1use crate::{
2 ProjectItem as _, ProjectPath,
3 lsp_store::OpenLspBufferHandle,
4 search::SearchQuery,
5 worktree_store::{WorktreeStore, WorktreeStoreEvent},
6};
7use anyhow::{Context as _, Result, anyhow};
8use client::Client;
9use collections::{HashMap, HashSet, hash_map};
10use fs::Fs;
11use futures::{Future, FutureExt as _, StreamExt, channel::oneshot, future::Shared};
12use gpui::{
13 App, AppContext as _, AsyncApp, Context, Entity, EventEmitter, Subscription, Task, WeakEntity,
14};
15use language::{
16 Buffer, BufferEvent, Capability, DiskState, File as _, Language, Operation,
17 proto::{
18 deserialize_line_ending, deserialize_version, serialize_line_ending, serialize_version,
19 split_operations,
20 },
21};
22use rpc::{
23 AnyProtoClient, ErrorExt as _, TypedEnvelope,
24 proto::{self, ToProto},
25};
26use smol::channel::Receiver;
27use std::{io, path::Path, pin::pin, sync::Arc, time::Instant};
28use text::BufferId;
29use util::{ResultExt as _, TryFutureExt, debug_panic, maybe};
30use worktree::{File, PathChange, ProjectEntryId, Worktree, WorktreeId};
31
32/// A set of open buffers.
33pub struct BufferStore {
34 state: BufferStoreState,
35 #[allow(clippy::type_complexity)]
36 loading_buffers: HashMap<ProjectPath, Shared<Task<Result<Entity<Buffer>, Arc<anyhow::Error>>>>>,
37 worktree_store: Entity<WorktreeStore>,
38 opened_buffers: HashMap<BufferId, OpenBuffer>,
39 downstream_client: Option<(AnyProtoClient, u64)>,
40 shared_buffers: HashMap<proto::PeerId, HashMap<BufferId, SharedBuffer>>,
41}
42
43#[derive(Hash, Eq, PartialEq, Clone)]
44struct SharedBuffer {
45 buffer: Entity<Buffer>,
46 lsp_handle: Option<OpenLspBufferHandle>,
47}
48
49enum BufferStoreState {
50 Local(LocalBufferStore),
51 Remote(RemoteBufferStore),
52}
53
54struct RemoteBufferStore {
55 shared_with_me: HashSet<Entity<Buffer>>,
56 upstream_client: AnyProtoClient,
57 project_id: u64,
58 loading_remote_buffers_by_id: HashMap<BufferId, Entity<Buffer>>,
59 remote_buffer_listeners:
60 HashMap<BufferId, Vec<oneshot::Sender<Result<Entity<Buffer>, anyhow::Error>>>>,
61 worktree_store: Entity<WorktreeStore>,
62}
63
64struct LocalBufferStore {
65 local_buffer_ids_by_path: HashMap<ProjectPath, BufferId>,
66 local_buffer_ids_by_entry_id: HashMap<ProjectEntryId, BufferId>,
67 worktree_store: Entity<WorktreeStore>,
68 _subscription: Subscription,
69}
70
71enum OpenBuffer {
72 Complete { buffer: WeakEntity<Buffer> },
73 Operations(Vec<Operation>),
74}
75
76pub enum BufferStoreEvent {
77 BufferAdded(Entity<Buffer>),
78 BufferOpened {
79 buffer: Entity<Buffer>,
80 project_path: ProjectPath,
81 },
82 SharedBufferClosed(proto::PeerId, BufferId),
83 BufferDropped(BufferId),
84 BufferChangedFilePath {
85 buffer: Entity<Buffer>,
86 old_file: Option<Arc<dyn language::File>>,
87 },
88}
89
90#[derive(Default, Debug)]
91pub struct ProjectTransaction(pub HashMap<Entity<Buffer>, language::Transaction>);
92
93impl EventEmitter<BufferStoreEvent> for BufferStore {}
94
95impl RemoteBufferStore {
96 pub fn wait_for_remote_buffer(
97 &mut self,
98 id: BufferId,
99 cx: &mut Context<BufferStore>,
100 ) -> Task<Result<Entity<Buffer>>> {
101 let (tx, rx) = oneshot::channel();
102 self.remote_buffer_listeners.entry(id).or_default().push(tx);
103
104 cx.spawn(async move |this, cx| {
105 if let Some(buffer) = this
106 .read_with(cx, |buffer_store, _| buffer_store.get(id))
107 .ok()
108 .flatten()
109 {
110 return Ok(buffer);
111 }
112
113 cx.background_spawn(async move { rx.await? }).await
114 })
115 }
116
117 fn save_remote_buffer(
118 &self,
119 buffer_handle: Entity<Buffer>,
120 new_path: Option<proto::ProjectPath>,
121 cx: &Context<BufferStore>,
122 ) -> Task<Result<()>> {
123 let buffer = buffer_handle.read(cx);
124 let buffer_id = buffer.remote_id().into();
125 let version = buffer.version();
126 let rpc = self.upstream_client.clone();
127 let project_id = self.project_id;
128 cx.spawn(async move |_, cx| {
129 let response = rpc
130 .request(proto::SaveBuffer {
131 project_id,
132 buffer_id,
133 new_path,
134 version: serialize_version(&version),
135 })
136 .await?;
137 let version = deserialize_version(&response.version);
138 let mtime = response.mtime.map(|mtime| mtime.into());
139
140 buffer_handle.update(cx, |buffer, cx| {
141 buffer.did_save(version.clone(), mtime, cx);
142 })?;
143
144 Ok(())
145 })
146 }
147
148 pub fn handle_create_buffer_for_peer(
149 &mut self,
150 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
151 replica_id: u16,
152 capability: Capability,
153 cx: &mut Context<BufferStore>,
154 ) -> Result<Option<Entity<Buffer>>> {
155 match envelope
156 .payload
157 .variant
158 .ok_or_else(|| anyhow!("missing variant"))?
159 {
160 proto::create_buffer_for_peer::Variant::State(mut state) => {
161 let buffer_id = BufferId::new(state.id)?;
162
163 let buffer_result = maybe!({
164 let mut buffer_file = None;
165 if let Some(file) = state.file.take() {
166 let worktree_id = worktree::WorktreeId::from_proto(file.worktree_id);
167 let worktree = self
168 .worktree_store
169 .read(cx)
170 .worktree_for_id(worktree_id, cx)
171 .ok_or_else(|| {
172 anyhow!("no worktree found for id {}", file.worktree_id)
173 })?;
174 buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
175 as Arc<dyn language::File>);
176 }
177 Buffer::from_proto(replica_id, capability, state, buffer_file)
178 });
179
180 match buffer_result {
181 Ok(buffer) => {
182 let buffer = cx.new(|_| buffer);
183 self.loading_remote_buffers_by_id.insert(buffer_id, buffer);
184 }
185 Err(error) => {
186 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
187 for listener in listeners {
188 listener.send(Err(anyhow!(error.cloned()))).ok();
189 }
190 }
191 }
192 }
193 }
194 proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
195 let buffer_id = BufferId::new(chunk.buffer_id)?;
196 let buffer = self
197 .loading_remote_buffers_by_id
198 .get(&buffer_id)
199 .cloned()
200 .ok_or_else(|| {
201 anyhow!(
202 "received chunk for buffer {} without initial state",
203 chunk.buffer_id
204 )
205 })?;
206
207 let result = maybe!({
208 let operations = chunk
209 .operations
210 .into_iter()
211 .map(language::proto::deserialize_operation)
212 .collect::<Result<Vec<_>>>()?;
213 buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx));
214 anyhow::Ok(())
215 });
216
217 if let Err(error) = result {
218 self.loading_remote_buffers_by_id.remove(&buffer_id);
219 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
220 for listener in listeners {
221 listener.send(Err(error.cloned())).ok();
222 }
223 }
224 } else if chunk.is_last {
225 self.loading_remote_buffers_by_id.remove(&buffer_id);
226 if self.upstream_client.is_via_collab() {
227 // retain buffers sent by peers to avoid races.
