1use crate::{Anchor, Autoscroll, Editor, Event, ExcerptId, NavigationData, ToOffset, ToPoint as _};
2use anyhow::{anyhow, Result};
3use gpui::{
4 elements::*, geometry::vector::vec2f, AppContext, Entity, ModelHandle, MutableAppContext,
5 RenderContext, Subscription, Task, View, ViewContext, ViewHandle,
6};
7use language::{Bias, Buffer, Diagnostic, File as _, SelectionGoal};
8use project::{File, Project, ProjectEntryId, ProjectPath};
9use rpc::proto::{self, update_view};
10use std::{fmt::Write, path::PathBuf};
11use text::{Point, Selection};
12use util::ResultExt;
13use workspace::{
14 FollowableItem, Item, ItemHandle, ItemNavHistory, ProjectItem, Settings, StatusItemView,
15};
16
17impl FollowableItem for Editor {
18 fn from_state_proto(
19 pane: ViewHandle<workspace::Pane>,
20 project: ModelHandle<Project>,
21 state: &mut Option<proto::view::Variant>,
22 cx: &mut MutableAppContext,
23 ) -> Option<Task<Result<ViewHandle<Self>>>> {
24 let state = if matches!(state, Some(proto::view::Variant::Editor(_))) {
25 if let Some(proto::view::Variant::Editor(state)) = state.take() {
26 state
27 } else {
28 unreachable!()
29 }
30 } else {
31 return None;
32 };
33
34 let buffer = project.update(cx, |project, cx| {
35 project.open_buffer_by_id(state.buffer_id, cx)
36 });
37 Some(cx.spawn(|mut cx| async move {
38 let buffer = buffer.await?;
39 let editor = pane
40 .read_with(&cx, |pane, cx| {
41 pane.items_of_type::<Self>().find(|editor| {
42 editor.read(cx).buffer.read(cx).as_singleton().as_ref() == Some(&buffer)
43 })
44 })
45 .unwrap_or_else(|| {
46 cx.add_view(pane.window_id(), |cx| {
47 Editor::for_buffer(buffer, Some(project), cx)
48 })
49 });
50 editor.update(&mut cx, |editor, cx| {
51 let excerpt_id;
52 let buffer_id;
53 {
54 let buffer = editor.buffer.read(cx).read(cx);
55 let singleton = buffer.as_singleton().unwrap();
56 excerpt_id = singleton.0.clone();
57 buffer_id = singleton.1;
58 }
59 let selections = state
60 .selections
61 .into_iter()
62 .map(|selection| {
63 deserialize_selection(&excerpt_id, buffer_id, selection)
64 .ok_or_else(|| anyhow!("invalid selection"))
65 })
66 .collect::<Result<Vec<_>>>()?;
67 if !selections.is_empty() {
68 editor.set_selections_from_remote(selections.into(), cx);
69 }
70
71 if let Some(anchor) = state.scroll_top_anchor {
72 editor.set_scroll_top_anchor(
73 Anchor {
74 buffer_id: Some(state.buffer_id as usize),
75 excerpt_id: excerpt_id.clone(),
76 text_anchor: language::proto::deserialize_anchor(anchor)
77 .ok_or_else(|| anyhow!("invalid scroll top"))?,
78 },
79 vec2f(state.scroll_x, state.scroll_y),
80 cx,
81 );
82 }
83
84 Ok::<_, anyhow::Error>(())
85 })?;
86 Ok(editor)
87 }))
88 }
89
90 fn set_leader_replica_id(
91 &mut self,
92 leader_replica_id: Option<u16>,
93 cx: &mut ViewContext<Self>,
94 ) {
95 self.leader_replica_id = leader_replica_id;
96 if self.leader_replica_id.is_some() {
97 self.buffer.update(cx, |buffer, cx| {
98 buffer.remove_active_selections(cx);
99 });
100 } else {
101 self.buffer.update(cx, |buffer, cx| {
102 if self.focused {
103 buffer.set_active_selections(&self.selections, cx);
104 }
105 });
106 }
107 cx.notify();
108 }
109
110 fn to_state_proto(&self, cx: &AppContext) -> Option<proto::view::Variant> {
111 let buffer_id = self.buffer.read(cx).as_singleton()?.read(cx).remote_id();
112 Some(proto::view::Variant::Editor(proto::view::Editor {
113 buffer_id,
114 scroll_top_anchor: Some(language::proto::serialize_anchor(
115 &self.scroll_top_anchor.text_anchor,
116 )),
117 scroll_x: self.scroll_position.x(),
118 scroll_y: self.scroll_position.y(),
119 selections: self.selections.iter().map(serialize_selection).collect(),
120 }))
121 }
122
123 fn add_event_to_update_proto(
124 &self,
125 event: &Self::Event,
