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comparison: gfx/thebes/gfxRect.h

gfx/thebes/gfxRect.h

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1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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 GFX_RECT_H
7 #define GFX_RECT_H
8
9 #include "gfxTypes.h"
10 #include "gfxPoint.h"
11 #include "nsDebug.h"
12 #include "nsRect.h"
13 #include "mozilla/gfx/BaseMargin.h"
14 #include "mozilla/gfx/BaseRect.h"
15 #include "mozilla/Assertions.h"
16
17 struct gfxMargin : public mozilla::gfx::BaseMargin<gfxFloat, gfxMargin> {
18 typedef mozilla::gfx::BaseMargin<gfxFloat, gfxMargin> Super;
19
20 // Constructors
21 gfxMargin() : Super() {}
22 gfxMargin(const gfxMargin& aMargin) : Super(aMargin) {}
23 gfxMargin(gfxFloat aTop, gfxFloat aRight, gfxFloat aBottom, gfxFloat aLeft)
24 : Super(aTop, aRight, aBottom, aLeft) {}
25 };
26
27 namespace mozilla {
28 namespace css {
29 enum Corner {
30 // this order is important!
31 eCornerTopLeft = 0,
32 eCornerTopRight = 1,
33 eCornerBottomRight = 2,
34 eCornerBottomLeft = 3,
35 eNumCorners = 4
36 };
37 }
38 }
39 #define NS_CORNER_TOP_LEFT mozilla::css::eCornerTopLeft
40 #define NS_CORNER_TOP_RIGHT mozilla::css::eCornerTopRight
41 #define NS_CORNER_BOTTOM_RIGHT mozilla::css::eCornerBottomRight
42 #define NS_CORNER_BOTTOM_LEFT mozilla::css::eCornerBottomLeft
43 #define NS_NUM_CORNERS mozilla::css::eNumCorners
44
45 #define NS_FOR_CSS_CORNERS(var_) \
46 for (mozilla::css::Corner var_ = NS_CORNER_TOP_LEFT; \
47 var_ <= NS_CORNER_BOTTOM_LEFT; \
48 var_++)
49
50 static inline mozilla::css::Corner operator++(mozilla::css::Corner& corner, int) {
51 NS_PRECONDITION(corner >= NS_CORNER_TOP_LEFT &&
52 corner < NS_NUM_CORNERS, "Out of range corner");
53 corner = mozilla::css::Corner(corner + 1);
54 return corner;
55 }
56
57 struct gfxRect :
58 public mozilla::gfx::BaseRect<gfxFloat, gfxRect, gfxPoint, gfxSize, gfxMargin> {
59 typedef mozilla::gfx::BaseRect<gfxFloat, gfxRect, gfxPoint, gfxSize, gfxMargin> Super;
60
61 gfxRect() : Super() {}
62 gfxRect(const gfxPoint& aPos, const gfxSize& aSize) :
63 Super(aPos, aSize) {}
64 gfxRect(gfxFloat aX, gfxFloat aY, gfxFloat aWidth, gfxFloat aHeight) :
65 Super(aX, aY, aWidth, aHeight) {}
66 gfxRect(const nsIntRect& aRect) :
67 Super(aRect.x, aRect.y, aRect.width, aRect.height) {}
68
69 /**
70 * Return true if all components of this rect are within
71 * aEpsilon of integer coordinates, defined as
72 * |round(coord) - coord| <= |aEpsilon|
73 * for x,y,width,height.
74 */
75 bool WithinEpsilonOfIntegerPixels(gfxFloat aEpsilon) const;
76
77 gfxPoint AtCorner(mozilla::css::Corner corner) const {
78 switch (corner) {
79 case NS_CORNER_TOP_LEFT: return TopLeft();
80 case NS_CORNER_TOP_RIGHT: return TopRight();
81 case NS_CORNER_BOTTOM_RIGHT: return BottomRight();
82 case NS_CORNER_BOTTOM_LEFT: return BottomLeft();
83 default:
84 NS_ERROR("Invalid corner!");
85 break;
86 }
87 return gfxPoint(0.0, 0.0);
88 }
89
90 gfxPoint CCWCorner(mozilla::css::Side side) const {
91 switch (side) {
