includes/ImagePage.php

   1 <?php
   2 /**
   3  */
   4
   5 /**
   6  *
   7  */
   8 if( !defined( 'MEDIAWIKI' ) )
   9         die( 1 );
  10
  11 /**
  12  * Special handling for image description pages
  13  *
  14  * @addtogroup Media
  15  */
  16 class ImagePage extends Article {
  17
  18         /* private */ var $img;  // Image object this page is shown for
  19         /* private */ var $repo;
  20         var $mExtraDescription = false;
  21
  22         function __construct( $title, $time = false ) {
  23                 parent::__construct( $title );
  24                 $this->img = wfFindFile( $this->mTitle, $time );
  25                 if ( !$this->img ) {
  26                         $this->img = wfLocalFile( $this->mTitle );
  27                         $this->current = $this->img;
  28                 } else {
  29                         $this->current = $time ? wfLocalFile( $this->mTitle ) : $this->img;
  30                 }
  31                 $this->repo = $this->img->repo;
  32         }
  33
  34         /**
  35          * Handler for action=render
  36          * Include body text only; none of the image extras
  37          */
  38         function render() {
  39                 global $wgOut;
  40                 $wgOut->setArticleBodyOnly( true );
  41                 parent::view();
  42         }
  43
  44         function view() {
  45                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  46
  47                 if ( $this->img->getRedirected() )
  48                         return Article::view();
  49
  50                 $diff = $wgRequest->getVal( 'diff' );
  51                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  52
  53                 if ( $this->mTitle->getNamespace() != NS_IMAGE || ( isset( $diff ) && $diffOnly ) )
  54                         return Article::view();
  55
  56                 if ($wgShowEXIF && $this->img->exists()) {
  57                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  58                         $formattedMetadata = $this->img->formatMetadata();
  59                         $showmeta = $formattedMetadata !== false;
  60                 } else {
  61                         $showmeta = false;
  62                 }
  63
  64                 if ($this->img->exists())
  65                         $wgOut->addHTML($this->showTOC($showmeta));
  66
  67                 $this->openShowImage();
  68
  69                 # No need to display noarticletext, we use our own message, output in openShowImage()
  70                 if ( $this->getID() ) {
  71                         Article::view();
  72                 } else {
  73                         # Just need to set the right headers
  74                         $wgOut->setArticleFlag( true );
  75                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
  76                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  77                         $this->viewUpdates();
  78                 }
  79
  80                 # Show shared description, if needed
  81                 if ( $this->mExtraDescription ) {
  82                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
  83                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
  84                                 $wgOut->addWikiText( $fol );
  85                         }
  86                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
  87                 } else {
  88                         $this->checkSharedConflict();
  89                 }
  90
  91                 $this->closeShowImage();
  92                 $this->imageHistory();
  93                 $this->imageLinks();
  94
  95                 if ( $showmeta ) {
  96                         global $wgStylePath, $wgStyleVersion;
  97                         $expand = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-expand' ) ) );
  98                         $collapse = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-collapse' ) ) );
  99                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
 100                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 101                         $wgOut->addHTML(
 102                                 "<script type=\"text/javascript\" src=\"$wgStylePath/common/metadata.js?$wgStyleVersion\"></script>\n" .
 103                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 104                 }
 105         }
 106
 107         public function getRedirectTarget() {
 108                 if ( $this->img->isLocal() )
 109                         return parent::getRedirectTarget();
 110
 111                 // Foreign image page
 112                 $from = $this->img->getRedirected();
 113                 return $this->mRedirectTarget = Title::makeTitle( NS_IMAGE, $from );
 114         }
 115         public function followRedirect() {
 116                 if ( $this->img->isLocal() )
 117                         return parent::followRedirect();
 118
 119                 $from = $this->img->getRedirected();
 120                 return Title::makeTitle( NS_IMAGE, $from );
 121         }
 122
 123         /**
 124          * Create the TOC
 125          *
 126          * @access private
 127          *
 128          * @param bool $metadata Whether or not to show the metadata link
 129          * @return string
 130          */
 131         function showTOC( $metadata ) {
 132                 global $wgLang;
 133                 $r = '<ul id="filetoc">
 134                         <li><a href="#file">' . $wgLang->getNsText( NS_IMAGE ) . '</a></li>
 135                         <li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>
 136                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 137                         ($metadata ? ' <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 138                 </ul>';
 139                 return $r;
 140         }
 141
 142         /**
 143          * Make a table with metadata to be shown in the output page.
