Links to channel notes (#7262)

Release Notes:

- Added outline support for Markdown files
- Added the ability to link to channel notes:
https://zed.dev/channel/zed-283/notes#Roadmap

crates/editor/src/editor.rs

@@ -413,6 +413,12 @@ pub struct Editor {
     editor_actions: Vec<Box<dyn Fn(&mut ViewContext<Self>)>>,
     show_copilot_suggestions: bool,
     use_autoclose: bool,
+    custom_context_menu: Option<
+        Box<
+            dyn 'static
+                + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
+        >,
+    >,
 }
 
 pub struct EditorSnapshot {
@@ -1476,6 +1482,7 @@ impl Editor {
             hovered_cursors: Default::default(),
             editor_actions: Default::default(),
             show_copilot_suggestions: mode == EditorMode::Full,
+            custom_context_menu: None,
             _subscriptions: vec![
                 cx.observe(&buffer, Self::on_buffer_changed),
                 cx.subscribe(&buffer, Self::on_buffer_event),
@@ -1665,6 +1672,14 @@ impl Editor {
         self.collaboration_hub = Some(hub);
     }
 
+    pub fn set_custom_context_menu(
+        &mut self,
+        f: impl 'static
+            + Fn(&mut Self, DisplayPoint, &mut ViewContext<Self>) -> Option<View<ui::ContextMenu>>,
+    ) {
+        self.custom_context_menu = Some(Box::new(f))
+    }
+
     pub fn set_completion_provider(&mut self, hub: Box<dyn CompletionProvider>) {
         self.completion_provider = Some(hub);
     }

crates/editor/src/mouse_context_menu.rs

@@ -25,31 +25,40 @@ pub fn deploy_context_menu(
         return;
     }
 
-    // Don't show the context menu if there isn't a project associated with this editor
-    if editor.project.is_none() {
-        return;
-    }
+    let context_menu = if let Some(custom) = editor.custom_context_menu.take() {
+        let menu = custom(editor, point, cx);
+        editor.custom_context_menu = Some(custom);
+        if menu.is_none() {
+            return;
+        }
+        menu.unwrap()
+    } else {
+        // Don't show the context menu if there isn't a project associated with this editor
+        if editor.project.is_none() {
+            return;
+        }
 
-    // Move the cursor to the clicked location so that dispatched actions make sense
-    editor.change_selections(None, cx, |s| {
-        s.clear_disjoint();
-        s.set_pending_display_range(point..point, SelectMode::Character);
-    });
+        // Move the cursor to the clicked location so that dispatched actions make sense
+        editor.change_selections(None, cx, |s| {
+            s.clear_disjoint();
+            s.set_pending_display_range(point..point, SelectMode::Character);
+        });
 
-    let context_menu = ui::ContextMenu::build(cx, |menu, _cx| {
-        menu.action("Rename Symbol", Box::new(Rename))
-            .action("Go to Definition", Box::new(GoToDefinition))
-            .action("Go to Type Definition", Box::new(GoToTypeDefinition))
-            .action("Find All References", Box::new(FindAllReferences))
-            .action(
-                "Code Actions",
-                Box::new(ToggleCodeActions {
-                    deployed_from_indicator: false,
-                }),
-            )
-            .separator()
-            .action("Reveal in Finder", Box::new(RevealInFinder))
-    });
+        ui::ContextMenu::build(cx, |menu, _cx| {
+            menu.action("Rename Symbol", Box::new(Rename))
+                .action("Go to Definition", Box::new(GoToDefinition))
+                .action("Go to Type Definition", Box::new(GoToTypeDefinition))
+                .action("Find All References", Box::new(FindAllReferences))
+                .action(
+                    "Code Actions",
+                    Box::new(ToggleCodeActions {
+                        deployed_from_indicator: false,
+                    }),
+                )
+                .separator()
+                .action("Reveal in Finder", Box::new(RevealInFinder))
+        })
+    };
     let context_menu_focus = context_menu.focus_handle(cx);
     cx.focus(&context_menu_focus);
 

crates/editor/src/scroll/autoscroll.rs

@@ -12,17 +12,26 @@ pub enum Autoscroll {
 }
 
 impl Autoscroll {
+    /// scrolls the minimal amount to (try) and fit all cursors onscreen
     pub fn fit() -> Self {
         Self::Strategy(AutoscrollStrategy::Fit)
     }
 
+    /// scrolls the minimal amount to fit the newest cursor
     pub fn newest() -> Self {
         Self::Strategy(AutoscrollStrategy::Newest)
     }
 
+    /// scrolls so the newest cursor is vertically centered
     pub fn center() -> Self {
         Self::Strategy(AutoscrollStrategy::Center)
     }
+
+    /// scrolls so the neweset cursor is near the top
+    /// (offset by vertical_scroll_margin)
+    pub fn focused() -> Self {
+        Self::Strategy(AutoscrollStrategy::Focused)
+    }
 }
 
 #[derive(PartialEq, Eq, Default, Clone, Copy)]
@@ -31,6 +40,7 @@ pub enum AutoscrollStrategy {
     Newest,
     #[default]
     Center,
+    Focused,
     Top,
     Bottom,
 }
@@ -155,6 +165,11 @@ impl Editor {
                 scroll_position.y = (target_top - margin).max(0.0);
                 self.set_scroll_position_internal(scroll_position, local, true, cx);
             }
+            AutoscrollStrategy::Focused => {
+                scroll_position.y =
+                    (target_top - self.scroll_manager.vertical_scroll_margin).max(0.0);
+                self.set_scroll_position_internal(scroll_position, local, true, cx);
+            }
             AutoscrollStrategy::Top => {
                 scroll_position.y = (target_top).max(0.0);
                 self.set_scroll_position_internal(scroll_position, local, true, cx);