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  * For the moment, Skin is a descendent class of Linker.
   8  * In the future, it should probably be further split
   9  * so that ever other bit of the wiki doesn't have to
  10  * go loading up Skin to get at it.
  11  *
  12  * @addtogroup Skins
  13  */
  14 class Linker {
  15         function __construct() {}
  16
  17         /**
  18          * @deprecated
  19          */
  20         function postParseLinkColour( $s = NULL ) {
  21                 return NULL;
  22         }
  23
  24         /** @todo document */
  25         function getExternalLinkAttributes( $link, $text, $class='' ) {
  26                 $link = htmlspecialchars( $link );
  27
  28                 $r = ($class != '') ? " class=\"$class\"" : " class=\"external\"";
  29
  30                 $r .= " title=\"{$link}\"";
  31                 return $r;
  32         }
  33
  34         function getInterwikiLinkAttributes( $link, $text, $class='' ) {
  35                 global $wgContLang;
  36
  37                 $link = urldecode( $link );
  38                 $link = $wgContLang->checkTitleEncoding( $link );
  39                 $link = preg_replace( '/[\\x00-\\x1f]/', ' ', $link );
  40                 $link = htmlspecialchars( $link );
  41
  42                 $r = ($class != '') ? " class=\"$class\"" : " class=\"external\"";
  43
  44                 $r .= " title=\"{$link}\"";
  45                 return $r;
  46         }
  47
  48         /** @todo document */
  49         function getInternalLinkAttributes( $link, $text, $broken = false ) {
  50                 $link = urldecode( $link );
  51                 $link = str_replace( '_', ' ', $link );
  52                 $link = htmlspecialchars( $link );
  53
  54                 if( $broken == 'stub' ) {
  55                         $r = ' class="stub"';
  56                 } else if ( $broken == 'yes' ) {
  57                         $r = ' class="new"';
  58                 } else {
  59                         $r = '';
  60                 }
  61
  62                 $r .= " title=\"{$link}\"";
  63                 return $r;
  64         }
  65
  66         /**
  67          * @param $nt Title object.
  68          * @param $text String: FIXME
  69          * @param $broken Boolean: FIXME, default 'false'.
  70          */
  71         function getInternalLinkAttributesObj( &$nt, $text, $broken = false ) {
  72                 if( $broken == 'stub' ) {
  73                         $r = ' class="stub"';
  74                 } else if ( $broken == 'yes' ) {
  75                         $r = ' class="new"';
  76                 } else {
  77                         $r = '';
  78                 }
  79
  80                 $r .= ' title="' . $nt->getEscapedText() . '"';
  81                 return $r;
  82         }
  83
  84         /**
  85          * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
  86          * it if you already have a title object handy. See makeLinkObj for further documentation.
  87          *
  88          * @param $title String: the text of the title
  89          * @param $text  String: link text
  90          * @param $query String: optional query part
  91          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
  92          *                      be included in the link text. Other characters will be appended after
  93          *                      the end of the link.
  94          */
  95         function makeLink( $title, $text = '', $query = '', $trail = '' ) {
  96                 wfProfileIn( 'Linker::makeLink' );
  97                 $nt = Title::newFromText( $title );
  98                 if ($nt) {
  99                         $result = $this->makeLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 100                 } else {
 101                         wfDebug( 'Invalid title passed to Linker::makeLink(): "'.$title."\"\n" );
 102                         $result = $text == "" ? $title : $text;
 103                 }
 104
 105                 wfProfileOut( 'Linker::makeLink' );
 106                 return $result;
 107         }
 108
 109         /**
 110          * This function is a shortcut to makeKnownLinkObj(Title::newFromText($title),...). Do not call
 111          * it if you already have a title object handy. See makeKnownLinkObj for further documentation.
 112          *
 113          * @param $title String: the text of the title
 114          * @param $text  String: link text
 115          * @param $query String: optional query part
 116          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 117          *                      be included in the link text. Other characters will be appended after
 118          *                      the end of the link.
 119          */
 120         function makeKnownLink( $title, $text = '', $query = '', $trail = '', $prefix = '',$aprops = '') {
 121                 $nt = Title::newFromText( $title );
 122                 if ($nt) {
 123                         return $this->makeKnownLinkObj( Title::newFromText( $title ), $text, $query, $trail, $prefix , $aprops );
 124                 } else {
 125                         wfDebug( 'Invalid title passed to Linker::makeKnownLink(): "'.$title."\"\n" );
 126                         return $text == '' ? $title : $text;
 127                 }
 128         }
 129
 130         /**
 131          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
 132          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
 133          *
 134          * @param string $title The text of the title
 135          * @param string $text Link text
 136          * @param string $query Optional query part
 137          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 138          *                      be included in the link text. Other characters will be appended after
 139          *                      the end of the link.
 140          */
 141         function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
 142                 $nt = Title::newFromText( $title );
 143                 if ($nt) {
 144                         return $this->makeBrokenLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 145                 } else {
 146                         wfDebug( 'Invalid title passed to Linker::makeBrokenLink(): "'.$title."\"\n" );
 147                         return $text == '' ? $title : $text;
 148                 }
 149         }
 150
 151         /**
 152          * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
 153          * it if you already have a title object handy. See makeStubLinkObj for further documentation.
 154          *
 155          * @param $title String: the text of the title
 156          * @param $text  String: link text
 157          * @param $query String: optional query part
 158          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 159          *                      be included in the link text. Other characters will be appended after
 160          *                      the end of the link.
