1use crate::{
2 ProjectItem as _, ProjectPath,
3 lsp_store::OpenLspBufferHandle,
4 search::SearchQuery,
5 worktree_store::{WorktreeStore, WorktreeStoreEvent},
6};
7use anyhow::{Context as _, Result, anyhow};
8use client::Client;
9use collections::{HashMap, HashSet, hash_map};
10use fs::Fs;
11use futures::{Future, FutureExt as _, StreamExt, channel::oneshot, future::Shared};
12use gpui::{
13 App, AppContext as _, AsyncApp, Context, Entity, EventEmitter, Subscription, Task, WeakEntity,
14};
15use language::{
16 Buffer, BufferEvent, Capability, DiskState, File as _, Language, Operation,
17 proto::{
18 deserialize_line_ending, deserialize_version, serialize_line_ending, serialize_version,
19 split_operations,
20 },
21};
22use rpc::{
23 AnyProtoClient, ErrorCode, ErrorExt as _, TypedEnvelope,
24 proto::{self, ToProto},
25};
26use smol::channel::Receiver;
27use std::{io, path::Path, pin::pin, sync::Arc, time::Instant};
28use text::BufferId;
29use util::{ResultExt as _, TryFutureExt, debug_panic, maybe};
30use worktree::{File, PathChange, ProjectEntryId, Worktree, WorktreeId};
31
32/// A set of open buffers.
33pub struct BufferStore {
34 state: BufferStoreState,
35 #[allow(clippy::type_complexity)]
36 loading_buffers: HashMap<ProjectPath, Shared<Task<Result<Entity<Buffer>, Arc<anyhow::Error>>>>>,
37 worktree_store: Entity<WorktreeStore>,
38 opened_buffers: HashMap<BufferId, OpenBuffer>,
39 path_to_buffer_id: HashMap<ProjectPath, BufferId>,
40 downstream_client: Option<(AnyProtoClient, u64)>,
41 shared_buffers: HashMap<proto::PeerId, HashMap<BufferId, SharedBuffer>>,
42 non_searchable_buffers: HashSet<BufferId>,
43}
44
45#[derive(Hash, Eq, PartialEq, Clone)]
46struct SharedBuffer {
47 buffer: Entity<Buffer>,
48 lsp_handle: Option<OpenLspBufferHandle>,
49}
50
51enum BufferStoreState {
52 Local(LocalBufferStore),
53 Remote(RemoteBufferStore),
54}
55
56struct RemoteBufferStore {
57 shared_with_me: HashSet<Entity<Buffer>>,
58 upstream_client: AnyProtoClient,
59 project_id: u64,
60 loading_remote_buffers_by_id: HashMap<BufferId, Entity<Buffer>>,
61 remote_buffer_listeners:
62 HashMap<BufferId, Vec<oneshot::Sender<anyhow::Result<Entity<Buffer>>>>>,
63 worktree_store: Entity<WorktreeStore>,
64}
65
66struct LocalBufferStore {
67 local_buffer_ids_by_entry_id: HashMap<ProjectEntryId, BufferId>,
68 worktree_store: Entity<WorktreeStore>,
69 _subscription: Subscription,
70}
71
72enum OpenBuffer {
73 Complete { buffer: WeakEntity<Buffer> },
74 Operations(Vec<Operation>),
75}
76
77pub enum BufferStoreEvent {
78 BufferAdded(Entity<Buffer>),
79 BufferOpened {
80 buffer: Entity<Buffer>,
81 project_path: ProjectPath,
82 },
83 SharedBufferClosed(proto::PeerId, BufferId),
84 BufferDropped(BufferId),
85 BufferChangedFilePath {
86 buffer: Entity<Buffer>,
87 old_file: Option<Arc<dyn language::File>>,
88 },
89}
90
91#[derive(Default, Debug, Clone)]
92pub struct ProjectTransaction(pub HashMap<Entity<Buffer>, language::Transaction>);
93
94impl PartialEq for ProjectTransaction {
95 fn eq(&self, other: &Self) -> bool {
96 self.0.len() == other.0.len()
97 && self.0.iter().all(|(buffer, transaction)| {
98 other.0.get(buffer).is_some_and(|t| t.id == transaction.id)
99 })
100 }
101}
102
103impl EventEmitter<BufferStoreEvent> for BufferStore {}
104
105impl RemoteBufferStore {
106 pub fn wait_for_remote_buffer(
107 &mut self,
108 id: BufferId,
109 cx: &mut Context<BufferStore>,
110 ) -> Task<Result<Entity<Buffer>>> {
111 let (tx, rx) = oneshot::channel();
112 self.remote_buffer_listeners.entry(id).or_default().push(tx);
113
114 cx.spawn(async move |this, cx| {
115 if let Some(buffer) = this
116 .read_with(cx, |buffer_store, _| buffer_store.get(id))
117 .ok()
118 .flatten()
119 {
120 return Ok(buffer);
121 }
122
123 cx.background_spawn(async move { rx.await? }).await
124 })
125 }
126
127 fn save_remote_buffer(
128 &self,
129 buffer_handle: Entity<Buffer>,
130 new_path: Option<proto::ProjectPath>,
131 cx: &Context<BufferStore>,
132 ) -> Task<Result<()>> {
133 let buffer = buffer_handle.read(cx);
134 let buffer_id = buffer.remote_id().into();
135 let version = buffer.version();
136 let rpc = self.upstream_client.clone();
137 let project_id = self.project_id;
138 cx.spawn(async move |_, cx| {
139 let response = rpc
140 .request(proto::SaveBuffer {
141 project_id,
142 buffer_id,
143 new_path,
144 version: serialize_version(&version),
145 })
146 .await?;
147 let version = deserialize_version(&response.version);
148 let mtime = response.mtime.map(|mtime| mtime.into());
149
150 buffer_handle.update(cx, |buffer, cx| {
151 buffer.did_save(version.clone(), mtime, cx);
152 })?;
153
154 Ok(())
155 })
156 }
157
158 pub fn handle_create_buffer_for_peer(
159 &mut self,
160 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
161 replica_id: u16,
162 capability: Capability,
163 cx: &mut Context<BufferStore>,
164 ) -> Result<Option<Entity<Buffer>>> {
165 match envelope.payload.variant.context("missing variant")? {
166 proto::create_buffer_for_peer::Variant::State(mut state) => {
167 let buffer_id = BufferId::new(state.id)?;
168
169 let buffer_result = maybe!({
170 let mut buffer_file = None;
171 if let Some(file) = state.file.take() {
172 let worktree_id = worktree::WorktreeId::from_proto(file.worktree_id);
173 let worktree = self
174 .worktree_store
175 .read(cx)
176 .worktree_for_id(worktree_id, cx)
177 .with_context(|| {
178 format!("no worktree found for id {}", file.worktree_id)
179 })?;
180 buffer_file = Some(Arc::new(File::from_proto(file, worktree, cx)?)
