Fixed and sticky nodes have no nodeID set
[WebKit-https.git] / Source / WebCore / page / scrolling / ScrollingTreeScrollingNode.cpp
1 /*
2  * Copyright (C) 2012 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 "ScrollingTreeScrollingNode.h"
28
29 #if ENABLE(THREADED_SCROLLING)
30
31 #include "ScrollingStateTree.h"
32
33 namespace WebCore {
34
35 ScrollingTreeScrollingNode::ScrollingTreeScrollingNode(ScrollingTree* scrollingTree, ScrollingNodeID nodeID)
36     : ScrollingTreeNode(scrollingTree, nodeID)
37     , m_frameScaleFactor(1)
38     , m_shouldUpdateScrollLayerPositionOnMainThread(0)
39     , m_horizontalScrollElasticity(ScrollElasticityNone)
40     , m_verticalScrollElasticity(ScrollElasticityNone)
41     , m_hasEnabledHorizontalScrollbar(false)
42     , m_hasEnabledVerticalScrollbar(false)
43     , m_horizontalScrollbarMode(ScrollbarAuto)
44     , m_verticalScrollbarMode(ScrollbarAuto)
45 {
46 }
47
48 ScrollingTreeScrollingNode::~ScrollingTreeScrollingNode()
49 {
50 }
51
52 void ScrollingTreeScrollingNode::update(ScrollingStateNode* stateNode)
53 {
54     ScrollingStateScrollingNode* state = toScrollingStateScrollingNode(stateNode);
55
56     if (state->changedProperties() & ScrollingStateScrollingNode::ViewportRect)
57         m_viewportRect = state->viewportRect();
58
59     if (state->changedProperties() & ScrollingStateScrollingNode::ContentsSize)
60         m_contentsSize = state->contentsSize();
61
62     if (state->changedProperties() & ScrollingStateScrollingNode::FrameScaleFactor)
63         m_frameScaleFactor = state->frameScaleFactor();
64
65     if (state->changedProperties() & ScrollingStateScrollingNode::ShouldUpdateScrollLayerPositionOnMainThread)
66         m_shouldUpdateScrollLayerPositionOnMainThread = state->shouldUpdateScrollLayerPositionOnMainThread();
67
68     if (state->changedProperties() & ScrollingStateScrollingNode::HorizontalScrollElasticity)
69         m_horizontalScrollElasticity = state->horizontalScrollElasticity();
70
71     if (state->changedProperties() & ScrollingStateScrollingNode::VerticalScrollElasticity)
72         m_verticalScrollElasticity = state->verticalScrollElasticity();
73
74     if (state->changedProperties() & ScrollingStateScrollingNode::HasEnabledHorizontalScrollbar)
75         m_hasEnabledHorizontalScrollbar = state->hasEnabledHorizontalScrollbar();
76
77     if (state->changedProperties() & ScrollingStateScrollingNode::HasEnabledVerticalScrollbar)
78         m_hasEnabledVerticalScrollbar = state->hasEnabledVerticalScrollbar();
79
80     if (state->changedProperties() & ScrollingStateScrollingNode::HorizontalScrollbarMode)
81         m_horizontalScrollbarMode = state->horizontalScrollbarMode();
82
83     if (state->changedProperties() & ScrollingStateScrollingNode::VerticalScrollbarMode)
84         m_verticalScrollbarMode = state->verticalScrollbarMode();
85
86     if (state->changedProperties() & ScrollingStateScrollingNode::ScrollOrigin)
87         m_scrollOrigin = state->scrollOrigin();
88 }
89
90 } // namespace WebCore
91
92 #endif // ENABLE(THREADED_SCROLLING)