dom/base/nsScreen.cpp

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  22  * Contributor(s):
  23  *   Travis Bogard <travis@netscape.com>
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  38
  39 #include "nscore.h"
  40 #include "nsScreen.h"
  41 #include "nsIDocShell.h"
  42 #include "nsIDeviceContext.h"
  43 #include "nsPresContext.h"
  44 #include "nsCOMPtr.h"
  45 #include "nsDOMClassInfo.h"
  46 #include "nsIInterfaceRequestorUtils.h"
  47 #include "nsLayoutUtils.h"
  48
  49 //
  50 //  Screen class implementation
  51 //
  52 nsScreen::nsScreen(nsIDocShell* aDocShell)
  53   : mDocShell(aDocShell)
  54 {
  55 }
  56
  57 nsScreen::~nsScreen()
  58 {
  59 }
  60
  61
  62 DOMCI_DATA(Screen, nsScreen)
  63
  64 // QueryInterface implementation for nsScreen
  65 NS_INTERFACE_MAP_BEGIN(nsScreen)
  66   NS_INTERFACE_MAP_ENTRY(nsISupports)
  67   NS_INTERFACE_MAP_ENTRY(nsIDOMScreen)
  68   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(Screen)
  69 NS_INTERFACE_MAP_END
  70
  71
  72 NS_IMPL_ADDREF(nsScreen)
  73 NS_IMPL_RELEASE(nsScreen)
  74
  75
  76 NS_IMETHODIMP
  77 nsScreen::SetDocShell(nsIDocShell* aDocShell)
  78 {
  79    mDocShell = aDocShell; // Weak Reference
  80    return NS_OK;
  81 }
  82
  83 NS_IMETHODIMP
  84 nsScreen::GetTop(PRInt32* aTop)
  85 {
  86   nsRect rect;
  87   nsresult rv = GetRect(rect);
  88
  89   *aTop = rect.y;
  90
  91   return rv;
  92 }
  93
  94
  95 NS_IMETHODIMP
  96 nsScreen::GetLeft(PRInt32* aLeft)
  97 {
  98   nsRect rect;
  99   nsresult rv = GetRect(rect);
 100
 101   *aLeft = rect.x;
 102
 103   return rv;
 104 }
 105
 106
 107 NS_IMETHODIMP
 108 nsScreen::GetWidth(PRInt32* aWidth)
 109 {
 110   nsRect rect;
 111   nsresult rv = GetRect(rect);
 112
 113   *aWidth = rect.width;
 114
 115   return rv;
 116 }
 117
 118 NS_IMETHODIMP
 119 nsScreen::GetHeight(PRInt32* aHeight)
 120 {
 121   nsRect rect;
 122   nsresult rv = GetRect(rect);
 123
 124   *aHeight = rect.height;
 125
 126   return rv;
 127 }
 128
 129 NS_IMETHODIMP
 130 nsScreen::GetPixelDepth(PRInt32* aPixelDepth)
 131 {
 132   nsIDeviceContext* context = GetDeviceContext();
 133
 134   if (!context) {
 135     *aPixelDepth = -1;
 136
 137     return NS_ERROR_FAILURE;
 138   }
 139
 140   PRUint32 depth;
 141   context->GetDepth(depth);
 142
 143   *aPixelDepth = depth;
 144
 145   return NS_OK;
 146 }
 147
 148 NS_IMETHODIMP
 149 nsScreen::GetColorDepth(PRInt32* aColorDepth)
 150 {
 151   return GetPixelDepth(aColorDepth);
 152 }
 153
 154 NS_IMETHODIMP
 155 nsScreen::GetAvailWidth(PRInt32* aAvailWidth)
 156 {
 157   nsRect rect;
 158   nsresult rv = GetAvailRect(rect);
 159
 160   *aAvailWidth = rect.width;
 161
 162   return rv;
 163 }
 164
 165 NS_IMETHODIMP
 166 nsScreen::GetAvailHeight(PRInt32* aAvailHeight)
 167 {
 168   nsRect rect;
 169   nsresult rv = GetAvailRect(rect);
 170
 171   *aAvailHeight = rect.height;
 172
 173   return rv;
 174 }
 175
 176 NS_IMETHODIMP
 177 nsScreen::GetAvailLeft(PRInt32* aAvailLeft)
 178 {
 179   nsRect rect;
 180   nsresult rv = GetAvailRect(rect);
 181
 182   *aAvailLeft = rect.x;
 183
 184   return rv;
 185 }
 186
 187 NS_IMETHODIMP
 188 nsScreen::GetAvailTop(PRInt32* aAvailTop)
 189 {
 190   nsRect rect;
 191   nsresult rv = GetAvailRect(rect);
 192
 193   *aAvailTop = rect.y;
 194
 195   return rv;
 196 }
 197
 198 nsIDeviceContext*
 199 nsScreen::GetDeviceContext()
 200 {
 201   return nsLayoutUtils::GetDeviceContextForScreenInfo(mDocShell);
 202 }
 203
 204 nsresult
 205 nsScreen::GetRect(nsRect& aRect)
 206 {
 207   nsIDeviceContext *context = GetDeviceContext();
 208
 209   if (!context) {
 210     return NS_ERROR_FAILURE;
 211   }
 212
 213   context->GetRect(aRect);
 214
 215   aRect.x = nsPresContext::AppUnitsToIntCSSPixels(aRect.x);
 216   aRect.y = nsPresContext::AppUnitsToIntCSSPixels(aRect.y);
 217   aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
 218   aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
 219
 220   return NS_OK;
 221 }
 222
 223 nsresult
 224 nsScreen::GetAvailRect(nsRect& aRect)
 225 {
 226   nsIDeviceContext *context = GetDeviceContext();
 227
 228   if (!context) {
 229     return NS_ERROR_FAILURE;
 230   }
 231
 232   context->GetClientRect(aRect);
 233
 234   aRect.x = nsPresContext::AppUnitsToIntCSSPixels(aRect.x);
 235   aRect.y = nsPresContext::AppUnitsToIntCSSPixels(aRect.y);
 236   aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
 237   aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
 238
 239   return NS_OK;
 240 }