mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Scribunto
synced 2024-12-25 14:23:16 +00:00
397 lines
12 KiB
PHP
397 lines
12 KiB
PHP
<?php
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/**
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* Wikitext scripting infrastructure for MediaWiki: hooks.
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* Copyright (C) 2009-2012 Victor Vasiliev <vasilvv@gmail.com>
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* http://www.mediawiki.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*/
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use MediaWiki\MediaWikiServices;
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use UtfNormal\Validator;
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use Wikimedia\PSquare;
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/**
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* Hooks for the Scribunto extension.
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*/
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class ScribuntoHooks {
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/**
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* Define content handler constant upon extension registration
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*/
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public static function onRegistration() {
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define( 'CONTENT_MODEL_SCRIBUNTO', 'Scribunto' );
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}
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/**
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* Get software information for Special:Version
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*
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* @param array &$software
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* @return bool
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*/
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public static function getSoftwareInfo( array &$software ) {
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$engine = Scribunto::newDefaultEngine();
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$engine->setTitle( Title::makeTitle( NS_SPECIAL, 'Version' ) );
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$engine->getSoftwareInfo( $software );
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return true;
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}
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/**
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* Register parser hooks.
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*
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* @param Parser &$parser
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* @return bool
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*/
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public static function setupParserHook( Parser &$parser ) {
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$parser->setFunctionHook( 'invoke', 'ScribuntoHooks::invokeHook', Parser::SFH_OBJECT_ARGS );
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return true;
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}
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/**
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* Called when the interpreter is to be reset.
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*
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* @param Parser &$parser
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* @return bool
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*/
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public static function clearState( Parser &$parser ) {
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Scribunto::resetParserEngine( $parser );
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return true;
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}
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/**
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* Called when the parser is cloned
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*
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* @param Parser $parser
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* @return bool
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*/
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public static function parserCloned( Parser $parser ) {
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$parser->scribunto_engine = null;
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return true;
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}
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/**
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* Hook function for {{#invoke:module|func}}
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*
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* @param Parser &$parser
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* @param PPFrame $frame
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* @param array $args
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* @throws MWException
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* @throws ScribuntoException
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* @return string
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*/
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public static function invokeHook( Parser &$parser, PPFrame $frame, array $args ) {
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global $wgScribuntoGatherFunctionStats;
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try {
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if ( count( $args ) < 2 ) {
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throw new ScribuntoException( 'scribunto-common-nofunction' );
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}
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$moduleName = trim( $frame->expand( $args[0] ) );
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$engine = Scribunto::getParserEngine( $parser );
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$title = Title::makeTitleSafe( NS_MODULE, $moduleName );
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if ( !$title || !$title->hasContentModel( CONTENT_MODEL_SCRIBUNTO ) ) {
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throw new ScribuntoException( 'scribunto-common-nosuchmodule',
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[ 'args' => [ $moduleName ] ] );
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}
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$module = $engine->fetchModuleFromParser( $title );
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if ( !$module ) {
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throw new ScribuntoException( 'scribunto-common-nosuchmodule',
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[ 'args' => [ $moduleName ] ] );
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}
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$functionName = trim( $frame->expand( $args[1] ) );
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$bits = $args[1]->splitArg();
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unset( $args[0] );
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unset( $args[1] );
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// If $bits['index'] is empty, then the function name was parsed as a
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// key=value pair (because of an equals sign in it), and since it didn't
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// have an index, we don't need the index offset.
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$childFrame = $frame->newChild( $args, $title, $bits['index'] === '' ? 0 : 1 );
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if ( $wgScribuntoGatherFunctionStats ) {
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$u0 = $engine->getResourceUsage( $engine::CPU_SECONDS );
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$result = $module->invoke( $functionName, $childFrame );
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$u1 = $engine->getResourceUsage( $engine::CPU_SECONDS );
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if ( $u1 > $u0 ) {
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$timingMs = (int)( 1000 * ( $u1 - $u0 ) );
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// Since the overhead of stats is worst when when #invoke
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// calls are very short, don't process measurements <= 20ms.
