/* ============================================================
*
* This file is a part of the rekonq project
*
* Copyright (C) 2009 Nokia Corporation <qt-info@nokia.com>
* Copyright (C) 2009 by Andrea Diamantini <adjam7 at gmail dot com>
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy 
* defined in Section 14 of version 3 of the license.
* 
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
* ============================================================ */


#include "websnap.h"
#include "websnap.moc"

#include <KDebug>
#include <KStandardDirs>

#include <QSize>
#include <QWebFrame>
#include <QPainter>
#include <QTimer>


WebSnap::WebSnap(const KUrl &url, const QString &fileName)
    : QObject()
    , m_url(url)
    , m_image(QImage())
    , m_fileName(fileName)
{
    m_targetSize = QSize(200, 150);
    connect(&m_page, SIGNAL(loadFinished(bool)), this, SLOT(saveResult(bool)));
    QTimer::singleShot(0, this, SLOT(load()));

}


void WebSnap::load()
{
    m_page.mainFrame()->load(m_url);
}


void WebSnap::saveResult(bool ok)
{
    // crude error-checking
    if (!ok) 
    {
        kDebug() << "Error loading site..";
        emit finished();
        return;
    }

    // find proper size, we stick to sensible aspect ratio
    QSize size = m_page.mainFrame()->contentsSize();
    size.setHeight(size.width() * m_targetSize.height() / m_targetSize.width());
    
    // create the target surface
    m_image = QImage( size , QImage::Format_ARGB32_Premultiplied);
    m_image.fill(Qt::transparent);

    // render and rescale
    QPainter p(&m_image);
    m_page.setViewportSize(m_page.mainFrame()->contentsSize());
    m_page.mainFrame()->render(&p);
    p.end();
    m_image = m_image.scaled(m_targetSize, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);

    QString path = KStandardDirs::locateLocal("cache", QString("thumbs/") + m_fileName, true);
    m_image.save( path );

    emit finished();
}