includes/ImagePage.php

   1 <?php
   2
   3 if( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 /**
   7  * Special handling for image description pages
   8  *
   9  * @ingroup Media
  10  */
  11 class ImagePage extends Article {
  12
  13         /* private */ var $img;  // Image object
  14         /* private */ var $displayImg;
  15         /* private */ var $repo;
  16         /* private */ var $fileLoaded;
  17         var $mExtraDescription = false;
  18         var $dupes;
  19
  20         function __construct( $title ) {
  21                 parent::__construct( $title );
  22                 $this->dupes = null;
  23                 $this->repo = null;
  24         }
  25
  26         public function setFile( $file ) {
  27                 $this->displayImg = $file;
  28                 $this->img = $file;
  29                 $this->fileLoaded = true;
  30         }
  31
  32         protected function loadFile() {
  33                 if( $this->fileLoaded ) {
  34                         return true;
  35                 }
  36                 $this->fileLoaded = true;
  37
  38                 $this->displayImg = $this->img = false;
  39                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  40                 if( !$this->img ) {
  41                         $this->img = wfFindFile( $this->mTitle );
  42                         if( !$this->img ) {
  43                                 $this->img = wfLocalFile( $this->mTitle );
  44                         }
  45                 }
  46                 if( !$this->displayImg ) {
  47                         $this->displayImg = $this->img;
  48                 }
  49                 $this->repo = $this->img->getRepo();
  50         }
  51
  52         /**
  53          * Handler for action=render
  54          * Include body text only; none of the image extras
  55          */
  56         public function render() {
  57                 global $wgOut;
  58                 $wgOut->setArticleBodyOnly( true );
  59                 parent::view();
  60         }
  61
  62         public function view() {
  63                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  64                 $this->loadFile();
  65
  66                 if( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  67                         if( $this->mTitle->getDBkey() == $this->img->getName() ) {
  68                                 // mTitle is the same as the redirect target so ask Article
  69                                 // to perform the redirect for us.
  70                                 return Article::view();
  71                         } else {
  72                                 // mTitle is not the same as the redirect target so it is
  73                                 // probably the redirect page itself. Fake the redirect symbol
  74                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  75                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  76                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  77                                 $this->viewUpdates();
  78                                 return;
  79                         }
  80                 }
  81
  82                 $diff = $wgRequest->getVal( 'diff' );
  83                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  84
  85                 if( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) )
  86                         return Article::view();
  87
  88                 if( $wgShowEXIF && $this->displayImg->exists() ) {
  89                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  90                         $formattedMetadata = $this->displayImg->formatMetadata();
  91                         $showmeta = $formattedMetadata !== false;
  92                 } else {
  93                         $showmeta = false;
  94                 }
  95
  96                 if( !$diff && $this->displayImg->exists() )
  97                         $wgOut->addHTML( $this->showTOC($showmeta) );
  98
  99                 if( !$diff )
 100                         $this->openShowImage();
 101
 102                 # No need to display noarticletext, we use our own message, output in openShowImage()
 103                 if( $this->getID() ) {
 104                         Article::view();
 105                 } else {
 106                         # Just need to set the right headers
 107                         $wgOut->setArticleFlag( true );
 108                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 109                         $this->viewUpdates();
 110                 }
 111
 112                 # Show shared description, if needed
 113                 if( $this->mExtraDescription ) {
 114                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
 115                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
 116                                 $wgOut->addWikiText( $fol );
 117                         }
 118                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 119                 }
 120
 121                 $this->closeShowImage();
 122                 $this->imageHistory();
 123                 // TODO: Cleanup the following
 124
 125                 $wgOut->addHTML( Xml::element( 'h2',
 126                         array( 'id' => 'filelinks' ),
 127                         wfMsg( 'imagelinks' ) ) . "\n" );
 128                 $this->imageDupes();
 129                 # TODO! FIXME! For some freaky reason, we can't redirect to foreign images.
