/** * * Parse for block-quoted text. * * Find source text marked as a blockquote, identified by any number of * greater-than signs '>' at the start of the line, followed by a space, * and then the quote text; each '>' indicates an additional level of * quoting. * * $Id: Blockquote.php,v 1.1 2005/01/31 15:46:52 pmjones Exp $ * * @author Paul M. Jones * * @package Text_Wiki * */ class Text_Wiki_Parse_Blockquote extends Text_Wiki_Parse { /** * * Regex for parsing the source text. * * @access public * * @var string * * @see parse() * */ var $regex = '/\n((\>).*\n)(?!(\>))/Us'; /** * * Generates a replacement for the matched text. * * Token options are: * * 'type' => * 'start' : the start of a blockquote * 'end' : the end of a blockquote * * 'level' => the indent level (0 for the first level, 1 for the * second, etc) * * @access public * * @param array &$matches The array of matches from parse(). * * @return A series of text and delimited tokens marking the different * list text and list elements. * */ function process(&$matches) { // the replacement text we will return to parse() $return = ''; // the list of post-processing matches $list = array(); // $matches[1] is the text matched as a list set by parse(); // create an array called $list that contains a new set of // matches for the various list-item elements. preg_match_all( '=^(\>+) (.*\n)=Ums', $matches[1], $list, PREG_SET_ORDER ); // a stack of starts and ends; we keep this so that we know what // indent level we're at. $stack = array(); // loop through each list-item element. foreach ($list as $key => $val) { // $val[0] is the full matched list-item line // $val[1] is the number of initial '>' chars (indent level) // $val[2] is the quote text // we number levels starting at 1, not zero $level = strlen($val[1]); // get the text of the line $text = $val[2]; // add a level to the list? while ($level > count($stack)) { // the current indent level is greater than the number // of stack elements, so we must be starting a new // level. push the new level onto the stack with a // dummy value (boolean true)... array_push($stack, true); $return .= "\n"; // ...and add a start token to the return. $return .= $this->wiki->addToken( $this->rule, array( 'type' => 'start', 'level' => $level - 1 ) ); $return .= "\n\n"; } // remove a level? while (count($stack) > $level) { // as long as the stack count is greater than the // current indent level, we need to end list types. // continue adding end-list tokens until the stack count // and the indent level are the same. array_pop($stack); $return .= "\n\n"; $return .= $this->wiki->addToken( $this->rule, array ( 'type' => 'end', 'level' => count($stack) ) ); $return .= "\n"; } // add the line text. $return .= $text; } // the last line may have been indented. go through the stack // and create end-tokens until the stack is empty. $return .= "\n"; while (count($stack) > 0) { array_pop($stack); $return .= $this->wiki->addToken( $this->rule, array ( 'type' => 'end', 'level' => count($stack) ) ); } // we're done! send back the replacement text. return "\n$return\n\n"; } } ?>
