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nsDeviceContextGTK.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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00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 #ifndef nsDeviceContextGTK_h___
00039 #define nsDeviceContextGTK_h___
00040 
00041 #include "nsDeviceContext.h"
00042 #include "nsUnitConversion.h"
00043 #include "nsIWidget.h"
00044 #include "nsIView.h"
00045 #include "nsIRenderingContext.h"
00046 
00047 #include "nsRenderingContextGTK.h"
00048 #include "nsIScreenManager.h"
00049 
00050 class nsDeviceContextGTK : public DeviceContextImpl
00051 {
00052 public:
00053   nsDeviceContextGTK();
00054   virtual ~nsDeviceContextGTK();
00055 
00056   static void Shutdown(); // to be called from module destructor
00057 
00058   NS_IMETHOD  Init(nsNativeWidget aNativeWidget);
00059 
00060   NS_IMETHOD  CreateRenderingContext(nsIRenderingContext *&aContext);
00061   NS_IMETHOD  CreateRenderingContext(nsIView *aView, nsIRenderingContext *&aContext) {return (DeviceContextImpl::CreateRenderingContext(aView,aContext));}
00062   NS_IMETHOD  CreateRenderingContext(nsIWidget *aWidget, nsIRenderingContext *&aContext) {return (DeviceContextImpl::CreateRenderingContext(aWidget,aContext));}
00063   NS_IMETHOD  CreateRenderingContext(nsIDrawingSurface* aSurface, nsIRenderingContext *&aContext) {return (DeviceContextImpl::CreateRenderingContext(aSurface, aContext));}
00064   NS_IMETHOD  CreateRenderingContextInstance(nsIRenderingContext *&aContext);
00065 
00066   NS_IMETHOD  SupportsNativeWidgets(PRBool &aSupportsWidgets);
00067 
00068   NS_IMETHOD  GetScrollBarDimensions(float &aWidth, float &aHeight) const;
00069   NS_IMETHOD  GetSystemFont(nsSystemFontID anID, nsFont *aFont) const;
00070 
00071   NS_IMETHOD CheckFontExistence(const nsString& aFontName);
00072 
00073   NS_IMETHOD GetDeviceSurfaceDimensions(PRInt32 &aWidth, PRInt32 &aHeight);
00074   NS_IMETHOD GetClientRect(nsRect &aRect);
00075   NS_IMETHOD GetRect(nsRect &aRect);
00076 
00077   NS_IMETHOD GetDeviceContextFor(nsIDeviceContextSpec *aDevice,
00078                                  nsIDeviceContext *&aContext);
00079 
00080   NS_IMETHOD BeginDocument(PRUnichar * aTitle, PRUnichar* aPrintToFileName, PRInt32 aStartPage, PRInt32 aEndPage);
00081   NS_IMETHOD EndDocument(void);
00082   NS_IMETHOD AbortDocument(void);
00083 
00084   NS_IMETHOD BeginPage(void);
00085   NS_IMETHOD EndPage(void);
00086 
00087   NS_IMETHOD GetDepth(PRUint32& aDepth);
00088 
00089   static int prefChanged(const char *aPref, void *aClosure);
00090   static void ClearCachedSystemFonts();
00091 
00092 protected:
00093   nsresult   SetDPI(PRInt32 aPrefDPI);
00094   
00095 private:
00096   PRUint32      mDepth;
00097   PRBool        mWriteable;
00098   PRUint32      mNumCells;
00099   PRInt16       mScrollbarHeight;
00100   PRInt16       mScrollbarWidth;
00101   static nscoord mDpi;
00102 
00103   float         mWidthFloat;
00104   float         mHeightFloat;
00105   PRInt32       mWidth;
00106   PRInt32       mHeight;
00107   GdkWindow    *mDeviceWindow;
00108 
00109   nsCOMPtr<nsIScreenManager> mScreenManager;
00110 
00111   nsresult GetSystemFontInfo(GdkFont* iFont, nsSystemFontID anID, nsFont* aFont) const;
00112 };
00113 
00114 // used by several files
00115 
00116 #define NS_TO_GDK_RGB(ns) \
00117   ((ns & 0xff) << 16 | (ns & 0xff00) | ((ns >> 16) & 0xff))
00118 #define GDK_COLOR_TO_NS_RGB(c) \
00119   ((nscolor) NS_RGB(c.red, c.green, c.blue))
00120 
00121 
00122 #endif /* nsDeviceContextGTK_h___ */
00123