181 as Arc<dyn language::File>);
182 }
183 Buffer::from_proto(replica_id, capability, state, buffer_file)
184 });
185
186 match buffer_result {
187 Ok(buffer) => {
188 let buffer = cx.new(|_| buffer);
189 self.loading_remote_buffers_by_id.insert(buffer_id, buffer);
190 }
191 Err(error) => {
192 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
193 for listener in listeners {
194 listener.send(Err(anyhow!(error.cloned()))).ok();
195 }
196 }
197 }
198 }
199 }
200 proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
201 let buffer_id = BufferId::new(chunk.buffer_id)?;
202 let buffer = self
203 .loading_remote_buffers_by_id
204 .get(&buffer_id)
205 .cloned()
206 .with_context(|| {
207 format!(
208 "received chunk for buffer {} without initial state",
209 chunk.buffer_id
210 )
211 })?;
212
213 let result = maybe!({
214 let operations = chunk
215 .operations
216 .into_iter()
217 .map(language::proto::deserialize_operation)
218 .collect::<Result<Vec<_>>>()?;
219 buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx));
220 anyhow::Ok(())
221 });
222
223 if let Err(error) = result {
224 self.loading_remote_buffers_by_id.remove(&buffer_id);
225 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
226 for listener in listeners {
227 listener.send(Err(error.cloned())).ok();
228 }
229 }
230 } else if chunk.is_last {
231 self.loading_remote_buffers_by_id.remove(&buffer_id);
232 if self.upstream_client.is_via_collab() {
233 // retain buffers sent by peers to avoid races.
234 self.shared_with_me.insert(buffer.clone());
235 }
236
237 if let Some(senders) = self.remote_buffer_listeners.remove(&buffer_id) {
238 for sender in senders {
239 sender.send(Ok(buffer.clone())).ok();
240 }
241 }
242 return Ok(Some(buffer));
243 }
244 }
245 }
246 Ok(None)
247 }
248
249 pub fn incomplete_buffer_ids(&self) -> Vec<BufferId> {
250 self.loading_remote_buffers_by_id
251 .keys()
252 .copied()
253 .collect::<Vec<_>>()
254 }
255
256 pub fn deserialize_project_transaction(
257 &self,
258 message: proto::ProjectTransaction,
259 push_to_history: bool,
260 cx: &mut Context<BufferStore>,
261 ) -> Task<Result<ProjectTransaction>> {
262 cx.spawn(async move |this, cx| {
263 let mut project_transaction = ProjectTransaction::default();
264 for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
265 {
266 let buffer_id = BufferId::new(buffer_id)?;
267 let buffer = this
268 .update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
269 .await?;
270 let transaction = language::proto::deserialize_transaction(transaction)?;
271 project_transaction.0.insert(buffer, transaction);
272 }
273
274 for (buffer, transaction) in &project_transaction.0 {
275 buffer
276 .update(cx, |buffer, _| {
277 buffer.wait_for_edits(transaction.edit_ids.iter().copied())
278 })?
279 .await?;
280
281 if push_to_history {
282 buffer.update(cx, |buffer, _| {
283 buffer.push_transaction(transaction.clone(), Instant::now());
284 buffer.finalize_last_transaction();
285 })?;
286 }
287 }
288
289 Ok(project_transaction)
290 })
291 }
292
293 fn open_buffer(
294 &self,
295 path: Arc<Path>,
296 worktree: Entity<Worktree>,
297 cx: &mut Context<BufferStore>,
298 ) -> Task<Result<Entity<Buffer>>> {
299 let worktree_id = worktree.read(cx).id().to_proto();
300 let project_id = self.project_id;
301 let client = self.upstream_client.clone();
302 cx.spawn(async move |this, cx| {
303 let response = client
304 .request(proto::OpenBufferByPath {
305 project_id,
306 worktree_id,
307 path: path.to_proto(),
308 })
309 .await?;
310 let buffer_id = BufferId::new(response.buffer_id)?;
311
312 let buffer = this
313 .update(cx, {
314 |this, cx| this.wait_for_remote_buffer(buffer_id, cx)
315 })?
316 .await?;
317
318 Ok(buffer)
319 })
320 }
321
322 fn create_buffer(
323 &self,
324 project_searchable: bool,
325 cx: &mut Context<BufferStore>,
326 ) -> Task<Result<Entity<Buffer>>> {
327 let create = self.upstream_client.request(proto::OpenNewBuffer {
328 project_id: self.project_id,
329 });
330 cx.spawn(async move |this, cx| {
331 let response = create.await?;
332 let buffer_id = BufferId::new(response.buffer_id)?;
333
334 this.update(cx, |this, cx| {
335 if !project_searchable {
336 this.non_searchable_buffers.insert(buffer_id);
337 }
338 this.wait_for_remote_buffer(buffer_id, cx)
339 })?
340 .await
341 })
342 }
343
344 fn reload_buffers(
345 &self,
346 buffers: HashSet<Entity<Buffer>>,
347 push_to_history: bool,
348 cx: &mut Context<BufferStore>,
349 ) -> Task<Result<ProjectTransaction>> {
350 let request = self.upstream_client.request(proto::ReloadBuffers {
351 project_id: self.project_id,
352 buffer_ids: buffers
353 .iter()
354 .map(|buffer| buffer.read(cx).remote_id().to_proto())
355 .collect(),
356 });
357
358 cx.spawn(async move |this, cx| {
359 let response = request.await?.transaction.context("missing transaction")?;
360 this.update(cx, |this, cx| {
361 this.deserialize_project_transaction(response, push_to_history, cx)
362 })?
363 .await
364 })
365 }
366}
367
368impl LocalBufferStore {
369 fn save_local_buffer(
370 &self,
371 buffer_handle: Entity<Buffer>,
372 worktree: Entity<Worktree>,
373 path: Arc<Path>,
374 mut has_changed_file: bool,
375 cx: &mut Context<BufferStore>,
376 ) -> Task<Result<()>> {
377 let buffer = buffer_handle.read(cx);
378
379 let text = buffer.as_rope().clone();
380 let line_ending = buffer.line_ending();
381 let version = buffer.version();
382 let buffer_id = buffer.remote_id();
383 let file = buffer.file().cloned();
384 if file
385 .as_ref()
386 .is_some_and(|file| file.disk_state() == DiskState::New)
387 {
388 has_changed_file = true;
389 }
390
391 let save = worktree.update(cx, |worktree, cx| {
392 worktree.write_file(path.as_ref(), text, line_ending, cx)
393 });
394
395 cx.spawn(async move |this, cx| {
396 let new_file = save.await?;
397 let mtime = new_file.disk_state().mtime();
398 this.update(cx, |this, cx| {
399 if let Some((downstream_client, project_id)) = this.downstream_client.clone() {
400 if has_changed_file {
401 downstream_client
402 .send(proto::UpdateBufferFile {
403 project_id,
404 buffer_id: buffer_id.to_proto(),
405 file: Some(language::File::to_proto(&*new_file, cx)),
