includes/ImagePage.php

   1 <?php
   2 /**
   3  * Special handling for file description pages.
   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  */
  22
  23 /**
  24  * Class for viewing MediaWiki file description pages
  25  *
  26  * @ingroup Media
  27  */
  28 class ImagePage extends Article {
  29
  30         /**
  31          * @var File
  32          */
  33         private $displayImg;
  34         /**
  35          * @var FileRepo
  36          */
  37         private $repo;
  38         private $fileLoaded;
  39
  40         var $mExtraDescription = false;
  41
  42         /**
  43          * @param $title Title
  44          * @return WikiFilePage
  45          */
  46         protected function newPage( Title $title ) {
  47                 // Overload mPage with a file-specific page
  48                 return new WikiFilePage( $title );
  49         }
  50
  51         /**
  52          * Constructor from a page id
  53          * @param $id Int article ID to load
  54          * @return ImagePage|null
  55          */
  56         public static function newFromID( $id ) {
  57                 $t = Title::newFromID( $id );
  58                 # @todo FIXME: Doesn't inherit right
  59                 return $t == null ? null : new self( $t );
  60                 # return $t == null ? null : new static( $t ); // PHP 5.3
  61         }
  62
  63         /**
  64          * @param $file File:
  65          * @return void
  66          */
  67         public function setFile( $file ) {
  68                 $this->mPage->setFile( $file );
  69                 $this->displayImg = $file;
  70                 $this->fileLoaded = true;
  71         }
  72
  73         protected function loadFile() {
  74                 if ( $this->fileLoaded ) {
  75                         return;
  76                 }
  77                 $this->fileLoaded = true;
  78
  79                 $this->displayImg = $img = false;
  80                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  81                 if ( !$img ) { // not set by hook?
  82                         $img = wfFindFile( $this->getTitle() );
  83                         if ( !$img ) {
  84                                 $img = wfLocalFile( $this->getTitle() );
  85                         }
  86                 }
  87                 $this->mPage->setFile( $img );
  88                 if ( !$this->displayImg ) { // not set by hook?
  89                         $this->displayImg = $img;
  90                 }
  91                 $this->repo = $img->getRepo();
  92         }
  93
  94         /**
  95          * Handler for action=render
  96          * Include body text only; none of the image extras
  97          * However, also include the shared description text
  98          * so that cascading ForeignAPIRepo's work.
  99          *
 100          * @note This uses a div with the class "mw-shared-image-desc"
 101          *    as opposed to the id "mw-shared-image-desc" since the text
 102          *    from here may be cascadingly transcluded to other shared
 103          *    repos, and we want all ids to be unique. On normal
 104          *    view, the outermost shared description will still have
 105          *    the id.
 106          *
 107          * This also differs from normal view in that "shareddescriptionfollows"
 108          * message is not shown. I was not sure if it was appropriate to
 109          * add that message here.
 110          */
 111         public function render() {
 112                 $out = $this->getContext()->getOutput();
 113                 $this->loadFile();
 114
 115                 $descText = $this->mPage->getFile()->getDescriptionText();
 116
 117                 $out->setArticleBodyOnly( true );
 118
 119                 if ( !$descText ) {
 120                         // If no description text, just do standard action=render
 121                         parent::view();
 122                 } else {
 123                         if ( $this->mPage->getID() !== 0 ) {
 124                                 // Local description exists. We need to output both
 125                                 parent::view();
 126                                 $out->addHTML( '<div class="mw-shared-image-desc">' . $descText . "</div>\n" );
 127                         } else {
 128                                 // We don't want to output both a "noarticletext" message and the shared
 129                                 // description, so don't call parent::view().
 130                                 $out->addHTML( '<div class="mw-shared-image-desc">' . $descText . "</div>\n" );
 131                                 // Since we did not call parent::view(), have to call some methods it
 132                                 // normally takes care of. (Not that it matters much since skin not displayed)
 133                                 $out->setArticleFlag( true );
 134                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 135                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 136                         }
 137                 }
 138         }
 139
 140         public function view() {
 141                 global $wgShowEXIF;
 142
 143                 $out = $this->getContext()->getOutput();
 144                 $request = $this->getContext()->getRequest();
 145                 $diff = $request->getVal( 'diff' );
 146                 $diffOnly = $request->getBool( 'diffonly', $this->getContext()->getUser()->getOption( 'diffonly' ) );
 147
 148                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
 149                         parent::view();
 150                         return;
 151                 }
 152
 153                 $this->loadFile();
 154
 155                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 156                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
 157                                 // mTitle is the same as the redirect target so ask Article
 158                                 // to perform the redirect for us.
