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_buffer = worktree.update(cx, |worktree, cx| {
621 let load_file = worktree.load_file(path.as_ref(), cx);
622 let reservation = cx.reserve_entity();
623 let buffer_id = BufferId::from(reservation.entity_id().as_non_zero_u64());
624 cx.spawn(async move |_, cx| {
625 let loaded = load_file.await?;
626 let text_buffer = cx
627 .background_spawn(async move {
628 text::Buffer::new(ReplicaId::LOCAL, buffer_id, loaded.text)
629 })
630 .await;
631 cx.insert_entity(reservation, |_| {
632 Buffer::build(text_buffer, Some(loaded.file), Capability::ReadWrite)
633 })
634 })
635 });
636
637 cx.spawn(async move |this, cx| {
638 let buffer = match load_buffer.await {
639 Ok(buffer) => Ok(buffer),
640 Err(error) if is_not_found_error(&error) => cx.new(|cx| {
641 let buffer_id = BufferId::from(cx.entity_id().as_non_zero_u64());
642 let text_buffer = text::Buffer::new(ReplicaId::LOCAL, buffer_id, "");
643 Buffer::build(
644 text_buffer,
645 Some(Arc::new(File {
646 worktree,
647 path,
648 disk_state: DiskState::New,
649 entry_id: None,
650 is_local: true,
651 is_private: false,
652 })),
653 Capability::ReadWrite,
654 )
655 }),
656 Err(e) => Err(e),
657 }?;
658 this.update(cx, |this, cx| {
659 this.add_buffer(buffer.clone(), cx)?;
660 let buffer_id = buffer.read(cx).remote_id();
661 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
662 this.path_to_buffer_id.insert(
663 ProjectPath {
664 worktree_id: file.worktree_id(cx),
665 path: file.path.clone(),
666 },
667 buffer_id,
668 );
669 let this = this.as_local_mut().unwrap();
670 if let Some(entry_id) = file.entry_id {
671 this.local_buffer_ids_by_entry_id
672 .insert(entry_id, buffer_id);
673 }
674 }
675
676 anyhow::Ok(())
677 })??;
678
679 Ok(buffer)
680 })
681 }
682
683 fn create_buffer(
684 &self,
685 project_searchable: bool,
686 cx: &mut Context<BufferStore>,
687 ) -> Task<Result<Entity<Buffer>>> {
688 cx.spawn(async move |buffer_store, cx| {
689 let buffer =
690 cx.new(|cx| Buffer::local("", cx).with_language(language::PLAIN_TEXT.clone(), cx))?;
691 buffer_store.update(cx, |buffer_store, cx| {
692 buffer_store.add_buffer(buffer.clone(), cx).log_err();
693 if !project_searchable {
694 buffer_store
695 .non_searchable_buffers
696 .insert(buffer.read(cx).remote_id());
697 }
698 })?;
699 Ok(buffer)
700 })
701 }
702
703 fn reload_buffers(
704 &self,
705 buffers: HashSet<Entity<Buffer>>,
706 push_to_history: bool,
707 cx: &mut Context<BufferStore>,
708 ) -> Task<Result<ProjectTransaction>> {
709 cx.spawn(async move |_, cx| {
710 let mut project_transaction = ProjectTransaction::default();
711 for buffer in buffers {
712 let transaction = buffer.update(cx, |buffer, cx| buffer.reload(cx))?.await?;
713 buffer.update(cx, |buffer, cx| {
714 if let Some(transaction) = transaction {
715 if !push_to_history {
716 buffer.forget_transaction(transaction.id);
717 }
718 project_transaction.0.insert(cx.entity(), transaction);
719 }
720 })?;
721 }
722
723 Ok(project_transaction)
724 })
725 }
726}
727
728impl BufferStore {
729 pub fn init(client: &AnyProtoClient) {
730 client.add_entity_message_handler(Self::handle_buffer_reloaded);
731 client.add_entity_message_handler(Self::handle_buffer_saved);
732 client.add_entity_message_handler(Self::handle_update_buffer_file);
733 client.add_entity_request_handler(Self::handle_save_buffer);
734 client.add_entity_request_handler(Self::handle_reload_buffers);
735 }
736
737 /// Creates a buffer store, optionally retaining its buffers.