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if ( $timingMs > 20 ) {
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self::reportTiming( $moduleName, $functionName, $timingMs );
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}
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}
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} else {
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$result = $module->invoke( $functionName, $childFrame );
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}
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return Validator::cleanUp( strval( $result ) );
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} catch ( ScribuntoException $e ) {
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$trace = $e->getScriptTraceHtml( [ 'msgOptions' => [ 'content' ] ] );
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$html = Html::element( 'p', [], $e->getMessage() );
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if ( $trace !== false ) {
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$html .= Html::element( 'p',
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[],
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wfMessage( 'scribunto-common-backtrace' )->inContentLanguage()->text()
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) . $trace;
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} else {
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$html .= Html::element( 'p',
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[],
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wfMessage( 'scribunto-common-no-details' )->inContentLanguage()->text()
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);
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}
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$out = $parser->getOutput();
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$errors = $out->getExtensionData( 'ScribuntoErrors' );
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if ( $errors === null ) {
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// On first hook use, set up error array and output
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$errors = [];
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$parser->addTrackingCategory( 'scribunto-common-error-category' );
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$out->addModules( 'ext.scribunto.errors' );
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}
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$errors[] = $html;
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$out->setExtensionData( 'ScribuntoErrors', $errors );
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$out->addJsConfigVars( 'ScribuntoErrors', $errors );
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$id = 'mw-scribunto-error-' . ( count( $errors ) - 1 );
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$parserError = htmlspecialchars( $e->getMessage() );
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// #iferror-compatible error element
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return "<strong class=\"error\"><span class=\"scribunto-error\" id=\"$id\">" .
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$parserError. "</span></strong>";
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}
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}
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/**
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* Record stats on slow function calls.
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*
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* @param string $moduleName
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* @param string $functionName
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* @param int $timing Function execution time in milliseconds.
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*/
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public static function reportTiming( $moduleName, $functionName, $timing ) {
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global $wgScribuntoGatherFunctionStats, $wgScribuntoSlowFunctionThreshold;
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if ( !$wgScribuntoGatherFunctionStats ) {
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return;
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}
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$threshold = $wgScribuntoSlowFunctionThreshold;
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if ( !( is_float( $threshold ) && $threshold > 0 && $threshold < 1 ) ) {
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return;
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}
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static $cache;
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if ( !$cache ) {
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$cache = ObjectCache::getLocalServerInstance( CACHE_NONE );
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}
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// To control the sampling rate, we keep a compact histogram of
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// observations in APC, and extract the Nth percentile (specified
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// via $wgScribuntoSlowFunctionThreshold; defaults to 0.90).
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// We need APC and \Wikimedia\PSquare to do that.
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if ( !class_exists( PSquare::class ) || $cache instanceof EmptyBagOStuff ) {
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return;
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}
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$cacheVersion = '1';
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$key = $cache->makeGlobalKey( __METHOD__, $cacheVersion, $threshold );
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// This is a classic "read-update-write" critical section with no
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// mutual exclusion, but the only consequence is that some samples
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// will be dropped. We only need enough samples to estimate the
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// the shape of the data, so that's fine.
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$ps = $cache->get( $key ) ?: new PSquare( $threshold );
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$ps->addObservation( $timing );
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$cache->set( $key, $ps, 60 );
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if ( $ps->getCount() < 1000 || $timing < $ps->getValue() ) {
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return;
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}
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static $stats;
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if ( !$stats ) {
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$stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
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}
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$metricKey = sprintf( 'scribunto.traces.%s__%s__%s', wfWikiId(), $moduleName, $functionName );
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$stats->timing( $metricKey, $timing );
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}
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/**
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* @param Title $title
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* @param string &$languageCode
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* @return bool
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*/
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public static function getCodeLanguage( Title $title, &$languageCode ) {
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global $wgScribuntoUseCodeEditor;
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if ( $wgScribuntoUseCodeEditor && $title->hasContentModel( CONTENT_MODEL_SCRIBUNTO )
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) {
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$engine = Scribunto::newDefaultEngine();
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if ( $engine->getCodeEditorLanguage() ) {
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$languageCode = $engine->getCodeEditorLanguage();
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return false;
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}
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}
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return true;
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}
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/**
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* Set the Scribunto content handler for modules
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*
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* @param Title $title
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* @param string &$model
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* @return bool
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*/
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public static function contentHandlerDefaultModelFor( Title $title, &$model ) {
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if ( $title->getNamespace() == NS_MODULE && !Scribunto::isDocPage( $title ) ) {
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$model = CONTENT_MODEL_SCRIBUNTO;
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return false;
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}
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return true;
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}
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/**
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* Adds report of number of evaluations by the single wikitext page.
