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 ScrollbarThemeGtk_h
27#define ScrollbarThemeGtk_h
28
29#include "ScrollbarThemeComposite.h"
30
31namespace WebCore {
32
33class Scrollbar;
34
35class ScrollbarThemeGtk final : public ScrollbarThemeComposite {
36public:
37 virtual ~ScrollbarThemeGtk();
38
39 bool hasButtons(Scrollbar&) override;
40 bool hasThumb(Scrollbar&) override;
41 IntRect backButtonRect(Scrollbar&, ScrollbarPart, bool) override;
42 IntRect forwardButtonRect(Scrollbar&, ScrollbarPart, bool) override;
43 IntRect trackRect(Scrollbar&, bool) override;
44
45#ifndef GTK_API_VERSION_2
46 ScrollbarThemeGtk();
47
48 bool paint(Scrollbar&, GraphicsContext&, const IntRect& damageRect) override;
49 ScrollbarButtonPressAction handleMousePressEvent(Scrollbar&, const PlatformMouseEvent&, ScrollbarPart) override;
50 int scrollbarThickness(ScrollbarControlSize, ScrollbarExpansionState = ScrollbarExpansionState::Expanded) override;
51 int minimumThumbLength(Scrollbar&) override;
52
53 // TODO: These are the default GTK+ values. At some point we should pull these from the theme itself.
54 Seconds initialAutoscrollTimerDelay() override { return 200_ms; }
55 Seconds autoscrollTimerDelay() override { return 20_ms; }
56 void themeChanged() override;
57 bool usesOverlayScrollbars() const override { return m_usesOverlayScrollbars; }
58 // When using overlay scrollbars, always invalidate the whole scrollbar when entering/leaving.
59 bool invalidateOnMouseEnterExit() override { return m_usesOverlayScrollbars; }
60
61private:
62 void updateThemeProperties();
63
64 bool m_hasForwardButtonStartPart : 1;
65 bool m_hasForwardButtonEndPart : 1;
66 bool m_hasBackButtonStartPart : 1;
67 bool m_hasBackButtonEndPart : 1;
68 bool m_usesOverlayScrollbars { false };
69#endif // GTK_API_VERSION_2
70};
71
72}
73
74#endif
75