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| 1 | <?php |
| 2 | /** |
| 3 | * Temporary action for MCR undos |
| 4 | * @file |
| 5 | * @ingroup Actions |
| 6 | */ |
| 7 | |
| 8 | use MediaWiki\CommentFormatter\CommentFormatter; |
| 9 | use MediaWiki\CommentStore\CommentStore; |
| 10 | use MediaWiki\CommentStore\CommentStoreComment; |
| 11 | use MediaWiki\Config\Config; |
| 12 | use MediaWiki\Context\IContextSource; |
| 13 | use MediaWiki\Html\Html; |
| 14 | use MediaWiki\Linker\Linker; |
| 15 | use MediaWiki\MainConfigNames; |
| 16 | use MediaWiki\Permissions\PermissionStatus; |
| 17 | use MediaWiki\Revision\MutableRevisionRecord; |
| 18 | use MediaWiki\Revision\RevisionLookup; |
| 19 | use MediaWiki\Revision\RevisionRecord; |
| 20 | use MediaWiki\Revision\RevisionRenderer; |
| 21 | use MediaWiki\Revision\SlotRecord; |
| 22 | use MediaWiki\SpecialPage\SpecialPage; |
| 23 | use MediaWiki\Status\Status; |
| 24 | use MediaWiki\Storage\EditResult; |
| 25 | use MediaWiki\User\User; |
| 26 | use Wikimedia\Rdbms\ReadOnlyMode; |
| 27 | |
| 28 | /** |
| 29 | * Temporary action for MCR undos |
| 30 | * |
| 31 | * This is intended to go away when real MCR support is added to EditPage and |
| 32 | * the standard undo-with-edit behavior can be implemented there instead. |
| 33 | * |
| 34 | * If this were going to be kept, we'd probably want to figure out a good way |
| 35 | * to reuse the same code for generating the headers, summary box, and buttons |
| 36 | * on EditPage and here, and to better share the diffing and preview logic |
| 37 | * between the two. But doing that now would require much of the rewriting of |
| 38 | * EditPage that we're trying to put off by doing this instead. |
| 39 | * |
| 40 | * @ingroup Actions |
| 41 | * @since 1.32 |
| 42 | */ |
| 43 | class McrUndoAction extends FormAction { |
| 44 | |
| 45 | protected int $undo = 0; |
| 46 | protected int $undoafter = 0; |
| 47 | protected int $cur = 0; |
| 48 | |
| 49 | /** @var RevisionRecord|null */ |
| 50 | protected $curRev = null; |
| 51 | |
| 52 | private ReadOnlyMode $readOnlyMode; |
| 53 | private RevisionLookup $revisionLookup; |
| 54 | private RevisionRenderer $revisionRenderer; |
| 55 | private CommentFormatter $commentFormatter; |
| 56 | private bool $useRCPatrol; |
| 57 | |
| 58 | /** |
| 59 | * @param Article $article |
| 60 | * @param IContextSource $context |
| 61 | * @param ReadOnlyMode $readOnlyMode |
| 62 | * @param RevisionLookup $revisionLookup |
| 63 | * @param RevisionRenderer $revisionRenderer |
| 64 | * @param CommentFormatter $commentFormatter |
| 65 | * @param Config $config |
| 66 | */ |
| 67 | public function __construct( |
| 68 | Article $article, |
| 69 | IContextSource $context, |
| 70 | ReadOnlyMode $readOnlyMode, |
| 71 | RevisionLookup $revisionLookup, |
| 72 | RevisionRenderer $revisionRenderer, |
| 73 | CommentFormatter $commentFormatter, |
| 74 | Config $config |
| 75 | ) { |
| 76 | parent::__construct( $article, $context ); |
| 77 | $this->readOnlyMode = $readOnlyMode; |
| 78 | $this->revisionLookup = $revisionLookup; |
| 79 | $this->revisionRenderer = $revisionRenderer; |
| 80 | $this->commentFormatter = $commentFormatter; |
| 81 | $this->useRCPatrol = $config->get( MainConfigNames::UseRCPatrol ); |
| 82 | } |
| 83 | |
| 84 | public function getName() { |
| 85 | return 'mcrundo'; |
| 86 | } |
| 87 | |
| 88 | public function getDescription() { |
