/**
* This method will be called before an article is displayed or previewed.
* For display and preview we strip out the semantic properties and append them
* at the end of the article.
*
* @param Parser $parser
* @param string $text
*/
static public function onInternalParseBeforeLinks( &$parser, &$text ) {
global $smwgStoreAnnotations, $smwgLinksInValues;
SMWParseData::stripMagicWords( $text, $parser );
// Store the results if enabled (we have to parse them in any case,
// in order to clean the wiki source for further processing).
$smwgStoreAnnotations = smwfIsSemanticsProcessed( $parser->getTitle()->getNamespace() );
SMWParserExtensions::$mTempStoreAnnotations = true; // used for [[SMW::on]] and [[SMW:off]]
// Process redirects, if any (it seems that there is indeed no more direct way of getting this info from MW)
if ( $smwgStoreAnnotations ) {
$rt = Title::newFromRedirect( $text );
if ( !is_null( $rt ) ) {
$p = new SMWDIProperty( '_REDI' );
$di = SMWDIWikiPage::newFromTitle( $rt, '__red' );
SMWParseData::getSMWData( $parser )->addPropertyObjectValue( $p, $di );
}
}
// only used in subsequent callbacks, forgotten afterwards
SMWParserExtensions::$mTempParser = $parser;
// In the regexp matches below, leading ':' escapes the markup, as known for Categories.
// Parse links to extract semantic properties.
if ( $smwgLinksInValues ) { // More complex regexp -- lib PCRE may cause segfaults if text is long :-(
$semanticLinkPattern = '/\[\[ # Beginning of the link
(?:([^:][^]]*):[=:])+ # Property name (or a list of those)
( # After that:
(?:[^|\[\]] # either normal text (without |, [ or ])
|\[\[[^]]*\]\] # or a [[link]]
|\[[^]]*\] # or an [external link]
)*) # all this zero or more times
(?:\|([^]]*))? # Display text (like "text" in [[link|text]]), optional
\]\] # End of link
/xu';
$text = preg_replace_callback( $semanticLinkPattern, array( 'SMWParserExtensions', 'parsePropertiesCallback' ), $text );
} else { // Simpler regexps -- no segfaults found for those, but no links in values.
$semanticLinkPattern = '/\[\[ # Beginning of the link
(?:([^:][^]]*):[=:])+ # Property name (or a list of those)
([^\[\]]*) # content: anything but [, |, ]
\]\] # End of link
/xu';
$text = preg_replace_callback( $semanticLinkPattern, array( 'SMWParserExtensions', 'simpleParsePropertiesCallback' ), $text );
}
// Add link to RDF to HTML header.
// TODO: do escaping via Html or Xml class.
SMWOutputs::requireHeadItem(
'smw_rdf', '<link rel="alternate" type="application/rdf+xml" title="' .
htmlspecialchars( $parser->getTitle()->getPrefixedText() ) . '" href="' .
htmlspecialchars(
SpecialPage::getTitleFor( 'ExportRDF', $parser->getTitle()->getPrefixedText() )->getLocalUrl( 'xmlmime=rdf' )
) . "\" />"
);
SMWOutputs::commitToParser( $parser );
return true; // always return true, in order not to stop MW's hook processing!
}
