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, ErrorCode, 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, Clone)]
92pub struct ProjectTransaction(pub HashMap<Entity<Buffer>, language::Transaction>);
93
94impl PartialEq for ProjectTransaction {
95 fn eq(&self, other: &Self) -> bool {
96 self.0.len() == other.0.len()
97 && self.0.iter().all(|(buffer, transaction)| {
98 other.0.get(buffer).is_some_and(|t| t.id == transaction.id)
99 })
100 }
101}
102
103impl EventEmitter<BufferStoreEvent> for BufferStore {}
104
105impl RemoteBufferStore {
106 pub fn wait_for_remote_buffer(
107 &mut self,
108 id: BufferId,
109 cx: &mut Context<BufferStore>,
110 ) -> Task<Result<Entity<Buffer>>> {
111 let (tx, rx) = oneshot::channel();
112 self.remote_buffer_listeners.entry(id).or_default().push(tx);
113
114 cx.spawn(async move |this, cx| {
115 if let Some(buffer) = this
116 .read_with(cx, |buffer_store, _| buffer_store.get(id))
117 .ok()
118 .flatten()
119 {
120 return Ok(buffer);
121 }
122
123 cx.background_spawn(async move { rx.await? }).await
124 })
125 }
126
127 fn save_remote_buffer(
128 &self,
129 buffer_handle: Entity<Buffer>,
130 new_path: Option<proto::ProjectPath>,
131 cx: &Context<BufferStore>,
132 ) -> Task<Result<()>> {
133 let buffer = buffer_handle.read(cx);
134 let buffer_id = buffer.remote_id().into();
135 let version = buffer.version();
136 let rpc = self.upstream_client.clone();
137 let project_id = self.project_id;
138 cx.spawn(async move |_, cx| {
139 let response = rpc
140 .request(proto::SaveBuffer {
141 project_id,
142 buffer_id,
143 new_path,
144 version: serialize_version(&version),
145 })
146 .await?;
147 let version = deserialize_version(&response.version);
148 let mtime = response.mtime.map(|mtime| mtime.into());
149
150 buffer_handle.update(cx, |buffer, cx| {
151 buffer.did_save(version.clone(), mtime, cx);
152 })?;
153
154 Ok(())
155 })
156 }
157
158 pub fn handle_create_buffer_for_peer(
159 &mut self,
160 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
161 replica_id: u16,
162 capability: Capability,
163 cx: &mut Context<BufferStore>,
164 ) -> Result<Option<Entity<Buffer>>> {
165 match envelope.payload.variant.context("missing variant")? {
166 proto::create_buffer_for_peer::Variant::State(mut state) => {
167 let buffer_id = BufferId::new(state.id)?;
168
169 let buffer_result = maybe!({
170 let mut buffer_file = None;
171 if let Some(file) = state.file.take() {
172 let worktree_id = worktree::WorktreeId::from_proto(file.worktree_id);
173 let worktree = self
174 .worktree_store
175 .read(cx)
176 .worktree_for_id(worktree_id, cx)
177 .with_context(|| {
178 format!("no worktree found for id {}", file.worktree_id)
179 })?;
180 buffer_file = Some(Arc::new(File::from_proto(file, worktree, cx)?)
181 as Arc<dyn language::File>);
182 }
183 Buffer::from_proto(replica_id, capability, state, buffer_file)
184 });
185
186 match buffer_result {
187 Ok(buffer) => {
188 let buffer = cx.new(|_| buffer);
189 self.loading_remote_buffers_by_id.insert(buffer_id, buffer);
190 }
191 Err(error) => {
192 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
193 for listener in listeners {
194 listener.send(Err(anyhow!(error.cloned()))).ok();
195 }
196 }
197 }
198 }
199 }
200 proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
201 let buffer_id = BufferId::new(chunk.buffer_id)?;
202 let buffer = self
203 .loading_remote_buffers_by_id
204 .get(&buffer_id)
205 .cloned()
206 .with_context(|| {
207 format!(
208 "received chunk for buffer {} without initial state",
209 chunk.buffer_id
210 )
211 })?;
212
213 let result = maybe!({
214 let operations = chunk
215 .operations
216 .into_iter()
217 .map(language::proto::deserialize_operation)
218 .collect::<Result<Vec<_>>>()?;
219 buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx));
220 anyhow::Ok(())
221 });
222
223 if let Err(error) = result {
224 self.loading_remote_buffers_by_id.remove(&buffer_id);
225 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
226 for listener in listeners {
227 listener.send(Err(error.cloned())).ok();
228 }
229 }
230 } else if chunk.is_last {
231 self.loading_remote_buffers_by_id.remove(&buffer_id);
232 if self.upstream_client.is_via_collab() {
233 // retain buffers sent by peers to avoid races.
234 self.shared_with_me.insert(buffer.clone());
235 }
236
237 if let Some(senders) = self.remote_buffer_listeners.remove(&buffer_id) {
238 for sender in senders {
239 sender.send(Ok(buffer.clone())).ok();
240 }
241 }
242 return Ok(Some(buffer));
243 }
244 }
245 }
246 Ok(None)
247 }
248
249 pub fn incomplete_buffer_ids(&self) -> Vec<BufferId> {
250 self.loading_remote_buffers_by_id
251 .keys()
252 .copied()
253 .collect::<Vec<_>>()
254 }
255
256 pub fn deserialize_project_transaction(
257 &self,
258 message: proto::ProjectTransaction,
259 push_to_history: bool,
260 cx: &mut Context<BufferStore>,
261 ) -> Task<Result<ProjectTransaction>> {
262 cx.spawn(async move |this, cx| {
263 let mut project_transaction = ProjectTransaction::default();
264 for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
265 {
266 let buffer_id = BufferId::new(buffer_id)?;
267 let buffer = this
268 .update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
269 .await?;
270 let transaction = language::proto::deserialize_transaction(transaction)?;
271 project_transaction.0.insert(buffer, transaction);
272 }
273
274 for (buffer, transaction) in &project_transaction.0 {
275 buffer
276 .update(cx, |buffer, _| {
277 buffer.wait_for_edits(transaction.edit_ids.iter().copied())
278 })?
279 .await?;
280
281 if push_to_history {
282 buffer.update(cx, |buffer, _| {
283 buffer.push_transaction(transaction.clone(), Instant::now());
284 buffer.finalize_last_transaction();
285 })?;
286 }
287 }
288
289 Ok(project_transaction)
290 })
291 }
292
293 fn open_buffer(
294 &self,
295 path: Arc<Path>,
296 worktree: Entity<Worktree>,
297 cx: &mut Context<BufferStore>,
298 ) -> Task<Result<Entity<Buffer>>> {
299 let worktree_id = worktree.read(cx).id().to_proto();
300 let project_id = self.project_id;
301 let client = self.upstream_client.clone();
302 cx.spawn(async move |this, cx| {
303 let response = client
304 .request(proto::OpenBufferByPath {
305 project_id,
306 worktree_id,
307 path: path.to_proto(),
308 })
309 .await?;
310 let buffer_id = BufferId::new(response.buffer_id)?;
311
312 let buffer = this
313 .update(cx, {
314 |this, cx| this.wait_for_remote_buffer(buffer_id, cx)
315 })?
