1mod ignore;
   2mod lsp_command;
   3pub mod project_settings;
   4pub mod search;
   5pub mod terminals;
   6pub mod worktree;
   7
   8#[cfg(test)]
   9mod project_tests;
  10#[cfg(test)]
  11mod worktree_tests;
  12
  13use anyhow::{anyhow, Context, Result};
  14use client::{proto, Client, Collaborator, TypedEnvelope, UserStore};
  15use clock::ReplicaId;
  16use collections::{hash_map, BTreeMap, HashMap, HashSet};
  17use copilot::Copilot;
  18use futures::{
  19    channel::{
  20        mpsc::{self, UnboundedReceiver},
  21        oneshot,
  22    },
  23    future::{try_join_all, Shared},
  24    stream::FuturesUnordered,
  25    AsyncWriteExt, Future, FutureExt, StreamExt, TryFutureExt,
  26};
  27use globset::{Glob, GlobSet, GlobSetBuilder};
  28use gpui::{
  29    executor::Background, AnyModelHandle, AppContext, AsyncAppContext, BorrowAppContext, Entity,
  30    ModelContext, ModelHandle, Task, WeakModelHandle,
  31};
  32use itertools::Itertools;
  33use language::{
  34    language_settings::{language_settings, FormatOnSave, Formatter, InlayHintKind},
  35    point_to_lsp,
  36    proto::{
  37        deserialize_anchor, deserialize_fingerprint, deserialize_line_ending, deserialize_version,
  38        serialize_anchor, serialize_version, split_operations,
  39    },
  40    range_from_lsp, range_to_lsp, Bias, Buffer, BufferSnapshot, CachedLspAdapter, CodeAction,
  41    CodeLabel, Completion, Diagnostic, DiagnosticEntry, DiagnosticSet, Diff, Event as BufferEvent,
  42    File as _, Language, LanguageRegistry, LanguageServerName, LocalFile, LspAdapterDelegate,
  43    OffsetRangeExt, Operation, Patch, PendingLanguageServer, PointUtf16, TextBufferSnapshot,
  44    ToOffset, ToPointUtf16, Transaction, Unclipped,
  45};
  46use log::error;
  47use lsp::{
  48    DiagnosticSeverity, DiagnosticTag, DidChangeWatchedFilesRegistrationOptions,
  49    DocumentHighlightKind, LanguageServer, LanguageServerBinary, LanguageServerId, OneOf,
  50};
  51use lsp_command::*;
  52use postage::watch;
  53use project_settings::{LspSettings, ProjectSettings};
  54use rand::prelude::*;
  55use search::SearchQuery;
  56use serde::Serialize;
  57use settings::SettingsStore;
  58use sha2::{Digest, Sha256};
  59use similar::{ChangeTag, TextDiff};
  60use smol::channel::{Receiver, Sender};
  61use std::{
  62    cmp::{self, Ordering},
  63    convert::TryInto,
  64    hash::Hash,
  65    mem,
  66    num::NonZeroU32,
  67    ops::Range,
  68    path::{self, Component, Path, PathBuf},
  69    process::Stdio,
  70    str,
  71    sync::{
  72        atomic::{AtomicUsize, Ordering::SeqCst},
  73        Arc,
  74    },
  75    time::{Duration, Instant},
  76};
  77use terminals::Terminals;
  78use text::Anchor;
  79use util::{
  80    debug_panic, defer, http::HttpClient, merge_json_value_into,
  81    paths::LOCAL_SETTINGS_RELATIVE_PATH, post_inc, ResultExt, TryFutureExt as _,
  82};
  83
  84pub use fs::*;
  85pub use worktree::*;
  86
  87pub trait Item {
  88    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
  89    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath>;
  90}
  91
  92// Language server state is stored across 3 collections:
  93//     language_servers =>
  94//         a mapping from unique server id to LanguageServerState which can either be a task for a
  95//         server in the process of starting, or a running server with adapter and language server arcs
  96//     language_server_ids => a mapping from worktreeId and server name to the unique server id
  97//     language_server_statuses => a mapping from unique server id to the current server status
  98//
  99// Multiple worktrees can map to the same language server for example when you jump to the definition
 100// of a file in the standard library. So language_server_ids is used to look up which server is active
 101// for a given worktree and language server name
 102//
 103// When starting a language server, first the id map is checked to make sure a server isn't already available
 104// for that worktree. If there is one, it finishes early. Otherwise, a new id is allocated and and
 105// the Starting variant of LanguageServerState is stored in the language_servers map.
 106pub struct Project {
 107    worktrees: Vec<WorktreeHandle>,
 108    active_entry: Option<ProjectEntryId>,
 109    buffer_ordered_messages_tx: mpsc::UnboundedSender<BufferOrderedMessage>,
 110    languages: Arc<LanguageRegistry>,
 111    supplementary_language_servers:
 112        HashMap<LanguageServerId, (LanguageServerName, Arc<LanguageServer>)>,
 113    language_servers: HashMap<LanguageServerId, LanguageServerState>,
 114    language_server_ids: HashMap<(WorktreeId, LanguageServerName), LanguageServerId>,
 115    language_server_statuses: BTreeMap<LanguageServerId, LanguageServerStatus>,
 116    last_workspace_edits_by_language_server: HashMap<LanguageServerId, ProjectTransaction>,
 117    client: Arc<client::Client>,
 118    next_entry_id: Arc<AtomicUsize>,
 119    join_project_response_message_id: u32,
 120    next_diagnostic_group_id: usize,
 121    user_store: ModelHandle<UserStore>,
 122    fs: Arc<dyn Fs>,
 123    client_state: Option<ProjectClientState>,
 124    collaborators: HashMap<proto::PeerId, Collaborator>,
 125    client_subscriptions: Vec<client::Subscription>,
 126    _subscriptions: Vec<gpui::Subscription>,
 127    next_buffer_id: u64,
 128    opened_buffer: (watch::Sender<()>, watch::Receiver<()>),
 129    shared_buffers: HashMap<proto::PeerId, HashSet<u64>>,
 130    #[allow(clippy::type_complexity)]
 131    loading_buffers_by_path: HashMap<
 132        ProjectPath,
 133        postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
 134    >,
 135    #[allow(clippy::type_complexity)]
 136    loading_local_worktrees:
 137        HashMap<Arc<Path>, Shared<Task<Result<ModelHandle<Worktree>, Arc<anyhow::Error>>>>>,
 138    opened_buffers: HashMap<u64, OpenBuffer>,
 139    local_buffer_ids_by_path: HashMap<ProjectPath, u64>,
 140    local_buffer_ids_by_entry_id: HashMap<ProjectEntryId, u64>,
 141    /// A mapping from a buffer ID to None means that we've started waiting for an ID but haven't finished loading it.
 142    /// Used for re-issuing buffer requests when peers temporarily disconnect
 143    incomplete_remote_buffers: HashMap<u64, Option<ModelHandle<Buffer>>>,
 144    buffer_snapshots: HashMap<u64, HashMap<LanguageServerId, Vec<LspBufferSnapshot>>>, // buffer_id -> server_id -> vec of snapshots
 145    buffers_being_formatted: HashSet<u64>,
 146    buffers_needing_diff: HashSet<WeakModelHandle<Buffer>>,
 147    git_diff_debouncer: DelayedDebounced,
 148    nonce: u128,
 149    _maintain_buffer_languages: Task<()>,
 150    _maintain_workspace_config: Task<()>,
 151    terminals: Terminals,
 152    copilot_lsp_subscription: Option<gpui::Subscription>,
 153    copilot_log_subscription: Option<lsp::Subscription>,
 154    current_lsp_settings: HashMap<Arc<str>, LspSettings>,
 155}
 156
 157struct DelayedDebounced {
 158    task: Option<Task<()>>,
 159    cancel_channel: Option<oneshot::Sender<()>>,
 160}
 161
 162enum LanguageServerToQuery {
 163    Primary,
 164    Other(LanguageServerId),
 165}
 166
 167impl DelayedDebounced {
 168    fn new() -> DelayedDebounced {
 169        DelayedDebounced {
 170            task: None,
 171            cancel_channel: None,
 172        }
 173    }
 174
 175    fn fire_new<F>(&mut self, delay: Duration, cx: &mut ModelContext<Project>, func: F)
 176    where
 177        F: 'static + FnOnce(&mut Project, &mut ModelContext<Project>) -> Task<()>,
 178    {
 179        if let Some(channel) = self.cancel_channel.take() {
 180            _ = channel.send(());
 181        }
 182
 183        let (sender, mut receiver) = oneshot::channel::<()>();
 184        self.cancel_channel = Some(sender);
 185
 186        let previous_task = self.task.take();
 187        self.task = Some(cx.spawn(|workspace, mut cx| async move {
 188            let mut timer = cx.background().timer(delay).fuse();
 189            if let Some(previous_task) = previous_task {
 190                previous_task.await;
 191            }
 192
 193            futures::select_biased! {
 194                _ = receiver => return,
 195                    _ = timer => {}
 196            }
 197
 198            workspace
 199                .update(&mut cx, |workspace, cx| (func)(workspace, cx))
 200                .await;
 201        }));
 202    }
 203}
 204
 205struct LspBufferSnapshot {
 206    version: i32,
 207    snapshot: TextBufferSnapshot,
 208}
 209
 210/// Message ordered with respect to buffer operations
 211enum BufferOrderedMessage {
 212    Operation {
 213        buffer_id: u64,
 214        operation: proto::Operation,
 215    },
 216    LanguageServerUpdate {
 217        language_server_id: LanguageServerId,
 218        message: proto::update_language_server::Variant,
 219    },
 220    Resync,
 221}
 222
 223enum LocalProjectUpdate {
 224    WorktreesChanged,
 225    CreateBufferForPeer {
 226        peer_id: proto::PeerId,
 227        buffer_id: u64,
 228    },
 229}
 230
 231enum OpenBuffer {
 232    Strong(ModelHandle<Buffer>),
 233    Weak(WeakModelHandle<Buffer>),
 234    Operations(Vec<Operation>),
 235}
 236
 237#[derive(Clone)]
 238enum WorktreeHandle {
 239    Strong(ModelHandle<Worktree>),
 240    Weak(WeakModelHandle<Worktree>),
 241}
 242
 243enum ProjectClientState {
 244    Local {
 245        remote_id: u64,
 246        updates_tx: mpsc::UnboundedSender<LocalProjectUpdate>,
 247        _send_updates: Task<()>,
 248    },
 249    Remote {
 250        sharing_has_stopped: bool,
 251        remote_id: u64,
 252        replica_id: ReplicaId,
 253    },
 254}
 255
 256#[derive(Clone, Debug, PartialEq)]
 257pub enum Event {
 258    LanguageServerAdded(LanguageServerId),
 259    LanguageServerRemoved(LanguageServerId),
 260    LanguageServerLog(LanguageServerId, String),
 261    Notification(String),
 262    ActiveEntryChanged(Option<ProjectEntryId>),
 263    ActivateProjectPanel,
 264    WorktreeAdded,
 265    WorktreeRemoved(WorktreeId),
 266    WorktreeUpdatedEntries(WorktreeId, UpdatedEntriesSet),
 267    DiskBasedDiagnosticsStarted {
 268        language_server_id: LanguageServerId,
 269    },
 270    DiskBasedDiagnosticsFinished {
 271        language_server_id: LanguageServerId,
 272    },
 273    DiagnosticsUpdated {
 274        path: ProjectPath,
 275        language_server_id: LanguageServerId,
 276    },
 277    RemoteIdChanged(Option<u64>),
 278    DisconnectedFromHost,
 279    Closed,
 280    DeletedEntry(ProjectEntryId),
 281    CollaboratorUpdated {
 282        old_peer_id: proto::PeerId,
 283        new_peer_id: proto::PeerId,
 284    },
 285    CollaboratorJoined(proto::PeerId),
 286    CollaboratorLeft(proto::PeerId),
 287    RefreshInlayHints,
 288}
 289
 290pub enum LanguageServerState {
 291    Starting(Task<Option<Arc<LanguageServer>>>),
 292
 293    Running {
 294        language: Arc<Language>,
 295        adapter: Arc<CachedLspAdapter>,
 296        server: Arc<LanguageServer>,
 297        watched_paths: HashMap<WorktreeId, GlobSet>,
 298        simulate_disk_based_diagnostics_completion: Option<Task<()>>,
 299    },
 300}
 301
 302#[derive(Serialize)]
 303pub struct LanguageServerStatus {
 304    pub name: String,
 305    pub pending_work: BTreeMap<String, LanguageServerProgress>,
 306    pub has_pending_diagnostic_updates: bool,
 307    progress_tokens: HashSet<String>,
 308}
 309
 310#[derive(Clone, Debug, Serialize)]
 311pub struct LanguageServerProgress {
 312    pub message: Option<String>,
 313    pub percentage: Option<usize>,
 314    #[serde(skip_serializing)]
 315    pub last_update_at: Instant,
 316}
 317
 318#[derive(Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
 319pub struct ProjectPath {
 320    pub worktree_id: WorktreeId,
 321    pub path: Arc<Path>,
 322}
 323
 324#[derive(Copy, Clone, Debug, Default, PartialEq, Serialize)]
 325pub struct DiagnosticSummary {
 326    pub error_count: usize,
 327    pub warning_count: usize,
 328}
 329
 330#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 331pub struct Location {
 332    pub buffer: ModelHandle<Buffer>,
 333    pub range: Range<language::Anchor>,
 334}
 335
 336#[derive(Debug, Clone, PartialEq, Eq)]
 337pub struct InlayHint {
 338    pub position: language::Anchor,
 339    pub label: InlayHintLabel,
 340    pub kind: Option<InlayHintKind>,
 341    pub padding_left: bool,
 342    pub padding_right: bool,
 343    pub tooltip: Option<InlayHintTooltip>,
 344    pub resolve_state: ResolveState,
 345}
 346
 347#[derive(Debug, Clone, PartialEq, Eq)]
 348pub enum ResolveState {
 349    Resolved,
 350    CanResolve(LanguageServerId, Option<lsp::LSPAny>),
 351    Resolving,
 352}
 353
 354impl InlayHint {
 355    pub fn text(&self) -> String {
 356        match &self.label {
 357            InlayHintLabel::String(s) => s.to_owned(),
 358            InlayHintLabel::LabelParts(parts) => parts.iter().map(|part| &part.value).join(""),
 359        }
 360    }
 361}
 362
 363#[derive(Debug, Clone, PartialEq, Eq)]
 364pub enum InlayHintLabel {
 365    String(String),
 366    LabelParts(Vec<InlayHintLabelPart>),
 367}
 368
 369#[derive(Debug, Clone, PartialEq, Eq)]
 370pub struct InlayHintLabelPart {
 371    pub value: String,
 372    pub tooltip: Option<InlayHintLabelPartTooltip>,
 373    pub location: Option<(LanguageServerId, lsp::Location)>,
 374}
 375
 376#[derive(Debug, Clone, PartialEq, Eq)]
 377pub enum InlayHintTooltip {
 378    String(String),
 379    MarkupContent(MarkupContent),
 380}
 381
 382#[derive(Debug, Clone, PartialEq, Eq)]
 383pub enum InlayHintLabelPartTooltip {
 384    String(String),
 385    MarkupContent(MarkupContent),
 386}
 387
 388#[derive(Debug, Clone, PartialEq, Eq)]
 389pub struct MarkupContent {
 390    pub kind: HoverBlockKind,
 391    pub value: String,
 392}
 393
 394#[derive(Debug, Clone)]
 395pub struct LocationLink {
 396    pub origin: Option<Location>,
 397    pub target: Location,
 398}
 399
 400#[derive(Debug)]
 401pub struct DocumentHighlight {
 402    pub range: Range<language::Anchor>,
 403    pub kind: DocumentHighlightKind,
 404}
 405
 406#[derive(Clone, Debug)]
 407pub struct Symbol {
 408    pub language_server_name: LanguageServerName,
 409    pub source_worktree_id: WorktreeId,
 410    pub path: ProjectPath,
 411    pub label: CodeLabel,
 412    pub name: String,
 413    pub kind: lsp::SymbolKind,
 414    pub range: Range<Unclipped<PointUtf16>>,
 415    pub signature: [u8; 32],
 416}
 417
 418#[derive(Clone, Debug, PartialEq)]
 419pub struct HoverBlock {
 420    pub text: String,
 421    pub kind: HoverBlockKind,
 422}
 423
 424#[derive(Clone, Debug, PartialEq, Eq)]
 425pub enum HoverBlockKind {
 426    PlainText,
 427    Markdown,
 428    Code { language: String },
 429}
 430
 431#[derive(Debug)]
 432pub struct Hover {
 433    pub contents: Vec<HoverBlock>,
 434    pub range: Option<Range<language::Anchor>>,
 435    pub language: Option<Arc<Language>>,
 436}
 437
 438impl Hover {
 439    pub fn is_empty(&self) -> bool {
 440        self.contents.iter().all(|block| block.text.is_empty())
 441    }
 442}
 443
 444#[derive(Default)]
 445pub struct ProjectTransaction(pub HashMap<ModelHandle<Buffer>, language::Transaction>);
 446
 447impl DiagnosticSummary {
 448    fn new<'a, T: 'a>(diagnostics: impl IntoIterator<Item = &'a DiagnosticEntry<T>>) -> Self {
 449        let mut this = Self {
 450            error_count: 0,
 451            warning_count: 0,
 452        };
 453
 454        for entry in diagnostics {
 455            if entry.diagnostic.is_primary {
 456                match entry.diagnostic.severity {
 457                    DiagnosticSeverity::ERROR => this.error_count += 1,
 458                    DiagnosticSeverity::WARNING => this.warning_count += 1,
 459                    _ => {}
 460                }
 461            }
 462        }
 463
 464        this
 465    }
 466
 467    pub fn is_empty(&self) -> bool {
 468        self.error_count == 0 && self.warning_count == 0
 469    }
 470
 471    pub fn to_proto(
 472        &self,
 473        language_server_id: LanguageServerId,
 474        path: &Path,
 475    ) -> proto::DiagnosticSummary {
 476        proto::DiagnosticSummary {
 477            path: path.to_string_lossy().to_string(),
 478            language_server_id: language_server_id.0 as u64,
 479            error_count: self.error_count as u32,
 480            warning_count: self.warning_count as u32,
 481        }
 482    }
 483}
 484
 485#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
 486pub struct ProjectEntryId(usize);
 487
 488impl ProjectEntryId {
 489    pub const MAX: Self = Self(usize::MAX);
 490
 491    pub fn new(counter: &AtomicUsize) -> Self {
 492        Self(counter.fetch_add(1, SeqCst))
 493    }
 494
 495    pub fn from_proto(id: u64) -> Self {
 496        Self(id as usize)
 497    }
 498
 499    pub fn to_proto(&self) -> u64 {
 500        self.0 as u64
 501    }
 502
 503    pub fn to_usize(&self) -> usize {
 504        self.0
 505    }
 506}
 507
 508#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 509pub enum FormatTrigger {
 510    Save,
 511    Manual,
 512}
 513
 514struct ProjectLspAdapterDelegate {
 515    project: ModelHandle<Project>,
 516    http_client: Arc<dyn HttpClient>,
 517}
 518
 519impl FormatTrigger {
 520    fn from_proto(value: i32) -> FormatTrigger {
 521        match value {
 522            0 => FormatTrigger::Save,
 523            1 => FormatTrigger::Manual,
 524            _ => FormatTrigger::Save,
 525        }
 526    }
 527}
 528#[derive(Clone, Debug, PartialEq)]
 529enum SearchMatchCandidate {
 530    OpenBuffer {
 531        buffer: ModelHandle<Buffer>,
 532        // This might be an unnamed file without representation on filesystem
 533        path: Option<Arc<Path>>,
 534    },
 535    Path {
 536        worktree_id: WorktreeId,
 537        path: Arc<Path>,
 538    },
 539}
 540
 541type SearchMatchCandidateIndex = usize;
 542impl SearchMatchCandidate {
 543    fn path(&self) -> Option<Arc<Path>> {
 544        match self {
 545            SearchMatchCandidate::OpenBuffer { path, .. } => path.clone(),
 546            SearchMatchCandidate::Path { path, .. } => Some(path.clone()),
 547        }
 548    }
 549}
 550
 551impl Project {
 552    pub fn init_settings(cx: &mut AppContext) {
 553        settings::register::<ProjectSettings>(cx);
 554    }
 555
 556    pub fn init(client: &Arc<Client>, cx: &mut AppContext) {
 557        Self::init_settings(cx);
 558
 559        client.add_model_message_handler(Self::handle_add_collaborator);
 560        client.add_model_message_handler(Self::handle_update_project_collaborator);
 561        client.add_model_message_handler(Self::handle_remove_collaborator);
 562        client.add_model_message_handler(Self::handle_buffer_reloaded);
 563        client.add_model_message_handler(Self::handle_buffer_saved);
 564        client.add_model_message_handler(Self::handle_start_language_server);
 565        client.add_model_message_handler(Self::handle_update_language_server);
 566        client.add_model_message_handler(Self::handle_update_project);
 567        client.add_model_message_handler(Self::handle_unshare_project);
 568        client.add_model_message_handler(Self::handle_create_buffer_for_peer);
 569        client.add_model_message_handler(Self::handle_update_buffer_file);
 570        client.add_model_request_handler(Self::handle_update_buffer);
 571        client.add_model_message_handler(Self::handle_update_diagnostic_summary);
 572        client.add_model_message_handler(Self::handle_update_worktree);
 573        client.add_model_message_handler(Self::handle_update_worktree_settings);
 574        client.add_model_request_handler(Self::handle_create_project_entry);
 575        client.add_model_request_handler(Self::handle_rename_project_entry);
 576        client.add_model_request_handler(Self::handle_copy_project_entry);
 577        client.add_model_request_handler(Self::handle_delete_project_entry);
 578        client.add_model_request_handler(Self::handle_expand_project_entry);
 579        client.add_model_request_handler(Self::handle_apply_additional_edits_for_completion);
 580        client.add_model_request_handler(Self::handle_apply_code_action);
 581        client.add_model_request_handler(Self::handle_on_type_formatting);
 582        client.add_model_request_handler(Self::handle_inlay_hints);
 583        client.add_model_request_handler(Self::handle_resolve_completion_documentation);
 584        client.add_model_request_handler(Self::handle_resolve_inlay_hint);
 585        client.add_model_request_handler(Self::handle_refresh_inlay_hints);
 586        client.add_model_request_handler(Self::handle_reload_buffers);
 587        client.add_model_request_handler(Self::handle_synchronize_buffers);
 588        client.add_model_request_handler(Self::handle_format_buffers);
 589        client.add_model_request_handler(Self::handle_lsp_command::<GetCodeActions>);
 590        client.add_model_request_handler(Self::handle_lsp_command::<GetCompletions>);
 591        client.add_model_request_handler(Self::handle_lsp_command::<GetHover>);
 592        client.add_model_request_handler(Self::handle_lsp_command::<GetDefinition>);
 593        client.add_model_request_handler(Self::handle_lsp_command::<GetTypeDefinition>);
 594        client.add_model_request_handler(Self::handle_lsp_command::<GetDocumentHighlights>);
 595        client.add_model_request_handler(Self::handle_lsp_command::<GetReferences>);
 596        client.add_model_request_handler(Self::handle_lsp_command::<PrepareRename>);
 597        client.add_model_request_handler(Self::handle_lsp_command::<PerformRename>);
 598        client.add_model_request_handler(Self::handle_search_project);
 599        client.add_model_request_handler(Self::handle_get_project_symbols);
 600        client.add_model_request_handler(Self::handle_open_buffer_for_symbol);
 601        client.add_model_request_handler(Self::handle_open_buffer_by_id);
 602        client.add_model_request_handler(Self::handle_open_buffer_by_path);
 603        client.add_model_request_handler(Self::handle_save_buffer);
 604        client.add_model_message_handler(Self::handle_update_diff_base);
 605    }
 606
 607    pub fn local(
 608        client: Arc<Client>,
 609        user_store: ModelHandle<UserStore>,
 610        languages: Arc<LanguageRegistry>,
 611        fs: Arc<dyn Fs>,
 612        cx: &mut AppContext,
 613    ) -> ModelHandle<Self> {
 614        cx.add_model(|cx: &mut ModelContext<Self>| {
 615            let (tx, rx) = mpsc::unbounded();
 616            cx.spawn_weak(|this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 617                .detach();
 618            let copilot_lsp_subscription =
 619                Copilot::global(cx).map(|copilot| subscribe_for_copilot_events(&copilot, cx));
 620            Self {
 621                worktrees: Default::default(),
 622                buffer_ordered_messages_tx: tx,
 623                collaborators: Default::default(),
 624                next_buffer_id: 0,
 625                opened_buffers: Default::default(),
 626                shared_buffers: Default::default(),
 627                incomplete_remote_buffers: Default::default(),
 628                loading_buffers_by_path: Default::default(),
 629                loading_local_worktrees: Default::default(),
 630                local_buffer_ids_by_path: Default::default(),
 631                local_buffer_ids_by_entry_id: Default::default(),
 632                buffer_snapshots: Default::default(),
 633                join_project_response_message_id: 0,
 634                client_state: None,
 635                opened_buffer: watch::channel(),
 636                client_subscriptions: Vec::new(),
 637                _subscriptions: vec![
 638                    cx.observe_global::<SettingsStore, _>(Self::on_settings_changed)
 639                ],
 640                _maintain_buffer_languages: Self::maintain_buffer_languages(languages.clone(), cx),
 641                _maintain_workspace_config: Self::maintain_workspace_config(cx),
 642                active_entry: None,
 643                languages,
 644                client,
 645                user_store,
 646                fs,
 647                next_entry_id: Default::default(),
 648                next_diagnostic_group_id: Default::default(),
 649                supplementary_language_servers: HashMap::default(),
 650                language_servers: Default::default(),
 651                language_server_ids: Default::default(),
 652                language_server_statuses: Default::default(),
 653                last_workspace_edits_by_language_server: Default::default(),
 654                buffers_being_formatted: Default::default(),
 655                buffers_needing_diff: Default::default(),
 656                git_diff_debouncer: DelayedDebounced::new(),
 657                nonce: StdRng::from_entropy().gen(),
 658                terminals: Terminals {
 659                    local_handles: Vec::new(),
 660                },
 661                copilot_lsp_subscription,
 662                copilot_log_subscription: None,
 663                current_lsp_settings: settings::get::<ProjectSettings>(cx).lsp.clone(),
 664            }
 665        })
 666    }
 667
 668    pub async fn remote(
 669        remote_id: u64,
 670        client: Arc<Client>,
 671        user_store: ModelHandle<UserStore>,
 672        languages: Arc<LanguageRegistry>,
 673        fs: Arc<dyn Fs>,
 674        mut cx: AsyncAppContext,
 675    ) -> Result<ModelHandle<Self>> {
 676        client.authenticate_and_connect(true, &cx).await?;
 677
 678        let subscription = client.subscribe_to_entity(remote_id)?;
 679        let response = client
 680            .request_envelope(proto::JoinProject {
 681                project_id: remote_id,
 682            })
 683            .await?;
 684        let this = cx.add_model(|cx| {
 685            let replica_id = response.payload.replica_id as ReplicaId;
 686
 687            let mut worktrees = Vec::new();
 688            for worktree in response.payload.worktrees {
 689                let worktree = cx.update(|cx| {
 690                    Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx)
 691                });
 692                worktrees.push(worktree);
 693            }
 694
 695            let (tx, rx) = mpsc::unbounded();
 696            cx.spawn_weak(|this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 697                .detach();
 698            let copilot_lsp_subscription =
 699                Copilot::global(cx).map(|copilot| subscribe_for_copilot_events(&copilot, cx));
 700            let mut this = Self {
 701                worktrees: Vec::new(),
 702                buffer_ordered_messages_tx: tx,
 703                loading_buffers_by_path: Default::default(),
 704                next_buffer_id: 0,
 705                opened_buffer: watch::channel(),
 706                shared_buffers: Default::default(),
 707                incomplete_remote_buffers: Default::default(),
 708                loading_local_worktrees: Default::default(),
 709                local_buffer_ids_by_path: Default::default(),
 710                local_buffer_ids_by_entry_id: Default::default(),
 711                active_entry: None,
 712                collaborators: Default::default(),
 713                join_project_response_message_id: response.message_id,
 714                _maintain_buffer_languages: Self::maintain_buffer_languages(languages.clone(), cx),
 715                _maintain_workspace_config: Self::maintain_workspace_config(cx),
 716                languages,
 717                user_store: user_store.clone(),
 718                fs,
 719                next_entry_id: Default::default(),
 720                next_diagnostic_group_id: Default::default(),
 721                client_subscriptions: Default::default(),
 722                _subscriptions: Default::default(),
 723                client: client.clone(),
 724                client_state: Some(ProjectClientState::Remote {
 725                    sharing_has_stopped: false,
 726                    remote_id,
 727                    replica_id,
 728                }),
 729                supplementary_language_servers: HashMap::default(),
 730                language_servers: Default::default(),
 731                language_server_ids: Default::default(),
 732                language_server_statuses: response
 733                    .payload
 734                    .language_servers
 735                    .into_iter()
 736                    .map(|server| {
 737                        (
 738                            LanguageServerId(server.id as usize),
 739                            LanguageServerStatus {
 740                                name: server.name,
 741                                pending_work: Default::default(),
 742                                has_pending_diagnostic_updates: false,
 743                                progress_tokens: Default::default(),
 744                            },
 745                        )
 746                    })
 747                    .collect(),
 748                last_workspace_edits_by_language_server: Default::default(),
 749                opened_buffers: Default::default(),
 750                buffers_being_formatted: Default::default(),
 751                buffers_needing_diff: Default::default(),
 752                git_diff_debouncer: DelayedDebounced::new(),
 753                buffer_snapshots: Default::default(),
 754                nonce: StdRng::from_entropy().gen(),
 755                terminals: Terminals {
 756                    local_handles: Vec::new(),
 757                },
 758                copilot_lsp_subscription,
 759                copilot_log_subscription: None,
 760                current_lsp_settings: settings::get::<ProjectSettings>(cx).lsp.clone(),
 761            };
 762            for worktree in worktrees {
 763                let _ = this.add_worktree(&worktree, cx);
 764            }
 765            this
 766        });
 767        let subscription = subscription.set_model(&this, &mut cx);
 768
 769        let user_ids = response
 770            .payload
 771            .collaborators
 772            .iter()
 773            .map(|peer| peer.user_id)
 774            .collect();
 775        user_store
 776            .update(&mut cx, |user_store, cx| user_store.get_users(user_ids, cx))
 777            .await?;
 778
 779        this.update(&mut cx, |this, cx| {
 780            this.set_collaborators_from_proto(response.payload.collaborators, cx)?;
 781            this.client_subscriptions.push(subscription);
 782            anyhow::Ok(())
 783        })?;
 784
 785        Ok(this)
 786    }
 787
 788    #[cfg(any(test, feature = "test-support"))]
 789    pub async fn test(
 790        fs: Arc<dyn Fs>,
 791        root_paths: impl IntoIterator<Item = &Path>,
 792        cx: &mut gpui::TestAppContext,
 793    ) -> ModelHandle<Project> {
 794        let mut languages = LanguageRegistry::test();
 795        languages.set_executor(cx.background());
 796        let http_client = util::http::FakeHttpClient::with_404_response();
 797        let client = cx.update(|cx| client::Client::new(http_client.clone(), cx));
 798        let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http_client, cx));
 799        let project =
 800            cx.update(|cx| Project::local(client, user_store, Arc::new(languages), fs, cx));
 801        for path in root_paths {
 802            let (tree, _) = project
 803                .update(cx, |project, cx| {
 804                    project.find_or_create_local_worktree(path, true, cx)
 805                })
 806                .await
 807                .unwrap();
 808            tree.read_with(cx, |tree, _| tree.as_local().unwrap().scan_complete())
 809                .await;
 810        }
 811        project
 812    }
 813
 814    fn on_settings_changed(&mut self, cx: &mut ModelContext<Self>) {
 815        let mut language_servers_to_start = Vec::new();
 816        for buffer in self.opened_buffers.values() {
 817            if let Some(buffer) = buffer.upgrade(cx) {
 818                let buffer = buffer.read(cx);
 819                if let Some((file, language)) = buffer.file().zip(buffer.language()) {
 820                    let settings = language_settings(Some(language), Some(file), cx);
 821                    if settings.enable_language_server {
 822                        if let Some(file) = File::from_dyn(Some(file)) {
 823                            language_servers_to_start
 824                                .push((file.worktree.clone(), language.clone()));
 825                        }
 826                    }
 827                }
 828            }
 829        }
 830
 831        let mut language_servers_to_stop = Vec::new();
 832        let mut language_servers_to_restart = Vec::new();
 833        let languages = self.languages.to_vec();
 834
 835        let new_lsp_settings = settings::get::<ProjectSettings>(cx).lsp.clone();
 836        let current_lsp_settings = &self.current_lsp_settings;
 837        for (worktree_id, started_lsp_name) in self.language_server_ids.keys() {
 838            let language = languages.iter().find_map(|l| {
 839                let adapter = l
 840                    .lsp_adapters()
 841                    .iter()
 842                    .find(|adapter| &adapter.name == started_lsp_name)?;
 843                Some((l, adapter))
 844            });
 845            if let Some((language, adapter)) = language {
 846                let worktree = self.worktree_for_id(*worktree_id, cx);
 847                let file = worktree.as_ref().and_then(|tree| {
 848                    tree.update(cx, |tree, cx| tree.root_file(cx).map(|f| f as _))
 849                });
 850                if !language_settings(Some(language), file.as_ref(), cx).enable_language_server {
 851                    language_servers_to_stop.push((*worktree_id, started_lsp_name.clone()));
 852                } else if let Some(worktree) = worktree {
 853                    let server_name = &adapter.name.0;
 854                    match (
 855                        current_lsp_settings.get(server_name),
 856                        new_lsp_settings.get(server_name),
 857                    ) {
 858                        (None, None) => {}
 859                        (Some(_), None) | (None, Some(_)) => {
 860                            language_servers_to_restart.push((worktree, Arc::clone(language)));
 861                        }
 862                        (Some(current_lsp_settings), Some(new_lsp_settings)) => {
 863                            if current_lsp_settings != new_lsp_settings {
 864                                language_servers_to_restart.push((worktree, Arc::clone(language)));
 865                            }
 866                        }
 867                    }
 868                }
 869            }
 870        }
 871        self.current_lsp_settings = new_lsp_settings;
 872
 873        // Stop all newly-disabled language servers.
 874        for (worktree_id, adapter_name) in language_servers_to_stop {
 875            self.stop_language_server(worktree_id, adapter_name, cx)
 876                .detach();
 877        }
 878
 879        // Start all the newly-enabled language servers.
 880        for (worktree, language) in language_servers_to_start {
 881            let worktree_path = worktree.read(cx).abs_path();
 882            self.start_language_servers(&worktree, worktree_path, language, cx);
 883        }
 884
 885        // Restart all language servers with changed initialization options.
