1use anyhow::{anyhow, Context, Result};
2use futures::FutureExt;
3use gpui::{
4 elements::*, geometry::vector::vec2f, AppContext, Entity, ModelHandle, MutableAppContext,
5 RenderContext, Subscription, Task, View, ViewContext, ViewHandle, WeakViewHandle,
6};
7use language::{Bias, Buffer, File as _, OffsetRangeExt, Point, SelectionGoal};
8use project::{File, FormatTrigger, Project, ProjectEntryId, ProjectPath};
9use rpc::proto::{self, update_view};
10use settings::Settings;
11use smallvec::SmallVec;
12use std::{
13 borrow::Cow,
14 cmp::{self, Ordering},
15 fmt::Write,
16 ops::Range,
17 path::{Path, PathBuf},
18};
19use text::Selection;
20use util::TryFutureExt;
21use workspace::{
22 item::{FollowableItem, Item, ItemEvent, ItemHandle, ProjectItem},
23 searchable::{Direction, SearchEvent, SearchableItem, SearchableItemHandle},
24 ItemId, ItemNavHistory, Pane, StatusItemView, ToolbarItemLocation, Workspace, WorkspaceId,
25};
26
27use crate::{
28 display_map::ToDisplayPoint, link_go_to_definition::hide_link_definition,
29 movement::surrounding_word, persistence::DB, Anchor, Autoscroll, Editor, Event, ExcerptId,
30 MultiBuffer, MultiBufferSnapshot, NavigationData, ToPoint as _, FORMAT_TIMEOUT,
31};
32
33pub const MAX_TAB_TITLE_LEN: usize = 24;
34
35impl FollowableItem for Editor {
36 fn from_state_proto(
37 pane: ViewHandle<workspace::Pane>,
38 project: ModelHandle<Project>,
39 state: &mut Option<proto::view::Variant>,
40 cx: &mut MutableAppContext,
41 ) -> Option<Task<Result<ViewHandle<Self>>>> {
42 let state = if matches!(state, Some(proto::view::Variant::Editor(_))) {
43 if let Some(proto::view::Variant::Editor(state)) = state.take() {
44 state
45 } else {
46 unreachable!()
47 }
48 } else {
49 return None;
50 };
51
52 let buffer = project.update(cx, |project, cx| {
53 project.open_buffer_by_id(state.buffer_id, cx)
54 });
55 Some(cx.spawn(|mut cx| async move {
56 let buffer = buffer.await?;
57 let editor = pane
58 .read_with(&cx, |pane, cx| {
59 pane.items_of_type::<Self>().find(|editor| {
60 editor.read(cx).buffer.read(cx).as_singleton().as_ref() == Some(&buffer)
61 })
62 })
63 .unwrap_or_else(|| {
64 pane.update(&mut cx, |_, cx| {
65 cx.add_view(|cx| Editor::for_buffer(buffer, Some(project), cx))
66 })
67 });
68 editor.update(&mut cx, |editor, cx| {
69 let excerpt_id;
70 let buffer_id;
71 {
72 let buffer = editor.buffer.read(cx).read(cx);
73 let singleton = buffer.as_singleton().unwrap();
74 excerpt_id = singleton.0.clone();
75 buffer_id = singleton.1;
76 }
77 let selections = state
78 .selections
79 .into_iter()
80 .map(|selection| {
81 deserialize_selection(&excerpt_id, buffer_id, selection)
82 .ok_or_else(|| anyhow!("invalid selection"))
83 })
84 .collect::<Result<Vec<_>>>()?;
85 if !selections.is_empty() {
86 editor.set_selections_from_remote(selections, cx);
87 }
88
89 if let Some(anchor) = state.scroll_top_anchor {
90 editor.set_scroll_top_anchor(
91 Anchor {
92 buffer_id: Some(state.buffer_id as usize),
93 excerpt_id,
94 text_anchor: language::proto::deserialize_anchor(anchor)
95 .ok_or_else(|| anyhow!("invalid scroll top"))?,
96 },
97 vec2f(state.scroll_x, state.scroll_y),
98 cx,
99 );
100 }
101
102 Ok::<_, anyhow::Error>(())
103 })?;
104 Ok(editor)
105 }))
106 }
107
108 fn set_leader_replica_id(
109 &mut self,
110 leader_replica_id: Option<u16>,
111 cx: &mut ViewContext<Self>,
