includes/ImagePage.php

   1 <?php
   2
   3 if( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 /**
   7  * Special handling for image description pages
   8  *
   9  * @ingroup Media
  10  */
  11 class ImagePage extends Article {
  12
  13         /* private */ var $img;  // Image object
  14         /* private */ var $displayImg;
  15         /* private */ var $repo;
  16         /* private */ var $fileLoaded;
  17         var $mExtraDescription = false;
  18         var $dupes;
  19
  20         function __construct( $title ) {
  21                 parent::__construct( $title );
  22                 $this->dupes = null;
  23                 $this->repo = null;
  24         }
  25
  26         public function setFile( $file ) {
  27                 $this->displayImg = $file;
  28                 $this->img = $file;
  29                 $this->fileLoaded = true;
  30         }
  31
  32         protected function loadFile() {
  33                 if( $this->fileLoaded ) {
  34                         return true;
  35                 }
  36                 $this->fileLoaded = true;
  37
  38                 $this->displayImg = $this->img = false;
  39                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  40                 if( !$this->img ) {
  41                         $this->img = wfFindFile( $this->mTitle );
  42                         if( !$this->img ) {
  43                                 $this->img = wfLocalFile( $this->mTitle );
  44                         }
  45                 }
  46                 if( !$this->displayImg ) {
  47                         $this->displayImg = $this->img;
  48                 }
  49                 $this->repo = $this->img->getRepo();
  50         }
  51
  52         /**
  53          * Handler for action=render
  54          * Include body text only; none of the image extras
  55          */
  56         public function render() {
  57                 global $wgOut;
  58                 $wgOut->setArticleBodyOnly( true );
  59                 parent::view();
  60         }
  61
  62         public function view() {
  63                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  64                 $this->loadFile();
  65
  66                 if( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  67                         if( $this->mTitle->getDBkey() == $this->img->getName() ) {
  68                                 // mTitle is the same as the redirect target so ask Article
  69                                 // to perform the redirect for us.
  70                                 return Article::view();
  71                         } else {
  72                                 // mTitle is not the same as the redirect target so it is
  73                                 // probably the redirect page itself. Fake the redirect symbol
  74                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  75                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  76                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  77                                 $this->viewUpdates();
  78                                 return;
  79                         }
  80                 }
  81
  82                 $diff = $wgRequest->getVal( 'diff' );
  83                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  84
  85                 if( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) )
  86                         return Article::view();
  87
  88                 if( $wgShowEXIF && $this->displayImg->exists() ) {
  89                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
  90                         $formattedMetadata = $this->displayImg->formatMetadata();
  91                         $showmeta = $formattedMetadata !== false;
  92                 } else {
  93                         $showmeta = false;
  94                 }
  95
  96                 if( !$diff && $this->displayImg->exists() )
  97                         $wgOut->addHTML( $this->showTOC($showmeta) );
  98
  99                 if( !$diff )
 100                         $this->openShowImage();
 101
 102                 # No need to display noarticletext, we use our own message, output in openShowImage()
 103                 if( $this->getID() ) {
 104                         Article::view();
 105                 } else {
 106                         # Just need to set the right headers
 107                         $wgOut->setArticleFlag( true );
 108                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 109                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 110                         $this->viewUpdates();
 111                 }
 112
 113                 # Show shared description, if needed
 114                 if( $this->mExtraDescription ) {
 115                         $fol = wfMsgNoTrans( 'shareddescriptionfollows' );
 116                         if( $fol != '-' && !wfEmptyMsg( 'shareddescriptionfollows', $fol ) ) {
 117                                 $wgOut->addWikiText( $fol );
 118                         }
 119                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . '</div>' );
 120                 } else {
 121                         $this->checkSharedConflict();
 122                 }
 123
 124                 $this->closeShowImage();
 125                 $this->imageHistory();
 126                 // TODO: Cleanup the following
 127
 128                 $wgOut->addHTML( Xml::element( 'h2',
 129                         array( 'id' => 'filelinks' ),
 130                         wfMsg( 'imagelinks' ) ) . "\n" );
 131                 $this->imageDupes();
 132                 // TODO: We may want to find local images redirecting to a foreign
 133                 // file: "The following local files redirect to this file"
 134                 if( $this->img->isLocal() ) {
 135                         $this->imageRedirects();
 136                 }
 137                 $this->imageLinks();
 138
 139                 if( $showmeta ) {
 140                         global $wgStylePath, $wgStyleVersion;
 141                         $expand = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-expand' ) ) );
 142                         $collapse = htmlspecialchars( Xml::escapeJsString( wfMsg( 'metadata-collapse' ) ) );
 143                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ). "\n" );
 144                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 145                         $wgOut->addScriptFile( 'metadata.js' );
