>
<tr><td><code>mouse</code></td><td>Enable mouse mode</td><td><code>true</code></td></tr>
<tr><td><code>middle-click-paste</code></td><td>Middle click paste support</td><td><code>true</code></td></tr>
<tr><td><code>scroll-lines</code></td><td>Number of lines to scroll per scroll wheel step</td><td><code>3</code></td></tr>
<tr><td><code>shell</code></td><td>Shell to use when running external commands</td><td>Unix: <code>[&quot;sh&quot;, &quot;-c&quot;]</code><br/>Windows: <code>[&quot;cmd&quot;, &quot;/C&quot;]</code></td></tr>
<tr><td><code>line-number</code></td><td>Line number display: <code>absolute</code> simply shows each line's number, while <code>relative</code> shows the distance from the current line. When unfocused or in insert mode, <code>relative</code> will still show absolute line numbers</td><td><code>absolute</code></td></tr>
<tr><td><code>cursorline</code></td><td>Highlight all lines with a cursor</td><td><code>false</code></td></tr>
<tr><td><code>cursorcolumn</code></td><td>Highlight all columns with a cursor</td><td><code>false</code></td></tr>
<tr><td><code>gutters</code></td><td>Gutters to display: Available are <code>diagnostics</code> and <code>diff</code> and <code>line-numbers</code> and <code>spacer</code>, note that <code>diagnostics</code> also includes other features like breakpoints, 1-width padding will be inserted if gutters is non-empty</td><td><code>[&quot;diagnostics&quot;, &quot;spacer&quot;, &quot;line-numbers&quot;, &quot;spacer&quot;, &quot;diff&quot;]</code></td></tr>
<tr><td><code>auto-completion</code></td><td>Enable automatic pop up of auto-completion</td><td><code>true</code></td></tr>
<tr><td><code>auto-format</code></td><td>Enable automatic formatting on save</td><td><code>true</code></td></tr>
<tr><td><code>auto-save</code></td><td>Enable automatic saving on the focus moving away from Helix. Requires <a href="https://github.com/helix-editor/helix/wiki/Terminal-Support">focus event support</a> from your terminal</td><td><code>false</code></td></tr>
<tr><td><code>idle-timeout</code></td><td>Time in milliseconds since last keypress before idle timers trigger. Used for autocompletion, set to 0 for instant</td><td><code>400</code></td></tr>
<tr><td><code>completion-trigger-len</code></td><td>The min-length of word under cursor to trigger autocompletion</td><td><code>2</code></td></tr>
<tr><td><code>completion-replace</code></td><td>Set to <code>true</code> to make completions always replace the entire word and not just the part before the cursor</td><td><code>false</code></td></tr>
<tr><td><code>auto-info</code></td><td>Whether to display info boxes</td><td><code>true</code></td></tr>
<tr><td><code>true-color</code></td><td>Set to <code>true</code> to override automatic detection of terminal truecolor support in the event of a false negative</td><td><code>false</code></td></tr>
<tr><td><code>undercurl</code></td><td>Set to <code>true</code> to override automatic detection of terminal undercurl support in the event of a false negative</td><td><code>false</code></td></tr>
<tr><td><code>rulers</code></td><td>List of column positions at which to display the rulers. Can be overridden by language specific <code>rulers</code> in <code>languages.toml</code> file</td><td><code>[]</code></td></tr>
<tr><td><code>bufferline</code></td><td>Renders a line at the top of the editor displaying open buffers. Can be <code>always</code>, <code>never</code> or <code>multiple</code> (only shown if more than one buffer is in use)</td><td><code>never</code></td></tr>
<tr><td><code>color-modes</code></td><td>Whether to color the mode indicator with different colors depending on the mode itself</td><td><code>false</code></td></tr>
<tr><td><code>text-width</code></td><td>Maximum line length. Used for the <code>:reflow</code> command and soft-wrapping if <code>soft-wrap.wrap-at-text-width</code> is set</td><td><code>80</code></td></tr>
<tr><td><code>workspace-lsp-roots</code></td><td>Directories relative to the workspace root that are treated as LSP roots. Should only be set in <code>.helix/config.toml</code></td><td><code>[]</code></td></tr>
</tbody></table>
</div>
<h3 id="editorstatusline-section"><a class="header" href="#editorstatusline-section"><code>[editor.statusline]</code> Section</a></h3>
<p>Allows configuring the statusline at the bottom of the editor.</p>
<p>The configuration distinguishes between three areas of the status line:</p>
<p><code>[ ... ... LEFT ... ... | ... ... ... ... CENTER ... ... ... ... | ... ... RIGHT ... ... ]</code></p>
<p>Statusline elements can be defined as follows:</p>
<pre><code class="language-toml">[editor.statusline]
left = [&quot;mode&quot;, &quot;spinner&quot;]
center = [&quot;file-name&quot;]
right = [&quot;diagnostics&quot;, &quot;selections&quot;, &quot;position&quot;, &quot;file-encoding&quot;, &quot;file-line-ending&quot;, &quot;file-type&quot;]
separator = &quot;│&quot;
mode.normal = &quot;NORMAL&quot;
mode.insert = &quot;INSERT&quot;
mode.select = &quot;SELECT&quot;
</code></pre>
<p>The <code>[editor.statusline]</code> key takes the following sub-keys:</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>left</code></td><td>A list of elements aligned to the left of the statusline</td><td><code>[&quot;mode&quot;, &quot;spinner&quot;, &quot;file-name&quot;]</code></td></tr>
<tr><td><code>center</code></td><td>A list of elements aligned to the middle of the statusline</td><td><code>[]</code></td></tr>
<tr><td><code>right</code></td><td>A list of elements aligned to the right of the statusline</td><td><code>[&quot;diagnostics&quot;, &quot;selections&quot;, &quot;position&quot;, &quot;file-encoding&quot;]</code></td></tr>
<tr><td><code>separator</code></td><td>The character used to separate elements in the statusline</td><td><code>&quot;│&quot;</code></td></tr>
<tr><td><code>mode.normal</code></td><td>The text shown in the <code>mode</code> element for normal mode</td><td><code>&quot;NOR&quot;</code></td></tr>
<tr><td><code>mode.insert</code></td><td>The text shown in the <code>mode</code> element for insert mode</td><td><code>&quot;INS&quot;</code></td></tr>
<tr><td><code>mode.select</code></td><td>The text shown in the <code>mode</code> element for select mode</td><td><code>&quot;SEL&quot;</code></td></tr>
</tbody></table>
</div>
<p>The following statusline elements can be configured:</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>mode</code></td><td>The current editor mode (<code>mode.normal</code>/<code>mode.insert</code>/<code>mode.select</code>)</td></tr>
<tr><td><code>spinner</code></td><td>A progress spinner indicating LSP activity</td></tr>
<tr><td><code>file-name</code></td><td>The path/name of the opened file</td></tr>
<tr><td><code>file-base-name</code></td><td>The basename of the opened file</td></tr>
<tr><td><code>file-modification-indicator</code></td><td>The indicator to show whether the file is modified (a <code>[+]</code> appears when there are unsaved changes)</td></tr>
<tr><td><code>file-encoding</code></td><td>The encoding of the opened file if it differs from UTF-8</td></tr>
<tr><td><code>file-line-ending</code></td><td>The file line endings (CRLF or LF)</td></tr>
<tr><td><code>total-line-numbers</code></td><td>The total line numbers of the opened file</td></tr>
<tr><td><code>file-type</code></td><td>The type of the opened file</td></tr>
<tr><td><code>diagnostics</code></td><td>The number of warnings and/or errors</td></tr>
<tr><td><code>workspace-diagnostics</code></td><td>The number of warnings and/or errors on workspace</td></tr>
<tr><td><code>selections</code></td><td>The number of active selections</td></tr>
<tr><td><code>primary-selection-length</code></td><td>The number of characters currently in primary selection</td></tr>
<tr><td><code>position</code></td><td>The cursor position</td></tr>
<tr><td><code>position-percentage</code></td><td>The cursor position as a percentage of the total number of lines</td></tr>
<tr><td><code>separator</code></td><td>The string defined in <code>editor.statusline.separator</code> (defaults to <code>&quot;│&quot;</code>)</td></tr>
<tr><td><code>spacer</code></td><td>Inserts a space between elements (multiple/contiguous spacers may be specified)</td></tr>
<tr><td><code>version-control</code></td><td>The current branch name or detached commit hash of the opened workspace</td></tr>
</tbody></table>
</div>
<h3 id="editorlsp-section"><a class="header" href="#editorlsp-section"><code>[editor.lsp]</code> Section</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>enable</code></td><td>Enables LSP integration. Setting to false will completely disable language servers regardless of language settings.</td><td><code>true</code></td></tr>
<tr><td><code>display-messages</code></td><td>Display LSP progress messages below statusline<sup class="footnote-reference"><a href="#1">1</a></sup></td><td><code>false</code></td></tr>
<tr><td><code>auto-signature-help</code></td><td>Enable automatic popup of signature help (parameter hints)</td><td><code>true</code></td></tr>
<tr><td><code>display-inlay-hints</code></td><td>Display inlay hints<sup class="footnote-reference"><a href="#2">2</a></sup></td><td><code>false</code></td></tr>
<tr><td><code>display-signature-help-docs</code></td><td>Display docs under signature help popup</td><td><code>true</code></td></tr>
<tr><td><code>snippets</code></td><td>Enables snippet completions. Requires a server restart (<code>:lsp-restart</code>) to take effect after <code>:config-reload</code>/<code>:set</code>.</td><td><code>true</code></td></tr>
<tr><td><code>goto-reference-include-declaration</code></td><td>Include declaration in the goto references popup.</td><td><code>true</code></td></tr>
</tbody></table>
</div>
<div class="footnote-definition" id="1"><sup class="footnote-definition-label">1</sup>
<p>By default, a progress spinner is shown in the statusline beside the file path.
<sup class="footnote-reference"><a href="#2">2</a></sup>: 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!</p>
</div>
<h3 id="editorcursor-shape-section"><a class="header" href="#editorcursor-shape-section"><code>[editor.cursor-shape]</code> Section</a></h3>
<p>Defines the shape of cursor in each mode.
Valid values for these options are <code>block</code>, <code>bar</code>, <code>underline</code>, or <code>hidden</code>.</p>
<blockquote>
<p>💡 Due to limitations of the terminal environment, only the primary cursor can
change shape.</p>
</blockquote>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>normal</code></td><td>Cursor shape in <a href="./keymap.html#normal-mode">normal mode</a></td><td><code>block</code></td></tr>
<tr><td><code>insert</code></td><td>Cursor shape in <a href="./keymap.html#insert-mode">insert mode</a></td><td><code>block</code></td></tr>
<tr><td><code>select</code></td><td>Cursor shape in <a href="./keymap.html#select--extend-mode">select mode</a></td><td><code>block</code></td></tr>
</tbody></table>
</div>
<h3 id="editorfile-picker-section"><a class="header" href="#editorfile-picker-section"><code>[editor.file-picker]</code> Section</a></h3>
<p>Set options for file picker and global search. Ignoring a file means it is
not visible in the Helix file picker and global search.</p>
<p>All git related options are only enabled in a git repository.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>hidden</code></td><td>Enables ignoring hidden files</td><td>true</td></tr>
<tr><td><code>follow-symlinks</code></td><td>Follow symlinks instead of ignoring them</td><td>true</td></tr>
<tr><td><code>deduplicate-links</code></td><td>Ignore symlinks that point at files already shown in the picker</td><td>true</td></tr>
<tr><td><code>parents</code></td><td>Enables reading ignore files from parent directories</td><td>true</td></tr>
<tr><td><code>ignore</code></td><td>Enables reading <code>.ignore</code> files</td><td>true</td></tr>
<tr><td><code>git-ignore</code></td><td>Enables reading <code>.gitignore</code> files</td><td>true</td></tr>
<tr><td><code>git-global</code></td><td>Enables reading global <code>.gitignore</code>, whose path is specified in git's config: <code>core.excludefile</code> option</td><td>true</td></tr>
<tr><td><code>git-exclude</code></td><td>Enables reading <code>.git/info/exclude</code> files</td><td>true</td></tr>
<tr><td><code>max-depth</code></td><td>Set with an integer value for maximum depth to recurse</td><td>Defaults to <code>None</code>.</td></tr>
</tbody></table>
</div>
<h3 id="editorauto-pairs-section"><a class="header" href="#editorauto-pairs-section"><code>[editor.auto-pairs]</code> Section</a></h3>
<p>Enables automatic insertion of pairs to parentheses, brackets, etc. Can be a
simple boolean value, or a specific mapping of pairs of single characters.</p>
<p>To disable auto-pairs altogether, set <code>auto-pairs</code> to <code>false</code>:</p>
<pre><code class="language-toml">[editor]
auto-pairs = false # defaults to `true`
</code></pre>
<p>The default pairs are <code>(){}[]''&quot;&quot;``</code>, but these can be customized by
setting <code>auto-pairs</code> to a TOML table:</p>
<pre><code class="language-toml">[editor.auto-pairs]
'(' = ')'
'{' = '}'
'[' = ']'
'&quot;' = '&quot;'
'`' = '`'
'&lt;' = '&gt;'
</code></pre>
<p>Additionally, this setting can be used in a language config. Unless
the editor setting is <code>false</code>, this will override the editor config in
documents with this language.</p>
<p>Example <code>languages.toml</code> that adds &lt;&gt; and removes ''</p>
<pre><code class="language-toml">[[language]]
name = &quot;rust&quot;
[language.auto-pairs]
'(' = ')'
'{' = '}'
'[' = ']'
'&quot;' = '&quot;'
'`' = '`'
'&lt;' = '&gt;'
</code></pre>
<h3 id="editorsearch-section"><a class="header" href="#editorsearch-section"><code>[editor.search]</code> Section</a></h3>
<p>Search specific options.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>smart-case</code></td><td>Enable smart case regex searching (case-insensitive unless pattern contains upper case characters)</td><td><code>true</code></td></tr>
<tr><td><code>wrap-around</code></td><td>Whether the search should wrap after depleting the matches</td><td><code>true</code></td></tr>
</tbody></table>
</div>
<h3 id="editorwhitespace-section"><a class="header" href="#editorwhitespace-section"><code>[editor.whitespace]</code> Section</a></h3>
<p>Options for rendering whitespace with visible characters. Use <code>:set whitespace.render all</code> to temporarily enable visible whitespace.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>render</code></td><td>Whether to render whitespace. May either be <code>&quot;all&quot;</code> or <code>&quot;none&quot;</code>, or a table with sub-keys <code>space</code>, <code>nbsp</code>, <code>tab</code>, and <code>newline</code></td><td><code>&quot;none&quot;</code></td></tr>
<tr><td><code>characters</code></td><td>Literal characters to use when rendering whitespace. Sub-keys may be any of <code>tab</code>, <code>space</code>, <code>nbsp</code>, <code>newline</code> or <code>tabpad</code></td><td>See example below</td></tr>
</tbody></table>
</div>
<p>Example</p>
<pre><code class="language-toml">[editor.whitespace]
render = &quot;all&quot;
# or control each character
[editor.whitespace.render]
space = &quot;all&quot;
tab = &quot;all&quot;
newline = &quot;none&quot;
[editor.whitespace.characters]
space = &quot;·&quot;
nbsp = &quot;⍽&quot;
tab = &quot;→&quot;
newline = &quot;⏎&quot;
tabpad = &quot;·&quot; # Tabs will look like &quot;→···&quot; (depending on tab width)
</code></pre>
<h3 id="editorindent-guides-section"><a class="header" href="#editorindent-guides-section"><code>[editor.indent-guides]</code> Section</a></h3>
<p>Options for rendering vertical indent guides.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>render</code></td><td>Whether to render indent guides</td><td><code>false</code></td></tr>
<tr><td><code>character</code></td><td>Literal character to use for rendering the indent guide</td><td><code>│</code></td></tr>
<tr><td><code>skip-levels</code></td><td>Number of indent levels to skip</td><td><code>0</code></td></tr>
</tbody></table>
</div>
<p>Example:</p>
<pre><code class="language-toml">[editor.indent-guides]
render = true
character = &quot;╎&quot; # Some characters that work well: &quot;▏&quot;, &quot;┆&quot;, &quot;┊&quot;, &quot;⸽&quot;
skip-levels = 1
</code></pre>
<h3 id="editorgutters-section"><a class="header" href="#editorgutters-section"><code>[editor.gutters]</code> Section</a></h3>
<p>For simplicity, <code>editor.gutters</code> accepts an array of gutter types, which will
use default settings for all gutter components.</p>
<pre><code class="language-toml">[editor]
gutters = [&quot;diff&quot;, &quot;diagnostics&quot;, &quot;line-numbers&quot;, &quot;spacer&quot;]
</code></pre>
<p>To customize the behavior of gutters, the <code>[editor.gutters]</code> section must
be used. This section contains top level settings, as well as settings for
specific gutter components as subsections.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>layout</code></td><td>A vector of gutters to display</td><td><code>[&quot;diagnostics&quot;, &quot;spacer&quot;, &quot;line-numbers&quot;, &quot;spacer&quot;, &quot;diff&quot;]</code></td></tr>
</tbody></table>
</div>
<p>Example:</p>
<pre><code class="language-toml">[editor.gutters]
layout = [&quot;diff&quot;, &quot;diagnostics&quot;, &quot;line-numbers&quot;, &quot;spacer&quot;]
</code></pre>
<h4 id="editorguttersline-numbers-section"><a class="header" href="#editorguttersline-numbers-section"><code>[editor.gutters.line-numbers]</code> Section</a></h4>
<p>Options for the line number gutter</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>min-width</code></td><td>The minimum number of characters to use</td><td><code>3</code></td></tr>
</tbody></table>
</div>
<p>Example:</p>
<pre><code class="language-toml">[editor.gutters.line-numbers]
min-width = 1
</code></pre>
<h4 id="editorguttersdiagnostics-section"><a class="header" href="#editorguttersdiagnostics-section"><code>[editor.gutters.diagnostics]</code> Section</a></h4>
<p>Currently unused</p>
<h4 id="editorguttersdiff-section"><a class="header" href="#editorguttersdiff-section"><code>[editor.gutters.diff]</code> Section</a></h4>
<p>Currently unused</p>
<h4 id="editorguttersspacer-section"><a class="header" href="#editorguttersspacer-section"><code>[editor.gutters.spacer]</code> Section</a></h4>
<p>Currently unused</p>
<h3 id="editorsoft-wrap-section"><a class="header" href="#editorsoft-wrap-section"><code>[editor.soft-wrap]</code> Section</a></h3>
<p>Options for soft wrapping lines that exceed the view width:</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Default</th></tr></thead><tbody>
<tr><td><code>enable</code></td><td>Whether soft wrapping is enabled.</td><td><code>false</code></td></tr>
<tr><td><code>max-wrap</code></td><td>Maximum free space left at the end of the line.</td><td><code>20</code></td></tr>
<tr><td><code>max-indent-retain</code></td><td>Maximum indentation to carry over when soft wrapping a line.</td><td><code>40</code></td></tr>
<tr><td><code>wrap-indicator</code></td><td>Text inserted before soft wrapped lines, highlighted with <code>ui.virtual.wrap</code></td><td><code>↪ </code></td></tr>
<tr><td><code>wrap-at-text-width</code></td><td>Soft wrap at <code>text-width</code> instead of using the full viewport size.</td><td><code>false</code></td></tr>
</tbody></table>
</div>
<p>Example:</p>
<pre><code class="language-toml">[editor.soft-wrap]
enable = true
max-wrap = 25 # increase value to reduce forced mid-word wrapping
max-indent-retain = 0
wrap-indicator = &quot;&quot; # set wrap-indicator to &quot;&quot; to hide it
</code></pre>
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499
master/css/chrome.css
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@ -0,0 +1,499 @@
/* CSS for UI elements (a.k.a. chrome) */
@import 'variables.css';
::-webkit-scrollbar {
background: var(--bg);
}
::-webkit-scrollbar-thumb {
background: var(--scrollbar);
}
html {
scrollbar-color: var(--scrollbar) var(--bg);
}
#searchresults a,
.content a:link,
a:visited,
a > .hljs {
color: var(--links);
}
.content a:hover {
text-decoration: underline;
}
/* Menu Bar */
#menu-bar,
#menu-bar-hover-placeholder {
z-index: 101;
margin: auto calc(0px - var(--page-padding));
}
#menu-bar {
position: relative;
display: flex;
flex-wrap: wrap;
background-color: var(--bg);
border-bottom-color: var(--bg);
border-bottom-width: 1px;
border-bottom-style: solid;
}
#menu-bar.sticky,
.js #menu-bar-hover-placeholder:hover + #menu-bar,
.js #menu-bar:hover,
.js.sidebar-visible #menu-bar {
position: -webkit-sticky;
position: sticky;
top: 0 !important;
}
#menu-bar-hover-placeholder {
position: sticky;
position: -webkit-sticky;
top: 0;
height: var(--menu-bar-height);
}
#menu-bar.bordered {
border-bottom-color: var(--table-border-color);
}
#menu-bar i, #menu-bar .icon-button {
position: relative;
padding: 0 8px;
z-index: 10;
line-height: var(--menu-bar-height);
cursor: pointer;
transition: color 0.5s;
}
@media only screen and (max-width: 420px) {
#menu-bar i, #menu-bar .icon-button {
padding: 0 5px;
}
}
.icon-button {
border: none;
background: none;
padding: 0;
color: inherit;
}
.icon-button i {
margin: 0;
}
.right-buttons {
margin: 0 15px;
}
.right-buttons a {
text-decoration: none;
}
.left-buttons {
display: flex;
margin: 0 5px;
}
.no-js .left-buttons {
display: none;
}
.menu-title {
display: inline-block;
font-weight: 200;
font-size: 2.4rem;
line-height: var(--menu-bar-height);
text-align: center;
margin: 0;
flex: 1;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.js .menu-title {
cursor: pointer;
}
.menu-bar,
.menu-bar:visited,
.nav-chapters,
.nav-chapters:visited,
.mobile-nav-chapters,
