includes/ImagePage.php

   1 <?php
   2
   3 if ( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 /**
   7  * Special handling for image description pages
   8  *
   9  * @ingroup Media
  10  */
  11 class ImagePage extends Article {
  12
  13         /* private */ var $img;  // Image object
  14         /* private */ var $displayImg;
  15         /* private */ var $repo;
  16         /* private */ var $fileLoaded;
  17         var $mExtraDescription = false;
  18         var $dupes;
  19
  20         function __construct( $title ) {
  21                 parent::__construct( $title );
  22                 $this->dupes = null;
  23                 $this->repo = null;
  24         }
  25
  26         public function setFile( $file ) {
  27                 $this->displayImg = $file;
  28                 $this->img = $file;
  29                 $this->fileLoaded = true;
  30         }
  31
  32         protected function loadFile() {
  33                 if ( $this->fileLoaded ) {
  34                         return true;
  35                 }
  36                 $this->fileLoaded = true;
  37
  38                 $this->displayImg = $this->img = false;
  39                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  40                 if ( !$this->img ) {
  41                         $this->img = wfFindFile( $this->mTitle );
  42                         if ( !$this->img ) {
  43                                 $this->img = wfLocalFile( $this->mTitle );
  44                         }
  45                 }
  46                 if ( !$this->displayImg ) {
  47                         $this->displayImg = $this->img;
  48                 }
  49                 $this->repo = $this->img->getRepo();
  50         }
  51
  52         /**
  53          * Handler for action=render
  54          * Include body text only; none of the image extras
  55          */
  56         public function render() {
  57                 global $wgOut;
  58                 $wgOut->setArticleBodyOnly( true );
  59                 parent::view();
  60         }
  61
  62         public function view() {
  63                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  64
  65                 $diff = $wgRequest->getVal( 'diff' );
  66                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  67
  68                 if ( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  69                         return parent::view();
  70                 }
  71
  72                 $this->loadFile();
  73
  74                 if ( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  75                         if ( $this->mTitle->getDBkey() == $this->img->getName() || isset( $diff ) ) {
  76                                 // mTitle is the same as the redirect target so ask Article
  77                                 // to perform the redirect for us.
  78                                 $wgRequest->setVal( 'diffonly', 'true' );
  79                                 return parent::view();
  80                         } else {
  81                                 // mTitle is not the same as the redirect target so it is
  82                                 // probably the redirect page itself. Fake the redirect symbol
  83                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  84                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  85                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  86                                 $this->viewUpdates();
  87                                 return;
  88                         }
  89                 }
  90
  91                 $this->showRedirectedFromHeader();
  92
  93                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
  94                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  95                         $formattedMetadata = $this->displayImg->formatMetadata();
  96                         $showmeta = $formattedMetadata !== false;
  97                 } else {
  98                         $showmeta = false;
  99                 }
 100
 101                 if ( !$diff && $this->displayImg->exists() )
 102                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 103
 104                 if ( !$diff )
 105                         $this->openShowImage();
 106
 107                 # No need to display noarticletext, we use our own message, output in openShowImage()
 108                 if ( $this->getID() ) {
 109                         parent::view();
 110                 } else {
 111                         # Just need to set the right headers
 112                         $wgOut->setArticleFlag( true );
 113                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 114                         $this->viewUpdates();
 115                 }
 116
 117                 # Show shared description, if needed
 118                 if ( $this->mExtraDescription ) {
 119                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
 120                         if ( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
 121                                 $wgOut->addWikiText( $fol );
 122                         }
 123                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 124                 }
 125
 126                 $this->closeShowImage();
 127                 $this->imageHistory();
 128                 // TODO: Cleanup the following
 129
 130                 $wgOut->addHTML( Xml::element( 'h2',
 131                         array( 'id' => 'filelinks' ),
 132                         wfMsg( 'imagelinks' ) ) . "\n" );
 133                 $this->imageDupes();
 134                 # TODO! FIXME! For some freaky reason, we can't redirect to foreign images.
