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
|
<?php
/**
* GeSHi - Generic Syntax Highlighter
*
* For information on how to use GeSHi, please consult the documentation
* found in the docs/ directory, or online at http://geshi.org/docs/
*
* This file is part of GeSHi.
*
* GeSHi is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GeSHi 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GeSHi; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* You can view a copy of the GNU GPL in the COPYING file that comes
* with GeSHi, in the docs/ directory.
*
* @package core
* @author Nigel McNie <nigel@geshi.org>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL
* @copyright (C) 2005 Nigel McNie
* @version 1.1.0
*
*/
/**
* The GeSHiStringContext class. This class extends GeSHiContext to handle
* the concept of escape characters that strings often use.
*
* @package core
* @author Nigel McNie <nigel@geshi.org>
* @since 1.1.0
* @version 1.1.0
* @see GeSHiContext
*/
class GeSHiStringContext extends GeSHiContext
{
/**#@-
* @access private
*/
var $_escapeCharacters;
// Characters that should be escaped
var $_charsToEscape;
/**
* This is used by the 'DELIM' "character" in the _charsToEscape array. We
* abuse the fact that _addParseData will be called right after _getContextEndData
* if the context is to be passed
*/
var $_lastOpener;
/**#@-*/
/**
* GetContextEndData
*/
function _getContextEndData ($code, $context_open_key, $context_opener)
{
geshi_dbg('GeSHiStringContext::_getContextEndData(' . $this->_contextName . ', ' . $context_open_key . ', ' . $context_opener . ')', GESHI_DBG_API | GESHI_DBG_PARSE);
$this->_lastOpener = $context_opener;
foreach ($this->_contextDelimiters[$context_open_key][1] as $ender) {
geshi_dbg(' Checking ender: ' . $ender, GESHI_DBG_PARSE);
// Prepare ender regexes if needed
$ender = $this->_substitutePlaceholders($ender);
geshi_dbg(' ender after substitution: ' . $ender, GESHI_DBG_PARSE);
$pos = 0;
while (true) {
$pos = geshi_get_position($code, $ender, $pos);
if (false === $pos) {
break;
}
$len = $pos['len'];
$pos = $pos['pos'];
$possible_string = substr($code, 0, $pos);
geshi_dbg(' String might be: ' . $possible_string, GESHI_DBG_PARSE);
foreach ($this->_escapeCharacters as $escape_char) {
// remove escaped escape characters
$possible_string = str_replace($escape_char . $escape_char, '', $possible_string);
}
geshi_dbg(' String with double escapes removed: ' . $possible_string, GESHI_DBG_PARSE);
//@todo [blocking 1.1.1] possible bug: only last escape character checked here
if (substr($possible_string, -1) != $escape_char) {
// We may have found the correct ender. If we haven't, then this string
// never ends and we will set the end position to the length of the code
// substr($code, $pos, 1) == $ender
$endpos = geshi_get_position($code, $ender, $pos);
geshi_dbg(' position of ender: ' . $endpos['pos'], GESHI_DBG_PARSE);
$pos = ($pos && $endpos['pos'] === $pos) ? $pos : strlen($code);
return array('pos' => $pos, 'len' => $len, 'dlm' => $ender);
}
// else, start further up
++$pos;
}
}
return false;
}
/**
* Overrides addParseData to add escape characters also
*/
function _addParseData ($code, $first_char_of_next_context = '')
{
geshi_dbg('GeSHiStringContext::_addParseData(' . substr($code, 0, 15) . '...)', GESHI_DBG_PARSE);
$length = strlen($code);
$string = '';
for ($i = 0; $i < $length; $i++) {
$char = substr($code, $i, 1);
geshi_dbg('Char: ' . $char, GESHI_DBG_PARSE);
$skip = false;
foreach ($this->_escapeCharacters as $escape_char) {
$len = 1;
if ($char == $escape_char && (false !== ($len = $this->_shouldBeEscaped(substr($code, $i + 1))))) {
geshi_dbg('Match: len = ' . $len, GESHI_DBG_PARSE);
if ($string) {
$this->_styler->addParseData($string, $this->_contextName);
$string = '';
}
// Needs a better name than /esc
$this->_styler->addParseData($escape_char . substr($code, $i + 1, $len), $this->_contextName . '/esc');
// FastForward
$i += $len;
$skip = true;
break;
}
}
if (!$skip) {
$string .= $char;
}
}
if ($string) {
$this->_styler->addParseData($string, $this->_contextName);
}
}
/**
* Checks whether the character(s) at the start of the parameter string are
* characters that should be escaped.
*
* @param string The string to check the beginning of for escape characters
* @return int|false The length of the escape character sequence, else false
*/
function _shouldBeEscaped ($code)
{
// Feature: If 'DELIM' is one of the "characters" in the _charsToEscape array, then it is
// replaced by the context opener
$chars_to_escape = str_replace('DELIM', $this->_lastOpener, $this->_charsToEscape);
geshi_dbg('Checking: ' . substr($code, 0, 15), GESHI_DBG_PARSE);
foreach ($chars_to_escape as $match) {
if ('REGEX' != substr($match, 0, 5)) {
geshi_dbg('Test: ' . $match, GESHI_DBG_PARSE);
if (substr($code, 0, 1) == $match) {
return 1;
}
} else {
geshi_dbg(' Testing via regex: ' . $match . '... ', GESHI_DBG_PARSE, false);
$data = geshi_get_position($code, $match, 0);
if (0 === $data['pos']) {
geshi_dbg('match, data = ' . print_r($data, true), GESHI_DBG_PARSE);
return $data['len'];
}
geshi_dbg('no match', GESHI_DBG_PARSE);
}
}
// No matches...
return false;
}
}
?>
|
