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 int $id 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          */
  98         public function render() {
  99                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
 100                 parent::view();
 101         }
 102
 103         public function view() {
 104                 global $wgShowEXIF;
 105
 106                 $out = $this->getContext()->getOutput();
 107                 $request = $this->getContext()->getRequest();
 108                 $diff = $request->getVal( 'diff' );
 109                 $diffOnly = $request->getBool( 'diffonly', $this->getContext()->getUser()->getOption( 'diffonly' ) );
 110
 111                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( $diff !== null && $diffOnly ) ) {
 112                         parent::view();
 113                         return;
 114                 }
 115
 116                 $this->loadFile();
 117
 118                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 119                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || $diff !== null ) {
 120                                 // mTitle is the same as the redirect target so ask Article
 121                                 // to perform the redirect for us.
 122                                 $request->setVal( 'diffonly', 'true' );
 123                                 parent::view();
 124                                 return;
 125                         } else {
 126                                 // mTitle is not the same as the redirect target so it is
 127                                 // probably the redirect page itself. Fake the redirect symbol
 128                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 129                                 $out->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 130                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 131                                 $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 132                                 return;
 133                         }
 134                 }
 135
 136                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 137                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 138                         $formattedMetadata = $this->displayImg->formatMetadata();
 139                         $showmeta = $formattedMetadata !== false;
 140                 } else {
 141                         $showmeta = false;
 142                 }
 143
 144                 if ( !$diff && $this->displayImg->exists() ) {
 145                         $out->addHTML( $this->showTOC( $showmeta ) );
 146                 }
 147
 148                 if ( !$diff ) {
 149                         $this->openShowImage();
 150                 }
 151
 152                 # No need to display noarticletext, we use our own message, output in openShowImage()
 153                 if ( $this->mPage->getID() ) {
 154                         # NS_FILE is in the user language, but this section (the actual wikitext)
 155                         # should be in page content language
 156                         $pageLang = $this->getTitle()->getPageViewLanguage();
 157                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 158                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 159                                 'class' => 'mw-content-' . $pageLang->getDir() ) ) );
 160
 161                         parent::view();
 162
 163                         $out->addHTML( Xml::closeElement( 'div' ) );
 164                 } else {
 165                         # Just need to set the right headers
 166                         $out->setArticleFlag( true );
 167                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 168                         $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 169                 }
 170
 171                 # Show shared description, if needed
 172                 if ( $this->mExtraDescription ) {
 173                         $fol = wfMessage( 'shareddescriptionfollows' );
 174                         if ( !$fol->isDisabled() ) {
 175                                 $out->addWikiText( $fol->plain() );
 176                         }
 177                         $out->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 178                 }
 179
 180                 $this->closeShowImage();
 181                 $this->imageHistory();
 182                 // TODO: Cleanup the following
 183
 184                 $out->addHTML( Xml::element( 'h2',
 185                         array( 'id' => 'filelinks' ),
 186                         wfMessage( 'imagelinks' )->text() ) . "\n" );
 187                 $this->imageDupes();
 188                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 189                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 190                 $this->imageLinks();
 191
 192                 # Allow extensions to add something after the image links
 193                 $html = '';
 194                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 195                 if ( $html ) {
 196                         $out->addHTML( $html );
 197                 }
 198
 199                 if ( $showmeta ) {
 200                         $out->addHTML( Xml::element(
 201                                 'h2',
 202                                 array( 'id' => 'metadata' ),
 203                                 wfMessage( 'metadata' )->text() ) . "\n" );
 204                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 205                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 206                 }
 207
 208                 // Add remote Filepage.css
 209                 if ( !$this->repo->isLocal() ) {
 210                         $css = $this->repo->getDescriptionStylesheetUrl();
 211                         if ( $css ) {
 212                                 $out->addStyle( $css );
 213                         }
 214                 }
 215                 // always show the local local Filepage.css, bug 29277
 216                 $out->addModuleStyles( 'filepage' );
 217         }
 218
 219         /**
 220          * @return File
 221          */
 222         public function getDisplayedFile() {
 223                 $this->loadFile();
 224                 return $this->displayImg;
 225         }
 226
 227         /**
 228          * Create the TOC
 229          *
 230          * @param $metadata Boolean: whether or not to show the metadata link
 231          * @return String
 232          */
 233         protected function showTOC( $metadata ) {
 234                 $r = array(
 235                         '<li><a href="#file">' . wfMessage( 'file-anchor-link' )->escaped() . '</a></li>',
 236                         '<li><a href="#filehistory">' . wfMessage( 'filehist' )->escaped() . '</a></li>',
 237                         '<li><a href="#filelinks">' . wfMessage( 'imagelinks' )->escaped() . '</a></li>',
 238                 );
 239                 if ( $metadata ) {
 240                         $r[] = '<li><a href="#metadata">' . wfMessage( 'metadata' )->escaped() . '</a></li>';
 241                 }
 242
 243                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 244
 245                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 246         }
 247
 248         /**
 249          * Make a table with metadata to be shown in the output page.
 250          *
 251          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 252          *
 253          * @param array $metadata the array containing the Exif data
 254          * @return String The metadata table. This is treated as Wikitext (!)
 255          */
 256         protected function makeMetadataTable( $metadata ) {
 257                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 258                 $r .= wfMessage( 'metadata-help' )->plain();
 259                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 260                 foreach ( $metadata as $type => $stuff ) {
 261                         foreach ( $stuff as $v ) {
 262                                 # @todo FIXME: Why is this using escapeId for a class?!
