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  */
   8
   9 /**
  10  * For the moment, Skin is a descendent class of Linker.
  11  * In the future, it should probably be further split
  12  * so that ever other bit of the wiki doesn't have to
  13  * go loading up Skin to get at it.
  14  *
  15  */
  16 class Linker {
  17         function __construct() {}
  18
  19         /**
  20          * @deprecated
  21          */
  22         function postParseLinkColour( $s = NULL ) {
  23                 return NULL;
  24         }
  25
  26         /** @todo document */
  27         function getExternalLinkAttributes( $link, $text, $class='' ) {
  28                 $link = htmlspecialchars( $link );
  29
  30                 $r = ($class != '') ? " class=\"$class\"" : " class=\"external\"";
  31
  32                 $r .= " title=\"{$link}\"";
  33                 return $r;
  34         }
  35
  36         function getInterwikiLinkAttributes( $link, $text, $class='' ) {
  37                 global $wgContLang;
  38
  39                 $link = urldecode( $link );
  40                 $link = $wgContLang->checkTitleEncoding( $link );
  41                 $link = preg_replace( '/[\\x00-\\x1f]/', ' ', $link );
  42                 $link = htmlspecialchars( $link );
  43
  44                 $r = ($class != '') ? " class=\"$class\"" : " class=\"external\"";
  45
  46                 $r .= " title=\"{$link}\"";
  47                 return $r;
  48         }
  49
  50         /** @todo document */
  51         function getInternalLinkAttributes( $link, $text, $broken = false ) {
  52                 $link = urldecode( $link );
  53                 $link = str_replace( '_', ' ', $link );
  54                 $link = htmlspecialchars( $link );
  55
  56                 if( $broken == 'stub' ) {
  57                         $r = ' class="stub"';
  58                 } else if ( $broken == 'yes' ) {
  59                         $r = ' class="new"';
  60                 } else {
  61                         $r = '';
  62                 }
  63
  64                 $r .= " title=\"{$link}\"";
  65                 return $r;
  66         }
  67
  68         /**
  69          * @param $nt Title object.
  70          * @param $text String: FIXME
  71          * @param $broken Boolean: FIXME, default 'false'.
  72          */
  73         function getInternalLinkAttributesObj( &$nt, $text, $broken = false ) {
  74                 if( $broken == 'stub' ) {
  75                         $r = ' class="stub"';
  76                 } else if ( $broken == 'yes' ) {
  77                         $r = ' class="new"';
  78                 } else {
  79                         $r = '';
  80                 }
  81
  82                 $r .= ' title="' . $nt->getEscapedText() . '"';
  83                 return $r;
  84         }
  85
  86         /**
  87          * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
  88          * it if you already have a title object handy. See makeLinkObj for further documentation.
  89          *
  90          * @param $title String: the text of the title
  91          * @param $text  String: link text
  92          * @param $query String: optional query part
  93          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
  94          *                      be included in the link text. Other characters will be appended after
  95          *                      the end of the link.
  96          */
  97         function makeLink( $title, $text = '', $query = '', $trail = '' ) {
  98                 wfProfileIn( 'Linker::makeLink' );
  99                 $nt = Title::newFromText( $title );
 100                 if ($nt) {
 101                         $result = $this->makeLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 102                 } else {
 103                         wfDebug( 'Invalid title passed to Linker::makeLink(): "'.$title."\"\n" );
 104                         $result = $text == "" ? $title : $text;
 105                 }
 106
 107                 wfProfileOut( 'Linker::makeLink' );
 108                 return $result;
 109         }
 110
 111         /**
 112          * This function is a shortcut to makeKnownLinkObj(Title::newFromText($title),...). Do not call
 113          * it if you already have a title object handy. See makeKnownLinkObj for further documentation.
 114          *
 115          * @param $title String: the text of the title
 116          * @param $text  String: link text
 117          * @param $query String: optional query part
 118          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 119          *                      be included in the link text. Other characters will be appended after
 120          *                      the end of the link.
 121          */
 122         function makeKnownLink( $title, $text = '', $query = '', $trail = '', $prefix = '',$aprops = '') {
 123                 $nt = Title::newFromText( $title );
 124                 if ($nt) {
 125                         return $this->makeKnownLinkObj( Title::newFromText( $title ), $text, $query, $trail, $prefix , $aprops );
 126                 } else {
 127                         wfDebug( 'Invalid title passed to Linker::makeKnownLink(): "'.$title."\"\n" );
 128                         return $text == '' ? $title : $text;
 129                 }
 130         }
 131
 132         /**
 133          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
 134          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
 135          *
 136          * @param string $title The text of the title
 137          * @param string $text Link text
 138          * @param string $query Optional query part
 139          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 140          *                      be included in the link text. Other characters will be appended after
 141          *                      the end of the link.
 142          */
 143         function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
 144                 $nt = Title::newFromText( $title );
 145                 if ($nt) {
 146                         return $this->makeBrokenLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 147                 } else {
 148                         wfDebug( 'Invalid title passed to Linker::makeBrokenLink(): "'.$title."\"\n" );
 149                         return $text == '' ? $title : $text;
 150                 }
 151         }
 152
 153         /**
 154          * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
 155          * it if you already have a title object handy. See makeStubLinkObj for further documentation.
 156          *
 157          * @param $title String: the text of the title
 158          * @param $text  String: link text
 159          * @param $query String: optional query part
 160          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 161          *                      be included in the link text. Other characters will be appended after
 162          *                      the end of the link.
 163          */
 164         function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
 165                 $nt = Title::newFromText( $title );
 166                 if ($nt) {
 167                         return $this->makeStubLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 168                 } else {
 169                         wfDebug( 'Invalid title passed to Linker::makeStubLink(): "'.$title."\"\n" );
 170                         return $text == '' ? $title : $text;
 171                 }
 172         }
 173
 174         /**
 175          * Make a link for a title which may or may not be in the database. If you need to
 176          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
 177          * call to this will result in a DB query.
