Add file picker dialogue when opening a directory with :o (#2707)

helix-term/src/commands/typed.rs

@@ -65,12 +65,28 @@ fn open(cx: &mut compositor::Context, args: &[Cow<str>], event: PromptEvent) ->
     ensure!(!args.is_empty(), "wrong argument count");
     for arg in args {
         let (path, pos) = args::parse_file(arg);
-        let _ = cx.editor.open(&path, Action::Replace)?;
-        let (view, doc) = current!(cx.editor);
-        let pos = Selection::point(pos_at_coords(doc.text().slice(..), pos, true));
-        doc.set_selection(view.id, pos);
-        // does not affect opening a buffer without pos
-        align_view(doc, view, Align::Center);
+        // If the path is a directory, open a file picker on that directory and update the status
+        // message
+        if std::fs::canonicalize(&path)?.is_dir() {
+            let callback = async move {
+                let call: job::Callback = job::Callback::EditorCompositor(Box::new(
+                    move |editor: &mut Editor, compositor: &mut Compositor| {
+                        let picker = ui::file_picker(path, &editor.config());
+                        compositor.push(Box::new(overlayed(picker)));
+                    },
+                ));
+                Ok(call)
+            };
+            cx.jobs.callback(callback);
+        } else {
+            // Otherwise, just open the file
+            let _ = cx.editor.open(&path, Action::Replace)?;
+            let (view, doc) = current!(cx.editor);
+            let pos = Selection::point(pos_at_coords(doc.text().slice(..), pos, true));
+            doc.set_selection(view.id, pos);
+            // does not affect opening a buffer without pos
+            align_view(doc, view, Align::Center);
+        }
     }
     Ok(())
 }