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