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/* ============================================================
*
* This file is a part of the rekonq project
*
* Copyright (C) 2009 Nokia Corporation <qt-info@nokia.com>
* Copyright (C) 2009-2011 by Andrea Diamantini <adjam7 at gmail dot com>
* Copyright (C) 2010 by Matthieu Gicquel <matgic78 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/>.
*
* ============================================================ */
// Self Includes
#include "websnap.h"
#include "websnap.moc"
// Local Includes
#include "newtabpage.h"
// KDE Includes
#include <KStandardDirs>
// Qt Includes
#include <QtCore/QSize>
#include <QtCore/QFile>
#include <QtGui/QPainter>
#include <QtGui/QAction>
#include <QtWebKit/QWebFrame>
#include <QtWebKit/QWebSettings>
WebSnap::WebSnap(const KUrl& url, QObject *parent)
: QObject(parent)
, m_url(url)
{
// this to not register websnap history
m_page.settings()->setAttribute(QWebSettings::PrivateBrowsingEnabled, true);
// this to not let this page open other windows
m_page.settings()->setAttribute(QWebSettings::PluginsEnabled, false);
m_page.settings()->setAttribute(QWebSettings::JavascriptEnabled, false);
connect(&m_page, SIGNAL(loadFinished(bool)), this, SLOT(saveResult(bool)));
QMetaObject::invokeMethod(this, "load", Qt::QueuedConnection);
}
WebSnap::~WebSnap()
{
kDebug() << "oh oh..";
m_page.action(QWebPage::Stop)->trigger();
m_page.deleteLater();
}
void WebSnap::load()
{
m_page.mainFrame()->load(m_url);
}
QPixmap WebSnap::render(const QWebPage &page, int w, int h)
{
// create the page image
QPixmap pageImage = QPixmap(w, h);
pageImage.fill(Qt::transparent);
// render it
QPainter p(&pageImage);
page.mainFrame()->render(&p, QWebFrame::ContentsLayer);
p.end();
return pageImage;
}
QPixmap WebSnap::renderTabPreview(const QWebPage &page, int w, int h)
{
QSize oldSize = page.viewportSize();
int width = page.mainFrame()->contentsSize().width();
page.setViewportSize(QSize(width, width * ((0.0 + h) / w)));
QPixmap pageImage = WebSnap::render(page, page.viewportSize().width(), page.viewportSize().height());
page.setViewportSize(oldSize);
return pageImage.scaled(w, h, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
}
/*
// This code is an attempt to render a page currently displayed in a tab without alterate it.
// It currently does not work but can give ideas:
// - activate/disable scrollbars of a webview causes problems => this method try to not do that
// - the viewport and the scroll position must be modified an restored
// - page.setViewportSize(size); does not seem to work when the page is currently displayed in a webview
QPixmap WebSnap::renderVisiblePagePreview(const QWebPage &page, int w, int h)
{
// save page settings
QSize oldSize = page.viewportSize();
QPoint oldScrollPosition = page.mainFrame()->scrollPosition();
// minimum width
int width = 640;
// find best width
QSize size;
while(page.mainFrame()->scrollBarMaximum(Qt::Horizontal) && width<1920)
{
width+=5;
size = QSize(width, width * ((0.0 + h) / w));
page.setViewportSize(size);
}
// scroll to top
page.mainFrame()->setScrollBarValue(Qt::Vertical, 0);
// render
QPixmap pageImage = WebSnap::render(page, page.viewportSize().width(), page.viewportSize().height());
// detect scrollbar size
int scrollbarWidth = (page.mainFrame()->scrollBarMaximum(Qt::Horizontal) ? 17 : 0); //TODO: detect QStyle size for scrollbars
int scrollbarHeight = (page.mainFrame()->scrollBarMaximum(Qt::Vertical) ? 17 : 0);
// resize image
pageImage = pageImage.copy(0, 0, width - scrollbarWidth, size.height() - scrollbarHeight);
pageImage = pageImage.scaled(w, h, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
// restore page settings
page.setViewportSize(oldSize);
page.mainFrame()->setScrollPosition(oldScrollPosition);
return pageImage;
}
*/
QPixmap WebSnap::renderClosingPagePreview(const QWebPage &page, int w, int h)
{
//scroll to top
page.mainFrame()->setScrollBarValue(Qt::Vertical, 0);
// reduce as much as possible
page.setViewportSize(QSize(10, 10));
return renderPagePreview(page, w, h);
}
QPixmap WebSnap::renderPagePreview(const QWebPage &page, int w, int h)
{
//prepare page
page.mainFrame()->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
int width = page.mainFrame()->contentsSize().width();
page.setViewportSize(QSize(width, width * ((0.0 + h) / w)));
//render
QPixmap pageImage = WebSnap::render(page, page.viewportSize().width(), page.viewportSize().height());
// resize image
pageImage = pageImage.scaled(w, h, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
return pageImage;
}
QString WebSnap::imagePathFromUrl(const KUrl &url)
{
QUrl temp = QUrl(url.url());
QByteArray name = temp.toEncoded(QUrl::RemoveScheme | QUrl::RemoveUserInfo | QUrl::StripTrailingSlash);
return KStandardDirs::locateLocal("cache", QString("thumbs/") + name.toBase64() + ".png", true);
}
void WebSnap::saveResult(bool ok)
{
if (ok)
{
QPixmap image = renderPagePreview(m_page, defaultWidth, defaultHeight);
QString path = imagePathFromUrl(m_url);
QFile::remove(path);
image.save(path);
}
emit snapDone(ok);
kDebug() << "SAVE RESULTS: " << ok << " URL: " << m_url;
this->deleteLater();
}
bool WebSnap::existsImage(const KUrl &u)
{
return QFile::exists(imagePathFromUrl(u));
}
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