1#[cfg(test)]
2mod test;
3
4mod editor_events;
5mod insert;
6mod mode_indicator;
7mod motion;
8mod normal;
9mod object;
10mod state;
11mod utils;
12mod visual;
13
14use anyhow::Result;
15use collections::{CommandPaletteFilter, HashMap};
16use editor::{movement, Editor, EditorMode, Event};
17use gpui::{
18 actions, impl_actions, keymap_matcher::KeymapContext, keymap_matcher::MatchResult, AppContext,
19 Subscription, ViewContext, ViewHandle, WeakViewHandle, WindowContext,
20};
21use language::{CursorShape, Selection, SelectionGoal};
22pub use mode_indicator::ModeIndicator;
23use motion::Motion;
24use normal::normal_replace;
25use serde::Deserialize;
26use settings::{Setting, SettingsStore};
27use state::{EditorState, Mode, Operator, WorkspaceState};
28use std::{ops::Range, sync::Arc};
29use visual::{visual_block_motion, visual_replace};
30use workspace::{self, Workspace};
31
32use crate::state::ReplayableAction;
33
34struct VimModeSetting(bool);
35
36#[derive(Clone, Deserialize, PartialEq)]
37pub struct SwitchMode(pub Mode);
38
39#[derive(Clone, Deserialize, PartialEq)]
40pub struct PushOperator(pub Operator);
41
42#[derive(Clone, Deserialize, PartialEq)]
43struct Number(u8);
44
45actions!(vim, [Tab, Enter]);
46impl_actions!(vim, [Number, SwitchMode, PushOperator]);
47
48#[derive(Copy, Clone, Debug)]
49enum VimEvent {
50 ModeChanged { mode: Mode },
51}
52
53pub fn init(cx: &mut AppContext) {
54 settings::register::<VimModeSetting>(cx);
55
56 editor_events::init(cx);
57 normal::init(cx);
58 visual::init(cx);
59 insert::init(cx);
60 object::init(cx);
61 motion::init(cx);
62
63 // Vim Actions
64 cx.add_action(|_: &mut Workspace, &SwitchMode(mode): &SwitchMode, cx| {
65 Vim::update(cx, |vim, cx| vim.switch_mode(mode, false, cx))
66 });
67 cx.add_action(
68 |_: &mut Workspace, &PushOperator(operator): &PushOperator, cx| {
69 Vim::update(cx, |vim, cx| vim.push_operator(operator, cx))
70 },
71 );
72 cx.add_action(|_: &mut Workspace, n: &Number, cx: _| {
73 Vim::update(cx, |vim, cx| vim.push_number(n, cx));
74 });
75
76 cx.add_action(|_: &mut Workspace, _: &Tab, cx| {
77 Vim::active_editor_input_ignored(" ".into(), cx)
78 });
79
80 cx.add_action(|_: &mut Workspace, _: &Enter, cx| {
81 Vim::active_editor_input_ignored("\n".into(), cx)
82 });
83
84 // Any time settings change, update vim mode to match. The Vim struct
85 // will be initialized as disabled by default, so we filter its commands
86 // out when starting up.
87 cx.update_default_global::<CommandPaletteFilter, _, _>(|filter, _| {
88 filter.filtered_namespaces.insert("vim");
89 });
90 cx.update_default_global(|vim: &mut Vim, cx: &mut AppContext| {
91 vim.set_enabled(settings::get::<VimModeSetting>(cx).0, cx)
92 });
93 cx.observe_global::<SettingsStore, _>(|cx| {
94 cx.update_default_global(|vim: &mut Vim, cx: &mut AppContext| {
95 vim.set_enabled(settings::get::<VimModeSetting>(cx).0, cx)
96 });
97 })
98 .detach();
99}
100
101pub fn observe_keystrokes(cx: &mut WindowContext) {
102 cx.observe_keystrokes(|_keystroke, result, handled_by, cx| {
103 if result == &MatchResult::Pending {
104 return true;
105 }
106 if let Some(handled_by) = handled_by {
107 Vim::update(cx, |vim, _| {
108 if vim.workspace_state.recording {
109 vim.workspace_state
110 .repeat_actions
111 .push(ReplayableAction::Action(handled_by.boxed_clone()));
112
113 if vim.workspace_state.stop_recording_after_next_action {
114 vim.workspace_state.recording = false;
115 vim.workspace_state.stop_recording_after_next_action = false;
116 }
117 }
118 });
119
120 // Keystroke is handled by the vim system, so continue forward
121 if handled_by.namespace() == "vim" {
122 return true;
123 }
124 }
125
126 Vim::update(cx, |vim, cx| match vim.active_operator() {
127 Some(
128 Operator::FindForward { .. } | Operator::FindBackward { .. } | Operator::Replace,
129 ) => {}
130 Some(_) => {
131 vim.clear_operator(cx);
132 }
133 _ => {}
134 });
135 true
136 })
137 .detach()
138}
139
140#[derive(Default)]
141pub struct Vim {
142 active_editor: Option<WeakViewHandle<Editor>>,
143 editor_subscription: Option<Subscription>,