 886        for (worktree, language) in language_servers_to_restart {
 887            self.restart_language_servers(worktree, language, cx);
 888        }
 889
 890        if self.copilot_lsp_subscription.is_none() {
 891            if let Some(copilot) = Copilot::global(cx) {
 892                for buffer in self.opened_buffers.values() {
 893                    if let Some(buffer) = buffer.upgrade(cx) {
 894                        self.register_buffer_with_copilot(&buffer, cx);
 895                    }
 896                }
 897                self.copilot_lsp_subscription = Some(subscribe_for_copilot_events(&copilot, cx));
 898            }
 899        }
 900
 901        cx.notify();
 902    }
 903
 904    pub fn buffer_for_id(&self, remote_id: u64, cx: &AppContext) -> Option<ModelHandle<Buffer>> {
 905        self.opened_buffers
 906            .get(&remote_id)
 907            .and_then(|buffer| buffer.upgrade(cx))
 908    }
 909
 910    pub fn languages(&self) -> &Arc<LanguageRegistry> {
 911        &self.languages
 912    }
 913
 914    pub fn client(&self) -> Arc<Client> {
 915        self.client.clone()
 916    }
 917
 918    pub fn user_store(&self) -> ModelHandle<UserStore> {
 919        self.user_store.clone()
 920    }
 921
 922    pub fn opened_buffers(&self, cx: &AppContext) -> Vec<ModelHandle<Buffer>> {
 923        self.opened_buffers
 924            .values()
 925            .filter_map(|b| b.upgrade(cx))
 926            .collect()
 927    }
 928
 929    #[cfg(any(test, feature = "test-support"))]
 930    pub fn has_open_buffer(&self, path: impl Into<ProjectPath>, cx: &AppContext) -> bool {
 931        let path = path.into();
 932        if let Some(worktree) = self.worktree_for_id(path.worktree_id, cx) {
 933            self.opened_buffers.iter().any(|(_, buffer)| {
 934                if let Some(buffer) = buffer.upgrade(cx) {
 935                    if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
 936                        if file.worktree == worktree && file.path() == &path.path {
 937                            return true;
 938                        }
 939                    }
 940                }
 941                false
 942            })
 943        } else {
 944            false
 945        }
 946    }
 947
 948    pub fn fs(&self) -> &Arc<dyn Fs> {
 949        &self.fs
 950    }
 951
 952    pub fn remote_id(&self) -> Option<u64> {
 953        match self.client_state.as_ref()? {
 954            ProjectClientState::Local { remote_id, .. }
 955            | ProjectClientState::Remote { remote_id, .. } => Some(*remote_id),
 956        }
 957    }
 958
 959    pub fn replica_id(&self) -> ReplicaId {
 960        match &self.client_state {
 961            Some(ProjectClientState::Remote { replica_id, .. }) => *replica_id,
 962            _ => 0,
 963        }
 964    }
 965
 966    fn metadata_changed(&mut self, cx: &mut ModelContext<Self>) {
 967        if let Some(ProjectClientState::Local { updates_tx, .. }) = &mut self.client_state {
 968            updates_tx
 969                .unbounded_send(LocalProjectUpdate::WorktreesChanged)
 970                .ok();
 971        }
 972        cx.notify();
 973    }
 974
 975    pub fn collaborators(&self) -> &HashMap<proto::PeerId, Collaborator> {
 976        &self.collaborators
 977    }
 978
 979    pub fn host(&self) -> Option<&Collaborator> {
 980        self.collaborators.values().find(|c| c.replica_id == 0)
 981    }
 982
 983    /// Collect all worktrees, including ones that don't appear in the project panel
 984    pub fn worktrees<'a>(
 985        &'a self,
 986        cx: &'a AppContext,
 987    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 988        self.worktrees
 989            .iter()
 990            .filter_map(move |worktree| worktree.upgrade(cx))
 991    }
 992
 993    /// Collect all user-visible worktrees, the ones that appear in the project panel
 994    pub fn visible_worktrees<'a>(
 995        &'a self,
 996        cx: &'a AppContext,
 997    ) -> impl 'a + DoubleEndedIterator<Item = ModelHandle<Worktree>> {
 998        self.worktrees.iter().filter_map(|worktree| {
 999            worktree.upgrade(cx).and_then(|worktree| {
1000                if worktree.read(cx).is_visible() {
1001                    Some(worktree)
1002                } else {
1003                    None
1004                }
1005            })
1006        })
1007    }
1008
1009    pub fn worktree_root_names<'a>(&'a self, cx: &'a AppContext) -> impl Iterator<Item = &'a str> {
1010        self.visible_worktrees(cx)
1011            .map(|tree| tree.read(cx).root_name())
1012    }
1013
1014    pub fn worktree_for_id(
1015        &self,
1016        id: WorktreeId,
1017        cx: &AppContext,
1018    ) -> Option<ModelHandle<Worktree>> {
1019        self.worktrees(cx)
1020            .find(|worktree| worktree.read(cx).id() == id)
1021    }
1022
1023    pub fn worktree_for_entry(
1024        &self,
1025        entry_id: ProjectEntryId,
1026        cx: &AppContext,
1027    ) -> Option<ModelHandle<Worktree>> {
1028        self.worktrees(cx)
1029            .find(|worktree| worktree.read(cx).contains_entry(entry_id))
1030    }
1031
1032    pub fn worktree_id_for_entry(
1033        &self,
1034        entry_id: ProjectEntryId,
1035        cx: &AppContext,
1036    ) -> Option<WorktreeId> {
1037        self.worktree_for_entry(entry_id, cx)
1038            .map(|worktree| worktree.read(cx).id())
1039    }
1040
1041    pub fn contains_paths(&self, paths: &[PathBuf], cx: &AppContext) -> bool {
1042        paths.iter().all(|path| self.contains_path(path, cx))
1043    }
1044
1045    pub fn contains_path(&self, path: &Path, cx: &AppContext) -> bool {
1046        for worktree in self.worktrees(cx) {
1047            let worktree = worktree.read(cx).as_local();
1048            if worktree.map_or(false, |w| w.contains_abs_path(path)) {
1049                return true;
1050            }
1051        }
1052        false
1053    }
1054
1055    pub fn create_entry(
1056        &mut self,
1057        project_path: impl Into<ProjectPath>,
1058        is_directory: bool,
1059        cx: &mut ModelContext<Self>,
1060    ) -> Option<Task<Result<Entry>>> {
1061        let project_path = project_path.into();
1062        let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
1063        if self.is_local() {
1064            Some(worktree.update(cx, |worktree, cx| {
1065                worktree
1066                    .as_local_mut()
1067                    .unwrap()
1068                    .create_entry(project_path.path, is_directory, cx)
1069            }))
1070        } else {
1071            let client = self.client.clone();
1072            let project_id = self.remote_id().unwrap();
1073            Some(cx.spawn_weak(|_, mut cx| async move {
1074                let response = client
1075                    .request(proto::CreateProjectEntry {
1076                        worktree_id: project_path.worktree_id.to_proto(),
1077                        project_id,
1078                        path: project_path.path.to_string_lossy().into(),
1079                        is_directory,
1080                    })
1081                    .await?;
1082                let entry = response
1083                    .entry
1084                    .ok_or_else(|| anyhow!("missing entry in response"))?;
1085                worktree
1086                    .update(&mut cx, |worktree, cx| {
1087                        worktree.as_remote_mut().unwrap().insert_entry(
1088                            entry,
1089                            response.worktree_scan_id as usize,
1090                            cx,
1091                        )
1092                    })
1093                    .await
1094            }))
1095        }
1096    }
1097
1098    pub fn copy_entry(
1099        &mut self,
1100        entry_id: ProjectEntryId,
1101        new_path: impl Into<Arc<Path>>,
1102        cx: &mut ModelContext<Self>,
1103    ) -> Option<Task<Result<Entry>>> {
1104        let worktree = self.worktree_for_entry(entry_id, cx)?;
1105        let new_path = new_path.into();
1106        if self.is_local() {
1107            worktree.update(cx, |worktree, cx| {
1108                worktree
1109                    .as_local_mut()
1110                    .unwrap()
1111                    .copy_entry(entry_id, new_path, cx)
1112            })
1113        } else {
1114            let client = self.client.clone();
1115            let project_id = self.remote_id().unwrap();
1116
1117            Some(cx.spawn_weak(|_, mut cx| async move {
1118                let response = client
1119                    .request(proto::CopyProjectEntry {
1120                        project_id,
1121                        entry_id: entry_id.to_proto(),
1122                        new_path: new_path.to_string_lossy().into(),
1123                    })
1124                    .await?;
1125                let entry = response
1126                    .entry
1127                    .ok_or_else(|| anyhow!("missing entry in response"))?;
1128                worktree
1129                    .update(&mut cx, |worktree, cx| {
1130                        worktree.as_remote_mut().unwrap().insert_entry(
1131                            entry,
1132                            response.worktree_scan_id as usize,
1133                            cx,
1134                        )
1135                    })
1136                    .await
1137            }))
1138        }
1139    }
1140
1141    pub fn rename_entry(
1142        &mut self,
1143        entry_id: ProjectEntryId,
1144        new_path: impl Into<Arc<Path>>,
1145        cx: &mut ModelContext<Self>,
1146    ) -> Option<Task<Result<Entry>>> {
1147        let worktree = self.worktree_for_entry(entry_id, cx)?;
1148        let new_path = new_path.into();
1149        if self.is_local() {
1150            worktree.update(cx, |worktree, cx| {
1151                worktree
1152                    .as_local_mut()
1153                    .unwrap()
1154                    .rename_entry(entry_id, new_path, cx)
1155            })
1156        } else {
1157            let client = self.client.clone();
1158            let project_id = self.remote_id().unwrap();
1159
1160            Some(cx.spawn_weak(|_, mut cx| async move {
1161                let response = client
1162                    .request(proto::RenameProjectEntry {
1163                        project_id,
1164                        entry_id: entry_id.to_proto(),
1165                        new_path: new_path.to_string_lossy().into(),
1166                    })
1167                    .await?;
1168                let entry = response
1169                    .entry
1170                    .ok_or_else(|| anyhow!("missing entry in response"))?;
1171                worktree
1172                    .update(&mut cx, |worktree, cx| {
1173                        worktree.as_remote_mut().unwrap().insert_entry(
1174                            entry,
1175                            response.worktree_scan_id as usize,
1176                            cx,
1177                        )
1178                    })
1179                    .await
1180            }))
1181        }
1182    }
1183
1184    pub fn delete_entry(
1185        &mut self,
1186        entry_id: ProjectEntryId,
1187        cx: &mut ModelContext<Self>,
1188    ) -> Option<Task<Result<()>>> {
1189        let worktree = self.worktree_for_entry(entry_id, cx)?;
1190
1191        cx.emit(Event::DeletedEntry(entry_id));
1192
1193        if self.is_local() {
1194            worktree.update(cx, |worktree, cx| {
1195                worktree.as_local_mut().unwrap().delete_entry(entry_id, cx)
1196            })
1197        } else {
1198            let client = self.client.clone();
1199            let project_id = self.remote_id().unwrap();
1200            Some(cx.spawn_weak(|_, mut cx| async move {
1201                let response = client
1202                    .request(proto::DeleteProjectEntry {
1203                        project_id,
1204                        entry_id: entry_id.to_proto(),
1205                    })
1206                    .await?;
1207                worktree
1208                    .update(&mut cx, move |worktree, cx| {
1209                        worktree.as_remote_mut().unwrap().delete_entry(
1210                            entry_id,
1211                            response.worktree_scan_id as usize,
1212                            cx,
1213                        )
1214                    })
1215                    .await
1216            }))
1217        }
1218    }
1219
1220    pub fn expand_entry(
1221        &mut self,
1222        worktree_id: WorktreeId,
1223        entry_id: ProjectEntryId,
1224        cx: &mut ModelContext<Self>,
1225    ) -> Option<Task<Result<()>>> {
1226        let worktree = self.worktree_for_id(worktree_id, cx)?;
1227        if self.is_local() {
1228            worktree.update(cx, |worktree, cx| {
1229                worktree.as_local_mut().unwrap().expand_entry(entry_id, cx)
1230            })
1231        } else {
1232            let worktree = worktree.downgrade();
1233            let request = self.client.request(proto::ExpandProjectEntry {
1234                project_id: self.remote_id().unwrap(),
1235                entry_id: entry_id.to_proto(),
1236            });
1237            Some(cx.spawn_weak(|_, mut cx| async move {
1238                let response = request.await?;
1239                if let Some(worktree) = worktree.upgrade(&cx) {
1240                    worktree
1241                        .update(&mut cx, |worktree, _| {
1242                            worktree
1243                                .as_remote_mut()
1244                                .unwrap()
1245                                .wait_for_snapshot(response.worktree_scan_id as usize)
1246                        })
1247                        .await?;
1248                }
1249                Ok(())
1250            }))
1251        }
1252    }
1253
1254    pub fn shared(&mut self, project_id: u64, cx: &mut ModelContext<Self>) -> Result<()> {
1255        if self.client_state.is_some() {
1256            return Err(anyhow!("project was already shared"));
1257        }
1258        self.client_subscriptions.push(
1259            self.client
1260                .subscribe_to_entity(project_id)?
1261                .set_model(&cx.handle(), &mut cx.to_async()),
1262        );
1263
1264        for open_buffer in self.opened_buffers.values_mut() {
1265            match open_buffer {
1266                OpenBuffer::Strong(_) => {}
1267                OpenBuffer::Weak(buffer) => {
1268                    if let Some(buffer) = buffer.upgrade(cx) {
1269                        *open_buffer = OpenBuffer::Strong(buffer);
1270                    }
1271                }
1272                OpenBuffer::Operations(_) => unreachable!(),
1273            }
1274        }
1275
1276        for worktree_handle in self.worktrees.iter_mut() {
1277            match worktree_handle {
1278                WorktreeHandle::Strong(_) => {}
1279                WorktreeHandle::Weak(worktree) => {
1280                    if let Some(worktree) = worktree.upgrade(cx) {
1281                        *worktree_handle = WorktreeHandle::Strong(worktree);
1282                    }
1283                }
1284            }
1285        }
1286
1287        for (server_id, status) in &self.language_server_statuses {
1288            self.client
1289                .send(proto::StartLanguageServer {
1290                    project_id,
1291                    server: Some(proto::LanguageServer {
1292                        id: server_id.0 as u64,
1293                        name: status.name.clone(),
1294                    }),
1295                })
1296                .log_err();
1297        }
1298
1299        let store = cx.global::<SettingsStore>();
1300        for worktree in self.worktrees(cx) {
1301            let worktree_id = worktree.read(cx).id().to_proto();
1302            for (path, content) in store.local_settings(worktree.id()) {
1303                self.client
1304                    .send(proto::UpdateWorktreeSettings {
1305                        project_id,
1306                        worktree_id,
1307                        path: path.to_string_lossy().into(),
1308                        content: Some(content),
1309                    })
1310                    .log_err();
1311            }
1312        }
1313
1314        let (updates_tx, mut updates_rx) = mpsc::unbounded();
1315        let client = self.client.clone();
1316        self.client_state = Some(ProjectClientState::Local {
1317            remote_id: project_id,
1318            updates_tx,
1319            _send_updates: cx.spawn_weak(move |this, mut cx| async move {
1320                while let Some(update) = updates_rx.next().await {
1321                    let Some(this) = this.upgrade(&cx) else { break };
1322
1323                    match update {
1324                        LocalProjectUpdate::WorktreesChanged => {
1325                            let worktrees = this
1326                                .read_with(&cx, |this, cx| this.worktrees(cx).collect::<Vec<_>>());
1327                            let update_project = this
1328                                .read_with(&cx, |this, cx| {
1329                                    this.client.request(proto::UpdateProject {
1330                                        project_id,
1331                                        worktrees: this.worktree_metadata_protos(cx),
1332                                    })
1333                                })
1334                                .await;
1335                            if update_project.is_ok() {
1336                                for worktree in worktrees {
1337                                    worktree.update(&mut cx, |worktree, cx| {
1338                                        let worktree = worktree.as_local_mut().unwrap();
1339                                        worktree.share(project_id, cx).detach_and_log_err(cx)
1340                                    });
1341                                }
1342                            }
1343                        }
1344                        LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id } => {
1345                            let buffer = this.update(&mut cx, |this, _| {
1346                                let buffer = this.opened_buffers.get(&buffer_id).unwrap();
1347                                let shared_buffers =
1348                                    this.shared_buffers.entry(peer_id).or_default();
1349                                if shared_buffers.insert(buffer_id) {
1350                                    if let OpenBuffer::Strong(buffer) = buffer {
1351                                        Some(buffer.clone())
1352                                    } else {
1353                                        None
1354                                    }
1355                                } else {
1356                                    None
1357                                }
1358                            });
1359
1360                            let Some(buffer) = buffer else { continue };
1361                            let operations =
1362                                buffer.read_with(&cx, |b, cx| b.serialize_ops(None, cx));
1363                            let operations = operations.await;
1364                            let state = buffer.read_with(&cx, |buffer, _| buffer.to_proto());
1365
1366                            let initial_state = proto::CreateBufferForPeer {
1367                                project_id,
1368                                peer_id: Some(peer_id),
1369                                variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1370                            };
1371                            if client.send(initial_state).log_err().is_some() {
1372                                let client = client.clone();
1373                                cx.background()
1374                                    .spawn(async move {
1375                                        let mut chunks = split_operations(operations).peekable();
1376                                        while let Some(chunk) = chunks.next() {
1377                                            let is_last = chunks.peek().is_none();
1378                                            client.send(proto::CreateBufferForPeer {
1379                                                project_id,
1380                                                peer_id: Some(peer_id),
1381                                                variant: Some(
1382                                                    proto::create_buffer_for_peer::Variant::Chunk(
1383                                                        proto::BufferChunk {
1384                                                            buffer_id,
1385                                                            operations: chunk,
1386                                                            is_last,
1387                                                        },
1388                                                    ),
1389                                                ),
1390                                            })?;
1391                                        }
1392                                        anyhow::Ok(())
1393                                    })
1394                                    .await
1395                                    .log_err();
1396                            }
1397                        }
1398                    }
1399                }
1400            }),
1401        });
1402
1403        self.metadata_changed(cx);
1404        cx.emit(Event::RemoteIdChanged(Some(project_id)));
1405        cx.notify();
1406        Ok(())
1407    }
1408
1409    pub fn reshared(
1410        &mut self,
1411        message: proto::ResharedProject,
1412        cx: &mut ModelContext<Self>,
1413    ) -> Result<()> {
1414        self.shared_buffers.clear();
1415        self.set_collaborators_from_proto(message.collaborators, cx)?;
1416        self.metadata_changed(cx);
1417        Ok(())
1418    }
1419
1420    pub fn rejoined(
1421        &mut self,
1422        message: proto::RejoinedProject,
1423        message_id: u32,
1424        cx: &mut ModelContext<Self>,
1425    ) -> Result<()> {
1426        cx.update_global::<SettingsStore, _, _>(|store, cx| {
1427            for worktree in &self.worktrees {
1428                store
1429                    .clear_local_settings(worktree.handle_id(), cx)
1430                    .log_err();
1431            }
1432        });
1433
1434        self.join_project_response_message_id = message_id;
1435        self.set_worktrees_from_proto(message.worktrees, cx)?;
1436        self.set_collaborators_from_proto(message.collaborators, cx)?;
1437        self.language_server_statuses = message
1438            .language_servers
1439            .into_iter()
1440            .map(|server| {
1441                (
1442                    LanguageServerId(server.id as usize),
1443                    LanguageServerStatus {
1444                        name: server.name,
1445                        pending_work: Default::default(),
1446                        has_pending_diagnostic_updates: false,
1447                        progress_tokens: Default::default(),
1448                    },
1449                )
1450            })
1451            .collect();
1452        self.buffer_ordered_messages_tx
1453            .unbounded_send(BufferOrderedMessage::Resync)
1454            .unwrap();
1455        cx.notify();
1456        Ok(())
1457    }
1458
1459    pub fn unshare(&mut self, cx: &mut ModelContext<Self>) -> Result<()> {
1460        self.unshare_internal(cx)?;
1461        self.metadata_changed(cx);
1462        cx.notify();
1463        Ok(())
1464    }
1465
1466    fn unshare_internal(&mut self, cx: &mut AppContext) -> Result<()> {
1467        if self.is_remote() {
1468            return Err(anyhow!("attempted to unshare a remote project"));
1469        }
1470
1471        if let Some(ProjectClientState::Local { remote_id, .. }) = self.client_state.take() {
1472            self.collaborators.clear();
1473            self.shared_buffers.clear();
1474            self.client_subscriptions.clear();
1475
1476            for worktree_handle in self.worktrees.iter_mut() {
1477                if let WorktreeHandle::Strong(worktree) = worktree_handle {
1478                    let is_visible = worktree.update(cx, |worktree, _| {
1479                        worktree.as_local_mut().unwrap().unshare();
1480                        worktree.is_visible()
1481                    });
1482                    if !is_visible {
1483                        *worktree_handle = WorktreeHandle::Weak(worktree.downgrade());
1484                    }
1485                }
1486            }
1487
1488            for open_buffer in self.opened_buffers.values_mut() {
1489                // Wake up any tasks waiting for peers' edits to this buffer.
1490                if let Some(buffer) = open_buffer.upgrade(cx) {
1491                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1492                }
1493
1494                if let OpenBuffer::Strong(buffer) = open_buffer {
1495                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1496                }
1497            }
1498
1499            self.client.send(proto::UnshareProject {
1500                project_id: remote_id,
1501            })?;
1502
1503            Ok(())
1504        } else {
1505            Err(anyhow!("attempted to unshare an unshared project"))
1506        }
1507    }
1508
1509    pub fn disconnected_from_host(&mut self, cx: &mut ModelContext<Self>) {
1510        self.disconnected_from_host_internal(cx);
1511        cx.emit(Event::DisconnectedFromHost);
1512        cx.notify();
1513    }
1514
1515    fn disconnected_from_host_internal(&mut self, cx: &mut AppContext) {
1516        if let Some(ProjectClientState::Remote {
1517            sharing_has_stopped,
1518            ..
1519        }) = &mut self.client_state
1520        {
1521            *sharing_has_stopped = true;
1522
1523            self.collaborators.clear();
1524
1525            for worktree in &self.worktrees {
1526                if let Some(worktree) = worktree.upgrade(cx) {
1527                    worktree.update(cx, |worktree, _| {
1528                        if let Some(worktree) = worktree.as_remote_mut() {
1529                            worktree.disconnected_from_host();
1530                        }
1531                    });
1532                }
1533            }
1534
1535            for open_buffer in self.opened_buffers.values_mut() {
1536                // Wake up any tasks waiting for peers' edits to this buffer.
1537                if let Some(buffer) = open_buffer.upgrade(cx) {
1538                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1539                }
1540
1541                if let OpenBuffer::Strong(buffer) = open_buffer {
1542                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1543                }
1544            }
1545
1546            // Wake up all futures currently waiting on a buffer to get opened,
1547            // to give them a chance to fail now that we've disconnected.
1548            *self.opened_buffer.0.borrow_mut() = ();
1549        }
1550    }
1551
1552    pub fn close(&mut self, cx: &mut ModelContext<Self>) {
1553        cx.emit(Event::Closed);
1554    }
1555
1556    pub fn is_read_only(&self) -> bool {
1557        match &self.client_state {
1558            Some(ProjectClientState::Remote {
1559                sharing_has_stopped,
1560                ..
1561            }) => *sharing_has_stopped,
1562            _ => false,
1563        }
1564    }
1565
1566    pub fn is_local(&self) -> bool {
1567        match &self.client_state {
1568            Some(ProjectClientState::Remote { .. }) => false,
1569            _ => true,
1570        }
1571    }
1572
1573    pub fn is_remote(&self) -> bool {
1574        !self.is_local()
1575    }
1576
1577    pub fn create_buffer(
1578        &mut self,
1579        text: &str,
1580        language: Option<Arc<Language>>,
1581        cx: &mut ModelContext<Self>,
1582    ) -> Result<ModelHandle<Buffer>> {
1583        if self.is_remote() {
1584            return Err(anyhow!("creating buffers as a guest is not supported yet"));
1585        }
1586        let id = post_inc(&mut self.next_buffer_id);
1587        let buffer = cx.add_model(|cx| {
1588            Buffer::new(self.replica_id(), id, text)
1589                .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1590        });
1591        self.register_buffer(&buffer, cx)?;
1592        Ok(buffer)
1593    }
1594
1595    pub fn open_path(
1596        &mut self,
1597        path: impl Into<ProjectPath>,
1598        cx: &mut ModelContext<Self>,
1599    ) -> Task<Result<(ProjectEntryId, AnyModelHandle)>> {
1600        let task = self.open_buffer(path, cx);
1601        cx.spawn_weak(|_, cx| async move {
1602            let buffer = task.await?;
1603            let project_entry_id = buffer
1604                .read_with(&cx, |buffer, cx| {
1605                    File::from_dyn(buffer.file()).and_then(|file| file.project_entry_id(cx))
1606                })
1607                .ok_or_else(|| anyhow!("no project entry"))?;
1608
1609            let buffer: &AnyModelHandle = &buffer;
1610            Ok((project_entry_id, buffer.clone()))
1611        })
1612    }
1613
1614    pub fn open_local_buffer(
1615        &mut self,
1616        abs_path: impl AsRef<Path>,
1617        cx: &mut ModelContext<Self>,
1618    ) -> Task<Result<ModelHandle<Buffer>>> {
1619        if let Some((worktree, relative_path)) = self.find_local_worktree(abs_path.as_ref(), cx) {
1620            self.open_buffer((worktree.read(cx).id(), relative_path), cx)
1621        } else {
1622            Task::ready(Err(anyhow!("no such path")))
1623        }
1624    }
1625
1626    pub fn open_buffer(
1627        &mut self,
1628        path: impl Into<ProjectPath>,
1629        cx: &mut ModelContext<Self>,
1630    ) -> Task<Result<ModelHandle<Buffer>>> {
1631        let project_path = path.into();
1632        let worktree = if let Some(worktree) = self.worktree_for_id(project_path.worktree_id, cx) {
1633            worktree
1634        } else {
1635            return Task::ready(Err(anyhow!("no such worktree")));
1636        };
1637
1638        // If there is already a buffer for the given path, then return it.
1639        let existing_buffer = self.get_open_buffer(&project_path, cx);
1640        if let Some(existing_buffer) = existing_buffer {
1641            return Task::ready(Ok(existing_buffer));
1642        }
1643
1644        let loading_watch = match self.loading_buffers_by_path.entry(project_path.clone()) {
1645            // If the given path is already being loaded, then wait for that existing
1646            // task to complete and return the same buffer.
1647            hash_map::Entry::Occupied(e) => e.get().clone(),
1648
1649            // Otherwise, record the fact that this path is now being loaded.
1650            hash_map::Entry::Vacant(entry) => {
1651                let (mut tx, rx) = postage::watch::channel();
1652                entry.insert(rx.clone());
1653
1654                let load_buffer = if worktree.read(cx).is_local() {
1655                    self.open_local_buffer_internal(&project_path.path, &worktree, cx)
1656                } else {
1657                    self.open_remote_buffer_internal(&project_path.path, &worktree, cx)
1658                };
1659
1660                cx.spawn(move |this, mut cx| async move {
1661                    let load_result = load_buffer.await;
1662                    *tx.borrow_mut() = Some(this.update(&mut cx, |this, _| {
1663                        // Record the fact that the buffer is no longer loading.
1664                        this.loading_buffers_by_path.remove(&project_path);
1665                        let buffer = load_result.map_err(Arc::new)?;
1666                        Ok(buffer)
1667                    }));
1668                })
1669                .detach();
1670                rx
1671            }
1672        };
1673
1674        cx.foreground().spawn(async move {
1675            wait_for_loading_buffer(loading_watch)
1676                .await
1677                .map_err(|error| anyhow!("{}", error))
1678        })
1679    }
1680
1681    fn open_local_buffer_internal(
1682        &mut self,
1683        path: &Arc<Path>,
1684        worktree: &ModelHandle<Worktree>,
1685        cx: &mut ModelContext<Self>,
1686    ) -> Task<Result<ModelHandle<Buffer>>> {
1687        let buffer_id = post_inc(&mut self.next_buffer_id);
1688        let load_buffer = worktree.update(cx, |worktree, cx| {
1689            let worktree = worktree.as_local_mut().unwrap();
1690            worktree.load_buffer(buffer_id, path, cx)
1691        });
1692        cx.spawn(|this, mut cx| async move {
1693            let buffer = load_buffer.await?;
1694            this.update(&mut cx, |this, cx| this.register_buffer(&buffer, cx))?;
1695            Ok(buffer)
1696        })
1697    }
1698
1699    fn open_remote_buffer_internal(
1700        &mut self,
1701        path: &Arc<Path>,
1702        worktree: &ModelHandle<Worktree>,
1703        cx: &mut ModelContext<Self>,
1704    ) -> Task<Result<ModelHandle<Buffer>>> {
1705        let rpc = self.client.clone();
1706        let project_id = self.remote_id().unwrap();
1707        let remote_worktree_id = worktree.read(cx).id();
1708        let path = path.clone();
1709        let path_string = path.to_string_lossy().to_string();
1710        cx.spawn(|this, mut cx| async move {
1711            let response = rpc
1712                .request(proto::OpenBufferByPath {
1713                    project_id,
1714                    worktree_id: remote_worktree_id.to_proto(),
1715                    path: path_string,
1716                })
1717                .await?;
1718            this.update(&mut cx, |this, cx| {
1719                this.wait_for_remote_buffer(response.buffer_id, cx)
1720            })
1721            .await
1722        })
1723    }
1724
1725    /// LanguageServerName is owned, because it is inserted into a map
1726    pub fn open_local_buffer_via_lsp(
1727        &mut self,
1728        abs_path: lsp::Url,
1729        language_server_id: LanguageServerId,
1730        language_server_name: LanguageServerName,
1731        cx: &mut ModelContext<Self>,
1732    ) -> Task<Result<ModelHandle<Buffer>>> {
1733        cx.spawn(|this, mut cx| async move {
1734            let abs_path = abs_path
1735                .to_file_path()
1736                .map_err(|_| anyhow!("can't convert URI to path"))?;
1737            let (worktree, relative_path) = if let Some(result) =
1738                this.read_with(&cx, |this, cx| this.find_local_worktree(&abs_path, cx))
1739            {
1740                result
1741            } else {
1742                let worktree = this
1743                    .update(&mut cx, |this, cx| {
1744                        this.create_local_worktree(&abs_path, false, cx)
1745                    })
1746                    .await?;
1747                this.update(&mut cx, |this, cx| {
1748                    this.language_server_ids.insert(
1749                        (worktree.read(cx).id(), language_server_name),
1750                        language_server_id,
1751                    );
1752                });
1753                (worktree, PathBuf::new())
1754            };
1755
1756            let project_path = ProjectPath {
1757                worktree_id: worktree.read_with(&cx, |worktree, _| worktree.id()),
1758                path: relative_path.into(),
1759            };
1760            this.update(&mut cx, |this, cx| this.open_buffer(project_path, cx))
1761                .await
1762        })
1763    }
1764
1765    pub fn open_buffer_by_id(
1766        &mut self,
1767        id: u64,
1768        cx: &mut ModelContext<Self>,
1769    ) -> Task<Result<ModelHandle<Buffer>>> {
1770        if let Some(buffer) = self.buffer_for_id(id, cx) {
1771            Task::ready(Ok(buffer))
1772        } else if self.is_local() {
1773            Task::ready(Err(anyhow!("buffer {} does not exist", id)))
1774        } else if let Some(project_id) = self.remote_id() {
1775            let request = self
1776                .client
1777                .request(proto::OpenBufferById { project_id, id });
1778            cx.spawn(|this, mut cx| async move {
1779                let buffer_id = request.await?.buffer_id;
1780                this.update(&mut cx, |this, cx| {
1781                    this.wait_for_remote_buffer(buffer_id, cx)
1782                })
1783                .await
1784            })
1785        } else {
1786            Task::ready(Err(anyhow!("cannot open buffer while disconnected")))
1787        }
1788    }
1789
1790    pub fn save_buffers(
1791        &self,
1792        buffers: HashSet<ModelHandle<Buffer>>,
1793        cx: &mut ModelContext<Self>,
1794    ) -> Task<Result<()>> {
1795        cx.spawn(|this, mut cx| async move {
1796            let save_tasks = buffers
1797                .into_iter()
1798                .map(|buffer| this.update(&mut cx, |this, cx| this.save_buffer(buffer, cx)));
1799            try_join_all(save_tasks).await?;
1800            Ok(())
1801        })
1802    }
1803
1804    pub fn save_buffer(
1805        &self,
1806        buffer: ModelHandle<Buffer>,
1807        cx: &mut ModelContext<Self>,
1808    ) -> Task<Result<()>> {
1809        let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
1810            return Task::ready(Err(anyhow!("buffer doesn't have a file")));
1811        };
1812        let worktree = file.worktree.clone();
1813        let path = file.path.clone();
1814        worktree.update(cx, |worktree, cx| match worktree {
1815            Worktree::Local(worktree) => worktree.save_buffer(buffer, path, false, cx),
1816            Worktree::Remote(worktree) => worktree.save_buffer(buffer, cx),
1817        })
1818    }
1819
1820    pub fn save_buffer_as(
1821        &mut self,
1822        buffer: ModelHandle<Buffer>,
1823        abs_path: PathBuf,
1824        cx: &mut ModelContext<Self>,
1825    ) -> Task<Result<()>> {
1826        let worktree_task = self.find_or_create_local_worktree(&abs_path, true, cx);
1827        let old_file = File::from_dyn(buffer.read(cx).file())
1828            .filter(|f| f.is_local())
1829            .cloned();
1830        cx.spawn(|this, mut cx| async move {
1831            if let Some(old_file) = &old_file {
1832                this.update(&mut cx, |this, cx| {
1833                    this.unregister_buffer_from_language_servers(&buffer, old_file, cx);
1834                });
1835            }
1836            let (worktree, path) = worktree_task.await?;
1837            worktree
1838                .update(&mut cx, |worktree, cx| match worktree {
1839                    Worktree::Local(worktree) => {
1840                        worktree.save_buffer(buffer.clone(), path.into(), true, cx)
1841                    }
1842                    Worktree::Remote(_) => panic!("cannot remote buffers as new files"),
1843                })
1844                .await?;
1845
1846            this.update(&mut cx, |this, cx| {
1847                this.detect_language_for_buffer(&buffer, cx);
1848                this.register_buffer_with_language_servers(&buffer, cx);
1849            });
1850            Ok(())
1851        })
1852    }
1853
1854    pub fn get_open_buffer(
1855        &mut self,
1856        path: &ProjectPath,
1857        cx: &mut ModelContext<Self>,
1858    ) -> Option<ModelHandle<Buffer>> {
1859        let worktree = self.worktree_for_id(path.worktree_id, cx)?;
1860        self.opened_buffers.values().find_map(|buffer| {
1861            let buffer = buffer.upgrade(cx)?;
1862            let file = File::from_dyn(buffer.read(cx).file())?;
1863            if file.worktree == worktree && file.path() == &path.path {
1864                Some(buffer)
1865            } else {
1866                None
1867            }
1868        })
1869    }
1870
1871    fn register_buffer(
1872        &mut self,
1873        buffer: &ModelHandle<Buffer>,
1874        cx: &mut ModelContext<Self>,
1875    ) -> Result<()> {
1876        self.request_buffer_diff_recalculation(buffer, cx);
1877        buffer.update(cx, |buffer, _| {
1878            buffer.set_language_registry(self.languages.clone())
1879        });
1880
1881        let remote_id = buffer.read(cx).remote_id();
1882        let is_remote = self.is_remote();
1883        let open_buffer = if is_remote || self.is_shared() {
1884            OpenBuffer::Strong(buffer.clone())
1885        } else {
1886            OpenBuffer::Weak(buffer.downgrade())
1887        };
1888
1889        match self.opened_buffers.entry(remote_id) {
1890            hash_map::Entry::Vacant(entry) => {
1891                entry.insert(open_buffer);
1892            }
1893            hash_map::Entry::Occupied(mut entry) => {
1894                if let OpenBuffer::Operations(operations) = entry.get_mut() {
1895                    buffer.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx))?;
1896                } else if entry.get().upgrade(cx).is_some() {
1897                    if is_remote {
1898                        return Ok(());
1899                    } else {
1900                        debug_panic!("buffer {} was already registered", remote_id);
1901                        Err(anyhow!("buffer {} was already registered", remote_id))?;
1902                    }
1903                }
1904                entry.insert(open_buffer);
1905            }
1906        }
1907        cx.subscribe(buffer, |this, buffer, event, cx| {
1908            this.on_buffer_event(buffer, event, cx);
1909        })
1910        .detach();
1911
1912        if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1913            if file.is_local {
1914                self.local_buffer_ids_by_path.insert(
1915                    ProjectPath {
1916                        worktree_id: file.worktree_id(cx),
1917                        path: file.path.clone(),
1918                    },
1919                    remote_id,
1920                );
1921
1922                self.local_buffer_ids_by_entry_id
1923                    .insert(file.entry_id, remote_id);
1924            }
1925        }
1926
1927        self.detect_language_for_buffer(buffer, cx);
1928        self.register_buffer_with_language_servers(buffer, cx);
1929        self.register_buffer_with_copilot(buffer, cx);
1930        cx.observe_release(buffer, |this, buffer, cx| {
1931            if let Some(file) = File::from_dyn(buffer.file()) {
1932                if file.is_local() {
1933                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
1934                    for server in this.language_servers_for_buffer(buffer, cx) {
1935                        server
1936                            .1
1937                            .notify::<lsp::notification::DidCloseTextDocument>(
1938                                lsp::DidCloseTextDocumentParams {
1939                                    text_document: lsp::TextDocumentIdentifier::new(uri.clone()),
1940                                },
1941                            )
1942                            .log_err();
1943                    }
1944                }
1945            }
1946        })
1947        .detach();
1948
1949        *self.opened_buffer.0.borrow_mut() = ();
1950        Ok(())
1951    }
1952
1953    fn register_buffer_with_language_servers(
1954        &mut self,
1955        buffer_handle: &ModelHandle<Buffer>,
1956        cx: &mut ModelContext<Self>,
1957    ) {
1958        let buffer = buffer_handle.read(cx);
1959        let buffer_id = buffer.remote_id();
1960
1961        if let Some(file) = File::from_dyn(buffer.file()) {
1962            if !file.is_local() {
1963                return;
1964            }
1965
1966            let abs_path = file.abs_path(cx);
1967            let uri = lsp::Url::from_file_path(&abs_path)
1968                .unwrap_or_else(|()| panic!("Failed to register file {abs_path:?}"));
1969            let initial_snapshot = buffer.text_snapshot();
1970            let language = buffer.language().cloned();
1971            let worktree_id = file.worktree_id(cx);
1972
1973            if let Some(local_worktree) = file.worktree.read(cx).as_local() {
1974                for (server_id, diagnostics) in local_worktree.diagnostics_for_path(file.path()) {
1975                    self.update_buffer_diagnostics(buffer_handle, server_id, None, diagnostics, cx)
1976                        .log_err();
1977                }
1978            }
1979
1980            if let Some(language) = language {
1981                for adapter in language.lsp_adapters() {
1982                    let language_id = adapter.language_ids.get(language.name().as_ref()).cloned();
1983                    let server = self
1984                        .language_server_ids
1985                        .get(&(worktree_id, adapter.name.clone()))
1986                        .and_then(|id| self.language_servers.get(id))
1987                        .and_then(|server_state| {
1988                            if let LanguageServerState::Running { server, .. } = server_state {
1989                                Some(server.clone())
1990                            } else {
1991                                None
1992                            }
1993                        });
1994                    let server = match server {
1995                        Some(server) => server,
1996                        None => continue,
1997                    };
1998
1999                    server
2000                        .notify::<lsp::notification::DidOpenTextDocument>(
2001                            lsp::DidOpenTextDocumentParams {
2002                                text_document: lsp::TextDocumentItem::new(
2003                                    uri.clone(),
2004                                    language_id.unwrap_or_default(),
2005                                    0,
2006                                    initial_snapshot.text(),
2007                                ),
2008                            },
2009                        )
2010                        .log_err();
2011
2012                    buffer_handle.update(cx, |buffer, cx| {
2013                        buffer.set_completion_triggers(
2014                            server
2015                                .capabilities()
2016                                .completion_provider
2017                                .as_ref()
2018                                .and_then(|provider| provider.trigger_characters.clone())
2019                                .unwrap_or_default(),
2020                            cx,
2021                        );
2022                    });
2023
2024                    let snapshot = LspBufferSnapshot {
2025                        version: 0,
2026                        snapshot: initial_snapshot.clone(),
2027                    };
2028                    self.buffer_snapshots
2029                        .entry(buffer_id)
2030                        .or_default()
2031                        .insert(server.server_id(), vec![snapshot]);
2032                }
2033            }
2034        }
2035    }
2036
2037    fn unregister_buffer_from_language_servers(
2038        &mut self,
2039        buffer: &ModelHandle<Buffer>,
2040        old_file: &File,
2041        cx: &mut ModelContext<Self>,
2042    ) {
2043        let old_path = match old_file.as_local() {
2044            Some(local) => local.abs_path(cx),
2045            None => return,
2046        };
2047
2048        buffer.update(cx, |buffer, cx| {
2049            let worktree_id = old_file.worktree_id(cx);
2050            let ids = &self.language_server_ids;
2051
2052            let language = buffer.language().cloned();
2053            let adapters = language.iter().flat_map(|language| language.lsp_adapters());
2054            for &server_id in adapters.flat_map(|a| ids.get(&(worktree_id, a.name.clone()))) {
2055                buffer.update_diagnostics(server_id, Default::default(), cx);
2056            }
2057
2058            self.buffer_snapshots.remove(&buffer.remote_id());
2059            let file_url = lsp::Url::from_file_path(old_path).unwrap();
2060            for (_, language_server) in self.language_servers_for_buffer(buffer, cx) {
2061                language_server
2062                    .notify::<lsp::notification::DidCloseTextDocument>(
2063                        lsp::DidCloseTextDocumentParams {
2064                            text_document: lsp::TextDocumentIdentifier::new(file_url.clone()),
2065                        },
2066                    )
2067                    .log_err();
2068            }
2069        });
2070    }
2071
2072    fn register_buffer_with_copilot(
2073        &self,
2074        buffer_handle: &ModelHandle<Buffer>,
2075        cx: &mut ModelContext<Self>,
2076    ) {
2077        if let Some(copilot) = Copilot::global(cx) {
2078            copilot.update(cx, |copilot, cx| copilot.register_buffer(buffer_handle, cx));
2079        }
2080    }
2081
2082    async fn send_buffer_ordered_messages(
2083        this: WeakModelHandle<Self>,
2084        rx: UnboundedReceiver<BufferOrderedMessage>,
2085        mut cx: AsyncAppContext,
2086    ) -> Option<()> {
2087        const MAX_BATCH_SIZE: usize = 128;
2088
2089        let mut operations_by_buffer_id = HashMap::default();
2090        async fn flush_operations(
2091            this: &ModelHandle<Project>,
2092            operations_by_buffer_id: &mut HashMap<u64, Vec<proto::Operation>>,
2093            needs_resync_with_host: &mut bool,
2094            is_local: bool,
2095            cx: &AsyncAppContext,
2096        ) {
2097            for (buffer_id, operations) in operations_by_buffer_id.drain() {
2098                let request = this.read_with(cx, |this, _| {
2099                    let project_id = this.remote_id()?;
2100                    Some(this.client.request(proto::UpdateBuffer {
2101                        buffer_id,
2102                        project_id,
2103                        operations,
2104                    }))
2105                });
2106                if let Some(request) = request {
2107                    if request.await.is_err() && !is_local {
2108                        *needs_resync_with_host = true;
2109                        break;
2110                    }
2111                }
2112            }
2113        }
2114
2115        let mut needs_resync_with_host = false;
2116        let mut changes = rx.ready_chunks(MAX_BATCH_SIZE);
2117
2118        while let Some(changes) = changes.next().await {
2119            let this = this.upgrade(&mut cx)?;
2120            let is_local = this.read_with(&cx, |this, _| this.is_local());
2121
2122            for change in changes {
2123                match change {
2124                    BufferOrderedMessage::Operation {
2125                        buffer_id,
2126                        operation,
2127                    } => {
2128                        if needs_resync_with_host {
2129                            continue;
2130                        }
2131
2132                        operations_by_buffer_id
2133                            .entry(buffer_id)
2134                            .or_insert(Vec::new())
2135                            .push(operation);
2136                    }
2137
2138                    BufferOrderedMessage::Resync => {
2139                        operations_by_buffer_id.clear();
2140                        if this
2141                            .update(&mut cx, |this, cx| this.synchronize_remote_buffers(cx))
2142                            .await
2143                            .is_ok()
2144                        {
2145                            needs_resync_with_host = false;
2146                        }
2147                    }
2148
2149                    BufferOrderedMessage::LanguageServerUpdate {
2150                        language_server_id,
2151                        message,
2152                    } => {
2153                        flush_operations(
2154                            &this,
2155                            &mut operations_by_buffer_id,
2156                            &mut needs_resync_with_host,
2157                            is_local,
2158                            &cx,
2159                        )
2160                        .await;
2161
2162                        this.read_with(&cx, |this, _| {
2163                            if let Some(project_id) = this.remote_id() {
2164                                this.client
2165                                    .send(proto::UpdateLanguageServer {
2166                                        project_id,
2167                                        language_server_id: language_server_id.0 as u64,
2168                                        variant: Some(message),
2169                                    })
2170                                    .log_err();
2171                            }
2172                        });
2173                    }
2174                }
2175            }
2176
2177            flush_operations(
2178                &this,
2179                &mut operations_by_buffer_id,
2180                &mut needs_resync_with_host,
2181                is_local,
2182                &cx,
2183            )
2184            .await;
2185        }
2186
2187        None
2188    }
2189
2190    fn on_buffer_event(
2191        &mut self,
2192        buffer: ModelHandle<Buffer>,
2193        event: &BufferEvent,
2194        cx: &mut ModelContext<Self>,
2195    ) -> Option<()> {
2196        if matches!(
2197            event,
2198            BufferEvent::Edited { .. } | BufferEvent::Reloaded | BufferEvent::DiffBaseChanged
2199        ) {
2200            self.request_buffer_diff_recalculation(&buffer, cx);
2201        }
2202
2203        match event {
2204            BufferEvent::Operation(operation) => {
2205                self.buffer_ordered_messages_tx
2206                    .unbounded_send(BufferOrderedMessage::Operation {
2207                        buffer_id: buffer.read(cx).remote_id(),
2208                        operation: language::proto::serialize_operation(operation),
2209                    })
2210                    .ok();
2211            }
2212
2213            BufferEvent::Edited { .. } => {
2214                let buffer = buffer.read(cx);
2215                let file = File::from_dyn(buffer.file())?;
2216                let abs_path = file.as_local()?.abs_path(cx);
2217                let uri = lsp::Url::from_file_path(abs_path).unwrap();
2218                let next_snapshot = buffer.text_snapshot();
2219
2220                let language_servers: Vec<_> = self
2221                    .language_servers_for_buffer(buffer, cx)
2222                    .map(|i| i.1.clone())
2223                    .collect();
2224
2225                for language_server in language_servers {
2226                    let language_server = language_server.clone();
2227
2228                    let buffer_snapshots = self
2229                        .buffer_snapshots
2230                        .get_mut(&buffer.remote_id())
2231                        .and_then(|m| m.get_mut(&language_server.server_id()))?;
2232                    let previous_snapshot = buffer_snapshots.last()?;
2233
2234                    let build_incremental_change = || {
2235                        buffer
2236                            .edits_since::<(PointUtf16, usize)>(
2237                                previous_snapshot.snapshot.version(),
2238                            )
2239                            .map(|edit| {
2240                                let edit_start = edit.new.start.0;
2241                                let edit_end = edit_start + (edit.old.end.0 - edit.old.start.0);
2242                                let new_text = next_snapshot
2243                                    .text_for_range(edit.new.start.1..edit.new.end.1)
2244                                    .collect();
2245                                lsp::TextDocumentContentChangeEvent {
2246                                    range: Some(lsp::Range::new(
2247                                        point_to_lsp(edit_start),
2248                                        point_to_lsp(edit_end),
2249                                    )),
2250                                    range_length: None,
2251                                    text: new_text,
2252                                }
2253                            })
2254                            .collect()
2255                    };
2256
2257                    let document_sync_kind = language_server
2258                        .capabilities()
2259                        .text_document_sync
2260                        .as_ref()
2261                        .and_then(|sync| match sync {
2262                            lsp::TextDocumentSyncCapability::Kind(kind) => Some(*kind),
2263                            lsp::TextDocumentSyncCapability::Options(options) => options.change,
2264                        });
2265
2266                    let content_changes: Vec<_> = match document_sync_kind {
2267                        Some(lsp::TextDocumentSyncKind::FULL) => {
2268                            vec![lsp::TextDocumentContentChangeEvent {
2269                                range: None,
2270                                range_length: None,
2271                                text: next_snapshot.text(),
2272                            }]
2273                        }
2274                        Some(lsp::TextDocumentSyncKind::INCREMENTAL) => build_incremental_change(),
2275                        _ => {
2276                            #[cfg(any(test, feature = "test-support"))]
2277                            {
2278                                build_incremental_change()
2279                            }
2280
2281                            #[cfg(not(any(test, feature = "test-support")))]
2282                            {
2283                                continue;
2284                            }
2285                        }
2286                    };
2287
2288                    let next_version = previous_snapshot.version + 1;
2289
2290                    buffer_snapshots.push(LspBufferSnapshot {
2291                        version: next_version,
2292                        snapshot: next_snapshot.clone(),
2293                    });
2294
2295                    language_server
2296                        .notify::<lsp::notification::DidChangeTextDocument>(
2297                            lsp::DidChangeTextDocumentParams {
2298                                text_document: lsp::VersionedTextDocumentIdentifier::new(
2299                                    uri.clone(),
2300                                    next_version,
2301                                ),
2302                                content_changes,
2303                            },
2304                        )
2305                        .log_err();
2306                }
2307            }
2308
2309            BufferEvent::Saved => {
2310                let file = File::from_dyn(buffer.read(cx).file())?;
2311                let worktree_id = file.worktree_id(cx);
2312                let abs_path = file.as_local()?.abs_path(cx);
2313                let text_document = lsp::TextDocumentIdentifier {
2314                    uri: lsp::Url::from_file_path(abs_path).unwrap(),
2315                };
2316
2317                for (_, _, server) in self.language_servers_for_worktree(worktree_id) {
2318                    let text = include_text(server.as_ref()).then(|| buffer.read(cx).text());
2319
2320                    server
2321                        .notify::<lsp::notification::DidSaveTextDocument>(
2322                            lsp::DidSaveTextDocumentParams {
2323                                text_document: text_document.clone(),
2324                                text,
2325                            },
2326                        )
2327                        .log_err();
2328                }
2329
2330                let language_server_ids = self.language_server_ids_for_buffer(buffer.read(cx), cx);
2331                for language_server_id in language_server_ids {
2332                    if let Some(LanguageServerState::Running {
2333                        adapter,
2334                        simulate_disk_based_diagnostics_completion,
2335                        ..