 135                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 136                 $this->imageRedirects();
 137                 $this->imageLinks();
 138
 139                 # Allow extensions to add something after the image links
 140                 $html = '';
 141                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 142                 if ( $html )
 143                         $wgOut->addHTML( $html );
 144
 145                 if ( $showmeta ) {
 146                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 147                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 148                         $wgOut->addModules( array( 'mediawiki.legacy.metadata' ) );
 149                 }
 150
 151                 $css = $this->repo->getDescriptionStylesheetUrl();
 152                 if ( $css ) {
 153                         $wgOut->addStyle( $css );
 154                 }
 155         }
 156
 157         public function getRedirectTarget() {
 158                 $this->loadFile();
 159                 if ( $this->img->isLocal() ) {
 160                         return parent::getRedirectTarget();
 161                 }
 162                 // Foreign image page
 163                 $from = $this->img->getRedirected();
 164                 $to = $this->img->getName();
 165                 if ( $from == $to ) {
 166                         return null;
 167                 }
 168                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 169         }
 170         public function followRedirect() {
 171                 $this->loadFile();
 172                 if ( $this->img->isLocal() ) {
 173                         return parent::followRedirect();
 174                 }
 175                 $from = $this->img->getRedirected();
 176                 $to = $this->img->getName();
 177                 if ( $from == $to ) {
 178                         return false;
 179                 }
 180                 return Title::makeTitle( NS_FILE, $to );
 181         }
 182         public function isRedirect( $text = false ) {
 183                 $this->loadFile();
 184                 if ( $this->img->isLocal() )
 185                         return parent::isRedirect( $text );
 186
 187                 return (bool)$this->img->getRedirected();
 188         }
 189
 190         public function isLocal() {
 191                 $this->loadFile();
 192                 return $this->img->isLocal();
 193         }
 194
 195         public function getFile() {
 196                 $this->loadFile();
 197                 return $this->img;
 198         }
 199
 200         public function getDisplayedFile() {
 201                 $this->loadFile();
 202                 return $this->displayImg;
 203         }
 204
 205         public function getDuplicates() {
 206                 $this->loadFile();
 207                 if ( !is_null( $this->dupes ) ) {
 208                         return $this->dupes;
 209                 }
 210                 if ( !( $hash = $this->img->getSha1() ) ) {
 211                         return $this->dupes = array();
 212                 }
 213                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 214                 // Remove duplicates with self and non matching file sizes
 215                 $self = $this->img->getRepoName() . ':' . $this->img->getName();
 216                 $size = $this->img->getSize();
 217                 foreach ( $dupes as $index => $file ) {
 218                         $key = $file->getRepoName() . ':' . $file->getName();
 219                         if ( $key == $self )
 220                                 unset( $dupes[$index] );
 221                         if ( $file->getSize() != $size )
 222                                 unset( $dupes[$index] );
 223                 }
 224                 return $this->dupes = $dupes;
 225
 226         }
 227
 228
 229         /**
 230          * Create the TOC
 231          *
 232          * @param $metadata Boolean: whether or not to show the metadata link
 233          * @return String
 234          */
 235         protected function showTOC( $metadata ) {
 236                 $r = array(
 237                                 '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 238                                 '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 239                                 '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 240                 );
 241                 if ( $metadata ) {
 242                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 243                 }
 244
 245                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 246
 247                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 248         }
 249
 250         /**
 251          * Make a table with metadata to be shown in the output page.
 252          *
 253          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 254          *
 255          * @param $metadata Array: the array containing the EXIF data
 256          * @return String
 257          */
 258         protected function makeMetadataTable( $metadata ) {
 259                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 260                 $r .= wfMsgNoTrans( 'metadata-help' );
 261                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 262                 foreach ( $metadata as $type => $stuff ) {
 263                         foreach ( $stuff as $v ) {
 264                                 # FIXME, why is this using escapeId for a class?!
 265                                 $class = Sanitizer::escapeId( $v['id'] );
 266                                 if ( $type == 'collapsed' ) {
 267                                         $class .= ' collapsable';
 268                                 }
 269                                 $r .= "<tr class=\"$class\">\n";
 270                                 $r .= "<th>{$v['name']}</th>\n";
 271                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 272                         }
 273                 }
 274                 $r .= "</table>\n</div>\n";
 275                 return $r;
 276         }
 277
 278         /**
 279          * Overloading Article's getContent method.
 280          *
 281          * Omit noarticletext if sharedupload; text will be fetched from the
 282          * shared upload server if possible.
 283          */
 284         public function getContent() {
 285                 $this->loadFile();
 286                 if ( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 287                         return '';
 288                 }
 289                 return Article::getContent();
 290         }
 291
 292         protected function openShowImage() {
 293                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 294                         $wgLang, $wgContLang, $wgEnableUploads;
 295
 296                 $this->loadFile();
 297
 298                 $full_url  = $this->displayImg->getURL();
 299                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 300                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 301                         $sizeSel = User::getDefaultOption( 'imagesize' );
 302
 303                         // The user offset might still be incorrect, specially if
 304                         // $wgImageLimits got changed (see bug #8858).
