1use crate::{
2 display_map::ToDisplayPoint, link_go_to_definition::hide_link_definition,
3 movement::surrounding_word, Anchor, Autoscroll, Editor, EditorMode, Event, ExcerptId,
4 MultiBuffer, MultiBufferSnapshot, NavigationData, ToPoint as _, FORMAT_TIMEOUT,
5};
6use anyhow::{anyhow, Context, Result};
7use futures::FutureExt;
8use gpui::{
9 elements::*, geometry::vector::vec2f, AppContext, Entity, ModelHandle, MutableAppContext,
10 RenderContext, Subscription, Task, View, ViewContext, ViewHandle, WeakViewHandle,
11};
12use language::{Bias, Buffer, File as _, OffsetRangeExt, Point, SelectionGoal};
13use project::{File, FormatTrigger, Project, ProjectEntryId, ProjectPath};
14use rpc::proto::{self, update_view};
15use settings::Settings;
16use smallvec::SmallVec;
17use std::{
18 borrow::Cow,
19 cmp::{self, Ordering},
20 fmt::Write,
21 ops::Range,
22 path::{Path, PathBuf},
23};
24use text::Selection;
25use util::TryFutureExt;
26use workspace::{
27 item::{FollowableItem, Item, ItemEvent, ItemHandle, ProjectItem},
28 searchable::{Direction, SearchEvent, SearchableItem, SearchableItemHandle},
29 ItemId, ItemNavHistory, Pane, StatusItemView, ToolbarItemLocation, Workspace, WorkspaceId,
30};
31
32pub const MAX_TAB_TITLE_LEN: usize = 24;
33
34impl FollowableItem for Editor {
35 fn from_state_proto(
36 pane: ViewHandle<workspace::Pane>,
37 project: ModelHandle<Project>,
38 state: &mut Option<proto::view::Variant>,
39 cx: &mut MutableAppContext,
40 ) -> Option<Task<Result<ViewHandle<Self>>>> {
41 let state = if matches!(state, Some(proto::view::Variant::Editor(_))) {
42 if let Some(proto::view::Variant::Editor(state)) = state.take() {
43 state
44 } else {
45 unreachable!()
46 }
47 } else {
48 return None;
49 };
50
51 let buffer = project.update(cx, |project, cx| {
52 project.open_buffer_by_id(state.buffer_id, cx)
53 });
54 Some(cx.spawn(|mut cx| async move {
55 let buffer = buffer.await?;
56 let editor = pane
57 .read_with(&cx, |pane, cx| {
58 pane.items_of_type::<Self>().find(|editor| {
59 editor.read(cx).buffer.read(cx).as_singleton().as_ref() == Some(&buffer)
60 })
61 })
62 .unwrap_or_else(|| {
63 pane.update(&mut cx, |_, cx| {
64 cx.add_view(|cx| Editor::for_buffer(buffer, Some(project), cx))
65 })
66 });
67 editor.update(&mut cx, |editor, cx| {
68 let excerpt_id;
69 let buffer_id;
70 {
71 let buffer = editor.buffer.read(cx).read(cx);
72 let singleton = buffer.as_singleton().unwrap();
73 excerpt_id = singleton.0.clone();
74 buffer_id = singleton.1;
75 }
76 let selections = state
77 .selections
78 .into_iter()
79 .map(|selection| {
80 deserialize_selection(&excerpt_id, buffer_id, selection)
81 .ok_or_else(|| anyhow!("invalid selection"))
82 })
83 .collect::<Result<Vec<_>>>()?;
84 if !selections.is_empty() {
85 editor.set_selections_from_remote(selections, cx);
86 }
87
88 if let Some(anchor) = state.scroll_top_anchor {
89 editor.set_scroll_top_anchor(
90 Anchor {
91 buffer_id: Some(state.buffer_id as usize),
92 excerpt_id,
93 text_anchor: language::proto::deserialize_anchor(anchor)
94 .ok_or_else(|| anyhow!("invalid scroll top"))?,
95 },
96 vec2f(state.scroll_x, state.scroll_y),
97 cx,
98 );
99 }
100
101 Ok::<_, anyhow::Error>(())
102 })?;
103 Ok(editor)
104 }))
105 }
106
107 fn set_leader_replica_id(
108 &mut self,
109 leader_replica_id: Option<u16>,
110 cx: &mut ViewContext<Self>,
111 ) {
