1 files changed, 132 insertions, 0 deletions
diff --git a/layout/xul/nsMenuBarFrame.h b/layout/xul/nsMenuBarFrame.h
new file mode 100644
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+++ b/layout/xul/nsMenuBarFrame.h
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+/* -*- 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/. */
+
+//
+// nsMenuBarFrame
+//
+
+#ifndef nsMenuBarFrame_h__
+#define nsMenuBarFrame_h__
+
+#include "mozilla/Attributes.h"
+#include "nsAtom.h"
+#include "nsCOMPtr.h"
+#include "nsBoxFrame.h"
+#include "nsMenuFrame.h"
+#include "nsMenuBarListener.h"
+#include "nsMenuParent.h"
+
+class nsIContent;
+
+namespace mozilla {
+class PresShell;
+namespace dom {
+class KeyboardEvent;
+}  // namespace dom
+}  // namespace mozilla
+
+nsIFrame* NS_NewMenuBarFrame(mozilla::PresShell* aPresShell,
+                             mozilla::ComputedStyle* aStyle);
+
+class nsMenuBarFrame final : public nsBoxFrame, public nsMenuParent {
+ public:
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS(nsMenuBarFrame)
+
+  explicit nsMenuBarFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
+
+  // 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 {
+    // menubars are considered always open
+    return true;
+  }
+
+  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,
+                           PostDestroyData& aPostDestroyData) 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(mozilla::dom::KeyboardEvent* aKeyEvent,
+                                    bool aPeek);
+
+  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(u"MenuBar"_ns, 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;
+};  // class nsMenuBarFrame
+
+#endif