mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/SyntaxHighlight_GeSHi
synced 2024-11-15 18:49:22 +00:00
ee3896a51c
Requires https://gerrit.wikimedia.org/r/#/c/225035/ Change-Id: If46b56fa8aa26b03890274ac772110eba9519f8d
494 lines
15 KiB
PHP
494 lines
15 KiB
PHP
<?php
|
|
/**
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
* http://www.gnu.org/copyleft/gpl.html
|
|
*/
|
|
|
|
use KzykHys\Pygments\Pygments;
|
|
|
|
// @codingStandardsIgnoreStart
|
|
class SyntaxHighlight_GeSHi {
|
|
// @codingStandardsIgnoreEnd
|
|
|
|
/** @var const The maximum number of lines that may be selected for highlighting. **/
|
|
const HIGHLIGHT_MAX_LINES = 1000;
|
|
|
|
/** @var const Maximum input size for the highlighter (100 kB). **/
|
|
const HIGHLIGHT_MAX_BYTES = 102400;
|
|
|
|
/** @var const CSS class for syntax-highlighted code. **/
|
|
const HIGHLIGHT_CSS_CLASS = 'mw-highlight';
|
|
|
|
/** @var const Cache version. Increment whenever the HTML changes. */
|
|
const CACHE_VERSION = 1;
|
|
|
|
/** @var array Mapping of MIME-types to lexer names. **/
|
|
private static $mimeLexers = array(
|
|
'text/javascript' => 'javascript',
|
|
'application/json' => 'javascript',
|
|
'text/xml' => 'xml',
|
|
);
|
|
|
|
public static function onSetup() {
|
|
global $wgPygmentizePath;
|
|
|
|
// If $wgPygmentizePath is unset, use the bundled copy.
|
|
if ( $wgPygmentizePath === false ) {
|
|
$wgPygmentizePath = __DIR__ . '/pygments/pygmentize';
|
|
}
|
|
|
|
if ( file_exists( __DIR__ . '/vendor/autoload.php' ) ) {
|
|
require_once __DIR__ . '/vendor/autoload.php';
|
|
}
|
|
}
|
|
/**
|
|
* Get the Pygments lexer name for a particular language.
|
|
*
|
|
* @param string $lang Language name.
|
|
* @return string|null Lexer name, or null if no matching lexer.
|
|
*/
|
|
private static function getLexer( $lang ) {
|
|
static $lexers = null;
|
|
|
|
if ( $lang === null ) {
|
|
return null;
|
|
}
|
|
|
|
if ( !$lexers ) {
|
|
$lexers = require __DIR__ . '/SyntaxHighlight_GeSHi.lexers.php';
|
|
}
|
|
|
|
$lexer = strtolower( $lang );
|
|
|
|
if ( in_array( $lexer, $lexers ) ) {
|
|
return $lexer;
|
|
}
|
|
|
|
// Check if this is a GeSHi lexer name for which there exists
|
|
// a compatible Pygments lexer with a different name.
|
|
if ( isset( GeSHi::$compatibleLexers[$lexer] ) ) {
|
|
$lexer = GeSHi::$compatibleLexers[$lexer];
|
|
if ( in_array( $lexer, $lexers ) ) {
|
|
return $lexer;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Register parser hook
|
|
*
|
|
* @param $parser Parser
|
|
* @return bool
|
|
*/
|
|
public static function onParserFirstCallInit( Parser &$parser ) {
|
|
foreach ( array( 'source', 'syntaxhighlight' ) as $tag ) {
|
|
$parser->setHook( $tag, array( 'SyntaxHighlight_GeSHi', 'parserHook' ) );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parser hook
|
|
*
|
|
* @param string $text
|
|
* @param array $args
|
|
* @param Parser $parser
|
|
* @return string
|
|
*/
|
|
public static function parserHook( $text, $args = array(), $parser ) {
|
|
global $wgUseTidy;
|
|
|
|
// Don't trim leading spaces away, just the linefeeds
|
|
$out = preg_replace( '/^\n+/', '', rtrim( $text ) );
|
|
|
|
// Convert deprecated attributes
|
|
if ( isset( $args['enclose'] ) ) {
|
|
if ( $args['enclose'] === 'none' ) {
|
|
$args['inline'] = true;
|
|
}
|
|
unset( $args['enclose'] );
|
|
}
|
|
|
|
$lexer = isset( $args['lang'] ) ? $args['lang'] : '';
|
|
|
|
$result = self::highlight( $out, $lexer, $args );
|
|
if ( !$result->isGood() ) {
|
|
$parser->addTrackingCategory( 'syntaxhighlight-error-category' );
|
|
}
|
|
$out = $result->getValue();
|
|
|
|
// HTML Tidy will convert tabs to spaces incorrectly (bug 30930).
