1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Assistant of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include <QtCore/QCoreApplication>
41#include <QtCore/QRegExp>
42#include <QtCore/QMutexLocker>
43#include <QtGui/QTextDocument>
44
45#include "qhelp_global.h"
46
47QString QHelpGlobal::uniquifyConnectionName(const QString &name, void *pointer)
48{
49 static QMutex mutex;
50 QMutexLocker locker(&mutex);
51
52 static QHash<QString,quint16> idHash;
53
54 return QString::fromLatin1(str: "%1-%2-%3").
55 arg(a: name).arg(a: quintptr(pointer)).arg(a: ++idHash[name]);
56}
57
58QString QHelpGlobal::documentTitle(const QString &content)
59{
60 QString title = QCoreApplication::translate(context: "QHelp", key: "Untitled");
61 if (!content.isEmpty()) {
62 const int start = content.indexOf(s: QLatin1String("<title>"), from: 0, cs: Qt::CaseInsensitive) + 7;
63 const int end = content.indexOf(s: QLatin1String("</title>"), from: 0, cs: Qt::CaseInsensitive);
64 if ((end - start) > 0) {
65 title = content.mid(position: start, n: end - start);
66 if (Qt::mightBeRichText(title) || title.contains(c: QLatin1Char('&'))) {
67 QTextDocument doc;
68 doc.setHtml(title);
69 title = doc.toPlainText();
70 }
71 }
72 }
73 return title;
74}
75
76QString QHelpGlobal::codecFromData(const QByteArray &data)
77{
78 QString codec = codecFromXmlData(data);
79 if (codec.isEmpty())
80 codec = codecFromHtmlData(data);
81 return codec.isEmpty() ? QLatin1String("utf-8") : codec;
82}
83
84QString QHelpGlobal::codecFromHtmlData(const QByteArray &data)
85{
86 const QString &head = QString::fromUtf8(str: data.constData(), size: qMin(a: 1000, b: data.size()));
87 int start = head.indexOf(s: QLatin1String("<meta"), from: 0, cs: Qt::CaseInsensitive);
88 if (start > 0) {
89 const QRegExp r(QLatin1String("charset=([^\"\\s]+)"));
90 while (start != -1) {
91 const int end = head.indexOf(c: QLatin1Char('>'), from: start) + 1;
92 if (end <= start)
93 break;
94 const QString &meta = head.mid(position: start, n: end - start).toLower();
95 if (r.indexIn(str: meta) != -1)
96 return r.cap(nth: 1);
97 start = head.indexOf(s: QLatin1String("<meta"), from: end,
98 cs: Qt::CaseInsensitive);
99 }
100 }
101 return QString();
102}
103
104QString QHelpGlobal::codecFromXmlData(const QByteArray &data)
105{
106 const QString head = QString::fromUtf8(str: data.constData(), size: qMin(a: 1000, b: data.size()));
107 const QRegExp encodingExp(QLatin1String("^\\s*<\\?xml version="
108 "\"\\d\\.\\d\" encoding=\"([^\"]+)\"\\?>.*"));
109 return encodingExp.exactMatch(str: head) ? encodingExp.cap(nth: 1) : QString();
110}
111

source code of qttools/src/assistant/help/qhelp_global.cpp