includes/ImagePage.php

   1 <?php
   2
   3 if( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 /**
   7  * Special handling for image description pages
   8  *
   9  * @ingroup Media
  10  */
  11 class ImagePage extends Article {
  12
  13         /* private */ var $img;  // Image object
  14         /* private */ var $displayImg;
  15         /* private */ var $repo;
  16         /* private */ var $fileLoaded;
  17         var $mExtraDescription = false;
  18         var $dupes;
  19
  20         function __construct( $title ) {
  21                 parent::__construct( $title );
  22                 $this->dupes = null;
  23                 $this->repo = null;
  24         }
  25
  26         public function setFile( $file ) {
  27                 $this->displayImg = $file;
  28                 $this->img = $file;
  29                 $this->fileLoaded = true;
  30         }
  31
  32         protected function loadFile() {
  33                 if( $this->fileLoaded ) {
  34                         return true;
  35                 }
  36                 $this->fileLoaded = true;
  37
  38                 $this->displayImg = $this->img = false;
  39                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  40                 if( !$this->img ) {
  41                         $this->img = wfFindFile( $this->mTitle );
  42                         if( !$this->img ) {
  43                                 $this->img = wfLocalFile( $this->mTitle );
  44                         }
  45                 }
  46                 if( !$this->displayImg ) {
  47                         $this->displayImg = $this->img;
  48                 }
  49                 $this->repo = $this->img->getRepo();
  50         }
  51
  52         /**
  53          * Handler for action=render
  54          * Include body text only; none of the image extras
  55          */
  56         public function render() {
  57                 global $wgOut;
  58                 $wgOut->setArticleBodyOnly( true );
  59                 parent::view();
  60         }
  61
  62         public function view() {
  63                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  64                 $this->loadFile();
  65
  66                 if( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  67                         if( $this->mTitle->getDBkey() == $this->img->getName() ) {
  68                                 // mTitle is the same as the redirect target so ask Article
  69                                 // to perform the redirect for us.
  70                                 return Article::view();
  71                         } else {
  72                                 // mTitle is not the same as the redirect target so it is
  73                                 // probably the redirect page itself. Fake the redirect symbol
  74                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  75                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  76                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  77                                 $this->viewUpdates();
  78                                 return;
  79                         }
  80                 }
  81
  82                 $diff = $wgRequest->getVal( 'diff' );
  83                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  84
  85                 if( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) )
  86                         return Article::view();
  87
  88                 if( $wgShowEXIF && $this->displayImg->exists() ) {
  89                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  90                         $formattedMetadata = $this->displayImg->formatMetadata();
  91                         $showmeta = $formattedMetadata !== false;
  92                 } else {
  93                         $showmeta = false;
  94                 }
  95
  96                 if( !$diff && $this->displayImg->exists() )
  97                         $wgOut->addHTML( $this->showTOC($showmeta) );
  98
  99                 if( !$diff )
 100                         $this->openShowImage();
 101
 102                 # No need to display noarticletext, we use our own message, output in openShowImage()
 103                 if( $this->getID() ) {
 104                         Article::view();
 105                 } else {
 106                         # Just need to set the right headers
 107                         $wgOut->setArticleFlag( true );
 108                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 109                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 110                         $this->viewUpdates();
 111                 }
 112
 113                 # Show shared description, if needed
 114                 if( $this->mExtraDescription ) {
 115                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
 116                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
 117                                 $wgOut->addWikiText( $fol );
 118                         }
 119                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
 120                 } else {
 121                         $this->checkSharedConflict();
 122                 }
 123
 124                 $this->closeShowImage();
 125                 $this->imageHistory();
 126                 // TODO: Cleanup the following
 127
 128                 $wgOut->addHTML( Xml::element( 'h2',
 129                         array( 'id' => 'filelinks' ),
 130                         wfMsg( 'imagelinks' ) ) . "\n" );
 131                 $this->imageDupes();
 132                 $this->imageRedirects();
 133                 $this->imageLinks();
 134
 135                 if( $showmeta ) {
 136                         global $wgStylePath, $wgStyleVersion;
 137                         $expand = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-expand' ) ) );
 138                         $collapse = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-collapse' ) ) );
 139                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
 140                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 141                         $wgOut->addScriptFile( 'metadata.js' );
 142                         $wgOut->addHTML(