 130                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 131                 $this->imageRedirects();
 132                 $this->imageLinks();
 133
 134                 if( $showmeta ) {
 135                         global $wgStylePath, $wgStyleVersion;
 136                         $expand = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-expand' ) ) );
 137                         $collapse = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-collapse' ) ) );
 138                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 139                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 140                         $wgOut->addScriptFile( 'metadata.js' );
 141                         $wgOut->addHTML(
 142                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 143                 }
 144         }
 145
 146         public function getRedirectTarget() {
 147                 $this->loadFile();
 148                 if( $this->img->isLocal() ) {
 149                         return parent::getRedirectTarget();
 150                 }
 151                 // Foreign image page
 152                 $from = $this->img->getRedirected();
 153                 $to = $this->img->getName();
 154                 if( $from == $to ) {
 155                         return null;
 156                 }
 157                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 158         }
 159         public function followRedirect() {
 160                 $this->loadFile();
 161                 if( $this->img->isLocal() ) {
 162                         return parent::followRedirect();
 163                 }
 164                 $from = $this->img->getRedirected();
 165                 $to = $this->img->getName();
 166                 if( $from == $to ) {
 167                         return false;
 168                 }
 169                 return Title::makeTitle( NS_FILE, $to );
 170         }
 171         public function isRedirect( $text = false ) {
 172                 $this->loadFile();
 173                 if( $this->img->isLocal() )
 174                         return parent::isRedirect( $text );
 175
 176                 return (bool)$this->img->getRedirected();
 177         }
 178
 179         public function isLocal() {
 180                 $this->loadFile();
 181                 return $this->img->isLocal();
 182         }
 183
 184         public function getFile() {
 185                 $this->loadFile();
 186                 return $this->img;
 187         }
 188
 189         public function getDisplayedFile() {
 190                 $this->loadFile();
 191                 return $this->displayImg;
 192         }
 193
 194         public function getDuplicates() {
 195                 $this->loadFile();
 196                 if( !is_null($this->dupes) ) {
 197                         return $this->dupes;
 198                 }
 199                 if( !( $hash = $this->img->getSha1() ) ) {
 200                         return $this->dupes = array();
 201                 }
 202                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 203                 // Remove duplicates with self and non matching file sizes
 204                 $self = $this->img->getRepoName().':'.$this->img->getName();
 205                 $size = $this->img->getSize();
 206                 foreach ( $dupes as $index => $file ) {
 207                         $key = $file->getRepoName().':'.$file->getName();
 208                         if( $key == $self )
 209                                 unset( $dupes[$index] );
 210                         if( $file->getSize() != $size )
 211                                 unset( $dupes[$index] );
 212                 }
 213                 return $this->dupes = $dupes;
 214
 215         }
 216
 217
 218         /**
 219          * Create the TOC
 220          *
 221          * @param bool $metadata Whether or not to show the metadata link
 222          * @return string
 223          */
 224         protected function showTOC( $metadata ) {
 225                 global $wgLang;
 226                 $r = '<ul id="filetoc">
 227                         <li><a href="#file">' . $wgLang->getNsText( NS_FILE ) . '</a></li>
 228                         <li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>
 229                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . "</a></li>\n" .
 230                         ($metadata ? '                  <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . "
 231                         </ul>\n";
 232                 return $r;
 233         }
 234
 235         /**
 236          * Make a table with metadata to be shown in the output page.
 237          *
 238          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 239          *
 240          * @param array $exif The array containing the EXIF data
 241          * @return string
 242          */
 243         protected function makeMetadataTable( $metadata ) {
 244                 $r = "<div class=\"mw-imagepage-section-metadata\">\n";
 245                 $r .= wfMsg( 'metadata-help' );
 246                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 247                 foreach ( $metadata as $type => $stuff ) {
 248                         foreach ( $stuff as $v ) {
 249                                 # FIXME, why is this using escapeId for a class?!
 250                                 $class = Sanitizer::escapeId( $v['id'] );
 251                                 if( $type == 'collapsed' ) {
 252                                         $class .= ' collapsable';
 253                                 }
 254                                 $r .= "<tr class=\"$class\">\n";
 255                                 $r .= "<th>{$v['name']}</th>\n";
 256                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 257                         }
 258                 }
 259                 $r .= "</table>\n</div>\n";
 260                 return $r;
 261         }
 262
 263         /**
 264          * Overloading Article's getContent method.
 265          *
 266          * Omit noarticletext if sharedupload; text will be fetched from the
 267          * shared upload server if possible.
 268          */
 269         public function getContent() {
 270                 $this->loadFile();
 271                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 272                         return '';
 273                 }
 274                 return Article::getContent();
 275         }
 276
 277         protected function openShowImage() {
 278                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 279                         $wgLang, $wgContLang, $wgEnableUploads;
 280
 281                 $this->loadFile();
 282
 283                 $full_url  = $this->displayImg->getURL();
 284                 $linkAttribs = false;
 285                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 286                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 287                         $sizeSel = User::getDefaultOption( 'imagesize' );
 288
 289                         // The user offset might still be incorrect, specially if
 290                         // $wgImageLimits got changed (see bug #8858).