112 self.leader_replica_id = leader_replica_id;
113 if self.leader_replica_id.is_some() {
114 self.buffer.update(cx, |buffer, cx| {
115 buffer.remove_active_selections(cx);
116 });
117 } else {
118 self.buffer.update(cx, |buffer, cx| {
119 if self.focused {
120 buffer.set_active_selections(
121 &self.selections.disjoint_anchors(),
122 self.selections.line_mode,
123 self.cursor_shape,
124 cx,
125 );
126 }
127 });
128 }
129 cx.notify();
130 }
131
132 fn to_state_proto(&self, cx: &AppContext) -> Option<proto::view::Variant> {
133 let buffer_id = self.buffer.read(cx).as_singleton()?.read(cx).remote_id();
134 Some(proto::view::Variant::Editor(proto::view::Editor {
135 buffer_id,
136 scroll_top_anchor: Some(language::proto::serialize_anchor(
137 &self.scroll_top_anchor.text_anchor,
138 )),
139 scroll_x: self.scroll_position.x(),
140 scroll_y: self.scroll_position.y(),
141 selections: self
142 .selections
143 .disjoint_anchors()
144 .iter()
145 .map(serialize_selection)
146 .collect(),
147 }))
148 }
149
150 fn add_event_to_update_proto(
151 &self,
152 event: &Self::Event,
153 update: &mut Option<proto::update_view::Variant>,
154 _: &AppContext,
155 ) -> bool {
156 let update =
157 update.get_or_insert_with(|| proto::update_view::Variant::Editor(Default::default()));
158
159 match update {
160 proto::update_view::Variant::Editor(update) => match event {
161 Event::ScrollPositionChanged { .. } => {
162 update.scroll_top_anchor = Some(language::proto::serialize_anchor(
163 &self.scroll_top_anchor.text_anchor,
164 ));
165 update.scroll_x = self.scroll_position.x();
166 update.scroll_y = self.scroll_position.y();
167 true
168 }
169 Event::SelectionsChanged { .. } => {
170 update.selections = self
171 .selections
172 .disjoint_anchors()
173 .iter()
174 .chain(self.selections.pending_anchor().as_ref())
175 .map(serialize_selection)
176 .collect();
177 true
178 }
179 _ => false,
180 },
181 }
182 }
183
184 fn apply_update_proto(
185 &mut self,
186 message: update_view::Variant,
187 cx: &mut ViewContext<Self>,
188 ) -> Result<()> {
189 match message {
190 update_view::Variant::Editor(message) => {
191 let buffer = self.buffer.read(cx);
192 let buffer = buffer.read(cx);
193 let (excerpt_id, buffer_id, _) = buffer.as_singleton().unwrap();
194 let excerpt_id = excerpt_id.clone();
195 drop(buffer);
196
197 let selections = message
198 .selections
199 .into_iter()
200 .filter_map(|selection| {
201 deserialize_selection(&excerpt_id, buffer_id, selection)
202 })
203 .collect::<Vec<_>>();
204
205 if !selections.is_empty() {
206 self.set_selections_from_remote(selections, cx);
207 self.request_autoscroll_remotely(Autoscroll::newest(), cx);
208 } else if let Some(anchor) = message.scroll_top_anchor {
209 self.set_scroll_top_anchor(
210 Anchor {
211 buffer_id: Some(buffer_id),
212 excerpt_id,
213 text_anchor: language::proto::deserialize_anchor(anchor)
214 .ok_or_else(|| anyhow!("invalid scroll top"))?,
215 },
216 vec2f(message.scroll_x, message.scroll_y),
217 cx,
218 );
219 }
220 }
221 }
222 Ok(())
223 }
224
225 fn should_unfollow_on_event(event: &Self::Event, _: &AppContext) -> bool {
226 match event {
227 Event::Edited => true,
228 Event::SelectionsChanged { local } => *local,
229 Event::ScrollPositionChanged { local } => *local,
230 _ => false,
231 }
232 }
233}
234
235fn serialize_selection(selection: &Selection<Anchor>) -> proto::Selection {
