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<?php
/**
*
* Parse for block-quoted text.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
* @license LGPL
*
* @version $Id: Blockquote.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $
*
*/
/**
*
* 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.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
*/
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";
}
}
?>
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