738 pub fn local(worktree_store: Entity<WorktreeStore>, cx: &mut Context<Self>) -> Self {
739 Self {
740 state: BufferStoreState::Local(LocalBufferStore {
741 local_buffer_ids_by_entry_id: Default::default(),
742 worktree_store: worktree_store.clone(),
743 _subscription: cx.subscribe(&worktree_store, |this, _, event, cx| {
744 if let WorktreeStoreEvent::WorktreeAdded(worktree) = event {
745 let this = this.as_local_mut().unwrap();
746 this.subscribe_to_worktree(worktree, cx);
747 }
748 }),
749 }),
750 downstream_client: None,
751 opened_buffers: Default::default(),
752 path_to_buffer_id: Default::default(),
753 shared_buffers: Default::default(),
754 loading_buffers: Default::default(),
755 non_searchable_buffers: Default::default(),
756 worktree_store,
757 }
758 }
759
760 pub fn remote(
761 worktree_store: Entity<WorktreeStore>,
762 upstream_client: AnyProtoClient,
763 remote_id: u64,
764 _cx: &mut Context<Self>,
765 ) -> Self {
766 Self {
767 state: BufferStoreState::Remote(RemoteBufferStore {
768 shared_with_me: Default::default(),
769 loading_remote_buffers_by_id: Default::default(),
770 remote_buffer_listeners: Default::default(),
771 project_id: remote_id,
772 upstream_client,
773 worktree_store: worktree_store.clone(),
774 }),
775 downstream_client: None,
776 opened_buffers: Default::default(),
777 path_to_buffer_id: Default::default(),
778 loading_buffers: Default::default(),
779 shared_buffers: Default::default(),
780 non_searchable_buffers: Default::default(),
781 worktree_store,
782 }
783 }
784
785 fn as_local_mut(&mut self) -> Option<&mut LocalBufferStore> {
786 match &mut self.state {
787 BufferStoreState::Local(state) => Some(state),
788 _ => None,
789 }
790 }
791
792 fn as_remote_mut(&mut self) -> Option<&mut RemoteBufferStore> {
793 match &mut self.state {
794 BufferStoreState::Remote(state) => Some(state),
795 _ => None,
796 }
797 }
798
799 fn as_remote(&self) -> Option<&RemoteBufferStore> {
800 match &self.state {
801 BufferStoreState::Remote(state) => Some(state),
802 _ => None,
803 }
804 }
805
806 pub fn open_buffer(
807 &mut self,
808 project_path: ProjectPath,
809 cx: &mut Context<Self>,
810 ) -> Task<Result<Entity<Buffer>>> {
811 if let Some(buffer) = self.get_by_path(&project_path) {
812 cx.emit(BufferStoreEvent::BufferOpened {
813 buffer: buffer.clone(),
814 project_path,
815 });
816
817 return Task::ready(Ok(buffer));
818 }
819
820 let task = match self.loading_buffers.entry(project_path.clone()) {
821 hash_map::Entry::Occupied(e) => e.get().clone(),
822 hash_map::Entry::Vacant(entry) => {
823 let path = project_path.path.clone();
824 let Some(worktree) = self
825 .worktree_store
826 .read(cx)
827 .worktree_for_id(project_path.worktree_id, cx)
828 else {
829 return Task::ready(Err(anyhow!("no such worktree")));
830 };
831 let load_buffer = match &self.state {
832 BufferStoreState::Local(this) => this.open_buffer(path, worktree, cx),
833 BufferStoreState::Remote(this) => this.open_buffer(path, worktree, cx),
834 };
835
836 entry
837 .insert(
838 cx.spawn(async move |this, cx| {
839 let load_result = load_buffer.await;
840 this.update(cx, |this, cx| {
841 // Record the fact that the buffer is no longer loading.
842 this.loading_buffers.remove(&project_path);
843
844 let buffer = load_result.map_err(Arc::new)?;
845 cx.emit(BufferStoreEvent::BufferOpened {
846 buffer: buffer.clone(),
847 project_path,
848 });
849
850 Ok(buffer)
851 })?