236 proto::Selection {
237 id: selection.id as u64,
238 start: Some(language::proto::serialize_anchor(
239 &selection.start.text_anchor,
240 )),
241 end: Some(language::proto::serialize_anchor(
242 &selection.end.text_anchor,
243 )),
244 reversed: selection.reversed,
245 }
246}
247
248fn deserialize_selection(
249 excerpt_id: &ExcerptId,
250 buffer_id: usize,
251 selection: proto::Selection,
252) -> Option<Selection<Anchor>> {
253 Some(Selection {
254 id: selection.id as usize,
255 start: Anchor {
256 buffer_id: Some(buffer_id),
257 excerpt_id: excerpt_id.clone(),
258 text_anchor: language::proto::deserialize_anchor(selection.start?)?,
259 },
260 end: Anchor {
261 buffer_id: Some(buffer_id),
262 excerpt_id: excerpt_id.clone(),
263 text_anchor: language::proto::deserialize_anchor(selection.end?)?,
264 },
265 reversed: selection.reversed,
266 goal: SelectionGoal::None,
267 })
268}
269
270impl Item for Editor {
271 fn navigate(&mut self, data: Box<dyn std::any::Any>, cx: &mut ViewContext<Self>) -> bool {
272 if let Ok(data) = data.downcast::<NavigationData>() {
273 let newest_selection = self.selections.newest::<Point>(cx);
274 let buffer = self.buffer.read(cx).read(cx);
275 let offset = if buffer.can_resolve(&data.cursor_anchor) {
276 data.cursor_anchor.to_point(&buffer)
277 } else {
278 buffer.clip_point(data.cursor_position, Bias::Left)
279 };
280
281 let scroll_top_anchor = if buffer.can_resolve(&data.scroll_top_anchor) {
282 data.scroll_top_anchor
283 } else {
284 buffer.anchor_before(
285 buffer.clip_point(Point::new(data.scroll_top_row, 0), Bias::Left),
286 )
287 };
288
289 drop(buffer);
290
291 if newest_selection.head() == offset {
292 false
293 } else {
294 let nav_history = self.nav_history.take();
295 self.scroll_position = data.scroll_position;
296 self.scroll_top_anchor = scroll_top_anchor;
297 self.change_selections(Some(Autoscroll::fit()), cx, |s| {
298 s.select_ranges([offset..offset])
299 });
300 self.nav_history = nav_history;
301 true
302 }
303 } else {
304 false
305 }
306 }
307
308 fn tab_description<'a>(&'a self, detail: usize, cx: &'a AppContext) -> Option<Cow<'a, str>> {
309 match path_for_buffer(&self.buffer, detail, true, cx)? {
310 Cow::Borrowed(path) => Some(path.to_string_lossy()),
311 Cow::Owned(path) => Some(path.to_string_lossy().to_string().into()),
312 }
313 }
314
315 fn tab_content(
316 &self,
317 detail: Option<usize>,
318 style: &theme::Tab,
319 cx: &AppContext,
320 ) -> ElementBox {
321 Flex::row()
322 .with_child(
323 Label::new(self.title(cx).into(), style.label.clone())
324 .aligned()
325 .boxed(),
326 )
327 .with_children(detail.and_then(|detail| {
328 let path = path_for_buffer(&self.buffer, detail, false, cx)?;
329 let description = path.to_string_lossy();
330 Some(
331 Label::new(
332 if description.len() > MAX_TAB_TITLE_LEN {
333 description[..MAX_TAB_TITLE_LEN].to_string() + "…"
334 } else {
335 description.into()
336 },
337 style.description.text.clone(),
338 )
339 .contained()
340 .with_style(style.description.container)
341 .aligned()
342 .boxed(),
343 )
344 }))
345 .boxed()
346 }
347
348 fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
349 let buffer = self.buffer.read(cx).as_singleton()?;
350 let file = buffer.read(cx).file();
351 File::from_dyn(file).map(|file| ProjectPath {
352 worktree_id: file.worktree_id(cx),