 146                         $wgOut->addHTML(
 147                                 "<script type=\"text/javascript\">attachMetadataToggle('mw_metadata', '$expand', '$collapse');</script>\n" );
 148                 }
 149         }
 150
 151         public function getRedirectTarget() {
 152                 $this->loadFile();
 153                 if( $this->img->isLocal() ) {
 154                         return parent::getRedirectTarget();
 155                 }
 156                 // Foreign image page
 157                 $from = $this->img->getRedirected();
 158                 $to = $this->img->getName();
 159                 if( $from == $to ) {
 160                         return null;
 161                 }
 162                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 163         }
 164         public function followRedirect() {
 165                 $this->loadFile();
 166                 if( $this->img->isLocal() ) {
 167                         return parent::followRedirect();
 168                 }
 169                 $from = $this->img->getRedirected();
 170                 $to = $this->img->getName();
 171                 if( $from == $to ) {
 172                         return false;
 173                 }
 174                 return Title::makeTitle( NS_FILE, $to );
 175         }
 176         public function isRedirect( $text = false ) {
 177                 $this->loadFile();
 178                 if( $this->img->isLocal() )
 179                         return parent::isRedirect( $text );
 180
 181                 return (bool)$this->img->getRedirected();
 182         }
 183
 184         public function isLocal() {
 185                 $this->loadFile();
 186                 return $this->img->isLocal();
 187         }
 188
 189         public function getFile() {
 190                 $this->loadFile();
 191                 return $this->img;
 192         }
 193
 194         public function getDisplayedFile() {
 195                 $this->loadFile();
 196                 return $this->displayImg;
 197         }
 198
 199         public function getDuplicates() {
 200                 $this->loadFile();
 201                 if( !is_null($this->dupes) ) {
 202                         return $this->dupes;
 203                 }
 204                 if( !( $hash = $this->img->getSha1() ) ) {
 205                         return $this->dupes = array();
 206                 }
 207                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 208                 // Remove duplicates with self and non matching file sizes
 209                 $self = $this->img->getRepoName().':'.$this->img->getName();
 210                 $size = $this->img->getSize();
 211                 foreach ( $dupes as $index => $file ) {
 212                         $key = $file->getRepoName().':'.$file->getName();
 213                         if( $key == $self )
 214                                 unset( $dupes[$index] );
 215                         if( $file->getSize() != $size )
 216                                 unset( $dupes[$index] );
 217                 }
 218                 return $this->dupes = $dupes;
 219
 220         }
 221
 222
 223         /**
 224          * Create the TOC
 225          *
 226          * @param bool $metadata Whether or not to show the metadata link
 227          * @return string
 228          */
 229         protected function showTOC( $metadata ) {
 230                 global $wgLang;
 231                 $r = '<ul id="filetoc">
 232                         <li><a href="#file">' . $wgLang->getNsText( NS_FILE ) . '</a></li>
 233                         <li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>
 234                         <li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>' .
 235                         ($metadata ? ' <li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>' : '') . '
 236                 </ul>';
 237                 return $r;
 238         }
 239
 240         /**
 241          * Make a table with metadata to be shown in the output page.
 242          *
 243          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 244          *
 245          * @param array $exif The array containing the EXIF data
 246          * @return string
 247          */
 248         protected function makeMetadataTable( $metadata ) {
 249                 $r = wfMsg( 'metadata-help' ) . "\n\n";
 250                 $r .= "{| id=mw_metadata class=mw_metadata\n";
 251                 foreach ( $metadata as $type => $stuff ) {
 252                         foreach ( $stuff as $v ) {
 253                                 # FIXME, why is this using escapeId for a class?!
 254                                 $class = Sanitizer::escapeId( $v['id'] );
 255                                 if( $type == 'collapsed' ) {
 256                                         $class .= ' collapsable';
 257                                 }
 258                                 $r .= "|- class=\"$class\"\n";
 259                                 $r .= "!| {$v['name']}\n";
 260                                 $r .= "|| {$v['value']}\n";
 261                         }
 262                 }
 263                 $r .= '|}';
 264                 return $r;
 265         }
 266
 267         /**
 268          * Overloading Article's getContent method.
 269          *
 270          * Omit noarticletext if sharedupload; text will be fetched from the
 271          * shared upload server if possible.
 272          */
 273         public function getContent() {
 274                 $this->loadFile();
 275                 if( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 276                         return '';
 277                 }
 278                 return Article::getContent();
 279         }
 280
 281         protected function openShowImage() {
 282                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgLang, $wgContLang;
 283
 284                 $this->loadFile();
 285
 286                 $full_url  = $this->displayImg->getURL();
 287                 $linkAttribs = false;
 288                 $sizeSel = intval( $wgUser->getOption( 'imagesize') );
 289                 if( !isset( $wgImageLimits[$sizeSel] ) ) {
 290                         $sizeSel = User::getDefaultOption( 'imagesize' );
 291
 292                         // The user offset might still be incorrect, specially if
 293                         // $wgImageLimits got changed (see bug #8858).
