Merge pull request #34 from zed-industries/buffer-per-inode

Max Brunsfeld created

Only open one buffer per inode, but associate each buffer view with its own path

Change summary

gpui/src/app.rs                        | 129 ++++++-
zed/src/editor/buffer/mod.rs           | 129 ++----
zed/src/editor/buffer_view.rs          | 131 +++---
zed/src/editor/display_map/fold_map.rs |  14 
zed/src/editor/display_map/mod.rs      |   4 
zed/src/file_finder.rs                 |  96 +++--
zed/src/workspace.rs                   | 475 +++++++++++++++++++++++----
zed/src/workspace/mod.rs               | 159 ---------
zed/src/workspace/workspace.rs         | 298 -----------------
zed/src/worktree.rs                    |  26 
10 files changed, 692 insertions(+), 769 deletions(-)

Detailed changes

gpui/src/app.rs 🔗

@@ -379,7 +379,8 @@ pub struct MutableAppContext {
     next_window_id: usize,
     next_task_id: usize,
     subscriptions: HashMap<usize, Vec<Subscription>>,
-    observations: HashMap<usize, Vec<Observation>>,
+    model_observations: HashMap<usize, Vec<ModelObservation>>,
+    view_observations: HashMap<usize, Vec<ViewObservation>>,
     async_observations: HashMap<usize, postage::broadcast::Sender<()>>,
     window_invalidations: HashMap<usize, WindowInvalidation>,
     presenters_and_platform_windows:
@@ -420,7 +421,8 @@ impl MutableAppContext {
             next_window_id: 0,
             next_task_id: 0,
             subscriptions: HashMap::new(),
-            observations: HashMap::new(),
+            model_observations: HashMap::new(),
+            view_observations: HashMap::new(),
             async_observations: HashMap::new(),
             window_invalidations: HashMap::new(),
             presenters_and_platform_windows: HashMap::new(),
@@ -871,13 +873,13 @@ impl MutableAppContext {
             for model_id in dropped_models {
                 self.ctx.models.remove(&model_id);
                 self.subscriptions.remove(&model_id);
-                self.observations.remove(&model_id);
+                self.model_observations.remove(&model_id);
                 self.async_observations.remove(&model_id);
             }
 
             for (window_id, view_id) in dropped_views {
                 self.subscriptions.remove(&view_id);
-                self.observations.remove(&view_id);
+                self.model_observations.remove(&view_id);
                 self.async_observations.remove(&view_id);
                 if let Some(window) = self.ctx.windows.get_mut(&window_id) {
                     self.window_invalidations
@@ -1004,11 +1006,11 @@ impl MutableAppContext {
     }
 
     fn notify_model_observers(&mut self, observed_id: usize) {
-        if let Some(observations) = self.observations.remove(&observed_id) {
+        if let Some(observations) = self.model_observations.remove(&observed_id) {
             if self.ctx.models.contains_key(&observed_id) {
                 for mut observation in observations {
                     let alive = match &mut observation {
-                        Observation::FromModel { model_id, callback } => {
+                        ModelObservation::FromModel { model_id, callback } => {
                             if let Some(mut model) = self.ctx.models.remove(model_id) {
                                 callback(model.as_any_mut(), observed_id, self, *model_id);
                                 self.ctx.models.insert(*model_id, model);
@@ -1017,7 +1019,7 @@ impl MutableAppContext {
                                 false
                             }
                         }
-                        Observation::FromView {
+                        ModelObservation::FromView {
                             window_id,
                             view_id,
                             callback,
@@ -1049,7 +1051,7 @@ impl MutableAppContext {
                     };
 
                     if alive {
-                        self.observations
+                        self.model_observations
                             .entry(observed_id)
                             .or_default()
                             .push(observation);
@@ -1072,6 +1074,44 @@ impl MutableAppContext {
             .updated
             .insert(view_id);
 
+        if let Some(observations) = self.view_observations.remove(&view_id) {
+            if self.ctx.models.contains_key(&view_id) {
+                for mut observation in observations {
+                    let alive = if let Some(mut view) = self
+                        .ctx
+                        .windows
+                        .get_mut(&observation.window_id)
+                        .and_then(|w| w.views.remove(&observation.view_id))
+                    {
+                        (observation.callback)(
+                            view.as_any_mut(),
+                            view_id,
+                            window_id,
+                            self,
+                            observation.window_id,
+                            observation.view_id,
+                        );
+                        self.ctx
+                            .windows
+                            .get_mut(&observation.window_id)
+                            .unwrap()
+                            .views
+                            .insert(observation.view_id, view);
+                        true
+                    } else {
+                        false
+                    };
+
+                    if alive {
+                        self.view_observations
+                            .entry(view_id)
+                            .or_default()
+                            .push(observation);
+                    }
+                }
+            }
+        }
+
         if let Entry::Occupied(mut entry) = self.async_observations.entry(view_id) {
             if entry.get_mut().blocking_send(()).is_err() {
                 entry.remove_entry();
@@ -1576,10 +1616,10 @@ impl<'a, T: Entity> ModelContext<'a, T> {
         F: 'static + FnMut(&mut T, ModelHandle<S>, &mut ModelContext<T>),
     {
         self.app
-            .observations
+            .model_observations
             .entry(handle.model_id)
             .or_default()
-            .push(Observation::FromModel {
+            .push(ModelObservation::FromModel {
                 model_id: self.model_id,
                 callback: Box::new(move |model, observed_id, app, model_id| {
                     let model = model.downcast_mut().expect("downcast is type safe");
@@ -1812,7 +1852,7 @@ impl<'a, T: View> ViewContext<'a, T> {
                 window_id: self.window_id,
                 view_id: self.view_id,
                 callback: Box::new(move |view, payload, app, window_id, view_id| {
-                    if let Some(emitter_handle) = emitter_handle.upgrade(app.as_ref()) {
+                    if let Some(emitter_handle) = emitter_handle.upgrade(&app) {
                         let model = view.downcast_mut().expect("downcast is type safe");
                         let payload = payload.downcast_ref().expect("downcast is type safe");
                         let mut ctx = ViewContext::new(app, window_id, view_id);
@@ -1829,16 +1869,16 @@ impl<'a, T: View> ViewContext<'a, T> {
         });
     }
 
-    pub fn observe<S, F>(&mut self, handle: &ModelHandle<S>, mut callback: F)
+    pub fn observe_model<S, F>(&mut self, handle: &ModelHandle<S>, mut callback: F)
     where
         S: Entity,
         F: 'static + FnMut(&mut T, ModelHandle<S>, &mut ViewContext<T>),
     {
         self.app
-            .observations
+            .model_observations
             .entry(handle.id())
             .or_default()
-            .push(Observation::FromView {
+            .push(ModelObservation::FromView {
                 window_id: self.window_id,
                 view_id: self.view_id,
                 callback: Box::new(move |view, observed_id, app, window_id, view_id| {
@@ -1850,6 +1890,38 @@ impl<'a, T: View> ViewContext<'a, T> {
             });
     }
 
+    pub fn observe_view<S, F>(&mut self, handle: &ViewHandle<S>, mut callback: F)
+    where
+        S: View,
+        F: 'static + FnMut(&mut T, ViewHandle<S>, &mut ViewContext<T>),
+    {
+        self.app
+            .view_observations
+            .entry(handle.id())
+            .or_default()
+            .push(ViewObservation {
+                window_id: self.window_id,
+                view_id: self.view_id,
+                callback: Box::new(
+                    move |view,
+                          observed_view_id,
+                          observed_window_id,
+                          app,
+                          observing_window_id,
+                          observing_view_id| {
+                        let view = view.downcast_mut().expect("downcast is type safe");
+                        let observed_handle = ViewHandle::new(
+                            observed_view_id,
+                            observed_window_id,
+                            &app.ctx.ref_counts,
+                        );
+                        let mut ctx = ViewContext::new(app, observing_window_id, observing_view_id);
+                        callback(view, observed_handle, &mut ctx);
+                    },
+                ),
+            });
+    }
+
     pub fn notify(&mut self) {
         self.app.notify_view(self.window_id, self.view_id);
     }
@@ -1918,6 +1990,12 @@ impl<'a, T: View> ViewContext<'a, T> {
     }
 }
 
+impl AsRef<AppContext> for &AppContext {
+    fn as_ref(&self) -> &AppContext {
+        self
+    }
+}
+
 impl<M> AsRef<AppContext> for ViewContext<'_, M> {
     fn as_ref(&self) -> &AppContext {
         &self.app.ctx
@@ -2346,8 +2424,9 @@ impl<T: View> WeakViewHandle<T> {
         }
     }
 
-    pub fn upgrade(&self, app: &AppContext) -> Option<ViewHandle<T>> {
-        if app
+    pub fn upgrade(&self, ctx: impl AsRef<AppContext>) -> Option<ViewHandle<T>> {
+        let ctx = ctx.as_ref();
+        if ctx
             .windows
             .get(&self.window_id)
             .and_then(|w| w.views.get(&self.view_id))
@@ -2356,7 +2435,7 @@ impl<T: View> WeakViewHandle<T> {
             Some(ViewHandle::new(
                 self.window_id,
                 self.view_id,
-                &app.ref_counts,
+                &ctx.ref_counts,
             ))
         } else {
             None
@@ -2496,7 +2575,7 @@ enum Subscription {
     },
 }
 
-enum Observation {
+enum ModelObservation {
     FromModel {
         model_id: usize,
         callback: Box<dyn FnMut(&mut dyn Any, usize, &mut MutableAppContext, usize)>,
@@ -2508,6 +2587,12 @@ enum Observation {
     },
 }
 
+struct ViewObservation {
+    window_id: usize,
+    view_id: usize,
+    callback: Box<dyn FnMut(&mut dyn Any, usize, usize, &mut MutableAppContext, usize, usize)>,
+}
+
 type FutureHandler = Box<dyn FnOnce(Box<dyn Any>, &mut MutableAppContext) -> Box<dyn Any>>;
 
 struct StreamHandler {
@@ -2639,7 +2724,7 @@ mod tests {
 
             assert_eq!(app.ctx.models.len(), 1);
             assert!(app.subscriptions.is_empty());
-            assert!(app.observations.is_empty());
+            assert!(app.model_observations.is_empty());
         });
     }
 
@@ -2842,7 +2927,7 @@ mod tests {
 
             assert_eq!(app.ctx.windows[&window_id].views.len(), 2);
             assert!(app.subscriptions.is_empty());
-            assert!(app.observations.is_empty());
+            assert!(app.model_observations.is_empty());
         })
     }
 