 144          *
 145          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 146          *
 147          * @access private
 148          *
 149          * @param array $exif The array containing the EXIF data
 150          * @return string
 151          */
 152         function makeMetadataTable( $metadata ) {
 153                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 154                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 155                 foreach ( $metadata as $type => $stuff ) {
 156                         foreach ( $stuff as $v ) {
 157                                 $class = Sanitizer::escapeId( $v['id'] );
 158                                 if( $type == 'collapsed' ) {
 159                                         $class .= ' collapsable';
 160                                 }
 161                                 $r .= "|- class=\"$class\"\n";
 162                                 $r .= "!| {$v['name']}\n";
 163                                 $r .= "|| {$v['value']}\n";
 164                         }
 165                 }
 166                 $r .= '|}';
 167                 return $r;
 168         }
 169
 170         /**
 171          * Overloading Article's getContent method.
 172          *
 173          * Omit noarticletext if sharedupload; text will be fetched from the
 174          * shared upload server if possible.
 175          */
 176         function getContent() {
 177                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 178                         return '';
 179                 }
 180                 return Article::getContent();
 181         }
 182
 183         function openShowImage() {
 184                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang, $wgContLang;
 185
 186                 $full_url  = $this->img->getURL();
 187                 $linkAttribs = false;
 188                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 189                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 190                         $sizeSel = User::getDefaultOption( 'imagesize' );
 191
 192                         // The user offset might still be incorrect, specially if
 193                         // $wgImageLimits got changed (see bug #8858).
 194                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 195                                 // Default to the first offset in $wgImageLimits
 196                                 $sizeSel = 0;
 197                         }
 198                 }
 199                 $max = $wgImageLimits[$sizeSel];
 200                 $maxWidth = $max[0];
 201                 $maxHeight = $max[1];
 202                 $sk = $wgUser->getSkin();
 203                 $dirmark = $wgContLang->getDirMark();
 204
 205                 if ( $this->img->exists() ) {
 206                         # image
 207                         $page = $wgRequest->getIntOrNull( 'page' );
 208                         if ( is_null( $page ) ) {
 209                                 $params = array();
 210                                 $page = 1;
 211                         } else {
 212                                 $params = array( 'page' => $page );
 213                         }
 214                         $width_orig = $this->img->getWidth();
 215                         $width = $width_orig;
 216                         $height_orig = $this->img->getHeight();
 217                         $height = $height_orig;
 218                         $mime = $this->img->getMimeType();
 219                         $showLink = false;
 220                         $linkAttribs = array( 'href' => $full_url );
 221                         $longDesc = $this->img->getLongDesc();
 222
 223                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) )       ;
 224
 225                         if ( $this->img->allowInlineDisplay() ) {
 226                                 # image
 227
 228                                 # "Download high res version" link below the image
 229                                 #$msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->img->getSize() ), $mime );
 230                                 # We'll show a thumbnail of this image
 231                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 232                                         # Calculate the thumbnail size.
 233                                         # First case, the limiting factor is the width, not the height.
 234                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 235                                                 $height = round( $height * $maxWidth / $width);
 236                                                 $width = $maxWidth;
 237                                                 # Note that $height <= $maxHeight now.
 238                                         } else {
 239                                                 $newwidth = floor( $width * $maxHeight / $height);
 240                                                 $height = round( $height * $newwidth / $width );
 241                                                 $width = $newwidth;
 242                                                 # Note that $height <= $maxHeight now, but might not be identical
 243                                                 # because of rounding.
 244                                         }
 245                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 246                                         $msgsmall = wfMsgExt( 'show-big-image-thumb',
 247                                                 array( 'parseinline' ), $wgLang->formatNum( $width ), $wgLang->formatNum( $height ) );
 248                                 } else {
 249                                         # Image is small enough to show full size on image page
 250                                         $msgbig = htmlspecialchars( $this->img->getName() );
 251                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 252                                 }
 253
 254                                 $params['width'] = $width;
 255                                 $thumbnail = $this->img->transform( $params );
 256
 257                                 $anchorclose = "<br />";
 258                                 if( $this->img->mustRender() ) {
 259                                         $showLink = true;
 260                                 } else {
 261                                         $anchorclose .=
 262                                                 $msgsmall .
