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| 1 | <?php |
| 2 | /** |
| 3 | * User interface for the difference engine. |
| 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 | |
| 24 | use MediaWiki\CommentFormatter\CommentFormatter; |
| 25 | use MediaWiki\Content\IContentHandlerFactory; |
| 26 | use MediaWiki\Context\ContextSource; |
| 27 | use MediaWiki\Context\IContextSource; |
| 28 | use MediaWiki\Diff\TextDiffer\ManifoldTextDiffer; |
| 29 | use MediaWiki\HookContainer\HookRunner; |
| 30 | use MediaWiki\Html\Html; |
| 31 | use MediaWiki\Linker\Linker; |
| 32 | use MediaWiki\Linker\LinkRenderer; |
| 33 | use MediaWiki\MainConfigNames; |
| 34 | use MediaWiki\MediaWikiServices; |
| 35 | use MediaWiki\Page\ParserOutputAccess; |
| 36 | use MediaWiki\Page\WikiPageFactory; |
| 37 | use MediaWiki\Permissions\Authority; |
| 38 | use MediaWiki\Permissions\PermissionStatus; |
| 39 | use MediaWiki\Revision\ArchivedRevisionLookup; |
| 40 | use MediaWiki\Revision\BadRevisionException; |
| 41 | use MediaWiki\Revision\RevisionRecord; |
| 42 | use MediaWiki\Revision\RevisionStore; |
| 43 | use MediaWiki\Revision\SlotRecord; |
| 44 | use MediaWiki\SpecialPage\SpecialPage; |
| 45 | use MediaWiki\Storage\NameTableAccessException; |
| 46 | use MediaWiki\Title\Title; |
| 47 | use MediaWiki\User\Options\UserOptionsLookup; |
| 48 | use MediaWiki\User\UserEditTracker; |
| 49 | use MediaWiki\User\UserGroupManager; |
| 50 | use MediaWiki\User\UserGroupMembership; |
| 51 | use MediaWiki\User\UserIdentity; |
| 52 | use MediaWiki\User\UserIdentityUtils; |
| 53 | use Wikimedia\Rdbms\IConnectionProvider; |
| 54 | |
| 55 | /** |
| 56 | * DifferenceEngine is responsible for rendering the difference between two revisions as HTML. |
| 57 | * This includes interpreting URL parameters, retrieving revision data, checking access permissions, |
| 58 | * selecting and invoking the diff generator class for the individual slots, doing post-processing |
| 59 | * on the generated diff, adding the rest of the HTML (such as headers) and writing the whole thing |
| 60 | * to OutputPage. |
| 61 | * |
| 62 | * DifferenceEngine can be subclassed by extensions, by customizing |
| 63 | * ContentHandler::createDifferenceEngine; the content handler will be selected based on the |
| 64 | * content model of the main slot (of the new revision, when the two are different). |
| 65 | * That might change after PageTypeHandler gets introduced. |
| 66 | * |
| 67 | * In the past, the class was also used for slot-level diff generation, and extensions might still |
| 68 | * subclass it and add such functionality. When that is the case (specifically, when a |
| 69 | * ContentHandler returns a standard SlotDiffRenderer but a nonstandard DifferenceEngine) |
| 70 | * DifferenceEngineSlotDiffRenderer will be used to convert the old behavior into the new one. |
| 71 | * |
| 72 | * @ingroup DifferenceEngine |
| 73 | * |
| 74 | * @todo This class is huge and poorly defined. It should be split into a controller responsible |
| 75 | * for interpreting query parameters, retrieving data and checking permissions; and a HTML renderer. |
| 76 | */ |
| 77 | class DifferenceEngine extends ContextSource { |
| 78 | |
| 79 | use DeprecationHelper; |
| 80 | |
| 81 | /** |
| 82 | * Constant to indicate diff cache compatibility. |
| 83 | * Bump this when changing the diff formatting in a way that |
| 84 | * fixes important bugs or such to force cached diff views to |
| 85 | * clear. |
| 86 | */ |
| 87 | private const DIFF_VERSION = '1.41'; |
| 88 | |
| 89 | /** |
| 90 | * Revision ID for the old revision. 0 for the revision previous to $mNewid, false |
| 91 | * if the diff does not have an old revision (e.g. 'oldid=<first revision of page>&diff=prev'), |
| 92 | * or the revision does not exist, null if the revision is unsaved. |
| 93 | * @var int|false|null |
| 94 | */ |
| 95 | protected $mOldid; |
| 96 | |
| 97 | /** |
| 98 | * Revision ID for the new revision. 0 for the last revision of the current page |
| 99 | * (as defined by the request context), false if the revision does not exist, null |
| 100 | * if it is unsaved, or an alias such as 'next'. |
| 101 | * @var int|string|false|null |
| 102 | */ |
| 103 | protected $mNewid; |
| 104 | |
| 105 | /** |
| 106 | * Old revision (left pane). |
| 107 | * Allowed to be an unsaved revision, unlikely that's ever needed though. |
| 108 | * False when the old revision does not exist; this can happen when using |
| 109 | * diff=prev on the first revision. Null when the revision should exist but |
| 110 | * doesn't (e.g. load failure); loadRevisionData() will return false in that |
| 111 | * case. Also null until lazy-loaded. Ignored completely when isContentOverridden |
| 112 | * is set. |
| 113 | * @var RevisionRecord|null|false |
| 114 | */ |
| 115 | private $mOldRevisionRecord; |
| 116 | |
| 117 | /** |
| 118 | * New revision (right pane). |
| 119 | * Note that this might be an unsaved revision (e.g. for edit preview). |
| 120 | * Null in case of load failure; diff methods will just return an error message in that case, |
| 121 | * and loadRevisionData() will return false. Also null until lazy-loaded. Ignored completely |
| 122 | * when isContentOverridden is set. |
| 123 | * @var RevisionRecord|null |
| 124 | */ |
| 125 | private $mNewRevisionRecord; |
| 126 | |
| 127 | /** |
| 128 | * Title of old revision or null if the old revision does not exist or does not belong to a page. |
| 129 | * @var Title|null |
| 130 | */ |
| 131 | protected $mOldPage; |
| 132 | |
| 133 | /** |
| 134 | * Title of new revision or null if the new revision does not exist or does not belong to a page. |
| 135 | * @var Title|null |
| 136 | */ |
| 137 | protected $mNewPage; |
| 138 | |
| 139 | /** |
| 140 | * Change tags of old revision or null if it does not exist / is not saved. |
| 141 | * @var string|false|null |
| 142 | */ |
| 143 | private $mOldTags; |
| 144 | |
| 145 | /** |
| 146 | * Change tags of new revision or null if it does not exist / is not saved. |
| 147 | * @var string|null |
| 148 | */ |
| 149 | private $mNewTags; |
| 150 | |
| 151 | /** |
| 152 | * @var Content|null |
| 153 | * @deprecated since 1.32, content slots are now handled by the corresponding SlotDiffRenderer. |
| 154 | * This property is set to the content of the main slot, but not actually used for the main diff. |
| 155 | */ |
| 156 | private $mOldContent; |
| 157 | |
| 158 | /** |
| 159 | * @var Content|null |
| 160 | * @deprecated since 1.32, content slots are now handled by the corresponding SlotDiffRenderer. |
| 161 | * This property is set to the content of the main slot, but not actually used for the main diff. |
| 162 | */ |
| 163 | private $mNewContent; |
| 164 | |
| 165 | /** @var Language */ |
| 166 | protected $mDiffLang; |
| 167 | |
| 168 | /** @var bool Have the revisions IDs been loaded */ |
| 169 | private $mRevisionsIdsLoaded = false; |
| 170 | |
| 171 | /** @var bool Have the revisions been loaded */ |
| 172 | protected $mRevisionsLoaded = false; |
| 173 | |
| 174 | /** @var int How many text blobs have been loaded, 0, 1 or 2? */ |
| 175 | protected $mTextLoaded = 0; |
| 176 | |
| 177 | /** |
| 178 | * Was the content overridden via setContent()? |
| 179 | * If the content was overridden, most internal state (e.g. mOldid or mOldRev) should be ignored |
| 180 | * and only mOldContent and mNewContent is reliable. |
| 181 | * (Note that setRevisions() does not set this flag as in that case all properties are |
| 182 | * overridden and remain consistent with each other, so no special handling is needed.) |
| 183 | * @var bool |
| 184 | */ |
| 185 | protected $isContentOverridden = false; |
| 186 | |
| 187 | /** @var bool Was the diff fetched from cache? */ |
| 188 | protected $mCacheHit = false; |
| 189 | |
| 190 | /** @var string|null Cache key if the diff was fetched from cache */ |
| 191 | private $cacheHitKey = null; |
| 192 | |
| 193 | /** |
| 194 | * Set this to true to add debug info to the HTML output. |
| 195 | * Warning: this may cause RSS readers to spuriously mark articles as "new" |
| 196 | * (T22601) |
| 197 | * @var bool |
| 198 | */ |
| 199 | public $enableDebugComment = false; |
| 200 | |
| 201 | /** @var bool If true, line X is not displayed when X is 1, for example |
| 202 | * to increase readability and conserve space with many small diffs. |
| 203 | */ |
| 204 | protected $mReducedLineNumbers = false; |
| 205 | |
| 206 | /** @var string Link to action=markpatrolled */ |
| 207 | protected $mMarkPatrolledLink = null; |
| 208 | |
| 209 | /** @var bool Show rev_deleted content if allowed */ |
| 210 | protected $unhide = false; |
| 211 | |
| 212 | /** @var bool Refresh the diff cache */ |
| 213 | protected $mRefreshCache = false; |
| 214 | |
| 215 | /** @var SlotDiffRenderer[]|null DifferenceEngine classes for the slots, keyed by role name. */ |
| 216 | protected $slotDiffRenderers = null; |
| 217 | |
| 218 | /** |
| 219 | * Temporary hack for B/C while slot diff related methods of DifferenceEngine are being |
| 220 | * deprecated. When true, we are inside a DifferenceEngineSlotDiffRenderer and |
| 221 | * $slotDiffRenderers should not be used. |
| 222 | * @var bool |
| 223 | */ |
| 224 | protected $isSlotDiffRenderer = false; |
| 225 | |
| 226 | /** |
| 227 | * A set of options that will be passed to the SlotDiffRenderer upon creation |
| 228 | * @var array |
| 229 | */ |
| 230 | private $slotDiffOptions = []; |
| 231 | |
| 232 | /** |
| 233 | * Extra query parameters to be appended to diff page links |
| 234 | */ |
| 235 | private $extraQueryParams = []; |
| 236 | |
| 237 | /** @var ManifoldTextDiffer|null */ |
| 238 | private $textDiffer; |
| 239 | |
| 240 | protected LinkRenderer $linkRenderer; |
| 241 | private IContentHandlerFactory $contentHandlerFactory; |
| 242 | private RevisionStore $revisionStore; |
| 243 | private ArchivedRevisionLookup $archivedRevisionLookup; |
| 244 | private HookRunner $hookRunner; |
| 245 | private WikiPageFactory $wikiPageFactory; |
| 246 | private UserOptionsLookup $userOptionsLookup; |
| 247 | private CommentFormatter $commentFormatter; |
| 248 | private IConnectionProvider $dbProvider; |
| 249 | private UserGroupManager $userGroupManager; |
| 250 | private UserEditTracker $userEditTracker; |
| 251 | private UserIdentityUtils $userIdentityUtils; |
| 252 | |
| 253 | /** @var Message[] */ |
| 254 | private $revisionLoadErrors = []; |
| 255 | |
| 256 | /** |
| 257 | * @param IContextSource|null $context Context to use, anything else will be ignored |
| 258 | * @param int $old Old ID we want to show and diff with. |
| 259 | * @param string|int $new Either revision ID or 'prev' or 'next'. Default: 0. |
| 260 | * @param int $rcid Deprecated, no longer used! |
| 261 | * @param bool $refreshCache If set, refreshes the diff cache |
| 262 | * @param bool $unhide If set, allow viewing deleted revs |
| 263 | */ |
| 264 | public function __construct( $context = null, $old = 0, $new = 0, $rcid = 0, |
| 265 | $refreshCache = false, $unhide = false |
| 266 | ) { |
| 267 | if ( $context instanceof IContextSource ) { |
| 268 | $this->setContext( $context ); |
| 269 | } |
| 270 | |
| 271 | wfDebug( "DifferenceEngine old '$old' new '$new' rcid '$rcid'" ); |
| 272 | |
| 273 | $this->mOldid = $old; |
| 274 | $this->mNewid = $new; |
| 275 | $this->mRefreshCache = $refreshCache; |
| 276 | $this->unhide = $unhide; |
| 277 | |
| 278 | $services = MediaWikiServices::getInstance(); |
| 279 | $this->linkRenderer = $services->getLinkRenderer(); |
| 280 | $this->contentHandlerFactory = $services->getContentHandlerFactory(); |
| 281 | $this->revisionStore = $services->getRevisionStore(); |
| 282 | $this->archivedRevisionLookup = $services->getArchivedRevisionLookup(); |
