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|
<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcube_string_replacer.php |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2009, RoundCube Dev. - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Handle string replacements based on preg_replace_callback |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id: $
*/
/**
* 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()
{
$url_chars = 'a-z0-9_\-\+\*\$\/&%=@#:;';
$url_chars_within = '\?\.~,!';
$this->link_pattern = "/([\w]+:\/\/|\Wwww\.)([a-z0-9\-\.]+[a-z]{2,4}([$url_chars$url_chars_within]*[$url_chars])?)/i";
$this->mailto_pattern = "/([a-z0-9][a-z0-9\-\.\+\_]*@[a-z0-9]([a-z0-9\-][.]?)*[a-z0-9]\\.[a-z]{2,5})/i";
}
/**
* Add a string to the internal list
*
* @param string String value
* @return int Index of value for retrieval
*/
public function add($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];
$i = $this->add(html::a(array('href' => $url, 'target' => '_blank'), Q($url)));
}
else if (preg_match('/^(\W)www\.$/', $matches[1], $m)) {
$url = 'www.' . $matches[2];
$i = $this->add($m[1] . html::a(array('href' => 'http://' . $url, 'target' => '_blank'), Q($url)));
}
// 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)
{
$i = $this->add(html::a(array(
'href' => 'mailto:' . $matches[1],
'onclick' => "return ".JS_OBJECT_NAME.".command('compose','".JQ($matches[1])."',this)",
),
Q($matches[1])));
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);
}
}
|
