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comparison: gfx/2d/BaseSize.h
gfx/2d/BaseSize.h
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:6c42d3014a55 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef MOZILLA_GFX_BASESIZE_H_ | |
| 7 #define MOZILLA_GFX_BASESIZE_H_ | |
| 8 | |
| 9 #include "mozilla/Attributes.h" | |
| 10 | |
| 11 namespace mozilla { | |
| 12 namespace gfx { | |
| 13 | |
| 14 /** | |
| 15 * Do not use this class directly. Subclass it, pass that subclass as the | |
| 16 * Sub parameter, and only use that subclass. This allows methods to safely | |
| 17 * cast 'this' to 'Sub*'. | |
| 18 */ | |
| 19 template <class T, class Sub> | |
| 20 struct BaseSize { | |
| 21 T width, height; | |
| 22 | |
| 23 // Constructors | |
| 24 MOZ_CONSTEXPR BaseSize() : width(0), height(0) {} | |
| 25 MOZ_CONSTEXPR BaseSize(T aWidth, T aHeight) : width(aWidth), height(aHeight) {} | |
| 26 | |
| 27 void SizeTo(T aWidth, T aHeight) { width = aWidth; height = aHeight; } | |
| 28 | |
| 29 bool IsEmpty() const { | |
| 30 return width == 0 || height == 0; | |
| 31 } | |
| 32 | |
| 33 // Note that '=' isn't defined so we'll get the | |
| 34 // compiler generated default assignment operator | |
| 35 | |
| 36 bool operator==(const Sub& aSize) const { | |
| 37 return width == aSize.width && height == aSize.height; | |
| 38 } | |
| 39 bool operator!=(const Sub& aSize) const { | |
| 40 return width != aSize.width || height != aSize.height; | |
| 41 } | |
| 42 bool operator<=(const Sub& aSize) const { | |
| 43 return width <= aSize.width && height <= aSize.height; | |
| 44 } | |
| 45 bool operator<(const Sub& aSize) const { | |
| 46 return *this <= aSize && *this != aSize; | |
| 47 } | |
| 48 | |
| 49 Sub operator+(const Sub& aSize) const { | |
| 50 return Sub(width + aSize.width, height + aSize.height); | |
| 51 } | |
| 52 Sub operator-(const Sub& aSize) const { | |
| 53 return Sub(width - aSize.width, height - aSize.height); | |
| 54 } | |
| 55 Sub& operator+=(const Sub& aSize) { | |
| 56 width += aSize.width; | |
| 57 height += aSize.height; | |
| 58 return *static_cast<Sub*>(this); | |
| 59 } | |
| 60 Sub& operator-=(const Sub& aSize) { | |
| 61 width -= aSize.width; | |
| 62 height -= aSize.height; | |
| 63 return *static_cast<Sub*>(this); | |
| 64 } | |
| 65 | |
| 66 Sub operator*(T aScale) const { | |
| 67 return Sub(width * aScale, height * aScale); | |
| 68 } | |
| 69 Sub operator/(T aScale) const { | |
| 70 return Sub(width / aScale, height / aScale); | |
| 71 } | |
| 72 void Scale(T aXScale, T aYScale) { | |
| 73 width *= aXScale; | |
| 74 height *= aYScale; | |
| 75 } | |
| 76 | |
| 77 Sub operator*(const Sub& aSize) const { | |
| 78 return Sub(width * aSize.width, height * aSize.height); | |
| 79 } | |
| 80 Sub operator/(const Sub& aSize) const { | |
| 81 return Sub(width / aSize.width, height / aSize.height); | |
| 82 } | |
| 83 }; | |
| 84 | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 #endif /* MOZILLA_GFX_BASESIZE_H_ */ |
