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