1mod ignore;
   2mod lsp_command;
   3pub mod search;
   4pub mod terminals;
   5pub mod worktree;
   6
   7#[cfg(test)]
   8mod project_tests;
   9
  10use anyhow::{anyhow, Context, Result};
  11use client::{proto, Client, TypedEnvelope, UserStore};
  12use clock::ReplicaId;
  13use collections::{hash_map, BTreeMap, HashMap, HashSet};
  14use copilot::Copilot;
  15use futures::{
  16    channel::mpsc::{self, UnboundedReceiver},
  17    future::{try_join_all, Shared},
  18    stream::FuturesUnordered,
  19    AsyncWriteExt, Future, FutureExt, StreamExt, TryFutureExt,
  20};
  21use globset::{Glob, GlobSet, GlobSetBuilder};
  22use gpui::{
  23    AnyModelHandle, AppContext, AsyncAppContext, BorrowAppContext, Entity, ModelContext,
  24    ModelHandle, Task, WeakModelHandle,
  25};
  26use language::{
  27    point_to_lsp,
  28    proto::{
  29        deserialize_anchor, deserialize_fingerprint, deserialize_line_ending, deserialize_version,
  30        serialize_anchor, serialize_version,
  31    },
  32    range_from_lsp, range_to_lsp, Anchor, Bias, Buffer, CachedLspAdapter, CodeAction, CodeLabel,
  33    Completion, Diagnostic, DiagnosticEntry, DiagnosticSet, Diff, Event as BufferEvent, File as _,
  34    Language, LanguageRegistry, LanguageServerName, LocalFile, OffsetRangeExt, Operation, Patch,
  35    PendingLanguageServer, PointUtf16, RopeFingerprint, TextBufferSnapshot, ToOffset, ToPointUtf16,
  36    Transaction, Unclipped,
  37};
  38use lsp::{
  39    DiagnosticSeverity, DiagnosticTag, DidChangeWatchedFilesRegistrationOptions,
  40    DocumentHighlightKind, LanguageServer, LanguageServerId,
  41};
  42use lsp_command::*;
  43use postage::watch;
  44use rand::prelude::*;
  45use search::SearchQuery;
  46use serde::Serialize;
  47use settings::{FormatOnSave, Formatter, Settings};
  48use sha2::{Digest, Sha256};
  49use similar::{ChangeTag, TextDiff};
  50use std::{
  51    cell::RefCell,
  52    cmp::{self, Ordering},
  53    convert::TryInto,
  54    hash::Hash,
  55    mem,
  56    num::NonZeroU32,
  57    ops::Range,
  58    path::{Component, Path, PathBuf},
  59    rc::Rc,
  60    str,
  61    sync::{
  62        atomic::{AtomicUsize, Ordering::SeqCst},
  63        Arc,
  64    },
  65    time::{Duration, Instant, SystemTime},
  66};
  67
  68use terminals::Terminals;
  69
  70use util::{debug_panic, defer, merge_json_value_into, post_inc, ResultExt, TryFutureExt as _};
  71
  72pub use fs::*;
  73pub use worktree::*;
  74
  75pub trait Item {
  76    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
  77    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath>;
  78}
  79
  80// Language server state is stored across 3 collections:
  81//     language_servers =>
  82//         a mapping from unique server id to LanguageServerState which can either be a task for a
  83//         server in the process of starting, or a running server with adapter and language server arcs
  84//     language_server_ids => a mapping from worktreeId and server name to the unique server id
  85//     language_server_statuses => a mapping from unique server id to the current server status
  86//
  87// Multiple worktrees can map to the same language server for example when you jump to the definition
  88// of a file in the standard library. So language_server_ids is used to look up which server is active
  89// for a given worktree and language server name
  90//
  91// When starting a language server, first the id map is checked to make sure a server isn't already available
  92// for that worktree. If there is one, it finishes early. Otherwise, a new id is allocated and and
  93// the Starting variant of LanguageServerState is stored in the language_servers map.
  94pub struct Project {
  95    worktrees: Vec<WorktreeHandle>,
  96    active_entry: Option<ProjectEntryId>,
  97    buffer_ordered_messages_tx: mpsc::UnboundedSender<BufferOrderedMessage>,
  98    languages: Arc<LanguageRegistry>,
  99    language_servers: HashMap<LanguageServerId, LanguageServerState>,
 100    language_server_ids: HashMap<(WorktreeId, LanguageServerName), LanguageServerId>,
 101    language_server_statuses: BTreeMap<LanguageServerId, LanguageServerStatus>,
 102    last_workspace_edits_by_language_server: HashMap<LanguageServerId, ProjectTransaction>,
 103    client: Arc<client::Client>,
 104    next_entry_id: Arc<AtomicUsize>,
 105    join_project_response_message_id: u32,
 106    next_diagnostic_group_id: usize,
 107    user_store: ModelHandle<UserStore>,
 108    fs: Arc<dyn Fs>,
 109    client_state: Option<ProjectClientState>,
 110    collaborators: HashMap<proto::PeerId, Collaborator>,
 111    client_subscriptions: Vec<client::Subscription>,
 112    _subscriptions: Vec<gpui::Subscription>,
 113    next_buffer_id: u64,
 114    opened_buffer: (watch::Sender<()>, watch::Receiver<()>),
 115    shared_buffers: HashMap<proto::PeerId, HashSet<u64>>,
 116    #[allow(clippy::type_complexity)]
 117    loading_buffers_by_path: HashMap<
 118        ProjectPath,
 119        postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
 120    >,
 121    #[allow(clippy::type_complexity)]
 122    loading_local_worktrees:
 123        HashMap<Arc<Path>, Shared<Task<Result<ModelHandle<Worktree>, Arc<anyhow::Error>>>>>,
 124    opened_buffers: HashMap<u64, OpenBuffer>,
 125    local_buffer_ids_by_path: HashMap<ProjectPath, u64>,
 126    local_buffer_ids_by_entry_id: HashMap<ProjectEntryId, u64>,
 127    /// A mapping from a buffer ID to None means that we've started waiting for an ID but haven't finished loading it.
 128    /// Used for re-issuing buffer requests when peers temporarily disconnect
 129    incomplete_remote_buffers: HashMap<u64, Option<ModelHandle<Buffer>>>,
 130    buffer_snapshots: HashMap<u64, HashMap<LanguageServerId, Vec<LspBufferSnapshot>>>, // buffer_id -> server_id -> vec of snapshots
 131    buffers_being_formatted: HashSet<u64>,
 132    nonce: u128,
 133    _maintain_buffer_languages: Task<()>,
 134    _maintain_workspace_config: Task<()>,
 135    terminals: Terminals,
 136    copilot_enabled: bool,
 137}
 138
 139struct LspBufferSnapshot {
 140    version: i32,
 141    snapshot: TextBufferSnapshot,
 142}
 143
 144/// Message ordered with respect to buffer operations
 145enum BufferOrderedMessage {
 146    Operation {
 147        buffer_id: u64,
 148        operation: proto::Operation,
 149    },
 150    LanguageServerUpdate {
 151        language_server_id: LanguageServerId,
 152        message: proto::update_language_server::Variant,
 153    },
 154    Resync,
 155}
 156
 157enum LocalProjectUpdate {
 158    WorktreesChanged,
 159    CreateBufferForPeer {
 160        peer_id: proto::PeerId,
 161        buffer_id: u64,
 162    },
 163}
 164
 165enum OpenBuffer {
 166    Strong(ModelHandle<Buffer>),
 167    Weak(WeakModelHandle<Buffer>),
 168    Operations(Vec<Operation>),
 169}
 170
 171enum WorktreeHandle {
 172    Strong(ModelHandle<Worktree>),
 173    Weak(WeakModelHandle<Worktree>),
 174}
 175
 176enum ProjectClientState {
 177    Local {
 178        remote_id: u64,
 179        updates_tx: mpsc::UnboundedSender<LocalProjectUpdate>,
 180        _send_updates: Task<()>,
 181    },
 182    Remote {
 183        sharing_has_stopped: bool,
 184        remote_id: u64,
 185        replica_id: ReplicaId,
 186    },
 187}
 188
 189#[derive(Clone, Debug)]
 190pub struct Collaborator {
 191    pub peer_id: proto::PeerId,
 192    pub replica_id: ReplicaId,
 193}
 194
 195#[derive(Clone, Debug, PartialEq, Eq)]
 196pub enum Event {
 197    LanguageServerAdded(LanguageServerId),
 198    LanguageServerRemoved(LanguageServerId),
 199    ActiveEntryChanged(Option<ProjectEntryId>),
 200    WorktreeAdded,
 201    WorktreeRemoved(WorktreeId),
 202    DiskBasedDiagnosticsStarted {
 203        language_server_id: LanguageServerId,
 204    },
 205    DiskBasedDiagnosticsFinished {
 206        language_server_id: LanguageServerId,
 207    },
 208    DiagnosticsUpdated {
 209        path: ProjectPath,
 210        language_server_id: LanguageServerId,
 211    },
 212    RemoteIdChanged(Option<u64>),
 213    DisconnectedFromHost,
 214    Closed,
 215    CollaboratorUpdated {
 216        old_peer_id: proto::PeerId,
 217        new_peer_id: proto::PeerId,
 218    },
 219    CollaboratorLeft(proto::PeerId),
 220}
 221
 222pub enum LanguageServerState {
 223    Starting(Task<Option<Arc<LanguageServer>>>),
 224    Running {
 225        language: Arc<Language>,
 226        adapter: Arc<CachedLspAdapter>,
 227        server: Arc<LanguageServer>,
 228        watched_paths: HashMap<WorktreeId, GlobSet>,
 229        simulate_disk_based_diagnostics_completion: Option<Task<()>>,
 230    },
 231}
 232
 233#[derive(Serialize)]
 234pub struct LanguageServerStatus {
 235    pub name: String,
 236    pub pending_work: BTreeMap<String, LanguageServerProgress>,
 237    pub has_pending_diagnostic_updates: bool,
 238    progress_tokens: HashSet<String>,
 239}
 240
 241#[derive(Clone, Debug, Serialize)]
 242pub struct LanguageServerProgress {
 243    pub message: Option<String>,
 244    pub percentage: Option<usize>,
 245    #[serde(skip_serializing)]
 246    pub last_update_at: Instant,
 247}
 248
 249#[derive(Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
 250pub struct ProjectPath {
 251    pub worktree_id: WorktreeId,
 252    pub path: Arc<Path>,
 253}
 254
 255#[derive(Copy, Clone, Debug, Default, PartialEq, Serialize)]
 256pub struct DiagnosticSummary {
 257    pub error_count: usize,
 258    pub warning_count: usize,
 259}
 260
 261#[derive(Debug, Clone)]
 262pub struct Location {
 263    pub buffer: ModelHandle<Buffer>,
 264    pub range: Range<language::Anchor>,
 265}
 266
 267#[derive(Debug, Clone)]
 268pub struct LocationLink {
 269    pub origin: Option<Location>,
 270    pub target: Location,
 271}
 272
 273#[derive(Debug)]
 274pub struct DocumentHighlight {
 275    pub range: Range<language::Anchor>,
 276    pub kind: DocumentHighlightKind,
 277}
 278
 279#[derive(Clone, Debug)]
 280pub struct Symbol {
 281    pub language_server_name: LanguageServerName,
 282    pub source_worktree_id: WorktreeId,
 283    pub path: ProjectPath,
 284    pub label: CodeLabel,
 285    pub name: String,
 286    pub kind: lsp::SymbolKind,
 287    pub range: Range<Unclipped<PointUtf16>>,
 288    pub signature: [u8; 32],
 289}
 290
 291#[derive(Clone, Debug, PartialEq)]
 292pub struct HoverBlock {
 293    pub text: String,
 294    pub kind: HoverBlockKind,
 295}
 296
 297#[derive(Clone, Debug, PartialEq)]
 298pub enum HoverBlockKind {
 299    PlainText,
 300    Markdown,
 301    Code { language: String },
 302}
 303
 304#[derive(Debug)]
 305pub struct Hover {
 306    pub contents: Vec<HoverBlock>,
 307    pub range: Option<Range<language::Anchor>>,
 308}
 309
 310#[derive(Default)]
 311pub struct ProjectTransaction(pub HashMap<ModelHandle<Buffer>, language::Transaction>);
 312
 313impl DiagnosticSummary {
 314    fn new<'a, T: 'a>(diagnostics: impl IntoIterator<Item = &'a DiagnosticEntry<T>>) -> Self {
 315        let mut this = Self {
 316            error_count: 0,
 317            warning_count: 0,
 318        };
 319
 320        for entry in diagnostics {
 321            if entry.diagnostic.is_primary {
 322                match entry.diagnostic.severity {
 323                    DiagnosticSeverity::ERROR => this.error_count += 1,
 324                    DiagnosticSeverity::WARNING => this.warning_count += 1,
 325                    _ => {}
 326                }
 327            }
 328        }
 329
 330        this
 331    }
 332
 333    pub fn is_empty(&self) -> bool {
 334        self.error_count == 0 && self.warning_count == 0
 335    }
 336
 337    pub fn to_proto(
 338        &self,
 339        language_server_id: LanguageServerId,
 340        path: &Path,
 341    ) -> proto::DiagnosticSummary {
 342        proto::DiagnosticSummary {
 343            path: path.to_string_lossy().to_string(),
 344            language_server_id: language_server_id.0 as u64,
 345            error_count: self.error_count as u32,
 346            warning_count: self.warning_count as u32,
 347        }
 348    }
 349}
 350
 351#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
 352pub struct ProjectEntryId(usize);
 353
 354impl ProjectEntryId {
 355    pub const MAX: Self = Self(usize::MAX);
 356
 357    pub fn new(counter: &AtomicUsize) -> Self {
 358        Self(counter.fetch_add(1, SeqCst))
 359    }
 360
 361    pub fn from_proto(id: u64) -> Self {
 362        Self(id as usize)
 363    }
 364
 365    pub fn to_proto(&self) -> u64 {
 366        self.0 as u64
 367    }
 368
 369    pub fn to_usize(&self) -> usize {
 370        self.0
 371    }
 372}
 373
 374#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 375pub enum FormatTrigger {
 376    Save,
 377    Manual,
 378}
 379
 380impl FormatTrigger {
 381    fn from_proto(value: i32) -> FormatTrigger {
 382        match value {
 383            0 => FormatTrigger::Save,
 384            1 => FormatTrigger::Manual,
 385            _ => FormatTrigger::Save,
 386        }
 387    }
 388}
 389
 390impl Project {
 391    pub fn init(client: &Arc<Client>) {
 392        client.add_model_message_handler(Self::handle_add_collaborator);
 393        client.add_model_message_handler(Self::handle_update_project_collaborator);
 394        client.add_model_message_handler(Self::handle_remove_collaborator);
 395        client.add_model_message_handler(Self::handle_buffer_reloaded);
 396        client.add_model_message_handler(Self::handle_buffer_saved);
 397        client.add_model_message_handler(Self::handle_start_language_server);
 398        client.add_model_message_handler(Self::handle_update_language_server);
 399        client.add_model_message_handler(Self::handle_update_project);
 400        client.add_model_message_handler(Self::handle_unshare_project);
 401        client.add_model_message_handler(Self::handle_create_buffer_for_peer);
 402        client.add_model_message_handler(Self::handle_update_buffer_file);
 403        client.add_model_request_handler(Self::handle_update_buffer);
 404        client.add_model_message_handler(Self::handle_update_diagnostic_summary);
 405        client.add_model_message_handler(Self::handle_update_worktree);
 406        client.add_model_request_handler(Self::handle_create_project_entry);
 407        client.add_model_request_handler(Self::handle_rename_project_entry);
 408        client.add_model_request_handler(Self::handle_copy_project_entry);
 409        client.add_model_request_handler(Self::handle_delete_project_entry);
 410        client.add_model_request_handler(Self::handle_apply_additional_edits_for_completion);
 411        client.add_model_request_handler(Self::handle_apply_code_action);
 412        client.add_model_request_handler(Self::handle_reload_buffers);
 413        client.add_model_request_handler(Self::handle_synchronize_buffers);
 414        client.add_model_request_handler(Self::handle_format_buffers);
 415        client.add_model_request_handler(Self::handle_lsp_command::<GetCodeActions>);
 416        client.add_model_request_handler(Self::handle_lsp_command::<GetCompletions>);
 417        client.add_model_request_handler(Self::handle_lsp_command::<GetHover>);
 418        client.add_model_request_handler(Self::handle_lsp_command::<GetDefinition>);
 419        client.add_model_request_handler(Self::handle_lsp_command::<GetTypeDefinition>);
 420        client.add_model_request_handler(Self::handle_lsp_command::<GetDocumentHighlights>);
 421        client.add_model_request_handler(Self::handle_lsp_command::<GetReferences>);
 422        client.add_model_request_handler(Self::handle_lsp_command::<PrepareRename>);
 423        client.add_model_request_handler(Self::handle_lsp_command::<PerformRename>);
 424        client.add_model_request_handler(Self::handle_search_project);
 425        client.add_model_request_handler(Self::handle_get_project_symbols);
 426        client.add_model_request_handler(Self::handle_open_buffer_for_symbol);
 427        client.add_model_request_handler(Self::handle_open_buffer_by_id);
 428        client.add_model_request_handler(Self::handle_open_buffer_by_path);
 429        client.add_model_request_handler(Self::handle_save_buffer);
 430        client.add_model_message_handler(Self::handle_update_diff_base);
 431    }
 432
 433    pub fn local(
 434        client: Arc<Client>,
 435        user_store: ModelHandle<UserStore>,
 436        languages: Arc<LanguageRegistry>,
 437        fs: Arc<dyn Fs>,
 438        cx: &mut AppContext,
 439    ) -> ModelHandle<Self> {
 440        cx.add_model(|cx: &mut ModelContext<Self>| {
 441            let (tx, rx) = mpsc::unbounded();
 442            cx.spawn_weak(|this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 443                .detach();
 444            Self {
 445                worktrees: Default::default(),
 446                buffer_ordered_messages_tx: tx,
 447                collaborators: Default::default(),
 448                next_buffer_id: 0,
 449                opened_buffers: Default::default(),
 450                shared_buffers: Default::default(),
 451                incomplete_remote_buffers: Default::default(),
 452                loading_buffers_by_path: Default::default(),
 453                loading_local_worktrees: Default::default(),
 454                local_buffer_ids_by_path: Default::default(),
 455                local_buffer_ids_by_entry_id: Default::default(),
 456                buffer_snapshots: Default::default(),
 457                join_project_response_message_id: 0,
 458                client_state: None,
 459                opened_buffer: watch::channel(),
 460                client_subscriptions: Vec::new(),
 461                _subscriptions: vec![cx.observe_global::<Settings, _>(Self::on_settings_changed)],
 462                _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 463                _maintain_workspace_config: Self::maintain_workspace_config(languages.clone(), cx),
 464                active_entry: None,
 465                languages,
 466                client,
 467                user_store,
 468                fs,
 469                next_entry_id: Default::default(),
 470                next_diagnostic_group_id: Default::default(),
 471                language_servers: Default::default(),
 472                language_server_ids: Default::default(),
 473                language_server_statuses: Default::default(),
 474                last_workspace_edits_by_language_server: Default::default(),
 475                buffers_being_formatted: Default::default(),
 476                nonce: StdRng::from_entropy().gen(),
 477                terminals: Terminals {
 478                    local_handles: Vec::new(),
 479                },
 480                copilot_enabled: Copilot::global(cx).is_some(),
 481            }
 482        })
 483    }
 484
 485    pub async fn remote(
 486        remote_id: u64,
 487        client: Arc<Client>,
 488        user_store: ModelHandle<UserStore>,
 489        languages: Arc<LanguageRegistry>,
 490        fs: Arc<dyn Fs>,
 491        mut cx: AsyncAppContext,
 492    ) -> Result<ModelHandle<Self>> {
 493        client.authenticate_and_connect(true, &cx).await?;
 494
 495        let subscription = client.subscribe_to_entity(remote_id)?;
 496        let response = client
 497            .request_envelope(proto::JoinProject {
 498                project_id: remote_id,
 499            })
 500            .await?;
 501        let this = cx.add_model(|cx| {
 502            let replica_id = response.payload.replica_id as ReplicaId;
 503
 504            let mut worktrees = Vec::new();
 505            for worktree in response.payload.worktrees {
 506                let worktree = cx.update(|cx| {
 507                    Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx)
 508                });
 509                worktrees.push(worktree);
 510            }
 511
 512            let (tx, rx) = mpsc::unbounded();
 513            cx.spawn_weak(|this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 514                .detach();
 515            let mut this = Self {
 516                worktrees: Vec::new(),
 517                buffer_ordered_messages_tx: tx,
 518                loading_buffers_by_path: Default::default(),
 519                next_buffer_id: 0,
 520                opened_buffer: watch::channel(),
 521                shared_buffers: Default::default(),
 522                incomplete_remote_buffers: Default::default(),
 523                loading_local_worktrees: Default::default(),
 524                local_buffer_ids_by_path: Default::default(),
 525                local_buffer_ids_by_entry_id: Default::default(),
 526                active_entry: None,
 527                collaborators: Default::default(),
 528                join_project_response_message_id: response.message_id,
 529                _maintain_buffer_languages: Self::maintain_buffer_languages(&languages, cx),
 530                _maintain_workspace_config: Self::maintain_workspace_config(languages.clone(), cx),
 531                languages,
 532                user_store: user_store.clone(),
 533                fs,
 534                next_entry_id: Default::default(),
 535                next_diagnostic_group_id: Default::default(),
 536                client_subscriptions: Default::default(),
 537                _subscriptions: Default::default(),
 538                client: client.clone(),
 539                client_state: Some(ProjectClientState::Remote {
 540                    sharing_has_stopped: false,
 541                    remote_id,
 542                    replica_id,
 543                }),
 544                language_servers: Default::default(),
 545                language_server_ids: Default::default(),
 546                language_server_statuses: response
 547                    .payload
 548                    .language_servers
 549                    .into_iter()
 550                    .map(|server| {
 551                        (
 552                            LanguageServerId(server.id as usize),
 553                            LanguageServerStatus {
 554                                name: server.name,
 555                                pending_work: Default::default(),
 556                                has_pending_diagnostic_updates: false,
 557                                progress_tokens: Default::default(),
 558                            },
 559                        )
 560                    })
 561                    .collect(),
 562                last_workspace_edits_by_language_server: Default::default(),
 563                opened_buffers: Default::default(),
 564                buffers_being_formatted: Default::default(),
 565                buffer_snapshots: Default::default(),
 566                nonce: StdRng::from_entropy().gen(),
 567                terminals: Terminals {
 568                    local_handles: Vec::new(),
 569                },
 570                copilot_enabled: Copilot::global(cx).is_some(),
 571            };
 572            for worktree in worktrees {
 573                let _ = this.add_worktree(&worktree, cx);
 574            }
 575            this
 576        });
 577        let subscription = subscription.set_model(&this, &mut cx);
 578
 579        let user_ids = response
 580            .payload
 581            .collaborators
 582            .iter()
 583            .map(|peer| peer.user_id)
 584            .collect();
 585        user_store
 586            .update(&mut cx, |user_store, cx| user_store.get_users(user_ids, cx))
 587            .await?;
 588
 589        this.update(&mut cx, |this, cx| {
 590            this.set_collaborators_from_proto(response.payload.collaborators, cx)?;
 591            this.client_subscriptions.push(subscription);
 592            anyhow::Ok(())
 593        })?;
 594
 595        Ok(this)
 596    }
 597
 598    #[cfg(any(test, feature = "test-support"))]
 599    pub async fn test(
 600        fs: Arc<dyn Fs>,
 601        root_paths: impl IntoIterator<Item = &Path>,
 602        cx: &mut gpui::TestAppContext,
 603    ) -> ModelHandle<Project> {
 604        if !cx.read(|cx| cx.has_global::<Settings>()) {
 605            cx.update(|cx| {
 606                cx.set_global(Settings::test(cx));
 607            });
 608        }
 609
 610        let mut languages = LanguageRegistry::test();
 611        languages.set_executor(cx.background());
 612        let http_client = util::http::FakeHttpClient::with_404_response();
 613        let client = cx.update(|cx| client::Client::new(http_client.clone(), cx));
 614        let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http_client, cx));
 615        let project =
 616            cx.update(|cx| Project::local(client, user_store, Arc::new(languages), fs, cx));
 617        for path in root_paths {
 618            let (tree, _) = project
 619                .update(cx, |project, cx| {
 620                    project.find_or_create_local_worktree(path, true, cx)
 621                })
 622                .await
 623                .unwrap();
 624            tree.read_with(cx, |tree, _| tree.as_local().unwrap().scan_complete())
 625                .await;
 626        }
 627        project
 628    }
 629
 630    fn on_settings_changed(&mut self, cx: &mut ModelContext<Self>) {
 631        let settings = cx.global::<Settings>();
 632
 633        let mut language_servers_to_start = Vec::new();
 634        for buffer in self.opened_buffers.values() {
 635            if let Some(buffer) = buffer.upgrade(cx) {
 636                let buffer = buffer.read(cx);
 637                if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language())
 638                {
 639                    if settings.enable_language_server(Some(&language.name())) {
 640                        let worktree = file.worktree.read(cx);
 641                        language_servers_to_start.push((
 642                            worktree.id(),
 643                            worktree.as_local().unwrap().abs_path().clone(),
 644                            language.clone(),
 645                        ));
 646                    }
 647                }
 648            }
 649        }
 650
 651        let mut language_servers_to_stop = Vec::new();
 652        for language in self.languages.to_vec() {
 653            for lsp_adapter in language.lsp_adapters() {
 654                if !settings.enable_language_server(Some(&language.name())) {
 655                    let lsp_name = &lsp_adapter.name;
 656                    for (worktree_id, started_lsp_name) in self.language_server_ids.keys() {
 657                        if lsp_name == started_lsp_name {
 658                            language_servers_to_stop.push((*worktree_id, started_lsp_name.clone()));
 659                        }
 660                    }
 661                }
 662            }
 663        }
 664
 665        // Stop all newly-disabled language servers.
 666        for (worktree_id, adapter_name) in language_servers_to_stop {
 667            self.stop_language_server(worktree_id, adapter_name, cx)
 668                .detach();
 669        }
 670
 671        // Start all the newly-enabled language servers.
