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         /**
  27          * @param  $file File:
  28          * @return void
  29          */
  30         public function setFile( $file ) {
  31                 $this->displayImg = $file;
  32                 $this->img = $file;
  33                 $this->fileLoaded = true;
  34         }
  35
  36         protected function loadFile() {
  37                 if ( $this->fileLoaded ) {
  38                         return true;
  39                 }
  40                 $this->fileLoaded = true;
  41
  42                 $this->displayImg = $this->img = false;
  43                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  44                 if ( !$this->img ) {
  45                         $this->img = wfFindFile( $this->mTitle );
  46                         if ( !$this->img ) {
  47                                 $this->img = wfLocalFile( $this->mTitle );
  48                         }
  49                 }
  50                 if ( !$this->displayImg ) {
  51                         $this->displayImg = $this->img;
  52                 }
  53                 $this->repo = $this->img->getRepo();
  54         }
  55
  56         /**
  57          * Handler for action=render
  58          * Include body text only; none of the image extras
  59          */
  60         public function render() {
  61                 global $wgOut;
  62                 $wgOut->setArticleBodyOnly( true );
  63                 parent::view();
  64         }
  65
  66         public function view() {
  67                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  68
  69                 $diff = $wgRequest->getVal( 'diff' );
  70                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  71
  72                 if ( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  73                         return parent::view();
  74                 }
  75
  76                 $this->loadFile();
  77
  78                 if ( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  79                         if ( $this->mTitle->getDBkey() == $this->img->getName() || isset( $diff ) ) {
  80                                 // mTitle is the same as the redirect target so ask Article
  81                                 // to perform the redirect for us.
  82                                 $wgRequest->setVal( 'diffonly', 'true' );
  83                                 return parent::view();
  84                         } else {
  85                                 // mTitle is not the same as the redirect target so it is
  86                                 // probably the redirect page itself. Fake the redirect symbol
  87                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  88                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  89                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  90                                 $this->viewUpdates();
  91                                 return;
  92                         }
  93                 }
  94
  95                 $this->showRedirectedFromHeader();
  96
  97                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
  98                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  99                         $formattedMetadata = $this->displayImg->formatMetadata();
 100                         $showmeta = $formattedMetadata !== false;
 101                 } else {
 102                         $showmeta = false;
 103                 }
 104
 105                 if ( !$diff && $this->displayImg->exists() )
 106                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 107
 108                 if ( !$diff )
 109                         $this->openShowImage();
 110
 111                 # No need to display noarticletext, we use our own message, output in openShowImage()
 112                 if ( $this->getID() ) {
 113                         parent::view();
 114                 } else {
 115                         # Just need to set the right headers
 116                         $wgOut->setArticleFlag( true );
 117                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 118                         $this->viewUpdates();
 119                 }
 120
 121                 # Show shared description, if needed
 122                 if ( $this->mExtraDescription ) {
 123                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
 124                         if ( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
 125                                 $wgOut->addWikiText( $fol );
 126                         }
 127                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 128                 }
 129
 130                 $this->closeShowImage();
 131                 $this->imageHistory();
 132                 // TODO: Cleanup the following
 133
 134                 $wgOut->addHTML( Xml::element( 'h2',
 135                         array( 'id' => 'filelinks' ),
 136                         wfMsg( 'imagelinks' ) ) . "\n" );
 137                 $this->imageDupes();
 138                 # TODO! FIXME! For some freaky reason, we can't redirect to foreign images.