 263                                 $class = Sanitizer::escapeId( $v['id'] );
 264                                 if ( $type == 'collapsed' ) {
 265                                         $class .= ' collapsable'; // sic
 266                                 }
 267                                 $r .= "<tr class=\"$class\">\n";
 268                                 $r .= "<th>{$v['name']}</th>\n";
 269                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 270                         }
 271                 }
 272                 $r .= "</table>\n</div>\n";
 273                 return $r;
 274         }
 275
 276         /**
 277          * Overloading Article's getContentObject method.
 278          *
 279          * Omit noarticletext if sharedupload; text will be fetched from the
 280          * shared upload server if possible.
 281          * @return string
 282          */
 283         public function getContentObject() {
 284                 $this->loadFile();
 285                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 286                         return null;
 287                 }
 288                 return parent::getContentObject();
 289         }
 290
 291         protected function openShowImage() {
 292                 global $wgImageLimits, $wgEnableUploads, $wgSend404Code;
 293
 294                 $this->loadFile();
 295                 $out = $this->getContext()->getOutput();
 296                 $user = $this->getContext()->getUser();
 297                 $lang = $this->getContext()->getLanguage();
 298                 $dirmark = $lang->getDirMarkEntity();
 299                 $request = $this->getContext()->getRequest();
 300
 301                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 302                 $maxWidth = $max[0];
 303                 $maxHeight = $max[1];
 304
 305                 if ( $this->displayImg->exists() ) {
 306                         # image
 307                         $page = $request->getIntOrNull( 'page' );
 308                         if ( is_null( $page ) ) {
 309                                 $params = array();
 310                                 $page = 1;
 311                         } else {
 312                                 $params = array( 'page' => $page );
 313                         }
 314
 315                         $renderLang = $request->getVal( 'lang' );
 316                         if ( !is_null( $renderLang ) ) {
 317                                 $params['lang'] = $renderLang;
 318                         }
 319
 320                         $width_orig = $this->displayImg->getWidth( $page );
 321                         $width = $width_orig;
 322                         $height_orig = $this->displayImg->getHeight( $page );
 323                         $height = $height_orig;
 324
 325                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 326                         $linktext = $filename;
 327
 328                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 329
 330                         if ( $this->displayImg->allowInlineDisplay() ) {
 331                                 # image
 332
 333                                 # "Download high res version" link below the image
 334                                 # $msgsize = wfMessage( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 335                                 # We'll show a thumbnail of this image
 336                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 337                                         # Calculate the thumbnail size.
 338                                         # First case, the limiting factor is the width, not the height.
 339                                         if ( $width / $height >= $maxWidth / $maxHeight ) { // FIXME: Possible division by 0. bug 36911
 340                                                 $height = round( $height * $maxWidth / $width ); // FIXME: Possible division by 0. bug 36911
 341                                                 $width = $maxWidth;
 342                                                 # Note that $height <= $maxHeight now.
 343                                         } else {
 344                                                 $newwidth = floor( $width * $maxHeight / $height ); // FIXME: Possible division by 0. bug 36911
 345                                                 $height = round( $height * $newwidth / $width ); // FIXME: Possible division by 0. bug 36911
 346                                                 $width = $newwidth;
 347                                                 # Note that $height <= $maxHeight now, but might not be identical
 348                                                 # because of rounding.
 349                                         }
 350                                         $linktext = wfMessage( 'show-big-image' )->escaped();
 351                                         if ( $this->displayImg->getRepo()->canTransformVia404() ) {
 352                                                 $thumbSizes = $wgImageLimits;
 353                                                 // Also include the full sized resolution in the list, so
 354                                                 // that users know they can get it. This will link to the
 355                                                 // original file asset if mustRender() === false. In the case
 356                                                 // that we mustRender, some users have indicated that they would
 357                                                 // find it useful to have the full size image in the rendered
 358                                                 // image format.
 359                                                 $thumbSizes[] = array( $width_orig, $height_orig );
 360                                         } else {
 361                                                 # Creating thumb links triggers thumbnail generation.
 362                                                 # Just generate the thumb for the current users prefs.
 363                                                 $thumbSizes = array( $this->getImageLimitsFromOption( $user, 'thumbsize' ) );
 364                                                 if ( !$this->displayImg->mustRender() ) {
 365                                                         // We can safely include a link to the "full-size" preview,
 366                                                         // without actually rendering.
 367                                                         $thumbSizes[] = array( $width_orig, $height_orig );
 368                                                 }
 369                                         }
 370                                         # Generate thumbnails or thumbnail links as needed...
 371                                         $otherSizes = array();
 372                                         foreach ( $thumbSizes as $size ) {
 373                                                 // We include a thumbnail size in the list, if it is
 374                                                 // less than or equal to the original size of the image
 375                                                 // asset ($width_orig/$height_orig). We also exclude
 376                                                 // the current thumbnail's size ($width/$height)
 377                                                 // since that is added to the message separately, so
 378                                                 // it can be denoted as the current size being shown.
 379                                                 if ( $size[0] <= $width_orig && $size[1] <= $height_orig
 380                                                         && $size[0] != $width && $size[1] != $height
 381                                                 ) {
 382                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 383                                                         if ( $sizeLink ) {
 384                                                                 $otherSizes[] = $sizeLink;
 385                                                         }
 386                                                 }
 387                                         }
 388                                         $otherSizes = array_unique( $otherSizes );
 389                                         $msgsmall = '';
 390                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 391                                         if ( $sizeLinkBigImagePreview ) {
 392                                                 $msgsmall .= wfMessage( 'show-big-image-preview' )->
 393                                                         rawParams( $sizeLinkBigImagePreview )->
 394                                                         parse();
 395                                         }
 396                                         if ( count( $otherSizes ) ) {
 397                                                 $msgsmall .= ' ' .
