1	<?php
2
3	namespace MediaWiki\Diff\Hook;
4
5	use DifferenceEngine;
6
7	/**
8	* This is a hook handler interface, see docs/Hooks.md.
9	* Use the hook name "DifferenceEngineShowDiffPageMaybeShowMissingRevision" to register
10	* handlers implementing this interface.
11	*
12	* @stable to implement
13	* @ingroup Hooks
14	*/
15	interface DifferenceEngineShowDiffPageMaybeShowMissingRevisionHook {
16	/**
17	* This hook is called in DifferenceEngine::showDiffPage() when revision
18	* data cannot be loaded.
19	*
20	* @since 1.35
21	*
22	* @param DifferenceEngine $differenceEngine
23	* @return bool|void True or no return value to continue, or false to
24	*   prevent displaying the missing revision message (i.e. to prevent
25	*   DifferenceEngine::showMissingRevision() from being called)
26	*/
27	public function onDifferenceEngineShowDiffPageMaybeShowMissingRevision(
28	$differenceEngine
29	);
30	}