228 self.shared_with_me.insert(buffer.clone());
229 }
230
231 if let Some(senders) = self.remote_buffer_listeners.remove(&buffer_id) {
232 for sender in senders {
233 sender.send(Ok(buffer.clone())).ok();
234 }
235 }
236 return Ok(Some(buffer));
237 }
238 }
239 }
240 return Ok(None);
241 }
242
243 pub fn incomplete_buffer_ids(&self) -> Vec<BufferId> {
244 self.loading_remote_buffers_by_id
245 .keys()
246 .copied()
247 .collect::<Vec<_>>()
248 }
249
250 pub fn deserialize_project_transaction(
251 &self,
252 message: proto::ProjectTransaction,
253 push_to_history: bool,
254 cx: &mut Context<BufferStore>,
255 ) -> Task<Result<ProjectTransaction>> {
256 cx.spawn(async move |this, cx| {
257 let mut project_transaction = ProjectTransaction::default();
258 for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
259 {
260 let buffer_id = BufferId::new(buffer_id)?;
261 let buffer = this
262 .update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
263 .await?;
264 let transaction = language::proto::deserialize_transaction(transaction)?;
265 project_transaction.0.insert(buffer, transaction);
266 }
267
268 for (buffer, transaction) in &project_transaction.0 {
269 buffer
270 .update(cx, |buffer, _| {
271 buffer.wait_for_edits(transaction.edit_ids.iter().copied())
272 })?
273 .await?;
274
275 if push_to_history {
276 buffer.update(cx, |buffer, _| {
277 buffer.push_transaction(transaction.clone(), Instant::now());
278 })?;
279 }
280 }
281
282 Ok(project_transaction)
283 })
284 }
285
286 fn open_buffer(
287 &self,
288 path: Arc<Path>,
289 worktree: Entity<Worktree>,
290 cx: &mut Context<BufferStore>,
291 ) -> Task<Result<Entity<Buffer>>> {
292 let worktree_id = worktree.read(cx).id().to_proto();
293 let project_id = self.project_id;
294 let client = self.upstream_client.clone();
295 cx.spawn(async move |this, cx| {
296 let response = client
297 .request(proto::OpenBufferByPath {
298 project_id,
299 worktree_id,
300 path: path.to_proto(),
301 })
302 .await?;
303 let buffer_id = BufferId::new(response.buffer_id)?;
304
305 let buffer = this
306 .update(cx, {
307 |this, cx| this.wait_for_remote_buffer(buffer_id, cx)
308 })?
309 .await?;
310
311 Ok(buffer)
312 })
313 }
314
315 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
316 let create = self.upstream_client.request(proto::OpenNewBuffer {
317 project_id: self.project_id,
318 });
319 cx.spawn(async move |this, cx| {
320 let response = create.await?;
321 let buffer_id = BufferId::new(response.buffer_id)?;
322
323 this.update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
324 .await
325 })
326 }
327
328 fn reload_buffers(
329 &self,
330 buffers: HashSet<Entity<Buffer>>,
331 push_to_history: bool,
332 cx: &mut Context<BufferStore>,
333 ) -> Task<Result<ProjectTransaction>> {
334 let request = self.upstream_client.request(proto::ReloadBuffers {
335 project_id: self.project_id,
336 buffer_ids: buffers
337 .iter()
338 .map(|buffer| buffer.read(cx).remote_id().to_proto())
339 .collect(),
340 });
341
342 cx.spawn(async move |this, cx| {
343 let response = request
344 .await?
345 .transaction
346 .ok_or_else(|| anyhow!("missing transaction"))?;
347 this.update(cx, |this, cx| {
348 this.deserialize_project_transaction(response, push_to_history, cx)
349 })?
350 .await
351 })
352 }
353}
354
355impl LocalBufferStore {
356 fn save_local_buffer(
357 &self,
358 buffer_handle: Entity<Buffer>,
359 worktree: Entity<Worktree>,
360 path: Arc<Path>,
361 mut has_changed_file: bool,
362 cx: &mut Context<BufferStore>,
363 ) -> Task<Result<()>> {
364 let buffer = buffer_handle.read(cx);
365
366 let text = buffer.as_rope().clone();
367 let line_ending = buffer.line_ending();
368 let version = buffer.version();
369 let buffer_id = buffer.remote_id();
370 if buffer
371 .file()
372 .is_some_and(|file| file.disk_state() == DiskState::New)
373 {
374 has_changed_file = true;
375 }
376
377 let save = worktree.update(cx, |worktree, cx| {
378 worktree.write_file(path.as_ref(), text, line_ending, cx)
379 });
380
381 cx.spawn(async move |this, cx| {
382 let new_file = save.await?;
383 let mtime = new_file.disk_state().mtime();
384 this.update(cx, |this, cx| {
385 if let Some((downstream_client, project_id)) = this.downstream_client.clone() {
386 if has_changed_file {
387 downstream_client
388 .send(proto::UpdateBufferFile {
389 project_id,
390 buffer_id: buffer_id.to_proto(),
391 file: Some(language::File::to_proto(&*new_file, cx)),
392 })
393 .log_err();
394 }
395 downstream_client
396 .send(proto::BufferSaved {
397 project_id,
398 buffer_id: buffer_id.to_proto(),
399 version: serialize_version(&version),
400 mtime: mtime.map(|time| time.into()),
401 })
402 .log_err();
403 }
404 })?;
405 buffer_handle.update(cx, |buffer, cx| {
406 if has_changed_file {
407 buffer.file_updated(new_file, cx);
408 }
409 buffer.did_save(version.clone(), mtime, cx);
410 })
411 })
412 }
413
414 fn subscribe_to_worktree(
415 &mut self,
416 worktree: &Entity<Worktree>,
417 cx: &mut Context<BufferStore>,
418 ) {
419 cx.subscribe(worktree, |this, worktree, event, cx| {
420 if worktree.read(cx).is_local() {
421 match event {
422 worktree::Event::UpdatedEntries(changes) => {
423 Self::local_worktree_entries_changed(this, &worktree, changes, cx);
424 }
425 _ => {}
426 }
427 }
428 })
429 .detach();
430 }
431
432 fn local_worktree_entries_changed(
433 this: &mut BufferStore,
434 worktree_handle: &Entity<Worktree>,
435 changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
436 cx: &mut Context<BufferStore>,
437 ) {
438 let snapshot = worktree_handle.read(cx).snapshot();
439 for (path, entry_id, _) in changes {
440 Self::local_worktree_entry_changed(
441 this,
442 *entry_id,
443 path,
444 worktree_handle,
445 &snapshot,
446 cx,
447 );
448 }
449 }
450
451 fn local_worktree_entry_changed(