316 .await?;
317
318 Ok(buffer)
319 })
320 }
321
322 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
323 let create = self.upstream_client.request(proto::OpenNewBuffer {
324 project_id: self.project_id,
325 });
326 cx.spawn(async move |this, cx| {
327 let response = create.await?;
328 let buffer_id = BufferId::new(response.buffer_id)?;
329
330 this.update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
331 .await
332 })
333 }
334
335 fn reload_buffers(
336 &self,
337 buffers: HashSet<Entity<Buffer>>,
338 push_to_history: bool,
339 cx: &mut Context<BufferStore>,
340 ) -> Task<Result<ProjectTransaction>> {
341 let request = self.upstream_client.request(proto::ReloadBuffers {
342 project_id: self.project_id,
343 buffer_ids: buffers
344 .iter()
345 .map(|buffer| buffer.read(cx).remote_id().to_proto())
346 .collect(),
347 });
348
349 cx.spawn(async move |this, cx| {
350 let response = request.await?.transaction.context("missing transaction")?;
351 this.update(cx, |this, cx| {
352 this.deserialize_project_transaction(response, push_to_history, cx)
353 })?
354 .await
355 })
356 }
357}
358
359impl LocalBufferStore {
360 fn save_local_buffer(
361 &self,
362 buffer_handle: Entity<Buffer>,
363 worktree: Entity<Worktree>,
364 path: Arc<Path>,
365 mut has_changed_file: bool,
366 cx: &mut Context<BufferStore>,
367 ) -> Task<Result<()>> {
368 let buffer = buffer_handle.read(cx);
369
370 let text = buffer.as_rope().clone();
371 let line_ending = buffer.line_ending();
372 let version = buffer.version();
373 let buffer_id = buffer.remote_id();
374 let file = buffer.file().cloned();
375 if file
376 .as_ref()
377 .is_some_and(|file| file.disk_state() == DiskState::New)
378 {
379 has_changed_file = true;
380 }
381
382 let save = worktree.update(cx, |worktree, cx| {
383 worktree.write_file(path.as_ref(), text, line_ending, cx)
384 });
385
386 cx.spawn(async move |this, cx| {
387 let new_file = save.await?;
388 let mtime = new_file.disk_state().mtime();
389 this.update(cx, |this, cx| {
390 if let Some((downstream_client, project_id)) = this.downstream_client.clone() {
391 if has_changed_file {
392 downstream_client
393 .send(proto::UpdateBufferFile {
394 project_id,
395 buffer_id: buffer_id.to_proto(),
396 file: Some(language::File::to_proto(&*new_file, cx)),
397 })
398 .log_err();
399 }
400 downstream_client
401 .send(proto::BufferSaved {
402 project_id,
403 buffer_id: buffer_id.to_proto(),
404 version: serialize_version(&version),
405 mtime: mtime.map(|time| time.into()),
406 })
407 .log_err();
408 }
409 })?;
410 buffer_handle.update(cx, |buffer, cx| {
411 if has_changed_file {
412 buffer.file_updated(new_file, cx);
413 }
414 buffer.did_save(version.clone(), mtime, cx);
415 })
416 })
417 }
418
419 fn subscribe_to_worktree(
420 &mut self,
421 worktree: &Entity<Worktree>,
422 cx: &mut Context<BufferStore>,
423 ) {
424 cx.subscribe(worktree, |this, worktree, event, cx| {
425 if worktree.read(cx).is_local()
426 && let worktree::Event::UpdatedEntries(changes) = event
427 {
428 Self::local_worktree_entries_changed(this, &worktree, changes, cx);
429 }
430 })
431 .detach();
432 }
433
434 fn local_worktree_entries_changed(
435 this: &mut BufferStore,
436 worktree_handle: &Entity<Worktree>,
437 changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
438 cx: &mut Context<BufferStore>,
439 ) {
440 let snapshot = worktree_handle.read(cx).snapshot();
441 for (path, entry_id, _) in changes {
442 Self::local_worktree_entry_changed(
443 this,
444 *entry_id,
445 path,
446 worktree_handle,
447 &snapshot,
448 cx,
449 );
450 }
451 }
452
453 fn local_worktree_entry_changed(
454 this: &mut BufferStore,
455 entry_id: ProjectEntryId,
456 path: &Arc<Path>,
457 worktree: &Entity<worktree::Worktree>,
458 snapshot: &worktree::Snapshot,
459 cx: &mut Context<BufferStore>,
460 ) -> Option<()> {
461 let project_path = ProjectPath {
462 worktree_id: snapshot.id(),
463 path: path.clone(),
464 };
465
466 let buffer_id = this
467 .as_local_mut()
468 .and_then(|local| local.local_buffer_ids_by_entry_id.get(&entry_id))
469 .copied()
470 .or_else(|| this.path_to_buffer_id.get(&project_path).copied())?;
471
472 let buffer = if let Some(buffer) = this.get(buffer_id) {
473 Some(buffer)
474 } else {
475 this.opened_buffers.remove(&buffer_id);
476 None
477 };
478
479 let buffer = if let Some(buffer) = buffer {
480 buffer
481 } else {
482 this.path_to_buffer_id.remove(&project_path);
483 let this = this.as_local_mut()?;
484 this.local_buffer_ids_by_entry_id.remove(&entry_id);
485 return None;
486 };
487
488 let events = buffer.update(cx, |buffer, cx| {
489 let file = buffer.file()?;
490 let old_file = File::from_dyn(Some(file))?;
491 if old_file.worktree != *worktree {
492 return None;
493 }
494
495 let snapshot_entry = old_file
496 .entry_id
497 .and_then(|entry_id| snapshot.entry_for_id(entry_id))
498 .or_else(|| snapshot.entry_for_path(old_file.path.as_ref()));
499
500 let new_file = if let Some(entry) = snapshot_entry {
501 File {
502 disk_state: match entry.mtime {
503 Some(mtime) => DiskState::Present { mtime },
504 None => old_file.disk_state,
505 },
506 is_local: true,
507 entry_id: Some(entry.id),
508 path: entry.path.clone(),
509 worktree: worktree.clone(),
510 is_private: entry.is_private,
511 }
512 } else {
513 File {
514 disk_state: DiskState::Deleted,
515 is_local: true,
516 entry_id: old_file.entry_id,
517 path: old_file.path.clone(),
518 worktree: worktree.clone(),
519 is_private: old_file.is_private,
520 }
521 };
