295 lines
10 KiB
C++
295 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Original Author: David W. Hyatt (hyatt@netscape.com)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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//
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// nsMenuFrame
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//
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#ifndef nsMenuFrame_h__
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#define nsMenuFrame_h__
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#include "prtypes.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 "nsFrameList.h"
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#include "nsGkAtoms.h"
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#include "nsMenuParent.h"
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#include "nsXULPopupManager.h"
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#include "nsITimer.h"
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#include "nsIContent.h"
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nsIFrame* NS_NewMenuFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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nsIFrame* NS_NewMenuItemFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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class nsMenuBarFrame;
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#define NS_STATE_ACCELTEXT_IS_DERIVED NS_STATE_BOX_CHILD_RESERVED
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// the type of menuitem
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enum nsMenuType {
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// a normal menuitem where a command is carried out when activated
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eMenuType_Normal = 0,
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// a menuitem with a checkmark that toggles when activated
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eMenuType_Checkbox = 1,
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// a radio menuitem where only one of it and its siblings with the same
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// name attribute can be checked at a time
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eMenuType_Radio = 2
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};
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enum nsMenuListType {
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eNotMenuList, // not a menulist
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eReadonlyMenuList, // <menulist/>
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eEditableMenuList // <menulist editable="true"/>
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};
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class nsMenuFrame;
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/**
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* nsMenuTimerMediator is a wrapper around an nsMenuFrame which can be safely
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* passed to timers. The class is reference counted unlike the underlying
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* nsMenuFrame, so that it will exist as long as the timer holds a reference
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* to it. The callback is delegated to the contained nsMenuFrame as long as
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* the contained nsMenuFrame has not been destroyed.
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*/
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class nsMenuTimerMediator : public nsITimerCallback
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{
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public:
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nsMenuTimerMediator(nsMenuFrame* aFrame);
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~nsMenuTimerMediator();
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NS_DECL_ISUPPORTS
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NS_DECL_NSITIMERCALLBACK
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void ClearFrame();
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private:
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// Pointer to the wrapped frame.
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nsMenuFrame* mFrame;
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};
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class nsMenuFrame : public nsBoxFrame
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{
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public:
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nsMenuFrame(nsIPresShell* aShell, nsStyleContext* aContext);
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NS_DECL_QUERYFRAME_TARGET(nsMenuFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// nsIBox
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NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);
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virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState);
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virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState);
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NS_IMETHOD Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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#ifdef DEBUG_LAYOUT
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NS_IMETHOD SetDebug(nsBoxLayoutState& aState, bool aDebug);
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#endif
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// The following methods are all overridden so that the menupopup
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// can be stored in a separate list, so that it doesn't impact reflow of the
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// actual menu item at all.
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virtual nsFrameList GetChildList(ChildListID aList) const;
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virtual void GetChildLists(nsTArray<ChildList>* aLists) const;
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NS_IMETHOD SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList);
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virtual void DestroyFrom(nsIFrame* aDestructRoot);
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// Overridden to prevent events from going to children of the menu.
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NS_IMETHOD BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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// this method can destroy the frame
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NS_IMETHOD HandleEvent(nsPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus);
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NS_IMETHOD AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList);
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NS_IMETHOD InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList);
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NS_IMETHOD RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame);
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virtual nsIAtom* GetType() const { return nsGkAtoms::menuFrame; }
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NS_IMETHOD SelectMenu(bool aActivateFlag);
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virtual nsIScrollableFrame* GetScrollTargetFrame();
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/**
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* NOTE: OpenMenu will open the menu asynchronously.
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*/
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void OpenMenu(bool aSelectFirstItem);
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// CloseMenu closes the menu asynchronously
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void CloseMenu(bool aDeselectMenu);
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bool IsChecked() { return mChecked; }
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NS_IMETHOD GetActiveChild(nsIDOMElement** aResult);
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NS_IMETHOD SetActiveChild(nsIDOMElement* aChild);
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// called when the Enter key is pressed while the menuitem is the current
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// one in its parent popup. This will carry out the command attached to
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// the menuitem. If the menu should be opened, this frame will be returned,
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// otherwise null will be returned.
