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 = '', $params = array(), $framed = false,
 433           $thumb = false, $manual_thumb = '', $valign = '' )
 434         {
 435                 global $wgContLang, $wgUser, $wgThumbLimits;
 436
 437                 $img   = new Image( $nt );
 438
 439                 if ( !$img->allowInlineDisplay() && $img->exists() ) {
 440                         return $this->makeKnownLinkObj( $nt );
 441                 }
 442
 443                 $error = $prefix = $postfix = '';
 444                 $page = isset( $params['page'] ) ? $params['page'] : false;
 445
 446                 if ( 'center' == $align )
 447                 {
 448                         $prefix  = '<div class="center">';
 449                         $postfix = '</div>';
 450                         $align   = 'none';
 451                 }
 452
 453                 if ( !isset( $params['width'] ) ) {
 454                         $wopt = $wgUser->getOption( 'thumbsize' );
 455
 456                         if( !isset( $wgThumbLimits[$wopt] ) ) {
 457                                  $wopt = User::getDefaultOption( 'thumbsize' );
 458                         }
 459
 460                         $params['width'] = min( $img->getWidth( $page ), $wgThumbLimits[$wopt] );
 461                 }
 462
 463                 if ( $thumb || $framed ) {
 464
 465                         # Create a thumbnail. Alignment depends on language
 466                         # writing direction, # right aligned for left-to-right-
 467                         # languages ("Western languages"), left-aligned
 468                         # for right-to-left-languages ("Semitic languages")
 469                         #
 470                         # If  thumbnail width has not been provided, it is set
 471                         # to the default user option as specified in Language*.php
 472                         if ( $align == '' ) {
 473                                 $align = $wgContLang->isRTL() ? 'left' : 'right';
 474                         }
 475                         return $prefix.$this->makeThumbLinkObj( $img, $label, $alt, $align, $params, $framed, $manual_thumb ).$postfix;
 476                 }
 477
 478                 if ( $params['width'] && $img->exists() ) {
 479                         # Create a resized image, without the additional thumbnail features
 480                         $thumb = $img->transform( $params );
 481                 } else {
 482                         $thumb = false;
 483                 }
 484
 485                 if ( $page ) {
 486                         $query = 'page=' . urlencode( $page );
 487                 } else {
 488                         $query = '';
 489                 }
 490                 $u = $nt->getLocalURL( $query );
 491                 $imgAttribs = array(
 492                         'alt' => $alt,
 493                         'longdesc' => $u
 494                 );
 495                 if ( $valign ) {
 496                         $imgAttribs['style'] = "vertical-align: $valign";
 497                 }
 498                 $linkAttribs = array(
 499                         'href' => $u,
 500                         'class' => 'image',
 501                         'title' => $alt
 502                 );
 503
 504                 if ( !$thumb ) {
 505                         $s = $this->makeBrokenImageLinkObj( $img->getTitle() );
 506                 } else {
 507                         $s = $thumb->toHtml( $imgAttribs, $linkAttribs );
 508                 }
 509                 if ( '' != $align ) {
 510                         $s = "<div class=\"float{$align}\"><span>{$s}</span></div>";
 511                 }
 512                 return str_replace("\n", ' ',$prefix.$s.$postfix);
 513         }
 514
 515         /**
 516          * Make HTML for a thumbnail including image, border and caption
 517          * $img is an Image object
 518          */
 519         function makeThumbLinkObj( $img, $label = '', $alt, $align = 'right', $params = array(), $framed=false , $manual_thumb = "" ) {
 520                 global $wgStylePath, $wgContLang;
 521                 $thumbUrl = '';
 522                 $error = '';
 523
 524                 $page = isset( $params['page'] ) ? $params['page'] : false;
 525
 526                 if ( empty( $params['width'] ) ) {
 527                         $params['width'] = 180;
 528                 }
 529                 $thumb = false;
 530                 if ( $manual_thumb != '' ) {
 531                         # Use manually specified thumbnail
 532                         $manual_title = Title::makeTitleSafe( NS_IMAGE, $manual_thumb );
 533                         if( $manual_title ) {
 534                                 $manual_img = new Image( $manual_title );
