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