 291                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 292                                 // Default to the first offset in $wgImageLimits
 293                                 $sizeSel = 0;
 294                         }
 295                 }
 296                 $max = $wgImageLimits[$sizeSel];
 297                 $maxWidth = $max[0];
 298                 $maxHeight = $max[1];
 299                 $sk = $wgUser->getSkin();
 300                 $dirmark = $wgContLang->getDirMark();
 301
 302                 if( $this->displayImg->exists() ) {
 303                         # image
 304                         $page = $wgRequest->getIntOrNull( 'page' );
 305                         if( is_null( $page ) ) {
 306                                 $params = array();
 307                                 $page = 1;
 308                         } else {
 309                                 $params = array( 'page' => $page );
 310                         }
 311                         $width_orig = $this->displayImg->getWidth();
 312                         $width = $width_orig;
 313                         $height_orig = $this->displayImg->getHeight();
 314                         $height = $height_orig;
 315                         $mime = $this->displayImg->getMimeType();
 316                         $showLink = false;
 317                         $linkAttribs = array( 'href' => $full_url );
 318                         $longDesc = $this->displayImg->getLongDesc();
 319
 320                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) )       ;
 321
 322                         if( $this->displayImg->allowInlineDisplay() ) {
 323                                 # image
 324
 325                                 # "Download high res version" link below the image
 326                                 #$msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 327                                 # We'll show a thumbnail of this image
 328                                 if( $width > $maxWidth || $height > $maxHeight ) {
 329                                         # Calculate the thumbnail size.
 330                                         # First case, the limiting factor is the width, not the height.
 331                                         if( $width / $height >= $maxWidth / $maxHeight ) {
 332                                                 $height = round( $height * $maxWidth / $width);
 333                                                 $width = $maxWidth;
 334                                                 # Note that $height <= $maxHeight now.
 335                                         } else {
 336                                                 $newwidth = floor( $width * $maxHeight / $height);
 337                                                 $height = round( $height * $newwidth / $width );
 338                                                 $width = $newwidth;
 339                                                 # Note that $height <= $maxHeight now, but might not be identical
 340                                                 # because of rounding.
 341                                         }
 342                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 343                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 344                                                 $wgLang->formatNum( $width ),
 345                                                 $wgLang->formatNum( $height )
 346                                         );
 347                                 } else {
 348                                         # Image is small enough to show full size on image page
 349                                         $msgbig = htmlspecialchars( $this->displayImg->getName() );
 350                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 351                                 }
 352
 353                                 $params['width'] = $width;
 354                                 $thumbnail = $this->displayImg->transform( $params );
 355
 356                                 $anchorclose = "<br />";
 357                                 if( $this->displayImg->mustRender() ) {
 358                                         $showLink = true;
 359                                 } else {
 360                                         $anchorclose .=
 361                                                 $msgsmall .
 362                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 363                                 }
 364
 365                                 if( $this->displayImg->isMultipage() ) {
 366                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 367                                 }
 368
 369                                 if( $thumbnail ) {
 370                                         $options = array(
 371                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 372                                                 'file-link' => true,
 373                                         );
 374                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 375                                                 $thumbnail->toHtml( $options ) .
 376                                                 $anchorclose . "</div>\n" );
 377                                 }
 378
 379                                 if( $this->displayImg->isMultipage() ) {
 380                                         $count = $this->displayImg->pageCount();
 381
 382                                         if( $page > 1 ) {
 383                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 384                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 385                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 386                                                         array( 'page' => $page - 1 ) );
 387                                         } else {
 388                                                 $thumb1 = '';
 389                                         }
 390
 391                                         if( $page < $count ) {
 392                                                 $label = wfMsg( 'imgmultipagenext' );
 393                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 394                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 395                                                         array( 'page' => $page + 1 ) );
 396                                         } else {
 397                                                 $thumb2 = '';
 398                                         }
 399
 400                                         global $wgScript;
 401
 402                                         $formParams = array(
 403                                                 'name' => 'pageselector',
 404                                                 'action' => $wgScript,
 405                                                 'onchange' => 'document.pageselector.submit();',
 406                                         );
 407
 408                                         $option = array();
 409                                         for ( $i=1; $i <= $count; $i++ ) {
 410                                                 $options[] = Xml::option( $wgLang->formatNum($i), $i, $i == $page );
 411                                         }
 412                                         $select = Xml::tags( 'select',
 413                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 414                                                 implode( "\n", $options ) );
 415
 416                                         $wgOut->addHTML(
 417                                                 '</td><td><div class="multipageimagenavbox">' .
 418                                                 Xml::openElement( 'form', $formParams ) .
 419                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 420                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 421                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 422                                                 Xml::closeElement( 'form' ) .