| 283 | $this->hookRunner = new HookRunner( $services->getHookContainer() ); |
| 284 | $this->wikiPageFactory = $services->getWikiPageFactory(); |
| 285 | $this->userOptionsLookup = $services->getUserOptionsLookup(); |
| 286 | $this->commentFormatter = $services->getCommentFormatter(); |
| 287 | $this->dbProvider = $services->getConnectionProvider(); |
| 288 | $this->userGroupManager = $services->getUserGroupManager(); |
| 289 | $this->userEditTracker = $services->getUserEditTracker(); |
| 290 | $this->userIdentityUtils = $services->getUserIdentityUtils(); |
| 291 | } |
| 292 | |
| 293 | /** |
| 294 | * @return SlotDiffRenderer[] Diff renderers for each slot, keyed by role name. |
| 295 | * Includes slots only present in one of the revisions. Does not include slots |
| 296 | * for which content is identical in the two revisions. |
| 297 | */ |
| 298 | protected function getSlotDiffRenderers() { |
| 299 | if ( $this->isSlotDiffRenderer ) { |
| 300 | throw new LogicException( __METHOD__ . ' called in slot diff renderer mode' ); |
| 301 | } |
| 302 | |
| 303 | if ( $this->slotDiffRenderers === null ) { |
| 304 | if ( !$this->loadRevisionData() ) { |
| 305 | return []; |
| 306 | } |
| 307 | |
| 308 | $slotContents = $this->getSlotContents(); |
| 309 | $this->slotDiffRenderers = []; |
| 310 | foreach ( $slotContents as $role => $contents ) { |
| 311 | if ( $contents['new'] && $contents['old'] |
| 312 | && $contents['new']->equals( $contents['old'] ) |
| 313 | ) { |
| 314 | // Do not produce a diff of identical content |
| 315 | continue; |
| 316 | } |
| 317 | $handler = ( $contents['new'] ?: $contents['old'] )->getContentHandler(); |
| 318 | $this->slotDiffRenderers[$role] = $handler->getSlotDiffRenderer( |
| 319 | $this->getContext(), |
| 320 | $this->slotDiffOptions + [ |
| 321 | 'contentLanguage' => $this->getDiffLang()->getCode(), |
| 322 | 'textDiffer' => $this->getTextDiffer() |
| 323 | ] |
| 324 | ); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | return $this->slotDiffRenderers; |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * Mark this DifferenceEngine as a slot renderer (as opposed to a page renderer). |
| 333 | * This is used in legacy mode when the DifferenceEngine is wrapped in a |
| 334 | * DifferenceEngineSlotDiffRenderer. |
| 335 | * @internal For use by DifferenceEngineSlotDiffRenderer only. |
| 336 | */ |
| 337 | public function markAsSlotDiffRenderer() { |
| 338 | $this->isSlotDiffRenderer = true; |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * Get the old and new content objects for all slots. |
| 343 | * This method does not do any permission checks. |
| 344 | * @return (Content|null)[][] [ role => [ 'old' => Content|null, 'new' => Content|null ], ... ] |
| 345 | */ |
| 346 | protected function getSlotContents() { |
| 347 | if ( $this->isContentOverridden ) { |
| 348 | return [ |
| 349 | SlotRecord::MAIN => [ 'old' => $this->mOldContent, 'new' => $this->mNewContent ] |
| 350 | ]; |
| 351 | } elseif ( !$this->loadRevisionData() ) { |
| 352 | return []; |
| 353 | } |
| 354 | |
| 355 | $newSlots = $this->mNewRevisionRecord->getPrimarySlots()->getSlots(); |
| 356 | $oldSlots = $this->mOldRevisionRecord ? |
| 357 | $this->mOldRevisionRecord->getPrimarySlots()->getSlots() : |
| 358 | []; |
| 359 | // The order here will determine the visual order of the diff. The current logic is |
| 360 | // slots of the new revision first in natural order, then deleted ones. This is ad hoc |
| 361 | // and should not be relied on - in the future we may want the ordering to depend |
| 362 | // on the page type. |
| 363 | $roles = array_keys( array_merge( $newSlots, $oldSlots ) ); |
| 364 | |
| 365 | $slots = []; |
| 366 | foreach ( $roles as $role ) { |
| 367 | $slots[$role] = [ |
| 368 | 'old' => $this->loadSingleSlot( |
| 369 | $oldSlots[$role] ?? null, |
| 370 | 'old' |
| 371 | ), |
| 372 | 'new' => $this->loadSingleSlot( |
| 373 | $newSlots[$role] ?? null, |
| 374 | 'new' |
| 375 | ) |
| 376 | ]; |
| 377 | } |
| 378 | // move main slot to front |
| 379 | if ( isset( $slots[SlotRecord::MAIN] ) ) { |
| 380 | $slots = [ SlotRecord::MAIN => $slots[SlotRecord::MAIN] ] + $slots; |
| 381 | } |
| 382 | return $slots; |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * Load the content of a single slot record |
| 387 | * |
| 388 | * @param SlotRecord|null $slot |
| 389 | * @param string $which "new" or "old" |
| 390 | * @return Content|null |
| 391 | */ |
| 392 | private function loadSingleSlot( ?SlotRecord $slot, string $which ) { |
| 393 | if ( !$slot ) { |
| 394 | return null; |
| 395 | } |
| 396 | try { |
| 397 | return $slot->getContent(); |
| 398 | } catch ( BadRevisionException $e ) { |
| 399 | $this->addRevisionLoadError( $which ); |
| 400 | return null; |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | /** |
| 405 | * Set a message to show as a notice at the top of the page |
| 406 | * |
| 407 | * @param string $which "new" or "old" |
| 408 | */ |
| 409 | private function addRevisionLoadError( $which ) { |
| 410 | $this->revisionLoadErrors[] = $this->msg( $which === 'new' |
| 411 | ? 'difference-bad-new-revision' : 'difference-bad-old-revision' |
| 412 | ); |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * If errors were encountered while loading the revision contents, this |
| 417 | * will return an array of Messages describing the errors. |
| 418 | * |
| 419 | * @return Message[] |
| 420 | */ |
| 421 | public function getRevisionLoadErrors() { |
| 422 | return $this->revisionLoadErrors; |
| 423 | } |
| 424 | |
| 425 | /** |
| 426 | * Determine whether there was an error loading the new revision |
| 427 | * @return bool |
| 428 | */ |
| 429 | private function hasNewRevisionLoadError() { |
| 430 | foreach ( $this->revisionLoadErrors as $error ) { |
| 431 | if ( $error->getKey() === 'difference-bad-new-revision' ) { |
| 432 | return true; |
| 433 | } |
| 434 | } |
| 435 | return false; |
| 436 | } |
| 437 | |
| 438 | /** @inheritDoc */ |
| 439 | public function getTitle() { |
| 440 | // T202454 avoid errors when there is no title |
| 441 | return parent::getTitle() ?: Title::makeTitle( NS_SPECIAL, 'BadTitle/DifferenceEngine' ); |
| 442 | } |
| 443 | |
| 444 | /** |
| 445 | * Set reduced line numbers mode. |
| 446 | * When set, line X is not displayed when X is 1, for example to increase readability and |
| 447 | * conserve space with many small diffs. |
| 448 | * @param bool $value |
| 449 | */ |
| 450 | public function setReducedLineNumbers( $value = true ) { |
| 451 | $this->mReducedLineNumbers = $value; |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * Get the language in which the diff text is written |
| 456 | * |
| 457 | * @return Language |
| 458 | */ |
| 459 | public function getDiffLang() { |
| 460 | # Default language in which the diff text is written. |
| 461 | $this->mDiffLang ??= $this->getDefaultLanguage(); |
| 462 | return $this->mDiffLang; |
| 463 | } |
| 464 | |
| 465 | /** |
| 466 | * Get the language to use if none has been set by setTextLanguage(). |
| 467 | * Wikibase overrides this to use the user language. |
| 468 | * |
| 469 | * @return Language |
| 470 | */ |
| 471 | protected function getDefaultLanguage() { |
| 472 | return $this->getTitle()->getPageLanguage(); |
| 473 | } |
| 474 | |
| 475 | /** |
| 476 | * @return bool |
| 477 | */ |
| 478 | public function wasCacheHit() { |
| 479 | return $this->mCacheHit; |
| 480 | } |
| 481 | |
| 482 | /** |
| 483 | * Get the ID of old revision (left pane) of the diff. 0 for the revision |
| 484 | * previous to getNewid(), false if the old revision does not exist, null |
| 485 | * if it's unsaved. |
| 486 | * To get a real revision ID instead of 0, call loadRevisionData() first. |
| 487 | * @return int|false|null |
| 488 | */ |
| 489 | public function getOldid() { |
| 490 | $this->loadRevisionIds(); |
| 491 | |
| 492 | return $this->mOldid; |
| 493 | } |
| 494 | |
| 495 | /** |
| 496 | * Get the ID of new revision (right pane) of the diff. 0 for the current revision, |
| 497 | * false if the new revision does not exist, null if it's unsaved. |
| 498 | * To get a real revision ID instead of 0, call loadRevisionData() first. |
| 499 | * @return int|false|null |
| 500 | */ |
| 501 | public function getNewid() { |
| 502 | $this->loadRevisionIds(); |
| 503 | |
| 504 | return $this->mNewid; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * Get the left side of the diff. |
| 509 | * Could be null when the first revision of the page is diffed to 'prev' (or in the case of |
| 510 | * load failure). |
| 511 | * @return RevisionRecord|null |
| 512 | */ |
| 513 | public function getOldRevision() { |
| 514 | return $this->mOldRevisionRecord ?: null; |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * Get the right side of the diff. |
| 519 | * Should not be null but can still happen in the case of load failure. |
| 520 | * @return RevisionRecord|null |
| 521 | */ |
| 522 | public function getNewRevision() { |
| 523 | return $this->mNewRevisionRecord; |
| 524 | } |
| 525 | |
| 526 | /** |
| 527 | * Look up a special:Undelete link to the given deleted revision id, |
| 528 | * as a workaround for being unable to load deleted diffs in currently. |
| 529 | * |
| 530 | * @param int $id Revision ID |
| 531 | * |
| 532 | * @return string|bool Link HTML or false |
| 533 | */ |
| 534 | public function deletedLink( $id ) { |
| 535 | if ( $this->getAuthority()->isAllowed( 'deletedhistory' ) ) { |
| 536 | $revRecord = $this->archivedRevisionLookup->getArchivedRevisionRecord( null, $id ); |
| 537 | if ( $revRecord ) { |
| 538 | $title = Title::newFromPageIdentity( $revRecord->getPage() ); |
| 539 | |
| 540 | return SpecialPage::getTitleFor( 'Undelete' )->getFullURL( [ |
| 541 | 'target' => $title->getPrefixedText(), |
| 542 | 'timestamp' => $revRecord->getTimestamp() |
| 543 | ] ); |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | return false; |
| 548 | } |
| 549 | |
| 550 | /** |
| 551 | * Build a wikitext link toward a deleted revision, if viewable. |
| 552 | * |
| 553 | * @param int $id Revision ID |
| 554 | * |
| 555 | * @return string Wikitext fragment |
| 556 | */ |
| 557 | public function deletedIdMarker( $id ) { |
| 558 | $link = $this->deletedLink( $id ); |
| 559 | if ( $link ) { |
| 560 | return "[$link $id]"; |
| 561 | } else { |
| 562 | return (string)$id; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | private function showMissingRevision() { |
| 567 | $out = $this->getOutput(); |
| 568 | |
| 569 | $missing = []; |
| 570 | if ( $this->mOldid && ( !$this->mOldRevisionRecord || !$this->mOldContent ) ) { |
| 571 | $missing[] = $this->deletedIdMarker( $this->mOldid ); |
| 572 | } |
| 573 | if ( !$this->mNewRevisionRecord || !$this->mNewContent ) { |
| 574 | $missing[] = $this->deletedIdMarker( $this->mNewid ); |
| 575 | } |
| 576 | |
| 577 | $out->setPageTitleMsg( $this->msg( 'errorpagetitle' ) ); |
| 578 | $msg = $this->msg( 'difference-missing-revision' ) |
| 579 | ->params( $this->getLanguage()->listToText( $missing ) ) |
| 580 | ->numParams( count( $missing ) ) |
| 581 | ->parseAsBlock(); |
| 582 | $out->addHTML( $msg ); |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * Checks whether one of the given Revisions was deleted |
| 587 | * |
| 588 | * @return bool |
| 589 | */ |
| 590 | public function hasDeletedRevision() { |
| 591 | $this->loadRevisionData(); |
| 592 | return ( |
| 593 | $this->mNewRevisionRecord && |
| 594 | $this->mNewRevisionRecord->isDeleted( RevisionRecord::DELETED_TEXT ) |
| 595 | ) || |
| 596 | ( |
| 597 | $this->mOldRevisionRecord && |
| 598 | $this->mOldRevisionRecord->isDeleted( RevisionRecord::DELETED_TEXT ) |
| 599 | ); |
| 600 | } |
| 601 | |
| 602 | /** |
| 603 | * Get the permission errors associated with the revisions for the current diff. |
| 604 | * |
