includes/ImagePage.php

   1 <?php
   2
   3 if( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 /**
   7  * Special handling for image description pages
   8  *
   9  * @ingroup Media
  10  */
  11 class ImagePage extends Article {
  12
  13         /* private */ var $img;  // Image object this page is shown for
  14         /* private */ var $current;
  15         /* private */ var $repo;
  16         /* private */ var $time;
  17         /* private */ var $fileLoaded;
  18         var $mExtraDescription = false;
  19         var $dupes;
  20
  21         function __construct( $title, $time = null ) {
  22                 parent::__construct( $title );
  23
  24                 global $wgRequest;
  25                 $this->time = is_null($time) ? $wgRequest->getVal( 'filetimestamp' ) : $time;
  26                 $this->dupes = null;
  27                 $this->repo = null;
  28         }
  29
  30         protected function loadFile() {
  31                 if( $this->fileLoaded ) {
  32                         return true;
  33                 }
  34                 $this->img = wfFindFile( $this->mTitle, $this->time );
  35                 if ( !$this->img ) {
  36                         $this->img = wfLocalFile( $this->mTitle );
  37                         $this->current = $this->img;
  38                 } else {
  39                         $this->current = $this->time ? wfLocalFile( $this->mTitle ) : $this->img;
  40                 }
  41                 $this->repo = $this->img->getRepo();
  42                 $this->fileLoaded = true;
  43         }
  44
  45         /**
  46          * Handler for action=render
  47          * Include body text only; none of the image extras
  48          */
  49         function render() {
  50                 global $wgOut;
  51                 $wgOut->setArticleBodyOnly( true );
  52                 parent::view();
  53         }
  54
  55         function view() {
  56                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  57                 $this->loadFile();
  58
  59                 if ( $this->mTitle->getNamespace() == NS_IMAGE && $this->img->getRedirected() ) {
  60                         if ( $this->mTitle->getDBkey() == $this->img->getName() ) {
  61                                 // mTitle is the same as the redirect target so ask Article
  62                                 // to perform the redirect for us.
  63                                 return Article::view();
  64                         } else {
  65                                 // mTitle is not the same as the redirect target so it is
  66                                 // probably the redirect page itself. Fake the redirect symbol
  67                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  68                                 $this->viewRedirect( Title::makeTitle( NS_IMAGE, $this->img->getName() ),
  69                                         /* $overwriteSubtitle */ true, /* $forceKnown */ true );
  70                                 $this->viewUpdates();
  71                                 return;
  72                         }
  73                 }
  74
  75                 $diff = $wgRequest->getVal( 'diff' );
  76                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  77
  78                 if ( $this->mTitle->getNamespace() != NS_IMAGE || ( isset( $diff ) && $diffOnly ) )
  79                         return Article::view();
  80
  81                 if ($wgShowEXIF && $this->img->exists()) {
  82                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  83                         $formattedMetadata = $this->img->formatMetadata();
  84                         $showmeta = $formattedMetadata !== false;
  85                 } else {
  86                         $showmeta = false;
  87                 }
  88
  89                 if ($this->img->exists())
  90                         $wgOut->addHTML($this->showTOC($showmeta));
  91
  92                 $this->openShowImage();
  93
  94                 # No need to display noarticletext, we use our own message, output in openShowImage()
  95                 if ( $this->getID() ) {
  96                         Article::view();
  97                 } else {
  98                         # Just need to set the right headers
  99                         $wgOut->setArticleFlag( true );
 100                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 101                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 102                         $this->viewUpdates();
 103                 }
 104
 105                 # Show shared description, if needed
 106                 if ( $this->mExtraDescription ) {
 107                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
 108                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
 109                                 $wgOut->addWikiText( $fol );
 110                         }
 111                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
 112                 } else {
 113                         $this->checkSharedConflict();
