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 downstream_client: Option<(AnyProtoClient, u64)>,
40 shared_buffers: HashMap<proto::PeerId, HashMap<BufferId, SharedBuffer>>,
41}
42
43#[derive(Hash, Eq, PartialEq, Clone)]
44struct SharedBuffer {
45 buffer: Entity<Buffer>,
46 lsp_handle: Option<OpenLspBufferHandle>,
47}
48
49enum BufferStoreState {
50 Local(LocalBufferStore),
51 Remote(RemoteBufferStore),
52}
53
54struct RemoteBufferStore {
55 shared_with_me: HashSet<Entity<Buffer>>,
56 upstream_client: AnyProtoClient,
57 project_id: u64,
58 loading_remote_buffers_by_id: HashMap<BufferId, Entity<Buffer>>,
59 remote_buffer_listeners:
60 HashMap<BufferId, Vec<oneshot::Sender<Result<Entity<Buffer>, anyhow::Error>>>>,
61 worktree_store: Entity<WorktreeStore>,
62}
63
64struct LocalBufferStore {
65 local_buffer_ids_by_path: HashMap<ProjectPath, BufferId>,
66 local_buffer_ids_by_entry_id: HashMap<ProjectEntryId, BufferId>,
67 worktree_store: Entity<WorktreeStore>,
68 _subscription: Subscription,
69}
70
71enum OpenBuffer {
72 Complete { buffer: WeakEntity<Buffer> },
73 Operations(Vec<Operation>),
74}
75
76pub enum BufferStoreEvent {
77 BufferAdded(Entity<Buffer>),
78 BufferOpened {
79 buffer: Entity<Buffer>,
80 project_path: ProjectPath,
81 },
82 SharedBufferClosed(proto::PeerId, BufferId),
83 BufferDropped(BufferId),
84 BufferChangedFilePath {
85 buffer: Entity<Buffer>,
86 old_file: Option<Arc<dyn language::File>>,
87 },
88}
89
90#[derive(Default, Debug)]
91pub struct ProjectTransaction(pub HashMap<Entity<Buffer>, language::Transaction>);
92
93impl EventEmitter<BufferStoreEvent> for BufferStore {}
94
95impl RemoteBufferStore {
96 pub fn wait_for_remote_buffer(
97 &mut self,
98 id: BufferId,
99 cx: &mut Context<BufferStore>,
100 ) -> Task<Result<Entity<Buffer>>> {
101 let (tx, rx) = oneshot::channel();
102 self.remote_buffer_listeners.entry(id).or_default().push(tx);
103
104 cx.spawn(async move |this, cx| {
105 if let Some(buffer) = this
106 .read_with(cx, |buffer_store, _| buffer_store.get(id))
107 .ok()
108 .flatten()
109 {
110 return Ok(buffer);
111 }
112
113 cx.background_spawn(async move { rx.await? }).await
114 })
115 }
116
117 fn save_remote_buffer(
118 &self,
119 buffer_handle: Entity<Buffer>,
120 new_path: Option<proto::ProjectPath>,
121 cx: &Context<BufferStore>,
122 ) -> Task<Result<()>> {
123 let buffer = buffer_handle.read(cx);
124 let buffer_id = buffer.remote_id().into();
125 let version = buffer.version();
126 let rpc = self.upstream_client.clone();
127 let project_id = self.project_id;
128 cx.spawn(async move |_, cx| {
129 let response = rpc
130 .request(proto::SaveBuffer {
131 project_id,
132 buffer_id,
133 new_path,
134 version: serialize_version(&version),
135 })
136 .await?;
137 let version = deserialize_version(&response.version);
138 let mtime = response.mtime.map(|mtime| mtime.into());
139
140 buffer_handle.update(cx, |buffer, cx| {
141 buffer.did_save(version.clone(), mtime, cx);
142 })?;
143
144 Ok(())
145 })
146 }
147
148 pub fn handle_create_buffer_for_peer(
149 &mut self,
150 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
151 replica_id: u16,
152 capability: Capability,
153 cx: &mut Context<BufferStore>,
154 ) -> Result<Option<Entity<Buffer>>> {
155 match envelope
156 .payload
157 .variant
158 .ok_or_else(|| anyhow!("missing variant"))?
159 {
160 proto::create_buffer_for_peer::Variant::State(mut state) => {
161 let buffer_id = BufferId::new(state.id)?;
162
163 let buffer_result = maybe!({
164 let mut buffer_file = None;
165 if let Some(file) = state.file.take() {
166 let worktree_id = worktree::WorktreeId::from_proto(file.worktree_id);
167 let worktree = self
168 .worktree_store
169 .read(cx)
170 .worktree_for_id(worktree_id, cx)
171 .ok_or_else(|| {
172 anyhow!("no worktree found for id {}", file.worktree_id)
173 })?;
174 buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
175 as Arc<dyn language::File>);
176 }
177 Buffer::from_proto(replica_id, capability, state, buffer_file)
178 });
179
180 match buffer_result {
181 Ok(buffer) => {
182 let buffer = cx.new(|_| buffer);
183 self.loading_remote_buffers_by_id.insert(buffer_id, buffer);
184 }
185 Err(error) => {
186 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
187 for listener in listeners {
188 listener.send(Err(anyhow!(error.cloned()))).ok();
189 }
190 }
191 }
192 }
193 }
194 proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
195 let buffer_id = BufferId::new(chunk.buffer_id)?;
196 let buffer = self
197 .loading_remote_buffers_by_id
198 .get(&buffer_id)
199 .cloned()
200 .ok_or_else(|| {
201 anyhow!(
202 "received chunk for buffer {} without initial state",
203 chunk.buffer_id
204 )
205 })?;
206
207 let result = maybe!({
208 let operations = chunk
209 .operations
210 .into_iter()
211 .map(language::proto::deserialize_operation)
212 .collect::<Result<Vec<_>>>()?;
213 buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx));
214 anyhow::Ok(())
215 });
216
217 if let Err(error) = result {
218 self.loading_remote_buffers_by_id.remove(&buffer_id);
219 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
220 for listener in listeners {
221 listener.send(Err(error.cloned())).ok();
222 }
223 }
224 } else if chunk.is_last {
225 self.loading_remote_buffers_by_id.remove(&buffer_id);
226 if self.upstream_client.is_via_collab() {
227 // retain buffers sent by peers to avoid races.
