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