includes/Linker.php

   1 <?php
   2 /**
   3  * Split off some of the internal bits from Skin.php.
   4  * These functions are used for primarily page content:
   5  * links, embedded images, table of contents. Links are
   6  * also used in the skin.
   7  * @package MediaWiki
   8  */
   9
  10 /**
  11  * For the moment, Skin is a descendent class of Linker.
  12  * In the future, it should probably be further split
  13  * so that ever other bit of the wiki doesn't have to
  14  * go loading up Skin to get at it.
  15  *
  16  * @package MediaWiki
  17  */
  18 class Linker {
  19
  20         function Linker() {}
  21
  22         /**
  23          * @deprecated
  24          */
  25         function postParseLinkColour( $s = NULL ) {
  26                 return NULL;
  27         }
  28
  29         /** @todo document */
  30         function getExternalLinkAttributes( $link, $text, $class='' ) {
  31                 global $wgContLang;
  32
  33                 $same = ($link == $text);
  34                 $link = urldecode( $link );
  35                 $link = $wgContLang->checkTitleEncoding( $link );
  36                 $link = preg_replace( '/[\\x00-\\x1f]/', ' ', $link );
  37                 $link = htmlspecialchars( $link );
  38
  39                 $r = ($class != '') ? " class='$class'" : " class='external'";
  40
  41                 $r .= " title=\"{$link}\"";
  42                 return $r;
  43         }
  44
  45         /** @todo document */
  46         function getInternalLinkAttributes( $link, $text, $broken = false ) {
  47                 $link = urldecode( $link );
  48                 $link = str_replace( '_', ' ', $link );
  49                 $link = htmlspecialchars( $link );
  50
  51                 if( $broken == 'stub' ) {
  52                         $r = ' class="stub"';
  53                 } else if ( $broken == 'yes' ) {
  54                         $r = ' class="new"';
  55                 } else {
  56                         $r = '';
  57                 }
  58
  59                 $r .= " title=\"{$link}\"";
  60                 return $r;
  61         }
  62
  63         /**
  64          * @param bool $broken
  65          */
  66         function getInternalLinkAttributesObj( &$nt, $text, $broken = false ) {
  67                 if( $broken == 'stub' ) {
  68                         $r = ' class="stub"';
  69                 } else if ( $broken == 'yes' ) {
  70                         $r = ' class="new"';
  71                 } else {
  72                         $r = '';
  73                 }
  74
  75                 $r .= ' title="' . $nt->getEscapedText() . '"';
  76                 return $r;
  77         }
  78
  79         /**
  80          * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
  81          * it if you already have a title object handy. See makeLinkObj for further documentation.
  82          *
  83          * @param string $title The text of the title
  84          * @param string $text Link text
  85          * @param string $query Optional query part
  86          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
  87          *                      be included in the link text. Other characters will be appended after
  88          *                      the end of the link.
  89          */
  90         function makeLink( $title, $text = '', $query = '', $trail = '' ) {
  91                 wfProfileIn( 'Linker::makeLink' );
  92                 $nt = Title::newFromText( $title );
  93                 if ($nt) {
  94                         $result = $this->makeLinkObj( Title::newFromText( $title ), $text, $query, $trail );
  95                 } else {
  96                         wfDebug( 'Invalid title passed to Linker::makeLink(): "'.$title."\"\n" );
  97                         $result = $text == "" ? $title : $text;
  98                 }
  99
 100                 wfProfileOut( 'Linker::makeLink' );
 101                 return $result;
 102         }
 103
 104         /**
 105          * This function is a shortcut to makeKnownLinkObj(Title::newFromText($title),...). Do not call
 106          * it if you already have a title object handy. See makeKnownLinkObj for further documentation.
 107          *
 108          * @param string $title The text of the title
 109          * @param string $text Link text
 110          * @param string $query Optional query part
 111          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 112          *                      be included in the link text. Other characters will be appended after
 113          *                      the end of the link.
 114          */
 115         function makeKnownLink( $title, $text = '', $query = '', $trail = '', $prefix = '',$aprops = '') {
 116                 $nt = Title::newFromText( $title );
 117                 if ($nt) {
 118                         return $this->makeKnownLinkObj( Title::newFromText( $title ), $text, $query, $trail, $prefix , $aprops );
 119                 } else {
 120                         wfDebug( 'Invalid title passed to Linker::makeKnownLink(): "'.$title."\"\n" );
 121                         return $text == '' ? $title : $text;
 122                 }
 123         }
 124
 125         /**
 126          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
 127          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
 128          *
 129          * @param string $title The text of the title
 130          * @param string $text Link text
 131          * @param string $query Optional query part
 132          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 133          *                      be included in the link text. Other characters will be appended after
 134          *                      the end of the link.