852 })
853 .shared(),
854 )
855 .clone()
856 }
857 };
858
859 cx.background_spawn(async move {
860 task.await.map_err(|e| {
861 if e.error_code() != ErrorCode::Internal {
862 anyhow!(e.error_code())
863 } else {
864 anyhow!("{e}")
865 }
866 })
867 })
868 }
869
870 pub fn create_buffer(
871 &mut self,
872 project_searchable: bool,
873 cx: &mut Context<Self>,
874 ) -> Task<Result<Entity<Buffer>>> {
875 match &self.state {
876 BufferStoreState::Local(this) => this.create_buffer(project_searchable, cx),
877 BufferStoreState::Remote(this) => this.create_buffer(project_searchable, cx),
878 }
879 }
880
881 pub fn save_buffer(
882 &mut self,
883 buffer: Entity<Buffer>,
884 cx: &mut Context<Self>,
885 ) -> Task<Result<()>> {
886 match &mut self.state {
887 BufferStoreState::Local(this) => this.save_buffer(buffer, cx),
888 BufferStoreState::Remote(this) => this.save_remote_buffer(buffer, None, cx),
889 }
890 }
891
892 pub fn save_buffer_as(
893 &mut self,
894 buffer: Entity<Buffer>,
895 path: ProjectPath,
896 cx: &mut Context<Self>,
897 ) -> Task<Result<()>> {
898 let old_file = buffer.read(cx).file().cloned();
899 let task = match &self.state {
900 BufferStoreState::Local(this) => this.save_buffer_as(buffer.clone(), path, cx),
901 BufferStoreState::Remote(this) => {
902 this.save_remote_buffer(buffer.clone(), Some(path.to_proto()), cx)
903 }
904 };
905 cx.spawn(async move |this, cx| {
906 task.await?;
907 this.update(cx, |_, cx| {
908 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
909 })
910 })
911 }
912
913 fn add_buffer(&mut self, buffer_entity: Entity<Buffer>, cx: &mut Context<Self>) -> Result<()> {
914 let buffer = buffer_entity.read(cx);
915 let remote_id = buffer.remote_id();
916 let path = File::from_dyn(buffer.file()).map(|file| ProjectPath {
917 path: file.path.clone(),
918 worktree_id: file.worktree_id(cx),
919 });
920 let is_remote = buffer.replica_id().is_remote();
921 let open_buffer = OpenBuffer::Complete {
922 buffer: buffer_entity.downgrade(),
923 };
924
925 let handle = cx.entity().downgrade();
926 buffer_entity.update(cx, move |_, cx| {
927 cx.on_release(move |buffer, cx| {
928 handle
929 .update(cx, |_, cx| {
930 cx.emit(BufferStoreEvent::BufferDropped(buffer.remote_id()))
931 })
932 .ok();
933 })
934 .detach()
935 });
936 let _expect_path_to_exist;
937 match self.opened_buffers.entry(remote_id) {
938 hash_map::Entry::Vacant(entry) => {
939 entry.insert(open_buffer);
940 _expect_path_to_exist = false;
941 }
942 hash_map::Entry::Occupied(mut entry) => {
943 if let OpenBuffer::Operations(operations) = entry.get_mut() {
944 buffer_entity.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx));
945 } else if entry.get().upgrade().is_some() {
946 if is_remote {
947 return Ok(());
948 } else {
949 debug_panic!("buffer {remote_id} was already registered");
950 anyhow::bail!("buffer {remote_id} was already registered");
951 }
952 }
953 entry.insert(open_buffer);
954 _expect_path_to_exist = true;
955 }
956 }
957
958 if let Some(path) = path {
959 self.path_to_buffer_id.insert(path, remote_id);
960 }
961
962 cx.subscribe(&buffer_entity, Self::on_buffer_event).detach();
963 cx.emit(BufferStoreEvent::BufferAdded(buffer_entity));
964 Ok(())
965 }
966
967 pub fn buffers(&self) -> impl '_ + Iterator<Item = Entity<Buffer>> {
968 self.opened_buffers
969 .values()
970 .filter_map(|buffer| buffer.upgrade())
971 }
972
973 pub(crate) fn is_searchable(&self, id: &BufferId) -> bool {
974 !self.non_searchable_buffers.contains(&id)
975 }
976
977 pub fn loading_buffers(
978 &self,
979 ) -> impl Iterator<Item = (&ProjectPath, impl Future<Output = Result<Entity<Buffer>>>)> {
980 self.loading_buffers.iter().map(|(path, task)| {
981 let task = task.clone();
982 (path, async move {
983 task.await.map_err(|e| {
984 if e.error_code() != ErrorCode::Internal {
985 anyhow!(e.error_code())
986 } else {
987 anyhow!("{e}")
988 }
989 })
990 })
991 })
992 }
993
994 pub fn buffer_id_for_project_path(&self, project_path: &ProjectPath) -> Option<&BufferId> {
995 self.path_to_buffer_id.get(project_path)
996 }
997
998 pub fn get_by_path(&self, path: &ProjectPath) -> Option<Entity<Buffer>> {
999 self.path_to_buffer_id
1000 .get(path)
1001 .and_then(|buffer_id| self.get(*buffer_id))
1002 }
1003
1004 pub fn get(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
1005 self.opened_buffers.get(&buffer_id)?.upgrade()
1006 }
1007
1008 pub fn get_existing(&self, buffer_id: BufferId) -> Result<Entity<Buffer>> {
1009 self.get(buffer_id)
1010 .with_context(|| format!("unknown buffer id {buffer_id}"))
1011 }
1012
1013 pub fn get_possibly_incomplete(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
1014 self.get(buffer_id).or_else(|| {
1015 self.as_remote()
1016 .and_then(|remote| remote.loading_remote_buffers_by_id.get(&buffer_id).cloned())
1017 })
1018 }
1019
1020 pub fn buffer_version_info(&self, cx: &App) -> (Vec<proto::BufferVersion>, Vec<BufferId>) {
1021 let buffers = self
1022 .buffers()
1023 .map(|buffer| {
1024 let buffer = buffer.read(cx);
1025 proto::BufferVersion {
1026 id: buffer.remote_id().into(),
1027 version: language::proto::serialize_version(&buffer.version),
1028 }
1029 })
1030 .collect();
1031 let incomplete_buffer_ids = self
1032 .as_remote()
1033 .map(|remote| remote.incomplete_buffer_ids())
1034 .unwrap_or_default();
1035 (buffers, incomplete_buffer_ids)
1036 }
1037
1038 pub fn disconnected_from_host(&mut self, cx: &mut App) {
1039 for open_buffer in self.opened_buffers.values_mut() {
1040 if let Some(buffer) = open_buffer.upgrade() {
1041 buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1042 }
1043 }
1044
1045 for buffer in self.buffers() {
1046 buffer.update(cx, |buffer, cx| {
1047 buffer.set_capability(Capability::ReadOnly, cx)
1048 });
1049 }
1050
1051 if let Some(remote) = self.as_remote_mut() {
1052 // Wake up all futures currently waiting on a buffer to get opened,
1053 // to give them a chance to fail now that we've disconnected.
