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         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, $wgRequest, $wgUser;
  33
  34                 $this->img = new Image( $this->mTitle );
  35
  36                 $diff = $wgRequest->getVal( 'diff' );
  37                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  38
  39                 if ( $this->mTitle->getNamespace() != NS_IMAGE || ( isset( $diff ) && $diffOnly ) )
  40                         return Article::view();
  41
  42                 if ($wgShowEXIF && $this->img->exists()) {
  43                         $exif = $this->img->getExifData();
  44                         $showmeta = count($exif) ? true : false;
  45                 } else {
  46                         $exif = false;
  47                         $showmeta = false;
  48                 }
  49
  50                 if ($this->img->exists())
  51                         $wgOut->addHTML($this->showTOC($showmeta));
  52
  53                 $this->openShowImage();
  54
  55                 # No need to display noarticletext, we use our own message, output in openShowImage()
  56                 if ( $this->getID() ) {
  57                         Article::view();
  58                 } else {
  59                         # Just need to set the right headers
  60                         $wgOut->setArticleFlag( true );
  61                         $wgOut->setRobotpolicy( 'index,follow' );
  62                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  63                         $this->viewUpdates();
  64                 }
  65
  66                 # Show shared description, if needed
  67                 if ( $this->mExtraDescription ) {
  68                         $fol = wfMsg( 'shareddescriptionfollows' );
  69                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
  70                                 $wgOut->addWikiText( $fol );
  71                         }
  72                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
  73                 }
  74
  75                 $this->closeShowImage();
  76                 $this->imageHistory();
  77                 $this->imageLinks();
  78
  79                 if ( $exif ) {
  80                         global $wgStylePath, $wgStyleVersion;
  81                         $expand = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-expand' ) ) );
  82                         $collapse = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-collapse' ) ) );
  83                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
  84                         $wgOut->addWikiText( $this->makeMetadataTable( $exif ) );
  85                         $wgOut->addHTML(
  86                                 "<script type=\"text/javascript\" src=\"$wgStylePath/common/metadata.js?$wgStyleVersion\"></script>\n" .
  87                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
  88                 }
  89         }
  90
  91         /**
  92          * Create the TOC
  93          *
  94          * @access private
  95          *
  96          * @param bool $metadata Whether or not to show the metadata link
  97          * @return string
  98          */
  99         function showTOC( $metadata ) {
 100                 global $wgLang;
 101                 $r = '<ul id="filetoc">
 102                         <li><a href="#file">' . $wgLang->getNsText( NS_IMAGE ) . '</a></li>
 103                         <li><a href="#filehistory">' . wfMsgHtml( 'imghistory' ) . '</a></li>
 104                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 105                         ($metadata ? '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 106                 </ul>';
 107                 return $r;
 108         }
 109
 110         /**
 111          * Make a table with metadata to be shown in the output page.
 112          *
 113          * @access private
 114          *
 115          * @param array $exif The array containing the EXIF data
 116          * @return string
 117          */
 118         function makeMetadataTable( $exif ) {
 119                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 120                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 121                 $visibleFields = $this->visibleMetadataFields();
 122                 foreach( $exif as $k => $v ) {
 123                         $tag = strtolower( $k );
 124                         $msg = wfMsg( "exif-$tag" );
 125                         $class = "exif-$tag";
 126                         if( !in_array( $tag, $visibleFields ) ) {
 127                                 $class .= ' collapsable';
 128                         }
 129                         $r .= "|- class=\"$class\"\n";
 130                         $r .= "!| $msg\n";
 131                         $r .= "|| $v\n";
 132                 }
 133                 $r .= '|}';
 134                 return $r;
 135         }
 136
 137         /**
 138          * Get a list of EXIF metadata items which should be displayed when
 139          * the metadata table is collapsed.
 140          *
 141          * @return array of strings
 142          * @access private
 143          */
 144         function visibleMetadataFields() {
 145                 $fields = array();
 146                 $lines = explode( "\n", wfMsgForContent( 'metadata-fields' ) );
 147                 foreach( $lines as $line ) {
 148                         $matches = array();
 149                         if( preg_match( '/^\\*\s*(.*?)\s*$/', $line, $matches ) ) {
 150                                 $fields[] = $matches[1];
 151                         }
 152                 }
 153                 return $fields;
 154         }
 155
 156         /**
 157          * Overloading Article's getContent method.
 158          *
 159          * Omit noarticletext if sharedupload; text will be fetched from the
 160          * shared upload server if possible.