 161          */
 162         function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
 163                 $nt = Title::newFromText( $title );
 164                 if ($nt) {
 165                         return $this->makeStubLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 166                 } else {
 167                         wfDebug( 'Invalid title passed to Linker::makeStubLink(): "'.$title."\"\n" );
 168                         return $text == '' ? $title : $text;
 169                 }
 170         }
 171
 172         /**
 173          * Make a link for a title which may or may not be in the database. If you need to
 174          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
 175          * call to this will result in a DB query.
 176          *
 177          * @param $nt     Title: the title object to make the link from, e.g. from
 178          *                      Title::newFromText.
 179          * @param $text  String: link text
 180          * @param $query String: optional query part
 181          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 182          *                      be included in the link text. Other characters will be appended after
 183          *                      the end of the link.
 184          * @param $prefix String: optional prefix. As trail, only before instead of after.
 185          */
 186         function makeLinkObj( $nt, $text= '', $query = '', $trail = '', $prefix = '' ) {
 187                 global $wgUser;
 188                 $fname = 'Linker::makeLinkObj';
 189                 wfProfileIn( $fname );
 190
 191                 # Fail gracefully
 192                 if ( ! is_object($nt) ) {
 193                         # throw new MWException();
 194                         wfProfileOut( $fname );
 195                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 196                 }
 197
 198                 if ( $nt->isExternal() ) {
 199                         $u = $nt->getFullURL();
 200                         $link = $nt->getPrefixedURL();
 201                         if ( '' == $text ) { $text = $nt->getPrefixedText(); }
 202                         $style = $this->getInterwikiLinkAttributes( $link, $text, 'extiw' );
 203
 204                         $inside = '';
 205                         if ( '' != $trail ) {
 206                                 $m = array();
 207                                 if ( preg_match( '/^([a-z]+)(.*)$$/sD', $trail, $m ) ) {
 208                                         $inside = $m[1];
 209                                         $trail = $m[2];
 210                                 }
 211                         }
 212                         $t = "<a href=\"{$u}\"{$style}>{$text}{$inside}</a>";
 213
 214                         wfProfileOut( $fname );
 215                         return $t;
 216                 } elseif ( $nt->isAlwaysKnown() ) {
 217                         # Image links, special page links and self-links with fragements are always known.
 218                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 219                 } else {
 220                         wfProfileIn( $fname.'-immediate' );
 221
 222                         # Handles links to special pages wich do not exist in the database:
 223                         if( $nt->getNamespace() == NS_SPECIAL ) {
 224                                 if( SpecialPage::exists( $nt->getDbKey() ) ) {
 225                                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 226                                 } else {
 227                                         $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 228                                 }
 229                                 wfProfileOut( $fname.'-immediate' );
 230                                 wfProfileOut( $fname );
 231                                 return $retVal;
 232                         }
 233
 234                         # Work out link colour immediately
 235                         $aid = $nt->getArticleID() ;
 236                         if ( 0 == $aid ) {
 237                                 $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 238                         } else {
 239                                 $stub = false;
 240                                 if ( $nt->isContentPage() ) {
 241                                         $threshold = $wgUser->getOption('stubthreshold');
 242                                         if ( $threshold > 0 ) {
 243                                                 $dbr = wfGetDB( DB_SLAVE );
 244                                                 $s = $dbr->selectRow(
 245                                                         array( 'page' ),
 246                                                         array( 'page_len',
 247                                                                'page_is_redirect' ),
 248                                                         array( 'page_id' => $aid ), $fname ) ;
 249                                                 $stub = ( $s !== false && !$s->page_is_redirect &&
 250                                                           $s->page_len < $threshold );
 251                                         }
 252                                 }
 253                                 if ( $stub ) {
 254                                         $retVal = $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 255                                 } else {
 256                                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 257                                 }
 258                         }
 259                         wfProfileOut( $fname.'-immediate' );
 260                 }
 261                 wfProfileOut( $fname );
 262                 return $retVal;
 263         }
 264
 265         /**
 266          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
 267          * it doesn't have to do a database query. It's also valid for interwiki titles and special
 268          * pages.
 269          *
 270          * @param $nt Title object of target page
 271          * @param $text   String: text to replace the title
 272          * @param $query  String: link target
 273          * @param $trail  String: text after link
 274          * @param $prefix String: text before link text
 275          * @param $aprops String: extra attributes to the a-element
 276          * @param $style  String: style to apply - if empty, use getInternalLinkAttributesObj instead
 277          * @return the a-element
 278          */
 279         function makeKnownLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = '' ) {
 280
 281                 $fname = 'Linker::makeKnownLinkObj';
 282                 wfProfileIn( $fname );
 283
 284                 if ( !is_object( $nt ) ) {
 285                         wfProfileOut( $fname );
 286                         return $text;
 287                 }
 288
 289                 $u = $nt->escapeLocalURL( $query );
 290                 if ( $nt->getFragment() != '' ) {
 291                         if( $nt->getPrefixedDbkey() == '' ) {
 292                                 $u = '';
 293                                 if ( '' == $text ) {
 294                                         $text = htmlspecialchars( $nt->getFragment() );
 295                                 }
 296                         }
 297                         $u .= $nt->getFragmentForURL();
 298                 }
 299                 if ( $text == '' ) {
 300                         $text = htmlspecialchars( $nt->getPrefixedText() );
 301                 }
 302                 if ( $style == '' ) {
 303                         $style = $this->getInternalLinkAttributesObj( $nt, $text );
 304                 }
 305
 306                 if ( $aprops !== '' ) $aprops = ' ' . $aprops;
 307
 308                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 309                 $r = "<a href=\"{$u}\"{$style}{$aprops}>{$prefix}{$text}{$inside}</a>{$trail}";
 310                 wfProfileOut( $fname );
 311                 return $r;
 312         }
 313
 314         /**
 315          * Make a red link to the edit page of a given title.
