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editor.rs
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editor.rs
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use crate::{
commands::{self, OnKeyCallback},
compositor::{Component, Context, Event, EventResult},
job::{self, Callback},
key,
keymap::{KeymapResult, Keymaps},
ui::{
document::{render_document, LinePos, TextRenderer, TranslatedPosition},
Completion, ProgressSpinners,
},
};
use helix_core::{
diagnostic::NumberOrString,
graphemes::{
ensure_grapheme_boundary_next_byte, next_grapheme_boundary, prev_grapheme_boundary,
},
movement::Direction,
syntax::{self, HighlightEvent},
text_annotations::TextAnnotations,
unicode::width::UnicodeWidthStr,
visual_offset_from_block, Position, Range, Selection, Transaction,
};
use helix_view::{
document::{Mode, SavePoint, SCRATCH_BUFFER_NAME},
editor::{CompleteAction, CursorShapeConfig},
graphics::{Color, CursorKind, Modifier, Rect, Style},
input::{KeyEvent, MouseButton, MouseEvent, MouseEventKind},
keyboard::{KeyCode, KeyModifiers},
Document, Editor, Theme, View,
};
use std::{mem::take, num::NonZeroUsize, path::PathBuf, rc::Rc, sync::Arc};
use tui::{buffer::Buffer as Surface, text::Span};
use super::statusline;
use super::{document::LineDecoration, lsp::SignatureHelp};
pub struct EditorView {
pub keymaps: Keymaps,
on_next_key: Option<OnKeyCallback>,
pseudo_pending: Vec<KeyEvent>,
pub(crate) last_insert: (commands::MappableCommand, Vec<InsertEvent>),
pub(crate) completion: Option<Completion>,
spinners: ProgressSpinners,
}
#[derive(Debug, Clone)]
pub enum InsertEvent {
Key(KeyEvent),
CompletionApply(CompleteAction),
TriggerCompletion,
RequestCompletion,
}
impl Default for EditorView {
fn default() -> Self {
Self::new(Keymaps::default())
}
}
impl EditorView {
pub fn new(keymaps: Keymaps) -> Self {
Self {
keymaps,
on_next_key: None,
pseudo_pending: Vec::new(),
last_insert: (commands::MappableCommand::normal_mode, Vec::new()),
completion: None,
spinners: ProgressSpinners::default(),
}
}
pub fn spinners_mut(&mut self) -> &mut ProgressSpinners {
&mut self.spinners
}
pub fn render_view(
&self,
editor: &Editor,
doc: &Document,
view: &View,
viewport: Rect,
surface: &mut Surface,
is_focused: bool,
) {
let inner = view.inner_area(doc);
let area = view.area;
let theme = &editor.theme;
let config = editor.config();
let text_annotations = view.text_annotations(doc, Some(theme));
let mut line_decorations: Vec<Box<dyn LineDecoration>> = Vec::new();
let mut translated_positions: Vec<TranslatedPosition> = Vec::new();
if is_focused && config.cursorline {
line_decorations.push(Self::cursorline_decorator(doc, view, theme))
}
if is_focused && config.cursorcolumn {
Self::highlight_cursorcolumn(doc, view, surface, theme, inner, &text_annotations);
}
// Set DAP highlights, if needed.
if let Some(frame) = editor.current_stack_frame() {
let dap_line = frame.line.saturating_sub(1) as usize;
let style = theme.get("ui.highlight.frameline");
let line_decoration = move |renderer: &mut TextRenderer, pos: LinePos| {
if pos.doc_line != dap_line {
return;
}
renderer.surface.set_style(
Rect::new(inner.x, inner.y + pos.visual_line, inner.width, 1),
style,
);
};
line_decorations.push(Box::new(line_decoration));
}
let mut highlights =
Self::doc_syntax_highlights(doc, view.offset.anchor, inner.height, theme);
let overlay_highlights = Self::overlay_syntax_highlights(
doc,
view.offset.anchor,
inner.height,
&text_annotations,
);
if !overlay_highlights.is_empty() {
highlights = Box::new(syntax::merge(highlights, overlay_highlights));
}
for diagnostic in Self::doc_diagnostics_highlights(doc, theme) {
// Most of the `diagnostic` Vecs are empty most of the time. Skipping
// a merge for any empty Vec saves a significant amount of work.
