/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtDeclarative module of the Qt Toolkit.

**

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** 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.

**

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** $QT_END_LICENSE$

**

****************************************************************************/

#include "private/qdeclarativelistmodelworkeragent_p.h"

#include "private/qdeclarativelistmodel_p_p.h"

#include "private/qdeclarativedata_p.h"

#include "private/qdeclarativeengine_p.h"

#include "qdeclarativeinfo.h"

#include <QtCore/qcoreevent.h>

#include <QtCore/qcoreapplication.h>

#include <QtCore/qdebug.h>

QT_BEGIN_NAMESPACE

void QDeclarativeListModelWorkerAgent::Data::clearChange() 

{ 

    changes.clear(); 

}

void QDeclarativeListModelWorkerAgent::Data::insertChange(int index, int count) 

{

    Change c = { Change::Inserted, index, count, 0 };

    changes << c;

}

void QDeclarativeListModelWorkerAgent::Data::removeChange(int index, int count) 

{

    Change c = { Change::Removed, index, count, 0 };

    changes << c;

}

void QDeclarativeListModelWorkerAgent::Data::moveChange(int index, int count, int to)

{

    Change c = { Change::Moved, index, count, to };

    changes << c;

}

void QDeclarativeListModelWorkerAgent::Data::changedChange(int index, int count)

{

    Change c = { Change::Changed, index, count, 0 };

    changes << c;

}

QDeclarativeListModelWorkerAgent::QDeclarativeListModelWorkerAgent(QDeclarativeListModel *model)

: m_engine(0), m_ref(1), m_orig(model), m_copy(new QDeclarativeListModel(true, this))

{

    m_copy->m_flat->m_roles = m_orig->m_flat->m_roles;

    m_copy->m_flat->m_strings = m_orig->m_flat->m_strings;

    m_copy->m_flat->m_values = m_orig->m_flat->m_values;

}

QDeclarativeListModelWorkerAgent::~QDeclarativeListModelWorkerAgent()

{

}

void QDeclarativeListModelWorkerAgent::setScriptEngine(QScriptEngine *eng)

{

    m_engine = eng;

    if (m_copy->m_flat)

        m_copy->m_flat->m_scriptEngine = eng;

}

QScriptEngine *QDeclarativeListModelWorkerAgent::scriptEngine() const

{

    return m_engine;

}

void QDeclarativeListModelWorkerAgent::addref()

{

    m_ref.ref();

}

void QDeclarativeListModelWorkerAgent::release()

{

    bool del = !m_ref.deref();

    if (del)

        delete this;

}

int QDeclarativeListModelWorkerAgent::count() const

{

    return m_copy->count();

}

void QDeclarativeListModelWorkerAgent::clear()

{

    data.clearChange();

    data.removeChange(0, m_copy->count());

    m_copy->clear();

}

void QDeclarativeListModelWorkerAgent::remove(int index)

{

    int count = m_copy->count();

    m_copy->remove(index);

    if (m_copy->count() != count)

        data.removeChange(index, 1);

}

void QDeclarativeListModelWorkerAgent::append(const QScriptValue &value)

{

    int count = m_copy->count();

    m_copy->append(value);

    if (m_copy->count() != count)

        data.insertChange(m_copy->count() - 1, 1);

}

void QDeclarativeListModelWorkerAgent::insert(int index, const QScriptValue &value)

{

    int count = m_copy->count();

    m_copy->insert(index, value);

    if (m_copy->count() != count)

        data.insertChange(index, 1);

}

QScriptValue QDeclarativeListModelWorkerAgent::get(int index) const

{

    return m_copy->get(index);

}

void QDeclarativeListModelWorkerAgent::set(int index, const QScriptValue &value)

{

    m_copy->set(index, value);

    data.changedChange(index, 1);

}

void QDeclarativeListModelWorkerAgent::setProperty(int index, const QString& property, const QVariant& value)

{

    m_copy->setProperty(index, property, value);

    data.changedChange(index, 1);

}

void QDeclarativeListModelWorkerAgent::move(int from, int to, int count)

{

    m_copy->move(from, to, count);

    data.moveChange(from, to, count);

}

void QDeclarativeListModelWorkerAgent::sync()

{

    Sync *s = new Sync;

    s->data = data;

    s->list = m_copy;

    data.changes.clear();

    QCoreApplication::postEvent(this, s);

}

bool QDeclarativeListModelWorkerAgent::event(QEvent *e)

{

    if (e->type() == QEvent::User) {

        Sync *s = static_cast<Sync *>(e);

        const QList<Change> &changes = s->data.changes;

        if (m_copy) {

            bool cc = m_copy->count() != s->list->count();

            FlatListModel *orig = m_orig->m_flat;

            FlatListModel *copy = s->list->m_flat;

            if (!orig || !copy) 

                return QObject::event(e);

            orig->m_roles = copy->m_roles;

            orig->m_strings = copy->m_strings;

            orig->m_values = copy->m_values;

            for (int ii = 0; ii < changes.count(); ++ii) {

                const Change &change = changes.at(ii);

                switch (change.type) {

                case Change::Inserted:

                    emit m_orig->itemsInserted(change.index, change.count);

                    break;

                case Change::Removed:

                    emit m_orig->itemsRemoved(change.index, change.count);

                    break;

                case Change::Moved:

                    emit m_orig->itemsMoved(change.index, change.to, change.count);

                    break;

                case Change::Changed:

                    emit m_orig->itemsMoved(change.index, change.to, change.count);

                    break;

                }

            }

            if (cc)

                emit m_orig->countChanged();

        }

    }

    return QObject::event(e);

}

QT_END_NAMESPACE