 143                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 144                 }
 145         }
 146
 147         public function getRedirectTarget() {
 148                 $this->loadFile();
 149                 if( $this->img->isLocal() ) {
 150                         return parent::getRedirectTarget();
 151                 }
 152                 // Foreign image page
 153                 $from = $this->img->getRedirected();
 154                 $to = $this->img->getName();
 155                 if( $from == $to ) {
 156                         return null;
 157                 }
 158                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 159         }
 160         public function followRedirect() {
 161                 $this->loadFile();
 162                 if( $this->img->isLocal() ) {
 163                         return parent::followRedirect();
 164                 }
 165                 $from = $this->img->getRedirected();
 166                 $to = $this->img->getName();
 167                 if( $from == $to ) {
 168                         return false;
 169                 }
 170                 return Title::makeTitle( NS_FILE, $to );
 171         }
 172         public function isRedirect( $text = false ) {
 173                 $this->loadFile();
 174                 if( $this->img->isLocal() )
 175                         return parent::isRedirect( $text );
 176
 177                 return (bool)$this->img->getRedirected();
 178         }
 179
 180         public function isLocal() {
 181                 $this->loadFile();
 182                 return $this->img->isLocal();
 183         }
 184
 185         public function getFile() {
 186                 $this->loadFile();
 187                 return $this->img;
 188         }
 189
 190         public function getDisplayedFile() {
 191                 $this->loadFile();
 192                 return $this->displayImg;
 193         }
 194
 195         public function getDuplicates() {
 196                 $this->loadFile();
 197                 if( !is_null($this->dupes) ) {
 198                         return $this->dupes;
 199                 }
 200                 if( !( $hash = $this->img->getSha1() ) ) {
 201                         return $this->dupes = array();
 202                 }
 203                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 204                 // Remove duplicates with self and non matching file sizes
 205                 $self = $this->img->getRepoName().':'.$this->img->getName();
 206                 $size = $this->img->getSize();
 207                 foreach ( $dupes as $index => $file ) {
 208                         $key = $file->getRepoName().':'.$file->getName();
 209                         if( $key == $self )
 210                                 unset( $dupes[$index] );
 211                         if( $file->getSize() != $size )
 212                                 unset( $dupes[$index] );
 213                 }
 214                 return $this->dupes = $dupes;
 215
 216         }
 217
 218
 219         /**
 220          * Create the TOC
 221          *
 222          * @param bool $metadata Whether or not to show the metadata link
 223          * @return string
 224          */
 225         protected function showTOC( $metadata ) {
 226                 global $wgLang;
 227                 $r = '<ul id="filetoc">
 228                         <li><a href="#file">' . $wgLang->getNsText( NS_FILE ) . '</a></li>
 229                         <li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>
 230                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 231                         ($metadata ? ' <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 232                 </ul>';
 233                 return $r;
 234         }
 235
 236         /**
 237          * Make a table with metadata to be shown in the output page.
 238          *
 239          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 240          *
 241          * @param array $exif The array containing the EXIF data
 242          * @return string
 243          */
 244         protected function makeMetadataTable( $metadata ) {
 245                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 246                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 247                 foreach ( $metadata as $type => $stuff ) {
 248                         foreach ( $stuff as $v ) {
 249                                 # FIXME, why is this using escapeId for a class?!
 250                                 $class = Sanitizer::escapeId( $v['id'] );
 251                                 if( $type == 'collapsed' ) {
 252                                         $class .= ' collapsable';
 253                                 }
 254                                 $r .= "|- class=\"$class\"\n";
 255                                 $r .= "!| {$v['name']}\n";
 256                                 $r .= "|| {$v['value']}\n";
 257                         }
 258                 }
 259                 $r .= '|}';
 260                 return $r;
 261         }
 262
 263         /**
 264          * Overloading Article's getContent method.
 265          *
 266          * Omit noarticletext if sharedupload; text will be fetched from the
 267          * shared upload server if possible.
 268          */
 269         public function getContent() {
 270                 $this->loadFile();
 271                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 272                         return '';
 273                 }
 274                 return Article::getContent();
 275         }
 276
 277         protected function openShowImage() {
 278                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang, $wgContLang;
 279
 280                 $this->loadFile();
 281
 282                 $full_url  = $this->displayImg->getURL();
 283                 $linkAttribs = false;
 284                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 285                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 286                         $sizeSel = User::getDefaultOption( 'imagesize' );
 287
 288                         // The user offset might still be incorrect, specially if
 289                         // $wgImageLimits got changed (see bug #8858).
