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( $this->displayImg->exists() )
  97                         $wgOut->addHTML( $this->showTOC($showmeta) );
  98
  99                 $this->openShowImage();
 100
 101                 # No need to display noarticletext, we use our own message, output in openShowImage()
 102                 if( $this->getID() ) {
 103                         Article::view();
 104                 } else {
 105                         # Just need to set the right headers
 106                         $wgOut->setArticleFlag( true );
 107                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 108                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 109                         $this->viewUpdates();
 110
 111                         # And also show "redirected from" message
 112                         $sk = $wgUser->getSkin();
 113                         $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 114                         $wgOut->setSubtitle( wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir ) );
 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>' );
 124                 } else {
 125                         $this->checkSharedConflict();
 126                 }
 127
 128                 $this->closeShowImage();
 129                 $this->imageHistory();
 130                 // TODO: Cleanup the following
 131
 132                 $wgOut->addHTML( Xml::element( 'h2',
 133                         array( 'id' => 'filelinks' ),
 134                         wfMsg( 'imagelinks' ) ) . "\n" );
 135                 $this->imageDupes();
 136                 // TODO: We may want to find local images redirecting to a foreign
 137                 // file: "The following local files redirect to this file"
 138                 if( $this->img->isLocal() ) {
 139                         $this->imageRedirects();
 140                 }
 141                 $this->imageLinks();
 142
 143                 if( $showmeta ) {
 144                         global $wgStylePath, $wgStyleVersion;
 145                         $expand = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-expand' ) ) );
 146                         $collapse = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-collapse' ) ) );
 147                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
 148                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 149                         $wgOut->addScriptFile( 'metadata.js' );
 150                         $wgOut->addHTML(
 151                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 152                 }
 153         }
 154
 155         public function getRedirectTarget() {
 156                 $this->loadFile();
 157                 if( $this->img->isLocal() ) {
 158                         return parent::getRedirectTarget();
 159                 }
 160                 // Foreign image page
 161                 $from = $this->img->getRedirected();
 162                 $to = $this->img->getName();
 163                 if( $from == $to ) {
 164                         return null;
 165                 }
 166                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 167         }
 168         public function followRedirect() {
 169                 $this->loadFile();
 170                 if( $this->img->isLocal() ) {
 171                         return parent::followRedirect();
 172                 }
 173                 $from = $this->img->getRedirected();
 174                 $to = $this->img->getName();
 175                 if( $from == $to ) {
 176                         return false;
 177                 }
 178                 return Title::makeTitle( NS_FILE, $to );
 179         }
 180         public function isRedirect( $text = false ) {
 181                 $this->loadFile();
 182                 if( $this->img->isLocal() )
 183                         return parent::isRedirect( $text );
 184
 185                 return (bool)$this->img->getRedirected();
 186         }
 187
 188         public function isLocal() {
 189                 $this->loadFile();
 190                 return $this->img->isLocal();
 191         }
 192
 193         public function getFile() {
 194                 $this->loadFile();
 195                 return $this->img;
 196         }
 197
 198         public function getDisplayedFile() {
 199                 $this->loadFile();
 200                 return $this->displayImg;
 201         }
 202
 203         public function getDuplicates() {
 204                 $this->loadFile();
 205                 if( !is_null($this->dupes) ) {
 206                         return $this->dupes;
 207                 }
 208                 if( !( $hash = $this->img->getSha1() ) ) {
 209                         return $this->dupes = array();
 210                 }
 211                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 212                 // Remove duplicates with self and non matching file sizes
 213                 $self = $this->img->getRepoName().':'.$this->img->getName();
 214                 $size = $this->img->getSize();
 215                 foreach ( $dupes as $index => $file ) {
 216                         $key = $file->getRepoName().':'.$file->getName();
 217                         if( $key == $self )
 218                                 unset( $dupes[$index] );
 219                         if( $file->getSize() != $size )
 220                                 unset( $dupes[$index] );
 221                 }
 222                 return $this->dupes = $dupes;
 223
 224         }
 225
 226
 227         /**
 228          * Create the TOC
 229          *
 230          * @param bool $metadata Whether or not to show the metadata link
 231          * @return string
 232          */
 233         protected function showTOC( $metadata ) {
 234                 global $wgLang;
 235                 $r = '<ul id="filetoc">
 236                         <li><a href="#file">' . $wgLang->getNsText( NS_FILE ) . '</a></li>
 237                         <li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>
 238                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 239                         ($metadata ? ' <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 240                 </ul>';
 241                 return $r;
 242         }
 243
 244         /**
 245          * Make a table with metadata to be shown in the output page.