| 89 | return ''; |
| 90 | } |
| 91 | |
| 92 | public function getRestriction() { |
| 93 | // Require 'edit' permission to even see this action (T297322) |
| 94 | return 'edit'; |
| 95 | } |
| 96 | |
| 97 | public function show() { |
| 98 | // Send a cookie so anons get talk message notifications |
| 99 | // (copied from SubmitAction) |
| 100 | MediaWiki\Session\SessionManager::getGlobalSession()->persist(); |
| 101 | |
| 102 | // Some stuff copied from EditAction |
| 103 | $this->useTransactionalTimeLimit(); |
| 104 | |
| 105 | $out = $this->getOutput(); |
| 106 | $out->setRobotPolicy( 'noindex,nofollow' ); |
| 107 | |
| 108 | // IP warning headers copied from EditPage |
| 109 | // (should more be copied?) |
| 110 | if ( $this->readOnlyMode->isReadOnly() ) { |
| 111 | $out->wrapWikiMsg( |
| 112 | "<div id=\"mw-read-only-warning\">\n$1\n</div>", |
| 113 | [ 'readonlywarning', $this->readOnlyMode->getReason() ] |
| 114 | ); |
| 115 | } elseif ( $this->context->getUser()->isAnon() ) { |
| 116 | // Note: EditPage has a special message for temp user creation intent here. |
| 117 | // But McrUndoAction doesn't support user creation. |
| 118 | if ( !$this->getRequest()->getCheck( 'wpPreview' ) ) { |
| 119 | $out->addHTML( |
| 120 | Html::warningBox( |
| 121 | $out->msg( |
| 122 | 'anoneditwarning', |
| 123 | // Log-in link |
| 124 | SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [ |
| 125 | 'returnto' => $this->getTitle()->getPrefixedDBkey() |
| 126 | ] ), |
| 127 | // Sign-up link |
| 128 | SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [ |
| 129 | 'returnto' => $this->getTitle()->getPrefixedDBkey() |
| 130 | ] ) |
| 131 | )->parse(), |
| 132 | 'mw-anon-edit-warning' |
| 133 | ) |
| 134 | ); |
| 135 | } else { |
| 136 | $out->addHTML( |
| 137 | Html::warningBox( |
| 138 | $out->msg( 'anonpreviewwarning' )->parse(), |
| 139 | 'mw-anon-preview-warning' |
| 140 | ) |
| 141 | ); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | parent::show(); |
| 146 | } |
| 147 | |
| 148 | protected function initFromParameters() { |
| 149 | $this->undoafter = $this->getRequest()->getInt( 'undoafter' ); |
| 150 | $this->undo = $this->getRequest()->getInt( 'undo' ); |
| 151 | |
| 152 | if ( $this->undo == 0 || $this->undoafter == 0 ) { |
| 153 | throw new ErrorPageError( 'mcrundofailed', 'mcrundo-missingparam' ); |
| 154 | } |
| 155 | |
| 156 | $curRev = $this->getWikiPage()->getRevisionRecord(); |
| 157 | if ( !$curRev ) { |
| 158 | throw new ErrorPageError( 'mcrundofailed', 'nopagetext' ); |
| 159 | } |
| 160 | $this->curRev = $curRev; |
| 161 | $this->cur = $this->getRequest()->getInt( 'cur', $this->curRev->getId() ); |
| 162 | } |
| 163 | |
| 164 | protected function checkCanExecute( User $user ) { |
| 165 | parent::checkCanExecute( $user ); |
| 166 | |
| 167 | $this->initFromParameters(); |
| 168 | |
| 169 | // We use getRevisionByTitle to verify the revisions belong to this page (T297322) |
| 170 | $title = $this->getTitle(); |
| 171 | $undoRev = $this->revisionLookup->getRevisionByTitle( $title, $this->undo ); |
| 172 | $oldRev = $this->revisionLookup->getRevisionByTitle( $title, $this->undoafter ); |
| 173 | |
| 174 | if ( $undoRev === null || $oldRev === null || |
| 175 | $undoRev->isDeleted( RevisionRecord::DELETED_TEXT ) || |
| 176 | $oldRev->isDeleted( RevisionRecord::DELETED_TEXT ) |
| 177 | ) { |