 305                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 306                                 // Default to the first offset in $wgImageLimits
 307                                 $sizeSel = 0;
 308                         }
 309                 }
 310                 $max = $wgImageLimits[$sizeSel];
 311                 $maxWidth = $max[0];
 312                 $maxHeight = $max[1];
 313                 $sk = $wgUser->getSkin();
 314                 $dirmark = $wgContLang->getDirMark();
 315
 316                 if ( $this->displayImg->exists() ) {
 317                         # image
 318                         $page = $wgRequest->getIntOrNull( 'page' );
 319                         if ( is_null( $page ) ) {
 320                                 $params = array();
 321                                 $page = 1;
 322                         } else {
 323                                 $params = array( 'page' => $page );
 324                         }
 325                         $width_orig = $this->displayImg->getWidth( $page );
 326                         $width = $width_orig;
 327                         $height_orig = $this->displayImg->getHeight( $page );
 328                         $height = $height_orig;
 329
 330                         $longDesc = $this->displayImg->getLongDesc();
 331
 332                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 333
 334                         if ( $this->displayImg->allowInlineDisplay() ) {
 335                                 # image
 336
 337                                 # "Download high res version" link below the image
 338                                 # $msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 339                                 # We'll show a thumbnail of this image
 340                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 341                                         # Calculate the thumbnail size.
 342                                         # First case, the limiting factor is the width, not the height.
 343                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 344                                                 $height = round( $height * $maxWidth / $width );
 345                                                 $width = $maxWidth;
 346                                                 # Note that $height <= $maxHeight now.
 347                                         } else {
 348                                                 $newwidth = floor( $width * $maxHeight / $height );
 349                                                 $height = round( $height * $newwidth / $width );
 350                                                 $width = $newwidth;
 351                                                 # Note that $height <= $maxHeight now, but might not be identical
 352                                                 # because of rounding.
 353                                         }
 354                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 355                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 356                                                 $wgLang->formatNum( $width ),
 357                                                 $wgLang->formatNum( $height )
 358                                         );
 359                                 } else {
 360                                         # Image is small enough to show full size on image page
 361                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 362                                 }
 363
 364                                 $params['width'] = $width;
 365                                 $thumbnail = $this->displayImg->transform( $params );
 366
 367                                 $showLink = true;
 368                                 $anchorclose = '';
 369                                 if ( !$this->displayImg->mustRender() ) {
 370                                         $anchorclose = "<br />" . $msgsmall;
 371                                 }
 372
 373                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 374                                 if ( $isMulti ) {
 375                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 376                                 }
 377
 378                                 if ( $thumbnail ) {
 379                                         $options = array(
 380                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 381                                                 'file-link' => true,
 382                                         );
 383                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 384                                                 $thumbnail->toHtml( $options ) .
 385                                                 $anchorclose . "</div>\n" );
 386                                 }
 387
 388                                 if ( $isMulti ) {
 389                                         $count = $this->displayImg->pageCount();
 390
 391                                         if ( $page > 1 ) {
 392                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 393                                                 $link = $sk->link(
 394                                                         $this->mTitle,
 395                                                         $label,
 396                                                         array(),
 397                                                         array( 'page' => $page - 1 ),
 398                                                         array( 'known', 'noclasses' )
 399                                                 );
 400                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 401                                                         array( 'page' => $page - 1 ) );
 402                                         } else {
 403                                                 $thumb1 = '';
 404                                         }
 405
 406                                         if ( $page < $count ) {
 407                                                 $label = wfMsg( 'imgmultipagenext' );
 408                                                 $link = $sk->link(
 409                                                         $this->mTitle,
 410                                                         $label,
 411                                                         array(),
 412                                                         array( 'page' => $page + 1 ),
 413                                                         array( 'known', 'noclasses' )
 414                                                 );
 415                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 416                                                         array( 'page' => $page + 1 ) );
 417                                         } else {
 418                                                 $thumb2 = '';
 419                                         }
 420
 421                                         global $wgScript;
 422
 423                                         $formParams = array(
 424                                                 'name' => 'pageselector',
 425                                                 'action' => $wgScript,
 426                                                 'onchange' => 'document.pageselector.submit();',
 427                                         );
 428
 429                                         for ( $i = 1; $i <= $count; $i++ ) {
 430                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 431                                         }
 432                                         $select = Xml::tags( 'select',
 433                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 434                                                 implode( "\n", $options ) );
 435
 436                                         $wgOut->addHTML(
 437                                                 '</td><td><div class="multipageimagenavbox">' .
