gfx/src/nsSize.h
author Makoto Kato <m_kato>
Tue, 21 Dec 2010 00:01:00 -0800
changeset 60059 a31e58c375b64b3115256ca39beb641ddf755c06
parent 48026 432bca3dd7bae26289e7f112ed2baf12459789ac
child 68273 848c520e915846251f41a2ac5505007c7aa12007
permissions -rw-r--r--
Bug 619670 - onLowMemory may not work on android. Need to forward event. r=dougt/blassey. a=blocking-fennec

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#ifndef NSSIZE_H
#define NSSIZE_H

#include "nsCoord.h"

// Maximum allowable size
#define NS_MAXSIZE nscoord_MAX

struct nsSize {
  nscoord width, height;

  // Constructors
  nsSize() {}
  nsSize(const nsSize& aSize) {width = aSize.width; height = aSize.height;}
  nsSize(nscoord aWidth, nscoord aHeight) {width = aWidth; height = aHeight;}

  void SizeTo(nscoord aWidth, nscoord aHeight) {width = aWidth; height = aHeight;}
  void SizeBy(nscoord aDeltaWidth, nscoord aDeltaHeight) {width += aDeltaWidth;
                                                          height += aDeltaHeight;}

  // Overloaded operators. Note that '=' isn't defined so we'll get the
  // compiler generated default assignment operator
  PRBool  operator==(const nsSize& aSize) const {
    return (PRBool) ((width == aSize.width) && (height == aSize.height));
  }
  PRBool  operator!=(const nsSize& aSize) const {
    return (PRBool) ((width != aSize.width) || (height != aSize.height));
  }
  nsSize operator+(const nsSize& aSize) const {
    return nsSize(width + aSize.width, height + aSize.height);
  }
  nsSize& operator+=(const nsSize& aSize) {width += aSize.width;
                                           height += aSize.height;
                                           return *this;}

  // Converts this size from aFromAPP, an appunits per pixel ratio, to aToAPP.
  inline nsSize ConvertAppUnits(PRInt32 aFromAPP, PRInt32 aToAPP) const;
};

struct nsIntSize {
  PRInt32 width, height;

  nsIntSize() {}
  nsIntSize(const nsIntSize& aSize) {width = aSize.width; height = aSize.height;}
  nsIntSize(PRInt32 aWidth, PRInt32 aHeight) {width = aWidth; height = aHeight;}

  // Overloaded operators. Note that '=' isn't defined so we'll get the
  // compiler generated default assignment operator
  PRBool  operator==(const nsIntSize& aSize) const {
    return (PRBool) ((width == aSize.width) && (height == aSize.height));
  }
  PRBool  operator!=(const nsIntSize& aSize) const {
    return (PRBool) ((width != aSize.width) || (height != aSize.height));
  }
  PRBool  operator<(const nsIntSize& aSize) const {
    return (PRBool) (operator<=(aSize) &&
                     (width < aSize.width || height < aSize.height));
  }
  PRBool  operator<=(const nsIntSize& aSize) const {
    return (PRBool) ((width <= aSize.width) && (height <= aSize.height));
  }

  void SizeTo(PRInt32 aWidth, PRInt32 aHeight) {width = aWidth; height = aHeight;}
};

inline nsSize
nsSize::ConvertAppUnits(PRInt32 aFromAPP, PRInt32 aToAPP) const {
  if (aFromAPP != aToAPP) {
    nsSize size;
    size.width = NSToCoordRound(NSCoordScale(width, aFromAPP, aToAPP));
    size.height = NSToCoordRound(NSCoordScale(height, aFromAPP, aToAPP));
    return size;
  }
  return *this;
}

#endif /* NSSIZE_H */