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