1/*
2 * Copyright (C) 2013 Google 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 GOOGLE, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27#ifndef OverscrollTheme_h
28#define OverscrollTheme_h
29
30#include "platform/PlatformExport.h"
31#include "platform/graphics/GraphicsLayer.h"
32#include "platform/graphics/Image.h"
33
34namespace blink {
35
36class PLATFORM_EXPORT OverscrollTheme {
37    WTF_MAKE_NONCOPYABLE(OverscrollTheme); WTF_MAKE_FAST_ALLOCATED;
38public:
39    OverscrollTheme();
40    virtual ~OverscrollTheme() { }
41
42    virtual PassRefPtr<Image> getOverhangImage();
43    virtual void setUpOverhangShadowLayer(GraphicsLayer*);
44    virtual void updateOverhangShadowLayer(GraphicsLayer* shadowLayer, GraphicsLayer* rootContentLayer);
45
46    static OverscrollTheme* theme();
47
48private:
49    RefPtr<Image> m_overhangShadow;
50    RefPtr<Image> m_overhangPattern;
51};
52
53}
54
55#endif
56