| 605 | * @param Authority $performer |
| 606 | * @return array[] Array of arrays of the arguments to wfMessage to explain permissions problems. |
| 607 | */ |
| 608 | public function getPermissionErrors( Authority $performer ) { |
| 609 | $this->loadRevisionData(); |
| 610 | $permStatus = PermissionStatus::newEmpty(); |
| 611 | if ( $this->mNewPage ) { |
| 612 | $performer->authorizeRead( 'read', $this->mNewPage, $permStatus ); |
| 613 | } |
| 614 | if ( $this->mOldPage ) { |
| 615 | $performer->authorizeRead( 'read', $this->mOldPage, $permStatus ); |
| 616 | } |
| 617 | return $permStatus->toLegacyErrorArray(); |
| 618 | } |
| 619 | |
| 620 | /** |
| 621 | * Checks whether one of the given Revisions was suppressed |
| 622 | * |
| 623 | * @return bool |
| 624 | */ |
| 625 | public function hasSuppressedRevision() { |
| 626 | return $this->hasDeletedRevision() && ( |
| 627 | ( $this->mOldRevisionRecord && |
| 628 | $this->mOldRevisionRecord->isDeleted( RevisionRecord::DELETED_RESTRICTED ) ) || |
| 629 | ( $this->mNewRevisionRecord && |
| 630 | $this->mNewRevisionRecord->isDeleted( RevisionRecord::DELETED_RESTRICTED ) ) |
| 631 | ); |
| 632 | } |
| 633 | |
| 634 | /** |
| 635 | * Renders user associated edit count |
| 636 | * |
| 637 | * @param UserIdentity $user |
| 638 | * @return string |
| 639 | */ |
| 640 | private function getUserEditCount( $user ): string { |
| 641 | $editCount = $this->userEditTracker->getUserEditCount( $user ); |
| 642 | if ( $editCount === null ) { |
| 643 | return ''; |
| 644 | } |
| 645 | |
| 646 | return Html::rawElement( 'div', [ |
| 647 | 'class' => 'mw-diff-usereditcount', |
| 648 | ], |
| 649 | $this->msg( |
| 650 | 'diff-user-edits', |
| 651 | $this->getLanguage()->formatNum( $editCount ) |
| 652 | )->parse() |
| 653 | ); |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * Renders user roles |
| 658 | * |
| 659 | * @param UserIdentity $user |
| 660 | * @return string |
| 661 | */ |
| 662 | private function getUserRoles( UserIdentity $user ) { |
| 663 | if ( !$this->userIdentityUtils->isNamed( $user ) ) { |
| 664 | return ''; |
| 665 | } |
| 666 | $userGroups = $this->userGroupManager->getUserGroups( $user ); |
| 667 | $userGroupLinks = []; |
| 668 | foreach ( $userGroups as $group ) { |
| 669 | $userGroupLinks[] = UserGroupMembership::getLinkHTML( $group, $this->getContext() ); |
| 670 | } |
| 671 | return Html::rawElement( 'div', [ |
| 672 | 'class' => 'mw-diff-userroles', |
| 673 | ], $this->getLanguage()->commaList( $userGroupLinks ) ); |
| 674 | } |
| 675 | |
| 676 | /** |
| 677 | * Renders user associated meta data |
| 678 | * |
| 679 | * @param UserIdentity|null $user |
| 680 | * @return string |
| 681 | */ |
| 682 | private function getUserMetaData( ?UserIdentity $user ) { |
| 683 | if ( !$user ) { |
| 684 | return ''; |
| 685 | } |
| 686 | return Html::rawElement( 'div', [ |
| 687 | 'class' => 'mw-diff-usermetadata', |
| 688 | ], $this->getUserRoles( $user ) . $this->getUserEditCount( $user ) ); |
| 689 | } |
| 690 | |
| 691 | /** |
| 692 | * Checks whether the current user has permission for accessing the revisions of the diff. |
| 693 | * Note that this does not check whether the user has permission to view the page, it only |
| 694 | * checks revdelete permissions. |
| 695 | * |
| 696 | * It is the caller's responsibility to call |
| 697 | * $this->getUserPermissionErrors or similar checks. |
| 698 | * |
| 699 | * @param Authority $performer |
| 700 | * @return bool |
| 701 | */ |
| 702 | public function isUserAllowedToSeeRevisions( Authority $performer ) { |
| 703 | $this->loadRevisionData(); |
| 704 | |
| 705 | if ( $this->mOldRevisionRecord && !$this->mOldRevisionRecord->userCan( |
| 706 | RevisionRecord::DELETED_TEXT, |
| 707 | $performer |
| 708 | ) ) { |
| 709 | return false; |
| 710 | } |
| 711 | |
| 712 | // $this->mNewRev will only be falsy if a loading error occurred |
| 713 | // (in which case the user is allowed to see). |
| 714 | return !$this->mNewRevisionRecord || $this->mNewRevisionRecord->userCan( |
| 715 | RevisionRecord::DELETED_TEXT, |
| 716 | $performer |
| 717 | ); |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * Checks whether the diff should be hidden from the current user |
| 722 | * This is based on whether the user is allowed to see it and has specifically asked to see it. |
| 723 | * |
| 724 | * @param Authority $performer |
| 725 | * @return bool |
| 726 | */ |
| 727 | public function shouldBeHiddenFromUser( Authority $performer ) { |
| 728 | return $this->hasDeletedRevision() && ( !$this->unhide || |
| 729 | !$this->isUserAllowedToSeeRevisions( $performer ) ); |
| 730 | } |
| 731 | |
| 732 | /** |
| 733 | * @param bool $diffOnly |
| 734 | */ |
| 735 | public function showDiffPage( $diffOnly = false ) { |
| 736 | # Allow frames except in certain special cases |
| 737 | $out = $this->getOutput(); |
| 738 | $out->setPreventClickjacking( false ); |
| 739 | $out->setRobotPolicy( 'noindex,nofollow' ); |
| 740 | |
| 741 | // Allow extensions to add any extra output here |
| 742 | $this->hookRunner->onDifferenceEngineShowDiffPage( $out ); |
| 743 | |
| 744 | if ( !$this->loadRevisionData() ) { |
| 745 | if ( $this->hookRunner->onDifferenceEngineShowDiffPageMaybeShowMissingRevision( $this ) ) { |
| 746 | $this->showMissingRevision(); |
| 747 | } |
| 748 | return; |
| 749 | } |
| 750 | |
| 751 | $user = $this->getUser(); |
| 752 | $permErrors = $this->getPermissionErrors( $this->getAuthority() ); |
| 753 | if ( $permErrors ) { |
| 754 | throw new PermissionsError( 'read', $permErrors ); |
| 755 | } |
| 756 | |
| 757 | $rollback = ''; |
| 758 | |
| 759 | $query = $this->extraQueryParams; |
| 760 | # Carry over 'diffonly' param via navigation links |
| 761 | if ( $diffOnly != MediaWikiServices::getInstance() |
| 762 | ->getUserOptionsLookup()->getBoolOption( $user, 'diffonly' ) |
| 763 | ) { |
| 764 | $query['diffonly'] = $diffOnly; |
| 765 | } |
| 766 | # Cascade unhide param in links for easy deletion browsing |
| 767 | if ( $this->unhide ) { |
| 768 | $query['unhide'] = 1; |
| 769 | } |
| 770 | |
| 771 | # Check if one of the revisions is deleted/suppressed |
| 772 | $deleted = $this->hasDeletedRevision(); |
| 773 | $suppressed = $this->hasSuppressedRevision(); |
| 774 | $allowed = $this->isUserAllowedToSeeRevisions( $this->getAuthority() ); |
| 775 | |
| 776 | $revisionTools = []; |
| 777 | $breadCrumbs = ''; |
| 778 | |
| 779 | # mOldRevisionRecord is false if the difference engine is called with a "vague" query for |
| 780 | # a diff between a version V and its previous version V' AND the version V |
| 781 | # is the first version of that article. In that case, V' does not exist. |
| 782 | if ( $this->mOldRevisionRecord === false ) { |
| 783 | if ( $this->mNewPage ) { |
| 784 | $out->setPageTitleMsg( |
| 785 | $this->msg( 'difference-title' )->plaintextParams( $this->mNewPage->getPrefixedText() ) |
| 786 | ); |
| 787 | } |
| 788 | $samePage = true; |
| 789 | $oldHeader = ''; |
| 790 | // Allow extensions to change the $oldHeader variable |
| 791 | $this->hookRunner->onDifferenceEngineOldHeaderNoOldRev( $oldHeader ); |
| 792 | } else { |
| 793 | $this->hookRunner->onDifferenceEngineViewHeader( $this ); |
| 794 | |
| 795 | if ( !$this->mOldPage || !$this->mNewPage ) { |
| 796 | // XXX say something to the user? |
| 797 | $samePage = false; |
| 798 | } elseif ( $this->mNewPage->equals( $this->mOldPage ) ) { |
| 799 | $out->setPageTitleMsg( |
| 800 | $this->msg( 'difference-title' )->plaintextParams( $this->mNewPage->getPrefixedText() ) |
| 801 | ); |
| 802 | $samePage = true; |
| 803 | } else { |
| 804 | $out->setPageTitleMsg( $this->msg( 'difference-title-multipage' )->plaintextParams( |
| 805 | $this->mOldPage->getPrefixedText(), $this->mNewPage->getPrefixedText() ) ); |
| 806 | $out->addSubtitle( $this->msg( 'difference-multipage' ) ); |
| 807 | $samePage = false; |
| 808 | } |
| 809 | |
| 810 | if ( $samePage && $this->mNewPage && |
| 811 | $this->getAuthority()->probablyCan( 'edit', $this->mNewPage ) |
| 812 | ) { |
| 813 | if ( $this->mNewRevisionRecord->isCurrent() && |
| 814 | $this->getAuthority()->probablyCan( 'rollback', $this->mNewPage ) |
| 815 | ) { |
| 816 | $rollbackLink = Linker::generateRollback( |
| 817 | $this->mNewRevisionRecord, |
| 818 | $this->getContext(), |
| 819 | [ 'noBrackets' ] |
| 820 | ); |
| 821 | if ( $rollbackLink ) { |
| 822 | $out->setPreventClickjacking( true ); |
| 823 | $rollback = "\u{00A0}\u{00A0}\u{00A0}" . $rollbackLink; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | if ( $this->userCanEdit( $this->mOldRevisionRecord ) && |
| 828 | $this->userCanEdit( $this->mNewRevisionRecord ) |
| 829 | ) { |
| 830 | $undoLink = $this->linkRenderer->makeKnownLink( |
| 831 | $this->mNewPage, |
| 832 | $this->msg( 'editundo' )->text(), |
| 833 | [ 'title' => Linker::titleAttrib( 'undo' ) ], |
| 834 | [ |
| 835 | 'action' => 'edit', |
| 836 | 'undoafter' => $this->mOldid, |
| 837 | 'undo' => $this->mNewid |
| 838 | ] |
| 839 | ); |
| 840 | $revisionTools['mw-diff-undo'] = $undoLink; |
| 841 | } |
| 842 | } |
| 843 | # Make "previous revision link" |
| 844 | $hasPrevious = $samePage && $this->mOldPage && |
| 845 | $this->revisionStore->getPreviousRevision( $this->mOldRevisionRecord ); |
| 846 | if ( $hasPrevious ) { |
| 847 | $prevlinkQuery = [ 'diff' => 'prev', 'oldid' => $this->mOldid ] + $query; |
| 848 | $prevlink = $this->linkRenderer->makeKnownLink( |
| 849 | $this->mOldPage, |
| 850 | $this->msg( 'previousdiff' )->text(), |
| 851 | [ 'id' => 'differences-prevlink' ], |
| 852 | $prevlinkQuery |
| 853 | ); |
| 854 | $breadCrumbs .= $this->linkRenderer->makeKnownLink( |
| 855 | $this->mOldPage, |
| 856 | $this->msg( 'previousdiff' )->text(), |
| 857 | [ |
| 858 | 'class' => 'mw-diff-revision-history-link-previous' |
| 859 | ], |
| 860 | $prevlinkQuery |
| 861 | ); |
| 862 | } else { |
| 863 | $prevlink = "\u{00A0}"; |
| 864 | } |
| 865 | |
| 866 | if ( $this->mOldRevisionRecord->isMinor() ) { |
| 867 | $oldminor = ChangesList::flag( 'minor' ); |
| 868 | } else { |
| 869 | $oldminor = ''; |
| 870 | } |
| 871 | |
| 872 | $oldRevRecord = $this->mOldRevisionRecord; |
| 873 | |
| 874 | $ldel = $this->revisionDeleteLink( $oldRevRecord ); |
| 875 | $oldRevisionHeader = $this->getRevisionHeader( $oldRevRecord, 'complete' ); |
| 876 | $oldChangeTags = ChangeTags::formatSummaryRow( $this->mOldTags, 'diff', $this->getContext() ); |
| 877 | $oldRevComment = $this->commentFormatter |
| 878 | ->formatRevision( |
| 879 | $oldRevRecord, $user, !$diffOnly, !$this->unhide, /** disable parentheseses */ false |
| 880 | ); |
| 881 | |
| 882 | if ( $oldRevComment === '' ) { |
| 883 | $defaultComment = $this->msg( 'changeslist-nocomment' )->escaped(); |
| 884 | $oldRevComment = "<span class=\"comment mw-comment-none\">$defaultComment</span>"; |
| 885 | } |
| 886 | |
| 887 | $oldHeader = '<div id="mw-diff-otitle1"><strong>' . $oldRevisionHeader . '</strong></div>' . |
| 888 | '<div id="mw-diff-otitle2">' . |
| 889 | Linker::revUserTools( $oldRevRecord, !$this->unhide ) . |
| 890 | $this->getUserMetaData( $oldRevRecord->getUser() ) . |
| 891 | '</div>' . |
| 892 | '<div id="mw-diff-otitle3">' . $oldminor . $oldRevComment . $ldel . '</div>' . |
| 893 | '<div id="mw-diff-otitle5">' . $oldChangeTags[0] . '</div>' . |
| 894 | '<div id="mw-diff-otitle4">' . $prevlink . '</div>'; |
| 895 | |
| 896 | // Allow extensions to change the $oldHeader variable |
| 897 | $this->hookRunner->onDifferenceEngineOldHeader( |
| 898 | $this, $oldHeader, $prevlink, $oldminor, $diffOnly, $ldel, $this->unhide ); |
| 899 | } |
| 900 | |
| 901 | $out->addJsConfigVars( [ |
| 902 | 'wgDiffOldId' => $this->mOldid, |
| 903 | 'wgDiffNewId' => $this->mNewid, |
| 904 | ] ); |
| 905 | |
| 906 | # Make "next revision link" |