353 path: file.path().clone(),
354 })
355 }
356
357 fn project_entry_ids(&self, cx: &AppContext) -> SmallVec<[ProjectEntryId; 3]> {
358 self.buffer
359 .read(cx)
360 .files(cx)
361 .into_iter()
362 .filter_map(|file| File::from_dyn(Some(file))?.project_entry_id(cx))
363 .collect()
364 }
365
366 fn is_singleton(&self, cx: &AppContext) -> bool {
367 self.buffer.read(cx).is_singleton()
368 }
369
370 fn clone_on_split(&self, cx: &mut ViewContext<Self>) -> Option<Self>
371 where
372 Self: Sized,
373 {
374 Some(self.clone(cx))
375 }
376
377 fn set_nav_history(&mut self, history: ItemNavHistory, _: &mut ViewContext<Self>) {
378 self.nav_history = Some(history);
379 }
380
381 fn deactivated(&mut self, cx: &mut ViewContext<Self>) {
382 let selection = self.selections.newest_anchor();
383 self.push_to_nav_history(selection.head(), None, cx);
384 }
385
386 fn workspace_deactivated(&mut self, cx: &mut ViewContext<Self>) {
387 hide_link_definition(self, cx);
388 self.link_go_to_definition_state.last_mouse_location = None;
389 }
390
391 fn is_dirty(&self, cx: &AppContext) -> bool {
392 self.buffer().read(cx).read(cx).is_dirty()
393 }
394
395 fn has_conflict(&self, cx: &AppContext) -> bool {
396 self.buffer().read(cx).read(cx).has_conflict()
397 }
398
399 fn can_save(&self, cx: &AppContext) -> bool {
400 !self.buffer().read(cx).is_singleton() || self.project_path(cx).is_some()
401 }
402
403 fn save(
404 &mut self,
405 project: ModelHandle<Project>,
406 cx: &mut ViewContext<Self>,
407 ) -> Task<Result<()>> {
408 self.report_event("save editor", cx);
409
410 let buffer = self.buffer().clone();
411 let buffers = buffer.read(cx).all_buffers();
412 let mut timeout = cx.background().timer(FORMAT_TIMEOUT).fuse();
413 let format = project.update(cx, |project, cx| {
414 project.format(buffers, true, FormatTrigger::Save, cx)
415 });
416 cx.spawn(|_, mut cx| async move {
417 let transaction = futures::select_biased! {
418 _ = timeout => {
419 log::warn!("timed out waiting for formatting");
420 None
421 }
422 transaction = format.log_err().fuse() => transaction,
423 };
424
425 buffer
426 .update(&mut cx, |buffer, cx| {
427 if let Some(transaction) = transaction {
428 if !buffer.is_singleton() {
429 buffer.push_transaction(&transaction.0);
430 }
431 }
432
433 buffer.save(cx)
434 })
435 .await?;
436 Ok(())
437 })
438 }
439
440 fn save_as(
441 &mut self,
442 project: ModelHandle<Project>,
443 abs_path: PathBuf,
444 cx: &mut ViewContext<Self>,
445 ) -> Task<Result<()>> {
446 let buffer = self
447 .buffer()
448 .read(cx)
449 .as_singleton()
450 .expect("cannot call save_as on an excerpt list");
451
452 project.update(cx, |project, cx| {
453 project.save_buffer_as(buffer, abs_path, cx)
454 })
455 }
456
457 fn reload(
458 &mut self,
459 project: ModelHandle<Project>,
460 cx: &mut ViewContext<Self>,
461 ) -> Task<Result<()>> {
462 let buffer = self.buffer().clone();
463 let buffers = self.buffer.read(cx).all_buffers();
464 let reload_buffers =
465 project.update(cx, |project, cx| project.reload_buffers(buffers, true, cx));
466 cx.spawn(|this, mut cx| async move {
467 let transaction = reload_buffers.log_err().await;
468 this.update(&mut cx, |editor, cx| {
469 editor.request_autoscroll(Autoscroll::fit(), cx)
470 });
471 buffer.update(&mut cx, |buffer, _| {
472 if let Some(transaction) = transaction {
473 if !buffer.is_singleton() {