 139                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 140                 $this->imageRedirects();
 141                 $this->imageLinks();
 142
 143                 # Allow extensions to add something after the image links
 144                 $html = '';
 145                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 146                 if ( $html )
 147                         $wgOut->addHTML( $html );
 148
 149                 if ( $showmeta ) {
 150                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 151                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 152                         $wgOut->addModules( array( 'mediawiki.legacy.metadata' ) );
 153                 }
 154
 155                 $css = $this->repo->getDescriptionStylesheetUrl();
 156                 if ( $css ) {
 157                         $wgOut->addStyle( $css );
 158                 }
 159         }
 160
 161         public function getRedirectTarget() {
 162                 $this->loadFile();
 163                 if ( $this->img->isLocal() ) {
 164                         return parent::getRedirectTarget();
 165                 }
 166                 // Foreign image page
 167                 $from = $this->img->getRedirected();
 168                 $to = $this->img->getName();
 169                 if ( $from == $to ) {
 170                         return null;
 171                 }
 172                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 173         }
 174         public function followRedirect() {
 175                 $this->loadFile();
 176                 if ( $this->img->isLocal() ) {
 177                         return parent::followRedirect();
 178                 }
 179                 $from = $this->img->getRedirected();
 180                 $to = $this->img->getName();
 181                 if ( $from == $to ) {
 182                         return false;
 183                 }
 184                 return Title::makeTitle( NS_FILE, $to );
 185         }
 186         public function isRedirect( $text = false ) {
 187                 $this->loadFile();
 188                 if ( $this->img->isLocal() )
 189                         return parent::isRedirect( $text );
 190
 191                 return (bool)$this->img->getRedirected();
 192         }
 193
 194         public function isLocal() {
 195                 $this->loadFile();
 196                 return $this->img->isLocal();
 197         }
 198
 199         public function getFile() {
 200                 $this->loadFile();
 201                 return $this->img;
 202         }
 203
 204         public function getDisplayedFile() {
 205                 $this->loadFile();
 206                 return $this->displayImg;
 207         }
 208
 209         public function getDuplicates() {
 210                 $this->loadFile();
 211                 if ( !is_null( $this->dupes ) ) {
 212                         return $this->dupes;
 213                 }
 214                 if ( !( $hash = $this->img->getSha1() ) ) {
 215                         return $this->dupes = array();
 216                 }
 217                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 218                 // Remove duplicates with self and non matching file sizes
 219                 $self = $this->img->getRepoName() . ':' . $this->img->getName();
 220                 $size = $this->img->getSize();
 221                 foreach ( $dupes as $index => $file ) {
 222                         $key = $file->getRepoName() . ':' . $file->getName();
 223                         if ( $key == $self )
 224                                 unset( $dupes[$index] );
 225                         if ( $file->getSize() != $size )
 226                                 unset( $dupes[$index] );
 227                 }
 228                 return $this->dupes = $dupes;
 229
 230         }
 231
 232
 233         /**
 234          * Create the TOC
 235          *
 236          * @param $metadata Boolean: whether or not to show the metadata link
 237          * @return String
 238          */
 239         protected function showTOC( $metadata ) {
 240                 $r = array(
 241                                 '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 242                                 '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 243                                 '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 244                 );
 245                 if ( $metadata ) {
 246                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 247                 }
 248
 249                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 250
 251                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 252         }
 253
 254         /**
 255          * Make a table with metadata to be shown in the output page.
 256          *
 257          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 258          *
 259          * @param $metadata Array: the array containing the EXIF data
 260          * @return String
 261          */
 262         protected function makeMetadataTable( $metadata ) {
 263                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 264                 $r .= wfMsgNoTrans( 'metadata-help' );
 265                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 266                 foreach ( $metadata as $type => $stuff ) {
 267                         foreach ( $stuff as $v ) {
 268                                 # FIXME, why is this using escapeId for a class?!
 269                                 $class = Sanitizer::escapeId( $v['id'] );
 270                                 if ( $type == 'collapsed' ) {
 271                                         $class .= ' collapsable';
 272                                 }
 273                                 $r .= "<tr class=\"$class\">\n";
 274                                 $r .= "<th>{$v['name']}</th>\n";
 275                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 276                         }
 277                 }
 278                 $r .= "</table>\n</div>\n";
 279                 return $r;
 280         }
 281
 282         /**
 283          * Overloading Article's getContent method.
 284          *
 285          * Omit noarticletext if sharedupload; text will be fetched from the
 286          * shared upload server if possible.
 287          */
 288         public function getContent() {
 289                 $this->loadFile();
 290                 if ( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 291                         return '';
 292                 }
 293                 return Article::getContent();
 294         }
 295
 296         protected function openShowImage() {
 297                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 298                         $wgLang, $wgContLang, $wgEnableUploads;
 299
 300                 $this->loadFile();
 301
 302                 $full_url  = $this->displayImg->getURL();
 303                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 304                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 305                         $sizeSel = User::getDefaultOption( 'imagesize' );
 306
 307                         // The user offset might still be incorrect, specially if
 308                         // $wgImageLimits got changed (see bug #8858).