406 })
407 .log_err();
408 }
409 downstream_client
410 .send(proto::BufferSaved {
411 project_id,
412 buffer_id: buffer_id.to_proto(),
413 version: serialize_version(&version),
414 mtime: mtime.map(|time| time.into()),
415 })
416 .log_err();
417 }
418 })?;
419 buffer_handle.update(cx, |buffer, cx| {
420 if has_changed_file {
421 buffer.file_updated(new_file, cx);
422 }
423 buffer.did_save(version.clone(), mtime, cx);
424 })
425 })
426 }
427
428 fn subscribe_to_worktree(
429 &mut self,
430 worktree: &Entity<Worktree>,
431 cx: &mut Context<BufferStore>,
432 ) {
433 cx.subscribe(worktree, |this, worktree, event, cx| {
434 if worktree.read(cx).is_local()
435 && let worktree::Event::UpdatedEntries(changes) = event
436 {
437 Self::local_worktree_entries_changed(this, &worktree, changes, cx);
438 }
439 })
440 .detach();
441 }
442
443 fn local_worktree_entries_changed(
444 this: &mut BufferStore,
445 worktree_handle: &Entity<Worktree>,
446 changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
447 cx: &mut Context<BufferStore>,
448 ) {
449 let snapshot = worktree_handle.read(cx).snapshot();
450 for (path, entry_id, _) in changes {
451 Self::local_worktree_entry_changed(
452 this,
453 *entry_id,
454 path,
455 worktree_handle,
456 &snapshot,
457 cx,
458 );
459 }
460 }
461
462 fn local_worktree_entry_changed(
463 this: &mut BufferStore,
464 entry_id: ProjectEntryId,
465 path: &Arc<Path>,
466 worktree: &Entity<worktree::Worktree>,
467 snapshot: &worktree::Snapshot,
468 cx: &mut Context<BufferStore>,
469 ) -> Option<()> {
470 let project_path = ProjectPath {
471 worktree_id: snapshot.id(),
472 path: path.clone(),
473 };
474
475 let buffer_id = this
476 .as_local_mut()
477 .and_then(|local| local.local_buffer_ids_by_entry_id.get(&entry_id))
478 .copied()
479 .or_else(|| this.path_to_buffer_id.get(&project_path).copied())?;
480
481 let buffer = if let Some(buffer) = this.get(buffer_id) {
482 Some(buffer)
483 } else {
484 this.opened_buffers.remove(&buffer_id);
485 None
486 };
487
488 let buffer = if let Some(buffer) = buffer {
489 buffer
490 } else {
491 this.path_to_buffer_id.remove(&project_path);
492 let this = this.as_local_mut()?;
493 this.local_buffer_ids_by_entry_id.remove(&entry_id);
494 return None;
495 };
496
497 let events = buffer.update(cx, |buffer, cx| {
498 let file = buffer.file()?;
499 let old_file = File::from_dyn(Some(file))?;
500 if old_file.worktree != *worktree {
501 return None;
502 }
503
504 let snapshot_entry = old_file
505 .entry_id
506 .and_then(|entry_id| snapshot.entry_for_id(entry_id))
507 .or_else(|| snapshot.entry_for_path(old_file.path.as_ref()));
508
509 let new_file = if let Some(entry) = snapshot_entry {
510 File {
511 disk_state: match entry.mtime {
512 Some(mtime) => DiskState::Present { mtime },
513 None => old_file.disk_state,
514 },
515 is_local: true,
516 entry_id: Some(entry.id),
517 path: entry.path.clone(),
518 worktree: worktree.clone(),
519 is_private: entry.is_private,
520 }
521 } else {
522 File {
523 disk_state: DiskState::Deleted,
524 is_local: true,
525 entry_id: old_file.entry_id,
526 path: old_file.path.clone(),
527 worktree: worktree.clone(),
528 is_private: old_file.is_private,
529 }
530 };
531
532 if new_file == *old_file {
533 return None;
534 }
535
536 let mut events = Vec::new();
537 if new_file.path != old_file.path {
538 this.path_to_buffer_id.remove(&ProjectPath {
539 path: old_file.path.clone(),
540 worktree_id: old_file.worktree_id(cx),
541 });
542 this.path_to_buffer_id.insert(
543 ProjectPath {
544 worktree_id: new_file.worktree_id(cx),
545 path: new_file.path.clone(),
546 },
547 buffer_id,
548 );
549 events.push(BufferStoreEvent::BufferChangedFilePath {
550 buffer: cx.entity(),
551 old_file: buffer.file().cloned(),
552 });
553 }
554 let local = this.as_local_mut()?;
555 if new_file.entry_id != old_file.entry_id {
556 if let Some(entry_id) = old_file.entry_id {
557 local.local_buffer_ids_by_entry_id.remove(&entry_id);
558 }
559 if let Some(entry_id) = new_file.entry_id {
560 local
561 .local_buffer_ids_by_entry_id
562 .insert(entry_id, buffer_id);
563 }
564 }
565
566 if let Some((client, project_id)) = &this.downstream_client {
567 client
568 .send(proto::UpdateBufferFile {
569 project_id: *project_id,
570 buffer_id: buffer_id.to_proto(),
571 file: Some(new_file.to_proto(cx)),
572 })
573 .ok();
574 }
575
576 buffer.file_updated(Arc::new(new_file), cx);
577 Some(events)
578 })?;
579
580 for event in events {
581 cx.emit(event);
582 }
583
584 None
585 }
586
587 fn save_buffer(
588 &self,
589 buffer: Entity<Buffer>,
590 cx: &mut Context<BufferStore>,
591 ) -> Task<Result<()>> {
592 let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
593 return Task::ready(Err(anyhow!("buffer doesn't have a file")));
594 };
595 let worktree = file.worktree.clone();
596 self.save_local_buffer(buffer, worktree, file.path.clone(), false, cx)
597 }
598
599 fn save_buffer_as(
600 &self,
601 buffer: Entity<Buffer>,
602 path: ProjectPath,
603 cx: &mut Context<BufferStore>,
604 ) -> Task<Result<()>> {
605 let Some(worktree) = self
606 .worktree_store
607 .read(cx)
608 .worktree_for_id(path.worktree_id, cx)
609 else {
610 return Task::ready(Err(anyhow!("no such worktree")));
611 };
612 self.save_local_buffer(buffer, worktree, path.path, true, cx)
613 }
614
615 fn open_buffer(
616 &self,
617 path: Arc<Path>,
618 worktree: Entity<Worktree>,
619 cx: &mut Context<BufferStore>,
620 ) -> Task<Result<Entity<Buffer>>> {
621 let load_buffer = worktree.update(cx, |worktree, cx| {
622 let load_file = worktree.load_file(path.as_ref(), cx);
623 let reservation = cx.reserve_entity();
624 let buffer_id = BufferId::from(reservation.entity_id().as_non_zero_u64());
625 cx.spawn(async move |_, cx| {
626 let loaded = load_file.await?;
627 let text_buffer = cx
628 .background_spawn(async move { text::Buffer::new(0, buffer_id, loaded.text) })
629 .await;
630 cx.insert_entity(reservation, |_| {
631 Buffer::build(text_buffer, Some(loaded.file), Capability::ReadWrite)
632 })
633 })
634 });
635
636 cx.spawn(async move |this, cx| {
637 let buffer = match load_buffer.await {
638 Ok(buffer) => Ok(buffer),
