70325b3952
The {{description2}} parser function is still present. The <metadesc>
hooks was just added "so that Description2 can be used as a
replacement for Extension:MetaDescriptionTag", but MW 1.35 deprecated
and 1.36 removed support for Parser::setFunctionTagHook.
Bug: T236809
Change-Id: I53710f0d0a7bc8de4a3404b6df9ccbd1381cf36d
111 lines
2.9 KiB
PHP
111 lines
2.9 KiB
PHP
<?php
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namespace MediaWiki\Extension\Description2;
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use MediaWiki\MediaWikiServices;
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use OutputPage;
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use Parser;
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use ParserOutput;
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use PPFrame;
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/**
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* Description2 – Adds meaningful description <meta> tag to MW pages and into the parser output
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*
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* @file
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* @ingroup Extensions
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* @author Daniel Friesen (http://danf.ca/mw/)
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* @copyright Copyright 2010 – Daniel Friesen
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* @license GPL-2.0-or-later
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* @link https://www.mediawiki.org/wiki/Extension:Description2 Documentation
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*/
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class Description2 {
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/**
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* @param Parser $parser The parser.
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* @param string $desc The description text.
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*/
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public static function setDescription( Parser $parser, $desc ) {
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$parserOutput = $parser->getOutput();
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if ( $parserOutput->getProperty( 'description' ) !== false ) {
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return;
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}
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$parserOutput->setProperty( 'description', $desc );
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}
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/**
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* @link https://www.mediawiki.org/wiki/Manual:Hooks/ParserAfterTidy
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* @param Parser &$parser The parser.
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* @param string &$text The page text.
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* @return bool
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*/
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public static function onParserAfterTidy( Parser &$parser, &$text ) {
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$desc = '';
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$pattern = '%<table\b[^>]*+>(?:(?R)|[^<]*+(?:(?!</?table\b)<[^<]*+)*+)*+</table>%i';
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$myText = preg_replace( $pattern, '', $text );
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$paragraphs = [];
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if ( preg_match_all( '#<p>.*?</p>#is', $myText, $paragraphs ) ) {
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foreach ( $paragraphs[0] as $paragraph ) {
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$paragraph = trim( strip_tags( $paragraph ) );
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if ( !$paragraph ) {
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continue;
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}
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$desc = $paragraph;
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break;
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}
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}
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if ( $desc ) {
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self::setDescription( $parser, $desc );
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}
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return true;
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}
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/**
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* @param Parser &$parser The parser.
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* @return bool
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*/
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public static function onParserFirstCallInit( Parser &$parser ) {
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$config = MediaWikiServices::getInstance()
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->getConfigFactory()
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->makeConfig( 'Description2' );
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if ( !$config->get( 'EnableMetaDescriptionFunctions' ) ) {
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// Functions and tags are disabled
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return true;
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}
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$parser->setFunctionHook(
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'description2',
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[ static::class, 'parserFunctionCallback' ],
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Parser::SFH_OBJECT_ARGS
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);
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return true;
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}
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/**
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* @param Parser $parser The parser.
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* @param PPFrame $frame The frame.
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* @param string[] $args The arguments of the parser function call.
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* @return string
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*/
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public static function parserFunctionCallback( Parser $parser, PPFrame $frame, $args ) {
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$desc = isset( $args[0] ) ? $frame->expand( $args[0] ) : '';
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self::setDescription( $parser, $desc );
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return '';
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}
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/**
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* @param OutputPage &$out The output page to add the meta element to.
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* @param ParserOutput $parserOutput The parser output to get the description from.
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*/
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public static function onOutputPageParserOutput( OutputPage &$out, ParserOutput $parserOutput ) {
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// Export the description from the main parser output into the OutputPage
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$description = $parserOutput->getProperty( 'description' );
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if ( $description !== false ) {
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$out->addMeta( 'description', $description );
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}
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}
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}
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