| 907 | # Skip next link on the top revision |
| 908 | if ( $samePage && $this->mNewPage && !$this->mNewRevisionRecord->isCurrent() ) { |
| 909 | $nextlinkQuery = [ 'diff' => 'next', 'oldid' => $this->mNewid ] + $query; |
| 910 | $nextlink = $this->linkRenderer->makeKnownLink( |
| 911 | $this->mNewPage, |
| 912 | $this->msg( 'nextdiff' )->text(), |
| 913 | [ 'id' => 'differences-nextlink' ], |
| 914 | $nextlinkQuery |
| 915 | ); |
| 916 | $breadCrumbs .= $this->linkRenderer->makeKnownLink( |
| 917 | $this->mNewPage, |
| 918 | $this->msg( 'nextdiff' )->text(), |
| 919 | [ |
| 920 | 'class' => 'mw-diff-revision-history-link-next' |
| 921 | ], |
| 922 | $nextlinkQuery |
| 923 | ); |
| 924 | } else { |
| 925 | $nextlink = "\u{00A0}"; |
| 926 | } |
| 927 | |
| 928 | if ( $this->mNewRevisionRecord->isMinor() ) { |
| 929 | $newminor = ChangesList::flag( 'minor' ); |
| 930 | } else { |
| 931 | $newminor = ''; |
| 932 | } |
| 933 | |
| 934 | # Handle RevisionDelete links... |
| 935 | $rdel = $this->revisionDeleteLink( $this->mNewRevisionRecord ); |
| 936 | |
| 937 | # Allow extensions to define their own revision tools |
| 938 | $this->hookRunner->onDiffTools( |
| 939 | $this->mNewRevisionRecord, |
| 940 | $revisionTools, |
| 941 | $this->mOldRevisionRecord ?: null, |
| 942 | $user |
| 943 | ); |
| 944 | |
| 945 | $formattedRevisionTools = []; |
| 946 | // Put each one in parentheses (poor man's button) |
| 947 | foreach ( $revisionTools as $key => $tool ) { |
| 948 | $toolClass = is_string( $key ) ? $key : 'mw-diff-tool'; |
| 949 | $element = Html::rawElement( |
| 950 | 'span', |
| 951 | [ 'class' => $toolClass ], |
| 952 | $tool |
| 953 | ); |
| 954 | $formattedRevisionTools[] = $element; |
| 955 | } |
| 956 | |
| 957 | $newRevRecord = $this->mNewRevisionRecord; |
| 958 | |
| 959 | $newRevisionHeader = $this->getRevisionHeader( $newRevRecord, 'complete' ) . |
| 960 | ' ' . implode( ' ', $formattedRevisionTools ); |
| 961 | $newChangeTags = ChangeTags::formatSummaryRow( $this->mNewTags, 'diff', $this->getContext() ); |
| 962 | $newRevComment = $this->commentFormatter->formatRevision( |
| 963 | $newRevRecord, $user, !$diffOnly, !$this->unhide, /** disable parentheseses */ false |
| 964 | ); |
| 965 | |
| 966 | if ( $newRevComment === '' ) { |
| 967 | $defaultComment = $this->msg( 'changeslist-nocomment' )->escaped(); |
| 968 | $newRevComment = "<span class=\"comment mw-comment-none\">$defaultComment</span>"; |
| 969 | } |
| 970 | |
| 971 | $newHeader = '<div id="mw-diff-ntitle1"><strong>' . $newRevisionHeader . '</strong></div>' . |
| 972 | '<div id="mw-diff-ntitle2">' . Linker::revUserTools( $newRevRecord, !$this->unhide ) . |
| 973 | $rollback . |
| 974 | $this->getUserMetaData( $newRevRecord->getUser() ) . |
| 975 | '</div>' . |
| 976 | '<div id="mw-diff-ntitle3">' . $newminor . $newRevComment . $rdel . '</div>' . |
| 977 | '<div id="mw-diff-ntitle5">' . $newChangeTags[0] . '</div>' . |
| 978 | '<div id="mw-diff-ntitle4">' . $nextlink . $this->markPatrolledLink() . '</div>'; |
| 979 | |
| 980 | // Allow extensions to change the $newHeader variable |
| 981 | $this->hookRunner->onDifferenceEngineNewHeader( $this, $newHeader, |
| 982 | $formattedRevisionTools, $nextlink, $rollback, $newminor, $diffOnly, |
| 983 | $rdel, $this->unhide ); |
| 984 | |
| 985 | $out->addHTML( |
| 986 | Html::rawElement( 'div', [ |
| 987 | 'class' => 'mw-diff-revision-history-links' |
| 988 | ], $breadCrumbs ) |
| 989 | ); |
| 990 | # If the diff cannot be shown due to a deleted revision, then output |
| 991 | # the diff header and links to unhide (if available)... |
| 992 | if ( $this->shouldBeHiddenFromUser( $this->getAuthority() ) ) { |
| 993 | $this->showDiffStyle(); |
| 994 | $multi = $this->getMultiNotice(); |
| 995 | $out->addHTML( $this->addHeader( '', $oldHeader, $newHeader, $multi ) ); |
| 996 | if ( !$allowed ) { |
| 997 | # Give explanation for why revision is not visible |
| 998 | $msg = [ $suppressed ? 'rev-suppressed-no-diff' : 'rev-deleted-no-diff' ]; |
| 999 | } else { |
| 1000 | # Give explanation and add a link to view the diff... |
| 1001 | $query = $this->getRequest()->appendQueryValue( 'unhide', '1' ); |
| 1002 | $msg = [ |
| 1003 | $suppressed ? 'rev-suppressed-unhide-diff' : 'rev-deleted-unhide-diff', |
| 1004 | $this->getTitle()->getFullURL( $query ) |
| 1005 | ]; |
| 1006 | } |
| 1007 | $out->addHTML( Html::warningBox( $this->msg( ...$msg )->parse(), 'plainlinks' ) ); |
| 1008 | # Otherwise, output a regular diff... |
| 1009 | } else { |
| 1010 | # Add deletion notice if the user is viewing deleted content |
| 1011 | $notice = ''; |
| 1012 | if ( $deleted ) { |
| 1013 | $msg = $suppressed ? 'rev-suppressed-diff-view' : 'rev-deleted-diff-view'; |
| 1014 | $notice = Html::warningBox( $this->msg( $msg )->parse(), 'plainlinks' ); |
| 1015 | } |
| 1016 | |
| 1017 | # Add an error if the content can't be loaded |
| 1018 | $this->getSlotContents(); |
| 1019 | foreach ( $this->getRevisionLoadErrors() as $msg ) { |
| 1020 | $notice .= Html::warningBox( $msg->parse() ); |
| 1021 | } |
| 1022 | |
| 1023 | // Check if inline switcher will be needed |
| 1024 | if ( $this->getTextDiffer()->hasFormat( 'inline' ) ) { |
| 1025 | $out->enableOOUI(); |
| 1026 | } |
| 1027 | |
| 1028 | $this->showTablePrefixes(); |
| 1029 | $this->showDiff( $oldHeader, $newHeader, $notice ); |
| 1030 | if ( !$diffOnly ) { |
| 1031 | $this->renderNewRevision(); |
| 1032 | } |
| 1033 | |
| 1034 | // Allow extensions to optionally not show the final patrolled link |
| 1035 | if ( $this->hookRunner->onDifferenceEngineRenderRevisionShowFinalPatrolLink() ) { |
| 1036 | # Add redundant patrol link on bottom... |
| 1037 | $out->addHTML( $this->markPatrolledLink() ); |
| 1038 | } |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | /** |
| 1043 | * Add table prefixes |
| 1044 | */ |
| 1045 | private function showTablePrefixes() { |
| 1046 | $parts = []; |
| 1047 | foreach ( $this->getSlotDiffRenderers() as $slotDiffRenderer ) { |
| 1048 | $parts += $slotDiffRenderer->getTablePrefix( $this->getContext(), $this->mNewPage ); |
| 1049 | } |
| 1050 | ksort( $parts ); |
| 1051 | if ( count( array_filter( $parts ) ) > 0 ) { |
| 1052 | $language = $this->getLanguage(); |
| 1053 | $attrs = [ |
| 1054 | 'class' => 'mw-diff-table-prefix', |
| 1055 | 'dir' => $language->getDir(), |
| 1056 | 'lang' => $language->getCode(), |
| 1057 | ]; |
| 1058 | $this->getOutput()->addHTML( |
| 1059 | Html::rawElement( 'div', $attrs, implode( '', $parts ) ) ); |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | /** |
| 1064 | * Build a link to mark a change as patrolled. |
| 1065 | * |
| 1066 | * Returns empty string if there's either no revision to patrol or the user is not allowed to. |
| 1067 | * |
| 1068 | * Side effect: When the patrol link is build, this method will call |
| 1069 | * OutputPage::setPreventClickjacking(true) and load a JS module. |
| 1070 | * |
| 1071 | * @return string HTML or empty string |
| 1072 | */ |
| 1073 | public function markPatrolledLink() { |
| 1074 | if ( $this->mMarkPatrolledLink === null ) { |
| 1075 | $linkInfo = $this->getMarkPatrolledLinkInfo(); |
| 1076 | // If false, there is no patrol link needed/allowed |
| 1077 | if ( !$linkInfo || !$this->mNewPage ) { |
| 1078 | $this->mMarkPatrolledLink = ''; |
| 1079 | } else { |
| 1080 | $patrolLinkClass = 'patrollink'; |
| 1081 | $this->mMarkPatrolledLink = ' <span class="' . $patrolLinkClass . '" data-mw="interface">[' . |
| 1082 | $this->linkRenderer->makeKnownLink( |
| 1083 | $this->mNewPage, |
| 1084 | $this->msg( 'markaspatrolleddiff' )->text(), |
| 1085 | [], |
| 1086 | [ |
| 1087 | 'action' => 'markpatrolled', |
| 1088 | 'rcid' => $linkInfo['rcid'], |
| 1089 | ] |
| 1090 | ) . ']</span>'; |
| 1091 | // Allow extensions to change the markpatrolled link |
| 1092 | $this->hookRunner->onDifferenceEngineMarkPatrolledLink( $this, |
| 1093 | $this->mMarkPatrolledLink, $linkInfo['rcid'] ); |
| 1094 | } |
| 1095 | } |
| 1096 | return $this->mMarkPatrolledLink; |
| 1097 | } |
| 1098 | |
| 1099 | /** |
| 1100 | * Returns an array of meta data needed to build a "mark as patrolled" link and |
| 1101 | * adds a JS module to the output. |
| 1102 | * |
| 1103 | * @return array|false An array of meta data for a patrol link (rcid only) |
| 1104 | * or false if no link is needed |
| 1105 | */ |
| 1106 | protected function getMarkPatrolledLinkInfo() { |
| 1107 | $user = $this->getUser(); |
| 1108 | $config = $this->getConfig(); |
| 1109 | |
| 1110 | // Prepare a change patrol link, if applicable |
| 1111 | if ( |
| 1112 | // Is patrolling enabled and the user allowed to? |
| 1113 | $config->get( MainConfigNames::UseRCPatrol ) && |
| 1114 | $this->mNewPage && |
| 1115 | $this->getAuthority()->probablyCan( 'patrol', $this->mNewPage ) && |
| 1116 | // Only do this if the revision isn't more than 6 hours older |
| 1117 | // than the Max RC age (6h because the RC might not be cleaned out regularly) |
| 1118 | RecentChange::isInRCLifespan( $this->mNewRevisionRecord->getTimestamp(), 21600 ) |
| 1119 | ) { |
| 1120 | // Look for an unpatrolled change corresponding to this diff |
| 1121 | $change = RecentChange::newFromConds( |
| 1122 | [ |
| 1123 | 'rc_this_oldid' => $this->mNewid, |
| 1124 | 'rc_patrolled' => RecentChange::PRC_UNPATROLLED |
| 1125 | ], |
| 1126 | __METHOD__ |
| 1127 | ); |
| 1128 | |
| 1129 | if ( $change && !$change->getPerformerIdentity()->equals( $user ) ) { |
| 1130 | $rcid = $change->getAttribute( 'rc_id' ); |
| 1131 | } else { |
| 1132 | // None found or the page has been created by the current user. |
| 1133 | // If the user could patrol this it already would be patrolled |
| 1134 | $rcid = 0; |
| 1135 | } |
| 1136 | |
| 1137 | // Allow extensions to possibly change the rcid here |
| 1138 | // For example the rcid might be set to zero due to the user |
| 1139 | // being the same as the performer of the change but an extension |
| 1140 | // might still want to show it under certain conditions |
| 1141 | $this->hookRunner->onDifferenceEngineMarkPatrolledRCID( $rcid, $this, $change, $user ); |
| 1142 | |
| 1143 | // Build the link |
| 1144 | if ( $rcid ) { |
| 1145 | $this->getOutput()->setPreventClickjacking( true ); |
| 1146 | if ( $this->getAuthority()->isAllowed( 'writeapi' ) ) { |
| 1147 | $this->getOutput()->addModules( 'mediawiki.misc-authed-curate' ); |
| 1148 | } |
| 1149 | |
| 1150 | return [ 'rcid' => $rcid ]; |
| 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | // No mark as patrolled link applicable |
| 1155 | return false; |
| 1156 | } |
| 1157 | |
| 1158 | /** |
| 1159 | * @param RevisionRecord $revRecord |
| 1160 | * |
| 1161 | * @return string |
| 1162 | */ |
| 1163 | private function revisionDeleteLink( RevisionRecord $revRecord ) { |
| 1164 | $link = Linker::getRevDeleteLink( |
| 1165 | $this->getAuthority(), |
| 1166 | $revRecord, |
| 1167 | $revRecord->getPageAsLinkTarget() |
| 1168 | ); |
| 1169 | if ( $link !== '' ) { |
| 1170 | $link = "\u{00A0}\u{00A0}\u{00A0}" . $link . ' '; |
| 1171 | } |
| 1172 | |
| 1173 | return $link; |
| 1174 | } |
| 1175 | |
| 1176 | /** |
| 1177 | * Show the new revision of the page. |
| 1178 | * |
| 1179 | * @note Not supported after calling setContent(). |
| 1180 | */ |
| 1181 | public function renderNewRevision() { |
| 1182 | if ( $this->isContentOverridden ) { |
| 1183 | // The code below only works with a RevisionRecord object. We could construct a |
| 1184 | // fake RevisionRecord (here or in setContent), but since this does not seem |
| 1185 | // needed at the moment, we'll just fail for now. |
| 1186 | throw new LogicException( |
| 1187 | __METHOD__ |
| 1188 | . ' is not supported after calling setContent(). Use setRevisions() instead.' |
| 1189 | ); |
| 1190 | } |
| 1191 | |