452 this: &mut BufferStore,
453 entry_id: ProjectEntryId,
454 path: &Arc<Path>,
455 worktree: &Entity<worktree::Worktree>,
456 snapshot: &worktree::Snapshot,
457 cx: &mut Context<BufferStore>,
458 ) -> Option<()> {
459 let project_path = ProjectPath {
460 worktree_id: snapshot.id(),
461 path: path.clone(),
462 };
463
464 let buffer_id = {
465 let local = this.as_local_mut()?;
466 match local.local_buffer_ids_by_entry_id.get(&entry_id) {
467 Some(&buffer_id) => buffer_id,
468 None => local.local_buffer_ids_by_path.get(&project_path).copied()?,
469 }
470 };
471
472 let buffer = if let Some(buffer) = this.get(buffer_id) {
473 Some(buffer)
474 } else {
475 this.opened_buffers.remove(&buffer_id);
476 None
477 };
478
479 let buffer = if let Some(buffer) = buffer {
480 buffer
481 } else {
482 let this = this.as_local_mut()?;
483 this.local_buffer_ids_by_path.remove(&project_path);
484 this.local_buffer_ids_by_entry_id.remove(&entry_id);
485 return None;
486 };
487
488 let events = buffer.update(cx, |buffer, cx| {
489 let local = this.as_local_mut()?;
490 let file = buffer.file()?;
491 let old_file = File::from_dyn(Some(file))?;
492 if old_file.worktree != *worktree {
493 return None;
494 }
495
496 let snapshot_entry = old_file
497 .entry_id
498 .and_then(|entry_id| snapshot.entry_for_id(entry_id))
499 .or_else(|| snapshot.entry_for_path(old_file.path.as_ref()));
500
501 let new_file = if let Some(entry) = snapshot_entry {
502 File {
503 disk_state: match entry.mtime {
504 Some(mtime) => DiskState::Present { mtime },
505 None => old_file.disk_state,
506 },
507 is_local: true,
508 entry_id: Some(entry.id),
509 path: entry.path.clone(),
510 worktree: worktree.clone(),
511 is_private: entry.is_private,
512 }
513 } else {
514 File {
515 disk_state: DiskState::Deleted,
516 is_local: true,
517 entry_id: old_file.entry_id,
518 path: old_file.path.clone(),
519 worktree: worktree.clone(),
520 is_private: old_file.is_private,
521 }
522 };
523
524 if new_file == *old_file {
525 return None;
526 }
527
528 let mut events = Vec::new();
529 if new_file.path != old_file.path {
530 local.local_buffer_ids_by_path.remove(&ProjectPath {
531 path: old_file.path.clone(),
532 worktree_id: old_file.worktree_id(cx),
533 });
534 local.local_buffer_ids_by_path.insert(
535 ProjectPath {
536 worktree_id: new_file.worktree_id(cx),
537 path: new_file.path.clone(),
538 },
539 buffer_id,
540 );
541 events.push(BufferStoreEvent::BufferChangedFilePath {
542 buffer: cx.entity(),
543 old_file: buffer.file().cloned(),
544 });
545 }
546
547 if new_file.entry_id != old_file.entry_id {
548 if let Some(entry_id) = old_file.entry_id {
549 local.local_buffer_ids_by_entry_id.remove(&entry_id);
550 }
551 if let Some(entry_id) = new_file.entry_id {
552 local
553 .local_buffer_ids_by_entry_id
554 .insert(entry_id, buffer_id);
555 }
556 }
557
558 if let Some((client, project_id)) = &this.downstream_client {
559 client
560 .send(proto::UpdateBufferFile {
561 project_id: *project_id,
562 buffer_id: buffer_id.to_proto(),
563 file: Some(new_file.to_proto(cx)),
564 })
565 .ok();
566 }
567
568 buffer.file_updated(Arc::new(new_file), cx);
569 Some(events)
570 })?;
571
572 for event in events {
573 cx.emit(event);
574 }
575
576 None
577 }
578
579 fn buffer_changed_file(&mut self, buffer: Entity<Buffer>, cx: &mut App) -> Option<()> {
580 let file = File::from_dyn(buffer.read(cx).file())?;
581
582 let remote_id = buffer.read(cx).remote_id();
583 if let Some(entry_id) = file.entry_id {
584 match self.local_buffer_ids_by_entry_id.get(&entry_id) {
585 Some(_) => {
586 return None;
587 }
588 None => {
589 self.local_buffer_ids_by_entry_id
590 .insert(entry_id, remote_id);
591 }
592 }
593 };
594 self.local_buffer_ids_by_path.insert(
595 ProjectPath {
596 worktree_id: file.worktree_id(cx),
597 path: file.path.clone(),
598 },
599 remote_id,
600 );
601
602 Some(())
603 }
604
605 fn save_buffer(
606 &self,
607 buffer: Entity<Buffer>,
608 cx: &mut Context<BufferStore>,
609 ) -> Task<Result<()>> {
610 let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
611 return Task::ready(Err(anyhow!("buffer doesn't have a file")));
612 };
613 let worktree = file.worktree.clone();
614 self.save_local_buffer(buffer, worktree, file.path.clone(), false, cx)
615 }
616
617 fn save_buffer_as(
618 &self,
619 buffer: Entity<Buffer>,
620 path: ProjectPath,
621 cx: &mut Context<BufferStore>,
622 ) -> Task<Result<()>> {
623 let Some(worktree) = self
624 .worktree_store
625 .read(cx)
626 .worktree_for_id(path.worktree_id, cx)
627 else {
628 return Task::ready(Err(anyhow!("no such worktree")));
629 };
630 self.save_local_buffer(buffer, worktree, path.path.clone(), true, cx)
631 }
632
633 fn open_buffer(
634 &self,
635 path: Arc<Path>,
636 worktree: Entity<Worktree>,
637 cx: &mut Context<BufferStore>,
638 ) -> Task<Result<Entity<Buffer>>> {
639 let load_buffer = worktree.update(cx, |worktree, cx| {
640 let load_file = worktree.load_file(path.as_ref(), cx);
641 let reservation = cx.reserve_entity();
642 let buffer_id = BufferId::from(reservation.entity_id().as_non_zero_u64());
643 cx.spawn(async move |_, cx| {
644 let loaded = load_file.await?;
645 let text_buffer = cx
646 .background_spawn(async move { text::Buffer::new(0, buffer_id, loaded.text) })
647 .await;
648 cx.insert_entity(reservation, |_| {
649 Buffer::build(text_buffer, Some(loaded.file), Capability::ReadWrite)
650 })
651 })
652 });
653
654 cx.spawn(async move |this, cx| {
655 let buffer = match load_buffer.await {
656 Ok(buffer) => Ok(buffer),
657 Err(error) if is_not_found_error(&error) => cx.new(|cx| {
658 let buffer_id = BufferId::from(cx.entity_id().as_non_zero_u64());
659 let text_buffer = text::Buffer::new(0, buffer_id, "".into());
660 Buffer::build(
661 text_buffer,
662 Some(Arc::new(File {