 535                                 $thumb = $manual_img->getUnscaledThumb();
 536                         }
 537                 } elseif ( $framed ) {
 538                         // Use image dimensions, don't scale
 539                         $thumb = $img->getUnscaledThumb( $page );
 540                 } else {
 541                         $thumb = $img->transform( $params );
 542                 }
 543
 544                 if ( $thumb ) {
 545                         $outerWidth = $thumb->getWidth() + 2;
 546                 } else {
 547                         $outerWidth = $params['width'] + 2;
 548                 }
 549
 550                 $query = $page ? 'page=' . urlencode( $page ) : '';
 551                 $u = $img->getTitle()->getLocalURL( $query );
 552
 553                 $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
 554                 $magnifyalign = $wgContLang->isRTL() ? 'left' : 'right';
 555                 $textalign = $wgContLang->isRTL() ? ' style="text-align:right"' : '';
 556
 557                 $s = "<div class=\"thumb t{$align}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
 558                 if ( !$thumb ) {
 559                         $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
 560                         $zoomicon = '';
 561                 } elseif( !$img->exists() ) {
 562                         $s .= $this->makeBrokenImageLinkObj( $img->getTitle() );
 563                         $zoomicon = '';
 564                 } else {
 565                         $imgAttribs = array(
 566                                 'alt' => $alt,
 567                                 'longdesc' => $u,
 568                                 'class' => 'thumbimage'
 569                         );
 570                         $linkAttribs = array(
 571                                 'href' => $u,
 572                                 'title' => $alt,
 573                                 'class' => 'internal'
 574                         );
 575
 576                         $s .= $thumb->toHtml( $imgAttribs, $linkAttribs );
 577                         if ( $framed ) {
 578                                 $zoomicon="";
 579                         } else {
 580                                 $zoomicon =  '<div class="magnify" style="float:'.$magnifyalign.'">'.
 581                                         '<a href="'.$u.'" class="internal" title="'.$more.'">'.
 582                                         '<img src="'.$wgStylePath.'/common/images/magnify-clip.png" ' .
 583                                         'width="15" height="11" alt="" /></a></div>';
 584                         }
 585                 }
 586                 $s .= '  <div class="thumbcaption"'.$textalign.'>'.$zoomicon.$label."</div></div></div>";
 587                 return str_replace("\n", ' ', $s);
 588         }
 589
 590         /**
 591          * Pass a title object, not a title string
 592          */
 593         function makeBrokenImageLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 594                 # Fail gracefully
 595                 if ( ! isset($nt) ) {
 596                         # throw new MWException();
 597                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 598                 }
 599
 600                 $fname = 'Linker::makeBrokenImageLinkObj';
 601                 wfProfileIn( $fname );
 602
 603                 $q = 'wpDestFile=' . urlencode( $nt->getDBkey() );
 604                 if ( '' != $query ) {
 605                         $q .= "&$query";
 606                 }
 607                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 608                 $url = $uploadTitle->escapeLocalURL( $q );
 609
 610                 if ( '' == $text ) {
 611                         $text = htmlspecialchars( $nt->getPrefixedText() );
 612                 }
 613                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 614                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 615                 $s = "<a href=\"{$url}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 616
 617                 wfProfileOut( $fname );
 618                 return $s;
 619         }
 620
 621         /** @todo document */
 622         function makeMediaLink( $name, /* wtf?! */ $url, $alt = '' ) {
 623                 $nt = Title::makeTitleSafe( NS_IMAGE, $name );
 624                 return $this->makeMediaLinkObj( $nt, $alt );
 625         }
 626
 627         /**
 628          * Create a direct link to a given uploaded file.
 629          *
 630          * @param $title Title object.
 631          * @param $text  String: pre-sanitized HTML
 632          * @return string HTML
 633          *
 634          * @public
 635          * @todo Handle invalid or missing images better.