| 1192 | $out = $this->getOutput(); |
| 1193 | $revHeader = $this->getRevisionHeader( $this->mNewRevisionRecord ); |
| 1194 | # Add "current version as of X" title |
| 1195 | $out->addHTML( "<hr class='diff-hr' id='mw-oldid' /> |
| 1196 | <h2 class='diff-currentversion-title'>{$revHeader}</h2>\n" ); |
| 1197 | # Page content may be handled by a hooked call instead... |
| 1198 | if ( $this->hookRunner->onArticleContentOnDiff( $this, $out ) ) { |
| 1199 | $this->loadNewText(); |
| 1200 | if ( !$this->mNewPage ) { |
| 1201 | // New revision is unsaved; bail out. |
| 1202 | // TODO in theory rendering the new revision is a meaningful thing to do |
| 1203 | // even if it's unsaved, but a lot of untangling is required to do it safely. |
| 1204 | return; |
| 1205 | } |
| 1206 | if ( $this->hasNewRevisionLoadError() ) { |
| 1207 | // There was an error loading the new revision |
| 1208 | return; |
| 1209 | } |
| 1210 | |
| 1211 | $out->setRevisionId( $this->mNewid ); |
| 1212 | $out->setRevisionIsCurrent( $this->mNewRevisionRecord->isCurrent() ); |
| 1213 | $out->setRevisionTimestamp( $this->mNewRevisionRecord->getTimestamp() ); |
| 1214 | $out->setArticleFlag( true ); |
| 1215 | |
| 1216 | if ( !$this->hookRunner->onArticleRevisionViewCustom( |
| 1217 | $this->mNewRevisionRecord, $this->mNewPage, $this->mOldid, $out ) |
| 1218 | ) { |
| 1219 | // Handled by extension |
| 1220 | // NOTE: sync with hooks called in Article::view() |
| 1221 | } else { |
| 1222 | // Normal page |
| 1223 | if ( $this->getTitle()->equals( $this->mNewPage ) ) { |
| 1224 | // If the Title stored in the context is the same as the one |
| 1225 | // of the new revision, we can use its associated WikiPage |
| 1226 | // object. |
| 1227 | $wikiPage = $this->getWikiPage(); |
| 1228 | } else { |
| 1229 | // Otherwise we need to create our own WikiPage object |
| 1230 | $wikiPage = $this->wikiPageFactory->newFromTitle( $this->mNewPage ); |
| 1231 | } |
| 1232 | |
| 1233 | $parserOptions = $wikiPage->makeParserOptions( $this->getContext() ); |
| 1234 | $parserOptions->setRenderReason( 'diff-page' ); |
| 1235 | |
| 1236 | $parserOutputAccess = MediaWikiServices::getInstance()->getParserOutputAccess(); |
| 1237 | $status = $parserOutputAccess->getParserOutput( |
| 1238 | $wikiPage, |
| 1239 | $parserOptions, |
| 1240 | $this->mNewRevisionRecord, |
| 1241 | // we already checked |
| 1242 | ParserOutputAccess::OPT_NO_AUDIENCE_CHECK | |
| 1243 | // Update cascading protection |
| 1244 | ParserOutputAccess::OPT_LINKS_UPDATE |
| 1245 | ); |
| 1246 | if ( $status->isOK() ) { |
| 1247 | $parserOutput = $status->getValue(); |
| 1248 | // Allow extensions to change parser output here |
| 1249 | if ( $this->hookRunner->onDifferenceEngineRenderRevisionAddParserOutput( |
| 1250 | $this, $out, $parserOutput, $wikiPage ) |
| 1251 | ) { |
| 1252 | $out->addParserOutput( $parserOutput, [ |
| 1253 | 'enableSectionEditLinks' => $this->mNewRevisionRecord->isCurrent() |
| 1254 | && $this->getAuthority()->probablyCan( |
| 1255 | 'edit', |
| 1256 | $this->mNewRevisionRecord->getPage() |
| 1257 | ), |
| 1258 | 'absoluteURLs' => $this->slotDiffOptions['expand-url'] ?? false |
| 1259 | ] ); |
| 1260 | } |
| 1261 | } else { |
| 1262 | $out->addHTML( |
| 1263 | Html::errorBox( |
| 1264 | $out->parseAsInterface( |
| 1265 | $status->getWikiText( false, false, $this->getLanguage() ) |
| 1266 | ) |
| 1267 | ) |
| 1268 | ); |
| 1269 | } |
| 1270 | } |
| 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | /** |
| 1275 | * Get the diff text, send it to the OutputPage object |
| 1276 | * Returns false if the diff could not be generated, otherwise returns true |
| 1277 | * |
| 1278 | * @param string|false $otitle Header for old text or false |
| 1279 | * @param string|false $ntitle Header for new text or false |
| 1280 | * @param string $notice HTML between diff header and body |
| 1281 | * |
| 1282 | * @return bool |
| 1283 | */ |
| 1284 | public function showDiff( $otitle, $ntitle, $notice = '' ) { |
| 1285 | // Allow extensions to affect the output here |
| 1286 | $this->hookRunner->onDifferenceEngineShowDiff( $this ); |
| 1287 | |
| 1288 | $diff = $this->getDiff( $otitle, $ntitle, $notice ); |
| 1289 | if ( $diff === false ) { |
| 1290 | $this->showMissingRevision(); |
| 1291 | return false; |
| 1292 | } |
| 1293 | |
| 1294 | $this->showDiffStyle(); |
| 1295 | if ( $this->slotDiffOptions['expand-url'] ?? false ) { |
| 1296 | $diff = Linker::expandLocalLinks( $diff ); |
| 1297 | } |
| 1298 | $this->getOutput()->addHTML( $diff ); |
| 1299 | return true; |
| 1300 | } |
| 1301 | |
| 1302 | /** |
| 1303 | * Add style sheets for diff display. |
| 1304 | */ |
| 1305 | public function showDiffStyle() { |
| 1306 | if ( !$this->isSlotDiffRenderer ) { |
| 1307 | $this->getOutput()->addModules( 'mediawiki.diff' ); |
| 1308 | $this->getOutput()->addModuleStyles( [ |
| 1309 | 'mediawiki.interface.helpers.styles', |
| 1310 | 'mediawiki.diff.styles' |
| 1311 | ] ); |
| 1312 | foreach ( $this->getSlotDiffRenderers() as $slotDiffRenderer ) { |
| 1313 | $slotDiffRenderer->addModules( $this->getOutput() ); |
| 1314 | } |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | /** |
| 1319 | * Get complete diff table, including header |
| 1320 | * |
| 1321 | * @param string|false $otitle Header for old text or false |
| 1322 | * @param string|false $ntitle Header for new text or false |
| 1323 | * @param string $notice HTML between diff header and body |
| 1324 | * |
| 1325 | * @return string|false |
| 1326 | */ |
| 1327 | public function getDiff( $otitle, $ntitle, $notice = '' ) { |
| 1328 | $body = $this->getDiffBody(); |
| 1329 | if ( $body === false ) { |
| 1330 | return false; |
| 1331 | } |
| 1332 | |
| 1333 | $multi = $this->getMultiNotice(); |
| 1334 | // Display a message when the diff is empty |
| 1335 | if ( $body === '' ) { |
| 1336 | $notice .= '<div class="mw-diff-empty">' . |
| 1337 | $this->msg( 'diff-empty' )->parse() . |
| 1338 | "</div>\n"; |
| 1339 | } |
| 1340 | |
| 1341 | if ( $this->cacheHitKey !== null ) { |
| 1342 | $body .= "\n<!-- diff cache key " . htmlspecialchars( $this->cacheHitKey ) . " -->\n"; |
| 1343 | } |
| 1344 | |
| 1345 | return $this->addHeader( $body, $otitle, $ntitle, $multi, $notice ); |
| 1346 | } |
| 1347 | |
| 1348 | /** |
| 1349 | * Get the diff table body, without header |
| 1350 | * |
| 1351 | * @return string|false |
| 1352 | */ |
| 1353 | public function getDiffBody() { |
| 1354 | $this->mCacheHit = true; |
| 1355 | // Check if the diff should be hidden from this user |
| 1356 | if ( !$this->isContentOverridden ) { |
| 1357 | if ( !$this->loadRevisionData() ) { |
| 1358 | return false; |
| 1359 | } elseif ( $this->mOldRevisionRecord && |
| 1360 | !$this->mOldRevisionRecord->userCan( |
| 1361 | RevisionRecord::DELETED_TEXT, |
| 1362 | $this->getAuthority() |
| 1363 | ) |
| 1364 | ) { |
| 1365 | return false; |
| 1366 | } elseif ( $this->mNewRevisionRecord && |
| 1367 | !$this->mNewRevisionRecord->userCan( |
| 1368 | RevisionRecord::DELETED_TEXT, |
| 1369 | $this->getAuthority() |
| 1370 | ) ) { |
| 1371 | return false; |
| 1372 | } |
| 1373 | // Short-circuit |
| 1374 | if ( $this->mOldRevisionRecord === false || ( |
| 1375 | $this->mOldRevisionRecord && |
| 1376 | $this->mNewRevisionRecord && |
| 1377 | $this->mOldRevisionRecord->getId() && |
| 1378 | $this->mOldRevisionRecord->getId() == $this->mNewRevisionRecord->getId() |
| 1379 | ) ) { |
| 1380 | if ( $this->hookRunner->onDifferenceEngineShowEmptyOldContent( $this ) ) { |
| 1381 | return ''; |
| 1382 | } |
| 1383 | } |
| 1384 | } |
| 1385 | |
| 1386 | // Cacheable? |
| 1387 | $key = false; |
| 1388 | $services = MediaWikiServices::getInstance(); |
| 1389 | $cache = $services->getMainWANObjectCache(); |
| 1390 | $stats = $services->getStatsdDataFactory(); |
| 1391 | if ( $this->mOldid && $this->mNewid ) { |
| 1392 | $key = $cache->makeKey( ...$this->getDiffBodyCacheKeyParams() ); |
| 1393 | |
| 1394 | // Try cache |
| 1395 | if ( !$this->mRefreshCache ) { |
| 1396 | $difftext = $cache->get( $key ); |
| 1397 | if ( is_string( $difftext ) ) { |
| 1398 | $stats->updateCount( 'diff_cache.hit', 1 ); |
| 1399 | $difftext = $this->localiseDiff( $difftext ); |
| 1400 | $this->cacheHitKey = $key; |
| 1401 | return $difftext; |
| 1402 | } |
| 1403 | } // don't try to load but save the result |
| 1404 | } |
| 1405 | $this->mCacheHit = false; |
| 1406 | $this->cacheHitKey = null; |
| 1407 | |
| 1408 | // Loadtext is permission safe, this just clears out the diff |
| 1409 | if ( !$this->loadText() ) { |
| 1410 | return false; |
| 1411 | } |
| 1412 | |
| 1413 | $difftext = ''; |
| 1414 | // We've checked for revdelete at the beginning of this method; it's OK to ignore |
| 1415 | // read permissions here. |
| 1416 | $slotContents = $this->getSlotContents(); |
| 1417 | foreach ( $this->getSlotDiffRenderers() as $role => $slotDiffRenderer ) { |
| 1418 | try { |
| 1419 | $slotDiff = $slotDiffRenderer->getDiff( $slotContents[$role]['old'], |
| 1420 | $slotContents[$role]['new'] ); |
| 1421 | } catch ( IncompatibleDiffTypesException $e ) { |
| 1422 | $slotDiff = $this->getSlotError( $e->getMessageObject()->parse() ); |
| 1423 | } |
| 1424 | if ( $slotDiff && $role !== SlotRecord::MAIN ) { |
| 1425 | // FIXME: ask SlotRoleHandler::getSlotNameMessage |
| 1426 | $slotTitle = $role; |
| 1427 | $difftext .= $this->getSlotHeader( $slotTitle ); |
| 1428 | } |
| 1429 | $difftext .= $slotDiff; |
| 1430 | } |
| 1431 | |
| 1432 | // Save to cache for 7 days |
| 1433 | if ( !$this->hookRunner->onAbortDiffCache( $this ) ) { |
| 1434 | $stats->updateCount( 'diff_cache.uncacheable', 1 ); |
| 1435 | } elseif ( $key !== false ) { |
| 1436 | $stats->updateCount( 'diff_cache.miss', 1 ); |
| 1437 | $cache->set( $key, $difftext, 7 * 86400 ); |
| 1438 | } else { |
| 1439 | $stats->updateCount( 'diff_cache.uncacheable', 1 ); |
| 1440 | } |
| 1441 | // localise line numbers and title attribute text |
| 1442 | $difftext = $this->localiseDiff( $difftext ); |
| 1443 | |
| 1444 | return $difftext; |
| 1445 | } |
| 1446 | |
| 1447 | /** |
| 1448 | * Get the diff table body for one slot, without header |
| 1449 | * |
| 1450 | * @param string $role |
| 1451 | * @return string|false |
| 1452 | */ |
| 1453 | public function getDiffBodyForRole( $role ) { |
| 1454 | $diffRenderers = $this->getSlotDiffRenderers(); |
| 1455 | if ( !isset( $diffRenderers[$role] ) ) { |
| 1456 | return false; |
| 1457 | } |
| 1458 | |
| 1459 | $slotContents = $this->getSlotContents(); |
| 1460 | try { |
| 1461 | $slotDiff = $diffRenderers[$role]->getDiff( $slotContents[$role]['old'], |
| 1462 | $slotContents[$role]['new'] ); |
| 1463 | } catch ( IncompatibleDiffTypesException $e ) { |
| 1464 | $slotDiff = $this->getSlotError( $e->getMessageObject()->parse() ); |
| 1465 | } |
| 1466 | if ( $slotDiff === '' ) { |
| 1467 | return false; |
| 1468 | } |
| 1469 | |
| 1470 | if ( $role !== SlotRecord::MAIN ) { |
| 1471 | // TODO use human-readable role name at least |
| 1472 | $slotTitle = $role; |
| 1473 | $slotDiff = $this->getSlotHeader( $slotTitle ) . $slotDiff; |
| 1474 | } |
| 1475 | |
| 1476 | return $this->localiseDiff( $slotDiff ); |
| 1477 | } |
| 1478 | |
| 1479 | /** |
| 1480 | * Get a slot header for inclusion in a diff body (as a table row). |
| 1481 | * |
| 1482 | * @param string $headerText The text of the header |
| 1483 | * @return string |
| 1484 | * |
| 1485 | */ |
| 1486 | protected function getSlotHeader( $headerText ) { |
| 1487 | // The old revision is missing on oldid=<first>&diff=prev; only 2 columns in that case. |
| 1488 | $columnCount = $this->mOldRevisionRecord ? 4 : 2; |
| 1489 | $userLang = $this->getLanguage()->getHtmlCode(); |
| 1490 | return Html::rawElement( 'tr', [ 'class' => 'mw-diff-slot-header', 'lang' => $userLang ], |