663 worktree,
664 path,
665 disk_state: DiskState::New,
666 entry_id: None,
667 is_local: true,
668 is_private: false,
669 })),
670 Capability::ReadWrite,
671 )
672 }),
673 Err(e) => Err(e),
674 }?;
675 this.update(cx, |this, cx| {
676 this.add_buffer(buffer.clone(), cx)?;
677 let buffer_id = buffer.read(cx).remote_id();
678 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
679 let this = this.as_local_mut().unwrap();
680 this.local_buffer_ids_by_path.insert(
681 ProjectPath {
682 worktree_id: file.worktree_id(cx),
683 path: file.path.clone(),
684 },
685 buffer_id,
686 );
687
688 if let Some(entry_id) = file.entry_id {
689 this.local_buffer_ids_by_entry_id
690 .insert(entry_id, buffer_id);
691 }
692 }
693
694 anyhow::Ok(())
695 })??;
696
697 Ok(buffer)
698 })
699 }
700
701 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
702 cx.spawn(async move |buffer_store, cx| {
703 let buffer =
704 cx.new(|cx| Buffer::local("", cx).with_language(language::PLAIN_TEXT.clone(), cx))?;
705 buffer_store.update(cx, |buffer_store, cx| {
706 buffer_store.add_buffer(buffer.clone(), cx).log_err();
707 })?;
708 Ok(buffer)
709 })
710 }
711
712 fn reload_buffers(
713 &self,
714 buffers: HashSet<Entity<Buffer>>,
715 push_to_history: bool,
716 cx: &mut Context<BufferStore>,
717 ) -> Task<Result<ProjectTransaction>> {
718 cx.spawn(async move |_, cx| {
719 let mut project_transaction = ProjectTransaction::default();
720 for buffer in buffers {
721 let transaction = buffer.update(cx, |buffer, cx| buffer.reload(cx))?.await?;
722 buffer.update(cx, |buffer, cx| {
723 if let Some(transaction) = transaction {
724 if !push_to_history {
725 buffer.forget_transaction(transaction.id);
726 }
727 project_transaction.0.insert(cx.entity(), transaction);
728 }
729 })?;
730 }
731
732 Ok(project_transaction)
733 })
734 }
735}
736
737impl BufferStore {
738 pub fn init(client: &AnyProtoClient) {
739 client.add_entity_message_handler(Self::handle_buffer_reloaded);
740 client.add_entity_message_handler(Self::handle_buffer_saved);
741 client.add_entity_message_handler(Self::handle_update_buffer_file);
742 client.add_entity_request_handler(Self::handle_save_buffer);
743 client.add_entity_request_handler(Self::handle_reload_buffers);
744 }
745
746 /// Creates a buffer store, optionally retaining its buffers.
747 pub fn local(worktree_store: Entity<WorktreeStore>, cx: &mut Context<Self>) -> Self {
748 Self {
749 state: BufferStoreState::Local(LocalBufferStore {
750 local_buffer_ids_by_path: Default::default(),
751 local_buffer_ids_by_entry_id: Default::default(),
752 worktree_store: worktree_store.clone(),
753 _subscription: cx.subscribe(&worktree_store, |this, _, event, cx| {
754 if let WorktreeStoreEvent::WorktreeAdded(worktree) = event {
755 let this = this.as_local_mut().unwrap();
756 this.subscribe_to_worktree(worktree, cx);
757 }
758 }),
759 }),
760 downstream_client: None,
761 opened_buffers: Default::default(),
762 shared_buffers: Default::default(),
763 loading_buffers: Default::default(),
764 worktree_store,
765 }
766 }
767
768 pub fn remote(
769 worktree_store: Entity<WorktreeStore>,
770 upstream_client: AnyProtoClient,
771 remote_id: u64,
772 _cx: &mut Context<Self>,
773 ) -> Self {
774 Self {
775 state: BufferStoreState::Remote(RemoteBufferStore {
776 shared_with_me: Default::default(),
777 loading_remote_buffers_by_id: Default::default(),
778 remote_buffer_listeners: Default::default(),
779 project_id: remote_id,
780 upstream_client,
781 worktree_store: worktree_store.clone(),
782 }),
783 downstream_client: None,
784 opened_buffers: Default::default(),
785 loading_buffers: Default::default(),
786 shared_buffers: Default::default(),
787 worktree_store,
788 }
789 }
790
791 fn as_local(&self) -> Option<&LocalBufferStore> {
792 match &self.state {
793 BufferStoreState::Local(state) => Some(state),
794 _ => None,
795 }
796 }
797
798 fn as_local_mut(&mut self) -> Option<&mut LocalBufferStore> {
799 match &mut self.state {
800 BufferStoreState::Local(state) => Some(state),
801 _ => None,
802 }
803 }
804
805 fn as_remote_mut(&mut self) -> Option<&mut RemoteBufferStore> {
806 match &mut self.state {
807 BufferStoreState::Remote(state) => Some(state),
808 _ => None,
809 }
810 }
811
812 fn as_remote(&self) -> Option<&RemoteBufferStore> {
813 match &self.state {
814 BufferStoreState::Remote(state) => Some(state),
815 _ => None,
816 }
817 }
818
819 pub fn open_buffer(
820 &mut self,
821 project_path: ProjectPath,
822 cx: &mut Context<Self>,
823 ) -> Task<Result<Entity<Buffer>>> {
824 if let Some(buffer) = self.get_by_path(&project_path, cx) {
825 cx.emit(BufferStoreEvent::BufferOpened {
826 buffer: buffer.clone(),
827 project_path,
828 });
829
830 return Task::ready(Ok(buffer));
831 }
832
833 let task = match self.loading_buffers.entry(project_path.clone()) {
834 hash_map::Entry::Occupied(e) => e.get().clone(),
835 hash_map::Entry::Vacant(entry) => {
836 let path = project_path.path.clone();
837 let Some(worktree) = self
838 .worktree_store
839 .read(cx)
840 .worktree_for_id(project_path.worktree_id, cx)
841 else {
842 return Task::ready(Err(anyhow!("no such worktree")));
843 };
844 let load_buffer = match &self.state {
845 BufferStoreState::Local(this) => this.open_buffer(path, worktree, cx),
846 BufferStoreState::Remote(this) => this.open_buffer(path, worktree, cx),
847 };
848
849 entry
850 .insert(
851 cx.spawn(async move |this, cx| {
852 let load_result = load_buffer.await;
853 this.update(cx, |this, cx| {
854 // Record the fact that the buffer is no longer loading.
855 this.loading_buffers.remove(&project_path);
856
857 let buffer = load_result.map_err(Arc::new)?;
858 cx.emit(BufferStoreEvent::BufferOpened {
859 buffer: buffer.clone(),
860 project_path,
861 });
862
863 Ok(buffer)
864 })?
