103 lines
2.6 KiB
PHP
103 lines
2.6 KiB
PHP
<?php
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/**
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* MediaWiki math extension
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*
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* (c) 2002-2013 Tomasz Wegrzanowski, Brion Vibber, Moritz Schubotz, 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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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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*/
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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 $errMsg;
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}
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/**
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* @return boolean
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*/
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public function isValid() {
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$us = $this;
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$checkWork = new PoolCounterWorkViaCallback( 'MathTexvc-check', "", array(
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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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* @global type $wgTexvc
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* @return boolean
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*/
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public function doValidCheck() {
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global $wgMathTexvcCheckExecutable;
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if ( !is_executable( $wgMathTexvcCheckExecutable ) ) {
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$msg = wfMessage( 'math_notexvc' )->inContentLanguage()->escaped();
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trigger_error( $msg, E_USER_NOTICE );
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wfDebugLog( 'Math', $msg );
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return true;
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}
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$cmd = $wgMathTexvcCheckExecutable . ' ' . 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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wfDebugLog( 'Math', "TeX check command: $cmd\n" );
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$contents = wfShellExec( $cmd );
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wfDebugLog( 'Math', "TeX check result:\n $contents\n---\n" );
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if ( strlen($contents) === 0 ) {
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wfDebugLog( 'Math', "TeX check output was empty. \n" );
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$this->lastError = MathRenderer::getError( 'math_unknown_error' );
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return false;
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}
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$retval = substr( $contents, 0, 1 );
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if ( $retval !== '+' ) {
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$this->lastError = $this->convertTexvcError( $contents );
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wfDebugLog( 'Math', '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->isSecure = true;
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wfDebugLog( 'Math', '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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