| 1491 | Html::element( 'th', [ 'colspan' => $columnCount ], $headerText ) ); |
| 1492 | } |
| 1493 | |
| 1494 | /** |
| 1495 | * Get an error message for inclusion in a diff body (as a table row). |
| 1496 | * |
| 1497 | * @param string $errorText The HTML of the error |
| 1498 | * @return string |
| 1499 | */ |
| 1500 | protected function getSlotError( $errorText ) { |
| 1501 | // The old revision is missing on oldid=<first>&diff=prev; only 2 columns in that case. |
| 1502 | $columnCount = $this->mOldRevisionRecord ? 4 : 2; |
| 1503 | $userLang = $this->getLanguage()->getHtmlCode(); |
| 1504 | return Html::rawElement( 'tr', [ 'class' => 'mw-diff-slot-error', 'lang' => $userLang ], |
| 1505 | Html::rawElement( 'td', [ 'colspan' => $columnCount ], $errorText ) ); |
| 1506 | } |
| 1507 | |
| 1508 | /** |
| 1509 | * Get the cache key parameters |
| 1510 | * |
| 1511 | * Subclasses can replace the first element in the array to something |
| 1512 | * more specific to the type of diff (e.g. "inline-diff"), or append |
| 1513 | * if the cache should vary on more things. Overriding entirely should |
| 1514 | * be avoided. |
| 1515 | * |
| 1516 | * @since 1.31 |
| 1517 | * |
| 1518 | * @return string[] |
| 1519 | * @phan-return non-empty-array<string> |
| 1520 | */ |
| 1521 | protected function getDiffBodyCacheKeyParams() { |
| 1522 | if ( !$this->mOldid || !$this->mNewid ) { |
| 1523 | throw new BadMethodCallException( 'mOldid and mNewid must be set to get diff cache key.' ); |
| 1524 | } |
| 1525 | |
| 1526 | $params = [ |
| 1527 | 'diff', |
| 1528 | self::DIFF_VERSION, |
| 1529 | "old-{$this->mOldid}", |
| 1530 | "rev-{$this->mNewid}" |
| 1531 | ]; |
| 1532 | |
| 1533 | $extraKeys = []; |
| 1534 | if ( !$this->isSlotDiffRenderer ) { |
| 1535 | foreach ( $this->getSlotDiffRenderers() as $slotDiffRenderer ) { |
| 1536 | $extraKeys = array_merge( $extraKeys, $slotDiffRenderer->getExtraCacheKeys() ); |
| 1537 | } |
| 1538 | } |
| 1539 | ksort( $extraKeys ); |
| 1540 | return array_merge( $params, array_values( $extraKeys ) ); |
| 1541 | } |
| 1542 | |
| 1543 | /** |
| 1544 | * Implements DifferenceEngineSlotDiffRenderer::getExtraCacheKeys(). Only used when |
| 1545 | * DifferenceEngine is wrapped in DifferenceEngineSlotDiffRenderer. |
| 1546 | * @return string[] |
| 1547 | * @internal for use by DifferenceEngineSlotDiffRenderer only |
| 1548 | * @deprecated |
| 1549 | */ |
| 1550 | public function getExtraCacheKeys() { |
| 1551 | // This method is called when the DifferenceEngine is used for a slot diff. We only care |
| 1552 | // about special things, not the revision IDs, which are added to the cache key by the |
| 1553 | // page-level DifferenceEngine, and which might not have a valid value for this object. |
| 1554 | $this->mOldid = 123456789; |
| 1555 | $this->mNewid = 987654321; |
| 1556 | |
| 1557 | // This will repeat a bunch of unnecessary key fields for each slot. Not nice but harmless. |
| 1558 | $params = $this->getDiffBodyCacheKeyParams(); |
| 1559 | |
| 1560 | // Try to get rid of the standard keys to keep the cache key human-readable: |
| 1561 | // call the getDiffBodyCacheKeyParams implementation of the base class, and if |
| 1562 | // the child class includes the same keys, drop them. |
| 1563 | // Uses an obscure PHP feature where static calls to non-static methods are allowed |
| 1564 | // as long as we are already in a non-static method of the same class, and the call context |
| 1565 | // ($this) will be inherited. |
| 1566 | // phpcs:ignore Squiz.Classes.SelfMemberReference.NotUsed |
| 1567 | $standardParams = DifferenceEngine::getDiffBodyCacheKeyParams(); |
| 1568 | if ( array_slice( $params, 0, count( $standardParams ) ) === $standardParams ) { |
| 1569 | $params = array_slice( $params, count( $standardParams ) ); |
| 1570 | } |
| 1571 | |
| 1572 | return $params; |
| 1573 | } |
| 1574 | |
| 1575 | /** |
| 1576 | * @param array $options for the difference engine. Available options: |
| 1577 | * - diff-type: The text diff format, e.g. "table" or "inline". If the |
| 1578 | * specified format is not supported, the option will be ignored, so |
| 1579 | * the site default format (table) will be used. |
| 1580 | * - expand-url: If true, put full URLs in href attributes (for action=render) |
| 1581 | * FIXME: expand-url is not a slot diff option, it is a DifferenceEngine option. |
| 1582 | * - inline-toggle: If true, and the inline format is supported |
| 1583 | * a format selector toggle switch will be shown. |
| 1584 | */ |
| 1585 | public function setSlotDiffOptions( $options ) { |
| 1586 | $validatedOptions = []; |
| 1587 | if ( isset( $options['diff-type'] ) |
| 1588 | && $this->getTextDiffer()->hasFormat( $options['diff-type'] ) |
| 1589 | ) { |
| 1590 | $validatedOptions['diff-type'] = $options['diff-type']; |
| 1591 | } |
| 1592 | if ( !empty( $options['expand-url'] ) ) { |
| 1593 | $validatedOptions['expand-url'] = true; |
| 1594 | } |
| 1595 | if ( !empty( $options['inline-toggle'] ) ) { |
| 1596 | $validatedOptions['inline-toggle'] = true; |
| 1597 | } |
| 1598 | $this->slotDiffOptions = $validatedOptions; |
| 1599 | } |
| 1600 | |
| 1601 | /** |
| 1602 | * Set query parameters to append to diff page links |
| 1603 | * |
| 1604 | * @since 1.41 |
| 1605 | * |
| 1606 | * @param array $params |
| 1607 | */ |
| 1608 | public function setExtraQueryParams( $params ) { |
| 1609 | $this->extraQueryParams = $params; |
| 1610 | } |
| 1611 | |
| 1612 | /** |
| 1613 | * Generate a diff, no caching. |
| 1614 | * |
| 1615 | * @since 1.21 |
| 1616 | * |
| 1617 | * @param Content $old Old content |
| 1618 | * @param Content $new New content |
| 1619 | * |
| 1620 | * @throws Exception If old or new content is not an instance of TextContent. |
| 1621 | * @return bool|string |
| 1622 | * |
| 1623 | * @deprecated since 1.32, use a SlotDiffRenderer instead. |
| 1624 | */ |
| 1625 | public function generateContentDiffBody( Content $old, Content $new ) { |
| 1626 | $slotDiffRenderer = $new->getContentHandler()->getSlotDiffRenderer( $this->getContext() ); |
| 1627 | if ( |
| 1628 | $slotDiffRenderer instanceof DifferenceEngineSlotDiffRenderer |
| 1629 | && $this->isSlotDiffRenderer |
| 1630 | ) { |
| 1631 | // Oops, we are just about to enter an infinite loop (the slot-level DifferenceEngine |
| 1632 | // called a DifferenceEngineSlotDiffRenderer that wraps the same DifferenceEngine class). |
| 1633 | // This will happen when a content model has no custom slot diff renderer, it does have |
| 1634 | // a custom difference engine, but that does not override this method. |
| 1635 | throw new LogicException( get_class( $this ) . ': could not maintain backwards compatibility. ' |
| 1636 | . 'Please use a SlotDiffRenderer.' ); |
| 1637 | } |
| 1638 | return $slotDiffRenderer->getDiff( $old, $new ) . $this->getDebugString(); |
| 1639 | } |
| 1640 | |
| 1641 | /** |
| 1642 | * Generate a diff, no caching |
| 1643 | * |
| 1644 | * @param string $otext Old text, must be already segmented |
| 1645 | * @param string $ntext New text, must be already segmented |
| 1646 | * |
| 1647 | * @throws LogicException If content handling for text content is configured in a way |
| 1648 | * that makes maintaining B/C hard. |
| 1649 | * @return bool|string |
| 1650 | * |
| 1651 | * @deprecated since 1.32, use a TextSlotDiffRenderer instead. |
| 1652 | */ |
| 1653 | public function generateTextDiffBody( $otext, $ntext ) { |
| 1654 | $slotDiffRenderer = $this->contentHandlerFactory |
| 1655 | ->getContentHandler( CONTENT_MODEL_TEXT ) |
| 1656 | ->getSlotDiffRenderer( $this->getContext() ); |
| 1657 | if ( !( $slotDiffRenderer instanceof TextSlotDiffRenderer ) ) { |
| 1658 | // Someone used the GetSlotDiffRenderer hook to replace the renderer. |
| 1659 | // This is too unlikely to happen to bother handling properly. |
| 1660 | throw new LogicException( 'The slot diff renderer for text content should be a ' |
| 1661 | . 'TextSlotDiffRenderer subclass' ); |
| 1662 | } |
| 1663 | return $slotDiffRenderer->getTextDiff( $otext, $ntext ) . $this->getDebugString(); |
| 1664 | } |
| 1665 | |
| 1666 | /** |
| 1667 | * Process DiffEngine config and get a sensible, usable engine |
| 1668 | * |
| 1669 | * @return string 'wikidiff2', 'php', or path to an executable |
| 1670 | * @internal For use by this class and within Core only. |
| 1671 | */ |
| 1672 | public static function getEngine() { |
| 1673 | $differenceEngine = new self; |
| 1674 | $engine = $differenceEngine->getTextDiffer()->getEngineForFormat( 'table' ); |
| 1675 | if ( $engine === 'external' ) { |
| 1676 | return MediaWikiServices::getInstance()->getMainConfig() |
| 1677 | ->get( MainConfigNames::ExternalDiffEngine ); |
| 1678 | } else { |
| 1679 | return $engine; |
| 1680 | } |
| 1681 | } |
| 1682 | |
| 1683 | /** |
| 1684 | * Generate a debug comment indicating diff generating time, |
| 1685 | * server node, and generator backend. |
| 1686 | * |
| 1687 | * @param string $generator What diff engine was used |
| 1688 | * |
| 1689 | * @return string |
| 1690 | */ |
| 1691 | protected function debug( $generator = "internal" ) { |
| 1692 | if ( !$this->enableDebugComment ) { |
| 1693 | return ''; |
| 1694 | } |
| 1695 | $data = [ $generator ]; |
| 1696 | if ( $this->getConfig()->get( MainConfigNames::ShowHostnames ) ) { |
| 1697 | $data[] = wfHostname(); |
| 1698 | } |
| 1699 | $data[] = wfTimestamp( TS_DB ); |
| 1700 | |
| 1701 | return "<!-- diff generator: " . |
| 1702 | implode( " ", array_map( "htmlspecialchars", $data ) ) . |
| 1703 | " -->\n"; |
| 1704 | } |
| 1705 | |
| 1706 | /** |
| 1707 | * @return string |
| 1708 | */ |
| 1709 | private function getDebugString() { |
| 1710 | $engine = self::getEngine(); |
| 1711 | if ( $engine === 'wikidiff2' ) { |
| 1712 | return $this->debug( 'wikidiff2' ); |
| 1713 | } elseif ( $engine === 'php' ) { |
| 1714 | return $this->debug( 'native PHP' ); |
| 1715 | } else { |
| 1716 | return $this->debug( "external $engine" ); |
| 1717 | } |
| 1718 | } |
| 1719 | |
| 1720 | /** |
| 1721 | * Localise diff output |
| 1722 | * |
| 1723 | * @param string $text |
| 1724 | * @return string |
| 1725 | */ |
| 1726 | private function localiseDiff( $text ) { |
| 1727 | return $this->getTextDiffer()->localize( $this->getTextDiffFormat(), $text ); |
| 1728 | } |
| 1729 | |
| 1730 | /** |
| 1731 | * Replace a common convention for language-independent line numbers with |
| 1732 | * the text in the user's language. |
| 1733 | * |
| 1734 | * @deprecated since 1.41, use BaseTextDiffer::localizeLineNumbers() |
| 1735 | * @param string $text |
| 1736 | * @return string |
| 1737 | */ |
| 1738 | public function localiseLineNumbers( $text ) { |
| 1739 | return preg_replace_callback( '/<!--LINE (\d+)-->/', |
| 1740 | function ( array $matches ) { |
| 1741 | if ( $matches[1] === '1' && $this->mReducedLineNumbers ) { |
| 1742 | return ''; |
| 1743 | } |
| 1744 | return $this->msg( 'lineno' )->numParams( $matches[1] )->escaped(); |
| 1745 | }, $text ); |
| 1746 | } |
| 1747 | |
| 1748 | /** |
| 1749 | * If there are revisions between the ones being compared, return a note saying so. |
| 1750 | * |
| 1751 | * @return string |
| 1752 | */ |
| 1753 | public function getMultiNotice() { |
| 1754 | // The notice only make sense if we are diffing two saved revisions of the same page. |
| 1755 | if ( |
| 1756 | !$this->mOldRevisionRecord || !$this->mNewRevisionRecord |
| 1757 | || !$this->mOldPage || !$this->mNewPage |
| 1758 | || !$this->mOldPage->equals( $this->mNewPage ) |
| 1759 | || $this->mOldRevisionRecord->getId() === null |
| 1760 | || $this->mNewRevisionRecord->getId() === null |
| 1761 | // (T237709) Deleted revs might have different page IDs |
| 1762 | || $this->mNewPage->getArticleID() !== $this->mOldRevisionRecord->getPageId() |
