third_party/WebKit/Source/platform/geometry/DoubleSize.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef DoubleSize_h
   6 #define DoubleSize_h
   7
   8 #include "platform/geometry/FloatSize.h"
   9 #include "platform/geometry/IntSize.h"
  10 #include "wtf/MathExtras.h"
  11
  12 namespace blink {
  13
  14 class LayoutSize;
  15
  16 class PLATFORM_EXPORT DoubleSize {
  17 public:
  18     DoubleSize() : m_width(0), m_height(0) { }
  19     DoubleSize(double width, double height) : m_width(width), m_height(height) { }
  20     DoubleSize(const IntSize& p) : m_width(p.width()), m_height(p.height()) { }
  21     DoubleSize(const FloatSize& s) : m_width(s.width()), m_height(s.height()) { }
  22     explicit DoubleSize(const LayoutSize&);
  23
  24     double width() const { return m_width; }
  25     double height() const { return m_height; }
  26
  27     void setWidth(double width) { m_width = width; }
  28     void setHeight(double height) { m_height = height; }
  29
  30     bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
  31
  32     bool isZero() const;
  33
  34     void expand(float width, float height)
  35     {
  36         m_width += width;
  37         m_height += height;
  38     }
  39
  40     void scale(float widthScale, float heightScale)
  41     {
  42         m_width = m_width * widthScale;
  43         m_height = m_height * heightScale;
  44     }
  45
  46     void scale(float scale)
  47     {
  48         this->scale(scale, scale);
  49     }
  50
  51 private:
  52     double m_width, m_height;
  53 };
  54
  55 inline DoubleSize& operator+=(DoubleSize& a, const DoubleSize& b)
  56 {
  57     a.setWidth(a.width() + b.width());
  58     a.setHeight(a.height() + b.height());
  59     return a;
  60 }
  61
  62 inline DoubleSize& operator-=(DoubleSize& a, const DoubleSize& b)
  63 {
  64     a.setWidth(a.width() - b.width());
  65     a.setHeight(a.height() - b.height());
  66     return a;
  67 }
  68
  69 inline DoubleSize operator+(const DoubleSize& a, const DoubleSize& b)
  70 {
  71     return DoubleSize(a.width() + b.width(), a.height() + b.height());
  72 }
  73
  74 inline DoubleSize operator-(const DoubleSize& a, const DoubleSize& b)
  75 {
  76     return DoubleSize(a.width() - b.width(), a.height() - b.height());
  77 }
  78
  79 inline bool operator==(const DoubleSize& a, const DoubleSize& b)
  80 {
  81     return a.width() == b.width() && a.height() == b.height();
  82 }
  83
  84 inline bool operator!=(const DoubleSize& a, const DoubleSize& b)
  85 {
  86     return a.width() != b.width() || a.height() != b.height();
  87 }
  88
  89 inline IntSize flooredIntSize(const DoubleSize& p)
  90 {
  91     return IntSize(clampTo<int>(floor(p.width())), clampTo<int>(floor(p.height())));
  92 }
  93
  94 inline IntSize roundedIntSize(const DoubleSize& p)
  95 {
  96     return IntSize(clampTo<int>(roundf(p.width())), clampTo<int>(roundf(p.height())));
  97 }
  98
  99 inline IntSize expandedIntSize(const DoubleSize& p)
 100 {
 101     return IntSize(clampTo<int>(ceilf(p.width())), clampTo<int>(ceilf(p.height())));
 102 }
 103
 104 inline FloatSize toFloatSize(const DoubleSize& p)
 105 {
 106     return FloatSize(p.width(), p.height());
 107 }
 108
 109 } // namespace blink
 110
 111 #endif // DoubleSize_h