 398                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 399                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 400                                                         params( count( $otherSizes ) )->parse()
 401                                                 );
 402                                         }
 403                                 } elseif ( $width == 0 && $height == 0 ) {
 404                                         # Some sort of audio file that doesn't have dimensions
 405                                         # Don't output a no hi res message for such a file
 406                                         $msgsmall = '';
 407                                 } elseif ( $this->displayImg->isVectorized() ) {
 408                                         # For vectorized images, full size is just the frame size
 409                                         $msgsmall = '';
 410                                 } else {
 411                                         # Image is small enough to show full size on image page
 412                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 413                                 }
 414
 415                                 $params['width'] = $width;
 416                                 $params['height'] = $height;
 417                                 $thumbnail = $this->displayImg->transform( $params );
 418                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 419
 420                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 421
 422                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 423                                 if ( $isMulti ) {
 424                                         $out->addModules( 'mediawiki.page.image.pagination' );
 425                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 426                                 }
 427
 428                                 if ( $thumbnail ) {
 429                                         $options = array(
 430                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 431                                                 'file-link' => true,
 432                                         );
 433                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 434                                                 $thumbnail->toHtml( $options ) .
 435                                                 $anchorclose . "</div>\n" );
 436                                 }
 437
 438                                 if ( $isMulti ) {
 439                                         $count = $this->displayImg->pageCount();
 440
 441                                         if ( $page > 1 ) {
 442                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 443                                                 $link = Linker::linkKnown(
 444                                                         $this->getTitle(),
 445                                                         $label,
 446                                                         array(),
 447                                                         array( 'page' => $page - 1 )
 448                                                 );
 449                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 450                                                         array( 'page' => $page - 1 ) );
 451                                         } else {
 452                                                 $thumb1 = '';
 453                                         }
 454
 455                                         if ( $page < $count ) {
 456                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 457                                                 $link = Linker::linkKnown(
 458                                                         $this->getTitle(),
 459                                                         $label,
 460                                                         array(),
 461                                                         array( 'page' => $page + 1 )
 462                                                 );
 463                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 464                                                         array( 'page' => $page + 1 ) );
 465                                         } else {
 466                                                 $thumb2 = '';
 467                                         }
 468
 469                                         global $wgScript;
 470
 471                                         $formParams = array(
 472                                                 'name' => 'pageselector',
 473                                                 'action' => $wgScript,
 474                                         );
 475                                         $options = array();
 476                                         for ( $i = 1; $i <= $count; $i++ ) {
 477                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 478                                         }
 479                                         $select = Xml::tags( 'select',
 480                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 481                                                 implode( "\n", $options ) );
 482
 483                                         $out->addHTML(
 484                                                 '</td><td><div class="multipageimagenavbox">' .
 485                                                 Xml::openElement( 'form', $formParams ) .
 486                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 487                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 488                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 489                                                 Xml::closeElement( 'form' ) .
 490                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 491                                         );
 492                                 }
 493                         } elseif ( $this->displayImg->isSafeFile() ) {
 494                                 # if direct link is allowed but it's not a renderable image, show an icon.
 495                                 $icon = $this->displayImg->iconThumb();
 496
 497                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 498                                         $icon->toHtml( array( 'file-link' => true ) ) .
 499                                         "</div>\n" );
 500                         }
 501
 502                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 503
 504                         $medialink = "[[Media:$filename|$linktext]]";
 505
 506                         if ( !$this->displayImg->isSafeFile() ) {
 507                                 $warning = wfMessage( 'mediawarning' )->plain();
 508                                 // dirmark is needed here to separate the file name, which
 509                                 // most likely ends in Latin characters, from the description,
 510                                 // which may begin with the file type. In RTL environment
 511                                 // this will get messy.
 512                                 // The dirmark, however, must not be immediately adjacent
 513                                 // to the filename, because it can get copied with it.
 514                                 // See bug 25277.
 515                                 $out->addWikiText( <<<EOT
 516 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 517 <div class="mediaWarning">$warning</div>
 518 EOT
 519                                         );
 520                         } else {
 521                                 $out->addWikiText( <<<EOT
 522 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 523 </div>
 524 EOT
 525                                 );
 526                         }
 527
 528                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 529                         if ( count( $renderLangOptions ) >= 1 ) {
 530                                 $currentLanguage = $renderLang;
 531                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 532                                 if ( is_null( $currentLanguage ) ) {
 533                                         $currentLanguage = $defaultLang;
 534                                 }
 535                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 536                         }
 537
 538                         // Add cannot animate thumbnail warning
 539                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 540                                 // Include the extension so wiki admins can
 541                                 // customize it on a per file-type basis
 542                                 // (aka say things like use format X instead).
 543                                 // additionally have a specific message for
 544                                 // file-no-thumb-animation-gif
 545                                 $ext = $this->displayImg->getExtension();
 546                                 $noAnimMesg = wfMessageFallback(
 547                                         'file-no-thumb-animation-' . $ext,
 548                                         'file-no-thumb-animation'
 549                                 )->plain();
 550
 551                                 $out->addWikiText( <<<EOT
 552 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 553 EOT
 554                                 );
 555                         }
 556
 557                         if ( !$this->displayImg->isLocal() ) {
 558                                 $this->printSharedImageText();
 559                         }
 560                 } else {
 561                         # Image does not exist
 562                         if ( !$this->getID() ) {
 563                                 # No article exists either
 564                                 # Show deletion log to be consistent with normal articles
 565                                 LogEventsList::showLogExtract(
 566                                         $out,
 567                                         array( 'delete', 'move' ),
 568                                         $this->getTitle()->getPrefixedText(),
 569                                         '',
 570                                         array( 'lim' => 10,
 571                                                 'conds' => array( "log_action != 'revision'" ),
 572                                                 'showIfEmpty' => false,
 573                                                 'msgKey' => array( 'moveddeleted-notice' )
 574                                         )
 575                                 );
 576                         }
 577
 578                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 579                                 // Only show an upload link if the user can upload
 580                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 581                                 $nofile = array(
 582                                         'filepage-nofile-link',
 583                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 584                                 );
 585                         } else {
 586                                 $nofile = 'filepage-nofile';
 587                         }
 588                         // Note, if there is an image description page, but
 589                         // no image, then this setRobotPolicy is overridden
 590                         // by Article::View().
