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
  65                 $diff = $wgRequest->getVal( 'diff' );
  66                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  67
  68                 if ( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  69                         return Article::view();
  70                 }
  71
  72                 $this->loadFile();
  73
  74                 if ( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  75                         if ( $this->mTitle->getDBkey() == $this->img->getName() || isset( $diff ) ) {
  76                                 // mTitle is the same as the redirect target so ask Article
  77                                 // to perform the redirect for us.
  78                                 $wgRequest->setVal( 'diffonly', 'true' );
  79                                 return Article::view();
  80                         } else {
  81                                 // mTitle is not the same as the redirect target so it is
  82                                 // probably the redirect page itself. Fake the redirect symbol
  83                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  84                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  85                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  86                                 $this->viewUpdates();
  87                                 return;
  88                         }
  89                 }
  90
  91                 $this->showRedirectedFromHeader();
  92
  93                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
  94                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  95                         $formattedMetadata = $this->displayImg->formatMetadata();
  96                         $showmeta = $formattedMetadata !== false;
  97                 } else {
  98                         $showmeta = false;
  99                 }
 100
 101                 if ( !$diff && $this->displayImg->exists() )
 102                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 103
 104                 if ( !$diff )
 105                         $this->openShowImage();
 106
 107                 # No need to display noarticletext, we use our own message, output in openShowImage()
 108                 if ( $this->getID() ) {
 109                         Article::view();
 110                 } else {
 111                         # Just need to set the right headers
 112                         $wgOut->setArticleFlag( true );
 113                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 114                         $this->viewUpdates();
 115                 }
 116
 117                 # Show shared description, if needed
 118                 if ( $this->mExtraDescription ) {
 119                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
 120                         if ( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
 121                                 $wgOut->addWikiText( $fol );
 122                         }
 123                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 124                 }
 125
 126                 $this->closeShowImage();
 127                 $this->imageHistory();
 128                 // TODO: Cleanup the following
 129
 130                 $wgOut->addHTML( Xml::element( 'h2',
 131                         array( 'id' => 'filelinks' ),
 132                         wfMsg( 'imagelinks' ) ) . "\n" );
 133                 $this->imageDupes();
 134                 # TODO! FIXME! For some freaky reason, we can't redirect to foreign images.
 135                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 136                 $this->imageRedirects();
 137                 $this->imageLinks();
 138
 139                 # Allow extensions to add something after the image links
 140                 $html = '';
 141                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 142                 if ( $html )
 143                         $wgOut->addHTML( $html );
 144
 145                 if ( $showmeta ) {
 146                         global $wgStylePath, $wgStyleVersion;
 147                         $expand = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-expand' ) ) );
 148                         $collapse = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-collapse' ) ) );
 149                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 150                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 151                         $wgOut->addScriptFile( 'metadata.js' );
 152                         $wgOut->addHTML(
 153                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 154                 }
 155         }
 156
 157         public function getRedirectTarget() {
 158                 $this->loadFile();
 159                 if ( $this->img->isLocal() ) {
 160                         return parent::getRedirectTarget();
 161                 }
 162                 // Foreign image page
 163                 $from = $this->img->getRedirected();
 164                 $to = $this->img->getName();
 165                 if ( $from == $to ) {
 166                         return null;
 167                 }
 168                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 169         }
 170         public function followRedirect() {
 171                 $this->loadFile();
 172                 if ( $this->img->isLocal() ) {
 173                         return parent::followRedirect();
 174                 }
 175                 $from = $this->img->getRedirected();
 176                 $to = $this->img->getName();
 177                 if ( $from == $to ) {
 178                         return false;
 179                 }
 180                 return Title::makeTitle( NS_FILE, $to );
 181         }
 182         public function isRedirect( $text = false ) {
 183                 $this->loadFile();
 184                 if ( $this->img->isLocal() )
 185                         return parent::isRedirect( $text );
 186
 187                 return (bool)$this->img->getRedirected();
 188         }
 189
 190         public function isLocal() {
 191                 $this->loadFile();
 192                 return $this->img->isLocal();
 193         }
 194
 195         public function getFile() {
 196                 $this->loadFile();
 197                 return $this->img;
 198         }
 199
 200         public function getDisplayedFile() {
 201                 $this->loadFile();
 202                 return $this->displayImg;
 203         }
 204
 205         public function getDuplicates() {
 206                 $this->loadFile();