| 178 | throw new ErrorPageError( 'mcrundofailed', 'undo-norev' ); |
| 179 | } |
| 180 | |
| 181 | return true; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * @return MutableRevisionRecord |
| 186 | */ |
| 187 | private function getNewRevision() { |
| 188 | $undoRev = $this->revisionLookup->getRevisionById( $this->undo ); |
| 189 | $oldRev = $this->revisionLookup->getRevisionById( $this->undoafter ); |
| 190 | $curRev = $this->curRev; |
| 191 | |
| 192 | $isLatest = $curRev->getId() === $undoRev->getId(); |
| 193 | |
| 194 | if ( $undoRev === null || $oldRev === null || |
| 195 | $undoRev->isDeleted( RevisionRecord::DELETED_TEXT ) || |
| 196 | $oldRev->isDeleted( RevisionRecord::DELETED_TEXT ) |
| 197 | ) { |
| 198 | throw new ErrorPageError( 'mcrundofailed', 'undo-norev' ); |
| 199 | } |
| 200 | |
| 201 | if ( $isLatest ) { |
| 202 | // Short cut! Undoing the current revision means we just restore the old. |
| 203 | return MutableRevisionRecord::newFromParentRevision( $oldRev ); |
| 204 | } |
| 205 | |
| 206 | $newRev = MutableRevisionRecord::newFromParentRevision( $curRev ); |
| 207 | |
| 208 | // Figure out the roles that need merging by first collecting all roles |
| 209 | // and then removing the ones that don't. |
| 210 | $rolesToMerge = array_unique( array_merge( |
| 211 | $oldRev->getSlotRoles(), |
| 212 | $undoRev->getSlotRoles(), |
| 213 | $curRev->getSlotRoles() |
| 214 | ) ); |
| 215 | |
| 216 | // Any roles with the same content in $oldRev and $undoRev can be |
| 217 | // inherited because undo won't change them. |
| 218 | $rolesToMerge = array_intersect( |
| 219 | $rolesToMerge, $oldRev->getSlots()->getRolesWithDifferentContent( $undoRev->getSlots() ) |
| 220 | ); |
| 221 | if ( !$rolesToMerge ) { |
| 222 | throw new ErrorPageError( 'mcrundofailed', 'undo-nochange' ); |
| 223 | } |
| 224 | |
| 225 | // Any roles with the same content in $oldRev and $curRev were already reverted |
| 226 | // and so can be inherited. |
| 227 | $rolesToMerge = array_intersect( |
| 228 | $rolesToMerge, $oldRev->getSlots()->getRolesWithDifferentContent( $curRev->getSlots() ) |
| 229 | ); |
| 230 | if ( !$rolesToMerge ) { |
| 231 | throw new ErrorPageError( 'mcrundofailed', 'undo-nochange' ); |
| 232 | } |
| 233 | |
| 234 | // Any roles with the same content in $undoRev and $curRev weren't |
| 235 | // changed since and so can be reverted to $oldRev. |
| 236 | $diffRoles = array_intersect( |
| 237 | $rolesToMerge, $undoRev->getSlots()->getRolesWithDifferentContent( $curRev->getSlots() ) |
| 238 | ); |
| 239 | foreach ( array_diff( $rolesToMerge, $diffRoles ) as $role ) { |
| 240 | if ( $oldRev->hasSlot( $role ) ) { |
| 241 | $newRev->inheritSlot( $oldRev->getSlot( $role, RevisionRecord::RAW ) ); |
| 242 | } else { |
| 243 | $newRev->removeSlot( $role ); |
| 244 | } |
| 245 | } |
| 246 | $rolesToMerge = $diffRoles; |
| 247 | |
| 248 | // Any slot additions or removals not handled by the above checks can't be undone. |
| 249 | // There will be only one of the three revisions missing the slot: |
| 250 | // - !old means it was added in the undone revisions and modified after. |
| 251 | // Should it be removed entirely for the undo, or should the modified version be kept? |
| 252 | // - !undo means it was removed in the undone revisions and then readded with different content. |
| 253 | // Which content is should be kept, the old or the new? |