865 })
866 .shared(),
867 )
868 .clone()
869 }
870 };
871
872 cx.background_spawn(async move { task.await.map_err(|e| anyhow!("{e}")) })
873 }
874
875 pub fn create_buffer(&mut self, cx: &mut Context<Self>) -> Task<Result<Entity<Buffer>>> {
876 match &self.state {
877 BufferStoreState::Local(this) => this.create_buffer(cx),
878 BufferStoreState::Remote(this) => this.create_buffer(cx),
879 }
880 }
881
882 pub fn save_buffer(
883 &mut self,
884 buffer: Entity<Buffer>,
885 cx: &mut Context<Self>,
886 ) -> Task<Result<()>> {
887 match &mut self.state {
888 BufferStoreState::Local(this) => this.save_buffer(buffer, cx),
889 BufferStoreState::Remote(this) => this.save_remote_buffer(buffer.clone(), None, cx),
890 }
891 }
892
893 pub fn save_buffer_as(
894 &mut self,
895 buffer: Entity<Buffer>,
896 path: ProjectPath,
897 cx: &mut Context<Self>,
898 ) -> Task<Result<()>> {
899 let old_file = buffer.read(cx).file().cloned();
900 let task = match &self.state {
901 BufferStoreState::Local(this) => this.save_buffer_as(buffer.clone(), path, cx),
902 BufferStoreState::Remote(this) => {
903 this.save_remote_buffer(buffer.clone(), Some(path.to_proto()), cx)
904 }
905 };
906 cx.spawn(async move |this, cx| {
907 task.await?;
908 this.update(cx, |_, cx| {
909 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
910 })
911 })
912 }
913
914 fn add_buffer(&mut self, buffer_entity: Entity<Buffer>, cx: &mut Context<Self>) -> Result<()> {
915 let buffer = buffer_entity.read(cx);
916 let remote_id = buffer.remote_id();
917 let is_remote = buffer.replica_id() != 0;
918 let open_buffer = OpenBuffer::Complete {
919 buffer: buffer_entity.downgrade(),
920 };
921
922 let handle = cx.entity().downgrade();
923 buffer_entity.update(cx, move |_, cx| {
924 cx.on_release(move |buffer, cx| {
925 handle
926 .update(cx, |_, cx| {
927 cx.emit(BufferStoreEvent::BufferDropped(buffer.remote_id()))
928 })
929 .ok();
930 })
931 .detach()
932 });
933
934 match self.opened_buffers.entry(remote_id) {
935 hash_map::Entry::Vacant(entry) => {
936 entry.insert(open_buffer);
937 }
938 hash_map::Entry::Occupied(mut entry) => {
939 if let OpenBuffer::Operations(operations) = entry.get_mut() {
940 buffer_entity.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx));
941 } else if entry.get().upgrade().is_some() {
942 if is_remote {
943 return Ok(());
944 } else {
945 debug_panic!("buffer {} was already registered", remote_id);
946 Err(anyhow!("buffer {} was already registered", remote_id))?;
947 }
948 }
949 entry.insert(open_buffer);
950 }
951 }
952
953 cx.subscribe(&buffer_entity, Self::on_buffer_event).detach();
954 cx.emit(BufferStoreEvent::BufferAdded(buffer_entity));
955 Ok(())
956 }
957
958 pub fn buffers(&self) -> impl '_ + Iterator<Item = Entity<Buffer>> {
959 self.opened_buffers
960 .values()
961 .filter_map(|buffer| buffer.upgrade())
962 }
963
964 pub fn loading_buffers(
965 &self,
966 ) -> impl Iterator<Item = (&ProjectPath, impl Future<Output = Result<Entity<Buffer>>>)> {
967 self.loading_buffers.iter().map(|(path, task)| {
968 let task = task.clone();
969 (path, async move { task.await.map_err(|e| anyhow!("{e}")) })
970 })
971 }
972
973 pub fn buffer_id_for_project_path(&self, project_path: &ProjectPath) -> Option<&BufferId> {
974 self.as_local()
975 .and_then(|state| state.local_buffer_ids_by_path.get(project_path))
976 }
977
978 pub fn get_by_path(&self, path: &ProjectPath, cx: &App) -> Option<Entity<Buffer>> {
979 self.buffers().find_map(|buffer| {
980 let file = File::from_dyn(buffer.read(cx).file())?;
981 if file.worktree_id(cx) == path.worktree_id && file.path == path.path {
982 Some(buffer)
983 } else {
984 None
985 }
986 })
987 }
988
989 pub fn get(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
990 self.opened_buffers.get(&buffer_id)?.upgrade()
991 }
992
993 pub fn get_existing(&self, buffer_id: BufferId) -> Result<Entity<Buffer>> {
994 self.get(buffer_id)
995 .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
996 }
997
998 pub fn get_possibly_incomplete(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
999 self.get(buffer_id).or_else(|| {
1000 self.as_remote()
1001 .and_then(|remote| remote.loading_remote_buffers_by_id.get(&buffer_id).cloned())
1002 })
1003 }
1004
1005 pub fn buffer_version_info(&self, cx: &App) -> (Vec<proto::BufferVersion>, Vec<BufferId>) {
1006 let buffers = self
1007 .buffers()
1008 .map(|buffer| {
1009 let buffer = buffer.read(cx);
1010 proto::BufferVersion {
1011 id: buffer.remote_id().into(),
1012 version: language::proto::serialize_version(&buffer.version),
1013 }
1014 })
1015 .collect();
1016 let incomplete_buffer_ids = self
1017 .as_remote()
1018 .map(|remote| remote.incomplete_buffer_ids())
1019 .unwrap_or_default();
1020 (buffers, incomplete_buffer_ids)
1021 }
1022
1023 pub fn disconnected_from_host(&mut self, cx: &mut App) {
1024 for open_buffer in self.opened_buffers.values_mut() {
1025 if let Some(buffer) = open_buffer.upgrade() {
1026 buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1027 }
1028 }
1029
1030 for buffer in self.buffers() {
1031 buffer.update(cx, |buffer, cx| {
1032 buffer.set_capability(Capability::ReadOnly, cx)
1033 });
1034 }
1035
1036 if let Some(remote) = self.as_remote_mut() {
1037 // Wake up all futures currently waiting on a buffer to get opened,
1038 // to give them a chance to fail now that we've disconnected.