639 Err(error) if is_not_found_error(&error) => cx.new(|cx| {
640 let buffer_id = BufferId::from(cx.entity_id().as_non_zero_u64());
641 let text_buffer = text::Buffer::new(0, buffer_id, "");
642 Buffer::build(
643 text_buffer,
644 Some(Arc::new(File {
645 worktree,
646 path,
647 disk_state: DiskState::New,
648 entry_id: None,
649 is_local: true,
650 is_private: false,
651 })),
652 Capability::ReadWrite,
653 )
654 }),
655 Err(e) => Err(e),
656 }?;
657 this.update(cx, |this, cx| {
658 this.add_buffer(buffer.clone(), cx)?;
659 let buffer_id = buffer.read(cx).remote_id();
660 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
661 this.path_to_buffer_id.insert(
662 ProjectPath {
663 worktree_id: file.worktree_id(cx),
664 path: file.path.clone(),
665 },
666 buffer_id,
667 );
668 let this = this.as_local_mut().unwrap();
669 if let Some(entry_id) = file.entry_id {
670 this.local_buffer_ids_by_entry_id
671 .insert(entry_id, buffer_id);
672 }
673 }
674
675 anyhow::Ok(())
676 })??;
677
678 Ok(buffer)
679 })
680 }
681
682 fn create_buffer(
683 &self,
684 project_searchable: bool,
685 cx: &mut Context<BufferStore>,
686 ) -> Task<Result<Entity<Buffer>>> {
687 cx.spawn(async move |buffer_store, cx| {
688 let buffer =
689 cx.new(|cx| Buffer::local("", cx).with_language(language::PLAIN_TEXT.clone(), cx))?;
690 buffer_store.update(cx, |buffer_store, cx| {
691 buffer_store.add_buffer(buffer.clone(), cx).log_err();
692 if !project_searchable {
693 buffer_store
694 .non_searchable_buffers
695 .insert(buffer.read(cx).remote_id());
696 }
697 })?;
698 Ok(buffer)
699 })
700 }
701
702 fn reload_buffers(
703 &self,
704 buffers: HashSet<Entity<Buffer>>,
705 push_to_history: bool,
706 cx: &mut Context<BufferStore>,
707 ) -> Task<Result<ProjectTransaction>> {
708 cx.spawn(async move |_, cx| {
709 let mut project_transaction = ProjectTransaction::default();
710 for buffer in buffers {
711 let transaction = buffer.update(cx, |buffer, cx| buffer.reload(cx))?.await?;
712 buffer.update(cx, |buffer, cx| {
713 if let Some(transaction) = transaction {
714 if !push_to_history {
715 buffer.forget_transaction(transaction.id);
716 }
717 project_transaction.0.insert(cx.entity(), transaction);
718 }
719 })?;
720 }
721
722 Ok(project_transaction)
723 })
724 }
725}
726
727impl BufferStore {
728 pub fn init(client: &AnyProtoClient) {
729 client.add_entity_message_handler(Self::handle_buffer_reloaded);
730 client.add_entity_message_handler(Self::handle_buffer_saved);
731 client.add_entity_message_handler(Self::handle_update_buffer_file);
732 client.add_entity_request_handler(Self::handle_save_buffer);
733 client.add_entity_request_handler(Self::handle_reload_buffers);
734 }
735
736 /// Creates a buffer store, optionally retaining its buffers.
737 pub fn local(worktree_store: Entity<WorktreeStore>, cx: &mut Context<Self>) -> Self {
738 Self {
739 state: BufferStoreState::Local(LocalBufferStore {
740 local_buffer_ids_by_entry_id: Default::default(),
741 worktree_store: worktree_store.clone(),
742 _subscription: cx.subscribe(&worktree_store, |this, _, event, cx| {
743 if let WorktreeStoreEvent::WorktreeAdded(worktree) = event {
744 let this = this.as_local_mut().unwrap();
745 this.subscribe_to_worktree(worktree, cx);
746 }
747 }),
748 }),
749 downstream_client: None,
750 opened_buffers: Default::default(),
751 path_to_buffer_id: Default::default(),
752 shared_buffers: Default::default(),
753 loading_buffers: Default::default(),
754 non_searchable_buffers: Default::default(),
755 worktree_store,
756 }
757 }
758
759 pub fn remote(
760 worktree_store: Entity<WorktreeStore>,
761 upstream_client: AnyProtoClient,
762 remote_id: u64,
763 _cx: &mut Context<Self>,
764 ) -> Self {
765 Self {
766 state: BufferStoreState::Remote(RemoteBufferStore {
767 shared_with_me: Default::default(),
768 loading_remote_buffers_by_id: Default::default(),
769 remote_buffer_listeners: Default::default(),
770 project_id: remote_id,
771 upstream_client,
772 worktree_store: worktree_store.clone(),
773 }),
774 downstream_client: None,
775 opened_buffers: Default::default(),
776 path_to_buffer_id: Default::default(),
777 loading_buffers: Default::default(),
778 shared_buffers: Default::default(),
779 non_searchable_buffers: Default::default(),
780 worktree_store,
781 }
782 }
783
784 fn as_local_mut(&mut self) -> Option<&mut LocalBufferStore> {
785 match &mut self.state {
786 BufferStoreState::Local(state) => Some(state),
787 _ => None,
788 }
789 }
790
791 fn as_remote_mut(&mut self) -> Option<&mut RemoteBufferStore> {
792 match &mut self.state {
793 BufferStoreState::Remote(state) => Some(state),
794 _ => None,
795 }
796 }
797
798 fn as_remote(&self) -> Option<&RemoteBufferStore> {
799 match &self.state {
800 BufferStoreState::Remote(state) => Some(state),
801 _ => None,
802 }
803 }
804
805 pub fn open_buffer(
806 &mut self,
807 project_path: ProjectPath,
808 cx: &mut Context<Self>,
809 ) -> Task<Result<Entity<Buffer>>> {
810 if let Some(buffer) = self.get_by_path(&project_path) {
811 cx.emit(BufferStoreEvent::BufferOpened {
812 buffer: buffer.clone(),
813 project_path,
814 });
815
816 return Task::ready(Ok(buffer));
817 }
818
819 let task = match self.loading_buffers.entry(project_path.clone()) {
820 hash_map::Entry::Occupied(e) => e.get().clone(),
821 hash_map::Entry::Vacant(entry) => {
822 let path = project_path.path.clone();
823 let Some(worktree) = self
824 .worktree_store
825 .read(cx)
826 .worktree_for_id(project_path.worktree_id, cx)
827 else {
828 return Task::ready(Err(anyhow!("no such worktree")));
829 };
830 let load_buffer = match &self.state {
831 BufferStoreState::Local(this) => this.open_buffer(path, worktree, cx),
832 BufferStoreState::Remote(this) => this.open_buffer(path, worktree, cx),
833 };
834
835 entry
836 .insert(
837 cx.spawn(async move |this, cx| {
838 let load_result = load_buffer.await;
839 this.update(cx, |this, cx| {
840 // Record the fact that the buffer is no longer loading.
841 this.loading_buffers.remove(&project_path);
842
843 let buffer = load_result.map_err(Arc::new)?;
844 cx.emit(BufferStoreEvent::BufferOpened {
845 buffer: buffer.clone(),
846 project_path,
847 });
848
849 Ok(buffer)
850 })?