 114                 }
 115
 116                 $this->closeShowImage();
 117                 $this->imageHistory();
 118                 // TODO: Cleanup the following
 119
 120                 $wgOut->addHTML( Xml::element( 'h2',
 121                         array( 'id' => 'filelinks' ),
 122                         wfMsg( 'imagelinks' ) ) . "\n" );
 123                 $this->imageDupes();
 124                 // TODO: We may want to find local images redirecting to a foreign
 125                 // file: "The following local files redirect to this file"
 126                 if ( $this->img->isLocal() ) $this->imageRedirects();
 127                 $this->imageLinks();
 128
 129                 if ( $showmeta ) {
 130                         global $wgStylePath, $wgStyleVersion;
 131                         $expand = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-expand' ) ) );
 132                         $collapse = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-collapse' ) ) );
 133                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
 134                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 135                         $wgOut->addScriptFile( 'metadata.js' );
 136                         $wgOut->addHTML(
 137                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 138                 }
 139         }
 140
 141         public function getRedirectTarget() {
 142                 $this->loadFile();
 143                 if ( $this->img->isLocal() ) {
 144                         return parent::getRedirectTarget();
 145                 }
 146                 // Foreign image page
 147                 $from = $this->img->getRedirected();
 148                 $to = $this->img->getName();
 149                 if ( $from == $to ) {
 150                         return null;
 151                 }
 152                 return $this->mRedirectTarget = Title::makeTitle( NS_IMAGE, $to );
 153         }
 154         public function followRedirect() {
 155                 $this->loadFile();
 156                 if ( $this->img->isLocal() ) {
 157                         return parent::followRedirect();
 158                 }
 159                 $from = $this->img->getRedirected();
 160                 $to = $this->img->getName();
 161                 if ( $from == $to ) {
 162                         return false;
 163                 }
 164                 return Title::makeTitle( NS_IMAGE, $to );
 165         }
 166         public function isRedirect( $text = false ) {
 167                 $this->loadFile();
 168                 if ( $this->img->isLocal() )
 169                         return parent::isRedirect( $text );
 170
 171                 return (bool)$this->img->getRedirected();
 172         }
 173
 174         public function isLocal() {
 175                 $this->loadFile();
 176                 return $this->img->isLocal();
 177         }
 178
 179         public function getFile() {
 180                 $this->loadFile();
 181                 return $this->img;
 182         }
 183
 184         public function getDuplicates() {
 185                 $this->loadFile();
 186                 if ( !is_null($this->dupes) ) {
 187                         return $this->dupes;
 188                 }
 189                 if ( !( $hash = $this->img->getSha1() ) ) {
 190                         return $this->dupes = array();
 191                 }
 192                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 193                 // Remove duplicates with self and non matching file sizes
 194                 $self = $this->img->getRepoName().':'.$this->img->getName();
 195                 $size = $this->img->getSize();
 196                 foreach ( $dupes as $index => $file ) {
 197                         $key = $file->getRepoName().':'.$file->getName();
 198                         if ( $key == $self )
 199                                 unset( $dupes[$index] );
 200                         if ( $file->getSize() != $size )
 201                                 unset( $dupes[$index] );
 202                 }
 203                 return $this->dupes = $dupes;
 204
 205         }
 206
 207
 208         /**
 209          * Create the TOC
 210          *
 211          * @access private
 212          *
 213          * @param bool $metadata Whether or not to show the metadata link
 214          * @return string
 215          */
 216         function showTOC( $metadata ) {
 217                 global $wgLang;
 218                 $r = '<ul id="filetoc">
 219                         <li><a href="#file">' . $wgLang->getNsText( NS_IMAGE ) . '</a></li>
 220                         <li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>
 221                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 222                         ($metadata ? ' <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 223                 </ul>';
 224                 return $r;
 225         }
 226
 227         /**
 228          * Make a table with metadata to be shown in the output page.