 161          */
 162         function getContent() {
 163                 if( $this->img && $this->img->fromSharedDirectory && 0 == $this->getID() ) {
 164                         return '';
 165                 }
 166                 return Article::getContent();
 167         }
 168
 169         function openShowImage() {
 170                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang;
 171
 172                 $full_url  = $this->img->getURL();
 173                 $linkAttribs = false;
 174                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 175                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 176                         $sizeSel = User::getDefaultOption( 'imagesize' );
 177
 178                         // The user offset might still be incorrect, specially if
 179                         // $wgImageLimits got changed (see bug #8858).
 180                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 181                                 // Default to the first offset in $wgImageLimits
 182                                 $sizeSel = 0;
 183                         }
 184                 }
 185                 $max = $wgImageLimits[$sizeSel];
 186                 $maxWidth = $max[0];
 187                 $maxHeight = $max[1];
 188                 $sk = $wgUser->getSkin();
 189
 190                 if ( $this->img->exists() ) {
 191                         # image
 192                         $page = $wgRequest->getIntOrNull( 'page' );
 193                         if ( is_null( $page ) ) {
 194                                 $params = array();
 195                                 $page = 1;
 196                         } else {
 197                                 $params = array( 'page' => $page );
 198                         }
 199                         $width_orig = $this->img->getWidth();
 200                         $width = $width_orig;
 201                         $height_orig = $this->img->getHeight();
 202                         $height = $height_orig;
 203                         $mime = $this->img->getMimeType();
 204                         $showLink = false;
 205                         $linkAttribs = array( 'href' => $full_url );
 206
 207                         if ( $this->img->allowInlineDisplay() and $width and $height) {
 208                                 # image
 209
 210                                 # "Download high res version" link below the image
 211                                 $msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->img->getSize() ), $mime );
 212                                 # We'll show a thumbnail of this image
 213                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 214                                         # Calculate the thumbnail size.
 215                                         # First case, the limiting factor is the width, not the height.
 216                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 217                                                 $height = round( $height * $maxWidth / $width);
 218                                                 $width = $maxWidth;
 219                                                 # Note that $height <= $maxHeight now.
 220                                         } else {
 221                                                 $newwidth = floor( $width * $maxHeight / $height);
 222                                                 $height = round( $height * $newwidth / $width );
 223                                                 $width = $newwidth;
 224                                                 # Note that $height <= $maxHeight now, but might not be identical
 225                                                 # because of rounding.
 226                                         }
 227                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 228                                         $msgsmall = wfMsgExt( 'show-big-image-thumb',
 229                                                 array( 'parseinline' ), $width, $height );
 230                                 } else {
 231                                         # Image is small enough to show full size on image page
 232                                         $msgbig = htmlspecialchars( $this->img->getName() );
 233                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 234                                 }
 235
 236                                 $params['width'] = $width;
 237                                 $thumbnail = $this->img->transform( $params );
 238
 239                                 $anchorclose = "<br />";
 240                                 if( $this->img->mustRender() ) {
 241                                         $showLink = true;
 242                                 } else {
 243                                         $anchorclose .=
 244                                                 $msgsmall .
 245                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . ' ' . $msgsize;
 246                                 }
 247
 248                                 if ( $this->img->isMultipage() ) {
 249                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 250                                 }
 251
 252                                 $imgAttribs = array(
 253                                         'border' => 0,
 254                                         'alt' => $this->img->getTitle()->getPrefixedText()
 255                                 );
 256
 257                                 if ( $thumbnail ) {
 258                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 259                                                 $thumbnail->toHtml( $imgAttribs, $linkAttribs ) .
 260                                                 $anchorclose . '</div>' );
 261                                 }
 262
 263                                 if ( $this->img->isMultipage() ) {
 264                                         $count = $this->img->pageCount();
 265
 266                                         if ( $page > 1 ) {
 267                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 268                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 269                                                 $thumb1 = $sk->makeThumbLinkObj( $this->img, $link, $label, 'none',
 270                                                         array( 'page' => $page - 1 ) );
 271                                         } else {
 272                                                 $thumb1 = '';
 273                                         }
 274
 275                                         if ( $page < $count ) {
 276                                                 $label = wfMsg( 'imgmultipagenext' );
 277                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 278                                                 $thumb2 = $sk->makeThumbLinkObj( $this->img, $link, $label, 'none',
 279                                                         array( 'page' => $page + 1 ) );
 280                                         } else {
 281                                                 $thumb2 = '';
 282                                         }
 283
 284                                         global $wgScript;
 285                                         $select = '<form name="pageselector" action="' .