 309                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 310                                 // Default to the first offset in $wgImageLimits
 311                                 $sizeSel = 0;
 312                         }
 313                 }
 314                 $max = $wgImageLimits[$sizeSel];
 315                 $maxWidth = $max[0];
 316                 $maxHeight = $max[1];
 317                 $sk = $wgUser->getSkin();
 318                 $dirmark = $wgContLang->getDirMark();
 319
 320                 if ( $this->displayImg->exists() ) {
 321                         # image
 322                         $page = $wgRequest->getIntOrNull( 'page' );
 323                         if ( is_null( $page ) ) {
 324                                 $params = array();
 325                                 $page = 1;
 326                         } else {
 327                                 $params = array( 'page' => $page );
 328                         }
 329                         $width_orig = $this->displayImg->getWidth( $page );
 330                         $width = $width_orig;
 331                         $height_orig = $this->displayImg->getHeight( $page );
 332                         $height = $height_orig;
 333
 334                         $longDesc = $this->displayImg->getLongDesc();
 335
 336                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 337
 338                         if ( $this->displayImg->allowInlineDisplay() ) {
 339                                 # image
 340
 341                                 # "Download high res version" link below the image
 342                                 # $msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 343                                 # We'll show a thumbnail of this image
 344                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 345                                         # Calculate the thumbnail size.
 346                                         # First case, the limiting factor is the width, not the height.
 347                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 348                                                 $height = round( $height * $maxWidth / $width );
 349                                                 $width = $maxWidth;
 350                                                 # Note that $height <= $maxHeight now.
 351                                         } else {
 352                                                 $newwidth = floor( $width * $maxHeight / $height );
 353                                                 $height = round( $height * $newwidth / $width );
 354                                                 $width = $newwidth;
 355                                                 # Note that $height <= $maxHeight now, but might not be identical
 356                                                 # because of rounding.
 357                                         }
 358                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 359                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 360                                                 $wgLang->formatNum( $width ),
 361                                                 $wgLang->formatNum( $height )
 362                                         );
 363                                 } else {
 364                                         # Image is small enough to show full size on image page
 365                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 366                                 }
 367
 368                                 $params['width'] = $width;
 369                                 $thumbnail = $this->displayImg->transform( $params );
 370
 371                                 $showLink = true;
 372                                 $anchorclose = '';
 373                                 if ( !$this->displayImg->mustRender() ) {
 374                                         $anchorclose = "<br />" . $msgsmall;
 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                                         for ( $i = 1; $i <= $count; $i++ ) {
 434                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 435                                         }
 436                                         $select = Xml::tags( 'select',
 437                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 438                                                 implode( "\n", $options ) );
 439
 440                                         $wgOut->addHTML(
 441                                                 '</td><td><div class="multipageimagenavbox">' .
 442                                                 Xml::openElement( 'form', $formParams ) .
 443                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 444                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 445                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 446                                                 Xml::closeElement( 'form' ) .
 447                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 448                                         );
 449                                 }
 450                         } else {
 451                                 # if direct link is allowed but it's not a renderable image, show an icon.
 452                                 if ( $this->displayImg->isSafeFile() ) {
 453                                         $icon = $this->displayImg->iconThumb();
 454
 455                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 456                                         $icon->toHtml( array( 'file-link' => true ) ) .
