1 files changed, 83 insertions, 0 deletions
diff --git a/layout/xul/nsMenuBarFrame.h b/layout/xul/nsMenuBarFrame.h
new file mode 100644
index 0000000000..9601f8be2e
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+++ b/layout/xul/nsMenuBarFrame.h
@@ -0,0 +1,83 @@
+/* -*- 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 "nsAtom.h"
+#include "nsCOMPtr.h"
+#include "nsBoxFrame.h"
+#include "nsMenuBarListener.h"
+
+class nsIContent;
+
+namespace mozilla {
+class PresShell;
+namespace dom {
+class KeyboardEvent;
+class XULMenuParentElement;
+}  // namespace dom
+}  // namespace mozilla
+
+nsIFrame* NS_NewMenuBarFrame(mozilla::PresShell* aPresShell,
+                             mozilla::ComputedStyle* aStyle);
+
+class nsMenuBarFrame final : public nsBoxFrame {
+ public:
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS(nsMenuBarFrame)
+
+  explicit nsMenuBarFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
+
+  void InstallKeyboardNavigator();
+  void RemoveKeyboardNavigator();
+  MOZ_CAN_RUN_SCRIPT void MenuClosed();
+
+  void Init(nsIContent* aContent, nsContainerFrame* aParent,
+            nsIFrame* aPrevInFlow) override;
+
+  void DestroyFrom(nsIFrame* aDestructRoot,
+                   PostDestroyData& aPostDestroyData) override;
+
+  bool IsActiveByKeyboard() { return mActiveByKeyboard; }
+  void SetActiveByKeyboard() { mActiveByKeyboard = true; }
+  MOZ_CAN_RUN_SCRIPT void SetActive(bool aActive);
+  bool IsActive() const { return mIsActive; }
+
+  mozilla::dom::XULMenuParentElement& MenubarElement() const;
+
+  // Called when Enter is pressed while the menubar is focused. If the current
+  // menu is open, let the child handle the key.
+  MOZ_CAN_RUN_SCRIPT void HandleEnterKeyPress(mozilla::WidgetEvent&);
+
+  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
+  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.
+
+  bool mIsActive = false;  // 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 = false;
+};  // class nsMenuBarFrame
+
+#endif