144 enabled: bool,
145 editor_states: HashMap<usize, EditorState>,
146 workspace_state: WorkspaceState,
147 default_state: EditorState,
148}
149
150impl Vim {
151 fn read(cx: &mut AppContext) -> &Self {
152 cx.default_global()
153 }
154
155 fn update<F, S>(cx: &mut WindowContext, update: F) -> S
156 where
157 F: FnOnce(&mut Self, &mut WindowContext) -> S,
158 {
159 cx.update_default_global(update)
160 }
161
162 fn set_active_editor(&mut self, editor: ViewHandle<Editor>, cx: &mut WindowContext) {
163 self.active_editor = Some(editor.clone().downgrade());
164 self.editor_subscription = Some(cx.subscribe(&editor, |editor, event, cx| match event {
165 Event::SelectionsChanged { local: true } => {
166 let editor = editor.read(cx);
167 if editor.leader_replica_id().is_none() {
168 let newest = editor.selections.newest::<usize>(cx);
169 local_selections_changed(newest, cx);
170 }
171 }
172 Event::InputIgnored { text } => {
173 Vim::active_editor_input_ignored(text.clone(), cx);
174 Vim::record_insertion(text, None, cx)
175 }
176 Event::InputHandled {
177 text,
178 utf16_range_to_replace: range_to_replace,
179 } => Vim::record_insertion(text, range_to_replace.clone(), cx),
180 _ => {}
181 }));
182
183 if self.enabled {
184 let editor = editor.read(cx);
185 let editor_mode = editor.mode();
186 let newest_selection_empty = editor.selections.newest::<usize>(cx).is_empty();
187
188 if editor_mode == EditorMode::Full
189 && !newest_selection_empty
190 && self.state().mode == Mode::Normal
191 {
192 self.switch_mode(Mode::Visual, true, cx);
193 }
194 }
195
196 self.sync_vim_settings(cx);
197 }
198
199 fn record_insertion(
200 text: &Arc<str>,
201 range_to_replace: Option<Range<isize>>,
202 cx: &mut WindowContext,
203 ) {
204 Vim::update(cx, |vim, _| {
205 if vim.workspace_state.recording {
206 vim.workspace_state
207 .repeat_actions
208 .push(ReplayableAction::Insertion {
209 text: text.clone(),
210 utf16_range_to_replace: range_to_replace,
211 });
212 if vim.workspace_state.stop_recording_after_next_action {
213 vim.workspace_state.recording = false;
214 vim.workspace_state.stop_recording_after_next_action = false;
215 }
216 }
217 });
218 }
219
220 fn update_active_editor<S>(
221 &self,
222 cx: &mut WindowContext,
223 update: impl FnOnce(&mut Editor, &mut ViewContext<Editor>) -> S,
224 ) -> Option<S> {
225 let editor = self.active_editor.clone()?.upgrade(cx)?;
226 Some(editor.update(cx, update))
227 }
228 // ~, shift-j, x, shift-x, p
229 // shift-c, shift-d, shift-i, i, a, o, shift-o, s
230 // c, d
231 // r
232
233 // TODO: shift-j?
234 //
235 pub fn start_recording(&mut self) {
236 if !self.workspace_state.replaying {
237 self.workspace_state.recording = true;
238 self.workspace_state.repeat_actions = Default::default();
239 self.workspace_state.recorded_count =
240 if let Some(Operator::Number(number)) = self.active_operator() {
241 Some(number)
242 } else {
243 None
244 }
245 }
246 }
247
248 pub fn stop_recording(&mut self) {
249 if self.workspace_state.recording {
250 self.workspace_state.stop_recording_after_next_action = true;
251 }
252 }
253
254 pub fn record_current_action(&mut self) {
255 self.start_recording();
256 self.stop_recording();
257 }
258
259 fn switch_mode(&mut self, mode: Mode, leave_selections: bool, cx: &mut WindowContext) {
260 let state = self.state();
261 let last_mode = state.mode;
262 let prior_mode = state.last_mode;
263 self.update_state(|state| {
264 state.last_mode = last_mode;
265 state.mode = mode;
266 state.operator_stack.clear();
267 });
268
269 cx.emit_global(VimEvent::ModeChanged { mode });
270
271 // Sync editor settings like clip mode
272 self.sync_vim_settings(cx);
273
274 if leave_selections {
275 return;
276 }
277
278 // Adjust selections
279 self.update_active_editor(cx, |editor, cx| {
280 if last_mode != Mode::VisualBlock && last_mode.is_visual() && mode == Mode::VisualBlock
281 {
282 visual_block_motion(true, editor, cx, |_, point, goal| Some((point, goal)))
283 }
284
285 editor.change_selections(None, cx, |s| {
286 // we cheat with visual block mode and use multiple cursors.