851 })
852 .shared(),
853 )
854 .clone()
855 }
856 };
857
858 cx.background_spawn(async move {
859 task.await.map_err(|e| {
860 if e.error_code() != ErrorCode::Internal {
861 anyhow!(e.error_code())
862 } else {
863 anyhow!("{e}")
864 }
865 })
866 })
867 }
868
869 pub fn create_buffer(
870 &mut self,
871 project_searchable: bool,
872 cx: &mut Context<Self>,
873 ) -> Task<Result<Entity<Buffer>>> {
874 match &self.state {
875 BufferStoreState::Local(this) => this.create_buffer(project_searchable, cx),
876 BufferStoreState::Remote(this) => this.create_buffer(project_searchable, cx),
877 }
878 }
879
880 pub fn save_buffer(
881 &mut self,
882 buffer: Entity<Buffer>,
883 cx: &mut Context<Self>,
884 ) -> Task<Result<()>> {
885 match &mut self.state {
886 BufferStoreState::Local(this) => this.save_buffer(buffer, cx),
887 BufferStoreState::Remote(this) => this.save_remote_buffer(buffer, None, cx),
888 }
889 }
890
891 pub fn save_buffer_as(
892 &mut self,
893 buffer: Entity<Buffer>,
894 path: ProjectPath,
895 cx: &mut Context<Self>,
896 ) -> Task<Result<()>> {
897 let old_file = buffer.read(cx).file().cloned();
898 let task = match &self.state {
899 BufferStoreState::Local(this) => this.save_buffer_as(buffer.clone(), path, cx),
900 BufferStoreState::Remote(this) => {
901 this.save_remote_buffer(buffer.clone(), Some(path.to_proto()), cx)
902 }
903 };
904 cx.spawn(async move |this, cx| {
905 task.await?;
906 this.update(cx, |_, cx| {
907 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
908 })
909 })
910 }
911
912 fn add_buffer(&mut self, buffer_entity: Entity<Buffer>, cx: &mut Context<Self>) -> Result<()> {
913 let buffer = buffer_entity.read(cx);
914 let remote_id = buffer.remote_id();
915 let path = File::from_dyn(buffer.file()).map(|file| ProjectPath {
916 path: file.path.clone(),
917 worktree_id: file.worktree_id(cx),
918 });
919 let is_remote = buffer.replica_id() != 0;
920 let open_buffer = OpenBuffer::Complete {
921 buffer: buffer_entity.downgrade(),
922 };
923
924 let handle = cx.entity().downgrade();
925 buffer_entity.update(cx, move |_, cx| {
926 cx.on_release(move |buffer, cx| {
927 handle
928 .update(cx, |_, cx| {
929 cx.emit(BufferStoreEvent::BufferDropped(buffer.remote_id()))
930 })
931 .ok();
932 })
933 .detach()
934 });
935 let _expect_path_to_exist;
936 match self.opened_buffers.entry(remote_id) {
937 hash_map::Entry::Vacant(entry) => {
938 entry.insert(open_buffer);
939 _expect_path_to_exist = false;
940 }
941 hash_map::Entry::Occupied(mut entry) => {
942 if let OpenBuffer::Operations(operations) = entry.get_mut() {
943 buffer_entity.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx));
944 } else if entry.get().upgrade().is_some() {
945 if is_remote {
946 return Ok(());
947 } else {
948 debug_panic!("buffer {remote_id} was already registered");
949 anyhow::bail!("buffer {remote_id} was already registered");
950 }
951 }
952 entry.insert(open_buffer);
953 _expect_path_to_exist = true;
954 }
955 }
956
957 if let Some(path) = path {
958 self.path_to_buffer_id.insert(path, remote_id);
959 }
960
961 cx.subscribe(&buffer_entity, Self::on_buffer_event).detach();
962 cx.emit(BufferStoreEvent::BufferAdded(buffer_entity));
963 Ok(())
964 }
965
966 pub fn buffers(&self) -> impl '_ + Iterator<Item = Entity<Buffer>> {
967 self.opened_buffers
968 .values()
969 .filter_map(|buffer| buffer.upgrade())
970 }
971
972 pub fn loading_buffers(
973 &self,
974 ) -> impl Iterator<Item = (&ProjectPath, impl Future<Output = Result<Entity<Buffer>>>)> {
975 self.loading_buffers.iter().map(|(path, task)| {
976 let task = task.clone();
977 (path, async move {
978 task.await.map_err(|e| {
979 if e.error_code() != ErrorCode::Internal {
980 anyhow!(e.error_code())
981 } else {
982 anyhow!("{e}")
983 }
984 })
985 })
986 })
987 }
988
989 pub fn buffer_id_for_project_path(&self, project_path: &ProjectPath) -> Option<&BufferId> {
990 self.path_to_buffer_id.get(project_path)
991 }
992
993 pub fn get_by_path(&self, path: &ProjectPath) -> Option<Entity<Buffer>> {
994 self.path_to_buffer_id
995 .get(path)
996 .and_then(|buffer_id| self.get(*buffer_id))
997 }
998
999 pub fn get(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
1000 self.opened_buffers.get(&buffer_id)?.upgrade()
1001 }
1002
1003 pub fn get_existing(&self, buffer_id: BufferId) -> Result<Entity<Buffer>> {
1004 self.get(buffer_id)
1005 .with_context(|| format!("unknown buffer id {buffer_id}"))
1006 }
1007
1008 pub fn get_possibly_incomplete(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
1009 self.get(buffer_id).or_else(|| {
1010 self.as_remote()
1011 .and_then(|remote| remote.loading_remote_buffers_by_id.get(&buffer_id).cloned())
1012 })
1013 }
1014
1015 pub fn buffer_version_info(&self, cx: &App) -> (Vec<proto::BufferVersion>, Vec<BufferId>) {
1016 let buffers = self
1017 .buffers()
1018 .map(|buffer| {
1019 let buffer = buffer.read(cx);
1020 proto::BufferVersion {
1021 id: buffer.remote_id().into(),
1022 version: language::proto::serialize_version(&buffer.version),
1023 }
1024 })
1025 .collect();
1026 let incomplete_buffer_ids = self
1027 .as_remote()
1028 .map(|remote| remote.incomplete_buffer_ids())
1029 .unwrap_or_default();
1030 (buffers, incomplete_buffer_ids)
1031 }
1032
1033 pub fn disconnected_from_host(&mut self, cx: &mut App) {
1034 for open_buffer in self.opened_buffers.values_mut() {
1035 if let Some(buffer) = open_buffer.upgrade() {
1036 buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1037 }
1038 }
1039
1040 for buffer in self.buffers() {
1041 buffer.update(cx, |buffer, cx| {
1042 buffer.set_capability(Capability::ReadOnly, cx)
1043 });
1044 }
1045
1046 if let Some(remote) = self.as_remote_mut() {
1047 // Wake up all futures currently waiting on a buffer to get opened,
1048 // to give them a chance to fail now that we've disconnected.