522
523 if new_file == *old_file {
524 return None;
525 }
526
527 let mut events = Vec::new();
528 if new_file.path != old_file.path {
529 this.path_to_buffer_id.remove(&ProjectPath {
530 path: old_file.path.clone(),
531 worktree_id: old_file.worktree_id(cx),
532 });
533 this.path_to_buffer_id.insert(
534 ProjectPath {
535 worktree_id: new_file.worktree_id(cx),
536 path: new_file.path.clone(),
537 },
538 buffer_id,
539 );
540 events.push(BufferStoreEvent::BufferChangedFilePath {
541 buffer: cx.entity(),
542 old_file: buffer.file().cloned(),
543 });
544 }
545 let local = this.as_local_mut()?;
546 if new_file.entry_id != old_file.entry_id {
547 if let Some(entry_id) = old_file.entry_id {
548 local.local_buffer_ids_by_entry_id.remove(&entry_id);
549 }
550 if let Some(entry_id) = new_file.entry_id {
551 local
552 .local_buffer_ids_by_entry_id
553 .insert(entry_id, buffer_id);
554 }
555 }
556
557 if let Some((client, project_id)) = &this.downstream_client {
558 client
559 .send(proto::UpdateBufferFile {
560 project_id: *project_id,
561 buffer_id: buffer_id.to_proto(),
562 file: Some(new_file.to_proto(cx)),
563 })
564 .ok();
565 }
566
567 buffer.file_updated(Arc::new(new_file), cx);
568 Some(events)
569 })?;
570
571 for event in events {
572 cx.emit(event);
573 }
574
575 None
576 }
577
578 fn save_buffer(
579 &self,
580 buffer: Entity<Buffer>,
581 cx: &mut Context<BufferStore>,
582 ) -> Task<Result<()>> {
583 let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
584 return Task::ready(Err(anyhow!("buffer doesn't have a file")));
585 };
586 let worktree = file.worktree.clone();
587 self.save_local_buffer(buffer, worktree, file.path.clone(), false, cx)
588 }
589
590 fn save_buffer_as(
591 &self,
592 buffer: Entity<Buffer>,
593 path: ProjectPath,
594 cx: &mut Context<BufferStore>,
595 ) -> Task<Result<()>> {
596 let Some(worktree) = self
597 .worktree_store
598 .read(cx)
599 .worktree_for_id(path.worktree_id, cx)
600 else {
601 return Task::ready(Err(anyhow!("no such worktree")));
602 };
603 self.save_local_buffer(buffer, worktree, path.path, true, cx)
604 }
605
606 fn open_buffer(
607 &self,
608 path: Arc<Path>,
609 worktree: Entity<Worktree>,
610 cx: &mut Context<BufferStore>,
611 ) -> Task<Result<Entity<Buffer>>> {
612 let load_buffer = worktree.update(cx, |worktree, cx| {
613 let load_file = worktree.load_file(path.as_ref(), cx);
614 let reservation = cx.reserve_entity();
615 let buffer_id = BufferId::from(reservation.entity_id().as_non_zero_u64());
616 cx.spawn(async move |_, cx| {
617 let loaded = load_file.await?;
618 let text_buffer = cx
619 .background_spawn(async move { text::Buffer::new(0, buffer_id, loaded.text) })
620 .await;
621 cx.insert_entity(reservation, |_| {
622 Buffer::build(text_buffer, Some(loaded.file), Capability::ReadWrite)
623 })
624 })
625 });
626
627 cx.spawn(async move |this, cx| {
628 let buffer = match load_buffer.await {
629 Ok(buffer) => Ok(buffer),
630 Err(error) if is_not_found_error(&error) => cx.new(|cx| {
631 let buffer_id = BufferId::from(cx.entity_id().as_non_zero_u64());
632 let text_buffer = text::Buffer::new(0, buffer_id, "");
633 Buffer::build(
634 text_buffer,
635 Some(Arc::new(File {
636 worktree,
637 path,
638 disk_state: DiskState::New,
639 entry_id: None,
640 is_local: true,
641 is_private: false,
642 })),
643 Capability::ReadWrite,
644 )
645 }),
646 Err(e) => Err(e),
647 }?;
648 this.update(cx, |this, cx| {
649 this.add_buffer(buffer.clone(), cx)?;
650 let buffer_id = buffer.read(cx).remote_id();
651 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
652 this.path_to_buffer_id.insert(
653 ProjectPath {
654 worktree_id: file.worktree_id(cx),
655 path: file.path.clone(),
656 },
657 buffer_id,
658 );
659 let this = this.as_local_mut().unwrap();
660 if let Some(entry_id) = file.entry_id {
661 this.local_buffer_ids_by_entry_id
662 .insert(entry_id, buffer_id);
663 }
664 }
665
666 anyhow::Ok(())
667 })??;
668
669 Ok(buffer)
670 })
671 }
672
673 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
674 cx.spawn(async move |buffer_store, cx| {
675 let buffer =
676 cx.new(|cx| Buffer::local("", cx).with_language(language::PLAIN_TEXT.clone(), cx))?;
677 buffer_store.update(cx, |buffer_store, cx| {
678 buffer_store.add_buffer(buffer.clone(), cx).log_err();
679 })?;
680 Ok(buffer)
681 })
682 }
683
684 fn reload_buffers(
685 &self,
686 buffers: HashSet<Entity<Buffer>>,
687 push_to_history: bool,
688 cx: &mut Context<BufferStore>,
689 ) -> Task<Result<ProjectTransaction>> {
690 cx.spawn(async move |_, cx| {
691 let mut project_transaction = ProjectTransaction::default();
692 for buffer in buffers {
693 let transaction = buffer.update(cx, |buffer, cx| buffer.reload(cx))?.await?;
694 buffer.update(cx, |buffer, cx| {
695 if let Some(transaction) = transaction {
696 if !push_to_history {
697 buffer.forget_transaction(transaction.id);
698 }
699 project_transaction.0.insert(cx.entity(), transaction);
700 }
701 })?;
702 }
703
704 Ok(project_transaction)
705 })
706 }
707}
708
709impl BufferStore {
710 pub fn init(client: &AnyProtoClient) {
711 client.add_entity_message_handler(Self::handle_buffer_reloaded);
712 client.add_entity_message_handler(Self::handle_buffer_saved);
713 client.add_entity_message_handler(Self::handle_update_buffer_file);
714 client.add_entity_request_handler(Self::handle_save_buffer);
715 client.add_entity_request_handler(Self::handle_reload_buffers);
716 }
717
718 /// Creates a buffer store, optionally retaining its buffers.