126 update: &mut Option<proto::update_view::Variant>,
127 _: &AppContext,
128 ) -> bool {
129 let update =
130 update.get_or_insert_with(|| proto::update_view::Variant::Editor(Default::default()));
131
132 match update {
133 proto::update_view::Variant::Editor(update) => match event {
134 Event::ScrollPositionChanged { .. } => {
135 update.scroll_top_anchor = Some(language::proto::serialize_anchor(
136 &self.scroll_top_anchor.text_anchor,
137 ));
138 update.scroll_x = self.scroll_position.x();
139 update.scroll_y = self.scroll_position.y();
140 true
141 }
142 Event::SelectionsChanged { .. } => {
143 update.selections = self
144 .selections
145 .iter()
146 .chain(self.pending_selection.as_ref().map(|p| &p.selection))
147 .map(serialize_selection)
148 .collect();
149 true
150 }
151 _ => false,
152 },
153 }
154 }
155
156 fn apply_update_proto(
157 &mut self,
158 message: update_view::Variant,
159 cx: &mut ViewContext<Self>,
160 ) -> Result<()> {
161 match message {
162 update_view::Variant::Editor(message) => {
163 let buffer = self.buffer.read(cx);
164 let buffer = buffer.read(cx);
165 let (excerpt_id, buffer_id, _) = buffer.as_singleton().unwrap();
166 let excerpt_id = excerpt_id.clone();
167 drop(buffer);
168
169 let selections = message
170 .selections
171 .into_iter()
172 .filter_map(|selection| {
173 deserialize_selection(&excerpt_id, buffer_id, selection)
174 })
175 .collect::<Vec<_>>();
176
177 if !selections.is_empty() {
178 self.set_selections_from_remote(selections, cx);
179 self.request_autoscroll_remotely(Autoscroll::Newest, cx);
180 } else {
181 if let Some(anchor) = message.scroll_top_anchor {
182 self.set_scroll_top_anchor(
183 Anchor {
184 buffer_id: Some(buffer_id),
185 excerpt_id: excerpt_id.clone(),
186 text_anchor: language::proto::deserialize_anchor(anchor)
187 .ok_or_else(|| anyhow!("invalid scroll top"))?,
188 },
189 vec2f(message.scroll_x, message.scroll_y),
190 cx,
191 );
192 }
193 }
194 }
195 }
196 Ok(())
197 }
198
199 fn should_unfollow_on_event(event: &Self::Event, _: &AppContext) -> bool {
200 match event {
201 Event::Edited { local } => *local,
202 Event::SelectionsChanged { local } => *local,
203 Event::ScrollPositionChanged { local } => *local,
204 _ => false,
205 }
206 }
207}
208
209fn serialize_selection(selection: &Selection<Anchor>) -> proto::Selection {
210 proto::Selection {
211 id: selection.id as u64,
212 start: Some(language::proto::serialize_anchor(
213 &selection.start.text_anchor,
214 )),
215 end: Some(language::proto::serialize_anchor(
216 &selection.end.text_anchor,
217 )),
218 reversed: selection.reversed,
219 }
220}
221
222fn deserialize_selection(
223 excerpt_id: &ExcerptId,
224 buffer_id: usize,
225 selection: proto::Selection,
226) -> Option<Selection<Anchor>> {
227 Some(Selection {
228 id: selection.id as usize,
229 start: Anchor {
230 buffer_id: Some(buffer_id),
231 excerpt_id: excerpt_id.clone(),
232 text_anchor: language::proto::deserialize_anchor(selection.start?)?,
233 },
234 end: Anchor {
235 buffer_id: Some(buffer_id),
236 excerpt_id: excerpt_id.clone(),
237 text_anchor: language::proto::deserialize_anchor(selection.end?)?,
238 },
239 reversed: selection.reversed,
240 goal: SelectionGoal::None,
241 })
242}
243
244impl Item for Editor {
245 fn navigate(&mut self, data: Box<dyn std::any::Any>, cx: &mut ViewContext<Self>) {
246 if let Some(data) = data.downcast_ref::<NavigationData>() {
247 let buffer = self.buffer.read(cx).read(cx);
248 let offset = if buffer.can_resolve(&data.anchor) {
249 data.anchor.to_offset(&buffer)
250 } else {
251 buffer.clip_offset(data.offset, Bias::Left)
252 };
253
254 drop(buffer);
255 let nav_history = self.nav_history.take();