 423                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 424                                         );
 425                                 }
 426                         } else {
 427                                 #if direct link is allowed but it's not a renderable image, show an icon.
 428                                 if( $this->displayImg->isSafeFile() ) {
 429                                         $icon= $this->displayImg->iconThumb();
 430
 431                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 432                                         $icon->toHtml( array( 'desc-link' => true ) ) .
 433                                         "</div>\n" );
 434                                 }
 435
 436                                 $showLink = true;
 437                         }
 438
 439
 440                         if($showLink) {
 441                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 442                                 $medialink = $this->displayImg->isMissing() ?
 443                                         "'''$filename'''" :
 444                                         "[[Media:$filename|$filename]]";
 445
 446                                 if( !$this->displayImg->isSafeFile() ) {
 447                                         $warning = wfMsgNoTrans( 'mediawarning' );
 448                                         $wgOut->addWikiText( <<<EOT
 449 <div class="fullMedia">
 450 <span class="dangerousLink">{$medialink}</span>$dirmark
 451 <span class="fileInfo">$longDesc</span>
 452 </div>
 453 <div class="mediaWarning">$warning</div>
 454 EOT
 455                                                 );
 456                                 } else {
 457                                         $wgOut->addWikiText( <<<EOT
 458 <div class="fullMedia">
 459 {$medialink}{$dirmark}
 460 <span class="fileInfo">$longDesc</span>
 461 </div>
 462 EOT
 463                                         );
 464                                 }
 465                         }
 466
 467                         if( !$this->displayImg->isLocal() ) {
 468                                 $this->printSharedImageText();
 469                         }
 470                 } else {
 471                         # Image does not exist
 472                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 473                                 // Only show an upload link if the user can upload
 474                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 475                                 $nofile = wfMsgHtml(
 476                                         'filepage-nofile-link',
 477                                         $uploadTitle->getFullUrl( array( 'wpDestFile' => urlencode( $this->img->getName() ) ) )
 478                                 );
 479                         }
 480                         else
 481                         {
 482                                 $nofile = wfMsgHtml( 'filepage-nofile' );
 483                         }
 484                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 485                         $wgOut->addHTML( '<div id="mw-imagepage-nofile" class="plainlinks">' . $nofile . '</div>' );
 486                 }
 487         }
 488
 489         /**
 490          * Show a notice that the file is from a shared repository
 491          */
 492         protected function printSharedImageText() {
 493                 global $wgOut;
 494
 495                 $this->loadFile();
 496
 497                 $descUrl = $this->img->getDescriptionUrl();
 498                 $descText = $this->img->getDescriptionText();
 499
 500                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 501                 $repo = $this->img->getRepo()->getDisplayName();
 502
 503                 $msg = '';
 504                 if( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 505                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 506                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 507                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 508                 } else {
 509                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 510                 }
 511
 512                 if( $descText ) {
 513                         $this->mExtraDescription = $descText;
 514                 }
 515         }
 516
 517         public function getUploadUrl() {
 518                 $this->loadFile();
 519                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 520                 return $uploadTitle->getFullUrl( array(
 521                         'wpDestFile' => urlencode( $this->img->getName() ),
 522                         'wpForReUpload' => 1
 523                  ) );
 524         }
 525
 526         /**
 527          * Print out the various links at the bottom of the image page, e.g. reupload,
 528          * external editing (and instructions link) etc.
 529          */
 530         protected function uploadLinksBox() {
 531                 global $wgUser, $wgOut, $wgEnableUploads;
 532
 533                 if( !$wgEnableUploads ) { return; }
 534
 535                 $this->loadFile();
 536                 if( !$this->img->isLocal() )
 537                         return;
 538
 539                 $sk = $wgUser->getSkin();
 540
 541                 $wgOut->addHTML( "<br /><ul>\n" );
 542
 543                 # "Upload a new version of this file" link
 544                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 545                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 546                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 547                 }
 548
 549                 # External editing link
 550                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 551                 $wgOut->addHTML( '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . "</small></li>\n" );
 552
 553                 $wgOut->addHTML( "</ul>\n" );
 554         }
 555
 556         protected function closeShowImage() {} # For overloading
 557
 558         /**
 559          * If the page we've just displayed is in the "Image" namespace,
 560          * we follow it with an upload history of the image and its usage.