112 ) {
113 self.leader_replica_id = leader_replica_id;
114 if self.leader_replica_id.is_some() {
115 self.buffer.update(cx, |buffer, cx| {
116 buffer.remove_active_selections(cx);
117 });
118 } else {
119 self.buffer.update(cx, |buffer, cx| {
120 if self.focused {
121 buffer.set_active_selections(
122 &self.selections.disjoint_anchors(),
123 self.selections.line_mode,
124 self.cursor_shape,
125 cx,
126 );
127 }
128 });
129 }
130 cx.notify();
131 }
132
133 fn to_state_proto(&self, cx: &AppContext) -> Option<proto::view::Variant> {
134 let buffer_id = self.buffer.read(cx).as_singleton()?.read(cx).remote_id();
135 Some(proto::view::Variant::Editor(proto::view::Editor {
136 buffer_id,
137 scroll_top_anchor: Some(language::proto::serialize_anchor(
138 &self.scroll_top_anchor.text_anchor,
139 )),
140 scroll_x: self.scroll_position.x(),
141 scroll_y: self.scroll_position.y(),
142 selections: self
143 .selections
144 .disjoint_anchors()
145 .iter()
146 .map(serialize_selection)
147 .collect(),
148 }))
149 }
150
151 fn add_event_to_update_proto(
152 &self,
153 event: &Self::Event,
154 update: &mut Option<proto::update_view::Variant>,
155 _: &AppContext,
156 ) -> bool {
157 let update =
158 update.get_or_insert_with(|| proto::update_view::Variant::Editor(Default::default()));
159
160 match update {
161 proto::update_view::Variant::Editor(update) => match event {
162 Event::ScrollPositionChanged { .. } => {
163 update.scroll_top_anchor = Some(language::proto::serialize_anchor(
164 &self.scroll_top_anchor.text_anchor,
165 ));
166 update.scroll_x = self.scroll_position.x();
167 update.scroll_y = self.scroll_position.y();
168 true
169 }
170 Event::SelectionsChanged { .. } => {
171 update.selections = self
172 .selections
173 .disjoint_anchors()
174 .iter()
175 .chain(self.selections.pending_anchor().as_ref())
176 .map(serialize_selection)
177 .collect();
178 true
179 }
180 _ => false,
181 },
182 }
183 }
184
185 fn apply_update_proto(
186 &mut self,
187 message: update_view::Variant,
188 cx: &mut ViewContext<Self>,
189 ) -> Result<()> {
190 match message {
191 update_view::Variant::Editor(message) => {
192 let buffer = self.buffer.read(cx);
193 let buffer = buffer.read(cx);
194 let (excerpt_id, buffer_id, _) = buffer.as_singleton().unwrap();
195 let excerpt_id = excerpt_id.clone();
196 drop(buffer);
197
198 let selections = message
199 .selections
200 .into_iter()
201 .filter_map(|selection| {
202 deserialize_selection(&excerpt_id, buffer_id, selection)
203 })
204 .collect::<Vec<_>>();
205
206 if !selections.is_empty() {
207 self.set_selections_from_remote(selections, cx);
208 self.request_autoscroll_remotely(Autoscroll::newest(), cx);
209 } else if let Some(anchor) = message.scroll_top_anchor {
210 self.set_scroll_top_anchor(
211 Anchor {
212 buffer_id: Some(buffer_id),
213 excerpt_id,
214 text_anchor: language::proto::deserialize_anchor(anchor)
215 .ok_or_else(|| anyhow!("invalid scroll top"))?,
216 },
217 vec2f(message.scroll_x, message.scroll_y),
218 cx,
219 );
220 }
221 }
222 }
223 Ok(())
224 }
225
226 fn should_unfollow_on_event(event: &Self::Event, _: &AppContext) -> bool {
227 match event {
228 Event::Edited => true,
229 Event::SelectionsChanged { local } => *local,
230 Event::ScrollPositionChanged { local } => *local,
231 _ => false,
232 }
233 }
234}
235