 290                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 291                                 // Default to the first offset in $wgImageLimits
 292                                 $sizeSel = 0;
 293                         }
 294                 }
 295                 $max = $wgImageLimits[$sizeSel];
 296                 $maxWidth = $max[0];
 297                 $maxHeight = $max[1];
 298                 $sk = $wgUser->getSkin();
 299                 $dirmark = $wgContLang->getDirMark();
 300
 301                 if( $this->displayImg->exists() ) {
 302                         # image
 303                         $page = $wgRequest->getIntOrNull( 'page' );
 304                         if( is_null( $page ) ) {
 305                                 $params = array();
 306                                 $page = 1;
 307                         } else {
 308                                 $params = array( 'page' => $page );
 309                         }
 310                         $width_orig = $this->displayImg->getWidth();
 311                         $width = $width_orig;
 312                         $height_orig = $this->displayImg->getHeight();
 313                         $height = $height_orig;
 314                         $mime = $this->displayImg->getMimeType();
 315                         $showLink = false;
 316                         $linkAttribs = array( 'href' => $full_url );
 317                         $longDesc = $this->displayImg->getLongDesc();
 318
 319                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) )       ;
 320
 321                         if( $this->displayImg->allowInlineDisplay() ) {
 322                                 # image
 323
 324                                 # "Download high res version" link below the image
 325                                 #$msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 326                                 # We'll show a thumbnail of this image
 327                                 if( $width > $maxWidth || $height > $maxHeight ) {
 328                                         # Calculate the thumbnail size.
 329                                         # First case, the limiting factor is the width, not the height.
 330                                         if( $width / $height >= $maxWidth / $maxHeight ) {
 331                                                 $height = round( $height * $maxWidth / $width);
 332                                                 $width = $maxWidth;
 333                                                 # Note that $height <= $maxHeight now.
 334                                         } else {
 335                                                 $newwidth = floor( $width * $maxHeight / $height);
 336                                                 $height = round( $height * $newwidth / $width );
 337                                                 $width = $newwidth;
 338                                                 # Note that $height <= $maxHeight now, but might not be identical
 339                                                 # because of rounding.
 340                                         }
 341                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 342                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 343                                                 $wgLang->formatNum( $width ),
 344                                                 $wgLang->formatNum( $height )
 345                                         );
 346                                 } else {
 347                                         # Image is small enough to show full size on image page
 348                                         $msgbig = htmlspecialchars( $this->displayImg->getName() );
 349                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 350                                 }
 351
 352                                 $params['width'] = $width;
 353                                 $thumbnail = $this->displayImg->transform( $params );
 354
 355                                 $anchorclose = "<br />";
 356                                 if( $this->displayImg->mustRender() ) {
 357                                         $showLink = true;
 358                                 } else {
 359                                         $anchorclose .=
 360                                                 $msgsmall .
 361                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 362                                 }
 363
 364                                 if( $this->displayImg->isMultipage() ) {
 365                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 366                                 }
 367
 368                                 if( $thumbnail ) {
 369                                         $options = array(
 370                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 371                                                 'file-link' => true,
 372                                         );
 373                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 374                                                 $thumbnail->toHtml( $options ) .
 375                                                 $anchorclose . '</div>' );
 376                                 }
 377
 378                                 if( $this->displayImg->isMultipage() ) {
 379                                         $count = $this->displayImg->pageCount();
 380
 381                                         if( $page > 1 ) {
 382                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 383                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 384                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 385                                                         array( 'page' => $page - 1 ) );
 386                                         } else {
 387                                                 $thumb1 = '';
 388                                         }
 389
 390                                         if( $page < $count ) {
 391                                                 $label = wfMsg( 'imgmultipagenext' );
 392                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 393                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 394                                                         array( 'page' => $page + 1 ) );
 395                                         } else {
 396                                                 $thumb2 = '';
 397                                         }
 398
 399                                         global $wgScript;
 400
 401                                         $formParams = array(
 402                                                 'name' => 'pageselector',
 403                                                 'action' => $wgScript,
 404                                                 'onchange' => 'document.pageselector.submit();',
 405                                         );
 406
 407                                         $option = array();
 408                                         for ( $i=1; $i <= $count; $i++ ) {
 409                                                 $options[] = Xml::option( $wgLang->formatNum($i), $i, $i == $page );
 410                                         }
 411                                         $select = Xml::tags( 'select',
 412                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 413                                                 implode( "\n", $options ) );
 414
 415                                         $wgOut->addHTML(
 416                                                 '</td><td><div class="multipageimagenavbox">' .
 417                                                 Xml::openElement( 'form', $formParams ) .
 418                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 419                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 420                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 421                                                 Xml::closeElement( 'form' ) .
 422                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 423                                         );
 424                                 }
 425                         } else {
 426                                 #if direct link is allowed but it's not a renderable image, show an icon.
 427                                 if( $this->displayImg->isSafeFile() ) {
 428                                         $icon= $this->displayImg->iconThumb();
 429
 430                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 431                                         $icon->toHtml( array( 'desc-link' => true ) ) .