 591                         $out->setRobotPolicy( 'noindex,nofollow' );
 592                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 593                         if ( !$this->getID() && $wgSend404Code ) {
 594                                 // If there is no image, no shared image, and no description page,
 595                                 // output a 404, to be consistent with articles.
 596                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 597                         }
 598                 }
 599                 $out->setFileVersion( $this->displayImg );
 600         }
 601
 602         /**
 603          * Creates an thumbnail of specified size and returns an HTML link to it
 604          * @param array $params Scaler parameters
 605          * @param $width int
 606          * @param $height int
 607          * @return string
 608          */
 609         private function makeSizeLink( $params, $width, $height ) {
 610                 $params['width'] = $width;
 611                 $params['height'] = $height;
 612                 $thumbnail = $this->displayImg->transform( $params );
 613                 if ( $thumbnail && !$thumbnail->isError() ) {
 614                         return Html::rawElement( 'a', array(
 615                                 'href' => $thumbnail->getUrl(),
 616                                 'class' => 'mw-thumbnail-link'
 617                                 ), wfMessage( 'show-big-image-size' )->numParams(
 618                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 619                                 )->parse() );
 620                 } else {
 621                         return '';
 622                 }
 623         }
 624
 625         /**
 626          * Show a notice that the file is from a shared repository
 627          */
 628         protected function printSharedImageText() {
 629                 $out = $this->getContext()->getOutput();
 630                 $this->loadFile();
 631
 632                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 633                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 634
 635                 /* Add canonical to head if there is no local page for this shared file */
 636                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 637                         $out->setCanonicalUrl( $descUrl );
 638                 }
 639
 640                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 641                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 642
 643                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-' ) {
 644                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 645                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 646                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 647                 } else {
 648                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 649                 }
 650
 651                 if ( $descText ) {
 652                         $this->mExtraDescription = $descText;
 653                 }
 654         }
 655
 656         public function getUploadUrl() {
 657                 $this->loadFile();
 658                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 659                 return $uploadTitle->getFullURL( array(
 660                         'wpDestFile' => $this->mPage->getFile()->getName(),
 661                         'wpForReUpload' => 1
 662                 ) );
 663         }
 664
 665         /**
 666          * Print out the various links at the bottom of the image page, e.g. reupload,
 667          * external editing (and instructions link) etc.
 668          */
 669         protected function uploadLinksBox() {
 670                 global $wgEnableUploads;
 671
 672                 if ( !$wgEnableUploads ) {
 673                         return;
 674                 }
 675
 676                 $this->loadFile();
 677                 if ( !$this->mPage->getFile()->isLocal() ) {
 678                         return;
 679                 }
 680
 681                 $out = $this->getContext()->getOutput();
 682                 $out->addHTML( "<ul>\n" );
 683
 684                 # "Upload a new version of this file" link
 685                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 686                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 687                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 688                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 689                 } else {
 690                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 691                 }
 692
 693                 $out->addHTML( "</ul>\n" );
 694         }
 695
 696         protected function closeShowImage() { } # For overloading
 697
 698         /**
 699          * If the page we've just displayed is in the "Image" namespace,
 700          * we follow it with an upload history of the image and its usage.
