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' => $full_url );
 206
 207       wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) ) ;
 208
 209                         if ( $this->img->allowInlineDisplay() and $width and $height) {
 210                                 # image
 211
 212                                 # "Download high res version" link below the image
 213                                 $msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->img->getSize() ), $mime );
 214                                 # We'll show a thumbnail of this image
 215                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 216                                         # Calculate the thumbnail size.
 217                                         # First case, the limiting factor is the width, not the height.
 218                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 219                                                 $height = round( $height * $maxWidth / $width);
 220                                                 $width = $maxWidth;
 221                                                 # Note that $height <= $maxHeight now.
 222                                         } else {
 223                                                 $newwidth = floor( $width * $maxHeight / $height);
 224                                                 $height = round( $height * $newwidth / $width );
 225                                                 $width = $newwidth;
 226                                                 # Note that $height <= $maxHeight now, but might not be identical
 227                                                 # because of rounding.
 228                                         }
 229                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 230                                         $msgsmall = wfMsgExt( 'show-big-image-thumb',
 231                                                 array( 'parseinline' ), $width, $height );
 232                                 } else {
 233                                         # Image is small enough to show full size on image page
 234                                         $msgbig = htmlspecialchars( $this->img->getName() );
 235                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 236                                 }
 237
 238                                 $params['width'] = $width;
 239                                 $thumbnail = $this->img->transform( $params );
 240
 241                                 $anchorclose = "<br />";
 242                                 if( $this->img->mustRender() ) {
 243                                         $showLink = true;
 244                                 } else {
 245                                         $anchorclose .=
 246                                                 $msgsmall .
 247                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . ' ' . $msgsize;
 248                                 }
 249
 250                                 if ( $this->img->isMultipage() ) {
 251                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 252                                 }
 253
 254                                 $imgAttribs = array(
 255                                         'border' => 0,
 256                                         'alt' => $this->img->getTitle()->getPrefixedText()
 257                                 );
 258
 259                                 if ( $thumbnail ) {
 260                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 261                                                 $thumbnail->toHtml( $imgAttribs, $linkAttribs ) .
 262                                                 $anchorclose . '</div>' );
 263                                 }
 264
 265                                 if ( $this->img->isMultipage() ) {
 266                                         $count = $this->img->pageCount();
 267
 268                                         if ( $page > 1 ) {
 269                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 270                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 271                                                 $thumb1 = $sk->makeThumbLinkObj( $this->img, $link, $label, 'none',
 272                                                         array( 'page' => $page - 1 ) );
 273                                         } else {
 274                                                 $thumb1 = '';
 275                                         }
 276
 277                                         if ( $page < $count ) {
 278                                                 $label = wfMsg( 'imgmultipagenext' );
 279                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 280                                                 $thumb2 = $sk->makeThumbLinkObj( $this->img, $link, $label, 'none',
 281                                                         array( 'page' => $page + 1 ) );
 282                                         } else {
 283                                                 $thumb2 = '';
 284                                         }
 285
 286                                         global $wgScript;
 287                                         $select = '<form name="pageselector" action="' .
 288                                                 htmlspecialchars( $wgScript ) .
 289                                                 '" method="get" onchange="document.pageselector.submit();">' .
 290                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() );
 291                                         $select .= $wgOut->parse( wfMsg( 'imgmultigotopre' ), false ) .
 292                                                 ' <select id="pageselector" name="page">';
 293                                         for ( $i=1; $i <= $count; $i++ ) {
 294                                                 $select .= Xml::option( $wgLang->formatNum( $i ), $i,
 295                                                         $i == $page );
 296                                         }
 297                                         $select .= '</select>' . $wgOut->parse( wfMsg( 'imgmultigotopost' ), false ) .
 298                                                 '<input type="submit" value="' .
 299                                                 htmlspecialchars( wfMsg( 'imgmultigo' ) ) . '"></form>';
 300
 301                                         $wgOut->addHTML( '</td><td><div class="multipageimagenavbox">' .
 302                                                 "$select<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>" );
 303                                 }
 304                         } else {
 305                                 #if direct link is allowed but it's not a renderable image, show an icon.