if diagnostic.is_empty() {
continue;
}
highlights = Box::new(syntax::merge(highlights, diagnostic));
}
let highlights: Box<dyn Iterator<Item = HighlightEvent>> = if is_focused {
let highlights = syntax::merge(
highlights,
Self::doc_selection_highlights(
editor.mode(),
doc,
view,
theme,
&config.cursor_shape,
),
);
let focused_view_elements = Self::highlight_focused_view_elements(view, doc, theme);
if focused_view_elements.is_empty() {
Box::new(highlights)
} else {
Box::new(syntax::merge(highlights, focused_view_elements))
}
} else {
Box::new(highlights)
};
Self::render_gutter(
editor,
doc,
view,
view.area,
theme,
is_focused,
&mut line_decorations,
);
if is_focused {
let cursor = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
// set the cursor_cache to out of view in case the position is not found
editor.cursor_cache.set(Some(None));
let update_cursor_cache =
|_: &mut TextRenderer, pos| editor.cursor_cache.set(Some(Some(pos)));
translated_positions.push((cursor, Box::new(update_cursor_cache)));
}
render_document(
surface,
inner,
doc,
view.offset,
&text_annotations,
highlights,
theme,
&mut line_decorations,
&mut translated_positions,
);
Self::render_rulers(editor, doc, view, inner, surface, theme);
// if we're not at the edge of the screen, draw a right border
if viewport.right() != view.area.right() {
let x = area.right();
let border_style = theme.get("ui.window");
for y in area.top()..area.bottom() {
surface[(x, y)]
.set_symbol(tui::symbols::line::VERTICAL)
//.set_symbol(" ")
.set_style(border_style);
}
}
Self::render_diagnostics(doc, view, inner, surface, theme);
let statusline_area = view
.area
.clip_top(view.area.height.saturating_sub(1))
.clip_bottom(1); // -1 from bottom to remove commandline
let mut context =
statusline::RenderContext::new(editor, doc, view, is_focused, &self.spinners);
statusline::render(&mut context, statusline_area, surface);
}
pub fn render_rulers(
editor: &Editor,
doc: &Document,
view: &View,
viewport: Rect,
surface: &mut Surface,
theme: &Theme,
) {
let editor_rulers = &editor.config().rulers;
let ruler_theme = theme
.try_get("ui.virtual.ruler")
.unwrap_or_else(|| Style::default().bg(Color::Red));
let rulers = doc
.language_config()
.and_then(|config| config.rulers.as_ref())
.unwrap_or(editor_rulers);
rulers
.iter()
// View might be horizontally scrolled, convert from absolute distance
// from the 1st column to relative distance from left of viewport
.filter_map(|ruler| ruler.checked_sub(1 + view.offset.horizontal_offset as u16))
.filter(|ruler| ruler < &viewport.width)
.map(|ruler| viewport.clip_left(ruler).with_width(1))
.for_each(|area| surface.set_style(area, ruler_theme))
}
pub fn overlay_syntax_highlights(
doc: &Document,
anchor: usize,
height: u16,
text_annotations: &TextAnnotations,
) -> Vec<(usize, std::ops::Range<usize>)> {
let text = doc.text().slice(..);
let row = text.char_to_line(anchor.min(text.len_chars()));
let range = {
// Calculate viewport byte ranges:
// Saturating subs to make it inclusive zero indexing.
let last_line = text.len_lines().saturating_sub(1);
let last_visible_line = (row + height as usize).saturating_sub(1).min(last_line);
let start = text.line_to_byte(row.min(last_line));
let end = text.line_to_byte(last_visible_line + 1);
start..end
};
text_annotations.collect_overlay_highlights(range)
}
/// Get syntax highlights for a document in a view represented by the first line
/// and column (`offset`) and the last line. This is done instead of using a view
/// directly to enable rendering syntax highlighted docs anywhere (eg. picker preview)
pub fn doc_syntax_highlights<'doc>(
doc: &'doc Document,
anchor: usize,
height: u16,
_theme: &Theme,
) -> Box<dyn Iterator<Item = HighlightEvent> + 'doc> {
let text = doc.text().slice(..);
let row = text.char_to_line(anchor.min(text.len_chars()));
let range = {
// Calculate viewport byte ranges:
// Saturating subs to make it inclusive zero indexing.