 701          */
 702         protected function imageHistory() {
 703                 $this->loadFile();
 704                 $out = $this->getContext()->getOutput();
 705                 $pager = new ImageHistoryPseudoPager( $this );
 706                 $out->addHTML( $pager->getBody() );
 707                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 708
 709                 $this->mPage->getFile()->resetHistory(); // free db resources
 710
 711                 # Exist check because we don't want to show this on pages where an image
 712                 # doesn't exist along with the noimage message, that would suck. -ævar
 713                 if ( $this->mPage->getFile()->exists() ) {
 714                         $this->uploadLinksBox();
 715                 }
 716         }
 717
 718         /**
 719          * @param $target
 720          * @param $limit
 721          * @return ResultWrapper
 722          */
 723         protected function queryImageLinks( $target, $limit ) {
 724                 $dbr = wfGetDB( DB_SLAVE );
 725
 726                 return $dbr->select(
 727                         array( 'imagelinks', 'page' ),
 728                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 729                         array( 'il_to' => $target, 'il_from = page_id' ),
 730                         __METHOD__,
 731                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 732                 );
 733         }
 734
 735         protected function imageLinks() {
 736                 $limit = 100;
 737
 738                 $out = $this->getContext()->getOutput();
 739                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 740                 $rows = array();
 741                 $redirects = array();
 742                 foreach ( $res as $row ) {
 743                         if ( $row->page_is_redirect ) {
 744                                 $redirects[$row->page_title] = array();
 745                         }
 746                         $rows[] = $row;
 747                 }
 748                 $count = count( $rows );
 749
 750                 $hasMore = $count > $limit;
 751                 if ( !$hasMore && count( $redirects ) ) {
 752                         $res = $this->queryImageLinks( array_keys( $redirects ),
 753                                 $limit - count( $rows ) + 1 );
 754                         foreach ( $res as $row ) {
 755                                 $redirects[$row->il_to][] = $row;
 756                                 $count++;
 757                         }
 758                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 759                 }
 760
 761                 if ( $count == 0 ) {
 762                         $out->wrapWikiMsg(
 763                                 Html::rawElement( 'div',
 764                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 765                                 'nolinkstoimage'
 766                         );
 767                         return;
 768                 }
 769
 770                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 771                 if ( !$hasMore ) {
 772                         $out->addWikiMsg( 'linkstoimage', $count );
 773                 } else {
 774                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 775                         $out->addWikiMsg( 'linkstoimage-more',
 776                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 777                                 $this->getTitle()->getPrefixedDBkey()
 778                         );
 779                 }
 780
 781                 $out->addHTML(
 782                         Html::openElement( 'ul',
 783                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 784                 );
 785                 $count = 0;
 786
 787                 // Sort the list by namespace:title
 788                 usort( $rows, array( $this, 'compare' ) );
 789
 790                 // Create links for every element
 791                 $currentCount = 0;
 792                 foreach ( $rows as $element ) {
 793                         $currentCount++;
 794                         if ( $currentCount > $limit ) {
 795                                 break;
 796                         }
 797
 798                         $query = array();
 799                         # Add a redirect=no to make redirect pages reachable
 800                         if ( isset( $redirects[$element->page_title] ) ) {
 801                                 $query['redirect'] = 'no';
 802                         }
 803                         $link = Linker::linkKnown(
 804                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 805                                 null, array(), $query
 806                         );
 807                         if ( !isset( $redirects[$element->page_title] ) ) {
 808                                 # No redirects
 809                                 $liContents = $link;
 810                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 811                                 # Redirect without usages
 812                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 813                         } else {
 814                                 # Redirect with usages
 815                                 $li = '';
 816                                 foreach ( $redirects[$element->page_title] as $row ) {
 817                                         $currentCount++;
 818                                         if ( $currentCount > $limit ) {
 819                                                 break;
 820                                         }
 821
 822                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 823                                         $li .= Html::rawElement(
 824                                                 'li',
 825                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 826                                                 $link2
 827                                                 ) . "\n";
 828                                 }
 829
 830                                 $ul = Html::rawElement(
 831                                         'ul',
 832                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 833                                         $li
 834                                         ) . "\n";
 835                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 836                                         $link, $ul )->parse();
 837                         }
 838                         $out->addHTML( Html::rawElement(
 839                                         'li',
 840                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 841                                         $liContents
 842                                 ) . "\n"
 843                         );
 844
 845                 };
 846                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 847                 $res->free();
 848
 849                 // Add a links to [[Special:Whatlinkshere]]
 850                 if ( $count > $limit ) {
 851                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 852                 }
 853                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 854         }
 855
 856         protected function imageDupes() {
 857                 $this->loadFile();
 858                 $out = $this->getContext()->getOutput();
 859
 860                 $dupes = $this->mPage->getDuplicates();
 861                 if ( count( $dupes ) == 0 ) {
 862                         return;
 863                 }
 864
 865                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 866                 $out->addWikiMsg( 'duplicatesoffile',
 867                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 868                 );
 869                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 870
 871                 /**
 872                  * @var $file File
 873                  */
 874                 foreach ( $dupes as $file ) {
 875                         $fromSrc = '';
 876                         if ( $file->isLocal() ) {
 877                                 $link = Linker::linkKnown( $file->getTitle() );
 878                         } else {
 879                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 880                                         $file->getTitle()->getPrefixedText() );
 881                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 882                         }
 883                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 884                 }
 885                 $out->addHTML( "</ul></div>\n" );
 886         }
 887
 888         /**
 889          * Delete the file, or an earlier version of it
 890          */
 891         public function delete() {
 892                 $file = $this->mPage->getFile();
 893                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 894                         // Standard article deletion
 895                         parent::delete();
 896                         return;
 897                 }
 898
 899                 $deleter = new FileDeleteForm( $file );
 900                 $deleter->execute();
 901         }
 902
 903         /**
 904          * Display an error with a wikitext description
 905          *
 906          * @param $description String
 907          */
 908         function showError( $description ) {
 909                 $out = $this->getContext()->getOutput();
 910                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 911                 $out->setRobotPolicy( 'noindex,nofollow' );
 912                 $out->setArticleRelated( false );
 913                 $out->enableClientCache( false );
 914                 $out->addWikiText( $description );
 915         }
 916
 917         /**
 918          * Callback for usort() to do link sorts by (namespace, title)
 919          * Function copied from Title::compare()
 920          *
 921          * @param $a object page to compare with
 922          * @param $b object page to compare with
 923          * @return Integer: result of string comparison, or namespace comparison
 924          */
 925         protected function compare( $a, $b ) {
 926                 if ( $a->page_namespace == $b->page_namespace ) {
 927                         return strcmp( $a->page_title, $b->page_title );
 928                 } else {
 929                         return $a->page_namespace - $b->page_namespace;
 930                 }
 931         }
 932
 933         /**
 934          * Returns the corresponding $wgImageLimits entry for the selected user option
 935          *
 936          * @param $user User
 937          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 938          * @return array
 939          * @since 1.21
 940          */
 941         public function getImageLimitsFromOption( $user, $optionName ) {
 942                 global $wgImageLimits;
 943
 944                 $option = $user->getIntOption( $optionName );
 945                 if ( !isset( $wgImageLimits[$option] ) ) {
 946                         $option = User::getDefaultOption( $optionName );
 947                 }
 948
 949                 // The user offset might still be incorrect, specially if
 950                 // $wgImageLimits got changed (see bug #8858).