 294                         if( !isset( $wgImageLimits[$sizeSel] ) ) {
 295                                 // Default to the first offset in $wgImageLimits
 296                                 $sizeSel = 0;
 297                         }
 298                 }
 299                 $max = $wgImageLimits[$sizeSel];
 300                 $maxWidth = $max[0];
 301                 $maxHeight = $max[1];
 302                 $sk = $wgUser->getSkin();
 303                 $dirmark = $wgContLang->getDirMark();
 304
 305                 if( $this->displayImg->exists() ) {
 306                         # image
 307                         $page = $wgRequest->getIntOrNull( 'page' );
 308                         if( is_null( $page ) ) {
 309                                 $params = array();
 310                                 $page = 1;
 311                         } else {
 312                                 $params = array( 'page' => $page );
 313                         }
 314                         $width_orig = $this->displayImg->getWidth();
 315                         $width = $width_orig;
 316                         $height_orig = $this->displayImg->getHeight();
 317                         $height = $height_orig;
 318                         $mime = $this->displayImg->getMimeType();
 319                         $showLink = false;
 320                         $linkAttribs = array( 'href' => $full_url );
 321                         $longDesc = $this->displayImg->getLongDesc();
 322
 323                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this , &$wgOut ) )       ;
 324
 325                         if( $this->displayImg->allowInlineDisplay() ) {
 326                                 # image
 327
 328                                 # "Download high res version" link below the image
 329                                 #$msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 330                                 # We'll show a thumbnail of this image
 331                                 if( $width > $maxWidth || $height > $maxHeight ) {
 332                                         # Calculate the thumbnail size.
 333                                         # First case, the limiting factor is the width, not the height.
 334                                         if( $width / $height >= $maxWidth / $maxHeight ) {
 335                                                 $height = round( $height * $maxWidth / $width);
 336                                                 $width = $maxWidth;
 337                                                 # Note that $height <= $maxHeight now.
 338                                         } else {
 339                                                 $newwidth = floor( $width * $maxHeight / $height);
 340                                                 $height = round( $height * $newwidth / $width );
 341                                                 $width = $newwidth;
 342                                                 # Note that $height <= $maxHeight now, but might not be identical
 343                                                 # because of rounding.
 344                                         }
 345                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 346                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 347                                                 $wgLang->formatNum( $width ),
 348                                                 $wgLang->formatNum( $height )
 349                                         );
 350                                 } else {
 351                                         # Image is small enough to show full size on image page
 352                                         $msgbig = htmlspecialchars( $this->displayImg->getName() );
 353                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 354                                 }
 355
 356                                 $params['width'] = $width;
 357                                 $thumbnail = $this->displayImg->transform( $params );
 358
 359                                 $anchorclose = "<br />";
 360                                 if( $this->displayImg->mustRender() ) {
 361                                         $showLink = true;
 362                                 } else {
 363                                         $anchorclose .=
 364                                                 $msgsmall .
 365                                                 '<br />' . Xml::tags( 'a', $linkAttribs,  $msgbig ) . "$dirmark " . $longDesc;
 366                                 }
 367
 368                                 if( $this->displayImg->isMultipage() ) {
 369                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 370                                 }
 371
 372                                 if( $thumbnail ) {
 373                                         $options = array(
 374                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 375                                                 'file-link' => true,
 376                                         );
 377                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 378                                                 $thumbnail->toHtml( $options ) .
 379                                                 $anchorclose . '</div>' );
 380                                 }
 381
 382                                 if( $this->displayImg->isMultipage() ) {
 383                                         $count = $this->displayImg->pageCount();
 384
 385                                         if( $page > 1 ) {
 386                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 387                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page-1) );
 388                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 389                                                         array( 'page' => $page - 1 ) );
 390                                         } else {
 391                                                 $thumb1 = '';
 392                                         }
 393
 394                                         if( $page < $count ) {
 395                                                 $label = wfMsg( 'imgmultipagenext' );
 396                                                 $link = $sk->makeKnownLinkObj( $this->mTitle, $label, 'page='. ($page+1) );
 397                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 398                                                         array( 'page' => $page + 1 ) );
 399                                         } else {
 400                                                 $thumb2 = '';
 401                                         }
 402
 403                                         global $wgScript;
 404
 405                                         $formParams = array(
 406                                                 'name' => 'pageselector',
 407                                                 'action' => $wgScript,
 408                                                 'onchange' => 'document.pageselector.submit();',
 409                                         );
 410
 411                                         $option = array();
 412                                         for ( $i=1; $i <= $count; $i++ ) {
 413                                                 $options[] = Xml::option( $wgLang->formatNum($i), $i, $i == $page );
 414                                         }
 415                                         $select = Xml::tags( 'select',
 416                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 417                                                 implode( "\n", $options ) );
 418
 419                                         $wgOut->addHTML(
 420                                                 '</td><td><div class="multipageimagenavbox">' .
 421                                                 Xml::openElement( 'form', $formParams ) .
 422                                                 Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 423                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 424                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 425                                                 Xml::closeElement( 'form' ) .
