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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 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 Attr;
class Element;
class MemoryObjectInfo;
enum SynchronizationOfLazyAttribute { NotInSynchronizationOfLazyAttribute, InSynchronizationOfLazyAttribute };
class ElementAttributeData {
WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<ElementAttributeData> create() { return adoptPtr(new ElementAttributeData); }
static PassOwnPtr<ElementAttributeData> createImmutable(const Vector<Attribute>&);
~ElementAttributeData();
void clearClass() { 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_inlineStyleDecl.get(); }
StylePropertySet* inlineStyle() { return m_inlineStyleDecl.get(); }
StylePropertySet* ensureInlineStyle(StyledElement*);
StylePropertySet* ensureMutableInlineStyle(StyledElement*);
void updateInlineStyleAvoidingMutation(StyledElement*, const String& text) const;
void destroyInlineStyle(StyledElement*) const;
const StylePropertySet* attributeStyle() const { return m_attributeStyle.get(); }
void setAttributeStyle(PassRefPtr<StylePropertySet> style) const { m_attributeStyle = style; }
size_t length() const;
bool isEmpty() const { return !length(); }
PassRefPtr<Attr> getAttributeNode(const String&, bool shouldIgnoreAttributeCase, Element*) const;
PassRefPtr<Attr> getAttributeNode(const QualifiedName&, Element*) const;
// 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&, Element*, SynchronizationOfLazyAttribute = NotInSynchronizationOfLazyAttribute);
void removeAttribute(size_t index, Element*, SynchronizationOfLazyAttribute = NotInSynchronizationOfLazyAttribute);
PassRefPtr<Attr> takeAttribute(size_t index, Element*);
bool hasID() const { return !m_idForStyleResolution.isNull(); }
bool hasClass() const { return !m_classNames.isNull(); }
bool isEquivalent(const ElementAttributeData* other) const;
void setAttr(Element*, const QualifiedName&, Attr*) const;
void removeAttr(Element*, const QualifiedName&) const;
PassRefPtr<Attr> attrIfExists(Element*, const QualifiedName&) const;
PassRefPtr<Attr> ensureAttr(Element*, const QualifiedName&) const;
void detachAttrObjectsFromElement(Element*) const;
void reportMemoryUsage(MemoryObjectInfo*) const;
private:
friend class Element;
friend class HTMLConstructionSite;
ElementAttributeData();
ElementAttributeData(const ElementAttributeData&);
ElementAttributeData(const Vector<Attribute>&);
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;
void cloneDataFrom(const ElementAttributeData& sourceData, const Element& sourceElement, Element& targetElement);
void clearAttributes(Element*);
void replaceAttribute(size_t index, const Attribute&, Element*);
bool isMutable() const { return m_isMutable; }
PassOwnPtr<ElementAttributeData> makeMutable() const { return adoptPtr(new ElementAttributeData(*this)); }
mutable RefPtr<StylePropertySet> m_inlineStyleDecl;
mutable RefPtr<StylePropertySet> m_attributeStyle;
mutable SpaceSplitString m_classNames;
mutable AtomicString m_idForStyleResolution;
unsigned m_isMutable : 1;
unsigned m_arraySize : 31;
union {
Vector<Attribute, 4>* m_mutableAttributeVector;
void* m_attributes;
};
};
inline size_t ElementAttributeData::length() const
{
if (isMutable())
return m_mutableAttributeVector->size();
return m_arraySize;
}
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 (isMutable())
return &m_mutableAttributeVector->at(index);
const Attribute* buffer = reinterpret_cast<const Attribute*>(&m_attributes);
return &buffer[index];
}
inline Attribute* ElementAttributeData::attributeItem(unsigned index)
{
ASSERT(isMutable());
ASSERT(index < length());
return &m_mutableAttributeVector->at(index);
}
}
#endif // ElementAttributeData_h
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