 263                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 264                                 }
 265
 266                                 if ( $this->img->isMultipage() ) {
 267                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 268                                 }
 269
 270                                 if ( $thumbnail ) {
 271                                         $options = array(
 272                                                 'alt' => $this->img->getTitle()->getPrefixedText(),
 273                                                 'file-link' => true,
 274                                         );
 275                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 276                                                 $thumbnail->toHtml( $options ) .
 277                                                 $anchorclose . '</div>' );
 278                                 }
 279
 280                                 if ( $this->img->isMultipage() ) {
 281                                         $count = $this->img->pageCount();
 282
 283                                         if ( $page > 1 ) {
 284                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 285                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 286                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 287                                                         array( 'page' => $page - 1 ) );
 288                                         } else {
 289                                                 $thumb1 = '';
 290                                         }
 291
 292                                         if ( $page < $count ) {
 293                                                 $label = wfMsg( 'imgmultipagenext' );
 294                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 295                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 296                                                         array( 'page' => $page + 1 ) );
 297                                         } else {
 298                                                 $thumb2 = '';
 299                                         }
 300
 301                                         global $wgScript;
 302                                         $select = '<form name="pageselector" action="' .
 303                                                 htmlspecialchars( $wgScript ) .
 304                                                 '" method="get" onchange="document.pageselector.submit();">' .
 305                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() );
 306                                         $select .= $wgOut->parse( wfMsg( 'imgmultigotopre' ), false ) .
 307                                                 ' <select id="pageselector" name="page">';
 308                                         for ( $i=1; $i <= $count; $i++ ) {
 309                                                 $select .= Xml::option( $wgLang->formatNum( $i ), $i,
 310                                                         $i == $page );
 311                                         }
 312                                         $select .= '</select>' . $wgOut->parse( wfMsg( 'imgmultigotopost' ), false ) .
 313                                                 '<input type="submit" value="' .
 314                                                 htmlspecialchars( wfMsg( 'imgmultigo' ) ) . '"></form>';
 315
 316                                         $wgOut->addHTML( '</td><td><div class="multipageimagenavbox">' .
 317                                                 "$select<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>" );
 318                                 }
 319                         } else {
 320                                 #if direct link is allowed but it's not a renderable image, show an icon.
 321                                 if ($this->img->isSafeFile()) {
 322                                         $icon= $this->img->iconThumb();
 323
 324                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 325                                         $icon->toHtml( array( 'desc-link' => true ) ) .
 326                                         '</div>' );
 327                                 }
 328
 329                                 $showLink = true;
 330                         }
 331
 332
 333                         if ($showLink) {
 334                                 $filename = wfEscapeWikiText( $this->img->getName() );
 335
 336                                 if (!$this->img->isSafeFile()) {
 337                                         $warning = wfMsgNoTrans( 'mediawarning' );
 338                                         $wgOut->addWikiText( <<<EOT
 339 <div class="fullMedia">
 340 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 341 <span class="fileInfo"> $longDesc</span>
 342 </div>
 343
 344 <div class="mediaWarning">$warning</div>
 345 EOT
 346                                                 );
 347                                 } else {
 348                                         $wgOut->addWikiText( <<<EOT
 349 <div class="fullMedia">
 350 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $longDesc</span>
 351 </div>
 352 EOT
 353                                                 );
 354                                 }
 355                         }
 356
 357                         if(!$this->img->isLocal()) {
 358                                 $this->printSharedImageText();
 359                         }
 360                 } else {
 361                         # Image does not exist
 362
 363                         $title = SpecialPage::getTitleFor( 'Upload' );
