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#pragma once
27
28#if ENABLE(ASYNC_SCROLLING)
29
30#include "ScrollingConstraints.h"
31#include "ScrollingStateNode.h"
32
33#include <wtf/Forward.h>
34
35namespace WebCore {
36
37class StickyPositionViewportConstraints;
38
39class ScrollingStateStickyNode final : public ScrollingStateNode {
40public:
41 static Ref<ScrollingStateStickyNode> create(ScrollingStateTree&, ScrollingNodeID);
42
43 Ref<ScrollingStateNode> clone(ScrollingStateTree&) override;
44
45 virtual ~ScrollingStateStickyNode();
46
47 enum {
48 ViewportConstraints = NumStateNodeBits
49 };
50
51 WEBCORE_EXPORT void updateConstraints(const StickyPositionViewportConstraints&);
52 const StickyPositionViewportConstraints& viewportConstraints() const { return m_constraints; }
53
54private:
55 ScrollingStateStickyNode(ScrollingStateTree&, ScrollingNodeID);
56 ScrollingStateStickyNode(const ScrollingStateStickyNode&, ScrollingStateTree&);
57
58 void setAllPropertiesChanged() override;
59
60 void reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction) override;
61
62 void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override;
63
64 StickyPositionViewportConstraints m_constraints;
65};
66
67} // namespace WebCore
68
69SPECIALIZE_TYPE_TRAITS_SCROLLING_STATE_NODE(ScrollingStateStickyNode, isStickyNode())
70
71#endif // ENABLE(ASYNC_SCROLLING)
72