 316          *
 317          * @param $title String: The text of the title
 318          * @param $text  String: Link text
 319          * @param $query String: Optional query part
 320          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
 321          *                      be included in the link text. Other characters will be appended after
 322          *                      the end of the link.
 323          */
 324         function makeBrokenLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 325                 # Fail gracefully
 326                 if ( ! isset($nt) ) {
 327                         # throw new MWException();
 328                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 329                 }
 330
 331                 $fname = 'Linker::makeBrokenLinkObj';
 332                 wfProfileIn( $fname );
 333
 334                 if( $nt->getNamespace() == NS_SPECIAL ) {
 335                         $q = $query;
 336                 } else if ( '' == $query ) {
 337                         $q = 'action=edit';
 338                 } else {
 339                         $q = 'action=edit&'.$query;
 340                 }
 341                 $u = $nt->escapeLocalURL( $q );
 342
 343                 if ( '' == $text ) {
 344                         $text = htmlspecialchars( $nt->getPrefixedText() );
 345                 }
 346                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 347
 348                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 349                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 350
 351                 wfProfileOut( $fname );
 352                 return $s;
 353         }
 354
 355         /**
 356          * Make a brown link to a short article.
 357          *
 358          * @param $title String: the text of the title
 359          * @param $text  String: link text
 360          * @param $query String: optional query part
 361          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 362          *                      be included in the link text. Other characters will be appended after
 363          *                      the end of the link.
 364          */
 365         function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 366                 $style = $this->getInternalLinkAttributesObj( $nt, $text, 'stub' );
 367                 return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix, '', $style );
 368         }
 369
 370         /**
 371          * Generate either a normal exists-style link or a stub link, depending
 372          * on the given page size.
 373          *
 374          * @param $size Integer
 375          * @param $nt Title object.
 376          * @param $text String
 377          * @param $query String
 378          * @param $trail String
 379          * @param $prefix String
 380          * @return string HTML of link
 381          */
 382         function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 383                 global $wgUser;
 384                 $threshold = intval( $wgUser->getOption( 'stubthreshold' ) );
 385                 if( $size < $threshold ) {
 386                         return $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 387                 } else {
 388                         return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 389                 }
 390         }
 391
 392         /**
 393          * Make appropriate markup for a link to the current article. This is currently rendered
 394          * as the bold link text. The calling sequence is the same as the other make*LinkObj functions,
 395          * despite $query not being used.
 396          */
 397         function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 398                 if ( '' == $text ) {
 399                         $text = htmlspecialchars( $nt->getPrefixedText() );
 400                 }
 401                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 402                 return "<strong class=\"selflink\">{$prefix}{$text}{$inside}</strong>{$trail}";
 403         }
 404
 405         /** @todo document */
 406         function fnamePart( $url ) {
 407                 $basename = strrchr( $url, '/' );
 408                 if ( false === $basename ) {
 409                         $basename = $url;
 410                 } else {
 411                         $basename = substr( $basename, 1 );
 412                 }
 413                 return htmlspecialchars( $basename );
 414         }
 415
 416         /** Obsolete alias */
 417         function makeImage( $url, $alt = '' ) {
 418                 return $this->makeExternalImage( $url, $alt );
 419         }
 420
 421         /** @todo document */
 422         function makeExternalImage( $url, $alt = '' ) {
 423                 if ( '' == $alt ) {
 424                         $alt = $this->fnamePart( $url );
 425                 }
 426                 $s = '<img src="'.$url.'" alt="'.$alt.'" />';
 427                 return $s;
 428         }
 429
 430         /** Creates the HTML source for images
 431         * @param object $nt
 432         * @param string $label label text
 433         * @param string $alt alt text
 434         * @param string $align horizontal alignment: none, left, center, right)
 435         * @param array $params some format keywords: width, height, page, upright, upright_factor, frameless, border
 436         * @param boolean $framed shows image in original size in a frame
 437         * @param boolean $thumb shows image as thumbnail in a frame
 438         * @param string $manual_thumb image name for the manual thumbnail
 439         * @param string $valign vertical alignment: baseline, sub, super, top, text-top, middle, bottom, text-bottom
 440         * @return string
 441         */
 442         function makeImageLinkObj( $nt, $label, $alt, $align = '', $params = array(), $framed = false,
 443           $thumb = false, $manual_thumb = '', $valign = '', $time = false )
 444         {
 445                 global $wgContLang, $wgUser, $wgThumbLimits, $wgThumbUpright;
 446
 447                 $img = wfFindFile( $nt, $time );
 448
 449                 if ( $img && !$img->allowInlineDisplay() ) {
 450                         wfDebug( __METHOD__.': '.$nt->getPrefixedDBkey()." does not allow inline display\n" );
 451                         return $this->makeKnownLinkObj( $nt );
 452                 }
 453
 454                 $error = $prefix = $postfix = '';
 455                 $page = isset( $params['page'] ) ? $params['page'] : false;
 456
 457                 if ( 'center' == $align )
 458                 {
 459                         $prefix  = '<div class="center">';
 460                         $postfix = '</div>';
 461                         $align   = 'none';
 462                 }
 463                 if ( $img && !isset( $params['width'] ) ) {
 464                         $params['width'] = $img->getWidth( $page );
 465                         if( $thumb || $framed || isset( $params['frameless'] ) ) {
 466                                 $wopt = $wgUser->getOption( 'thumbsize' );
 467
 468                                 if( !isset( $wgThumbLimits[$wopt] ) ) {
 469                                          $wopt = User::getDefaultOption( 'thumbsize' );
 470                                 }
 471
 472                                 // Reduce width for upright images when parameter 'upright' is used
 473                                 if ( !isset( $params['upright_factor'] ) || $params['upright_factor'] == 0 ) {
 474                                         $params['upright_factor'] = $wgThumbUpright;
 475                                 }