 229          *
 230          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 231          *
 232          * @access private
 233          *
 234          * @param array $exif The array containing the EXIF data
 235          * @return string
 236          */
 237         function makeMetadataTable( $metadata ) {
 238                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 239                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 240                 foreach ( $metadata as $type => $stuff ) {
 241                         foreach ( $stuff as $v ) {
 242                                 $class = Sanitizer::escapeId( $v['id'] );
 243                                 if( $type == 'collapsed' ) {
 244                                         $class .= ' collapsable';
 245                                 }
 246                                 $r .= "|- class=\"$class\"\n";
 247                                 $r .= "!| {$v['name']}\n";
 248                                 $r .= "|| {$v['value']}\n";
 249                         }
 250                 }
 251                 $r .= '|}';
 252                 return $r;
 253         }
 254
 255         /**
 256          * Overloading Article's getContent method.
 257          *
 258          * Omit noarticletext if sharedupload; text will be fetched from the
 259          * shared upload server if possible.
 260          */
 261         function getContent() {
 262                 $this->loadFile();
 263                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 264                         return '';
 265                 }
 266                 return Article::getContent();
 267         }
 268
 269         function openShowImage() {
 270                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang, $wgContLang;
 271
 272                 $this->loadFile();
 273
 274                 $full_url  = $this->img->getURL();
 275                 $linkAttribs = false;
 276                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 277                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 278                         $sizeSel = User::getDefaultOption( 'imagesize' );
 279
 280                         // The user offset might still be incorrect, specially if
 281                         // $wgImageLimits got changed (see bug #8858).
 282                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 283                                 // Default to the first offset in $wgImageLimits
 284                                 $sizeSel = 0;
 285                         }
 286                 }
 287                 $max = $wgImageLimits[$sizeSel];
 288                 $maxWidth = $max[0];
 289                 $maxHeight = $max[1];
 290                 $sk = $wgUser->getSkin();
 291                 $dirmark = $wgContLang->getDirMark();
 292
 293                 if ( $this->img->exists() ) {
 294                         # image
 295                         $page = $wgRequest->getIntOrNull( 'page' );
 296                         if ( is_null( $page ) ) {
 297                                 $params = array();
 298                                 $page = 1;
 299                         } else {
 300                                 $params = array( 'page' => $page );
 301                         }
 302                         $width_orig = $this->img->getWidth();
 303                         $width = $width_orig;
 304                         $height_orig = $this->img->getHeight();
 305                         $height = $height_orig;
 306                         $mime = $this->img->getMimeType();
 307                         $showLink = false;
 308                         $linkAttribs = array( 'href' => $full_url );
 309                         $longDesc = $this->img->getLongDesc();
 310
 311                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) )       ;
 312
 313                         if ( $this->img->allowInlineDisplay() ) {
 314                                 # image
 315
 316                                 # "Download high res version" link below the image
 317                                 #$msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->img->getSize() ), $mime );
 318                                 # We'll show a thumbnail of this image
 319                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 320                                         # Calculate the thumbnail size.
 321                                         # First case, the limiting factor is the width, not the height.
 322                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 323                                                 $height = round( $height * $maxWidth / $width);
 324                                                 $width = $maxWidth;
 325                                                 # Note that $height <= $maxHeight now.
 326                                         } else {
 327                                                 $newwidth = floor( $width * $maxHeight / $height);
 328                                                 $height = round( $height * $newwidth / $width );
 329                                                 $width = $newwidth;
 330                                                 # Note that $height <= $maxHeight now, but might not be identical
 331                                                 # because of rounding.
 332                                         }
 333                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 334                                         $msgsmall = wfMsgExt( 'show-big-image-thumb',
 335                                                 array( 'parseinline' ), $wgLang->formatNum( $width ), $wgLang->formatNum( $height ) );
 336                                 } else {
 337                                         # Image is small enough to show full size on image page
 338                                         $msgbig = htmlspecialchars( $this->img->getName() );
 339                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 340                                 }
 341
 342                                 $params['width'] = $width;
 343                                 $thumbnail = $this->img->transform( $params );
 344
 345                                 $anchorclose = "<br />";
 346                                 if( $this->img->mustRender() ) {
 347                                         $showLink = true;
 348                                 } else {
 349                                         $anchorclose .=
 350                                                 $msgsmall .
