1pub use crate::{
2 diagnostic_set::DiagnosticSet,
3 highlight_map::{HighlightId, HighlightMap},
4 proto, BracketPair, Grammar, Language, LanguageConfig, LanguageRegistry, PLAIN_TEXT,
5};
6use crate::{
7 diagnostic_set::{DiagnosticEntry, DiagnosticGroup},
8 language_settings::{language_settings, LanguageSettings},
9 outline::OutlineItem,
10 syntax_map::{
11 SyntaxLayerInfo, SyntaxMap, SyntaxMapCapture, SyntaxMapCaptures, SyntaxSnapshot,
12 ToTreeSitterPoint,
13 },
14 CodeLabel, LanguageScope, Outline,
15};
16use anyhow::{anyhow, Result};
17pub use clock::ReplicaId;
18use fs::LineEnding;
19use futures::FutureExt as _;
20use gpui::{fonts::HighlightStyle, AppContext, Entity, ModelContext, Task};
21use lsp::LanguageServerId;
22use parking_lot::Mutex;
23use similar::{ChangeTag, TextDiff};
24use smallvec::SmallVec;
25use smol::future::yield_now;
26use std::{
27 any::Any,
28 cmp::{self, Ordering},
29 collections::BTreeMap,
30 ffi::OsStr,
31 future::Future,
32 iter::{self, Iterator, Peekable},
33 mem,
34 ops::{Deref, Range},
35 path::{Path, PathBuf},
36 str,
37 sync::Arc,
38 time::{Duration, Instant, SystemTime, UNIX_EPOCH},
39 vec,
40};
41use sum_tree::TreeMap;
42use text::operation_queue::OperationQueue;
43pub use text::{Buffer as TextBuffer, BufferSnapshot as TextBufferSnapshot, *};
44use theme::SyntaxTheme;
45#[cfg(any(test, feature = "test-support"))]
46use util::RandomCharIter;
47use util::{RangeExt, TryFutureExt as _};
48
49#[cfg(any(test, feature = "test-support"))]
50pub use {tree_sitter_rust, tree_sitter_typescript};
51
52pub use lsp::DiagnosticSeverity;
53
54pub struct Buffer {
55 text: TextBuffer,
56 diff_base: Option<String>,
57 git_diff: git::diff::BufferDiff,
58 file: Option<Arc<dyn File>>,
59 saved_version: clock::Global,
60 saved_version_fingerprint: RopeFingerprint,
61 saved_mtime: SystemTime,
62 transaction_depth: usize,
63 was_dirty_before_starting_transaction: Option<bool>,
64 language: Option<Arc<Language>>,
65 autoindent_requests: Vec<Arc<AutoindentRequest>>,
66 pending_autoindent: Option<Task<()>>,
67 sync_parse_timeout: Duration,
68 syntax_map: Mutex<SyntaxMap>,
69 parsing_in_background: bool,
70 parse_count: usize,
71 diagnostics: SmallVec<[(LanguageServerId, DiagnosticSet); 2]>,
72 remote_selections: TreeMap<ReplicaId, SelectionSet>,
73 selections_update_count: usize,
74 diagnostics_update_count: usize,
75 diagnostics_timestamp: clock::Lamport,
76 file_update_count: usize,
77 git_diff_update_count: usize,
78 completion_triggers: Vec<String>,
79 completion_triggers_timestamp: clock::Lamport,
80 deferred_ops: OperationQueue<Operation>,
81}
82
83pub struct BufferSnapshot {
84 text: text::BufferSnapshot,
85 pub git_diff: git::diff::BufferDiff,
86 pub(crate) syntax: SyntaxSnapshot,
87 file: Option<Arc<dyn File>>,
88 diagnostics: SmallVec<[(LanguageServerId, DiagnosticSet); 2]>,
89 diagnostics_update_count: usize,
90 file_update_count: usize,
91 git_diff_update_count: usize,
92 remote_selections: TreeMap<ReplicaId, SelectionSet>,
93 selections_update_count: usize,
94 language: Option<Arc<Language>>,
95 parse_count: usize,
96}
97
98#[derive(Clone, Copy, Debug, PartialEq, Eq, Default)]
99pub struct IndentSize {
100 pub len: u32,
101 pub kind: IndentKind,
102}
103
104#[derive(Clone, Copy, Debug, PartialEq, Eq, Default)]
105pub enum IndentKind {
106 #[default]
107 Space,
108 Tab,
109}
110
111#[derive(Copy, Clone, PartialEq, Eq, Debug, Default)]
112pub enum CursorShape {
113 #[default]
114 Bar,
115 Block,
116 Underscore,
117 Hollow,
118}
119
120#[derive(Clone, Debug)]
121struct SelectionSet {
122 line_mode: bool,
123 cursor_shape: CursorShape,
124 selections: Arc<[Selection<Anchor>]>,
125 lamport_timestamp: clock::Lamport,
126}
127
128#[derive(Clone, Debug, PartialEq, Eq)]
129pub struct GroupId {
130 source: Arc<str>,
131 id: usize,
132}
133
134#[derive(Clone, Debug, PartialEq, Eq)]
135pub struct Diagnostic {
136 pub source: Option<String>,
137 pub code: Option<String>,
138 pub severity: DiagnosticSeverity,
139 pub message: String,
140 pub group_id: usize,
141 pub is_valid: bool,
142 pub is_primary: bool,
143 pub is_disk_based: bool,
144 pub is_unnecessary: bool,
145}
146
147#[derive(Clone, Debug)]
148pub struct Completion {
149 pub old_range: Range<Anchor>,
150 pub new_text: String,
151 pub label: CodeLabel,
152 pub lsp_completion: lsp::CompletionItem,
153}
154
155#[derive(Clone, Debug)]
156pub struct CodeAction {
157 pub server_id: LanguageServerId,
158 pub range: Range<Anchor>,
159 pub lsp_action: lsp::CodeAction,
160}
161
162#[derive(Clone, Debug, PartialEq, Eq)]
163pub enum Operation {
164 Buffer(text::Operation),
165
166 UpdateDiagnostics {
167 server_id: LanguageServerId,
168 diagnostics: Arc<[DiagnosticEntry<Anchor>]>,
169 lamport_timestamp: clock::Lamport,
170 },
171
172 UpdateSelections {
173 selections: Arc<[Selection<Anchor>]>,
174 lamport_timestamp: clock::Lamport,
175 line_mode: bool,
176 cursor_shape: CursorShape,
177 },
178
179 UpdateCompletionTriggers {
180 triggers: Vec<String>,
181 lamport_timestamp: clock::Lamport,
182 },
183}
184
185#[derive(Clone, Debug, PartialEq, Eq)]
186pub enum Event {
187 Operation(Operation),
188 Edited,
189 DirtyChanged,
190 Saved,
191 FileHandleChanged,
192 Reloaded,
193 DiffBaseChanged,
194 LanguageChanged,
195 Reparsed,
196 DiagnosticsUpdated,
197 Closed,
198}
199
200pub trait File: Send + Sync {
201 fn as_local(&self) -> Option<&dyn LocalFile>;
202
203 fn is_local(&self) -> bool {
204 self.as_local().is_some()
205 }
206
207 fn mtime(&self) -> SystemTime;
208
209 /// Returns the path of this file relative to the worktree's root directory.
210 fn path(&self) -> &Arc<Path>;
211
212 /// Returns the path of this file relative to the worktree's parent directory (this means it
213 /// includes the name of the worktree's root folder).
214 fn full_path(&self, cx: &AppContext) -> PathBuf;
215
216 /// Returns the last component of this handle's absolute path. If this handle refers to the root
217 /// of its worktree, then this method will return the name of the worktree itself.
218 fn file_name<'a>(&'a self, cx: &'a AppContext) -> &'a OsStr;
219
220 /// Returns the id of the worktree to which this file belongs.
221 ///
222 /// This is needed for looking up project-specific settings.
223 fn worktree_id(&self) -> usize;
224
225 fn is_deleted(&self) -> bool;
226
227 fn as_any(&self) -> &dyn Any;
228
229 fn to_proto(&self) -> rpc::proto::File;
230}
231
232pub trait LocalFile: File {
233 /// Returns the absolute path of this file.
234 fn abs_path(&self, cx: &AppContext) -> PathBuf;
235
236 fn load(&self, cx: &AppContext) -> Task<Result<String>>;
237
238 fn buffer_reloaded(
239 &self,
240 buffer_id: u64,
241 version: &clock::Global,
242 fingerprint: RopeFingerprint,
243 line_ending: LineEnding,
244 mtime: SystemTime,
245 cx: &mut AppContext,
246 );
247}
248
249#[derive(Clone, Debug)]
250pub enum AutoindentMode {
251 /// Indent each line of inserted text.
252 EachLine,
253 /// Apply the same indentation adjustment to all of the lines
254 /// in a given insertion.
255 Block {
256 /// The original indentation level of the first line of each
257 /// insertion, if it has been copied.
258 original_indent_columns: Vec<u32>,
259 },
260}
261
262#[derive(Clone)]
263struct AutoindentRequest {
264 before_edit: BufferSnapshot,
265 entries: Vec<AutoindentRequestEntry>,
266 is_block_mode: bool,
267}
268
269#[derive(Clone)]
270struct AutoindentRequestEntry {
271 /// A range of the buffer whose indentation should be adjusted.
272 range: Range<Anchor>,
273 /// Whether or not these lines should be considered brand new, for the
274 /// purpose of auto-indent. When text is not new, its indentation will
275 /// only be adjusted if the suggested indentation level has *changed*
276 /// since the edit was made.
277 first_line_is_new: bool,
278 indent_size: IndentSize,
279 original_indent_column: Option<u32>,
280}
281
282#[derive(Debug)]
283struct IndentSuggestion {
284 basis_row: u32,
285 delta: Ordering,
286 within_error: bool,
287}
288
289struct BufferChunkHighlights<'a> {
290 captures: SyntaxMapCaptures<'a>,
291 next_capture: Option<SyntaxMapCapture<'a>>,
292 stack: Vec<(usize, HighlightId)>,
293 highlight_maps: Vec<HighlightMap>,
294}
295
296pub struct BufferChunks<'a> {
297 range: Range<usize>,
298 chunks: text::Chunks<'a>,
299 diagnostic_endpoints: Peekable<vec::IntoIter<DiagnosticEndpoint>>,
300 error_depth: usize,
301 warning_depth: usize,
302 information_depth: usize,
303 hint_depth: usize,
304 unnecessary_depth: usize,
305 highlights: Option<BufferChunkHighlights<'a>>,
306}
307
308#[derive(Clone, Copy, Debug, Default)]
309pub struct Chunk<'a> {
310 pub text: &'a str,
311 pub syntax_highlight_id: Option<HighlightId>,
312 pub highlight_style: Option<HighlightStyle>,
313 pub diagnostic_severity: Option<DiagnosticSeverity>,
314 pub is_unnecessary: bool,
315 pub is_tab: bool,
316}
317
318pub struct Diff {
319 pub(crate) base_version: clock::Global,
320 line_ending: LineEnding,
321 edits: Vec<(Range<usize>, Arc<str>)>,
322}
323
324#[derive(Clone, Copy)]
325pub(crate) struct DiagnosticEndpoint {
326 offset: usize,
327 is_start: bool,
328 severity: DiagnosticSeverity,
329 is_unnecessary: bool,
330}
331
332#[derive(Copy, Clone, Eq, PartialEq, PartialOrd, Ord, Debug)]
333pub enum CharKind {
334 Punctuation,
335 Whitespace,
336 Word,
337}
338
339impl CharKind {
340 pub fn coerce_punctuation(self, treat_punctuation_as_word: bool) -> Self {
341 if treat_punctuation_as_word && self == CharKind::Punctuation {
342 CharKind::Word
343 } else {
344 self
345 }
346 }
347}
348
349impl Buffer {
350 pub fn new<T: Into<String>>(replica_id: ReplicaId, id: u64, base_text: T) -> Self {
351 Self::build(
352 TextBuffer::new(replica_id, id, base_text.into()),
353 None,
354 None,
355 )
356 }
357
358 pub fn remote(remote_id: u64, replica_id: ReplicaId, base_text: String) -> Self {
359 Self::build(
360 TextBuffer::new(replica_id, remote_id, base_text),
361 None,
362 None,
363 )
364 }
365
366 pub fn from_proto(
367 replica_id: ReplicaId,
368 message: proto::BufferState,
369 file: Option<Arc<dyn File>>,
370 ) -> Result<Self> {
371 let buffer = TextBuffer::new(replica_id, message.id, message.base_text);
372 let mut this = Self::build(
373 buffer,
374 message.diff_base.map(|text| text.into_boxed_str().into()),
375 file,
376 );
377 this.text.set_line_ending(proto::deserialize_line_ending(
378 rpc::proto::LineEnding::from_i32(message.line_ending)
379 .ok_or_else(|| anyhow!("missing line_ending"))?,
380 ));
381 this.saved_version = proto::deserialize_version(&message.saved_version);
382 this.saved_version_fingerprint =
383 proto::deserialize_fingerprint(&message.saved_version_fingerprint)?;
384 this.saved_mtime = message
385 .saved_mtime
386 .ok_or_else(|| anyhow!("invalid saved_mtime"))?