 951                 if ( !isset( $wgImageLimits[$option] ) ) {
 952                         // Default to the first offset in $wgImageLimits
 953                         $option = 0;
 954                 }
 955
 956                 return isset( $wgImageLimits[$option] )
 957                         ? $wgImageLimits[$option]
 958                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 959         }
 960
 961         /**
 962          * Output a drop-down box for language options for the file
 963          *
 964          * @param Array $langChoices Array of string language codes
 965          * @param String $curLang Language code file is being viewed in.
 966          * @param String $defaultLang Language code that image is rendered in by default
 967          * @return String HTML to insert underneath image.
 968          */
 969         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
 970                 global $wgScript;
 971                 sort( $langChoices );
 972                 $curLang = wfBCP47( $curLang );
 973                 $defaultLang = wfBCP47( $defaultLang );
 974                 $opts = '';
 975                 $haveCurrentLang = false;
 976                 $haveDefaultLang = false;
 977
 978                 // We make a list of all the language choices in the file.
 979                 // Additionally if the default language to render this file
 980                 // is not included as being in this file (for example, in svgs
 981                 // usually the fallback content is the english content) also
 982                 // include a choice for that. Last of all, if we're viewing
 983                 // the file in a language not on the list, add it as a choice.
 984                 foreach ( $langChoices as $lang ) {
 985                         $code = wfBCP47( $lang );
 986                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
 987                         if ( $name !== '' ) {
 988                                 $display = wfMessage( 'img-lang-opt', $code, $name )->text();
 989                         } else {
 990                                 $display = $code;
 991                         }
 992                         $opts .= "\n" . XML::Option( $display, $code, $curLang === $code );
 993                         if ( $curLang === $code ) {
 994                                 $haveCurrentLang = true;
 995                         }
 996                         if ( $defaultLang === $code ) {
 997                                 $haveDefaultLang = true;
 998                         }
 999                 }
1000                 if ( !$haveDefaultLang ) {
1001                         // Its hard to know if the content is really in the default language, or
1002                         // if its just unmarked content that could be in any language.
1003                         $opts = XML::Option( wfMessage( 'img-lang-default' )->text(), '', $defaultLang === $curLang ) . $opts;
1004                 }
1005                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1006                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1007                         if ( $name !== '' ) {
1008                                 $display = wfMessage( 'img-lang-opt', $curLang, $name )->text();
1009                         } else {
1010                                 $display = $curLang;
1011                         }
1012                         $opts = XML::Option( $display, $curLang, true ) . $opts;
1013                 }
1014
1015                 $select = Html::rawElement( 'select', array( 'id' => 'mw-imglangselector', 'name' => 'lang' ), $opts );
1016                 $submit = Xml::submitButton( wfMessage( 'img-lang-go' )->text() );
1017
1018                 $formContents = wfMessage( 'img-lang-info' )->rawParams( $select, $submit )->parse()
1019                         . Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1020
1021                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1022                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1023                 );
1024                 return $langSelectLine;
1025         }
1026 }
1027
1028 /**
1029  * Builds the image revision log shown on image pages
1030  *
1031  * @ingroup Media
1032  */
1033 class ImageHistoryList extends ContextSource {
1034
1035         /**
1036          * @var Title
1037          */
1038         protected $title;
1039
1040         /**
1041          * @var File
1042          */
1043         protected $img;
1044
1045         /**
1046          * @var ImagePage
1047          */
1048         protected $imagePage;
1049
1050         /**
1051          * @var File
1052          */
1053         protected $current;
1054
1055         protected $repo, $showThumb;
1056         protected $preventClickjacking = false;
1057
1058         /**
1059          * @param ImagePage $imagePage
1060          */
1061         public function __construct( $imagePage ) {
1062                 global $wgShowArchiveThumbnails;
1063                 $this->current = $imagePage->getFile();
1064                 $this->img = $imagePage->getDisplayedFile();
1065                 $this->title = $imagePage->getTitle();
1066                 $this->imagePage = $imagePage;
1067                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1068                 $this->setContext( $imagePage->getContext() );
1069         }
1070
1071         /**
1072          * @return ImagePage
1073          */
1074         public function getImagePage() {
1075                 return $this->imagePage;
1076         }
1077
1078         /**
1079          * @return File
1080          */
1081         public function getFile() {
1082                 return $this->img;
1083         }
1084
1085         /**
1086          * @param $navLinks string
1087          * @return string
1088          */
1089         public function beginImageHistoryList( $navLinks = '' ) {
1090                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
1091                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1092                         . $this->msg( 'filehist-help' )->parseAsBlock()
1093                         . $navLinks . "\n"
1094                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1095                         . '<tr><td></td>'
1096                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1097                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1098                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1099                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1100                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1101                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1102                         . "</tr>\n";
1103         }
1104
1105         /**
1106          * @param $navLinks string
1107          * @return string
1108          */
1109         public function endImageHistoryList( $navLinks = '' ) {
1110                 return "</table>\n$navLinks\n</div>\n";
1111         }
1112
1113         /**
1114          * @param $iscur
1115          * @param $file File
1116          * @return string
1117          */
1118         public function imageHistoryLine( $iscur, $file ) {
1119                 global $wgContLang;
1120
1121                 $user = $this->getUser();
1122                 $lang = $this->getLanguage();
1123                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1124                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1125                 $userId = $file->getUser( 'id' );
1126                 $userText = $file->getUser( 'text' );
1127                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1128
1129                 $local = $this->current->isLocal();
1130                 $row = $selected = '';
1131
1132                 // Deletion link
1133                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1134                         $row .= '<td>';
1135                         # Link to remove from history
1136                         if ( $user->isAllowed( 'delete' ) ) {
1137                                 $q = array( 'action' => 'delete' );
1138                                 if ( !$iscur ) {
1139                                         $q['oldimage'] = $img;
1140                                 }
1141                                 $row .= Linker::linkKnown(
1142                                         $this->title,
