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 ScrollbarThemeComposite_h
27#define ScrollbarThemeComposite_h
28
29#include "ScrollbarTheme.h"
30
31namespace WebCore {
32
33class ScrollbarThemeComposite : public ScrollbarTheme {
34public:
35    // Implement ScrollbarTheme interface
36    virtual bool paint(ScrollbarThemeClient*, GraphicsContext*, const IntRect& damageRect);
37    virtual ScrollbarPart hitTest(ScrollbarThemeClient*, const IntPoint&);
38    virtual void invalidatePart(ScrollbarThemeClient*, ScrollbarPart);
39    virtual int thumbPosition(ScrollbarThemeClient*);
40    virtual int thumbLength(ScrollbarThemeClient*);
41    virtual int trackPosition(ScrollbarThemeClient*);
42    virtual int trackLength(ScrollbarThemeClient*);
43    virtual void paintScrollCorner(ScrollView*, GraphicsContext*, const IntRect& cornerRect);
44    virtual void paintOverhangAreas(ScrollView*, GraphicsContext*, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect);
45
46    virtual bool hasButtons(ScrollbarThemeClient*) = 0;
47    virtual bool hasThumb(ScrollbarThemeClient*) = 0;
48
49    virtual IntRect backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool painting = false) = 0;
50    virtual IntRect forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool painting = false) = 0;
51    virtual IntRect trackRect(ScrollbarThemeClient*, bool painting = false) = 0;
52    virtual IntRect thumbRect(ScrollbarThemeClient*);
53
54    virtual void splitTrack(ScrollbarThemeClient*, const IntRect& track, IntRect& startTrack, IntRect& thumb, IntRect& endTrack);
55
56    virtual int minimumThumbLength(ScrollbarThemeClient*);
57
58    virtual void paintScrollbarBackground(GraphicsContext*, ScrollbarThemeClient*) { }
59    virtual void paintTrackBackground(GraphicsContext*, ScrollbarThemeClient*, const IntRect&) { }
60    virtual void paintTrackPiece(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, ScrollbarPart) { }
61    virtual void paintButton(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, ScrollbarPart) { }
62    virtual void paintThumb(GraphicsContext*, ScrollbarThemeClient*, const IntRect&) { }
63
64    virtual IntRect constrainTrackRectToTrackPieces(ScrollbarThemeClient*, const IntRect& rect) { return rect; }
65};
66
67}
68#endif
69