 364                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 365                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 366                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 367                 }
 368         }
 369
 370         /**
 371          * Show a notice that the file is from a shared repository
 372          */
 373         function printSharedImageText() {
 374                 global $wgOut, $wgUser;
 375
 376                 $descUrl = $this->img->getDescriptionUrl();
 377                 $descText = $this->img->getDescriptionText();
 378                 $s = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml( 'sharedupload' );
 379                 if ( $descUrl ) {
 380                         $sk = $wgUser->getSkin();
 381                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadwiki-linktext' ) );
 382                         $msg = ( $descText ) ? 'shareduploadwiki-desc' : 'shareduploadwiki';
 383                         $msg = wfMsgExt( $msg, array( 'parseinline', 'replaceafter' ), $link );
 384                         if ( $msg != '-' ) {
 385                                 # Show message only if not voided by local sysops
 386                                 $s .= $msg;
 387                         }
 388                 }
 389                 $s .= "</div>";
 390                 $wgOut->addHTML( $s );
 391
 392                 if ( $descText ) {
 393                         $this->mExtraDescription = $descText;
 394                 }
 395         }
 396
 397         function checkSharedConflict() {
 398                 global $wgOut, $wgUser;
 399                 $repoGroup = RepoGroup::singleton();
 400                 if( !$repoGroup->hasForeignRepos() ) {
 401                         return;
 402                 }
 403                 if( !$this->img->isLocal() ) {
 404                         return;
 405                 }
 406
 407                 $this->dupFile = null;
 408                 $repoGroup->forEachForeignRepo( array( $this, 'checkSharedConflictCallback' ) );
 409
 410                 if( !$this->dupFile )
 411                         return;
 412                 $dupfile = $this->dupFile;
 413                 $same = (
 414                         ($this->img->getSha1() == $dupfile->getSha1()) &&
 415                         ($this->img->getSize() == $dupfile->getSize())
 416                 );
 417
 418                 $sk = $wgUser->getSkin();
 419                 $descUrl = $dupfile->getDescriptionUrl();
 420                 if( $same ) {
 421                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadduplicate-linktext' ) );
 422                         $wgOut->addHTML( '<div id="shared-image-dup">' . wfMsgWikiHtml( 'shareduploadduplicate', $link ) . '</div>' );
 423                 } else {
 424                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadconflict-linktext' ) );
 425                         $wgOut->addHTML( '<div id="shared-image-conflict">' . wfMsgWikiHtml( 'shareduploadconflict', $link ) . '</div>' );
 426                 }
 427         }
 428
 429         function checkSharedConflictCallback( $repo ) {
 430                 $dupfile = $repo->newFile( $this->img->getTitle() );
 431                 if( $dupfile->exists() )
 432                         $this->dupFile = $dupfile;
 433                 return $dupfile->exists();
 434         }
 435
 436         function getUploadUrl() {
 437                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 438                 return $uploadTitle->getFullUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 439         }
 440
 441         /**
 442          * Print out the various links at the bottom of the image page, e.g. reupload,
 443          * external editing (and instructions link) etc.
 444          */
 445         function uploadLinksBox() {
 446                 global $wgUser, $wgOut;
 447
 448                 if( !$this->img->isLocal() )
 449                         return;
 450
 451                 $sk = $wgUser->getSkin();
 452
 453                 $wgOut->addHtml( '<br /><ul>' );
 454
 455                 # "Upload a new version of this file" link
 456                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 457                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 458                         $wgOut->addHtml( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 459                 }
 460
 461                 # Link to Special:FileDuplicateSearch
 462                 $dupeLink = $sk->makeKnownLinkObj( SpecialPage::getTitleFor( 'FileDuplicateSearch', $this->mTitle->getDBkey() ), wfMsgHtml( 'imagepage-searchdupe' ) );
 463                 $wgOut->addHtml( "<li>{$dupeLink}</li>" );
 464
 465                 # External editing link
 466                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 467                 $wgOut->addHtml( '<li>' . $elink . '<div>' . wfMsgWikiHtml( 'edit-externally-help' ) . '</div></li>' );
 468
 469                 $wgOut->addHtml( '</ul>' );
 470         }
 471
 472         function closeShowImage()
 473         {
 474                 # For overloading
 475
 476         }
 477
 478         /**
 479          * If the page we've just displayed is in the "Image" namespace,
 480          * we follow it with an upload history of the image and its usage.
 481          */
 482         function imageHistory()
 483         {
 484                 global $wgUser, $wgOut, $wgUseExternalEditor;
 485
 486                 $sk = $wgUser->getSkin();
 487
 488                 if ( $this->img->exists() ) {
 489                         $list = new ImageHistoryList( $sk, $this->current );
 490                         $file = $this->current;
 491                         $dims = $file->getDimensionsString();
 492                         $s = $list->beginImageHistoryList() .