 306                                 if ($this->img->isSafeFile()) {
 307                                         $icon= $this->img->iconThumb();
 308
 309                                         $wgOut->addHTML( '<div class="fullImageLink" id="file"><a href="' . $full_url . '">' .
 310                                         $icon->toHtml() .
 311                                         '</a></div>' );
 312                                 }
 313
 314                                 $showLink = true;
 315                         }
 316
 317
 318                         if ($showLink) {
 319                                 // Workaround for incorrect MIME type on SVGs uploaded in previous versions
 320                                 if ($mime == 'image/svg') $mime = 'image/svg+xml';
 321
 322                                 $filename = wfEscapeWikiText( $this->img->getName() );
 323                                 $info = wfMsg( 'file-info', $sk->formatSize( $this->img->getSize() ), $mime );
 324                                 $infores = '';
 325
 326                                 // Check for MIME type. Other types may have more information in the future.
 327                                 if (substr($mime,0,9) == 'image/svg' ) {
 328                                         $infores = wfMsg('file-svg', $width_orig, $height_orig ) . '<br />';
 329                                 }
 330
 331                                 global $wgContLang;
 332                                 $dirmark = $wgContLang->getDirMark();
 333                                 if (!$this->img->isSafeFile()) {
 334                                         $warning = wfMsg( 'mediawarning' );
 335                                         $wgOut->addWikiText( <<<END
 336 <div class="fullMedia">$infores
 337 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 338 <span class="fileInfo"> $info</span>
 339 </div>
 340
 341 <div class="mediaWarning">$warning</div>
 342 END
 343                                                 );
 344                                 } else {
 345                                         $wgOut->addWikiText( <<<END
 346 <div class="fullMedia">$infores
 347 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $info</span>
 348 </div>
 349 END
 350                                                 );
 351                                 }
 352                         }
 353
 354                         if($this->img->fromSharedDirectory) {
 355                                 $this->printSharedImageText();
 356                         }
 357                 } else {
 358                         # Image does not exist
 359
 360                         $title = SpecialPage::getTitleFor( 'Upload' );
 361                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 362                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 363                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 364                 }
 365         }
 366
 367         function printSharedImageText() {
 368                 global $wgRepositoryBaseUrl, $wgFetchCommonsDescriptions, $wgOut, $wgUser;
 369
 370                 $url = $wgRepositoryBaseUrl . urlencode($this->mTitle->getDBkey());
 371                 $sharedtext = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml("sharedupload");
 372                 if ($wgRepositoryBaseUrl && !$wgFetchCommonsDescriptions) {
 373
 374                         $sk = $wgUser->getSkin();
 375                         $title = SpecialPage::getTitleFor( 'Upload' );
 376                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('shareduploadwiki-linktext'),
 377                         array( 'wpDestFile' => urlencode( $this->img->getName() )));
 378                         $sharedtext .= " " . wfMsgWikiHtml('shareduploadwiki', $link);
 379                 }
 380                 $sharedtext .= "</div>";
 381                 $wgOut->addHTML($sharedtext);
 382
 383                 if ($wgRepositoryBaseUrl && $wgFetchCommonsDescriptions) {
 384                         $renderUrl = wfAppendQuery( $url, 'action=render' );
 385                         wfDebug( "Fetching shared description from $renderUrl\n" );
 386                         $text = Http::get( $renderUrl );
 387                         if ($text)
 388                                 $this->mExtraDescription = $text;
 389                 }
 390         }
 391
 392         function getUploadUrl() {
 393                 global $wgServer;
 394                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 395                 return $wgServer . $uploadTitle->getLocalUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 396         }
 397
 398         /**
 399          * Print out the various links at the bottom of the image page, e.g. reupload,
 400          * external editing (and instructions link) etc.
 401          */
 402         function uploadLinksBox() {
 403                 global $wgUser, $wgOut;
 404
 405                 if( $this->img->fromSharedDirectory )
 406                         return;
 407
 408                 $sk = $wgUser->getSkin();
 409
 410                 $wgOut->addHtml( '<br /><ul>' );
 411
 412                 # "Upload a new version of this file" link
 413                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 414                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 415                         $wgOut->addHtml( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 416                 }
 417
 418                 # External editing link
 419                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 420                 $wgOut->addHtml( '<li>' . $elink . '<div>' . wfMsgWikiHtml( 'edit-externally-help' ) . '</div></li>' );
 421
 422                 $wgOut->addHtml( '</ul>' );
 423         }
 424
 425         function closeShowImage()
 426         {
 427                 # For overloading
 428
 429         }
 430
 431         /**
 432          * If the page we've just displayed is in the "Image" namespace,
 433          * we follow it with an upload history of the image and its usage.
