includes/ImagePage.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  */
   5
   6 /**
   7  *
   8  */
   9 if( !defined( 'MEDIAWIKI' ) )
  10         die( 1 );
  11
  12 /**
  13  * Special handling for image description pages
  14  * @package MediaWiki
  15  */
  16 class ImagePage extends Article {
  17
  18         /* private */ var $img;  // Image object this page is shown for
  19         var $mExtraDescription = false;
  20
  21         /**
  22          * Handler for action=render
  23          * Include body text only; none of the image extras
  24          */
  25         function render() {
  26                 global $wgOut;
  27                 $wgOut->setArticleBodyOnly( true );
  28                 $wgOut->addSecondaryWikitext( $this->getContent() );
  29         }
  30
  31         function view() {
  32                 global $wgOut, $wgShowEXIF;
  33
  34                 $this->img = new Image( $this->mTitle );
  35
  36                 if( $this->mTitle->getNamespace() == NS_IMAGE  ) {
  37                         if ($wgShowEXIF && $this->img->exists()) {
  38                                 $exif = $this->img->getExifData();
  39                                 $showmeta = count($exif) ? true : false;
  40                         } else {
  41                                 $exif = false;
  42                                 $showmeta = false;
  43                         }
  44
  45                         if ($this->img->exists())
  46                                 $wgOut->addHTML($this->showTOC($showmeta));
  47
  48                         $this->openShowImage();
  49
  50                         # No need to display noarticletext, we use our own message, output in openShowImage()
  51                         if( $this->getID() ) {
  52                                 Article::view();
  53                         } else {
  54                                 # Just need to set the right headers
  55                                 $wgOut->setArticleFlag( true );
  56                                 $wgOut->setRobotpolicy( 'index,follow' );
  57                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  58                                 $this->viewUpdates();
  59                         }
  60
  61                         # Show shared description, if needed
  62                         if( $this->mExtraDescription ) {
  63                                 $fol = wfMsg( 'shareddescriptionfollows' );
  64                                 if( $fol != '-' ) {
  65                                         $wgOut->addWikiText( $fol );
  66                                 }
  67                                 $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
  68                         }
  69
  70                         $this->closeShowImage();
  71                         $this->imageHistory();
  72                         $this->imageLinks();
  73                         if( $exif ) {
  74                                 global $wgStylePath, $wgStyleVersion;
  75                                 $expand = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-expand' ) ) );
  76                                 $collapse = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-collapse' ) ) );
  77                                 $wgOut->addHTML( "<h2 id=\"metadata\">" . wfMsgHtml( 'metadata' ) . "</h2>\n" );
  78                                 $wgOut->addWikiText( $this->makeMetadataTable( $exif ) );
  79                                 $wgOut->addHTML(
  80                                         "<script type=\"text/javascript\" src=\"$wgStylePath/common/metadata.js?wgStyleVersion\"></script>\n" .
  81                                         "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
  82                         }
  83                 } else {
  84                         Article::view();
  85                 }
  86         }
  87
  88         /**
  89          * Create the TOC
  90          *
  91          * @access private
  92          *
  93          * @param bool $metadata Whether or not to show the metadata link
  94          * @return string
  95          */
  96         function showTOC( $metadata ) {
  97                 global $wgLang;
  98                 $r = '<ul id="filetoc">
  99                         <li><a href="#file">' . $wgLang->getNsText( NS_IMAGE ) . '</a></li>
 100                         <li><a href="#filehistory">' . wfMsgHtml( 'imghistory' ) . '</a></li>
 101                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 102                         ($metadata ? '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 103                 </ul>';
 104                 return $r;
 105         }
 106
 107         /**
 108          * Make a table with metadata to be shown in the output page.