 493                                 $list->imageHistoryLine( true, $file );
 494                         // old image versions
 495                         $hist = $this->img->getHistory();
 496                         foreach( $hist as $file ) {
 497                                 $dims = $file->getDimensionsString();
 498                                 $s .= $list->imageHistoryLine( false, $file );
 499                         }
 500                         $s .= $list->endImageHistoryList();
 501                 } else { $s=''; }
 502                 $wgOut->addHTML( $s );
 503
 504                 $this->img->resetHistory();     // free db resources
 505
 506                 # Exist check because we don't want to show this on pages where an image
 507                 # doesn't exist along with the noimage message, that would suck. -ævar
 508                 if( $wgUseExternalEditor && $this->img->exists() ) {
 509                         $this->uploadLinksBox();
 510                 }
 511
 512         }
 513
 514         function imageLinks()
 515         {
 516                 global $wgUser, $wgOut;
 517
 518                 $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'filelinks' ), wfMsg( 'imagelinks' ) ) . "\n" );
 519
 520                 $dbr = wfGetDB( DB_SLAVE );
 521                 $page = $dbr->tableName( 'page' );
 522                 $imagelinks = $dbr->tableName( 'imagelinks' );
 523
 524                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 525                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id";
 526                 $sql = $dbr->limitResult($sql, 500, 0);
 527                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 528
 529                 if ( 0 == $dbr->numRows( $res ) ) {
 530                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 531                         return;
 532                 }
 533                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 534
 535                 $sk = $wgUser->getSkin();
 536                 while ( $s = $dbr->fetchObject( $res ) ) {
 537                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 538                         $link = $sk->makeKnownLinkObj( $name, "" );
 539                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 540                 }
 541                 $wgOut->addHTML( "</ul>\n" );
 542         }
 543
 544         /**
 545          * Delete the file, or an earlier version of it
 546          */
 547         public function delete() {
 548                 if( !$this->img->exists() || !$this->img->isLocal() ) {
 549                         // Standard article deletion
 550                         Article::delete();
 551                         return;
 552                 }
 553                 $deleter = new FileDeleteForm( $this->img );
 554                 $deleter->execute();
 555         }
 556
 557         /**
 558          * Revert the file to an earlier version
 559          */
 560         public function revert() {
 561                 $reverter = new FileRevertForm( $this->img );
 562                 $reverter->execute();
 563         }
 564
 565         /**
 566          * Override handling of action=purge
 567          */
 568         function doPurge() {
 569                 if( $this->img->exists() ) {
 570                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 571                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 572                         $update->doUpdate();
 573                         $this->img->upgradeRow();
 574                         $this->img->purgeCache();
 575                 } else {
 576                         wfDebug( "ImagePage::doPurge no image\n" );
 577                 }
 578                 parent::doPurge();
 579         }
 580
 581         /**
 582          * Display an error with a wikitext description
 583          */
 584         function showError( $description ) {
 585                 global $wgOut;
 586                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 587                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 588                 $wgOut->setArticleRelated( false );
 589                 $wgOut->enableClientCache( false );
 590                 $wgOut->addWikiText( $description );
 591         }
 592
 593 }
 594
 595 /**
 596  * Builds the image revision log shown on image pages
 597  *
 598  * @addtogroup Media
 599  */
 600 class ImageHistoryList {
 601
 602         protected $img, $skin, $title, $repo;
 603
 604         public function __construct( $skin, $img ) {
 605                 $this->skin = $skin;
 606                 $this->img = $img;
 607                 $this->title = $img->getTitle();
 608         }
 609
 610         public function beginImageHistoryList() {
 611                 global $wgOut, $wgUser;
 612                 $deleteColumn = $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deleterevision' );
 613                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) )
 614                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 615                         . Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
 616                         . '<tr><td></td>'
 617                         . ( $this->img->isLocal() && $deleteColumn ? '<td></td>' : '' )
 618                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 619                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 620                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 621                         . '<th class="mw-imagepage-filesize">' . wfMsgHtml( 'filehist-filesize' ) . '</th>'
 622                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 623                         . "</tr>\n";
 624         }
 625
 626         public function endImageHistoryList() {
 627                 return "</table>\n";
 628         }
 629
 630         public function imageHistoryLine( $iscur, $file ) {
 631                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 632
 633                 $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 634                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 635                 $user = $file->getUser('id');
 636                 $usertext = $file->getUser('text');
 637                 $size = $file->getSize();
 638                 $description = $file->getDescription();
 639                 $dims = $file->getDimensionsString();
 640                 $sha1 = $file->getSha1();
 641
 642                 $local = $this->img->isLocal();
 643                 $row = '';
 644
 645                 // Deletion link
 646                 if( $local && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ) {
 647                         $row .= '<td>';
 648                         # Link to remove from history
 649                         if( $wgUser->isAllowed( 'delete' ) ) {
 650                                 $q = array();
 651                                 $q[] = 'action=delete';
 652                                 if( !$iscur )
 653                                         $q[] = 'oldimage=' . urlencode( $img );
 654                                 $row .= $this->skin->makeKnownLinkObj(
 655                                         $this->title,
 656                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 657                                         implode( '&', $q )
 658                                 );
 659                                 $row .= '<br/>';
 660                         }
 661                         # Link to hide content
 662                         if( $wgUser->isAllowed( 'deleterevision' ) ) {
 663                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 664                                 // If file is top revision or locked from this user, don't link
 665                                 if( $iscur || !$file->userCan(File::DELETED_RESTRICTED) ) {
 666                                         $del = wfMsgHtml( 'rev-delundel' );
 667                                 } else {
 668                                         // If the file was hidden, link to sha-1
 669                                         list($ts,$name) = explode('!',$img,2);
 670                                         $del = $this->skin->makeKnownLinkObj( $revdel,  wfMsg( 'rev-delundel' ),
 671                                                 'target=' . urlencode( $wgTitle->getPrefixedText() ) .