 135          */
 136         function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
 137                 $nt = Title::newFromText( $title );
 138                 if ($nt) {
 139                         return $this->makeBrokenLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 140                 } else {
 141                         wfDebug( 'Invalid title passed to Linker::makeBrokenLink(): "'.$title."\"\n" );
 142                         return $text == '' ? $title : $text;
 143                 }
 144         }
 145
 146         /**
 147          * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
 148          * it if you already have a title object handy. See makeStubLinkObj for further documentation.
 149          *
 150          * @param string $title The text of the title
 151          * @param string $text Link text
 152          * @param string $query Optional query part
 153          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 154          *                      be included in the link text. Other characters will be appended after
 155          *                      the end of the link.
 156          */
 157         function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
 158                 $nt = Title::newFromText( $title );
 159                 if ($nt) {
 160                         return $this->makeStubLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 161                 } else {
 162                         wfDebug( 'Invalid title passed to Linker::makeStubLink(): "'.$title."\"\n" );
 163                         return $text == '' ? $title : $text;
 164                 }
 165         }
 166
 167         /**
 168          * Make a link for a title which may or may not be in the database. If you need to
 169          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
 170          * call to this will result in a DB query.
 171          *
 172          * @param string $title The text of the title
 173          * @param string $text Link text
 174          * @param string $query Optional query part
 175          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 176          *                      be included in the link text. Other characters will be appended after
 177          *                      the end of the link.
 178          */
 179         function makeLinkObj( $nt, $text= '', $query = '', $trail = '', $prefix = '' ) {
 180                 global $wgUser;
 181                 $fname = 'Linker::makeLinkObj';
 182                 wfProfileIn( $fname );
 183
 184                 # Fail gracefully
 185                 if ( ! is_object($nt) ) {
 186                         # wfDebugDieBacktrace();
 187                         wfProfileOut( $fname );
 188                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 189                 }
 190
 191                 $ns = $nt->getNamespace();
 192                 $dbkey = $nt->getDBkey();
 193                 if ( $nt->isExternal() ) {
 194                         $u = $nt->getFullURL();
 195                         $link = $nt->getPrefixedURL();
 196                         if ( '' == $text ) { $text = $nt->getPrefixedText(); }
 197                         $style = $this->getExternalLinkAttributes( $link, $text, 'extiw' );
 198
 199                         $inside = '';
 200                         if ( '' != $trail ) {
 201                                 if ( preg_match( '/^([a-z]+)(.*)$$/sD', $trail, $m ) ) {
 202                                         $inside = $m[1];
 203                                         $trail = $m[2];
 204                                 }
 205                         }
 206
 207                         # Check for anchors, normalize the anchor
 208
 209                         $parts = explode( '#', $u, 2 );
 210                         if ( count( $parts ) == 2 ) {
 211                                 $anchor = urlencode( Sanitizer::decodeCharReferences( str_replace(' ', '_', $parts[1] ) ) );
 212                                 $replacearray = array(
 213                                         '%3A' => ':',
 214                                         '%' => '.'
 215                                 );
 216                                 $u = $parts[0] . '#' .
 217                                      str_replace( array_keys( $replacearray ),
 218                                                  array_values( $replacearray ),
 219                                                  $anchor );
 220                         }
 221
 222                         $t = "<a href=\"{$u}\"{$style}>{$text}{$inside}</a>";
 223
 224                         wfProfileOut( $fname );
 225                         return $t;
 226                 } elseif ( $nt->isAlwaysKnown() ) {
 227                         # Image links, special page links and self-links with fragements are always known.
 228                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 229                 } else {
 230                         wfProfileIn( $fname.'-immediate' );
 231                         # Work out link colour immediately
 232                         $aid = $nt->getArticleID() ;
 233                         if ( 0 == $aid ) {
 234                                 $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 235                         } else {
 236                                 $threshold = $wgUser->getOption('stubthreshold') ;
 237                                 if ( $threshold > 0 ) {
 238                                         $dbr =& wfGetDB( DB_SLAVE );
 239                                         $s = $dbr->selectRow(
 240                                                 array( 'page' ),
 241                                                 array( 'page_len',
 242                                                         'page_namespace',
 243                                                         'page_is_redirect' ),
 244                                                 array( 'page_id' => $aid ), $fname ) ;
 245                                         if ( $s !== false ) {
 246                                                 $size = $s->page_len;
 247                                                 if ( $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
 248                                                         $size = $threshold*2 ; # Really big
 249                                                 }
 250                                         } else {
 251                                                 $size = $threshold*2 ; # Really big
 252                                         }
 253                                 } else {
 254                                         $size = 1 ;
 255                                 }
 256                                 if ( $size < $threshold ) {
 257                                         $retVal = $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 258                                 } else {
 259                                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 260                                 }
 261                         }
 262                         wfProfileOut( $fname.'-immediate' );
 263                 }
 264                 wfProfileOut( $fname );
 265                 return $retVal;
 266         }
 267
 268         /**
 269          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
 270          * it doesn't have to do a database query. It's also valid for interwiki titles and special
 271          * pages.