 432                                         '</div>' );
 433                                 }
 434
 435                                 $showLink = true;
 436                         }
 437
 438
 439                         if($showLink) {
 440                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 441
 442                                 if( !$this->displayImg->isSafeFile() ) {
 443                                         $warning = wfMsgNoTrans( 'mediawarning' );
 444                                         $wgOut->addWikiText( <<<EOT
 445 <div class="fullMedia">
 446 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 447 <span class="fileInfo"> $longDesc</span>
 448 </div>
 449
 450 <div class="mediaWarning">$warning</div>
 451 EOT
 452                                                 );
 453                                 } else {
 454                                         $wgOut->addWikiText( <<<EOT
 455 <div class="fullMedia">
 456 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $longDesc</span>
 457 </div>
 458 EOT
 459                                                 );
 460                                 }
 461                         }
 462
 463                         if( !$this->displayImg->isLocal() ) {
 464                                 $this->printSharedImageText();
 465                         }
 466                 } else {
 467                         # Image does not exist
 468
 469                         $title = SpecialPage::getTitleFor( 'Upload' );
 470                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 471                                 'wpDestFile=' . urlencode( $this->displayImg->getName() ) );
 472                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 473                 }
 474         }
 475
 476         /**
 477          * Show a notice that the file is from a shared repository
 478          */
 479         protected function printSharedImageText() {
 480                 global $wgOut, $wgUser;
 481
 482                 $this->loadFile();
 483
 484                 $descUrl = $this->img->getDescriptionUrl();
 485                 $descText = $this->img->getDescriptionText();
 486                 $s = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml( 'sharedupload' );
 487                 if( $descUrl ) {
 488                         $sk = $wgUser->getSkin();
 489                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadwiki-linktext' ) );
 490                         $msg = ( $descText ) ? 'shareduploadwiki-desc' : 'shareduploadwiki';
 491                         $msg = wfMsgExt( $msg, array( 'parseinline', 'replaceafter' ), $link );
 492                         if( $msg != '-' ) {
 493                                 # Show message only if not voided by local sysops
 494                                 $s .= $msg;
 495                         }
 496                 }
 497                 $s .= "</div>";
 498                 $wgOut->addHTML( $s );
 499
 500                 if( $descText ) {
 501                         $this->mExtraDescription = $descText;
 502                 }
 503         }
 504
 505         /*
 506          * Check for files with the same name on the foreign repos.
 507          */
 508         protected function checkSharedConflict() {
 509                 global $wgOut, $wgUser;
 510
 511                 $repoGroup = RepoGroup::singleton();
 512                 if( !$repoGroup->hasForeignRepos() ) {
 513                         return;
 514                 }
 515
 516                 $this->loadFile();
 517                 if( !$this->img->isLocal() ) {
 518                         return;
 519                 }
 520
 521                 $this->dupFile = null;
 522                 $repoGroup->forEachForeignRepo( array( $this, 'checkSharedConflictCallback' ) );
 523
 524                 if( !$this->dupFile )
 525                         return;
 526                 $dupfile = $this->dupFile;
 527                 $same = (
 528                         ($this->img->getSha1() == $dupfile->getSha1()) &&
 529                         ($this->img->getSize() == $dupfile->getSize())
 530                 );
 531
 532                 $sk = $wgUser->getSkin();
 533                 $descUrl = $dupfile->getDescriptionUrl();
 534                 if( $same ) {
 535                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadduplicate-linktext' ) );
 536                         $wgOut->addHTML( '<div id="shared-image-dup">' . wfMsgWikiHtml( 'shareduploadduplicate', $link ) . '</div>' );
 537                 } else {
 538                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadconflict-linktext' ) );
 539                         $wgOut->addHTML( '<div id="shared-image-conflict">' . wfMsgWikiHtml( 'shareduploadconflict', $link ) . '</div>' );
 540                 }
 541         }
 542
 543         public function checkSharedConflictCallback( $repo ) {
 544                 $this->loadFile();
 545                 $dupfile = $repo->newFile( $this->img->getTitle() );
 546                 if( $dupfile && $dupfile->exists() ) {
 547                         $this->dupFile = $dupfile;
 548                         return $dupfile->exists();
 549                 }
 550                 return false;
 551         }
 552
 553         public function getUploadUrl() {
 554                 $this->loadFile();
 555                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 556                 return $uploadTitle->getFullUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) . '&wpForReUpload=1' );
 557         }
 558
 559         /**
 560          * Print out the various links at the bottom of the image page, e.g. reupload,
 561          * external editing (and instructions link) etc.
