1pub use crate::{
2 diagnostic_set::DiagnosticSet,
3 highlight_map::{HighlightId, HighlightMap},
4 proto, BracketPair, Grammar, Language, LanguageConfig, LanguageRegistry, LanguageServerConfig,
5 PLAIN_TEXT,
6};
7use crate::{
8 diagnostic_set::{DiagnosticEntry, DiagnosticGroup},
9 outline::OutlineItem,
10 range_from_lsp, Outline,
11};
12use anyhow::{anyhow, Result};
13use clock::ReplicaId;
14use futures::FutureExt as _;
15use gpui::{fonts::HighlightStyle, AppContext, Entity, ModelContext, MutableAppContext, Task};
16use lazy_static::lazy_static;
17use lsp::LanguageServer;
18use parking_lot::Mutex;
19use postage::{prelude::Stream, sink::Sink, watch};
20use similar::{ChangeTag, TextDiff};
21use smol::future::yield_now;
22use std::{
23 any::Any,
24 cell::RefCell,
25 cmp::{self, Ordering},
26 collections::{BTreeMap, HashMap},
27 ffi::OsString,
28 future::Future,
29 iter::{Iterator, Peekable},
30 ops::{Deref, DerefMut, Range, Sub},
31 path::{Path, PathBuf},
32 str,
33 sync::Arc,
34 time::{Duration, Instant, SystemTime, UNIX_EPOCH},
35 vec,
36};
37use sum_tree::TreeMap;
38use text::{operation_queue::OperationQueue, rope::TextDimension};
39pub use text::{Buffer as TextBuffer, Operation as _, *};
40use theme::SyntaxTheme;
41use tree_sitter::{InputEdit, Parser, QueryCursor, Tree};
42use util::{post_inc, TryFutureExt as _};
43
44#[cfg(any(test, feature = "test-support"))]
45pub use tree_sitter_rust;
46
47pub use lsp::DiagnosticSeverity;
48
49thread_local! {
50 static PARSER: RefCell<Parser> = RefCell::new(Parser::new());
51}
52
53lazy_static! {
54 static ref QUERY_CURSORS: Mutex<Vec<QueryCursor>> = Default::default();
55}
56
57// TODO - Make this configurable
58const INDENT_SIZE: u32 = 4;
59
60pub struct Buffer {
61 text: TextBuffer,
62 file: Option<Box<dyn File>>,
63 saved_version: clock::Global,
64 saved_mtime: SystemTime,
65 language: Option<Arc<Language>>,
66 autoindent_requests: Vec<Arc<AutoindentRequest>>,
67 pending_autoindent: Option<Task<()>>,
68 sync_parse_timeout: Duration,
69 syntax_tree: Mutex<Option<SyntaxTree>>,
70 parsing_in_background: bool,
71 parse_count: usize,
72 diagnostics: DiagnosticSet,
73 remote_selections: TreeMap<ReplicaId, SelectionSet>,
74 selections_update_count: usize,
75 diagnostics_update_count: usize,
76 language_server: Option<LanguageServerState>,
77 deferred_ops: OperationQueue<Operation>,
78 #[cfg(test)]
79 pub(crate) operations: Vec<Operation>,
80}
81
82pub struct BufferSnapshot {
83 text: text::BufferSnapshot,
84 tree: Option<Tree>,
85 diagnostics: DiagnosticSet,
86 diagnostics_update_count: usize,
87 remote_selections: TreeMap<ReplicaId, SelectionSet>,
88 selections_update_count: usize,
89 is_parsing: bool,
90 language: Option<Arc<Language>>,
91 parse_count: usize,
92}
93
94#[derive(Clone, Debug)]
95struct SelectionSet {
96 selections: Arc<[Selection<Anchor>]>,
97 lamport_timestamp: clock::Lamport,
98}
99
100#[derive(Clone, Debug, PartialEq, Eq)]
101pub struct GroupId {
102 source: Arc<str>,
103 id: usize,
104}
105
106#[derive(Clone, Debug, PartialEq, Eq)]
107pub struct Diagnostic {
108 pub code: Option<String>,
109 pub severity: DiagnosticSeverity,
110 pub message: String,
111 pub group_id: usize,
112 pub is_valid: bool,
113 pub is_primary: bool,
114 pub is_disk_based: bool,
115}
116
117struct LanguageServerState {
118 server: Arc<LanguageServer>,
119 latest_snapshot: watch::Sender<Option<LanguageServerSnapshot>>,
120 pending_snapshots: BTreeMap<usize, LanguageServerSnapshot>,
121 next_version: usize,
122 _maintain_server: Task<Option<()>>,
123}
124
125#[derive(Clone)]
126struct LanguageServerSnapshot {
127 buffer_snapshot: text::BufferSnapshot,
128 version: usize,
129 path: Arc<Path>,
130}
131
132#[derive(Clone, Debug)]
133pub enum Operation {
134 Buffer(text::Operation),
135 UpdateDiagnostics {
136 diagnostics: Arc<[DiagnosticEntry<Anchor>]>,
137 lamport_timestamp: clock::Lamport,
138 },
139 UpdateSelections {
140 replica_id: ReplicaId,
141 selections: Arc<[Selection<Anchor>]>,
142 lamport_timestamp: clock::Lamport,
143 },
144}
145
146#[derive(Clone, Debug, Eq, PartialEq)]
147pub enum Event {
148 Edited,
149 Dirtied,
150 Saved,
151 FileHandleChanged,
152 Reloaded,
153 Reparsed,
154 DiagnosticsUpdated,
155 Closed,
156}
157
158pub trait File {
159 fn as_local(&self) -> Option<&dyn LocalFile>;
160
161 fn mtime(&self) -> SystemTime;
162
163 /// Returns the path of this file relative to the worktree's root directory.
164 fn path(&self) -> &Arc<Path>;
165
166 /// Returns the path of this file relative to the worktree's parent directory (this means it
167 /// includes the name of the worktree's root folder).
168 fn full_path(&self, cx: &AppContext) -> PathBuf;
169
170 /// Returns the last component of this handle's absolute path. If this handle refers to the root
171 /// of its worktree, then this method will return the name of the worktree itself.
172 fn file_name(&self, cx: &AppContext) -> OsString;
173
174 fn is_deleted(&self) -> bool;
175
176 fn save(
177 &self,
178 buffer_id: u64,
179 text: Rope,
180 version: clock::Global,
181 cx: &mut MutableAppContext,
182 ) -> Task<Result<(clock::Global, SystemTime)>>;
183
184 fn format_remote(&self, buffer_id: u64, cx: &mut MutableAppContext)
185 -> Option<Task<Result<()>>>;
186
187 fn buffer_updated(&self, buffer_id: u64, operation: Operation, cx: &mut MutableAppContext);
188
189 fn buffer_removed(&self, buffer_id: u64, cx: &mut MutableAppContext);
190
191 fn as_any(&self) -> &dyn Any;
192
193 fn to_proto(&self) -> rpc::proto::File;
194}
195
196pub trait LocalFile: File {
197 /// Returns the absolute path of this file.
198 fn abs_path(&self, cx: &AppContext) -> PathBuf;
199
200 fn load(&self, cx: &AppContext) -> Task<Result<String>>;
201
202 fn buffer_reloaded(
203 &self,
204 buffer_id: u64,
205 version: &clock::Global,
206 mtime: SystemTime,
207 cx: &mut MutableAppContext,
208 );
209}
210
211pub(crate) struct QueryCursorHandle(Option<QueryCursor>);
212
213#[derive(Clone)]
214struct SyntaxTree {
215 tree: Tree,
216 version: clock::Global,
217}
218
219#[derive(Clone)]
220struct AutoindentRequest {
221 before_edit: BufferSnapshot,
222 edited: Vec<Anchor>,
223 inserted: Option<Vec<Range<Anchor>>>,
224}
225
226#[derive(Debug)]
227struct IndentSuggestion {
228 basis_row: u32,
229 indent: bool,
230}
231
232struct TextProvider<'a>(&'a Rope);
233
234struct BufferChunkHighlights<'a> {
235 captures: tree_sitter::QueryCaptures<'a, 'a, TextProvider<'a>>,
236 next_capture: Option<(tree_sitter::QueryMatch<'a, 'a>, usize)>,
237 stack: Vec<(usize, HighlightId)>,
238 highlight_map: HighlightMap,
239 theme: &'a SyntaxTheme,
240 _query_cursor: QueryCursorHandle,
241}
242
243pub struct BufferChunks<'a> {
244 range: Range<usize>,
245 chunks: rope::Chunks<'a>,
246 diagnostic_endpoints: Peekable<vec::IntoIter<DiagnosticEndpoint>>,
247 error_depth: usize,
248 warning_depth: usize,
249 information_depth: usize,
250 hint_depth: usize,
251 highlights: Option<BufferChunkHighlights<'a>>,
252}
253
254#[derive(Clone, Copy, Debug, Default)]
255pub struct Chunk<'a> {
256 pub text: &'a str,
257 pub highlight_style: Option<HighlightStyle>,
258 pub diagnostic: Option<DiagnosticSeverity>,
259}
260
261pub(crate) struct Diff {
262 base_version: clock::Global,
263 new_text: Arc<str>,
264 changes: Vec<(ChangeTag, usize)>,
265}
266
267#[derive(Clone, Copy)]
268struct DiagnosticEndpoint {
269 offset: usize,
270 is_start: bool,
271 severity: DiagnosticSeverity,
272}
273
274impl Buffer {
275 pub fn new<T: Into<Arc<str>>>(
276 replica_id: ReplicaId,
277 base_text: T,
278 cx: &mut ModelContext<Self>,
279 ) -> Self {
280 Self::build(
281 TextBuffer::new(
282 replica_id,
283 cx.model_id() as u64,
284 History::new(base_text.into()),
285 ),
286 None,
287 )
288 }
289
290 pub fn from_file<T: Into<Arc<str>>>(
291 replica_id: ReplicaId,
292 base_text: T,
293 file: Box<dyn File>,
294 cx: &mut ModelContext<Self>,
295 ) -> Self {
296 Self::build(
297 TextBuffer::new(
298 replica_id,
299 cx.model_id() as u64,
300 History::new(base_text.into()),
301 ),
302 Some(file),
303 )
304 }
305
306 pub fn from_proto(
307 replica_id: ReplicaId,
308 message: proto::Buffer,
309 file: Option<Box<dyn File>>,
310 cx: &mut ModelContext<Self>,
311 ) -> Result<Self> {
312 let fragments_len = message.fragments.len();
313 let buffer = TextBuffer::from_parts(
314 replica_id,
315 message.id,
316 &message.visible_text,
317 &message.deleted_text,