@@ -2988,7 +3073,7 @@ mod tests {
             let model = app.add_model(|_| Model::default());
 
             view.update(app, |_, c| {
-                c.observe(&model, |me, observed, c| {
+                c.observe_model(&model, |me, observed, c| {
                     me.events.push(observed.read(c).count)
                 });
             });
@@ -3032,7 +3117,7 @@ mod tests {
             let observed_model = app.add_model(|_| Model);
 
             observing_view.update(app, |_, ctx| {
-                ctx.observe(&observed_model, |_, _, _| {});
+                ctx.observe_model(&observed_model, |_, _, _| {});
             });
             observing_model.update(app, |_, ctx| {
                 ctx.observe(&observed_model, |_, _, _| {});

zed/src/editor/buffer/mod.rs 🔗

@@ -18,16 +18,14 @@ use crate::{
     worktree::FileHandle,
 };
 use anyhow::{anyhow, Result};
-use gpui::{AppContext, Entity, ModelContext};
+use gpui::{Entity, ModelContext};
 use lazy_static::lazy_static;
 use rand::prelude::*;
 use std::{
     cmp,
-    ffi::OsString,
     hash::BuildHasher,
     iter::{self, Iterator},
     ops::{AddAssign, Range},
-    path::Path,
     str,
     sync::Arc,
     time::{Duration, Instant},
@@ -59,7 +57,6 @@ type HashMap<K, V> = std::collections::HashMap<K, V>;
 type HashSet<T> = std::collections::HashSet<T>;
 
 pub struct Buffer {
-    file: Option<FileHandle>,
     fragments: SumTree<Fragment>,
     insertion_splits: HashMap<time::Local, SumTree<InsertionSplit>>,
     pub version: time::Global,
@@ -354,29 +351,15 @@ pub struct UndoOperation {
 }
 
 impl Buffer {
-    pub fn new<T: Into<Arc<str>>>(
-        replica_id: ReplicaId,
-        base_text: T,
-        ctx: &mut ModelContext<Self>,
-    ) -> Self {
-        Self::build(replica_id, None, History::new(base_text.into()), ctx)
+    pub fn new<T: Into<Arc<str>>>(replica_id: ReplicaId, base_text: T) -> Self {
+        Self::build(replica_id, History::new(base_text.into()))
     }
 
-    pub fn from_history(
-        replica_id: ReplicaId,
-        file: FileHandle,
-        history: History,
-        ctx: &mut ModelContext<Self>,
-    ) -> Self {
-        Self::build(replica_id, Some(file), history, ctx)
+    pub fn from_history(replica_id: ReplicaId, history: History) -> Self {
+        Self::build(replica_id, history)
     }
 
-    fn build(
-        replica_id: ReplicaId,
-        file: Option<FileHandle>,
-        history: History,
-        ctx: &mut ModelContext<Self>,
-    ) -> Self {
+    fn build(replica_id: ReplicaId, history: History) -> Self {
         let mut insertion_splits = HashMap::default();
         let mut fragments = SumTree::new();
 
@@ -425,12 +408,7 @@ impl Buffer {
             });
         }
 
-        if let Some(file) = file.as_ref() {
-            file.observe_from_model(ctx, |_, _, ctx| ctx.emit(Event::FileHandleChanged));
-        }
-
         Self {
-            file,
             fragments,
             insertion_splits,
             version: time::Global::new(),
@@ -448,41 +426,27 @@ impl Buffer {
         }
     }
 
-    pub fn file_name(&self, ctx: &AppContext) -> Option<OsString> {
-        self.file.as_ref().and_then(|file| file.file_name(ctx))
-    }
-
-    pub fn path(&self) -> Option<Arc<Path>> {
-        self.file.as_ref().map(|file| file.path())
-    }
-
-    pub fn entry_id(&self) -> Option<(usize, Arc<Path>)> {
-        self.file.as_ref().map(|file| file.entry_id())
-    }
-
     pub fn snapshot(&self) -> Snapshot {
         Snapshot {
             fragments: self.fragments.clone(),
         }
     }
 
-    pub fn save(&mut self, ctx: &mut ModelContext<Self>) -> LocalBoxFuture<'static, Result<()>> {
-        if let Some(file) = &self.file {
-            dbg!(file.path());
-
-            let snapshot = self.snapshot();
-            let version = self.version.clone();
-            let save_task = file.save(snapshot, ctx.as_ref());
-            let task = ctx.spawn(save_task, |me, save_result, ctx| {
-                if save_result.is_ok() {
-                    me.did_save(version, ctx);
-                }
-                save_result
-            });
-            Box::pin(task)
-        } else {
-            Box::pin(async { Ok(()) })
-        }
+    pub fn save(
+        &mut self,
+        file: &FileHandle,
+        ctx: &mut ModelContext<Self>,
+    ) -> LocalBoxFuture<'static, Result<()>> {
+        let snapshot = self.snapshot();
+        let version = self.version.clone();
+        let save_task = file.save(snapshot, ctx.as_ref());
+        let task = ctx.spawn(save_task, |me, save_result, ctx| {
+            if save_result.is_ok() {
+                me.did_save(version, ctx);
+            }
+            save_result
+        });
+        Box::pin(task)
     }
 
     fn did_save(&mut self, version: time::Global, ctx: &mut ModelContext<Buffer>) {
@@ -1763,7 +1727,6 @@ impl Buffer {
 impl Clone for Buffer {
     fn clone(&self) -> Self {
         Self {
-            file: self.file.clone(),
             fragments: self.fragments.clone(),
             insertion_splits: self.insertion_splits.clone(),
             version: self.version.clone(),
@@ -2333,8 +2296,8 @@ mod tests {
     #[test]
     fn test_edit() {
         App::test((), |ctx| {
-            ctx.add_model(|ctx| {
-                let mut buffer = Buffer::new(0, "abc", ctx);
+            ctx.add_model(|_| {
+                let mut buffer = Buffer::new(0, "abc");
                 assert_eq!(buffer.text(), "abc");
                 buffer.edit(vec![3..3], "def", None).unwrap();
                 assert_eq!(buffer.text(), "abcdef");
@@ -2358,8 +2321,8 @@ mod tests {
             let buffer_1_events = Rc::new(RefCell::new(Vec::new()));
             let buffer_2_events = Rc::new(RefCell::new(Vec::new()));
 
-            let buffer1 = app.add_model(|ctx| Buffer::new(0, "abcdef", ctx));
-            let buffer2 = app.add_model(|ctx| Buffer::new(1, "abcdef", ctx));
+            let buffer1 = app.add_model(|_| Buffer::new(0, "abcdef"));
+            let buffer2 = app.add_model(|_| Buffer::new(1, "abcdef"));
             let mut buffer_ops = Vec::new();
             buffer1.update(app, |buffer, ctx| {
                 let buffer_1_events = buffer_1_events.clone();
@@ -2445,8 +2408,8 @@ mod tests {
                 let mut reference_string = RandomCharIter::new(&mut rng)
                     .take(reference_string_len)
                     .collect::<String>();
-                ctx.add_model(|ctx| {
-                    let mut buffer = Buffer::new(0, reference_string.as_str(), ctx);
+                ctx.add_model(|_| {
+                    let mut buffer = Buffer::new(0, reference_string.as_str());
                     let mut buffer_versions = Vec::new();
                     for _i in 0..10 {
                         let (old_ranges, new_text, _) = buffer.randomly_mutate(rng, None);
@@ -2531,8 +2494,8 @@ mod tests {
     #[test]
     fn test_line_len() {
         App::test((), |ctx| {
-            ctx.add_model(|ctx| {
-                let mut buffer = Buffer::new(0, "", ctx);
+            ctx.add_model(|_| {
+                let mut buffer = Buffer::new(0, "");
                 buffer.edit(vec![0..0], "abcd\nefg\nhij", None).unwrap();
                 buffer.edit(vec![12..12], "kl\nmno", None).unwrap();
                 buffer.edit(vec![18..18], "\npqrs\n", None).unwrap();
@@ -2553,8 +2516,8 @@ mod tests {
     #[test]
     fn test_rightmost_point() {
         App::test((), |ctx| {
-            ctx.add_model(|ctx| {
-                let mut buffer = Buffer::new(0, "", ctx);
+            ctx.add_model(|_| {
+                let mut buffer = Buffer::new(0, "");
                 assert_eq!(buffer.rightmost_point().row, 0);
                 buffer.edit(vec![0..0], "abcd\nefg\nhij", None).unwrap();
                 assert_eq!(buffer.rightmost_point().row, 0);
@@ -2574,8 +2537,8 @@ mod tests {
     #[test]
     fn test_text_summary_for_range() {
         App::test((), |ctx| {
-            ctx.add_model(|ctx| {
-                let buffer = Buffer::new(0, "ab\nefg\nhklm\nnopqrs\ntuvwxyz", ctx);
+            ctx.add_model(|_| {
+                let buffer = Buffer::new(0, "ab\nefg\nhklm\nnopqrs\ntuvwxyz");
                 let text = Text::from(buffer.text());
                 assert_eq!(
                     buffer.text_summary_for_range(1..3),
@@ -2605,8 +2568,8 @@ mod tests {
     #[test]
     fn test_chars_at() {
         App::test((), |ctx| {
-            ctx.add_model(|ctx| {
-                let mut buffer = Buffer::new(0, "", ctx);
+            ctx.add_model(|_| {
+                let mut buffer = Buffer::new(0, "");
                 buffer.edit(vec![0..0], "abcd\nefgh\nij", None).unwrap();
                 buffer.edit(vec![12..12], "kl\nmno", None).unwrap();
                 buffer.edit(vec![18..18], "\npqrs", None).unwrap();
@@ -2628,7 +2591,7 @@ mod tests {
                 assert_eq!(chars.collect::<String>(), "PQrs");
 
                 // Regression test:
-                let mut buffer = Buffer::new(0, "", ctx);
+                let mut buffer = Buffer::new(0, "");
                 buffer.edit(vec![0..0], "[workspace]\nmembers = [\n    \"xray_core\",\n    \"xray_server\",\n    \"xray_cli\",\n    \"xray_wasm\",\n]\n", None).unwrap();
                 buffer.edit(vec![60..60], "\n", None).unwrap();
 
@@ -2757,8 +2720,8 @@ mod tests {
     #[test]
     fn test_anchors() {
         App::test((), |ctx| {
-            ctx.add_model(|ctx| {
-                let mut buffer = Buffer::new(0, "", ctx);
+            ctx.add_model(|_| {
+                let mut buffer = Buffer::new(0, "");
                 buffer.edit(vec![0..0], "abc", None).unwrap();
                 let left_anchor = buffer.anchor_before(2).unwrap();
                 let right_anchor = buffer.anchor_after(2).unwrap();
@@ -2922,8 +2885,8 @@ mod tests {
     #[test]
     fn test_anchors_at_start_and_end() {
         App::test((), |ctx| {
-            ctx.add_model(|ctx| {
-                let mut buffer = Buffer::new(0, "", ctx);
+            ctx.add_model(|_| {
+                let mut buffer = Buffer::new(0, "");
                 let before_start_anchor = buffer.anchor_before(0).unwrap();
                 let after_end_anchor = buffer.anchor_after(0).unwrap();
 