 286                                                 htmlspecialchars( $wgScript ) .
 287                                                 '" method="get" onchange="document.pageselector.submit();">' .
 288                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() );
 289                                         $select .= $wgOut->parse( wfMsg( 'imgmultigotopre' ), false ) .
 290                                                 ' <select id="pageselector" name="page">';
 291                                         for ( $i=1; $i <= $count; $i++ ) {
 292                                                 $select .= Xml::option( $wgLang->formatNum( $i ), $i,
 293                                                         $i == $page );
 294                                         }
 295                                         $select .= '</select>' . $wgOut->parse( wfMsg( 'imgmultigotopost' ), false ) .
 296                                                 '<input type="submit" value="' .
 297                                                 htmlspecialchars( wfMsg( 'imgmultigo' ) ) . '"></form>';
 298
 299                                         $wgOut->addHTML( '</td><td><div class="multipageimagenavbox">' .
 300                                                 "$select<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>" );
 301                                 }
 302                         } else {
 303                                 #if direct link is allowed but it's not a renderable image, show an icon.
 304                                 if ($this->img->isSafeFile()) {
 305                                         $icon= $this->img->iconThumb();
 306
 307                                         $wgOut->addHTML( '<div class="fullImageLink" id="file"><a href="' . $full_url . '">' .
 308                                         $icon->toHtml() .
 309                                         '</a></div>' );
 310                                 }
 311
 312                                 $showLink = true;
 313                         }
 314
 315
 316                         if ($showLink) {
 317                                 // Workaround for incorrect MIME type on SVGs uploaded in previous versions
 318                                 if ($mime == 'image/svg') $mime = 'image/svg+xml';
 319
 320                                 $filename = wfEscapeWikiText( $this->img->getName() );
 321                                 $info = wfMsg( 'file-info', $sk->formatSize( $this->img->getSize() ), $mime );
 322                                 $infores = '';
 323
 324                                 // Check for MIME type. Other types may have more information in the future.
 325                                 if (substr($mime,0,9) == 'image/svg' ) {
 326                                         $infores = wfMsg('file-svg', $width_orig, $height_orig ) . '<br />';
 327                                 }
 328
 329                                 global $wgContLang;
 330                                 $dirmark = $wgContLang->getDirMark();
 331                                 if (!$this->img->isSafeFile()) {
 332                                         $warning = wfMsg( 'mediawarning' );
 333                                         $wgOut->addWikiText( <<<END
 334 <div class="fullMedia">$infores
 335 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 336 <span class="fileInfo"> $info</span>
 337 </div>
 338
 339 <div class="mediaWarning">$warning</div>
 340 END
 341                                                 );
 342                                 } else {
 343                                         $wgOut->addWikiText( <<<END
 344 <div class="fullMedia">$infores
 345 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $info</span>
 346 </div>
 347 END
 348                                                 );
 349                                 }
 350                         }
 351
 352                         if($this->img->fromSharedDirectory) {
 353                                 $this->printSharedImageText();
 354                         }
 355                 } else {
 356                         # Image does not exist
 357
 358                         $title = SpecialPage::getTitleFor( 'Upload' );
 359                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 360                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 361                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 362                 }
 363         }
 364
 365         function printSharedImageText() {
 366                 global $wgRepositoryBaseUrl, $wgFetchCommonsDescriptions, $wgOut, $wgUser;
 367
 368                 $url = $wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey());
 369                 $sharedtext = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml("sharedupload");
 370                 if ($wgRepositoryBaseUrl && !$wgFetchCommonsDescriptions) {
 371
 372                         $sk = $wgUser->getSkin();
 373                         $title = SpecialPage::getTitleFor( 'Upload' );
 374                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('shareduploadwiki-linktext'),
 375                         array( 'wpDestFile' => urlencode( $this->img->getName() )));
 376                         $sharedtext .= " " . wfMsgWikiHtml('shareduploadwiki', $link);
 377                 }
 378                 $sharedtext .= "</div>";
 379                 $wgOut->addHTML($sharedtext);
 380
 381                 if ($wgRepositoryBaseUrl && $wgFetchCommonsDescriptions) {
 382                         $renderUrl = wfAppendQuery( $url, 'action=render' );
 383                         wfDebug( "Fetching shared description from $renderUrl\n" );
 384                         $text = Http::get( $renderUrl );
 385                         if ($text)
 386                                 $this->mExtraDescription = $text;
 387                 }
 388         }
 389
 390         function getUploadUrl() {
 391                 global $wgServer;
 392                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 393                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 394         }
 395
 396         /**
 397          * Print out the various links at the bottom of the image page, e.g. reupload,
 398          * external editing (and instructions link) etc.