 272          *
 273          * @param object Title of target page
 274          * @param string Text to replace the title
 275          * @param string Link target
 276          * @param string Text after link
 277          * @param string Text before link text
 278          * @param string Extra attributes to the a-element
 279          * @return the a-element
 280          */
 281         function makeKnownLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '' ) {
 282
 283                 $fname = 'Linker::makeKnownLinkObj';
 284                 wfProfileIn( $fname );
 285
 286                 if ( !is_object( $nt ) ) {
 287                         wfProfileOut( $fname );
 288                         return $text;
 289                 }
 290
 291                 $u = $nt->escapeLocalURL( $query );
 292                 if ( '' != $nt->getFragment() ) {
 293                         if( $nt->getPrefixedDbkey() == '' ) {
 294                                 $u = '';
 295                                 if ( '' == $text ) {
 296                                         $text = htmlspecialchars( $nt->getFragment() );
 297                                 }
 298                         }
 299                         $anchor = urlencode( Sanitizer::decodeCharReferences( str_replace( ' ', '_', $nt->getFragment() ) ) );
 300                         $replacearray = array(
 301                                 '%3A' => ':',
 302                                 '%' => '.'
 303                         );
 304                         $u .= '#' . str_replace(array_keys($replacearray),array_values($replacearray),$anchor);
 305                 }
 306                 if ( '' == $text ) {
 307                         $text = htmlspecialchars( $nt->getPrefixedText() );
 308                 }
 309                 $style = $this->getInternalLinkAttributesObj( $nt, $text );
 310
 311                 if ( $aprops !== '' ) $aprops = ' ' . $aprops;
 312
 313                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 314                 $r = "<a href=\"{$u}\"{$style}{$aprops}>{$prefix}{$text}{$inside}</a>{$trail}";
 315                 wfProfileOut( $fname );
 316                 return $r;
 317         }
 318
 319         /**
 320          * Make a red link to the edit page of a given title.
 321          *
 322          * @param string $title The text of the title
 323          * @param string $text Link text
 324          * @param string $query Optional query part
 325          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 326          *                      be included in the link text. Other characters will be appended after
 327          *                      the end of the link.
 328          */
 329         function makeBrokenLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 330                 # Fail gracefully
 331                 if ( ! isset($nt) ) {
 332                         # wfDebugDieBacktrace();
 333                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 334                 }
 335
 336                 $fname = 'Linker::makeBrokenLinkObj';
 337                 wfProfileIn( $fname );
 338
 339                 if ( '' == $query ) {
 340                         $q = 'action=edit';
 341                 } else {
 342                         $q = 'action=edit&'.$query;
 343                 }
 344                 $u = $nt->escapeLocalURL( $q );
 345
 346                 if ( '' == $text ) {
 347                         $text = htmlspecialchars( $nt->getPrefixedText() );
 348                 }
 349                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 350
 351                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 352                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 353
 354                 wfProfileOut( $fname );
 355                 return $s;
 356         }
 357
 358         /**
 359          * Make a brown link to a short article.
 360          *
 361          * @param string $title The text of the title
 362          * @param string $text Link text
 363          * @param string $query Optional query part
 364          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 365          *                      be included in the link text. Other characters will be appended after
 366          *                      the end of the link.
 367          */
 368         function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 369                 $link = $nt->getPrefixedURL();
 370
 371                 $u = $nt->escapeLocalURL( $query );
 372
 373                 if ( '' == $text ) {
 374                         $text = htmlspecialchars( $nt->getPrefixedText() );
 375                 }
 376                 $style = $this->getInternalLinkAttributesObj( $nt, $text, 'stub' );
 377
 378                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 379                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 380                 return $s;
 381         }
 382
 383         /**
 384          * Generate either a normal exists-style link or a stub link, depending
 385          * on the given page size.