1039 remote.remote_buffer_listeners.clear()
1040 }
1041 }
1042
1043 pub fn shared(&mut self, remote_id: u64, downstream_client: AnyProtoClient, _cx: &mut App) {
1044 self.downstream_client = Some((downstream_client, remote_id));
1045 }
1046
1047 pub fn unshared(&mut self, _cx: &mut Context<Self>) {
1048 self.downstream_client.take();
1049 self.forget_shared_buffers();
1050 }
1051
1052 pub fn discard_incomplete(&mut self) {
1053 self.opened_buffers
1054 .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
1055 }
1056
1057 pub fn find_search_candidates(
1058 &mut self,
1059 query: &SearchQuery,
1060 mut limit: usize,
1061 fs: Arc<dyn Fs>,
1062 cx: &mut Context<Self>,
1063 ) -> Receiver<Entity<Buffer>> {
1064 let (tx, rx) = smol::channel::unbounded();
1065 let mut open_buffers = HashSet::default();
1066 let mut unnamed_buffers = Vec::new();
1067 for handle in self.buffers() {
1068 let buffer = handle.read(cx);
1069 if let Some(entry_id) = buffer.entry_id(cx) {
1070 open_buffers.insert(entry_id);
1071 } else {
1072 limit = limit.saturating_sub(1);
1073 unnamed_buffers.push(handle)
1074 };
1075 }
1076
1077 const MAX_CONCURRENT_BUFFER_OPENS: usize = 64;
1078 let project_paths_rx = self
1079 .worktree_store
1080 .update(cx, |worktree_store, cx| {
1081 worktree_store.find_search_candidates(query.clone(), limit, open_buffers, fs, cx)
1082 })
1083 .chunks(MAX_CONCURRENT_BUFFER_OPENS);
1084
1085 cx.spawn(async move |this, cx| {
1086 for buffer in unnamed_buffers {
1087 tx.send(buffer).await.ok();
1088 }
1089
1090 let mut project_paths_rx = pin!(project_paths_rx);
1091 while let Some(project_paths) = project_paths_rx.next().await {
1092 let buffers = this.update(cx, |this, cx| {
1093 project_paths
1094 .into_iter()
1095 .map(|project_path| this.open_buffer(project_path, cx))
1096 .collect::<Vec<_>>()
1097 })?;
1098 for buffer_task in buffers {
1099 if let Some(buffer) = buffer_task.await.log_err() {
1100 if tx.send(buffer).await.is_err() {
1101 return anyhow::Ok(());
1102 }
1103 }
1104 }
1105 }
1106 anyhow::Ok(())
1107 })
1108 .detach();
1109 rx
1110 }
1111
1112 fn on_buffer_event(
1113 &mut self,
1114 buffer: Entity<Buffer>,
1115 event: &BufferEvent,
1116 cx: &mut Context<Self>,
1117 ) {
1118 match event {
1119 BufferEvent::FileHandleChanged => {
1120 if let Some(local) = self.as_local_mut() {
1121 local.buffer_changed_file(buffer, cx);
1122 }
1123 }
1124 BufferEvent::Reloaded => {
1125 let Some((downstream_client, project_id)) = self.downstream_client.as_ref() else {
1126 return;
1127 };
1128 let buffer = buffer.read(cx);
1129 downstream_client
1130 .send(proto::BufferReloaded {
1131 project_id: *project_id,
1132 buffer_id: buffer.remote_id().to_proto(),
1133 version: serialize_version(&buffer.version()),
1134 mtime: buffer.saved_mtime().map(|t| t.into()),
1135 line_ending: serialize_line_ending(buffer.line_ending()) as i32,
1136 })
1137 .log_err();
1138 }
1139 BufferEvent::LanguageChanged => {}
1140 _ => {}
1141 }
1142 }
1143
1144 pub async fn handle_update_buffer(
1145 this: Entity<Self>,
1146 envelope: TypedEnvelope<proto::UpdateBuffer>,
1147 mut cx: AsyncApp,
1148 ) -> Result<proto::Ack> {
1149 let payload = envelope.payload.clone();
1150 let buffer_id = BufferId::new(payload.buffer_id)?;
1151 let ops = payload
1152 .operations
1153 .into_iter()
1154 .map(language::proto::deserialize_operation)
1155 .collect::<Result<Vec<_>, _>>()?;
1156 this.update(&mut cx, |this, cx| {
1157 match this.opened_buffers.entry(buffer_id) {
1158 hash_map::Entry::Occupied(mut e) => match e.get_mut() {
1159 OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
1160 OpenBuffer::Complete { buffer, .. } => {
1161 if let Some(buffer) = buffer.upgrade() {
1162 buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx));
1163 }
1164 }
1165 },
1166 hash_map::Entry::Vacant(e) => {
1167 e.insert(OpenBuffer::Operations(ops));
1168 }
1169 }
1170 Ok(proto::Ack {})
1171 })?
1172 }
1173
1174 pub fn register_shared_lsp_handle(
1175 &mut self,
1176 peer_id: proto::PeerId,
1177 buffer_id: BufferId,
1178 handle: OpenLspBufferHandle,
1179 ) {
1180 if let Some(shared_buffers) = self.shared_buffers.get_mut(&peer_id) {
1181 if let Some(buffer) = shared_buffers.get_mut(&buffer_id) {
1182 buffer.lsp_handle = Some(handle);
1183 return;
1184 }
1185 }
1186 debug_panic!("tried to register shared lsp handle, but buffer was not shared")
1187 }
1188
1189 pub fn handle_synchronize_buffers(
1190 &mut self,
1191 envelope: TypedEnvelope<proto::SynchronizeBuffers>,
1192 cx: &mut Context<Self>,
1193 client: Arc<Client>,
1194 ) -> Result<proto::SynchronizeBuffersResponse> {
1195 let project_id = envelope.payload.project_id;
1196 let mut response = proto::SynchronizeBuffersResponse {
1197 buffers: Default::default(),
1198 };
1199 let Some(guest_id) = envelope.original_sender_id else {
1200 anyhow::bail!("missing original_sender_id on SynchronizeBuffers request");
1201 };
1202
1203 self.shared_buffers.entry(guest_id).or_default().clear();
1204 for buffer in envelope.payload.buffers {
1205 let buffer_id = BufferId::new(buffer.id)?;
1206 let remote_version = language::proto::deserialize_version(&buffer.version);
1207 if let Some(buffer) = self.get(buffer_id) {
1208 self.shared_buffers
1209 .entry(guest_id)
1210 .or_default()
1211 .entry(buffer_id)
1212 .or_insert_with(|| SharedBuffer {
1213 buffer: buffer.clone(),
1214 lsp_handle: None,
1215 });
1216
1217 let buffer = buffer.read(cx);
1218 response.buffers.push(proto::BufferVersion {
1219 id: buffer_id.into(),
1220 version: language::proto::serialize_version(&buffer.version),
1221 });
1222
1223 let operations = buffer.serialize_ops(Some(remote_version), cx);
1224 let client = client.clone();
1225 if let Some(file) = buffer.file() {
1226 client
1227 .send(proto::UpdateBufferFile {
1228 project_id,
1229 buffer_id: buffer_id.into(),
1230 file: Some(file.to_proto(cx)),
1231 })
1232 .log_err();
1233 }
1234
1235 // TODO(max): do something
1236 // client
1237 // .send(proto::UpdateStagedText {
1238 // project_id,
1239 // buffer_id: buffer_id.into(),
1240 // diff_base: buffer.diff_base().map(ToString::to_string),
1241 // })
1242 // .log_err();
1243
1244 client
1245 .send(proto::BufferReloaded {
1246 project_id,
1247 buffer_id: buffer_id.into(),
1248 version: language::proto::serialize_version(buffer.saved_version()),
1249 mtime: buffer.saved_mtime().map(|time| time.into()),
1250 line_ending: language::proto::serialize_line_ending(buffer.line_ending())
1251 as i32,
1252 })
1253 .log_err();
1254
1255 cx.background_spawn(
1256 async move {
1257 let operations = operations.await;
1258 for chunk in split_operations(operations) {
1259 client
1260 .request(proto::UpdateBuffer {
1261 project_id,
1262 buffer_id: buffer_id.into(),
1263 operations: chunk,
1264 })
1265 .await?;
1266 }
1267 anyhow::Ok(())
1268 }
1269 .log_err(),
1270 )
1271 .detach();
1272 }
1273 }
1274 Ok(response)
1275 }
1276
1277 pub fn handle_create_buffer_for_peer(
1278 &mut self,
1279 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
1280 replica_id: u16,
1281 capability: Capability,
1282 cx: &mut Context<Self>,
1283 ) -> Result<()> {
1284 let Some(remote) = self.as_remote_mut() else {
1285 return Err(anyhow!("buffer store is not a remote"));
1286 };
1287
1288 if let Some(buffer) =
1289 remote.handle_create_buffer_for_peer(envelope, replica_id, capability, cx)?
