third_party/WebKit/Source/core/css/StyleRule.h

   1 /*
   2  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
   3  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
   4  * Copyright (C) 2002, 2006, 2008, 2012, 2013 Apple Inc. All rights reserved.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  */
  21
  22 #ifndef StyleRule_h
  23 #define StyleRule_h
  24
  25 #include "core/CoreExport.h"
  26 #include "core/css/CSSSelectorList.h"
  27 #include "core/css/MediaList.h"
  28 #include "core/css/StylePropertySet.h"
  29 #include "platform/heap/Handle.h"
  30 #include "wtf/RefPtr.h"
  31
  32 namespace blink {
  33
  34 class CSSRule;
  35 class CSSStyleSheet;
  36
  37 class CORE_EXPORT StyleRuleBase : public RefCountedWillBeGarbageCollectedFinalized<StyleRuleBase> {
  38     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(StyleRuleBase);
  39 public:
  40     enum Type {
  41         Charset,
  42         Style,
  43         Import,
  44         Media,
  45         FontFace,
  46         Page,
  47         Keyframes,
  48         Keyframe,
  49         Namespace,
  50         Supports,
  51         Viewport,
  52     };
  53
  54     Type type() const { return static_cast<Type>(m_type); }
  55
  56     bool isCharsetRule() const { return type() == Charset; }
  57     bool isFontFaceRule() const { return type() == FontFace; }
  58     bool isKeyframesRule() const { return type() == Keyframes; }
  59     bool isKeyframeRule() const { return type() == Keyframe; }
  60     bool isNamespaceRule() const { return type() == Namespace; }
  61     bool isMediaRule() const { return type() == Media; }
  62     bool isPageRule() const { return type() == Page; }
  63     bool isStyleRule() const { return type() == Style; }
  64     bool isSupportsRule() const { return type() == Supports; }
  65     bool isViewportRule() const { return type() == Viewport; }
  66     bool isImportRule() const { return type() == Import; }
  67
  68     PassRefPtrWillBeRawPtr<StyleRuleBase> copy() const;
  69
  70 #if !ENABLE(OILPAN)
  71     void deref()
  72     {
  73         if (derefBase())
  74             destroy();
  75     }
  76 #endif // !ENABLE(OILPAN)
  77
  78     // FIXME: There shouldn't be any need for the null parent version.
  79     PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet = 0) const;
  80     PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSRule* parentRule) const;
  81
  82     DECLARE_TRACE();
  83     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { }
  84     void finalizeGarbageCollectedObject();
  85
  86     // ~StyleRuleBase should be public, because non-public ~StyleRuleBase
  87     // causes C2248 error : 'blink::StyleRuleBase::~StyleRuleBase' : cannot
  88     // access protected member declared in class 'blink::StyleRuleBase' when
  89     // compiling 'source\wtf\refcounted.h' by using msvc.
