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