WIP

crates/diagnostics/src/diagnostics.rs

@@ -454,9 +454,9 @@ impl workspace::Item for ProjectDiagnosticsEditor {
         None
     }
 
-    fn navigate(&mut self, data: Box<dyn Any>, cx: &mut ViewContext<Self>) {
+    fn navigate(&mut self, data: Box<dyn Any>, cx: &mut ViewContext<Self>) -> bool {
         self.editor
-            .update(cx, |editor, cx| editor.navigate(data, cx));
+            .update(cx, |editor, cx| editor.navigate(data, cx))
     }
 
     fn is_dirty(&self, cx: &AppContext) -> bool {

crates/editor/src/items.rs

@@ -241,7 +241,7 @@ fn deserialize_selection(
 }
 
 impl Item for Editor {
-    fn navigate(&mut self, data: Box<dyn std::any::Any>, cx: &mut ViewContext<Self>) {
+    fn navigate(&mut self, data: Box<dyn std::any::Any>, cx: &mut ViewContext<Self>) -> bool {
         if let Some(data) = data.downcast_ref::<NavigationData>() {
             let buffer = self.buffer.read(cx).read(cx);
             let offset = if buffer.can_resolve(&data.anchor) {
@@ -249,11 +249,19 @@ impl Item for Editor {
             } else {
                 buffer.clip_offset(data.offset, Bias::Left)
             };
-
+            let newest_selection = self.newest_selection_with_snapshot::<usize>(&buffer);
             drop(buffer);
+
+            if newest_selection.head() == offset {
+                false
+            } else {
                 let nav_history = self.nav_history.take();
                 self.select_ranges([offset..offset], Some(Autoscroll::Fit), cx);
                 self.nav_history = nav_history;
+                true
+            }
+        } else {
+            false
         }
     }
 

crates/search/src/project_search.rs

@@ -302,9 +302,9 @@ impl Item for ProjectSearchView {
         });
     }
 
-    fn navigate(&mut self, data: Box<dyn Any>, cx: &mut ViewContext<Self>) {
+    fn navigate(&mut self, data: Box<dyn Any>, cx: &mut ViewContext<Self>) -> bool {
         self.results_editor
-            .update(cx, |editor, cx| editor.navigate(data, cx));
+            .update(cx, |editor, cx| editor.navigate(data, cx))
     }
 
     fn should_update_tab_on_event(event: &ViewEvent) -> bool {

crates/workspace/src/pane.rs

@@ -212,6 +212,7 @@ impl Pane {
         workspace.activate_pane(pane.clone(), cx);
 
         let to_load = pane.update(cx, |pane, cx| {
+            loop {
                 // Retrieve the weak item handle from the history.
                 let entry = pane.nav_history.borrow_mut().pop(mode)?;
 
@@ -229,23 +230,29 @@ impl Pane {
                             .set_mode(NavigationMode::Normal);
                     }
 
-                pane.active_item_index = index;
+                    let prev_active_index = mem::replace(&mut pane.active_item_index, index);
                     pane.focus_active_item(cx);
+                    let mut navigated = prev_active_index != pane.active_item_index;
                     if let Some(data) = entry.data {
-                    pane.active_item()?.navigate(data, cx);
+                        navigated |= pane.active_item()?.navigate(data, cx);
                     }
+
+                    if navigated {
                         cx.notify();
-                None
+                        break None;
+                    }
                 }
                 // If the item is no longer present in this pane, then retrieve its
                 // project path in order to reopen it.
                 else {
-                pane.nav_history
+                    break pane
+                        .nav_history
                         .borrow_mut()
                         .paths_by_item
                         .get(&entry.item.id())
                         .cloned()
-                    .map(|project_path| (project_path, entry))
+                        .map(|project_path| (project_path, entry));
+                }
             }
         });
 

crates/workspace/src/workspace.rs

@@ -203,7 +203,9 @@ pub struct JoinProjectParams {
 
 pub trait Item: View {
     fn deactivated(&mut self, _: &mut ViewContext<Self>) {}
-    fn navigate(&mut self, _: Box<dyn Any>, _: &mut ViewContext<Self>) {}
+    fn navigate(&mut self, _: Box<dyn Any>, _: &mut ViewContext<Self>) -> bool {
+        false
+    }
     fn tab_content(&self, style: &theme::Tab, cx: &AppContext) -> ElementBox;
     fn project_path(&self, cx: &AppContext) -> Option<ProjectPath>;
     fn project_entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
@@ -362,7 +364,7 @@ pub trait ItemHandle: 'static + fmt::Debug {
         cx: &mut ViewContext<Workspace>,
     );
     fn deactivated(&self, cx: &mut MutableAppContext);
-    fn navigate(&self, data: Box<dyn Any>, cx: &mut MutableAppContext);
+    fn navigate(&self, data: Box<dyn Any>, cx: &mut MutableAppContext) -> bool;
     fn id(&self) -> usize;
     fn to_any(&self) -> AnyViewHandle;
     fn is_dirty(&self, cx: &AppContext) -> bool;
@@ -510,8 +512,8 @@ impl<T: Item> ItemHandle for ViewHandle<T> {
         self.update(cx, |this, cx| this.deactivated(cx));
     }
 
-    fn navigate(&self, data: Box<dyn Any>, cx: &mut MutableAppContext) {
+    fn navigate(&self, data: Box<dyn Any>, cx: &mut MutableAppContext) -> bool {
-        self.update(cx, |this, cx| this.navigate(data, cx));
+        self.update(cx, |this, cx| this.navigate(data, cx))
     }
 
     fn save(&self, project: ModelHandle<Project>, cx: &mut MutableAppContext) -> Task<Result<()>> {