 457                                         "</div>\n" );
 458                                 }
 459
 460                                 $showLink = true;
 461                         }
 462
 463
 464                         if ( $showLink ) {
 465                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 466                                 $linktext = $filename;
 467                                 if ( isset( $msgbig ) ) {
 468                                         $linktext = wfEscapeWikiText( $msgbig );
 469                                 }
 470                                 $medialink = "[[Media:$filename|$linktext]]";
 471
 472                                 if ( !$this->displayImg->isSafeFile() ) {
 473                                         $warning = wfMsgNoTrans( 'mediawarning' );
 474                                         $wgOut->addWikiText( <<<EOT
 475 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 476 <div class="mediaWarning">$warning</div>
 477 EOT
 478                                                 );
 479                                 } else {
 480                                         $wgOut->addWikiText( <<<EOT
 481 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 482 </div>
 483 EOT
 484                                         );
 485                                 }
 486                         }
 487
 488                         if ( !$this->displayImg->isLocal() ) {
 489                                 $this->printSharedImageText();
 490                         }
 491                 } else {
 492                         # Image does not exist
 493                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 494                                 // Only show an upload link if the user can upload
 495                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 496                                 $nofile = array(
 497                                         'filepage-nofile-link',
 498                                         $uploadTitle->getFullUrl( array( 'wpDestFile' => $this->img->getName() ) )
 499                                 );
 500                         }
 501                         else
 502                         {
 503                                 $nofile = 'filepage-nofile';
 504                         }
 505                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 506                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 507                 }
 508         }
 509
 510         /**
 511          * Show a notice that the file is from a shared repository
 512          */
 513         protected function printSharedImageText() {
 514                 global $wgOut;
 515
 516                 $this->loadFile();
 517
 518                 $descUrl = $this->img->getDescriptionUrl();
 519                 $descText = $this->img->getDescriptionText();
 520
 521                 if( $descUrl ) {
 522                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 523                 }
 524
 525                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 526                 $repo = $this->img->getRepo()->getDisplayName();
 527
 528                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 529                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 530                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 531                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 532                 } else {
 533                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 534                 }
 535
 536                 if ( $descText ) {
 537                         $this->mExtraDescription = $descText;
 538                 }
 539         }
 540
 541         public function getUploadUrl() {
 542                 $this->loadFile();
 543                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 544                 return $uploadTitle->getFullUrl( array(
 545                         'wpDestFile' => $this->img->getName(),
 546                         'wpForReUpload' => 1
 547                  ) );
 548         }
 549
 550         /**
 551          * Print out the various links at the bottom of the image page, e.g. reupload,
 552          * external editing (and instructions link) etc.
 553          */
 554         protected function uploadLinksBox() {
 555                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 556
 557                 if ( !$wgEnableUploads ) { return; }
 558
 559                 $this->loadFile();
 560                 if ( !$this->img->isLocal() )
 561                         return;
 562
 563                 $sk = $wgUser->getSkin();
 564
 565                 $wgOut->addHTML( "<br /><ul>\n" );
 566
 567                 # "Upload a new version of this file" link
 568                 if ( UploadBase::userCanReUpload( $wgUser, $this->img->name ) ) {
 569                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 570                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 571                 }
 572
 573                 # External editing link
 574                 if ( $wgUseExternalEditor ) {
 575                         $elink = $sk->link(
 576                                 $this->mTitle,
 577                                 wfMsgHtml( 'edit-externally' ),
 578                                 array(),
 579                                 array(
 580                                         'action' => 'edit',
 581                                         'externaledit' => 'true',
 582                                         'mode' => 'file'
 583                                 ),
 584                                 array( 'known', 'noclasses' )
 585                         );
 586                         $wgOut->addHTML( '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . "</small></li>\n" );
 587                 }
 588
 589                 $wgOut->addHTML( "</ul>\n" );
 590         }
 591
 592         protected function closeShowImage() { } # For overloading
 593
 594         /**
 595          * If the page we've just displayed is in the "Image" namespace,
 596          * we follow it with an upload history of the image and its usage.