let last_line = text.len_lines().saturating_sub(1);
let last_visible_line = (row + height as usize).saturating_sub(1).min(last_line);
let start = text.line_to_byte(row.min(last_line));
let end = text.line_to_byte(last_visible_line + 1);
start..end
};
match doc.syntax() {
Some(syntax) => {
let iter = syntax
// TODO: range doesn't actually restrict source, just highlight range
.highlight_iter(text.slice(..), Some(range), None)
.map(|event| event.unwrap())
.map(move |event| match event {
// TODO: use byte slices directly
// convert byte offsets to char offset
HighlightEvent::Source { start, end } => {
let start =
text.byte_to_char(ensure_grapheme_boundary_next_byte(text, start));
let end =
text.byte_to_char(ensure_grapheme_boundary_next_byte(text, end));
HighlightEvent::Source { start, end }
}
event => event,
});
Box::new(iter)
}
None => Box::new(
[HighlightEvent::Source {
start: text.byte_to_char(range.start),
end: text.byte_to_char(range.end),
}]
.into_iter(),
),
}
}
/// Get highlight spans for document diagnostics
pub fn doc_diagnostics_highlights(
doc: &Document,
theme: &Theme,
) -> [Vec<(usize, std::ops::Range<usize>)>; 5] {
use helix_core::diagnostic::Severity;
let get_scope_of = |scope| {
theme
.find_scope_index_exact(scope)
// get one of the themes below as fallback values
.or_else(|| theme.find_scope_index_exact("diagnostic"))
.or_else(|| theme.find_scope_index_exact("ui.cursor"))
.or_else(|| theme.find_scope_index_exact("ui.selection"))
.expect(
"at least one of the following scopes must be defined in the theme: `diagnostic`, `ui.cursor`, or `ui.selection`",
)
};
// basically just queries the theme color defined in the config
let hint = get_scope_of("diagnostic.hint");
let info = get_scope_of("diagnostic.info");
let warning = get_scope_of("diagnostic.warning");
let error = get_scope_of("diagnostic.error");
let r#default = get_scope_of("diagnostic"); // this is a bit redundant but should be fine
let mut default_vec: Vec<(usize, std::ops::Range<usize>)> = Vec::new();
let mut info_vec = Vec::new();
let mut hint_vec = Vec::new();
let mut warning_vec = Vec::new();
let mut error_vec = Vec::new();
for diagnostic in doc.diagnostics() {
// Separate diagnostics into different Vecs by severity.
let (vec, scope) = match diagnostic.severity {
Some(Severity::Info) => (&mut info_vec, info),
Some(Severity::Hint) => (&mut hint_vec, hint),
Some(Severity::Warning) => (&mut warning_vec, warning),
Some(Severity::Error) => (&mut error_vec, error),
_ => (&mut default_vec, r#default),
};
// If any diagnostic overlaps ranges with the prior diagnostic,
// merge the two together. Otherwise push a new span.
match vec.last_mut() {
Some((_, range)) if diagnostic.range.start <= range.end => {
// This branch merges overlapping diagnostics, assuming that the current
// diagnostic starts on range.start or later. If this assertion fails,
// we will discard some part of `diagnostic`. This implies that
// `doc.diagnostics()` is not sorted by `diagnostic.range`.
debug_assert!(range.start <= diagnostic.range.start);
range.end = diagnostic.range.end.max(range.end)
}
_ => vec.push((scope, diagnostic.range.start..diagnostic.range.end)),
}
}
[default_vec, info_vec, hint_vec, warning_vec, error_vec]
}
/// Get highlight spans for selections in a document view.