 386          *
 387          * @param int $size
 388          * @param Title $nt
 389          * @param string $text
 390          * @param string $query
 391          * @param string $trail
 392          * @param string $prefix
 393          * @return string HTML of link
 394          */
 395         function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 396                 global $wgUser;
 397                 $threshold = intval( $wgUser->getOption( 'stubthreshold' ) );
 398                 if( $size < $threshold ) {
 399                         return $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 400                 } else {
 401                         return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 402                 }
 403         }
 404
 405         /**
 406          * Make appropriate markup for a link to the current article. This is currently rendered
 407          * as the bold link text. The calling sequence is the same as the other make*LinkObj functions,
 408          * despite $query not being used.
 409          */
 410         function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 411                 if ( '' == $text ) {
 412                         $text = htmlspecialchars( $nt->getPrefixedText() );
 413                 }
 414                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 415                 return "<strong>{$prefix}{$text}{$inside}</strong>{$trail}";
 416         }
 417
 418         /** @todo document */
 419         function fnamePart( $url ) {
 420                 $basename = strrchr( $url, '/' );
 421                 if ( false === $basename ) {
 422                         $basename = $url;
 423                 } else {
 424                         $basename = substr( $basename, 1 );
 425                 }
 426                 return htmlspecialchars( $basename );
 427         }
 428
 429         /** Obsolete alias */
 430         function makeImage( $url, $alt = '' ) {
 431                 return $this->makeExternalImage( $url, $alt );
 432         }
 433
 434         /** @todo document */
 435         function makeExternalImage( $url, $alt = '' ) {
 436                 if ( '' == $alt ) {
 437                         $alt = $this->fnamePart( $url );
 438                 }
 439                 $s = '<img src="'.$url.'" alt="'.$alt.'" />';
 440                 return $s;
 441         }
 442
 443         /** @todo document */
 444         function makeImageLinkObj( $nt, $label, $alt, $align = '', $width = false, $height = false, $framed = false,
 445           $thumb = false, $manual_thumb = '' )
 446         {
 447                 global $wgContLang, $wgUser, $wgThumbLimits;
 448
 449                 $img   = new Image( $nt );
 450                 if ( !$img->allowInlineDisplay() && $img->exists() ) {
 451                         return $this->makeKnownLinkObj( $nt );
 452                 }
 453
 454                 $url   = $img->getViewURL();
 455                 $error = $prefix = $postfix = '';
 456
 457                 wfDebug( "makeImageLinkObj: '$width'x'$height'\n" );
 458
 459                 if ( 'center' == $align )
 460                 {
 461                         $prefix  = '<div class="center">';
 462                         $postfix = '</div>';
 463                         $align   = 'none';
 464                 }
 465
 466                 if ( $thumb || $framed ) {
 467
 468                         # Create a thumbnail. Alignment depends on language
 469                         # writing direction, # right aligned for left-to-right-
 470                         # languages ("Western languages"), left-aligned
 471                         # for right-to-left-languages ("Semitic languages")
 472                         #
 473                         # If  thumbnail width has not been provided, it is set
 474                         # to the default user option as specified in Language*.php
 475                         if ( $align == '' ) {
 476                                 $align = $wgContLang->isRTL() ? 'left' : 'right';
 477                         }
 478
 479
 480                         if ( $width === false ) {
 481                                 $wopt = $wgUser->getOption( 'thumbsize' );
 482
 483                                 if( !isset( $wgThumbLimits[$wopt] ) ) {
 484                                          $wopt = User::getDefaultOption( 'thumbsize' );
 485                                 }
 486
 487                                 $width = min( $img->getWidth(), $wgThumbLimits[$wopt] );
 488                         }
 489
 490                         return $prefix.$this->makeThumbLinkObj( $img, $label, $alt, $align, $width, $height, $framed, $manual_thumb ).$postfix;
 491                 }
 492
 493                 if ( $width && $img->exists() ) {
 494
 495                         # Create a resized image, without the additional thumbnail
 496                         # features
 497
 498                         if ( $height == false )
 499                                 $height = -1;
 500                         if ( $manual_thumb == '') {
 501                                 $thumb = $img->getThumbnail( $width, $height );
 502                                 if ( $thumb ) {
 503                                         // In most cases, $width = $thumb->width or $height = $thumb->height.
 504                                         // If not, we're scaling the image larger than it can be scaled,
 505                                         // so we send to the browser a smaller thumbnail, and let the client do the scaling.