287 // the cost of this cheat is we need to convert back to a single
288 // cursor whenever vim would.
289 if last_mode == Mode::VisualBlock
290 && (mode != Mode::VisualBlock && mode != Mode::Insert)
291 {
292 let tail = s.oldest_anchor().tail();
293 let head = s.newest_anchor().head();
294 s.select_anchor_ranges(vec![tail..head]);
295 } else if last_mode == Mode::Insert
296 && prior_mode == Mode::VisualBlock
297 && mode != Mode::VisualBlock
298 {
299 let pos = s.first_anchor().head();
300 s.select_anchor_ranges(vec![pos..pos])
301 }
302
303 s.move_with(|map, selection| {
304 if last_mode.is_visual() && !mode.is_visual() {
305 let mut point = selection.head();
306 if !selection.reversed && !selection.is_empty() {
307 point = movement::left(map, selection.head());
308 }
309 selection.collapse_to(point, selection.goal)
310 } else if !last_mode.is_visual() && mode.is_visual() {
311 if selection.is_empty() {
312 selection.end = movement::right(map, selection.start);
313 }
314 }
315 });
316 })
317 });
318 }
319
320 fn push_operator(&mut self, operator: Operator, cx: &mut WindowContext) {
321 if matches!(
322 operator,
323 Operator::Change | Operator::Delete | Operator::Replace
324 ) {
325 self.start_recording()
326 };
327 self.update_state(|state| state.operator_stack.push(operator));
328 self.sync_vim_settings(cx);
329 }
330
331 fn push_number(&mut self, Number(number): &Number, cx: &mut WindowContext) {
332 if let Some(Operator::Number(current_number)) = self.active_operator() {
333 self.pop_operator(cx);
334 self.push_operator(Operator::Number(current_number * 10 + *number as usize), cx);
335 } else {
336 self.push_operator(Operator::Number(*number as usize), cx);
337 }
338 }
339
340 fn maybe_pop_operator(&mut self) -> Option<Operator> {
341 self.update_state(|state| state.operator_stack.pop())
342 }
343
344 fn pop_operator(&mut self, cx: &mut WindowContext) -> Operator {
345 let popped_operator = self.update_state( |state| state.operator_stack.pop()
346 ) .expect("Operator popped when no operator was on the stack. This likely means there is an invalid keymap config");
347 self.sync_vim_settings(cx);
348 popped_operator
349 }
350
351 fn pop_number_operator(&mut self, cx: &mut WindowContext) -> Option<usize> {
352 if self.workspace_state.replaying {
353 if let Some(number) = self.workspace_state.recorded_count {
354 return Some(number);
355 }
356 }
357
358 if let Some(Operator::Number(number)) = self.active_operator() {
359 self.pop_operator(cx);
360 return Some(number);
361 }
362 None
363 }
364
365 fn clear_operator(&mut self, cx: &mut WindowContext) {
366 self.update_state(|state| state.operator_stack.clear());
367 self.sync_vim_settings(cx);
368 }
369
370 fn active_operator(&self) -> Option<Operator> {
371 self.state().operator_stack.last().copied()
372 }
373
374 fn active_editor_input_ignored(text: Arc<str>, cx: &mut WindowContext) {
375 if text.is_empty() {
376 return;
377 }
378
379 match Vim::read(cx).active_operator() {
380 Some(Operator::FindForward { before }) => {
381 let find = Motion::FindForward { before, text };
382 Vim::update(cx, |vim, _| {
383 vim.workspace_state.last_find = Some(find.clone())
384 });
385 motion::motion(find, cx)
386 }
387 Some(Operator::FindBackward { after }) => {
388 let find = Motion::FindBackward { after, text };
389 Vim::update(cx, |vim, _| {
390 vim.workspace_state.last_find = Some(find.clone())
391 });
392 motion::motion(find, cx)
393 }
394 Some(Operator::Replace) => match Vim::read(cx).state().mode {
395 Mode::Normal => normal_replace(text, cx),
396 Mode::Visual | Mode::VisualLine | Mode::VisualBlock => visual_replace(text, cx),
397 _ => Vim::update(cx, |vim, cx| vim.clear_operator(cx)),
398 },
399 _ => {}
400 }
401 }
402
403 fn set_enabled(&mut self, enabled: bool, cx: &mut AppContext) {
404 if self.enabled != enabled {
405 self.enabled = enabled;
406