1049 remote.remote_buffer_listeners.clear()
1050 }
1051 }
1052
1053 pub fn shared(&mut self, remote_id: u64, downstream_client: AnyProtoClient, _cx: &mut App) {
1054 self.downstream_client = Some((downstream_client, remote_id));
1055 }
1056
1057 pub fn unshared(&mut self, _cx: &mut Context<Self>) {
1058 self.downstream_client.take();
1059 self.forget_shared_buffers();
1060 }
1061
1062 pub fn discard_incomplete(&mut self) {
1063 self.opened_buffers
1064 .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
1065 }
1066
1067 fn buffer_changed_file(&mut self, buffer: Entity<Buffer>, cx: &mut App) -> Option<()> {
1068 let file = File::from_dyn(buffer.read(cx).file())?;
1069
1070 let remote_id = buffer.read(cx).remote_id();
1071 if let Some(entry_id) = file.entry_id {
1072 if let Some(local) = self.as_local_mut() {
1073 match local.local_buffer_ids_by_entry_id.get(&entry_id) {
1074 Some(_) => {
1075 return None;
1076 }
1077 None => {
1078 local
1079 .local_buffer_ids_by_entry_id
1080 .insert(entry_id, remote_id);
1081 }
1082 }
1083 }
1084 self.path_to_buffer_id.insert(
1085 ProjectPath {
1086 worktree_id: file.worktree_id(cx),
1087 path: file.path.clone(),
1088 },
1089 remote_id,
1090 );
1091 };
1092
1093 Some(())
1094 }
1095
1096 pub fn find_search_candidates(
1097 &mut self,
1098 query: &SearchQuery,
1099 mut limit: usize,
1100 fs: Arc<dyn Fs>,
1101 cx: &mut Context<Self>,
1102 ) -> Receiver<Entity<Buffer>> {
1103 let (tx, rx) = smol::channel::unbounded();
1104 let mut open_buffers = HashSet::default();
1105 let mut unnamed_buffers = Vec::new();
1106 for handle in self.buffers() {
1107 let buffer = handle.read(cx);
1108 if self.non_searchable_buffers.contains(&buffer.remote_id()) {
1109 continue;
1110 } else if let Some(entry_id) = buffer.entry_id(cx) {
1111 open_buffers.insert(entry_id);
1112 } else {
1113 limit = limit.saturating_sub(1);
1114 unnamed_buffers.push(handle)
1115 };
1116 }
1117
1118 const MAX_CONCURRENT_BUFFER_OPENS: usize = 64;
1119 let project_paths_rx = self
1120 .worktree_store
1121 .update(cx, |worktree_store, cx| {
1122 worktree_store.find_search_candidates(query.clone(), limit, open_buffers, fs, cx)
1123 })
1124 .chunks(MAX_CONCURRENT_BUFFER_OPENS);
1125
1126 cx.spawn(async move |this, cx| {
1127 for buffer in unnamed_buffers {
1128 tx.send(buffer).await.ok();
1129 }
1130
1131 let mut project_paths_rx = pin!(project_paths_rx);
1132 while let Some(project_paths) = project_paths_rx.next().await {
1133 let buffers = this.update(cx, |this, cx| {
1134 project_paths
1135 .into_iter()
1136 .map(|project_path| this.open_buffer(project_path, cx))
1137 .collect::<Vec<_>>()
1138 })?;
1139 for buffer_task in buffers {
1140 if let Some(buffer) = buffer_task.await.log_err()
1141 && tx.send(buffer).await.is_err()
1142 {
1143 return anyhow::Ok(());
1144 }
1145 }
1146 }
1147 anyhow::Ok(())
1148 })
1149 .detach();
1150 rx
1151 }
1152
1153 fn on_buffer_event(
1154 &mut self,
1155 buffer: Entity<Buffer>,
1156 event: &BufferEvent,
1157 cx: &mut Context<Self>,
1158 ) {
1159 match event {
1160 BufferEvent::FileHandleChanged => {
1161 self.buffer_changed_file(buffer, cx);
1162 }
1163 BufferEvent::Reloaded => {
1164 let Some((downstream_client, project_id)) = self.downstream_client.as_ref() else {
1165 return;
1166 };
1167 let buffer = buffer.read(cx);
1168 downstream_client
1169 .send(proto::BufferReloaded {
1170 project_id: *project_id,
1171 buffer_id: buffer.remote_id().to_proto(),
1172 version: serialize_version(&buffer.version()),
1173 mtime: buffer.saved_mtime().map(|t| t.into()),
1174 line_ending: serialize_line_ending(buffer.line_ending()) as i32,
1175 })
1176 .log_err();
1177 }
1178 BufferEvent::LanguageChanged => {}
1179 _ => {}
1180 }
1181 }
1182
1183 pub async fn handle_update_buffer(
1184 this: Entity<Self>,
1185 envelope: TypedEnvelope<proto::UpdateBuffer>,
1186 mut cx: AsyncApp,
1187 ) -> Result<proto::Ack> {
1188 let payload = envelope.payload;
1189 let buffer_id = BufferId::new(payload.buffer_id)?;
1190 let ops = payload
1191 .operations
1192 .into_iter()
1193 .map(language::proto::deserialize_operation)
1194 .collect::<Result<Vec<_>, _>>()?;
1195 this.update(&mut cx, |this, cx| {
1196 match this.opened_buffers.entry(buffer_id) {
1197 hash_map::Entry::Occupied(mut e) => match e.get_mut() {
1198 OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
1199 OpenBuffer::Complete { buffer, .. } => {
1200 if let Some(buffer) = buffer.upgrade() {
1201 buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx));
1202 }
1203 }
1204 },
1205 hash_map::Entry::Vacant(e) => {
1206 e.insert(OpenBuffer::Operations(ops));
1207 }
1208 }
1209 Ok(proto::Ack {})
1210 })?
1211 }
1212
1213 pub fn register_shared_lsp_handle(
1214 &mut self,
1215 peer_id: proto::PeerId,
1216 buffer_id: BufferId,
1217 handle: OpenLspBufferHandle,
1218 ) {
1219 if let Some(shared_buffers) = self.shared_buffers.get_mut(&peer_id)
1220 && let Some(buffer) = shared_buffers.get_mut(&buffer_id)
1221 {
1222 buffer.lsp_handle = Some(handle);
1223 return;
1224 }
1225 debug_panic!("tried to register shared lsp handle, but buffer was not shared")
1226 }
1227
1228 pub fn handle_synchronize_buffers(
1229 &mut self,
1230 envelope: TypedEnvelope<proto::SynchronizeBuffers>,
1231 cx: &mut Context<Self>,
1232 client: Arc<Client>,
1233 ) -> Result<proto::SynchronizeBuffersResponse> {
1234 let project_id = envelope.payload.project_id;
1235 let mut response = proto::SynchronizeBuffersResponse {
1236 buffers: Default::default(),
1237 };
1238 let Some(guest_id) = envelope.original_sender_id else {
1239 anyhow::bail!("missing original_sender_id on SynchronizeBuffers request");
1240 };
1241
1242 self.shared_buffers.entry(guest_id).or_default().clear();
1243 for buffer in envelope.payload.buffers {
1244 let buffer_id = BufferId::new(buffer.id)?;
1245 let remote_version = language::proto::deserialize_version(&buffer.version);
1246 if let Some(buffer) = self.get(buffer_id) {
1247 self.shared_buffers
1248 .entry(guest_id)
1249 .or_default()
1250 .entry(buffer_id)
1251 .or_insert_with(|| SharedBuffer {
1252 buffer: buffer.clone(),
1253 lsp_handle: None,
1254 });
1255
1256 let buffer = buffer.read(cx);
1257 response.buffers.push(proto::BufferVersion {
1258 id: buffer_id.into(),
1259 version: language::proto::serialize_version(&buffer.version),
1260 });
1261
1262 let operations = buffer.serialize_ops(Some(remote_version), cx);
1263 let client = client.clone();
1264 if let Some(file) = buffer.file() {
1265 client
1266 .send(proto::UpdateBufferFile {
1267 project_id,
1268 buffer_id: buffer_id.into(),
1269 file: Some(file.to_proto(cx)),
1270 })
1271 .log_err();
1272 }
1273
1274 // TODO(max): do something
1275 // client
1276 // .send(proto::UpdateStagedText {
1277 // project_id,
1278 // buffer_id: buffer_id.into(),
1279 // diff_base: buffer.diff_base().map(ToString::to_string),
1280 // })
1281 // .log_err();
1282
1283 client
1284 .send(proto::BufferReloaded {
1285 project_id,
1286 buffer_id: buffer_id.into(),
1287 version: language::proto::serialize_version(buffer.saved_version()),
1288 mtime: buffer.saved_mtime().map(|time| time.into()),
1289 line_ending: language::proto::serialize_line_ending(buffer.line_ending())
1290 as i32,
1291 })
1292 .log_err();
1293
1294 cx.background_spawn(
1295 async move {
1296 let operations = operations.await;
1297 for chunk in split_operations(operations) {
1298 client
1299 .request(proto::UpdateBuffer {
1300 project_id,
1301 buffer_id: buffer_id.into(),
1302 operations: chunk,
1303 })
1304 .await?;
1305 }
1306 anyhow::Ok(())
1307 }
1308 .log_err(),
1309 )
1310 .detach();
1311 }
1312 }
1313 Ok(response)
1314 }
1315
1316 pub fn handle_create_buffer_for_peer(
1317 &mut self,
1318 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
1319 replica_id: u16,
1320 capability: Capability,
1321 cx: &mut Context<Self>,
1322 ) -> Result<()> {
1323 let remote = self
1324 .as_remote_mut()
1325 .context("buffer store is not a remote")?;
1326
1327 if let Some(buffer) =
1328 remote.handle_create_buffer_for_peer(envelope, replica_id, capability, cx)?
