/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the demonstration applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "browserapplication.h"+
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#include "browsermainwindow.h"+
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#include "cookiejar.h"+
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#include "downloadmanager.h"+
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#include "networkaccessmanager.h"+
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#include "tabwidget.h"+
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#include "webview.h"+
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+
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#include <QtGui/QClipboard>+
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#include <QtGui/QMenu>+
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#include <QtGui/QMessageBox>+
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#include <QtGui/QMouseEvent>+
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+
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#include <QtWebKit/QWebHitTestResult>+
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+
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#ifndef QT_NO_UITOOLS+
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#include <QtUiTools/QUiLoader>+
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#endif  //QT_NO_UITOOLS+
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+
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#include <QtCore/QDebug>+
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#include <QtCore/QBuffer>+
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+
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WebPage::WebPage(QObject *parent)+
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    : QWebPage(parent)+
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    , m_keyboardModifiers(Qt::NoModifier)+
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    , m_pressedButtons(Qt::NoButton)+
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    , m_openInNewTab(false)+
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{+
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    setNetworkAccessManager(BrowserApplication::networkAccessManager());+
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    connect(this, SIGNAL(unsupportedContent(QNetworkReply *)),+
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            this, SLOT(handleUnsupportedContent(QNetworkReply *)));+
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}+
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+
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BrowserMainWindow *WebPage::mainWindow()+
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{+
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    QObject *w = this->parent();+
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    while (w) {+
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        if (BrowserMainWindow *mw = qobject_cast<BrowserMainWindow*>(w))+
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            return mw;+
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        w = w->parent();+
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    }+
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    return BrowserApplication::instance()->mainWindow();+
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}+
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+
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bool WebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, NavigationType type)+
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{+
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    // ctrl open in new tab+
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    // ctrl-shift open in new tab and select+
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    // ctrl-alt open in new window+
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    if (type == QWebPage::NavigationTypeLinkClicked+
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        && (m_keyboardModifiers & Qt::ControlModifier+
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            || m_pressedButtons == Qt::MidButton)) {+
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        bool newWindow = (m_keyboardModifiers & Qt::AltModifier);+
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        WebView *webView;+
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        if (newWindow) {+
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            BrowserApplication::instance()->newMainWindow();+
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            BrowserMainWindow *newMainWindow = BrowserApplication::instance()->mainWindow();+
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            webView = newMainWindow->currentTab();+
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            newMainWindow->raise();+
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            newMainWindow->activateWindow();+
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            webView->setFocus();+
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        } else {+
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            bool selectNewTab = (m_keyboardModifiers & Qt::ShiftModifier);+
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            webView = mainWindow()->tabWidget()->newTab(selectNewTab);+
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        }+
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        webView->load(request);+
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        m_keyboardModifiers = Qt::NoModifier;+
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        m_pressedButtons = Qt::NoButton;+
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        return false;+
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    }+
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    if (frame == mainFrame()) {+
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        m_loadingUrl = request.url();+
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        emit loadingUrl(m_loadingUrl);+
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    }+
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    return QWebPage::acceptNavigationRequest(frame, request, type);+
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}+
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+
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QWebPage *WebPage::createWindow(QWebPage::WebWindowType type)+
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{+
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    Q_UNUSED(type);+
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    if (m_keyboardModifiers & Qt::ControlModifier || m_pressedButtons == Qt::MidButton)+
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        m_openInNewTab = true;+
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    if (m_openInNewTab) {+
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        m_openInNewTab = false;+
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        return mainWindow()->tabWidget()->newTab()->page();+
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    }+
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    BrowserApplication::instance()->newMainWindow();+
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    BrowserMainWindow *mainWindow = BrowserApplication::instance()->mainWindow();+
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    return mainWindow->currentTab()->page();+
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}+
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+
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#if !defined(QT_NO_UITOOLS)+
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QObject *WebPage::createPlugin(const QString &classId, const QUrl &url, const QStringList &paramNames, const QStringList &paramValues)+
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{+
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    Q_UNUSED(url);+
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    Q_UNUSED(paramNames);+
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    Q_UNUSED(paramValues);+
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    QUiLoader loader;+
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    return loader.createWidget(classId, view());+
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}+
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#endif // !defined(QT_NO_UITOOLS)+
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+
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void WebPage::handleUnsupportedContent(QNetworkReply *reply)+
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{+
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    if (reply->error() == QNetworkReply::NoError) {+
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        BrowserApplication::downloadManager()->handleUnsupportedContent(reply);+
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        return;+
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    }+
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+
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    QFile file(QLatin1String(":/notfound.html"));+
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    bool isOpened = file.open(QIODevice::ReadOnly);+
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    Q_ASSERT(isOpened);+
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    Q_UNUSED(isOpened)+
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+
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    QString title = tr("Error loading page: %1").arg(reply->url().toString());+
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    QString html = QString(QLatin1String(file.readAll()))+
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                        .arg(title)+
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                        .arg(reply->errorString())+
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                        .arg(reply->url().toString());+
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+
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    QBuffer imageBuffer;+
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    imageBuffer.open(QBuffer::ReadWrite);+
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    QIcon icon = view()->style()->standardIcon(QStyle::SP_MessageBoxWarning, 0, view());+
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    QPixmap pixmap = icon.pixmap(QSize(32,32));+
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    if (pixmap.save(&imageBuffer, "PNG")) {+
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        html.replace(QLatin1String("IMAGE_BINARY_DATA_HERE"),+
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                     QString(QLatin1String(imageBuffer.buffer().toBase64())));+
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    }+
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+