318 message
319 .undo_map
320 .into_iter()
321 .map(proto::deserialize_undo_map_entry),
322 message
323 .fragments
324 .into_iter()
325 .enumerate()
326 .map(|(i, fragment)| {
327 proto::deserialize_buffer_fragment(fragment, i, fragments_len)
328 }),
329 message.lamport_timestamp,
330 From::from(message.version),
331 );
332 let mut this = Self::build(buffer, file);
333 for selection_set in message.selections {
334 this.remote_selections.insert(
335 selection_set.replica_id as ReplicaId,
336 SelectionSet {
337 selections: proto::deserialize_selections(selection_set.selections),
338 lamport_timestamp: clock::Lamport {
339 replica_id: selection_set.replica_id as ReplicaId,
340 value: selection_set.lamport_timestamp,
341 },
342 },
343 );
344 }
345 let snapshot = this.snapshot();
346 let entries = proto::deserialize_diagnostics(message.diagnostics);
347 this.apply_diagnostic_update(
348 DiagnosticSet::from_sorted_entries(entries.into_iter().cloned(), &snapshot),
349 cx,
350 );
351
352 let deferred_ops = message
353 .deferred_operations
354 .into_iter()
355 .map(proto::deserialize_operation)
356 .collect::<Result<Vec<_>>>()?;
357 this.apply_ops(deferred_ops, cx)?;
358
359 Ok(this)
360 }
361
362 pub fn to_proto(&self) -> proto::Buffer {
363 proto::Buffer {
364 id: self.remote_id(),
365 file: self.file.as_ref().map(|f| f.to_proto()),
366 visible_text: self.text.text(),
367 deleted_text: self.text.deleted_text(),
368 undo_map: self
369 .text
370 .undo_history()
371 .map(proto::serialize_undo_map_entry)
372 .collect(),
373 version: From::from(&self.version),
374 lamport_timestamp: self.lamport_clock.value,
375 fragments: self
376 .text
377 .fragments()
378 .map(proto::serialize_buffer_fragment)
379 .collect(),
380 selections: self
381 .remote_selections
382 .iter()
383 .map(|(replica_id, set)| proto::SelectionSet {
384 replica_id: *replica_id as u32,
385 selections: proto::serialize_selections(&set.selections),
386 lamport_timestamp: set.lamport_timestamp.value,
387 })
388 .collect(),
389 diagnostics: proto::serialize_diagnostics(self.diagnostics.iter()),
390 deferred_operations: self
391 .deferred_ops
392 .iter()
393 .map(proto::serialize_operation)
394 .chain(
395 self.text
396 .deferred_ops()
397 .map(|op| proto::serialize_operation(&Operation::Buffer(op.clone()))),
398 )
399 .collect(),
400 }
401 }
402
403 pub fn with_language(mut self, language: Arc<Language>, cx: &mut ModelContext<Self>) -> Self {
404 self.set_language(Some(language), cx);
405 self
406 }
407
408 pub fn with_language_server(
409 mut self,
410 server: Arc<LanguageServer>,
411 cx: &mut ModelContext<Self>,
412 ) -> Self {
413 self.set_language_server(Some(server), cx);
414 self
415 }
416
417 fn build(buffer: TextBuffer, file: Option<Box<dyn File>>) -> Self {
418 let saved_mtime;
419 if let Some(file) = file.as_ref() {
420 saved_mtime = file.mtime();
421 } else {
422 saved_mtime = UNIX_EPOCH;
423 }
424
425 Self {
426 saved_mtime,
427 saved_version: buffer.version(),
428 text: buffer,
429 file,
430 syntax_tree: Mutex::new(None),
431 parsing_in_background: false,
432 parse_count: 0,
433 sync_parse_timeout: Duration::from_millis(1),
434 autoindent_requests: Default::default(),
435 pending_autoindent: Default::default(),
436 language: None,
437 remote_selections: Default::default(),
438 selections_update_count: 0,
439 diagnostics: Default::default(),
440 diagnostics_update_count: 0,
441 language_server: None,
442 deferred_ops: OperationQueue::new(),
443 #[cfg(test)]
444 operations: Default::default(),
445 }
446 }
447
448 pub fn snapshot(&self) -> BufferSnapshot {
449 BufferSnapshot {
450 text: self.text.snapshot(),
451 tree: self.syntax_tree(),
452 remote_selections: self.remote_selections.clone(),
453 diagnostics: self.diagnostics.clone(),
454 diagnostics_update_count: self.diagnostics_update_count,
455 is_parsing: self.parsing_in_background,
456 language: self.language.clone(),
457 parse_count: self.parse_count,
458 selections_update_count: self.selections_update_count,
459 }
460 }
461
462 pub fn file(&self) -> Option<&dyn File> {
463 self.file.as_deref()
464 }
465
466 pub fn format(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
467 let file = if let Some(file) = self.file.as_ref() {
468 file
469 } else {
470 return Task::ready(Err(anyhow!("buffer has no file")));
471 };
472
473 if let Some(LanguageServerState { server, .. }) = self.language_server.as_ref() {
474 let server = server.clone();
475 let abs_path = file.as_local().unwrap().abs_path(cx);
476 let version = self.version();
477 cx.spawn(|this, mut cx| async move {
478 let edits = server
479 .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
480 text_document: lsp::TextDocumentIdentifier::new(
481 lsp::Url::from_file_path(&abs_path).unwrap(),
482 ),
483 options: Default::default(),
484 work_done_progress_params: Default::default(),
485 })
486 .await?;
487
488 if let Some(edits) = edits {
489 this.update(&mut cx, |this, cx| {
490 if this.version == version {
491 for edit in &edits {
492 let range = range_from_lsp(edit.range);
493 if this.clip_point_utf16(range.start, Bias::Left) != range.start
494 || this.clip_point_utf16(range.end, Bias::Left) != range.end
495 {
496 return Err(anyhow!(
497 "invalid formatting edits received from language server"
498 ));
499 }
500 }
501
502 for edit in edits.into_iter().rev() {
503 this.edit([range_from_lsp(edit.range)], edit.new_text, cx);
504 }
505 Ok(())
506 } else {
507 Err(anyhow!("buffer edited since starting to format"))
508 }
509 })
510 } else {
511 Ok(())
512 }
513 })
514 } else {
515 let format = file.format_remote(self.remote_id(), cx.as_mut());
516 cx.spawn(|_, _| async move {
517 if let Some(format) = format {
518 format.await?;
519 }
520 Ok(())
521 })
522 }
523 }
524
525 pub fn save(
526 &mut self,
527 cx: &mut ModelContext<Self>,
528 ) -> Task<Result<(clock::Global, SystemTime)>> {
529 let file = if let Some(file) = self.file.as_ref() {
530 file
531 } else {
532 return Task::ready(Err(anyhow!("buffer has no file")));
533 };
534 let text = self.as_rope().clone();
535 let version = self.version();
536 let save = file.save(self.remote_id(), text, version, cx.as_mut());
537 cx.spawn(|this, mut cx| async move {
538 let (version, mtime) = save.await?;
539 this.update(&mut cx, |this, cx| {
540 this.did_save(version.clone(), mtime, None, cx);
541 });
542 Ok((version, mtime))
543 })
544 }
545
546 pub fn set_language(&mut self, language: Option<Arc<Language>>, cx: &mut ModelContext<Self>) {
547 self.language = language;
548 self.reparse(cx);
549 }
550
551 pub fn set_language_server(
552 &mut self,
553 language_server: Option<Arc<lsp::LanguageServer>>,
554 cx: &mut ModelContext<Self>,
555 ) {
556 self.language_server = if let Some(server) = language_server {
557 let (latest_snapshot_tx, mut latest_snapshot_rx) = watch::channel();
558 Some(LanguageServerState {
559 latest_snapshot: latest_snapshot_tx,
560 pending_snapshots: Default::default(),
561 next_version: 0,
562 server: server.clone(),
563 _maintain_server: cx.background().spawn(
564 async move {
565 let mut prev_snapshot: Option<LanguageServerSnapshot> = None;
566 while let Some(snapshot) = latest_snapshot_rx.recv().await {
567 if let Some(snapshot) = snapshot {
568 let uri = lsp::Url::from_file_path(&snapshot.path).unwrap();
569 if let Some(prev_snapshot) = prev_snapshot {
570 let changes = lsp::DidChangeTextDocumentParams {
571 text_document: lsp::VersionedTextDocumentIdentifier::new(
572 uri,
573 snapshot.version as i32,
574 ),
575 content_changes: snapshot
576 .buffer_snapshot
577 .edits_since::<(PointUtf16, usize)>(
578 prev_snapshot.buffer_snapshot.version(),
579 )
580 .map(|edit| {
581 let edit_start = edit.new.start.0;
582 let edit_end = edit_start
583 + (edit.old.end.0 - edit.old.start.0);
584 let new_text = snapshot
585 .buffer_snapshot
586 .text_for_range(
587 edit.new.start.1..edit.new.end.1,
588 )
589 .collect();
590 lsp::TextDocumentContentChangeEvent {
591 range: Some(lsp::Range::new(
592 lsp::Position::new(
593 edit_start.row,
594 edit_start.column,
595 ),
596 lsp::Position::new(
597 edit_end.row,
598 edit_end.column,
599 ),
600 )),
601 range_length: None,
602 text: new_text,
603 }
604 })
605 .collect(),
606 };
607 server
608 .notify::<lsp::notification::DidChangeTextDocument>(changes)
609 .await?;
610 } else {
611 server
612 .notify::<lsp::notification::DidOpenTextDocument>(
613 lsp::DidOpenTextDocumentParams {
