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