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 buffer_ref = buffer.read(cx);
580 let Some(file) = File::from_dyn(buffer_ref.file()) else {
581 return Task::ready(Err(anyhow!("buffer doesn't have a file")));
582 };
583 let worktree = file.worktree.clone();
584 self.save_local_buffer(buffer, worktree, file.path.clone(), false, cx)
585 }
586
587 fn save_buffer_as(
588 &self,
589 buffer: Entity<Buffer>,
590 path: ProjectPath,
591 cx: &mut Context<BufferStore>,
592 ) -> Task<Result<()>> {
593 let Some(worktree) = self
594 .worktree_store
595 .read(cx)
596 .worktree_for_id(path.worktree_id, cx)
597 else {
598 return Task::ready(Err(anyhow!("no such worktree")));
599 };
600 self.save_local_buffer(buffer, worktree, path.path.clone(), true, cx)
601 }
602
603 fn open_buffer(
604 &self,
605 path: Arc<Path>,
606 worktree: Entity<Worktree>,
607 cx: &mut Context<BufferStore>,
608 ) -> Task<Result<Entity<Buffer>>> {
609 let load_buffer = worktree.update(cx, |worktree, cx| {
610 let load_file = worktree.load_file(path.as_ref(), cx);
611 let entity_id = cx.reserve_entity();
612 let buffer_id = BufferId::from(entity_id.as_non_zero_u64());
613 cx.spawn(async move |_, cx| {
614 let loaded = load_file.await?;
615 let text_buffer = cx
616 .background_spawn(async move { text::Buffer::new(0, buffer_id, loaded.text) })
617 .await;
618 cx.insert_entity(entity_id, |_| {
619 Buffer::build(text_buffer, Some(loaded.file), Capability::ReadWrite)
620 })
621 })
622 });
623
624 cx.spawn(async move |this, cx| {
625 let buffer = match load_buffer.await {
626 Ok(buffer) => Ok(buffer),
627 Err(error) if is_not_found_error(&error) => cx.new(|cx| {
628 let buffer_id = BufferId::from(cx.entity_id().as_non_zero_u64());
629 let text_buffer = text::Buffer::new(0, buffer_id, "");
630 Buffer::build(
631 text_buffer,
632 Some(Arc::new(File {
633 worktree,
634 path,
635 disk_state: DiskState::New,
636 entry_id: None,
637 is_local: true,
638 is_private: false,
639 })),
640 Capability::ReadWrite,
641 )
642 }),
643 Err(e) => Err(e),
644 }?;
645 this.update(cx, |this, cx| {
646 this.add_buffer(buffer.clone(), cx)?;
647 let buffer_id = buffer.read(cx).remote_id();
648 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
649 this.path_to_buffer_id.insert(
650 ProjectPath {
651 worktree_id: file.worktree_id(cx),
652 path: file.path.clone(),
653 },
654 buffer_id,
655 );
656 let this = this.as_local_mut().unwrap();
657 if let Some(entry_id) = file.entry_id {
658 this.local_buffer_ids_by_entry_id
659 .insert(entry_id, buffer_id);
660 }
661 }
662
663 anyhow::Ok(())
664 })??;
665
666 Ok(buffer)
667 })
668 }
669
670 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
671 cx.spawn(async move |buffer_store, cx| {
672 let buffer =
673 cx.new(|cx| Buffer::local("", cx).with_language(language::PLAIN_TEXT.clone(), cx))?;
674 buffer_store.update(cx, |buffer_store, cx| {
675 buffer_store.add_buffer(buffer.clone(), cx).log_err();
676 })?;
677 Ok(buffer)
678 })
679 }
680
681 fn reload_buffers(
682 &self,
683 buffers: HashSet<Entity<Buffer>>,
684 push_to_history: bool,
685 cx: &mut Context<BufferStore>,
686 ) -> Task<Result<ProjectTransaction>> {
687 cx.spawn(async move |_, cx| {
688 let mut project_transaction = ProjectTransaction::default();
689 for buffer in buffers {
690 let transaction = buffer.update(cx, |buffer, cx| buffer.reload(cx))?.await?;
691 buffer.update(cx, |buffer, cx| {
692 if let Some(transaction) = transaction {
693 if !push_to_history {
694 buffer.forget_transaction(transaction.id);
695 }
696 project_transaction.0.insert(cx.entity(), transaction);
697 }
698 })?;
699 }
700
701 Ok(project_transaction)
702 })
703 }
704}
705
706impl BufferStore {
707 pub fn init(client: &AnyProtoClient) {
708 client.add_entity_message_handler(Self::handle_buffer_reloaded);
709 client.add_entity_message_handler(Self::handle_buffer_saved);
710 client.add_entity_message_handler(Self::handle_update_buffer_file);
711 client.add_entity_request_handler(Self::handle_save_buffer);
712 client.add_entity_request_handler(Self::handle_reload_buffers);
713 }
714
715 /// Creates a buffer store, optionally retaining its buffers.