236fn serialize_selection(selection: &Selection<Anchor>) -> proto::Selection {
237 proto::Selection {
238 id: selection.id as u64,
239 start: Some(language::proto::serialize_anchor(
240 &selection.start.text_anchor,
241 )),
242 end: Some(language::proto::serialize_anchor(
243 &selection.end.text_anchor,
244 )),
245 reversed: selection.reversed,
246 }
247}
248
249fn deserialize_selection(
250 excerpt_id: &ExcerptId,
251 buffer_id: usize,
252 selection: proto::Selection,
253) -> Option<Selection<Anchor>> {
254 Some(Selection {
255 id: selection.id as usize,
256 start: Anchor {
257 buffer_id: Some(buffer_id),
258 excerpt_id: excerpt_id.clone(),
259 text_anchor: language::proto::deserialize_anchor(selection.start?)?,
260 },
261 end: Anchor {
262 buffer_id: Some(buffer_id),
263 excerpt_id: excerpt_id.clone(),
264 text_anchor: language::proto::deserialize_anchor(selection.end?)?,
265 },
266 reversed: selection.reversed,
267 goal: SelectionGoal::None,
268 })
269}
270
271impl Item for Editor {
272 fn navigate(&mut self, data: Box<dyn std::any::Any>, cx: &mut ViewContext<Self>) -> bool {
273 if let Ok(data) = data.downcast::<NavigationData>() {
274 let newest_selection = self.selections.newest::<Point>(cx);
275 let buffer = self.buffer.read(cx).read(cx);
276 let offset = if buffer.can_resolve(&data.cursor_anchor) {
277 data.cursor_anchor.to_point(&buffer)
278 } else {
279 buffer.clip_point(data.cursor_position, Bias::Left)
280 };
281
282 let scroll_top_anchor = if buffer.can_resolve(&data.scroll_top_anchor) {
283 data.scroll_top_anchor
284 } else {
285 buffer.anchor_before(
286 buffer.clip_point(Point::new(data.scroll_top_row, 0), Bias::Left),
287 )
288 };
289
290 drop(buffer);
291
292 if newest_selection.head() == offset {
293 false
294 } else {
295 let nav_history = self.nav_history.take();
296 self.scroll_position = data.scroll_position;
297 self.scroll_top_anchor = scroll_top_anchor;
298 self.change_selections(Some(Autoscroll::fit()), cx, |s| {
299 s.select_ranges([offset..offset])
300 });
301 self.nav_history = nav_history;
302 true
303 }
304 } else {
305 false
306 }
307 }
308
309 fn tab_description<'a>(&'a self, detail: usize, cx: &'a AppContext) -> Option<Cow<'a, str>> {
310 match path_for_buffer(&self.buffer, detail, true, cx)? {
311 Cow::Borrowed(path) => Some(path.to_string_lossy()),
312 Cow::Owned(path) => Some(path.to_string_lossy().to_string().into()),
313 }
314 }
315
316 fn tab_content(
317 &self,
318 detail: Option<usize>,
319 style: &theme::Tab,
320 cx: &AppContext,
321 ) -> ElementBox {
322 Flex::row()
323 .with_child(
324 Label::new(self.title(cx).into(), style.label.clone())
325 .aligned()
326 .boxed(),
327 )
328 .with_children(detail.and_then(|detail| {
329 let path = path_for_buffer(&self.buffer, detail, false, cx)?;
330 let description = path.to_string_lossy();
331 Some(
332 Label::new(
333 if description.len() > MAX_TAB_TITLE_LEN {
334 description[..MAX_TAB_TITLE_LEN].to_string() + "…"
335 } else {
336 description.into()
337 },
338 style.description.text.clone(),
339 )
340 .contained()
341 .with_style(style.description.container)
342 .aligned()
343 .boxed(),
344 )
345 }))
346 .boxed()
347 }
348
349 fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
350 let buffer = self.buffer.read(cx).as_singleton()?;
351 let file = buffer.read(cx).file();
352 File::from_dyn(file).map(|file| ProjectPath {