 636          */
 637         function makeMediaLinkObj( $title, $text = '' ) {
 638                 if( is_null( $title ) ) {
 639                         ### HOTFIX. Instead of breaking, return empty string.
 640                         return $text;
 641                 } else {
 642                         $img  = new Image( $title );
 643                         if( $img->exists() ) {
 644                                 $url  = $img->getURL();
 645                                 $class = 'internal';
 646                         } else {
 647                                 $upload = SpecialPage::getTitleFor( 'Upload' );
 648                                 $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $img->getName() ) );
 649                                 $class = 'new';
 650                         }
 651                         $alt = htmlspecialchars( $title->getText() );
 652                         if( $text == '' ) {
 653                                 $text = $alt;
 654                         }
 655                         $u = htmlspecialchars( $url );
 656                         return "<a href=\"{$u}\" class=\"$class\" title=\"{$alt}\">{$text}</a>";
 657                 }
 658         }
 659
 660         /** @todo document */
 661         function specialLink( $name, $key = '' ) {
 662                 global $wgContLang;
 663
 664                 if ( '' == $key ) { $key = strtolower( $name ); }
 665                 $pn = $wgContLang->ucfirst( $name );
 666                 return $this->makeKnownLink( $wgContLang->specialPage( $pn ),
 667                   wfMsg( $key ) );
 668         }
 669
 670         /** @todo document */
 671         function makeExternalLink( $url, $text, $escape = true, $linktype = '', $ns = null ) {
 672                 $style = $this->getExternalLinkAttributes( $url, $text, 'external ' . $linktype );
 673                 global $wgNoFollowLinks, $wgNoFollowNsExceptions;
 674                 if( $wgNoFollowLinks && !(isset($ns) && in_array($ns, $wgNoFollowNsExceptions)) ) {
 675                         $style .= ' rel="nofollow"';
 676                 }
 677                 $url = htmlspecialchars( $url );
 678                 if( $escape ) {
 679                         $text = htmlspecialchars( $text );
 680                 }
 681                 return '<a href="'.$url.'"'.$style.'>'.$text.'</a>';
 682         }
 683
 684         /**
 685          * Make user link (or user contributions for unregistered users)
 686          * @param $userId   Integer: user id in database.
 687          * @param $userText String: user name in database
 688          * @return string HTML fragment
 689          * @private
 690          */
 691         function userLink( $userId, $userText ) {
 692                 $encName = htmlspecialchars( $userText );
 693                 if( $userId == 0 ) {
 694                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 695                         return $this->makeKnownLinkObj( $contribsPage,
 696                                 $encName);
 697                 } else {
 698                         $userPage = Title::makeTitle( NS_USER, $userText );
 699                         return $this->makeLinkObj( $userPage, $encName );
 700                 }
 701         }
 702
 703         /**
 704          * @param $userId Integer: user id in database.
 705          * @param $userText String: user name in database.
 706          * @param $redContribsWhenNoEdits Bool: return a red contribs link when the user had no edits and this is true.
 707          * @return string HTML fragment with talk and/or block links
 708          */
 709         public function userToolLinks( $userId, $userText, $redContribsWhenNoEdits = false ) {
 710                 global $wgUser, $wgDisableAnonTalk, $wgSysopUserBans;
 711                 $talkable = !( $wgDisableAnonTalk && 0 == $userId );
 712                 $blockable = ( $wgSysopUserBans || 0 == $userId );
 713
 714                 $items = array();
 715                 if( $talkable ) {
 716                         $items[] = $this->userTalkLink( $userId, $userText );
 717                 }
 718                 if( $userId ) {
 719                         // check if the user has an edit
 720                         if( $redContribsWhenNoEdits && User::edits( $userId ) == 0 ) {
 721                                 $style = "class='new'";
 722                         } else {
 723                                 $style = '';
 724                         }
 725                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 726
 727                         $items[] = $this->makeKnownLinkObj( $contribsPage, wfMsgHtml( 'contribslink' ), '', '', '', '', $style );
 728                 }
 729                 if( $blockable && $wgUser->isAllowed( 'block' ) ) {
 730                         $items[] = $this->blockLink( $userId, $userText );
 731                 }
 732
 733                 if( $items ) {
 734                         return ' (' . implode( ' | ', $items ) . ')';
 735                 } else {
 736                         return '';
 737                 }
 738         }
 739
 740         /**
 741          * Alias for userToolLinks( $userId, $userText, true );
 742          */
 743         public function userToolLinksRedContribs( $userId, $userText ) {
 744                 return $this->userToolLinks( $userId, $userText, true );
 745         }
 746
 747
 748         /**
 749          * @param $userId Integer: user id in database.