474 buffer.push_transaction(&transaction.0);
475 }
476 }
477 });
478 Ok(())
479 })
480 }
481
482 fn git_diff_recalc(
483 &mut self,
484 _project: ModelHandle<Project>,
485 cx: &mut ViewContext<Self>,
486 ) -> Task<Result<()>> {
487 self.buffer().update(cx, |multibuffer, cx| {
488 multibuffer.git_diff_recalc(cx);
489 });
490 Task::ready(Ok(()))
491 }
492
493 fn to_item_events(event: &Self::Event) -> Vec<ItemEvent> {
494 let mut result = Vec::new();
495 match event {
496 Event::Closed => result.push(ItemEvent::CloseItem),
497 Event::Saved | Event::TitleChanged => {
498 result.push(ItemEvent::UpdateTab);
499 result.push(ItemEvent::UpdateBreadcrumbs);
500 }
501 Event::Reparsed => {
502 result.push(ItemEvent::UpdateBreadcrumbs);
503 }
504 Event::SelectionsChanged { local } if *local => {
505 result.push(ItemEvent::UpdateBreadcrumbs);
506 }
507 Event::DirtyChanged => {
508 result.push(ItemEvent::UpdateTab);
509 }
510 Event::BufferEdited => {
511 result.push(ItemEvent::Edit);
512 result.push(ItemEvent::UpdateBreadcrumbs);
513 }
514 _ => {}
515 }
516 result
517 }
518
519 fn as_searchable(&self, handle: &ViewHandle<Self>) -> Option<Box<dyn SearchableItemHandle>> {
520 Some(Box::new(handle.clone()))
521 }
522
523 fn breadcrumb_location(&self) -> ToolbarItemLocation {
524 ToolbarItemLocation::PrimaryLeft { flex: None }
525 }
526
527 fn breadcrumbs(&self, theme: &theme::Theme, cx: &AppContext) -> Option<Vec<ElementBox>> {
528 let cursor = self.selections.newest_anchor().head();
529 let multibuffer = &self.buffer().read(cx);
530 let (buffer_id, symbols) =
531 multibuffer.symbols_containing(cursor, Some(&theme.editor.syntax), cx)?;
532 let buffer = multibuffer.buffer(buffer_id)?;
533
534 let buffer = buffer.read(cx);
535 let filename = buffer
536 .snapshot()
537 .resolve_file_path(
538 cx,
539 self.project
540 .as_ref()
541 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
542 .unwrap_or_default(),
543 )
544 .map(|path| path.to_string_lossy().to_string())
545 .unwrap_or_else(|| "untitled".to_string());
546
547 let mut breadcrumbs = vec![Label::new(filename, theme.breadcrumbs.text.clone()).boxed()];
548 breadcrumbs.extend(symbols.into_iter().map(|symbol| {
549 Text::new(symbol.text, theme.breadcrumbs.text.clone())
550 .with_highlights(symbol.highlight_ranges)
551 .boxed()
552 }));
553 Some(breadcrumbs)
554 }
555
556 fn serialized_item_kind() -> Option<&'static str> {
557 // TODO: Some("Editor")
558 None
559 }
560
561 fn deserialize(
562 project: ModelHandle<Project>,
563 _workspace: WeakViewHandle<Workspace>,
564 _workspace_id: WorkspaceId,
565 _item_id: ItemId,
566 cx: &mut ViewContext<Pane>,
567 ) -> Task<Result<ViewHandle<Self>>> {
568 // Look up the path with this key associated, create a self with that path
569 let path = Path::new(".");
570 if let Some(project_item) = project.update(cx, |project, cx| {
571 let (worktree, path) = project.find_local_worktree(path, cx)?;
572 let project_path = ProjectPath {
573 worktree_id: worktree.read(cx).id(),
574 path: path.into(),
575 };
576
577 Some(project.open_path(project_path, cx))
578 }) {
579 cx.spawn(|pane, mut cx| async move {
580 let (_, project_item) = project_item.await?;
581 let buffer = project_item
582 .downcast::<Buffer>()
583 .context("Project item at stored path was not a buffer")?;
584
585 Ok(cx.update(|cx| {