 159                                 $request->setVal( 'diffonly', 'true' );
 160                                 parent::view();
 161                                 return;
 162                         } else {
 163                                 // mTitle is not the same as the redirect target so it is
 164                                 // probably the redirect page itself. Fake the redirect symbol
 165                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 166                                 $out->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 167                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 168                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 169                                 return;
 170                         }
 171                 }
 172
 173                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 174                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 175                         $formattedMetadata = $this->displayImg->formatMetadata();
 176                         $showmeta = $formattedMetadata !== false;
 177                 } else {
 178                         $showmeta = false;
 179                 }
 180
 181                 if ( !$diff && $this->displayImg->exists() ) {
 182                         $out->addHTML( $this->showTOC( $showmeta ) );
 183                 }
 184
 185                 if ( !$diff ) {
 186                         $this->openShowImage();
 187                 }
 188
 189                 # No need to display noarticletext, we use our own message, output in openShowImage()
 190                 if ( $this->mPage->getID() ) {
 191                         # NS_FILE is in the user language, but this section (the actual wikitext)
 192                         # should be in page content language
 193                         $pageLang = $this->getTitle()->getPageViewLanguage();
 194                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 195                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 196                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 197
 198                         parent::view();
 199
 200                         $out->addHTML( Xml::closeElement( 'div' ) );
 201                 } else {
 202                         # Just need to set the right headers
 203                         $out->setArticleFlag( true );
 204                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 205                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 206                 }
 207
 208                 # Show shared description, if needed
 209                 if ( $this->mExtraDescription ) {
 210                         $fol = wfMessage( 'shareddescriptionfollows' );
 211                         if ( !$fol->isDisabled() ) {
 212                                 $out->addWikiText( $fol->plain() );
 213                         }
 214                         $out->addHTML( '<div id="shared-image-desc" class="mw-shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 215                 }
 216
 217                 $this->closeShowImage();
 218                 $this->imageHistory();
 219                 // TODO: Cleanup the following
 220
 221                 $out->addHTML( Xml::element( 'h2',
 222                         array( 'id' => 'filelinks' ),
 223                         wfMessage( 'imagelinks' )->text() ) . "\n" );
 224                 $this->imageDupes();
 225                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 226                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 227                 $this->imageLinks();
 228
 229                 # Allow extensions to add something after the image links
 230                 $html = '';
 231                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 232                 if ( $html ) {
 233                         $out->addHTML( $html );
 234                 }
 235
 236                 if ( $showmeta ) {
 237                         $out->addHTML( Xml::element(
 238                                 'h2',
 239                                 array( 'id' => 'metadata' ),
 240                                 wfMessage( 'metadata' )->text() ) . "\n" );
 241                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 242                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 243                 }
 244
 245                 // Add remote Filepage.css
 246                 if( !$this->repo->isLocal() ) {
 247                         $css = $this->repo->getDescriptionStylesheetUrl();
 248                         if ( $css ) {
 249                                 $out->addStyle( $css );
 250                         }
 251                 }
 252                 // always show the local local Filepage.css, bug 29277
 253                 $out->addModuleStyles( 'filepage' );
 254         }
 255
 256         /**
 257          * @return File
 258          */
 259         public function getDisplayedFile() {
 260                 $this->loadFile();
 261                 return $this->displayImg;
 262         }
 263
 264         /**
 265          * Create the TOC
 266          *
 267          * @param $metadata Boolean: whether or not to show the metadata link
 268          * @return String
 269          */
 270         protected function showTOC( $metadata ) {
 271                 $r = array(
 272                         '<li><a href="#file">' . wfMessage( 'file-anchor-link' )->escaped() . '</a></li>',
 273                         '<li><a href="#filehistory">' . wfMessage( 'filehist' )->escaped() . '</a></li>',
 274                         '<li><a href="#filelinks">' . wfMessage( 'imagelinks' )->escaped() . '</a></li>',
 275                 );
 276                 if ( $metadata ) {
 277                         $r[] = '<li><a href="#metadata">' . wfMessage( 'metadata' )->escaped() . '</a></li>';
 278                 }
 279
 280                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 281
 282                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 283         }
 284
 285         /**
 286          * Make a table with metadata to be shown in the output page.
 287          *
 288          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 289          *
 290          * @param $metadata Array: the array containing the EXIF data
 291          * @return String The metadata table. This is treated as Wikitext (!)
 292          */
 293         protected function makeMetadataTable( $metadata ) {
 294                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 295                 $r .= wfMessage( 'metadata-help' )->plain();
 296                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 297                 foreach ( $metadata as $type => $stuff ) {
 298                         foreach ( $stuff as $v ) {
 299                                 # @todo FIXME: Why is this using escapeId for a class?!
 300                                 $class = Sanitizer::escapeId( $v['id'] );
 301                                 if ( $type == 'collapsed' ) {
 302                                         $class .= ' collapsable';
 303                                 }
 304                                 $r .= "<tr class=\"$class\">\n";
 305                                 $r .= "<th>{$v['name']}</th>\n";
 306                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 307                         }
 308                 }
 309                 $r .= "</table>\n</div>\n";
 310                 return $r;
 311         }
 312
 313         /**
 314          * Overloading Article's getContentObject method.
 315          *
 316          * Omit noarticletext if sharedupload; text will be fetched from the
 317          * shared upload server if possible.
 318          * @return string
 319          */
 320         public function getContentObject() {
 321                 $this->loadFile();
 322                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 323                         return null;
 324                 }
 325                 return parent::getContentObject();
 326         }
 327
 328         protected function openShowImage() {
 329                 global $wgImageLimits, $wgEnableUploads, $wgSend404Code;
 330
 331                 $this->loadFile();
 332                 $out = $this->getContext()->getOutput();
 333                 $user = $this->getContext()->getUser();
 334                 $lang = $this->getContext()->getLanguage();
 335                 $dirmark = $lang->getDirMarkEntity();
 336                 $request = $this->getContext()->getRequest();
 337
 338                 $sizeSel = intval( $user->getOption( 'imagesize' ) );
 339                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 340                         $sizeSel = User::getDefaultOption( 'imagesize' );
 341
 342                         // The user offset might still be incorrect, specially if
 343                         // $wgImageLimits got changed (see bug #8858).