387 .into();
388 Ok(this)
389 }
390
391 pub fn to_proto(&self) -> proto::BufferState {
392 proto::BufferState {
393 id: self.remote_id(),
394 file: self.file.as_ref().map(|f| f.to_proto()),
395 base_text: self.base_text().to_string(),
396 diff_base: self.diff_base.as_ref().map(|h| h.to_string()),
397 line_ending: proto::serialize_line_ending(self.line_ending()) as i32,
398 saved_version: proto::serialize_version(&self.saved_version),
399 saved_version_fingerprint: proto::serialize_fingerprint(self.saved_version_fingerprint),
400 saved_mtime: Some(self.saved_mtime.into()),
401 }
402 }
403
404 pub fn serialize_ops(
405 &self,
406 since: Option<clock::Global>,
407 cx: &AppContext,
408 ) -> Task<Vec<proto::Operation>> {
409 let mut operations = Vec::new();
410 operations.extend(self.deferred_ops.iter().map(proto::serialize_operation));
411
412 operations.extend(self.remote_selections.iter().map(|(_, set)| {
413 proto::serialize_operation(&Operation::UpdateSelections {
414 selections: set.selections.clone(),
415 lamport_timestamp: set.lamport_timestamp,
416 line_mode: set.line_mode,
417 cursor_shape: set.cursor_shape,
418 })
419 }));
420
421 for (server_id, diagnostics) in &self.diagnostics {
422 operations.push(proto::serialize_operation(&Operation::UpdateDiagnostics {
423 lamport_timestamp: self.diagnostics_timestamp,
424 server_id: *server_id,
425 diagnostics: diagnostics.iter().cloned().collect(),
426 }));
427 }
428
429 operations.push(proto::serialize_operation(
430 &Operation::UpdateCompletionTriggers {
431 triggers: self.completion_triggers.clone(),
432 lamport_timestamp: self.completion_triggers_timestamp,
433 },
434 ));
435
436 let text_operations = self.text.operations().clone();
437 cx.background().spawn(async move {
438 let since = since.unwrap_or_default();
439 operations.extend(
440 text_operations
441 .iter()
442 .filter(|(_, op)| !since.observed(op.local_timestamp()))
443 .map(|(_, op)| proto::serialize_operation(&Operation::Buffer(op.clone()))),
444 );
445 operations.sort_unstable_by_key(proto::lamport_timestamp_for_operation);
446 operations
447 })
448 }
449
450 pub fn with_language(mut self, language: Arc<Language>, cx: &mut ModelContext<Self>) -> Self {
451 self.set_language(Some(language), cx);
452 self
453 }
454
455 pub fn build(
456 buffer: TextBuffer,
457 diff_base: Option<String>,
458 file: Option<Arc<dyn File>>,
459 ) -> Self {
460 let saved_mtime = if let Some(file) = file.as_ref() {
461 file.mtime()
462 } else {
463 UNIX_EPOCH
464 };
465
466 Self {
467 saved_mtime,
468 saved_version: buffer.version(),
469 saved_version_fingerprint: buffer.as_rope().fingerprint(),
470 transaction_depth: 0,
471 was_dirty_before_starting_transaction: None,
472 text: buffer,
473 diff_base,
474 git_diff: git::diff::BufferDiff::new(),
475 file,
476 syntax_map: Mutex::new(SyntaxMap::new()),
477 parsing_in_background: false,
478 parse_count: 0,
479 sync_parse_timeout: Duration::from_millis(1),
480 autoindent_requests: Default::default(),
481 pending_autoindent: Default::default(),
482 language: None,
483 remote_selections: Default::default(),
484 selections_update_count: 0,
485 diagnostics: Default::default(),
486 diagnostics_update_count: 0,
487 diagnostics_timestamp: Default::default(),
488 file_update_count: 0,
489 git_diff_update_count: 0,
490 completion_triggers: Default::default(),
491 completion_triggers_timestamp: Default::default(),
492 deferred_ops: OperationQueue::new(),
493 }
494 }
495
496 pub fn snapshot(&self) -> BufferSnapshot {
497 let text = self.text.snapshot();
498 let mut syntax_map = self.syntax_map.lock();
499 syntax_map.interpolate(&text);
500 let syntax = syntax_map.snapshot();
501
502 BufferSnapshot {
503 text,
504 syntax,
505 git_diff: self.git_diff.clone(),
506 file: self.file.clone(),
507 remote_selections: self.remote_selections.clone(),
508 diagnostics: self.diagnostics.clone(),
509 diagnostics_update_count: self.diagnostics_update_count,
510 file_update_count: self.file_update_count,
511 git_diff_update_count: self.git_diff_update_count,
512 language: self.language.clone(),
513 parse_count: self.parse_count,
514 selections_update_count: self.selections_update_count,
515 }
516 }
517
518 pub fn as_text_snapshot(&self) -> &text::BufferSnapshot {
519 &self.text
520 }
521
522 pub fn text_snapshot(&self) -> text::BufferSnapshot {
523 self.text.snapshot()
524 }
525
526 pub fn file(&self) -> Option<&Arc<dyn File>> {
527 self.file.as_ref()
528 }
529
530 pub fn saved_version(&self) -> &clock::Global {
531 &self.saved_version
532 }
533
534 pub fn saved_version_fingerprint(&self) -> RopeFingerprint {
535 self.saved_version_fingerprint
536 }
537
538 pub fn saved_mtime(&self) -> SystemTime {
539 self.saved_mtime
540 }
541
542 pub fn set_language(&mut self, language: Option<Arc<Language>>, cx: &mut ModelContext<Self>) {
543 self.syntax_map.lock().clear();
544 self.language = language;
545 self.reparse(cx);
546 cx.emit(Event::LanguageChanged);
547 }
548
549 pub fn set_language_registry(&mut self, language_registry: Arc<LanguageRegistry>) {
550 self.syntax_map
551 .lock()
552 .set_language_registry(language_registry);
553 }
554
555 pub fn did_save(
556 &mut self,
557 version: clock::Global,
558 fingerprint: RopeFingerprint,
559 mtime: SystemTime,
560 cx: &mut ModelContext<Self>,
561 ) {
562 self.saved_version = version;
563 self.saved_version_fingerprint = fingerprint;
564 self.saved_mtime = mtime;
565 cx.emit(Event::Saved);
566 cx.notify();
567 }
568
569 pub fn reload(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<Option<Transaction>>> {
570 cx.spawn(|this, mut cx| async move {
571 if let Some((new_mtime, new_text)) = this.read_with(&cx, |this, cx| {
572 let file = this.file.as_ref()?.as_local()?;
573 Some((file.mtime(), file.load(cx)))
574 }) {
575 let new_text = new_text.await?;
576 let diff = this
577 .read_with(&cx, |this, cx| this.diff(new_text, cx))
578 .await;
579 this.update(&mut cx, |this, cx| {
580 if this.version() == diff.base_version {
581 this.finalize_last_transaction();
582 this.apply_diff(diff, cx);
583 if let Some(transaction) = this.finalize_last_transaction().cloned() {
584 this.did_reload(
585 this.version(),
586 this.as_rope().fingerprint(),
587 this.line_ending(),
588 new_mtime,
589 cx,
590 );
591 return Ok(Some(transaction));
592 }
593 }
594 Ok(None)
595 })
596 } else {
597 Ok(None)
598 }
599 })
600 }
601
602 pub fn did_reload(
603 &mut self,
604 version: clock::Global,
605 fingerprint: RopeFingerprint,
606 line_ending: LineEnding,
607 mtime: SystemTime,
608 cx: &mut ModelContext<Self>,
609 ) {
610 self.saved_version = version;
611 self.saved_version_fingerprint = fingerprint;
612 self.text.set_line_ending(line_ending);
613 self.saved_mtime = mtime;
614 if let Some(file) = self.file.as_ref().and_then(|f| f.as_local()) {
615 file.buffer_reloaded(
616 self.remote_id(),
617 &self.saved_version,
618 self.saved_version_fingerprint,
619 self.line_ending(),
620 self.saved_mtime,
621 cx,
622 );
623 }
624 cx.emit(Event::Reloaded);
625 cx.notify();
626 }
627
628 pub fn file_updated(
629 &mut self,
630 new_file: Arc<dyn File>,
631 cx: &mut ModelContext<Self>,
632 ) -> Task<()> {
633 let mut file_changed = false;
634 let mut task = Task::ready(());
635
636 if let Some(old_file) = self.file.as_ref() {
637 if new_file.path() != old_file.path() {
638 file_changed = true;
639 }
640
641 if new_file.is_deleted() {
642 if !old_file.is_deleted() {
643 file_changed = true;
644 if !self.is_dirty() {
645 cx.emit(Event::DirtyChanged);
646 }
647 }
648 } else {
649 let new_mtime = new_file.mtime();
650 if new_mtime != old_file.mtime() {
651 file_changed = true;
652
653 if !self.is_dirty() {
654 let reload = self.reload(cx).log_err().map(drop);
655 task = cx.foreground().spawn(reload);
656 }
657 }
658 }
659 } else {
660 file_changed = true;
661 };
662
663 if file_changed {
664 self.file_update_count += 1;
665 cx.emit(Event::FileHandleChanged);
666 cx.notify();
667 }
668 self.file = Some(new_file);
669 task
670 }
671
672 pub fn diff_base(&self) -> Option<&str> {
673 self.diff_base.as_deref()
674 }
675
676 pub fn set_diff_base(&mut self, diff_base: Option<String>, cx: &mut ModelContext<Self>) {
677 self.diff_base = diff_base;
678 self.git_diff_recalc(cx);
679 cx.emit(Event::DiffBaseChanged);
680 }
681
682 pub fn git_diff_recalc(&mut self, cx: &mut ModelContext<Self>) -> Option<Task<()>> {
683 let diff_base = self.diff_base.clone()?; // TODO: Make this an Arc
684 let snapshot = self.snapshot();
685
686 let mut diff = self.git_diff.clone();
687 let diff = cx.background().spawn(async move {
688 diff.update(&diff_base, &snapshot).await;
689 diff
690 });
691
692 let handle = cx.weak_handle();
693 Some(cx.spawn_weak(|_, mut cx| async move {
694 let buffer_diff = diff.await;
695 if let Some(this) = handle.upgrade(&mut cx) {
696 this.update(&mut cx, |this, _| {
697 this.git_diff = buffer_diff;
698 this.git_diff_update_count += 1;
699 })
700 }
701 }))
702 }
703
704 pub fn close(&mut self, cx: &mut ModelContext<Self>) {
705 cx.emit(Event::Closed);
706 }
707
708 pub fn language(&self) -> Option<&Arc<Language>> {
709 self.language.as_ref()
710 }
711
712 pub fn language_at<D: ToOffset>(&self, position: D) -> Option<Arc<Language>> {
713 let offset = position.to_offset(self);
714 self.syntax_map
715 .lock()
716 .layers_for_range(offset..offset, &self.text)
717 .last()
718 .map(|info| info.language.clone())
719 .or_else(|| self.language.clone())
720 }
721
722 pub fn parse_count(&self) -> usize {
723 self.parse_count
724 }
725
726 pub fn selections_update_count(&self) -> usize {
727 self.selections_update_count
728 }
729
730 pub fn diagnostics_update_count(&self) -> usize {
731 self.diagnostics_update_count
732 }
733
734 pub fn file_update_count(&self) -> usize {
735 self.file_update_count
736 }
737
738 pub fn git_diff_update_count(&self) -> usize {
739 self.git_diff_update_count
740 }
741
742 #[cfg(any(test, feature = "test-support"))]
743 pub fn is_parsing(&self) -> bool {
744 self.parsing_in_background
745 }
746
747 pub fn contains_unknown_injections(&self) -> bool {
748 self.syntax_map.lock().contains_unknown_injections()
749 }
750
751 #[cfg(test)]
752 pub fn set_sync_parse_timeout(&mut self, timeout: Duration) {
753 self.sync_parse_timeout = timeout;
754 }
755
756 /// Called after an edit to synchronize the buffer's main parse tree with
757 /// the buffer's new underlying state.
758 ///
759 /// Locks the syntax map and interpolates the edits since the last reparse
760 /// into the foreground syntax tree.
761 ///
762 /// Then takes a stable snapshot of the syntax map before unlocking it.
763 /// The snapshot with the interpolated edits is sent to a background thread,
764 /// where we ask Tree-sitter to perform an incremental parse.
765 ///
766 /// Meanwhile, in the foreground, we block the main thread for up to 1ms
767 /// waiting on the parse to complete. As soon as it completes, we proceed
768 /// synchronously, unless a 1ms timeout elapses.
769 ///
770 /// If we time out waiting on the parse, we spawn a second task waiting
771 /// until the parse does complete and return with the interpolated tree still
772 /// in the foreground. When the background parse completes, call back into
773 /// the main thread and assign the foreground parse state.
774 ///
775 /// If the buffer or grammar changed since the start of the background parse,
776 /// initiate an additional reparse recursively. To avoid concurrent parses
777 /// for the same buffer, we only initiate a new parse if we are not already
778 /// parsing in the background.