719 pub fn local(worktree_store: Entity<WorktreeStore>, cx: &mut Context<Self>) -> Self {
720 Self {
721 state: BufferStoreState::Local(LocalBufferStore {
722 local_buffer_ids_by_entry_id: Default::default(),
723 worktree_store: worktree_store.clone(),
724 _subscription: cx.subscribe(&worktree_store, |this, _, event, cx| {
725 if let WorktreeStoreEvent::WorktreeAdded(worktree) = event {
726 let this = this.as_local_mut().unwrap();
727 this.subscribe_to_worktree(worktree, cx);
728 }
729 }),
730 }),
731 downstream_client: None,
732 opened_buffers: Default::default(),
733 path_to_buffer_id: Default::default(),
734 shared_buffers: Default::default(),
735 loading_buffers: Default::default(),
736 non_searchable_buffers: Default::default(),
737 worktree_store,
738 }
739 }
740
741 pub fn remote(
742 worktree_store: Entity<WorktreeStore>,
743 upstream_client: AnyProtoClient,
744 remote_id: u64,
745 _cx: &mut Context<Self>,
746 ) -> Self {
747 Self {
748 state: BufferStoreState::Remote(RemoteBufferStore {
749 shared_with_me: Default::default(),
750 loading_remote_buffers_by_id: Default::default(),
751 remote_buffer_listeners: Default::default(),
752 project_id: remote_id,
753 upstream_client,
754 worktree_store: worktree_store.clone(),
755 }),
756 downstream_client: None,
757 opened_buffers: Default::default(),
758 path_to_buffer_id: Default::default(),
759 loading_buffers: Default::default(),
760 shared_buffers: Default::default(),
761 non_searchable_buffers: Default::default(),
762 worktree_store,
763 }
764 }
765
766 fn as_local_mut(&mut self) -> Option<&mut LocalBufferStore> {
767 match &mut self.state {
768 BufferStoreState::Local(state) => Some(state),
769 _ => None,
770 }
771 }
772
773 fn as_remote_mut(&mut self) -> Option<&mut RemoteBufferStore> {
774 match &mut self.state {
775 BufferStoreState::Remote(state) => Some(state),
776 _ => None,
777 }
778 }
779
780 fn as_remote(&self) -> Option<&RemoteBufferStore> {
781 match &self.state {
782 BufferStoreState::Remote(state) => Some(state),
783 _ => None,
784 }
785 }
786
787 pub fn open_buffer(
788 &mut self,
789 project_path: ProjectPath,
790 cx: &mut Context<Self>,
791 ) -> Task<Result<Entity<Buffer>>> {
792 if let Some(buffer) = self.get_by_path(&project_path) {
793 cx.emit(BufferStoreEvent::BufferOpened {
794 buffer: buffer.clone(),
795 project_path,
796 });
797
798 return Task::ready(Ok(buffer));
799 }
800
801 let task = match self.loading_buffers.entry(project_path.clone()) {
802 hash_map::Entry::Occupied(e) => e.get().clone(),
803 hash_map::Entry::Vacant(entry) => {
804 let path = project_path.path.clone();
805 let Some(worktree) = self
806 .worktree_store
807 .read(cx)
808 .worktree_for_id(project_path.worktree_id, cx)
809 else {
810 return Task::ready(Err(anyhow!("no such worktree")));
811 };
812 let load_buffer = match &self.state {
813 BufferStoreState::Local(this) => this.open_buffer(path, worktree, cx),
814 BufferStoreState::Remote(this) => this.open_buffer(path, worktree, cx),
815 };
816
817 entry
818 .insert(
819 cx.spawn(async move |this, cx| {
820 let load_result = load_buffer.await;
821 this.update(cx, |this, cx| {
822 // Record the fact that the buffer is no longer loading.
823 this.loading_buffers.remove(&project_path);
824
825 let buffer = load_result.map_err(Arc::new)?;
826 cx.emit(BufferStoreEvent::BufferOpened {
827 buffer: buffer.clone(),
828 project_path,
829 });
830
831 Ok(buffer)
832 })?
833 })
834 .shared(),
835 )
836 .clone()
837 }
838 };
839
840 cx.background_spawn(async move {
841 task.await.map_err(|e| {
842 if e.error_code() != ErrorCode::Internal {
843 anyhow!(e.error_code())
844 } else {
845 anyhow!("{e}")
846 }
847 })
848 })
849 }
850
851 pub fn create_buffer(&mut self, cx: &mut Context<Self>) -> Task<Result<Entity<Buffer>>> {
852 match &self.state {
853 BufferStoreState::Local(this) => this.create_buffer(cx),
854 BufferStoreState::Remote(this) => this.create_buffer(cx),
855 }
856 }
857
858 pub fn save_buffer(
859 &mut self,
860 buffer: Entity<Buffer>,
861 cx: &mut Context<Self>,
862 ) -> Task<Result<()>> {
863 match &mut self.state {
864 BufferStoreState::Local(this) => this.save_buffer(buffer, cx),
865 BufferStoreState::Remote(this) => this.save_remote_buffer(buffer, None, cx),
866 }
867 }
868
869 pub fn save_buffer_as(
870 &mut self,
871 buffer: Entity<Buffer>,
872 path: ProjectPath,
873 cx: &mut Context<Self>,
874 ) -> Task<Result<()>> {
875 let old_file = buffer.read(cx).file().cloned();
876 let task = match &self.state {
877 BufferStoreState::Local(this) => this.save_buffer_as(buffer.clone(), path, cx),
878 BufferStoreState::Remote(this) => {
879 this.save_remote_buffer(buffer.clone(), Some(path.to_proto()), cx)
880 }
881 };
882 cx.spawn(async move |this, cx| {
883 task.await?;
884 this.update(cx, |_, cx| {
885 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
886 })
887 })
888 }
889
890 fn add_buffer(&mut self, buffer_entity: Entity<Buffer>, cx: &mut Context<Self>) -> Result<()> {
891 let buffer = buffer_entity.read(cx);
892 let remote_id = buffer.remote_id();
893 let path = File::from_dyn(buffer.file()).map(|file| ProjectPath {
894 path: file.path.clone(),
895 worktree_id: file.worktree_id(cx),
896 });
897 let is_remote = buffer.replica_id() != 0;
898 let open_buffer = OpenBuffer::Complete {
899 buffer: buffer_entity.downgrade(),
900 };
901
902 let handle = cx.entity().downgrade();
903 buffer_entity.update(cx, move |_, cx| {
904 cx.on_release(move |buffer, cx| {
905 handle
906 .update(cx, |_, cx| {
907 cx.emit(BufferStoreEvent::BufferDropped(buffer.remote_id()))
908 })
909 .ok();
910 })
911 .detach()
912 });
913 let _expect_path_to_exist;
914 match self.opened_buffers.entry(remote_id) {
915 hash_map::Entry::Vacant(entry) => {