|
|
// But the conversion from tab to space occurs while reading the input,
|
|
// before the conversion from 	 to tab, so we can armor it that way.
|
|
if ( $wgUseTidy ) {
|
|
$out = str_replace( "\t", '	', $out );
|
|
}
|
|
|
|
// Allow certain HTML attributes
|
|
$htmlAttribs = Sanitizer::validateAttributes( $args, array( 'style', 'class', 'id', 'dir' ) );
|
|
if ( !isset( $htmlAttribs['class'] ) ) {
|
|
$htmlAttribs['class'] = self::HIGHLIGHT_CSS_CLASS;
|
|
} else {
|
|
$htmlAttribs['class'] .= ' ' . self::HIGHLIGHT_CSS_CLASS;
|
|
}
|
|
if ( !( isset( $htmlAttribs['dir'] ) && $htmlAttribs['dir'] === 'rtl' ) ) {
|
|
$htmlAttribs['dir'] = 'ltr';
|
|
}
|
|
|
|
if ( isset( $args['inline'] ) ) {
|
|
// Enforce inlineness. Stray newlines may result in unexpected list and paragraph processing
|
|
// (also known as doBlockLevels()).
|
|
$out = str_replace( "\n", ' ', $out );
|
|
$out = Html::rawElement( 'code', $htmlAttribs, $out );
|
|
|
|
} else {
|
|
// Not entirely sure what benefit this provides, but it was here already
|
|
$htmlAttribs['class'] .= ' ' . 'mw-content-' . $htmlAttribs['dir'];
|
|
|
|
// Unwrap Pygments output to provide our own wrapper. We can't just always use the 'nowrap'
|
|
// option (pass 'inline'), since it disables other useful things like line highlighting.
|
|
// Tolerate absence of quotes for Html::element() and wgWellFormedXml=false.
|
|
$m = array();
|
|
if ( preg_match( '/^<div class="?mw-highlight"?>(.*)<\/div>$/s', trim( $out ), $m ) ) {
|
|
$out = trim( $m[1] );
|
|
} else {
|
|
throw new MWException( 'Unexpected output from Pygments encountered' );
|
|
}
|
|
|
|
// Use 'nowiki' strip marker to prevent list processing (also known as doBlockLevels()).
|
|
// However, leave the wrapping <div/> outside to prevent <p/>-wrapping.
|
|
$marker = $parser->mUniqPrefix . '-syntaxhighlightinner-' .
|
|
sprintf( '%08X', $parser->mMarkerIndex++ ) . $parser::MARKER_SUFFIX;
|
|
$parser->mStripState->addNoWiki( $marker, $out );
|
|
|
|
$out = Html::openElement( 'div', $htmlAttribs ) .
|
|
$marker .
|
|
Html::closeElement( 'div' );
|
|
}
|
|
|
|
// Register CSS
|
|
$parser->getOutput()->addModuleStyles( 'ext.pygments' );
|
|
|
|
return $out;
|
|
}
|
|
|
|
/**
|
|
* Highlight a code-block using a particular lexer.
|
|
*
|
|
* @param string $code Code to highlight.
|
|
* @param string|null $lang Language name, or null to use plain markup.
|
|
* @param array $args Associative array of additional arguments.
|
|
* If it contains a 'line' key, the output will include line numbers.
