Remove unsafe code from App::test_async

Nathan Sobo created

I don't actually think it was correct to allow the future to borrow a mutable app reference. I went back to passing a wrapper around the refcell to async tests. They'll be a bit more annoying to write but also totally safe.

Change summary

gpui/src/app.rs                        | 210 ++++++++++++---------------
zed/src/editor/buffer_element.rs       |  20 +-
zed/src/editor/buffer_view.rs          | 110 +++++++-------
zed/src/editor/display_map/fold_map.rs |  18 +-
zed/src/editor/display_map/mod.rs      |  10 
zed/src/file_finder.rs                 |  40 ++--
zed/src/workspace/mod.rs               |   4 
zed/src/workspace/workspace.rs         |  22 +-
zed/src/workspace/workspace_view.rs    | 144 ++++++++++--------
zed/src/worktree/worktree.rs           |  60 ++++---
10 files changed, 320 insertions(+), 318 deletions(-)

Detailed changes

gpui/src/app.rs 🔗

@@ -45,8 +45,8 @@ pub trait View: Entity {
     }
 }
 
-pub trait ModelAsRef {
-    fn model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T;
+pub trait ReadModel {
+    fn read_model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T;
 }
 
 pub trait UpdateModel {
@@ -56,8 +56,8 @@ pub trait UpdateModel {
         F: FnOnce(&mut T, &mut ModelContext<T>) -> S;
 }
 
-pub trait ViewAsRef {
-    fn view<T: View>(&self, handle: &ViewHandle<T>) -> &T;
+pub trait ReadView {
+    fn read_view<T: View>(&self, handle: &ViewHandle<T>) -> &T;
 }
 
 pub trait UpdateView {
@@ -84,6 +84,9 @@ pub enum MenuItem<'a> {
 #[derive(Clone)]
 pub struct App(Rc<RefCell<MutableAppContext>>);
 
+#[derive(Clone)]
+pub struct TestAppContext(Rc<RefCell<MutableAppContext>>);
+
 impl App {
     pub fn test<T, A: AssetSource, F: FnOnce(&mut MutableAppContext) -> T>(
         asset_source: A,
@@ -101,27 +104,21 @@ impl App {
         f(&mut *ctx)
     }
 
-    pub fn test_async<'a, T, F, A: AssetSource, Fn>(asset_source: A, f: Fn) -> T
+    pub fn test_async<T, F, A: AssetSource, Fn>(asset_source: A, f: Fn) -> T
     where
-        Fn: FnOnce(&'a mut MutableAppContext) -> F,
-        F: Future<Output = T> + 'a,
+        Fn: FnOnce(TestAppContext) -> F,
+        F: Future<Output = T>,
     {
         let platform = platform::test::platform();
         let foreground = Rc::new(executor::Foreground::test());
-        let ctx = Rc::new(RefCell::new(MutableAppContext::new(
+        let ctx = TestAppContext(Rc::new(RefCell::new(MutableAppContext::new(
             foreground.clone(),
             Rc::new(platform),
             asset_source,
-        )));
-        let mut ctx_ref = ctx.borrow_mut();
-        ctx_ref.weak_self = Some(Rc::downgrade(&ctx));
-        let ctx = &mut *ctx_ref;
+        ))));
+        ctx.0.borrow_mut().weak_self = Some(Rc::downgrade(&ctx.0));
 
-        // TODO - is there a better way of getting this to compile?
-        let ctx = unsafe { std::mem::transmute(ctx) };
         let future = f(ctx);
-
-        drop(ctx_ref);
         smol::block_on(foreground.run(future))
     }
 
@@ -208,42 +205,27 @@ impl App {
     where
         F: 'static + FnOnce(&mut MutableAppContext),
     {
-        let platform = self.platform();
+        let platform = self.0.borrow().platform.clone();
         platform.run(Box::new(move || {
             let mut ctx = self.0.borrow_mut();
             on_finish_launching(&mut *ctx);
         }))
     }
 
-    pub fn on_window_invalidated<F: 'static + FnMut(WindowInvalidation, &mut MutableAppContext)>(
-        &self,
-        window_id: usize,
-        callback: F,
-    ) {
-        self.0
-            .borrow_mut()
-            .on_window_invalidated(window_id, callback);
-    }
-
-    pub fn add_action<S, V, T, F>(&self, name: S, handler: F)
-    where
-        S: Into<String>,
-        V: View,
-        T: Any,
-        F: 'static + FnMut(&mut V, &T, &mut ViewContext<V>),
-    {
-        self.0.borrow_mut().add_action(name, handler);
+    pub fn font_cache(&self) -> Arc<FontCache> {
+        self.0.borrow().font_cache.clone()
     }
 
-    pub fn add_global_action<S, T, F>(&self, name: S, handler: F)
-    where
-        S: Into<String>,
-        T: 'static + Any,
-        F: 'static + FnMut(&T, &mut MutableAppContext),
-    {
-        self.0.borrow_mut().add_global_action(name, handler);
+    fn update<T, F: FnOnce(&mut MutableAppContext) -> T>(&mut self, callback: F) -> T {
+        let mut state = self.0.borrow_mut();
+        state.pending_flushes += 1;
+        let result = callback(&mut *state);
+        state.flush_effects();
+        result
     }
+}
 
+impl TestAppContext {
     pub fn dispatch_action<T: 'static + Any>(
         &self,
         window_id: usize,
@@ -259,10 +241,6 @@ impl App {
         );
     }
 
-    pub fn add_bindings<T: IntoIterator<Item = keymap::Binding>>(&self, bindings: T) {
-        self.0.borrow_mut().add_bindings(bindings);
-    }
-
     pub fn dispatch_keystroke(
         &self,
         window_id: usize,
@@ -329,7 +307,7 @@ impl App {
         handle
     }
 
-    pub fn read<T, F: FnOnce(&AppContext) -> T>(&mut self, callback: F) -> T {
+    pub fn read<T, F: FnOnce(&AppContext) -> T>(&self, callback: F) -> T {
         callback(self.0.borrow().downgrade())
     }
 
@@ -354,7 +332,7 @@ impl App {
     }
 }
 
-impl UpdateModel for App {
+impl UpdateModel for TestAppContext {
     fn update_model<T, F, S>(&mut self, handle: &ModelHandle<T>, update: F) -> S
     where
         T: Entity,
@@ -368,7 +346,7 @@ impl UpdateModel for App {
     }
 }
 
-impl UpdateView for App {
+impl UpdateView for TestAppContext {
     fn update_view<T, F, S>(&mut self, handle: &ViewHandle<T>, update: F) -> S
     where
         T: View,
@@ -1249,8 +1227,8 @@ impl MutableAppContext {
     }
 }
 
-impl ModelAsRef for MutableAppContext {
-    fn model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
+impl ReadModel for MutableAppContext {
+    fn read_model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
         if let Some(model) = self.ctx.models.get(&handle.model_id) {
             model
                 .as_any()
@@ -1287,8 +1265,8 @@ impl UpdateModel for MutableAppContext {
     }
 }
 
-impl ViewAsRef for MutableAppContext {
-    fn view<T: View>(&self, handle: &ViewHandle<T>) -> &T {
+impl ReadView for MutableAppContext {
+    fn read_view<T: View>(&self, handle: &ViewHandle<T>) -> &T {
         if let Some(window) = self.ctx.windows.get(&handle.window_id) {
             if let Some(view) = window.views.get(&handle.view_id) {
                 view.as_any().downcast_ref().expect("Downcast is type safe")
@@ -1387,8 +1365,8 @@ impl AppContext {
     }
 }
 
-impl ModelAsRef for AppContext {
-    fn model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
+impl ReadModel for AppContext {
+    fn read_model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
         if let Some(model) = self.models.get(&handle.model_id) {
             model
                 .as_any()
@@ -1400,8 +1378,8 @@ impl ModelAsRef for AppContext {
     }
 }
 
-impl ViewAsRef for AppContext {
-    fn view<T: View>(&self, handle: &ViewHandle<T>) -> &T {
+impl ReadView for AppContext {
+    fn read_view<T: View>(&self, handle: &ViewHandle<T>) -> &T {
         if let Some(window) = self.windows.get(&handle.window_id) {
             if let Some(view) = window.views.get(&handle.view_id) {
                 view.as_any()
@@ -1672,9 +1650,9 @@ impl<'a, T: Entity> ModelContext<'a, T> {
     }
 }
 
