Add deleting in ex mode

src/bin.rs

@@ -171,11 +171,10 @@ fn main() {
                                             state.rcv_event(UIEvent { id: 0, event_type: UIEventType::ChangeMode(UIMode::Normal)});
                                             state.redraw();
                                         },
-                                        k @ Key::Char(_) => {
+                                        k => {
                                             state.rcv_event(UIEvent { id: 0, event_type: UIEventType::ExInput(k)});
                                             state.redraw();
                                         },
-                                        _ => {},
                                     }
                                 },
                                 UIMode::Fork => {

ui/src/components/utilities.rs

@@ -453,10 +453,12 @@ impl Component for StatusBar {
                 match m {
                     UIMode::Normal => {
                         self.height = 1;
-                        context.replies.push_back(UIEvent {
-                            id: 0,
-                            event_type: UIEventType::Command(self.ex_buffer.clone()),
-                        });
+                        if !self.ex_buffer.is_empty() {
+                            context.replies.push_back(UIEvent {
+                                id: 0,
+                                event_type: UIEventType::Command(self.ex_buffer.clone()),
+                            });
+                        }
                         self.ex_buffer.clear()
                     }
                     UIMode::Execute => {
@@ -469,6 +471,14 @@ impl Component for StatusBar {
                 self.dirty = true;
                 self.ex_buffer.push(*c);
             }
+            UIEventType::ExInput(Key::Ctrl('u')) => {
+                self.dirty = true;
+                self.ex_buffer.clear();
+            }
+            UIEventType::ExInput(Key::Backspace) | UIEventType::ExInput(Key::Ctrl('h')) => {
+                self.dirty = true;
+                self.ex_buffer.pop();
+            }
             UIEventType::Resize => {
                 self.dirty = true;
             }