 426                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 427                                         );
 428                                 }
 429                         } else {
 430                                 #if direct link is allowed but it's not a renderable image, show an icon.
 431                                 if( $this->displayImg->isSafeFile() ) {
 432                                         $icon= $this->displayImg->iconThumb();
 433
 434                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 435                                         $icon->toHtml( array( 'desc-link' => true ) ) .
 436                                         '</div>' );
 437                                 }
 438
 439                                 $showLink = true;
 440                         }
 441
 442
 443                         if($showLink) {
 444                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 445
 446                                 if( !$this->displayImg->isSafeFile() ) {
 447                                         $warning = wfMsgNoTrans( 'mediawarning' );
 448                                         $wgOut->addWikiText( <<<EOT
 449 <div class="fullMedia">
 450 <span class="dangerousLink">[[Media:$filename|$filename]]</span>$dirmark
 451 <span class="fileInfo"> $longDesc</span>
 452 </div>
 453
 454 <div class="mediaWarning">$warning</div>
 455 EOT
 456                                                 );
 457                                 } else {
 458                                         $wgOut->addWikiText( <<<EOT
 459 <div class="fullMedia">
 460 [[Media:$filename|$filename]]$dirmark <span class="fileInfo"> $longDesc</span>
 461 </div>
 462 EOT
 463                                                 );
 464                                 }
 465                         }
 466
 467                         if( !$this->displayImg->isLocal() ) {
 468                                 $this->printSharedImageText();
 469                         }
 470                 } else {
 471                         # Image does not exist
 472
 473                         $title = SpecialPage::getTitleFor( 'Upload' );
 474                         $link = $sk->makeKnownLinkObj($title, wfMsgHtml('noimage-linktext'),
 475                                 'wpDestFile=' . urlencode( $this->displayImg->getName() ) );
 476                         $wgOut->addHTML( wfMsgWikiHtml( 'noimage', $link ) );
 477                 }
 478         }
 479
 480         /**
 481          * Show a notice that the file is from a shared repository
 482          */
 483         protected function printSharedImageText() {
 484                 global $wgOut, $wgUser;
 485
 486                 $this->loadFile();
 487
 488                 $descUrl = $this->img->getDescriptionUrl();
 489                 $descText = $this->img->getDescriptionText();
 490                 $s = "<div class='sharedUploadNotice'>" . wfMsgWikiHtml( 'sharedupload' );
 491                 if( $descUrl ) {
 492                         $sk = $wgUser->getSkin();
 493                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadwiki-linktext' ) );
 494                         $msg = ( $descText ) ? 'shareduploadwiki-desc' : 'shareduploadwiki';
 495                         $msg = wfMsgExt( $msg, array( 'parseinline', 'replaceafter' ), $link );
 496                         if( $msg != '-' ) {
 497                                 # Show message only if not voided by local sysops
 498                                 $s .= $msg;
 499                         }
 500                 }
 501                 $s .= "</div>";
 502                 $wgOut->addHTML( $s );
 503
 504                 if( $descText ) {
 505                         $this->mExtraDescription = $descText;
 506                 }
 507         }
 508
 509         /*
 510          * Check for files with the same name on the foreign repos.
 511          */
 512         protected function checkSharedConflict() {
 513                 global $wgOut, $wgUser;
 514
 515                 $repoGroup = RepoGroup::singleton();
 516                 if( !$repoGroup->hasForeignRepos() ) {
 517                         return;
 518                 }
 519
 520                 $this->loadFile();
 521                 if( !$this->img->isLocal() ) {
 522                         return;
 523                 }
 524
 525                 $this->dupFile = null;
 526                 $repoGroup->forEachForeignRepo( array( $this, 'checkSharedConflictCallback' ) );
 527
 528                 if( !$this->dupFile )
 529                         return;
 530                 $dupfile = $this->dupFile;
 531                 $same = (
 532                         ($this->img->getSha1() == $dupfile->getSha1()) &&
 533                         ($this->img->getSize() == $dupfile->getSize())
 534                 );
 535
 536                 $sk = $wgUser->getSkin();
 537                 $descUrl = $dupfile->getDescriptionUrl();
 538                 if( $same ) {
 539                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadduplicate-linktext' ) );
 540                         $wgOut->addHTML( '<div id="shared-image-dup">' . wfMsgWikiHtml( 'shareduploadduplicate', $link ) . '</div>' );
 541                 } else {
 542                         $link = $sk->makeExternalLink( $descUrl, wfMsg( 'shareduploadconflict-linktext' ) );
 543                         $wgOut->addHTML( '<div id="shared-image-conflict">' . wfMsgWikiHtml( 'shareduploadconflict', $link ) . '</div>' );
 544                 }
 545         }
 546
 547         public function checkSharedConflictCallback( $repo ) {
 548                 $this->loadFile();
 549                 $dupfile = $repo->newFile( $this->img->getTitle() );
 550                 if( $dupfile && $dupfile->exists() ) {
 551                         $this->dupFile = $dupfile;
 552                         return $dupfile->exists();
 553                 }
 554                 return false;
 555         }
 556
 557         public function getUploadUrl() {
 558                 $this->loadFile();
 559                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 560                 return $uploadTitle->getFullUrl( 'wpDestFile=' . urlencode( $this->img->getName() ) . '&wpForReUpload=1' );
 561         }
 562
 563         /**
 564          * Print out the various links at the bottom of the image page, e.g. reupload,
 565          * external editing (and instructions link) etc.