 109          *
 110          * @access private
 111          *
 112          * @param array $exif The array containing the EXIF data
 113          * @return string
 114          */
 115         function makeMetadataTable( $exif ) {
 116                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 117                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 118                 $visibleFields = $this->visibleMetadataFields();
 119                 foreach( $exif as $k => $v ) {
 120                         $tag = strtolower( $k );
 121                         $msg = wfMsg( "exif-$tag" );
 122                         $class = "exif-$tag";
 123                         if( !in_array( $tag, $visibleFields ) ) {
 124                                 $class .= ' collapsable';
 125                         }
 126                         $r .= "|- class=\"$class\"\n";
 127                         $r .= "!| $msg\n";
 128                         $r .= "|| $v\n";
 129                 }
 130                 $r .= '|}';
 131                 return $r;
 132         }
 133
 134         /**
 135          * Get a list of EXIF metadata items which should be displayed when
 136          * the metadata table is collapsed.
 137          *
 138          * @return array of strings
 139          * @access private
 140          */
 141         function visibleMetadataFields() {
 142                 $fields = array();
 143                 $lines = explode( "\n", wfMsgForContent( 'metadata-fields' ) );
 144                 foreach( $lines as $line ) {
 145                         if( preg_match( '/^\\*\s*(.*?)\s*$/', $line, $matches ) ) {
 146                                 $fields[] = $matches[1];
 147                         }
 148                 }
 149                 return $fields;
 150         }
 151
 152         /**
 153          * Overloading Article's getContent method.
 154          *
 155          * Omit noarticletext if sharedupload; text will be fetched from the
 156          * shared upload server if possible.
 157          */
 158         function getContent() {
 159                 if( $this->img && $this->img->fromSharedDirectory && 0 == $this->getID() ) {
 160                         return '';
 161                 }
 162                 return Article::getContent();
 163         }
 164
 165         function openShowImage() {
 166                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang;
 167                 global $wgUseImageResize, $wgGenerateThumbnailOnParse;
 168
 169                 $full_url  = $this->img->getURL();
 170                 $anchoropen = '';
 171                 $anchorclose = '';
 172
 173                 if( $wgUser->getOption( 'imagesize' ) == '' ) {
 174                         $sizeSel = User::getDefaultOption( 'imagesize' );
 175                 } else {
 176                         $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 177                 }
 178                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 179                         $sizeSel = User::getDefaultOption( 'imagesize' );
 180                 }
 181                 $max = $wgImageLimits[$sizeSel];
 182                 $maxWidth = $max[0];
 183                 $maxHeight = $max[1];
 184
 185                 if ( $this->img->exists() ) {
 186                         # image
 187                         $page = $wgRequest->getIntOrNull( 'page' );
 188                         if ( ! is_null( $page ) ) {
 189                                 $this->img->selectPage( $page );
 190                         } else {
 191                                 $page = 1;
 192                         }
 193                         $width = $this->img->getWidth();
 194                         $height = $this->img->getHeight();
 195                         $showLink = false;
 196
 197                         if ( $this->img->allowInlineDisplay() and $width and $height) {
 198                                 # image
 199
 200                                 # "Download high res version" link below the image
 201                                 $msg = wfMsgHtml('showbigimage', $width, $height, intval( $this->img->getSize()/1024 ) );
 202
 203                                 # We'll show a thumbnail of this image
 204                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 205                                         # Calculate the thumbnail size.
 206                                         # First case, the limiting factor is the width, not the height.
 207                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 208                                                 $height = round( $height * $maxWidth / $width);
 209                                                 $width = $maxWidth;
 210                                                 # Note that $height <= $maxHeight now.
 211                                         } else {
 212                                                 $newwidth = floor( $width * $maxHeight / $height);
 213                                                 $height = round( $height * $newwidth / $width );
 214                                                 $width = $newwidth;
 215                                                 # Note that $height <= $maxHeight now, but might not be identical
 216                                                 # because of rounding.
 217                                         }
 218
 219                                         if( $wgUseImageResize ) {
 220                                                 $thumbnail = $this->img->getThumbnail( $width, -1, $wgGenerateThumbnailOnParse );
 221                                                 if ( $thumbnail == null ) {
 222                                                         $url = $this->img->getViewURL();
 223                                                 } else {
 224                                                         $url = $thumbnail->getURL();
 225                                                 }
 226                                         } else {
 227                                                 # No resize ability? Show the full image, but scale
 228                                                 # it down in the browser so it fits on the page.
