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, ToLspPosition,
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
117#[derive(Debug)]
118pub struct Completion<T> {
119 pub old_range: Range<T>,
120 pub new_text: String,
121 pub lsp_completion: lsp::CompletionItem,
122}
123
124struct LanguageServerState {
125 server: Arc<LanguageServer>,
126 latest_snapshot: watch::Sender<Option<LanguageServerSnapshot>>,
127 pending_snapshots: BTreeMap<usize, LanguageServerSnapshot>,
128 next_version: usize,
129 _maintain_server: Task<Option<()>>,
130}
131
132#[derive(Clone)]
133struct LanguageServerSnapshot {
134 buffer_snapshot: text::BufferSnapshot,
135 version: usize,
136 path: Arc<Path>,
137}
138
139#[derive(Clone, Debug)]
140pub enum Operation {
141 Buffer(text::Operation),
142 UpdateDiagnostics {
143 diagnostics: Arc<[DiagnosticEntry<Anchor>]>,
144 lamport_timestamp: clock::Lamport,
145 },
146 UpdateSelections {
147 replica_id: ReplicaId,
148 selections: Arc<[Selection<Anchor>]>,
149 lamport_timestamp: clock::Lamport,
150 },
151}
152
153#[derive(Clone, Debug, Eq, PartialEq)]
154pub enum Event {
155 Edited,
156 Dirtied,
157 Saved,
158 FileHandleChanged,
159 Reloaded,
160 Reparsed,
161 DiagnosticsUpdated,
162 Closed,
163}
164
165pub trait File {
166 fn as_local(&self) -> Option<&dyn LocalFile>;
167
168 fn mtime(&self) -> SystemTime;
169
170 /// Returns the path of this file relative to the worktree's root directory.
171 fn path(&self) -> &Arc<Path>;
172
173 /// Returns the path of this file relative to the worktree's parent directory (this means it
174 /// includes the name of the worktree's root folder).
175 fn full_path(&self, cx: &AppContext) -> PathBuf;
176
177 /// Returns the last component of this handle's absolute path. If this handle refers to the root
178 /// of its worktree, then this method will return the name of the worktree itself.
179 fn file_name(&self, cx: &AppContext) -> OsString;
180
181 fn is_deleted(&self) -> bool;
182
183 fn save(
184 &self,
185 buffer_id: u64,
186 text: Rope,
187 version: clock::Global,
188 cx: &mut MutableAppContext,
189 ) -> Task<Result<(clock::Global, SystemTime)>>;
190
191 fn format_remote(&self, buffer_id: u64, cx: &mut MutableAppContext)
192 -> Option<Task<Result<()>>>;
193
194 fn buffer_updated(&self, buffer_id: u64, operation: Operation, cx: &mut MutableAppContext);
195
196 fn buffer_removed(&self, buffer_id: u64, cx: &mut MutableAppContext);
197
198 fn as_any(&self) -> &dyn Any;
199
200 fn to_proto(&self) -> rpc::proto::File;
201}
202
203pub trait LocalFile: File {
204 /// Returns the absolute path of this file.
205 fn abs_path(&self, cx: &AppContext) -> PathBuf;
206
207 fn load(&self, cx: &AppContext) -> Task<Result<String>>;
208
209 fn buffer_reloaded(
210 &self,
211 buffer_id: u64,
212 version: &clock::Global,
213 mtime: SystemTime,
214 cx: &mut MutableAppContext,
215 );
216}
217
218#[cfg(feature = "test-support")]
219pub struct FakeFile {
220 pub path: Arc<Path>,
221}
222
223#[cfg(feature = "test-support")]
224impl File for FakeFile {
225 fn as_local(&self) -> Option<&dyn LocalFile> {
226 Some(self)
227 }
228
229 fn mtime(&self) -> SystemTime {
230 SystemTime::UNIX_EPOCH
231 }
232
233 fn path(&self) -> &Arc<Path> {
234 &self.path
235 }
236
237 fn full_path(&self, _: &AppContext) -> PathBuf {
238 self.path.to_path_buf()
239 }
240
241 fn file_name(&self, _: &AppContext) -> OsString {
242 self.path.file_name().unwrap().to_os_string()
243 }
244
245 fn is_deleted(&self) -> bool {
246 false
247 }
248
249 fn save(
250 &self,
251 _: u64,
252 _: Rope,
253 _: clock::Global,
254 cx: &mut MutableAppContext,
255 ) -> Task<Result<(clock::Global, SystemTime)>> {
256 cx.spawn(|_| async move { Ok((Default::default(), SystemTime::UNIX_EPOCH)) })
257 }
258
259 fn format_remote(&self, _: u64, _: &mut MutableAppContext) -> Option<Task<Result<()>>> {
260 None
261 }
262
263 fn buffer_updated(&self, _: u64, _: Operation, _: &mut MutableAppContext) {}
264
265 fn buffer_removed(&self, _: u64, _: &mut MutableAppContext) {}
266
267 fn as_any(&self) -> &dyn Any {
268 self
269 }
270
271 fn to_proto(&self) -> rpc::proto::File {
272 unimplemented!()
273 }
274}
275
276#[cfg(feature = "test-support")]
277impl LocalFile for FakeFile {
278 fn abs_path(&self, _: &AppContext) -> PathBuf {
279 self.path.to_path_buf()
280 }
281
282 fn load(&self, cx: &AppContext) -> Task<Result<String>> {
283 cx.background().spawn(async move { Ok(Default::default()) })
284 }
285
286 fn buffer_reloaded(&self, _: u64, _: &clock::Global, _: SystemTime, _: &mut MutableAppContext) {
287 }
288}
289
290pub(crate) struct QueryCursorHandle(Option<QueryCursor>);
291
292#[derive(Clone)]
293struct SyntaxTree {
294 tree: Tree,
295 version: clock::Global,
296}
297
298#[derive(Clone)]
299struct AutoindentRequest {
300 before_edit: BufferSnapshot,
301 edited: Vec<Anchor>,
302 inserted: Option<Vec<Range<Anchor>>>,
303}
304
305#[derive(Debug)]
306struct IndentSuggestion {
307 basis_row: u32,
308 indent: bool,
309}
310
311struct TextProvider<'a>(&'a Rope);
312
313struct BufferChunkHighlights<'a> {
314 captures: tree_sitter::QueryCaptures<'a, 'a, TextProvider<'a>>,
315 next_capture: Option<(tree_sitter::QueryMatch<'a, 'a>, usize)>,
316 stack: Vec<(usize, HighlightId)>,
317 highlight_map: HighlightMap,
318 theme: &'a SyntaxTheme,
319 _query_cursor: QueryCursorHandle,
320}
321
322pub struct BufferChunks<'a> {
323 range: Range<usize>,
324 chunks: rope::Chunks<'a>,
325 diagnostic_endpoints: Peekable<vec::IntoIter<DiagnosticEndpoint>>,
326 error_depth: usize,
327 warning_depth: usize,
328 information_depth: usize,
329 hint_depth: usize,
330 highlights: Option<BufferChunkHighlights<'a>>,
331}
332
333#[derive(Clone, Copy, Debug, Default)]
334pub struct Chunk<'a> {
335 pub text: &'a str,
336 pub highlight_style: Option<HighlightStyle>,
337 pub diagnostic: Option<DiagnosticSeverity>,
338}
339
340pub(crate) struct Diff {
341 base_version: clock::Global,
342 new_text: Arc<str>,
343 changes: Vec<(ChangeTag, usize)>,
344}
345
346#[derive(Clone, Copy)]
347struct DiagnosticEndpoint {
348 offset: usize,
349 is_start: bool,
350 severity: DiagnosticSeverity,
351}
352
353impl Buffer {
354 pub fn new<T: Into<Arc<str>>>(
355 replica_id: ReplicaId,
356 base_text: T,
357 cx: &mut ModelContext<Self>,
358 ) -> Self {
359 Self::build(
360 TextBuffer::new(
361 replica_id,
362 cx.model_id() as u64,
363 History::new(base_text.into()),
364 ),
365 None,
366 )
367 }
368
369 pub fn from_file<T: Into<Arc<str>>>(
370 replica_id: ReplicaId,
371 base_text: T,
372 file: Box<dyn File>,
373 cx: &mut ModelContext<Self>,
374 ) -> Self {
375 Self::build(
376 TextBuffer::new(
377 replica_id,
378 cx.model_id() as u64,
379 History::new(base_text.into()),
380 ),
381 Some(file),
382 )
383 }
384
385 pub fn from_proto(
386 replica_id: ReplicaId,
387 message: proto::BufferState,
388 file: Option<Box<dyn File>>,
389 cx: &mut ModelContext<Self>,
390 ) -> Result<Self> {
391 let fragments_len = message.fragments.len();
392 let buffer = TextBuffer::from_parts(
393 replica_id,
394 message.id,
395 &message.visible_text,
396 &message.deleted_text,
397 message
398 .undo_map
399 .into_iter()
400 .map(proto::deserialize_undo_map_entry),
401 message
402 .fragments
403 .into_iter()
404 .enumerate()
405 .map(|(i, fragment)| {
406 proto::deserialize_buffer_fragment(fragment, i, fragments_len)
407 }),
408 message.lamport_timestamp,
409 From::from(message.version),
410 );
411 let mut this = Self::build(buffer, file);
412 for selection_set in message.selections {
413 this.remote_selections.insert(
414 selection_set.replica_id as ReplicaId,
415 SelectionSet {
416 selections: proto::deserialize_selections(selection_set.selections),
417 lamport_timestamp: clock::Lamport {
418 replica_id: selection_set.replica_id as ReplicaId,
419 value: selection_set.lamport_timestamp,
420 },
421 },
422 );
423 }
424 let snapshot = this.snapshot();
425 let entries = proto::deserialize_diagnostics(message.diagnostics);
426 this.apply_diagnostic_update(
427 DiagnosticSet::from_sorted_entries(entries.into_iter().cloned(), &snapshot),
428 cx,
429 );
430
431 let deferred_ops = message
432 .deferred_operations
433 .into_iter()
434 .map(proto::deserialize_operation)
435 .collect::<Result<Vec<_>>>()?;
436 this.apply_ops(deferred_ops, cx)?;
437
438 Ok(this)
439 }
440
441 pub fn to_proto(&self) -> proto::BufferState {
442 proto::BufferState {
443 id: self.remote_id(),
444 file: self.file.as_ref().map(|f| f.to_proto()),
445 visible_text: self.text.text(),
446 deleted_text: self.text.deleted_text(),
447 undo_map: self
448 .text
449 .undo_history()
450 .map(proto::serialize_undo_map_entry)
451 .collect(),
452 version: From::from(&self.version),
453 lamport_timestamp: self.lamport_clock.value,
454 fragments: self
455 .text
456 .fragments()
457 .map(proto::serialize_buffer_fragment)
458 .collect(),
459 selections: self
460 .remote_selections
461 .iter()
462 .map(|(replica_id, set)| proto::SelectionSet {
463 replica_id: *replica_id as u32,
464 selections: proto::serialize_selections(&set.selections),
465 lamport_timestamp: set.lamport_timestamp.value,
466 })
467 .collect(),
468 diagnostics: proto::serialize_diagnostics(self.diagnostics.iter()),
469 deferred_operations: self
470 .deferred_ops
471 .iter()
472 .map(proto::serialize_operation)
473 .chain(
474 self.text
475 .deferred_ops()
476 .map(|op| proto::serialize_operation(&Operation::Buffer(op.clone()))),
