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#ifndef CSSRule_h 24#define CSSRule_h 25 26#include <wtf/RefCounted.h> 27#include <wtf/text/WTFString.h> 28 29namespace WebCore { 30 31class CSSStyleSheet; 32class StyleRuleBase; 33struct CSSParserContext; 34typedef int ExceptionCode; 35 36class CSSRule : public RefCounted<CSSRule> { 37public: 38 virtual ~CSSRule() { } 39 40 enum Type { 41 UNKNOWN_RULE, 42 STYLE_RULE, 43 CHARSET_RULE, 44 IMPORT_RULE, 45 MEDIA_RULE, 46 FONT_FACE_RULE, 47 PAGE_RULE, 48 // 7 was VARIABLES_RULE; we now match other browsers with 7 as 49 // KEYFRAMES_RULE: 50 // <https://bugs.webkit.org/show_bug.cgi?id=71293>. 51 WEBKIT_KEYFRAMES_RULE, 52 WEBKIT_KEYFRAME_RULE, 53#if ENABLE(CSS3_CONDITIONAL_RULES) 54 SUPPORTS_RULE = 12, 55#endif 56#if ENABLE(CSS_DEVICE_ADAPTATION) 57 WEBKIT_VIEWPORT_RULE = 15, 58#endif 59#if ENABLE(CSS_REGIONS) 60 WEBKIT_REGION_RULE = 16, 61#endif 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 // NOTE: Just calls notImplemented(). 90 void setCssText(const String&, ExceptionCode&); 91 92protected: 93 CSSRule(CSSStyleSheet* parent) 94 : m_hasCachedSelectorText(false) 95 , m_parentIsRule(false) 96 , m_parentStyleSheet(parent) 97 { 98 } 99 100 bool hasCachedSelectorText() const { return m_hasCachedSelectorText; } 101 void setHasCachedSelectorText(bool hasCachedSelectorText) const { m_hasCachedSelectorText = hasCachedSelectorText; } 102 103 const CSSParserContext& parserContext() const; 104 105private: 106 mutable unsigned char m_hasCachedSelectorText : 1; 107 unsigned char m_parentIsRule : 1; 108 109 union { 110 CSSRule* m_parentRule; 111 CSSStyleSheet* m_parentStyleSheet; 112 }; 113}; 114 115} // namespace WebCore 116 117#endif // CSSRule_h 118