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132 lines
4.0 KiB
PHP
132 lines
4.0 KiB
PHP
<?php
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/*
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+-----------------------------------------------------------------------+
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| program/include/rcube_string_replacer.php |
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2009, Roundcube Dev. - Switzerland |
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| Licensed under the GNU GPL |
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| PURPOSE: |
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| Handle string replacements based on preg_replace_callback |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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$Id$
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*/
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/**
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* Helper class for string replacements based on preg_replace_callback
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*
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* @package Core
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*/
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class rcube_string_replacer
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{
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public static $pattern = '/##str_replacement\[([0-9]+)\]##/';
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public $mailto_pattern;
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public $link_pattern;
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private $values = array();
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function __construct()
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{
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// Simplified domain expression for UTF8 characters handling
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$utf_domain = '[^?&@"\'\\/()\s\r\t\n]+\\.[a-z]{2,5}';
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$url = '[a-z0-9%=#@+?.:;&\\/_~-]+';
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$this->link_pattern = "/([\w]+:\/\/|\Wwww\.)($utf_domain($url)?)/i";
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$this->mailto_pattern = "/("
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."[-\w!\#\$%&\'*+~\/^`|{}=]+(?:\.[-\w!\#\$%&\'*+~\/^`|{}=]+)*" // local-part
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."@$utf_domain" // domain-part
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."(\?$url)?" // e.g. ?subject=test...
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.")/i";
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}
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/**
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* Add a string to the internal list
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*
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* @param string String value
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* @return int Index of value for retrieval
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*/
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public function add($str)
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{
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$i = count($this->values);
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$this->values[$i] = $str;
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return $i;
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}
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/**
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* Build replacement string
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*/
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public function get_replacement($i)
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{
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return '##str_replacement['.$i.']##';
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}
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/**
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* Callback function used to build HTML links around URL strings
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*
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* @param array Matches result from preg_replace_callback
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* @return int Index of saved string value
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*/
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public function link_callback($matches)
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{
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$i = -1;
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$scheme = strtolower($matches[1]);
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if (preg_match('!^(http|ftp|file)s?://!', $scheme)) {
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$url = $matches[1] . $matches[2];
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$i = $this->add(html::a(array('href' => $url, 'target' => '_blank'), Q($url)));
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}
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else if (preg_match('/^(\W)www\.$/', $matches[1], $m)) {
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$url = 'www.' . $matches[2];
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$i = $this->add($m[1] . html::a(array('href' => 'http://' . $url, 'target' => '_blank'), Q($url)));
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}
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// Return valid link for recognized schemes, otherwise, return the unmodified string for unrecognized schemes.
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return $i >= 0 ? $this->get_replacement($i) : $matches[0];
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}
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/**
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* Callback function used to build mailto: links around e-mail strings
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*
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* @param array Matches result from preg_replace_callback
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* @return int Index of saved string value
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*/
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public function mailto_callback($matches)
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{
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$i = $this->add(html::a(array(
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'href' => 'mailto:' . $matches[1],
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'onclick' => "return ".JS_OBJECT_NAME.".command('compose','".JQ($matches[1])."',this)",
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),
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Q($matches[1])));
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return $i >= 0 ? $this->get_replacement($i) : '';
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}
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/**
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* Look up the index from the preg_replace matches array
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* and return the substitution value.
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*
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* @param array Matches result from preg_replace_callback
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* @return string Value at index $matches[1]
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*/
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public function replace_callback($matches)
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{
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return $this->values[$matches[1]];
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}
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/**
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* Replace substituted strings with original values
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*/
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public function resolve($str)
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{
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return preg_replace_callback(self::$pattern, array($this, 'replace_callback'), $str);
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}
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} |