477 )
478 .collect(),
479 }
480 }
481
482 pub fn with_language(mut self, language: Arc<Language>, cx: &mut ModelContext<Self>) -> Self {
483 self.set_language(Some(language), cx);
484 self
485 }
486
487 pub fn with_language_server(
488 mut self,
489 server: Arc<LanguageServer>,
490 cx: &mut ModelContext<Self>,
491 ) -> Self {
492 self.set_language_server(Some(server), cx);
493 self
494 }
495
496 fn build(buffer: TextBuffer, file: Option<Box<dyn File>>) -> Self {
497 let saved_mtime;
498 if let Some(file) = file.as_ref() {
499 saved_mtime = file.mtime();
500 } else {
501 saved_mtime = UNIX_EPOCH;
502 }
503
504 Self {
505 saved_mtime,
506 saved_version: buffer.version(),
507 text: buffer,
508 file,
509 syntax_tree: Mutex::new(None),
510 parsing_in_background: false,
511 parse_count: 0,
512 sync_parse_timeout: Duration::from_millis(1),
513 autoindent_requests: Default::default(),
514 pending_autoindent: Default::default(),
515 language: None,
516 remote_selections: Default::default(),
517 selections_update_count: 0,
518 diagnostics: Default::default(),
519 diagnostics_update_count: 0,
520 language_server: None,
521 deferred_ops: OperationQueue::new(),
522 #[cfg(test)]
523 operations: Default::default(),
524 }
525 }
526
527 pub fn snapshot(&self) -> BufferSnapshot {
528 BufferSnapshot {
529 text: self.text.snapshot(),
530 tree: self.syntax_tree(),
531 remote_selections: self.remote_selections.clone(),
532 diagnostics: self.diagnostics.clone(),
533 diagnostics_update_count: self.diagnostics_update_count,
534 is_parsing: self.parsing_in_background,
535 language: self.language.clone(),
536 parse_count: self.parse_count,
537 selections_update_count: self.selections_update_count,
538 }
539 }
540
541 pub fn file(&self) -> Option<&dyn File> {
542 self.file.as_deref()
543 }
544
545 pub fn format(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
546 let file = if let Some(file) = self.file.as_ref() {
547 file
548 } else {
549 return Task::ready(Err(anyhow!("buffer has no file")));
550 };
551
552 if let Some(LanguageServerState { server, .. }) = self.language_server.as_ref() {
553 let server = server.clone();
554 let abs_path = file.as_local().unwrap().abs_path(cx);
555 let version = self.version();
556 cx.spawn(|this, mut cx| async move {
557 let edits = server
558 .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
559 text_document: lsp::TextDocumentIdentifier::new(
560 lsp::Url::from_file_path(&abs_path).unwrap(),
561 ),
562 options: Default::default(),
563 work_done_progress_params: Default::default(),
564 })
565 .await?;
566
567 if let Some(edits) = edits {
568 this.update(&mut cx, |this, cx| {
569 if this.version == version {
570 for edit in &edits {
571 let range = range_from_lsp(edit.range);
572 if this.clip_point_utf16(range.start, Bias::Left) != range.start
573 || this.clip_point_utf16(range.end, Bias::Left) != range.end
574 {
575 return Err(anyhow!(
576 "invalid formatting edits received from language server"
577 ));
578 }
579 }
580
581 for edit in edits.into_iter().rev() {
582 this.edit([range_from_lsp(edit.range)], edit.new_text, cx);
583 }
584 Ok(())
585 } else {
586 Err(anyhow!("buffer edited since starting to format"))
587 }
588 })
589 } else {
590 Ok(())
591 }
592 })
593 } else {
594 let format = file.format_remote(self.remote_id(), cx.as_mut());
595 cx.spawn(|_, _| async move {
596 if let Some(format) = format {
597 format.await?;
598 }
599 Ok(())
600 })
601 }
602 }
603
604 pub fn save(
605 &mut self,
606 cx: &mut ModelContext<Self>,
607 ) -> Task<Result<(clock::Global, SystemTime)>> {
608 let file = if let Some(file) = self.file.as_ref() {
609 file
610 } else {
611 return Task::ready(Err(anyhow!("buffer has no file")));
612 };
613 let text = self.as_rope().clone();
614 let version = self.version();
615 let save = file.save(self.remote_id(), text, version, cx.as_mut());
616 cx.spawn(|this, mut cx| async move {
617 let (version, mtime) = save.await?;
618 this.update(&mut cx, |this, cx| {
619 this.did_save(version.clone(), mtime, None, cx);
620 });
621 Ok((version, mtime))
622 })
623 }
624
625 pub fn set_language(&mut self, language: Option<Arc<Language>>, cx: &mut ModelContext<Self>) {
626 self.language = language;
627 self.reparse(cx);
628 }
629
630 pub fn set_language_server(
631 &mut self,
632 language_server: Option<Arc<lsp::LanguageServer>>,
633 cx: &mut ModelContext<Self>,
634 ) {
635 self.language_server = if let Some(server) = language_server {
636 let (latest_snapshot_tx, mut latest_snapshot_rx) = watch::channel();
637 Some(LanguageServerState {
638 latest_snapshot: latest_snapshot_tx,
639 pending_snapshots: Default::default(),
640 next_version: 0,
641 server: server.clone(),
642 _maintain_server: cx.background().spawn(
643 async move {
644 let mut prev_snapshot: Option<LanguageServerSnapshot> = None;
645 while let Some(snapshot) = latest_snapshot_rx.recv().await {
646 if let Some(snapshot) = snapshot {
647 let uri = lsp::Url::from_file_path(&snapshot.path).unwrap();
648 if let Some(prev_snapshot) = prev_snapshot {
649 let changes = lsp::DidChangeTextDocumentParams {
650 text_document: lsp::VersionedTextDocumentIdentifier::new(
651 uri,
652 snapshot.version as i32,
653 ),
654 content_changes: snapshot
655 .buffer_snapshot
656 .edits_since::<(PointUtf16, usize)>(
657 prev_snapshot.buffer_snapshot.version(),
658 )
659 .map(|edit| {
660 let edit_start = edit.new.start.0;
661 let edit_end = edit_start
662 + (edit.old.end.0 - edit.old.start.0);
663 let new_text = snapshot
664 .buffer_snapshot
665 .text_for_range(
666 edit.new.start.1..edit.new.end.1,
667 )
668 .collect();
669 lsp::TextDocumentContentChangeEvent {
670 range: Some(lsp::Range::new(
671 edit_start.to_lsp_position(),
672 edit_end.to_lsp_position(),
673 )),
674 range_length: None,
675 text: new_text,
676 }
677 })
678 .collect(),
679 };
680 server
681 .notify::<lsp::notification::DidChangeTextDocument>(changes)
682 .await?;
683 } else {
684 server
685 .notify::<lsp::notification::DidOpenTextDocument>(
686 lsp::DidOpenTextDocumentParams {
687 text_document: lsp::TextDocumentItem::new(
688 uri,
689 Default::default(),
690 snapshot.version as i32,
691 snapshot.buffer_snapshot.text().to_string(),
692 ),
693 },
694 )
695 .await?;
696 }
697
698 prev_snapshot = Some(snapshot);
699 }
700 }
701 Ok(())
702 }
703 .log_err(),
704 ),
705 })
706 } else {
707 None
708 };
709
710 self.update_language_server(cx);
711 }
712
713 pub fn did_save(
714 &mut self,
715 version: clock::Global,
716 mtime: SystemTime,
717 new_file: Option<Box<dyn File>>,
718 cx: &mut ModelContext<Self>,
719 ) {
720 self.saved_mtime = mtime;
721 self.saved_version = version;
722 if let Some(new_file) = new_file {
723 self.file = Some(new_file);
724 }
725 if let Some((state, local_file)) = &self
726 .language_server
727 .as_ref()
728 .zip(self.file.as_ref().and_then(|f| f.as_local()))
729 {
730 cx.background()
731 .spawn(
732 state
733 .server
734 .notify::<lsp::notification::DidSaveTextDocument>(
735 lsp::DidSaveTextDocumentParams {
736 text_document: lsp::TextDocumentIdentifier {
737 uri: lsp::Url::from_file_path(local_file.abs_path(cx)).unwrap(),
738 },
739 text: None,
740 },
741 ),
742 )
743 .detach()
744 }
745 cx.emit(Event::Saved);
746 }
747
748 pub fn did_reload(
749 &mut self,
750 version: clock::Global,
751 mtime: SystemTime,
752 cx: &mut ModelContext<Self>,
753 ) {
754 self.saved_mtime = mtime;
755 self.saved_version = version;
756 if let Some(file) = self.file.as_ref().and_then(|f| f.as_local()) {
757 file.buffer_reloaded(self.remote_id(), &self.saved_version, self.saved_mtime, cx);
758 }
759 cx.emit(Event::Reloaded);
760 cx.notify();
761 }
762
763 pub fn file_updated(
764 &mut self,
765 new_file: Box<dyn File>,
766 cx: &mut ModelContext<Self>,
767 ) -> Task<()> {
768 let old_file = if let Some(file) = self.file.as_ref() {
769 file
770 } else {
771 return Task::ready(());
772 };
773 let mut file_changed = false;
774 let mut task = Task::ready(());
775
776 if new_file.path() != old_file.path() {
777 file_changed = true;
778 }
779
780 if new_file.is_deleted() {
781 if !old_file.is_deleted() {
782 file_changed = true;
783 if !self.is_dirty() {
784 cx.emit(Event::Dirtied);
785 }
786 }
787 } else {
788 let new_mtime = new_file.mtime();
789 if new_mtime != old_file.mtime() {
790 file_changed = true;
791
792 if !self.is_dirty() {
793 task = cx.spawn(|this, mut cx| {
794 async move {
795 let new_text = this.read_with(&cx, |this, cx| {
796 this.file
797 .as_ref()
798 .and_then(|file| file.as_local().map(|f| f.load(cx)))
799 });
800 if let Some(new_text) = new_text {
801 let new_text = new_text.await?;
802 let diff = this
803 .read_with(&cx, |this, cx| this.diff(new_text.into(), cx))
804 .await;
805 this.update(&mut cx, |this, cx| {
806 if this.apply_diff(diff, cx) {
807 this.did_reload(this.version(), new_mtime, cx);
808 }
809 });
810 }
811 Ok(())
812 }
813 .log_err()
814 .map(drop)
815 });
816 }
817 }
818 }
819
820 if file_changed {
821 cx.emit(Event::FileHandleChanged);
822 }
823 self.file = Some(new_file);
824 task
825 }
826
827 pub fn close(&mut self, cx: &mut ModelContext<Self>) {
828 cx.emit(Event::Closed);
829 }
830
831 pub fn language(&self) -> Option<&Arc<Language>> {
832 self.language.as_ref()
833 }
834
835 pub fn language_server(&self) -> Option<&Arc<LanguageServer>> {
836 self.language_server.as_ref().map(|state| &state.server)
837 }
838
