blob: ab53273a6033e5e1248bbc26fcc5f15061c8901f [file] [log] [blame]
/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002, 2005, 2006, 2008, 2012 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.
*/
#include "config.h"
#include "StyleRule.h"
#include "CSSDeferredParser.h"
#include "CSSFontFaceRule.h"
#include "CSSImportRule.h"
#include "CSSKeyframeRule.h"
#include "CSSKeyframesRule.h"
#include "CSSMediaRule.h"
#include "CSSNamespaceRule.h"
#include "CSSPageRule.h"
#include "CSSStyleRule.h"
#include "CSSSupportsRule.h"
#include "MediaList.h"
#include "StyleProperties.h"
#include "StyleRuleImport.h"
namespace WebCore {
struct SameSizeAsStyleRuleBase : public WTF::RefCountedBase {
unsigned bitfields : 5;
};
COMPILE_ASSERT(sizeof(StyleRuleBase) == sizeof(SameSizeAsStyleRuleBase), StyleRuleBase_should_stay_small);
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(StyleRuleBase);
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(StyleRule);
Ref<CSSRule> StyleRuleBase::createCSSOMWrapper(CSSStyleSheet* parentSheet) const
{
return createCSSOMWrapper(parentSheet, nullptr);
}
Ref<CSSRule> StyleRuleBase::createCSSOMWrapper(CSSRule* parentRule) const
{
return createCSSOMWrapper(nullptr, parentRule);
}
void StyleRuleBase::destroy()
{
switch (type()) {
case StyleRuleType::Style:
delete downcast<StyleRule>(this);
return;
case StyleRuleType::Page:
delete downcast<StyleRulePage>(this);
return;
case StyleRuleType::FontFace:
delete downcast<StyleRuleFontFace>(this);
return;
case StyleRuleType::Media:
delete downcast<StyleRuleMedia>(this);
return;
case StyleRuleType::Supports:
delete downcast<StyleRuleSupports>(this);
return;
case StyleRuleType::Import:
delete downcast<StyleRuleImport>(this);
return;
case StyleRuleType::Keyframes:
delete downcast<StyleRuleKeyframes>(this);
return;
case StyleRuleType::Namespace:
delete downcast<StyleRuleNamespace>(this);
return;
case StyleRuleType::Keyframe:
delete downcast<StyleRuleKeyframe>(this);
return;
case StyleRuleType::Charset:
delete downcast<StyleRuleCharset>(this);
return;
case StyleRuleType::Unknown:
ASSERT_NOT_REACHED();
return;
}
ASSERT_NOT_REACHED();
}
Ref<StyleRuleBase> StyleRuleBase::copy() const
{
switch (type()) {
case StyleRuleType::Style:
return downcast<StyleRule>(*this).copy();
case StyleRuleType::Page:
return downcast<StyleRulePage>(*this).copy();
case StyleRuleType::FontFace:
return downcast<StyleRuleFontFace>(*this).copy();
case StyleRuleType::Media:
return downcast<StyleRuleMedia>(*this).copy();
case StyleRuleType::Supports:
return downcast<StyleRuleSupports>(*this).copy();
case StyleRuleType::Keyframes:
return downcast<StyleRuleKeyframes>(*this).copy();
case StyleRuleType::Import:
case StyleRuleType::Namespace:
// FIXME: Copy import and namespace rules.
break;
case StyleRuleType::Unknown:
case StyleRuleType::Charset:
case StyleRuleType::Keyframe:
break;
}
CRASH();
}
Ref<CSSRule> StyleRuleBase::createCSSOMWrapper(CSSStyleSheet* parentSheet, CSSRule* parentRule) const
{
RefPtr<CSSRule> rule;
StyleRuleBase& self = const_cast<StyleRuleBase&>(*this);
switch (type()) {
case StyleRuleType::Style:
rule = CSSStyleRule::create(downcast<StyleRule>(self), parentSheet);
break;
case StyleRuleType::Page:
rule = CSSPageRule::create(downcast<StyleRulePage>(self), parentSheet);
break;
case StyleRuleType::FontFace:
rule = CSSFontFaceRule::create(downcast<StyleRuleFontFace>(self), parentSheet);
break;
case StyleRuleType::Media:
rule = CSSMediaRule::create(downcast<StyleRuleMedia>(self), parentSheet);
break;
case StyleRuleType::Supports:
rule = CSSSupportsRule::create(downcast<StyleRuleSupports>(self), parentSheet);
break;
case StyleRuleType::Import:
rule = CSSImportRule::create(downcast<StyleRuleImport>(self), parentSheet);
break;
case StyleRuleType::Keyframes:
rule = CSSKeyframesRule::create(downcast<StyleRuleKeyframes>(self), parentSheet);
break;
case StyleRuleType::Namespace:
