dom/svg/SVGPoint.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef DOM_SVG_SVGPOINT_H_
   8 #define DOM_SVG_SVGPOINT_H_
   9
  10 #include "nsDebug.h"
  11 #include "gfxPoint.h"
  12 #include "mozilla/gfx/Point.h"
  13 #include "mozilla/FloatingPoint.h"
  14
  15 namespace mozilla {
  16
  17 /**
  18  * This class is currently used for point list attributes.
  19  *
  20  * The DOM wrapper class for this class is DOMSVGPoint.
  21  */
  22 class SVGPoint {
  23   using Point = mozilla::gfx::Point;
  24
  25  public:
  26   SVGPoint() : mX(0.0f), mY(0.0f) {}
  27
  28   SVGPoint(float aX, float aY) : mX(aX), mY(aY) {
  29     NS_ASSERTION(IsValid(), "Constructed an invalid SVGPoint");
  30   }
  31
  32   bool operator==(const SVGPoint& rhs) const {
  33     return mX == rhs.mX && mY == rhs.mY;
  34   }
  35
  36   SVGPoint& operator+=(const SVGPoint& rhs) {
  37     mX += rhs.mX;
  38     mY += rhs.mY;
  39     return *this;
  40   }
  41
  42   operator gfxPoint() const { return gfxPoint(mX, mY); }
  43
  44   operator Point() const { return Point(mX, mY); }
  45
  46 #ifdef DEBUG
  47   bool IsValid() const { return IsFinite(mX) && IsFinite(mY); }
  48 #endif
  49
  50   void SetX(float aX) { mX = aX; }
  51   void SetY(float aY) { mY = aY; }
  52   float GetX() const { return mX; }
  53   float GetY() const { return mY; }
  54
  55   bool operator!=(const SVGPoint& rhs) const {
  56     return mX != rhs.mX || mY != rhs.mY;
  57   }
  58
  59   float mX;
  60   float mY;
  61 };
  62
  63 inline SVGPoint operator+(const SVGPoint& aP1, const SVGPoint& aP2) {
  64   return SVGPoint(aP1.mX + aP2.mX, aP1.mY + aP2.mY);
  65 }
  66
  67 inline SVGPoint operator-(const SVGPoint& aP1, const SVGPoint& aP2) {
  68   return SVGPoint(aP1.mX - aP2.mX, aP1.mY - aP2.mY);
  69 }
  70
  71 inline SVGPoint operator*(float aFactor, const SVGPoint& aPoint) {
  72   return SVGPoint(aFactor * aPoint.mX, aFactor * aPoint.mY);
  73 }
  74
  75 inline SVGPoint operator*(const SVGPoint& aPoint, float aFactor) {
  76   return SVGPoint(aFactor * aPoint.mX, aFactor * aPoint.mY);
  77 }
  78
  79 }  // namespace mozilla
  80
  81 #endif  // DOM_SVG_SVGPOINT_H_