916 entry.insert(open_buffer);
917 _expect_path_to_exist = false;
918 }
919 hash_map::Entry::Occupied(mut entry) => {
920 if let OpenBuffer::Operations(operations) = entry.get_mut() {
921 buffer_entity.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx));
922 } else if entry.get().upgrade().is_some() {
923 if is_remote {
924 return Ok(());
925 } else {
926 debug_panic!("buffer {remote_id} was already registered");
927 anyhow::bail!("buffer {remote_id} was already registered");
928 }
929 }
930 entry.insert(open_buffer);
931 _expect_path_to_exist = true;
932 }
933 }
934
935 if let Some(path) = path {
936 self.path_to_buffer_id.insert(path, remote_id);
937 }
938
939 cx.subscribe(&buffer_entity, Self::on_buffer_event).detach();
940 cx.emit(BufferStoreEvent::BufferAdded(buffer_entity));
941 Ok(())
942 }
943
944 pub fn buffers(&self) -> impl '_ + Iterator<Item = Entity<Buffer>> {
945 self.opened_buffers
946 .values()
947 .filter_map(|buffer| buffer.upgrade())
948 }
949
950 pub fn loading_buffers(
951 &self,
952 ) -> impl Iterator<Item = (&ProjectPath, impl Future<Output = Result<Entity<Buffer>>>)> {
953 self.loading_buffers.iter().map(|(path, task)| {
954 let task = task.clone();
955 (path, async move {
956 task.await.map_err(|e| {
957 if e.error_code() != ErrorCode::Internal {
958 anyhow!(e.error_code())
959 } else {
960 anyhow!("{e}")
961 }
962 })
963 })
964 })
965 }
966
967 pub fn buffer_id_for_project_path(&self, project_path: &ProjectPath) -> Option<&BufferId> {
968 self.path_to_buffer_id.get(project_path)
969 }
970
971 pub fn get_by_path(&self, path: &ProjectPath) -> Option<Entity<Buffer>> {
972 self.path_to_buffer_id
973 .get(path)
974 .and_then(|buffer_id| self.get(*buffer_id))
975 }
976
977 pub fn get(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
978 self.opened_buffers.get(&buffer_id)?.upgrade()
979 }
980
981 pub fn get_existing(&self, buffer_id: BufferId) -> Result<Entity<Buffer>> {
982 self.get(buffer_id)
983 .with_context(|| format!("unknown buffer id {buffer_id}"))
984 }
985
986 pub fn get_possibly_incomplete(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
987 self.get(buffer_id).or_else(|| {
988 self.as_remote()
989 .and_then(|remote| remote.loading_remote_buffers_by_id.get(&buffer_id).cloned())
990 })
991 }
992
993 pub fn buffer_version_info(&self, cx: &App) -> (Vec<proto::BufferVersion>, Vec<BufferId>) {
994 let buffers = self
995 .buffers()
996 .map(|buffer| {
997 let buffer = buffer.read(cx);
998 proto::BufferVersion {
999 id: buffer.remote_id().into(),
1000 version: language::proto::serialize_version(&buffer.version),
1001 }
1002 })
1003 .collect();
1004 let incomplete_buffer_ids = self
1005 .as_remote()
1006 .map(|remote| remote.incomplete_buffer_ids())
1007 .unwrap_or_default();
1008 (buffers, incomplete_buffer_ids)
1009 }
1010
1011 pub fn disconnected_from_host(&mut self, cx: &mut App) {
1012 for open_buffer in self.opened_buffers.values_mut() {
1013 if let Some(buffer) = open_buffer.upgrade() {
1014 buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1015 }
1016 }
1017
1018 for buffer in self.buffers() {
1019 buffer.update(cx, |buffer, cx| {
1020 buffer.set_capability(Capability::ReadOnly, cx)
1021 });
1022 }
1023
1024 if let Some(remote) = self.as_remote_mut() {
1025 // Wake up all futures currently waiting on a buffer to get opened,
1026 // to give them a chance to fail now that we've disconnected.
1027 remote.remote_buffer_listeners.clear()
1028 }
1029 }
1030
1031 pub fn shared(&mut self, remote_id: u64, downstream_client: AnyProtoClient, _cx: &mut App) {
1032 self.downstream_client = Some((downstream_client, remote_id));
1033 }
1034
1035 pub fn unshared(&mut self, _cx: &mut Context<Self>) {
1036 self.downstream_client.take();
1037 self.forget_shared_buffers();
1038 }
1039
1040 pub fn discard_incomplete(&mut self) {
1041 self.opened_buffers
1042 .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
1043 }
1044
1045 fn buffer_changed_file(&mut self, buffer: Entity<Buffer>, cx: &mut App) -> Option<()> {
1046 let file = File::from_dyn(buffer.read(cx).file())?;
1047
1048 let remote_id = buffer.read(cx).remote_id();
1049 if let Some(entry_id) = file.entry_id {
1050 if let Some(local) = self.as_local_mut() {
1051 match local.local_buffer_ids_by_entry_id.get(&entry_id) {
1052 Some(_) => {
1053 return None;
1054 }
1055 None => {
1056 local
1057 .local_buffer_ids_by_entry_id
1058 .insert(entry_id, remote_id);
1059 }
1060 }
1061 }
1062 self.path_to_buffer_id.insert(
1063 ProjectPath {
1064 worktree_id: file.worktree_id(cx),
1065 path: file.path.clone(),
1066 },
1067 remote_id,
1068 );
1069 };
1070
1071 Some(())
1072 }
1073
1074 pub fn find_search_candidates(
1075 &mut self,
1076 query: &SearchQuery,
1077 mut limit: usize,
1078 fs: Arc<dyn Fs>,
1079 cx: &mut Context<Self>,
1080 ) -> Receiver<Entity<Buffer>> {
1081 let (tx, rx) = smol::channel::unbounded();
1082 let mut open_buffers = HashSet::default();
1083 let mut unnamed_buffers = Vec::new();
1084 for handle in self.buffers() {
1085 let buffer = handle.read(cx);
1086 if self.non_searchable_buffers.contains(&buffer.remote_id()) {
1087 continue;
1088 } else if let Some(entry_id) = buffer.entry_id(cx) {
1089 open_buffers.insert(entry_id);
1090 } else {
1091 limit = limit.saturating_sub(1);
1092 unnamed_buffers.push(handle)
1093 };
1094 }
1095
1096 const MAX_CONCURRENT_BUFFER_OPENS: usize = 64;
1097 let project_paths_rx = self
1098 .worktree_store
1099 .update(cx, |worktree_store, cx| {
1100 worktree_store.find_search_candidates(query.clone(), limit, open_buffers, fs, cx)
1101 })
1102 .chunks(MAX_CONCURRENT_BUFFER_OPENS);
1103
1104 cx.spawn(async move |this, cx| {
1105 for buffer in unnamed_buffers {
1106 tx.send(buffer).await.ok();
1107 }
