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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002-2021 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.
*/
#pragma once
#include "CSSSelectorList.h"
#include "CompiledSelector.h"
#include "FontPaletteValues.h"
#include "StyleProperties.h"
#include "StyleRuleType.h"
#include <variant>
#include <wtf/RefPtr.h>
#include <wtf/TypeCasts.h>
#include <wtf/UniqueArray.h>
namespace WebCore {
class CSSRule;
class CSSStyleRule;
class CSSStyleSheet;
class MediaQuerySet;
class MutableStyleProperties;
class StyleRuleKeyframe;
class StyleProperties;
class StyleRuleKeyframes;
using CascadeLayerName = Vector<AtomString>;
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(StyleRuleBase);
class StyleRuleBase : public WTF::RefCountedBase {
WTF_MAKE_STRUCT_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(StyleRuleBase);
public:
StyleRuleType type() const { return static_cast<StyleRuleType>(m_type); }
bool isCharsetRule() const { return type() == StyleRuleType::Charset; }
bool isCounterStyleRule() const { return type() == StyleRuleType::CounterStyle; }
bool isFontFaceRule() const { return type() == StyleRuleType::FontFace; }
bool isFontPaletteValuesRule() const { return type() == StyleRuleType::FontPaletteValues; }
bool isKeyframesRule() const { return type() == StyleRuleType::Keyframes; }
bool isKeyframeRule() const { return type() == StyleRuleType::Keyframe; }
bool isNamespaceRule() const { return type() == StyleRuleType::Namespace; }
bool isMediaRule() const { return type() == StyleRuleType::Media; }
bool isPageRule() const { return type() == StyleRuleType::Page; }
bool isStyleRule() const { return type() == StyleRuleType::Style; }
bool isGroupRule() const { return type() == StyleRuleType::Media || type() == StyleRuleType::Supports || type() == StyleRuleType::Layer; }
bool isSupportsRule() const { return type() == StyleRuleType::Supports; }
bool isImportRule() const { return type() == StyleRuleType::Import; }
bool isLayerRule() const { return type() == StyleRuleType::Layer; }
Ref<StyleRuleBase> copy() const;
void deref() const;
// FIXME: There shouldn't be any need for the null parent version.
Ref<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet = nullptr) const;
Ref<CSSRule> createCSSOMWrapper(CSSRule* parentRule) const;
protected:
explicit StyleRuleBase(StyleRuleType, bool hasDocumentSecurityOrigin = false);
StyleRuleBase(const StyleRuleBase&);
~StyleRuleBase() = default;
bool hasDocumentSecurityOrigin() const { return m_hasDocumentSecurityOrigin; }
private:
WEBCORE_EXPORT void destroy();
Ref<CSSRule> createCSSOMWrapper(CSSStyleSheet* parentSheet, CSSRule* parentRule) const;
unsigned m_type : 5; // StyleRuleType
// This is only needed to support getMatchedCSSRules.
