DrawingAreaProxyImpl.h revision ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddb 
1/*
2 * Copyright (C) 2011 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 DrawingAreaProxyImpl_h
27#define DrawingAreaProxyImpl_h
28
29#include "BackingStore.h"
30#include "DrawingAreaProxy.h"
31
32namespace WebKit {
33
34class Region;
35
36class DrawingAreaProxyImpl : public DrawingAreaProxy {
37public:
38    static PassOwnPtr<DrawingAreaProxyImpl> create(WebPageProxy*);
39    virtual ~DrawingAreaProxyImpl();
40
41    void paint(BackingStore::PlatformGraphicsContext, const WebCore::IntRect&, Region& unpaintedRegion);
42
43private:
44    explicit DrawingAreaProxyImpl(WebPageProxy*);
45
46    // DrawingAreaProxy
47    virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
48    virtual void didReceiveSyncMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*, CoreIPC::ArgumentEncoder*);
49    virtual bool paint(const WebCore::IntRect&, PlatformDrawingContext);
50    virtual void sizeDidChange();
51    virtual void visibilityDidChange();
52    virtual void setPageIsVisible(bool);
53    virtual void attachCompositingContext(uint32_t contextID);
54    virtual void detachCompositingContext();
55
56    // CoreIPC message handlers
57    virtual void update(const UpdateInfo&);
58    virtual void didSetSize(const UpdateInfo&);
59
60    void incorporateUpdate(const UpdateInfo&);
61    void sendSetSize();
62
63    // Whether we've sent a SetSize message and are now waiting for a DidSetSize message.
64    // Used to throttle SetSize messages so we don't send them faster than the Web process can handle.
65    bool m_isWaitingForDidSetSize;
66
67    OwnPtr<BackingStore> m_backingStore;
68};
69
70} // namespace WebKit
71
72#endif // DrawingAreaProxyImpl_h
73