 561          */
 562         protected function imageHistory() {
 563                 global $wgOut, $wgUseExternalEditor;
 564
 565                 $this->loadFile();
 566                 $pager = new ImageHistoryPseudoPager( $this );
 567                 $wgOut->addHTML( $pager->getBody() );
 568
 569                 $this->img->resetHistory(); // free db resources
 570
 571                 # Exist check because we don't want to show this on pages where an image
 572                 # doesn't exist along with the noimage message, that would suck. -ævar
 573                 if( $wgUseExternalEditor && $this->img->exists() ) {
 574                         $this->uploadLinksBox();
 575                 }
 576         }
 577
 578         protected function imageLinks() {
 579                 global $wgUser, $wgOut, $wgLang;
 580
 581                 $limit = 100;
 582
 583                 $dbr = wfGetDB( DB_SLAVE );
 584
 585                 $res = $dbr->select(
 586                         array( 'imagelinks', 'page' ),
 587                         array( 'page_namespace', 'page_title' ),
 588                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 589                         __METHOD__,
 590                         array( 'LIMIT' => $limit + 1)
 591                 );
 592                 $count = $dbr->numRows( $res );
 593                 if( $count == 0 ) {
 594                         $wgOut->addHTML( "<div id='mw-imagepage-nolinkstoimage'>\n" );
 595                         $wgOut->addWikiMsg( 'nolinkstoimage' );
 596                         $wgOut->addHTML( "</div>\n" );
 597                         return;
 598                 }
 599
 600                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 601                 if( $count <= $limit - 1 ) {
 602                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 603                 } else {
 604                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 605                         $wgOut->addWikiMsg( 'linkstoimage-more',
 606                                 $wgLang->formatNum( $limit ),
 607                                 $this->mTitle->getPrefixedDBkey()
 608                         );
 609                 }
 610
 611                 $wgOut->addHTML( "<ul class='mw-imagepage-linkstoimage'>\n" );
 612                 $sk = $wgUser->getSkin();
 613                 $count = 0;
 614                 while ( $s = $res->fetchObject() ) {
 615                         $count++;
 616                         if( $count <= $limit ) {
 617                                 // We have not yet reached the extra one that tells us there is more to fetch
 618                                 $name = Title::makeTitle( $s->page_namespace, $s->page_title );
 619                                 $link = $sk->makeKnownLinkObj( $name, "" );
 620                                 $wgOut->addHTML( "<li>{$link}</li>\n" );
 621                         }
 622                 }
 623                 $wgOut->addHTML( "</ul>\n" );
 624                 $res->free();
 625
 626                 // Add a links to [[Special:Whatlinkshere]]
 627                 if( $count > $limit )
 628                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 629                 $wgOut->addHTML( "</div>\n" );
 630         }
 631
 632         protected function imageRedirects() {
 633                 global $wgUser, $wgOut, $wgLang;
 634
 635                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 636                 if( count( $redirects ) == 0 ) return;
 637
 638                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 639                 $wgOut->addWikiMsg( 'redirectstofile',
 640                         $wgLang->formatNum( count( $redirects ) )
 641                 );
 642                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 643
 644                 $sk = $wgUser->getSkin();
 645                 foreach ( $redirects as $title ) {
 646                         $link = $sk->makeKnownLinkObj( $title, "", "redirect=no" );
 647                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 648                 }
 649                 $wgOut->addHTML( "</ul></div>\n" );
 650
 651         }
 652
 653         protected function imageDupes() {
 654                 global $wgOut, $wgUser, $wgLang;
 655
 656                 $this->loadFile();
 657
 658                 $dupes = $this->getDuplicates();
 659                 if( count( $dupes ) == 0 ) return;
 660
 661                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 662                 $wgOut->addWikiMsg( 'duplicatesoffile',
 663                         $wgLang->formatNum( count( $dupes ) ), $this->mTitle->getDBkey()
 664                 );
 665                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 666
 667                 $sk = $wgUser->getSkin();
 668                 foreach ( $dupes as $file ) {
 669                         $fromSrc = '';
 670                         if( $file->isLocal() )
 671                                 $link = $sk->makeKnownLinkObj( $file->getTitle(), "" );
 672                         else {
 673                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 674                                         $file->getTitle()->getPrefixedText() );
 675                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 676                         }
 677                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 678                 }
 679                 $wgOut->addHTML( "</ul></div>\n" );
 680         }
 681
 682         /**
 683          * Delete the file, or an earlier version of it
 684          */
 685         public function delete() {
 686                 $this->loadFile();
 687                 if( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 688                         // Standard article deletion
 689                         Article::delete();
 690                         return;
 691                 }
 692                 $deleter = new FileDeleteForm( $this->img );
 693                 $deleter->execute();
 694         }
 695
 696         /**
 697          * Revert the file to an earlier version
 698          */
 699         public function revert() {
 700                 $this->loadFile();
 701                 $reverter = new FileRevertForm( $this->img );
 702                 $reverter->execute();
 703         }
 704
 705         /**