 672        for (worktree_id, worktree_path, language) in language_servers_to_start {
 673            self.start_language_servers(worktree_id, worktree_path, language, cx);
 674        }
 675
 676        if !self.copilot_enabled && Copilot::global(cx).is_some() {
 677            self.copilot_enabled = true;
 678            for buffer in self.opened_buffers.values() {
 679                if let Some(buffer) = buffer.upgrade(cx) {
 680                    self.register_buffer_with_copilot(&buffer, cx);
 681                }
 682            }
 683        }
 684
 685        cx.notify();
 686    }
 687
 688    pub fn buffer_for_id(&self, remote_id: u64, cx: &AppContext) -> Option<ModelHandle<Buffer>> {
 689        self.opened_buffers
 690            .get(&remote_id)
 691            .and_then(|buffer| buffer.upgrade(cx))
 692    }
 693
 694    pub fn languages(&self) -> &Arc<LanguageRegistry> {
 695        &self.languages
 696    }
 697
 698    pub fn client(&self) -> Arc<Client> {
 699        self.client.clone()
 700    }
 701
 702    pub fn user_store(&self) -> ModelHandle<UserStore> {
 703        self.user_store.clone()
 704    }
 705
 706    #[cfg(any(test, feature = "test-support"))]
 707    pub fn opened_buffers(&self, cx: &AppContext) -> Vec<ModelHandle<Buffer>> {
 708        self.opened_buffers
 709            .values()
 710            .filter_map(|b| b.upgrade(cx))
 711            .collect()
 712    }
 713
 714    #[cfg(any(test, feature = "test-support"))]
 715    pub fn has_open_buffer(&self, path: impl Into<ProjectPath>, cx: &AppContext) -> bool {
 716        let path = path.into();
 717        if let Some(worktree) = self.worktree_for_id(path.worktree_id, cx) {
 718            self.opened_buffers.iter().any(|(_, buffer)| {
 719                if let Some(buffer) = buffer.upgrade(cx) {
 720                    if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
 721                        if file.worktree == worktree && file.path() == &path.path {
 722                            return true;
 723                        }
 724                    }
 725                }
 726                false
 727            })
 728        } else {
 729            false
 730        }
 731    }
 732
 733    pub fn fs(&self) -> &Arc<dyn Fs> {
 734        &self.fs
 735    }
 736
 737    pub fn remote_id(&self) -> Option<u64> {
 738        match self.client_state.as_ref()? {
 739            ProjectClientState::Local { remote_id, .. }
 740            | ProjectClientState::Remote { remote_id, .. } => Some(*remote_id),
 741        }
 742    }
 743
 744    pub fn replica_id(&self) -> ReplicaId {
 745        match &self.client_state {
 746            Some(ProjectClientState::Remote { replica_id, .. }) => *replica_id,
 747            _ => 0,
 748        }
 749    }
 750
 751    fn metadata_changed(&mut self, cx: &mut ModelContext<Self>) {
 752        if let Some(ProjectClientState::Local { updates_tx, .. }) = &mut self.client_state {
 753            updates_tx
 754                .unbounded_send(LocalProjectUpdate::WorktreesChanged)
 755                .ok();
 756        }
 757        cx.notify();
 758    }
 759
 760    pub fn collaborators(&self) -> &HashMap<proto::PeerId, Collaborator> {
 761        &self.collaborators
 762    }
 763
 764    /// Collect all worktrees, including ones that don't appear in the project panel
 765    pub fn worktrees<'a>(
 766        &'a self,
 767        cx: &'a AppContext,
 768    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 769        self.worktrees
 770            .iter()
 771            .filter_map(move |worktree| worktree.upgrade(cx))
 772    }
 773
 774    /// Collect all user-visible worktrees, the ones that appear in the project panel
 775    pub fn visible_worktrees<'a>(
 776        &'a self,
 777        cx: &'a AppContext,
 778    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 779        self.worktrees.iter().filter_map(|worktree| {
 780            worktree.upgrade(cx).and_then(|worktree| {
 781                if worktree.read(cx).is_visible() {
 782                    Some(worktree)
 783                } else {
 784                    None
 785                }
 786            })
 787        })
 788    }
 789
 790    pub fn worktree_root_names<'a>(&'a self, cx: &'a AppContext) -> impl Iterator<Item = &'a str> {
 791        self.visible_worktrees(cx)
 792            .map(|tree| tree.read(cx).root_name())
 793    }
 794
 795    pub fn worktree_for_id(
 796        &self,
 797        id: WorktreeId,
 798        cx: &AppContext,
 799    ) -> Option<ModelHandle<Worktree>> {
 800        self.worktrees(cx)
 801            .find(|worktree| worktree.read(cx).id() == id)
 802    }
 803
 804    pub fn worktree_for_entry(
 805        &self,
 806        entry_id: ProjectEntryId,
 807        cx: &AppContext,
 808    ) -> Option<ModelHandle<Worktree>> {
 809        self.worktrees(cx)
 810            .find(|worktree| worktree.read(cx).contains_entry(entry_id))
 811    }
 812
 813    pub fn worktree_id_for_entry(
 814        &self,
 815        entry_id: ProjectEntryId,
 816        cx: &AppContext,
 817    ) -> Option<WorktreeId> {
 818        self.worktree_for_entry(entry_id, cx)
 819            .map(|worktree| worktree.read(cx).id())
 820    }
 821
 822    pub fn contains_paths(&self, paths: &[PathBuf], cx: &AppContext) -> bool {
 823        paths.iter().all(|path| self.contains_path(path, cx))
 824    }
 825
 826    pub fn contains_path(&self, path: &Path, cx: &AppContext) -> bool {
 827        for worktree in self.worktrees(cx) {
 828            let worktree = worktree.read(cx).as_local();
 829            if worktree.map_or(false, |w| w.contains_abs_path(path)) {
 830                return true;
 831            }
 832        }
 833        false
 834    }
 835
 836    pub fn create_entry(
 837        &mut self,
 838        project_path: impl Into<ProjectPath>,
 839        is_directory: bool,
 840        cx: &mut ModelContext<Self>,
 841    ) -> Option<Task<Result<Entry>>> {
 842        let project_path = project_path.into();
 843        let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
 844        if self.is_local() {
 845            Some(worktree.update(cx, |worktree, cx| {
 846                worktree
 847                    .as_local_mut()
 848                    .unwrap()
 849                    .create_entry(project_path.path, is_directory, cx)
 850            }))
 851        } else {
 852            let client = self.client.clone();
 853            let project_id = self.remote_id().unwrap();
 854            Some(cx.spawn_weak(|_, mut cx| async move {
 855                let response = client
 856                    .request(proto::CreateProjectEntry {
 857                        worktree_id: project_path.worktree_id.to_proto(),
 858                        project_id,
 859                        path: project_path.path.to_string_lossy().into(),
 860                        is_directory,
 861                    })
 862                    .await?;
 863                let entry = response
 864                    .entry
 865                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 866                worktree
 867                    .update(&mut cx, |worktree, cx| {
 868                        worktree.as_remote_mut().unwrap().insert_entry(
 869                            entry,
 870                            response.worktree_scan_id as usize,
 871                            cx,
 872                        )
 873                    })
 874                    .await
 875            }))
 876        }
 877    }
 878
 879    pub fn copy_entry(
 880        &mut self,
 881        entry_id: ProjectEntryId,
 882        new_path: impl Into<Arc<Path>>,
 883        cx: &mut ModelContext<Self>,
 884    ) -> Option<Task<Result<Entry>>> {
 885        let worktree = self.worktree_for_entry(entry_id, cx)?;
 886        let new_path = new_path.into();
 887        if self.is_local() {
 888            worktree.update(cx, |worktree, cx| {
 889                worktree
 890                    .as_local_mut()
 891                    .unwrap()
 892                    .copy_entry(entry_id, new_path, cx)
 893            })
 894        } else {
 895            let client = self.client.clone();
 896            let project_id = self.remote_id().unwrap();
 897
 898            Some(cx.spawn_weak(|_, mut cx| async move {
 899                let response = client
 900                    .request(proto::CopyProjectEntry {
 901                        project_id,
 902                        entry_id: entry_id.to_proto(),
 903                        new_path: new_path.to_string_lossy().into(),
 904                    })
 905                    .await?;
 906                let entry = response
 907                    .entry
 908                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 909                worktree
 910                    .update(&mut cx, |worktree, cx| {
 911                        worktree.as_remote_mut().unwrap().insert_entry(
 912                            entry,
 913                            response.worktree_scan_id as usize,
 914                            cx,
 915                        )
 916                    })
 917                    .await
 918            }))
 919        }
 920    }
 921
 922    pub fn rename_entry(
 923        &mut self,
 924        entry_id: ProjectEntryId,
 925        new_path: impl Into<Arc<Path>>,
 926        cx: &mut ModelContext<Self>,
 927    ) -> Option<Task<Result<Entry>>> {
 928        let worktree = self.worktree_for_entry(entry_id, cx)?;
 929        let new_path = new_path.into();
 930        if self.is_local() {
 931            worktree.update(cx, |worktree, cx| {
 932                worktree
 933                    .as_local_mut()
 934                    .unwrap()
 935                    .rename_entry(entry_id, new_path, cx)
 936            })
 937        } else {
 938            let client = self.client.clone();
 939            let project_id = self.remote_id().unwrap();
 940
 941            Some(cx.spawn_weak(|_, mut cx| async move {
 942                let response = client
 943                    .request(proto::RenameProjectEntry {
 944                        project_id,
 945                        entry_id: entry_id.to_proto(),
 946                        new_path: new_path.to_string_lossy().into(),
 947                    })
 948                    .await?;
 949                let entry = response
 950                    .entry
 951                    .ok_or_else(|| anyhow!("missing entry in response"))?;
 952                worktree
 953                    .update(&mut cx, |worktree, cx| {
 954                        worktree.as_remote_mut().unwrap().insert_entry(
 955                            entry,
 956                            response.worktree_scan_id as usize,
 957                            cx,
 958                        )
 959                    })
 960                    .await
 961            }))
 962        }
 963    }
 964
 965    pub fn delete_entry(
 966        &mut self,
 967        entry_id: ProjectEntryId,
 968        cx: &mut ModelContext<Self>,
 969    ) -> Option<Task<Result<()>>> {
 970        let worktree = self.worktree_for_entry(entry_id, cx)?;
 971        if self.is_local() {
 972            worktree.update(cx, |worktree, cx| {
 973                worktree.as_local_mut().unwrap().delete_entry(entry_id, cx)
 974            })
 975        } else {
 976            let client = self.client.clone();
 977            let project_id = self.remote_id().unwrap();
 978            Some(cx.spawn_weak(|_, mut cx| async move {
 979                let response = client
 980                    .request(proto::DeleteProjectEntry {
 981                        project_id,
 982                        entry_id: entry_id.to_proto(),
 983                    })
 984                    .await?;
 985                worktree
 986                    .update(&mut cx, move |worktree, cx| {
 987                        worktree.as_remote_mut().unwrap().delete_entry(
 988                            entry_id,
 989                            response.worktree_scan_id as usize,
 990                            cx,
 991                        )
 992                    })
 993                    .await
 994            }))
 995        }
 996    }
 997
 998    pub fn shared(&mut self, project_id: u64, cx: &mut ModelContext<Self>) -> Result<()> {
 999        if self.client_state.is_some() {
1000            return Err(anyhow!("project was already shared"));
1001        }
1002        self.client_subscriptions.push(
1003            self.client
1004                .subscribe_to_entity(project_id)?
1005                .set_model(&cx.handle(), &mut cx.to_async()),
1006        );
1007
1008        for open_buffer in self.opened_buffers.values_mut() {
1009            match open_buffer {
1010                OpenBuffer::Strong(_) => {}
1011                OpenBuffer::Weak(buffer) => {
1012                    if let Some(buffer) = buffer.upgrade(cx) {
1013                        *open_buffer = OpenBuffer::Strong(buffer);
1014                    }
1015                }
1016                OpenBuffer::Operations(_) => unreachable!(),
1017            }
1018        }
1019
1020        for worktree_handle in self.worktrees.iter_mut() {
1021            match worktree_handle {
1022                WorktreeHandle::Strong(_) => {}
1023                WorktreeHandle::Weak(worktree) => {
1024                    if let Some(worktree) = worktree.upgrade(cx) {
1025                        *worktree_handle = WorktreeHandle::Strong(worktree);
1026                    }
1027                }
1028            }
1029        }
1030
1031        for (server_id, status) in &self.language_server_statuses {
1032            self.client
1033                .send(proto::StartLanguageServer {
1034                    project_id,
1035                    server: Some(proto::LanguageServer {
1036                        id: server_id.0 as u64,
1037                        name: status.name.clone(),
1038                    }),
1039                })
1040                .log_err();
1041        }
1042
1043        let (updates_tx, mut updates_rx) = mpsc::unbounded();
1044        let client = self.client.clone();
1045        self.client_state = Some(ProjectClientState::Local {
1046            remote_id: project_id,
1047            updates_tx,
1048            _send_updates: cx.spawn_weak(move |this, mut cx| async move {
1049                while let Some(update) = updates_rx.next().await {
1050                    let Some(this) = this.upgrade(&cx) else { break };
1051
1052                    match update {
1053                        LocalProjectUpdate::WorktreesChanged => {
1054                            let worktrees = this
1055                                .read_with(&cx, |this, cx| this.worktrees(cx).collect::<Vec<_>>());
1056                            let update_project = this
1057                                .read_with(&cx, |this, cx| {
1058                                    this.client.request(proto::UpdateProject {
1059                                        project_id,
1060                                        worktrees: this.worktree_metadata_protos(cx),
1061                                    })
1062                                })
1063                                .await;
1064                            if update_project.is_ok() {
1065                                for worktree in worktrees {
1066                                    worktree.update(&mut cx, |worktree, cx| {
1067                                        let worktree = worktree.as_local_mut().unwrap();
1068                                        worktree.share(project_id, cx).detach_and_log_err(cx)
1069                                    });
1070                                }
1071                            }
1072                        }
1073                        LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id } => {
1074                            let buffer = this.update(&mut cx, |this, _| {
1075                                let buffer = this.opened_buffers.get(&buffer_id).unwrap();
1076                                let shared_buffers =
1077                                    this.shared_buffers.entry(peer_id).or_default();
1078                                if shared_buffers.insert(buffer_id) {
1079                                    if let OpenBuffer::Strong(buffer) = buffer {
1080                                        Some(buffer.clone())
1081                                    } else {
1082                                        None
1083                                    }
1084                                } else {
1085                                    None
1086                                }
1087                            });
1088
1089                            let Some(buffer) = buffer else { continue };
1090                            let operations =
1091                                buffer.read_with(&cx, |b, cx| b.serialize_ops(None, cx));
1092                            let operations = operations.await;
1093                            let state = buffer.read_with(&cx, |buffer, _| buffer.to_proto());
1094
1095                            let initial_state = proto::CreateBufferForPeer {
1096                                project_id,
1097                                peer_id: Some(peer_id),
1098                                variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1099                            };
1100                            if client.send(initial_state).log_err().is_some() {
1101                                let client = client.clone();
1102                                cx.background()
1103                                    .spawn(async move {
1104                                        let mut chunks = split_operations(operations).peekable();
1105                                        while let Some(chunk) = chunks.next() {
1106                                            let is_last = chunks.peek().is_none();
1107                                            client.send(proto::CreateBufferForPeer {
1108                                                project_id,
1109                                                peer_id: Some(peer_id),
1110                                                variant: Some(
1111                                                    proto::create_buffer_for_peer::Variant::Chunk(
1112                                                        proto::BufferChunk {
1113                                                            buffer_id,
1114                                                            operations: chunk,
1115                                                            is_last,
1116                                                        },
1117                                                    ),
1118                                                ),
1119                                            })?;
1120                                        }
1121                                        anyhow::Ok(())
1122                                    })
1123                                    .await
1124                                    .log_err();
1125                            }
1126                        }
1127                    }
1128                }
1129            }),
1130        });
1131
1132        self.metadata_changed(cx);
1133        cx.emit(Event::RemoteIdChanged(Some(project_id)));
1134        cx.notify();
1135        Ok(())
1136    }
1137
1138    pub fn reshared(
1139        &mut self,
1140        message: proto::ResharedProject,
1141        cx: &mut ModelContext<Self>,
1142    ) -> Result<()> {
1143        self.shared_buffers.clear();
1144        self.set_collaborators_from_proto(message.collaborators, cx)?;
1145        self.metadata_changed(cx);
1146        Ok(())
1147    }
1148
1149    pub fn rejoined(
1150        &mut self,
1151        message: proto::RejoinedProject,
1152        message_id: u32,
1153        cx: &mut ModelContext<Self>,
1154    ) -> Result<()> {
1155        self.join_project_response_message_id = message_id;
1156        self.set_worktrees_from_proto(message.worktrees, cx)?;
1157        self.set_collaborators_from_proto(message.collaborators, cx)?;
1158        self.language_server_statuses = message
1159            .language_servers
1160            .into_iter()
1161            .map(|server| {
1162                (
1163                    LanguageServerId(server.id as usize),
1164                    LanguageServerStatus {
1165                        name: server.name,
1166                        pending_work: Default::default(),
1167                        has_pending_diagnostic_updates: false,
1168                        progress_tokens: Default::default(),
1169                    },
1170                )
1171            })
1172            .collect();
1173        self.buffer_ordered_messages_tx
1174            .unbounded_send(BufferOrderedMessage::Resync)
1175            .unwrap();
1176        cx.notify();
1177        Ok(())
1178    }
1179
1180    pub fn unshare(&mut self, cx: &mut ModelContext<Self>) -> Result<()> {
1181        self.unshare_internal(cx)?;
1182        self.metadata_changed(cx);
1183        cx.notify();
1184        Ok(())
1185    }
1186
1187    fn unshare_internal(&mut self, cx: &mut AppContext) -> Result<()> {
1188        if self.is_remote() {
1189            return Err(anyhow!("attempted to unshare a remote project"));
1190        }
1191
1192        if let Some(ProjectClientState::Local { remote_id, .. }) = self.client_state.take() {
1193            self.collaborators.clear();
1194            self.shared_buffers.clear();
1195            self.client_subscriptions.clear();
1196
1197            for worktree_handle in self.worktrees.iter_mut() {
1198                if let WorktreeHandle::Strong(worktree) = worktree_handle {
1199                    let is_visible = worktree.update(cx, |worktree, _| {
1200                        worktree.as_local_mut().unwrap().unshare();
1201                        worktree.is_visible()
1202                    });
1203                    if !is_visible {
1204                        *worktree_handle = WorktreeHandle::Weak(worktree.downgrade());
1205                    }
1206                }
1207            }
1208
1209            for open_buffer in self.opened_buffers.values_mut() {
1210                // Wake up any tasks waiting for peers' edits to this buffer.
1211                if let Some(buffer) = open_buffer.upgrade(cx) {
1212                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1213                }
1214
1215                if let OpenBuffer::Strong(buffer) = open_buffer {
1216                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1217                }
1218            }
1219
1220            self.client.send(proto::UnshareProject {
1221                project_id: remote_id,
1222            })?;
1223
1224            Ok(())
1225        } else {
1226            Err(anyhow!("attempted to unshare an unshared project"))
1227        }
1228    }
1229
1230    pub fn disconnected_from_host(&mut self, cx: &mut ModelContext<Self>) {
1231        self.disconnected_from_host_internal(cx);
1232        cx.emit(Event::DisconnectedFromHost);
1233        cx.notify();
1234    }
1235
1236    fn disconnected_from_host_internal(&mut self, cx: &mut AppContext) {
1237        if let Some(ProjectClientState::Remote {
1238            sharing_has_stopped,
1239            ..
1240        }) = &mut self.client_state
1241        {
1242            *sharing_has_stopped = true;
1243
1244            self.collaborators.clear();
1245
1246            for worktree in &self.worktrees {
1247                if let Some(worktree) = worktree.upgrade(cx) {
1248                    worktree.update(cx, |worktree, _| {
1249                        if let Some(worktree) = worktree.as_remote_mut() {
1250                            worktree.disconnected_from_host();
1251                        }
1252                    });
1253                }
1254            }
1255
1256            for open_buffer in self.opened_buffers.values_mut() {
1257                // Wake up any tasks waiting for peers' edits to this buffer.
1258                if let Some(buffer) = open_buffer.upgrade(cx) {
1259                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1260                }
1261
1262                if let OpenBuffer::Strong(buffer) = open_buffer {
1263                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1264                }
1265            }
1266
1267            // Wake up all futures currently waiting on a buffer to get opened,
1268            // to give them a chance to fail now that we've disconnected.
1269            *self.opened_buffer.0.borrow_mut() = ();
1270        }
1271    }
1272
1273    pub fn close(&mut self, cx: &mut ModelContext<Self>) {
1274        cx.emit(Event::Closed);
1275    }
1276
1277    pub fn is_read_only(&self) -> bool {
1278        match &self.client_state {
1279            Some(ProjectClientState::Remote {
1280                sharing_has_stopped,
1281                ..
1282            }) => *sharing_has_stopped,
1283            _ => false,
1284        }
1285    }
1286
1287    pub fn is_local(&self) -> bool {
1288        match &self.client_state {
1289            Some(ProjectClientState::Remote { .. }) => false,
1290            _ => true,
1291        }
1292    }
1293
1294    pub fn is_remote(&self) -> bool {
1295        !self.is_local()
1296    }
1297
1298    pub fn create_buffer(
1299        &mut self,
1300        text: &str,
1301        language: Option<Arc<Language>>,
1302        cx: &mut ModelContext<Self>,
1303    ) -> Result<ModelHandle<Buffer>> {
1304        if self.is_remote() {
1305            return Err(anyhow!("creating buffers as a guest is not supported yet"));
1306        }
1307
1308        let buffer = cx.add_model(|cx| {
1309            Buffer::new(self.replica_id(), text, cx)
1310                .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1311        });
1312        self.register_buffer(&buffer, cx)?;
1313        Ok(buffer)
1314    }
1315
1316    pub fn open_path(
1317        &mut self,
1318        path: impl Into<ProjectPath>,
1319        cx: &mut ModelContext<Self>,
1320    ) -> Task<Result<(ProjectEntryId, AnyModelHandle)>> {
1321        let task = self.open_buffer(path, cx);
1322        cx.spawn_weak(|_, cx| async move {
1323            let buffer = task.await?;
1324            let project_entry_id = buffer
1325                .read_with(&cx, |buffer, cx| {
1326                    File::from_dyn(buffer.file()).and_then(|file| file.project_entry_id(cx))
1327                })
1328                .ok_or_else(|| anyhow!("no project entry"))?;
1329
1330            let buffer: &AnyModelHandle = &buffer;
1331            Ok((project_entry_id, buffer.clone()))
1332        })
1333    }
1334
1335    pub fn open_local_buffer(
1336        &mut self,
1337        abs_path: impl AsRef<Path>,
1338        cx: &mut ModelContext<Self>,
1339    ) -> Task<Result<ModelHandle<Buffer>>> {
1340        if let Some((worktree, relative_path)) = self.find_local_worktree(abs_path.as_ref(), cx) {
1341            self.open_buffer((worktree.read(cx).id(), relative_path), cx)
1342        } else {
1343            Task::ready(Err(anyhow!("no such path")))
1344        }
1345    }
1346
1347    pub fn open_buffer(
1348        &mut self,
1349        path: impl Into<ProjectPath>,
1350        cx: &mut ModelContext<Self>,
1351    ) -> Task<Result<ModelHandle<Buffer>>> {
1352        let project_path = path.into();
1353        let worktree = if let Some(worktree) = self.worktree_for_id(project_path.worktree_id, cx) {
1354            worktree
1355        } else {
1356            return Task::ready(Err(anyhow!("no such worktree")));
1357        };
1358
1359        // If there is already a buffer for the given path, then return it.
1360        let existing_buffer = self.get_open_buffer(&project_path, cx);
1361        if let Some(existing_buffer) = existing_buffer {
1362            return Task::ready(Ok(existing_buffer));
1363        }
1364
1365        let loading_watch = match self.loading_buffers_by_path.entry(project_path.clone()) {
1366            // If the given path is already being loaded, then wait for that existing
1367            // task to complete and return the same buffer.
1368            hash_map::Entry::Occupied(e) => e.get().clone(),
1369
1370            // Otherwise, record the fact that this path is now being loaded.
1371            hash_map::Entry::Vacant(entry) => {
1372                let (mut tx, rx) = postage::watch::channel();
1373                entry.insert(rx.clone());
1374
1375                let load_buffer = if worktree.read(cx).is_local() {
1376                    self.open_local_buffer_internal(&project_path.path, &worktree, cx)
1377                } else {
1378                    self.open_remote_buffer_internal(&project_path.path, &worktree, cx)
1379                };
1380
1381                cx.spawn(move |this, mut cx| async move {
1382                    let load_result = load_buffer.await;
1383                    *tx.borrow_mut() = Some(this.update(&mut cx, |this, _| {
1384                        // Record the fact that the buffer is no longer loading.
1385                        this.loading_buffers_by_path.remove(&project_path);
1386                        let buffer = load_result.map_err(Arc::new)?;
1387                        Ok(buffer)
1388                    }));
1389                })
1390                .detach();
1391                rx
1392            }
1393        };
1394
1395        cx.foreground().spawn(async move {
1396            pump_loading_buffer_reciever(loading_watch)
1397                .await
1398                .map_err(|error| anyhow!("{}", error))
1399        })
1400    }
1401
1402    fn open_local_buffer_internal(
1403        &mut self,
1404        path: &Arc<Path>,
1405        worktree: &ModelHandle<Worktree>,
1406        cx: &mut ModelContext<Self>,
1407    ) -> Task<Result<ModelHandle<Buffer>>> {
1408        let buffer_id = post_inc(&mut self.next_buffer_id);
1409        let load_buffer = worktree.update(cx, |worktree, cx| {
1410            let worktree = worktree.as_local_mut().unwrap();
1411            worktree.load_buffer(buffer_id, path, cx)
1412        });
1413        cx.spawn(|this, mut cx| async move {
1414            let buffer = load_buffer.await?;
1415            this.update(&mut cx, |this, cx| this.register_buffer(&buffer, cx))?;
1416            Ok(buffer)
1417        })
1418    }
1419
1420    fn open_remote_buffer_internal(
1421        &mut self,
1422        path: &Arc<Path>,
1423        worktree: &ModelHandle<Worktree>,
1424        cx: &mut ModelContext<Self>,
1425    ) -> Task<Result<ModelHandle<Buffer>>> {
1426        let rpc = self.client.clone();
1427        let project_id = self.remote_id().unwrap();
1428        let remote_worktree_id = worktree.read(cx).id();
1429        let path = path.clone();
1430        let path_string = path.to_string_lossy().to_string();
1431        cx.spawn(|this, mut cx| async move {
1432            let response = rpc
1433                .request(proto::OpenBufferByPath {
1434                    project_id,
1435                    worktree_id: remote_worktree_id.to_proto(),
1436                    path: path_string,
1437                })
1438                .await?;
1439            this.update(&mut cx, |this, cx| {
1440                this.wait_for_remote_buffer(response.buffer_id, cx)
1441            })
1442            .await
1443        })
1444    }
1445
1446    /// LanguageServerName is owned, because it is inserted into a map
1447    fn open_local_buffer_via_lsp(
1448        &mut self,
1449        abs_path: lsp::Url,
1450        language_server_id: LanguageServerId,
1451        language_server_name: LanguageServerName,
1452        cx: &mut ModelContext<Self>,
1453    ) -> Task<Result<ModelHandle<Buffer>>> {
1454        cx.spawn(|this, mut cx| async move {
1455            let abs_path = abs_path
1456                .to_file_path()
1457                .map_err(|_| anyhow!("can't convert URI to path"))?;
1458            let (worktree, relative_path) = if let Some(result) =
1459                this.read_with(&cx, |this, cx| this.find_local_worktree(&abs_path, cx))
1460            {
1461                result
1462            } else {
1463                let worktree = this
1464                    .update(&mut cx, |this, cx| {
1465                        this.create_local_worktree(&abs_path, false, cx)
1466                    })
1467                    .await?;
1468                this.update(&mut cx, |this, cx| {
1469                    this.language_server_ids.insert(
1470                        (worktree.read(cx).id(), language_server_name),
1471                        language_server_id,
1472                    );
1473                });
1474                (worktree, PathBuf::new())
1475            };
1476
1477            let project_path = ProjectPath {
1478                worktree_id: worktree.read_with(&cx, |worktree, _| worktree.id()),
1479                path: relative_path.into(),
1480            };
1481            this.update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
1482                .await
1483        })
1484    }
1485
1486    pub fn open_buffer_by_id(
1487        &mut self,
1488        id: u64,
1489        cx: &mut ModelContext<Self>,
1490    ) -> Task<Result<ModelHandle<Buffer>>> {
1491        if let Some(buffer) = self.buffer_for_id(id, cx) {
1492            Task::ready(Ok(buffer))
1493        } else if self.is_local() {
1494            Task::ready(Err(anyhow!("buffer {} does not exist", id)))
1495        } else if let Some(project_id) = self.remote_id() {
1496            let request = self
1497                .client
1498                .request(proto::OpenBufferById { project_id, id });
1499            cx.spawn(|this, mut cx| async move {
1500                let buffer_id = request.await?.buffer_id;
1501                this.update(&mut cx, |this, cx| {
1502                    this.wait_for_remote_buffer(buffer_id, cx)
1503                })
1504                .await
1505            })
1506        } else {
1507            Task::ready(Err(anyhow!("cannot open buffer while disconnected")))
1508        }
1509    }
1510
1511    pub fn save_buffers(
1512        &self,
1513        buffers: HashSet<ModelHandle<Buffer>>,
1514        cx: &mut ModelContext<Self>,
1515    ) -> Task<Result<()>> {
1516        cx.spawn(|this, mut cx| async move {
1517            let save_tasks = buffers
1518                .into_iter()
1519                .map(|buffer| this.update(&mut cx, |this, cx| this.save_buffer(buffer, cx)));
1520            try_join_all(save_tasks).await?;
1521            Ok(())
1522        })
1523    }
1524
1525    pub fn save_buffer(
1526        &self,
1527        buffer: ModelHandle<Buffer>,
1528        cx: &mut ModelContext<Self>,
1529    ) -> Task<Result<(clock::Global, RopeFingerprint, SystemTime)>> {
1530        let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
1531            return Task::ready(Err(anyhow!("buffer doesn't have a file")));
1532        };
1533        let worktree = file.worktree.clone();
1534        let path = file.path.clone();
1535        worktree.update(cx, |worktree, cx| match worktree {
1536            Worktree::Local(worktree) => worktree.save_buffer(buffer, path, false, cx),
1537            Worktree::Remote(worktree) => worktree.save_buffer(buffer, cx),
1538        })
1539    }
1540
1541    pub fn save_buffer_as(
1542        &mut self,
1543        buffer: ModelHandle<Buffer>,
1544        abs_path: PathBuf,
1545        cx: &mut ModelContext<Self>,
1546    ) -> Task<Result<()>> {
1547        let worktree_task = self.find_or_create_local_worktree(&abs_path, true, cx);
1548        let old_file = File::from_dyn(buffer.read(cx).file())
1549            .filter(|f| f.is_local())
1550            .cloned();
1551        cx.spawn(|this, mut cx| async move {
1552            if let Some(old_file) = &old_file {
1553                this.update(&mut cx, |this, cx| {
1554                    this.unregister_buffer_from_language_servers(&buffer, old_file, cx);
1555                });
1556            }
1557            let (worktree, path) = worktree_task.await?;
1558            worktree
1559                .update(&mut cx, |worktree, cx| match worktree {
1560                    Worktree::Local(worktree) => {
1561                        worktree.save_buffer(buffer.clone(), path.into(), true, cx)
1562                    }
1563                    Worktree::Remote(_) => panic!("cannot remote buffers as new files"),
1564                })
1565                .await?;
1566            this.update(&mut cx, |this, cx| {
1567                this.detect_language_for_buffer(&buffer, cx);
1568                this.register_buffer_with_language_servers(&buffer, cx);
1569            });
1570            Ok(())
1571        })
1572    }
1573
1574    pub fn get_open_buffer(
1575        &mut self,
1576        path: &ProjectPath,
1577        cx: &mut ModelContext<Self>,
1578    ) -> Option<ModelHandle<Buffer>> {
1579        let worktree = self.worktree_for_id(path.worktree_id, cx)?;
1580        self.opened_buffers.values().find_map(|buffer| {
1581            let buffer = buffer.upgrade(cx)?;
1582            let file = File::from_dyn(buffer.read(cx).file())?;
1583            if file.worktree == worktree && file.path() == &path.path {
1584                Some(buffer)
1585            } else {
1586                None
1587            }
1588        })
1589    }
1590
1591    fn register_buffer(
1592        &mut self,
1593        buffer: &ModelHandle<Buffer>,
1594        cx: &mut ModelContext<Self>,
1595    ) -> Result<()> {
1596        buffer.update(cx, |buffer, _| {
1597            buffer.set_language_registry(self.languages.clone())
1598        });
1599
1600        let remote_id = buffer.read(cx).remote_id();
1601        let is_remote = self.is_remote();
1602        let open_buffer = if is_remote || self.is_shared() {
1603            OpenBuffer::Strong(buffer.clone())
1604        } else {
1605            OpenBuffer::Weak(buffer.downgrade())
1606        };
1607
1608        match self.opened_buffers.entry(remote_id) {
1609            hash_map::Entry::Vacant(entry) => {
1610                entry.insert(open_buffer);
1611            }
1612            hash_map::Entry::Occupied(mut entry) => {
1613                if let OpenBuffer::Operations(operations) = entry.get_mut() {