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*
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* @param Parser $parser
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* @param ParserOutput $output
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* @return bool
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*/
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public static function reportLimitData( Parser $parser, ParserOutput $output ) {
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if ( Scribunto::isParserEnginePresent( $parser ) ) {
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$engine = Scribunto::getParserEngine( $parser );
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$engine->reportLimitData( $output );
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}
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return true;
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}
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/**
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* Formats the limit report data
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*
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* @param string $key
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* @param mixed &$value
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* @param string &$report
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* @param bool $isHTML
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* @param bool $localize
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* @return bool
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*/
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public static function formatLimitData( $key, &$value, &$report, $isHTML, $localize ) {
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$engine = Scribunto::newDefaultEngine();
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return $engine->formatLimitData( $key, $value, $report, $isHTML, $localize );
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}
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/**
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* EditPage::showStandardInputs:options hook
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*
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* @param EditPage $editor
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* @param OutputPage $output
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* @param int &$tab Current tabindex
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* @return bool
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*/
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public static function showStandardInputsOptions( EditPage $editor, OutputPage $output, &$tab ) {
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if ( $editor->getTitle()->hasContentModel( CONTENT_MODEL_SCRIBUNTO ) ) {
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$output->addModules( 'ext.scribunto.edit' );
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$editor->editFormTextAfterTools .= '<div id="mw-scribunto-console"></div>';
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}
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return true;
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}
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/**
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* EditPage::showReadOnlyForm:initial hook
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*
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* @param EditPage $editor
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* @param OutputPage $output
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* @return bool
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*/
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public static function showReadOnlyFormInitial( EditPage $editor, OutputPage $output ) {
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if ( $editor->getTitle()->hasContentModel( CONTENT_MODEL_SCRIBUNTO ) ) {
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$output->addModules( 'ext.scribunto.edit' );
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$editor->editFormTextAfterContent .= '<div id="mw-scribunto-console"></div>';
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}
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return true;
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}
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/**
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* EditPageBeforeEditButtons hook
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*
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* @param EditPage &$editor
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* @param array &$buttons Button array
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* @param int &$tabindex Current tabindex
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* @return bool
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*/
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public static function beforeEditButtons( EditPage &$editor, array &$buttons, &$tabindex ) {
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if ( $editor->getTitle()->hasContentModel( CONTENT_MODEL_SCRIBUNTO ) ) {
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unset( $buttons['preview'] );
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}
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return true;
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}
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/**
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* @param IContextSource $context
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* @param Content $content
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* @param Status $status
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* @return bool
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*/
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public static function validateScript( IContextSource $context, Content $content,
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Status $status
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) {
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$title = $context->getTitle();
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if ( !$content instanceof ScribuntoContent ) {
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return true;
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}
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$validateStatus = $content->validate( $title );
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if ( $validateStatus->isOK() ) {
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return true;
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}
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$status->merge( $validateStatus );
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if ( isset( $validateStatus->scribunto_error->params['module'] ) ) {
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$module = $validateStatus->scribunto_error->params['module'];
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$line = $validateStatus->scribunto_error->params['line'];
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if ( $module === $title->getPrefixedDBkey() && preg_match( '/^\d+$/', $line ) ) {
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$out = $context->getOutput();
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$out->addInlineScript( 'window.location.hash = ' . Xml::encodeJsVar( "#mw-ce-l$line" ) );
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}
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}
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return true;
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}
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/**
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* @param Article &$article
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* @param bool &$outputDone
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* @param bool &$pcache
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* @return bool
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*/
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public static function showDocPageHeader( Article &$article, &$outputDone, &$pcache ) {
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$title = $article->getTitle();
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if ( Scribunto::isDocPage( $title, $forModule ) ) {
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$article->getContext()->getOutput()->addHTML(
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wfMessage( 'scribunto-doc-page-header', $forModule->getPrefixedText() )->parseAsBlock()
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);
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}
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return true;
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}
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}
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