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#include "qmlbindingoptimizations_p.h"
#include <private/qmlcontext_p.h>

QT_BEGIN_NAMESPACE


QmlBindingIdOptimization::QmlBindingIdOptimization(QObject *object, 
                                                   int propertyIdx,
                                                   QmlContext *context, 
                                                   int id)
: m_prev(0), m_next(0), m_object(object), m_propertyIdx(propertyIdx), m_id(id)
{
    QmlAbstractExpression::setContext(context);
}

void QmlBindingIdOptimization::setEnabled(bool e)
{
    if (e) {
        addToObject(m_object);
        update();
    } else {
        removeFromObject();
    }
}

int QmlBindingIdOptimization::propertyIndex()
{
    return m_propertyIdx;
}

void QmlBindingIdOptimization::update()
{
    QmlContextPrivate *ctxtPriv = 
        static_cast<QmlContextPrivate *>(QObjectPrivate::get(context()));

    if (ctxtPriv) {

        if (!m_prev) {
            m_next = ctxtPriv->idValues[m_id].bindings;
            if (m_next) m_next->m_prev = &m_next;

            m_prev = &ctxtPriv->idValues[m_id].bindings;
            ctxtPriv->idValues[m_id].bindings = this;
        }

        QObject *o = ctxtPriv->idValues[m_id].data();
        void *a[] = { &o, 0 };
        QMetaObject::metacall(m_object, QMetaObject::WriteProperty, 
                              m_propertyIdx, a);
    } 
}

void QmlBindingIdOptimization::reset()
{
    if (m_prev) {
        *m_prev = m_next;
        if (m_next) m_next->m_prev = m_prev;
        m_next = 0;
        m_prev = 0;
    }

    QObject *o = 0;
    void *a[] = { &o, 0 };
    QMetaObject::metacall(m_object, QMetaObject::WriteProperty, 
                          m_propertyIdx, a);
}

QT_END_NAMESPACE