228 self.shared_with_me.insert(buffer.clone());
229 }
230
231 if let Some(senders) = self.remote_buffer_listeners.remove(&buffer_id) {
232 for sender in senders {
233 sender.send(Ok(buffer.clone())).ok();
234 }
235 }
236 return Ok(Some(buffer));
237 }
238 }
239 }
240 return Ok(None);
241 }
242
243 pub fn incomplete_buffer_ids(&self) -> Vec<BufferId> {
244 self.loading_remote_buffers_by_id
245 .keys()
246 .copied()
247 .collect::<Vec<_>>()
248 }
249
250 pub fn deserialize_project_transaction(
251 &self,
252 message: proto::ProjectTransaction,
253 push_to_history: bool,
254 cx: &mut Context<BufferStore>,
255 ) -> Task<Result<ProjectTransaction>> {
256 cx.spawn(async move |this, cx| {
257 let mut project_transaction = ProjectTransaction::default();
258 for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
259 {
260 let buffer_id = BufferId::new(buffer_id)?;
261 let buffer = this
262 .update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
263 .await?;
264 let transaction = language::proto::deserialize_transaction(transaction)?;
265 project_transaction.0.insert(buffer, transaction);
266 }
267
268 for (buffer, transaction) in &project_transaction.0 {
269 buffer
270 .update(cx, |buffer, _| {
271 buffer.wait_for_edits(transaction.edit_ids.iter().copied())
272 })?
273 .await?;
274
275 if push_to_history {
276 buffer.update(cx, |buffer, _| {
277 buffer.push_transaction(transaction.clone(), Instant::now());
278 buffer.finalize_last_transaction();
279 })?;
280 }
281 }
282
283 Ok(project_transaction)
284 })
285 }
286
287 fn open_buffer(
288 &self,
289 path: Arc<Path>,
290 worktree: Entity<Worktree>,
291 cx: &mut Context<BufferStore>,
292 ) -> Task<Result<Entity<Buffer>>> {
293 let worktree_id = worktree.read(cx).id().to_proto();
294 let project_id = self.project_id;
295 let client = self.upstream_client.clone();
296 cx.spawn(async move |this, cx| {
297 let response = client
298 .request(proto::OpenBufferByPath {
299 project_id,
300 worktree_id,
301 path: path.to_proto(),
302 })
303 .await?;
304 let buffer_id = BufferId::new(response.buffer_id)?;
305
306 let buffer = this
307 .update(cx, {
308 |this, cx| this.wait_for_remote_buffer(buffer_id, cx)
309 })?
310 .await?;
311
312 Ok(buffer)
313 })
314 }
315
316 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
317 let create = self.upstream_client.request(proto::OpenNewBuffer {
318 project_id: self.project_id,
319 });
320 cx.spawn(async move |this, cx| {
321 let response = create.await?;
322 let buffer_id = BufferId::new(response.buffer_id)?;
323
324 this.update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
325 .await
326 })
327 }
328
329 fn reload_buffers(
330 &self,
331 buffers: HashSet<Entity<Buffer>>,
332 push_to_history: bool,
333 cx: &mut Context<BufferStore>,
334 ) -> Task<Result<ProjectTransaction>> {
335 let request = self.upstream_client.request(proto::ReloadBuffers {
336 project_id: self.project_id,
337 buffer_ids: buffers
338 .iter()
339 .map(|buffer| buffer.read(cx).remote_id().to_proto())
340 .collect(),
341 });
342
343 cx.spawn(async move |this, cx| {
344 let response = request
345 .await?
346 .transaction
347 .ok_or_else(|| anyhow!("missing transaction"))?;
348 this.update(cx, |this, cx| {
349 this.deserialize_project_transaction(response, push_to_history, cx)
350 })?