 344                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 345                                 // Default to the first offset in $wgImageLimits
 346                                 $sizeSel = 0;
 347                         }
 348                 }
 349                 $max = $wgImageLimits[$sizeSel];
 350                 $maxWidth = $max[0];
 351                 $maxHeight = $max[1];
 352
 353                 if ( $this->displayImg->exists() ) {
 354                         # image
 355                         $page = $request->getIntOrNull( 'page' );
 356                         if ( is_null( $page ) ) {
 357                                 $params = array();
 358                                 $page = 1;
 359                         } else {
 360                                 $params = array( 'page' => $page );
 361                         }
 362                         $width_orig = $this->displayImg->getWidth( $page );
 363                         $width = $width_orig;
 364                         $height_orig = $this->displayImg->getHeight( $page );
 365                         $height = $height_orig;
 366
 367                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 368
 369                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 370
 371                         if ( $this->displayImg->allowInlineDisplay() ) {
 372                                 # image
 373
 374                                 # "Download high res version" link below the image
 375                                 # $msgsize = wfMessage( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 376                                 # We'll show a thumbnail of this image
 377                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 378                                         # Calculate the thumbnail size.
 379                                         # First case, the limiting factor is the width, not the height.
 380                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 381                                                 $height = round( $height * $maxWidth / $width );
 382                                                 $width = $maxWidth;
 383                                                 # Note that $height <= $maxHeight now.
 384                                         } else {
 385                                                 $newwidth = floor( $width * $maxHeight / $height );
 386                                                 $height = round( $height * $newwidth / $width );
 387                                                 $width = $newwidth;
 388                                                 # Note that $height <= $maxHeight now, but might not be identical
 389                                                 # because of rounding.
 390                                         }
 391                                         $msgbig = wfMessage( 'show-big-image' )->escaped();
 392                                         if ( $this->displayImg->getRepo()->canTransformVia404() ) {
 393                                                 $thumbSizes = $wgImageLimits;
 394                                         } else {
 395                                                 # Creating thumb links triggers thumbnail generation.
 396                                                 # Just generate the thumb for the current users prefs.
 397                                                 $thumbOption = $user->getOption( 'thumbsize' );
 398                                                 $thumbSizes = array( isset( $wgImageLimits[$thumbOption] )
 399                                                         ? $wgImageLimits[$thumbOption]
 400                                                         : $wgImageLimits[User::getDefaultOption( 'thumbsize' )] );
 401                                         }
 402                                         # Generate thumbnails or thumbnail links as needed...
 403                                         $otherSizes = array();
 404                                         foreach ( $thumbSizes as $size ) {
 405                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig
 406                                                         && $size[0] != $width && $size[1] != $height )
 407                                                 {
 408                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 409                                                 }
 410                                         }
 411                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 412                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 413                                                 parse();
 414                                         if ( count( $otherSizes ) ) {
 415                                                 $msgsmall .= ' ' .
 416                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 417                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 418                                                         params( count( $otherSizes ) )->parse()
 419                                                 );
 420                                         }
 421                                 } elseif ( $width == 0 && $height == 0 ){
 422                                         # Some sort of audio file that doesn't have dimensions
 423                                         # Don't output a no hi res message for such a file
 424                                         $msgsmall = '';
 425                                 } else {
 426                                         # Image is small enough to show full size on image page
 427                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 428                                 }
 429
 430                                 $params['width'] = $width;
 431                                 $params['height'] = $height;
 432                                 $thumbnail = $this->displayImg->transform( $params );
 433
 434                                 $showLink = true;
 435                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 436
 437                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 438                                 if ( $isMulti ) {
 439                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 440                                 }
 441
 442                                 if ( $thumbnail ) {
 443                                         $options = array(
 444                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 445                                                 'file-link' => true,
 446                                         );
 447                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 448                                                 $thumbnail->toHtml( $options ) .
 449                                                 $anchorclose . "</div>\n" );
 450                                 }
 451
 452                                 if ( $isMulti ) {
 453                                         $count = $this->displayImg->pageCount();
 454
 455                                         if ( $page > 1 ) {
 456                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 457                                                 $link = Linker::linkKnown(
 458                                                         $this->getTitle(),
 459                                                         $label,
 460                                                         array(),
 461                                                         array( 'page' => $page - 1 )
 462                                                 );
 463                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 464                                                         array( 'page' => $page - 1 ) );
 465                                         } else {
 466                                                 $thumb1 = '';
 467                                         }
 468
 469                                         if ( $page < $count ) {
 470                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 471                                                 $link = Linker::linkKnown(
 472                                                         $this->getTitle(),
 473                                                         $label,
 474                                                         array(),
 475                                                         array( 'page' => $page + 1 )
 476                                                 );
 477                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 478                                                         array( 'page' => $page + 1 ) );
 479                                         } else {
 480                                                 $thumb2 = '';
 481                                         }
 482
 483                                         global $wgScript;
 484
 485                                         $formParams = array(
 486                                                 'name' => 'pageselector',
 487                                                 'action' => $wgScript,
 488                                                 'onchange' => 'document.pageselector.submit();',
 489                                         );
 490                                         $options = array();
 491                                         for ( $i = 1; $i <= $count; $i++ ) {
 492                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 493                                         }
 494                                         $select = Xml::tags( 'select',
 495                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 496                                                 implode( "\n", $options ) );
 497
 498                                         $out->addHTML(
 499                                                 '</td><td><div class="multipageimagenavbox">' .
 500                                                 Xml::openElement( 'form', $formParams ) .
 501                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 502                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 503                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 504                                                 Xml::closeElement( 'form' ) .