 399          */
 400         function uploadLinksBox() {
 401                 global $wgUser, $wgOut;
 402
 403                 if( $this->img->fromSharedDirectory )
 404                         return;
 405
 406                 $sk = $wgUser->getSkin();
 407
 408                 $wgOut->addHtml( '<br /><ul>' );
 409
 410                 # "Upload a new version of this file" link
 411                 if( $wgUser->isAllowed( 'reupload' ) ) {
 412                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 413                         $wgOut->addHtml( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 414                 }
 415
 416                 # External editing link
 417                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 418                 $wgOut->addHtml( '<li>' . $elink . '<div>' . wfMsgWikiHtml( 'edit-externally-help' ) . '</div></li>' );
 419
 420                 $wgOut->addHtml( '</ul>' );
 421         }
 422
 423         function closeShowImage()
 424         {
 425                 # For overloading
 426
 427         }
 428
 429         /**
 430          * If the page we've just displayed is in the "Image" namespace,
 431          * we follow it with an upload history of the image and its usage.
 432          */
 433         function imageHistory()
 434         {
 435                 global $wgUser, $wgOut, $wgUseExternalEditor;
 436
 437                 $sk = $wgUser->getSkin();
 438
 439                 $line = $this->img->nextHistoryLine();
 440
 441                 if ( $line ) {
 442                         $list = new ImageHistoryList( $sk );
 443                         $s = $list->beginImageHistoryList() .
 444                                 $list->imageHistoryLine( true, wfTimestamp(TS_MW, $line->img_timestamp),
 445                                         $this->mTitle->getDBkey(),  $line->img_user,
 446                                         $line->img_user_text, $line->img_size, $line->img_description,
 447                                         $line->img_width, $line->img_height
 448                                 );
 449
 450                         while ( $line = $this->img->nextHistoryLine() ) {
 451                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 452                                         $line->oi_archive_name, $line->img_user,
 453                                         $line->img_user_text, $line->img_size, $line->img_description,
 454                                         $line->img_width, $line->img_height
 455                                 );
 456                         }
 457                         $s .= $list->endImageHistoryList();
 458                 } else { $s=''; }
 459                 $wgOut->addHTML( $s );
 460
 461                 # Exist check because we don't want to show this on pages where an image
 462                 # doesn't exist along with the noimage message, that would suck. -ævar
 463                 if( $wgUseExternalEditor && $this->img->exists() ) {
 464                         $this->uploadLinksBox();
 465                 }
 466
 467         }
 468
 469         function imageLinks()
 470         {
 471                 global $wgUser, $wgOut;
 472
 473                 $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'filelinks' ), wfMsg( 'imagelinks' ) ) . "\n" );
 474
 475                 $dbr = wfGetDB( DB_SLAVE );
 476                 $page = $dbr->tableName( 'page' );
 477                 $imagelinks = $dbr->tableName( 'imagelinks' );
 478
 479                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 480                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id";
 481                 $sql = $dbr->limitResult($sql, 500, 0);
 482                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 483
 484                 if ( 0 == $dbr->numRows( $res ) ) {
 485                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 486                         return;
 487                 }
 488                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 489
 490                 $sk = $wgUser->getSkin();
 491                 while ( $s = $dbr->fetchObject( $res ) ) {
 492                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 493                         $link = $sk->makeKnownLinkObj( $name, "" );
 494                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 495                 }
 496                 $wgOut->addHTML( "</ul>\n" );
 497         }
 498
 499         function delete()
 500         {
 501                 global $wgUser, $wgOut, $wgRequest;
 502
 503                 $confirm = $wgRequest->wasPosted();
 504                 $reason = $wgRequest->getVal( 'wpReason' );
 505                 $image = $wgRequest->getVal( 'image' );
 506                 $oldimage = $wgRequest->getVal( 'oldimage' );
 507
 508                 # Only sysops can delete images. Previously ordinary users could delete
 509                 # old revisions, but this is no longer the case.
 510                 if ( !$wgUser->isAllowed('delete') ) {
 511                         $wgOut->permissionRequired( 'delete' );
 512                         return;
 513                 }
 514                 if ( $wgUser->isBlocked() ) {
 515                         $wgOut->blockedPage();
 516                         return;
 517                 }
 518                 if ( wfReadOnly() ) {
 519                         $wgOut->readOnlyPage();
 520                         return;
 521                 }
 522
 523                 # Better double-check that it hasn't been deleted yet!
