<?php

/**

*

* Parses for image placement.

*

* @category Text

*

* @package Text_Wiki

*

* @author Paul M. Jones <pmjones@php.net>

*

* @license LGPL

*

* @version $Id: Image.php,v 1.5 2005/09/12 11:34:44 toggg Exp $

*

*/

/**

*

* Parses for image placement.

*

* @category Text

*

* @package Text_Wiki

*

* @author Paul M. Jones <pmjones@php.net>

*

*/

class Text_Wiki_Parse_Image extends Text_Wiki_Parse {

    /**

     * URL schemes recognized by this rule.

     *

     * @access public

     * @var array

    */

    var $conf = array(

        'schemes' => 'http|https|ftp|gopher|news',

        'host_regexp' => '(?:[^.\s/"\'<\\\#delim#\ca-\cz]+\.)*[a-z](?:[-a-z0-9]*[a-z0-9])?\.?',

        'path_regexp' => '(?:/[^\s"<\\\#delim#\ca-\cz]*)?'

    );

    /**

    *

    * The regular expression used to find source text matching this

    * rule.

    *

    * @access public

    *

    * @var string

    *

    */

    var $regex = '/(\[\[image\s+)(.+?)(\]\])/i';

    /**

     * The regular expressions used to check ecternal urls

     *

     * @access public

     * @var string

     * @see parse()

     */

    var $url = '';

    /**

     * Constructor.

     * We override the constructor to build up the url regex from config

     *

     * @param object &$obj the base conversion handler

     * @return The parser object

     * @access public

     */

    function Text_Wiki_Parse_Image(&$obj)

    {

        $default = $this->conf;

        parent::Text_Wiki_Parse($obj);

        // convert the list of recognized schemes to a regex OR,

        $schemes = $this->getConf('schemes', $default['schemes']);

        $this->url = str_replace( '#delim#', $this->wiki->delim,

           '#(?:' . (is_array($schemes) ? implode('|', $schemes) : $schemes) . ')://'

           . $this->getConf('host_regexp', $default['host_regexp'])

           . $this->getConf('path_regexp', $default['path_regexp']) .'#');

    }

    /**

    *

    * Generates a token entry for the matched text.  Token options are:

    *

    * 'src' => The image source, typically a relative path name.

    *

    * 'opts' => Any macro options following the source.

    *

    * @access public

    *

    * @param array &$matches The array of matches from parse().

    *

    * @return A delimited token number to be used as a placeholder in

    * the source text.

    *

    */

    function process(&$matches)

    {

        $pos = strpos($matches[2], ' ');

        if ($pos === false) {

            $options = array(

                'src' => $matches[2],

                'attr' => array());

        } else {

            // everything after the space is attribute arguments

            $options = array(

                'src' => substr($matches[2], 0, $pos),

                'attr' => $this->getAttrs(substr($matches[2], $pos+1))

            );

            // check the scheme case of external link

            if (array_key_exists('link', $options['attr'])) {

                // external url ?

                if (($pos = strpos($options['attr']['link'], '://')) !== false) {

                    if (!preg_match($this->url, $options['attr']['link'])) {

                        return $matches[0];

                    }

                } elseif (in_array('Wikilink', $this->wiki->disable)) {

                        return $matches[0]; // Wikilink disabled

                }

            }

        }

        return $this->wiki->addToken($this->rule, $options);

    }

}

?>