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<?php
/**
*
* Parse for links to wiki pages.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
* @license LGPL
*
* @version $Id: Wikilink.php,v 1.5 2005/09/14 14:29:38 toggg Exp $
*
*/
/**
*
* Parse for links to wiki pages.
*
* Wiki page names are typically in StudlyCapsStyle made of
* WordsSmashedTogether.
*
* You can also create described links to pages in this style:
* [WikiPageName nice text link to use for display]
*
* The token options for this rule are:
*
* 'page' => the wiki page name.
*
* 'text' => the displayed link text.
*
* 'anchor' => a named anchor on the target wiki page.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
*/
class Text_Wiki_Parse_Wikilink extends Text_Wiki_Parse {
var $conf = array (
'ext_chars' => false
);
/**
*
* Constructor.
*
* We override the Text_Wiki_Parse constructor so we can
* explicitly comment each part of the $regex property.
*
* @access public
*
* @param object &$obj The calling "parent" Text_Wiki object.
*
*/
function Text_Wiki_Parse_Wikilink(&$obj)
{
parent::Text_Wiki_Parse($obj);
if ($this->getConf('ext_chars')) {
// use an extended character set; this should
// allow for umlauts and so on. taken from the
// Tavi project defaults.php file.
$upper = "A-Z\xc0-\xde";
$lower = "a-z0-9\xdf-\xfe";
$either = "A-Za-z0-9\xc0-\xfe";
} else {
// the default character set, should be fine
// for most purposes.
$upper = "A-Z";
$lower = "a-z0-9";
$either = "A-Za-z0-9";
}
// build the regular expression for finding WikiPage names.
$this->regex =
"(!?" . // START WikiPage pattern (1)
"[$upper]" . // 1 upper
"[$either]*" . // 0+ alpha or digit
"[$lower]+" . // 1+ lower or digit
"[$upper]" . // 1 upper
"[$either]*" . // 0+ or more alpha or digit
")" . // END WikiPage pattern (/1)
"((\#" . // START Anchor pattern (2)(3)
"[$either]" . // 1 alpha
"(" . // start sub pattern (4)
"[-_$either:.]*" . // 0+ dash, alpha, digit, underscore, colon, dot
"[-_$either]" . // 1 dash, alpha, digit, or underscore
")?)?)"; // end subpatterns (/4)(/3)(/2)
}
/**
*
* First parses for described links, then for standalone links.
*
* @access public
*
* @return void
*
*/
function parse()
{
// described wiki links
$tmp_regex = '/\[' . $this->regex . ' (.+?)\]/';
$this->wiki->source = preg_replace_callback(
$tmp_regex,
array(&$this, 'processDescr'),
$this->wiki->source
);
// standalone wiki links
if ($this->getConf('ext_chars')) {
$either = "A-Za-z0-9\xc0-\xfe";
} else {
$either = "A-Za-z0-9";
}
$tmp_regex = "/(^|[^{$either}\-_]){$this->regex}/";
$this->wiki->source = preg_replace_callback(
$tmp_regex,
array(&$this, 'process'),
$this->wiki->source
);
}
/**
*
* Generate a replacement for described links.
*
* @access public
*
* @param array &$matches The array of matches from parse().
*
* @return A delimited token to be used as a placeholder in
* the source text, plus any text priot to the match.
*
*/
function processDescr(&$matches)
{
// set the options
$options = array(
'page' => $matches[1],
'text' => $matches[5],
'anchor' => $matches[3]
);
// create and return the replacement token and preceding text
return $this->wiki->addToken($this->rule, $options); // . $matches[7];
}
/**
*
* Generate a replacement for standalone links.
*
*
* @access public
*
* @param array &$matches The array of matches from parse().
*
* @return A delimited token to be used as a placeholder in
* the source text, plus any text prior to the match.
*
*/
function process(&$matches)
{
// when prefixed with !, it's explicitly not a wiki link.
// return everything as it was.
if ($matches[2]{0} == '!') {
return $matches[1] . substr($matches[2], 1) . $matches[3];
}
// set the options
$options = array(
'page' => $matches[2],
'text' => $matches[2] . $matches[3],
'anchor' => $matches[3]
);
// create and return the replacement token and preceding text
return $matches[1] . $this->wiki->addToken($this->rule, $options);
}
}
?>
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