.mobile-nav-chapters:visited,
.menu-bar .icon-button,
.menu-bar a i {
color: var(--icons);
}
.menu-bar i:hover,
.menu-bar .icon-button:hover,
.nav-chapters:hover,
.mobile-nav-chapters i:hover {
color: var(--icons-hover);
}
/* Nav Icons */
.nav-chapters {
font-size: 2.5em;
text-align: center;
text-decoration: none;
position: fixed;
top: 0;
bottom: 0;
margin: 0;
max-width: 150px;
min-width: 90px;
display: flex;
justify-content: center;
align-content: center;
flex-direction: column;
transition: color 0.5s, background-color 0.5s;
}
.nav-chapters:hover {
text-decoration: none;
background-color: var(--theme-hover);
transition: background-color 0.15s, color 0.15s;
}
.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; }
}
/* Inline code */
:not(pre) > .hljs {
display: inline;
padding: 0.1em 0.3em;
border-radius: 3px;
}
:not(pre):not(a):not(td):not(p) > .hljs {
color: var(--inline-code-color);
overflow-x: initial;
}
a:hover > .hljs {
text-decoration: underline;
}
pre {
position: relative;
}
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;
}
pre > .result {
margin-top: 10px;
}
/* Search */
#searchresults a {
text-decoration: none;
}
mark {
border-radius: 2px;
padding: 0 3px 1px 3px;
margin: 0 -3px -1px -3px;
background-color: var(--search-mark-bg);
transition: background-color 300ms linear;
cursor: pointer;
}
mark.fade-out {
background-color: rgba(0,0,0,0) !important;
cursor: auto;
}
.searchbar-outer {
margin-left: auto;
margin-right: auto;
max-width: var(--content-max-width);
}
#searchbar {
width: 100%;
margin: 5px auto 0px auto;
padding: 10px 16px;
transition: box-shadow 300ms ease-in-out;
border: 1px solid var(--searchbar-border-color);
border-radius: 3px;
background-color: var(--searchbar-bg);
color: var(--searchbar-fg);
}
#searchbar:focus,
#searchbar.active {
box-shadow: 0 0 3px var(--searchbar-shadow-color);
}
.searchresults-header {
font-weight: bold;
font-size: 1em;
padding: 18px 0 0 5px;
color: var(--searchresults-header-fg);
}
.searchresults-outer {
margin-left: auto;
margin-right: auto;
max-width: var(--content-max-width);
border-bottom: 1px dashed var(--searchresults-border-color);
}
ul#searchresults {
list-style: none;
padding-left: 20px;
}
ul#searchresults li {
margin: 10px 0px;
padding: 2px;
border-radius: 2px;
}
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;
}
ul#searchresults span.teaser em {
font-weight: bold;
font-style: normal;
}
/* Sidebar */
.sidebar {
position: fixed;
left: 0;
top: 0;
bottom: 0;
width: var(--sidebar-width);
font-size: 0.875em;
box-sizing: border-box;
-webkit-overflow-scrolling: touch;
overscroll-behavior-y: contain;
background-color: var(--sidebar-bg);
color: var(--sidebar-fg);
}
.sidebar-resizing {
-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;
right: 0;
top: 0;
bottom: 0;
}
.js .sidebar .sidebar-resize-handle {
cursor: col-resize;
width: 5px;
}
.sidebar-hidden .sidebar {
transform: translateX(calc(0px - var(--sidebar-width)));
}
.sidebar::-webkit-scrollbar {
background: var(--sidebar-bg);
}
.sidebar::-webkit-scrollbar-thumb {
background: var(--scrollbar);
}
.sidebar-visible .page-wrapper {
transform: translateX(var(--sidebar-width));
}
@media only screen and (min-width: 620px) {
.sidebar-visible .page-wrapper {
transform: none;
margin-left: var(--sidebar-width);
}
}
.chapter {
list-style: none outside none;
padding-left: 0;
margin: .25rem 0;
}
.chapter ol {
width: 100%;
}
.chapter li {
display: flex;
color: var(--sidebar-non-existent);
}
.chapter li a {
display: block;
text-decoration: none;
color: var(--sidebar-fg);
}
.chapter li a:hover {
color: var(--sidebar-active);
}
.chapter li a.active {
color: var(--sidebar-active);
}
.chapter li > a.toggle {
cursor: pointer;
display: block;
margin-left: auto;
padding: 0 10px;
user-select: none;
opacity: 0.68;
}
.chapter li > a.toggle div {
transition: transform 0.5s;
}
/* collapse the section */
.chapter li:not(.expanded) + li > ol {
display: none;
}
.chapter li.chapter-item {
padding: 1rem 1.5rem;
}
.chapter .section li.chapter-item {
padding: .5rem .5rem 0 .5rem;
}
.chapter li.expanded > a.toggle div {
transform: rotate(90deg);
}
.spacer {
width: 100%;
height: 3px;
margin: 5px 0px;
}
.chapter .spacer {
background-color: var(--sidebar-spacer);
}
@media (-moz-touch-enabled: 1), (pointer: coarse) {
.chapter li a { padding: 5px 0; }
.spacer { margin: 10px 0; }
}
.section {
list-style: none outside none;
padding-left: 2rem;
line-height: 1.9em;
}
/* 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);
border: 1px solid var(--theme-popup-border);
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;
text-align: left;
cursor: pointer;
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;
}

233
master/css/general.css
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/* 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 }
.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;
}
.content p { line-height: 1.45em; }
.content ol { line-height: 1.45em; }
.content ul { line-height: 1.45em; }
.content a { text-decoration: none; }
.content a:hover { text-decoration: underline; }
.content img { max-width: 100%; }
.content .header:link,
.content .header:visited {
color: var(--fg);
color: var(--heading-fg);
}
.content .header:link,
.content .header:visited:hover {
text-decoration: none;
}
table {
margin: 0 auto;
border-collapse: collapse;
width: 100%;
}
table td {
padding: .75rem;
width: auto;
}
table thead {
background: var(--table-header-bg);
}
table thead td {
font-weight: 700;
border: none;
}
table thead th {
padding: .75rem;
text-align: left;
font-weight: 500;
line-height: 1.5;
width: auto;
}
table thead tr {
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;
padding: 5px 8px;
margin: 5px;
z-index: 1000;
}
.tooltipped .tooltiptext {
visibility: visible;
}
.chapter li.part-title {
color: var(--sidebar-fg);
margin: 5px 0px;
font-weight: bold;
}
.result-no-output {
font-style: italic;
}

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#sidebar,
#menu-bar,
.nav-chapters,
.mobile-nav-chapters {
display: none;
}
#page-wrapper.page-wrapper {
transform: none;
margin-left: 0px;
overflow-y: initial;
}
#content {
max-width: none;
margin: 0;
padding: 0;
}
.page {
overflow-y: initial;
}
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;
}
pre, code {
page-break-inside: avoid;
white-space: pre-wrap;
}
.fa {
display: none !important;
}

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/* 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);
--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;
--search-mark-bg: #e3b171;
--hljs-background: #191f26;
--hljs-color: #e6e1cf;
--hljs-quote: #5c6773;
--hljs-variable: #ff7733;
--hljs-type: #ffee99;
--hljs-title: #b8cc52;
--hljs-symbol: #ffb454;
--hljs-selector-tag: #ff7733;
--hljs-selector-tag: #36a3d9;
--hljs-selector-tag: #00568d;
--hljs-selector-tag: #91b362;
--hljs-selector-tag: #d96c75;
}
.coal {
--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;
--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;
}
.light {
--bg: hsl(0, 0%, 100%);
--fg: hsl(0, 0%, 0%);
--sidebar-bg: #fafafa;
--sidebar-fg: hsl(0, 0%, 0%);
--sidebar-non-existent: #aaaaaa;
--sidebar-active: #1f1fff;
--sidebar-spacer: #f4f4f4;
--scrollbar: #8F8F8F;
--icons: #747474;
--icons-hover: #000000;
--links: #20609f;
--inline-code-color: #301900;
--theme-popup-bg: #fafafa;
--theme-popup-border: #cccccc;
--theme-hover: #e6e6e6;
--quote-bg: hsl(197, 37%, 96%);
--quote-border: hsl(197, 37%, 91%);
--table-border-color: hsl(0, 0%, 95%);
--table-header-bg: hsl(0, 0%, 80%);
--table-alternate-bg: hsl(0, 0%, 97%);
--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: #e4f2fe;
--search-mark-bg: #a2cff5;
--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;
}
.navy {
--bg: hsl(226, 23%, 11%);
--fg: #bcbdd0;
--sidebar-bg: #282d3f;
--sidebar-fg: #c8c9db;
--sidebar-non-existent: #505274;
--sidebar-active: #2b79a2;
--sidebar-spacer: #2d334f;
--scrollbar: var(--sidebar-fg);
--icons: #737480;
--icons-hover: #b7b9cc;
--links: #2b79a2;
--inline-code-color: #c5c8c6;
--theme-popup-bg: #161923;
--theme-popup-border: #737480;
--theme-hover: #282e40;
--quote-bg: hsl(226, 15%, 17%);
--quote-border: hsl(226, 15%, 22%);
--table-border-color: hsl(226, 23%, 16%);
--table-header-bg: hsl(226, 23%, 31%);
--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;
*/
}

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master/fonts/OPEN-SANS-LICENSE.txt
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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
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2. Grant of Copyright License. Subject to the terms and conditions of
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Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
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presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
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permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
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using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
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OTHER DEALINGS IN THE FONT SOFTWARE.

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/* Open Sans is licensed under the Apache License, Version 2.0. See http://www.apache.org/licenses/LICENSE-2.0 */
/* Source Code Pro is under the Open Font License. See https://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL */
/* open-sans-300 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 300;
src: local('Open Sans Light'), local('OpenSans-Light'),
url('open-sans-v17-all-charsets-300.woff2') format('woff2');
}
/* open-sans-300italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 300;
src: local('Open Sans Light Italic'), local('OpenSans-LightItalic'),
url('open-sans-v17-all-charsets-300italic.woff2') format('woff2');
}
/* open-sans-regular - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 400;
src: local('Open Sans Regular'), local('OpenSans-Regular'),
url('open-sans-v17-all-charsets-regular.woff2') format('woff2');
}
/* open-sans-italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 400;
src: local('Open Sans Italic'), local('OpenSans-Italic'),
url('open-sans-v17-all-charsets-italic.woff2') format('woff2');
}
/* open-sans-600 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 600;
src: local('Open Sans SemiBold'), local('OpenSans-SemiBold'),
url('open-sans-v17-all-charsets-600.woff2') format('woff2');
}
/* open-sans-600italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 600;
src: local('Open Sans SemiBold Italic'), local('OpenSans-SemiBoldItalic'),
url('open-sans-v17-all-charsets-600italic.woff2') format('woff2');
}
/* open-sans-700 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 700;
src: local('Open Sans Bold'), local('OpenSans-Bold'),
url('open-sans-v17-all-charsets-700.woff2') format('woff2');
}
/* open-sans-700italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 700;
src: local('Open Sans Bold Italic'), local('OpenSans-BoldItalic'),
url('open-sans-v17-all-charsets-700italic.woff2') format('woff2');
}
/* open-sans-800 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 800;
src: local('Open Sans ExtraBold'), local('OpenSans-ExtraBold'),
url('open-sans-v17-all-charsets-800.woff2') format('woff2');
}
/* open-sans-800italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 800;
src: local('Open Sans ExtraBold Italic'), local('OpenSans-ExtraBoldItalic'),
url('open-sans-v17-all-charsets-800italic.woff2') format('woff2');
}
/* source-code-pro-500 - latin_vietnamese_latin-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Source Code Pro';
font-style: normal;
font-weight: 500;
src: url('source-code-pro-v11-all-charsets-500.woff2') format('woff2');
}

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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html" class="active"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="migrating-from-vim"><a class="header" href="#migrating-from-vim">Migrating from Vim</a></h1>
<p>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 <code>selection → action</code> 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.</p>
<p>See also Kakoune's <a href="https://github.com/mawww/kakoune/wiki/Migrating-from-Vim">Migrating from Vim</a> and Helix's <a href="https://github.com/helix-editor/helix/wiki/Migrating-from-Vim">Migrating from Vim</a>.</p>
<blockquote>
<p>TODO: Mention textobjects, surround, registers</p>
</blockquote>
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<h1 id="adding-new-languages-to-helix"><a class="header" href="#adding-new-languages-to-helix">Adding new languages to Helix</a></h1>
<p>In order to add a new language to Helix, you will need to follow the steps
below.</p>
<h2 id="language-configuration"><a class="header" href="#language-configuration">Language configuration</a></h2>
<ol>
<li>Add a new <code>[[language]]</code> entry in the <code>languages.toml</code> file and provide the
necessary configuration for the new language. For more information on
language configuration, refer to the
<a href="../languages.html">language configuration section</a> of the documentation.
A new language server can be added by extending the <code>[language-server]</code> table in the same file.</li>
<li>If you are adding a new language or updating an existing language server
configuration, run the command <code>cargo xtask docgen</code> to update the
<a href="../lang-support.html">Language Support</a> documentation.</li>
</ol>
<blockquote>
<p>💡 If you are adding a new Language Server configuration, make sure to update
the
<a href="https://github.com/helix-editor/helix/wiki/How-to-install-the-default-language-servers">Language Server Wiki</a>
with the installation instructions.</p>
</blockquote>
<h2 id="grammar-configuration"><a class="header" href="#grammar-configuration">Grammar configuration</a></h2>
<ol>
<li>If a tree-sitter grammar is available for the new language, add a new
<code>[[grammar]]</code> entry to the <code>languages.toml</code> file.</li>
<li>If you are testing the grammar locally, you can use the <code>source.path</code> key
with an absolute path to the grammar. However, before submitting a pull
request, make sure to switch to using <code>source.git</code>.</li>
</ol>
<h2 id="queries"><a class="header" href="#queries">Queries</a></h2>
<ol>
<li>In order to provide syntax highlighting and indentation for the new language,
you will need to add queries.</li>
<li>Create a new directory for the language with the path
<code>runtime/queries/&lt;name&gt;/</code>.</li>
<li>Refer to the
<a href="https://tree-sitter.github.io/tree-sitter/syntax-highlighting#queries">tree-sitter website</a>
for more information on writing queries.</li>
</ol>
<blockquote>
<p>💡 In Helix, the first matching query takes precedence when evaluating
queries, which is different from other editors such as Neovim where the last
matching query supersedes the ones before it. See
<a href="https://github.com/helix-editor/helix/pull/1170#issuecomment-997294090">this issue</a>
for an example.</p>
</blockquote>
<h2 id="common-issues"><a class="header" href="#common-issues">Common issues</a></h2>
<ul>
<li>If you encounter errors when running Helix after switching branches, you may
need to update the tree-sitter grammars. Run the command <code>hx --grammar fetch</code>
to fetch the grammars and <code>hx --grammar build</code> to build any out-of-date
grammars.</li>
<li>If a parser is causing a segfault, or you want to remove it, make sure to
remove the compiled parser located at <code>runtime/grammars/&lt;name&gt;.so</code>.</li>
</ul>
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<h1 id="adding-indent-queries"><a class="header" href="#adding-indent-queries">Adding indent queries</a></h1>
<p>Helix uses tree-sitter to correctly indent new lines. This requires
a tree-sitter grammar and an <code>indent.scm</code> query file placed in
<code>runtime/queries/{language}/indents.scm</code>. 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).</p>
<p>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.</p>
<h2 id="scopes"><a class="header" href="#scopes">Scopes</a></h2>
<p>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):</p>
<ul>
<li>
<p><code>all</code>:
This scope applies to the whole captured node. This is only different from
<code>tail</code> when the captured node is the first node on its line.</p>
</li>
<li>
<p><code>tail</code>:
This scope applies to everything except for the first line of the
captured node.</p>
</li>
</ul>
<p>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 <code>#set!</code> declaration anywhere in the pattern:</p>
<pre><code class="language-scm">(assignment_expression
right: (_) @indent
(#set! &quot;scope&quot; &quot;all&quot;))
</code></pre>
<h2 id="capture-types"><a class="header" href="#capture-types">Capture types</a></h2>
<ul>
<li>
<p><code>@indent</code> (default scope <code>tail</code>):
Increase the indent level by 1. Multiple occurrences in the same line
don't stack. If there is at least one <code>@indent</code> and one <code>@outdent</code>
capture on the same line, the indent level isn't changed at all.</p>
</li>
<li>
<p><code>@outdent</code> (default scope <code>all</code>):
Decrease the indent level by 1. The same rules as for <code>@indent</code> apply.</p>
</li>
<li>
<p><code>@extend</code>:
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.</p>
</li>
<li>
<p><code>@extend.prevent-once</code>:
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 <code>@extend</code> 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).</p>
</li>
</ul>
<h2 id="predicates"><a class="header" href="#predicates">Predicates</a></h2>
<p>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 <code>#set!</code> declarations work:</p>
<pre><code class="language-scm">(some_kind
(child_kind) @indent
(#predicate? arg1 arg2 ...)
)
</code></pre>
<p>The number of arguments depends on the predicate that's used.
Each argument is either a capture (<code>@name</code>) or a string (<code>&quot;some string&quot;</code>).
The following predicates are supported by tree-sitter:</p>
<ul>
<li>
<p><code>#eq?</code>/<code>#not-eq?</code>:
The first argument (a capture) must/must not be equal to the second argument
(a capture or a string).</p>
</li>
<li>
<p><code>#match?</code>/<code>#not-match?</code>:
The first argument (a capture) must/must not match the regex given in the
second argument (a string).</p>
</li>
</ul>
<p>Additionally, we support some custom predicates for indent queries:</p>
<ul>
<li>
<p><code>#not-kind-eq?</code>:
The kind of the first argument (a capture) must not be equal to the second
argument (a string).</p>
</li>
<li>
<p><code>#same-line?</code>/<code>#not-same-line?</code>:
The captures given by the 2 arguments must/must not start on the same line.</p>
</li>
</ul>
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<h1 id="adding-injection-queries"><a class="header" href="#adding-injection-queries">Adding Injection Queries</a></h1>
<p>Writing language injection queries allows one to highlight a specific node as a different language.
In addition to the <a href="upstream-docs">standard</a> language injection options used by tree-sitter, there
are a few Helix specific extensions that allow for more control.</p>
<p>And example of a simple query that would highlight all strings as bash in Nix:</p>
<pre><code class="language-scm">((string_expression (string_fragment) @injection.content)
(#set! injection.language &quot;bash&quot;))
</code></pre>
<h2 id="capture-types"><a class="header" href="#capture-types">Capture Types</a></h2>
<ul>
<li>
<p><code>@injection.language</code> (standard):
The captured node may contain the language name used to highlight the node captured by
<code>@injection.content</code>.</p>
</li>
<li>
<p><code>@injection.content</code> (standard):
Marks the content to be highlighted as the language captured with <code>@injection.language</code> <em>et al</em>.</p>
</li>
<li>
<p><code>@injection.filename</code> (extension):
The captured node may contain a filename with a file-extension known to Helix,
highlighting <code>@injection.content</code> as that language. This uses the language extensions defined in
both the default languages.toml distributed with Helix, as well as user defined languages.</p>
</li>
<li>
<p><code>@injection.shebang</code> (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 <code>languages.toml</code>.</p>
</li>
</ul>
<h2 id="settings"><a class="header" href="#settings">Settings</a></h2>
<ul>
<li>
<p><code>injection.combined</code> (standard):
Indicates that all the matching nodes in the tree should have their content parsed as one
nested document.</p>
</li>
<li>
<p><code>injection.language</code> (standard):
Forces the captured content to be highlighted as the given language</p>
</li>
<li>
<p><code>injection.include-children</code> (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.</p>
</li>
<li>
<p><code>injection.include-unnamed-children</code> (extension):
Same as <code>injection.include-children</code> but only for unnamed child nodes.</p>
</li>
</ul>
<h2 id="predicates"><a class="header" href="#predicates">Predicates</a></h2>
<ul>
<li>
<p><code>#eq?</code> (standard):
The first argument (a capture) must be equal to the second argument
(a capture or a string).</p>
</li>
<li>
<p><code>#match?</code> (standard):
The first argument (a capture) must match the regex given in the
second argument (a string).</p>
</li>
</ul>
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<h1 id="adding-textobject-queries"><a class="header" href="#adding-textobject-queries">Adding textobject queries</a></h1>
<p>Helix supports textobjects that are language specific, such as functions, classes, etc.