 524                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 525                 if ( ( !is_null( $image ) )
 526                   && ( '' == trim( $image ) ) ) {
 527                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
 528                         return;
 529                 }
 530
 531                 $this->img  = new Image( $this->mTitle );
 532
 533                 # Deleting old images doesn't require confirmation
 534                 if ( !is_null( $oldimage ) || $confirm ) {
 535                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 536                                 $this->doDelete( $reason );
 537                         } else {
 538                                 $wgOut->showFatalError( wfMsg( 'sessionfailure' ) );
 539                         }
 540                         return;
 541                 }
 542
 543                 if ( !is_null( $image ) ) {
 544                         $q = '&image=' . urlencode( $image );
 545                 } else if ( !is_null( $oldimage ) ) {
 546                         $q = '&oldimage=' . urlencode( $oldimage );
 547                 } else {
 548                         $q = '';
 549                 }
 550                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 551         }
 552
 553         /*
 554          * Delete an image.
 555          * @param $reason User provided reason for deletion.
 556          */
 557         function doDelete( $reason ) {
 558                 global $wgOut, $wgRequest;
 559
 560                 $oldimage = $wgRequest->getVal( 'oldimage' );
 561
 562                 if ( !is_null( $oldimage ) ) {
 563                         if ( strlen( $oldimage ) < 16 ) {
 564                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 565                                 return;
 566                         }
 567                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 568                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 569                                 return;
 570                         }
 571                         if ( !$this->doDeleteOldImage( $oldimage ) ) {
 572                                 return;
 573                         }
 574                         $deleted = $oldimage;
 575                 } else {
 576                         $ok = $this->img->delete( $reason );
 577                         if( !$ok ) {
 578                                 # If the deletion operation actually failed, bug out:
 579                                 $wgOut->showFileDeleteError( $this->img->getName() );
 580                                 return;
 581                         }
 582
 583                         # Image itself is now gone, and database is cleaned.
 584                         # Now we remove the image description page.
 585
 586                         $article = new Article( $this->mTitle );
 587                         $article->doDeleteArticle( $reason ); # ignore errors
 588
 589                         $deleted = $this->img->getName();
 590                 }
 591
 592                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 593                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 594
 595                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
 596                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 597
 598                 $wgOut->addWikiText( $text );
 599
 600                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 601         }
 602
 603         /**
 604          * @return success
 605          */
 606         function doDeleteOldImage( $oldimage )
 607         {
 608                 global $wgOut;
 609
 610                 $ok = $this->img->deleteOld( $oldimage, '' );
 611                 if( !$ok ) {
 612                         # If we actually have a file and can't delete it, throw an error.
 613                         # Something went awry...
 614                         $wgOut->showFileDeleteError( "$oldimage" );
 615                 } else {
 616                         # Log the deletion
 617                         $log = new LogPage( 'delete' );
 618                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 619                 }
 620                 return $ok;
 621         }
 622
 623         function revert() {
 624                 global $wgOut, $wgRequest, $wgUser;
 625
 626                 $oldimage = $wgRequest->getText( 'oldimage' );
 627                 if ( strlen( $oldimage ) < 16 ) {
 628                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 629                         return;
 630                 }
 631                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 632                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 633                         return;
 634                 }
 635
 636                 if ( wfReadOnly() ) {
 637                         $wgOut->readOnlyPage();
 638                         return;
 639                 }
 640                 if( $wgUser->isAnon() ) {
 641                         $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 642                         return;
 643                 }
 644                 if ( ! $this->mTitle->userCan( 'edit' ) ) {
 645                         $wgOut->readOnlyPage( $this->getContent(), true );
 646                         return;
 647                 }
 648                 if ( $wgUser->isBlocked() ) {
 649                         $wgOut->blockedPage();
 650                         return;
 651                 }
 652                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 653                         $wgOut->showErrorPage( 'internalerror', 'sessionfailure' );
 654                         return;
 655                 }
 656                 $name = substr( $oldimage, 15 );
 657
 658                 $dest = wfImageDir( $name );
 659                 $archive = wfImageArchiveDir( $name );
