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<?php
/**
* Adapter for turning a DifferenceEngine into a SlotDiffRenderer.
*
* 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
*
* @file
* @ingroup DifferenceEngine
*/
use MediaWiki\Content\Content;
use MediaWiki\Context\DerivativeContext;
use MediaWiki\MediaWikiServices;
use MediaWiki\Output\OutputPage;
/**
* B/C adapter for turning a DifferenceEngine into a SlotDiffRenderer.
* Before SlotDiffRenderer was introduced, getDiff() functionality was provided by DifferenceEngine
* subclasses. Convert such a subclass into a SlotDiffRenderer.
* @deprecated
* @ingroup DifferenceEngine
*/
class DifferenceEngineSlotDiffRenderer extends SlotDiffRenderer {
/** @var DifferenceEngine */
private $differenceEngine;
/**
* @param DifferenceEngine $differenceEngine
*/
public function __construct( DifferenceEngine $differenceEngine ) {
$this->differenceEngine = clone $differenceEngine;
// Set state to loaded. This should not matter to any of the methods invoked by
// the adapter, but just in case a load does get triggered somehow, make sure it's a no-op.
$fakeContent = MediaWikiServices::getInstance()
->getContentHandlerFactory()
->getContentHandler( CONTENT_MODEL_WIKITEXT )
->makeEmptyContent();
$this->differenceEngine->setContent( $fakeContent, $fakeContent );
$this->differenceEngine->markAsSlotDiffRenderer();
}
/** @inheritDoc */
public function getDiff( ?Content $oldContent = null, ?Content $newContent = null ) {
$this->normalizeContents( $oldContent, $newContent );
return $this->differenceEngine->generateContentDiffBody( $oldContent, $newContent );
}
/** @inheritDoc */
public function addModules( OutputPage $output ) {
$oldContext = null;
if ( $output !== $this->differenceEngine->getOutput() ) {
$oldContext = $this->differenceEngine->getContext();
$newContext = new DerivativeContext( $oldContext );
$newContext->setOutput( $output );
$this->differenceEngine->setContext( $newContext );
}
$this->differenceEngine->showDiffStyle();
if ( $oldContext ) {
$this->differenceEngine->setContext( $oldContext );
}
}
/** @inheritDoc */
public function getExtraCacheKeys() {
return $this->differenceEngine->getExtraCacheKeys();
}
}
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