1/*
2 * Copyright (C) 2008 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. ``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 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#ifndef RenderScrollbarTheme_h
27#define RenderScrollbarTheme_h
28
29#include "ScrollbarThemeComposite.h"
30
31namespace WebCore {
32
33class PlatformMouseEvent;
34class Scrollbar;
35class ScrollView;
36
37class RenderScrollbarTheme : public ScrollbarThemeComposite {
38public:
39    virtual ~RenderScrollbarTheme() {};
40
41    virtual int scrollbarThickness(ScrollbarControlSize controlSize) { return ScrollbarTheme::theme()->scrollbarThickness(controlSize); }
42
43    virtual ScrollbarButtonsPlacement buttonsPlacement() const { return ScrollbarTheme::theme()->buttonsPlacement(); }
44
45    virtual bool supportsControlTints() const { return true; }
46
47    virtual void paintScrollCorner(ScrollView*, GraphicsContext* context, const IntRect& cornerRect);
48
49    virtual bool shouldCenterOnThumb(ScrollbarThemeClient* scrollbar, const PlatformMouseEvent& event) { return ScrollbarTheme::theme()->shouldCenterOnThumb(scrollbar, event); }
50
51    virtual double initialAutoscrollTimerDelay() { return ScrollbarTheme::theme()->initialAutoscrollTimerDelay(); }
52    virtual double autoscrollTimerDelay() { return ScrollbarTheme::theme()->autoscrollTimerDelay(); }
53
54    virtual void registerScrollbar(ScrollbarThemeClient* scrollbar) { return ScrollbarTheme::theme()->registerScrollbar(scrollbar); }
55    virtual void unregisterScrollbar(ScrollbarThemeClient* scrollbar) { return ScrollbarTheme::theme()->unregisterScrollbar(scrollbar); }
56
57    virtual int minimumThumbLength(ScrollbarThemeClient*);
58
59    void buttonSizesAlongTrackAxis(ScrollbarThemeClient*, int& beforeSize, int& afterSize);
60
61    static RenderScrollbarTheme* renderScrollbarTheme();
62
63protected:
64    virtual bool hasButtons(ScrollbarThemeClient*);
65    virtual bool hasThumb(ScrollbarThemeClient*);
66
67    virtual IntRect backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool painting = false);
68    virtual IntRect forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool painting = false);
69    virtual IntRect trackRect(ScrollbarThemeClient*, bool painting = false);
70
71    virtual void paintScrollbarBackground(GraphicsContext*, ScrollbarThemeClient*);
72    virtual void paintTrackBackground(GraphicsContext*, ScrollbarThemeClient*, const IntRect&);
73    virtual void paintTrackPiece(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, ScrollbarPart);
74    virtual void paintButton(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, ScrollbarPart);
75    virtual void paintThumb(GraphicsContext*, ScrollbarThemeClient*, const IntRect&);
76    virtual void paintTickmarks(GraphicsContext*, ScrollbarThemeClient*, const IntRect&) OVERRIDE;
77
78    virtual IntRect constrainTrackRectToTrackPieces(ScrollbarThemeClient*, const IntRect&);
79};
80
81} // namespace WebCore
82
83#endif // RenderScrollbarTheme_h
84