pub fn doc_selection_highlights(
mode: Mode,
doc: &Document,
view: &View,
theme: &Theme,
cursor_shape_config: &CursorShapeConfig,
) -> Vec<(usize, std::ops::Range<usize>)> {
let text = doc.text().slice(..);
let selection = doc.selection(view.id);
let primary_idx = selection.primary_index();
let cursorkind = cursor_shape_config.from_mode(mode);
let cursor_is_block = cursorkind == CursorKind::Block;
let selection_scope = theme
.find_scope_index_exact("ui.selection")
.expect("could not find `ui.selection` scope in the theme!");
let primary_selection_scope = theme
.find_scope_index_exact("ui.selection.primary")
.unwrap_or(selection_scope);
let base_cursor_scope = theme
.find_scope_index_exact("ui.cursor")
.unwrap_or(selection_scope);
let base_primary_cursor_scope = theme
.find_scope_index("ui.cursor.primary")
.unwrap_or(base_cursor_scope);
let cursor_scope = match mode {
Mode::Insert => theme.find_scope_index_exact("ui.cursor.insert"),
Mode::Select => theme.find_scope_index_exact("ui.cursor.select"),
Mode::Normal => theme.find_scope_index_exact("ui.cursor.normal"),
}
.unwrap_or(base_cursor_scope);
let primary_cursor_scope = match mode {
Mode::Insert => theme.find_scope_index_exact("ui.cursor.primary.insert"),
Mode::Select => theme.find_scope_index_exact("ui.cursor.primary.select"),
Mode::Normal => theme.find_scope_index_exact("ui.cursor.primary.normal"),
}
.unwrap_or(base_primary_cursor_scope);
let mut spans: Vec<(usize, std::ops::Range<usize>)> = Vec::new();
for (i, range) in selection.iter().enumerate() {
let selection_is_primary = i == primary_idx;
let (cursor_scope, selection_scope) = if selection_is_primary {
(primary_cursor_scope, primary_selection_scope)
} else {
(cursor_scope, selection_scope)
};
// Special-case: cursor at end of the rope.
if range.head == range.anchor && range.head == text.len_chars() {
if !selection_is_primary || cursor_is_block {
// Bar and underline cursors are drawn by the terminal
// BUG: If the editor area loses focus while having a bar or
// underline cursor (eg. when a regex prompt has focus) then
// the primary cursor will be invisible. This doesn't happen
// with block cursors since we manually draw *all* cursors.
spans.push((cursor_scope, range.head..range.head + 1));
}
continue;
}
let range = range.min_width_1(text);
if range.head > range.anchor {
// Standard case.
let cursor_start = prev_grapheme_boundary(text, range.head);
// non block cursors look like they exclude the cursor
let selection_end =
if selection_is_primary && !cursor_is_block && mode != Mode::Insert {
range.head
} else {
cursor_start
};
spans.push((selection_scope, range.anchor..selection_end));
if !selection_is_primary || cursor_is_block {
spans.push((cursor_scope, cursor_start..range.head));
}
} else {
// Reverse case.
let cursor_end = next_grapheme_boundary(text, range.head);
if !selection_is_primary || cursor_is_block {
spans.push((cursor_scope, range.head..cursor_end));
}
// non block cursors look like they exclude the cursor
let selection_start = if selection_is_primary
&& !cursor_is_block
&& !(mode == Mode::Insert && cursor_end == range.anchor)
{
range.head
} else {
cursor_end
};
spans.push((selection_scope, selection_start..range.anchor));
}
}
spans
}
/// Render brace match, etc (meant for the focused view only)
pub fn highlight_focused_view_elements(
view: &View,
doc: &Document,
theme: &Theme,
) -> Vec<(usize, std::ops::Range<usize>)> {
// Highlight matching braces
if let Some(syntax) = doc.syntax() {
let text = doc.text().slice(..);
use helix_core::match_brackets;
let pos = doc.selection(view.id).primary().cursor(text);
if let Some(pos) = match_brackets::find_matching_bracket(syntax, doc.text(), pos) {
// ensure col is on screen
if let Some(highlight) = theme.find_scope_index_exact("ui.cursor.match") {
return vec![(highlight, pos..pos + 1)];
}
}
}
Vec::new()
}
/// Render bufferline at the top
pub fn render_bufferline(editor: &Editor, viewport: Rect, surface: &mut Surface) {
let scratch = PathBuf::from(SCRATCH_BUFFER_NAME); // default filename to use for scratch buffer
surface.clear_with(
viewport,
editor
.theme
.try_get("ui.bufferline.background")
.unwrap_or_else(|| editor.theme.get("ui.statusline")),
);
let bufferline_active = editor
.theme
.try_get("ui.bufferline.active")
.unwrap_or_else(|| editor.theme.get("ui.statusline.active"));
let bufferline_inactive = editor
.theme
.try_get("ui.bufferline")