 505                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 506                                         );
 507                                 }
 508                         } else {
 509                                 # if direct link is allowed but it's not a renderable image, show an icon.
 510                                 if ( $this->displayImg->isSafeFile() ) {
 511                                         $icon = $this->displayImg->iconThumb();
 512
 513                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 514                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 515                                                 "</div>\n" );
 516                                 }
 517
 518                                 $showLink = true;
 519                         }
 520
 521                         if ( $showLink ) {
 522                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 523                                 $linktext = $filename;
 524                                 if ( isset( $msgbig ) ) {
 525                                         $linktext = wfEscapeWikiText( $msgbig );
 526                                 }
 527                                 $medialink = "[[Media:$filename|$linktext]]";
 528
 529                                 if ( !$this->displayImg->isSafeFile() ) {
 530                                         $warning = wfMessage( 'mediawarning' )->plain();
 531                                         // dirmark is needed here to separate the file name, which
 532                                         // most likely ends in Latin characters, from the description,
 533                                         // which may begin with the file type. In RTL environment
 534                                         // this will get messy.
 535                                         // The dirmark, however, must not be immediately adjacent
 536                                         // to the filename, because it can get copied with it.
 537                                         // See bug 25277.
 538                                         $out->addWikiText( <<<EOT
 539 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 540 <div class="mediaWarning">$warning</div>
 541 EOT
 542                                                 );
 543                                 } else {
 544                                         $out->addWikiText( <<<EOT
 545 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 546 </div>
 547 EOT
 548                                         );
 549                                 }
 550                         }
 551
 552                         // Add cannot animate thumbnail warning
 553                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 554                                 // Include the extension so wiki admins can
 555                                 // customize it on a per file-type basis
 556                                 // (aka say things like use format X instead).
 557                                 // additionally have a specific message for
 558                                 // file-no-thumb-animation-gif
 559                                 $ext = $this->displayImg->getExtension();
 560                                 $noAnimMesg = wfMessageFallback(
 561                                         'file-no-thumb-animation-' . $ext,
 562                                         'file-no-thumb-animation'
 563                                 )->plain();
 564
 565                                 $out->addWikiText( <<<EOT
 566 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 567 EOT
 568                                 );
 569                         }
 570
 571                         if ( !$this->displayImg->isLocal() ) {
 572                                 $this->printSharedImageText();
 573                         }
 574                 } else {
 575                         # Image does not exist
 576                         if ( !$this->getID() ) {
 577                                 # No article exists either
 578                                 # Show deletion log to be consistent with normal articles
 579                                 LogEventsList::showLogExtract(
 580                                         $out,
 581                                         array( 'delete', 'move' ),
 582                                         $this->getTitle()->getPrefixedText(),
 583                                         '',
 584                                         array(  'lim' => 10,
 585                                                 'conds' => array( "log_action != 'revision'" ),
 586                                                 'showIfEmpty' => false,
 587                                                 'msgKey' => array( 'moveddeleted-notice' )
 588                                         )
 589                                 );
 590                         }
 591
 592                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 593                                 // Only show an upload link if the user can upload
 594                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 595                                 $nofile = array(
 596                                         'filepage-nofile-link',
 597                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 598                                 );
 599                         } else {
 600                                 $nofile = 'filepage-nofile';
 601                         }
 602                         // Note, if there is an image description page, but
 603                         // no image, then this setRobotPolicy is overriden
 604                         // by Article::View().
 605                         $out->setRobotPolicy( 'noindex,nofollow' );
 606                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 607                         if ( !$this->getID() && $wgSend404Code ) {
 608                                 // If there is no image, no shared image, and no description page,
 609                                 // output a 404, to be consistent with articles.
 610                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 611                         }
 612                 }
 613                 $out->setFileVersion( $this->displayImg );
 614         }
 615
 616         /**
 617          * Creates an thumbnail of specified size and returns an HTML link to it
 618          * @param $params array Scaler parameters
 619          * @param $width int
 620          * @param $height int
 621          * @return string
 622          */
 623         private function makeSizeLink( $params, $width, $height ) {
 624                 $params['width'] = $width;
 625                 $params['height'] = $height;
 626                 $thumbnail = $this->displayImg->transform( $params );
 627                 if ( $thumbnail && !$thumbnail->isError() ) {
 628                         return Html::rawElement( 'a', array(
 629                                 'href' => $thumbnail->getUrl(),
 630                                 'class' => 'mw-thumbnail-link'
 631                                 ), wfMessage( 'show-big-image-size' )->numParams(
 632                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 633                                 )->parse() );
 634                 } else {
 635                         return '';
 636                 }
 637         }
 638
 639         /**
 640          * Show a notice that the file is from a shared repository
 641          */
 642         protected function printSharedImageText() {
 643                 $out = $this->getContext()->getOutput();
 644                 $this->loadFile();
 645
 646                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 647                 $descText = $this->mPage->getFile()->getDescriptionText();
 648
 649                 /* Add canonical to head if there is no local page for this shared file */
 650                 if( $descUrl && $this->mPage->getID() == 0 ) {
 651                         $out->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 652                 }
 653
 654                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 655                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 656
 657                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-'  ) {
 658                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 659                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 660                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 661                 } else {
 662                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 663                 }
 664
 665                 if ( $descText ) {
 666                         $this->mExtraDescription = $descText;
 667                 }
 668         }
 669
 670         public function getUploadUrl() {
 671                 $this->loadFile();
 672                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 673                 return $uploadTitle->getFullURL( array(
 674                         'wpDestFile' => $this->mPage->getFile()->getName(),
 675                         'wpForReUpload' => 1
 676                  ) );
 677         }
 678
 679         /**
 680          * Print out the various links at the bottom of the image page, e.g. reupload,
 681          * external editing (and instructions link) etc.
