1 /* 2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis (at) kde.org> 4 * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org> 5 * Copyright (C) 2009 Google, Inc. All rights reserved. 6 * Copyright (C) 2009 Dirk Schulze <krit (at) 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/frame/Settings.h" 29 #include "core/rendering/GraphicsContextAnnotator.h" 30 #include "core/rendering/RenderView.h" 31 #include "core/rendering/svg/SVGRenderSupport.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/GraphicsContextCullSaver.h" 36 #include "platform/graphics/GraphicsContextStateSaver.h" 37 38 namespace blink { 39 40 RenderSVGContainer::RenderSVGContainer(SVGElement* node) 41 : RenderSVGModelObject(node) 42 , m_objectBoundingBoxValid(false) 43 , m_needsBoundariesUpdate(true) 44 { 45 } 46 47 RenderSVGContainer::~RenderSVGContainer() 48 { 49 } 50 51 void RenderSVGContainer::trace(Visitor* visitor) 52 { 53 visitor->trace(m_children); 54 RenderSVGModelObject::trace(visitor); 55 } 56 57 void RenderSVGContainer::layout() 58 { 59 ASSERT(needsLayout()); 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 if (m_needsBoundariesUpdate || updatedTransform) { 77 updateCachedBoundaries(); 78 m_needsBoundariesUpdate = false; 79 80 // If our bounds changed, notify the parents. 81 RenderSVGModelObject::setNeedsBoundariesUpdate(); 82 } 83 84 clearNeedsLayout(); 85 } 86 87 void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild) 88 { 89 RenderSVGModelObject::addChild(child, beforeChild); 90 SVGResourcesCache::clientWasAddedToTree(child, child->style()); 91 } 92 93 void RenderSVGContainer::removeChild(RenderObject* child) 94 { 95 SVGResourcesCache::clientWillBeRemovedFromTree(child); 96 RenderSVGModelObject::removeChild(child); 97 } 98 99 100 bool RenderSVGContainer::selfWillPaint() 101 { 102 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this); 103 return resources && resources->filter(); 104 } 105 106 void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint&) 107 { 108 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this); 109 110 // Spec: groups w/o children still may render filter content. 111 if (!firstChild() && !selfWillPaint()) 112 return; 113 114 FloatRect paintInvalidationRect = paintInvalidationRectInLocalCoordinates(); 115 if (!SVGRenderSupport::paintInfoIntersectsPaintInvalidationRect(paintInvalidationRect, localToParentTransform(), paintInfo)) 116 return; 117 118 PaintInfo childPaintInfo(paintInfo); 119 { 120 GraphicsContextStateSaver stateSaver(*childPaintInfo.context); 121 122 // Let the RenderSVGViewportContainer subclass clip if necessary 123 applyViewportClip(childPaintInfo); 124 125 childPaintInfo.applyTransform(localToParentTransform()); 126 127 SVGRenderingContext renderingContext; 128 GraphicsContextCullSaver cullSaver(*childPaintInfo.context); 129 bool continueRendering = true; 130 if (childPaintInfo.phase == PaintPhaseForeground) { 131 renderingContext.prepareToRenderSVGContent(this, childPaintInfo); 132 continueRendering = renderingContext.isRenderingPrepared(); 133 134 if (continueRendering && document().settings()->containerCullingEnabled()) 135 cullSaver.cull(paintInvalidationRectInLocalCoordinates()); 136 } 137 138 if (continueRendering) { 139 childPaintInfo.updatePaintingRootForChildren(this); 140 for (RenderObject* child = firstChild(); child; child = child->nextSibling()) 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 == PaintPhaseForeground && style()->outlineWidth() && style()->visibility() == VISIBLE) { 151 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(paintInvalidationRect)); 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 157 void RenderSVGContainer::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint&, const RenderLayerModelObject*) const 158 { 159 LayoutRect paintRectInParent = LayoutRect(localToParentTransform().mapRect(paintInvalidationRectInLocalCoordinates())); 160 if (!paintRectInParent.isEmpty()) 161 rects.append(paintRectInParent); 162 } 163 164 void RenderSVGContainer::updateCachedBoundaries() 165 { 166 SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_paintInvalidationBoundingBox); 167 SVGRenderSupport::intersectPaintInvalidationRectWithResources(this, m_paintInvalidationBoundingBox); 168 } 169 170 bool 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; 177 if (!SVGRenderSupport::transformToUserSpaceAndCheckClipping(this, localToParentTransform(), pointInParent, localPoint)) 178 return false; 179 180 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) { 181 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) { 182 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 183 return true; 184 } 185 } 186 187 // pointer-events=boundingBox makes it possible for containers to be direct targets 188 if (style()->pointerEvents() == PE_BOUNDINGBOX) { 189 ASSERT(isObjectBoundingBoxValid()); 190 if (objectBoundingBox().contains(localPoint)) { 191 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 192 return true; 193 } 194 } 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