1 files changed, 125 insertions, 0 deletions
diff --git a/layout/xul/nsMenuBarFrame.h b/layout/xul/nsMenuBarFrame.h
new file mode 100644
index 000000000..676463c50
--- /dev/null
+++ b/layout/xul/nsMenuBarFrame.h
@@ -0,0 +1,125 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+//
+// nsMenuBarFrame
+//
+
+#ifndef nsMenuBarFrame_h__
+#define nsMenuBarFrame_h__
+
+#include "mozilla/Attributes.h"
+#include "nsIAtom.h"
+#include "nsCOMPtr.h"
+#include "nsBoxFrame.h"
+#include "nsMenuFrame.h"
+#include "nsMenuBarListener.h"
+#include "nsMenuParent.h"
+
+class nsIContent;
+
+nsIFrame* NS_NewMenuBarFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+
+class nsMenuBarFrame final : public nsBoxFrame, public nsMenuParent
+{
+public:
+  NS_DECL_QUERYFRAME_TARGET(nsMenuBarFrame)
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS
+
+  explicit nsMenuBarFrame(nsStyleContext* aContext);
+
+  // nsMenuParent interface
+  virtual nsMenuFrame* GetCurrentMenuItem() override;
+  NS_IMETHOD SetCurrentMenuItem(nsMenuFrame* aMenuItem) override;
+  virtual void CurrentMenuIsBeingDestroyed() override;
+  NS_IMETHOD ChangeMenuItem(nsMenuFrame* aMenuItem,
+                            bool aSelectFirstItem,
+                            bool aFromKey) override;
+
+  NS_IMETHOD SetActive(bool aActiveFlag) override; 
+
+  virtual bool IsMenuBar() override { return true; }
+  virtual bool IsContextMenu() override { return false; }
+  virtual bool IsActive() override { return mIsActive; }
+  virtual bool IsMenu() override { return false; }
+  virtual bool IsOpen() override { return true; } // menubars are considered always open
+
+  bool IsMenuOpen() { return mCurrentMenu && mCurrentMenu->IsOpen(); }
+
+  void InstallKeyboardNavigator();
+  void RemoveKeyboardNavigator();
+
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow) override;
+
+  virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+  virtual void LockMenuUntilClosed(bool aLock) override {}
+  virtual bool IsMenuLocked() override { return false; }
+
+// Non-interface helpers
+
+  // The 'stay active' flag is set when navigating from one top-level menu
+  // to another, to prevent the menubar from deactivating and submenus from
+  // firing extra DOMMenuItemActive events.
+  bool GetStayActive() { return mStayActive; }
+  void SetStayActive(bool aStayActive) { mStayActive = aStayActive; }
+
+  // Called when a menu on the menu bar is clicked on. Returns a menu if one
+  // needs to be closed.
+  nsMenuFrame* ToggleMenuActiveState();
+
+  bool IsActiveByKeyboard() { return mActiveByKeyboard; }
+  void SetActiveByKeyboard() { mActiveByKeyboard = true; }
+
+  // indicate that a menu on the menubar was closed. Returns true if the caller
+  // may deselect the menuitem.
+  virtual bool MenuClosed() override;
+
+  // Called when Enter is pressed while the menubar is focused. If the current
+  // menu is open, let the child handle the key.
+  nsMenuFrame* Enter(mozilla::WidgetGUIEvent* aEvent);
+
+  // Used to handle ALT+key combos
+  nsMenuFrame* FindMenuWithShortcut(nsIDOMKeyEvent* aKeyEvent);
+
+  virtual bool IsFrameOfType(uint32_t aFlags) const override
+  {
+    // Override bogus IsFrameOfType in nsBoxFrame.
+    if (aFlags & (nsIFrame::eReplacedContainsBlock | nsIFrame::eReplaced))
+      return false;
+    return nsBoxFrame::IsFrameOfType(aFlags);
+  }
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override
+  {
+      return MakeFrameName(NS_LITERAL_STRING("MenuBar"), aResult);
+  }
+#endif
+
+protected:
+  RefPtr<nsMenuBarListener> mMenuBarListener; // The listener that tells us about key and mouse events.
+
+  // flag that is temporarily set when switching from one menu on the menubar to another
+  // to indicate that the menubar should not be deactivated.
+  bool mStayActive;
+
+  bool mIsActive; // Whether or not the menu bar is active (a menu item is highlighted or shown).
+
+  // whether the menubar was made active via the keyboard.
+  bool mActiveByKeyboard;
+
+  // The current menu that is active (highlighted), which may not be open. This will
+  // be null if no menu is active.
+  nsMenuFrame* mCurrentMenu;
+
+  mozilla::dom::EventTarget* mTarget;
+
+}; // class nsMenuBarFrame
+
+#endif