351 .await
352 })
353 }
354}
355
356impl LocalBufferStore {
357 fn save_local_buffer(
358 &self,
359 buffer_handle: Entity<Buffer>,
360 worktree: Entity<Worktree>,
361 path: Arc<Path>,
362 mut has_changed_file: bool,
363 cx: &mut Context<BufferStore>,
364 ) -> Task<Result<()>> {
365 let buffer = buffer_handle.read(cx);
366
367 let text = buffer.as_rope().clone();
368 let line_ending = buffer.line_ending();
369 let version = buffer.version();
370 let buffer_id = buffer.remote_id();
371 if buffer
372 .file()
373 .is_some_and(|file| file.disk_state() == DiskState::New)
374 {
375 has_changed_file = true;
376 }
377
378 let save = worktree.update(cx, |worktree, cx| {
379 worktree.write_file(path.as_ref(), text, line_ending, cx)
380 });
381
382 cx.spawn(async move |this, cx| {
383 let new_file = save.await?;
384 let mtime = new_file.disk_state().mtime();
385 this.update(cx, |this, cx| {
386 if let Some((downstream_client, project_id)) = this.downstream_client.clone() {
387 if has_changed_file {
388 downstream_client
389 .send(proto::UpdateBufferFile {
390 project_id,
391 buffer_id: buffer_id.to_proto(),
392 file: Some(language::File::to_proto(&*new_file, cx)),
393 })
394 .log_err();
395 }
396 downstream_client
397 .send(proto::BufferSaved {
398 project_id,
399 buffer_id: buffer_id.to_proto(),
400 version: serialize_version(&version),
401 mtime: mtime.map(|time| time.into()),
402 })
403 .log_err();
404 }
405 })?;
406 buffer_handle.update(cx, |buffer, cx| {
407 if has_changed_file {
408 buffer.file_updated(new_file, cx);
409 }
410 buffer.did_save(version.clone(), mtime, cx);
411 })
412 })
413 }
414
415 fn subscribe_to_worktree(
416 &mut self,
417 worktree: &Entity<Worktree>,
418 cx: &mut Context<BufferStore>,
419 ) {
420 cx.subscribe(worktree, |this, worktree, event, cx| {
421 if worktree.read(cx).is_local() {
422 match event {
423 worktree::Event::UpdatedEntries(changes) => {
424 Self::local_worktree_entries_changed(this, &worktree, changes, cx);
425 }
426 _ => {}
427 }
428 }
429 })
430 .detach();
431 }
432
433 fn local_worktree_entries_changed(
434 this: &mut BufferStore,
435 worktree_handle: &Entity<Worktree>,
436 changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
437 cx: &mut Context<BufferStore>,
438 ) {
439 let snapshot = worktree_handle.read(cx).snapshot();
440 for (path, entry_id, _) in changes {
441 Self::local_worktree_entry_changed(
442 this,
443 *entry_id,
444 path,
445 worktree_handle,
446 &snapshot,
447 cx,
448 );
449 }
450 }
451
452 fn local_worktree_entry_changed(
453 this: &mut BufferStore,
454 entry_id: ProjectEntryId,
455 path: &Arc<Path>,
456 worktree: &Entity<worktree::Worktree>,
457 snapshot: &worktree::Snapshot,
458 cx: &mut Context<BufferStore>,
459 ) -> Option<()> {
460 let project_path = ProjectPath {
461 worktree_id: snapshot.id(),
462 path: path.clone(),
463 };
464
465 let buffer_id = {
466 let local = this.as_local_mut()?;
467 match local.local_buffer_ids_by_entry_id.get(&entry_id) {
468 Some(&buffer_id) => buffer_id,
469 None => local.local_buffer_ids_by_path.get(&project_path).copied()?,
470 }
471 };
472
473 let buffer = if let Some(buffer) = this.get(buffer_id) {
474 Some(buffer)
475 } else {
476 this.opened_buffers.remove(&buffer_id);
477 None
478 };
479
480 let buffer = if let Some(buffer) = buffer {
481 buffer
482 } else {
483 let this = this.as_local_mut()?;
484 this.local_buffer_ids_by_path.remove(&project_path);
485 this.local_buffer_ids_by_entry_id.remove(&entry_id);
486 return None;
487 };
488
489 let events = buffer.update(cx, |buffer, cx| {
490 let local = this.as_local_mut()?;
491 let file = buffer.file()?;
492 let old_file = File::from_dyn(Some(file))?;
493 if old_file.worktree != *worktree {
494 return None;
495 }
496
497 let snapshot_entry = old_file
498 .entry_id
499 .and_then(|entry_id| snapshot.entry_for_id(entry_id))
500 .or_else(|| snapshot.entry_for_path(old_file.path.as_ref()));
501
502 let new_file = if let Some(entry) = snapshot_entry {
503 File {
504 disk_state: match entry.mtime {
505 Some(mtime) => DiskState::Present { mtime },
506 None => old_file.disk_state,
507 },
508 is_local: true,
509 entry_id: Some(entry.id),
510 path: entry.path.clone(),
511 worktree: worktree.clone(),
512 is_private: entry.is_private,
513 }
514 } else {
515 File {
516 disk_state: DiskState::Deleted,
517 is_local: true,
518 entry_id: old_file.entry_id,
519 path: old_file.path.clone(),
520 worktree: worktree.clone(),
521 is_private: old_file.is_private,
522 }
523 };
524
525 if new_file == *old_file {
526 return None;
527 }
528
529 let mut events = Vec::new();
530 if new_file.path != old_file.path {
531 local.local_buffer_ids_by_path.remove(&ProjectPath {
532 path: old_file.path.clone(),
533 worktree_id: old_file.worktree_id(cx),
534 });
535 local.local_buffer_ids_by_path.insert(
536 ProjectPath {
537 worktree_id: new_file.worktree_id(cx),
538 path: new_file.path.clone(),
539 },
540 buffer_id,
541 );
542 events.push(BufferStoreEvent::BufferChangedFilePath {
543 buffer: cx.entity(),
544 old_file: buffer.file().cloned(),
545 });
546 }
547
548 if new_file.entry_id != old_file.entry_id {
549 if let Some(entry_id) = old_file.entry_id {
550 local.local_buffer_ids_by_entry_id.remove(&entry_id);
551 }
552 if let Some(entry_id) = new_file.entry_id {
553 local
554 .local_buffer_ids_by_entry_id
