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         function __construct( $title ) {
  22                 parent::__construct( $title );
  23                 $this->img = wfFindFile( $this->mTitle );
  24                 if ( !$this->img ) {
  25                         $this->img = wfLocalFile( $this->mTitle );
  26                 }
  27         }
  28
  29         /**
  30          * Handler for action=render
  31          * Include body text only; none of the image extras
  32          */
  33         function render() {
  34                 global $wgOut;
  35                 $wgOut->setArticleBodyOnly( true );
  36                 $wgOut->addSecondaryWikitext( $this->getContent() );
  37         }
  38
  39         function view() {
  40                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  41
  42                 $diff = $wgRequest->getVal( 'diff' );
  43                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  44
  45                 if ( $this->mTitle->getNamespace() != NS_IMAGE || ( isset( $diff ) && $diffOnly ) )
  46                         return Article::view();
  47
  48                 if ($wgShowEXIF && $this->img->exists()) {
  49                         $exif = $this->img->getExifData();
  50                         $showmeta = count($exif) ? true : false;
  51                 } else {
  52                         $exif = false;
  53                         $showmeta = false;
  54                 }
  55
  56                 if ($this->img->exists())
  57                         $wgOut->addHTML($this->showTOC($showmeta));
  58
  59                 $this->openShowImage();
  60
  61                 # No need to display noarticletext, we use our own message, output in openShowImage()
  62                 if ( $this->getID() ) {
  63                         Article::view();
  64                 } else {
  65                         # Just need to set the right headers
  66                         $wgOut->setArticleFlag( true );
  67                         $wgOut->setRobotpolicy( 'index,follow' );
  68                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  69                         $this->viewUpdates();
  70                 }
  71
  72                 # Show shared description, if needed
  73                 if ( $this->mExtraDescription ) {
  74                         $fol = wfMsg( 'shareddescriptionfollows' );
  75                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
  76                                 $wgOut->addWikiText( $fol );
  77                         }
  78                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
  79                 }
  80
  81                 $this->closeShowImage();
  82                 $this->imageHistory();
  83                 $this->imageLinks();
  84
  85                 if ( $exif ) {
  86                         global $wgStylePath, $wgStyleVersion;
  87                         $expand = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-expand' ) ) );
  88                         $collapse = htmlspecialchars( wfEscapeJsString( wfMsg( 'metadata-collapse' ) ) );
  89                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
  90                         $wgOut->addWikiText( $this->makeMetadataTable( $exif ) );
  91                         $wgOut->addHTML(
  92                                 "<script type=\"text/javascript\" src=\"$wgStylePath/common/metadata.js?$wgStyleVersion\"></script>\n" .
  93                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
  94                 }
  95         }
  96
  97         /**
  98          * Create the TOC
  99          *
 100          * @access private
 101          *
 102          * @param bool $metadata Whether or not to show the metadata link
 103          * @return string
 104          */
 105         function showTOC( $metadata ) {
 106                 global $wgLang;
 107                 $r = '<ul id="filetoc">
 108                         <li><a href="#file">' . $wgLang->getNsText( NS_IMAGE ) . '</a></li>
 109                         <li><a href="#filehistory">' . wfMsgHtml( 'imghistory' ) . '</a></li>
 110                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 111                         ($metadata ? ' <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 112                 </ul>';
 113                 return $r;
 114         }
 115
 116         /**
 117          * Make a table with metadata to be shown in the output page.
 118          *
 119          * @access private
 120          *
 121          * @param array $exif The array containing the EXIF data
 122          * @return string
 123          */
 124         function makeMetadataTable( $exif ) {
 125                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 126                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 127                 $visibleFields = $this->visibleMetadataFields();
 128                 foreach( $exif as $k => $v ) {
 129                         $tag = strtolower( $k );
 130                         $msg = wfMsg( "exif-$tag" );
 131                         $class = "exif-$tag";
 132                         if( !in_array( $tag, $visibleFields ) ) {
 133                                 $class .= ' collapsable';
 134                         }
 135                         $r .= "|- class=\"$class\"\n";
 136                         $r .= "!| $msg\n";
 137                         $r .= "|| $v\n";
 138                 }
 139                 $r .= '|}';
 140                 return $r;
 141         }
 142
 143         /**
 144          * Get a list of EXIF metadata items which should be displayed when
 145          * the metadata table is collapsed.