839 pub fn parse_count(&self) -> usize {
840 self.parse_count
841 }
842
843 pub fn selections_update_count(&self) -> usize {
844 self.selections_update_count
845 }
846
847 pub fn diagnostics_update_count(&self) -> usize {
848 self.diagnostics_update_count
849 }
850
851 pub(crate) fn syntax_tree(&self) -> Option<Tree> {
852 if let Some(syntax_tree) = self.syntax_tree.lock().as_mut() {
853 self.interpolate_tree(syntax_tree);
854 Some(syntax_tree.tree.clone())
855 } else {
856 None
857 }
858 }
859
860 #[cfg(any(test, feature = "test-support"))]
861 pub fn is_parsing(&self) -> bool {
862 self.parsing_in_background
863 }
864
865 #[cfg(test)]
866 pub fn set_sync_parse_timeout(&mut self, timeout: Duration) {
867 self.sync_parse_timeout = timeout;
868 }
869
870 fn reparse(&mut self, cx: &mut ModelContext<Self>) -> bool {
871 if self.parsing_in_background {
872 return false;
873 }
874
875 if let Some(grammar) = self.grammar().cloned() {
876 let old_tree = self.syntax_tree();
877 let text = self.as_rope().clone();
878 let parsed_version = self.version();
879 let parse_task = cx.background().spawn({
880 let grammar = grammar.clone();
881 async move { Self::parse_text(&text, old_tree, &grammar) }
882 });
883
884 match cx
885 .background()
886 .block_with_timeout(self.sync_parse_timeout, parse_task)
887 {
888 Ok(new_tree) => {
889 self.did_finish_parsing(new_tree, parsed_version, cx);
890 return true;
891 }
892 Err(parse_task) => {
893 self.parsing_in_background = true;
894 cx.spawn(move |this, mut cx| async move {
895 let new_tree = parse_task.await;
896 this.update(&mut cx, move |this, cx| {
897 let grammar_changed = this
898 .grammar()
899 .map_or(true, |curr_grammar| !Arc::ptr_eq(&grammar, curr_grammar));
900 let parse_again =
901 this.version.changed_since(&parsed_version) || grammar_changed;
902 this.parsing_in_background = false;
903 this.did_finish_parsing(new_tree, parsed_version, cx);
904
905 if parse_again && this.reparse(cx) {
906 return;
907 }
908 });
909 })
910 .detach();
911 }
912 }
913 }
914 false
915 }
916
917 fn parse_text(text: &Rope, old_tree: Option<Tree>, grammar: &Grammar) -> Tree {
918 PARSER.with(|parser| {
919 let mut parser = parser.borrow_mut();
920 parser
921 .set_language(grammar.ts_language)
922 .expect("incompatible grammar");
923 let mut chunks = text.chunks_in_range(0..text.len());
924 let tree = parser
925 .parse_with(
926 &mut move |offset, _| {
927 chunks.seek(offset);
928 chunks.next().unwrap_or("").as_bytes()
929 },
930 old_tree.as_ref(),
931 )
932 .unwrap();
933 tree
934 })
935 }
936
937 fn interpolate_tree(&self, tree: &mut SyntaxTree) {
938 for edit in self.edits_since::<(usize, Point)>(&tree.version) {
939 let (bytes, lines) = edit.flatten();
940 tree.tree.edit(&InputEdit {
941 start_byte: bytes.new.start,
942 old_end_byte: bytes.new.start + bytes.old.len(),
943 new_end_byte: bytes.new.end,
944 start_position: lines.new.start.to_ts_point(),
945 old_end_position: (lines.new.start + (lines.old.end - lines.old.start))
946 .to_ts_point(),
947 new_end_position: lines.new.end.to_ts_point(),
948 });
949 }
950 tree.version = self.version();
951 }
952
953 fn did_finish_parsing(
954 &mut self,
955 tree: Tree,
956 version: clock::Global,
957 cx: &mut ModelContext<Self>,
958 ) {
959 self.parse_count += 1;
960 *self.syntax_tree.lock() = Some(SyntaxTree { tree, version });
961 self.request_autoindent(cx);
962 cx.emit(Event::Reparsed);
963 cx.notify();
964 }
965
966 pub fn update_diagnostics<T>(
967 &mut self,
968 version: Option<i32>,
969 mut diagnostics: Vec<DiagnosticEntry<T>>,
970 cx: &mut ModelContext<Self>,
971 ) -> Result<()>
972 where
973 T: Copy + Ord + TextDimension + Sub<Output = T> + Clip + ToPoint,
974 {
975 fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
976 Ordering::Equal
977 .then_with(|| b.is_primary.cmp(&a.is_primary))
978 .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
979 .then_with(|| a.severity.cmp(&b.severity))
980 .then_with(|| a.message.cmp(&b.message))
981 }
982
983 let version = version.map(|version| version as usize);
984 let content =
985 if let Some((version, language_server)) = version.zip(self.language_server.as_mut()) {
986 language_server
987 .pending_snapshots
988 .retain(|&v, _| v >= version);
989 let snapshot = language_server
990 .pending_snapshots
991 .get(&version)
992 .ok_or_else(|| anyhow!("missing snapshot"))?;
993 &snapshot.buffer_snapshot
994 } else {
995 self.deref()
996 };
997
998 diagnostics.sort_unstable_by(|a, b| {
999 Ordering::Equal
1000 .then_with(|| a.range.start.cmp(&b.range.start))
1001 .then_with(|| b.range.end.cmp(&a.range.end))
1002 .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
1003 });
1004
1005 let mut sanitized_diagnostics = Vec::new();
1006 let mut edits_since_save = content.edits_since::<T>(&self.saved_version).peekable();
1007 let mut last_edit_old_end = T::default();
1008 let mut last_edit_new_end = T::default();
1009 'outer: for entry in diagnostics {
1010 let mut start = entry.range.start;
1011 let mut end = entry.range.end;
1012
1013 // Some diagnostics are based on files on disk instead of buffers'
1014 // current contents. Adjust these diagnostics' ranges to reflect
1015 // any unsaved edits.
1016 if entry.diagnostic.is_disk_based {
1017 while let Some(edit) = edits_since_save.peek() {
1018 if edit.old.end <= start {
1019 last_edit_old_end = edit.old.end;
1020 last_edit_new_end = edit.new.end;
1021 edits_since_save.next();
1022 } else if edit.old.start <= end && edit.old.end >= start {
1023 continue 'outer;
1024 } else {
1025 break;
1026 }
1027 }
1028
1029 let start_overshoot = start - last_edit_old_end;
1030 start = last_edit_new_end;
1031 start.add_assign(&start_overshoot);
1032
1033 let end_overshoot = end - last_edit_old_end;
1034 end = last_edit_new_end;
1035 end.add_assign(&end_overshoot);
1036 }
1037
1038 let range = start.clip(Bias::Left, content)..end.clip(Bias::Right, content);
1039 let mut range = range.start.to_point(content)..range.end.to_point(content);
1040 // Expand empty ranges by one character
1041 if range.start == range.end {
1042 range.end.column += 1;
1043 range.end = content.clip_point(range.end, Bias::Right);
1044 if range.start == range.end && range.end.column > 0 {
1045 range.start.column -= 1;
1046 range.start = content.clip_point(range.start, Bias::Left);
1047 }
1048 }
1049
1050 sanitized_diagnostics.push(DiagnosticEntry {
1051 range,
1052 diagnostic: entry.diagnostic,
1053 });
1054 }
1055 drop(edits_since_save);
1056
1057 let set = DiagnosticSet::new(sanitized_diagnostics, content);
1058 self.apply_diagnostic_update(set.clone(), cx);
1059
1060 let op = Operation::UpdateDiagnostics {
1061 diagnostics: set.iter().cloned().collect(),
1062 lamport_timestamp: self.text.lamport_clock.tick(),
1063 };
1064 self.send_operation(op, cx);
1065 Ok(())
1066 }
1067
1068 fn request_autoindent(&mut self, cx: &mut ModelContext<Self>) {
1069 if let Some(indent_columns) = self.compute_autoindents() {
1070 let indent_columns = cx.background().spawn(indent_columns);
1071 match cx
1072 .background()
1073 .block_with_timeout(Duration::from_micros(500), indent_columns)
1074 {
1075 Ok(indent_columns) => self.apply_autoindents(indent_columns, cx),
1076 Err(indent_columns) => {
1077 self.pending_autoindent = Some(cx.spawn(|this, mut cx| async move {
1078 let indent_columns = indent_columns.await;
1079 this.update(&mut cx, |this, cx| {
1080 this.apply_autoindents(indent_columns, cx);
1081 });
1082 }));
1083 }
1084 }
1085 }
1086 }
1087
1088 fn compute_autoindents(&self) -> Option<impl Future<Output = BTreeMap<u32, u32>>> {
1089 let max_rows_between_yields = 100;
1090 let snapshot = self.snapshot();
1091 if snapshot.language.is_none()
1092 || snapshot.tree.is_none()
1093 || self.autoindent_requests.is_empty()
1094 {
1095 return None;
1096 }
1097
1098 let autoindent_requests = self.autoindent_requests.clone();
1099 Some(async move {
1100 let mut indent_columns = BTreeMap::new();
1101 for request in autoindent_requests {
1102 let old_to_new_rows = request
1103 .edited
1104 .iter()
1105 .map(|anchor| anchor.summary::<Point>(&request.before_edit).row)
1106 .zip(
1107 request
1108 .edited
1109 .iter()
1110 .map(|anchor| anchor.summary::<Point>(&snapshot).row),
1111 )
1112 .collect::<BTreeMap<u32, u32>>();
1113
1114 let mut old_suggestions = HashMap::<u32, u32>::default();
1115 let old_edited_ranges =
1116 contiguous_ranges(old_to_new_rows.keys().copied(), max_rows_between_yields);
1117 for old_edited_range in old_edited_ranges {
1118 let suggestions = request
1119 .before_edit
1120 .suggest_autoindents(old_edited_range.clone())
1121 .into_iter()
1122 .flatten();
1123 for (old_row, suggestion) in old_edited_range.zip(suggestions) {
1124 let indentation_basis = old_to_new_rows
1125 .get(&suggestion.basis_row)
1126 .and_then(|from_row| old_suggestions.get(from_row).copied())
1127 .unwrap_or_else(|| {
1128 request
1129 .before_edit
1130 .indent_column_for_line(suggestion.basis_row)
1131 });
1132 let delta = if suggestion.indent { INDENT_SIZE } else { 0 };
1133 old_suggestions.insert(
1134 *old_to_new_rows.get(&old_row).unwrap(),
1135 indentation_basis + delta,
1136 );
1137 }
1138 yield_now().await;
1139 }
1140
1141 // At this point, old_suggestions contains the suggested indentation for all edited lines with respect to the state of the
1142 // buffer before the edit, but keyed by the row for these lines after the edits were applied.