92 case NS_SIDE_TOP: return TopLeft();
93 case NS_SIDE_RIGHT: return TopRight();
94 case NS_SIDE_BOTTOM: return BottomRight();
95 case NS_SIDE_LEFT: return BottomLeft();
96 }
97 MOZ_CRASH("Incomplete switch");
98 }
99
100 gfxPoint CWCorner(mozilla::css::Side side) const {
101 switch (side) {
102 case NS_SIDE_TOP: return TopRight();
103 case NS_SIDE_RIGHT: return BottomRight();
104 case NS_SIDE_BOTTOM: return BottomLeft();
105 case NS_SIDE_LEFT: return TopLeft();
106 }
107 MOZ_CRASH("Incomplete switch");
108 }
109
110 /* Conditions this border to Cairo's max coordinate space.
111 * The caller can check IsEmpty() after Condition() -- if it's TRUE,
112 * the caller can possibly avoid doing any extra rendering.
113 */
114 void Condition();
115
116 void Scale(gfxFloat k) {
117 NS_ASSERTION(k >= 0.0, "Invalid (negative) scale factor");
118 x *= k;
119 y *= k;
120 width *= k;
121 height *= k;
122 }
123
124 void Scale(gfxFloat sx, gfxFloat sy) {
125 NS_ASSERTION(sx >= 0.0, "Invalid (negative) scale factor");
126 NS_ASSERTION(sy >= 0.0, "Invalid (negative) scale factor");
127 x *= sx;
128 y *= sy;
129 width *= sx;
130 height *= sy;
131 }
132
133 void ScaleInverse(gfxFloat k) {
134 NS_ASSERTION(k > 0.0, "Invalid (negative) scale factor");
135 x /= k;
136 y /= k;
137 width /= k;
138 height /= k;
139 }
140 };
141
142 struct gfxCornerSizes {
143 gfxSize sizes[NS_NUM_CORNERS];
144
145 gfxCornerSizes () { }
146
147 gfxCornerSizes (gfxFloat v) {
148 for (int i = 0; i < NS_NUM_CORNERS; i++)
149 sizes[i].SizeTo(v, v);
150 }
151
152 gfxCornerSizes (gfxFloat tl, gfxFloat tr, gfxFloat br, gfxFloat bl) {
153 sizes[NS_CORNER_TOP_LEFT].SizeTo(tl, tl);
154 sizes[NS_CORNER_TOP_RIGHT].SizeTo(tr, tr);
155 sizes[NS_CORNER_BOTTOM_RIGHT].SizeTo(br, br);
156 sizes[NS_CORNER_BOTTOM_LEFT].SizeTo(bl, bl);
157 }
158
159 gfxCornerSizes (const gfxSize& tl, const gfxSize& tr, const gfxSize& br, const gfxSize& bl) {
160 sizes[NS_CORNER_TOP_LEFT] = tl;
161 sizes[NS_CORNER_TOP_RIGHT] = tr;
162 sizes[NS_CORNER_BOTTOM_RIGHT] = br;
163 sizes[NS_CORNER_BOTTOM_LEFT] = bl;
164 }
165
166 const gfxSize& operator[] (mozilla::css::Corner index) const {
167 return sizes[index];
168 }
169
170 gfxSize& operator[] (mozilla::css::Corner index) {
171 return sizes[index];
172 }
173
174 void Scale(gfxFloat aXScale, gfxFloat aYScale)
175 {
176 for (int i = 0; i < NS_NUM_CORNERS; i++)
177 sizes[i].Scale(aXScale, aYScale);
178 }
179
180 const gfxSize TopLeft() const { return sizes[NS_CORNER_TOP_LEFT]; }
181 gfxSize& TopLeft() { return sizes[NS_CORNER_TOP_LEFT]; }
182
183 const gfxSize TopRight() const { return sizes[NS_CORNER_TOP_RIGHT]; }
184 gfxSize& TopRight() { return sizes[NS_CORNER_TOP_RIGHT]; }
185
186 const gfxSize BottomLeft() const { return sizes[NS_CORNER_BOTTOM_LEFT]; }
187 gfxSize& BottomLeft() { return sizes[NS_CORNER_BOTTOM_LEFT]; }
188
189 const gfxSize BottomRight() const { return sizes[NS_CORNER_BOTTOM_RIGHT]; }
190 gfxSize& BottomRight() { return sizes[NS_CORNER_BOTTOM_RIGHT]; }
191 };
192 #endif /* GFX_RECT_H */

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