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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Peter Kelly (pmk@post.com)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2010, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
*
* 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 ElementAttributeData_h
#define ElementAttributeData_h
#include "Attribute.h"
#include "SpaceSplitString.h"
#include "StylePropertySet.h"
#include <wtf/NotFound.h>
namespace WebCore {
class Element;
class ImmutableElementAttributeData;
class MutableElementAttributeData;
class ElementAttributeData : public RefCounted<ElementAttributeData> {
WTF_MAKE_FAST_ALLOCATED;
public:
static PassRefPtr<ElementAttributeData> create();
static PassRefPtr<ElementAttributeData> createImmutable(const Vector<Attribute>&);
// Override RefCounted's deref() to ensure operator delete is called on
// the appropriate subclass type.
void deref();
void clearClass() const { m_classNames.clear(); }
void setClass(const AtomicString& className, bool shouldFoldCase) const { m_classNames.set(className, shouldFoldCase); }
const SpaceSplitString& classNames() const { return m_classNames; }
const AtomicString& idForStyleResolution() const { return m_idForStyleResolution; }
void setIdForStyleResolution(const AtomicString& newId) const { m_idForStyleResolution = newId; }
const StylePropertySet* inlineStyle() const { return m_inlineStyle.get(); }
const StylePropertySet* presentationAttributeStyle() const;
void setPresentationAttributeStyle(PassRefPtr<StylePropertySet>) const;
size_t length() const;
bool isEmpty() const { return !length(); }
// Internal interface.
const Attribute* attributeItem(unsigned index) const;
const Attribute* getAttributeItem(const QualifiedName&) const;
Attribute* attributeItem(unsigned index);
Attribute* getAttributeItem(const QualifiedName&);
size_t getAttributeItemIndex(const QualifiedName&) const;
size_t getAttributeItemIndex(const AtomicString& name, bool shouldIgnoreAttributeCase) const;
// These functions do no error checking.
void addAttribute(const Attribute&);
void removeAttribute(size_t index);
bool hasID() const { return !m_idForStyleResolution.isNull(); }
bool hasClass() const { return !m_classNames.isNull(); }
bool isEquivalent(const ElementAttributeData* other) const;
void reportMemoryUsage(MemoryObjectInfo*) const;
bool isMutable() const { return m_isMutable; }
const Attribute* immutableAttributeArray() const;
protected:
ElementAttributeData()
: m_isMutable(true)
, m_arraySize(0)
, m_presentationAttributeStyleIsDirty(false)
, m_styleAttributeIsDirty(false)
#if ENABLE(SVG)
, m_animatedSVGAttributesAreDirty(false)
#endif
{ }
ElementAttributeData(unsigned arraySize)
: m_isMutable(false)
, m_arraySize(arraySize)
, m_presentationAttributeStyleIsDirty(false)
, m_styleAttributeIsDirty(false)
#if ENABLE(SVG)
, m_animatedSVGAttributesAreDirty(false)
#endif
{ }
ElementAttributeData(const ElementAttributeData&, bool isMutable);
unsigned m_isMutable : 1;
unsigned m_arraySize : 28;
mutable unsigned m_presentationAttributeStyleIsDirty : 1;
mutable unsigned m_styleAttributeIsDirty : 1;
#if ENABLE(SVG)
mutable unsigned m_animatedSVGAttributesAreDirty : 1;
#endif
mutable RefPtr<StylePropertySet> m_inlineStyle;
mutable SpaceSplitString m_classNames;
mutable AtomicString m_idForStyleResolution;
private:
friend class Element;
friend class StyledElement;
friend class ImmutableElementAttributeData;
friend class MutableElementAttributeData;
#if ENABLE(SVG)
friend class SVGElement;
#endif
Attribute* getAttributeItem(const AtomicString& name, bool shouldIgnoreAttributeCase);
const Attribute* getAttributeItem(const AtomicString& name, bool shouldIgnoreAttributeCase) const;
size_t getAttributeItemIndexSlowCase(const AtomicString& name, bool shouldIgnoreAttributeCase) const;
PassRefPtr<ElementAttributeData> makeMutableCopy() const;
PassRefPtr<ElementAttributeData> makeImmutableCopy() const;
Vector<Attribute, 4>& mutableAttributeVector();
const Vector<Attribute, 4>& mutableAttributeVector() const;
};
class ImmutableElementAttributeData : public ElementAttributeData {
public:
ImmutableElementAttributeData(const Vector<Attribute>&);