 246          *
 247          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 248          *
 249          * @param array $exif The array containing the EXIF data
 250          * @return string
 251          */
 252         protected function makeMetadataTable( $metadata ) {
 253                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 254                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 255                 foreach ( $metadata as $type => $stuff ) {
 256                         foreach ( $stuff as $v ) {
 257                                 # FIXME, why is this using escapeId for a class?!
 258                                 $class = Sanitizer::escapeId( $v['id'] );
 259                                 if( $type == 'collapsed' ) {
 260                                         $class .= ' collapsable';
 261                                 }
 262                                 $r .= "|- class=\"$class\"\n";
 263                                 $r .= "!| {$v['name']}\n";
 264                                 $r .= "|| {$v['value']}\n";
 265                         }
 266                 }
 267                 $r .= '|}';
 268                 return $r;
 269         }
 270
 271         /**
 272          * Overloading Article's getContent method.
 273          *
 274          * Omit noarticletext if sharedupload; text will be fetched from the
 275          * shared upload server if possible.
 276          */
 277         public function getContent() {
 278                 $this->loadFile();
 279                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 280                         return '';
 281                 }
 282                 return Article::getContent();
 283         }
 284
 285         protected function openShowImage() {
 286                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang, $wgContLang;
 287
 288                 $this->loadFile();
 289
 290                 $full_url  = $this->displayImg->getURL();
 291                 $linkAttribs = false;
 292                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 293                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 294                         $sizeSel = User::getDefaultOption( 'imagesize' );
 295
 296                         // The user offset might still be incorrect, specially if
 297                         // $wgImageLimits got changed (see bug #8858).
 298                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 299                                 // Default to the first offset in $wgImageLimits
 300                                 $sizeSel = 0;
 301                         }
 302                 }
 303                 $max = $wgImageLimits[$sizeSel];
 304                 $maxWidth = $max[0];
 305                 $maxHeight = $max[1];
 306                 $sk = $wgUser->getSkin();
 307                 $dirmark = $wgContLang->getDirMark();
 308
 309                 if( $this->displayImg->exists() ) {
 310                         # image
 311                         $page = $wgRequest->getIntOrNull( 'page' );
 312                         if( is_null( $page ) ) {
 313                                 $params = array();
 314                                 $page = 1;
 315                         } else {
 316                                 $params = array( 'page' => $page );
 317                         }
 318                         $width_orig = $this->displayImg->getWidth();
 319                         $width = $width_orig;
 320                         $height_orig = $this->displayImg->getHeight();
 321                         $height = $height_orig;
 322                         $mime = $this->displayImg->getMimeType();
 323                         $showLink = false;
 324                         $linkAttribs = array( 'href' => $full_url );
 325                         $longDesc = $this->displayImg->getLongDesc();
 326
 327                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) )       ;
 328
 329                         if( $this->displayImg->allowInlineDisplay() ) {
 330                                 # image
 331
 332                                 # "Download high res version" link below the image
 333                                 #$msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 334                                 # We'll show a thumbnail of this image
 335                                 if( $width > $maxWidth || $height > $maxHeight ) {
 336                                         # Calculate the thumbnail size.
 337                                         # First case, the limiting factor is the width, not the height.
 338                                         if( $width / $height >= $maxWidth / $maxHeight ) {
 339                                                 $height = round( $height * $maxWidth / $width);
 340                                                 $width = $maxWidth;
 341                                                 # Note that $height <= $maxHeight now.
 342                                         } else {
 343                                                 $newwidth = floor( $width * $maxHeight / $height);
 344                                                 $height = round( $height * $newwidth / $width );
 345                                                 $width = $newwidth;
 346                                                 # Note that $height <= $maxHeight now, but might not be identical
 347                                                 # because of rounding.
 348                                         }
 349                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 350                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 351                                                 $wgLang->formatNum( $width ),
 352                                                 $wgLang->formatNum( $height )
 353                                         );
 354                                 } else {
 355                                         # Image is small enough to show full size on image page
 356                                         $msgbig = htmlspecialchars( $this->displayImg->getName() );
 357                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 358                                 }
 359
 360                                 $params['width'] = $width;
 361                                 $thumbnail = $this->displayImg->transform( $params );
 362
 363                                 $anchorclose = "<br />";
 364                                 if( $this->displayImg->mustRender() ) {
 365                                         $showLink = true;
 366                                 } else {
 367                                         $anchorclose .=
 368                                                 $msgsmall .