These textobjects require an accompanying tree-sitter grammar and a <code>textobjects.scm</code> query file
to work properly. Tree-sitter allows us to query the source code syntax tree
and capture specific parts of it. The queries are written in a lisp dialect.
More information on how to write queries can be found in the <a href="https://tree-sitter.github.io/tree-sitter/using-parsers#query-syntax">official tree-sitter
documentation</a>.</p>
<p>Query files should be placed in <code>runtime/queries/{language}/textobjects.scm</code>
when contributing to Helix. Note that to test the query files locally you should put
them under your local runtime directory (<code>~/.config/helix/runtime</code> on Linux
for example).</p>
<p>The following <a href="https://tree-sitter.github.io/tree-sitter/using-parsers#capturing-nodes">captures</a> are recognized:</p>
<div class="table-wrapper"><table><thead><tr><th>Capture Name</th></tr></thead><tbody>
<tr><td><code>function.inside</code></td></tr>
<tr><td><code>function.around</code></td></tr>
<tr><td><code>class.inside</code></td></tr>
<tr><td><code>class.around</code></td></tr>
<tr><td><code>test.inside</code></td></tr>
<tr><td><code>test.around</code></td></tr>
<tr><td><code>parameter.inside</code></td></tr>
<tr><td><code>comment.inside</code></td></tr>
<tr><td><code>comment.around</code></td></tr>
</tbody></table>
</div>
<p><a href="https://github.com/search?q=repo%3Ahelix-editor%2Fhelix+filename%3Atextobjects.scm&amp;type=Code&amp;ref=advsearch&amp;l=&amp;l=">Example query files</a> can be found in the helix GitHub repository.</p>
<h2 id="queries-for-textobject-based-navigation"><a class="header" href="#queries-for-textobject-based-navigation">Queries for textobject based navigation</a></h2>
<p>Tree-sitter based navigation in Helix is done using captures in the
following order:</p>
<ul>
<li><code>object.movement</code></li>
<li><code>object.around</code></li>
<li><code>object.inside</code></li>
</ul>
<p>For example if a <code>function.around</code> capture has been already defined for a language
in its <code>textobjects.scm</code> file, function navigation should also work automatically.
<code>function.movement</code> should be defined only if the node captured by <code>function.around</code>
doesn't make sense in a navigation context.</p>
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html" class="active"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="installing-helix"><a class="header" href="#installing-helix">Installing Helix</a></h1>
<!--toc:start-->
<ul>
<li><a href="#pre-built-binaries">Pre-built binaries</a></li>
<li><a href="#linux-macos-windows-and-openbsd-packaging-status">Linux, macOS, Windows and OpenBSD packaging status</a></li>
<li><a href="#linux">Linux</a>
<ul>
<li><a href="#ubuntu">Ubuntu</a></li>
<li><a href="#fedorarhel">Fedora/RHEL</a></li>
<li><a href="#arch-linux-community">Arch Linux community</a></li>
<li><a href="#nixos">NixOS</a></li>
<li><a href="#flatpak">Flatpak</a></li>
<li><a href="#appimage">AppImage</a></li>
</ul>
</li>
<li><a href="#macos">macOS</a>
<ul>
<li><a href="#homebrew-core">Homebrew Core</a></li>
</ul>
</li>
<li><a href="#windows">Windows</a>
<ul>
<li><a href="#winget">Winget</a></li>
<li><a href="#scoop">Scoop</a></li>
<li><a href="#chocolatey">Chocolatey</a></li>
<li><a href="#msys2">MSYS2</a></li>
</ul>
</li>
<li><a href="#building-from-source">Building from source</a>
<ul>
<li><a href="#configuring-helixs-runtime-files">Configuring Helix's runtime files</a>
<ul>
<li><a href="#linux-and-macos">Linux and macOS</a></li>
<li><a href="#windows">Windows</a></li>
<li><a href="#multiple-runtime-directories">Multiple runtime directories</a></li>
</ul>
</li>
<li><a href="#validating-the-installation">Validating the installation</a></li>
<li><a href="#configure-the-desktop-shortcut">Configure the desktop shortcut</a></li>
</ul>
</li>
</ul>
<!--toc:end-->
<p>To install Helix, follow the instructions specific to your operating system.
Note that:</p>
<ul>
<li>
<p>To get the latest nightly version of Helix, you need to
<a href="#building-from-source">build from source</a>.</p>
</li>
<li>
<p>To take full advantage of Helix, install the language servers for your
preferred programming languages. See the
<a href="https://github.com/helix-editor/helix/wiki/How-to-install-the-default-language-servers">wiki</a>
for instructions.</p>
</li>
</ul>
<h2 id="pre-built-binaries"><a class="header" href="#pre-built-binaries">Pre-built binaries</a></h2>
<p>Download pre-built binaries from the
<a href="https://github.com/helix-editor/helix/releases">GitHub Releases page</a>. Add the binary to your system's <code>$PATH</code> to use it from the command
line.</p>
<h2 id="linux-macos-windows-and-openbsd-packaging-status"><a class="header" href="#linux-macos-windows-and-openbsd-packaging-status">Linux, macOS, Windows and OpenBSD packaging status</a></h2>
<p><a href="https://repology.org/project/helix/versions"><img src="https://repology.org/badge/vertical-allrepos/helix.svg" alt="Packaging status" /></a></p>
<h2 id="linux"><a class="header" href="#linux">Linux</a></h2>
<p>The following third party repositories are available:</p>
<h3 id="ubuntu"><a class="header" href="#ubuntu">Ubuntu</a></h3>
<p>Add the <code>PPA</code> for Helix:</p>
<pre><code class="language-sh">sudo add-apt-repository ppa:maveonair/helix-editor
sudo apt update
sudo apt install helix
</code></pre>
<h3 id="fedorarhel"><a class="header" href="#fedorarhel">Fedora/RHEL</a></h3>
<p>Enable the <code>COPR</code> repository for Helix:</p>
<pre><code class="language-sh">sudo dnf copr enable varlad/helix
sudo dnf install helix
</code></pre>
<h3 id="arch-linux-community"><a class="header" href="#arch-linux-community">Arch Linux community</a></h3>
<p>Releases are available in the <code>community</code> repository:</p>
<pre><code class="language-sh">sudo pacman -S helix
</code></pre>
<p>Additionally, a <a href="https://aur.archlinux.org/packages/helix-git/">helix-git</a> package is available
in the AUR, which builds the master branch.</p>
<h3 id="nixos"><a class="header" href="#nixos">NixOS</a></h3>
<p>Helix is available as a <a href="https://nixos.wiki/wiki/Flakes">flake</a> in the project
root. Use <code>nix develop</code> to spin up a reproducible development shell. Outputs are
cached for each push to master using <a href="https://www.cachix.org/">Cachix</a>. The
flake is configured to automatically make use of this cache assuming the user
accepts the new settings on first use.</p>
<p>If you are using a version of Nix without flakes enabled,
<a href="https://docs.cachix.org/installation">install Cachix CLI</a> and use
<code>cachix use helix</code> to configure Nix to use cached outputs when possible.</p>
<h3 id="flatpak"><a class="header" href="#flatpak">Flatpak</a></h3>
<p>Helix is available on <a href="https://flathub.org/en-GB/apps/com.helix_editor.Helix">Flathub</a>:</p>
<pre><code class="language-sh">flatpak install flathub com.helix_editor.Helix
flatpak run com.helix_editor.Helix
</code></pre>
<h3 id="appimage"><a class="header" href="#appimage">AppImage</a></h3>
<p>Install Helix using the Linux <a href="https://appimage.org/">AppImage</a> format.
Download the official Helix AppImage from the <a href="https://github.com/helix-editor/helix/releases/latest">latest releases</a> page.</p>
<pre><code class="language-sh">chmod +x helix-*.AppImage # change permission for executable mode
./helix-*.AppImage # run helix
</code></pre>
<h2 id="macos"><a class="header" href="#macos">macOS</a></h2>
<h3 id="homebrew-core"><a class="header" href="#homebrew-core">Homebrew Core</a></h3>
<pre><code class="language-sh">brew install helix
</code></pre>
<h2 id="windows"><a class="header" href="#windows">Windows</a></h2>
<p>Install on Windows using <a href="https://learn.microsoft.com/en-us/windows/package-manager/winget/">Winget</a>, <a href="https://scoop.sh/">Scoop</a>, <a href="https://chocolatey.org/">Chocolatey</a>
or <a href="https://msys2.org/">MSYS2</a>.</p>
<h3 id="winget"><a class="header" href="#winget">Winget</a></h3>
<p>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 <a href="https://www.microsoft.com/p/app-installer/9nblggh4nns1#activetab=pivot:overviewtab">App Installer from the Microsoft Store</a>. If it's already installed, make sure it is updated with the latest version.</p>
<pre><code class="language-sh">winget install Helix.Helix
</code></pre>
<h3 id="scoop"><a class="header" href="#scoop">Scoop</a></h3>
<pre><code class="language-sh">scoop install helix
</code></pre>
<h3 id="chocolatey"><a class="header" href="#chocolatey">Chocolatey</a></h3>
<pre><code class="language-sh">choco install helix
</code></pre>
<h3 id="msys2"><a class="header" href="#msys2">MSYS2</a></h3>
<p>For 64-bit Windows 8.1 or above:</p>
<pre><code class="language-sh">pacman -S mingw-w64-ucrt-x86_64-helix
</code></pre>
<h2 id="building-from-source"><a class="header" href="#building-from-source">Building from source</a></h2>
<p>Requirements:</p>
<ul>
<li>The <a href="https://www.rust-lang.org/tools/install">Rust toolchain</a></li>
<li>The <a href="https://git-scm.com/">Git version control system</a></li>
<li>A c++14 compatible compiler to build the tree-sitter grammars, for example GCC or Clang</li>
</ul>
<p>If you are using the <code>musl-libc</code> standard library instead of <code>glibc</code> the following environment variable must be set during the build to ensure tree-sitter grammars can be loaded correctly:</p>
<pre><code class="language-sh">RUSTFLAGS=&quot;-C target-feature=-crt-static&quot;
</code></pre>
<ol>
<li>Clone the repository:</li>
</ol>
<pre><code class="language-sh">git clone https://github.com/helix-editor/helix
cd helix
</code></pre>
<ol start="2">
<li>Compile from source:</li>
</ol>
<pre><code class="language-sh">cargo install --path helix-term --locked
</code></pre>
<p>This command will create the <code>hx</code> executable and construct the tree-sitter
grammars in the local <code>runtime</code> folder.</p>
<blockquote>
<p>💡 Tree-sitter grammars can be fetched and compiled if not pre-packaged. Fetch
grammars with <code>hx --grammar fetch</code> and compile them with
<code>hx --grammar build</code>. This will install them in
the <code>runtime</code> directory within the user's helix config directory (more
<a href="#multiple-runtime-directories">details below</a>).</p>
</blockquote>
<h3 id="configuring-helixs-runtime-files"><a class="header" href="#configuring-helixs-runtime-files">Configuring Helix's runtime files</a></h3>
<h4 id="linux-and-macos"><a class="header" href="#linux-and-macos">Linux and macOS</a></h4>
<p>Either set the <code>HELIX_RUNTIME</code> environment variable to point to the runtime files and add it to your <code>~/.bashrc</code> or equivalent:</p>
<pre><code class="language-sh">HELIX_RUNTIME=/home/user-name/src/helix/runtime
</code></pre>
<p>Or, create a symlink in <code>~/.config/helix</code> that links to the source code directory:</p>
<pre><code class="language-sh">ln -s $PWD/runtime ~/.config/helix/runtime
</code></pre>
<h4 id="windows-1"><a class="header" href="#windows-1">Windows</a></h4>
<p>Either set the <code>HELIX_RUNTIME</code> environment variable to point to the runtime files using the Windows setting (search for
<code>Edit environment variables for your account</code>) or use the <code>setx</code> command in
Cmd:</p>
<pre><code class="language-sh">setx HELIX_RUNTIME &quot;%userprofile%\source\repos\helix\runtime&quot;
</code></pre>
<blockquote>
<p>💡 <code>%userprofile%</code> resolves to your user directory like
<code>C:\Users\Your-Name\</code> for example.</p>
</blockquote>
<p>Or, create a symlink in <code>%appdata%\helix\</code> that links to the source code directory:</p>
<div class="table-wrapper"><table><thead><tr><th>Method</th><th>Command</th></tr></thead><tbody>
<tr><td>PowerShell</td><td><code>New-Item -ItemType Junction -Target &quot;runtime&quot; -Path &quot;$Env:AppData\helix\runtime&quot;</code></td></tr>
<tr><td>Cmd</td><td><code>cd %appdata%\helix</code> <br/> <code>mklink /D runtime &quot;%userprofile%\src\helix\runtime&quot;</code></td></tr>
</tbody></table>
</div>
<blockquote>
<p>💡 On Windows, creating a symbolic link may require running PowerShell or
Cmd as an administrator.</p>
</blockquote>
<h4 id="multiple-runtime-directories"><a class="header" href="#multiple-runtime-directories">Multiple runtime directories</a></h4>
<p>When Helix finds multiple runtime directories it will search through them for files in the
following order:</p>
<ol>
<li><code>runtime/</code> sibling directory to <code>$CARGO_MANIFEST_DIR</code> directory (this is intended for
developing and testing helix only).</li>
<li><code>runtime/</code> subdirectory of OS-dependent helix user config directory.</li>
<li><code>$HELIX_RUNTIME</code>.</li>
<li><code>runtime/</code> subdirectory of path to Helix executable.</li>
</ol>
<p>This order also sets the priority for selecting which file will be used if multiple runtime
directories have files with the same name.</p>
<h3 id="validating-the-installation"><a class="header" href="#validating-the-installation">Validating the installation</a></h3>
<p>To make sure everything is set up as expected you should run the Helix health
check:</p>
<pre><code class="language-sh">hx --health
</code></pre>
<p>For more information on the health check results refer to
<a href="https://github.com/helix-editor/helix/wiki/Healthcheck">Health check</a>.</p>
<h3 id="configure-the-desktop-shortcut"><a class="header" href="#configure-the-desktop-shortcut">Configure the desktop shortcut</a></h3>
<p>If your desktop environment supports the
<a href="https://specifications.freedesktop.org/menu-spec/menu-spec-latest.html">XDG desktop menu</a>
you can configure Helix to show up in the application menu by copying the
provided <code>.desktop</code> and icon files to their correct folders:</p>
<pre><code class="language-sh">cp contrib/Helix.desktop ~/.local/share/applications
cp contrib/helix.png ~/.icons # or ~/.local/share/icons
</code></pre>
<p>To use another terminal than the system default, you can modify the <code>.desktop</code>
file. For example, to use <code>kitty</code>:</p>
<pre><code class="language-sh">sed -i &quot;s|Exec=hx %F|Exec=kitty hx %F|g&quot; ~/.local/share/applications/Helix.desktop
sed -i &quot;s|Terminal=true|Terminal=false|g&quot; ~/.local/share/applications/Helix.desktop
</code></pre>
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html" class="active"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="keymap"><a class="header" href="#keymap">Keymap</a></h1>
<ul>
<li><a href="#normal-mode">Normal mode</a>
<ul>
<li><a href="#movement">Movement</a></li>
<li><a href="#changes">Changes</a>
<ul>
<li><a href="#shell">Shell</a></li>
</ul>
</li>
<li><a href="#selection-manipulation">Selection manipulation</a></li>
<li><a href="#search">Search</a></li>
<li><a href="#minor-modes">Minor modes</a>
<ul>
<li><a href="#view-mode">View mode</a></li>
<li><a href="#goto-mode">Goto mode</a></li>
<li><a href="#match-mode">Match mode</a></li>
<li><a href="#window-mode">Window mode</a></li>
<li><a href="#space-mode">Space mode</a>
<ul>
<li><a href="#popup">Popup</a></li>
</ul>
</li>
<li><a href="#unimpaired">Unimpaired</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#insert-mode">Insert mode</a></li>
<li><a href="#select--extend-mode">Select / extend mode</a></li>
<li><a href="#picker">Picker</a></li>
<li><a href="#prompt">Prompt</a></li>
</ul>
<blockquote>
<p>💡 Mappings marked (<strong>LSP</strong>) require an active language server for the file.</p>
</blockquote>
<blockquote>
<p>💡 Mappings marked (<strong>TS</strong>) require a tree-sitter grammar for the file type.</p>
</blockquote>
<h2 id="normal-mode"><a class="header" href="#normal-mode">Normal mode</a></h2>
<h3 id="movement"><a class="header" href="#movement">Movement</a></h3>
<blockquote>
<p>NOTE: Unlike Vim, <code>f</code>, <code>F</code>, <code>t</code> and <code>T</code> are not confined to the current line.</p>
</blockquote>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>h</code>, <code>Left</code></td><td>Move left</td><td><code>move_char_left</code></td></tr>
<tr><td><code>j</code>, <code>Down</code></td><td>Move down</td><td><code>move_visual_line_down</code></td></tr>
<tr><td><code>k</code>, <code>Up</code></td><td>Move up</td><td><code>move_visual_line_up</code></td></tr>
<tr><td><code>l</code>, <code>Right</code></td><td>Move right</td><td><code>move_char_right</code></td></tr>
<tr><td><code>w</code></td><td>Move next word start</td><td><code>move_next_word_start</code></td></tr>
<tr><td><code>b</code></td><td>Move previous word start</td><td><code>move_prev_word_start</code></td></tr>
<tr><td><code>e</code></td><td>Move next word end</td><td><code>move_next_word_end</code></td></tr>
<tr><td><code>W</code></td><td>Move next WORD start</td><td><code>move_next_long_word_start</code></td></tr>
<tr><td><code>B</code></td><td>Move previous WORD start</td><td><code>move_prev_long_word_start</code></td></tr>
<tr><td><code>E</code></td><td>Move next WORD end</td><td><code>move_next_long_word_end</code></td></tr>
<tr><td><code>t</code></td><td>Find 'till next char</td><td><code>find_till_char</code></td></tr>
<tr><td><code>f</code></td><td>Find next char</td><td><code>find_next_char</code></td></tr>
<tr><td><code>T</code></td><td>Find 'till previous char</td><td><code>till_prev_char</code></td></tr>
<tr><td><code>F</code></td><td>Find previous char</td><td><code>find_prev_char</code></td></tr>
<tr><td><code>G</code></td><td>Go to line number <code>&lt;n&gt;</code></td><td><code>goto_line</code></td></tr>
<tr><td><code>Alt-.</code></td><td>Repeat last motion (<code>f</code>, <code>t</code> or <code>m</code>)</td><td><code>repeat_last_motion</code></td></tr>
<tr><td><code>Home</code></td><td>Move to the start of the line</td><td><code>goto_line_start</code></td></tr>
<tr><td><code>End</code></td><td>Move to the end of the line</td><td><code>goto_line_end</code></td></tr>
<tr><td><code>Ctrl-b</code>, <code>PageUp</code></td><td>Move page up</td><td><code>page_up</code></td></tr>
<tr><td><code>Ctrl-f</code>, <code>PageDown</code></td><td>Move page down</td><td><code>page_down</code></td></tr>
<tr><td><code>Ctrl-u</code></td><td>Move half page up</td><td><code>half_page_up</code></td></tr>
<tr><td><code>Ctrl-d</code></td><td>Move half page down</td><td><code>half_page_down</code></td></tr>
<tr><td><code>Ctrl-i</code></td><td>Jump forward on the jumplist</td><td><code>jump_forward</code></td></tr>
<tr><td><code>Ctrl-o</code></td><td>Jump backward on the jumplist</td><td><code>jump_backward</code></td></tr>
<tr><td><code>Ctrl-s</code></td><td>Save the current selection to the jumplist</td><td><code>save_selection</code></td></tr>
</tbody></table>
</div>
<h3 id="changes"><a class="header" href="#changes">Changes</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>r</code></td><td>Replace with a character</td><td><code>replace</code></td></tr>
<tr><td><code>R</code></td><td>Replace with yanked text</td><td><code>replace_with_yanked</code></td></tr>
<tr><td><code>~</code></td><td>Switch case of the selected text</td><td><code>switch_case</code></td></tr>
<tr><td><code>`</code></td><td>Set the selected text to lower case</td><td><code>switch_to_lowercase</code></td></tr>
<tr><td><code>Alt-`</code></td><td>Set the selected text to upper case</td><td><code>switch_to_uppercase</code></td></tr>
<tr><td><code>i</code></td><td>Insert before selection</td><td><code>insert_mode</code></td></tr>
<tr><td><code>a</code></td><td>Insert after selection (append)</td><td><code>append_mode</code></td></tr>
<tr><td><code>I</code></td><td>Insert at the start of the line</td><td><code>insert_at_line_start</code></td></tr>
<tr><td><code>A</code></td><td>Insert at the end of the line</td><td><code>insert_at_line_end</code></td></tr>
<tr><td><code>o</code></td><td>Open new line below selection</td><td><code>open_below</code></td></tr>
<tr><td><code>O</code></td><td>Open new line above selection</td><td><code>open_above</code></td></tr>
<tr><td><code>.</code></td><td>Repeat last insert</td><td>N/A</td></tr>
<tr><td><code>u</code></td><td>Undo change</td><td><code>undo</code></td></tr>
<tr><td><code>U</code></td><td>Redo change</td><td><code>redo</code></td></tr>
<tr><td><code>Alt-u</code></td><td>Move backward in history</td><td><code>earlier</code></td></tr>
<tr><td><code>Alt-U</code></td><td>Move forward in history</td><td><code>later</code></td></tr>
<tr><td><code>y</code></td><td>Yank selection</td><td><code>yank</code></td></tr>
<tr><td><code>p</code></td><td>Paste after selection</td><td><code>paste_after</code></td></tr>
<tr><td><code>P</code></td><td>Paste before selection</td><td><code>paste_before</code></td></tr>
<tr><td><code>&quot;</code> <code>&lt;reg&gt;</code></td><td>Select a register to yank to or paste from</td><td><code>select_register</code></td></tr>
<tr><td><code>&gt;</code></td><td>Indent selection</td><td><code>indent</code></td></tr>
<tr><td><code>&lt;</code></td><td>Unindent selection</td><td><code>unindent</code></td></tr>
<tr><td><code>=</code></td><td>Format selection (currently nonfunctional/disabled) (<strong>LSP</strong>)</td><td><code>format_selections</code></td></tr>
