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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004, 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.
*/
#ifndef StylePropertySet_h
#define StylePropertySet_h
#include "CSSPropertyNames.h"
#include "core/css/CSSParserMode.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/css/CSSProperty.h"
#include "core/css/CSSVariablesIterator.h"
#include "core/css/PropertySetCSSStyleDeclaration.h"
#include "wtf/ListHashSet.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
class CSSRule;
class CSSStyleDeclaration;
class Element;
class ImmutableStylePropertySet;
class KURL;
class MutableStylePropertySet;
class StylePropertyShorthand;
class StyleSheetContents;
class StylePropertySet : public RefCounted<StylePropertySet> {
friend class PropertyReference;
public:
// Override RefCounted's deref() to ensure operator delete is called on
// the appropriate subclass type.
void deref();
class PropertyReference {
public:
PropertyReference(const StylePropertySet& propertySet, unsigned index)
: m_propertySet(propertySet)
, m_index(index)
{
}
CSSPropertyID id() const { return static_cast<CSSPropertyID>(propertyMetadata().m_propertyID); }
CSSPropertyID shorthandID() const { return propertyMetadata().shorthandID(); }
bool isImportant() const { return propertyMetadata().m_important; }
bool isInherited() const { return propertyMetadata().m_inherited; }
bool isImplicit() const { return propertyMetadata().m_implicit; }
String cssName() const;
String cssText() const;
const CSSValue* value() const { return propertyValue(); }
// FIXME: We should try to remove this mutable overload.
CSSValue* value() { return const_cast<CSSValue*>(propertyValue()); }
// FIXME: Remove this.
CSSProperty toCSSProperty() const { return CSSProperty(propertyMetadata(), const_cast<CSSValue*>(propertyValue())); }
const StylePropertyMetadata& propertyMetadata() const;
private:
const CSSValue* propertyValue() const;
const StylePropertySet& m_propertySet;
unsigned m_index;
};
unsigned propertyCount() const;
bool isEmpty() const;
PropertyReference propertyAt(unsigned index) const { return PropertyReference(*this, index); }
int findPropertyIndex(CSSPropertyID) const;
size_t findVariableIndex(const AtomicString& name) const;
PassRefPtr<CSSValue> getPropertyCSSValue(CSSPropertyID) const;
String getPropertyValue(CSSPropertyID) const;
unsigned variableCount() const;
String variableValue(const AtomicString& name) const;
bool propertyIsImportant(CSSPropertyID) const;
CSSPropertyID getPropertyShorthand(CSSPropertyID) const;
bool isPropertyImplicit(CSSPropertyID) const;
PassRefPtr<MutableStylePropertySet> copyBlockProperties() const;
CSSParserMode cssParserMode() const { return static_cast<CSSParserMode>(m_cssParserMode); }
void addSubresourceStyleURLs(ListHashSet<KURL>&, StyleSheetContents* contextStyleSheet) const;
PassRefPtr<MutableStylePropertySet> mutableCopy() const;
PassRefPtr<ImmutableStylePropertySet> immutableCopyIfNeeded() const;
PassRefPtr<MutableStylePropertySet> copyPropertiesInSet(const Vector<CSSPropertyID>&) const;
String asText() const;
bool isMutable() const { return m_isMutable; }
bool hasCSSOMWrapper() const;
bool hasFailedOrCanceledSubresources() const;
static unsigned averageSizeInBytes();
#ifndef NDEBUG
void showStyle();
#endif
bool propertyMatches(CSSPropertyID, const CSSValue*) const;
protected:
enum { MaxArraySize = (1 << 28) - 1 };
StylePropertySet(CSSParserMode cssParserMode)
: m_cssParserMode(cssParserMode)
, m_isMutable(true)
, m_arraySize(0)
{ }
StylePropertySet(CSSParserMode cssParserMode, unsigned immutableArraySize)
: m_cssParserMode(cssParserMode)
, m_isMutable(false)
, m_arraySize(std::min(immutableArraySize, unsigned(MaxArraySize)))
{ }
unsigned m_cssParserMode : 3;
mutable unsigned m_isMutable : 1;
unsigned m_arraySize : 28;
friend class PropertySetCSSStyleDeclaration;
};
class ImmutableStylePropertySet : public StylePropertySet {
public:
~ImmutableStylePropertySet();
static PassRefPtr<ImmutableStylePropertySet> create(const CSSProperty* properties, unsigned count, CSSParserMode);
unsigned propertyCount() const { return m_arraySize; }
const CSSValue** valueArray() const;
const StylePropertyMetadata* metadataArray() const;
void* m_storage;
private:
ImmutableStylePropertySet(const CSSProperty*, unsigned count, CSSParserMode);
};
inline const CSSValue** ImmutableStylePropertySet::valueArray() const
{
return reinterpret_cast<const CSSValue**>(const_cast<const void**>(&(this->m_storage)));
}
inline const StylePropertyMetadata* ImmutableStylePropertySet::metadataArray() const
{
return reinterpret_cast<const StylePropertyMetadata*>(&reinterpret_cast<const char*>(&(this->m_storage))[m_arraySize * sizeof(CSSValue*)]);
}
class MutableStylePropertySet : public StylePropertySet {
public:
~MutableStylePropertySet() { }
static PassRefPtr<MutableStylePropertySet> create(CSSParserMode = HTMLQuirksMode);
static PassRefPtr<MutableStylePropertySet> create(const CSSProperty* properties, unsigned count);
unsigned propertyCount() const { return m_propertyVector.size(); }
PropertySetCSSStyleDeclaration* cssStyleDeclaration();
void addParsedProperties(const Vector<CSSProperty, 256>&);
void addParsedProperty(const CSSProperty&);
// These expand shorthand properties into multiple properties.