614 text_document: lsp::TextDocumentItem::new(
615 uri,
616 Default::default(),
617 snapshot.version as i32,
618 snapshot.buffer_snapshot.text().to_string(),
619 ),
620 },
621 )
622 .await?;
623 }
624
625 prev_snapshot = Some(snapshot);
626 }
627 }
628 Ok(())
629 }
630 .log_err(),
631 ),
632 })
633 } else {
634 None
635 };
636
637 self.update_language_server(cx);
638 }
639
640 pub fn did_save(
641 &mut self,
642 version: clock::Global,
643 mtime: SystemTime,
644 new_file: Option<Box<dyn File>>,
645 cx: &mut ModelContext<Self>,
646 ) {
647 self.saved_mtime = mtime;
648 self.saved_version = version;
649 if let Some(new_file) = new_file {
650 self.file = Some(new_file);
651 }
652 if let Some((state, local_file)) = &self
653 .language_server
654 .as_ref()
655 .zip(self.file.as_ref().and_then(|f| f.as_local()))
656 {
657 cx.background()
658 .spawn(
659 state
660 .server
661 .notify::<lsp::notification::DidSaveTextDocument>(
662 lsp::DidSaveTextDocumentParams {
663 text_document: lsp::TextDocumentIdentifier {
664 uri: lsp::Url::from_file_path(local_file.abs_path(cx)).unwrap(),
665 },
666 text: None,
667 },
668 ),
669 )
670 .detach()
671 }
672 cx.emit(Event::Saved);
673 }
674
675 pub fn did_reload(
676 &mut self,
677 version: clock::Global,
678 mtime: SystemTime,
679 cx: &mut ModelContext<Self>,
680 ) {
681 self.saved_mtime = mtime;
682 self.saved_version = version;
683 if let Some(file) = self.file.as_ref().and_then(|f| f.as_local()) {
684 file.buffer_reloaded(self.remote_id(), &self.saved_version, self.saved_mtime, cx);
685 }
686 cx.emit(Event::Reloaded);
687 cx.notify();
688 }
689
690 pub fn file_updated(
691 &mut self,
692 new_file: Box<dyn File>,
693 cx: &mut ModelContext<Self>,
694 ) -> Task<()> {
695 let old_file = if let Some(file) = self.file.as_ref() {
696 file
697 } else {
698 return Task::ready(());
699 };
700 let mut file_changed = false;
701 let mut task = Task::ready(());
702
703 if new_file.path() != old_file.path() {
704 file_changed = true;
705 }
706
707 if new_file.is_deleted() {
708 if !old_file.is_deleted() {
709 file_changed = true;
710 if !self.is_dirty() {
711 cx.emit(Event::Dirtied);
712 }
713 }
714 } else {
715 let new_mtime = new_file.mtime();
716 if new_mtime != old_file.mtime() {
717 file_changed = true;
718
719 if !self.is_dirty() {
720 task = cx.spawn(|this, mut cx| {
721 async move {
722 let new_text = this.read_with(&cx, |this, cx| {
723 this.file
724 .as_ref()
725 .and_then(|file| file.as_local().map(|f| f.load(cx)))
726 });
727 if let Some(new_text) = new_text {
728 let new_text = new_text.await?;
729 let diff = this
730 .read_with(&cx, |this, cx| this.diff(new_text.into(), cx))
731 .await;
732 this.update(&mut cx, |this, cx| {
733 if this.apply_diff(diff, cx) {
734 this.did_reload(this.version(), new_mtime, cx);
735 }
736 });
737 }
738 Ok(())
739 }
740 .log_err()
741 .map(drop)
742 });
743 }
744 }
745 }
746
747 if file_changed {
748 cx.emit(Event::FileHandleChanged);
749 }
750 self.file = Some(new_file);
751 task
752 }
753
754 pub fn close(&mut self, cx: &mut ModelContext<Self>) {
755 cx.emit(Event::Closed);
756 }
757
758 pub fn language(&self) -> Option<&Arc<Language>> {
759 self.language.as_ref()
760 }
761
762 pub fn parse_count(&self) -> usize {
763 self.parse_count
764 }
765
766 pub fn selections_update_count(&self) -> usize {
767 self.selections_update_count
768 }
769
770 pub fn diagnostics_update_count(&self) -> usize {
771 self.diagnostics_update_count
772 }
773
774 pub(crate) fn syntax_tree(&self) -> Option<Tree> {
775 if let Some(syntax_tree) = self.syntax_tree.lock().as_mut() {
776 self.interpolate_tree(syntax_tree);
777 Some(syntax_tree.tree.clone())
778 } else {
779 None
780 }
781 }
782
783 #[cfg(any(test, feature = "test-support"))]
784 pub fn is_parsing(&self) -> bool {
785 self.parsing_in_background
786 }
787
788 #[cfg(test)]
789 pub fn set_sync_parse_timeout(&mut self, timeout: Duration) {
790 self.sync_parse_timeout = timeout;
791 }
792
793 fn reparse(&mut self, cx: &mut ModelContext<Self>) -> bool {
794 if self.parsing_in_background {
795 return false;
796 }
797
798 if let Some(grammar) = self.grammar().cloned() {
799 let old_tree = self.syntax_tree();
800 let text = self.as_rope().clone();
801 let parsed_version = self.version();
802 let parse_task = cx.background().spawn({
803 let grammar = grammar.clone();
804 async move { Self::parse_text(&text, old_tree, &grammar) }
805 });
806
807 match cx
808 .background()
809 .block_with_timeout(self.sync_parse_timeout, parse_task)
810 {
811 Ok(new_tree) => {
812 self.did_finish_parsing(new_tree, parsed_version, cx);
813 return true;
814 }
815 Err(parse_task) => {
816 self.parsing_in_background = true;
817 cx.spawn(move |this, mut cx| async move {
818 let new_tree = parse_task.await;
819 this.update(&mut cx, move |this, cx| {
820 let grammar_changed = this
821 .grammar()
822 .map_or(true, |curr_grammar| !Arc::ptr_eq(&grammar, curr_grammar));
823 let parse_again =
824 this.version.changed_since(&parsed_version) || grammar_changed;
825 this.parsing_in_background = false;
826 this.did_finish_parsing(new_tree, parsed_version, cx);
827
828 if parse_again && this.reparse(cx) {
829 return;
830 }
831 });
832 })
833 .detach();
834 }
835 }
836 }
837 false
838 }
839
840 fn parse_text(text: &Rope, old_tree: Option<Tree>, grammar: &Grammar) -> Tree {
841 PARSER.with(|parser| {
842 let mut parser = parser.borrow_mut();
843 parser
844 .set_language(grammar.ts_language)
845 .expect("incompatible grammar");
846 let mut chunks = text.chunks_in_range(0..text.len());
847 let tree = parser
848 .parse_with(
849 &mut move |offset, _| {
850 chunks.seek(offset);
851 chunks.next().unwrap_or("").as_bytes()
852 },
853 old_tree.as_ref(),
854 )
855 .unwrap();
856 tree
857 })
858 }
859
860 fn interpolate_tree(&self, tree: &mut SyntaxTree) {
861 for edit in self.edits_since::<(usize, Point)>(&tree.version) {
862 let (bytes, lines) = edit.flatten();
863 tree.tree.edit(&InputEdit {
864 start_byte: bytes.new.start,
865 old_end_byte: bytes.new.start + bytes.old.len(),
866 new_end_byte: bytes.new.end,
867 start_position: lines.new.start.to_ts_point(),
868 old_end_position: (lines.new.start + (lines.old.end - lines.old.start))
869 .to_ts_point(),
870 new_end_position: lines.new.end.to_ts_point(),
871 });
872 }
873 tree.version = self.version();
874 }
875
876 fn did_finish_parsing(
877 &mut self,
878 tree: Tree,
879 version: clock::Global,
880 cx: &mut ModelContext<Self>,
881 ) {
882 self.parse_count += 1;
883 *self.syntax_tree.lock() = Some(SyntaxTree { tree, version });
884 self.request_autoindent(cx);
885 cx.emit(Event::Reparsed);
886 cx.notify();
887 }
888
889 pub fn update_diagnostics<T>(
890 &mut self,
891 version: Option<i32>,
892 mut diagnostics: Vec<DiagnosticEntry<T>>,
893 cx: &mut ModelContext<Self>,
894 ) -> Result<()>
895 where
896 T: Copy + Ord + TextDimension + Sub<Output = T> + Clip + ToPoint,
897 {
898 fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
899 Ordering::Equal
900 .then_with(|| b.is_primary.cmp(&a.is_primary))
901 .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
902 .then_with(|| a.severity.cmp(&b.severity))
903 .then_with(|| a.message.cmp(&b.message))
904 }
905
906 let version = version.map(|version| version as usize);
907 let content =
908 if let Some((version, language_server)) = version.zip(self.language_server.as_mut()) {
909 language_server
910 .pending_snapshots
911 .retain(|&v, _| v >= version);
912 let snapshot = language_server
913 .pending_snapshots
914 .get(&version)
915 .ok_or_else(|| anyhow!("missing snapshot"))?;
916 &snapshot.buffer_snapshot
917 } else {
918 self.deref()
919 };
920
921 diagnostics.sort_unstable_by(|a, b| {
922 Ordering::Equal
923 .then_with(|| a.range.start.cmp(&b.range.start))
924 .then_with(|| b.range.end.cmp(&a.range.end))
925 .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
926 });
927
928 let mut sanitized_diagnostics = Vec::new();
929 let mut edits_since_save = content.edits_since::<T>(&self.saved_version).peekable();
930 let mut last_edit_old_end = T::default();
931 let mut last_edit_new_end = T::default();
932 'outer: for entry in diagnostics {
933 let mut start = entry.range.start;
934 let mut end = entry.range.end;
935
936 // Some diagnostics are based on files on disk instead of buffers'
937 // current contents. Adjust these diagnostics' ranges to reflect
938 // any unsaved edits.