1614                    buffer.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx))?;
1615                } else if entry.get().upgrade(cx).is_some() {
1616                    if is_remote {
1617                        return Ok(());
1618                    } else {
1619                        debug_panic!("buffer {} was already registered", remote_id);
1620                        Err(anyhow!("buffer {} was already registered", remote_id))?;
1621                    }
1622                }
1623                entry.insert(open_buffer);
1624            }
1625        }
1626        cx.subscribe(buffer, |this, buffer, event, cx| {
1627            this.on_buffer_event(buffer, event, cx);
1628        })
1629        .detach();
1630
1631        if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1632            if file.is_local {
1633                self.local_buffer_ids_by_path.insert(
1634                    ProjectPath {
1635                        worktree_id: file.worktree_id(cx),
1636                        path: file.path.clone(),
1637                    },
1638                    remote_id,
1639                );
1640
1641                self.local_buffer_ids_by_entry_id
1642                    .insert(file.entry_id, remote_id);
1643            }
1644        }
1645
1646        self.detect_language_for_buffer(buffer, cx);
1647        self.register_buffer_with_language_servers(buffer, cx);
1648        self.register_buffer_with_copilot(buffer, cx);
1649        cx.observe_release(buffer, |this, buffer, cx| {
1650            if let Some(file) = File::from_dyn(buffer.file()) {
1651                if file.is_local() {
1652                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1653                    for server in this.language_servers_for_buffer(buffer, cx) {
1654                        server
1655                            .1
1656                            .notify::<lsp::notification::DidCloseTextDocument>(
1657                                lsp::DidCloseTextDocumentParams {
1658                                    text_document: lsp::TextDocumentIdentifier::new(uri.clone()),
1659                                },
1660                            )
1661                            .log_err();
1662                    }
1663                }
1664            }
1665        })
1666        .detach();
1667
1668        *self.opened_buffer.0.borrow_mut() = ();
1669        Ok(())
1670    }
1671
1672    fn register_buffer_with_language_servers(
1673        &mut self,
1674        buffer_handle: &ModelHandle<Buffer>,
1675        cx: &mut ModelContext<Self>,
1676    ) {
1677        let buffer = buffer_handle.read(cx);
1678        let buffer_id = buffer.remote_id();
1679
1680        if let Some(file) = File::from_dyn(buffer.file()) {
1681            if !file.is_local() {
1682                return;
1683            }
1684
1685            let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1686            let initial_snapshot = buffer.text_snapshot();
1687            let language = buffer.language().cloned();
1688            let worktree_id = file.worktree_id(cx);
1689
1690            if let Some(local_worktree) = file.worktree.read(cx).as_local() {
1691                for (server_id, diagnostics) in local_worktree.diagnostics_for_path(file.path()) {
1692                    self.update_buffer_diagnostics(buffer_handle, server_id, None, diagnostics, cx)
1693                        .log_err();
1694                }
1695            }
1696
1697            if let Some(language) = language {
1698                for adapter in language.lsp_adapters() {
1699                    let language_id = adapter.language_ids.get(language.name().as_ref()).cloned();
1700                    let server = self
1701                        .language_server_ids
1702                        .get(&(worktree_id, adapter.name.clone()))
1703                        .and_then(|id| self.language_servers.get(id))
1704                        .and_then(|server_state| {
1705                            if let LanguageServerState::Running { server, .. } = server_state {
1706                                Some(server.clone())
1707                            } else {
1708                                None
1709                            }
1710                        });
1711                    let server = match server {
1712                        Some(server) => server,
1713                        None => continue,
1714                    };
1715
1716                    server
1717                        .notify::<lsp::notification::DidOpenTextDocument>(
1718                            lsp::DidOpenTextDocumentParams {
1719                                text_document: lsp::TextDocumentItem::new(
1720                                    uri.clone(),
1721                                    language_id.unwrap_or_default(),
1722                                    0,
1723                                    initial_snapshot.text(),
1724                                ),
1725                            },
1726                        )
1727                        .log_err();
1728
1729                    buffer_handle.update(cx, |buffer, cx| {
1730                        buffer.set_completion_triggers(
1731                            server
1732                                .capabilities()
1733                                .completion_provider
1734                                .as_ref()
1735                                .and_then(|provider| provider.trigger_characters.clone())
1736                                .unwrap_or_default(),
1737                            cx,
1738                        );
1739                    });
1740
1741                    let snapshot = LspBufferSnapshot {
1742                        version: 0,
1743                        snapshot: initial_snapshot.clone(),
1744                    };
1745                    self.buffer_snapshots
1746                        .entry(buffer_id)
1747                        .or_default()
1748                        .insert(server.server_id(), vec![snapshot]);
1749                }
1750            }
1751        }
1752    }
1753
1754    fn unregister_buffer_from_language_servers(
1755        &mut self,
1756        buffer: &ModelHandle<Buffer>,
1757        old_file: &File,
1758        cx: &mut ModelContext<Self>,
1759    ) {
1760        let old_path = match old_file.as_local() {
1761            Some(local) => local.abs_path(cx),
1762            None => return,
1763        };
1764
1765        buffer.update(cx, |buffer, cx| {
1766            let worktree_id = old_file.worktree_id(cx);
1767            let ids = &self.language_server_ids;
1768
1769            let language = buffer.language().cloned();
1770            let adapters = language.iter().flat_map(|language| language.lsp_adapters());
1771            for &server_id in adapters.flat_map(|a| ids.get(&(worktree_id, a.name.clone()))) {
1772                buffer.update_diagnostics(server_id, Default::default(), cx);
1773            }
1774
1775            self.buffer_snapshots.remove(&buffer.remote_id());
1776            let file_url = lsp::Url::from_file_path(old_path).unwrap();
1777            for (_, language_server) in self.language_servers_for_buffer(buffer, cx) {
1778                language_server
1779                    .notify::<lsp::notification::DidCloseTextDocument>(
1780                        lsp::DidCloseTextDocumentParams {
1781                            text_document: lsp::TextDocumentIdentifier::new(file_url.clone()),
1782                        },
1783                    )
1784                    .log_err();
1785            }
1786        });
1787    }
1788
1789    fn register_buffer_with_copilot(
1790        &self,
1791        buffer_handle: &ModelHandle<Buffer>,
1792        cx: &mut ModelContext<Self>,
1793    ) {
1794        if let Some(copilot) = Copilot::global(cx) {
1795            copilot.update(cx, |copilot, cx| copilot.register_buffer(buffer_handle, cx));
1796        }
1797    }
1798
1799    async fn send_buffer_ordered_messages(
1800        this: WeakModelHandle<Self>,
1801        rx: UnboundedReceiver<BufferOrderedMessage>,
1802        mut cx: AsyncAppContext,
1803    ) -> Option<()> {
1804        const MAX_BATCH_SIZE: usize = 128;
1805
1806        let mut operations_by_buffer_id = HashMap::default();
1807        async fn flush_operations(
1808            this: &ModelHandle<Project>,
1809            operations_by_buffer_id: &mut HashMap<u64, Vec<proto::Operation>>,
1810            needs_resync_with_host: &mut bool,
1811            is_local: bool,
1812            cx: &AsyncAppContext,
1813        ) {
1814            for (buffer_id, operations) in operations_by_buffer_id.drain() {
1815                let request = this.read_with(cx, |this, _| {
1816                    let project_id = this.remote_id()?;
1817                    Some(this.client.request(proto::UpdateBuffer {
1818                        buffer_id,
1819                        project_id,
1820                        operations,
1821                    }))
1822                });
1823                if let Some(request) = request {
1824                    if request.await.is_err() && !is_local {
1825                        *needs_resync_with_host = true;
1826                        break;
1827                    }
1828                }
1829            }
1830        }
1831
1832        let mut needs_resync_with_host = false;
1833        let mut changes = rx.ready_chunks(MAX_BATCH_SIZE);
1834
1835        while let Some(changes) = changes.next().await {
1836            let this = this.upgrade(&mut cx)?;
1837            let is_local = this.read_with(&cx, |this, _| this.is_local());
1838
1839            for change in changes {
1840                match change {
1841                    BufferOrderedMessage::Operation {
1842                        buffer_id,
1843                        operation,
1844                    } => {
1845                        if needs_resync_with_host {
1846                            continue;
1847                        }
1848
1849                        operations_by_buffer_id
1850                            .entry(buffer_id)
1851                            .or_insert(Vec::new())
1852                            .push(operation);
1853                    }
1854
1855                    BufferOrderedMessage::Resync => {
1856                        operations_by_buffer_id.clear();
1857                        if this
1858                            .update(&mut cx, |this, cx| this.synchronize_remote_buffers(cx))
1859                            .await
1860                            .is_ok()
1861                        {
1862                            needs_resync_with_host = false;
1863                        }
1864                    }
1865
1866                    BufferOrderedMessage::LanguageServerUpdate {
1867                        language_server_id,
1868                        message,
1869                    } => {
1870                        flush_operations(
1871                            &this,
1872                            &mut operations_by_buffer_id,
1873                            &mut needs_resync_with_host,
1874                            is_local,
1875                            &cx,
1876                        )
1877                        .await;
1878
1879                        this.read_with(&cx, |this, _| {
1880                            if let Some(project_id) = this.remote_id() {
1881                                this.client
1882                                    .send(proto::UpdateLanguageServer {
1883                                        project_id,
1884                                        language_server_id: language_server_id.0 as u64,
1885                                        variant: Some(message),
1886                                    })
1887                                    .log_err();
1888                            }
1889                        });
1890                    }
1891                }
1892            }
1893
1894            flush_operations(
1895                &this,
1896                &mut operations_by_buffer_id,
1897                &mut needs_resync_with_host,
1898                is_local,
1899                &cx,
1900            )
1901            .await;
1902        }
1903
1904        None
1905    }
1906
1907    fn on_buffer_event(
1908        &mut self,
1909        buffer: ModelHandle<Buffer>,
1910        event: &BufferEvent,
1911        cx: &mut ModelContext<Self>,
1912    ) -> Option<()> {
1913        match event {
1914            BufferEvent::Operation(operation) => {
1915                self.buffer_ordered_messages_tx
1916                    .unbounded_send(BufferOrderedMessage::Operation {
1917                        buffer_id: buffer.read(cx).remote_id(),
1918                        operation: language::proto::serialize_operation(operation),
1919                    })
1920                    .ok();
1921            }
1922
1923            BufferEvent::Edited { .. } => {
1924                let buffer = buffer.read(cx);
1925                let file = File::from_dyn(buffer.file())?;
1926                let abs_path = file.as_local()?.abs_path(cx);
1927                let uri = lsp::Url::from_file_path(abs_path).unwrap();
1928                let next_snapshot = buffer.text_snapshot();
1929
1930                let language_servers: Vec<_> = self
1931                    .language_servers_for_buffer(buffer, cx)
1932                    .map(|i| i.1.clone())
1933                    .collect();
1934
1935                for language_server in language_servers {
1936                    let language_server = language_server.clone();
1937
1938                    let buffer_snapshots = self
1939                        .buffer_snapshots
1940                        .get_mut(&buffer.remote_id())
1941                        .and_then(|m| m.get_mut(&language_server.server_id()))?;
1942                    let previous_snapshot = buffer_snapshots.last()?;
1943                    let next_version = previous_snapshot.version + 1;
1944
1945                    let content_changes = buffer
1946                        .edits_since::<(PointUtf16, usize)>(previous_snapshot.snapshot.version())
1947                        .map(|edit| {
1948                            let edit_start = edit.new.start.0;
1949                            let edit_end = edit_start + (edit.old.end.0 - edit.old.start.0);
1950                            let new_text = next_snapshot
1951                                .text_for_range(edit.new.start.1..edit.new.end.1)
1952                                .collect();
1953                            lsp::TextDocumentContentChangeEvent {
1954                                range: Some(lsp::Range::new(
1955                                    point_to_lsp(edit_start),
1956                                    point_to_lsp(edit_end),
1957                                )),
1958                                range_length: None,
1959                                text: new_text,
1960                            }
1961                        })
1962                        .collect();
1963
1964                    buffer_snapshots.push(LspBufferSnapshot {
1965                        version: next_version,
1966                        snapshot: next_snapshot.clone(),
1967                    });
1968
1969                    language_server
1970                        .notify::<lsp::notification::DidChangeTextDocument>(
1971                            lsp::DidChangeTextDocumentParams {
1972                                text_document: lsp::VersionedTextDocumentIdentifier::new(
1973                                    uri.clone(),
1974                                    next_version,
1975                                ),
1976                                content_changes,
1977                            },
1978                        )
1979                        .log_err();
1980                }
1981            }
1982
1983            BufferEvent::Saved => {
1984                let file = File::from_dyn(buffer.read(cx).file())?;
1985                let worktree_id = file.worktree_id(cx);
1986                let abs_path = file.as_local()?.abs_path(cx);
1987                let text_document = lsp::TextDocumentIdentifier {
1988                    uri: lsp::Url::from_file_path(abs_path).unwrap(),
1989                };
1990
1991                for (_, _, server) in self.language_servers_for_worktree(worktree_id) {
1992                    server
1993                        .notify::<lsp::notification::DidSaveTextDocument>(
1994                            lsp::DidSaveTextDocumentParams {
1995                                text_document: text_document.clone(),
1996                                text: None,
1997                            },
1998                        )
1999                        .log_err();
2000                }
2001
2002                let language_server_ids = self.language_server_ids_for_buffer(buffer.read(cx), cx);
2003                for language_server_id in language_server_ids {
2004                    if let Some(LanguageServerState::Running {
2005                        adapter,
2006                        simulate_disk_based_diagnostics_completion,
2007                        ..
2008                    }) = self.language_servers.get_mut(&language_server_id)
2009                    {
2010                        // After saving a buffer using a language server that doesn't provide
2011                        // a disk-based progress token, kick off a timer that will reset every
2012                        // time the buffer is saved. If the timer eventually fires, simulate
2013                        // disk-based diagnostics being finished so that other pieces of UI
2014                        // (e.g., project diagnostics view, diagnostic status bar) can update.
2015                        // We don't emit an event right away because the language server might take
2016                        // some time to publish diagnostics.
2017                        if adapter.disk_based_diagnostics_progress_token.is_none() {
2018                            const DISK_BASED_DIAGNOSTICS_DEBOUNCE: Duration =
2019                                Duration::from_secs(1);
2020
2021                            let task = cx.spawn_weak(|this, mut cx| async move {
2022                                cx.background().timer(DISK_BASED_DIAGNOSTICS_DEBOUNCE).await;
2023                                if let Some(this) = this.upgrade(&cx) {
2024                                    this.update(&mut cx, |this, cx| {
2025                                        this.disk_based_diagnostics_finished(
2026                                            language_server_id,
2027                                            cx,
2028                                        );
2029                                        this.buffer_ordered_messages_tx
2030                                            .unbounded_send(
2031                                                BufferOrderedMessage::LanguageServerUpdate {
2032                                                    language_server_id,
2033                                                    message:proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(Default::default())
2034                                                },
2035                                            )
2036                                            .ok();
2037                                    });
2038                                }
2039                            });
2040                            *simulate_disk_based_diagnostics_completion = Some(task);
2041                        }
2042                    }
2043                }
2044            }
2045
2046            _ => {}
2047        }
2048
2049        None
2050    }
2051
2052    fn language_servers_for_worktree(
2053        &self,
2054        worktree_id: WorktreeId,
2055    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<Language>, &Arc<LanguageServer>)> {
2056        self.language_server_ids
2057            .iter()
2058            .filter_map(move |((language_server_worktree_id, _), id)| {
2059                if *language_server_worktree_id == worktree_id {
2060                    if let Some(LanguageServerState::Running {
2061                        adapter,
2062                        language,
2063                        server,
2064                        ..
2065                    }) = self.language_servers.get(id)
2066                    {
2067                        return Some((adapter, language, server));
2068                    }
2069                }
2070                None
2071            })
2072    }
2073
2074    fn maintain_buffer_languages(
2075        languages: &LanguageRegistry,
2076        cx: &mut ModelContext<Project>,
2077    ) -> Task<()> {
2078        let mut subscription = languages.subscribe();
2079        cx.spawn_weak(|project, mut cx| async move {
2080            while let Some(()) = subscription.next().await {
2081                if let Some(project) = project.upgrade(&cx) {
2082                    project.update(&mut cx, |project, cx| {
2083                        let mut plain_text_buffers = Vec::new();
2084                        let mut buffers_with_unknown_injections = Vec::new();
2085                        for buffer in project.opened_buffers.values() {
2086                            if let Some(handle) = buffer.upgrade(cx) {
2087                                let buffer = &handle.read(cx);
2088                                if buffer.language().is_none()
2089                                    || buffer.language() == Some(&*language::PLAIN_TEXT)
2090                                {
2091                                    plain_text_buffers.push(handle);
2092                                } else if buffer.contains_unknown_injections() {
2093                                    buffers_with_unknown_injections.push(handle);
2094                                }
2095                            }
2096                        }
2097
2098                        for buffer in plain_text_buffers {
2099                            project.detect_language_for_buffer(&buffer, cx);
2100                            project.register_buffer_with_language_servers(&buffer, cx);
2101                        }
2102
2103                        for buffer in buffers_with_unknown_injections {
2104                            buffer.update(cx, |buffer, cx| buffer.reparse(cx));
2105                        }
2106                    });
2107                }
2108            }
2109        })
2110    }
2111
2112    fn maintain_workspace_config(
2113        languages: Arc<LanguageRegistry>,
2114        cx: &mut ModelContext<Project>,
2115    ) -> Task<()> {
2116        let (mut settings_changed_tx, mut settings_changed_rx) = watch::channel();
2117        let _ = postage::stream::Stream::try_recv(&mut settings_changed_rx);
2118
2119        let settings_observation = cx.observe_global::<Settings, _>(move |_, _| {
2120            *settings_changed_tx.borrow_mut() = ();
2121        });
2122        cx.spawn_weak(|this, mut cx| async move {
2123            while let Some(_) = settings_changed_rx.next().await {
2124                let workspace_config = cx.update(|cx| languages.workspace_configuration(cx)).await;
2125                if let Some(this) = this.upgrade(&cx) {
2126                    this.read_with(&cx, |this, _| {
2127                        for server_state in this.language_servers.values() {
2128                            if let LanguageServerState::Running { server, .. } = server_state {
2129                                server
2130                                    .notify::<lsp::notification::DidChangeConfiguration>(
2131                                        lsp::DidChangeConfigurationParams {
2132                                            settings: workspace_config.clone(),
2133                                        },
2134                                    )
2135                                    .ok();
2136                            }
2137                        }
2138                    })
2139                } else {
2140                    break;
2141                }
2142            }
2143
2144            drop(settings_observation);
2145        })
2146    }
2147
2148    fn detect_language_for_buffer(
2149        &mut self,
2150        buffer_handle: &ModelHandle<Buffer>,
2151        cx: &mut ModelContext<Self>,
2152    ) -> Option<()> {
2153        // If the buffer has a language, set it and start the language server if we haven't already.
2154        let buffer = buffer_handle.read(cx);
2155        let full_path = buffer.file()?.full_path(cx);
2156        let content = buffer.as_rope();
2157        let new_language = self
2158            .languages
2159            .language_for_file(&full_path, Some(content))
2160            .now_or_never()?
2161            .ok()?;
2162        self.set_language_for_buffer(buffer_handle, new_language, cx);
2163        None
2164    }
2165
2166    pub fn set_language_for_buffer(
2167        &mut self,
2168        buffer: &ModelHandle<Buffer>,
2169        new_language: Arc<Language>,
2170        cx: &mut ModelContext<Self>,
2171    ) {
2172        buffer.update(cx, |buffer, cx| {
2173            if buffer.language().map_or(true, |old_language| {
2174                !Arc::ptr_eq(old_language, &new_language)
2175            }) {
2176                buffer.set_language(Some(new_language.clone()), cx);
2177            }
2178        });
2179
2180        if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
2181            if let Some(worktree) = file.worktree.read(cx).as_local() {
2182                let worktree_id = worktree.id();
2183                let worktree_abs_path = worktree.abs_path().clone();
2184                self.start_language_servers(worktree_id, worktree_abs_path, new_language, cx);
2185            }
2186        }
2187    }
2188
2189    fn start_language_servers(
2190        &mut self,
2191        worktree_id: WorktreeId,
2192        worktree_path: Arc<Path>,
2193        language: Arc<Language>,
2194        cx: &mut ModelContext<Self>,
2195    ) {
2196        if !cx
2197            .global::<Settings>()
2198            .enable_language_server(Some(&language.name()))
2199        {
2200            return;
2201        }
2202
2203        for adapter in language.lsp_adapters() {
2204            let key = (worktree_id, adapter.name.clone());
2205            if self.language_server_ids.contains_key(&key) {
2206                continue;
2207            }
2208
2209            let pending_server = match self.languages.start_language_server(
2210                language.clone(),
2211                adapter.clone(),
2212                worktree_path.clone(),
2213                self.client.http_client(),
2214                cx,
2215            ) {
2216                Some(pending_server) => pending_server,
2217                None => continue,
2218            };
2219
2220            let lsp = &cx.global::<Settings>().lsp.get(&adapter.name.0);
2221            let override_options = lsp.map(|s| s.initialization_options.clone()).flatten();
2222
2223            let mut initialization_options = adapter.initialization_options.clone();
2224            match (&mut initialization_options, override_options) {
2225                (Some(initialization_options), Some(override_options)) => {
2226                    merge_json_value_into(override_options, initialization_options);
2227                }
2228                (None, override_options) => initialization_options = override_options,
2229                _ => {}
2230            }
2231
2232            let server_id = pending_server.server_id;
2233            let state = self.setup_pending_language_server(
2234                initialization_options,
2235                pending_server,
2236                adapter.clone(),
2237                language.clone(),
2238                key.clone(),
2239                cx,
2240            );
2241            self.language_servers.insert(server_id, state);
2242            self.language_server_ids.insert(key.clone(), server_id);
2243        }
2244    }
2245
2246    fn setup_pending_language_server(
2247        &mut self,
2248        initialization_options: Option<serde_json::Value>,
2249        pending_server: PendingLanguageServer,
2250        adapter: Arc<CachedLspAdapter>,
2251        language: Arc<Language>,
2252        key: (WorktreeId, LanguageServerName),
2253        cx: &mut ModelContext<Project>,
2254    ) -> LanguageServerState {
2255        let server_id = pending_server.server_id;
2256        let languages = self.languages.clone();
2257
2258        LanguageServerState::Starting(cx.spawn_weak(|this, mut cx| async move {
2259            let workspace_config = cx.update(|cx| languages.workspace_configuration(cx)).await;
2260            let language_server = pending_server.task.await.log_err()?;
2261            let language_server = language_server
2262                .initialize(initialization_options)
2263                .await
2264                .log_err()?;
2265            let this = this.upgrade(&cx)?;
2266
2267            language_server
2268                .on_notification::<lsp::notification::PublishDiagnostics, _>({
2269                    let this = this.downgrade();
2270                    let adapter = adapter.clone();
2271                    move |mut params, cx| {
2272                        let this = this;
2273                        let adapter = adapter.clone();
2274                        cx.spawn(|mut cx| async move {
2275                            adapter.process_diagnostics(&mut params).await;
2276                            if let Some(this) = this.upgrade(&cx) {
2277                                this.update(&mut cx, |this, cx| {
2278                                    this.update_diagnostics(
2279                                        server_id,
2280                                        params,
2281                                        &adapter.disk_based_diagnostic_sources,
2282                                        cx,
2283                                    )
2284                                    .log_err();
2285                                });
2286                            }
2287                        })
2288                        .detach();
2289                    }
2290                })
2291                .detach();
2292
2293            language_server
2294                .on_request::<lsp::request::WorkspaceConfiguration, _, _>({
2295                    let languages = languages.clone();
2296                    move |params, mut cx| {
2297                        let languages = languages.clone();
2298                        async move {
2299                            let workspace_config =
2300                                cx.update(|cx| languages.workspace_configuration(cx)).await;
2301                            Ok(params
2302                                .items
2303                                .into_iter()
2304                                .map(|item| {
2305                                    if let Some(section) = &item.section {
2306                                        workspace_config
2307                                            .get(section)
2308                                            .cloned()
2309                                            .unwrap_or(serde_json::Value::Null)
2310                                    } else {
2311                                        workspace_config.clone()
2312                                    }
2313                                })
2314                                .collect())
2315                        }
2316                    }
2317                })
2318                .detach();
2319
2320            // Even though we don't have handling for these requests, respond to them to
2321            // avoid stalling any language server like `gopls` which waits for a response
2322            // to these requests when initializing.
2323            language_server
2324                .on_request::<lsp::request::WorkDoneProgressCreate, _, _>({
2325                    let this = this.downgrade();
2326                    move |params, mut cx| async move {
2327                        if let Some(this) = this.upgrade(&cx) {
2328                            this.update(&mut cx, |this, _| {
2329                                if let Some(status) =
2330                                    this.language_server_statuses.get_mut(&server_id)
2331                                {
2332                                    if let lsp::NumberOrString::String(token) = params.token {
2333                                        status.progress_tokens.insert(token);
2334                                    }
2335                                }
2336                            });
2337                        }
2338                        Ok(())
2339                    }
2340                })
2341                .detach();
2342            language_server
2343                .on_request::<lsp::request::RegisterCapability, _, _>({
2344                    let this = this.downgrade();
2345                    move |params, mut cx| async move {
2346                        let this = this
2347                            .upgrade(&cx)
2348                            .ok_or_else(|| anyhow!("project dropped"))?;
2349                        for reg in params.registrations {
2350                            if reg.method == "workspace/didChangeWatchedFiles" {
2351                                if let Some(options) = reg.register_options {
2352                                    let options = serde_json::from_value(options)?;
2353                                    this.update(&mut cx, |this, cx| {
2354                                        this.on_lsp_did_change_watched_files(
2355                                            server_id, options, cx,
2356                                        );
2357                                    });
2358                                }
2359                            }
2360                        }
2361                        Ok(())
2362                    }
2363                })
2364                .detach();
2365
2366            language_server
2367                .on_request::<lsp::request::ApplyWorkspaceEdit, _, _>({
2368                    let this = this.downgrade();
2369                    let adapter = adapter.clone();
2370                    let language_server = language_server.clone();
2371                    move |params, cx| {
2372                        Self::on_lsp_workspace_edit(
2373                            this,
2374                            params,
2375                            server_id,
2376                            adapter.clone(),
2377                            language_server.clone(),
2378                            cx,
2379                        )
2380                    }
2381                })
2382                .detach();
2383
2384            let disk_based_diagnostics_progress_token =
2385                adapter.disk_based_diagnostics_progress_token.clone();
2386
2387            language_server
2388                .on_notification::<lsp::notification::Progress, _>({
2389                    let this = this.downgrade();
2390                    move |params, mut cx| {
2391                        if let Some(this) = this.upgrade(&cx) {
2392                            this.update(&mut cx, |this, cx| {
2393                                this.on_lsp_progress(
2394                                    params,
2395                                    server_id,
2396                                    disk_based_diagnostics_progress_token.clone(),
2397                                    cx,
2398                                );
2399                            });
2400                        }
2401                    }
2402                })
2403                .detach();
2404
2405            language_server
2406                .notify::<lsp::notification::DidChangeConfiguration>(
2407                    lsp::DidChangeConfigurationParams {
2408                        settings: workspace_config,
2409                    },
2410                )
2411                .ok();
2412
2413            this.update(&mut cx, |this, cx| {
2414                // If the language server for this key doesn't match the server id, don't store the
2415                // server. Which will cause it to be dropped, killing the process
2416                if this
2417                    .language_server_ids
2418                    .get(&key)
2419                    .map(|id| id != &server_id)
2420                    .unwrap_or(false)
2421                {
2422                    return None;
2423                }
2424
2425                // Update language_servers collection with Running variant of LanguageServerState
2426                // indicating that the server is up and running and ready
2427                this.language_servers.insert(
2428                    server_id,
2429                    LanguageServerState::Running {
2430                        adapter: adapter.clone(),
2431                        language: language.clone(),
2432                        watched_paths: Default::default(),
2433                        server: language_server.clone(),
2434                        simulate_disk_based_diagnostics_completion: None,
2435                    },
2436                );
2437                this.language_server_statuses.insert(
2438                    server_id,
2439                    LanguageServerStatus {
2440                        name: language_server.name().to_string(),
2441                        pending_work: Default::default(),
2442                        has_pending_diagnostic_updates: false,
2443                        progress_tokens: Default::default(),
2444                    },
2445                );
2446
2447                if let Some(project_id) = this.remote_id() {
2448                    this.client
2449                        .send(proto::StartLanguageServer {
2450                            project_id,
2451                            server: Some(proto::LanguageServer {
2452                                id: server_id.0 as u64,
2453                                name: language_server.name().to_string(),
2454                            }),
2455                        })
2456                        .log_err();
2457                }
2458
2459                // Tell the language server about every open buffer in the worktree that matches the language.