1054 remote.remote_buffer_listeners.clear()
1055 }
1056 }
1057
1058 pub fn shared(&mut self, remote_id: u64, downstream_client: AnyProtoClient, _cx: &mut App) {
1059 self.downstream_client = Some((downstream_client, remote_id));
1060 }
1061
1062 pub fn unshared(&mut self, _cx: &mut Context<Self>) {
1063 self.downstream_client.take();
1064 self.forget_shared_buffers();
1065 }
1066
1067 pub fn discard_incomplete(&mut self) {
1068 self.opened_buffers
1069 .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
1070 }
1071
1072 fn buffer_changed_file(&mut self, buffer: Entity<Buffer>, cx: &mut App) -> Option<()> {
1073 let file = File::from_dyn(buffer.read(cx).file())?;
1074
1075 let remote_id = buffer.read(cx).remote_id();
1076 if let Some(entry_id) = file.entry_id {
1077 if let Some(local) = self.as_local_mut() {
1078 match local.local_buffer_ids_by_entry_id.get(&entry_id) {
1079 Some(_) => {
1080 return None;
1081 }
1082 None => {
1083 local
1084 .local_buffer_ids_by_entry_id
1085 .insert(entry_id, remote_id);
1086 }
1087 }
1088 }
1089 self.path_to_buffer_id.insert(
1090 ProjectPath {
1091 worktree_id: file.worktree_id(cx),
1092 path: file.path.clone(),
1093 },
1094 remote_id,
1095 );
1096 };
1097
1098 Some(())
1099 }
1100
1101 fn on_buffer_event(
1102 &mut self,
1103 buffer: Entity<Buffer>,
1104 event: &BufferEvent,
1105 cx: &mut Context<Self>,
1106 ) {
1107 match event {
1108 BufferEvent::FileHandleChanged => {
1109 self.buffer_changed_file(buffer, cx);
1110 }
1111 BufferEvent::Reloaded => {
1112 let Some((downstream_client, project_id)) = self.downstream_client.as_ref() else {
1113 return;
1114 };
1115 let buffer = buffer.read(cx);
1116 downstream_client
1117 .send(proto::BufferReloaded {
1118 project_id: *project_id,
1119 buffer_id: buffer.remote_id().to_proto(),
1120 version: serialize_version(&buffer.version()),
1121 mtime: buffer.saved_mtime().map(|t| t.into()),
1122 line_ending: serialize_line_ending(buffer.line_ending()) as i32,
1123 })
1124 .log_err();
1125 }
1126 BufferEvent::LanguageChanged => {}
1127 _ => {}
1128 }
1129 }
1130
1131 pub async fn handle_update_buffer(
1132 this: Entity<Self>,
1133 envelope: TypedEnvelope<proto::UpdateBuffer>,
1134 mut cx: AsyncApp,
1135 ) -> Result<proto::Ack> {
1136 let payload = envelope.payload;
1137 let buffer_id = BufferId::new(payload.buffer_id)?;
1138 let ops = payload
1139 .operations
1140 .into_iter()
1141 .map(language::proto::deserialize_operation)
1142 .collect::<Result<Vec<_>, _>>()?;
1143 this.update(&mut cx, |this, cx| {
1144 match this.opened_buffers.entry(buffer_id) {
1145 hash_map::Entry::Occupied(mut e) => match e.get_mut() {
1146 OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
1147 OpenBuffer::Complete { buffer, .. } => {
1148 if let Some(buffer) = buffer.upgrade() {
1149 buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx));
1150 }
1151 }
1152 },
1153 hash_map::Entry::Vacant(e) => {
1154 e.insert(OpenBuffer::Operations(ops));
1155 }
1156 }
1157 Ok(proto::Ack {})
1158 })?