 476                                 // Use width which is smaller: real image width or user preference width
 477                                 // For caching health: If width scaled down due to upright parameter, round to full __0 pixel to avoid the creation of a lot of odd thumbs
 478                                 $params['width'] = min( $params['width'], isset( $params['upright'] ) ? round( $wgThumbLimits[$wopt] * $params['upright_factor'], -1 ) : $wgThumbLimits[$wopt] );
 479                         }
 480                 }
 481
 482                 if ( $thumb || $framed ) {
 483
 484                         # Create a thumbnail. Alignment depends on language
 485                         # writing direction, # right aligned for left-to-right-
 486                         # languages ("Western languages"), left-aligned
 487                         # for right-to-left-languages ("Semitic languages")
 488                         #
 489                         # If  thumbnail width has not been provided, it is set
 490                         # to the default user option as specified in Language*.php
 491                         if ( $align == '' ) {
 492                                 $align = $wgContLang->isRTL() ? 'left' : 'right';
 493                         }
 494                         return $prefix.$this->makeThumbLinkObj( $nt, $img, $label, $alt, $align, $params, $framed, $manual_thumb ).$postfix;
 495                 }
 496
 497                 if ( $img && $params['width'] ) {
 498                         # Create a resized image, without the additional thumbnail features
 499                         $thumb = $img->transform( $params );
 500                 } else {
 501                         $thumb = false;
 502                 }
 503
 504                 if ( $page ) {
 505                         $query = 'page=' . urlencode( $page );
 506                 } else {
 507                         $query = '';
 508                 }
 509                 $u = $nt->getLocalURL( $query );
 510                 $imgAttribs = array(
 511                         'alt' => $alt,
 512                         'longdesc' => $u
 513                 );
 514
 515                 if ( $valign ) {
 516                         $imgAttribs['style'] = "vertical-align: $valign";
 517                 }
 518                 if ( isset( $params['border'] ) ) {
 519                         $imgAttribs['class'] = "thumbborder";
 520                 }
 521                 $linkAttribs = array(
 522                         'href' => $u,
 523                         'class' => 'image',
 524                         'title' => $alt
 525                 );
 526
 527                 if ( !$thumb ) {
 528                         $s = $this->makeBrokenImageLinkObj( $nt );
 529                 } else {
 530                         $s = $thumb->toHtml( $imgAttribs, $linkAttribs );
 531                 }
 532                 if ( '' != $align ) {
 533                         $s = "<div class=\"float{$align}\"><span>{$s}</span></div>";
 534                 }
 535                 return str_replace("\n", ' ',$prefix.$s.$postfix);
 536         }
 537
 538         /**
 539          * Make HTML for a thumbnail including image, border and caption
 540          * @param Title $nt
 541          * @param Image $img Image object or false if it doesn't exist
 542          */
 543         function makeThumbLinkObj( Title $nt, $img, $label = '', $alt, $align = 'right', $params = array(), $framed=false , $manual_thumb = "" ) {
 544                 global $wgStylePath, $wgContLang;
 545                 $exists = $img && $img->exists();
 546
 547                 $page = isset( $params['page'] ) ? $params['page'] : false;
 548
 549                 if ( empty( $params['width'] ) ) {
 550                         // Reduce width for upright images when parameter 'upright' is used
 551                         $params['width'] = isset( $params['upright'] ) ? 130 : 180;
 552                 }
 553                 $thumb = false;
 554
 555                 if ( !$exists ) {
 556                         $outerWidth = $params['width'] + 2;
 557                 } else {
 558                         if ( $manual_thumb != '' ) {
 559                                 # Use manually specified thumbnail
 560                                 $manual_title = Title::makeTitleSafe( NS_IMAGE, $manual_thumb );
 561                                 if( $manual_title ) {
 562                                         $manual_img = wfFindFile( $manual_title );
 563                                         if ( $manual_img ) {
 564                                                 $thumb = $manual_img->getUnscaledThumb();
 565                                         } else {
 566                                                 $exists = false;
 567                                         }
 568                                 }
 569                         } elseif ( $framed ) {
 570                                 // Use image dimensions, don't scale
 571                                 $thumb = $img->getUnscaledThumb( $page );
 572                         } else {
 573                                 # Do not present an image bigger than the source, for bitmap-style images
 574                                 # This is a hack to maintain compatibility with arbitrary pre-1.10 behaviour
 575                                 $srcWidth = $img->getWidth( $page );
 576                                 if ( $srcWidth && !$img->mustRender() && $params['width'] > $srcWidth ) {
 577                                         $params['width'] = $srcWidth;
 578                                 }
 579                                 $thumb = $img->transform( $params );
 580                         }
 581
 582                         if ( $thumb ) {
 583                                 $outerWidth = $thumb->getWidth() + 2;
 584                         } else {
 585                                 $outerWidth = $params['width'] + 2;
 586                         }
 587                 }
 588
 589                 $query = $page ? 'page=' . urlencode( $page ) : '';
 590                 $u = $nt->getLocalURL( $query );
 591
 592                 $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
 593                 $magnifyalign = $wgContLang->isRTL() ? 'left' : 'right';
 594                 $textalign = $wgContLang->isRTL() ? ' style="text-align:right"' : '';
 595
 596                 $s = "<div class=\"thumb t{$align}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
 597                 if( !$exists ) {
 598                         $s .= $this->makeBrokenImageLinkObj( $nt );
 599                         $zoomicon = '';
 600                 } elseif ( !$thumb ) {
 601                         $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
 602                         $zoomicon = '';
 603                 } else {
 604                         $imgAttribs = array(
 605                                 'alt' => $alt,
 606                                 'longdesc' => $u,
 607                                 'class' => 'thumbimage'
 608                         );
 609                         $linkAttribs = array(
 610                                 'href' => $u,
 611                                 'class' => 'internal',
 612                                 'title' => $alt
 613                         );
 614
 615                         $s .= $thumb->toHtml( $imgAttribs, $linkAttribs );
 616                         if ( $framed ) {
 617                                 $zoomicon="";
 618                         } else {
 619                                 $zoomicon =  '<div class="magnify" style="float:'.$magnifyalign.'">'.