 660                 $curfile = "{$dest}/{$name}";
 661
 662                 if ( !is_dir( $dest ) ) wfMkdirParents( $dest );
 663                 if ( !is_dir( $archive ) ) wfMkdirParents( $archive );
 664
 665                 if ( ! is_file( $curfile ) ) {
 666                         $wgOut->showFileNotFoundError( htmlspecialchars( $curfile ) );
 667                         return;
 668                 }
 669                 $oldver = wfTimestampNow() . "!{$name}";
 670
 671                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 672                         $wgOut->showFileRenameError( $curfile, "${archive}/{$oldver}" );
 673                         return;
 674                 }
 675                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 676                         $wgOut->showFileCopyError( "${archive}/{$oldimage}", $curfile );
 677                         return;
 678                 }
 679
 680                 # Record upload and update metadata cache
 681                 $img = Image::newFromName( $name );
 682                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 683
 684                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 685                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 686                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 687
 688                 $descTitle = $img->getTitle();
 689                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 690         }
 691
 692         /**
 693          * Override handling of action=purge
 694          */
 695         function doPurge() {
 696                 $this->img = new Image( $this->mTitle );
 697                 if( $this->img->exists() ) {
 698                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 699                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 700                         $update->doUpdate();
 701                         $this->img->upgradeRow();
 702                         $this->img->purgeCache();
 703                 } else {
 704                         wfDebug( "ImagePage::doPurge no image\n" );
 705                 }
 706                 parent::doPurge();
 707         }
 708
 709 }
 710
 711 /**
 712  * @todo document
 713  * @addtogroup Media
 714  */
 715 class ImageHistoryList {
 716         function ImageHistoryList( &$skin ) {
 717                 $this->skin =& $skin;
 718         }
 719
 720         function beginImageHistoryList() {
 721                 $s = "\n" .
 722                         Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'imghistory' ) ) .
 723                         "\n<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 724                 return $s;
 725         }
 726
 727         function endImageHistoryList() {
 728                 $s = "</ul>\n";
 729                 return $s;
 730         }
 731
 732         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description, $width, $height ) {
 733                 global $wgUser, $wgLang, $wgTitle, $wgContLang;
 734
 735                 $datetime = $wgLang->timeanddate( $timestamp, true );
 736                 $del = wfMsgHtml( 'deleteimg' );
 737                 $delall = wfMsgHtml( 'deleteimgcompletely' );
 738                 $cur = wfMsgHtml( 'cur' );
 739
 740                 if ( $iscur ) {
 741                         $url = Image::imageUrl( $img );
 742                         $rlink = $cur;
 743                         if ( $wgUser->isAllowed('delete') ) {
 744                                 $link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
 745                                   '&action=delete' );
 746                                 $style = $this->skin->getInternalLinkAttributes( $link, $delall );
 747
 748                                 $dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
 749                         } else {
 750                                 $dlink = $del;
 751                         }
 752                 } else {
 753                         $url = htmlspecialchars( wfImageArchiveUrl( $img ) );
 754                         if( $wgUser->getID() != 0 && $wgTitle->userCan( 'edit' ) ) {
 755                                 $token = urlencode( $wgUser->editToken( $img ) );
 756                                 $rlink = $this->skin->makeKnownLinkObj( $wgTitle,
 757                                            wfMsgHtml( 'revertimg' ), 'action=revert&oldimage=' .
 758                                            urlencode( $img ) . "&wpEditToken=$token" );
 759                                 $dlink = $this->skin->makeKnownLinkObj( $wgTitle,
 760                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 761                                            "&wpEditToken=$token" );
 762                         } else {
 763                                 # Having live active links for non-logged in users
 764                                 # means that bots and spiders crawling our site can
 765                                 # inadvertently change content. Baaaad idea.
 766                                 $rlink = wfMsgHtml( 'revertimg' );
 767                                 $dlink = $del;
 768                         }
 769                 }
 770
 771                 $userlink = $this->skin->userLink( $user, $usertext ) . $this->skin->userToolLinks( $user, $usertext );
 772                 $nbytes = wfMsgExt( 'nbytes', array( 'parsemag', 'escape' ),
 773                         $wgLang->formatNum( $size ) );
 774                 $widthheight = wfMsgHtml( 'widthheight', $width, $height );
 775                 $style = $this->skin->getInternalLinkAttributes( $url, $datetime );
 776
 777                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a> . . {$userlink} . . {$widthheight} ({$nbytes})";
 778
 779                 $s .= $this->skin->commentBlock( $description, $wgTitle );
 780                 $s .= "</li>\n";
 781                 return $s;
 782         }
 783
 784 }
 785
 786
 787 ?>