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nsDeviceContextWin.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
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
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00022  * Contributor(s):
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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 nsDeviceContextWin_h___
00039 #define nsDeviceContextWin_h___
00040 
00041 #include "nsDeviceContext.h"
00042 #include "nsIScreenManager.h"
00043 #include <windows.h>
00044 
00045 class nsIScreen;
00046 
00047 
00048 class nsDeviceContextWin : public DeviceContextImpl
00049 {
00050 public:
00051   nsDeviceContextWin();
00052 
00053   NS_IMETHOD  Init(nsNativeWidget aWidget);
00054 
00055   NS_IMETHOD  CreateRenderingContext(nsIRenderingContext *&aContext);
00056 
00057   NS_IMETHOD  SupportsNativeWidgets(PRBool &aSupportsWidgets);
00058 
00059   NS_IMETHOD  GetCanonicalPixelScale(float &aScale) const;
00060   NS_IMETHOD  SetCanonicalPixelScale(float aScale);
00061 
00062   NS_IMETHOD  GetScrollBarDimensions(float &aWidth, float &aHeight) const;
00063   NS_IMETHOD  GetSystemFont(nsSystemFontID anID, nsFont *aFont) const;
00064 
00065   //get a low level drawing surface for rendering. the rendering context
00066   //that is passed in is used to create the drawing surface if there isn't
00067   //already one in the device context. the drawing surface is then cached
00068   //in the device context for re-use.
00069   NS_IMETHOD  GetDrawingSurface(nsIRenderingContext &aContext, nsIDrawingSurface* &aSurface);
00070 
00071   NS_IMETHOD  CheckFontExistence(const nsString& aFontName);
00072 
00073   NS_IMETHOD  GetDepth(PRUint32& aDepth);
00074 
00075   NS_IMETHOD  GetPaletteInfo(nsPaletteInfo&);
00076 
00077   NS_IMETHOD GetDeviceSurfaceDimensions(PRInt32 &aWidth, PRInt32 &aHeight);
00078   NS_IMETHOD GetRect(nsRect &aRect);
00079   NS_IMETHOD GetClientRect(nsRect &aRect);
00080 
00081   NS_IMETHOD GetDeviceContextFor(nsIDeviceContextSpec *aDevice,
00082                                  nsIDeviceContext *&aContext);
00083 
00084   NS_IMETHOD BeginDocument(PRUnichar * aTitle, PRUnichar* aPrintToFileName, PRInt32 aStartPage, PRInt32 aEndPage);
00085   NS_IMETHOD EndDocument(void);
00086   NS_IMETHOD AbortDocument(void);
00087 
00088   NS_IMETHOD BeginPage(void);
00089   NS_IMETHOD EndPage(void);
00090 
00091   // Static Helper Methods
00092   static char* GetACPString(const nsAString& aStr);
00093 
00094 friend class nsNativeThemeWin;
00095 
00096 protected:
00097   virtual ~nsDeviceContextWin();
00098   void CommonInit(HDC aDC);
00099   nsresult Init(nsNativeDeviceContext aContext, nsIDeviceContext *aOrigContext);
00100   void FindScreen ( nsIScreen** outScreen ) ;
00101   void ComputeClientRectUsingScreen ( nsRect* outRect ) ;
00102   void ComputeFullAreaUsingScreen ( nsRect* outRect ) ;
00103   nsresult GetSysFontInfo(HDC aHDC, nsSystemFontID anID, nsFont* aFont) const;
00104 
00105   nsresult CopyLogFontToNSFont(HDC* aHDC, const LOGFONT* ptrLogFont, nsFont* aFont,
00106                                PRBool aIsWide = PR_FALSE) const;
00107   
00108   PRBool mCachedClientRect;
00109   PRBool mCachedFullRect;
00110 
00111   nsIDrawingSurface*      mSurface;
00112   PRUint32              mDepth;  // bit depth of device
00113   nsPaletteInfo         mPaletteInfo;
00114   float                 mPixelScale;
00115   PRInt32               mWidth;
00116   PRInt32               mHeight;
00117   nsRect                mClientRect;
00118   nsIDeviceContextSpec  *mSpec;
00119 
00120   nsCOMPtr<nsIScreenManager> mScreenManager;    // cache the screen service
00121 
00122 public:
00123   HDC                   mDC;
00124 };
00125 
00126 #endif /* nsDeviceContextWin_h___ */