-impl<M> ModelAsRef for ModelContext<'_, M> {
-    fn model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
-        self.app.model(handle)
+impl<M> ReadModel for ModelContext<'_, M> {
+    fn read_model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
+        self.app.read_model(handle)
     }
 }
 
@@ -1927,9 +1905,9 @@ impl<'a, T: View> ViewContext<'a, T> {
     }
 }
 
-impl<V> ModelAsRef for ViewContext<'_, V> {
-    fn model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
-        self.app.model(handle)
+impl<V> ReadModel for ViewContext<'_, V> {
+    fn read_model<T: Entity>(&self, handle: &ModelHandle<T>) -> &T {
+        self.app.read_model(handle)
     }
 }
 
@@ -1943,9 +1921,9 @@ impl<V: View> UpdateModel for ViewContext<'_, V> {
     }
 }
 
-impl<V: View> ViewAsRef for ViewContext<'_, V> {
-    fn view<T: View>(&self, handle: &ViewHandle<T>) -> &T {
-        self.app.view(handle)
+impl<V: View> ReadView for ViewContext<'_, V> {
+    fn read_view<T: View>(&self, handle: &ViewHandle<T>) -> &T {
+        self.app.read_view(handle)
     }
 }
 
@@ -1994,8 +1972,8 @@ impl<T: Entity> ModelHandle<T> {
         self.model_id
     }
 
-    pub fn as_ref<'a, A: ModelAsRef>(&self, app: &'a A) -> &'a T {
-        app.model(self)
+    pub fn read<'a, A: ReadModel>(&self, app: &'a A) -> &'a T {
+        app.read_model(self)
     }
 
     pub fn update<A, F, S>(&self, app: &mut A, update: F) -> S
@@ -2122,8 +2100,8 @@ impl<T: View> ViewHandle<T> {
         self.view_id
     }
 
-    pub fn as_ref<'a, A: ViewAsRef>(&self, app: &'a A) -> &'a T {
-        app.view(self)
+    pub fn read<'a, A: ReadView>(&self, app: &'a A) -> &'a T {
+        app.read_view(self)
     }
 
     pub fn update<A, F, S>(&self, app: &mut A, update: F) -> S
@@ -2470,9 +2448,9 @@ mod tests {
                 ctx.notify();
                 ctx.emit(2);
             });
-            assert_eq!(handle_1.as_ref(app).events, vec!["updated".to_string()]);
+            assert_eq!(handle_1.read(app).events, vec!["updated".to_string()]);
             assert_eq!(
-                handle_2.as_ref(app).events,
+                handle_2.read(app).events,
                 vec![
                     "observed event 1".to_string(),
                     "notified".to_string(),
@@ -2518,10 +2496,10 @@ mod tests {
             });
 
             handle_2.update(app, |_, c| c.emit(7));
-            assert_eq!(handle_1.as_ref(app).events, vec![7]);
+            assert_eq!(handle_1.read(app).events, vec![7]);
 
             handle_2.update(app, |_, c| c.emit(5));
-            assert_eq!(handle_1.as_ref(app).events, vec![7, 10, 5]);
+            assert_eq!(handle_1.read(app).events, vec![7, 10, 5]);
         })
     }
 
@@ -2544,9 +2522,9 @@ mod tests {
 
             handle_1.update(app, |_, c| {
                 c.observe(&handle_2, move |model, observed, c| {
-                    model.events.push(observed.as_ref(c).count);
+                    model.events.push(observed.read(c).count);
                     c.observe(&handle_2b, |model, observed, c| {
-                        model.events.push(observed.as_ref(c).count * 2);
+                        model.events.push(observed.read(c).count * 2);
                     });
                 });
             });
@@ -2555,13 +2533,13 @@ mod tests {
                 model.count = 7;
                 c.notify()
             });
-            assert_eq!(handle_1.as_ref(app).events, vec![7]);
+            assert_eq!(handle_1.read(app).events, vec![7]);
 
             handle_2.update(app, |model, c| {
                 model.count = 5;
                 c.notify()
             });
-            assert_eq!(handle_1.as_ref(app).events, vec![7, 10, 5])
+            assert_eq!(handle_1.read(app).events, vec![7, 10, 5])
         })
     }
 
@@ -2576,25 +2554,25 @@ mod tests {
             type Event = ();
         }
 
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let handle = app.add_model(|_| Model::default());
             handle
-                .update(app, |_, c| {
+                .update(&mut app, |_, c| {
                     c.spawn(async { 7 }, |model, output, _| {
                         model.count = output;
                     })
                 })
                 .await;
-            assert_eq!(handle.as_ref(app).count, 7);
+            app.read(|ctx| assert_eq!(handle.read(ctx).count, 7));
 
             handle
-                .update(app, |_, c| {
+                .update(&mut app, |_, c| {
                     c.spawn(async { 14 }, |model, output, _| {
                         model.count = output;
                     })
                 })
                 .await;
-            assert_eq!(handle.as_ref(app).count, 14);
+            app.read(|ctx| assert_eq!(handle.read(ctx).count, 14));
         });
     }
 
@@ -2609,10 +2587,10 @@ mod tests {
             type Event = ();
         }
 
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let handle = app.add_model(|_| Model::default());
             handle
-                .update(app, |_, c| {
+                .update(&mut app, |_, c| {
                     c.spawn_stream(
                         smol::stream::iter(vec![1, 2, 3]),
                         |model, output, _| {
@@ -2624,7 +2602,7 @@ mod tests {
                     )
                 })
                 .await;
-            assert_eq!(handle.as_ref(app).events, [Some(1), Some(2), Some(3), None])
+            app.read(|ctx| assert_eq!(handle.read(ctx).events, [Some(1), Some(2), Some(3), None]));
         })
     }
 
@@ -2674,9 +2652,9 @@ mod tests {
                 ctx.emit(1);
                 ctx.emit(2);
             });
-            assert_eq!(handle_1.as_ref(app).events, vec!["updated".to_string()]);
+            assert_eq!(handle_1.read(app).events, vec!["updated".to_string()]);
             assert_eq!(
-                handle_2.as_ref(app).events,
+                handle_2.read(app).events,
                 vec![
                     "observed event 1".to_string(),
                     "observed event 2".to_string(),
@@ -2742,13 +2720,13 @@ mod tests {
             });
 
             handle_2.update(app, |_, c| c.emit(7));
-            assert_eq!(handle_1.as_ref(app).events, vec![7]);
+            assert_eq!(handle_1.read(app).events, vec![7]);
 
             handle_2.update(app, |_, c| c.emit(5));
-            assert_eq!(handle_1.as_ref(app).events, vec![7, 10, 5]);
+            assert_eq!(handle_1.read(app).events, vec![7, 10, 5]);
 
             handle_3.update(app, |_, c| c.emit(9));
-            assert_eq!(handle_1.as_ref(app).events, vec![7, 10, 5, 9]);
+            assert_eq!(handle_1.read(app).events, vec![7, 10, 5, 9]);
         })
     }
 
@@ -2837,7 +2815,7 @@ mod tests {
 
             view.update(app, |_, c| {
                 c.observe(&model, |me, observed, c| {
-                    me.events.push(observed.as_ref(c).count)
+                    me.events.push(observed.read(c).count)
                 });
             });
 
@@ -2845,7 +2823,7 @@ mod tests {
                 model.count = 11;
                 c.notify();
             });
-            assert_eq!(view.as_ref(app).events, vec![11]);
+            assert_eq!(view.read(app).events, vec![11]);
         })
     }
 
@@ -2942,7 +2920,7 @@ mod tests {
             });
 
             assert_eq!(
-                view_1.as_ref(app).events,
+                view_1.read(app).events,
                 [
                     "self focused".to_string(),
                     "self blurred".to_string(),
@@ -2975,24 +2953,24 @@ mod tests {
             }
         }
 
-        App::test_async((), |app| async move {
-            let (_, handle) = app.add_window(|_| View::default());
+        App::test_async((), |mut app| async move {
+            let handle = app.add_window(|_| View::default()).1;
             handle
-                .update(app, |_, c| {
+                .update(&mut app, |_, c| {
                     c.spawn(async { 7 }, |me, output, _| {
                         me.count = output;
                     })
                 })
                 .await;
-            assert_eq!(handle.as_ref(app).count, 7);
+            app.read(|ctx| assert_eq!(handle.read(ctx).count, 7));
             handle
-                .update(app, |_, c| {
+                .update(&mut app, |_, c| {
                     c.spawn(async { 14 }, |me, output, _| {
                         me.count = output;
                     })
                 })
                 .await;
-            assert_eq!(handle.as_ref(app).count, 14);
+            app.read(|ctx| assert_eq!(handle.read(ctx).count, 14));
         });
     }
 