 207                 if ( !is_null( $this->dupes ) ) {
 208                         return $this->dupes;
 209                 }
 210                 if ( !( $hash = $this->img->getSha1() ) ) {
 211                         return $this->dupes = array();
 212                 }
 213                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 214                 // Remove duplicates with self and non matching file sizes
 215                 $self = $this->img->getRepoName() . ':' . $this->img->getName();
 216                 $size = $this->img->getSize();
 217                 foreach ( $dupes as $index => $file ) {
 218                         $key = $file->getRepoName() . ':' . $file->getName();
 219                         if ( $key == $self )
 220                                 unset( $dupes[$index] );
 221                         if ( $file->getSize() != $size )
 222                                 unset( $dupes[$index] );
 223                 }
 224                 return $this->dupes = $dupes;
 225
 226         }
 227
 228
 229         /**
 230          * Create the TOC
 231          *
 232          * @param bool $metadata Whether or not to show the metadata link
 233          * @return string
 234          */
 235         protected function showTOC( $metadata ) {
 236                 $r = array(
 237                                 '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 238                                 '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 239                                 '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 240                 );
 241                 if ( $metadata ) {
 242                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 243                 }
 244
 245                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 246
 247                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 248         }
 249
 250         /**
 251          * Make a table with metadata to be shown in the output page.
 252          *
 253          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 254          *
 255          * @param array $exif The array containing the EXIF data
 256          * @return string
 257          */
 258         protected function makeMetadataTable( $metadata ) {
 259                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 260                 $r .= wfMsgNoTrans( 'metadata-help' );
 261                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 262                 foreach ( $metadata as $type => $stuff ) {
 263                         foreach ( $stuff as $v ) {
 264                                 # FIXME, why is this using escapeId for a class?!
 265                                 $class = Sanitizer::escapeId( $v['id'] );
 266                                 if ( $type == 'collapsed' ) {
 267                                         $class .= ' collapsable';
 268                                 }
 269                                 $r .= "<tr class=\"$class\">\n";
 270                                 $r .= "<th>{$v['name']}</th>\n";
 271                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 272                         }
 273                 }
 274                 $r .= "</table>\n</div>\n";
 275                 return $r;
 276         }
 277
 278         /**
 279          * Overloading Article's getContent method.
 280          *
 281          * Omit noarticletext if sharedupload; text will be fetched from the
 282          * shared upload server if possible.
 283          */
 284         public function getContent() {
 285                 $this->loadFile();
 286                 if ( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 287                         return '';
 288                 }
 289                 return Article::getContent();
 290         }
 291
 292         protected function openShowImage() {
 293                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 294                         $wgLang, $wgContLang, $wgEnableUploads;
 295
 296                 $this->loadFile();
 297
 298                 $full_url  = $this->displayImg->getURL();
 299                 $linkAttribs = false;
 300                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 301                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 302                         $sizeSel = User::getDefaultOption( 'imagesize' );
 303
 304                         // The user offset might still be incorrect, specially if
 305                         // $wgImageLimits got changed (see bug #8858).
 306                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 307                                 // Default to the first offset in $wgImageLimits
 308                                 $sizeSel = 0;
 309                         }
 310                 }
 311                 $max = $wgImageLimits[$sizeSel];
 312                 $maxWidth = $max[0];
 313                 $maxHeight = $max[1];
 314                 $sk = $wgUser->getSkin();
 315                 $dirmark = $wgContLang->getDirMark();
 316
 317                 if ( $this->displayImg->exists() ) {
 318                         # image
 319                         $page = $wgRequest->getIntOrNull( 'page' );
 320                         if ( is_null( $page ) ) {
 321                                 $params = array();
 322                                 $page = 1;
 323                         } else {
 324                                 $params = array( 'page' => $page );
 325                         }
 326                         $width_orig = $this->displayImg->getWidth();
 327                         $width = $width_orig;
 328                         $height_orig = $this->displayImg->getHeight();
 329                         $height = $height_orig;
 330                         $mime = $this->displayImg->getMimeType();
 331                         $showLink = false;
 332                         $linkAttribs = array( 'href' => $full_url );
 333                         $longDesc = $this->displayImg->getLongDesc();
 334
 335                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 336
 337                         if ( $this->displayImg->allowInlineDisplay() ) {
 338                                 # image
 339
 340                                 # "Download high res version" link below the image
 341                                 # $msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 342                                 # We'll show a thumbnail of this image
 343                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 344                                         # Calculate the thumbnail size.