 178          *
 179          * @param $nt     Title: the title object to make the link from, e.g. from
 180          *                      Title::newFromText.
 181          * @param $text  String: link text
 182          * @param $query String: optional query part
 183          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 184          *                      be included in the link text. Other characters will be appended after
 185          *                      the end of the link.
 186          * @param $prefix String: optional prefix. As trail, only before instead of after.
 187          */
 188         function makeLinkObj( $nt, $text= '', $query = '', $trail = '', $prefix = '' ) {
 189                 global $wgUser;
 190                 $fname = 'Linker::makeLinkObj';
 191                 wfProfileIn( $fname );
 192
 193                 # Fail gracefully
 194                 if ( ! is_object($nt) ) {
 195                         # throw new MWException();
 196                         wfProfileOut( $fname );
 197                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 198                 }
 199
 200                 if ( $nt->isExternal() ) {
 201                         $u = $nt->getFullURL();
 202                         $link = $nt->getPrefixedURL();
 203                         if ( '' == $text ) { $text = $nt->getPrefixedText(); }
 204                         $style = $this->getInterwikiLinkAttributes( $link, $text, 'extiw' );
 205
 206                         $inside = '';
 207                         if ( '' != $trail ) {
 208                                 $m = array();
 209                                 if ( preg_match( '/^([a-z]+)(.*)$$/sD', $trail, $m ) ) {
 210                                         $inside = $m[1];
 211                                         $trail = $m[2];
 212                                 }
 213                         }
 214                         $t = "<a href=\"{$u}\"{$style}>{$text}{$inside}</a>";
 215
 216                         wfProfileOut( $fname );
 217                         return $t;
 218                 } elseif ( $nt->isAlwaysKnown() ) {
 219                         # Image links, special page links and self-links with fragements are always known.
 220                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 221                 } else {
 222                         wfProfileIn( $fname.'-immediate' );
 223                         # Work out link colour immediately
 224                         $aid = $nt->getArticleID() ;
 225                         if ( 0 == $aid ) {
 226                                 $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 227                         } else {
 228                                 $threshold = $wgUser->getOption('stubthreshold') ;
 229                                 if ( $threshold > 0 ) {
 230                                         $dbr =& wfGetDB( DB_SLAVE );
 231                                         $s = $dbr->selectRow(
 232                                                 array( 'page' ),
 233                                                 array( 'page_len',
 234                                                         'page_namespace',
 235                                                         'page_is_redirect' ),
 236                                                 array( 'page_id' => $aid ), $fname ) ;
 237                                         if ( $s !== false ) {
 238                                                 $size = $s->page_len;
 239                                                 if ( $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
 240                                                         $size = $threshold*2 ; # Really big
 241                                                 }
 242                                         } else {
 243                                                 $size = $threshold*2 ; # Really big
 244                                         }
 245                                 } else {
 246                                         $size = 1 ;
 247                                 }
 248                                 if ( $size < $threshold ) {
 249                                         $retVal = $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 250                                 } else {
 251                                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 252                                 }
 253                         }
 254                         wfProfileOut( $fname.'-immediate' );
 255                 }
 256                 wfProfileOut( $fname );
 257                 return $retVal;
 258         }
 259
 260         /**
 261          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
 262          * it doesn't have to do a database query. It's also valid for interwiki titles and special
 263          * pages.
 264          *
 265          * @param $nt Title object of target page
 266          * @param $text   String: text to replace the title
 267          * @param $query  String: link target
 268          * @param $trail  String: text after link
 269          * @param $prefix String: text before link text
 270          * @param $aprops String: extra attributes to the a-element
 271          * @param $style  String: style to apply - if empty, use getInternalLinkAttributesObj instead
 272          * @return the a-element
 273          */
 274         function makeKnownLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = '' ) {
 275
 276                 $fname = 'Linker::makeKnownLinkObj';
 277                 wfProfileIn( $fname );
 278
 279                 if ( !is_object( $nt ) ) {
 280                         wfProfileOut( $fname );
 281                         return $text;
 282                 }
 283
 284                 $u = $nt->escapeLocalURL( $query );
 285                 if ( $nt->getFragment() != '' ) {
 286                         if( $nt->getPrefixedDbkey() == '' ) {
 287                                 $u = '';
 288                                 if ( '' == $text ) {
 289                                         $text = htmlspecialchars( $nt->getFragment() );
 290                                 }
 291                         }
 292                         $u .= $nt->getFragmentForURL();
 293                 }
 294                 if ( $text == '' ) {
 295                         $text = htmlspecialchars( $nt->getPrefixedText() );
 296                 }
 297                 if ( $style == '' ) {
 298                         $style = $this->getInternalLinkAttributesObj( $nt, $text );
 299                 }
 300
 301                 if ( $aprops !== '' ) $aprops = ' ' . $aprops;
 302
 303                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 304                 $r = "<a href=\"{$u}\"{$style}{$aprops}>{$prefix}{$text}{$inside}</a>{$trail}";
 305                 wfProfileOut( $fname );
 306                 return $r;
 307         }
 308
 309         /**
 310          * Make a red link to the edit page of a given title.
 311          *
 312          * @param $title String: The text of the title
 313          * @param $text  String: Link text
 314          * @param $query String: Optional query part
 315          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
 316          *                      be included in the link text. Other characters will be appended after
 317          *                      the end of the link.
