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#include <QtGui>

#include <QtWebKit>

#include "mainwindow.h"

//! [1]

MainWindow::MainWindow()

{

    progress = 0;

    QFile file;

    file.setFileName(":/jquery.min.js");

    file.open(QIODevice::ReadOnly);

    jQuery = file.readAll();

    file.close();

//! [1]

    QNetworkProxyFactory::setUseSystemConfiguration(true);

//! [2]

    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);

//! [2]

//! [3]

    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);

    setUnifiedTitleAndToolBarOnMac(true);

}

//! [3]

//! [4]

void MainWindow::adjustLocation()

{

    locationEdit->setText(view->url().toString());

}

void MainWindow::changeLocation()

{

    QUrl url = QUrl(locationEdit->text());

    view->load(url);

    view->setFocus();

}

//! [4]

//! [5]

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();

}

//! [5]

//! [6]

void MainWindow::finishLoading(bool)

{

    progress = 100;

    adjustTitle();

    view->page()->mainFrame()->evaluateJavaScript(jQuery);

}

//! [6]

//! [7]

void MainWindow::highlightAllLinks()

{

    QString code = "$('a').each( function () { $(this).css('background-color', 'yellow') } )";

    view->page()->mainFrame()->evaluateJavaScript(code);

}

//! [7]

//! [8]

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);

}

//! [8]

//! [9]

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);

}

//! [9]