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nsTextAccessibleWrap.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: NPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public
00006  * License Version 1.1 (the "License"); you may not use this file
00007  * except in compliance with the License. You may obtain a copy of
00008  * the License at http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS
00011  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
00012  * implied. See the License for the specific language governing
00013  * rights and limitations under the License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is Netscape Corp.
00018  * Portions created by Netscape Corp.are Copyright (C) 2003 Netscape
00019  * Corp. All Rights Reserved.
00020  *
00021  * Original Author: Aaron Leventhal
00022  *
00023  * Contributor(s):
00024  *
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either the GNU General Public License Version 2 or later (the "GPL"), or
00028  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00029  * in which case the provisions of the GPL or the LGPL are applicable instead
00030  * of those above. If you wish to allow use of your version of this file only
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00035  * the provisions above, a recipient may use your version of this file under
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00037  *
00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 #ifndef _nsTextAccessibleWrap_H_
00041 #define _nsTextAccessibleWrap_H_
00042 
00043 #include "nsTextAccessible.h"
00044 #include "ISimpleDOMText.h"
00045 #include "nsRect.h"
00046 
00047 class nsIFrame;
00048 class nsPresContext;
00049 class nsIRenderingContext;
00050 
00051 class nsTextAccessibleWrap : public nsTextAccessible, 
00052                              public ISimpleDOMText
00053 {
00054   public:
00055     nsTextAccessibleWrap(nsIDOMNode *, nsIWeakReference* aShell);
00056     virtual ~nsTextAccessibleWrap() {}
00057 
00058     // IUnknown methods - see iunknown.h for documentation
00059     STDMETHODIMP_(ULONG) AddRef();
00060     STDMETHODIMP_(ULONG) Release();
00061     STDMETHODIMP QueryInterface(REFIID, void**);
00062 
00063     virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_domText( 
00064         /* [retval][out] */ BSTR __RPC_FAR *domText);
00065     
00066     virtual HRESULT STDMETHODCALLTYPE get_clippedSubstringBounds( 
00067         /* [in] */ unsigned int startIndex,
00068         /* [in] */ unsigned int endIndex,
00069         /* [out] */ int __RPC_FAR *x,
00070         /* [out] */ int __RPC_FAR *y,
00071         /* [out] */ int __RPC_FAR *width,
00072         /* [out] */ int __RPC_FAR *height);
00073     
00074     virtual HRESULT STDMETHODCALLTYPE get_unclippedSubstringBounds( 
00075         /* [in] */ unsigned int startIndex,
00076         /* [in] */ unsigned int endIndex,
00077         /* [out] */ int __RPC_FAR *x,
00078         /* [out] */ int __RPC_FAR *y,
00079         /* [out] */ int __RPC_FAR *width,
00080         /* [out] */ int __RPC_FAR *height);
00081     
00082     virtual HRESULT STDMETHODCALLTYPE scrollToSubstring( 
00083         /* [in] */ unsigned int startIndex,
00084         /* [in] */ unsigned int endIndex);
00085 
00086     virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_fontFamily( 
00087         /* [retval][out] */ BSTR __RPC_FAR *fontFamily);
00088     
00089   protected:
00090     nsresult GetCharacterExtents(PRInt32 aStartOffset, PRInt32 aEndOffset,
00091                                  PRInt32* aX, PRInt32* aY, 
00092                                  PRInt32* aWidth, PRInt32* aHeight);
00093 
00094     // Return child frame containing offset on success
00095     nsIFrame* GetPointFromOffset(nsIFrame *aContainingFrame, nsPresContext *aPresContext,
00096                                  nsIRenderingContext *aRenderingContext,
00097                                  PRInt32 aOffset, PRBool aPreferNext, nsPoint& aOutPoint);
00098 };
00099 
00100 #endif
00101