1143 let new_edited_row_ranges =
1144 contiguous_ranges(old_to_new_rows.values().copied(), max_rows_between_yields);
1145 for new_edited_row_range in new_edited_row_ranges {
1146 let suggestions = snapshot
1147 .suggest_autoindents(new_edited_row_range.clone())
1148 .into_iter()
1149 .flatten();
1150 for (new_row, suggestion) in new_edited_row_range.zip(suggestions) {
1151 let delta = if suggestion.indent { INDENT_SIZE } else { 0 };
1152 let new_indentation = indent_columns
1153 .get(&suggestion.basis_row)
1154 .copied()
1155 .unwrap_or_else(|| {
1156 snapshot.indent_column_for_line(suggestion.basis_row)
1157 })
1158 + delta;
1159 if old_suggestions
1160 .get(&new_row)
1161 .map_or(true, |old_indentation| new_indentation != *old_indentation)
1162 {
1163 indent_columns.insert(new_row, new_indentation);
1164 }
1165 }
1166 yield_now().await;
1167 }
1168
1169 if let Some(inserted) = request.inserted.as_ref() {
1170 let inserted_row_ranges = contiguous_ranges(
1171 inserted
1172 .iter()
1173 .map(|range| range.to_point(&snapshot))
1174 .flat_map(|range| range.start.row..range.end.row + 1),
1175 max_rows_between_yields,
1176 );
1177 for inserted_row_range in inserted_row_ranges {
1178 let suggestions = snapshot
1179 .suggest_autoindents(inserted_row_range.clone())
1180 .into_iter()
1181 .flatten();
1182 for (row, suggestion) in inserted_row_range.zip(suggestions) {
1183 let delta = if suggestion.indent { INDENT_SIZE } else { 0 };
1184 let new_indentation = indent_columns
1185 .get(&suggestion.basis_row)
1186 .copied()
1187 .unwrap_or_else(|| {
1188 snapshot.indent_column_for_line(suggestion.basis_row)
1189 })
1190 + delta;
1191 indent_columns.insert(row, new_indentation);
1192 }
1193 yield_now().await;
1194 }
1195 }
1196 }
1197 indent_columns
1198 })
1199 }
1200
1201 fn apply_autoindents(
1202 &mut self,
1203 indent_columns: BTreeMap<u32, u32>,
1204 cx: &mut ModelContext<Self>,
1205 ) {
1206 self.autoindent_requests.clear();
1207 self.start_transaction();
1208 for (row, indent_column) in &indent_columns {
1209 self.set_indent_column_for_line(*row, *indent_column, cx);
1210 }
1211 self.end_transaction(cx);
1212 }
1213
1214 fn set_indent_column_for_line(&mut self, row: u32, column: u32, cx: &mut ModelContext<Self>) {
1215 let current_column = self.indent_column_for_line(row);
1216 if column > current_column {
1217 let offset = Point::new(row, 0).to_offset(&*self);
1218 self.edit(
1219 [offset..offset],
1220 " ".repeat((column - current_column) as usize),
1221 cx,
1222 );
1223 } else if column < current_column {
1224 self.edit(
1225 [Point::new(row, 0)..Point::new(row, current_column - column)],
1226 "",
1227 cx,
1228 );
1229 }
1230 }
1231
1232 pub(crate) fn diff(&self, new_text: Arc<str>, cx: &AppContext) -> Task<Diff> {
1233 // TODO: it would be nice to not allocate here.
1234 let old_text = self.text();
1235 let base_version = self.version();
1236 cx.background().spawn(async move {
1237 let changes = TextDiff::from_lines(old_text.as_str(), new_text.as_ref())
1238 .iter_all_changes()
1239 .map(|c| (c.tag(), c.value().len()))
1240 .collect::<Vec<_>>();
1241 Diff {
1242 base_version,
1243 new_text,
1244 changes,
1245 }
1246 })
1247 }
1248
1249 pub(crate) fn apply_diff(&mut self, diff: Diff, cx: &mut ModelContext<Self>) -> bool {
1250 if self.version == diff.base_version {
1251 self.start_transaction();
1252 let mut offset = 0;
1253 for (tag, len) in diff.changes {
1254 let range = offset..(offset + len);
1255 match tag {
1256 ChangeTag::Equal => offset += len,
1257 ChangeTag::Delete => self.edit(Some(range), "", cx),
1258 ChangeTag::Insert => {
1259 self.edit(Some(offset..offset), &diff.new_text[range], cx);
1260 offset += len;
1261 }
1262 }
1263 }
1264 self.end_transaction(cx);
1265 true
1266 } else {
1267 false
1268 }
1269 }
1270
1271 pub fn is_dirty(&self) -> bool {
1272 !self.saved_version.observed_all(&self.version)
1273 || self.file.as_ref().map_or(false, |file| file.is_deleted())
1274 }
1275
1276 pub fn has_conflict(&self) -> bool {
1277 !self.saved_version.observed_all(&self.version)
1278 && self
1279 .file
1280 .as_ref()
1281 .map_or(false, |file| file.mtime() > self.saved_mtime)
1282 }
1283
1284 pub fn subscribe(&mut self) -> Subscription {
1285 self.text.subscribe()
1286 }
1287
1288 pub fn start_transaction(&mut self) -> Option<TransactionId> {
1289 self.start_transaction_at(Instant::now())
1290 }
1291
1292 pub fn start_transaction_at(&mut self, now: Instant) -> Option<TransactionId> {
1293 self.text.start_transaction_at(now)
1294 }
1295
1296 pub fn end_transaction(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1297 self.end_transaction_at(Instant::now(), cx)
1298 }
1299
1300 pub fn end_transaction_at(
1301 &mut self,
1302 now: Instant,
1303 cx: &mut ModelContext<Self>,
1304 ) -> Option<TransactionId> {
1305 if let Some((transaction_id, start_version)) = self.text.end_transaction_at(now) {
1306 let was_dirty = start_version != self.saved_version;
1307 self.did_edit(&start_version, was_dirty, cx);
1308 Some(transaction_id)
1309 } else {
1310 None
1311 }
1312 }
1313
1314 pub fn avoid_grouping_next_transaction(&mut self) {
1315 self.text.avoid_grouping_next_transaction();
1316 }
1317
1318 pub fn set_active_selections(
1319 &mut self,
1320 selections: Arc<[Selection<Anchor>]>,
1321 cx: &mut ModelContext<Self>,
1322 ) {
1323 let lamport_timestamp = self.text.lamport_clock.tick();
1324 self.remote_selections.insert(
1325 self.text.replica_id(),
1326 SelectionSet {
1327 selections: selections.clone(),
1328 lamport_timestamp,
1329 },
1330 );
1331 self.send_operation(
1332 Operation::UpdateSelections {
1333 replica_id: self.text.replica_id(),
1334 selections,
1335 lamport_timestamp,
1336 },
1337 cx,
1338 );
1339 }
1340
1341 pub fn remove_active_selections(&mut self, cx: &mut ModelContext<Self>) {
1342 self.set_active_selections(Arc::from([]), cx);
1343 }
1344
1345 fn update_language_server(&mut self, cx: &AppContext) {
1346 let language_server = if let Some(language_server) = self.language_server.as_mut() {
1347 language_server
1348 } else {
1349 return;
1350 };
1351 let abs_path = self
1352 .file
1353 .as_ref()
1354 .and_then(|f| f.as_local())
1355 .map_or(Path::new("/").to_path_buf(), |file| file.abs_path(cx));
1356
1357 let version = post_inc(&mut language_server.next_version);
1358 let snapshot = LanguageServerSnapshot {
1359 buffer_snapshot: self.text.snapshot(),
1360 version,
1361 path: Arc::from(abs_path),
1362 };
1363 language_server
1364 .pending_snapshots
1365 .insert(version, snapshot.clone());
1366 let _ = language_server
1367 .latest_snapshot
1368 .blocking_send(Some(snapshot));
1369 }
1370
1371 pub fn edit<I, S, T>(&mut self, ranges_iter: I, new_text: T, cx: &mut ModelContext<Self>)
1372 where
1373 I: IntoIterator<Item = Range<S>>,
1374 S: ToOffset,
1375 T: Into<String>,
1376 {
1377 self.edit_internal(ranges_iter, new_text, false, cx)
1378 }
1379
1380 pub fn edit_with_autoindent<I, S, T>(
1381 &mut self,
1382 ranges_iter: I,
1383 new_text: T,
1384 cx: &mut ModelContext<Self>,
1385 ) where
1386 I: IntoIterator<Item = Range<S>>,
1387 S: ToOffset,
1388 T: Into<String>,
1389 {
1390 self.edit_internal(ranges_iter, new_text, true, cx)
1391 }
1392
1393 /*
1394 impl Buffer
1395 pub fn edit
1396 pub fn edit_internal
1397 pub fn edit_with_autoindent
1398 */
1399
1400 pub fn edit_internal<I, S, T>(
1401 &mut self,
1402 ranges_iter: I,
1403 new_text: T,
1404 autoindent: bool,
1405 cx: &mut ModelContext<Self>,
1406 ) where
1407 I: IntoIterator<Item = Range<S>>,
1408 S: ToOffset,
1409 T: Into<String>,
1410 {
1411 let new_text = new_text.into();
1412
1413 // Skip invalid ranges and coalesce contiguous ones.