 566          */
 567         protected function uploadLinksBox() {
 568                 global $wgUser, $wgOut;
 569
 570                 $this->loadFile();
 571                 if( !$this->img->isLocal() )
 572                         return;
 573
 574                 $sk = $wgUser->getSkin();
 575
 576                 $wgOut->addHTML( '<br /><ul>' );
 577
 578                 # "Upload a new version of this file" link
 579                 if( UploadForm::userCanReUpload($wgUser,$this->img->name) ) {
 580                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 581                         $wgOut->addHTML( "<li><div class='plainlinks'>{$ulink}</div></li>" );
 582                 }
 583
 584                 # Link to Special:FileDuplicateSearch
 585                 $dupeLink = $sk->makeKnownLinkObj( SpecialPage::getTitleFor( 'FileDuplicateSearch', $this->mTitle->getDBkey() ), wfMsgHtml( 'imagepage-searchdupe' ) );
 586                 $wgOut->addHTML( "<li>{$dupeLink}</li>" );
 587
 588                 # External editing link
 589                 $elink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'edit-externally' ), 'action=edit&externaledit=true&mode=file' );
 590                 $wgOut->addHTML( '<li>' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . '</small></li>' );
 591
 592                 $wgOut->addHTML( '</ul>' );
 593         }
 594
 595         protected function closeShowImage() {} # For overloading
 596
 597         /**
 598          * If the page we've just displayed is in the "Image" namespace,
 599          * we follow it with an upload history of the image and its usage.
 600          */
 601         protected function imageHistory() {
 602                 global $wgOut, $wgUseExternalEditor;
 603
 604                 $this->loadFile();
 605                 $pager = new ImageHistoryPseudoPager( $this );
 606                 $wgOut->addHTML( $pager->getBody() );
 607
 608                 $this->img->resetHistory(); // free db resources
 609
 610                 # Exist check because we don't want to show this on pages where an image
 611                 # doesn't exist along with the noimage message, that would suck. -ævar
 612                 if( $wgUseExternalEditor && $this->img->exists() ) {
 613                         $this->uploadLinksBox();
 614                 }
 615         }
 616
 617         protected function imageLinks() {
 618                 global $wgUser, $wgOut, $wgLang;
 619
 620                 $limit = 100;
 621
 622                 $dbr = wfGetDB( DB_SLAVE );
 623
 624                 $res = $dbr->select(
 625                         array( 'imagelinks', 'page' ),
 626                         array( 'page_namespace', 'page_title' ),
 627                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 628                         __METHOD__,
 629                         array( 'LIMIT' => $limit + 1)
 630                 );
 631                 $count = $dbr->numRows( $res );
 632                 if( $count == 0 ) {
 633                         $wgOut->addHTML( "<div id='mw-imagepage-nolinkstoimage'>\n" );
 634                         $wgOut->addWikiMsg( 'nolinkstoimage' );
 635                         $wgOut->addHTML( "</div>\n" );
 636                         return;
 637                 }
 638
 639                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 640                 if( $count <= $limit - 1 ) {
 641                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 642                 } else {
 643                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 644                         $wgOut->addWikiMsg( 'linkstoimage-more',
 645                                 $wgLang->formatNum( $limit ),
 646                                 $this->mTitle->getPrefixedDBkey()
 647                         );
 648                 }
 649
 650                 $wgOut->addHTML( "<ul class='mw-imagepage-linkstoimage'>\n" );
 651                 $sk = $wgUser->getSkin();
 652                 $count = 0;
 653                 while ( $s = $res->fetchObject() ) {
 654                         $count++;
 655                         if( $count <= $limit ) {
 656                                 // We have not yet reached the extra one that tells us there is more to fetch
 657                                 $name = Title::makeTitle( $s->page_namespace, $s->page_title );
 658                                 $link = $sk->makeKnownLinkObj( $name, "" );
 659                                 $wgOut->addHTML( "<li>{$link}</li>\n" );
 660                         }
 661                 }
 662                 $wgOut->addHTML( "</ul></div>\n" );
 663                 $res->free();
 664
 665                 // Add a links to [[Special:Whatlinkshere]]
 666                 if( $count > $limit )
 667                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 668         }
 669
 670         protected function imageRedirects() {
 671                 global $wgUser, $wgOut, $wgLang;
 672
 673                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 674                 if( count( $redirects ) == 0 ) return;
 675
 676                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 677                 $wgOut->addWikiMsg( 'redirectstofile',
 678                         $wgLang->formatNum( count( $redirects ) )
 679                 );
 680                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 681
 682                 $sk = $wgUser->getSkin();
 683                 foreach ( $redirects as $title ) {
 684                         $link = $sk->makeKnownLinkObj( $title, "", "redirect=no" );
 685                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 686                 }
 687                 $wgOut->addHTML( "</ul></div>\n" );
 688
 689         }
 690
 691         protected function imageDupes() {
 692                 global $wgOut, $wgUser, $wgLang;
 693
 694                 $this->loadFile();
 695
 696                 $dupes = $this->getDuplicates();
 697                 if( count( $dupes ) == 0 ) return;
 698
 699                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 700                 $wgOut->addWikiMsg( 'duplicatesoffile',
 701                         $wgLang->formatNum( count( $dupes ) )
 702                 );
 703                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 704
 705                 $sk = $wgUser->getSkin();
 706                 foreach ( $dupes as $file ) {
 707                         if( $file->isLocal() )
 708                                 $link = $sk->makeKnownLinkObj( $file->getTitle(), "" );
 709                         else {
 710                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 711                                         $file->getTitle()->getPrefixedText() );
 712                         }
 713                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 714                 }
