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nsATSUIUtils.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00015  * The Original Code is mozilla.org code.
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00017  * The Initial Developer of the Original Code is
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00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 #ifndef nsATSUIUtils_h___
00039 #define nsATSUIUtils_h___
00040 
00041 
00042 #include "nsCRT.h"
00043 #include "nsError.h"
00044 #include "nsCoord.h"
00045 #include "nsColor.h"
00046 #include "nsIRenderingContext.h"
00047 #include <ATSUnicode.h>
00048 
00049 class ATSUILayoutCache;
00050 class nsDrawingSurfaceMac;
00051 class nsIDeviceContext;
00052 
00053 
00054 class nsATSUIUtils
00055 {
00056 public:
00057   static void Initialize();
00058   static PRBool IsAvailable();
00059 
00060   static ATSUILayoutCache*  gTxLayoutCache;
00061 
00062 private:
00063   static PRBool gIsAvailable;
00064   static PRBool gInitialized;
00065 };
00066 
00067 
00068 
00069 class nsATSUIToolkit
00070 {
00071 public:
00072   nsATSUIToolkit();
00073   ~nsATSUIToolkit() {};
00074 
00075   void PrepareToDraw(CGrafPtr aPort, nsIDeviceContext* aContext);
00076  
00077   nsresult GetTextDimensions(const PRUnichar *aCharPt, PRUint32 aLen, nsTextDimensions &oDim, 
00078                              short aSize, short fontNum, PRBool aBold, 
00079                              PRBool aItalic, nscolor aColor);
00080   nsresult DrawString(const PRUnichar *aCharPt, PRUint32 aLen, PRInt32 x, PRInt32 y, short &oWidth, 
00081                       short aSize, short fontNum, PRBool aBold, PRBool aItalic, 
00082                       nscolor aColor);
00083 #ifdef MOZ_MATHML
00084   nsresult GetBoundingMetrics(const PRUnichar *aCharPt, PRUint32 aLen, nsBoundingMetrics &aBoundingMetrics,
00085                               short aSize, short fontNum, PRBool aBold, 
00086                               PRBool aItalic, nscolor aColor);
00087 #endif // MOZ_MATHML
00088 
00089 private:
00090   void StartDraw(const PRUnichar *aCharPt, PRUint32 aLen, short aSize, short fontNum, PRBool aBold,
00091                  PRBool aItalic, nscolor aColor, ATSUTextLayout& oLayout);
00092 
00093   ATSUTextLayout GetTextLayout(short aFontNum, short aSize, PRBool aBold, 
00094                                PRBool aItalic, nscolor aColor);
00095   
00096 private:
00097   CGrafPtr        mPort;
00098   nsIDeviceContext*  mContext;
00099 };
00100 
00101 #endif //nsATSUIUtils_h___