1414 let mut ranges: Vec<Range<usize>> = Vec::new();
1415 for range in ranges_iter {
1416 let range = range.start.to_offset(self)..range.end.to_offset(self);
1417 if !new_text.is_empty() || !range.is_empty() {
1418 if let Some(prev_range) = ranges.last_mut() {
1419 if prev_range.end >= range.start {
1420 prev_range.end = cmp::max(prev_range.end, range.end);
1421 } else {
1422 ranges.push(range);
1423 }
1424 } else {
1425 ranges.push(range);
1426 }
1427 }
1428 }
1429 if ranges.is_empty() {
1430 return;
1431 }
1432
1433 self.start_transaction();
1434 self.pending_autoindent.take();
1435 let autoindent_request = if autoindent && self.language.is_some() {
1436 let before_edit = self.snapshot();
1437 let edited = ranges
1438 .iter()
1439 .filter_map(|range| {
1440 let start = range.start.to_point(self);
1441 if new_text.starts_with('\n') && start.column == self.line_len(start.row) {
1442 None
1443 } else {
1444 Some(self.anchor_before(range.start))
1445 }
1446 })
1447 .collect();
1448 Some((before_edit, edited))
1449 } else {
1450 None
1451 };
1452
1453 let first_newline_ix = new_text.find('\n');
1454 let new_text_len = new_text.len();
1455
1456 let edit = self.text.edit(ranges.iter().cloned(), new_text);
1457
1458 if let Some((before_edit, edited)) = autoindent_request {
1459 let mut inserted = None;
1460 if let Some(first_newline_ix) = first_newline_ix {
1461 let mut delta = 0isize;
1462 inserted = Some(
1463 ranges
1464 .iter()
1465 .map(|range| {
1466 let start =
1467 (delta + range.start as isize) as usize + first_newline_ix + 1;
1468 let end = (delta + range.start as isize) as usize + new_text_len;
1469 delta +=
1470 (range.end as isize - range.start as isize) + new_text_len as isize;
1471 self.anchor_before(start)..self.anchor_after(end)
1472 })
1473 .collect(),
1474 );
1475 }
1476
1477 self.autoindent_requests.push(Arc::new(AutoindentRequest {
1478 before_edit,
1479 edited,
1480 inserted,
1481 }));
1482 }
1483
1484 self.end_transaction(cx);
1485 self.send_operation(Operation::Buffer(text::Operation::Edit(edit)), cx);
1486 }
1487
1488 fn did_edit(
1489 &mut self,
1490 old_version: &clock::Global,
1491 was_dirty: bool,
1492 cx: &mut ModelContext<Self>,
1493 ) {
1494 if self.edits_since::<usize>(old_version).next().is_none() {
1495 return;
1496 }
1497
1498 self.reparse(cx);
1499 self.update_language_server(cx);
1500
1501 cx.emit(Event::Edited);
1502 if !was_dirty {
1503 cx.emit(Event::Dirtied);
1504 }
1505 cx.notify();
1506 }
1507
1508 fn grammar(&self) -> Option<&Arc<Grammar>> {
1509 self.language.as_ref().and_then(|l| l.grammar.as_ref())
1510 }
1511
1512 pub fn apply_ops<I: IntoIterator<Item = Operation>>(
1513 &mut self,
1514 ops: I,
1515 cx: &mut ModelContext<Self>,
1516 ) -> Result<()> {
1517 self.pending_autoindent.take();
1518 let was_dirty = self.is_dirty();
1519 let old_version = self.version.clone();
1520 let mut deferred_ops = Vec::new();
1521 let buffer_ops = ops
1522 .into_iter()
1523 .filter_map(|op| match op {
1524 Operation::Buffer(op) => Some(op),
1525 _ => {
1526 if self.can_apply_op(&op) {
1527 self.apply_op(op, cx);
1528 } else {
1529 deferred_ops.push(op);
1530 }
1531 None
1532 }
1533 })
1534 .collect::<Vec<_>>();
1535 self.text.apply_ops(buffer_ops)?;
1536 self.deferred_ops.insert(deferred_ops);
1537 self.flush_deferred_ops(cx);
1538 self.did_edit(&old_version, was_dirty, cx);
1539 // Notify independently of whether the buffer was edited as the operations could include a
1540 // selection update.
1541 cx.notify();
1542 Ok(())
1543 }
1544
1545 fn flush_deferred_ops(&mut self, cx: &mut ModelContext<Self>) {
1546 let mut deferred_ops = Vec::new();
1547 for op in self.deferred_ops.drain().iter().cloned() {
1548 if self.can_apply_op(&op) {
1549 self.apply_op(op, cx);
1550 } else {
1551 deferred_ops.push(op);
1552 }
1553 }
1554 self.deferred_ops.insert(deferred_ops);
1555 }
1556
1557 fn can_apply_op(&self, operation: &Operation) -> bool {
1558 match operation {
1559 Operation::Buffer(_) => {
1560 unreachable!("buffer operations should never be applied at this layer")
1561 }
1562 Operation::UpdateDiagnostics {
1563 diagnostics: diagnostic_set,
1564 ..
1565 } => diagnostic_set.iter().all(|diagnostic| {
1566 self.text.can_resolve(&diagnostic.range.start)
1567 && self.text.can_resolve(&diagnostic.range.end)
1568 }),
1569 Operation::UpdateSelections { selections, .. } => selections
1570 .iter()
1571 .all(|s| self.can_resolve(&s.start) && self.can_resolve(&s.end)),
1572 }
1573 }
1574
1575 fn apply_op(&mut self, operation: Operation, cx: &mut ModelContext<Self>) {
1576 match operation {
1577 Operation::Buffer(_) => {
1578 unreachable!("buffer operations should never be applied at this layer")
1579 }
1580 Operation::UpdateDiagnostics {
1581 diagnostics: diagnostic_set,
1582 ..
1583 } => {
1584 let snapshot = self.snapshot();
1585 self.apply_diagnostic_update(
1586 DiagnosticSet::from_sorted_entries(diagnostic_set.iter().cloned(), &snapshot),
1587 cx,
1588 );
1589 }
1590 Operation::UpdateSelections {
1591 replica_id,
1592 selections,
1593 lamport_timestamp,
1594 } => {
1595 if let Some(set) = self.remote_selections.get(&replica_id) {
1596 if set.lamport_timestamp > lamport_timestamp {
1597 return;
1598 }
1599 }
1600
1601 self.remote_selections.insert(
1602 replica_id,
1603 SelectionSet {
1604 selections,
1605 lamport_timestamp,
1606 },
1607 );
1608 self.text.lamport_clock.observe(lamport_timestamp);
1609 self.selections_update_count += 1;
1610 }
1611 }
1612 }
1613
1614 fn apply_diagnostic_update(&mut self, diagnostics: DiagnosticSet, cx: &mut ModelContext<Self>) {
1615 self.diagnostics = diagnostics;
1616 self.diagnostics_update_count += 1;
1617 cx.notify();
1618 cx.emit(Event::DiagnosticsUpdated);
1619 }
1620
1621 #[cfg(not(test))]
1622 pub fn send_operation(&mut self, operation: Operation, cx: &mut ModelContext<Self>) {
1623 if let Some(file) = &self.file {
1624 file.buffer_updated(self.remote_id(), operation, cx.as_mut());
1625 }
1626 }
1627
1628 #[cfg(test)]
1629 pub fn send_operation(&mut self, operation: Operation, _: &mut ModelContext<Self>) {
1630 self.operations.push(operation);
1631 }
1632
1633 pub fn remove_peer(&mut self, replica_id: ReplicaId, cx: &mut ModelContext<Self>) {
1634 self.remote_selections.remove(&replica_id);
1635 cx.notify();
1636 }
1637
1638 pub fn undo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1639 let was_dirty = self.is_dirty();
1640 let old_version = self.version.clone();
1641
1642 if let Some((transaction_id, operation)) = self.text.undo() {
1643 self.send_operation(Operation::Buffer(operation), cx);
1644 self.did_edit(&old_version, was_dirty, cx);
1645 Some(transaction_id)
1646 } else {
1647 None
1648 }
1649 }
1650
1651 pub fn undo_transaction(
1652 &mut self,
1653 transaction_id: TransactionId,
1654 cx: &mut ModelContext<Self>,
1655 ) -> bool {
1656 let was_dirty = self.is_dirty();
1657 let old_version = self.version.clone();
1658
1659 if let Some(operation) = self.text.undo_transaction(transaction_id) {
1660 self.send_operation(Operation::Buffer(operation), cx);
1661 self.did_edit(&old_version, was_dirty, cx);
1662 true
1663 } else {
1664 false
1665 }
1666 }
1667
1668 pub fn redo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1669 let was_dirty = self.is_dirty();
1670 let old_version = self.version.clone();
1671
1672 if let Some((transaction_id, operation)) = self.text.redo() {
1673 self.send_operation(Operation::Buffer(operation), cx);
1674 self.did_edit(&old_version, was_dirty, cx);
1675 Some(transaction_id)
1676 } else {
1677 None
1678 }
1679 }
1680
1681 pub fn redo_transaction(
1682 &mut self,
1683 transaction_id: TransactionId,
1684 cx: &mut ModelContext<Self>,
1685 ) -> bool {
1686 let was_dirty = self.is_dirty();
1687 let old_version = self.version.clone();
1688
1689 if let Some(operation) = self.text.redo_transaction(transaction_id) {
1690 self.send_operation(Operation::Buffer(operation), cx);
1691 self.did_edit(&old_version, was_dirty, cx);
1692 true
1693 } else {
1694 false
1695 }
1696 }
1697
1698 pub fn completions<T>(
1699 &self,
1700 position: T,
1701 cx: &mut ModelContext<Self>,
1702 ) -> Task<Result<Vec<Completion<Anchor>>>>
1703 where
1704 T: ToOffset,
1705 {
