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->mTitle->getNamespace() == NS_IMAGE && $this->img->getRedirected() ) {
  48                         if ( $this->mTitle->getDBkey() == $this->img->getName() ) {
  49                                 // mTitle is the same as the redirect target so ask Article
  50                                 // to perform the redirect for us.
  51                                 return Article::view();
  52                         } else {
  53                                 // mTitle is not the same as the redirect target so it is
  54                                 // probably the redirect page itself. Fake the redirect symbol
  55                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  56                                 $this->viewRedirect( Title::makeTitle( NS_IMAGE, $this->img->getName() ),
  57                                         /* $overwriteSubtitle */ true, /* $forceKnown */ true );
  58                                 $this->viewUpdates();
  59                                 return;
  60                         }
  61                 }
  62
  63                 $diff = $wgRequest->getVal( 'diff' );
  64                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  65
  66                 if ( $this->mTitle->getNamespace() != NS_IMAGE || ( isset( $diff ) && $diffOnly ) )
  67                         return Article::view();
  68
  69                 if ($wgShowEXIF && $this->img->exists()) {
  70                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  71                         $formattedMetadata = $this->img->formatMetadata();
  72                         $showmeta = $formattedMetadata !== false;
  73                 } else {
  74                         $showmeta = false;
  75                 }
  76
  77                 if ($this->img->exists())
  78                         $wgOut->addHTML($this->showTOC($showmeta));
  79
  80                 $this->openShowImage();
  81
  82                 # No need to display noarticletext, we use our own message, output in openShowImage()
  83                 if ( $this->getID() ) {
  84                         Article::view();
  85                 } else {
  86                         # Just need to set the right headers
  87                         $wgOut->setArticleFlag( true );
  88                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
  89                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  90                         $this->viewUpdates();
  91                 }
  92
  93                 # Show shared description, if needed
  94                 if ( $this->mExtraDescription ) {
  95                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
  96                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
  97                                 $wgOut->addWikiText( $fol );
  98                         }
  99                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
 100                 } else {
 101                         $this->checkSharedConflict();
 102                 }
 103
 104                 $this->closeShowImage();
 105                 $this->imageHistory();
 106                 // TODO: Cleanup the following
 107                 $this->imageLinks();
 108                 $this->imageDupes();
 109                 // TODO: We may want to find local images redirecting to a foreign
 110                 // file: "The following local files redirect to this file"
 111                 if ( $this->img->isLocal() ) $this->imageRedirects();
 112
 113                 if ( $showmeta ) {
 114                         global $wgStylePath, $wgStyleVersion;
 115                         $expand = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-expand' ) ) );
 116                         $collapse = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-collapse' ) ) );
 117                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
 118                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 119                         $wgOut->addScriptFile( 'metadata.js' );
 120                         $wgOut->addHTML(
 121                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 122                 }
 123         }
 124
 125         public function getRedirectTarget() {
 126                 if ( $this->img->isLocal() )
 127                         return parent::getRedirectTarget();
 128
 129                 // Foreign image page
 130                 $from = $this->img->getRedirected();
 131                 $to = $this->img->getName();
 132                 if ($from == $to) return null;
 133                 return $this->mRedirectTarget = Title::makeTitle( NS_IMAGE, $to );
 134         }
 135         public function followRedirect() {
 136                 if ( $this->img->isLocal() )
 137                         return parent::followRedirect();
 138
 139                 $from = $this->img->getRedirected();
 140                 $to = $this->img->getName();
 141                 if ($from == $to) return false;
 142                 return Title::makeTitle( NS_IMAGE, $to );
 143         }
 144         public function isRedirect( $text = false ) {
 145                 if ( $this->img->isLocal() )
 146                         return parent::isRedirect( $text );
 147
 148                 return (bool)$this->img->getRedirected();
 149         }
 150
 151         public function isLocal() {
 152                 return $this->img->isLocal();
 153         }
 154
 155         public function getFile() {
 156                 return $this->img;
 157         }
 158
 159         /**
 160          * Create the TOC
 161          *
 162          * @access private
 163          *
 164          * @param bool $metadata Whether or not to show the metadata link
 165          * @return string
 166          */
 167         function showTOC( $metadata ) {
 168                 global $wgLang;
 169                 $r = '<ul id="filetoc">
 170                         <li><a href="#file">' . $wgLang->getNsText( NS_IMAGE ) . '</a></li>
 171                         <li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>
 172                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 173                         ($metadata ? ' <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 174                 </ul>';
 175                 return $r;
 176         }
 177
 178         /**
 179          * Make a table with metadata to be shown in the output page.
