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nsImageMap.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
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00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
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00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
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00036  * ***** END LICENSE BLOCK ***** */
00037 #ifndef nsImageMap_h___
00038 #define nsImageMap_h___
00039 
00040 #include "nsISupports.h"
00041 #include "nsCoord.h"
00042 #include "nsVoidArray.h"
00043 #include "nsStubDocumentObserver.h"
00044 #include "nsIDOMFocusListener.h"
00045 #include "nsIFrame.h"
00046 #include "nsIImageMap.h"
00047 
00048 class nsIDOMHTMLAreaElement;
00049 class nsIDOMHTMLMapElement;
00050 class nsPresContext;
00051 class nsIRenderingContext;
00052 class nsIURI;
00053 class nsString;
00054 class nsIDOMEvent;
00055 
00056 class nsImageMap : public nsStubDocumentObserver, public nsIDOMFocusListener,
00057                    public nsIImageMap
00058 {
00059 public:
00060   nsImageMap();
00061 
00062   nsresult Init(nsIPresShell* aPresShell, nsIFrame* aImageFrame, nsIDOMHTMLMapElement* aMap);
00063 
00070   PRBool IsInside(nscoord aX, nscoord aY,
00071                   nsIContent** aContent) const;
00072 
00073   void Draw(nsPresContext* aCX, nsIRenderingContext& aRC);
00074   
00079   void Destroy(void);
00080   
00081   // nsISupports
00082   NS_DECL_ISUPPORTS
00083 
00084   // nsIDocumentObserver
00085   virtual void AttributeChanged(nsIDocument* aDocument, nsIContent* aContent,
00086                                 PRInt32 aNameSpaceID, nsIAtom* aAttribute,
00087                                 PRInt32 aModType);
00088   virtual void ContentAppended(nsIDocument* aDocument, nsIContent* aContainer,
00089                                PRInt32 aNewIndexInContainer);
00090   virtual void ContentInserted(nsIDocument* aDocument, nsIContent* aContainer,
00091                                nsIContent* aChild, PRInt32 aIndexInContainer);
00092   virtual void ContentRemoved(nsIDocument* aDocument, nsIContent* aContainer,
00093                               nsIContent* aChild, PRInt32 aIndexInContainer);
00094 
00095   //nsIDOMFocusListener
00096   NS_IMETHOD Focus(nsIDOMEvent* aEvent);
00097   NS_IMETHOD Blur(nsIDOMEvent* aEvent);
00098   NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);
00099 
00100   //nsIImageMap
00101   NS_IMETHOD GetBoundsForAreaContent(nsIContent *aContent, 
00102                                      nsPresContext* aPresContext, 
00103                                      nsRect& aBounds);
00104 
00105 protected:
00106   virtual ~nsImageMap();
00107 
00108   void FreeAreas();
00109 
00110   nsresult UpdateAreas();
00111   nsresult UpdateAreasForBlock(nsIContent* aParent, PRBool* aFoundAnchor);
00112 
00113   nsresult AddArea(nsIContent* aArea);
00114  
00115   nsresult ChangeFocus(nsIDOMEvent* aEvent, PRBool aFocus);
00116 
00117   void MaybeUpdateAreas(nsIContent *aContent);
00118 
00119   nsIPresShell* mPresShell; // WEAK - owns the frame that owns us
00120   nsIFrame* mImageFrame;  // the frame that owns us
00121   nsIDocument* mDocument; // WEAK - the imagemap will not outlive the document
00122   nsCOMPtr<nsIContent> mMap;
00123   nsAutoVoidArray mAreas; // almost always has some entries
00124   PRBool mContainsBlockContents;
00125 };
00126 
00127 #endif /* nsImageMap_h___ */