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