716 pub fn local(worktree_store: Entity<WorktreeStore>, cx: &mut Context<Self>) -> Self {
717 Self {
718 state: BufferStoreState::Local(LocalBufferStore {
719 local_buffer_ids_by_entry_id: Default::default(),
720 worktree_store: worktree_store.clone(),
721 _subscription: cx.subscribe(&worktree_store, |this, _, event, cx| {
722 if let WorktreeStoreEvent::WorktreeAdded(worktree) = event {
723 let this = this.as_local_mut().unwrap();
724 this.subscribe_to_worktree(worktree, cx);
725 }
726 }),
727 }),
728 downstream_client: None,
729 opened_buffers: Default::default(),
730 path_to_buffer_id: Default::default(),
731 shared_buffers: Default::default(),
732 loading_buffers: Default::default(),
733 non_searchable_buffers: Default::default(),
734 worktree_store,
735 }
736 }
737
738 pub fn remote(
739 worktree_store: Entity<WorktreeStore>,
740 upstream_client: AnyProtoClient,
741 remote_id: u64,
742 _cx: &mut Context<Self>,
743 ) -> Self {
744 Self {
745 state: BufferStoreState::Remote(RemoteBufferStore {
746 shared_with_me: Default::default(),
747 loading_remote_buffers_by_id: Default::default(),
748 remote_buffer_listeners: Default::default(),
749 project_id: remote_id,
750 upstream_client,
751 worktree_store: worktree_store.clone(),
752 }),
753 downstream_client: None,
754 opened_buffers: Default::default(),
755 path_to_buffer_id: Default::default(),
756 loading_buffers: Default::default(),
757 shared_buffers: Default::default(),
758 non_searchable_buffers: Default::default(),
759 worktree_store,
760 }
761 }
762
763 fn as_local_mut(&mut self) -> Option<&mut LocalBufferStore> {
764 match &mut self.state {
765 BufferStoreState::Local(state) => Some(state),
766 _ => None,
767 }
768 }
769
770 fn as_remote_mut(&mut self) -> Option<&mut RemoteBufferStore> {
771 match &mut self.state {
772 BufferStoreState::Remote(state) => Some(state),
773 _ => None,
774 }
775 }
776
777 fn as_remote(&self) -> Option<&RemoteBufferStore> {
778 match &self.state {
779 BufferStoreState::Remote(state) => Some(state),
780 _ => None,
781 }
782 }
783
784 pub fn open_buffer(
785 &mut self,
786 project_path: ProjectPath,
787 cx: &mut Context<Self>,
788 ) -> Task<Result<Entity<Buffer>>> {
789 if let Some(buffer) = self.get_by_path(&project_path) {
790 cx.emit(BufferStoreEvent::BufferOpened {
791 buffer: buffer.clone(),
792 project_path,
793 });
794
795 return Task::ready(Ok(buffer));
796 }
797
798 let task = match self.loading_buffers.entry(project_path.clone()) {
799 hash_map::Entry::Occupied(e) => e.get().clone(),
800 hash_map::Entry::Vacant(entry) => {
801 let path = project_path.path.clone();
802 let Some(worktree) = self
803 .worktree_store
804 .read(cx)
805 .worktree_for_id(project_path.worktree_id, cx)
806 else {
807 return Task::ready(Err(anyhow!("no such worktree")));
808 };
809 let load_buffer = match &self.state {
810 BufferStoreState::Local(this) => this.open_buffer(path, worktree, cx),
811 BufferStoreState::Remote(this) => this.open_buffer(path, worktree, cx),
812 };
813
814 entry
815 .insert(
816 cx.spawn(async move |this, cx| {
817 let load_result = load_buffer.await;
818 this.update(cx, |this, cx| {
819 // Record the fact that the buffer is no longer loading.
820 this.loading_buffers.remove(&project_path);
821
822 let buffer = load_result.map_err(Arc::new)?;
823 cx.emit(BufferStoreEvent::BufferOpened {
824 buffer: buffer.clone(),
825 project_path,
826 });
827
828 Ok(buffer)
829 })?