 620                                         '<a href="'.$u.'" class="internal" title="'.$more.'">'.
 621                                         '<img src="'.$wgStylePath.'/common/images/magnify-clip.png" ' .
 622                                         'width="15" height="11" alt="" /></a></div>';
 623                         }
 624                 }
 625                 $s .= '  <div class="thumbcaption"'.$textalign.'>'.$zoomicon.$label."</div></div></div>";
 626                 return str_replace("\n", ' ', $s);
 627         }
 628
 629         /**
 630          * Make a "broken" link to an image
 631          *
 632          * @param Title $title Image title
 633          * @param string $text Link label
 634          * @param string $query Query string
 635          * @param string $trail Link trail
 636          * @param string $prefix Link prefix
 637          * @return string
 638          */
 639         public function makeBrokenImageLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '' ) {
 640                 global $wgEnableUploads;
 641                 if( $title instanceof Title ) {
 642                         wfProfileIn( __METHOD__ );
 643                         if( $wgEnableUploads ) {
 644                                 $upload = SpecialPage::getTitleFor( 'Upload' );
 645                                 if( $text == '' )
 646                                         $text = htmlspecialchars( $title->getPrefixedText() );
 647                                 $q = 'wpDestFile=' . $title->getPartialUrl();
 648                                 if( $query != '' )
 649                                         $q .= '&' . $query;
 650                                 list( $inside, $trail ) = self::splitTrail( $trail );
 651                                 $style = $this->getInternalLinkAttributesObj( $title, $text, 'yes' );
 652                                 wfProfileOut( __METHOD__ );
 653                                 return '<a href="' . $upload->escapeLocalUrl( $q ) . '"'
 654                                         . $style . '>' . $prefix . $text . $inside . '</a>' . $trail;
 655                         } else {
 656                                 wfProfileOut( __METHOD__ );
 657                                 return $this->makeKnownLinkObj( $title, $text, $query, $trail, $prefix );
 658                         }
 659                 } else {
 660                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 661                 }
 662         }
 663
 664         /** @deprecated use Linker::makeMediaLinkObj() */
 665         function makeMediaLink( $name, $unused = '', $text = '' ) {
 666                 $nt = Title::makeTitleSafe( NS_IMAGE, $name );
 667                 return $this->makeMediaLinkObj( $nt, $text );
 668         }
 669
 670         /**
 671          * Create a direct link to a given uploaded file.
 672          *
 673          * @param $title Title object.
 674          * @param $text  String: pre-sanitized HTML
 675          * @return string HTML
 676          *
 677          * @public
 678          * @todo Handle invalid or missing images better.
 679          */
 680         function makeMediaLinkObj( $title, $text = '' ) {
 681                 if( is_null( $title ) ) {
 682                         ### HOTFIX. Instead of breaking, return empty string.
 683                         return $text;
 684                 } else {
 685                         $img  = wfFindFile( $title );
 686                         if( $img ) {
 687                                 $url  = $img->getURL();
 688                                 $class = 'internal';
 689                         } else {
 690                                 $upload = SpecialPage::getTitleFor( 'Upload' );
 691                                 $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $title->getDbKey() ) );
 692                                 $class = 'new';
 693                         }
 694                         $alt = htmlspecialchars( $title->getText() );
 695                         if( $text == '' ) {
 696                                 $text = $alt;
 697                         }
 698                         $u = htmlspecialchars( $url );
 699                         return "<a href=\"{$u}\" class=\"$class\" title=\"{$alt}\">{$text}</a>";
 700                 }
 701         }
 702
 703         /** @todo document */
 704         function specialLink( $name, $key = '' ) {
 705                 global $wgContLang;
 706
 707                 if ( '' == $key ) { $key = strtolower( $name ); }
 708                 $pn = $wgContLang->ucfirst( $name );
 709                 return $this->makeKnownLink( $wgContLang->specialPage( $pn ),
 710                   wfMsg( $key ) );
 711         }
 712
 713         /** @todo document */
 714         function makeExternalLink( $url, $text, $escape = true, $linktype = '', $ns = null ) {
 715                 $style = $this->getExternalLinkAttributes( $url, $text, 'external ' . $linktype );
 716                 global $wgNoFollowLinks, $wgNoFollowNsExceptions;
 717                 if( $wgNoFollowLinks && !(isset($ns) && in_array($ns, $wgNoFollowNsExceptions)) ) {
 718                         $style .= ' rel="nofollow"';
 719                 }
 720                 $url = htmlspecialchars( $url );
 721                 if( $escape ) {
 722                         $text = htmlspecialchars( $text );
 723                 }
 724                 return '<a href="'.$url.'"'.$style.'>'.$text.'</a>';
 725         }
 726
 727         /**
 728          * Make user link (or user contributions for unregistered users)
 729          * @param $userId   Integer: user id in database.