555 .insert(entry_id, buffer_id);
556 }
557 }
558
559 if let Some((client, project_id)) = &this.downstream_client {
560 client
561 .send(proto::UpdateBufferFile {
562 project_id: *project_id,
563 buffer_id: buffer_id.to_proto(),
564 file: Some(new_file.to_proto(cx)),
565 })
566 .ok();
567 }
568
569 buffer.file_updated(Arc::new(new_file), cx);
570 Some(events)
571 })?;
572
573 for event in events {
574 cx.emit(event);
575 }
576
577 None
578 }
579
580 fn buffer_changed_file(&mut self, buffer: Entity<Buffer>, cx: &mut App) -> Option<()> {
581 let file = File::from_dyn(buffer.read(cx).file())?;
582
583 let remote_id = buffer.read(cx).remote_id();
584 if let Some(entry_id) = file.entry_id {
585 match self.local_buffer_ids_by_entry_id.get(&entry_id) {
586 Some(_) => {
587 return None;
588 }
589 None => {
590 self.local_buffer_ids_by_entry_id
591 .insert(entry_id, remote_id);
592 }
593 }
594 };
595 self.local_buffer_ids_by_path.insert(
596 ProjectPath {
597 worktree_id: file.worktree_id(cx),
598 path: file.path.clone(),
599 },
600 remote_id,
601 );
602
603 Some(())
604 }
605
606 fn save_buffer(
607 &self,
608 buffer: Entity<Buffer>,
609 cx: &mut Context<BufferStore>,
610 ) -> Task<Result<()>> {
611 let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
612 return Task::ready(Err(anyhow!("buffer doesn't have a file")));
613 };
614 let worktree = file.worktree.clone();
615 self.save_local_buffer(buffer, worktree, file.path.clone(), false, cx)
616 }
617
618 fn save_buffer_as(
619 &self,
620 buffer: Entity<Buffer>,
621 path: ProjectPath,
622 cx: &mut Context<BufferStore>,
623 ) -> Task<Result<()>> {
624 let Some(worktree) = self
625 .worktree_store
626 .read(cx)
627 .worktree_for_id(path.worktree_id, cx)
628 else {
629 return Task::ready(Err(anyhow!("no such worktree")));
630 };
631 self.save_local_buffer(buffer, worktree, path.path.clone(), true, cx)
632 }
633
634 fn open_buffer(
635 &self,
636 path: Arc<Path>,
637 worktree: Entity<Worktree>,
638 cx: &mut Context<BufferStore>,
639 ) -> Task<Result<Entity<Buffer>>> {
640 let load_buffer = worktree.update(cx, |worktree, cx| {
641 let load_file = worktree.load_file(path.as_ref(), cx);
642 let reservation = cx.reserve_entity();
643 let buffer_id = BufferId::from(reservation.entity_id().as_non_zero_u64());
644 cx.spawn(async move |_, cx| {
645 let loaded = load_file.await?;
646 let text_buffer = cx
647 .background_spawn(async move { text::Buffer::new(0, buffer_id, loaded.text) })
648 .await;
649 cx.insert_entity(reservation, |_| {
650 Buffer::build(text_buffer, Some(loaded.file), Capability::ReadWrite)
651 })
652 })
653 });
654
655 cx.spawn(async move |this, cx| {
656 let buffer = match load_buffer.await {
657 Ok(buffer) => Ok(buffer),
658 Err(error) if is_not_found_error(&error) => cx.new(|cx| {
659 let buffer_id = BufferId::from(cx.entity_id().as_non_zero_u64());
660 let text_buffer = text::Buffer::new(0, buffer_id, "".into());
661 Buffer::build(
662 text_buffer,
663 Some(Arc::new(File {
664 worktree,
665 path,
666 disk_state: DiskState::New,
667 entry_id: None,
668 is_local: true,
669 is_private: false,
670 })),
671 Capability::ReadWrite,
672 )
673 }),
674 Err(e) => Err(e),
675 }?;
676 this.update(cx, |this, cx| {
677 this.add_buffer(buffer.clone(), cx)?;
678 let buffer_id = buffer.read(cx).remote_id();
679 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
680 let this = this.as_local_mut().unwrap();
681 this.local_buffer_ids_by_path.insert(
682 ProjectPath {
683 worktree_id: file.worktree_id(cx),
684 path: file.path.clone(),
685 },
686 buffer_id,
687 );
688
689 if let Some(entry_id) = file.entry_id {
690 this.local_buffer_ids_by_entry_id
691 .insert(entry_id, buffer_id);
692 }
693 }
694
695 anyhow::Ok(())
696 })??;
697
698 Ok(buffer)
699 })
700 }
701
702 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
703 cx.spawn(async move |buffer_store, cx| {
704 let buffer =
705 cx.new(|cx| Buffer::local("", cx).with_language(language::PLAIN_TEXT.clone(), cx))?;
706 buffer_store.update(cx, |buffer_store, cx| {
707 buffer_store.add_buffer(buffer.clone(), cx).log_err();
708 })?;
709 Ok(buffer)
710 })
711 }
712
713 fn reload_buffers(
714 &self,
715 buffers: HashSet<Entity<Buffer>>,
716 push_to_history: bool,
717 cx: &mut Context<BufferStore>,
718 ) -> Task<Result<ProjectTransaction>> {
719 cx.spawn(async move |_, cx| {
720 let mut project_transaction = ProjectTransaction::default();
721 for buffer in buffers {
722 let transaction = buffer.update(cx, |buffer, cx| buffer.reload(cx))?.await?;
723 buffer.update(cx, |buffer, cx| {
724 if let Some(transaction) = transaction {
725 if !push_to_history {
726 buffer.forget_transaction(transaction.id);
727 }
728 project_transaction.0.insert(cx.entity(), transaction);
729 }
730 })?;
731 }
732
733 Ok(project_transaction)
734 })
735 }
736}
737
738impl BufferStore {
739 pub fn init(client: &AnyProtoClient) {
740 client.add_entity_message_handler(Self::handle_buffer_reloaded);
741 client.add_entity_message_handler(Self::handle_buffer_saved);
742 client.add_entity_message_handler(Self::handle_update_buffer_file);
743 client.add_entity_request_handler(Self::handle_save_buffer);
744 client.add_entity_request_handler(Self::handle_reload_buffers);
745 }
746
747 /// Creates a buffer store, optionally retaining its buffers.