 750          * @param $userText String: user name in database.
 751          * @return string HTML fragment with user talk link
 752          * @private
 753          */
 754         function userTalkLink( $userId, $userText ) {
 755                 $userTalkPage = Title::makeTitle( NS_USER_TALK, $userText );
 756                 $userTalkLink = $this->makeLinkObj( $userTalkPage, wfMsgHtml( 'talkpagelinktext' ) );
 757                 return $userTalkLink;
 758         }
 759
 760         /**
 761          * @param $userId Integer: userid
 762          * @param $userText String: user name in database.
 763          * @return string HTML fragment with block link
 764          * @private
 765          */
 766         function blockLink( $userId, $userText ) {
 767                 $blockPage = SpecialPage::getTitleFor( 'Blockip', $userText );
 768                 $blockLink = $this->makeKnownLinkObj( $blockPage,
 769                         wfMsgHtml( 'blocklink' ) );
 770                 return $blockLink;
 771         }
 772
 773         /**
 774          * Generate a user link if the current user is allowed to view it
 775          * @param $rev Revision object.
 776          * @return string HTML
 777          */
 778         function revUserLink( $rev ) {
 779                 if( $rev->userCan( Revision::DELETED_USER ) ) {
 780                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() );
 781                 } else {
 782                         $link = wfMsgHtml( 'rev-deleted-user' );
 783                 }
 784                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 785                         return '<span class="history-deleted">' . $link . '</span>';
 786                 }
 787                 return $link;
 788         }
 789
 790         /**
 791          * Generate a user tool link cluster if the current user is allowed to view it
 792          * @param $rev Revision object.
 793          * @return string HTML
 794          */
 795         function revUserTools( $rev ) {
 796                 if( $rev->userCan( Revision::DELETED_USER ) ) {
 797                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() ) .
 798                                 ' ' .
 799                                 $this->userToolLinks( $rev->getRawUser(), $rev->getRawUserText() );
 800                 } else {
 801                         $link = wfMsgHtml( 'rev-deleted-user' );
 802                 }
 803                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 804                         return '<span class="history-deleted">' . $link . '</span>';
 805                 }
 806                 return $link;
 807         }
 808
 809         /**
 810          * This function is called by all recent changes variants, by the page history,
 811          * and by the user contributions list. It is responsible for formatting edit
 812          * comments. It escapes any HTML in the comment, but adds some CSS to format
 813          * auto-generated comments (from section editing) and formats [[wikilinks]].
 814          *
 815          * @author Erik Moeller <moeller@scireview.de>
 816          *
 817          * Note: there's not always a title to pass to this function.
 818          * Since you can't set a default parameter for a reference, I've turned it
 819          * temporarily to a value pass. Should be adjusted further. --brion
 820          *
 821          * @param string $comment
 822          * @param mixed $title Title object (to generate link to the section in autocomment) or null
 823          * @param bool $local Whether section links should refer to local page
 824          */
 825         function formatComment($comment, $title = NULL, $local = false) {
 826                 wfProfileIn( __METHOD__ );
 827
 828                 global $wgContLang;
 829                 $comment = str_replace( "\n", " ", $comment );
 830                 $comment = htmlspecialchars( $comment );
 831
 832                 # The pattern for autogen comments is / * foo * /, which makes for
 833                 # some nasty regex.