353 worktree_id: file.worktree_id(cx),
354 path: file.path().clone(),
355 })
356 }
357
358 fn project_entry_ids(&self, cx: &AppContext) -> SmallVec<[ProjectEntryId; 3]> {
359 self.buffer
360 .read(cx)
361 .files(cx)
362 .into_iter()
363 .filter_map(|file| File::from_dyn(Some(file))?.project_entry_id(cx))
364 .collect()
365 }
366
367 fn is_singleton(&self, cx: &AppContext) -> bool {
368 self.buffer.read(cx).is_singleton()
369 }
370
371 fn clone_on_split(&self, cx: &mut ViewContext<Self>) -> Option<Self>
372 where
373 Self: Sized,
374 {
375 Some(self.clone(cx))
376 }
377
378 fn set_nav_history(&mut self, history: ItemNavHistory, _: &mut ViewContext<Self>) {
379 self.nav_history = Some(history);
380 }
381
382 fn deactivated(&mut self, cx: &mut ViewContext<Self>) {
383 let selection = self.selections.newest_anchor();
384 self.push_to_nav_history(selection.head(), None, cx);
385 }
386
387 fn workspace_deactivated(&mut self, cx: &mut ViewContext<Self>) {
388 hide_link_definition(self, cx);
389 self.link_go_to_definition_state.last_mouse_location = None;
390 }
391
392 fn is_dirty(&self, cx: &AppContext) -> bool {
393 self.buffer().read(cx).read(cx).is_dirty()
394 }
395
396 fn has_conflict(&self, cx: &AppContext) -> bool {
397 self.buffer().read(cx).read(cx).has_conflict()
398 }
399
400 fn can_save(&self, cx: &AppContext) -> bool {
401 !self.buffer().read(cx).is_singleton() || self.project_path(cx).is_some()
402 }
403
404 fn save(
405 &mut self,
406 project: ModelHandle<Project>,
407 cx: &mut ViewContext<Self>,
408 ) -> Task<Result<()>> {
409 self.report_event("save editor", cx);
410
411 let buffer = self.buffer().clone();
412 let buffers = buffer.read(cx).all_buffers();
413 let mut timeout = cx.background().timer(FORMAT_TIMEOUT).fuse();
414 let format = project.update(cx, |project, cx| {
415 project.format(buffers, true, FormatTrigger::Save, cx)
416 });
417 cx.spawn(|_, mut cx| async move {
418 let transaction = futures::select_biased! {
419 _ = timeout => {
420 log::warn!("timed out waiting for formatting");
421 None
422 }
423 transaction = format.log_err().fuse() => transaction,
424 };
425
426 buffer
427 .update(&mut cx, |buffer, cx| {
428 if let Some(transaction) = transaction {
429 if !buffer.is_singleton() {
430 buffer.push_transaction(&transaction.0);
431 }
432 }
433
434 buffer.save(cx)
435 })
436 .await?;
437 Ok(())
438 })
439 }
440
441 fn save_as(
442 &mut self,
443 project: ModelHandle<Project>,
444 abs_path: PathBuf,
445 cx: &mut ViewContext<Self>,
446 ) -> Task<Result<()>> {
447 let buffer = self
448 .buffer()
449 .read(cx)
450 .as_singleton()
451 .expect("cannot call save_as on an excerpt list");
452
453 project.update(cx, |project, cx| {
454 project.save_buffer_as(buffer, abs_path, cx)
455 })
456 }
457
458 fn reload(
459 &mut self,
460 project: ModelHandle<Project>,
461 cx: &mut ViewContext<Self>,
462 ) -> Task<Result<()>> {
463 let buffer = self.buffer().clone();
464 let buffers = self.buffer.read(cx).all_buffers();
465 let reload_buffers =
466 project.update(cx, |project, cx| project.reload_buffers(buffers, true, cx));
467 cx.spawn(|this, mut cx| async move {
468 let transaction = reload_buffers.log_err().await;
469 this.update(&mut cx, |editor, cx| {
470 editor.request_autoscroll(Autoscroll::fit(), cx)
471 });
472 buffer.update(&mut cx, |buffer, _| {
