| /* |
| * (C) 1999-2003 Lars Knoll (knoll@kde.org) |
| * (C) 2002-2003 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2002, 2006, 2008, 2012, 2013 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_H_ |
| |
| #include "base/memory/scoped_refptr.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/css/css_property_value_set.h" |
| #include "third_party/blink/renderer/core/css/css_selector_list.h" |
| #include "third_party/blink/renderer/core/css/media_list.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/wtf/casting.h" |
| |
| namespace blink { |
| |
| class CSSRule; |
| class CSSStyleSheet; |
| |
| class CORE_EXPORT StyleRuleBase : public GarbageCollected<StyleRuleBase> { |
| public: |
| enum RuleType { |
| kCharset, |
| kStyle, |
| kImport, |
| kMedia, |
| kFontFace, |
| kPage, |
| kProperty, |
| kKeyframes, |
| kKeyframe, |
| kNamespace, |
| kScrollTimeline, |
| kSupports, |
| kViewport, |
| }; |
| |
| RuleType GetType() const { return static_cast<RuleType>(type_); } |
| |
| bool IsCharsetRule() const { return GetType() == kCharset; } |
| bool IsFontFaceRule() const { return GetType() == kFontFace; } |
| bool IsKeyframesRule() const { return GetType() == kKeyframes; } |
| bool IsKeyframeRule() const { return GetType() == kKeyframe; } |
| bool IsNamespaceRule() const { return GetType() == kNamespace; } |
| bool IsMediaRule() const { return GetType() == kMedia; } |
| bool IsPageRule() const { return GetType() == kPage; } |
| bool IsPropertyRule() const { return GetType() == kProperty; } |
| bool IsStyleRule() const { return GetType() == kStyle; } |
| bool IsScrollTimelineRule() const { return GetType() == kScrollTimeline; } |
| bool IsSupportsRule() const { return GetType() == kSupports; } |
| bool IsViewportRule() const { return GetType() == kViewport; } |
| bool IsImportRule() const { return GetType() == kImport; } |
| |
| StyleRuleBase* Copy() const; |
| |
| // FIXME: There shouldn't be any need for the null parent version. |
| CSSRule* CreateCSSOMWrapper(CSSStyleSheet* parent_sheet = nullptr) const; |
| CSSRule* CreateCSSOMWrapper(CSSRule* parent_rule) const; |
| |
| void Trace(Visitor*) const; |
| void TraceAfterDispatch(blink::Visitor* visitor) const {} |
| void FinalizeGarbageCollectedObject(); |
| |
| // ~StyleRuleBase should be public, because non-public ~StyleRuleBase |
| // causes C2248 error : 'blink::StyleRuleBase::~StyleRuleBase' : cannot |
| // access protected member declared in class 'blink::StyleRuleBase' when |
| // compiling 'source\wtf\refcounted.h' by using msvc. |
| ~StyleRuleBase() = default; |
| |
| protected: |
| StyleRuleBase(RuleType type) : type_(type) {} |
| StyleRuleBase(const StyleRuleBase& rule) : type_(rule.type_) {} |
| |
| private: |
| CSSRule* CreateCSSOMWrapper(CSSStyleSheet* parent_sheet, |
| CSSRule* parent_rule) const; |
| |
| const uint8_t type_; |
| }; |
| |
| // A single rule from a stylesheet. Contains a selector list (one or more |
| // complex selectors) and a collection of style properties to be applied where |
| // those selectors match. These are output by CSSParserImpl. |
| class CORE_EXPORT StyleRule : public StyleRuleBase { |
| public: |
| // Adopts the selector list |
| StyleRule(CSSSelectorList, CSSPropertyValueSet*); |
| StyleRule(CSSSelectorList, CSSLazyPropertyParser*); |
| StyleRule(const StyleRule&); |
| ~StyleRule(); |
| |
| const CSSSelectorList& SelectorList() const { return selector_list_; } |
| const CSSPropertyValueSet& Properties() const; |
| MutableCSSPropertyValueSet& MutableProperties(); |
| |
| void WrapperAdoptSelectorList(CSSSelectorList selectors) { |
| selector_list_ = std::move(selectors); |
| } |
| |
| StyleRule* Copy() const { return MakeGarbageCollected<StyleRule>(*this); } |
| |
| static unsigned AverageSizeInBytes(); |
| |
| // Helper methods to avoid parsing lazy properties when not needed. |
| bool PropertiesHaveFailedOrCanceledSubresources() const; |
| bool ShouldConsiderForMatchingRules(bool include_empty_rules) const; |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| private: |
| friend class CSSLazyParsingTest; |
| bool HasParsedProperties() const; |