 597          */
 598         protected function imageHistory() {
 599                 global $wgOut;
 600
 601                 $this->loadFile();
 602                 $pager = new ImageHistoryPseudoPager( $this );
 603                 $wgOut->addHTML( $pager->getBody() );
 604
 605                 $this->img->resetHistory(); // free db resources
 606
 607                 # Exist check because we don't want to show this on pages where an image
 608                 # doesn't exist along with the noimage message, that would suck. -ævar
 609                 if ( $this->img->exists() ) {
 610                         $this->uploadLinksBox();
 611                 }
 612         }
 613
 614         protected function imageLinks() {
 615                 global $wgUser, $wgOut, $wgLang;
 616
 617                 $limit = 100;
 618
 619                 $dbr = wfGetDB( DB_SLAVE );
 620
 621                 $res = $dbr->select(
 622                         array( 'imagelinks', 'page' ),
 623                         array( 'page_namespace', 'page_title' ),
 624                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 625                         __METHOD__,
 626                         array( 'LIMIT' => $limit + 1 )
 627                 );
 628                 $count = $dbr->numRows( $res );
 629                 if ( $count == 0 ) {
 630                         $wgOut->wrapWikiMsg( Html::rawElement( 'div', array ( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ), 'nolinkstoimage' );
 631                         return;
 632                 }
 633
 634                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 635                 if ( $count <= $limit - 1 ) {
 636                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 637                 } else {
 638                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 639                         $wgOut->addWikiMsg( 'linkstoimage-more',
 640                                 $wgLang->formatNum( $limit ),
 641                                 $this->mTitle->getPrefixedDBkey()
 642                         );
 643                 }
 644
 645                 $wgOut->addHTML( Html::openElement( 'ul', array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n" );
 646                 $sk = $wgUser->getSkin();
 647                 $count = 0;
 648                 $elements = array();
 649                 foreach ( $res as $s ) {
 650                         $count++;
 651                         if ( $count <= $limit ) {
 652                                 // We have not yet reached the extra one that tells us there is more to fetch
 653                                 $elements[] =  $s;
 654                         }
 655                 }
 656
 657                 // Sort the list by namespace:title
 658                 usort ( $elements, array( $this, 'compare' ) );
 659
 660                 // Create links for every element
 661                 foreach( $elements as $element ) {
 662                         $link = $sk->linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 663                         $wgOut->addHTML( Html::rawElement(
 664                                                 'li',
 665                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 666                                                 $link
 667                                         ) . "\n"
 668                         );
 669
 670                 };
 671                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 672                 $res->free();
 673
 674                 // Add a links to [[Special:Whatlinkshere]]
 675                 if ( $count > $limit ) {
 676                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 677                 }
 678                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 679         }
 680
 681         protected function imageRedirects() {
 682                 global $wgUser, $wgOut, $wgLang;
 683
 684                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 685                 if ( count( $redirects ) == 0 ) return;
 686
 687                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 688                 $wgOut->addWikiMsg( 'redirectstofile',
 689                         $wgLang->formatNum( count( $redirects ) )
 690                 );
 691                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 692
 693                 $sk = $wgUser->getSkin();
 694                 foreach ( $redirects as $title ) {
 695                         $link = $sk->link(
 696                                 $title,
 697                                 null,
 698                                 array(),
 699                                 array( 'redirect' => 'no' ),
 700                                 array( 'known', 'noclasses' )
 701                         );
 702                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 703                 }
 704                 $wgOut->addHTML( "</ul></div>\n" );
 705
 706         }
 707
 708         protected function imageDupes() {
 709                 global $wgOut, $wgUser, $wgLang;
 710
 711                 $this->loadFile();
 712
 713                 $dupes = $this->getDuplicates();
 714                 if ( count( $dupes ) == 0 ) return;
 715
 716                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 717                 $wgOut->addWikiMsg( 'duplicatesoffile',
 718                         $wgLang->formatNum( count( $dupes ) ), $this->mTitle->getDBkey()
 719                 );
 720                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 721
 722                 $sk = $wgUser->getSkin();
 723                 foreach ( $dupes as $file ) {
 724                         $fromSrc = '';
 725                         if ( $file->isLocal() ) {
 726                                 $link = $sk->link(
 727                                         $file->getTitle(),
 728                                         null,
 729                                         array(),
 730                                         array(),
 731                                         array( 'known', 'noclasses' )
 732                                 );
 733                         } else {
 734                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 735                                         $file->getTitle()->getPrefixedText() );
 736                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 737                         }
 738                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 739                 }
 740                 $wgOut->addHTML( "</ul></div>\n" );
 741         }
 742
 743         /**
 744          * Delete the file, or an earlier version of it
 745          */
 746         public function delete() {
 747                 global $wgUploadMaintenance;
 748                 if ( $wgUploadMaintenance && $this->mTitle && $this->mTitle->getNamespace() == NS_FILE ) {