586 cx.add_view(pane, |cx| Editor::for_buffer(buffer, Some(project), cx))
587 }))
588 })
589 } else {
590 Task::ready(Err(anyhow!("Could not load file from stored path")))
591 }
592 }
593}
594
595impl ProjectItem for Editor {
596 type Item = Buffer;
597
598 fn for_project_item(
599 project: ModelHandle<Project>,
600 buffer: ModelHandle<Buffer>,
601 cx: &mut ViewContext<Self>,
602 ) -> Self {
603 Self::for_buffer(buffer, Some(project), cx)
604 }
605}
606
607enum BufferSearchHighlights {}
608impl SearchableItem for Editor {
609 type Match = Range<Anchor>;
610
611 fn to_search_event(event: &Self::Event) -> Option<SearchEvent> {
612 match event {
613 Event::BufferEdited => Some(SearchEvent::MatchesInvalidated),
614 Event::SelectionsChanged { .. } => Some(SearchEvent::ActiveMatchChanged),
615 _ => None,
616 }
617 }
618
619 fn clear_matches(&mut self, cx: &mut ViewContext<Self>) {
620 self.clear_background_highlights::<BufferSearchHighlights>(cx);
621 }
622
623 fn update_matches(&mut self, matches: Vec<Range<Anchor>>, cx: &mut ViewContext<Self>) {
624 self.highlight_background::<BufferSearchHighlights>(
625 matches,
626 |theme| theme.search.match_background,
627 cx,
628 );
629 }
630
631 fn query_suggestion(&mut self, cx: &mut ViewContext<Self>) -> String {
632 let display_map = self.snapshot(cx).display_snapshot;
633 let selection = self.selections.newest::<usize>(cx);
634 if selection.start == selection.end {
635 let point = selection.start.to_display_point(&display_map);
636 let range = surrounding_word(&display_map, point);
637 let range = range.start.to_offset(&display_map, Bias::Left)
638 ..range.end.to_offset(&display_map, Bias::Right);
639 let text: String = display_map.buffer_snapshot.text_for_range(range).collect();
640 if text.trim().is_empty() {
641 String::new()
642 } else {
643 text
644 }
645 } else {
646 display_map
647 .buffer_snapshot
648 .text_for_range(selection.start..selection.end)
649 .collect()
650 }
651 }
652
653 fn activate_match(
654 &mut self,
655 index: usize,
656 matches: Vec<Range<Anchor>>,
657 cx: &mut ViewContext<Self>,
658 ) {
659 self.unfold_ranges([matches[index].clone()], false, cx);
660 self.change_selections(Some(Autoscroll::fit()), cx, |s| {
661 s.select_ranges([matches[index].clone()])
662 });
663 }
664
665 fn match_index_for_direction(
666 &mut self,
667 matches: &Vec<Range<Anchor>>,
668 mut current_index: usize,
669 direction: Direction,
670 cx: &mut ViewContext<Self>,
671 ) -> usize {
672 let buffer = self.buffer().read(cx).snapshot(cx);
673 let cursor = self.selections.newest_anchor().head();
674 if matches[current_index].start.cmp(&cursor, &buffer).is_gt() {
675 if direction == Direction::Prev {
676 if current_index == 0 {
677 current_index = matches.len() - 1;
678 } else {
679 current_index -= 1;
680 }
681 }
682 } else if matches[current_index].end.cmp(&cursor, &buffer).is_lt() {
683 if direction == Direction::Next {
684 current_index = 0;
685 }
686 } else if direction == Direction::Prev {
687 if current_index == 0 {
688 current_index = matches.len() - 1;
689 } else {
690 current_index -= 1;
691 }
692 } else if direction == Direction::Next {
693 if current_index == matches.len() - 1 {
694 current_index = 0
695 } else {
696 current_index += 1;
697 }
698 };
699 current_index
700 }
701
702 fn find_matches(
703 &mut self,
704 query: project::search::SearchQuery,
705 cx: &mut ViewContext<Self>,