 229                                                 $url = $this->img->getViewURL();
 230                                         }
 231                                         $anchoropen  = "<a href=\"{$full_url}\">";
 232                                         $anchorclose = "</a><br />";
 233                                         if( $this->img->mustRender() ) {
 234                                                 $showLink = true;
 235                                         } else {
 236                                                 $anchorclose .= "\n$anchoropen{$msg}</a>";
 237                                         }
 238                                 } else {
 239                                         $url = $this->img->getViewURL();
 240                                         $showLink = true;
 241                                 }
 242
 243                                 if ( $this->img->isMultipage() ) {
 244                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 245                                 }
 246
 247                                 $wgOut->addHTML( '<div class="fullImageLink" id="file">' . $anchoropen .
 248                                      "<img border=\"0\" src=\"{$url}\" width=\"{$width}\" height=\"{$height}\" alt=\"" .
 249                                      htmlspecialchars( $wgRequest->getVal( 'image' ) ).'" />' . $anchorclose . '</div>' );
 250
 251                                 if ( $this->img->isMultipage() ) {
 252                                         $count = $this->img->pageCount();
 253
 254                                         if ( $page > 1 ) {
 255                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 256                                                 $link = Linker::makeLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 257                                                 $this->img->selectPage( $page - 1 );
 258                                                 $thumb1 = Linker::makeThumbLinkObj( $this->img, $link, $label, 'none' );
 259                                         } else {
 260                                                 $thumb1 = '';
 261                                         }
 262
 263                                         if ( $page < $count ) {
 264                                                 $label = wfMsg( 'imgmultipagenext' );
 265                                                 $this->img->selectPage( $page + 1 );
 266                                                 $link = Linker::makeLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 267                                                 $thumb2 = Linker::makeThumbLinkObj( $this->img, $link, $label, 'none' );
 268                                         } else {
 269                                                 $thumb2 = '';
 270                                         }
 271
 272                                         $select = '<form name="pageselector" action="' . $this->img->getEscapeLocalUrl( '' ) . '" method="GET" onchange="document.pageselector.submit();">' ;
 273                                         $select .= $wgOut->parse( wfMsg( 'imgmultigotopre' ), false ) .
 274                                                 ' <select id="pageselector" name="page">';
 275                                         for ( $i=1; $i <= $count; $i++ ) {
 276                                                 $select .= Xml::option( $wgLang->formatNum( $i ), $i,
 277                                                         $i == $page );
 278                                         }
 279                                         $select .= '</select>' . $wgOut->parse( wfMsg( 'imgmultigotopost' ), false ) .
 280                                                 '<input type="submit" value="' .
 281                                                 htmlspecialchars( wfMsg( 'imgmultigo' ) ) . '"></form>';
 282
 283                                         $wgOut->addHTML( '</td><td><div class="multipageimagenavbox">' .
 284                                            "$select<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>" );
 285                                 }
 286                         } else {
 287                                 #if direct link is allowed but it's not a renderable image, show an icon.
 288                                 if ($this->img->isSafeFile()) {
 289                                         $icon= $this->img->iconThumb();
 290
 291                                         $wgOut->addHTML( '<div class="fullImageLink" id="file"><a href="' . $full_url . '">' .
 292                                         $icon->toHtml() .