| 254 | // - !cur means it was changed in the undone revisions and then deleted after. |
| 255 | // Did someone delete vandalized content instead of undoing (meaning we should ideally restore |
| 256 | // it), or should it stay gone? |
| 257 | foreach ( $rolesToMerge as $role ) { |
| 258 | if ( !$oldRev->hasSlot( $role ) || !$undoRev->hasSlot( $role ) || !$curRev->hasSlot( $role ) ) { |
| 259 | throw new ErrorPageError( 'mcrundofailed', 'undo-failure' ); |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | // Try to merge anything that's left. |
| 264 | foreach ( $rolesToMerge as $role ) { |
| 265 | $oldContent = $oldRev->getSlot( $role, RevisionRecord::RAW )->getContent(); |
| 266 | $undoContent = $undoRev->getSlot( $role, RevisionRecord::RAW )->getContent(); |
| 267 | $curContent = $curRev->getSlot( $role, RevisionRecord::RAW )->getContent(); |
| 268 | $newContent = $undoContent->getContentHandler() |
| 269 | ->getUndoContent( $curContent, $undoContent, $oldContent, $isLatest ); |
| 270 | if ( !$newContent ) { |
| 271 | throw new ErrorPageError( 'mcrundofailed', 'undo-failure' ); |
| 272 | } |
| 273 | $newRev->setSlot( SlotRecord::newUnsaved( $role, $newContent ) ); |
| 274 | } |
| 275 | |
| 276 | return $newRev; |
| 277 | } |
| 278 | |
| 279 | private function generateDiffOrPreview() { |
| 280 | $newRev = $this->getNewRevision(); |
| 281 | if ( $newRev->hasSameContent( $this->curRev ) ) { |
| 282 | throw new ErrorPageError( 'mcrundofailed', 'undo-nochange' ); |
| 283 | } |
| 284 | |
| 285 | $diffEngine = new DifferenceEngine( $this->context ); |
| 286 | $diffEngine->setRevisions( $this->curRev, $newRev ); |
| 287 | |
| 288 | $oldtitle = $this->context->msg( 'currentrev' )->parse(); |
| 289 | $newtitle = $this->context->msg( 'yourtext' )->parse(); |
| 290 | |
| 291 | if ( $this->getRequest()->getCheck( 'wpPreview' ) ) { |
| 292 | $this->showPreview( $newRev ); |
| 293 | return ''; |
| 294 | } else { |
| 295 | $diffText = $diffEngine->getDiff( $oldtitle, $newtitle ); |
| 296 | $diffEngine->showDiffStyle(); |
| 297 | return '<div id="wikiDiff">' . $diffText . '</div>'; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | private function showPreview( RevisionRecord $rev ) { |
| 302 | // Mostly copied from EditPage::getPreviewText() |
| 303 | $out = $this->getOutput(); |
| 304 | |
| 305 | try { |
| 306 | # provide a anchor link to the form |
| 307 | $continueEditing = '<span class="mw-continue-editing">' . |
| 308 | '[[#mw-mcrundo-form|' . |
| 309 | $this->context->getLanguage()->getArrow() . ' ' . |
| 310 | $this->context->msg( 'continue-editing' )->text() . ']]</span>'; |
| 311 | |
| 312 | $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing; |
| 313 | |
| 314 | $parserOptions = $this->getWikiPage()->makeParserOptions( $this->context ); |
| 315 | $parserOptions->setRenderReason( 'page-preview' ); |
| 316 | $parserOptions->setIsPreview( true ); |
| 317 | $parserOptions->setIsSectionPreview( false ); |
| 318 | |
| 319 | $parserOutput = $this->revisionRenderer |
| 320 | ->getRenderedRevision( $rev, $parserOptions, $this->getAuthority() ) |
| 321 | ->getRevisionParserOutput(); |
| 322 | $previewHTML = $parserOutput->getText( [ |
| 323 | 'enableSectionEditLinks' => false, |
| 324 | 'includeDebugInfo' => true, |
| 325 | ] ); |
| 326 | |
| 327 | $out->addParserOutputMetadata( $parserOutput ); |
| 328 | if ( count( $parserOutput->getWarnings() ) ) { |