 146          *
 147          * @return array of strings
 148          * @access private
 149          */
 150         function visibleMetadataFields() {
 151                 $fields = array();
 152                 $lines = explode( "\n", wfMsgForContent( 'metadata-fields' ) );
 153                 foreach( $lines as $line ) {
 154                         $matches = array();
 155                         if( preg_match( '/^\\*\s*(.*?)\s*$/', $line, $matches ) ) {
 156                                 $fields[] = $matches[1];
 157                         }
 158                 }
 159                 return $fields;
 160         }
 161
 162         /**
 163          * Overloading Article's getContent method.
 164          *
 165          * Omit noarticletext if sharedupload; text will be fetched from the
 166          * shared upload server if possible.
 167          */
 168         function getContent() {
 169                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 170                         return '';
 171                 }
 172                 return Article::getContent();
 173         }
 174
 175         function openShowImage() {
 176                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang;
 177
 178                 $full_url  = $this->img->getURL();
 179                 $linkAttribs = false;
 180                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 181                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 182                         $sizeSel = User::getDefaultOption( 'imagesize' );
 183
 184                         // The user offset might still be incorrect, specially if
 185                         // $wgImageLimits got changed (see bug #8858).
 186                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 187                                 // Default to the first offset in $wgImageLimits
 188                                 $sizeSel = 0;
 189                         }
 190                 }
 191                 $max = $wgImageLimits[$sizeSel];
 192                 $maxWidth = $max[0];
 193                 $maxHeight = $max[1];
 194                 $sk = $wgUser->getSkin();
 195
 196                 if ( $this->img->exists() ) {
 197                         # image
 198                         $page = $wgRequest->getIntOrNull( 'page' );
 199                         if ( is_null( $page ) ) {
 200                                 $params = array();
 201                                 $page = 1;
 202                         } else {
 203                                 $params = array( 'page' => $page );
 204                         }
 205                         $width_orig = $this->img->getWidth();
 206                         $width = $width_orig;
 207                         $height_orig = $this->img->getHeight();
 208                         $height = $height_orig;
 209                         $mime = $this->img->getMimeType();
 210                         $showLink = false;
 211                         $linkAttribs = array( 'href' => $full_url );
 212
 213       wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) ) ;
 214
 215                         if ( $this->img->allowInlineDisplay() and $width and $height) {
 216                                 # image
 217
 218                                 # "Download high res version" link below the image
 219                                 $msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->img->getSize() ), $mime );
 220                                 # We'll show a thumbnail of this image
 221                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 222                                         # Calculate the thumbnail size.
 223                                         # First case, the limiting factor is the width, not the height.
 224                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 225                                                 $height = round( $height * $maxWidth / $width);
 226                                                 $width = $maxWidth;
 227                                                 # Note that $height <= $maxHeight now.
 228                                         } else {
 229                                                 $newwidth = floor( $width * $maxHeight / $height);
 230                                                 $height = round( $height * $newwidth / $width );
 231                                                 $width = $newwidth;
 232                                                 # Note that $height <= $maxHeight now, but might not be identical
 233                                                 # because of rounding.
 234                                         }
 235                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 236                                         $msgsmall = wfMsgExt( 'show-big-image-thumb',
 237                                                 array( 'parseinline' ), $width, $height );
 238                                 } else {
 239                                         # Image is small enough to show full size on image page
 240                                         $msgbig = htmlspecialchars( $this->img->getName() );
 241                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 242                                 }
 243
 244                                 $params['width'] = $width;
 245                                 $thumbnail = $this->img->transform( $params );
 246
 247                                 $anchorclose = "<br />";
 248                                 if( $this->img->mustRender() ) {
 249                                         $showLink = true;
 250                                 } else {
 251                                         $anchorclose .=
 252                                                 $msgsmall .
 253                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . ' ' . $msgsize;
 254                                 }
 255
 256                                 if ( $this->img->isMultipage() ) {
 257                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 258                                 }
 259
 260                                 $imgAttribs = array(
 261                                         'border' => 0,
 262                                         'alt' => $this->img->getTitle()->getPrefixedText()
 263                                 );
 264
 265                                 if ( $thumbnail ) {
 266                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 267                                                 $thumbnail->toHtml( $imgAttribs, $linkAttribs ) .
