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#include "private/qdeclarativefastproperties_p.h"

#include <private/qdeclarativeitem_p.h>

QT_BEGIN_NAMESPACE

// Adding entries to the QDeclarativeFastProperties class allows the QML 

// binding optimizer to bypass Qt's meta system and read and, more 

// importantly, subscribe to properties directly.  Any property that is

// primarily read from bindings is a candidate for inclusion as a fast 

// property.

QDeclarativeFastProperties::QDeclarativeFastProperties()

{

    add(&QDeclarativeItem::staticMetaObject, QDeclarativeItem::staticMetaObject.indexOfProperty("parent"),

        QDeclarativeItemPrivate::parentProperty);

}

int QDeclarativeFastProperties::accessorIndexForProperty(const QMetaObject *metaObject, int propertyIndex)

{

    Q_ASSERT(metaObject);

    Q_ASSERT(propertyIndex >= 0);

    // Find the "real" metaObject

    while (metaObject->propertyOffset() > propertyIndex) 

        metaObject = metaObject->superClass();

    QHash<QPair<const QMetaObject *, int>, int>::Iterator iter = 

        m_index.find(qMakePair(metaObject, propertyIndex));

    if (iter != m_index.end())

        return *iter;

    else

        return -1;

}

void QDeclarativeFastProperties::add(const QMetaObject *metaObject, int propertyIndex, Accessor accessor)

{

    Q_ASSERT(metaObject);

    Q_ASSERT(propertyIndex >= 0);

    // Find the "real" metaObject

    while (metaObject->propertyOffset() > propertyIndex) 

        metaObject = metaObject->superClass();

    QPair<const QMetaObject *, int> data = qMakePair(metaObject, propertyIndex);

    int accessorIndex = m_accessors.count();

    m_accessors.append(accessor);

    m_index.insert(data, accessorIndex);

}

QT_END_NAMESPACE