wikimedia/mediawiki-core

<?php

namespace MediaWiki\Content\Hook;

use DifferenceEngine;
use MediaWiki\Context\IContextSource;

/**
 * This is a hook handler interface, see docs/Hooks.md.
 * Use the hook name "GetDifferenceEngine" to register handlers implementing this interface.
 *
 * @stable to implement
 * @ingroup Hooks
 */
interface GetDifferenceEngineHook {
    /**
     * This hook is called when getting a new difference engine interface object.
     * Use this hook to decorate or replace the default difference engine.
     *
     * @since 1.35
     *
     * @param IContextSource $context IContextSource context to be used for diff
     * @param int $old Revision ID to show and diff with
     * @param int|string $new Either a revision ID or one of the strings 'cur', 'prev' or 'next'
     * @param bool $refreshCache If set, refreshes the diff cache
     * @param bool $unhide If set, allow viewing deleted revs
     * @param DifferenceEngine &$differenceEngine Difference engine object to be used for the diff
     * @return bool|void True or no return value to continue or false to abort
     */
    public function onGetDifferenceEngine( $context, $old, $new, $refreshCache,
        $unhide, &$differenceEngine
    );
}