@@ -3017,10 +2995,10 @@ mod tests {
             }
         }
 
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let (_, handle) = app.add_window(|_| View::default());
             handle
-                .update(app, |_, c| {
+                .update(&mut app, |_, c| {
                     c.spawn_stream(
                         smol::stream::iter(vec![1_usize, 2, 3]),
                         |me, output, _| {
@@ -3033,7 +3011,7 @@ mod tests {
                 })
                 .await;
 
-            assert_eq!(handle.as_ref(app).events, [Some(1), Some(2), Some(3), None])
+            app.read(|ctx| assert_eq!(handle.read(ctx).events, [Some(1), Some(2), Some(3), None]))
         });
     }
 
@@ -3335,49 +3313,49 @@ mod tests {
             type Event = ();
         }
 
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let model = app.add_model(|_| Model);
             let (_, view) = app.add_window(|_| View);
 
-            model.update(app, |_, ctx| {
+            model.update(&mut app, |_, ctx| {
                 ctx.spawn(async {}, |_, _, _| {}).detach();
                 // Cancel this task
                 drop(ctx.spawn(async {}, |_, _, _| {}));
             });
 
-            view.update(app, |_, ctx| {
+            view.update(&mut app, |_, ctx| {
                 ctx.spawn(async {}, |_, _, _| {}).detach();
                 // Cancel this task
                 drop(ctx.spawn(async {}, |_, _, _| {}));
             });
 
-            assert!(!app.future_handlers.borrow().is_empty());
+            assert!(!app.0.borrow().future_handlers.borrow().is_empty());
             app.finish_pending_tasks().await;
-            assert!(app.future_handlers.borrow().is_empty());
+            assert!(app.0.borrow().future_handlers.borrow().is_empty());
             app.finish_pending_tasks().await; // Don't block if there are no tasks
 
-            model.update(app, |_, ctx| {
+            model.update(&mut app, |_, ctx| {
                 ctx.spawn_stream(smol::stream::iter(vec![1, 2, 3]), |_, _, _| {}, |_, _| {})
                     .detach();
                 // Cancel this task
                 drop(ctx.spawn_stream(smol::stream::iter(vec![1, 2, 3]), |_, _, _| {}, |_, _| {}));
             });
 
-            view.update(app, |_, ctx| {
+            view.update(&mut app, |_, ctx| {
                 ctx.spawn_stream(smol::stream::iter(vec![1, 2, 3]), |_, _, _| {}, |_, _| {})
                     .detach();
                 // Cancel this task
                 drop(ctx.spawn_stream(smol::stream::iter(vec![1, 2, 3]), |_, _, _| {}, |_, _| {}));
             });
 
-            assert!(!app.stream_handlers.borrow().is_empty());
+            assert!(!app.0.borrow().stream_handlers.borrow().is_empty());
             app.finish_pending_tasks().await;
-            assert!(app.stream_handlers.borrow().is_empty());
+            assert!(app.0.borrow().stream_handlers.borrow().is_empty());
             app.finish_pending_tasks().await; // Don't block if there are no tasks
 
             // Tasks are considered finished when we drop handles
             let mut tasks = Vec::new();
-            model.update(app, |_, ctx| {
+            model.update(&mut app, |_, ctx| {
                 tasks.push(Box::new(ctx.spawn(async {}, |_, _, _| {})));
                 tasks.push(Box::new(ctx.spawn_stream(
                     smol::stream::iter(vec![1, 2, 3]),
@@ -3386,7 +3364,7 @@ mod tests {
                 )));
             });
 
-            view.update(app, |_, ctx| {
+            view.update(&mut app, |_, ctx| {
                 tasks.push(Box::new(ctx.spawn(async {}, |_, _, _| {})));
                 tasks.push(Box::new(ctx.spawn_stream(
                     smol::stream::iter(vec![1, 2, 3]),
@@ -3395,12 +3373,12 @@ mod tests {
                 )));
             });
 
-            assert!(!app.stream_handlers.borrow().is_empty());
+            assert!(!app.0.borrow().stream_handlers.borrow().is_empty());
 
             let finish_pending_tasks = app.finish_pending_tasks();
             drop(tasks);
             finish_pending_tasks.await;
-            assert!(app.stream_handlers.borrow().is_empty());
+            assert!(app.0.borrow().stream_handlers.borrow().is_empty());
             app.finish_pending_tasks().await; // Don't block if there are no tasks
         });
     }

zed/src/editor/buffer_element.rs 🔗

@@ -37,7 +37,7 @@ impl BufferElement {
         ctx: &mut EventContext,
     ) -> bool {
         if paint.text_bounds.contains_point(position) {
-            let view = self.view.as_ref(ctx.app);
+            let view = self.view.read(ctx.app);
             let position =
                 paint.point_for_position(view, layout, position, ctx.font_cache, ctx.app);
             ctx.dispatch_action("buffer:select", SelectAction::Begin { position, add: cmd });
@@ -48,7 +48,7 @@ impl BufferElement {
     }
 
     fn mouse_up(&self, _position: Vector2F, ctx: &mut EventContext) -> bool {
-        if self.view.as_ref(ctx.app).is_selecting() {
+        if self.view.read(ctx.app).is_selecting() {
             ctx.dispatch_action("buffer:select", SelectAction::End);
             true
         } else {
@@ -63,7 +63,7 @@ impl BufferElement {
         paint: &mut PaintState,
         ctx: &mut EventContext,
     ) -> bool {
-        let view = self.view.as_ref(ctx.app);
+        let view = self.view.read(ctx.app);
 
         if view.is_selecting() {
             let rect = paint.text_bounds;
@@ -145,7 +145,7 @@ impl BufferElement {
             return false;
         }
 
-        let view = self.view.as_ref(ctx.app);
+        let view = self.view.read(ctx.app);
         let font_cache = &ctx.font_cache;
         let layout_cache = &ctx.text_layout_cache;
         let max_glyph_width = view.em_width(font_cache);
@@ -167,7 +167,7 @@ impl BufferElement {
     }
 
     fn paint_gutter(&mut self, rect: RectF, layout: &LayoutState, ctx: &mut PaintContext) {
-        let view = self.view.as_ref(ctx.app);
+        let view = self.view.read(ctx.app);
         let line_height = view.line_height(ctx.font_cache);
         let scroll_top = view.scroll_position().y() * line_height;
 
@@ -197,7 +197,7 @@ impl BufferElement {
     }
 
     fn paint_text(&mut self, bounds: RectF, layout: &LayoutState, ctx: &mut PaintContext) {
-        let view = self.view.as_ref(ctx.app);
+        let view = self.view.read(ctx.app);
         let line_height = view.line_height(ctx.font_cache);
         let descent = view.font_descent(ctx.font_cache);
         let start_row = view.scroll_position().y() as u32;
@@ -313,14 +313,14 @@ impl Element for BufferElement {
         let app = ctx.app;
         let mut size = constraint.max;
         if size.y().is_infinite() {
-            let view = self.view.as_ref(app);
+            let view = self.view.read(app);
             size.set_y((view.max_point(app).row() + 1) as f32 * view.line_height(ctx.font_cache));
         }
         if size.x().is_infinite() {
             unimplemented!("we don't yet handle an infinite width constraint on buffer elements");
         }
 
-        let view = self.view.as_ref(app);
+        let view = self.view.read(app);
         let font_cache = &ctx.font_cache;
         let layout_cache = &ctx.text_layout_cache;
         let line_height = view.line_height(font_cache);
@@ -404,7 +404,7 @@ impl Element for BufferElement {
         if let Some(layout) = layout {
             let app = ctx.app.downgrade();
 
-            let view = self.view.as_ref(app);
+            let view = self.view.read(app);
             view.clamp_scroll_left(
                 layout
                     .scroll_max(view, ctx.font_cache, ctx.text_layout_cache, app)
@@ -437,7 +437,7 @@ impl Element for BufferElement {
                 layout.text_size,
             );
 
-            if self.view.as_ref(ctx.app).is_gutter_visible() {
+            if self.view.read(ctx.app).is_gutter_visible() {
                 self.paint_gutter(gutter_bounds, layout, ctx);
             }
             self.paint_text(text_bounds, layout, ctx);

zed/src/editor/buffer_view.rs 🔗

@@ -125,7 +125,7 @@ impl BufferView {
         });
         ctx.observe(&display_map, Self::on_display_map_changed);
 
