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 "platform/heap/Handle.h" 27 #include "wtf/RefCounted.h" 28 #include "wtf/text/WTFString.h" 29 30 namespace WebCore { 31 32 class CSSParserContext; 33 class CSSStyleSheet; 34 class StyleRuleBase; 35 36 class CSSRule : public RefCountedWillBeGarbageCollectedFinalized<CSSRule> { 37 public: ~CSSRule()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 KEYFRAMES_RULE, 52 WEBKIT_KEYFRAMES_RULE = KEYFRAMES_RULE, 53 KEYFRAME_RULE, 54 WEBKIT_KEYFRAME_RULE = KEYFRAME_RULE, 55 SUPPORTS_RULE = 12, 56 VIEWPORT_RULE = 15, 57 WEBKIT_FILTER_RULE = 17 58 }; 59 60 virtual Type type() const = 0; 61 virtual String cssText() const = 0; 62 virtual void reattach(StyleRuleBase*) = 0; 63 setParentStyleSheet(CSSStyleSheet * styleSheet)64 void setParentStyleSheet(CSSStyleSheet* styleSheet) 65 { 66 m_parentIsRule = false; 67 m_parentStyleSheet = styleSheet; 68 } 69 setParentRule(CSSRule * rule)70 void setParentRule(CSSRule* rule) 71 { 72 m_parentIsRule = true; 73 m_parentRule = rule; 74 } 75 76 virtual void trace(Visitor*); 77 parentStyleSheet()78 CSSStyleSheet* parentStyleSheet() const 79 { 80 if (m_parentIsRule) 81 return m_parentRule ? m_parentRule->parentStyleSheet() : 0; 82 return m_parentStyleSheet; 83 } 84 parentRule()85 CSSRule* parentRule() const { return m_parentIsRule ? m_parentRule : 0; } 86 87 // NOTE: Just calls notImplemented(). 88 void setCSSText(const String&); 89 90 protected: CSSRule(CSSStyleSheet * parent)91 CSSRule(CSSStyleSheet* parent) 92 : m_hasCachedSelectorText(false) 93 , m_parentIsRule(false) 94 , m_parentStyleSheet(parent) 95 { 96 } 97 hasCachedSelectorText()98 bool hasCachedSelectorText() const { return m_hasCachedSelectorText; } setHasCachedSelectorText(bool hasCachedSelectorText)99 void setHasCachedSelectorText(bool hasCachedSelectorText) const { m_hasCachedSelectorText = hasCachedSelectorText; } 100 101 const CSSParserContext& parserContext() const; 102 103 private: 104 mutable unsigned char m_hasCachedSelectorText : 1; 105 unsigned char m_parentIsRule : 1; 106 107 // These should be Members, but no Members in unions. 108 union { 109 CSSRule* m_parentRule; 110 CSSStyleSheet* m_parentStyleSheet; 111 }; 112 }; 113 114 #define DEFINE_CSS_RULE_TYPE_CASTS(ToType, TYPE_NAME) \ 115 DEFINE_TYPE_CASTS(ToType, CSSRule, rule, rule->type() == CSSRule::TYPE_NAME, rule.type() == CSSRule::TYPE_NAME) 116 117 } // namespace WebCore 118 119 #endif // CSSRule_h 120