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 26#include "core/rendering/svg/RenderSVGContainer.h" 27 28#include "core/rendering/GraphicsContextAnnotator.h" 29#include "core/rendering/LayoutRectRecorder.h" 30#include "core/rendering/LayoutRepainter.h" 31#include "core/rendering/RenderView.h" 32#include "core/rendering/svg/SVGRenderingContext.h" 33#include "core/rendering/svg/SVGResources.h" 34#include "core/rendering/svg/SVGResourcesCache.h" 35#include "platform/graphics/GraphicsContextStateSaver.h" 36 37namespace WebCore { 38 39RenderSVGContainer::RenderSVGContainer(SVGElement* node) 40 : RenderSVGModelObject(node) 41 , m_objectBoundingBoxValid(false) 42 , m_needsBoundariesUpdate(true) 43{ 44} 45 46RenderSVGContainer::~RenderSVGContainer() 47{ 48} 49 50void RenderSVGContainer::layout() 51{ 52 ASSERT(needsLayout()); 53 54 // RenderSVGRoot disables layoutState for the SVG rendering tree. 55 ASSERT(!view()->layoutStateEnabled()); 56 57 LayoutRectRecorder recorder(*this); 58 LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) || selfWillPaint()); 59 60 // Allow RenderSVGViewportContainer to update its viewport. 61 calcViewport(); 62 63 // Allow RenderSVGTransformableContainer to update its transform. 64 bool updatedTransform = calculateLocalTransform(); 65 66 // RenderSVGViewportContainer needs to set the 'layout size changed' flag. 67 determineIfLayoutSizeChanged(); 68 69 SVGRenderSupport::layoutChildren(this, selfNeedsLayout() || SVGRenderSupport::filtersForceContainerLayout(this)); 70 71 // Invalidate all resources of this client if our layout changed. 72 if (everHadLayout() && needsLayout()) 73 SVGResourcesCache::clientLayoutChanged(this); 74 75 // At this point LayoutRepainter already grabbed the old bounds, 76 // recalculate them now so repaintAfterLayout() uses the new bounds. 77 if (m_needsBoundariesUpdate || updatedTransform) { 78 updateCachedBoundaries(); 79 m_needsBoundariesUpdate = false; 80 81 // If our bounds changed, notify the parents. 82 RenderSVGModelObject::setNeedsBoundariesUpdate(); 83 } 84 85 repainter.repaintAfterLayout(); 86 clearNeedsLayout(); 87} 88 89void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild) 90{ 91 RenderSVGModelObject::addChild(child, beforeChild); 92 SVGResourcesCache::clientWasAddedToTree(child, child->style()); 93} 94 95void RenderSVGContainer::removeChild(RenderObject* child) 96{ 97 SVGResourcesCache::clientWillBeRemovedFromTree(child); 98 RenderSVGModelObject::removeChild(child); 99} 100 101 102bool RenderSVGContainer::selfWillPaint() 103{ 104 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this); 105 return resources && resources->filter(); 106} 107 108void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint&) 109{ 110 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this); 111 112 if (paintInfo.context->paintingDisabled()) 113 return; 114 115 // Spec: groups w/o children still may render filter content. 116 if (!firstChild() && !selfWillPaint()) 117 return; 118 119 FloatRect repaintRect = repaintRectInLocalCoordinates(); 120 if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(repaintRect, localToParentTransform(), paintInfo)) 121 return; 122 123 PaintInfo childPaintInfo(paintInfo); 124 { 125 GraphicsContextStateSaver stateSaver(*childPaintInfo.context); 126 127 // Let the RenderSVGViewportContainer subclass clip if necessary 128 applyViewportClip(childPaintInfo); 129 130 childPaintInfo.applyTransform(localToParentTransform()); 131 132 SVGRenderingContext renderingContext; 133 bool continueRendering = true; 134 if (childPaintInfo.phase == PaintPhaseForeground) { 135 renderingContext.prepareToRenderSVGContent(this, childPaintInfo); 136 continueRendering = renderingContext.isRenderingPrepared(); 137 } 138 139 if (continueRendering) { 140 childPaintInfo.updatePaintingRootForChildren(this); 141 for (RenderObject* child = firstChild(); child; child = child->nextSibling()) 142 child->paint(childPaintInfo, IntPoint()); 143 } 144 } 145 146 // FIXME: This really should be drawn from local coordinates, but currently we hack it 147 // to avoid our clip killing our outline rect. Thus we translate our 148 // outline rect into parent coords before drawing. 149 // FIXME: This means our focus ring won't share our rotation like it should. 150 // We should instead disable our clip during PaintPhaseOutline 151 if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE) { 152 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRect)); 153 paintOutline(paintInfo, paintRectInParent); 154 } 155} 156 157// addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call 158void RenderSVGContainer::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*) 159{ 160 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRectInLocalCoordinates())); 161 if (!paintRectInParent.isEmpty()) 162 rects.append(paintRectInParent); 163} 164 165void RenderSVGContainer::updateCachedBoundaries() 166{ 167 SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_repaintBoundingBox); 168 SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox); 169} 170 171bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction) 172{ 173 // Give RenderSVGViewportContainer a chance to apply its viewport clip 174 if (!pointIsInsideViewportClip(pointInParent)) 175 return false; 176 177 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent); 178 179 if (!SVGRenderSupport::pointInClippingArea(this, localPoint)) 180 return false; 181 182 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) { 183 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) { 184 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 185 return true; 186 } 187 } 188 189 // pointer-events=boundingBox makes it possible for containers to be direct targets 190 if (style()->pointerEvents() == PE_BOUNDINGBOX) { 191 ASSERT(isObjectBoundingBoxValid()); 192 if (objectBoundingBox().contains(localPoint)) { 193 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 194 return true; 195 } 196 } 197 // 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." 198 return false; 199} 200 201} 202