939 if entry.diagnostic.is_disk_based {
940 while let Some(edit) = edits_since_save.peek() {
941 if edit.old.end <= start {
942 last_edit_old_end = edit.old.end;
943 last_edit_new_end = edit.new.end;
944 edits_since_save.next();
945 } else if edit.old.start <= end && edit.old.end >= start {
946 continue 'outer;
947 } else {
948 break;
949 }
950 }
951
952 let start_overshoot = start - last_edit_old_end;
953 start = last_edit_new_end;
954 start.add_assign(&start_overshoot);
955
956 let end_overshoot = end - last_edit_old_end;
957 end = last_edit_new_end;
958 end.add_assign(&end_overshoot);
959 }
960
961 let range = start.clip(Bias::Left, content)..end.clip(Bias::Right, content);
962 let mut range = range.start.to_point(content)..range.end.to_point(content);
963 // Expand empty ranges by one character
964 if range.start == range.end {
965 range.end.column += 1;
966 range.end = content.clip_point(range.end, Bias::Right);
967 if range.start == range.end && range.end.column > 0 {
968 range.start.column -= 1;
969 range.start = content.clip_point(range.start, Bias::Left);
970 }
971 }
972
973 sanitized_diagnostics.push(DiagnosticEntry {
974 range,
975 diagnostic: entry.diagnostic,
976 });
977 }
978 drop(edits_since_save);
979
980 let set = DiagnosticSet::new(sanitized_diagnostics, content);
981 self.apply_diagnostic_update(set.clone(), cx);
982
983 let op = Operation::UpdateDiagnostics {
984 diagnostics: set.iter().cloned().collect(),
985 lamport_timestamp: self.text.lamport_clock.tick(),
986 };
987 self.send_operation(op, cx);
988 Ok(())
989 }
990
991 fn request_autoindent(&mut self, cx: &mut ModelContext<Self>) {
992 if let Some(indent_columns) = self.compute_autoindents() {
993 let indent_columns = cx.background().spawn(indent_columns);
994 match cx
995 .background()
996 .block_with_timeout(Duration::from_micros(500), indent_columns)
997 {
998 Ok(indent_columns) => self.apply_autoindents(indent_columns, cx),
999 Err(indent_columns) => {
1000 self.pending_autoindent = Some(cx.spawn(|this, mut cx| async move {
1001 let indent_columns = indent_columns.await;
1002 this.update(&mut cx, |this, cx| {
1003 this.apply_autoindents(indent_columns, cx);
1004 });
1005 }));
1006 }
1007 }
1008 }
1009 }
1010
1011 fn compute_autoindents(&self) -> Option<impl Future<Output = BTreeMap<u32, u32>>> {
1012 let max_rows_between_yields = 100;
1013 let snapshot = self.snapshot();
1014 if snapshot.language.is_none()
1015 || snapshot.tree.is_none()
1016 || self.autoindent_requests.is_empty()
1017 {
1018 return None;
1019 }
1020
1021 let autoindent_requests = self.autoindent_requests.clone();
1022 Some(async move {
1023 let mut indent_columns = BTreeMap::new();
1024 for request in autoindent_requests {
1025 let old_to_new_rows = request
1026 .edited
1027 .iter()
1028 .map(|anchor| anchor.summary::<Point>(&request.before_edit).row)
1029 .zip(
1030 request
1031 .edited
1032 .iter()
1033 .map(|anchor| anchor.summary::<Point>(&snapshot).row),
1034 )
1035 .collect::<BTreeMap<u32, u32>>();
1036
1037 let mut old_suggestions = HashMap::<u32, u32>::default();
1038 let old_edited_ranges =
1039 contiguous_ranges(old_to_new_rows.keys().copied(), max_rows_between_yields);
1040 for old_edited_range in old_edited_ranges {
1041 let suggestions = request
1042 .before_edit
1043 .suggest_autoindents(old_edited_range.clone())
1044 .into_iter()
1045 .flatten();
1046 for (old_row, suggestion) in old_edited_range.zip(suggestions) {
1047 let indentation_basis = old_to_new_rows
1048 .get(&suggestion.basis_row)
1049 .and_then(|from_row| old_suggestions.get(from_row).copied())
1050 .unwrap_or_else(|| {
1051 request
1052 .before_edit
1053 .indent_column_for_line(suggestion.basis_row)
1054 });
1055 let delta = if suggestion.indent { INDENT_SIZE } else { 0 };
1056 old_suggestions.insert(
1057 *old_to_new_rows.get(&old_row).unwrap(),
1058 indentation_basis + delta,
1059 );
1060 }
1061 yield_now().await;
1062 }
1063
1064 // At this point, old_suggestions contains the suggested indentation for all edited lines with respect to the state of the
1065 // buffer before the edit, but keyed by the row for these lines after the edits were applied.
1066 let new_edited_row_ranges =
1067 contiguous_ranges(old_to_new_rows.values().copied(), max_rows_between_yields);
1068 for new_edited_row_range in new_edited_row_ranges {
1069 let suggestions = snapshot
1070 .suggest_autoindents(new_edited_row_range.clone())
1071 .into_iter()
1072 .flatten();
1073 for (new_row, suggestion) in new_edited_row_range.zip(suggestions) {
1074 let delta = if suggestion.indent { INDENT_SIZE } else { 0 };
1075 let new_indentation = indent_columns
1076 .get(&suggestion.basis_row)
1077 .copied()
1078 .unwrap_or_else(|| {
1079 snapshot.indent_column_for_line(suggestion.basis_row)
1080 })
1081 + delta;
1082 if old_suggestions
1083 .get(&new_row)
1084 .map_or(true, |old_indentation| new_indentation != *old_indentation)
1085 {
1086 indent_columns.insert(new_row, new_indentation);
1087 }
1088 }
1089 yield_now().await;
1090 }
1091
1092 if let Some(inserted) = request.inserted.as_ref() {
1093 let inserted_row_ranges = contiguous_ranges(
1094 inserted
1095 .iter()
1096 .map(|range| range.to_point(&snapshot))
1097 .flat_map(|range| range.start.row..range.end.row + 1),
1098 max_rows_between_yields,
1099 );
1100 for inserted_row_range in inserted_row_ranges {
1101 let suggestions = snapshot
1102 .suggest_autoindents(inserted_row_range.clone())
1103 .into_iter()
1104 .flatten();
1105 for (row, suggestion) in inserted_row_range.zip(suggestions) {
1106 let delta = if suggestion.indent { INDENT_SIZE } else { 0 };
1107 let new_indentation = indent_columns
1108 .get(&suggestion.basis_row)
1109 .copied()
1110 .unwrap_or_else(|| {
1111 snapshot.indent_column_for_line(suggestion.basis_row)
1112 })
1113 + delta;
1114 indent_columns.insert(row, new_indentation);
1115 }
1116 yield_now().await;
1117 }
1118 }
1119 }
1120 indent_columns
1121 })
1122 }
1123
1124 fn apply_autoindents(
1125 &mut self,
1126 indent_columns: BTreeMap<u32, u32>,
1127 cx: &mut ModelContext<Self>,
1128 ) {
1129 self.autoindent_requests.clear();
1130 self.start_transaction();
1131 for (row, indent_column) in &indent_columns {
1132 self.set_indent_column_for_line(*row, *indent_column, cx);
1133 }
1134 self.end_transaction(cx);
1135 }
1136
1137 fn set_indent_column_for_line(&mut self, row: u32, column: u32, cx: &mut ModelContext<Self>) {
1138 let current_column = self.indent_column_for_line(row);
1139 if column > current_column {
1140 let offset = Point::new(row, 0).to_offset(&*self);
1141 self.edit(
1142 [offset..offset],
1143 " ".repeat((column - current_column) as usize),
1144 cx,
1145 );
1146 } else if column < current_column {
1147 self.edit(
1148 [Point::new(row, 0)..Point::new(row, current_column - column)],
1149 "",
1150 cx,
1151 );
1152 }
1153 }
1154
1155 pub(crate) fn diff(&self, new_text: Arc<str>, cx: &AppContext) -> Task<Diff> {
1156 // TODO: it would be nice to not allocate here.