.unwrap_or_else(|| editor.theme.get("ui.statusline.inactive"));
let mut x = viewport.x;
let current_doc = view!(editor).doc;
for doc in editor.documents() {
let fname = doc
.path()
.unwrap_or(&scratch)
.file_name()
.unwrap_or_default()
.to_str()
.unwrap_or_default();
let style = if current_doc == doc.id() {
bufferline_active
} else {
bufferline_inactive
};
let text = format!(" {}{} ", fname, if doc.is_modified() { "[+]" } else { "" });
let used_width = viewport.x.saturating_sub(x);
let rem_width = surface.area.width.saturating_sub(used_width);
x = surface
.set_stringn(x, viewport.y, text, rem_width as usize, style)
.0;
if x >= surface.area.right() {
break;
}
}
}
pub fn render_gutter<'d>(
editor: &'d Editor,
doc: &'d Document,
view: &View,
viewport: Rect,
theme: &Theme,
is_focused: bool,
line_decorations: &mut Vec<Box<(dyn LineDecoration + 'd)>>,
) {
let text = doc.text().slice(..);
let cursors: Rc<[_]> = doc
.selection(view.id)
.iter()
.map(|range| range.cursor_line(text))
.collect();
let mut offset = 0;
let gutter_style = theme.get("ui.gutter");
let gutter_selected_style = theme.get("ui.gutter.selected");
let gutter_style_virtual = theme.get("ui.gutter.virtual");
let gutter_selected_style_virtual = theme.get("ui.gutter.selected.virtual");
for gutter_type in view.gutters() {
let mut gutter = gutter_type.style(editor, doc, view, theme, is_focused);
let width = gutter_type.width(view, doc);
// avoid lots of small allocations by reusing a text buffer for each line
let mut text = String::with_capacity(width);
let cursors = cursors.clone();
let gutter_decoration = move |renderer: &mut TextRenderer, pos: LinePos| {
// TODO handle softwrap in gutters
let selected = cursors.contains(&pos.doc_line);
let x = viewport.x + offset;
let y = viewport.y + pos.visual_line;
let gutter_style = match (selected, pos.first_visual_line) {
(false, true) => gutter_style,
(true, true) => gutter_selected_style,
(false, false) => gutter_style_virtual,
(true, false) => gutter_selected_style_virtual,
};
if let Some(style) =
gutter(pos.doc_line, selected, pos.first_visual_line, &mut text)
{
renderer
.surface
.set_stringn(x, y, &text, width, gutter_style.patch(style));
} else {
renderer.surface.set_style(
Rect {
x,
y,
width: width as u16,
height: 1,
},
gutter_style,
);
}
text.clear();
};
line_decorations.push(Box::new(gutter_decoration));
offset += width as u16;
}
}
pub fn render_diagnostics(
doc: &Document,
view: &View,
viewport: Rect,
surface: &mut Surface,
theme: &Theme,
) {
use helix_core::diagnostic::Severity;
use tui::{
layout::Alignment,
text::Text,
widgets::{Paragraph, Widget, Wrap},
};
let cursor = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
let diagnostics = doc.diagnostics().iter().filter(|diagnostic| {
diagnostic.range.start <= cursor && diagnostic.range.end >= cursor
});
let warning = theme.get("warning");
let error = theme.get("error");
let info = theme.get("info");
let hint = theme.get("hint");
let mut lines = Vec::new();
let background_style = theme.get("ui.background");
for diagnostic in diagnostics {
let style = Style::reset()
.patch(background_style)
.patch(match diagnostic.severity {
Some(Severity::Error) => error,
Some(Severity::Warning) | None => warning,
Some(Severity::Info) => info,
Some(Severity::Hint) => hint,
});
let text = Text::styled(&diagnostic.message, style);
lines.extend(text.lines);
let code = diagnostic.code.as_ref().map(|x| match x {
NumberOrString::Number(n) => format!("({n})"),
NumberOrString::String(s) => format!("({s})"),
});
if let Some(code) = code {
let span = Span::styled(code, style);
lines.push(span.into());
}
}
let paragraph = Paragraph::new(lines)
.alignment(Alignment::Right)
.wrap(Wrap { trim: true });
let width = 100.min(viewport.width);
let height = 15.min(viewport.height);
paragraph.render(
Rect::new(viewport.right() - width, viewport.y + 1, width, height),
surface,
);
}
/// Apply the highlighting on the lines where a cursor is active
pub fn cursorline_decorator(
doc: &Document,
view: &View,
theme: &Theme,
) -> Box<dyn LineDecoration> {
let text = doc.text().slice(..);
// TODO only highlight the visual line that contains the cursor instead of the full visual line
let primary_line = doc.selection(view.id).primary().cursor_line(text);
// The secondary_lines do contain the primary_line, it doesn't matter
// as the else-if clause in the loop later won't test for the
// secondary_lines if primary_line == line.
