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