1/*
2 * Copyright (C) 2014-2015 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 "MessageReceiver.h"
31#include <WebCore/AsyncScrollingCoordinator.h>
32#include <WebCore/ScrollTypes.h>
33#include <WebCore/ScrollingConstraints.h>
34#include <WebCore/Timer.h>
35
36namespace IPC {
37class Decoder;
38class Encoder;
39}
40
41namespace WebKit {
42
43class WebPage;
44class RemoteScrollingCoordinatorTransaction;
45
46class RemoteScrollingCoordinator : public WebCore::AsyncScrollingCoordinator, public IPC::MessageReceiver {
47public:
48 static Ref<RemoteScrollingCoordinator> create(WebPage* page)
49 {
50 return adoptRef(*new RemoteScrollingCoordinator(page));
51 }
52
53 void buildTransaction(RemoteScrollingCoordinatorTransaction&);
54
55private:
56 RemoteScrollingCoordinator(WebPage*);
57 virtual ~RemoteScrollingCoordinator();
58
59 bool isRemoteScrollingCoordinator() const override { return true; }
60
61 // ScrollingCoordinator
62 bool coordinatesScrollingForFrameView(const WebCore::FrameView&) const override;
63 void scheduleTreeStateCommit() override;
64
65 bool isRubberBandInProgress() const override;
66 void setScrollPinningBehavior(WebCore::ScrollPinningBehavior) override;
67 bool isScrollSnapInProgress() const override;
68
69 // IPC::MessageReceiver
70 void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
71
72 // Respond to UI process changes.
73 void scrollPositionChangedForNode(WebCore::ScrollingNodeID, const WebCore::FloatPoint& scrollPosition, bool syncLayerPosition);
74 void currentSnapPointIndicesChangedForNode(WebCore::ScrollingNodeID, unsigned horizontal, unsigned vertical);
75
76 WebPage* m_webPage;
77};
78
79} // namespace WebKit
80
81SPECIALIZE_TYPE_TRAITS_SCROLLING_COORDINATOR(WebKit::RemoteScrollingCoordinator, isRemoteScrollingCoordinator());
82
83#endif // ENABLE(ASYNC_SCROLLING)
84