 562          */
 563         protected function uploadLinksBox() {
 564                 global $wgUser, $wgOut;
 565
 566                 $this->loadFile();
 567                 if( !$this->img->isLocal() )
 568                         return;
 569
 570                 $sk = $wgUser->getSkin();
 571
 572                 $wgOut->addHTML( '<br /><ul>' );
 573
 574                 # "Upload a new version of this file" link
 575                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 576                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 577                         $wgOut->addHTML( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 578                 }
 579
 580                 # Link to Special:FileDuplicateSearch
 581                 $dupeLink = $sk->makeKnownLinkObj( SpecialPage::getTitleFor( 'FileDuplicateSearch', $this->mTitle->getDBkey() ), wfMsgHtml( 'imagepage-searchdupe' ) );
 582                 $wgOut->addHTML( "<li>{$dupeLink}</li>" );
 583
 584                 # External editing link
 585                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 586                 $wgOut->addHTML( '<li>' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . '</small></li>' );
 587
 588                 $wgOut->addHTML( '</ul>' );
 589         }
 590
 591         protected function closeShowImage() {} # For overloading
 592
 593         /**
 594          * If the page we've just displayed is in the "Image" namespace,
 595          * we follow it with an upload history of the image and its usage.
 596          */
 597         protected function imageHistory() {
 598                 global $wgOut, $wgUseExternalEditor;
 599
 600                 $this->loadFile();
 601                 $pager = new ImageHistoryPseudoPager( $this );
 602                 $wgOut->addHTML( $pager->getBody() );
 603
 604                 $this->img->resetHistory(); // free db resources
 605
 606                 # Exist check because we don't want to show this on pages where an image
 607                 # doesn't exist along with the noimage message, that would suck. -ævar
 608                 if( $wgUseExternalEditor && $this->img->exists() ) {
 609                         $this->uploadLinksBox();
 610                 }
 611         }
 612
 613         protected function imageLinks() {
 614                 global $wgUser, $wgOut, $wgLang;
 615
 616                 $limit = 100;
 617
 618                 $dbr = wfGetDB( DB_SLAVE );
 619
 620                 $res = $dbr->select(
 621                         array( 'imagelinks', 'page' ),
 622                         array( 'page_namespace', 'page_title' ),
 623                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 624                         __METHOD__,
 625                         array( 'LIMIT' => $limit + 1)
 626                 );
 627                 $count = $dbr->numRows( $res );
 628                 if( $count == 0 ) {
 629                         $wgOut->addHTML( "<div id='mw-imagepage-nolinkstoimage'>\n" );
 630                         $wgOut->addWikiMsg( 'nolinkstoimage' );
 631                         $wgOut->addHTML( "</div>\n" );
 632                         return;
 633                 }
 634
 635                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 636                 if( $count <= $limit - 1 ) {
 637                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 638                 } else {
 639                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 640                         $wgOut->addWikiMsg( 'linkstoimage-more',
 641                                 $wgLang->formatNum( $limit ),
 642                                 $this->mTitle->getPrefixedDBkey()
 643                         );
 644                 }
 645
 646                 $wgOut->addHTML( "<ul class='mw-imagepage-linkstoimage'>\n" );
 647                 $sk = $wgUser->getSkin();
 648                 $count = 0;
 649                 while ( $s = $res->fetchObject() ) {
 650                         $count++;
 651                         if( $count <= $limit ) {
 652                                 // We have not yet reached the extra one that tells us there is more to fetch
 653                                 $name = Title::makeTitle( $s->page_namespace, $s->page_title );
 654                                 $link = $sk->makeKnownLinkObj( $name, "" );
 655                                 $wgOut->addHTML( "<li>{$link}</li>\n" );
 656                         }
 657                 }
 658                 $wgOut->addHTML( "</ul></div>\n" );
 659                 $res->free();
 660
 661                 // Add a links to [[Special:Whatlinkshere]]
 662                 if( $count > $limit )
 663                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 664         }
 665
 666         protected function imageRedirects() {
 667                 global $wgUser, $wgOut, $wgLang;
 668
 669                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 670                 if( count( $redirects ) == 0 ) return;
 671
 672                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 673                 $wgOut->addWikiMsg( 'redirectstofile',
 674                         $wgLang->formatNum( count( $redirects ) )
 675                 );
 676                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 677
 678                 $sk = $wgUser->getSkin();
 679                 foreach ( $redirects as $title ) {
 680                         $link = $sk->makeKnownLinkObj( $title, "", "redirect=no" );
 681                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 682                 }
 683                 $wgOut->addHTML( "</ul></div>\n" );
 684
 685         }
 686
 687         protected function imageDupes() {
 688                 global $wgOut, $wgUser, $wgLang;
 689
 690                 $this->loadFile();
 691
 692                 $dupes = $this->getDuplicates();
 693                 if( count( $dupes ) == 0 ) return;
 694
 695                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 696                 $wgOut->addWikiMsg( 'duplicatesoffile',
 697                         $wgLang->formatNum( count( $dupes ) )
 698                 );
 699                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 700
 701                 $sk = $wgUser->getSkin();
 702                 foreach ( $dupes as $file ) {
 703                         if( $file->isLocal() )
 704                                 $link = $sk->makeKnownLinkObj( $file->getTitle(), "" );
 705                         else {
 706                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 707                                         $file->getTitle()->getPrefixedText() );
 708                         }
 709                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 710                 }
 711                 $wgOut->addHTML( "</ul></div>\n" );