// It's used inside a loop so the collect isn't needless:
// https://github.com/rust-lang/rust-clippy/issues/6164
#[allow(clippy::needless_collect)]
let secondary_lines: Vec<_> = doc
.selection(view.id)
.iter()
.map(|range| range.cursor_line(text))
.collect();
let primary_style = theme.get("ui.cursorline.primary");
let secondary_style = theme.get("ui.cursorline.secondary");
let viewport = view.area;
let line_decoration = move |renderer: &mut TextRenderer, pos: LinePos| {
let area = Rect::new(viewport.x, viewport.y + pos.visual_line, viewport.width, 1);
if primary_line == pos.doc_line {
renderer.surface.set_style(area, primary_style);
} else if secondary_lines.binary_search(&pos.doc_line).is_ok() {
renderer.surface.set_style(area, secondary_style);
}
};
Box::new(line_decoration)
}
/// Apply the highlighting on the columns where a cursor is active
pub fn highlight_cursorcolumn(
doc: &Document,
view: &View,
surface: &mut Surface,
theme: &Theme,
viewport: Rect,
text_annotations: &TextAnnotations,
) {
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(doc);
let selection = doc.selection(view.id);
let primary = selection.primary();
let text_format = doc.text_format(viewport.width, None);
for range in selection.iter() {
let is_primary = primary == *range;
let cursor = range.cursor(text);
let Position { col, .. } =
visual_offset_from_block(text, cursor, cursor, &text_format, text_annotations).0;
// if the cursor is horizontally in the view
if col >= view.offset.horizontal_offset
&& inner_area.width > (col - view.offset.horizontal_offset) as u16
{
let area = Rect::new(
inner_area.x + (col - view.offset.horizontal_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
/// otherwise.
fn handle_keymap_event(
&mut self,
mode: Mode,
cxt: &mut commands::Context,
event: KeyEvent,
) -> Option<KeymapResult> {
let mut last_mode = mode;
self.pseudo_pending.extend(self.keymaps.pending());
let key_result = self.keymaps.get(mode, event);
cxt.editor.autoinfo = self.keymaps.sticky().map(|node| node.infobox());
let mut execute_command = |command: &commands::MappableCommand| {
command.execute(cxt);
let current_mode = cxt.editor.mode();
match (last_mode, current_mode) {
(Mode::Normal, Mode::Insert) => {
// HAXX: if we just entered insert mode from normal, clear key buf
// and record the command that got us into this mode.
// how we entered insert mode is important, and we should track that so
// we can repeat the side effect.