@@ -2950,7 +2913,7 @@ mod tests {
     #[test]
     fn test_is_modified() {
         App::test((), |app| {
-            let model = app.add_model(|ctx| Buffer::new(0, "abc", ctx));
+            let model = app.add_model(|_| Buffer::new(0, "abc"));
             let events = Rc::new(RefCell::new(Vec::new()));
 
             // initially, the buffer isn't dirty.
@@ -3037,8 +3000,8 @@ mod tests {
     #[test]
     fn test_undo_redo() {
         App::test((), |app| {
-            app.add_model(|ctx| {
-                let mut buffer = Buffer::new(0, "1234", ctx);
+            app.add_model(|_| {
+                let mut buffer = Buffer::new(0, "1234");
 
                 let edit1 = buffer.edit(vec![1..1], "abx", None).unwrap();
                 let edit2 = buffer.edit(vec![3..4], "yzef", None).unwrap();
@@ -3074,9 +3037,9 @@ mod tests {
     #[test]
     fn test_history() {
         App::test((), |app| {
-            app.add_model(|ctx| {
+            app.add_model(|_| {
                 let mut now = Instant::now();
-                let mut buffer = Buffer::new(0, "123456", ctx);
+                let mut buffer = Buffer::new(0, "123456");
 
                 let (set_id, _) = buffer
                     .add_selection_set(buffer.selections_from_ranges(vec![4..4]).unwrap(), None);
@@ -3161,7 +3124,7 @@ mod tests {
                 let mut network = Network::new();
                 for i in 0..PEERS {
                     let buffer =
-                        ctx.add_model(|ctx| Buffer::new(i as ReplicaId, base_text.as_str(), ctx));
+                        ctx.add_model(|_| Buffer::new(i as ReplicaId, base_text.as_str()));
                     buffers.push(buffer);
                     replica_ids.push(i as u16);
                     network.add_peer(i as u16);

zed/src/editor/buffer_view.rs 🔗

@@ -2,7 +2,7 @@ use super::{
     buffer, movement, Anchor, Bias, Buffer, BufferElement, DisplayMap, DisplayPoint, Point,
     Selection, SelectionSetId, ToOffset, ToPoint,
 };
-use crate::{settings::Settings, watch, workspace};
+use crate::{settings::Settings, watch, workspace, worktree::FileHandle};
 use anyhow::Result;
 use futures_core::future::LocalBoxFuture;
 use gpui::{
@@ -254,6 +254,7 @@ pub enum SelectAction {
 pub struct BufferView {
     handle: WeakViewHandle<Self>,
     buffer: ModelHandle<Buffer>,
+    file: Option<FileHandle>,
     display_map: ModelHandle<DisplayMap>,
     selection_set_id: SelectionSetId,
     pending_selection: Option<Selection>,
@@ -275,20 +276,25 @@ struct ClipboardSelection {
 
 impl BufferView {
     pub fn single_line(settings: watch::Receiver<Settings>, ctx: &mut ViewContext<Self>) -> Self {
-        let buffer = ctx.add_model(|ctx| Buffer::new(0, String::new(), ctx));
-        let mut view = Self::for_buffer(buffer, settings, ctx);
+        let buffer = ctx.add_model(|_| Buffer::new(0, String::new()));
+        let mut view = Self::for_buffer(buffer, None, settings, ctx);
         view.single_line = true;
         view
     }
 
     pub fn for_buffer(
         buffer: ModelHandle<Buffer>,
+        file: Option<FileHandle>,
         settings: watch::Receiver<Settings>,
         ctx: &mut ViewContext<Self>,
     ) -> Self {
         settings.notify_view_on_change(ctx);
 
-        ctx.observe(&buffer, Self::on_buffer_changed);
+        if let Some(file) = file.as_ref() {
+            file.observe_from_view(ctx, |_, _, ctx| ctx.emit(Event::FileHandleChanged));
+        }
+
+        ctx.observe_model(&buffer, Self::on_buffer_changed);
         ctx.subscribe_to_model(&buffer, Self::on_buffer_event);
         let display_map = ctx.add_model(|ctx| {
             DisplayMap::new(
@@ -297,7 +303,7 @@ impl BufferView {
                 ctx,
             )
         });
-        ctx.observe(&display_map, Self::on_display_map_changed);
+        ctx.observe_model(&display_map, Self::on_display_map_changed);
 
         let (selection_set_id, _) = buffer.update(ctx, |buffer, ctx| {
             buffer.add_selection_set(
@@ -313,6 +319,7 @@ impl BufferView {
         Self {
             handle: ctx.handle().downgrade(),
             buffer,
+            file,
             display_map,
             selection_set_id,
             pending_selection: None,
@@ -577,7 +584,7 @@ impl BufferView {
         Ok(())
     }
 
-    fn insert(&mut self, text: &String, ctx: &mut ViewContext<Self>) {
+    pub fn insert(&mut self, text: &String, ctx: &mut ViewContext<Self>) {
         let mut offset_ranges = SmallVec::<[Range<usize>; 32]>::new();
         {
             let buffer = self.buffer.read(ctx);
@@ -2089,18 +2096,6 @@ impl View for BufferView {
     }
 }
 
-impl workspace::Item for Buffer {
-    type View = BufferView;
-
-    fn build_view(
-        buffer: ModelHandle<Self>,
-        settings: watch::Receiver<Settings>,
-        ctx: &mut ViewContext<Self::View>,
-    ) -> Self::View {
-        BufferView::for_buffer(buffer, settings, ctx)
-    }
-}
-
 impl workspace::ItemView for BufferView {
     fn should_activate_item_on_event(event: &Self::Event) -> bool {
         matches!(event, Event::Activate)
@@ -2114,28 +2109,39 @@ impl workspace::ItemView for BufferView {
     }
 
     fn title(&self, app: &AppContext) -> std::string::String {
-        if let Some(name) = self.buffer.read(app).file_name(app) {
+        let filename = self.file.as_ref().and_then(|file| file.file_name(app));
+        if let Some(name) = filename {
             name.to_string_lossy().into()
         } else {
             "untitled".into()
         }
     }
 
-    fn entry_id(&self, app: &AppContext) -> Option<(usize, Arc<Path>)> {
-        self.buffer.read(app).entry_id()
+    fn entry_id(&self, _: &AppContext) -> Option<(usize, Arc<Path>)> {
+        self.file.as_ref().map(|file| file.entry_id())
     }
 
     fn clone_on_split(&self, ctx: &mut ViewContext<Self>) -> Option<Self>
     where
         Self: Sized,
     {
-        let clone = BufferView::for_buffer(self.buffer.clone(), self.settings.clone(), ctx);
+        let clone = BufferView::for_buffer(
+            self.buffer.clone(),
+            self.file.clone(),
+            self.settings.clone(),
+            ctx,
+        );
         *clone.scroll_position.lock() = *self.scroll_position.lock();
         Some(clone)
     }
 
     fn save(&self, ctx: &mut ViewContext<Self>) -> LocalBoxFuture<'static, Result<()>> {
-        self.buffer.update(ctx, |buffer, ctx| buffer.save(ctx))
+        if let Some(file) = self.file.as_ref() {
+            self.buffer
+                .update(ctx, |buffer, ctx| buffer.save(file, ctx))
+        } else {
+            Box::pin(async { Ok(()) })
+        }
     }
 
     fn is_dirty(&self, ctx: &AppContext) -> bool {
@@ -2153,11 +2159,10 @@ mod tests {
     #[test]
     fn test_selection_with_mouse() {
         App::test((), |app| {
-            let buffer =
-                app.add_model(|ctx| Buffer::new(0, "aaaaaa\nbbbbbb\ncccccc\ndddddd\n", ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "aaaaaa\nbbbbbb\ncccccc\ndddddd\n"));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let (_, buffer_view) =
-                app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
 
             buffer_view.update(app, |view, ctx| {
                 view.begin_selection(DisplayPoint::new(2, 2), false, ctx);
@@ -2268,11 +2273,11 @@ mod tests {
             let layout_cache = TextLayoutCache::new(app.platform().fonts());
             let font_cache = app.font_cache().clone();
 
-            let buffer = app.add_model(|ctx| Buffer::new(0, sample_text(6, 6), ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, sample_text(6, 6)));
 
             let settings = settings::channel(&font_cache).unwrap().1;
             let (_, view) =
-                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), settings, ctx));
+                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), None, settings, ctx));
 
             let layouts = view
                 .read(app)
@@ -2285,7 +2290,7 @@ mod tests {
     #[test]
     fn test_fold() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| {
+            let buffer = app.add_model(|_| {
                 Buffer::new(
                     0,
                     "
@@ -2306,12 +2311,11 @@ mod tests {
                     }
                 "
                     .unindent(),
-                    ctx,
                 )
             });
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let (_, view) =
-                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), settings, ctx));
+                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), None, settings, ctx));
 
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
@@ -2380,10 +2384,10 @@ mod tests {
     #[test]
     fn test_move_cursor() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, sample_text(6, 6), ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, sample_text(6, 6)));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let (_, view) =
-                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), settings, ctx));
+                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), None, settings, ctx));
 
             buffer.update(app, |buffer, ctx| {
                 buffer
@@ -2458,9 +2462,10 @@ mod tests {
     #[test]
     fn test_beginning_end_of_line() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, "abc\n  def", ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "abc\n  def"));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let (_, view) = app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+            let (_, view) =
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
                     &[
@@ -2586,10 +2591,11 @@ mod tests {
     #[test]
     fn test_prev_next_word_boundary() {
         App::test((), |app| {
-            let buffer = app
-                .add_model(|ctx| Buffer::new(0, "use std::str::{foo, bar}\n\n  {baz.qux()}", ctx));
+            let buffer =
+                app.add_model(|_| Buffer::new(0, "use std::str::{foo, bar}\n\n  {baz.qux()}"));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let (_, view) = app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+            let (_, view) =
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
                     &[
@@ -2768,16 +2774,12 @@ mod tests {
     #[test]
     fn test_backspace() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| {
-                Buffer::new(
-                    0,
-                    "one two three\nfour five six\nseven eight nine\nten\n",
-                    ctx,
-                )
+            let buffer = app.add_model(|_| {
+                Buffer::new(0, "one two three\nfour five six\nseven eight nine\nten\n")
             });
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let (_, view) =
-                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), settings, ctx));
+                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), None, settings, ctx));
 
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
@@ -2805,16 +2807,12 @@ mod tests {
     #[test]
     fn test_delete() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| {
-                Buffer::new(
-                    0,
-                    "one two three\nfour five six\nseven eight nine\nten\n",
-                    ctx,
-                )
+            let buffer = app.add_model(|_| {
+                Buffer::new(0, "one two three\nfour five six\nseven eight nine\nten\n")
             });
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let (_, view) =
-                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), settings, ctx));
+                app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), None, settings, ctx));
 