unsigned m_hasDocumentSecurityOrigin : 1;
};
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(StyleRule);
class StyleRule final : public StyleRuleBase {
WTF_MAKE_STRUCT_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(StyleRule);
public:
static Ref<StyleRule> create(Ref<StylePropertiesBase>&&, bool hasDocumentSecurityOrigin, CSSSelectorList&&);
Ref<StyleRule> copy() const;
~StyleRule();
const CSSSelectorList& selectorList() const { return m_selectorList; }
const StyleProperties& properties() const;
MutableStyleProperties& mutableProperties();
const StyleProperties* propertiesWithoutDeferredParsing() const;
bool isSplitRule() const { return m_isSplitRule; }
void markAsSplitRule() { m_isSplitRule = true; }
bool isLastRuleInSplitRule() const { return m_isLastRuleInSplitRule; }
void markAsLastRuleInSplitRule() { m_isLastRuleInSplitRule = true; }
using StyleRuleBase::hasDocumentSecurityOrigin;
void wrapperAdoptSelectorList(CSSSelectorList&&);
Vector<RefPtr<StyleRule>> splitIntoMultipleRulesWithMaximumSelectorComponentCount(unsigned) const;
#if ENABLE(CSS_SELECTOR_JIT)
CompiledSelector& compiledSelectorForListIndex(unsigned index) const;
void releaseCompiledSelectors() const { m_compiledSelectors = nullptr; }
#endif
static unsigned averageSizeInBytes();
private:
StyleRule(Ref<StylePropertiesBase>&&, bool hasDocumentSecurityOrigin, CSSSelectorList&&);
StyleRule(const StyleRule&);
static Ref<StyleRule> createForSplitting(const Vector<const CSSSelector*>&, Ref<StyleProperties>&&, bool hasDocumentSecurityOrigin);
mutable Ref<StylePropertiesBase> m_properties;
CSSSelectorList m_selectorList;
#if ENABLE(CSS_SELECTOR_JIT)
mutable UniqueArray<CompiledSelector> m_compiledSelectors;
#endif
bool m_isSplitRule { false };
bool m_isLastRuleInSplitRule { false };
};
class StyleRuleFontFace final : public StyleRuleBase {
public:
static Ref<StyleRuleFontFace> create(Ref<StyleProperties>&& properties) { return adoptRef(*new StyleRuleFontFace(WTFMove(properties))); }
~StyleRuleFontFace();
const StyleProperties& properties() const { return m_properties; }
MutableStyleProperties& mutableProperties();
Ref<StyleRuleFontFace> copy() const { return adoptRef(*new StyleRuleFontFace(*this)); }
private:
explicit StyleRuleFontFace(Ref<StyleProperties>&&);
StyleRuleFontFace(const StyleRuleFontFace&);
Ref<StyleProperties> m_properties;
};
class StyleRuleFontPaletteValues final : public StyleRuleBase {
public:
static Ref<StyleRuleFontPaletteValues> create(const AtomString& name, const AtomString& fontFamily, std::optional<FontPaletteIndex> basePalette, Vector<FontPaletteValues::OverriddenColor>&& overrideColors)
{
return adoptRef(*new StyleRuleFontPaletteValues(name, fontFamily, basePalette, WTFMove(overrideColors)));
}
~StyleRuleFontPaletteValues();
const AtomString& name() const
{
return m_name;
}
const AtomString& fontFamily() const
{
return m_fontFamily;
}
const FontPaletteValues& fontPaletteValues() const
{
return m_fontPaletteValues;
}
std::optional<FontPaletteIndex> basePalette() const
{
return m_fontPaletteValues.basePalette();
}
const Vector<FontPaletteValues::OverriddenColor>& overrideColors() const
{
return m_fontPaletteValues.overrideColors();
}
Ref<StyleRuleFontPaletteValues> copy() const { return adoptRef(*new StyleRuleFontPaletteValues(*this)); }
private:
StyleRuleFontPaletteValues(const AtomString& name, const AtomString& fontFamily, std::optional<FontPaletteIndex> basePalette, Vector<FontPaletteValues::OverriddenColor>&& overrideColors);
StyleRuleFontPaletteValues(const StyleRuleFontPaletteValues&);
AtomString m_name;
AtomString m_fontFamily;
FontPaletteValues m_fontPaletteValues;
};
class StyleRulePage final : public StyleRuleBase {
public:
static Ref<StyleRulePage> create(Ref<StyleProperties>&&, CSSSelectorList&&);
~StyleRulePage();
const CSSSelector* selector() const { return m_selectorList.first(); }
const StyleProperties& properties() const { return m_properties; }