 506
 507                                         if ($height != -1 && $width > $thumb->width * $height / $thumb->height) {
 508                                                 // $height is the limiting factor, not $width
 509                                                 // set $width to the largest it can be, such that the resulting
 510                                                 // scaled height is at most $height
 511                                                 $width = floor($thumb->width * $height / $thumb->height);
 512                                         }
 513                                         $height = round($thumb->height * $width / $thumb->width);
 514
 515                                         wfDebug( "makeImageLinkObj: client-size set to '$width x $height'\n" );
 516                                         $url = $thumb->getUrl();
 517                                 } else {
 518                                         $error = htmlspecialchars( $img->getLastError() );
 519                                 }
 520                         }
 521                 } else {
 522                         $width = $img->width;
 523                         $height = $img->height;
 524                 }
 525
 526                 wfDebug( "makeImageLinkObj2: '$width'x'$height'\n" );
 527                 $u = $nt->escapeLocalURL();
 528                 if ( $error ) {
 529                         $s = $error;
 530                 } elseif ( $url == '' ) {
 531                         $s = $this->makeBrokenImageLinkObj( $img->getTitle() );
 532                         //$s .= "<br />{$alt}<br />{$url}<br />\n";
 533                 } else {
 534                         $s = '<a href="'.$u.'" class="image" title="'.$alt.'">' .
 535                                  '<img src="'.$url.'" alt="'.$alt.'" ' .
 536                                  ( $width
 537                                         ? ( 'width="'.$width.'" height="'.$height.'" ' )
 538                                         : '' ) .
 539                                  'longdesc="'.$u.'" /></a>';
 540                 }
 541                 if ( '' != $align ) {
 542                         $s = "<div class=\"float{$align}\"><span>{$s}</span></div>";
 543                 }
 544                 return str_replace("\n", ' ',$prefix.$s.$postfix);
 545         }
 546
 547         /**
 548          * Make HTML for a thumbnail including image, border and caption
 549          * $img is an Image object
 550          */
 551         function makeThumbLinkObj( $img, $label = '', $alt, $align = 'right', $boxwidth = 180, $boxheight=false, $framed=false , $manual_thumb = "" ) {
 552                 global $wgStylePath, $wgContLang;
 553                 $url  = $img->getViewURL();
 554                 $thumbUrl = '';
 555                 $error = '';
 556
 557                 $width = $height = 0;
 558                 if ( $img->exists() ) {
 559                         $width  = $img->getWidth();
 560                         $height = $img->getHeight();
 561                 }
 562                 if ( 0 == $width || 0 == $height ) {
 563                         $width = $height = 200;
 564                 }
 565                 if ( $boxwidth == 0 ) {
 566                         $boxwidth = 200;
 567                 }
 568                 if ( $framed ) {
 569                         // Use image dimensions, don't scale
 570                         $boxwidth  = $width;
 571                         $boxheight = $height;
 572                         $thumbUrl  = $url;
 573                 } else {
 574                         if ( $boxheight === false )
 575                                 $boxheight = -1;
 576                         if ( '' == $manual_thumb ) {
 577                                 $thumb = $img->getThumbnail( $boxwidth, $boxheight );
 578                                 if ( $thumb ) {
 579                                         $thumbUrl = $thumb->getUrl();
 580                                         $boxwidth = $thumb->width;
 581                                         $boxheight = $thumb->height;
 582                                 } else {
 583                                         $error = $img->getLastError();
 584                                 }
 585                         }
 586                 }
 587                 $oboxwidth = $boxwidth + 2;
 588
 589                 if ( $manual_thumb != '' ) # Use manually specified thumbnail
 590                 {
 591                         $manual_title = Title::makeTitleSafe( NS_IMAGE, $manual_thumb ); #new Title ( $manual_thumb ) ;
 592                         $manual_img = new Image( $manual_title );
 593                         $thumbUrl = $manual_img->getViewURL();
 594                         if ( $manual_img->exists() )
 595                         {
 596                                 $width  = $manual_img->getWidth();
 597                                 $height = $manual_img->getHeight();
 598                                 $boxwidth = $width ;
 599                                 $boxheight = $height ;
 600                                 $oboxwidth = $boxwidth + 2 ;
 601                         }
 602                 }
 603
 604                 $u = $img->getEscapeLocalURL();
 605
 606                 $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
 607                 $magnifyalign = $wgContLang->isRTL() ? 'left' : 'right';
 608                 $textalign = $wgContLang->isRTL() ? ' style="text-align:right"' : '';
 609
 610                 $s = "<div class=\"thumb t{$align}\"><div style=\"width:{$oboxwidth}px;\">";
 611                 if( $thumbUrl == '' ) {
 612                         // Couldn't generate thumbnail? Scale the image client-side.