1157 let old_text = self.text();
1158 let base_version = self.version();
1159 cx.background().spawn(async move {
1160 let changes = TextDiff::from_lines(old_text.as_str(), new_text.as_ref())
1161 .iter_all_changes()
1162 .map(|c| (c.tag(), c.value().len()))
1163 .collect::<Vec<_>>();
1164 Diff {
1165 base_version,
1166 new_text,
1167 changes,
1168 }
1169 })
1170 }
1171
1172 pub(crate) fn apply_diff(&mut self, diff: Diff, cx: &mut ModelContext<Self>) -> bool {
1173 if self.version == diff.base_version {
1174 self.start_transaction();
1175 let mut offset = 0;
1176 for (tag, len) in diff.changes {
1177 let range = offset..(offset + len);
1178 match tag {
1179 ChangeTag::Equal => offset += len,
1180 ChangeTag::Delete => self.edit(Some(range), "", cx),
1181 ChangeTag::Insert => {
1182 self.edit(Some(offset..offset), &diff.new_text[range], cx);
1183 offset += len;
1184 }
1185 }
1186 }
1187 self.end_transaction(cx);
1188 true
1189 } else {
1190 false
1191 }
1192 }
1193
1194 pub fn is_dirty(&self) -> bool {
1195 !self.saved_version.observed_all(&self.version)
1196 || self.file.as_ref().map_or(false, |file| file.is_deleted())
1197 }
1198
1199 pub fn has_conflict(&self) -> bool {
1200 !self.saved_version.observed_all(&self.version)
1201 && self
1202 .file
1203 .as_ref()
1204 .map_or(false, |file| file.mtime() > self.saved_mtime)
1205 }
1206
1207 pub fn subscribe(&mut self) -> Subscription {
1208 self.text.subscribe()
1209 }
1210
1211 pub fn start_transaction(&mut self) -> Option<TransactionId> {
1212 self.start_transaction_at(Instant::now())
1213 }
1214
1215 pub fn start_transaction_at(&mut self, now: Instant) -> Option<TransactionId> {
1216 self.text.start_transaction_at(now)
1217 }
1218
1219 pub fn end_transaction(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1220 self.end_transaction_at(Instant::now(), cx)
1221 }
1222
1223 pub fn end_transaction_at(
1224 &mut self,
1225 now: Instant,
1226 cx: &mut ModelContext<Self>,
1227 ) -> Option<TransactionId> {
1228 if let Some((transaction_id, start_version)) = self.text.end_transaction_at(now) {
1229 let was_dirty = start_version != self.saved_version;
1230 self.did_edit(&start_version, was_dirty, cx);
1231 Some(transaction_id)
1232 } else {
1233 None
1234 }
1235 }
1236
1237 pub fn set_active_selections(
1238 &mut self,
1239 selections: Arc<[Selection<Anchor>]>,
1240 cx: &mut ModelContext<Self>,
1241 ) {
1242 let lamport_timestamp = self.text.lamport_clock.tick();
1243 self.remote_selections.insert(
1244 self.text.replica_id(),
1245 SelectionSet {
1246 selections: selections.clone(),
1247 lamport_timestamp,
1248 },
1249 );
1250 self.send_operation(
1251 Operation::UpdateSelections {
1252 replica_id: self.text.replica_id(),
1253 selections,
1254 lamport_timestamp,
1255 },
1256 cx,
1257 );
1258 }
1259
1260 pub fn remove_active_selections(&mut self, cx: &mut ModelContext<Self>) {
1261 self.set_active_selections(Arc::from([]), cx);
1262 }
1263
1264 fn update_language_server(&mut self, cx: &AppContext) {
1265 let language_server = if let Some(language_server) = self.language_server.as_mut() {
1266 language_server
1267 } else {
1268 return;
1269 };
1270 let abs_path = self
1271 .file
1272 .as_ref()
1273 .and_then(|f| f.as_local())
1274 .map_or(Path::new("/").to_path_buf(), |file| file.abs_path(cx));
1275
1276 let version = post_inc(&mut language_server.next_version);
1277 let snapshot = LanguageServerSnapshot {
1278 buffer_snapshot: self.text.snapshot(),
1279 version,
1280 path: Arc::from(abs_path),
1281 };
1282 language_server
1283 .pending_snapshots
1284 .insert(version, snapshot.clone());
1285 let _ = language_server
1286 .latest_snapshot
1287 .blocking_send(Some(snapshot));
1288 }
1289
1290 pub fn edit<I, S, T>(&mut self, ranges_iter: I, new_text: T, cx: &mut ModelContext<Self>)
1291 where
1292 I: IntoIterator<Item = Range<S>>,
1293 S: ToOffset,
1294 T: Into<String>,
1295 {
1296 self.edit_internal(ranges_iter, new_text, false, cx)
1297 }
1298
1299 pub fn edit_with_autoindent<I, S, T>(
1300 &mut self,
1301 ranges_iter: I,
1302 new_text: T,
1303 cx: &mut ModelContext<Self>,
1304 ) where
1305 I: IntoIterator<Item = Range<S>>,
1306 S: ToOffset,
1307 T: Into<String>,
1308 {
1309 self.edit_internal(ranges_iter, new_text, true, cx)
1310 }
1311
1312 /*
1313 impl Buffer
1314 pub fn edit
1315 pub fn edit_internal
1316 pub fn edit_with_autoindent
1317 */
1318
1319 pub fn edit_internal<I, S, T>(
1320 &mut self,
1321 ranges_iter: I,
1322 new_text: T,
1323 autoindent: bool,
1324 cx: &mut ModelContext<Self>,
1325 ) where
1326 I: IntoIterator<Item = Range<S>>,
1327 S: ToOffset,
1328 T: Into<String>,
1329 {
1330 let new_text = new_text.into();
1331
1332 // Skip invalid ranges and coalesce contiguous ones.
1333 let mut ranges: Vec<Range<usize>> = Vec::new();
1334 for range in ranges_iter {
1335 let range = range.start.to_offset(self)..range.end.to_offset(self);
1336 if !new_text.is_empty() || !range.is_empty() {
1337 if let Some(prev_range) = ranges.last_mut() {
1338 if prev_range.end >= range.start {
1339 prev_range.end = cmp::max(prev_range.end, range.end);
1340 } else {
1341 ranges.push(range);
1342 }
1343 } else {
1344 ranges.push(range);
1345 }
1346 }
1347 }
1348 if ranges.is_empty() {
1349 return;
1350 }
1351
1352 self.start_transaction();
1353 self.pending_autoindent.take();
1354 let autoindent_request = if autoindent && self.language.is_some() {
1355 let before_edit = self.snapshot();
1356 let edited = ranges
1357 .iter()
1358 .filter_map(|range| {
1359 let start = range.start.to_point(self);
1360 if new_text.starts_with('\n') && start.column == self.line_len(start.row) {
1361 None
1362 } else {
1363 Some(self.anchor_before(range.start))
1364 }
1365 })
1366 .collect();
1367 Some((before_edit, edited))
1368 } else {
1369 None
1370 };
1371
1372 let first_newline_ix = new_text.find('\n');
1373 let new_text_len = new_text.len();
1374
1375 let edit = self.text.edit(ranges.iter().cloned(), new_text);
1376
1377 if let Some((before_edit, edited)) = autoindent_request {
1378 let mut inserted = None;
1379 if let Some(first_newline_ix) = first_newline_ix {
1380 let mut delta = 0isize;
1381 inserted = Some(
1382 ranges
1383 .iter()
1384 .map(|range| {
1385 let start =
1386 (delta + range.start as isize) as usize + first_newline_ix + 1;
1387 let end = (delta + range.start as isize) as usize + new_text_len;
1388 delta +=
1389 (range.end as isize - range.start as isize) + new_text_len as isize;
1390 self.anchor_before(start)..self.anchor_after(end)
1391 })
1392 .collect(),
1393 );
1394 }
1395
1396 self.autoindent_requests.push(Arc::new(AutoindentRequest {
1397 before_edit,
1398 edited,
1399 inserted,
1400 }));
1401 }
1402
1403 self.end_transaction(cx);
1404 self.send_operation(Operation::Buffer(text::Operation::Edit(edit)), cx);
1405 }
1406
1407 fn did_edit(
1408 &mut self,
1409 old_version: &clock::Global,
1410 was_dirty: bool,
1411 cx: &mut ModelContext<Self>,
1412 ) {
1413 if self.edits_since::<usize>(old_version).next().is_none() {
1414 return;
1415 }
1416
1417 self.reparse(cx);
1418 self.update_language_server(cx);
1419
1420 cx.emit(Event::Edited);
1421 if !was_dirty {
1422 cx.emit(Event::Dirtied);
1423 }
1424 cx.notify();
1425 }
1426
1427 fn grammar(&self) -> Option<&Arc<Grammar>> {
1428 self.language.as_ref().and_then(|l| l.grammar.as_ref())
1429 }
1430
1431 pub fn apply_ops<I: IntoIterator<Item = Operation>>(
1432 &mut self,
1433 ops: I,
1434 cx: &mut ModelContext<Self>,
1435 ) -> Result<()> {
1436 self.pending_autoindent.take();
1437 let was_dirty = self.is_dirty();
1438 let old_version = self.version.clone();
1439 let mut deferred_ops = Vec::new();
1440 let buffer_ops = ops
1441 .into_iter()
1442 .filter_map(|op| match op {
1443 Operation::Buffer(op) => Some(op),
1444 _ => {
1445 if self.can_apply_op(&op) {
1446 self.apply_op(op, cx);
1447 } else {
1448 deferred_ops.push(op);
1449 }
1450 None
1451 }
1452 })
1453 .collect::<Vec<_>>();
1454 self.text.apply_ops(buffer_ops)?;
1455 self.deferred_ops.insert(deferred_ops);
1456 self.flush_deferred_ops(cx);
1457 self.did_edit(&old_version, was_dirty, cx);
1458 // Notify independently of whether the buffer was edited as the operations could include a
1459 // selection update.
1460 cx.notify();
1461 Ok(())
1462 }
1463
1464 fn flush_deferred_ops(&mut self, cx: &mut ModelContext<Self>) {
1465 let mut deferred_ops = Vec::new();
1466 for op in self.deferred_ops.drain().iter().cloned() {
1467 if self.can_apply_op(&op) {
1468 self.apply_op(op, cx);
1469 } else {
1470 deferred_ops.push(op);
1471 }
1472 }
1473 self.deferred_ops.insert(deferred_ops);
1474 }
1475
1476 fn can_apply_op(&self, operation: &Operation) -> bool {
1477 match operation {
1478 Operation::Buffer(_) => {
1479 unreachable!("buffer operations should never be applied at this layer")
1480 }
1481 Operation::UpdateDiagnostics {
1482 diagnostics: diagnostic_set,
1483 ..
1484 } => diagnostic_set.iter().all(|diagnostic| {
1485 self.text.can_resolve(&diagnostic.range.start)
1486 && self.text.can_resolve(&diagnostic.range.end)
1487 }),
1488 Operation::UpdateSelections { selections, .. } => selections
1489 .iter()
1490 .all(|s| self.can_resolve(&s.start) && self.can_resolve(&s.end)),
1491 }
1492 }
1493
1494 fn apply_op(&mut self, operation: Operation, cx: &mut ModelContext<Self>) {
1495 match operation {
1496 Operation::Buffer(_) => {
1497 unreachable!("buffer operations should never be applied at this layer")
1498 }
1499 Operation::UpdateDiagnostics {
1500 diagnostics: diagnostic_set,
1501 ..