1108
1109 let mut project_paths_rx = pin!(project_paths_rx);
1110 while let Some(project_paths) = project_paths_rx.next().await {
1111 let buffers = this.update(cx, |this, cx| {
1112 project_paths
1113 .into_iter()
1114 .map(|project_path| this.open_buffer(project_path, cx))
1115 .collect::<Vec<_>>()
1116 })?;
1117 for buffer_task in buffers {
1118 if let Some(buffer) = buffer_task.await.log_err()
1119 && tx.send(buffer).await.is_err()
1120 {
1121 return anyhow::Ok(());
1122 }
1123 }
1124 }
1125 anyhow::Ok(())
1126 })
1127 .detach();
1128 rx
1129 }
1130
1131 fn on_buffer_event(
1132 &mut self,
1133 buffer: Entity<Buffer>,
1134 event: &BufferEvent,
1135 cx: &mut Context<Self>,
1136 ) {
1137 match event {
1138 BufferEvent::FileHandleChanged => {
1139 self.buffer_changed_file(buffer, cx);
1140 }
1141 BufferEvent::Reloaded => {
1142 let Some((downstream_client, project_id)) = self.downstream_client.as_ref() else {
1143 return;
1144 };
1145 let buffer = buffer.read(cx);
1146 downstream_client
1147 .send(proto::BufferReloaded {
1148 project_id: *project_id,
1149 buffer_id: buffer.remote_id().to_proto(),
1150 version: serialize_version(&buffer.version()),
1151 mtime: buffer.saved_mtime().map(|t| t.into()),
1152 line_ending: serialize_line_ending(buffer.line_ending()) as i32,
1153 })
1154 .log_err();
1155 }
1156 BufferEvent::LanguageChanged => {}
1157 _ => {}
1158 }
1159 }
1160
1161 pub async fn handle_update_buffer(
1162 this: Entity<Self>,
1163 envelope: TypedEnvelope<proto::UpdateBuffer>,
1164 mut cx: AsyncApp,
1165 ) -> Result<proto::Ack> {
1166 let payload = envelope.payload;
1167 let buffer_id = BufferId::new(payload.buffer_id)?;
1168 let ops = payload
1169 .operations
1170 .into_iter()
1171 .map(language::proto::deserialize_operation)
1172 .collect::<Result<Vec<_>, _>>()?;
1173 this.update(&mut cx, |this, cx| {
1174 match this.opened_buffers.entry(buffer_id) {
1175 hash_map::Entry::Occupied(mut e) => match e.get_mut() {
1176 OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
1177 OpenBuffer::Complete { buffer, .. } => {
1178 if let Some(buffer) = buffer.upgrade() {
1179 buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx));
1180 }
1181 }
1182 },
1183 hash_map::Entry::Vacant(e) => {
1184 e.insert(OpenBuffer::Operations(ops));
1185 }
1186 }
1187 Ok(proto::Ack {})
1188 })?
1189 }
1190
1191 pub fn register_shared_lsp_handle(
1192 &mut self,
1193 peer_id: proto::PeerId,
1194 buffer_id: BufferId,
1195 handle: OpenLspBufferHandle,
1196 ) {
1197 if let Some(shared_buffers) = self.shared_buffers.get_mut(&peer_id)
1198 && let Some(buffer) = shared_buffers.get_mut(&buffer_id)
1199 {
1200 buffer.lsp_handle = Some(handle);
1201 return;
1202 }
1203 debug_panic!("tried to register shared lsp handle, but buffer was not shared")
1204 }
1205
1206 pub fn handle_synchronize_buffers(
1207 &mut self,
1208 envelope: TypedEnvelope<proto::SynchronizeBuffers>,
1209 cx: &mut Context<Self>,
1210 client: Arc<Client>,
1211 ) -> Result<proto::SynchronizeBuffersResponse> {
1212 let project_id = envelope.payload.project_id;
1213 let mut response = proto::SynchronizeBuffersResponse {
1214 buffers: Default::default(),
1215 };
1216 let Some(guest_id) = envelope.original_sender_id else {
1217 anyhow::bail!("missing original_sender_id on SynchronizeBuffers request");
1218 };
1219
1220 self.shared_buffers.entry(guest_id).or_default().clear();
1221 for buffer in envelope.payload.buffers {
1222 let buffer_id = BufferId::new(buffer.id)?;
1223 let remote_version = language::proto::deserialize_version(&buffer.version);
1224 if let Some(buffer) = self.get(buffer_id) {
1225 self.shared_buffers
1226 .entry(guest_id)
1227 .or_default()
1228 .entry(buffer_id)
1229 .or_insert_with(|| SharedBuffer {
1230 buffer: buffer.clone(),
1231 lsp_handle: None,
1232 });
1233
1234 let buffer = buffer.read(cx);
1235 response.buffers.push(proto::BufferVersion {
1236 id: buffer_id.into(),
1237 version: language::proto::serialize_version(&buffer.version),
1238 });
1239
1240 let operations = buffer.serialize_ops(Some(remote_version), cx);
1241 let client = client.clone();
1242 if let Some(file) = buffer.file() {
1243 client
1244 .send(proto::UpdateBufferFile {
1245 project_id,
1246 buffer_id: buffer_id.into(),
1247 file: Some(file.to_proto(cx)),
1248 })
1249 .log_err();
1250 }
1251
1252 // TODO(max): do something
1253 // client
1254 // .send(proto::UpdateStagedText {
1255 // project_id,
1256 // buffer_id: buffer_id.into(),
1257 // diff_base: buffer.diff_base().map(ToString::to_string),
1258 // })
1259 // .log_err();
1260
1261 client
1262 .send(proto::BufferReloaded {
1263 project_id,
1264 buffer_id: buffer_id.into(),
1265 version: language::proto::serialize_version(buffer.saved_version()),
1266 mtime: buffer.saved_mtime().map(|time| time.into()),
1267 line_ending: language::proto::serialize_line_ending(buffer.line_ending())
1268 as i32,
1269 })
1270 .log_err();
1271
1272 cx.background_spawn(
1273 async move {
1274 let operations = operations.await;
1275 for chunk in split_operations(operations) {
1276 client
1277 .request(proto::UpdateBuffer {
1278 project_id,
1279 buffer_id: buffer_id.into(),
1280 operations: chunk,
1281 })
1282 .await?;
1283 }
1284 anyhow::Ok(())
1285 }
1286 .log_err(),
1287 )
1288 .detach();
1289 }
1290 }
1291 Ok(response)
1292 }
1293
1294 pub fn handle_create_buffer_for_peer(
1295 &mut self,
1296 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
1297 replica_id: u16,
1298 capability: Capability,
1299 cx: &mut Context<Self>,
1300 ) -> Result<()> {
1301 let remote = self
1302 .as_remote_mut()
1303 .context("buffer store is not a remote")?;
1304
1305 if let Some(buffer) =
1306 remote.handle_create_buffer_for_peer(envelope, replica_id, capability, cx)?
