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
|
<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcube_string_replacer.php |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2009, The Roundcube Dev Team |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Handle string replacements based on preg_replace_callback |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id: rcube_string_replacer.php 5481 2011-11-24 07:53:00Z alec $
*/
/**
* Helper class for string replacements based on preg_replace_callback
*
* @package Core
*/
class rcube_string_replacer
{
public static $pattern = '/##str_replacement\[([0-9]+)\]##/';
public $mailto_pattern;
public $link_pattern;
private $values = array();
function __construct()
{
// Simplified domain expression for UTF8 characters handling
// Support unicode/punycode in top-level domain part
$utf_domain = '[^?&@"\'\\/()\s\r\t\n]+\\.([^\\x00-\\x2f\\x3b-\\x40\\x5b-\\x60\\x7b-\\x7f]{2,}|xn--[a-z0-9]{2,})';
$url1 = '.:;,';
$url2 = 'a-z0-9%=#@+?!&\\/_~\\[\\]{}-';
$this->link_pattern = "/([\w]+:\/\/|\Wwww\.)($utf_domain([$url1]?[$url2]+)*)/i";
$this->mailto_pattern = "/("
."[-\w!\#\$%&\'*+~\/^`|{}=]+(?:\.[-\w!\#\$%&\'*+~\/^`|{}=]+)*" // local-part
."@$utf_domain" // domain-part
."(\?[$url1$url2]+)?" // e.g. ?subject=test...
.")/i";
}
/**
* Add a string to the internal list
*
* @param string String value
* @return int Index of value for retrieval
*/
public function add($str)
{
$i = count($this->values);
$this->values[$i] = $str;
return $i;
}
/**
* Build replacement string
*/
public function get_replacement($i)
{
return '##str_replacement['.$i.']##';
}
/**
* Callback function used to build HTML links around URL strings
*
* @param array Matches result from preg_replace_callback
* @return int Index of saved string value
*/
public function link_callback($matches)
{
$i = -1;
$scheme = strtolower($matches[1]);
if (preg_match('!^(http|ftp|file)s?://!', $scheme)) {
$url = $matches[1] . $matches[2];
}
else if (preg_match('/^(\W)www\.$/', $matches[1], $m)) {
$url = 'www.' . $matches[2];
$url_prefix = 'http://';
$prefix = $m[1];
}
if ($url) {
$suffix = $this->parse_url_brackets($url);
$i = $this->add($prefix . html::a(array(
'href' => $url_prefix . $url,
'target' => '_blank'
), Q($url)) . $suffix);
}
// Return valid link for recognized schemes, otherwise, return the unmodified string for unrecognized schemes.
return $i >= 0 ? $this->get_replacement($i) : $matches[0];
}
/**
* Callback function used to build mailto: links around e-mail strings
*
* @param array Matches result from preg_replace_callback
* @return int Index of saved string value
*/
public function mailto_callback($matches)
{
$href = $matches[1];
$suffix = $this->parse_url_brackets($href);
$i = $this->add(html::a(array(
'href' => 'mailto:' . $href,
'onclick' => "return ".JS_OBJECT_NAME.".command('compose','".JQ($href)."',this)",
), Q($href)) . $suffix);
return $i >= 0 ? $this->get_replacement($i) : '';
}
/**
* Look up the index from the preg_replace matches array
* and return the substitution value.
*
* @param array Matches result from preg_replace_callback
* @return string Value at index $matches[1]
*/
public function replace_callback($matches)
{
return $this->values[$matches[1]];
}
/**
* Replace substituted strings with original values
*/
public function resolve($str)
{
return preg_replace_callback(self::$pattern, array($this, 'replace_callback'), $str);
}
/**
* Fixes bracket characters in URL handling
*/
public static function parse_url_brackets(&$url)
{
// #1487672: special handling of square brackets,
// URL regexp allows [] characters in URL, for example:
// "http://example.com/?a[b]=c". However we need to handle
// properly situation when a bracket is placed at the end
// of the link e.g. "[http://example.com]"
if (preg_match('/(\\[|\\])/', $url)) {
$in = false;
for ($i=0, $len=strlen($url); $i<$len; $i++) {
if ($url[$i] == '[') {
if ($in)
break;
$in = true;
}
else if ($url[$i] == ']') {
if (!$in)
break;
$in = false;
}
}
if ($i<$len) {
$suffix = substr($url, $i);
$url = substr($url, 0, $i);
}
}
return $suffix;
}
}
|