 715                 $wgOut->addHTML( "</ul></div>\n" );
 716         }
 717
 718         /**
 719          * Delete the file, or an earlier version of it
 720          */
 721         public function delete() {
 722                 $this->loadFile();
 723                 if( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 724                         // Standard article deletion
 725                         Article::delete();
 726                         return;
 727                 }
 728                 $deleter = new FileDeleteForm( $this->img );
 729                 $deleter->execute();
 730         }
 731
 732         /**
 733          * Revert the file to an earlier version
 734          */
 735         public function revert() {
 736                 $this->loadFile();
 737                 $reverter = new FileRevertForm( $this->img );
 738                 $reverter->execute();
 739         }
 740
 741         /**
 742          * Override handling of action=purge
 743          */
 744         public function doPurge() {
 745                 $this->loadFile();
 746                 if( $this->img->exists() ) {
 747                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 748                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 749                         $update->doUpdate();
 750                         $this->img->upgradeRow();
 751                         $this->img->purgeCache();
 752                 } else {
 753                         wfDebug( "ImagePage::doPurge no image\n" );
 754                 }
 755                 parent::doPurge();
 756         }
 757
 758         /**
 759          * Display an error with a wikitext description
 760          */
 761         function showError( $description ) {
 762                 global $wgOut;
 763                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 764                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 765                 $wgOut->setArticleRelated( false );
 766                 $wgOut->enableClientCache( false );
 767                 $wgOut->addWikiText( $description );
 768         }
 769
 770 }
 771
 772 /**
 773  * Builds the image revision log shown on image pages
 774  *
 775  * @ingroup Media
 776  */
 777 class ImageHistoryList {
 778
 779         protected $imagePage, $img, $skin, $title, $repo;
 780
 781         public function __construct( $imagePage ) {
 782                 global $wgUser;
 783                 $this->skin = $wgUser->getSkin();
 784                 $this->current = $imagePage->getFile();
 785                 $this->img = $imagePage->getDisplayedFile();
 786                 $this->title = $imagePage->getTitle();
 787                 $this->imagePage = $imagePage;
 788         }
 789
 790         public function getImagePage() {
 791                 return $this->imagePage;
 792         }
 793
 794         public function getSkin() {
 795                 return $this->skin;
 796         }
 797
 798         public function getFile() {
 799                 return $this->img;
 800         }
 801
 802         public function beginImageHistoryList( $navLinks = '' ) {
 803                 global $wgOut, $wgUser;
 804                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) )
 805                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 806                         . $navLinks
 807                         . Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
 808                         . '<tr><td></td>'
 809                         . ( $this->current->isLocal() && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ? '<td></td>' : '' )
 810                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 811                         . '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>'
 812                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 813                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 814                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 815                         . "</tr>\n";
 816         }
 817
 818         public function endImageHistoryList( $navLinks = '' ) {
 819                 return "</table>\n$navLinks\n";
 820         }
 821
 822         public function imageHistoryLine( $iscur, $file ) {
 823                 global $wgUser, $wgLang, $wgContLang, $wgTitle;
 824
 825                 $timestamp = wfTimestamp(TS_MW, $file->getTimestamp());
 826                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 827                 $user = $file->getUser('id');
 828                 $usertext = $file->getUser('text');
 829                 $size = $file->getSize();
 830                 $description = $file->getDescription();
 831                 $dims = $file->getDimensionsString();
 832                 $sha1 = $file->getSha1();
 833
 834                 $local = $this->current->isLocal();
 835                 $row = $css = $selected = '';
 836
 837                 // Deletion link
 838                 if( $local && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ) {
 839                         $row .= '<td>';
 840                         # Link to remove from history
 841                         if( $wgUser->isAllowed( 'delete' ) ) {
 842                                 $q = array();
 843                                 $q[] = 'action=delete';
 844                                 if( !$iscur )
 845                                         $q[] = 'oldimage=' . urlencode( $img );
 846                                 $row .= $this->skin->makeKnownLinkObj(
 847                                         $this->title,
 848                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 849                                         implode( '&', $q )
 850                                 );
 851                         }
 852                         # Link to hide content
 853                         if( $wgUser->isAllowed( 'deleterevision' ) ) {
 854                                 if( $wgUser->isAllowed('delete') ) {
 855                                         $row .= '<br/>';
 856                                 }
 857                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 858                                 // If file is top revision or locked from this user, don't link
 859                                 if( $iscur || !$file->userCan(File::DELETED_RESTRICTED) ) {
 860                                         $del = wfMsgHtml( 'rev-delundel' );
 861                                 } else {
 862                                         // If the file was hidden, link to sha-1
 863                                         list($ts,$name) = explode('!',$img,2);
 864                                         $del = $this->skin->makeKnownLinkObj( $revdel,  wfMsg( 'rev-delundel' ),
 865                                                 'target=' . urlencode( $wgTitle->getPrefixedText() ) .
