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<?php
/**
*
* Parses for paragraph blocks.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
* @license LGPL
*
* @version $Id: Paragraph.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $
*
*/
/**
*
* Parses for paragraph blocks.
*
* This class implements a Text_Wiki rule to find sections of the source
* text that are paragraphs. A para is any line not starting with a token
* delimiter, followed by two newlines.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
*/
class Text_Wiki_Parse_Paragraph extends Text_Wiki_Parse {
/**
*
* The regular expression used to find source text matching this
* rule.
*
* @access public
*
* @var string
*
*/
var $regex = "/^.*?\n\n/m";
var $conf = array(
'skip' => array(
'blockquote', // are we sure about this one?
'code',
'heading',
'horiz',
'deflist',
'table',
'list',
'toc'
)
);
/**
*
* Generates a token entry for the matched text. Token options are:
*
* 'start' => The starting point of the paragraph.
*
* 'end' => The ending point of the paragraph.
*
* @access public
*
* @param array &$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)
{
$delim = $this->wiki->delim;
// was anything there?
if (trim($matches[0]) == '') {
return '';
}
// does the match start with a delimiter?
if (substr($matches[0], 0, 1) != $delim) {
// no.
$start = $this->wiki->addToken(
$this->rule, array('type' => 'start')
);
$end = $this->wiki->addToken(
$this->rule, array('type' => 'end')
);
return $start . trim($matches[0]) . $end;
}
// the line starts with a delimiter. read in the delimited
// token number, check the token, and see if we should
// skip it.
// loop starting at the second character (we already know
// the first is a delimiter) until we find another
// delimiter; the text between them is a token key number.
$key = '';
$len = strlen($matches[0]);
for ($i = 1; $i < $len; $i++) {
$char = $matches[0]{$i};
if ($char == $delim) {
break;
} else {
$key .= $char;
}
}
// look at the token and see if it's skippable (if we skip,
// it will not be marked as a paragraph)
$token_type = strtolower($this->wiki->tokens[$key][0]);
$skip = $this->getConf('skip', array());
if (in_array($token_type, $skip)) {
// this type of token should not have paragraphs applied to it.
// return the entire matched text.
return $matches[0];
} else {
$start = $this->wiki->addToken(
$this->rule, array('type' => 'start')
);
$end = $this->wiki->addToken(
$this->rule, array('type' => 'end')
);
return $start . trim($matches[0]) . $end;
}
}
}
?>
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