1290 {
1291 self.add_buffer(buffer, cx)?;
1292 }
1293
1294 Ok(())
1295 }
1296
1297 pub async fn handle_update_buffer_file(
1298 this: Entity<Self>,
1299 envelope: TypedEnvelope<proto::UpdateBufferFile>,
1300 mut cx: AsyncApp,
1301 ) -> Result<()> {
1302 let buffer_id = envelope.payload.buffer_id;
1303 let buffer_id = BufferId::new(buffer_id)?;
1304
1305 this.update(&mut cx, |this, cx| {
1306 let payload = envelope.payload.clone();
1307 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1308 let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
1309 let worktree = this
1310 .worktree_store
1311 .read(cx)
1312 .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
1313 .ok_or_else(|| anyhow!("no such worktree"))?;
1314 let file = File::from_proto(file, worktree, cx)?;
1315 let old_file = buffer.update(cx, |buffer, cx| {
1316 let old_file = buffer.file().cloned();
1317 let new_path = file.path.clone();
1318 buffer.file_updated(Arc::new(file), cx);
1319 if old_file
1320 .as_ref()
1321 .map_or(true, |old| *old.path() != new_path)
1322 {
1323 Some(old_file)
1324 } else {
1325 None
1326 }
1327 });
1328 if let Some(old_file) = old_file {
1329 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
1330 }
1331 }
1332 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1333 downstream_client
1334 .send(proto::UpdateBufferFile {
1335 project_id: *project_id,
1336 buffer_id: buffer_id.into(),
1337 file: envelope.payload.file,
1338 })
1339 .log_err();
1340 }
1341 Ok(())
1342 })?
1343 }
1344
1345 pub async fn handle_save_buffer(
1346 this: Entity<Self>,
1347 envelope: TypedEnvelope<proto::SaveBuffer>,
1348 mut cx: AsyncApp,
1349 ) -> Result<proto::BufferSaved> {
1350 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1351 let (buffer, project_id) = this.update(&mut cx, |this, _| {
1352 anyhow::Ok((
1353 this.get_existing(buffer_id)?,
1354 this.downstream_client
1355 .as_ref()
1356 .map(|(_, project_id)| *project_id)
1357 .context("project is not shared")?,
1358 ))
1359 })??;
1360 buffer
1361 .update(&mut cx, |buffer, _| {
1362 buffer.wait_for_version(deserialize_version(&envelope.payload.version))
1363 })?
1364 .await?;
1365 let buffer_id = buffer.update(&mut cx, |buffer, _| buffer.remote_id())?;
1366
1367 if let Some(new_path) = envelope.payload.new_path {
1368 let new_path = ProjectPath::from_proto(new_path);
1369 this.update(&mut cx, |this, cx| {
1370 this.save_buffer_as(buffer.clone(), new_path, cx)
1371 })?
1372 .await?;
1373 } else {
1374 this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))?
1375 .await?;
1376 }
1377
1378 buffer.update(&mut cx, |buffer, _| proto::BufferSaved {
1379 project_id,
1380 buffer_id: buffer_id.into(),
1381 version: serialize_version(buffer.saved_version()),
1382 mtime: buffer.saved_mtime().map(|time| time.into()),
1383 })
1384 }
1385
1386 pub async fn handle_close_buffer(
1387 this: Entity<Self>,
1388 envelope: TypedEnvelope<proto::CloseBuffer>,
1389 mut cx: AsyncApp,
1390 ) -> Result<()> {
1391 let peer_id = envelope.sender_id;
1392 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1393 this.update(&mut cx, |this, cx| {
1394 if let Some(shared) = this.shared_buffers.get_mut(&peer_id) {
1395 if shared.remove(&buffer_id).is_some() {
1396 cx.emit(BufferStoreEvent::SharedBufferClosed(peer_id, buffer_id));
1397 if shared.is_empty() {
1398 this.shared_buffers.remove(&peer_id);
1399 }
1400 return;
1401 }
1402 }
1403 debug_panic!(
1404 "peer_id {} closed buffer_id {} which was either not open or already closed",
1405 peer_id,
1406 buffer_id
1407 )
1408 })
1409 }
1410
1411 pub async fn handle_buffer_saved(
1412 this: Entity<Self>,
1413 envelope: TypedEnvelope<proto::BufferSaved>,
1414 mut cx: AsyncApp,
1415 ) -> Result<()> {
1416 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1417 let version = deserialize_version(&envelope.payload.version);
1418 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1419 this.update(&mut cx, move |this, cx| {
1420 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1421 buffer.update(cx, |buffer, cx| {
1422 buffer.did_save(version, mtime, cx);
1423 });
1424 }
1425
1426 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1427 downstream_client
1428 .send(proto::BufferSaved {
1429 project_id: *project_id,
1430 buffer_id: buffer_id.into(),
1431 mtime: envelope.payload.mtime,
1432 version: envelope.payload.version,
1433 })
1434 .log_err();
1435 }
1436 })
1437 }
1438
1439 pub async fn handle_buffer_reloaded(
1440 this: Entity<Self>,
1441 envelope: TypedEnvelope<proto::BufferReloaded>,
1442 mut cx: AsyncApp,
1443 ) -> Result<()> {
1444 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1445 let version = deserialize_version(&envelope.payload.version);
1446 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1447 let line_ending = deserialize_line_ending(
1448 proto::LineEnding::from_i32(envelope.payload.line_ending)
1449 .ok_or_else(|| anyhow!("missing line ending"))?,
1450 );
1451 this.update(&mut cx, |this, cx| {
1452 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1453 buffer.update(cx, |buffer, cx| {
1454 buffer.did_reload(version, line_ending, mtime, cx);
1455 });
1456 }
1457
1458 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1459 downstream_client
1460 .send(proto::BufferReloaded {
1461 project_id: *project_id,
1462 buffer_id: buffer_id.into(),
1463 mtime: envelope.payload.mtime,
1464 version: envelope.payload.version,
1465 line_ending: envelope.payload.line_ending,
1466 })
1467 .log_err();
1468 }
1469 })
1470 }
1471
1472 pub fn reload_buffers(
1473 &self,
1474 buffers: HashSet<Entity<Buffer>>,
1475 push_to_history: bool,
1476 cx: &mut Context<Self>,
1477 ) -> Task<Result<ProjectTransaction>> {
1478 if buffers.is_empty() {
1479 return Task::ready(Ok(ProjectTransaction::default()));
1480 }
1481 match &self.state {
1482 BufferStoreState::Local(this) => this.reload_buffers(buffers, push_to_history, cx),
1483 BufferStoreState::Remote(this) => this.reload_buffers(buffers, push_to_history, cx),
1484 }
1485 }
1486
1487 async fn handle_reload_buffers(
1488 this: Entity<Self>,
