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