 434          */
 435         function imageHistory()
 436         {
 437                 global $wgUser, $wgOut, $wgUseExternalEditor;
 438
 439                 $sk = $wgUser->getSkin();
 440
 441                 $line = $this->img->nextHistoryLine();
 442
 443                 if ( $line ) {
 444                         $list = new ImageHistoryList( $sk );
 445                         $s = $list->beginImageHistoryList() .
 446                                 $list->imageHistoryLine( true, wfTimestamp(TS_MW, $line->img_timestamp),
 447                                         $this->mTitle->getDBkey(),  $line->img_user,
 448                                         $line->img_user_text, $line->img_size, $line->img_description,
 449                                         $line->img_width, $line->img_height
 450                                 );
 451
 452                         while ( $line = $this->img->nextHistoryLine() ) {
 453                                 $s .= $list->imageHistoryLine( false, $line->img_timestamp,
 454                                         $line->oi_archive_name, $line->img_user,
 455                                         $line->img_user_text, $line->img_size, $line->img_description,
 456                                         $line->img_width, $line->img_height
 457                                 );
 458                         }
 459                         $s .= $list->endImageHistoryList();
 460                 } else { $s=''; }
 461                 $wgOut->addHTML( $s );
 462
 463                 # Exist check because we don't want to show this on pages where an image
 464                 # doesn't exist along with the noimage message, that would suck. -ævar
 465                 if( $wgUseExternalEditor && $this->img->exists() ) {
 466                         $this->uploadLinksBox();
 467                 }
 468
 469         }
 470
 471         function imageLinks()
 472         {
 473                 global $wgUser, $wgOut;
 474
 475                 $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'filelinks' ), wfMsg( 'imagelinks' ) ) . "\n" );
 476
 477                 $dbr = wfGetDB( DB_SLAVE );
 478                 $page = $dbr->tableName( 'page' );
 479                 $imagelinks = $dbr->tableName( 'imagelinks' );
 480
 481                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 482                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id";
 483                 $sql = $dbr->limitResult($sql, 500, 0);
 484                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 485
 486                 if ( 0 == $dbr->numRows( $res ) ) {
 487                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 488                         return;
 489                 }
 490                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 491
 492                 $sk = $wgUser->getSkin();
 493                 while ( $s = $dbr->fetchObject( $res ) ) {
 494                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 495                         $link = $sk->makeKnownLinkObj( $name, "" );
 496                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 497                 }
 498                 $wgOut->addHTML( "</ul>\n" );
 499         }
 500
 501         function delete()
 502         {
 503                 global $wgUser, $wgOut, $wgRequest;
 504
 505                 $confirm = $wgRequest->wasPosted();
 506                 $reason = $wgRequest->getVal( 'wpReason' );
 507                 $image = $wgRequest->getVal( 'image' );
 508                 $oldimage = $wgRequest->getVal( 'oldimage' );
 509
 510                 # Only sysops can delete images. Previously ordinary users could delete
 511                 # old revisions, but this is no longer the case.
 512                 if ( !$wgUser->isAllowed('delete') ) {
 513                         $wgOut->permissionRequired( 'delete' );
 514                         return;
 515                 }
 516                 if ( $wgUser->isBlocked() ) {
 517                         $wgOut->blockedPage();
 518                         return;
 519                 }
 520                 if ( wfReadOnly() ) {
 521                         $wgOut->readOnlyPage();
 522                         return;
 523                 }
 524
 525                 # Better double-check that it hasn't been deleted yet!
