1 files changed, 78 insertions, 0 deletions
diff --git a/dom/xul/MenuBarListener.h b/dom/xul/MenuBarListener.h
new file mode 100644
index 0000000000..2985a77079
--- /dev/null
+++ b/dom/xul/MenuBarListener.h
@@ -0,0 +1,78 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef mozilla_dom_MenuBarListener_h
+#define mozilla_dom_MenuBarListener_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/EventForwards.h"
+#include "nsIDOMEventListener.h"
+
+namespace mozilla::dom {
+class Document;
+class EventTarget;
+class KeyboardEvent;
+class XULMenuBarElement;
+class XULButtonElement;
+
+class MenuBarListener final : public nsIDOMEventListener {
+ public:
+  explicit MenuBarListener(XULMenuBarElement&);
+
+  NS_DECL_ISUPPORTS
+
+  NS_DECL_NSIDOMEVENTLISTENER
+
+  // Should be called when unbound from the document and so on.
+  void Detach();
+
+ protected:
+  virtual ~MenuBarListener();
+
+  bool IsMenuOpen() const;
+
+  MOZ_CAN_RUN_SCRIPT nsresult KeyUp(Event* aMouseEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult KeyDown(Event* aMouseEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult KeyPress(Event* aMouseEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult Blur(Event* aEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult OnWindowDeactivated(Event* aEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult MouseDown(Event* aMouseEvent);
+  MOZ_CAN_RUN_SCRIPT nsresult Fullscreen(Event* aEvent);
+
+  /**
+   * Given a key event for an Alt+shortcut combination,
+   * return the menu, if any, that would be opened. If aPeek
+   * is false, then play a beep and deactivate the menubar on Windows.
+   */
+  XULButtonElement* GetMenuForKeyEvent(KeyboardEvent& aKeyEvent);
+
+  /**
+   * Call MarkAsReservedByChrome if the user's preferences indicate that
+   * the key should be chrome-only.
+   */
+  void ReserveKeyIfNeeded(Event* aKeyEvent);
+
+  // This should only be called by the MenuBarListener during event dispatch.
+  enum class ByKeyboard : bool { No, Yes };
+  MOZ_CAN_RUN_SCRIPT void ToggleMenuActiveState(ByKeyboard);
+
+  bool Destroyed() const { return !mMenuBar; }
+
+  // The menu bar object. Safe because it keeps us alive.
+  XULMenuBarElement* mMenuBar;
+  // The event target to listen to the events.
+  //
+  // Weak reference is safe because we clear the listener on unbind from the
+  // document.
+  Document* mEventTarget;
+  // Whether or not the ALT key is currently down.
+  bool mAccessKeyDown = false;
+  // Whether or not the ALT key down is canceled by other action.
+  bool mAccessKeyDownCanceled = false;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // #ifndef mozilla_dom_MenuBarListener_h