1502 } => {
1503 let snapshot = self.snapshot();
1504 self.apply_diagnostic_update(
1505 DiagnosticSet::from_sorted_entries(diagnostic_set.iter().cloned(), &snapshot),
1506 cx,
1507 );
1508 }
1509 Operation::UpdateSelections {
1510 replica_id,
1511 selections,
1512 lamport_timestamp,
1513 } => {
1514 if let Some(set) = self.remote_selections.get(&replica_id) {
1515 if set.lamport_timestamp > lamport_timestamp {
1516 return;
1517 }
1518 }
1519
1520 self.remote_selections.insert(
1521 replica_id,
1522 SelectionSet {
1523 selections,
1524 lamport_timestamp,
1525 },
1526 );
1527 self.text.lamport_clock.observe(lamport_timestamp);
1528 self.selections_update_count += 1;
1529 }
1530 }
1531 }
1532
1533 fn apply_diagnostic_update(&mut self, diagnostics: DiagnosticSet, cx: &mut ModelContext<Self>) {
1534 self.diagnostics = diagnostics;
1535 self.diagnostics_update_count += 1;
1536 cx.notify();
1537 cx.emit(Event::DiagnosticsUpdated);
1538 }
1539
1540 #[cfg(not(test))]
1541 pub fn send_operation(&mut self, operation: Operation, cx: &mut ModelContext<Self>) {
1542 if let Some(file) = &self.file {
1543 file.buffer_updated(self.remote_id(), operation, cx.as_mut());
1544 }
1545 }
1546
1547 #[cfg(test)]
1548 pub fn send_operation(&mut self, operation: Operation, _: &mut ModelContext<Self>) {
1549 self.operations.push(operation);
1550 }
1551
1552 pub fn remove_peer(&mut self, replica_id: ReplicaId, cx: &mut ModelContext<Self>) {
1553 self.remote_selections.remove(&replica_id);
1554 cx.notify();
1555 }
1556
1557 pub fn undo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1558 let was_dirty = self.is_dirty();
1559 let old_version = self.version.clone();
1560
1561 if let Some((transaction_id, operation)) = self.text.undo() {
1562 self.send_operation(Operation::Buffer(operation), cx);
1563 self.did_edit(&old_version, was_dirty, cx);
1564 Some(transaction_id)
1565 } else {
1566 None
1567 }
1568 }
1569
1570 pub fn undo_transaction(
1571 &mut self,
1572 transaction_id: TransactionId,
1573 cx: &mut ModelContext<Self>,
1574 ) -> bool {
1575 let was_dirty = self.is_dirty();
1576 let old_version = self.version.clone();
1577
1578 if let Some(operation) = self.text.undo_transaction(transaction_id) {
1579 self.send_operation(Operation::Buffer(operation), cx);
1580 self.did_edit(&old_version, was_dirty, cx);
1581 true
1582 } else {
1583 false
1584 }
1585 }
1586
1587 pub fn redo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1588 let was_dirty = self.is_dirty();
1589 let old_version = self.version.clone();
1590
1591 if let Some((transaction_id, operation)) = self.text.redo() {
1592 self.send_operation(Operation::Buffer(operation), cx);
1593 self.did_edit(&old_version, was_dirty, cx);
1594 Some(transaction_id)
1595 } else {
1596 None
1597 }
1598 }
1599
1600 pub fn redo_transaction(
1601 &mut self,
1602 transaction_id: TransactionId,
1603 cx: &mut ModelContext<Self>,
1604 ) -> bool {
1605 let was_dirty = self.is_dirty();
1606 let old_version = self.version.clone();
1607
1608 if let Some(operation) = self.text.redo_transaction(transaction_id) {
1609 self.send_operation(Operation::Buffer(operation), cx);
1610 self.did_edit(&old_version, was_dirty, cx);
1611 true
1612 } else {
1613 false
1614 }
1615 }
1616}
1617
1618#[cfg(any(test, feature = "test-support"))]
1619impl Buffer {
1620 pub fn set_group_interval(&mut self, group_interval: Duration) {
1621 self.text.set_group_interval(group_interval);
1622 }
1623
1624 pub fn randomly_edit<T>(
1625 &mut self,
1626 rng: &mut T,
1627 old_range_count: usize,
1628 cx: &mut ModelContext<Self>,
1629 ) where
1630 T: rand::Rng,
1631 {
1632 let mut old_ranges: Vec<Range<usize>> = Vec::new();
1633 for _ in 0..old_range_count {
1634 let last_end = old_ranges.last().map_or(0, |last_range| last_range.end + 1);
1635 if last_end > self.len() {
1636 break;
1637 }
1638 old_ranges.push(self.text.random_byte_range(last_end, rng));
1639 }
1640 let new_text_len = rng.gen_range(0..10);
1641 let new_text: String = crate::random_char_iter::RandomCharIter::new(&mut *rng)
1642 .take(new_text_len)
1643 .collect();
1644 log::info!(
1645 "mutating buffer {} at {:?}: {:?}",
1646 self.replica_id(),
1647 old_ranges,
1648 new_text
1649 );
1650 self.edit(old_ranges.iter().cloned(), new_text.as_str(), cx);
1651 }
1652
1653 pub fn randomly_undo_redo(&mut self, rng: &mut impl rand::Rng, cx: &mut ModelContext<Self>) {
1654 let was_dirty = self.is_dirty();
1655 let old_version = self.version.clone();
1656
1657 let ops = self.text.randomly_undo_redo(rng);
1658 if !ops.is_empty() {
1659 for op in ops {
1660 self.send_operation(Operation::Buffer(op), cx);
1661 self.did_edit(&old_version, was_dirty, cx);
1662 }
1663 }
1664 }
1665}
1666
1667impl Entity for Buffer {
1668 type Event = Event;
1669
1670 fn release(&mut self, cx: &mut gpui::MutableAppContext) {
1671 if let Some(file) = self.file.as_ref() {
1672 file.buffer_removed(self.remote_id(), cx);
1673 }
1674 }
1675}
1676
1677impl Deref for Buffer {
1678 type Target = TextBuffer;
1679
1680 fn deref(&self) -> &Self::Target {
1681 &self.text
1682 }
1683}
1684
1685impl BufferSnapshot {
1686 fn suggest_autoindents<'a>(
1687 &'a self,
1688 row_range: Range<u32>,
1689 ) -> Option<impl Iterator<Item = IndentSuggestion> + 'a> {
1690 let mut query_cursor = QueryCursorHandle::new();
1691 if let Some((grammar, tree)) = self.grammar().zip(self.tree.as_ref()) {
1692 let prev_non_blank_row = self.prev_non_blank_row(row_range.start);
1693
1694 // Get the "indentation ranges" that intersect this row range.
1695 let indent_capture_ix = grammar.indents_query.capture_index_for_name("indent");
1696 let end_capture_ix = grammar.indents_query.capture_index_for_name("end");
1697 query_cursor.set_point_range(
1698 Point::new(prev_non_blank_row.unwrap_or(row_range.start), 0).to_ts_point()
1699 ..Point::new(row_range.end, 0).to_ts_point(),
1700 );
1701 let mut indentation_ranges = Vec::<(Range<Point>, &'static str)>::new();
1702 for mat in query_cursor.matches(
1703 &grammar.indents_query,
1704 tree.root_node(),
1705 TextProvider(self.as_rope()),
1706 ) {
1707 let mut node_kind = "";
1708 let mut start: Option<Point> = None;
1709 let mut end: Option<Point> = None;
1710 for capture in mat.captures {
1711 if Some(capture.index) == indent_capture_ix {
1712 node_kind = capture.node.kind();
1713 start.get_or_insert(Point::from_ts_point(capture.node.start_position()));
1714 end.get_or_insert(Point::from_ts_point(capture.node.end_position()));
1715 } else if Some(capture.index) == end_capture_ix {
1716 end = Some(Point::from_ts_point(capture.node.start_position().into()));
1717 }
1718 }
1719
1720 if let Some((start, end)) = start.zip(end) {
1721 if start.row == end.row {
1722 continue;
1723 }
1724
1725 let range = start..end;
1726 match indentation_ranges.binary_search_by_key(&range.start, |r| r.0.start) {
1727 Err(ix) => indentation_ranges.insert(ix, (range, node_kind)),
1728 Ok(ix) => {
1729 let prev_range = &mut indentation_ranges[ix];
1730 prev_range.0.end = prev_range.0.end.max(range.end);
1731 }
1732 }
1733 }
1734 }
1735
1736 let mut prev_row = prev_non_blank_row.unwrap_or(0);
1737 Some(row_range.map(move |row| {
1738 let row_start = Point::new(row, self.indent_column_for_line(row));
1739
1740 let mut indent_from_prev_row = false;
1741 let mut outdent_to_row = u32::MAX;
1742 for (range, _node_kind) in &indentation_ranges {
1743 if range.start.row >= row {
1744 break;
1745 }
1746
1747 if range.start.row == prev_row && range.end > row_start {
1748 indent_from_prev_row = true;
1749 }
1750 if range.end.row >= prev_row && range.end <= row_start {
1751 outdent_to_row = outdent_to_row.min(range.start.row);
1752 }
1753 }
1754
1755 let suggestion = if outdent_to_row == prev_row {
1756 IndentSuggestion {
1757 basis_row: prev_row,
1758 indent: false,
1759 }
1760 } else if indent_from_prev_row {
1761 IndentSuggestion {
1762 basis_row: prev_row,
1763 indent: true,
1764 }
1765 } else if outdent_to_row < prev_row {
1766 IndentSuggestion {
1767 basis_row: outdent_to_row,
1768 indent: false,
1769 }
1770 } else {
1771 IndentSuggestion {
1772 basis_row: prev_row,
1773 indent: false,
1774 }
1775 };
1776
1777 prev_row = row;
1778 suggestion
1779 }))
1780 } else {
1781 None
1782 }
1783 }
1784
1785 fn prev_non_blank_row(&self, mut row: u32) -> Option<u32> {
1786 while row > 0 {
1787 row -= 1;
1788 if !self.is_line_blank(row) {
1789 return Some(row);
1790 }
1791 }
1792 None
1793 }
1794
1795 pub fn chunks<'a, T: ToOffset>(
1796 &'a self,
1797 range: Range<T>,
1798 theme: Option<&'a SyntaxTheme>,
1799 ) -> BufferChunks<'a> {
1800 let range = range.start.to_offset(self)..range.end.to_offset(self);
1801
1802 let mut highlights = None;
1803 let mut diagnostic_endpoints = Vec::<DiagnosticEndpoint>::new();
1804 if let Some(theme) = theme {
1805 for entry in self.diagnostics_in_range::<_, usize>(range.clone()) {
1806 diagnostic_endpoints.push(DiagnosticEndpoint {
1807 offset: entry.range.start,
1808 is_start: true,
1809 severity: entry.diagnostic.severity,
1810 });
1811 diagnostic_endpoints.push(DiagnosticEndpoint {
1812 offset: entry.range.end,
1813 is_start: false,
1814 severity: entry.diagnostic.severity,
1815 });
1816 }
1817 diagnostic_endpoints
1818 .sort_unstable_by_key(|endpoint| (endpoint.offset, !endpoint.is_start));
1819
1820 if let Some((grammar, tree)) = self.grammar().zip(self.tree.as_ref()) {
1821 let mut query_cursor = QueryCursorHandle::new();
1822
1823 // TODO - add a Tree-sitter API to remove the need for this.