 749                         global $wgOut;
 750                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 751                         return;
 752                 }
 753
 754                 $this->loadFile();
 755                 if ( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 756                         // Standard article deletion
 757                         parent::delete();
 758                         return;
 759                 }
 760                 $deleter = new FileDeleteForm( $this->img );
 761                 $deleter->execute();
 762         }
 763
 764         /**
 765          * Revert the file to an earlier version
 766          */
 767         public function revert() {
 768                 $this->loadFile();
 769                 $reverter = new FileRevertForm( $this->img );
 770                 $reverter->execute();
 771         }
 772
 773         /**
 774          * Override handling of action=purge
 775          */
 776         public function doPurge() {
 777                 $this->loadFile();
 778                 if ( $this->img->exists() ) {
 779                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 780                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 781                         $update->doUpdate();
 782                         $this->img->upgradeRow();
 783                         $this->img->purgeCache();
 784                 } else {
 785                         wfDebug( "ImagePage::doPurge no image for " . $this->img->getName() . "; limiting purge to cache only\n" );
 786                         // even if the file supposedly doesn't exist, force any cached information
 787                         // to be updated (in case the cached information is wrong)
 788                         $this->img->purgeCache();
 789                 }
 790                 parent::doPurge();
 791         }
 792
 793         /**
 794          * Display an error with a wikitext description
 795          */
 796         function showError( $description ) {
 797                 global $wgOut;
 798                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 799                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 800                 $wgOut->setArticleRelated( false );
 801                 $wgOut->enableClientCache( false );
 802                 $wgOut->addWikiText( $description );
 803         }
 804
 805
 806         /**
 807          * Callback for usort() to do link sorts by (namespace, title)
 808          * Function copied from Title::compare()
 809          *
 810          * @param $a object page to compare with
 811          * @param $b object page to compare with
 812          * @return Integer: result of string comparison, or namespace comparison
 813          */
 814         protected function compare( $a, $b ) {
 815                 if ( $a->page_namespace == $b->page_namespace ) {
 816                         return strcmp( $a->page_title, $b->page_title );
 817                 } else {
 818                         return $a->page_namespace - $b->page_namespace;
 819                 }
 820         }
 821 }
 822
 823 /**
 824  * Builds the image revision log shown on image pages
 825  *
 826  * @ingroup Media
 827  */
 828 class ImageHistoryList {
 829
 830         protected $imagePage, $img, $skin, $title, $repo, $showThumb;
 831
 832         public function __construct( $imagePage ) {
 833                 global $wgUser, $wgShowArchiveThumbnails;
 834                 $this->skin = $wgUser->getSkin();
 835                 $this->current = $imagePage->getFile();
 836                 $this->img = $imagePage->getDisplayedFile();
 837                 $this->title = $imagePage->getTitle();
 838                 $this->imagePage = $imagePage;
 839                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 840         }
 841
 842         public function getImagePage() {
 843                 return $this->imagePage;
 844         }
 845
 846         public function getSkin() {
 847                 return $this->skin;
 848         }
 849
 850         public function getFile() {
 851                 return $this->img;
 852         }
 853
 854         public function beginImageHistoryList( $navLinks = '' ) {
 855                 global $wgOut, $wgUser;
 856                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 857                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 858                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 859                         . $navLinks . "\n"
 860                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 861                         . '<tr><td></td>'
 862                         . ( $this->current->isLocal() && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ? '<td></td>' : '' )
 863                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 864                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 865                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 866                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 867                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 868                         . "</tr>\n";
 869         }
 870
 871         public function endImageHistoryList( $navLinks = '' ) {
 872                 return "</table>\n$navLinks\n</div>\n";
 873         }
 874
 875         public function imageHistoryLine( $iscur, $file ) {
 876                 global $wgUser, $wgLang;
 877
 878                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 879                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 880                 $user = $file->getUser( 'id' );
 881                 $usertext = $file->getUser( 'text' );
 882                 $description = $file->getDescription();
 883
 884                 $local = $this->current->isLocal();
 885                 $row = $selected = '';
 886
 887                 // Deletion link
 888                 if ( $local && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ) {
 889                         $row .= '<td>';
 890                         # Link to remove from history
 891                         if ( $wgUser->isAllowed( 'delete' ) ) {
 892                                 $q = array( 'action' => 'delete' );
 893                                 if ( !$iscur )
 894                                         $q['oldimage'] = $img;
 895                                 $row .= $this->skin->link(
 896                                         $this->title,
 897                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 898                                         array(), $q, array( 'known' )
 899                                 );
 900                         }
 901                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 902                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 903                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 904                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 905                                         $row .= '<br />';