 706          * Override handling of action=purge
 707          */
 708         public function doPurge() {
 709                 $this->loadFile();
 710                 if( $this->img->exists() ) {
 711                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 712                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 713                         $update->doUpdate();
 714                         $this->img->upgradeRow();
 715                         $this->img->purgeCache();
 716                 } else {
 717                         wfDebug( "ImagePage::doPurge no image for " . $this->img->getName() . "; limiting purge to cache only\n" );
 718                         // even if the file supposedly doesn't exist, force any cached information
 719                         // to be updated (in case the cached information is wrong)
 720                         $this->img->purgeCache();
 721                 }
 722                 parent::doPurge();
 723         }
 724
 725         /**
 726          * Display an error with a wikitext description
 727          */
 728         function showError( $description ) {
 729                 global $wgOut;
 730                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 731                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 732                 $wgOut->setArticleRelated( false );
 733                 $wgOut->enableClientCache( false );
 734                 $wgOut->addWikiText( $description );
 735         }
 736
 737 }
 738
 739 /**
 740  * Builds the image revision log shown on image pages
 741  *
 742  * @ingroup Media
 743  */
 744 class ImageHistoryList {
 745
 746         protected $imagePage, $img, $skin, $title, $repo;
 747
 748         public function __construct( $imagePage ) {
 749                 global $wgUser;
 750                 $this->skin = $wgUser->getSkin();
 751                 $this->current = $imagePage->getFile();
 752                 $this->img = $imagePage->getDisplayedFile();
 753                 $this->title = $imagePage->getTitle();
 754                 $this->imagePage = $imagePage;
 755         }
 756
 757         public function getImagePage() {
 758                 return $this->imagePage;
 759         }
 760
 761         public function getSkin() {
 762                 return $this->skin;
 763         }
 764
 765         public function getFile() {
 766                 return $this->img;
 767         }
 768
 769         public function beginImageHistoryList( $navLinks = '' ) {
 770                 global $wgOut, $wgUser;
 771                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 772                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 773                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 774                         . $navLinks . "\n"
 775                         . Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
 776                         . '<tr><td></td>'
 777                         . ( $this->current->isLocal() && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ? '<td></td>' : '' )
 778                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 779                         . '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>'
 780                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 781                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 782                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 783                         . "</tr>\n";
 784         }
 785
 786         public function endImageHistoryList( $navLinks = '' ) {
 787                 return "</table>\n$navLinks\n</div>\n";
 788         }
 789
 790         public function imageHistoryLine( $iscur, $file ) {
 791                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 792
 793                 $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 794                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 795                 $user = $file->getUser('id');
 796                 $usertext = $file->getUser('text');
 797                 $description = $file->getDescription();
 798                 $sha1 = $file->getSha1();
 799
 800                 $local = $this->current->isLocal();
 801                 $row = $css = $selected = '';
 802
 803                 // Deletion link
 804                 if( $local && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ) {
 805                         $row .= '<td>';
 806                         # Link to remove from history
 807                         if( $wgUser->isAllowed( 'delete' ) ) {
 808                                 $q = array( 'action' => 'delete' );
 809                                 if( !$iscur )
 810                                         $q['oldimage'] = $img;
 811                                 $row .= $this->skin->link(
 812                                         $this->title,
 813                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 814                                         array(), $q, array( 'known' )
 815                                 );
 816                         }
 817                         # Link to hide content
 818                         if( $wgUser->isAllowed( 'deleterevision' ) ) {
 819                                 if( $wgUser->isAllowed('delete') ) {
 820                                         $row .= '<br/>';
 821                                 }
 822                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 823                                 // If file is top revision or locked from this user, don't link
 824                                 if( $iscur || !$file->userCan(File::DELETED_RESTRICTED) ) {
 825                                         $del = wfMsgHtml( 'rev-delundel' );
 826                                 } else {
 827                                         // If the file was hidden, link to sha-1
 828                                         list( $ts, $name ) = explode( '!', $img, 2 );
 829                                         $del = $this->skin->link( $revdel, wfMsgHtml( 'rev-delundel' ),
 830                                                 array(),
 831                                                 array( 'target' => $wgTitle->getPrefixedText(), 'oldimage' => $ts ),
 832                                                 array( 'known' )
 833                                         );