<tr><td><code>d</code></td><td>Delete selection</td><td><code>delete_selection</code></td></tr>
<tr><td><code>Alt-d</code></td><td>Delete selection, without yanking</td><td><code>delete_selection_noyank</code></td></tr>
<tr><td><code>c</code></td><td>Change selection (delete and enter insert mode)</td><td><code>change_selection</code></td></tr>
<tr><td><code>Alt-c</code></td><td>Change selection (delete and enter insert mode, without yanking)</td><td><code>change_selection_noyank</code></td></tr>
<tr><td><code>Ctrl-a</code></td><td>Increment object (number) under cursor</td><td><code>increment</code></td></tr>
<tr><td><code>Ctrl-x</code></td><td>Decrement object (number) under cursor</td><td><code>decrement</code></td></tr>
<tr><td><code>Q</code></td><td>Start/stop macro recording to the selected register (experimental)</td><td><code>record_macro</code></td></tr>
<tr><td><code>q</code></td><td>Play back a recorded macro from the selected register (experimental)</td><td><code>replay_macro</code></td></tr>
</tbody></table>
</div>
<h4 id="shell"><a class="header" href="#shell">Shell</a></h4>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>|</code></td><td>Pipe each selection through shell command, replacing with output</td><td><code>shell_pipe</code></td></tr>
<tr><td><code>Alt-|</code></td><td>Pipe each selection into shell command, ignoring output</td><td><code>shell_pipe_to</code></td></tr>
<tr><td><code>!</code></td><td>Run shell command, inserting output before each selection</td><td><code>shell_insert_output</code></td></tr>
<tr><td><code>Alt-!</code></td><td>Run shell command, appending output after each selection</td><td><code>shell_append_output</code></td></tr>
<tr><td><code>$</code></td><td>Pipe each selection into shell command, keep selections where command returned 0</td><td><code>shell_keep_pipe</code></td></tr>
</tbody></table>
</div>
<h3 id="selection-manipulation"><a class="header" href="#selection-manipulation">Selection manipulation</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>s</code></td><td>Select all regex matches inside selections</td><td><code>select_regex</code></td></tr>
<tr><td><code>S</code></td><td>Split selection into sub selections on regex matches</td><td><code>split_selection</code></td></tr>
<tr><td><code>Alt-s</code></td><td>Split selection on newlines</td><td><code>split_selection_on_newline</code></td></tr>
<tr><td><code>Alt-_ </code></td><td>Merge consecutive selections</td><td><code>merge_consecutive_selections</code></td></tr>
<tr><td><code>&amp;</code></td><td>Align selection in columns</td><td><code>align_selections</code></td></tr>
<tr><td><code>_</code></td><td>Trim whitespace from the selection</td><td><code>trim_selections</code></td></tr>
<tr><td><code>;</code></td><td>Collapse selection onto a single cursor</td><td><code>collapse_selection</code></td></tr>
<tr><td><code>Alt-;</code></td><td>Flip selection cursor and anchor</td><td><code>flip_selections</code></td></tr>
<tr><td><code>Alt-:</code></td><td>Ensures the selection is in forward direction</td><td><code>ensure_selections_forward</code></td></tr>
<tr><td><code>,</code></td><td>Keep only the primary selection</td><td><code>keep_primary_selection</code></td></tr>
<tr><td><code>Alt-,</code></td><td>Remove the primary selection</td><td><code>remove_primary_selection</code></td></tr>
<tr><td><code>C</code></td><td>Copy selection onto the next line (Add cursor below)</td><td><code>copy_selection_on_next_line</code></td></tr>
<tr><td><code>Alt-C</code></td><td>Copy selection onto the previous line (Add cursor above)</td><td><code>copy_selection_on_prev_line</code></td></tr>
<tr><td><code>(</code></td><td>Rotate main selection backward</td><td><code>rotate_selections_backward</code></td></tr>
<tr><td><code>)</code></td><td>Rotate main selection forward</td><td><code>rotate_selections_forward</code></td></tr>
<tr><td><code>Alt-(</code></td><td>Rotate selection contents backward</td><td><code>rotate_selection_contents_backward</code></td></tr>
<tr><td><code>Alt-)</code></td><td>Rotate selection contents forward</td><td><code>rotate_selection_contents_forward</code></td></tr>
<tr><td><code>%</code></td><td>Select entire file</td><td><code>select_all</code></td></tr>
<tr><td><code>x</code></td><td>Select current line, if already selected, extend to next line</td><td><code>extend_line_below</code></td></tr>
<tr><td><code>X</code></td><td>Extend selection to line bounds (line-wise selection)</td><td><code>extend_to_line_bounds</code></td></tr>
<tr><td><code>Alt-x</code></td><td>Shrink selection to line bounds (line-wise selection)</td><td><code>shrink_to_line_bounds</code></td></tr>
<tr><td><code>J</code></td><td>Join lines inside selection</td><td><code>join_selections</code></td></tr>
<tr><td><code>Alt-J</code></td><td>Join lines inside selection and select the inserted space</td><td><code>join_selections_space</code></td></tr>
<tr><td><code>K</code></td><td>Keep selections matching the regex</td><td><code>keep_selections</code></td></tr>
<tr><td><code>Alt-K</code></td><td>Remove selections matching the regex</td><td><code>remove_selections</code></td></tr>
<tr><td><code>Ctrl-c</code></td><td>Comment/uncomment the selections</td><td><code>toggle_comments</code></td></tr>
<tr><td><code>Alt-o</code>, <code>Alt-up</code></td><td>Expand selection to parent syntax node (<strong>TS</strong>)</td><td><code>expand_selection</code></td></tr>
<tr><td><code>Alt-i</code>, <code>Alt-down</code></td><td>Shrink syntax tree object selection (<strong>TS</strong>)</td><td><code>shrink_selection</code></td></tr>
<tr><td><code>Alt-p</code>, <code>Alt-left</code></td><td>Select previous sibling node in syntax tree (<strong>TS</strong>)</td><td><code>select_prev_sibling</code></td></tr>
<tr><td><code>Alt-n</code>, <code>Alt-right</code></td><td>Select next sibling node in syntax tree (<strong>TS</strong>)</td><td><code>select_next_sibling</code></td></tr>
</tbody></table>
</div>
<h3 id="search"><a class="header" href="#search">Search</a></h3>
<p>Search commands all operate on the <code>/</code> register by default. To use a different register, use <code>&quot;&lt;char&gt;</code>.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>/</code></td><td>Search for regex pattern</td><td><code>search</code></td></tr>
<tr><td><code>?</code></td><td>Search for previous pattern</td><td><code>rsearch</code></td></tr>
<tr><td><code>n</code></td><td>Select next search match</td><td><code>search_next</code></td></tr>
<tr><td><code>N</code></td><td>Select previous search match</td><td><code>search_prev</code></td></tr>
<tr><td><code>*</code></td><td>Use current selection as the search pattern</td><td><code>search_selection</code></td></tr>
</tbody></table>
</div>
<h3 id="minor-modes"><a class="header" href="#minor-modes">Minor modes</a></h3>
<p>These sub-modes are accessible from normal mode and typically switch back to normal mode after a command.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>v</code></td><td>Enter <a href="#select--extend-mode">select (extend) mode</a></td><td><code>select_mode</code></td></tr>
<tr><td><code>g</code></td><td>Enter <a href="#goto-mode">goto mode</a></td><td>N/A</td></tr>
<tr><td><code>m</code></td><td>Enter <a href="#match-mode">match mode</a></td><td>N/A</td></tr>
<tr><td><code>:</code></td><td>Enter command mode</td><td><code>command_mode</code></td></tr>
<tr><td><code>z</code></td><td>Enter <a href="#view-mode">view mode</a></td><td>N/A</td></tr>
<tr><td><code>Z</code></td><td>Enter sticky <a href="#view-mode">view mode</a></td><td>N/A</td></tr>
<tr><td><code>Ctrl-w</code></td><td>Enter <a href="#window-mode">window mode</a></td><td>N/A</td></tr>
<tr><td><code>Space</code></td><td>Enter <a href="#space-mode">space mode</a></td><td>N/A</td></tr>
</tbody></table>
</div>
<p>These modes (except command mode) can be configured by
<a href="https://docs.helix-editor.com/remapping.html#minor-modes">remapping keys</a>.</p>
<h4 id="view-mode"><a class="header" href="#view-mode">View mode</a></h4>
<p>Accessed by typing <code>z</code> in <a href="#normal-mode">normal mode</a>.</p>
<p>View mode is intended for scrolling and manipulating the view without changing
the selection. The &quot;sticky&quot; variant of this mode (accessed by typing <code>Z</code> in
normal mode) is persistent and can be exited using the escape key. This is
useful when you're simply looking over text and not actively editing it.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>z</code>, <code>c</code></td><td>Vertically center the line</td><td><code>align_view_center</code></td></tr>
<tr><td><code>t</code></td><td>Align the line to the top of the screen</td><td><code>align_view_top</code></td></tr>
<tr><td><code>b</code></td><td>Align the line to the bottom of the screen</td><td><code>align_view_bottom</code></td></tr>
<tr><td><code>m</code></td><td>Align the line to the middle of the screen (horizontally)</td><td><code>align_view_middle</code></td></tr>
<tr><td><code>j</code>, <code>down</code></td><td>Scroll the view downwards</td><td><code>scroll_down</code></td></tr>
<tr><td><code>k</code>, <code>up</code></td><td>Scroll the view upwards</td><td><code>scroll_up</code></td></tr>
<tr><td><code>Ctrl-f</code>, <code>PageDown</code></td><td>Move page down</td><td><code>page_down</code></td></tr>
<tr><td><code>Ctrl-b</code>, <code>PageUp</code></td><td>Move page up</td><td><code>page_up</code></td></tr>
<tr><td><code>Ctrl-d</code></td><td>Move half page down</td><td><code>half_page_down</code></td></tr>
<tr><td><code>Ctrl-u</code></td><td>Move half page up</td><td><code>half_page_up</code></td></tr>
</tbody></table>
</div>
<h4 id="goto-mode"><a class="header" href="#goto-mode">Goto mode</a></h4>
<p>Accessed by typing <code>g</code> in <a href="#normal-mode">normal mode</a>.</p>
<p>Jumps to various locations.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>g</code></td><td>Go to line number <code>&lt;n&gt;</code> else start of file</td><td><code>goto_file_start</code></td></tr>
<tr><td><code>e</code></td><td>Go to the end of the file</td><td><code>goto_last_line</code></td></tr>
<tr><td><code>f</code></td><td>Go to files in the selection</td><td><code>goto_file</code></td></tr>
<tr><td><code>h</code></td><td>Go to the start of the line</td><td><code>goto_line_start</code></td></tr>
<tr><td><code>l</code></td><td>Go to the end of the line</td><td><code>goto_line_end</code></td></tr>
<tr><td><code>s</code></td><td>Go to first non-whitespace character of the line</td><td><code>goto_first_nonwhitespace</code></td></tr>
<tr><td><code>t</code></td><td>Go to the top of the screen</td><td><code>goto_window_top</code></td></tr>
<tr><td><code>c</code></td><td>Go to the middle of the screen</td><td><code>goto_window_center</code></td></tr>
<tr><td><code>b</code></td><td>Go to the bottom of the screen</td><td><code>goto_window_bottom</code></td></tr>
<tr><td><code>d</code></td><td>Go to definition (<strong>LSP</strong>)</td><td><code>goto_definition</code></td></tr>
<tr><td><code>y</code></td><td>Go to type definition (<strong>LSP</strong>)</td><td><code>goto_type_definition</code></td></tr>
<tr><td><code>r</code></td><td>Go to references (<strong>LSP</strong>)</td><td><code>goto_reference</code></td></tr>
<tr><td><code>i</code></td><td>Go to implementation (<strong>LSP</strong>)</td><td><code>goto_implementation</code></td></tr>
<tr><td><code>a</code></td><td>Go to the last accessed/alternate file</td><td><code>goto_last_accessed_file</code></td></tr>
<tr><td><code>m</code></td><td>Go to the last modified/alternate file</td><td><code>goto_last_modified_file</code></td></tr>
<tr><td><code>n</code></td><td>Go to next buffer</td><td><code>goto_next_buffer</code></td></tr>
<tr><td><code>p</code></td><td>Go to previous buffer</td><td><code>goto_previous_buffer</code></td></tr>
<tr><td><code>.</code></td><td>Go to last modification in current file</td><td><code>goto_last_modification</code></td></tr>
<tr><td><code>j</code></td><td>Move down textual (instead of visual) line</td><td><code>move_line_down</code></td></tr>
<tr><td><code>k</code></td><td>Move up textual (instead of visual) line</td><td><code>move_line_up</code></td></tr>
</tbody></table>
</div>
<h4 id="match-mode"><a class="header" href="#match-mode">Match mode</a></h4>
<p>Accessed by typing <code>m</code> in <a href="#normal-mode">normal mode</a>.</p>
<p>See the relevant section in <a href="./usage.html">Usage</a> for an explanation about
<a href="./usage.html#surround">surround</a> and <a href="./usage.html#navigating-using-tree-sitter-textobjects">textobject</a> usage.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>m</code></td><td>Goto matching bracket (<strong>TS</strong>)</td><td><code>match_brackets</code></td></tr>
<tr><td><code>s</code> <code>&lt;char&gt;</code></td><td>Surround current selection with <code>&lt;char&gt;</code></td><td><code>surround_add</code></td></tr>
<tr><td><code>r</code> <code>&lt;from&gt;&lt;to&gt;</code></td><td>Replace surround character <code>&lt;from&gt;</code> with <code>&lt;to&gt;</code></td><td><code>surround_replace</code></td></tr>
<tr><td><code>d</code> <code>&lt;char&gt;</code></td><td>Delete surround character <code>&lt;char&gt;</code></td><td><code>surround_delete</code></td></tr>
<tr><td><code>a</code> <code>&lt;object&gt;</code></td><td>Select around textobject</td><td><code>select_textobject_around</code></td></tr>
<tr><td><code>i</code> <code>&lt;object&gt;</code></td><td>Select inside textobject</td><td><code>select_textobject_inner</code></td></tr>
</tbody></table>
</div>
<p>TODO: Mappings for selecting syntax nodes (a superset of <code>[</code>).</p>
<h4 id="window-mode"><a class="header" href="#window-mode">Window mode</a></h4>
<p>Accessed by typing <code>Ctrl-w</code> in <a href="#normal-mode">normal mode</a>.</p>
<p>This layer is similar to Vim keybindings as Kakoune does not support windows.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>w</code>, <code>Ctrl-w</code></td><td>Switch to next window</td><td><code>rotate_view</code></td></tr>
<tr><td><code>v</code>, <code>Ctrl-v</code></td><td>Vertical right split</td><td><code>vsplit</code></td></tr>
<tr><td><code>s</code>, <code>Ctrl-s</code></td><td>Horizontal bottom split</td><td><code>hsplit</code></td></tr>
<tr><td><code>f</code></td><td>Go to files in the selection in horizontal splits</td><td><code>goto_file</code></td></tr>
<tr><td><code>F</code></td><td>Go to files in the selection in vertical splits</td><td><code>goto_file</code></td></tr>
<tr><td><code>h</code>, <code>Ctrl-h</code>, <code>Left</code></td><td>Move to left split</td><td><code>jump_view_left</code></td></tr>
<tr><td><code>j</code>, <code>Ctrl-j</code>, <code>Down</code></td><td>Move to split below</td><td><code>jump_view_down</code></td></tr>
<tr><td><code>k</code>, <code>Ctrl-k</code>, <code>Up</code></td><td>Move to split above</td><td><code>jump_view_up</code></td></tr>
<tr><td><code>l</code>, <code>Ctrl-l</code>, <code>Right</code></td><td>Move to right split</td><td><code>jump_view_right</code></td></tr>
<tr><td><code>q</code>, <code>Ctrl-q</code></td><td>Close current window</td><td><code>wclose</code></td></tr>
<tr><td><code>o</code>, <code>Ctrl-o</code></td><td>Only keep the current window, closing all the others</td><td><code>wonly</code></td></tr>
<tr><td><code>H</code></td><td>Swap window to the left</td><td><code>swap_view_left</code></td></tr>
<tr><td><code>J</code></td><td>Swap window downwards</td><td><code>swap_view_down</code></td></tr>
<tr><td><code>K</code></td><td>Swap window upwards</td><td><code>swap_view_up</code></td></tr>
<tr><td><code>L</code></td><td>Swap window to the right</td><td><code>swap_view_right</code></td></tr>
</tbody></table>
</div>
<h4 id="space-mode"><a class="header" href="#space-mode">Space mode</a></h4>
<p>Accessed by typing <code>Space</code> in <a href="#normal-mode">normal mode</a>.</p>
<p>This layer is a kludge of mappings, mostly pickers.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>f</code></td><td>Open file picker</td><td><code>file_picker</code></td></tr>
<tr><td><code>F</code></td><td>Open file picker at current working directory</td><td><code>file_picker_in_current_directory</code></td></tr>
<tr><td><code>b</code></td><td>Open buffer picker</td><td><code>buffer_picker</code></td></tr>
<tr><td><code>j</code></td><td>Open jumplist picker</td><td><code>jumplist_picker</code></td></tr>
<tr><td><code>g</code></td><td>Debug (experimental)</td><td>N/A</td></tr>
<tr><td><code>k</code></td><td>Show documentation for item under cursor in a <a href="#popup">popup</a> (<strong>LSP</strong>)</td><td><code>hover</code></td></tr>
<tr><td><code>s</code></td><td>Open document symbol picker (<strong>LSP</strong>)</td><td><code>symbol_picker</code></td></tr>
<tr><td><code>S</code></td><td>Open workspace symbol picker (<strong>LSP</strong>)</td><td><code>workspace_symbol_picker</code></td></tr>
<tr><td><code>d</code></td><td>Open document diagnostics picker (<strong>LSP</strong>)</td><td><code>diagnostics_picker</code></td></tr>
<tr><td><code>D</code></td><td>Open workspace diagnostics picker (<strong>LSP</strong>)</td><td><code>workspace_diagnostics_picker</code></td></tr>
<tr><td><code>r</code></td><td>Rename symbol (<strong>LSP</strong>)</td><td><code>rename_symbol</code></td></tr>
<tr><td><code>a</code></td><td>Apply code action (<strong>LSP</strong>)</td><td><code>code_action</code></td></tr>
<tr><td><code>h</code></td><td>Select symbol references (<strong>LSP</strong>)</td><td><code>select_references_to_symbol_under_cursor</code></td></tr>
<tr><td><code>'</code></td><td>Open last fuzzy picker</td><td><code>last_picker</code></td></tr>
<tr><td><code>w</code></td><td>Enter <a href="#window-mode">window mode</a></td><td>N/A</td></tr>
<tr><td><code>p</code></td><td>Paste system clipboard after selections</td><td><code>paste_clipboard_after</code></td></tr>
<tr><td><code>P</code></td><td>Paste system clipboard before selections</td><td><code>paste_clipboard_before</code></td></tr>
<tr><td><code>y</code></td><td>Join and yank selections to clipboard</td><td><code>yank_joined_to_clipboard</code></td></tr>
<tr><td><code>Y</code></td><td>Yank main selection to clipboard</td><td><code>yank_main_selection_to_clipboard</code></td></tr>
<tr><td><code>R</code></td><td>Replace selections by clipboard contents</td><td><code>replace_selections_with_clipboard</code></td></tr>
<tr><td><code>/</code></td><td>Global search in workspace folder</td><td><code>global_search</code></td></tr>
<tr><td><code>?</code></td><td>Open command palette</td><td><code>command_palette</code></td></tr>
</tbody></table>
</div>
<blockquote>
<p>💡 Global search displays results in a fuzzy picker, use <code>Space + '</code> to bring it back up after opening a file.</p>
</blockquote>
<h5 id="popup"><a class="header" href="#popup">Popup</a></h5>
<p>Displays documentation for item under cursor.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>Ctrl-u</code></td><td>Scroll up</td></tr>
<tr><td><code>Ctrl-d</code></td><td>Scroll down</td></tr>
</tbody></table>
</div>
<h4 id="unimpaired"><a class="header" href="#unimpaired">Unimpaired</a></h4>
<p>These mappings are in the style of <a href="https://github.com/tpope/vim-unimpaired">vim-unimpaired</a>.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>]d</code></td><td>Go to next diagnostic (<strong>LSP</strong>)</td><td><code>goto_next_diag</code></td></tr>
<tr><td><code>[d</code></td><td>Go to previous diagnostic (<strong>LSP</strong>)</td><td><code>goto_prev_diag</code></td></tr>
<tr><td><code>]D</code></td><td>Go to last diagnostic in document (<strong>LSP</strong>)</td><td><code>goto_last_diag</code></td></tr>
<tr><td><code>[D</code></td><td>Go to first diagnostic in document (<strong>LSP</strong>)</td><td><code>goto_first_diag</code></td></tr>
<tr><td><code>]f</code></td><td>Go to next function (<strong>TS</strong>)</td><td><code>goto_next_function</code></td></tr>
<tr><td><code>[f</code></td><td>Go to previous function (<strong>TS</strong>)</td><td><code>goto_prev_function</code></td></tr>
<tr><td><code>]t</code></td><td>Go to next type definition (<strong>TS</strong>)</td><td><code>goto_next_class</code></td></tr>
<tr><td><code>[t</code></td><td>Go to previous type definition (<strong>TS</strong>)</td><td><code>goto_prev_class</code></td></tr>
<tr><td><code>]a</code></td><td>Go to next argument/parameter (<strong>TS</strong>)</td><td><code>goto_next_parameter</code></td></tr>
<tr><td><code>[a</code></td><td>Go to previous argument/parameter (<strong>TS</strong>)</td><td><code>goto_prev_parameter</code></td></tr>
<tr><td><code>]c</code></td><td>Go to next comment (<strong>TS</strong>)</td><td><code>goto_next_comment</code></td></tr>
<tr><td><code>[c</code></td><td>Go to previous comment (<strong>TS</strong>)</td><td><code>goto_prev_comment</code></td></tr>
<tr><td><code>]T</code></td><td>Go to next test (<strong>TS</strong>)</td><td><code>goto_next_test</code></td></tr>
<tr><td><code>[T</code></td><td>Go to previous test (<strong>TS</strong>)</td><td><code>goto_prev_test</code></td></tr>
<tr><td><code>]p</code></td><td>Go to next paragraph</td><td><code>goto_next_paragraph</code></td></tr>
<tr><td><code>[p</code></td><td>Go to previous paragraph</td><td><code>goto_prev_paragraph</code></td></tr>
