mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Math
synced 2024-11-15 03:34:10 +00:00
119 lines
3.2 KiB
PHP
119 lines
3.2 KiB
PHP
<?php
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/**
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* MediaWiki math extension
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*
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* (c) 2002-2015 Tomasz Wegrzanowski, Brion Vibber, Moritz Schubotz,
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* and other MediaWiki contributors
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* GPLv2 license; info in main package.
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*
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* @author Moritz Schubotz
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*/
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use MediaWiki\Logger\LoggerFactory;
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class MathInputCheckTexvc extends MathInputCheck {
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/**
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* Converts an error returned by texvc to a localized exception
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*
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* @param string $texvcResult error result returned by texvc
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* @param bool|MathRenderer $errorRenderer
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* @return string
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*/
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public function convertTexvcError( $texvcResult, $errorRenderer = false ) {
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$texvcStatus = substr( $texvcResult, 0, 1 );
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$errDetails = htmlspecialchars( substr( $texvcResult, 1 ) );
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if ( $errorRenderer === false ) {
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$errorRenderer = new MathSource( $this->inputTeX );
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}
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switch ( $texvcStatus ) {
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case 'E':
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$errMsg = $errorRenderer->getError( 'math_lexing_error' );
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break;
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case 'S':
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$errMsg = $errorRenderer->getError( 'math_syntax_error' );
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break;
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case 'F':
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$errMsg = $errorRenderer->getError( 'math_unknown_function', $errDetails );
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break;
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default:
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$errMsg = $errorRenderer->getError( 'math_unknown_error' );
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}
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return $errMsg;
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}
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/**
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* @return bool
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*/
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public function isValid() {
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$us = $this;
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$checkWork = new PoolCounterWorkViaCallback( 'MathTexvc-check', "", [
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'doWork' => function () use ( $us ) {
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return $us->doValidCheck();
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}
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] );
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return $checkWork->execute();
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}
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/**
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* @return bool
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*/
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public function doValidCheck() {
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global $wgMathTexvcCheckExecutable;
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if ( $wgMathTexvcCheckExecutable === false ) {
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$texvcCheckExecutable = __DIR__ . '/texvccheck/texvccheck';
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} else {
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$texvcCheckExecutable = $wgMathTexvcCheckExecutable;
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}
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if ( !is_executable( $texvcCheckExecutable ) ) {
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$msg = 'Missing "texvccheck" executable. Please see math/README to configure.';
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trigger_error( $msg, E_USER_NOTICE );
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LoggerFactory::getInstance( 'Math' )->error( $msg );
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return true;
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}
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$cmd = $texvcCheckExecutable . ' ' . wfEscapeShellArg( $this->inputTeX );
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if ( wfIsWindows() ) {
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# Invoke it within cygwin sh, because texvc expects sh features in its default shell
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$cmd = 'sh -c ' . wfEscapeShellArg( $cmd );
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}
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LoggerFactory::getInstance( 'Math' )->debug( "TeX check command: $cmd" );
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if ( strlen( $cmd ) > SHELL_MAX_ARG_STRLEN ) {
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LoggerFactory::getInstance( 'Math' )->error(
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"User input exceeded SHELL_MAX_ARG_STRLEN." );
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return $this->convertTexvcError( '' );
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}
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$contents = wfShellExec( $cmd );
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LoggerFactory::getInstance( 'Math' )->debug( "TeX check result: $contents\n---" );
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if ( strlen( $contents ) === 0 ) {
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LoggerFactory::getInstance( 'Math' )->warning( 'TeX check output was empty.' );
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$this->lastError = $this->convertTexvcError( $contents );
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return false;
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}
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$retval = substr( $contents, 0, 1 );
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if ( $retval !== '+' ) {
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$this->lastError = $this->convertTexvcError( $contents );
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LoggerFactory::getInstance( 'Math' )->warning( 'checkTex failed: ' . $this->lastError );
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return false;
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} else {
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$this->validTeX = substr( $contents, 1 );
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$this->isValid = true;
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LoggerFactory::getInstance( 'Math' )->debug(
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'checkTex successful tex is now: ' . $this->validTeX );
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return true;
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}
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}
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}
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