| // 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 "config.h" |
| |
| #include "TreeSynchronizer.h" |
| |
| #include "CCLayerImpl.h" |
| #include "CCScrollbarAnimationController.h" |
| #include "CCScrollbarLayerImpl.h" |
| #include "LayerChromium.h" |
| #include "ScrollbarLayerChromium.h" |
| #include <wtf/RefPtr.h> |
| |
| namespace cc { |
| |
| PassOwnPtr<CCLayerImpl> TreeSynchronizer::synchronizeTrees(LayerChromium* layerChromiumRoot, PassOwnPtr<CCLayerImpl> oldCCLayerImplRoot, CCLayerTreeHostImpl* hostImpl) |
| { |
| OwnPtrCCLayerImplMap oldLayers; |
| RawPtrCCLayerImplMap newLayers; |
| |
| collectExistingCCLayerImplRecursive(oldLayers, oldCCLayerImplRoot); |
| |
| OwnPtr<CCLayerImpl> newTree = synchronizeTreeRecursive(newLayers, oldLayers, layerChromiumRoot, hostImpl); |
| |
| updateScrollbarLayerPointersRecursive(newLayers, layerChromiumRoot); |
| |
| return newTree.release(); |
| } |
| |
| void TreeSynchronizer::collectExistingCCLayerImplRecursive(OwnPtrCCLayerImplMap& oldLayers, PassOwnPtr<CCLayerImpl> popCCLayerImpl) |
| { |
| OwnPtr<CCLayerImpl> ccLayerImpl = popCCLayerImpl; |
| |
| if (!ccLayerImpl) |
| return; |
| |
| OwnPtrVector<CCLayerImpl>& children = ccLayerImpl->m_children; |
| for (size_t i = 0; i < children.size(); ++i) |
| collectExistingCCLayerImplRecursive(oldLayers, children.take(i)); |
| |
| 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, CCLayerTreeHostImpl* hostImpl) |
| { |
| 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(), hostImpl)); |
| |
| ccLayerImpl->setMaskLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->maskLayer(), hostImpl)); |
| ccLayerImpl->setReplicaLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->replicaLayer(), hostImpl)); |
| |
| layer->pushPropertiesTo(ccLayerImpl.get()); |
| ccLayerImpl->setLayerTreeHostImpl(hostImpl); |
| |
| // Remove all dangling pointers. The pointers will be setup later in updateScrollbarLayerPointersRecursive phase |
| if (CCScrollbarAnimationController* scrollbarController = ccLayerImpl->scrollbarAnimationController()) { |
| scrollbarController->setHorizontalScrollbarLayer(0); |
| scrollbarController->setVerticalScrollbarLayer(0); |
| } |
| |
| 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); |
| CCLayerImpl* ccScrollLayerImpl = newLayers.get(scrollbarLayer->scrollLayerId()); |
| ASSERT(ccScrollLayerImpl); |
| |
| if (ccScrollbarLayerImpl->orientation() == WebKit::WebScrollbar::Horizontal) |
| ccScrollLayerImpl->setHorizontalScrollbarLayer(ccScrollbarLayerImpl); |
| else |
| ccScrollLayerImpl->setVerticalScrollbarLayer(ccScrollbarLayerImpl); |
| } |
| |
| } // namespace cc |