1143                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1144                                         array(), $q
1145                                 );
1146                         }
1147                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1148                         $canHide = $user->isAllowed( 'deleterevision' );
1149                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1150                                 if ( $user->isAllowed( 'delete' ) ) {
1151                                         $row .= '<br />';
1152                                 }
1153                                 // If file is top revision or locked from this user, don't link
1154                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1155                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1156                                 } else {
1157                                         list( $ts, ) = explode( '!', $img, 2 );
1158                                         $query = array(
1159                                                 'type' => 'oldimage',
1160                                                 'target' => $this->title->getPrefixedText(),
1161                                                 'ids' => $ts,
1162                                         );
1163                                         $del = Linker::revDeleteLink( $query,
1164                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1165                                 }
1166                                 $row .= $del;
1167                         }
1168                         $row .= '</td>';
1169                 }
1170
1171                 // Reversion link/current indicator
1172                 $row .= '<td>';
1173                 if ( $iscur ) {
1174                         $row .= $this->msg( 'filehist-current' )->escaped();
1175                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1176                         && $this->title->quickUserCan( 'upload', $user )
1177                 ) {
1178                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1179                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1180                         } else {
1181                                 $row .= Linker::linkKnown(
1182                                         $this->title,
1183                                         $this->msg( 'filehist-revert' )->escaped(),
1184                                         array(),
1185                                         array(
1186                                                 'action' => 'revert',
1187                                                 'oldimage' => $img,
1188                                                 'wpEditToken' => $user->getEditToken( $img )
1189                                         )
1190                                 );
1191                         }
1192                 }
1193                 $row .= '</td>';
1194
1195                 // Date/time and image link
1196                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1197                         $selected = "class='filehistory-selected'";
1198                 }
1199                 $row .= "<td $selected style='white-space: nowrap;'>";
1200                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1201                         # Don't link to unviewable files
1202                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1203                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1204                         if ( $local ) {
1205                                 $this->preventClickjacking();
1206                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1207                                 # Make a link to review the image
1208                                 $url = Linker::linkKnown(
1209                                         $revdel,
1210                                         $lang->userTimeAndDate( $timestamp, $user ),
1211                                         array(),
1212                                         array(
1213                                                 'target' => $this->title->getPrefixedText(),
1214                                                 'file' => $img,
1215                                                 'token' => $user->getEditToken( $img )
1216                                         )
1217                                 );
1218                         } else {
1219                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1220                         }
1221                         $row .= '<span class="history-deleted">' . $url . '</span>';
1222                 } else {
1223                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1224                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1225                 }
1226                 $row .= "</td>";
1227
1228                 // Thumbnail
1229                 if ( $this->showThumb ) {
1230                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1231                 }
1232
1233                 // Image dimensions + size
1234                 $row .= '<td>';
1235                 $row .= htmlspecialchars( $file->getDimensionsString() );
1236                 $row .= $this->msg( 'word-separator' )->plain();
1237                 $row .= '<span style="white-space: nowrap;">';
1238                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1239                 $row .= '</span>';
1240                 $row .= '</td>';
1241
1242                 // Uploading user
1243                 $row .= '<td>';
1244                 // Hide deleted usernames
1245                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1246                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1247                 } else {
1248                         if ( $local ) {
1249                                 $row .= Linker::userLink( $userId, $userText );
1250                                 $row .= $this->msg( 'word-separator' )->plain();
1251                                 $row .= '<span style="white-space: nowrap;">';
1252                                 $row .= Linker::userToolLinks( $userId, $userText );
1253                                 $row .= '</span>';
1254                         } else {
1255                                 $row .= htmlspecialchars( $userText );
1256                         }
1257                 }
1258                 $row .= '</td>';
1259
1260                 // Don't show deleted descriptions
1261                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1262                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1263                 } else {
1264                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1265                 }
1266
1267                 $rowClass = null;
1268                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1269                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1270
1271                 return "<tr{$classAttr}>{$row}</tr>\n";
1272         }
1273
1274         /**
1275          * @param $file File
1276          * @return string
1277          */
1278         protected function getThumbForLine( $file ) {
1279                 $lang = $this->getLanguage();
1280                 $user = $this->getUser();
1281                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1282                         && !$file->isDeleted( File::DELETED_FILE )
1283                 ) {
1284                         $params = array(
1285                                 'width' => '120',
1286                                 'height' => '120',
1287                         );
1288                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1289
1290                         $thumbnail = $file->transform( $params );
1291                         $options = array(
1292                                 'alt' => $this->msg( 'filehist-thumbtext',
1293                                         $lang->userTimeAndDate( $timestamp, $user ),
1294                                         $lang->userDate( $timestamp, $user ),
1295                                         $lang->userTime( $timestamp, $user ) )->text(),
1296                                 'file-link' => true,
1297                         );
1298
1299                         if ( !$thumbnail ) {
1300                                 return $this->msg( 'filehist-nothumb' )->escaped();
1301                         }
1302