473 if let Some(transaction) = transaction {
474 if !buffer.is_singleton() {
475 buffer.push_transaction(&transaction.0);
476 }
477 }
478 });
479 Ok(())
480 })
481 }
482
483 fn git_diff_recalc(
484 &mut self,
485 _project: ModelHandle<Project>,
486 cx: &mut ViewContext<Self>,
487 ) -> Task<Result<()>> {
488 self.buffer().update(cx, |multibuffer, cx| {
489 multibuffer.git_diff_recalc(cx);
490 });
491 Task::ready(Ok(()))
492 }
493
494 fn to_item_events(event: &Self::Event) -> Vec<ItemEvent> {
495 let mut result = Vec::new();
496 match event {
497 Event::Closed => result.push(ItemEvent::CloseItem),
498 Event::Saved | Event::TitleChanged => {
499 result.push(ItemEvent::UpdateTab);
500 result.push(ItemEvent::UpdateBreadcrumbs);
501 }
502 Event::Reparsed => {
503 result.push(ItemEvent::UpdateBreadcrumbs);
504 }
505 Event::SelectionsChanged { local } if *local => {
506 result.push(ItemEvent::UpdateBreadcrumbs);
507 }
508 Event::DirtyChanged => {
509 result.push(ItemEvent::UpdateTab);
510 }
511 Event::BufferEdited => {
512 result.push(ItemEvent::Edit);
513 result.push(ItemEvent::UpdateBreadcrumbs);
514 }
515 _ => {}
516 }
517 result
518 }
519
520 fn as_searchable(&self, handle: &ViewHandle<Self>) -> Option<Box<dyn SearchableItemHandle>> {
521 Some(Box::new(handle.clone()))
522 }
523
524 fn breadcrumb_location(&self) -> ToolbarItemLocation {
525 ToolbarItemLocation::PrimaryLeft { flex: None }
526 }
527
528 fn breadcrumbs(&self, theme: &theme::Theme, cx: &AppContext) -> Option<Vec<ElementBox>> {
529 let cursor = self.selections.newest_anchor().head();
530 let multibuffer = &self.buffer().read(cx);
531 let (buffer_id, symbols) =
532 multibuffer.symbols_containing(cursor, Some(&theme.editor.syntax), cx)?;
533 let buffer = multibuffer.buffer(buffer_id)?;
534
535 let buffer = buffer.read(cx);
536 let filename = buffer
537 .snapshot()
538 .resolve_file_path(
539 cx,
540 self.project
541 .as_ref()
542 .map(|project| project.read(cx).visible_worktrees(cx).count() > 1)
543 .unwrap_or_default(),
544 )
545 .map(|path| path.to_string_lossy().to_string())
546 .unwrap_or_else(|| "untitled".to_string());
547
548 let mut breadcrumbs = vec![Label::new(filename, theme.breadcrumbs.text.clone()).boxed()];
549 breadcrumbs.extend(symbols.into_iter().map(|symbol| {
550 Text::new(symbol.text, theme.breadcrumbs.text.clone())
551 .with_highlights(symbol.highlight_ranges)
552 .boxed()
553 }));
554 Some(breadcrumbs)
555 }
556
557 fn serialized_item_kind() -> Option<&'static str> {
558 Some("Editor")
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 if let Some(project_item) = project.update(cx, |project, cx| {
569 // Look up the path with this key associated, create a self with that path
570 let path = DB.get_path(item_id, workspace_id).ok()?;
571 dbg!(&path);
572 let (worktree, path) = project.find_local_worktree(&path, cx)?;
573 let project_path = ProjectPath {
574 worktree_id: worktree.read(cx).id(),
575 path: path.into(),
576 };
577
578 Some(project.open_path(project_path, cx))
579 }) {
580 cx.spawn(|pane, mut cx| async move {
581 let (_, project_item) = project_item.await?;
582 let buffer = project_item
583 .downcast::<Buffer>()
584 .context("Project item at stored path was not a buffer")?;
585
586 Ok(cx.update(|cx| {
587 cx.add_view(pane, |cx| Editor::for_buffer(buffer, Some(project), cx))
588 }))
589 })