 730          * @param $userText String: user name in database
 731          * @return string HTML fragment
 732          * @private
 733          */
 734         function userLink( $userId, $userText ) {
 735                 $encName = htmlspecialchars( $userText );
 736                 if( $userId == 0 ) {
 737                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 738                         return $this->makeKnownLinkObj( $contribsPage,
 739                                 $encName);
 740                 } else {
 741                         $userPage = Title::makeTitle( NS_USER, $userText );
 742                         return $this->makeLinkObj( $userPage, $encName );
 743                 }
 744         }
 745
 746         /**
 747          * @param $userId Integer: user id in database.
 748          * @param $userText String: user name in database.
 749          * @param $redContribsWhenNoEdits Bool: return a red contribs link when the user had no edits and this is true.
 750          * @return string HTML fragment with talk and/or block links
 751          */
 752         public function userToolLinks( $userId, $userText, $redContribsWhenNoEdits = false ) {
 753                 global $wgUser, $wgDisableAnonTalk, $wgSysopUserBans;
 754                 $talkable = !( $wgDisableAnonTalk && 0 == $userId );
 755                 $blockable = ( $wgSysopUserBans || 0 == $userId );
 756
 757                 $items = array();
 758                 if( $talkable ) {
 759                         $items[] = $this->userTalkLink( $userId, $userText );
 760                 }
 761                 if( $userId ) {
 762                         // check if the user has an edit
 763                         if( $redContribsWhenNoEdits && User::edits( $userId ) == 0 ) {
 764                                 $style = " class='new'";
 765                         } else {
 766                                 $style = '';
 767                         }
 768                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 769
 770                         $items[] = $this->makeKnownLinkObj( $contribsPage, wfMsgHtml( 'contribslink' ), '', '', '', '', $style );
 771                 }
 772                 if( $blockable && $wgUser->isAllowed( 'block' ) ) {
 773                         $items[] = $this->blockLink( $userId, $userText );
 774                 }
 775
 776                 if( $items ) {
 777                         return ' (' . implode( ' | ', $items ) . ')';
 778                 } else {
 779                         return '';
 780                 }
 781         }
 782
 783         /**
 784          * Alias for userToolLinks( $userId, $userText, true );
 785          */
 786         public function userToolLinksRedContribs( $userId, $userText ) {
 787                 return $this->userToolLinks( $userId, $userText, true );
 788         }
 789
 790
 791         /**
 792          * @param $userId Integer: user id in database.
 793          * @param $userText String: user name in database.
 794          * @return string HTML fragment with user talk link
 795          * @private
 796          */
 797         function userTalkLink( $userId, $userText ) {
 798                 $userTalkPage = Title::makeTitle( NS_USER_TALK, $userText );
 799                 $userTalkLink = $this->makeLinkObj( $userTalkPage, wfMsgHtml( 'talkpagelinktext' ) );
 800                 return $userTalkLink;
 801         }
 802
 803         /**
 804          * @param $userId Integer: userid
 805          * @param $userText String: user name in database.
 806          * @return string HTML fragment with block link
 807          * @private
 808          */
 809         function blockLink( $userId, $userText ) {
 810                 $blockPage = SpecialPage::getTitleFor( 'Blockip', $userText );
 811                 $blockLink = $this->makeKnownLinkObj( $blockPage,
 812                         wfMsgHtml( 'blocklink' ) );
 813                 return $blockLink;
 814         }
 815
 816         /**
 817          * Generate a user link if the current user is allowed to view it
 818          * @param $rev Revision object.
 819          * @return string HTML
 820          */
 821         function revUserLink( $rev ) {
 822                 if( $rev->userCan( Revision::DELETED_USER ) ) {
 823                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() );
 824                 } else {
 825                         $link = wfMsgHtml( 'rev-deleted-user' );
 826                 }
 827                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 828                         return '<span class="history-deleted">' . $link . '</span>';
 829                 }
 830                 return $link;
 831         }
 832
 833         /**
 834          * Generate a user tool link cluster if the current user is allowed to view it
 835          * @param $rev Revision object.
 836          * @return string HTML
 837          */
 838         function revUserTools( $rev ) {
 839                 if( $rev->userCan( Revision::DELETED_USER ) ) {
 840                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() ) .
 841                                 ' ' .
 842                                 $this->userToolLinks( $rev->getRawUser(), $rev->getRawUserText() );
 843                 } else {
 844                         $link = wfMsgHtml( 'rev-deleted-user' );
 845                 }
 846                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 847                         return '<span class="history-deleted">' . $link . '</span>';
 848                 }
 849                 return $link;
 850         }
 851
 852         /**
 853          * This function is called by all recent changes variants, by the page history,
 854          * and by the user contributions list. It is responsible for formatting edit
 855          * comments. It escapes any HTML in the comment, but adds some CSS to format
 856          * auto-generated comments (from section editing) and formats [[wikilinks]].
 857          *
 858          * @author Erik Moeller <moeller@scireview.de>
 859          *
 860          * Note: there's not always a title to pass to this function.
 861          * Since you can't set a default parameter for a reference, I've turned it
 862          * temporarily to a value pass. Should be adjusted further. --brion
 863          *
 864          * @param string $comment
 865          * @param mixed $title Title object (to generate link to the section in autocomment) or null
 866          * @param bool $local Whether section links should refer to local page
 867          */
 868         function formatComment($comment, $title = NULL, $local = false) {
 869                 wfProfileIn( __METHOD__ );
 870
 871                 # Sanitize text a bit:
 872                 $comment = str_replace( "\n", " ", $comment );
 873                 $comment = htmlspecialchars( $comment );
 874
 875                 # Render autocomments and make links:
 876                 $comment = $this->formatAutoComments( $comment, $title, $local );
 877                 $comment = $this->formatLinksInComment( $comment );
 878
 879                 wfProfileOut( __METHOD__ );
 880                 return $comment;
 881         }
 882
 883         /**
 884          * The pattern for autogen comments is / * foo * /, which makes for
 885          * some nasty regex.