2336                    }) = self.language_servers.get_mut(&language_server_id)
2337                    {
2338                        // After saving a buffer using a language server that doesn't provide
2339                        // a disk-based progress token, kick off a timer that will reset every
2340                        // time the buffer is saved. If the timer eventually fires, simulate
2341                        // disk-based diagnostics being finished so that other pieces of UI
2342                        // (e.g., project diagnostics view, diagnostic status bar) can update.
2343                        // We don't emit an event right away because the language server might take
2344                        // some time to publish diagnostics.
2345                        if adapter.disk_based_diagnostics_progress_token.is_none() {
2346                            const DISK_BASED_DIAGNOSTICS_DEBOUNCE: Duration =
2347                                Duration::from_secs(1);
2348
2349                            let task = cx.spawn_weak(|this, mut cx| async move {
2350                                cx.background().timer(DISK_BASED_DIAGNOSTICS_DEBOUNCE).await;
2351                                if let Some(this) = this.upgrade(&cx) {
2352                                    this.update(&mut cx, |this, cx| {
2353                                        this.disk_based_diagnostics_finished(
2354                                            language_server_id,
2355                                            cx,
2356                                        );
2357                                        this.buffer_ordered_messages_tx
2358                                            .unbounded_send(
2359                                                BufferOrderedMessage::LanguageServerUpdate {
2360                                                    language_server_id,
2361                                                    message:proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(Default::default())
2362                                                },
2363                                            )
2364                                            .ok();
2365                                    });
2366                                }
2367                            });
2368                            *simulate_disk_based_diagnostics_completion = Some(task);
2369                        }
2370                    }
2371                }
2372            }
2373            BufferEvent::FileHandleChanged => {
2374                let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
2375                    return None;
2376                };
2377
2378                match self.local_buffer_ids_by_entry_id.get(&file.entry_id) {
2379                    Some(_) => {
2380                        return None;
2381                    }
2382                    None => {
2383                        let remote_id = buffer.read(cx).remote_id();
2384                        self.local_buffer_ids_by_entry_id
2385                            .insert(file.entry_id, remote_id);
2386
2387                        self.local_buffer_ids_by_path.insert(
2388                            ProjectPath {
2389                                worktree_id: file.worktree_id(cx),
2390                                path: file.path.clone(),
2391                            },
2392                            remote_id,
2393                        );
2394                    }
2395                }
2396            }
2397            _ => {}
2398        }
2399
2400        None
2401    }
2402
2403    fn request_buffer_diff_recalculation(
2404        &mut self,
2405        buffer: &ModelHandle<Buffer>,
2406        cx: &mut ModelContext<Self>,
2407    ) {
2408        self.buffers_needing_diff.insert(buffer.downgrade());
2409        let first_insertion = self.buffers_needing_diff.len() == 1;
2410
2411        let settings = settings::get::<ProjectSettings>(cx);
2412        let delay = if let Some(delay) = settings.git.gutter_debounce {
2413            delay
2414        } else {
2415            if first_insertion {
2416                let this = cx.weak_handle();
2417                cx.defer(move |cx| {
2418                    if let Some(this) = this.upgrade(cx) {
2419                        this.update(cx, |this, cx| {
2420                            this.recalculate_buffer_diffs(cx).detach();
2421                        });
2422                    }
2423                });
2424            }
2425            return;
2426        };
2427
2428        const MIN_DELAY: u64 = 50;
2429        let delay = delay.max(MIN_DELAY);
2430        let duration = Duration::from_millis(delay);
2431
2432        self.git_diff_debouncer
2433            .fire_new(duration, cx, move |this, cx| {
2434                this.recalculate_buffer_diffs(cx)
2435            });
2436    }
2437
2438    fn recalculate_buffer_diffs(&mut self, cx: &mut ModelContext<Self>) -> Task<()> {
2439        cx.spawn(|this, mut cx| async move {
2440            let buffers: Vec<_> = this.update(&mut cx, |this, _| {
2441                this.buffers_needing_diff.drain().collect()
2442            });
2443
2444            let tasks: Vec<_> = this.update(&mut cx, |_, cx| {
2445                buffers
2446                    .iter()
2447                    .filter_map(|buffer| {
2448                        let buffer = buffer.upgrade(cx)?;
2449                        buffer.update(cx, |buffer, cx| buffer.git_diff_recalc(cx))
2450                    })
2451                    .collect()
2452            });
2453
2454            futures::future::join_all(tasks).await;
2455
2456            this.update(&mut cx, |this, cx| {
2457                if !this.buffers_needing_diff.is_empty() {
2458                    this.recalculate_buffer_diffs(cx).detach();
2459                } else {
2460                    // TODO: Would a `ModelContext<Project>.notify()` suffice here?
2461                    for buffer in buffers {
2462                        if let Some(buffer) = buffer.upgrade(cx) {
2463                            buffer.update(cx, |_, cx| cx.notify());
2464                        }
2465                    }
2466                }
2467            });
2468        })
2469    }
2470
2471    fn language_servers_for_worktree(
2472        &self,
2473        worktree_id: WorktreeId,
2474    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<Language>, &Arc<LanguageServer>)> {
2475        self.language_server_ids
2476            .iter()
2477            .filter_map(move |((language_server_worktree_id, _), id)| {
2478                if *language_server_worktree_id == worktree_id {
2479                    if let Some(LanguageServerState::Running {
2480                        adapter,
2481                        language,
2482                        server,
2483                        ..
2484                    }) = self.language_servers.get(id)
2485                    {
2486                        return Some((adapter, language, server));
2487                    }
2488                }
2489                None
2490            })
2491    }
2492
2493    fn maintain_buffer_languages(
2494        languages: Arc<LanguageRegistry>,
2495        cx: &mut ModelContext<Project>,
2496    ) -> Task<()> {
2497        let mut subscription = languages.subscribe();
2498        let mut prev_reload_count = languages.reload_count();
2499        cx.spawn_weak(|project, mut cx| async move {
2500            while let Some(()) = subscription.next().await {
2501                if let Some(project) = project.upgrade(&cx) {
2502                    // If the language registry has been reloaded, then remove and
2503                    // re-assign the languages on all open buffers.
2504                    let reload_count = languages.reload_count();
2505                    if reload_count > prev_reload_count {
2506                        prev_reload_count = reload_count;
2507                        project.update(&mut cx, |this, cx| {
2508                            let buffers = this
2509                                .opened_buffers
2510                                .values()
2511                                .filter_map(|b| b.upgrade(cx))
2512                                .collect::<Vec<_>>();
2513                            for buffer in buffers {
2514                                if let Some(f) = File::from_dyn(buffer.read(cx).file()).cloned() {
2515                                    this.unregister_buffer_from_language_servers(&buffer, &f, cx);
2516                                    buffer.update(cx, |buffer, cx| buffer.set_language(None, cx));
2517                                }
2518                            }
2519                        });
2520                    }
2521
2522                    project.update(&mut cx, |project, cx| {
2523                        let mut plain_text_buffers = Vec::new();
2524                        let mut buffers_with_unknown_injections = Vec::new();
2525                        for buffer in project.opened_buffers.values() {
2526                            if let Some(handle) = buffer.upgrade(cx) {
2527                                let buffer = &handle.read(cx);
2528                                if buffer.language().is_none()
2529                                    || buffer.language() == Some(&*language::PLAIN_TEXT)
2530                                {
2531                                    plain_text_buffers.push(handle);
2532                                } else if buffer.contains_unknown_injections() {
2533                                    buffers_with_unknown_injections.push(handle);
2534                                }
2535                            }
2536                        }
2537
2538                        for buffer in plain_text_buffers {
2539                            project.detect_language_for_buffer(&buffer, cx);
2540                            project.register_buffer_with_language_servers(&buffer, cx);
2541                        }
2542
2543                        for buffer in buffers_with_unknown_injections {
2544                            buffer.update(cx, |buffer, cx| buffer.reparse(cx));
2545                        }
2546                    });
2547                }
2548            }
2549        })
2550    }
2551
2552    fn maintain_workspace_config(cx: &mut ModelContext<Project>) -> Task<()> {
2553        let (mut settings_changed_tx, mut settings_changed_rx) = watch::channel();
2554        let _ = postage::stream::Stream::try_recv(&mut settings_changed_rx);
2555
2556        let settings_observation = cx.observe_global::<SettingsStore, _>(move |_, _| {
2557            *settings_changed_tx.borrow_mut() = ();
2558        });
2559
2560        cx.spawn_weak(|this, mut cx| async move {
2561            while let Some(_) = settings_changed_rx.next().await {
2562                let Some(this) = this.upgrade(&cx) else {
2563                    break;
2564                };
2565
2566                let servers: Vec<_> = this.read_with(&cx, |this, _| {
2567                    this.language_servers
2568                        .values()
2569                        .filter_map(|state| match state {
2570                            LanguageServerState::Starting(_) => None,
2571                            LanguageServerState::Running {
2572                                adapter, server, ..
2573                            } => Some((adapter.clone(), server.clone())),
2574                        })
2575                        .collect()
2576                });
2577
2578                for (adapter, server) in servers {
2579                    let workspace_config =
2580                        cx.update(|cx| adapter.workspace_configuration(cx)).await;
2581                    server
2582                        .notify::<lsp::notification::DidChangeConfiguration>(
2583                            lsp::DidChangeConfigurationParams {
2584                                settings: workspace_config.clone(),
2585                            },
2586                        )
2587                        .ok();
2588                }
2589            }
2590
2591            drop(settings_observation);
2592        })
2593    }
2594
2595    fn detect_language_for_buffer(
2596        &mut self,
2597        buffer_handle: &ModelHandle<Buffer>,
2598        cx: &mut ModelContext<Self>,
2599    ) -> Option<()> {
2600        // If the buffer has a language, set it and start the language server if we haven't already.
2601        let buffer = buffer_handle.read(cx);
2602        let full_path = buffer.file()?.full_path(cx);
2603        let content = buffer.as_rope();
2604        let new_language = self
2605            .languages
2606            .language_for_file(&full_path, Some(content))
2607            .now_or_never()?
2608            .ok()?;
2609        self.set_language_for_buffer(buffer_handle, new_language, cx);
2610        None
2611    }
2612
2613    pub fn set_language_for_buffer(
2614        &mut self,
2615        buffer: &ModelHandle<Buffer>,
2616        new_language: Arc<Language>,
2617        cx: &mut ModelContext<Self>,
2618    ) {
2619        buffer.update(cx, |buffer, cx| {
2620            if buffer.language().map_or(true, |old_language| {
2621                !Arc::ptr_eq(old_language, &new_language)
2622            }) {
2623                buffer.set_language(Some(new_language.clone()), cx);
2624            }
2625        });
2626
2627        if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
2628            let worktree = file.worktree.clone();
2629            if let Some(tree) = worktree.read(cx).as_local() {
2630                self.start_language_servers(&worktree, tree.abs_path().clone(), new_language, cx);
2631            }
2632        }
2633    }
2634
2635    fn start_language_servers(
2636        &mut self,
2637        worktree: &ModelHandle<Worktree>,
2638        worktree_path: Arc<Path>,
2639        language: Arc<Language>,
2640        cx: &mut ModelContext<Self>,
2641    ) {
2642        let root_file = worktree.update(cx, |tree, cx| tree.root_file(cx));
2643        let settings = language_settings(Some(&language), root_file.map(|f| f as _).as_ref(), cx);
2644        if !settings.enable_language_server {
2645            return;
2646        }
2647
2648        let worktree_id = worktree.read(cx).id();
2649        for adapter in language.lsp_adapters() {
2650            self.start_language_server(
2651                worktree_id,
2652                worktree_path.clone(),
2653                adapter.clone(),
2654                language.clone(),
2655                cx,
2656            );
2657        }
2658    }
2659
2660    fn start_language_server(
2661        &mut self,
2662        worktree_id: WorktreeId,
2663        worktree_path: Arc<Path>,
2664        adapter: Arc<CachedLspAdapter>,
2665        language: Arc<Language>,
2666        cx: &mut ModelContext<Self>,
2667    ) {
2668        let key = (worktree_id, adapter.name.clone());
2669        if self.language_server_ids.contains_key(&key) {
2670            return;
2671        }
2672
2673        let pending_server = match self.languages.create_pending_language_server(
2674            language.clone(),
2675            adapter.clone(),
2676            worktree_path,
2677            ProjectLspAdapterDelegate::new(self, cx),
2678            cx,
2679        ) {
2680            Some(pending_server) => pending_server,
2681            None => return,
2682        };
2683
2684        let project_settings = settings::get::<ProjectSettings>(cx);
2685        let lsp = project_settings.lsp.get(&adapter.name.0);
2686        let override_options = lsp.map(|s| s.initialization_options.clone()).flatten();
2687
2688        let mut initialization_options = adapter.initialization_options.clone();
2689        match (&mut initialization_options, override_options) {
2690            (Some(initialization_options), Some(override_options)) => {
2691                merge_json_value_into(override_options, initialization_options);
2692            }
2693            (None, override_options) => initialization_options = override_options,
2694            _ => {}
2695        }
2696
2697        let server_id = pending_server.server_id;
2698        let container_dir = pending_server.container_dir.clone();
2699        let state = LanguageServerState::Starting({
2700            let adapter = adapter.clone();
2701            let server_name = adapter.name.0.clone();
2702            let language = language.clone();
2703            let key = key.clone();
2704
2705            cx.spawn_weak(|this, mut cx| async move {
2706                let result = Self::setup_and_insert_language_server(
2707                    this,
2708                    initialization_options,
2709                    pending_server,
2710                    adapter.clone(),
2711                    language.clone(),
2712                    server_id,
2713                    key,
2714                    &mut cx,
2715                )
2716                .await;
2717
2718                match result {
2719                    Ok(server) => server,
2720
2721                    Err(err) => {
2722                        log::error!("failed to start language server {:?}: {}", server_name, err);
2723
2724                        if let Some(this) = this.upgrade(&cx) {
2725                            if let Some(container_dir) = container_dir {
2726                                let installation_test_binary = adapter
2727                                    .installation_test_binary(container_dir.to_path_buf())
2728                                    .await;
2729
2730                                this.update(&mut cx, |_, cx| {
2731                                    Self::check_errored_server(
2732                                        language,
2733                                        adapter,
2734                                        server_id,
2735                                        installation_test_binary,
2736                                        cx,
2737                                    )
2738                                });
2739                            }
2740                        }
2741
2742                        None
2743                    }
2744                }
2745            })
2746        });
2747
2748        self.language_servers.insert(server_id, state);
2749        self.language_server_ids.insert(key, server_id);
2750    }
2751
2752    fn reinstall_language_server(
2753        &mut self,
2754        language: Arc<Language>,
2755        adapter: Arc<CachedLspAdapter>,
2756        server_id: LanguageServerId,
2757        cx: &mut ModelContext<Self>,
2758    ) -> Option<Task<()>> {
2759        log::info!("beginning to reinstall server");
2760
2761        let existing_server = match self.language_servers.remove(&server_id) {
2762            Some(LanguageServerState::Running { server, .. }) => Some(server),
2763            _ => None,
2764        };
2765
2766        for worktree in &self.worktrees {
2767            if let Some(worktree) = worktree.upgrade(cx) {
2768                let key = (worktree.read(cx).id(), adapter.name.clone());
2769                self.language_server_ids.remove(&key);
2770            }
2771        }
2772
2773        Some(cx.spawn(move |this, mut cx| async move {
2774            if let Some(task) = existing_server.and_then(|server| server.shutdown()) {
2775                log::info!("shutting down existing server");
2776                task.await;
2777            }
2778
2779            // TODO: This is race-safe with regards to preventing new instances from
2780            // starting while deleting, but existing instances in other projects are going
2781            // to be very confused and messed up
2782            this.update(&mut cx, |this, cx| {
2783                this.languages.delete_server_container(adapter.clone(), cx)
2784            })
2785            .await;
2786
2787            this.update(&mut cx, |this, mut cx| {
2788                let worktrees = this.worktrees.clone();
2789                for worktree in worktrees {
2790                    let worktree = match worktree.upgrade(cx) {
2791                        Some(worktree) => worktree.read(cx),
2792                        None => continue,
2793                    };
2794                    let worktree_id = worktree.id();
2795                    let root_path = worktree.abs_path();
2796
2797                    this.start_language_server(
2798                        worktree_id,
2799                        root_path,
2800                        adapter.clone(),
2801                        language.clone(),
2802                        &mut cx,
2803                    );
2804                }
2805            })
2806        }))
2807    }
2808
2809    async fn setup_and_insert_language_server(
2810        this: WeakModelHandle<Self>,
2811        initialization_options: Option<serde_json::Value>,
2812        pending_server: PendingLanguageServer,
2813        adapter: Arc<CachedLspAdapter>,
2814        language: Arc<Language>,
2815        server_id: LanguageServerId,
2816        key: (WorktreeId, LanguageServerName),
2817        cx: &mut AsyncAppContext,
2818    ) -> Result<Option<Arc<LanguageServer>>> {
2819        let setup = Self::setup_pending_language_server(
2820            this,
2821            initialization_options,
2822            pending_server,
2823            adapter.clone(),
2824            server_id,
2825            cx,
2826        );
2827
2828        let language_server = match setup.await? {
2829            Some(language_server) => language_server,
2830            None => return Ok(None),
2831        };
2832        let this = match this.upgrade(cx) {
2833            Some(this) => this,
2834            None => return Err(anyhow!("failed to upgrade project handle")),
2835        };
2836
2837        this.update(cx, |this, cx| {
2838            this.insert_newly_running_language_server(
2839                language,
2840                adapter,
2841                language_server.clone(),
2842                server_id,
2843                key,
2844                cx,
2845            )
2846        })?;
2847
2848        Ok(Some(language_server))
2849    }
2850
2851    async fn setup_pending_language_server(
2852        this: WeakModelHandle<Self>,
2853        initialization_options: Option<serde_json::Value>,
2854        pending_server: PendingLanguageServer,
2855        adapter: Arc<CachedLspAdapter>,
2856        server_id: LanguageServerId,
2857        cx: &mut AsyncAppContext,
2858    ) -> Result<Option<Arc<LanguageServer>>> {
2859        let workspace_config = cx.update(|cx| adapter.workspace_configuration(cx)).await;
2860        let language_server = match pending_server.task.await? {
2861            Some(server) => server,
2862            None => return Ok(None),
2863        };
2864
2865        language_server
2866            .on_notification::<lsp::notification::PublishDiagnostics, _>({
2867                let adapter = adapter.clone();
2868                move |mut params, mut cx| {
2869                    let this = this;
2870                    let adapter = adapter.clone();
2871                    adapter.process_diagnostics(&mut params);
2872                    if let Some(this) = this.upgrade(&cx) {
2873                        this.update(&mut cx, |this, cx| {
2874                            this.update_diagnostics(
2875                                server_id,
2876                                params,
2877                                &adapter.disk_based_diagnostic_sources,
2878                                cx,
2879                            )
2880                            .log_err();
2881                        });
2882                    }
2883                }
2884            })
2885            .detach();
2886
2887        language_server
2888            .on_request::<lsp::request::WorkspaceConfiguration, _, _>({
2889                let adapter = adapter.clone();
2890                move |params, mut cx| {
2891                    let adapter = adapter.clone();
2892                    async move {
2893                        let workspace_config =
2894                            cx.update(|cx| adapter.workspace_configuration(cx)).await;
2895                        Ok(params
2896                            .items
2897                            .into_iter()
2898                            .map(|item| {
2899                                if let Some(section) = &item.section {
2900                                    workspace_config
2901                                        .get(section)
2902                                        .cloned()
2903                                        .unwrap_or(serde_json::Value::Null)
2904                                } else {
2905                                    workspace_config.clone()
2906                                }
2907                            })
2908                            .collect())
2909                    }
2910                }
2911            })
2912            .detach();
2913
2914        // Even though we don't have handling for these requests, respond to them to
2915        // avoid stalling any language server like `gopls` which waits for a response
2916        // to these requests when initializing.
2917        language_server
2918            .on_request::<lsp::request::WorkDoneProgressCreate, _, _>(
2919                move |params, mut cx| async move {
2920                    if let Some(this) = this.upgrade(&cx) {
2921                        this.update(&mut cx, |this, _| {
2922                            if let Some(status) = this.language_server_statuses.get_mut(&server_id)
2923                            {
2924                                if let lsp::NumberOrString::String(token) = params.token {
2925                                    status.progress_tokens.insert(token);
2926                                }
2927                            }
2928                        });
2929                    }
2930                    Ok(())
2931                },
2932            )
2933            .detach();
2934        language_server
2935            .on_request::<lsp::request::RegisterCapability, _, _>({
2936                move |params, mut cx| async move {
2937                    let this = this
2938                        .upgrade(&cx)
2939                        .ok_or_else(|| anyhow!("project dropped"))?;
2940                    for reg in params.registrations {
2941                        if reg.method == "workspace/didChangeWatchedFiles" {
2942                            if let Some(options) = reg.register_options {
2943                                let options = serde_json::from_value(options)?;
2944                                this.update(&mut cx, |this, cx| {
2945                                    this.on_lsp_did_change_watched_files(server_id, options, cx);
2946                                });
2947                            }
2948                        }
2949                    }
2950                    Ok(())
2951                }
2952            })
2953            .detach();
2954
2955        language_server
2956            .on_request::<lsp::request::ApplyWorkspaceEdit, _, _>({
2957                let adapter = adapter.clone();
2958                move |params, cx| {
2959                    Self::on_lsp_workspace_edit(this, params, server_id, adapter.clone(), cx)
2960                }
2961            })
2962            .detach();
2963
2964        language_server
2965            .on_request::<lsp::request::InlayHintRefreshRequest, _, _>({
2966                move |(), mut cx| async move {
2967                    let this = this
2968                        .upgrade(&cx)
2969                        .ok_or_else(|| anyhow!("project dropped"))?;
2970                    this.update(&mut cx, |project, cx| {
2971                        cx.emit(Event::RefreshInlayHints);
2972                        project.remote_id().map(|project_id| {
2973                            project.client.send(proto::RefreshInlayHints { project_id })
2974                        })
2975                    })
2976                    .transpose()?;
2977                    Ok(())
2978                }
2979            })
2980            .detach();
2981
2982        let disk_based_diagnostics_progress_token =
2983            adapter.disk_based_diagnostics_progress_token.clone();
2984
2985        language_server
2986            .on_notification::<lsp::notification::Progress, _>(move |params, mut cx| {
2987                if let Some(this) = this.upgrade(&cx) {
2988                    this.update(&mut cx, |this, cx| {
2989                        this.on_lsp_progress(
2990                            params,
2991                            server_id,
2992                            disk_based_diagnostics_progress_token.clone(),
2993                            cx,
2994                        );
2995                    });
2996                }
2997            })
2998            .detach();
2999
3000        let language_server = language_server.initialize(initialization_options).await?;
3001
3002        language_server
3003            .notify::<lsp::notification::DidChangeConfiguration>(
3004                lsp::DidChangeConfigurationParams {
3005                    settings: workspace_config,
3006                },
3007            )
3008            .ok();
3009
3010        Ok(Some(language_server))
3011    }
3012
3013    fn insert_newly_running_language_server(
3014        &mut self,
3015        language: Arc<Language>,
3016        adapter: Arc<CachedLspAdapter>,
3017        language_server: Arc<LanguageServer>,
3018        server_id: LanguageServerId,
3019        key: (WorktreeId, LanguageServerName),
3020        cx: &mut ModelContext<Self>,
3021    ) -> Result<()> {
3022        // If the language server for this key doesn't match the server id, don't store the
3023        // server. Which will cause it to be dropped, killing the process
3024        if self
3025            .language_server_ids
3026            .get(&key)
3027            .map(|id| id != &server_id)
3028            .unwrap_or(false)
3029        {
3030            return Ok(());
3031        }
3032
3033        // Update language_servers collection with Running variant of LanguageServerState
3034        // indicating that the server is up and running and ready
3035        self.language_servers.insert(
3036            server_id,
3037            LanguageServerState::Running {
3038                adapter: adapter.clone(),
3039                language: language.clone(),
3040                watched_paths: Default::default(),
3041                server: language_server.clone(),
3042                simulate_disk_based_diagnostics_completion: None,
3043            },
3044        );
3045
3046        self.language_server_statuses.insert(
3047            server_id,
3048            LanguageServerStatus {
3049                name: language_server.name().to_string(),
3050                pending_work: Default::default(),
3051                has_pending_diagnostic_updates: false,
3052                progress_tokens: Default::default(),
3053            },
3054        );
3055
3056        cx.emit(Event::LanguageServerAdded(server_id));
3057
3058        if let Some(project_id) = self.remote_id() {
3059            self.client.send(proto::StartLanguageServer {
3060                project_id,
3061                server: Some(proto::LanguageServer {
3062                    id: server_id.0 as u64,
3063                    name: language_server.name().to_string(),
3064                }),
3065            })?;
3066        }
3067
3068        // Tell the language server about every open buffer in the worktree that matches the language.