 682          */
 683         protected function uploadLinksBox() {
 684                 global $wgEnableUploads, $wgUseExternalEditor;
 685
 686                 if ( !$wgEnableUploads ) {
 687                         return;
 688                 }
 689
 690                 $this->loadFile();
 691                 if ( !$this->mPage->getFile()->isLocal() ) {
 692                         return;
 693                 }
 694
 695                 $out = $this->getContext()->getOutput();
 696                 $out->addHTML( "<ul>\n" );
 697
 698                 # "Upload a new version of this file" link
 699                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 700                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 701                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 702                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 703                 } else {
 704                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 705                 }
 706
 707                 # External editing link
 708                 if ( $wgUseExternalEditor ) {
 709                         $elink = Linker::linkKnown(
 710                                 $this->getTitle(),
 711                                 wfMessage( 'edit-externally' )->escaped(),
 712                                 array(),
 713                                 array(
 714                                         'action' => 'edit',
 715                                         'externaledit' => 'true',
 716                                         'mode' => 'file'
 717                                 )
 718                         );
 719                         $out->addHTML(
 720                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 721                                         wfMessage( 'edit-externally-help' )->parse() .
 722                                         "</small></li>\n"
 723                         );
 724                 }
 725
 726                 $out->addHTML( "</ul>\n" );
 727         }
 728
 729         protected function closeShowImage() { } # For overloading
 730
 731         /**
 732          * If the page we've just displayed is in the "Image" namespace,
 733          * we follow it with an upload history of the image and its usage.
 734          */
 735         protected function imageHistory() {
 736                 $this->loadFile();
 737                 $out = $this->getContext()->getOutput();
 738                 $pager = new ImageHistoryPseudoPager( $this );
 739                 $out->addHTML( $pager->getBody() );
 740                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 741
 742                 $this->mPage->getFile()->resetHistory(); // free db resources
 743
 744                 # Exist check because we don't want to show this on pages where an image
 745                 # doesn't exist along with the noimage message, that would suck. -ævar
 746                 if ( $this->mPage->getFile()->exists() ) {
 747                         $this->uploadLinksBox();
 748                 }
 749         }
 750
 751         /**
 752          * @param $target
 753          * @param $limit
 754          * @return ResultWrapper
 755          */
 756         protected function queryImageLinks( $target, $limit ) {
 757                 $dbr = wfGetDB( DB_SLAVE );
 758
 759                 return $dbr->select(
 760                         array( 'imagelinks', 'page' ),
 761                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 762                         array( 'il_to' => $target, 'il_from = page_id' ),
 763                         __METHOD__,
 764                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 765                 );
 766         }
 767
 768         protected function imageLinks() {
 769                 $limit = 100;
 770
 771                 $out = $this->getContext()->getOutput();
 772                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 773                 $rows = array();
 774                 $redirects = array();
 775                 foreach ( $res as $row ) {
 776                         if ( $row->page_is_redirect ) {
 777                                 $redirects[$row->page_title] = array();
 778                         }
 779                         $rows[] = $row;
 780                 }
 781                 $count = count( $rows );
 782
 783                 $hasMore = $count > $limit;
 784                 if ( !$hasMore && count( $redirects ) ) {
 785                         $res = $this->queryImageLinks( array_keys( $redirects ),
 786                                 $limit - count( $rows ) + 1 );
 787                         foreach ( $res as $row ) {
 788                                 $redirects[$row->il_to][] = $row;
 789                                 $count++;
 790                         }
 791                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 792                 }
 793
 794                 if ( $count == 0 ) {
 795                         $out->wrapWikiMsg(
 796                                 Html::rawElement( 'div',
 797                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 798                                 'nolinkstoimage'
 799                         );
 800                         return;
 801                 }
 802
 803                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 804                 if ( !$hasMore ) {
 805                         $out->addWikiMsg( 'linkstoimage', $count );
 806                 } else {
 807                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 808                         $out->addWikiMsg( 'linkstoimage-more',
 809                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 810                                 $this->getTitle()->getPrefixedDBkey()
 811                         );
 812                 }
 813
 814                 $out->addHTML(
 815                         Html::openElement( 'ul',
 816                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 817                 );
 818                 $count = 0;
 819
 820                 // Sort the list by namespace:title
 821                 usort( $rows, array( $this, 'compare' ) );
 822
 823                 // Create links for every element
 824                 $currentCount = 0;
 825                 foreach( $rows as $element ) {
 826                         $currentCount++;
 827                         if ( $currentCount > $limit ) {
 828                                 break;
 829                         }
 830
 831                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 832                         if ( !isset( $redirects[$element->page_title] ) ) {
 833                                 $liContents = $link;
 834                         } else {
 835                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 836                                 foreach ( $redirects[$element->page_title] as $row ) {
 837                                         $currentCount++;
 838                                         if ( $currentCount > $limit ) {
 839                                                 break;
 840                                         }
 841
 842                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 843                                         $ul .= Html::rawElement(
 844                                                 'li',
 845                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 846                                                 $link2
 847                                                 ) . "\n";
 848                                 }
 849                                 $ul .= '</ul>';
 850                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 851                                         $link, $ul )->parse();
 852                         }
 853                         $out->addHTML( Html::rawElement(
 854                                         'li',
 855                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 856                                         $liContents
 857                                 ) . "\n"
 858                         );
 859
 860                 };
 861                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 862                 $res->free();
