1 /* 2 * Copyright (C) 2001 Peter Kelly (pmk (at) post.com) 3 * Copyright (C) 2001 Tobias Anton (anton (at) stud.fbi.fh-darmstadt.de) 4 * Copyright (C) 2006 Samuel Weinig (sam.weinig (at) gmail.com) 5 * Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 */ 22 23 #include "config.h" 24 #include "MouseRelatedEvent.h" 25 26 #include "DOMWindow.h" 27 #include "Document.h" 28 #include "Frame.h" 29 #include "FrameView.h" 30 #include "RenderLayer.h" 31 #include "RenderObject.h" 32 33 namespace WebCore { 34 35 MouseRelatedEvent::MouseRelatedEvent() 36 : m_screenX(0) 37 , m_screenY(0) 38 , m_clientX(0) 39 , m_clientY(0) 40 , m_pageX(0) 41 , m_pageY(0) 42 , m_layerX(0) 43 , m_layerY(0) 44 , m_offsetX(0) 45 , m_offsetY(0) 46 , m_isSimulated(false) 47 , m_hasCachedRelativePosition(false) 48 { 49 } 50 51 static int contentsX(AbstractView* abstractView) 52 { 53 if (!abstractView) 54 return 0; 55 Frame* frame = abstractView->frame(); 56 if (!frame) 57 return 0; 58 FrameView* frameView = frame->view(); 59 if (!frameView) 60 return 0; 61 return frameView->scrollX() / frame->pageZoomFactor(); 62 } 63 64 static int contentsY(AbstractView* abstractView) 65 { 66 if (!abstractView) 67 return 0; 68 Frame* frame = abstractView->frame(); 69 if (!frame) 70 return 0; 71 FrameView* frameView = frame->view(); 72 if (!frameView) 73 return 0; 74 return frameView->scrollY() / frame->pageZoomFactor(); 75 } 76 77 MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtr<AbstractView> abstractView, 78 int detail, int screenX, int screenY, int windowX, int windowY, 79 bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated) 80 : UIEventWithKeyState(eventType, canBubble, cancelable, abstractView, detail, ctrlKey, altKey, shiftKey, metaKey) 81 , m_screenX(screenX) 82 , m_screenY(screenY) 83 , m_clientX(0) 84 , m_clientY(0) 85 , m_pageX(0) 86 , m_pageY(0) 87 , m_isSimulated(isSimulated) 88 { 89 IntPoint adjustedPageLocation; 90 IntPoint scrollPosition; 91 92 Frame* frame = view() ? view()->frame() : 0; 93 if (frame && !isSimulated) { 94 if (FrameView* frameView = frame->view()) { 95 scrollPosition = frameView->scrollPosition(); 96 adjustedPageLocation = frameView->windowToContents(IntPoint(windowX, windowY)); 97 float pageZoom = frame->pageZoomFactor(); 98 if (pageZoom != 1.0f) { 99 // Adjust our pageX and pageY to account for the page zoom. 100 adjustedPageLocation.setX(lroundf(adjustedPageLocation.x() / pageZoom)); 101 adjustedPageLocation.setY(lroundf(adjustedPageLocation.y() / pageZoom)); 102 scrollPosition.setX(scrollPosition.x() / pageZoom); 103 scrollPosition.setY(scrollPosition.y() / pageZoom); 104 } 105 } 106 } 107 108 IntPoint clientLocation(adjustedPageLocation - scrollPosition); 109 m_clientX = clientLocation.x(); 110 m_clientY = clientLocation.y(); 111 m_pageX = adjustedPageLocation.x(); 112 m_pageY = adjustedPageLocation.y(); 113 114 initCoordinates(); 115 } 116 117 void MouseRelatedEvent::initCoordinates() 118 { 119 // Set up initial values for coordinates. 120 // Correct values are computed lazily, see computeRelativePosition. 121 m_layerX = m_pageX; 122 m_layerY = m_pageY; 123 m_offsetX = m_pageX; 124 m_offsetY = m_pageY; 125 126 computePageLocation(); 127 m_hasCachedRelativePosition = false; 128 } 129 130 void MouseRelatedEvent::initCoordinates(int clientX, int clientY) 131 { 132 // Set up initial values for coordinates. 133 // Correct values are computed lazily, see computeRelativePosition. 