1824 let cursor = unsafe {
1825 std::mem::transmute::<_, &'static mut QueryCursor>(query_cursor.deref_mut())
1826 };
1827 let captures = cursor.set_byte_range(range.clone()).captures(
1828 &grammar.highlights_query,
1829 tree.root_node(),
1830 TextProvider(self.text.as_rope()),
1831 );
1832 highlights = Some(BufferChunkHighlights {
1833 captures,
1834 next_capture: None,
1835 stack: Default::default(),
1836 highlight_map: grammar.highlight_map(),
1837 _query_cursor: query_cursor,
1838 theme,
1839 })
1840 }
1841 }
1842
1843 let diagnostic_endpoints = diagnostic_endpoints.into_iter().peekable();
1844 let chunks = self.text.as_rope().chunks_in_range(range.clone());
1845
1846 BufferChunks {
1847 range,
1848 chunks,
1849 diagnostic_endpoints,
1850 error_depth: 0,
1851 warning_depth: 0,
1852 information_depth: 0,
1853 hint_depth: 0,
1854 highlights,
1855 }
1856 }
1857
1858 pub fn language(&self) -> Option<&Arc<Language>> {
1859 self.language.as_ref()
1860 }
1861
1862 fn grammar(&self) -> Option<&Arc<Grammar>> {
1863 self.language
1864 .as_ref()
1865 .and_then(|language| language.grammar.as_ref())
1866 }
1867
1868 pub fn range_for_syntax_ancestor<T: ToOffset>(&self, range: Range<T>) -> Option<Range<usize>> {
1869 if let Some(tree) = self.tree.as_ref() {
1870 let root = tree.root_node();
1871 let range = range.start.to_offset(self)..range.end.to_offset(self);
1872 let mut node = root.descendant_for_byte_range(range.start, range.end);
1873 while node.map_or(false, |n| n.byte_range() == range) {
1874 node = node.unwrap().parent();
1875 }
1876 node.map(|n| n.byte_range())
1877 } else {
1878 None
1879 }
1880 }
1881
1882 pub fn outline(&self, theme: Option<&SyntaxTheme>) -> Option<Outline<Anchor>> {
1883 let tree = self.tree.as_ref()?;
1884 let grammar = self
1885 .language
1886 .as_ref()
1887 .and_then(|language| language.grammar.as_ref())?;
1888
1889 let mut cursor = QueryCursorHandle::new();
1890 let matches = cursor.matches(
1891 &grammar.outline_query,
1892 tree.root_node(),
1893 TextProvider(self.as_rope()),
1894 );
1895
1896 let mut chunks = self.chunks(0..self.len(), theme);
1897
1898 let item_capture_ix = grammar.outline_query.capture_index_for_name("item")?;
1899 let name_capture_ix = grammar.outline_query.capture_index_for_name("name")?;
1900 let context_capture_ix = grammar
1901 .outline_query
1902 .capture_index_for_name("context")
1903 .unwrap_or(u32::MAX);
1904
1905 let mut stack = Vec::<Range<usize>>::new();
1906 let items = matches
1907 .filter_map(|mat| {
1908 let item_node = mat.nodes_for_capture_index(item_capture_ix).next()?;
1909 let range = item_node.start_byte()..item_node.end_byte();
1910 let mut text = String::new();
1911 let mut name_ranges = Vec::new();
1912 let mut highlight_ranges = Vec::new();
1913
1914 for capture in mat.captures {
1915 let node_is_name;
1916 if capture.index == name_capture_ix {
1917 node_is_name = true;
1918 } else if capture.index == context_capture_ix {
1919 node_is_name = false;
1920 } else {
1921 continue;
1922 }
1923
1924 let range = capture.node.start_byte()..capture.node.end_byte();
1925 if !text.is_empty() {
1926 text.push(' ');
1927 }
1928 if node_is_name {
1929 let mut start = text.len();
1930 let end = start + range.len();
1931
1932 // When multiple names are captured, then the matcheable text
1933 // includes the whitespace in between the names.
1934 if !name_ranges.is_empty() {
1935 start -= 1;
1936 }
1937
1938 name_ranges.push(start..end);
1939 }
1940
1941 let mut offset = range.start;
1942 chunks.seek(offset);
1943 while let Some(mut chunk) = chunks.next() {
1944 if chunk.text.len() > range.end - offset {
1945 chunk.text = &chunk.text[0..(range.end - offset)];
1946 offset = range.end;
1947 } else {
1948 offset += chunk.text.len();
1949 }
1950 if let Some(style) = chunk.highlight_style {
1951 let start = text.len();
1952 let end = start + chunk.text.len();
1953 highlight_ranges.push((start..end, style));
1954 }
1955 text.push_str(chunk.text);
1956 if offset >= range.end {
1957 break;
1958 }
1959 }
1960 }
1961
1962 while stack.last().map_or(false, |prev_range| {
1963 !prev_range.contains(&range.start) || !prev_range.contains(&range.end)
1964 }) {
1965 stack.pop();
1966 }
1967 stack.push(range.clone());
1968
1969 Some(OutlineItem {
1970 depth: stack.len() - 1,
1971 range: self.anchor_after(range.start)..self.anchor_before(range.end),
1972 text,
1973 highlight_ranges,
1974 name_ranges,
1975 })
1976 })
1977 .collect::<Vec<_>>();
1978
1979 if items.is_empty() {
1980 None
1981 } else {
1982 Some(Outline::new(items))
1983 }
1984 }
1985
1986 pub fn enclosing_bracket_ranges<T: ToOffset>(
1987 &self,
1988 range: Range<T>,
1989 ) -> Option<(Range<usize>, Range<usize>)> {
1990 let (grammar, tree) = self.grammar().zip(self.tree.as_ref())?;
1991 let open_capture_ix = grammar.brackets_query.capture_index_for_name("open")?;
1992 let close_capture_ix = grammar.brackets_query.capture_index_for_name("close")?;
1993
1994 // Find bracket pairs that *inclusively* contain the given range.
1995 let range = range.start.to_offset(self).saturating_sub(1)..range.end.to_offset(self) + 1;
1996 let mut cursor = QueryCursorHandle::new();
1997 let matches = cursor.set_byte_range(range).matches(
1998 &grammar.brackets_query,
1999 tree.root_node(),
2000 TextProvider(self.as_rope()),
2001 );
2002
2003 // Get the ranges of the innermost pair of brackets.