 345                                         # First case, the limiting factor is the width, not the height.
 346                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 347                                                 $height = round( $height * $maxWidth / $width );
 348                                                 $width = $maxWidth;
 349                                                 # Note that $height <= $maxHeight now.
 350                                         } else {
 351                                                 $newwidth = floor( $width * $maxHeight / $height );
 352                                                 $height = round( $height * $newwidth / $width );
 353                                                 $width = $newwidth;
 354                                                 # Note that $height <= $maxHeight now, but might not be identical
 355                                                 # because of rounding.
 356                                         }
 357                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 358                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 359                                                 $wgLang->formatNum( $width ),
 360                                                 $wgLang->formatNum( $height )
 361                                         );
 362                                 } else {
 363                                         # Image is small enough to show full size on image page
 364                                         $msgbig = htmlspecialchars( $this->displayImg->getName() );
 365                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 366                                 }
 367
 368                                 $params['width'] = $width;
 369                                 $thumbnail = $this->displayImg->transform( $params );
 370
 371                                 $anchorclose = "<br />";
 372                                 if ( $this->displayImg->mustRender() ) {
 373                                         $showLink = true;
 374                                 } else {
 375                                         $anchorclose .=
 376                                                 $msgsmall .
 377                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 378                                 }
 379
 380                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 381                                 if ( $isMulti ) {
 382                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 383                                 }
 384
 385                                 if ( $thumbnail ) {
 386                                         $options = array(
 387                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 388                                                 'file-link' => true,
 389                                         );
 390                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 391                                                 $thumbnail->toHtml( $options ) .
 392                                                 $anchorclose . "</div>\n" );
 393                                 }
 394
 395                                 if ( $isMulti ) {
 396                                         $count = $this->displayImg->pageCount();
 397
 398                                         if ( $page > 1 ) {
 399                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 400                                                 $link = $sk->link(
 401                                                         $this->mTitle,
 402                                                         $label,
 403                                                         array(),
 404                                                         array( 'page' => $page - 1 ),
 405                                                         array( 'known', 'noclasses' )
 406                                                 );
 407                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 408                                                         array( 'page' => $page - 1 ) );
 409                                         } else {
 410                                                 $thumb1 = '';
 411                                         }
 412
 413                                         if ( $page < $count ) {
 414                                                 $label = wfMsg( 'imgmultipagenext' );
 415                                                 $link = $sk->link(
 416                                                         $this->mTitle,
 417                                                         $label,
 418                                                         array(),
 419                                                         array( 'page' => $page + 1 ),
 420                                                         array( 'known', 'noclasses' )
 421                                                 );
 422                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 423                                                         array( 'page' => $page + 1 ) );
 424                                         } else {
 425                                                 $thumb2 = '';
 426                                         }
 427
 428                                         global $wgScript;
 429
 430                                         $formParams = array(
 431                                                 'name' => 'pageselector',
 432                                                 'action' => $wgScript,
 433                                                 'onchange' => 'document.pageselector.submit();',
 434                                         );
 435
 436                                         $option = array();
 437                                         for ( $i = 1; $i <= $count; $i++ ) {
 438                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 439                                         }
 440                                         $select = Xml::tags( 'select',
 441                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 442                                                 implode( "\n", $options ) );
 443
 444                                         $wgOut->addHTML(
 445                                                 '</td><td><div class="multipageimagenavbox">' .
 446                                                 Xml::openElement( 'form', $formParams ) .
 447                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 448                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 449                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 450                                                 Xml::closeElement( 'form' ) .
 451                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 452                                         );
 453                                 }
 454                         } else {
 455                                 # if direct link is allowed but it's not a renderable image, show an icon.
 456                                 if ( $this->displayImg->isSafeFile() ) {
 457                                         $icon = $this->displayImg->iconThumb();
 458
 459                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 460                                         $icon->toHtml( array( 'file-link' => true ) ) .
