Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
| 3 | * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de) |
| 4 | * Copyright (C) 2006 Samuel Weinig (sam.weinig@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 "core/dom/MouseRelatedEvent.h" |
| 25 | |
| 26 | #include "core/dom/Document.h" |
| 27 | #include "core/page/DOMWindow.h" |
| 28 | #include "core/page/Frame.h" |
| 29 | #include "core/page/FrameView.h" |
| 30 | #include "core/rendering/RenderLayer.h" |
| 31 | #include "core/rendering/RenderObject.h" |
| 32 | |
| 33 | namespace WebCore { |
| 34 | |
| 35 | MouseRelatedEvent::MouseRelatedEvent() |
| 36 | : m_isSimulated(false) |
| 37 | , m_hasCachedRelativePosition(false) |
| 38 | { |
| 39 | } |
| 40 | |
| 41 | static LayoutSize contentsScrollOffset(AbstractView* abstractView) |
| 42 | { |
| 43 | if (!abstractView) |
| 44 | return LayoutSize(); |
| 45 | Frame* frame = abstractView->frame(); |
| 46 | if (!frame) |
| 47 | return LayoutSize(); |
| 48 | FrameView* frameView = frame->view(); |
| 49 | if (!frameView) |
| 50 | return LayoutSize(); |
| 51 | float scaleFactor = frame->pageZoomFactor(); |
| 52 | return LayoutSize(frameView->scrollX() / scaleFactor, frameView->scrollY() / scaleFactor); |
| 53 | } |
| 54 | |
| 55 | MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtr<AbstractView> abstractView, |
| 56 | int detail, const IntPoint& screenLocation, const IntPoint& windowLocation, |
| 57 | const IntPoint& movementDelta, |
| 58 | bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated) |
| 59 | : UIEventWithKeyState(eventType, canBubble, cancelable, abstractView, detail, ctrlKey, altKey, shiftKey, metaKey) |
| 60 | , m_screenLocation(screenLocation) |
| 61 | , m_movementDelta(movementDelta) |
| 62 | , m_isSimulated(isSimulated) |
| 63 | { |
| 64 | LayoutPoint adjustedPageLocation; |
| 65 | LayoutPoint scrollPosition; |
| 66 | |
| 67 | Frame* frame = view() ? view()->frame() : 0; |
| 68 | if (frame && !isSimulated) { |
| 69 | if (FrameView* frameView = frame->view()) { |
| 70 | scrollPosition = frameView->scrollPosition(); |
| 71 | adjustedPageLocation = frameView->windowToContents(windowLocation); |
| 72 | float scaleFactor = 1 / frame->pageZoomFactor(); |
| 73 | if (scaleFactor != 1.0f) { |
| 74 | adjustedPageLocation.scale(scaleFactor, scaleFactor); |
| 75 | scrollPosition.scale(scaleFactor, scaleFactor); |
| 76 | } |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | m_clientLocation = adjustedPageLocation - toLayoutSize(scrollPosition); |
| 81 | m_pageLocation = adjustedPageLocation; |
| 82 | |
| 83 | initCoordinates(); |
| 84 | } |
| 85 | |
| 86 | void MouseRelatedEvent::initCoordinates() |
| 87 | { |
| 88 | // Set up initial values for coordinates. |
| 89 | // Correct values are computed lazily, see computeRelativePosition. |
| 90 | m_layerLocation = m_pageLocation; |
| 91 | m_offsetLocation = m_pageLocation; |
| 92 | |
| 93 | computePageLocation(); |
| 94 | m_hasCachedRelativePosition = false; |
| 95 | } |
| 96 | |
| 97 | void MouseRelatedEvent::initCoordinates(const LayoutPoint& clientLocation) |
| 98 | { |
| 99 | // Set up initial values for coordinates. |
| 100 | // Correct values are computed lazily, see computeRelativePosition. |
| 101 | m_clientLocation = clientLocation; |
| 102 | m_pageLocation = clientLocation + contentsScrollOffset(view()); |
| 103 | |
| 104 | m_layerLocation = m_pageLocation; |
| 105 | m_offsetLocation = m_pageLocation; |
| 106 | |
| 107 | computePageLocation(); |
| 108 | m_hasCachedRelativePosition = false; |
| 109 | } |
| 110 | |
| 111 | static float pageZoomFactor(const UIEvent* event) |
| 112 | { |
| 113 | DOMWindow* window = event->view(); |
| 114 | if (!window) |
| 115 | return 1; |
| 116 | Frame* frame = window->frame(); |
| 117 | if (!frame) |
| 118 | return 1; |