| |
| // Whether or not we should consider this for matching rules. Usually we try |
| // to avoid considering empty property sets, as an optimization. This is |
| // not possible for lazy properties, which always need to be considered. The |
| // lazy parser does its best to avoid lazy parsing for properties that look |
| // empty due to lack of tokens. |
| enum ConsiderForMatching { |
| kAlwaysConsider, |
| kConsiderIfNonEmpty, |
| }; |
| mutable ConsiderForMatching should_consider_for_matching_rules_; |
| |
| CSSSelectorList selector_list_; |
| mutable Member<CSSPropertyValueSet> properties_; |
| mutable Member<CSSLazyPropertyParser> lazy_property_parser_; |
| }; |
| |
| class CORE_EXPORT StyleRuleFontFace : public StyleRuleBase { |
| public: |
| StyleRuleFontFace(CSSPropertyValueSet*); |
| StyleRuleFontFace(const StyleRuleFontFace&); |
| |
| const CSSPropertyValueSet& Properties() const { return *properties_; } |
| MutableCSSPropertyValueSet& MutableProperties(); |
| |
| StyleRuleFontFace* Copy() const { |
| return MakeGarbageCollected<StyleRuleFontFace>(*this); |
| } |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| private: |
| Member<CSSPropertyValueSet> properties_; // Cannot be null. |
| }; |
| |
| class StyleRulePage : public StyleRuleBase { |
| public: |
| StyleRulePage(CSSSelectorList, CSSPropertyValueSet*); |
| StyleRulePage(const StyleRulePage&); |
| ~StyleRulePage(); |
| |
| const CSSSelector* Selector() const { return selector_list_.First(); } |
| const CSSPropertyValueSet& Properties() const { return *properties_; } |
| MutableCSSPropertyValueSet& MutableProperties(); |
| |
| void WrapperAdoptSelectorList(CSSSelectorList selectors) { |
| selector_list_ = std::move(selectors); |
| } |
| |
| StyleRulePage* Copy() const { |
| return MakeGarbageCollected<StyleRulePage>(*this); |
| } |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| private: |
| Member<CSSPropertyValueSet> properties_; // Cannot be null. |
| CSSSelectorList selector_list_; |
| }; |
| |
| class StyleRuleProperty : public StyleRuleBase { |
| public: |
| StyleRuleProperty(const String& name, CSSPropertyValueSet*); |
| StyleRuleProperty(const StyleRuleProperty&); |
| ~StyleRuleProperty(); |
| |
| const CSSPropertyValueSet& Properties() const { return *properties_; } |
| MutableCSSPropertyValueSet& MutableProperties(); |
| const String& GetName() const { return name_; } |
| const CSSValue* GetSyntax() const; |
| const CSSValue* Inherits() const; |
| const CSSValue* GetInitialValue() const; |
| |
| StyleRuleProperty* Copy() const { |
| return MakeGarbageCollected<StyleRuleProperty>(*this); |
| } |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| private: |
| String name_; |
| Member<CSSPropertyValueSet> properties_; |
| }; |
| |
| class CORE_EXPORT StyleRuleScrollTimeline : public StyleRuleBase { |
| public: |
| StyleRuleScrollTimeline(const String& name, const CSSPropertyValueSet*); |
| StyleRuleScrollTimeline(const StyleRuleScrollTimeline&) = default; |
| ~StyleRuleScrollTimeline(); |
| |
| StyleRuleScrollTimeline* Copy() const { |
| return MakeGarbageCollected<StyleRuleScrollTimeline>(*this); |
| } |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| const String& GetName() const { return name_; } |
| const CSSValue* GetSource() const { return source_; } |
| const CSSValue* GetOrientation() const { return orientation_; } |
| const CSSValue* GetStart() const { return start_; } |
| const CSSValue* GetEnd() const { return end_; } |
| const CSSValue* GetTimeRange() const { return time_range_; } |
| |
| private: |
| String name_; |
| Member<const CSSValue> source_; |
| Member<const CSSValue> orientation_; |
| Member<const CSSValue> start_; |
| Member<const CSSValue> end_; |
| Member<const CSSValue> time_range_; |
| }; |
| |
| class CORE_EXPORT StyleRuleGroup : public StyleRuleBase { |
| public: |
| const HeapVector<Member<StyleRuleBase>>& ChildRules() const { |
| return child_rules_; |
| } |
| |
| void WrapperInsertRule(unsigned, StyleRuleBase*); |
| void WrapperRemoveRule(unsigned); |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| protected: |