bool setProperty(CSSPropertyID, const String& value, bool important = false, StyleSheetContents* contextStyleSheet = 0);
void setProperty(CSSPropertyID, PassRefPtr<CSSValue>, bool important = false);
// These do not. FIXME: This is too messy, we can do better.
bool setProperty(CSSPropertyID, CSSValueID identifier, bool important = false);
bool setProperty(CSSPropertyID, CSSPropertyID identifier, bool important = false);
void appendPrefixingVariantProperty(const CSSProperty&);
void setPrefixingVariantProperty(const CSSProperty&);
void setProperty(const CSSProperty&, CSSProperty* slot = 0);
bool setVariableValue(const AtomicString& name, const String& value, bool important = false);
bool removeProperty(CSSPropertyID, String* returnText = 0);
void removePrefixedOrUnprefixedProperty(CSSPropertyID);
void removeBlockProperties();
bool removePropertiesInSet(const CSSPropertyID* set, unsigned length);
void removeEquivalentProperties(const StylePropertySet*);
void removeEquivalentProperties(const CSSStyleDeclaration*);
bool removeVariable(const AtomicString& name);
bool clearVariables();
PassRefPtr<CSSVariablesIterator> variablesIterator() { return VariablesIterator::create(this); }
void mergeAndOverrideOnConflict(const StylePropertySet*);
void clear();
void parseDeclaration(const String& styleDeclaration, StyleSheetContents* contextStyleSheet);
CSSStyleDeclaration* ensureCSSStyleDeclaration();
CSSStyleDeclaration* ensureInlineCSSStyleDeclaration(Element* parentElement);
Vector<CSSProperty, 4> m_propertyVector;
private:
class VariablesIterator : public CSSVariablesIterator {
public:
virtual ~VariablesIterator() { }
static PassRefPtr<VariablesIterator> create(MutableStylePropertySet*);
private:
explicit VariablesIterator(MutableStylePropertySet* propertySet) : m_propertySet(propertySet) { }
void takeRemainingNames(Vector<AtomicString>& remainingNames) { m_remainingNames.swap(remainingNames); }
virtual void advance() OVERRIDE;
virtual bool atEnd() const OVERRIDE { return m_remainingNames.isEmpty(); }
virtual AtomicString name() const OVERRIDE { return m_remainingNames.last(); }
virtual String value() const OVERRIDE { return m_propertySet->variableValue(name()); }
virtual void addedVariable(const AtomicString& name) OVERRIDE;
virtual void removedVariable(const AtomicString& name) OVERRIDE;
virtual void clearedVariables() OVERRIDE;
RefPtr<MutableStylePropertySet> m_propertySet;
Vector<AtomicString> m_remainingNames;
Vector<AtomicString> m_newNames;
};
explicit MutableStylePropertySet(CSSParserMode);
explicit MutableStylePropertySet(const StylePropertySet&);
MutableStylePropertySet(const CSSProperty* properties, unsigned count);
bool removeShorthandProperty(CSSPropertyID);
CSSProperty* findCSSPropertyWithID(CSSPropertyID);
OwnPtr<PropertySetCSSStyleDeclaration> m_cssomWrapper;
friend class StylePropertySet;
};
inline const StylePropertyMetadata& StylePropertySet::PropertyReference::propertyMetadata() const
{
if (m_propertySet.isMutable())
return static_cast<const MutableStylePropertySet&>(m_propertySet).m_propertyVector.at(m_index).metadata();
return static_cast<const ImmutableStylePropertySet&>(m_propertySet).metadataArray()[m_index];
}
inline const CSSValue* StylePropertySet::PropertyReference::propertyValue() const
{
if (m_propertySet.isMutable())
return static_cast<const MutableStylePropertySet&>(m_propertySet).m_propertyVector.at(m_index).value();
return static_cast<const ImmutableStylePropertySet&>(m_propertySet).valueArray()[m_index];
}
inline unsigned StylePropertySet::propertyCount() const
{
if (m_isMutable)
return static_cast<const MutableStylePropertySet*>(this)->m_propertyVector.size();
return m_arraySize;
}
inline bool StylePropertySet::isEmpty() const
{
return !propertyCount();
}
inline void StylePropertySet::deref()
{
if (!derefBase())
return;
if (m_isMutable)
delete static_cast<MutableStylePropertySet*>(this);
else
delete static_cast<ImmutableStylePropertySet*>(this);
}
} // namespace WebCore
#endif // StylePropertySet_h