779 pub fn reparse(&mut self, cx: &mut ModelContext<Self>) {
780 if self.parsing_in_background {
781 return;
782 }
783 let language = if let Some(language) = self.language.clone() {
784 language
785 } else {
786 return;
787 };
788
789 let text = self.text_snapshot();
790 let parsed_version = self.version();
791
792 let mut syntax_map = self.syntax_map.lock();
793 syntax_map.interpolate(&text);
794 let language_registry = syntax_map.language_registry();
795 let mut syntax_snapshot = syntax_map.snapshot();
796 drop(syntax_map);
797
798 let parse_task = cx.background().spawn({
799 let language = language.clone();
800 let language_registry = language_registry.clone();
801 async move {
802 syntax_snapshot.reparse(&text, language_registry, language);
803 syntax_snapshot
804 }
805 });
806
807 match cx
808 .background()
809 .block_with_timeout(self.sync_parse_timeout, parse_task)
810 {
811 Ok(new_syntax_snapshot) => {
812 self.did_finish_parsing(new_syntax_snapshot, cx);
813 return;
814 }
815 Err(parse_task) => {
816 self.parsing_in_background = true;
817 cx.spawn(move |this, mut cx| async move {
818 let new_syntax_map = parse_task.await;
819 this.update(&mut cx, move |this, cx| {
820 let grammar_changed =
821 this.language.as_ref().map_or(true, |current_language| {
822 !Arc::ptr_eq(&language, current_language)
823 });
824 let language_registry_changed = new_syntax_map
825 .contains_unknown_injections()
826 && language_registry.map_or(false, |registry| {
827 registry.version() != new_syntax_map.language_registry_version()
828 });
829 let parse_again = language_registry_changed
830 || grammar_changed
831 || this.version.changed_since(&parsed_version);
832 this.did_finish_parsing(new_syntax_map, cx);
833 this.parsing_in_background = false;
834 if parse_again {
835 this.reparse(cx);
836 }
837 });
838 })
839 .detach();
840 }
841 }
842 }
843
844 fn did_finish_parsing(&mut self, syntax_snapshot: SyntaxSnapshot, cx: &mut ModelContext<Self>) {
845 self.parse_count += 1;
846 self.syntax_map.lock().did_parse(syntax_snapshot);
847 self.request_autoindent(cx);
848 cx.emit(Event::Reparsed);
849 cx.notify();
850 }
851
852 pub fn update_diagnostics(
853 &mut self,
854 server_id: LanguageServerId,
855 diagnostics: DiagnosticSet,
856 cx: &mut ModelContext<Self>,
857 ) {
858 let lamport_timestamp = self.text.lamport_clock.tick();
859 let op = Operation::UpdateDiagnostics {
860 server_id,
861 diagnostics: diagnostics.iter().cloned().collect(),
862 lamport_timestamp,
863 };
864 self.apply_diagnostic_update(server_id, diagnostics, lamport_timestamp, cx);
865 self.send_operation(op, cx);
866 }
867
868 fn request_autoindent(&mut self, cx: &mut ModelContext<Self>) {
869 if let Some(indent_sizes) = self.compute_autoindents() {
870 let indent_sizes = cx.background().spawn(indent_sizes);
871 match cx
872 .background()
873 .block_with_timeout(Duration::from_micros(500), indent_sizes)
874 {
875 Ok(indent_sizes) => self.apply_autoindents(indent_sizes, cx),
876 Err(indent_sizes) => {
877 self.pending_autoindent = Some(cx.spawn(|this, mut cx| async move {
878 let indent_sizes = indent_sizes.await;
879 this.update(&mut cx, |this, cx| {
880 this.apply_autoindents(indent_sizes, cx);
881 });
882 }));
883 }
884 }
885 } else {
886 self.autoindent_requests.clear();
887 }
888 }
889
890 fn compute_autoindents(&self) -> Option<impl Future<Output = BTreeMap<u32, IndentSize>>> {
891 let max_rows_between_yields = 100;
892 let snapshot = self.snapshot();
893 if snapshot.syntax.is_empty() || self.autoindent_requests.is_empty() {
894 return None;
895 }
896
897 let autoindent_requests = self.autoindent_requests.clone();
898 Some(async move {
899 let mut indent_sizes = BTreeMap::new();
900 for request in autoindent_requests {
901 // Resolve each edited range to its row in the current buffer and in the
902 // buffer before this batch of edits.
903 let mut row_ranges = Vec::new();
904 let mut old_to_new_rows = BTreeMap::new();
905 let mut language_indent_sizes_by_new_row = Vec::new();
906 for entry in &request.entries {
907 let position = entry.range.start;
908 let new_row = position.to_point(&snapshot).row;
909 let new_end_row = entry.range.end.to_point(&snapshot).row + 1;
910 language_indent_sizes_by_new_row.push((new_row, entry.indent_size));
911
912 if !entry.first_line_is_new {
913 let old_row = position.to_point(&request.before_edit).row;
914 old_to_new_rows.insert(old_row, new_row);
915 }
916 row_ranges.push((new_row..new_end_row, entry.original_indent_column));
917 }
918
919 // Build a map containing the suggested indentation for each of the edited lines
920 // with respect to the state of the buffer before these edits. This map is keyed
921 // by the rows for these lines in the current state of the buffer.
922 let mut old_suggestions = BTreeMap::<u32, (IndentSize, bool)>::default();
923 let old_edited_ranges =
924 contiguous_ranges(old_to_new_rows.keys().copied(), max_rows_between_yields);
925 let mut language_indent_sizes = language_indent_sizes_by_new_row.iter().peekable();
926 let mut language_indent_size = IndentSize::default();
927 for old_edited_range in old_edited_ranges {
928 let suggestions = request
929 .before_edit
930 .suggest_autoindents(old_edited_range.clone())
931 .into_iter()
932 .flatten();
933 for (old_row, suggestion) in old_edited_range.zip(suggestions) {
934 if let Some(suggestion) = suggestion {
935 let new_row = *old_to_new_rows.get(&old_row).unwrap();
936
937 // Find the indent size based on the language for this row.
938 while let Some((row, size)) = language_indent_sizes.peek() {
939 if *row > new_row {
940 break;
941 }
942 language_indent_size = *size;
943 language_indent_sizes.next();
944 }
945
946 let suggested_indent = old_to_new_rows
947 .get(&suggestion.basis_row)
948 .and_then(|from_row| {
949 Some(old_suggestions.get(from_row).copied()?.0)
950 })
951 .unwrap_or_else(|| {
952 request
953 .before_edit
954 .indent_size_for_line(suggestion.basis_row)
955 })
956 .with_delta(suggestion.delta, language_indent_size);
957 old_suggestions
958 .insert(new_row, (suggested_indent, suggestion.within_error));
959 }
960 }
961 yield_now().await;
962 }
963
964 // In block mode, only compute indentation suggestions for the first line
965 // of each insertion. Otherwise, compute suggestions for every inserted line.
966 let new_edited_row_ranges = contiguous_ranges(
967 row_ranges.iter().flat_map(|(range, _)| {
968 if request.is_block_mode {
969 range.start..range.start + 1
970 } else {
971 range.clone()
972 }
973 }),
974 max_rows_between_yields,
975 );
976
977 // Compute new suggestions for each line, but only include them in the result
978 // if they differ from the old suggestion for that line.
979 let mut language_indent_sizes = language_indent_sizes_by_new_row.iter().peekable();
980 let mut language_indent_size = IndentSize::default();
981 for new_edited_row_range in new_edited_row_ranges {
982 let suggestions = snapshot
983 .suggest_autoindents(new_edited_row_range.clone())
984 .into_iter()
985 .flatten();
986 for (new_row, suggestion) in new_edited_row_range.zip(suggestions) {
987 if let Some(suggestion) = suggestion {
988 // Find the indent size based on the language for this row.
989 while let Some((row, size)) = language_indent_sizes.peek() {
990 if *row > new_row {
991 break;
992 }
993 language_indent_size = *size;
994 language_indent_sizes.next();
995 }
996
997 let suggested_indent = indent_sizes
998 .get(&suggestion.basis_row)
999 .copied()
1000 .unwrap_or_else(|| {
1001 snapshot.indent_size_for_line(suggestion.basis_row)
1002 })
1003 .with_delta(suggestion.delta, language_indent_size);
1004 if old_suggestions.get(&new_row).map_or(
1005 true,
1006 |(old_indentation, was_within_error)| {
1007 suggested_indent != *old_indentation
1008 && (!suggestion.within_error || *was_within_error)
1009 },
1010 ) {
1011 indent_sizes.insert(new_row, suggested_indent);
1012 }
1013 }
1014 }
1015 yield_now().await;
1016 }
1017
1018 // For each block of inserted text, adjust the indentation of the remaining
1019 // lines of the block by the same amount as the first line was adjusted.
1020 if request.is_block_mode {
1021 for (row_range, original_indent_column) in
1022 row_ranges
1023 .into_iter()
1024 .filter_map(|(range, original_indent_column)| {
1025 if range.len() > 1 {
1026 Some((range, original_indent_column?))
1027 } else {
1028 None
1029 }
1030 })
1031 {
1032 let new_indent = indent_sizes
1033 .get(&row_range.start)
1034 .copied()
1035 .unwrap_or_else(|| snapshot.indent_size_for_line(row_range.start));
1036 let delta = new_indent.len as i64 - original_indent_column as i64;
1037 if delta != 0 {
1038 for row in row_range.skip(1) {
1039 indent_sizes.entry(row).or_insert_with(|| {
1040 let mut size = snapshot.indent_size_for_line(row);
1041 if size.kind == new_indent.kind {
1042 match delta.cmp(&0) {
1043 Ordering::Greater => size.len += delta as u32,
1044 Ordering::Less => {
1045 size.len = size.len.saturating_sub(-delta as u32)
1046 }
1047 Ordering::Equal => {}
1048 }
1049 }
1050 size
1051 });
1052 }
1053 }
1054 }
1055 }
1056 }
1057
1058 indent_sizes
1059 })
1060 }
1061
1062 fn apply_autoindents(
1063 &mut self,
1064 indent_sizes: BTreeMap<u32, IndentSize>,
1065 cx: &mut ModelContext<Self>,
1066 ) {
1067 self.autoindent_requests.clear();
1068
1069 let edits: Vec<_> = indent_sizes
1070 .into_iter()
1071 .filter_map(|(row, indent_size)| {
1072 let current_size = indent_size_for_line(self, row);
1073 Self::edit_for_indent_size_adjustment(row, current_size, indent_size)
1074 })
1075 .collect();
1076
1077 self.edit(edits, None, cx);
1078 }
1079
1080 // Create a minimal edit that will cause the the given row to be indented
1081 // with the given size. After applying this edit, the length of the line
1082 // will always be at least `new_size.len`.
1083 pub fn edit_for_indent_size_adjustment(
1084 row: u32,
1085 current_size: IndentSize,
1086 new_size: IndentSize,
1087 ) -> Option<(Range<Point>, String)> {
1088 if new_size.kind != current_size.kind {
1089 Some((
1090 Point::new(row, 0)..Point::new(row, current_size.len),
1091 iter::repeat(new_size.char())
1092 .take(new_size.len as usize)
1093 .collect::<String>(),
1094 ))
1095 } else {
1096 match new_size.len.cmp(¤t_size.len) {
1097 Ordering::Greater => {
1098 let point = Point::new(row, 0);
1099 Some((
1100 point..point,
1101 iter::repeat(new_size.char())
1102 .take((new_size.len - current_size.len) as usize)
1103 .collect::<String>(),
1104 ))
1105 }
1106
1107 Ordering::Less => Some((
1108 Point::new(row, 0)..Point::new(row, current_size.len - new_size.len),
1109 String::new(),
1110 )),
1111
1112 Ordering::Equal => None,
1113 }
1114 }
1115 }
1116
1117 pub fn diff(&self, mut new_text: String, cx: &AppContext) -> Task<Diff> {
1118 let old_text = self.as_rope().clone();
1119 let base_version = self.version();
1120 cx.background().spawn(async move {
1121 let old_text = old_text.to_string();
1122 let line_ending = LineEnding::detect(&new_text);
1123 LineEnding::normalize(&mut new_text);
1124 let diff = TextDiff::from_chars(old_text.as_str(), new_text.as_str());
1125 let mut edits = Vec::new();
1126 let mut offset = 0;
1127 let empty: Arc<str> = "".into();
1128 for change in diff.iter_all_changes() {
1129 let value = change.value();
1130 let end_offset = offset + value.len();
1131 match change.tag() {
1132 ChangeTag::Equal => {
1133 offset = end_offset;
1134 }
1135 ChangeTag::Delete => {
1136 edits.push((offset..end_offset, empty.clone()));
1137 offset = end_offset;
1138 }
1139 ChangeTag::Insert => {
1140 edits.push((offset..offset, value.into()));
1141 }
1142 }
1143 }
1144 Diff {
1145 base_version,
1146 line_ending,
1147 edits,
1148 }
1149 })
1150 }
1151
1152 /// Spawn a background task that searches the buffer for any whitespace
1153 /// at the ends of a lines, and returns a `Diff` that removes that whitespace.
1154 pub fn remove_trailing_whitespace(&self, cx: &AppContext) -> Task<Diff> {
1155 let old_text = self.as_rope().clone();
1156 let line_ending = self.line_ending();
1157 let base_version = self.version();
1158 cx.background().spawn(async move {
1159 let ranges = trailing_whitespace_ranges(&old_text);
1160 let empty = Arc::<str>::from("");
1161 Diff {
1162 base_version,
1163 line_ending,
1164 edits: ranges
1165 .into_iter()
1166 .map(|range| (range, empty.clone()))
1167 .collect(),
1168 }
1169 })
1170 }
1171
1172 /// Ensure that the buffer ends with a single newline character, and
1173 /// no other whitespace.