1706 let file = if let Some(file) = self.file.as_ref() {
1707 file
1708 } else {
1709 return Task::ready(Ok(Default::default()));
1710 };
1711
1712 if let Some(file) = file.as_local() {
1713 let server = if let Some(lang) = self.language_server.as_ref() {
1714 lang.server.clone()
1715 } else {
1716 return Task::ready(Ok(Default::default()));
1717 };
1718 let abs_path = file.abs_path(cx);
1719 let position = self.offset_to_point_utf16(position.to_offset(self));
1720
1721 cx.spawn(|this, cx| async move {
1722 let completions = server
1723 .request::<lsp::request::Completion>(lsp::CompletionParams {
1724 text_document_position: lsp::TextDocumentPositionParams::new(
1725 lsp::TextDocumentIdentifier::new(
1726 lsp::Url::from_file_path(abs_path).unwrap(),
1727 ),
1728 position.to_lsp_position(),
1729 ),
1730 context: Default::default(),
1731 work_done_progress_params: Default::default(),
1732 partial_result_params: Default::default(),
1733 })
1734 .await?;
1735
1736 let completions = if let Some(completions) = completions {
1737 match completions {
1738 lsp::CompletionResponse::Array(completions) => completions,
1739 lsp::CompletionResponse::List(list) => list.items,
1740 }
1741 } else {
1742 Default::default()
1743 };
1744
1745 this.read_with(&cx, |this, _| {
1746 Ok(completions.into_iter().filter_map(|lsp_completion| {
1747 let (old_range, new_text) = match lsp_completion.text_edit.as_ref()? {
1748 lsp::CompletionTextEdit::Edit(edit) => (range_from_lsp(edit.range), edit.new_text.clone()),
1749 lsp::CompletionTextEdit::InsertAndReplace(_) => {
1750 log::info!("received an insert and replace completion but we don't yet support that");
1751 return None
1752 },
1753 };
1754
1755 let old_range = this.anchor_before(old_range.start)..this.anchor_after(old_range.end);
1756
1757 Some(Completion {
1758 old_range,
1759 new_text,
1760 lsp_completion,
1761 })
1762 }).collect())
1763 })
1764 })
1765 } else {
1766 Task::ready(Ok(Default::default()))
1767 }
1768 }
1769}
1770
1771#[cfg(any(test, feature = "test-support"))]
1772impl Buffer {
1773 pub fn set_group_interval(&mut self, group_interval: Duration) {
1774 self.text.set_group_interval(group_interval);
1775 }
1776
1777 pub fn randomly_edit<T>(
1778 &mut self,
1779 rng: &mut T,
1780 old_range_count: usize,
1781 cx: &mut ModelContext<Self>,
1782 ) where
1783 T: rand::Rng,
1784 {
1785 let mut old_ranges: Vec<Range<usize>> = Vec::new();
1786 for _ in 0..old_range_count {
1787 let last_end = old_ranges.last().map_or(0, |last_range| last_range.end + 1);
1788 if last_end > self.len() {
1789 break;
1790 }
1791 old_ranges.push(self.text.random_byte_range(last_end, rng));
1792 }
1793 let new_text_len = rng.gen_range(0..10);
1794 let new_text: String = crate::random_char_iter::RandomCharIter::new(&mut *rng)
1795 .take(new_text_len)
1796 .collect();
1797 log::info!(
1798 "mutating buffer {} at {:?}: {:?}",
1799 self.replica_id(),
1800 old_ranges,
1801 new_text
1802 );
1803 self.edit(old_ranges.iter().cloned(), new_text.as_str(), cx);
1804 }
1805
1806 pub fn randomly_undo_redo(&mut self, rng: &mut impl rand::Rng, cx: &mut ModelContext<Self>) {
1807 let was_dirty = self.is_dirty();
1808 let old_version = self.version.clone();
1809
1810 let ops = self.text.randomly_undo_redo(rng);
1811 if !ops.is_empty() {
1812 for op in ops {
1813 self.send_operation(Operation::Buffer(op), cx);
1814 self.did_edit(&old_version, was_dirty, cx);
1815 }
1816 }
1817 }
1818}
1819
1820impl Entity for Buffer {
1821 type Event = Event;
1822
1823 fn release(&mut self, cx: &mut gpui::MutableAppContext) {
1824 if let Some(file) = self.file.as_ref() {
1825 file.buffer_removed(self.remote_id(), cx);
1826 }
1827 }
1828}
1829
1830impl Deref for Buffer {
1831 type Target = TextBuffer;
1832
1833 fn deref(&self) -> &Self::Target {
1834 &self.text
1835 }
1836}
1837
1838impl BufferSnapshot {
1839 fn suggest_autoindents<'a>(
1840 &'a self,
1841 row_range: Range<u32>,
1842 ) -> Option<impl Iterator<Item = IndentSuggestion> + 'a> {
1843 let mut query_cursor = QueryCursorHandle::new();
1844 if let Some((grammar, tree)) = self.grammar().zip(self.tree.as_ref()) {
1845 let prev_non_blank_row = self.prev_non_blank_row(row_range.start);
1846
1847 // Get the "indentation ranges" that intersect this row range.
1848 let indent_capture_ix = grammar.indents_query.capture_index_for_name("indent");
1849 let end_capture_ix = grammar.indents_query.capture_index_for_name("end");
1850 query_cursor.set_point_range(
1851 Point::new(prev_non_blank_row.unwrap_or(row_range.start), 0).to_ts_point()
1852 ..Point::new(row_range.end, 0).to_ts_point(),
1853 );
1854 let mut indentation_ranges = Vec::<(Range<Point>, &'static str)>::new();
1855 for mat in query_cursor.matches(
1856 &grammar.indents_query,
1857 tree.root_node(),
1858 TextProvider(self.as_rope()),
1859 ) {
1860 let mut node_kind = "";
1861 let mut start: Option<Point> = None;
1862 let mut end: Option<Point> = None;
1863 for capture in mat.captures {
1864 if Some(capture.index) == indent_capture_ix {
1865 node_kind = capture.node.kind();
1866 start.get_or_insert(Point::from_ts_point(capture.node.start_position()));
1867 end.get_or_insert(Point::from_ts_point(capture.node.end_position()));
1868 } else if Some(capture.index) == end_capture_ix {
1869 end = Some(Point::from_ts_point(capture.node.start_position().into()));
1870 }
1871 }
1872
1873 if let Some((start, end)) = start.zip(end) {
1874 if start.row == end.row {
1875 continue;
1876 }
1877
1878 let range = start..end;
1879 match indentation_ranges.binary_search_by_key(&range.start, |r| r.0.start) {
1880 Err(ix) => indentation_ranges.insert(ix, (range, node_kind)),
1881 Ok(ix) => {
1882 let prev_range = &mut indentation_ranges[ix];
1883 prev_range.0.end = prev_range.0.end.max(range.end);
1884 }
1885 }
1886 }
1887 }
1888
1889 let mut prev_row = prev_non_blank_row.unwrap_or(0);
1890 Some(row_range.map(move |row| {
1891 let row_start = Point::new(row, self.indent_column_for_line(row));
1892
1893 let mut indent_from_prev_row = false;
1894 let mut outdent_to_row = u32::MAX;
1895 for (range, _node_kind) in &indentation_ranges {
1896 if range.start.row >= row {
1897 break;
1898 }
1899
1900 if range.start.row == prev_row && range.end > row_start {
1901 indent_from_prev_row = true;
1902 }
1903 if range.end.row >= prev_row && range.end <= row_start {
1904 outdent_to_row = outdent_to_row.min(range.start.row);
1905 }
1906 }
1907
1908 let suggestion = if outdent_to_row == prev_row {
1909 IndentSuggestion {
1910 basis_row: prev_row,
1911 indent: false,
1912 }
1913 } else if indent_from_prev_row {
1914 IndentSuggestion {
1915 basis_row: prev_row,
1916 indent: true,
1917 }
1918 } else if outdent_to_row < prev_row {
1919 IndentSuggestion {
1920 basis_row: outdent_to_row,
1921 indent: false,
1922 }
1923 } else {
1924 IndentSuggestion {
1925 basis_row: prev_row,
1926 indent: false,
1927 }
1928 };
1929
1930 prev_row = row;
1931 suggestion
1932 }))
1933 } else {
1934 None
1935 }
1936 }
1937
1938 fn prev_non_blank_row(&self, mut row: u32) -> Option<u32> {
1939 while row > 0 {
1940 row -= 1;
1941 if !self.is_line_blank(row) {
1942 return Some(row);
1943 }
1944 }
1945 None
1946 }
1947
1948 pub fn chunks<'a, T: ToOffset>(
1949 &'a self,
1950 range: Range<T>,
1951 theme: Option<&'a SyntaxTheme>,
1952 ) -> BufferChunks<'a> {
1953 let range = range.start.to_offset(self)..range.end.to_offset(self);
1954
1955 let mut highlights = None;
1956 let mut diagnostic_endpoints = Vec::<DiagnosticEndpoint>::new();
1957 if let Some(theme) = theme {
1958 for entry in self.diagnostics_in_range::<_, usize>(range.clone()) {
1959 diagnostic_endpoints.push(DiagnosticEndpoint {
1960 offset: entry.range.start,
1961 is_start: true,
1962 severity: entry.diagnostic.severity,
1963 });
1964 diagnostic_endpoints.push(DiagnosticEndpoint {
1965 offset: entry.range.end,
1966 is_start: false,
1967 severity: entry.diagnostic.severity,
1968 });
1969 }
1970 diagnostic_endpoints
1971 .sort_unstable_by_key(|endpoint| (endpoint.offset, !endpoint.is_start));
1972
1973 if let Some((grammar, tree)) = self.grammar().zip(self.tree.as_ref()) {
1974 let mut query_cursor = QueryCursorHandle::new();
1975
1976 // TODO - add a Tree-sitter API to remove the need for this.