 318          */
 319         function makeBrokenLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 320                 # Fail gracefully
 321                 if ( ! isset($nt) ) {
 322                         # throw new MWException();
 323                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 324                 }
 325
 326                 $fname = 'Linker::makeBrokenLinkObj';
 327                 wfProfileIn( $fname );
 328
 329                 if ( '' == $query ) {
 330                         $q = 'action=edit';
 331                 } else {
 332                         $q = 'action=edit&'.$query;
 333                 }
 334                 $u = $nt->escapeLocalURL( $q );
 335
 336                 if ( '' == $text ) {
 337                         $text = htmlspecialchars( $nt->getPrefixedText() );
 338                 }
 339                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 340
 341                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 342                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 343
 344                 wfProfileOut( $fname );
 345                 return $s;
 346         }
 347
 348         /**
 349          * Make a brown link to a short article.
 350          *
 351          * @param $title String: the text of the title
 352          * @param $text  String: link text
 353          * @param $query String: optional query part
 354          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 355          *                      be included in the link text. Other characters will be appended after
 356          *                      the end of the link.
 357          */
 358         function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 359                 $u = $nt->escapeLocalURL( $query );
 360
 361                 if ( '' == $text ) {
 362                         $text = htmlspecialchars( $nt->getPrefixedText() );
 363                 }
 364                 $style = $this->getInternalLinkAttributesObj( $nt, $text, 'stub' );
 365
 366                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 367                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 368                 return $s;
 369         }
 370
 371         /**
 372          * Generate either a normal exists-style link or a stub link, depending
 373          * on the given page size.
 374          *
 375          * @param $size Integer
 376          * @param $nt Title object.
 377          * @param $text String
 378          * @param $query String
 379          * @param $trail String
 380          * @param $prefix String
 381          * @return string HTML of link
 382          */
 383         function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 384                 global $wgUser;
 385                 $threshold = intval( $wgUser->getOption( 'stubthreshold' ) );
 386                 if( $size < $threshold ) {
 387                         return $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 388                 } else {
 389                         return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 390                 }
 391         }
 392
 393         /**
 394          * Make appropriate markup for a link to the current article. This is currently rendered
 395          * as the bold link text. The calling sequence is the same as the other make*LinkObj functions,
 396          * despite $query not being used.
 397          */
 398         function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 399                 if ( '' == $text ) {
 400                         $text = htmlspecialchars( $nt->getPrefixedText() );
 401                 }
 402                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 403                 return "<strong class=\"selflink\">{$prefix}{$text}{$inside}</strong>{$trail}";
 404         }
 405
 406         /** @todo document */
 407         function fnamePart( $url ) {
 408                 $basename = strrchr( $url, '/' );
 409                 if ( false === $basename ) {
 410                         $basename = $url;
 411                 } else {
 412                         $basename = substr( $basename, 1 );
 413                 }
 414                 return htmlspecialchars( $basename );
 415         }
 416
 417         /** Obsolete alias */
 418         function makeImage( $url, $alt = '' ) {
 419                 return $this->makeExternalImage( $url, $alt );
 420         }
 421
 422         /** @todo document */
 423         function makeExternalImage( $url, $alt = '' ) {
 424                 if ( '' == $alt ) {
 425                         $alt = $this->fnamePart( $url );
 426                 }
 427                 $s = '<img src="'.$url.'" alt="'.$alt.'" />';
 428                 return $s;
 429         }
 430
 431         /** @todo document */
 432         function makeImageLinkObj( $nt, $label, $alt, $align = '', $width = false, $height = false, $framed = false,
 433           $thumb = false, $manual_thumb = '', $page = null )
 434         {
 435                 global $wgContLang, $wgUser, $wgThumbLimits, $wgGenerateThumbnailOnParse;
 436
 437                 $img   = new Image( $nt );
 438
 439                 if ( ! is_null( $page ) ) {
 440                         $img->selectPage( $page );
 441                 }
 442
 443                 if ( !$img->allowInlineDisplay() && $img->exists() ) {
 444                         return $this->makeKnownLinkObj( $nt );
 445                 }
 446
 447                 $url   = $img->getViewURL();
 448                 $error = $prefix = $postfix = '';
 449
 450                 wfDebug( "makeImageLinkObj: '$width'x'$height', \"$label\"\n" );
 451
 452                 if ( 'center' == $align )
 453                 {
 454                         $prefix  = '<div class="center">';
 455                         $postfix = '</div>';
 456                         $align   = 'none';
 457                 }
 458
 459                 if ( $thumb || $framed ) {
 460
 461                         # Create a thumbnail. Alignment depends on language
 462                         # writing direction, # right aligned for left-to-right-
 463                         # languages ("Western languages"), left-aligned
 464                         # for right-to-left-languages ("Semitic languages")
 465                         #
 466                         # If  thumbnail width has not been provided, it is set
 467                         # to the default user option as specified in Language*.php
 468                         if ( $align == '' ) {
 469                                 $align = $wgContLang->isRTL() ? 'left' : 'right';
 470                         }
 471
 472
 473                         if ( $width === false ) {
 474                                 $wopt = $wgUser->getOption( 'thumbsize' );
 475
 476                                 if( !isset( $wgThumbLimits[$wopt] ) ) {
 477                                          $wopt = User::getDefaultOption( 'thumbsize' );
 478                                 }
 479
 480                                 $width = min( $img->getWidth(), $wgThumbLimits[$wopt] );
 481                         }
 482
 483                         return $prefix.$this->makeThumbLinkObj( $img, $label, $alt, $align, $width, $height, $framed, $manual_thumb ).$postfix;
 484                 }
 485
 486                 if ( $width && $img->exists() ) {
 487
 488                         # Create a resized image, without the additional thumbnail
 489                         # features
 490
 491                         if ( $height == false )
 492                                 $height = -1;
 493                         if ( $manual_thumb == '') {
 494                                 $thumb = $img->getThumbnail( $width, $height, $wgGenerateThumbnailOnParse );
 495                                 if ( $thumb ) {
 496                                         // In most cases, $width = $thumb->width or $height = $thumb->height.