-        let buffer_ref = buffer.as_ref(ctx);
+        let buffer_ref = buffer.read(ctx);
         Self {
             handle: ctx.handle().downgrade(),
             buffer,
@@ -188,7 +188,7 @@ impl BufferView {
             return false;
         }
 
-        let map = self.display_map.as_ref(app);
+        let map = self.display_map.read(app);
         let visible_lines = viewport_height / line_height;
         let first_cursor_top = self
             .selections
@@ -238,7 +238,7 @@ impl BufferView {
         layouts: &[Arc<text_layout::Line>],
         app: &AppContext,
     ) {
-        let map = self.display_map.as_ref(app);
+        let map = self.display_map.read(app);
 
         let mut target_left = std::f32::INFINITY;
         let mut target_right = 0.0_f32;
@@ -287,7 +287,7 @@ impl BufferView {
             ctx.emit(Event::Activate);
         }
 
-        let display_map = self.display_map.as_ref(ctx);
+        let display_map = self.display_map.read(ctx);
         let cursor = display_map
             .anchor_before(position, Bias::Left, ctx.app())
             .unwrap();
@@ -312,8 +312,8 @@ impl BufferView {
         scroll_position: Vector2F,
         ctx: &mut ViewContext<Self>,
     ) {
-        let buffer = self.buffer.as_ref(ctx);
-        let map = self.display_map.as_ref(ctx);
+        let buffer = self.buffer.read(ctx);
+        let map = self.display_map.read(ctx);
         let cursor = map.anchor_before(position, Bias::Left, ctx.app()).unwrap();
         if let Some(selection) = self.pending_selection.as_mut() {
             selection.set_head(buffer, cursor);
@@ -347,8 +347,8 @@ impl BufferView {
     where
         T: IntoIterator<Item = &'a Range<DisplayPoint>>,
     {
-        let buffer = self.buffer.as_ref(ctx);
-        let map = self.display_map.as_ref(ctx);
+        let buffer = self.buffer.read(ctx);
+        let map = self.display_map.read(ctx);
         let mut selections = Vec::new();
         for range in ranges {
             selections.push(Selection {
@@ -366,7 +366,7 @@ impl BufferView {
     }
 
     fn insert(&mut self, text: &String, ctx: &mut ViewContext<Self>) {
-        let buffer = self.buffer.as_ref(ctx);
+        let buffer = self.buffer.read(ctx);
         let mut offset_ranges = SmallVec::<[Range<usize>; 32]>::new();
         for selection in &self.selections {
             let start = selection.start.to_offset(buffer).unwrap();
@@ -381,7 +381,7 @@ impl BufferView {
             };
         });
 
-        let buffer = self.buffer.as_ref(ctx);
+        let buffer = self.buffer.read(ctx);
         let char_count = text.chars().count() as isize;
         let mut delta = 0_isize;
         self.selections = offset_ranges
@@ -416,8 +416,8 @@ impl BufferView {
     }
 
     pub fn backspace(&mut self, _: &(), ctx: &mut ViewContext<Self>) {
-        let buffer = self.buffer.as_ref(ctx);
-        let map = self.display_map.as_ref(ctx);
+        let buffer = self.buffer.read(ctx);
+        let map = self.display_map.read(ctx);
         for selection in &mut self.selections {
             if selection.range(buffer).is_empty() {
                 let head = selection.head().to_display_point(map, ctx.app()).unwrap();
@@ -439,7 +439,7 @@ impl BufferView {
     pub fn move_left(&mut self, _: &(), ctx: &mut ViewContext<Self>) {
         {
             let app = ctx.app();
-            let map = self.display_map.as_ref(ctx);
+            let map = self.display_map.read(ctx);
             for selection in &mut self.selections {
                 let start = selection.start.to_display_point(map, app).unwrap();
                 let end = selection.end.to_display_point(map, app).unwrap();
@@ -462,8 +462,8 @@ impl BufferView {
 
     pub fn select_left(&mut self, _: &(), ctx: &mut ViewContext<Self>) {
         {
-            let buffer = self.buffer.as_ref(ctx);
-            let map = self.display_map.as_ref(ctx);
+            let buffer = self.buffer.read(ctx);
+            let map = self.display_map.read(ctx);
             for selection in &mut self.selections {
                 let head = selection.head().to_display_point(map, ctx.app()).unwrap();
                 let cursor = map
@@ -483,7 +483,7 @@ impl BufferView {
     pub fn move_right(&mut self, _: &(), ctx: &mut ViewContext<Self>) {
         {
             let app = ctx.app();
-            let map = self.display_map.as_ref(app);
+            let map = self.display_map.read(app);
             for selection in &mut self.selections {
                 let start = selection.start.to_display_point(map, app).unwrap();
                 let end = selection.end.to_display_point(map, app).unwrap();
@@ -506,9 +506,9 @@ impl BufferView {
 
     pub fn select_right(&mut self, _: &(), ctx: &mut ViewContext<Self>) {
         {
-            let buffer = self.buffer.as_ref(ctx);
+            let buffer = self.buffer.read(ctx);
             let app = ctx.app();
-            let map = self.display_map.as_ref(app);
+            let map = self.display_map.read(app);
             for selection in &mut self.selections {
                 let head = selection.head().to_display_point(map, ctx.app()).unwrap();
                 let cursor = map
@@ -526,7 +526,7 @@ impl BufferView {
             ctx.propagate_action();
         } else {
             let app = ctx.app();
-            let map = self.display_map.as_ref(app);
+            let map = self.display_map.read(app);
             for selection in &mut self.selections {
                 let start = selection.start.to_display_point(map, app).unwrap();
                 let end = selection.end.to_display_point(map, app).unwrap();
@@ -551,8 +551,8 @@ impl BufferView {
             ctx.propagate_action();
         } else {
             let app = ctx.app();
-            let buffer = self.buffer.as_ref(app);
-            let map = self.display_map.as_ref(app);
+            let buffer = self.buffer.read(app);
+            let map = self.display_map.read(app);
             for selection in &mut self.selections {
                 let head = selection.head().to_display_point(map, app).unwrap();
                 let (head, goal_column) =
@@ -569,7 +569,7 @@ impl BufferView {
             ctx.propagate_action();
         } else {
             let app = ctx.app();
-            let map = self.display_map.as_ref(app);
+            let map = self.display_map.read(app);
             for selection in &mut self.selections {
                 let start = selection.start.to_display_point(map, app).unwrap();
                 let end = selection.end.to_display_point(map, app).unwrap();
@@ -594,8 +594,8 @@ impl BufferView {
             ctx.propagate_action();
         } else {
             let app = ctx.app();
-            let buffer = self.buffer.as_ref(ctx);
-            let map = self.display_map.as_ref(ctx);
+            let buffer = self.buffer.read(ctx);
+            let map = self.display_map.read(ctx);
             for selection in &mut self.selections {
                 let head = selection.head().to_display_point(map, app).unwrap();
                 let (head, goal_column) =
@@ -615,7 +615,7 @@ impl BufferView {
     }
 
     fn merge_selections(&mut self, ctx: &AppContext) {
-        let buffer = self.buffer.as_ref(ctx);
+        let buffer = self.buffer.read(ctx);
         let mut i = 1;
         while i < self.selections.len() {
             if self.selections[i - 1]
@@ -651,14 +651,14 @@ impl BufferView {
         self.selections
             .first()
             .unwrap()
-            .display_range(self.display_map.as_ref(app), app)
+            .display_range(self.display_map.read(app), app)
     }
 
     pub fn last_selection(&self, app: &AppContext) -> Range<DisplayPoint> {
         self.selections
             .last()
             .unwrap()
-            .display_range(self.display_map.as_ref(app), app)
+            .display_range(self.display_map.read(app), app)
     }
 
     pub fn selections_in_range<'a>(
@@ -666,7 +666,7 @@ impl BufferView {
         range: Range<DisplayPoint>,
         app: &'a AppContext,
     ) -> impl 'a + Iterator<Item = Range<DisplayPoint>> {
-        let map = self.display_map.as_ref(app);
+        let map = self.display_map.read(app);
 
         let start = map.anchor_before(range.start, Bias::Left, app).unwrap();
         let start_index = self.selection_insertion_index(&start, app);
@@ -686,7 +686,7 @@ impl BufferView {
     }
 