rule = CSSNamespaceRule::create(downcast<StyleRuleNamespace>(self), parentSheet);
break;
case StyleRuleType::Unknown:
case StyleRuleType::Charset:
case StyleRuleType::Keyframe:
ASSERT_NOT_REACHED();
break;
}
ASSERT(rule);
if (parentRule)
rule->setParentRule(parentRule);
return rule.releaseNonNull();
}
unsigned StyleRule::averageSizeInBytes()
{
return sizeof(StyleRule) + sizeof(CSSSelector) + StyleProperties::averageSizeInBytes();
}
StyleRule::StyleRule(Ref<StylePropertiesBase>&& properties, bool hasDocumentSecurityOrigin, CSSSelectorList&& selectors)
: StyleRuleBase(StyleRuleType::Style, hasDocumentSecurityOrigin)
, m_properties(WTFMove(properties))
, m_selectorList(WTFMove(selectors))
{
}
StyleRule::StyleRule(const StyleRule& o)
: StyleRuleBase(o)
, m_properties(o.properties().mutableCopy())
, m_selectorList(o.m_selectorList)
{
}
StyleRule::~StyleRule() = default;
const StyleProperties& StyleRule::properties() const
{
if (m_properties->type() == DeferredPropertiesType)
m_properties = downcast<DeferredStyleProperties>(m_properties.get()).parseDeferredProperties();
return downcast<StyleProperties>(m_properties.get());
}
MutableStyleProperties& StyleRule::mutableProperties()
{
if (!is<MutableStyleProperties>(m_properties.get()))
m_properties = properties().mutableCopy();
return downcast<MutableStyleProperties>(m_properties.get());
}
Ref<StyleRule> StyleRule::createForSplitting(const Vector<const CSSSelector*>& selectors, Ref<StyleProperties>&& properties, bool hasDocumentSecurityOrigin)
{
ASSERT_WITH_SECURITY_IMPLICATION(!selectors.isEmpty());
auto selectorListArray = makeUniqueArray<CSSSelector>(selectors.size());
for (unsigned i = 0; i < selectors.size(); ++i)
new (NotNull, &selectorListArray[i]) CSSSelector(*selectors.at(i));
selectorListArray[selectors.size() - 1].setLastInSelectorList();
return StyleRule::create(WTFMove(properties), hasDocumentSecurityOrigin, CSSSelectorList(WTFMove(selectorListArray)));
}
Vector<RefPtr<StyleRule>> StyleRule::splitIntoMultipleRulesWithMaximumSelectorComponentCount(unsigned maxCount) const
{
ASSERT(selectorList().componentCount() > maxCount);
Vector<RefPtr<StyleRule>> rules;
Vector<const CSSSelector*> componentsSinceLastSplit;
for (const CSSSelector* selector = selectorList().first(); selector; selector = CSSSelectorList::next(selector)) {
Vector<const CSSSelector*, 8> componentsInThisSelector;
for (const CSSSelector* component = selector; component; component = component->tagHistory())
componentsInThisSelector.append(component);
if (componentsInThisSelector.size() + componentsSinceLastSplit.size() > maxCount && !componentsSinceLastSplit.isEmpty()) {
rules.append(createForSplitting(componentsSinceLastSplit, const_cast<StyleProperties&>(properties()), hasDocumentSecurityOrigin()));
componentsSinceLastSplit.clear();
}
componentsSinceLastSplit.appendVector(componentsInThisSelector);
}
if (!componentsSinceLastSplit.isEmpty())
rules.append(createForSplitting(componentsSinceLastSplit, const_cast<StyleProperties&>(properties()), hasDocumentSecurityOrigin()));
return rules;
}
StyleRulePage::StyleRulePage(Ref<StyleProperties>&& properties, CSSSelectorList&& selectors)
: StyleRuleBase(StyleRuleType::Page)
, m_properties(WTFMove(properties))
, m_selectorList(WTFMove(selectors))
{
}
StyleRulePage::StyleRulePage(const StyleRulePage& o)
: StyleRuleBase(o)
, m_properties(o.m_properties->mutableCopy())
, m_selectorList(o.m_selectorList)
{
}
StyleRulePage::~StyleRulePage() = default;
MutableStyleProperties& StyleRulePage::mutableProperties()
{
if (!is<MutableStyleProperties>(m_properties.get()))
m_properties = m_properties->mutableCopy();
return downcast<MutableStyleProperties>(m_properties.get());
}
StyleRuleFontFace::StyleRuleFontFace(Ref<StyleProperties>&& properties)
: StyleRuleBase(StyleRuleType::FontFace)
, m_properties(WTFMove(properties))
{
}
StyleRuleFontFace::StyleRuleFontFace(const StyleRuleFontFace& o)
