--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/includes/wikiengine/Parse/Mediawiki/Prefilter.php	Wed Jun 13 16:07:17 2007 -0400
@@ -0,0 +1,78 @@
+<?php
+
+/**
+* 
+* "Pre-filter" the source text.
+* 
+* @category Text
+* 
+* @package Text_Wiki
+* 
+* @author Paul M. Jones <pmjones@php.net>
+* 
+* @license LGPL
+* 
+* @version $Id: Prefilter.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $
+* 
+*/
+
+/**
+* 
+* "Pre-filter" the source text.
+* 
+* Convert DOS and Mac line endings to Unix, concat lines ending in a
+* backslash \ with the next line, convert tabs to 4-spaces, add newlines
+* to the top and end of the source text, compress 3 or more newlines to
+* 2 newlines.
+*
+* @category Text
+* 
+* @package Text_Wiki
+* 
+* @author Paul M. Jones <pmjones@php.net>
+* 
+*/
+
+class Text_Wiki_Parse_Prefilter extends Text_Wiki_Parse {
+    
+    
+    /**
+    * 
+    * Simple parsing method.
+    *
+    * @access public
+    * 
+    */
+    
+    function parse()
+    {
+        // convert DOS line endings
+        $this->wiki->source = str_replace("\r\n", "\n",
+            $this->wiki->source);
+        
+        // convert Macintosh line endings
+        $this->wiki->source = str_replace("\r", "\n",
+            $this->wiki->source);
+        
+        // concat lines ending in a backslash
+        $this->wiki->source = str_replace("\\\n", "",
+            $this->wiki->source);
+        
+        // convert tabs to four-spaces
+        $this->wiki->source = str_replace("\t", "    ",
+            $this->wiki->source);
+           
+        // add extra newlines at the top and end; this
+        // seems to help many rules.
+        $this->wiki->source = "\n" . $this->wiki->source . "\n\n";
+        
+        // finally, compress all instances of 3 or more newlines
+        // down to two newlines.
+        $find = "/\n{3,}/m";
+        $replace = "\n\n";
+        $this->wiki->source = preg_replace($find, $replace,
+            $this->wiki->source);
+    }
+
+}
+?>
\ No newline at end of file