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

helix-term/src/commands/typed.rs

@@ -65,6 +65,21 @@ 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);
+        // 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));
@@ -72,6 +87,7 @@ fn open(cx: &mut compositor::Context, args: &[Cow<str>], event: PromptEvent) ->
             // does not affect opening a buffer without pos
             align_view(doc, view, Align::Center);
         }
+    }
     Ok(())
 }