 834                 # We look for all comments, match any text before and after the comment,
 835                 # add a separator where needed and format the comment itself with CSS
 836                 $match = array();
 837                 while (preg_match('/(.*)\/\*\s*(.*?)\s*\*\/(.*)/', $comment,$match)) {
 838                         $pre=$match[1];
 839                         $auto=$match[2];
 840                         $post=$match[3];
 841                         $link='';
 842                         if( $title ) {
 843                                 $section = $auto;
 844
 845                                 # Generate a valid anchor name from the section title.
 846                                 # Hackish, but should generally work - we strip wiki
 847                                 # syntax, including the magic [[: that is used to
 848                                 # "link rather than show" in case of images and
 849                                 # interlanguage links.
 850                                 $section = str_replace( '[[:', '', $section );
 851                                 $section = str_replace( '[[', '', $section );
 852                                 $section = str_replace( ']]', '', $section );
 853                                 if ( $local ) {
 854                                         $sectionTitle = Title::newFromText( '#' . $section);
 855                                 } else {
 856                                         $sectionTitle = wfClone( $title );
 857                                         $sectionTitle->mFragment = $section;
 858                                 }
 859                                 $link = $this->makeKnownLinkObj( $sectionTitle, wfMsg( 'sectionlink' ) );
 860                         }
 861                         $sep='-';
 862                         $auto=$link.$auto;
 863                         if($pre) { $auto = $sep.' '.$auto; }
 864                         if($post) { $auto .= ' '.$sep; }
 865                         $auto='<span class="autocomment">'.$auto.'</span>';
 866                         $comment=$pre.$auto.$post;
 867                 }
 868
 869                 # format regular and media links - all other wiki formatting
 870                 # is ignored
 871                 $medians = '(?:' . preg_quote( Namespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
 872                 $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
 873                 while(preg_match('/\[\[:?(.*?)(\|(.*?))*\]\](.*)$/',$comment,$match)) {
 874                         # Handle link renaming [[foo|text]] will show link as "text"
 875                         if( "" != $match[3] ) {
 876                                 $text = $match[3];
 877                         } else {
 878                                 $text = $match[1];
 879                         }
 880                         $submatch = array();
 881                         if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
 882                                 # Media link; trail not supported.
 883                                 $linkRegexp = '/\[\[(.*?)\]\]/';
 884                                 $thelink = $this->makeMediaLink( $submatch[1], "", $text );
 885                         } else {
 886                                 # Other kind of link
 887                                 if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
 888                                         $trail = $submatch[1];
 889                                 } else {
 890                                         $trail = "";
 891                                 }
 892                                 $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
 893                                 if (isset($match[1][0]) && $match[1][0] == ':')
 894                                         $match[1] = substr($match[1], 1);
 895                                 $thelink = $this->makeLink( $match[1], $text, "", $trail );
 896                         }
 897                         $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
 898                 }
 899                 wfProfileOut( __METHOD__ );
 900                 return $comment;
 901         }
 902
 903         /**
 904          * Wrap a comment in standard punctuation and formatting if
 905          * it's non-empty, otherwise return empty string.
 906          *
 907          * @param string $comment
 908          * @param mixed $title Title object (to generate link to section in autocomment) or null
 909          * @param bool $local Whether section links should refer to local page
 910          *
 911          * @return string
 912          */
 913         function commentBlock( $comment, $title = NULL, $local = false ) {
 914                 // '*' used to be the comment inserted by the software way back
 915                 // in antiquity in case none was provided, here for backwards
 916                 // compatability, acc. to brion -ævar
 917                 if( $comment == '' || $comment == '*' ) {
 918                         return '';
 919                 } else {
 920                         $formatted = $this->formatComment( $comment, $title, $local );
 921                         return " <span class=\"comment\">($formatted)</span>";
 922                 }
 923         }
 924
 925         /**
 926          * Wrap and format the given revision's comment block, if the current
 927          * user is allowed to view it.