 834                                         // Bolden oversighted content
 835                                         if( $file->isDeleted(File::DELETED_RESTRICTED) )
 836                                                 $del = "<strong>$del</strong>";
 837                                 }
 838                                 $row .= "<tt style='white-space: nowrap;'><small>$del</small></tt>";
 839                         }
 840                         $row .= '</td>';
 841                 }
 842
 843                 // Reversion link/current indicator
 844                 $row .= '<td>';
 845                 if( $iscur ) {
 846                         $row .= wfMsgHtml( 'filehist-current' );
 847                 } elseif( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 848                         if( $file->isDeleted(File::DELETED_FILE) ) {
 849                                 $row .= wfMsgHtml('filehist-revert');
 850                         } else {
 851                                 $q = array();
 852                                 $q[] = 'action=revert';
 853                                 $q[] = 'oldimage=' . urlencode( $img );
 854                                 $q[] = 'wpEditToken=' . urlencode( $wgUser->editToken( $img ) );
 855                                 $row .= $this->skin->makeKnownLinkObj( $this->title,
 856                                         wfMsgHtml( 'filehist-revert' ),
 857                                         implode( '&', $q ) );
 858                         }
 859                 }
 860                 $row .= '</td>';
 861
 862                 // Date/time and image link
 863                 if( $file->getTimestamp() === $this->img->getTimestamp() ) {
 864                         $selected = "class='filehistory-selected'";
 865                 }
 866                 $row .= "<td $selected style='white-space: nowrap;'>";
 867                 if( !$file->userCan(File::DELETED_FILE) ) {
 868                         # Don't link to unviewable files
 869                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 870                 } elseif( $file->isDeleted(File::DELETED_FILE) ) {
 871                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 872                         # Make a link to review the image
 873                         $url = $this->skin->makeKnownLinkObj( $revdel, $wgLang->timeAndDate( $timestamp, true ),
 874                                 "target=".$wgTitle->getPrefixedText()."&file=$sha1.".$this->current->getExtension() );
 875                         $row .= '<span class="history-deleted">'.$url.'</span>';
 876                 } elseif( $file->isMissing() ) {
 877                         # Don't link to missing files
 878                         $row .= $wgLang->timeAndDate( $timestamp, true );
 879                 } else {
 880                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 881                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 882                 }
 883                 $row .= "</td>";
 884
 885                 // Thumbnail
 886                 $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
 887
 888                 // Image dimensions + size
 889                 $row .= '<td>';
 890                 $row .= htmlspecialchars( $file->getDimensionsString() );
 891                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $file->getSize() ) . ')</span>';
 892                 $row .= '</td>';
 893
 894                 // Uploading user
 895                 $row .= '<td>';
 896                 if( $local ) {
 897                         // Hide deleted usernames
 898                         if( $file->isDeleted(File::DELETED_USER) ) {
 899                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 900                         } else {
 901                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 902                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 903                         }
 904                 } else {
 905                         $row .= htmlspecialchars( $usertext );
 906                 }
 907                 $row .= '</td><td>';
 908
 909                 // Don't show deleted descriptions
 910                 if( $file->isDeleted(File::DELETED_COMMENT) ) {
 911                         $row .= '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 912                 } else {
 913                         $row .= $this->skin->commentBlock( $description, $this->title );
 914                 }
 915                 $row .= '</td>';
 916
 917                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
 918                 $classAttr = $rowClass ? " class='$rowClass'" : "";
 919
 920                 return "<tr{$classAttr}>{$row}</tr>\n";
 921         }
 922
 923         protected function getThumbForLine( $file ) {
 924                 global $wgLang;
 925
 926                 if( $file->isMissing() ) {
 927                         return '<strong class="error">' . wfMsgHtml( 'filehist-missing' ) . '</strong>';
 928                 } elseif( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
 929                         $params = array(
 930                                 'width' => '120',
 931                                 'height' => '120',
 932                         );
 933                         $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 934
 935                         $thumbnail = $file->transform( $params );
 936                         $options = array(
 937                                 'alt' => wfMsg( 'filehist-thumbtext', $wgLang->timeAndDate( $timestamp, true ) ),
 938                                 'file-link' => true,
 939                         );
 940
 941                         if ( !$thumbnail ) return wfMsgHtml( 'filehist-nothumb' );
 942
 943                         return $thumbnail->toHtml( $options );
 944                 } else {
 945                         return wfMsgHtml( 'filehist-nothumb' );
 946                 }
 947         }
 948 }
 949
 950 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
 951         function __construct( $imagePage ) {
 952                 parent::__construct();
 953                 $this->mImagePage = $imagePage;
 954                 $this->mTitle = clone( $imagePage->getTitle() );
 955                 $this->mTitle->setFragment( '#filehistory' );
 956                 $this->mImg = NULL;
 957                 $this->mHist = array();