 438                                                 Xml::openElement( 'form', $formParams ) .
 439                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 440                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 441                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 442                                                 Xml::closeElement( 'form' ) .
 443                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 444                                         );
 445                                 }
 446                         } else {
 447                                 # if direct link is allowed but it's not a renderable image, show an icon.
 448                                 if ( $this->displayImg->isSafeFile() ) {
 449                                         $icon = $this->displayImg->iconThumb();
 450
 451                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 452                                         $icon->toHtml( array( 'file-link' => true ) ) .
 453                                         "</div>\n" );
 454                                 }
 455
 456                                 $showLink = true;
 457                         }
 458
 459
 460                         if ( $showLink ) {
 461                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 462                                 $linktext = $filename;
 463                                 if ( isset( $msgbig ) ) {
 464                                         $linktext = wfEscapeWikiText( $msgbig );
 465                                 }
 466                                 $medialink = "[[Media:$filename|$linktext]]";
 467
 468                                 if ( !$this->displayImg->isSafeFile() ) {
 469                                         $warning = wfMsgNoTrans( 'mediawarning' );
 470                                         $wgOut->addWikiText( <<<EOT
 471 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 472 <div class="mediaWarning">$warning</div>
 473 EOT
 474                                                 );
 475                                 } else {
 476                                         $wgOut->addWikiText( <<<EOT
 477 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 478 </div>
 479 EOT
 480                                         );
 481                                 }
 482                         }
 483
 484                         if ( !$this->displayImg->isLocal() ) {
 485                                 $this->printSharedImageText();
 486                         }
 487                 } else {
 488                         # Image does not exist
 489                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 490                                 // Only show an upload link if the user can upload
 491                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 492                                 $nofile = array(
 493                                         'filepage-nofile-link',
 494                                         $uploadTitle->getFullUrl( array( 'wpDestFile' => $this->img->getName() ) )
 495                                 );
 496                         }
 497                         else
 498                         {
 499                                 $nofile = 'filepage-nofile';
 500                         }
 501                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 502                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 503                 }
 504         }
 505
 506         /**
 507          * Show a notice that the file is from a shared repository
 508          */
 509         protected function printSharedImageText() {
 510                 global $wgOut;
 511
 512                 $this->loadFile();
 513
 514                 $descUrl = $this->img->getDescriptionUrl();
 515                 $descText = $this->img->getDescriptionText();
 516
 517                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 518                 $repo = $this->img->getRepo()->getDisplayName();
 519
 520                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 521                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 522                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 523                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 524                 } else {
 525                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 526                 }
 527
 528                 if ( $descText ) {
 529                         $this->mExtraDescription = $descText;
 530                 }
 531         }
 532
 533         public function getUploadUrl() {
 534                 $this->loadFile();
 535                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 536                 return $uploadTitle->getFullUrl( array(
 537                         'wpDestFile' => $this->img->getName(),
 538                         'wpForReUpload' => 1
 539                  ) );
 540         }
 541
 542         /**
 543          * Print out the various links at the bottom of the image page, e.g. reupload,
 544          * external editing (and instructions link) etc.
 545          */
 546         protected function uploadLinksBox() {
 547                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 548
 549                 if ( !$wgEnableUploads ) { return; }
 550
 551                 $this->loadFile();
 552                 if ( !$this->img->isLocal() )
 553                         return;
 554
 555                 $sk = $wgUser->getSkin();
 556
 557                 $wgOut->addHTML( "<br /><ul>\n" );
 558
 559                 # "Upload a new version of this file" link
 560                 if ( UploadBase::userCanReUpload( $wgUser, $this->img->name ) ) {
 561                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 562                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 563                 }
 564
 565                 # External editing link
 566                 if ( $wgUseExternalEditor ) {
 567                         $elink = $sk->link(
 568                                 $this->mTitle,
 569                                 wfMsgHtml( 'edit-externally' ),
 570                                 array(),
 571                                 array(
 572                                         'action' => 'edit',
 573                                         'externaledit' => 'true',
 574                                         'mode' => 'file'
 575                                 ),
 576                                 array( 'known', 'noclasses' )
 577                         );
 578                         $wgOut->addHTML( '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . "</small></li>\n" );
 579                 }
 580
 581                 $wgOut->addHTML( "</ul>\n" );
 582         }
 583
 584         protected function closeShowImage() { } # For overloading
 585
 586         /**
 587          * If the page we've just displayed is in the "Image" namespace,
 588          * we follow it with an upload history of the image and its usage.
