84d25ef0b951c3a2b283fc9f9984ac5102632a9c
[WebKit-https.git] / Source / WebCore / page / scrolling / ScrollingStateOverflowScrollingNode.cpp
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
34 namespace WebCore {
35
36 Ref<ScrollingStateOverflowScrollingNode> ScrollingStateOverflowScrollingNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
37 {
38     return adoptRef(*new ScrollingStateOverflowScrollingNode(stateTree, nodeID));
39 }
40
41 ScrollingStateOverflowScrollingNode::ScrollingStateOverflowScrollingNode(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
42     : ScrollingStateScrollingNode(stateTree, OverflowScrollingNode, nodeID)
43 {
44 }
45
46 ScrollingStateOverflowScrollingNode::ScrollingStateOverflowScrollingNode(const ScrollingStateOverflowScrollingNode& stateNode, ScrollingStateTree& adoptiveTree)
47     : ScrollingStateScrollingNode(stateNode, adoptiveTree)
48 {
49     if (hasChangedProperty(ScrolledContentsLayer))
50         setScrolledContentsLayer(stateNode.scrolledContentsLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));
51 }
52
53 ScrollingStateOverflowScrollingNode::~ScrollingStateOverflowScrollingNode()
54 {
55 }
56
57 Ref<ScrollingStateNode> ScrollingStateOverflowScrollingNode::clone(ScrollingStateTree& adoptiveTree)
58 {
59     return adoptRef(*new ScrollingStateOverflowScrollingNode(*this, adoptiveTree));
60 }
61     
62 void ScrollingStateOverflowScrollingNode::setScrolledContentsLayer(const LayerRepresentation& layerRepresentation)
63 {
64     if (layerRepresentation == m_scrolledContentsLayer)
65         return;
66     
67     m_scrolledContentsLayer = layerRepresentation;
68     setPropertyChanged(ScrolledContentsLayer);
69 }
70
71 void ScrollingStateOverflowScrollingNode::dumpProperties(TextStream& ts, int indent) const
72 {
73     ts << "(" << "Overflow scrolling node" << "\n";
74     
75     ScrollingStateScrollingNode::dumpProperties(ts, indent);
76     
77     if (m_scrolledContentsLayer.layerID()) {
78         writeIndent(ts, indent + 1);
79         ts << "(scrolled contents layer " << m_scrolledContentsLayer.layerID() << ")\n";
80     }
81 }
82
83 } // namespace WebCore
84
85 #endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)