1329 {
1330 self.add_buffer(buffer, cx)?;
1331 }
1332
1333 Ok(())
1334 }
1335
1336 pub async fn handle_update_buffer_file(
1337 this: Entity<Self>,
1338 envelope: TypedEnvelope<proto::UpdateBufferFile>,
1339 mut cx: AsyncApp,
1340 ) -> Result<()> {
1341 let buffer_id = envelope.payload.buffer_id;
1342 let buffer_id = BufferId::new(buffer_id)?;
1343
1344 this.update(&mut cx, |this, cx| {
1345 let payload = envelope.payload.clone();
1346 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1347 let file = payload.file.context("invalid file")?;
1348 let worktree = this
1349 .worktree_store
1350 .read(cx)
1351 .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
1352 .context("no such worktree")?;
1353 let file = File::from_proto(file, worktree, cx)?;
1354 let old_file = buffer.update(cx, |buffer, cx| {
1355 let old_file = buffer.file().cloned();
1356 let new_path = file.path.clone();
1357
1358 buffer.file_updated(Arc::new(file), cx);
1359 if old_file.as_ref().is_none_or(|old| *old.path() != new_path) {
1360 Some(old_file)
1361 } else {
1362 None
1363 }
1364 });
1365 if let Some(old_file) = old_file {
1366 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
1367 }
1368 }
1369 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1370 downstream_client
1371 .send(proto::UpdateBufferFile {
1372 project_id: *project_id,
1373 buffer_id: buffer_id.into(),
1374 file: envelope.payload.file,
1375 })
1376 .log_err();
1377 }
1378 Ok(())
1379 })?
1380 }
1381
1382 pub async fn handle_save_buffer(
1383 this: Entity<Self>,
1384 envelope: TypedEnvelope<proto::SaveBuffer>,
1385 mut cx: AsyncApp,
1386 ) -> Result<proto::BufferSaved> {
1387 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1388 let (buffer, project_id) = this.read_with(&cx, |this, _| {
1389 anyhow::Ok((
1390 this.get_existing(buffer_id)?,
1391 this.downstream_client
1392 .as_ref()
1393 .map(|(_, project_id)| *project_id)
1394 .context("project is not shared")?,
1395 ))
1396 })??;
1397 buffer
1398 .update(&mut cx, |buffer, _| {
1399 buffer.wait_for_version(deserialize_version(&envelope.payload.version))
1400 })?
1401 .await?;
1402 let buffer_id = buffer.read_with(&cx, |buffer, _| buffer.remote_id())?;
1403
1404 if let Some(new_path) = envelope.payload.new_path {
1405 let new_path = ProjectPath::from_proto(new_path);
1406 this.update(&mut cx, |this, cx| {
1407 this.save_buffer_as(buffer.clone(), new_path, cx)
1408 })?
1409 .await?;
1410 } else {
1411 this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))?
1412 .await?;
1413 }
1414
1415 buffer.read_with(&cx, |buffer, _| proto::BufferSaved {
1416 project_id,
1417 buffer_id: buffer_id.into(),
1418 version: serialize_version(buffer.saved_version()),
1419 mtime: buffer.saved_mtime().map(|time| time.into()),
1420 })
1421 }
1422
1423 pub async fn handle_close_buffer(
1424 this: Entity<Self>,
1425 envelope: TypedEnvelope<proto::CloseBuffer>,
1426 mut cx: AsyncApp,
1427 ) -> Result<()> {
1428 let peer_id = envelope.sender_id;
1429 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1430 this.update(&mut cx, |this, cx| {
1431 if let Some(shared) = this.shared_buffers.get_mut(&peer_id)
1432 && shared.remove(&buffer_id).is_some()
1433 {
1434 cx.emit(BufferStoreEvent::SharedBufferClosed(peer_id, buffer_id));
1435 if shared.is_empty() {
1436 this.shared_buffers.remove(&peer_id);
1437 }
1438 return;
1439 }
1440 debug_panic!(
1441 "peer_id {} closed buffer_id {} which was either not open or already closed",
1442 peer_id,
1443 buffer_id
1444 )
1445 })
1446 }
1447
1448 pub async fn handle_buffer_saved(
1449 this: Entity<Self>,
1450 envelope: TypedEnvelope<proto::BufferSaved>,
1451 mut cx: AsyncApp,
1452 ) -> Result<()> {
1453 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1454 let version = deserialize_version(&envelope.payload.version);
1455 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1456 this.update(&mut cx, move |this, cx| {
1457 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1458 buffer.update(cx, |buffer, cx| {
1459 buffer.did_save(version, mtime, cx);
1460 });
1461 }
1462
1463 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1464 downstream_client
1465 .send(proto::BufferSaved {
1466 project_id: *project_id,
1467 buffer_id: buffer_id.into(),
1468 mtime: envelope.payload.mtime,
1469 version: envelope.payload.version,
1470 })
1471 .log_err();
1472 }
1473 })
1474 }
1475
1476 pub async fn handle_buffer_reloaded(
1477 this: Entity<Self>,
1478 envelope: TypedEnvelope<proto::BufferReloaded>,
1479 mut cx: AsyncApp,
1480 ) -> Result<()> {
1481 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1482 let version = deserialize_version(&envelope.payload.version);
1483 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1484 let line_ending = deserialize_line_ending(
1485 proto::LineEnding::from_i32(envelope.payload.line_ending)
1486 .context("missing line ending")?,
1487 );
1488 this.update(&mut cx, |this, cx| {
1489 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1490 buffer.update(cx, |buffer, cx| {
1491 buffer.did_reload(version, line_ending, mtime, cx);
1492 });
1493 }
1494
1495 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1496 downstream_client
1497 .send(proto::BufferReloaded {
1498 project_id: *project_id,
1499 buffer_id: buffer_id.into(),
1500 mtime: envelope.payload.mtime,
1501 version: envelope.payload.version,
1502 line_ending: envelope.payload.line_ending,
1503 })
1504 .log_err();
1505 }
1506 })
1507 }
1508
1509 pub fn reload_buffers(
1510 &self,
1511 buffers: HashSet<Entity<Buffer>>,
1512 push_to_history: bool,
1513 cx: &mut Context<Self>,
1514 ) -> Task<Result<ProjectTransaction>> {
1515 if buffers.is_empty() {
1516 return Task::ready(Ok(ProjectTransaction::default()));
1517 }
1518 match &self.state {
1519 BufferStoreState::Local(this) => this.reload_buffers(buffers, push_to_history, cx),
1520 BufferStoreState::Remote(this) => this.reload_buffers(buffers, push_to_history, cx),
1521 }
1522 }
1523
1524 async fn handle_reload_buffers(
1525 this: Entity<Self>,
1526 envelope: TypedEnvelope<proto::ReloadBuffers>,
1527 mut cx: AsyncApp,
1528 ) -> Result<proto::ReloadBuffersResponse> {