1489 envelope: TypedEnvelope<proto::ReloadBuffers>,
1490 mut cx: AsyncApp,
1491 ) -> Result<proto::ReloadBuffersResponse> {
1492 let sender_id = envelope.original_sender_id().unwrap_or_default();
1493 let reload = this.update(&mut cx, |this, cx| {
1494 let mut buffers = HashSet::default();
1495 for buffer_id in &envelope.payload.buffer_ids {
1496 let buffer_id = BufferId::new(*buffer_id)?;
1497 buffers.insert(this.get_existing(buffer_id)?);
1498 }
1499 Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
1500 })??;
1501
1502 let project_transaction = reload.await?;
1503 let project_transaction = this.update(&mut cx, |this, cx| {
1504 this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
1505 })?;
1506 Ok(proto::ReloadBuffersResponse {
1507 transaction: Some(project_transaction),
1508 })
1509 }
1510
1511 pub fn create_buffer_for_peer(
1512 &mut self,
1513 buffer: &Entity<Buffer>,
1514 peer_id: proto::PeerId,
1515 cx: &mut Context<Self>,
1516 ) -> Task<Result<()>> {
1517 let buffer_id = buffer.read(cx).remote_id();
1518 let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
1519 if shared_buffers.contains_key(&buffer_id) {
1520 return Task::ready(Ok(()));
1521 }
1522 shared_buffers.insert(
1523 buffer_id,
1524 SharedBuffer {
1525 buffer: buffer.clone(),
1526 lsp_handle: None,
1527 },
1528 );
1529
1530 let Some((client, project_id)) = self.downstream_client.clone() else {
1531 return Task::ready(Ok(()));
1532 };
1533
1534 cx.spawn(async move |this, cx| {
1535 let Some(buffer) = this.update(cx, |this, _| this.get(buffer_id))? else {
1536 return anyhow::Ok(());
1537 };
1538
1539 let operations = buffer.update(cx, |b, cx| b.serialize_ops(None, cx))?;
1540 let operations = operations.await;
1541 let state = buffer.update(cx, |buffer, cx| buffer.to_proto(cx))?;
1542
1543 let initial_state = proto::CreateBufferForPeer {
1544 project_id,
1545 peer_id: Some(peer_id),
1546 variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1547 };
1548
1549 if client.send(initial_state).log_err().is_some() {
1550 let client = client.clone();
1551 cx.background_spawn(async move {
1552 let mut chunks = split_operations(operations).peekable();
1553 while let Some(chunk) = chunks.next() {
1554 let is_last = chunks.peek().is_none();
1555 client.send(proto::CreateBufferForPeer {
1556 project_id,
1557 peer_id: Some(peer_id),
1558 variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
1559 proto::BufferChunk {
1560 buffer_id: buffer_id.into(),
1561 operations: chunk,
1562 is_last,
1563 },
1564 )),
1565 })?;
1566 }
1567 anyhow::Ok(())
1568 })
1569 .await
1570 .log_err();
1571 }
1572 Ok(())
1573 })
1574 }
1575
1576 pub fn forget_shared_buffers(&mut self) {
1577 self.shared_buffers.clear();
1578 }
1579
1580 pub fn forget_shared_buffers_for(&mut self, peer_id: &proto::PeerId) {
1581 self.shared_buffers.remove(peer_id);
1582 }
1583
1584 pub fn update_peer_id(&mut self, old_peer_id: &proto::PeerId, new_peer_id: proto::PeerId) {
1585 if let Some(buffers) = self.shared_buffers.remove(old_peer_id) {
1586 self.shared_buffers.insert(new_peer_id, buffers);
1587 }
1588 }
1589
1590 pub fn has_shared_buffers(&self) -> bool {
1591 !self.shared_buffers.is_empty()
1592 }
1593
1594 pub fn create_local_buffer(
1595 &mut self,
1596 text: &str,
1597 language: Option<Arc<Language>>,
1598 cx: &mut Context<Self>,
1599 ) -> Entity<Buffer> {
1600 let buffer = cx.new(|cx| {
1601 Buffer::local(text, cx)
1602 .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1603 });
1604
1605 self.add_buffer(buffer.clone(), cx).log_err();
1606 let buffer_id = buffer.read(cx).remote_id();
1607
1608 let this = self
1609 .as_local_mut()
1610 .expect("local-only method called in a non-local context");
1611 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1612 this.local_buffer_ids_by_path.insert(
1613 ProjectPath {
1614 worktree_id: file.worktree_id(cx),
1615 path: file.path.clone(),
1616 },
1617 buffer_id,
1618 );
1619
1620 if let Some(entry_id) = file.entry_id {
1621 this.local_buffer_ids_by_entry_id
1622 .insert(entry_id, buffer_id);
1623 }
1624 }
1625 buffer
1626 }
1627
1628 pub fn deserialize_project_transaction(
1629 &mut self,
1630 message: proto::ProjectTransaction,
1631 push_to_history: bool,
1632 cx: &mut Context<Self>,
1633 ) -> Task<Result<ProjectTransaction>> {
1634 if let Some(this) = self.as_remote_mut() {
1635 this.deserialize_project_transaction(message, push_to_history, cx)
1636 } else {
1637 debug_panic!("not a remote buffer store");
1638 Task::ready(Err(anyhow!("not a remote buffer store")))
1639 }
1640 }
1641
1642 pub fn wait_for_remote_buffer(
1643 &mut self,
1644 id: BufferId,
1645 cx: &mut Context<BufferStore>,
1646 ) -> Task<Result<Entity<Buffer>>> {
1647 if let Some(this) = self.as_remote_mut() {
1648 this.wait_for_remote_buffer(id, cx)
1649 } else {
1650 debug_panic!("not a remote buffer store");
1651 Task::ready(Err(anyhow!("not a remote buffer store")))
1652 }
1653 }
1654
1655 pub fn serialize_project_transaction_for_peer(
1656 &mut self,
1657 project_transaction: ProjectTransaction,
1658 peer_id: proto::PeerId,
1659 cx: &mut Context<Self>,
1660 ) -> proto::ProjectTransaction {
1661 let mut serialized_transaction = proto::ProjectTransaction {
1662 buffer_ids: Default::default(),
1663 transactions: Default::default(),
1664 };
1665 for (buffer, transaction) in project_transaction.0 {
1666 self.create_buffer_for_peer(&buffer, peer_id, cx)
1667 .detach_and_log_err(cx);
1668 serialized_transaction
1669 .buffer_ids
1670 .push(buffer.read(cx).remote_id().into());
1671 serialized_transaction
1672 .transactions
1673 .push(language::proto::serialize_transaction(&transaction));
1674 }
1675 serialized_transaction
1676 }
1677}
1678
1679impl OpenBuffer {
1680 fn upgrade(&self) -> Option<Entity<Buffer>> {
1681 match self {
1682 OpenBuffer::Complete { buffer, .. } => buffer.upgrade(),
1683 OpenBuffer::Operations(_) => None,
1684 }
1685 }
1686}
1687
1688fn is_not_found_error(error: &anyhow::Error) -> bool {
1689 error
1690 .root_cause()
1691 .downcast_ref::<io::Error>()
1692 .is_some_and(|err| err.kind() == io::ErrorKind::NotFound)
1693}