1977 let cursor = unsafe {
1978 std::mem::transmute::<_, &'static mut QueryCursor>(query_cursor.deref_mut())
1979 };
1980 let captures = cursor.set_byte_range(range.clone()).captures(
1981 &grammar.highlights_query,
1982 tree.root_node(),
1983 TextProvider(self.text.as_rope()),
1984 );
1985 highlights = Some(BufferChunkHighlights {
1986 captures,
1987 next_capture: None,
1988 stack: Default::default(),
1989 highlight_map: grammar.highlight_map(),
1990 _query_cursor: query_cursor,
1991 theme,
1992 })
1993 }
1994 }
1995
1996 let diagnostic_endpoints = diagnostic_endpoints.into_iter().peekable();
1997 let chunks = self.text.as_rope().chunks_in_range(range.clone());
1998
1999 BufferChunks {
2000 range,
2001 chunks,
2002 diagnostic_endpoints,
2003 error_depth: 0,
2004 warning_depth: 0,
2005 information_depth: 0,
2006 hint_depth: 0,
2007 highlights,
2008 }
2009 }
2010
2011 pub fn language(&self) -> Option<&Arc<Language>> {
2012 self.language.as_ref()
2013 }
2014
2015 fn grammar(&self) -> Option<&Arc<Grammar>> {
2016 self.language
2017 .as_ref()
2018 .and_then(|language| language.grammar.as_ref())
2019 }
2020
2021 pub fn range_for_syntax_ancestor<T: ToOffset>(&self, range: Range<T>) -> Option<Range<usize>> {
2022 if let Some(tree) = self.tree.as_ref() {
2023 let root = tree.root_node();
2024 let range = range.start.to_offset(self)..range.end.to_offset(self);
2025 let mut node = root.descendant_for_byte_range(range.start, range.end);
2026 while node.map_or(false, |n| n.byte_range() == range) {
2027 node = node.unwrap().parent();
2028 }
2029 node.map(|n| n.byte_range())
2030 } else {
2031 None
2032 }
2033 }
2034
2035 pub fn outline(&self, theme: Option<&SyntaxTheme>) -> Option<Outline<Anchor>> {
2036 let tree = self.tree.as_ref()?;
2037 let grammar = self
2038 .language
2039 .as_ref()
2040 .and_then(|language| language.grammar.as_ref())?;
2041
2042 let mut cursor = QueryCursorHandle::new();
2043 let matches = cursor.matches(
2044 &grammar.outline_query,
2045 tree.root_node(),
2046 TextProvider(self.as_rope()),
2047 );
2048
2049 let mut chunks = self.chunks(0..self.len(), theme);
2050
2051 let item_capture_ix = grammar.outline_query.capture_index_for_name("item")?;
2052 let name_capture_ix = grammar.outline_query.capture_index_for_name("name")?;
2053 let context_capture_ix = grammar
2054 .outline_query
2055 .capture_index_for_name("context")
2056 .unwrap_or(u32::MAX);
2057
2058 let mut stack = Vec::<Range<usize>>::new();
2059 let items = matches
2060 .filter_map(|mat| {
2061 let item_node = mat.nodes_for_capture_index(item_capture_ix).next()?;
2062 let range = item_node.start_byte()..item_node.end_byte();
2063 let mut text = String::new();
2064 let mut name_ranges = Vec::new();
2065 let mut highlight_ranges = Vec::new();
2066
2067 for capture in mat.captures {
2068 let node_is_name;
2069 if capture.index == name_capture_ix {
2070 node_is_name = true;
2071 } else if capture.index == context_capture_ix {
2072 node_is_name = false;
2073 } else {
2074 continue;
2075 }
2076
2077 let range = capture.node.start_byte()..capture.node.end_byte();
2078 if !text.is_empty() {
2079 text.push(' ');
2080 }
2081 if node_is_name {
2082 let mut start = text.len();
2083 let end = start + range.len();
2084
2085 // When multiple names are captured, then the matcheable text
2086 // includes the whitespace in between the names.
2087 if !name_ranges.is_empty() {
2088 start -= 1;
2089 }
2090
2091 name_ranges.push(start..end);
2092 }
2093
2094 let mut offset = range.start;
2095 chunks.seek(offset);
2096 while let Some(mut chunk) = chunks.next() {
2097 if chunk.text.len() > range.end - offset {
2098 chunk.text = &chunk.text[0..(range.end - offset)];
2099 offset = range.end;
2100 } else {
2101 offset += chunk.text.len();
2102 }
2103 if let Some(style) = chunk.highlight_style {
2104 let start = text.len();
2105 let end = start + chunk.text.len();
2106 highlight_ranges.push((start..end, style));
2107 }
2108 text.push_str(chunk.text);
2109 if offset >= range.end {
2110 break;
2111 }
2112 }
2113 }
2114
2115 while stack.last().map_or(false, |prev_range| {
2116 !prev_range.contains(&range.start) || !prev_range.contains(&range.end)
2117 }) {
2118 stack.pop();
2119 }
2120 stack.push(range.clone());
2121
2122 Some(OutlineItem {
2123 depth: stack.len() - 1,
2124 range: self.anchor_after(range.start)..self.anchor_before(range.end),
2125 text,
2126 highlight_ranges,
2127 name_ranges,
2128 })
2129 })
2130 .collect::<Vec<_>>();
2131
2132 if items.is_empty() {
2133 None
2134 } else {
2135 Some(Outline::new(items))
2136 }
2137 }
2138
2139 pub fn enclosing_bracket_ranges<T: ToOffset>(
2140 &self,
2141 range: Range<T>,
2142 ) -> Option<(Range<usize>, Range<usize>)> {
2143 let (grammar, tree) = self.grammar().zip(self.tree.as_ref())?;
2144 let open_capture_ix = grammar.brackets_query.capture_index_for_name("open")?;
2145 let close_capture_ix = grammar.brackets_query.capture_index_for_name("close")?;
2146
2147 // Find bracket pairs that *inclusively* contain the given range.
2148 let range = range.start.to_offset(self).saturating_sub(1)..range.end.to_offset(self) + 1;
2149 let mut cursor = QueryCursorHandle::new();
2150 let matches = cursor.set_byte_range(range).matches(
2151 &grammar.brackets_query,
2152 tree.root_node(),
2153 TextProvider(self.as_rope()),
2154 );
2155
2156 // Get the ranges of the innermost pair of brackets.
2157 matches
2158 .filter_map(|mat| {
2159 let open = mat.nodes_for_capture_index(open_capture_ix).next()?;
2160 let close = mat.nodes_for_capture_index(close_capture_ix).next()?;
2161 Some((open.byte_range(), close.byte_range()))
2162 })
2163 .min_by_key(|(open_range, close_range)| close_range.end - open_range.start)
2164 }
2165
2166 /*
2167 impl BufferSnapshot
2168 pub fn remote_selections_in_range(&self, Range<Anchor>) -> impl Iterator<Item = (ReplicaId, impl Iterator<Item = &Selection<Anchor>>)>
2169 pub fn remote_selections_in_range(&self, Range<Anchor>) -> impl Iterator<Item = (ReplicaId, i
2170 */
2171
2172 pub fn remote_selections_in_range<'a>(
2173 &'a self,
2174 range: Range<Anchor>,
2175 ) -> impl 'a + Iterator<Item = (ReplicaId, impl 'a + Iterator<Item = &'a Selection<Anchor>>)>
2176 {
2177 self.remote_selections
2178 .iter()
2179 .filter(|(replica_id, set)| {
2180 **replica_id != self.text.replica_id() && !set.selections.is_empty()
2181 })
2182 .map(move |(replica_id, set)| {
2183 let start_ix = match set.selections.binary_search_by(|probe| {
2184 probe
2185 .end
2186 .cmp(&range.start, self)
2187 .unwrap()
2188 .then(Ordering::Greater)
2189 }) {
2190 Ok(ix) | Err(ix) => ix,
2191 };
2192 let end_ix = match set.selections.binary_search_by(|probe| {
2193 probe
2194 .start
2195 .cmp(&range.end, self)
2196 .unwrap()
2197 .then(Ordering::Less)
2198 }) {
2199 Ok(ix) | Err(ix) => ix,
2200 };
2201
2202 (*replica_id, set.selections[start_ix..end_ix].iter())
2203 })
2204 }
2205
2206 pub fn diagnostics_in_range<'a, T, O>(
2207 &'a self,
2208 search_range: Range<T>,
2209 ) -> impl 'a + Iterator<Item = DiagnosticEntry<O>>
2210 where
2211 T: 'a + Clone + ToOffset,
2212 O: 'a + FromAnchor,
2213 {
2214 self.diagnostics.range(search_range.clone(), self, true)
2215 }
2216
2217 pub fn diagnostic_groups(&self) -> Vec<DiagnosticGroup<Anchor>> {
2218 let mut groups = Vec::new();
2219 self.diagnostics.groups(&mut groups, self);
2220 groups
2221 }
2222
2223 pub fn diagnostic_group<'a, O>(
2224 &'a self,
2225 group_id: usize,
2226 ) -> impl 'a + Iterator<Item = DiagnosticEntry<O>>
2227 where
2228 O: 'a + FromAnchor,
2229 {
2230 self.diagnostics.group(group_id, self)
2231 }
2232
2233 pub fn diagnostics_update_count(&self) -> usize {
2234 self.diagnostics_update_count
2235 }
2236
2237 pub fn parse_count(&self) -> usize {
2238 self.parse_count
2239 }
2240
2241 pub fn selections_update_count(&self) -> usize {
2242 self.selections_update_count
2243 }
2244}
2245
2246impl Clone for BufferSnapshot {
2247 fn clone(&self) -> Self {
2248 Self {
2249 text: self.text.clone(),
2250 tree: self.tree.clone(),
2251 remote_selections: self.remote_selections.clone(),
2252 diagnostics: self.diagnostics.clone(),
2253 selections_update_count: self.selections_update_count,
2254 diagnostics_update_count: self.diagnostics_update_count,
2255 is_parsing: self.is_parsing,
2256 language: self.language.clone(),