830 })
831 .shared(),
832 )
833 .clone()
834 }
835 };
836
837 cx.background_spawn(async move { task.await.map_err(|e| anyhow!("{e}")) })
838 }
839
840 pub fn create_buffer(&mut self, cx: &mut Context<Self>) -> Task<Result<Entity<Buffer>>> {
841 match &self.state {
842 BufferStoreState::Local(this) => this.create_buffer(cx),
843 BufferStoreState::Remote(this) => this.create_buffer(cx),
844 }
845 }
846
847 pub fn save_buffer(
848 &mut self,
849 buffer: Entity<Buffer>,
850 cx: &mut Context<Self>,
851 ) -> Task<Result<()>> {
852 match &mut self.state {
853 BufferStoreState::Local(this) => this.save_buffer(buffer, cx),
854 BufferStoreState::Remote(this) => this.save_remote_buffer(buffer.clone(), None, cx),
855 }
856 }
857
858 pub fn save_buffer_as(
859 &mut self,
860 buffer: Entity<Buffer>,
861 path: ProjectPath,
862 cx: &mut Context<Self>,
863 ) -> Task<Result<()>> {
864 let old_file = buffer.read(cx).file().cloned();
865 let task = match &self.state {
866 BufferStoreState::Local(this) => this.save_buffer_as(buffer.clone(), path, cx),
867 BufferStoreState::Remote(this) => {
868 this.save_remote_buffer(buffer.clone(), Some(path.to_proto()), cx)
869 }
870 };
871 cx.spawn(async move |this, cx| {
872 task.await?;
873 this.update(cx, |_, cx| {
874 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
875 })
876 })
877 }
878
879 fn add_buffer(&mut self, buffer_entity: Entity<Buffer>, cx: &mut Context<Self>) -> Result<()> {
880 let buffer = buffer_entity.read(cx);
881 let remote_id = buffer.remote_id();
882 let path = File::from_dyn(buffer.file()).map(|file| ProjectPath {
883 path: file.path.clone(),
884 worktree_id: file.worktree_id(cx),
885 });
886 let is_remote = buffer.replica_id() != 0;
887 let open_buffer = OpenBuffer::Complete {
888 buffer: buffer_entity.downgrade(),
889 };
890
891 let handle = cx.entity().downgrade();
892 buffer_entity.update(cx, move |_, cx| {
893 cx.on_release(move |buffer, cx| {
894 handle
895 .update(cx, |_, cx| {
896 cx.emit(BufferStoreEvent::BufferDropped(buffer.remote_id()))
897 })
898 .ok();
899 })
900 .detach()
901 });
902 let _expect_path_to_exist;
903 match self.opened_buffers.entry(remote_id) {
904 hash_map::Entry::Vacant(entry) => {
905 entry.insert(open_buffer);
906 _expect_path_to_exist = false;
907 }
908 hash_map::Entry::Occupied(mut entry) => {
909 if let OpenBuffer::Operations(operations) = entry.get_mut() {
910 buffer_entity.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx));
911 } else if entry.get().upgrade().is_some() {
912 if is_remote {
913 return Ok(());
914 } else {
915 debug_panic!("buffer {remote_id} was already registered");
916 anyhow::bail!("buffer {remote_id} was already registered");
917 }
918 }
919 entry.insert(open_buffer);
920 _expect_path_to_exist = true;
921 }
922 }
923
924 if let Some(path) = path {
925 self.path_to_buffer_id.insert(path, remote_id);
926 }
927
928 drop(buffer);
929 cx.subscribe(&buffer_entity, Self::on_buffer_event).detach();
930 cx.emit(BufferStoreEvent::BufferAdded(buffer_entity));
931 Ok(())
932 }
933
934 pub fn buffers(&self) -> impl '_ + Iterator<Item = Entity<Buffer>> {
935 self.opened_buffers
936 .values()
937 .filter_map(|buffer| buffer.upgrade())
938 }
939
940 pub fn loading_buffers(
941 &self,
942 ) -> impl Iterator<Item = (&ProjectPath, impl Future<Output = Result<Entity<Buffer>>>)> {
943 self.loading_buffers.iter().map(|(path, task)| {
944 let task = task.clone();
945 (path, async move { task.await.map_err(|e| anyhow!("{e}")) })
946 })
947 }
948
949 pub fn buffer_id_for_project_path(&self, project_path: &ProjectPath) -> Option<&BufferId> {
950 self.path_to_buffer_id.get(project_path)
951 }
952
953 pub fn get_by_path(&self, path: &ProjectPath) -> Option<Entity<Buffer>> {
954 self.path_to_buffer_id.get(path).and_then(|buffer_id| {
955 let buffer = self.get(*buffer_id);
956 buffer
957 })
958 }
959
960 pub fn get(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
961 self.opened_buffers.get(&buffer_id)?.upgrade()
962 }
963
964 pub fn get_existing(&self, buffer_id: BufferId) -> Result<Entity<Buffer>> {
965 self.get(buffer_id)
966 .with_context(|| format!("unknown buffer id {buffer_id}"))
967 }
968
969 pub fn get_possibly_incomplete(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
970 self.get(buffer_id).or_else(|| {
971 self.as_remote()
972 .and_then(|remote| remote.loading_remote_buffers_by_id.get(&buffer_id).cloned())
973 })
974 }
975
976 pub fn buffer_version_info(&self, cx: &App) -> (Vec<proto::BufferVersion>, Vec<BufferId>) {
977 let buffers = self
978 .buffers()
979 .map(|buffer| {
980 let buffer = buffer.read(cx);
981 proto::BufferVersion {
982 id: buffer.remote_id().into(),
983 version: language::proto::serialize_version(&buffer.version),
984 }
985 })
986 .collect();
987 let incomplete_buffer_ids = self
988 .as_remote()
989 .map(|remote| remote.incomplete_buffer_ids())
990 .unwrap_or_default();
991 (buffers, incomplete_buffer_ids)
992 }
993
994 pub fn disconnected_from_host(&mut self, cx: &mut App) {
995 for open_buffer in self.opened_buffers.values_mut() {
996 if let Some(buffer) = open_buffer.upgrade() {
997 buffer.update(cx, |buffer, _| buffer.give_up_waiting());
998 }
999 }
1000
1001 for buffer in self.buffers() {
1002 buffer.update(cx, |buffer, cx| {
1003 buffer.set_capability(Capability::ReadOnly, cx)
1004 });
1005 }
1006
1007 if let Some(remote) = self.as_remote_mut() {
1008 // Wake up all futures currently waiting on a buffer to get opened,
1009 // to give them a chance to fail now that we've disconnected.