MutableStyleProperties& mutableProperties();
void wrapperAdoptSelectorList(CSSSelectorList&& selectors) { m_selectorList = WTFMove(selectors); }
Ref<StyleRulePage> copy() const { return adoptRef(*new StyleRulePage(*this)); }
private:
explicit StyleRulePage(Ref<StyleProperties>&&, CSSSelectorList&&);
StyleRulePage(const StyleRulePage&);
Ref<StyleProperties> m_properties;
CSSSelectorList m_selectorList;
};
class DeferredStyleGroupRuleList final {
WTF_MAKE_FAST_ALLOCATED;
public:
DeferredStyleGroupRuleList(const CSSParserTokenRange&, CSSDeferredParser&);
void parseDeferredRules(Vector<RefPtr<StyleRuleBase>>&);
void parseDeferredKeyframes(StyleRuleKeyframes&);
private:
Vector<CSSParserToken> m_tokens;
Ref<CSSDeferredParser> m_parser;
};
class StyleRuleGroup : public StyleRuleBase {
public:
const Vector<RefPtr<StyleRuleBase>>& childRules() const;
const Vector<RefPtr<StyleRuleBase>>* childRulesWithoutDeferredParsing() const;
void wrapperInsertRule(unsigned, Ref<StyleRuleBase>&&);
void wrapperRemoveRule(unsigned);
protected:
StyleRuleGroup(StyleRuleType, Vector<RefPtr<StyleRuleBase>>&&);
StyleRuleGroup(StyleRuleType, std::unique_ptr<DeferredStyleGroupRuleList>&&);
StyleRuleGroup(const StyleRuleGroup&);
private:
void parseDeferredRulesIfNeeded() const;
mutable Vector<RefPtr<StyleRuleBase>> m_childRules;
mutable std::unique_ptr<DeferredStyleGroupRuleList> m_deferredRules;
};
class StyleRuleMedia final : public StyleRuleGroup {
public:
static Ref<StyleRuleMedia> create(Ref<MediaQuerySet>&&, Vector<RefPtr<StyleRuleBase>>&&);
static Ref<StyleRuleMedia> create(Ref<MediaQuerySet>&&, std::unique_ptr<DeferredStyleGroupRuleList>&&);
Ref<StyleRuleMedia> copy() const;
MediaQuerySet& mediaQueries() const { return m_mediaQueries; }
private:
StyleRuleMedia(Ref<MediaQuerySet>&&, Vector<RefPtr<StyleRuleBase>>&&);
StyleRuleMedia(Ref<MediaQuerySet>&&, std::unique_ptr<DeferredStyleGroupRuleList>&&);
StyleRuleMedia(const StyleRuleMedia&);
Ref<MediaQuerySet> m_mediaQueries;
};
class StyleRuleSupports final : public StyleRuleGroup {
public:
static Ref<StyleRuleSupports> create(const String& conditionText, bool conditionIsSupported, Vector<RefPtr<StyleRuleBase>>&&);
static Ref<StyleRuleSupports> create(const String& conditionText, bool conditionIsSupported, std::unique_ptr<DeferredStyleGroupRuleList>&&);
Ref<StyleRuleSupports> copy() const { return adoptRef(*new StyleRuleSupports(*this)); }
String conditionText() const { return m_conditionText; }
bool conditionIsSupported() const { return m_conditionIsSupported; }
private:
StyleRuleSupports(const String& conditionText, bool conditionIsSupported, Vector<RefPtr<StyleRuleBase>>&&);
StyleRuleSupports(const String& conditionText, bool conditionIsSupported, std::unique_ptr<DeferredStyleGroupRuleList>&&);
StyleRuleSupports(const StyleRuleSupports&);
String m_conditionText;
bool m_conditionIsSupported;
};
class StyleRuleLayer final : public StyleRuleGroup {
public:
static Ref<StyleRuleLayer> createStatement(Vector<CascadeLayerName>&&);
static Ref<StyleRuleLayer> createBlock(CascadeLayerName&&, Vector<RefPtr<StyleRuleBase>>&&);
static Ref<StyleRuleLayer> createBlock(CascadeLayerName&&, std::unique_ptr<DeferredStyleGroupRuleList>&&);
Ref<StyleRuleLayer> copy() const { return adoptRef(*new StyleRuleLayer(*this)); }
bool isStatement() const { return std::holds_alternative<Vector<CascadeLayerName>>(m_nameVariant); }
auto& name() const { return std::get<CascadeLayerName>(m_nameVariant); }
auto& nameList() const { return std::get<Vector<CascadeLayerName>>(m_nameVariant); }
private:
StyleRuleLayer(Vector<CascadeLayerName>&&);
StyleRuleLayer(CascadeLayerName&&, Vector<RefPtr<StyleRuleBase>>&&);
StyleRuleLayer(CascadeLayerName&&, std::unique_ptr<DeferredStyleGroupRuleList>&&);
StyleRuleLayer(const StyleRuleLayer&);
std::variant<CascadeLayerName, Vector<CascadeLayerName>> m_nameVariant;
};
// This is only used by the CSS parser.