| 329 | $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() ); |
| 330 | } |
| 331 | } catch ( MWContentSerializationException $ex ) { |
| 332 | $m = $this->context->msg( |
| 333 | 'content-failed-to-parse', |
| 334 | $ex->getMessage() |
| 335 | ); |
| 336 | $note .= "\n\n" . $m->parse(); |
| 337 | $previewHTML = ''; |
| 338 | } |
| 339 | |
| 340 | $previewhead = Html::rawElement( |
| 341 | 'div', [ 'class' => 'previewnote' ], |
| 342 | Html::element( |
| 343 | 'h2', [ 'id' => 'mw-previewheader' ], |
| 344 | $this->context->msg( 'preview' )->text() |
| 345 | ) . |
| 346 | Html::warningBox( |
| 347 | $out->parseAsInterface( $note ) |
| 348 | ) |
| 349 | ); |
| 350 | |
| 351 | $out->addHTML( $previewhead . $previewHTML ); |
| 352 | } |
| 353 | |
| 354 | public function onSubmit( $data ) { |
| 355 | if ( !$this->getRequest()->getCheck( 'wpSave' ) ) { |
| 356 | // Diff or preview |
| 357 | return false; |
| 358 | } |
| 359 | |
| 360 | $updater = $this->getWikiPage()->newPageUpdater( $this->context->getUser() ); |
| 361 | $curRev = $updater->grabParentRevision(); |
| 362 | if ( !$curRev ) { |
| 363 | throw new ErrorPageError( 'mcrundofailed', 'nopagetext' ); |
| 364 | } |
| 365 | |
| 366 | if ( $this->cur !== $curRev->getId() ) { |
| 367 | return Status::newFatal( 'mcrundo-changed' ); |
| 368 | } |
| 369 | |
| 370 | $status = new PermissionStatus(); |
| 371 | $this->getAuthority()->authorizeWrite( 'edit', $this->getTitle(), $status ); |
| 372 | if ( !$status->isOK() ) { |
| 373 | throw new PermissionsError( 'edit', $status ); |
| 374 | } |
| 375 | |
| 376 | $newRev = $this->getNewRevision(); |
| 377 | if ( !$newRev->hasSameContent( $curRev ) ) { |
| 378 | $hookRunner = $this->getHookRunner(); |
| 379 | foreach ( $newRev->getSlotRoles() as $slotRole ) { |
| 380 | $slot = $newRev->getSlot( $slotRole, RevisionRecord::RAW ); |
| 381 | |
| 382 | $status = new Status(); |
| 383 | $hookResult = $hookRunner->onEditFilterMergedContent( |
| 384 | $this->getContext(), |
| 385 | $slot->getContent(), |
| 386 | $status, |
| 387 | trim( $this->getRequest()->getVal( 'wpSummary' ) ?? '' ), |
| 388 | $this->getUser(), |
| 389 | false |
| 390 | ); |
| 391 | |
| 392 | if ( !$hookResult ) { |
| 393 | if ( $status->isGood() ) { |
| 394 | $status->error( 'hookaborted' ); |
| 395 | } |
| 396 | |
| 397 | return $status; |
| 398 | } elseif ( !$status->isOK() ) { |
| 399 | if ( !$status->getErrors() ) { |
| 400 | $status->error( 'hookaborted' ); |
| 401 | } |
| 402 | return $status; |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | // Copy new slots into the PageUpdater, and remove any removed slots. |
| 407 | // TODO: This interface is awful, there should be a way to just pass $newRev. |
| 408 | // TODO: MCR: test this once we can store multiple slots |
| 409 | foreach ( $newRev->getSlots()->getSlots() as $slot ) { |
| 410 | $updater->setSlot( $slot ); |
| 411 | } |
| 412 | foreach ( $curRev->getSlotRoles() as $role ) { |
| 413 | if ( !$newRev->hasSlot( $role ) ) { |
| 414 | $updater->removeSlot( $role ); |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | $updater->markAsRevert( EditResult::REVERT_UNDO, $this->undo, $this->undoafter ); |
| 419 | |
| 420 | if ( $this->useRCPatrol && $this->getAuthority() |
| 421 | ->authorizeWrite( 'autopatrol', $this->getTitle() ) |
| 422 | ) { |
| 423 | $updater->setRcPatrolStatus( RecentChange::PRC_AUTOPATROLLED ); |
| 424 | } |
| 425 | |
