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 DrawingArea_h
27#define DrawingArea_h
28
29#include "DrawingAreaInfo.h"
30#include <WebCore/IntRect.h>
31#include <wtf/Noncopyable.h>
32#include <wtf/PassOwnPtr.h>
33
34namespace CoreIPC {
35    class ArgumentDecoder;
36    class Connection;
37    class MessageID;
38}
39
40namespace WebCore {
41    class GraphicsLayer;
42}
43
44namespace WebKit {
45
46class WebPage;
47struct WebPageCreationParameters;
48
49class DrawingArea {
50    WTF_MAKE_NONCOPYABLE(DrawingArea);
51
52public:
53    static PassOwnPtr<DrawingArea> create(WebPage*, const WebPageCreationParameters&);
54    virtual ~DrawingArea();
55
56#if PLATFORM(MAC) || PLATFORM(WIN)
57    void didReceiveDrawingAreaMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
58#endif
59
60    virtual void setNeedsDisplay(const WebCore::IntRect&) = 0;
61    virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset) = 0;
62
63    // FIXME: These should be pure virtual.
64    virtual void pageBackgroundTransparencyChanged() { }
65    virtual void forceRepaint() { }
66
67    virtual void didInstallPageOverlay() { }
68    virtual void didUninstallPageOverlay() { }
69    virtual void setPageOverlayNeedsDisplay(const WebCore::IntRect&) { }
70
71#if USE(ACCELERATED_COMPOSITING)
72    virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) = 0;
73    virtual void scheduleCompositingLayerSync() = 0;
74    virtual void syncCompositingLayers() = 0;
75#endif
76
77    virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*) = 0;
78
79protected:
80    DrawingArea(DrawingAreaType, WebPage*);
81
82    DrawingAreaType m_type;
83    WebPage* m_webPage;
84
85private:
86    // CoreIPC message handlers.
87    // FIXME: These should be pure virtual.
88    virtual void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, const WebCore::IntSize& size, const WebCore::IntSize& scrollOffset) { }
89    virtual void didUpdate() { }
90    virtual void suspendPainting() { }
91    virtual void resumePainting() { }
92};
93
94} // namespace WebKit
95
96#endif // DrawingArea_h
97