     fn selection_insertion_index(&self, start: &Anchor, app: &AppContext) -> usize {
-        let buffer = self.buffer.as_ref(app);
+        let buffer = self.buffer.read(app);
 
         match self
             .selections
@@ -720,7 +720,7 @@ impl BufferView {
         let mut fold_ranges = Vec::new();
 
         let app = ctx.app();
-        let map = self.display_map.as_ref(app);
+        let map = self.display_map.read(app);
         for selection in &self.selections {
             let (start, end) = selection.display_range(map, app).sorted();
             let buffer_start_row = start.to_buffer_point(map, Bias::Left, app).unwrap().row;
@@ -750,8 +750,8 @@ impl BufferView {
         use super::RangeExt;
 
         let app = ctx.app();
-        let map = self.display_map.as_ref(app);
-        let buffer = self.buffer.as_ref(app);
+        let map = self.display_map.read(app);
+        let buffer = self.buffer.read(app);
         let ranges = self
             .selections
             .iter()
@@ -796,7 +796,7 @@ impl BufferView {
         let mut is_blank = true;
         for c in self
             .display_map
-            .as_ref(app)
+            .read(app)
             .chars_at(DisplayPoint::new(display_row, 0), app)?
         {
             if c == ' ' {
@@ -810,7 +810,7 @@ impl BufferView {
     }
 
     fn foldable_range_for_line(&self, start_row: u32, app: &AppContext) -> Result<Range<Point>> {
-        let map = self.display_map.as_ref(app);
+        let map = self.display_map.read(app);
         let max_point = self.max_point(app);
 
         let (start_indent, _) = self.line_indent(start_row, app)?;
@@ -831,7 +831,7 @@ impl BufferView {
 
     pub fn fold_selected_ranges(&mut self, _: &(), ctx: &mut ViewContext<Self>) {
         self.display_map.update(ctx, |map, ctx| {
-            let buffer = self.buffer.as_ref(ctx);
+            let buffer = self.buffer.read(ctx);
             let ranges = self
                 .selections
                 .iter()
@@ -842,23 +842,23 @@ impl BufferView {
     }
 
     pub fn line(&self, display_row: u32, app: &AppContext) -> Result<String> {
-        self.display_map.as_ref(app).line(display_row, app)
+        self.display_map.read(app).line(display_row, app)
     }
 
     pub fn line_len(&self, display_row: u32, app: &AppContext) -> Result<u32> {
-        self.display_map.as_ref(app).line_len(display_row, app)
+        self.display_map.read(app).line_len(display_row, app)
     }
 
     pub fn rightmost_point(&self, app: &AppContext) -> DisplayPoint {
-        self.display_map.as_ref(app).rightmost_point()
+        self.display_map.read(app).rightmost_point()
     }
 
     pub fn max_point(&self, app: &AppContext) -> DisplayPoint {
-        self.display_map.as_ref(app).max_point(app)
+        self.display_map.read(app).max_point(app)
     }
 
     pub fn text(&self, app: &AppContext) -> String {
-        self.display_map.as_ref(app).text(app)
+        self.display_map.read(app).text(app)
     }
 
     pub fn font_size(&self) -> f32 {
@@ -902,7 +902,7 @@ impl BufferView {
         let font_size = settings.buffer_font_size;
         let font_id =
             font_cache.select_font(settings.buffer_font_family, &FontProperties::new())?;
-        let digit_count = ((self.buffer.as_ref(app).max_point().row + 1) as f32)
+        let digit_count = ((self.buffer.read(app).max_point().row + 1) as f32)
             .log10()
             .floor() as usize
             + 1;
@@ -923,7 +923,7 @@ impl BufferView {
         layout_cache: &TextLayoutCache,
         app: &AppContext,
     ) -> Result<Vec<Arc<text_layout::Line>>> {
-        let display_map = self.display_map.as_ref(app);
+        let display_map = self.display_map.read(app);
 
         let settings = smol::block_on(self.settings.read());
         let font_size = settings.buffer_font_size;
@@ -959,7 +959,7 @@ impl BufferView {
         layout_cache: &TextLayoutCache,
         app: &AppContext,
     ) -> Result<Vec<Arc<text_layout::Line>>> {
-        let display_map = self.display_map.as_ref(app);
+        let display_map = self.display_map.read(app);
 
         rows.end = cmp::min(rows.end, display_map.max_point(app).row() + 1);
         if rows.start >= rows.end {
@@ -1149,7 +1149,7 @@ impl workspace::ItemView for BufferView {
     }
 
     fn title(&self, app: &AppContext) -> std::string::String {
-        if let Some(path) = self.buffer.as_ref(app).path(app) {
+        if let Some(path) = self.buffer.read(app).path(app) {
             path.file_name()
                 .expect("buffer's path is always to a file")
                 .to_string_lossy()
@@ -1160,7 +1160,7 @@ impl workspace::ItemView for BufferView {
     }
 
     fn entry_id(&self, app: &AppContext) -> Option<(usize, usize)> {
-        self.buffer.as_ref(app).entry_id()
+        self.buffer.read(app).entry_id()
     }
 
     fn clone_on_split(&self, ctx: &mut ViewContext<Self>) -> Option<Self>
@@ -1177,7 +1177,7 @@ impl workspace::ItemView for BufferView {
     }
 
     fn is_dirty(&self, ctx: &AppContext) -> bool {
-        self.buffer.as_ref(ctx).is_dirty()
+        self.buffer.read(ctx).is_dirty()
     }
 }
 
@@ -1255,7 +1255,7 @@ mod tests {
                 view.begin_selection(DisplayPoint::new(2, 2), false, ctx);
             });
 
-            let view = buffer_view.as_ref(app);
+            let view = buffer_view.read(app);
             let selections = view
                 .selections_in_range(
                     DisplayPoint::zero()..view.max_point(app.as_ref()),
@@ -1271,7 +1271,7 @@ mod tests {
                 view.update_selection(DisplayPoint::new(3, 3), Vector2F::zero(), ctx);
             });
 
-            let view = buffer_view.as_ref(app);
+            let view = buffer_view.read(app);
             let selections = view
                 .selections_in_range(
                     DisplayPoint::zero()..view.max_point(app.as_ref()),
@@ -1287,7 +1287,7 @@ mod tests {
                 view.update_selection(DisplayPoint::new(1, 1), Vector2F::zero(), ctx);
             });
 
-            let view = buffer_view.as_ref(app);
+            let view = buffer_view.read(app);
             let selections = view
                 .selections_in_range(
                     DisplayPoint::zero()..view.max_point(app.as_ref()),
@@ -1304,7 +1304,7 @@ mod tests {
                 view.update_selection(DisplayPoint::new(3, 3), Vector2F::zero(), ctx);
             });
 
-            let view = buffer_view.as_ref(app);
+            let view = buffer_view.read(app);
             let selections = view
                 .selections_in_range(
                     DisplayPoint::zero()..view.max_point(app.as_ref()),
@@ -1321,7 +1321,7 @@ mod tests {
                 view.update_selection(DisplayPoint::new(0, 0), Vector2F::zero(), ctx);
             });
 
-            let view = buffer_view.as_ref(app);
+            let view = buffer_view.read(app);
             let selections = view
                 .selections_in_range(
                     DisplayPoint::zero()..view.max_point(app.as_ref()),
@@ -1340,7 +1340,7 @@ mod tests {
                 view.end_selection(ctx);
             });
 
-            let view = buffer_view.as_ref(app);
+            let view = buffer_view.read(app);
             let selections = view
                 .selections_in_range(
                     DisplayPoint::zero()..view.max_point(app.as_ref()),
@@ -1367,7 +1367,7 @@ mod tests {
                 app.add_window(|ctx| BufferView::for_buffer(buffer.clone(), settings, ctx));
 
             let layouts = view
-                .as_ref(app)
+                .read(app)
                 .layout_line_numbers(1000.0, &font_cache, &layout_cache, app.as_ref())
                 .unwrap();
             assert_eq!(layouts.len(), 6);
@@ -1460,7 +1460,7 @@ mod tests {
                 );
 
                 view.unfold(&(), ctx);
-                assert_eq!(view.text(ctx.app()), buffer.as_ref(ctx).text());
+                assert_eq!(view.text(ctx.app()), buffer.read(ctx).text());
             });
         });
     }
@@ -1529,7 +1529,7 @@ mod tests {
             });
 
             assert_eq!(
-                buffer.as_ref(app).text(),
+                buffer.read(app).text(),
                 "oe two three\nfou five six\nseven ten\n"
             );
         })