2460                for buffer in this.opened_buffers.values() {
2461                    if let Some(buffer_handle) = buffer.upgrade(cx) {
2462                        let buffer = buffer_handle.read(cx);
2463                        let file = match File::from_dyn(buffer.file()) {
2464                            Some(file) => file,
2465                            None => continue,
2466                        };
2467                        let language = match buffer.language() {
2468                            Some(language) => language,
2469                            None => continue,
2470                        };
2471
2472                        if file.worktree.read(cx).id() != key.0
2473                            || !language.lsp_adapters().iter().any(|a| a.name == key.1)
2474                        {
2475                            continue;
2476                        }
2477
2478                        let file = file.as_local()?;
2479                        let versions = this
2480                            .buffer_snapshots
2481                            .entry(buffer.remote_id())
2482                            .or_default()
2483                            .entry(server_id)
2484                            .or_insert_with(|| {
2485                                vec![LspBufferSnapshot {
2486                                    version: 0,
2487                                    snapshot: buffer.text_snapshot(),
2488                                }]
2489                            });
2490
2491                        let snapshot = versions.last().unwrap();
2492                        let version = snapshot.version;
2493                        let initial_snapshot = &snapshot.snapshot;
2494                        let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
2495                        language_server
2496                            .notify::<lsp::notification::DidOpenTextDocument>(
2497                                lsp::DidOpenTextDocumentParams {
2498                                    text_document: lsp::TextDocumentItem::new(
2499                                        uri,
2500                                        adapter
2501                                            .language_ids
2502                                            .get(language.name().as_ref())
2503                                            .cloned()
2504                                            .unwrap_or_default(),
2505                                        version,
2506                                        initial_snapshot.text(),
2507                                    ),
2508                                },
2509                            )
2510                            .log_err()?;
2511                        buffer_handle.update(cx, |buffer, cx| {
2512                            buffer.set_completion_triggers(
2513                                language_server
2514                                    .capabilities()
2515                                    .completion_provider
2516                                    .as_ref()
2517                                    .and_then(|provider| provider.trigger_characters.clone())
2518                                    .unwrap_or_default(),
2519                                cx,
2520                            )
2521                        });
2522                    }
2523                }
2524
2525                cx.notify();
2526                Some(language_server)
2527            })
2528        }))
2529    }
2530
2531    // Returns a list of all of the worktrees which no longer have a language server and the root path
2532    // for the stopped server
2533    fn stop_language_server(
2534        &mut self,
2535        worktree_id: WorktreeId,
2536        adapter_name: LanguageServerName,
2537        cx: &mut ModelContext<Self>,
2538    ) -> Task<(Option<PathBuf>, Vec<WorktreeId>)> {
2539        let key = (worktree_id, adapter_name);
2540        if let Some(server_id) = self.language_server_ids.remove(&key) {
2541            // Remove other entries for this language server as well
2542            let mut orphaned_worktrees = vec![worktree_id];
2543            let other_keys = self.language_server_ids.keys().cloned().collect::<Vec<_>>();
2544            for other_key in other_keys {
2545                if self.language_server_ids.get(&other_key) == Some(&server_id) {
2546                    self.language_server_ids.remove(&other_key);
2547                    orphaned_worktrees.push(other_key.0);
2548                }
2549            }
2550
2551            self.language_server_statuses.remove(&server_id);
2552            cx.notify();
2553
2554            let server_state = self.language_servers.remove(&server_id);
2555            cx.spawn_weak(|this, mut cx| async move {
2556                let mut root_path = None;
2557
2558                let server = match server_state {
2559                    Some(LanguageServerState::Starting(started_language_server)) => {
2560                        started_language_server.await
2561                    }
2562                    Some(LanguageServerState::Running { server, .. }) => Some(server),
2563                    None => None,
2564                };
2565
2566                if let Some(server) = server {
2567                    root_path = Some(server.root_path().clone());
2568                    if let Some(shutdown) = server.shutdown() {
2569                        shutdown.await;
2570                    }
2571                }
2572
2573                if let Some(this) = this.upgrade(&cx) {
2574                    this.update(&mut cx, |this, cx| {
2575                        this.language_server_statuses.remove(&server_id);
2576                        cx.notify();
2577                    });
2578                }
2579
2580                (root_path, orphaned_worktrees)
2581            })
2582        } else {
2583            Task::ready((None, Vec::new()))
2584        }
2585    }
2586
2587    pub fn restart_language_servers_for_buffers(
2588        &mut self,
2589        buffers: impl IntoIterator<Item = ModelHandle<Buffer>>,
2590        cx: &mut ModelContext<Self>,
2591    ) -> Option<()> {
2592        let language_server_lookup_info: HashSet<(WorktreeId, Arc<Path>, Arc<Language>)> = buffers
2593            .into_iter()
2594            .filter_map(|buffer| {
2595                let buffer = buffer.read(cx);
2596                let file = File::from_dyn(buffer.file())?;
2597                let worktree = file.worktree.read(cx).as_local()?;
2598                let full_path = file.full_path(cx);
2599                let language = self
2600                    .languages
2601                    .language_for_file(&full_path, Some(buffer.as_rope()))
2602                    .now_or_never()?
2603                    .ok()?;
2604                Some((worktree.id(), worktree.abs_path().clone(), language))
2605            })
2606            .collect();
2607        for (worktree_id, worktree_abs_path, language) in language_server_lookup_info {
2608            self.restart_language_servers(worktree_id, worktree_abs_path, language, cx);
2609        }
2610
2611        None
2612    }
2613
2614    // TODO This will break in the case where the adapter's root paths and worktrees are not equal
2615    fn restart_language_servers(
2616        &mut self,
2617        worktree_id: WorktreeId,
2618        fallback_path: Arc<Path>,
2619        language: Arc<Language>,
2620        cx: &mut ModelContext<Self>,
2621    ) {
2622        let mut stops = Vec::new();
2623        for adapter in language.lsp_adapters() {
2624            stops.push(self.stop_language_server(worktree_id, adapter.name.clone(), cx));
2625        }
2626
2627        if stops.is_empty() {
2628            return;
2629        }
2630        let mut stops = stops.into_iter();
2631
2632        cx.spawn_weak(|this, mut cx| async move {
2633            let (original_root_path, mut orphaned_worktrees) = stops.next().unwrap().await;
2634            for stop in stops {
2635                let (_, worktrees) = stop.await;
2636                orphaned_worktrees.extend_from_slice(&worktrees);
2637            }
2638
2639            let this = match this.upgrade(&cx) {
2640                Some(this) => this,
2641                None => return,
2642            };
2643
2644            this.update(&mut cx, |this, cx| {
2645                // Attempt to restart using original server path. Fallback to passed in
2646                // path if we could not retrieve the root path
2647                let root_path = original_root_path
2648                    .map(|path_buf| Arc::from(path_buf.as_path()))
2649                    .unwrap_or(fallback_path);
2650
2651                this.start_language_servers(worktree_id, root_path, language.clone(), cx);
2652
2653                // Lookup new server ids and set them for each of the orphaned worktrees
2654                for adapter in language.lsp_adapters() {
2655                    if let Some(new_server_id) = this
2656                        .language_server_ids
2657                        .get(&(worktree_id, adapter.name.clone()))
2658                        .cloned()
2659                    {
2660                        for &orphaned_worktree in &orphaned_worktrees {
2661                            this.language_server_ids
2662                                .insert((orphaned_worktree, adapter.name.clone()), new_server_id);
2663                        }
2664                    }
2665                }
2666            });
2667        })
2668        .detach();
2669    }
2670
2671    fn on_lsp_progress(
2672        &mut self,
2673        progress: lsp::ProgressParams,
2674        language_server_id: LanguageServerId,
2675        disk_based_diagnostics_progress_token: Option<String>,
2676        cx: &mut ModelContext<Self>,
2677    ) {
2678        let token = match progress.token {
2679            lsp::NumberOrString::String(token) => token,
2680            lsp::NumberOrString::Number(token) => {
2681                log::info!("skipping numeric progress token {}", token);
2682                return;
2683            }
2684        };
2685        let lsp::ProgressParamsValue::WorkDone(progress) = progress.value;
2686        let language_server_status =
2687            if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2688                status
2689            } else {
2690                return;
2691            };
2692
2693        if !language_server_status.progress_tokens.contains(&token) {
2694            return;
2695        }
2696
2697        let is_disk_based_diagnostics_progress = disk_based_diagnostics_progress_token
2698            .as_ref()
2699            .map_or(false, |disk_based_token| {
2700                token.starts_with(disk_based_token)
2701            });
2702
2703        match progress {
2704            lsp::WorkDoneProgress::Begin(report) => {
2705                if is_disk_based_diagnostics_progress {
2706                    language_server_status.has_pending_diagnostic_updates = true;
2707                    self.disk_based_diagnostics_started(language_server_id, cx);
2708                    self.buffer_ordered_messages_tx
2709                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2710                            language_server_id,
2711                            message: proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(Default::default())
2712                        })
2713                        .ok();
2714                } else {
2715                    self.on_lsp_work_start(
2716                        language_server_id,
2717                        token.clone(),
2718                        LanguageServerProgress {
2719                            message: report.message.clone(),
2720                            percentage: report.percentage.map(|p| p as usize),
2721                            last_update_at: Instant::now(),
2722                        },
2723                        cx,
2724                    );
2725                    self.buffer_ordered_messages_tx
2726                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2727                            language_server_id,
2728                            message: proto::update_language_server::Variant::WorkStart(
2729                                proto::LspWorkStart {
2730                                    token,
2731                                    message: report.message,
2732                                    percentage: report.percentage.map(|p| p as u32),
2733                                },
2734                            ),
2735                        })
2736                        .ok();
2737                }
2738            }
2739            lsp::WorkDoneProgress::Report(report) => {
2740                if !is_disk_based_diagnostics_progress {
2741                    self.on_lsp_work_progress(
2742                        language_server_id,
2743                        token.clone(),
2744                        LanguageServerProgress {
2745                            message: report.message.clone(),
2746                            percentage: report.percentage.map(|p| p as usize),
2747                            last_update_at: Instant::now(),
2748                        },
2749                        cx,
2750                    );
2751                    self.buffer_ordered_messages_tx
2752                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2753                            language_server_id,
2754                            message: proto::update_language_server::Variant::WorkProgress(
2755                                proto::LspWorkProgress {
2756                                    token,
2757                                    message: report.message,
2758                                    percentage: report.percentage.map(|p| p as u32),
2759                                },
2760                            ),
2761                        })
2762                        .ok();
2763                }
2764            }
2765            lsp::WorkDoneProgress::End(_) => {
2766                language_server_status.progress_tokens.remove(&token);
2767
2768                if is_disk_based_diagnostics_progress {
2769                    language_server_status.has_pending_diagnostic_updates = false;
2770                    self.disk_based_diagnostics_finished(language_server_id, cx);
2771                    self.buffer_ordered_messages_tx
2772                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2773                            language_server_id,
2774                            message:
2775                                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
2776                                    Default::default(),
2777                                ),
2778                        })
2779                        .ok();
2780                } else {
2781                    self.on_lsp_work_end(language_server_id, token.clone(), cx);
2782                    self.buffer_ordered_messages_tx
2783                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
2784                            language_server_id,
2785                            message: proto::update_language_server::Variant::WorkEnd(
2786                                proto::LspWorkEnd { token },
2787                            ),
2788                        })
2789                        .ok();
2790                }
2791            }
2792        }
2793    }
2794
2795    fn on_lsp_work_start(
2796        &mut self,
2797        language_server_id: LanguageServerId,
2798        token: String,
2799        progress: LanguageServerProgress,
2800        cx: &mut ModelContext<Self>,
2801    ) {
2802        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2803            status.pending_work.insert(token, progress);
2804            cx.notify();
2805        }
2806    }
2807
2808    fn on_lsp_work_progress(
2809        &mut self,
2810        language_server_id: LanguageServerId,
2811        token: String,
2812        progress: LanguageServerProgress,
2813        cx: &mut ModelContext<Self>,
2814    ) {
2815        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2816            let entry = status
2817                .pending_work
2818                .entry(token)
2819                .or_insert(LanguageServerProgress {
2820                    message: Default::default(),
2821                    percentage: Default::default(),
2822                    last_update_at: progress.last_update_at,
2823                });
2824            if progress.message.is_some() {
2825                entry.message = progress.message;
2826            }
2827            if progress.percentage.is_some() {
2828                entry.percentage = progress.percentage;
2829            }
2830            entry.last_update_at = progress.last_update_at;
2831            cx.notify();
2832        }
2833    }
2834
2835    fn on_lsp_work_end(
2836        &mut self,
2837        language_server_id: LanguageServerId,
2838        token: String,
2839        cx: &mut ModelContext<Self>,
2840    ) {
2841        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
2842            status.pending_work.remove(&token);
2843            cx.notify();
2844        }
2845    }
2846
2847    fn on_lsp_did_change_watched_files(
2848        &mut self,
2849        language_server_id: LanguageServerId,
2850        params: DidChangeWatchedFilesRegistrationOptions,
2851        cx: &mut ModelContext<Self>,
2852    ) {
2853        if let Some(LanguageServerState::Running { watched_paths, .. }) =
2854            self.language_servers.get_mut(&language_server_id)
2855        {
2856            let mut builders = HashMap::default();
2857            for watcher in params.watchers {
2858                for worktree in &self.worktrees {
2859                    if let Some(worktree) = worktree.upgrade(cx) {
2860                        let worktree = worktree.read(cx);
2861                        if let Some(abs_path) = worktree.abs_path().to_str() {
2862                            if let Some(suffix) = watcher
2863                                .glob_pattern
2864                                .strip_prefix(abs_path)
2865                                .and_then(|s| s.strip_prefix(std::path::MAIN_SEPARATOR))
2866                            {
2867                                if let Some(glob) = Glob::new(suffix).log_err() {
2868                                    builders
2869                                        .entry(worktree.id())
2870                                        .or_insert_with(|| GlobSetBuilder::new())
2871                                        .add(glob);
2872                                }
2873                                break;
2874                            }
2875                        }
2876                    }
2877                }
2878            }
2879
2880            watched_paths.clear();
2881            for (worktree_id, builder) in builders {
2882                if let Ok(globset) = builder.build() {
2883                    watched_paths.insert(worktree_id, globset);
2884                }
2885            }
2886
2887            cx.notify();
2888        }
2889    }
2890
2891    async fn on_lsp_workspace_edit(
2892        this: WeakModelHandle<Self>,
2893        params: lsp::ApplyWorkspaceEditParams,
2894        server_id: LanguageServerId,
2895        adapter: Arc<CachedLspAdapter>,
2896        language_server: Arc<LanguageServer>,
2897        mut cx: AsyncAppContext,
2898    ) -> Result<lsp::ApplyWorkspaceEditResponse> {
2899        let this = this
2900            .upgrade(&cx)
2901            .ok_or_else(|| anyhow!("project project closed"))?;
2902        let transaction = Self::deserialize_workspace_edit(
2903            this.clone(),
2904            params.edit,
2905            true,
2906            adapter.clone(),
2907            language_server.clone(),
2908            &mut cx,
2909        )
2910        .await
2911        .log_err();
2912        this.update(&mut cx, |this, _| {
2913            if let Some(transaction) = transaction {
2914                this.last_workspace_edits_by_language_server
2915                    .insert(server_id, transaction);
2916            }
2917        });
2918        Ok(lsp::ApplyWorkspaceEditResponse {
2919            applied: true,
2920            failed_change: None,
2921            failure_reason: None,
2922        })
2923    }
2924
2925    pub fn language_server_statuses(
2926        &self,
2927    ) -> impl DoubleEndedIterator<Item = &LanguageServerStatus> {
2928        self.language_server_statuses.values()
2929    }
2930
2931    pub fn update_diagnostics(
2932        &mut self,
2933        language_server_id: LanguageServerId,
2934        mut params: lsp::PublishDiagnosticsParams,
2935        disk_based_sources: &[String],
2936        cx: &mut ModelContext<Self>,
2937    ) -> Result<()> {
2938        let abs_path = params
2939            .uri
2940            .to_file_path()
2941            .map_err(|_| anyhow!("URI is not a file"))?;
2942        let mut diagnostics = Vec::default();
2943        let mut primary_diagnostic_group_ids = HashMap::default();
2944        let mut sources_by_group_id = HashMap::default();
2945        let mut supporting_diagnostics = HashMap::default();
2946
2947        // Ensure that primary diagnostics are always the most severe
2948        params.diagnostics.sort_by_key(|item| item.severity);
2949
2950        for diagnostic in &params.diagnostics {
2951            let source = diagnostic.source.as_ref();
2952            let code = diagnostic.code.as_ref().map(|code| match code {
2953                lsp::NumberOrString::Number(code) => code.to_string(),
2954                lsp::NumberOrString::String(code) => code.clone(),
2955            });
2956            let range = range_from_lsp(diagnostic.range);
2957            let is_supporting = diagnostic
2958                .related_information
2959                .as_ref()
2960                .map_or(false, |infos| {
2961                    infos.iter().any(|info| {
2962                        primary_diagnostic_group_ids.contains_key(&(
2963                            source,
2964                            code.clone(),
2965                            range_from_lsp(info.location.range),
2966                        ))
2967                    })
2968                });
2969
2970            let is_unnecessary = diagnostic.tags.as_ref().map_or(false, |tags| {
2971                tags.iter().any(|tag| *tag == DiagnosticTag::UNNECESSARY)
2972            });
2973
2974            if is_supporting {
2975                supporting_diagnostics.insert(
2976                    (source, code.clone(), range),
2977                    (diagnostic.severity, is_unnecessary),
2978                );
2979            } else {
2980                let group_id = post_inc(&mut self.next_diagnostic_group_id);
2981                let is_disk_based =
2982                    source.map_or(false, |source| disk_based_sources.contains(source));
2983
2984                sources_by_group_id.insert(group_id, source);
2985                primary_diagnostic_group_ids
2986                    .insert((source, code.clone(), range.clone()), group_id);
2987
2988                diagnostics.push(DiagnosticEntry {
2989                    range,
2990                    diagnostic: Diagnostic {
2991                        source: diagnostic.source.clone(),
2992                        code: code.clone(),
2993                        severity: diagnostic.severity.unwrap_or(DiagnosticSeverity::ERROR),
2994                        message: diagnostic.message.clone(),
2995                        group_id,
2996                        is_primary: true,
2997                        is_valid: true,
2998                        is_disk_based,
2999                        is_unnecessary,
3000                    },
3001                });
3002                if let Some(infos) = &diagnostic.related_information {
3003                    for info in infos {
3004                        if info.location.uri == params.uri && !info.message.is_empty() {
3005                            let range = range_from_lsp(info.location.range);
3006                            diagnostics.push(DiagnosticEntry {
3007                                range,
3008                                diagnostic: Diagnostic {
3009                                    source: diagnostic.source.clone(),
3010                                    code: code.clone(),
3011                                    severity: DiagnosticSeverity::INFORMATION,
3012                                    message: info.message.clone(),
3013                                    group_id,
3014                                    is_primary: false,
3015                                    is_valid: true,
3016                                    is_disk_based,
3017                                    is_unnecessary: false,
3018                                },
3019                            });
3020                        }
3021                    }
3022                }
3023            }
3024        }
3025
3026        for entry in &mut diagnostics {
3027            let diagnostic = &mut entry.diagnostic;
3028            if !diagnostic.is_primary {
3029                let source = *sources_by_group_id.get(&diagnostic.group_id).unwrap();
3030                if let Some(&(severity, is_unnecessary)) = supporting_diagnostics.get(&(
3031                    source,
3032                    diagnostic.code.clone(),
3033                    entry.range.clone(),
3034                )) {
3035                    if let Some(severity) = severity {
3036                        diagnostic.severity = severity;
3037                    }
3038                    diagnostic.is_unnecessary = is_unnecessary;
3039                }
3040            }
3041        }
3042
3043        self.update_diagnostic_entries(
3044            language_server_id,
3045            abs_path,
3046            params.version,
3047            diagnostics,
3048            cx,
3049        )?;
3050        Ok(())
3051    }
3052
3053    pub fn update_diagnostic_entries(
3054        &mut self,
3055        server_id: LanguageServerId,
3056        abs_path: PathBuf,
3057        version: Option<i32>,
3058        diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3059        cx: &mut ModelContext<Project>,
3060    ) -> Result<(), anyhow::Error> {
3061        let (worktree, relative_path) = self
3062            .find_local_worktree(&abs_path, cx)
3063            .ok_or_else(|| anyhow!("no worktree found for diagnostics"))?;
3064
3065        let project_path = ProjectPath {
3066            worktree_id: worktree.read(cx).id(),
3067            path: relative_path.into(),
3068        };
3069
3070        if let Some(buffer) = self.get_open_buffer(&project_path, cx) {
3071            self.update_buffer_diagnostics(&buffer, server_id, version, diagnostics.clone(), cx)?;
3072        }
3073
3074        let updated = worktree.update(cx, |worktree, cx| {
3075            worktree
3076                .as_local_mut()
3077                .ok_or_else(|| anyhow!("not a local worktree"))?
3078                .update_diagnostics(server_id, project_path.path.clone(), diagnostics, cx)
3079        })?;
3080        if updated {
3081            cx.emit(Event::DiagnosticsUpdated {
3082                language_server_id: server_id,
3083                path: project_path,
3084            });
3085        }
3086        Ok(())
3087    }
3088
3089    fn update_buffer_diagnostics(
3090        &mut self,
3091        buffer: &ModelHandle<Buffer>,
3092        server_id: LanguageServerId,
3093        version: Option<i32>,
3094        mut diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3095        cx: &mut ModelContext<Self>,
3096    ) -> Result<()> {
3097        fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
3098            Ordering::Equal
3099                .then_with(|| b.is_primary.cmp(&a.is_primary))
3100                .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
3101                .then_with(|| a.severity.cmp(&b.severity))
3102                .then_with(|| a.message.cmp(&b.message))
3103        }
3104
3105        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx)?;
3106
3107        diagnostics.sort_unstable_by(|a, b| {
3108            Ordering::Equal
3109                .then_with(|| a.range.start.cmp(&b.range.start))
3110                .then_with(|| b.range.end.cmp(&a.range.end))
3111                .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
3112        });
3113
3114        let mut sanitized_diagnostics = Vec::new();
3115        let edits_since_save = Patch::new(
3116            snapshot
3117                .edits_since::<Unclipped<PointUtf16>>(buffer.read(cx).saved_version())
3118                .collect(),
3119        );
3120        for entry in diagnostics {
3121            let start;
3122            let end;
3123            if entry.diagnostic.is_disk_based {
3124                // Some diagnostics are based on files on disk instead of buffers'
3125                // current contents. Adjust these diagnostics' ranges to reflect
3126                // any unsaved edits.
3127                start = edits_since_save.old_to_new(entry.range.start);
3128                end = edits_since_save.old_to_new(entry.range.end);
3129            } else {
3130                start = entry.range.start;
3131                end = entry.range.end;
3132            }
3133
3134            let mut range = snapshot.clip_point_utf16(start, Bias::Left)
3135                ..snapshot.clip_point_utf16(end, Bias::Right);
3136
3137            // Expand empty ranges by one codepoint
3138            if range.start == range.end {
3139                // This will be go to the next boundary when being clipped
3140                range.end.column += 1;
3141                range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Right);
3142                if range.start == range.end && range.end.column > 0 {
3143                    range.start.column -= 1;
3144                    range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Left);
3145                }
3146            }
3147
3148            sanitized_diagnostics.push(DiagnosticEntry {
3149                range,
3150                diagnostic: entry.diagnostic,
3151            });
3152        }
3153        drop(edits_since_save);
3154
3155        let set = DiagnosticSet::new(sanitized_diagnostics, &snapshot);
3156        buffer.update(cx, |buffer, cx| {
3157            buffer.update_diagnostics(server_id, set, cx)
3158        });
3159        Ok(())
3160    }
3161
3162    pub fn reload_buffers(
3163        &self,
3164        buffers: HashSet<ModelHandle<Buffer>>,
3165        push_to_history: bool,
3166        cx: &mut ModelContext<Self>,
3167    ) -> Task<Result<ProjectTransaction>> {
3168        let mut local_buffers = Vec::new();
3169        let mut remote_buffers = None;
3170        for buffer_handle in buffers {
3171            let buffer = buffer_handle.read(cx);
3172            if buffer.is_dirty() {
3173                if let Some(file) = File::from_dyn(buffer.file()) {
3174                    if file.is_local() {
3175                        local_buffers.push(buffer_handle);
3176                    } else {
3177                        remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
3178                    }
3179                }
3180            }
3181        }
3182
3183        let remote_buffers = self.remote_id().zip(remote_buffers);
3184        let client = self.client.clone();
3185
3186        cx.spawn(|this, mut cx| async move {
3187            let mut project_transaction = ProjectTransaction::default();
3188
3189            if let Some((project_id, remote_buffers)) = remote_buffers {
3190                let response = client
3191                    .request(proto::ReloadBuffers {
3192                        project_id,
3193                        buffer_ids: remote_buffers
3194                            .iter()
3195                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
3196                            .collect(),
3197                    })
3198                    .await?
3199                    .transaction
3200                    .ok_or_else(|| anyhow!("missing transaction"))?;
3201                project_transaction = this
3202                    .update(&mut cx, |this, cx| {
3203                        this.deserialize_project_transaction(response, push_to_history, cx)
3204                    })
3205                    .await?;
3206            }
3207
3208            for buffer in local_buffers {
3209                let transaction = buffer
3210                    .update(&mut cx, |buffer, cx| buffer.reload(cx))
3211                    .await?;
3212                buffer.update(&mut cx, |buffer, cx| {
3213                    if let Some(transaction) = transaction {
3214                        if !push_to_history {
3215                            buffer.forget_transaction(transaction.id);
3216                        }
3217                        project_transaction.0.insert(cx.handle(), transaction);
3218                    }
3219                });
3220            }
3221
3222            Ok(project_transaction)
3223        })
3224    }
3225
3226    pub fn format(
3227        &self,
3228        buffers: HashSet<ModelHandle<Buffer>>,
3229        push_to_history: bool,
3230        trigger: FormatTrigger,
3231        cx: &mut ModelContext<Project>,
3232    ) -> Task<Result<ProjectTransaction>> {
3233        if self.is_local() {
3234            let mut buffers_with_paths_and_servers = buffers
3235                .into_iter()
3236                .filter_map(|buffer_handle| {
3237                    let buffer = buffer_handle.read(cx);
3238                    let file = File::from_dyn(buffer.file())?;
3239                    let buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3240                    let server = self
3241                        .primary_language_servers_for_buffer(buffer, cx)
3242                        .map(|s| s.1.clone());
3243                    Some((buffer_handle, buffer_abs_path, server))
3244                })
3245                .collect::<Vec<_>>();
3246
3247            cx.spawn(|this, mut cx| async move {
3248                // Do not allow multiple concurrent formatting requests for the
3249                // same buffer.
3250                this.update(&mut cx, |this, cx| {
3251                    buffers_with_paths_and_servers.retain(|(buffer, _, _)| {
3252                        this.buffers_being_formatted
3253                            .insert(buffer.read(cx).remote_id())
3254                    });
3255                });
3256
3257                let _cleanup = defer({
3258                    let this = this.clone();
3259                    let mut cx = cx.clone();
3260                    let buffers = &buffers_with_paths_and_servers;
3261                    move || {
3262                        this.update(&mut cx, |this, cx| {
3263                            for (buffer, _, _) in buffers {
3264                                this.buffers_being_formatted
3265                                    .remove(&buffer.read(cx).remote_id());
3266                            }
3267                        });
3268                    }
3269                });
3270
3271                let mut project_transaction = ProjectTransaction::default();
3272                for (buffer, buffer_abs_path, language_server) in &buffers_with_paths_and_servers {
3273                    let (
3274                        format_on_save,
3275                        remove_trailing_whitespace,
3276                        ensure_final_newline,
3277                        formatter,
3278                        tab_size,
3279                    ) = buffer.read_with(&cx, |buffer, cx| {
3280                        let settings = cx.global::<Settings>();
3281                        let language_name = buffer.language().map(|language| language.name());
3282                        (
3283                            settings.format_on_save(language_name.as_deref()),
3284                            settings.remove_trailing_whitespace_on_save(language_name.as_deref()),
3285                            settings.ensure_final_newline_on_save(language_name.as_deref()),
3286                            settings.formatter(language_name.as_deref()),
3287                            settings.tab_size(language_name.as_deref()),
3288                        )
3289                    });
3290
3291                    // First, format buffer's whitespace according to the settings.
3292                    let trailing_whitespace_diff = if remove_trailing_whitespace {
3293                        Some(
3294                            buffer
3295                                .read_with(&cx, |b, cx| b.remove_trailing_whitespace(cx))
3296                                .await,
3297                        )
3298                    } else {
3299                        None
3300                    };
3301                    let whitespace_transaction_id = buffer.update(&mut cx, |buffer, cx| {
3302                        buffer.finalize_last_transaction();
3303                        buffer.start_transaction();
3304                        if let Some(diff) = trailing_whitespace_diff {
3305                            buffer.apply_diff(diff, cx);
3306                        }
3307                        if ensure_final_newline {
3308                            buffer.ensure_final_newline(cx);
3309                        }
3310                        buffer.end_transaction(cx)
3311                    });
3312
3313                    // Currently, formatting operations are represented differently depending on
3314                    // whether they come from a language server or an external command.
3315                    enum FormatOperation {
3316                        Lsp(Vec<(Range<Anchor>, String)>),
3317                        External(Diff),
3318                    }
3319
3320                    // Apply language-specific formatting using either a language server
3321                    // or external command.
3322                    let mut format_operation = None;
3323                    match (formatter, format_on_save) {
3324                        (_, FormatOnSave::Off) if trigger == FormatTrigger::Save => {}
3325
3326                        (Formatter::LanguageServer, FormatOnSave::On | FormatOnSave::Off)
3327                        | (_, FormatOnSave::LanguageServer) => {
3328                            if let Some((language_server, buffer_abs_path)) =
3329                                language_server.as_ref().zip(buffer_abs_path.as_ref())
3330                            {
3331                                format_operation = Some(FormatOperation::Lsp(
3332                                    Self::format_via_lsp(
3333                                        &this,
3334                                        &buffer,
3335                                        buffer_abs_path,
3336                                        &language_server,
3337                                        tab_size,
3338                                        &mut cx,
3339                                    )
3340                                    .await
3341                                    .context("failed to format via language server")?,
3342                                ));
3343                            }
3344                        }
3345
3346                        (
3347                            Formatter::External { command, arguments },
3348                            FormatOnSave::On | FormatOnSave::Off,
3349                        )
3350                        | (_, FormatOnSave::External { command, arguments }) => {
3351                            if let Some(buffer_abs_path) = buffer_abs_path {
3352                                format_operation = Self::format_via_external_command(
3353                                    &buffer,
3354                                    &buffer_abs_path,
3355                                    &command,
3356                                    &arguments,
3357                                    &mut cx,
3358                                )
3359                                .await
3360                                .context(format!(
3361                                    "failed to format via external command {:?}",
3362                                    command
3363                                ))?
3364                                .map(FormatOperation::External);
3365                            }
3366                        }
3367                    };
3368
3369                    buffer.update(&mut cx, |b, cx| {
3370                        // If the buffer had its whitespace formatted and was edited while the language-specific
3371                        // formatting was being computed, avoid applying the language-specific formatting, because
3372                        // it can't be grouped with the whitespace formatting in the undo history.
3373                        if let Some(transaction_id) = whitespace_transaction_id {
3374                            if b.peek_undo_stack()
3375                                .map_or(true, |e| e.transaction_id() != transaction_id)
3376                            {
3377                                format_operation.take();
3378                            }
3379                        }
3380
3381                        // Apply any language-specific formatting, and group the two formatting operations
3382                        // in the buffer's undo history.
