/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the examples 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 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 the GNU General Public License version 3.0 requirements will be
** met: 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.
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtGui>
#include <QtWebKit>
#include "mainwindow.h"

MainWindow::MainWindow()
{
    progress = 0;

    QFile file;
    file.setFileName(":/jquery.min.js");
    file.open(QIODevice::ReadOnly);
    jQuery = file.readAll();
    file.close();

    view = new QWebView(this);
    view->load(QUrl("http://www.google.com/ncr"));
    connect(view, SIGNAL(loadFinished(bool)), SLOT(adjustLocation()));
    connect(view, SIGNAL(titleChanged(const QString&)), SLOT(adjustTitle()));
    connect(view, SIGNAL(loadProgress(int)), SLOT(setProgress(int)));
    connect(view, SIGNAL(loadFinished(bool)), SLOT(finishLoading(bool)));

    locationEdit = new QLineEdit(this);
    locationEdit->setSizePolicy(QSizePolicy::Expanding, locationEdit->sizePolicy().verticalPolicy());
    connect(locationEdit, SIGNAL(returnPressed()), SLOT(changeLocation()));

    QToolBar *toolBar = addToolBar(tr("Navigation"));
    toolBar->addAction(view->pageAction(QWebPage::Back));
    toolBar->addAction(view->pageAction(QWebPage::Forward));
    toolBar->addAction(view->pageAction(QWebPage::Reload));
    toolBar->addAction(view->pageAction(QWebPage::Stop));
    toolBar->addWidget(locationEdit);

    QMenu *effectMenu = menuBar()->addMenu(tr("&Effect"));
    effectMenu->addAction("Highlight all links", this, SLOT(highlightAllLinks()));

    QAction *rotateAction = new QAction(this);
    rotateAction->setIcon(style()->standardIcon(QStyle::SP_FileDialogDetailedView));
    rotateAction->setCheckable(true);
    rotateAction->setText(tr("Turn images upside down"));
    connect(rotateAction, SIGNAL(toggled(bool)), this, SLOT(rotateImages(bool)));
    effectMenu->addAction(rotateAction);

    QMenu *toolsMenu = menuBar()->addMenu(tr("&Tools"));
    toolsMenu->addAction(tr("Remove GIF images"), this, SLOT(removeGifImages()));
    toolsMenu->addAction(tr("Remove all inline frames"), this, SLOT(removeInlineFrames()));
    toolsMenu->addAction(tr("Remove all object elements"), this, SLOT(removeObjectElements()));
    toolsMenu->addAction(tr("Remove all embedded elements"), this, SLOT(removeEmbeddedElements()));

    setCentralWidget(view);
}

void MainWindow::adjustLocation()
{
    locationEdit->setText(view->url().toString());
}

void MainWindow::changeLocation()
{
    QUrl url = QUrl(locationEdit->text());
    locationEdit->setText(url.toString());
    view->load(url);
    view->setFocus();
}

void MainWindow::adjustTitle()
{
    if (progress <= 0 || progress >= 100)
        setWindowTitle(view->title());
    else
        setWindowTitle(QString("%1 (%2%)").arg(view->title()).arg(progress));
}

void MainWindow::setProgress(int p)
{
    progress = p;
    adjustTitle();
}

void MainWindow::finishLoading(bool)
{
    progress = 100;
    adjustTitle();
    view->page()->mainFrame()->evaluateJavaScript(jQuery);
}

void MainWindow::highlightAllLinks()
{
    QString code = "$('a').each( function () { $(this).css('background-color', 'yellow') } )";
    view->page()->mainFrame()->evaluateJavaScript(code);
}

void MainWindow::rotateImages(bool toggle)
{
    QString code = "$('img').each( function () { $(this).css('-webkit-transition', '-webkit-transform 2s') } )";
    view->page()->mainFrame()->evaluateJavaScript(code);
    if (toggle)
        code = "$('img').each( function () { $(this).css('-webkit-transform', 'rotate(180deg)') } )";
    else
        code = "$('img').each( function () { $(this).css('-webkit-transform', 'rotate(0deg)') } )";
    view->page()->mainFrame()->evaluateJavaScript(code);
}

void MainWindow::removeGifImages()
{
    QString code = "$('[src*=gif]').remove()";
    view->page()->mainFrame()->evaluateJavaScript(code);
}

void MainWindow::removeInlineFrames()
{
    QString code = "$('iframe').remove()";
    view->page()->mainFrame()->evaluateJavaScript(code);
}

void MainWindow::removeObjectElements()
{
    QString code = "$('object').remove()";
    view->page()->mainFrame()->evaluateJavaScript(code);
}

void MainWindow::removeEmbeddedElements()
{
    QString code = "$('embed').remove()";
    view->page()->mainFrame()->evaluateJavaScript(code);
}