1/*
2 * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2010 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
22 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef RoundedRect_h
28#define RoundedRect_h
29
30#include "FloatQuad.h"
31#include "LayoutRect.h"
32#include "LayoutSize.h"
33
34namespace WebCore {
35
36class FloatRoundedRect;
37class LayoutUnit;
38class Region;
39
40class RoundedRect {
41public:
42 class Radii {
43 public:
44 Radii() {}
45 Radii(const LayoutSize& topLeft, const LayoutSize& topRight, const LayoutSize& bottomLeft, const LayoutSize& bottomRight)
46 : m_topLeft(topLeft)
47 , m_topRight(topRight)
48 , m_bottomLeft(bottomLeft)
49 , m_bottomRight(bottomRight)
50 {
51 }
52
53 void setTopLeft(const LayoutSize& size) { m_topLeft = size; }
54 void setTopRight(const LayoutSize& size) { m_topRight = size; }
55 void setBottomLeft(const LayoutSize& size) { m_bottomLeft = size; }
56 void setBottomRight(const LayoutSize& size) { m_bottomRight = size; }
57 const LayoutSize& topLeft() const { return m_topLeft; }
58 const LayoutSize& topRight() const { return m_topRight; }
59 const LayoutSize& bottomLeft() const { return m_bottomLeft; }
60 const LayoutSize& bottomRight() const { return m_bottomRight; }
61
62 bool isZero() const;
63
64 void includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge);
65 void excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge);
66
67 void scale(float factor);
68 void expand(const LayoutUnit& topWidth, const LayoutUnit& bottomWidth, const LayoutUnit& leftWidth, const LayoutUnit& rightWidth);
69 void expand(const LayoutUnit& size) { expand(size, size, size, size); }
70 void shrink(const LayoutUnit& topWidth, const LayoutUnit& bottomWidth, const LayoutUnit& leftWidth, const LayoutUnit& rightWidth) { expand(-topWidth, -bottomWidth, -leftWidth, -rightWidth); }
71 void shrink(const LayoutUnit& size) { shrink(size, size, size, size); }
72
73 Radii transposedRadii() const { return Radii(m_topLeft.transposedSize(), m_topRight.transposedSize(), m_bottomLeft.transposedSize(), m_bottomRight.transposedSize()); }
74
75 private:
76 LayoutSize m_topLeft;
77 LayoutSize m_topRight;
78 LayoutSize m_bottomLeft;
79 LayoutSize m_bottomRight;
80 };
81
82 WEBCORE_EXPORT explicit RoundedRect(const LayoutRect&, const Radii& = Radii());
83 RoundedRect(const LayoutUnit&, const LayoutUnit&, const LayoutUnit& width, const LayoutUnit& height);
84 WEBCORE_EXPORT RoundedRect(const LayoutRect&, const LayoutSize& topLeft, const LayoutSize& topRight, const LayoutSize& bottomLeft, const LayoutSize& bottomRight);
85
86 const LayoutRect& rect() const { return m_rect; }
87 const Radii& radii() const { return m_radii; }
88 bool isRounded() const { return !m_radii.isZero(); }
89 bool isEmpty() const { return m_rect.isEmpty(); }
90
91 void setRect(const LayoutRect& rect) { m_rect = rect; }
92 void setRadii(const Radii& radii) { m_radii = radii; }
93
94 void move(const LayoutSize& size) { m_rect.move(size); }
95 void moveBy(const LayoutPoint& offset) { m_rect.moveBy(offset); }
96 void inflate(const LayoutUnit& size) { m_rect.inflate(size); }
97 void inflateWithRadii(const LayoutUnit& size);
98 void expandRadii(const LayoutUnit& size) { m_radii.expand(size); }
99 void shrinkRadii(const LayoutUnit& size) { m_radii.shrink(size); }
100
101 void includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge);
102 void excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge);
103
104 bool isRenderable() const;
105 void adjustRadii();
106
107 // Tests whether the quad intersects any part of this rounded rectangle.
108 // This only works for convex quads.
109 bool intersectsQuad(const FloatQuad&) const;
110 WEBCORE_EXPORT bool contains(const LayoutRect&) const;
111
112 FloatRoundedRect pixelSnappedRoundedRectForPainting(float deviceScaleFactor) const;
113
114 RoundedRect transposedRect() const { return RoundedRect(m_rect.transposedRect(), m_radii.transposedRadii()); }
115
116private:
117 LayoutRect m_rect;
118 Radii m_radii;
119};
120
121inline bool operator==(const RoundedRect::Radii& a, const RoundedRect::Radii& b)
122{
123 return a.topLeft() == b.topLeft() && a.topRight() == b.topRight() && a.bottomLeft() == b.bottomLeft() && a.bottomRight() == b.bottomRight();
124}
125
126inline bool operator==(const RoundedRect& a, const RoundedRect& b)
127{
128 return a.rect() == b.rect() && a.radii() == b.radii();
129}
130
131// Snip away rectangles from corners, roughly one per step length of arc.
132WEBCORE_EXPORT Region approximateAsRegion(const RoundedRect&, unsigned stepLength = 20);
133
134} // namespace WebCore
135
136#endif // RoundedRect_h
137