1/*
2 * Copyright (C) 2012 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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef WebScrollbarThemeGeometryNative_h
27#define WebScrollbarThemeGeometryNative_h
28
29#include "platform/PlatformExport.h"
30#include "public/platform/WebRect.h"
31#include "public/platform/WebScrollbarThemeGeometry.h"
32#include "wtf/PassOwnPtr.h"
33
34namespace blink {
35
36class ScrollbarTheme;
37class WebScrollbar;
38
39class PLATFORM_EXPORT WebScrollbarThemeGeometryNative : public WebScrollbarThemeGeometry {
40public:
41    static PassOwnPtr<WebScrollbarThemeGeometryNative> create(ScrollbarTheme*);
42
43    // WebScrollbarThemeGeometry overrides
44    virtual WebScrollbarThemeGeometryNative* clone() const OVERRIDE;
45    virtual int thumbPosition(WebScrollbar*) OVERRIDE;
46    virtual int thumbLength(WebScrollbar*) OVERRIDE;
47    virtual int trackPosition(WebScrollbar*) OVERRIDE;
48    virtual int trackLength(WebScrollbar*) OVERRIDE;
49    virtual bool hasButtons(WebScrollbar*) OVERRIDE;
50    virtual bool hasThumb(WebScrollbar*) OVERRIDE;
51    virtual WebRect trackRect(WebScrollbar*) OVERRIDE;
52    virtual WebRect thumbRect(WebScrollbar*) OVERRIDE;
53    virtual int minimumThumbLength(WebScrollbar*) OVERRIDE;
54    virtual int scrollbarThickness(WebScrollbar*) OVERRIDE;
55    virtual WebRect backButtonStartRect(WebScrollbar*) OVERRIDE;
56    virtual WebRect backButtonEndRect(WebScrollbar*) OVERRIDE;
57    virtual WebRect forwardButtonStartRect(WebScrollbar*) OVERRIDE;
58    virtual WebRect forwardButtonEndRect(WebScrollbar*) OVERRIDE;
59    virtual WebRect constrainTrackRectToTrackPieces(WebScrollbar*, const WebRect&) OVERRIDE;
60    virtual void splitTrack(WebScrollbar*, const WebRect& track, WebRect& startTrack, WebRect& thumb, WebRect& endTrack) OVERRIDE;
61
62private:
63    explicit WebScrollbarThemeGeometryNative(ScrollbarTheme*);
64
65    // The theme is not owned by this class. It is assumed that the theme is a
66    // static pointer and its lifetime is essentially infinite. Only thread-safe
67    // functions on the theme can be called by this theme.
68    ScrollbarTheme* m_theme;
69};
70
71} // namespace blink
72
73#endif
74