 369                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 370                                 }
 371
 372                                 if( $this->displayImg->isMultipage() ) {
 373                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 374                                 }
 375
 376                                 if( $thumbnail ) {
 377                                         $options = array(
 378                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 379                                                 'file-link' => true,
 380                                         );
 381                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 382                                                 $thumbnail->toHtml( $options ) .
 383                                                 $anchorclose . '</div>' );
 384                                 }
 385
 386                                 if( $this->displayImg->isMultipage() ) {
 387                                         $count = $this->displayImg->pageCount();
 388
 389                                         if( $page > 1 ) {
 390                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 391                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 392                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 393                                                         array( 'page' => $page - 1 ) );
 394                                         } else {
 395                                                 $thumb1 = '';
 396                                         }
 397
 398                                         if( $page < $count ) {
 399                                                 $label = wfMsg( 'imgmultipagenext' );
 400                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 401                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 402                                                         array( 'page' => $page + 1 ) );
 403                                         } else {
 404                                                 $thumb2 = '';
 405                                         }
 406
 407                                         global $wgScript;
 408
 409                                         $formParams = array(
 410                                                 'name' => 'pageselector',
 411                                                 'action' => $wgScript,
 412                                                 'onchange' => 'document.pageselector.submit();',
 413                                         );
 414
 415                                         $option = array();
 416                                         for ( $i=1; $i <= $count; $i++ ) {
 417                                                 $options[] = Xml::option( $wgLang->formatNum($i), $i, $i == $page );
 418                                         }
 419                                         $select = Xml::tags( 'select',
 420                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 421                                                 implode( "\n", $options ) );
 422
 423                                         $wgOut->addHTML(
 424                                                 '</td><td><div class="multipageimagenavbox">' .
 425                                                 Xml::openElement( 'form', $formParams ) .
 426                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 427                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 428                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 429                                                 Xml::closeElement( 'form' ) .
 430                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 431                                         );
 432                                 }
 433                         } else {
 434                                 #if direct link is allowed but it's not a renderable image, show an icon.
 435                                 if( $this->displayImg->isSafeFile() ) {
 436                                         $icon= $this->displayImg->iconThumb();
 437
 438                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 439                                         $icon->toHtml( array( 'desc-link' => true ) ) .
 440                                         '</div>' );
 441                                 }
 442
 443                                 $showLink = true;
 444                         }
 445
 446
 447                         if($showLink) {
 448                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 449
 450                                 if( !$this->displayImg->isSafeFile() ) {
 451                                         $warning = wfMsgNoTrans( 'mediawarning' );
 452                                         $wgOut->addWikiText( <<<EOT
 453 <div class="fullMedia">
 454 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 455 <span class="fileInfo"> $longDesc</span>
 456 </div>
 457
 458 <div class="mediaWarning">$warning</div>
 459 EOT
 460                                                 );
 461                                 } else {
 462                                         $wgOut->addWikiText( <<<EOT
 463 <div class="fullMedia">
 464 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $longDesc</span>
 465 </div>
 466 EOT
 467                                                 );
 468                                 }
 469                         }
 470
 471                         if( !$this->displayImg->isLocal() ) {
 472                                 $this->printSharedImageText();
 473                         }
 474                 } else {
 475                         # Image does not exist
 476
 477                         $title = SpecialPage::getTitleFor( 'Upload' );
 478                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 479                                 'wpDestFile=' . urlencode( $this->displayImg->getName() ) );
 480                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 481                 }
 482         }
 483
 484         /**
 485          * Show a notice that the file is from a shared repository
 486          */
 487         protected function printSharedImageText() {
 488                 global $wgOut, $wgUser;
 489
 490                 $this->loadFile();
 491
 492                 $descUrl = $this->img->getDescriptionUrl();
 493                 $descText = $this->img->getDescriptionText();
 494                 $s = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml( 'sharedupload' );
 495                 if( $descUrl ) {
 496                         $sk = $wgUser->getSkin();
 497                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadwiki-linktext' ) );
 498                         $msg = ( $descText ) ? 'shareduploadwiki-desc' : 'shareduploadwiki';
 499                         $msg = wfMsgExt( $msg, array( 'parseinline', 'replaceafter' ), $link );
 500                         if( $msg != '-' ) {
 501                                 # Show message only if not voided by local sysops
 502                                 $s .= $msg;
 503                         }
 504                 }
 505                 $s .= "</div>";
 506                 $wgOut->addHTML( $s );
 507
 508                 if( $descText ) {
 509                         $this->mExtraDescription = $descText;
 510                 }
 511         }
 512
 513         /*
 514          * Check for files with the same name on the foreign repos.