590 } else {
591 Task::ready(Err(anyhow!("Could not load file from stored path")))
592 }
593 }
594}
595
596impl ProjectItem for Editor {
597 type Item = Buffer;
598
599 fn for_project_item(
600 project: ModelHandle<Project>,
601 buffer: ModelHandle<Buffer>,
602 cx: &mut ViewContext<Self>,
603 ) -> Self {
604 Self::for_buffer(buffer, Some(project), cx)
605 }
606}
607
608enum BufferSearchHighlights {}
609impl SearchableItem for Editor {
610 type Match = Range<Anchor>;
611
612 fn to_search_event(event: &Self::Event) -> Option<SearchEvent> {
613 match event {
614 Event::BufferEdited => Some(SearchEvent::MatchesInvalidated),
615 Event::SelectionsChanged { .. } => Some(SearchEvent::ActiveMatchChanged),
616 _ => None,
617 }
618 }
619
620 fn clear_matches(&mut self, cx: &mut ViewContext<Self>) {
621 self.clear_background_highlights::<BufferSearchHighlights>(cx);
622 }
623
624 fn update_matches(&mut self, matches: Vec<Range<Anchor>>, cx: &mut ViewContext<Self>) {
625 self.highlight_background::<BufferSearchHighlights>(
626 matches,
627 |theme| theme.search.match_background,
628 cx,
629 );
630 }
631
632 fn query_suggestion(&mut self, cx: &mut ViewContext<Self>) -> String {
633 let display_map = self.snapshot(cx).display_snapshot;
634 let selection = self.selections.newest::<usize>(cx);
635 if selection.start == selection.end {
636 let point = selection.start.to_display_point(&display_map);
637 let range = surrounding_word(&display_map, point);
638 let range = range.start.to_offset(&display_map, Bias::Left)
639 ..range.end.to_offset(&display_map, Bias::Right);
640 let text: String = display_map.buffer_snapshot.text_for_range(range).collect();
641 if text.trim().is_empty() {
642 String::new()
643 } else {
644 text
645 }
646 } else {
647 display_map
648 .buffer_snapshot
649 .text_for_range(selection.start..selection.end)
650 .collect()
651 }
652 }
653
654 fn activate_match(
655 &mut self,
656 index: usize,
657 matches: Vec<Range<Anchor>>,
658 cx: &mut ViewContext<Self>,
659 ) {
660 self.unfold_ranges([matches[index].clone()], false, cx);
661 self.change_selections(Some(Autoscroll::fit()), cx, |s| {
662 s.select_ranges([matches[index].clone()])
663 });
664 }
665
666 fn match_index_for_direction(
667 &mut self,
668 matches: &Vec<Range<Anchor>>,
669 mut current_index: usize,
670 direction: Direction,
671 cx: &mut ViewContext<Self>,
672 ) -> usize {
673 let buffer = self.buffer().read(cx).snapshot(cx);
674 let cursor = self.selections.newest_anchor().head();
675 if matches[current_index].start.cmp(&cursor, &buffer).is_gt() {
676 if direction == Direction::Prev {
677 if current_index == 0 {
678 current_index = matches.len() - 1;
679 } else {
680 current_index -= 1;
681 }
682 }
683 } else if matches[current_index].end.cmp(&cursor, &buffer).is_lt() {
684 if direction == Direction::Next {
685 current_index = 0;
686 }
687 } else if direction == Direction::Prev {
688 if current_index == 0 {
689 current_index = matches.len() - 1;
690 } else {
691 current_index -= 1;
692 }
693 } else if direction == Direction::Next {
694 if current_index == matches.len() - 1 {
695 current_index = 0
696 } else {
697 current_index += 1;
698 }
699 };
700 current_index
701 }
702
703 fn find_matches(
704 &mut self,
705 query: project::search::SearchQuery,
706 cx: &mut ViewContext<Self>,
707 ) -> Task<Vec<Range<Anchor>>> {
