1/*
2 * Copyright (C) 2010 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef WebThemeEngine_h
32#define WebThemeEngine_h
33
34#include "../WebCanvas.h"
35
36namespace WebKit {
37
38struct WebRect;
39
40class WebThemeEngine {
41public:
42    enum State {
43        StateDisabled,
44        StateInactive,
45        StateActive,
46        StatePressed,
47    };
48
49    enum Size {
50        SizeRegular,
51        SizeSmall,
52    };
53
54    enum ScrollbarOrientation {
55        ScrollbarOrientationHorizontal,
56        ScrollbarOrientationVertical,
57    };
58
59    enum ScrollbarParent {
60        ScrollbarParentScrollView,
61        ScrollbarParentRenderLayer,
62    };
63
64    struct ScrollbarInfo {
65        ScrollbarOrientation orientation;
66        ScrollbarParent parent;
67        int maxValue;
68        int currentValue;
69        int visibleSize;
70        int totalSize;
71    };
72
73    virtual void paintScrollbarThumb(WebCanvas*, State, Size, const WebRect&, const ScrollbarInfo&) { }
74};
75
76} // namespace WebKit
77
78#endif
79