<tr><td><code>]g</code></td><td>Go to next change</td><td><code>goto_next_change</code></td></tr>
<tr><td><code>[g</code></td><td>Go to previous change</td><td><code>goto_prev_change</code></td></tr>
<tr><td><code>]G</code></td><td>Go to last change</td><td><code>goto_last_change</code></td></tr>
<tr><td><code>[G</code></td><td>Go to first change</td><td><code>goto_first_change</code></td></tr>
<tr><td><code>]Space</code></td><td>Add newline below</td><td><code>add_newline_below</code></td></tr>
<tr><td><code>[Space</code></td><td>Add newline above</td><td><code>add_newline_above</code></td></tr>
</tbody></table>
</div>
<h2 id="insert-mode"><a class="header" href="#insert-mode">Insert mode</a></h2>
<p>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
escaping from insert mode to normal mode.</p>
<blockquote>
<p>💡 New users are strongly encouraged to learn the modal editing paradigm
to get the smoothest experience.</p>
</blockquote>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>Escape</code></td><td>Switch to normal mode</td><td><code>normal_mode</code></td></tr>
<tr><td><code>Ctrl-s</code></td><td>Commit undo checkpoint</td><td><code>commit_undo_checkpoint</code></td></tr>
<tr><td><code>Ctrl-x</code></td><td>Autocomplete</td><td><code>completion</code></td></tr>
<tr><td><code>Ctrl-r</code></td><td>Insert a register content</td><td><code>insert_register</code></td></tr>
<tr><td><code>Ctrl-w</code>, <code>Alt-Backspace</code></td><td>Delete previous word</td><td><code>delete_word_backward</code></td></tr>
<tr><td><code>Alt-d</code>, <code>Alt-Delete</code></td><td>Delete next word</td><td><code>delete_word_forward</code></td></tr>
<tr><td><code>Ctrl-u</code></td><td>Delete to start of line</td><td><code>kill_to_line_start</code></td></tr>
<tr><td><code>Ctrl-k</code></td><td>Delete to end of line</td><td><code>kill_to_line_end</code></td></tr>
<tr><td><code>Ctrl-h</code>, <code>Backspace</code>, <code>Shift-Backspace</code></td><td>Delete previous char</td><td><code>delete_char_backward</code></td></tr>
<tr><td><code>Ctrl-d</code>, <code>Delete</code></td><td>Delete next char</td><td><code>delete_char_forward</code></td></tr>
<tr><td><code>Ctrl-j</code>, <code>Enter</code></td><td>Insert new line</td><td><code>insert_newline</code></td></tr>
</tbody></table>
</div>
<p>These keys are not recommended, but are included for new users less familiar
with modal editors.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th><th>Command</th></tr></thead><tbody>
<tr><td><code>Up</code></td><td>Move to previous line</td><td><code>move_line_up</code></td></tr>
<tr><td><code>Down</code></td><td>Move to next line</td><td><code>move_line_down</code></td></tr>
<tr><td><code>Left</code></td><td>Backward a char</td><td><code>move_char_left</code></td></tr>
<tr><td><code>Right</code></td><td>Forward a char</td><td><code>move_char_right</code></td></tr>
<tr><td><code>PageUp</code></td><td>Move one page up</td><td><code>page_up</code></td></tr>
<tr><td><code>PageDown</code></td><td>Move one page down</td><td><code>page_down</code></td></tr>
<tr><td><code>Home</code></td><td>Move to line start</td><td><code>goto_line_start</code></td></tr>
<tr><td><code>End</code></td><td>Move to line end</td><td><code>goto_line_end_newline</code></td></tr>
</tbody></table>
</div>
<p>As you become more comfortable with modal editing, you may want to disable some
insert mode bindings. You can do this by editing your <code>config.toml</code> file.</p>
<pre><code class="language-toml">[keys.insert]
up = &quot;no_op&quot;
down = &quot;no_op&quot;
left = &quot;no_op&quot;
right = &quot;no_op&quot;
pageup = &quot;no_op&quot;
pagedown = &quot;no_op&quot;
home = &quot;no_op&quot;
end = &quot;no_op&quot;
</code></pre>
<h2 id="select--extend-mode"><a class="header" href="#select--extend-mode">Select / extend mode</a></h2>
<p>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 <code>vgl</code> for example extends the selection to the end of
the line.</p>
<p>Search is also affected. By default, <code>n</code> and <code>N</code> will remove the current
selection and select the next instance of the search term. Toggling this
mode before pressing <code>n</code> or <code>N</code> makes it possible to keep the current
selection. Toggling it on and off during your iterative searching allows
you to selectively add search terms to your selections.</p>
<h2 id="picker"><a class="header" href="#picker">Picker</a></h2>
<p>Keys to use within picker. Remapping currently not supported.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>Shift-Tab</code>, <code>Up</code>, <code>Ctrl-p</code></td><td>Previous entry</td></tr>
<tr><td><code>Tab</code>, <code>Down</code>, <code>Ctrl-n</code></td><td>Next entry</td></tr>
<tr><td><code>PageUp</code>, <code>Ctrl-u</code></td><td>Page up</td></tr>
<tr><td><code>PageDown</code>, <code>Ctrl-d</code></td><td>Page down</td></tr>
<tr><td><code>Home</code></td><td>Go to first entry</td></tr>
<tr><td><code>End</code></td><td>Go to last entry</td></tr>
<tr><td><code>Enter</code></td><td>Open selected</td></tr>
<tr><td><code>Ctrl-s</code></td><td>Open horizontally</td></tr>
<tr><td><code>Ctrl-v</code></td><td>Open vertically</td></tr>
<tr><td><code>Ctrl-t</code></td><td>Toggle preview</td></tr>
<tr><td><code>Escape</code>, <code>Ctrl-c</code></td><td>Close picker</td></tr>
</tbody></table>
</div>
<h2 id="prompt"><a class="header" href="#prompt">Prompt</a></h2>
<p>Keys to use within prompt, Remapping currently not supported.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>Escape</code>, <code>Ctrl-c</code></td><td>Close prompt</td></tr>
<tr><td><code>Alt-b</code>, <code>Ctrl-Left</code></td><td>Backward a word</td></tr>
<tr><td><code>Ctrl-b</code>, <code>Left</code></td><td>Backward a char</td></tr>
<tr><td><code>Alt-f</code>, <code>Ctrl-Right</code></td><td>Forward a word</td></tr>
<tr><td><code>Ctrl-f</code>, <code>Right</code></td><td>Forward a char</td></tr>
<tr><td><code>Ctrl-e</code>, <code>End</code></td><td>Move prompt end</td></tr>
<tr><td><code>Ctrl-a</code>, <code>Home</code></td><td>Move prompt start</td></tr>
<tr><td><code>Ctrl-w</code>, <code>Alt-Backspace</code>, <code>Ctrl-Backspace</code></td><td>Delete previous word</td></tr>
<tr><td><code>Alt-d</code>, <code>Alt-Delete</code>, <code>Ctrl-Delete</code></td><td>Delete next word</td></tr>
<tr><td><code>Ctrl-u</code></td><td>Delete to start of line</td></tr>
<tr><td><code>Ctrl-k</code></td><td>Delete to end of line</td></tr>
<tr><td><code>Backspace</code>, <code>Ctrl-h</code>, <code>Shift-Backspace</code></td><td>Delete previous char</td></tr>
<tr><td><code>Delete</code>, <code>Ctrl-d</code></td><td>Delete next char</td></tr>
<tr><td><code>Ctrl-s</code></td><td>Insert a word under doc cursor, may be changed to Ctrl-r Ctrl-w later</td></tr>
<tr><td><code>Ctrl-p</code>, <code>Up</code></td><td>Select previous history</td></tr>
<tr><td><code>Ctrl-n</code>, <code>Down</code></td><td>Select next history</td></tr>
<tr><td><code>Ctrl-r</code></td><td>Insert the content of the register selected by following input char</td></tr>
<tr><td><code>Tab</code></td><td>Select next completion item</td></tr>
<tr><td><code>BackTab</code></td><td>Select previous completion item</td></tr>
<tr><td><code>Enter</code></td><td>Open selected</td></tr>
</tbody></table>
</div>
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html" class="active"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="language-support"><a class="header" href="#language-support">Language Support</a></h1>
<p>The following languages and Language Servers are supported. To use
Language Server features, you must first <a href="https://github.com/helix-editor/helix/wiki/How-to-install-the-default-language-servers">install</a> the
appropriate Language Server.</p>
<p>You can check the language support in your installed helix version with <code>hx --health</code>.</p>
<p>Also see the <a href="./languages.html">Language Configuration</a> docs and the <a href="./guides/adding_languages.html">Adding
Languages</a> guide for more language configuration information.</p>
<div class="table-wrapper"><table><thead><tr><th>Language</th><th>Syntax Highlighting</th><th>Treesitter Textobjects</th><th>Auto Indent</th><th>Default LSP</th></tr></thead><tbody>
<tr><td>astro</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>awk</td><td>✓</td><td>✓</td><td></td><td><code>awk-language-server</code></td></tr>
<tr><td>bash</td><td>✓</td><td></td><td>✓</td><td><code>bash-language-server</code></td></tr>
<tr><td>bass</td><td>✓</td><td></td><td></td><td><code>bass</code></td></tr>
<tr><td>beancount</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>bibtex</td><td>✓</td><td></td><td></td><td><code>texlab</code></td></tr>
<tr><td>bicep</td><td>✓</td><td></td><td></td><td><code>bicep-langserver</code></td></tr>
<tr><td>c</td><td>✓</td><td>✓</td><td>✓</td><td><code>clangd</code></td></tr>
<tr><td>c-sharp</td><td>✓</td><td>✓</td><td></td><td><code>OmniSharp</code></td></tr>
<tr><td>cabal</td><td></td><td></td><td></td><td></td></tr>
<tr><td>cairo</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>capnp</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>clojure</td><td>✓</td><td></td><td></td><td><code>clojure-lsp</code></td></tr>
<tr><td>cmake</td><td>✓</td><td>✓</td><td>✓</td><td><code>cmake-language-server</code></td></tr>
<tr><td>comment</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>common-lisp</td><td>✓</td><td></td><td></td><td><code>cl-lsp</code></td></tr>
<tr><td>cpon</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>cpp</td><td>✓</td><td>✓</td><td>✓</td><td><code>clangd</code></td></tr>
<tr><td>crystal</td><td>✓</td><td>✓</td><td></td><td><code>crystalline</code></td></tr>
<tr><td>css</td><td>✓</td><td></td><td></td><td><code>vscode-css-language-server</code></td></tr>
<tr><td>cue</td><td>✓</td><td></td><td></td><td><code>cuelsp</code></td></tr>
<tr><td>d</td><td>✓</td><td>✓</td><td>✓</td><td><code>serve-d</code></td></tr>
<tr><td>dart</td><td>✓</td><td></td><td>✓</td><td><code>dart</code></td></tr>
<tr><td>devicetree</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>dhall</td><td>✓</td><td>✓</td><td></td><td><code>dhall-lsp-server</code></td></tr>
<tr><td>diff</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>dockerfile</td><td>✓</td><td></td><td></td><td><code>docker-langserver</code></td></tr>
<tr><td>dot</td><td>✓</td><td></td><td></td><td><code>dot-language-server</code></td></tr>
<tr><td>dtd</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>edoc</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>eex</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>ejs</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>elixir</td><td>✓</td><td>✓</td><td>✓</td><td><code>elixir-ls</code></td></tr>
<tr><td>elm</td><td>✓</td><td>✓</td><td></td><td><code>elm-language-server</code></td></tr>
<tr><td>elvish</td><td>✓</td><td></td><td></td><td><code>elvish</code></td></tr>
<tr><td>env</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>erb</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>erlang</td><td>✓</td><td>✓</td><td></td><td><code>erlang_ls</code></td></tr>
<tr><td>esdl</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>fish</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>fortran</td><td>✓</td><td></td><td>✓</td><td><code>fortls</code></td></tr>
<tr><td>gdscript</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>git-attributes</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>git-commit</td><td>✓</td><td>✓</td><td></td><td></td></tr>
<tr><td>git-config</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>git-ignore</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>git-rebase</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>gleam</td><td>✓</td><td>✓</td><td></td><td><code>gleam</code></td></tr>
<tr><td>glsl</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>go</td><td>✓</td><td>✓</td><td>✓</td><td><code>gopls</code></td></tr>
<tr><td>godot-resource</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>gomod</td><td>✓</td><td></td><td></td><td><code>gopls</code></td></tr>
<tr><td>gotmpl</td><td>✓</td><td></td><td></td><td><code>gopls</code></td></tr>
<tr><td>gowork</td><td>✓</td><td></td><td></td><td><code>gopls</code></td></tr>
<tr><td>graphql</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>hare</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>haskell</td><td>✓</td><td>✓</td><td></td><td><code>haskell-language-server-wrapper</code></td></tr>
<tr><td>hcl</td><td>✓</td><td></td><td>✓</td><td><code>terraform-ls</code></td></tr>
<tr><td>heex</td><td>✓</td><td>✓</td><td></td><td><code>elixir-ls</code></td></tr>
<tr><td>hosts</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>html</td><td>✓</td><td></td><td></td><td><code>vscode-html-language-server</code></td></tr>
<tr><td>hurl</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>idris</td><td></td><td></td><td></td><td><code>idris2-lsp</code></td></tr>
<tr><td>iex</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>ini</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>java</td><td>✓</td><td>✓</td><td></td><td><code>jdtls</code></td></tr>
<tr><td>javascript</td><td>✓</td><td>✓</td><td>✓</td><td><code>typescript-language-server</code></td></tr>
<tr><td>jsdoc</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>json</td><td>✓</td><td></td><td>✓</td><td><code>vscode-json-language-server</code></td></tr>
<tr><td>jsonnet</td><td>✓</td><td></td><td></td><td><code>jsonnet-language-server</code></td></tr>
<tr><td>jsx</td><td>✓</td><td>✓</td><td>✓</td><td><code>typescript-language-server</code></td></tr>
<tr><td>julia</td><td>✓</td><td>✓</td><td>✓</td><td><code>julia</code></td></tr>
<tr><td>just</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>kdl</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>kotlin</td><td>✓</td><td></td><td></td><td><code>kotlin-language-server</code></td></tr>
<tr><td>latex</td><td>✓</td><td>✓</td><td></td><td><code>texlab</code></td></tr>
<tr><td>lean</td><td>✓</td><td></td><td></td><td><code>lean</code></td></tr>
<tr><td>ledger</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>llvm</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>llvm-mir</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>llvm-mir-yaml</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>lua</td><td>✓</td><td>✓</td><td>✓</td><td><code>lua-language-server</code></td></tr>
<tr><td>make</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>markdoc</td><td>✓</td><td></td><td></td><td><code>markdoc-ls</code></td></tr>
<tr><td>markdown</td><td>✓</td><td></td><td></td><td><code>marksman</code></td></tr>
<tr><td>markdown.inline</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>matlab</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>mermaid</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>meson</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>mint</td><td></td><td></td><td></td><td><code>mint</code></td></tr>
<tr><td>msbuild</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>nasm</td><td>✓</td><td>✓</td><td></td><td></td></tr>
<tr><td>nickel</td><td>✓</td><td></td><td>✓</td><td><code>nls</code></td></tr>
<tr><td>nim</td><td>✓</td><td>✓</td><td>✓</td><td><code>nimlangserver</code></td></tr>
<tr><td>nix</td><td>✓</td><td></td><td></td><td><code>nil</code></td></tr>
<tr><td>nu</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>ocaml</td><td>✓</td><td></td><td>✓</td><td><code>ocamllsp</code></td></tr>
<tr><td>ocaml-interface</td><td>✓</td><td></td><td></td><td><code>ocamllsp</code></td></tr>
<tr><td>odin</td><td>✓</td><td></td><td>✓</td><td><code>ols</code></td></tr>
<tr><td>opencl</td><td>✓</td><td>✓</td><td>✓</td><td><code>clangd</code></td></tr>
<tr><td>openscad</td><td>✓</td><td></td><td></td><td><code>openscad-lsp</code></td></tr>
<tr><td>org</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>pascal</td><td>✓</td><td>✓</td><td></td><td><code>pasls</code></td></tr>
<tr><td>passwd</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>pem</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>perl</td><td>✓</td><td>✓</td><td>✓</td><td><code>perlnavigator</code></td></tr>
<tr><td>php</td><td>✓</td><td>✓</td><td>✓</td><td><code>intelephense</code></td></tr>
<tr><td>po</td><td>✓</td><td>✓</td><td></td><td></td></tr>
<tr><td>ponylang</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>prisma</td><td>✓</td><td></td><td></td><td><code>prisma-language-server</code></td></tr>
<tr><td>prolog</td><td></td><td></td><td></td><td><code>swipl</code></td></tr>
<tr><td>protobuf</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>prql</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>purescript</td><td>✓</td><td></td><td></td><td><code>purescript-language-server</code></td></tr>
<tr><td>python</td><td>✓</td><td>✓</td><td>✓</td><td><code>pylsp</code></td></tr>
<tr><td>qml</td><td>✓</td><td></td><td>✓</td><td><code>qmlls</code></td></tr>
<tr><td>r</td><td>✓</td><td></td><td></td><td><code>R</code></td></tr>
<tr><td>racket</td><td>✓</td><td></td><td></td><td><code>racket</code></td></tr>
<tr><td>regex</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>rego</td><td>✓</td><td></td><td></td><td><code>regols</code></td></tr>
<tr><td>rescript</td><td>✓</td><td>✓</td><td></td><td><code>rescript-language-server</code></td></tr>
<tr><td>rmarkdown</td><td>✓</td><td></td><td>✓</td><td><code>R</code></td></tr>
<tr><td>robot</td><td>✓</td><td></td><td></td><td><code>robotframework_ls</code></td></tr>
<tr><td>ron</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>rst</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>ruby</td><td>✓</td><td>✓</td><td>✓</td><td><code>solargraph</code></td></tr>
<tr><td>rust</td><td>✓</td><td>✓</td><td>✓</td><td><code>rust-analyzer</code></td></tr>
<tr><td>sage</td><td>✓</td><td>✓</td><td></td><td></td></tr>
<tr><td>scala</td><td>✓</td><td></td><td>✓</td><td><code>metals</code></td></tr>
<tr><td>scheme</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>scss</td><td>✓</td><td></td><td></td><td><code>vscode-css-language-server</code></td></tr>
<tr><td>slint</td><td>✓</td><td></td><td>✓</td><td><code>slint-lsp</code></td></tr>
<tr><td>smithy</td><td>✓</td><td></td><td></td><td><code>cs</code></td></tr>
<tr><td>sml</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>solidity</td><td>✓</td><td></td><td></td><td><code>solc</code></td></tr>
<tr><td>sql</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>sshclientconfig</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>starlark</td><td>✓</td><td>✓</td><td></td><td></td></tr>
<tr><td>svelte</td><td>✓</td><td></td><td></td><td><code>svelteserver</code></td></tr>
<tr><td>sway</td><td>✓</td><td>✓</td><td>✓</td><td><code>forc</code></td></tr>
<tr><td>swift</td><td>✓</td><td></td><td></td><td><code>sourcekit-lsp</code></td></tr>
<tr><td>tablegen</td><td>✓</td><td>✓</td><td>✓</td><td></td></tr>
<tr><td>task</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>tfvars</td><td>✓</td><td></td><td>✓</td><td><code>terraform-ls</code></td></tr>
<tr><td>toml</td><td>✓</td><td></td><td></td><td><code>taplo</code></td></tr>
<tr><td>tsq</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>tsx</td><td>✓</td><td>✓</td><td>✓</td><td><code>typescript-language-server</code></td></tr>
<tr><td>twig</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>typescript</td><td>✓</td><td>✓</td><td>✓</td><td><code>typescript-language-server</code></td></tr>
<tr><td>ungrammar</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>uxntal</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>v</td><td>✓</td><td>✓</td><td>✓</td><td><code>v</code></td></tr>
<tr><td>vala</td><td>✓</td><td></td><td></td><td><code>vala-language-server</code></td></tr>
<tr><td>verilog</td><td>✓</td><td>✓</td><td></td><td><code>svlangserver</code></td></tr>
<tr><td>vhdl</td><td>✓</td><td></td><td></td><td><code>vhdl_ls</code></td></tr>
<tr><td>vhs</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>vue</td><td>✓</td><td></td><td></td><td><code>vls</code></td></tr>
<tr><td>wast</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>wat</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>wgsl</td><td>✓</td><td></td><td></td><td><code>wgsl_analyzer</code></td></tr>
<tr><td>wit</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>xit</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>xml</td><td>✓</td><td></td><td>✓</td><td></td></tr>
<tr><td>yaml</td><td>✓</td><td></td><td>✓</td><td><code>yaml-language-server</code></td></tr>
<tr><td>yuck</td><td>✓</td><td></td><td></td><td></td></tr>
<tr><td>zig</td><td>✓</td><td>✓</td><td>✓</td><td><code>zls</code></td></tr>
</tbody></table>
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<h1 id="languages"><a class="header" href="#languages">Languages</a></h1>
<p>Language-specific settings and settings for language servers are configured
in <code>languages.toml</code> files.</p>
<h2 id="languagestoml-files"><a class="header" href="#languagestoml-files"><code>languages.toml</code> files</a></h2>
<p>There are three possible locations for a <code>languages.toml</code> file:</p>
<ol>
<li>
<p>In the Helix source code, this lives in the
<a href="https://github.com/helix-editor/helix/blob/master/languages.toml">Helix repository</a>.