134 m_clientX = clientX; 135 m_clientY = clientY; 136 m_pageX = clientX + contentsX(view()); 137 m_pageY = clientY + contentsY(view()); 138 m_layerX = m_pageX; 139 m_layerY = m_pageY; 140 m_offsetX = m_pageX; 141 m_offsetY = m_pageY; 142 143 computePageLocation(); 144 m_hasCachedRelativePosition = false; 145 } 146 147 static float pageZoomFactor(const UIEvent* event) 148 { 149 DOMWindow* window = event->view(); 150 if (!window) 151 return 1; 152 Frame* frame = window->frame(); 153 if (!frame) 154 return 1; 155 return frame->pageZoomFactor(); 156 } 157 158 void MouseRelatedEvent::computePageLocation() 159 { 160 float zoomFactor = pageZoomFactor(this); 161 setAbsoluteLocation(roundedIntPoint(FloatPoint(pageX() * zoomFactor, pageY() * zoomFactor))); 162 } 163 164 void MouseRelatedEvent::receivedTarget() 165 { 166 m_hasCachedRelativePosition = false; 167 } 168 169 void MouseRelatedEvent::computeRelativePosition() 170 { 171 Node* targetNode = target() ? target()->toNode() : 0; 172 if (!targetNode) 173 return; 174 175 // Compute coordinates that are based on the target. 176 m_layerX = m_pageX; 177 m_layerY = m_pageY; 178 m_offsetX = m_pageX; 179 m_offsetY = m_pageY; 180 181 // Must have an updated render tree for this math to work correctly. 182 targetNode->document()->updateStyleIfNeeded(); 183 184 // Adjust offsetX/Y to be relative to the target's position. 185 if (!isSimulated()) { 186 if (RenderObject* r = targetNode->renderer()) { 187 FloatPoint localPos = r->absoluteToLocal(absoluteLocation(), false, true); 188 float zoomFactor = pageZoomFactor(this); 189 m_offsetX = lroundf(localPos.x() / zoomFactor); 190 m_offsetY = lroundf(localPos.y() / zoomFactor); 191 } 192 } 193 194 // Adjust layerX/Y to be relative to the layer. 195 // FIXME: We're pretty sure this is the wrong definition of "layer." 196 // Our RenderLayer is a more modern concept, and layerX/Y is some 197 // other notion about groups of elements (left over from the Netscape 4 days?); 198 // we should test and fix this. 199 Node* n = targetNode; 200 while (n && !n->renderer()) 201 n = n->parentNode(); 202 203 RenderLayer* layer; 204 if (n && (layer = n->renderer()->enclosingLayer())) { 205 layer->updateLayerPosition(); 206 for (; layer; layer = layer->parent()) { 207 m_layerX -= layer->x(); 208 m_layerY -= layer->y(); 209 } 210 } 211 212 m_hasCachedRelativePosition = true; 213 } 214 215 int MouseRelatedEvent::layerX() 216 { 217 if (!m_hasCachedRelativePosition) 218 computeRelativePosition(); 219 return m_layerX; 220 } 221 222 int MouseRelatedEvent::layerY() 223 { 224 if (!m_hasCachedRelativePosition) 225 computeRelativePosition(); 226 return m_layerY; 227 } 228 229 int MouseRelatedEvent::offsetX() 230 { 231 if (!m_hasCachedRelativePosition) 232 computeRelativePosition(); 233 return m_offsetX; 234 } 235 236 int MouseRelatedEvent::offsetY() 237 { 238 if (!m_hasCachedRelativePosition) 239 computeRelativePosition(); 240 return m_offsetY; 241 } 242 243 int MouseRelatedEvent::pageX() const 244 { 245 return m_pageX; 246 } 247 248 int MouseRelatedEvent::pageY() const 249 { 250 return m_pageY; 251 } 252 253 int MouseRelatedEvent::x() const 254 { 255 // FIXME: This is not correct. 256 // See Microsoft documentation and <http://www.quirksmode.org/dom/w3c_events.html>. 257 return m_clientX; 258 } 259 260 int MouseRelatedEvent::y() const 261 { 262 // FIXME: This is not correct. 263 // See Microsoft documentation and <http://www.quirksmode.org/dom/w3c_events.html>. 264 return m_clientY; 265 } 266 267 } // namespace WebCore 268