748 pub fn local(worktree_store: Entity<WorktreeStore>, cx: &mut Context<Self>) -> Self {
749 Self {
750 state: BufferStoreState::Local(LocalBufferStore {
751 local_buffer_ids_by_path: Default::default(),
752 local_buffer_ids_by_entry_id: Default::default(),
753 worktree_store: worktree_store.clone(),
754 _subscription: cx.subscribe(&worktree_store, |this, _, event, cx| {
755 if let WorktreeStoreEvent::WorktreeAdded(worktree) = event {
756 let this = this.as_local_mut().unwrap();
757 this.subscribe_to_worktree(worktree, cx);
758 }
759 }),
760 }),
761 downstream_client: None,
762 opened_buffers: Default::default(),
763 shared_buffers: Default::default(),
764 loading_buffers: Default::default(),
765 worktree_store,
766 }
767 }
768
769 pub fn remote(
770 worktree_store: Entity<WorktreeStore>,
771 upstream_client: AnyProtoClient,
772 remote_id: u64,
773 _cx: &mut Context<Self>,
774 ) -> Self {
775 Self {
776 state: BufferStoreState::Remote(RemoteBufferStore {
777 shared_with_me: Default::default(),
778 loading_remote_buffers_by_id: Default::default(),
779 remote_buffer_listeners: Default::default(),
780 project_id: remote_id,
781 upstream_client,
782 worktree_store: worktree_store.clone(),
783 }),
784 downstream_client: None,
785 opened_buffers: Default::default(),
786 loading_buffers: Default::default(),
787 shared_buffers: Default::default(),
788 worktree_store,
789 }
790 }
791
792 fn as_local(&self) -> Option<&LocalBufferStore> {
793 match &self.state {
794 BufferStoreState::Local(state) => Some(state),
795 _ => None,
796 }
797 }
798
799 fn as_local_mut(&mut self) -> Option<&mut LocalBufferStore> {
800 match &mut self.state {
801 BufferStoreState::Local(state) => Some(state),
802 _ => None,
803 }
804 }
805
806 fn as_remote_mut(&mut self) -> Option<&mut RemoteBufferStore> {
807 match &mut self.state {
808 BufferStoreState::Remote(state) => Some(state),
809 _ => None,
810 }
811 }
812
813 fn as_remote(&self) -> Option<&RemoteBufferStore> {
814 match &self.state {
815 BufferStoreState::Remote(state) => Some(state),
816 _ => None,
817 }
818 }
819
820 pub fn open_buffer(
821 &mut self,
822 project_path: ProjectPath,
823 cx: &mut Context<Self>,
824 ) -> Task<Result<Entity<Buffer>>> {
825 if let Some(buffer) = self.get_by_path(&project_path, cx) {
826 cx.emit(BufferStoreEvent::BufferOpened {
827 buffer: buffer.clone(),
828 project_path,
829 });
830
831 return Task::ready(Ok(buffer));
832 }
833
834 let task = match self.loading_buffers.entry(project_path.clone()) {
835 hash_map::Entry::Occupied(e) => e.get().clone(),
836 hash_map::Entry::Vacant(entry) => {
837 let path = project_path.path.clone();
838 let Some(worktree) = self
839 .worktree_store
840 .read(cx)
841 .worktree_for_id(project_path.worktree_id, cx)
842 else {
843 return Task::ready(Err(anyhow!("no such worktree")));
844 };
845 let load_buffer = match &self.state {
846 BufferStoreState::Local(this) => this.open_buffer(path, worktree, cx),
847 BufferStoreState::Remote(this) => this.open_buffer(path, worktree, cx),
848 };
849
850 entry
851 .insert(
852 cx.spawn(async move |this, cx| {
853 let load_result = load_buffer.await;
854 this.update(cx, |this, cx| {
855 // Record the fact that the buffer is no longer loading.
856 this.loading_buffers.remove(&project_path);
857
858 let buffer = load_result.map_err(Arc::new)?;
859 cx.emit(BufferStoreEvent::BufferOpened {
860 buffer: buffer.clone(),
861 project_path,
862 });
863
864 Ok(buffer)
865 })?
866 })
867 .shared(),
868 )
869 .clone()
870 }
871 };
872
873 cx.background_spawn(async move { task.await.map_err(|e| anyhow!("{e}")) })
874 }
875
876 pub fn create_buffer(&mut self, cx: &mut Context<Self>) -> Task<Result<Entity<Buffer>>> {
877 match &self.state {
878 BufferStoreState::Local(this) => this.create_buffer(cx),
879 BufferStoreState::Remote(this) => this.create_buffer(cx),
880 }
881 }
882
883 pub fn save_buffer(
884 &mut self,
885 buffer: Entity<Buffer>,
886 cx: &mut Context<Self>,
887 ) -> Task<Result<()>> {
888 match &mut self.state {
889 BufferStoreState::Local(this) => this.save_buffer(buffer, cx),
890 BufferStoreState::Remote(this) => this.save_remote_buffer(buffer.clone(), None, cx),
891 }
892 }
893
894 pub fn save_buffer_as(
895 &mut self,
896 buffer: Entity<Buffer>,
897 path: ProjectPath,
898 cx: &mut Context<Self>,
899 ) -> Task<Result<()>> {
900 let old_file = buffer.read(cx).file().cloned();
901 let task = match &self.state {