 351                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 352                                 }
 353
 354                                 if ( $this->img->isMultipage() ) {
 355                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 356                                 }
 357
 358                                 if ( $thumbnail ) {
 359                                         $options = array(
 360                                                 'alt' => $this->img->getTitle()->getPrefixedText(),
 361                                                 'file-link' => true,
 362                                         );
 363                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 364                                                 $thumbnail->toHtml( $options ) .
 365                                                 $anchorclose . '</div>' );
 366                                 }
 367
 368                                 if ( $this->img->isMultipage() ) {
 369                                         $count = $this->img->pageCount();
 370
 371                                         if ( $page > 1 ) {
 372                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 373                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 374                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 375                                                         array( 'page' => $page - 1 ) );
 376                                         } else {
 377                                                 $thumb1 = '';
 378                                         }
 379
 380                                         if ( $page < $count ) {
 381                                                 $label = wfMsg( 'imgmultipagenext' );
 382                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 383                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 384                                                         array( 'page' => $page + 1 ) );
 385                                         } else {
 386                                                 $thumb2 = '';
 387                                         }
 388
 389                                         global $wgScript;
 390
 391                                         $formParams = array(
 392                                                 'name' => 'pageselector',
 393                                                 'action' => $wgScript,
 394                                                 'onchange' => 'document.pageselector.submit();',
 395                                         );
 396
 397                                         $option = array();
 398                                         for ( $i=1; $i <= $count; $i++ ) {
 399                                                 $options[] = Xml::option( $wgLang->formatNum($i), $i, $i == $page );
 400                                         }
 401                                         $select = Xml::tags( 'select',
 402                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 403                                                 implode( "\n", $options ) );
 404
 405                                         $wgOut->addHTML(
 406                                                 '</td><td><div class="multipageimagenavbox">' .
 407                                                 Xml::openElement( 'form', $formParams ) .
 408                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 409                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 410                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 411                                                 Xml::closeElement( 'form' ) .
 412                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 413                                         );
 414                                 }
 415                         } else {
 416                                 #if direct link is allowed but it's not a renderable image, show an icon.
 417                                 if ($this->img->isSafeFile()) {
 418                                         $icon= $this->img->iconThumb();
 419
 420                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 421                                         $icon->toHtml( array( 'desc-link' => true ) ) .
 422                                         '</div>' );
 423                                 }
 424
 425                                 $showLink = true;
 426                         }
 427
 428
 429                         if ($showLink) {
 430                                 $filename = wfEscapeWikiText( $this->img->getName() );
 431
 432                                 if (!$this->img->isSafeFile()) {
 433                                         $warning = wfMsgNoTrans( 'mediawarning' );
 434                                         $wgOut->addWikiText( <<<EOT
 435 <div class="fullMedia">
 436 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 437 <span class="fileInfo"> $longDesc</span>
 438 </div>
 439
 440 <div class="mediaWarning">$warning</div>
 441 EOT
 442                                                 );
 443                                 } else {
 444                                         $wgOut->addWikiText( <<<EOT
 445 <div class="fullMedia">
 446 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $longDesc</span>
 447 </div>
 448 EOT
 449                                                 );
 450                                 }
 451                         }
 452
 453                         if(!$this->img->isLocal()) {
 454                                 $this->printSharedImageText();
 455                         }
 456                 } else {
 457                         # Image does not exist
 458
 459                         $title = SpecialPage::getTitleFor( 'Upload' );
 460                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 461                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 462                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 463                 }
 464         }
 465
 466         /**
 467          * Show a notice that the file is from a shared repository
 468          */
 469         function printSharedImageText() {
 470                 global $wgOut, $wgUser;
 471
 472                 $this->loadFile();
 473
 474                 $descUrl = $this->img->getDescriptionUrl();
 475                 $descText = $this->img->getDescriptionText();
 476                 $s = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml( 'sharedupload' );
 477                 if ( $descUrl ) {
 478                         $sk = $wgUser->getSkin();
 479                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadwiki-linktext' ) );
 480                         $msg = ( $descText ) ? 'shareduploadwiki-desc' : 'shareduploadwiki';
 481                         $msg = wfMsgExt( $msg, array( 'parseinline', 'replaceafter' ), $link );
 482                         if ( $msg != '-' ) {
 483                                 # Show message only if not voided by local sysops
 484                                 $s .= $msg;
 485                         }
 486                 }
 487                 $s .= "</div>";
 488                 $wgOut->addHTML( $s );
 489
 490                 if ( $descText ) {
 491                         $this->mExtraDescription = $descText;
 492                 }
 493         }
 494
 495         /*
 496          * Check for files with the same name on the foreign repos.