3383                        if let Some(operation) = format_operation {
3384                            match operation {
3385                                FormatOperation::Lsp(edits) => {
3386                                    b.edit(edits, None, cx);
3387                                }
3388                                FormatOperation::External(diff) => {
3389                                    b.apply_diff(diff, cx);
3390                                }
3391                            }
3392
3393                            if let Some(transaction_id) = whitespace_transaction_id {
3394                                b.group_until_transaction(transaction_id);
3395                            }
3396                        }
3397
3398                        if let Some(transaction) = b.finalize_last_transaction().cloned() {
3399                            if !push_to_history {
3400                                b.forget_transaction(transaction.id);
3401                            }
3402                            project_transaction.0.insert(buffer.clone(), transaction);
3403                        }
3404                    });
3405                }
3406
3407                Ok(project_transaction)
3408            })
3409        } else {
3410            let remote_id = self.remote_id();
3411            let client = self.client.clone();
3412            cx.spawn(|this, mut cx| async move {
3413                let mut project_transaction = ProjectTransaction::default();
3414                if let Some(project_id) = remote_id {
3415                    let response = client
3416                        .request(proto::FormatBuffers {
3417                            project_id,
3418                            trigger: trigger as i32,
3419                            buffer_ids: buffers
3420                                .iter()
3421                                .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
3422                                .collect(),
3423                        })
3424                        .await?
3425                        .transaction
3426                        .ok_or_else(|| anyhow!("missing transaction"))?;
3427                    project_transaction = this
3428                        .update(&mut cx, |this, cx| {
3429                            this.deserialize_project_transaction(response, push_to_history, cx)
3430                        })
3431                        .await?;
3432                }
3433                Ok(project_transaction)
3434            })
3435        }
3436    }
3437
3438    async fn format_via_lsp(
3439        this: &ModelHandle<Self>,
3440        buffer: &ModelHandle<Buffer>,
3441        abs_path: &Path,
3442        language_server: &Arc<LanguageServer>,
3443        tab_size: NonZeroU32,
3444        cx: &mut AsyncAppContext,
3445    ) -> Result<Vec<(Range<Anchor>, String)>> {
3446        let text_document =
3447            lsp::TextDocumentIdentifier::new(lsp::Url::from_file_path(abs_path).unwrap());
3448        let capabilities = &language_server.capabilities();
3449        let lsp_edits = if capabilities
3450            .document_formatting_provider
3451            .as_ref()
3452            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
3453        {
3454            language_server
3455                .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
3456                    text_document,
3457                    options: lsp::FormattingOptions {
3458                        tab_size: tab_size.into(),
3459                        insert_spaces: true,
3460                        insert_final_newline: Some(true),
3461                        ..Default::default()
3462                    },
3463                    work_done_progress_params: Default::default(),
3464                })
3465                .await?
3466        } else if capabilities
3467            .document_range_formatting_provider
3468            .as_ref()
3469            .map_or(false, |provider| *provider != lsp::OneOf::Left(false))
3470        {
3471            let buffer_start = lsp::Position::new(0, 0);
3472            let buffer_end =
3473                buffer.read_with(cx, |buffer, _| point_to_lsp(buffer.max_point_utf16()));
3474            language_server
3475                .request::<lsp::request::RangeFormatting>(lsp::DocumentRangeFormattingParams {
3476                    text_document,
3477                    range: lsp::Range::new(buffer_start, buffer_end),
3478                    options: lsp::FormattingOptions {
3479                        tab_size: tab_size.into(),
3480                        insert_spaces: true,
3481                        insert_final_newline: Some(true),
3482                        ..Default::default()
3483                    },
3484                    work_done_progress_params: Default::default(),
3485                })
3486                .await?
3487        } else {
3488            None
3489        };
3490
3491        if let Some(lsp_edits) = lsp_edits {
3492            this.update(cx, |this, cx| {
3493                this.edits_from_lsp(buffer, lsp_edits, language_server.server_id(), None, cx)
3494            })
3495            .await
3496        } else {
3497            Ok(Default::default())
3498        }
3499    }
3500
3501    async fn format_via_external_command(
3502        buffer: &ModelHandle<Buffer>,
3503        buffer_abs_path: &Path,
3504        command: &str,
3505        arguments: &[String],
3506        cx: &mut AsyncAppContext,
3507    ) -> Result<Option<Diff>> {
3508        let working_dir_path = buffer.read_with(cx, |buffer, cx| {
3509            let file = File::from_dyn(buffer.file())?;
3510            let worktree = file.worktree.read(cx).as_local()?;
3511            let mut worktree_path = worktree.abs_path().to_path_buf();
3512            if worktree.root_entry()?.is_file() {
3513                worktree_path.pop();
3514            }
3515            Some(worktree_path)
3516        });
3517
3518        if let Some(working_dir_path) = working_dir_path {
3519            let mut child =
3520                smol::process::Command::new(command)
3521                    .args(arguments.iter().map(|arg| {
3522                        arg.replace("{buffer_path}", &buffer_abs_path.to_string_lossy())
3523                    }))
3524                    .current_dir(&working_dir_path)
3525                    .stdin(smol::process::Stdio::piped())
3526                    .stdout(smol::process::Stdio::piped())
3527                    .stderr(smol::process::Stdio::piped())
3528                    .spawn()?;
3529            let stdin = child
3530                .stdin
3531                .as_mut()
3532                .ok_or_else(|| anyhow!("failed to acquire stdin"))?;
3533            let text = buffer.read_with(cx, |buffer, _| buffer.as_rope().clone());
3534            for chunk in text.chunks() {
3535                stdin.write_all(chunk.as_bytes()).await?;
3536            }
3537            stdin.flush().await?;
3538
3539            let output = child.output().await?;
3540            if !output.status.success() {
3541                return Err(anyhow!(
3542                    "command failed with exit code {:?}:\nstdout: {}\nstderr: {}",
3543                    output.status.code(),
3544                    String::from_utf8_lossy(&output.stdout),
3545                    String::from_utf8_lossy(&output.stderr),
3546                ));
3547            }
3548
3549            let stdout = String::from_utf8(output.stdout)?;
3550            Ok(Some(
3551                buffer
3552                    .read_with(cx, |buffer, cx| buffer.diff(stdout, cx))
3553                    .await,
3554            ))
3555        } else {
3556            Ok(None)
3557        }
3558    }
3559
3560    pub fn definition<T: ToPointUtf16>(
3561        &self,
3562        buffer: &ModelHandle<Buffer>,
3563        position: T,
3564        cx: &mut ModelContext<Self>,
3565    ) -> Task<Result<Vec<LocationLink>>> {
3566        let position = position.to_point_utf16(buffer.read(cx));
3567        self.request_lsp(buffer.clone(), GetDefinition { position }, cx)
3568    }
3569
3570    pub fn type_definition<T: ToPointUtf16>(
3571        &self,
3572        buffer: &ModelHandle<Buffer>,
3573        position: T,
3574        cx: &mut ModelContext<Self>,
3575    ) -> Task<Result<Vec<LocationLink>>> {
3576        let position = position.to_point_utf16(buffer.read(cx));
3577        self.request_lsp(buffer.clone(), GetTypeDefinition { position }, cx)
3578    }
3579
3580    pub fn references<T: ToPointUtf16>(
3581        &self,
3582        buffer: &ModelHandle<Buffer>,
3583        position: T,
3584        cx: &mut ModelContext<Self>,
3585    ) -> Task<Result<Vec<Location>>> {
3586        let position = position.to_point_utf16(buffer.read(cx));
3587        self.request_lsp(buffer.clone(), GetReferences { position }, cx)
3588    }
3589
3590    pub fn document_highlights<T: ToPointUtf16>(
3591        &self,
3592        buffer: &ModelHandle<Buffer>,
3593        position: T,
3594        cx: &mut ModelContext<Self>,
3595    ) -> Task<Result<Vec<DocumentHighlight>>> {
3596        let position = position.to_point_utf16(buffer.read(cx));
3597        self.request_lsp(buffer.clone(), GetDocumentHighlights { position }, cx)
3598    }
3599
3600    pub fn symbols(&self, query: &str, cx: &mut ModelContext<Self>) -> Task<Result<Vec<Symbol>>> {
3601        if self.is_local() {
3602            let mut requests = Vec::new();
3603            for ((worktree_id, _), server_id) in self.language_server_ids.iter() {
3604                let worktree_id = *worktree_id;
3605                if let Some(worktree) = self
3606                    .worktree_for_id(worktree_id, cx)
3607                    .and_then(|worktree| worktree.read(cx).as_local())
3608                {
3609                    if let Some(LanguageServerState::Running {
3610                        adapter,
3611                        language,
3612                        server,
3613                        ..
3614                    }) = self.language_servers.get(server_id)
3615                    {
3616                        let adapter = adapter.clone();
3617                        let language = language.clone();
3618                        let worktree_abs_path = worktree.abs_path().clone();
3619                        requests.push(
3620                            server
3621                                .request::<lsp::request::WorkspaceSymbol>(
3622                                    lsp::WorkspaceSymbolParams {
3623                                        query: query.to_string(),
3624                                        ..Default::default()
3625                                    },
3626                                )
3627                                .log_err()
3628                                .map(move |response| {
3629                                    (
3630                                        adapter,
3631                                        language,
3632                                        worktree_id,
3633                                        worktree_abs_path,
3634                                        response.unwrap_or_default(),
3635                                    )
3636                                }),
3637                        );
3638                    }
3639                }
3640            }
3641
3642            cx.spawn_weak(|this, cx| async move {
3643                let responses = futures::future::join_all(requests).await;
3644                let this = if let Some(this) = this.upgrade(&cx) {
3645                    this
3646                } else {
3647                    return Ok(Default::default());
3648                };
3649                let symbols = this.read_with(&cx, |this, cx| {
3650                    let mut symbols = Vec::new();
3651                    for (
3652                        adapter,
3653                        adapter_language,
3654                        source_worktree_id,
3655                        worktree_abs_path,
3656                        response,
3657                    ) in responses
3658                    {
3659                        symbols.extend(response.into_iter().flatten().filter_map(|lsp_symbol| {
3660                            let abs_path = lsp_symbol.location.uri.to_file_path().ok()?;
3661                            let mut worktree_id = source_worktree_id;
3662                            let path;
3663                            if let Some((worktree, rel_path)) =
3664                                this.find_local_worktree(&abs_path, cx)
3665                            {
3666                                worktree_id = worktree.read(cx).id();
3667                                path = rel_path;
3668                            } else {
3669                                path = relativize_path(&worktree_abs_path, &abs_path);
3670                            }
3671
3672                            let project_path = ProjectPath {
3673                                worktree_id,
3674                                path: path.into(),
3675                            };
3676                            let signature = this.symbol_signature(&project_path);
3677                            let adapter_language = adapter_language.clone();
3678                            let language = this
3679                                .languages
3680                                .language_for_file(&project_path.path, None)
3681                                .unwrap_or_else(move |_| adapter_language);
3682                            let language_server_name = adapter.name.clone();
3683                            Some(async move {
3684                                let language = language.await;
3685                                let label = language
3686                                    .label_for_symbol(&lsp_symbol.name, lsp_symbol.kind)
3687                                    .await;
3688
3689                                Symbol {
3690                                    language_server_name,
3691                                    source_worktree_id,
3692                                    path: project_path,
3693                                    label: label.unwrap_or_else(|| {
3694                                        CodeLabel::plain(lsp_symbol.name.clone(), None)
3695                                    }),
3696                                    kind: lsp_symbol.kind,
3697                                    name: lsp_symbol.name,
3698                                    range: range_from_lsp(lsp_symbol.location.range),
3699                                    signature,
3700                                }
3701                            })
3702                        }));
3703                    }
3704                    symbols
3705                });
3706                Ok(futures::future::join_all(symbols).await)
3707            })
3708        } else if let Some(project_id) = self.remote_id() {
3709            let request = self.client.request(proto::GetProjectSymbols {
3710                project_id,
3711                query: query.to_string(),
3712            });
3713            cx.spawn_weak(|this, cx| async move {
3714                let response = request.await?;
3715                let mut symbols = Vec::new();
3716                if let Some(this) = this.upgrade(&cx) {
3717                    let new_symbols = this.read_with(&cx, |this, _| {
3718                        response
3719                            .symbols
3720                            .into_iter()
3721                            .map(|symbol| this.deserialize_symbol(symbol))
3722                            .collect::<Vec<_>>()
3723                    });
3724                    symbols = futures::future::join_all(new_symbols)
3725                        .await
3726                        .into_iter()
3727                        .filter_map(|symbol| symbol.log_err())
3728                        .collect::<Vec<_>>();
3729                }
3730                Ok(symbols)
3731            })
3732        } else {
3733            Task::ready(Ok(Default::default()))
3734        }
3735    }
3736
3737    pub fn open_buffer_for_symbol(
3738        &mut self,
3739        symbol: &Symbol,
3740        cx: &mut ModelContext<Self>,
3741    ) -> Task<Result<ModelHandle<Buffer>>> {
3742        if self.is_local() {
3743            let language_server_id = if let Some(id) = self.language_server_ids.get(&(
3744                symbol.source_worktree_id,
3745                symbol.language_server_name.clone(),
3746            )) {
3747                *id
3748            } else {
3749                return Task::ready(Err(anyhow!(
3750                    "language server for worktree and language not found"
3751                )));
3752            };
3753
3754            let worktree_abs_path = if let Some(worktree_abs_path) = self
3755                .worktree_for_id(symbol.path.worktree_id, cx)
3756                .and_then(|worktree| worktree.read(cx).as_local())
3757                .map(|local_worktree| local_worktree.abs_path())
3758            {
3759                worktree_abs_path
3760            } else {
3761                return Task::ready(Err(anyhow!("worktree not found for symbol")));
3762            };
3763            let symbol_abs_path = worktree_abs_path.join(&symbol.path.path);
3764            let symbol_uri = if let Ok(uri) = lsp::Url::from_file_path(symbol_abs_path) {
3765                uri
3766            } else {
3767                return Task::ready(Err(anyhow!("invalid symbol path")));
3768            };
3769
3770            self.open_local_buffer_via_lsp(
3771                symbol_uri,
3772                language_server_id,
3773                symbol.language_server_name.clone(),
3774                cx,
3775            )
3776        } else if let Some(project_id) = self.remote_id() {
3777            let request = self.client.request(proto::OpenBufferForSymbol {
3778                project_id,
3779                symbol: Some(serialize_symbol(symbol)),
3780            });
3781            cx.spawn(|this, mut cx| async move {
3782                let response = request.await?;
3783                this.update(&mut cx, |this, cx| {
3784                    this.wait_for_remote_buffer(response.buffer_id, cx)
3785                })
3786                .await
3787            })
3788        } else {
3789            Task::ready(Err(anyhow!("project does not have a remote id")))
3790        }
3791    }
3792
3793    pub fn hover<T: ToPointUtf16>(
3794        &self,
3795        buffer: &ModelHandle<Buffer>,
3796        position: T,
3797        cx: &mut ModelContext<Self>,
3798    ) -> Task<Result<Option<Hover>>> {
3799        let position = position.to_point_utf16(buffer.read(cx));
3800        self.request_lsp(buffer.clone(), GetHover { position }, cx)
3801    }
3802
3803    pub fn completions<T: ToPointUtf16>(
3804        &self,
3805        buffer: &ModelHandle<Buffer>,
3806        position: T,
3807        cx: &mut ModelContext<Self>,
3808    ) -> Task<Result<Vec<Completion>>> {
3809        let position = position.to_point_utf16(buffer.read(cx));
3810        self.request_lsp(buffer.clone(), GetCompletions { position }, cx)
3811    }
3812
3813    pub fn apply_additional_edits_for_completion(
3814        &self,
3815        buffer_handle: ModelHandle<Buffer>,
3816        completion: Completion,
3817        push_to_history: bool,
3818        cx: &mut ModelContext<Self>,
3819    ) -> Task<Result<Option<Transaction>>> {
3820        let buffer = buffer_handle.read(cx);
3821        let buffer_id = buffer.remote_id();
3822
3823        if self.is_local() {
3824            let lang_server = match self.primary_language_servers_for_buffer(buffer, cx) {
3825                Some((_, server)) => server.clone(),
3826                _ => return Task::ready(Ok(Default::default())),
3827            };
3828
3829            cx.spawn(|this, mut cx| async move {
3830                let resolved_completion = lang_server
3831                    .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
3832                    .await?;
3833
3834                if let Some(edits) = resolved_completion.additional_text_edits {
3835                    let edits = this
3836                        .update(&mut cx, |this, cx| {
3837                            this.edits_from_lsp(
3838                                &buffer_handle,
3839                                edits,
3840                                lang_server.server_id(),
3841                                None,
3842                                cx,
3843                            )
3844                        })
3845                        .await?;
3846
3847                    buffer_handle.update(&mut cx, |buffer, cx| {
3848                        buffer.finalize_last_transaction();
3849                        buffer.start_transaction();
3850
3851                        for (range, text) in edits {
3852                            let primary = &completion.old_range;
3853                            let start_within = primary.start.cmp(&range.start, buffer).is_le()
3854                                && primary.end.cmp(&range.start, buffer).is_ge();
3855                            let end_within = range.start.cmp(&primary.end, buffer).is_le()
3856                                && range.end.cmp(&primary.end, buffer).is_ge();
3857
3858                            //Skip addtional edits which overlap with the primary completion edit
3859                            //https://github.com/zed-industries/zed/pull/1871
3860                            if !start_within && !end_within {
3861                                buffer.edit([(range, text)], None, cx);
3862                            }
3863                        }
3864
3865                        let transaction = if buffer.end_transaction(cx).is_some() {
3866                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
3867                            if !push_to_history {
3868                                buffer.forget_transaction(transaction.id);
3869                            }
3870                            Some(transaction)
3871                        } else {
3872                            None
3873                        };
3874                        Ok(transaction)
3875                    })
3876                } else {
3877                    Ok(None)
3878                }
3879            })
3880        } else if let Some(project_id) = self.remote_id() {
3881            let client = self.client.clone();
3882            cx.spawn(|_, mut cx| async move {
3883                let response = client
3884                    .request(proto::ApplyCompletionAdditionalEdits {
3885                        project_id,
3886                        buffer_id,
3887                        completion: Some(language::proto::serialize_completion(&completion)),
3888                    })
3889                    .await?;
3890
3891                if let Some(transaction) = response.transaction {
3892                    let transaction = language::proto::deserialize_transaction(transaction)?;
3893                    buffer_handle
3894                        .update(&mut cx, |buffer, _| {
3895                            buffer.wait_for_edits(transaction.edit_ids.iter().copied())
3896                        })
3897                        .await?;
3898                    if push_to_history {
3899                        buffer_handle.update(&mut cx, |buffer, _| {
3900                            buffer.push_transaction(transaction.clone(), Instant::now());
3901                        });
3902                    }
3903                    Ok(Some(transaction))
3904                } else {
3905                    Ok(None)
3906                }
3907            })
3908        } else {
3909            Task::ready(Err(anyhow!("project does not have a remote id")))
3910        }
3911    }
3912
3913    pub fn code_actions<T: Clone + ToOffset>(
3914        &self,
3915        buffer_handle: &ModelHandle<Buffer>,
3916        range: Range<T>,
3917        cx: &mut ModelContext<Self>,
3918    ) -> Task<Result<Vec<CodeAction>>> {
3919        let buffer = buffer_handle.read(cx);
3920        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
3921        self.request_lsp(buffer_handle.clone(), GetCodeActions { range }, cx)
3922    }
3923
3924    pub fn apply_code_action(
3925        &self,
3926        buffer_handle: ModelHandle<Buffer>,
3927        mut action: CodeAction,
3928        push_to_history: bool,
3929        cx: &mut ModelContext<Self>,
3930    ) -> Task<Result<ProjectTransaction>> {
3931        if self.is_local() {
3932            let buffer = buffer_handle.read(cx);
3933            let (lsp_adapter, lang_server) = if let Some((adapter, server)) =
3934                self.language_server_for_buffer(buffer, action.server_id, cx)
3935            {
3936                (adapter.clone(), server.clone())
3937            } else {
3938                return Task::ready(Ok(Default::default()));
3939            };
3940            let range = action.range.to_point_utf16(buffer);
3941
3942            cx.spawn(|this, mut cx| async move {
3943                if let Some(lsp_range) = action
3944                    .lsp_action
3945                    .data
3946                    .as_mut()
3947                    .and_then(|d| d.get_mut("codeActionParams"))
3948                    .and_then(|d| d.get_mut("range"))
3949                {
3950                    *lsp_range = serde_json::to_value(&range_to_lsp(range)).unwrap();
3951                    action.lsp_action = lang_server
3952                        .request::<lsp::request::CodeActionResolveRequest>(action.lsp_action)
3953                        .await?;
3954                } else {
3955                    let actions = this
3956                        .update(&mut cx, |this, cx| {
3957                            this.code_actions(&buffer_handle, action.range, cx)
3958                        })
3959                        .await?;
3960                    action.lsp_action = actions
3961                        .into_iter()
3962                        .find(|a| a.lsp_action.title == action.lsp_action.title)
3963                        .ok_or_else(|| anyhow!("code action is outdated"))?
3964                        .lsp_action;
3965                }
3966
3967                if let Some(edit) = action.lsp_action.edit {
3968                    if edit.changes.is_some() || edit.document_changes.is_some() {
3969                        return Self::deserialize_workspace_edit(
3970                            this,
3971                            edit,
3972                            push_to_history,
3973                            lsp_adapter.clone(),
3974                            lang_server.clone(),
3975                            &mut cx,
3976                        )
3977                        .await;
3978                    }
3979                }
3980
3981                if let Some(command) = action.lsp_action.command {
3982                    this.update(&mut cx, |this, _| {
3983                        this.last_workspace_edits_by_language_server
3984                            .remove(&lang_server.server_id());
3985                    });
3986                    lang_server
3987                        .request::<lsp::request::ExecuteCommand>(lsp::ExecuteCommandParams {
3988                            command: command.command,
3989                            arguments: command.arguments.unwrap_or_default(),
3990                            ..Default::default()
3991                        })
3992                        .await?;
3993                    return Ok(this.update(&mut cx, |this, _| {
3994                        this.last_workspace_edits_by_language_server
3995                            .remove(&lang_server.server_id())
3996                            .unwrap_or_default()
3997                    }));
3998                }
3999
4000                Ok(ProjectTransaction::default())
4001            })
4002        } else if let Some(project_id) = self.remote_id() {
4003            let client = self.client.clone();
4004            let request = proto::ApplyCodeAction {
4005                project_id,
4006                buffer_id: buffer_handle.read(cx).remote_id(),
4007                action: Some(language::proto::serialize_code_action(&action)),
4008            };
4009            cx.spawn(|this, mut cx| async move {
4010                let response = client
4011                    .request(request)
4012                    .await?
4013                    .transaction
4014                    .ok_or_else(|| anyhow!("missing transaction"))?;
4015                this.update(&mut cx, |this, cx| {
4016                    this.deserialize_project_transaction(response, push_to_history, cx)
4017                })
4018                .await
4019            })
4020        } else {
4021            Task::ready(Err(anyhow!("project does not have a remote id")))
4022        }
4023    }
4024
4025    async fn deserialize_workspace_edit(
4026        this: ModelHandle<Self>,
4027        edit: lsp::WorkspaceEdit,
4028        push_to_history: bool,
4029        lsp_adapter: Arc<CachedLspAdapter>,
4030        language_server: Arc<LanguageServer>,
4031        cx: &mut AsyncAppContext,
4032    ) -> Result<ProjectTransaction> {
4033        let fs = this.read_with(cx, |this, _| this.fs.clone());
4034        let mut operations = Vec::new();
4035        if let Some(document_changes) = edit.document_changes {
4036            match document_changes {
4037                lsp::DocumentChanges::Edits(edits) => {
4038                    operations.extend(edits.into_iter().map(lsp::DocumentChangeOperation::Edit))
4039                }
4040                lsp::DocumentChanges::Operations(ops) => operations = ops,
4041            }
4042        } else if let Some(changes) = edit.changes {
4043            operations.extend(changes.into_iter().map(|(uri, edits)| {
4044                lsp::DocumentChangeOperation::Edit(lsp::TextDocumentEdit {
4045                    text_document: lsp::OptionalVersionedTextDocumentIdentifier {
4046                        uri,
4047                        version: None,
4048                    },
4049                    edits: edits.into_iter().map(lsp::OneOf::Left).collect(),
4050                })
4051            }));
4052        }
4053
4054        let mut project_transaction = ProjectTransaction::default();
4055        for operation in operations {
4056            match operation {
4057                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Create(op)) => {
4058                    let abs_path = op
4059                        .uri
4060                        .to_file_path()
4061                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4062
4063                    if let Some(parent_path) = abs_path.parent() {
4064                        fs.create_dir(parent_path).await?;
4065                    }
4066                    if abs_path.ends_with("/") {
4067                        fs.create_dir(&abs_path).await?;
4068                    } else {
4069                        fs.create_file(&abs_path, op.options.map(Into::into).unwrap_or_default())
4070                            .await?;
4071                    }
4072                }
4073
4074                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Rename(op)) => {
4075                    let source_abs_path = op
4076                        .old_uri
4077                        .to_file_path()
4078                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4079                    let target_abs_path = op
4080                        .new_uri
4081                        .to_file_path()
4082                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4083                    fs.rename(
4084                        &source_abs_path,
4085                        &target_abs_path,
4086                        op.options.map(Into::into).unwrap_or_default(),
4087                    )
4088                    .await?;
4089                }
4090
4091                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Delete(op)) => {
4092                    let abs_path = op
4093                        .uri
4094                        .to_file_path()
4095                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4096                    let options = op.options.map(Into::into).unwrap_or_default();
4097                    if abs_path.ends_with("/") {
4098                        fs.remove_dir(&abs_path, options).await?;
4099                    } else {
4100                        fs.remove_file(&abs_path, options).await?;
4101                    }
4102                }
4103
4104                lsp::DocumentChangeOperation::Edit(op) => {
4105                    let buffer_to_edit = this
4106                        .update(cx, |this, cx| {
4107                            this.open_local_buffer_via_lsp(
4108                                op.text_document.uri,
4109                                language_server.server_id(),
4110                                lsp_adapter.name.clone(),
4111                                cx,
4112                            )
4113                        })
4114                        .await?;
4115
4116                    let edits = this
4117                        .update(cx, |this, cx| {
4118                            let edits = op.edits.into_iter().map(|edit| match edit {
4119                                lsp::OneOf::Left(edit) => edit,
4120                                lsp::OneOf::Right(edit) => edit.text_edit,
4121                            });
4122                            this.edits_from_lsp(
4123                                &buffer_to_edit,
4124                                edits,
4125                                language_server.server_id(),
4126                                op.text_document.version,
4127                                cx,
4128                            )
4129                        })
4130                        .await?;
4131
4132                    let transaction = buffer_to_edit.update(cx, |buffer, cx| {
4133                        buffer.finalize_last_transaction();
4134                        buffer.start_transaction();
4135                        for (range, text) in edits {
4136                            buffer.edit([(range, text)], None, cx);
4137                        }
4138                        let transaction = if buffer.end_transaction(cx).is_some() {
4139                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
4140                            if !push_to_history {
4141                                buffer.forget_transaction(transaction.id);
4142                            }
4143                            Some(transaction)
4144                        } else {
4145                            None
4146                        };
4147
4148                        transaction
4149                    });
4150                    if let Some(transaction) = transaction {
4151                        project_transaction.0.insert(buffer_to_edit, transaction);
4152                    }
4153                }
4154            }
4155        }
4156
4157        Ok(project_transaction)
4158    }
4159
4160    pub fn prepare_rename<T: ToPointUtf16>(
4161        &self,
4162        buffer: ModelHandle<Buffer>,
4163        position: T,
4164        cx: &mut ModelContext<Self>,
4165    ) -> Task<Result<Option<Range<Anchor>>>> {
4166        let position = position.to_point_utf16(buffer.read(cx));
4167        self.request_lsp(buffer, PrepareRename { position }, cx)
4168    }
4169
4170    pub fn perform_rename<T: ToPointUtf16>(
4171        &self,
4172        buffer: ModelHandle<Buffer>,
4173        position: T,
4174        new_name: String,
4175        push_to_history: bool,
4176        cx: &mut ModelContext<Self>,
4177    ) -> Task<Result<ProjectTransaction>> {
4178        let position = position.to_point_utf16(buffer.read(cx));
4179        self.request_lsp(
4180            buffer,
4181            PerformRename {
4182                position,
4183                new_name,
4184                push_to_history,
4185            },
4186            cx,
4187        )
4188    }
4189
4190    #[allow(clippy::type_complexity)]
4191    pub fn search(
4192        &self,
4193        query: SearchQuery,
4194        cx: &mut ModelContext<Self>,
4195    ) -> Task<Result<HashMap<ModelHandle<Buffer>, Vec<Range<Anchor>>>>> {
4196        if self.is_local() {
4197            let snapshots = self
4198                .visible_worktrees(cx)
4199                .filter_map(|tree| {
4200                    let tree = tree.read(cx).as_local()?;
4201                    Some(tree.snapshot())
4202                })
4203                .collect::<Vec<_>>();
4204
4205            let background = cx.background().clone();
4206            let path_count: usize = snapshots.iter().map(|s| s.visible_file_count()).sum();
4207            if path_count == 0 {
4208                return Task::ready(Ok(Default::default()));
4209            }
4210            let workers = background.num_cpus().min(path_count);
4211            let (matching_paths_tx, mut matching_paths_rx) = smol::channel::bounded(1024);
4212            cx.background()
4213                .spawn({
4214                    let fs = self.fs.clone();
4215                    let background = cx.background().clone();
4216                    let query = query.clone();
4217                    async move {
4218                        let fs = &fs;
4219                        let query = &query;
4220                        let matching_paths_tx = &matching_paths_tx;
4221                        let paths_per_worker = (path_count + workers - 1) / workers;
4222                        let snapshots = &snapshots;
4223                        background
4224                            .scoped(|scope| {
4225                                for worker_ix in 0..workers {
4226                                    let worker_start_ix = worker_ix * paths_per_worker;
4227                                    let worker_end_ix = worker_start_ix + paths_per_worker;
4228                                    scope.spawn(async move {
4229                                        let mut snapshot_start_ix = 0;
4230                                        let mut abs_path = PathBuf::new();
4231                                        for snapshot in snapshots {
4232                                            let snapshot_end_ix =
4233                                                snapshot_start_ix + snapshot.visible_file_count();
4234                                            if worker_end_ix <= snapshot_start_ix {
4235                                                break;
4236                                            } else if worker_start_ix > snapshot_end_ix {
4237                                                snapshot_start_ix = snapshot_end_ix;
4238                                                continue;
4239                                            } else {
4240                                                let start_in_snapshot = worker_start_ix
4241                                                    .saturating_sub(snapshot_start_ix);
4242                                                let end_in_snapshot =
4243                                                    cmp::min(worker_end_ix, snapshot_end_ix)
4244                                                        - snapshot_start_ix;
4245
4246                                                for entry in snapshot
4247                                                    .files(false, start_in_snapshot)
4248                                                    .take(end_in_snapshot - start_in_snapshot)
4249                                                {
4250                                                    if matching_paths_tx.is_closed() {
4251                                                        break;
4252                                                    }
4253                                                    let matches = if query
4254                                                        .file_matches(Some(&entry.path))
4255                                                    {
4256                                                        abs_path.clear();
4257                                                        abs_path.push(&snapshot.abs_path());
4258                                                        abs_path.push(&entry.path);
4259                                                        if let Some(file) =
4260                                                            fs.open_sync(&abs_path).await.log_err()
4261                                                        {
4262                                                            query.detect(file).unwrap_or(false)
4263                                                        } else {
4264                                                            false
4265                                                        }
4266                                                    } else {
4267                                                        false
4268                                                    };
4269
4270                                                    if matches {
4271                                                        let project_path =
4272                                                            (snapshot.id(), entry.path.clone());
4273                                                        if matching_paths_tx
4274                                                            .send(project_path)
4275                                                            .await
4276                                                            .is_err()
4277                                                        {
4278                                                            break;
4279                                                        }
4280                                                    }
4281                                                }
4282
4283                                                snapshot_start_ix = snapshot_end_ix;
4284                                            }
4285                                        }
4286                                    });
4287                                }
4288                            })
4289                            .await;
4290                    }
4291                })
4292                .detach();
4293
4294            let (buffers_tx, buffers_rx) = smol::channel::bounded(1024);
4295            let open_buffers = self
4296                .opened_buffers
4297                .values()
4298                .filter_map(|b| b.upgrade(cx))
4299                .collect::<HashSet<_>>();
4300            cx.spawn(|this, cx| async move {
4301                for buffer in &open_buffers {
4302                    let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4303                    buffers_tx.send((buffer.clone(), snapshot)).await?;
4304                }
4305
4306                let open_buffers = Rc::new(RefCell::new(open_buffers));
4307                while let Some(project_path) = matching_paths_rx.next().await {
4308                    if buffers_tx.is_closed() {
4309                        break;
4310                    }
4311
4312                    let this = this.clone();
4313                    let open_buffers = open_buffers.clone();
4314                    let buffers_tx = buffers_tx.clone();
4315                    cx.spawn(|mut cx| async move {
4316                        if let Some(buffer) = this
4317                            .update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
4318                            .await
4319                            .log_err()
4320                        {
4321                            if open_buffers.borrow_mut().insert(buffer.clone()) {
4322                                let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
4323                                buffers_tx.send((buffer, snapshot)).await?;
4324                            }
4325                        }
4326
4327                        Ok::<_, anyhow::Error>(())
4328                    })
4329                    .detach();
4330                }
4331
4332                Ok::<_, anyhow::Error>(())
4333            })
4334            .detach_and_log_err(cx);
4335
4336            let background = cx.background().clone();
4337            cx.background().spawn(async move {
4338                let query = &query;
4339                let mut matched_buffers = Vec::new();
4340                for _ in 0..workers {
4341                    matched_buffers.push(HashMap::default());
4342                }
4343                background
4344                    .scoped(|scope| {
4345                        for worker_matched_buffers in matched_buffers.iter_mut() {
4346                            let mut buffers_rx = buffers_rx.clone();
4347                            scope.spawn(async move {
4348                                while let Some((buffer, snapshot)) = buffers_rx.next().await {
4349                                    let buffer_matches = if query.file_matches(
4350                                        snapshot.file().map(|file| file.path().as_ref()),
4351                                    ) {
4352                                        query
4353                                            .search(snapshot.as_rope())
4354                                            .await
4355                                            .iter()
4356                                            .map(|range| {
4357                                                snapshot.anchor_before(range.start)
4358                                                    ..snapshot.anchor_after(range.end)
4359                                            })
4360                                            .collect()
4361                                    } else {
4362                                        Vec::new()
4363                                    };
4364                                    if !buffer_matches.is_empty() {
4365                                        worker_matched_buffers
4366                                            .insert(buffer.clone(), buffer_matches);
4367                                    }
4368                                }
4369                            });
4370                        }
4371                    })
4372                    .await;
4373                Ok(matched_buffers.into_iter().flatten().collect())
4374            })
4375        } else if let Some(project_id) = self.remote_id() {
4376            let request = self.client.request(query.to_proto(project_id));
4377            cx.spawn(|this, mut cx| async move {
4378                let response = request.await?;
4379                let mut result = HashMap::default();
4380                for location in response.locations {
4381                    let target_buffer = this
4382                        .update(&mut cx, |this, cx| {
4383                            this.wait_for_remote_buffer(location.buffer_id, cx)
4384                        })
4385                        .await?;
4386                    let start = location
4387                        .start
4388                        .and_then(deserialize_anchor)
4389                        .ok_or_else(|| anyhow!("missing target start"))?;
4390                    let end = location
4391                        .end
4392                        .and_then(deserialize_anchor)
4393                        .ok_or_else(|| anyhow!("missing target end"))?;
4394                    result
4395                        .entry(target_buffer)
4396                        .or_insert(Vec::new())
4397                        .push(start..end)
4398                }
4399                Ok(result)
4400            })
4401        } else {
4402            Task::ready(Ok(Default::default()))
4403        }
4404    }
4405
4406    // TODO: Wire this up to allow selecting a server?