 613                         $thumbUrl = $url;
 614                 }
 615                 if ( $error ) {
 616                         $s .= htmlspecialchars( $error );
 617                         $zoomicon = '';
 618                 } elseif( !$img->exists() ) {
 619                         $s .= $this->makeBrokenImageLinkObj( $img->getTitle() );
 620                         $zoomicon = '';
 621                 } else {
 622                         $s .= '<a href="'.$u.'" class="internal" title="'.$alt.'">'.
 623                                 '<img src="'.$thumbUrl.'" alt="'.$alt.'" ' .
 624                                 'width="'.$boxwidth.'" height="'.$boxheight.'" ' .
 625                                 'longdesc="'.$u.'" /></a>';
 626                         if ( $framed ) {
 627                                 $zoomicon="";
 628                         } else {
 629                                 $zoomicon =  '<div class="magnify" style="float:'.$magnifyalign.'">'.
 630                                         '<a href="'.$u.'" class="internal" title="'.$more.'">'.
 631                                         '<img src="'.$wgStylePath.'/common/images/magnify-clip.png" ' .
 632                                         'width="15" height="11" alt="'.$more.'" /></a></div>';
 633                         }
 634                 }
 635                 $s .= '  <div class="thumbcaption" '.$textalign.'>'.$zoomicon.$label."</div></div></div>";
 636                 return str_replace("\n", ' ', $s);
 637         }
 638
 639         /**
 640          * Pass a title object, not a title string
 641          */
 642         function makeBrokenImageLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 643                 # Fail gracefully
 644                 if ( ! isset($nt) ) {
 645                         # wfDebugDieBacktrace();
 646                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 647                 }
 648
 649                 $fname = 'Linker::makeBrokenImageLinkObj';
 650                 wfProfileIn( $fname );
 651
 652                 $q = 'wpDestFile=' . urlencode( $nt->getDBkey() );
 653                 if ( '' != $query ) {
 654                         $q .= "&$query";
 655                 }
 656                 $uploadTitle = Title::makeTitle( NS_SPECIAL, 'Upload' );
 657                 $url = $uploadTitle->escapeLocalURL( $q );
 658
 659                 if ( '' == $text ) {
 660                         $text = htmlspecialchars( $nt->getPrefixedText() );
 661                 }
 662                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 663                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 664                 $s = "<a href=\"{$url}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 665
 666                 wfProfileOut( $fname );
 667                 return $s;
 668         }
 669
 670         /** @todo document */
 671         function makeMediaLink( $name, /* wtf?! */ $url, $alt = '' ) {
 672                 $nt = Title::makeTitleSafe( NS_IMAGE, $name );
 673                 return $this->makeMediaLinkObj( $nt, $alt );
 674         }
 675
 676         /**
 677          * Create a direct link to a given uploaded file.
 678          *
 679          * @param Title  $title
 680          * @param string $text   pre-sanitized HTML
 681          * @param bool   $nourl  Mask absolute URLs, so the parser doesn't
 682          *                       linkify them (it is currently not context-aware)
 683          * @return string HTML
 684          *
 685          * @access public
 686          * @todo Handle invalid or missing images better.
 687          */
 688         function makeMediaLinkObj( $title, $text = '' ) {
 689                 if( is_null( $title ) ) {
 690                         ### HOTFIX. Instead of breaking, return empty string.
 691                         return $text;
 692                 } else {
 693                         $name = $title->getDBKey();
 694                         $img  = new Image( $title );
 695                         if( $img->exists() ) {
 696                                 $url  = $img->getURL();
 697                                 $class = 'internal';
 698                         } else {
 699                                 $upload = Title::makeTitle( NS_SPECIAL, 'Upload' );
 700                                 $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $img->getName() ) );
 701                                 $class = 'new';
 702                         }
 703                         $alt = htmlspecialchars( $title->getText() );
 704                         if( $text == '' ) {
 705                                 $text = $alt;
 706                         }
 707                         $u = htmlspecialchars( $url );
 708                         return "<a href=\"{$u}\" class='$class' title=\"{$alt}\">{$text}</a>";
 709                 }
 710         }
 711
 712         /** @todo document */
 713         function specialLink( $name, $key = '' ) {
 714                 global $wgContLang;
 715
 716                 if ( '' == $key ) { $key = strtolower( $name ); }
 717                 $pn = $wgContLang->ucfirst( $name );
 718                 return $this->makeKnownLink( $wgContLang->specialPage( $pn ),
 719                   wfMsg( $key ) );
 720         }
 721
 722         /** @todo document */
 723         function makeExternalLink( $url, $text, $escape = true, $linktype = '' ) {
 724                 $style = $this->getExternalLinkAttributes( $url, $text, 'external ' . $linktype );
 725                 global $wgNoFollowLinks;
 726                 if( $wgNoFollowLinks ) {
 727                         $style .= ' rel="nofollow"';
 728                 }
 729                 $url = htmlspecialchars( $url );
 730                 if( $escape ) {
 731                         $text = htmlspecialchars( $text );
 732                 }
 733                 return '<a href="'.$url.'"'.$style.'>'.$text.'</a>';
 734         }
 735
 736         /**
 737          * This function is called by all recent changes variants, by the page history,
 738          * and by the user contributions list. It is responsible for formatting edit
 739          * comments. It escapes any HTML in the comment, but adds some CSS to format
 740          * auto-generated comments (from section editing) and formats [[wikilinks]].
