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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QDECLARATIVEDATA_P_H
#define QDECLARATIVEDATA_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtScript/qscriptvalue.h>
#include <private/qobject_p.h>
#include "private/qdeclarativeguard_p.h"
QT_BEGIN_NAMESPACE
class QDeclarativeCompiledData;
class QDeclarativeAbstractBinding;
class QDeclarativeContext;
class QDeclarativePropertyCache;
class QDeclarativeContextData;
// This class is structured in such a way, that simply zero'ing it is the
// default state for elemental object allocations. This is crucial in the
// workings of the QDeclarativeInstruction::CreateSimpleObject instruction.
// Don't change anything here without first considering that case!
class Q_AUTOTEST_EXPORT QDeclarativeData : public QAbstractDeclarativeData
{
public:
QDeclarativeData()
: ownMemory(true), ownContext(false), indestructible(true), explicitIndestructibleSet(false),
context(0), outerContext(0), bindings(0), nextContextObject(0), prevContextObject(0), bindingBitsSize(0),
bindingBits(0), lineNumber(0), columnNumber(0), deferredComponent(0), deferredIdx(0),
attachedProperties(0), scriptValue(0), objectDataRefCount(0), propertyCache(0), guards(0) {
init();
}
static inline void init() {
QAbstractDeclarativeData::destroyed = destroyed;
QAbstractDeclarativeData::parentChanged = parentChanged;
}
static void destroyed(QAbstractDeclarativeData *, QObject *);
static void parentChanged(QAbstractDeclarativeData *, QObject *, QObject *);
void destroyed(QObject *);
void parentChanged(QObject *, QObject *);
void setImplicitDestructible() {
if (!explicitIndestructibleSet) indestructible = false;
}
quint32 ownMemory:1;
quint32 ownContext:1;
quint32 indestructible:1;
quint32 explicitIndestructibleSet:1;
quint32 dummy:28;
// The context that created the C++ object
QDeclarativeContextData *context;
// The outermost context in which this object lives
QDeclarativeContextData *outerContext;
QDeclarativeAbstractBinding *bindings;
// Linked list for QDeclarativeContext::contextObjects
QDeclarativeData *nextContextObject;
QDeclarativeData**prevContextObject;
int bindingBitsSize;
quint32 *bindingBits;
bool hasBindingBit(int) const;
void clearBindingBit(int);
void setBindingBit(QObject *obj, int);
ushort lineNumber;
ushort columnNumber;
QDeclarativeCompiledData *deferredComponent; // Can't this be found from the context?
unsigned int deferredIdx;
QHash<int, QObject *> *attachedProperties;
// ### Can we make this QScriptValuePrivate so we incur no additional allocation
// cost?
QScriptValue *scriptValue;
quint32 objectDataRefCount;
QDeclarativePropertyCache *propertyCache;
QDeclarativeGuard<QObject> *guards;
static QDeclarativeData *get(const QObject *object, bool create = false) {
QObjectPrivate *priv = QObjectPrivate::get(const_cast<QObject *>(object));
if (priv->wasDeleted) {
Q_ASSERT(!create);
return 0;
} else if (priv->declarativeData) {
return static_cast<QDeclarativeData *>(priv->declarativeData);
} else if (create) {
priv->declarativeData = new QDeclarativeData;
return static_cast<QDeclarativeData *>(priv->declarativeData);
} else {
return 0;
}
}
};
template<class T>
void QDeclarativeGuard<T>::addGuard()
{
Q_ASSERT(!prev);
if (QObjectPrivate::get(o)->wasDeleted)
return;
QDeclarativeData *data = QDeclarativeData::get(o, true);
next = data->guards;
if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = &next;
data->guards = reinterpret_cast<QDeclarativeGuard<QObject> *>(this);
prev = &data->guards;
}
template<class T>
void QDeclarativeGuard<T>::remGuard()
{
Q_ASSERT(prev);
if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = prev;
*prev = next;
next = 0;
prev = 0;
}
QT_END_NAMESPACE
#endif // QDECLARATIVEDATA_P_H
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