1159 }
1160
1161 pub fn register_shared_lsp_handle(
1162 &mut self,
1163 peer_id: proto::PeerId,
1164 buffer_id: BufferId,
1165 handle: OpenLspBufferHandle,
1166 ) {
1167 if let Some(shared_buffers) = self.shared_buffers.get_mut(&peer_id)
1168 && let Some(buffer) = shared_buffers.get_mut(&buffer_id)
1169 {
1170 buffer.lsp_handle = Some(handle);
1171 return;
1172 }
1173 debug_panic!("tried to register shared lsp handle, but buffer was not shared")
1174 }
1175
1176 pub fn handle_synchronize_buffers(
1177 &mut self,
1178 envelope: TypedEnvelope<proto::SynchronizeBuffers>,
1179 cx: &mut Context<Self>,
1180 client: Arc<Client>,
1181 ) -> Result<proto::SynchronizeBuffersResponse> {
1182 let project_id = envelope.payload.project_id;
1183 let mut response = proto::SynchronizeBuffersResponse {
1184 buffers: Default::default(),
1185 };
1186 let Some(guest_id) = envelope.original_sender_id else {
1187 anyhow::bail!("missing original_sender_id on SynchronizeBuffers request");
1188 };
1189
1190 self.shared_buffers.entry(guest_id).or_default().clear();
1191 for buffer in envelope.payload.buffers {
1192 let buffer_id = BufferId::new(buffer.id)?;
1193 let remote_version = language::proto::deserialize_version(&buffer.version);
1194 if let Some(buffer) = self.get(buffer_id) {
1195 self.shared_buffers
1196 .entry(guest_id)
1197 .or_default()
1198 .entry(buffer_id)
1199 .or_insert_with(|| SharedBuffer {
1200 buffer: buffer.clone(),
1201 lsp_handle: None,
1202 });
1203
1204 let buffer = buffer.read(cx);
1205 response.buffers.push(proto::BufferVersion {
1206 id: buffer_id.into(),
1207 version: language::proto::serialize_version(&buffer.version),
1208 });
1209
1210 let operations = buffer.serialize_ops(Some(remote_version), cx);
1211 let client = client.clone();
1212 if let Some(file) = buffer.file() {
1213 client
1214 .send(proto::UpdateBufferFile {
1215 project_id,
1216 buffer_id: buffer_id.into(),
1217 file: Some(file.to_proto(cx)),
1218 })
1219 .log_err();
1220 }
1221
1222 // TODO(max): do something
1223 // client
1224 // .send(proto::UpdateStagedText {
1225 // project_id,
1226 // buffer_id: buffer_id.into(),
1227 // diff_base: buffer.diff_base().map(ToString::to_string),
1228 // })
1229 // .log_err();
1230
1231 client
1232 .send(proto::BufferReloaded {
1233 project_id,
1234 buffer_id: buffer_id.into(),
1235 version: language::proto::serialize_version(buffer.saved_version()),
1236 mtime: buffer.saved_mtime().map(|time| time.into()),
1237 line_ending: language::proto::serialize_line_ending(buffer.line_ending())
1238 as i32,
1239 })
1240 .log_err();
1241
1242 cx.background_spawn(
1243 async move {
1244 let operations = operations.await;
1245 for chunk in split_operations(operations) {
1246 client
1247 .request(proto::UpdateBuffer {
1248 project_id,
1249 buffer_id: buffer_id.into(),
1250 operations: chunk,
1251 })
1252 .await?;
1253 }
1254 anyhow::Ok(())
1255 }
1256 .log_err(),
1257 )
1258 .detach();
1259 }
1260 }
1261 Ok(response)
1262 }
1263
1264 pub fn handle_create_buffer_for_peer(
1265 &mut self,
1266 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
1267 replica_id: ReplicaId,
1268 capability: Capability,
1269 cx: &mut Context<Self>,
1270 ) -> Result<()> {
1271 let remote = self
1272 .as_remote_mut()
1273 .context("buffer store is not a remote")?;
1274
1275 if let Some(buffer) =
1276 remote.handle_create_buffer_for_peer(envelope, replica_id, capability, cx)?