: StyleRuleBase(o)
, m_properties(o.m_properties->mutableCopy())
{
}
StyleRuleFontFace::~StyleRuleFontFace() = default;
MutableStyleProperties& StyleRuleFontFace::mutableProperties()
{
if (!is<MutableStyleProperties>(m_properties.get()))
m_properties = m_properties->mutableCopy();
return downcast<MutableStyleProperties>(m_properties.get());
}
DeferredStyleGroupRuleList::DeferredStyleGroupRuleList(const CSSParserTokenRange& range, CSSDeferredParser& parser)
: m_parser(parser)
{
size_t length = range.end() - range.begin();
m_tokens.reserveCapacity(length);
m_tokens.append(range.begin(), length);
}
void DeferredStyleGroupRuleList::parseDeferredRules(Vector<RefPtr<StyleRuleBase>>& childRules)
{
m_parser->parseRuleList(m_tokens, childRules);
}
void DeferredStyleGroupRuleList::parseDeferredKeyframes(StyleRuleKeyframes& keyframesRule)
{
m_parser->parseKeyframeList(m_tokens, keyframesRule);
}
StyleRuleGroup::StyleRuleGroup(StyleRuleType type, Vector<RefPtr<StyleRuleBase>>& adoptRule)
: StyleRuleBase(type)
{
m_childRules.swap(adoptRule);
}
StyleRuleGroup::StyleRuleGroup(StyleRuleType type, std::unique_ptr<DeferredStyleGroupRuleList>&& deferredRules)
: StyleRuleBase(type)
, m_deferredRules(WTFMove(deferredRules))
{
}
StyleRuleGroup::StyleRuleGroup(const StyleRuleGroup& o)
: StyleRuleBase(o)
{
m_childRules.reserveInitialCapacity(o.childRules().size());
for (auto& childRule : o.childRules())
m_childRules.uncheckedAppend(childRule->copy());
}
const Vector<RefPtr<StyleRuleBase>>& StyleRuleGroup::childRules() const
{
parseDeferredRulesIfNeeded();
return m_childRules;
}
void StyleRuleGroup::wrapperInsertRule(unsigned index, Ref<StyleRuleBase>&& rule)
{
parseDeferredRulesIfNeeded();
m_childRules.insert(index, WTFMove(rule));
}
void StyleRuleGroup::wrapperRemoveRule(unsigned index)
{
parseDeferredRulesIfNeeded();
m_childRules.remove(index);
}
void StyleRuleGroup::parseDeferredRulesIfNeeded() const
{
if (!m_deferredRules)
return;
m_deferredRules->parseDeferredRules(m_childRules);
m_deferredRules = nullptr;
}
StyleRuleMedia::StyleRuleMedia(Ref<MediaQuerySet>&& media, Vector<RefPtr<StyleRuleBase>>& adoptRules)
: StyleRuleGroup(StyleRuleType::Media, adoptRules)
, m_mediaQueries(WTFMove(media))
{
}
StyleRuleMedia::StyleRuleMedia(Ref<MediaQuerySet>&& media, std::unique_ptr<DeferredStyleGroupRuleList>&& deferredRules)
: StyleRuleGroup(StyleRuleType::Media, WTFMove(deferredRules))
, m_mediaQueries(WTFMove(media))
{
}
StyleRuleMedia::StyleRuleMedia(const StyleRuleMedia& o)
: StyleRuleGroup(o)
{
if (o.m_mediaQueries)
m_mediaQueries = o.m_mediaQueries->copy();
}
StyleRuleSupports::StyleRuleSupports(const String& conditionText, bool conditionIsSupported, Vector<RefPtr<StyleRuleBase>>& adoptRules)
: StyleRuleGroup(StyleRuleType::Supports, adoptRules)
, m_conditionText(conditionText)
, m_conditionIsSupported(conditionIsSupported)
{
}
StyleRuleSupports::StyleRuleSupports(const String& conditionText, bool conditionIsSupported, std::unique_ptr<DeferredStyleGroupRuleList>&& deferredRules)
: StyleRuleGroup(StyleRuleType::Supports, WTFMove(deferredRules))
, m_conditionText(conditionText)
, m_conditionIsSupported(conditionIsSupported)
{
}
StyleRuleSupports::StyleRuleSupports(const StyleRuleSupports& o)
: StyleRuleGroup(o)
, m_conditionText(o.m_conditionText)
, m_conditionIsSupported(o.m_conditionIsSupported)
{
}
StyleRuleCharset::StyleRuleCharset()
: StyleRuleBase(StyleRuleType::Charset)
{
}
StyleRuleCharset::StyleRuleCharset(const StyleRuleCharset& o)
: StyleRuleBase(o)
{
}
StyleRuleCharset::~StyleRuleCharset() = default;
StyleRuleNamespace::StyleRuleNamespace(AtomString prefix, AtomString uri)
: StyleRuleBase(StyleRuleType::Namespace)
, m_prefix(prefix)
, m_uri(uri)
{
}
StyleRuleNamespace::StyleRuleNamespace(const StyleRuleNamespace& o)
: StyleRuleBase(o)
, m_prefix(o.m_prefix)
, m_uri(o.m_uri)
{
}
StyleRuleNamespace::~StyleRuleNamespace() = default;
} // namespace WebCore