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#pragma once
27
28#include "ScrollbarTheme.h"
29
30#if PLATFORM(COCOA)
31OBJC_CLASS NSScrollerImp;
32#endif
33
34namespace WebCore {
35
36class ScrollbarThemeComposite : public ScrollbarTheme {
37public:
38 // Implement ScrollbarTheme interface
39 bool paint(Scrollbar&, GraphicsContext&, const IntRect& damageRect) override;
40 ScrollbarPart hitTest(Scrollbar&, const IntPoint&) override;
41 void invalidatePart(Scrollbar&, ScrollbarPart) override;
42 int thumbPosition(Scrollbar&) override;
43 int thumbLength(Scrollbar&) override;
44 int trackPosition(Scrollbar&) override;
45 int trackLength(Scrollbar&) override;
46 void paintOverhangAreas(ScrollView&, GraphicsContext&, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect) override;
47
48 virtual bool hasButtons(Scrollbar&) = 0;
49 virtual bool hasThumb(Scrollbar&) = 0;
50
51 virtual IntRect backButtonRect(Scrollbar&, ScrollbarPart, bool painting = false) = 0;
52 virtual IntRect forwardButtonRect(Scrollbar&, ScrollbarPart, bool painting = false) = 0;
53 virtual IntRect trackRect(Scrollbar&, bool painting = false) = 0;
54 virtual IntRect thumbRect(Scrollbar&);
55
56 virtual void splitTrack(Scrollbar&, const IntRect& track, IntRect& startTrack, IntRect& thumb, IntRect& endTrack);
57
58 virtual int minimumThumbLength(Scrollbar&);
59
60 virtual void willPaintScrollbar(GraphicsContext&, Scrollbar&) { }
61 virtual void didPaintScrollbar(GraphicsContext&, Scrollbar&) { }
62
63 virtual void paintScrollbarBackground(GraphicsContext&, Scrollbar&) { }
64 virtual void paintTrackBackground(GraphicsContext&, Scrollbar&, const IntRect&) { }
65 virtual void paintTrackPiece(GraphicsContext&, Scrollbar&, const IntRect&, ScrollbarPart) { }
66 virtual void paintButton(GraphicsContext&, Scrollbar&, const IntRect&, ScrollbarPart) { }
67 virtual void paintThumb(GraphicsContext&, Scrollbar&, const IntRect&) { }
68
69 virtual IntRect constrainTrackRectToTrackPieces(Scrollbar&, const IntRect& rect) { return rect; }
70};
71
72}
73