 497                                         // If not, we're scaling the image larger than it can be scaled,
 498                                         // so we send to the browser a smaller thumbnail, and let the client do the scaling.
 499
 500                                         if ($height != -1 && $width > $thumb->width * $height / $thumb->height) {
 501                                                 // $height is the limiting factor, not $width
 502                                                 // set $width to the largest it can be, such that the resulting
 503                                                 // scaled height is at most $height
 504                                                 $width = floor($thumb->width * $height / $thumb->height);
 505                                         }
 506                                         $height = round($thumb->height * $width / $thumb->width);
 507
 508                                         wfDebug( "makeImageLinkObj: client-size set to '$width x $height'\n" );
 509                                         $url = $thumb->getUrl();
 510                                 } else {
 511                                         $error = htmlspecialchars( $img->getLastError() );
 512                                         // Do client-side scaling...
 513                                         $height = intval( $img->getHeight() * $width / $img->getWidth() );
 514                                 }
 515                         }
 516                 } else {
 517                         $width = $img->width;
 518                         $height = $img->height;
 519                 }
 520
 521                 wfDebug( "makeImageLinkObj2: '$width'x'$height'\n" );
 522                 $u = $nt->escapeLocalURL();
 523                 if ( $error ) {
 524                         $s = $error;
 525                 } elseif ( $url == '' ) {
 526                         $s = $this->makeBrokenImageLinkObj( $img->getTitle() );
 527                         //$s .= "<br />{$alt}<br />{$url}<br />\n";
 528                 } else {
 529                         $s = '<a href="'.$u.'" class="image" title="'.$alt.'">' .
 530                                  '<img src="'.$url.'" alt="'.$alt.'" ' .
 531                                  ( $width
 532                                         ? ( 'width="'.$width.'" height="'.$height.'" ' )
 533                                         : '' ) .
 534                                  'longdesc="'.$u.'" /></a>';
 535                 }
 536                 if ( '' != $align ) {
 537                         $s = "<div class=\"float{$align}\"><span>{$s}</span></div>";
 538                 }
 539                 return str_replace("\n", ' ',$prefix.$s.$postfix);
 540         }
 541
 542         /**
 543          * Make HTML for a thumbnail including image, border and caption
 544          * $img is an Image object
 545          */
 546         function makeThumbLinkObj( $img, $label = '', $alt, $align = 'right', $boxwidth = 180, $boxheight=false, $framed=false , $manual_thumb = "" ) {
 547                 global $wgStylePath, $wgContLang, $wgGenerateThumbnailOnParse;
 548                 $thumbUrl = '';
 549                 $error = '';
 550
 551                 $width = $height = 0;
 552                 if ( $img->exists() ) {
 553                         $width  = $img->getWidth();
 554                         $height = $img->getHeight();
 555                 }
 556                 if ( 0 == $width || 0 == $height ) {
 557                         $width = $height = 180;
 558                 }
 559                 if ( $boxwidth == 0 ) {
 560                         $boxwidth = 180;
 561                 }
 562                 if ( $framed ) {
 563                         // Use image dimensions, don't scale
 564                         $boxwidth  = $width;
 565                         $boxheight = $height;
 566                         $thumbUrl  = $img->getViewURL();
 567                 } else {
 568                         if ( $boxheight === false )
 569                                 $boxheight = -1;
 570                         if ( '' == $manual_thumb ) {
 571                                 $thumb = $img->getThumbnail( $boxwidth, $boxheight, $wgGenerateThumbnailOnParse );
 572                                 if ( $thumb ) {
 573                                         $thumbUrl = $thumb->getUrl();
 574                                         $boxwidth = $thumb->width;
 575                                         $boxheight = $thumb->height;
 576                                 } else {
 577                                         $error = $img->getLastError();
 578                                 }
 579                         }
 580                 }
 581                 $oboxwidth = $boxwidth + 2;
 582
 583                 if ( $manual_thumb != '' ) # Use manually specified thumbnail
 584                 {
 585                         $manual_title = Title::makeTitleSafe( NS_IMAGE, $manual_thumb ); #new Title ( $manual_thumb ) ;
 586                         if( $manual_title ) {
 587                                 $manual_img = new Image( $manual_title );
 588                                 $thumbUrl = $manual_img->getViewURL();
 589                                 if ( $manual_img->exists() )
 590                                 {
 591                                         $width  = $manual_img->getWidth();
 592                                         $height = $manual_img->getHeight();
 593                                         $boxwidth = $width ;
 594                                         $boxheight = $height ;
 595                                         $oboxwidth = $boxwidth + 2 ;
 596                                 }
 597                         }
 598                 }
 599
 600                 $u = $img->getEscapeLocalURL();
 601
 602                 $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
 603                 $magnifyalign = $wgContLang->isRTL() ? 'left' : 'right';
 604                 $textalign = $wgContLang->isRTL() ? ' style="text-align:right"' : '';
 605
 606                 $s = "<div class=\"thumb t{$align}\"><div class=\"thumbinner\" style=\"width:{$oboxwidth}px;\">";
 607                 if( $thumbUrl == '' ) {
 608                         // Couldn't generate thumbnail? Scale the image client-side.
 609                         $thumbUrl = $img->getViewURL();
 610                         if( $boxheight == -1 ) {
 611                                 // Approximate...
 612                                 $boxheight = intval( $height * $boxwidth / $width );
 613                         }
 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.'" class="thumbimage" /></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="" /></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                         # throw new MWException();
 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 = SpecialPage::getTitleFor( '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 object.
