1/*
2 * Copyright (C) 2010 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 ChunkedUpdateDrawingArea_h
27#define ChunkedUpdateDrawingArea_h
28
29#include "DrawingArea.h"
30#include "RunLoop.h"
31#include <WebCore/IntPoint.h>
32
33namespace WebKit {
34
35class UpdateChunk;
36
37class ChunkedUpdateDrawingArea : public DrawingArea {
38public:
39    explicit ChunkedUpdateDrawingArea(WebPage*);
40    virtual ~ChunkedUpdateDrawingArea();
41
42    virtual void setNeedsDisplay(const WebCore::IntRect&);
43    virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
44    virtual void display();
45    virtual void forceRepaint();
46
47#if USE(ACCELERATED_COMPOSITING)
48    virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) { }
49    virtual void scheduleCompositingLayerSync() { }
50    virtual void syncCompositingLayers() { }
51#endif
52
53    virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
54
55private:
56    void scheduleDisplay();
57
58    // CoreIPC message handlers.
59    void setSize(const WebCore::IntSize& viewSize);
60    void suspendPainting();
61    void deprecatedResumePainting(bool forceRepaint);
62    void didUpdate();
63
64    // Platform overrides
65    void paintIntoUpdateChunk(UpdateChunk*);
66
67    WebCore::IntRect m_dirtyRect;
68    bool m_isWaitingForUpdate;
69    bool m_paintingIsSuspended;
70    RunLoop::Timer<ChunkedUpdateDrawingArea> m_displayTimer;
71};
72
73} // namespace WebKit
74
75#endif // ChunkedUpdateDrawingArea_h
76