include/Text/Wiki/Parse/Default/Revise.php

   1 <?php
   2
   3 /**
   4 *
   5 * Parses for text marked as revised (insert/delete).
   6 *
   7 * @category Text
   8 *
   9 * @package Text_Wiki
  10 *
  11 * @author Paul M. Jones <pmjones@php.net>
  12 *
  13 * @license LGPL
  14 *
  15 * @version $Id: Revise.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $
  16 *
  17 */
  18
  19 /**
  20 *
  21 * Parses for text marked as revised (insert/delete).
  22 *
  23 * @category Text
  24 *
  25 * @package Text_Wiki
  26 *
  27 * @author Paul M. Jones <pmjones@php.net>
  28 *
  29 */
  30
  31 class Text_Wiki_Parse_Revise extends Text_Wiki_Parse {
  32
  33
  34     /**
  35     *
  36     * The regular expression used to parse the source text and find
  37     * matches conforming to this rule.  Used by the parse() method.
  38     *
  39     * @access public
  40     *
  41     * @var string
  42     *
  43     * @see parse()
  44     *
  45     */
  46
  47     var $regex = "/\@\@({*?.*}*?)\@\@/U";
  48
  49
  50     /**
  51     *
  52     * Config options.
  53     *
  54     * @access public
  55     *
  56     * @var array
  57     *
  58     */
  59
  60     var $conf = array(
  61         'delmark' => '---',
  62         'insmark' => '+++'
  63     );
  64
  65
  66     /**
  67     *
  68     * Generates a replacement for the matched text.  Token options are:
  69     *
  70     * 'type' => ['start'|'end'] The starting or ending point of the
  71     * inserted text.  The text itself is left in the source.
  72     *
  73     * @access public
  74     *
  75     * @param array &$matches The array of matches from parse().
  76     *
  77     * @return string A pair of delimited tokens to be used as a
  78     * placeholder in the source text surrounding the teletype text.
  79     *
  80     */
  81
  82     function process(&$matches)
  83     {
  84         $output = '';
  85         $src = $matches[1];
  86         $delmark = $this->getConf('delmark'); // ---
  87         $insmark = $this->getConf('insmark'); // +++
  88
  89         // '---' must be before '+++' (if they both appear)
  90         $del = strpos($src, $delmark);
  91         $ins = strpos($src, $insmark);
  92
  93         // if neither is found, return right away
  94         if ($del === false && $ins === false) {
  95             return $matches[0];
  96         }
  97
  98         // handle text to be deleted
  99         if ($del !== false) {
 100
 101             // move forward to the end of the deletion mark
 102             $del += strlen($delmark);
 103
 104             if ($ins === false) {
 105                 // there is no insertion text following
 106                 $text = substr($src, $del);
 107             } else {
 108                 // there is insertion text following,
 109                 // mitigate the length
 110                 $text = substr($src, $del, $ins - $del);
 111             }
 112
 113             $output .= $this->wiki->addToken(
 114                 $this->rule, array('type' => 'del_start')
 115             );
 116
 117             $output .= $text;
 118
 119             $output .= $this->wiki->addToken(
 120                 $this->rule, array('type' => 'del_end')
 121             );
 122         }
 123
 124         // handle text to be inserted
 125         if ($ins !== false) {
 126
 127             // move forward to the end of the insert mark
 128             $ins += strlen($insmark);
 129             $text = substr($src, $ins);
 130
 131             $output .= $this->wiki->addToken(
 132                 $this->rule, array('type' => 'ins_start')
 133             );
 134
 135             $output .= $text;
 136
 137             $output .= $this->wiki->addToken(
 138                 $this->rule, array('type' => 'ins_end')
 139             );
 140         }
 141
 142         return $output;
 143     }
 144 }
 145 ?>