3069        for buffer in self.opened_buffers.values() {
3070            if let Some(buffer_handle) = buffer.upgrade(cx) {
3071                let buffer = buffer_handle.read(cx);
3072                let file = match File::from_dyn(buffer.file()) {
3073                    Some(file) => file,
3074                    None => continue,
3075                };
3076                let language = match buffer.language() {
3077                    Some(language) => language,
3078                    None => continue,
3079                };
3080
3081                if file.worktree.read(cx).id() != key.0
3082                    || !language.lsp_adapters().iter().any(|a| a.name == key.1)
3083                {
3084                    continue;
3085                }
3086
3087                let file = match file.as_local() {
3088                    Some(file) => file,
3089                    None => continue,
3090                };
3091
3092                let versions = self
3093                    .buffer_snapshots
3094                    .entry(buffer.remote_id())
3095                    .or_default()
3096                    .entry(server_id)
3097                    .or_insert_with(|| {
3098                        vec![LspBufferSnapshot {
3099                            version: 0,
3100                            snapshot: buffer.text_snapshot(),
3101                        }]
3102                    });
3103
3104                let snapshot = versions.last().unwrap();
3105                let version = snapshot.version;
3106                let initial_snapshot = &snapshot.snapshot;
3107                let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
3108                language_server.notify::<lsp::notification::DidOpenTextDocument>(
3109                    lsp::DidOpenTextDocumentParams {
3110                        text_document: lsp::TextDocumentItem::new(
3111                            uri,
3112                            adapter
3113                                .language_ids
3114                                .get(language.name().as_ref())
3115                                .cloned()
3116                                .unwrap_or_default(),
3117                            version,
3118                            initial_snapshot.text(),
3119                        ),
3120                    },
3121                )?;
3122
3123                buffer_handle.update(cx, |buffer, cx| {
3124                    buffer.set_completion_triggers(
3125                        language_server
3126                            .capabilities()
3127                            .completion_provider
3128                            .as_ref()
3129                            .and_then(|provider| provider.trigger_characters.clone())
3130                            .unwrap_or_default(),
3131                        cx,
3132                    )
3133                });
3134            }
3135        }
3136
3137        cx.notify();
3138        Ok(())
3139    }
3140
3141    // Returns a list of all of the worktrees which no longer have a language server and the root path
3142    // for the stopped server
3143    fn stop_language_server(
3144        &mut self,
3145        worktree_id: WorktreeId,
3146        adapter_name: LanguageServerName,
3147        cx: &mut ModelContext<Self>,
3148    ) -> Task<(Option<PathBuf>, Vec<WorktreeId>)> {
3149        let key = (worktree_id, adapter_name);
3150        if let Some(server_id) = self.language_server_ids.remove(&key) {
3151            log::info!("stopping language server {}", key.1 .0);
3152
3153            // Remove other entries for this language server as well
3154            let mut orphaned_worktrees = vec![worktree_id];
3155            let other_keys = self.language_server_ids.keys().cloned().collect::<Vec<_>>();
3156            for other_key in other_keys {
3157                if self.language_server_ids.get(&other_key) == Some(&server_id) {
3158                    self.language_server_ids.remove(&other_key);
3159                    orphaned_worktrees.push(other_key.0);
3160                }
3161            }
3162
3163            for buffer in self.opened_buffers.values() {
3164                if let Some(buffer) = buffer.upgrade(cx) {
3165                    buffer.update(cx, |buffer, cx| {
3166                        buffer.update_diagnostics(server_id, Default::default(), cx);
3167                    });
3168                }
3169            }
3170            for worktree in &self.worktrees {
3171                if let Some(worktree) = worktree.upgrade(cx) {
3172                    worktree.update(cx, |worktree, cx| {
3173                        if let Some(worktree) = worktree.as_local_mut() {
3174                            worktree.clear_diagnostics_for_language_server(server_id, cx);
3175                        }
3176                    });
3177                }
3178            }
3179
3180            self.language_server_statuses.remove(&server_id);
3181            cx.notify();
3182
3183            let server_state = self.language_servers.remove(&server_id);
3184            cx.emit(Event::LanguageServerRemoved(server_id));
3185            cx.spawn_weak(|this, mut cx| async move {
3186                let mut root_path = None;
3187
3188                let server = match server_state {
3189                    Some(LanguageServerState::Starting(task)) => task.await,
3190                    Some(LanguageServerState::Running { server, .. }) => Some(server),
3191                    None => None,
3192                };
3193
3194                if let Some(server) = server {
3195                    root_path = Some(server.root_path().clone());
3196                    if let Some(shutdown) = server.shutdown() {
3197                        shutdown.await;
3198                    }
3199                }
3200
3201                if let Some(this) = this.upgrade(&cx) {
3202                    this.update(&mut cx, |this, cx| {
3203                        this.language_server_statuses.remove(&server_id);
3204                        cx.notify();
3205                    });
3206                }
3207
3208                (root_path, orphaned_worktrees)
3209            })
3210        } else {
3211            Task::ready((None, Vec::new()))
3212        }
3213    }
3214
3215    pub fn restart_language_servers_for_buffers(
3216        &mut self,
3217        buffers: impl IntoIterator<Item = ModelHandle<Buffer>>,
3218        cx: &mut ModelContext<Self>,
3219    ) -> Option<()> {
3220        let language_server_lookup_info: HashSet<(ModelHandle<Worktree>, Arc<Language>)> = buffers
3221            .into_iter()
3222            .filter_map(|buffer| {
3223                let buffer = buffer.read(cx);
3224                let file = File::from_dyn(buffer.file())?;
3225                let full_path = file.full_path(cx);
3226                let language = self
3227                    .languages
3228                    .language_for_file(&full_path, Some(buffer.as_rope()))
3229                    .now_or_never()?
3230                    .ok()?;
3231                Some((file.worktree.clone(), language))
3232            })
3233            .collect();
3234        for (worktree, language) in language_server_lookup_info {
3235            self.restart_language_servers(worktree, language, cx);
3236        }
3237
3238        None
3239    }
3240
3241    // TODO This will break in the case where the adapter's root paths and worktrees are not equal
3242    fn restart_language_servers(
3243        &mut self,
3244        worktree: ModelHandle<Worktree>,
3245        language: Arc<Language>,
3246        cx: &mut ModelContext<Self>,
3247    ) {
3248        let worktree_id = worktree.read(cx).id();
3249        let fallback_path = worktree.read(cx).abs_path();
3250
3251        let mut stops = Vec::new();
3252        for adapter in language.lsp_adapters() {
3253            stops.push(self.stop_language_server(worktree_id, adapter.name.clone(), cx));
3254        }
3255
3256        if stops.is_empty() {
3257            return;
3258        }
3259        let mut stops = stops.into_iter();
3260
3261        cx.spawn_weak(|this, mut cx| async move {
3262            let (original_root_path, mut orphaned_worktrees) = stops.next().unwrap().await;
3263            for stop in stops {
3264                let (_, worktrees) = stop.await;
3265                orphaned_worktrees.extend_from_slice(&worktrees);
3266            }
3267
3268            let this = match this.upgrade(&cx) {
3269                Some(this) => this,
3270                None => return,
3271            };
3272
3273            this.update(&mut cx, |this, cx| {
3274                // Attempt to restart using original server path. Fallback to passed in
3275                // path if we could not retrieve the root path
3276                let root_path = original_root_path
3277                    .map(|path_buf| Arc::from(path_buf.as_path()))
3278                    .unwrap_or(fallback_path);
3279
3280                this.start_language_servers(&worktree, root_path, language.clone(), cx);
3281
3282                // Lookup new server ids and set them for each of the orphaned worktrees
3283                for adapter in language.lsp_adapters() {
3284                    if let Some(new_server_id) = this
3285                        .language_server_ids
3286                        .get(&(worktree_id, adapter.name.clone()))
3287                        .cloned()
3288                    {
3289                        for &orphaned_worktree in &orphaned_worktrees {
3290                            this.language_server_ids
3291                                .insert((orphaned_worktree, adapter.name.clone()), new_server_id);
3292                        }
3293                    }
3294                }
3295            });
3296        })
3297        .detach();
3298    }
3299
3300    fn check_errored_server(
3301        language: Arc<Language>,
3302        adapter: Arc<CachedLspAdapter>,
3303        server_id: LanguageServerId,
3304        installation_test_binary: Option<LanguageServerBinary>,
3305        cx: &mut ModelContext<Self>,
3306    ) {
3307        if !adapter.can_be_reinstalled() {
3308            log::info!(
3309                "Validation check requested for {:?} but it cannot be reinstalled",
3310                adapter.name.0
3311            );
3312            return;
3313        }
3314
3315        cx.spawn(|this, mut cx| async move {
3316            log::info!("About to spawn test binary");
3317
3318            // A lack of test binary counts as a failure
3319            let process = installation_test_binary.and_then(|binary| {
3320                smol::process::Command::new(&binary.path)
3321                    .current_dir(&binary.path)
3322                    .args(binary.arguments)
3323                    .stdin(Stdio::piped())
3324                    .stdout(Stdio::piped())
3325                    .stderr(Stdio::inherit())
3326                    .kill_on_drop(true)
3327                    .spawn()
3328                    .ok()
3329            });
3330
3331            const PROCESS_TIMEOUT: Duration = Duration::from_secs(5);
3332            let mut timeout = cx.background().timer(PROCESS_TIMEOUT).fuse();
3333
3334            let mut errored = false;
3335            if let Some(mut process) = process {
3336                futures::select! {
3337                    status = process.status().fuse() => match status {
3338                        Ok(status) => errored = !status.success(),
3339                        Err(_) => errored = true,
3340                    },
3341
3342                    _ = timeout => {
3343                        log::info!("test binary time-ed out, this counts as a success");
3344                        _ = process.kill();
3345                    }
3346                }
3347            } else {
3348                log::warn!("test binary failed to launch");
3349                errored = true;
3350            }
3351
3352            if errored {
3353                log::warn!("test binary check failed");
3354                let task = this.update(&mut cx, move |this, mut cx| {
3355                    this.reinstall_language_server(language, adapter, server_id, &mut cx)
3356                });
3357
3358                if let Some(task) = task {
3359                    task.await;
3360                }
3361            }
3362        })
3363        .detach();
3364    }
3365
3366    fn on_lsp_progress(
3367        &mut self,
3368        progress: lsp::ProgressParams,
3369        language_server_id: LanguageServerId,
3370        disk_based_diagnostics_progress_token: Option<String>,
3371        cx: &mut ModelContext<Self>,
3372    ) {
3373        let token = match progress.token {
3374            lsp::NumberOrString::String(token) => token,
3375            lsp::NumberOrString::Number(token) => {
3376                log::info!("skipping numeric progress token {}", token);
3377                return;
3378            }
3379        };
3380        let lsp::ProgressParamsValue::WorkDone(progress) = progress.value;
3381        let language_server_status =
3382            if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3383                status
3384            } else {
3385                return;
3386            };
3387
3388        if !language_server_status.progress_tokens.contains(&token) {
3389            return;
3390        }
3391
3392        let is_disk_based_diagnostics_progress = disk_based_diagnostics_progress_token
3393            .as_ref()
3394            .map_or(false, |disk_based_token| {
3395                token.starts_with(disk_based_token)
3396            });
3397
3398        match progress {
3399            lsp::WorkDoneProgress::Begin(report) => {
3400                if is_disk_based_diagnostics_progress {
3401                    language_server_status.has_pending_diagnostic_updates = true;
3402                    self.disk_based_diagnostics_started(language_server_id, cx);
3403                    self.buffer_ordered_messages_tx
3404                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3405                            language_server_id,
3406                            message: proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(Default::default())
3407                        })
3408                        .ok();
3409                } else {
3410                    self.on_lsp_work_start(
3411                        language_server_id,
3412                        token.clone(),
3413                        LanguageServerProgress {
3414                            message: report.message.clone(),
3415                            percentage: report.percentage.map(|p| p as usize),
3416                            last_update_at: Instant::now(),
3417                        },
3418                        cx,
3419                    );
3420                    self.buffer_ordered_messages_tx
3421                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3422                            language_server_id,
3423                            message: proto::update_language_server::Variant::WorkStart(
3424                                proto::LspWorkStart {
3425                                    token,
3426                                    message: report.message,
3427                                    percentage: report.percentage.map(|p| p as u32),
3428                                },
3429                            ),
3430                        })
3431                        .ok();
3432                }
3433            }
3434            lsp::WorkDoneProgress::Report(report) => {
3435                if !is_disk_based_diagnostics_progress {
3436                    self.on_lsp_work_progress(
3437                        language_server_id,
3438                        token.clone(),
3439                        LanguageServerProgress {
3440                            message: report.message.clone(),
3441                            percentage: report.percentage.map(|p| p as usize),
3442                            last_update_at: Instant::now(),
3443                        },
3444                        cx,
3445                    );
3446                    self.buffer_ordered_messages_tx
3447                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3448                            language_server_id,
3449                            message: proto::update_language_server::Variant::WorkProgress(
3450                                proto::LspWorkProgress {
3451                                    token,
3452                                    message: report.message,
3453                                    percentage: report.percentage.map(|p| p as u32),
3454                                },
3455                            ),
3456                        })
3457                        .ok();
3458                }
3459            }
3460            lsp::WorkDoneProgress::End(_) => {
3461                language_server_status.progress_tokens.remove(&token);
3462
3463                if is_disk_based_diagnostics_progress {
3464                    language_server_status.has_pending_diagnostic_updates = false;
3465                    self.disk_based_diagnostics_finished(language_server_id, cx);
3466                    self.buffer_ordered_messages_tx
3467                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3468                            language_server_id,
3469                            message:
3470                                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
3471                                    Default::default(),
3472                                ),
3473                        })
3474                        .ok();
3475                } else {
3476                    self.on_lsp_work_end(language_server_id, token.clone(), cx);
3477                    self.buffer_ordered_messages_tx
3478                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3479                            language_server_id,
3480                            message: proto::update_language_server::Variant::WorkEnd(
3481                                proto::LspWorkEnd { token },
3482                            ),
3483                        })
3484                        .ok();
3485                }
3486            }
3487        }
3488    }
3489
3490    fn on_lsp_work_start(
3491        &mut self,
3492        language_server_id: LanguageServerId,
3493        token: String,
3494        progress: LanguageServerProgress,
3495        cx: &mut ModelContext<Self>,
3496    ) {
3497        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3498            status.pending_work.insert(token, progress);
3499            cx.notify();
3500        }
3501    }
3502
3503    fn on_lsp_work_progress(
3504        &mut self,
3505        language_server_id: LanguageServerId,
3506        token: String,
3507        progress: LanguageServerProgress,
3508        cx: &mut ModelContext<Self>,
3509    ) {
3510        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3511            let entry = status
3512                .pending_work
3513                .entry(token)
3514                .or_insert(LanguageServerProgress {
3515                    message: Default::default(),
3516                    percentage: Default::default(),
3517                    last_update_at: progress.last_update_at,
3518                });
3519            if progress.message.is_some() {
3520                entry.message = progress.message;
3521            }
3522            if progress.percentage.is_some() {
3523                entry.percentage = progress.percentage;
3524            }
3525            entry.last_update_at = progress.last_update_at;
3526            cx.notify();
3527        }
3528    }
3529
3530    fn on_lsp_work_end(
3531        &mut self,
3532        language_server_id: LanguageServerId,
3533        token: String,
3534        cx: &mut ModelContext<Self>,
3535    ) {
3536        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3537            cx.emit(Event::RefreshInlayHints);
3538            status.pending_work.remove(&token);
3539            cx.notify();
3540        }
3541    }
3542
3543    fn on_lsp_did_change_watched_files(
3544        &mut self,
3545        language_server_id: LanguageServerId,
3546        params: DidChangeWatchedFilesRegistrationOptions,
3547        cx: &mut ModelContext<Self>,
3548    ) {
3549        if let Some(LanguageServerState::Running { watched_paths, .. }) =
3550            self.language_servers.get_mut(&language_server_id)
3551        {
3552            let mut builders = HashMap::default();
3553            for watcher in params.watchers {
3554                for worktree in &self.worktrees {
3555                    if let Some(worktree) = worktree.upgrade(cx) {
3556                        let glob_is_inside_worktree = worktree.update(cx, |tree, _| {
3557                            if let Some(abs_path) = tree.abs_path().to_str() {
3558                                let relative_glob_pattern = match &watcher.glob_pattern {
3559                                    lsp::GlobPattern::String(s) => s
3560                                        .strip_prefix(abs_path)
3561                                        .and_then(|s| s.strip_prefix(std::path::MAIN_SEPARATOR)),
3562                                    lsp::GlobPattern::Relative(rp) => {
3563                                        let base_uri = match &rp.base_uri {
3564                                            lsp::OneOf::Left(workspace_folder) => {
3565                                                &workspace_folder.uri
3566                                            }
3567                                            lsp::OneOf::Right(base_uri) => base_uri,
3568                                        };
3569                                        base_uri.to_file_path().ok().and_then(|file_path| {
3570                                            (file_path.to_str() == Some(abs_path))
3571                                                .then_some(rp.pattern.as_str())
3572                                        })
3573                                    }
3574                                };
3575                                if let Some(relative_glob_pattern) = relative_glob_pattern {
3576                                    let literal_prefix =
3577                                        glob_literal_prefix(&relative_glob_pattern);
3578                                    tree.as_local_mut()
3579                                        .unwrap()
3580                                        .add_path_prefix_to_scan(Path::new(literal_prefix).into());
3581                                    if let Some(glob) = Glob::new(relative_glob_pattern).log_err() {
3582                                        builders
3583                                            .entry(tree.id())
3584                                            .or_insert_with(|| GlobSetBuilder::new())
3585                                            .add(glob);
3586                                    }
3587                                    return true;
3588                                }
3589                            }
3590                            false
3591                        });
3592                        if glob_is_inside_worktree {
3593                            break;
3594                        }
3595                    }
3596                }
3597            }
3598
3599            watched_paths.clear();
3600            for (worktree_id, builder) in builders {
3601                if let Ok(globset) = builder.build() {
3602                    watched_paths.insert(worktree_id, globset);
3603                }
3604            }
3605
3606            cx.notify();
3607        }
3608    }
3609
3610    async fn on_lsp_workspace_edit(
3611        this: WeakModelHandle<Self>,
3612        params: lsp::ApplyWorkspaceEditParams,
3613        server_id: LanguageServerId,
3614        adapter: Arc<CachedLspAdapter>,
3615        mut cx: AsyncAppContext,
3616    ) -> Result<lsp::ApplyWorkspaceEditResponse> {
3617        let this = this
3618            .upgrade(&cx)
3619            .ok_or_else(|| anyhow!("project project closed"))?;
3620        let language_server = this
3621            .read_with(&cx, |this, _| this.language_server_for_id(server_id))
3622            .ok_or_else(|| anyhow!("language server not found"))?;
3623        let transaction = Self::deserialize_workspace_edit(
3624            this.clone(),
3625            params.edit,
3626            true,
3627            adapter.clone(),
3628            language_server.clone(),
3629            &mut cx,
3630        )
3631        .await
3632        .log_err();
3633        this.update(&mut cx, |this, _| {
3634            if let Some(transaction) = transaction {
3635                this.last_workspace_edits_by_language_server
3636                    .insert(server_id, transaction);
3637            }
3638        });
3639        Ok(lsp::ApplyWorkspaceEditResponse {
3640            applied: true,
3641            failed_change: None,
3642            failure_reason: None,
3643        })
3644    }
3645
3646    pub fn language_server_statuses(
3647        &self,
3648    ) -> impl DoubleEndedIterator<Item = &LanguageServerStatus> {
3649        self.language_server_statuses.values()
3650    }
3651
3652    pub fn update_diagnostics(
3653        &mut self,
3654        language_server_id: LanguageServerId,
3655        mut params: lsp::PublishDiagnosticsParams,
3656        disk_based_sources: &[String],
3657        cx: &mut ModelContext<Self>,
3658    ) -> Result<()> {
3659        let abs_path = params
3660            .uri
3661            .to_file_path()
3662            .map_err(|_| anyhow!("URI is not a file"))?;
3663        let mut diagnostics = Vec::default();
3664        let mut primary_diagnostic_group_ids = HashMap::default();
3665        let mut sources_by_group_id = HashMap::default();
3666        let mut supporting_diagnostics = HashMap::default();
3667
3668        // Ensure that primary diagnostics are always the most severe
3669        params.diagnostics.sort_by_key(|item| item.severity);
3670
3671        for diagnostic in &params.diagnostics {
3672            let source = diagnostic.source.as_ref();
3673            let code = diagnostic.code.as_ref().map(|code| match code {
3674                lsp::NumberOrString::Number(code) => code.to_string(),
3675                lsp::NumberOrString::String(code) => code.clone(),
3676            });
3677            let range = range_from_lsp(diagnostic.range);
3678            let is_supporting = diagnostic
3679                .related_information
3680                .as_ref()
3681                .map_or(false, |infos| {
3682                    infos.iter().any(|info| {
3683                        primary_diagnostic_group_ids.contains_key(&(
3684                            source,
3685                            code.clone(),
3686                            range_from_lsp(info.location.range),
3687                        ))
3688                    })
3689                });
3690
3691            let is_unnecessary = diagnostic.tags.as_ref().map_or(false, |tags| {
3692                tags.iter().any(|tag| *tag == DiagnosticTag::UNNECESSARY)
3693            });
3694
3695            if is_supporting {
3696                supporting_diagnostics.insert(
3697                    (source, code.clone(), range),
3698                    (diagnostic.severity, is_unnecessary),
3699                );
3700            } else {
3701                let group_id = post_inc(&mut self.next_diagnostic_group_id);
3702                let is_disk_based =
3703                    source.map_or(false, |source| disk_based_sources.contains(source));
3704
3705                sources_by_group_id.insert(group_id, source);
3706                primary_diagnostic_group_ids
3707                    .insert((source, code.clone(), range.clone()), group_id);
3708
3709                diagnostics.push(DiagnosticEntry {
3710                    range,
3711                    diagnostic: Diagnostic {
3712                        source: diagnostic.source.clone(),
3713                        code: code.clone(),
3714                        severity: diagnostic.severity.unwrap_or(DiagnosticSeverity::ERROR),
3715                        message: diagnostic.message.clone(),
3716                        group_id,
3717                        is_primary: true,
3718                        is_valid: true,
3719                        is_disk_based,
3720                        is_unnecessary,
3721                    },
3722                });
3723                if let Some(infos) = &diagnostic.related_information {
3724                    for info in infos {
3725                        if info.location.uri == params.uri && !info.message.is_empty() {
3726                            let range = range_from_lsp(info.location.range);
3727                            diagnostics.push(DiagnosticEntry {
3728                                range,
3729                                diagnostic: Diagnostic {
3730                                    source: diagnostic.source.clone(),
3731                                    code: code.clone(),
3732                                    severity: DiagnosticSeverity::INFORMATION,
3733                                    message: info.message.clone(),
3734                                    group_id,
3735                                    is_primary: false,
3736                                    is_valid: true,
3737                                    is_disk_based,
3738                                    is_unnecessary: false,
3739                                },
3740                            });
3741                        }
3742                    }
3743                }
3744            }
3745        }
3746
3747        for entry in &mut diagnostics {
3748            let diagnostic = &mut entry.diagnostic;
3749            if !diagnostic.is_primary {
3750                let source = *sources_by_group_id.get(&diagnostic.group_id).unwrap();
3751                if let Some(&(severity, is_unnecessary)) = supporting_diagnostics.get(&(
3752                    source,
3753                    diagnostic.code.clone(),
3754                    entry.range.clone(),
3755                )) {
3756                    if let Some(severity) = severity {
3757                        diagnostic.severity = severity;
3758                    }
3759                    diagnostic.is_unnecessary = is_unnecessary;
3760                }
3761            }
3762        }
3763
3764        self.update_diagnostic_entries(
3765            language_server_id,
3766            abs_path,
3767            params.version,
3768            diagnostics,
3769            cx,
3770        )?;
3771        Ok(())
3772    }
3773
3774    pub fn update_diagnostic_entries(
3775        &mut self,
3776        server_id: LanguageServerId,
3777        abs_path: PathBuf,
3778        version: Option<i32>,
3779        diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3780        cx: &mut ModelContext<Project>,
3781    ) -> Result<(), anyhow::Error> {
3782        let (worktree, relative_path) = self
3783            .find_local_worktree(&abs_path, cx)
3784            .ok_or_else(|| anyhow!("no worktree found for diagnostics path {abs_path:?}"))?;
3785
3786        let project_path = ProjectPath {
3787            worktree_id: worktree.read(cx).id(),
3788            path: relative_path.into(),
3789        };
3790
3791        if let Some(buffer) = self.get_open_buffer(&project_path, cx) {
3792            self.update_buffer_diagnostics(&buffer, server_id, version, diagnostics.clone(), cx)?;
3793        }
3794
3795        let updated = worktree.update(cx, |worktree, cx| {
3796            worktree
3797                .as_local_mut()
3798                .ok_or_else(|| anyhow!("not a local worktree"))?
3799                .update_diagnostics(server_id, project_path.path.clone(), diagnostics, cx)
3800        })?;
3801        if updated {
3802            cx.emit(Event::DiagnosticsUpdated {
3803                language_server_id: server_id,
3804                path: project_path,
3805            });
3806        }
3807        Ok(())
3808    }
3809
3810    fn update_buffer_diagnostics(
3811        &mut self,
3812        buffer: &ModelHandle<Buffer>,
3813        server_id: LanguageServerId,
3814        version: Option<i32>,
3815        mut diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3816        cx: &mut ModelContext<Self>,
3817    ) -> Result<()> {
3818        fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
3819            Ordering::Equal
3820                .then_with(|| b.is_primary.cmp(&a.is_primary))
3821                .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
3822                .then_with(|| a.severity.cmp(&b.severity))
3823                .then_with(|| a.message.cmp(&b.message))
3824        }
3825
3826        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx)?;
3827
3828        diagnostics.sort_unstable_by(|a, b| {
3829            Ordering::Equal
3830                .then_with(|| a.range.start.cmp(&b.range.start))
3831                .then_with(|| b.range.end.cmp(&a.range.end))
3832                .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
3833        });
3834
3835        let mut sanitized_diagnostics = Vec::new();
3836        let edits_since_save = Patch::new(
3837            snapshot
3838                .edits_since::<Unclipped<PointUtf16>>(buffer.read(cx).saved_version())
3839                .collect(),
3840        );
3841        for entry in diagnostics {
3842            let start;
3843            let end;
3844            if entry.diagnostic.is_disk_based {
3845                // Some diagnostics are based on files on disk instead of buffers'
3846                // current contents. Adjust these diagnostics' ranges to reflect
3847                // any unsaved edits.
3848                start = edits_since_save.old_to_new(entry.range.start);
3849                end = edits_since_save.old_to_new(entry.range.end);
3850            } else {
3851                start = entry.range.start;
3852                end = entry.range.end;
3853            }
3854
3855            let mut range = snapshot.clip_point_utf16(start, Bias::Left)
3856                ..snapshot.clip_point_utf16(end, Bias::Right);
3857
3858            // Expand empty ranges by one codepoint
3859            if range.start == range.end {
3860                // This will be go to the next boundary when being clipped
3861                range.end.column += 1;
3862                range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Right);
3863                if range.start == range.end && range.end.column > 0 {
3864                    range.start.column -= 1;
3865                    range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Left);
3866                }
3867            }
3868
3869            sanitized_diagnostics.push(DiagnosticEntry {
3870                range,
3871                diagnostic: entry.diagnostic,
3872            });
3873        }
3874        drop(edits_since_save);
3875
3876        let set = DiagnosticSet::new(sanitized_diagnostics, &snapshot);
3877        buffer.update(cx, |buffer, cx| {
3878            buffer.update_diagnostics(server_id, set, cx)
3879        });
3880        Ok(())
3881    }
3882
3883    pub fn reload_buffers(
3884        &self,
3885        buffers: HashSet<ModelHandle<Buffer>>,
3886        push_to_history: bool,
3887        cx: &mut ModelContext<Self>,
3888    ) -> Task<Result<ProjectTransaction>> {
3889        let mut local_buffers = Vec::new();
3890        let mut remote_buffers = None;
3891        for buffer_handle in buffers {
3892            let buffer = buffer_handle.read(cx);
3893            if buffer.is_dirty() {
3894                if let Some(file) = File::from_dyn(buffer.file()) {
3895                    if file.is_local() {
3896                        local_buffers.push(buffer_handle);
3897                    } else {
3898                        remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
3899                    }
3900                }
3901            }
3902        }
3903
3904        let remote_buffers = self.remote_id().zip(remote_buffers);
3905        let client = self.client.clone();
3906
3907        cx.spawn(|this, mut cx| async move {
3908            let mut project_transaction = ProjectTransaction::default();
3909
3910            if let Some((project_id, remote_buffers)) = remote_buffers {
3911                let response = client
3912                    .request(proto::ReloadBuffers {
3913                        project_id,
3914                        buffer_ids: remote_buffers
3915                            .iter()
3916                            .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
3917                            .collect(),
3918                    })
3919                    .await?
3920                    .transaction
3921                    .ok_or_else(|| anyhow!("missing transaction"))?;
3922                project_transaction = this
3923                    .update(&mut cx, |this, cx| {
3924                        this.deserialize_project_transaction(response, push_to_history, cx)
3925                    })
3926                    .await?;
3927            }
3928
3929            for buffer in local_buffers {
3930                let transaction = buffer
3931                    .update(&mut cx, |buffer, cx| buffer.reload(cx))
3932                    .await?;
3933                buffer.update(&mut cx, |buffer, cx| {
3934                    if let Some(transaction) = transaction {
3935                        if !push_to_history {
3936                            buffer.forget_transaction(transaction.id);
3937                        }
3938                        project_transaction.0.insert(cx.handle(), transaction);
3939                    }
3940                });
3941            }
3942
3943            Ok(project_transaction)
3944        })
3945    }
3946
3947    pub fn format(
3948        &self,
3949        buffers: HashSet<ModelHandle<Buffer>>,
3950        push_to_history: bool,
3951        trigger: FormatTrigger,
3952        cx: &mut ModelContext<Project>,
3953    ) -> Task<Result<ProjectTransaction>> {
3954        if self.is_local() {
3955            let mut buffers_with_paths_and_servers = buffers
3956                .into_iter()
3957                .filter_map(|buffer_handle| {
3958                    let buffer = buffer_handle.read(cx);
3959                    let file = File::from_dyn(buffer.file())?;
3960                    let buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
3961                    let server = self
3962                        .primary_language_server_for_buffer(buffer, cx)
3963                        .map(|s| s.1.clone());
3964                    Some((buffer_handle, buffer_abs_path, server))
3965                })
3966                .collect::<Vec<_>>();
3967
3968            cx.spawn(|this, mut cx| async move {
3969                // Do not allow multiple concurrent formatting requests for the
3970                // same buffer.
3971                this.update(&mut cx, |this, cx| {
3972                    buffers_with_paths_and_servers.retain(|(buffer, _, _)| {
3973                        this.buffers_being_formatted
3974                            .insert(buffer.read(cx).remote_id())
3975                    });
3976                });
3977
3978                let _cleanup = defer({
3979                    let this = this.clone();
3980                    let mut cx = cx.clone();
3981                    let buffers = &buffers_with_paths_and_servers;
3982                    move || {
3983                        this.update(&mut cx, |this, cx| {
3984                            for (buffer, _, _) in buffers {
3985                                this.buffers_being_formatted
3986                                    .remove(&buffer.read(cx).remote_id());
3987                            }
3988                        });
3989                    }
3990                });
3991
3992                let mut project_transaction = ProjectTransaction::default();
3993                for (buffer, buffer_abs_path, language_server) in &buffers_with_paths_and_servers {
3994                    let settings = buffer.read_with(&cx, |buffer, cx| {
3995                        language_settings(buffer.language(), buffer.file(), cx).clone()
3996                    });
3997
3998                    let remove_trailing_whitespace = settings.remove_trailing_whitespace_on_save;
3999                    let ensure_final_newline = settings.ensure_final_newline_on_save;
4000                    let format_on_save = settings.format_on_save.clone();
4001                    let formatter = settings.formatter.clone();
4002                    let tab_size = settings.tab_size;
4003
4004                    // First, format buffer's whitespace according to the settings.
4005                    let trailing_whitespace_diff = if remove_trailing_whitespace {
4006                        Some(
4007                            buffer
4008                                .read_with(&cx, |b, cx| b.remove_trailing_whitespace(cx))
4009                                .await,
4010                        )
4011                    } else {
4012                        None
4013                    };
4014                    let whitespace_transaction_id = buffer.update(&mut cx, |buffer, cx| {
4015                        buffer.finalize_last_transaction();
4016                        buffer.start_transaction();
4017                        if let Some(diff) = trailing_whitespace_diff {
4018                            buffer.apply_diff(diff, cx);
4019                        }
4020                        if ensure_final_newline {
4021                            buffer.ensure_final_newline(cx);
4022                        }
4023                        buffer.end_transaction(cx)
4024                    });
4025
4026                    // Currently, formatting operations are represented differently depending on
4027                    // whether they come from a language server or an external command.
4028                    enum FormatOperation {
4029                        Lsp(Vec<(Range<Anchor>, String)>),
4030                        External(Diff),
4031                    }
4032
4033                    // Apply language-specific formatting using either a language server
4034                    // or external command.
4035                    let mut format_operation = None;
4036                    match (formatter, format_on_save) {
4037                        (_, FormatOnSave::Off) if trigger == FormatTrigger::Save => {}
4038
4039                        (Formatter::LanguageServer, FormatOnSave::On | FormatOnSave::Off)
4040                        | (_, FormatOnSave::LanguageServer) => {
4041                            if let Some((language_server, buffer_abs_path)) =
4042                                language_server.as_ref().zip(buffer_abs_path.as_ref())
4043                            {
4044                                format_operation = Some(FormatOperation::Lsp(
4045                                    Self::format_via_lsp(
4046                                        &this,
4047                                        &buffer,
4048                                        buffer_abs_path,
4049                                        &language_server,
4050                                        tab_size,
4051                                        &mut cx,
4052                                    )
4053                                    .await
4054                                    .context("failed to format via language server")?,
4055                                ));
4056                            }
4057                        }
4058
4059                        (
4060                            Formatter::External { command, arguments },
4061                            FormatOnSave::On | FormatOnSave::Off,
4062                        )
4063                        | (_, FormatOnSave::External { command, arguments }) => {
4064                            if let Some(buffer_abs_path) = buffer_abs_path {
4065                                format_operation = Self::format_via_external_command(
4066                                    &buffer,
4067                                    &buffer_abs_path,
4068                                    &command,
4069                                    &arguments,
4070                                    &mut cx,
4071                                )
4072                                .await
4073                                .context(format!(
4074                                    "failed to format via external command {:?}",
4075                                    command
4076                                ))?
4077                                .map(FormatOperation::External);
4078                            }
4079                        }
4080                    };
4081
4082                    buffer.update(&mut cx, |b, cx| {
4083                        // If the buffer had its whitespace formatted and was edited while the language-specific
4084                        // formatting was being computed, avoid applying the language-specific formatting, because
4085                        // it can't be grouped with the whitespace formatting in the undo history.
4086                        if let Some(transaction_id) = whitespace_transaction_id {
4087                            if b.peek_undo_stack()
4088                                .map_or(true, |e| e.transaction_id() != transaction_id)
4089                            {
4090                                format_operation.take();
4091                            }
4092                        }
4093
4094                        // Apply any language-specific formatting, and group the two formatting operations
4095                        // in the buffer's undo history.
4096                        if let Some(operation) = format_operation {
4097                            match operation {
4098                                FormatOperation::Lsp(edits) => {
4099                                    b.edit(edits, None, cx);
4100                                }
4101                                FormatOperation::External(diff) => {
4102                                    b.apply_diff(diff, cx);
4103                                }
4104                            }
4105
4106                            if let Some(transaction_id) = whitespace_transaction_id {
4107                                b.group_until_transaction(transaction_id);
4108                            }
4109                        }
4110
4111                        if let Some(transaction) = b.finalize_last_transaction().cloned() {
4112                            if !push_to_history {
4113                                b.forget_transaction(transaction.id);
4114                            }
4115                            project_transaction.0.insert(buffer.clone(), transaction);
4116                        }
4117                    });
4118                }
4119
4120                Ok(project_transaction)
4121            })
4122        } else {
4123            let remote_id = self.remote_id();
4124            let client = self.client.clone();
4125            cx.spawn(|this, mut cx| async move {
4126                let mut project_transaction = ProjectTransaction::default();
4127                if let Some(project_id) = remote_id {
4128                    let response = client
4129                        .request(proto::FormatBuffers {
4130                            project_id,
4131                            trigger: trigger as i32,
4132                            buffer_ids: buffers
4133                                .iter()
4134                                .map(|buffer| buffer.read_with(&cx, |buffer, _| buffer.remote_id()))
4135                                .collect(),
4136                        })
4137                        .await?
4138                        .transaction
4139                        .ok_or_else(|| anyhow!("missing transaction"))?;
4140                    project_transaction = this
4141                        .update(&mut cx, |this, cx| {
4142                            this.deserialize_project_transaction(response, push_to_history, cx)
4143                        })
4144                        .await?;
4145                }
4146                Ok(project_transaction)
4147            })
4148        }
4149    }
4150
4151    async fn format_via_lsp(
4152        this: &ModelHandle<Self>,
4153        buffer: &ModelHandle<Buffer>,
4154        abs_path: &Path,
4155        language_server: &Arc<LanguageServer>,
4156        tab_size: NonZeroU32,
4157        cx: &mut AsyncAppContext,
4158    ) -> Result<Vec<(Range<Anchor>, String)>> {
4159        let uri = lsp::Url::from_file_path(abs_path)
4160            .map_err(|_| anyhow!("failed to convert abs path to uri"))?;
4161        let text_document = lsp::TextDocumentIdentifier::new(uri);
4162        let capabilities = &language_server.capabilities();
4163
4164        let formatting_provider = capabilities.document_formatting_provider.as_ref();
4165        let range_formatting_provider = capabilities.document_range_formatting_provider.as_ref();
4166
4167        let lsp_edits = if matches!(formatting_provider, Some(p) if *p != OneOf::Left(false)) {
4168            language_server
4169                .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
4170                    text_document,
4171                    options: lsp_command::lsp_formatting_options(tab_size.get()),
4172                    work_done_progress_params: Default::default(),
4173                })
4174                .await?
4175        } else if matches!(range_formatting_provider, Some(p) if *p != OneOf::Left(false)) {
4176            let buffer_start = lsp::Position::new(0, 0);
4177            let buffer_end = buffer.read_with(cx, |b, _| point_to_lsp(b.max_point_utf16()));
4178
4179            language_server
4180                .request::<lsp::request::RangeFormatting>(lsp::DocumentRangeFormattingParams {
4181                    text_document,
4182                    range: lsp::Range::new(buffer_start, buffer_end),
4183                    options: lsp_command::lsp_formatting_options(tab_size.get()),
4184                    work_done_progress_params: Default::default(),
4185                })
4186                .await?