| 426 | $updater->saveRevision( |
| 427 | CommentStoreComment::newUnsavedComment( |
| 428 | trim( $this->getRequest()->getVal( 'wpSummary' ) ?? '' ) ), |
| 429 | EDIT_AUTOSUMMARY | EDIT_UPDATE |
| 430 | ); |
| 431 | |
| 432 | return $updater->getStatus(); |
| 433 | } |
| 434 | |
| 435 | return Status::newGood(); |
| 436 | } |
| 437 | |
| 438 | protected function usesOOUI() { |
| 439 | return true; |
| 440 | } |
| 441 | |
| 442 | protected function getFormFields() { |
| 443 | $request = $this->getRequest(); |
| 444 | $ret = [ |
| 445 | 'diff' => [ |
| 446 | 'type' => 'info', |
| 447 | 'raw' => true, |
| 448 | 'default' => function () { |
| 449 | return $this->generateDiffOrPreview(); |
| 450 | } |
| 451 | ], |
| 452 | 'summary' => [ |
| 453 | 'type' => 'text', |
| 454 | 'id' => 'wpSummary', |
| 455 | 'name' => 'wpSummary', |
| 456 | 'cssclass' => 'mw-summary', |
| 457 | 'label-message' => 'summary', |
| 458 | 'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT, |
| 459 | 'value' => $request->getVal( 'wpSummary', '' ), |
| 460 | 'size' => 60, |
| 461 | 'spellcheck' => 'true', |
| 462 | ], |
| 463 | 'summarypreview' => [ |
| 464 | 'type' => 'info', |
| 465 | 'label-message' => 'summary-preview', |
| 466 | 'raw' => true, |
| 467 | ], |
| 468 | ]; |
| 469 | |
| 470 | if ( $request->getCheck( 'wpSummary' ) ) { |
| 471 | $ret['summarypreview']['default'] = Html::rawElement( |
| 472 | 'div', |
| 473 | [ 'class' => 'mw-summary-preview' ], |
| 474 | $this->commentFormatter->formatBlock( |
| 475 | trim( $request->getVal( 'wpSummary' ) ), |
| 476 | $this->getTitle(), |
| 477 | false |
| 478 | ) |
| 479 | ); |
| 480 | } else { |
| 481 | unset( $ret['summarypreview'] ); |
| 482 | } |
| 483 | |
| 484 | return $ret; |
| 485 | } |
| 486 | |
| 487 | protected function alterForm( HTMLForm $form ) { |
| 488 | $form->setWrapperLegendMsg( 'confirm-mcrundo-title' ); |
| 489 | |
| 490 | $labelAsPublish = $this->context->getConfig()->get( MainConfigNames::EditSubmitButtonLabelPublish ); |
| 491 | |
| 492 | $form->setId( 'mw-mcrundo-form' ); |
| 493 | $form->setSubmitName( 'wpSave' ); |
| 494 | $form->setSubmitTooltip( $labelAsPublish ? 'publish' : 'save' ); |
| 495 | $form->setSubmitTextMsg( $labelAsPublish ? 'publishchanges' : 'savechanges' ); |
| 496 | $form->showCancel( true ); |
| 497 | $form->setCancelTarget( $this->getTitle() ); |
| 498 | $form->addButton( [ |
| 499 | 'name' => 'wpPreview', |
| 500 | 'value' => '1', |
| 501 | 'label-message' => 'showpreview', |
| 502 | 'attribs' => Linker::tooltipAndAccesskeyAttribs( 'preview' ), |
| 503 | ] ); |
| 504 | $form->addButton( [ |
| 505 | 'name' => 'wpDiff', |
| 506 | 'value' => '1', |
| 507 | 'label-message' => 'showdiff', |
| 508 | 'attribs' => Linker::tooltipAndAccesskeyAttribs( 'diff' ), |
| 509 | ] ); |
| 510 | |
| 511 | $this->addStatePropagationFields( $form ); |
| 512 | } |
| 513 | |
| 514 | protected function addStatePropagationFields( HTMLForm $form ) { |
| 515 | $form->addHiddenField( 'undo', $this->undo ); |
| 516 | $form->addHiddenField( 'undoafter', $this->undoafter ); |
| 517 | $form->addHiddenField( 'cur', $this->curRev->getId() ); |
| 518 | } |
| 519 | |
| 520 | public function onSuccess() { |
| 521 | $this->getOutput()->redirect( $this->getTitle()->getFullURL() ); |
| 522 | } |
| 523 | |
| 524 | protected function preText() { |
| 525 | return '<div style="clear:both"></div>'; |
| 526 | } |
| 527 | } |