/****************************************************************************+
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**+
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** Copyright (C) 2010 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 Qt Assistant 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 "helpwindow.h"+
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#include "mainwindow.h"+
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#include "tabbedbrowser.h"+
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#include "helpdialog.h"+
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#include "config.h"+
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+
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#include <QApplication>+
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#include <QClipboard>+
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#include <QUrl>+
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#include <QMessageBox>+
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#include <QDir>+
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#include <QFile>+
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#include <QProcess>+
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#include <QAction>+
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#include <QFileInfo>+
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#include <QFont>+
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#include <QtEvents>+
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#include <QTextStream>+
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#include <QTextCodec>+
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#include <QStatusBar>+
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#include <QTextCursor>+
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#include <QTextObject>+
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#include <QTextLayout>+
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#include <QtDebug>+
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#include <qdesktopservices.h>+
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+
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#include <QtGui/QClipboard>+
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#include <QtGui/QApplication>+
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+
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#if defined(Q_OS_WIN32)+
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#  include <windows.h>+
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#endif+
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+
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QT_BEGIN_NAMESPACE+
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+
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HelpWindow::HelpWindow(MainWindow *w, QWidget *parent)+
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    : QTextBrowser(parent)+
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    , mw(w)+
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    , blockScroll(false)+
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    , shiftPressed(false)+
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    , newWindow(false)+
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{+
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    FontSettings settings = Config::configuration()->fontSettings();+
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    setFont(settings.browserFont);+
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+
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    connect(this, SIGNAL(copyAvailable(bool)), w, SLOT(copyAvailable(bool)));+
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}+
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+
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void HelpWindow::setSource(const QUrl &name)+
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{+
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    if (name.isValid()) {+
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        if (name.scheme() == QLatin1String("http") || name.scheme() == QLatin1String("ftp") +
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            || name.scheme() == QLatin1String("mailto") || name.path().endsWith(QLatin1String("pdf"))) {+
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            bool launched = QDesktopServices::openUrl(name);+
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            if (!launched) {+
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                QMessageBox::information(mw, tr("Help"),+
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                             tr("Unable to launch web browser.\n"),+
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                             tr("OK"));+
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            }+
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            return;+
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        }+
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+
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        QFileInfo fi(name.toLocalFile());+
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        if (name.scheme() == QLatin1String("file") && fi.exists()) {+
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            if (newWindow || (shiftPressed && hasFocus())) {+
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                shiftPressed = false;+
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                mw->saveSettings();+
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                MainWindow *nmw = new MainWindow;+
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                nmw->move(mw->geometry().topLeft());+
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                nmw->show();+
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                +
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                if (mw->isMaximized())+
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                    nmw->showMaximized();+
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                +
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                nmw->setup();+
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                nmw->showLink(name.toString());+
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            } else {+
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                QTextBrowser::setSource(name);+
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                QTextBrowser::scrollToAnchor(name.fragment());+
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            }+
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            return;+
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        }+
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    }+
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+
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    mw->statusBar()->showMessage(tr("Failed to open link: '%1'").arg(name.toString()), 5000);+
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    setHtml(tr("<div align=\"center\"><h1>The page could not be found</h1><br>"+
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        "<h3>'%1'</h3></div>").arg(name.toString()));+
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    mw->browsers()->updateTitle(tr("Error..."));+
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}+
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+
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void HelpWindow::openLinkInNewWindow()+
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{+
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    if (lastAnchor.isEmpty())+
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        return;+
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    newWindow = true;+
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    setSource(lastAnchor);+
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    newWindow = false;+
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}+
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+
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void HelpWindow::openLinkInNewWindow(const QString &link)+
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{+
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    lastAnchor = link;+
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    openLinkInNewWindow();+
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}+
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+
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void HelpWindow::openLinkInNewPage()+
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{+
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    if(lastAnchor.isEmpty())+
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        return;+
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    mw->browsers()->newTab(lastAnchor);+
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    lastAnchor.clear();+
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}+
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+
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void HelpWindow::openLinkInNewPage(const QString &link)+
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{+
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    lastAnchor = link;+
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    openLinkInNewPage();+
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}+
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+
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bool HelpWindow::hasAnchorAt(const QPoint& pos)+
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{+
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    lastAnchor = anchorAt(pos);+
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    if (lastAnchor.isEmpty()) +
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        return false;+
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    lastAnchor = source().resolved(lastAnchor).toString();+
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    if (lastAnchor.at(0) == QLatin1Char('#')) {+
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        QString src = source().toString();+
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        int hsh = src.indexOf(QLatin1Char('#'));+
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        lastAnchor = (hsh>=0 ? src.left(hsh) : src) + lastAnchor;+
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    }+
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    return true;+
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}+
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+
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void HelpWindow::contextMenuEvent(QContextMenuEvent *e)+
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{+
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    QMenu menu(QLatin1String(""), 0);+
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+
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    QUrl link;+
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    QAction *copyAnchorAction = 0;+
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    if (hasAnchorAt(e->pos())) {+
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        link = anchorAt(e->pos());+
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        if (link.isRelative())            +
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            link = source().resolved(link);+
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        copyAnchorAction = menu.addAction(tr("Copy &Link Location"));+
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        copyAnchorAction->setEnabled(!link.isEmpty() && link.isValid());+
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+
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        menu.addAction(tr("Open Link in New Tab"),+
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                       this, SLOT(openLinkInNewPage()));+
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        menu.addAction(tr("Open Link in New Window\tShift+LMB"),+
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                       this, SLOT(openLinkInNewWindow()));+
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    }+
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    mw->setupPopupMenu(&menu);+
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    QAction *action = menu.exec(e->globalPos());+
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    if (action == copyAnchorAction)+
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        QApplication::clipboard()->setText(link.toString());+
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}+
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+
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void HelpWindow::mouseReleaseEvent(QMouseEvent *e)+
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{+
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    if (e->button() == Qt::XButton1) {+
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        QTextBrowser::backward();+
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        return;+
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    } +
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    +
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    if (e->button() == Qt::XButton2) {+
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        QTextBrowser::forward();+
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        return;+
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    }+
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+
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    if (e->button() == Qt::MidButton && hasAnchorAt(e->pos())) {+
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        openLinkInNewPage();+
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        return;+
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    }+
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    QTextBrowser::mouseReleaseEvent(e);+
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}+
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+
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void HelpWindow::blockScrolling(bool b)+
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{+
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    blockScroll = b;+
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}+
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+
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void HelpWindow::ensureCursorVisible()+
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{+
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    if (!blockScroll)+
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        QTextBrowser::ensureCursorVisible();+
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}+
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+
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void HelpWindow::mousePressEvent(QMouseEvent *e)+
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{+
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    shiftPressed = e->modifiers() & Qt::ShiftModifier;+
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    if (!(shiftPressed && hasAnchorAt(e->pos())))+
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        QTextBrowser::mousePressEvent(e);+
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}+
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+
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void HelpWindow::keyPressEvent(QKeyEvent *e)+
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{+
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    shiftPressed = e->modifiers() & Qt::ShiftModifier;+
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    QTextBrowser::keyPressEvent(e);+
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}+
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+
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bool HelpWindow::isKDERunning() const+
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{+
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    return !qgetenv("KDE_FULL_SESSION").isEmpty();+
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}+
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+
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QT_END_NAMESPACE+
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