 680          * @param $text  String: pre-sanitized HTML
 681          * @param $nourl Boolean: Mask absolute URLs, so the parser doesn't
 682          *                       linkify them (it is currently not context-aware)
 683          * @return string HTML
 684          *
 685          * @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                         $img  = new Image( $title );
 694                         if( $img->exists() ) {
 695                                 $url  = $img->getURL();
 696                                 $class = 'internal';
 697                         } else {
 698                                 $upload = SpecialPage::getTitleFor( 'Upload' );
 699                                 $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $img->getName() ) );
 700                                 $class = 'new';
 701                         }
 702                         $alt = htmlspecialchars( $title->getText() );
 703                         if( $text == '' ) {
 704                                 $text = $alt;
 705                         }
 706                         $u = htmlspecialchars( $url );
 707                         return "<a href=\"{$u}\" class=\"$class\" title=\"{$alt}\">{$text}</a>";
 708                 }
 709         }
 710
 711         /** @todo document */
 712         function specialLink( $name, $key = '' ) {
 713                 global $wgContLang;
 714
 715                 if ( '' == $key ) { $key = strtolower( $name ); }
 716                 $pn = $wgContLang->ucfirst( $name );
 717                 return $this->makeKnownLink( $wgContLang->specialPage( $pn ),
 718                   wfMsg( $key ) );
 719         }
 720
 721         /** @todo document */
 722         function makeExternalLink( $url, $text, $escape = true, $linktype = '', $ns = null ) {
 723                 $style = $this->getExternalLinkAttributes( $url, $text, 'external ' . $linktype );
 724                 global $wgNoFollowLinks, $wgNoFollowNsExceptions;
 725                 if( $wgNoFollowLinks && !(isset($ns) && in_array($ns, $wgNoFollowNsExceptions)) ) {
 726                         $style .= ' rel="nofollow"';
 727                 }
 728                 $url = htmlspecialchars( $url );
 729                 if( $escape ) {
 730                         $text = htmlspecialchars( $text );
 731                 }
 732                 return '<a href="'.$url.'"'.$style.'>'.$text.'</a>';
 733         }
 734
 735         /**
 736          * Make user link (or user contributions for unregistered users)
 737          * @param $userId   Integer: user id in database.
 738          * @param $userText String: user name in database
 739          * @return string HTML fragment
 740          * @private
 741          */
 742         function userLink( $userId, $userText ) {
 743                 $encName = htmlspecialchars( $userText );
 744                 if( $userId == 0 ) {
 745                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 746                         return $this->makeKnownLinkObj( $contribsPage,
 747                                 $encName);
 748                 } else {
 749                         $userPage = Title::makeTitle( NS_USER, $userText );
 750                         return $this->makeLinkObj( $userPage, $encName );
 751                 }
 752         }
 753
 754         /**
 755          * @param $userId Integer: user id in database.
 756          * @param $userText String: user name in database.
 757          * @return string HTML fragment with talk and/or block links
 758          * @private
 759          */
 760         function userToolLinks( $userId, $userText ) {
 761                 global $wgUser, $wgDisableAnonTalk, $wgSysopUserBans;
 762                 $talkable = !( $wgDisableAnonTalk && 0 == $userId );
 763                 $blockable = ( $wgSysopUserBans || 0 == $userId );
 764
 765                 $items = array();
 766                 if( $talkable ) {
 767                         $items[] = $this->userTalkLink( $userId, $userText );
 768                 }
 769                 if( $userId ) {
 770                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 771                         $items[] = $this->makeKnownLinkObj( $contribsPage ,
 772                                 wfMsgHtml( 'contribslink' ) );
 773                 }
 774                 if( $blockable && $wgUser->isAllowed( 'block' ) ) {
 775                         $items[] = $this->blockLink( $userId, $userText );
 776                 }
 777
 778                 if( $items ) {
 779                         return ' (' . implode( ' | ', $items ) . ')';
 780                 } else {
 781                         return '';
 782                 }
 783         }
 784
 785         /**
 786          * @param $userId Integer: user id in database.
 787          * @param $userText String: user name in database.
 788          * @return string HTML fragment with user talk link
 789          * @private
 790          */
 791         function userTalkLink( $userId, $userText ) {
 792                 global $wgLang;
 793                 $talkname = $wgLang->getNsText( NS_TALK ); # use the shorter name
 794
 795                 $userTalkPage = Title::makeTitle( NS_USER_TALK, $userText );
 796                 $userTalkLink = $this->makeLinkObj( $userTalkPage, $talkname );
 797                 return $userTalkLink;
 798         }
 799
 800         /**
 801          * @param $userId Integer: userid
 802          * @param $userText String: user name in database.
 803          * @return string HTML fragment with block link
 804          * @private
 805          */
 806         function blockLink( $userId, $userText ) {
 807                 $blockPage = SpecialPage::getTitleFor( 'Blockip', $userText );
 808                 $blockLink = $this->makeKnownLinkObj( $blockPage,
 809                         wfMsgHtml( 'blocklink' ) );
 810                 return $blockLink;
 811         }
 812
 813         /**
 814          * Generate a user link if the current user is allowed to view it
 815          * @param $rev Revision object.
 816          * @return string HTML
 817          */
 818         function revUserLink( $rev ) {
 819                 if( $rev->userCan( Revision::DELETED_USER ) ) {
 820                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() );
 821                 } else {
 822                         $link = wfMsgHtml( 'rev-deleted-user' );
 823                 }
 824                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 825                         return '<span class="history-deleted">' . $link . '</span>';
 826                 }
 827                 return $link;
 828         }
 829
 830         /**
 831          * Generate a user tool link cluster if the current user is allowed to view it
 832          * @param $rev Revision object.
