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

**

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

** All rights reserved.

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

**

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

**

** $QT_BEGIN_LICENSE:LGPL$

** 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/qdeclarativeimagebase_p.h"

#include "private/qdeclarativeimagebase_p_p.h"

#include <qdeclarativeengine.h>

#include <qdeclarativeinfo.h>

#include <qdeclarativepixmapcache_p.h>

#include <QFile>

QT_BEGIN_NAMESPACE

QDeclarativeImageBase::QDeclarativeImageBase(QDeclarativeImageBasePrivate &dd, QDeclarativeItem *parent)

  : QDeclarativeItem(dd, parent)

{

}

QDeclarativeImageBase::~QDeclarativeImageBase()

{

    Q_D(QDeclarativeImageBase);

    if (d->pendingPixmapCache)

        QDeclarativePixmapCache::cancel(d->url, this);

}

QDeclarativeImageBase::Status QDeclarativeImageBase::status() const

{

    Q_D(const QDeclarativeImageBase);

    return d->status;

}

qreal QDeclarativeImageBase::progress() const

{

    Q_D(const QDeclarativeImageBase);

    return d->progress;

}

bool QDeclarativeImageBase::asynchronous() const

{

    Q_D(const QDeclarativeImageBase);

    return d->async;

}

void QDeclarativeImageBase::setAsynchronous(bool async)

{

    Q_D(QDeclarativeImageBase);

    if (d->async != async) {

        d->async = async;

        emit asynchronousChanged();

    }

}

QUrl QDeclarativeImageBase::source() const

{

    Q_D(const QDeclarativeImageBase);

    return d->url;

}

void QDeclarativeImageBase::setSource(const QUrl &url)

{

    Q_D(QDeclarativeImageBase);

    //equality is fairly expensive, so we bypass for simple, common case

    if ((d->url.isEmpty() == url.isEmpty()) && url == d->url)

        return;

    if (d->pendingPixmapCache) {

        QDeclarativePixmapCache::cancel(d->url, this);

        d->pendingPixmapCache = false;

    }

    d->url = url;

    emit sourceChanged(d->url);

    if (isComponentComplete())

        load();

}

void QDeclarativeImageBase::setSourceSize(const QSize& size)

{

    Q_D(QDeclarativeImageBase);

    if (d->sourcesize == size)

        return;

    d->sourcesize = size;

    emit sourceSizeChanged();

    if (isComponentComplete())

        load();

}

QSize QDeclarativeImageBase::sourceSize() const

{

    Q_D(const QDeclarativeImageBase);

    return d->sourcesize.isValid() ? d->sourcesize : QSize(implicitWidth(),implicitHeight());

}

void QDeclarativeImageBase::load()

{

    Q_D(QDeclarativeImageBase);

    if (d->progress != 0.0) {

        d->progress = 0.0;

        emit progressChanged(d->progress);

    }

    if (d->url.isEmpty()) {

        d->pix = QPixmap();

        d->status = Null;

        setImplicitWidth(0);

        setImplicitHeight(0);

        emit statusChanged(d->status);

        pixmapChange();

        update();

    } else {

        d->status = Loading;

        int reqwidth = d->sourcesize.width();

        int reqheight = d->sourcesize.height();

        QSize impsize;

        QString errorString;

        QDeclarativePixmapReply::Status status = QDeclarativePixmapCache::get(d->url, &d->pix, &errorString, &impsize, d->async, reqwidth, reqheight);

        if (status != QDeclarativePixmapReply::Ready && status != QDeclarativePixmapReply::Error) {

            QDeclarativePixmapReply *reply = QDeclarativePixmapCache::request(qmlEngine(this), d->url, reqwidth, reqheight);

            d->pendingPixmapCache = true;

            static int replyDownloadProgress = -1;

            static int replyFinished = -1;

            static int thisRequestProgress = -1;

            static int thisRequestFinished = -1;

            if (replyDownloadProgress == -1) {

                replyDownloadProgress =

                    QDeclarativePixmapReply::staticMetaObject.indexOfSignal("downloadProgress(qint64,qint64)");

                replyFinished =

                    QDeclarativePixmapReply::staticMetaObject.indexOfSignal("finished()");

                thisRequestProgress =

                    QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestProgress(qint64,qint64)");

                thisRequestFinished =

                    QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestFinished()");

            }

            QMetaObject::connect(reply, replyFinished, this,

                                 thisRequestFinished, Qt::DirectConnection);

            QMetaObject::connect(reply, replyDownloadProgress, this,

                                 thisRequestProgress, Qt::DirectConnection);

        } else {

            //### should be unified with requestFinished

            if (status == QDeclarativePixmapReply::Ready) {

                setImplicitWidth(impsize.width());

                setImplicitHeight(impsize.height());

                if (d->status == Loading)

                    d->status = Ready;

                if (!d->sourcesize.isValid())

                    emit sourceSizeChanged();

            } else {

                d->status = Error;

                qmlInfo(this) << errorString;

            }

            d->progress = 1.0;

            emit statusChanged(d->status);

            emit progressChanged(d->progress);

            pixmapChange();

            update();

        }

    }

    emit statusChanged(d->status);

}

void QDeclarativeImageBase::requestFinished()

{

    Q_D(QDeclarativeImageBase);

    d->pendingPixmapCache = false;

    QSize impsize;

    QString errorString;

    if (QDeclarativePixmapCache::get(d->url, &d->pix, &errorString, &impsize, d->async, d->sourcesize.width(), d->sourcesize.height()) != QDeclarativePixmapReply::Ready) {

        d->status = Error;

        qmlInfo(this) << errorString;

    }

    setImplicitWidth(impsize.width());

    setImplicitHeight(impsize.height());

    if (d->status == Loading)

        d->status = Ready;

    d->progress = 1.0;

    emit statusChanged(d->status);

    emit progressChanged(1.0);

    if (!d->sourcesize.isValid())

        emit sourceSizeChanged();

    pixmapChange();

    update();

}

void QDeclarativeImageBase::requestProgress(qint64 received, qint64 total)

{

    Q_D(QDeclarativeImageBase);

    if (d->status == Loading && total > 0) {

        d->progress = qreal(received)/total;

        emit progressChanged(d->progress);

    }

}

void QDeclarativeImageBase::componentComplete()

{

    Q_D(QDeclarativeImageBase);

    QDeclarativeItem::componentComplete();

    if (d->url.isValid())

        load();

}

void QDeclarativeImageBase::pixmapChange()

{

}

QT_END_NAMESPACE