It provides the default configurations for languages and language servers.</p>
</li>
<li>
<p>In your <a href="./configuration.html">configuration directory</a>. This overrides values
from the built-in language configuration. For example to disable
auto-LSP-formatting in Rust:</p>
</li>
</ol>
<pre><code class="language-toml"># in &lt;config_dir&gt;/helix/languages.toml
[language-server.mylang-lsp]
command = &quot;mylang-lsp&quot;
[[language]]
name = &quot;rust&quot;
auto-format = false
</code></pre>
<ol start="3">
<li>In a <code>.helix</code> folder in your project. Language configuration may also be
overridden local to a project by creating a <code>languages.toml</code> file in a
<code>.helix</code> folder. Its settings will be merged with the language configuration
in the configuration directory and the built-in configuration.</li>
</ol>
<h2 id="language-configuration"><a class="header" href="#language-configuration">Language configuration</a></h2>
<p>Each language is configured by adding a <code>[[language]]</code> section to a
<code>languages.toml</code> file. For example:</p>
<pre><code class="language-toml">[[language]]
name = &quot;mylang&quot;
scope = &quot;source.mylang&quot;
injection-regex = &quot;mylang&quot;
file-types = [&quot;mylang&quot;, &quot;myl&quot;]
comment-token = &quot;#&quot;
indent = { tab-width = 2, unit = &quot; &quot; }
formatter = { command = &quot;mylang-formatter&quot; , args = [&quot;--stdin&quot;] }
language-servers = [ &quot;mylang-lsp&quot; ]
</code></pre>
<p>These configuration keys are available:</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>name</code></td><td>The name of the language</td></tr>
<tr><td><code>language-id</code></td><td>The language-id for language servers, checkout the table at <a href="https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentItem">TextDocumentItem</a> for the right id</td></tr>
<tr><td><code>scope</code></td><td>A string like <code>source.js</code> that identifies the language. Currently, we strive to match the scope names used by popular TextMate grammars and by the Linguist library. Usually <code>source.&lt;name&gt;</code> or <code>text.&lt;name&gt;</code> in case of markup languages</td></tr>
<tr><td><code>injection-regex</code></td><td>regex pattern that will be tested against a language name in order to determine whether this language should be used for a potential <a href="https://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection">language injection</a> site.</td></tr>
<tr><td><code>file-types</code></td><td>The filetypes of the language, for example <code>[&quot;yml&quot;, &quot;yaml&quot;]</code>. See the file-type detection section below.</td></tr>
<tr><td><code>shebangs</code></td><td>The interpreters from the shebang line, for example <code>[&quot;sh&quot;, &quot;bash&quot;]</code></td></tr>
<tr><td><code>roots</code></td><td>A set of marker files to look for when trying to find the workspace root. For example <code>Cargo.lock</code>, <code>yarn.lock</code></td></tr>
<tr><td><code>auto-format</code></td><td>Whether to autoformat this language when saving</td></tr>
<tr><td><code>diagnostic-severity</code></td><td>Minimal severity of diagnostic for it to be displayed. (Allowed values: <code>Error</code>, <code>Warning</code>, <code>Info</code>, <code>Hint</code>)</td></tr>
<tr><td><code>comment-token</code></td><td>The token to use as a comment-token</td></tr>
<tr><td><code>indent</code></td><td>The indent to use. Has sub keys <code>unit</code> (the text inserted into the document when indenting; usually set to N spaces or <code>&quot;\t&quot;</code> for tabs) and <code>tab-width</code> (the number of spaces rendered for a tab)</td></tr>
<tr><td><code>language-servers</code></td><td>The Language Servers used for this language. See below for more information in the section <a href="#configuring-language-servers-for-a-language">Configuring Language Servers for a language</a></td></tr>
<tr><td><code>config</code></td><td>Language Server configuration</td></tr>
<tr><td><code>grammar</code></td><td>The tree-sitter grammar to use (defaults to the value of <code>name</code>)</td></tr>
<tr><td><code>formatter</code></td><td>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</td></tr>
<tr><td><code>text-width</code></td><td>Maximum line length. Used for the <code>:reflow</code> command and soft-wrapping if <code>soft-wrap.wrap-at-text-width</code> is set, defaults to <code>editor.text-width</code></td></tr>
<tr><td><code>workspace-lsp-roots</code></td><td>Directories relative to the workspace root that are treated as LSP roots. Should only be set in <code>.helix/config.toml</code>. Overwrites the setting of the same name in <code>config.toml</code> if set.</td></tr>
</tbody></table>
</div>
<h3 id="file-type-detection-and-the-file-types-key"><a class="header" href="#file-type-detection-and-the-file-types-key">File-type detection and the <code>file-types</code> key</a></h3>
<p>Helix determines which language configuration to use based on the <code>file-types</code> key
from the above section. <code>file-types</code> is a list of strings or tables, for
example:</p>
<pre><code class="language-toml">file-types = [&quot;Makefile&quot;, &quot;toml&quot;, { suffix = &quot;.git/config&quot; }]
</code></pre>
<p>When determining a language configuration to use, Helix searches the file-types
with the following priorities:</p>
<ol>
<li>Exact match: if the filename of a file is an exact match of a string in a
<code>file-types</code> list, that language wins. In the example above, <code>&quot;Makefile&quot;</code>
will match against <code>Makefile</code> files.</li>
<li>Extension: if there are no exact matches, any <code>file-types</code> string that
matches the file extension of a given file wins. In the example above, the
<code>&quot;toml&quot;</code> matches files like <code>Cargo.toml</code> or <code>languages.toml</code>.</li>
<li>Suffix: if there are still no matches, any values in <code>suffix</code> tables
are checked against the full path of the given file. In the example above,
the <code>{ suffix = &quot;.git/config&quot; }</code> would match against any <code>config</code> files
in <code>.git</code> directories. Note: <code>/</code> is used as the directory separator but is
replaced at runtime with the appropriate path separator for the operating
system, so this rule would match against <code>.git\config</code> files on Windows.</li>
</ol>
<h2 id="language-server-configuration"><a class="header" href="#language-server-configuration">Language Server configuration</a></h2>
<p>Language servers are configured separately in the table <code>language-server</code> in the same file as the languages <code>languages.toml</code></p>
<p>For example:</p>
<pre><code class="language-toml">[language-server.mylang-lsp]
command = &quot;mylang-lsp&quot;
args = [&quot;--stdio&quot;]
config = { provideFormatter = true }
environment = { &quot;ENV1&quot; = &quot;value1&quot;, &quot;ENV2&quot; = &quot;value2&quot; }
[language-server.efm-lsp-prettier]
command = &quot;efm-langserver&quot;
[language-server.efm-lsp-prettier.config]
documentFormatting = true
languages = { typescript = [ { formatCommand =&quot;prettier --stdin-filepath ${INPUT}&quot;, formatStdin = true } ] }
</code></pre>
<p>These are the available options for a language server.</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>command</code></td><td>The name or path of the language server binary to execute. Binaries must be in <code>$PATH</code></td></tr>
<tr><td><code>args</code></td><td>A list of arguments to pass to the language server binary</td></tr>
<tr><td><code>config</code></td><td>LSP initialization options</td></tr>
<tr><td><code>timeout</code></td><td>The maximum time a request to the language server may take, in seconds. Defaults to <code>20</code></td></tr>
<tr><td><code>environment</code></td><td>Any environment variables that will be used when starting the language server <code>{ &quot;KEY1&quot; = &quot;Value1&quot;, &quot;KEY2&quot; = &quot;Value2&quot; }</code></td></tr>
</tbody></table>
</div>
<p>A <code>format</code> sub-table within <code>config</code> can be used to pass extra formatting options to
<a href="https://github.com/microsoft/language-server-protocol/blob/gh-pages/_specifications/specification-3-17.md#document-formatting-request--leftwards_arrow_with_hook">Document Formatting Requests</a>.
For example with typescript:</p>
<pre><code class="language-toml">[language-server.typescript-language-server]
# pass format options according to https://github.com/typescript-language-server/typescript-language-server#workspacedidchangeconfiguration omitting the &quot;[language].format.&quot; prefix.
config = { format = { &quot;semicolons&quot; = &quot;insert&quot;, &quot;insertSpaceBeforeFunctionParenthesis&quot; = true } }
</code></pre>
<h3 id="configuring-language-servers-for-a-language"><a class="header" href="#configuring-language-servers-for-a-language">Configuring Language Servers for a language</a></h3>
<p>The <code>language-servers</code> attribute in a language tells helix which language servers are used for this language.</p>
<p>They have to be defined in the <code>[language-server]</code> table as described in the previous section.</p>
<p>Different languages can use the same language server instance, e.g. <code>typescript-language-server</code> is used for javascript, jsx, tsx and typescript by default.</p>
<p>In case multiple language servers are specified in the <code>language-servers</code> attribute of a <code>language</code>,
it's often useful to only enable/disable certain language-server features for these language servers.</p>
<p>For example <code>efm-lsp-prettier</code> of the previous example is used only with a formatting command <code>prettier</code>,
so everything else should be handled by the <code>typescript-language-server</code> (which is configured by default)
The language configuration for typescript could look like this:</p>
<pre><code class="language-toml">[[language]]
name = &quot;typescript&quot;
language-servers = [ { name = &quot;efm-lsp-prettier&quot;, only-features = [ &quot;format&quot; ] }, &quot;typescript-language-server&quot; ]
</code></pre>
<p>or equivalent:</p>
<pre><code class="language-toml">[[language]]
name = &quot;typescript&quot;
language-servers = [ { name = &quot;typescript-language-server&quot;, except-features = [ &quot;format&quot; ] }, &quot;efm-lsp-prettier&quot; ]
</code></pre>
<p>Each requested LSP feature is prioritized in the order of the <code>language-servers</code> array.
For example the first <code>goto-definition</code> supported language server (in this case <code>typescript-language-server</code>) will be taken for the relevant LSP request (command <code>goto_definition</code>).
The features <code>diagnostics</code>, <code>code-action</code>, <code>completion</code>, <code>document-symbols</code> and <code>workspace-symbols</code> 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 <code>except-features</code> or <code>only-features</code> 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).</p>
<p>The list of supported features is:</p>
<ul>
<li><code>format</code></li>
<li><code>goto-definition</code></li>
<li><code>goto-declaration</code></li>
<li><code>goto-type-definition</code></li>
<li><code>goto-reference</code></li>
<li><code>goto-implementation</code></li>
<li><code>signature-help</code></li>
<li><code>hover</code></li>
<li><code>document-highlight</code></li>
<li><code>completion</code></li>
<li><code>code-action</code></li>
<li><code>workspace-command</code></li>
<li><code>document-symbols</code></li>
<li><code>workspace-symbols</code></li>
<li><code>diagnostics</code></li>
<li><code>rename-symbol</code></li>
<li><code>inlay-hints</code></li>
</ul>
<h2 id="tree-sitter-grammar-configuration"><a class="header" href="#tree-sitter-grammar-configuration">Tree-sitter grammar configuration</a></h2>
<p>The source for a language's tree-sitter grammar is specified in a <code>[[grammar]]</code>
section in <code>languages.toml</code>. For example:</p>
<pre><code class="language-toml">[[grammar]]
name = &quot;mylang&quot;
source = { git = &quot;https://github.com/example/mylang&quot;, rev = &quot;a250c4582510ff34767ec3b7dcdd3c24e8c8aa68&quot; }
</code></pre>
<p>Grammar configuration takes these keys:</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>name</code></td><td>The name of the tree-sitter grammar</td></tr>
<tr><td><code>source</code></td><td>The method of fetching the grammar - a table with a schema defined below</td></tr>
</tbody></table>
</div>
<p>Where <code>source</code> is a table with either these keys when using a grammar from a
git repository:</p>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody>
<tr><td><code>git</code></td><td>A git remote URL from which the grammar should be cloned</td></tr>
<tr><td><code>rev</code></td><td>The revision (commit hash or tag) which should be fetched</td></tr>
<tr><td><code>subpath</code></td><td>A path within the grammar directory which should be built. Some grammar repositories host multiple grammars (for example <code>tree-sitter-typescript</code> and <code>tree-sitter-ocaml</code>) in subdirectories. This key is used to point <code>hx --grammar build</code> to the correct path for compilation. When omitted, the root of repository is used</td></tr>
</tbody></table>
</div>
<h3 id="choosing-grammars"><a class="header" href="#choosing-grammars">Choosing grammars</a></h3>
<p>You may use a top-level <code>use-grammars</code> key to control which grammars are
fetched and built when using <code>hx --grammar fetch</code> and <code>hx --grammar build</code>.</p>
<pre><code class="language-toml"># Note: this key must come **before** the [[language]] and [[grammar]] sections
use-grammars = { only = [ &quot;rust&quot;, &quot;c&quot;, &quot;cpp&quot; ] }
# or
use-grammars = { except = [ &quot;yaml&quot;, &quot;json&quot; ] }
</code></pre>
<p>When omitted, all grammars are fetched and built.</p>
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<h1 id="key-remapping"><a class="header" href="#key-remapping">Key remapping</a></h1>
<p>Helix currently supports one-way key remapping through a simple TOML configuration
file. (More powerful solutions such as rebinding via commands will be
available in the future).</p>
<p>To remap keys, create a <code>config.toml</code> file in your <code>helix</code> configuration
directory (default <code>~/.config/helix</code> on Linux systems) with a structure like
this:</p>
<pre><code class="language-toml"># At most one section each of 'keys.normal', 'keys.insert' and 'keys.select'
[keys.normal]
C-s = &quot;:w&quot; # Maps Ctrl-s to the typable command :w which is an alias for :write (save file)
C-o = &quot;:open ~/.config/helix/config.toml&quot; # Maps Ctrl-o to opening of the helix config file
a = &quot;move_char_left&quot; # Maps the 'a' key to the move_char_left command
w = &quot;move_line_up&quot; # Maps the 'w' key move_line_up
&quot;C-S-esc&quot; = &quot;extend_line&quot; # Maps Ctrl-Shift-Escape to extend_line
g = { a = &quot;code_action&quot; } # Maps `ga` to show possible code actions
&quot;ret&quot; = [&quot;open_below&quot;, &quot;normal_mode&quot;] # Maps the enter key to open_below then re-enter normal mode
[keys.insert]
&quot;A-x&quot; = &quot;normal_mode&quot; # Maps Alt-X to enter normal mode
j = { k = &quot;normal_mode&quot; } # Maps `jk` to exit insert mode
</code></pre>
<h2 id="minor-modes"><a class="header" href="#minor-modes">Minor modes</a></h2>
<p>Minor modes are accessed by pressing a key (usually from normal mode), giving access to dedicated bindings. Bindings
can be modified or added by nesting definitions.</p>
<pre><code class="language-toml">[keys.insert.j]
k = &quot;normal_mode&quot; # Maps `jk` to exit insert mode
[keys.normal.g]
a = &quot;code_action&quot; # Maps `ga` to show possible code actions
# invert `j` and `k` in view mode
[keys.normal.z]
j = &quot;scroll_up&quot;
k = &quot;scroll_down&quot;
# create a new minor mode bound to `+`
[keys.normal.&quot;+&quot;]
m = &quot;:run-shell-command make&quot;
c = &quot;:run-shell-command cargo build&quot;
t = &quot;:run-shell-command cargo test&quot;
</code></pre>
<h2 id="special-keys-and-modifiers"><a class="header" href="#special-keys-and-modifiers">Special keys and modifiers</a></h2>
<p>Ctrl, Shift and Alt modifiers are encoded respectively with the prefixes
<code>C-</code>, <code>S-</code> and <code>A-</code>. Special keys are encoded as follows:</p>
<div class="table-wrapper"><table><thead><tr><th>Key name</th><th>Representation</th></tr></thead><tbody>
<tr><td>Backspace</td><td><code>&quot;backspace&quot;</code></td></tr>
<tr><td>Space</td><td><code>&quot;space&quot;</code></td></tr>
<tr><td>Return/Enter</td><td><code>&quot;ret&quot;</code></td></tr>
<tr><td>-</td><td><code>&quot;minus&quot;</code></td></tr>
<tr><td>Left</td><td><code>&quot;left&quot;</code></td></tr>
<tr><td>Right</td><td><code>&quot;right&quot;</code></td></tr>
<tr><td>Up</td><td><code>&quot;up&quot;</code></td></tr>
<tr><td>Down</td><td><code>&quot;down&quot;</code></td></tr>
<tr><td>Home</td><td><code>&quot;home&quot;</code></td></tr>
<tr><td>End</td><td><code>&quot;end&quot;</code></td></tr>
<tr><td>Page Up</td><td><code>&quot;pageup&quot;</code></td></tr>
<tr><td>Page Down</td><td><code>&quot;pagedown&quot;</code></td></tr>
<tr><td>Tab</td><td><code>&quot;tab&quot;</code></td></tr>
<tr><td>Delete</td><td><code>&quot;del&quot;</code></td></tr>
<tr><td>Insert</td><td><code>&quot;ins&quot;</code></td></tr>
<tr><td>Null</td><td><code>&quot;null&quot;</code></td></tr>
<tr><td>Escape</td><td><code>&quot;esc&quot;</code></td></tr>
</tbody></table>
</div>
<p>Keys can be disabled by binding them to the <code>no_op</code> command.</p>
<p>A list of commands is available in the <a href="https://docs.helix-editor.com/keymap.html">Keymap</a> documentation
and in the source code at <a href="https://github.com/helix-editor/helix/blob/master/helix-term/src/commands.rs"><code>helix-term/src/commands.rs</code></a> at the invocation of <code>static_commands!</code> macro and the <code>TypableCommandList</code>.</p>
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+ teaser + '</span>';
}
function makeTeaser(body, searchterms) {
// The strategy is as follows:
// First, assign a value to each word in the document:
// Words that correspond to search terms (stemmer aware): 40
// Normal words: 2
// First word in a sentence: 8
// Then use a sliding window with a constant number of words and count the
// sum of the values of the words within the window. Then use the window that got the
// maximum sum. If there are multiple maximas, then get the last one.
