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#ifndef ViewUpdateDispatcher_h
27#define ViewUpdateDispatcher_h
28
29#include "Connection.h"
30
31#include "VisibleContentRectUpdateInfo.h"
32#include <WebCore/PageIdentifier.h>
33#include <wtf/HashMap.h>
34#include <wtf/Lock.h>
35#include <wtf/Ref.h>
36
37namespace WebKit {
38
39class ViewUpdateDispatcher : public IPC::Connection::WorkQueueMessageReceiver {
40public:
41 static Ref<ViewUpdateDispatcher> create();
42 ~ViewUpdateDispatcher();
43
44 void initializeConnection(IPC::Connection*);
45
46private:
47 ViewUpdateDispatcher();
48 // IPC::Connection::WorkQueueMessageReceiver.
49 void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
50
51 void visibleContentRectUpdate(WebCore::PageIdentifier, const VisibleContentRectUpdateInfo&);
52
53 void dispatchVisibleContentRectUpdate();
54
55 struct UpdateData {
56 VisibleContentRectUpdateInfo visibleContentRectUpdateInfo;
57 MonotonicTime oldestTimestamp;
58 };
59
60 Ref<WorkQueue> m_queue;
61 Lock m_dataMutex;
62 HashMap<WebCore::PageIdentifier, UpdateData> m_latestUpdate;
63};
64
65} // namespace WebKit
66
67#endif // ViewportUpdateDispatcher_h
68