Add cursorcolumn (#4084)

* Implement cursorcolumn

* Add documentation

* Separate column style from line with fallback

* Fallback to cursorcolumn first

* Switch to non-fallback try_get_exact

Add new function `try_get_exact`, which doesn't perform fallback,
and use that instead because the fallback behaviour is being handled
manually.
pull/4160/head
A-Walrus 2 years ago committed by GitHub
parent 18cfe864f4
commit c15f1ea274
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@ -45,6 +45,7 @@ on unix operating systems.
| `shell` | Shell to use when running external commands. | Unix: `["sh", "-c"]`<br/>Windows: `["cmd", "/C"]` |
| `line-number` | Line number display: `absolute` simply shows each line's number, while `relative` shows the distance from the current line. When unfocused or in insert mode, `relative` will still show absolute line numbers. | `absolute` |
| `cursorline` | Highlight all lines with a cursor. | `false` |
| `cursorcolumn` | Highlight all columns with a cursor. | `false` |
| `gutters` | Gutters to display: Available are `diagnostics` and `line-numbers` and `spacer`, note that `diagnostics` also includes other features like breakpoints, 1-width padding will be inserted if gutters is non-empty | `["diagnostics", "line-numbers"]` |
| `auto-completion` | Enable automatic pop up of auto-completion. | `true` |
| `auto-format` | Enable automatic formatting on save. | `true` |

@ -259,8 +259,10 @@ These scopes are used for theming the editor interface.
| `ui.menu.scroll` | `fg` sets thumb color, `bg` sets track color of scrollbar |
| `ui.selection` | For selections in the editing area |
| `ui.selection.primary` | |
| `ui.cursorline.primary` | The line of the primary cursor |
| `ui.cursorline.secondary` | The lines of any other cursors |
| `ui.cursorline.primary` | The line of the primary cursor ([if cursorline is enabled][editor-section]) |
| `ui.cursorline.secondary` | The lines of any other cursors ([if cursorline is enabled][editor-section]) |
| `ui.cursorcolumn.primary` | The column of the primary cursor ([if cursorcolumn is enabled][editor-section]) |
| `ui.cursorcolumn.secondary` | The columns of any other cursors ([if cursorcolumn is enabled][editor-section]) |
| `warning` | Diagnostics warning (gutter) |
| `error` | Diagnostics error (gutter) |
| `info` | Diagnostics info (gutter) |

@ -13,7 +13,7 @@ use helix_core::{
movement::Direction,
syntax::{self, HighlightEvent},
unicode::width::UnicodeWidthStr,
LineEnding, Position, Range, Selection, Transaction,
visual_coords_at_pos, LineEnding, Position, Range, Selection, Transaction,
};
use helix_view::{
document::{Mode, SCRATCH_BUFFER_NAME},
@ -118,6 +118,9 @@ impl EditorView {
if is_focused && editor.config().cursorline {
Self::highlight_cursorline(doc, view, surface, theme);
}
if is_focused && editor.config().cursorcolumn {
Self::highlight_cursorcolumn(doc, view, surface, theme);
}
let highlights = Self::doc_syntax_highlights(doc, view.offset, inner.height, theme);
let highlights = syntax::merge(highlights, Self::doc_diagnostics_highlights(doc, theme));
@ -830,6 +833,53 @@ impl EditorView {
}
}
/// Apply the highlighting on the columns where a cursor is active
pub fn highlight_cursorcolumn(
doc: &Document,
view: &View,
surface: &mut Surface,
theme: &Theme,
) {
let text = doc.text().slice(..);
// Manual fallback behaviour:
// ui.cursorcolumn.{p/s} -> ui.cursorcolumn -> ui.cursorline.{p/s}
let primary_style = theme
.try_get_exact("ui.cursorcolumn.primary")
.or_else(|| theme.try_get_exact("ui.cursorcolumn"))
.unwrap_or_else(|| theme.get("ui.cursorline.primary"));
let secondary_style = theme
.try_get_exact("ui.cursorcolumn.secondary")
.or_else(|| theme.try_get_exact("ui.cursorcolumn"))
.unwrap_or_else(|| theme.get("ui.cursorline.secondary"));
let inner_area = view.inner_area();
let offset = view.offset.col;
let selection = doc.selection(view.id);
let primary = selection.primary();
for range in selection.iter() {
let is_primary = primary == *range;
let Position { row: _, col } =
visual_coords_at_pos(text, range.cursor(text), doc.tab_width());
// if the cursor is horizontally in the view
if col >= offset && inner_area.width > (col - offset) as u16 {
let area = Rect::new(
inner_area.x + (col - offset) as u16,
view.area.y,
1,
view.area.height,
);
if is_primary {
surface.set_style(area, primary_style)
} else {
surface.set_style(area, secondary_style)
}
}
}
}
/// Handle events by looking them up in `self.keymaps`. Returns None
/// if event was handled (a command was executed or a subkeymap was
/// activated). Only KeymapResult::{NotFound, Cancelled} is returned

@ -124,6 +124,8 @@ pub struct Config {
pub line_number: LineNumber,
/// Highlight the lines cursors are currently on. Defaults to false.
pub cursorline: bool,
/// Highlight the columns cursors are currently on. Defaults to false.
pub cursorcolumn: bool,
/// Gutters. Default ["diagnostics", "line-numbers"]
pub gutters: Vec<GutterType>,
/// Middle click paste support. Defaults to true.
@ -582,6 +584,7 @@ impl Default for Config {
},
line_number: LineNumber::Absolute,
cursorline: false,
cursorcolumn: false,
gutters: vec![GutterType::Diagnostics, GutterType::LineNumbers],
middle_click_paste: true,
auto_pairs: AutoPairConfig::default(),

@ -277,6 +277,13 @@ impl Theme {
.find_map(|s| self.styles.get(s).copied())
}
/// Get the style of a scope, without falling back to dot separated broader
/// scopes. For example if `ui.text.focus` is not defined in the theme, it
/// will return `None`, even if `ui.text` is.
pub fn try_get_exact(&self, scope: &str) -> Option<Style> {
self.styles.get(scope).copied()
}
#[inline]
pub fn scopes(&self) -> &[String] {
&self.scopes

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