/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
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** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
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** 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
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
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****************************************************************************/

#include <qml.h>
#include "qmlbindablevalue.h"
#include "qmlbindablevalue_p.h"
#include <qmlcontext.h>
#include <qmlinfo.h>
#include <QVariant>
#include <qfxperf.h>
#include <QtCore/qdebug.h>

QT_BEGIN_NAMESPACE

DEFINE_BOOL_CONFIG_OPTION(scriptWarnings, QML_SCRIPT_WARNINGS);

QmlBindableValuePrivate::QmlBindableValuePrivate()
: inited(false), updating(false), mePtr(0)
{
}

QML_DEFINE_NOCREATE_TYPE(QmlBindableValue);
QmlBindableValue::QmlBindableValue(void *data, QmlRefCount *rc, QObject *obj, QObject *parent)
: QmlPropertyValueSource(*new QmlBindableValuePrivate, parent), QmlExpression(QmlContext::activeContext(), data, rc, obj)
{
}

QmlBindableValue::QmlBindableValue(const QString &str, QObject *obj, QObject *parent)
: QmlPropertyValueSource(*new QmlBindableValuePrivate, parent), QmlExpression(QmlContext::activeContext(), str, obj)
{
}

QmlBindableValue::~QmlBindableValue()
{
    Q_D(QmlBindableValue);
    if(d->mePtr)
        *(d->mePtr) = 0;
}

void QmlBindableValue::setTarget(const QmlMetaProperty &prop)
{
    Q_D(QmlBindableValue);
    d->property = prop;

    update();
}

QmlMetaProperty QmlBindableValue::property() const 
{
   Q_D(const QmlBindableValue);
   return d->property; 
}

void QmlBindableValue::init()
{
    Q_D(QmlBindableValue);

    if (d->inited)
        return;
    d->inited = true;
    update();
}

void QmlBindableValue::setExpression(const QString &expr)
{
    QmlExpression::setExpression(expr);
    update();
}

Q_DECLARE_METATYPE(QList<QObject *>);
void QmlBindableValue::update()
{
    Q_D(QmlBindableValue);

#ifdef Q_ENABLE_PERFORMANCE_LOG
    QFxPerfTimer<QFxPerf::BindableValueUpdate> bu;
#endif
    if (!d->inited)
        return;

    if (!d->updating) {
        d->updating = true;

        if (d->property.propertyCategory() == QmlMetaProperty::Bindable) {

            int idx = d->property.coreIndex();
            Q_ASSERT(idx != -1);

            void *a[1];
            QmlBindableValue *t = this;
            a[0] = (void *)&t;
            QMetaObject::metacall(d->property.object(), 
                                  QMetaObject::WriteProperty,
                                  idx, a);

        } else {

            QVariant value = this->value();
            if ((uint)d->property.propertyType() >= QVariant::UserType &&
                value.type() == QVariant::String) {
                QmlMetaType::StringConverter con = QmlMetaType::customStringConverter(d->property.propertyType());
                if (con)
                    value = con(value.toString());
            }

            if (d->property.propertyType() == QVariant::Url && 
                value.canConvert(QVariant::String) && !value.isNull()) 
                value.setValue(context()->resolvedUrl(QUrl(value.toString())));

            d->property.write(value);
        }

        d->updating = false;
    } else {
        qmlInfo(d->property.object()) << "Binding loop detected for property" << d->property.name();
    }
}

void QmlBindableValue::valueChanged()
{
    update();
}

QT_END_NAMESPACE