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

@@ -22,7 +22,7 @@ pub struct FoldMap {
 
 impl FoldMap {
     pub fn new(buffer: ModelHandle<Buffer>, app: &AppContext) -> Self {
-        let text_summary = buffer.as_ref(app).text_summary();
+        let text_summary = buffer.read(app).text_summary();
         Self {
             buffer,
             folds: Vec::new(),
@@ -72,7 +72,7 @@ impl FoldMap {
         let offset = self.to_display_offset(point, app)?;
         let mut cursor = self.transforms.cursor();
         cursor.seek(&offset, SeekBias::Right);
-        let buffer = self.buffer.as_ref(app);
+        let buffer = self.buffer.read(app);
         Ok(Chars {
             cursor,
             offset: offset.0,
@@ -95,7 +95,7 @@ impl FoldMap {
         app: &AppContext,
     ) -> Result<()> {
         let mut edits = Vec::new();
-        let buffer = self.buffer.as_ref(app);
+        let buffer = self.buffer.read(app);
         for range in ranges.into_iter() {
             let start = range.start.to_offset(buffer)?;
             let end = range.end.to_offset(buffer)?;
@@ -124,7 +124,7 @@ impl FoldMap {
         ranges: impl IntoIterator<Item = Range<T>>,
         app: &AppContext,
     ) -> Result<()> {
-        let buffer = self.buffer.as_ref(app);
+        let buffer = self.buffer.read(app);
 
         let mut edits = Vec::new();
         for range in ranges.into_iter() {
@@ -184,7 +184,7 @@ impl FoldMap {
                 .ok_or_else(|| anyhow!("display point {:?} is out of range", point))?;
             assert!(transform.display_text.is_none());
             let end_buffer_offset =
-                (cursor.start().buffer.lines + overshoot).to_offset(self.buffer.as_ref(app))?;
+                (cursor.start().buffer.lines + overshoot).to_offset(self.buffer.read(app))?;
             offset += end_buffer_offset - cursor.start().buffer.chars;
         }
         Ok(DisplayOffset(offset))
@@ -208,7 +208,7 @@ impl FoldMap {
     }
 
     pub fn apply_edits(&mut self, edits: &[Edit], app: &AppContext) -> Result<()> {
-        let buffer = self.buffer.as_ref(app);
+        let buffer = self.buffer.read(app);
         let mut edits = edits.iter().cloned().peekable();
 
         let mut new_transforms = SumTree::new();
@@ -597,7 +597,7 @@ mod tests {
                 let mut map = FoldMap::new(buffer.clone(), app.as_ref());
 
                 {
-                    let buffer = buffer.as_ref(app);
+                    let buffer = buffer.read(app);
 
                     let fold_count = rng.gen_range(0..10);
                     let mut fold_ranges: Vec<Range<usize>> = Vec::new();
@@ -632,7 +632,7 @@ mod tests {
 
                 map.apply_edits(&edits, app.as_ref()).unwrap();
 
-                let buffer = map.buffer.as_ref(app);
+                let buffer = map.buffer.read(app);
                 let mut expected_text = buffer.text();
                 let mut expected_buffer_rows = Vec::new();
                 let mut next_row = buffer.max_point().row;
@@ -694,7 +694,7 @@ mod tests {
         }
 
         fn merged_fold_ranges(&self, app: &AppContext) -> Vec<Range<usize>> {
-            let buffer = self.buffer.as_ref(app);
+            let buffer = self.buffer.read(app);
             let mut fold_ranges = self
                 .folds
                 .iter()

zed/src/editor/display_map/mod.rs 🔗

@@ -108,7 +108,7 @@ impl DisplayMap {
         app: &AppContext,
     ) -> Result<Anchor> {
         self.buffer
-            .as_ref(app)
+            .read(app)
             .anchor_before(point.to_buffer_point(self, bias, app)?)
     }
 
@@ -119,7 +119,7 @@ impl DisplayMap {
         app: &AppContext,
     ) -> Result<Anchor> {
         self.buffer
-            .as_ref(app)
+            .read(app)
             .anchor_after(point.to_buffer_point(self, bias, app)?)
     }
 
@@ -206,7 +206,7 @@ impl Point {
 
 impl Anchor {
     pub fn to_display_point(&self, map: &DisplayMap, app: &AppContext) -> Result<DisplayPoint> {
-        self.to_point(map.buffer.as_ref(app))?
+        self.to_point(map.buffer.read(app))?
             .to_display_point(map, app)
     }
 }
@@ -314,7 +314,7 @@ mod tests {
                 })
                 .unwrap();
 
-            let map = map.as_ref(app);
+            let map = map.read(app);
             assert_eq!(
                 map.chars_at(DisplayPoint::new(1, 0), app.as_ref())
                     .unwrap()
@@ -368,7 +368,7 @@ mod tests {
             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.as_ref(app).max_point(app.as_ref()),
+                map.read(app).max_point(app.as_ref()),
                 DisplayPoint::new(1, 11)
             )
         });

zed/src/file_finder.rs 🔗

@@ -114,7 +114,7 @@ impl FileFinder {
             self.matches.len(),
             move |mut range, items, app| {
                 let finder = handle.upgrade(app).unwrap();
-                let finder = finder.as_ref(app);
+                let finder = finder.read(app);
                 let start = range.start;
                 range.end = cmp::min(range.end, finder.matches.len());
                 items.extend(finder.matches[range].iter().enumerate().filter_map(
@@ -287,7 +287,7 @@ impl FileFinder {
     }
 
     fn workspace_updated(&mut self, _: ModelHandle<Workspace>, ctx: &mut ViewContext<Self>) {
-        self.spawn_search(self.query_buffer.as_ref(ctx).text(ctx.app()), ctx);
+        self.spawn_search(self.query_buffer.read(ctx).text(ctx.app()), ctx);
     }
 
     fn on_query_buffer_event(
@@ -299,7 +299,7 @@ impl FileFinder {
         use buffer_view::Event::*;
         match event {
             Edited => {
-                let query = self.query_buffer.as_ref(ctx).text(ctx.app());
+                let query = self.query_buffer.read(ctx).text(ctx.app());
                 if query.is_empty() {
                     self.latest_search_id = util::post_inc(&mut self.search_count);
                     self.matches.clear();
@@ -371,18 +371,18 @@ impl FileFinder {
 
     fn worktree<'a>(&'a self, tree_id: usize, app: &'a AppContext) -> Option<&'a Worktree> {
         self.workspace
-            .as_ref(app)
+            .read(app)
             .worktrees()
             .get(&tree_id)
-            .map(|worktree| worktree.as_ref(app))
+            .map(|worktree| worktree.read(app))
     }
 
     fn worktrees(&self, app: &AppContext) -> Vec<Worktree> {
         self.workspace
-            .as_ref(app)
+            .read(app)
             .worktrees()
             .iter()
-            .map(|worktree| worktree.as_ref(app).clone())
+            .map(|worktree| worktree.read(app).clone())
             .collect()
     }
 }
@@ -400,7 +400,7 @@ mod tests {
 
     #[test]
     fn test_matching_paths() {
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let tmp_dir = TempDir::new("example").unwrap();
             fs::create_dir(tmp_dir.path().join("a")).await.unwrap();
             fs::write(tmp_dir.path().join("a/banana"), "banana")
@@ -409,8 +409,10 @@ mod tests {
             fs::write(tmp_dir.path().join("a/bandana"), "bandana")
                 .await
                 .unwrap();
-            super::init(app);
-            editor::init(app);
+            app.update(|ctx| {
+                super::init(ctx);
+                editor::init(ctx);
+            });
 
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let workspace = app.add_model(|ctx| Workspace::new(vec![tmp_dir.path().into()], ctx));
@@ -424,14 +426,16 @@ mod tests {
                 (),
             );
 
