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<?php
namespace MediaWiki\Extension\Scribunto;
use MediaWiki\Content\CodeContentHandler;
use MediaWiki\Content\Content;
use MediaWiki\Content\Renderer\ContentParseParams;
use MediaWiki\Content\TextContent;
use MediaWiki\Content\ValidationParams;
use MediaWiki\Html\Html;
use MediaWiki\MediaWikiServices;
use MediaWiki\Page\PageIdentity;
use MediaWiki\Parser\ParserOutput;
use MediaWiki\Registration\ExtensionRegistry;
use MediaWiki\Status\Status;
use MediaWiki\SyntaxHighlight\SyntaxHighlight;
use MediaWiki\Title\Title;
/**
* Scribunto Content Handler
*
* @file
* @ingroup Extensions
* @ingroup Scribunto
*
* @author Brad Jorsch <bjorsch@wikimedia.org>
*/
class ScribuntoContentHandler extends CodeContentHandler {
/**
* @param string $modelId
* @param string[] $formats
*/
public function __construct(
$modelId = CONTENT_MODEL_SCRIBUNTO, $formats = [ CONTENT_FORMAT_TEXT ]
) {
parent::__construct( $modelId, $formats );
}
/** @inheritDoc */
protected function getContentClass() {
return ScribuntoContent::class;
}
/**
* @param string $format
* @return bool
*/
public function isSupportedFormat( $format ) {
// An error in an earlier version of Scribunto means we might see this.
if ( $format === 'CONTENT_FORMAT_TEXT' ) {
$format = CONTENT_FORMAT_TEXT;
}
return parent::isSupportedFormat( $format );
}
/**
* Only allow this content handler to be used in the Module namespace
* @param Title $title
* @return bool
*/
public function canBeUsedOn( Title $title ) {
if ( $title->getNamespace() !== NS_MODULE ) {
return false;
}
return parent::canBeUsedOn( $title );
}
/** @inheritDoc */
public function supportsPreloadContent(): bool {
return true;
}
/**
* @inheritDoc
*/
public function validateSave(
Content $content,
ValidationParams $validationParams
) {
'@phan-var ScribuntoContent $content';
return $this->validate( $content, $validationParams->getPageIdentity() );
}
/**
* Checks whether the script is valid
*
* @param TextContent $content
* @param PageIdentity $page
* @return Status
*/
public function validate( TextContent $content, PageIdentity $page ) {
if ( !( $page instanceof Title ) ) {
$titleFactory = MediaWikiServices::getInstance()->getTitleFactory();
$page = $titleFactory->newFromPageIdentity( $page );
}
$engine = Scribunto::newDefaultEngine();
$engine->setTitle( $page );
return $engine->validate( $content->getText(), $page->getPrefixedDBkey() );
}
/**
* @inheritDoc
*/
protected function fillParserOutput(
Content $content,
ContentParseParams $cpoParams,
ParserOutput &$parserOutput
) {
'@phan-var ScribuntoContent $content';
$page = $cpoParams->getPage();
$title = Title::newFromPageReference( $page );
$parserOptions = $cpoParams->getParserOptions();
$revId = $cpoParams->getRevId();
$generateHtml = $cpoParams->getGenerateHtml();
$parser = MediaWikiServices::getInstance()->getParserFactory()->getInstance();
$sourceCode = $content->getText();
$docTitle = Scribunto::getDocPage( $title );
$docMsg = $docTitle ? wfMessage(
$docTitle->exists() ? 'scribunto-doc-page-show' : 'scribunto-doc-page-does-not-exist',
$docTitle->getPrefixedText()
)->inContentLanguage() : null;
// Accumulate the following output:
// - docs (if any)
// - validation error (if any)
// - highlighted source code
$html = '';
if ( $docMsg && !$docMsg->isDisabled() ) {
// In order to allow the doc page to categorize the Module page,
// we need access to the ParserOutput of the doc page.
// This is why we can't simply use $docMsg->parse().
//
// We also can't use use ParserOutput::getText and ParserOutput::collectMetadata
// to merge the result into $parserOutput, because doing so would remove the
// ability for Skin/OutputPage to (post-cache) decide on the ParserOutput::getText
// parameters edit section links, TOC, and user language etc.