 863
 864                 // Add a links to [[Special:Whatlinkshere]]
 865                 if ( $count > $limit ) {
 866                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 867                 }
 868                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 869         }
 870
 871         protected function imageDupes() {
 872                 $this->loadFile();
 873                 $out = $this->getContext()->getOutput();
 874
 875                 $dupes = $this->mPage->getDuplicates();
 876                 if ( count( $dupes ) == 0 ) {
 877                         return;
 878                 }
 879
 880                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 881                 $out->addWikiMsg( 'duplicatesoffile',
 882                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 883                 );
 884                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 885
 886                 /**
 887                  * @var $file File
 888                  */
 889                 foreach ( $dupes as $file ) {
 890                         $fromSrc = '';
 891                         if ( $file->isLocal() ) {
 892                                 $link = Linker::linkKnown( $file->getTitle() );
 893                         } else {
 894                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 895                                         $file->getTitle()->getPrefixedText() );
 896                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 897                         }
 898                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 899                 }
 900                 $out->addHTML( "</ul></div>\n" );
 901         }
 902
 903         /**
 904          * Delete the file, or an earlier version of it
 905          */
 906         public function delete() {
 907                 $file = $this->mPage->getFile();
 908                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 909                         // Standard article deletion
 910                         parent::delete();
 911                         return;
 912                 }
 913
 914                 $deleter = new FileDeleteForm( $file );
 915                 $deleter->execute();
 916         }
 917
 918         /**
 919          * Display an error with a wikitext description
 920          *
 921          * @param $description String
 922          */
 923         function showError( $description ) {
 924                 $out = $this->getContext()->getOutput();
 925                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 926                 $out->setRobotPolicy( 'noindex,nofollow' );
 927                 $out->setArticleRelated( false );
 928                 $out->enableClientCache( false );
 929                 $out->addWikiText( $description );
 930         }
 931
 932         /**
 933          * Callback for usort() to do link sorts by (namespace, title)
 934          * Function copied from Title::compare()
 935          *
 936          * @param $a object page to compare with
 937          * @param $b object page to compare with
 938          * @return Integer: result of string comparison, or namespace comparison
 939          */
 940         protected function compare( $a, $b ) {
 941                 if ( $a->page_namespace == $b->page_namespace ) {
 942                         return strcmp( $a->page_title, $b->page_title );
 943                 } else {
 944                         return $a->page_namespace - $b->page_namespace;
 945                 }
 946         }
 947 }
 948
 949 /**
 950  * Builds the image revision log shown on image pages
 951  *
 952  * @ingroup Media
 953  */
 954 class ImageHistoryList extends ContextSource {
 955
 956         /**
 957          * @var Title
 958          */
 959         protected $title;
 960
 961         /**
 962          * @var File
 963          */
 964         protected $img;
 965
 966         /**
 967          * @var ImagePage
 968          */
 969         protected $imagePage;
 970
 971         /**
 972          * @var File
 973          */
 974         protected $current;
 975
 976         protected $repo, $showThumb;
 977         protected $preventClickjacking = false;
 978
 979         /**
 980          * @param ImagePage $imagePage
 981          */
 982         public function __construct( $imagePage ) {
 983                 global $wgShowArchiveThumbnails;
 984                 $this->current = $imagePage->getFile();
 985                 $this->img = $imagePage->getDisplayedFile();
 986                 $this->title = $imagePage->getTitle();
 987                 $this->imagePage = $imagePage;
 988                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 989                 $this->setContext( $imagePage->getContext() );
 990         }
 991
 992         /**
 993          * @return ImagePage
 994          */
 995         public function getImagePage() {
 996                 return $this->imagePage;
 997         }
 998
 999         /**
1000          * @return File
1001          */
1002         public function getFile() {
1003                 return $this->img;
1004         }
1005
1006         /**
1007          * @param $navLinks string
1008          * @return string
1009          */
1010         public function beginImageHistoryList( $navLinks = '' ) {
1011                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
1012                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1013                         . $this->msg( 'filehist-help' )->parseAsBlock()
1014                         . $navLinks . "\n"
1015                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1016                         . '<tr><td></td>'
1017                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1018                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1019                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1020                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1021                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1022                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1023                         . "</tr>\n";
1024         }
1025
1026         /**
1027          * @param $navLinks string
1028          * @return string
1029          */
1030         public function endImageHistoryList( $navLinks = '' ) {
1031                 return "</table>\n$navLinks\n</div>\n";
1032         }
1033
1034         /**
1035          * @param $iscur
1036          * @param $file File
1037          * @return string
1038          */
1039         public function imageHistoryLine( $iscur, $file ) {
1040                 global $wgContLang;
1041
1042                 $user = $this->getUser();
1043                 $lang = $this->getLanguage();
1044                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1045                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1046                 $userId = $file->getUser( 'id' );
1047                 $userText = $file->getUser( 'text' );
1048                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1049
1050                 $local = $this->current->isLocal();
1051                 $row = $selected = '';
1052
1053                 // Deletion link
1054                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1055                         $row .= '<td>';
1056                         # Link to remove from history
1057                         if ( $user->isAllowed( 'delete' ) ) {
1058                                 $q = array( 'action' => 'delete' );
1059                                 if ( !$iscur ) {
1060                                         $q['oldimage'] = $img;
1061                                 }
1062                                 $row .= Linker::linkKnown(
1063                                         $this->title,
1064                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1065                                         array(), $q
1066                                 );
1067                         }
1068                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1069                         $canHide = $user->isAllowed( 'deleterevision' );
