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/*
* 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 "config.h"
#include "SVGResourcesCache.h"
#if ENABLE(SVG)
#include "RenderSVGResourceContainer.h"
#include "SVGDocumentExtensions.h"
#include "SVGResources.h"
#include "SVGResourcesCycleSolver.h"
namespace WebCore {
SVGResourcesCache::SVGResourcesCache()
{
}
SVGResourcesCache::~SVGResourcesCache()
{
deleteAllValues(m_cache);
}
void SVGResourcesCache::addResourcesFromRenderObject(RenderObject* object, const RenderStyle* style)
{
ASSERT(object);
ASSERT(style);
ASSERT(!m_cache.contains(object));
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
// Build a list of all resources associated with the passed RenderObject
SVGResources* resources = new SVGResources;
if (!resources->buildCachedResources(object, svgStyle)) {
delete resources;
return;
}
// Put object in cache.
m_cache.set(object, resources);
// Run cycle-detection _afterwards_, so self-references can be caught as well.
SVGResourcesCycleSolver solver(object, resources);
solver.resolveCycles();
// Walk resources and register the render object at each resources.
HashSet<RenderSVGResourceContainer*> resourceSet;
resources->buildSetOfResources(resourceSet);
HashSet<RenderSVGResourceContainer*>::iterator end = resourceSet.end();
for (HashSet<RenderSVGResourceContainer*>::iterator it = resourceSet.begin(); it != end; ++it)
(*it)->addClient(object);
}
void SVGResourcesCache::removeResourcesFromRenderObject(RenderObject* object)
{
if (!m_cache.contains(object))
return;
SVGResources* resources = m_cache.get(object);
// Walk resources and register the render object at each resources.
HashSet<RenderSVGResourceContainer*> resourceSet;
resources->buildSetOfResources(resourceSet);
HashSet<RenderSVGResourceContainer*>::iterator end = resourceSet.end();
for (HashSet<RenderSVGResourceContainer*>::iterator it = resourceSet.begin(); it != end; ++it)
(*it)->removeClient(object);
delete m_cache.take(object);
}
static inline SVGResourcesCache* resourcesCacheFromRenderObject(RenderObject* renderer)
{
Document* document = renderer->document();
ASSERT(document);
SVGDocumentExtensions* extensions = document->accessSVGExtensions();
ASSERT(extensions);
SVGResourcesCache* cache = extensions->resourcesCache();
ASSERT(cache);
return cache;
}
SVGResources* SVGResourcesCache::cachedResourcesForRenderObject(RenderObject* renderer)
{
ASSERT(renderer);
SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
if (!cache->m_cache.contains(renderer))
return 0;
return cache->m_cache.get(renderer);
}
void SVGResourcesCache::clientLayoutChanged(RenderObject* object)
{
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
if (!resources)
return;
resources->removeClientFromCache(object);
}
void SVGResourcesCache::clientStyleChanged(RenderObject* renderer, StyleDifference diff, const RenderStyle* newStyle)
{
ASSERT(renderer);
if (diff == StyleDifferenceEqual)
return;
// In this case the proper SVGFE*Element will imply whether the modifided CSS properties implies a relayout or repaint.
if (renderer->isSVGResourceFilterPrimitive() && diff == StyleDifferenceRepaint)
return;
clientUpdatedFromElement(renderer, newStyle);
RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer, false);
}
void SVGResourcesCache::clientUpdatedFromElement(RenderObject* renderer, const RenderStyle* newStyle)
{
ASSERT(renderer);
ASSERT(renderer->parent());
SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
cache->removeResourcesFromRenderObject(renderer);
cache->addResourcesFromRenderObject(renderer, newStyle);
}
void SVGResourcesCache::clientDestroyed(RenderObject* renderer)
{
ASSERT(renderer);
SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
cache->removeResourcesFromRenderObject(renderer);
}
void SVGResourcesCache::resourceDestroyed(RenderSVGResourceContainer* resource)
{
ASSERT(resource);
SVGResourcesCache* cache = resourcesCacheFromRenderObject(resource);
// The resource itself may have clients, that need to be notified.
cache->removeResourcesFromRenderObject(resource);
HashMap<RenderObject*, SVGResources*>::iterator end = cache->m_cache.end();
for (HashMap<RenderObject*, SVGResources*>::iterator it = cache->m_cache.begin(); it != end; ++it)
it->second->resourceDestroyed(resource);
}
}
#endif
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