 268                                                 $anchorclose . '</div>' );
 269                                 }
 270
 271                                 if ( $this->img->isMultipage() ) {
 272                                         $count = $this->img->pageCount();
 273
 274                                         if ( $page > 1 ) {
 275                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 276                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 277                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 278                                                         array( 'page' => $page - 1 ) );
 279                                         } else {
 280                                                 $thumb1 = '';
 281                                         }
 282
 283                                         if ( $page < $count ) {
 284                                                 $label = wfMsg( 'imgmultipagenext' );
 285                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 286                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->img, $link, $label, 'none',
 287                                                         array( 'page' => $page + 1 ) );
 288                                         } else {
 289                                                 $thumb2 = '';
 290                                         }
 291
 292                                         global $wgScript;
 293                                         $select = '<form name="pageselector" action="' .
 294                                                 htmlspecialchars( $wgScript ) .
 295                                                 '" method="get" onchange="document.pageselector.submit();">' .
 296                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() );
 297                                         $select .= $wgOut->parse( wfMsg( 'imgmultigotopre' ), false ) .
 298                                                 ' <select id="pageselector" name="page">';
 299                                         for ( $i=1; $i <= $count; $i++ ) {
 300                                                 $select .= Xml::option( $wgLang->formatNum( $i ), $i,
 301                                                         $i == $page );
 302                                         }
 303                                         $select .= '</select>' . $wgOut->parse( wfMsg( 'imgmultigotopost' ), false ) .
 304                                                 '<input type="submit" value="' .
 305                                                 htmlspecialchars( wfMsg( 'imgmultigo' ) ) . '"></form>';
 306
 307                                         $wgOut->addHTML( '</td><td><div class="multipageimagenavbox">' .
 308                                                 "$select<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>" );
 309                                 }
 310                         } else {
 311                                 #if direct link is allowed but it's not a renderable image, show an icon.
 312                                 if ($this->img->isSafeFile()) {
 313                                         $icon= $this->img->iconThumb();
 314
 315                                         $wgOut->addHTML( '<div class="fullImageLink" id="file"><a href="' . $full_url . '">' .
 316                                         $icon->toHtml() .
 317                                         '</a></div>' );
 318                                 }
 319
 320                                 $showLink = true;
 321                         }
 322
 323
 324                         if ($showLink) {
 325                                 // Workaround for incorrect MIME type on SVGs uploaded in previous versions
 326                                 if ($mime == 'image/svg') $mime = 'image/svg+xml';
 327
 328                                 $filename = wfEscapeWikiText( $this->img->getName() );
 329                                 $info = wfMsg( 'file-info', $sk->formatSize( $this->img->getSize() ), $mime );
 330                                 $infores = '';
 331
 332                                 // Check for MIME type. Other types may have more information in the future.
 333                                 if (substr($mime,0,9) == 'image/svg' ) {
 334                                         $infores = wfMsg('file-svg', $width_orig, $height_orig ) . '<br />';
 335                                 }
 336
 337                                 global $wgContLang;
 338                                 $dirmark = $wgContLang->getDirMark();
 339                                 if (!$this->img->isSafeFile()) {
 340                                         $warning = wfMsg( 'mediawarning' );
 341                                         $wgOut->addWikiText( <<<EOT
 342 <div class="fullMedia">$infores
 343 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 344 <span class="fileInfo"> $info</span>
 345 </div>
 346
 347 <div class="mediaWarning">$warning</div>
 348 EOT
 349                                                 );
 350                                 } else {
 351                                         $wgOut->addWikiText( <<<EOT
 352 <div class="fullMedia">$infores
 353 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $info</span>
 354 </div>
 355 EOT
 356                                                 );
 357                                 }
 358                         }
 359
 360                         if(!$this->img->isLocal()) {
 361                                 $this->printSharedImageText();
 362                         }
 363                 } else {
 364                         # Image does not exist
 365
 366                         $title = SpecialPage::getTitleFor( 'Upload' );