 461                                         "</div>\n" );
 462                                 }
 463
 464                                 $showLink = true;
 465                         }
 466
 467
 468                         if ( $showLink ) {
 469                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 470                                 $medialink = "[[Media:$filename|$filename]]";
 471
 472                                 if ( !$this->displayImg->isSafeFile() ) {
 473                                         $warning = wfMsgNoTrans( 'mediawarning' );
 474                                         $wgOut->addWikiText( <<<EOT
 475 <div class="fullMedia">
 476 <span class="dangerousLink">{$medialink}</span>$dirmark
 477 <span class="fileInfo">$longDesc</span>
 478 </div>
 479 <div class="mediaWarning">$warning</div>
 480 EOT
 481                                                 );
 482                                 } else {
 483                                         $wgOut->addWikiText( <<<EOT
 484 <div class="fullMedia">
 485 {$medialink}{$dirmark}
 486 <span class="fileInfo">$longDesc</span>
 487 </div>
 488 EOT
 489                                         );
 490                                 }
 491                         }
 492
 493                         if ( !$this->displayImg->isLocal() ) {
 494                                 $this->printSharedImageText();
 495                         }
 496                 } else {
 497                         # Image does not exist
 498                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 499                                 // Only show an upload link if the user can upload
 500                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 501                                 $nofile = array(
 502                                         'filepage-nofile-link',
 503                                         $uploadTitle->getFullUrl( array( 'wpDestFile' => $this->img->getName() ) )
 504                                 );
 505                         }
 506                         else
 507                         {
 508                                 $nofile = 'filepage-nofile';
 509                         }
 510                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 511                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 512                 }
 513         }
 514
 515         /**
 516          * Show a notice that the file is from a shared repository
 517          */
 518         protected function printSharedImageText() {
 519                 global $wgOut;
 520
 521                 $this->loadFile();
 522
 523                 $descUrl = $this->img->getDescriptionUrl();
 524                 $descText = $this->img->getDescriptionText();
 525
 526                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 527                 $repo = $this->img->getRepo()->getDisplayName();
 528
 529                 $msg = '';
 530                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 531                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 532                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 533                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 534                 } else {
 535                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 536                 }
 537
 538                 if ( $descText ) {
 539                         $this->mExtraDescription = $descText;
 540                 }
 541         }
 542
 543         public function getUploadUrl() {
 544                 $this->loadFile();
 545                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 546                 return $uploadTitle->getFullUrl( array(
 547                         'wpDestFile' => $this->img->getName(),
 548                         'wpForReUpload' => 1
 549                  ) );
 550         }
 551
 552         /**
 553          * Print out the various links at the bottom of the image page, e.g. reupload,
 554          * external editing (and instructions link) etc.
 555          */
 556         protected function uploadLinksBox() {
 557                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 558
 559                 if ( !$wgEnableUploads ) { return; }
 560
 561                 $this->loadFile();
 562                 if ( !$this->img->isLocal() )
 563                         return;
 564
 565                 $sk = $wgUser->getSkin();
 566
 567                 $wgOut->addHTML( "<br /><ul>\n" );
 568
 569                 # "Upload a new version of this file" link
 570                 if ( UploadBase::userCanReUpload( $wgUser, $this->img->name ) ) {
 571                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 572                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 573                 }
 574
 575                 # External editing link
 576                 if ( $wgUseExternalEditor ) {
 577                         $elink = $sk->link(
 578                                 $this->mTitle,
 579                                 wfMsgHtml( 'edit-externally' ),
 580                                 array(),
 581                                 array(
 582                                         'action' => 'edit',
 583                                         'externaledit' => 'true',
 584                                         'mode' => 'file'
 585                                 ),
 586                                 array( 'known', 'noclasses' )
 587                         );
 588                         $wgOut->addHTML( '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . "</small></li>\n" );
 589                 }
 590
 591                 $wgOut->addHTML( "</ul>\n" );
 592         }
 593
 594         protected function closeShowImage() { } # For overloading
 595
 596         /**
 597          * If the page we've just displayed is in the "Image" namespace,
 598          * we follow it with an upload history of the image and its usage.