4187        } else {
4188            None
4189        };
4190
4191        if let Some(lsp_edits) = lsp_edits {
4192            this.update(cx, |this, cx| {
4193                this.edits_from_lsp(buffer, lsp_edits, language_server.server_id(), None, cx)
4194            })
4195            .await
4196        } else {
4197            Ok(Vec::new())
4198        }
4199    }
4200
4201    async fn format_via_external_command(
4202        buffer: &ModelHandle<Buffer>,
4203        buffer_abs_path: &Path,
4204        command: &str,
4205        arguments: &[String],
4206        cx: &mut AsyncAppContext,
4207    ) -> Result<Option<Diff>> {
4208        let working_dir_path = buffer.read_with(cx, |buffer, cx| {
4209            let file = File::from_dyn(buffer.file())?;
4210            let worktree = file.worktree.read(cx).as_local()?;
4211            let mut worktree_path = worktree.abs_path().to_path_buf();
4212            if worktree.root_entry()?.is_file() {
4213                worktree_path.pop();
4214            }
4215            Some(worktree_path)
4216        });
4217
4218        if let Some(working_dir_path) = working_dir_path {
4219            let mut child =
4220                smol::process::Command::new(command)
4221                    .args(arguments.iter().map(|arg| {
4222                        arg.replace("{buffer_path}", &buffer_abs_path.to_string_lossy())
4223                    }))
4224                    .current_dir(&working_dir_path)
4225                    .stdin(smol::process::Stdio::piped())
4226                    .stdout(smol::process::Stdio::piped())
4227                    .stderr(smol::process::Stdio::piped())
4228                    .spawn()?;
4229            let stdin = child
4230                .stdin
4231                .as_mut()
4232                .ok_or_else(|| anyhow!("failed to acquire stdin"))?;
4233            let text = buffer.read_with(cx, |buffer, _| buffer.as_rope().clone());
4234            for chunk in text.chunks() {
4235                stdin.write_all(chunk.as_bytes()).await?;
4236            }
4237            stdin.flush().await?;
4238
4239            let output = child.output().await?;
4240            if !output.status.success() {
4241                return Err(anyhow!(
4242                    "command failed with exit code {:?}:\nstdout: {}\nstderr: {}",
4243                    output.status.code(),
4244                    String::from_utf8_lossy(&output.stdout),
4245                    String::from_utf8_lossy(&output.stderr),
4246                ));
4247            }
4248
4249            let stdout = String::from_utf8(output.stdout)?;
4250            Ok(Some(
4251                buffer
4252                    .read_with(cx, |buffer, cx| buffer.diff(stdout, cx))
4253                    .await,
4254            ))
4255        } else {
4256            Ok(None)
4257        }
4258    }
4259
4260    pub fn definition<T: ToPointUtf16>(
4261        &self,
4262        buffer: &ModelHandle<Buffer>,
4263        position: T,
4264        cx: &mut ModelContext<Self>,
4265    ) -> Task<Result<Vec<LocationLink>>> {
4266        let position = position.to_point_utf16(buffer.read(cx));
4267        self.request_lsp(
4268            buffer.clone(),
4269            LanguageServerToQuery::Primary,
4270            GetDefinition { position },
4271            cx,
4272        )
4273    }
4274
4275    pub fn type_definition<T: ToPointUtf16>(
4276        &self,
4277        buffer: &ModelHandle<Buffer>,
4278        position: T,
4279        cx: &mut ModelContext<Self>,
4280    ) -> Task<Result<Vec<LocationLink>>> {
4281        let position = position.to_point_utf16(buffer.read(cx));
4282        self.request_lsp(
4283            buffer.clone(),
4284            LanguageServerToQuery::Primary,
4285            GetTypeDefinition { position },
4286            cx,
4287        )
4288    }
4289
4290    pub fn references<T: ToPointUtf16>(
4291        &self,
4292        buffer: &ModelHandle<Buffer>,
4293        position: T,
4294        cx: &mut ModelContext<Self>,
4295    ) -> Task<Result<Vec<Location>>> {
4296        let position = position.to_point_utf16(buffer.read(cx));
4297        self.request_lsp(
4298            buffer.clone(),
4299            LanguageServerToQuery::Primary,
4300            GetReferences { position },
4301            cx,
4302        )
4303    }
4304
4305    pub fn document_highlights<T: ToPointUtf16>(
4306        &self,
4307        buffer: &ModelHandle<Buffer>,
4308        position: T,
4309        cx: &mut ModelContext<Self>,
4310    ) -> Task<Result<Vec<DocumentHighlight>>> {
4311        let position = position.to_point_utf16(buffer.read(cx));
4312        self.request_lsp(
4313            buffer.clone(),
4314            LanguageServerToQuery::Primary,
4315            GetDocumentHighlights { position },
4316            cx,
4317        )
4318    }
4319
4320    pub fn symbols(&self, query: &str, cx: &mut ModelContext<Self>) -> Task<Result<Vec<Symbol>>> {
4321        if self.is_local() {
4322            let mut requests = Vec::new();
4323            for ((worktree_id, _), server_id) in self.language_server_ids.iter() {
4324                let worktree_id = *worktree_id;
4325                let worktree_handle = self.worktree_for_id(worktree_id, cx);
4326                let worktree = match worktree_handle.and_then(|tree| tree.read(cx).as_local()) {
4327                    Some(worktree) => worktree,
4328                    None => continue,
4329                };
4330                let worktree_abs_path = worktree.abs_path().clone();
4331
4332                let (adapter, language, server) = match self.language_servers.get(server_id) {
4333                    Some(LanguageServerState::Running {
4334                        adapter,
4335                        language,
4336                        server,
4337                        ..
4338                    }) => (adapter.clone(), language.clone(), server),
4339
4340                    _ => continue,
4341                };
4342
4343                requests.push(
4344                    server
4345                        .request::<lsp::request::WorkspaceSymbolRequest>(
4346                            lsp::WorkspaceSymbolParams {
4347                                query: query.to_string(),
4348                                ..Default::default()
4349                            },
4350                        )
4351                        .log_err()
4352                        .map(move |response| {
4353                            let lsp_symbols = response.flatten().map(|symbol_response| match symbol_response {
4354                                lsp::WorkspaceSymbolResponse::Flat(flat_responses) => {
4355                                    flat_responses.into_iter().map(|lsp_symbol| {
4356                                        (lsp_symbol.name, lsp_symbol.kind, lsp_symbol.location)
4357                                    }).collect::<Vec<_>>()
4358                                }
4359                                lsp::WorkspaceSymbolResponse::Nested(nested_responses) => {
4360                                    nested_responses.into_iter().filter_map(|lsp_symbol| {
4361                                        let location = match lsp_symbol.location {
4362                                            OneOf::Left(location) => location,
4363                                            OneOf::Right(_) => {
4364                                                error!("Unexpected: client capabilities forbid symbol resolutions in workspace.symbol.resolveSupport");
4365                                                return None
4366                                            }
4367                                        };
4368                                        Some((lsp_symbol.name, lsp_symbol.kind, location))
4369                                    }).collect::<Vec<_>>()
4370                                }
4371                            }).unwrap_or_default();
4372
4373                            (
4374                                adapter,
4375                                language,
4376                                worktree_id,
4377                                worktree_abs_path,
4378                                lsp_symbols,
4379                            )
4380                        }),
4381                );
4382            }
4383
4384            cx.spawn_weak(|this, cx| async move {
4385                let responses = futures::future::join_all(requests).await;
4386                let this = match this.upgrade(&cx) {
4387                    Some(this) => this,
4388                    None => return Ok(Vec::new()),
4389                };
4390
4391                let symbols = this.read_with(&cx, |this, cx| {
4392                    let mut symbols = Vec::new();
4393                    for (
4394                        adapter,
4395                        adapter_language,
4396                        source_worktree_id,
4397                        worktree_abs_path,
4398                        lsp_symbols,
4399                    ) in responses
4400                    {
4401                        symbols.extend(lsp_symbols.into_iter().filter_map(
4402                            |(symbol_name, symbol_kind, symbol_location)| {
4403                                let abs_path = symbol_location.uri.to_file_path().ok()?;
4404                                let mut worktree_id = source_worktree_id;
4405                                let path;
4406                                if let Some((worktree, rel_path)) =
4407                                    this.find_local_worktree(&abs_path, cx)
4408                                {
4409                                    worktree_id = worktree.read(cx).id();
4410                                    path = rel_path;
4411                                } else {
4412                                    path = relativize_path(&worktree_abs_path, &abs_path);
4413                                }
4414
4415                                let project_path = ProjectPath {
4416                                    worktree_id,
4417                                    path: path.into(),
4418                                };
4419                                let signature = this.symbol_signature(&project_path);
4420                                let adapter_language = adapter_language.clone();
4421                                let language = this
4422                                    .languages
4423                                    .language_for_file(&project_path.path, None)
4424                                    .unwrap_or_else(move |_| adapter_language);
4425                                let language_server_name = adapter.name.clone();
4426                                Some(async move {
4427                                    let language = language.await;
4428                                    let label =
4429                                        language.label_for_symbol(&symbol_name, symbol_kind).await;
4430
4431                                    Symbol {
4432                                        language_server_name,
4433                                        source_worktree_id,
4434                                        path: project_path,
4435                                        label: label.unwrap_or_else(|| {
4436                                            CodeLabel::plain(symbol_name.clone(), None)
4437                                        }),
4438                                        kind: symbol_kind,
4439                                        name: symbol_name,
4440                                        range: range_from_lsp(symbol_location.range),
4441                                        signature,
4442                                    }
4443                                })
4444                            },
4445                        ));
4446                    }
4447
4448                    symbols
4449                });
4450
4451                Ok(futures::future::join_all(symbols).await)
4452            })
4453        } else if let Some(project_id) = self.remote_id() {
4454            let request = self.client.request(proto::GetProjectSymbols {
4455                project_id,
4456                query: query.to_string(),
4457            });
4458            cx.spawn_weak(|this, cx| async move {
4459                let response = request.await?;
4460                let mut symbols = Vec::new();
4461                if let Some(this) = this.upgrade(&cx) {
4462                    let new_symbols = this.read_with(&cx, |this, _| {
4463                        response
4464                            .symbols
4465                            .into_iter()
4466                            .map(|symbol| this.deserialize_symbol(symbol))
4467                            .collect::<Vec<_>>()
4468                    });
4469                    symbols = futures::future::join_all(new_symbols)
4470                        .await
4471                        .into_iter()
4472                        .filter_map(|symbol| symbol.log_err())
4473                        .collect::<Vec<_>>();
4474                }
4475                Ok(symbols)
4476            })
4477        } else {
4478            Task::ready(Ok(Default::default()))
4479        }
4480    }
4481
4482    pub fn open_buffer_for_symbol(
4483        &mut self,
4484        symbol: &Symbol,
4485        cx: &mut ModelContext<Self>,
4486    ) -> Task<Result<ModelHandle<Buffer>>> {
4487        if self.is_local() {
4488            let language_server_id = if let Some(id) = self.language_server_ids.get(&(
4489                symbol.source_worktree_id,
4490                symbol.language_server_name.clone(),
4491            )) {
4492                *id
4493            } else {
4494                return Task::ready(Err(anyhow!(
4495                    "language server for worktree and language not found"
4496                )));
4497            };
4498
4499            let worktree_abs_path = if let Some(worktree_abs_path) = self
4500                .worktree_for_id(symbol.path.worktree_id, cx)
4501                .and_then(|worktree| worktree.read(cx).as_local())
4502                .map(|local_worktree| local_worktree.abs_path())
4503            {
4504                worktree_abs_path
4505            } else {
4506                return Task::ready(Err(anyhow!("worktree not found for symbol")));
4507            };
4508            let symbol_abs_path = worktree_abs_path.join(&symbol.path.path);
4509            let symbol_uri = if let Ok(uri) = lsp::Url::from_file_path(symbol_abs_path) {
4510                uri
4511            } else {
4512                return Task::ready(Err(anyhow!("invalid symbol path")));
4513            };
4514
4515            self.open_local_buffer_via_lsp(
4516                symbol_uri,
4517                language_server_id,
4518                symbol.language_server_name.clone(),
4519                cx,
4520            )
4521        } else if let Some(project_id) = self.remote_id() {
4522            let request = self.client.request(proto::OpenBufferForSymbol {
4523                project_id,
4524                symbol: Some(serialize_symbol(symbol)),
4525            });
4526            cx.spawn(|this, mut cx| async move {
4527                let response = request.await?;
4528                this.update(&mut cx, |this, cx| {
4529                    this.wait_for_remote_buffer(response.buffer_id, cx)
4530                })
4531                .await
4532            })
4533        } else {
4534            Task::ready(Err(anyhow!("project does not have a remote id")))
4535        }
4536    }
4537
4538    pub fn hover<T: ToPointUtf16>(
4539        &self,
4540        buffer: &ModelHandle<Buffer>,
4541        position: T,
4542        cx: &mut ModelContext<Self>,
4543    ) -> Task<Result<Option<Hover>>> {
4544        let position = position.to_point_utf16(buffer.read(cx));
4545        self.request_lsp(
4546            buffer.clone(),
4547            LanguageServerToQuery::Primary,
4548            GetHover { position },
4549            cx,
4550        )
4551    }
4552
4553    pub fn completions<T: ToOffset + ToPointUtf16>(
4554        &self,
4555        buffer: &ModelHandle<Buffer>,
4556        position: T,
4557        cx: &mut ModelContext<Self>,
4558    ) -> Task<Result<Vec<Completion>>> {
4559        let position = position.to_point_utf16(buffer.read(cx));
4560        if self.is_local() {
4561            let snapshot = buffer.read(cx).snapshot();
4562            let offset = position.to_offset(&snapshot);
4563            let scope = snapshot.language_scope_at(offset);
4564
4565            let server_ids: Vec<_> = self
4566                .language_servers_for_buffer(buffer.read(cx), cx)
4567                .filter(|(_, server)| server.capabilities().completion_provider.is_some())
4568                .filter(|(adapter, _)| {
4569                    scope
4570                        .as_ref()
4571                        .map(|scope| scope.language_allowed(&adapter.name))
4572                        .unwrap_or(true)
4573                })
4574                .map(|(_, server)| server.server_id())
4575                .collect();
4576
4577            let buffer = buffer.clone();
4578            cx.spawn(|this, mut cx| async move {
4579                let mut tasks = Vec::with_capacity(server_ids.len());
4580                this.update(&mut cx, |this, cx| {
4581                    for server_id in server_ids {
4582                        tasks.push(this.request_lsp(
4583                            buffer.clone(),
4584                            LanguageServerToQuery::Other(server_id),
4585                            GetCompletions { position },
4586                            cx,
4587                        ));
4588                    }
4589                });
4590
4591                let mut completions = Vec::new();
4592                for task in tasks {
4593                    if let Ok(new_completions) = task.await {
4594                        completions.extend_from_slice(&new_completions);
4595                    }
4596                }
4597
4598                Ok(completions)
4599            })
4600        } else if let Some(project_id) = self.remote_id() {
4601            self.send_lsp_proto_request(buffer.clone(), project_id, GetCompletions { position }, cx)
4602        } else {
4603            Task::ready(Ok(Default::default()))
4604        }
4605    }
4606
4607    pub fn apply_additional_edits_for_completion(
4608        &self,
4609        buffer_handle: ModelHandle<Buffer>,
4610        completion: Completion,
4611        push_to_history: bool,
4612        cx: &mut ModelContext<Self>,
4613    ) -> Task<Result<Option<Transaction>>> {
4614        let buffer = buffer_handle.read(cx);
4615        let buffer_id = buffer.remote_id();
4616
4617        if self.is_local() {
4618            let server_id = completion.server_id;
4619            let lang_server = match self.language_server_for_buffer(buffer, server_id, cx) {
4620                Some((_, server)) => server.clone(),
4621                _ => return Task::ready(Ok(Default::default())),
4622            };
4623
4624            cx.spawn(|this, mut cx| async move {
4625                let can_resolve = lang_server
4626                    .capabilities()
4627                    .completion_provider
4628                    .as_ref()
4629                    .and_then(|options| options.resolve_provider)
4630                    .unwrap_or(false);
4631                let additional_text_edits = if can_resolve {
4632                    lang_server
4633                        .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
4634                        .await?
4635                        .additional_text_edits
4636                } else {
4637                    completion.lsp_completion.additional_text_edits
4638                };
4639                if let Some(edits) = additional_text_edits {
4640                    let edits = this
4641                        .update(&mut cx, |this, cx| {
4642                            this.edits_from_lsp(
4643                                &buffer_handle,
4644                                edits,
4645                                lang_server.server_id(),
4646                                None,
4647                                cx,
4648                            )
4649                        })
4650                        .await?;
4651
4652                    buffer_handle.update(&mut cx, |buffer, cx| {
4653                        buffer.finalize_last_transaction();
4654                        buffer.start_transaction();
4655
4656                        for (range, text) in edits {
4657                            let primary = &completion.old_range;
4658                            let start_within = primary.start.cmp(&range.start, buffer).is_le()
4659                                && primary.end.cmp(&range.start, buffer).is_ge();
4660                            let end_within = range.start.cmp(&primary.end, buffer).is_le()
4661                                && range.end.cmp(&primary.end, buffer).is_ge();
4662
4663                            //Skip additional edits which overlap with the primary completion edit
4664                            //https://github.com/zed-industries/zed/pull/1871
4665                            if !start_within && !end_within {
4666                                buffer.edit([(range, text)], None, cx);
4667                            }
4668                        }
4669
4670                        let transaction = if buffer.end_transaction(cx).is_some() {
4671                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
4672                            if !push_to_history {
4673                                buffer.forget_transaction(transaction.id);
4674                            }
4675                            Some(transaction)
4676                        } else {
4677                            None
4678                        };
4679                        Ok(transaction)
4680                    })
4681                } else {
4682                    Ok(None)
4683                }
4684            })
4685        } else if let Some(project_id) = self.remote_id() {
4686            let client = self.client.clone();
4687            cx.spawn(|_, mut cx| async move {
4688                let response = client
4689                    .request(proto::ApplyCompletionAdditionalEdits {
4690                        project_id,
4691                        buffer_id,
4692                        completion: Some(language::proto::serialize_completion(&completion)),
4693                    })
4694                    .await?;
4695
4696                if let Some(transaction) = response.transaction {
4697                    let transaction = language::proto::deserialize_transaction(transaction)?;
4698                    buffer_handle
4699                        .update(&mut cx, |buffer, _| {
4700                            buffer.wait_for_edits(transaction.edit_ids.iter().copied())
4701                        })
4702                        .await?;
4703                    if push_to_history {
4704                        buffer_handle.update(&mut cx, |buffer, _| {
4705                            buffer.push_transaction(transaction.clone(), Instant::now());
4706                        });
4707                    }
4708                    Ok(Some(transaction))
4709                } else {
4710                    Ok(None)
4711                }
4712            })
4713        } else {
4714            Task::ready(Err(anyhow!("project does not have a remote id")))
4715        }
4716    }
4717
4718    pub fn code_actions<T: Clone + ToOffset>(
4719        &self,
4720        buffer_handle: &ModelHandle<Buffer>,
4721        range: Range<T>,
4722        cx: &mut ModelContext<Self>,
4723    ) -> Task<Result<Vec<CodeAction>>> {
4724        let buffer = buffer_handle.read(cx);
4725        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
4726        self.request_lsp(
4727            buffer_handle.clone(),
4728            LanguageServerToQuery::Primary,
4729            GetCodeActions { range },
4730            cx,
4731        )
4732    }
4733
4734    pub fn apply_code_action(
4735        &self,
4736        buffer_handle: ModelHandle<Buffer>,
4737        mut action: CodeAction,
4738        push_to_history: bool,
4739        cx: &mut ModelContext<Self>,
4740    ) -> Task<Result<ProjectTransaction>> {
4741        if self.is_local() {
4742            let buffer = buffer_handle.read(cx);
4743            let (lsp_adapter, lang_server) = if let Some((adapter, server)) =
4744                self.language_server_for_buffer(buffer, action.server_id, cx)
4745            {
4746                (adapter.clone(), server.clone())
4747            } else {
4748                return Task::ready(Ok(Default::default()));
4749            };
4750            let range = action.range.to_point_utf16(buffer);
4751
4752            cx.spawn(|this, mut cx| async move {
4753                if let Some(lsp_range) = action
4754                    .lsp_action
4755                    .data
4756                    .as_mut()
4757                    .and_then(|d| d.get_mut("codeActionParams"))
4758                    .and_then(|d| d.get_mut("range"))
4759                {
4760                    *lsp_range = serde_json::to_value(&range_to_lsp(range)).unwrap();
4761                    action.lsp_action = lang_server
4762                        .request::<lsp::request::CodeActionResolveRequest>(action.lsp_action)
4763                        .await?;
4764                } else {
4765                    let actions = this
4766                        .update(&mut cx, |this, cx| {
4767                            this.code_actions(&buffer_handle, action.range, cx)
4768                        })
4769                        .await?;
4770                    action.lsp_action = actions
4771                        .into_iter()
4772                        .find(|a| a.lsp_action.title == action.lsp_action.title)
4773                        .ok_or_else(|| anyhow!("code action is outdated"))?
4774                        .lsp_action;
4775                }
4776
4777                if let Some(edit) = action.lsp_action.edit {
4778                    if edit.changes.is_some() || edit.document_changes.is_some() {
4779                        return Self::deserialize_workspace_edit(
4780                            this,
4781                            edit,
4782                            push_to_history,
4783                            lsp_adapter.clone(),
4784                            lang_server.clone(),
4785                            &mut cx,
4786                        )
4787                        .await;
4788                    }
4789                }
4790
4791                if let Some(command) = action.lsp_action.command {
4792                    this.update(&mut cx, |this, _| {
4793                        this.last_workspace_edits_by_language_server
4794                            .remove(&lang_server.server_id());
4795                    });
4796
4797                    let result = lang_server
4798                        .request::<lsp::request::ExecuteCommand>(lsp::ExecuteCommandParams {
4799                            command: command.command,
4800                            arguments: command.arguments.unwrap_or_default(),
4801                            ..Default::default()
4802                        })
4803                        .await;
4804
4805                    if let Err(err) = result {
4806                        // TODO: LSP ERROR
4807                        return Err(err);
4808                    }
4809
4810                    return Ok(this.update(&mut cx, |this, _| {
4811                        this.last_workspace_edits_by_language_server
4812                            .remove(&lang_server.server_id())
4813                            .unwrap_or_default()
4814                    }));
4815                }
4816
4817                Ok(ProjectTransaction::default())
4818            })
4819        } else if let Some(project_id) = self.remote_id() {
4820            let client = self.client.clone();
4821            let request = proto::ApplyCodeAction {
4822                project_id,
4823                buffer_id: buffer_handle.read(cx).remote_id(),
4824                action: Some(language::proto::serialize_code_action(&action)),
4825            };
4826            cx.spawn(|this, mut cx| async move {
4827                let response = client
4828                    .request(request)
4829                    .await?
4830                    .transaction
4831                    .ok_or_else(|| anyhow!("missing transaction"))?;
4832                this.update(&mut cx, |this, cx| {
4833                    this.deserialize_project_transaction(response, push_to_history, cx)
4834                })
4835                .await
4836            })
4837        } else {
4838            Task::ready(Err(anyhow!("project does not have a remote id")))
4839        }
4840    }
4841
4842    fn apply_on_type_formatting(
4843        &self,
4844        buffer: ModelHandle<Buffer>,
4845        position: Anchor,
4846        trigger: String,
4847        cx: &mut ModelContext<Self>,
4848    ) -> Task<Result<Option<Transaction>>> {
4849        if self.is_local() {
4850            cx.spawn(|this, mut cx| async move {
4851                // Do not allow multiple concurrent formatting requests for the
4852                // same buffer.
4853                this.update(&mut cx, |this, cx| {
4854                    this.buffers_being_formatted
4855                        .insert(buffer.read(cx).remote_id())
4856                });
4857
4858                let _cleanup = defer({
4859                    let this = this.clone();
4860                    let mut cx = cx.clone();
4861                    let closure_buffer = buffer.clone();
4862                    move || {
4863                        this.update(&mut cx, |this, cx| {
4864                            this.buffers_being_formatted
4865                                .remove(&closure_buffer.read(cx).remote_id());
4866                        });
4867                    }
4868                });
4869
4870                buffer
4871                    .update(&mut cx, |buffer, _| {
4872                        buffer.wait_for_edits(Some(position.timestamp))
4873                    })
4874                    .await?;
4875                this.update(&mut cx, |this, cx| {
4876                    let position = position.to_point_utf16(buffer.read(cx));
4877                    this.on_type_format(buffer, position, trigger, false, cx)
4878                })
4879                .await
4880            })
4881        } else if let Some(project_id) = self.remote_id() {
4882            let client = self.client.clone();
4883            let request = proto::OnTypeFormatting {
4884                project_id,
4885                buffer_id: buffer.read(cx).remote_id(),
4886                position: Some(serialize_anchor(&position)),
4887                trigger,
4888                version: serialize_version(&buffer.read(cx).version()),
4889            };
4890            cx.spawn(|_, _| async move {
4891                client
4892                    .request(request)
4893                    .await?
4894                    .transaction
4895                    .map(language::proto::deserialize_transaction)
4896                    .transpose()
4897            })
4898        } else {
4899            Task::ready(Err(anyhow!("project does not have a remote id")))
4900        }
4901    }
4902
4903    async fn deserialize_edits(
4904        this: ModelHandle<Self>,
4905        buffer_to_edit: ModelHandle<Buffer>,
4906        edits: Vec<lsp::TextEdit>,
4907        push_to_history: bool,
4908        _: Arc<CachedLspAdapter>,
4909        language_server: Arc<LanguageServer>,
4910        cx: &mut AsyncAppContext,
4911    ) -> Result<Option<Transaction>> {
4912        let edits = this
4913            .update(cx, |this, cx| {
4914                this.edits_from_lsp(
4915                    &buffer_to_edit,
4916                    edits,
4917                    language_server.server_id(),
4918                    None,
4919                    cx,
4920                )
4921            })
4922            .await?;
4923
4924        let transaction = buffer_to_edit.update(cx, |buffer, cx| {
4925            buffer.finalize_last_transaction();
4926            buffer.start_transaction();
4927            for (range, text) in edits {
4928                buffer.edit([(range, text)], None, cx);
4929            }
4930
4931            if buffer.end_transaction(cx).is_some() {
4932                let transaction = buffer.finalize_last_transaction().unwrap().clone();
4933                if !push_to_history {
4934                    buffer.forget_transaction(transaction.id);
4935                }
4936                Some(transaction)
4937            } else {
4938                None
4939            }
4940        });
4941
4942        Ok(transaction)
4943    }
4944
4945    async fn deserialize_workspace_edit(
4946        this: ModelHandle<Self>,
4947        edit: lsp::WorkspaceEdit,
4948        push_to_history: bool,
4949        lsp_adapter: Arc<CachedLspAdapter>,
4950        language_server: Arc<LanguageServer>,
4951        cx: &mut AsyncAppContext,
4952    ) -> Result<ProjectTransaction> {
4953        let fs = this.read_with(cx, |this, _| this.fs.clone());
4954        let mut operations = Vec::new();
4955        if let Some(document_changes) = edit.document_changes {
4956            match document_changes {
4957                lsp::DocumentChanges::Edits(edits) => {
4958                    operations.extend(edits.into_iter().map(lsp::DocumentChangeOperation::Edit))
4959                }
4960                lsp::DocumentChanges::Operations(ops) => operations = ops,
4961            }
4962        } else if let Some(changes) = edit.changes {
4963            operations.extend(changes.into_iter().map(|(uri, edits)| {
4964                lsp::DocumentChangeOperation::Edit(lsp::TextDocumentEdit {
4965                    text_document: lsp::OptionalVersionedTextDocumentIdentifier {
4966                        uri,
4967                        version: None,
4968                    },
4969                    edits: edits.into_iter().map(OneOf::Left).collect(),
4970                })
4971            }));
4972        }
4973
4974        let mut project_transaction = ProjectTransaction::default();
4975        for operation in operations {
4976            match operation {
4977                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Create(op)) => {
4978                    let abs_path = op
4979                        .uri
4980                        .to_file_path()
4981                        .map_err(|_| anyhow!("can't convert URI to path"))?;
4982
4983                    if let Some(parent_path) = abs_path.parent() {
4984                        fs.create_dir(parent_path).await?;
4985                    }
4986                    if abs_path.ends_with("/") {
4987                        fs.create_dir(&abs_path).await?;
4988                    } else {
4989                        fs.create_file(
4990                            &abs_path,
4991                            op.options
4992                                .map(|options| fs::CreateOptions {
4993                                    overwrite: options.overwrite.unwrap_or(false),
4994                                    ignore_if_exists: options.ignore_if_exists.unwrap_or(false),
4995                                })
4996                                .unwrap_or_default(),
4997                        )
4998                        .await?;
4999                    }
5000                }
5001
5002                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Rename(op)) => {
5003                    let source_abs_path = op
5004                        .old_uri
5005                        .to_file_path()
5006                        .map_err(|_| anyhow!("can't convert URI to path"))?;
5007                    let target_abs_path = op
5008                        .new_uri
5009                        .to_file_path()
5010                        .map_err(|_| anyhow!("can't convert URI to path"))?;
5011                    fs.rename(
5012                        &source_abs_path,
5013                        &target_abs_path,
5014                        op.options
5015                            .map(|options| fs::RenameOptions {
5016                                overwrite: options.overwrite.unwrap_or(false),
5017                                ignore_if_exists: options.ignore_if_exists.unwrap_or(false),
5018                            })
5019                            .unwrap_or_default(),
5020                    )
5021                    .await?;
5022                }
5023
5024                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Delete(op)) => {
5025                    let abs_path = op
5026                        .uri
5027                        .to_file_path()
5028                        .map_err(|_| anyhow!("can't convert URI to path"))?;
5029                    let options = op
5030                        .options
5031                        .map(|options| fs::RemoveOptions {
5032                            recursive: options.recursive.unwrap_or(false),
5033                            ignore_if_not_exists: options.ignore_if_not_exists.unwrap_or(false),
5034                        })
5035                        .unwrap_or_default();
5036                    if abs_path.ends_with("/") {
5037                        fs.remove_dir(&abs_path, options).await?;
5038                    } else {
5039                        fs.remove_file(&abs_path, options).await?;
5040                    }
5041                }
5042
5043                lsp::DocumentChangeOperation::Edit(op) => {
5044                    let buffer_to_edit = this
5045                        .update(cx, |this, cx| {
5046                            this.open_local_buffer_via_lsp(
5047                                op.text_document.uri,
5048                                language_server.server_id(),
5049                                lsp_adapter.name.clone(),
5050                                cx,
5051                            )
5052                        })
5053                        .await?;
5054
5055                    let edits = this
5056                        .update(cx, |this, cx| {
5057                            let edits = op.edits.into_iter().map(|edit| match edit {
5058                                OneOf::Left(edit) => edit,
5059                                OneOf::Right(edit) => edit.text_edit,
5060                            });
5061                            this.edits_from_lsp(
5062                                &buffer_to_edit,
5063                                edits,
5064                                language_server.server_id(),
5065                                op.text_document.version,
5066                                cx,
5067                            )
5068                        })
5069                        .await?;
5070
5071                    let transaction = buffer_to_edit.update(cx, |buffer, cx| {
5072                        buffer.finalize_last_transaction();
5073                        buffer.start_transaction();
5074                        for (range, text) in edits {
5075                            buffer.edit([(range, text)], None, cx);
5076                        }
5077                        let transaction = if buffer.end_transaction(cx).is_some() {
5078                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
5079                            if !push_to_history {
5080                                buffer.forget_transaction(transaction.id);
5081                            }
5082                            Some(transaction)
5083                        } else {
5084                            None
5085                        };
5086
5087                        transaction
5088                    });
5089                    if let Some(transaction) = transaction {
5090                        project_transaction.0.insert(buffer_to_edit, transaction);
5091                    }
5092                }
5093            }
5094        }
5095
5096        Ok(project_transaction)
5097    }
5098
5099    pub fn prepare_rename<T: ToPointUtf16>(
5100        &self,
5101        buffer: ModelHandle<Buffer>,
5102        position: T,
5103        cx: &mut ModelContext<Self>,
5104    ) -> Task<Result<Option<Range<Anchor>>>> {
5105        let position = position.to_point_utf16(buffer.read(cx));
5106        self.request_lsp(
5107            buffer,
5108            LanguageServerToQuery::Primary,
5109            PrepareRename { position },
5110            cx,
5111        )
5112    }
5113
5114    pub fn perform_rename<T: ToPointUtf16>(
5115        &self,
5116        buffer: ModelHandle<Buffer>,
5117        position: T,
5118        new_name: String,
5119        push_to_history: bool,
5120        cx: &mut ModelContext<Self>,
5121    ) -> Task<Result<ProjectTransaction>> {
5122        let position = position.to_point_utf16(buffer.read(cx));
5123        self.request_lsp(
5124            buffer,
5125            LanguageServerToQuery::Primary,
5126            PerformRename {
5127                position,
5128                new_name,
5129                push_to_history,
5130            },
5131            cx,
5132        )
5133    }
5134
5135    pub fn on_type_format<T: ToPointUtf16>(
5136        &self,
5137        buffer: ModelHandle<Buffer>,
5138        position: T,
5139        trigger: String,
5140        push_to_history: bool,
5141        cx: &mut ModelContext<Self>,
5142    ) -> Task<Result<Option<Transaction>>> {
5143        let (position, tab_size) = buffer.read_with(cx, |buffer, cx| {
5144            let position = position.to_point_utf16(buffer);
5145            (
5146                position,
5147                language_settings(buffer.language_at(position).as_ref(), buffer.file(), cx)
5148                    .tab_size,
5149            )
5150        });
5151        self.request_lsp(
5152            buffer.clone(),
5153            LanguageServerToQuery::Primary,
5154            OnTypeFormatting {
5155                position,
5156                trigger,
5157                options: lsp_command::lsp_formatting_options(tab_size.get()).into(),
5158                push_to_history,
5159            },
5160            cx,
5161        )
5162    }
5163
5164    pub fn inlay_hints<T: ToOffset>(
5165        &self,
5166        buffer_handle: ModelHandle<Buffer>,
5167        range: Range<T>,
5168        cx: &mut ModelContext<Self>,
5169    ) -> Task<anyhow::Result<Vec<InlayHint>>> {
5170        let buffer = buffer_handle.read(cx);
5171        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
5172        let range_start = range.start;
5173        let range_end = range.end;
5174        let buffer_id = buffer.remote_id();
5175        let buffer_version = buffer.version().clone();
5176        let lsp_request = InlayHints { range };
5177
5178        if self.is_local() {
5179            let lsp_request_task = self.request_lsp(
5180                buffer_handle.clone(),
5181                LanguageServerToQuery::Primary,
5182                lsp_request,
5183                cx,
5184            );
5185            cx.spawn(|_, mut cx| async move {
5186                buffer_handle
5187                    .update(&mut cx, |buffer, _| {
5188                        buffer.wait_for_edits(vec![range_start.timestamp, range_end.timestamp])
5189                    })
5190                    .await
5191                    .context("waiting for inlay hint request range edits")?;
5192                lsp_request_task.await.context("inlay hints LSP request")
5193            })
5194        } else if let Some(project_id) = self.remote_id() {
5195            let client = self.client.clone();
5196            let request = proto::InlayHints {
5197                project_id,
5198                buffer_id,
5199                start: Some(serialize_anchor(&range_start)),
5200                end: Some(serialize_anchor(&range_end)),
5201                version: serialize_version(&buffer_version),
5202            };
5203            cx.spawn(|project, cx| async move {
5204                let response = client
5205                    .request(request)
5206                    .await
5207                    .context("inlay hints proto request")?;
5208                let hints_request_result = LspCommand::response_from_proto(
5209                    lsp_request,
5210                    response,
5211                    project,
5212                    buffer_handle.clone(),
5213                    cx,
5214                )
5215                .await;
5216
5217                hints_request_result.context("inlay hints proto response conversion")
5218            })
5219        } else {
5220            Task::ready(Err(anyhow!("project does not have a remote id")))
5221        }
5222    }
5223
5224    pub fn resolve_inlay_hint(
5225        &self,
5226        hint: InlayHint,
5227        buffer_handle: ModelHandle<Buffer>,
5228        server_id: LanguageServerId,
5229        cx: &mut ModelContext<Self>,
5230    ) -> Task<anyhow::Result<InlayHint>> {
5231        if self.is_local() {
5232            let buffer = buffer_handle.read(cx);
5233            let (_, lang_server) = if let Some((adapter, server)) =
5234                self.language_server_for_buffer(buffer, server_id, cx)
5235            {
5236                (adapter.clone(), server.clone())
5237            } else {
5238                return Task::ready(Ok(hint));
5239            };
5240            if !InlayHints::can_resolve_inlays(lang_server.capabilities()) {
5241                return Task::ready(Ok(hint));
5242            }
5243
5244            let buffer_snapshot = buffer.snapshot();
5245            cx.spawn(|_, mut cx| async move {
5246                let resolve_task = lang_server.request::<lsp::request::InlayHintResolveRequest>(
5247                    InlayHints::project_to_lsp_hint(hint, &buffer_snapshot),
5248                );
5249                let resolved_hint = resolve_task
5250                    .await
5251                    .context("inlay hint resolve LSP request")?;
5252                let resolved_hint = InlayHints::lsp_to_project_hint(
5253                    resolved_hint,
5254                    &buffer_handle,
5255                    server_id,
5256                    ResolveState::Resolved,
5257                    false,
5258                    &mut cx,
5259                )
5260                .await?;
5261                Ok(resolved_hint)
5262            })
5263        } else if let Some(project_id) = self.remote_id() {
5264            let client = self.client.clone();
5265            let request = proto::ResolveInlayHint {
5266                project_id,
5267                buffer_id: buffer_handle.read(cx).remote_id(),
5268                language_server_id: server_id.0 as u64,
5269                hint: Some(InlayHints::project_to_proto_hint(hint.clone())),
5270            };
5271            cx.spawn(|_, _| async move {
5272                let response = client
5273                    .request(request)
5274                    .await
5275                    .context("inlay hints proto request")?;
5276                match response.hint {
5277                    Some(resolved_hint) => InlayHints::proto_to_project_hint(resolved_hint)
5278                        .context("inlay hints proto resolve response conversion"),
5279                    None => Ok(hint),
5280                }
5281            })
5282        } else {
5283            Task::ready(Err(anyhow!("project does not have a remote id")))
5284        }
5285    }
5286
5287    #[allow(clippy::type_complexity)]
5288    pub fn search(
5289        &self,
5290        query: SearchQuery,
5291        cx: &mut ModelContext<Self>,
5292    ) -> Receiver<(ModelHandle<Buffer>, Vec<Range<Anchor>>)> {
5293        if self.is_local() {
5294            self.search_local(query, cx)
5295        } else if let Some(project_id) = self.remote_id() {
5296            let (tx, rx) = smol::channel::unbounded();
5297            let request = self.client.request(query.to_proto(project_id));
5298            cx.spawn(|this, mut cx| async move {
5299                let response = request.await?;
5300                let mut result = HashMap::default();
5301                for location in response.locations {
5302                    let target_buffer = this
5303                        .update(&mut cx, |this, cx| {
5304                            this.wait_for_remote_buffer(location.buffer_id, cx)
5305                        })
5306                        .await?;
5307                    let start = location
5308                        .start
5309                        .and_then(deserialize_anchor)
5310                        .ok_or_else(|| anyhow!("missing target start"))?;
5311                    let end = location
5312                        .end
5313                        .and_then(deserialize_anchor)
5314                        .ok_or_else(|| anyhow!("missing target end"))?;
5315                    result
5316                        .entry(target_buffer)
5317                        .or_insert(Vec::new())
5318                        .push(start..end)
5319                }
5320                for (buffer, ranges) in result {
5321                    let _ = tx.send((buffer, ranges)).await;
5322                }
5323                Result::<(), anyhow::Error>::Ok(())
5324            })
5325            .detach_and_log_err(cx);
5326            rx
5327        } else {
5328            unimplemented!();
5329        }
5330    }
5331
5332    pub fn search_local(
5333        &self,
5334        query: SearchQuery,
5335        cx: &mut ModelContext<Self>,
5336    ) -> Receiver<(ModelHandle<Buffer>, Vec<Range<Anchor>>)> {
5337        // Local search is split into several phases.