2004 matches
2005 .filter_map(|mat| {
2006 let open = mat.nodes_for_capture_index(open_capture_ix).next()?;
2007 let close = mat.nodes_for_capture_index(close_capture_ix).next()?;
2008 Some((open.byte_range(), close.byte_range()))
2009 })
2010 .min_by_key(|(open_range, close_range)| close_range.end - open_range.start)
2011 }
2012
2013 /*
2014 impl BufferSnapshot
2015 pub fn remote_selections_in_range(&self, Range<Anchor>) -> impl Iterator<Item = (ReplicaId, impl Iterator<Item = &Selection<Anchor>>)>
2016 pub fn remote_selections_in_range(&self, Range<Anchor>) -> impl Iterator<Item = (ReplicaId, i
2017 */
2018
2019 pub fn remote_selections_in_range<'a>(
2020 &'a self,
2021 range: Range<Anchor>,
2022 ) -> impl 'a + Iterator<Item = (ReplicaId, impl 'a + Iterator<Item = &'a Selection<Anchor>>)>
2023 {
2024 self.remote_selections
2025 .iter()
2026 .filter(|(replica_id, set)| {
2027 **replica_id != self.text.replica_id() && !set.selections.is_empty()
2028 })
2029 .map(move |(replica_id, set)| {
2030 let start_ix = match set.selections.binary_search_by(|probe| {
2031 probe
2032 .end
2033 .cmp(&range.start, self)
2034 .unwrap()
2035 .then(Ordering::Greater)
2036 }) {
2037 Ok(ix) | Err(ix) => ix,
2038 };
2039 let end_ix = match set.selections.binary_search_by(|probe| {
2040 probe
2041 .start
2042 .cmp(&range.end, self)
2043 .unwrap()
2044 .then(Ordering::Less)
2045 }) {
2046 Ok(ix) | Err(ix) => ix,
2047 };
2048
2049 (*replica_id, set.selections[start_ix..end_ix].iter())
2050 })
2051 }
2052
2053 pub fn diagnostics_in_range<'a, T, O>(
2054 &'a self,
2055 search_range: Range<T>,
2056 ) -> impl 'a + Iterator<Item = DiagnosticEntry<O>>
2057 where
2058 T: 'a + Clone + ToOffset,
2059 O: 'a + FromAnchor,
2060 {
2061 self.diagnostics.range(search_range.clone(), self, true)
2062 }
2063
2064 pub fn diagnostic_groups(&self) -> Vec<DiagnosticGroup<Anchor>> {
2065 let mut groups = Vec::new();
2066 self.diagnostics.groups(&mut groups, self);
2067 groups
2068 }
2069
2070 pub fn diagnostic_group<'a, O>(
2071 &'a self,
2072 group_id: usize,
2073 ) -> impl 'a + Iterator<Item = DiagnosticEntry<O>>
2074 where
2075 O: 'a + FromAnchor,
2076 {
2077 self.diagnostics.group(group_id, self)
2078 }
2079
2080 pub fn diagnostics_update_count(&self) -> usize {
2081 self.diagnostics_update_count
2082 }
2083
2084 pub fn parse_count(&self) -> usize {
2085 self.parse_count
2086 }
2087
2088 pub fn selections_update_count(&self) -> usize {
2089 self.selections_update_count
2090 }
2091}
2092
2093impl Clone for BufferSnapshot {
2094 fn clone(&self) -> Self {
2095 Self {
2096 text: self.text.clone(),
2097 tree: self.tree.clone(),
2098 remote_selections: self.remote_selections.clone(),
2099 diagnostics: self.diagnostics.clone(),
2100 selections_update_count: self.selections_update_count,
2101 diagnostics_update_count: self.diagnostics_update_count,
2102 is_parsing: self.is_parsing,
2103 language: self.language.clone(),
2104 parse_count: self.parse_count,
2105 }
2106 }
2107}
2108
2109impl Deref for BufferSnapshot {
2110 type Target = text::BufferSnapshot;
2111
2112 fn deref(&self) -> &Self::Target {
2113 &self.text
2114 }
2115}
2116
2117impl<'a> tree_sitter::TextProvider<'a> for TextProvider<'a> {
2118 type I = ByteChunks<'a>;
2119
2120 fn text(&mut self, node: tree_sitter::Node) -> Self::I {
2121 ByteChunks(self.0.chunks_in_range(node.byte_range()))
2122 }
2123}
2124
2125struct ByteChunks<'a>(rope::Chunks<'a>);
2126
2127impl<'a> Iterator for ByteChunks<'a> {
2128 type Item = &'a [u8];
2129
2130 fn next(&mut self) -> Option<Self::Item> {
2131 self.0.next().map(str::as_bytes)
2132 }
2133}
2134
2135unsafe impl<'a> Send for BufferChunks<'a> {}
2136
2137impl<'a> BufferChunks<'a> {
2138 pub fn seek(&mut self, offset: usize) {
2139 self.range.start = offset;
2140 self.chunks.seek(self.range.start);
2141 if let Some(highlights) = self.highlights.as_mut() {
2142 highlights
2143 .stack
2144 .retain(|(end_offset, _)| *end_offset > offset);
2145 if let Some((mat, capture_ix)) = &highlights.next_capture {
2146 let capture = mat.captures[*capture_ix as usize];
2147 if offset >= capture.node.start_byte() {
2148 let next_capture_end = capture.node.end_byte();
2149 if offset < next_capture_end {
2150 highlights.stack.push((
2151 next_capture_end,
2152 highlights.highlight_map.get(capture.index),
2153 ));
2154 }
2155 highlights.next_capture.take();
2156 }
2157 }
2158 highlights.captures.set_byte_range(self.range.clone());
2159 }
2160 }
2161
2162 pub fn offset(&self) -> usize {
2163 self.range.start
2164 }
2165
2166 fn update_diagnostic_depths(&mut self, endpoint: DiagnosticEndpoint) {
2167 let depth = match endpoint.severity {
2168 DiagnosticSeverity::ERROR => &mut self.error_depth,
2169 DiagnosticSeverity::WARNING => &mut self.warning_depth,
2170 DiagnosticSeverity::INFORMATION => &mut self.information_depth,
2171 DiagnosticSeverity::HINT => &mut self.hint_depth,
2172 _ => return,
2173 };
2174 if endpoint.is_start {
2175 *depth += 1;
2176 } else {
2177 *depth -= 1;
2178 }
2179 }
2180
2181 fn current_diagnostic_severity(&mut self) -> Option<DiagnosticSeverity> {
2182 if self.error_depth > 0 {
2183 Some(DiagnosticSeverity::ERROR)
2184 } else if self.warning_depth > 0 {
2185 Some(DiagnosticSeverity::WARNING)
2186 } else if self.information_depth > 0 {
2187 Some(DiagnosticSeverity::INFORMATION)
2188 } else if self.hint_depth > 0 {
2189 Some(DiagnosticSeverity::HINT)
2190 } else {
2191 None
2192 }
2193 }
2194}
2195
2196impl<'a> Iterator for BufferChunks<'a> {
2197 type Item = Chunk<'a>;
2198
2199 fn next(&mut self) -> Option<Self::Item> {
2200 let mut next_capture_start = usize::MAX;
2201 let mut next_diagnostic_endpoint = usize::MAX;
2202
2203 if let Some(highlights) = self.highlights.as_mut() {
2204 while let Some((parent_capture_end, _)) = highlights.stack.last() {
2205 if *parent_capture_end <= self.range.start {
2206 highlights.stack.pop();
2207 } else {
2208 break;
2209 }
2210 }
2211
2212 if highlights.next_capture.is_none() {
2213 highlights.next_capture = highlights.captures.next();
2214 }
2215
2216 while let Some((mat, capture_ix)) = highlights.next_capture.as_ref() {
2217 let capture = mat.captures[*capture_ix as usize];
2218 if self.range.start < capture.node.start_byte() {
2219 next_capture_start = capture.node.start_byte();
2220 break;
2221 } else {
2222 let highlight_id = highlights.highlight_map.get(capture.index);
2223 highlights
2224 .stack
2225 .push((capture.node.end_byte(), highlight_id));
2226 highlights.next_capture = highlights.captures.next();
2227 }
2228 }
2229 }
2230
2231 while let Some(endpoint) = self.diagnostic_endpoints.peek().copied() {
2232 if endpoint.offset <= self.range.start {
2233 self.update_diagnostic_depths(endpoint);
2234 self.diagnostic_endpoints.next();
2235 } else {
2236 next_diagnostic_endpoint = endpoint.offset;
2237 break;
2238 }
2239 }
2240
2241 if let Some(chunk) = self.chunks.peek() {
2242 let chunk_start = self.range.start;
2243 let mut chunk_end = (self.chunks.offset() + chunk.len())
2244 .min(next_capture_start)
2245 .min(next_diagnostic_endpoint);
2246 let mut highlight_style = None;
2247 if let Some(highlights) = self.highlights.as_ref() {
2248 if let Some((parent_capture_end, parent_highlight_id)) = highlights.stack.last() {
2249 chunk_end = chunk_end.min(*parent_capture_end);
2250 highlight_style = parent_highlight_id.style(highlights.theme);
2251 }
2252 }
2253
2254 let slice =
2255 &chunk[chunk_start - self.chunks.offset()..chunk_end - self.chunks.offset()];
2256 self.range.start = chunk_end;
2257 if self.range.start == self.chunks.offset() + chunk.len() {
2258 self.chunks.next().unwrap();
2259 }
2260
2261 Some(Chunk {
2262 text: slice,
2263 highlight_style,
2264 diagnostic: self.current_diagnostic_severity(),
2265 })
2266 } else {
2267 None
2268 }
2269 }
2270}
2271
2272impl QueryCursorHandle {
2273 pub(crate) fn new() -> Self {
2274 QueryCursorHandle(Some(
2275 QUERY_CURSORS
2276 .lock()
2277 .pop()
2278 .unwrap_or_else(|| QueryCursor::new()),
2279 ))
2280 }
2281}
2282
2283impl Deref for QueryCursorHandle {
2284 type Target = QueryCursor;
2285
2286 fn deref(&self) -> &Self::Target {
2287 self.0.as_ref().unwrap()
2288 }
2289}
2290
2291impl DerefMut for QueryCursorHandle {
2292 fn deref_mut(&mut self) -> &mut Self::Target {
2293 self.0.as_mut().unwrap()
2294 }
2295}
2296
2297impl Drop for QueryCursorHandle {
2298 fn drop(&mut self) {
2299 let mut cursor = self.0.take().unwrap();
2300 cursor.set_byte_range(0..usize::MAX);
2301 cursor.set_point_range(Point::zero().to_ts_point()..Point::MAX.to_ts_point());
2302 QUERY_CURSORS.lock().push(cursor)
2303 }
2304}
2305
2306trait ToTreeSitterPoint {
2307 fn to_ts_point(self) -> tree_sitter::Point;
2308 fn from_ts_point(point: tree_sitter::Point) -> Self;
2309}
2310
2311impl ToTreeSitterPoint for Point {
2312 fn to_ts_point(self) -> tree_sitter::Point {
2313 tree_sitter::Point::new(self.row as usize, self.column as usize)
2314 }
2315
2316 fn from_ts_point(point: tree_sitter::Point) -> Self {
2317 Point::new(point.row as u32, point.column as u32)
2318 }
2319}
2320
2321impl operation_queue::Operation for Operation {
2322 fn lamport_timestamp(&self) -> clock::Lamport {
2323 match self {
2324 Operation::Buffer(_) => {
2325 unreachable!("buffer operations should never be deferred at this layer")
2326 }
2327 Operation::UpdateDiagnostics {
2328 lamport_timestamp, ..
2329 }
2330 | Operation::UpdateSelections {
2331 lamport_timestamp, ..
2332 } => *lamport_timestamp,
2333 }
2334 }
2335}
2336
2337impl Default for Diagnostic {
2338 fn default() -> Self {
2339 Self {
2340 code: Default::default(),
2341 severity: DiagnosticSeverity::ERROR,
2342 message: Default::default(),
2343 group_id: Default::default(),
2344 is_primary: Default::default(),
2345 is_valid: true,
2346 is_disk_based: false,
2347 }
2348 }
2349}
2350
2351pub fn contiguous_ranges(
2352 values: impl Iterator<Item = u32>,
2353 max_len: usize,
2354) -> impl Iterator<Item = Range<u32>> {
2355 let mut values = values.into_iter();
2356 let mut current_range: Option<Range<u32>> = None;
2357 std::iter::from_fn(move || loop {
2358 if let Some(value) = values.next() {
2359 if let Some(range) = &mut current_range {
2360 if value == range.end && range.len() < max_len {
2361 range.end += 1;
2362 continue;
2363 }
2364 }
2365
2366 let prev_range = current_range.clone();
2367 current_range = Some(value..(value + 1));
2368 if prev_range.is_some() {
2369 return prev_range;
2370 }
2371 } else {
2372 return current_range.take();
2373 }
2374 })
2375}