gecko-dev/layout/generic/nsImageMap.h

134 lines
4.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* 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.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsImageMap_h___
#define nsImageMap_h___
#include "nsISupports.h"
#include "nsCoord.h"
#include "nsVoidArray.h"
#include "nsIDocumentObserver.h"
#include "nsIDOMFocusListener.h"
#include "nsIFrame.h"
#include "nsIImageMap.h"
#include "nsIHTMLContent.h"
class nsIDOMHTMLAreaElement;
class nsIDOMHTMLMapElement;
class nsIPresContext;
class nsIRenderingContext;
class nsIURI;
class nsString;
class nsIDOMEvent;
class nsImageMap : public nsIDocumentObserver, 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 NS_OK is returned and aAbsURL, aTarget, and
* aAltText are filled in with the values from the underlying area
* element. If the coordinates are not in the map then NS_NOT_INSIDE
* is returned.
*/
PRBool IsInside(nscoord aX, nscoord aY,
nsIContent** aContent,
nsAString& aAbsURL,
nsAString& aTarget,
nsAString& aAltText) const;
/**
* See if the given aX,aY <b>pixel</b> coordinates are in the image
* map. If they are then NS_OK is returned otherwise NS_NOT_INSIDE
* is returned.
*/
PRBool IsInside(nscoord aX, nscoord aY) const;
void Draw(nsIPresContext* aCX, 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
// nsIDocumentObserver
NS_DECL_NSIDOCUMENTOBSERVER
//nsIDOMFocusListener
NS_IMETHOD Focus(nsIDOMEvent* aEvent);
NS_IMETHOD Blur(nsIDOMEvent* aEvent);
NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);
//nsIImageMap
NS_IMETHOD GetBoundsForAreaContent(nsIContent *aContent,
nsIPresContext* aPresContext,
nsRect& aBounds);
protected:
virtual ~nsImageMap();
void FreeAreas();
nsresult UpdateAreas();
nsresult UpdateAreasForBlock(nsIContent* aParent, PRBool* aFoundAnchor);
static PRBool IsAncestorOf(nsIContent* aContent,
nsIContent* aAncestorContent);
nsresult AddArea(nsIContent* aArea);
nsresult ChangeFocus(nsIDOMEvent* aEvent, PRBool aFocus);
nsresult Invalidate(nsIPresContext* aPresContext, nsIFrame* aFrame, nsRect& aRect);
nsIPresShell* mPresShell; // WEAK - owns the frame that owns us
nsIFrame* mImageFrame; // the frame that owns us
nsIDocument* mDocument; // WEAK - the imagemap will not outlive the document
nsCOMPtr<nsIHTMLContent> mMap;
nsAutoVoidArray mAreas; // almost always has some entries
PRBool mContainsBlockContents;
};
#endif /* nsImageMap_h___ */