1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22#ifndef PseudoStyleRequest_h
23#define PseudoStyleRequest_h
24
25#include "core/rendering/style/RenderStyleConstants.h"
26#include "platform/scroll/ScrollTypes.h"
27
28namespace blink {
29
30class RenderScrollbar;
31class RenderStyle;
32
33class PseudoStyleRequest {
34public:
35
36    enum RequestType { ForRenderer, ForComputedStyle };
37
38    PseudoStyleRequest(PseudoId pseudoId, RenderScrollbar* scrollbar = 0, ScrollbarPart scrollbarPart = NoPart)
39        : pseudoId(pseudoId)
40        , type(ForRenderer)
41        , scrollbarPart(scrollbarPart)
42        , scrollbar(scrollbar)
43    {
44    }
45
46    PseudoStyleRequest(PseudoId pseudoId, RequestType requestType)
47        : pseudoId(pseudoId)
48        , type(requestType)
49        , scrollbarPart(NoPart)
50        , scrollbar(0)
51    {
52    }
53
54    // The spec disallows inheritance for ::backdrop.
55    bool allowsInheritance(const RenderStyle* parentStyle) const
56    {
57        return parentStyle && pseudoId != BACKDROP;
58    }
59
60    PseudoId pseudoId;
61    RequestType type;
62    ScrollbarPart scrollbarPart;
63    RenderScrollbar* scrollbar;
64};
65
66} // namespace blink
67
68#endif // PseudoStyleRequest_h
69