gecko-dev/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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* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
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* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
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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 "nsIDOMFocusListener.h"
#include "nsIFrame.h"
#include "nsIImageMap.h"
class nsIDOMHTMLAreaElement;
class nsIDOMHTMLMapElement;
class nsPresContext;
class nsIRenderingContext;
class nsIURI;
class nsString;
class nsIDOMEvent;
class Area;
class nsImageMap : public nsStubMutationObserver, public nsIDOMFocusListener,
public nsIImageMap
{
public:
nsImageMap();
nsresult Init(nsIPresShell* aPresShell, nsIFrame* aImageFrame, nsIDOMHTMLMapElement* aMap);
/**
* See if the given aX,aY <b>pixel</b> coordinates are in the image
* map. If they are then PR_TRUE is returned and aContent points to the
* found area. If the coordinates are not in the map then PR_FALSE
* is returned.
*/
PRBool IsInside(nscoord aX, nscoord aY,
nsIContent** aContent) const;
void Draw(nsIFrame* aFrame, nsIRenderingContext& aRC);
/**
* Called just before the nsImageFrame releases us.
* Used to break the cycle caused by the DOM listener.
*/
void Destroy(void);
// nsISupports
NS_DECL_ISUPPORTS
// nsIMutationObserver
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
//nsIDOMFocusListener
NS_IMETHOD Focus(nsIDOMEvent* aEvent);
NS_IMETHOD Blur(nsIDOMEvent* aEvent);
NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);
//nsIImageMap
NS_IMETHOD GetBoundsForAreaContent(nsIContent *aContent,
nsPresContext* aPresContext,
nsRect& aBounds);
protected:
virtual ~nsImageMap();
void FreeAreas();
nsresult UpdateAreas();
nsresult SearchForAreas(nsIContent* aParent, PRBool& aFoundArea,
PRBool& aFoundAnchor);
nsresult AddArea(nsIContent* aArea);
nsresult ChangeFocus(nsIDOMEvent* aEvent, PRBool aFocus);
void MaybeUpdateAreas(nsIContent *aContent);
nsIPresShell* mPresShell; // WEAK - owns the frame that owns us
nsIFrame* mImageFrame; // the frame that owns us
nsCOMPtr<nsIContent> mMap;
nsAutoTArray<Area*, 8> mAreas; // almost always has some entries
PRBool mContainsBlockContents;
};
#endif /* nsImageMap_h___ */