pjs/layout/generic/nsImageMap.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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*
* The Original Code is mozilla.org code.
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* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 1998
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* Contributor(s):
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/* code for HTML client-side image maps */
#ifndef nsImageMap_h
#define nsImageMap_h
#include "nsISupports.h"
#include "nsCoord.h"
#include "nsTArray.h"
#include "nsStubMutationObserver.h"
#include "nsIDOMEventListener.h"
#include "nsIFrame.h"
class Area;
class nsIDOMEvent;
class nsRenderingContext;
class nsImageFrame;
class nsImageMap : public nsStubMutationObserver,
public nsIDOMEventListener
{
public:
nsImageMap();
nsresult Init(nsImageFrame* aImageFrame, nsIContent* aMap);
/**
* Return the first area element (in content order) for the given aX,aY pixel
* coordinate or nsnull if the coordinate is outside all areas.
*/
nsIContent* GetArea(nscoord aX, nscoord aY) const;
void Draw(nsIFrame* aFrame, nsRenderingContext& aRC);
/**
* Called just before the nsImageFrame releases us.
* Used to break the cycle caused by the DOM listener.
*/
void Destroy();
// nsISupports
NS_DECL_ISUPPORTS
// nsIMutationObserver
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED
//nsIDOMEventListener
NS_DECL_NSIDOMEVENTLISTENER
nsresult GetBoundsForAreaContent(nsIContent *aContent,
nsRect& aBounds);
protected:
virtual ~nsImageMap();
void FreeAreas();
nsresult UpdateAreas();
nsresult SearchForAreas(nsIContent* aParent, bool& aFoundArea,
bool& aFoundAnchor);
nsresult AddArea(nsIContent* aArea);
void MaybeUpdateAreas(nsIContent *aContent);
nsImageFrame* mImageFrame; // the frame that owns us
nsCOMPtr<nsIContent> mMap;
nsAutoTArray<Area*, 8> mAreas; // almost always has some entries
bool mContainsBlockContents;
};
#endif /* nsImageMap_h */