5338        // TL;DR is that we do 2 passes; initial pass to pick files which contain at least one match
5339        // and the second phase that finds positions of all the matches found in the candidate files.
5340        // The Receiver obtained from this function returns matches sorted by buffer path. Files without a buffer path are reported first.
5341        //
5342        // It gets a bit hairy though, because we must account for files that do not have a persistent representation
5343        // on FS. Namely, if you have an untitled buffer or unsaved changes in a buffer, we want to scan that too.
5344        //
5345        // 1. We initialize a queue of match candidates and feed all opened buffers into it (== unsaved files / untitled buffers).
5346        //    Then, we go through a worktree and check for files that do match a predicate. If the file had an opened version, we skip the scan
5347        //    of FS version for that file altogether - after all, what we have in memory is more up-to-date than what's in FS.
5348        // 2. At this point, we have a list of all potentially matching buffers/files.
5349        //    We sort that list by buffer path - this list is retained for later use.
5350        //    We ensure that all buffers are now opened and available in project.
5351        // 3. We run a scan over all the candidate buffers on multiple background threads.
5352        //    We cannot assume that there will even be a match - while at least one match
5353        //    is guaranteed for files obtained from FS, the buffers we got from memory (unsaved files/unnamed buffers) might not have a match at all.
5354        //    There is also an auxilliary background thread responsible for result gathering.
5355        //    This is where the sorted list of buffers comes into play to maintain sorted order; Whenever this background thread receives a notification (buffer has/doesn't have matches),
5356        //    it keeps it around. It reports matches in sorted order, though it accepts them in unsorted order as well.
5357        //    As soon as the match info on next position in sorted order becomes available, it reports it (if it's a match) or skips to the next
5358        //    entry - which might already be available thanks to out-of-order processing.
5359        //
5360        // We could also report matches fully out-of-order, without maintaining a sorted list of matching paths.
5361        // This however would mean that project search (that is the main user of this function) would have to do the sorting itself, on the go.
5362        // This isn't as straightforward as running an insertion sort sadly, and would also mean that it would have to care about maintaining match index
5363        // in face of constantly updating list of sorted matches.
5364        // Meanwhile, this implementation offers index stability, since the matches are already reported in a sorted order.
5365        let snapshots = self
5366            .visible_worktrees(cx)
5367            .filter_map(|tree| {
5368                let tree = tree.read(cx).as_local()?;
5369                Some(tree.snapshot())
5370            })
5371            .collect::<Vec<_>>();
5372
5373        let background = cx.background().clone();
5374        let path_count: usize = snapshots.iter().map(|s| s.visible_file_count()).sum();
5375        if path_count == 0 {
5376            let (_, rx) = smol::channel::bounded(1024);
5377            return rx;
5378        }
5379        let workers = background.num_cpus().min(path_count);
5380        let (matching_paths_tx, matching_paths_rx) = smol::channel::bounded(1024);
5381        let mut unnamed_files = vec![];
5382        let opened_buffers = self
5383            .opened_buffers
5384            .iter()
5385            .filter_map(|(_, b)| {
5386                let buffer = b.upgrade(cx)?;
5387                let snapshot = buffer.read_with(cx, |buffer, _| buffer.snapshot());
5388                if let Some(path) = snapshot.file().map(|file| file.path()) {
5389                    Some((path.clone(), (buffer, snapshot)))
5390                } else {
5391                    unnamed_files.push(buffer);
5392                    None
5393                }
5394            })
5395            .collect();
5396        cx.background()
5397            .spawn(Self::background_search(
5398                unnamed_files,
5399                opened_buffers,
5400                cx.background().clone(),
5401                self.fs.clone(),
5402                workers,
5403                query.clone(),
5404                path_count,
5405                snapshots,
5406                matching_paths_tx,
5407            ))
5408            .detach();
5409
5410        let (buffers, buffers_rx) = Self::sort_candidates_and_open_buffers(matching_paths_rx, cx);
5411        let background = cx.background().clone();
5412        let (result_tx, result_rx) = smol::channel::bounded(1024);
5413        cx.background()
5414            .spawn(async move {
5415                let Ok(buffers) = buffers.await else {
5416                    return;
5417                };
5418
5419                let buffers_len = buffers.len();
5420                if buffers_len == 0 {
5421                    return;
5422                }
5423                let query = &query;
5424                let (finished_tx, mut finished_rx) = smol::channel::unbounded();
5425                background
5426                    .scoped(|scope| {
5427                        #[derive(Clone)]
5428                        struct FinishedStatus {
5429                            entry: Option<(ModelHandle<Buffer>, Vec<Range<Anchor>>)>,
5430                            buffer_index: SearchMatchCandidateIndex,
5431                        }
5432
5433                        for _ in 0..workers {
5434                            let finished_tx = finished_tx.clone();
5435                            let mut buffers_rx = buffers_rx.clone();
5436                            scope.spawn(async move {
5437                                while let Some((entry, buffer_index)) = buffers_rx.next().await {
5438                                    let buffer_matches = if let Some((_, snapshot)) = entry.as_ref()
5439                                    {
5440                                        if query.file_matches(
5441                                            snapshot.file().map(|file| file.path().as_ref()),
5442                                        ) {
5443                                            query
5444                                                .search(&snapshot, None)
5445                                                .await
5446                                                .iter()
5447                                                .map(|range| {
5448                                                    snapshot.anchor_before(range.start)
5449                                                        ..snapshot.anchor_after(range.end)
5450                                                })
5451                                                .collect()
5452                                        } else {
5453                                            Vec::new()
5454                                        }
5455                                    } else {
5456                                        Vec::new()
5457                                    };
5458
5459                                    let status = if !buffer_matches.is_empty() {
5460                                        let entry = if let Some((buffer, _)) = entry.as_ref() {
5461                                            Some((buffer.clone(), buffer_matches))
5462                                        } else {
5463                                            None
5464                                        };
5465                                        FinishedStatus {
5466                                            entry,
5467                                            buffer_index,
5468                                        }
5469                                    } else {
5470                                        FinishedStatus {
5471                                            entry: None,
5472                                            buffer_index,
5473                                        }
5474                                    };
5475                                    if finished_tx.send(status).await.is_err() {
5476                                        break;
5477                                    }
5478                                }
5479                            });
5480                        }
5481                        // Report sorted matches
5482                        scope.spawn(async move {
5483                            let mut current_index = 0;
5484                            let mut scratch = vec![None; buffers_len];
5485                            while let Some(status) = finished_rx.next().await {
5486                                debug_assert!(
5487                                    scratch[status.buffer_index].is_none(),
5488                                    "Got match status of position {} twice",
5489                                    status.buffer_index
5490                                );
5491                                let index = status.buffer_index;
5492                                scratch[index] = Some(status);
5493                                while current_index < buffers_len {
5494                                    let Some(current_entry) = scratch[current_index].take() else {
5495                                        // We intentionally **do not** increment `current_index` here. When next element arrives
5496                                        // from `finished_rx`, we will inspect the same position again, hoping for it to be Some(_)
5497                                        // this time.
5498                                        break;
5499                                    };
5500                                    if let Some(entry) = current_entry.entry {
5501                                        result_tx.send(entry).await.log_err();
5502                                    }
5503                                    current_index += 1;
5504                                }
5505                                if current_index == buffers_len {
5506                                    break;
5507                                }
5508                            }
5509                        });
5510                    })
5511                    .await;
5512            })
5513            .detach();
5514        result_rx
5515    }
5516    /// Pick paths that might potentially contain a match of a given search query.
5517    async fn background_search(
5518        unnamed_buffers: Vec<ModelHandle<Buffer>>,
5519        opened_buffers: HashMap<Arc<Path>, (ModelHandle<Buffer>, BufferSnapshot)>,
5520        background: Arc<Background>,
5521        fs: Arc<dyn Fs>,
5522        workers: usize,
5523        query: SearchQuery,
5524        path_count: usize,
5525        snapshots: Vec<LocalSnapshot>,
5526        matching_paths_tx: Sender<SearchMatchCandidate>,
5527    ) {
5528        let fs = &fs;
5529        let query = &query;
5530        let matching_paths_tx = &matching_paths_tx;
5531        let snapshots = &snapshots;
5532        let paths_per_worker = (path_count + workers - 1) / workers;
5533        for buffer in unnamed_buffers {
5534            matching_paths_tx
5535                .send(SearchMatchCandidate::OpenBuffer {
5536                    buffer: buffer.clone(),
5537                    path: None,
5538                })
5539                .await
5540                .log_err();
5541        }
5542        for (path, (buffer, _)) in opened_buffers.iter() {
5543            matching_paths_tx
5544                .send(SearchMatchCandidate::OpenBuffer {
5545                    buffer: buffer.clone(),
5546                    path: Some(path.clone()),
5547                })
5548                .await
5549                .log_err();
5550        }
5551        background
5552            .scoped(|scope| {
5553                for worker_ix in 0..workers {
5554                    let worker_start_ix = worker_ix * paths_per_worker;
5555                    let worker_end_ix = worker_start_ix + paths_per_worker;
5556                    let unnamed_buffers = opened_buffers.clone();
5557                    scope.spawn(async move {
5558                        let mut snapshot_start_ix = 0;
5559                        let mut abs_path = PathBuf::new();
5560                        for snapshot in snapshots {
5561                            let snapshot_end_ix = snapshot_start_ix + snapshot.visible_file_count();
5562                            if worker_end_ix <= snapshot_start_ix {
5563                                break;
5564                            } else if worker_start_ix > snapshot_end_ix {
5565                                snapshot_start_ix = snapshot_end_ix;
5566                                continue;
5567                            } else {
5568                                let start_in_snapshot =
5569                                    worker_start_ix.saturating_sub(snapshot_start_ix);
5570                                let end_in_snapshot =
5571                                    cmp::min(worker_end_ix, snapshot_end_ix) - snapshot_start_ix;
5572
5573                                for entry in snapshot
5574                                    .files(false, start_in_snapshot)
5575                                    .take(end_in_snapshot - start_in_snapshot)
5576                                {
5577                                    if matching_paths_tx.is_closed() {
5578                                        break;
5579                                    }
5580                                    if unnamed_buffers.contains_key(&entry.path) {
5581                                        continue;
5582                                    }
5583                                    let matches = if query.file_matches(Some(&entry.path)) {
5584                                        abs_path.clear();
5585                                        abs_path.push(&snapshot.abs_path());
5586                                        abs_path.push(&entry.path);
5587                                        if let Some(file) = fs.open_sync(&abs_path).await.log_err()
5588                                        {
5589                                            query.detect(file).unwrap_or(false)
5590                                        } else {
5591                                            false
5592                                        }
5593                                    } else {
5594                                        false
5595                                    };
5596
5597                                    if matches {
5598                                        let project_path = SearchMatchCandidate::Path {
5599                                            worktree_id: snapshot.id(),
5600                                            path: entry.path.clone(),
5601                                        };
5602                                        if matching_paths_tx.send(project_path).await.is_err() {
5603                                            break;
5604                                        }
5605                                    }
5606                                }
5607
5608                                snapshot_start_ix = snapshot_end_ix;
5609                            }
5610                        }
5611                    });
5612                }
5613            })
5614            .await;
5615    }
5616
5617    fn request_lsp<R: LspCommand>(
5618        &self,
5619        buffer_handle: ModelHandle<Buffer>,
5620        server: LanguageServerToQuery,
5621        request: R,
5622        cx: &mut ModelContext<Self>,
5623    ) -> Task<Result<R::Response>>
5624    where
5625        <R::LspRequest as lsp::request::Request>::Result: Send,
5626    {
5627        let buffer = buffer_handle.read(cx);
5628        if self.is_local() {
5629            let language_server = match server {
5630                LanguageServerToQuery::Primary => {
5631                    match self.primary_language_server_for_buffer(buffer, cx) {
5632                        Some((_, server)) => Some(Arc::clone(server)),
5633                        None => return Task::ready(Ok(Default::default())),
5634                    }
5635                }
5636                LanguageServerToQuery::Other(id) => self
5637                    .language_server_for_buffer(buffer, id, cx)
5638                    .map(|(_, server)| Arc::clone(server)),
5639            };
5640            let file = File::from_dyn(buffer.file()).and_then(File::as_local);
5641            if let (Some(file), Some(language_server)) = (file, language_server) {
5642                let lsp_params = request.to_lsp(&file.abs_path(cx), buffer, &language_server, cx);
5643                return cx.spawn(|this, cx| async move {
5644                    if !request.check_capabilities(language_server.capabilities()) {
5645                        return Ok(Default::default());
5646                    }
5647
5648                    let result = language_server.request::<R::LspRequest>(lsp_params).await;
5649                    let response = match result {
5650                        Ok(response) => response,
5651
5652                        Err(err) => {
5653                            log::warn!(
5654                                "Generic lsp request to {} failed: {}",
5655                                language_server.name(),
5656                                err
5657                            );
5658                            return Err(err);
5659                        }
5660                    };
5661
5662                    request
5663                        .response_from_lsp(
5664                            response,
5665                            this,
5666                            buffer_handle,
5667                            language_server.server_id(),
5668                            cx,
5669                        )
5670                        .await
5671                });
5672            }
5673        } else if let Some(project_id) = self.remote_id() {
5674            return self.send_lsp_proto_request(buffer_handle, project_id, request, cx);
5675        }
5676
5677        Task::ready(Ok(Default::default()))
5678    }
5679
5680    fn send_lsp_proto_request<R: LspCommand>(
5681        &self,
5682        buffer: ModelHandle<Buffer>,
5683        project_id: u64,
5684        request: R,
5685        cx: &mut ModelContext<'_, Project>,
5686    ) -> Task<anyhow::Result<<R as LspCommand>::Response>> {
5687        let rpc = self.client.clone();
5688        let message = request.to_proto(project_id, buffer.read(cx));
5689        cx.spawn_weak(|this, cx| async move {
5690            // Ensure the project is still alive by the time the task
5691            // is scheduled.
5692            this.upgrade(&cx)
5693                .ok_or_else(|| anyhow!("project dropped"))?;
5694            let response = rpc.request(message).await?;
5695            let this = this
5696                .upgrade(&cx)
5697                .ok_or_else(|| anyhow!("project dropped"))?;
5698            if this.read_with(&cx, |this, _| this.is_read_only()) {
5699                Err(anyhow!("disconnected before completing request"))
5700            } else {
5701                request
5702                    .response_from_proto(response, this, buffer, cx)
5703                    .await
5704            }
5705        })
5706    }
5707
5708    fn sort_candidates_and_open_buffers(
5709        mut matching_paths_rx: Receiver<SearchMatchCandidate>,
5710        cx: &mut ModelContext<Self>,
5711    ) -> (
5712        futures::channel::oneshot::Receiver<Vec<SearchMatchCandidate>>,
5713        Receiver<(
5714            Option<(ModelHandle<Buffer>, BufferSnapshot)>,
5715            SearchMatchCandidateIndex,
5716        )>,
5717    ) {
5718        let (buffers_tx, buffers_rx) = smol::channel::bounded(1024);
5719        let (sorted_buffers_tx, sorted_buffers_rx) = futures::channel::oneshot::channel();
5720        cx.spawn(|this, cx| async move {
5721            let mut buffers = vec![];
5722            while let Some(entry) = matching_paths_rx.next().await {
5723                buffers.push(entry);
5724            }
5725            buffers.sort_by_key(|candidate| candidate.path());
5726            let matching_paths = buffers.clone();
5727            let _ = sorted_buffers_tx.send(buffers);
5728            for (index, candidate) in matching_paths.into_iter().enumerate() {
5729                if buffers_tx.is_closed() {
5730                    break;
5731                }
5732                let this = this.clone();
5733                let buffers_tx = buffers_tx.clone();
5734                cx.spawn(|mut cx| async move {
5735                    let buffer = match candidate {
5736                        SearchMatchCandidate::OpenBuffer { buffer, .. } => Some(buffer),
5737                        SearchMatchCandidate::Path { worktree_id, path } => this
5738                            .update(&mut cx, |this, cx| {
5739                                this.open_buffer((worktree_id, path), cx)
5740                            })
5741                            .await
5742                            .log_err(),
5743                    };
5744                    if let Some(buffer) = buffer {
5745                        let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot());
5746                        buffers_tx
5747                            .send((Some((buffer, snapshot)), index))
5748                            .await
5749                            .log_err();
5750                    } else {
5751                        buffers_tx.send((None, index)).await.log_err();
5752                    }
5753
5754                    Ok::<_, anyhow::Error>(())
5755                })
5756                .detach();
5757            }
5758        })
5759        .detach();
5760        (sorted_buffers_rx, buffers_rx)
5761    }
5762
5763    pub fn find_or_create_local_worktree(
5764        &mut self,
5765        abs_path: impl AsRef<Path>,
5766        visible: bool,
5767        cx: &mut ModelContext<Self>,
5768    ) -> Task<Result<(ModelHandle<Worktree>, PathBuf)>> {
5769        let abs_path = abs_path.as_ref();
5770        if let Some((tree, relative_path)) = self.find_local_worktree(abs_path, cx) {
5771            Task::ready(Ok((tree, relative_path)))
5772        } else {
5773            let worktree = self.create_local_worktree(abs_path, visible, cx);
5774            cx.foreground()
5775                .spawn(async move { Ok((worktree.await?, PathBuf::new())) })
5776        }
5777    }
5778
5779    pub fn find_local_worktree(
5780        &self,
5781        abs_path: &Path,
5782        cx: &AppContext,
5783    ) -> Option<(ModelHandle<Worktree>, PathBuf)> {
5784        for tree in &self.worktrees {
5785            if let Some(tree) = tree.upgrade(cx) {
5786                if let Some(relative_path) = tree
5787                    .read(cx)
5788                    .as_local()
5789                    .and_then(|t| abs_path.strip_prefix(t.abs_path()).ok())
5790                {
5791                    return Some((tree.clone(), relative_path.into()));
5792                }
5793            }
5794        }
5795        None
5796    }
5797
5798    pub fn is_shared(&self) -> bool {
5799        match &self.client_state {
5800            Some(ProjectClientState::Local { .. }) => true,
5801            _ => false,
5802        }
5803    }
5804
5805    fn create_local_worktree(
5806        &mut self,
5807        abs_path: impl AsRef<Path>,
5808        visible: bool,
5809        cx: &mut ModelContext<Self>,
5810    ) -> Task<Result<ModelHandle<Worktree>>> {
5811        let fs = self.fs.clone();
5812        let client = self.client.clone();
5813        let next_entry_id = self.next_entry_id.clone();
5814        let path: Arc<Path> = abs_path.as_ref().into();
5815        let task = self
5816            .loading_local_worktrees
5817            .entry(path.clone())
5818            .or_insert_with(|| {
5819                cx.spawn(|project, mut cx| {
5820                    async move {
5821                        let worktree = Worktree::local(
5822                            client.clone(),
5823                            path.clone(),
5824                            visible,
5825                            fs,
5826                            next_entry_id,
5827                            &mut cx,
5828                        )
5829                        .await;
5830
5831                        project.update(&mut cx, |project, _| {
5832                            project.loading_local_worktrees.remove(&path);
5833                        });
5834
5835                        let worktree = worktree?;
5836                        project.update(&mut cx, |project, cx| project.add_worktree(&worktree, cx));
5837                        Ok(worktree)
5838                    }
5839                    .map_err(Arc::new)
5840                })
5841                .shared()
5842            })
5843            .clone();
5844        cx.foreground().spawn(async move {
5845            match task.await {
5846                Ok(worktree) => Ok(worktree),
5847                Err(err) => Err(anyhow!("{}", err)),
5848            }
5849        })
5850    }
5851
5852    pub fn remove_worktree(&mut self, id_to_remove: WorktreeId, cx: &mut ModelContext<Self>) {
5853        self.worktrees.retain(|worktree| {
5854            if let Some(worktree) = worktree.upgrade(cx) {
5855                let id = worktree.read(cx).id();
5856                if id == id_to_remove {
5857                    cx.emit(Event::WorktreeRemoved(id));
5858                    false
5859                } else {
5860                    true
5861                }
5862            } else {
5863                false
5864            }
5865        });
5866        self.metadata_changed(cx);
5867    }
5868
5869    fn add_worktree(&mut self, worktree: &ModelHandle<Worktree>, cx: &mut ModelContext<Self>) {
5870        cx.observe(worktree, |_, _, cx| cx.notify()).detach();
5871        if worktree.read(cx).is_local() {
5872            cx.subscribe(worktree, |this, worktree, event, cx| match event {
5873                worktree::Event::UpdatedEntries(changes) => {
5874                    this.update_local_worktree_buffers(&worktree, changes, cx);
5875                    this.update_local_worktree_language_servers(&worktree, changes, cx);
5876                    this.update_local_worktree_settings(&worktree, changes, cx);
5877                    cx.emit(Event::WorktreeUpdatedEntries(
5878                        worktree.read(cx).id(),
5879                        changes.clone(),
5880                    ));
5881                }
5882                worktree::Event::UpdatedGitRepositories(updated_repos) => {
5883                    this.update_local_worktree_buffers_git_repos(worktree, updated_repos, cx)
5884                }
5885            })
5886            .detach();
5887        }
5888
5889        let push_strong_handle = {
5890            let worktree = worktree.read(cx);
5891            self.is_shared() || worktree.is_visible() || worktree.is_remote()
5892        };
5893        if push_strong_handle {
5894            self.worktrees
5895                .push(WorktreeHandle::Strong(worktree.clone()));
5896        } else {
5897            self.worktrees
5898                .push(WorktreeHandle::Weak(worktree.downgrade()));
5899        }
5900
5901        let handle_id = worktree.id();
5902        cx.observe_release(worktree, move |this, worktree, cx| {
5903            let _ = this.remove_worktree(worktree.id(), cx);
5904            cx.update_global::<SettingsStore, _, _>(|store, cx| {
5905                store.clear_local_settings(handle_id, cx).log_err()
5906            });
5907        })
5908        .detach();
5909
5910        cx.emit(Event::WorktreeAdded);
5911        self.metadata_changed(cx);
5912    }
5913
5914    fn update_local_worktree_buffers(
5915        &mut self,
5916        worktree_handle: &ModelHandle<Worktree>,
5917        changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
5918        cx: &mut ModelContext<Self>,
5919    ) {
5920        let snapshot = worktree_handle.read(cx).snapshot();
5921
5922        let mut renamed_buffers = Vec::new();
5923        for (path, entry_id, _) in changes {
5924            let worktree_id = worktree_handle.read(cx).id();
5925            let project_path = ProjectPath {
5926                worktree_id,
5927                path: path.clone(),
5928            };
5929
5930            let buffer_id = match self.local_buffer_ids_by_entry_id.get(entry_id) {
5931                Some(&buffer_id) => buffer_id,
5932                None => match self.local_buffer_ids_by_path.get(&project_path) {
5933                    Some(&buffer_id) => buffer_id,
5934                    None => {
5935                        continue;
5936                    }
5937                },
5938            };
5939
5940            let open_buffer = self.opened_buffers.get(&buffer_id);
5941            let buffer = if let Some(buffer) = open_buffer.and_then(|buffer| buffer.upgrade(cx)) {
5942                buffer
5943            } else {
5944                self.opened_buffers.remove(&buffer_id);
5945                self.local_buffer_ids_by_path.remove(&project_path);
5946                self.local_buffer_ids_by_entry_id.remove(entry_id);
5947                continue;
5948            };
5949
5950            buffer.update(cx, |buffer, cx| {
5951                if let Some(old_file) = File::from_dyn(buffer.file()) {
5952                    if old_file.worktree != *worktree_handle {
5953                        return;
5954                    }
5955
5956                    let new_file = if let Some(entry) = snapshot.entry_for_id(old_file.entry_id) {
5957                        File {
5958                            is_local: true,
5959                            entry_id: entry.id,
5960                            mtime: entry.mtime,
5961                            path: entry.path.clone(),
5962                            worktree: worktree_handle.clone(),
5963                            is_deleted: false,
5964                        }
5965                    } else if let Some(entry) = snapshot.entry_for_path(old_file.path().as_ref()) {
5966                        File {
5967                            is_local: true,
5968                            entry_id: entry.id,
5969                            mtime: entry.mtime,
5970                            path: entry.path.clone(),
5971                            worktree: worktree_handle.clone(),
5972                            is_deleted: false,
5973                        }
5974                    } else {
5975                        File {
5976                            is_local: true,
5977                            entry_id: old_file.entry_id,
5978                            path: old_file.path().clone(),
5979                            mtime: old_file.mtime(),
5980                            worktree: worktree_handle.clone(),
5981                            is_deleted: true,
5982                        }
5983                    };
5984
5985                    let old_path = old_file.abs_path(cx);
5986                    if new_file.abs_path(cx) != old_path {
5987                        renamed_buffers.push((cx.handle(), old_file.clone()));
5988                        self.local_buffer_ids_by_path.remove(&project_path);
5989                        self.local_buffer_ids_by_path.insert(
5990                            ProjectPath {
5991                                worktree_id,
5992                                path: path.clone(),
5993                            },
5994                            buffer_id,
5995                        );
5996                    }
5997
5998                    if new_file.entry_id != *entry_id {
5999                        self.local_buffer_ids_by_entry_id.remove(entry_id);
6000                        self.local_buffer_ids_by_entry_id
6001                            .insert(new_file.entry_id, buffer_id);
6002                    }
6003
6004                    if new_file != *old_file {
6005                        if let Some(project_id) = self.remote_id() {
6006                            self.client
6007                                .send(proto::UpdateBufferFile {
6008                                    project_id,
6009                                    buffer_id: buffer_id as u64,
6010                                    file: Some(new_file.to_proto()),
6011                                })
6012                                .log_err();
6013                        }
6014
6015                        buffer.file_updated(Arc::new(new_file), cx).detach();
6016                    }
6017                }
6018            });
6019        }
6020
6021        for (buffer, old_file) in renamed_buffers {
6022            self.unregister_buffer_from_language_servers(&buffer, &old_file, cx);
6023            self.detect_language_for_buffer(&buffer, cx);
6024            self.register_buffer_with_language_servers(&buffer, cx);
6025        }
6026    }
6027
6028    fn update_local_worktree_language_servers(
6029        &mut self,
6030        worktree_handle: &ModelHandle<Worktree>,
6031        changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
6032        cx: &mut ModelContext<Self>,
6033    ) {
6034        if changes.is_empty() {
6035            return;
6036        }
6037
6038        let worktree_id = worktree_handle.read(cx).id();
6039        let mut language_server_ids = self
6040            .language_server_ids
6041            .iter()
6042            .filter_map(|((server_worktree_id, _), server_id)| {
6043                (*server_worktree_id == worktree_id).then_some(*server_id)
6044            })
6045            .collect::<Vec<_>>();
6046        language_server_ids.sort();
6047        language_server_ids.dedup();
6048
6049        let abs_path = worktree_handle.read(cx).abs_path();
6050        for server_id in &language_server_ids {
6051            if let Some(LanguageServerState::Running {
6052                server,
6053                watched_paths,
6054                ..
6055            }) = self.language_servers.get(server_id)
6056            {
6057                if let Some(watched_paths) = watched_paths.get(&worktree_id) {
6058                    let params = lsp::DidChangeWatchedFilesParams {
6059                        changes: changes
6060                            .iter()
6061                            .filter_map(|(path, _, change)| {
6062                                if !watched_paths.is_match(&path) {
6063                                    return None;
6064                                }
6065                                let typ = match change {
6066                                    PathChange::Loaded => return None,
6067                                    PathChange::Added => lsp::FileChangeType::CREATED,
6068                                    PathChange::Removed => lsp::FileChangeType::DELETED,
6069                                    PathChange::Updated => lsp::FileChangeType::CHANGED,
6070                                    PathChange::AddedOrUpdated => lsp::FileChangeType::CHANGED,
6071                                };
6072                                Some(lsp::FileEvent {
6073                                    uri: lsp::Url::from_file_path(abs_path.join(path)).unwrap(),
6074                                    typ,
6075                                })
6076                            })
6077                            .collect(),
6078                    };
6079
6080                    if !params.changes.is_empty() {
6081                        server
6082                            .notify::<lsp::notification::DidChangeWatchedFiles>(params)
6083                            .log_err();
6084                    }
6085                }
6086            }
6087        }
6088    }
6089
6090    fn update_local_worktree_buffers_git_repos(
6091        &mut self,
6092        worktree_handle: ModelHandle<Worktree>,
6093        changed_repos: &UpdatedGitRepositoriesSet,
6094        cx: &mut ModelContext<Self>,
6095    ) {
6096        debug_assert!(worktree_handle.read(cx).is_local());
6097
6098        // Identify the loading buffers whose containing repository that has changed.
6099        let future_buffers = self
6100            .loading_buffers_by_path
6101            .iter()
6102            .filter_map(|(project_path, receiver)| {
6103                if project_path.worktree_id != worktree_handle.read(cx).id() {
6104                    return None;
6105                }
6106                let path = &project_path.path;
6107                changed_repos
6108                    .iter()
6109                    .find(|(work_dir, _)| path.starts_with(work_dir))?;
6110                let receiver = receiver.clone();
6111                let path = path.clone();
6112                Some(async move {
6113                    wait_for_loading_buffer(receiver)
6114                        .await
6115                        .ok()
6116                        .map(|buffer| (buffer, path))
6117                })
6118            })
6119            .collect::<FuturesUnordered<_>>();
6120
6121        // Identify the current buffers whose containing repository has changed.
6122        let current_buffers = self
6123            .opened_buffers
6124            .values()
6125            .filter_map(|buffer| {
6126                let buffer = buffer.upgrade(cx)?;
6127                let file = File::from_dyn(buffer.read(cx).file())?;
6128                if file.worktree != worktree_handle {
6129                    return None;
6130                }
6131                let path = file.path();
6132                changed_repos
6133                    .iter()
6134                    .find(|(work_dir, _)| path.starts_with(work_dir))?;
6135                Some((buffer, path.clone()))
6136            })
6137            .collect::<Vec<_>>();
6138
6139        if future_buffers.len() + current_buffers.len() == 0 {
6140            return;
6141        }
6142
6143        let remote_id = self.remote_id();
6144        let client = self.client.clone();
6145        cx.spawn_weak(move |_, mut cx| async move {
6146            // Wait for all of the buffers to load.
6147            let future_buffers = future_buffers.collect::<Vec<_>>().await;
6148
6149            // Reload the diff base for every buffer whose containing git repository has changed.
6150            let snapshot =
6151                worktree_handle.read_with(&cx, |tree, _| tree.as_local().unwrap().snapshot());
6152            let diff_bases_by_buffer = cx
6153                .background()
6154                .spawn(async move {
6155                    future_buffers
6156                        .into_iter()
6157                        .filter_map(|e| e)
6158                        .chain(current_buffers)
6159                        .filter_map(|(buffer, path)| {
6160                            let (work_directory, repo) =
6161                                snapshot.repository_and_work_directory_for_path(&path)?;
6162                            let repo = snapshot.get_local_repo(&repo)?;
6163                            let relative_path = path.strip_prefix(&work_directory).ok()?;
6164                            let base_text = repo.repo_ptr.lock().load_index_text(&relative_path);
6165                            Some((buffer, base_text))
6166                        })
6167                        .collect::<Vec<_>>()
6168                })
6169                .await;
6170
6171            // Assign the new diff bases on all of the buffers.
6172            for (buffer, diff_base) in diff_bases_by_buffer {
6173                let buffer_id = buffer.update(&mut cx, |buffer, cx| {
6174                    buffer.set_diff_base(diff_base.clone(), cx);
6175                    buffer.remote_id()
6176                });
6177                if let Some(project_id) = remote_id {
6178                    client
6179                        .send(proto::UpdateDiffBase {
6180                            project_id,
6181                            buffer_id,
6182                            diff_base,
6183                        })
6184                        .log_err();
6185                }
6186            }
6187        })
6188        .detach();
6189    }
6190
6191    fn update_local_worktree_settings(
6192        &mut self,
6193        worktree: &ModelHandle<Worktree>,
6194        changes: &UpdatedEntriesSet,
6195        cx: &mut ModelContext<Self>,
6196    ) {
6197        let project_id = self.remote_id();
6198        let worktree_id = worktree.id();
6199        let worktree = worktree.read(cx).as_local().unwrap();
6200        let remote_worktree_id = worktree.id();
6201
6202        let mut settings_contents = Vec::new();
6203        for (path, _, change) in changes.iter() {
6204            if path.ends_with(&*LOCAL_SETTINGS_RELATIVE_PATH) {
6205                let settings_dir = Arc::from(
6206                    path.ancestors()
6207                        .nth(LOCAL_SETTINGS_RELATIVE_PATH.components().count())
6208                        .unwrap(),
6209                );
6210                let fs = self.fs.clone();
6211                let removed = *change == PathChange::Removed;
6212                let abs_path = worktree.absolutize(path);
6213                settings_contents.push(async move {
6214                    (settings_dir, (!removed).then_some(fs.load(&abs_path).await))
6215                });
6216            }
6217        }
6218
6219        if settings_contents.is_empty() {
6220            return;
6221        }
6222
6223        let client = self.client.clone();
6224        cx.spawn_weak(move |_, mut cx| async move {
6225            let settings_contents: Vec<(Arc<Path>, _)> =
6226                futures::future::join_all(settings_contents).await;
6227            cx.update(|cx| {
6228                cx.update_global::<SettingsStore, _, _>(|store, cx| {
6229                    for (directory, file_content) in settings_contents {
6230                        let file_content = file_content.and_then(|content| content.log_err());
6231                        store
6232                            .set_local_settings(
6233                                worktree_id,
6234                                directory.clone(),
6235                                file_content.as_ref().map(String::as_str),
6236                                cx,
6237                            )
6238                            .log_err();
6239                        if let Some(remote_id) = project_id {
6240                            client
6241                                .send(proto::UpdateWorktreeSettings {
6242                                    project_id: remote_id,
6243                                    worktree_id: remote_worktree_id.to_proto(),
6244                                    path: directory.to_string_lossy().into_owned(),
6245                                    content: file_content,
6246                                })
6247                                .log_err();
6248                        }
6249                    }
6250                });
6251            });
6252        })
6253        .detach();
6254    }
6255
6256    pub fn set_active_path(&mut self, entry: Option<ProjectPath>, cx: &mut ModelContext<Self>) {
6257        let new_active_entry = entry.and_then(|project_path| {
6258            let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
6259            let entry = worktree.read(cx).entry_for_path(project_path.path)?;
6260            Some(entry.id)
6261        });
6262        if new_active_entry != self.active_entry {
6263            self.active_entry = new_active_entry;
6264            cx.emit(Event::ActiveEntryChanged(new_active_entry));
6265        }
6266    }
6267
6268    pub fn language_servers_running_disk_based_diagnostics(
6269        &self,
6270    ) -> impl Iterator<Item = LanguageServerId> + '_ {
6271        self.language_server_statuses
6272            .iter()
6273            .filter_map(|(id, status)| {
6274                if status.has_pending_diagnostic_updates {
6275                    Some(*id)
6276                } else {
6277                    None
6278                }
6279            })
6280    }
6281
6282    pub fn diagnostic_summary(&self, cx: &AppContext) -> DiagnosticSummary {
6283        let mut summary = DiagnosticSummary::default();
6284        for (_, _, path_summary) in self.diagnostic_summaries(cx) {
6285            summary.error_count += path_summary.error_count;
6286            summary.warning_count += path_summary.warning_count;
6287        }
6288        summary
6289    }
6290
6291    pub fn diagnostic_summaries<'a>(
6292        &'a self,
6293        cx: &'a AppContext,
6294    ) -> impl Iterator<Item = (ProjectPath, LanguageServerId, DiagnosticSummary)> + 'a {
6295        self.visible_worktrees(cx).flat_map(move |worktree| {
6296            let worktree = worktree.read(cx);
6297            let worktree_id = worktree.id();
6298            worktree
6299                .diagnostic_summaries()
6300                .map(move |(path, server_id, summary)| {
6301                    (ProjectPath { worktree_id, path }, server_id, summary)
6302                })
6303        })
6304    }
6305
6306    pub fn disk_based_diagnostics_started(
6307        &mut self,
6308        language_server_id: LanguageServerId,
6309        cx: &mut ModelContext<Self>,
6310    ) {
6311        cx.emit(Event::DiskBasedDiagnosticsStarted { language_server_id });
6312    }
6313
6314    pub fn disk_based_diagnostics_finished(
6315        &mut self,
6316        language_server_id: LanguageServerId,
6317        cx: &mut ModelContext<Self>,
6318    ) {
6319        cx.emit(Event::DiskBasedDiagnosticsFinished { language_server_id });
6320    }
6321
6322    pub fn active_entry(&self) -> Option<ProjectEntryId> {
6323        self.active_entry
6324    }
6325
6326    pub fn entry_for_path(&self, path: &ProjectPath, cx: &AppContext) -> Option<Entry> {
6327        self.worktree_for_id(path.worktree_id, cx)?
6328            .read(cx)
6329            .entry_for_path(&path.path)
6330            .cloned()
6331    }
6332
6333    pub fn path_for_entry(&self, entry_id: ProjectEntryId, cx: &AppContext) -> Option<ProjectPath> {
6334        let worktree = self.worktree_for_entry(entry_id, cx)?;
6335        let worktree = worktree.read(cx);
6336        let worktree_id = worktree.id();
6337        let path = worktree.entry_for_id(entry_id)?.path.clone();
6338        Some(ProjectPath { worktree_id, path })
6339    }
6340
6341    pub fn absolute_path(&self, project_path: &ProjectPath, cx: &AppContext) -> Option<PathBuf> {
6342        let workspace_root = self
6343            .worktree_for_id(project_path.worktree_id, cx)?