 599          */
 600         protected function imageHistory() {
 601                 global $wgOut;
 602
 603                 $this->loadFile();
 604                 $pager = new ImageHistoryPseudoPager( $this );
 605                 $wgOut->addHTML( $pager->getBody() );
 606
 607                 $this->img->resetHistory(); // free db resources
 608
 609                 # Exist check because we don't want to show this on pages where an image
 610                 # doesn't exist along with the noimage message, that would suck. -ævar
 611                 if ( $this->img->exists() ) {
 612                         $this->uploadLinksBox();
 613                 }
 614         }
 615
 616         protected function imageLinks() {
 617                 global $wgUser, $wgOut, $wgLang;
 618
 619                 $limit = 100;
 620
 621                 $dbr = wfGetDB( DB_SLAVE );
 622
 623                 $res = $dbr->select(
 624                         array( 'imagelinks', 'page' ),
 625                         array( 'page_namespace', 'page_title' ),
 626                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 627                         __METHOD__,
 628                         array( 'LIMIT' => $limit + 1 )
 629                 );
 630                 $count = $dbr->numRows( $res );
 631                 if ( $count == 0 ) {
 632                         $wgOut->addHTML( "<div id='mw-imagepage-nolinkstoimage'>\n" );
 633                         $wgOut->addWikiMsg( 'nolinkstoimage' );
 634                         $wgOut->addHTML( "</div>\n" );
 635                         return;
 636                 }
 637
 638                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 639                 if ( $count <= $limit - 1 ) {
 640                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 641                 } else {
 642                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 643                         $wgOut->addWikiMsg( 'linkstoimage-more',
 644                                 $wgLang->formatNum( $limit ),
 645                                 $this->mTitle->getPrefixedDBkey()
 646                         );
 647                 }
 648
 649                 $wgOut->addHTML( "<ul class='mw-imagepage-linkstoimage'>\n" );
 650                 $sk = $wgUser->getSkin();
 651                 $count = 0;
 652                 while ( $s = $res->fetchObject() ) {
 653                         $count++;
 654                         if ( $count <= $limit ) {
 655                                 // We have not yet reached the extra one that tells us there is more to fetch
 656                                 $link = $sk->link(
 657                                         Title::makeTitle( $s->page_namespace, $s->page_title ),
 658                                         null,
 659                                         array(),
 660                                         array(),
 661                                         array( 'known', 'noclasses' )
 662                                 );
 663                                 $wgOut->addHTML( "<li>{$link}</li>\n" );
 664                         }
 665                 }
 666                 $wgOut->addHTML( "</ul>\n" );
 667                 $res->free();
 668
 669                 // Add a links to [[Special:Whatlinkshere]]
 670                 if ( $count > $limit )
 671                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 672                 $wgOut->addHTML( "</div>\n" );
 673         }
 674
 675         protected function imageRedirects() {
 676                 global $wgUser, $wgOut, $wgLang;
 677
 678                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 679                 if ( count( $redirects ) == 0 ) return;
 680
 681                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 682                 $wgOut->addWikiMsg( 'redirectstofile',
 683                         $wgLang->formatNum( count( $redirects ) )
 684                 );
 685                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 686
 687                 $sk = $wgUser->getSkin();
 688                 foreach ( $redirects as $title ) {
 689                         $link = $sk->link(
 690                                 $title,
 691                                 null,
 692                                 array(),
 693                                 array( 'redirect' => 'no' ),
 694                                 array( 'known', 'noclasses' )
 695                         );
 696                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 697                 }
 698                 $wgOut->addHTML( "</ul></div>\n" );
 699
 700         }
 701
 702         protected function imageDupes() {
 703                 global $wgOut, $wgUser, $wgLang;
 704
 705                 $this->loadFile();
 706
 707                 $dupes = $this->getDuplicates();
 708                 if ( count( $dupes ) == 0 ) return;
 709
 710                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 711                 $wgOut->addWikiMsg( 'duplicatesoffile',
 712                         $wgLang->formatNum( count( $dupes ) ), $this->mTitle->getDBkey()
 713                 );
 714                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 715
 716                 $sk = $wgUser->getSkin();
 717                 foreach ( $dupes as $file ) {
 718                         $fromSrc = '';
 719                         if ( $file->isLocal() ) {
 720                                 $link = $sk->link(
 721                                         $file->getTitle(),
 722                                         null,
 723                                         array(),
 724                                         array(),
 725                                         array( 'known', 'noclasses' )
 726                                 );
 727                         } else {
 728                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 729                                         $file->getTitle()->getPrefixedText() );
 730                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 731                         }
 732                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 733                 }
 734                 $wgOut->addHTML( "</ul></div>\n" );
 735         }
 736
 737         /**
 738          * Delete the file, or an earlier version of it
 739          */
 740         public function delete() {
 741                 global $wgUploadMaintenance;
 742                 if ( $wgUploadMaintenance && $this->mTitle && $this->mTitle->getNamespace() == NS_FILE ) {
 743                         global $wgOut;