 526                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 527                 if ( ( !is_null( $image ) )
 528                   && ( '' == trim( $image ) ) ) {
 529                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
 530                         return;
 531                 }
 532
 533                 $this->img  = new Image( $this->mTitle );
 534
 535                 # Deleting old images doesn't require confirmation
 536                 if ( !is_null( $oldimage ) || $confirm ) {
 537                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 538                                 $this->doDelete( $reason );
 539                         } else {
 540                                 $wgOut->showFatalError( wfMsg( 'sessionfailure' ) );
 541                         }
 542                         return;
 543                 }
 544
 545                 if ( !is_null( $image ) ) {
 546                         $q = '&image=' . urlencode( $image );
 547                 } else if ( !is_null( $oldimage ) ) {
 548                         $q = '&oldimage=' . urlencode( $oldimage );
 549                 } else {
 550                         $q = '';
 551                 }
 552                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 553         }
 554
 555         /*
 556          * Delete an image.
 557          * @param $reason User provided reason for deletion.
 558          */
 559         function doDelete( $reason ) {
 560                 global $wgOut, $wgRequest;
 561
 562                 $oldimage = $wgRequest->getVal( 'oldimage' );
 563
 564                 if ( !is_null( $oldimage ) ) {
 565                         if ( strlen( $oldimage ) < 16 ) {
 566                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 567                                 return;
 568                         }
 569                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 570                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 571                                 return;
 572                         }
 573                         if ( !$this->doDeleteOldImage( $oldimage ) ) {
 574                                 return;
 575                         }
 576                         $deleted = $oldimage;
 577                 } else {
 578                         $ok = $this->img->delete( $reason );
 579                         if( !$ok ) {
 580                                 # If the deletion operation actually failed, bug out:
 581                                 $wgOut->showFileDeleteError( $this->img->getName() );
 582                                 return;
 583                         }
 584
 585                         # Image itself is now gone, and database is cleaned.
 586                         # Now we remove the image description page.
 587
 588                         $article = new Article( $this->mTitle );
 589                         $article->doDeleteArticle( $reason ); # ignore errors
 590
 591                         $deleted = $this->img->getName();
 592                 }
 593
 594                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 595                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 596
 597                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
 598                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 599
 600                 $wgOut->addWikiText( $text );
 601
 602                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 603         }
 604
 605         /**
 606          * @return success
 607          */
 608         function doDeleteOldImage( $oldimage )
 609         {
 610                 global $wgOut;
 611
 612                 $ok = $this->img->deleteOld( $oldimage, '' );
 613                 if( !$ok ) {
 614                         # If we actually have a file and can't delete it, throw an error.
 615                         # Something went awry...
 616                         $wgOut->showFileDeleteError( "$oldimage" );
 617                 } else {
 618                         # Log the deletion
 619                         $log = new LogPage( 'delete' );
 620                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 621                 }
 622                 return $ok;
 623         }
 624
 625         function revert() {
 626                 global $wgOut, $wgRequest, $wgUser;
 627
 628                 $oldimage = $wgRequest->getText( 'oldimage' );
 629                 if ( strlen( $oldimage ) < 16 ) {
 630                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 631                         return;
 632                 }
 633                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 634                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 635                         return;
 636                 }
 637
 638                 if ( wfReadOnly() ) {
 639                         $wgOut->readOnlyPage();
 640                         return;
 641                 }
 642                 if( $wgUser->isAnon() ) {
 643                         $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 644                         return;
 645                 }
 646                 if ( ! $this->mTitle->userCan( 'edit' ) ) {
 647                         $wgOut->readOnlyPage( $this->getContent(), true );
 648                         return;
 649                 }
 650                 if ( $wgUser->isBlocked() ) {
 651                         $wgOut->blockedPage();
 652                         return;
 653                 }
 654                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 655                         $wgOut->showErrorPage( 'internalerror', 'sessionfailure' );
 656                         return;
 657                 }
 658                 $name = substr( $oldimage, 15 );
 659
 660                 $dest = wfImageDir( $name );
 661                 $archive = wfImageArchiveDir( $name );
