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