 515          */
 516         protected function checkSharedConflict() {
 517                 global $wgOut, $wgUser;
 518
 519                 $repoGroup = RepoGroup::singleton();
 520                 if( !$repoGroup->hasForeignRepos() ) {
 521                         return;
 522                 }
 523
 524                 $this->loadFile();
 525                 if( !$this->img->isLocal() ) {
 526                         return;
 527                 }
 528
 529                 $this->dupFile = null;
 530                 $repoGroup->forEachForeignRepo( array( $this, 'checkSharedConflictCallback' ) );
 531
 532                 if( !$this->dupFile )
 533                         return;
 534                 $dupfile = $this->dupFile;
 535                 $same = (
 536                         ($this->img->getSha1() == $dupfile->getSha1()) &&
 537                         ($this->img->getSize() == $dupfile->getSize())
 538                 );
 539
 540                 $sk = $wgUser->getSkin();
 541                 $descUrl = $dupfile->getDescriptionUrl();
 542                 if( $same ) {
 543                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadduplicate-linktext' ) );
 544                         $wgOut->addHTML( '<div id="shared-image-dup">' . wfMsgWikiHtml( 'shareduploadduplicate', $link ) . '</div>' );
 545                 } else {
 546                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadconflict-linktext' ) );
 547                         $wgOut->addHTML( '<div id="shared-image-conflict">' . wfMsgWikiHtml( 'shareduploadconflict', $link ) . '</div>' );
 548                 }
 549         }
 550
 551         public function checkSharedConflictCallback( $repo ) {
 552                 $this->loadFile();
 553                 $dupfile = $repo->newFile( $this->img->getTitle() );
 554                 if( $dupfile && $dupfile->exists() ) {
 555                         $this->dupFile = $dupfile;
 556                         return $dupfile->exists();
 557                 }
 558                 return false;
 559         }
 560
 561         public function getUploadUrl() {
 562                 $this->loadFile();
 563                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 564                 return $uploadTitle->getFullUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) );
 565         }
 566
 567         /**
 568          * Print out the various links at the bottom of the image page, e.g. reupload,
 569          * external editing (and instructions link) etc.
 570          */
 571         protected function uploadLinksBox() {
 572                 global $wgUser, $wgOut;
 573
 574                 $this->loadFile();
 575                 if( !$this->img->isLocal() )
 576                         return;
 577
 578                 $sk = $wgUser->getSkin();
 579
 580                 $wgOut->addHTML( '<br /><ul>' );
 581
 582                 # "Upload a new version of this file" link
 583                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 584                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 585                         $wgOut->addHTML( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 586                 }
 587
 588                 # Link to Special:FileDuplicateSearch
 589                 $dupeLink = $sk->makeKnownLinkObj( SpecialPage::getTitleFor( 'FileDuplicateSearch', $this->mTitle->getDBkey() ), wfMsgHtml( 'imagepage-searchdupe' ) );
 590                 $wgOut->addHTML( "<li>{$dupeLink}</li>" );
 591
 592                 # External editing link
 593                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 594                 $wgOut->addHTML( '<li>' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . '</small></li>' );
 595
 596                 $wgOut->addHTML( '</ul>' );
 597         }
 598
 599         protected function closeShowImage() {} # For overloading
 600
 601         /**
 602          * If the page we've just displayed is in the "Image" namespace,
 603          * we follow it with an upload history of the image and its usage.
