зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
4.1 KiB
C++
123 строки
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//
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// nsMenuBarFrame
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//
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#ifndef nsMenuBarFrame_h__
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#define nsMenuBarFrame_h__
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#include "mozilla/Attributes.h"
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#include "nsIAtom.h"
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#include "nsCOMPtr.h"
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#include "nsBoxFrame.h"
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#include "nsMenuFrame.h"
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#include "nsMenuBarListener.h"
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#include "nsMenuParent.h"
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class nsIContent;
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nsIFrame* NS_NewMenuBarFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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class nsMenuBarFrame final : public nsBoxFrame, public nsMenuParent
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{
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public:
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NS_DECL_QUERYFRAME_TARGET(nsMenuBarFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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explicit nsMenuBarFrame(nsStyleContext* aContext);
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// nsMenuParent interface
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virtual nsMenuFrame* GetCurrentMenuItem() override;
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NS_IMETHOD SetCurrentMenuItem(nsMenuFrame* aMenuItem) override;
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virtual void CurrentMenuIsBeingDestroyed() override;
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NS_IMETHOD ChangeMenuItem(nsMenuFrame* aMenuItem,
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bool aSelectFirstItem,
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bool aFromKey) override;
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NS_IMETHOD SetActive(bool aActiveFlag) override;
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virtual bool IsMenuBar() override { return true; }
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virtual bool IsContextMenu() override { return false; }
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virtual bool IsActive() override { return mIsActive; }
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virtual bool IsMenu() override { return false; }
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virtual bool IsOpen() override { return true; } // menubars are considered always open
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bool IsMenuOpen() { return mCurrentMenu && mCurrentMenu->IsOpen(); }
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void InstallKeyboardNavigator();
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void RemoveKeyboardNavigator();
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual void LockMenuUntilClosed(bool aLock) override {}
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virtual bool IsMenuLocked() override { return false; }
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// Non-interface helpers
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// The 'stay active' flag is set when navigating from one top-level menu
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// to another, to prevent the menubar from deactivating and submenus from
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// firing extra DOMMenuItemActive events.
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bool GetStayActive() { return mStayActive; }
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void SetStayActive(bool aStayActive) { mStayActive = aStayActive; }
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// Called when a menu on the menu bar is clicked on. Returns a menu if one
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// needs to be closed.
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nsMenuFrame* ToggleMenuActiveState();
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bool IsActiveByKeyboard() { return mActiveByKeyboard; }
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void SetActiveByKeyboard() { mActiveByKeyboard = true; }
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// indicate that a menu on the menubar was closed. Returns true if the caller
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// may deselect the menuitem.
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virtual bool MenuClosed() override;
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// Called when Enter is pressed while the menubar is focused. If the current
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// menu is open, let the child handle the key.
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nsMenuFrame* Enter(mozilla::WidgetGUIEvent* aEvent);
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// Used to handle ALT+key combos
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nsMenuFrame* FindMenuWithShortcut(nsIDOMKeyEvent* aKeyEvent);
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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// Override bogus IsFrameOfType in nsBoxFrame.
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if (aFlags & (nsIFrame::eReplacedContainsBlock | nsIFrame::eReplaced))
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return false;
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return nsBoxFrame::IsFrameOfType(aFlags);
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}
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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return MakeFrameName(NS_LITERAL_STRING("MenuBar"), aResult);
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}
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#endif
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protected:
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RefPtr<nsMenuBarListener> mMenuBarListener; // The listener that tells us about key and mouse events.
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// flag that is temporarily set when switching from one menu on the menubar to another
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// to indicate that the menubar should not be deactivated.
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bool mStayActive;
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bool mIsActive; // Whether or not the menu bar is active (a menu item is highlighted or shown).
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// whether the menubar was made active via the keyboard.
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bool mActiveByKeyboard;
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// The current menu that is active (highlighted), which may not be open. This will
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// be null if no menu is active.
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nsMenuFrame* mCurrentMenu;
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}; // class nsMenuBarFrame
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#endif
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