1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
// 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;
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, 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
|
