1 /* 2 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #include "config.h" 21 #include "SVGResourcesCache.h" 22 23 #if ENABLE(SVG) 24 #include "RenderSVGResourceContainer.h" 25 #include "SVGDocumentExtensions.h" 26 #include "SVGResources.h" 27 #include "SVGResourcesCycleSolver.h" 28 29 namespace WebCore { 30 31 SVGResourcesCache::SVGResourcesCache() 32 { 33 } 34 35 SVGResourcesCache::~SVGResourcesCache() 36 { 37 deleteAllValues(m_cache); 38 } 39 40 void SVGResourcesCache::addResourcesFromRenderObject(RenderObject* object, const RenderStyle* style) 41 { 42 ASSERT(object); 43 ASSERT(style); 44 ASSERT(!m_cache.contains(object)); 45 46 const SVGRenderStyle* svgStyle = style->svgStyle(); 47 ASSERT(svgStyle); 48 49 // Build a list of all resources associated with the passed RenderObject 50 SVGResources* resources = new SVGResources; 51 if (!resources->buildCachedResources(object, svgStyle)) { 52 delete resources; 53 return; 54 } 55 56 // Put object in cache. 57 m_cache.set(object, resources); 58 59 // Run cycle-detection _afterwards_, so self-references can be caught as well. 60 SVGResourcesCycleSolver solver(object, resources); 61 solver.resolveCycles(); 62 63 // Walk resources and register the render object at each resources. 64 HashSet<RenderSVGResourceContainer*> resourceSet; 65 resources->buildSetOfResources(resourceSet); 66 67 HashSet<RenderSVGResourceContainer*>::iterator end = resourceSet.end(); 68 for (HashSet<RenderSVGResourceContainer*>::iterator it = resourceSet.begin(); it != end; ++it) 69 (*it)->addClient(object); 70 } 71 72 void SVGResourcesCache::removeResourcesFromRenderObject(RenderObject* object) 73 { 74 if (!m_cache.contains(object)) 75 return; 76 77 SVGResources* resources = m_cache.get(object); 78 79 // Walk resources and register the render object at each resources. 80 HashSet<RenderSVGResourceContainer*> resourceSet; 81 resources->buildSetOfResources(resourceSet); 82 83 HashSet<RenderSVGResourceContainer*>::iterator end = resourceSet.end(); 84 for (HashSet<RenderSVGResourceContainer*>::iterator it = resourceSet.begin(); it != end; ++it) 85 (*it)->removeClient(object); 86 87 delete m_cache.take(object); 88 } 89 90 static inline SVGResourcesCache* resourcesCacheFromRenderObject(RenderObject* renderer) 91 { 92 Document* document = renderer->document(); 93 ASSERT(document); 94 95 SVGDocumentExtensions* extensions = document->accessSVGExtensions(); 96 ASSERT(extensions); 97 98 SVGResourcesCache* cache = extensions->resourcesCache(); 99 ASSERT(cache); 100 101 return cache; 102 } 103 104 SVGResources* SVGResourcesCache::cachedResourcesForRenderObject(RenderObject* renderer) 105 { 106 ASSERT(renderer); 107 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer); 108 if (!cache->m_cache.contains(renderer)) 109 return 0; 110 111 return cache->m_cache.get(renderer); 112 } 113 114 void SVGResourcesCache::clientLayoutChanged(RenderObject* object) 115 { 116 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object); 117 if (!resources) 118 return; 119 120 resources->removeClientFromCache(object); 121 } 122 123 void SVGResourcesCache::clientStyleChanged(RenderObject* renderer, StyleDifference diff, const RenderStyle* newStyle) 124 { 125 ASSERT(renderer); 126 if (diff == StyleDifferenceEqual) 127 return; 128 129 // In this case the proper SVGFE*Element will imply whether the modifided CSS properties implies a relayout or repaint. 130 if (renderer->isSVGResourceFilterPrimitive() && diff == StyleDifferenceRepaint) 131 return; 132 133 clientUpdatedFromElement(renderer, newStyle); 134 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer, false); 135 } 136 137 void SVGResourcesCache::clientUpdatedFromElement(RenderObject* renderer, const RenderStyle* newStyle) 138 { 139 ASSERT(renderer); 140 ASSERT(renderer->parent()); 141 142 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer); 143 cache->removeResourcesFromRenderObject(renderer); 144 cache->addResourcesFromRenderObject(renderer, newStyle); 145 } 146 147 void SVGResourcesCache::clientDestroyed(RenderObject* renderer) 148 { 149 ASSERT(renderer); 150 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer); 151 cache->removeResourcesFromRenderObject(renderer); 152 } 153 154 void SVGResourcesCache::resourceDestroyed(RenderSVGResourceContainer* resource) 155 { 156 ASSERT(resource); 157 SVGResourcesCache* cache = resourcesCacheFromRenderObject(resource); 158 159 // The resource itself may have clients, that need to be notified. 160 cache->removeResourcesFromRenderObject(resource); 161 162 HashMap<RenderObject*, SVGResources*>::iterator end = cache->m_cache.end(); 163 for (HashMap<RenderObject*, SVGResources*>::iterator it = cache->m_cache.begin(); it != end; ++it) 164 it->second->resourceDestroyed(resource); 165 } 166 167 } 168 169 #endif 170