1174 pub fn ensure_final_newline(&mut self, cx: &mut ModelContext<Self>) {
1175 let len = self.len();
1176 let mut offset = len;
1177 for chunk in self.as_rope().reversed_chunks_in_range(0..len) {
1178 let non_whitespace_len = chunk
1179 .trim_end_matches(|c: char| c.is_ascii_whitespace())
1180 .len();
1181 offset -= chunk.len();
1182 offset += non_whitespace_len;
1183 if non_whitespace_len != 0 {
1184 if offset == len - 1 && chunk.get(non_whitespace_len..) == Some("\n") {
1185 return;
1186 }
1187 break;
1188 }
1189 }
1190 self.edit([(offset..len, "\n")], None, cx);
1191 }
1192
1193 /// Apply a diff to the buffer. If the buffer has changed since the given diff was
1194 /// calculated, then adjust the diff to account for those changes, and discard any
1195 /// parts of the diff that conflict with those changes.
1196 pub fn apply_diff(&mut self, diff: Diff, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1197 // Check for any edits to the buffer that have occurred since this diff
1198 // was computed.
1199 let snapshot = self.snapshot();
1200 let mut edits_since = snapshot.edits_since::<usize>(&diff.base_version).peekable();
1201 let mut delta = 0;
1202 let adjusted_edits = diff.edits.into_iter().filter_map(|(range, new_text)| {
1203 while let Some(edit_since) = edits_since.peek() {
1204 // If the edit occurs after a diff hunk, then it does not
1205 // affect that hunk.
1206 if edit_since.old.start > range.end {
1207 break;
1208 }
1209 // If the edit precedes the diff hunk, then adjust the hunk
1210 // to reflect the edit.
1211 else if edit_since.old.end < range.start {
1212 delta += edit_since.new_len() as i64 - edit_since.old_len() as i64;
1213 edits_since.next();
1214 }
1215 // If the edit intersects a diff hunk, then discard that hunk.
1216 else {
1217 return None;
1218 }
1219 }
1220
1221 let start = (range.start as i64 + delta) as usize;
1222 let end = (range.end as i64 + delta) as usize;
1223 Some((start..end, new_text))
1224 });
1225
1226 self.start_transaction();
1227 self.text.set_line_ending(diff.line_ending);
1228 self.edit(adjusted_edits, None, cx);
1229 self.end_transaction(cx)
1230 }
1231
1232 pub fn is_dirty(&self) -> bool {
1233 self.saved_version_fingerprint != self.as_rope().fingerprint()
1234 || self.file.as_ref().map_or(false, |file| file.is_deleted())
1235 }
1236
1237 pub fn has_conflict(&self) -> bool {
1238 self.saved_version_fingerprint != self.as_rope().fingerprint()
1239 && self
1240 .file
1241 .as_ref()
1242 .map_or(false, |file| file.mtime() > self.saved_mtime)
1243 }
1244
1245 pub fn subscribe(&mut self) -> Subscription {
1246 self.text.subscribe()
1247 }
1248
1249 pub fn start_transaction(&mut self) -> Option<TransactionId> {
1250 self.start_transaction_at(Instant::now())
1251 }
1252
1253 pub fn start_transaction_at(&mut self, now: Instant) -> Option<TransactionId> {
1254 self.transaction_depth += 1;
1255 if self.was_dirty_before_starting_transaction.is_none() {
1256 self.was_dirty_before_starting_transaction = Some(self.is_dirty());
1257 }
1258 self.text.start_transaction_at(now)
1259 }
1260
1261 pub fn end_transaction(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1262 self.end_transaction_at(Instant::now(), cx)
1263 }
1264
1265 pub fn end_transaction_at(
1266 &mut self,
1267 now: Instant,
1268 cx: &mut ModelContext<Self>,
1269 ) -> Option<TransactionId> {
1270 assert!(self.transaction_depth > 0);
1271 self.transaction_depth -= 1;
1272 let was_dirty = if self.transaction_depth == 0 {
1273 self.was_dirty_before_starting_transaction.take().unwrap()
1274 } else {
1275 false
1276 };
1277 if let Some((transaction_id, start_version)) = self.text.end_transaction_at(now) {
1278 self.did_edit(&start_version, was_dirty, cx);
1279 Some(transaction_id)
1280 } else {
1281 None
1282 }
1283 }
1284
1285 pub fn push_transaction(&mut self, transaction: Transaction, now: Instant) {
1286 self.text.push_transaction(transaction, now);
1287 }
1288
1289 pub fn finalize_last_transaction(&mut self) -> Option<&Transaction> {
1290 self.text.finalize_last_transaction()
1291 }
1292
1293 pub fn group_until_transaction(&mut self, transaction_id: TransactionId) {
1294 self.text.group_until_transaction(transaction_id);
1295 }
1296
1297 pub fn forget_transaction(&mut self, transaction_id: TransactionId) {
1298 self.text.forget_transaction(transaction_id);
1299 }
1300
1301 pub fn wait_for_edits(
1302 &mut self,
1303 edit_ids: impl IntoIterator<Item = clock::Local>,
1304 ) -> impl Future<Output = Result<()>> {
1305 self.text.wait_for_edits(edit_ids)
1306 }
1307
1308 pub fn wait_for_anchors(
1309 &mut self,
1310 anchors: impl IntoIterator<Item = Anchor>,
1311 ) -> impl 'static + Future<Output = Result<()>> {
1312 self.text.wait_for_anchors(anchors)
1313 }
1314
1315 pub fn wait_for_version(&mut self, version: clock::Global) -> impl Future<Output = Result<()>> {
1316 self.text.wait_for_version(version)
1317 }
1318
1319 pub fn give_up_waiting(&mut self) {
1320 self.text.give_up_waiting();
1321 }
1322
1323 pub fn set_active_selections(
1324 &mut self,
1325 selections: Arc<[Selection<Anchor>]>,
1326 line_mode: bool,
1327 cursor_shape: CursorShape,
1328 cx: &mut ModelContext<Self>,
1329 ) {
1330 let lamport_timestamp = self.text.lamport_clock.tick();
1331 self.remote_selections.insert(
1332 self.text.replica_id(),
1333 SelectionSet {
1334 selections: selections.clone(),
1335 lamport_timestamp,
1336 line_mode,
1337 cursor_shape,
1338 },
1339 );
1340 self.send_operation(
1341 Operation::UpdateSelections {
1342 selections,
1343 line_mode,
1344 lamport_timestamp,
1345 cursor_shape,
1346 },
1347 cx,
1348 );
1349 }
1350
1351 pub fn remove_active_selections(&mut self, cx: &mut ModelContext<Self>) {
1352 if self
1353 .remote_selections
1354 .get(&self.text.replica_id())
1355 .map_or(true, |set| !set.selections.is_empty())
1356 {
1357 self.set_active_selections(Arc::from([]), false, Default::default(), cx);
1358 }
1359 }
1360
1361 pub fn set_text<T>(&mut self, text: T, cx: &mut ModelContext<Self>) -> Option<clock::Local>
1362 where
1363 T: Into<Arc<str>>,
1364 {
1365 self.autoindent_requests.clear();
1366 self.edit([(0..self.len(), text)], None, cx)
1367 }
1368
1369 pub fn edit<I, S, T>(
1370 &mut self,
1371 edits_iter: I,
1372 autoindent_mode: Option<AutoindentMode>,
1373 cx: &mut ModelContext<Self>,
1374 ) -> Option<clock::Local>
1375 where
1376 I: IntoIterator<Item = (Range<S>, T)>,
1377 S: ToOffset,
1378 T: Into<Arc<str>>,
1379 {
1380 // Skip invalid edits and coalesce contiguous ones.
1381 let mut edits: Vec<(Range<usize>, Arc<str>)> = Vec::new();
1382 for (range, new_text) in edits_iter {
1383 let mut range = range.start.to_offset(self)..range.end.to_offset(self);
1384 if range.start > range.end {
1385 mem::swap(&mut range.start, &mut range.end);
1386 }
1387 let new_text = new_text.into();
1388 if !new_text.is_empty() || !range.is_empty() {
1389 if let Some((prev_range, prev_text)) = edits.last_mut() {
1390 if prev_range.end >= range.start {
1391 prev_range.end = cmp::max(prev_range.end, range.end);
1392 *prev_text = format!("{prev_text}{new_text}").into();
1393 } else {
1394 edits.push((range, new_text));
1395 }
1396 } else {
1397 edits.push((range, new_text));
1398 }
1399 }
1400 }
1401 if edits.is_empty() {
1402 return None;
1403 }
1404
1405 self.start_transaction();
1406 self.pending_autoindent.take();
1407 let autoindent_request = autoindent_mode
1408 .and_then(|mode| self.language.as_ref().map(|_| (self.snapshot(), mode)));
1409
1410 let edit_operation = self.text.edit(edits.iter().cloned());
1411 let edit_id = edit_operation.local_timestamp();
1412
1413 if let Some((before_edit, mode)) = autoindent_request {
1414 let mut delta = 0isize;
1415 let entries = edits
1416 .into_iter()
1417 .enumerate()
1418 .zip(&edit_operation.as_edit().unwrap().new_text)
1419 .map(|((ix, (range, _)), new_text)| {
1420 let new_text_length = new_text.len();
1421 let old_start = range.start.to_point(&before_edit);
1422 let new_start = (delta + range.start as isize) as usize;
1423 delta += new_text_length as isize - (range.end as isize - range.start as isize);
1424
1425 let mut range_of_insertion_to_indent = 0..new_text_length;
1426 let mut first_line_is_new = false;
1427 let mut original_indent_column = None;
1428
1429 // When inserting an entire line at the beginning of an existing line,
1430 // treat the insertion as new.
1431 if new_text.contains('\n')
1432 && old_start.column <= before_edit.indent_size_for_line(old_start.row).len
1433 {
1434 first_line_is_new = true;
1435 }
1436
1437 // When inserting text starting with a newline, avoid auto-indenting the
1438 // previous line.
1439 if new_text.starts_with('\n') {
1440 range_of_insertion_to_indent.start += 1;
1441 first_line_is_new = true;
1442 }
1443
1444 // Avoid auto-indenting after the insertion.
1445 if let AutoindentMode::Block {
1446 original_indent_columns,
1447 } = &mode
1448 {
1449 original_indent_column =
1450 Some(original_indent_columns.get(ix).copied().unwrap_or_else(|| {
1451 indent_size_for_text(
1452 new_text[range_of_insertion_to_indent.clone()].chars(),
1453 )
1454 .len
1455 }));
1456 if new_text[range_of_insertion_to_indent.clone()].ends_with('\n') {
1457 range_of_insertion_to_indent.end -= 1;
1458 }
1459 }
1460
1461 AutoindentRequestEntry {
1462 first_line_is_new,
1463 original_indent_column,
1464 indent_size: before_edit.language_indent_size_at(range.start, cx),
1465 range: self.anchor_before(new_start + range_of_insertion_to_indent.start)
1466 ..self.anchor_after(new_start + range_of_insertion_to_indent.end),
1467 }
1468 })
1469 .collect();
1470
1471 self.autoindent_requests.push(Arc::new(AutoindentRequest {
1472 before_edit,
1473 entries,
1474 is_block_mode: matches!(mode, AutoindentMode::Block { .. }),
1475 }));
1476 }
1477
1478 self.end_transaction(cx);
1479 self.send_operation(Operation::Buffer(edit_operation), cx);
1480 Some(edit_id)
1481 }
1482
1483 fn did_edit(
1484 &mut self,
1485 old_version: &clock::Global,
1486 was_dirty: bool,
1487 cx: &mut ModelContext<Self>,
1488 ) {
1489 if self.edits_since::<usize>(old_version).next().is_none() {
1490 return;
1491 }
1492
1493 self.reparse(cx);
1494
1495 cx.emit(Event::Edited);
1496 if was_dirty != self.is_dirty() {
1497 cx.emit(Event::DirtyChanged);
1498 }
1499 cx.notify();
1500 }
1501
1502 pub fn apply_ops<I: IntoIterator<Item = Operation>>(
1503 &mut self,
1504 ops: I,
1505 cx: &mut ModelContext<Self>,
1506 ) -> Result<()> {
1507 self.pending_autoindent.take();
1508 let was_dirty = self.is_dirty();
1509 let old_version = self.version.clone();
1510 let mut deferred_ops = Vec::new();
1511 let buffer_ops = ops
1512 .into_iter()
1513 .filter_map(|op| match op {
1514 Operation::Buffer(op) => Some(op),
1515 _ => {
1516 if self.can_apply_op(&op) {
1517 self.apply_op(op, cx);
1518 } else {
1519 deferred_ops.push(op);
1520 }
1521 None
1522 }
1523 })
1524 .collect::<Vec<_>>();
1525 self.text.apply_ops(buffer_ops)?;
1526 self.deferred_ops.insert(deferred_ops);
1527 self.flush_deferred_ops(cx);
1528 self.did_edit(&old_version, was_dirty, cx);
1529 // Notify independently of whether the buffer was edited as the operations could include a
1530 // selection update.
