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

**

** 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 examples of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:BSD$

** You may use this file under the terms of the BSD license as follows:

**

** "Redistribution and use in source and binary forms, with or without

** modification, are permitted provided that the following conditions are

** met:

**   * Redistributions of source code must retain the above copyright

**     notice, this list of conditions and the following disclaimer.

**   * Redistributions in binary form must reproduce the above copyright

**     notice, this list of conditions and the following disclaimer in

**     the documentation and/or other materials provided with the

**     distribution.

**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor

**     the names of its contributors may be used to endorse or promote

**     products derived from this software without specific prior written

**     permission.

**

** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."

** $QT_END_LICENSE$

**

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

#include "framecapture.h"

#include <iostream>

#include <QtWebKit>

FrameCapture::FrameCapture(): QObject(), m_percent(0)

{

    connect(&m_page, SIGNAL(loadProgress(int)), this, SLOT(printProgress(int)));

    connect(&m_page, SIGNAL(loadFinished(bool)), this, SLOT(saveResult(bool)));

}

void FrameCapture::load(const QUrl &url, const QString &outputFileName)

{

    std::cout << "Loading " << qPrintable(url.toString()) << std::endl;

    m_percent = 0;

    int index = outputFileName.lastIndexOf('.');

    m_fileName = (index == -1) ? outputFileName + ".png" : outputFileName;

    m_page.mainFrame()->load(url);

    m_page.mainFrame()->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);

    m_page.mainFrame()->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);

    m_page.setViewportSize(QSize(1024, 768));

}

void FrameCapture::printProgress(int percent)

{

    if (m_percent >= percent)

        return;

    while (m_percent++ < percent)

        std::cout << "#" << std::flush;

}

void FrameCapture::saveResult(bool ok)

{

    std::cout << std::endl;

    // crude error-checking

    if (!ok) {

        std::cerr << "Failed loading " << qPrintable(m_page.mainFrame()->url().toString()) << std::endl;

        emit finished();

        return;

    }

    // save each frame in different image files

    saveFrame(m_page.mainFrame());

    emit finished();

}

void FrameCapture::saveFrame(QWebFrame *frame)

{

    static int frameCounter = 0;

    QString fileName(m_fileName);

    if (frameCounter) {

        int index = m_fileName.lastIndexOf('.');

        fileName = fileName.insert(index, "_frame" + QString::number(frameCounter));

    }

    QImage image(frame->contentsSize(), QImage::Format_ARGB32_Premultiplied);

    image.fill(Qt::transparent);

    QPainter painter(&image);

    painter.setRenderHint(QPainter::Antialiasing, true);

    painter.setRenderHint(QPainter::TextAntialiasing, true);

    painter.setRenderHint(QPainter::SmoothPixmapTransform, true);

    frame->documentElement().render(&painter);

    painter.end();

    image.save(fileName);

    ++frameCounter;

    foreach(QWebFrame *childFrame, frame->childFrames())

        saveFrame(childFrame);

}