Single-monitor impl of screen manager/object for win32 just to get something in place. DevContext

now uses it, but will also have to be tweaked when the multi-monitor impl is implemented. Just
pushing code around for now, nothing major. r=danm.

widget/src/windows/nsScreenManagerWin.cpp

@@ -50,9 +50,9 @@ NS_IMPL_ISUPPORTS(nsScreenManagerWin, NS_GET_IID(nsIScreenManager))
 // Utility routine. Creates a new screen object from the given device handle
 //
 nsIScreen* 
-nsScreenManagerWin :: CreateNewScreenObject (  )
+nsScreenManagerWin :: CreateNewScreenObject ( HDC inScreen )
 {
-  nsIScreen* retval = new nsScreenWin ( );
+  nsIScreen* retval = new nsScreenWin ( inScreen );
   NS_IF_ADDREF(retval);
   return retval;
 }
@@ -70,34 +70,23 @@ NS_IMETHODIMP
 nsScreenManagerWin :: ScreenForRect ( PRInt32 inTop, PRInt32 inLeft, PRInt32 inWidth, PRInt32 inHeight,
                                         nsIScreen **outScreen )
 {
-#if 0
-  if ( !(inTop || inLeft || inWidth || inHeight) ) {
-    NS_WARNING ( "trying to find screen for sizeless window" );
-    *outScreen = CreateNewScreenObject ( ::GetMainDevice() );    // addrefs
+  if ( !(inWidth || inHeight) ) {
+    NS_WARNING ( "trying to find screen for sizeless window, using primary monitor" );
+    *outScreen = CreateNewScreenObject ( ::GetDC(nsnull) );    // addrefs
     return NS_OK;
   }
 
-  Rect globalWindowBounds = { inTop, inLeft, inTop + inHeight, inLeft + inWidth };
-
-  GDHandle currDevice = ::GetDeviceList();
-  GDHandle deviceWindowIsOn = ::GetMainDevice();
-  PRInt32 greatestArea = 0;
-  while ( currDevice ) {
-    if ( ::TestDeviceAttribute(currDevice, screenDevice) && ::TestDeviceAttribute(currDevice, screenActive) ) {
-      // calc the intersection.
-      Rect intersection;
-      Rect devRect = (**currDevice).gdRect;
-      ::SectRect ( &globalWindowBounds, &devRect, &intersection );
-      PRInt32 intersectArea = (intersection.right - intersection.left) * 
-                                  (intersection.bottom - intersection.top);
-      if ( intersectArea > greatestArea ) {
-        greatestArea = intersectArea;
-        deviceWindowIsOn = currDevice;
-     }      
-    } // if device is a screen and visible
-    currDevice = ::GetNextDevice(currDevice);
-  } // foreach device in list
+  RECT globalWindowBounds = { inLeft, inTop, inLeft + inWidth, inTop + inHeight };
 
+  // we want to use ::MonitorFromRect() but it doesn't exist under 95/NT. For now, just 
+  // always return the primary monitor.
+  
+  *outScreen = CreateNewScreenObject ( ::GetDC(nsnull) );    // addrefs
+  
+#if 0
+  HMONITOR screen = ::MonitorFromRect ( &globalWindowBounds, MONITOR_DEFAULTTOPRIMARY );
+  
+  
   *outScreen = CreateNewScreenObject ( deviceWindowIsOn );    // addrefs
 #endif
   return NS_OK;
@@ -112,9 +101,9 @@ nsScreenManagerWin :: ScreenForRect ( PRInt32 inTop, PRInt32 inLeft, PRInt32 inW
 // often.
 //
 NS_IMETHODIMP 
-nsScreenManagerWin :: GetPrimaryScreen(nsIScreen * *aPrimaryScreen) 
+nsScreenManagerWin :: GetPrimaryScreen(nsIScreen** aPrimaryScreen) 
 {
-//  *aPrimaryScreen = CreateNewScreenObject ( ::GetMainDevice() );    // addrefs  
+  *aPrimaryScreen = CreateNewScreenObject ( ::GetDC(nsnull) );    // addrefs  
   return NS_OK;
   
 } // GetPrimaryScreen

widget/src/windows/nsScreenManagerWin.h

@@ -24,6 +24,7 @@
 #define nsScreenManagerWin_h___
 
 #include "nsIScreenManager.h"
+#include <windows.h>
 
 class nsIScreen;
 
@@ -40,7 +41,7 @@ public:
 
 private:
 
-  nsIScreen* CreateNewScreenObject ( ) ;
+  nsIScreen* CreateNewScreenObject ( HDC inScreen ) ;
 
 };
 

widget/src/windows/nsScreenWin.cpp

@@ -23,12 +23,13 @@
 #include "nsScreenWin.h"
 
 
-nsScreenWin :: nsScreenWin (  )
-//  : mScreen(inScreen)
+nsScreenWin :: nsScreenWin ( HDC inScreen )
+  : mScreen(inScreen)
 {
   NS_INIT_REFCNT();
 
-  //NS_ASSERTION ( inScreen, "Passing null device to nsScreenWin" );
+  NS_ASSERTION ( inScreen, "Passing null device to nsScreenWin" );
+  NS_ASSERTION ( ::GetDeviceCaps(inScreen, TECHNOLOGY) == DT_RASDISPLAY, "Not a display screen");
   