 497          */
 498         function checkSharedConflict() {
 499                 global $wgOut, $wgUser;
 500
 501                 $repoGroup = RepoGroup::singleton();
 502                 if( !$repoGroup->hasForeignRepos() ) {
 503                         return;
 504                 }
 505
 506                 $this->loadFile();
 507                 if( !$this->img->isLocal() ) {
 508                         return;
 509                 }
 510
 511                 $this->dupFile = null;
 512                 $repoGroup->forEachForeignRepo( array( $this, 'checkSharedConflictCallback' ) );
 513
 514                 if( !$this->dupFile )
 515                         return;
 516                 $dupfile = $this->dupFile;
 517                 $same = (
 518                         ($this->img->getSha1() == $dupfile->getSha1()) &&
 519                         ($this->img->getSize() == $dupfile->getSize())
 520                 );
 521
 522                 $sk = $wgUser->getSkin();
 523                 $descUrl = $dupfile->getDescriptionUrl();
 524                 if( $same ) {
 525                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadduplicate-linktext' ) );
 526                         $wgOut->addHTML( '<div id="shared-image-dup">' . wfMsgWikiHtml( 'shareduploadduplicate', $link ) . '</div>' );
 527                 } else {
 528                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadconflict-linktext' ) );
 529                         $wgOut->addHTML( '<div id="shared-image-conflict">' . wfMsgWikiHtml( 'shareduploadconflict', $link ) . '</div>' );
 530                 }
 531         }
 532
 533         function checkSharedConflictCallback( $repo ) {
 534                 $this->loadFile();
 535                 $dupfile = $repo->newFile( $this->img->getTitle() );
 536                 if( $dupfile->exists() ) {
 537                         $this->dupFile = $dupfile;
 538                 }
 539                 return $dupfile->exists();
 540         }
 541
 542         function getUploadUrl() {
 543                 $this->loadFile();
 544                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 545                 return $uploadTitle->getFullUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 546         }
 547
 548         /**
 549          * Print out the various links at the bottom of the image page, e.g. reupload,
 550          * external editing (and instructions link) etc.
 551          */
 552         function uploadLinksBox() {
 553                 global $wgUser, $wgOut;
 554
 555                 $this->loadFile();
 556                 if( !$this->img->isLocal() )
 557                         return;
 558
 559                 $sk = $wgUser->getSkin();
 560
 561                 $wgOut->addHtml( '<br /><ul>' );
 562
 563                 # "Upload a new version of this file" link
 564                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 565                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 566                         $wgOut->addHtml( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 567                 }
 568
 569                 # Link to Special:FileDuplicateSearch
 570                 $dupeLink = $sk->makeKnownLinkObj( SpecialPage::getTitleFor( 'FileDuplicateSearch', $this->mTitle->getDBkey() ), wfMsgHtml( 'imagepage-searchdupe' ) );
 571                 $wgOut->addHtml( "<li>{$dupeLink}</li>" );
 572
 573                 # External editing link
 574                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 575                 $wgOut->addHtml( '<li>' . $elink . '<div>' . wfMsgWikiHtml( 'edit-externally-help' ) . '</div></li>' );
 576
 577                 $wgOut->addHtml( '</ul>' );
 578         }
 579
 580         function closeShowImage()
 581         {
 582                 # For overloading
 583
 584         }
 585
 586         /**
 587          * If the page we've just displayed is in the "Image" namespace,
 588          * we follow it with an upload history of the image and its usage.