902 BufferStoreState::Local(this) => this.save_buffer_as(buffer.clone(), path, cx),
903 BufferStoreState::Remote(this) => {
904 this.save_remote_buffer(buffer.clone(), Some(path.to_proto()), cx)
905 }
906 };
907 cx.spawn(async move |this, cx| {
908 task.await?;
909 this.update(cx, |_, cx| {
910 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
911 })
912 })
913 }
914
915 fn add_buffer(&mut self, buffer_entity: Entity<Buffer>, cx: &mut Context<Self>) -> Result<()> {
916 let buffer = buffer_entity.read(cx);
917 let remote_id = buffer.remote_id();
918 let is_remote = buffer.replica_id() != 0;
919 let open_buffer = OpenBuffer::Complete {
920 buffer: buffer_entity.downgrade(),
921 };
922
923 let handle = cx.entity().downgrade();
924 buffer_entity.update(cx, move |_, cx| {
925 cx.on_release(move |buffer, cx| {
926 handle
927 .update(cx, |_, cx| {
928 cx.emit(BufferStoreEvent::BufferDropped(buffer.remote_id()))
929 })
930 .ok();
931 })
932 .detach()
933 });
934
935 match self.opened_buffers.entry(remote_id) {
936 hash_map::Entry::Vacant(entry) => {
937 entry.insert(open_buffer);
938 }
939 hash_map::Entry::Occupied(mut entry) => {
940 if let OpenBuffer::Operations(operations) = entry.get_mut() {
941 buffer_entity.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx));
942 } else if entry.get().upgrade().is_some() {
943 if is_remote {
944 return Ok(());
945 } else {
946 debug_panic!("buffer {} was already registered", remote_id);
947 Err(anyhow!("buffer {} was already registered", remote_id))?;
948 }
949 }
950 entry.insert(open_buffer);
951 }
952 }
953
954 cx.subscribe(&buffer_entity, Self::on_buffer_event).detach();
955 cx.emit(BufferStoreEvent::BufferAdded(buffer_entity));
956 Ok(())
957 }
958
959 pub fn buffers(&self) -> impl '_ + Iterator<Item = Entity<Buffer>> {
960 self.opened_buffers
961 .values()
962 .filter_map(|buffer| buffer.upgrade())
963 }
964
965 pub fn loading_buffers(
966 &self,
967 ) -> impl Iterator<Item = (&ProjectPath, impl Future<Output = Result<Entity<Buffer>>>)> {
968 self.loading_buffers.iter().map(|(path, task)| {
969 let task = task.clone();
970 (path, async move { task.await.map_err(|e| anyhow!("{e}")) })
971 })
972 }
973
974 pub fn buffer_id_for_project_path(&self, project_path: &ProjectPath) -> Option<&BufferId> {
975 self.as_local()
976 .and_then(|state| state.local_buffer_ids_by_path.get(project_path))
977 }
978
979 pub fn get_by_path(&self, path: &ProjectPath, cx: &App) -> Option<Entity<Buffer>> {
980 self.buffers().find_map(|buffer| {
981 let file = File::from_dyn(buffer.read(cx).file())?;
982 if file.worktree_id(cx) == path.worktree_id && file.path == path.path {
983 Some(buffer)
984 } else {
985 None
986 }
987 })
988 }
989
990 pub fn get(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
991 self.opened_buffers.get(&buffer_id)?.upgrade()
992 }
993
994 pub fn get_existing(&self, buffer_id: BufferId) -> Result<Entity<Buffer>> {
995 self.get(buffer_id)
996 .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
997 }
998
999 pub fn get_possibly_incomplete(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
1000 self.get(buffer_id).or_else(|| {
1001 self.as_remote()
1002 .and_then(|remote| remote.loading_remote_buffers_by_id.get(&buffer_id).cloned())
1003 })
1004 }
1005
1006 pub fn buffer_version_info(&self, cx: &App) -> (Vec<proto::BufferVersion>, Vec<BufferId>) {
1007 let buffers = self
1008 .buffers()
1009 .map(|buffer| {
1010 let buffer = buffer.read(cx);
1011 proto::BufferVersion {
1012 id: buffer.remote_id().into(),
1013 version: language::proto::serialize_version(&buffer.version),
1014 }
1015 })
1016 .collect();
1017 let incomplete_buffer_ids = self
1018 .as_remote()
1019 .map(|remote| remote.incomplete_buffer_ids())
1020 .unwrap_or_default();
1021 (buffers, incomplete_buffer_ids)
1022 }
1023
1024 pub fn disconnected_from_host(&mut self, cx: &mut App) {
1025 for open_buffer in self.opened_buffers.values_mut() {
1026 if let Some(buffer) = open_buffer.upgrade() {
1027 buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1028 }
1029 }
1030
1031 for buffer in self.buffers() {
1032 buffer.update(cx, |buffer, cx| {
1033 buffer.set_capability(Capability::ReadOnly, cx)
1034 });
1035 }
1036
1037 if let Some(remote) = self.as_remote_mut() {
1038 // Wake up all futures currently waiting on a buffer to get opened,
1039 // to give them a chance to fail now that we've disconnected.
