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