 589          */
 590         function imageHistory()
 591         {
 592                 global $wgUser, $wgOut, $wgUseExternalEditor;
 593
 594                 $sk = $wgUser->getSkin();
 595
 596                 $this->loadFile();
 597                 if ( $this->img->exists() ) {
 598                         $list = new ImageHistoryList( $sk, $this->current, $this->img );
 599                         $file = $this->current;
 600                         $dims = $file->getDimensionsString();
 601                         $s = $list->beginImageHistoryList();
 602                         $s .= $list->imageHistoryLine( true, $file );
 603                         // old image versions
 604                         $hist = $this->img->getHistory();
 605                         foreach( $hist as $file ) {
 606                                 $dims = $file->getDimensionsString();
 607                                 $s .= $list->imageHistoryLine( false, $file );
 608                         }
 609                         $s .= $list->endImageHistoryList();
 610                 } else { $s=''; }
 611                 $wgOut->addHTML( $s );
 612
 613                 $this->img->resetHistory();     // free db resources
 614
 615                 # Exist check because we don't want to show this on pages where an image
 616                 # doesn't exist along with the noimage message, that would suck. -ævar
 617                 if( $wgUseExternalEditor && $this->img->exists() ) {
 618                         $this->uploadLinksBox();
 619                 }
 620
 621         }
 622
 623         function imageLinks()
 624         {
 625                 global $wgUser, $wgOut;
 626
 627                 $limit = 100;
 628
 629                 $dbr = wfGetDB( DB_SLAVE );
 630
 631                 $res = $dbr->select(
 632                         array( 'imagelinks', 'page' ),
 633                         array( 'page_namespace', 'page_title' ),
 634                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 635                         __METHOD__,
 636                         array( 'LIMIT' => $limit + 1)
 637                 );
 638
 639                 if ( 0 == $dbr->numRows( $res ) ) {
 640                         $wgOut->addWikiMsg( 'nolinkstoimage' );
 641                         return;
 642                 }
 643                 $wgOut->addWikiMsg( 'linkstoimage' );
 644                 $wgOut->addHTML( "<ul class='mw-imagepage-linktoimage'>\n" );
 645
 646                 $sk = $wgUser->getSkin();
 647                 $count = 0;
 648                 while ( $s = $res->fetchObject() ) {
 649                         $count++;
 650                         if ( $count <= $limit ) {
 651                                 // We have not yet reached the extra one that tells us there is more to fetch
 652                                 $name = Title::makeTitle( $s->page_namespace, $s->page_title );
 653                                 $link = $sk->makeKnownLinkObj( $name, "" );
 654                                 $wgOut->addHTML( "<li>{$link}</li>\n" );
 655                         }
 656                 }
 657                 $wgOut->addHTML( "</ul>\n" );
 658                 $res->free();
 659
 660                 // Add a links to [[Special:Whatlinkshere]]
 661                 if ( $count > $limit )
 662                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 663         }
 664
 665         function imageRedirects()
 666         {
 667                 global $wgUser, $wgOut;
 668
 669                 $redirects = $this->getTitle()->getRedirectsHere( NS_IMAGE );
 670                 if ( count( $redirects ) == 0 ) return;
 671
 672
 673                 $wgOut->addWikiMsg( 'redirectstofile' );
 674                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 675
 676                 $sk = $wgUser->getSkin();
 677                 foreach ( $redirects as $title ) {
 678                         $link = $sk->makeKnownLinkObj( $title, "" );
 679                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 680                 }
 681                 $wgOut->addHTML( "</ul>\n" );
 682
 683         }
 684
 685         function imageDupes() {
 686                 global $wgOut, $wgUser;
 687
 688                 $this->loadFile();
 689
 690                 $dupes = $this->getDuplicates();
 691                 if ( count( $dupes ) == 0 ) return;
 692
 693                 $wgOut->addWikiMsg( 'duplicatesoffile' );
 694                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 695
 696                 $sk = $wgUser->getSkin();
 697                 foreach ( $dupes as $file ) {
 698                         if ( $file->isLocal() )
 699                                 $link = $sk->makeKnownLinkObj( $file->getTitle(), "" );
 700                         else
 701                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 702                                         $file->getTitle()->getPrefixedText() );
 703                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 704                 }
 705                 $wgOut->addHTML( "</ul>\n" );
 706         }
 707
 708         /**
 709          * Delete the file, or an earlier version of it
 710          */
 711         public function delete() {
 712                 $this->loadFile();
 713                 if( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 714                         // Standard article deletion
 715                         Article::delete();
 716                         return;
 717                 }
 718                 $deleter = new FileDeleteForm( $this->img );
 719                 $deleter->execute();
