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