 866                                                 '&oldimage=' . urlencode( $ts ) );
 867                                         // Bolden oversighted content
 868                                         if( $file->isDeleted(File::DELETED_RESTRICTED) )
 869                                                 $del = "<strong>$del</strong>";
 870                                 }
 871                                 $row .= "<tt style='white-space: nowrap;'><small>$del</small></tt>";
 872                         }
 873                         $row .= '</td>';
 874                 }
 875
 876                 // Reversion link/current indicator
 877                 $row .= '<td>';
 878                 if( $iscur ) {
 879                         $row .= wfMsgHtml( 'filehist-current' );
 880                 } elseif( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 881                         if( $file->isDeleted(File::DELETED_FILE) ) {
 882                                 $row .= wfMsgHtml('filehist-revert');
 883                         } else {
 884                                 $q = array();
 885                                 $q[] = 'action=revert';
 886                                 $q[] = 'oldimage=' . urlencode( $img );
 887                                 $q[] = 'wpEditToken=' . urlencode( $wgUser->editToken( $img ) );
 888                                 $row .= $this->skin->makeKnownLinkObj( $this->title,
 889                                         wfMsgHtml( 'filehist-revert' ),
 890                                         implode( '&', $q ) );
 891                         }
 892                 }
 893                 $row .= '</td>';
 894
 895                 // Date/time and image link
 896                 if( $file->getTimestamp() === $this->img->getTimestamp() ) {
 897                         $selected = "class='filehistory-selected'";
 898                 }
 899                 $row .= "<td $selected style='white-space: nowrap;'>";
 900                 if( !$file->userCan(File::DELETED_FILE) ) {
 901                         # Don't link to unviewable files
 902                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 903                 } else if( $file->isDeleted(File::DELETED_FILE) ) {
 904                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 905                         # Make a link to review the image
 906                         $url = $this->skin->makeKnownLinkObj( $revdel, $wgLang->timeAndDate( $timestamp, true ),
 907                                 "target=".$wgTitle->getPrefixedText()."&file=$sha1.".$this->current->getExtension() );
 908                         $row .= '<span class="history-deleted">'.$url.'</span>';
 909                 } else {
 910                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
 911                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
 912                 }
 913
 914                 // Thumbnail
 915                 if( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
 916                         $params = array(
 917                                 'width' => '120',
 918                                 'height' => '120',
 919                         );
 920                         $thumbnail = $file->transform( $params );
 921                         $options = array(
 922                                 'alt' => wfMsg( 'filehist-thumbtext', $wgLang->timeAndDate( $timestamp, true ) ),
 923                                 'file-link' => true,
 924                         );
 925                         $row .= '</td><td>' . $thumbnail->toHtml( $options );
 926                 } else {
 927                         $row .= '</td><td>' . wfMsgHtml( 'filehist-nothumb' );
 928                 }
 929                 $row .= "</td><td>";
 930
 931                 // Image dimensions
 932                 $row .= htmlspecialchars( $dims );
 933
 934                 // File size
 935                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $size ) . ')</span>';
 936
 937                 // Uploading user
 938                 $row .= '</td><td>';
 939                 if( $local ) {
 940                         // Hide deleted usernames
 941                         if( $file->isDeleted(File::DELETED_USER) ) {
 942                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 943                         } else {
 944                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
 945                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
 946                         }
 947                 } else {
 948                         $row .= htmlspecialchars( $usertext );
 949                 }
 950                 $row .= '</td><td>';
 951
 952                 // Don't show deleted descriptions
 953                 if( $file->isDeleted(File::DELETED_COMMENT) ) {
 954                         $row .= '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 955                 } else {
 956                         $row .= $this->skin->commentBlock( $description, $this->title );
 957                 }
 958                 $row .= '</td>';
 959
 960                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
 961                 $classAttr = $rowClass ? " class='$rowClass'" : "";
 962
 963                 return "<tr{$classAttr}>{$row}</tr>\n";
 964         }
 965 }
 966
 967 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
 968         function __construct( $imagePage ) {
 969                 parent::__construct();
 970                 $this->mImagePage = $imagePage;
 971                 $this->mTitle = clone( $imagePage->getTitle() );
 972                 $this->mTitle->setFragment( '#filehistory' );
 973                 $this->mImg = NULL;
 974                 $this->mHist = array();
 975                 $this->mRange = array( 0, 0 ); // display range
 976         }
 977
 978         function getTitle() {
 979                 return $this->mTitle;
 980         }
 981
 982         function getQueryInfo() {
 983                 return false;
 984         }
 985
 986         function getIndexField() {