 589          */
 590         protected function imageHistory() {
 591                 global $wgOut;
 592
 593                 $this->loadFile();
 594                 $pager = new ImageHistoryPseudoPager( $this );
 595                 $wgOut->addHTML( $pager->getBody() );
 596
 597                 $this->img->resetHistory(); // free db resources
 598
 599                 # Exist check because we don't want to show this on pages where an image
 600                 # doesn't exist along with the noimage message, that would suck. -ævar
 601                 if ( $this->img->exists() ) {
 602                         $this->uploadLinksBox();
 603                 }
 604         }
 605
 606         protected function imageLinks() {
 607                 global $wgUser, $wgOut, $wgLang;
 608
 609                 $limit = 100;
 610
 611                 $dbr = wfGetDB( DB_SLAVE );
 612
 613                 $res = $dbr->select(
 614                         array( 'imagelinks', 'page' ),
 615                         array( 'page_namespace', 'page_title' ),
 616                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 617                         __METHOD__,
 618                         array( 'LIMIT' => $limit + 1 )
 619                 );
 620                 $count = $dbr->numRows( $res );
 621                 if ( $count == 0 ) {
 622                         $wgOut->wrapWikiMsg( Html::rawElement( 'div', array ( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ), 'nolinkstoimage' );
 623                         return;
 624                 }
 625
 626                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 627                 if ( $count <= $limit - 1 ) {
 628                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 629                 } else {
 630                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 631                         $wgOut->addWikiMsg( 'linkstoimage-more',
 632                                 $wgLang->formatNum( $limit ),
 633                                 $this->mTitle->getPrefixedDBkey()
 634                         );
 635                 }
 636
 637                 $wgOut->addHTML( Html::openElement( 'ul', array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n" );
 638                 $sk = $wgUser->getSkin();
 639                 $count = 0;
 640                 $elements = array();
 641                 foreach ( $res as $s ) {
 642                         $count++;
 643                         if ( $count <= $limit ) {
 644                                 // We have not yet reached the extra one that tells us there is more to fetch
 645                                 $elements[] =  $s;
 646                         }
 647                 }
 648
 649                 // Sort the list by namespace:title
 650                 usort ( $elements, array( $this, 'compare' ) );
 651
 652                 // Create links for every element
 653                 foreach( $elements as $element ) {
 654                         $link = $sk->linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 655                         $wgOut->addHTML( Html::rawElement(
 656                                                 'li',
 657                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 658                                                 $link
 659                                         ) . "\n"
 660                         );
 661
 662                 };
 663                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 664                 $res->free();
 665
 666                 // Add a links to [[Special:Whatlinkshere]]
 667                 if ( $count > $limit ) {
 668                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 669                 }
 670                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 671         }
 672
 673         protected function imageRedirects() {
 674                 global $wgUser, $wgOut, $wgLang;
 675
 676                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 677                 if ( count( $redirects ) == 0 ) return;
 678
 679                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 680                 $wgOut->addWikiMsg( 'redirectstofile',
 681                         $wgLang->formatNum( count( $redirects ) )
 682                 );
 683                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 684
 685                 $sk = $wgUser->getSkin();
 686                 foreach ( $redirects as $title ) {
 687                         $link = $sk->link(
 688                                 $title,
 689                                 null,
 690                                 array(),
 691                                 array( 'redirect' => 'no' ),
 692                                 array( 'known', 'noclasses' )
 693                         );
 694                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 695                 }
 696                 $wgOut->addHTML( "</ul></div>\n" );
 697
 698         }
 699
 700         protected function imageDupes() {
 701                 global $wgOut, $wgUser, $wgLang;
 702
 703                 $this->loadFile();
 704
 705                 $dupes = $this->getDuplicates();
 706                 if ( count( $dupes ) == 0 ) return;
 707
 708                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 709                 $wgOut->addWikiMsg( 'duplicatesoffile',
 710                         $wgLang->formatNum( count( $dupes ) ), $this->mTitle->getDBkey()
 711                 );
 712                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 713
 714                 $sk = $wgUser->getSkin();
 715                 foreach ( $dupes as $file ) {
 716                         $fromSrc = '';
 717                         if ( $file->isLocal() ) {
 718                                 $link = $sk->link(
 719                                         $file->getTitle(),
 720                                         null,
 721                                         array(),
 722                                         array(),
 723                                         array( 'known', 'noclasses' )
 724                                 );
 725                         } else {
 726                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 727                                         $file->getTitle()->getPrefixedText() );
 728                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 729                         }
 730                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 731                 }
 732                 $wgOut->addHTML( "</ul></div>\n" );
 733         }
 734
 735         /**
 736          * Delete the file, or an earlier version of it
 737          */
 738         public function delete() {
 739                 global $wgUploadMaintenance;
 740                 if ( $wgUploadMaintenance && $this->mTitle && $this->mTitle->getNamespace() == NS_FILE ) {
