1/* 2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org> 3 * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org> 4 * Copyright (C) 2007 Eric Seidel <eric@webkit.org> 5 * Copyright (C) 2009 Google, Inc. All rights reserved. 6 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public License 19 * along with this library; see the file COPYING.LIB. If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 */ 23 24#include "config.h" 25#include "RenderSVGContainer.h" 26 27#include "GraphicsContext.h" 28#include "HitTestRequest.h" 29#include "LayoutRepainter.h" 30#include "RenderIterator.h" 31#include "RenderSVGResourceFilter.h" 32#include "RenderView.h" 33#include "SVGRenderingContext.h" 34#include "SVGResources.h" 35#include "SVGResourcesCache.h" 36#include <wtf/StackStats.h> 37 38namespace WebCore { 39 40RenderSVGContainer::RenderSVGContainer(SVGElement& element, PassRef<RenderStyle> style) 41 : RenderSVGModelObject(element, WTF::move(style)) 42 , m_objectBoundingBoxValid(false) 43 , m_needsBoundariesUpdate(true) 44{ 45} 46 47RenderSVGContainer::~RenderSVGContainer() 48{ 49} 50 51void RenderSVGContainer::layout() 52{ 53 StackStats::LayoutCheckPoint layoutCheckPoint; 54 ASSERT(needsLayout()); 55 56 // RenderSVGRoot disables layoutState for the SVG rendering tree. 57 ASSERT(!view().layoutStateEnabled()); 58 59 LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(*this) || selfWillPaint()); 60 61 // Allow RenderSVGViewportContainer to update its viewport. 62 calcViewport(); 63 64 // Allow RenderSVGTransformableContainer to update its transform. 65 bool updatedTransform = calculateLocalTransform(); 66 67 // RenderSVGViewportContainer needs to set the 'layout size changed' flag. 68 determineIfLayoutSizeChanged(); 69 70 SVGRenderSupport::layoutChildren(*this, selfNeedsLayout() || SVGRenderSupport::filtersForceContainerLayout(*this)); 71 72 // Invalidate all resources of this client if our layout changed. 73 if (everHadLayout() && needsLayout()) 74 SVGResourcesCache::clientLayoutChanged(*this); 75 76 // At this point LayoutRepainter already grabbed the old bounds, 77 // recalculate them now so repaintAfterLayout() uses the new bounds. 78 if (m_needsBoundariesUpdate || updatedTransform) { 79 updateCachedBoundaries(); 80 m_needsBoundariesUpdate = false; 81 82 // If our bounds changed, notify the parents. 83 RenderSVGModelObject::setNeedsBoundariesUpdate(); 84 } 85 86 repainter.repaintAfterLayout(); 87 clearNeedsLayout(); 88} 89 90void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild) 91{ 92 RenderSVGModelObject::addChild(child, beforeChild); 93 SVGResourcesCache::clientWasAddedToTree(*child); 94} 95 96RenderObject* RenderSVGContainer::removeChild(RenderObject& child) 97{ 98 SVGResourcesCache::clientWillBeRemovedFromTree(child); 99 return RenderSVGModelObject::removeChild(child); 100} 101 102 103bool RenderSVGContainer::selfWillPaint() 104{ 105 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(*this); 106 return resources && resources->filter(); 107} 108 109void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint&) 110{ 111 if (paintInfo.context->paintingDisabled()) 112 return; 113 114 // Spec: groups w/o children still may render filter content. 115 if (!firstChild() && !selfWillPaint()) 116 return; 117 118 FloatRect repaintRect = repaintRectInLocalCoordinates(); 119 if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(repaintRect, localToParentTransform(), paintInfo)) 120 return; 121 122 PaintInfo childPaintInfo(paintInfo); 123 { 124 GraphicsContextStateSaver stateSaver(*childPaintInfo.context); 125 126 // Let the RenderSVGViewportContainer subclass clip if necessary 127 applyViewportClip(childPaintInfo); 128 129 childPaintInfo.applyTransform(localToParentTransform()); 130 131 SVGRenderingContext renderingContext; 132 bool continueRendering = true; 133 if (childPaintInfo.phase == PaintPhaseForeground) { 134 renderingContext.prepareToRenderSVGContent(*this, childPaintInfo); 135 continueRendering = renderingContext.isRenderingPrepared(); 136 } 137 138 if (continueRendering) { 139 childPaintInfo.updateSubtreePaintRootForChildren(this); 140 for (auto& child : childrenOfType<RenderElement>(*this)) 141 child.paint(childPaintInfo, IntPoint()); 142 } 143 } 144 145 // FIXME: This really should be drawn from local coordinates, but currently we hack it 146 // to avoid our clip killing our outline rect. Thus we translate our 147 // outline rect into parent coords before drawing. 148 // FIXME: This means our focus ring won't share our rotation like it should. 149 // We should instead disable our clip during PaintPhaseOutline 150 if (paintInfo.phase == PaintPhaseSelfOutline && style().outlineWidth() && style().visibility() == VISIBLE) { 151 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRect)); 152 paintOutline(paintInfo, paintRectInParent); 153 } 154} 155 156// addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call 157void RenderSVGContainer::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*) 158{ 159 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRectInLocalCoordinates())); 160 if (!paintRectInParent.isEmpty()) 161 rects.append(paintRectInParent); 162} 163 164void RenderSVGContainer::updateCachedBoundaries() 165{ 166 SVGRenderSupport::computeContainerBoundingBoxes(*this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_repaintBoundingBox); 167 SVGRenderSupport::intersectRepaintRectWithResources(*this, m_repaintBoundingBox); 168} 169 170bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction) 171{ 172 // Give RenderSVGViewportContainer a chance to apply its viewport clip 173 if (!pointIsInsideViewportClip(pointInParent)) 174 return false; 175 176 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent); 177 178 if (!SVGRenderSupport::pointInClippingArea(*this, localPoint)) 179 return false; 180 181 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) { 182 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) { 183 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 184 return true; 185 } 186 } 187 188 // Accessibility wants to return SVG containers, if appropriate. 189 if (request.type() & HitTestRequest::AccessibilityHitTest && m_objectBoundingBox.contains(localPoint)) { 190 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 191 return true; 192 } 193 194 // Spec: Only graphical elements can be targeted by the mouse, period. 195 // 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched." 196 return false; 197} 198 199} 200