|
|
* If it includes a 'highlight' key, the value will be parsed as a
|
|
* comma-separated list of lines and line-ranges to highlight.
|
|
* If it contains a 'start' key, the value will be used as the line at which to
|
|
* start highlighting.
|
|
* If it contains a 'inline' key, the output will not be wrapped in `<div><pre/></div>`.
|
|
* @return Status Status object, with HTML representing the highlighted
|
|
* code as its value.
|
|
*/
|
|
protected static function highlight( $code, $lang = null, $args = array() ) {
|
|
global $wgPygmentizePath;
|
|
|
|
$status = new Status;
|
|
|
|
$lexer = self::getLexer( $lang );
|
|
if ( $lexer === null && $lang !== null ) {
|
|
$status->warning( 'syntaxhighlight-error-unknown-language', $lang );
|
|
}
|
|
|
|
$length = strlen( $code );
|
|
if ( strlen( $code ) > self::HIGHLIGHT_MAX_BYTES ) {
|
|
$status->warning( 'syntaxhighlight-error-exceeds-size-limit',
|
|
$length, self::HIGHLIGHT_MAX_BYTES );
|
|
$lexer = null;
|
|
}
|
|
|
|
if ( wfShellExecDisabled() !== false ) {
|
|
$status->warning( 'syntaxhighlight-error-pygments-invocation-failure' );
|
|
wfWarn(
|
|
'MediaWiki determined that it cannot invoke Pygments. ' .
|
|
'As a result, SyntaxHighlight_GeSHi will not perform any syntax highlighting. ' .
|
|
'See the debug log for details: ' .
|
|
'https://www.mediawiki.org/wiki/Manual:$wgDebugLogFile'
|
|
);
|
|
$lexer = null;
|
|
}
|
|
|
|
$inline = isset( $args['inline'] );
|
|
|
|
if ( $lexer === null ) {
|
|
if ( $inline ) {
|
|
$status->value = htmlspecialchars( trim( $code ), ENT_NOQUOTES );
|
|
} else {
|
|
$pre = Html::element( 'pre', array(), $code );
|
|
$status->value = Html::rawElement( 'div', array( 'class' => self::HIGHLIGHT_CSS_CLASS ), $pre );
|
|
}
|
|
return $status;
|
|
}
|
|
|
|
$options = array(
|
|
'cssclass' => self::HIGHLIGHT_CSS_CLASS,
|
|
'encoding' => 'utf-8',
|
|
);
|
|
|
|
// Line numbers
|
|
if ( isset( $args['line'] ) ) {
|
|
$options['linenos'] = 'inline';
|
|
}
|
|
|
|
if ( $lexer === 'php' && strpos( $code, '<?php' ) === false ) {
|
|
$options['startinline'] = 1;
|
|
}
|
|
|
|
// Highlight specific lines
|
|
if ( isset( $args['highlight'] ) ) {
|
|
$lines = self::parseHighlightLines( $args['highlight'] );
|
|
if ( count( $lines ) ) {
|
|
$options['hl_lines'] = implode( ' ', $lines );
|
|
}
|
|
}
|
|
|
|
// Starting line number
|
|
if ( isset( $args['start'] ) ) {
|
|
$options['linenostart'] = $args['start'];
|
|
}
|
|
|
|
if ( $inline ) {
|
|
$options['nowrap'] = 1;
|
|
}
|
|
|
|
$cache = wfGetMainCache();
|
|
$cacheKey = self::makeCacheKey( $code, $lexer, $options );
|
|
$output = $cache->get( $cacheKey );
|
|
|
|
if ( $output === false ) {
|
|
try {
|
|
$pygments = new Pygments( $wgPygmentizePath );
|
|
$output = $pygments->highlight( $code, $lexer, 'html', $options );
|
|
} catch ( RuntimeException $e ) {
|
|
$status->warning( 'syntaxhighlight-error-pygments-invocation-failure' );
|
|
wfWarn(
|
|
'Failed to invoke Pygments. Please check that Pygments is installed ' .