 712         }
 713
 714         /**
 715          * Delete the file, or an earlier version of it
 716          */
 717         public function delete() {
 718                 $this->loadFile();
 719                 if( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 720                         // Standard article deletion
 721                         Article::delete();
 722                         return;
 723                 }
 724                 $deleter = new FileDeleteForm( $this->img );
 725                 $deleter->execute();
 726         }
 727
 728         /**
 729          * Revert the file to an earlier version
 730          */
 731         public function revert() {
 732                 $this->loadFile();
 733                 $reverter = new FileRevertForm( $this->img );
 734                 $reverter->execute();
 735         }
 736
 737         /**
 738          * Override handling of action=purge
 739          */
 740         public function doPurge() {
 741                 $this->loadFile();
 742                 if( $this->img->exists() ) {
 743                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 744                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 745                         $update->doUpdate();
 746                         $this->img->upgradeRow();
 747                         $this->img->purgeCache();
 748                 } else {
 749                         wfDebug( "ImagePage::doPurge no image\n" );
 750                 }
 751                 parent::doPurge();
 752         }
 753
 754         /**
 755          * Display an error with a wikitext description
 756          */
 757         function showError( $description ) {
 758                 global $wgOut;
 759                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 760                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 761                 $wgOut->setArticleRelated( false );
 762                 $wgOut->enableClientCache( false );
 763                 $wgOut->addWikiText( $description );
 764         }
 765
 766 }
 767
 768 /**
 769  * Builds the image revision log shown on image pages
 770  *
 771  * @ingroup Media
 772  */
 773 class ImageHistoryList {
 774
 775         protected $imagePage, $img, $skin, $title, $repo;
 776
 777         public function __construct( $imagePage ) {
 778                 global $wgUser;
 779                 $this->skin = $wgUser->getSkin();
 780                 $this->current = $imagePage->getFile();
 781                 $this->img = $imagePage->getDisplayedFile();
 782                 $this->title = $imagePage->getTitle();
 783                 $this->imagePage = $imagePage;
 784         }
 785
 786         public function getImagePage() {
 787                 return $this->imagePage;
 788         }
 789
 790         public function getSkin() {
 791                 return $this->skin;
 792         }
 793
 794         public function getFile() {
 795                 return $this->img;
 796         }
 797
 798         public function beginImageHistoryList( $navLinks = '' ) {
 799                 global $wgOut, $wgUser;
 800                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) )
 801                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 802                         . $navLinks
 803                         . Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
 804                         . '<tr><td></td>'
 805                         . ( $this->current->isLocal() && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ? '<td></td>' : '' )
 806                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 807                         . '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>'
 808                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 809                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 810                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 811                         . "</tr>\n";
 812         }
 813
 814         public function endImageHistoryList( $navLinks = '' ) {
 815                 return "</table>\n$navLinks\n";
 816         }
 817
 818         public function imageHistoryLine( $iscur, $file ) {
 819                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 820
 821                 $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 822                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 823                 $user = $file->getUser('id');
 824                 $usertext = $file->getUser('text');
 825                 $size = $file->getSize();
 826                 $description = $file->getDescription();
 827                 $dims = $file->getDimensionsString();
 828                 $sha1 = $file->getSha1();
 829
 830                 $local = $this->current->isLocal();
 831                 $row = $css = $selected = '';
 832
 833                 // Deletion link
 834                 if( $local && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ) {
 835                         $row .= '<td>';
 836                         # Link to remove from history
 837                         if( $wgUser->isAllowed( 'delete' ) ) {
 838                                 $q = array();
 839                                 $q[] = 'action=delete';
 840                                 if( !$iscur )
 841                                         $q[] = 'oldimage=' . urlencode( $img );
 842                                 $row .= $this->skin->makeKnownLinkObj(
 843                                         $this->title,
 844                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 845                                         implode( '&', $q )
 846                                 );
 847                         }
 848                         # Link to hide content
 849                         if( $wgUser->isAllowed( 'deleterevision' ) ) {
 850                                 if( $wgUser->isAllowed('delete') ) {
 851                                         $row .= '<br/>';
 852                                 }
 853                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 854                                 // If file is top revision or locked from this user, don't link
 855                                 if( $iscur || !$file->userCan(File::DELETED_RESTRICTED) ) {
 856                                         $del = wfMsgHtml( 'rev-delundel' );
 857                                 } else {
 858                                         // If the file was hidden, link to sha-1
 859                                         list($ts,$name) = explode('!',$img,2);
 860                                         $del = $this->skin->makeKnownLinkObj( $revdel,  wfMsg( 'rev-delundel' ),
 861                                                 'target=' . urlencode( $wgTitle->getPrefixedText() ) .