 741                         global $wgOut;
 742                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 743                         return;
 744                 }
 745
 746                 $this->loadFile();
 747                 if ( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 748                         // Standard article deletion
 749                         parent::delete();
 750                         return;
 751                 }
 752                 $deleter = new FileDeleteForm( $this->img );
 753                 $deleter->execute();
 754         }
 755
 756         /**
 757          * Revert the file to an earlier version
 758          */
 759         public function revert() {
 760                 $this->loadFile();
 761                 $reverter = new FileRevertForm( $this->img );
 762                 $reverter->execute();
 763         }
 764
 765         /**
 766          * Override handling of action=purge
 767          */
 768         public function doPurge() {
 769                 $this->loadFile();
 770                 if ( $this->img->exists() ) {
 771                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 772                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 773                         $update->doUpdate();
 774                         $this->img->upgradeRow();
 775                         $this->img->purgeCache();
 776                 } else {
 777                         wfDebug( "ImagePage::doPurge no image for " . $this->img->getName() . "; limiting purge to cache only\n" );
 778                         // even if the file supposedly doesn't exist, force any cached information
 779                         // to be updated (in case the cached information is wrong)
 780                         $this->img->purgeCache();
 781                 }
 782                 parent::doPurge();
 783         }
 784
 785         /**
 786          * Display an error with a wikitext description
 787          */
 788         function showError( $description ) {
 789                 global $wgOut;
 790                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 791                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 792                 $wgOut->setArticleRelated( false );
 793                 $wgOut->enableClientCache( false );
 794                 $wgOut->addWikiText( $description );
 795         }
 796
 797
 798         /**
 799          * Callback for usort() to do link sorts by (namespace, title)
 800          * Function copied from Title::compare()
 801          *
 802          * @param $a object page to compare with
 803          * @param $b object page to compare with
 804          * @return Integer: result of string comparison, or namespace comparison
 805          */
 806         protected function compare( $a, $b ) {
 807                 if ( $a->page_namespace == $b->page_namespace ) {
 808                         return strcmp( $a->page_title, $b->page_title );
 809                 } else {
 810                         return $a->page_namespace - $b->page_namespace;
 811                 }
 812         }
 813 }
 814
 815 /**
 816  * Builds the image revision log shown on image pages
 817  *
 818  * @ingroup Media
 819  */
 820 class ImageHistoryList {
 821
 822         protected $imagePage, $img, $skin, $title, $repo, $showThumb;
 823
 824         public function __construct( $imagePage ) {
 825                 global $wgUser, $wgShowArchiveThumbnails;
 826                 $this->skin = $wgUser->getSkin();
 827                 $this->current = $imagePage->getFile();
 828                 $this->img = $imagePage->getDisplayedFile();
 829                 $this->title = $imagePage->getTitle();
 830                 $this->imagePage = $imagePage;
 831                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 832         }
 833
 834         public function getImagePage() {
 835                 return $this->imagePage;
 836         }
 837
 838         public function getSkin() {
 839                 return $this->skin;
 840         }
 841
 842         public function getFile() {
 843                 return $this->img;
 844         }
 845
 846         public function beginImageHistoryList( $navLinks = '' ) {
 847                 global $wgOut, $wgUser;
 848                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 849                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 850                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 851                         . $navLinks . "\n"
 852                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 853                         . '<tr><td></td>'
 854                         . ( $this->current->isLocal() && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ? '<td></td>' : '' )
 855                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 856                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 857                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 858                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 859                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 860                         . "</tr>\n";
 861         }
 862
 863         public function endImageHistoryList( $navLinks = '' ) {
 864                 return "</table>\n$navLinks\n</div>\n";
 865         }
 866
 867         public function imageHistoryLine( $iscur, $file ) {
 868                 global $wgUser, $wgLang;
 869
 870                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 871                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 872                 $user = $file->getUser( 'id' );
 873                 $usertext = $file->getUser( 'text' );
 874                 $description = $file->getDescription();
 875
 876                 $local = $this->current->isLocal();
 877                 $row = $selected = '';
 878
 879                 // Deletion link
 880                 if ( $local && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ) {
 881                         $row .= '<td>';
 882                         # Link to remove from history
 883                         if ( $wgUser->isAllowed( 'delete' ) ) {
 884                                 $q = array( 'action' => 'delete' );
 885                                 if ( !$iscur )
 886                                         $q['oldimage'] = $img;
 887                                 $row .= $this->skin->link(
 888                                         $this->title,
 889                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 890                                         array(), $q, array( 'known' )
 891                                 );
 892                         }
 893                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 894                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 895                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 896                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 897                                         $row .= '<br />';