| StyleRuleGroup(RuleType, HeapVector<Member<StyleRuleBase>>& adopt_rule); |
| StyleRuleGroup(const StyleRuleGroup&); |
| |
| private: |
| HeapVector<Member<StyleRuleBase>> child_rules_; |
| }; |
| |
| class CORE_EXPORT StyleRuleCondition : public StyleRuleGroup { |
| public: |
| String ConditionText() const { return condition_text_; } |
| |
| void TraceAfterDispatch(blink::Visitor* visitor) const { |
| StyleRuleGroup::TraceAfterDispatch(visitor); |
| } |
| |
| protected: |
| StyleRuleCondition(RuleType, HeapVector<Member<StyleRuleBase>>& adopt_rule); |
| StyleRuleCondition(RuleType, |
| const String& condition_text, |
| HeapVector<Member<StyleRuleBase>>& adopt_rule); |
| StyleRuleCondition(const StyleRuleCondition&); |
| String condition_text_; |
| }; |
| |
| class CORE_EXPORT StyleRuleMedia : public StyleRuleCondition { |
| public: |
| StyleRuleMedia(scoped_refptr<MediaQuerySet>, |
| HeapVector<Member<StyleRuleBase>>& adopt_rules); |
| StyleRuleMedia(const StyleRuleMedia&); |
| |
| MediaQuerySet* MediaQueries() const { return media_queries_.get(); } |
| |
| StyleRuleMedia* Copy() const { |
| return MakeGarbageCollected<StyleRuleMedia>(*this); |
| } |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| private: |
| scoped_refptr<MediaQuerySet> media_queries_; |
| }; |
| |
| class StyleRuleSupports : public StyleRuleCondition { |
| public: |
| StyleRuleSupports(const String& condition_text, |
| bool condition_is_supported, |
| HeapVector<Member<StyleRuleBase>>& adopt_rules); |
| StyleRuleSupports(const StyleRuleSupports&); |
| |
| bool ConditionIsSupported() const { return condition_is_supported_; } |
| StyleRuleSupports* Copy() const { |
| return MakeGarbageCollected<StyleRuleSupports>(*this); |
| } |
| |
| void TraceAfterDispatch(blink::Visitor* visitor) const { |
| StyleRuleCondition::TraceAfterDispatch(visitor); |
| } |
| |
| private: |
| String condition_text_; |
| bool condition_is_supported_; |
| }; |
| |
| class StyleRuleViewport : public StyleRuleBase { |
| public: |
| explicit StyleRuleViewport(CSSPropertyValueSet*); |
| explicit StyleRuleViewport(const StyleRuleViewport&); |
| |
| const CSSPropertyValueSet& Properties() const { return *properties_; } |
| MutableCSSPropertyValueSet& MutableProperties(); |
| |
| StyleRuleViewport* Copy() const { |
| return MakeGarbageCollected<StyleRuleViewport>(*this); |
| } |
| |
| void TraceAfterDispatch(blink::Visitor*) const; |
| |
| private: |
| Member<CSSPropertyValueSet> properties_; // Cannot be null |
| }; |
| |
| // This should only be used within the CSS Parser |
| class StyleRuleCharset : public StyleRuleBase { |
| public: |
| StyleRuleCharset() : StyleRuleBase(kCharset) {} |
| void TraceAfterDispatch(blink::Visitor* visitor) const { |
| StyleRuleBase::TraceAfterDispatch(visitor); |
| } |
| |
| private: |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRule> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsStyleRule(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRuleFontFace> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsFontFaceRule(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRulePage> { |
| static bool AllowFrom(const StyleRuleBase& rule) { return rule.IsPageRule(); } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRuleProperty> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsPropertyRule(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRuleScrollTimeline> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsScrollTimelineRule(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRuleMedia> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsMediaRule(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRuleSupports> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsSupportsRule(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRuleViewport> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsViewportRule(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<StyleRuleCharset> { |
| static bool AllowFrom(const StyleRuleBase& rule) { |
| return rule.IsCharsetRule(); |
| } |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_H_ |