 741          *
 742          * The $title parameter must be a title OBJECT. It is used to generate a
 743          * direct link to the section in the autocomment.
 744          * @author Erik Moeller <moeller@scireview.de>
 745          *
 746          * Note: there's not always a title to pass to this function.
 747          * Since you can't set a default parameter for a reference, I've turned it
 748          * temporarily to a value pass. Should be adjusted further. --brion
 749          */
 750         function formatComment($comment, $title = NULL) {
 751                 $fname = 'Linker::formatComment';
 752                 wfProfileIn( $fname );
 753
 754                 global $wgContLang;
 755                 $comment = str_replace( "\n", " ", $comment );
 756                 $comment = htmlspecialchars( $comment );
 757
 758                 # The pattern for autogen comments is / * foo * /, which makes for
 759                 # some nasty regex.
 760                 # We look for all comments, match any text before and after the comment,
 761                 # add a separator where needed and format the comment itself with CSS
 762                 while (preg_match('/(.*)\/\*\s*(.*?)\s*\*\/(.*)/', $comment,$match)) {
 763                         $pre=$match[1];
 764                         $auto=$match[2];
 765                         $post=$match[3];
 766                         $link='';
 767                         if( $title ) {
 768                                 $section = $auto;
 769
 770                                 # This is hackish but should work in most cases.
 771                                 $section = str_replace( '[[', '', $section );
 772                                 $section = str_replace( ']]', '', $section );
 773                                 $sectionTitle = wfClone( $title );
 774                                 $sectionTitle->mFragment = $section;
 775                                 $link = $this->makeKnownLinkObj( $sectionTitle, wfMsg( 'sectionlink' ) );
 776                         }
 777                         $sep='-';
 778                         $auto=$link.$auto;
 779                         if($pre) { $auto = $sep.' '.$auto; }
 780                         if($post) { $auto .= ' '.$sep; }
 781                         $auto='<span class="autocomment">'.$auto.'</span>';
 782                         $comment=$pre.$auto.$post;
 783                 }
 784
 785                 # format regular and media links - all other wiki formatting
 786                 # is ignored
 787                 $medians = $wgContLang->getNsText( NS_MEDIA ) . ':';
 788                 while(preg_match('/\[\[(.*?)(\|(.*?))*\]\](.*)$/',$comment,$match)) {
 789                         # Handle link renaming [[foo|text]] will show link as "text"
 790                         if( "" != $match[3] ) {
 791                                 $text = $match[3];
 792                         } else {
 793                                 $text = $match[1];
 794                         }
 795                         if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
 796                                 # Media link; trail not supported.
 797                                 $linkRegexp = '/\[\[(.*?)\]\]/';
 798                                 $thelink = $this->makeMediaLink( $submatch[1], "", $text );
 799                         } else {
 800                                 # Other kind of link
 801                                 if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
 802                                         $trail = $submatch[1];
 803                                 } else {
 804                                         $trail = "";
 805                                 }
 806                                 $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
 807                                 if ($match[1][0] == ':')
 808                                         $match[1] = substr($match[1], 1);
 809                                 $thelink = $this->makeLink( $match[1], $text, "", $trail );
 810                         }
 811                         $comment = preg_replace( $linkRegexp, wfRegexReplacement( $thelink ), $comment, 1 );
 812                 }
 813                 wfProfileOut( $fname );
 814                 return $comment;
 815         }
 816
 817         /**
 818          * Wrap a comment in standard punctuation and formatting if
 819          * it's non-empty, otherwise return empty string.