708 let buffer = self.buffer().read(cx).snapshot(cx);
709 cx.background().spawn(async move {
710 let mut ranges = Vec::new();
711 if let Some((_, _, excerpt_buffer)) = buffer.as_singleton() {
712 ranges.extend(
713 query
714 .search(excerpt_buffer.as_rope())
715 .await
716 .into_iter()
717 .map(|range| {
718 buffer.anchor_after(range.start)..buffer.anchor_before(range.end)
719 }),
720 );
721 } else {
722 for excerpt in buffer.excerpt_boundaries_in_range(0..buffer.len()) {
723 let excerpt_range = excerpt.range.context.to_offset(&excerpt.buffer);
724 let rope = excerpt.buffer.as_rope().slice(excerpt_range.clone());
725 ranges.extend(query.search(&rope).await.into_iter().map(|range| {
726 let start = excerpt
727 .buffer
728 .anchor_after(excerpt_range.start + range.start);
729 let end = excerpt
730 .buffer
731 .anchor_before(excerpt_range.start + range.end);
732 buffer.anchor_in_excerpt(excerpt.id.clone(), start)
733 ..buffer.anchor_in_excerpt(excerpt.id.clone(), end)
734 }));
735 }
736 }
737 ranges
738 })
739 }
740
741 fn active_match_index(
742 &mut self,
743 matches: Vec<Range<Anchor>>,
744 cx: &mut ViewContext<Self>,
745 ) -> Option<usize> {
746 active_match_index(
747 &matches,
748 &self.selections.newest_anchor().head(),
749 &self.buffer().read(cx).snapshot(cx),
750 )
751 }
752}
753
754pub fn active_match_index(
755 ranges: &[Range<Anchor>],
756 cursor: &Anchor,
757 buffer: &MultiBufferSnapshot,
758) -> Option<usize> {
759 if ranges.is_empty() {
760 None
761 } else {
762 match ranges.binary_search_by(|probe| {
763 if probe.end.cmp(cursor, &*buffer).is_lt() {
764 Ordering::Less
765 } else if probe.start.cmp(cursor, &*buffer).is_gt() {
766 Ordering::Greater
767 } else {
768 Ordering::Equal
769 }
770 }) {
771 Ok(i) | Err(i) => Some(cmp::min(i, ranges.len() - 1)),
772 }
773 }
774}
775
776pub struct CursorPosition {
777 position: Option<Point>,
778 selected_count: usize,
779 _observe_active_editor: Option<Subscription>,
780}
781
782impl Default for CursorPosition {
783 fn default() -> Self {
784 Self::new()
785 }
786}
787
788impl CursorPosition {
789 pub fn new() -> Self {
790 Self {
791 position: None,
792 selected_count: 0,
793 _observe_active_editor: None,
794 }
795 }
796
797 fn update_position(&mut self, editor: ViewHandle<Editor>, cx: &mut ViewContext<Self>) {
798 let editor = editor.read(cx);
799 let buffer = editor.buffer().read(cx).snapshot(cx);
800
801 self.selected_count = 0;
802 let mut last_selection: Option<Selection<usize>> = None;
803 for selection in editor.selections.all::<usize>(cx) {
804 self.selected_count += selection.end - selection.start;
805 if last_selection
806 .as_ref()
807 .map_or(true, |last_selection| selection.id > last_selection.id)
808 {
809 last_selection = Some(selection);
810 }
811 }
812 self.position = last_selection.map(|s| s.head().to_point(&buffer));
813
814 cx.notify();
815 }
816}
817
818impl Entity for CursorPosition {
819 type Event = ();
820}
821
822impl View for CursorPosition {
823 fn ui_name() -> &'static str {
824 "CursorPosition"
825 }
826
827 fn render(&mut self, cx: &mut RenderContext<Self>) -> ElementBox {
828 if let Some(position) = self.position {
829 let theme = &cx.global::<Settings>().theme.workspace.status_bar;
830 let mut text = format!("{},{}", position.row + 1, position.column + 1);
831 if self.selected_count > 0 {