 898                                 }
 899                                 // If file is top revision or locked from this user, don't link
 900                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 901                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 902                                 } else {
 903                                         list( $ts, $name ) = explode( '!', $img, 2 );
 904                                         $query = array(
 905                                                 'type'   => 'oldimage',
 906                                                 'target' => $this->title->getPrefixedText(),
 907                                                 'ids'    => $ts,
 908                                         );
 909                                         $del = $this->skin->revDeleteLink( $query,
 910                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 911                                 }
 912                                 $row .= $del;
 913                         }
 914                         $row .= '</td>';
 915                 }
 916
 917                 // Reversion link/current indicator
 918                 $row .= '<td>';
 919                 if ( $iscur ) {
 920                         $row .= wfMsgHtml( 'filehist-current' );
 921                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 922                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 923                                 $row .= wfMsgHtml( 'filehist-revert' );
 924                         } else {
 925                                 $row .= $this->skin->link(
 926                                         $this->title,
 927                                         wfMsgHtml( 'filehist-revert' ),
 928                                         array(),
 929                                         array(
 930                                                 'action' => 'revert',
 931                                                 'oldimage' => $img,
 932                                                 'wpEditToken' => $wgUser->editToken( $img )
 933                                         ),
 934                                         array( 'known', 'noclasses' )
 935                                 );
 936                         }
 937                 }
 938                 $row .= '</td>';
 939
 940                 // Date/time and image link
 941                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
 942                         $selected = "class='filehistory-selected'";
 943                 }
 944                 $row .= "<td $selected style='white-space: nowrap;'>";
 945                 if ( !$file->userCan( File::DELETED_FILE ) ) {
 946                         # Don't link to unviewable files
 947                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 948                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
 949                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 950                         # Make a link to review the image
 951                         $url = $this->skin->link(
 952                                 $revdel,
 953                                 $wgLang->timeAndDate( $timestamp, true ),
 954                                 array(),
 955                                 array(
 956                                         'target' => $this->title->getPrefixedText(),
 957                                         'file' => $img,
 958                                         'token' => $wgUser->editToken( $img )
 959                                 ),
 960                                 array( 'known', 'noclasses' )
 961                         );
 962                         $row .= '<span class="history-deleted">' . $url . '</span>';
 963                 } else {
 964                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 965                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 966                 }
 967                 $row .= "</td>";
 968
 969                 // Thumbnail
 970                 if ( $this->showThumb ) {
 971                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
 972                 }
 973
 974                 // Image dimensions + size
 975                 $row .= '<td>';
 976                 $row .= htmlspecialchars( $file->getDimensionsString() );
 977                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $file->getSize() ) . ')</span>';
 978                 $row .= '</td>';
 979
 980                 // Uploading user
 981                 $row .= '<td>';
 982                 if ( $local ) {
 983                         // Hide deleted usernames
 984                         if ( $file->isDeleted( File::DELETED_USER ) ) {
 985                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 986                         } else {
 987                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 988                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 989                         }
 990                 } else {
 991                         $row .= htmlspecialchars( $usertext );
 992                 }
 993                 $row .= '</td><td>';
 994
 995                 // Don't show deleted descriptions
 996                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
 997                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
 998                 } else {
 999                         $row .= $this->skin->commentBlock( $description, $this->title );
1000                 }
1001                 $row .= '</td>';
1002
1003                 $rowClass = null;
1004                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1005                 $classAttr = $rowClass ? " class='$rowClass'" : "";
1006
1007                 return "<tr{$classAttr}>{$row}</tr>\n";
1008         }
1009
1010         protected function getThumbForLine( $file ) {
1011                 global $wgLang;
1012
1013                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1014                         $params = array(
1015                                 'width' => '120',
1016                                 'height' => '120',
1017                         );
1018                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1019
1020                         $thumbnail = $file->transform( $params );
1021                         $options = array(
1022                                 'alt' => wfMsg( 'filehist-thumbtext',
1023                                         $wgLang->timeAndDate( $timestamp, true ),
1024                                         $wgLang->date( $timestamp, true ),
1025                                         $wgLang->time( $timestamp, true ) ),