 604          */
 605         protected function imageHistory() {
 606                 global $wgOut, $wgUseExternalEditor;
 607
 608                 $this->loadFile();
 609                 $pager = new ImageHistoryPseudoPager( $this );
 610                 $wgOut->addHTML( $pager->getBody() );
 611
 612                 $this->img->resetHistory(); // free db resources
 613
 614                 # Exist check because we don't want to show this on pages where an image
 615                 # doesn't exist along with the noimage message, that would suck. -ævar
 616                 if( $wgUseExternalEditor && $this->img->exists() ) {
 617                         $this->uploadLinksBox();
 618                 }
 619         }
 620
 621         protected function imageLinks() {
 622                 global $wgUser, $wgOut, $wgLang;
 623
 624                 $limit = 100;
 625
 626                 $dbr = wfGetDB( DB_SLAVE );
 627
 628                 $res = $dbr->select(
 629                         array( 'imagelinks', 'page' ),
 630                         array( 'page_namespace', 'page_title' ),
 631                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 632                         __METHOD__,
 633                         array( 'LIMIT' => $limit + 1)
 634                 );
 635                 $count = $dbr->numRows( $res );
 636                 if( $count == 0 ) {
 637                         $wgOut->addHTML( "<div id='mw-imagepage-nolinkstoimage'>\n" );
 638                         $wgOut->addWikiMsg( 'nolinkstoimage' );
 639                         $wgOut->addHTML( "</div>\n" );
 640                         return;
 641                 }
 642
 643                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 644                 if( $count <= $limit - 1 ) {
 645                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 646                 } else {
 647                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 648                         $wgOut->addWikiMsg( 'linkstoimage-more',
 649                                 $wgLang->formatNum( $limit ),
 650                                 $this->mTitle->getPrefixedDBkey()
 651                         );
 652                 }
 653
 654                 $wgOut->addHTML( "<ul class='mw-imagepage-linkstoimage'>\n" );
 655                 $sk = $wgUser->getSkin();
 656                 $count = 0;
 657                 while ( $s = $res->fetchObject() ) {
 658                         $count++;
 659                         if( $count <= $limit ) {
 660                                 // We have not yet reached the extra one that tells us there is more to fetch
 661                                 $name = Title::makeTitle( $s->page_namespace, $s->page_title );
 662                                 $link = $sk->makeKnownLinkObj( $name, "" );
 663                                 $wgOut->addHTML( "<li>{$link}</li>\n" );
 664                         }
 665                 }
 666                 $wgOut->addHTML( "</ul></div>\n" );
 667                 $res->free();
 668
 669                 // Add a links to [[Special:Whatlinkshere]]
 670                 if( $count > $limit )
 671                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 672         }
 673
 674         protected function imageRedirects() {
 675                 global $wgUser, $wgOut, $wgLang;
 676
 677                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 678                 if( count( $redirects ) == 0 ) return;
 679
 680                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 681                 $wgOut->addWikiMsg( 'redirectstofile',
 682                         $wgLang->formatNum( count( $redirects ) )
 683                 );
 684                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 685
 686                 $sk = $wgUser->getSkin();
 687                 foreach ( $redirects as $title ) {
 688                         $link = $sk->makeKnownLinkObj( $title, "", "redirect=no" );
 689                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 690                 }
 691                 $wgOut->addHTML( "</ul></div>\n" );
 692
 693         }
 694
 695         protected function imageDupes() {
 696                 global $wgOut, $wgUser, $wgLang;
 697
 698                 $this->loadFile();
 699
 700                 $dupes = $this->getDuplicates();
 701                 if( count( $dupes ) == 0 ) return;
 702
 703                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 704                 $wgOut->addWikiMsg( 'duplicatesoffile',
 705                         $wgLang->formatNum( count( $dupes ) )
 706                 );
 707                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 708
 709                 $sk = $wgUser->getSkin();
 710                 foreach ( $dupes as $file ) {
 711                         if( $file->isLocal() )
 712                                 $link = $sk->makeKnownLinkObj( $file->getTitle(), "" );
 713                         else {
 714                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 715                                         $file->getTitle()->getPrefixedText() );
 716                         }
 717                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 718                 }
 719                 $wgOut->addHTML( "</ul></div>\n" );
 720         }
 721
 722         /**
 723          * Delete the file, or an earlier version of it
 724          */
 725         public function delete() {
 726                 $this->loadFile();
 727                 if( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 728                         // Standard article deletion
 729                         Article::delete();
 730                         return;
 731                 }
 732                 $deleter = new FileDeleteForm( $this->img );
 733                 $deleter->execute();
 734         }
 735
 736         /**
 737          * Revert the file to an earlier version
 738          */
 739         public function revert() {
 740                 $this->loadFile();