 180          *
 181          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 182          *
 183          * @access private
 184          *
 185          * @param array $exif The array containing the EXIF data
 186          * @return string
 187          */
 188         function makeMetadataTable( $metadata ) {
 189                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 190                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 191                 foreach ( $metadata as $type => $stuff ) {
 192                         foreach ( $stuff as $v ) {
 193                                 $class = Sanitizer::escapeId( $v['id'] );
 194                                 if( $type == 'collapsed' ) {
 195                                         $class .= ' collapsable';
 196                                 }
 197                                 $r .= "|- class=\"$class\"\n";
 198                                 $r .= "!| {$v['name']}\n";
 199                                 $r .= "|| {$v['value']}\n";
 200                         }
 201                 }
 202                 $r .= '|}';
 203                 return $r;
 204         }
 205
 206         /**
 207          * Overloading Article's getContent method.
 208          *
 209          * Omit noarticletext if sharedupload; text will be fetched from the
 210          * shared upload server if possible.
 211          */
 212         function getContent() {
 213                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 214                         return '';
 215                 }
 216                 return Article::getContent();
 217         }
 218
 219         function openShowImage() {
 220                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang, $wgContLang;
 221
 222                 $full_url  = $this->img->getURL();
 223                 $linkAttribs = false;
 224                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 225                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 226                         $sizeSel = User::getDefaultOption( 'imagesize' );
 227
 228                         // The user offset might still be incorrect, specially if
 229                         // $wgImageLimits got changed (see bug #8858).
 230                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 231                                 // Default to the first offset in $wgImageLimits
 232                                 $sizeSel = 0;
 233                         }
 234                 }
 235                 $max = $wgImageLimits[$sizeSel];
 236                 $maxWidth = $max[0];
 237                 $maxHeight = $max[1];
 238                 $sk = $wgUser->getSkin();
 239                 $dirmark = $wgContLang->getDirMark();
 240
 241                 if ( $this->img->exists() ) {
 242                         # image
 243                         $page = $wgRequest->getIntOrNull( 'page' );
 244                         if ( is_null( $page ) ) {
 245                                 $params = array();
 246                                 $page = 1;
 247                         } else {
 248                                 $params = array( 'page' => $page );
 249                         }
 250                         $width_orig = $this->img->getWidth();
 251                         $width = $width_orig;
 252                         $height_orig = $this->img->getHeight();
 253                         $height = $height_orig;
 254                         $mime = $this->img->getMimeType();
 255                         $showLink = false;
 256                         $linkAttribs = array( 'href' => $full_url );
 257                         $longDesc = $this->img->getLongDesc();
 258
 259                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) )       ;
 260
 261                         if ( $this->img->allowInlineDisplay() ) {
 262                                 # image
 263
 264                                 # "Download high res version" link below the image
 265                                 #$msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->img->getSize() ), $mime );
 266                                 # We'll show a thumbnail of this image
 267                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 268                                         # Calculate the thumbnail size.
 269                                         # First case, the limiting factor is the width, not the height.
 270                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 271                                                 $height = round( $height * $maxWidth / $width);
 272                                                 $width = $maxWidth;
 273                                                 # Note that $height <= $maxHeight now.
 274                                         } else {
 275                                                 $newwidth = floor( $width * $maxHeight / $height);
 276                                                 $height = round( $height * $newwidth / $width );
 277                                                 $width = $newwidth;
 278                                                 # Note that $height <= $maxHeight now, but might not be identical
 279                                                 # because of rounding.
 280                                         }
 281                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 282                                         $msgsmall = wfMsgExt( 'show-big-image-thumb',
 283                                                 array( 'parseinline' ), $wgLang->formatNum( $width ), $wgLang->formatNum( $height ) );
 284                                 } else {
 285                                         # Image is small enough to show full size on image page
 286                                         $msgbig = htmlspecialchars( $this->img->getName() );
 287                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 288                                 }
 289
 290                                 $params['width'] = $width;
 291                                 $thumbnail = $this->img->transform( $params );
 292
 293                                 $anchorclose = "<br />";
 294                                 if( $this->img->mustRender() ) {
 295                                         $showLink = true;
 296                                 } else {
 297                                         $anchorclose .=
 298                                                 $msgsmall .