1026                                 'file-link' => true,
1027                         );
1028
1029                         if ( !$thumbnail ) return wfMsgHtml( 'filehist-nothumb' );
1030
1031                         return $thumbnail->toHtml( $options );
1032                 } else {
1033                         return wfMsgHtml( 'filehist-nothumb' );
1034                 }
1035         }
1036 }
1037
1038 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1039         function __construct( $imagePage ) {
1040                 parent::__construct();
1041                 $this->mImagePage = $imagePage;
1042                 $this->mTitle = clone ( $imagePage->getTitle() );
1043                 $this->mTitle->setFragment( '#filehistory' );
1044                 $this->mImg = null;
1045                 $this->mHist = array();
1046                 $this->mRange = array( 0, 0 ); // display range
1047         }
1048
1049         function getTitle() {
1050                 return $this->mTitle;
1051         }
1052
1053         function getQueryInfo() {
1054                 return false;
1055         }
1056
1057         function getIndexField() {
1058                 return '';
1059         }
1060
1061         function formatRow( $row ) {
1062                 return '';
1063         }
1064
1065         function getBody() {
1066                 $s = '';
1067                 $this->doQuery();
1068                 if ( count( $this->mHist ) ) {
1069                         $list = new ImageHistoryList( $this->mImagePage );
1070                         # Generate prev/next links
1071                         $navLink = $this->getNavigationBar();
1072                         $s = $list->beginImageHistoryList( $navLink );
1073                         // Skip rows there just for paging links
1074                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1075                                 $file = $this->mHist[$i];
1076                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1077                         }
1078                         $s .= $list->endImageHistoryList( $navLink );
1079                 }
1080                 return $s;
1081         }
1082
1083         function doQuery() {
1084                 if ( $this->mQueryDone ) return;
1085                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1086                 if ( !$this->mImg->exists() ) {
1087                         return;
1088                 }
1089                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1090                 if ( $this->mIsBackwards ) {
1091                         // Fetch the file history
1092                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1093                         // The current rev may not meet the offset/limit
1094                         $numRows = count( $this->mHist );
1095                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1096                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1097                         }
1098                 } else {
1099                         // The current rev may not meet the offset
1100                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1101                                 $this->mHist[] = $this->mImg;
1102                         }
1103                         // Old image versions (fetch extra row for nav links)
1104                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1105                         // Fetch the file history
1106                         $this->mHist = array_merge( $this->mHist,
1107                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1108                 }
1109                 $numRows = count( $this->mHist ); // Total number of query results
1110                 if ( $numRows ) {
1111                         # Index value of top item in the list
1112                         $firstIndex = $this->mIsBackwards ?
1113                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1114                         # Discard the extra result row if there is one
1115                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1116                                 if ( $this->mIsBackwards ) {
1117                                         # Index value of item past the index
1118                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1119                                         # Index value of bottom item in the list
1120                                         $lastIndex = $this->mHist[1]->getTimestamp();
1121                                         # Display range
1122                                         $this->mRange = array( 1, $numRows - 1 );
1123                                 } else {
1124                                         # Index value of item past the index
1125                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1126                                         # Index value of bottom item in the list
1127                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1128                                         # Display range
1129                                         $this->mRange = array( 0, $numRows - 2 );
1130                                 }
1131                         } else {
1132                                 # Setting indexes to an empty string means that they will be
1133                                 # omitted if they would otherwise appear in URLs. It just so
1134                                 # happens that this  is the right thing to do in the standard
1135                                 # UI, in all the relevant cases.
1136                                 $this->mPastTheEndIndex = '';
1137                                 # Index value of bottom item in the list
1138                                 $lastIndex = $this->mIsBackwards ?
1139                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1140                                 # Display range
1141                                 $this->mRange = array( 0, $numRows - 1 );
1142                         }
1143                 } else {
1144                         $firstIndex = '';
1145                         $lastIndex = '';
1146                         $this->mPastTheEndIndex = '';
1147                 }
1148                 if ( $this->mIsBackwards ) {
1149                         $this->mIsFirst = ( $numRows < $queryLimit );
1150                         $this->mIsLast = ( $this->mOffset == '' );
1151                         $this->mLastShown = $firstIndex;
1152                         $this->mFirstShown = $lastIndex;
1153                 } else {
1154                         $this->mIsFirst = ( $this->mOffset == '' );
1155                         $this->mIsLast = ( $numRows < $queryLimit );
1156                         $this->mLastShown = $lastIndex;
1157                         $this->mFirstShown = $firstIndex;
1158                 }
1159                 $this->mQueryDone = true;
1160         }
1161 }