1070                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1071                                 if ( $user->isAllowed( 'delete' ) ) {
1072                                         $row .= '<br />';
1073                                 }
1074                                 // If file is top revision or locked from this user, don't link
1075                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1076                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1077                                 } else {
1078                                         list( $ts, ) = explode( '!', $img, 2 );
1079                                         $query = array(
1080                                                 'type'   => 'oldimage',
1081                                                 'target' => $this->title->getPrefixedText(),
1082                                                 'ids'    => $ts,
1083                                         );
1084                                         $del = Linker::revDeleteLink( $query,
1085                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1086                                 }
1087                                 $row .= $del;
1088                         }
1089                         $row .= '</td>';
1090                 }
1091
1092                 // Reversion link/current indicator
1093                 $row .= '<td>';
1094                 if ( $iscur ) {
1095                         $row .= $this->msg( 'filehist-current' )->escaped();
1096                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1097                         && $this->title->quickUserCan( 'upload', $user )
1098                 ) {
1099                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1100                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1101                         } else {
1102                                 $row .= Linker::linkKnown(
1103                                         $this->title,
1104                                         $this->msg( 'filehist-revert' )->escaped(),
1105                                         array(),
1106                                         array(
1107                                                 'action' => 'revert',
1108                                                 'oldimage' => $img,
1109                                                 'wpEditToken' => $user->getEditToken( $img )
1110                                         )
1111                                 );
1112                         }
1113                 }
1114                 $row .= '</td>';
1115
1116                 // Date/time and image link
1117                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1118                         $selected = "class='filehistory-selected'";
1119                 }
1120                 $row .= "<td $selected style='white-space: nowrap;'>";
1121                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1122                         # Don't link to unviewable files
1123                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1124                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1125                         if ( $local ) {
1126                                 $this->preventClickjacking();
1127                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1128                                 # Make a link to review the image
1129                                 $url = Linker::linkKnown(
1130                                         $revdel,
1131                                         $lang->userTimeAndDate( $timestamp, $user ),
1132                                         array(),
1133                                         array(
1134                                                 'target' => $this->title->getPrefixedText(),
1135                                                 'file' => $img,
1136                                                 'token' => $user->getEditToken( $img )
1137                                         )
1138                                 );
1139                         } else {
1140                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1141                         }
1142                         $row .= '<span class="history-deleted">' . $url . '</span>';
1143                 } else {
1144                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1145                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1146                 }
1147                 $row .= "</td>";
1148
1149                 // Thumbnail
1150                 if ( $this->showThumb ) {
1151                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1152                 }
1153
1154                 // Image dimensions + size
1155                 $row .= '<td>';
1156                 $row .= htmlspecialchars( $file->getDimensionsString() );
1157                 $row .= $this->msg( 'word-separator' )->plain();
1158                 $row .= '<span style="white-space: nowrap;">';
1159                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1160                 $row .= '</span>';
1161                 $row .= '</td>';
1162
1163                 // Uploading user
1164                 $row .= '<td>';
1165                 // Hide deleted usernames
1166                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1167                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1168                 } else {
1169                         if ( $local ) {
1170                                 $row .= Linker::userLink( $userId, $userText );
1171                                 $row .= $this->msg( 'word-separator' )->plain();
1172                                 $row .= '<span style="white-space: nowrap;">';
1173                                 $row .= Linker::userToolLinks( $userId, $userText );
1174                                 $row .= '</span>';
1175                         } else {
1176                                 $row .= htmlspecialchars( $userText );
1177                         }
1178                 }
1179                 $row .= '</td>';
1180
1181                 // Don't show deleted descriptions
1182                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1183                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1184                 } else {
1185                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1186                 }
1187
1188                 $rowClass = null;
1189                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1190                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1191
1192                 return "<tr{$classAttr}>{$row}</tr>\n";
1193         }
1194
1195         /**
1196          * @param $file File
1197          * @return string
1198          */
1199         protected function getThumbForLine( $file ) {
1200                 $lang = $this->getLanguage();
1201                 $user = $this->getUser();
1202                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE,$user )
1203                         && !$file->isDeleted( File::DELETED_FILE ) )
1204                 {
1205                         $params = array(
1206                                 'width' => '120',
1207                                 'height' => '120',
1208                         );
1209                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1210
1211                         $thumbnail = $file->transform( $params );
1212                         $options = array(
1213                                 'alt' => $this->msg( 'filehist-thumbtext',
1214                                         $lang->userTimeAndDate( $timestamp, $user ),
1215                                         $lang->userDate( $timestamp, $user ),
1216                                         $lang->userTime( $timestamp, $user ) )->text(),
1217                                 'file-link' => true,
1218                         );
1219
1220                         if ( !$thumbnail ) {
1221                                 return $this->msg( 'filehist-nothumb' )->escaped();
1222                         }
1223
1224                         return $thumbnail->toHtml( $options );
1225                 } else {
1226                         return $this->msg( 'filehist-nothumb' )->escaped();