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
@@ -2843,8 +2841,9 @@ mod tests {
     fn test_delete_line() {
         App::test((), |app| {
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let buffer = app.add_model(|ctx| Buffer::new(0, "abc\ndef\nghi\n", ctx));
-            let (_, view) = app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "abc\ndef\nghi\n"));
+            let (_, view) =
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
                     &[
@@ -2867,8 +2866,9 @@ mod tests {
             );
 
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let buffer = app.add_model(|ctx| Buffer::new(0, "abc\ndef\nghi\n", ctx));
-            let (_, view) = app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "abc\ndef\nghi\n"));
+            let (_, view) =
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
                     &[DisplayPoint::new(2, 0)..DisplayPoint::new(0, 1)],
@@ -2889,8 +2889,9 @@ mod tests {
     fn test_duplicate_line() {
         App::test((), |app| {
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let buffer = app.add_model(|ctx| Buffer::new(0, "abc\ndef\nghi\n", ctx));
-            let (_, view) = app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "abc\ndef\nghi\n"));
+            let (_, view) =
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
                     &[
@@ -2919,8 +2920,9 @@ mod tests {
             );
 
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let buffer = app.add_model(|ctx| Buffer::new(0, "abc\ndef\nghi\n", ctx));
-            let (_, view) = app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "abc\ndef\nghi\n"));
+            let (_, view) =
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
             view.update(app, |view, ctx| {
                 view.select_display_ranges(
                     &[
@@ -2949,10 +2951,10 @@ mod tests {
     #[test]
     fn test_clipboard() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, "one two three four five six ", ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "one two three four five six "));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let view = app
-                .add_window(|ctx| BufferView::for_buffer(buffer.clone(), settings, ctx))
+                .add_window(|ctx| BufferView::for_buffer(buffer.clone(), None, settings, ctx))
                 .1;
 
             // Cut with three selections. Clipboard text is divided into three slices.
@@ -3090,9 +3092,10 @@ mod tests {
     #[test]
     fn test_select_all() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, "abc\nde\nfgh", ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "abc\nde\nfgh"));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let (_, view) = app.add_window(|ctx| BufferView::for_buffer(buffer, settings, ctx));
+            let (_, view) =
+                app.add_window(|ctx| BufferView::for_buffer(buffer, None, settings, ctx));
             view.update(app, |b, ctx| b.select_all(&(), ctx));
             assert_eq!(
                 view.read(app).selection_ranges(app.as_ref()),

zed/src/editor/display_map/fold_map.rs 🔗

@@ -505,7 +505,7 @@ mod tests {
     #[test]
     fn test_basic_folds() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, sample_text(5, 6), ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, sample_text(5, 6)));
             let mut map = FoldMap::new(buffer.clone(), app.as_ref());
 
             map.fold(
@@ -556,7 +556,7 @@ mod tests {
     #[test]
     fn test_adjacent_folds() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, "abcdefghijkl", ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "abcdefghijkl"));
 
             {
                 let mut map = FoldMap::new(buffer.clone(), app.as_ref());
@@ -600,7 +600,7 @@ mod tests {
     #[test]
     fn test_overlapping_folds() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, sample_text(5, 6), ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, sample_text(5, 6)));
             let mut map = FoldMap::new(buffer.clone(), app.as_ref());
             map.fold(
                 vec![
@@ -619,7 +619,7 @@ mod tests {
     #[test]
     fn test_merging_folds_via_edit() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, sample_text(5, 6), ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, sample_text(5, 6)));
             let mut map = FoldMap::new(buffer.clone(), app.as_ref());
 
             map.fold(
@@ -670,10 +670,10 @@ mod tests {
             let mut rng = StdRng::seed_from_u64(seed);
 
             App::test((), |app| {
-                let buffer = app.add_model(|ctx| {
+                let buffer = app.add_model(|_| {
                     let len = rng.gen_range(0..10);
                     let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
-                    Buffer::new(0, text, ctx)
+                    Buffer::new(0, text)
                 });
                 let mut map = FoldMap::new(buffer.clone(), app.as_ref());
 
@@ -749,7 +749,7 @@ mod tests {
     fn test_buffer_rows() {
         App::test((), |app| {
             let text = sample_text(6, 6) + "\n";
-            let buffer = app.add_model(|ctx| Buffer::new(0, text, ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, text));
 
             let mut map = FoldMap::new(buffer.clone(), app.as_ref());
 

zed/src/editor/display_map/mod.rs 🔗

@@ -324,7 +324,7 @@ mod tests {
     fn test_chars_at() {
         App::test((), |app| {
             let text = sample_text(6, 6);
-            let buffer = app.add_model(|ctx| Buffer::new(0, text, ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, text));
             let map = app.add_model(|ctx| DisplayMap::new(buffer.clone(), 4, ctx));
             buffer
                 .update(app, |buffer, ctx| {
@@ -391,7 +391,7 @@ mod tests {
     #[test]
     fn test_max_point() {
         App::test((), |app| {
-            let buffer = app.add_model(|ctx| Buffer::new(0, "aaa\n\t\tbbb", ctx));
+            let buffer = app.add_model(|_| Buffer::new(0, "aaa\n\t\tbbb"));
             let map = app.add_model(|ctx| DisplayMap::new(buffer.clone(), 4, ctx));
             assert_eq!(
                 map.read(app).max_point(app.as_ref()),

zed/src/file_finder.rs 🔗

@@ -2,7 +2,7 @@ use crate::{
     editor::{buffer_view, BufferView},
     settings::Settings,
     util, watch,
-    workspace::{Workspace, WorkspaceView},
+    workspace::Workspace,
     worktree::{match_paths, PathMatch, Worktree},
 };
 use gpui::{
@@ -11,8 +11,8 @@ use gpui::{
     fonts::{Properties, Weight},
     geometry::vector::vec2f,
     keymap::{self, Binding},
-    AppContext, Axis, Border, Entity, ModelHandle, MutableAppContext, View, ViewContext,
-    ViewHandle, WeakViewHandle,
+    AppContext, Axis, Border, Entity, MutableAppContext, View, ViewContext, ViewHandle,
+    WeakViewHandle,
 };
 use std::{
     cmp,
@@ -26,7 +26,7 @@ use std::{
 pub struct FileFinder {
     handle: WeakViewHandle<Self>,
     settings: watch::Receiver<Settings>,
-    workspace: ModelHandle<Workspace>,
+    workspace: WeakViewHandle<Workspace>,
     query_buffer: ViewHandle<BufferView>,
     search_count: usize,
     latest_search_id: usize,
@@ -253,25 +253,21 @@ impl FileFinder {
         })
     }
 
-    fn toggle(workspace_view: &mut WorkspaceView, _: &(), ctx: &mut ViewContext<WorkspaceView>) {
+    fn toggle(workspace_view: &mut Workspace, _: &(), ctx: &mut ViewContext<Workspace>) {
         workspace_view.toggle_modal(ctx, |ctx, workspace_view| {
-            let handle = ctx.add_view(|ctx| {
-                Self::new(
-                    workspace_view.settings.clone(),
-                    workspace_view.workspace.clone(),
-                    ctx,
-                )
-            });
-            ctx.subscribe_to_view(&handle, Self::on_event);
-            handle
+            let workspace = ctx.handle();
+            let finder =
+                ctx.add_view(|ctx| Self::new(workspace_view.settings.clone(), workspace, ctx));
+            ctx.subscribe_to_view(&finder, Self::on_event);
+            finder
         });
     }
 
     fn on_event(
-        workspace_view: &mut WorkspaceView,
+        workspace_view: &mut Workspace,
         _: ViewHandle<FileFinder>,
         event: &Event,
-        ctx: &mut ViewContext<WorkspaceView>,
+        ctx: &mut ViewContext<Workspace>,
     ) {
         match event {
             Event::Selected(tree_id, path) => {
@@ -288,10 +284,10 @@ impl FileFinder {
 
     pub fn new(
         settings: watch::Receiver<Settings>,
-        workspace: ModelHandle<Workspace>,
+        workspace: ViewHandle<Workspace>,
         ctx: &mut ViewContext<Self>,
     ) -> Self {
-        ctx.observe(&workspace, Self::workspace_updated);
+        ctx.observe_view(&workspace, Self::workspace_updated);
 
         let query_buffer = ctx.add_view(|ctx| BufferView::single_line(settings.clone(), ctx));
         ctx.subscribe_to_view(&query_buffer, Self::on_query_buffer_event);
@@ -301,7 +297,7 @@ impl FileFinder {
         Self {
             handle: ctx.handle().downgrade(),
             settings,
-            workspace,
+            workspace: workspace.downgrade(),
             query_buffer,
             search_count: 0,
             latest_search_id: 0,
@@ -314,7 +310,7 @@ impl FileFinder {
         }
     }
 
-    fn workspace_updated(&mut self, _: ModelHandle<Workspace>, ctx: &mut ViewContext<Self>) {
+    fn workspace_updated(&mut self, _: ViewHandle<Workspace>, ctx: &mut ViewContext<Self>) {
         self.spawn_search(self.query_buffer.read(ctx).text(ctx.as_ref()), ctx);
     }
 
@@ -390,9 +386,10 @@ impl FileFinder {
         ctx.emit(Event::Selected(*tree_id, path.clone()));
     }
 
-    fn spawn_search(&mut self, query: String, ctx: &mut ViewContext<Self>) {
+    fn spawn_search(&mut self, query: String, ctx: &mut ViewContext<Self>) -> Option<()> {
         let snapshots = self
             .workspace
+            .upgrade(&ctx)?
             .read(ctx)
             .worktrees()
             .iter()
@@ -420,6 +417,8 @@ impl FileFinder {
         });
 
         ctx.spawn(task, Self::update_matches).detach();
+
+        Some(())
     }
 
     fn update_matches(
@@ -443,6 +442,7 @@ impl FileFinder {
 
     fn worktree<'a>(&'a self, tree_id: usize, app: &'a AppContext) -> Option<&'a Worktree> {
         self.workspace
+            .upgrade(app)?
             .read(app)
             .worktrees()
             .get(&tree_id)
@@ -453,11 +453,7 @@ impl FileFinder {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::{
-        editor, settings,
-        test::temp_tree,
-        workspace::{Workspace, WorkspaceView},
-    };
+    use crate::{editor, settings, test::temp_tree, workspace::Workspace};
     use gpui::App;
     use serde_json::json;
     use std::fs;
@@ -476,20 +472,22 @@ mod tests {
             });
 
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let workspace = app.add_model(|ctx| Workspace::new(vec![tmp_dir.path().into()], ctx));
-            let (window_id, workspace_view) =
-                app.add_window(|ctx| WorkspaceView::new(workspace.clone(), settings, ctx));
+            let (window_id, workspace) = app.add_window(|ctx| {
+                let mut workspace = Workspace::new(0, settings, ctx);
+                workspace.add_worktree(tmp_dir.path(), ctx);
+                workspace
+            });
             app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
                 .await;
             app.dispatch_action(
                 window_id,
-                vec![workspace_view.id()],
+                vec![workspace.id()],
                 "file_finder:toggle".into(),
                 (),
             );
 
             let finder = app.read(|ctx| {
-                workspace_view
+                workspace
                     .read(ctx)
                     .modal()
                     .cloned()
@@ -507,16 +505,16 @@ mod tests {
                 .condition(&app, |finder, _| finder.matches.len() == 2)
                 .await;
 