1010 remote.remote_buffer_listeners.clear()
1011 }
1012 }
1013
1014 pub fn shared(&mut self, remote_id: u64, downstream_client: AnyProtoClient, _cx: &mut App) {
1015 self.downstream_client = Some((downstream_client, remote_id));
1016 }
1017
1018 pub fn unshared(&mut self, _cx: &mut Context<Self>) {
1019 self.downstream_client.take();
1020 self.forget_shared_buffers();
1021 }
1022
1023 pub fn discard_incomplete(&mut self) {
1024 self.opened_buffers
1025 .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
1026 }
1027
1028 fn buffer_changed_file(&mut self, buffer: Entity<Buffer>, cx: &mut App) -> Option<()> {
1029 let file = File::from_dyn(buffer.read(cx).file())?;
1030
1031 let remote_id = buffer.read(cx).remote_id();
1032 if let Some(entry_id) = file.entry_id {
1033 if let Some(local) = self.as_local_mut() {
1034 match local.local_buffer_ids_by_entry_id.get(&entry_id) {
1035 Some(_) => {
1036 return None;
1037 }
1038 None => {
1039 local
1040 .local_buffer_ids_by_entry_id
1041 .insert(entry_id, remote_id);
1042 }
1043 }
1044 }
1045 self.path_to_buffer_id.insert(
1046 ProjectPath {
1047 worktree_id: file.worktree_id(cx),
1048 path: file.path.clone(),
1049 },
1050 remote_id,
1051 );
1052 };
1053
1054 Some(())
1055 }
1056
1057 pub fn find_search_candidates(
1058 &mut self,
1059 query: &SearchQuery,
1060 mut limit: usize,
1061 fs: Arc<dyn Fs>,
1062 cx: &mut Context<Self>,
1063 ) -> Receiver<Entity<Buffer>> {
1064 let (tx, rx) = smol::channel::unbounded();
1065 let mut open_buffers = HashSet::default();
1066 let mut unnamed_buffers = Vec::new();
1067 for handle in self.buffers() {
1068 let buffer = handle.read(cx);
1069 if self.non_searchable_buffers.contains(&buffer.remote_id()) {
1070 continue;
1071 } else if let Some(entry_id) = buffer.entry_id(cx) {
1072 open_buffers.insert(entry_id);
1073 } else {
1074 limit = limit.saturating_sub(1);
1075 unnamed_buffers.push(handle)
1076 };
1077 }
1078
1079 const MAX_CONCURRENT_BUFFER_OPENS: usize = 64;
1080 let project_paths_rx = self
1081 .worktree_store
1082 .update(cx, |worktree_store, cx| {
1083 worktree_store.find_search_candidates(query.clone(), limit, open_buffers, fs, cx)
1084 })
1085 .chunks(MAX_CONCURRENT_BUFFER_OPENS);
1086
1087 cx.spawn(async move |this, cx| {
1088 for buffer in unnamed_buffers {
1089 tx.send(buffer).await.ok();
1090 }
1091
1092 let mut project_paths_rx = pin!(project_paths_rx);
1093 while let Some(project_paths) = project_paths_rx.next().await {
1094 let buffers = this.update(cx, |this, cx| {
1095 project_paths
1096 .into_iter()
1097 .map(|project_path| this.open_buffer(project_path, cx))
1098 .collect::<Vec<_>>()
1099 })?;
1100 for buffer_task in buffers {
1101 if let Some(buffer) = buffer_task.await.log_err() {
1102 if tx.send(buffer).await.is_err() {
1103 return anyhow::Ok(());
1104 }
1105 }
1106 }
1107 }
1108 anyhow::Ok(())
1109 })
1110 .detach();
1111 rx
1112 }
1113
1114 fn on_buffer_event(
1115 &mut self,
1116 buffer: Entity<Buffer>,
1117 event: &BufferEvent,
1118 cx: &mut Context<Self>,
1119 ) {
1120 match event {
1121 BufferEvent::FileHandleChanged => {
1122 self.buffer_changed_file(buffer, cx);
1123 }
1124 BufferEvent::Reloaded => {
1125 let Some((downstream_client, project_id)) = self.downstream_client.as_ref() else {
1126 return;
1127 };
1128 let buffer = buffer.read(cx);
1129 downstream_client
1130 .send(proto::BufferReloaded {
1131 project_id: *project_id,
1132 buffer_id: buffer.remote_id().to_proto(),
1133 version: serialize_version(&buffer.version()),
1134 mtime: buffer.saved_mtime().map(|t| t.into()),
1135 line_ending: serialize_line_ending(buffer.line_ending()) as i32,
1136 })
1137 .log_err();
1138 }
1139 BufferEvent::LanguageChanged => {}
1140 _ => {}
1141 }
1142 }
1143
1144 pub async fn handle_update_buffer(
1145 this: Entity<Self>,
1146 envelope: TypedEnvelope<proto::UpdateBuffer>,
1147 mut cx: AsyncApp,
1148 ) -> Result<proto::Ack> {
1149 let payload = envelope.payload.clone();
1150 let buffer_id = BufferId::new(payload.buffer_id)?;
1151 let ops = payload
1152 .operations