4407    fn request_lsp<R: LspCommand>(
4408        &self,
4409        buffer_handle: ModelHandle<Buffer>,
4410        request: R,
4411        cx: &mut ModelContext<Self>,
4412    ) -> Task<Result<R::Response>>
4413    where
4414        <R::LspRequest as lsp::request::Request>::Result: Send,
4415    {
4416        let buffer = buffer_handle.read(cx);
4417        if self.is_local() {
4418            let file = File::from_dyn(buffer.file()).and_then(File::as_local);
4419            if let Some((file, language_server)) = file.zip(
4420                self.primary_language_servers_for_buffer(buffer, cx)
4421                    .map(|(_, server)| server.clone()),
4422            ) {
4423                let lsp_params = request.to_lsp(&file.abs_path(cx), buffer, &language_server, cx);
4424                return cx.spawn(|this, cx| async move {
4425                    if !request.check_capabilities(language_server.capabilities()) {
4426                        return Ok(Default::default());
4427                    }
4428
4429                    let response = language_server
4430                        .request::<R::LspRequest>(lsp_params)
4431                        .await
4432                        .context("lsp request failed")?;
4433                    request
4434                        .response_from_lsp(
4435                            response,
4436                            this,
4437                            buffer_handle,
4438                            language_server.server_id(),
4439                            cx,
4440                        )
4441                        .await
4442                });
4443            }
4444        } else if let Some(project_id) = self.remote_id() {
4445            let rpc = self.client.clone();
4446            let message = request.to_proto(project_id, buffer);
4447            return cx.spawn_weak(|this, cx| async move {
4448                // Ensure the project is still alive by the time the task
4449                // is scheduled.
4450                this.upgrade(&cx)
4451                    .ok_or_else(|| anyhow!("project dropped"))?;
4452
4453                let response = rpc.request(message).await?;
4454
4455                let this = this
4456                    .upgrade(&cx)
4457                    .ok_or_else(|| anyhow!("project dropped"))?;
4458                if this.read_with(&cx, |this, _| this.is_read_only()) {
4459                    Err(anyhow!("disconnected before completing request"))
4460                } else {
4461                    request
4462                        .response_from_proto(response, this, buffer_handle, cx)
4463                        .await
4464                }
4465            });
4466        }
4467        Task::ready(Ok(Default::default()))
4468    }
4469
4470    pub fn find_or_create_local_worktree(
4471        &mut self,
4472        abs_path: impl AsRef<Path>,
4473        visible: bool,
4474        cx: &mut ModelContext<Self>,
4475    ) -> Task<Result<(ModelHandle<Worktree>, PathBuf)>> {
4476        let abs_path = abs_path.as_ref();
4477        if let Some((tree, relative_path)) = self.find_local_worktree(abs_path, cx) {
4478            Task::ready(Ok((tree, relative_path)))
4479        } else {
4480            let worktree = self.create_local_worktree(abs_path, visible, cx);
4481            cx.foreground()
4482                .spawn(async move { Ok((worktree.await?, PathBuf::new())) })
4483        }
4484    }
4485
4486    pub fn find_local_worktree(
4487        &self,
4488        abs_path: &Path,
4489        cx: &AppContext,
4490    ) -> Option<(ModelHandle<Worktree>, PathBuf)> {
4491        for tree in &self.worktrees {
4492            if let Some(tree) = tree.upgrade(cx) {
4493                if let Some(relative_path) = tree
4494                    .read(cx)
4495                    .as_local()
4496                    .and_then(|t| abs_path.strip_prefix(t.abs_path()).ok())
4497                {
4498                    return Some((tree.clone(), relative_path.into()));
4499                }
4500            }
4501        }
4502        None
4503    }
4504
4505    pub fn is_shared(&self) -> bool {
4506        match &self.client_state {
4507            Some(ProjectClientState::Local { .. }) => true,
4508            _ => false,
4509        }
4510    }
4511
4512    fn create_local_worktree(
4513        &mut self,
4514        abs_path: impl AsRef<Path>,
4515        visible: bool,
4516        cx: &mut ModelContext<Self>,
4517    ) -> Task<Result<ModelHandle<Worktree>>> {
4518        let fs = self.fs.clone();
4519        let client = self.client.clone();
4520        let next_entry_id = self.next_entry_id.clone();
4521        let path: Arc<Path> = abs_path.as_ref().into();
4522        let task = self
4523            .loading_local_worktrees
4524            .entry(path.clone())
4525            .or_insert_with(|| {
4526                cx.spawn(|project, mut cx| {
4527                    async move {
4528                        let worktree = Worktree::local(
4529                            client.clone(),
4530                            path.clone(),
4531                            visible,
4532                            fs,
4533                            next_entry_id,
4534                            &mut cx,
4535                        )
4536                        .await;
4537
4538                        project.update(&mut cx, |project, _| {
4539                            project.loading_local_worktrees.remove(&path);
4540                        });
4541
4542                        let worktree = worktree?;
4543                        project.update(&mut cx, |project, cx| project.add_worktree(&worktree, cx));
4544                        Ok(worktree)
4545                    }
4546                    .map_err(Arc::new)
4547                })
4548                .shared()
4549            })
4550            .clone();
4551        cx.foreground().spawn(async move {
4552            match task.await {
4553                Ok(worktree) => Ok(worktree),
4554                Err(err) => Err(anyhow!("{}", err)),
4555            }
4556        })
4557    }
4558
4559    pub fn remove_worktree(&mut self, id_to_remove: WorktreeId, cx: &mut ModelContext<Self>) {
4560        self.worktrees.retain(|worktree| {
4561            if let Some(worktree) = worktree.upgrade(cx) {
4562                let id = worktree.read(cx).id();
4563                if id == id_to_remove {
4564                    cx.emit(Event::WorktreeRemoved(id));
4565                    false
4566                } else {
4567                    true
4568                }
4569            } else {
4570                false
4571            }
4572        });
4573        self.metadata_changed(cx);
4574    }
4575
4576    fn add_worktree(&mut self, worktree: &ModelHandle<Worktree>, cx: &mut ModelContext<Self>) {
4577        cx.observe(worktree, |_, _, cx| cx.notify()).detach();
4578        if worktree.read(cx).is_local() {
4579            cx.subscribe(worktree, |this, worktree, event, cx| match event {
4580                worktree::Event::UpdatedEntries(changes) => {
4581                    this.update_local_worktree_buffers(&worktree, &changes, cx);
4582                    this.update_local_worktree_language_servers(&worktree, changes, cx);
4583                }
4584                worktree::Event::UpdatedGitRepositories(updated_repos) => {
4585                    this.update_local_worktree_buffers_git_repos(worktree, updated_repos, cx)
4586                }
4587            })
4588            .detach();
4589        }
4590
4591        let push_strong_handle = {
4592            let worktree = worktree.read(cx);
4593            self.is_shared() || worktree.is_visible() || worktree.is_remote()
4594        };
4595        if push_strong_handle {
4596            self.worktrees
4597                .push(WorktreeHandle::Strong(worktree.clone()));
4598        } else {
4599            self.worktrees
4600                .push(WorktreeHandle::Weak(worktree.downgrade()));
4601        }
4602
4603        cx.observe_release(worktree, |this, worktree, cx| {
4604            let _ = this.remove_worktree(worktree.id(), cx);
4605        })
4606        .detach();
4607
4608        cx.emit(Event::WorktreeAdded);
4609        self.metadata_changed(cx);
4610    }
4611
4612    fn update_local_worktree_buffers(
4613        &mut self,
4614        worktree_handle: &ModelHandle<Worktree>,
4615        changes: &HashMap<(Arc<Path>, ProjectEntryId), PathChange>,
4616        cx: &mut ModelContext<Self>,
4617    ) {
4618        let snapshot = worktree_handle.read(cx).snapshot();
4619
4620        let mut renamed_buffers = Vec::new();
4621        for (path, entry_id) in changes.keys() {
4622            let worktree_id = worktree_handle.read(cx).id();
4623            let project_path = ProjectPath {
4624                worktree_id,
4625                path: path.clone(),
4626            };
4627
4628            let buffer_id = match self.local_buffer_ids_by_entry_id.get(entry_id) {
4629                Some(&buffer_id) => buffer_id,
4630                None => match self.local_buffer_ids_by_path.get(&project_path) {
4631                    Some(&buffer_id) => buffer_id,
4632                    None => continue,
4633                },
4634            };
4635
4636            let open_buffer = self.opened_buffers.get(&buffer_id);
4637            let buffer = if let Some(buffer) = open_buffer.and_then(|buffer| buffer.upgrade(cx)) {
4638                buffer
4639            } else {
4640                self.opened_buffers.remove(&buffer_id);
4641                self.local_buffer_ids_by_path.remove(&project_path);
4642                self.local_buffer_ids_by_entry_id.remove(entry_id);
4643                continue;
4644            };
4645
4646            buffer.update(cx, |buffer, cx| {
4647                if let Some(old_file) = File::from_dyn(buffer.file()) {
4648                    if old_file.worktree != *worktree_handle {
4649                        return;
4650                    }
4651
4652                    let new_file = if let Some(entry) = snapshot.entry_for_id(old_file.entry_id) {
4653                        File {
4654                            is_local: true,
4655                            entry_id: entry.id,
4656                            mtime: entry.mtime,
4657                            path: entry.path.clone(),
4658                            worktree: worktree_handle.clone(),
4659                            is_deleted: false,
4660                        }
4661                    } else if let Some(entry) = snapshot.entry_for_path(old_file.path().as_ref()) {
4662                        File {
4663                            is_local: true,
4664                            entry_id: entry.id,
4665                            mtime: entry.mtime,
4666                            path: entry.path.clone(),
4667                            worktree: worktree_handle.clone(),
4668                            is_deleted: false,
4669                        }
4670                    } else {
4671                        File {
4672                            is_local: true,
4673                            entry_id: old_file.entry_id,
4674                            path: old_file.path().clone(),
4675                            mtime: old_file.mtime(),
4676                            worktree: worktree_handle.clone(),
4677                            is_deleted: true,
4678                        }
4679                    };
4680
4681                    let old_path = old_file.abs_path(cx);
4682                    if new_file.abs_path(cx) != old_path {
4683                        renamed_buffers.push((cx.handle(), old_file.clone()));
4684                        self.local_buffer_ids_by_path.remove(&project_path);
4685                        self.local_buffer_ids_by_path.insert(
4686                            ProjectPath {
4687                                worktree_id,
4688                                path: path.clone(),
4689                            },
4690                            buffer_id,
4691                        );
4692                    }
4693
4694                    if new_file.entry_id != *entry_id {
4695                        self.local_buffer_ids_by_entry_id.remove(entry_id);
4696                        self.local_buffer_ids_by_entry_id
4697                            .insert(new_file.entry_id, buffer_id);
4698                    }
4699
4700                    if new_file != *old_file {
4701                        if let Some(project_id) = self.remote_id() {
4702                            self.client
4703                                .send(proto::UpdateBufferFile {
4704                                    project_id,
4705                                    buffer_id: buffer_id as u64,
4706                                    file: Some(new_file.to_proto()),
4707                                })
4708                                .log_err();
4709                        }
4710
4711                        buffer.file_updated(Arc::new(new_file), cx).detach();
4712                    }
4713                }
4714            });
4715        }
4716
4717        for (buffer, old_file) in renamed_buffers {
4718            self.unregister_buffer_from_language_servers(&buffer, &old_file, cx);
4719            self.detect_language_for_buffer(&buffer, cx);
4720            self.register_buffer_with_language_servers(&buffer, cx);
4721        }
4722    }
4723
4724    fn update_local_worktree_language_servers(
4725        &mut self,
4726        worktree_handle: &ModelHandle<Worktree>,
4727        changes: &HashMap<(Arc<Path>, ProjectEntryId), PathChange>,
4728        cx: &mut ModelContext<Self>,
4729    ) {
4730        if changes.is_empty() {
4731            return;
4732        }
4733
4734        let worktree_id = worktree_handle.read(cx).id();
4735        let mut language_server_ids = self
4736            .language_server_ids
4737            .iter()
4738            .filter_map(|((server_worktree_id, _), server_id)| {
4739                (*server_worktree_id == worktree_id).then_some(*server_id)
4740            })
4741            .collect::<Vec<_>>();
4742        language_server_ids.sort();
4743        language_server_ids.dedup();
4744
4745        let abs_path = worktree_handle.read(cx).abs_path();
4746        for server_id in &language_server_ids {
4747            if let Some(server) = self.language_servers.get(server_id) {
4748                if let LanguageServerState::Running {
4749                    server,
4750                    watched_paths,
4751                    ..
4752                } = server
4753                {
4754                    if let Some(watched_paths) = watched_paths.get(&worktree_id) {
4755                        let params = lsp::DidChangeWatchedFilesParams {
4756                            changes: changes
4757                                .iter()
4758                                .filter_map(|((path, _), change)| {
4759                                    if watched_paths.is_match(&path) {
4760                                        Some(lsp::FileEvent {
4761                                            uri: lsp::Url::from_file_path(abs_path.join(path))
4762                                                .unwrap(),
4763                                            typ: match change {
4764                                                PathChange::Added => lsp::FileChangeType::CREATED,
4765                                                PathChange::Removed => lsp::FileChangeType::DELETED,
4766                                                PathChange::Updated
4767                                                | PathChange::AddedOrUpdated => {
4768                                                    lsp::FileChangeType::CHANGED
4769                                                }
4770                                            },
4771                                        })
4772                                    } else {
4773                                        None
4774                                    }
4775                                })
4776                                .collect(),
4777                        };
4778
4779                        if !params.changes.is_empty() {
4780                            server
4781                                .notify::<lsp::notification::DidChangeWatchedFiles>(params)
4782                                .log_err();
4783                        }
4784                    }
4785                }
4786            }
4787        }
4788    }
4789
4790    fn update_local_worktree_buffers_git_repos(
4791        &mut self,
4792        worktree_handle: ModelHandle<Worktree>,
4793        repos: &HashMap<Arc<Path>, LocalRepositoryEntry>,
4794        cx: &mut ModelContext<Self>,
4795    ) {
4796        debug_assert!(worktree_handle.read(cx).is_local());
4797
4798        // Setup the pending buffers
4799        let future_buffers = self
4800            .loading_buffers_by_path
4801            .iter()
4802            .filter_map(|(path, receiver)| {
4803                let path = &path.path;
4804                let (work_directory, repo) = repos
4805                    .iter()
4806                    .find(|(work_directory, _)| path.starts_with(work_directory))?;
4807
4808                let repo_relative_path = path.strip_prefix(work_directory).log_err()?;
4809
4810                let receiver = receiver.clone();
4811                let repo_ptr = repo.repo_ptr.clone();
4812                let repo_relative_path = repo_relative_path.to_owned();
4813                Some(async move {
4814                    pump_loading_buffer_reciever(receiver)
4815                        .await
4816                        .ok()
4817                        .map(|buffer| (buffer, repo_relative_path, repo_ptr))
4818                })
4819            })
4820            .collect::<FuturesUnordered<_>>()
4821            .filter_map(|result| async move {
4822                let (buffer_handle, repo_relative_path, repo_ptr) = result?;
4823
4824                let lock = repo_ptr.lock();
4825                lock.load_index_text(&repo_relative_path)
4826                    .map(|diff_base| (diff_base, buffer_handle))
4827            });
4828
4829        let update_diff_base_fn = update_diff_base(self);
4830        cx.spawn(|_, mut cx| async move {
4831            let diff_base_tasks = cx
4832                .background()
4833                .spawn(future_buffers.collect::<Vec<_>>())
4834                .await;
4835
4836            for (diff_base, buffer) in diff_base_tasks.into_iter() {
4837                update_diff_base_fn(Some(diff_base), buffer, &mut cx);
4838            }
4839        })
4840        .detach();
4841
4842        // And the current buffers
4843        for (_, buffer) in &self.opened_buffers {
4844            if let Some(buffer) = buffer.upgrade(cx) {
4845                let file = match File::from_dyn(buffer.read(cx).file()) {
4846                    Some(file) => file,
4847                    None => continue,
4848                };
4849                if file.worktree != worktree_handle {
4850                    continue;
4851                }
4852
4853                let path = file.path().clone();
4854
4855                let worktree = worktree_handle.read(cx);
4856
4857                let (work_directory, repo) = match repos
4858                    .iter()
4859                    .find(|(work_directory, _)| path.starts_with(work_directory))
4860                {
4861                    Some(repo) => repo.clone(),
4862                    None => continue,
4863                };
4864
4865                let relative_repo = match path.strip_prefix(work_directory).log_err() {
4866                    Some(relative_repo) => relative_repo.to_owned(),
4867                    None => continue,
4868                };
4869
4870                drop(worktree);
4871
4872                let update_diff_base_fn = update_diff_base(self);
4873                let git_ptr = repo.repo_ptr.clone();
4874                let diff_base_task = cx
4875                    .background()
4876                    .spawn(async move { git_ptr.lock().load_index_text(&relative_repo) });
4877
4878                cx.spawn(|_, mut cx| async move {
4879                    let diff_base = diff_base_task.await;
4880                    update_diff_base_fn(diff_base, buffer, &mut cx);
4881                })
4882                .detach();
4883            }
4884        }
4885    }
4886
4887    pub fn set_active_path(&mut self, entry: Option<ProjectPath>, cx: &mut ModelContext<Self>) {
4888        let new_active_entry = entry.and_then(|project_path| {
4889            let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
4890            let entry = worktree.read(cx).entry_for_path(project_path.path)?;
4891            Some(entry.id)
4892        });
4893        if new_active_entry != self.active_entry {
4894            self.active_entry = new_active_entry;
4895            cx.emit(Event::ActiveEntryChanged(new_active_entry));
4896        }
4897    }
4898
4899    pub fn language_servers_running_disk_based_diagnostics(
4900        &self,
4901    ) -> impl Iterator<Item = LanguageServerId> + '_ {
4902        self.language_server_statuses
4903            .iter()
4904            .filter_map(|(id, status)| {
4905                if status.has_pending_diagnostic_updates {
4906                    Some(*id)
4907                } else {
4908                    None
4909                }
4910            })
4911    }
4912
4913    pub fn diagnostic_summary(&self, cx: &AppContext) -> DiagnosticSummary {
4914        let mut summary = DiagnosticSummary::default();
4915        for (_, _, path_summary) in self.diagnostic_summaries(cx) {
4916            summary.error_count += path_summary.error_count;
4917            summary.warning_count += path_summary.warning_count;
4918        }
4919        summary
4920    }
4921
4922    pub fn diagnostic_summaries<'a>(
4923        &'a self,
4924        cx: &'a AppContext,
4925    ) -> impl Iterator<Item = (ProjectPath, LanguageServerId, DiagnosticSummary)> + 'a {
4926        self.visible_worktrees(cx).flat_map(move |worktree| {
4927            let worktree = worktree.read(cx);
4928            let worktree_id = worktree.id();
4929            worktree
4930                .diagnostic_summaries()
4931                .map(move |(path, server_id, summary)| {
4932                    (ProjectPath { worktree_id, path }, server_id, summary)
4933                })
4934        })
4935    }
4936
4937    pub fn disk_based_diagnostics_started(
4938        &mut self,
4939        language_server_id: LanguageServerId,
4940        cx: &mut ModelContext<Self>,
4941    ) {
4942        cx.emit(Event::DiskBasedDiagnosticsStarted { language_server_id });
4943    }
4944
4945    pub fn disk_based_diagnostics_finished(
4946        &mut self,
4947        language_server_id: LanguageServerId,
4948        cx: &mut ModelContext<Self>,
4949    ) {
4950        cx.emit(Event::DiskBasedDiagnosticsFinished { language_server_id });
4951    }
4952
4953    pub fn active_entry(&self) -> Option<ProjectEntryId> {
4954        self.active_entry
4955    }
4956
4957    pub fn entry_for_path(&self, path: &ProjectPath, cx: &AppContext) -> Option<Entry> {
4958        self.worktree_for_id(path.worktree_id, cx)?
4959            .read(cx)
4960            .entry_for_path(&path.path)
4961            .cloned()
4962    }
4963
4964    pub fn path_for_entry(&self, entry_id: ProjectEntryId, cx: &AppContext) -> Option<ProjectPath> {
4965        let worktree = self.worktree_for_entry(entry_id, cx)?;
4966        let worktree = worktree.read(cx);
4967        let worktree_id = worktree.id();
4968        let path = worktree.entry_for_id(entry_id)?.path.clone();
4969        Some(ProjectPath { worktree_id, path })
4970    }
4971
4972    // RPC message handlers
4973
4974    async fn handle_unshare_project(
4975        this: ModelHandle<Self>,
4976        _: TypedEnvelope<proto::UnshareProject>,
4977        _: Arc<Client>,
4978        mut cx: AsyncAppContext,
4979    ) -> Result<()> {
4980        this.update(&mut cx, |this, cx| {
4981            if this.is_local() {
4982                this.unshare(cx)?;
4983            } else {
4984                this.disconnected_from_host(cx);
4985            }
4986            Ok(())
4987        })
4988    }
4989
4990    async fn handle_add_collaborator(
4991        this: ModelHandle<Self>,
4992        mut envelope: TypedEnvelope<proto::AddProjectCollaborator>,
4993        _: Arc<Client>,
4994        mut cx: AsyncAppContext,
4995    ) -> Result<()> {
4996        let collaborator = envelope
4997            .payload
4998            .collaborator
4999            .take()
5000            .ok_or_else(|| anyhow!("empty collaborator"))?;
5001
5002        let collaborator = Collaborator::from_proto(collaborator)?;
5003        this.update(&mut cx, |this, cx| {
5004            this.shared_buffers.remove(&collaborator.peer_id);
5005            this.collaborators
5006                .insert(collaborator.peer_id, collaborator);
5007            cx.notify();
5008        });
5009
5010        Ok(())
5011    }
5012
5013    async fn handle_update_project_collaborator(
5014        this: ModelHandle<Self>,
5015        envelope: TypedEnvelope<proto::UpdateProjectCollaborator>,
5016        _: Arc<Client>,
5017        mut cx: AsyncAppContext,
5018    ) -> Result<()> {
5019        let old_peer_id = envelope
5020            .payload
5021            .old_peer_id
5022            .ok_or_else(|| anyhow!("missing old peer id"))?;
5023        let new_peer_id = envelope
5024            .payload
5025            .new_peer_id
5026            .ok_or_else(|| anyhow!("missing new peer id"))?;
5027        this.update(&mut cx, |this, cx| {
5028            let collaborator = this
5029                .collaborators
5030                .remove(&old_peer_id)
5031                .ok_or_else(|| anyhow!("received UpdateProjectCollaborator for unknown peer"))?;
5032            let is_host = collaborator.replica_id == 0;
5033            this.collaborators.insert(new_peer_id, collaborator);
5034
5035            let buffers = this.shared_buffers.remove(&old_peer_id);
5036            log::info!(
5037                "peer {} became {}. moving buffers {:?}",
5038                old_peer_id,
5039                new_peer_id,
5040                &buffers
5041            );
5042            if let Some(buffers) = buffers {
5043                this.shared_buffers.insert(new_peer_id, buffers);
5044            }
5045
5046            if is_host {
5047                this.opened_buffers
5048                    .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
5049                this.buffer_ordered_messages_tx
5050                    .unbounded_send(BufferOrderedMessage::Resync)
5051                    .unwrap();
5052            }
5053
5054            cx.emit(Event::CollaboratorUpdated {
5055                old_peer_id,
5056                new_peer_id,
5057            });
5058            cx.notify();
5059            Ok(())
5060        })
5061    }
5062
5063    async fn handle_remove_collaborator(
5064        this: ModelHandle<Self>,
5065        envelope: TypedEnvelope<proto::RemoveProjectCollaborator>,
5066        _: Arc<Client>,
5067        mut cx: AsyncAppContext,
5068    ) -> Result<()> {
5069        this.update(&mut cx, |this, cx| {
5070            let peer_id = envelope
5071                .payload
5072                .peer_id
5073                .ok_or_else(|| anyhow!("invalid peer id"))?;
5074            let replica_id = this
5075                .collaborators
5076                .remove(&peer_id)
5077                .ok_or_else(|| anyhow!("unknown peer {:?}", peer_id))?