407 cx.update_default_global::<CommandPaletteFilter, _, _>(|filter, _| {
408 if self.enabled {
409 filter.filtered_namespaces.remove("vim");
410 } else {
411 filter.filtered_namespaces.insert("vim");
412 }
413 });
414
415 cx.update_active_window(|cx| {
416 if self.enabled {
417 let active_editor = cx
418 .root_view()
419 .downcast_ref::<Workspace>()
420 .and_then(|workspace| workspace.read(cx).active_item(cx))
421 .and_then(|item| item.downcast::<Editor>());
422 if let Some(active_editor) = active_editor {
423 self.set_active_editor(active_editor, cx);
424 }
425 self.switch_mode(Mode::Normal, false, cx);
426 }
427 self.sync_vim_settings(cx);
428 });
429 }
430 }
431
432 pub fn state(&self) -> &EditorState {
433 if let Some(active_editor) = self.active_editor.as_ref() {
434 if let Some(state) = self.editor_states.get(&active_editor.id()) {
435 return state;
436 }
437 }
438
439 &self.default_state
440 }
441
442 pub fn update_state<T>(&mut self, func: impl FnOnce(&mut EditorState) -> T) -> T {
443 let mut state = self.state().clone();
444 let ret = func(&mut state);
445
446 if let Some(active_editor) = self.active_editor.as_ref() {
447 self.editor_states.insert(active_editor.id(), state);
448 }
449
450 ret
451 }
452
453 fn sync_vim_settings(&self, cx: &mut WindowContext) {
454 let state = self.state();
455 let cursor_shape = state.cursor_shape();
456
457 self.update_active_editor(cx, |editor, cx| {
458 if self.enabled && editor.mode() == EditorMode::Full {
459 editor.set_cursor_shape(cursor_shape, cx);
460 editor.set_clip_at_line_ends(state.clip_at_line_ends(), cx);
461 editor.set_collapse_matches(true);
462 editor.set_input_enabled(!state.vim_controlled());
463 editor.set_autoindent(state.should_autoindent());
464 editor.selections.line_mode = matches!(state.mode, Mode::VisualLine);
465 let context_layer = state.keymap_context_layer();
466 editor.set_keymap_context_layer::<Self>(context_layer, cx);
467 } else {
468 // Note: set_collapse_matches is not in unhook_vim_settings, as that method is called on blur,
469 // but we need collapse_matches to persist when the search bar is focused.
470 editor.set_collapse_matches(false);
471 self.unhook_vim_settings(editor, cx);
472 }
473 });
474 }
475
476 fn unhook_vim_settings(&self, editor: &mut Editor, cx: &mut ViewContext<Editor>) {
477 editor.set_cursor_shape(CursorShape::Bar, cx);
478 editor.set_clip_at_line_ends(false, cx);
479 editor.set_input_enabled(true);
480 editor.set_autoindent(true);
481 editor.selections.line_mode = false;
482
483 // we set the VimEnabled context on all editors so that we
484 // can distinguish between vim mode and non-vim mode in the BufferSearchBar.
485 // This is a bit of a hack, but currently the search crate does not depend on vim,
486 // and it seems nice to keep it that way.
487 if self.enabled {
488 let mut context = KeymapContext::default();
489 context.add_identifier("VimEnabled");
490 editor.set_keymap_context_layer::<Self>(context, cx)
491 } else {
492 editor.remove_keymap_context_layer::<Self>(cx);
493 }
494 }
495}
496
497impl Setting for VimModeSetting {
498 const KEY: Option<&'static str> = Some("vim_mode");
499
500 type FileContent = Option<bool>;
501
502 fn load(
503 default_value: &Self::FileContent,
504 user_values: &[&Self::FileContent],
505 _: &AppContext,
506 ) -> Result<Self> {
507 Ok(Self(user_values.iter().rev().find_map(|v| **v).unwrap_or(
508 default_value.ok_or_else(Self::missing_default)?,
509 )))
510 }
511}
512
513fn local_selections_changed(newest: Selection<usize>, cx: &mut WindowContext) {
514 Vim::update(cx, |vim, cx| {
515 if vim.enabled && vim.state().mode == Mode::Normal && !newest.is_empty() {
516 if matches!(newest.goal, SelectionGoal::ColumnRange { .. }) {
517 vim.switch_mode(Mode::VisualBlock, false, cx);
518 } else {
519 vim.switch_mode(Mode::Visual, false, cx)
520 }
521 }
522 })
523}