 720         }
 721
 722         /**
 723          * Revert the file to an earlier version
 724          */
 725         public function revert() {
 726                 $this->loadFile();
 727                 $reverter = new FileRevertForm( $this->img );
 728                 $reverter->execute();
 729         }
 730
 731         /**
 732          * Override handling of action=purge
 733          */
 734         function doPurge() {
 735                 $this->loadFile();
 736                 if( $this->img->exists() ) {
 737                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 738                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 739                         $update->doUpdate();
 740                         $this->img->upgradeRow();
 741                         $this->img->purgeCache();
 742                 } else {
 743                         wfDebug( "ImagePage::doPurge no image\n" );
 744                 }
 745                 parent::doPurge();
 746         }
 747
 748         /**
 749          * Display an error with a wikitext description
 750          */
 751         function showError( $description ) {
 752                 global $wgOut;
 753                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 754                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 755                 $wgOut->setArticleRelated( false );
 756                 $wgOut->enableClientCache( false );
 757                 $wgOut->addWikiText( $description );
 758         }
 759
 760 }
 761
 762 /**
 763  * Builds the image revision log shown on image pages
 764  *
 765  * @ingroup Media
 766  */
 767 class ImageHistoryList {
 768
 769         protected $img, $skin, $title, $repo;
 770
 771         public function __construct( $skin, $curimg, $img ) {
 772                 $this->skin = $skin;
 773                 $this->current = $curimg;
 774                 $this->img = $img;
 775                 $this->title = $img->getTitle();
 776         }
 777
 778         public function beginImageHistoryList() {
 779                 global $wgOut, $wgUser;
 780                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) )
 781                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 782                         . Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
 783                         . '<tr><td></td>'
 784                         . ( $this->current->isLocal() && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ? '<td></td>' : '' )
 785                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 786                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 787                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 788                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 789                         . "</tr>\n";
 790         }
 791
 792         public function endImageHistoryList() {
 793                 return "</table>\n";
 794         }
 795
 796         public function imageHistoryLine( $iscur, $file ) {
 797                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 798
 799                 $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 800                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 801                 $user = $file->getUser('id');
 802                 $usertext = $file->getUser('text');
 803                 $size = $file->getSize();
 804                 $description = $file->getDescription();
 805                 $dims = $file->getDimensionsString();
 806                 $sha1 = $file->getSha1();
 807
 808                 $local = $this->current->isLocal();
 809                 $row = $css = $selected = '';
 810
 811                 // Deletion link
 812                 if( $local && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ) {
 813                         $row .= '<td>';
 814                         # Link to remove from history
 815                         if( $wgUser->isAllowed( 'delete' ) ) {
 816                                 $q = array();
 817                                 $q[] = 'action=delete';
 818                                 if( !$iscur )
 819                                         $q[] = 'oldimage=' . urlencode( $img );
 820                                 $row .= $this->skin->makeKnownLinkObj(
 821                                         $this->title,
 822                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 823                                         implode( '&', $q )
 824                                 );
 825                         }
 826                         # Link to hide content
 827                         if( $wgUser->isAllowed( 'deleterevision' ) ) {
 828                                 if( $wgUser->isAllowed('delete') ) {
 829                                         $row .= '<br/>';
 830                                 }
 831                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 832                                 // If file is top revision or locked from this user, don't link
 833                                 if( $iscur || !$file->userCan(File::DELETED_RESTRICTED) ) {
 834                                         $del = wfMsgHtml( 'rev-delundel' );
 835                                 } else {
 836                                         // If the file was hidden, link to sha-1
 837                                         list($ts,$name) = explode('!',$img,2);
 838                                         $del = $this->skin->makeKnownLinkObj( $revdel,  wfMsg( 'rev-delundel' ),
 839                                                 'target=' . urlencode( $wgTitle->getPrefixedText() ) .
