1/*
2 * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
3 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20*/
21
22#include "config.h"
23#include "HitTestLocation.h"
24
25namespace WebCore {
26
27HitTestLocation::HitTestLocation()
28 : m_isRectBased(false)
29 , m_isRectilinear(true)
30{
31}
32
33HitTestLocation::HitTestLocation(const LayoutPoint& point)
34 : m_point(point)
35 , m_boundingBox(rectForPoint(point, 0, 0, 0, 0))
36 , m_transformedPoint(point)
37 , m_transformedRect(m_boundingBox)
38 , m_isRectBased(false)
39 , m_isRectilinear(true)
40{
41}
42
43HitTestLocation::HitTestLocation(const FloatPoint& point)
44 : m_point(flooredLayoutPoint(point))
45 , m_boundingBox(rectForPoint(m_point, 0, 0, 0, 0))
46 , m_transformedPoint(point)
47 , m_transformedRect(m_boundingBox)
48 , m_isRectBased(false)
49 , m_isRectilinear(true)
50{
51}
52
53HitTestLocation::HitTestLocation(const FloatPoint& point, const FloatQuad& quad)
54 : m_transformedPoint(point)
55 , m_transformedRect(quad)
56 , m_isRectBased(true)
57{
58 m_point = flooredLayoutPoint(point);
59 m_boundingBox = enclosingIntRect(quad.boundingBox());
60 m_isRectilinear = quad.isRectilinear();
61}
62
63HitTestLocation::HitTestLocation(const LayoutPoint& centerPoint, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding)
64 : m_point(centerPoint)
65 , m_boundingBox(rectForPoint(centerPoint, topPadding, rightPadding, bottomPadding, leftPadding))
66 , m_transformedPoint(centerPoint)
67 , m_isRectBased(topPadding || rightPadding || bottomPadding || leftPadding)
68 , m_isRectilinear(true)
69{
70 m_transformedRect = FloatQuad(m_boundingBox);
71}
72
73HitTestLocation::HitTestLocation(const HitTestLocation& other, const LayoutSize& offset)
74 : m_point(other.m_point)
75 , m_boundingBox(other.m_boundingBox)
76 , m_transformedPoint(other.m_transformedPoint)
77 , m_transformedRect(other.m_transformedRect)
78 , m_isRectBased(other.m_isRectBased)
79 , m_isRectilinear(other.m_isRectilinear)
80{
81 move(offset);
82}
83
84HitTestLocation::HitTestLocation(const HitTestLocation& other)
85 : m_point(other.m_point)
86 , m_boundingBox(other.m_boundingBox)
87 , m_transformedPoint(other.m_transformedPoint)
88 , m_transformedRect(other.m_transformedRect)
89 , m_isRectBased(other.m_isRectBased)
90 , m_isRectilinear(other.m_isRectilinear)
91{
92}
93
94HitTestLocation::~HitTestLocation() = default;
95
96HitTestLocation& HitTestLocation::operator=(const HitTestLocation& other)
97{
98 m_point = other.m_point;
99 m_boundingBox = other.m_boundingBox;
100 m_transformedPoint = other.m_transformedPoint;
101 m_transformedRect = other.m_transformedRect;
102 m_isRectBased = other.m_isRectBased;
103 m_isRectilinear = other.m_isRectilinear;
104
105 return *this;
106}
107
108void HitTestLocation::move(const LayoutSize& offset)
109{
110 m_point.move(offset);
111 m_transformedPoint.move(offset);
112 m_transformedRect.move(offset);
113 m_boundingBox = enclosingIntRect(m_transformedRect.boundingBox());
114}
115
116template<typename RectType>
117bool HitTestLocation::intersectsRect(const RectType& rect) const
118{
119 // FIXME: When the hit test is not rect based we should use rect.contains(m_point).
120 // That does change some corner case tests though.
121
122 // First check if rect even intersects our bounding box.
123 if (!rect.intersects(m_boundingBox))
124 return false;
125
126 // If the transformed rect is rectilinear the bounding box intersection was accurate.
127 if (m_isRectilinear)
128 return true;
129
130 // If rect fully contains our bounding box, we are also sure of an intersection.
131 if (rect.contains(m_boundingBox))
132 return true;
133
134 // Otherwise we need to do a slower quad based intersection test.
135 return m_transformedRect.intersectsRect(rect);
136}
137
138bool HitTestLocation::intersects(const LayoutRect& rect) const
139{
140 return intersectsRect(rect);
141}
142
143bool HitTestLocation::intersects(const FloatRect& rect) const
144{
145 return intersectsRect(rect);
146}
147
148bool HitTestLocation::intersects(const RoundedRect& rect) const
149{
150 return rect.intersectsQuad(m_transformedRect);
151}
152
153IntRect HitTestLocation::rectForPoint(const LayoutPoint& point, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding)
154{
155 IntPoint actualPoint(flooredIntPoint(point));
156 actualPoint -= IntSize(leftPadding, topPadding);
157
158 IntSize actualPadding(leftPadding + rightPadding, topPadding + bottomPadding);
159 // As IntRect is left inclusive and right exclusive (seeing IntRect::contains(x, y)), adding "1".
160 // FIXME: Remove this once non-rect based hit-detection stops using IntRect:intersects.
161 actualPadding += IntSize(1, 1);
162
163 return IntRect(actualPoint, actualPadding);
164}
165
166} // namespace WebCore
167