1 /* 2 * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved. 3 * Copyright (C) 2013 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 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "config.h" 28 #include "platform/Widget.h" 29 30 31 #include "wtf/Assertions.h" 32 33 namespace WebCore { 34 35 Widget::Widget() 36 : m_parent(0) 37 , m_selfVisible(false) 38 , m_parentVisible(false) 39 { 40 } 41 42 Widget::~Widget() 43 { 44 ASSERT(!parent()); 45 } 46 47 void Widget::setParent(Widget* widget) 48 { 49 ASSERT(!widget || !m_parent); 50 if (!widget || !widget->isVisible()) 51 setParentVisible(false); 52 m_parent = widget; 53 if (widget && widget->isVisible()) 54 setParentVisible(true); 55 } 56 57 Widget* Widget::root() const 58 { 59 const Widget* top = this; 60 while (top->parent()) 61 top = top->parent(); 62 if (top->isFrameView()) 63 return const_cast<Widget*>(static_cast<const Widget*>(top)); 64 return 0; 65 } 66 67 IntRect Widget::convertFromRootView(const IntRect& rootRect) const 68 { 69 if (const Widget* parentWidget = parent()) { 70 IntRect parentRect = parentWidget->convertFromRootView(rootRect); 71 return convertFromContainingView(parentRect); 72 } 73 return rootRect; 74 } 75 76 IntRect Widget::convertToRootView(const IntRect& localRect) const 77 { 78 if (const Widget* parentWidget = parent()) { 79 IntRect parentRect = convertToContainingView(localRect); 80 return parentWidget->convertToRootView(parentRect); 81 } 82 return localRect; 83 } 84 85 IntPoint Widget::convertFromRootView(const IntPoint& rootPoint) const 86 { 87 if (const Widget* parentWidget = parent()) { 88 IntPoint parentPoint = parentWidget->convertFromRootView(rootPoint); 89 return convertFromContainingView(parentPoint); 90 } 91 return rootPoint; 92 } 93 94 IntPoint Widget::convertToRootView(const IntPoint& localPoint) const 95 { 96 if (const Widget* parentWidget = parent()) { 97 IntPoint parentPoint = convertToContainingView(localPoint); 98 return parentWidget->convertToRootView(parentPoint); 99 } 100 return localPoint; 101 } 102 103 IntRect Widget::convertFromContainingWindow(const IntRect& windowRect) const 104 { 105 if (const Widget* parentWidget = parent()) { 106 IntRect parentRect = parentWidget->convertFromContainingWindow(windowRect); 107 return convertFromContainingView(parentRect); 108 } 109 return windowRect; 110 } 111 112 IntRect Widget::convertToContainingWindow(const IntRect& localRect) const 113 { 114 if (const Widget* parentWidget = parent()) { 115 IntRect parentRect = convertToContainingView(localRect); 116 return parentWidget->convertToContainingWindow(parentRect); 117 } 118 return localRect; 119 } 120 121 IntPoint Widget::convertFromContainingWindow(const IntPoint& windowPoint) const 122 { 123 if (const Widget* parentWidget = parent()) { 124 IntPoint parentPoint = parentWidget->convertFromContainingWindow(windowPoint); 125 return convertFromContainingView(parentPoint); 126 } 127 return windowPoint; 128 } 129 130 FloatPoint Widget::convertFromContainingWindow(const FloatPoint& windowPoint) const 131 { 132 // Widgets / windows are required to be IntPoint aligned, but we may need to convert 133 // FloatPoint values within them (eg. for event co-ordinates). 134 IntPoint flooredPoint = flooredIntPoint(windowPoint); 135 FloatPoint parentPoint = this->convertFromContainingWindow(flooredPoint); 136 FloatSize windowFraction = windowPoint - flooredPoint; 137 // Use linear interpolation handle any fractional value (eg. for iframes subject to a transform 138 // beyond just a simple translation). 139 // FIXME: Add FloatPoint variants of all co-ordinate space conversion APIs. 140 if (!windowFraction.isEmpty()) { 141 const int kFactor = 1000; 142 IntPoint parentLineEnd = this->convertFromContainingWindow(flooredPoint + roundedIntSize(windowFraction.scaledBy(kFactor))); 143 FloatSize parentFraction = (parentLineEnd - parentPoint).scaledBy(1.0f / kFactor); 144 parentPoint.move(parentFraction); 145 } 146 return parentPoint; 147 } 148 149 IntPoint Widget::convertToContainingWindow(const IntPoint& localPoint) const 150 { 151 if (const Widget* parentWidget = parent()) { 152 IntPoint parentPoint = convertToContainingView(localPoint); 153 return parentWidget->convertToContainingWindow(parentPoint); 154 } 155 return localPoint; 156 } 157 158 IntRect Widget::convertToContainingView(const IntRect& localRect) const 159 { 160 if (const Widget* parentWidget = parent()) { 161 IntRect parentRect(localRect); 162 parentRect.setLocation(parentWidget->convertChildToSelf(this, localRect.location())); 163 return parentRect; 164 } 165 return localRect; 166 } 167 168 IntRect Widget::convertFromContainingView(const IntRect& parentRect) const 169 { 170 if (const Widget* parentWidget = parent()) { 171 IntRect localRect = parentRect; 172 localRect.setLocation(parentWidget->convertSelfToChild(this, localRect.location())); 173 return localRect; 174 } 175 176 return parentRect; 177 } 178 179 IntPoint Widget::convertToContainingView(const IntPoint& localPoint) const 180 { 181 if (const Widget* parentWidget = parent()) 182 return parentWidget->convertChildToSelf(this, localPoint); 183 184 return localPoint; 185 } 186 187 IntPoint Widget::convertFromContainingView(const IntPoint& parentPoint) const 188 { 189 if (const Widget* parentWidget = parent()) 190 return parentWidget->convertSelfToChild(this, parentPoint); 191 192 return parentPoint; 193 } 194 195 IntPoint Widget::convertChildToSelf(const Widget*, const IntPoint& point) const 196 { 197 return point; 198 } 199 200 IntPoint Widget::convertSelfToChild(const Widget*, const IntPoint& point) const 201 { 202 return point; 203 } 204 205 } // namespace WebCore 206
