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SpecialComparePages.php
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SpecialComparePages.php
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<?php
/**
* Copyright © 2010 Derk-Jan Hartman <hartman@videolan.org>
*
* @license GPL-2.0-or-later
* @file
*/
namespace MediaWiki\Specials;
use DifferenceEngine;
use MediaWiki\Content\IContentHandlerFactory;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Revision\RevisionLookup;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Revision\SlotRecord;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Title\Title;
/**
* Implements Special:ComparePages
*
* @ingroup SpecialPage
*/
class SpecialComparePages extends SpecialPage {
private RevisionLookup $revisionLookup;
private IContentHandlerFactory $contentHandlerFactory;
/** @var DifferenceEngine */
private $differenceEngine;
public function __construct(
RevisionLookup $revisionLookup,
IContentHandlerFactory $contentHandlerFactory
) {
parent::__construct( 'ComparePages' );
$this->revisionLookup = $revisionLookup;
$this->contentHandlerFactory = $contentHandlerFactory;
}
/**
* Show a form for filtering namespace and username
*
* @param string|null $par
*/
public function execute( $par ) {
$this->setHeaders();
$this->outputHeader();
$this->getOutput()->addModuleStyles( 'mediawiki.special' );
$this->addHelpLink( 'Help:Diff' );
$form = HTMLForm::factory( 'ooui', [
'Page1' => [
'type' => 'title',
'exists' => true,
'name' => 'page1',
'label-message' => 'compare-page1',
'size' => '40',
'section' => 'page1',
'required' => false,
],
'Revision1' => [
'type' => 'int',
'name' => 'rev1',
'label-message' => 'compare-rev1',
'size' => '8',
'section' => 'page1',
'validation-callback' => $this->checkExistingRevision( ... ),
],
'Page2' => [
'type' => 'title',
'name' => 'page2',
'exists' => true,
'label-message' => 'compare-page2',
'size' => '40',
'section' => 'page2',
'required' => false,
],
'Revision2' => [
'type' => 'int',
'name' => 'rev2',
'label-message' => 'compare-rev2',
'size' => '8',
'section' => 'page2',
'validation-callback' => $this->checkExistingRevision( ... ),
],
'Action' => [
'type' => 'hidden',
'name' => 'action',
],
'Unhide' => [
'type' => 'hidden',
'name' => 'unhide',
],
], $this->getContext(), 'compare' );
$form->setMethod( 'get' )
->setSubmitTextMsg( 'compare-submit' )
->setSubmitCallback( $this->showDiff( ... ) )
->show();
if ( $this->differenceEngine ) {
$this->differenceEngine->showDiffPage( true );
}
}
/**
* @param array $data
* @param HTMLForm $form
*/
private function showDiff( $data, HTMLForm $form ) {
$rev1 = $this->revOrTitle( $data['Revision1'], $data['Page1'] );
$rev2 = $this->revOrTitle( $data['Revision2'], $data['Page2'] );
if ( $rev1 && $rev2 ) {
// Revision IDs either passed the existence check or were fetched from existing titles.
$revisionRecord = $this->revisionLookup->getRevisionById( $rev1 );
$contentModel = $revisionRecord->getSlot(
SlotRecord::MAIN,
RevisionRecord::RAW
)->getModel();
$contentHandler = $this->contentHandlerFactory->getContentHandler( $contentModel );
$this->differenceEngine = $contentHandler->createDifferenceEngine( $form->getContext(),
$rev1,
$rev2,
0, // rcid
( $data['Action'] == 'purge' ),
( $data['Unhide'] == '1' )
);
}
}
private function revOrTitle( ?string $revision, ?string $title ): ?int {
if ( $revision ) {
return (int)$revision;
} elseif ( $title ) {
return Title::newFromText( $title )->getLatestRevID();
}
return null;
}
/**
* @param string|null $value
* @param array $alldata
* @return string|bool
*/
private function checkExistingRevision( $value, $alldata ) {
if ( $value === '' || $value === null ) {
return true;
}
$revisionRecord = $this->revisionLookup->getRevisionById( (int)$value );
if ( $revisionRecord === null ) {
return $this->msg( 'compare-revision-not-exists' )->parseAsBlock();
}
return true;
}
/** @inheritDoc */
protected function getGroupName() {
return 'pagetools';
}
}
/** @deprecated class alias since 1.41 */
class_alias( SpecialComparePages::class, 'SpecialComparePages' );

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text/x-php
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Oct 4 2026, 17:58 (5 w, 4 d ago)
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Default Alt Text
SpecialComparePages.php (4 KB)

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