   // nothing else to do. I guess we could cache a bunch of information
   // here, but we want to ask the device at runtime in case anything
@@ -49,7 +50,7 @@ NS_IMPL_ISUPPORTS(nsScreenWin, NS_GET_IID(nsIScreen))
 NS_IMETHODIMP 
 nsScreenWin :: GetWidth(PRInt32 *aWidth)
 {
-  //*aWidth = (**mScreen).gdRect.right - (**mScreen).gdRect.left;
+  *aWidth = ::GetDeviceCaps(mScreen, HORZRES);
   return NS_OK;
 
 } // GetWidth
@@ -58,7 +59,7 @@ nsScreenWin :: GetWidth(PRInt32 *aWidth)
 NS_IMETHODIMP 
 nsScreenWin :: GetHeight(PRInt32 *aHeight)
 {
-  //*aHeight = (**mScreen).gdRect.bottom - (**mScreen).gdRect.top;
+  *aHeight = ::GetDeviceCaps(mScreen, VERTRES);
   return NS_OK;
 
 } // GetHeight
@@ -67,7 +68,7 @@ nsScreenWin :: GetHeight(PRInt32 *aHeight)
 NS_IMETHODIMP 
 nsScreenWin :: GetPixelDepth(PRInt32 *aPixelDepth)
 {
-  //*aPixelDepth = (**(**mScreen).gdPMap).pixelSize;
+  *aPixelDepth = ::GetDeviceCaps(mScreen, BITSPIXEL);
   return NS_OK;
 
 } // GetPixelDepth
@@ -76,8 +77,7 @@ nsScreenWin :: GetPixelDepth(PRInt32 *aPixelDepth)
 NS_IMETHODIMP 
 nsScreenWin :: GetColorDepth(PRInt32 *aColorDepth)
 {
-  //*aColorDepth = (**(**mScreen).gdPMap).pixelSize;
-  return NS_OK;
+  return GetPixelDepth(aColorDepth);
 
 } // GetColorDepth
 
@@ -85,7 +85,10 @@ nsScreenWin :: GetColorDepth(PRInt32 *aColorDepth)
 NS_IMETHODIMP 
 nsScreenWin :: GetAvailWidth(PRInt32 *aAvailWidth)
 {
-  GetWidth(aAvailWidth);
+  // XXX Needs to be rewritten for a non-primary monitor?
+  RECT workArea;
+  ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
+  *aAvailWidth = workArea.right - workArea.left;
   return NS_OK;
 
 } // GetAvailWidth
@@ -94,10 +97,9 @@ nsScreenWin :: GetAvailWidth(PRInt32 *aAvailWidth)
 NS_IMETHODIMP 
 nsScreenWin :: GetAvailHeight(PRInt32 *aAvailHeight)
 {
-  //Rect adjustedRect;
-  //SubtractMenuBar ( (**mScreen).gdRect, &adjustedRect );
-  //*aAvailHeight = adjustedRect.bottom - adjustedRect.top;
-  
+  RECT workArea;
+  ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
+  *aAvailHeight = workArea.bottom - workArea.top;
   return NS_OK;
 
 } // GetAvailHeight
@@ -106,7 +108,9 @@ nsScreenWin :: GetAvailHeight(PRInt32 *aAvailHeight)
 NS_IMETHODIMP 
 nsScreenWin :: GetAvailLeft(PRInt32 *aAvailLeft)
 {
-  //*aAvailLeft = (**mScreen).gdRect.left;
+  RECT workArea;
+  ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
+  *aAvailLeft = workArea.left;
   return NS_OK;
 
 } // GetAvailLeft
@@ -115,9 +119,9 @@ nsScreenWin :: GetAvailLeft(PRInt32 *aAvailLeft)
 NS_IMETHODIMP 
 nsScreenWin :: GetAvailTop(PRInt32 *aAvailTop)
 {
-  //Rect adjustedRect;
-  //SubtractMenuBar ( (**mScreen).gdRect, &adjustedRect );
-  //*aAvailTop = adjustedRect.top;
+  RECT workArea;
+  ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
+  *aAvailTop = workArea.top;
   
   return NS_OK;
 

widget/src/windows/nsScreenWin.h

@@ -23,6 +23,7 @@
 #ifndef nsScreenWin_h___
 #define nsScreenWin_h___
 
+#include <windows.h>
 #include "nsIScreen.h"
 
 //------------------------------------------------------------------------
@@ -30,8 +31,7 @@
 class nsScreenWin : public nsIScreen
 {
 public:
-  //nsScreenWin ( GDHandle inScreen );
-  nsScreenWin ( );
+  nsScreenWin ( HDC inScreen );
   ~nsScreenWin();
 
   NS_DECL_ISUPPORTS
@@ -43,7 +43,7 @@ private:
     // asked.
   //PRBool IsPrimaryScreen ( ) const { return (mScreen == ::GetMainDevice()); }
   
-  // GDHandle mScreen;   // the device that represents this screen
+  HDC mScreen;   // the dc that represents this screen
 };
 
 #endif  // nsScreenWin_h___