2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
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.
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.
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.
21 #include "core/rendering/svg/SVGResourcesCache.h"
23 #include "core/HTMLNames.h"
24 #include "core/rendering/svg/RenderSVGResourceContainer.h"
25 #include "core/rendering/svg/SVGResources.h"
26 #include "core/rendering/svg/SVGResourcesCycleSolver.h"
27 #include "core/svg/SVGDocumentExtensions.h"
31 SVGResourcesCache::SVGResourcesCache()
35 SVGResourcesCache::~SVGResourcesCache()
39 void SVGResourcesCache::addResourcesFromRenderObject(RenderObject* object, const RenderStyle* style)
43 ASSERT(!m_cache.contains(object));
45 const SVGRenderStyle& svgStyle = style->svgStyle();
47 // Build a list of all resources associated with the passed RenderObject
48 OwnPtr<SVGResources> newResources = SVGResources::buildResources(object, svgStyle);
52 // Put object in cache.
53 SVGResources* resources = m_cache.set(object, newResources.release()).storedValue->value.get();
55 // Run cycle-detection _afterwards_, so self-references can be caught as well.
56 SVGResourcesCycleSolver solver(object, resources);
57 solver.resolveCycles();
59 // Walk resources and register the render object at each resources.
60 HashSet<RenderSVGResourceContainer*> resourceSet;
61 resources->buildSetOfResources(resourceSet);
63 for (auto* resourceContainer : resourceSet)
64 resourceContainer->addClient(object);
67 void SVGResourcesCache::removeResourcesFromRenderObject(RenderObject* object)
69 OwnPtr<SVGResources> resources = m_cache.take(object);
73 // Walk resources and register the render object at each resources.
74 HashSet<RenderSVGResourceContainer*> resourceSet;
75 resources->buildSetOfResources(resourceSet);
77 for (auto* resourceContainer : resourceSet)
78 resourceContainer->removeClient(object);
81 static inline SVGResourcesCache* resourcesCacheFromRenderObject(const RenderObject* renderer)
83 Document& document = renderer->document();
85 SVGDocumentExtensions& extensions = document.accessSVGExtensions();
86 SVGResourcesCache* cache = extensions.resourcesCache();
92 SVGResources* SVGResourcesCache::cachedResourcesForRenderObject(const RenderObject* renderer)
95 return resourcesCacheFromRenderObject(renderer)->m_cache.get(renderer);
98 void SVGResourcesCache::clientLayoutChanged(RenderObject* object)
100 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
104 // Invalidate the resources if either the RenderObject itself changed,
105 // or we have filter resources, which could depend on the layout of children.
106 if (object->selfNeedsLayout() || resources->filter())
107 resources->removeClientFromCache(object);
110 static inline bool rendererCanHaveResources(RenderObject* renderer)
113 return renderer->node() && renderer->node()->isSVGElement() && !renderer->isSVGInlineText();
116 void SVGResourcesCache::clientStyleChanged(RenderObject* renderer, StyleDifference diff, const RenderStyle* newStyle)
119 ASSERT(renderer->node());
120 ASSERT(renderer->node()->isSVGElement());
122 if (!diff.hasDifference() || !renderer->parent())
125 // In this case the proper SVGFE*Element will decide whether the modified CSS properties require a relayout or paintInvalidation.
126 if (renderer->isSVGResourceFilterPrimitive() && !diff.needsLayout())
129 // Dynamic changes of CSS properties like 'clip-path' may require us to recompute the associated resources for a renderer.
130 // FIXME: Avoid passing in a useless StyleDifference, but instead compare oldStyle/newStyle to see which resources changed
131 // to be able to selectively rebuild individual resources, instead of all of them.
132 if (rendererCanHaveResources(renderer)) {
133 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
134 cache->removeResourcesFromRenderObject(renderer);
135 cache->addResourcesFromRenderObject(renderer, newStyle);
138 RenderSVGResourceContainer::markForLayoutAndParentResourceInvalidation(renderer, false);
141 void SVGResourcesCache::clientWasAddedToTree(RenderObject* renderer, const RenderStyle* newStyle)
143 if (!renderer->node())
145 RenderSVGResourceContainer::markForLayoutAndParentResourceInvalidation(renderer, false);
147 if (!rendererCanHaveResources(renderer))
149 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
150 cache->addResourcesFromRenderObject(renderer, newStyle);
153 void SVGResourcesCache::clientWillBeRemovedFromTree(RenderObject* renderer)
155 if (!renderer->node())
157 RenderSVGResourceContainer::markForLayoutAndParentResourceInvalidation(renderer, false);
159 if (!rendererCanHaveResources(renderer))
161 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
162 cache->removeResourcesFromRenderObject(renderer);
165 void SVGResourcesCache::clientDestroyed(RenderObject* renderer)
169 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(renderer);
171 resources->removeClientFromCache(renderer);
173 SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
174 cache->removeResourcesFromRenderObject(renderer);
177 void SVGResourcesCache::resourceDestroyed(RenderSVGResourceContainer* resource)
180 SVGResourcesCache* cache = resourcesCacheFromRenderObject(resource);
182 // The resource itself may have clients, that need to be notified.
183 cache->removeResourcesFromRenderObject(resource);
185 for (auto& objectResources : cache->m_cache) {
186 objectResources.value->resourceDestroyed(resource);
188 // Mark users of destroyed resources as pending resolution based on the id of the old resource.
189 Element* resourceElement = resource->element();
190 Element* clientElement = toElement(objectResources.key->node());
191 SVGDocumentExtensions& extensions = clientElement->document().accessSVGExtensions();
193 extensions.addPendingResource(resourceElement->fastGetAttribute(HTMLNames::idAttr), clientElement);