 744                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 745                         return;
 746                 }
 747
 748                 $this->loadFile();
 749                 if ( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 750                         // Standard article deletion
 751                         Article::delete();
 752                         return;
 753                 }
 754                 $deleter = new FileDeleteForm( $this->img );
 755                 $deleter->execute();
 756         }
 757
 758         /**
 759          * Revert the file to an earlier version
 760          */
 761         public function revert() {
 762                 $this->loadFile();
 763                 $reverter = new FileRevertForm( $this->img );
 764                 $reverter->execute();
 765         }
 766
 767         /**
 768          * Override handling of action=purge
 769          */
 770         public function doPurge() {
 771                 $this->loadFile();
 772                 if ( $this->img->exists() ) {
 773                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 774                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 775                         $update->doUpdate();
 776                         $this->img->upgradeRow();
 777                         $this->img->purgeCache();
 778                 } else {
 779                         wfDebug( "ImagePage::doPurge no image for " . $this->img->getName() . "; limiting purge to cache only\n" );
 780                         // even if the file supposedly doesn't exist, force any cached information
 781                         // to be updated (in case the cached information is wrong)
 782                         $this->img->purgeCache();
 783                 }
 784                 parent::doPurge();
 785         }
 786
 787         /**
 788          * Display an error with a wikitext description
 789          */
 790         function showError( $description ) {
 791                 global $wgOut;
 792                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 793                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 794                 $wgOut->setArticleRelated( false );
 795                 $wgOut->enableClientCache( false );
 796                 $wgOut->addWikiText( $description );
 797         }
 798
 799 }
 800
 801 /**
 802  * Builds the image revision log shown on image pages
 803  *
 804  * @ingroup Media
 805  */
 806 class ImageHistoryList {
 807
 808         protected $imagePage, $img, $skin, $title, $repo, $showThumb;
 809
 810         public function __construct( $imagePage ) {
 811                 global $wgUser, $wgShowArchiveThumbnails;
 812                 $this->skin = $wgUser->getSkin();
 813                 $this->current = $imagePage->getFile();
 814                 $this->img = $imagePage->getDisplayedFile();
 815                 $this->title = $imagePage->getTitle();
 816                 $this->imagePage = $imagePage;
 817                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 818         }
 819
 820         public function getImagePage() {
 821                 return $this->imagePage;
 822         }
 823
 824         public function getSkin() {
 825                 return $this->skin;
 826         }
 827
 828         public function getFile() {
 829                 return $this->img;
 830         }
 831
 832         public function beginImageHistoryList( $navLinks = '' ) {
 833                 global $wgOut, $wgUser;
 834                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 835                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 836                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 837                         . $navLinks . "\n"
 838                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 839                         . '<tr><td></td>'
 840                         . ( $this->current->isLocal() && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ? '<td></td>' : '' )
 841                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 842                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 843                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 844                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 845                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 846                         . "</tr>\n";
 847         }
 848
 849         public function endImageHistoryList( $navLinks = '' ) {
 850                 return "</table>\n$navLinks\n</div>\n";
 851         }
 852
 853         public function imageHistoryLine( $iscur, $file ) {
 854                 global $wgUser, $wgLang, $wgContLang;
 855
 856                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 857                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 858                 $user = $file->getUser( 'id' );
 859                 $usertext = $file->getUser( 'text' );
 860                 $description = $file->getDescription();
 861
 862                 $local = $this->current->isLocal();
 863                 $row = $css = $selected = '';
 864
 865                 // Deletion link
 866                 if ( $local && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ) {
 867                         $row .= '<td>';
 868                         # Link to remove from history
 869                         if ( $wgUser->isAllowed( 'delete' ) ) {
 870                                 $q = array( 'action' => 'delete' );
 871                                 if ( !$iscur )
 872                                         $q['oldimage'] = $img;
 873                                 $row .= $this->skin->link(
 874                                         $this->title,
 875                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 876                                         array(), $q, array( 'known' )
 877                                 );
 878                         }
 879                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 880                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 881                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 882                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 883                                         $row .= '<br />';
 884                                 }
 885                                 // If file is top revision or locked from this user, don't link
 886                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 887                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 888                                 } else {