1307 {
1308 self.add_buffer(buffer, cx)?;
1309 }
1310
1311 Ok(())
1312 }
1313
1314 pub async fn handle_update_buffer_file(
1315 this: Entity<Self>,
1316 envelope: TypedEnvelope<proto::UpdateBufferFile>,
1317 mut cx: AsyncApp,
1318 ) -> Result<()> {
1319 let buffer_id = envelope.payload.buffer_id;
1320 let buffer_id = BufferId::new(buffer_id)?;
1321
1322 this.update(&mut cx, |this, cx| {
1323 let payload = envelope.payload.clone();
1324 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1325 let file = payload.file.context("invalid file")?;
1326 let worktree = this
1327 .worktree_store
1328 .read(cx)
1329 .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
1330 .context("no such worktree")?;
1331 let file = File::from_proto(file, worktree, cx)?;
1332 let old_file = buffer.update(cx, |buffer, cx| {
1333 let old_file = buffer.file().cloned();
1334 let new_path = file.path.clone();
1335
1336 buffer.file_updated(Arc::new(file), cx);
1337 if old_file.as_ref().is_none_or(|old| *old.path() != new_path) {
1338 Some(old_file)
1339 } else {
1340 None
1341 }
1342 });
1343 if let Some(old_file) = old_file {
1344 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
1345 }
1346 }
1347 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1348 downstream_client
1349 .send(proto::UpdateBufferFile {
1350 project_id: *project_id,
1351 buffer_id: buffer_id.into(),
1352 file: envelope.payload.file,
1353 })
1354 .log_err();
1355 }
1356 Ok(())
1357 })?
1358 }
1359
1360 pub async fn handle_save_buffer(
1361 this: Entity<Self>,
1362 envelope: TypedEnvelope<proto::SaveBuffer>,
1363 mut cx: AsyncApp,
1364 ) -> Result<proto::BufferSaved> {
1365 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1366 let (buffer, project_id) = this.read_with(&cx, |this, _| {
1367 anyhow::Ok((
1368 this.get_existing(buffer_id)?,
1369 this.downstream_client
1370 .as_ref()
1371 .map(|(_, project_id)| *project_id)
1372 .context("project is not shared")?,
1373 ))
1374 })??;
1375 buffer
1376 .update(&mut cx, |buffer, _| {
1377 buffer.wait_for_version(deserialize_version(&envelope.payload.version))
1378 })?
1379 .await?;
1380 let buffer_id = buffer.read_with(&cx, |buffer, _| buffer.remote_id())?;
1381
1382 if let Some(new_path) = envelope.payload.new_path {
1383 let new_path = ProjectPath::from_proto(new_path);
1384 this.update(&mut cx, |this, cx| {
1385 this.save_buffer_as(buffer.clone(), new_path, cx)
1386 })?
1387 .await?;
1388 } else {
1389 this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))?
1390 .await?;
1391 }
1392
1393 buffer.read_with(&cx, |buffer, _| proto::BufferSaved {
1394 project_id,
1395 buffer_id: buffer_id.into(),
1396 version: serialize_version(buffer.saved_version()),
1397 mtime: buffer.saved_mtime().map(|time| time.into()),
1398 })
1399 }
1400
1401 pub async fn handle_close_buffer(
1402 this: Entity<Self>,
1403 envelope: TypedEnvelope<proto::CloseBuffer>,
1404 mut cx: AsyncApp,
1405 ) -> Result<()> {
1406 let peer_id = envelope.sender_id;
1407 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1408 this.update(&mut cx, |this, cx| {
1409 if let Some(shared) = this.shared_buffers.get_mut(&peer_id)
1410 && shared.remove(&buffer_id).is_some()
1411 {
1412 cx.emit(BufferStoreEvent::SharedBufferClosed(peer_id, buffer_id));
1413 if shared.is_empty() {
1414 this.shared_buffers.remove(&peer_id);
1415 }
1416 return;
1417 }
1418 debug_panic!(
1419 "peer_id {} closed buffer_id {} which was either not open or already closed",
1420 peer_id,
1421 buffer_id
1422 )
1423 })
1424 }
1425
1426 pub async fn handle_buffer_saved(
1427 this: Entity<Self>,
1428 envelope: TypedEnvelope<proto::BufferSaved>,
1429 mut cx: AsyncApp,
1430 ) -> Result<()> {
1431 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1432 let version = deserialize_version(&envelope.payload.version);
1433 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1434 this.update(&mut cx, move |this, cx| {
1435 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1436 buffer.update(cx, |buffer, cx| {
1437 buffer.did_save(version, mtime, cx);
1438 });
1439 }
1440
1441 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1442 downstream_client
1443 .send(proto::BufferSaved {
1444 project_id: *project_id,
1445 buffer_id: buffer_id.into(),
1446 mtime: envelope.payload.mtime,
1447 version: envelope.payload.version,
1448 })
1449 .log_err();
1450 }
1451 })
1452 }
1453
1454 pub async fn handle_buffer_reloaded(
1455 this: Entity<Self>,
1456 envelope: TypedEnvelope<proto::BufferReloaded>,
1457 mut cx: AsyncApp,
1458 ) -> Result<()> {
1459 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1460 let version = deserialize_version(&envelope.payload.version);
1461 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1462 let line_ending = deserialize_line_ending(
1463 proto::LineEnding::from_i32(envelope.payload.line_ending)
1464 .context("missing line ending")?,
1465 );
1466 this.update(&mut cx, |this, cx| {
1467 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1468 buffer.update(cx, |buffer, cx| {
1469 buffer.did_reload(version, line_ending, mtime, cx);
1470 });
1471 }
1472
1473 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1474 downstream_client
1475 .send(proto::BufferReloaded {
1476 project_id: *project_id,
1477 buffer_id: buffer_id.into(),
1478 mtime: envelope.payload.mtime,
1479 version: envelope.payload.version,
1480 line_ending: envelope.payload.line_ending,
1481 })
1482 .log_err();
1483 }
1484 })
1485 }
1486
1487 pub fn reload_buffers(
1488 &self,
1489 buffers: HashSet<Entity<Buffer>>,
1490 push_to_history: bool,
1491 cx: &mut Context<Self>,
1492 ) -> Task<Result<ProjectTransaction>> {
1493 if buffers.is_empty() {
1494 return Task::ready(Ok(ProjectTransaction::default()));
1495 }
1496 match &self.state {
1497 BufferStoreState::Local(this) => this.reload_buffers(buffers, push_to_history, cx),
1498 BufferStoreState::Remote(this) => this.reload_buffers(buffers, push_to_history, cx),
1499 }
1500 }
1501
1502 async fn handle_reload_buffers(
1503 this: Entity<Self>,
1504 envelope: TypedEnvelope<proto::ReloadBuffers>,
1505 mut cx: AsyncApp,