1531 cx.notify();
1532 Ok(())
1533 }
1534
1535 fn flush_deferred_ops(&mut self, cx: &mut ModelContext<Self>) {
1536 let mut deferred_ops = Vec::new();
1537 for op in self.deferred_ops.drain().iter().cloned() {
1538 if self.can_apply_op(&op) {
1539 self.apply_op(op, cx);
1540 } else {
1541 deferred_ops.push(op);
1542 }
1543 }
1544 self.deferred_ops.insert(deferred_ops);
1545 }
1546
1547 fn can_apply_op(&self, operation: &Operation) -> bool {
1548 match operation {
1549 Operation::Buffer(_) => {
1550 unreachable!("buffer operations should never be applied at this layer")
1551 }
1552 Operation::UpdateDiagnostics {
1553 diagnostics: diagnostic_set,
1554 ..
1555 } => diagnostic_set.iter().all(|diagnostic| {
1556 self.text.can_resolve(&diagnostic.range.start)
1557 && self.text.can_resolve(&diagnostic.range.end)
1558 }),
1559 Operation::UpdateSelections { selections, .. } => selections
1560 .iter()
1561 .all(|s| self.can_resolve(&s.start) && self.can_resolve(&s.end)),
1562 Operation::UpdateCompletionTriggers { .. } => true,
1563 }
1564 }
1565
1566 fn apply_op(&mut self, operation: Operation, cx: &mut ModelContext<Self>) {
1567 match operation {
1568 Operation::Buffer(_) => {
1569 unreachable!("buffer operations should never be applied at this layer")
1570 }
1571 Operation::UpdateDiagnostics {
1572 server_id,
1573 diagnostics: diagnostic_set,
1574 lamport_timestamp,
1575 } => {
1576 let snapshot = self.snapshot();
1577 self.apply_diagnostic_update(
1578 server_id,
1579 DiagnosticSet::from_sorted_entries(diagnostic_set.iter().cloned(), &snapshot),
1580 lamport_timestamp,
1581 cx,
1582 );
1583 }
1584 Operation::UpdateSelections {
1585 selections,
1586 lamport_timestamp,
1587 line_mode,
1588 cursor_shape,
1589 } => {
1590 if let Some(set) = self.remote_selections.get(&lamport_timestamp.replica_id) {
1591 if set.lamport_timestamp > lamport_timestamp {
1592 return;
1593 }
1594 }
1595
1596 self.remote_selections.insert(
1597 lamport_timestamp.replica_id,
1598 SelectionSet {
1599 selections,
1600 lamport_timestamp,
1601 line_mode,
1602 cursor_shape,
1603 },
1604 );
1605 self.text.lamport_clock.observe(lamport_timestamp);
1606 self.selections_update_count += 1;
1607 }
1608 Operation::UpdateCompletionTriggers {
1609 triggers,
1610 lamport_timestamp,
1611 } => {
1612 self.completion_triggers = triggers;
1613 self.text.lamport_clock.observe(lamport_timestamp);
1614 }
1615 }
1616 }
1617
1618 fn apply_diagnostic_update(
1619 &mut self,
1620 server_id: LanguageServerId,
1621 diagnostics: DiagnosticSet,
1622 lamport_timestamp: clock::Lamport,
1623 cx: &mut ModelContext<Self>,
1624 ) {
1625 if lamport_timestamp > self.diagnostics_timestamp {
1626 let ix = self.diagnostics.binary_search_by_key(&server_id, |e| e.0);
1627 if diagnostics.len() == 0 {
1628 if let Ok(ix) = ix {
1629 self.diagnostics.remove(ix);
1630 }
1631 } else {
1632 match ix {
1633 Err(ix) => self.diagnostics.insert(ix, (server_id, diagnostics)),
1634 Ok(ix) => self.diagnostics[ix].1 = diagnostics,
1635 };
1636 }
1637 self.diagnostics_timestamp = lamport_timestamp;
1638 self.diagnostics_update_count += 1;
1639 self.text.lamport_clock.observe(lamport_timestamp);
1640 cx.notify();
1641 cx.emit(Event::DiagnosticsUpdated);
1642 }
1643 }
1644
1645 fn send_operation(&mut self, operation: Operation, cx: &mut ModelContext<Self>) {
1646 cx.emit(Event::Operation(operation));
1647 }
1648
1649 pub fn remove_peer(&mut self, replica_id: ReplicaId, cx: &mut ModelContext<Self>) {
1650 self.remote_selections.remove(&replica_id);
1651 cx.notify();
1652 }
1653
1654 pub fn undo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1655 let was_dirty = self.is_dirty();
1656 let old_version = self.version.clone();
1657
1658 if let Some((transaction_id, operation)) = self.text.undo() {
1659 self.send_operation(Operation::Buffer(operation), cx);
1660 self.did_edit(&old_version, was_dirty, cx);
1661 Some(transaction_id)
1662 } else {
1663 None
1664 }
1665 }
1666
1667 pub fn undo_to_transaction(
1668 &mut self,
1669 transaction_id: TransactionId,
1670 cx: &mut ModelContext<Self>,
1671 ) -> bool {
1672 let was_dirty = self.is_dirty();
1673 let old_version = self.version.clone();
1674
1675 let operations = self.text.undo_to_transaction(transaction_id);
1676 let undone = !operations.is_empty();
1677 for operation in operations {
1678 self.send_operation(Operation::Buffer(operation), cx);
1679 }
1680 if undone {
1681 self.did_edit(&old_version, was_dirty, cx)
1682 }
1683 undone
1684 }
1685
1686 pub fn redo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
1687 let was_dirty = self.is_dirty();
1688 let old_version = self.version.clone();
1689
1690 if let Some((transaction_id, operation)) = self.text.redo() {
1691 self.send_operation(Operation::Buffer(operation), cx);
1692 self.did_edit(&old_version, was_dirty, cx);
1693 Some(transaction_id)
1694 } else {
1695 None
1696 }
1697 }
1698
1699 pub fn redo_to_transaction(
1700 &mut self,
1701 transaction_id: TransactionId,
1702 cx: &mut ModelContext<Self>,
1703 ) -> bool {
1704 let was_dirty = self.is_dirty();
1705 let old_version = self.version.clone();
1706
1707 let operations = self.text.redo_to_transaction(transaction_id);
1708 let redone = !operations.is_empty();
1709 for operation in operations {
1710 self.send_operation(Operation::Buffer(operation), cx);
1711 }
1712 if redone {
1713 self.did_edit(&old_version, was_dirty, cx)
1714 }
1715 redone
1716 }
1717
1718 pub fn set_completion_triggers(&mut self, triggers: Vec<String>, cx: &mut ModelContext<Self>) {
1719 self.completion_triggers = triggers.clone();
1720 self.completion_triggers_timestamp = self.text.lamport_clock.tick();
1721 self.send_operation(
1722 Operation::UpdateCompletionTriggers {
1723 triggers,
1724 lamport_timestamp: self.completion_triggers_timestamp,
1725 },
1726 cx,
1727 );
1728 cx.notify();
1729 }
1730
1731 pub fn completion_triggers(&self) -> &[String] {
1732 &self.completion_triggers
1733 }
1734}
1735
1736#[cfg(any(test, feature = "test-support"))]
1737impl Buffer {
1738 pub fn edit_via_marked_text(
1739 &mut self,
1740 marked_string: &str,
1741 autoindent_mode: Option<AutoindentMode>,
1742 cx: &mut ModelContext<Self>,
1743 ) {
1744 let edits = self.edits_for_marked_text(marked_string);
1745 self.edit(edits, autoindent_mode, cx);
1746 }
1747
1748 pub fn set_group_interval(&mut self, group_interval: Duration) {
1749 self.text.set_group_interval(group_interval);
1750 }
1751
1752 pub fn randomly_edit<T>(
1753 &mut self,
1754 rng: &mut T,
1755 old_range_count: usize,
1756 cx: &mut ModelContext<Self>,
1757 ) where
1758 T: rand::Rng,
1759 {
1760 let mut edits: Vec<(Range<usize>, String)> = Vec::new();
1761 let mut last_end = None;
1762 for _ in 0..old_range_count {
1763 if last_end.map_or(false, |last_end| last_end >= self.len()) {
1764 break;
1765 }
1766
1767 let new_start = last_end.map_or(0, |last_end| last_end + 1);
1768 let mut range = self.random_byte_range(new_start, rng);
1769 if rng.gen_bool(0.2) {
1770 mem::swap(&mut range.start, &mut range.end);
1771 }
1772 last_end = Some(range.end);
1773
1774 let new_text_len = rng.gen_range(0..10);
1775 let new_text: String = RandomCharIter::new(&mut *rng).take(new_text_len).collect();
1776
1777 edits.push((range, new_text));
1778 }
1779 log::info!("mutating buffer {} with {:?}", self.replica_id(), edits);
1780 self.edit(edits, None, cx);
1781 }
1782
1783 pub fn randomly_undo_redo(&mut self, rng: &mut impl rand::Rng, cx: &mut ModelContext<Self>) {
1784 let was_dirty = self.is_dirty();
1785 let old_version = self.version.clone();
1786
1787 let ops = self.text.randomly_undo_redo(rng);
1788 if !ops.is_empty() {
1789 for op in ops {
1790 self.send_operation(Operation::Buffer(op), cx);
1791 self.did_edit(&old_version, was_dirty, cx);
1792 }
1793 }
1794 }
1795}
1796
1797impl Entity for Buffer {
1798 type Event = Event;
1799}
1800
1801impl Deref for Buffer {
1802 type Target = TextBuffer;
1803
1804 fn deref(&self) -> &Self::Target {
1805 &self.text
1806 }
1807}
1808
1809impl BufferSnapshot {
1810 pub fn indent_size_for_line(&self, row: u32) -> IndentSize {
1811 indent_size_for_line(self, row)
1812 }
1813
1814 pub fn language_indent_size_at<T: ToOffset>(&self, position: T, cx: &AppContext) -> IndentSize {
1815 let settings = language_settings(self.language_at(position), self.file(), cx);
1816 if settings.hard_tabs {
1817 IndentSize::tab()
1818 } else {
1819 IndentSize::spaces(settings.tab_size.get())
1820 }
1821 }
1822
1823 pub fn suggested_indents(
1824 &self,
1825 rows: impl Iterator<Item = u32>,
1826 single_indent_size: IndentSize,
1827 ) -> BTreeMap<u32, IndentSize> {
1828 let mut result = BTreeMap::new();
1829
1830 for row_range in contiguous_ranges(rows, 10) {
1831 let suggestions = match self.suggest_autoindents(row_range.clone()) {
1832 Some(suggestions) => suggestions,
1833 _ => break,
1834 };
1835
1836 for (row, suggestion) in row_range.zip(suggestions) {
1837 let indent_size = if let Some(suggestion) = suggestion {
1838 result
1839 .get(&suggestion.basis_row)
1840 .copied()
1841 .unwrap_or_else(|| self.indent_size_for_line(suggestion.basis_row))
1842 .with_delta(suggestion.delta, single_indent_size)
1843 } else {
1844 self.indent_size_for_line(row)
1845 };
1846
1847 result.insert(row, indent_size);
1848 }
1849 }
1850
1851 result
1852 }
1853
1854 fn suggest_autoindents(
1855 &self,
1856 row_range: Range<u32>,
1857 ) -> Option<impl Iterator<Item = Option<IndentSuggestion>> + '_> {
1858 let config = &self.language.as_ref()?.config;
1859 let prev_non_blank_row = self.prev_non_blank_row(row_range.start);
1860
1861 // Find the suggested indentation ranges based on the syntax tree.
1862 let start = Point::new(prev_non_blank_row.unwrap_or(row_range.start), 0);
1863 let end = Point::new(row_range.end, 0);
1864 let range = (start..end).to_offset(&self.text);
1865 let mut matches = self.syntax.matches(range.clone(), &self.text, |grammar| {
1866 Some(&grammar.indents_config.as_ref()?.query)
1867 });
1868 let indent_configs = matches
1869 .grammars()
1870 .iter()
1871 .map(|grammar| grammar.indents_config.as_ref().unwrap())
1872 .collect::<Vec<_>>();
1873
1874 let mut indent_ranges = Vec::<Range<Point>>::new();
1875 let mut outdent_positions = Vec::<Point>::new();
1876 while let Some(mat) = matches.peek() {
1877 let mut start: Option<Point> = None;
1878 let mut end: Option<Point> = None;
1879
1880 let config = &indent_configs[mat.grammar_index];
1881 for capture in mat.captures {
1882 if capture.index == config.indent_capture_ix {
1883 start.get_or_insert(Point::from_ts_point(capture.node.start_position()));
1884 end.get_or_insert(Point::from_ts_point(capture.node.end_position()));
1885 } else if Some(capture.index) == config.start_capture_ix {
1886 start = Some(Point::from_ts_point(capture.node.end_position()));
1887 } else if Some(capture.index) == config.end_capture_ix {
1888 end = Some(Point::from_ts_point(capture.node.start_position()));
1889 } else if Some(capture.index) == config.outdent_capture_ix {
1890 outdent_positions.push(Point::from_ts_point(capture.node.start_position()));
1891 }
1892 }
1893
1894 matches.advance();
1895 if let Some((start, end)) = start.zip(end) {
1896 if start.row == end.row {
1897 continue;
1898 }
1899
1900 let range = start..end;
1901 match indent_ranges.binary_search_by_key(&range.start, |r| r.start) {
1902 Err(ix) => indent_ranges.insert(ix, range),
1903 Ok(ix) => {
1904 let prev_range = &mut indent_ranges[ix];
1905 prev_range.end = prev_range.end.max(range.end);
1906 }
1907 }
1908 }
1909 }
1910
1911 let mut error_ranges = Vec::<Range<Point>>::new();
1912 let mut matches = self.syntax.matches(range.clone(), &self.text, |grammar| {
1913 Some(&grammar.error_query)
1914 });
1915 while let Some(mat) = matches.peek() {
1916 let node = mat.captures[0].node;
1917 let start = Point::from_ts_point(node.start_position());
1918 let end = Point::from_ts_point(node.end_position());
1919 let range = start..end;
1920 let ix = match error_ranges.binary_search_by_key(&range.start, |r| r.start) {
1921 Ok(ix) | Err(ix) => ix,
1922 };
1923 let mut end_ix = ix;
1924 while let Some(existing_range) = error_ranges.get(end_ix) {
1925 if existing_range.end < end {
1926 end_ix += 1;
1927 } else {
1928 break;
1929 }
1930 }
1931 error_ranges.splice(ix..end_ix, [range]);
1932 matches.advance();
1933 }
1934
1935 outdent_positions.sort();
1936 for outdent_position in outdent_positions {
1937 // find the innermost indent range containing this outdent_position
1938 // set its end to the outdent position
1939 if let Some(range_to_truncate) = indent_ranges
1940 .iter_mut()
1941 .filter(|indent_range| indent_range.contains(&outdent_position))
1942 .last()
1943 {
1944 range_to_truncate.end = outdent_position;
1945 }
1946 }
1947
1948 // Find the suggested indentation increases and decreased based on regexes.
