зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
3.6 KiB
C++
113 строки
3.6 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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*
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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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/* code for HTML client-side image maps */
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#ifndef nsImageMap_h
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#define nsImageMap_h
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#include "nsISupports.h"
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#include "nsCoord.h"
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#include "nsTArray.h"
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#include "nsStubMutationObserver.h"
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#include "nsIDOMEventListener.h"
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#include "nsIFrame.h"
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class Area;
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class nsIDOMEvent;
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class nsRenderingContext;
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class nsImageFrame;
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class nsImageMap : public nsStubMutationObserver,
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public nsIDOMEventListener
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{
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public:
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nsImageMap();
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nsresult Init(nsImageFrame* aImageFrame, nsIContent* aMap);
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/**
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* Return the first area element (in content order) for the given aX,aY pixel
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* coordinate or nsnull if the coordinate is outside all areas.
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*/
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nsIContent* GetArea(nscoord aX, nscoord aY) const;
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void Draw(nsIFrame* aFrame, nsRenderingContext& aRC);
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/**
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* Called just before the nsImageFrame releases us.
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* Used to break the cycle caused by the DOM listener.
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*/
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void Destroy();
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// nsISupports
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NS_DECL_ISUPPORTS
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// nsIMutationObserver
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NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
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NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED
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//nsIDOMEventListener
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NS_DECL_NSIDOMEVENTLISTENER
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nsresult GetBoundsForAreaContent(nsIContent *aContent,
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nsRect& aBounds);
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protected:
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virtual ~nsImageMap();
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void FreeAreas();
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nsresult UpdateAreas();
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nsresult SearchForAreas(nsIContent* aParent, bool& aFoundArea,
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bool& aFoundAnchor);
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nsresult AddArea(nsIContent* aArea);
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void MaybeUpdateAreas(nsIContent *aContent);
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nsImageFrame* mImageFrame; // the frame that owns us
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nsCOMPtr<nsIContent> mMap;
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nsAutoTArray<Area*, 8> mAreas; // almost always has some entries
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bool mContainsBlockContents;
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};
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#endif /* nsImageMap_h */
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