706 ) -> Task<Vec<Range<Anchor>>> {
707 let buffer = self.buffer().read(cx).snapshot(cx);
708 cx.background().spawn(async move {
709 let mut ranges = Vec::new();
710 if let Some((_, _, excerpt_buffer)) = buffer.as_singleton() {
711 ranges.extend(
712 query
713 .search(excerpt_buffer.as_rope())
714 .await
715 .into_iter()
716 .map(|range| {
717 buffer.anchor_after(range.start)..buffer.anchor_before(range.end)
718 }),
719 );
720 } else {
721 for excerpt in buffer.excerpt_boundaries_in_range(0..buffer.len()) {
722 let excerpt_range = excerpt.range.context.to_offset(&excerpt.buffer);
723 let rope = excerpt.buffer.as_rope().slice(excerpt_range.clone());
724 ranges.extend(query.search(&rope).await.into_iter().map(|range| {
725 let start = excerpt
726 .buffer
727 .anchor_after(excerpt_range.start + range.start);
728 let end = excerpt
729 .buffer
730 .anchor_before(excerpt_range.start + range.end);
731 buffer.anchor_in_excerpt(excerpt.id.clone(), start)
732 ..buffer.anchor_in_excerpt(excerpt.id.clone(), end)
733 }));
734 }
735 }
736 ranges
737 })
738 }
739
740 fn active_match_index(
741 &mut self,
742 matches: Vec<Range<Anchor>>,
743 cx: &mut ViewContext<Self>,
744 ) -> Option<usize> {
745 active_match_index(
746 &matches,
747 &self.selections.newest_anchor().head(),
748 &self.buffer().read(cx).snapshot(cx),
749 )
750 }
751}
752
753pub fn active_match_index(
754 ranges: &[Range<Anchor>],
755 cursor: &Anchor,
756 buffer: &MultiBufferSnapshot,
757) -> Option<usize> {
758 if ranges.is_empty() {
759 None
760 } else {
761 match ranges.binary_search_by(|probe| {
762 if probe.end.cmp(cursor, &*buffer).is_lt() {
763 Ordering::Less
764 } else if probe.start.cmp(cursor, &*buffer).is_gt() {
765 Ordering::Greater
766 } else {
767 Ordering::Equal
768 }
769 }) {
770 Ok(i) | Err(i) => Some(cmp::min(i, ranges.len() - 1)),
771 }
772 }
773}
774
775pub struct CursorPosition {
776 position: Option<Point>,
777 selected_count: usize,
778 _observe_active_editor: Option<Subscription>,
779}
780
781impl Default for CursorPosition {
782 fn default() -> Self {
783 Self::new()
784 }
785}
786
787impl CursorPosition {
788 pub fn new() -> Self {
789 Self {
790 position: None,
791 selected_count: 0,
792 _observe_active_editor: None,
793 }
794 }
795
796 fn update_position(&mut self, editor: ViewHandle<Editor>, cx: &mut ViewContext<Self>) {
797 let editor = editor.read(cx);
798 let buffer = editor.buffer().read(cx).snapshot(cx);
799
800 self.selected_count = 0;
801 let mut last_selection: Option<Selection<usize>> = None;
802 for selection in editor.selections.all::<usize>(cx) {
803 self.selected_count += selection.end - selection.start;
804 if last_selection
805 .as_ref()
806 .map_or(true, |last_selection| selection.id > last_selection.id)
807 {
808 last_selection = Some(selection);
809 }
810 }
811 self.position = last_selection.map(|s| s.head().to_point(&buffer));
812
813 cx.notify();
814 }
815}
816
817impl Entity for CursorPosition {
818 type Event = ();
819}
820
821impl View for CursorPosition {
822 fn ui_name() -> &'static str {
823 "CursorPosition"
824 }
825
826 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
827 if let Some(position) = self.position {
828 let theme = &cx.global::<Settings>().theme.workspace.status_bar;
829 let mut text = format!("{},{}", position.row + 1, position.column + 1);
830 if self.selected_count > 0 {