 906                                 }
 907                                 // If file is top revision or locked from this user, don't link
 908                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 909                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 910                                 } else {
 911                                         list( $ts, $name ) = explode( '!', $img, 2 );
 912                                         $query = array(
 913                                                 'type'   => 'oldimage',
 914                                                 'target' => $this->title->getPrefixedText(),
 915                                                 'ids'    => $ts,
 916                                         );
 917                                         $del = $this->skin->revDeleteLink( $query,
 918                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 919                                 }
 920                                 $row .= $del;
 921                         }
 922                         $row .= '</td>';
 923                 }
 924
 925                 // Reversion link/current indicator
 926                 $row .= '<td>';
 927                 if ( $iscur ) {
 928                         $row .= wfMsgHtml( 'filehist-current' );
 929                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 930                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 931                                 $row .= wfMsgHtml( 'filehist-revert' );
 932                         } else {
 933                                 $row .= $this->skin->link(
 934                                         $this->title,
 935                                         wfMsgHtml( 'filehist-revert' ),
 936                                         array(),
 937                                         array(
 938                                                 'action' => 'revert',
 939                                                 'oldimage' => $img,
 940                                                 'wpEditToken' => $wgUser->editToken( $img )
 941                                         ),
 942                                         array( 'known', 'noclasses' )
 943                                 );
 944                         }
 945                 }
 946                 $row .= '</td>';
 947
 948                 // Date/time and image link
 949                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
 950                         $selected = "class='filehistory-selected'";
 951                 }
 952                 $row .= "<td $selected style='white-space: nowrap;'>";
 953                 if ( !$file->userCan( File::DELETED_FILE ) ) {
 954                         # Don't link to unviewable files
 955                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 956                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
 957                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 958                         # Make a link to review the image
 959                         $url = $this->skin->link(
 960                                 $revdel,
 961                                 $wgLang->timeAndDate( $timestamp, true ),
 962                                 array(),
 963                                 array(
 964                                         'target' => $this->title->getPrefixedText(),
 965                                         'file' => $img,
 966                                         'token' => $wgUser->editToken( $img )
 967                                 ),
 968                                 array( 'known', 'noclasses' )
 969                         );
 970                         $row .= '<span class="history-deleted">' . $url . '</span>';
 971                 } else {
 972                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 973                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 974                 }
 975                 $row .= "</td>";
 976
 977                 // Thumbnail
 978                 if ( $this->showThumb ) {
 979                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
 980                 }
 981
 982                 // Image dimensions + size
 983                 $row .= '<td>';
 984                 $row .= htmlspecialchars( $file->getDimensionsString() );
 985                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $file->getSize() ) . ')</span>';
 986                 $row .= '</td>';
 987
 988                 // Uploading user
 989                 $row .= '<td>';
 990                 if ( $local ) {
 991                         // Hide deleted usernames
 992                         if ( $file->isDeleted( File::DELETED_USER ) ) {
 993                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 994                         } else {
 995                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 996                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 997                         }
 998                 } else {
 999                         $row .= htmlspecialchars( $usertext );
1000                 }
1001                 $row .= '</td><td>';
1002
1003                 // Don't show deleted descriptions
1004                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1005                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
1006                 } else {
1007                         $row .= $this->skin->commentBlock( $description, $this->title );
1008                 }
1009                 $row .= '</td>';
1010
1011                 $rowClass = null;
1012                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1013                 $classAttr = $rowClass ? " class='$rowClass'" : "";
1014
1015                 return "<tr{$classAttr}>{$row}</tr>\n";
1016         }
1017
1018         protected function getThumbForLine( $file ) {
1019                 global $wgLang;
1020
1021                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1022                         $params = array(
1023                                 'width' => '120',
1024                                 'height' => '120',
1025                         );
1026                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1027
1028                         $thumbnail = $file->transform( $params );
1029                         $options = array(
1030                                 'alt' => wfMsg( 'filehist-thumbtext',
1031                                         $wgLang->timeAndDate( $timestamp, true ),
1032                                         $wgLang->date( $timestamp, true ),
1033                                         $wgLang->time( $timestamp, true ) ),
