includes/wikiengine/Parse/Mediawiki/Paragraph.php
author Dan
Sun, 02 Dec 2007 16:00:56 -0500
changeset 310 199b9708f4a2
parent 32 4d87aad3c4c0
permissions -rw-r--r--
Merging in a couple more revisions from stable
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<?php
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/**
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* 
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* Parses for paragraph blocks.
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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: Paragraph.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $
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* 
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*/
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/**
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* 
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* Parses for paragraph blocks.
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* 
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* This class implements a Text_Wiki rule to find sections of the source
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* text that are paragraphs.  A para is any line not starting with a token
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* delimiter, followed by two newlines.
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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_Paragraph extends Text_Wiki_Parse {
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    /**
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    * 
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    * The regular expression used to find source text matching this
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    * rule.
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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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    */
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    var $regex = "/^.*?\n\n/m";
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    var $conf = array(
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        'skip' => array(
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            'blockquote', // are we sure about this one?
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            'code',
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            'heading',
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            'horiz',
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            'deflist',
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            'table',
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            'list',
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            'toc',
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            'pre'
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        )
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    );
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    /**
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    * 
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    * Generates a token entry for the matched text.  Token options are:
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    * 
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    * 'start' => The starting point of the paragraph.
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    * 
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    * 'end' => The ending point of the paragraph.
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    * 
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    * @access public
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    *
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    * @param array &$matches The array of matches from parse().
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    *
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    * @return A delimited token number to be used as a placeholder in
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    * the source text.
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    *
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    */
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    function process(&$matches)
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    {
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        $delim = $this->wiki->delim;
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        // was anything there?
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        if (trim($matches[0]) == '') {
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            return '';
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        }
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        // does the match start with a delimiter?
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        if (substr($matches[0], 0, 1) != $delim) { 
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            // no.
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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 $start . trim($matches[0]) . $end;
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        }
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        // the line starts with a delimiter.  read in the delimited
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        // token number, check the token, and see if we should
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        // skip it.
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        // loop starting at the second character (we already know
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        // the first is a delimiter) until we find another
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        // delimiter; the text between them is a token key number.
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        $key = '';
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        $len = strlen($matches[0]);
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        for ($i = 1; $i < $len; $i++) {
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            $char = $matches[0]{$i};
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            if ($char == $delim) {
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                break;
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            } else {
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                $key .= $char;
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            }
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        }
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        // look at the token and see if it's skippable (if we skip,
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        // it will not be marked as a paragraph)
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        $token_type = strtolower($this->wiki->tokens[$key][0]);
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        $skip = $this->getConf('skip', array());
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        if (in_array($token_type, $skip)) {
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            // this type of token should not have paragraphs applied to it.
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            // return the entire matched text.
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            return $matches[0];
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        } else {
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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 $start . trim($matches[0]) . $end;
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        }
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    }
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    /**
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    *
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    * Abstrct method to parse source text for matches.
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    *
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    * Applies the rule's regular expression to the source text, passes
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    * every match to the process() method, and replaces the matched text
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    * with the results of the processing.
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    *
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    * @access public
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    *
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    * @see Text_Wiki_Parse::process()
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    *
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    */
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    function parse()
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    {
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        $source =& $this->wiki->source;
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        $source = wikiformat_process_block($source);
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        $source = preg_replace('/<litewiki>(.*?)<\/litewiki>([\s]+?|$)/is', '<litewiki>\\1\\2</litewiki>', $source);
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        // die('<pre>' . htmlspecialchars($source) . '</pre>');
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        $this->wiki->source = preg_replace_callback(
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            $this->regex,
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            array(&$this, 'process'),
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            $this->wiki->source
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        );
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        $source = preg_replace('/<litewiki>(.*?)<\/litewiki>/is', '\\1', $source);
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    }
1
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}
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?>