831 write!(text, " ({} selected)", self.selected_count).unwrap();
832 }
833 Label::new(text, theme.cursor_position.clone()).boxed()
834 } else {
835 Empty::new().boxed()
836 }
837 }
838}
839
840impl StatusItemView for CursorPosition {
841 fn set_active_pane_item(
842 &mut self,
843 active_pane_item: Option<&dyn ItemHandle>,
844 cx: &mut ViewContext<Self>,
845 ) {
846 if let Some(editor) = active_pane_item.and_then(|item| item.downcast::<Editor>()) {
847 self._observe_active_editor = Some(cx.observe(&editor, Self::update_position));
848 self.update_position(editor, cx);
849 } else {
850 self.position = None;
851 self._observe_active_editor = None;
852 }
853
854 cx.notify();
855 }
856}
857
858fn path_for_buffer<'a>(
859 buffer: &ModelHandle<MultiBuffer>,
860 height: usize,
861 include_filename: bool,
862 cx: &'a AppContext,
863) -> Option<Cow<'a, Path>> {
864 let file = buffer.read(cx).as_singleton()?.read(cx).file()?;
865 path_for_file(file, height, include_filename, cx)
866}
867
868fn path_for_file<'a>(
869 file: &'a dyn language::File,
870 mut height: usize,
871 include_filename: bool,
872 cx: &'a AppContext,
873) -> Option<Cow<'a, Path>> {
874 // Ensure we always render at least the filename.
875 height += 1;
876
877 let mut prefix = file.path().as_ref();
878 while height > 0 {
879 if let Some(parent) = prefix.parent() {
880 prefix = parent;
881 height -= 1;
882 } else {
883 break;
884 }
885 }
886
887 // Here we could have just always used `full_path`, but that is very
888 // allocation-heavy and so we try to use a `Cow<Path>` if we haven't
889 // traversed all the way up to the worktree's root.
890 if height > 0 {
891 let full_path = file.full_path(cx);
892 if include_filename {
893 Some(full_path.into())
894 } else {
895 Some(full_path.parent()?.to_path_buf().into())
896 }
897 } else {
898 let mut path = file.path().strip_prefix(prefix).ok()?;
899 if !include_filename {
900 path = path.parent()?;
901 }
902 Some(path.into())
903 }
904}
905
906#[cfg(test)]
907mod tests {
908 use super::*;
909 use gpui::MutableAppContext;
910 use std::{
911 path::{Path, PathBuf},
912 sync::Arc,
913 };
914
915 #[gpui::test]
916 fn test_path_for_file(cx: &mut MutableAppContext) {
917 let file = TestFile {
918 path: Path::new("").into(),
919 full_path: PathBuf::from(""),
920 };
921 assert_eq!(path_for_file(&file, 0, false, cx), None);
922 }
923
924 struct TestFile {
925 path: Arc<Path>,
926 full_path: PathBuf,
927 }
928
929 impl language::File for TestFile {
930 fn path(&self) -> &Arc<Path> {
931 &self.path
932 }
933
934 fn full_path(&self, _: &gpui::AppContext) -> PathBuf {
935 self.full_path.clone()
936 }
937
938 fn as_local(&self) -> Option<&dyn language::LocalFile> {
939 todo!()
940 }
941
942 fn mtime(&self) -> std::time::SystemTime {
943 todo!()
944 }
945
946 fn file_name<'a>(&'a self, _: &'a gpui::AppContext) -> &'a std::ffi::OsStr {
947 todo!()
948 }
949
950 fn is_deleted(&self) -> bool {
951 todo!()
952 }
953
954 fn save(
955 &self,
956 _: u64,
957 _: language::Rope,
958 _: clock::Global,
959 _: project::LineEnding,
960 _: &mut MutableAppContext,
961 ) -> gpui::Task<anyhow::Result<(clock::Global, String, std::time::SystemTime)>> {
962 todo!()
963 }
964
965 fn as_any(&self) -> &dyn std::any::Any {
966 todo!()
967 }
968
969 fn to_proto(&self) -> rpc::proto::File {
970 todo!()
971 }
972 }
973}