 928          *
 929          * @param Revision $rev
 930          * @param bool $local Whether section links should refer to local page
 931          * @return string HTML
 932          */
 933         function revComment( Revision $rev, $local = false ) {
 934                 if( $rev->userCan( Revision::DELETED_COMMENT ) ) {
 935                         $block = $this->commentBlock( $rev->getRawComment(), $rev->getTitle(), $local );
 936                 } else {
 937                         $block = " <span class=\"comment\">" .
 938                                 wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
 939                 }
 940                 if( $rev->isDeleted( Revision::DELETED_COMMENT ) ) {
 941                         return " <span class=\"history-deleted\">$block</span>";
 942                 }
 943                 return $block;
 944         }
 945
 946         /** @todo document */
 947         function tocIndent() {
 948                 return "\n<ul>";
 949         }
 950
 951         /** @todo document */
 952         function tocUnindent($level) {
 953                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level>0 ? $level : 0 );
 954         }
 955
 956         /**
 957          * parameter level defines if we are on an indentation level
 958          */
 959         function tocLine( $anchor, $tocline, $tocnumber, $level ) {
 960                 return "\n<li class=\"toclevel-$level\"><a href=\"#" .
 961                         $anchor . '"><span class="tocnumber">' .
 962                         $tocnumber . '</span> <span class="toctext">' .
 963                         $tocline . '</span></a>';
 964         }
 965
 966         /** @todo document */
 967         function tocLineEnd() {
 968                 return "</li>\n";
 969         }
 970
 971         /** @todo document */
 972         function tocList($toc) {
 973                 global $wgJsMimeType;
 974                 $title =  wfMsgHtml('toc') ;
 975                 return
 976                    '<table id="toc" class="toc" summary="' . $title .'"><tr><td>'
 977                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
 978                  . $toc
 979                  # no trailing newline, script should not be wrapped in a
 980                  # paragraph
 981                  . "</ul>\n</td></tr></table>"
 982                  . '<script type="' . $wgJsMimeType . '">'
 983                  . ' if (window.showTocToggle) {'
 984                  . ' var tocShowText = "' . wfEscapeJsString( wfMsg('showtoc') ) . '";'
 985                  . ' var tocHideText = "' . wfEscapeJsString( wfMsg('hidetoc') ) . '";'
 986                  . ' showTocToggle();'
 987                  . ' } '
 988                  . "</script>\n";
 989         }
 990
 991         /** @todo document */
 992         public function editSectionLinkForOther( $title, $section ) {
 993                 global $wgContLang;
 994
 995                 $title = Title::newFromText( $title );
 996                 $editurl = '&section='.$section;
 997                 $url = $this->makeKnownLinkObj( $title, wfMsg('editsection'), 'action=edit'.$editurl );
 998
 999                 return "<span class=\"editsection\">[".$url."]</span>";
1000
1001         }
1002
1003         /**
1004          * @param $title Title object.
1005          * @param $section Integer: section number.