-            let active_pane = app.read(|ctx| workspace_view.read(ctx).active_pane().clone());
+            let active_pane = app.read(|ctx| workspace.read(ctx).active_pane().clone());
             app.dispatch_action(
                 window_id,
-                vec![workspace_view.id(), finder.id()],
+                vec![workspace.id(), finder.id()],
                 "menu:select_next",
                 (),
             );
             app.dispatch_action(
                 window_id,
-                vec![workspace_view.id(), finder.id()],
+                vec![workspace.id(), finder.id()],
                 "file_finder:confirm",
                 (),
             );
@@ -543,7 +541,11 @@ mod tests {
                 "hiccup": "",
             }));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let workspace = app.add_model(|ctx| Workspace::new(vec![tmp_dir.path().into()], ctx));
+            let (_, workspace) = app.add_window(|ctx| {
+                let mut workspace = Workspace::new(0, settings.clone(), ctx);
+                workspace.add_worktree(tmp_dir.path(), ctx);
+                workspace
+            });
             app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
                 .await;
             let (_, finder) =
@@ -596,7 +598,11 @@ mod tests {
             fs::write(&file_path, "").unwrap();
 
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let workspace = app.add_model(|ctx| Workspace::new(vec![file_path], ctx));
+            let (_, workspace) = app.add_window(|ctx| {
+                let mut workspace = Workspace::new(0, settings.clone(), ctx);
+                workspace.add_worktree(&file_path, ctx);
+                workspace
+            });
             app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
                 .await;
             let (_, finder) =
@@ -633,14 +639,20 @@ mod tests {
                 "dir2": { "a.txt": "" }
             }));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let workspace = app.add_model(|ctx| {
-                Workspace::new(
-                    vec![tmp_dir.path().join("dir1"), tmp_dir.path().join("dir2")],
-                    ctx,
-                )
-            });
+
+            let (_, workspace) = app.add_window(|ctx| Workspace::new(0, settings.clone(), ctx));
+
+            workspace
+                .update(&mut app, |workspace, ctx| {
+                    workspace.open_paths(
+                        &[tmp_dir.path().join("dir1"), tmp_dir.path().join("dir2")],
+                        ctx,
+                    )
+                })
+                .await;
             app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
                 .await;
+
             let (_, finder) =
                 app.add_window(|ctx| FileFinder::new(settings, workspace.clone(), ctx));
 

zed/src/workspace/workspace_view.rs → zed/src/workspace.rs 🔗

@@ -1,25 +1,99 @@
-use super::{pane, Pane, PaneGroup, SplitDirection, Workspace};
-use crate::{settings::Settings, watch};
+pub mod pane;
+pub mod pane_group;
+pub use pane::*;
+pub use pane_group::*;
+
+use crate::{
+    settings::Settings,
+    watch::{self, Receiver},
+};
+use gpui::{MutableAppContext, PathPromptOptions};
+use std::path::PathBuf;
+pub fn init(app: &mut MutableAppContext) {
+    app.add_global_action("workspace:open", open);
+    app.add_global_action("workspace:open_paths", open_paths);
+    app.add_global_action("app:quit", quit);
+    app.add_action("workspace:save", Workspace::save_active_item);
+    app.add_action("workspace:debug_elements", Workspace::debug_elements);
+    app.add_bindings(vec![
+        Binding::new("cmd-s", "workspace:save", None),
+        Binding::new("cmd-alt-i", "workspace:debug_elements", None),
+    ]);
+    pane::init(app);
+}
+use crate::{
+    editor::{Buffer, BufferView},
+    time::ReplicaId,
+    worktree::{Worktree, WorktreeHandle},
+};
 use futures_core::{future::LocalBoxFuture, Future};
 use gpui::{
     color::rgbu, elements::*, json::to_string_pretty, keymap::Binding, AnyViewHandle, AppContext,
-    ClipboardItem, Entity, EntityTask, ModelHandle, MutableAppContext, View, ViewContext,
-    ViewHandle,
+    ClipboardItem, Entity, EntityTask, ModelHandle, View, ViewContext, ViewHandle,
 };
 use log::error;
+use smol::prelude::*;
 use std::{
-    collections::HashSet,
-    path::{Path, PathBuf},
+    collections::{hash_map::Entry, HashMap, HashSet},
+    path::Path,
     sync::Arc,
 };
 
-pub fn init(app: &mut MutableAppContext) {
-    app.add_action("workspace:save", WorkspaceView::save_active_item);
-    app.add_action("workspace:debug_elements", WorkspaceView::debug_elements);
-    app.add_bindings(vec![
-        Binding::new("cmd-s", "workspace:save", None),
-        Binding::new("cmd-alt-i", "workspace:debug_elements", None),
-    ]);
+pub struct OpenParams {
+    pub paths: Vec<PathBuf>,
+    pub settings: watch::Receiver<Settings>,
+}
+
+fn open(settings: &Receiver<Settings>, ctx: &mut MutableAppContext) {
+    let settings = settings.clone();
+    ctx.prompt_for_paths(
+        PathPromptOptions {
+            files: true,
+            directories: true,
+            multiple: true,
+        },
+        move |paths, ctx| {
+            if let Some(paths) = paths {
+                ctx.dispatch_global_action("workspace:open_paths", OpenParams { paths, settings });
+            }
+        },
+    );
+}
+
+fn open_paths(params: &OpenParams, app: &mut MutableAppContext) {
+    log::info!("open paths {:?}", params.paths);
+
+    // Open paths in existing workspace if possible
+    for window_id in app.window_ids().collect::<Vec<_>>() {
+        if let Some(handle) = app.root_view::<Workspace>(window_id) {
+            if handle.update(app, |view, ctx| {
+                if view.contains_paths(&params.paths, ctx.as_ref()) {
+                    let open_paths = view.open_paths(&params.paths, ctx);
+                    ctx.foreground().spawn(open_paths).detach();
+                    log::info!("open paths on existing workspace");
+                    true
+                } else {
+                    false
+                }
+            }) {
+                return;
+            }
+        }
+    }
+
+    log::info!("open new workspace");
+
+    // Add a new workspace if necessary
+    app.add_window(|ctx| {
+        let mut view = Workspace::new(0, params.settings.clone(), ctx);
+        let open_paths = view.open_paths(&params.paths, ctx);
+        ctx.foreground().spawn(open_paths).detach();
+        view
+    });
+}
+
+fn quit(_: &(), app: &mut MutableAppContext) {
+    app.platform().quit();
 }
 
 pub trait ItemView: View {
@@ -122,24 +196,27 @@ pub struct State {
     pub center: PaneGroup,
 }
 
-pub struct WorkspaceView {
-    pub workspace: ModelHandle<Workspace>,
+pub struct Workspace {
     pub settings: watch::Receiver<Settings>,
     modal: Option<AnyViewHandle>,
     center: PaneGroup,
     panes: Vec<ViewHandle<Pane>>,
     active_pane: ViewHandle<Pane>,
     loading_entries: HashSet<(usize, Arc<Path>)>,
+    replica_id: ReplicaId,
+    worktrees: HashSet<ModelHandle<Worktree>>,
+    buffers: HashMap<
+        (usize, u64),
+        postage::watch::Receiver<Option<Result<ModelHandle<Buffer>, Arc<anyhow::Error>>>>,
+    >,
 }
 
-impl WorkspaceView {
+impl Workspace {
     pub fn new(
-        workspace: ModelHandle<Workspace>,
+        replica_id: ReplicaId,
         settings: watch::Receiver<Settings>,
         ctx: &mut ViewContext<Self>,
     ) -> Self {
-        ctx.observe(&workspace, Self::workspace_updated);
-
         let pane = ctx.add_view(|_| Pane::new(settings.clone()));
         let pane_id = pane.id();
         ctx.subscribe_to_view(&pane, move |me, _, event, ctx| {
@@ -147,29 +224,65 @@ impl WorkspaceView {
         });
         ctx.focus(&pane);
 
-        WorkspaceView {
-            workspace,
+        Workspace {
             modal: None,
             center: PaneGroup::new(pane.id()),
             panes: vec![pane.clone()],
             active_pane: pane.clone(),
             loading_entries: HashSet::new(),
             settings,
+            replica_id,
+            worktrees: Default::default(),
+            buffers: Default::default(),
         }
     }
 
+    pub fn worktrees(&self) -> &HashSet<ModelHandle<Worktree>> {
+        &self.worktrees
+    }
+
     pub fn contains_paths(&self, paths: &[PathBuf], app: &AppContext) -> bool {
-        self.workspace.read(app).contains_paths(paths, app)
+        paths.iter().all(|path| self.contains_path(&path, app))
+    }
+
+    pub fn contains_path(&self, path: &Path, app: &AppContext) -> bool {
+        self.worktrees
+            .iter()
+            .any(|worktree| worktree.read(app).contains_abs_path(path))
+    }
+
+    pub fn worktree_scans_complete(&self, ctx: &AppContext) -> impl Future<Output = ()> + 'static {
+        let futures = self
+            .worktrees
+            .iter()
+            .map(|worktree| worktree.read(ctx).scan_complete())
+            .collect::<Vec<_>>();
+        async move {
+            for future in futures {
+                future.await;
+            }
+        }
     }
 
     pub fn open_paths(
-        &self,
+        &mut self,
         paths: &[PathBuf],
         ctx: &mut ViewContext<Self>,
     ) -> impl Future<Output = ()> {
-        let entries = self
-            .workspace
-            .update(ctx, |workspace, ctx| workspace.open_paths(paths, ctx));
+        let entries = paths
+            .iter()
+            .cloned()
+            .map(|path| {
+                for tree in self.worktrees.iter() {
+                    if let Ok(relative_path) = path.strip_prefix(tree.read(ctx).abs_path()) {
+                        return (tree.id(), relative_path.into());
+                    }
+                }
+                let worktree_id = self.add_worktree(&path, ctx);
+                (worktree_id, Path::new("").into())
+            })
+            .collect::<Vec<_>>();
+
         let bg = ctx.background_executor().clone();
         let tasks = paths
             .iter()
@@ -197,6 +310,15 @@ impl WorkspaceView {
         }
     }
 
+    pub fn add_worktree(&mut self, path: &Path, ctx: &mut ViewContext<Self>) -> usize {
+        let worktree = ctx.add_model(|ctx| Worktree::new(path, ctx));
+        let worktree_id = worktree.id();
+        ctx.observe_model(&worktree, |_, _, ctx| ctx.notify());
+        self.worktrees.insert(worktree);
+        ctx.notify();
+        worktree_id
+    }
+
     pub fn toggle_modal<V, F>(&mut self, ctx: &mut ViewContext<Self>, add_view: F)
     where
         V: 'static + View,
@@ -241,31 +363,81 @@ impl WorkspaceView {
             return None;
         }
 
