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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Graphics Dojo project on Qt Labs.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 or 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 GNU
** General Public Licensing requirements will be met:
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include <iostream>
#include <QtGui>
#include <QtWebKit>
class WebSnap : public QObject
{
Q_OBJECT
public:
WebSnap();
QSize targetSize() const;
void setTargetSize(const QSize &s);
QImage image() const;
void load(const QUrl &url, const QString &outputFileName);
signals:
void finished();
private slots:
void saveResult(bool ok);
private:
QWebPage m_page;
QString m_fileName;
QSize m_targetSize;
QImage m_image;
};
WebSnap::WebSnap(): QObject()
{
m_targetSize = QSize(400, 300);
connect(&m_page, SIGNAL(loadFinished(bool)), this, SLOT(saveResult(bool)));
}
void WebSnap::setTargetSize(const QSize &s)
{
m_targetSize = s;
}
QSize WebSnap::targetSize() const
{
return m_targetSize;
}
QImage WebSnap::image() const
{
return m_image;
}
void WebSnap::load(const QUrl &url, const QString &outputFileName)
{
m_fileName = outputFileName;
m_image = QImage();
m_page.mainFrame()->load(url);
}
void WebSnap::saveResult(bool ok)
{
// crude error-checking
if (!ok) {
std::cerr << "Failed loading " << qPrintable(m_page.mainFrame()->url().toString()) << std::endl;
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);
if (!m_fileName.isEmpty()) {
if (m_image.save(m_fileName, "png"))
std::cout << "Result saved to " << qPrintable(m_fileName) << std::endl;
else
std::cout << "Failed to save to " << qPrintable(m_fileName) << std::endl;
}
emit finished();
}
// shamelessly copied from Qt Demo Browser
static QUrl guessUrlFromString(const QString &string)
{
QString urlStr = string.trimmed();
QRegExp test(QLatin1String("^[a-zA-Z]+\\:.*"));
// Check if it looks like a qualified URL. Try parsing it and see.
bool hasSchema = test.exactMatch(urlStr);
if (hasSchema) {
QUrl url(urlStr, QUrl::TolerantMode);
if (url.isValid())
return url;
}
// Might be a file.
if (QFile::exists(urlStr))
return QUrl::fromLocalFile(urlStr);
// Might be a shorturl - try to detect the schema.
if (!hasSchema) {
int dotIndex = urlStr.indexOf(QLatin1Char('.'));
if (dotIndex != -1) {
QString prefix = urlStr.left(dotIndex).toLower();
QString schema = (prefix == QLatin1String("ftp")) ? prefix : QLatin1String("http");
QUrl url(schema + QLatin1String("://") + urlStr, QUrl::TolerantMode);
if (url.isValid())
return url;
}
}
// Fall back to QUrl's own tolerant parser.
return QUrl(string, QUrl::TolerantMode);
}
#include "websnap.moc"
int main(int argc, char * argv[])
{
if ((argc < 2) || (argc == 4)) {
std::cout << "Create a thumbnail preview of a web page" << std::endl << std::endl;
std::cout << " websnap url [outputfile [width height]]" << std::endl << std::endl;
std::cout << "Examples: " << std::endl;
std::cout << " websnap www.trolltech.com" << std::endl;
std::cout << " websnap www.nokia.com" << std::endl;
std::cout << " websnap www.google.com google.png 400 300" << std::endl;
std::cout << std::endl;
return 0;
}
QString fileName;
QUrl url = guessUrlFromString(QString::fromLatin1(argv[1]));
if (argc >= 3) {
fileName = QString::fromLatin1(argv[2]);
} else {
fileName = QFileInfo(url.path()).completeBaseName();
if (fileName.isEmpty())
fileName = "result";
fileName += ".png";
}
QApplication a(argc, argv);
WebSnap websnap;
QObject::connect(&websnap, SIGNAL(finished()), QApplication::instance(), SLOT(quit()));
if (argc == 5) {
int w = QString::fromLatin1(argv[3]).toInt();
int h = QString::fromLatin1(argv[4]).toInt();
websnap.setTargetSize(QSize(w, h));
if (!websnap.targetSize().isValid() || w <= 0 || h <= 0) {
std::cerr << "Please specify a valid target size !" << std::endl;
return 0;
}
}
websnap.load(url, fileName);
return a.exec();
}
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