| 1763 | || $this->mNewPage->getArticleID() !== $this->mNewRevisionRecord->getPageId() |
| 1764 | ) { |
| 1765 | return ''; |
| 1766 | } |
| 1767 | |
| 1768 | if ( $this->mOldRevisionRecord->getTimestamp() > $this->mNewRevisionRecord->getTimestamp() ) { |
| 1769 | $oldRevRecord = $this->mNewRevisionRecord; // flip |
| 1770 | $newRevRecord = $this->mOldRevisionRecord; // flip |
| 1771 | } else { // normal case |
| 1772 | $oldRevRecord = $this->mOldRevisionRecord; |
| 1773 | $newRevRecord = $this->mNewRevisionRecord; |
| 1774 | } |
| 1775 | |
| 1776 | // Don't show the notice if too many rows must be scanned |
| 1777 | // @todo show some special message for that case |
| 1778 | $nEdits = 0; |
| 1779 | $revisionIdList = $this->revisionStore->getRevisionIdsBetween( |
| 1780 | $this->mNewPage->getArticleID(), |
| 1781 | $oldRevRecord, |
| 1782 | $newRevRecord, |
| 1783 | 1000 |
| 1784 | ); |
| 1785 | // only count revisions that are visible |
| 1786 | if ( count( $revisionIdList ) > 0 ) { |
| 1787 | foreach ( $revisionIdList as $revisionId ) { |
| 1788 | $revision = $this->revisionStore->getRevisionById( $revisionId ); |
| 1789 | if ( $revision->getUser( RevisionRecord::FOR_THIS_USER, $this->getAuthority() ) ) { |
| 1790 | $nEdits++; |
| 1791 | } |
| 1792 | } |
| 1793 | } |
| 1794 | if ( $nEdits > 0 && $nEdits <= 1000 ) { |
| 1795 | // Use an invalid username to get the wiki's default gender (as fallback) |
| 1796 | $newRevUserForGender = '[HIDDEN]'; |
| 1797 | $limit = 100; // use diff-multi-manyusers if too many users |
| 1798 | try { |
| 1799 | $users = $this->revisionStore->getAuthorsBetween( |
| 1800 | $this->mNewPage->getArticleID(), |
| 1801 | $oldRevRecord, |
| 1802 | $newRevRecord, |
| 1803 | null, |
| 1804 | $limit |
| 1805 | ); |
| 1806 | $numUsers = count( $users ); |
| 1807 | |
| 1808 | $newRevUser = $newRevRecord->getUser( RevisionRecord::RAW ); |
| 1809 | $newRevUserText = $newRevUser ? $newRevUser->getName() : ''; |
| 1810 | $newRevUserSafe = $newRevRecord->getUser( |
| 1811 | RevisionRecord::FOR_THIS_USER, |
| 1812 | $this->getAuthority() |
| 1813 | ); |
| 1814 | $newRevUserForGender = $newRevUserSafe ? $newRevUserSafe->getName() : '[HIDDEN]'; |
| 1815 | if ( $numUsers == 1 && $users[0]->getName() == $newRevUserText ) { |
| 1816 | $numUsers = 0; // special case to say "by the same user" instead of "by one other user" |
| 1817 | } |
| 1818 | } catch ( InvalidArgumentException $e ) { |
| 1819 | $numUsers = 0; |
| 1820 | } |
| 1821 | |
| 1822 | return self::intermediateEditsMsg( $nEdits, $numUsers, $limit, $newRevUserForGender ); |
| 1823 | } |
| 1824 | |
| 1825 | return ''; |
| 1826 | } |
| 1827 | |
| 1828 | /** |
| 1829 | * Get a notice about how many intermediate edits and users there are |
| 1830 | * |
| 1831 | * @param int $numEdits |
| 1832 | * @param int $numUsers |
| 1833 | * @param int $limit |
| 1834 | * @param string $lastUser |
| 1835 | * |
| 1836 | * @return string |
| 1837 | */ |
| 1838 | public static function intermediateEditsMsg( $numEdits, $numUsers, $limit, $lastUser = '[HIDDEN]' ) { |
| 1839 | if ( $numUsers === 0 ) { |
| 1840 | $msg = 'diff-multi-sameuser'; |
| 1841 | return wfMessage( $msg ) |
| 1842 | ->numParams( $numEdits, $numUsers ) |
| 1843 | ->params( $lastUser ) |
| 1844 | ->parse(); |
| 1845 | } elseif ( $numUsers > $limit ) { |
| 1846 | $msg = 'diff-multi-manyusers'; |
| 1847 | $numUsers = $limit; |
| 1848 | } else { |
| 1849 | $msg = 'diff-multi-otherusers'; |
| 1850 | } |
| 1851 | |
| 1852 | return wfMessage( $msg )->numParams( $numEdits, $numUsers )->parse(); |
| 1853 | } |
| 1854 | |
| 1855 | /** |
| 1856 | * @param RevisionRecord $revRecord |
| 1857 | * @return bool whether the user can see and edit the revision. |
| 1858 | */ |
| 1859 | private function userCanEdit( RevisionRecord $revRecord ) { |
| 1860 | if ( !$revRecord->userCan( RevisionRecord::DELETED_TEXT, $this->getAuthority() ) ) { |
| 1861 | return false; |
| 1862 | } |
| 1863 | |
| 1864 | return true; |
| 1865 | } |
| 1866 | |
| 1867 | /** |
| 1868 | * Get a header for a specified revision. |
| 1869 | * |
| 1870 | * @param RevisionRecord $rev |
| 1871 | * @param string $complete 'complete' to get the header wrapped depending |
| 1872 | * the visibility of the revision and a link to edit the page. |
| 1873 | * |
| 1874 | * @return string HTML fragment |
| 1875 | */ |
| 1876 | public function getRevisionHeader( RevisionRecord $rev, $complete = '' ) { |
| 1877 | $lang = $this->getLanguage(); |
| 1878 | $user = $this->getUser(); |
| 1879 | $revtimestamp = $rev->getTimestamp(); |
| 1880 | $timestamp = $lang->userTimeAndDate( $revtimestamp, $user ); |
| 1881 | $dateofrev = $lang->userDate( $revtimestamp, $user ); |
| 1882 | $timeofrev = $lang->userTime( $revtimestamp, $user ); |
| 1883 | |
| 1884 | $header = $this->msg( |
| 1885 | $rev->isCurrent() ? 'currentrev-asof' : 'revisionasof', |
| 1886 | $timestamp, |
| 1887 | $dateofrev, |
| 1888 | $timeofrev |
| 1889 | ); |
| 1890 | |
| 1891 | if ( $complete !== 'complete' ) { |
| 1892 | return $header->escaped(); |
| 1893 | } |
| 1894 | |
| 1895 | $title = $rev->getPageAsLinkTarget(); |
| 1896 | |
| 1897 | if ( $this->userCanEdit( $rev ) ) { |
| 1898 | $header = $this->linkRenderer->makeKnownLink( |
| 1899 | $title, |
| 1900 | $header->text(), |
| 1901 | [], |
| 1902 | [ 'oldid' => $rev->getId() ] |
| 1903 | ); |
| 1904 | $editQuery = [ 'action' => 'edit' ]; |
| 1905 | if ( !$rev->isCurrent() ) { |
| 1906 | $editQuery['oldid'] = $rev->getId(); |
| 1907 | } |
| 1908 | |
| 1909 | $key = $this->getAuthority()->probablyCan( 'edit', $rev->getPage() ) ? 'editold' : 'viewsourceold'; |
| 1910 | $msg = $this->msg( $key )->text(); |
| 1911 | $editLink = $this->linkRenderer->makeKnownLink( $title, $msg, [], $editQuery ); |
| 1912 | $header .= ' ' . Html::rawElement( |
| 1913 | 'span', |
| 1914 | [ 'class' => 'mw-diff-edit' ], |
| 1915 | $editLink |
| 1916 | ); |
| 1917 | } else { |
| 1918 | $header = $header->escaped(); |
| 1919 | } |
| 1920 | |
| 1921 | // Machine readable information |
| 1922 | $header .= Html::element( 'span', |
| 1923 | [ |
| 1924 | 'class' => 'mw-diff-timestamp', |
| 1925 | 'data-timestamp' => wfTimestamp( TS_ISO_8601, $revtimestamp ), |
| 1926 | ], '' |
| 1927 | ); |
| 1928 | |
| 1929 | if ( $rev->isDeleted( RevisionRecord::DELETED_TEXT ) ) { |
| 1930 | return Html::rawElement( |
| 1931 | 'span', |
| 1932 | [ 'class' => Linker::getRevisionDeletedClass( $rev ) ], |
| 1933 | $header |
| 1934 | ); |
| 1935 | } |
| 1936 | |
| 1937 | return $header; |
| 1938 | } |
| 1939 | |
| 1940 | /** |
| 1941 | * Add the header to a diff body |
| 1942 | * |
| 1943 | * @param string $diff Diff body |
| 1944 | * @param string $otitle Old revision header |
| 1945 | * @param string $ntitle New revision header |
| 1946 | * @param string $multi Notice telling user that there are intermediate |
| 1947 | * revisions between the ones being compared |
| 1948 | * @param string $notice Other notices, e.g. that user is viewing deleted content |
| 1949 | * |
| 1950 | * @return string |
| 1951 | */ |
| 1952 | public function addHeader( $diff, $otitle, $ntitle, $multi = '', $notice = '' ) { |
| 1953 | // shared.css sets diff in interface language/dir, but the actual content |
| 1954 | // is often in a different language, mostly the page content language/dir |
| 1955 | $header = Html::openElement( 'table', [ |
| 1956 | 'class' => [ |
| 1957 | 'diff', |
| 1958 | // The following classes are used here: |
| 1959 | // * diff-type-table |
| 1960 | // * diff-type-inline |
| 1961 | 'diff-type-' . $this->getTextDiffFormat(), |
| 1962 | // The following classes are used here: |
| 1963 | // * diff-contentalign-left |
| 1964 | // * diff-contentalign-right |
| 1965 | 'diff-contentalign-' . $this->getDiffLang()->alignStart(), |
| 1966 | // The following classes are used here: |
| 1967 | // * diff-editfont-monospace |
| 1968 | // * diff-editfont-sans-serif |
| 1969 | // * diff-editfont-serif |
| 1970 | 'diff-editfont-' . $this->userOptionsLookup->getOption( |
| 1971 | $this->getUser(), |
| 1972 | 'editfont' |
| 1973 | ) |
| 1974 | ], |
| 1975 | 'data-mw' => 'interface', |
| 1976 | ] ); |
| 1977 | $userLang = htmlspecialchars( $this->getLanguage()->getHtmlCode() ); |
| 1978 | |
| 1979 | if ( !$diff && !$otitle ) { |
| 1980 | $header .= " |
| 1981 | <tr class=\"diff-title\" lang=\"{$userLang}\"> |
| 1982 | <td class=\"diff-ntitle\">{$ntitle}</td> |
| 1983 | </tr>"; |
| 1984 | $multiColspan = 1; |
| 1985 | } else { |
| 1986 | if ( $diff ) { // Safari/Chrome show broken output if cols not used |
| 1987 | $header .= " |
| 1988 | <col class=\"diff-marker\" /> |
| 1989 | <col class=\"diff-content\" /> |
| 1990 | <col class=\"diff-marker\" /> |
| 1991 | <col class=\"diff-content\" />"; |
| 1992 | $colspan = 2; |
| 1993 | $multiColspan = 4; |
| 1994 | } else { |
| 1995 | $colspan = 1; |
| 1996 | $multiColspan = 2; |
| 1997 | } |
| 1998 | if ( $otitle || $ntitle ) { |
| 1999 | // FIXME Hardcoding values from TableDiffFormatter. |
| 2000 | $deletedClass = 'diff-side-deleted'; |
| 2001 | $addedClass = 'diff-side-added'; |
| 2002 | $header .= " |
| 2003 | <tr class=\"diff-title\" lang=\"{$userLang}\"> |
| 2004 | <td colspan=\"$colspan\" class=\"diff-otitle {$deletedClass}\">{$otitle}</td> |
| 2005 | <td colspan=\"$colspan\" class=\"diff-ntitle {$addedClass}\">{$ntitle}</td> |
| 2006 | </tr>"; |
| 2007 | } |
| 2008 | } |
| 2009 | |
| 2010 | if ( $multi != '' ) { |
| 2011 | $header .= "<tr><td colspan=\"{$multiColspan}\" " . |
| 2012 | "class=\"diff-multi\" lang=\"{$userLang}\">{$multi}</td></tr>"; |
| 2013 | } |
| 2014 | if ( $notice != '' ) { |
| 2015 | $header .= "<tr><td colspan=\"{$multiColspan}\" " . |
| 2016 | "class=\"diff-notice\" lang=\"{$userLang}\">{$notice}</td></tr>"; |
| 2017 | } |
| 2018 | |
| 2019 | return $header . $diff . "</table>"; |
| 2020 | } |
| 2021 | |
| 2022 | /** |
| 2023 | * Use specified text instead of loading from the database |
| 2024 | * @param Content $oldContent |
| 2025 | * @param Content $newContent |
| 2026 | * @since 1.21 |
| 2027 | * @deprecated since 1.32, use setRevisions or ContentHandler::getSlotDiffRenderer. |
| 2028 | */ |
| 2029 | public function setContent( Content $oldContent, Content $newContent ) { |
| 2030 | $this->mOldContent = $oldContent; |
| 2031 | $this->mNewContent = $newContent; |
| 2032 | |
| 2033 | $this->mTextLoaded = 2; |
| 2034 | $this->mRevisionsLoaded = true; |
| 2035 | $this->isContentOverridden = true; |
| 2036 | $this->slotDiffRenderers = null; |
| 2037 | } |
| 2038 | |
| 2039 | /** |
| 2040 | * Use specified text instead of loading from the database. |
| 2041 | * @param RevisionRecord|null $oldRevision |
| 2042 | * @param RevisionRecord $newRevision |
| 2043 | */ |
| 2044 | public function setRevisions( |
| 2045 | ?RevisionRecord $oldRevision, RevisionRecord $newRevision |
| 2046 | ) { |
| 2047 | if ( $oldRevision ) { |
| 2048 | $this->mOldRevisionRecord = $oldRevision; |
| 2049 | $this->mOldid = $oldRevision->getId(); |
| 2050 | $this->mOldPage = Title::newFromLinkTarget( $oldRevision->getPageAsLinkTarget() ); |
| 2051 | // This method is meant for edit diffs and such so there is no reason to provide a |
| 2052 | // revision that's not readable to the user, but check it just in case. |
| 2053 | $this->mOldContent = $oldRevision->getContent( SlotRecord::MAIN, |
| 2054 | RevisionRecord::FOR_THIS_USER, $this->getAuthority() ); |
| 2055 | if ( !$this->mOldContent ) { |
| 2056 | $this->addRevisionLoadError( 'old' ); |
| 2057 | } |
| 2058 | } else { |
| 2059 | $this->mOldPage = null; |
| 2060 | $this->mOldRevisionRecord = $this->mOldid = false; |
| 2061 | } |
| 2062 | $this->mNewRevisionRecord = $newRevision; |
| 2063 | $this->mNewid = $newRevision->getId(); |