1277 {
1278 self.add_buffer(buffer, cx)?;
1279 }
1280
1281 Ok(())
1282 }
1283
1284 pub async fn handle_update_buffer_file(
1285 this: Entity<Self>,
1286 envelope: TypedEnvelope<proto::UpdateBufferFile>,
1287 mut cx: AsyncApp,
1288 ) -> Result<()> {
1289 let buffer_id = envelope.payload.buffer_id;
1290 let buffer_id = BufferId::new(buffer_id)?;
1291
1292 this.update(&mut cx, |this, cx| {
1293 let payload = envelope.payload.clone();
1294 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1295 let file = payload.file.context("invalid file")?;
1296 let worktree = this
1297 .worktree_store
1298 .read(cx)
1299 .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
1300 .context("no such worktree")?;
1301 let file = File::from_proto(file, worktree, cx)?;
1302 let old_file = buffer.update(cx, |buffer, cx| {
1303 let old_file = buffer.file().cloned();
1304 let new_path = file.path.clone();
1305
1306 buffer.file_updated(Arc::new(file), cx);
1307 if old_file.as_ref().is_none_or(|old| *old.path() != new_path) {
1308 Some(old_file)
1309 } else {
1310 None
1311 }
1312 });
1313 if let Some(old_file) = old_file {
1314 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
1315 }
1316 }
1317 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1318 downstream_client
1319 .send(proto::UpdateBufferFile {
1320 project_id: *project_id,
1321 buffer_id: buffer_id.into(),
1322 file: envelope.payload.file,
1323 })
1324 .log_err();
1325 }
1326 Ok(())
1327 })?
1328 }
1329
1330 pub async fn handle_save_buffer(
1331 this: Entity<Self>,
1332 envelope: TypedEnvelope<proto::SaveBuffer>,
1333 mut cx: AsyncApp,
1334 ) -> Result<proto::BufferSaved> {
1335 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1336 let (buffer, project_id) = this.read_with(&cx, |this, _| {
1337 anyhow::Ok((
1338 this.get_existing(buffer_id)?,
1339 this.downstream_client
1340 .as_ref()
1341 .map(|(_, project_id)| *project_id)
1342 .context("project is not shared")?,
1343 ))
1344 })??;
1345 buffer
1346 .update(&mut cx, |buffer, _| {
1347 buffer.wait_for_version(deserialize_version(&envelope.payload.version))
1348 })?
1349 .await?;
1350 let buffer_id = buffer.read_with(&cx, |buffer, _| buffer.remote_id())?;
1351
1352 if let Some(new_path) = envelope.payload.new_path
1353 && let Some(new_path) = ProjectPath::from_proto(new_path)
1354 {
1355 this.update(&mut cx, |this, cx| {
1356 this.save_buffer_as(buffer.clone(), new_path, cx)
1357 })?
1358 .await?;
1359 } else {
1360 this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))?
1361 .await?;
1362 }
1363
1364 buffer.read_with(&cx, |buffer, _| proto::BufferSaved {
1365 project_id,
1366 buffer_id: buffer_id.into(),
1367 version: serialize_version(buffer.saved_version()),
1368 mtime: buffer.saved_mtime().map(|time| time.into()),
1369 })
1370 }
1371
1372 pub async fn handle_close_buffer(
1373 this: Entity<Self>,
1374 envelope: TypedEnvelope<proto::CloseBuffer>,
1375 mut cx: AsyncApp,
1376 ) -> Result<()> {
1377 let peer_id = envelope.sender_id;
1378 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1379 this.update(&mut cx, |this, cx| {
1380 if let Some(shared) = this.shared_buffers.get_mut(&peer_id)
1381 && shared.remove(&buffer_id).is_some()
1382 {
1383 cx.emit(BufferStoreEvent::SharedBufferClosed(peer_id, buffer_id));
1384 if shared.is_empty() {
1385 this.shared_buffers.remove(&peer_id);
1386 }
1387 return;
1388 }
1389 debug_panic!(
1390 "peer_id {} closed buffer_id {} which was either not open or already closed",
1391 peer_id,
1392 buffer_id
1393 )
1394 })
1395 }
1396
1397 pub async fn handle_buffer_saved(
1398 this: Entity<Self>,
1399 envelope: TypedEnvelope<proto::BufferSaved>,
1400 mut cx: AsyncApp,
1401 ) -> Result<()> {
1402 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1403 let version = deserialize_version(&envelope.payload.version);
1404 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1405 this.update(&mut cx, move |this, cx| {
1406 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1407 buffer.update(cx, |buffer, cx| {
1408 buffer.did_save(version, mtime, cx);
1409 });
1410 }
1411