  90     ~StyleRuleBase() { }
  91
  92 protected:
  93     StyleRuleBase(Type type) : m_type(type) { }
  94     StyleRuleBase(const StyleRuleBase& o) : m_type(o.m_type) { }
  95
  96 private:
  97     void destroy();
  98
  99     PassRefPtrWillBeRawPtr<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet, CSSRule* parentRule) const;
 100
 101     unsigned m_type : 5;
 102 };
 103
 104 class StyleRule : public StyleRuleBase {
 105     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(StyleRule);
 106 public:
 107     // Adopts the selector list
 108     static PassRefPtrWillBeRawPtr<StyleRule> create(CSSSelectorList& selectorList, PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 109     {
 110         return adoptRefWillBeNoop(new StyleRule(selectorList, properties));
 111     }
 112
 113     ~StyleRule();
 114
 115     const CSSSelectorList& selectorList() const { return m_selectorList; }
 116     const StylePropertySet& properties() const { return *m_properties; }
 117     MutableStylePropertySet& mutableProperties();
 118
 119     void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList.adopt(selectors); }
 120
 121     PassRefPtrWillBeRawPtr<StyleRule> copy() const { return adoptRefWillBeNoop(new StyleRule(*this)); }
 122
 123     static unsigned averageSizeInBytes();
 124
 125     DECLARE_TRACE_AFTER_DISPATCH();
 126
 127 private:
 128     StyleRule(CSSSelectorList&, PassRefPtrWillBeRawPtr<StylePropertySet>);
 129     StyleRule(const StyleRule&);
 130
 131     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
 132     CSSSelectorList m_selectorList;
 133 };
 134
 135 class StyleRuleFontFace : public StyleRuleBase {
 136 public:
 137     static PassRefPtrWillBeRawPtr<StyleRuleFontFace> create(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 138     {
 139         return adoptRefWillBeNoop(new StyleRuleFontFace(properties));
 140     }
 141
 142     ~StyleRuleFontFace();
 143
 144     const StylePropertySet& properties() const { return *m_properties; }
 145     MutableStylePropertySet& mutableProperties();
 146
 147     PassRefPtrWillBeRawPtr<StyleRuleFontFace> copy() const { return adoptRefWillBeNoop(new StyleRuleFontFace(*this)); }
 148
 149     DECLARE_TRACE_AFTER_DISPATCH();
 150
 151 private:
 152     StyleRuleFontFace(PassRefPtrWillBeRawPtr<StylePropertySet>);
 153     StyleRuleFontFace(const StyleRuleFontFace&);
 154
 155     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
 156 };
 157
 158 class StyleRulePage : public StyleRuleBase {
 159 public:
 160     // Adopts the selector list
 161     static PassRefPtrWillBeRawPtr<StyleRulePage> create(CSSSelectorList& selectorList, PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 162     {
 163         return adoptRefWillBeNoop(new StyleRulePage(selectorList, properties));
 164     }
 165
 166     ~StyleRulePage();
 167
 168     const CSSSelector* selector() const { return m_selectorList.first(); }
 169     const StylePropertySet& properties() const { return *m_properties; }
 170     MutableStylePropertySet& mutableProperties();
 171
 172     void wrapperAdoptSelectorList(CSSSelectorList& selectors) { m_selectorList.adopt(selectors); }
 173
 174     PassRefPtrWillBeRawPtr<StyleRulePage> copy() const { return adoptRefWillBeNoop(new StyleRulePage(*this)); }
 175
 176     DECLARE_TRACE_AFTER_DISPATCH();
 177
 178 private:
 179     StyleRulePage(CSSSelectorList&, PassRefPtrWillBeRawPtr<StylePropertySet>);
 180     StyleRulePage(const StyleRulePage&);
 181
 182     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null.
 183     CSSSelectorList m_selectorList;
 184 };
 185
 186 class StyleRuleGroup : public StyleRuleBase {
 187 public:
 188     const WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& childRules() const { return m_childRules; }
 189
 190     void wrapperInsertRule(unsigned, PassRefPtrWillBeRawPtr<StyleRuleBase>);
 191     void wrapperRemoveRule(unsigned);
 192
 193     DECLARE_TRACE_AFTER_DISPATCH();
 194
 195 protected:
 196     StyleRuleGroup(Type, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRule);