 367                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 368                                 'wpDestFile=' . urlencode( $this->img->getName() ) );
 369                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 370                 }
 371         }
 372
 373         function printSharedImageText() {
 374                 global $wgOut, $wgUser;
 375
 376                 $descUrl = $this->img->getDescriptionUrl();
 377                 $descText = $this->img->getDescriptionText();
 378                 $s = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml("sharedupload");
 379                 if ( $descUrl && !$descText) {
 380                         $sk = $wgUser->getSkin();
 381                         $link = $sk->makeExternalLink( $descUrl, wfMsg('shareduploadwiki-linktext') );
 382                         $s .= " " . wfMsgWikiHtml('shareduploadwiki', $link);
 383                 }
 384                 $s .= "</div>";
 385                 $wgOut->addHTML($s);
 386
 387                 if ( $descText ) {
 388                         $this->mExtraDescription = $descText;
 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->isLocal() )
 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, $this->img );
 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                 $this->img->resetHistory();     // free db resources
 464
 465                 # Exist check because we don't want to show this on pages where an image
 466                 # doesn't exist along with the noimage message, that would suck. -ævar
 467                 if( $wgUseExternalEditor && $this->img->exists() ) {
 468                         $this->uploadLinksBox();
 469                 }
 470
 471         }
 472
 473         function imageLinks()
 474         {
 475                 global $wgUser, $wgOut;
 476
 477                 $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'filelinks' ), wfMsg( 'imagelinks' ) ) . "\n" );
 478
 479                 $dbr = wfGetDB( DB_SLAVE );
 480                 $page = $dbr->tableName( 'page' );
 481                 $imagelinks = $dbr->tableName( 'imagelinks' );
 482
 483                 $sql = "SELECT page_namespace,page_title FROM $imagelinks,$page WHERE il_to=" .
 484                   $dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=page_id";
 485                 $sql = $dbr->limitResult($sql, 500, 0);
 486                 $res = $dbr->query( $sql, "ImagePage::imageLinks" );
 487
 488                 if ( 0 == $dbr->numRows( $res ) ) {
 489                         $wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
 490                         return;
 491                 }
 492                 $wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) .  "</p>\n<ul>" );
 493
 494                 $sk = $wgUser->getSkin();
 495                 while ( $s = $dbr->fetchObject( $res ) ) {
 496                         $name = Title::MakeTitle( $s->page_namespace, $s->page_title );
 497                         $link = $sk->makeKnownLinkObj( $name, "" );
 498                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 499                 }
 500                 $wgOut->addHTML( "</ul>\n" );
 501         }
 502
 503         function delete()
 504         {
 505                 global $wgUser, $wgOut, $wgRequest;
 506
 507                 if ( !$this->img->exists() || !$this->img->isLocal() ) {
 508                         # Use standard article deletion
 509                         Article::delete();
 510                         return;
 511                 }
 512
 513                 $confirm = $wgRequest->wasPosted();
 514                 $reason = $wgRequest->getVal( 'wpReason' );
 515                 $image = $wgRequest->getVal( 'image' );
 516                 $oldimage = $wgRequest->getVal( 'oldimage' );
 517
 518                 # Only sysops can delete images. Previously ordinary users could delete
 519                 # old revisions, but this is no longer the case.
 520                 if ( !$wgUser->isAllowed('delete') ) {
 521                         $wgOut->permissionRequired( 'delete' );
 522                         return;
 523                 }
 524                 if ( $wgUser->isBlocked() ) {
 525                         $wgOut->blockedPage();
 526                         return;
 527                 }
 528                 if ( wfReadOnly() ) {
 529                         $wgOut->readOnlyPage();
 530                         return;
 531                 }
 532
 533                 # Better double-check that it hasn't been deleted yet!
 534                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
 535                 if ( ( !is_null( $image ) )
 536                   && ( '' == trim( $image ) ) ) {
 537                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
 538                         return;
 539                 }
 540
 541                 # Deleting old images doesn't require confirmation
 542                 if ( !is_null( $oldimage ) || $confirm ) {
 543                         if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 544                                 $this->doDeleteImage( $reason );
 545                         } else {
 546                                 $wgOut->showFatalError( wfMsg( 'sessionfailure' ) );
 547                         }
 548                         return;
 549                 }
 550
 551                 if ( !is_null( $image ) ) {
 552                         $q = '&image=' . urlencode( $image );
 553                 } else if ( !is_null( $oldimage ) ) {
 554                         $q = '&oldimage=' . urlencode( $oldimage );
 555                 } else {
 556                         $q = '';
 557                 }
 558                 return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
 559         }
 560
 561         /*
 562          * Delete an image.
