pjs/layout/generic/nsImageMap.h

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C
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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/
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*
* 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.
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*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
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*/
#ifndef nsImageMap_h___
#define nsImageMap_h___
#include "nslayout.h"
#include "nsISupports.h"
#include "nsCoord.h"
#include "nsVoidArray.h"
#include "nsIDocumentObserver.h"
#include "nsIDOMFocusListener.h"
#include "nsIFrame.h"
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class nsIContent;
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class nsIDOMHTMLAreaElement;
class nsIDOMHTMLMapElement;
class nsIPresContext;
class nsIRenderingContext;
class nsIURI;
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class nsString;
class nsIDOMEvent;
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class nsImageMap : public nsIDocumentObserver, public nsIDOMFocusListener
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{
public:
nsImageMap();
nsresult Init(nsIPresShell* aPresShell, nsIFrame* aImageFrame, nsIDOMHTMLMapElement* aMap);
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/**
* 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,
* aAltText, aSuppress are filled in with the values from the
* underlying area tag. If the coordinates are not in the map
* then NS_NOT_INSIDE is returned.
*/
PRBool IsInside(nscoord aX, nscoord aY,
nsIContent** aContent,
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nsString& aAbsURL,
nsString& aTarget,
nsString& aAltText,
PRBool* aSuppress);
/**
* 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);
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);
#ifdef DEBUG
void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
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// nsISupports
NS_DECL_ISUPPORTS
// nsIDocumentObserver
NS_IMETHOD BeginUpdate(nsIDocument *aDocument);
NS_IMETHOD EndUpdate(nsIDocument *aDocument);
NS_IMETHOD BeginLoad(nsIDocument *aDocument);
NS_IMETHOD EndLoad(nsIDocument *aDocument);
NS_IMETHOD BeginReflow(nsIDocument *aDocument, nsIPresShell* aShell);
NS_IMETHOD EndReflow(nsIDocument *aDocument, nsIPresShell* aShell);
NS_IMETHOD ContentChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsISupports* aSubContent);
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NS_IMETHOD ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2);
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NS_IMETHOD AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
PRInt32 aHint);
NS_IMETHOD ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer);
NS_IMETHOD ContentInserted(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer);
NS_IMETHOD ContentReplaced(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer);
NS_IMETHOD ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer);
NS_IMETHOD StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet);
NS_IMETHOD StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet);
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NS_IMETHOD StyleSheetDisabledStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDisabled);
NS_IMETHOD StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint);
NS_IMETHOD StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
NS_IMETHOD StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
NS_IMETHOD DocumentWillBeDestroyed(nsIDocument *aDocument);
//nsIDOMFocusListener
virtual nsresult Focus(nsIDOMEvent* aEvent);
virtual nsresult Blur(nsIDOMEvent* aEvent);
virtual nsresult HandleEvent(nsIDOMEvent* aEvent);
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protected:
virtual ~nsImageMap();
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void FreeAreas();
nsresult UpdateAreas();
nsresult UpdateAreasForBlock(nsIContent* aParent);
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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);
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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
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nsIDOMHTMLMapElement* mDomMap;
nsIContent* mMap;
nsVoidArray mAreas;
PRBool mContainsBlockContents;
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};
#endif /* nsImageMap_h___ */