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