 987                 return '';
 988         }
 989
 990         function formatRow( $row ) {
 991                 return '';
 992         }
 993
 994         function getBody() {
 995                 $s = '';
 996                 $this->doQuery();
 997                 if( count($this->mHist) ) {
 998                         $list = new ImageHistoryList( $this->mImagePage );
 999                         # Generate prev/next links
1000                         $navLink = $this->getNavigationBar();
1001                         $s = $list->beginImageHistoryList($navLink);
1002                         // Skip rows there just for paging links
1003                         for( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1004                                 $file = $this->mHist[$i];
1005                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1006                         }
1007                         $s .= $list->endImageHistoryList($navLink);
1008                 }
1009                 return $s;
1010         }
1011
1012         function doQuery() {
1013                 if( $this->mQueryDone ) return;
1014                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1015                 if( !$this->mImg->exists() ) {
1016                         return;
1017                 }
1018                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1019                 if( $this->mIsBackwards ) {
1020                         // Fetch the file history
1021                         $this->mHist = $this->mImg->getHistory($queryLimit,null,$this->mOffset,false);
1022                         // The current rev may not meet the offset/limit
1023                         $numRows = count($this->mHist);
1024                         if( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1025                                 $this->mHist = array_merge( array($this->mImg), $this->mHist );
1026                         }
1027                 } else {
1028                         // The current rev may not meet the offset
1029                         if( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1030                                 $this->mHist[] = $this->mImg;
1031                         }
1032                         // Old image versions (fetch extra row for nav links)
1033                         $oiLimit = count($this->mHist) ? $this->mLimit : $this->mLimit+1;
1034                         // Fetch the file history
1035                         $this->mHist = array_merge( $this->mHist,
1036                                 $this->mImg->getHistory($oiLimit,$this->mOffset,null,false) );
1037                 }
1038                 $numRows = count($this->mHist); // Total number of query results
1039                 if( $numRows ) {
1040                         # Index value of top item in the list
1041                         $firstIndex = $this->mIsBackwards ?
1042                                 $this->mHist[$numRows-1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1043                         # Discard the extra result row if there is one
1044                         if( $numRows > $this->mLimit && $numRows > 1 ) {
1045                                 if( $this->mIsBackwards ) {
1046                                         # Index value of item past the index
1047                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1048                                         # Index value of bottom item in the list
1049                                         $lastIndex = $this->mHist[1]->getTimestamp();
1050                                         # Display range
1051                                         $this->mRange = array( 1, $numRows-1 );
1052                                 } else {
1053                                         # Index value of item past the index
1054                                         $this->mPastTheEndIndex = $this->mHist[$numRows-1]->getTimestamp();
1055                                         # Index value of bottom item in the list
1056                                         $lastIndex = $this->mHist[$numRows-2]->getTimestamp();
1057                                         # Display range
1058                                         $this->mRange = array( 0, $numRows-2 );
1059                                 }
1060                         } else {
1061                                 # Setting indexes to an empty string means that they will be
1062                                 # omitted if they would otherwise appear in URLs. It just so
1063                                 # happens that this  is the right thing to do in the standard
1064                                 # UI, in all the relevant cases.
1065                                 $this->mPastTheEndIndex = '';
1066                                 # Index value of bottom item in the list
1067                                 $lastIndex = $this->mIsBackwards ?
1068                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows-1]->getTimestamp();
1069                                 # Display range
1070                                 $this->mRange = array( 0, $numRows-1 );
1071                         }
1072                 } else {
1073                         $firstIndex = '';
1074                         $lastIndex = '';
1075                         $this->mPastTheEndIndex = '';
1076                 }
1077                 if( $this->mIsBackwards ) {
1078                         $this->mIsFirst = ( $numRows < $queryLimit );
1079                         $this->mIsLast = ( $this->mOffset == '' );
1080                         $this->mLastShown = $firstIndex;
1081                         $this->mFirstShown = $lastIndex;
1082                 } else {
1083                         $this->mIsFirst = ( $this->mOffset == '' );
1084                         $this->mIsLast = ( $numRows < $queryLimit );
1085                         $this->mLastShown = $lastIndex;
1086                         $this->mFirstShown = $firstIndex;
1087                 }
1088                 $this->mQueryDone = true;
1089         }
1090 }