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