-        self.loading_entries.insert(entry.clone());
+        let (worktree_id, path) = entry.clone();
 
-        match self.workspace.update(ctx, |workspace, ctx| {
-            workspace.open_entry(entry.clone(), ctx)
-        }) {
-            Err(error) => {
-                error!("{}", error);
-                None
+        let worktree = match self.worktrees.get(&worktree_id).cloned() {
+            Some(worktree) => worktree,
+            None => {
+                log::error!("worktree {} does not exist", worktree_id);
+                return None;
             }
-            Ok(item) => {
-                let settings = self.settings.clone();
-                Some(ctx.spawn(item, move |me, item, ctx| {
-                    me.loading_entries.remove(&entry);
-                    match item {
-                        Ok(item) => {
-                            let item_view = item.add_view(ctx.window_id(), settings, ctx.as_mut());
-                            me.add_item(item_view, ctx);
-                        }
-                        Err(error) => {
-                            error!("{}", error);
-                        }
-                    }
-                }))
+        };
+
+        let inode = match worktree.read(ctx).inode_for_path(&path) {
+            Some(inode) => inode,
+            None => {
+                log::error!("path {:?} does not exist", path);
+                return None;
             }
+        };
+
+        let file = match worktree.file(path.clone(), ctx.as_ref()) {
+            Some(file) => file,
+            None => {
+                log::error!("path {:?} does not exist", path);
+                return None;
+            }
+        };
+
+        self.loading_entries.insert(entry.clone());
+
+        if let Entry::Vacant(entry) = self.buffers.entry((worktree_id, inode)) {
+            let (mut tx, rx) = postage::watch::channel();
+            entry.insert(rx);
+            let history = file.load_history(ctx.as_ref());
+            let replica_id = self.replica_id;
+            let buffer = ctx
+                .background_executor()
+                .spawn(async move { Ok(Buffer::from_history(replica_id, history.await?)) });
+            ctx.spawn(buffer, move |_, from_history_result, ctx| {
+                *tx.borrow_mut() = Some(match from_history_result {
+                    Ok(buffer) => Ok(ctx.add_model(|_| buffer)),
+                    Err(error) => Err(Arc::new(error)),
+                })
+            })
+            .detach()
         }
+
+        let mut watch = self.buffers.get(&(worktree_id, inode)).unwrap().clone();
+        Some(ctx.spawn(
+            async move {
+                loop {
+                    if let Some(load_result) = watch.borrow().as_ref() {
+                        return load_result.clone();
+                    }
+                    watch.next().await;
+                }
+            },
+            move |me, load_result, ctx| {
+                me.loading_entries.remove(&entry);
+                match load_result {
+                    Ok(buffer_handle) => {
+                        let buffer_view = Box::new(ctx.add_view(|ctx| {
+                            BufferView::for_buffer(
+                                buffer_handle,
+                                Some(file),
+                                me.settings.clone(),
+                                ctx,
+                            )
+                        }));
+                        me.add_item(buffer_view, ctx);
+                    }
+                    Err(error) => {
+                        log::error!("error opening item: {}", error);
+                    }
+                }
+            },
+        ))
     }
 
     pub fn save_active_item(&mut self, _: &(), ctx: &mut ViewContext<Self>) {
@@ -299,10 +471,6 @@ impl WorkspaceView {
         };
     }
 
-    fn workspace_updated(&mut self, _: ModelHandle<Workspace>, ctx: &mut ViewContext<Self>) {
-        ctx.notify();
-    }
-
     fn add_pane(&mut self, ctx: &mut ViewContext<Self>) -> ViewHandle<Pane> {
         let pane = ctx.add_view(|_| Pane::new(self.settings.clone()));
         let pane_id = pane.id();
@@ -388,11 +556,11 @@ impl WorkspaceView {
     }
 }
 
-impl Entity for WorkspaceView {
+impl Entity for Workspace {
     type Event = ();
 }
 
-impl View for WorkspaceView {
+impl View for Workspace {
     fn ui_name() -> &'static str {
         "Workspace"
     }
@@ -414,13 +582,95 @@ impl View for WorkspaceView {
     }
 }
 
+#[cfg(test)]
+pub trait WorkspaceHandle {
+    fn file_entries(&self, app: &AppContext) -> Vec<(usize, Arc<Path>)>;
+}
+
+#[cfg(test)]
+impl WorkspaceHandle for ViewHandle<Workspace> {
+    fn file_entries(&self, app: &AppContext) -> Vec<(usize, Arc<Path>)> {
+        self.read(app)
+            .worktrees()
+            .iter()
+            .flat_map(|tree| {
+                let tree_id = tree.id();
+                tree.read(app)
+                    .files(0)
+                    .map(move |f| (tree_id, f.path().clone()))
+            })
+            .collect::<Vec<_>>()
+    }
+}
+
 #[cfg(test)]
 mod tests {
-    use super::{pane, Workspace, WorkspaceView};
-    use crate::{settings, test::temp_tree, workspace::WorkspaceHandle as _};
+    use super::*;
+    use crate::{editor::BufferView, settings, test::temp_tree};
     use gpui::App;
     use serde_json::json;
-    use std::collections::HashSet;
+    use std::{collections::HashSet, os::unix};
+
+    #[test]
+    fn test_open_paths_action() {
+        App::test((), |app| {
+            let settings = settings::channel(&app.font_cache()).unwrap().1;
+
+            init(app);
+
+            let dir = temp_tree(json!({
+                "a": {
+                    "aa": null,
+                    "ab": null,
+                },
+                "b": {
+                    "ba": null,
+                    "bb": null,
+                },
+                "c": {
+                    "ca": null,
+                    "cb": null,
+                },
+            }));
+
+            app.dispatch_global_action(
+                "workspace:open_paths",
+                OpenParams {
+                    paths: vec![
+                        dir.path().join("a").to_path_buf(),
+                        dir.path().join("b").to_path_buf(),
+                    ],
+                    settings: settings.clone(),
+                },
+            );
+            assert_eq!(app.window_ids().count(), 1);
+
+            app.dispatch_global_action(
+                "workspace:open_paths",
+                OpenParams {
+                    paths: vec![dir.path().join("a").to_path_buf()],
+                    settings: settings.clone(),
+                },
+            );
+            assert_eq!(app.window_ids().count(), 1);
+            let workspace_view_1 = app
+                .root_view::<Workspace>(app.window_ids().next().unwrap())
+                .unwrap();
+            assert_eq!(workspace_view_1.read(app).worktrees().len(), 2);
+
+            app.dispatch_global_action(
+                "workspace:open_paths",
+                OpenParams {
+                    paths: vec![
+                        dir.path().join("b").to_path_buf(),
+                        dir.path().join("c").to_path_buf(),
+                    ],
+                    settings: settings.clone(),
+                },
+            );
+            assert_eq!(app.window_ids().count(), 2);
+        });
+    }
 
     #[test]
     fn test_open_entry() {
@@ -434,7 +684,13 @@ mod tests {
             }));
 
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let workspace = app.add_model(|ctx| Workspace::new(vec![dir.path().into()], ctx));
+
+            let (_, workspace) = app.add_window(|ctx| {
+                let mut workspace = Workspace::new(0, settings, ctx);
+                workspace.add_worktree(dir.path(), ctx);
+                workspace
+            });
+
             app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
                 .await;
             let entries = app.read(|ctx| workspace.file_entries(ctx));
@@ -442,12 +698,10 @@ mod tests {
             let file2 = entries[1].clone();
             let file3 = entries[2].clone();
 
-            let (_, workspace_view) =
-                app.add_window(|ctx| WorkspaceView::new(workspace.clone(), settings, ctx));
-            let pane = app.read(|ctx| workspace_view.read(ctx).active_pane().clone());
+            let pane = app.read(|ctx| workspace.read(ctx).active_pane().clone());
 
             // Open the first entry
-            workspace_view
+            workspace
                 .update(&mut app, |w, ctx| w.open_entry(file1.clone(), ctx))
                 .unwrap()
                 .await;
@@ -461,7 +715,7 @@ mod tests {
             });
 
             // Open the second entry
-            workspace_view
+            workspace
                 .update(&mut app, |w, ctx| w.open_entry(file2.clone(), ctx))
                 .unwrap()
                 .await;
@@ -475,7 +729,7 @@ mod tests {
             });
 
             // Open the first entry again. The existing pane item is activated.
-            workspace_view.update(&mut app, |w, ctx| {
+            workspace.update(&mut app, |w, ctx| {
                 assert!(w.open_entry(file1.clone(), ctx).is_none())
             });
             app.read(|ctx| {
@@ -488,7 +742,7 @@ mod tests {
             });
 
             // Open the third entry twice concurrently. Only one pane item is added.
-            workspace_view
+            workspace
                 .update(&mut app, |w, ctx| {
                     let task = w.open_entry(file3.clone(), ctx).unwrap();
                     assert!(w.open_entry(file3.clone(), ctx).is_none());
@@ -516,22 +770,24 @@ mod tests {
                 "b.txt": "",
             }));
 
-            let workspace = app.add_model(|ctx| Workspace::new(vec![dir1.path().into()], ctx));
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let (_, workspace_view) =
-                app.add_window(|ctx| WorkspaceView::new(workspace.clone(), settings, ctx));
+            let (_, workspace) = app.add_window(|ctx| {
+                let mut workspace = Workspace::new(0, settings, ctx);
+                workspace.add_worktree(dir1.path(), ctx);
+                workspace
+            });
             app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
                 .await;
 
             // Open a file within an existing worktree.
             app.update(|ctx| {
-                workspace_view.update(ctx, |view, ctx| {
+                workspace.update(ctx, |view, ctx| {
                     view.open_paths(&[dir1.path().join("a.txt")], ctx)
                 })
             })
             .await;
             app.read(|ctx| {
-                workspace_view
+                workspace
                     .read(ctx)
                     .active_pane()
                     .read(ctx)
@@ -543,7 +799,7 @@ mod tests {
 
             // Open a file outside of any existing worktree.
             app.update(|ctx| {
-                workspace_view.update(ctx, |view, ctx| {
+                workspace.update(ctx, |view, ctx| {
                     view.open_paths(&[dir2.path().join("b.txt")], ctx)
                 })
             })
@@ -563,7 +819,7 @@ mod tests {
                 );
             });
             app.read(|ctx| {
-                workspace_view
+                workspace
                     .read(ctx)
                     .active_pane()
                     .read(ctx)
@@ -575,6 +831,67 @@ mod tests {
         });
     }
 