 886          * We look for all comments, match any text before and after the comment,
 887          * add a separator where needed and format the comment itself with CSS
 888          * Called by Linker::formatComment.
 889          *
 890          * @param $comment Comment text
 891          * @param $title An optional title object used to links to sections
 892          *
 893          * @todo Document the $local parameter.
 894          */
 895         private function formatAutocomments( $comment, $title = NULL, $local = false ) {
 896                 $match = array();
 897                 while (preg_match('!(.*)/\*\s*(.*?)\s*\*/(.*)!', $comment,$match)) {
 898                         $pre=$match[1];
 899                         $auto=$match[2];
 900                         $post=$match[3];
 901                         $link='';
 902                         if( $title ) {
 903                                 $section = $auto;
 904
 905                                 # Generate a valid anchor name from the section title.
 906                                 # Hackish, but should generally work - we strip wiki
 907                                 # syntax, including the magic [[: that is used to
 908                                 # "link rather than show" in case of images and
 909                                 # interlanguage links.
 910                                 $section = str_replace( '[[:', '', $section );
 911                                 $section = str_replace( '[[', '', $section );
 912                                 $section = str_replace( ']]', '', $section );
 913                                 if ( $local ) {
 914                                         $sectionTitle = Title::newFromText( '#' . $section);
 915                                 } else {
 916                                         $sectionTitle = wfClone( $title );
 917                                         $sectionTitle->mFragment = $section;
 918                                 }
 919                                 $link = $this->makeKnownLinkObj( $sectionTitle, wfMsg( 'sectionlink' ) );
 920                         }
 921                         $sep='-';
 922                         $auto=$link.$auto;
 923                         if($pre) { $auto = $sep.' '.$auto; }
 924                         if($post) { $auto .= ' '.$sep; }
 925                         $auto='<span class="autocomment">'.$auto.'</span>';
 926                         $comment=$pre.$auto.$post;
 927                 }
 928
 929                 return $comment;
 930         }
 931
 932         /**
 933          * Formats wiki links and media links in text; all other wiki formatting
 934          * is ignored
 935          *
 936          * @param string $comment Text to format links in
 937          * @return string
 938          */
 939         public function formatLinksInComment( $comment ) {
 940                 global $wgContLang;
 941
 942                 $medians = '(?:' . preg_quote( Namespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
 943                 $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
 944
 945                 while(preg_match('/\[\[:?(.*?)(\|(.*?))*\]\](.*)$/',$comment,$match)) {
 946                         # Handle link renaming [[foo|text]] will show link as "text"
 947                         if( "" != $match[3] ) {
 948                                 $text = $match[3];
 949                         } else {
 950                                 $text = $match[1];
 951                         }
 952                         $submatch = array();
 953                         if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
 954                                 # Media link; trail not supported.
 955                                 $linkRegexp = '/\[\[(.*?)\]\]/';
 956                                 $thelink = $this->makeMediaLink( $submatch[1], "", $text );
 957                         } else {
 958                                 # Other kind of link
 959                                 if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
 960                                         $trail = $submatch[1];
 961                                 } else {
 962                                         $trail = "";
 963                                 }
 964                                 $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
 965                                 if (isset($match[1][0]) && $match[1][0] == ':')
 966                                         $match[1] = substr($match[1], 1);
 967                                 $thelink = $this->makeLink( $match[1], $text, "", $trail );
 968                         }
 969                         $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
 970                 }
 971
 972                 return $comment;
 973         }
 974
 975         /**
 976          * Wrap a comment in standard punctuation and formatting if
 977          * it's non-empty, otherwise return empty string.
 978          *
 979          * @param string $comment
 980          * @param mixed $title Title object (to generate link to section in autocomment) or null
 981          * @param bool $local Whether section links should refer to local page
 982          *
 983          * @return string
 984          */
 985         function commentBlock( $comment, $title = NULL, $local = false ) {
 986                 // '*' used to be the comment inserted by the software way back
 987                 // in antiquity in case none was provided, here for backwards
 988                 // compatability, acc. to brion -ævar
 989                 if( $comment == '' || $comment == '*' ) {
 990                         return '';
 991                 } else {
 992                         $formatted = $this->formatComment( $comment, $title, $local );
 993                         return " <span class=\"comment\">($formatted)</span>";
 994                 }
 995         }
 996
 997         /**
 998          * Wrap and format the given revision's comment block, if the current
 999          * user is allowed to view it.
1000          *
1001          * @param Revision $rev
1002          * @param bool $local Whether section links should refer to local page
1003          * @return string HTML
1004          */
1005         function revComment( Revision $rev, $local = false ) {
1006                 if( $rev->userCan( Revision::DELETED_COMMENT ) ) {
1007                         $block = $this->commentBlock( $rev->getRawComment(), $rev->getTitle(), $local );
1008                 } else {
1009                         $block = " <span class=\"comment\">" .
1010                                 wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1011                 }
1012                 if( $rev->isDeleted( Revision::DELETED_COMMENT ) ) {
1013                         return " <span class=\"history-deleted\">$block</span>";
1014                 }
1015                 return $block;
1016         }
1017
1018         /** @todo document */
1019         function tocIndent() {
1020                 return "\n<ul>";
1021         }
1022
1023         /** @todo document */
1024         function tocUnindent($level) {
1025                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level>0 ? $level : 0 );
1026         }
1027
1028         /**
1029          * parameter level defines if we are on an indentation level
1030          */
1031         function tocLine( $anchor, $tocline, $tocnumber, $level ) {
1032                 return "\n<li class=\"toclevel-$level\"><a href=\"#" .