5078                .replica_id;
5079            for buffer in this.opened_buffers.values() {
5080                if let Some(buffer) = buffer.upgrade(cx) {
5081                    buffer.update(cx, |buffer, cx| buffer.remove_peer(replica_id, cx));
5082                }
5083            }
5084            this.shared_buffers.remove(&peer_id);
5085
5086            cx.emit(Event::CollaboratorLeft(peer_id));
5087            cx.notify();
5088            Ok(())
5089        })
5090    }
5091
5092    async fn handle_update_project(
5093        this: ModelHandle<Self>,
5094        envelope: TypedEnvelope<proto::UpdateProject>,
5095        _: Arc<Client>,
5096        mut cx: AsyncAppContext,
5097    ) -> Result<()> {
5098        this.update(&mut cx, |this, cx| {
5099            // Don't handle messages that were sent before the response to us joining the project
5100            if envelope.message_id > this.join_project_response_message_id {
5101                this.set_worktrees_from_proto(envelope.payload.worktrees, cx)?;
5102            }
5103            Ok(())
5104        })
5105    }
5106
5107    async fn handle_update_worktree(
5108        this: ModelHandle<Self>,
5109        envelope: TypedEnvelope<proto::UpdateWorktree>,
5110        _: Arc<Client>,
5111        mut cx: AsyncAppContext,
5112    ) -> Result<()> {
5113        this.update(&mut cx, |this, cx| {
5114            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5115            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
5116                worktree.update(cx, |worktree, _| {
5117                    let worktree = worktree.as_remote_mut().unwrap();
5118                    worktree.update_from_remote(envelope.payload);
5119                });
5120            }
5121            Ok(())
5122        })
5123    }
5124
5125    async fn handle_create_project_entry(
5126        this: ModelHandle<Self>,
5127        envelope: TypedEnvelope<proto::CreateProjectEntry>,
5128        _: Arc<Client>,
5129        mut cx: AsyncAppContext,
5130    ) -> Result<proto::ProjectEntryResponse> {
5131        let worktree = this.update(&mut cx, |this, cx| {
5132            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5133            this.worktree_for_id(worktree_id, cx)
5134                .ok_or_else(|| anyhow!("worktree not found"))
5135        })?;
5136        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5137        let entry = worktree
5138            .update(&mut cx, |worktree, cx| {
5139                let worktree = worktree.as_local_mut().unwrap();
5140                let path = PathBuf::from(envelope.payload.path);
5141                worktree.create_entry(path, envelope.payload.is_directory, cx)
5142            })
5143            .await?;
5144        Ok(proto::ProjectEntryResponse {
5145            entry: Some((&entry).into()),
5146            worktree_scan_id: worktree_scan_id as u64,
5147        })
5148    }
5149
5150    async fn handle_rename_project_entry(
5151        this: ModelHandle<Self>,
5152        envelope: TypedEnvelope<proto::RenameProjectEntry>,
5153        _: Arc<Client>,
5154        mut cx: AsyncAppContext,
5155    ) -> Result<proto::ProjectEntryResponse> {
5156        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
5157        let worktree = this.read_with(&cx, |this, cx| {
5158            this.worktree_for_entry(entry_id, cx)
5159                .ok_or_else(|| anyhow!("worktree not found"))
5160        })?;
5161        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5162        let entry = worktree
5163            .update(&mut cx, |worktree, cx| {
5164                let new_path = PathBuf::from(envelope.payload.new_path);
5165                worktree
5166                    .as_local_mut()
5167                    .unwrap()
5168                    .rename_entry(entry_id, new_path, cx)
5169                    .ok_or_else(|| anyhow!("invalid entry"))
5170            })?
5171            .await?;
5172        Ok(proto::ProjectEntryResponse {
5173            entry: Some((&entry).into()),
5174            worktree_scan_id: worktree_scan_id as u64,
5175        })
5176    }
5177
5178    async fn handle_copy_project_entry(
5179        this: ModelHandle<Self>,
5180        envelope: TypedEnvelope<proto::CopyProjectEntry>,
5181        _: Arc<Client>,
5182        mut cx: AsyncAppContext,
5183    ) -> Result<proto::ProjectEntryResponse> {
5184        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
5185        let worktree = this.read_with(&cx, |this, cx| {
5186            this.worktree_for_entry(entry_id, cx)
5187                .ok_or_else(|| anyhow!("worktree not found"))
5188        })?;
5189        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5190        let entry = worktree
5191            .update(&mut cx, |worktree, cx| {
5192                let new_path = PathBuf::from(envelope.payload.new_path);
5193                worktree
5194                    .as_local_mut()
5195                    .unwrap()
5196                    .copy_entry(entry_id, new_path, cx)
5197                    .ok_or_else(|| anyhow!("invalid entry"))
5198            })?
5199            .await?;
5200        Ok(proto::ProjectEntryResponse {
5201            entry: Some((&entry).into()),
5202            worktree_scan_id: worktree_scan_id as u64,
5203        })
5204    }
5205
5206    async fn handle_delete_project_entry(
5207        this: ModelHandle<Self>,
5208        envelope: TypedEnvelope<proto::DeleteProjectEntry>,
5209        _: Arc<Client>,
5210        mut cx: AsyncAppContext,
5211    ) -> Result<proto::ProjectEntryResponse> {
5212        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
5213        let worktree = this.read_with(&cx, |this, cx| {
5214            this.worktree_for_entry(entry_id, cx)
5215                .ok_or_else(|| anyhow!("worktree not found"))
5216        })?;
5217        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
5218        worktree
5219            .update(&mut cx, |worktree, cx| {
5220                worktree
5221                    .as_local_mut()
5222                    .unwrap()
5223                    .delete_entry(entry_id, cx)
5224                    .ok_or_else(|| anyhow!("invalid entry"))
5225            })?
5226            .await?;
5227        Ok(proto::ProjectEntryResponse {
5228            entry: None,
5229            worktree_scan_id: worktree_scan_id as u64,
5230        })
5231    }
5232
5233    async fn handle_update_diagnostic_summary(
5234        this: ModelHandle<Self>,
5235        envelope: TypedEnvelope<proto::UpdateDiagnosticSummary>,
5236        _: Arc<Client>,
5237        mut cx: AsyncAppContext,
5238    ) -> Result<()> {
5239        this.update(&mut cx, |this, cx| {
5240            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5241            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
5242                if let Some(summary) = envelope.payload.summary {
5243                    let project_path = ProjectPath {
5244                        worktree_id,
5245                        path: Path::new(&summary.path).into(),
5246                    };
5247                    worktree.update(cx, |worktree, _| {
5248                        worktree
5249                            .as_remote_mut()
5250                            .unwrap()
5251                            .update_diagnostic_summary(project_path.path.clone(), &summary);
5252                    });
5253                    cx.emit(Event::DiagnosticsUpdated {
5254                        language_server_id: LanguageServerId(summary.language_server_id as usize),
5255                        path: project_path,
5256                    });
5257                }
5258            }
5259            Ok(())
5260        })
5261    }
5262
5263    async fn handle_start_language_server(
5264        this: ModelHandle<Self>,
5265        envelope: TypedEnvelope<proto::StartLanguageServer>,
5266        _: Arc<Client>,
5267        mut cx: AsyncAppContext,
5268    ) -> Result<()> {
5269        let server = envelope
5270            .payload
5271            .server
5272            .ok_or_else(|| anyhow!("invalid server"))?;
5273        this.update(&mut cx, |this, cx| {
5274            this.language_server_statuses.insert(
5275                LanguageServerId(server.id as usize),
5276                LanguageServerStatus {
5277                    name: server.name,
5278                    pending_work: Default::default(),
5279                    has_pending_diagnostic_updates: false,
5280                    progress_tokens: Default::default(),
5281                },
5282            );
5283            cx.notify();
5284        });
5285        Ok(())
5286    }
5287
5288    async fn handle_update_language_server(
5289        this: ModelHandle<Self>,
5290        envelope: TypedEnvelope<proto::UpdateLanguageServer>,
5291        _: Arc<Client>,
5292        mut cx: AsyncAppContext,
5293    ) -> Result<()> {
5294        this.update(&mut cx, |this, cx| {
5295            let language_server_id = LanguageServerId(envelope.payload.language_server_id as usize);
5296
5297            match envelope
5298                .payload
5299                .variant
5300                .ok_or_else(|| anyhow!("invalid variant"))?
5301            {
5302                proto::update_language_server::Variant::WorkStart(payload) => {
5303                    this.on_lsp_work_start(
5304                        language_server_id,
5305                        payload.token,
5306                        LanguageServerProgress {
5307                            message: payload.message,
5308                            percentage: payload.percentage.map(|p| p as usize),
5309                            last_update_at: Instant::now(),
5310                        },
5311                        cx,
5312                    );
5313                }
5314
5315                proto::update_language_server::Variant::WorkProgress(payload) => {
5316                    this.on_lsp_work_progress(
5317                        language_server_id,
5318                        payload.token,
5319                        LanguageServerProgress {
5320                            message: payload.message,
5321                            percentage: payload.percentage.map(|p| p as usize),
5322                            last_update_at: Instant::now(),
5323                        },
5324                        cx,
5325                    );
5326                }
5327
5328                proto::update_language_server::Variant::WorkEnd(payload) => {
5329                    this.on_lsp_work_end(language_server_id, payload.token, cx);
5330                }
5331
5332                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(_) => {
5333                    this.disk_based_diagnostics_started(language_server_id, cx);
5334                }
5335
5336                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(_) => {
5337                    this.disk_based_diagnostics_finished(language_server_id, cx)
5338                }
5339            }
5340
5341            Ok(())
5342        })
5343    }
5344
5345    async fn handle_update_buffer(
5346        this: ModelHandle<Self>,
5347        envelope: TypedEnvelope<proto::UpdateBuffer>,
5348        _: Arc<Client>,
5349        mut cx: AsyncAppContext,
5350    ) -> Result<proto::Ack> {
5351        this.update(&mut cx, |this, cx| {
5352            let payload = envelope.payload.clone();
5353            let buffer_id = payload.buffer_id;
5354            let ops = payload
5355                .operations
5356                .into_iter()
5357                .map(language::proto::deserialize_operation)
5358                .collect::<Result<Vec<_>, _>>()?;
5359            let is_remote = this.is_remote();
5360            match this.opened_buffers.entry(buffer_id) {
5361                hash_map::Entry::Occupied(mut e) => match e.get_mut() {
5362                    OpenBuffer::Strong(buffer) => {
5363                        buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx))?;
5364                    }
5365                    OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
5366                    OpenBuffer::Weak(_) => {}
5367                },
5368                hash_map::Entry::Vacant(e) => {
5369                    assert!(
5370                        is_remote,
5371                        "received buffer update from {:?}",
5372                        envelope.original_sender_id
5373                    );
5374                    e.insert(OpenBuffer::Operations(ops));
5375                }
5376            }
5377            Ok(proto::Ack {})
5378        })
5379    }
5380
5381    async fn handle_create_buffer_for_peer(
5382        this: ModelHandle<Self>,
5383        envelope: TypedEnvelope<proto::CreateBufferForPeer>,
5384        _: Arc<Client>,
5385        mut cx: AsyncAppContext,
5386    ) -> Result<()> {
5387        this.update(&mut cx, |this, cx| {
5388            match envelope
5389                .payload
5390                .variant
5391                .ok_or_else(|| anyhow!("missing variant"))?
5392            {
5393                proto::create_buffer_for_peer::Variant::State(mut state) => {
5394                    let mut buffer_file = None;
5395                    if let Some(file) = state.file.take() {
5396                        let worktree_id = WorktreeId::from_proto(file.worktree_id);
5397                        let worktree = this.worktree_for_id(worktree_id, cx).ok_or_else(|| {
5398                            anyhow!("no worktree found for id {}", file.worktree_id)
5399                        })?;
5400                        buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
5401                            as Arc<dyn language::File>);
5402                    }
5403
5404                    let buffer_id = state.id;
5405                    let buffer = cx.add_model(|_| {
5406                        Buffer::from_proto(this.replica_id(), state, buffer_file).unwrap()
5407                    });
5408                    this.incomplete_remote_buffers
5409                        .insert(buffer_id, Some(buffer));
5410                }
5411                proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
5412                    let buffer = this
5413                        .incomplete_remote_buffers
5414                        .get(&chunk.buffer_id)
5415                        .cloned()
5416                        .flatten()
5417                        .ok_or_else(|| {
5418                            anyhow!(
5419                                "received chunk for buffer {} without initial state",
5420                                chunk.buffer_id
5421                            )
5422                        })?;
5423                    let operations = chunk
5424                        .operations
5425                        .into_iter()
5426                        .map(language::proto::deserialize_operation)
5427                        .collect::<Result<Vec<_>>>()?;
5428                    buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?;
5429
5430                    if chunk.is_last {
5431                        this.incomplete_remote_buffers.remove(&chunk.buffer_id);
5432                        this.register_buffer(&buffer, cx)?;
5433                    }
5434                }
5435            }
5436
5437            Ok(())
5438        })
5439    }
5440
5441    async fn handle_update_diff_base(
5442        this: ModelHandle<Self>,
5443        envelope: TypedEnvelope<proto::UpdateDiffBase>,
5444        _: Arc<Client>,
5445        mut cx: AsyncAppContext,
5446    ) -> Result<()> {
5447        this.update(&mut cx, |this, cx| {
5448            let buffer_id = envelope.payload.buffer_id;
5449            let diff_base = envelope.payload.diff_base;
5450            if let Some(buffer) = this
5451                .opened_buffers
5452                .get_mut(&buffer_id)
5453                .and_then(|b| b.upgrade(cx))
5454                .or_else(|| {
5455                    this.incomplete_remote_buffers
5456                        .get(&buffer_id)
5457                        .cloned()
5458                        .flatten()
5459                })
5460            {
5461                buffer.update(cx, |buffer, cx| buffer.set_diff_base(diff_base, cx));
5462            }
5463            Ok(())
5464        })
5465    }
5466
5467    async fn handle_update_buffer_file(
5468        this: ModelHandle<Self>,
5469        envelope: TypedEnvelope<proto::UpdateBufferFile>,
5470        _: Arc<Client>,
5471        mut cx: AsyncAppContext,
5472    ) -> Result<()> {
5473        let buffer_id = envelope.payload.buffer_id;
5474
5475        this.update(&mut cx, |this, cx| {
5476            let payload = envelope.payload.clone();
5477            if let Some(buffer) = this
5478                .opened_buffers
5479                .get(&buffer_id)
5480                .and_then(|b| b.upgrade(cx))
5481                .or_else(|| {
5482                    this.incomplete_remote_buffers
5483                        .get(&buffer_id)
5484                        .cloned()
5485                        .flatten()
5486                })
5487            {
5488                let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
5489                let worktree = this
5490                    .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
5491                    .ok_or_else(|| anyhow!("no such worktree"))?;
5492                let file = File::from_proto(file, worktree, cx)?;
5493                buffer.update(cx, |buffer, cx| {
5494                    buffer.file_updated(Arc::new(file), cx).detach();
5495                });
5496                this.detect_language_for_buffer(&buffer, cx);
5497            }
5498            Ok(())
5499        })
5500    }
5501
5502    async fn handle_save_buffer(
5503        this: ModelHandle<Self>,
5504        envelope: TypedEnvelope<proto::SaveBuffer>,
5505        _: Arc<Client>,
5506        mut cx: AsyncAppContext,
5507    ) -> Result<proto::BufferSaved> {
5508        let buffer_id = envelope.payload.buffer_id;
5509        let (project_id, buffer) = this.update(&mut cx, |this, cx| {
5510            let project_id = this.remote_id().ok_or_else(|| anyhow!("not connected"))?;
5511            let buffer = this
5512                .opened_buffers
5513                .get(&buffer_id)
5514                .and_then(|buffer| buffer.upgrade(cx))
5515                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?;
5516            anyhow::Ok((project_id, buffer))
5517        })?;
5518        buffer
5519            .update(&mut cx, |buffer, _| {
5520                buffer.wait_for_version(deserialize_version(&envelope.payload.version))
5521            })
5522            .await?;
5523        let buffer_id = buffer.read_with(&cx, |buffer, _| buffer.remote_id());
5524
5525        let (saved_version, fingerprint, mtime) = this
5526            .update(&mut cx, |this, cx| this.save_buffer(buffer, cx))
5527            .await?;
5528        Ok(proto::BufferSaved {
5529            project_id,
5530            buffer_id,
5531            version: serialize_version(&saved_version),
5532            mtime: Some(mtime.into()),
5533            fingerprint: language::proto::serialize_fingerprint(fingerprint),
5534        })
5535    }
5536
5537    async fn handle_reload_buffers(
5538        this: ModelHandle<Self>,
5539        envelope: TypedEnvelope<proto::ReloadBuffers>,
5540        _: Arc<Client>,
5541        mut cx: AsyncAppContext,
5542    ) -> Result<proto::ReloadBuffersResponse> {
5543        let sender_id = envelope.original_sender_id()?;
5544        let reload = this.update(&mut cx, |this, cx| {
5545            let mut buffers = HashSet::default();
5546            for buffer_id in &envelope.payload.buffer_ids {
5547                buffers.insert(
5548                    this.opened_buffers
5549                        .get(buffer_id)
5550                        .and_then(|buffer| buffer.upgrade(cx))
5551                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5552                );
5553            }
5554            Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
5555        })?;
5556
5557        let project_transaction = reload.await?;
5558        let project_transaction = this.update(&mut cx, |this, cx| {
5559            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5560        });
5561        Ok(proto::ReloadBuffersResponse {
5562            transaction: Some(project_transaction),
5563        })
5564    }
5565
5566    async fn handle_synchronize_buffers(
5567        this: ModelHandle<Self>,
5568        envelope: TypedEnvelope<proto::SynchronizeBuffers>,
5569        _: Arc<Client>,
5570        mut cx: AsyncAppContext,
5571    ) -> Result<proto::SynchronizeBuffersResponse> {
5572        let project_id = envelope.payload.project_id;
5573        let mut response = proto::SynchronizeBuffersResponse {
5574            buffers: Default::default(),
5575        };
5576
5577        this.update(&mut cx, |this, cx| {
5578            let Some(guest_id) = envelope.original_sender_id else {
5579                log::error!("missing original_sender_id on SynchronizeBuffers request");
5580                return;
5581            };
5582
5583            this.shared_buffers.entry(guest_id).or_default().clear();
5584            for buffer in envelope.payload.buffers {
5585                let buffer_id = buffer.id;
5586                let remote_version = language::proto::deserialize_version(&buffer.version);
5587                if let Some(buffer) = this.buffer_for_id(buffer_id, cx) {
5588                    this.shared_buffers
5589                        .entry(guest_id)
5590                        .or_default()
5591                        .insert(buffer_id);
5592
5593                    let buffer = buffer.read(cx);
5594                    response.buffers.push(proto::BufferVersion {
5595                        id: buffer_id,
5596                        version: language::proto::serialize_version(&buffer.version),
5597                    });
5598
5599                    let operations = buffer.serialize_ops(Some(remote_version), cx);
5600                    let client = this.client.clone();
5601                    if let Some(file) = buffer.file() {
5602                        client
5603                            .send(proto::UpdateBufferFile {
5604                                project_id,
5605                                buffer_id: buffer_id as u64,
5606                                file: Some(file.to_proto()),
5607                            })
5608                            .log_err();
5609                    }
5610
5611                    client
5612                        .send(proto::UpdateDiffBase {
5613                            project_id,
5614                            buffer_id: buffer_id as u64,
5615                            diff_base: buffer.diff_base().map(Into::into),
5616                        })
5617                        .log_err();
5618
5619                    client
5620                        .send(proto::BufferReloaded {
5621                            project_id,
5622                            buffer_id,
5623                            version: language::proto::serialize_version(buffer.saved_version()),
5624                            mtime: Some(buffer.saved_mtime().into()),
5625                            fingerprint: language::proto::serialize_fingerprint(
5626                                buffer.saved_version_fingerprint(),
5627                            ),
5628                            line_ending: language::proto::serialize_line_ending(
5629                                buffer.line_ending(),
5630                            ) as i32,
5631                        })
5632                        .log_err();
5633
5634                    cx.background()
5635                        .spawn(
5636                            async move {
5637                                let operations = operations.await;
5638                                for chunk in split_operations(operations) {
5639                                    client
5640                                        .request(proto::UpdateBuffer {
5641                                            project_id,
5642                                            buffer_id,
5643                                            operations: chunk,
5644                                        })
5645                                        .await?;
5646                                }
5647                                anyhow::Ok(())
5648                            }
5649                            .log_err(),
5650                        )
5651                        .detach();
5652                }
5653            }
5654        });
5655
5656        Ok(response)
5657    }
5658
5659    async fn handle_format_buffers(
5660        this: ModelHandle<Self>,
5661        envelope: TypedEnvelope<proto::FormatBuffers>,
5662        _: Arc<Client>,
5663        mut cx: AsyncAppContext,
5664    ) -> Result<proto::FormatBuffersResponse> {
5665        let sender_id = envelope.original_sender_id()?;
5666        let format = this.update(&mut cx, |this, cx| {
5667            let mut buffers = HashSet::default();
5668            for buffer_id in &envelope.payload.buffer_ids {
5669                buffers.insert(
5670                    this.opened_buffers
5671                        .get(buffer_id)
5672                        .and_then(|buffer| buffer.upgrade(cx))
5673                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
5674                );
5675            }
5676            let trigger = FormatTrigger::from_proto(envelope.payload.trigger);
5677            Ok::<_, anyhow::Error>(this.format(buffers, false, trigger, cx))
5678        })?;
5679
5680        let project_transaction = format.await?;
5681        let project_transaction = this.update(&mut cx, |this, cx| {
5682            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5683        });
5684        Ok(proto::FormatBuffersResponse {
5685            transaction: Some(project_transaction),
5686        })
5687    }
5688
5689    async fn handle_apply_additional_edits_for_completion(
5690        this: ModelHandle<Self>,
5691        envelope: TypedEnvelope<proto::ApplyCompletionAdditionalEdits>,
5692        _: Arc<Client>,
5693        mut cx: AsyncAppContext,
5694    ) -> Result<proto::ApplyCompletionAdditionalEditsResponse> {
5695        let (buffer, completion) = this.update(&mut cx, |this, cx| {
5696            let buffer = this
5697                .opened_buffers
5698                .get(&envelope.payload.buffer_id)
5699                .and_then(|buffer| buffer.upgrade(cx))
5700                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5701            let language = buffer.read(cx).language();
5702            let completion = language::proto::deserialize_completion(
5703                envelope
5704                    .payload
5705                    .completion
5706                    .ok_or_else(|| anyhow!("invalid completion"))?,
5707                language.cloned(),
5708            );
5709            Ok::<_, anyhow::Error>((buffer, completion))
5710        })?;
5711
5712        let completion = completion.await?;
5713
5714        let apply_additional_edits = this.update(&mut cx, |this, cx| {
5715            this.apply_additional_edits_for_completion(buffer, completion, false, cx)
5716        });
5717
5718        Ok(proto::ApplyCompletionAdditionalEditsResponse {
5719            transaction: apply_additional_edits
5720                .await?
5721                .as_ref()
5722                .map(language::proto::serialize_transaction),
5723        })
5724    }
5725
5726    async fn handle_apply_code_action(
5727        this: ModelHandle<Self>,
5728        envelope: TypedEnvelope<proto::ApplyCodeAction>,
5729        _: Arc<Client>,
5730        mut cx: AsyncAppContext,
5731    ) -> Result<proto::ApplyCodeActionResponse> {
5732        let sender_id = envelope.original_sender_id()?;
5733        let action = language::proto::deserialize_code_action(
5734            envelope
5735                .payload
5736                .action
5737                .ok_or_else(|| anyhow!("invalid action"))?,
5738        )?;
5739        let apply_code_action = this.update(&mut cx, |this, cx| {
5740            let buffer = this
5741                .opened_buffers
5742                .get(&envelope.payload.buffer_id)
5743                .and_then(|buffer| buffer.upgrade(cx))
5744                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
5745            Ok::<_, anyhow::Error>(this.apply_code_action(buffer, action, false, cx))
5746        })?;
5747
5748        let project_transaction = apply_code_action.await?;
5749        let project_transaction = this.update(&mut cx, |this, cx| {
5750            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
5751        });
5752        Ok(proto::ApplyCodeActionResponse {
5753            transaction: Some(project_transaction),
5754        })
5755    }
5756
5757    async fn handle_lsp_command<T: LspCommand>(
5758        this: ModelHandle<Self>,
5759        envelope: TypedEnvelope<T::ProtoRequest>,
5760        _: Arc<Client>,
5761        mut cx: AsyncAppContext,
5762    ) -> Result<<T::ProtoRequest as proto::RequestMessage>::Response>
5763    where
5764        <T::LspRequest as lsp::request::Request>::Result: Send,
5765    {
5766        let sender_id = envelope.original_sender_id()?;
5767        let buffer_id = T::buffer_id_from_proto(&envelope.payload);
5768        let buffer_handle = this.read_with(&cx, |this, _| {
5769            this.opened_buffers
5770                .get(&buffer_id)
5771                .and_then(|buffer| buffer.upgrade(&cx))
5772                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
5773        })?;
5774        let request = T::from_proto(
5775            envelope.payload,
5776            this.clone(),
5777            buffer_handle.clone(),
5778            cx.clone(),
5779        )
5780        .await?;
5781        let buffer_version = buffer_handle.read_with(&cx, |buffer, _| buffer.version());
5782        let response = this
5783            .update(&mut cx, |this, cx| {
5784                this.request_lsp(buffer_handle, request, cx)
5785            })
5786            .await?;
5787        this.update(&mut cx, |this, cx| {
5788            Ok(T::response_to_proto(
5789                response,
5790                this,
5791                sender_id,
5792                &buffer_version,
5793                cx,
5794            ))
5795        })
5796    }
5797
5798    async fn handle_get_project_symbols(
5799        this: ModelHandle<Self>,
5800        envelope: TypedEnvelope<proto::GetProjectSymbols>,
5801        _: Arc<Client>,
5802        mut cx: AsyncAppContext,
5803    ) -> Result<proto::GetProjectSymbolsResponse> {
5804        let symbols = this
5805            .update(&mut cx, |this, cx| {
5806                this.symbols(&envelope.payload.query, cx)
5807            })
5808            .await?;
5809
5810        Ok(proto::GetProjectSymbolsResponse {
5811            symbols: symbols.iter().map(serialize_symbol).collect(),
5812        })
5813    }
5814
5815    async fn handle_search_project(
5816        this: ModelHandle<Self>,
5817        envelope: TypedEnvelope<proto::SearchProject>,
5818        _: Arc<Client>,
5819        mut cx: AsyncAppContext,
5820    ) -> Result<proto::SearchProjectResponse> {
5821        let peer_id = envelope.original_sender_id()?;
5822        let query = SearchQuery::from_proto(envelope.payload)?;
5823        let result = this
5824            .update(&mut cx, |this, cx| this.search(query, cx))
5825            .await?;
5826
5827        this.update(&mut cx, |this, cx| {
5828            let mut locations = Vec::new();
5829            for (buffer, ranges) in result {
5830                for range in ranges {
5831                    let start = serialize_anchor(&range.start);
5832                    let end = serialize_anchor(&range.end);
5833                    let buffer_id = this.create_buffer_for_peer(&buffer, peer_id, cx);
5834                    locations.push(proto::Location {
5835                        buffer_id,
5836                        start: Some(start),
5837                        end: Some(end),
5838                    });
5839                }
5840            }
5841            Ok(proto::SearchProjectResponse { locations })
5842        })
5843    }
5844
5845    async fn handle_open_buffer_for_symbol(
5846        this: ModelHandle<Self>,
5847        envelope: TypedEnvelope<proto::OpenBufferForSymbol>,
5848        _: Arc<Client>,
5849        mut cx: AsyncAppContext,
5850    ) -> Result<proto::OpenBufferForSymbolResponse> {
5851        let peer_id = envelope.original_sender_id()?;
5852        let symbol = envelope
5853            .payload
5854            .symbol
5855            .ok_or_else(|| anyhow!("invalid symbol"))?;
5856        let symbol = this
5857            .read_with(&cx, |this, _| this.deserialize_symbol(symbol))
5858            .await?;
5859        let symbol = this.read_with(&cx, |this, _| {
5860            let signature = this.symbol_signature(&symbol.path);
5861            if signature == symbol.signature {
5862                Ok(symbol)
5863            } else {
5864                Err(anyhow!("invalid symbol signature"))
5865            }
5866        })?;
5867        let buffer = this
5868            .update(&mut cx, |this, cx| this.open_buffer_for_symbol(&symbol, cx))
5869            .await?;
5870
5871        Ok(proto::OpenBufferForSymbolResponse {
5872            buffer_id: this.update(&mut cx, |this, cx| {
5873                this.create_buffer_for_peer(&buffer, peer_id, cx)
5874            }),
5875        })
5876    }
5877
5878    fn symbol_signature(&self, project_path: &ProjectPath) -> [u8; 32] {
5879        let mut hasher = Sha256::new();
5880        hasher.update(project_path.worktree_id.to_proto().to_be_bytes());
5881        hasher.update(project_path.path.to_string_lossy().as_bytes());
5882        hasher.update(self.nonce.to_be_bytes());
5883        hasher.finalize().as_slice().try_into().unwrap()
5884    }
5885
5886    async fn handle_open_buffer_by_id(
5887        this: ModelHandle<Self>,
5888        envelope: TypedEnvelope<proto::OpenBufferById>,
5889        _: Arc<Client>,
5890        mut cx: AsyncAppContext,
5891    ) -> Result<proto::OpenBufferResponse> {
5892        let peer_id = envelope.original_sender_id()?;
5893        let buffer = this
5894            .update(&mut cx, |this, cx| {
5895                this.open_buffer_by_id(envelope.payload.id, cx)
5896            })
5897            .await?;
5898        this.update(&mut cx, |this, cx| {
5899            Ok(proto::OpenBufferResponse {
5900                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5901            })
5902        })
5903    }
5904
5905    async fn handle_open_buffer_by_path(
5906        this: ModelHandle<Self>,
5907        envelope: TypedEnvelope<proto::OpenBufferByPath>,
5908        _: Arc<Client>,
5909        mut cx: AsyncAppContext,
5910    ) -> Result<proto::OpenBufferResponse> {
5911        let peer_id = envelope.original_sender_id()?;
5912        let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
5913        let open_buffer = this.update(&mut cx, |this, cx| {
5914            this.open_buffer(
5915                ProjectPath {
5916                    worktree_id,
5917                    path: PathBuf::from(envelope.payload.path).into(),
5918                },
5919                cx,
5920            )
5921        });
5922
5923        let buffer = open_buffer.await?;
5924        this.update(&mut cx, |this, cx| {
5925            Ok(proto::OpenBufferResponse {
5926                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
5927            })
5928        })
5929    }
5930
5931    fn serialize_project_transaction_for_peer(
5932        &mut self,
5933        project_transaction: ProjectTransaction,
5934        peer_id: proto::PeerId,
5935        cx: &mut AppContext,
5936    ) -> proto::ProjectTransaction {
5937        let mut serialized_transaction = proto::ProjectTransaction {
5938            buffer_ids: Default::default(),
5939            transactions: Default::default(),
5940        };
5941        for (buffer, transaction) in project_transaction.0 {
5942            serialized_transaction
5943                .buffer_ids
5944                .push(self.create_buffer_for_peer(&buffer, peer_id, cx));
5945            serialized_transaction
5946                .transactions
5947                .push(language::proto::serialize_transaction(&transaction));
5948        }
5949        serialized_transaction
5950    }
5951
5952    fn deserialize_project_transaction(
5953        &mut self,
5954        message: proto::ProjectTransaction,
5955        push_to_history: bool,
5956        cx: &mut ModelContext<Self>,
5957    ) -> Task<Result<ProjectTransaction>> {
5958        cx.spawn(|this, mut cx| async move {
5959            let mut project_transaction = ProjectTransaction::default();
5960            for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
5961            {
5962                let buffer = this
5963                    .update(&mut cx, |this, cx| {
5964                        this.wait_for_remote_buffer(buffer_id, cx)
5965                    })
5966                    .await?;
5967                let transaction = language::proto::deserialize_transaction(transaction)?;
5968                project_transaction.0.insert(buffer, transaction);
5969            }
5970
5971            for (buffer, transaction) in &project_transaction.0 {
5972                buffer
5973                    .update(&mut cx, |buffer, _| {
5974                        buffer.wait_for_edits(transaction.edit_ids.iter().copied())
5975                    })
5976                    .await?;
5977
5978                if push_to_history {
5979                    buffer.update(&mut cx, |buffer, _| {
5980                        buffer.push_transaction(transaction.clone(), Instant::now());
5981                    });
5982                }
5983            }
5984
5985            Ok(project_transaction)
5986        })
5987    }
5988
5989    fn create_buffer_for_peer(
5990        &mut self,
5991        buffer: &ModelHandle<Buffer>,
5992        peer_id: proto::PeerId,
5993        cx: &mut AppContext,
5994    ) -> u64 {
5995        let buffer_id = buffer.read(cx).remote_id();
5996        if let Some(ProjectClientState::Local { updates_tx, .. }) = &self.client_state {
5997            updates_tx
5998                .unbounded_send(LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id })
5999                .ok();
6000        }
6001        buffer_id
6002    }
6003
6004    fn wait_for_remote_buffer(
6005        &mut self,
6006        id: u64,
6007        cx: &mut ModelContext<Self>,
6008    ) -> Task<Result<ModelHandle<Buffer>>> {
6009        let mut opened_buffer_rx = self.opened_buffer.1.clone();
6010
6011        cx.spawn_weak(|this, mut cx| async move {
6012            let buffer = loop {
6013                let Some(this) = this.upgrade(&cx) else {
6014                    return Err(anyhow!("project dropped"));
6015                };
6016                let buffer = this.read_with(&cx, |this, cx| {
6017                    this.opened_buffers
6018                        .get(&id)
6019                        .and_then(|buffer| buffer.upgrade(cx))
6020                });
6021                if let Some(buffer) = buffer {
6022                    break buffer;
6023                } else if this.read_with(&cx, |this, _| this.is_read_only()) {
6024                    return Err(anyhow!("disconnected before buffer {} could be opened", id));
6025                }
6026
6027                this.update(&mut cx, |this, _| {
6028                    this.incomplete_remote_buffers.entry(id).or_default();
6029                });
6030                drop(this);
6031                opened_buffer_rx
6032                    .next()
6033                    .await
6034                    .ok_or_else(|| anyhow!("project dropped while waiting for buffer"))?;
6035            };
6036            buffer.update(&mut cx, |buffer, cx| buffer.git_diff_recalc(cx));
6037            Ok(buffer)
6038        })
6039    }
6040
6041    fn synchronize_remote_buffers(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
6042        let project_id = match self.client_state.as_ref() {
6043            Some(ProjectClientState::Remote {
6044                sharing_has_stopped,
6045                remote_id,
6046                ..