-            let finder = workspace_view
-                .as_ref(app)
-                .modal()
-                .cloned()
-                .unwrap()
-                .downcast::<FileFinder>()
-                .unwrap();
-            let query_buffer = finder.as_ref(app).query_buffer.clone();
+            let finder = app.read(|ctx| {
+                workspace_view
+                    .read(ctx)
+                    .modal()
+                    .cloned()
+                    .unwrap()
+                    .downcast::<FileFinder>()
+                    .unwrap()
+            });
+            let query_buffer = app.read(|ctx| finder.read(ctx).query_buffer.clone());
 
             let chain = vec![finder.id(), query_buffer.id()];
             app.dispatch_action(window_id, chain.clone(), "buffer:insert", "b".to_string());

zed/src/workspace/mod.rs 🔗

@@ -109,9 +109,9 @@ mod tests {
                 .unwrap();
             assert_eq!(
                 workspace_view_1
-                    .as_ref(app)
+                    .read(app)
                     .workspace
-                    .as_ref(app)
+                    .read(app)
                     .worktrees()
                     .len(),
                 2

zed/src/workspace/workspace.rs 🔗

@@ -101,7 +101,7 @@ impl Workspace {
     pub fn contains_path(&self, path: &Path, app: &AppContext) -> bool {
         self.worktrees
             .iter()
-            .any(|worktree| worktree.as_ref(app).contains_path(path))
+            .any(|worktree| worktree.read(app).contains_path(path))
     }
 
     pub fn open_paths(&mut self, paths: &[PathBuf], ctx: &mut ModelContext<Self>) {
@@ -112,7 +112,7 @@ impl Workspace {
 
     pub fn open_path<'a>(&'a mut self, path: PathBuf, ctx: &mut ModelContext<Self>) {
         for tree in self.worktrees.iter() {
-            if tree.as_ref(ctx).contains_path(&path) {
+            if tree.read(ctx).contains_path(&path) {
                 return;
             }
         }
@@ -200,18 +200,18 @@ impl Entity for Workspace {
 
 #[cfg(test)]
 pub trait WorkspaceHandle {
-    fn file_entries(&self, app: &mut MutableAppContext) -> Vec<(usize, usize)>;
+    fn file_entries(&self, app: &AppContext) -> Vec<(usize, usize)>;
 }
 
 #[cfg(test)]
 impl WorkspaceHandle for ModelHandle<Workspace> {
-    fn file_entries(&self, app: &mut MutableAppContext) -> Vec<(usize, usize)> {
-        self.as_ref(app)
+    fn file_entries(&self, app: &AppContext) -> Vec<(usize, usize)> {
+        self.read(app)
             .worktrees()
             .iter()
             .flat_map(|tree| {
                 let tree_id = tree.id();
-                tree.as_ref(app)
+                tree.read(app)
                     .files()
                     .map(move |file| (tree_id, file.entry_id))
             })
@@ -228,7 +228,7 @@ mod tests {
 
     #[test]
     fn test_open_entry() {
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let dir = temp_tree(json!({
                 "a": {
                     "aa": "aa contents",
@@ -240,12 +240,12 @@ mod tests {
             app.finish_pending_tasks().await; // Open and populate worktree.
 
             // Get the first file entry.
-            let tree = workspace.as_ref(app).worktrees.iter().next().unwrap();
-            let entry_id = tree.as_ref(app).files().next().unwrap().entry_id;
+            let tree = app.read(|ctx| workspace.read(ctx).worktrees.iter().next().unwrap().clone());
+            let entry_id = app.read(|ctx| tree.read(ctx).files().next().unwrap().entry_id);
             let entry = (tree.id(), entry_id);
 
             // Open the same entry twice before it finishes loading.
-            let (future_1, future_2) = workspace.update(app, |w, app| {
+            let (future_1, future_2) = workspace.update(&mut app, |w, app| {
                 (
                     w.open_entry(entry, app).unwrap(),
                     w.open_entry(entry, app).unwrap(),
@@ -258,7 +258,7 @@ mod tests {
 
             // Open the same entry again now that it has loaded
             let handle_3 = workspace
-                .update(app, |w, app| w.open_entry(entry, app).unwrap())
+                .update(&mut app, |w, app| w.open_entry(entry, app).unwrap())
                 .await
                 .unwrap();
 

zed/src/workspace/workspace_view.rs 🔗

@@ -54,11 +54,11 @@ pub trait ItemViewHandle: Send + Sync {
 
 impl<T: ItemView> ItemViewHandle for ViewHandle<T> {
     fn title(&self, app: &AppContext) -> String {
-        self.as_ref(app).title(app)
+        self.read(app).title(app)
     }
 
     fn entry_id(&self, app: &AppContext) -> Option<(usize, usize)> {
-        self.as_ref(app).entry_id(app)
+        self.read(app).entry_id(app)
     }
 
     fn boxed_clone(&self) -> Box<dyn ItemViewHandle> {
@@ -93,7 +93,7 @@ impl<T: ItemView> ItemViewHandle for ViewHandle<T> {
     }
 
     fn is_dirty(&self, ctx: &AppContext) -> bool {
-        self.as_ref(ctx).is_dirty(ctx)
+        self.read(ctx).is_dirty(ctx)
     }
 
     fn id(&self) -> usize {
@@ -154,7 +154,7 @@ impl WorkspaceView {
     }
 
     pub fn contains_paths(&self, paths: &[PathBuf], app: &AppContext) -> bool {
-        self.workspace.as_ref(app).contains_paths(paths, app)
+        self.workspace.read(app).contains_paths(paths, app)
     }
 
     pub fn open_paths(&self, paths: &[PathBuf], app: &mut MutableAppContext) {
@@ -228,8 +228,8 @@ impl WorkspaceView {
     }
 
     pub fn open_example_entry(&mut self, ctx: &mut ViewContext<Self>) {
-        if let Some(tree) = self.workspace.as_ref(ctx).worktrees().iter().next() {
-            if let Some(file) = tree.as_ref(ctx).files().next() {
+        if let Some(tree) = self.workspace.read(ctx).worktrees().iter().next() {
+            if let Some(file) = tree.read(ctx).files().next() {
                 info!("open_entry ({}, {})", tree.id(), file.entry_id);
                 self.open_entry((tree.id(), file.entry_id), ctx);
             } else {
@@ -322,7 +322,7 @@ impl WorkspaceView {
     ) -> ViewHandle<Pane> {
         let new_pane = self.add_pane(ctx);
         self.activate_pane(new_pane.clone(), ctx);
-        if let Some(item) = pane.as_ref(ctx).active_item() {
+        if let Some(item) = pane.read(ctx).active_item() {
             if let Some(clone) = item.clone_on_split(ctx.app_mut()) {
                 self.add_item(clone, ctx);
             }
@@ -394,7 +394,7 @@ mod tests {
 
     #[test]
     fn test_open_entry() {
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let dir = temp_tree(json!({
                 "a": {
                     "aa": "aa contents",
@@ -406,70 +406,78 @@ mod tests {
             let settings = settings::channel(&app.font_cache()).unwrap().1;
             let workspace = app.add_model(|ctx| Workspace::new(vec![dir.path().into()], ctx));
             app.finish_pending_tasks().await; // Open and populate worktree.
-            let entries = workspace.file_entries(app);
+            let entries = app.read(|ctx| workspace.file_entries(ctx));
 
             let (_, workspace_view) =
                 app.add_window(|ctx| WorkspaceView::new(workspace.clone(), settings, ctx));
 
             // Open the first entry
-            workspace_view.update(app, |w, ctx| w.open_entry(entries[0], ctx));
+            workspace_view.update(&mut app, |w, ctx| w.open_entry(entries[0], ctx));
             app.finish_pending_tasks().await;
 
-            assert_eq!(
-                workspace_view
-                    .as_ref(app)
-                    .active_pane()
-                    .as_ref(app)
-                    .items()
-                    .len(),
-                1
-            );
+            app.read(|ctx| {
+                assert_eq!(
+                    workspace_view
+                        .read(ctx)
+                        .active_pane()
+                        .read(ctx)
+                        .items()
+                        .len(),
+                    1
+                )
+            });
 
             // Open the second entry
-            workspace_view.update(app, |w, ctx| w.open_entry(entries[1], ctx));
+            workspace_view.update(&mut app, |w, ctx| w.open_entry(entries[1], ctx));
             app.finish_pending_tasks().await;
 
-            let active_pane = workspace_view.as_ref(app).active_pane().as_ref(app);
-            assert_eq!(active_pane.items().len(), 2);
-            assert_eq!(
-                active_pane.active_item().unwrap().entry_id(app.as_ref()),
-                Some(entries[1])
-            );
+            app.read(|ctx| {
+                let active_pane = workspace_view.read(ctx).active_pane().read(ctx);
+                assert_eq!(active_pane.items().len(), 2);
+                assert_eq!(
+                    active_pane.active_item().unwrap().entry_id(ctx),
+                    Some(entries[1])
+                );
+            });
 
