gfx/src/nsSize.h

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  37
  38 #ifndef NSSIZE_H
  39 #define NSSIZE_H
  40
  41 #include "nsCoord.h"
  42
  43 // Maximum allowable size
  44 #define NS_MAXSIZE nscoord_MAX
  45
  46 struct nsSize {
  47   nscoord width, height;
  48
  49   // Constructors
  50   nsSize() {}
  51   nsSize(const nsSize& aSize) {width = aSize.width; height = aSize.height;}
  52   nsSize(nscoord aWidth, nscoord aHeight) {width = aWidth; height = aHeight;}
  53
  54   void SizeTo(nscoord aWidth, nscoord aHeight) {width = aWidth; height = aHeight;}
  55   void SizeBy(nscoord aDeltaWidth, nscoord aDeltaHeight) {width += aDeltaWidth;
  56                                                           height += aDeltaHeight;}
  57
  58   // Overloaded operators. Note that '=' isn't defined so we'll get the
  59   // compiler generated default assignment operator
  60   PRBool  operator==(const nsSize& aSize) const {
  61     return (PRBool) ((width == aSize.width) && (height == aSize.height));
  62   }
  63   PRBool  operator!=(const nsSize& aSize) const {
  64     return (PRBool) ((width != aSize.width) || (height != aSize.height));
  65   }
  66   nsSize operator+(const nsSize& aSize) const {
  67     return nsSize(width + aSize.width, height + aSize.height);
  68   }
  69   nsSize& operator+=(const nsSize& aSize) {width += aSize.width;
  70                                            height += aSize.height;
  71                                            return *this;}
  72
  73   // Converts this size from aFromAPP, an appunits per pixel ratio, to aToAPP.
  74   inline nsSize ConvertAppUnits(PRInt32 aFromAPP, PRInt32 aToAPP) const;
  75 };
  76
  77 struct nsIntSize {
  78   PRInt32 width, height;
  79
  80   nsIntSize() {}
  81   nsIntSize(const nsIntSize& aSize) {width = aSize.width; height = aSize.height;}
  82   nsIntSize(PRInt32 aWidth, PRInt32 aHeight) {width = aWidth; height = aHeight;}
  83
  84   // Overloaded operators. Note that '=' isn't defined so we'll get the
  85   // compiler generated default assignment operator
  86   PRBool  operator==(const nsIntSize& aSize) const {
  87     return (PRBool) ((width == aSize.width) && (height == aSize.height));
  88   }
  89   PRBool  operator!=(const nsIntSize& aSize) const {
  90     return (PRBool) ((width != aSize.width) || (height != aSize.height));
  91   }
  92   PRBool  operator<(const nsIntSize& aSize) const {
  93     return (PRBool) (operator<=(aSize) &&
  94                      (width < aSize.width || height < aSize.height));
  95   }
  96   PRBool  operator<=(const nsIntSize& aSize) const {
  97     return (PRBool) ((width <= aSize.width) && (height <= aSize.height));
  98   }
  99
 100   void SizeTo(PRInt32 aWidth, PRInt32 aHeight) {width = aWidth; height = aHeight;}
 101 };
 102
 103 inline nsSize
 104 nsSize::ConvertAppUnits(PRInt32 aFromAPP, PRInt32 aToAPP) const {
 105   if (aFromAPP != aToAPP) {
 106     nsSize size;
 107     size.width = NSToCoordRound(NSCoordScale(width, aFromAPP, aToAPP));
 108     size.height = NSToCoordRound(NSCoordScale(height, aFromAPP, aToAPP));
 109     return size;
 110   }
 111   return *this;
 112 }
 113
 114 #endif /* NSSIZE_H */