 833          * @return string HTML
 834          */
 835         function revUserTools( $rev ) {
 836                 if( $rev->userCan( Revision::DELETED_USER ) ) {
 837                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() ) .
 838                                 ' ' .
 839                                 $this->userToolLinks( $rev->getRawUser(), $rev->getRawUserText() );
 840                 } else {
 841                         $link = wfMsgHtml( 'rev-deleted-user' );
 842                 }
 843                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 844                         return '<span class="history-deleted">' . $link . '</span>';
 845                 }
 846                 return $link;
 847         }
 848
 849         /**
 850          * This function is called by all recent changes variants, by the page history,
 851          * and by the user contributions list. It is responsible for formatting edit
 852          * comments. It escapes any HTML in the comment, but adds some CSS to format
 853          * auto-generated comments (from section editing) and formats [[wikilinks]].
 854          *
 855          * @author Erik Moeller <moeller@scireview.de>
 856          *
 857          * Note: there's not always a title to pass to this function.
 858          * Since you can't set a default parameter for a reference, I've turned it
 859          * temporarily to a value pass. Should be adjusted further. --brion
 860          *
 861          * $param string $comment
 862          * @param mixed $title Title object (to generate link to the section in autocomment) or null
 863          * @param bool $local Whether section links should refer to local page
 864          */
 865         function formatComment($comment, $title = NULL, $local = false) {
 866                 wfProfileIn( __METHOD__ );
 867
 868                 global $wgContLang;
 869                 $comment = str_replace( "\n", " ", $comment );
 870                 $comment = htmlspecialchars( $comment );
 871
 872                 # The pattern for autogen comments is / * foo * /, which makes for
 873                 # some nasty regex.
 874                 # We look for all comments, match any text before and after the comment,
 875                 # add a separator where needed and format the comment itself with CSS
 876                 $match = array();
 877                 while (preg_match('/(.*)\/\*\s*(.*?)\s*\*\/(.*)/', $comment,$match)) {
 878                         $pre=$match[1];
 879                         $auto=$match[2];
 880                         $post=$match[3];
 881                         $link='';
 882                         if( $title ) {
 883                                 $section = $auto;
 884
 885                                 # Generate a valid anchor name from the section title.
 886                                 # Hackish, but should generally work - we strip wiki
 887                                 # syntax, including the magic [[: that is used to
 888                                 # "link rather than show" in case of images and
 889                                 # interlanguage links.
 890                                 $section = str_replace( '[[:', '', $section );
 891                                 $section = str_replace( '[[', '', $section );
 892                                 $section = str_replace( ']]', '', $section );
 893                                 if ( $local ) {
 894                                         $sectionTitle = Title::newFromText( '#' . $section);
 895                                 } else {
 896                                         $sectionTitle = wfClone( $title );
 897                                         $sectionTitle->mFragment = $section;
 898                                 }
 899                                 $link = $this->makeKnownLinkObj( $sectionTitle, wfMsg( 'sectionlink' ) );
 900                         }
 901                         $sep='-';
 902                         $auto=$link.$auto;
 903                         if($pre) { $auto = $sep.' '.$auto; }
 904                         if($post) { $auto .= ' '.$sep; }
 905                         $auto='<span class="autocomment">'.$auto.'</span>';
 906                         $comment=$pre.$auto.$post;
 907                 }
 908
 909                 # format regular and media links - all other wiki formatting
 910                 # is ignored
 911                 $medians = '(?:' . preg_quote( Namespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
 912                 $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
 913                 while(preg_match('/\[\[:?(.*?)(\|(.*?))*\]\](.*)$/',$comment,$match)) {
 914                         # Handle link renaming [[foo|text]] will show link as "text"
 915                         if( "" != $match[3] ) {
 916                                 $text = $match[3];
 917                         } else {
 918                                 $text = $match[1];
 919                         }
 920                         $submatch = array();
 921                         if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
 922                                 # Media link; trail not supported.
 923                                 $linkRegexp = '/\[\[(.*?)\]\]/';
 924                                 $thelink = $this->makeMediaLink( $submatch[1], "", $text );
 925                         } else {
 926                                 # Other kind of link
 927                                 if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
 928                                         $trail = $submatch[1];
 929                                 } else {
 930                                         $trail = "";
 931                                 }
 932                                 $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
 933                                 if (isset($match[1][0]) && $match[1][0] == ':')
 934                                         $match[1] = substr($match[1], 1);
 935                                 $thelink = $this->makeLink( $match[1], $text, "", $trail );
 936                         }
 937                         $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
 938                 }
 939                 wfProfileOut( __METHOD__ );
 940                 return $comment;
 941         }
 942
 943         /**
 944          * Wrap a comment in standard punctuation and formatting if
 945          * it's non-empty, otherwise return empty string.
 946          *
 947          * @param string $comment
 948          * @param mixed $title Title object (to generate link to section in autocomment) or null
 949          * @param bool $local Whether section links should refer to local page
 950          *
 951          * @return string
 952          */
 953         function commentBlock( $comment, $title = NULL, $local = false ) {
 954                 // '*' used to be the comment inserted by the software way back
 955                 // in antiquity in case none was provided, here for backwards
 956                 // compatability, acc. to brion -ævar
 957                 if( $comment == '' || $comment == '*' ) {
 958                         return '';
 959                 } else {
 960                         $formatted = $this->formatComment( $comment, $title, $local );
 961                         return " <span class=\"comment\">($formatted)</span>";
 962                 }
 963         }
 964
 965         /**
 966          * Wrap and format the given revision's comment block, if the current
 967          * user is allowed to view it.