 741                 $reverter = new FileRevertForm( $this->img );
 742                 $reverter->execute();
 743         }
 744
 745         /**
 746          * Override handling of action=purge
 747          */
 748         public function doPurge() {
 749                 $this->loadFile();
 750                 if( $this->img->exists() ) {
 751                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 752                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 753                         $update->doUpdate();
 754                         $this->img->upgradeRow();
 755                         $this->img->purgeCache();
 756                 } else {
 757                         wfDebug( "ImagePage::doPurge no image\n" );
 758                 }
 759                 parent::doPurge();
 760         }
 761
 762         /**
 763          * Display an error with a wikitext description
 764          */
 765         function showError( $description ) {
 766                 global $wgOut;
 767                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 768                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 769                 $wgOut->setArticleRelated( false );
 770                 $wgOut->enableClientCache( false );
 771                 $wgOut->addWikiText( $description );
 772         }
 773
 774 }
 775
 776 /**
 777  * Builds the image revision log shown on image pages
 778  *
 779  * @ingroup Media
 780  */
 781 class ImageHistoryList {
 782
 783         protected $imagePage, $img, $skin, $title, $repo;
 784
 785         public function __construct( $imagePage ) {
 786                 global $wgUser;
 787                 $this->skin = $wgUser->getSkin();
 788                 $this->current = $imagePage->getFile();
 789                 $this->img = $imagePage->getDisplayedFile();
 790                 $this->title = $imagePage->getTitle();
 791                 $this->imagePage = $imagePage;
 792         }
 793
 794         public function getImagePage() {
 795                 return $this->imagePage;
 796         }
 797
 798         public function getSkin() {
 799                 return $this->skin;
 800         }
 801
 802         public function getFile() {
 803                 return $this->img;
 804         }
 805
 806         public function beginImageHistoryList( $navLinks = '' ) {
 807                 global $wgOut, $wgUser;
 808                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) )
 809                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 810                         . $navLinks
 811                         . Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
 812                         . '<tr><td></td>'
 813                         . ( $this->current->isLocal() && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ? '<td></td>' : '' )
 814                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 815                         . '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>'
 816                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 817                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 818                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 819                         . "</tr>\n";
 820         }
 821
 822         public function endImageHistoryList( $navLinks = '' ) {
 823                 return "</table>\n$navLinks\n";
 824         }
 825
 826         public function imageHistoryLine( $iscur, $file ) {
 827                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 828
 829                 $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 830                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 831                 $user = $file->getUser('id');
 832                 $usertext = $file->getUser('text');
 833                 $size = $file->getSize();
 834                 $description = $file->getDescription();
 835                 $dims = $file->getDimensionsString();
 836                 $sha1 = $file->getSha1();
 837
 838                 $local = $this->current->isLocal();
 839                 $row = $css = $selected = '';
 840
 841                 // Deletion link
 842                 if( $local && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ) {
 843                         $row .= '<td>';
 844                         # Link to remove from history
 845                         if( $wgUser->isAllowed( 'delete' ) ) {
 846                                 $q = array();
 847                                 $q[] = 'action=delete';
 848                                 if( !$iscur )
 849                                         $q[] = 'oldimage=' . urlencode( $img );
 850                                 $row .= $this->skin->makeKnownLinkObj(
 851                                         $this->title,
 852                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 853                                         implode( '&', $q )
 854                                 );
 855                         }
 856                         # Link to hide content
 857                         if( $wgUser->isAllowed( 'deleterevision' ) ) {
 858                                 if( $wgUser->isAllowed('delete') ) {
 859                                         $row .= '<br/>';
 860                                 }
 861                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 862                                 // If file is top revision or locked from this user, don't link
 863                                 if( $iscur || !$file->userCan(File::DELETED_RESTRICTED) ) {
 864                                         $del = wfMsgHtml( 'rev-delundel' );
 865                                 } else {
 866                                         // If the file was hidden, link to sha-1
 867                                         list($ts,$name) = explode('!',$img,2);
 868                                         $del = $this->skin->makeKnownLinkObj( $revdel,  wfMsg( 'rev-delundel' ),
 869                                                 'target=' . urlencode( $wgTitle->getPrefixedText() ) .