| 119 | return frame->pageZoomFactor(); |
| 120 | } |
| 121 | |
| 122 | void MouseRelatedEvent::computePageLocation() |
| 123 | { |
| 124 | float scaleFactor = pageZoomFactor(this); |
| 125 | setAbsoluteLocation(roundedLayoutPoint(FloatPoint(pageX() * scaleFactor, pageY() * scaleFactor))); |
| 126 | } |
| 127 | |
| 128 | void MouseRelatedEvent::receivedTarget() |
| 129 | { |
| 130 | m_hasCachedRelativePosition = false; |
| 131 | } |
| 132 | |
| 133 | void MouseRelatedEvent::computeRelativePosition() |
| 134 | { |
| 135 | Node* targetNode = target() ? target()->toNode() : 0; |
| 136 | if (!targetNode) |
| 137 | return; |
| 138 | |
| 139 | // Compute coordinates that are based on the target. |
| 140 | m_layerLocation = m_pageLocation; |
| 141 | m_offsetLocation = m_pageLocation; |
| 142 | |
| 143 | // Must have an updated render tree for this math to work correctly. |
| 144 | targetNode->document()->updateLayoutIgnorePendingStylesheets(); |
| 145 | |
| 146 | // Adjust offsetLocation to be relative to the target's position. |
| 147 | if (RenderObject* r = targetNode->renderer()) { |
| 148 | FloatPoint localPos = r->absoluteToLocal(absoluteLocation(), UseTransforms); |
| 149 | m_offsetLocation = roundedLayoutPoint(localPos); |
| 150 | float scaleFactor = 1 / pageZoomFactor(this); |
| 151 | if (scaleFactor != 1.0f) |
| 152 | m_offsetLocation.scale(scaleFactor, scaleFactor); |
| 153 | } |
| 154 | |
| 155 | // Adjust layerLocation to be relative to the layer. |
| 156 | // FIXME: event.layerX and event.layerY are poorly defined, |
| 157 | // and probably don't always correspond to RenderLayer offsets. |
| 158 | // https://bugs.webkit.org/show_bug.cgi?id=21868 |
| 159 | Node* n = targetNode; |
| 160 | while (n && !n->renderer()) |
| 161 | n = n->parentNode(); |
| 162 | |
| 163 | RenderLayer* layer; |
| 164 | if (n && (layer = n->renderer()->enclosingLayer())) { |
| 165 | for (; layer; layer = layer->parent()) { |
| 166 | m_layerLocation -= toLayoutSize(layer->location()); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | m_hasCachedRelativePosition = true; |
| 171 | } |
| 172 | |
| 173 | int MouseRelatedEvent::layerX() |
| 174 | { |
| 175 | if (!m_hasCachedRelativePosition) |
| 176 | computeRelativePosition(); |
| 177 | return m_layerLocation.x(); |
| 178 | } |
| 179 | |
| 180 | int MouseRelatedEvent::layerY() |
| 181 | { |
| 182 | if (!m_hasCachedRelativePosition) |
| 183 | computeRelativePosition(); |
| 184 | return m_layerLocation.y(); |
| 185 | } |
| 186 | |
| 187 | int MouseRelatedEvent::offsetX() |
| 188 | { |
| 189 | if (!m_hasCachedRelativePosition) |
| 190 | computeRelativePosition(); |
| 191 | return roundToInt(m_offsetLocation.x()); |
| 192 | } |
| 193 | |
| 194 | int MouseRelatedEvent::offsetY() |
| 195 | { |
| 196 | if (!m_hasCachedRelativePosition) |
| 197 | computeRelativePosition(); |
| 198 | return roundToInt(m_offsetLocation.y()); |
| 199 | } |
| 200 | |
| 201 | int MouseRelatedEvent::pageX() const |
| 202 | { |
| 203 | return m_pageLocation.x(); |
| 204 | } |
| 205 | |
| 206 | int MouseRelatedEvent::pageY() const |
| 207 | { |
| 208 | return m_pageLocation.y(); |
| 209 | } |
| 210 | |
| 211 | const LayoutPoint& MouseRelatedEvent::pageLocation() const |
| 212 | { |
| 213 | return m_pageLocation; |
| 214 | } |
| 215 | |
| 216 | int MouseRelatedEvent::x() const |
| 217 | { |
| 218 | // FIXME: This is not correct. |
| 219 | // See Microsoft documentation and <http://www.quirksmode.org/dom/w3c_events.html>. |
| 220 | return m_clientLocation.x(); |
| 221 | } |
| 222 | |
| 223 | int MouseRelatedEvent::y() const |
| 224 | { |
| 225 | // FIXME: This is not correct. |
| 226 | // See Microsoft documentation and <http://www.quirksmode.org/dom/w3c_events.html>. |
| 227 | return m_clientLocation.y(); |
| 228 | } |
| 229 | |
| 230 | } // namespace WebCore |