 293                                         '</a></div>' );
 294                                 }
 295
 296                                 $showLink = true;
 297                         }
 298
 299
 300                         if ($showLink) {
 301                                 $filename = wfEscapeWikiText( $this->img->getName() );
 302                                 $info = wfMsg( 'fileinfo',
 303                                         ceil($this->img->getSize()/1024.0),
 304                                         $this->img->getMimeType() );
 305
 306                                 global $wgContLang;
 307                                 $dirmark = $wgContLang->getDirMark();
 308                                 if (!$this->img->isSafeFile()) {
 309                                         $warning = wfMsg( 'mediawarning' );
 310                                         $wgOut->addWikiText( <<<END
 311 <div class="fullMedia">
 312 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 313 <span class="fileInfo"> ($info)</span>
 314 </div>
 315
 316 <div class="mediaWarning">$warning</div>
 317 END
 318                                                 );
 319                                 } else {
 320                                         $wgOut->addWikiText( <<<END
 321 <div class="fullMedia">
 322 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> ($info)</span>
 323 </div>
 324 END
 325                                                 );
 326                                 }
 327                         }
 328
 329                         if($this->img->fromSharedDirectory) {
 330                                 $this->printSharedImageText();
 331                         }
 332                 } else {
 333                         # Image does not exist
 334
 335                         $title = SpecialPage::getTitleFor( 'Upload' );
 336                         $link = Linker::makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 337                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 338                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 339                 }
 340         }
 341
 342         function printSharedImageText() {
 343                 global $wgRepositoryBaseUrl, $wgFetchCommonsDescriptions, $wgOut;
 344
 345                 $url = $wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey());
 346                 $sharedtext = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml("sharedupload");
 347                 if ($wgRepositoryBaseUrl && !$wgFetchCommonsDescriptions) {
 348                         $title = SpecialPage::getTitleFor( 'Upload' );
 349                         $link = Linker::makeKnownLinkObj($title, wfMsgHtml('shareduploadwiki-linktext'),
 350                         array( 'wpDestFile' => urlencode( $this->img->getName() )));
 351                         $sharedtext .= " " . wfMsgWikiHtml('shareduploadwiki', $link);
 352                 }
 353                 $sharedtext .= "</div>";
 354                 $wgOut->addHTML($sharedtext);
 355
 356                 if ($wgRepositoryBaseUrl && $wgFetchCommonsDescriptions) {
 357                         $text = Http::get($url . '?action=render');
 358                         if ($text)
 359                                 $this->mExtraDescription = $text;
 360                 }
 361         }
 362
 363         function getUploadUrl() {
 364                 global $wgServer;
 365                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 366                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 367         }
 368
 369         /**
 370          * Print out the various links at the bottom of the image page, e.g. reupload,
 371          * external editing (and instructions link) etc.
 372          */
 373         function uploadLinksBox() {
 374                 global $wgUser, $wgOut;
 375
 376                 if( $this->img->fromSharedDirectory )
 377                         return;
 378
 379                 $wgOut->addHtml( '<br /><ul>' );
 380
 381                 # "Upload a new version of this file" link
 382                 if( $wgUser->isAllowed( 'reupload' ) ) {
 383                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 384                         $wgOut->addHtml( "<li><div>{$ulink}</div></li>" );
 385                 }
 386
 387                 # External editing link
 388                 $elink = Linker::makeKnownLinkObj( $this->mTitle, wfMsg( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 389                 $wgOut->addHtml( '<li>' . $elink . '<div>' . wfMsgWikiHtml( 'edit-externally-help' ) . '</div></li>' );
 390
 391                 $wgOut->addHtml( '</ul>' );
 392         }
 393
 394         function closeShowImage()
 395         {
 396                 # For overloading
 397
 398         }
 399
 400         /**
 401          * If the page we've just displayed is in the "Image" namespace,
 402          * we follow it with an upload history of the image and its usage.
 403          */
 404         function imageHistory() {
 405                 global $wgOut, $wgUseExternalEditor;
 406
 407                 $line = $this->img->nextHistoryLine();
 408
 409                 if ( $line ) {
 410                         $list = new ImageHistoryList();
 411                         $s = $list->beginImageHistoryList() .