6344            .read(cx)
6345            .abs_path();
6346        let project_path = project_path.path.as_ref();
6347
6348        Some(if project_path == Path::new("") {
6349            workspace_root.to_path_buf()
6350        } else {
6351            workspace_root.join(project_path)
6352        })
6353    }
6354
6355    // RPC message handlers
6356
6357    async fn handle_unshare_project(
6358        this: ModelHandle<Self>,
6359        _: TypedEnvelope<proto::UnshareProject>,
6360        _: Arc<Client>,
6361        mut cx: AsyncAppContext,
6362    ) -> Result<()> {
6363        this.update(&mut cx, |this, cx| {
6364            if this.is_local() {
6365                this.unshare(cx)?;
6366            } else {
6367                this.disconnected_from_host(cx);
6368            }
6369            Ok(())
6370        })
6371    }
6372
6373    async fn handle_add_collaborator(
6374        this: ModelHandle<Self>,
6375        mut envelope: TypedEnvelope<proto::AddProjectCollaborator>,
6376        _: Arc<Client>,
6377        mut cx: AsyncAppContext,
6378    ) -> Result<()> {
6379        let collaborator = envelope
6380            .payload
6381            .collaborator
6382            .take()
6383            .ok_or_else(|| anyhow!("empty collaborator"))?;
6384
6385        let collaborator = Collaborator::from_proto(collaborator)?;
6386        this.update(&mut cx, |this, cx| {
6387            this.shared_buffers.remove(&collaborator.peer_id);
6388            cx.emit(Event::CollaboratorJoined(collaborator.peer_id));
6389            this.collaborators
6390                .insert(collaborator.peer_id, collaborator);
6391            cx.notify();
6392        });
6393
6394        Ok(())
6395    }
6396
6397    async fn handle_update_project_collaborator(
6398        this: ModelHandle<Self>,
6399        envelope: TypedEnvelope<proto::UpdateProjectCollaborator>,
6400        _: Arc<Client>,
6401        mut cx: AsyncAppContext,
6402    ) -> Result<()> {
6403        let old_peer_id = envelope
6404            .payload
6405            .old_peer_id
6406            .ok_or_else(|| anyhow!("missing old peer id"))?;
6407        let new_peer_id = envelope
6408            .payload
6409            .new_peer_id
6410            .ok_or_else(|| anyhow!("missing new peer id"))?;
6411        this.update(&mut cx, |this, cx| {
6412            let collaborator = this
6413                .collaborators
6414                .remove(&old_peer_id)
6415                .ok_or_else(|| anyhow!("received UpdateProjectCollaborator for unknown peer"))?;
6416            let is_host = collaborator.replica_id == 0;
6417            this.collaborators.insert(new_peer_id, collaborator);
6418
6419            let buffers = this.shared_buffers.remove(&old_peer_id);
6420            log::info!(
6421                "peer {} became {}. moving buffers {:?}",
6422                old_peer_id,
6423                new_peer_id,
6424                &buffers
6425            );
6426            if let Some(buffers) = buffers {
6427                this.shared_buffers.insert(new_peer_id, buffers);
6428            }
6429
6430            if is_host {
6431                this.opened_buffers
6432                    .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
6433                this.buffer_ordered_messages_tx
6434                    .unbounded_send(BufferOrderedMessage::Resync)
6435                    .unwrap();
6436            }
6437
6438            cx.emit(Event::CollaboratorUpdated {
6439                old_peer_id,
6440                new_peer_id,
6441            });
6442            cx.notify();
6443            Ok(())
6444        })
6445    }
6446
6447    async fn handle_remove_collaborator(
6448        this: ModelHandle<Self>,
6449        envelope: TypedEnvelope<proto::RemoveProjectCollaborator>,
6450        _: Arc<Client>,
6451        mut cx: AsyncAppContext,
6452    ) -> Result<()> {
6453        this.update(&mut cx, |this, cx| {
6454            let peer_id = envelope
6455                .payload
6456                .peer_id
6457                .ok_or_else(|| anyhow!("invalid peer id"))?;
6458            let replica_id = this
6459                .collaborators
6460                .remove(&peer_id)
6461                .ok_or_else(|| anyhow!("unknown peer {:?}", peer_id))?
6462                .replica_id;
6463            for buffer in this.opened_buffers.values() {
6464                if let Some(buffer) = buffer.upgrade(cx) {
6465                    buffer.update(cx, |buffer, cx| buffer.remove_peer(replica_id, cx));
6466                }
6467            }
6468            this.shared_buffers.remove(&peer_id);
6469
6470            cx.emit(Event::CollaboratorLeft(peer_id));
6471            cx.notify();
6472            Ok(())
6473        })
6474    }
6475
6476    async fn handle_update_project(
6477        this: ModelHandle<Self>,
6478        envelope: TypedEnvelope<proto::UpdateProject>,
6479        _: Arc<Client>,
6480        mut cx: AsyncAppContext,
6481    ) -> Result<()> {
6482        this.update(&mut cx, |this, cx| {
6483            // Don't handle messages that were sent before the response to us joining the project
6484            if envelope.message_id > this.join_project_response_message_id {
6485                this.set_worktrees_from_proto(envelope.payload.worktrees, cx)?;
6486            }
6487            Ok(())
6488        })
6489    }
6490
6491    async fn handle_update_worktree(
6492        this: ModelHandle<Self>,
6493        envelope: TypedEnvelope<proto::UpdateWorktree>,
6494        _: Arc<Client>,
6495        mut cx: AsyncAppContext,
6496    ) -> Result<()> {
6497        this.update(&mut cx, |this, cx| {
6498            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6499            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
6500                worktree.update(cx, |worktree, _| {
6501                    let worktree = worktree.as_remote_mut().unwrap();
6502                    worktree.update_from_remote(envelope.payload);
6503                });
6504            }
6505            Ok(())
6506        })
6507    }
6508
6509    async fn handle_update_worktree_settings(
6510        this: ModelHandle<Self>,
6511        envelope: TypedEnvelope<proto::UpdateWorktreeSettings>,
6512        _: Arc<Client>,
6513        mut cx: AsyncAppContext,
6514    ) -> Result<()> {
6515        this.update(&mut cx, |this, cx| {
6516            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6517            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
6518                cx.update_global::<SettingsStore, _, _>(|store, cx| {
6519                    store
6520                        .set_local_settings(
6521                            worktree.id(),
6522                            PathBuf::from(&envelope.payload.path).into(),
6523                            envelope.payload.content.as_ref().map(String::as_str),
6524                            cx,
6525                        )
6526                        .log_err();
6527                });
6528            }
6529            Ok(())
6530        })
6531    }
6532
6533    async fn handle_create_project_entry(
6534        this: ModelHandle<Self>,
6535        envelope: TypedEnvelope<proto::CreateProjectEntry>,
6536        _: Arc<Client>,
6537        mut cx: AsyncAppContext,
6538    ) -> Result<proto::ProjectEntryResponse> {
6539        let worktree = this.update(&mut cx, |this, cx| {
6540            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6541            this.worktree_for_id(worktree_id, cx)
6542                .ok_or_else(|| anyhow!("worktree not found"))
6543        })?;
6544        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
6545        let entry = worktree
6546            .update(&mut cx, |worktree, cx| {
6547                let worktree = worktree.as_local_mut().unwrap();
6548                let path = PathBuf::from(envelope.payload.path);
6549                worktree.create_entry(path, envelope.payload.is_directory, cx)
6550            })
6551            .await?;
6552        Ok(proto::ProjectEntryResponse {
6553            entry: Some((&entry).into()),
6554            worktree_scan_id: worktree_scan_id as u64,
6555        })
6556    }
6557
6558    async fn handle_rename_project_entry(
6559        this: ModelHandle<Self>,
6560        envelope: TypedEnvelope<proto::RenameProjectEntry>,
6561        _: Arc<Client>,
6562        mut cx: AsyncAppContext,
6563    ) -> Result<proto::ProjectEntryResponse> {
6564        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6565        let worktree = this.read_with(&cx, |this, cx| {
6566            this.worktree_for_entry(entry_id, cx)
6567                .ok_or_else(|| anyhow!("worktree not found"))
6568        })?;
6569        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
6570        let entry = worktree
6571            .update(&mut cx, |worktree, cx| {
6572                let new_path = PathBuf::from(envelope.payload.new_path);
6573                worktree
6574                    .as_local_mut()
6575                    .unwrap()
6576                    .rename_entry(entry_id, new_path, cx)
6577                    .ok_or_else(|| anyhow!("invalid entry"))
6578            })?
6579            .await?;
6580        Ok(proto::ProjectEntryResponse {
6581            entry: Some((&entry).into()),
6582            worktree_scan_id: worktree_scan_id as u64,
6583        })
6584    }
6585
6586    async fn handle_copy_project_entry(
6587        this: ModelHandle<Self>,
6588        envelope: TypedEnvelope<proto::CopyProjectEntry>,
6589        _: Arc<Client>,
6590        mut cx: AsyncAppContext,
6591    ) -> Result<proto::ProjectEntryResponse> {
6592        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6593        let worktree = this.read_with(&cx, |this, cx| {
6594            this.worktree_for_entry(entry_id, cx)
6595                .ok_or_else(|| anyhow!("worktree not found"))
6596        })?;
6597        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
6598        let entry = worktree
6599            .update(&mut cx, |worktree, cx| {
6600                let new_path = PathBuf::from(envelope.payload.new_path);
6601                worktree
6602                    .as_local_mut()
6603                    .unwrap()
6604                    .copy_entry(entry_id, new_path, cx)
6605                    .ok_or_else(|| anyhow!("invalid entry"))
6606            })?
6607            .await?;
6608        Ok(proto::ProjectEntryResponse {
6609            entry: Some((&entry).into()),
6610            worktree_scan_id: worktree_scan_id as u64,
6611        })
6612    }
6613
6614    async fn handle_delete_project_entry(
6615        this: ModelHandle<Self>,
6616        envelope: TypedEnvelope<proto::DeleteProjectEntry>,
6617        _: Arc<Client>,
6618        mut cx: AsyncAppContext,
6619    ) -> Result<proto::ProjectEntryResponse> {
6620        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6621
6622        this.update(&mut cx, |_, cx| cx.emit(Event::DeletedEntry(entry_id)));
6623
6624        let worktree = this.read_with(&cx, |this, cx| {
6625            this.worktree_for_entry(entry_id, cx)
6626                .ok_or_else(|| anyhow!("worktree not found"))
6627        })?;
6628        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id());
6629        worktree
6630            .update(&mut cx, |worktree, cx| {
6631                worktree
6632                    .as_local_mut()
6633                    .unwrap()
6634                    .delete_entry(entry_id, cx)
6635                    .ok_or_else(|| anyhow!("invalid entry"))
6636            })?
6637            .await?;
6638        Ok(proto::ProjectEntryResponse {
6639            entry: None,
6640            worktree_scan_id: worktree_scan_id as u64,
6641        })
6642    }
6643
6644    async fn handle_expand_project_entry(
6645        this: ModelHandle<Self>,
6646        envelope: TypedEnvelope<proto::ExpandProjectEntry>,
6647        _: Arc<Client>,
6648        mut cx: AsyncAppContext,
6649    ) -> Result<proto::ExpandProjectEntryResponse> {
6650        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6651        let worktree = this
6652            .read_with(&cx, |this, cx| this.worktree_for_entry(entry_id, cx))
6653            .ok_or_else(|| anyhow!("invalid request"))?;
6654        worktree
6655            .update(&mut cx, |worktree, cx| {
6656                worktree
6657                    .as_local_mut()
6658                    .unwrap()
6659                    .expand_entry(entry_id, cx)
6660                    .ok_or_else(|| anyhow!("invalid entry"))
6661            })?
6662            .await?;
6663        let worktree_scan_id = worktree.read_with(&cx, |worktree, _| worktree.scan_id()) as u64;
6664        Ok(proto::ExpandProjectEntryResponse { worktree_scan_id })
6665    }
6666
6667    async fn handle_update_diagnostic_summary(
6668        this: ModelHandle<Self>,
6669        envelope: TypedEnvelope<proto::UpdateDiagnosticSummary>,
6670        _: Arc<Client>,
6671        mut cx: AsyncAppContext,
6672    ) -> Result<()> {
6673        this.update(&mut cx, |this, cx| {
6674            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6675            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
6676                if let Some(summary) = envelope.payload.summary {
6677                    let project_path = ProjectPath {
6678                        worktree_id,
6679                        path: Path::new(&summary.path).into(),
6680                    };
6681                    worktree.update(cx, |worktree, _| {
6682                        worktree
6683                            .as_remote_mut()
6684                            .unwrap()
6685                            .update_diagnostic_summary(project_path.path.clone(), &summary);
6686                    });
6687                    cx.emit(Event::DiagnosticsUpdated {
6688                        language_server_id: LanguageServerId(summary.language_server_id as usize),
6689                        path: project_path,
6690                    });
6691                }
6692            }
6693            Ok(())
6694        })
6695    }
6696
6697    async fn handle_start_language_server(
6698        this: ModelHandle<Self>,
6699        envelope: TypedEnvelope<proto::StartLanguageServer>,
6700        _: Arc<Client>,
6701        mut cx: AsyncAppContext,
6702    ) -> Result<()> {
6703        let server = envelope
6704            .payload
6705            .server
6706            .ok_or_else(|| anyhow!("invalid server"))?;
6707        this.update(&mut cx, |this, cx| {
6708            this.language_server_statuses.insert(
6709                LanguageServerId(server.id as usize),
6710                LanguageServerStatus {
6711                    name: server.name,
6712                    pending_work: Default::default(),
6713                    has_pending_diagnostic_updates: false,
6714                    progress_tokens: Default::default(),
6715                },
6716            );
6717            cx.notify();
6718        });
6719        Ok(())
6720    }
6721
6722    async fn handle_update_language_server(
6723        this: ModelHandle<Self>,
6724        envelope: TypedEnvelope<proto::UpdateLanguageServer>,
6725        _: Arc<Client>,
6726        mut cx: AsyncAppContext,
6727    ) -> Result<()> {
6728        this.update(&mut cx, |this, cx| {
6729            let language_server_id = LanguageServerId(envelope.payload.language_server_id as usize);
6730
6731            match envelope
6732                .payload
6733                .variant
6734                .ok_or_else(|| anyhow!("invalid variant"))?
6735            {
6736                proto::update_language_server::Variant::WorkStart(payload) => {
6737                    this.on_lsp_work_start(
6738                        language_server_id,
6739                        payload.token,
6740                        LanguageServerProgress {
6741                            message: payload.message,
6742                            percentage: payload.percentage.map(|p| p as usize),
6743                            last_update_at: Instant::now(),
6744                        },
6745                        cx,
6746                    );
6747                }
6748
6749                proto::update_language_server::Variant::WorkProgress(payload) => {
6750                    this.on_lsp_work_progress(
6751                        language_server_id,
6752                        payload.token,
6753                        LanguageServerProgress {
6754                            message: payload.message,
6755                            percentage: payload.percentage.map(|p| p as usize),
6756                            last_update_at: Instant::now(),
6757                        },
6758                        cx,
6759                    );
6760                }
6761
6762                proto::update_language_server::Variant::WorkEnd(payload) => {
6763                    this.on_lsp_work_end(language_server_id, payload.token, cx);
6764                }
6765
6766                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(_) => {
6767                    this.disk_based_diagnostics_started(language_server_id, cx);
6768                }
6769
6770                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(_) => {
6771                    this.disk_based_diagnostics_finished(language_server_id, cx)
6772                }
6773            }
6774
6775            Ok(())
6776        })
6777    }
6778
6779    async fn handle_update_buffer(
6780        this: ModelHandle<Self>,
6781        envelope: TypedEnvelope<proto::UpdateBuffer>,
6782        _: Arc<Client>,
6783        mut cx: AsyncAppContext,
6784    ) -> Result<proto::Ack> {
6785        this.update(&mut cx, |this, cx| {
6786            let payload = envelope.payload.clone();
6787            let buffer_id = payload.buffer_id;
6788            let ops = payload
6789                .operations
6790                .into_iter()
6791                .map(language::proto::deserialize_operation)
6792                .collect::<Result<Vec<_>, _>>()?;
6793            let is_remote = this.is_remote();
6794            match this.opened_buffers.entry(buffer_id) {
6795                hash_map::Entry::Occupied(mut e) => match e.get_mut() {
6796                    OpenBuffer::Strong(buffer) => {
6797                        buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx))?;
6798                    }
6799                    OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
6800                    OpenBuffer::Weak(_) => {}
6801                },
6802                hash_map::Entry::Vacant(e) => {
6803                    assert!(
6804                        is_remote,
6805                        "received buffer update from {:?}",
6806                        envelope.original_sender_id
6807                    );
6808                    e.insert(OpenBuffer::Operations(ops));
6809                }
6810            }
6811            Ok(proto::Ack {})
6812        })
6813    }
6814
6815    async fn handle_create_buffer_for_peer(
6816        this: ModelHandle<Self>,
6817        envelope: TypedEnvelope<proto::CreateBufferForPeer>,
6818        _: Arc<Client>,
6819        mut cx: AsyncAppContext,
6820    ) -> Result<()> {
6821        this.update(&mut cx, |this, cx| {
6822            match envelope
6823                .payload
6824                .variant
6825                .ok_or_else(|| anyhow!("missing variant"))?
6826            {
6827                proto::create_buffer_for_peer::Variant::State(mut state) => {
6828                    let mut buffer_file = None;
6829                    if let Some(file) = state.file.take() {
6830                        let worktree_id = WorktreeId::from_proto(file.worktree_id);
6831                        let worktree = this.worktree_for_id(worktree_id, cx).ok_or_else(|| {
6832                            anyhow!("no worktree found for id {}", file.worktree_id)
6833                        })?;
6834                        buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
6835                            as Arc<dyn language::File>);
6836                    }
6837
6838                    let buffer_id = state.id;
6839                    let buffer = cx.add_model(|_| {
6840                        Buffer::from_proto(this.replica_id(), state, buffer_file).unwrap()
6841                    });
6842                    this.incomplete_remote_buffers
6843                        .insert(buffer_id, Some(buffer));
6844                }
6845                proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
6846                    let buffer = this
6847                        .incomplete_remote_buffers
6848                        .get(&chunk.buffer_id)
6849                        .cloned()
6850                        .flatten()
6851                        .ok_or_else(|| {
6852                            anyhow!(
6853                                "received chunk for buffer {} without initial state",
6854                                chunk.buffer_id
6855                            )
6856                        })?;
6857                    let operations = chunk
6858                        .operations
6859                        .into_iter()
6860                        .map(language::proto::deserialize_operation)
6861                        .collect::<Result<Vec<_>>>()?;
6862                    buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?;
6863
6864                    if chunk.is_last {
6865                        this.incomplete_remote_buffers.remove(&chunk.buffer_id);
6866                        this.register_buffer(&buffer, cx)?;
6867                    }
6868                }
6869            }
6870
6871            Ok(())
6872        })
6873    }
6874
6875    async fn handle_update_diff_base(
6876        this: ModelHandle<Self>,
6877        envelope: TypedEnvelope<proto::UpdateDiffBase>,
6878        _: Arc<Client>,
6879        mut cx: AsyncAppContext,
6880    ) -> Result<()> {
6881        this.update(&mut cx, |this, cx| {
6882            let buffer_id = envelope.payload.buffer_id;
6883            let diff_base = envelope.payload.diff_base;
6884            if let Some(buffer) = this
6885                .opened_buffers
6886                .get_mut(&buffer_id)
6887                .and_then(|b| b.upgrade(cx))
6888                .or_else(|| {
6889                    this.incomplete_remote_buffers
6890                        .get(&buffer_id)
6891                        .cloned()
6892                        .flatten()
6893                })
6894            {
6895                buffer.update(cx, |buffer, cx| buffer.set_diff_base(diff_base, cx));
6896            }
6897            Ok(())
6898        })
6899    }
6900
6901    async fn handle_update_buffer_file(
6902        this: ModelHandle<Self>,
6903        envelope: TypedEnvelope<proto::UpdateBufferFile>,
6904        _: Arc<Client>,
6905        mut cx: AsyncAppContext,
6906    ) -> Result<()> {
6907        let buffer_id = envelope.payload.buffer_id;
6908
6909        this.update(&mut cx, |this, cx| {
6910            let payload = envelope.payload.clone();
6911            if let Some(buffer) = this
6912                .opened_buffers
6913                .get(&buffer_id)
6914                .and_then(|b| b.upgrade(cx))
6915                .or_else(|| {
6916                    this.incomplete_remote_buffers
6917                        .get(&buffer_id)
6918                        .cloned()
6919                        .flatten()
6920                })
6921            {
6922                let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
6923                let worktree = this
6924                    .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
6925                    .ok_or_else(|| anyhow!("no such worktree"))?;
6926                let file = File::from_proto(file, worktree, cx)?;
6927                buffer.update(cx, |buffer, cx| {
6928                    buffer.file_updated(Arc::new(file), cx).detach();
6929                });
6930                this.detect_language_for_buffer(&buffer, cx);
6931            }
6932            Ok(())
6933        })
6934    }
6935
6936    async fn handle_save_buffer(
6937        this: ModelHandle<Self>,
6938        envelope: TypedEnvelope<proto::SaveBuffer>,
6939        _: Arc<Client>,
6940        mut cx: AsyncAppContext,
6941    ) -> Result<proto::BufferSaved> {
6942        let buffer_id = envelope.payload.buffer_id;
6943        let (project_id, buffer) = this.update(&mut cx, |this, cx| {
6944            let project_id = this.remote_id().ok_or_else(|| anyhow!("not connected"))?;
6945            let buffer = this
6946                .opened_buffers
6947                .get(&buffer_id)
6948                .and_then(|buffer| buffer.upgrade(cx))
6949                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?;
6950            anyhow::Ok((project_id, buffer))
6951        })?;
6952        buffer
6953            .update(&mut cx, |buffer, _| {
6954                buffer.wait_for_version(deserialize_version(&envelope.payload.version))
6955            })
6956            .await?;
6957        let buffer_id = buffer.read_with(&cx, |buffer, _| buffer.remote_id());
6958
6959        this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))
6960            .await?;
6961        Ok(buffer.read_with(&cx, |buffer, _| proto::BufferSaved {
6962            project_id,
6963            buffer_id,
6964            version: serialize_version(buffer.saved_version()),
6965            mtime: Some(buffer.saved_mtime().into()),
6966            fingerprint: language::proto::serialize_fingerprint(buffer.saved_version_fingerprint()),
6967        }))
6968    }
6969
6970    async fn handle_reload_buffers(
6971        this: ModelHandle<Self>,
6972        envelope: TypedEnvelope<proto::ReloadBuffers>,
6973        _: Arc<Client>,
6974        mut cx: AsyncAppContext,
6975    ) -> Result<proto::ReloadBuffersResponse> {
6976        let sender_id = envelope.original_sender_id()?;
6977        let reload = this.update(&mut cx, |this, cx| {
6978            let mut buffers = HashSet::default();
6979            for buffer_id in &envelope.payload.buffer_ids {
6980                buffers.insert(
6981                    this.opened_buffers
6982                        .get(buffer_id)
6983                        .and_then(|buffer| buffer.upgrade(cx))
6984                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
6985                );
6986            }
6987            Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
6988        })?;
6989
6990        let project_transaction = reload.await?;
6991        let project_transaction = this.update(&mut cx, |this, cx| {
6992            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
6993        });
6994        Ok(proto::ReloadBuffersResponse {
6995            transaction: Some(project_transaction),
6996        })
6997    }
6998
6999    async fn handle_synchronize_buffers(
7000        this: ModelHandle<Self>,
7001        envelope: TypedEnvelope<proto::SynchronizeBuffers>,
7002        _: Arc<Client>,
7003        mut cx: AsyncAppContext,
7004    ) -> Result<proto::SynchronizeBuffersResponse> {
7005        let project_id = envelope.payload.project_id;
7006        let mut response = proto::SynchronizeBuffersResponse {
7007            buffers: Default::default(),
7008        };
7009
7010        this.update(&mut cx, |this, cx| {
7011            let Some(guest_id) = envelope.original_sender_id else {
7012                error!("missing original_sender_id on SynchronizeBuffers request");
7013                return;
7014            };
7015
7016            this.shared_buffers.entry(guest_id).or_default().clear();
7017            for buffer in envelope.payload.buffers {
7018                let buffer_id = buffer.id;
7019                let remote_version = language::proto::deserialize_version(&buffer.version);
7020                if let Some(buffer) = this.buffer_for_id(buffer_id, cx) {
7021                    this.shared_buffers
7022                        .entry(guest_id)
7023                        .or_default()
7024                        .insert(buffer_id);
7025
7026                    let buffer = buffer.read(cx);
7027                    response.buffers.push(proto::BufferVersion {
7028                        id: buffer_id,
7029                        version: language::proto::serialize_version(&buffer.version),
7030                    });
7031
7032                    let operations = buffer.serialize_ops(Some(remote_version), cx);
7033                    let client = this.client.clone();
7034                    if let Some(file) = buffer.file() {
7035                        client
7036                            .send(proto::UpdateBufferFile {
7037                                project_id,
7038                                buffer_id: buffer_id as u64,
7039                                file: Some(file.to_proto()),
7040                            })
7041                            .log_err();
7042                    }
7043
7044                    client
7045                        .send(proto::UpdateDiffBase {
7046                            project_id,
7047                            buffer_id: buffer_id as u64,
7048                            diff_base: buffer.diff_base().map(Into::into),
7049                        })
7050                        .log_err();
7051
7052                    client
7053                        .send(proto::BufferReloaded {
7054                            project_id,
7055                            buffer_id,
7056                            version: language::proto::serialize_version(buffer.saved_version()),
7057                            mtime: Some(buffer.saved_mtime().into()),
7058                            fingerprint: language::proto::serialize_fingerprint(
7059                                buffer.saved_version_fingerprint(),
7060                            ),
7061                            line_ending: language::proto::serialize_line_ending(
7062                                buffer.line_ending(),
7063                            ) as i32,
7064                        })
7065                        .log_err();
7066
7067                    cx.background()
7068                        .spawn(
7069                            async move {
7070                                let operations = operations.await;
7071                                for chunk in split_operations(operations) {
7072                                    client
7073                                        .request(proto::UpdateBuffer {
7074                                            project_id,
7075                                            buffer_id,
7076                                            operations: chunk,
7077                                        })
7078                                        .await?;
7079                                }
7080                                anyhow::Ok(())
7081                            }
7082                            .log_err(),
7083                        )
7084                        .detach();
7085                }
7086            }
7087        });
7088
7089        Ok(response)
7090    }
7091
7092    async fn handle_format_buffers(
7093        this: ModelHandle<Self>,
7094        envelope: TypedEnvelope<proto::FormatBuffers>,
7095        _: Arc<Client>,
7096        mut cx: AsyncAppContext,
7097    ) -> Result<proto::FormatBuffersResponse> {
7098        let sender_id = envelope.original_sender_id()?;
7099        let format = this.update(&mut cx, |this, cx| {
7100            let mut buffers = HashSet::default();
7101            for buffer_id in &envelope.payload.buffer_ids {
7102                buffers.insert(
7103                    this.opened_buffers
7104                        .get(buffer_id)
7105                        .and_then(|buffer| buffer.upgrade(cx))
7106                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
7107                );
7108            }
7109            let trigger = FormatTrigger::from_proto(envelope.payload.trigger);
7110            Ok::<_, anyhow::Error>(this.format(buffers, false, trigger, cx))
7111        })?;
7112
7113        let project_transaction = format.await?;
7114        let project_transaction = this.update(&mut cx, |this, cx| {
7115            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
7116        });
7117        Ok(proto::FormatBuffersResponse {
7118            transaction: Some(project_transaction),
7119        })
7120    }
7121
7122    async fn handle_apply_additional_edits_for_completion(
7123        this: ModelHandle<Self>,
7124        envelope: TypedEnvelope<proto::ApplyCompletionAdditionalEdits>,
7125        _: Arc<Client>,
7126        mut cx: AsyncAppContext,
7127    ) -> Result<proto::ApplyCompletionAdditionalEditsResponse> {
7128        let (buffer, completion) = this.update(&mut cx, |this, cx| {
7129            let buffer = this
7130                .opened_buffers
7131                .get(&envelope.payload.buffer_id)
7132                .and_then(|buffer| buffer.upgrade(cx))
7133                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
7134            let language = buffer.read(cx).language();
7135            let completion = language::proto::deserialize_completion(
7136                envelope
7137                    .payload
7138                    .completion
7139                    .ok_or_else(|| anyhow!("invalid completion"))?,
7140                language.cloned(),
7141            );
7142            Ok::<_, anyhow::Error>((buffer, completion))
7143        })?;
7144
7145        let completion = completion.await?;
7146
7147        let apply_additional_edits = this.update(&mut cx, |this, cx| {
7148            this.apply_additional_edits_for_completion(buffer, completion, false, cx)
7149        });
7150
7151        Ok(proto::ApplyCompletionAdditionalEditsResponse {
7152            transaction: apply_additional_edits
7153                .await?
7154                .as_ref()
7155                .map(language::proto::serialize_transaction),
7156        })
7157    }
7158
7159    async fn handle_resolve_completion_documentation(
7160        this: ModelHandle<Self>,
7161        envelope: TypedEnvelope<proto::ResolveCompletionDocumentation>,
7162        _: Arc<Client>,
7163        mut cx: AsyncAppContext,
7164    ) -> Result<proto::ResolveCompletionDocumentationResponse> {
7165        let lsp_completion = serde_json::from_slice(&envelope.payload.lsp_completion)?;
7166
7167        let completion = this
7168            .read_with(&mut cx, |this, _| {
7169                let id = LanguageServerId(envelope.payload.language_server_id as usize);
7170                let Some(server) = this.language_server_for_id(id) else {
7171                    return Err(anyhow!("No language server {id}"));
7172                };
7173
7174                Ok(server.request::<lsp::request::ResolveCompletionItem>(lsp_completion))
7175            })?
7176            .await?;
7177
7178        let mut is_markdown = false;
7179        let text = match completion.documentation {
7180            Some(lsp::Documentation::String(text)) => text,
7181
7182            Some(lsp::Documentation::MarkupContent(lsp::MarkupContent { kind, value })) => {
7183                is_markdown = kind == lsp::MarkupKind::Markdown;
7184                value
7185            }
7186
7187            _ => String::new(),
7188        };
7189
7190        Ok(proto::ResolveCompletionDocumentationResponse { text, is_markdown })
7191    }
7192
7193    async fn handle_apply_code_action(
7194        this: ModelHandle<Self>,
7195        envelope: TypedEnvelope<proto::ApplyCodeAction>,
7196        _: Arc<Client>,
7197        mut cx: AsyncAppContext,
7198    ) -> Result<proto::ApplyCodeActionResponse> {
7199        let sender_id = envelope.original_sender_id()?;
7200        let action = language::proto::deserialize_code_action(
7201            envelope
7202                .payload
7203                .action
7204                .ok_or_else(|| anyhow!("invalid action"))?,
7205        )?;
7206        let apply_code_action = this.update(&mut cx, |this, cx| {
7207            let buffer = this
7208                .opened_buffers
7209                .get(&envelope.payload.buffer_id)
7210                .and_then(|buffer| buffer.upgrade(cx))
7211                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
7212            Ok::<_, anyhow::Error>(this.apply_code_action(buffer, action, false, cx))
7213        })?;
7214
7215        let project_transaction = apply_code_action.await?;
7216        let project_transaction = this.update(&mut cx, |this, cx| {
7217            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
7218        });
7219        Ok(proto::ApplyCodeActionResponse {
7220            transaction: Some(project_transaction),
7221        })
7222    }
7223
7224    async fn handle_on_type_formatting(
7225        this: ModelHandle<Self>,
7226        envelope: TypedEnvelope<proto::OnTypeFormatting>,
7227        _: Arc<Client>,
7228        mut cx: AsyncAppContext,
7229    ) -> Result<proto::OnTypeFormattingResponse> {
7230        let on_type_formatting = this.update(&mut cx, |this, cx| {
7231            let buffer = this
7232                .opened_buffers
7233                .get(&envelope.payload.buffer_id)
7234                .and_then(|buffer| buffer.upgrade(cx))
7235                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
7236            let position = envelope
7237                .payload
7238                .position
7239                .and_then(deserialize_anchor)
7240                .ok_or_else(|| anyhow!("invalid position"))?;
7241            Ok::<_, anyhow::Error>(this.apply_on_type_formatting(
7242                buffer,
7243                position,
7244                envelope.payload.trigger.clone(),
7245                cx,
7246            ))
7247        })?;
7248
7249        let transaction = on_type_formatting
7250            .await?