class StyleRuleCharset final : public StyleRuleBase {
public:
static Ref<StyleRuleCharset> create() { return adoptRef(*new StyleRuleCharset); }
Ref<StyleRuleCharset> copy() const { return adoptRef(*new StyleRuleCharset(*this)); }
private:
StyleRuleCharset();
StyleRuleCharset(const StyleRuleCharset&);
};
class StyleRuleNamespace final : public StyleRuleBase {
public:
static Ref<StyleRuleNamespace> create(const AtomString& prefix, const AtomString& uri);
~StyleRuleNamespace();
Ref<StyleRuleNamespace> copy() const { return adoptRef(*new StyleRuleNamespace(*this)); }
AtomString prefix() const { return m_prefix; }
AtomString uri() const { return m_uri; }
private:
StyleRuleNamespace(const AtomString& prefix, const AtomString& uri);
StyleRuleNamespace(const StyleRuleNamespace&);
AtomString m_prefix;
AtomString m_uri;
};
inline StyleRuleBase::StyleRuleBase(StyleRuleType type, bool hasDocumentSecurityOrigin)
: m_type(static_cast<unsigned>(type))
, m_hasDocumentSecurityOrigin(hasDocumentSecurityOrigin)
{
}
inline StyleRuleBase::StyleRuleBase(const StyleRuleBase& o)
: WTF::RefCountedBase()
, m_type(o.m_type)
, m_hasDocumentSecurityOrigin(o.m_hasDocumentSecurityOrigin)
{
}
inline void StyleRuleBase::deref() const
{
if (derefBase())
const_cast<StyleRuleBase&>(*this).destroy();
}
inline void StyleRule::wrapperAdoptSelectorList(CSSSelectorList&& selectors)
{
m_selectorList = WTFMove(selectors);
#if ENABLE(CSS_SELECTOR_JIT)
m_compiledSelectors = nullptr;
#endif
}
#if ENABLE(CSS_SELECTOR_JIT)
inline CompiledSelector& StyleRule::compiledSelectorForListIndex(unsigned index) const
{
if (!m_compiledSelectors)
m_compiledSelectors = makeUniqueArray<CompiledSelector>(m_selectorList.listSize());
return m_compiledSelectors[index];
}
#endif
inline const StyleProperties* StyleRule::propertiesWithoutDeferredParsing() const
{
return m_properties->type() != DeferredPropertiesType ? &downcast<StyleProperties>(m_properties.get()) : nullptr;
}
inline const Vector<RefPtr<StyleRuleBase>>* StyleRuleGroup::childRulesWithoutDeferredParsing() const
{
return !m_deferredRules ? &m_childRules : nullptr;
}
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRule)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isStyleRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleGroup)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isGroupRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleFontFace)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isFontFaceRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleFontPaletteValues)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isFontPaletteValuesRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleMedia)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isMediaRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRulePage)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isPageRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleSupports)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isSupportsRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleNamespace)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isNamespaceRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleKeyframe)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isKeyframeRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleCharset)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isCharsetRule(); }
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::StyleRuleLayer)
static bool isType(const WebCore::StyleRuleBase& rule) { return rule.isLayerRule(); }
SPECIALIZE_TYPE_TRAITS_END()