1006          * @param $hint Link String: title, or default if omitted or empty
1007          */
1008         public function editSectionLink( $nt, $section, $hint='' ) {
1009                 global $wgContLang;
1010
1011                 $editurl = '&section='.$section;
1012                 $hint = ( $hint=='' ) ? '' : ' title="' . wfMsgHtml( 'editsectionhint', htmlspecialchars( $hint ) ) . '"';
1013                 $url = $this->makeKnownLinkObj( $nt, wfMsg('editsection'), 'action=edit'.$editurl, '', '', '',  $hint );
1014
1015                 return "<span class=\"editsection\">[".$url."]</span>";
1016         }
1017
1018         /**
1019          * Create a headline for content
1020          *
1021          * @param int    $level   The level of the headline (1-6)
1022          * @param string $attribs Any attributes for the headline, starting with a space and ending with '>'
1023          *                        This *must* be at least '>' for no attribs
1024          * @param string $anchor  The anchor to give the headline (the bit after the #)
1025          * @param string $text    The text of the header
1026          * @param string $link    HTML to add for the section edit link
1027          *
1028          * @return string HTML headline
1029          */
1030         public function makeHeadline( $level, $attribs, $anchor, $text, $link ) {
1031                 return "<a name=\"$anchor\"></a><h$level$attribs$link <span class=\"mw-headline\">$text</span></h$level>";
1032         }
1033
1034         /**
1035          * Split a link trail, return the "inside" portion and the remainder of the trail
1036          * as a two-element array
1037          *
1038          * @static
1039          */
1040         static function splitTrail( $trail ) {
1041                 static $regex = false;
1042                 if ( $regex === false ) {
1043                         global $wgContLang;
1044                         $regex = $wgContLang->linkTrail();
1045                 }
1046                 $inside = '';
1047                 if ( '' != $trail ) {
1048                         $m = array();
1049                         if ( preg_match( $regex, $trail, $m ) ) {
1050                                 $inside = $m[1];
1051                                 $trail = $m[2];
1052                         }
1053                 }
1054                 return array( $inside, $trail );
1055         }
1056
1057         /**
1058          * Generate a rollback link for a given revision.  Currently it's the
1059          * caller's responsibility to ensure that the revision is the top one. If
1060          * it's not, of course, the user will get an error message.
1061          *
1062          * If the calling page is called with the parameter &bot=1, all rollback
1063          * links also get that parameter. It causes the edit itself and the rollback
1064          * to be marked as "bot" edits. Bot edits are hidden by default from recent
1065          * changes, so this allows sysops to combat a busy vandal without bothering
1066          * other users.
1067          *
1068          * @param Revision $rev
1069          */
1070         function generateRollback( $rev ) {
1071                 global $wgUser, $wgRequest;
1072                 $title = $rev->getTitle();
1073
1074                 $extraRollback = $wgRequest->getBool( 'bot' ) ? '&bot=1' : '';
1075                 $extraRollback .= '&token=' . urlencode(
1076                         $wgUser->editToken( array( $title->getPrefixedText(), $rev->getUserText() ) ) );
1077                 return '<span class="mw-rollback-link">['. $this->makeKnownLinkObj( $title,
1078                         wfMsg('rollbacklink'),
1079                         'action=rollback&from=' . urlencode( $rev->getUserText() ) . $extraRollback ) .']</span>';
1080         }
1081
1082         /**
1083          * Returns HTML for the "templates used on this page" list.
1084          *
1085          * @param array $templates Array of templates from Article::getUsedTemplate
1086          * or similar
1087          * @param bool $preview Whether this is for a preview
1088          * @param bool $section Whether this is for a section edit
1089          * @return string HTML output
1090          */
1091         public function formatTemplates( $templates, $preview = false, $section = false) {
1092                 global $wgUser;
1093                 wfProfileIn( __METHOD__ );
1094
1095                 $sk = $wgUser->getSkin();
1096
1097                 $outText = '';
1098                 if ( count( $templates ) > 0 ) {
1099                         # Do a batch existence check
1100                         $batch = new LinkBatch;
1101                         foreach( $templates as $title ) {
1102                                 $batch->addObj( $title );
1103                         }
1104                         $batch->execute();
1105
1106                         # Construct the HTML
1107                         $outText = '<div class="mw-templatesUsedExplanation">';
1108                         if ( $preview ) {
1109                                 $outText .= wfMsgExt( 'templatesusedpreview', array( 'parse' ) );
1110                         } elseif ( $section ) {
1111                                 $outText .= wfMsgExt( 'templatesusedsection', array( 'parse' ) );