| 2064 | $this->mNewPage = Title::newFromLinkTarget( $newRevision->getPageAsLinkTarget() ); |
| 2065 | $this->mNewContent = $newRevision->getContent( SlotRecord::MAIN, |
| 2066 | RevisionRecord::FOR_THIS_USER, $this->getAuthority() ); |
| 2067 | if ( !$this->mNewContent ) { |
| 2068 | $this->addRevisionLoadError( 'new' ); |
| 2069 | } |
| 2070 | |
| 2071 | $this->mRevisionsIdsLoaded = $this->mRevisionsLoaded = true; |
| 2072 | $this->mTextLoaded = $oldRevision ? 2 : 1; |
| 2073 | $this->isContentOverridden = false; |
| 2074 | $this->slotDiffRenderers = null; |
| 2075 | } |
| 2076 | |
| 2077 | /** |
| 2078 | * Set the language in which the diff text is written |
| 2079 | * |
| 2080 | * @param Language $lang |
| 2081 | * @since 1.19 |
| 2082 | */ |
| 2083 | public function setTextLanguage( Language $lang ) { |
| 2084 | $this->mDiffLang = $lang; |
| 2085 | } |
| 2086 | |
| 2087 | /** |
| 2088 | * Maps a revision pair definition as accepted by DifferenceEngine constructor |
| 2089 | * to a pair of actual integers representing revision ids. |
| 2090 | * |
| 2091 | * @param int $old Revision id, e.g. from URL parameter 'oldid' |
| 2092 | * @param int|string $new Revision id or strings 'next' or 'prev', e.g. from URL parameter 'diff' |
| 2093 | * |
| 2094 | * @return array List of two revision ids, older first, later second. |
| 2095 | * Zero signifies invalid argument passed. |
| 2096 | * false signifies that there is no previous/next revision ($old is the oldest/newest one). |
| 2097 | * @phan-return (int|false)[] |
| 2098 | */ |
| 2099 | public function mapDiffPrevNext( $old, $new ) { |
| 2100 | if ( $new === 'prev' ) { |
| 2101 | // Show diff between revision $old and the previous one. Get previous one from DB. |
| 2102 | $newid = intval( $old ); |
| 2103 | $oldid = false; |
| 2104 | $newRev = $this->revisionStore->getRevisionById( $newid ); |
| 2105 | if ( $newRev ) { |
| 2106 | $oldRev = $this->revisionStore->getPreviousRevision( $newRev ); |
| 2107 | if ( $oldRev ) { |
| 2108 | $oldid = $oldRev->getId(); |
| 2109 | } |
| 2110 | } |
| 2111 | } elseif ( $new === 'next' ) { |
| 2112 | // Show diff between revision $old and the next one. Get next one from DB. |
| 2113 | $oldid = intval( $old ); |
| 2114 | $newid = false; |
| 2115 | $oldRev = $this->revisionStore->getRevisionById( $oldid ); |
| 2116 | if ( $oldRev ) { |
| 2117 | $newRev = $this->revisionStore->getNextRevision( $oldRev ); |
| 2118 | if ( $newRev ) { |
| 2119 | $newid = $newRev->getId(); |
| 2120 | } |
| 2121 | } |
| 2122 | } else { |
| 2123 | $oldid = intval( $old ); |
| 2124 | $newid = intval( $new ); |
| 2125 | } |
| 2126 | |
| 2127 | // @phan-suppress-next-line PhanTypeMismatchReturn getId does not return null here |
| 2128 | return [ $oldid, $newid ]; |
| 2129 | } |
| 2130 | |
| 2131 | private function loadRevisionIds() { |
| 2132 | if ( $this->mRevisionsIdsLoaded ) { |
| 2133 | return; |
| 2134 | } |
| 2135 | |
| 2136 | $this->mRevisionsIdsLoaded = true; |
| 2137 | |
| 2138 | $old = $this->mOldid; |
| 2139 | $new = $this->mNewid; |
| 2140 | |
| 2141 | [ $this->mOldid, $this->mNewid ] = self::mapDiffPrevNext( $old, $new ); |
| 2142 | if ( $new === 'next' && $this->mNewid === false ) { |
| 2143 | # if no result, NewId points to the newest old revision. The only newer |
| 2144 | # revision is cur, which is "0". |
| 2145 | $this->mNewid = 0; |
| 2146 | } |
| 2147 | |
| 2148 | $this->hookRunner->onNewDifferenceEngine( |
| 2149 | // @phan-suppress-next-line PhanTypeMismatchArgumentNullable False positive |
| 2150 | $this->getTitle(), $this->mOldid, $this->mNewid, $old, $new ); |
| 2151 | } |
| 2152 | |
| 2153 | /** |
| 2154 | * Load revision metadata for the specified revisions. If newid is 0, then compare |
| 2155 | * the old revision in oldid to the current revision of the current page (as defined |
| 2156 | * by the request context); if oldid is 0, then compare the revision in newid to the |
| 2157 | * immediately previous one. |
| 2158 | * |
| 2159 | * If oldid is false, leave the corresponding RevisionRecord object set to false. This can |
| 2160 | * happen with 'diff=prev' pointing to a non-existent revision, and is also used directly |
| 2161 | * by the API. |
| 2162 | * |
| 2163 | * @return bool Whether both revisions were loaded successfully. Setting mOldRevisionRecord |
| 2164 | * to false counts as successful loading. |
| 2165 | */ |
| 2166 | public function loadRevisionData() { |
| 2167 | if ( $this->mRevisionsLoaded ) { |
| 2168 | return $this->isContentOverridden || |
| 2169 | ( $this->mOldRevisionRecord !== null && $this->mNewRevisionRecord !== null ); |
| 2170 | } |
| 2171 | |
| 2172 | // Whether it succeeds or fails, we don't want to try again |
| 2173 | $this->mRevisionsLoaded = true; |
| 2174 | |
| 2175 | $this->loadRevisionIds(); |
| 2176 | |
| 2177 | // Load the new RevisionRecord object |
| 2178 | if ( $this->mNewid ) { |
| 2179 | $this->mNewRevisionRecord = $this->revisionStore->getRevisionById( $this->mNewid ); |
| 2180 | } else { |
| 2181 | $this->mNewRevisionRecord = $this->revisionStore->getRevisionByTitle( $this->getTitle() ); |
| 2182 | } |
| 2183 | |
| 2184 | if ( !$this->mNewRevisionRecord instanceof RevisionRecord ) { |
| 2185 | return false; |
| 2186 | } |
| 2187 | |
| 2188 | // Update the new revision ID in case it was 0 (makes life easier doing UI stuff) |
| 2189 | $this->mNewid = $this->mNewRevisionRecord->getId(); |
| 2190 | $this->mNewPage = $this->mNewid ? |
| 2191 | Title::newFromLinkTarget( $this->mNewRevisionRecord->getPageAsLinkTarget() ) : |
| 2192 | null; |
| 2193 | |
| 2194 | // Load the old RevisionRecord object |
| 2195 | $this->mOldRevisionRecord = false; |
| 2196 | if ( $this->mOldid ) { |
| 2197 | $this->mOldRevisionRecord = $this->revisionStore->getRevisionById( $this->mOldid ); |
| 2198 | } elseif ( $this->mOldid === 0 ) { |
| 2199 | $revRecord = $this->revisionStore->getPreviousRevision( $this->mNewRevisionRecord ); |
| 2200 | // No previous revision; mark to show as first-version only. |
| 2201 | $this->mOldid = $revRecord ? $revRecord->getId() : false; |
| 2202 | $this->mOldRevisionRecord = $revRecord ?? false; |
| 2203 | } /* elseif ( $this->mOldid === false ) leave mOldRevisionRecord false; */ |
| 2204 | |
| 2205 | if ( $this->mOldRevisionRecord === null ) { |
| 2206 | return false; |
| 2207 | } |
| 2208 | |
| 2209 | if ( $this->mOldRevisionRecord && $this->mOldRevisionRecord->getId() ) { |
| 2210 | $this->mOldPage = Title::newFromLinkTarget( |
| 2211 | $this->mOldRevisionRecord->getPageAsLinkTarget() |
| 2212 | ); |
| 2213 | } else { |
| 2214 | $this->mOldPage = null; |
| 2215 | } |
| 2216 | |
| 2217 | // Load tags information for both revisions |
| 2218 | $dbr = $this->dbProvider->getReplicaDatabase(); |
| 2219 | $changeTagDefStore = MediaWikiServices::getInstance()->getChangeTagDefStore(); |
| 2220 | if ( $this->mOldid !== false ) { |
| 2221 | $tagIds = $dbr->newSelectQueryBuilder() |
| 2222 | ->select( 'ct_tag_id' ) |
| 2223 | ->from( 'change_tag' ) |
| 2224 | ->where( [ 'ct_rev_id' => $this->mOldid ] ) |
| 2225 | ->caller( __METHOD__ )->fetchFieldValues(); |
| 2226 | $tags = []; |
| 2227 | foreach ( $tagIds as $tagId ) { |
| 2228 | try { |
| 2229 | $tags[] = $changeTagDefStore->getName( (int)$tagId ); |
| 2230 | } catch ( NameTableAccessException $exception ) { |
| 2231 | continue; |
| 2232 | } |
| 2233 | } |
| 2234 | $this->mOldTags = implode( ',', $tags ); |
| 2235 | } else { |
| 2236 | $this->mOldTags = false; |
| 2237 | } |
| 2238 | |
| 2239 | $tagIds = $dbr->newSelectQueryBuilder() |
| 2240 | ->select( 'ct_tag_id' ) |
| 2241 | ->from( 'change_tag' ) |
| 2242 | ->where( [ 'ct_rev_id' => $this->mNewid ] ) |
| 2243 | ->caller( __METHOD__ )->fetchFieldValues(); |
| 2244 | $tags = []; |
| 2245 | foreach ( $tagIds as $tagId ) { |
| 2246 | try { |
| 2247 | $tags[] = $changeTagDefStore->getName( (int)$tagId ); |
| 2248 | } catch ( NameTableAccessException $exception ) { |
| 2249 | continue; |
| 2250 | } |
| 2251 | } |
| 2252 | $this->mNewTags = implode( ',', $tags ); |
| 2253 | |
| 2254 | return true; |
| 2255 | } |
| 2256 | |
| 2257 | /** |
| 2258 | * Load the text of the revisions, as well as revision data. |
| 2259 | * When the old revision is missing (mOldRev is false), loading mOldContent is not attempted. |
| 2260 | * |
| 2261 | * @return bool Whether the content of both revisions could be loaded successfully. |
| 2262 | * (When mOldRev is false, that still counts as a success.) |
| 2263 | * |
| 2264 | */ |
| 2265 | public function loadText() { |
| 2266 | if ( $this->mTextLoaded == 2 ) { |
| 2267 | return $this->loadRevisionData() && |
| 2268 | ( $this->mOldRevisionRecord === false || $this->mOldContent ) |
| 2269 | && $this->mNewContent; |
| 2270 | } |
| 2271 | |
| 2272 | // Whether it succeeds or fails, we don't want to try again |
| 2273 | $this->mTextLoaded = 2; |
| 2274 | |
| 2275 | if ( !$this->loadRevisionData() ) { |
| 2276 | return false; |
| 2277 | } |
| 2278 | |
| 2279 | if ( $this->mOldRevisionRecord ) { |
| 2280 | $this->mOldContent = $this->mOldRevisionRecord->getContent( |
| 2281 | SlotRecord::MAIN, |
| 2282 | RevisionRecord::FOR_THIS_USER, |
| 2283 | $this->getAuthority() |
| 2284 | ); |
| 2285 | if ( $this->mOldContent === null ) { |
| 2286 | return false; |
| 2287 | } |
| 2288 | } |
| 2289 | |
| 2290 | $this->mNewContent = $this->mNewRevisionRecord->getContent( |
| 2291 | SlotRecord::MAIN, |
| 2292 | RevisionRecord::FOR_THIS_USER, |
| 2293 | $this->getAuthority() |
| 2294 | ); |
| 2295 | $this->hookRunner->onDifferenceEngineLoadTextAfterNewContentIsLoaded( $this ); |
| 2296 | if ( $this->mNewContent === null ) { |
| 2297 | return false; |
| 2298 | } |
| 2299 | |
| 2300 | return true; |
| 2301 | } |
| 2302 | |
| 2303 | /** |
| 2304 | * Load the text of the new revision, not the old one |
| 2305 | * |
| 2306 | * @return bool Whether the content of the new revision could be loaded successfully. |
| 2307 | */ |
| 2308 | public function loadNewText() { |
| 2309 | if ( $this->mTextLoaded >= 1 ) { |
| 2310 | return $this->loadRevisionData(); |
| 2311 | } |
| 2312 | |
| 2313 | $this->mTextLoaded = 1; |
| 2314 | |
| 2315 | if ( !$this->loadRevisionData() ) { |
| 2316 | return false; |
| 2317 | } |
| 2318 | |
| 2319 | $this->mNewContent = $this->mNewRevisionRecord->getContent( |
| 2320 | SlotRecord::MAIN, |
| 2321 | RevisionRecord::FOR_THIS_USER, |
| 2322 | $this->getAuthority() |
| 2323 | ); |
| 2324 | |
| 2325 | $this->hookRunner->onDifferenceEngineAfterLoadNewText( $this ); |
| 2326 | |
| 2327 | return true; |
| 2328 | } |
| 2329 | |
| 2330 | /** |
| 2331 | * Get the TextDiffer which will be used for rendering text |
| 2332 | * |
| 2333 | * @return ManifoldTextDiffer |
| 2334 | */ |
| 2335 | protected function getTextDiffer() { |
| 2336 | if ( $this->textDiffer === null ) { |
| 2337 | $this->textDiffer = new ManifoldTextDiffer( |
| 2338 | $this->getContext(), |
| 2339 | $this->getDiffLang(), |
| 2340 | $this->getConfig()->get( MainConfigNames::DiffEngine ), |
| 2341 | $this->getConfig()->get( MainConfigNames::ExternalDiffEngine ), |
| 2342 | $this->getConfig()->get( MainConfigNames::Wikidiff2Options ) |
| 2343 | ); |
| 2344 | } |
| 2345 | return $this->textDiffer; |
| 2346 | } |
| 2347 | |
| 2348 | /** |
| 2349 | * Get the list of supported text diff formats |
| 2350 | * |
| 2351 | * @since 1.41 |
| 2352 | * @return array|string[] |
| 2353 | */ |
| 2354 | public function getSupportedFormats() { |
| 2355 | return $this->getTextDiffer()->getFormats(); |
| 2356 | } |
| 2357 | |
| 2358 | /** |
| 2359 | * Get the selected text diff format |
| 2360 | * |
| 2361 | * @since 1.41 |
| 2362 | * @return string |
| 2363 | */ |
| 2364 | public function getTextDiffFormat() { |
| 2365 | return $this->slotDiffOptions['diff-type'] ?? 'table'; |
| 2366 | } |
| 2367 | |
| 2368 | } |