1153 .into_iter()
1154 .map(language::proto::deserialize_operation)
1155 .collect::<Result<Vec<_>, _>>()?;
1156 this.update(&mut cx, |this, cx| {
1157 match this.opened_buffers.entry(buffer_id) {
1158 hash_map::Entry::Occupied(mut e) => match e.get_mut() {
1159 OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
1160 OpenBuffer::Complete { buffer, .. } => {
1161 if let Some(buffer) = buffer.upgrade() {
1162 buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx));
1163 }
1164 }
1165 },
1166 hash_map::Entry::Vacant(e) => {
1167 e.insert(OpenBuffer::Operations(ops));
1168 }
1169 }
1170 Ok(proto::Ack {})
1171 })?
1172 }
1173
1174 pub fn register_shared_lsp_handle(
1175 &mut self,
1176 peer_id: proto::PeerId,
1177 buffer_id: BufferId,
1178 handle: OpenLspBufferHandle,
1179 ) {
1180 if let Some(shared_buffers) = self.shared_buffers.get_mut(&peer_id) {
1181 if let Some(buffer) = shared_buffers.get_mut(&buffer_id) {
1182 buffer.lsp_handle = Some(handle);
1183 return;
1184 }
1185 }
1186 debug_panic!("tried to register shared lsp handle, but buffer was not shared")
1187 }
1188
1189 pub fn handle_synchronize_buffers(
1190 &mut self,
1191 envelope: TypedEnvelope<proto::SynchronizeBuffers>,
1192 cx: &mut Context<Self>,
1193 client: Arc<Client>,
1194 ) -> Result<proto::SynchronizeBuffersResponse> {
1195 let project_id = envelope.payload.project_id;
1196 let mut response = proto::SynchronizeBuffersResponse {
1197 buffers: Default::default(),
1198 };
1199 let Some(guest_id) = envelope.original_sender_id else {
1200 anyhow::bail!("missing original_sender_id on SynchronizeBuffers request");
1201 };
1202
1203 self.shared_buffers.entry(guest_id).or_default().clear();
1204 for buffer in envelope.payload.buffers {
1205 let buffer_id = BufferId::new(buffer.id)?;
1206 let remote_version = language::proto::deserialize_version(&buffer.version);
1207 if let Some(buffer) = self.get(buffer_id) {
1208 self.shared_buffers
1209 .entry(guest_id)
1210 .or_default()
1211 .entry(buffer_id)
1212 .or_insert_with(|| SharedBuffer {
1213 buffer: buffer.clone(),
1214 lsp_handle: None,
1215 });
1216
1217 let buffer = buffer.read(cx);
1218 response.buffers.push(proto::BufferVersion {
1219 id: buffer_id.into(),
1220 version: language::proto::serialize_version(&buffer.version),
1221 });
1222
1223 let operations = buffer.serialize_ops(Some(remote_version), cx);
1224 let client = client.clone();
1225 if let Some(file) = buffer.file() {
1226 client
1227 .send(proto::UpdateBufferFile {
1228 project_id,
1229 buffer_id: buffer_id.into(),
1230 file: Some(file.to_proto(cx)),
1231 })
1232 .log_err();
1233 }
1234
1235 // TODO(max): do something
1236 // client
1237 // .send(proto::UpdateStagedText {
1238 // project_id,
1239 // buffer_id: buffer_id.into(),
1240 // diff_base: buffer.diff_base().map(ToString::to_string),
1241 // })
1242 // .log_err();
1243
1244 client
1245 .send(proto::BufferReloaded {
1246 project_id,
1247 buffer_id: buffer_id.into(),
1248 version: language::proto::serialize_version(buffer.saved_version()),
1249 mtime: buffer.saved_mtime().map(|time| time.into()),
1250 line_ending: language::proto::serialize_line_ending(buffer.line_ending())
1251 as i32,
1252 })
1253 .log_err();
1254
1255 cx.background_spawn(
1256 async move {
1257 let operations = operations.await;
1258 for chunk in split_operations(operations) {
1259 client
1260 .request(proto::UpdateBuffer {
1261 project_id,
1262 buffer_id: buffer_id.into(),
1263 operations: chunk,
1264 })
1265 .await?;
1266 }
1267 anyhow::Ok(())
1268 }
1269 .log_err(),
1270 )
1271 .detach();
1272 }
1273 }
1274 Ok(response)
1275 }
1276
1277 pub fn handle_create_buffer_for_peer(
1278 &mut self,
1279 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
1280 replica_id: u16,
1281 capability: Capability,
1282 cx: &mut Context<Self>,
1283 ) -> Result<()> {
1284 let remote = self
1285 .as_remote_mut()
1286 .context("buffer store is not a remote")?;
1287
1288 if let Some(buffer) =
1289 remote.handle_create_buffer_for_peer(envelope, replica_id, capability, cx)?