 968          *
 969          * @param Revision $rev
 970          * @param bool $local Whether section links should refer to local page
 971          * @return string HTML
 972          */
 973         function revComment( Revision $rev, $local = false ) {
 974                 if( $rev->userCan( Revision::DELETED_COMMENT ) ) {
 975                         $block = $this->commentBlock( $rev->getRawComment(), $rev->getTitle(), $local );
 976                 } else {
 977                         $block = " <span class=\"comment\">" .
 978                                 wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
 979                 }
 980                 if( $rev->isDeleted( Revision::DELETED_COMMENT ) ) {
 981                         return " <span class=\"history-deleted\">$block</span>";
 982                 }
 983                 return $block;
 984         }
 985
 986         /** @todo document */
 987         function tocIndent() {
 988                 return "\n<ul>";
 989         }
 990
 991         /** @todo document */
 992         function tocUnindent($level) {
 993                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level>0 ? $level : 0 );
 994         }
 995
 996         /**
 997          * parameter level defines if we are on an indentation level
 998          */
 999         function tocLine( $anchor, $tocline, $tocnumber, $level ) {
1000                 return "\n<li class=\"toclevel-$level\"><a href=\"#" .
1001                         $anchor . '"><span class="tocnumber">' .
1002                         $tocnumber . '</span> <span class="toctext">' .
1003                         $tocline . '</span></a>';
1004         }
1005
1006         /** @todo document */
1007         function tocLineEnd() {
1008                 return "</li>\n";
1009         }
1010
1011         /** @todo document */
1012         function tocList($toc) {
1013                 global $wgJsMimeType;
1014                 $title =  wfMsgForContent('toc') ;
1015                 return
1016                    '<table id="toc" class="toc" summary="' . $title .'"><tr><td>'
1017                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
1018                  . $toc
1019                  # no trailing newline, script should not be wrapped in a
1020                  # paragraph
1021                  . "</ul>\n</td></tr></table>"
1022                  . '<script type="' . $wgJsMimeType . '">'
1023                  . ' if (window.showTocToggle) {'
1024                  . ' var tocShowText = "' . wfEscapeJsString( wfMsgForContent('showtoc') ) . '";'
1025                  . ' var tocHideText = "' . wfEscapeJsString( wfMsgForContent('hidetoc') ) . '";'
1026                  . ' showTocToggle();'
1027                  . ' } '
1028                  . "</script>\n";
1029         }
1030
1031         /** @todo document */
1032         public function editSectionLinkForOther( $title, $section ) {
1033                 global $wgContLang;
1034
1035                 $title = Title::newFromText( $title );
1036                 $editurl = '&section='.$section;
1037                 $url = $this->makeKnownLinkObj( $title, wfMsg('editsection'), 'action=edit'.$editurl );
1038
1039                 return "<span class=\"editsection\">[".$url."]</span>";
1040
1041         }
1042
1043         /**
1044          * @param $title Title object.
1045          * @param $section Integer: section number.
1046          * @param $hint Link String: title, or default if omitted or empty
1047          */
1048         public function editSectionLink( $nt, $section, $hint='' ) {
1049                 global $wgContLang;
1050
1051                 $editurl = '&section='.$section;
1052                 $hint = ( $hint=='' ) ? '' : ' title="' . wfMsgHtml( 'editsectionhint', htmlspecialchars( $hint ) ) . '"';
1053                 $url = $this->makeKnownLinkObj( $nt, wfMsg('editsection'), 'action=edit'.$editurl, '', '', '',  $hint );
1054
1055                 return "<span class=\"editsection\">[".$url."]</span>";
1056         }
1057
1058         /**
1059          * Create a headline for content
1060          *
1061          * @param int    $level   The level of the headline (1-6)
1062          * @param string $attribs Any attributes for the headline, starting with a space and ending with '>'
1063          *                        This *must* be at least '>' for no attribs
1064          * @param string $anchor  The anchor to give the headline (the bit after the #)
1065          * @param string $text    The text of the header
1066          * @param string $link    HTML to add for the section edit link
1067          *
1068          * @return string HTML headline
1069          */
1070         public function makeHeadline( $level, $attribs, $anchor, $text, $link ) {
1071                 return "<a name=\"$anchor\"></a><h$level$attribs$link <span class=\"mw-headline\">$text</span></h$level>";
1072         }
1073
1074         /**
1075          * Split a link trail, return the "inside" portion and the remainder of the trail
1076          * as a two-element array
1077          *
1078          * @static
1079          */
1080         static function splitTrail( $trail ) {
1081                 static $regex = false;
1082                 if ( $regex === false ) {
1083                         global $wgContLang;
1084                         $regex = $wgContLang->linkTrail();
1085                 }
1086                 $inside = '';
1087                 if ( '' != $trail ) {
1088                         $m = array();
1089                         if ( preg_match( $regex, $trail, $m ) ) {
1090                                 $inside = $m[1];
1091                                 $trail = $m[2];
1092                         }
1093                 }
1094                 return array( $inside, $trail );
1095         }
1096
1097         /**
1098          * Generate a rollback link for a given revision.  Currently it's the
1099          * caller's responsibility to ensure that the revision is the top one. If
1100          * it's not, of course, the user will get an error message.
1101          *
1102          * If the calling page is called with the parameter &bot=1, all rollback
1103          * links also get that parameter. It causes the edit itself and the rollback
1104          * to be marked as "bot" edits. Bot edits are hidden by default from recent
1105          * changes, so this allows sysops to combat a busy vandal without bothering
1106          * other users.
