1/*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
4 * Copyright (C) 2002, 2006, 2007, 2012 Apple Inc. All rights reserved.
5 * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#pragma once
24
25#include "ExceptionOr.h"
26#include <wtf/TypeCasts.h>
27
28namespace WebCore {
29
30class CSSStyleSheet;
31class StyleRuleBase;
32
33struct CSSParserContext;
34
35class CSSRule : public RefCounted<CSSRule> {
36public:
37 virtual ~CSSRule() = default;
38
39 enum Type {
40 UNKNOWN_RULE,
41 STYLE_RULE,
42 CHARSET_RULE,
43 IMPORT_RULE,
44 MEDIA_RULE,
45 FONT_FACE_RULE,
46 PAGE_RULE,
47 // 7 was VARIABLES_RULE; we now match other browsers with 7 as
48 // KEYFRAMES_RULE:
49 // <https://bugs.webkit.org/show_bug.cgi?id=71293>.
50 KEYFRAMES_RULE,
51 KEYFRAME_RULE,
52 NAMESPACE_RULE = 10, // Matches other browsers.
53 SUPPORTS_RULE = 12,
54#if ENABLE(CSS_DEVICE_ADAPTATION)
55 WEBKIT_VIEWPORT_RULE = 15,
56#endif
57 };
58
59 enum DeprecatedType {
60 WEBKIT_KEYFRAMES_RULE = 7,
61 WEBKIT_KEYFRAME_RULE = 8
62 };
63
64 virtual Type type() const = 0;
65 virtual String cssText() const = 0;
66 virtual void reattach(StyleRuleBase&) = 0;
67
68 void setParentStyleSheet(CSSStyleSheet* styleSheet)
69 {
70 m_parentIsRule = false;
71 m_parentStyleSheet = styleSheet;
72 }
73
74 void setParentRule(CSSRule* rule)
75 {
76 m_parentIsRule = true;
77 m_parentRule = rule;
78 }
79
80 CSSStyleSheet* parentStyleSheet() const
81 {
82 if (m_parentIsRule)
83 return m_parentRule ? m_parentRule->parentStyleSheet() : 0;
84 return m_parentStyleSheet;
85 }
86
87 CSSRule* parentRule() const { return m_parentIsRule ? m_parentRule : 0; }
88
89 WEBCORE_EXPORT ExceptionOr<void> setCssText(const String&);
90
91protected:
92 CSSRule(CSSStyleSheet* parent)
93 : m_hasCachedSelectorText(false)
94 , m_parentIsRule(false)
95 , m_parentStyleSheet(parent)
96 {
97 }
98
99 bool hasCachedSelectorText() const { return m_hasCachedSelectorText; }
100 void setHasCachedSelectorText(bool hasCachedSelectorText) const { m_hasCachedSelectorText = hasCachedSelectorText; }
101
102 const CSSParserContext& parserContext() const;
103
104private:
105 mutable unsigned char m_hasCachedSelectorText : 1;
106 unsigned char m_parentIsRule : 1;
107
108 union {
109 CSSRule* m_parentRule;
110 CSSStyleSheet* m_parentStyleSheet;
111 };
112};
113
114} // namespace WebCore
115
116#define SPECIALIZE_TYPE_TRAITS_CSS_RULE(ToValueTypeName, predicate) \
117SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
118 static bool isType(const WebCore::CSSRule& rule) { return rule.type() == WebCore::predicate; } \
119SPECIALIZE_TYPE_TRAITS_END()
120