 299                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 300                                 }
 301
 302                                 if ( $this->img->isMultipage() ) {
 303                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 304                                 }
 305
 306                                 if ( $thumbnail ) {
 307                                         $options = array(
 308                                                 'alt' => $this->img->getTitle()->getPrefixedText(),
 309                                                 'file-link' => true,
 310                                         );
 311                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 312                                                 $thumbnail->toHtml( $options ) .
 313                                                 $anchorclose . '</div>' );
 314                                 }
 315
 316                                 if ( $this->img->isMultipage() ) {
 317                                         $count = $this->img->pageCount();
 318
 319                                         if ( $page > 1 ) {
 320                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 321                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 322                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 323                                                         array( 'page' => $page - 1 ) );
 324                                         } else {
 325                                                 $thumb1 = '';
 326                                         }
 327
 328                                         if ( $page < $count ) {
 329                                                 $label = wfMsg( 'imgmultipagenext' );
 330                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 331                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 332                                                         array( 'page' => $page + 1 ) );
 333                                         } else {
 334                                                 $thumb2 = '';
 335                                         }
 336
 337                                         global $wgScript;
 338
 339                                         $formParams = array(
 340                                                 'name' => 'pageselector',
 341                                                 'action' => $wgScript,
 342                                                 'onchange' => 'document.pageselector.submit();',
 343                                         );
 344
 345                                         $option = array();
 346                                         for ( $i=1; $i <= $count; $i++ ) {
 347                                                 $options[] = Xml::option( $wgLang->formatNum($i), $i, $i == $page );
 348                                         }
 349                                         $select = Xml::tags( 'select',
 350                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 351                                                 implode( "\n", $options ) );
 352
 353                                         $wgOut->addHTML(
 354                                                 '</td><td><div class="multipageimagenavbox">' .
 355                                                 Xml::openElement( 'form', $formParams ) .
 356                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 357                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 358                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 359                                                 Xml::closeElement( 'form' ) .
 360                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 361                                         );
 362                                 }
 363                         } else {
 364                                 #if direct link is allowed but it's not a renderable image, show an icon.
 365                                 if ($this->img->isSafeFile()) {
 366                                         $icon= $this->img->iconThumb();
 367
 368                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 369                                         $icon->toHtml( array( 'desc-link' => true ) ) .
 370                                         '</div>' );
 371                                 }
 372
 373                                 $showLink = true;
 374                         }
 375
 376
 377                         if ($showLink) {
 378                                 $filename = wfEscapeWikiText( $this->img->getName() );
 379
 380                                 if (!$this->img->isSafeFile()) {
 381                                         $warning = wfMsgNoTrans( 'mediawarning' );
 382                                         $wgOut->addWikiText( <<<EOT
 383 <div class="fullMedia">
 384 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 385 <span class="fileInfo"> $longDesc</span>
 386 </div>
 387
 388 <div class="mediaWarning">$warning</div>
 389 EOT
 390                                                 );
 391                                 } else {
 392                                         $wgOut->addWikiText( <<<EOT
 393 <div class="fullMedia">
 394 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $longDesc</span>
 395 </div>
 396 EOT
 397                                                 );
 398                                 }
 399                         }
 400
 401                         if(!$this->img->isLocal()) {
 402                                 $this->printSharedImageText();
 403                         }
 404                 } else {
 405                         # Image does not exist
 406
 407                         $title = SpecialPage::getTitleFor( 'Upload' );