 958                 $this->mRange = array( 0, 0 ); // display range
 959         }
 960
 961         function getTitle() {
 962                 return $this->mTitle;
 963         }
 964
 965         function getQueryInfo() {
 966                 return false;
 967         }
 968
 969         function getIndexField() {
 970                 return '';
 971         }
 972
 973         function formatRow( $row ) {
 974                 return '';
 975         }
 976
 977         function getBody() {
 978                 $s = '';
 979                 $this->doQuery();
 980                 if( count($this->mHist) ) {
 981                         $list = new ImageHistoryList( $this->mImagePage );
 982                         # Generate prev/next links
 983                         $navLink = $this->getNavigationBar();
 984                         $s = $list->beginImageHistoryList($navLink);
 985                         // Skip rows there just for paging links
 986                         for( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
 987                                 $file = $this->mHist[$i];
 988                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
 989                         }
 990                         $s .= $list->endImageHistoryList($navLink);
 991                 }
 992                 return $s;
 993         }
 994
 995         function doQuery() {
 996                 if( $this->mQueryDone ) return;
 997                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
 998                 if( !$this->mImg->exists() ) {
 999                         return;
1000                 }
1001                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1002                 if( $this->mIsBackwards ) {
1003                         // Fetch the file history
1004                         $this->mHist = $this->mImg->getHistory($queryLimit,null,$this->mOffset,false);
1005                         // The current rev may not meet the offset/limit
1006                         $numRows = count($this->mHist);
1007                         if( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1008                                 $this->mHist = array_merge( array($this->mImg), $this->mHist );
1009                         }
1010                 } else {
1011                         // The current rev may not meet the offset
1012                         if( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1013                                 $this->mHist[] = $this->mImg;
1014                         }
1015                         // Old image versions (fetch extra row for nav links)
1016                         $oiLimit = count($this->mHist) ? $this->mLimit : $this->mLimit+1;
1017                         // Fetch the file history
1018                         $this->mHist = array_merge( $this->mHist,
1019                                 $this->mImg->getHistory($oiLimit,$this->mOffset,null,false) );
1020                 }
1021                 $numRows = count($this->mHist); // Total number of query results
1022                 if( $numRows ) {
1023                         # Index value of top item in the list
1024                         $firstIndex = $this->mIsBackwards ?
1025                                 $this->mHist[$numRows-1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1026                         # Discard the extra result row if there is one
1027                         if( $numRows > $this->mLimit && $numRows > 1 ) {
1028                                 if( $this->mIsBackwards ) {
1029                                         # Index value of item past the index
1030                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1031                                         # Index value of bottom item in the list
1032                                         $lastIndex = $this->mHist[1]->getTimestamp();
1033                                         # Display range
1034                                         $this->mRange = array( 1, $numRows-1 );
1035                                 } else {
1036                                         # Index value of item past the index
1037                                         $this->mPastTheEndIndex = $this->mHist[$numRows-1]->getTimestamp();
1038                                         # Index value of bottom item in the list
1039                                         $lastIndex = $this->mHist[$numRows-2]->getTimestamp();
1040                                         # Display range
1041                                         $this->mRange = array( 0, $numRows-2 );
1042                                 }
1043                         } else {
1044                                 # Setting indexes to an empty string means that they will be
1045                                 # omitted if they would otherwise appear in URLs. It just so
1046                                 # happens that this  is the right thing to do in the standard
1047                                 # UI, in all the relevant cases.
1048                                 $this->mPastTheEndIndex = '';
1049                                 # Index value of bottom item in the list
1050                                 $lastIndex = $this->mIsBackwards ?
1051                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows-1]->getTimestamp();
1052                                 # Display range
1053                                 $this->mRange = array( 0, $numRows-1 );
1054                         }
1055                 } else {
1056                         $firstIndex = '';
1057                         $lastIndex = '';
1058                         $this->mPastTheEndIndex = '';
1059                 }
1060                 if( $this->mIsBackwards ) {
1061                         $this->mIsFirst = ( $numRows < $queryLimit );
1062                         $this->mIsLast = ( $this->mOffset == '' );
1063                         $this->mLastShown = $firstIndex;
1064                         $this->mFirstShown = $lastIndex;
1065                 } else {
1066                         $this->mIsFirst = ( $this->mOffset == '' );
1067                         $this->mIsLast = ( $numRows < $queryLimit );
1068                         $this->mLastShown = $lastIndex;
1069                         $this->mFirstShown = $firstIndex;
1070                 }
1071                 $this->mQueryDone = true;
1072         }
1073 }