//
// So instead, this uses the doc page's ParserOutput as the actual ParserOutput
// we return, and add the other stuff to it. This is the only way to leave
// skin-decisions undecided and in-tact.
if ( $parserOptions->getTargetLanguage() === null ) {
$parserOptions->setTargetLanguage( $docTitle->getPageLanguage() );
}
$parserOutput = $parser->parse( $docMsg->plain(), $page, $parserOptions, true, true, $revId );
// Code is displayed and syntax highlighted as LTR, but the
// documentation can be RTL on RTL-language wikis.
//
// As long as we leave the $parserOutput in-tact, it will preserve the appropiate
// lang, dir, and class attributes (mw-content-ltr or mw-content-rtl) as needed
// for correct styling and accessiblity of the documentation page content.
// These will be applied when OutputPage eventually calls ParserOutput::getText()
$html .= $parserOutput->getRawText();
} else {
$parserOutput = new ParserOutput();
$parserOutput->setLanguage( $parserOptions->getTargetLanguage() ?? $docTitle->getPageLanguage() );
}
if ( $docTitle ) {
// Mark the doc page as transcluded, so that edits to the doc page will
// purge this Module page.
$parserOutput->addTemplate( $docTitle, $docTitle->getArticleID(), $docTitle->getLatestRevID() );
}
// Validate the script, and include an error message and tracking
// category if it's invalid
$status = $this->validate( $content, $title );
if ( !$status->isOK() ) {
// FIXME: This uses a Status object, which in turn uses global RequestContext
// to localize the message. This would poison the ParserCache.
//
// But, this code is almost unreachable in practice because there has
// been no way to create a Module page with invalid content since 2014
// (we validate and abort on edit, undelete, content-model change etc.).
// See also T304381.
$html .= Html::rawElement( 'div', [ 'class' => 'errorbox' ],
$status->getHTML( 'scribunto-error-short', 'scribunto-error-long' )
);
$trackingCategories = MediaWikiServices::getInstance()->getTrackingCategories();
$trackingCategories->addTrackingCategory( $parserOutput, 'scribunto-module-with-errors-category', $page );
}
if ( !$generateHtml ) {
// The doc page and validation error produce metadata and must happen
// unconditionally. The next step (syntax highlight) can be skipped if
// we don't actually need the HTML.
$parserOutput->setRawText( '' );
return;
}
$engine = Scribunto::newDefaultEngine();
$engine->setTitle( $title );
$codeLang = $engine->getGeSHiLanguage();
$html .= $this->highlight( $sourceCode, $parserOutput, $codeLang );
$parserOutput->setRawText( $html );
}
/**
* Get syntax highlighted code and add metadata to output.
*
* If SyntaxHighlight is not possible, falls back to a `<pre>` element.
*
* @param string $source Source code
* @param ParserOutput $parserOutput
* @param string|false $codeLang
* @return string HTML
*/
private function highlight( $source, ParserOutput $parserOutput, $codeLang ) {
$useGeSHi = MediaWikiServices::getInstance()->getMainConfig()->get( 'ScribuntoUseGeSHi' );
if (
$useGeSHi && $codeLang && ExtensionRegistry::getInstance()->isLoaded( 'SyntaxHighlight' )
) {
/** @var SyntaxHighlight $syntaxHighlight */
$syntaxHighlight = MediaWikiServices::getInstance()->getService( 'SyntaxHighlight.SyntaxHighlight' );
$status = $syntaxHighlight->syntaxHighlight( $source, $codeLang, [ 'line' => true, 'linelinks' => 'L' ] );
if ( $status->isGood() ) {
// @todo replace addModuleStyles line with the appropriate call on
// SyntaxHighlight once one is created
$parserOutput->addModuleStyles( [ 'ext.pygments' ] );
$parserOutput->addModules( [ 'ext.pygments.view' ] );
return $status->getValue();
}
}
return Html::element( 'pre', [
// Same as CodeContentHandler
'lang' => 'en',
'dir' => 'ltr',
'class' => 'mw-code mw-script'
], "\n$source\n" );
}
/**
* Create a redirect version of the content
*
* @param Title $target
* @param string $text
* @return ScribuntoContent
*/
public function makeRedirectContent( Title $target, $text = '' ) {
return Scribunto::newDefaultEngine()->makeRedirectContent( $target, $text );
}
/**
* @return bool
*/
public function supportsRedirects() {
return Scribunto::newDefaultEngine()->supportsRedirects();
}
}