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 25#include "CachedImage.h" 26#include "DocumentMarkerController.h" 27#include "Frame.h" 28#include "FrameSelection.h" 29#include "FrameTree.h" 30#include "HTMLAnchorElement.h" 31#include "HTMLImageElement.h" 32#include "HTMLInputElement.h" 33#include "HTMLMediaElement.h" 34#include "HTMLNames.h" 35#include "HTMLParserIdioms.h" 36#include "HTMLPlugInImageElement.h" 37#include "HTMLVideoElement.h" 38#include "RenderBlock.h" 39#include "RenderImage.h" 40#include "RenderInline.h" 41#include "Scrollbar.h" 42#include "SVGNames.h" 43#include "XLinkNames.h" 44 45namespace WebCore { 46 47using namespace HTMLNames; 48 49HitTestLocation::HitTestLocation() 50 : m_isRectBased(false) 51 , m_isRectilinear(true) 52{ 53} 54 55HitTestLocation::HitTestLocation(const LayoutPoint& point) 56 : m_point(point) 57 , m_boundingBox(rectForPoint(point, 0, 0, 0, 0)) 58 , m_transformedPoint(point) 59 , m_transformedRect(m_boundingBox) 60 , m_isRectBased(false) 61 , m_isRectilinear(true) 62{ 63} 64 65HitTestLocation::HitTestLocation(const FloatPoint& point) 66 : m_point(flooredLayoutPoint(point)) 67 , m_boundingBox(rectForPoint(m_point, 0, 0, 0, 0)) 68 , m_transformedPoint(point) 69 , m_transformedRect(m_boundingBox) 70 , m_isRectBased(false) 71 , m_isRectilinear(true) 72{ 73} 74 75HitTestLocation::HitTestLocation(const FloatPoint& point, const FloatQuad& quad) 76 : m_transformedPoint(point) 77 , m_transformedRect(quad) 78 , m_isRectBased(true) 79{ 80 m_point = flooredLayoutPoint(point); 81 m_boundingBox = enclosingIntRect(quad.boundingBox()); 82 m_isRectilinear = quad.isRectilinear(); 83} 84 85HitTestLocation::HitTestLocation(const LayoutPoint& centerPoint, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding) 86 : m_point(centerPoint) 87 , m_boundingBox(rectForPoint(centerPoint, topPadding, rightPadding, bottomPadding, leftPadding)) 88 , m_transformedPoint(centerPoint) 89 , m_isRectBased(topPadding || rightPadding || bottomPadding || leftPadding) 90 , m_isRectilinear(true) 91{ 92 m_transformedRect = FloatQuad(m_boundingBox); 93} 94 95HitTestLocation::HitTestLocation(const HitTestLocation& other, const LayoutSize& offset) 96 : m_point(other.m_point) 97 , m_boundingBox(other.m_boundingBox) 98 , m_transformedPoint(other.m_transformedPoint) 99 , m_transformedRect(other.m_transformedRect) 100 , m_isRectBased(other.m_isRectBased) 101 , m_isRectilinear(other.m_isRectilinear) 102{ 103 move(offset); 104} 105 106HitTestLocation::HitTestLocation(const HitTestLocation& other) 107 : m_point(other.m_point) 108 , m_boundingBox(other.m_boundingBox) 109 , m_transformedPoint(other.m_transformedPoint) 110 , m_transformedRect(other.m_transformedRect) 111 , m_isRectBased(other.m_isRectBased) 112 , m_isRectilinear(other.m_isRectilinear) 113{ 114} 115 116HitTestLocation::~HitTestLocation() 117{ 118} 119 120HitTestLocation& HitTestLocation::operator=(const HitTestLocation& other) 121{ 122 m_point = other.m_point; 123 m_boundingBox = other.m_boundingBox; 124 m_transformedPoint = other.m_transformedPoint; 125 m_transformedRect = other.m_transformedRect; 126 m_isRectBased = other.m_isRectBased; 127 m_isRectilinear = other.m_isRectilinear; 128 129 return *this; 130} 131 132void HitTestLocation::move(const LayoutSize& offset) 133{ 134 m_point.move(offset); 135 m_transformedPoint.move(offset); 136 m_transformedRect.move(offset); 137 m_boundingBox = enclosingIntRect(m_transformedRect.boundingBox()); 138} 139 140template<typename RectType> 141bool HitTestLocation::intersectsRect(const RectType& rect) const 142{ 143 // FIXME: When the hit test is not rect based we should use rect.contains(m_point). 144 // That does change some corner case tests though. 145 146 // First check if rect even intersects our bounding box. 147 if (!rect.intersects(m_boundingBox)) 148 return false; 149 150 // If the transformed rect is rectilinear the bounding box intersection was accurate. 151 if (m_isRectilinear) 152 return true; 153 154 // If rect fully contains our bounding box, we are also sure of an intersection. 155 if (rect.contains(m_boundingBox)) 156 return true; 157 158 // Otherwise we need to do a slower quad based intersection test. 159 return m_transformedRect.intersectsRect(rect); 160} 161 162bool HitTestLocation::intersects(const LayoutRect& rect) const 163{ 164 return intersectsRect(rect); 165} 166 167bool HitTestLocation::intersects(const FloatRect& rect) const 168{ 169 return intersectsRect(rect); 170} 171 172bool HitTestLocation::intersects(const RoundedRect& rect) const 173{ 174 return rect.intersectsQuad(m_transformedRect); 175} 176 177IntRect HitTestLocation::rectForPoint(const LayoutPoint& point, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding) 178{ 179 IntPoint actualPoint(flooredIntPoint(point)); 180 actualPoint -= IntSize(leftPadding, topPadding); 181 182 IntSize actualPadding(leftPadding + rightPadding, topPadding + bottomPadding); 183 // As IntRect is left inclusive and right exclusive (seeing IntRect::contains(x, y)), adding "1". 184 // FIXME: Remove this once non-rect based hit-detection stops using IntRect:intersects. 185 actualPadding += IntSize(1, 1); 186 187 return IntRect(actualPoint, actualPadding); 188} 189 190} // namespace WebCore 191