1107          *
1108          * @param Revision $rev
1109          */
1110         function generateRollback( $rev ) {
1111                 global $wgUser, $wgRequest;
1112                 $title = $rev->getTitle();
1113
1114                 $extraRollback = $wgRequest->getBool( 'bot' ) ? '&bot=1' : '';
1115                 $extraRollback .= '&token=' . urlencode(
1116                         $wgUser->editToken( array( $title->getPrefixedText(), $rev->getUserText() ) ) );
1117                 return '<span class="mw-rollback-link">['. $this->makeKnownLinkObj( $title,
1118                         wfMsg('rollbacklink'),
1119                         'action=rollback&from=' . urlencode( $rev->getUserText() ) . $extraRollback ) .']</span>';
1120         }
1121
1122         /**
1123          * Returns HTML for the "templates used on this page" list.
1124          *
1125          * @param array $templates Array of templates from Article::getUsedTemplate
1126          * or similar
1127          * @param bool $preview Whether this is for a preview
1128          * @param bool $section Whether this is for a section edit
1129          * @return string HTML output
1130          */
1131         public function formatTemplates( $templates, $preview = false, $section = false) {
1132                 global $wgUser;
1133                 wfProfileIn( __METHOD__ );
1134
1135                 $sk =& $wgUser->getSkin();
1136
1137                 $outText = '';
1138                 if ( count( $templates ) > 0 ) {
1139                         # Do a batch existence check
1140                         $batch = new LinkBatch;
1141                         foreach( $templates as $title ) {
1142                                 $batch->addObj( $title );
1143                         }
1144                         $batch->execute();
1145
1146                         # Construct the HTML
1147                         $outText = '<div class="mw-templatesUsedExplanation">';
1148                         if ( $preview ) {
1149                                 $outText .= wfMsgExt( 'templatesusedpreview', array( 'parse' ) );
1150                         } elseif ( $section ) {
1151                                 $outText .= wfMsgExt( 'templatesusedsection', array( 'parse' ) );
1152                         } else {
1153                                 $outText .= wfMsgExt( 'templatesused', array( 'parse' ) );
1154                         }
1155                         $outText .= '</div><ul>';
1156
1157                         foreach ( $templates as $titleObj ) {
1158                                 $r = $titleObj->getRestrictions( 'edit' );
1159                                 if ( in_array( 'sysop', $r ) ) {
1160                                         $protected = wfMsgExt( 'template-protected', array( 'parseinline' ) );
1161                                 } elseif ( in_array( 'autoconfirmed', $r ) ) {
1162                                         $protected = wfMsgExt( 'template-semiprotected', array( 'parseinline' ) );
1163                                 } else {
1164                                         $protected = '';
1165                                 }
1166                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . ' ' . $protected . '</li>';
1167                         }
1168                         $outText .= '</ul>';
1169                 }
1170                 wfProfileOut( __METHOD__  );
1171                 return $outText;
1172         }
1173
1174         /**
1175          * Format a size in bytes for output, using an appropriate
1176          * unit (B, KB, MB or GB) according to the magnitude in question
1177          *
1178          * @param $size Size to format
1179          * @return string
1180          */
1181         public function formatSize( $size ) {
1182                 global $wgLang;
1183                 if( $size > 1024 ) {
1184                         $size = $size / 1024;
1185                         if( $size > 1024 ) {
1186                                 $size = $size / 1024;
1187                                 if( $size > 1024 ) {
1188                                         $size = $size / 1024;
1189                                         $msg = 'size-gigabytes';
1190                                 } else {
1191                                         $msg = 'size-megabytes';
1192                                 }
1193                         } else {
1194                                 $msg = 'size-kilobytes';
1195                         }
1196                 } else {
1197                         $msg = 'size-bytes';
1198                 }
1199                 $size = round( $size, 0 );
1200                 return wfMsgHtml( $msg, $wgLang->formatNum( $size ) );
1201         }
1202
1203         /**
1204          * Given the id of an interface element, constructs the appropriate title
1205          * and accesskey attributes from the system messages.  (Note, this is usu-
1206          * ally the id but isn't always, because sometimes the accesskey needs to
1207          * go on a different element than the id, for reverse-compatibility, etc.)
1208          *
1209          * @param string $name Id of the element, minus prefixes.
1210          * @return string title and accesskey attributes, ready to drop in an
1211          *   element (e.g., ' title="This does something [x]" accesskey="x"').
1212          */
1213         public function tooltipAndAccesskey($name) {
1214                 $out = '';
1215
1216                 $tooltip = wfMsg('tooltip-'.$name);
1217                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1218                         // Compatibility: formerly some tooltips had [alt-.] hardcoded
1219                         $tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
1220                         $out .= ' title="'.htmlspecialchars($tooltip);
1221                 }
1222                 $accesskey = wfMsg('accesskey-'.$name);
1223                 if ($accesskey && $accesskey != '-' && !wfEmptyMsg('accesskey-'.$name, $accesskey)) {
1224                         if ($out) $out .= " [$accesskey]\" accesskey=\"$accesskey\"";
1225                         else $out .= " title=\"[$accesskey]\" accesskey=\"$accesskey\"";
1226                 } elseif ($out) {
1227                         $out .= '"';
1228                 }
1229                 return $out;
1230         }
1231
1232         /**
1233          * Given the id of an interface element, constructs the appropriate title
1234          * attribute from the system messages.  (Note, this is usually the id but
1235          * isn't always, because sometimes the accesskey needs to go on a different
1236          * element than the id, for reverse-compatibility, etc.)
1237          *
1238          * @param string $name Id of the element, minus prefixes.
1239          * @return string title attribute, ready to drop in an element
1240          * (e.g., ' title="This does something"').
1241          */
1242         public function tooltip($name) {
1243                 $out = '';
1244
1245                 $tooltip = wfMsg('tooltip-'.$name);
1246                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1247                         $out = ' title="'.htmlspecialchars($tooltip).'"';
1248                 }
1249
1250                 return $out;
1251         }
1252 }
1253
1254 ?>