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nsMenuFrame* Enter(nsGUIEvent* aEvent);
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virtual void SetParent(nsIFrame* aParent);
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virtual nsMenuParent *GetMenuParent() { return mMenuParent; }
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const nsAString& GetRadioGroupName() { return mGroupName; }
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nsMenuType GetMenuType() { return mType; }
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nsMenuPopupFrame* GetPopup() { return mPopupFrame; }
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// nsMenuFrame methods
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bool IsOnMenuBar() { return mMenuParent && mMenuParent->IsMenuBar(); }
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bool IsOnActiveMenuBar() { return IsOnMenuBar() && mMenuParent->IsActive(); }
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virtual bool IsOpen();
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virtual bool IsMenu();
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nsMenuListType GetParentMenuListType();
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bool IsDisabled();
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void ToggleMenuState();
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// indiciate that the menu's popup has just been opened, so that the menu
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// can update its open state. This method modifies the open attribute on
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// the menu, so the frames could be gone after this call.
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void PopupOpened();
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// indiciate that the menu's popup has just been closed, so that the menu
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// can update its open state. The menu should be unhighlighted if
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// aDeselectedMenu is true. This method modifies the open attribute on
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// the menu, so the frames could be gone after this call.
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void PopupClosed(bool aDeselectMenu);
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// returns true if this is a menu on another menu popup. A menu is a submenu
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// if it has a parent popup or menupopup.
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bool IsOnMenu() { return mMenuParent && mMenuParent->IsMenu(); }
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void SetIsMenu(bool aIsMenu) { mIsMenu = aIsMenu; }
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("Menu"), aResult);
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}
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#endif
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static bool IsSizedToPopup(nsIContent* aContent, bool aRequireAlways);
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protected:
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friend class nsMenuTimerMediator;
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friend class nsASyncMenuInitialization;
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friend class nsMenuAttributeChangedEvent;
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// initialize mPopupFrame to the first popup frame within
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// aChildList. Removes the popup, if any, from aChildList.
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void SetPopupFrame(nsFrameList& aChildList);
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// set mMenuParent to the nearest enclosing menu bar or menupopup frame of
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// aParent (or aParent itself). This is called when initializing the frame,
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// so aParent should be the expected parent of this frame.
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void InitMenuParent(nsIFrame* aParent);
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// Update the menu's type (normal, checkbox, radio).
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// This method can destroy the frame.
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void UpdateMenuType(nsPresContext* aPresContext);
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// Update the checked state of the menu, and for radios, clear any other
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// checked items. This method can destroy the frame.
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void UpdateMenuSpecialState(nsPresContext* aPresContext);
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// Examines the key node and builds the accelerator.
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void BuildAcceleratorText(bool aNotify);
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// Called to execute our command handler. This method can destroy the frame.
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void Execute(nsGUIEvent *aEvent);
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// This method can destroy the frame
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NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType);
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virtual ~nsMenuFrame() { };
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bool SizeToPopup(nsBoxLayoutState& aState, nsSize& aSize);
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bool ShouldBlink();
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void StartBlinking(nsGUIEvent *aEvent, bool aFlipChecked);
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void StopBlinking();
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void CreateMenuCommandEvent(nsGUIEvent *aEvent, bool aFlipChecked);
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void PassMenuCommandEventToPopupManager();
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protected:
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#ifdef DEBUG_LAYOUT
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nsresult SetDebug(nsBoxLayoutState& aState, nsIFrame* aList, bool aDebug);
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#endif
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NS_HIDDEN_(nsresult) Notify(nsITimer* aTimer);
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bool mIsMenu; // Whether or not we can even have children or not.
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bool mChecked; // are we checked?
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bool mIgnoreAccelTextChange; // temporarily set while determining the accelerator key
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nsMenuType mType;
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nsMenuParent* mMenuParent; // Our parent menu.
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// the popup for this menu, owned
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nsMenuPopupFrame* mPopupFrame;
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// Reference to the mediator which wraps this frame.
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nsRefPtr<nsMenuTimerMediator> mTimerMediator;
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nsCOMPtr<nsITimer> mOpenTimer;
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nsCOMPtr<nsITimer> mBlinkTimer;
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PRUint8 mBlinkState; // 0: not blinking, 1: off, 2: on
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nsRefPtr<nsXULMenuCommandEvent> mDelayedMenuCommandEvent;
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nsString mGroupName;
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}; // class nsMenuFrame
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#endif
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