 870                                                 '&oldimage=' . urlencode( $ts ) );
 871                                         // Bolden oversighted content
 872                                         if( $file->isDeleted(File::DELETED_RESTRICTED) )
 873                                                 $del = "<strong>$del</strong>";
 874                                 }
 875                                 $row .= "<tt style='white-space: nowrap;'><small>$del</small></tt>";
 876                         }
 877                         $row .= '</td>';
 878                 }
 879
 880                 // Reversion link/current indicator
 881                 $row .= '<td>';
 882                 if( $iscur ) {
 883                         $row .= wfMsgHtml( 'filehist-current' );
 884                 } elseif( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 885                         if( $file->isDeleted(File::DELETED_FILE) ) {
 886                                 $row .= wfMsgHtml('filehist-revert');
 887                         } else {
 888                                 $q = array();
 889                                 $q[] = 'action=revert';
 890                                 $q[] = 'oldimage=' . urlencode( $img );
 891                                 $q[] = 'wpEditToken=' . urlencode( $wgUser->editToken( $img ) );
 892                                 $row .= $this->skin->makeKnownLinkObj( $this->title,
 893                                         wfMsgHtml( 'filehist-revert' ),
 894                                         implode( '&', $q ) );
 895                         }
 896                 }
 897                 $row .= '</td>';
 898
 899                 // Date/time and image link
 900                 if( $file->getTimestamp() === $this->img->getTimestamp() ) {
 901                         $selected = "class='filehistory-selected'";
 902                 }
 903                 $row .= "<td $selected style='white-space: nowrap;'>";
 904                 if( !$file->userCan(File::DELETED_FILE) ) {
 905                         # Don't link to unviewable files
 906                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 907                 } else if( $file->isDeleted(File::DELETED_FILE) ) {
 908                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 909                         # Make a link to review the image
 910                         $url = $this->skin->makeKnownLinkObj( $revdel, $wgLang->timeAndDate( $timestamp, true ),
 911                                 "target=".$wgTitle->getPrefixedText()."&file=$sha1.".$this->current->getExtension() );
 912                         $row .= '<span class="history-deleted">'.$url.'</span>';
 913                 } else {
 914                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 915                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 916                 }
 917
 918                 // Thumbnail
 919                 if( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
 920                         $params = array(
 921                                 'width' => '120',
 922                                 'height' => '120',
 923                         );
 924                         $thumbnail = $file->transform( $params );
 925                         $options = array(
 926                                 'alt' => wfMsg( 'filehist-thumbtext', $wgLang->timeAndDate( $timestamp, true ) ),
 927                                 'file-link' => true,
 928                         );
 929                         $row .= '</td><td>' . $thumbnail->toHtml( $options );
 930                 } else {
 931                         $row .= '</td><td>' . wfMsgHtml( 'filehist-nothumb' );
 932                 }
 933                 $row .= "</td><td>";
 934
 935                 // Image dimensions
 936                 $row .= htmlspecialchars( $dims );
 937
 938                 // File size
 939                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $size ) . ')</span>';
 940
 941                 // Uploading user
 942                 $row .= '</td><td>';
 943                 if( $local ) {
 944                         // Hide deleted usernames
 945                         if( $file->isDeleted(File::DELETED_USER) ) {
 946                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 947                         } else {
 948                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 949                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 950                         }
 951                 } else {
 952                         $row .= htmlspecialchars( $usertext );
 953                 }
 954                 $row .= '</td><td>';
 955
 956                 // Don't show deleted descriptions
 957                 if( $file->isDeleted(File::DELETED_COMMENT) ) {
 958                         $row .= '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 959                 } else {
 960                         $row .= $this->skin->commentBlock( $description, $this->title );
 961                 }
 962                 $row .= '</td>';
 963
 964                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
 965                 $classAttr = $rowClass ? " class='$rowClass'" : "";
 966
 967                 return "<tr{$classAttr}>{$row}</tr>\n";
 968         }
 969 }
 970
 971 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
 972         function __construct( $imagePage ) {
 973                 parent::__construct();
 974                 $this->mImagePage = $imagePage;
 975                 $this->mTitle = clone( $imagePage->getTitle() );
 976                 $this->mTitle->setFragment( '#filehistory' );
 977                 $this->mImg = NULL;
 978                 $this->mHist = array();
 979                 $this->mRange = array( 0, 0 ); // display range
 980         }
 981
 982         function getTitle() {
 983                 return $this->mTitle;
 984         }
 985
 986         function getQueryInfo() {
 987                 return false;
 988         }
 989
 990         function getIndexField() {