|
|
'and that $wgPygmentizePath is accurate.'
|
|
);
|
|
$status->value = self::highlight( $code, null, $args )->getValue();
|
|
return $status;
|
|
}
|
|
$cache->set( $cacheKey, $output );
|
|
}
|
|
|
|
if ( $inline ) {
|
|
$output = trim( $output );
|
|
}
|
|
|
|
$status->value = $output;
|
|
return $status;
|
|
|
|
}
|
|
|
|
/**
|
|
* Construct a cache key for the results of a Pygments invocation.
|
|
*
|
|
* @param string $code Code to be highlighted.
|
|
* @param string $lexer Lexer name.
|
|
* @param array $options Options array.
|
|
* @return string Cache key.
|
|
*/
|
|
private static function makeCacheKey( $code, $lexer, $options ) {
|
|
$optionString = FormatJson::encode( $options, false, FormatJson::ALL_OK );
|
|
$hash = md5( "{$code}|{$lexer}|{$optionString}|" . self::CACHE_VERSION );
|
|
if ( function_exists( 'wfGlobalCacheKey' ) ) {
|
|
return wfGlobalCacheKey( 'highlight', $hash );
|
|
} else {
|
|
return 'highlight:' . $hash;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Take an input specifying a list of lines to highlight, returning
|
|
* a raw list of matching line numbers.
|
|
*
|
|
* Input is comma-separated list of lines or line ranges.
|
|
*
|
|
* @param string $lineSpec
|
|
* @return int[] Line numbers.
|
|
*/
|
|
protected static function parseHighlightLines( $lineSpec ) {
|
|
$lines = array();
|
|
$values = array_map( 'trim', explode( ',', $lineSpec ) );
|
|
foreach ( $values as $value ) {
|
|
if ( ctype_digit( $value ) ) {
|
|
$lines[] = (int)$value;
|
|
} elseif ( strpos( $value, '-' ) !== false ) {
|
|
list( $start, $end ) = array_map( 'trim', explode( '-', $value ) );
|
|
if ( self::validHighlightRange( $start, $end ) ) {
|
|
for ( $i = intval( $start ); $i <= $end; $i++ ) {
|
|
$lines[] = $i;
|
|
}
|
|
}
|
|
}
|
|
if ( count( $lines ) > self::HIGHLIGHT_MAX_LINES ) {
|
|
$lines = array_slice( $lines, 0, self::HIGHLIGHT_MAX_LINES );
|
|
break;
|
|
}
|
|
}
|
|
return $lines;
|
|
}
|
|
|
|
/**
|
|
* Validate a provided input range
|
|
* @param $start
|
|
* @param $end
|
|
* @return bool
|
|
*/
|
|
protected static function validHighlightRange( $start, $end ) {
|
|
// Since we're taking this tiny range and producing a an
|
|
// array of every integer between them, it would be trivial
|
|
// to DoS the system by asking for a huge range.
|
|
// Impose an arbitrary limit on the number of lines in a
|
|
// given range to reduce the impact.
|
|
return
|
|
ctype_digit( $start ) &&
|
|
ctype_digit( $end ) &&
|
|
$start > 0 &&
|
|
$start < $end &&
|
|
$end - $start < self::HIGHLIGHT_MAX_LINES;
|
|
}
|
|
|
|
/**
|
|
* Hook into Content::getParserOutput to provide syntax highlighting for
|
|
* script content.
|
|
*
|
|
* @return bool
|
|
* @since MW 1.21
|
|
*/
|
|
public static function onContentGetParserOutput( Content $content, Title $title,
|
|
$revId, ParserOptions $options, $generateHtml, ParserOutput &$output ) {
|
|
|
|
global $wgParser, $wgTextModelsToParse;
|
|
|
|
if ( !$generateHtml ) {
|
|
// Nothing special for us to do, let MediaWiki handle this.
|
|
return true;
|
|
}
|
|
|
|
// Determine the language
|
|
$extension = ExtensionRegistry::getInstance();
|
|
$models = $extension->getAttribute( 'SyntaxHighlightModels' );
|
|
$model = $content->getModel();
|
|
if ( !isset( $models[$model] ) ) {
|
|
// We don't care about this model, carry on.
