| // Copyright 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "cc/tree_synchronizer.h" |
| |
| #include "cc/layer.h" |
| #include "cc/layer_impl.h" |
| #include "cc/scrollbar_animation_controller.h" |
| #include "cc/scrollbar_layer.h" |
| #include "cc/scrollbar_layer_impl.h" |
| |
| namespace cc { |
| |
| scoped_ptr<LayerImpl> TreeSynchronizer::synchronizeTrees(Layer* layerRoot, scoped_ptr<LayerImpl> oldLayerImplRoot, LayerTreeHostImpl* hostImpl) |
| { |
| ScopedPtrLayerImplMap oldLayers; |
| RawPtrLayerImplMap newLayers; |
| |
| collectExistingLayerImplRecursive(oldLayers, oldLayerImplRoot.Pass()); |
| |
| scoped_ptr<LayerImpl> newTree = synchronizeTreeRecursive(newLayers, oldLayers, layerRoot, hostImpl); |
| |
| updateScrollbarLayerPointersRecursive(newLayers, layerRoot); |
| |
| return newTree.Pass(); |
| } |
| |
| void TreeSynchronizer::collectExistingLayerImplRecursive(ScopedPtrLayerImplMap& oldLayers, scoped_ptr<LayerImpl> layerImpl) |
| { |
| if (!layerImpl) |
| return; |
| |
| ScopedPtrVector<LayerImpl>& children = layerImpl->m_children; |
| for (size_t i = 0; i < children.size(); ++i) |
| collectExistingLayerImplRecursive(oldLayers, children.take(i)); |
| |
| collectExistingLayerImplRecursive(oldLayers, layerImpl->m_maskLayer.Pass()); |
| collectExistingLayerImplRecursive(oldLayers, layerImpl->m_replicaLayer.Pass()); |
| |
| int id = layerImpl->id(); |
| oldLayers.set(id, layerImpl.Pass()); |
| } |
| |
| scoped_ptr<LayerImpl> TreeSynchronizer::reuseOrCreateLayerImpl(RawPtrLayerImplMap& newLayers, ScopedPtrLayerImplMap& oldLayers, Layer* layer) |
| { |
| scoped_ptr<LayerImpl> layerImpl = oldLayers.take(layer->id()); |
| |
| if (!layerImpl) |
| layerImpl = layer->createLayerImpl(); |
| |
| newLayers[layer->id()] = layerImpl.get(); |
| return layerImpl.Pass(); |
| } |
| |
| scoped_ptr<LayerImpl> TreeSynchronizer::synchronizeTreeRecursive(RawPtrLayerImplMap& newLayers, ScopedPtrLayerImplMap& oldLayers, Layer* layer, LayerTreeHostImpl* hostImpl) |
| { |
| if (!layer) |
| return scoped_ptr<LayerImpl>(); |
| |
| scoped_ptr<LayerImpl> layerImpl = reuseOrCreateLayerImpl(newLayers, oldLayers, layer); |
| |
| layerImpl->clearChildList(); |
| const std::vector<scoped_refptr<Layer> >& children = layer->children(); |
| for (size_t i = 0; i < children.size(); ++i) |
| layerImpl->addChild(synchronizeTreeRecursive(newLayers, oldLayers, children[i].get(), hostImpl)); |
| |
| layerImpl->setMaskLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->maskLayer(), hostImpl)); |
| layerImpl->setReplicaLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->replicaLayer(), hostImpl)); |
| |
| layer->pushPropertiesTo(layerImpl.get()); |
| layerImpl->setLayerTreeHostImpl(hostImpl); |
| |
| // Remove all dangling pointers. The pointers will be setup later in updateScrollbarLayerPointersRecursive phase |
| if (ScrollbarAnimationController* scrollbarController = layerImpl->scrollbarAnimationController()) { |
| scrollbarController->setHorizontalScrollbarLayer(0); |
| scrollbarController->setVerticalScrollbarLayer(0); |
| } |
| |
| return layerImpl.Pass(); |
| } |
| |
| void TreeSynchronizer::updateScrollbarLayerPointersRecursive(const RawPtrLayerImplMap& newLayers, Layer* layer) |
| { |
| if (!layer) |
| return; |
| |
| const std::vector<scoped_refptr<Layer> >& children = layer->children(); |
| for (size_t i = 0; i < children.size(); ++i) |
| updateScrollbarLayerPointersRecursive(newLayers, children[i].get()); |
| |
| ScrollbarLayer* scrollbarLayer = layer->toScrollbarLayer(); |
| if (!scrollbarLayer) |
| return; |
| |
| RawPtrLayerImplMap::const_iterator iter = newLayers.find(scrollbarLayer->id()); |
| ScrollbarLayerImpl* scrollbarLayerImpl = iter != newLayers.end() ? static_cast<ScrollbarLayerImpl*>(iter->second) : NULL; |
| iter = newLayers.find(scrollbarLayer->scrollLayerId()); |
| LayerImpl* scrollLayerImpl = iter != newLayers.end() ? iter->second : NULL; |
| |
| DCHECK(scrollbarLayerImpl); |
| DCHECK(scrollLayerImpl); |
| |
| if (scrollbarLayerImpl->orientation() == WebKit::WebScrollbar::Horizontal) |
| scrollLayerImpl->setHorizontalScrollbarLayer(scrollbarLayerImpl); |
| else |
| scrollLayerImpl->setVerticalScrollbarLayer(scrollbarLayerImpl); |
| } |
| |
| } // namespace cc |