1040 remote.remote_buffer_listeners.clear()
1041 }
1042 }
1043
1044 pub fn shared(&mut self, remote_id: u64, downstream_client: AnyProtoClient, _cx: &mut App) {
1045 self.downstream_client = Some((downstream_client, remote_id));
1046 }
1047
1048 pub fn unshared(&mut self, _cx: &mut Context<Self>) {
1049 self.downstream_client.take();
1050 self.forget_shared_buffers();
1051 }
1052
1053 pub fn discard_incomplete(&mut self) {
1054 self.opened_buffers
1055 .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
1056 }
1057
1058 pub fn find_search_candidates(
1059 &mut self,
1060 query: &SearchQuery,
1061 mut limit: usize,
1062 fs: Arc<dyn Fs>,
1063 cx: &mut Context<Self>,
1064 ) -> Receiver<Entity<Buffer>> {
1065 let (tx, rx) = smol::channel::unbounded();
1066 let mut open_buffers = HashSet::default();
1067 let mut unnamed_buffers = Vec::new();
1068 for handle in self.buffers() {
1069 let buffer = handle.read(cx);
1070 if let Some(entry_id) = buffer.entry_id(cx) {
1071 open_buffers.insert(entry_id);
1072 } else {
1073 limit = limit.saturating_sub(1);
1074 unnamed_buffers.push(handle)
1075 };
1076 }
1077
1078 const MAX_CONCURRENT_BUFFER_OPENS: usize = 64;
1079 let project_paths_rx = self
1080 .worktree_store
1081 .update(cx, |worktree_store, cx| {
1082 worktree_store.find_search_candidates(query.clone(), limit, open_buffers, fs, cx)
1083 })
1084 .chunks(MAX_CONCURRENT_BUFFER_OPENS);
1085
1086 cx.spawn(async move |this, cx| {
1087 for buffer in unnamed_buffers {
1088 tx.send(buffer).await.ok();
1089 }
1090
1091 let mut project_paths_rx = pin!(project_paths_rx);
1092 while let Some(project_paths) = project_paths_rx.next().await {
1093 let buffers = this.update(cx, |this, cx| {
1094 project_paths
1095 .into_iter()
1096 .map(|project_path| this.open_buffer(project_path, cx))
1097 .collect::<Vec<_>>()
1098 })?;
1099 for buffer_task in buffers {
1100 if let Some(buffer) = buffer_task.await.log_err() {
1101 if tx.send(buffer).await.is_err() {
1102 return anyhow::Ok(());
1103 }
1104 }
1105 }
1106 }
1107 anyhow::Ok(())
1108 })
1109 .detach();
1110 rx
1111 }
1112
1113 fn on_buffer_event(
1114 &mut self,
1115 buffer: Entity<Buffer>,
1116 event: &BufferEvent,
1117 cx: &mut Context<Self>,
1118 ) {
1119 match event {
1120 BufferEvent::FileHandleChanged => {
1121 if let Some(local) = self.as_local_mut() {
1122 local.buffer_changed_file(buffer, cx);
1123 }
1124 }
1125 BufferEvent::Reloaded => {
1126 let Some((downstream_client, project_id)) = self.downstream_client.as_ref() else {
1127 return;
1128 };
1129 let buffer = buffer.read(cx);
1130 downstream_client
1131 .send(proto::BufferReloaded {
1132 project_id: *project_id,
1133 buffer_id: buffer.remote_id().to_proto(),
1134 version: serialize_version(&buffer.version()),
1135 mtime: buffer.saved_mtime().map(|t| t.into()),
1136 line_ending: serialize_line_ending(buffer.line_ending()) as i32,
1137 })
1138 .log_err();
1139 }
1140 BufferEvent::LanguageChanged => {}
1141 _ => {}
1142 }
1143 }
1144
1145 pub async fn handle_update_buffer(
1146 this: Entity<Self>,
1147 envelope: TypedEnvelope<proto::UpdateBuffer>,
1148 mut cx: AsyncApp,
1149 ) -> Result<proto::Ack> {
1150 let payload = envelope.payload.clone();
1151 let buffer_id = BufferId::new(payload.buffer_id)?;
1152 let ops = payload
1153 .operations
1154 .into_iter()
1155 .map(language::proto::deserialize_operation)
1156 .collect::<Result<Vec<_>, _>>()?;
1157 this.update(&mut cx, |this, cx| {
1158 match this.opened_buffers.entry(buffer_id) {
1159 hash_map::Entry::Occupied(mut e) => match e.get_mut() {
1160 OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
1161 OpenBuffer::Complete { buffer, .. } => {
1162 if let Some(buffer) = buffer.upgrade() {
1163 buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx));
1164 }
1165 }
1166 },
1167 hash_map::Entry::Vacant(e) => {
1168 e.insert(OpenBuffer::Operations(ops));
1169 }
1170 }
1171 Ok(proto::Ack {})
1172 })?
1173 }
1174
1175 pub fn register_shared_lsp_handle(
1176 &mut self,
1177 peer_id: proto::PeerId,
1178 buffer_id: BufferId,
1179 handle: OpenLspBufferHandle,
1180 ) {
1181 if let Some(shared_buffers) = self.shared_buffers.get_mut(&peer_id) {
1182 if let Some(buffer) = shared_buffers.get_mut(&buffer_id) {
1183 buffer.lsp_handle = Some(handle);
1184 return;
1185 }
1186 }
1187 debug_panic!("tried to register shared lsp handle, but buffer was not shared")
1188 }
1189
1190 pub fn handle_synchronize_buffers(
1191 &mut self,
1192 envelope: TypedEnvelope<proto::SynchronizeBuffers>,
1193 cx: &mut Context<Self>,
1194 client: Arc<Client>,
1195 ) -> Result<proto::SynchronizeBuffersResponse> {
1196 let project_id = envelope.payload.project_id;
1197 let mut response = proto::SynchronizeBuffersResponse {
1198 buffers: Default::default(),
1199 };
1200 let Some(guest_id) = envelope.original_sender_id else {
1201 anyhow::bail!("missing original_sender_id on SynchronizeBuffers request");
1202 };
1203
1204 self.shared_buffers.entry(guest_id).or_default().clear();
1205 for buffer in envelope.payload.buffers {
1206 let buffer_id = BufferId::new(buffer.id)?;
1207 let remote_version = language::proto::deserialize_version(&buffer.version);
1208 if let Some(buffer) = self.get(buffer_id) {
1209 self.shared_buffers
1210 .entry(guest_id)
1211 .or_default()
1212 .entry(buffer_id)
1213 .or_insert_with(|| SharedBuffer {
1214 buffer: buffer.clone(),
1215 lsp_handle: None,
1216 });
1217
1218 let buffer = buffer.read(cx);
1219 response.buffers.push(proto::BufferVersion {
1220 id: buffer_id.into(),
1221 version: language::proto::serialize_version(&buffer.version),
1222 });
1223
1224 let operations = buffer.serialize_ops(Some(remote_version), cx);
1225 let client = client.clone();
1226 if let Some(file) = buffer.file() {
1227 client
1228 .send(proto::UpdateBufferFile {
1229 project_id,
1230 buffer_id: buffer_id.into(),
1231 file: Some(file.to_proto(cx)),
1232 })
1233 .log_err();
1234 }
1235
1236 // TODO(max): do something
1237 // client
1238 // .send(proto::UpdateStagedText {
1239 // project_id,
1240 // buffer_id: buffer_id.into(),
1241 // diff_base: buffer.diff_base().map(ToString::to_string),
1242 // })
1243 // .log_err();
1244
1245 client
1246 .send(proto::BufferReloaded {
1247 project_id,
1248 buffer_id: buffer_id.into(),
1249 version: language::proto::serialize_version(buffer.saved_version()),
1250 mtime: buffer.saved_mtime().map(|time| time.into()),
1251 line_ending: language::proto::serialize_line_ending(buffer.line_ending())
1252 as i32,
1253 })
1254 .log_err();
1255
1256 cx.background_spawn(
1257 async move {
1258 let operations = operations.await;
1259 for chunk in split_operations(operations) {
1260 client
1261 .request(proto::UpdateBuffer {
1262 project_id,
1263 buffer_id: buffer_id.into(),
1264 operations: chunk,
1265 })
1266 .await?;
1267 }
1268 anyhow::Ok(())
1269 }
1270 .log_err(),
1271 )
1272 .detach();
1273 }
1274 }
1275 Ok(response)
1276 }
1277
1278 pub fn handle_create_buffer_for_peer(
1279 &mut self,
1280 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
1281 replica_id: u16,
1282 capability: Capability,
1283 cx: &mut Context<Self>,
1284 ) -> Result<()> {
1285 let Some(remote) = self.as_remote_mut() else {
1286 return Err(anyhow!("buffer store is not a remote"));
1287 };
1288
1289 if let Some(buffer) =
1290 remote.handle_create_buffer_for_peer(envelope, replica_id, capability, cx)?
