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/LayoutRepainter.h" 31 #include "core/rendering/RenderView.h" 32 #include "core/rendering/svg/SVGRenderSupport.h" 33 #include "core/rendering/svg/SVGRenderingContext.h" 34 #include "core/rendering/svg/SVGResources.h" 35 #include "core/rendering/svg/SVGResourcesCache.h" 36 #include "platform/graphics/GraphicsContextCullSaver.h" 37 #include "platform/graphics/GraphicsContextStateSaver.h" 38 39 namespace WebCore { 40 41 RenderSVGContainer::RenderSVGContainer(SVGElement* node) 42 : RenderSVGModelObject(node) 43 , m_objectBoundingBoxValid(false) 44 , m_needsBoundariesUpdate(true) 45 { 46 } 47 48 RenderSVGContainer::~RenderSVGContainer() 49 { 50 } 51 52 void RenderSVGContainer::layout() 53 { 54 ASSERT(needsLayout()); 55 56 // RenderSVGRoot disables layoutState for the SVG rendering tree. 57 ASSERT(!view()->layoutStateCachedOffsetsEnabled()); 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 90 void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild) 91 { 92 RenderSVGModelObject::addChild(child, beforeChild); 93 SVGResourcesCache::clientWasAddedToTree(child, child->style()); 94 } 95 96 void RenderSVGContainer::removeChild(RenderObject* child) 97 { 98 SVGResourcesCache::clientWillBeRemovedFromTree(child); 99 RenderSVGModelObject::removeChild(child); 100 } 101 102 103 bool RenderSVGContainer::selfWillPaint() 104 { 105 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this); 106 return resources && resources->filter(); 107 } 108 109 void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint&) 110 { 111 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this); 112 113 if (paintInfo.context->paintingDisabled()) 114 return; 115 116 // Spec: groups w/o children still may render filter content. 117 if (!firstChild() && !selfWillPaint()) 118 return; 119 120 FloatRect repaintRect = paintInvalidationRectInLocalCoordinates(); 121 if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(repaintRect, localToParentTransform(), paintInfo)) 122 return; 123 124 PaintInfo childPaintInfo(paintInfo); 125 { 126 GraphicsContextStateSaver stateSaver(*childPaintInfo.context); 127 128 // Let the RenderSVGViewportContainer subclass clip if necessary 129 applyViewportClip(childPaintInfo); 130 131 childPaintInfo.applyTransform(localToParentTransform()); 132 133 SVGRenderingContext renderingContext; 134 GraphicsContextCullSaver cullSaver(*childPaintInfo.context); 135 bool continueRendering = true; 136 if (childPaintInfo.phase == PaintPhaseForeground) { 137 renderingContext.prepareToRenderSVGContent(this, childPaintInfo); 138 continueRendering = renderingContext.isRenderingPrepared(); 139 140 if (continueRendering && document().settings()->containerCullingEnabled()) 141 cullSaver.cull(paintInvalidationRectInLocalCoordinates()); 142 } 143 144 if (continueRendering) { 145 childPaintInfo.updatePaintingRootForChildren(this); 146 for (RenderObject* child = firstChild(); child; child = child->nextSibling()) 147 child->paint(childPaintInfo, IntPoint()); 148 } 149 } 150 151 // FIXME: This really should be drawn from local coordinates, but currently we hack it 152 // to avoid our clip killing our outline rect. Thus we translate our 153 // outline rect into parent coords before drawing. 154 // FIXME: This means our focus ring won't share our rotation like it should. 155 // We should instead disable our clip during PaintPhaseOutline 156 if (paintInfo.phase == PaintPhaseForeground && style()->outlineWidth() && style()->visibility() == VISIBLE) { 157 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRect)); 158 paintOutline(paintInfo, paintRectInParent); 159 } 160 } 161 162 // addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call 163 void RenderSVGContainer::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*) 164 { 165 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(paintInvalidationRectInLocalCoordinates())); 166 if (!paintRectInParent.isEmpty()) 167 rects.append(paintRectInParent); 168 } 169 170 void RenderSVGContainer::updateCachedBoundaries() 171 { 172 SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_repaintBoundingBox); 173 SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox); 174 } 175 176 bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction) 177 { 178 // Give RenderSVGViewportContainer a chance to apply its viewport clip 179 if (!pointIsInsideViewportClip(pointInParent)) 180 return false; 181 182 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent); 183 184 if (!SVGRenderSupport::pointInClippingArea(this, localPoint)) 185 return false; 186 187 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) { 188 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) { 189 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 190 return true; 191 } 192 } 193 194 // pointer-events=boundingBox makes it possible for containers to be direct targets 195 if (style()->pointerEvents() == PE_BOUNDINGBOX) { 196 ASSERT(isObjectBoundingBoxValid()); 197 if (objectBoundingBox().contains(localPoint)) { 198 updateHitTestResult(result, roundedLayoutPoint(localPoint)); 199 return true; 200 } 201 } 202 // 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." 203 return false; 204 } 205 206 } 207