1227                 }
1228         }
1229
1230         /**
1231          * @param $enable bool
1232          */
1233         protected function preventClickjacking( $enable = true ) {
1234                 $this->preventClickjacking = $enable;
1235         }
1236
1237         /**
1238          * @return bool
1239          */
1240         public function getPreventClickjacking() {
1241                 return $this->preventClickjacking;
1242         }
1243 }
1244
1245 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1246         protected $preventClickjacking = false;
1247
1248         /**
1249          * @var File
1250          */
1251         protected $mImg;
1252
1253         /**
1254          * @var Title
1255          */
1256         protected $mTitle;
1257
1258         /**
1259          * @param ImagePage $imagePage
1260          */
1261         function __construct( $imagePage ) {
1262                 parent::__construct();
1263                 $this->mImagePage = $imagePage;
1264                 $this->mTitle = clone ( $imagePage->getTitle() );
1265                 $this->mTitle->setFragment( '#filehistory' );
1266                 $this->mImg = null;
1267                 $this->mHist = array();
1268                 $this->mRange = array( 0, 0 ); // display range
1269         }
1270
1271         /**
1272          * @return Title
1273          */
1274         function getTitle() {
1275                 return $this->mTitle;
1276         }
1277
1278         function getQueryInfo() {
1279                 return false;
1280         }
1281
1282         /**
1283          * @return string
1284          */
1285         function getIndexField() {
1286                 return '';
1287         }
1288
1289         /**
1290          * @param $row object
1291          * @return string
1292          */
1293         function formatRow( $row ) {
1294                 return '';
1295         }
1296
1297         /**
1298          * @return string
1299          */
1300         function getBody() {
1301                 $s = '';
1302                 $this->doQuery();
1303                 if ( count( $this->mHist ) ) {
1304                         $list = new ImageHistoryList( $this->mImagePage );
1305                         # Generate prev/next links
1306                         $navLink = $this->getNavigationBar();
1307                         $s = $list->beginImageHistoryList( $navLink );
1308                         // Skip rows there just for paging links
1309                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1310                                 $file = $this->mHist[$i];
1311                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1312                         }
1313                         $s .= $list->endImageHistoryList( $navLink );
1314
1315                         if ( $list->getPreventClickjacking() ) {
1316                                 $this->preventClickjacking();
1317                         }
1318                 }
1319                 return $s;
1320         }
1321
1322         function doQuery() {
1323                 if ( $this->mQueryDone ) {
1324                         return;
1325                 }
1326                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1327                 if ( !$this->mImg->exists() ) {
1328                         return;
1329                 }
1330                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1331                 if ( $this->mIsBackwards ) {
1332                         // Fetch the file history
1333                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1334                         // The current rev may not meet the offset/limit
1335                         $numRows = count( $this->mHist );
1336                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1337                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1338                         }
1339                 } else {
1340                         // The current rev may not meet the offset
1341                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1342                                 $this->mHist[] = $this->mImg;
1343                         }
1344                         // Old image versions (fetch extra row for nav links)
1345                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1346                         // Fetch the file history
1347                         $this->mHist = array_merge( $this->mHist,
1348                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1349                 }
1350                 $numRows = count( $this->mHist ); // Total number of query results
1351                 if ( $numRows ) {
1352                         # Index value of top item in the list
1353                         $firstIndex = $this->mIsBackwards ?
1354                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1355                         # Discard the extra result row if there is one
1356                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1357                                 if ( $this->mIsBackwards ) {
1358                                         # Index value of item past the index
1359                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1360                                         # Index value of bottom item in the list
1361                                         $lastIndex = $this->mHist[1]->getTimestamp();
1362                                         # Display range
1363                                         $this->mRange = array( 1, $numRows - 1 );
1364                                 } else {
1365                                         # Index value of item past the index
1366                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1367                                         # Index value of bottom item in the list
1368                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1369                                         # Display range
1370                                         $this->mRange = array( 0, $numRows - 2 );
1371                                 }
1372                         } else {
1373                                 # Setting indexes to an empty string means that they will be
1374                                 # omitted if they would otherwise appear in URLs. It just so
1375                                 # happens that this  is the right thing to do in the standard
1376                                 # UI, in all the relevant cases.
1377                                 $this->mPastTheEndIndex = '';
1378                                 # Index value of bottom item in the list
1379                                 $lastIndex = $this->mIsBackwards ?
1380                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1381                                 # Display range
1382                                 $this->mRange = array( 0, $numRows - 1 );
1383                         }
1384                 } else {
1385                         $firstIndex = '';
1386                         $lastIndex = '';
1387                         $this->mPastTheEndIndex = '';
1388                 }
1389                 if ( $this->mIsBackwards ) {
1390                         $this->mIsFirst = ( $numRows < $queryLimit );
1391                         $this->mIsLast = ( $this->mOffset == '' );
1392                         $this->mLastShown = $firstIndex;
1393                         $this->mFirstShown = $lastIndex;
1394                 } else {
1395                         $this->mIsFirst = ( $this->mOffset == '' );
1396                         $this->mIsLast = ( $numRows < $queryLimit );
1397                         $this->mLastShown = $lastIndex;
1398                         $this->mFirstShown = $firstIndex;
1399                 }
1400                 $this->mQueryDone = true;
1401         }
1402
1403         /**
1404          * @param $enable bool
1405          */
1406         protected function preventClickjacking( $enable = true ) {
1407                 $this->preventClickjacking = $enable;
1408         }
1409
1410         /**
1411          * @return bool
1412          */
1413         public function getPreventClickjacking() {
1414                 return $this->preventClickjacking;
1415         }
1416
1417 }