// Enclose the terms in <em>.
var stemmed_searchterms = searchterms.map(function(w) {
return elasticlunr.stemmer(w.toLowerCase());
});
var searchterm_weight = 40;
var weighted = []; // contains elements of ["word", weight, index_in_document]
// split in sentences, then words
var sentences = body.toLowerCase().split('. ');
var index = 0;
var value = 0;
var searchterm_found = false;
for (var sentenceindex in sentences) {
var words = sentences[sentenceindex].split(' ');
value = 8;
for (var wordindex in words) {
var word = words[wordindex];
if (word.length > 0) {
for (var searchtermindex in stemmed_searchterms) {
if (elasticlunr.stemmer(word).startsWith(stemmed_searchterms[searchtermindex])) {
value = searchterm_weight;
searchterm_found = true;
}
};
weighted.push([word, value, index]);
value = 2;
}
index += word.length;
index += 1; // ' ' or '.' if last word in sentence
};
index += 1; // because we split at a two-char boundary '. '
};
if (weighted.length == 0) {
return body;
}
var window_weight = [];
var window_size = Math.min(weighted.length, results_options.teaser_word_count);
var cur_sum = 0;
for (var wordindex = 0; wordindex < window_size; wordindex++) {
cur_sum += weighted[wordindex][1];
};
window_weight.push(cur_sum);
for (var wordindex = 0; wordindex < weighted.length - window_size; wordindex++) {
cur_sum -= weighted[wordindex][1];
cur_sum += weighted[wordindex + window_size][1];
window_weight.push(cur_sum);
};
if (searchterm_found) {
var max_sum = 0;
var max_sum_window_index = 0;
// backwards
for (var i = window_weight.length - 1; i >= 0; i--) {
if (window_weight[i] > max_sum) {
max_sum = window_weight[i];
max_sum_window_index = i;
}
};
} else {
max_sum_window_index = 0;
}
// add <em/> around searchterms
var teaser_split = [];
var index = weighted[max_sum_window_index][2];
for (var i = max_sum_window_index; i < max_sum_window_index+window_size; i++) {
var word = weighted[i];
if (index < word[2]) {
// missing text from index to start of `word`
teaser_split.push(body.substring(index, word[2]));
index = word[2];
}
if (word[1] == searchterm_weight) {
teaser_split.push("<em>")
}
index = word[2] + word[0].length;
teaser_split.push(body.substring(word[2], index));
if (word[1] == searchterm_weight) {
teaser_split.push("</em>")
}
};
return teaser_split.join('');
}
function init(config) {
results_options = config.results_options;
search_options = config.search_options;
searchbar_outer = config.searchbar_outer;
doc_urls = config.doc_urls;
searchindex = elasticlunr.Index.load(config.index);
// Set up events
searchicon.addEventListener('click', function(e) { searchIconClickHandler(); }, false);
searchbar.addEventListener('keyup', function(e) { searchbarKeyUpHandler(); }, false);
document.addEventListener('keydown', function(e) { globalKeyHandler(e); }, false);
// If the user uses the browser buttons, do the same as if a reload happened
window.onpopstate = function(e) { doSearchOrMarkFromUrl(); };
// Suppress "submit" events so the page doesn't reload when the user presses Enter
document.addEventListener('submit', function(e) { e.preventDefault(); }, false);
// If reloaded, do the search or mark again, depending on the current url parameters
doSearchOrMarkFromUrl();
}
function unfocusSearchbar() {
// hacky, but just focusing a div only works once
var tmp = document.createElement('input');
tmp.setAttribute('style', 'position: absolute; opacity: 0;');
searchicon.appendChild(tmp);
tmp.focus();
tmp.remove();
}
// On reload or browser history backwards/forwards events, parse the url and do search or mark
function doSearchOrMarkFromUrl() {
// Check current URL for search request
var url = parseURL(window.location.href);
if (url.params.hasOwnProperty(URL_SEARCH_PARAM)
&& url.params[URL_SEARCH_PARAM] != "") {
showSearch(true);
searchbar.value = decodeURIComponent(
(url.params[URL_SEARCH_PARAM]+'').replace(/\+/g, '%20'));
searchbarKeyUpHandler(); // -> doSearch()
} else {
showSearch(false);
}
if (url.params.hasOwnProperty(URL_MARK_PARAM)) {
var words = decodeURIComponent(url.params[URL_MARK_PARAM]).split(' ');
marker.mark(words, {
exclude: mark_exclude
});
var markers = document.querySelectorAll("mark");
function hide() {
for (var i = 0; i < markers.length; i++) {
markers[i].classList.add("fade-out");
window.setTimeout(function(e) { marker.unmark(); }, 300);
}
}
for (var i = 0; i < markers.length; i++) {
markers[i].addEventListener('click', hide);
}
}
}
// Eventhandler for keyevents on `document`
function globalKeyHandler(e) {
if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey || e.target.type === 'textarea' || e.target.type === 'text') { return; }
if (e.keyCode === ESCAPE_KEYCODE) {
e.preventDefault();
searchbar.classList.remove("active");
setSearchUrlParameters("",
(searchbar.value.trim() !== "") ? "push" : "replace");
if (hasFocus()) {
unfocusSearchbar();
}
showSearch(false);
marker.unmark();
} else if (!hasFocus() && e.keyCode === SEARCH_HOTKEY_KEYCODE) {
e.preventDefault();
showSearch(true);
window.scrollTo(0, 0);
searchbar.select();
} else if (hasFocus() && e.keyCode === DOWN_KEYCODE) {
e.preventDefault();
unfocusSearchbar();
searchresults.firstElementChild.classList.add("focus");
} else if (!hasFocus() && (e.keyCode === DOWN_KEYCODE
|| e.keyCode === UP_KEYCODE
|| e.keyCode === SELECT_KEYCODE)) {
// not `:focus` because browser does annoying scrolling
var focused = searchresults.querySelector("li.focus");
if (!focused) return;
e.preventDefault();
if (e.keyCode === DOWN_KEYCODE) {
var next = focused.nextElementSibling;
if (next) {
focused.classList.remove("focus");
next.classList.add("focus");
}
} else if (e.keyCode === UP_KEYCODE) {
focused.classList.remove("focus");
var prev = focused.previousElementSibling;
if (prev) {
prev.classList.add("focus");
} else {
searchbar.select();
}
} else { // SELECT_KEYCODE
window.location.assign(focused.querySelector('a'));
}
}
}
function showSearch(yes) {
if (yes) {
search_wrap.classList.remove('hidden');
searchicon.setAttribute('aria-expanded', 'true');
} else {
search_wrap.classList.add('hidden');
searchicon.setAttribute('aria-expanded', 'false');
var results = searchresults.children;
for (var i = 0; i < results.length; i++) {
results[i].classList.remove("focus");
}
}
}
function showResults(yes) {
if (yes) {
searchresults_outer.classList.remove('hidden');
} else {
searchresults_outer.classList.add('hidden');
}
}
// Eventhandler for search icon
function searchIconClickHandler() {
if (search_wrap.classList.contains('hidden')) {
showSearch(true);
window.scrollTo(0, 0);
searchbar.select();
} else {
showSearch(false);
}
}
// Eventhandler for keyevents while the searchbar is focused
function searchbarKeyUpHandler() {
var searchterm = searchbar.value.trim();
if (searchterm != "") {
searchbar.classList.add("active");
doSearch(searchterm);
} else {
searchbar.classList.remove("active");
showResults(false);
removeChildren(searchresults);
}
setSearchUrlParameters(searchterm, "push_if_new_search_else_replace");
// Remove marks
marker.unmark();
}
// Update current url with ?URL_SEARCH_PARAM= parameter, remove ?URL_MARK_PARAM and #heading-anchor .
// `action` can be one of "push", "replace", "push_if_new_search_else_replace"
// and replaces or pushes a new browser history item.
// "push_if_new_search_else_replace" pushes if there is no `?URL_SEARCH_PARAM=abc` yet.
function setSearchUrlParameters(searchterm, action) {
var url = parseURL(window.location.href);
var first_search = ! url.params.hasOwnProperty(URL_SEARCH_PARAM);
if (searchterm != "" || action == "push_if_new_search_else_replace") {
url.params[URL_SEARCH_PARAM] = searchterm;
delete url.params[URL_MARK_PARAM];
url.hash = "";
} else {
delete url.params[URL_MARK_PARAM];
delete url.params[URL_SEARCH_PARAM];
}
// A new search will also add a new history item, so the user can go back
// to the page prior to searching. A updated search term will only replace
// the url.
if (action == "push" || (action == "push_if_new_search_else_replace" && first_search) ) {
history.pushState({}, document.title, renderURL(url));
} else if (action == "replace" || (action == "push_if_new_search_else_replace" && !first_search) ) {
history.replaceState({}, document.title, renderURL(url));
}
}
function doSearch(searchterm) {
// Don't search the same twice
if (current_searchterm == searchterm) { return; }
else { current_searchterm = searchterm; }
if (searchindex == null) { return; }
// Do the actual search
var results = searchindex.search(searchterm, search_options);
var resultcount = Math.min(results.length, results_options.limit_results);
// Display search metrics
searchresults_header.innerText = formatSearchMetric(resultcount, searchterm);
// Clear and insert results
var searchterms = searchterm.split(' ');
removeChildren(searchresults);
for(var i = 0; i < resultcount ; i++){
var resultElem = document.createElement('li');
resultElem.innerHTML = formatSearchResult(results[i], searchterms);
searchresults.appendChild(resultElem);
}
// Display results
showResults(true);
}
fetch(path_to_root + 'searchindex.json')
.then(response => response.json())
.then(json => init(json))
.catch(error => { // Try to load searchindex.js if fetch failed
var script = document.createElement('script');
script.src = path_to_root + 'searchindex.js';
script.onload = () => init(window.search);
document.head.appendChild(script);
});
// Exported functions
search.hasFocus = hasFocus;
})(window.search);

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var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "colibri" : "colibri";
</script>
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<script type="text/javascript">
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var theme = localStorage.getItem('mdbook-theme');
var sidebar = localStorage.getItem('mdbook-sidebar');
if (theme.startsWith('"') && theme.endsWith('"')) {
localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
}
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localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
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</script>
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var html = document.querySelector('html');
html.classList.remove('no-js')
html.classList.remove('colibri')
html.classList.add(theme);
html.classList.add('js');
</script>
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var html = document.querySelector('html');
var sidebar = 'hidden';
if (document.body.clientWidth >= 1080) {
try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
sidebar = sidebar || 'visible';
}
html.classList.remove('sidebar-visible');
html.classList.add("sidebar-" + sidebar);
</script>
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
<div class="sidebar-scrollbox">
<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html" class="active"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
<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>
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<main>
<h1 id="themes"><a class="header" href="#themes">Themes</a></h1>
<p>To use a theme add <code>theme = &quot;&lt;name&gt;&quot;</code> to the top of your <a href="./configuration.html"><code>config.toml</code></a> file, or select it during runtime using <code>:theme &lt;name&gt;</code>.</p>
<h2 id="creating-a-theme"><a class="header" href="#creating-a-theme">Creating a theme</a></h2>
<p>Create a file with the name of your theme as the file name (i.e <code>mytheme.toml</code>) and place it in your <code>themes</code> directory (i.e <code>~/.config/helix/themes</code> or <code>%AppData%\helix\themes</code> on Windows). The directory might have to be created beforehand.</p>
<blockquote>
<p>💡 The names &quot;default&quot; and &quot;base16_default&quot; are reserved for built-in themes
and cannot be overridden by user-defined themes.</p>
</blockquote>
<h3 id="overview"><a class="header" href="#overview">Overview</a></h3>
<p>Each line in the theme file is specified as below:</p>
<pre><code class="language-toml">key = { fg = &quot;#ffffff&quot;, bg = &quot;#000000&quot;, underline = { color = &quot;#ff0000&quot;, style = &quot;curl&quot;}, modifiers = [&quot;bold&quot;, &quot;italic&quot;] }
</code></pre>
<p>Where <code>key</code> represents what you want to style, <code>fg</code> specifies the foreground color, <code>bg</code> the background color, <code>underline</code> the underline <code>style</code>/<code>color</code>, and <code>modifiers</code> is a list of style modifiers. <code>bg</code>, <code>underline</code> and <code>modifiers</code> can be omitted to defer to the defaults.</p>
<p>To specify only the foreground color:</p>
<pre><code class="language-toml">key = &quot;#ffffff&quot;
</code></pre>
<p>If the key contains a dot <code>'.'</code>, it must be quoted to prevent it being parsed as a <a href="https://toml.io/en/v1.0.0#keys">dotted key</a>.</p>
<pre><code class="language-toml">&quot;key.key&quot; = &quot;#ffffff&quot;
</code></pre>
<p>For inspiration, you can find the default <code>theme.toml</code>
<a href="https://github.com/helix-editor/helix/blob/master/theme.toml">here</a> and
user-submitted themes
<a href="https://github.com/helix-editor/helix/blob/master/runtime/themes">here</a>.</p>
<h3 id="using-the-linter"><a class="header" href="#using-the-linter">Using the linter</a></h3>
<p>Use the supplied linting tool to check for errors and missing scopes:</p>
<pre><code class="language-sh">cargo xtask themelint onedark # replace onedark with &lt;name&gt;
</code></pre>
<h2 id="the-details-of-theme-creation"><a class="header" href="#the-details-of-theme-creation">The details of theme creation</a></h2>
<h3 id="color-palettes"><a class="header" href="#color-palettes">Color palettes</a></h3>
<p>It's recommended to define a palette of named colors, and refer to them in the
configuration values in your theme. To do this, add a table called
<code>palette</code> to your theme file:</p>
<pre><code class="language-toml">&quot;ui.background&quot; = &quot;white&quot;
&quot;ui.text&quot; = &quot;black&quot;
[palette]
white = &quot;#ffffff&quot;
black = &quot;#000000&quot;
</code></pre>
<p>Keep in mind that the <code>[palette]</code> table includes all keys after its header,
so it should be defined after the normal theme options.</p>
<p>The default palette uses the terminal's default 16 colors, and the colors names
are listed below. The <code>[palette]</code> section in the config file takes precedence
over it and is merged into the default palette.</p>
<div class="table-wrapper"><table><thead><tr><th>Color Name</th></tr></thead><tbody>
<tr><td><code>black</code></td></tr>
<tr><td><code>red</code></td></tr>
<tr><td><code>green</code></td></tr>
<tr><td><code>yellow</code></td></tr>
<tr><td><code>blue</code></td></tr>
<tr><td><code>magenta</code></td></tr>
<tr><td><code>cyan</code></td></tr>
<tr><td><code>gray</code></td></tr>
<tr><td><code>light-red</code></td></tr>
<tr><td><code>light-green</code></td></tr>
<tr><td><code>light-yellow</code></td></tr>
<tr><td><code>light-blue</code></td></tr>
<tr><td><code>light-magenta</code></td></tr>
<tr><td><code>light-cyan</code></td></tr>
<tr><td><code>light-gray</code></td></tr>
<tr><td><code>white</code></td></tr>
</tbody></table>
</div>
<h3 id="modifiers"><a class="header" href="#modifiers">Modifiers</a></h3>
<p>The following values may be used as modifier, provided they are supported by
your terminal emulator.</p>
<div class="table-wrapper"><table><thead><tr><th>Modifier</th></tr></thead><tbody>
<tr><td><code>bold</code></td></tr>
<tr><td><code>dim</code></td></tr>
<tr><td><code>italic</code></td></tr>
<tr><td><code>underlined</code></td></tr>
<tr><td><code>slow_blink</code></td></tr>
<tr><td><code>rapid_blink</code></td></tr>
<tr><td><code>reversed</code></td></tr>
<tr><td><code>hidden</code></td></tr>
<tr><td><code>crossed_out</code></td></tr>
</tbody></table>
</div>
<blockquote>
<p>💡 The <code>underlined</code> modifier is deprecated and only available for backwards compatibility.