 408                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 409                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 410                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 411                 }
 412         }
 413
 414         /**
 415          * Show a notice that the file is from a shared repository
 416          */
 417         function printSharedImageText() {
 418                 global $wgOut, $wgUser;
 419
 420                 $descUrl = $this->img->getDescriptionUrl();
 421                 $descText = $this->img->getDescriptionText();
 422                 $s = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml( 'sharedupload' );
 423                 if ( $descUrl ) {
 424                         $sk = $wgUser->getSkin();
 425                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadwiki-linktext' ) );
 426                         $msg = ( $descText ) ? 'shareduploadwiki-desc' : 'shareduploadwiki';
 427                         $msg = wfMsgExt( $msg, array( 'parseinline', 'replaceafter' ), $link );
 428                         if ( $msg != '-' ) {
 429                                 # Show message only if not voided by local sysops
 430                                 $s .= $msg;
 431                         }
 432                 }
 433                 $s .= "</div>";
 434                 $wgOut->addHTML( $s );
 435
 436                 if ( $descText ) {
 437                         $this->mExtraDescription = $descText;
 438                 }
 439         }
 440
 441         function checkSharedConflict() {
 442                 global $wgOut, $wgUser;
 443                 $repoGroup = RepoGroup::singleton();
 444                 if( !$repoGroup->hasForeignRepos() ) {
 445                         return;
 446                 }
 447                 if( !$this->img->isLocal() ) {
 448                         return;
 449                 }
 450
 451                 $this->dupFile = null;
 452                 $repoGroup->forEachForeignRepo( array( $this, 'checkSharedConflictCallback' ) );
 453
 454                 if( !$this->dupFile )
 455                         return;
 456                 $dupfile = $this->dupFile;
 457                 $same = (
 458                         ($this->img->getSha1() == $dupfile->getSha1()) &&
 459                         ($this->img->getSize() == $dupfile->getSize())
 460                 );
 461
 462                 $sk = $wgUser->getSkin();
 463                 $descUrl = $dupfile->getDescriptionUrl();
 464                 if( $same ) {
 465                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadduplicate-linktext' ) );
 466                         $wgOut->addHTML( '<div id="shared-image-dup">' . wfMsgWikiHtml( 'shareduploadduplicate', $link ) . '</div>' );
 467                 } else {
 468                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadconflict-linktext' ) );
 469                         $wgOut->addHTML( '<div id="shared-image-conflict">' . wfMsgWikiHtml( 'shareduploadconflict', $link ) . '</div>' );
 470                 }
 471         }
 472
 473         function checkSharedConflictCallback( $repo ) {
 474                 $dupfile = $repo->newFile( $this->img->getTitle() );
 475                 if( $dupfile->exists() )
 476                         $this->dupFile = $dupfile;
 477                 return $dupfile->exists();
 478         }
 479
 480         function getUploadUrl() {
 481                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 482                 return $uploadTitle->getFullUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 483         }
 484
 485         /**
 486          * Print out the various links at the bottom of the image page, e.g. reupload,
 487          * external editing (and instructions link) etc.
 488          */
 489         function uploadLinksBox() {
 490                 global $wgUser, $wgOut;
 491
 492                 if( !$this->img->isLocal() )
 493                         return;
 494
 495                 $sk = $wgUser->getSkin();
 496
 497                 $wgOut->addHtml( '<br /><ul>' );
 498
 499                 # "Upload a new version of this file" link
 500                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 501                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 502                         $wgOut->addHtml( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 503                 }
 504
 505                 # Link to Special:FileDuplicateSearch
 506                 $dupeLink = $sk->makeKnownLinkObj( SpecialPage::getTitleFor( 'FileDuplicateSearch', $this->mTitle->getDBkey() ), wfMsgHtml( 'imagepage-searchdupe' ) );
 507                 $wgOut->addHtml( "<li>{$dupeLink}</li>" );
 508
 509                 # External editing link
 510                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 511                 $wgOut->addHtml( '<li>' . $elink . '<div>' . wfMsgWikiHtml( 'edit-externally-help' ) . '</div></li>' );
 512
 513                 $wgOut->addHtml( '</ul>' );
 514         }
 515
 516         function closeShowImage()
 517         {
 518                 # For overloading
 519
 520         }
 521
 522         /**
 523          * If the page we've just displayed is in the "Image" namespace,
 524          * we follow it with an upload history of the image and its usage.
 525          */
 526         function imageHistory()
 527         {
 528                 global $wgUser, $wgOut, $wgUseExternalEditor;
 529
 530                 $sk = $wgUser->getSkin();
 531
 532                 if ( $this->img->exists() ) {
 533                         $list = new ImageHistoryList( $sk, $this->current );
 534                         $file = $this->current;
 535                         $dims = $file->getDimensionsString();
 536                         $s = $list->beginImageHistoryList() .
