widget/src/photon/nsScreenManagerPh.cpp

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  37
  38 #include "nsScreenManagerPh.h"
  39 #include "nsScreenPh.h"
  40
  41 #include "nsPhGfxLog.h"
  42
  43 nsScreenManagerPh :: nsScreenManagerPh( ) {
  44   // nothing else to do. I guess we could cache a bunch of information
  45   // here, but we want to ask the device at runtime in case anything
  46   // has changed.
  47         }
  48
  49
  50 nsScreenManagerPh :: ~nsScreenManagerPh( ) {
  51         }
  52
  53
  54 // addref, release, QI
  55 NS_IMPL_ISUPPORTS1(nsScreenManagerPh, nsIScreenManager)
  56
  57
  58 //
  59 // CreateNewScreenObject
  60 //
  61 // Utility routine. Creates a new screen object from the given device handle
  62 //
  63 // NOTE: For this "single-monitor" impl, we just always return the cached primary
  64 //        screen. This should change when a multi-monitor impl is done.
  65 //
  66 nsIScreen* nsScreenManagerPh :: CreateNewScreenObject( ) {
  67   nsIScreen* retval = nsnull;
  68   if( !mCachedMainScreen ) mCachedMainScreen = new nsScreenPh( );
  69   NS_IF_ADDREF(retval = mCachedMainScreen.get());
  70   return retval;
  71         }
  72
  73 //
  74 // ScreenForRect
  75 //
  76 // Returns the screen that contains the rectangle. If the rect overlaps
  77 // multiple screens, it picks the screen with the greatest area of intersection.
  78 //
  79 // The coordinates are in pixels (not twips) and in screen coordinates.
  80 //
  81 NS_IMETHODIMP nsScreenManagerPh :: ScreenForRect ( PRInt32 /*inLeft*/, PRInt32 /*inTop*/, PRInt32 /*inWidth*/, PRInt32 /*inHeight*/, nsIScreen **outScreen ) {
  82   GetPrimaryScreen( outScreen );
  83   return NS_OK;
  84         }
  85
  86 //
  87 // GetPrimaryScreen
  88 //
  89 // The screen with the menubar/taskbar. This shouldn't be needed very
  90 // often.
  91 //
  92 NS_IMETHODIMP nsScreenManagerPh :: GetPrimaryScreen( nsIScreen * *aPrimaryScreen ) {
  93   *aPrimaryScreen = CreateNewScreenObject();    // addrefs
  94   return NS_OK;
  95         }
  96
  97 //
  98 // GetNumberOfScreens
  99 //
 100 // Returns how many physical screens are available.
 101 //
 102 NS_IMETHODIMP nsScreenManagerPh :: GetNumberOfScreens( PRUint32 *aNumberOfScreens ) {
 103   *aNumberOfScreens = 1;
 104   return NS_OK;
 105         }
 106