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