1303                         return $thumbnail->toHtml( $options );
1304                 } else {
1305                         return $this->msg( 'filehist-nothumb' )->escaped();
1306                 }
1307         }
1308
1309         /**
1310          * @param $enable bool
1311          */
1312         protected function preventClickjacking( $enable = true ) {
1313                 $this->preventClickjacking = $enable;
1314         }
1315
1316         /**
1317          * @return bool
1318          */
1319         public function getPreventClickjacking() {
1320                 return $this->preventClickjacking;
1321         }
1322 }
1323
1324 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1325         protected $preventClickjacking = false;
1326
1327         /**
1328          * @var File
1329          */
1330         protected $mImg;
1331
1332         /**
1333          * @var Title
1334          */
1335         protected $mTitle;
1336
1337         /**
1338          * @param ImagePage $imagePage
1339          */
1340         function __construct( $imagePage ) {
1341                 parent::__construct( $imagePage->getContext() );
1342                 $this->mImagePage = $imagePage;
1343                 $this->mTitle = clone ( $imagePage->getTitle() );
1344                 $this->mTitle->setFragment( '#filehistory' );
1345                 $this->mImg = null;
1346                 $this->mHist = array();
1347                 $this->mRange = array( 0, 0 ); // display range
1348         }
1349
1350         /**
1351          * @return Title
1352          */
1353         function getTitle() {
1354                 return $this->mTitle;
1355         }
1356
1357         function getQueryInfo() {
1358                 return false;
1359         }
1360
1361         /**
1362          * @return string
1363          */
1364         function getIndexField() {
1365                 return '';
1366         }
1367
1368         /**
1369          * @param $row object
1370          * @return string
1371          */
1372         function formatRow( $row ) {
1373                 return '';
1374         }
1375
1376         /**
1377          * @return string
1378          */
1379         function getBody() {
1380                 $s = '';
1381                 $this->doQuery();
1382                 if ( count( $this->mHist ) ) {
1383                         $list = new ImageHistoryList( $this->mImagePage );
1384                         # Generate prev/next links
1385                         $navLink = $this->getNavigationBar();
1386                         $s = $list->beginImageHistoryList( $navLink );
1387                         // Skip rows there just for paging links
1388                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1389                                 $file = $this->mHist[$i];
1390                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1391                         }
1392                         $s .= $list->endImageHistoryList( $navLink );
1393
1394                         if ( $list->getPreventClickjacking() ) {
1395                                 $this->preventClickjacking();
1396                         }
1397                 }
1398                 return $s;
1399         }
1400
1401         function doQuery() {
1402                 if ( $this->mQueryDone ) {
1403                         return;
1404                 }
1405                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1406                 if ( !$this->mImg->exists() ) {
1407                         return;
1408                 }
1409                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1410                 if ( $this->mIsBackwards ) {
1411                         // Fetch the file history
1412                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1413                         // The current rev may not meet the offset/limit
1414                         $numRows = count( $this->mHist );
1415                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1416                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1417                         }
1418                 } else {
1419                         // The current rev may not meet the offset
1420                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1421                                 $this->mHist[] = $this->mImg;
1422                         }
1423                         // Old image versions (fetch extra row for nav links)
1424                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1425                         // Fetch the file history
1426                         $this->mHist = array_merge( $this->mHist,
1427                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1428                 }
1429                 $numRows = count( $this->mHist ); // Total number of query results
1430                 if ( $numRows ) {
1431                         # Index value of top item in the list
1432                         $firstIndex = $this->mIsBackwards ?
1433                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1434                         # Discard the extra result row if there is one
1435                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1436                                 if ( $this->mIsBackwards ) {
1437                                         # Index value of item past the index
1438                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1439                                         # Index value of bottom item in the list
1440                                         $lastIndex = $this->mHist[1]->getTimestamp();
1441                                         # Display range
1442                                         $this->mRange = array( 1, $numRows - 1 );
1443                                 } else {
1444                                         # Index value of item past the index
1445                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1446                                         # Index value of bottom item in the list
1447                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1448                                         # Display range
1449                                         $this->mRange = array( 0, $numRows - 2 );
1450                                 }
1451                         } else {
1452                                 # Setting indexes to an empty string means that they will be
1453                                 # omitted if they would otherwise appear in URLs. It just so
1454                                 # happens that this  is the right thing to do in the standard
1455                                 # UI, in all the relevant cases.
1456                                 $this->mPastTheEndIndex = '';
1457                                 # Index value of bottom item in the list
1458                                 $lastIndex = $this->mIsBackwards ?
1459                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1460                                 # Display range
1461                                 $this->mRange = array( 0, $numRows - 1 );
1462                         }
1463                 } else {
1464                         $firstIndex = '';
1465                         $lastIndex = '';
1466                         $this->mPastTheEndIndex = '';
1467                 }
1468                 if ( $this->mIsBackwards ) {
1469                         $this->mIsFirst = ( $numRows < $queryLimit );
1470                         $this->mIsLast = ( $this->mOffset == '' );
1471                         $this->mLastShown = $firstIndex;
1472                         $this->mFirstShown = $lastIndex;
1473                 } else {
1474                         $this->mIsFirst = ( $this->mOffset == '' );
1475                         $this->mIsLast = ( $numRows < $queryLimit );
1476                         $this->mLastShown = $lastIndex;
1477                         $this->mFirstShown = $firstIndex;
1478                 }
1479                 $this->mQueryDone = true;
1480         }
1481
1482         /**
1483          * @param $enable bool
1484          */
1485         protected function preventClickjacking( $enable = true ) {
1486                 $this->preventClickjacking = $enable;
1487         }
1488
1489         /**
1490          * @return bool
1491          */
1492         public function getPreventClickjacking() {
1493                 return $this->preventClickjacking;
1494         }
1495
1496 }