1412 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1413 downstream_client
1414 .send(proto::BufferSaved {
1415 project_id: *project_id,
1416 buffer_id: buffer_id.into(),
1417 mtime: envelope.payload.mtime,
1418 version: envelope.payload.version,
1419 })
1420 .log_err();
1421 }
1422 })
1423 }
1424
1425 pub async fn handle_buffer_reloaded(
1426 this: Entity<Self>,
1427 envelope: TypedEnvelope<proto::BufferReloaded>,
1428 mut cx: AsyncApp,
1429 ) -> Result<()> {
1430 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1431 let version = deserialize_version(&envelope.payload.version);
1432 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1433 let line_ending = deserialize_line_ending(
1434 proto::LineEnding::from_i32(envelope.payload.line_ending)
1435 .context("missing line ending")?,
1436 );
1437 this.update(&mut cx, |this, cx| {
1438 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1439 buffer.update(cx, |buffer, cx| {
1440 buffer.did_reload(version, line_ending, mtime, cx);
1441 });
1442 }
1443
1444 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1445 downstream_client
1446 .send(proto::BufferReloaded {
1447 project_id: *project_id,
1448 buffer_id: buffer_id.into(),
1449 mtime: envelope.payload.mtime,
1450 version: envelope.payload.version,
1451 line_ending: envelope.payload.line_ending,
1452 })
1453 .log_err();
1454 }
1455 })
1456 }
1457
1458 pub fn reload_buffers(
1459 &self,
1460 buffers: HashSet<Entity<Buffer>>,
1461 push_to_history: bool,
1462 cx: &mut Context<Self>,
1463 ) -> Task<Result<ProjectTransaction>> {
1464 if buffers.is_empty() {
1465 return Task::ready(Ok(ProjectTransaction::default()));
1466 }
1467 match &self.state {
1468 BufferStoreState::Local(this) => this.reload_buffers(buffers, push_to_history, cx),
1469 BufferStoreState::Remote(this) => this.reload_buffers(buffers, push_to_history, cx),
1470 }
1471 }
1472
1473 async fn handle_reload_buffers(
1474 this: Entity<Self>,
1475 envelope: TypedEnvelope<proto::ReloadBuffers>,
1476 mut cx: AsyncApp,
1477 ) -> Result<proto::ReloadBuffersResponse> {
1478 let sender_id = envelope.original_sender_id().unwrap_or_default();
1479 let reload = this.update(&mut cx, |this, cx| {
1480 let mut buffers = HashSet::default();
1481 for buffer_id in &envelope.payload.buffer_ids {
1482 let buffer_id = BufferId::new(*buffer_id)?;
1483 buffers.insert(this.get_existing(buffer_id)?);
1484 }
1485 anyhow::Ok(this.reload_buffers(buffers, false, cx))
1486 })??;
1487
1488 let project_transaction = reload.await?;
1489 let project_transaction = this.update(&mut cx, |this, cx| {
1490 this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
1491 })?;
1492 Ok(proto::ReloadBuffersResponse {
1493 transaction: Some(project_transaction),
1494 })
1495 }
1496
1497 pub fn create_buffer_for_peer(
1498 &mut self,
1499 buffer: &Entity<Buffer>,
1500 peer_id: proto::PeerId,
1501 cx: &mut Context<Self>,
1502 ) -> Task<Result<()>> {
1503 let buffer_id = buffer.read(cx).remote_id();
1504 let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
1505 if shared_buffers.contains_key(&buffer_id) {
1506 return Task::ready(Ok(()));
1507 }
1508 shared_buffers.insert(
1509 buffer_id,
1510 SharedBuffer {
1511 buffer: buffer.clone(),
1512 lsp_handle: None,
1513 },
1514 );
1515
1516 let Some((client, project_id)) = self.downstream_client.clone() else {
1517 return Task::ready(Ok(()));
1518 };
1519
1520 cx.spawn(async move |this, cx| {
1521 let Some(buffer) = this.read_with(cx, |this, _| this.get(buffer_id))? else {
1522 return anyhow::Ok(());
1523 };
1524
1525 let operations = buffer.update(cx, |b, cx| b.serialize_ops(None, cx))?;
1526 let operations = operations.await;
1527 let state = buffer.update(cx, |buffer, cx| buffer.to_proto(cx))?;
1528
1529 let initial_state = proto::CreateBufferForPeer {
1530 project_id,
1531 peer_id: Some(peer_id),
1532 variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1533 };
1534
1535 if client.send(initial_state).log_err().is_some() {
1536 let client = client.clone();
1537 cx.background_spawn(async move {
1538 let mut chunks = split_operations(operations).peekable();