 862                                                 '&oldimage=' . urlencode( $ts ) );
 863                                         // Bolden oversighted content
 864                                         if( $file->isDeleted(File::DELETED_RESTRICTED) )
 865                                                 $del = "<strong>$del</strong>";
 866                                 }
 867                                 $row .= "<tt style='white-space: nowrap;'><small>$del</small></tt>";
 868                         }
 869                         $row .= '</td>';
 870                 }
 871
 872                 // Reversion link/current indicator
 873                 $row .= '<td>';
 874                 if( $iscur ) {
 875                         $row .= wfMsgHtml( 'filehist-current' );
 876                 } elseif( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 877                         if( $file->isDeleted(File::DELETED_FILE) ) {
 878                                 $row .= wfMsgHtml('filehist-revert');
 879                         } else {
 880                                 $q = array();
 881                                 $q[] = 'action=revert';
 882                                 $q[] = 'oldimage=' . urlencode( $img );
 883                                 $q[] = 'wpEditToken=' . urlencode( $wgUser->editToken( $img ) );
 884                                 $row .= $this->skin->makeKnownLinkObj( $this->title,
 885                                         wfMsgHtml( 'filehist-revert' ),
 886                                         implode( '&', $q ) );
 887                         }
 888                 }
 889                 $row .= '</td>';
 890
 891                 // Date/time and image link
 892                 if( $file->getTimestamp() === $this->img->getTimestamp() ) {
 893                         $selected = "class='filehistory-selected'";
 894                 }
 895                 $row .= "<td $selected style='white-space: nowrap;'>";
 896                 if( !$file->userCan(File::DELETED_FILE) ) {
 897                         # Don't link to unviewable files
 898                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 899                 } else if( $file->isDeleted(File::DELETED_FILE) ) {
 900                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 901                         # Make a link to review the image
 902                         $url = $this->skin->makeKnownLinkObj( $revdel, $wgLang->timeAndDate( $timestamp, true ),
 903                                 "target=".$wgTitle->getPrefixedText()."&file=$sha1.".$this->current->getExtension() );
 904                         $row .= '<span class="history-deleted">'.$url.'</span>';
 905                 } else {
 906                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 907                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 908                 }
 909
 910                 // Thumbnail
 911                 if( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
 912                         $params = array(
 913                                 'width' => '120',
 914                                 'height' => '120',
 915                         );
 916                         $thumbnail = $file->transform( $params );
 917                         $options = array(
 918                                 'alt' => wfMsg( 'filehist-thumbtext', $wgLang->timeAndDate( $timestamp, true ) ),
 919                                 'file-link' => true,
 920                         );
 921                         $row .= '</td><td>' . $thumbnail->toHtml( $options );
 922                 } else {
 923                         $row .= '</td><td>' . wfMsgHtml( 'filehist-nothumb' );
 924                 }
 925                 $row .= "</td><td>";
 926
 927                 // Image dimensions
 928                 $row .= htmlspecialchars( $dims );
 929
 930                 // File size
 931                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $size ) . ')</span>';
 932
 933                 // Uploading user
 934                 $row .= '</td><td>';
 935                 if( $local ) {
 936                         // Hide deleted usernames
 937                         if( $file->isDeleted(File::DELETED_USER) ) {
 938                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 939                         } else {
 940                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 941                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 942                         }
 943                 } else {
 944                         $row .= htmlspecialchars( $usertext );
 945                 }
 946                 $row .= '</td><td>';
 947
 948                 // Don't show deleted descriptions
 949                 if( $file->isDeleted(File::DELETED_COMMENT) ) {
 950                         $row .= '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 951                 } else {
 952                         $row .= $this->skin->commentBlock( $description, $this->title );
 953                 }
 954                 $row .= '</td>';
 955
 956                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
 957                 $classAttr = $rowClass ? " class='$rowClass'" : "";
 958
 959                 return "<tr{$classAttr}>{$row}</tr>\n";
 960         }
 961 }
 962
 963 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
 964         function __construct( $imagePage ) {
 965                 parent::__construct();
 966                 $this->mImagePage = $imagePage;
 967                 $this->mTitle = clone( $imagePage->getTitle() );
 968                 $this->mTitle->setFragment( '#filehistory' );
 969                 $this->mImg = NULL;
 970                 $this->mHist = array();
 971                 $this->mRange = array( 0, 0 ); // display range
 972         }
 973
 974         function getTitle() {
 975                 return $this->mTitle;
 976         }
 977
 978         function getQueryInfo() {
 979                 return false;
 980         }
 981
 982         function getIndexField() {