832 write!(text, " ({} selected)", self.selected_count).unwrap();
833 }
834 Label::new(text, theme.cursor_position.clone()).boxed()
835 } else {
836 Empty::new().boxed()
837 }
838 }
839}
840
841impl StatusItemView for CursorPosition {
842 fn set_active_pane_item(
843 &mut self,
844 active_pane_item: Option<&dyn ItemHandle>,
845 cx: &mut ViewContext<Self>,
846 ) {
847 if let Some(editor) = active_pane_item.and_then(|item| item.downcast::<Editor>()) {
848 self._observe_active_editor = Some(cx.observe(&editor, Self::update_position));
849 self.update_position(editor, cx);
850 } else {
851 self.position = None;
852 self._observe_active_editor = None;
853 }
854
855 cx.notify();
856 }
857}
858
859fn path_for_buffer<'a>(
860 buffer: &ModelHandle<MultiBuffer>,
861 height: usize,
862 include_filename: bool,
863 cx: &'a AppContext,
864) -> Option<Cow<'a, Path>> {
865 let file = buffer.read(cx).as_singleton()?.read(cx).file()?;
866 path_for_file(file, height, include_filename, cx)
867}
868
869fn path_for_file<'a>(
870 file: &'a dyn language::File,
871 mut height: usize,
872 include_filename: bool,
873 cx: &'a AppContext,
874) -> Option<Cow<'a, Path>> {
875 // Ensure we always render at least the filename.
876 height += 1;
877
878 let mut prefix = file.path().as_ref();
879 while height > 0 {
880 if let Some(parent) = prefix.parent() {
881 prefix = parent;
882 height -= 1;
883 } else {
884 break;
885 }
886 }
887
888 // Here we could have just always used `full_path`, but that is very
889 // allocation-heavy and so we try to use a `Cow<Path>` if we haven't
890 // traversed all the way up to the worktree's root.
891 if height > 0 {
892 let full_path = file.full_path(cx);
893 if include_filename {
894 Some(full_path.into())
895 } else {
896 Some(full_path.parent()?.to_path_buf().into())
897 }
898 } else {
899 let mut path = file.path().strip_prefix(prefix).ok()?;
900 if !include_filename {
901 path = path.parent()?;
902 }
903 Some(path.into())
904 }
905}
906
907#[cfg(test)]
908mod tests {
909 use super::*;
910 use gpui::MutableAppContext;
911 use std::{
912 path::{Path, PathBuf},
913 sync::Arc,
914 };
915
916 #[gpui::test]
917 fn test_path_for_file(cx: &mut MutableAppContext) {
918 let file = TestFile {
919 path: Path::new("").into(),
920 full_path: PathBuf::from(""),
921 };
922 assert_eq!(path_for_file(&file, 0, false, cx), None);
923 }
924
925 struct TestFile {
926 path: Arc<Path>,
927 full_path: PathBuf,
928 }
929
930 impl language::File for TestFile {
931 fn path(&self) -> &Arc<Path> {
932 &self.path
933 }
934
935 fn full_path(&self, _: &gpui::AppContext) -> PathBuf {
936 self.full_path.clone()
937 }
938
939 fn as_local(&self) -> Option<&dyn language::LocalFile> {
940 todo!()
941 }
942
943 fn mtime(&self) -> std::time::SystemTime {
944 todo!()
945 }
946
947 fn file_name<'a>(&'a self, _: &'a gpui::AppContext) -> &'a std::ffi::OsStr {
948 todo!()
949 }
950
951 fn is_deleted(&self) -> bool {
952 todo!()
953 }
954
955 fn save(
956 &self,
957 _: u64,
958 _: language::Rope,
959 _: clock::Global,
960 _: project::LineEnding,
961 _: &mut MutableAppContext,
962 ) -> gpui::Task<anyhow::Result<(clock::Global, String, std::time::SystemTime)>> {
963 todo!()
964 }
965
966 fn as_any(&self) -> &dyn std::any::Any {
967 todo!()
968 }
969
970 fn to_proto(&self) -> rpc::proto::File {
971 todo!()
972 }
973 }
974}