6047            }) => {
6048                if *sharing_has_stopped {
6049                    return Task::ready(Err(anyhow!(
6050                        "can't synchronize remote buffers on a readonly project"
6051                    )));
6052                } else {
6053                    *remote_id
6054                }
6055            }
6056            Some(ProjectClientState::Local { .. }) | None => {
6057                return Task::ready(Err(anyhow!(
6058                    "can't synchronize remote buffers on a local project"
6059                )))
6060            }
6061        };
6062
6063        let client = self.client.clone();
6064        cx.spawn(|this, cx| async move {
6065            let (buffers, incomplete_buffer_ids) = this.read_with(&cx, |this, cx| {
6066                let buffers = this
6067                    .opened_buffers
6068                    .iter()
6069                    .filter_map(|(id, buffer)| {
6070                        let buffer = buffer.upgrade(cx)?;
6071                        Some(proto::BufferVersion {
6072                            id: *id,
6073                            version: language::proto::serialize_version(&buffer.read(cx).version),
6074                        })
6075                    })
6076                    .collect();
6077                let incomplete_buffer_ids = this
6078                    .incomplete_remote_buffers
6079                    .keys()
6080                    .copied()
6081                    .collect::<Vec<_>>();
6082
6083                (buffers, incomplete_buffer_ids)
6084            });
6085            let response = client
6086                .request(proto::SynchronizeBuffers {
6087                    project_id,
6088                    buffers,
6089                })
6090                .await?;
6091
6092            let send_updates_for_buffers = response.buffers.into_iter().map(|buffer| {
6093                let client = client.clone();
6094                let buffer_id = buffer.id;
6095                let remote_version = language::proto::deserialize_version(&buffer.version);
6096                this.read_with(&cx, |this, cx| {
6097                    if let Some(buffer) = this.buffer_for_id(buffer_id, cx) {
6098                        let operations = buffer.read(cx).serialize_ops(Some(remote_version), cx);
6099                        cx.background().spawn(async move {
6100                            let operations = operations.await;
6101                            for chunk in split_operations(operations) {
6102                                client
6103                                    .request(proto::UpdateBuffer {
6104                                        project_id,
6105                                        buffer_id,
6106                                        operations: chunk,
6107                                    })
6108                                    .await?;
6109                            }
6110                            anyhow::Ok(())
6111                        })
6112                    } else {
6113                        Task::ready(Ok(()))
6114                    }
6115                })
6116            });
6117
6118            // Any incomplete buffers have open requests waiting. Request that the host sends
6119            // creates these buffers for us again to unblock any waiting futures.
6120            for id in incomplete_buffer_ids {
6121                cx.background()
6122                    .spawn(client.request(proto::OpenBufferById { project_id, id }))
6123                    .detach();
6124            }
6125
6126            futures::future::join_all(send_updates_for_buffers)
6127                .await
6128                .into_iter()
6129                .collect()
6130        })
6131    }
6132
6133    pub fn worktree_metadata_protos(&self, cx: &AppContext) -> Vec<proto::WorktreeMetadata> {
6134        self.worktrees(cx)
6135            .map(|worktree| {
6136                let worktree = worktree.read(cx);
6137                proto::WorktreeMetadata {
6138                    id: worktree.id().to_proto(),
6139                    root_name: worktree.root_name().into(),
6140                    visible: worktree.is_visible(),
6141                    abs_path: worktree.abs_path().to_string_lossy().into(),
6142                }
6143            })
6144            .collect()
6145    }
6146
6147    fn set_worktrees_from_proto(
6148        &mut self,
6149        worktrees: Vec<proto::WorktreeMetadata>,
6150        cx: &mut ModelContext<Project>,
6151    ) -> Result<()> {
6152        let replica_id = self.replica_id();
6153        let remote_id = self.remote_id().ok_or_else(|| anyhow!("invalid project"))?;
6154
6155        let mut old_worktrees_by_id = self
6156            .worktrees
6157            .drain(..)
6158            .filter_map(|worktree| {
6159                let worktree = worktree.upgrade(cx)?;
6160                Some((worktree.read(cx).id(), worktree))
6161            })
6162            .collect::<HashMap<_, _>>();
6163
6164        for worktree in worktrees {
6165            if let Some(old_worktree) =
6166                old_worktrees_by_id.remove(&WorktreeId::from_proto(worktree.id))
6167            {
6168                self.worktrees.push(WorktreeHandle::Strong(old_worktree));
6169            } else {
6170                let worktree =
6171                    Worktree::remote(remote_id, replica_id, worktree, self.client.clone(), cx);
6172                let _ = self.add_worktree(&worktree, cx);
6173            }
6174        }
6175
6176        self.metadata_changed(cx);
6177        for (id, _) in old_worktrees_by_id {
6178            cx.emit(Event::WorktreeRemoved(id));
6179        }
6180
6181        Ok(())
6182    }
6183
6184    fn set_collaborators_from_proto(
6185        &mut self,
6186        messages: Vec<proto::Collaborator>,
6187        cx: &mut ModelContext<Self>,
6188    ) -> Result<()> {
6189        let mut collaborators = HashMap::default();
6190        for message in messages {
6191            let collaborator = Collaborator::from_proto(message)?;
6192            collaborators.insert(collaborator.peer_id, collaborator);
6193        }
6194        for old_peer_id in self.collaborators.keys() {
6195            if !collaborators.contains_key(old_peer_id) {
6196                cx.emit(Event::CollaboratorLeft(*old_peer_id));
6197            }
6198        }
6199        self.collaborators = collaborators;
6200        Ok(())
6201    }
6202
6203    fn deserialize_symbol(
6204        &self,
6205        serialized_symbol: proto::Symbol,
6206    ) -> impl Future<Output = Result<Symbol>> {
6207        let languages = self.languages.clone();
6208        async move {
6209            let source_worktree_id = WorktreeId::from_proto(serialized_symbol.source_worktree_id);
6210            let worktree_id = WorktreeId::from_proto(serialized_symbol.worktree_id);
6211            let start = serialized_symbol
6212                .start
6213                .ok_or_else(|| anyhow!("invalid start"))?;
6214            let end = serialized_symbol
6215                .end
6216                .ok_or_else(|| anyhow!("invalid end"))?;
6217            let kind = unsafe { mem::transmute(serialized_symbol.kind) };
6218            let path = ProjectPath {
6219                worktree_id,
6220                path: PathBuf::from(serialized_symbol.path).into(),
6221            };
6222            let language = languages
6223                .language_for_file(&path.path, None)
6224                .await
6225                .log_err();
6226            Ok(Symbol {
6227                language_server_name: LanguageServerName(
6228                    serialized_symbol.language_server_name.into(),
6229                ),
6230                source_worktree_id,
6231                path,
6232                label: {
6233                    match language {
6234                        Some(language) => {
6235                            language
6236                                .label_for_symbol(&serialized_symbol.name, kind)
6237                                .await
6238                        }
6239                        None => None,
6240                    }
6241                    .unwrap_or_else(|| CodeLabel::plain(serialized_symbol.name.clone(), None))
6242                },
6243
6244                name: serialized_symbol.name,
6245                range: Unclipped(PointUtf16::new(start.row, start.column))
6246                    ..Unclipped(PointUtf16::new(end.row, end.column)),
6247                kind,
6248                signature: serialized_symbol
6249                    .signature
6250                    .try_into()
6251                    .map_err(|_| anyhow!("invalid signature"))?,
6252            })
6253        }
6254    }
6255
6256    async fn handle_buffer_saved(
6257        this: ModelHandle<Self>,
6258        envelope: TypedEnvelope<proto::BufferSaved>,
6259        _: Arc<Client>,
6260        mut cx: AsyncAppContext,
6261    ) -> Result<()> {
6262        let fingerprint = deserialize_fingerprint(&envelope.payload.fingerprint)?;
6263        let version = deserialize_version(&envelope.payload.version);
6264        let mtime = envelope
6265            .payload
6266            .mtime
6267            .ok_or_else(|| anyhow!("missing mtime"))?
6268            .into();
6269
6270        this.update(&mut cx, |this, cx| {
6271            let buffer = this
6272                .opened_buffers
6273                .get(&envelope.payload.buffer_id)
6274                .and_then(|buffer| buffer.upgrade(cx))
6275                .or_else(|| {
6276                    this.incomplete_remote_buffers
6277                        .get(&envelope.payload.buffer_id)
6278                        .and_then(|b| b.clone())
6279                });
6280            if let Some(buffer) = buffer {
6281                buffer.update(cx, |buffer, cx| {
6282                    buffer.did_save(version, fingerprint, mtime, cx);
6283                });
6284            }
6285            Ok(())
6286        })
6287    }
6288
6289    async fn handle_buffer_reloaded(
6290        this: ModelHandle<Self>,
6291        envelope: TypedEnvelope<proto::BufferReloaded>,
6292        _: Arc<Client>,
6293        mut cx: AsyncAppContext,
6294    ) -> Result<()> {
6295        let payload = envelope.payload;
6296        let version = deserialize_version(&payload.version);
6297        let fingerprint = deserialize_fingerprint(&payload.fingerprint)?;
6298        let line_ending = deserialize_line_ending(
6299            proto::LineEnding::from_i32(payload.line_ending)
6300                .ok_or_else(|| anyhow!("missing line ending"))?,
6301        );
6302        let mtime = payload
6303            .mtime
6304            .ok_or_else(|| anyhow!("missing mtime"))?
6305            .into();
6306        this.update(&mut cx, |this, cx| {
6307            let buffer = this
6308                .opened_buffers
6309                .get(&payload.buffer_id)
6310                .and_then(|buffer| buffer.upgrade(cx))
6311                .or_else(|| {
6312                    this.incomplete_remote_buffers
6313                        .get(&payload.buffer_id)
6314                        .cloned()
6315                        .flatten()
6316                });
6317            if let Some(buffer) = buffer {
6318                buffer.update(cx, |buffer, cx| {
6319                    buffer.did_reload(version, fingerprint, line_ending, mtime, cx);
6320                });
6321            }
6322            Ok(())
6323        })
6324    }
6325
6326    #[allow(clippy::type_complexity)]
6327    fn edits_from_lsp(
6328        &mut self,
6329        buffer: &ModelHandle<Buffer>,
6330        lsp_edits: impl 'static + Send + IntoIterator<Item = lsp::TextEdit>,
6331        server_id: LanguageServerId,
6332        version: Option<i32>,
6333        cx: &mut ModelContext<Self>,
6334    ) -> Task<Result<Vec<(Range<Anchor>, String)>>> {
6335        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx);
6336        cx.background().spawn(async move {
6337            let snapshot = snapshot?;
6338            let mut lsp_edits = lsp_edits
6339                .into_iter()
6340                .map(|edit| (range_from_lsp(edit.range), edit.new_text))
6341                .collect::<Vec<_>>();
6342            lsp_edits.sort_by_key(|(range, _)| range.start);
6343
6344            let mut lsp_edits = lsp_edits.into_iter().peekable();
6345            let mut edits = Vec::new();
6346            while let Some((range, mut new_text)) = lsp_edits.next() {
6347                // Clip invalid ranges provided by the language server.
6348                let mut range = snapshot.clip_point_utf16(range.start, Bias::Left)
6349                    ..snapshot.clip_point_utf16(range.end, Bias::Left);
6350
6351                // Combine any LSP edits that are adjacent.
6352                //
6353                // Also, combine LSP edits that are separated from each other by only
6354                // a newline. This is important because for some code actions,
6355                // Rust-analyzer rewrites the entire buffer via a series of edits that
6356                // are separated by unchanged newline characters.
6357                //
6358                // In order for the diffing logic below to work properly, any edits that
6359                // cancel each other out must be combined into one.
6360                while let Some((next_range, next_text)) = lsp_edits.peek() {
6361                    if next_range.start.0 > range.end {
6362                        if next_range.start.0.row > range.end.row + 1
6363                            || next_range.start.0.column > 0
6364                            || snapshot.clip_point_utf16(
6365                                Unclipped(PointUtf16::new(range.end.row, u32::MAX)),
6366                                Bias::Left,
6367                            ) > range.end
6368                        {
6369                            break;
6370                        }
6371                        new_text.push('\n');
6372                    }
6373                    range.end = snapshot.clip_point_utf16(next_range.end, Bias::Left);
6374                    new_text.push_str(next_text);
6375                    lsp_edits.next();
6376                }
6377
6378                // For multiline edits, perform a diff of the old and new text so that
6379                // we can identify the changes more precisely, preserving the locations
6380                // of any anchors positioned in the unchanged regions.
6381                if range.end.row > range.start.row {
6382                    let mut offset = range.start.to_offset(&snapshot);
6383                    let old_text = snapshot.text_for_range(range).collect::<String>();
6384
6385                    let diff = TextDiff::from_lines(old_text.as_str(), &new_text);
6386                    let mut moved_since_edit = true;
6387                    for change in diff.iter_all_changes() {
6388                        let tag = change.tag();
6389                        let value = change.value();
6390                        match tag {
6391                            ChangeTag::Equal => {
6392                                offset += value.len();
6393                                moved_since_edit = true;
6394                            }
6395                            ChangeTag::Delete => {
6396                                let start = snapshot.anchor_after(offset);
6397                                let end = snapshot.anchor_before(offset + value.len());
6398                                if moved_since_edit {
6399                                    edits.push((start..end, String::new()));
6400                                } else {
6401                                    edits.last_mut().unwrap().0.end = end;
6402                                }
6403                                offset += value.len();
6404                                moved_since_edit = false;
6405                            }
6406                            ChangeTag::Insert => {
6407                                if moved_since_edit {
6408                                    let anchor = snapshot.anchor_after(offset);
6409                                    edits.push((anchor..anchor, value.to_string()));
6410                                } else {
6411                                    edits.last_mut().unwrap().1.push_str(value);
6412                                }
6413                                moved_since_edit = false;
6414                            }
6415                        }
6416                    }
6417                } else if range.end == range.start {
6418                    let anchor = snapshot.anchor_after(range.start);
6419                    edits.push((anchor..anchor, new_text));
6420                } else {
6421                    let edit_start = snapshot.anchor_after(range.start);
6422                    let edit_end = snapshot.anchor_before(range.end);
6423                    edits.push((edit_start..edit_end, new_text));
6424                }
6425            }
6426
6427            Ok(edits)
6428        })
6429    }
6430
6431    fn buffer_snapshot_for_lsp_version(
6432        &mut self,
6433        buffer: &ModelHandle<Buffer>,
6434        server_id: LanguageServerId,
6435        version: Option<i32>,
6436        cx: &AppContext,
6437    ) -> Result<TextBufferSnapshot> {
6438        const OLD_VERSIONS_TO_RETAIN: i32 = 10;
6439
6440        if let Some(version) = version {
6441            let buffer_id = buffer.read(cx).remote_id();
6442            let snapshots = self
6443                .buffer_snapshots
6444                .get_mut(&buffer_id)
6445                .and_then(|m| m.get_mut(&server_id))
6446                .ok_or_else(|| {
6447                    anyhow!("no snapshots found for buffer {buffer_id} and server {server_id}")
6448                })?;
6449
6450            let found_snapshot = snapshots
6451                .binary_search_by_key(&version, |e| e.version)
6452                .map(|ix| snapshots[ix].snapshot.clone())
6453                .map_err(|_| {
6454                    anyhow!("snapshot not found for buffer {buffer_id} server {server_id} at version {version}")
6455                })?;
6456
6457            snapshots.retain(|snapshot| snapshot.version + OLD_VERSIONS_TO_RETAIN >= version);
6458            Ok(found_snapshot)
6459        } else {
6460            Ok((buffer.read(cx)).text_snapshot())
6461        }
6462    }
6463
6464    pub fn language_servers(
6465        &self,
6466    ) -> impl '_ + Iterator<Item = (LanguageServerId, LanguageServerName, WorktreeId)> {
6467        self.language_server_ids
6468            .iter()
6469            .map(|((worktree_id, server_name), server_id)| {
6470                (*server_id, server_name.clone(), *worktree_id)
6471            })
6472    }
6473
6474    pub fn language_server_for_id(&self, id: LanguageServerId) -> Option<Arc<LanguageServer>> {
6475        if let LanguageServerState::Running { server, .. } = self.language_servers.get(&id)? {
6476            Some(server.clone())
6477        } else {
6478            None
6479        }
6480    }
6481
6482    pub fn language_servers_for_buffer(
6483        &self,
6484        buffer: &Buffer,
6485        cx: &AppContext,
6486    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
6487        self.language_server_ids_for_buffer(buffer, cx)
6488            .into_iter()
6489            .filter_map(|server_id| {
6490                let server = self.language_servers.get(&server_id)?;
6491                if let LanguageServerState::Running {
6492                    adapter, server, ..
6493                } = server
6494                {
6495                    Some((adapter, server))
6496                } else {
6497                    None
6498                }
6499            })
6500    }
6501
6502    fn primary_language_servers_for_buffer(
6503        &self,
6504        buffer: &Buffer,
6505        cx: &AppContext,
6506    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
6507        self.language_servers_for_buffer(buffer, cx).next()
6508    }
6509
6510    fn language_server_for_buffer(
6511        &self,
6512        buffer: &Buffer,
6513        server_id: LanguageServerId,
6514        cx: &AppContext,
6515    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
6516        self.language_servers_for_buffer(buffer, cx)
6517            .find(|(_, s)| s.server_id() == server_id)
6518    }
6519
6520    fn language_server_ids_for_buffer(
6521        &self,
6522        buffer: &Buffer,
6523        cx: &AppContext,
6524    ) -> Vec<LanguageServerId> {
6525        if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language()) {
6526            let worktree_id = file.worktree_id(cx);
6527            language
6528                .lsp_adapters()
6529                .iter()
6530                .flat_map(|adapter| {
6531                    let key = (worktree_id, adapter.name.clone());
6532                    self.language_server_ids.get(&key).copied()
6533                })
6534                .collect()
6535        } else {
6536            Vec::new()
6537        }
6538    }
6539}
6540
6541impl WorktreeHandle {
6542    pub fn upgrade(&self, cx: &AppContext) -> Option<ModelHandle<Worktree>> {
6543        match self {
6544            WorktreeHandle::Strong(handle) => Some(handle.clone()),
6545            WorktreeHandle::Weak(handle) => handle.upgrade(cx),
6546        }
6547    }
6548}
6549
6550impl OpenBuffer {
6551    pub fn upgrade(&self, cx: &impl BorrowAppContext) -> Option<ModelHandle<Buffer>> {
6552        match self {
6553            OpenBuffer::Strong(handle) => Some(handle.clone()),
6554            OpenBuffer::Weak(handle) => handle.upgrade(cx),
6555            OpenBuffer::Operations(_) => None,
6556        }
6557    }
6558}
6559
6560pub struct PathMatchCandidateSet {
6561    pub snapshot: Snapshot,
6562    pub include_ignored: bool,
6563    pub include_root_name: bool,
6564}
6565
6566impl<'a> fuzzy::PathMatchCandidateSet<'a> for PathMatchCandidateSet {
6567    type Candidates = PathMatchCandidateSetIter<'a>;
6568
6569    fn id(&self) -> usize {
6570        self.snapshot.id().to_usize()
6571    }
6572
6573    fn len(&self) -> usize {
6574        if self.include_ignored {
6575            self.snapshot.file_count()
6576        } else {
6577            self.snapshot.visible_file_count()
6578        }
6579    }
6580
6581    fn prefix(&self) -> Arc<str> {
6582        if self.snapshot.root_entry().map_or(false, |e| e.is_file()) {
6583            self.snapshot.root_name().into()
6584        } else if self.include_root_name {
6585            format!("{}/", self.snapshot.root_name()).into()
6586        } else {
6587            "".into()
6588        }
6589    }
6590
6591    fn candidates(&'a self, start: usize) -> Self::Candidates {
6592        PathMatchCandidateSetIter {
6593            traversal: self.snapshot.files(self.include_ignored, start),
6594        }
6595    }
6596}
6597
6598pub struct PathMatchCandidateSetIter<'a> {
6599    traversal: Traversal<'a>,
6600}
6601
6602impl<'a> Iterator for PathMatchCandidateSetIter<'a> {
6603    type Item = fuzzy::PathMatchCandidate<'a>;
6604
6605    fn next(&mut self) -> Option<Self::Item> {
6606        self.traversal.next().map(|entry| {
6607            if let EntryKind::File(char_bag) = entry.kind {
6608                fuzzy::PathMatchCandidate {
6609                    path: &entry.path,
6610                    char_bag,
6611                }
6612            } else {
6613                unreachable!()
6614            }
6615        })
6616    }
6617}
6618
6619impl Entity for Project {
6620    type Event = Event;
6621
6622    fn release(&mut self, cx: &mut gpui::AppContext) {
6623        match &self.client_state {
6624            Some(ProjectClientState::Local { .. }) => {
6625                let _ = self.unshare_internal(cx);
6626            }
6627            Some(ProjectClientState::Remote { remote_id, .. }) => {
6628                let _ = self.client.send(proto::LeaveProject {
6629                    project_id: *remote_id,
6630                });
6631                self.disconnected_from_host_internal(cx);
6632            }
6633            _ => {}
6634        }
6635    }
6636
6637    fn app_will_quit(
6638        &mut self,
6639        _: &mut AppContext,
6640    ) -> Option<std::pin::Pin<Box<dyn 'static + Future<Output = ()>>>> {
6641        let shutdown_futures = self
6642            .language_servers
6643            .drain()
6644            .map(|(_, server_state)| async {
6645                match server_state {
6646                    LanguageServerState::Running { server, .. } => server.shutdown()?.await,
6647                    LanguageServerState::Starting(starting_server) => {
6648                        starting_server.await?.shutdown()?.await
6649                    }
6650                }
6651            })
6652            .collect::<Vec<_>>();
6653
6654        Some(
6655            async move {
6656                futures::future::join_all(shutdown_futures).await;
6657            }
6658            .boxed(),
6659        )
6660    }
6661}
6662
6663impl Collaborator {
6664    fn from_proto(message: proto::Collaborator) -> Result<Self> {
6665        Ok(Self {
6666            peer_id: message.peer_id.ok_or_else(|| anyhow!("invalid peer id"))?,
6667            replica_id: message.replica_id as ReplicaId,
6668        })
6669    }
6670}
6671
6672impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
6673    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
6674        Self {
6675            worktree_id,
6676            path: path.as_ref().into(),
6677        }
6678    }
6679}
6680
6681fn split_operations(
6682    mut operations: Vec<proto::Operation>,
6683) -> impl Iterator<Item = Vec<proto::Operation>> {
6684    #[cfg(any(test, feature = "test-support"))]
6685    const CHUNK_SIZE: usize = 5;
6686
6687    #[cfg(not(any(test, feature = "test-support")))]
6688    const CHUNK_SIZE: usize = 100;
6689
6690    let mut done = false;
6691    std::iter::from_fn(move || {
6692        if done {
6693            return None;
6694        }
6695
6696        let operations = operations
6697            .drain(..cmp::min(CHUNK_SIZE, operations.len()))
6698            .collect::<Vec<_>>();
6699        if operations.is_empty() {
6700            done = true;
6701        }
6702        Some(operations)
6703    })
6704}
6705
6706fn serialize_symbol(symbol: &Symbol) -> proto::Symbol {
6707    proto::Symbol {
6708        language_server_name: symbol.language_server_name.0.to_string(),
6709        source_worktree_id: symbol.source_worktree_id.to_proto(),
6710        worktree_id: symbol.path.worktree_id.to_proto(),
6711        path: symbol.path.path.to_string_lossy().to_string(),
6712        name: symbol.name.clone(),
6713        kind: unsafe { mem::transmute(symbol.kind) },
6714        start: Some(proto::PointUtf16 {
6715            row: symbol.range.start.0.row,
6716            column: symbol.range.start.0.column,
6717        }),
6718        end: Some(proto::PointUtf16 {
6719            row: symbol.range.end.0.row,
6720            column: symbol.range.end.0.column,
6721        }),
6722        signature: symbol.signature.to_vec(),
6723    }
6724}
6725
6726fn relativize_path(base: &Path, path: &Path) -> PathBuf {
6727    let mut path_components = path.components();
6728    let mut base_components = base.components();
6729    let mut components: Vec<Component> = Vec::new();
6730    loop {
6731        match (path_components.next(), base_components.next()) {
6732            (None, None) => break,
6733            (Some(a), None) => {
6734                components.push(a);
6735                components.extend(path_components.by_ref());
6736                break;
6737            }
6738            (None, _) => components.push(Component::ParentDir),
6739            (Some(a), Some(b)) if components.is_empty() && a == b => (),
6740            (Some(a), Some(b)) if b == Component::CurDir => components.push(a),
6741            (Some(a), Some(_)) => {
6742                components.push(Component::ParentDir);
6743                for _ in base_components {
6744                    components.push(Component::ParentDir);
6745                }
6746                components.push(a);
6747                components.extend(path_components.by_ref());
6748                break;
6749            }
6750        }
6751    }
6752    components.iter().map(|c| c.as_os_str()).collect()
6753}
6754
6755impl Item for Buffer {
6756    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
6757        File::from_dyn(self.file()).and_then(|file| file.project_entry_id(cx))
6758    }
6759
6760    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
6761        File::from_dyn(self.file()).map(|file| ProjectPath {
6762            worktree_id: file.worktree_id(cx),
6763            path: file.path().clone(),
6764        })
6765    }
6766}
6767
6768async fn pump_loading_buffer_reciever(
6769    mut receiver: postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
6770) -> Result<ModelHandle<Buffer>, Arc<anyhow::Error>> {
6771    loop {
6772        if let Some(result) = receiver.borrow().as_ref() {
6773            match result {
6774                Ok(buffer) => return Ok(buffer.to_owned()),
6775                Err(e) => return Err(e.to_owned()),
6776            }
6777        }
6778        receiver.next().await;
6779    }
6780}
6781
6782fn update_diff_base(
6783    project: &Project,
6784) -> impl Fn(Option<String>, ModelHandle<Buffer>, &mut AsyncAppContext) {
6785    let remote_id = project.remote_id();
6786    let client = project.client().clone();
6787    move |diff_base, buffer, cx| {
6788        let buffer_id = buffer.update(cx, |buffer, cx| {
6789            buffer.set_diff_base(diff_base.clone(), cx);
6790            buffer.remote_id()
6791        });
6792
6793        if let Some(project_id) = remote_id {
6794            client
6795                .send(proto::UpdateDiffBase {
6796                    project_id,
6797                    buffer_id: buffer_id as u64,
6798                    diff_base,
6799                })
6800                .log_err();
6801        }
6802    }
6803}