1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
This file was taken from the KDE 4.x libraries and backported to Qt 3.
Copyright (C) 1999 Lars Knoll (knoll@mpi-hd.mpg.de)
Copyright (C) 2007 Nick Shaforostoff (shafff@ukr.net)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef ENCODINGDETECTOR_H
#define ENCODINGDETECTOR_H
#include <tqstring.h>
class QTextCodec;
class QTextDecoder;
class EncodingDetectorPrivate;
/**
* @short Provides encoding detection capabilities.
*
* Searches for encoding declaration inside raw data -- meta and xml tags.
* In the case it can't find it, uses heuristics for specified language.
*
* If it finds unicode BOM marks, it changes encoding regardless of what the user has told
*
* Intended lifetime of the object: one instance per document.
*
* Typical use:
* \code
* TQByteArray data;
* ...
* EncodingDetector detector;
* detector.setAutoDetectLanguage(EncodingDetector::Cyrillic);
* TQString out=detector.decode(data);
* \endcode
*
*
* Do not mix decode() with decodeWithBuffering()
*
* @short Guess encoding of char array
*
*/
class EncodingDetector
{
public:
enum EncodingChoiceSource
{
DefaultEncoding,
AutoDetectedEncoding,
BOM,
EncodingFromXMLHeader,
EncodingFromMetaTag,
EncodingFromHTTPHeader,
UserChosenEncoding
};
enum AutoDetectScript
{
None,
SemiautomaticDetection,
Arabic,
Baltic,
CentralEuropean,
ChineseSimplified,
ChineseTraditional,
Cyrillic,
Greek,
Hebrew,
Japanese,
Korean,
NorthernSaami,
SouthEasternEurope,
Thai,
Turkish,
Unicode,
WesternEuropean
};
/**
* Default codec is latin1 (as html spec says), EncodingChoiceSource is default, AutoDetectScript=Semiautomatic
*/
EncodingDetector();
/**
* Allows to set Default codec, EncodingChoiceSource, AutoDetectScript
*/
EncodingDetector(TQTextCodec* codec, EncodingChoiceSource source, AutoDetectScript script=None);
~EncodingDetector();
//const TQTextCodec* codec() const;
/**
* @returns true if specified encoding was recognized
*/
bool setEncoding(const char *encoding, EncodingChoiceSource type);
/**
* Convenience method.
* @returns mime name of detected encoding
*/
const char* encoding() const;
bool visuallyOrdered() const;
// void setAutoDetectLanguage( const TQString& );
// const TQString& autoDetectLanguage() const;
void setAutoDetectLanguage( AutoDetectScript );
AutoDetectScript autoDetectLanguage() const;
EncodingChoiceSource encodingChoiceSource() const;
/**
* Analyze text data.
* @returns true if there was enough data for accurate detection
*/
bool analyze( const char *data, int len );
/**
* Analyze text data.
* @returns true if there was enough data for accurate detection
*/
bool analyze( const TQByteArray &data );
/**
* Takes lang name _after_ it were i18n()'ed
*/
static AutoDetectScript scriptForName(const TQString& lang);
static TQString nameForScript(AutoDetectScript);
static AutoDetectScript scriptForLanguageCode(const TQString &lang);
static bool hasAutoDetectionForScript(AutoDetectScript);
protected:
/**
* Check if we are really utf8. Taken from kate
*
* @returns true if current encoding is utf8 and the text cannot be in this encoding
*
* Please somebody read http://de.wikipedia.org/wiki/UTF-8 and check this code...
*/
bool errorsIfUtf8 (const char* data, int length);
/**
* @returns TQTextDecoder for detected encoding
*/
TQTextDecoder* decoder();
private:
EncodingDetectorPrivate* const d;
};
#endif
|