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    QList<QWebFrame*> frames;+
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    frames.append(mainFrame());+
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    while (!frames.isEmpty()) {+
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        QWebFrame *frame = frames.takeFirst();+
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        if (frame->url() == reply->url()) {+
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            frame->setHtml(html, reply->url());+
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            return;+
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        }+
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        QList<QWebFrame *> children = frame->childFrames();+
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        foreach(QWebFrame *frame, children)+
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            frames.append(frame);+
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    }+
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    if (m_loadingUrl == reply->url()) {+
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        mainFrame()->setHtml(html, reply->url());+
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    }+
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}+
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+
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+
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WebView::WebView(QWidget* parent)+
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    : QWebView(parent)+
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    , m_progress(0)+
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    , m_page(new WebPage(this))+
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{+
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    setPage(m_page);+
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    connect(page(), SIGNAL(statusBarMessage(const QString&)),+
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            SLOT(setStatusBarText(const QString&)));+
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    connect(this, SIGNAL(loadProgress(int)),+
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            this, SLOT(setProgress(int)));+
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    connect(this, SIGNAL(loadFinished(bool)),+
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            this, SLOT(loadFinished()));+
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    connect(page(), SIGNAL(loadingUrl(const QUrl&)),+
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            this, SIGNAL(urlChanged(const QUrl &)));+
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    connect(page(), SIGNAL(downloadRequested(const QNetworkRequest &)),+
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            this, SLOT(downloadRequested(const QNetworkRequest &)));+
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    page()->setForwardUnsupportedContent(true);+
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+
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}+
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+
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void WebView::contextMenuEvent(QContextMenuEvent *event)+
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{+
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    QWebHitTestResult r = page()->mainFrame()->hitTestContent(event->pos());+
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    if (!r.linkUrl().isEmpty()) {+
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        QMenu menu(this);+
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        menu.addAction(pageAction(QWebPage::OpenLinkInNewWindow));+
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        menu.addAction(tr("Open in New Tab"), this, SLOT(openLinkInNewTab()));+
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        menu.addSeparator();+
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        menu.addAction(pageAction(QWebPage::DownloadLinkToDisk));+
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        // Add link to bookmarks...+
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        menu.addSeparator();+
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        menu.addAction(pageAction(QWebPage::CopyLinkToClipboard));+
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        if (page()->settings()->testAttribute(QWebSettings::DeveloperExtrasEnabled))+
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            menu.addAction(pageAction(QWebPage::InspectElement));+
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        menu.exec(mapToGlobal(event->pos()));+
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        return;+
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    }+
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    QWebView::contextMenuEvent(event);+
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}+
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+
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void WebView::wheelEvent(QWheelEvent *event)+
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{+
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    if (QApplication::keyboardModifiers() & Qt::ControlModifier) {+
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        int numDegrees = event->delta() / 8;+
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        int numSteps = numDegrees / 15;+
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        setTextSizeMultiplier(textSizeMultiplier() + numSteps * 0.1);+
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        event->accept();+
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        return;+
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    }+
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    QWebView::wheelEvent(event);+
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}+
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+
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void WebView::openLinkInNewTab()+
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{+
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    m_page->m_openInNewTab = true;+
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    pageAction(QWebPage::OpenLinkInNewWindow)->trigger();+
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}+
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+
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void WebView::setProgress(int progress)+
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{+
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    m_progress = progress;+
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}+
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+
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void WebView::loadFinished()+
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{+
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    if (100 != m_progress) {+
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        qWarning() << "Recieved finished signal while progress is still:" << progress()+
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                   << "Url:" << url();+
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    }+
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    m_progress = 0;+
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}+
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+
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void WebView::loadUrl(const QUrl &url)+
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{+
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    m_initialUrl = url;+
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    load(url);+
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}+
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+
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QString WebView::lastStatusBarText() const+
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{+
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    return m_statusBarText;+
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}+
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+
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QUrl WebView::url() const+
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{+
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    QUrl url = QWebView::url();+
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    if (!url.isEmpty())+
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        return url;+
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+
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    return m_initialUrl;+
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}+
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+
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void WebView::mousePressEvent(QMouseEvent *event)+
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{+
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    m_page->m_pressedButtons = event->buttons();+
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    m_page->m_keyboardModifiers = event->modifiers();+
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    QWebView::mousePressEvent(event);+
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}+
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+
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void WebView::mouseReleaseEvent(QMouseEvent *event)+
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{+
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    QWebView::mouseReleaseEvent(event);+
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    if (!event->isAccepted() && (m_page->m_pressedButtons & Qt::MidButton)) {+
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        QUrl url(QApplication::clipboard()->text(QClipboard::Selection));+
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        if (!url.isEmpty() && url.isValid() && !url.scheme().isEmpty()) {+
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            setUrl(url);+
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        }+
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    }+
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}+
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+
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void WebView::setStatusBarText(const QString &string)+
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{+
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    m_statusBarText = string;+
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}+
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+
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void WebView::downloadRequested(const QNetworkRequest &request)+
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{+
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    BrowserApplication::downloadManager()->download(request);+
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}+
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+
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