 412                                 $list->imageHistoryLine( true, wfTimestamp(TS_MW, $line->img_timestamp),
 413                                         $this->mTitle->getDBkey(),  $line->img_user,
 414                                         $line->img_user_text, $line->img_size, $line->img_description,
 415                                         $line->img_width, $line->img_height
 416                                 );
 417
 418                         while ( $line = $this->img->nextHistoryLine() ) {
 419                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 420                                         $line->oi_archive_name, $line->img_user,
 421                                         $line->img_user_text, $line->img_size, $line->img_description,
 422                                         $line->img_width, $line->img_height
 423                                 );
 424                         }
 425                         $s .= $list->endImageHistoryList();
 426                 } else { $s=''; }
 427                 $wgOut->addHTML( $s );
 428
 429                 # Exist check because we don't want to show this on pages where an image
 430                 # doesn't exist along with the noimage message, that would suck. -ævar
 431                 if( $wgUseExternalEditor && $this->img->exists() ) {
 432                         $this->uploadLinksBox();
 433                 }
 434
 435         }
 436
 437         function imageLinks() {
 438                 global $wgOut;
 439
 440                 $wgOut->addHTML( '<h2 id="filelinks">' . wfMsg( 'imagelinks' ) . "</h2>\n" );
 441
 442                 $dbr =& wfGetDB( DB_SLAVE );
 443                 $page = $dbr->tableName( 'page' );
 444                 $imagelinks = $dbr->tableName( 'imagelinks' );
 445
 446                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 447                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id";
 448                 $sql = $dbr->limitResult($sql, 500, 0);
 449                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 450
 451                 if ( 0 == $dbr->numRows( $res ) ) {
 452                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 453                         return;
 454                 }
 455                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 456
 457                 while ( $s = $dbr->fetchObject( $res ) ) {
 458                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 459                         $link = Linker::makeKnownLinkObj( $name, "" );
 460                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 461                 }
 462                 $wgOut->addHTML( "</ul>\n" );
 463         }
 464
 465         function delete()
 466         {
 467                 global $wgUser, $wgOut, $wgRequest;
 468
 469                 $confirm = $wgRequest->wasPosted();
 470                 $reason = $wgRequest->getVal( 'wpReason' );
 471                 $image = $wgRequest->getVal( 'image' );
 472                 $oldimage = $wgRequest->getVal( 'oldimage' );
 473
 474                 # Only sysops can delete images. Previously ordinary users could delete
 475                 # old revisions, but this is no longer the case.
 476                 if ( !$wgUser->isAllowed('delete') ) {
 477                         $wgOut->permissionRequired( 'delete' );
 478                         return;
 479                 }
 480                 if ( $wgUser->isBlocked() ) {
 481                         return $this->blockedIPpage();
 482                 }
 483                 if ( wfReadOnly() ) {
 484                         $wgOut->readOnlyPage();
 485                         return;
 486                 }
 487
 488                 # Better double-check that it hasn't been deleted yet!
 489                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 490                 if ( ( !is_null( $image ) )
 491                   && ( '' == trim( $image ) ) ) {
 492                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
 493                         return;
 494                 }
 495
 496                 $this->img  = new Image( $this->mTitle );
 497
 498                 # Deleting old images doesn't require confirmation
 499                 if ( !is_null( $oldimage ) || $confirm ) {
 500                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 501                                 $this->doDelete( $reason );
 502                         } else {
 503                                 $wgOut->showFatalError( wfMsg( 'sessionfailure' ) );
 504                         }
 505                         return;
 506                 }
 507
 508                 if ( !is_null( $image ) ) {
 509                         $q = '&image=' . urlencode( $image );
 510                 } else if ( !is_null( $oldimage ) ) {
 511                         $q = '&oldimage=' . urlencode( $oldimage );
 512                 } else {
 513                         $q = '';
 514                 }
 515                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 516         }
 517
 518         /*
 519          * Delete an image.
 520          * @param $reason User provided reason for deletion.