256 self.select_ranges([offset..offset], Some(Autoscroll::Fit), cx);
257 self.nav_history = nav_history;
258 }
259 }
260
261 fn tab_content(&self, style: &theme::Tab, cx: &AppContext) -> ElementBox {
262 let title = self.title(cx);
263 Label::new(title, style.label.clone()).boxed()
264 }
265
266 fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
267 File::from_dyn(self.buffer().read(cx).file(cx)).map(|file| ProjectPath {
268 worktree_id: file.worktree_id(cx),
269 path: file.path().clone(),
270 })
271 }
272
273 fn project_entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
274 File::from_dyn(self.buffer().read(cx).file(cx)).and_then(|file| file.project_entry_id(cx))
275 }
276
277 fn clone_on_split(&self, cx: &mut ViewContext<Self>) -> Option<Self>
278 where
279 Self: Sized,
280 {
281 Some(self.clone(cx))
282 }
283
284 fn set_nav_history(&mut self, history: ItemNavHistory, _: &mut ViewContext<Self>) {
285 self.nav_history = Some(history);
286 }
287
288 fn deactivated(&mut self, cx: &mut ViewContext<Self>) {
289 let selection = self.newest_anchor_selection();
290 self.push_to_nav_history(selection.head(), None, cx);
291 }
292
293 fn is_dirty(&self, cx: &AppContext) -> bool {
294 self.buffer().read(cx).read(cx).is_dirty()
295 }
296
297 fn has_conflict(&self, cx: &AppContext) -> bool {
298 self.buffer().read(cx).read(cx).has_conflict()
299 }
300
301 fn can_save(&self, cx: &AppContext) -> bool {
302 !self.buffer().read(cx).is_singleton() || self.project_path(cx).is_some()
303 }
304
305 fn save(
306 &mut self,
307 project: ModelHandle<Project>,
308 cx: &mut ViewContext<Self>,
309 ) -> Task<Result<()>> {
310 let buffer = self.buffer().clone();
311 let buffers = buffer.read(cx).all_buffers();
312 let transaction = project.update(cx, |project, cx| project.format(buffers, true, cx));
313 cx.spawn(|this, mut cx| async move {
314 let transaction = transaction.await.log_err();
315 this.update(&mut cx, |editor, cx| {
316 editor.request_autoscroll(Autoscroll::Fit, cx)
317 });
318 buffer
319 .update(&mut cx, |buffer, cx| {
320 if let Some(transaction) = transaction {
321 if !buffer.is_singleton() {
322 buffer.push_transaction(&transaction.0);
323 }
324 }
325
326 buffer.save(cx)
327 })
328 .await?;
329 Ok(())
330 })
331 }
332
333 fn can_save_as(&self, cx: &AppContext) -> bool {
334 self.buffer().read(cx).is_singleton()
335 }
336
337 fn save_as(
338 &mut self,
339 project: ModelHandle<Project>,
340 abs_path: PathBuf,
341 cx: &mut ViewContext<Self>,
342 ) -> Task<Result<()>> {
343 let buffer = self
344 .buffer()
345 .read(cx)
346 .as_singleton()
347 .expect("cannot call save_as on an excerpt list")
348 .clone();
349
350 project.update(cx, |project, cx| {
351 project.save_buffer_as(buffer, abs_path, cx)
352 })
353 }
354
355 fn should_activate_item_on_event(event: &Event) -> bool {
356 matches!(event, Event::Activate)
357 }
358
359 fn should_close_item_on_event(event: &Event) -> bool {
360 matches!(event, Event::Closed)
361 }
362
363 fn should_update_tab_on_event(event: &Event) -> bool {
364 matches!(event, Event::Saved | Event::Dirtied | Event::TitleChanged)
365 }
366}
367
368impl ProjectItem for Editor {
369 type Item = Buffer;
370
371 fn for_project_item(
372 project: ModelHandle<Project>,
373 buffer: ModelHandle<Buffer>,
374 cx: &mut ViewContext<Self>,
375 ) -> Self {
376 Self::for_buffer(buffer, Some(project), cx)
377 }
378}
379
380pub struct CursorPosition {
381 position: Option<Point>,
382 selected_count: usize,
383 _observe_active_editor: Option<Subscription>,
384}
385
386impl CursorPosition {
387 pub fn new() -> Self {
388 Self {
389 position: None,
390 selected_count: 0,
391 _observe_active_editor: None,
392 }
393 }
394
395 fn update_position(&mut self, editor: ViewHandle<Editor>, cx: &mut ViewContext<Self>) {