self.last_insert.0 = command.clone();
self.last_insert.1.clear();
commands::signature_help_impl(cxt, commands::SignatureHelpInvoked::Automatic);
}
(Mode::Insert, Mode::Normal) => {
// if exiting insert mode, remove completion
self.completion = None;
cxt.editor.completion_request_handle = None;
// TODO: Use an on_mode_change hook to remove signature help
cxt.jobs.callback(async {
let call: job::Callback =
Callback::EditorCompositor(Box::new(|_editor, compositor| {
compositor.remove(SignatureHelp::ID);
}));
Ok(call)
});
}
_ => (),
}
last_mode = current_mode;
};
match key_result {
KeymapResult::Matched(command) => {
execute_command(&command);
}
KeymapResult::Pending(node) => cxt.editor.autoinfo = Some(node.infobox()),
KeymapResult::MatchedSequence(commands) => {
for command in commands {
execute_command(&command);
}
}
KeymapResult::NotFound => return Some(key_result),
KeymapResult::Cancelled(mut pending) => {
if !matches!(
self.handle_keymap_event(mode, cxt, event),
Some(KeymapResult::NotFound)
) {
pending.pop();
}
return Some(KeymapResult::Cancelled(pending));
}
}
None
}
fn insert_mode(&mut self, cx: &mut commands::Context, event: KeyEvent) {
if let Some(keyresult) = self.handle_keymap_event(Mode::Insert, cx, event) {
match keyresult {
KeymapResult::NotFound => {
if let Some(ch) = event.char() {
commands::insert::insert_char(cx, ch)
}
}
KeymapResult::Cancelled(pending) => {
for ev in pending {
match ev.char() {
Some(ch) => commands::insert::insert_char(cx, ch),
None => {
if let KeymapResult::Matched(command) =
self.keymaps.get(Mode::Insert, ev)
{
command.execute(cx);
}
}
}
}
}
_ => unreachable!(),
}
}
}
fn command_mode(&mut self, mode: Mode, cxt: &mut commands::Context, event: KeyEvent) {
match (event, cxt.editor.count) {
// count handling
(key!(i @ '0'), Some(_)) | (key!(i @ '1'..='9'), _) => {
let i = i.to_digit(10).unwrap() as usize;
cxt.editor.count =
std::num::NonZeroUsize::new(cxt.editor.count.map_or(i, |c| c.get() * 10 + i));
}
// special handling for repeat operator
(key!('.'), _) if self.keymaps.pending().is_empty() => {
for _ in 0..cxt.editor.count.map_or(1, NonZeroUsize::into) {
// first execute whatever put us into insert mode
self.last_insert.0.execute(cxt);
let mut last_savepoint = None;
let mut last_request_savepoint = None;
// then replay the inputs
for key in self.last_insert.1.clone() {
match key {
InsertEvent::Key(key) => self.insert_mode(cxt, key),
InsertEvent::CompletionApply(compl) => {
let (view, doc) = current!(cxt.editor);
if let Some(last_savepoint) = last_savepoint.as_deref() {
doc.restore(view, last_savepoint);
}
let text = doc.text().slice(..);
let cursor = doc.selection(view.id).primary().cursor(text);
let shift_position =
|pos: usize| -> usize { pos + cursor - compl.trigger_offset };
let tx = Transaction::change(
doc.text(),
compl.changes.iter().cloned().map(|(start, end, t)| {
(shift_position(start), shift_position(end), t)
}),
);
doc.apply(&tx, view.id);
}
InsertEvent::TriggerCompletion => {
last_savepoint = take(&mut last_request_savepoint);
}
InsertEvent::RequestCompletion => {
let (view, doc) = current!(cxt.editor);
last_request_savepoint = Some(doc.savepoint(view));
}
}
}
}
cxt.editor.count = None;
}
_ => {
// set the count
cxt.count = cxt.editor.count;
// TODO: edge case: 0j -> reset to 1
// if this fails, count was Some(0)
// debug_assert!(cxt.count != 0);
// set the register
cxt.register = cxt.editor.selected_register.take();
self.handle_keymap_event(mode, cxt, event);
if self.keymaps.pending().is_empty() {
cxt.editor.count = None
}
}
}
}
#[allow(clippy::too_many_arguments)]
pub fn set_completion(
&mut self,
editor: &mut Editor,
savepoint: Arc<SavePoint>,
items: Vec<helix_lsp::lsp::CompletionItem>,
offset_encoding: helix_lsp::OffsetEncoding,
start_offset: usize,
trigger_offset: usize,
size: Rect,
) -> Option<Rect> {
let mut completion = Completion::new(
editor,
savepoint,
items,
offset_encoding,
start_offset,
trigger_offset,
);
if completion.is_empty() {
// skip if we got no completion results
return None;
}
let area = completion.area(size, editor);
editor.last_completion = None;
self.last_insert.1.push(InsertEvent::TriggerCompletion);
// TODO : propagate required size on resize to completion too
completion.required_size((size.width, size.height));
self.completion = Some(completion);
Some(area)
}
pub fn clear_completion(&mut self, editor: &mut Editor) {
self.completion = None;
// Clear any savepoints
editor.clear_idle_timer(); // don't retrigger
}
pub fn handle_idle_timeout(&mut self, cx: &mut commands::Context) -> EventResult {
commands::compute_inlay_hints_for_all_views(cx.editor, cx.jobs);
if let Some(completion) = &mut self.completion {
return if completion.ensure_item_resolved(cx) {