 662                 $curfile = "{$dest}/{$name}";
 663
 664                 if ( !is_dir( $dest ) ) wfMkdirParents( $dest );
 665                 if ( !is_dir( $archive ) ) wfMkdirParents( $archive );
 666
 667                 if ( ! is_file( $curfile ) ) {
 668                         $wgOut->showFileNotFoundError( htmlspecialchars( $curfile ) );
 669                         return;
 670                 }
 671                 $oldver = wfTimestampNow() . "!{$name}";
 672
 673                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
 674                         $wgOut->showFileRenameError( $curfile, "${archive}/{$oldver}" );
 675                         return;
 676                 }
 677                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
 678                         $wgOut->showFileCopyError( "${archive}/{$oldimage}", $curfile );
 679                         return;
 680                 }
 681
 682                 # Record upload and update metadata cache
 683                 $img = Image::newFromName( $name );
 684                 $img->recordUpload( $oldver, wfMsg( "reverted" ) );
 685
 686                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 687                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 688                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 689
 690                 $descTitle = $img->getTitle();
 691                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 692         }
 693
 694         /**
 695          * Override handling of action=purge
 696          */
 697         function doPurge() {
 698                 $this->img = new Image( $this->mTitle );
 699                 if( $this->img->exists() ) {
 700                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 701                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 702                         $update->doUpdate();
 703                         $this->img->upgradeRow();
 704                         $this->img->purgeCache();
 705                 } else {
 706                         wfDebug( "ImagePage::doPurge no image\n" );
 707                 }
 708                 parent::doPurge();
 709         }
 710
 711 }
 712
 713 /**
 714  * @todo document
 715  * @addtogroup Media
 716  */
 717 class ImageHistoryList {
 718         function ImageHistoryList( &$skin ) {
 719                 $this->skin =& $skin;
 720         }
 721
 722         function beginImageHistoryList() {
 723                 $s = "\n" .
 724                         Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'imghistory' ) ) .
 725                         "\n<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 726                 return $s;
 727         }
 728
 729         function endImageHistoryList() {
 730                 $s = "</ul>\n";
 731                 return $s;
 732         }
 733
 734         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description, $width, $height ) {
 735                 global $wgUser, $wgLang, $wgTitle, $wgContLang;
 736
 737                 $datetime = $wgLang->timeanddate( $timestamp, true );
 738                 $del = wfMsgHtml( 'deleteimg' );
 739                 $delall = wfMsgHtml( 'deleteimgcompletely' );
 740                 $cur = wfMsgHtml( 'cur' );
 741
 742                 if ( $iscur ) {
 743                         $url = Image::imageUrl( $img );
 744                         $rlink = $cur;
 745                         if ( $wgUser->isAllowed('delete') ) {
 746                                 $link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
 747                                   '&action=delete' );
 748                                 $style = $this->skin->getInternalLinkAttributes( $link, $delall );
 749
 750                                 $dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
 751                         } else {
 752                                 $dlink = $del;
 753                         }
 754                 } else {
 755                         $url = htmlspecialchars( wfImageArchiveUrl( $img ) );
 756                         if( $wgUser->getID() != 0 && $wgTitle->userCan( 'edit' ) ) {
 757                                 $token = urlencode( $wgUser->editToken( $img ) );
 758                                 $rlink = $this->skin->makeKnownLinkObj( $wgTitle,
 759                                            wfMsgHtml( 'revertimg' ), 'action=revert&oldimage=' .
 760                                            urlencode( $img ) . "&wpEditToken=$token" );
 761                                 $dlink = $this->skin->makeKnownLinkObj( $wgTitle,
 762                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 763                                            "&wpEditToken=$token" );
 764                         } else {
 765                                 # Having live active links for non-logged in users
 766                                 # means that bots and spiders crawling our site can
 767                                 # inadvertently change content. Baaaad idea.
 768                                 $rlink = wfMsgHtml( 'revertimg' );
 769                                 $dlink = $del;
 770                         }
 771                 }
 772
 773                 $userlink = $this->skin->userLink( $user, $usertext ) . $this->skin->userToolLinks( $user, $usertext );
 774                 $nbytes = wfMsgExt( 'nbytes', array( 'parsemag', 'escape' ),
 775                         $wgLang->formatNum( $size ) );
 776                 $widthheight = wfMsgHtml( 'widthheight', $width, $height );
 777                 $style = $this->skin->getInternalLinkAttributes( $url, $datetime );
 778
 779                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a> . . {$userlink} . . {$widthheight} ({$nbytes})";
 780
 781                 $s .= $this->skin->commentBlock( $description, $wgTitle );
 782                 $s .= "</li>\n";
 783                 return $s;
 784         }
 785
 786 }
 787
 788
 789 ?>