| /* |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "core/layout/svg/SVGResourcesCache.h" |
| |
| #include "core/HTMLNames.h" |
| #include "core/layout/svg/LayoutSVGResourceContainer.h" |
| #include "core/layout/svg/SVGResources.h" |
| #include "core/layout/svg/SVGResourcesCycleSolver.h" |
| #include "core/svg/SVGDocumentExtensions.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| SVGResourcesCache::SVGResourcesCache() |
| { |
| } |
| |
| SVGResourcesCache::~SVGResourcesCache() |
| { |
| } |
| |
| void SVGResourcesCache::addResourcesFromLayoutObject(LayoutObject* object, const ComputedStyle& style) |
| { |
| ASSERT(object); |
| ASSERT(!m_cache.contains(object)); |
| |
| // Build a list of all resources associated with the passed LayoutObject. |
| std::unique_ptr<SVGResources> newResources = SVGResources::buildResources(object, style); |
| if (!newResources) |
| return; |
| |
| // Put object in cache. |
| SVGResources* resources = m_cache.set(object, std::move(newResources)).storedValue->value.get(); |
| |
| // Run cycle-detection _afterwards_, so self-references can be caught as well. |
| SVGResourcesCycleSolver solver(object, resources); |
| solver.resolveCycles(); |
| |
| // Walk resources and register the layout object as a client of each resource. |
| HashSet<LayoutSVGResourceContainer*> resourceSet; |
| resources->buildSetOfResources(resourceSet); |
| |
| for (auto* resourceContainer : resourceSet) |
| resourceContainer->addClient(object); |
| } |
| |
| void SVGResourcesCache::removeResourcesFromLayoutObject(LayoutObject* object) |
| { |
| std::unique_ptr<SVGResources> resources = m_cache.take(object); |
| if (!resources) |
| return; |
| |
| // Walk resources and unregister the layout object as a client of each resource. |
| HashSet<LayoutSVGResourceContainer*> resourceSet; |
| resources->buildSetOfResources(resourceSet); |
| |
| for (auto* resourceContainer : resourceSet) |
| resourceContainer->removeClient(object); |
| } |
| |
| static inline SVGResourcesCache& resourcesCache(Document& document) |
| { |
| return document.accessSVGExtensions().resourcesCache(); |
| } |
| |
| SVGResources* SVGResourcesCache::cachedResourcesForLayoutObject(const LayoutObject* layoutObject) |
| { |
| ASSERT(layoutObject); |
| return resourcesCache(layoutObject->document()).m_cache.get(layoutObject); |
| } |
| |
| void SVGResourcesCache::clientLayoutChanged(LayoutObject* object) |
| { |
| SVGResources* resources = cachedResourcesForLayoutObject(object); |
| if (!resources) |
| return; |
| |
| // Invalidate the resources if either the LayoutObject itself changed, |
| // or we have filter resources, which could depend on the layout of children. |
| if (object->selfNeedsLayout() || resources->filter()) |
| resources->removeClientFromCache(object); |
| } |
| |
| static inline bool layoutObjectCanHaveResources(LayoutObject* layoutObject) |
| { |
| ASSERT(layoutObject); |
| return layoutObject->node() && layoutObject->node()->isSVGElement() && !layoutObject->isSVGInlineText(); |
| } |
| |
| void SVGResourcesCache::clientStyleChanged(LayoutObject* layoutObject, StyleDifference diff, const ComputedStyle& newStyle) |
| { |
| ASSERT(layoutObject); |
| ASSERT(layoutObject->node()); |
| ASSERT(layoutObject->node()->isSVGElement()); |
| |
| if (!diff.hasDifference() || !layoutObject->parent()) |
| return; |
| |
| // In this case the proper SVGFE*Element will decide whether the modified CSS properties require |
| // a relayout or paintInvalidation. |
| if (layoutObject->isSVGResourceFilterPrimitive() && !diff.needsLayout()) |
| return; |
| |
| // Dynamic changes of CSS properties like 'clip-path' may require us to recompute the associated |
| // resources for a LayoutObject. |
| // TODO(fs): Avoid passing in a useless StyleDifference, but instead compare oldStyle/newStyle |
| // to see which resources changed to be able to selectively rebuild individual resources, |
| // instead of all of them. |
| if (layoutObjectCanHaveResources(layoutObject)) { |
| SVGResourcesCache& cache = resourcesCache(layoutObject->document()); |
| cache.removeResourcesFromLayoutObject(layoutObject); |
| cache.addResourcesFromLayoutObject(layoutObject, newStyle); |
| } |
| |
| LayoutSVGResourceContainer::markForLayoutAndParentResourceInvalidation(layoutObject, false); |
| } |
| |
| void SVGResourcesCache::clientWasAddedToTree(LayoutObject* layoutObject, const ComputedStyle& newStyle) |
| { |
| if (!layoutObject->node()) |
| return; |
| LayoutSVGResourceContainer::markForLayoutAndParentResourceInvalidation(layoutObject, false); |
| |
| if (!layoutObjectCanHaveResources(layoutObject)) |
| return; |
| SVGResourcesCache& cache = resourcesCache(layoutObject->document()); |
| cache.addResourcesFromLayoutObject(layoutObject, newStyle); |
| } |
| |
| void SVGResourcesCache::clientWillBeRemovedFromTree(LayoutObject* layoutObject) |
| { |
| if (!layoutObject->node()) |
| return; |
| LayoutSVGResourceContainer::markForLayoutAndParentResourceInvalidation(layoutObject, false); |
| |
| if (!layoutObjectCanHaveResources(layoutObject)) |
| return; |
| SVGResourcesCache& cache = resourcesCache(layoutObject->document()); |
| cache.removeResourcesFromLayoutObject(layoutObject); |
| } |
| |
| void SVGResourcesCache::clientDestroyed(LayoutObject* layoutObject) |
| { |
| ASSERT(layoutObject); |
| |
| SVGResources* resources = cachedResourcesForLayoutObject(layoutObject); |
| if (resources) |
| resources->removeClientFromCache(layoutObject); |
| SVGResourcesCache& cache = resourcesCache(layoutObject->document()); |
| cache.removeResourcesFromLayoutObject(layoutObject); |
| } |
| |
| } // namespace blink |