Start work on code actions

Just print out the returned code actions for now

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

crates/editor/src/editor.rs

@@ -124,6 +124,7 @@ action!(FoldSelectedRanges);
 action!(Scroll, Vector2F);
 action!(Select, SelectPhase);
 action!(ShowCompletions);
+action!(ShowCodeActions);
 action!(ConfirmCompletion, Option<usize>);
 
 pub fn init(cx: &mut MutableAppContext, path_openers: &mut Vec<Box<dyn PathOpener>>) {
@@ -239,6 +240,7 @@ pub fn init(cx: &mut MutableAppContext, path_openers: &mut Vec<Box<dyn PathOpene
         Binding::new("alt-cmd-]", Unfold, Some("Editor")),
         Binding::new("alt-cmd-f", FoldSelectedRanges, Some("Editor")),
         Binding::new("ctrl-space", ShowCompletions, Some("Editor")),
+        Binding::new("cmd-.", ShowCodeActions, Some("Editor")),
     ]);
 
     cx.add_action(Editor::open_new);
@@ -303,6 +305,7 @@ pub fn init(cx: &mut MutableAppContext, path_openers: &mut Vec<Box<dyn PathOpene
     cx.add_action(Editor::unfold);
     cx.add_action(Editor::fold_selected_ranges);
     cx.add_action(Editor::show_completions);
+    cx.add_action(Editor::show_code_actions);
     cx.add_action(
         |editor: &mut Editor, &ConfirmCompletion(ix): &ConfirmCompletion, cx| {
             if let Some(task) = editor.confirm_completion(ix, cx) {
@@ -1721,6 +1724,22 @@ impl Editor {
         self.completion_tasks.push((id, task));
     }
 
+    fn show_code_actions(&mut self, _: &ShowCodeActions, cx: &mut ViewContext<Self>) {
+        let position = if let Some(selection) = self.newest_anchor_selection() {
+            selection.head()
+        } else {
+            return;
+        };
+
+        let actions = self
+            .buffer
+            .update(cx, |buffer, cx| buffer.code_actions(position.clone(), cx));
+        cx.spawn(|this, cx| async move {
+            dbg!(actions.await.unwrap());
+        })
+        .detach();
+    }
+
     fn hide_completions(&mut self, cx: &mut ViewContext<Self>) -> Option<CompletionState> {
         cx.notify();
         self.completion_tasks.clear();

crates/editor/src/multi_buffer.rs

@@ -860,6 +860,21 @@ impl MultiBuffer {
         })
     }
 
+    pub fn code_actions<T>(
+        &self,
+        position: T,
+        cx: &mut ModelContext<Self>,
+    ) -> Task<Result<Vec<lsp::CodeAction>>>
+    where
+        T: ToOffset,
+    {
+        let anchor = self.read(cx).anchor_before(position);
+        let buffer = self.buffers.borrow()[&anchor.buffer_id].buffer.clone();
+        let code_actions =
+            buffer.update(cx, |buffer, cx| buffer.code_actions(anchor.text_anchor, cx));
+        cx.spawn(|this, cx| async move { code_actions.await })
+    }
+
     pub fn completions<T>(
         &self,
         position: T,