 537                                 $list->imageHistoryLine( true, $file );
 538                         // old image versions
 539                         $hist = $this->img->getHistory();
 540                         foreach( $hist as $file ) {
 541                                 $dims = $file->getDimensionsString();
 542                                 $s .= $list->imageHistoryLine( false, $file );
 543                         }
 544                         $s .= $list->endImageHistoryList();
 545                 } else { $s=''; }
 546                 $wgOut->addHTML( $s );
 547
 548                 $this->img->resetHistory();     // free db resources
 549
 550                 # Exist check because we don't want to show this on pages where an image
 551                 # doesn't exist along with the noimage message, that would suck. -ævar
 552                 if( $wgUseExternalEditor && $this->img->exists() ) {
 553                         $this->uploadLinksBox();
 554                 }
 555
 556         }
 557
 558         function imageLinks()
 559         {
 560                 global $wgUser, $wgOut;
 561
 562                 $limit = 100;
 563
 564                 $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'filelinks' ), wfMsg( 'imagelinks' ) ) . "\n" );
 565
 566                 $dbr = wfGetDB( DB_SLAVE );
 567
 568                 $res = $dbr->select(
 569                         array( 'imagelinks', 'page' ),
 570                         array( 'page_namespace', 'page_title' ),
 571                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 572                         __METHOD__,
 573                         array( 'LIMIT' => $limit + 1)
 574                 );
 575
 576                 if ( 0 == $dbr->numRows( $res ) ) {
 577                         $wgOut->addWikiMsg( 'nolinkstoimage' );
 578                         return;
 579                 }
 580                 $wgOut->addHTML( Xml::element( 'h5', null, wfMsg( 'linkstoimage' ) ) . "\n" );
 581                 $wgOut->addHTML( "<ul class='mw-imagepage-linktoimage'>\n" );
 582
 583                 $sk = $wgUser->getSkin();
 584                 $count = 0;
 585                 while ( $s = $res->fetchObject() ) {
 586                         $count++;
 587                         if ( $count <= $limit ) {
 588                                 // We have not yet reached the extra one that tells us there is more to fetch
 589                                 $name = Title::makeTitle( $s->page_namespace, $s->page_title );
 590                                 $link = $sk->makeKnownLinkObj( $name, "" );
 591                                 $wgOut->addHTML( "<li>{$link}</li>\n" );
 592                         }
 593                 }
 594                 $wgOut->addHTML( "</ul>\n" );
 595                 $res->free();
 596
 597                 // Add a links to [[Special:Whatlinkshere]]
 598                 if ( $count > $limit )
 599                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 600         }
 601
 602         function imageRedirects()
 603         {
 604                 global $wgUser, $wgOut;
 605
 606                 $dbr = wfGetDB( DB_SLAVE );
 607                 $res = $dbr->select(
 608                         array( 'redirect', 'page' ),
 609                         array( 'page_title' ),
 610                         array(
 611                                 'rd_namespace' => NS_IMAGE,
 612                                 'rd_title' => $this->mTitle->getDBkey(),
 613                                 'page_namespace' => NS_IMAGE,
 614                                 'rd_from = page_id'
 615                         ),
 616                         __METHOD__
 617                 );
 618
 619                 if ( 0 == $dbr->numRows( $res ) )
 620                         return;
 621
 622                 $wgOut->addHTML( Xml::element( 'h5', null, wfMsg( 'redirectstofile' ) ) . "\n" );
 623                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 624
 625                 $sk = $wgUser->getSkin();
 626                 while ( $row = $dbr->fetchObject( $res ) ) {
 627                         $name = Title::makeTitle( NS_IMAGE, $row->page_title );
 628                         $link = $sk->makeKnownLinkObj( $name, "" );
 629                         wfDebug("Image redirect: {$row->page_title}\n");
 630                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 631                 }
 632                 $wgOut->addHTML( "</ul>\n" );
 633
 634                 $res->free();
 635         }
 636
 637         function imageDupes() {
 638                 global $wgOut, $wgUser;
 639
 640                 if ( !( $hash = $this->img->getSha1() ) ) return;
 641                 // Probably deprecates checkSharedConflict?
