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<?php
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// $Id: Italic.php,v 1.1 2005-01-20 19:43:20 jpm Exp $
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/**
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*
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* This class implements a Text_Wiki_Parse to find source text marked for
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* emphasis (italics) as defined by text surrounded by two single-quotes.
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* On parsing, the text itself is left in place, but the starting and ending
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* instances of two single-quotes are replaced with tokens.
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*
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* @author Paul M. Jones <pmjones@ciaweb.net>
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*
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* @package Text_Wiki
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*
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*/
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class Text_Wiki_Parse_Italic extends Text_Wiki_Parse {
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    /**
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    *
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    * The regular expression used to parse the source text and find
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    * matches conforming to this rule.  Used by the parse() method.
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    *
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    * @access public
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    *
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    * @var string
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    *
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    * @see parse()
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    *
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    */
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    var $regex = "/''(()|[^'].*)''/U";
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    /**
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    *
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    * Generates a replacement for the matched text.  Token options are:
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    *
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    * 'type' => ['start'|'end'] The starting or ending point of the
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    * emphasized text.  The text itself is left in the source.
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    *
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    * @access public
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    *
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    * @param array &$matches The array of matches from parse().
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    *
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    * @return string A pair of delimited tokens to be used as a
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    * placeholder in the source text surrounding the text to be
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    * emphasized.
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    *
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    */
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    function process(&$matches)
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    {
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        $start = $this->wiki->addToken(
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            $this->rule, array('type' => 'start')
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        );
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        $end = $this->wiki->addToken(
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            $this->rule, array('type' => 'end')
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        );
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        return $start . $matches[1] . $end;
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    }
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}
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?>