 563          * Called doDeleteImage() not doDelete() so that Article::delete() doesn't
 564          * call back to here.
 565          *
 566          * @param $reason User provided reason for deletion.
 567          */
 568         function doDeleteImage( $reason ) {
 569                 global $wgOut, $wgRequest;
 570
 571                 $oldimage = $wgRequest->getVal( 'oldimage' );
 572
 573                 if ( !is_null( $oldimage ) ) {
 574                         if ( strlen( $oldimage ) < 16 ) {
 575                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 576                                 return;
 577                         }
 578                         if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 579                                 $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 580                                 return;
 581                         }
 582                         if ( !$this->doDeleteOldImage( $oldimage ) ) {
 583                                 return;
 584                         }
 585                         $deleted = $oldimage;
 586                 } else {
 587                         $ok = $this->img->delete( $reason );
 588                         if( !$ok ) {
 589                                 # If the deletion operation actually failed, bug out:
 590                                 $wgOut->showFileDeleteError( $this->img->getName() );
 591                                 return;
 592                         }
 593
 594                         # Image itself is now gone, and database is cleaned.
 595                         # Now we remove the image description page.
 596
 597                         $article = new Article( $this->mTitle );
 598                         $article->doDeleteArticle( $reason ); # ignore errors
 599
 600                         $deleted = $this->img->getName();
 601                 }
 602
 603                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 604                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 605
 606                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
 607                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
 608
 609                 $wgOut->addWikiText( $text );
 610
 611                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedText() );
 612         }
 613
 614         /**
 615          * @return success
 616          */
 617         function doDeleteOldImage( $oldimage )
 618         {
 619                 global $wgOut;
 620
 621                 $ok = $this->img->deleteOld( $oldimage, '' );
 622                 if( !$ok ) {
 623                         # If we actually have a file and can't delete it, throw an error.
 624                         # Something went awry...
 625                         $wgOut->showFileDeleteError( "$oldimage" );
 626                 } else {
 627                         # Log the deletion
 628                         $log = new LogPage( 'delete' );
 629                         $log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
 630                 }
 631                 return $ok;
 632         }
 633
 634         function revert() {
 635                 global $wgOut, $wgRequest, $wgUser;
 636
 637                 $oldimage = $wgRequest->getText( 'oldimage' );
 638                 if ( strlen( $oldimage ) < 16 ) {
 639                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 640                         return;
 641                 }
 642                 if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
 643                         $wgOut->showUnexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
 644                         return;
 645                 }
 646
 647                 if ( wfReadOnly() ) {
 648                         $wgOut->readOnlyPage();
 649                         return;
 650                 }
 651                 if( $wgUser->isAnon() ) {
 652                         $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 653                         return;
 654                 }
 655                 if ( ! $this->mTitle->userCan( 'edit' ) ) {
 656                         $wgOut->readOnlyPage( $this->getContent(), true );
 657                         return;
 658                 }
 659                 if ( $wgUser->isBlocked() ) {
 660                         $wgOut->blockedPage();
 661                         return;
 662                 }
 663                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
 664                         $wgOut->showErrorPage( 'internalerror', 'sessionfailure' );
 665                         return;
 666                 }
 667
 668                 $sourcePath = $this->img->getArchiveVirtualUrl( $oldimage );
 669                 $comment = wfMsg( "reverted" );
 670                 $result = $this->img->upload( $sourcePath, $comment, $comment );
 671
 672                 if ( WikiError::isError( $result ) ) {
 673                         $this->showError( $result );
 674                         return;
 675                 }
 676
 677                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
 678                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 679                 $wgOut->addHTML( wfMsg( 'imagereverted' ) );
 680
 681                 $descTitle = $this->img->getTitle();
 682                 $wgOut->returnToMain( false, $descTitle->getPrefixedText() );
 683         }
 684
 685         /**
 686          * Override handling of action=purge
 687          */
 688         function doPurge() {
 689                 if( $this->img->exists() ) {
 690                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 691                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 692                         $update->doUpdate();
 693                         $this->img->upgradeRow();
 694                         $this->img->purgeCache();
 695                 } else {
 696                         wfDebug( "ImagePage::doPurge no image\n" );
 697                 }
 698                 parent::doPurge();
 699         }
 700
 701         /**
 702          * Display an error from a wikitext-formatted WikiError object
 703          */
 704         function showError( WikiError $error ) {
 705                 global $wgOut;
 706                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 707                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 708                 $wgOut->setArticleRelated( false );
 709                 $wgOut->enableClientCache( false );
 710                 $wgOut->addWikiText( $error->getMessage() );
 711         }
 712
 713 }
 714
 715 /**
 716  * @todo document
 717  * @addtogroup Media
 718  */
 719 class ImageHistoryList {
 720         var $img, $skin;
 721         function ImageHistoryList( $skin, $img ) {
 722                 $this->skin = $skin;
 723                 $this->img = $img;
 724         }
 725
 726         function beginImageHistoryList() {
 727                 $s = "\n" .
