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| 1 | <?php |
| 2 | /** |
| 3 | * Adapter for turning a DifferenceEngine into a SlotDiffRenderer. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup DifferenceEngine |
| 22 | */ |
| 23 | use MediaWiki\MediaWikiServices; |
| 24 | use MediaWiki\Output\OutputPage; |
| 25 | |
| 26 | /** |
| 27 | * B/C adapter for turning a DifferenceEngine into a SlotDiffRenderer. |
| 28 | * Before SlotDiffRenderer was introduced, getDiff() functionality was provided by DifferenceEngine |
| 29 | * subclasses. Convert such a subclass into a SlotDiffRenderer. |
| 30 | * @deprecated |
| 31 | * @ingroup DifferenceEngine |
| 32 | */ |
| 33 | class DifferenceEngineSlotDiffRenderer extends SlotDiffRenderer { |
| 34 | |
| 35 | /** @var DifferenceEngine */ |
| 36 | private $differenceEngine; |
| 37 | |
| 38 | /** |
| 39 | * @param DifferenceEngine $differenceEngine |
| 40 | */ |
| 41 | public function __construct( DifferenceEngine $differenceEngine ) { |
| 42 | $this->differenceEngine = clone $differenceEngine; |
| 43 | |
| 44 | // Set state to loaded. This should not matter to any of the methods invoked by |
| 45 | // the adapter, but just in case a load does get triggered somehow, make sure it's a no-op. |
| 46 | $fakeContent = MediaWikiServices::getInstance() |
| 47 | ->getContentHandlerFactory() |
| 48 | ->getContentHandler( CONTENT_MODEL_WIKITEXT ) |
| 49 | ->makeEmptyContent(); |
| 50 | $this->differenceEngine->setContent( $fakeContent, $fakeContent ); |
| 51 | |
| 52 | $this->differenceEngine->markAsSlotDiffRenderer(); |
| 53 | } |
| 54 | |
| 55 | /** @inheritDoc */ |
| 56 | public function getDiff( Content $oldContent = null, Content $newContent = null ) { |
| 57 | $this->normalizeContents( $oldContent, $newContent ); |
| 58 | return $this->differenceEngine->generateContentDiffBody( $oldContent, $newContent ); |
| 59 | } |
| 60 | |
| 61 | /** @inheritDoc */ |
| 62 | public function addModules( OutputPage $output ) { |
| 63 | $oldContext = null; |
| 64 | if ( $output !== $this->differenceEngine->getOutput() ) { |
| 65 | $oldContext = $this->differenceEngine->getContext(); |
| 66 | $newContext = new DerivativeContext( $oldContext ); |
| 67 | $newContext->setOutput( $output ); |
| 68 | $this->differenceEngine->setContext( $newContext ); |
| 69 | } |
| 70 | $this->differenceEngine->showDiffStyle(); |
| 71 | if ( $oldContext ) { |
| 72 | $this->differenceEngine->setContext( $oldContext ); |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | /** @inheritDoc */ |
| 77 | public function getExtraCacheKeys() { |
| 78 | return $this->differenceEngine->getExtraCacheKeys(); |
| 79 | } |
| 80 | |
| 81 | } |