1290 {
1291 self.add_buffer(buffer, cx)?;
1292 }
1293
1294 Ok(())
1295 }
1296
1297 pub async fn handle_update_buffer_file(
1298 this: Entity<Self>,
1299 envelope: TypedEnvelope<proto::UpdateBufferFile>,
1300 mut cx: AsyncApp,
1301 ) -> Result<()> {
1302 let buffer_id = envelope.payload.buffer_id;
1303 let buffer_id = BufferId::new(buffer_id)?;
1304
1305 this.update(&mut cx, |this, cx| {
1306 let payload = envelope.payload.clone();
1307 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1308 let file = payload.file.context("invalid file")?;
1309 let worktree = this
1310 .worktree_store
1311 .read(cx)
1312 .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
1313 .context("no such worktree")?;
1314 let file = File::from_proto(file, worktree, cx)?;
1315 let old_file = buffer.update(cx, |buffer, cx| {
1316 let old_file = buffer.file().cloned();
1317 let new_path = file.path.clone();
1318
1319 buffer.file_updated(Arc::new(file), cx);
1320 if old_file
1321 .as_ref()
1322 .map_or(true, |old| *old.path() != new_path)
1323 {
1324 Some(old_file)
1325 } else {
1326 None
1327 }
1328 });
1329 if let Some(old_file) = old_file {
1330 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
1331 }
1332 }
1333 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1334 downstream_client
1335 .send(proto::UpdateBufferFile {
1336 project_id: *project_id,
1337 buffer_id: buffer_id.into(),
1338 file: envelope.payload.file,
1339 })
1340 .log_err();
1341 }
1342 Ok(())
1343 })?
1344 }
1345
1346 pub async fn handle_save_buffer(
1347 this: Entity<Self>,
1348 envelope: TypedEnvelope<proto::SaveBuffer>,
1349 mut cx: AsyncApp,
1350 ) -> Result<proto::BufferSaved> {
1351 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1352 let (buffer, project_id) = this.read_with(&mut cx, |this, _| {
1353 anyhow::Ok((
1354 this.get_existing(buffer_id)?,
1355 this.downstream_client
1356 .as_ref()
1357 .map(|(_, project_id)| *project_id)
1358 .context("project is not shared")?,
1359 ))
1360 })??;
1361 buffer
1362 .update(&mut cx, |buffer, _| {
1363 buffer.wait_for_version(deserialize_version(&envelope.payload.version))
1364 })?
1365 .await?;
1366 let buffer_id = buffer.read_with(&mut cx, |buffer, _| buffer.remote_id())?;
1367
1368 if let Some(new_path) = envelope.payload.new_path {
1369 let new_path = ProjectPath::from_proto(new_path);
1370 this.update(&mut cx, |this, cx| {
1371 this.save_buffer_as(buffer.clone(), new_path, cx)
1372 })?
1373 .await?;
1374 } else {
1375 this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))?
