Assistant: Look for document encoding in XML headers as well.

Task-number:  QTBUG-1770
Reviewed-by: kh1

Conflicts:

	tools/assistant/lib/lib.pro

1 files changed, 112 insertions, 0 deletions

diff --git a/tools/assistant/lib/qhelp_global.cpp b/tools/assistant/lib/qhelp_global.cpp
new file mode 100644
index 0000000..980de27
--- /dev/null
+++ b/tools/assistant/lib/qhelp_global.cpp
@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Assistant.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/QRegExp>
+#include <QtCore/QMutexLocker>
+#include <QtGui/QTextDocument>
+
+#include "qhelp_global.h"
+
+QString QHelpGlobal::uniquifyConnectionName(const QString &name, void *pointer)
+{
+    static int counter = 0;
+    static QMutex mutex;
+
+    QMutexLocker locker(&mutex);
+    if (++counter > 1000)
+        counter = 0;
+
+    return QString::fromLatin1("%1-%2-%3").
+        arg(name).arg(long(pointer)).arg(counter);
+}
+
+QString QHelpGlobal::documentTitle(const QString &content)
+{
+    QString title = QObject::tr("Untitled");
+    if (!content.isEmpty()) {
+        int start = content.indexOf(QLatin1String("<title>"), 0, Qt::CaseInsensitive) + 7;
+        int end = content.indexOf(QLatin1String("</title>"), 0, Qt::CaseInsensitive);
+        if ((end - start) > 0) {
+            title = content.mid(start, end - start);
+            if (Qt::mightBeRichText(title) || title.contains(QLatin1Char('&'))) {
+                QTextDocument doc;
+                doc.setHtml(title);
+                title = doc.toPlainText();
+            }
+        }
+    }
+    return title;
+}
+
+QString QHelpGlobal::codecFromData(const QByteArray &data)
+{
+    QString codec = codecFromXmlData(data);
+    if (codec.isEmpty())
+        codec = codecFromHtmlData(data);
+    return codec.isEmpty() ? QLatin1String("utf-8") : codec;
+}
+
+QString QHelpGlobal::codecFromHtmlData(const QByteArray &data)
+{
+    QString content = QString::fromUtf8(data.constData(), data.size());
+    int start = content.indexOf(QLatin1String("<meta"), 0, Qt::CaseInsensitive);
+    if (start > 0) {
+        int end;
+        QRegExp r(QLatin1String("charset=([^\"\\s]+)"));
+        while (start != -1) {
+            end = content.indexOf(QLatin1Char('>'), start) + 1;
+            const QString &meta = content.mid(start, end - start).toLower();
+            if (r.indexIn(meta) != -1)
+                return r.cap(1);
+            start = content.indexOf(QLatin1String("<meta"), end,
+                                    Qt::CaseInsensitive);
+        }
+    }
+    return QString();
+}
+
+QString QHelpGlobal::codecFromXmlData(const QByteArray &data)
+{
+    QString content = QString::fromUtf8(data.constData(), data.size());
+    const QRegExp encodingExp(QLatin1String("^\\s*<\\?xml version="
+        "\"\\d\\.\\d\" encoding=\"([^\"]+)\"\\?>.*"));
+    return encodingExp.exactMatch(content) ? encodingExp.cap(1) : QString();
+}