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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the Qt Assistant of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

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    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

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    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtCore/QRegExp>

    43 #include <QtCore/QMutexLocker>

    44 #include <QtGui/QTextDocument>

    45 

    46 #include "qhelp_global.h"

    47 

    48 QString QHelpGlobal::uniquifyConnectionName(const QString &name, void *pointer)

    49 {

    50     static int counter = 0;

    51     static QMutex mutex;

    52 

    53     QMutexLocker locker(&mutex);

    54     if (++counter > 1000)

    55         counter = 0;

    56 

    57     return QString::fromLatin1("%1-%2-%3").

    58         arg(name).arg(long(pointer)).arg(counter);

    59 }

    60 

    61 QString QHelpGlobal::documentTitle(const QString &content)

    62 {

    63     QString title = QObject::tr("Untitled");

    64     if (!content.isEmpty()) {

    65         int start = content.indexOf(QLatin1String("<title>"), 0, Qt::CaseInsensitive) + 7;

    66         int end = content.indexOf(QLatin1String("</title>"), 0, Qt::CaseInsensitive);

    67         if ((end - start) > 0) {

    68             title = content.mid(start, end - start);

    69             if (Qt::mightBeRichText(title) || title.contains(QLatin1Char('&'))) {

    70                 QTextDocument doc;

    71                 doc.setHtml(title);

    72                 title = doc.toPlainText();

    73             }

    74         }

    75     }

    76     return title;

    77 }

    78 

    79 QString QHelpGlobal::codecFromData(const QByteArray &data)

    80 {

    81     QString codec = codecFromXmlData(data);

    82     if (codec.isEmpty())

    83         codec = codecFromHtmlData(data);

    84     return codec.isEmpty() ? QLatin1String("utf-8") : codec;

    85 }

    86 

    87 QString QHelpGlobal::codecFromHtmlData(const QByteArray &data)

    88 {

    89     QString content = QString::fromUtf8(data.constData(), data.size());

    90     int start = content.indexOf(QLatin1String("<meta"), 0, Qt::CaseInsensitive);

    91     if (start > 0) {

    92         int end;

    93         QRegExp r(QLatin1String("charset=([^\"\\s]+)"));

    94         while (start != -1) {

    95             end = content.indexOf(QLatin1Char('>'), start) + 1;

    96             const QString &meta = content.mid(start, end - start).toLower();

    97             if (r.indexIn(meta) != -1)

    98                 return r.cap(1);

    99             start = content.indexOf(QLatin1String("<meta"), end,

   100                                     Qt::CaseInsensitive);

   101         }

   102     }

   103     return QString();

   104 }

   105 

   106 QString QHelpGlobal::codecFromXmlData(const QByteArray &data)

   107 {

   108     QString content = QString::fromUtf8(data.constData(), data.size());

   109     const QRegExp encodingExp(QLatin1String("^\\s*<\\?xml version="

   110         "\"\\d\\.\\d\" encoding=\"([^\"]+)\"\\?>.*"));

   111     return encodingExp.exactMatch(content) ? encodingExp.cap(1) : QString();

   112 }