             // Open the first entry again
-            workspace_view.update(app, |w, ctx| w.open_entry(entries[0], ctx));
+            workspace_view.update(&mut app, |w, ctx| w.open_entry(entries[0], ctx));
             app.finish_pending_tasks().await;
 
-            let active_pane = workspace_view.as_ref(app).active_pane().as_ref(app);
-            assert_eq!(active_pane.items().len(), 2);
-            assert_eq!(
-                active_pane.active_item().unwrap().entry_id(app.as_ref()),
-                Some(entries[0])
-            );
+            app.read(|ctx| {
+                let active_pane = workspace_view.read(ctx).active_pane().read(ctx);
+                assert_eq!(active_pane.items().len(), 2);
+                assert_eq!(
+                    active_pane.active_item().unwrap().entry_id(ctx),
+                    Some(entries[0])
+                );
+            });
 
             // Open the third entry twice concurrently
-            workspace_view.update(app, |w, ctx| {
+            workspace_view.update(&mut app, |w, ctx| {
                 w.open_entry(entries[2], ctx);
                 w.open_entry(entries[2], ctx);
             });
             app.finish_pending_tasks().await;
 
-            assert_eq!(
-                workspace_view
-                    .as_ref(app)
-                    .active_pane()
-                    .as_ref(app)
-                    .items()
-                    .len(),
-                3
-            );
+            app.read(|ctx| {
+                assert_eq!(
+                    workspace_view
+                        .read(ctx)
+                        .active_pane()
+                        .read(ctx)
+                        .items()
+                        .len(),
+                    3
+                );
+            });
         });
     }
 
     #[test]
     fn test_pane_actions() {
-        App::test_async((), |app| async move {
-            pane::init(app);
+        App::test_async((), |mut app| async move {
+            app.update(|ctx| pane::init(ctx));
 
             let dir = temp_tree(json!({
                 "a": {
@@ -479,37 +487,41 @@ mod tests {
                 },
             }));
 
-            let settings = settings::channel(app.font_cache()).unwrap().1;
+            let settings = settings::channel(&app.font_cache()).unwrap().1;
             let workspace = app.add_model(|ctx| Workspace::new(vec![dir.path().into()], ctx));
             app.finish_pending_tasks().await; // Open and populate worktree.
-            let entries = workspace.file_entries(app);
+            let entries = app.read(|ctx| workspace.file_entries(ctx));
 
             let (window_id, workspace_view) =
                 app.add_window(|ctx| WorkspaceView::new(workspace.clone(), settings, ctx));
 
-            workspace_view.update(app, |w, ctx| w.open_entry(entries[0], ctx));
+            workspace_view.update(&mut app, |w, ctx| w.open_entry(entries[0], ctx));
             app.finish_pending_tasks().await;
 
-            let pane_1 = workspace_view.as_ref(app).active_pane().clone();
+            let pane_1 = app.read(|ctx| workspace_view.read(ctx).active_pane().clone());
 
             app.dispatch_action(window_id, vec![pane_1.id()], "pane:split_right", ());
-            let pane_2 = workspace_view.as_ref(app).active_pane().clone();
-            assert_ne!(pane_1, pane_2);
-
-            assert_eq!(
-                pane_2
-                    .as_ref(app)
-                    .active_item()
-                    .unwrap()
-                    .entry_id(app.downgrade()),
-                Some(entries[0])
-            );
-
-            app.dispatch_action(window_id, vec![pane_2.id()], "pane:close_active_item", ());
-
-            let w = workspace_view.as_ref(app);
-            assert_eq!(w.panes.len(), 1);
-            assert_eq!(w.active_pane(), &pane_1);
+            app.update(|ctx| {
+                let pane_2 = workspace_view.read(ctx).active_pane().clone();
+                assert_ne!(pane_1, pane_2);
+
+                assert_eq!(
+                    pane_2
+                        .read(ctx)
+                        .active_item()
+                        .unwrap()
+                        .entry_id(ctx.as_ref()),
+                    Some(entries[0])
+                );
+
+                ctx.dispatch_action(window_id, vec![pane_2.id()], "pane:close_active_item", ());
+            });
+
+            app.read(|ctx| {
+                let w = workspace_view.read(ctx);
+                assert_eq!(w.panes.len(), 1);
+                assert_eq!(w.active_pane(), &pane_1);
+            })
         });
     }
 }

zed/src/worktree/worktree.rs 🔗

@@ -409,7 +409,7 @@ pub trait WorktreeHandle {
 
 impl WorktreeHandle for ModelHandle<Worktree> {
     fn file(&self, entry_id: usize, app: &AppContext) -> Result<FileHandle> {
-        if entry_id >= self.as_ref(app).entry_count() {
+        if entry_id >= self.read(app).entry_count() {
             return Err(anyhow!("Entry does not exist in tree"));
         }
 
@@ -461,15 +461,15 @@ pub struct FileHandle {
 
 impl FileHandle {
     pub fn path(&self, app: &AppContext) -> PathBuf {
-        self.worktree.as_ref(app).entry_path(self.entry_id).unwrap()
+        self.worktree.read(app).entry_path(self.entry_id).unwrap()
     }
 
     pub fn load_history(&self, app: &AppContext) -> impl Future<Output = Result<History>> {
-        self.worktree.as_ref(app).load_history(self.entry_id)
+        self.worktree.read(app).load_history(self.entry_id)
     }
 
     pub fn save<'a>(&self, content: Snapshot, ctx: &AppContext) -> Task<Result<()>> {
-        let worktree = self.worktree.as_ref(ctx);
+        let worktree = self.worktree.read(ctx);
         worktree.save(self.entry_id, content, ctx)
     }
 
@@ -649,7 +649,7 @@ mod test {
 
     #[test]
     fn test_populate_and_search() {
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let dir = temp_tree(json!({
                 "root": {
                     "apple": "",
@@ -671,26 +671,28 @@ mod test {
             let tree = app.add_model(|ctx| Worktree::new(1, root_link_path, Some(ctx)));
             app.finish_pending_tasks().await;
 
-            let tree = tree.as_ref(app);
-            assert_eq!(tree.file_count(), 4);
-            let results = match_paths(&[tree.clone()], "bna", false, false, 10)
-                .iter()
-                .map(|result| tree.entry_path(result.entry_id))
-                .collect::<Result<Vec<PathBuf>, _>>()
-                .unwrap();
-            assert_eq!(
-                results,
-                vec![
-                    PathBuf::from("root_link/banana/carrot/date"),
-                    PathBuf::from("root_link/banana/carrot/endive"),
-                ]
-            );
+            app.read(|ctx| {
+                let tree = tree.read(ctx);
+                assert_eq!(tree.file_count(), 4);
+                let results = match_paths(&[tree.clone()], "bna", false, false, 10)
+                    .iter()
+                    .map(|result| tree.entry_path(result.entry_id))
+                    .collect::<Result<Vec<PathBuf>, _>>()
+                    .unwrap();
+                assert_eq!(
+                    results,
+                    vec![
+                        PathBuf::from("root_link/banana/carrot/date"),
+                        PathBuf::from("root_link/banana/carrot/endive"),
+                    ]
+                );
+            })
         });
     }
 
     #[test]
     fn test_save_file() {
-        App::test_async((), |app| async move {
+        App::test_async((), |mut app| async move {
             let dir = temp_tree(json!({
                 "file1": "the old contents",
             }));
@@ -698,17 +700,23 @@ mod test {
             let tree = app.add_model(|ctx| Worktree::new(1, dir.path(), Some(ctx)));
             app.finish_pending_tasks().await;
 
-            let entry = tree.as_ref(app).files().next().unwrap();
-            assert_eq!(entry.path.file_name().unwrap(), "file1");
-            let file_id = entry.entry_id;
-
             let buffer = Buffer::new(1, "a line of text.\n".repeat(10 * 1024));
 
-            tree.update(app, |tree, ctx| {
+            let entry = app.read(|ctx| {
+                let entry = tree.read(ctx).files().next().unwrap();
+                assert_eq!(entry.path.file_name().unwrap(), "file1");
+                entry
+            });
+            let file_id = entry.entry_id;
+
+            tree.update(&mut app, |tree, ctx| {
                 smol::block_on(tree.save(file_id, buffer.snapshot(), ctx.app())).unwrap()
             });
 
-            let history = tree.as_ref(app).load_history(file_id).await.unwrap();
+            let history = app
+                .read(|ctx| tree.read(ctx).load_history(file_id))
+                .await
+                .unwrap();
             assert_eq!(history.base_text, buffer.text());
         });
     }