 672                                                 '&oldimage=' . urlencode( $ts ) );
 673                                         // Bolden oversighted content
 674                                         if( $file->isDeleted(File::DELETED_RESTRICTED) )
 675                                                 $del = "<strong>$del</strong>";
 676                                 }
 677                                 $row .= "<tt><small>$del</small></tt>";
 678                         }
 679                         $row .= '</td>';
 680                 }
 681
 682                 // Reversion link/current indicator
 683                 $row .= '<td>';
 684                 if( $iscur ) {
 685                         $row .= wfMsgHtml( 'filehist-current' );
 686                 } elseif( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 687                         if( $file->isDeleted(File::DELETED_FILE) ) {
 688                                 $row .= wfMsgHtml('filehist-revert');
 689                         } else {
 690                                 $q = array();
 691                                 $q[] = 'action=revert';
 692                                 $q[] = 'oldimage=' . urlencode( $img );
 693                                 $q[] = 'wpEditToken=' . urlencode( $wgUser->editToken( $img ) );
 694                                 $row .= $this->skin->makeKnownLinkObj( $this->title,
 695                                         wfMsgHtml( 'filehist-revert' ),
 696                                         implode( '&', $q ) );
 697                         }
 698                 }
 699                 $row .= '</td>';
 700
 701                 // Date/time and image link
 702                 $row .= '<td>';
 703                 if( !$file->userCan(File::DELETED_FILE) ) {
 704                         # Don't link to unviewable files
 705                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 706                 } else if( $file->isDeleted(File::DELETED_FILE) ) {
 707                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 708                         # Make a link to review the image
 709                         $url = $this->skin->makeKnownLinkObj( $revdel, $wgLang->timeAndDate( $timestamp, true ),
 710                                 "target=".$wgTitle->getPrefixedText()."&file=$sha1.".$this->img->getExtension() );
 711                         $row .= '<span class="history-deleted">'.$url.'</span>';
 712                 } else {
 713                         $url = $iscur ? $this->img->getUrl() : $this->img->getArchiveUrl( $img );
 714                         $row .= Xml::element( 'a',
 715                                 array( 'href' => $url ),
 716                                 $wgLang->timeAndDate( $timestamp, true ) );
 717                 }
 718
 719                 $row .= '</td>';
 720
 721                 // Uploading user
 722                 $row .= '<td>';
 723                 if( $local ) {
 724                         // Hide deleted usernames
 725                         if( $file->isDeleted(File::DELETED_USER) )
 726                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 727                         else
 728                                 $row .= $this->skin->userLink( $user, $usertext ) .
 729                                         $this->skin->userToolLinks( $user, $usertext );
 730                 } else {
 731                         $row .= htmlspecialchars( $usertext );
 732                 }
 733                 $row .= '</td>';
 734
 735                 // Image dimensions
 736                 $row .= '<td>' . htmlspecialchars( $dims ) . '</td>';
 737
 738                 // File size
 739                 $row .= '<td class="mw-imagepage-filesize">' . $this->skin->formatSize( $size ) . '</td>';
 740
 741                 // Don't show deleted descriptions
 742                 if ( $file->isDeleted(File::DELETED_COMMENT) )
 743                         $row .= '<td><span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span></td>';
 744                 else
 745                         $row .= '<td>' . $this->skin->commentBlock( $description, $this->title ) . '</td>';
 746
 747                 return "<tr>{$row}</tr>\n";
 748         }
 749 }