 728                         Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'imghistory' ) ) .
 729                         "\n<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
 730                 return $s;
 731         }
 732
 733         function endImageHistoryList() {
 734                 $s = "</ul>\n";
 735                 return $s;
 736         }
 737
 738         function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description, $width, $height ) {
 739                 global $wgUser, $wgLang, $wgTitle, $wgContLang;
 740
 741                 $datetime = $wgLang->timeanddate( $timestamp, true );
 742                 $del = wfMsgHtml( 'deleteimg' );
 743                 $delall = wfMsgHtml( 'deleteimgcompletely' );
 744                 $cur = wfMsgHtml( 'cur' );
 745                 $local = $this->img->isLocal();
 746
 747                 if ( $iscur ) {
 748                         $url = htmlspecialchars( $this->img->getURL() );
 749                         $rlink = $cur;
 750                         if ( $local && $wgUser->isAllowed('delete') ) {
 751                                 $link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
 752                                   '&action=delete' );
 753                                 $style = $this->skin->getInternalLinkAttributes( $link, $delall );
 754
 755                                 $dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
 756                         } else {
 757                                 $dlink = $del;
 758                         }
 759                 } else {
 760                         $url = htmlspecialchars( $this->img->getArchiveUrl( $img ) );
 761                         if( $local && $wgUser->getID() != 0 && $wgTitle->userCan( 'edit' ) ) {
 762                                 $token = urlencode( $wgUser->editToken( $img ) );
 763                                 $rlink = $this->skin->makeKnownLinkObj( $wgTitle,
 764                                            wfMsgHtml( 'revertimg' ), 'action=revert&oldimage=' .
 765                                            urlencode( $img ) . "&wpEditToken=$token" );
 766                                 $dlink = $this->skin->makeKnownLinkObj( $wgTitle,
 767                                            $del, 'action=delete&oldimage=' . urlencode( $img ) .
 768                                            "&wpEditToken=$token" );
 769                         } else {
 770                                 # Having live active links for non-logged in users
 771                                 # means that bots and spiders crawling our site can
 772                                 # inadvertently change content. Baaaad idea.
 773                                 $rlink = wfMsgHtml( 'revertimg' );
 774                                 $dlink = $del;
 775                         }
 776                 }
 777
 778                 if ( $local ) {
 779                         $userlink = $this->skin->userLink( $user, $usertext ) . $this->skin->userToolLinks( $user, $usertext );
 780                 } else {
 781                         $userlink = htmlspecialchars( $usertext );
 782                 }
 783                 $nbytes = wfMsgExt( 'nbytes', array( 'parsemag', 'escape' ),
 784                         $wgLang->formatNum( $size ) );
 785                 $widthheight = wfMsgHtml( 'widthheight', $width, $height );
 786                 $style = $this->skin->getInternalLinkAttributes( $url, $datetime );
 787
 788                 $s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a> . . {$userlink} . . {$widthheight} ({$nbytes})";
 789
 790                 $s .= $this->skin->commentBlock( $description, $wgTitle );
 791                 $s .= "</li>\n";
 792                 return $s;
 793         }
 794 }
 795
 796
 797