includes/wikiengine/Parse/Default/Wikilink.php
author Dan
Thu, 20 Dec 2007 22:23:07 -0500
changeset 328 dc838fd61a06
parent 1 fe660c52c48f
permissions -rw-r--r--
Added initial avatar support. Currently rather feature complete except for admin controls for avatar.
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<?php
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/**
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*
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* Parse for links to wiki pages.
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*
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* @category Text
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*
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* @package Text_Wiki
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*
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* @author Paul M. Jones <pmjones@php.net>
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*
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* @license LGPL
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*
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* @version $Id: Wikilink.php,v 1.5 2005/09/14 14:29:38 toggg Exp $
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*
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*/
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/**
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*
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* Parse for links to wiki pages.
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*
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* Wiki page names are typically in StudlyCapsStyle made of
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* WordsSmashedTogether.
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*
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* You can also create described links to pages in this style:
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* [WikiPageName nice text link to use for display]
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*
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* The token options for this rule are:
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*
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* 'page' => the wiki page name.
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*
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* 'text' => the displayed link text.
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*
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* 'anchor' => a named anchor on the target wiki page.
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*
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* @category Text
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*
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* @package Text_Wiki
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*
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* @author Paul M. Jones <pmjones@php.net>
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*
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*/
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class Text_Wiki_Parse_Wikilink extends Text_Wiki_Parse {
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    var $conf = array (
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    	'ext_chars' => false
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    );
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    /**
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    *
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    * Constructor.
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    *
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    * We override the Text_Wiki_Parse constructor so we can
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    * explicitly comment each part of the $regex property.
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    *
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    * @access public
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    *
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    * @param object &$obj The calling "parent" Text_Wiki object.
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    *
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    */
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    function Text_Wiki_Parse_Wikilink(&$obj)
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    {
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        parent::Text_Wiki_Parse($obj);
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        if ($this->getConf('ext_chars')) {
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        	// use an extended character set; this should
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        	// allow for umlauts and so on.  taken from the
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        	// Tavi project defaults.php file.
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			$upper = "A-Z\xc0-\xde";
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			$lower = "a-z0-9\xdf-\xfe";
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			$either = "A-Za-z0-9\xc0-\xfe";
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		} else {
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			// the default character set, should be fine
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			// for most purposes.
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			$upper = "A-Z";
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			$lower = "a-z0-9";
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			$either = "A-Za-z0-9";
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		}
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        // build the regular expression for finding WikiPage names.
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        $this->regex =
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            "(!?" .            // START WikiPage pattern (1)
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            "[$upper]" .       // 1 upper
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            "[$either]*" .     // 0+ alpha or digit
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            "[$lower]+" .      // 1+ lower or digit
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            "[$upper]" .       // 1 upper
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            "[$either]*" .     // 0+ or more alpha or digit
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            ")" .              // END WikiPage pattern (/1)
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            "((\#" .           // START Anchor pattern (2)(3)
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            "[$either]" .      // 1 alpha
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            "(" .              // start sub pattern (4)
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            "[-_$either:.]*" . // 0+ dash, alpha, digit, underscore, colon, dot
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            "[-_$either]" .    // 1 dash, alpha, digit, or underscore
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            ")?)?)";           // end subpatterns (/4)(/3)(/2)
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    }
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    /**
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    *
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    * First parses for described links, then for standalone links.
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    *
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    * @access public
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    *
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    * @return void
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    *
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    */
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    function parse()
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    {
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        // described wiki links
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        $tmp_regex = '/\[' . $this->regex . ' (.+?)\]/';
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        $this->wiki->source = preg_replace_callback(
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            $tmp_regex,
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            array(&$this, 'processDescr'),
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            $this->wiki->source
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        );
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        // standalone wiki links
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        if ($this->getConf('ext_chars')) {
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			$either = "A-Za-z0-9\xc0-\xfe";
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		} else {
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			$either = "A-Za-z0-9";
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		}
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        $tmp_regex = "/(^|[^{$either}\-_]){$this->regex}/";
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        $this->wiki->source = preg_replace_callback(
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            $tmp_regex,
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            array(&$this, 'process'),
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            $this->wiki->source
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        );
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    }
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    /**
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    *
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    * Generate a replacement for described links.
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    *
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    * @access public
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    *
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    * @param array &$matches The array of matches from parse().
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    *
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    * @return A delimited token to be used as a placeholder in
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    * the source text, plus any text priot to the match.
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    *
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    */
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    function processDescr(&$matches)
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    {
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        // set the options
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        $options = array(
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            'page'   => $matches[1],
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            'text'   => $matches[5],
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            'anchor' => $matches[3]
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        );
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        // create and return the replacement token and preceding text
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        return $this->wiki->addToken($this->rule, $options); // . $matches[7];
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    }
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    /**
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    *
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    * Generate a replacement for standalone links.
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    *
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    *
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    * @access public
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    *
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    * @param array &$matches The array of matches from parse().
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    *
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    * @return A delimited token to be used as a placeholder in
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    * the source text, plus any text prior to the match.
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    *
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    */
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    function process(&$matches)
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    {
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        // when prefixed with !, it's explicitly not a wiki link.
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        // return everything as it was.
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        if ($matches[2]{0} == '!') {
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            return $matches[1] . substr($matches[2], 1) . $matches[3];
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        }
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        // set the options
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        $options = array(
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            'page' => $matches[2],
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            'text' => $matches[2] . $matches[3],
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            'anchor' => $matches[3]
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        );
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        // create and return the replacement token and preceding text
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        return $matches[1] . $this->wiki->addToken($this->rule, $options);
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    }
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}
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?>