 642                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 643                 //$dupes = RepoGroup::singleton()->getLocalRepo()->findBySha1( $hash );
 644
 645                 // Don't dupe with self
 646                 $self = $this->img->getRepoName().':'.$this->img->getName();
 647                 foreach ( $dupes as $index => $file ) {
 648                         $key = $file->getRepoName().':'.$file->getName();
 649                         if ( $key == $self )
 650                                 unset( $dupes[$index] );
 651                 }
 652                 if ( count( $dupes ) == 0 ) return;
 653
 654                 $wgOut->addHTML( Xml::element( 'h5', null, wfMsg( 'duplicatesoffile' ) ) . "\n" );
 655                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 656
 657                 $sk = $wgUser->getSkin();
 658                 foreach ( $dupes as $file ) {
 659                         if ( $file->isLocal() )
 660                                 $link = $sk->makeKnownLinkObj( $file->getTitle(), "" );
 661                         else
 662                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 663                                         $file->getTitle()->getPrefixedText() );
 664                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 665                 }
 666                 $wgOut->addHTML( "</ul>\n" );
 667         }
 668
 669         /**
 670          * Delete the file, or an earlier version of it
 671          */
 672         public function delete() {
 673                 if( !$this->img->exists() || !$this->img->isLocal() ) {
 674                         // Standard article deletion
 675                         Article::delete();
 676                         return;
 677                 }
 678                 $deleter = new FileDeleteForm( $this->img );
 679                 $deleter->execute();
 680         }
 681
 682         /**
 683          * Revert the file to an earlier version
 684          */
 685         public function revert() {
 686                 $reverter = new FileRevertForm( $this->img );
 687                 $reverter->execute();
 688         }
 689
 690         /**
 691          * Override handling of action=purge
 692          */
 693         function doPurge() {
 694                 if( $this->img->exists() ) {
 695                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 696                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 697                         $update->doUpdate();
 698                         $this->img->upgradeRow();
 699                         $this->img->purgeCache();
 700                 } else {
 701                         wfDebug( "ImagePage::doPurge no image\n" );
 702                 }
 703                 parent::doPurge();
 704         }
 705
 706         /**
 707          * Display an error with a wikitext description
 708          */
 709         function showError( $description ) {
 710                 global $wgOut;
 711                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 712                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 713                 $wgOut->setArticleRelated( false );
 714                 $wgOut->enableClientCache( false );
 715                 $wgOut->addWikiText( $description );
 716         }
 717
 718 }
 719
 720 /**
 721  * Builds the image revision log shown on image pages
 722  *
 723  * @addtogroup Media
 724  */
 725 class ImageHistoryList {
 726
 727         protected $img, $skin, $title, $repo;
 728
 729         public function __construct( $skin, $img ) {
 730                 $this->skin = $skin;
 731                 $this->img = $img;
 732                 $this->title = $img->getTitle();
 733         }
 734
 735         public function beginImageHistoryList() {
 736                 global $wgOut, $wgUser;
 737                 $deleteColumn = $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deleterevision' );
 738                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) )
 739                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 740                         . Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
 741                         . '<tr><td></td>'
 742                         . ( $this->img->isLocal() && $deleteColumn ? '<td></td>' : '' )
 743                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 744                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 745                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 746                         . '<th class="mw-imagepage-filesize">' . wfMsgHtml( 'filehist-filesize' ) . '</th>'
 747                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 748                         . "</tr>\n";
 749         }
 750
 751         public function endImageHistoryList() {
 752                 return "</table>\n";
 753         }
 754
 755         public function imageHistoryLine( $iscur, $file ) {
 756                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 757
 758                 $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 759                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 760                 $user = $file->getUser('id');
 761                 $usertext = $file->getUser('text');
 762                 $size = $file->getSize();
 763                 $description = $file->getDescription();
 764                 $dims = $file->getDimensionsString();
 765                 $sha1 = $file->getSha1();
 766
 767                 $local = $this->img->isLocal();
 768                 $row = '';
 769
 770                 // Deletion link
 771                 if( $local && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ) {
 772                         $row .= '<td>';
 773                         # Link to remove from history
 774                         if( $wgUser->isAllowed( 'delete' ) ) {
 775                                 $q = array();
 776                                 $q[] = 'action=delete';
 777                                 if( !$iscur )
 778                                         $q[] = 'oldimage=' . urlencode( $img );
 779                                 $row .= $this->skin->makeKnownLinkObj(
 780                                         $this->title,
 781                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 782                                         implode( '&', $q )
 783                                 );
 784                                 $row .= '<br/>';
 785                         }
 786                         # Link to hide content
 787                         if( $wgUser->isAllowed( 'deleterevision' ) ) {
 788                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 789                                 // If file is top revision or locked from this user, don't link
 790                                 if( $iscur || !$file->userCan(File::DELETED_RESTRICTED) ) {
 791                                         $del = wfMsgHtml( 'rev-delundel' );
 792                                 } else {
 793                                         // If the file was hidden, link to sha-1
 794                                         list($ts,$name) = explode('!',$img,2);
 795                                         $del = $this->skin->makeKnownLinkObj( $revdel,  wfMsg( 'rev-delundel' ),
 796                                                 'target=' . urlencode( $wgTitle->getPrefixedText() ) .