1949 let mut indent_change_rows = Vec::<(u32, Ordering)>::new();
1950 self.for_each_line(
1951 Point::new(prev_non_blank_row.unwrap_or(row_range.start), 0)
1952 ..Point::new(row_range.end, 0),
1953 |row, line| {
1954 if config
1955 .decrease_indent_pattern
1956 .as_ref()
1957 .map_or(false, |regex| regex.is_match(line))
1958 {
1959 indent_change_rows.push((row, Ordering::Less));
1960 }
1961 if config
1962 .increase_indent_pattern
1963 .as_ref()
1964 .map_or(false, |regex| regex.is_match(line))
1965 {
1966 indent_change_rows.push((row + 1, Ordering::Greater));
1967 }
1968 },
1969 );
1970
1971 let mut indent_changes = indent_change_rows.into_iter().peekable();
1972 let mut prev_row = if config.auto_indent_using_last_non_empty_line {
1973 prev_non_blank_row.unwrap_or(0)
1974 } else {
1975 row_range.start.saturating_sub(1)
1976 };
1977 let mut prev_row_start = Point::new(prev_row, self.indent_size_for_line(prev_row).len);
1978 Some(row_range.map(move |row| {
1979 let row_start = Point::new(row, self.indent_size_for_line(row).len);
1980
1981 let mut indent_from_prev_row = false;
1982 let mut outdent_from_prev_row = false;
1983 let mut outdent_to_row = u32::MAX;
1984
1985 while let Some((indent_row, delta)) = indent_changes.peek() {
1986 match indent_row.cmp(&row) {
1987 Ordering::Equal => match delta {
1988 Ordering::Less => outdent_from_prev_row = true,
1989 Ordering::Greater => indent_from_prev_row = true,
1990 _ => {}
1991 },
1992
1993 Ordering::Greater => break,
1994 Ordering::Less => {}
1995 }
1996
1997 indent_changes.next();
1998 }
1999
2000 for range in &indent_ranges {
2001 if range.start.row >= row {
2002 break;
2003 }
2004 if range.start.row == prev_row && range.end > row_start {
2005 indent_from_prev_row = true;
2006 }
2007 if range.end > prev_row_start && range.end <= row_start {
2008 outdent_to_row = outdent_to_row.min(range.start.row);
2009 }
2010 }
2011
2012 let within_error = error_ranges
2013 .iter()
2014 .any(|e| e.start.row < row && e.end > row_start);
2015
2016 let suggestion = if outdent_to_row == prev_row
2017 || (outdent_from_prev_row && indent_from_prev_row)
2018 {
2019 Some(IndentSuggestion {
2020 basis_row: prev_row,
2021 delta: Ordering::Equal,
2022 within_error,
2023 })
2024 } else if indent_from_prev_row {
2025 Some(IndentSuggestion {
2026 basis_row: prev_row,
2027 delta: Ordering::Greater,
2028 within_error,
2029 })
2030 } else if outdent_to_row < prev_row {
2031 Some(IndentSuggestion {
2032 basis_row: outdent_to_row,
2033 delta: Ordering::Equal,
2034 within_error,
2035 })
2036 } else if outdent_from_prev_row {
2037 Some(IndentSuggestion {
2038 basis_row: prev_row,
2039 delta: Ordering::Less,
2040 within_error,
2041 })
2042 } else if config.auto_indent_using_last_non_empty_line || !self.is_line_blank(prev_row)
2043 {
2044 Some(IndentSuggestion {
2045 basis_row: prev_row,
2046 delta: Ordering::Equal,
2047 within_error,
2048 })
2049 } else {
2050 None
2051 };
2052
2053 prev_row = row;
2054 prev_row_start = row_start;
2055 suggestion
2056 }))
2057 }
2058
2059 fn prev_non_blank_row(&self, mut row: u32) -> Option<u32> {
2060 while row > 0 {
2061 row -= 1;
2062 if !self.is_line_blank(row) {
2063 return Some(row);
2064 }
2065 }
2066 None
2067 }
2068
2069 pub fn chunks<T: ToOffset>(&self, range: Range<T>, language_aware: bool) -> BufferChunks {
2070 let range = range.start.to_offset(self)..range.end.to_offset(self);
2071
2072 let mut syntax = None;
2073 let mut diagnostic_endpoints = Vec::new();
2074 if language_aware {
2075 let captures = self.syntax.captures(range.clone(), &self.text, |grammar| {
2076 grammar.highlights_query.as_ref()
2077 });
2078 let highlight_maps = captures
2079 .grammars()
2080 .into_iter()
2081 .map(|grammar| grammar.highlight_map())
2082 .collect();
2083 syntax = Some((captures, highlight_maps));
2084 for entry in self.diagnostics_in_range::<_, usize>(range.clone(), false) {
2085 diagnostic_endpoints.push(DiagnosticEndpoint {
2086 offset: entry.range.start,
2087 is_start: true,
2088 severity: entry.diagnostic.severity,
2089 is_unnecessary: entry.diagnostic.is_unnecessary,
2090 });
2091 diagnostic_endpoints.push(DiagnosticEndpoint {
2092 offset: entry.range.end,
2093 is_start: false,
2094 severity: entry.diagnostic.severity,
2095 is_unnecessary: entry.diagnostic.is_unnecessary,
2096 });
2097 }
2098 diagnostic_endpoints
2099 .sort_unstable_by_key(|endpoint| (endpoint.offset, !endpoint.is_start));
2100 }
2101
2102 BufferChunks::new(self.text.as_rope(), range, syntax, diagnostic_endpoints)
2103 }
2104
2105 pub fn for_each_line(&self, range: Range<Point>, mut callback: impl FnMut(u32, &str)) {
2106 let mut line = String::new();
2107 let mut row = range.start.row;
2108 for chunk in self
2109 .as_rope()
2110 .chunks_in_range(range.to_offset(self))
2111 .chain(["\n"])
2112 {
2113 for (newline_ix, text) in chunk.split('\n').enumerate() {
2114 if newline_ix > 0 {
2115 callback(row, &line);
2116 row += 1;
2117 line.clear();
2118 }
2119 line.push_str(text);
2120 }
2121 }
2122 }
2123
2124 pub fn syntax_layers(&self) -> impl Iterator<Item = SyntaxLayerInfo> + '_ {
2125 self.syntax.layers_for_range(0..self.len(), &self.text)
2126 }
2127
2128 pub fn syntax_layer_at<D: ToOffset>(&self, position: D) -> Option<SyntaxLayerInfo> {
2129 let offset = position.to_offset(self);
2130 self.syntax
2131 .layers_for_range(offset..offset, &self.text)
2132 .filter(|l| l.node().end_byte() > offset)
2133 .last()
2134 }
2135
2136 pub fn language_at<D: ToOffset>(&self, position: D) -> Option<&Arc<Language>> {
2137 self.syntax_layer_at(position)
2138 .map(|info| info.language)
2139 .or(self.language.as_ref())
2140 }
2141
2142 pub fn settings_at<'a, D: ToOffset>(
2143 &self,
2144 position: D,
2145 cx: &'a AppContext,
2146 ) -> &'a LanguageSettings {
2147 language_settings(self.language_at(position), self.file.as_ref(), cx)
2148 }
2149
2150 pub fn language_scope_at<D: ToOffset>(&self, position: D) -> Option<LanguageScope> {
2151 let offset = position.to_offset(self);
2152 let mut scope = None;
2153 let mut smallest_range: Option<Range<usize>> = None;
2154
2155 // Use the layer that has the smallest node intersecting the given point.
2156 for layer in self.syntax.layers_for_range(offset..offset, &self.text) {
2157 let mut cursor = layer.node().walk();
2158
2159 let mut range = None;
2160 loop {
2161 let child_range = cursor.node().byte_range();
2162 if !child_range.to_inclusive().contains(&offset) {
2163 break;
2164 }
2165
2166 range = Some(child_range);
2167 if cursor.goto_first_child_for_byte(offset).is_none() {
2168 break;
2169 }
2170 }
2171
2172 if let Some(range) = range {
2173 if smallest_range
2174 .as_ref()
2175 .map_or(true, |smallest_range| range.len() < smallest_range.len())
2176 {
2177 smallest_range = Some(range);
2178 scope = Some(LanguageScope {
2179 language: layer.language.clone(),
2180 override_id: layer.override_id(offset, &self.text),
2181 });
2182 }
2183 }
2184 }
2185
2186 scope.or_else(|| {
2187 self.language.clone().map(|language| LanguageScope {
2188 language,
2189 override_id: None,
2190 })
2191 })
2192 }
2193
2194 pub fn surrounding_word<T: ToOffset>(&self, start: T) -> (Range<usize>, Option<CharKind>) {
2195 let mut start = start.to_offset(self);
2196 let mut end = start;
2197 let mut next_chars = self.chars_at(start).peekable();
2198 let mut prev_chars = self.reversed_chars_at(start).peekable();
2199
2200 let language = self.language_at(start);
2201 let kind = |c| char_kind(language, c);
2202 let word_kind = cmp::max(
2203 prev_chars.peek().copied().map(kind),
2204 next_chars.peek().copied().map(kind),
2205 );
2206
2207 for ch in prev_chars {
2208 if Some(kind(ch)) == word_kind && ch != '\n' {
2209 start -= ch.len_utf8();
2210 } else {
2211 break;
2212 }
2213 }
2214
2215 for ch in next_chars {
2216 if Some(kind(ch)) == word_kind && ch != '\n' {
2217 end += ch.len_utf8();
2218 } else {
2219 break;
2220 }
2221 }
2222
2223 (start..end, word_kind)
2224 }
2225
2226 pub fn range_for_syntax_ancestor<T: ToOffset>(&self, range: Range<T>) -> Option<Range<usize>> {
2227 let range = range.start.to_offset(self)..range.end.to_offset(self);
2228 let mut result: Option<Range<usize>> = None;
2229 'outer: for layer in self.syntax.layers_for_range(range.clone(), &self.text) {
2230 let mut cursor = layer.node().walk();
2231
2232 // Descend to the first leaf that touches the start of the range,
2233 // and if the range is non-empty, extends beyond the start.
2234 while cursor.goto_first_child_for_byte(range.start).is_some() {
2235 if !range.is_empty() && cursor.node().end_byte() == range.start {
2236 cursor.goto_next_sibling();
2237 }
2238 }
2239
2240 // Ascend to the smallest ancestor that strictly contains the range.
2241 loop {
2242 let node_range = cursor.node().byte_range();
2243 if node_range.start <= range.start
2244 && node_range.end >= range.end
2245 && node_range.len() > range.len()
2246 {
2247 break;
2248 }
2249 if !cursor.goto_parent() {
2250 continue 'outer;
2251 }
2252 }
2253
2254 let left_node = cursor.node();
2255 let mut layer_result = left_node.byte_range();
2256
2257 // For an empty range, try to find another node immediately to the right of the range.
2258 if left_node.end_byte() == range.start {
2259 let mut right_node = None;
2260 while !cursor.goto_next_sibling() {
2261 if !cursor.goto_parent() {
2262 break;
2263 }
2264 }
2265
2266 while cursor.node().start_byte() == range.start {
2267 right_node = Some(cursor.node());
2268 if !cursor.goto_first_child() {
2269 break;
2270 }
2271 }
2272
2273 // If there is a candidate node on both sides of the (empty) range, then
2274 // decide between the two by favoring a named node over an anonymous token.
2275 // If both nodes are the same in that regard, favor the right one.