 889                                         list( $ts, $name ) = explode( '!', $img, 2 );
 890                                         $query = array(
 891                                                 'type'   => 'oldimage',
 892                                                 'target' => $this->title->getPrefixedText(),
 893                                                 'ids'    => $ts,
 894                                         );
 895                                         $del = $this->skin->revDeleteLink( $query,
 896                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 897                                 }
 898                                 $row .= $del;
 899                         }
 900                         $row .= '</td>';
 901                 }
 902
 903                 // Reversion link/current indicator
 904                 $row .= '<td>';
 905                 if ( $iscur ) {
 906                         $row .= wfMsgHtml( 'filehist-current' );
 907                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 908                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 909                                 $row .= wfMsgHtml( 'filehist-revert' );
 910                         } else {
 911                                 $row .= $this->skin->link(
 912                                         $this->title,
 913                                         wfMsgHtml( 'filehist-revert' ),
 914                                         array(),
 915                                         array(
 916                                                 'action' => 'revert',
 917                                                 'oldimage' => $img,
 918                                                 'wpEditToken' => $wgUser->editToken( $img )
 919                                         ),
 920                                         array( 'known', 'noclasses' )
 921                                 );
 922                         }
 923                 }
 924                 $row .= '</td>';
 925
 926                 // Date/time and image link
 927                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
 928                         $selected = "class='filehistory-selected'";
 929                 }
 930                 $row .= "<td $selected style='white-space: nowrap;'>";
 931                 if ( !$file->userCan( File::DELETED_FILE ) ) {
 932                         # Don't link to unviewable files
 933                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 934                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
 935                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 936                         # Make a link to review the image
 937                         $url = $this->skin->link(
 938                                 $revdel,
 939                                 $wgLang->timeAndDate( $timestamp, true ),
 940                                 array(),
 941                                 array(
 942                                         'target' => $this->title->getPrefixedText(),
 943                                         'file' => $img,
 944                                         'token' => $wgUser->editToken( $img )
 945                                 ),
 946                                 array( 'known', 'noclasses' )
 947                         );
 948                         $row .= '<span class="history-deleted">' . $url . '</span>';
 949                 } else {
 950                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 951                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 952                 }
 953                 $row .= "</td>";
 954
 955                 // Thumbnail
 956                 if ( $this->showThumb ) {
 957                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
 958                 }
 959
 960                 // Image dimensions + size
 961                 $row .= '<td>';
 962                 $row .= htmlspecialchars( $file->getDimensionsString() );
 963                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $file->getSize() ) . ')</span>';
 964                 $row .= '</td>';
 965
 966                 // Uploading user
 967                 $row .= '<td>';
 968                 if ( $local ) {
 969                         // Hide deleted usernames
 970                         if ( $file->isDeleted( File::DELETED_USER ) ) {
 971                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 972                         } else {
 973                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 974                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 975                         }
 976                 } else {
 977                         $row .= htmlspecialchars( $usertext );
 978                 }
 979                 $row .= '</td><td>';
 980
 981                 // Don't show deleted descriptions
 982                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
 983                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 984                 } else {
 985                         $row .= $this->skin->commentBlock( $description, $this->title );
 986                 }
 987                 $row .= '</td>';
 988
 989                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
 990                 $classAttr = $rowClass ? " class='$rowClass'" : "";
 991
 992                 return "<tr{$classAttr}>{$row}</tr>\n";
 993         }
 994
 995         protected function getThumbForLine( $file ) {
 996                 global $wgLang;
 997
 998                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
 999                         $params = array(
1000                                 'width' => '120',
1001                                 'height' => '120',
1002                         );
1003                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1004
1005                         $thumbnail = $file->transform( $params );
1006                         $options = array(
1007                                 'alt' => wfMsg( 'filehist-thumbtext',
1008                                         $wgLang->timeAndDate( $timestamp, true ),
1009                                         $wgLang->date( $timestamp, true ),
1010                                         $wgLang->time( $timestamp, true ) ),
1011                                 'file-link' => true,
1012                         );
1013
1014                         if ( !$thumbnail ) return wfMsgHtml( 'filehist-nothumb' );
1015
1016                         return $thumbnail->toHtml( $options );
1017                 } else {