 983                 return '';
 984         }
 985
 986         function formatRow( $row ) {
 987                 return '';
 988         }
 989
 990         function getBody() {
 991                 $s = '';
 992                 $this->doQuery();
 993                 if( count($this->mHist) ) {
 994                         $list = new ImageHistoryList( $this->mImagePage );
 995                         # Generate prev/next links
 996                         $navLink = $this->getNavigationBar();
 997                         $s = $list->beginImageHistoryList($navLink);
 998                         // Skip rows there just for paging links
 999                         for( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1000                                 $file = $this->mHist[$i];
1001                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1002                         }
1003                         $s .= $list->endImageHistoryList($navLink);
1004                 }
1005                 return $s;
1006         }
1007
1008         function doQuery() {
1009                 if( $this->mQueryDone ) return;
1010                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1011                 if( !$this->mImg->exists() ) {
1012                         return;
1013                 }
1014                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1015                 if( $this->mIsBackwards ) {
1016                         // Fetch the file history
1017                         $this->mHist = $this->mImg->getHistory($queryLimit,null,$this->mOffset,false);
1018                         // The current rev may not meet the offset/limit
1019                         $numRows = count($this->mHist);
1020                         if( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1021                                 $this->mHist = array_merge( array($this->mImg), $this->mHist );
1022                         }
1023                 } else {
1024                         // The current rev may not meet the offset
1025                         if( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1026                                 $this->mHist[] = $this->mImg;
1027                         }
1028                         // Old image versions (fetch extra row for nav links)
1029                         $oiLimit = count($this->mHist) ? $this->mLimit : $this->mLimit+1;
1030                         // Fetch the file history
1031                         $this->mHist = array_merge( $this->mHist,
1032                                 $this->mImg->getHistory($oiLimit,$this->mOffset,null,false) );
1033                 }
1034                 $numRows = count($this->mHist); // Total number of query results
1035                 if( $numRows ) {
1036                         # Index value of top item in the list
1037                         $firstIndex = $this->mIsBackwards ?
1038                                 $this->mHist[$numRows-1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1039                         # Discard the extra result row if there is one
1040                         if( $numRows > $this->mLimit && $numRows > 1 ) {
1041                                 if( $this->mIsBackwards ) {
1042                                         # Index value of item past the index
1043                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1044                                         # Index value of bottom item in the list
1045                                         $lastIndex = $this->mHist[1]->getTimestamp();
1046                                         # Display range
1047                                         $this->mRange = array( 1, $numRows-1 );
1048                                 } else {
1049                                         # Index value of item past the index
1050                                         $this->mPastTheEndIndex = $this->mHist[$numRows-1]->getTimestamp();
1051                                         # Index value of bottom item in the list
1052                                         $lastIndex = $this->mHist[$numRows-2]->getTimestamp();
1053                                         # Display range
1054                                         $this->mRange = array( 0, $numRows-2 );
1055                                 }
1056                         } else {
1057                                 # Setting indexes to an empty string means that they will be
1058                                 # omitted if they would otherwise appear in URLs. It just so
1059                                 # happens that this  is the right thing to do in the standard
1060                                 # UI, in all the relevant cases.
1061                                 $this->mPastTheEndIndex = '';
1062                                 # Index value of bottom item in the list
1063                                 $lastIndex = $this->mIsBackwards ?
1064                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows-1]->getTimestamp();
1065                                 # Display range
1066                                 $this->mRange = array( 0, $numRows-1 );
1067                         }
1068                 } else {
1069                         $firstIndex = '';
1070                         $lastIndex = '';
1071                         $this->mPastTheEndIndex = '';
1072                 }
1073                 if( $this->mIsBackwards ) {
1074                         $this->mIsFirst = ( $numRows < $queryLimit );
1075                         $this->mIsLast = ( $this->mOffset == '' );
1076                         $this->mLastShown = $firstIndex;
1077                         $this->mFirstShown = $lastIndex;
1078                 } else {
1079                         $this->mIsFirst = ( $this->mOffset == '' );
1080                         $this->mIsLast = ( $numRows < $queryLimit );
1081                         $this->mLastShown = $lastIndex;
1082                         $this->mFirstShown = $firstIndex;
1083                 }
1084                 $this->mQueryDone = true;
1085         }
1086 }