TreeSynchronizer.cpp [plain text]
#include "config.h"
#include "TreeSynchronizer.h"
#include "LayerChromium.h"
#include "ScrollbarLayerChromium.h"
#include "cc/CCLayerImpl.h"
#include "cc/CCScrollbarLayerImpl.h"
#include <wtf/RefPtr.h>
namespace WebCore {
PassOwnPtr<CCLayerImpl> TreeSynchronizer::synchronizeTrees(LayerChromium* layerChromiumRoot, PassOwnPtr<CCLayerImpl> oldCCLayerImplRoot)
{
OwnPtrCCLayerImplMap oldLayers;
RawPtrCCLayerImplMap newLayers;
collectExistingCCLayerImplRecursive(oldLayers, oldCCLayerImplRoot);
OwnPtr<CCLayerImpl> newTree = synchronizeTreeRecursive(newLayers, oldLayers, layerChromiumRoot);
updateScrollbarLayerPointersRecursive(newLayers, layerChromiumRoot);
return newTree.release();
}
void TreeSynchronizer::collectExistingCCLayerImplRecursive(OwnPtrCCLayerImplMap& oldLayers, PassOwnPtr<CCLayerImpl> popCCLayerImpl)
{
OwnPtr<CCLayerImpl> ccLayerImpl = popCCLayerImpl;
if (!ccLayerImpl)
return;
Vector<OwnPtr<CCLayerImpl> >& children = ccLayerImpl->m_children;
for (size_t i = 0; i < children.size(); ++i)
collectExistingCCLayerImplRecursive(oldLayers, children[i].release());
collectExistingCCLayerImplRecursive(oldLayers, ccLayerImpl->m_maskLayer.release());
collectExistingCCLayerImplRecursive(oldLayers, ccLayerImpl->m_replicaLayer.release());
int id = ccLayerImpl->id();
oldLayers.set(id, ccLayerImpl.release());
}
PassOwnPtr<CCLayerImpl> TreeSynchronizer::reuseOrCreateCCLayerImpl(RawPtrCCLayerImplMap& newLayers, OwnPtrCCLayerImplMap& oldLayers, LayerChromium* layer)
{
OwnPtr<CCLayerImpl> ccLayerImpl = oldLayers.take(layer->id());
if (!ccLayerImpl)
ccLayerImpl = layer->createCCLayerImpl();
newLayers.set(layer->id(), ccLayerImpl.get());
return ccLayerImpl.release();
}
PassOwnPtr<CCLayerImpl> TreeSynchronizer::synchronizeTreeRecursive(RawPtrCCLayerImplMap& newLayers, OwnPtrCCLayerImplMap& oldLayers, LayerChromium* layer)
{
if (!layer)
return nullptr;
OwnPtr<CCLayerImpl> ccLayerImpl = reuseOrCreateCCLayerImpl(newLayers, oldLayers, layer);
ccLayerImpl->clearChildList();
const Vector<RefPtr<LayerChromium> >& children = layer->children();
for (size_t i = 0; i < children.size(); ++i)
ccLayerImpl->addChild(synchronizeTreeRecursive(newLayers, oldLayers, children[i].get()));
ccLayerImpl->setMaskLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->maskLayer()));
ccLayerImpl->setReplicaLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->replicaLayer()));
layer->pushPropertiesTo(ccLayerImpl.get());
return ccLayerImpl.release();
}
void TreeSynchronizer::updateScrollbarLayerPointersRecursive(const RawPtrCCLayerImplMap& newLayers, LayerChromium* layer)
{
if (!layer)
return;
const Vector<RefPtr<LayerChromium> >& children = layer->children();
for (size_t i = 0; i < children.size(); ++i)
updateScrollbarLayerPointersRecursive(newLayers, children[i].get());
ScrollbarLayerChromium* scrollbarLayer = layer->toScrollbarLayerChromium();
if (!scrollbarLayer)
return;
CCScrollbarLayerImpl* ccScrollbarLayerImpl = static_cast<CCScrollbarLayerImpl*>(newLayers.get(scrollbarLayer->id()));
ASSERT(ccScrollbarLayerImpl);
ccScrollbarLayerImpl->setScrollLayer(newLayers.get(scrollbarLayer->scrollLayerId()));
}
}