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