 521          */
 522         function doDelete( $reason ) {
 523                 global $wgOut, $wgRequest, $wgUseSquid;
 524                 global $wgPostCommitUpdateList;
 525
 526                 $fname = 'ImagePage::doDelete';
 527
 528                 $oldimage = $wgRequest->getVal( 'oldimage' );
 529
 530                 $dbw =& wfGetDB( DB_MASTER );
 531
 532                 if ( !is_null( $oldimage ) ) {
 533                         if ( strlen( $oldimage ) < 16 ) {
 534                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 535                                 return;
 536                         }
 537                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 538                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 539                                 return;
 540                         }
 541                         if ( !$this->doDeleteOldImage( $oldimage ) ) {
 542                                 return;
 543                         }
 544                         $deleted = $oldimage;
 545                 } else {
 546                         $ok = $this->img->delete( $reason );
 547                         if( !$ok ) {
 548                                 # If the deletion operation actually failed, bug out:
 549                                 $wgOut->showFileDeleteError( $this->img->getName() );
 550                                 return;
 551                         }
 552
 553                         # Image itself is now gone, and database is cleaned.
 554                         # Now we remove the image description page.
 555
 556                         $article = new Article( $this->mTitle );
 557                         $article->doDeleteArticle( $reason ); # ignore errors
 558
 559                         $deleted = $this->img->getName();
 560                 }
 561
 562                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 563                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 564
 565                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
 566                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 567
 568                 $wgOut->addWikiText( $text );
 569
 570                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 571         }
 572
 573         /**
 574          * @return success
 575          */
 576         function doDeleteOldImage( $oldimage )
 577         {
 578                 global $wgOut;
 579
 580                 $ok = $this->img->deleteOld( $oldimage, '' );
 581                 if( !$ok ) {
 582                         # If we actually have a file and can't delete it, throw an error.
 583                         # Something went awry...
 584                         $wgOut->showFileDeleteError( "$oldimage" );
 585                 } else {
 586                         # Log the deletion
 587                         $log = new LogPage( 'delete' );
 588                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 589                 }
 590                 return $ok;
 591         }
 592
 593         function revert() {
 594                 global $wgOut, $wgRequest, $wgUser;
 595
 596                 $oldimage = $wgRequest->getText( 'oldimage' );
 597                 if ( strlen( $oldimage ) < 16 ) {
 598                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 599                         return;
 600                 }
 601                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 602                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 603                         return;
 604                 }
 605
 606                 if ( wfReadOnly() ) {
 607                         $wgOut->readOnlyPage();
 608                         return;
 609                 }
 610                 if( $wgUser->isAnon() ) {
 611                         $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 612                         return;
 613                 }
 614                 if ( ! $this->mTitle->userCanEdit() ) {
 615                         $wgOut->readOnlyPage( $this->getContent(), true );
 616                         return;
 617                 }
 618                 if ( $wgUser->isBlocked() ) {
 619                         return $this->blockedIPpage();
 620                 }
 621                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 622                         $wgOut->showErrorPage( 'internalerror', 'sessionfailure' );
 623                         return;
 624                 }
 625                 $name = substr( $oldimage, 15 );
 626
 627                 $dest = wfImageDir( $name );
 628                 $archive = wfImageArchiveDir( $name );
 629                 $curfile = "{$dest}/{$name}";
 630
 631                 if ( !is_dir( $dest ) ) wfMkdirParents( $dest );
 632                 if ( !is_dir( $archive ) ) wfMkdirParents( $archive );
 633
 634                 if ( ! is_file( $curfile ) ) {
 635                         $wgOut->showFileNotFoundError( htmlspecialchars( $curfile ) );
 636                         return;
 637                 }
 638                 $oldver = wfTimestampNow() . "!{$name}";
 639
 640                 $dbr =& wfGetDB( DB_SLAVE );
 641                 $size = $dbr->selectField( 'oldimage', 'oi_size', array( 'oi_archive_name' => $oldimage )  );