396 let editor = editor.read(cx);
397 let buffer = editor.buffer().read(cx).snapshot(cx);
398
399 self.selected_count = 0;
400 let mut last_selection: Option<Selection<usize>> = None;
401 for selection in editor.local_selections::<usize>(cx) {
402 self.selected_count += selection.end - selection.start;
403 if last_selection
404 .as_ref()
405 .map_or(true, |last_selection| selection.id > last_selection.id)
406 {
407 last_selection = Some(selection);
408 }
409 }
410 self.position = last_selection.map(|s| s.head().to_point(&buffer));
411
412 cx.notify();
413 }
414}
415
416impl Entity for CursorPosition {
417 type Event = ();
418}
419
420impl View for CursorPosition {
421 fn ui_name() -> &'static str {
422 "CursorPosition"
423 }
424
425 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
426 if let Some(position) = self.position {
427 let theme = &cx.global::<Settings>().theme.workspace.status_bar;
428 let mut text = format!("{},{}", position.row + 1, position.column + 1);
429 if self.selected_count > 0 {
430 write!(text, " ({} selected)", self.selected_count).unwrap();
431 }
432 Label::new(text, theme.cursor_position.clone()).boxed()
433 } else {
434 Empty::new().boxed()
435 }
436 }
437}
438
439impl StatusItemView for CursorPosition {
440 fn set_active_pane_item(
441 &mut self,
442 active_pane_item: Option<&dyn ItemHandle>,
443 cx: &mut ViewContext<Self>,
444 ) {
445 if let Some(editor) = active_pane_item.and_then(|item| item.downcast::<Editor>()) {
446 self._observe_active_editor = Some(cx.observe(&editor, Self::update_position));
447 self.update_position(editor, cx);
448 } else {
449 self.position = None;
450 self._observe_active_editor = None;
451 }
452
453 cx.notify();
454 }
455}
456
457pub struct DiagnosticMessage {
458 diagnostic: Option<Diagnostic>,
459 _observe_active_editor: Option<Subscription>,
460}
461
462impl DiagnosticMessage {
463 pub fn new() -> Self {
464 Self {
465 diagnostic: None,
466 _observe_active_editor: None,
467 }
468 }
469
470 fn update(&mut self, editor: ViewHandle<Editor>, cx: &mut ViewContext<Self>) {
471 let editor = editor.read(cx);
472 let buffer = editor.buffer().read(cx);
473 let cursor_position = editor
474 .newest_selection_with_snapshot::<usize>(&buffer.read(cx))
475 .head();
476 let new_diagnostic = buffer
477 .read(cx)
478 .diagnostics_in_range::<_, usize>(cursor_position..cursor_position, false)
479 .filter(|entry| !entry.range.is_empty())
480 .min_by_key(|entry| (entry.diagnostic.severity, entry.range.len()))
481 .map(|entry| entry.diagnostic);
482 if new_diagnostic != self.diagnostic {
483 self.diagnostic = new_diagnostic;
484 cx.notify();
485 }
486 }
487}
488
489impl Entity for DiagnosticMessage {
490 type Event = ();
491}
492
493impl View for DiagnosticMessage {
494 fn ui_name() -> &'static str {
495 "DiagnosticMessage"
496 }
497
498 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
499 if let Some(diagnostic) = &self.diagnostic {
500 let theme = &cx.global::<Settings>().theme.workspace.status_bar;
501 Label::new(
502 diagnostic.message.split('\n').next().unwrap().to_string(),
503 theme.diagnostic_message.clone(),
504 )
505 .boxed()
506 } else {
507 Empty::new().boxed()
508 }
509 }
510}
511
512impl StatusItemView for DiagnosticMessage {
513 fn set_active_pane_item(
514 &mut self,
515 active_pane_item: Option<&dyn ItemHandle>,
516 cx: &mut ViewContext<Self>,
517 ) {
518 if let Some(editor) = active_pane_item.and_then(|item| item.downcast::<Editor>()) {
519 self._observe_active_editor = Some(cx.observe(&editor, Self::update));
520 self.update(editor, cx);
521 } else {
522 self.diagnostic = Default::default();
523 self._observe_active_editor = None;
524 }
525 cx.notify();
526 }
527}