gecko/widget/src/cocoa/nsCocoaUtils.mm

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#include "nsCocoaUtils.h"

// Returns the height (from lowest 'y' to highest 'y', regardless of sign) of
// the global coordinate system that includes all NSScreen objects.
float CocoaScreenCoordsHeight()
{
  float globalLowestY = 0;
  float globalHighestY = 0;
  NSArray *allScreens = [NSScreen screens];
  for (unsigned i = 0; i < [allScreens count]; ++i) {
    NSScreen *aScreen = (NSScreen*) [allScreens objectAtIndex:i];
    NSRect screenFrame = [aScreen frame];
    float screenLowestY = screenFrame.origin.y;
    float screenHighestY = screenFrame.origin.y + screenFrame.size.height;
    if (screenLowestY < globalLowestY)
      globalLowestY = screenLowestY;
    if (screenHighestY > globalHighestY)
      globalHighestY = screenHighestY;
  }
  return globalHighestY - globalLowestY;
}


NSRect geckoRectToCocoaRect(const nsRect &geckoRect)
{
  // We only need to change the Y coordinate by starting with the screen
  // height, subtracting the gecko Y coordinate, and subtracting the height.
  return NSMakeRect(geckoRect.x,
                    CocoaScreenCoordsHeight() - geckoRect.y - geckoRect.height,
                    geckoRect.width,
                    geckoRect.height);
}


nsRect cocoaRectToGeckoRect(const NSRect &cocoaRect)
{
  // We only need to change the Y coordinate by starting with the screen
  // height and subtracting both the cocoa y origin and the height of the
  // cocoa rect.
  return nsRect((nscoord)cocoaRect.origin.x,
                (nscoord)(CocoaScreenCoordsHeight() - (cocoaRect.origin.y + cocoaRect.size.height)),
                (nscoord)cocoaRect.size.width,
                (nscoord)cocoaRect.size.height);
}