includes/wikiengine/Parse/Default/Revise.php
author Dan
Fri, 05 Oct 2007 01:57:00 -0400
changeset 161 e1a22031b5bd
parent 1 fe660c52c48f
permissions -rw-r--r--
Major revamps to the template parser. Fixed a few security holes that could allow PHP to be injected in untimely places in TPL code. Improved Ux for XSS attempt in tplWikiFormat. Documented many functions. Backported much cleaner parser from 2.0 branch. Beautified a lot of code in the depths of the template class. Pretty much a small-scale Extreme Makeover.

<?php

/**
* 
* Parses for text marked as revised (insert/delete).
* 
* @category Text
* 
* @package Text_Wiki
* 
* @author Paul M. Jones <pmjones@php.net>
* 
* @license LGPL
* 
* @version $Id: Revise.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $
* 
*/

/**
* 
* Parses for text marked as revised (insert/delete).
*
* @category Text
* 
* @package Text_Wiki
* 
* @author Paul M. Jones <pmjones@php.net>
* 
*/

class Text_Wiki_Parse_Revise extends Text_Wiki_Parse {
    
    
    /**
    * 
    * The regular expression used to parse the source text and find
    * matches conforming to this rule.  Used by the parse() method.
    * 
    * @access public
    * 
    * @var string
    * 
    * @see parse()
    * 
    */
    
    var $regex = "/\@\@({*?.*}*?)\@\@/U";
    
    
    /**
    * 
    * Config options.
    * 
    * @access public
    * 
    * @var array
    *
    */
    
    var $conf = array(
        'delmark' => '---',
        'insmark' => '+++'
    );
    
    
    /**
    * 
    * Generates a replacement for the matched text.  Token options are:
    * 
    * 'type' => ['start'|'end'] The starting or ending point of the
    * inserted text.  The text itself is left in the source.
    * 
    * @access public
    *
    * @param array &$matches The array of matches from parse().
    *
    * @return string A pair of delimited tokens to be used as a
    * placeholder in the source text surrounding the teletype text.
    *
    */
    
    function process(&$matches)
    {
        $output = '';
        $src = $matches[1];
        $delmark = $this->getConf('delmark'); // ---
        $insmark = $this->getConf('insmark'); // +++
        
        // '---' must be before '+++' (if they both appear)
        $del = strpos($src, $delmark);
        $ins = strpos($src, $insmark);
        
        // if neither is found, return right away
        if ($del === false && $ins === false) {
            return $matches[0];
        }
        
        // handle text to be deleted
        if ($del !== false) {
            
            // move forward to the end of the deletion mark
            $del += strlen($delmark);
            
            if ($ins === false) {
                // there is no insertion text following
                $text = substr($src, $del);
            } else {
                // there is insertion text following,
                // mitigate the length
                $text = substr($src, $del, $ins - $del);
            }
            
            $output .= $this->wiki->addToken(
                $this->rule, array('type' => 'del_start')
            );
            
            $output .= $text;
            
            $output .= $this->wiki->addToken(
                $this->rule, array('type' => 'del_end')
            );
        }
        
        // handle text to be inserted
        if ($ins !== false) {
            
            // move forward to the end of the insert mark
            $ins += strlen($insmark);
            $text = substr($src, $ins);
            
            $output .= $this->wiki->addToken(
                $this->rule, array('type' => 'ins_start')
            );
            
            $output .= $text;
            
            $output .= $this->wiki->addToken(
                $this->rule, array('type' => 'ins_end')
            );
        }
        
        return $output;
    }
}
?>