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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
<?php
/**
* PHPPowerPoint
*
* Copyright (c) 2009 - 2010 PHPPowerPoint
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPPowerPoint
* @package PHPPowerPoint_Shared
* @copyright Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 0.1.0, 2009-04-27
*/
/**
* PHPPowerPoint_Shared_String
*
* @category PHPPowerPoint
* @package PHPPowerPoint_Shared
* @copyright Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
*/
class PHPPowerPoint_Shared_String
{
/**
* Control characters array
*
* @var string[]
*/
private static $_controlCharacters = array();
/**
* Is mbstring extension avalable?
*
* @var boolean
*/
private static $_isMbstringEnabled;
/**
* Is iconv extension avalable?
*
* @var boolean
*/
private static $_isIconvEnabled;
/**
* Build control characters array
*/
private static function _buildControlCharacters() {
for ($i = 0; $i <= 19; ++$i) {
if ($i != 9 && $i != 10 && $i != 13) {
$find = '_x' . sprintf('%04s' , strtoupper(dechex($i))) . '_';
$replace = chr($i);
self::$_controlCharacters[$find] = $replace;
}
}
}
/**
* Get whether mbstring extension is available
*
* @return boolean
*/
public static function getIsMbstringEnabled()
{
if (isset(self::$_isMbstringEnabled)) {
return self::$_isMbstringEnabled;
}
self::$_isMbstringEnabled = function_exists('mb_convert_encoding') ?
true : false;
return self::$_isMbstringEnabled;
}
/**
* Get whether iconv extension is available
*
* @return boolean
*/
public static function getIsIconvEnabled()
{
if (isset(self::$_isIconvEnabled)) {
return self::$_isIconvEnabled;
}
self::$_isIconvEnabled = function_exists('iconv') ?
true : false;
return self::$_isIconvEnabled;
}
/**
* Convert from OpenXML escaped control character to PHP control character
*
* Excel 2007 team:
* ----------------
* That's correct, control characters are stored directly in the shared-strings table.
* We do encode characters that cannot be represented in XML using the following escape sequence:
* _xHHHH_ where H represents a hexadecimal character in the character's value...
* So you could end up with something like _x0008_ in a string (either in a cell value (<v>)
* element or in the shared string <t> element.
*
* @param string $value Value to unescape
* @return string
*/
public static function ControlCharacterOOXML2PHP($value = '') {
if(empty(self::$_controlCharacters)) {
self::_buildControlCharacters();
}
return str_replace( array_keys(self::$_controlCharacters), array_values(self::$_controlCharacters), $value );
}
/**
* Convert from PHP control character to OpenXML escaped control character
*
* Excel 2007 team:
* ----------------
* That's correct, control characters are stored directly in the shared-strings table.
* We do encode characters that cannot be represented in XML using the following escape sequence:
* _xHHHH_ where H represents a hexadecimal character in the character's value...
* So you could end up with something like _x0008_ in a string (either in a cell value (<v>)
* element or in the shared string <t> element.
*
* @param string $value Value to escape
* @return string
*/
public static function ControlCharacterPHP2OOXML($value = '') {
if(empty(self::$_controlCharacters)) {
self::_buildControlCharacters();
}
return str_replace( array_values(self::$_controlCharacters), array_keys(self::$_controlCharacters), $value );
}
/**
* Check if a string contains UTF8 data
*
* @param string $value
* @return boolean
*/
public static function IsUTF8($value = '') {
return utf8_encode(utf8_decode($value)) === $value;
}
/**
* Formats a numeric value as a string for output in various output writers
*
* @param mixed $value
* @return string
*/
public static function FormatNumber($value) {
return number_format($value, 2, '.', '');
}
/**
* Converts a UTF-8 string into BIFF8 Unicode string data (8-bit string length)
* Writes the string using uncompressed notation, no rich text, no Asian phonetics
* If mbstring extension is not available, ASCII is assumed, and compressed notation is used
* although this will give wrong results for non-ASCII strings
* see OpenOffice.org's Documentation of the Microsoft Excel File Format, sect. 2.5.3
*
* @param string $value UTF-8 encoded string
* @return string
*/
public static function UTF8toBIFF8UnicodeShort($value)
{
// character count
$ln = self::CountCharacters($value, 'UTF-8');
// option flags
$opt = (self::getIsMbstringEnabled() || self::getIsIconvEnabled()) ?
0x0001 : 0x0000;
// characters
$chars = self::ConvertEncoding($value, 'UTF-16LE', 'UTF-8');
$data = pack('CC', $ln, $opt) . $chars;
return $data;
}
/**
* Converts a UTF-8 string into BIFF8 Unicode string data (16-bit string length)
* Writes the string using uncompressed notation, no rich text, no Asian phonetics
* If mbstring extension is not available, ASCII is assumed, and compressed notation is used
* although this will give wrong results for non-ASCII strings
* see OpenOffice.org's Documentation of the Microsoft Excel File Format, sect. 2.5.3
*
* @param string $value UTF-8 encoded string
* @return string
*/
public static function UTF8toBIFF8UnicodeLong($value)
{
// character count
$ln = self::CountCharacters($value, 'UTF-8');
// option flags
$opt = (self::getIsMbstringEnabled() || self::getIsIconvEnabled()) ?
0x0001 : 0x0000;
// characters
$chars = self::ConvertEncoding($value, 'UTF-16LE', 'UTF-8');
$data = pack('vC', $ln, $opt) . $chars;
return $data;
}
/**
* Convert string from one encoding to another. First try mbstring, then iconv, or no convertion
*
* @param string $value
* @param string $to Encoding to convert to, e.g. 'UTF-8'
* @param string $from Encoding to convert from, e.g. 'UTF-16LE'
* @return string
*/
public static function ConvertEncoding($value, $to, $from)
{
if (self::getIsMbstringEnabled()) {
$value = mb_convert_encoding($value, $to, $from);
return $value;
}
if (self::getIsIconvEnabled()) {
$value = iconv($from, $to, $value);
return $value;
}
// else, no conversion
return $value;
}
/**
* Get character count. First try mbstring, then iconv, finally strlen
*
* @param string $value
* @param string $enc Encoding
* @return int Character count
*/
public static function CountCharacters($value, $enc = 'UTF-8')
{
if (self::getIsMbstringEnabled()) {
$count = mb_strlen($value, $enc);
return $count;
}
if (self::getIsIconvEnabled()) {
$count = iconv_strlen($value, $enc);
return $count;
}
// else strlen
$count = strlen($value);
return $count;
}
}
|