7251            .as_ref()
7252            .map(language::proto::serialize_transaction);
7253        Ok(proto::OnTypeFormattingResponse { transaction })
7254    }
7255
7256    async fn handle_inlay_hints(
7257        this: ModelHandle<Self>,
7258        envelope: TypedEnvelope<proto::InlayHints>,
7259        _: Arc<Client>,
7260        mut cx: AsyncAppContext,
7261    ) -> Result<proto::InlayHintsResponse> {
7262        let sender_id = envelope.original_sender_id()?;
7263        let buffer = this.update(&mut cx, |this, cx| {
7264            this.opened_buffers
7265                .get(&envelope.payload.buffer_id)
7266                .and_then(|buffer| buffer.upgrade(cx))
7267                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
7268        })?;
7269        let buffer_version = deserialize_version(&envelope.payload.version);
7270
7271        buffer
7272            .update(&mut cx, |buffer, _| {
7273                buffer.wait_for_version(buffer_version.clone())
7274            })
7275            .await
7276            .with_context(|| {
7277                format!(
7278                    "waiting for version {:?} for buffer {}",
7279                    buffer_version,
7280                    buffer.id()
7281                )
7282            })?;
7283
7284        let start = envelope
7285            .payload
7286            .start
7287            .and_then(deserialize_anchor)
7288            .context("missing range start")?;
7289        let end = envelope
7290            .payload
7291            .end
7292            .and_then(deserialize_anchor)
7293            .context("missing range end")?;
7294        let buffer_hints = this
7295            .update(&mut cx, |project, cx| {
7296                project.inlay_hints(buffer, start..end, cx)
7297            })
7298            .await
7299            .context("inlay hints fetch")?;
7300
7301        Ok(this.update(&mut cx, |project, cx| {
7302            InlayHints::response_to_proto(buffer_hints, project, sender_id, &buffer_version, cx)
7303        }))
7304    }
7305
7306    async fn handle_resolve_inlay_hint(
7307        this: ModelHandle<Self>,
7308        envelope: TypedEnvelope<proto::ResolveInlayHint>,
7309        _: Arc<Client>,
7310        mut cx: AsyncAppContext,
7311    ) -> Result<proto::ResolveInlayHintResponse> {
7312        let proto_hint = envelope
7313            .payload
7314            .hint
7315            .expect("incorrect protobuf resolve inlay hint message: missing the inlay hint");
7316        let hint = InlayHints::proto_to_project_hint(proto_hint)
7317            .context("resolved proto inlay hint conversion")?;
7318        let buffer = this.update(&mut cx, |this, cx| {
7319            this.opened_buffers
7320                .get(&envelope.payload.buffer_id)
7321                .and_then(|buffer| buffer.upgrade(cx))
7322                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
7323        })?;
7324        let response_hint = this
7325            .update(&mut cx, |project, cx| {
7326                project.resolve_inlay_hint(
7327                    hint,
7328                    buffer,
7329                    LanguageServerId(envelope.payload.language_server_id as usize),
7330                    cx,
7331                )
7332            })
7333            .await
7334            .context("inlay hints fetch")?;
7335        Ok(proto::ResolveInlayHintResponse {
7336            hint: Some(InlayHints::project_to_proto_hint(response_hint)),
7337        })
7338    }
7339
7340    async fn handle_refresh_inlay_hints(
7341        this: ModelHandle<Self>,
7342        _: TypedEnvelope<proto::RefreshInlayHints>,
7343        _: Arc<Client>,
7344        mut cx: AsyncAppContext,
7345    ) -> Result<proto::Ack> {
7346        this.update(&mut cx, |_, cx| {
7347            cx.emit(Event::RefreshInlayHints);
7348        });
7349        Ok(proto::Ack {})
7350    }
7351
7352    async fn handle_lsp_command<T: LspCommand>(
7353        this: ModelHandle<Self>,
7354        envelope: TypedEnvelope<T::ProtoRequest>,
7355        _: Arc<Client>,
7356        mut cx: AsyncAppContext,
7357    ) -> Result<<T::ProtoRequest as proto::RequestMessage>::Response>
7358    where
7359        <T::LspRequest as lsp::request::Request>::Result: Send,
7360    {
7361        let sender_id = envelope.original_sender_id()?;
7362        let buffer_id = T::buffer_id_from_proto(&envelope.payload);
7363        let buffer_handle = this.read_with(&cx, |this, _| {
7364            this.opened_buffers
7365                .get(&buffer_id)
7366                .and_then(|buffer| buffer.upgrade(&cx))
7367                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
7368        })?;
7369        let request = T::from_proto(
7370            envelope.payload,
7371            this.clone(),
7372            buffer_handle.clone(),
7373            cx.clone(),
7374        )
7375        .await?;
7376        let buffer_version = buffer_handle.read_with(&cx, |buffer, _| buffer.version());
7377        let response = this
7378            .update(&mut cx, |this, cx| {
7379                this.request_lsp(buffer_handle, LanguageServerToQuery::Primary, request, cx)
7380            })
7381            .await?;
7382        this.update(&mut cx, |this, cx| {
7383            Ok(T::response_to_proto(
7384                response,
7385                this,
7386                sender_id,
7387                &buffer_version,
7388                cx,
7389            ))
7390        })
7391    }
7392
7393    async fn handle_get_project_symbols(
7394        this: ModelHandle<Self>,
7395        envelope: TypedEnvelope<proto::GetProjectSymbols>,
7396        _: Arc<Client>,
7397        mut cx: AsyncAppContext,
7398    ) -> Result<proto::GetProjectSymbolsResponse> {
7399        let symbols = this
7400            .update(&mut cx, |this, cx| {
7401                this.symbols(&envelope.payload.query, cx)
7402            })
7403            .await?;
7404
7405        Ok(proto::GetProjectSymbolsResponse {
7406            symbols: symbols.iter().map(serialize_symbol).collect(),
7407        })
7408    }
7409
7410    async fn handle_search_project(
7411        this: ModelHandle<Self>,
7412        envelope: TypedEnvelope<proto::SearchProject>,
7413        _: Arc<Client>,
7414        mut cx: AsyncAppContext,
7415    ) -> Result<proto::SearchProjectResponse> {
7416        let peer_id = envelope.original_sender_id()?;
7417        let query = SearchQuery::from_proto(envelope.payload)?;
7418        let mut result = this.update(&mut cx, |this, cx| this.search(query, cx));
7419
7420        cx.spawn(|mut cx| async move {
7421            let mut locations = Vec::new();
7422            while let Some((buffer, ranges)) = result.next().await {
7423                for range in ranges {
7424                    let start = serialize_anchor(&range.start);
7425                    let end = serialize_anchor(&range.end);
7426                    let buffer_id = this.update(&mut cx, |this, cx| {
7427                        this.create_buffer_for_peer(&buffer, peer_id, cx)
7428                    });
7429                    locations.push(proto::Location {
7430                        buffer_id,
7431                        start: Some(start),
7432                        end: Some(end),
7433                    });
7434                }
7435            }
7436            Ok(proto::SearchProjectResponse { locations })
7437        })
7438        .await
7439    }
7440
7441    async fn handle_open_buffer_for_symbol(
7442        this: ModelHandle<Self>,
7443        envelope: TypedEnvelope<proto::OpenBufferForSymbol>,
7444        _: Arc<Client>,
7445        mut cx: AsyncAppContext,
7446    ) -> Result<proto::OpenBufferForSymbolResponse> {
7447        let peer_id = envelope.original_sender_id()?;
7448        let symbol = envelope
7449            .payload
7450            .symbol
7451            .ok_or_else(|| anyhow!("invalid symbol"))?;
7452        let symbol = this
7453            .read_with(&cx, |this, _| this.deserialize_symbol(symbol))
7454            .await?;
7455        let symbol = this.read_with(&cx, |this, _| {
7456            let signature = this.symbol_signature(&symbol.path);
7457            if signature == symbol.signature {
7458                Ok(symbol)
7459            } else {
7460                Err(anyhow!("invalid symbol signature"))
7461            }
7462        })?;
7463        let buffer = this
7464            .update(&mut cx, |this, cx| this.open_buffer_for_symbol(&symbol, cx))
7465            .await?;
7466
7467        Ok(proto::OpenBufferForSymbolResponse {
7468            buffer_id: this.update(&mut cx, |this, cx| {
7469                this.create_buffer_for_peer(&buffer, peer_id, cx)
7470            }),
7471        })
7472    }
7473
7474    fn symbol_signature(&self, project_path: &ProjectPath) -> [u8; 32] {
7475        let mut hasher = Sha256::new();
7476        hasher.update(project_path.worktree_id.to_proto().to_be_bytes());
7477        hasher.update(project_path.path.to_string_lossy().as_bytes());
7478        hasher.update(self.nonce.to_be_bytes());
7479        hasher.finalize().as_slice().try_into().unwrap()
7480    }
7481
7482    async fn handle_open_buffer_by_id(
7483        this: ModelHandle<Self>,
7484        envelope: TypedEnvelope<proto::OpenBufferById>,
7485        _: Arc<Client>,
7486        mut cx: AsyncAppContext,
7487    ) -> Result<proto::OpenBufferResponse> {
7488        let peer_id = envelope.original_sender_id()?;
7489        let buffer = this
7490            .update(&mut cx, |this, cx| {
7491                this.open_buffer_by_id(envelope.payload.id, cx)
7492            })
7493            .await?;
7494        this.update(&mut cx, |this, cx| {
7495            Ok(proto::OpenBufferResponse {
7496                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
7497            })
7498        })
7499    }
7500
7501    async fn handle_open_buffer_by_path(
7502        this: ModelHandle<Self>,
7503        envelope: TypedEnvelope<proto::OpenBufferByPath>,
7504        _: Arc<Client>,
7505        mut cx: AsyncAppContext,
7506    ) -> Result<proto::OpenBufferResponse> {
7507        let peer_id = envelope.original_sender_id()?;
7508        let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
7509        let open_buffer = this.update(&mut cx, |this, cx| {
7510            this.open_buffer(
7511                ProjectPath {
7512                    worktree_id,
7513                    path: PathBuf::from(envelope.payload.path).into(),
7514                },
7515                cx,
7516            )
7517        });
7518
7519        let buffer = open_buffer.await?;
7520        this.update(&mut cx, |this, cx| {
7521            Ok(proto::OpenBufferResponse {
7522                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
7523            })
7524        })
7525    }
7526
7527    fn serialize_project_transaction_for_peer(
7528        &mut self,
7529        project_transaction: ProjectTransaction,
7530        peer_id: proto::PeerId,
7531        cx: &mut AppContext,
7532    ) -> proto::ProjectTransaction {
7533        let mut serialized_transaction = proto::ProjectTransaction {
7534            buffer_ids: Default::default(),
7535            transactions: Default::default(),
7536        };
7537        for (buffer, transaction) in project_transaction.0 {
7538            serialized_transaction
7539                .buffer_ids
7540                .push(self.create_buffer_for_peer(&buffer, peer_id, cx));
7541            serialized_transaction
7542                .transactions
7543                .push(language::proto::serialize_transaction(&transaction));
7544        }
7545        serialized_transaction
7546    }
7547
7548    fn deserialize_project_transaction(
7549        &mut self,
7550        message: proto::ProjectTransaction,
7551        push_to_history: bool,
7552        cx: &mut ModelContext<Self>,
7553    ) -> Task<Result<ProjectTransaction>> {
7554        cx.spawn(|this, mut cx| async move {
7555            let mut project_transaction = ProjectTransaction::default();
7556            for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
7557            {
7558                let buffer = this
7559                    .update(&mut cx, |this, cx| {
7560                        this.wait_for_remote_buffer(buffer_id, cx)
7561                    })
7562                    .await?;
7563                let transaction = language::proto::deserialize_transaction(transaction)?;
7564                project_transaction.0.insert(buffer, transaction);
7565            }
7566
7567            for (buffer, transaction) in &project_transaction.0 {
7568                buffer
7569                    .update(&mut cx, |buffer, _| {
7570                        buffer.wait_for_edits(transaction.edit_ids.iter().copied())
7571                    })
7572                    .await?;
7573
7574                if push_to_history {
7575                    buffer.update(&mut cx, |buffer, _| {
7576                        buffer.push_transaction(transaction.clone(), Instant::now());
7577                    });
7578                }
7579            }
7580
7581            Ok(project_transaction)
7582        })
7583    }
7584
7585    fn create_buffer_for_peer(
7586        &mut self,
7587        buffer: &ModelHandle<Buffer>,
7588        peer_id: proto::PeerId,
7589        cx: &mut AppContext,
7590    ) -> u64 {
7591        let buffer_id = buffer.read(cx).remote_id();
7592        if let Some(ProjectClientState::Local { updates_tx, .. }) = &self.client_state {
7593            updates_tx
7594                .unbounded_send(LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id })
7595                .ok();
7596        }
7597        buffer_id
7598    }
7599
7600    fn wait_for_remote_buffer(
7601        &mut self,
7602        id: u64,
7603        cx: &mut ModelContext<Self>,
7604    ) -> Task<Result<ModelHandle<Buffer>>> {
7605        let mut opened_buffer_rx = self.opened_buffer.1.clone();
7606
7607        cx.spawn_weak(|this, mut cx| async move {
7608            let buffer = loop {
7609                let Some(this) = this.upgrade(&cx) else {
7610                    return Err(anyhow!("project dropped"));
7611                };
7612
7613                let buffer = this.read_with(&cx, |this, cx| {
7614                    this.opened_buffers
7615                        .get(&id)
7616                        .and_then(|buffer| buffer.upgrade(cx))
7617                });
7618
7619                if let Some(buffer) = buffer {
7620                    break buffer;
7621                } else if this.read_with(&cx, |this, _| this.is_read_only()) {
7622                    return Err(anyhow!("disconnected before buffer {} could be opened", id));
7623                }
7624
7625                this.update(&mut cx, |this, _| {
7626                    this.incomplete_remote_buffers.entry(id).or_default();
7627                });
7628                drop(this);
7629
7630                opened_buffer_rx
7631                    .next()
7632                    .await
7633                    .ok_or_else(|| anyhow!("project dropped while waiting for buffer"))?;
7634            };
7635
7636            Ok(buffer)
7637        })
7638    }
7639
7640    fn synchronize_remote_buffers(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
7641        let project_id = match self.client_state.as_ref() {
7642            Some(ProjectClientState::Remote {
7643                sharing_has_stopped,
7644                remote_id,
7645                ..
7646            }) => {
7647                if *sharing_has_stopped {
7648                    return Task::ready(Err(anyhow!(
7649                        "can't synchronize remote buffers on a readonly project"
7650                    )));
7651                } else {
7652                    *remote_id
7653                }
7654            }
7655            Some(ProjectClientState::Local { .. }) | None => {
7656                return Task::ready(Err(anyhow!(
7657                    "can't synchronize remote buffers on a local project"
7658                )))
7659            }
7660        };
7661
7662        let client = self.client.clone();
7663        cx.spawn(|this, cx| async move {
7664            let (buffers, incomplete_buffer_ids) = this.read_with(&cx, |this, cx| {
7665                let buffers = this
7666                    .opened_buffers
7667                    .iter()
7668                    .filter_map(|(id, buffer)| {
7669                        let buffer = buffer.upgrade(cx)?;
7670                        Some(proto::BufferVersion {
7671                            id: *id,
7672                            version: language::proto::serialize_version(&buffer.read(cx).version),
7673                        })
7674                    })
7675                    .collect();
7676                let incomplete_buffer_ids = this
7677                    .incomplete_remote_buffers
7678                    .keys()
7679                    .copied()
7680                    .collect::<Vec<_>>();
7681
7682                (buffers, incomplete_buffer_ids)
7683            });
7684            let response = client
7685                .request(proto::SynchronizeBuffers {
7686                    project_id,
7687                    buffers,
7688                })
7689                .await?;
7690
7691            let send_updates_for_buffers = response.buffers.into_iter().map(|buffer| {
7692                let client = client.clone();
7693                let buffer_id = buffer.id;
7694                let remote_version = language::proto::deserialize_version(&buffer.version);
7695                this.read_with(&cx, |this, cx| {
7696                    if let Some(buffer) = this.buffer_for_id(buffer_id, cx) {
7697                        let operations = buffer.read(cx).serialize_ops(Some(remote_version), cx);
7698                        cx.background().spawn(async move {
7699                            let operations = operations.await;
7700                            for chunk in split_operations(operations) {
7701                                client
7702                                    .request(proto::UpdateBuffer {
7703                                        project_id,
7704                                        buffer_id,
7705                                        operations: chunk,
7706                                    })
7707                                    .await?;
7708                            }
7709                            anyhow::Ok(())
7710                        })
7711                    } else {
7712                        Task::ready(Ok(()))
7713                    }
7714                })
7715            });
7716
7717            // Any incomplete buffers have open requests waiting. Request that the host sends
7718            // creates these buffers for us again to unblock any waiting futures.
7719            for id in incomplete_buffer_ids {
7720                cx.background()
7721                    .spawn(client.request(proto::OpenBufferById { project_id, id }))
7722                    .detach();
7723            }
7724
7725            futures::future::join_all(send_updates_for_buffers)
7726                .await
7727                .into_iter()
7728                .collect()
7729        })
7730    }
7731
7732    pub fn worktree_metadata_protos(&self, cx: &AppContext) -> Vec<proto::WorktreeMetadata> {
7733        self.worktrees(cx)
7734            .map(|worktree| {
7735                let worktree = worktree.read(cx);
7736                proto::WorktreeMetadata {
7737                    id: worktree.id().to_proto(),
7738                    root_name: worktree.root_name().into(),
7739                    visible: worktree.is_visible(),
7740                    abs_path: worktree.abs_path().to_string_lossy().into(),
7741                }
7742            })
7743            .collect()
7744    }
7745
7746    fn set_worktrees_from_proto(
7747        &mut self,
7748        worktrees: Vec<proto::WorktreeMetadata>,
7749        cx: &mut ModelContext<Project>,
7750    ) -> Result<()> {
7751        let replica_id = self.replica_id();
7752        let remote_id = self.remote_id().ok_or_else(|| anyhow!("invalid project"))?;
7753
7754        let mut old_worktrees_by_id = self
7755            .worktrees
7756            .drain(..)
7757            .filter_map(|worktree| {
7758                let worktree = worktree.upgrade(cx)?;
7759                Some((worktree.read(cx).id(), worktree))
7760            })
7761            .collect::<HashMap<_, _>>();
7762
7763        for worktree in worktrees {
7764            if let Some(old_worktree) =
7765                old_worktrees_by_id.remove(&WorktreeId::from_proto(worktree.id))
7766            {
7767                self.worktrees.push(WorktreeHandle::Strong(old_worktree));
7768            } else {
7769                let worktree =
7770                    Worktree::remote(remote_id, replica_id, worktree, self.client.clone(), cx);
7771                let _ = self.add_worktree(&worktree, cx);
7772            }
7773        }
7774
7775        self.metadata_changed(cx);
7776        for id in old_worktrees_by_id.keys() {
7777            cx.emit(Event::WorktreeRemoved(*id));
7778        }
7779
7780        Ok(())
7781    }
7782
7783    fn set_collaborators_from_proto(
7784        &mut self,
7785        messages: Vec<proto::Collaborator>,
7786        cx: &mut ModelContext<Self>,
7787    ) -> Result<()> {
7788        let mut collaborators = HashMap::default();
7789        for message in messages {
7790            let collaborator = Collaborator::from_proto(message)?;
7791            collaborators.insert(collaborator.peer_id, collaborator);
7792        }
7793        for old_peer_id in self.collaborators.keys() {
7794            if !collaborators.contains_key(old_peer_id) {
7795                cx.emit(Event::CollaboratorLeft(*old_peer_id));
7796            }
7797        }
7798        self.collaborators = collaborators;
7799        Ok(())
7800    }
7801
7802    fn deserialize_symbol(
7803        &self,
7804        serialized_symbol: proto::Symbol,
7805    ) -> impl Future<Output = Result<Symbol>> {
7806        let languages = self.languages.clone();
7807        async move {
7808            let source_worktree_id = WorktreeId::from_proto(serialized_symbol.source_worktree_id);
7809            let worktree_id = WorktreeId::from_proto(serialized_symbol.worktree_id);
7810            let start = serialized_symbol
7811                .start
7812                .ok_or_else(|| anyhow!("invalid start"))?;
7813            let end = serialized_symbol
7814                .end
7815                .ok_or_else(|| anyhow!("invalid end"))?;
7816            let kind = unsafe { mem::transmute(serialized_symbol.kind) };
7817            let path = ProjectPath {
7818                worktree_id,
7819                path: PathBuf::from(serialized_symbol.path).into(),
7820            };
7821            let language = languages
7822                .language_for_file(&path.path, None)
7823                .await
7824                .log_err();
7825            Ok(Symbol {
7826                language_server_name: LanguageServerName(
7827                    serialized_symbol.language_server_name.into(),
7828                ),
7829                source_worktree_id,
7830                path,
7831                label: {
7832                    match language {
7833                        Some(language) => {
7834                            language
7835                                .label_for_symbol(&serialized_symbol.name, kind)
7836                                .await
7837                        }
7838                        None => None,
7839                    }
7840                    .unwrap_or_else(|| CodeLabel::plain(serialized_symbol.name.clone(), None))
7841                },
7842
7843                name: serialized_symbol.name,
7844                range: Unclipped(PointUtf16::new(start.row, start.column))
7845                    ..Unclipped(PointUtf16::new(end.row, end.column)),
7846                kind,
7847                signature: serialized_symbol
7848                    .signature
7849                    .try_into()
7850                    .map_err(|_| anyhow!("invalid signature"))?,
7851            })
7852        }
7853    }
7854
7855    async fn handle_buffer_saved(
7856        this: ModelHandle<Self>,
7857        envelope: TypedEnvelope<proto::BufferSaved>,
7858        _: Arc<Client>,
7859        mut cx: AsyncAppContext,
7860    ) -> Result<()> {
7861        let fingerprint = deserialize_fingerprint(&envelope.payload.fingerprint)?;
7862        let version = deserialize_version(&envelope.payload.version);
7863        let mtime = envelope
7864            .payload
7865            .mtime
7866            .ok_or_else(|| anyhow!("missing mtime"))?
7867            .into();
7868
7869        this.update(&mut cx, |this, cx| {
7870            let buffer = this
7871                .opened_buffers
7872                .get(&envelope.payload.buffer_id)
7873                .and_then(|buffer| buffer.upgrade(cx))
7874                .or_else(|| {
7875                    this.incomplete_remote_buffers
7876                        .get(&envelope.payload.buffer_id)
7877                        .and_then(|b| b.clone())
7878                });
7879            if let Some(buffer) = buffer {
7880                buffer.update(cx, |buffer, cx| {
7881                    buffer.did_save(version, fingerprint, mtime, cx);
7882                });
7883            }
7884            Ok(())
7885        })
7886    }
7887
7888    async fn handle_buffer_reloaded(
7889        this: ModelHandle<Self>,
7890        envelope: TypedEnvelope<proto::BufferReloaded>,
7891        _: Arc<Client>,
7892        mut cx: AsyncAppContext,
7893    ) -> Result<()> {
7894        let payload = envelope.payload;
7895        let version = deserialize_version(&payload.version);
7896        let fingerprint = deserialize_fingerprint(&payload.fingerprint)?;
7897        let line_ending = deserialize_line_ending(
7898            proto::LineEnding::from_i32(payload.line_ending)
7899                .ok_or_else(|| anyhow!("missing line ending"))?,
7900        );
7901        let mtime = payload
7902            .mtime
7903            .ok_or_else(|| anyhow!("missing mtime"))?
7904            .into();
7905        this.update(&mut cx, |this, cx| {
7906            let buffer = this
7907                .opened_buffers
7908                .get(&payload.buffer_id)
7909                .and_then(|buffer| buffer.upgrade(cx))
7910                .or_else(|| {
7911                    this.incomplete_remote_buffers
7912                        .get(&payload.buffer_id)
7913                        .cloned()
7914                        .flatten()
7915                });
7916            if let Some(buffer) = buffer {
7917                buffer.update(cx, |buffer, cx| {
7918                    buffer.did_reload(version, fingerprint, line_ending, mtime, cx);
7919                });
7920            }
7921            Ok(())
7922        })
7923    }
7924
7925    #[allow(clippy::type_complexity)]
7926    fn edits_from_lsp(
7927        &mut self,
7928        buffer: &ModelHandle<Buffer>,
7929        lsp_edits: impl 'static + Send + IntoIterator<Item = lsp::TextEdit>,
7930        server_id: LanguageServerId,
7931        version: Option<i32>,
7932        cx: &mut ModelContext<Self>,
7933    ) -> Task<Result<Vec<(Range<Anchor>, String)>>> {
7934        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx);
7935        cx.background().spawn(async move {
7936            let snapshot = snapshot?;
7937            let mut lsp_edits = lsp_edits
7938                .into_iter()
7939                .map(|edit| (range_from_lsp(edit.range), edit.new_text))
7940                .collect::<Vec<_>>();
7941            lsp_edits.sort_by_key(|(range, _)| range.start);
7942
7943            let mut lsp_edits = lsp_edits.into_iter().peekable();
7944            let mut edits = Vec::new();
7945            while let Some((range, mut new_text)) = lsp_edits.next() {
7946                // Clip invalid ranges provided by the language server.
7947                let mut range = snapshot.clip_point_utf16(range.start, Bias::Left)
7948                    ..snapshot.clip_point_utf16(range.end, Bias::Left);
7949
7950                // Combine any LSP edits that are adjacent.
7951                //
7952                // Also, combine LSP edits that are separated from each other by only
7953                // a newline. This is important because for some code actions,
7954                // Rust-analyzer rewrites the entire buffer via a series of edits that
7955                // are separated by unchanged newline characters.
7956                //
7957                // In order for the diffing logic below to work properly, any edits that
7958                // cancel each other out must be combined into one.
7959                while let Some((next_range, next_text)) = lsp_edits.peek() {
7960                    if next_range.start.0 > range.end {
7961                        if next_range.start.0.row > range.end.row + 1
7962                            || next_range.start.0.column > 0
7963                            || snapshot.clip_point_utf16(
7964                                Unclipped(PointUtf16::new(range.end.row, u32::MAX)),
7965                                Bias::Left,
7966                            ) > range.end
7967                        {
7968                            break;
7969                        }
7970                        new_text.push('\n');
7971                    }
7972                    range.end = snapshot.clip_point_utf16(next_range.end, Bias::Left);
7973                    new_text.push_str(next_text);
7974                    lsp_edits.next();
7975                }
7976
7977                // For multiline edits, perform a diff of the old and new text so that
7978                // we can identify the changes more precisely, preserving the locations
7979                // of any anchors positioned in the unchanged regions.
7980                if range.end.row > range.start.row {
7981                    let mut offset = range.start.to_offset(&snapshot);
7982                    let old_text = snapshot.text_for_range(range).collect::<String>();
7983
7984                    let diff = TextDiff::from_lines(old_text.as_str(), &new_text);
7985                    let mut moved_since_edit = true;
7986                    for change in diff.iter_all_changes() {
7987                        let tag = change.tag();
7988                        let value = change.value();
7989                        match tag {
7990                            ChangeTag::Equal => {
7991                                offset += value.len();
7992                                moved_since_edit = true;
7993                            }
7994                            ChangeTag::Delete => {
7995                                let start = snapshot.anchor_after(offset);
7996                                let end = snapshot.anchor_before(offset + value.len());
7997                                if moved_since_edit {
7998                                    edits.push((start..end, String::new()));
7999                                } else {
8000                                    edits.last_mut().unwrap().0.end = end;
8001                                }
8002                                offset += value.len();
8003                                moved_since_edit = false;
8004                            }
8005                            ChangeTag::Insert => {
8006                                if moved_since_edit {
8007                                    let anchor = snapshot.anchor_after(offset);
8008                                    edits.push((anchor..anchor, value.to_string()));
8009                                } else {
8010                                    edits.last_mut().unwrap().1.push_str(value);
8011                                }
8012                                moved_since_edit = false;
8013                            }
8014                        }
8015                    }
8016                } else if range.end == range.start {
8017                    let anchor = snapshot.anchor_after(range.start);
8018                    edits.push((anchor..anchor, new_text));
8019                } else {
8020                    let edit_start = snapshot.anchor_after(range.start);
8021                    let edit_end = snapshot.anchor_before(range.end);
8022                    edits.push((edit_start..edit_end, new_text));
8023                }
8024            }
8025
8026            Ok(edits)
8027        })
8028    }
8029
8030    fn buffer_snapshot_for_lsp_version(
8031        &mut self,
8032        buffer: &ModelHandle<Buffer>,
8033        server_id: LanguageServerId,
8034        version: Option<i32>,
8035        cx: &AppContext,
8036    ) -> Result<TextBufferSnapshot> {
8037        const OLD_VERSIONS_TO_RETAIN: i32 = 10;
8038
8039        if let Some(version) = version {
8040            let buffer_id = buffer.read(cx).remote_id();
8041            let snapshots = self
8042                .buffer_snapshots
8043                .get_mut(&buffer_id)
8044                .and_then(|m| m.get_mut(&server_id))
8045                .ok_or_else(|| {
8046                    anyhow!("no snapshots found for buffer {buffer_id} and server {server_id}")
8047                })?;
8048
8049            let found_snapshot = snapshots
8050                .binary_search_by_key(&version, |e| e.version)
8051                .map(|ix| snapshots[ix].snapshot.clone())
8052                .map_err(|_| {
8053                    anyhow!("snapshot not found for buffer {buffer_id} server {server_id} at version {version}")
8054                })?;
8055
8056            snapshots.retain(|snapshot| snapshot.version + OLD_VERSIONS_TO_RETAIN >= version);
8057            Ok(found_snapshot)
8058        } else {
8059            Ok((buffer.read(cx)).text_snapshot())
8060        }
8061    }
8062
8063    pub fn language_servers(
8064        &self,
8065    ) -> impl '_ + Iterator<Item = (LanguageServerId, LanguageServerName, WorktreeId)> {
8066        self.language_server_ids
8067            .iter()
8068            .map(|((worktree_id, server_name), server_id)| {
8069                (*server_id, server_name.clone(), *worktree_id)
8070            })
8071    }
8072
8073    pub fn supplementary_language_servers(
8074        &self,
8075    ) -> impl '_
8076           + Iterator<
8077        Item = (
8078            &LanguageServerId,
8079            &(LanguageServerName, Arc<LanguageServer>),
8080        ),
8081    > {
8082        self.supplementary_language_servers.iter()
8083    }
8084
8085    pub fn language_server_for_id(&self, id: LanguageServerId) -> Option<Arc<LanguageServer>> {
8086        if let Some(LanguageServerState::Running { server, .. }) = self.language_servers.get(&id) {
8087            Some(server.clone())
8088        } else if let Some((_, server)) = self.supplementary_language_servers.get(&id) {
8089            Some(Arc::clone(server))
8090        } else {
8091            None
8092        }
8093    }
8094
8095    pub fn language_servers_for_buffer(
8096        &self,
8097        buffer: &Buffer,
8098        cx: &AppContext,
8099    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
8100        self.language_server_ids_for_buffer(buffer, cx)
8101            .into_iter()
8102            .filter_map(|server_id| match self.language_servers.get(&server_id)? {
8103                LanguageServerState::Running {
8104                    adapter, server, ..
8105                } => Some((adapter, server)),
8106                _ => None,
8107            })
8108    }
8109
8110    fn primary_language_server_for_buffer(
8111        &self,
8112        buffer: &Buffer,
8113        cx: &AppContext,
8114    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
8115        self.language_servers_for_buffer(buffer, cx).next()
8116    }
8117
8118    pub fn language_server_for_buffer(
8119        &self,
8120        buffer: &Buffer,
8121        server_id: LanguageServerId,
8122        cx: &AppContext,
8123    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
8124        self.language_servers_for_buffer(buffer, cx)
8125            .find(|(_, s)| s.server_id() == server_id)
8126    }
8127
8128    fn language_server_ids_for_buffer(
8129        &self,
8130        buffer: &Buffer,
8131        cx: &AppContext,
8132    ) -> Vec<LanguageServerId> {
8133        if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language()) {
8134            let worktree_id = file.worktree_id(cx);
8135            language
8136                .lsp_adapters()
8137                .iter()
8138                .flat_map(|adapter| {
8139                    let key = (worktree_id, adapter.name.clone());
8140                    self.language_server_ids.get(&key).copied()
8141                })
8142                .collect()
8143        } else {
8144            Vec::new()
8145        }
8146    }
8147}
8148
8149fn subscribe_for_copilot_events(
8150    copilot: &ModelHandle<Copilot>,
8151    cx: &mut ModelContext<'_, Project>,
8152) -> gpui::Subscription {
8153    cx.subscribe(
8154        copilot,
8155        |project, copilot, copilot_event, cx| match copilot_event {
8156            copilot::Event::CopilotLanguageServerStarted => {
8157                match copilot.read(cx).language_server() {
8158                    Some((name, copilot_server)) => {
8159                        // Another event wants to re-add the server that was already added and subscribed to, avoid doing it again.
8160                        if !copilot_server.has_notification_handler::<copilot::request::LogMessage>() {
8161                            let new_server_id = copilot_server.server_id();
8162                            let weak_project = cx.weak_handle();
8163                            let copilot_log_subscription = copilot_server
8164                                .on_notification::<copilot::request::LogMessage, _>(
8165                                    move |params, mut cx| {
8166                                        if let Some(project) = weak_project.upgrade(&mut cx) {
8167                                            project.update(&mut cx, |_, cx| {
8168                                                cx.emit(Event::LanguageServerLog(
8169                                                    new_server_id,
8170                                                    params.message,
8171                                                ));
8172                                            })
8173                                        }
8174                                    },
8175                                );
8176                            project.supplementary_language_servers.insert(new_server_id, (name.clone(), Arc::clone(copilot_server)));
8177                            project.copilot_log_subscription = Some(copilot_log_subscription);
8178                            cx.emit(Event::LanguageServerAdded(new_server_id));
8179                        }
8180                    }
8181                    None => debug_panic!("Received Copilot language server started event, but no language server is running"),
8182                }
8183            }
8184        },
8185    )
8186}
8187
8188fn glob_literal_prefix<'a>(glob: &'a str) -> &'a str {
8189    let mut literal_end = 0;
8190    for (i, part) in glob.split(path::MAIN_SEPARATOR).enumerate() {
8191        if part.contains(&['*', '?', '{', '}']) {
8192            break;
8193        } else {
8194            if i > 0 {
8195                // Acount for separator prior to this part
8196                literal_end += path::MAIN_SEPARATOR.len_utf8();
8197            }
8198            literal_end += part.len();
8199        }
8200    }
8201    &glob[..literal_end]
8202}
8203
8204impl WorktreeHandle {
8205    pub fn upgrade(&self, cx: &AppContext) -> Option<ModelHandle<Worktree>> {
8206        match self {
8207            WorktreeHandle::Strong(handle) => Some(handle.clone()),
8208            WorktreeHandle::Weak(handle) => handle.upgrade(cx),
8209        }
8210    }
8211
8212    pub fn handle_id(&self) -> usize {
8213        match self {
8214            WorktreeHandle::Strong(handle) => handle.id(),
8215            WorktreeHandle::Weak(handle) => handle.id(),
8216        }
8217    }
8218}
8219
8220impl OpenBuffer {
8221    pub fn upgrade(&self, cx: &impl BorrowAppContext) -> Option<ModelHandle<Buffer>> {
8222        match self {
8223            OpenBuffer::Strong(handle) => Some(handle.clone()),
8224            OpenBuffer::Weak(handle) => handle.upgrade(cx),
8225            OpenBuffer::Operations(_) => None,
8226        }
8227    }
8228}
8229
8230pub struct PathMatchCandidateSet {
8231    pub snapshot: Snapshot,
8232    pub include_ignored: bool,
8233    pub include_root_name: bool,
8234}
8235
8236impl<'a> fuzzy::PathMatchCandidateSet<'a> for PathMatchCandidateSet {
8237    type Candidates = PathMatchCandidateSetIter<'a>;
8238
8239    fn id(&self) -> usize {
8240        self.snapshot.id().to_usize()
8241    }
8242
8243    fn len(&self) -> usize {
8244        if self.include_ignored {
8245            self.snapshot.file_count()
8246        } else {
8247            self.snapshot.visible_file_count()
8248        }
8249    }
8250
8251    fn prefix(&self) -> Arc<str> {
8252        if self.snapshot.root_entry().map_or(false, |e| e.is_file()) {
8253            self.snapshot.root_name().into()
8254        } else if self.include_root_name {
8255            format!("{}/", self.snapshot.root_name()).into()
8256        } else {
8257            "".into()
8258        }
8259    }
8260
8261    fn candidates(&'a self, start: usize) -> Self::Candidates {
8262        PathMatchCandidateSetIter {
8263            traversal: self.snapshot.files(self.include_ignored, start),
8264        }
8265    }
8266}
8267
8268pub struct PathMatchCandidateSetIter<'a> {
8269    traversal: Traversal<'a>,
8270}
8271
8272impl<'a> Iterator for PathMatchCandidateSetIter<'a> {
8273    type Item = fuzzy::PathMatchCandidate<'a>;
8274
8275    fn next(&mut self) -> Option<Self::Item> {
8276        self.traversal.next().map(|entry| {
8277            if let EntryKind::File(char_bag) = entry.kind {
8278                fuzzy::PathMatchCandidate {
8279                    path: &entry.path,
8280                    char_bag,
8281                }
8282            } else {
8283                unreachable!()
8284            }
8285        })
8286    }
8287}
8288
8289impl Entity for Project {
8290    type Event = Event;
8291
8292    fn release(&mut self, cx: &mut gpui::AppContext) {
8293        match &self.client_state {
8294            Some(ProjectClientState::Local { .. }) => {
8295                let _ = self.unshare_internal(cx);
8296            }
8297            Some(ProjectClientState::Remote { remote_id, .. }) => {
8298                let _ = self.client.send(proto::LeaveProject {
8299                    project_id: *remote_id,
8300                });
8301                self.disconnected_from_host_internal(cx);
8302            }
8303            _ => {}
8304        }
8305    }
8306
8307    fn app_will_quit(
8308        &mut self,
8309        _: &mut AppContext,
8310    ) -> Option<std::pin::Pin<Box<dyn 'static + Future<Output = ()>>>> {
8311        let shutdown_futures = self
8312            .language_servers
8313            .drain()
8314            .map(|(_, server_state)| async {
8315                use LanguageServerState::*;
8316                match server_state {
8317                    Running { server, .. } => server.shutdown()?.await,
8318                    Starting(task) => task.await?.shutdown()?.await,
8319                }
8320            })
8321            .collect::<Vec<_>>();
8322
8323        Some(
8324            async move {
8325                futures::future::join_all(shutdown_futures).await;
8326            }
8327            .boxed(),
8328        )
8329    }
8330}
8331
8332impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
8333    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
8334        Self {
8335            worktree_id,
8336            path: path.as_ref().into(),
8337        }
8338    }
8339}
8340
8341impl ProjectLspAdapterDelegate {
8342    fn new(project: &Project, cx: &ModelContext<Project>) -> Arc<Self> {
8343        Arc::new(Self {
8344            project: cx.handle(),
8345            http_client: project.client.http_client(),
8346        })
8347    }
8348}
8349
8350impl LspAdapterDelegate for ProjectLspAdapterDelegate {
8351    fn show_notification(&self, message: &str, cx: &mut AppContext) {
8352        self.project
8353            .update(cx, |_, cx| cx.emit(Event::Notification(message.to_owned())));
8354    }
8355
8356    fn http_client(&self) -> Arc<dyn HttpClient> {
8357        self.http_client.clone()
8358    }
8359}
8360
8361fn serialize_symbol(symbol: &Symbol) -> proto::Symbol {
8362    proto::Symbol {
8363        language_server_name: symbol.language_server_name.0.to_string(),
8364        source_worktree_id: symbol.source_worktree_id.to_proto(),
8365        worktree_id: symbol.path.worktree_id.to_proto(),
8366        path: symbol.path.path.to_string_lossy().to_string(),
8367        name: symbol.name.clone(),
8368        kind: unsafe { mem::transmute(symbol.kind) },
8369        start: Some(proto::PointUtf16 {
8370            row: symbol.range.start.0.row,
8371            column: symbol.range.start.0.column,
8372        }),
8373        end: Some(proto::PointUtf16 {
8374            row: symbol.range.end.0.row,
8375            column: symbol.range.end.0.column,
8376        }),
8377        signature: symbol.signature.to_vec(),
8378    }
8379}
8380
8381fn relativize_path(base: &Path, path: &Path) -> PathBuf {
8382    let mut path_components = path.components();
8383    let mut base_components = base.components();
8384    let mut components: Vec<Component> = Vec::new();
8385    loop {
8386        match (path_components.next(), base_components.next()) {
8387            (None, None) => break,
8388            (Some(a), None) => {
8389                components.push(a);
8390                components.extend(path_components.by_ref());
8391                break;
8392            }
8393            (None, _) => components.push(Component::ParentDir),
8394            (Some(a), Some(b)) if components.is_empty() && a == b => (),
8395            (Some(a), Some(b)) if b == Component::CurDir => components.push(a),
8396            (Some(a), Some(_)) => {
8397                components.push(Component::ParentDir);
8398                for _ in base_components {
8399                    components.push(Component::ParentDir);
8400                }
8401                components.push(a);
8402                components.extend(path_components.by_ref());
8403                break;
8404            }
8405        }
8406    }
8407    components.iter().map(|c| c.as_os_str()).collect()
8408}
8409
8410impl Item for Buffer {
8411    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
8412        File::from_dyn(self.file()).and_then(|file| file.project_entry_id(cx))
8413    }
8414
8415    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
8416        File::from_dyn(self.file()).map(|file| ProjectPath {
8417            worktree_id: file.worktree_id(cx),
8418            path: file.path().clone(),
8419        })
8420    }
8421}
8422
8423async fn wait_for_loading_buffer(
8424    mut receiver: postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
8425) -> Result<ModelHandle<Buffer>, Arc<anyhow::Error>> {
8426    loop {
8427        if let Some(result) = receiver.borrow().as_ref() {
8428            match result {
8429                Ok(buffer) => return Ok(buffer.to_owned()),
8430                Err(e) => return Err(e.to_owned()),
8431            }
8432        }
8433        receiver.next().await;
8434    }
8435}
8436
8437fn include_text(server: &lsp::LanguageServer) -> bool {
8438    server
8439        .capabilities()
8440        .text_document_sync
8441        .as_ref()
8442        .and_then(|sync| match sync {
8443            lsp::TextDocumentSyncCapability::Kind(_) => None,
8444            lsp::TextDocumentSyncCapability::Options(options) => options.save.as_ref(),
8445        })
8446        .and_then(|save_options| match save_options {
8447            lsp::TextDocumentSyncSaveOptions::Supported(_) => None,
8448            lsp::TextDocumentSyncSaveOptions::SaveOptions(options) => options.include_text,
8449        })
8450        .unwrap_or(false)
8451}