|
|
return true;
|
|
}
|
|
$lexer = $models[$model];
|
|
|
|
// Hope that $wgSyntaxHighlightModels does not contain silly types.
|
|
$text = ContentHandler::getContentText( $content );
|
|
if ( !$text ) {
|
|
// Oops! Non-text content? Let MediaWiki handle this.
|
|
return true;
|
|
}
|
|
|
|
// Parse using the standard parser to get links etc. into the database, HTML is replaced below.
|
|
// We could do this using $content->fillParserOutput(), but alas it is 'protected'.
|
|
if ( $content instanceof TextContent && in_array( $model, $wgTextModelsToParse ) ) {
|
|
$output = $wgParser->parse( $text, $title, $options, true, true, $revId );
|
|
}
|
|
|
|
$status = self::highlight( $text, $lexer );
|
|
if ( !$status->isOK() ) {
|
|
return true;
|
|
}
|
|
$out = $status->getValue();
|
|
|
|
$output->addModuleStyles( 'ext.pygments' );
|
|
$output->setText( '<div dir="ltr">' . $out . '</div>' );
|
|
|
|
// Inform MediaWiki that we have parsed this page and it shouldn't mess with it.
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Hook to provide syntax highlighting for API pretty-printed output
|
|
*
|
|
* @param IContextSource $context
|
|
* @param string $text
|
|
* @param string $mime
|
|
* @param string $format
|
|
* @since MW 1.24
|
|
*/
|
|
public static function onApiFormatHighlight( IContextSource $context, $text, $mime, $format ) {
|
|
if ( !isset( self::$mimeLexers[$mime] ) ) {
|
|
return true;
|
|
}
|
|
|
|
$lexer = self::$mimeLexers[$mime];
|
|
$status = self::highlight( $text, $lexer );
|
|
if ( !$status->isOK() ) {
|
|
return true;
|
|
}
|
|
|
|
$out = $status->getValue();
|
|
if ( preg_match( '/^<pre([^>]*)>/i', $out, $m ) ) {
|
|
$attrs = Sanitizer::decodeTagAttributes( $m[1] );
|
|
$attrs['class'] .= ' api-pretty-content';
|
|
$encodedAttrs = Sanitizer::safeEncodeTagAttributes( $attrs );
|
|
$out = '<pre' . $encodedAttrs. '>' . substr( $out, strlen( $m[0] ) );
|
|
}
|
|
$output = $context->getOutput();
|
|
$output->addModuleStyles( 'ext.pygments' );
|
|
$output->addHTML( '<div dir="ltr">' . $out . '</div>' );
|
|
|
|
// Inform MediaWiki that we have parsed this page and it shouldn't mess with it.
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Reject parser cache values that are for GeSHi since those
|
|
* ResourceLoader modules no longer exist
|
|
*
|
|
* @param ParserOutput $parserOutput
|
|
* @param WikiPage|Article $page
|
|
* @param ParserOptions $popts
|
|
* @return bool
|
|
*/
|
|
public static function onRejectParserCacheValue(
|
|
ParserOutput $parserOutput, $page, ParserOptions $popts
|
|
) {
|
|
foreach ( $parserOutput->getModuleStyles() as $module ) {
|
|
if ( strpos( $module, 'ext.geshi.' ) === 0 ) {
|
|
$page->getTitle()->purgeSquid();
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/** Backward-compatibility shim for extensions. */
|
|
public static function prepare( $text, $lang ) {
|
|
wfDeprecated( __METHOD__ );
|
|
return new GeSHi( self::highlight( $text, $lang )->getValue() );
|
|
}
|
|
|
|
/** Backward-compatibility shim for extensions. */
|
|
public static function buildHeadItem( $geshi ) {
|
|
wfDeprecated( __METHOD__ );
|
|
$geshi->parse_code();
|
|
return '';
|
|
}
|
|
}
|