1034                                 'file-link' => true,
1035                         );
1036
1037                         if ( !$thumbnail ) return wfMsgHtml( 'filehist-nothumb' );
1038
1039                         return $thumbnail->toHtml( $options );
1040                 } else {
1041                         return wfMsgHtml( 'filehist-nothumb' );
1042                 }
1043         }
1044 }
1045
1046 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1047         function __construct( $imagePage ) {
1048                 parent::__construct();
1049                 $this->mImagePage = $imagePage;
1050                 $this->mTitle = clone ( $imagePage->getTitle() );
1051                 $this->mTitle->setFragment( '#filehistory' );
1052                 $this->mImg = null;
1053                 $this->mHist = array();
1054                 $this->mRange = array( 0, 0 ); // display range
1055         }
1056
1057         function getTitle() {
1058                 return $this->mTitle;
1059         }
1060
1061         function getQueryInfo() {
1062                 return false;
1063         }
1064
1065         function getIndexField() {
1066                 return '';
1067         }
1068
1069         function formatRow( $row ) {
1070                 return '';
1071         }
1072
1073         function getBody() {
1074                 $s = '';
1075                 $this->doQuery();
1076                 if ( count( $this->mHist ) ) {
1077                         $list = new ImageHistoryList( $this->mImagePage );
1078                         # Generate prev/next links
1079                         $navLink = $this->getNavigationBar();
1080                         $s = $list->beginImageHistoryList( $navLink );
1081                         // Skip rows there just for paging links
1082                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1083                                 $file = $this->mHist[$i];
1084                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1085                         }
1086                         $s .= $list->endImageHistoryList( $navLink );
1087                 }
1088                 return $s;
1089         }
1090
1091         function doQuery() {
1092                 if ( $this->mQueryDone ) return;
1093                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1094                 if ( !$this->mImg->exists() ) {
1095                         return;
1096                 }
1097                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1098                 if ( $this->mIsBackwards ) {
1099                         // Fetch the file history
1100                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1101                         // The current rev may not meet the offset/limit
1102                         $numRows = count( $this->mHist );
1103                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1104                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1105                         }
1106                 } else {
1107                         // The current rev may not meet the offset
1108                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1109                                 $this->mHist[] = $this->mImg;
1110                         }
1111                         // Old image versions (fetch extra row for nav links)
1112                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1113                         // Fetch the file history
1114                         $this->mHist = array_merge( $this->mHist,
1115                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1116                 }
1117                 $numRows = count( $this->mHist ); // Total number of query results
1118                 if ( $numRows ) {
1119                         # Index value of top item in the list
1120                         $firstIndex = $this->mIsBackwards ?
1121                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1122                         # Discard the extra result row if there is one
1123                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1124                                 if ( $this->mIsBackwards ) {
1125                                         # Index value of item past the index
1126                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1127                                         # Index value of bottom item in the list
1128                                         $lastIndex = $this->mHist[1]->getTimestamp();
1129                                         # Display range
1130                                         $this->mRange = array( 1, $numRows - 1 );
1131                                 } else {
1132                                         # Index value of item past the index
1133                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1134                                         # Index value of bottom item in the list
1135                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1136                                         # Display range
1137                                         $this->mRange = array( 0, $numRows - 2 );
1138                                 }
1139                         } else {
1140                                 # Setting indexes to an empty string means that they will be
1141                                 # omitted if they would otherwise appear in URLs. It just so
1142                                 # happens that this  is the right thing to do in the standard
1143                                 # UI, in all the relevant cases.
1144                                 $this->mPastTheEndIndex = '';
1145                                 # Index value of bottom item in the list
1146                                 $lastIndex = $this->mIsBackwards ?
1147                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1148                                 # Display range
1149                                 $this->mRange = array( 0, $numRows - 1 );
1150                         }
1151                 } else {
1152                         $firstIndex = '';
1153                         $lastIndex = '';
1154                         $this->mPastTheEndIndex = '';
1155                 }
1156                 if ( $this->mIsBackwards ) {
1157                         $this->mIsFirst = ( $numRows < $queryLimit );
1158                         $this->mIsLast = ( $this->mOffset == '' );
1159                         $this->mLastShown = $firstIndex;
1160                         $this->mFirstShown = $lastIndex;
1161                 } else {
1162                         $this->mIsFirst = ( $this->mOffset == '' );
1163                         $this->mIsLast = ( $numRows < $queryLimit );
1164                         $this->mLastShown = $lastIndex;
1165                         $this->mFirstShown = $firstIndex;
1166                 }
1167                 $this->mQueryDone = true;
1168         }
1169 }