2276 if let Some(right_node) = right_node {
2277 if right_node.is_named() || !left_node.is_named() {
2278 layer_result = right_node.byte_range();
2279 }
2280 }
2281 }
2282
2283 if let Some(previous_result) = &result {
2284 if previous_result.len() < layer_result.len() {
2285 continue;
2286 }
2287 }
2288 result = Some(layer_result);
2289 }
2290
2291 result
2292 }
2293
2294 pub fn outline(&self, theme: Option<&SyntaxTheme>) -> Option<Outline<Anchor>> {
2295 self.outline_items_containing(0..self.len(), true, theme)
2296 .map(Outline::new)
2297 }
2298
2299 pub fn symbols_containing<T: ToOffset>(
2300 &self,
2301 position: T,
2302 theme: Option<&SyntaxTheme>,
2303 ) -> Option<Vec<OutlineItem<Anchor>>> {
2304 let position = position.to_offset(self);
2305 let mut items = self.outline_items_containing(
2306 position.saturating_sub(1)..self.len().min(position + 1),
2307 false,
2308 theme,
2309 )?;
2310 let mut prev_depth = None;
2311 items.retain(|item| {
2312 let result = prev_depth.map_or(true, |prev_depth| item.depth > prev_depth);
2313 prev_depth = Some(item.depth);
2314 result
2315 });
2316 Some(items)
2317 }
2318
2319 fn outline_items_containing(
2320 &self,
2321 range: Range<usize>,
2322 include_extra_context: bool,
2323 theme: Option<&SyntaxTheme>,
2324 ) -> Option<Vec<OutlineItem<Anchor>>> {
2325 let mut matches = self.syntax.matches(range.clone(), &self.text, |grammar| {
2326 grammar.outline_config.as_ref().map(|c| &c.query)
2327 });
2328 let configs = matches
2329 .grammars()
2330 .iter()
2331 .map(|g| g.outline_config.as_ref().unwrap())
2332 .collect::<Vec<_>>();
2333
2334 let mut stack = Vec::<Range<usize>>::new();
2335 let mut items = Vec::new();
2336 while let Some(mat) = matches.peek() {
2337 let config = &configs[mat.grammar_index];
2338 let item_node = mat.captures.iter().find_map(|cap| {
2339 if cap.index == config.item_capture_ix {
2340 Some(cap.node)
2341 } else {
2342 None
2343 }
2344 })?;
2345
2346 let item_range = item_node.byte_range();
2347 if item_range.end < range.start || item_range.start > range.end {
2348 matches.advance();
2349 continue;
2350 }
2351
2352 let mut buffer_ranges = Vec::new();
2353 for capture in mat.captures {
2354 let node_is_name;
2355 if capture.index == config.name_capture_ix {
2356 node_is_name = true;
2357 } else if Some(capture.index) == config.context_capture_ix
2358 || (Some(capture.index) == config.extra_context_capture_ix
2359 && include_extra_context)
2360 {
2361 node_is_name = false;
2362 } else {
2363 continue;
2364 }
2365
2366 let mut range = capture.node.start_byte()..capture.node.end_byte();
2367 let start = capture.node.start_position();
2368 if capture.node.end_position().row > start.row {
2369 range.end =
2370 range.start + self.line_len(start.row as u32) as usize - start.column;
2371 }
2372
2373 buffer_ranges.push((range, node_is_name));
2374 }
2375
2376 if buffer_ranges.is_empty() {
2377 continue;
2378 }
2379
2380 let mut text = String::new();
2381 let mut highlight_ranges = Vec::new();
2382 let mut name_ranges = Vec::new();
2383 let mut chunks = self.chunks(
2384 buffer_ranges.first().unwrap().0.start..buffer_ranges.last().unwrap().0.end,
2385 true,
2386 );
2387 let mut last_buffer_range_end = 0;
2388 for (buffer_range, is_name) in buffer_ranges {
2389 if !text.is_empty() && buffer_range.start > last_buffer_range_end {
2390 text.push(' ');
2391 }
2392 last_buffer_range_end = buffer_range.end;
2393 if is_name {
2394 let mut start = text.len();
2395 let end = start + buffer_range.len();
2396
2397 // When multiple names are captured, then the matcheable text
2398 // includes the whitespace in between the names.
2399 if !name_ranges.is_empty() {
2400 start -= 1;
2401 }
2402
2403 name_ranges.push(start..end);
2404 }
2405
2406 let mut offset = buffer_range.start;
2407 chunks.seek(offset);
2408 for mut chunk in chunks.by_ref() {
2409 if chunk.text.len() > buffer_range.end - offset {
2410 chunk.text = &chunk.text[0..(buffer_range.end - offset)];
2411 offset = buffer_range.end;
2412 } else {
2413 offset += chunk.text.len();
2414 }
2415 let style = chunk
2416 .syntax_highlight_id
2417 .zip(theme)
2418 .and_then(|(highlight, theme)| highlight.style(theme));
2419 if let Some(style) = style {
2420 let start = text.len();
2421 let end = start + chunk.text.len();
2422 highlight_ranges.push((start..end, style));
2423 }
2424 text.push_str(chunk.text);
2425 if offset >= buffer_range.end {
2426 break;
2427 }
2428 }
2429 }
2430
2431 matches.advance();
2432 while stack.last().map_or(false, |prev_range| {
2433 prev_range.start > item_range.start || prev_range.end < item_range.end
2434 }) {
2435 stack.pop();
2436 }
2437 stack.push(item_range.clone());
2438
2439 items.push(OutlineItem {
2440 depth: stack.len() - 1,
2441 range: self.anchor_after(item_range.start)..self.anchor_before(item_range.end),
2442 text,
2443 highlight_ranges,
2444 name_ranges,
2445 })
2446 }
2447 Some(items)
2448 }
2449
2450 /// Returns bracket range pairs overlapping or adjacent to `range`
2451 pub fn bracket_ranges<'a, T: ToOffset>(
2452 &'a self,
2453 range: Range<T>,
2454 ) -> impl Iterator<Item = (Range<usize>, Range<usize>)> + 'a {
2455 // Find bracket pairs that *inclusively* contain the given range.
2456 let range = range.start.to_offset(self).saturating_sub(1)
2457 ..self.len().min(range.end.to_offset(self) + 1);
2458
2459 let mut matches = self.syntax.matches(range.clone(), &self.text, |grammar| {
2460 grammar.brackets_config.as_ref().map(|c| &c.query)
2461 });
2462 let configs = matches
2463 .grammars()
2464 .iter()
2465 .map(|grammar| grammar.brackets_config.as_ref().unwrap())
2466 .collect::<Vec<_>>();
2467
2468 iter::from_fn(move || {
2469 while let Some(mat) = matches.peek() {
2470 let mut open = None;
2471 let mut close = None;
2472 let config = &configs[mat.grammar_index];
2473 for capture in mat.captures {
2474 if capture.index == config.open_capture_ix {
2475 open = Some(capture.node.byte_range());
2476 } else if capture.index == config.close_capture_ix {
2477 close = Some(capture.node.byte_range());
2478 }
2479 }
2480
2481 matches.advance();
2482
2483 let Some((open, close)) = open.zip(close) else {
2484 continue;
2485 };
2486
2487 let bracket_range = open.start..=close.end;
2488 if !bracket_range.overlaps(&range) {
2489 continue;
2490 }
2491
2492 return Some((open, close));
2493 }
2494 None
2495 })
2496 }
2497
2498 #[allow(clippy::type_complexity)]
2499 pub fn remote_selections_in_range(
2500 &self,
2501 range: Range<Anchor>,
2502 ) -> impl Iterator<
2503 Item = (
2504 ReplicaId,
2505 bool,
2506 CursorShape,
2507 impl Iterator<Item = &Selection<Anchor>> + '_,
2508 ),
2509 > + '_ {
2510 self.remote_selections
2511 .iter()
2512 .filter(|(replica_id, set)| {
2513 **replica_id != self.text.replica_id() && !set.selections.is_empty()
2514 })
2515 .map(move |(replica_id, set)| {
2516 let start_ix = match set.selections.binary_search_by(|probe| {
2517 probe.end.cmp(&range.start, self).then(Ordering::Greater)
2518 }) {
2519 Ok(ix) | Err(ix) => ix,
2520 };
2521 let end_ix = match set.selections.binary_search_by(|probe| {
2522 probe.start.cmp(&range.end, self).then(Ordering::Less)
2523 }) {
2524 Ok(ix) | Err(ix) => ix,
2525 };
2526
2527 (
2528 *replica_id,
2529 set.line_mode,
2530 set.cursor_shape,
2531 set.selections[start_ix..end_ix].iter(),
2532 )
2533 })
2534 }
2535
2536 pub fn git_diff_hunks_in_row_range<'a>(
2537 &'a self,
2538 range: Range<u32>,
2539 ) -> impl 'a + Iterator<Item = git::diff::DiffHunk<u32>> {
2540 self.git_diff.hunks_in_row_range(range, self)
2541 }
2542
2543 pub fn git_diff_hunks_intersecting_range<'a>(
2544 &'a self,
2545 range: Range<Anchor>,
2546 ) -> impl 'a + Iterator<Item = git::diff::DiffHunk<u32>> {
2547 self.git_diff.hunks_intersecting_range(range, self)
2548 }
2549
2550 pub fn git_diff_hunks_intersecting_range_rev<'a>(
2551 &'a self,
2552 range: Range<Anchor>,
2553 ) -> impl 'a + Iterator<Item = git::diff::DiffHunk<u32>> {
2554 self.git_diff.hunks_intersecting_range_rev(range, self)
2555 }
2556
2557 pub fn diagnostics_in_range<'a, T, O>(
2558 &'a self,
2559 search_range: Range<T>,
2560 reversed: bool,
2561 ) -> impl 'a + Iterator<Item = DiagnosticEntry<O>>
2562 where
2563 T: 'a + Clone + ToOffset,
2564 O: 'a + FromAnchor + Ord,
2565 {
2566 let mut iterators: Vec<_> = self
2567 .diagnostics
2568 .iter()
2569 .map(|(_, collection)| {
2570 collection
2571 .range::<T, O>(search_range.clone(), self, true, reversed)
2572 .peekable()
2573 })
2574 .collect();
2575
2576 std::iter::from_fn(move || {
2577 let (next_ix, _) = iterators
2578 .iter_mut()
2579 .enumerate()
2580 .flat_map(|(ix, iter)| Some((ix, iter.peek()?)))