+    #[test]
+    fn test_open_two_paths_to_the_same_file() {
+        use crate::workspace::ItemViewHandle;
+
+        App::test_async((), |mut app| async move {
+            // Create a worktree with a symlink:
+            //   dir
+            //   ├── hello.txt
+            //   └── hola.txt -> hello.txt
+            let temp_dir = temp_tree(json!({ "hello.txt": "hi" }));
+            let dir = temp_dir.path();
+            unix::fs::symlink(dir.join("hello.txt"), dir.join("hola.txt")).unwrap();
+
+            let settings = settings::channel(&app.font_cache()).unwrap().1;
+            let (_, workspace) = app.add_window(|ctx| {
+                let mut workspace = Workspace::new(0, settings, ctx);
+                workspace.add_worktree(dir, ctx);
+                workspace
+            });
+            app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
+                .await;
+
+            // Simultaneously open both the original file and the symlink to the same file.
+            app.update(|ctx| {
+                workspace.update(ctx, |view, ctx| {
+                    view.open_paths(&[dir.join("hello.txt"), dir.join("hola.txt")], ctx)
+                })
+            })
+            .await;
+
+            // The same content shows up with two different editors.
+            let buffer_views = app.read(|ctx| {
+                workspace
+                    .read(ctx)
+                    .active_pane()
+                    .read(ctx)
+                    .items()
+                    .iter()
+                    .map(|i| i.to_any().downcast::<BufferView>().unwrap())
+                    .collect::<Vec<_>>()
+            });
+            app.read(|ctx| {
+                assert_eq!(buffer_views[0].title(ctx), "hello.txt");
+                assert_eq!(buffer_views[1].title(ctx), "hola.txt");
+                assert_eq!(buffer_views[0].read(ctx).text(ctx), "hi");
+                assert_eq!(buffer_views[1].read(ctx).text(ctx), "hi");
+            });
+
+            // When modifying one buffer, the changes appear in both editors.
+            app.update(|ctx| {
+                buffer_views[0].update(ctx, |buf, ctx| {
+                    buf.insert(&"oh, ".to_string(), ctx);
+                });
+            });
+            app.read(|ctx| {
+                assert_eq!(buffer_views[0].read(ctx).text(ctx), "oh, hi");
+                assert_eq!(buffer_views[1].read(ctx).text(ctx), "oh, hi");
+            });
+        });
+    }
+
     #[test]
     fn test_pane_actions() {
         App::test_async((), |mut app| async move {
@@ -589,17 +906,19 @@ mod tests {
             }));
 
             let settings = settings::channel(&app.font_cache()).unwrap().1;
-            let workspace = app.add_model(|ctx| Workspace::new(vec![dir.path().into()], ctx));
+            let (window_id, workspace) = app.add_window(|ctx| {
+                let mut workspace = Workspace::new(0, settings, ctx);
+                workspace.add_worktree(dir.path(), ctx);
+                workspace
+            });
             app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
                 .await;
             let entries = app.read(|ctx| workspace.file_entries(ctx));
             let file1 = entries[0].clone();
 
-            let (window_id, workspace_view) =
-                app.add_window(|ctx| WorkspaceView::new(workspace.clone(), settings, ctx));
-            let pane_1 = app.read(|ctx| workspace_view.read(ctx).active_pane().clone());
+            let pane_1 = app.read(|ctx| workspace.read(ctx).active_pane().clone());
 
-            workspace_view
+            workspace
                 .update(&mut app, |w, ctx| w.open_entry(file1.clone(), ctx))
                 .unwrap()
                 .await;
@@ -612,14 +931,14 @@ mod tests {
 
             app.dispatch_action(window_id, vec![pane_1.id()], "pane:split_right", ());
             app.update(|ctx| {
-                let pane_2 = workspace_view.read(ctx).active_pane().clone();
+                let pane_2 = workspace.read(ctx).active_pane().clone();
                 assert_ne!(pane_1, pane_2);
 
                 let pane2_item = pane_2.read(ctx).active_item().unwrap();
                 assert_eq!(pane2_item.entry_id(ctx.as_ref()), Some(file1.clone()));
 
                 ctx.dispatch_action(window_id, vec![pane_2.id()], "pane:close_active_item", ());
-                let workspace_view = workspace_view.read(ctx);
+                let workspace_view = workspace.read(ctx);
                 assert_eq!(workspace_view.panes.len(), 1);
                 assert_eq!(workspace_view.active_pane(), &pane_1);
             });

zed/src/workspace/mod.rs 🔗

@@ -1,159 +0,0 @@
-pub mod pane;
-pub mod pane_group;
-pub mod workspace;
-pub mod workspace_view;
-
-pub use pane::*;
-pub use pane_group::*;
-pub use workspace::*;
-pub use workspace_view::*;
-
-use crate::{
-    settings::Settings,
-    watch::{self, Receiver},
-};
-use gpui::{MutableAppContext, PathPromptOptions};
-use std::path::PathBuf;
-
-pub fn init(app: &mut MutableAppContext) {
-    app.add_global_action("workspace:open", open);
-    app.add_global_action("workspace:open_paths", open_paths);
-    app.add_global_action("app:quit", quit);
-    pane::init(app);
-    workspace_view::init(app);
-}
-
-pub struct OpenParams {
-    pub paths: Vec<PathBuf>,
-    pub settings: watch::Receiver<Settings>,
-}
-
-fn open(settings: &Receiver<Settings>, ctx: &mut MutableAppContext) {
-    let settings = settings.clone();
-    ctx.prompt_for_paths(
-        PathPromptOptions {
-            files: true,
-            directories: true,
-            multiple: true,
-        },
-        move |paths, ctx| {
-            if let Some(paths) = paths {
-                ctx.dispatch_global_action("workspace:open_paths", OpenParams { paths, settings });
-            }
-        },
-    );
-}
-
-fn open_paths(params: &OpenParams, app: &mut MutableAppContext) {
-    log::info!("open paths {:?}", params.paths);
-
-    // Open paths in existing workspace if possible
-    for window_id in app.window_ids().collect::<Vec<_>>() {
-        if let Some(handle) = app.root_view::<WorkspaceView>(window_id) {
-            if handle.update(app, |view, ctx| {
-                if view.contains_paths(&params.paths, ctx.as_ref()) {
-                    let open_paths = view.open_paths(&params.paths, ctx);
-                    ctx.foreground().spawn(open_paths).detach();
-                    log::info!("open paths on existing workspace");
-                    true
-                } else {
-                    false
-                }
-            }) {
-                return;
-            }
-        }
-    }
-
-    log::info!("open new workspace");
-
-    // Add a new workspace if necessary
-    let workspace = app.add_model(|ctx| Workspace::new(vec![], ctx));
-    app.add_window(|ctx| {
-        let view = WorkspaceView::new(workspace, params.settings.clone(), ctx);
-        let open_paths = view.open_paths(&params.paths, ctx);
-        ctx.foreground().spawn(open_paths).detach();
-        view
-    });
-}
-
-fn quit(_: &(), app: &mut MutableAppContext) {
-    app.platform().quit();
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::{settings, test::*};
-    use gpui::App;
-    use serde_json::json;
-
-    #[test]
-    fn test_open_paths_action() {
-        App::test((), |app| {
-            let settings = settings::channel(&app.font_cache()).unwrap().1;
-
-            init(app);
-
-            let dir = temp_tree(json!({
-                "a": {
-                    "aa": null,
-                    "ab": null,
-                },
-                "b": {
-                    "ba": null,
-                    "bb": null,
-                },
-                "c": {
-                    "ca": null,
-                    "cb": null,
-                },
-            }));
-
-            app.dispatch_global_action(
-                "workspace:open_paths",
-                OpenParams {
-                    paths: vec![
-                        dir.path().join("a").to_path_buf(),
-                        dir.path().join("b").to_path_buf(),
-                    ],
-                    settings: settings.clone(),
-                },
-            );
-            assert_eq!(app.window_ids().count(), 1);
-
-            app.dispatch_global_action(
-                "workspace:open_paths",
-                OpenParams {
-                    paths: vec![dir.path().join("a").to_path_buf()],
-                    settings: settings.clone(),
-                },
-            );
-            assert_eq!(app.window_ids().count(), 1);
-            let workspace_view_1 = app
-                .root_view::<WorkspaceView>(app.window_ids().next().unwrap())
-                .unwrap();
-            assert_eq!(
-                workspace_view_1
-                    .read(app)
-                    .workspace
-                    .read(app)
-                    .worktrees()
-                    .len(),
-                2
-            );
-
-            app.dispatch_global_action(
-                "workspace:open_paths",
-                OpenParams {
-                    paths: vec![
-                        dir.path().join("b").to_path_buf(),
-                        dir.path().join("c").to_path_buf(),
-                    ],
-                    settings: settings.clone(),
-                },
-            );
-            assert_eq!(app.window_ids().count(), 2);
-        });
-    }
-}