1539 while let Some(chunk) = chunks.next() {
1540 let is_last = chunks.peek().is_none();
1541 client.send(proto::CreateBufferForPeer {
1542 project_id,
1543 peer_id: Some(peer_id),
1544 variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
1545 proto::BufferChunk {
1546 buffer_id: buffer_id.into(),
1547 operations: chunk,
1548 is_last,
1549 },
1550 )),
1551 })?;
1552 }
1553 anyhow::Ok(())
1554 })
1555 .await
1556 .log_err();
1557 }
1558 Ok(())
1559 })
1560 }
1561
1562 pub fn forget_shared_buffers(&mut self) {
1563 self.shared_buffers.clear();
1564 }
1565
1566 pub fn forget_shared_buffers_for(&mut self, peer_id: &proto::PeerId) {
1567 self.shared_buffers.remove(peer_id);
1568 }
1569
1570 pub fn update_peer_id(&mut self, old_peer_id: &proto::PeerId, new_peer_id: proto::PeerId) {
1571 if let Some(buffers) = self.shared_buffers.remove(old_peer_id) {
1572 self.shared_buffers.insert(new_peer_id, buffers);
1573 }
1574 }
1575
1576 pub fn has_shared_buffers(&self) -> bool {
1577 !self.shared_buffers.is_empty()
1578 }
1579
1580 pub fn create_local_buffer(
1581 &mut self,
1582 text: &str,
1583 language: Option<Arc<Language>>,
1584 project_searchable: bool,
1585 cx: &mut Context<Self>,
1586 ) -> Entity<Buffer> {
1587 let buffer = cx.new(|cx| {
1588 Buffer::local(text, cx)
1589 .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1590 });
1591
1592 self.add_buffer(buffer.clone(), cx).log_err();
1593 let buffer_id = buffer.read(cx).remote_id();
1594 if !project_searchable {
1595 self.non_searchable_buffers.insert(buffer_id);
1596 }
1597
1598 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1599 self.path_to_buffer_id.insert(
1600 ProjectPath {
1601 worktree_id: file.worktree_id(cx),
1602 path: file.path.clone(),
1603 },
1604 buffer_id,
1605 );
1606 let this = self
1607 .as_local_mut()
1608 .expect("local-only method called in a non-local context");
1609 if let Some(entry_id) = file.entry_id {
1610 this.local_buffer_ids_by_entry_id
1611 .insert(entry_id, buffer_id);
1612 }
1613 }
1614 buffer
1615 }
1616
1617 pub fn deserialize_project_transaction(
1618 &mut self,
1619 message: proto::ProjectTransaction,
1620 push_to_history: bool,
1621 cx: &mut Context<Self>,
1622 ) -> Task<Result<ProjectTransaction>> {
1623 if let Some(this) = self.as_remote_mut() {
1624 this.deserialize_project_transaction(message, push_to_history, cx)
1625 } else {
1626 debug_panic!("not a remote buffer store");
1627 Task::ready(Err(anyhow!("not a remote buffer store")))
1628 }
1629 }
1630
1631 pub fn wait_for_remote_buffer(
1632 &mut self,
1633 id: BufferId,
1634 cx: &mut Context<BufferStore>,
1635 ) -> Task<Result<Entity<Buffer>>> {
1636 if let Some(this) = self.as_remote_mut() {
1637 this.wait_for_remote_buffer(id, cx)
1638 } else {
1639 debug_panic!("not a remote buffer store");
1640 Task::ready(Err(anyhow!("not a remote buffer store")))
1641 }
1642 }
1643
1644 pub fn serialize_project_transaction_for_peer(
1645 &mut self,
1646 project_transaction: ProjectTransaction,
1647 peer_id: proto::PeerId,
1648 cx: &mut Context<Self>,
1649 ) -> proto::ProjectTransaction {
1650 let mut serialized_transaction = proto::ProjectTransaction {
1651 buffer_ids: Default::default(),
1652 transactions: Default::default(),
1653 };
1654 for (buffer, transaction) in project_transaction.0 {
1655 self.create_buffer_for_peer(&buffer, peer_id, cx)
1656 .detach_and_log_err(cx);
1657 serialized_transaction
1658 .buffer_ids
1659 .push(buffer.read(cx).remote_id().into());
1660 serialized_transaction
1661 .transactions
1662 .push(language::proto::serialize_transaction(&transaction));
1663 }
1664 serialized_transaction
1665 }
1666}
1667
1668impl OpenBuffer {
1669 fn upgrade(&self) -> Option<Entity<Buffer>> {
1670 match self {
1671 OpenBuffer::Complete { buffer, .. } => buffer.upgrade(),
1672 OpenBuffer::Operations(_) => None,
1673 }
1674 }
1675}
1676
1677fn is_not_found_error(error: &anyhow::Error) -> bool {
1678 error
1679 .root_cause()
1680 .downcast_ref::<io::Error>()
1681 .is_some_and(|err| err.kind() == io::ErrorKind::NotFound)
1682}