 642
 643                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 644                         $wgOut->showFileRenameError( $curfile, "${archive}/{$oldver}" );
 645                         return;
 646                 }
 647                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 648                         $wgOut->showFileCopyError( "${archive}/{$oldimage}", $curfile );
 649                         return;
 650                 }
 651
 652                 # Record upload and update metadata cache
 653                 $img = Image::newFromName( $name );
 654                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 655
 656                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 657                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 658                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 659
 660                 $descTitle = $img->getTitle();
 661                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 662         }
 663
 664         function blockedIPpage() {
 665                 $edit = new EditPage( $this );
 666                 return $edit->blockedIPpage();
 667         }
 668
 669         /**
 670          * Override handling of action=purge
 671          */
 672         function doPurge() {
 673                 $this->img = new Image( $this->mTitle );
 674                 if( $this->img->exists() ) {
 675                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 676                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 677                         $update->doUpdate();
 678                         $this->img->purgeCache();
 679                 } else {
 680                         wfDebug( "ImagePage::doPurge no image\n" );
 681                 }
 682                 parent::doPurge();
 683         }
 684
 685 }
 686
 687 /**
 688  * @todo document
 689  * @package MediaWiki
 690  */
 691 class ImageHistoryList {
 692         function ImageHistoryList() {
 693         }
 694
 695         function beginImageHistoryList() {
 696                 $s = "\n<h2 id=\"filehistory\">" . wfMsg( 'imghistory' ) . "</h2>\n" .
 697                   "<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 698                 return $s;
 699         }
 700
 701         function endImageHistoryList() {
 702                 $s = "</ul>\n";
 703                 return $s;
 704         }
 705
 706         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description, $width, $height ) {
 707                 global $wgUser, $wgLang, $wgTitle, $wgContLang;
 708
 709                 $datetime = $wgLang->timeanddate( $timestamp, true );
 710                 $del = wfMsg( 'deleteimg' );
 711                 $delall = wfMsg( 'deleteimgcompletely' );
 712                 $cur = wfMsg( 'cur' );
 713
 714                 if ( $iscur ) {
 715                         $url = Image::imageUrl( $img );
 716                         $rlink = $cur;
 717                         if ( $wgUser->isAllowed('delete') ) {
 718                                 $dlink = Linker::makeKnownLinkObj( $wgTitle, $delall,
 719                                         'image=' . $wgTitle->getPartialURL() . '&action=delete');
 720                         } else {
 721                                 $dlink = $del;
 722                         }
 723                 } else {
 724                         $url = htmlspecialchars( wfImageArchiveUrl( $img ) );
 725                         if( $wgUser->getID() != 0 && $wgTitle->userCanEdit() ) {
 726                                 $token = urlencode( $wgUser->editToken( $img ) );
 727                                 $rlink = Linker::makeKnownLinkObj( $wgTitle,
 728                                            wfMsg( 'revertimg' ), 'action=revert&oldimage=' .
 729                                            urlencode( $img ) . "&wpEditToken=$token" );
 730                                 $dlink = Linker::makeKnownLinkObj( $wgTitle,
 731                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 732                                            "&wpEditToken=$token" );
 733                         } else {
 734                                 # Having live active links for non-logged in users
 735                                 # means that bots and spiders crawling our site can
 736                                 # inadvertently change content. Baaaad idea.
 737                                 $rlink = wfMsg( 'revertimg' );
 738                                 $dlink = $del;
 739                         }
 740                 }
 741
 742                 $userlink = Linker::userLink( $user, $usertext ) . Linker::userToolLinks( $user, $usertext );
 743                 $nbytes = wfMsgExt( 'nbytes', array( 'parsemag', 'escape' ),
 744                         $wgLang->formatNum( $size ) );
 745                 $widthheight = wfMsg( 'widthheight', $width, $height );
 746                 $style = Linker::getInternalLinkAttributes( $url, $datetime );
 747
 748                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a> . . {$userlink} . . {$widthheight} ({$nbytes})";
 749
 750                 $s .= Linker::commentBlock( $description, $wgTitle );
 751                 $s .= "</li>\n";
 752                 return $s;
 753         }
 754
 755 }
 756
 757
 758 ?>