 820          *
 821          * @param string $comment
 822          * @param Title $title
 823          * @param bool $deleted
 824          *
 825          * @return string
 826          */
 827         function commentBlock( $comment, $title = NULL, $deleted = false ) {
 828                 // '*' used to be the comment inserted by the software way back
 829                 // in antiquity in case none was provided, here for backwards
 830                 // compatability, acc. to brion -ævar
 831                 if( $comment == '' || $comment == '*' ) {
 832                         return '';
 833                 } else {
 834                         if ( $deleted )
 835                                 return " <span class='comment'>(...)</span>";
 836                         else {
 837                                 $formatted = $this->formatComment( $comment, $title );
 838                                 return " <span class='comment'>($formatted)</span>";
 839                         }
 840                 }
 841         }
 842
 843         /** @todo document */
 844         function tocIndent() {
 845                 return "\n<ul>";
 846         }
 847
 848         /** @todo document */
 849         function tocUnindent($level) {
 850                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level>0 ? $level : 0 );
 851         }
 852
 853         /**
 854          * parameter level defines if we are on an indentation level
 855          */
 856         function tocLine( $anchor, $tocline, $tocnumber, $level ) {
 857                 return "\n<li class='toclevel-$level'><a href=\"#" .
 858                         $anchor . '"><span class="tocnumber">' .
 859                         $tocnumber . '</span> <span class="toctext">' .
 860                         $tocline . '</span></a>';
 861         }
 862
 863         /** @todo document */
 864         function tocLineEnd() {
 865                 return "</li>\n";
 866         }
 867
 868         /** @todo document */
 869         function tocList($toc) {
 870                 global $wgJsMimeType;
 871                 $title =  wfMsgForContent('toc') ;
 872                 return
 873                    '<table id="toc" class="toc" summary="' . $title .'"><tr><td>'
 874                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
 875                  . $toc
 876                  . "</ul>\n</td></tr></table>\n"
 877                  . '<script type="' . $wgJsMimeType . '">'
 878                  . ' if (window.showTocToggle) {'
 879                  . ' var tocShowText = "' . wfEscapeJsString( wfMsgForContent('showtoc') ) . '";'
 880                  . ' var tocHideText = "' . wfEscapeJsString( wfMsgForContent('hidetoc') ) . '";'
 881                  . ' showTocToggle();'
 882                  . ' } '
 883                  . "</script>\n";
 884         }
 885
 886         /** @todo document */
 887         function editSectionLinkForOther( $title, $section ) {
 888                 global $wgContLang;
 889
 890                 $title = Title::newFromText( $title );
 891                 $editurl = '&section='.$section;
 892                 $url = $this->makeKnownLinkObj( $title, wfMsg('editsection'), 'action=edit'.$editurl );
 893
 894                 if( $wgContLang->isRTL() ) {
 895                         $farside = 'left';
 896                         $nearside = 'right';
 897                 } else {
 898                         $farside = 'right';
 899                         $nearside = 'left';
 900                 }
 901                 return "<div class=\"editsection\" style=\"float:$farside;margin-$nearside:5px;\">[".$url."]</div>";
 902
 903         }
 904
 905         /** @todo document */
 906         function editSectionLink( $nt, $section ) {
 907                 global $wgContLang;
 908
 909                 $editurl = '&section='.$section;
 910                 $url = $this->makeKnownLinkObj( $nt, wfMsg('editsection'), 'action=edit'.$editurl );
 911
 912                 if( $wgContLang->isRTL() ) {
 913                         $farside = 'left';
 914                         $nearside = 'right';
 915                 } else {
 916                         $farside = 'right';
 917                         $nearside = 'left';
 918                 }
 919                 return "<div class=\"editsection\" style=\"float:$farside;margin-$nearside:5px;\">[".$url."]</div>";
 920         }
 921
 922         /**
 923          * Split a link trail, return the "inside" portion and the remainder of the trail
 924          * as a two-element array
 925          *
 926          * @static
 927          */
 928         function splitTrail( $trail ) {
 929                 static $regex = false;
 930                 if ( $regex === false ) {
 931                         global $wgContLang;
 932                         $regex = $wgContLang->linkTrail();
 933                 }
 934                 $inside = '';
 935                 if ( '' != $trail ) {
 936                         if ( preg_match( $regex, $trail, $m ) ) {
 937                                 $inside = $m[1];
 938                                 $trail = $m[2];
 939                         }
 940                 }
 941                 return array( $inside, $trail );
 942         }
 943
 944 }
 945 ?>