 797                                                 '&oldimage=' . urlencode( $ts ) );
 798                                         // Bolden oversighted content
 799                                         if( $file->isDeleted(File::DELETED_RESTRICTED) )
 800                                                 $del = "<strong>$del</strong>";
 801                                 }
 802                                 $row .= "<tt><small>$del</small></tt>";
 803                         }
 804                         $row .= '</td>';
 805                 }
 806
 807                 // Reversion link/current indicator
 808                 $row .= '<td>';
 809                 if( $iscur ) {
 810                         $row .= wfMsgHtml( 'filehist-current' );
 811                 } elseif( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 812                         if( $file->isDeleted(File::DELETED_FILE) ) {
 813                                 $row .= wfMsgHtml('filehist-revert');
 814                         } else {
 815                                 $q = array();
 816                                 $q[] = 'action=revert';
 817                                 $q[] = 'oldimage=' . urlencode( $img );
 818                                 $q[] = 'wpEditToken=' . urlencode( $wgUser->editToken( $img ) );
 819                                 $row .= $this->skin->makeKnownLinkObj( $this->title,
 820                                         wfMsgHtml( 'filehist-revert' ),
 821                                         implode( '&', $q ) );
 822                         }
 823                 }
 824                 $row .= '</td>';
 825
 826                 // Date/time and image link
 827                 $row .= '<td>';
 828                 if( !$file->userCan(File::DELETED_FILE) ) {
 829                         # Don't link to unviewable files
 830                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 831                 } else if( $file->isDeleted(File::DELETED_FILE) ) {
 832                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 833                         # Make a link to review the image
 834                         $url = $this->skin->makeKnownLinkObj( $revdel, $wgLang->timeAndDate( $timestamp, true ),
 835                                 "target=".$wgTitle->getPrefixedText()."&file=$sha1.".$this->img->getExtension() );
 836                         $row .= '<span class="history-deleted">'.$url.'</span>';
 837                 } else {
 838                         $url = $iscur ? $this->img->getUrl() : $this->img->getArchiveUrl( $img );
 839                         $row .= Xml::element( 'a',
 840                                 array( 'href' => $url ),
 841                                 $wgLang->timeAndDate( $timestamp, true ) );
 842                 }
 843
 844                 $row .= '</td>';
 845
 846                 // Uploading user
 847                 $row .= '<td>';
 848                 if( $local ) {
 849                         // Hide deleted usernames
 850                         if( $file->isDeleted(File::DELETED_USER) )
 851                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 852                         else
 853                                 $row .= $this->skin->userLink( $user, $usertext ) .
 854                                         $this->skin->userToolLinks( $user, $usertext );
 855                 } else {
 856                         $row .= htmlspecialchars( $usertext );
 857                 }
 858                 $row .= '</td>';
 859
 860                 // Image dimensions
 861                 $row .= '<td>' . htmlspecialchars( $dims ) . '</td>';
 862
 863                 // File size
 864                 $row .= '<td class="mw-imagepage-filesize">' . $this->skin->formatSize( $size ) . '</td>';
 865
 866                 // Don't show deleted descriptions
 867                 if ( $file->isDeleted(File::DELETED_COMMENT) )
 868                         $row .= '<td><span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span></td>';
 869                 else
 870                         $row .= '<td>' . $this->skin->commentBlock( $description, $this->title ) . '</td>';
 871
 872                 return "<tr>{$row}</tr>\n";
 873         }
 874 }