 840                                                 '&oldimage=' . urlencode( $ts ) );
 841                                         // Bolden oversighted content
 842                                         if( $file->isDeleted(File::DELETED_RESTRICTED) )
 843                                                 $del = "<strong>$del</strong>";
 844                                 }
 845                                 $row .= "<tt style='white-space: nowrap;'><small>$del</small></tt>";
 846                         }
 847                         $row .= '</td>';
 848                 }
 849
 850                 // Reversion link/current indicator
 851                 $row .= '<td>';
 852                 if( $iscur ) {
 853                         $row .= wfMsgHtml( 'filehist-current' );
 854                 } elseif( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 855                         if( $file->isDeleted(File::DELETED_FILE) ) {
 856                                 $row .= wfMsgHtml('filehist-revert');
 857                         } else {
 858                                 $q = array();
 859                                 $q[] = 'action=revert';
 860                                 $q[] = 'oldimage=' . urlencode( $img );
 861                                 $q[] = 'wpEditToken=' . urlencode( $wgUser->editToken( $img ) );
 862                                 $row .= $this->skin->makeKnownLinkObj( $this->title,
 863                                         wfMsgHtml( 'filehist-revert' ),
 864                                         implode( '&', $q ) );
 865                         }
 866                 }
 867                 $row .= '</td>';
 868
 869                 // Date/time and image link
 870                 if( $file->getTimestamp() === $this->img->getTimestamp() ) {
 871                         $selected = "class='filehistory-selected'";
 872                 }
 873                 $row .= "<td $selected style='white-space: nowrap;'>";
 874                 if( !$file->userCan(File::DELETED_FILE) ) {
 875                         # Don't link to unviewable files
 876                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 877                 } else if( $file->isDeleted(File::DELETED_FILE) ) {
 878                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 879                         # Make a link to review the image
 880                         $url = $this->skin->makeKnownLinkObj( $revdel, $wgLang->timeAndDate( $timestamp, true ),
 881                                 "target=".$wgTitle->getPrefixedText()."&file=$sha1.".$this->current->getExtension() );
 882                         $row .= '<span class="history-deleted">'.$url.'</span>';
 883                 } else {
 884                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 885                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 886                 }
 887
 888                 $row .= "</td><td>";
 889
 890                 // Image dimensions
 891                 $row .= htmlspecialchars( $dims );
 892
 893                 // File size
 894                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $size ) . ')</span>';
 895
 896                 // Uploading user
 897                 $row .= '</td><td>';
 898                 if( $local ) {
 899                         // Hide deleted usernames
 900                         if( $file->isDeleted(File::DELETED_USER) ) {
 901                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 902                         } else {
 903                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 904                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 905                         }
 906                 } else {
 907                         $row .= htmlspecialchars( $usertext );
 908                 }
 909                 $row .= '</td><td>';
 910
 911                 // Don't show deleted descriptions
 912                 if ( $file->isDeleted(File::DELETED_COMMENT) ) {
 913                         $row .= '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 914                 } else {
 915                         $row .= $this->skin->commentBlock( $description, $this->title );
 916                 }
 917                 $row .= '</td>';
 918
 919                 wfRunHooks( 'ImagePageFileHistoryLine', array( &$file, &$row, &$css ) );
 920                 $trCSS = $css ? " class='$css'" : "";
 921
 922                 return "<tr{$trCSS}>{$row}</tr>\n";
 923         }
 924 }