1529 let sender_id = envelope.original_sender_id().unwrap_or_default();
1530 let reload = this.update(&mut cx, |this, cx| {
1531 let mut buffers = HashSet::default();
1532 for buffer_id in &envelope.payload.buffer_ids {
1533 let buffer_id = BufferId::new(*buffer_id)?;
1534 buffers.insert(this.get_existing(buffer_id)?);
1535 }
1536 anyhow::Ok(this.reload_buffers(buffers, false, cx))
1537 })??;
1538
1539 let project_transaction = reload.await?;
1540 let project_transaction = this.update(&mut cx, |this, cx| {
1541 this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
1542 })?;
1543 Ok(proto::ReloadBuffersResponse {
1544 transaction: Some(project_transaction),
1545 })
1546 }
1547
1548 pub fn create_buffer_for_peer(
1549 &mut self,
1550 buffer: &Entity<Buffer>,
1551 peer_id: proto::PeerId,
1552 cx: &mut Context<Self>,
1553 ) -> Task<Result<()>> {
1554 let buffer_id = buffer.read(cx).remote_id();
1555 let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
1556 if shared_buffers.contains_key(&buffer_id) {
1557 return Task::ready(Ok(()));
1558 }
1559 shared_buffers.insert(
1560 buffer_id,
1561 SharedBuffer {
1562 buffer: buffer.clone(),
1563 lsp_handle: None,
1564 },
1565 );
1566
1567 let Some((client, project_id)) = self.downstream_client.clone() else {
1568 return Task::ready(Ok(()));
1569 };
1570
1571 cx.spawn(async move |this, cx| {
1572 let Some(buffer) = this.read_with(cx, |this, _| this.get(buffer_id))? else {
1573 return anyhow::Ok(());
1574 };
1575
1576 let operations = buffer.update(cx, |b, cx| b.serialize_ops(None, cx))?;
1577 let operations = operations.await;
1578 let state = buffer.update(cx, |buffer, cx| buffer.to_proto(cx))?;
1579
1580 let initial_state = proto::CreateBufferForPeer {
1581 project_id,
1582 peer_id: Some(peer_id),
1583 variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1584 };
1585
1586 if client.send(initial_state).log_err().is_some() {
1587 let client = client.clone();
1588 cx.background_spawn(async move {
1589 let mut chunks = split_operations(operations).peekable();
1590 while let Some(chunk) = chunks.next() {
1591 let is_last = chunks.peek().is_none();
1592 client.send(proto::CreateBufferForPeer {
1593 project_id,
1594 peer_id: Some(peer_id),
1595 variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
1596 proto::BufferChunk {
1597 buffer_id: buffer_id.into(),
1598 operations: chunk,
1599 is_last,
1600 },
1601 )),
1602 })?;
1603 }
1604 anyhow::Ok(())
1605 })
1606 .await
1607 .log_err();
1608 }
1609 Ok(())
1610 })
1611 }
1612
1613 pub fn forget_shared_buffers(&mut self) {
1614 self.shared_buffers.clear();
1615 }
1616
1617 pub fn forget_shared_buffers_for(&mut self, peer_id: &proto::PeerId) {
1618 self.shared_buffers.remove(peer_id);
1619 }
1620
1621 pub fn update_peer_id(&mut self, old_peer_id: &proto::PeerId, new_peer_id: proto::PeerId) {
1622 if let Some(buffers) = self.shared_buffers.remove(old_peer_id) {
1623 self.shared_buffers.insert(new_peer_id, buffers);
1624 }
1625 }
1626
1627 pub fn has_shared_buffers(&self) -> bool {
1628 !self.shared_buffers.is_empty()
1629 }
1630
1631 pub fn create_local_buffer(
1632 &mut self,
1633 text: &str,
1634 language: Option<Arc<Language>>,
1635 project_searchable: bool,
1636 cx: &mut Context<Self>,
1637 ) -> Entity<Buffer> {
1638 let buffer = cx.new(|cx| {
1639 Buffer::local(text, cx)
1640 .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1641 });
1642
1643 self.add_buffer(buffer.clone(), cx).log_err();
1644 let buffer_id = buffer.read(cx).remote_id();
1645 if !project_searchable {
1646 self.non_searchable_buffers.insert(buffer_id);
1647 }
1648
1649 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1650 self.path_to_buffer_id.insert(
1651 ProjectPath {
1652 worktree_id: file.worktree_id(cx),
1653 path: file.path.clone(),
1654 },
1655 buffer_id,
1656 );
1657 let this = self
1658 .as_local_mut()
1659 .expect("local-only method called in a non-local context");
1660 if let Some(entry_id) = file.entry_id {
1661 this.local_buffer_ids_by_entry_id
1662 .insert(entry_id, buffer_id);
1663 }
1664 }
1665 buffer
1666 }
1667
1668 pub fn deserialize_project_transaction(
1669 &mut self,
1670 message: proto::ProjectTransaction,
1671 push_to_history: bool,
1672 cx: &mut Context<Self>,
1673 ) -> Task<Result<ProjectTransaction>> {
1674 if let Some(this) = self.as_remote_mut() {
1675 this.deserialize_project_transaction(message, push_to_history, cx)
1676 } else {
1677 debug_panic!("not a remote buffer store");
1678 Task::ready(Err(anyhow!("not a remote buffer store")))
1679 }
1680 }
1681
1682 pub fn wait_for_remote_buffer(
1683 &mut self,
1684 id: BufferId,
1685 cx: &mut Context<BufferStore>,
1686 ) -> Task<Result<Entity<Buffer>>> {
1687 if let Some(this) = self.as_remote_mut() {
1688 this.wait_for_remote_buffer(id, cx)
1689 } else {
1690 debug_panic!("not a remote buffer store");
1691 Task::ready(Err(anyhow!("not a remote buffer store")))
1692 }
1693 }
1694
1695 pub fn serialize_project_transaction_for_peer(
1696 &mut self,
1697 project_transaction: ProjectTransaction,
1698 peer_id: proto::PeerId,
1699 cx: &mut Context<Self>,
1700 ) -> proto::ProjectTransaction {
1701 let mut serialized_transaction = proto::ProjectTransaction {
1702 buffer_ids: Default::default(),
1703 transactions: Default::default(),
1704 };
1705 for (buffer, transaction) in project_transaction.0 {
1706 self.create_buffer_for_peer(&buffer, peer_id, cx)
1707 .detach_and_log_err(cx);
1708 serialized_transaction
1709 .buffer_ids
1710 .push(buffer.read(cx).remote_id().into());
1711 serialized_transaction
1712 .transactions
1713 .push(language::proto::serialize_transaction(&transaction));
1714 }
1715 serialized_transaction
1716 }
1717}
1718
1719impl OpenBuffer {
1720 fn upgrade(&self) -> Option<Entity<Buffer>> {
1721 match self {
1722 OpenBuffer::Complete { buffer, .. } => buffer.upgrade(),
1723 OpenBuffer::Operations(_) => None,
1724 }
1725 }
1726}
1727
1728fn is_not_found_error(error: &anyhow::Error) -> bool {
1729 error
1730 .root_cause()
1731 .downcast_ref::<io::Error>()
1732 .is_some_and(|err| err.kind() == io::ErrorKind::NotFound)
1733}