1506 ) -> Result<proto::ReloadBuffersResponse> {
1507 let sender_id = envelope.original_sender_id().unwrap_or_default();
1508 let reload = this.update(&mut cx, |this, cx| {
1509 let mut buffers = HashSet::default();
1510 for buffer_id in &envelope.payload.buffer_ids {
1511 let buffer_id = BufferId::new(*buffer_id)?;
1512 buffers.insert(this.get_existing(buffer_id)?);
1513 }
1514 anyhow::Ok(this.reload_buffers(buffers, false, cx))
1515 })??;
1516
1517 let project_transaction = reload.await?;
1518 let project_transaction = this.update(&mut cx, |this, cx| {
1519 this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
1520 })?;
1521 Ok(proto::ReloadBuffersResponse {
1522 transaction: Some(project_transaction),
1523 })
1524 }
1525
1526 pub fn create_buffer_for_peer(
1527 &mut self,
1528 buffer: &Entity<Buffer>,
1529 peer_id: proto::PeerId,
1530 cx: &mut Context<Self>,
1531 ) -> Task<Result<()>> {
1532 let buffer_id = buffer.read(cx).remote_id();
1533 let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
1534 if shared_buffers.contains_key(&buffer_id) {
1535 return Task::ready(Ok(()));
1536 }
1537 shared_buffers.insert(
1538 buffer_id,
1539 SharedBuffer {
1540 buffer: buffer.clone(),
1541 lsp_handle: None,
1542 },
1543 );
1544
1545 let Some((client, project_id)) = self.downstream_client.clone() else {
1546 return Task::ready(Ok(()));
1547 };
1548
1549 cx.spawn(async move |this, cx| {
1550 let Some(buffer) = this.read_with(cx, |this, _| this.get(buffer_id))? else {
1551 return anyhow::Ok(());
1552 };
1553
1554 let operations = buffer.update(cx, |b, cx| b.serialize_ops(None, cx))?;
1555 let operations = operations.await;
1556 let state = buffer.update(cx, |buffer, cx| buffer.to_proto(cx))?;
1557
1558 let initial_state = proto::CreateBufferForPeer {
1559 project_id,
1560 peer_id: Some(peer_id),
1561 variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1562 };
1563
1564 if client.send(initial_state).log_err().is_some() {
1565 let client = client.clone();
1566 cx.background_spawn(async move {
1567 let mut chunks = split_operations(operations).peekable();
1568 while let Some(chunk) = chunks.next() {
1569 let is_last = chunks.peek().is_none();
1570 client.send(proto::CreateBufferForPeer {
1571 project_id,
1572 peer_id: Some(peer_id),
1573 variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
1574 proto::BufferChunk {
1575 buffer_id: buffer_id.into(),
1576 operations: chunk,
1577 is_last,
1578 },
1579 )),
1580 })?;
1581 }
1582 anyhow::Ok(())
1583 })
1584 .await
1585 .log_err();
1586 }
1587 Ok(())
1588 })
1589 }
1590
1591 pub fn forget_shared_buffers(&mut self) {
1592 self.shared_buffers.clear();
1593 }
1594
1595 pub fn forget_shared_buffers_for(&mut self, peer_id: &proto::PeerId) {
1596 self.shared_buffers.remove(peer_id);
1597 }
1598
1599 pub fn update_peer_id(&mut self, old_peer_id: &proto::PeerId, new_peer_id: proto::PeerId) {
1600 if let Some(buffers) = self.shared_buffers.remove(old_peer_id) {
1601 self.shared_buffers.insert(new_peer_id, buffers);
1602 }
1603 }
1604
1605 pub fn has_shared_buffers(&self) -> bool {
1606 !self.shared_buffers.is_empty()
1607 }
1608
1609 pub fn create_local_buffer(
1610 &mut self,
1611 text: &str,
1612 language: Option<Arc<Language>>,
1613 cx: &mut Context<Self>,
1614 ) -> Entity<Buffer> {
1615 let buffer = cx.new(|cx| {
1616 Buffer::local(text, cx)
1617 .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1618 });
1619
1620 self.add_buffer(buffer.clone(), cx).log_err();
1621 let buffer_id = buffer.read(cx).remote_id();
1622
1623 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1624 self.path_to_buffer_id.insert(
1625 ProjectPath {
1626 worktree_id: file.worktree_id(cx),
1627 path: file.path.clone(),
1628 },
1629 buffer_id,
1630 );
1631 let this = self
1632 .as_local_mut()
1633 .expect("local-only method called in a non-local context");
1634 if let Some(entry_id) = file.entry_id {
1635 this.local_buffer_ids_by_entry_id
1636 .insert(entry_id, buffer_id);
1637 }
1638 }
1639 buffer
1640 }
1641
1642 pub fn deserialize_project_transaction(
1643 &mut self,
1644 message: proto::ProjectTransaction,
1645 push_to_history: bool,
1646 cx: &mut Context<Self>,
1647 ) -> Task<Result<ProjectTransaction>> {
1648 if let Some(this) = self.as_remote_mut() {
1649 this.deserialize_project_transaction(message, push_to_history, 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 wait_for_remote_buffer(
1657 &mut self,
1658 id: BufferId,
1659 cx: &mut Context<BufferStore>,
1660 ) -> Task<Result<Entity<Buffer>>> {
1661 if let Some(this) = self.as_remote_mut() {
1662 this.wait_for_remote_buffer(id, cx)
1663 } else {
1664 debug_panic!("not a remote buffer store");
1665 Task::ready(Err(anyhow!("not a remote buffer store")))
1666 }
1667 }
1668
1669 pub fn serialize_project_transaction_for_peer(
1670 &mut self,
1671 project_transaction: ProjectTransaction,
1672 peer_id: proto::PeerId,
1673 cx: &mut Context<Self>,
1674 ) -> proto::ProjectTransaction {
1675 let mut serialized_transaction = proto::ProjectTransaction {
1676 buffer_ids: Default::default(),
1677 transactions: Default::default(),
1678 };
1679 for (buffer, transaction) in project_transaction.0 {
1680 self.create_buffer_for_peer(&buffer, peer_id, cx)
1681 .detach_and_log_err(cx);
1682 serialized_transaction
1683 .buffer_ids
1684 .push(buffer.read(cx).remote_id().into());
1685 serialized_transaction
1686 .transactions
1687 .push(language::proto::serialize_transaction(&transaction));
1688 }
1689 serialized_transaction
1690 }
1691
1692 pub(crate) fn mark_buffer_as_non_searchable(&mut self, buffer_id: BufferId) {
1693 self.non_searchable_buffers.insert(buffer_id);
1694 }
1695}
1696
1697impl OpenBuffer {
1698 fn upgrade(&self) -> Option<Entity<Buffer>> {
1699 match self {
1700 OpenBuffer::Complete { buffer, .. } => buffer.upgrade(),
1701 OpenBuffer::Operations(_) => None,
1702 }
1703 }
1704}
1705
1706fn is_not_found_error(error: &anyhow::Error) -> bool {
1707 error
1708 .root_cause()
1709 .downcast_ref::<io::Error>()
1710 .is_some_and(|err| err.kind() == io::ErrorKind::NotFound)
1711}