1/*
2 * Copyright (C) 2014 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ScrollingStateOverflowScrollingNode.h"
28
29#if ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)
30
31#include "ScrollingStateTree.h"
32#include "TextStream.h"
33#include <wtf/OwnPtr.h>
34
35namespace WebCore {
36
37PassRefPtr<ScrollingStateOverflowScrollingNode> ScrollingStateOverflowScrollingNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
38{
39    return adoptRef(new ScrollingStateOverflowScrollingNode(stateTree, nodeID));
40}
41
42ScrollingStateOverflowScrollingNode::ScrollingStateOverflowScrollingNode(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
43    : ScrollingStateScrollingNode(stateTree, OverflowScrollingNode, nodeID)
44{
45}
46
47ScrollingStateOverflowScrollingNode::ScrollingStateOverflowScrollingNode(const ScrollingStateOverflowScrollingNode& stateNode, ScrollingStateTree& adoptiveTree)
48    : ScrollingStateScrollingNode(stateNode, adoptiveTree)
49{
50    if (hasChangedProperty(ScrolledContentsLayer))
51        setScrolledContentsLayer(stateNode.scrolledContentsLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));
52}
53
54ScrollingStateOverflowScrollingNode::~ScrollingStateOverflowScrollingNode()
55{
56}
57
58PassRefPtr<ScrollingStateNode> ScrollingStateOverflowScrollingNode::clone(ScrollingStateTree& adoptiveTree)
59{
60    return adoptRef(new ScrollingStateOverflowScrollingNode(*this, adoptiveTree));
61}
62
63void ScrollingStateOverflowScrollingNode::setScrolledContentsLayer(const LayerRepresentation& layerRepresentation)
64{
65    if (layerRepresentation == m_scrolledContentsLayer)
66        return;
67
68    m_scrolledContentsLayer = layerRepresentation;
69    setPropertyChanged(ScrolledContentsLayer);
70}
71
72void ScrollingStateOverflowScrollingNode::dumpProperties(TextStream& ts, int indent) const
73{
74    ts << "(" << "Overflow scrolling node" << "\n";
75
76    ScrollingStateScrollingNode::dumpProperties(ts, indent);
77
78    if (m_scrolledContentsLayer.layerID()) {
79        writeIndent(ts, indent + 1);
80        ts << "(scrolled contents layer " << m_scrolledContentsLayer.layerID() << ")\n";
81    }
82}
83
84} // namespace WebCore
85
86#endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)
87