 991                 return '';
 992         }
 993
 994         function formatRow( $row ) {
 995                 return '';
 996         }
 997
 998         function getBody() {
 999                 $s = '';
1000                 $this->doQuery();
1001                 if( count($this->mHist) ) {
1002                         $list = new ImageHistoryList( $this->mImagePage );
1003                         # Generate prev/next links
1004                         $navLink = $this->getNavigationBar();
1005                         $s = $list->beginImageHistoryList($navLink);
1006                         // Skip rows there just for paging links
1007                         for( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1008                                 $file = $this->mHist[$i];
1009                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1010                         }
1011                         $s .= $list->endImageHistoryList($navLink);
1012                 }
1013                 return $s;
1014         }
1015
1016         function doQuery() {
1017                 if( $this->mQueryDone ) return;
1018                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1019                 if( !$this->mImg->exists() ) {
1020                         return;
1021                 }
1022                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1023                 if( $this->mIsBackwards ) {
1024                         // Fetch the file history
1025                         $this->mHist = $this->mImg->getHistory($queryLimit,null,$this->mOffset,false);
1026                         // The current rev may not meet the offset/limit
1027                         $numRows = count($this->mHist);
1028                         if( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1029                                 $this->mHist = array_merge( array($this->mImg), $this->mHist );
1030                         }
1031                 } else {
1032                         // The current rev may not meet the offset
1033                         if( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1034                                 $this->mHist[] = $this->mImg;
1035                         }
1036                         // Old image versions (fetch extra row for nav links)
1037                         $oiLimit = count($this->mHist) ? $this->mLimit : $this->mLimit+1;
1038                         // Fetch the file history
1039                         $this->mHist = array_merge( $this->mHist,
1040                                 $this->mImg->getHistory($oiLimit,$this->mOffset,null,false) );
1041                 }
1042                 $numRows = count($this->mHist); // Total number of query results
1043                 if( $numRows ) {
1044                         # Index value of top item in the list
1045                         $firstIndex = $this->mIsBackwards ?
1046                                 $this->mHist[$numRows-1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1047                         # Discard the extra result row if there is one
1048                         if( $numRows > $this->mLimit && $numRows > 1 ) {
1049                                 if( $this->mIsBackwards ) {
1050                                         # Index value of item past the index
1051                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1052                                         # Index value of bottom item in the list
1053                                         $lastIndex = $this->mHist[1]->getTimestamp();
1054                                         # Display range
1055                                         $this->mRange = array( 1, $numRows-1 );
1056                                 } else {
1057                                         # Index value of item past the index
1058                                         $this->mPastTheEndIndex = $this->mHist[$numRows-1]->getTimestamp();
1059                                         # Index value of bottom item in the list
1060                                         $lastIndex = $this->mHist[$numRows-2]->getTimestamp();
1061                                         # Display range
1062                                         $this->mRange = array( 0, $numRows-2 );
1063                                 }
1064                         } else {
1065                                 # Setting indexes to an empty string means that they will be
1066                                 # omitted if they would otherwise appear in URLs. It just so
1067                                 # happens that this  is the right thing to do in the standard
1068                                 # UI, in all the relevant cases.
1069                                 $this->mPastTheEndIndex = '';
1070                                 # Index value of bottom item in the list
1071                                 $lastIndex = $this->mIsBackwards ?
1072                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows-1]->getTimestamp();
1073                                 # Display range
1074                                 $this->mRange = array( 0, $numRows-1 );
1075                         }
1076                 } else {
1077                         $firstIndex = '';
1078                         $lastIndex = '';
1079                         $this->mPastTheEndIndex = '';
1080                 }
1081                 if( $this->mIsBackwards ) {
1082                         $this->mIsFirst = ( $numRows < $queryLimit );
1083                         $this->mIsLast = ( $this->mOffset == '' );
1084                         $this->mLastShown = $firstIndex;
1085                         $this->mFirstShown = $lastIndex;
1086                 } else {
1087                         $this->mIsFirst = ( $this->mOffset == '' );
1088                         $this->mIsLast = ( $numRows < $queryLimit );
1089                         $this->mLastShown = $lastIndex;
1090                         $this->mFirstShown = $firstIndex;
1091                 }
1092                 $this->mQueryDone = true;
1093         }
1094 }