1376 .await?;
1377 }
1378
1379 buffer.read_with(&mut cx, |buffer, _| proto::BufferSaved {
1380 project_id,
1381 buffer_id: buffer_id.into(),
1382 version: serialize_version(buffer.saved_version()),
1383 mtime: buffer.saved_mtime().map(|time| time.into()),
1384 })
1385 }
1386
1387 pub async fn handle_close_buffer(
1388 this: Entity<Self>,
1389 envelope: TypedEnvelope<proto::CloseBuffer>,
1390 mut cx: AsyncApp,
1391 ) -> Result<()> {
1392 let peer_id = envelope.sender_id;
1393 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1394 this.update(&mut cx, |this, cx| {
1395 if let Some(shared) = this.shared_buffers.get_mut(&peer_id) {
1396 if shared.remove(&buffer_id).is_some() {
1397 cx.emit(BufferStoreEvent::SharedBufferClosed(peer_id, buffer_id));
1398 if shared.is_empty() {
1399 this.shared_buffers.remove(&peer_id);
1400 }
1401 return;
1402 }
1403 }
1404 debug_panic!(
1405 "peer_id {} closed buffer_id {} which was either not open or already closed",
1406 peer_id,
1407 buffer_id
1408 )
1409 })
1410 }
1411
1412 pub async fn handle_buffer_saved(
1413 this: Entity<Self>,
1414 envelope: TypedEnvelope<proto::BufferSaved>,
1415 mut cx: AsyncApp,
1416 ) -> Result<()> {
1417 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1418 let version = deserialize_version(&envelope.payload.version);
1419 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1420 this.update(&mut cx, move |this, cx| {
1421 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1422 buffer.update(cx, |buffer, cx| {
1423 buffer.did_save(version, mtime, cx);
1424 });
1425 }
1426
1427 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1428 downstream_client
1429 .send(proto::BufferSaved {
1430 project_id: *project_id,
1431 buffer_id: buffer_id.into(),
1432 mtime: envelope.payload.mtime,
1433 version: envelope.payload.version,
1434 })
1435 .log_err();
1436 }
1437 })
1438 }
1439
1440 pub async fn handle_buffer_reloaded(
1441 this: Entity<Self>,
1442 envelope: TypedEnvelope<proto::BufferReloaded>,
1443 mut cx: AsyncApp,
1444 ) -> Result<()> {
1445 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1446 let version = deserialize_version(&envelope.payload.version);
1447 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1448 let line_ending = deserialize_line_ending(
1449 proto::LineEnding::from_i32(envelope.payload.line_ending)
1450 .context("missing line ending")?,
1451 );
1452 this.update(&mut cx, |this, cx| {
1453 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1454 buffer.update(cx, |buffer, cx| {
1455 buffer.did_reload(version, line_ending, mtime, cx);
1456 });
1457 }
1458
1459 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1460 downstream_client
1461 .send(proto::BufferReloaded {
1462 project_id: *project_id,
1463 buffer_id: buffer_id.into(),
1464 mtime: envelope.payload.mtime,
1465 version: envelope.payload.version,
1466 line_ending: envelope.payload.line_ending,
1467 })
1468 .log_err();
1469 }
1470 })
1471 }
1472
1473 pub fn reload_buffers(
1474 &self,
1475 buffers: HashSet<Entity<Buffer>>,
1476 push_to_history: bool,
1477 cx: &mut Context<Self>,
1478 ) -> Task<Result<ProjectTransaction>> {
1479 if buffers.is_empty() {
1480 return Task::ready(Ok(ProjectTransaction::default()));
1481 }
1482 match &self.state {
1483 BufferStoreState::Local(this) => this.reload_buffers(buffers, push_to_history, cx),
1484 BufferStoreState::Remote(this) => this.reload_buffers(buffers, push_to_history, cx),
1485 }
1486 }
1487
1488 async fn handle_reload_buffers(
1489 this: Entity<Self>,
1490 envelope: TypedEnvelope<proto::ReloadBuffers>,
1491 mut cx: AsyncApp,
1492 ) -> Result<proto::ReloadBuffersResponse> {
1493 let sender_id = envelope.original_sender_id().unwrap_or_default();
1494 let reload = this.update(&mut cx, |this, cx| {
1495 let mut buffers = HashSet::default();
1496 for buffer_id in &envelope.payload.buffer_ids {
1497 let buffer_id = BufferId::new(*buffer_id)?;
1498 buffers.insert(this.get_existing(buffer_id)?);
1499 }
1500 anyhow::Ok(this.reload_buffers(buffers, false, cx))
1501 })??;
1502
1503 let project_transaction = reload.await?;
1504 let project_transaction = this.update(&mut cx, |this, cx| {
1505 this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
1506 })?;
1507 Ok(proto::ReloadBuffersResponse {
1508 transaction: Some(project_transaction),
1509 })
1510 }
1511
1512 pub fn create_buffer_for_peer(
1513 &mut self,
1514 buffer: &Entity<Buffer>,
1515 peer_id: proto::PeerId,
1516 cx: &mut Context<Self>,
1517 ) -> Task<Result<()>> {
1518 let buffer_id = buffer.read(cx).remote_id();
1519 let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
1520 if shared_buffers.contains_key(&buffer_id) {
1521 return Task::ready(Ok(()));
1522 }
1523 shared_buffers.insert(
1524 buffer_id,
1525 SharedBuffer {
1526 buffer: buffer.clone(),
1527 lsp_handle: None,
1528 },
1529 );
1530
1531 let Some((client, project_id)) = self.downstream_client.clone() else {