 197     StyleRuleGroup(const StyleRuleGroup&);
 198
 199 private:
 200     WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>> m_childRules;
 201 };
 202
 203 class StyleRuleMedia : public StyleRuleGroup {
 204 public:
 205     static PassRefPtrWillBeRawPtr<StyleRuleMedia> create(PassRefPtrWillBeRawPtr<MediaQuerySet> media, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
 206     {
 207         return adoptRefWillBeNoop(new StyleRuleMedia(media, adoptRules));
 208     }
 209
 210     MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }
 211
 212     PassRefPtrWillBeRawPtr<StyleRuleMedia> copy() const { return adoptRefWillBeNoop(new StyleRuleMedia(*this)); }
 213
 214     DECLARE_TRACE_AFTER_DISPATCH();
 215
 216 private:
 217     StyleRuleMedia(PassRefPtrWillBeRawPtr<MediaQuerySet>, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules);
 218     StyleRuleMedia(const StyleRuleMedia&);
 219
 220     RefPtrWillBeMember<MediaQuerySet> m_mediaQueries;
 221 };
 222
 223 class StyleRuleSupports : public StyleRuleGroup {
 224 public:
 225     static PassRefPtrWillBeRawPtr<StyleRuleSupports> create(const String& conditionText, bool conditionIsSupported, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules)
 226     {
 227         return adoptRefWillBeNoop(new StyleRuleSupports(conditionText, conditionIsSupported, adoptRules));
 228     }
 229
 230     String conditionText() const { return m_conditionText; }
 231     bool conditionIsSupported() const { return m_conditionIsSupported; }
 232     PassRefPtrWillBeRawPtr<StyleRuleSupports> copy() const { return adoptRefWillBeNoop(new StyleRuleSupports(*this)); }
 233
 234     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { StyleRuleGroup::traceAfterDispatch(visitor); }
 235
 236 private:
 237     StyleRuleSupports(const String& conditionText, bool conditionIsSupported, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& adoptRules);
 238     StyleRuleSupports(const StyleRuleSupports&);
 239
 240     String m_conditionText;
 241     bool m_conditionIsSupported;
 242 };
 243
 244 class StyleRuleViewport : public StyleRuleBase {
 245 public:
 246     static PassRefPtrWillBeRawPtr<StyleRuleViewport> create(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 247     {
 248         return adoptRefWillBeNoop(new StyleRuleViewport(properties));
 249     }
 250
 251     ~StyleRuleViewport();
 252
 253     const StylePropertySet& properties() const { return *m_properties; }
 254     MutableStylePropertySet& mutableProperties();
 255
 256     PassRefPtrWillBeRawPtr<StyleRuleViewport> copy() const { return adoptRefWillBeNoop(new StyleRuleViewport(*this)); }
 257
 258     DECLARE_TRACE_AFTER_DISPATCH();
 259
 260 private:
 261     StyleRuleViewport(PassRefPtrWillBeRawPtr<StylePropertySet>);
 262     StyleRuleViewport(const StyleRuleViewport&);
 263
 264     RefPtrWillBeMember<StylePropertySet> m_properties; // Cannot be null
 265 };
 266
 267 // This should only be used within the CSS Parser
 268 class StyleRuleCharset : public StyleRuleBase {
 269     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(StyleRuleCharset);
 270 public:
 271     static PassRefPtrWillBeRawPtr<StyleRuleCharset> create() { return adoptRefWillBeNoop(new StyleRuleCharset()); }
 272     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { StyleRuleBase::traceAfterDispatch(visitor); }
 273
 274 private:
 275     StyleRuleCharset() : StyleRuleBase(Charset) { }
 276 };
 277
 278
 279 #define DEFINE_STYLE_RULE_TYPE_CASTS(Type) \
 280     DEFINE_TYPE_CASTS(StyleRule##Type, StyleRuleBase, rule, rule->is##Type##Rule(), rule.is##Type##Rule())
 281
 282 DEFINE_TYPE_CASTS(StyleRule, StyleRuleBase, rule, rule->isStyleRule(), rule.isStyleRule());
 283 DEFINE_STYLE_RULE_TYPE_CASTS(FontFace);
 284 DEFINE_STYLE_RULE_TYPE_CASTS(Page);
 285 DEFINE_STYLE_RULE_TYPE_CASTS(Media);
 286 DEFINE_STYLE_RULE_TYPE_CASTS(Supports);
 287 DEFINE_STYLE_RULE_TYPE_CASTS(Viewport);
 288 DEFINE_STYLE_RULE_TYPE_CASTS(Charset);
 289
 290 } // namespace blink
 291
 292 #endif // StyleRule_h