2581 .min_by(|(_, a), (_, b)| a.range.start.cmp(&b.range.start))?;
2582 iterators[next_ix].next()
2583 })
2584 }
2585
2586 pub fn diagnostic_groups(
2587 &self,
2588 language_server_id: Option<LanguageServerId>,
2589 ) -> Vec<(LanguageServerId, DiagnosticGroup<Anchor>)> {
2590 let mut groups = Vec::new();
2591
2592 if let Some(language_server_id) = language_server_id {
2593 if let Ok(ix) = self
2594 .diagnostics
2595 .binary_search_by_key(&language_server_id, |e| e.0)
2596 {
2597 self.diagnostics[ix]
2598 .1
2599 .groups(language_server_id, &mut groups, self);
2600 }
2601 } else {
2602 for (language_server_id, diagnostics) in self.diagnostics.iter() {
2603 diagnostics.groups(*language_server_id, &mut groups, self);
2604 }
2605 }
2606
2607 groups.sort_by(|(id_a, group_a), (id_b, group_b)| {
2608 let a_start = &group_a.entries[group_a.primary_ix].range.start;
2609 let b_start = &group_b.entries[group_b.primary_ix].range.start;
2610 a_start.cmp(b_start, self).then_with(|| id_a.cmp(&id_b))
2611 });
2612
2613 groups
2614 }
2615
2616 pub fn diagnostic_group<'a, O>(
2617 &'a self,
2618 group_id: usize,
2619 ) -> impl 'a + Iterator<Item = DiagnosticEntry<O>>
2620 where
2621 O: 'a + FromAnchor,
2622 {
2623 self.diagnostics
2624 .iter()
2625 .flat_map(move |(_, set)| set.group(group_id, self))
2626 }
2627
2628 pub fn diagnostics_update_count(&self) -> usize {
2629 self.diagnostics_update_count
2630 }
2631
2632 pub fn parse_count(&self) -> usize {
2633 self.parse_count
2634 }
2635
2636 pub fn selections_update_count(&self) -> usize {
2637 self.selections_update_count
2638 }
2639
2640 pub fn file(&self) -> Option<&Arc<dyn File>> {
2641 self.file.as_ref()
2642 }
2643
2644 pub fn resolve_file_path(&self, cx: &AppContext, include_root: bool) -> Option<PathBuf> {
2645 if let Some(file) = self.file() {
2646 if file.path().file_name().is_none() || include_root {
2647 Some(file.full_path(cx))
2648 } else {
2649 Some(file.path().to_path_buf())
2650 }
2651 } else {
2652 None
2653 }
2654 }
2655
2656 pub fn file_update_count(&self) -> usize {
2657 self.file_update_count
2658 }
2659
2660 pub fn git_diff_update_count(&self) -> usize {
2661 self.git_diff_update_count
2662 }
2663}
2664
2665fn indent_size_for_line(text: &text::BufferSnapshot, row: u32) -> IndentSize {
2666 indent_size_for_text(text.chars_at(Point::new(row, 0)))
2667}
2668
2669pub fn indent_size_for_text(text: impl Iterator<Item = char>) -> IndentSize {
2670 let mut result = IndentSize::spaces(0);
2671 for c in text {
2672 let kind = match c {
2673 ' ' => IndentKind::Space,
2674 '\t' => IndentKind::Tab,
2675 _ => break,
2676 };
2677 if result.len == 0 {
2678 result.kind = kind;
2679 }
2680 result.len += 1;
2681 }
2682 result
2683}
2684
2685impl Clone for BufferSnapshot {
2686 fn clone(&self) -> Self {
2687 Self {
2688 text: self.text.clone(),
2689 git_diff: self.git_diff.clone(),
2690 syntax: self.syntax.clone(),
2691 file: self.file.clone(),
2692 remote_selections: self.remote_selections.clone(),
2693 diagnostics: self.diagnostics.clone(),
2694 selections_update_count: self.selections_update_count,
2695 diagnostics_update_count: self.diagnostics_update_count,
2696 file_update_count: self.file_update_count,
2697 git_diff_update_count: self.git_diff_update_count,
2698 language: self.language.clone(),
2699 parse_count: self.parse_count,
2700 }
2701 }
2702}
2703
2704impl Deref for BufferSnapshot {
2705 type Target = text::BufferSnapshot;
2706
2707 fn deref(&self) -> &Self::Target {
2708 &self.text
2709 }
2710}
2711
2712unsafe impl<'a> Send for BufferChunks<'a> {}
2713
2714impl<'a> BufferChunks<'a> {
2715 pub(crate) fn new(
2716 text: &'a Rope,
2717 range: Range<usize>,
2718 syntax: Option<(SyntaxMapCaptures<'a>, Vec<HighlightMap>)>,
2719 diagnostic_endpoints: Vec<DiagnosticEndpoint>,
2720 ) -> Self {
2721 let mut highlights = None;
2722 if let Some((captures, highlight_maps)) = syntax {
2723 highlights = Some(BufferChunkHighlights {
2724 captures,
2725 next_capture: None,
2726 stack: Default::default(),
2727 highlight_maps,
2728 })
2729 }
2730
2731 let diagnostic_endpoints = diagnostic_endpoints.into_iter().peekable();
2732 let chunks = text.chunks_in_range(range.clone());
2733
2734 BufferChunks {
2735 range,
2736 chunks,
2737 diagnostic_endpoints,
2738 error_depth: 0,
2739 warning_depth: 0,
2740 information_depth: 0,
2741 hint_depth: 0,
2742 unnecessary_depth: 0,
2743 highlights,
2744 }
2745 }
2746
2747 pub fn seek(&mut self, offset: usize) {
2748 self.range.start = offset;
2749 self.chunks.seek(self.range.start);
2750 if let Some(highlights) = self.highlights.as_mut() {
2751 highlights
2752 .stack
2753 .retain(|(end_offset, _)| *end_offset > offset);
2754 if let Some(capture) = &highlights.next_capture {
2755 if offset >= capture.node.start_byte() {
2756 let next_capture_end = capture.node.end_byte();
2757 if offset < next_capture_end {
2758 highlights.stack.push((
2759 next_capture_end,
2760 highlights.highlight_maps[capture.grammar_index].get(capture.index),
2761 ));
2762 }
2763 highlights.next_capture.take();
2764 }
2765 }
2766 highlights.captures.set_byte_range(self.range.clone());
2767 }
2768 }
2769
2770 pub fn offset(&self) -> usize {
2771 self.range.start
2772 }
2773
2774 fn update_diagnostic_depths(&mut self, endpoint: DiagnosticEndpoint) {
2775 let depth = match endpoint.severity {
2776 DiagnosticSeverity::ERROR => &mut self.error_depth,
2777 DiagnosticSeverity::WARNING => &mut self.warning_depth,
2778 DiagnosticSeverity::INFORMATION => &mut self.information_depth,
2779 DiagnosticSeverity::HINT => &mut self.hint_depth,
2780 _ => return,
2781 };
2782 if endpoint.is_start {
2783 *depth += 1;
2784 } else {
2785 *depth -= 1;
2786 }
2787
2788 if endpoint.is_unnecessary {
2789 if endpoint.is_start {
2790 self.unnecessary_depth += 1;
2791 } else {
2792 self.unnecessary_depth -= 1;
2793 }
2794 }
2795 }
2796
2797 fn current_diagnostic_severity(&self) -> Option<DiagnosticSeverity> {
2798 if self.error_depth > 0 {
2799 Some(DiagnosticSeverity::ERROR)
2800 } else if self.warning_depth > 0 {
2801 Some(DiagnosticSeverity::WARNING)
2802 } else if self.information_depth > 0 {
2803 Some(DiagnosticSeverity::INFORMATION)
2804 } else if self.hint_depth > 0 {
2805 Some(DiagnosticSeverity::HINT)
2806 } else {
2807 None
2808 }
2809 }
2810
2811 fn current_code_is_unnecessary(&self) -> bool {
2812 self.unnecessary_depth > 0
2813 }
2814}
2815
2816impl<'a> Iterator for BufferChunks<'a> {
2817 type Item = Chunk<'a>;
2818
2819 fn next(&mut self) -> Option<Self::Item> {
2820 let mut next_capture_start = usize::MAX;
2821 let mut next_diagnostic_endpoint = usize::MAX;
2822
2823 if let Some(highlights) = self.highlights.as_mut() {
2824 while let Some((parent_capture_end, _)) = highlights.stack.last() {
2825 if *parent_capture_end <= self.range.start {
2826 highlights.stack.pop();
2827 } else {
2828 break;
2829 }
2830 }
2831
2832 if highlights.next_capture.is_none() {
2833 highlights.next_capture = highlights.captures.next();
2834 }
2835
2836 while let Some(capture) = highlights.next_capture.as_ref() {
2837 if self.range.start < capture.node.start_byte() {
2838 next_capture_start = capture.node.start_byte();
2839 break;
2840 } else {
2841 let highlight_id =
2842 highlights.highlight_maps[capture.grammar_index].get(capture.index);
2843 highlights
2844 .stack
2845 .push((capture.node.end_byte(), highlight_id));
2846 highlights.next_capture = highlights.captures.next();
2847 }
2848 }
2849 }
2850
2851 while let Some(endpoint) = self.diagnostic_endpoints.peek().copied() {
2852 if endpoint.offset <= self.range.start {
2853 self.update_diagnostic_depths(endpoint);
2854 self.diagnostic_endpoints.next();
2855 } else {
2856 next_diagnostic_endpoint = endpoint.offset;
2857 break;
2858 }
2859 }
2860
2861 if let Some(chunk) = self.chunks.peek() {
2862 let chunk_start = self.range.start;
2863 let mut chunk_end = (self.chunks.offset() + chunk.len())
2864 .min(next_capture_start)
2865 .min(next_diagnostic_endpoint);
2866 let mut highlight_id = None;
2867 if let Some(highlights) = self.highlights.as_ref() {
2868 if let Some((parent_capture_end, parent_highlight_id)) = highlights.stack.last() {
2869 chunk_end = chunk_end.min(*parent_capture_end);
2870 highlight_id = Some(*parent_highlight_id);
2871 }
2872 }
2873
2874 let slice =
2875 &chunk[chunk_start - self.chunks.offset()..chunk_end - self.chunks.offset()];
2876 self.range.start = chunk_end;
2877 if self.range.start == self.chunks.offset() + chunk.len() {
2878 self.chunks.next().unwrap();
2879 }
2880
2881 Some(Chunk {
2882 text: slice,
2883 syntax_highlight_id: highlight_id,
2884 diagnostic_severity: self.current_diagnostic_severity(),
2885 is_unnecessary: self.current_code_is_unnecessary(),
2886 ..Default::default()
2887 })
2888 } else {
2889 None
2890 }
2891 }
2892}
2893
2894impl operation_queue::Operation for Operation {
2895 fn lamport_timestamp(&self) -> clock::Lamport {
2896 match self {
2897 Operation::Buffer(_) => {
2898 unreachable!("buffer operations should never be deferred at this layer")
2899 }
2900 Operation::UpdateDiagnostics {
2901 lamport_timestamp, ..
2902 }
2903 | Operation::UpdateSelections {
2904 lamport_timestamp, ..
2905 }
2906 | Operation::UpdateCompletionTriggers {
2907 lamport_timestamp, ..
2908 } => *lamport_timestamp,
2909 }
2910 }
2911}
2912
2913impl Default for Diagnostic {
2914 fn default() -> Self {
2915 Self {
2916 source: Default::default(),
2917 code: None,
2918 severity: DiagnosticSeverity::ERROR,
2919 message: Default::default(),
2920 group_id: 0,
2921 is_primary: false,
2922 is_valid: true,
2923 is_disk_based: false,
2924 is_unnecessary: false,
2925 }
2926 }
2927}
2928
2929impl IndentSize {
2930 pub fn spaces(len: u32) -> Self {
2931 Self {
2932 len,
2933 kind: IndentKind::Space,
2934 }
2935 }
2936
2937 pub fn tab() -> Self {
2938 Self {
2939 len: 1,
2940 kind: IndentKind::Tab,
2941 }
2942 }
2943
2944 pub fn chars(&self) -> impl Iterator<Item = char> {
2945 iter::repeat(self.char()).take(self.len as usize)
2946 }
2947
2948 pub fn char(&self) -> char {
2949 match self.kind {
2950 IndentKind::Space => ' ',
2951 IndentKind::Tab => '\t',
2952 }
2953 }
2954
2955 pub fn with_delta(mut self, direction: Ordering, size: IndentSize) -> Self {
2956 match direction {
2957 Ordering::Less => {
2958 if self.kind == size.kind && self.len >= size.len {
2959 self.len -= size.len;
2960 }
2961 }
2962 Ordering::Equal => {}
2963 Ordering::Greater => {
2964 if self.len == 0 {
2965 self = size;
2966 } else if self.kind == size.kind {
2967 self.len += size.len;
2968 }
2969 }
2970 }
2971 self
2972 }
2973}
2974
2975impl Completion {
2976 pub fn sort_key(&self) -> (usize, &str) {
2977 let kind_key = match self.lsp_completion.kind {
2978 Some(lsp::CompletionItemKind::VARIABLE) => 0,
2979 _ => 1,
2980 };
2981 (kind_key, &self.label.text[self.label.filter_range.clone()])
2982 }
2983
2984 pub fn is_snippet(&self) -> bool {
2985 self.lsp_completion.insert_text_format == Some(lsp::InsertTextFormat::SNIPPET)
2986 }
2987}
2988
2989pub fn contiguous_ranges(
2990 values: impl Iterator<Item = u32>,
2991 max_len: usize,
2992) -> impl Iterator<Item = Range<u32>> {
2993 let mut values = values;
2994 let mut current_range: Option<Range<u32>> = None;
2995 std::iter::from_fn(move || loop {
2996 if let Some(value) = values.next() {
2997 if let Some(range) = &mut current_range {
2998 if value == range.end && range.len() < max_len {
2999 range.end += 1;
3000 continue;
3001 }
3002 }
3003
3004 let prev_range = current_range.clone();
3005 current_range = Some(value..(value + 1));
3006 if prev_range.is_some() {
3007 return prev_range;
3008 }
3009 } else {
3010 return current_range.take();
3011 }
3012 })
3013}
3014
3015pub fn char_kind(language: Option<&Arc<Language>>, c: char) -> CharKind {
3016 if c.is_whitespace() {
3017 return CharKind::Whitespace;
3018 } else if c.is_alphanumeric() || c == '_' {
3019 return CharKind::Word;
3020 }
3021 if let Some(language) = language {
3022 if language.config.word_characters.contains(&c) {
3023 return CharKind::Word;
3024 }
3025 }
3026 CharKind::Punctuation
3027}
3028
3029/// Find all of the ranges of whitespace that occur at the ends of lines
3030/// in the given rope.
3031///
3032/// This could also be done with a regex search, but this implementation
3033/// avoids copying text.
3034pub fn trailing_whitespace_ranges(rope: &Rope) -> Vec<Range<usize>> {
3035 let mut ranges = Vec::new();
3036
3037 let mut offset = 0;
3038 let mut prev_chunk_trailing_whitespace_range = 0..0;
3039 for chunk in rope.chunks() {
3040 let mut prev_line_trailing_whitespace_range = 0..0;
3041 for (i, line) in chunk.split('\n').enumerate() {
3042 let line_end_offset = offset + line.len();
3043 let trimmed_line_len = line.trim_end_matches(|c| matches!(c, ' ' | '\t')).len();
3044 let mut trailing_whitespace_range = (offset + trimmed_line_len)..line_end_offset;
3045
3046 if i == 0 && trimmed_line_len == 0 {
3047 trailing_whitespace_range.start = prev_chunk_trailing_whitespace_range.start;
3048 }
3049 if !prev_line_trailing_whitespace_range.is_empty() {
3050 ranges.push(prev_line_trailing_whitespace_range);
3051 }
3052
3053 offset = line_end_offset + 1;
3054 prev_line_trailing_whitespace_range = trailing_whitespace_range;
3055 }
3056
3057 offset -= 1;
3058 prev_chunk_trailing_whitespace_range = prev_line_trailing_whitespace_range;
3059 }
3060
3061 if !prev_chunk_trailing_whitespace_range.is_empty() {
3062 ranges.push(prev_chunk_trailing_whitespace_range);
3063 }
3064
3065 ranges
3066}