1018                         return wfMsgHtml( 'filehist-nothumb' );
1019                 }
1020         }
1021 }
1022
1023 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1024         function __construct( $imagePage ) {
1025                 parent::__construct();
1026                 $this->mImagePage = $imagePage;
1027                 $this->mTitle = clone ( $imagePage->getTitle() );
1028                 $this->mTitle->setFragment( '#filehistory' );
1029                 $this->mImg = null;
1030                 $this->mHist = array();
1031                 $this->mRange = array( 0, 0 ); // display range
1032         }
1033
1034         function getTitle() {
1035                 return $this->mTitle;
1036         }
1037
1038         function getQueryInfo() {
1039                 return false;
1040         }
1041
1042         function getIndexField() {
1043                 return '';
1044         }
1045
1046         function formatRow( $row ) {
1047                 return '';
1048         }
1049
1050         function getBody() {
1051                 $s = '';
1052                 $this->doQuery();
1053                 if ( count( $this->mHist ) ) {
1054                         $list = new ImageHistoryList( $this->mImagePage );
1055                         # Generate prev/next links
1056                         $navLink = $this->getNavigationBar();
1057                         $s = $list->beginImageHistoryList( $navLink );
1058                         // Skip rows there just for paging links
1059                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1060                                 $file = $this->mHist[$i];
1061                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1062                         }
1063                         $s .= $list->endImageHistoryList( $navLink );
1064                 }
1065                 return $s;
1066         }
1067
1068         function doQuery() {
1069                 if ( $this->mQueryDone ) return;
1070                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1071                 if ( !$this->mImg->exists() ) {
1072                         return;
1073                 }
1074                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1075                 if ( $this->mIsBackwards ) {
1076                         // Fetch the file history
1077                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1078                         // The current rev may not meet the offset/limit
1079                         $numRows = count( $this->mHist );
1080                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1081                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1082                         }
1083                 } else {
1084                         // The current rev may not meet the offset
1085                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1086                                 $this->mHist[] = $this->mImg;
1087                         }
1088                         // Old image versions (fetch extra row for nav links)
1089                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1090                         // Fetch the file history
1091                         $this->mHist = array_merge( $this->mHist,
1092                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1093                 }
1094                 $numRows = count( $this->mHist ); // Total number of query results
1095                 if ( $numRows ) {
1096                         # Index value of top item in the list
1097                         $firstIndex = $this->mIsBackwards ?
1098                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1099                         # Discard the extra result row if there is one
1100                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1101                                 if ( $this->mIsBackwards ) {
1102                                         # Index value of item past the index
1103                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1104                                         # Index value of bottom item in the list
1105                                         $lastIndex = $this->mHist[1]->getTimestamp();
1106                                         # Display range
1107                                         $this->mRange = array( 1, $numRows - 1 );
1108                                 } else {
1109                                         # Index value of item past the index
1110                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1111                                         # Index value of bottom item in the list
1112                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1113                                         # Display range
1114                                         $this->mRange = array( 0, $numRows - 2 );
1115                                 }
1116                         } else {
1117                                 # Setting indexes to an empty string means that they will be
1118                                 # omitted if they would otherwise appear in URLs. It just so
1119                                 # happens that this  is the right thing to do in the standard
1120                                 # UI, in all the relevant cases.
1121                                 $this->mPastTheEndIndex = '';
1122                                 # Index value of bottom item in the list
1123                                 $lastIndex = $this->mIsBackwards ?
1124                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1125                                 # Display range
1126                                 $this->mRange = array( 0, $numRows - 1 );
1127                         }
1128                 } else {
1129                         $firstIndex = '';
1130                         $lastIndex = '';
1131                         $this->mPastTheEndIndex = '';
1132                 }
1133                 if ( $this->mIsBackwards ) {
1134                         $this->mIsFirst = ( $numRows < $queryLimit );
1135                         $this->mIsLast = ( $this->mOffset == '' );
1136                         $this->mLastShown = $firstIndex;
1137                         $this->mFirstShown = $lastIndex;
1138                 } else {
1139                         $this->mIsFirst = ( $this->mOffset == '' );
1140                         $this->mIsLast = ( $numRows < $queryLimit );
1141                         $this->mLastShown = $lastIndex;
1142                         $this->mFirstShown = $firstIndex;
1143                 }
1144                 $this->mQueryDone = true;
1145         }
1146 }