1112                         } else {
1113                                 $outText .= wfMsgExt( 'templatesused', array( 'parse' ) );
1114                         }
1115                         $outText .= '</div><ul>';
1116
1117                         foreach ( $templates as $titleObj ) {
1118                                 $r = $titleObj->getRestrictions( 'edit' );
1119                                 if ( in_array( 'sysop', $r ) ) {
1120                                         $protected = wfMsgExt( 'template-protected', array( 'parseinline' ) );
1121                                 } elseif ( in_array( 'autoconfirmed', $r ) ) {
1122                                         $protected = wfMsgExt( 'template-semiprotected', array( 'parseinline' ) );
1123                                 } else {
1124                                         $protected = '';
1125                                 }
1126                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . ' ' . $protected . '</li>';
1127                         }
1128                         $outText .= '</ul>';
1129                 }
1130                 wfProfileOut( __METHOD__  );
1131                 return $outText;
1132         }
1133
1134         /**
1135          * Format a size in bytes for output, using an appropriate
1136          * unit (B, KB, MB or GB) according to the magnitude in question
1137          *
1138          * @param $size Size to format
1139          * @return string
1140          */
1141         public function formatSize( $size ) {
1142                 global $wgLang;
1143                 // For small sizes no decimal places necessary
1144                 $round = 0;
1145                 if( $size > 1024 ) {
1146                         $size = $size / 1024;
1147                         if( $size > 1024 ) {
1148                                 $size = $size / 1024;
1149                                 // For MB and bigger two decimal places are smarter
1150                                 $round = 2;
1151                                 if( $size > 1024 ) {
1152                                         $size = $size / 1024;
1153                                         $msg = 'size-gigabytes';
1154                                 } else {
1155                                         $msg = 'size-megabytes';
1156                                 }
1157                         } else {
1158                                 $msg = 'size-kilobytes';
1159                         }
1160                 } else {
1161                         $msg = 'size-bytes';
1162                 }
1163                 $size = round( $size, $round );
1164                 return wfMsgHtml( $msg, $wgLang->formatNum( $size ) );
1165         }
1166
1167         /**
1168          * Given the id of an interface element, constructs the appropriate title
1169          * and accesskey attributes from the system messages.  (Note, this is usu-
1170          * ally the id but isn't always, because sometimes the accesskey needs to
1171          * go on a different element than the id, for reverse-compatibility, etc.)
1172          *
1173          * @param string $name Id of the element, minus prefixes.
1174          * @return string title and accesskey attributes, ready to drop in an
1175          *   element (e.g., ' title="This does something [x]" accesskey="x"').
1176          */
1177         public function tooltipAndAccesskey($name) {
1178                 $out = '';
1179
1180                 $tooltip = wfMsg('tooltip-'.$name);
1181                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1182                         // Compatibility: formerly some tooltips had [alt-.] hardcoded
1183                         $tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
1184                         $out .= ' title="'.htmlspecialchars($tooltip);
1185                 }
1186                 $accesskey = wfMsg('accesskey-'.$name);
1187                 if ($accesskey && $accesskey != '-' && !wfEmptyMsg('accesskey-'.$name, $accesskey)) {
1188                         if ($out) $out .= " [$accesskey]\" accesskey=\"$accesskey\"";
1189                         else $out .= " title=\"[$accesskey]\" accesskey=\"$accesskey\"";
1190                 } elseif ($out) {
1191                         $out .= '"';
1192                 }
1193                 return $out;
1194         }
1195
1196         /**
1197          * Given the id of an interface element, constructs the appropriate title
1198          * attribute from the system messages.  (Note, this is usually the id but
1199          * isn't always, because sometimes the accesskey needs to go on a different
1200          * element than the id, for reverse-compatibility, etc.)
1201          *
1202          * @param string $name Id of the element, minus prefixes.
1203          * @return string title attribute, ready to drop in an element
1204          * (e.g., ' title="This does something"').
1205          */
1206         public function tooltip($name) {
1207                 $out = '';
1208
1209                 $tooltip = wfMsg('tooltip-'.$name);
1210                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1211                         $out = ' title="'.htmlspecialchars($tooltip).'"';
1212                 }
1213
1214                 return $out;
1215         }
1216 }
1217
1218 ?>