ImmutableElementAttributeData(const MutableElementAttributeData&);
~ImmutableElementAttributeData();
void* m_attributeArray;
};
class MutableElementAttributeData : public ElementAttributeData {
public:
MutableElementAttributeData() { }
MutableElementAttributeData(const ImmutableElementAttributeData&);
MutableElementAttributeData(const MutableElementAttributeData&);
mutable RefPtr<StylePropertySet> m_presentationAttributeStyle;
Vector<Attribute, 4> m_attributeVector;
};
inline Vector<Attribute, 4>& ElementAttributeData::mutableAttributeVector()
{
ASSERT(m_isMutable);
return static_cast<MutableElementAttributeData*>(this)->m_attributeVector;
}
inline const Vector<Attribute, 4>& ElementAttributeData::mutableAttributeVector() const
{
ASSERT(m_isMutable);
return static_cast<const MutableElementAttributeData*>(this)->m_attributeVector;
}
inline const Attribute* ElementAttributeData::immutableAttributeArray() const
{
ASSERT(!m_isMutable);
return reinterpret_cast<const Attribute*>(&static_cast<const ImmutableElementAttributeData*>(this)->m_attributeArray);
}
inline size_t ElementAttributeData::length() const
{
if (isMutable())
return mutableAttributeVector().size();
return m_arraySize;
}
inline const StylePropertySet* ElementAttributeData::presentationAttributeStyle() const
{
if (!m_isMutable)
return 0;
return static_cast<const MutableElementAttributeData*>(this)->m_presentationAttributeStyle.get();
}
inline void ElementAttributeData::setPresentationAttributeStyle(PassRefPtr<StylePropertySet> style) const
{
ASSERT(m_isMutable);
static_cast<const MutableElementAttributeData*>(this)->m_presentationAttributeStyle = style;
}
inline Attribute* ElementAttributeData::getAttributeItem(const AtomicString& name, bool shouldIgnoreAttributeCase)
{
size_t index = getAttributeItemIndex(name, shouldIgnoreAttributeCase);
if (index != notFound)
return attributeItem(index);
return 0;
}
inline const Attribute* ElementAttributeData::getAttributeItem(const AtomicString& name, bool shouldIgnoreAttributeCase) const
{
size_t index = getAttributeItemIndex(name, shouldIgnoreAttributeCase);
if (index != notFound)
return attributeItem(index);
return 0;
}
inline size_t ElementAttributeData::getAttributeItemIndex(const QualifiedName& name) const
{
for (unsigned i = 0; i < length(); ++i) {
if (attributeItem(i)->name().matches(name))
return i;
}
return notFound;
}
// We use a boolean parameter instead of calling shouldIgnoreAttributeCase so that the caller
// can tune the behavior (hasAttribute is case sensitive whereas getAttribute is not).
inline size_t ElementAttributeData::getAttributeItemIndex(const AtomicString& name, bool shouldIgnoreAttributeCase) const
{
unsigned len = length();
bool doSlowCheck = shouldIgnoreAttributeCase;
// Optimize for the case where the attribute exists and its name exactly matches.
for (unsigned i = 0; i < len; ++i) {
const Attribute* attribute = attributeItem(i);
if (!attribute->name().hasPrefix()) {
if (name == attribute->localName())
return i;
} else
doSlowCheck = true;
}
if (doSlowCheck)
return getAttributeItemIndexSlowCase(name, shouldIgnoreAttributeCase);
return notFound;
}
inline const Attribute* ElementAttributeData::getAttributeItem(const QualifiedName& name) const
{
for (unsigned i = 0; i < length(); ++i) {
if (attributeItem(i)->name().matches(name))
return attributeItem(i);
}
return 0;
}
inline Attribute* ElementAttributeData::getAttributeItem(const QualifiedName& name)
{
for (unsigned i = 0; i < length(); ++i) {
if (attributeItem(i)->name().matches(name))
return attributeItem(i);
}
return 0;
}
inline const Attribute* ElementAttributeData::attributeItem(unsigned index) const
{
ASSERT(index < length());
if (m_isMutable)
return &mutableAttributeVector().at(index);
return &immutableAttributeArray()[index];
}
inline Attribute* ElementAttributeData::attributeItem(unsigned index)
{
ASSERT(index < length());
return &mutableAttributeVector().at(index);
}
inline void ElementAttributeData::deref()
{
if (!derefBase())
return;
if (m_isMutable)
delete static_cast<MutableElementAttributeData*>(this);
else
delete static_cast<ImmutableElementAttributeData*>(this);
}
}
#endif // ElementAttributeData_h
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