Its behavior is equivalent to setting <code>underline.style=&quot;line&quot;</code>.</p>
</blockquote>
<h3 id="underline-style"><a class="header" href="#underline-style">Underline style</a></h3>
<p>One of the following values may be used as a value for <code>underline.style</code>, providing it is
supported by your terminal emulator.</p>
<div class="table-wrapper"><table><thead><tr><th>Modifier</th></tr></thead><tbody>
<tr><td><code>line</code></td></tr>
<tr><td><code>curl</code></td></tr>
<tr><td><code>dashed</code></td></tr>
<tr><td><code>dotted</code></td></tr>
<tr><td><code>double_line</code></td></tr>
</tbody></table>
</div>
<h3 id="inheritance"><a class="header" href="#inheritance">Inheritance</a></h3>
<p>Extend other themes by setting the <code>inherits</code> property to an existing theme.</p>
<pre><code class="language-toml">inherits = &quot;boo_berry&quot;
# Override the theming for &quot;keyword&quot;s:
&quot;keyword&quot; = { fg = &quot;gold&quot; }
# Override colors in the palette:
[palette]
berry = &quot;#2A2A4D&quot;
</code></pre>
<h3 id="scopes"><a class="header" href="#scopes">Scopes</a></h3>
<p>The following is a list of scopes available to use for styling:</p>
<h4 id="syntax-highlighting"><a class="header" href="#syntax-highlighting">Syntax highlighting</a></h4>
<p>These keys match <a href="https://tree-sitter.github.io/tree-sitter/syntax-highlighting#theme">tree-sitter scopes</a>.</p>
<p>When determining styling for a highlight, the longest matching theme key will be used. For example, if the highlight is <code>function.builtin.static</code>, the key <code>function.builtin</code> will be used instead of <code>function</code>.</p>
<p>We use a similar set of scopes as
<a href="https://www.sublimetext.com/docs/scope_naming.html">Sublime Text</a>. See also
<a href="https://macromates.com/manual/en/language_grammars">TextMate</a> scopes.</p>
<ul>
<li>
<p><code>attribute</code> - Class attributes, HTML tag attributes</p>
</li>
<li>
<p><code>type</code> - Types</p>
<ul>
<li><code>builtin</code> - Primitive types provided by the language (<code>int</code>, <code>usize</code>)</li>
<li><code>enum</code>
<ul>
<li><code>variant</code></li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>constructor</code></p>
</li>
<li>
<p><code>constant</code> (TODO: constant.other.placeholder for <code>%v</code>)</p>
<ul>
<li><code>builtin</code> Special constants provided by the language (<code>true</code>, <code>false</code>, <code>nil</code> etc)
<ul>
<li><code>boolean</code></li>
</ul>
</li>
<li><code>character</code>
<ul>
<li><code>escape</code></li>
</ul>
</li>
<li><code>numeric</code> (numbers)
<ul>
<li><code>integer</code></li>
<li><code>float</code></li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>string</code> (TODO: string.quoted.{single, double}, string.raw/.unquoted)?</p>
<ul>
<li><code>regexp</code> - Regular expressions</li>
<li><code>special</code>
<ul>
<li><code>path</code></li>
<li><code>url</code></li>
<li><code>symbol</code> - Erlang/Elixir atoms, Ruby symbols, Clojure keywords</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>comment</code> - Code comments</p>
<ul>
<li><code>line</code> - Single line comments (<code>//</code>)</li>
<li><code>block</code> - Block comments (e.g. (<code>/* */</code>)
<ul>
<li><code>documentation</code> - Documentation comments (e.g. <code>///</code> in Rust)</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>variable</code> - Variables</p>
<ul>
<li><code>builtin</code> - Reserved language variables (<code>self</code>, <code>this</code>, <code>super</code>, etc.)</li>
<li><code>parameter</code> - Function parameters</li>
<li><code>other</code>
<ul>
<li><code>member</code> - Fields of composite data types (e.g. structs, unions)</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>label</code></p>
</li>
<li>
<p><code>punctuation</code></p>
<ul>
<li><code>delimiter</code> - Commas, colons</li>
<li><code>bracket</code> - Parentheses, angle brackets, etc.</li>
<li><code>special</code> - String interpolation brackets.</li>
</ul>
</li>
<li>
<p><code>keyword</code></p>
<ul>
<li><code>control</code>
<ul>
<li><code>conditional</code> - <code>if</code>, <code>else</code></li>
<li><code>repeat</code> - <code>for</code>, <code>while</code>, <code>loop</code></li>
<li><code>import</code> - <code>import</code>, <code>export</code></li>
<li><code>return</code></li>
<li><code>exception</code></li>
</ul>
</li>
<li><code>operator</code> - <code>or</code>, <code>in</code></li>
<li><code>directive</code> - Preprocessor directives (<code>#if</code> in C)</li>
<li><code>function</code> - <code>fn</code>, <code>func</code></li>
<li><code>storage</code> - Keywords describing how things are stored
<ul>
<li><code>type</code> - The type of something, <code>class</code>, <code>function</code>, <code>var</code>, <code>let</code>, etc.</li>
<li><code>modifier</code> - Storage modifiers like <code>static</code>, <code>mut</code>, <code>const</code>, <code>ref</code>, etc.</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>operator</code> - <code>||</code>, <code>+=</code>, <code>&gt;</code></p>
</li>
<li>
<p><code>function</code></p>
<ul>
<li><code>builtin</code></li>
<li><code>method</code></li>
<li><code>macro</code></li>
<li><code>special</code> (preprocessor in C)</li>
</ul>
</li>
<li>
<p><code>tag</code> - Tags (e.g. <code>&lt;body&gt;</code> in HTML)</p>
<ul>
<li><code>builtin</code></li>
</ul>
</li>
<li>
<p><code>namespace</code></p>
</li>
<li>
<p><code>special</code></p>
</li>
<li>
<p><code>markup</code></p>
<ul>
<li><code>heading</code>
<ul>
<li><code>marker</code></li>
<li><code>1</code>, <code>2</code>, <code>3</code>, <code>4</code>, <code>5</code>, <code>6</code> - heading text for h1 through h6</li>
</ul>
</li>
<li><code>list</code>
<ul>
<li><code>unnumbered</code></li>
<li><code>numbered</code></li>
<li><code>checked</code></li>
<li><code>unchecked</code></li>
</ul>
</li>
<li><code>bold</code></li>
<li><code>italic</code></li>
<li><code>strikethrough</code></li>
<li><code>link</code>
<ul>
<li><code>url</code> - URLs pointed to by links</li>
<li><code>label</code> - non-URL link references</li>
<li><code>text</code> - URL and image descriptions in links</li>
</ul>
</li>
<li><code>quote</code></li>
<li><code>raw</code>
<ul>
<li><code>inline</code></li>
<li><code>block</code></li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>diff</code> - version control changes</p>
<ul>
<li><code>plus</code> - additions</li>
<li><code>minus</code> - deletions</li>
<li><code>delta</code> - modifications
<ul>
<li><code>moved</code> - renamed or moved files/changes</li>
</ul>
</li>
</ul>
</li>
</ul>
<h4 id="interface"><a class="header" href="#interface">Interface</a></h4>
<p>These scopes are used for theming the editor interface:</p>
<ul>
<li><code>markup</code>
<ul>
<li><code>normal</code>
<ul>
<li><code>completion</code> - for completion doc popup UI</li>
<li><code>hover</code> - for hover popup UI</li>
</ul>
</li>
<li><code>heading</code>
<ul>
<li><code>completion</code> - for completion doc popup UI</li>
<li><code>hover</code> - for hover popup UI</li>
</ul>
</li>
<li><code>raw</code>
<ul>
<li><code>inline</code>
<ul>
<li><code>completion</code> - for completion doc popup UI</li>
<li><code>hover</code> - for hover popup UI</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Notes</th></tr></thead><tbody>
<tr><td><code>ui.background</code></td><td></td></tr>
<tr><td><code>ui.background.separator</code></td><td>Picker separator below input line</td></tr>
<tr><td><code>ui.cursor</code></td><td></td></tr>
<tr><td><code>ui.cursor.normal</code></td><td></td></tr>
<tr><td><code>ui.cursor.insert</code></td><td></td></tr>
<tr><td><code>ui.cursor.select</code></td><td></td></tr>
<tr><td><code>ui.cursor.match</code></td><td>Matching bracket etc.</td></tr>
<tr><td><code>ui.cursor.primary</code></td><td>Cursor with primary selection</td></tr>
<tr><td><code>ui.cursor.primary.normal</code></td><td></td></tr>
<tr><td><code>ui.cursor.primary.insert</code></td><td></td></tr>
<tr><td><code>ui.cursor.primary.select</code></td><td></td></tr>
<tr><td><code>ui.debug.breakpoint</code></td><td>Breakpoint indicator, found in the gutter</td></tr>
<tr><td><code>ui.debug.active</code></td><td>Indicator for the line at which debugging execution is paused at, found in the gutter</td></tr>
<tr><td><code>ui.gutter</code></td><td>Gutter</td></tr>
<tr><td><code>ui.gutter.selected</code></td><td>Gutter for the line the cursor is on</td></tr>
<tr><td><code>ui.highlight.frameline</code></td><td>Line at which debugging execution is paused at</td></tr>
<tr><td><code>ui.linenr</code></td><td>Line numbers</td></tr>
<tr><td><code>ui.linenr.selected</code></td><td>Line number for the line the cursor is on</td></tr>
<tr><td><code>ui.statusline</code></td><td>Statusline</td></tr>
<tr><td><code>ui.statusline.inactive</code></td><td>Statusline (unfocused document)</td></tr>
<tr><td><code>ui.statusline.normal</code></td><td>Statusline mode during normal mode (<a href="./configuration.html#editor-section">only if <code>editor.color-modes</code> is enabled</a>)</td></tr>
<tr><td><code>ui.statusline.insert</code></td><td>Statusline mode during insert mode (<a href="./configuration.html#editor-section">only if <code>editor.color-modes</code> is enabled</a>)</td></tr>
<tr><td><code>ui.statusline.select</code></td><td>Statusline mode during select mode (<a href="./configuration.html#editor-section">only if <code>editor.color-modes</code> is enabled</a>)</td></tr>
<tr><td><code>ui.statusline.separator</code></td><td>Separator character in statusline</td></tr>
<tr><td><code>ui.popup</code></td><td>Documentation popups (e.g. Space + k)</td></tr>
<tr><td><code>ui.popup.info</code></td><td>Prompt for multiple key options</td></tr>
<tr><td><code>ui.window</code></td><td>Borderlines separating splits</td></tr>
<tr><td><code>ui.help</code></td><td>Description box for commands</td></tr>
<tr><td><code>ui.text</code></td><td>Command prompts, popup text, etc.</td></tr>
<tr><td><code>ui.text.focus</code></td><td></td></tr>
<tr><td><code>ui.text.inactive</code></td><td>Same as <code>ui.text</code> but when the text is inactive (e.g. suggestions)</td></tr>
<tr><td><code>ui.text.info</code></td><td>The key: command text in <code>ui.popup.info</code> boxes</td></tr>
<tr><td><code>ui.virtual.ruler</code></td><td>Ruler columns (see the <a href="./configuration.html#editor-section"><code>editor.rulers</code> config</a>)</td></tr>
<tr><td><code>ui.virtual.whitespace</code></td><td>Visible whitespace characters</td></tr>
<tr><td><code>ui.virtual.indent-guide</code></td><td>Vertical indent width guides</td></tr>
<tr><td><code>ui.virtual.inlay-hint</code></td><td>Default style for inlay hints of all kinds</td></tr>
<tr><td><code>ui.virtual.inlay-hint.parameter</code></td><td>Style for inlay hints of kind <code>parameter</code> (LSPs are not required to set a kind)</td></tr>
<tr><td><code>ui.virtual.inlay-hint.type</code></td><td>Style for inlay hints of kind <code>type</code> (LSPs are not required to set a kind)</td></tr>
<tr><td><code>ui.virtual.wrap</code></td><td>Soft-wrap indicator (see the <a href="./configuration.html#editor-section"><code>editor.soft-wrap</code> config</a>)</td></tr>
<tr><td><code>ui.menu</code></td><td>Code and command completion menus</td></tr>
<tr><td><code>ui.menu.selected</code></td><td>Selected autocomplete item</td></tr>
<tr><td><code>ui.menu.scroll</code></td><td><code>fg</code> sets thumb color, <code>bg</code> sets track color of scrollbar</td></tr>
<tr><td><code>ui.selection</code></td><td>For selections in the editing area</td></tr>
<tr><td><code>ui.selection.primary</code></td><td></td></tr>
<tr><td><code>ui.highlight</code></td><td>Highlighted lines in the picker preview</td></tr>
<tr><td><code>ui.cursorline.primary</code></td><td>The line of the primary cursor (<a href="./configuration.html#editor-section">if cursorline is enabled</a>)</td></tr>
<tr><td><code>ui.cursorline.secondary</code></td><td>The lines of any other cursors (<a href="./configuration.html#editor-section">if cursorline is enabled</a>)</td></tr>
<tr><td><code>ui.cursorcolumn.primary</code></td><td>The column of the primary cursor (<a href="./configuration.html#editor-section">if cursorcolumn is enabled</a>)</td></tr>
<tr><td><code>ui.cursorcolumn.secondary</code></td><td>The columns of any other cursors (<a href="./configuration.html#editor-section">if cursorcolumn is enabled</a>)</td></tr>
<tr><td><code>warning</code></td><td>Diagnostics warning (gutter)</td></tr>
<tr><td><code>error</code></td><td>Diagnostics error (gutter)</td></tr>
<tr><td><code>info</code></td><td>Diagnostics info (gutter)</td></tr>
<tr><td><code>hint</code></td><td>Diagnostics hint (gutter)</td></tr>
<tr><td><code>diagnostic</code></td><td>Diagnostics fallback style (editing area)</td></tr>
<tr><td><code>diagnostic.hint</code></td><td>Diagnostics hint (editing area)</td></tr>
<tr><td><code>diagnostic.info</code></td><td>Diagnostics info (editing area)</td></tr>
<tr><td><code>diagnostic.warning</code></td><td>Diagnostics warning (editing area)</td></tr>
<tr><td><code>diagnostic.error</code></td><td>Diagnostics error (editing area)</td></tr>
</tbody></table>
</div>
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html" class="active">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="helix"><a class="header" href="#helix">Helix</a></h1>
<p>Docs for bleeding edge master can be found at
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<p>See the <a href="./usage.html">usage</a> section for a quick overview of the editor, <a href="./keymap.html">keymap</a>
section for all available keybindings and the <a href="./configuration.html">configuration</a> section
for defining custom keybindings, setting themes, etc.
For everything else (e.g., how to install supported language servers), see the <a href="https://github.com/helix-editor/helix/wiki">Helix Wiki</a>.</p>
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<ol class="chapter"><li class="chapter-item expanded affix "><a href="title-page.html">Helix</a></li><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html" class="active"><strong aria-hidden="true">2.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></li><li class="chapter-item expanded "><a href="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li></ol></li></ol>
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<h1 id="using-helix"><a class="header" href="#using-helix">Using Helix</a></h1>
<!--toc:start-->
<ul>
<li><a href="#registers">Registers</a>
<ul>
<li><a href="#user-defined-registers">User-defined registers</a></li>
<li><a href="#special-registers">Special registers</a></li>
</ul>
</li>
<li><a href="#surround">Surround</a></li>
<li><a href="#selecting-and-manipulating-text-with-textobjects">Selecting and manipulating text with textobjects</a></li>
<li><a href="#navigating-using-tree-sitter-textobjects">Navigating using tree-sitter textobjects</a></li>
<li><a href="#moving-the-selection-with-syntax-aware-motions">Moving the selection with syntax-aware motions</a></li>
</ul>
<!--toc:end-->
<p>For a full interactive introduction to Helix, refer to the
<a href="https://github.com/helix-editor/helix/blob/master/runtime/tutor">tutor</a> which
can be accessed via the command <code>hx --tutor</code> or <code>:tutor</code>.</p>
<blockquote>
<p>💡 Currently, not all functionality is fully documented, please refer to the
<a href="./keymap.html">key mappings</a> list.</p>
</blockquote>
<h2 id="registers"><a class="header" href="#registers">Registers</a></h2>
<p>In Helix, registers are storage locations for text and other data, such as the
result of a search. Registers can be used to cut, copy, and paste text, similar
to the clipboard in other text editors. Usage is similar to Vim, with <code>&quot;</code> being
used to select a register.</p>
<h3 id="user-defined-registers"><a class="header" href="#user-defined-registers">User-defined registers</a></h3>
<p>Helix allows you to create your own named registers for storing text, for
example:</p>
<ul>
<li><code>&quot;ay</code> - Yank the current selection to register <code>a</code>.</li>
<li><code>&quot;op</code> - Paste the text in register <code>o</code> after the selection.</li>
</ul>
<p>If a register is selected before invoking a change or delete command, the selection will be stored in the register and the action will be carried out:</p>
<ul>
<li><code>&quot;hc</code> - Store the selection in register <code>h</code> and then change it (delete and enter insert mode).</li>
<li><code>&quot;md</code> - Store the selection in register <code>m</code> and delete it.</li>
</ul>
<h3 id="special-registers"><a class="header" href="#special-registers">Special registers</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Register character</th><th>Contains</th></tr></thead><tbody>
<tr><td><code>/</code></td><td>Last search</td></tr>
<tr><td><code>:</code></td><td>Last executed command</td></tr>
<tr><td><code>&quot;</code></td><td>Last yanked text</td></tr>
<tr><td><code>_</code></td><td>Black hole</td></tr>
</tbody></table>
</div>
<p>The system clipboard is not directly supported by a special register. Instead, special commands and keybindings are provided. Refer to the
<a href="keymap.html#space-mode">key map</a> for more details.</p>
<p>The black hole register is a no-op register, meaning that no data will be read or written to it.</p>
<h2 id="surround"><a class="header" href="#surround">Surround</a></h2>
<p>Helix includes built-in functionality similar to <a href="https://github.com/tpope/vim-surround">vim-surround</a>.
The keymappings have been inspired from <a href="https://github.com/machakann/vim-sandwich">vim-sandwich</a>:</p>
<p><img src="https://user-images.githubusercontent.com/23398472/122865801-97073180-d344-11eb-8142-8f43809982c6.gif" alt="Surround demo" /></p>
<div class="table-wrapper"><table><thead><tr><th>Key Sequence</th><th>Action</th></tr></thead><tbody>
<tr><td><code>ms&lt;char&gt;</code> (after selecting text)</td><td>Add surround characters to selection</td></tr>
<tr><td><code>mr&lt;char_to_replace&gt;&lt;new_char&gt;</code></td><td>Replace the closest surround characters</td></tr>
<tr><td><code>md&lt;char_to_delete&gt;</code></td><td>Delete the closest surround characters</td></tr>
</tbody></table>
</div>
<p>You can use counts to act on outer pairs.</p>
<p>Surround can also act on multiple selections. For example, to change every occurrence of <code>(use)</code> to <code>[use]</code>:</p>
<ol>
<li><code>%</code> to select the whole file</li>
<li><code>s</code> to split the selections on a search term</li>
<li>Input <code>use</code> and hit Enter</li>
<li><code>mr([</code> to replace the parentheses with square brackets</li>
</ol>
<p>Multiple characters are currently not supported, but planned for future release.</p>
<h2 id="selecting-and-manipulating-text-with-textobjects"><a class="header" href="#selecting-and-manipulating-text-with-textobjects">Selecting and manipulating text with textobjects</a></h2>
<p>In Helix, textobjects are a way to select, manipulate and operate on a piece of
text in a structured way. They allow you to refer to blocks of text based on
their structure or purpose, such as a word, sentence, paragraph, or even a
function or block of code.</p>
<p><img src="https://user-images.githubusercontent.com/23398472/124231131-81a4bb00-db2d-11eb-9d10-8e577ca7b177.gif" alt="Textobject demo" />
<img src="https://user-images.githubusercontent.com/23398472/132537398-2a2e0a54-582b-44ab-a77f-eb818942203d.gif" alt="Textobject tree-sitter demo" /></p>
<ul>
<li><code>ma</code> - Select around the object (<code>va</code> in Vim, <code>&lt;alt-a&gt;</code> in Kakoune)</li>
<li><code>mi</code> - Select inside the object (<code>vi</code> in Vim, <code>&lt;alt-i&gt;</code> in Kakoune)</li>
</ul>
<div class="table-wrapper"><table><thead><tr><th>Key after <code>mi</code> or <code>ma</code></th><th>Textobject selected</th></tr></thead><tbody>
<tr><td><code>w</code></td><td>Word</td></tr>
<tr><td><code>W</code></td><td>WORD</td></tr>
<tr><td><code>p</code></td><td>Paragraph</td></tr>
<tr><td><code>(</code>, <code>[</code>, <code>'</code>, etc.</td><td>Specified surround pairs</td></tr>
<tr><td><code>m</code></td><td>The closest surround pair</td></tr>
<tr><td><code>f</code></td><td>Function</td></tr>
<tr><td><code>c</code></td><td>Class</td></tr>
<tr><td><code>a</code></td><td>Argument/parameter</td></tr>
<tr><td><code>o</code></td><td>Comment</td></tr>
<tr><td><code>t</code></td><td>Test</td></tr>
<tr><td><code>g</code></td><td>Change</td></tr>
</tbody></table>
</div>
<blockquote>
<p>💡 <code>f</code>, <code>c</code>, etc. need a tree-sitter grammar active for the current
document and a special tree-sitter query file to work properly. <a href="./lang-support.html">Only
some grammars</a> currently have the query file implemented.
Contributions are welcome!</p>
</blockquote>
<h2 id="navigating-using-tree-sitter-textobjects"><a class="header" href="#navigating-using-tree-sitter-textobjects">Navigating using tree-sitter textobjects</a></h2>
<p>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 <code>]f</code>, to move to previous
class use <code>[c</code>, and so on.</p>
<p><img src="https://user-images.githubusercontent.com/23398472/152332550-7dfff043-36a2-4aec-b8f2-77c13eb56d6f.gif" alt="Tree-sitter-nav-demo" /></p>
<p>For the full reference see the <a href="./keymap.html#unimpaired">unimpaired</a> section of the key bind
documentation.</p>
<blockquote>
<p>💡 This feature relies on tree-sitter textobjects
and requires the corresponding query file to work properly.</p>
</blockquote>
<h2 id="moving-the-selection-with-syntax-aware-motions"><a class="header" href="#moving-the-selection-with-syntax-aware-motions">Moving the selection with syntax-aware motions</a></h2>
<p><code>Alt-p</code>, <code>Alt-o</code>, <code>Alt-i</code>, and <code>Alt-n</code> (or <code>Alt</code> and arrow keys) allow you to move the
selection according to its location in the syntax tree. For example, many languages have the
following syntax for function calls:</p>
<pre><code class="language-js">func(arg1, arg2, arg3);
</code></pre>
<p>A function call might be parsed by tree-sitter into a tree like the following.</p>
<pre><code class="language-tsq">(call
function: (identifier) ; func
arguments:
(arguments ; (arg1, arg2, arg3)
(identifier) ; arg1
(identifier) ; arg2
(identifier))) ; arg3
</code></pre>
<p>Use <code>:tree-sitter-subtree</code> to view the syntax tree of the primary selection. In
a more intuitive tree format:</p>
<pre><code> ┌────┐
│call│
┌─────┴────┴─────┐
│ │
┌─────▼────┐ ┌────▼────┐
│identifier│ │arguments│
│ &quot;func&quot; │ ┌────┴───┬─────┴───┐
└──────────┘ │ │ │
│ │ │
┌─────────▼┐ ┌────▼─────┐ ┌▼─────────┐
│identifier│ │identifier│ │identifier│
│ &quot;arg1&quot; │ │ &quot;arg2&quot; │ │ &quot;arg3&quot; │
└──────────┘ └──────────┘ └──────────┘
</code></pre>
<p>If you have a selection that wraps <code>arg1</code> (see the tree above), and you use
<code>Alt-n</code>, it will select the next sibling in the syntax tree: <code>arg2</code>.</p>
<pre><code class="language-js">// before
func([arg1], arg2, arg3)
// after
func(arg1, [arg2], arg3);
</code></pre>
<p>Similarly, <code>Alt-o</code> will expand the selection to the parent node, in this case, the
arguments node.</p>
<pre><code class="language-js">func[(arg1, arg2, arg3)];
</code></pre>
<p>There is also some nuanced behavior that prevents you from getting stuck on a
node with no sibling. When using <code>Alt-p</code> with a selection on <code>arg1</code>, the previous
child node will be selected. In the event that <code>arg1</code> does not have a previous
sibling, the selection will move up the syntax tree and select the previous
element. As a result, using <code>Alt-p</code> with a selection on <code>arg1</code> will move the
selection to the &quot;func&quot; <code>identifier</code>.</p>
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