1291 {
1292 self.add_buffer(buffer, cx)?;
1293 }
1294
1295 Ok(())
1296 }
1297
1298 pub async fn handle_update_buffer_file(
1299 this: Entity<Self>,
1300 envelope: TypedEnvelope<proto::UpdateBufferFile>,
1301 mut cx: AsyncApp,
1302 ) -> Result<()> {
1303 let buffer_id = envelope.payload.buffer_id;
1304 let buffer_id = BufferId::new(buffer_id)?;
1305
1306 this.update(&mut cx, |this, cx| {
1307 let payload = envelope.payload.clone();
1308 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1309 let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
1310 let worktree = this
1311 .worktree_store
1312 .read(cx)
1313 .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
1314 .ok_or_else(|| anyhow!("no such worktree"))?;
1315 let file = File::from_proto(file, worktree, cx)?;
1316 let old_file = buffer.update(cx, |buffer, cx| {
1317 let old_file = buffer.file().cloned();
1318 let new_path = file.path.clone();
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.update(&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.update(&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.update(&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 .ok_or_else(|| anyhow!("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 Ok::<_, anyhow::Error>(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.update(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 let this = self
1610 .as_local_mut()
1611 .expect("local-only method called in a non-local context");
1612 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1613 this.local_buffer_ids_by_path.insert(
1614 ProjectPath {
1615 worktree_id: file.worktree_id(cx),
1616 path: file.path.clone(),
1617 },
1618 buffer_id,
1619 );
1620
1621 if let Some(entry_id) = file.entry_id {
1622 this.local_buffer_ids_by_entry_id
1623 .insert(entry_id, buffer_id);
1624 }
1625 }
1626 buffer
1627 }
1628
1629 pub fn deserialize_project_transaction(
1630 &mut self,
1631 message: proto::ProjectTransaction,
1632 push_to_history: bool,
1633 cx: &mut Context<Self>,
1634 ) -> Task<Result<ProjectTransaction>> {
1635 if let Some(this) = self.as_remote_mut() {
1636 this.deserialize_project_transaction(message, push_to_history, cx)
1637 } else {
1638 debug_panic!("not a remote buffer store");
1639 Task::ready(Err(anyhow!("not a remote buffer store")))
1640 }
1641 }
1642
1643 pub fn wait_for_remote_buffer(
1644 &mut self,
1645 id: BufferId,
1646 cx: &mut Context<BufferStore>,
1647 ) -> Task<Result<Entity<Buffer>>> {
1648 if let Some(this) = self.as_remote_mut() {
1649 this.wait_for_remote_buffer(id, cx)
1650 } else {
1651 debug_panic!("not a remote buffer store");
1652 Task::ready(Err(anyhow!("not a remote buffer store")))
1653 }
1654 }
1655
1656 pub fn serialize_project_transaction_for_peer(
1657 &mut self,
1658 project_transaction: ProjectTransaction,
1659 peer_id: proto::PeerId,
1660 cx: &mut Context<Self>,
1661 ) -> proto::ProjectTransaction {
1662 let mut serialized_transaction = proto::ProjectTransaction {
1663 buffer_ids: Default::default(),
1664 transactions: Default::default(),
1665 };
1666 for (buffer, transaction) in project_transaction.0 {
1667 self.create_buffer_for_peer(&buffer, peer_id, cx)
1668 .detach_and_log_err(cx);
1669 serialized_transaction
1670 .buffer_ids
1671 .push(buffer.read(cx).remote_id().into());
1672 serialized_transaction
1673 .transactions
1674 .push(language::proto::serialize_transaction(&transaction));
1675 }
1676 serialized_transaction
1677 }
1678}
1679
1680impl OpenBuffer {
1681 fn upgrade(&self) -> Option<Entity<Buffer>> {
1682 match self {
1683 OpenBuffer::Complete { buffer, .. } => buffer.upgrade(),
1684 OpenBuffer::Operations(_) => None,
1685 }
1686 }
1687}
1688
1689fn is_not_found_error(error: &anyhow::Error) -> bool {
1690 error
1691 .root_cause()
1692 .downcast_ref::<io::Error>()
1693 .is_some_and(|err| err.kind() == io::ErrorKind::NotFound)
1694}