zed/src/workspace/workspace.rs 🔗

@@ -1,298 +0,0 @@
-use super::{ItemView, ItemViewHandle};
-use crate::{
-    editor::{Buffer, History},
-    settings::Settings,
-    time::ReplicaId,
-    watch,
-    worktree::{Worktree, WorktreeHandle as _},
-};
-use anyhow::anyhow;
-use gpui::{AppContext, Entity, Handle, ModelContext, ModelHandle, MutableAppContext, ViewContext};
-use smol::prelude::*;
-use std::{
-    collections::{HashMap, HashSet},
-    fmt::Debug,
-    path::{Path, PathBuf},
-    pin::Pin,
-    sync::Arc,
-};
-
-pub trait Item
-where
-    Self: Sized,
-{
-    type View: ItemView;
-    fn build_view(
-        handle: ModelHandle<Self>,
-        settings: watch::Receiver<Settings>,
-        ctx: &mut ViewContext<Self::View>,
-    ) -> Self::View;
-}
-
-pub trait ItemHandle: Debug + Send + Sync {
-    fn add_view(
-        &self,
-        window_id: usize,
-        settings: watch::Receiver<Settings>,
-        app: &mut MutableAppContext,
-    ) -> Box<dyn ItemViewHandle>;
-    fn id(&self) -> usize;
-    fn boxed_clone(&self) -> Box<dyn ItemHandle>;
-}
-
-impl<T: 'static + Item> ItemHandle for ModelHandle<T> {
-    fn add_view(
-        &self,
-        window_id: usize,
-        settings: watch::Receiver<Settings>,
-        app: &mut MutableAppContext,
-    ) -> Box<dyn ItemViewHandle> {
-        Box::new(app.add_view(window_id, |ctx| T::build_view(self.clone(), settings, ctx)))
-    }
-
-    fn id(&self) -> usize {
-        Handle::id(self)
-    }
-
-    fn boxed_clone(&self) -> Box<dyn ItemHandle> {
-        Box::new(self.clone())
-    }
-}
-
-impl Clone for Box<dyn ItemHandle> {
-    fn clone(&self) -> Self {
-        self.boxed_clone()
-    }
-}
-
-pub type OpenResult = Result<Box<dyn ItemHandle>, Arc<anyhow::Error>>;
-
-#[derive(Clone)]
-enum OpenedItem {
-    Loading(watch::Receiver<Option<OpenResult>>),
-    Loaded(Box<dyn ItemHandle>),
-}
-
-pub struct Workspace {
-    replica_id: ReplicaId,
-    worktrees: HashSet<ModelHandle<Worktree>>,
-    items: HashMap<(usize, u64), OpenedItem>,
-}
-
-impl Workspace {
-    pub fn new(paths: Vec<PathBuf>, ctx: &mut ModelContext<Self>) -> Self {
-        let mut workspace = Self {
-            replica_id: 0,
-            worktrees: HashSet::new(),
-            items: HashMap::new(),
-        };
-        workspace.open_paths(&paths, ctx);
-        workspace
-    }
-
-    pub fn worktrees(&self) -> &HashSet<ModelHandle<Worktree>> {
-        &self.worktrees
-    }
-
-    pub fn worktree_scans_complete(&self, ctx: &AppContext) -> impl Future<Output = ()> + 'static {
-        let futures = self
-            .worktrees
-            .iter()
-            .map(|worktree| worktree.read(ctx).scan_complete())
-            .collect::<Vec<_>>();
-        async move {
-            for future in futures {
-                future.await;
-            }
-        }
-    }
-
-    pub fn contains_paths(&self, paths: &[PathBuf], app: &AppContext) -> bool {
-        paths.iter().all(|path| self.contains_path(&path, app))
-    }
-
-    pub fn contains_path(&self, path: &Path, app: &AppContext) -> bool {
-        self.worktrees
-            .iter()
-            .any(|worktree| worktree.read(app).contains_abs_path(path))
-    }
-
-    pub fn open_paths(
-        &mut self,
-        paths: &[PathBuf],
-        ctx: &mut ModelContext<Self>,
-    ) -> Vec<(usize, Arc<Path>)> {
-        paths
-            .iter()
-            .cloned()
-            .map(move |path| self.open_path(path, ctx))
-            .collect()
-    }
-
-    fn open_path(&mut self, path: PathBuf, ctx: &mut ModelContext<Self>) -> (usize, Arc<Path>) {
-        for tree in self.worktrees.iter() {
-            if let Ok(relative_path) = path.strip_prefix(tree.read(ctx).abs_path()) {
-                return (tree.id(), relative_path.into());
-            }
-        }
-
-        let worktree = ctx.add_model(|ctx| Worktree::new(path.clone(), ctx));
-        let worktree_id = worktree.id();
-        ctx.observe(&worktree, Self::on_worktree_updated);
-        self.worktrees.insert(worktree);
-        ctx.notify();
-        (worktree_id, Path::new("").into())
-    }
-
-    pub fn open_entry(
-        &mut self,
-        (worktree_id, path): (usize, Arc<Path>),
-        ctx: &mut ModelContext<'_, Self>,
-    ) -> anyhow::Result<Pin<Box<dyn Future<Output = OpenResult> + Send>>> {
-        let worktree = self
-            .worktrees
-            .get(&worktree_id)
-            .cloned()
-            .ok_or_else(|| anyhow!("worktree {} does not exist", worktree_id,))?;
-
-        let inode = worktree
-            .read(ctx)
-            .inode_for_path(&path)
-            .ok_or_else(|| anyhow!("path {:?} does not exist", path))?;
-
-        let item_key = (worktree_id, inode);
-        if let Some(item) = self.items.get(&item_key).cloned() {
-            return Ok(async move {
-                match item {
-                    OpenedItem::Loaded(handle) => {
-                        return Ok(handle);
-                    }
-                    OpenedItem::Loading(rx) => loop {
-                        rx.updated().await;
-
-                        if let Some(result) = smol::block_on(rx.read()).clone() {
-                            return result;
-                        }
-                    },
-                }
-            }
-            .boxed());
-        }
-
-        let replica_id = self.replica_id;
-        let file = worktree.file(path.clone(), ctx.as_ref())?;
-        let history = file.load_history(ctx.as_ref());
-
-        let (mut tx, rx) = watch::channel(None);
-        self.items.insert(item_key, OpenedItem::Loading(rx));
-        ctx.spawn(
-            history,
-            move |me, history: anyhow::Result<History>, ctx| match history {
-                Ok(history) => {
-                    let handle = Box::new(
-                        ctx.add_model(|ctx| Buffer::from_history(replica_id, file, history, ctx)),
-                    ) as Box<dyn ItemHandle>;
-                    me.items
-                        .insert(item_key, OpenedItem::Loaded(handle.clone()));
-                    ctx.spawn(
-                        async move {
-                            tx.update(|value| *value = Some(Ok(handle))).await;
-                        },
-                        |_, _, _| {},
-                    )
-                    .detach();
-                }
-                Err(error) => {
-                    ctx.spawn(
-                        async move {
-                            tx.update(|value| *value = Some(Err(Arc::new(error)))).await;
-                        },
-                        |_, _, _| {},
-                    )
-                    .detach();
-                }
-            },
-        )
-        .detach();
-
-        self.open_entry((worktree_id, path), ctx)
-    }
-
-    fn on_worktree_updated(&mut self, _: ModelHandle<Worktree>, ctx: &mut ModelContext<Self>) {
-        ctx.notify();
-    }
-}
-
-impl Entity for Workspace {
-    type Event = ();
-}
-
-#[cfg(test)]
-pub trait WorkspaceHandle {
-    fn file_entries(&self, app: &AppContext) -> Vec<(usize, Arc<Path>)>;
-}
-
-#[cfg(test)]
-impl WorkspaceHandle for ModelHandle<Workspace> {
-    fn file_entries(&self, app: &AppContext) -> Vec<(usize, Arc<Path>)> {
-        self.read(app)
-            .worktrees()
-            .iter()
-            .flat_map(|tree| {
-                let tree_id = tree.id();
-                tree.read(app)
-                    .files(0)
-                    .map(move |f| (tree_id, f.path().clone()))
-            })
-            .collect::<Vec<_>>()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::test::temp_tree;
-    use gpui::App;
-    use serde_json::json;
-
-    #[test]
-    fn test_open_entry() {
-        App::test_async((), |mut app| async move {
-            let dir = temp_tree(json!({
-                "a": {
-                    "aa": "aa contents",
-                    "ab": "ab contents",
-                },
-            }));
-
-            let workspace = app.add_model(|ctx| Workspace::new(vec![dir.path().into()], ctx));
-            app.read(|ctx| workspace.read(ctx).worktree_scans_complete(ctx))
-                .await;
-
-            // Get the first file entry.
-            let tree = app.read(|ctx| workspace.read(ctx).worktrees.iter().next().unwrap().clone());
-            let path = app.read(|ctx| tree.read(ctx).files(0).next().unwrap().path().clone());
-            let entry = (tree.id(), path);
-
-            // Open the same entry twice before it finishes loading.
-            let (future_1, future_2) = workspace.update(&mut app, |w, app| {
-                (
-                    w.open_entry(entry.clone(), app).unwrap(),
-                    w.open_entry(entry.clone(), app).unwrap(),
-                )
-            });
-
-            let handle_1 = future_1.await.unwrap();
-            let handle_2 = future_2.await.unwrap();
-            assert_eq!(handle_1.id(), handle_2.id());
-
-            // Open the same entry again now that it has loaded
-            let handle_3 = workspace
-                .update(&mut app, |w, app| w.open_entry(entry, app).unwrap())
-                .await
-                .unwrap();
-
-            assert_eq!(handle_3.id(), handle_1.id());
-        })
-    }
-}

zed/src/worktree.rs 🔗

@@ -7,9 +7,9 @@ use crate::{
     sum_tree::{self, Cursor, Edit, SeekBias, SumTree},
 };
 use ::ignore::gitignore::Gitignore;
-use anyhow::{anyhow, Context, Result};
+use anyhow::{Context, Result};
 pub use fuzzy::{match_paths, PathMatch};
-use gpui::{scoped_pool, AppContext, Entity, ModelContext, ModelHandle, Task};
+use gpui::{scoped_pool, AppContext, Entity, ModelContext, ModelHandle, Task, View, ViewContext};
 use lazy_static::lazy_static;
 use parking_lot::Mutex;
 use postage::{
@@ -419,14 +419,14 @@ impl FileHandle {
         (self.worktree.id(), self.path())
     }
 
-    pub fn observe_from_model<T: Entity>(
+    pub fn observe_from_view<T: View>(
         &self,
-        ctx: &mut ModelContext<T>,
-        mut callback: impl FnMut(&mut T, FileHandle, &mut ModelContext<T>) + 'static,
+        ctx: &mut ViewContext<T>,
+        mut callback: impl FnMut(&mut T, FileHandle, &mut ViewContext<T>) + 'static,
     ) {
         let mut prev_state = self.state.lock().clone();
         let cur_state = Arc::downgrade(&self.state);
-        ctx.observe(&self.worktree, move |observer, worktree, ctx| {
+        ctx.observe_model(&self.worktree, move |observer, worktree, ctx| {
             if let Some(cur_state) = cur_state.upgrade() {
                 let cur_state_unlocked = cur_state.lock();
                 if *cur_state_unlocked != prev_state {
@@ -1126,15 +1126,14 @@ struct UpdateIgnoreStatusJob {
 }
 
 pub trait WorktreeHandle {
-    fn file(&self, path: impl AsRef<Path>, app: &AppContext) -> Result<FileHandle>;
+    fn file(&self, path: impl AsRef<Path>, app: &AppContext) -> Option<FileHandle>;
 }
 
 impl WorktreeHandle for ModelHandle<Worktree> {
-    fn file(&self, path: impl AsRef<Path>, app: &AppContext) -> Result<FileHandle> {
+    fn file(&self, path: impl AsRef<Path>, app: &AppContext) -> Option<FileHandle> {
         let tree = self.read(app);
-        let entry = tree
-            .entry_for_path(&path)
-            .ok_or_else(|| anyhow!("path does not exist in tree"))?;
+        let entry = tree.entry_for_path(&path)?;
+
         let path = entry.path().clone();
         let mut handles = tree.handles.lock();
         let state = if let Some(state) = handles.get(&path).and_then(Weak::upgrade) {
@@ -1148,7 +1147,7 @@ impl WorktreeHandle for ModelHandle<Worktree> {
             state
         };
 
-        Ok(FileHandle {
+        Some(FileHandle {
             worktree: self.clone(),
             state,
         })
@@ -1347,8 +1346,7 @@ mod tests {
             app.read(|ctx| tree.read(ctx).scan_complete()).await;
             app.read(|ctx| assert_eq!(tree.read(ctx).file_count(), 1));
 
-            let buffer =
-                app.add_model(|ctx| Buffer::new(1, "a line of text.\n".repeat(10 * 1024), ctx));
+            let buffer = app.add_model(|_| Buffer::new(1, "a line of text.\n".repeat(10 * 1024)));
 
             let path = tree.update(&mut app, |tree, ctx| {
                 let path = tree.files(0).next().unwrap().path().clone();