1532 return Task::ready(Ok(()));
1533 };
1534
1535 cx.spawn(async move |this, cx| {
1536 let Some(buffer) = this.read_with(cx, |this, _| this.get(buffer_id))? else {
1537 return anyhow::Ok(());
1538 };
1539
1540 let operations = buffer.update(cx, |b, cx| b.serialize_ops(None, cx))?;
1541 let operations = operations.await;
1542 let state = buffer.update(cx, |buffer, cx| buffer.to_proto(cx))?;
1543
1544 let initial_state = proto::CreateBufferForPeer {
1545 project_id,
1546 peer_id: Some(peer_id),
1547 variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1548 };
1549
1550 if client.send(initial_state).log_err().is_some() {
1551 let client = client.clone();
1552 cx.background_spawn(async move {
1553 let mut chunks = split_operations(operations).peekable();
1554 while let Some(chunk) = chunks.next() {
1555 let is_last = chunks.peek().is_none();
1556 client.send(proto::CreateBufferForPeer {
1557 project_id,
1558 peer_id: Some(peer_id),
1559 variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
1560 proto::BufferChunk {
1561 buffer_id: buffer_id.into(),
1562 operations: chunk,
1563 is_last,
1564 },
1565 )),
1566 })?;
1567 }
1568 anyhow::Ok(())
1569 })
1570 .await
1571 .log_err();
1572 }
1573 Ok(())
1574 })
1575 }
1576
1577 pub fn forget_shared_buffers(&mut self) {
1578 self.shared_buffers.clear();
1579 }
1580
1581 pub fn forget_shared_buffers_for(&mut self, peer_id: &proto::PeerId) {
1582 self.shared_buffers.remove(peer_id);
1583 }
1584
1585 pub fn update_peer_id(&mut self, old_peer_id: &proto::PeerId, new_peer_id: proto::PeerId) {
1586 if let Some(buffers) = self.shared_buffers.remove(old_peer_id) {
1587 self.shared_buffers.insert(new_peer_id, buffers);
1588 }
1589 }
1590
1591 pub fn has_shared_buffers(&self) -> bool {
1592 !self.shared_buffers.is_empty()
1593 }
1594
1595 pub fn create_local_buffer(
1596 &mut self,
1597 text: &str,
1598 language: Option<Arc<Language>>,
1599 cx: &mut Context<Self>,
1600 ) -> Entity<Buffer> {
1601 let buffer = cx.new(|cx| {
1602 Buffer::local(text, cx)
1603 .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1604 });
1605
1606 self.add_buffer(buffer.clone(), cx).log_err();
1607 let buffer_id = buffer.read(cx).remote_id();
1608
1609 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1610 self.path_to_buffer_id.insert(
1611 ProjectPath {
1612 worktree_id: file.worktree_id(cx),
1613 path: file.path.clone(),
1614 },
1615 buffer_id,
1616 );
1617 let this = self
1618 .as_local_mut()
1619 .expect("local-only method called in a non-local context");
1620 if let Some(entry_id) = file.entry_id {
1621 this.local_buffer_ids_by_entry_id
1622 .insert(entry_id, buffer_id);
1623 }
1624 }
1625 buffer
1626 }
1627
1628 pub fn deserialize_project_transaction(
1629 &mut self,
1630 message: proto::ProjectTransaction,
1631 push_to_history: bool,
1632 cx: &mut Context<Self>,
1633 ) -> Task<Result<ProjectTransaction>> {
1634 if let Some(this) = self.as_remote_mut() {
1635 this.deserialize_project_transaction(message, push_to_history, cx)
1636 } else {
1637 debug_panic!("not a remote buffer store");
1638 Task::ready(Err(anyhow!("not a remote buffer store")))
1639 }
1640 }
1641
1642 pub fn wait_for_remote_buffer(
1643 &mut self,
1644 id: BufferId,
1645 cx: &mut Context<BufferStore>,
1646 ) -> Task<Result<Entity<Buffer>>> {
1647 if let Some(this) = self.as_remote_mut() {
1648 this.wait_for_remote_buffer(id, cx)
1649 } else {
1650 debug_panic!("not a remote buffer store");
1651 Task::ready(Err(anyhow!("not a remote buffer store")))
1652 }
1653 }
1654
1655 pub fn serialize_project_transaction_for_peer(
1656 &mut self,
1657 project_transaction: ProjectTransaction,
1658 peer_id: proto::PeerId,
1659 cx: &mut Context<Self>,
1660 ) -> proto::ProjectTransaction {
1661 let mut serialized_transaction = proto::ProjectTransaction {
1662 buffer_ids: Default::default(),
1663 transactions: Default::default(),
1664 };
1665 for (buffer, transaction) in project_transaction.0 {
1666 self.create_buffer_for_peer(&buffer, peer_id, cx)
1667 .detach_and_log_err(cx);
1668 serialized_transaction
1669 .buffer_ids
1670 .push(buffer.read(cx).remote_id().into());
1671 serialized_transaction
1672 .transactions
1673 .push(language::proto::serialize_transaction(&transaction));
1674 }
1675 serialized_transaction
1676 }
1677
1678 pub(crate) fn mark_buffer_as_non_searchable(&mut self, buffer_id: BufferId) {
1679 self.non_searchable_buffers.insert(buffer_id);
1680 }
1681}
1682
1683impl OpenBuffer {
1684 fn upgrade(&self) -> Option<Entity<Buffer>> {
1685 match self {
1686 OpenBuffer::Complete { buffer, .. } => buffer.upgrade(),
1687 OpenBuffer::Operations(_) => None,
1688 }
1689 }
1690}
1691
1692fn is_not_found_error(error: &anyhow::Error) -> bool {
1693 error
1694 .root_cause()
1695 .downcast_ref::<io::Error>()
1696 .is_some_and(|err| err.kind() == io::ErrorKind::NotFound)
1697}