2257 parse_count: self.parse_count,
2258 }
2259 }
2260}
2261
2262impl Deref for BufferSnapshot {
2263 type Target = text::BufferSnapshot;
2264
2265 fn deref(&self) -> &Self::Target {
2266 &self.text
2267 }
2268}
2269
2270impl<'a> tree_sitter::TextProvider<'a> for TextProvider<'a> {
2271 type I = ByteChunks<'a>;
2272
2273 fn text(&mut self, node: tree_sitter::Node) -> Self::I {
2274 ByteChunks(self.0.chunks_in_range(node.byte_range()))
2275 }
2276}
2277
2278struct ByteChunks<'a>(rope::Chunks<'a>);
2279
2280impl<'a> Iterator for ByteChunks<'a> {
2281 type Item = &'a [u8];
2282
2283 fn next(&mut self) -> Option<Self::Item> {
2284 self.0.next().map(str::as_bytes)
2285 }
2286}
2287
2288unsafe impl<'a> Send for BufferChunks<'a> {}
2289
2290impl<'a> BufferChunks<'a> {
2291 pub fn seek(&mut self, offset: usize) {
2292 self.range.start = offset;
2293 self.chunks.seek(self.range.start);
2294 if let Some(highlights) = self.highlights.as_mut() {
2295 highlights
2296 .stack
2297 .retain(|(end_offset, _)| *end_offset > offset);
2298 if let Some((mat, capture_ix)) = &highlights.next_capture {
2299 let capture = mat.captures[*capture_ix as usize];
2300 if offset >= capture.node.start_byte() {
2301 let next_capture_end = capture.node.end_byte();
2302 if offset < next_capture_end {
2303 highlights.stack.push((
2304 next_capture_end,
2305 highlights.highlight_map.get(capture.index),
2306 ));
2307 }
2308 highlights.next_capture.take();
2309 }
2310 }
2311 highlights.captures.set_byte_range(self.range.clone());
2312 }
2313 }
2314
2315 pub fn offset(&self) -> usize {
2316 self.range.start
2317 }
2318
2319 fn update_diagnostic_depths(&mut self, endpoint: DiagnosticEndpoint) {
2320 let depth = match endpoint.severity {
2321 DiagnosticSeverity::ERROR => &mut self.error_depth,
2322 DiagnosticSeverity::WARNING => &mut self.warning_depth,
2323 DiagnosticSeverity::INFORMATION => &mut self.information_depth,
2324 DiagnosticSeverity::HINT => &mut self.hint_depth,
2325 _ => return,
2326 };
2327 if endpoint.is_start {
2328 *depth += 1;
2329 } else {
2330 *depth -= 1;
2331 }
2332 }
2333
2334 fn current_diagnostic_severity(&mut self) -> Option<DiagnosticSeverity> {
2335 if self.error_depth > 0 {
2336 Some(DiagnosticSeverity::ERROR)
2337 } else if self.warning_depth > 0 {
2338 Some(DiagnosticSeverity::WARNING)
2339 } else if self.information_depth > 0 {
2340 Some(DiagnosticSeverity::INFORMATION)
2341 } else if self.hint_depth > 0 {
2342 Some(DiagnosticSeverity::HINT)
2343 } else {
2344 None
2345 }
2346 }
2347}
2348
2349impl<'a> Iterator for BufferChunks<'a> {
2350 type Item = Chunk<'a>;
2351
2352 fn next(&mut self) -> Option<Self::Item> {
2353 let mut next_capture_start = usize::MAX;
2354 let mut next_diagnostic_endpoint = usize::MAX;
2355
2356 if let Some(highlights) = self.highlights.as_mut() {
2357 while let Some((parent_capture_end, _)) = highlights.stack.last() {
2358 if *parent_capture_end <= self.range.start {
2359 highlights.stack.pop();
2360 } else {
2361 break;
2362 }
2363 }
2364
2365 if highlights.next_capture.is_none() {
2366 highlights.next_capture = highlights.captures.next();
2367 }
2368
2369 while let Some((mat, capture_ix)) = highlights.next_capture.as_ref() {
2370 let capture = mat.captures[*capture_ix as usize];
2371 if self.range.start < capture.node.start_byte() {
2372 next_capture_start = capture.node.start_byte();
2373 break;
2374 } else {
2375 let highlight_id = highlights.highlight_map.get(capture.index);
2376 highlights
2377 .stack
2378 .push((capture.node.end_byte(), highlight_id));
2379 highlights.next_capture = highlights.captures.next();
2380 }
2381 }
2382 }
2383
2384 while let Some(endpoint) = self.diagnostic_endpoints.peek().copied() {
2385 if endpoint.offset <= self.range.start {
2386 self.update_diagnostic_depths(endpoint);
2387 self.diagnostic_endpoints.next();
2388 } else {
2389 next_diagnostic_endpoint = endpoint.offset;
2390 break;
2391 }
2392 }
2393
2394 if let Some(chunk) = self.chunks.peek() {
2395 let chunk_start = self.range.start;
2396 let mut chunk_end = (self.chunks.offset() + chunk.len())
2397 .min(next_capture_start)
2398 .min(next_diagnostic_endpoint);
2399 let mut highlight_style = None;
2400 if let Some(highlights) = self.highlights.as_ref() {
2401 if let Some((parent_capture_end, parent_highlight_id)) = highlights.stack.last() {
2402 chunk_end = chunk_end.min(*parent_capture_end);
2403 highlight_style = parent_highlight_id.style(highlights.theme);
2404 }
2405 }
2406
2407 let slice =
2408 &chunk[chunk_start - self.chunks.offset()..chunk_end - self.chunks.offset()];
2409 self.range.start = chunk_end;
2410 if self.range.start == self.chunks.offset() + chunk.len() {
2411 self.chunks.next().unwrap();
2412 }
2413
2414 Some(Chunk {
2415 text: slice,
2416 highlight_style,
2417 diagnostic: self.current_diagnostic_severity(),
2418 })
2419 } else {
2420 None
2421 }
2422 }
2423}
2424
2425impl QueryCursorHandle {
2426 pub(crate) fn new() -> Self {
2427 QueryCursorHandle(Some(
2428 QUERY_CURSORS
2429 .lock()
2430 .pop()
2431 .unwrap_or_else(|| QueryCursor::new()),
2432 ))
2433 }
2434}
2435
2436impl Deref for QueryCursorHandle {
2437 type Target = QueryCursor;
2438
2439 fn deref(&self) -> &Self::Target {
2440 self.0.as_ref().unwrap()
2441 }
2442}
2443
2444impl DerefMut for QueryCursorHandle {
2445 fn deref_mut(&mut self) -> &mut Self::Target {
2446 self.0.as_mut().unwrap()
2447 }
2448}
2449
2450impl Drop for QueryCursorHandle {
2451 fn drop(&mut self) {
2452 let mut cursor = self.0.take().unwrap();
2453 cursor.set_byte_range(0..usize::MAX);
2454 cursor.set_point_range(Point::zero().to_ts_point()..Point::MAX.to_ts_point());
2455 QUERY_CURSORS.lock().push(cursor)
2456 }
2457}
2458
2459trait ToTreeSitterPoint {
2460 fn to_ts_point(self) -> tree_sitter::Point;
2461 fn from_ts_point(point: tree_sitter::Point) -> Self;
2462}
2463
2464impl ToTreeSitterPoint for Point {
2465 fn to_ts_point(self) -> tree_sitter::Point {
2466 tree_sitter::Point::new(self.row as usize, self.column as usize)
2467 }
2468
2469 fn from_ts_point(point: tree_sitter::Point) -> Self {
2470 Point::new(point.row as u32, point.column as u32)
2471 }
2472}
2473
2474impl operation_queue::Operation for Operation {
2475 fn lamport_timestamp(&self) -> clock::Lamport {
2476 match self {
2477 Operation::Buffer(_) => {
2478 unreachable!("buffer operations should never be deferred at this layer")
2479 }
2480 Operation::UpdateDiagnostics {
2481 lamport_timestamp, ..
2482 }
2483 | Operation::UpdateSelections {
2484 lamport_timestamp, ..
2485 } => *lamport_timestamp,
2486 }
2487 }
2488}
2489
2490impl Default for Diagnostic {
2491 fn default() -> Self {
2492 Self {
2493 code: Default::default(),
2494 severity: DiagnosticSeverity::ERROR,
2495 message: Default::default(),
2496 group_id: Default::default(),
2497 is_primary: Default::default(),
2498 is_valid: true,
2499 is_disk_based: false,
2500 }
2501 }
2502}
2503
2504impl<T> Completion<T> {
2505 pub fn label(&self) -> &str {
2506 &self.lsp_completion.label
2507 }
2508
2509 pub fn filter_range(&self) -> Range<usize> {
2510 if let Some(filter_text) = self.lsp_completion.filter_text.as_deref() {
2511 if let Some(start) = self.label().find(filter_text) {
2512 start..start + filter_text.len()
2513 } else {
2514 0..self.label().len()
2515 }
2516 } else {
2517 0..self.label().len()
2518 }
2519 }
2520
2521 pub fn sort_key(&self) -> (usize, &str) {
2522 let kind_key = match self.lsp_completion.kind {
2523 Some(lsp::CompletionItemKind::VARIABLE) => 0,
2524 _ => 1,
2525 };
2526 (kind_key, &self.label()[self.filter_range()])
2527 }
2528}
2529
2530pub fn contiguous_ranges(
2531 values: impl Iterator<Item = u32>,
2532 max_len: usize,
2533) -> impl Iterator<Item = Range<u32>> {
2534 let mut values = values.into_iter();
2535 let mut current_range: Option<Range<u32>> = None;
2536 std::iter::from_fn(move || loop {
2537 if let Some(value) = values.next() {
2538 if let Some(range) = &mut current_range {
2539 if value == range.end && range.len() < max_len {
2540 range.end += 1;
2541 continue;
2542 }
2543 }
2544
2545 let prev_range = current_range.clone();
2546 current_range = Some(value..(value + 1));
2547 if prev_range.is_some() {
2548 return prev_range;
2549 }
2550 } else {
2551 return current_range.take();
2552 }
2553 })
2554}