1033                         $anchor . '"><span class="tocnumber">' .
1034                         $tocnumber . '</span> <span class="toctext">' .
1035                         $tocline . '</span></a>';
1036         }
1037
1038         /** @todo document */
1039         function tocLineEnd() {
1040                 return "</li>\n";
1041         }
1042
1043         /** @todo document */
1044         function tocList($toc) {
1045                 global $wgJsMimeType;
1046                 $title =  wfMsgHtml('toc') ;
1047                 return
1048                    '<table id="toc" class="toc" summary="' . $title .'"><tr><td>'
1049                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
1050                  . $toc
1051                  # no trailing newline, script should not be wrapped in a
1052                  # paragraph
1053                  . "</ul>\n</td></tr></table>"
1054                  . '<script type="' . $wgJsMimeType . '">'
1055                  . ' if (window.showTocToggle) {'
1056                  . ' var tocShowText = "' . wfEscapeJsString( wfMsg('showtoc') ) . '";'
1057                  . ' var tocHideText = "' . wfEscapeJsString( wfMsg('hidetoc') ) . '";'
1058                  . ' showTocToggle();'
1059                  . ' } '
1060                  . "</script>\n";
1061         }
1062
1063         /**
1064          * Used to generate section edit links that point to "other" pages
1065          * (sections that are really part of included pages).
1066          *
1067          * @param $title Title string.
1068          * @param $section Integer: section number.
1069          */
1070         public function editSectionLinkForOther( $title, $section ) {
1071                 $title = Title::newFromText( $title );
1072                 return $this->doEditSectionLink( $title, $section, '', 'EditSectionLinkForOther' );
1073         }
1074
1075         /**
1076          * @param $nt Title object.
1077          * @param $section Integer: section number.
1078          * @param $hint Link String: title, or default if omitted or empty
1079          */
1080         public function editSectionLink( Title $nt, $section, $hint='' ) {
1081                 if( $hint != '' ) {
1082                         $hint = wfMsgHtml( 'editsectionhint', htmlspecialchars( $hint ) );
1083                         $hint = " title=\"$hint\"";
1084                 }
1085                 return $this->doEditSectionLink( $nt, $section, $hint, 'EditSectionLink' );
1086         }
1087
1088         /**
1089          * Implement editSectionLink and editSectionLinkForOther.
1090          *
1091          * @param $nt      Title object
1092          * @param $section Integer, section number
1093          * @param $hint    String, for HTML title attribute
1094          * @param $hook    String, name of hook to run
1095          * @return         String, HTML to use for edit link
1096          */
1097         private function doEditSectionLink( Title $nt, $section, $hint, $hook ) {
1098                 global $wgContLang;
1099                 $editurl = '&section='.$section;
1100                 $url = $this->makeKnownLinkObj(
1101                         $nt,
1102                         wfMsg('editsection'),
1103                         'action=edit'.$editurl,
1104                         '', '', '',  $hint
1105                 );
1106                 $result = null;
1107
1108                 // The two hooks have slightly different interfaces . . .
1109                 if( $hook == 'EditSectionLink' ) {
1110                         wfRunHooks( $hook, array( &$this, $nt, $section, $hint, $url, &$result ) );
1111                 } elseif( $hook == 'EditSectionLinkForOther' ) {
1112                         wfRunHooks( $hook, array( &$this, $nt, $section, $url, &$result ) );
1113                 }
1114
1115                 // For reverse compatibility, add the brackets *after* the hook is run,
1116                 // and even add them to hook-provided text.
1117                 if( is_null( $result ) ) {
1118                         $result = wfMsg( 'editsection-brackets', $url );
1119                 } else {
1120                         $result = wfMsg( 'editsection-brackets', $result );
1121                 }
1122                 return "<span class=\"editsection\">$result</span>";
1123         }
1124
1125         /**
1126          * Create a headline for content
1127          *
1128          * @param int    $level   The level of the headline (1-6)
1129          * @param string $attribs Any attributes for the headline, starting with a space and ending with '>'
1130          *                        This *must* be at least '>' for no attribs
1131          * @param string $anchor  The anchor to give the headline (the bit after the #)
1132          * @param string $text    The text of the header
1133          * @param string $link    HTML to add for the section edit link
1134          *
1135          * @return string HTML headline
1136          */
1137         public function makeHeadline( $level, $attribs, $anchor, $text, $link ) {
1138                 return "<a name=\"$anchor\"></a><h$level$attribs$link <span class=\"mw-headline\">$text</span></h$level>";
1139         }
1140
1141         /**
1142          * Split a link trail, return the "inside" portion and the remainder of the trail
1143          * as a two-element array
1144          *
1145          * @static
1146          */
1147         static function splitTrail( $trail ) {
1148                 static $regex = false;
1149                 if ( $regex === false ) {
1150                         global $wgContLang;
1151                         $regex = $wgContLang->linkTrail();
1152                 }
1153                 $inside = '';
1154                 if ( '' != $trail ) {
1155                         $m = array();
1156                         if ( preg_match( $regex, $trail, $m ) ) {
1157                                 $inside = $m[1];
1158                                 $trail = $m[2];
1159                         }
1160                 }
1161                 return array( $inside, $trail );
1162         }
1163
1164         /**
1165          * Generate a rollback link for a given revision.  Currently it's the
1166          * caller's responsibility to ensure that the revision is the top one. If
1167          * it's not, of course, the user will get an error message.
1168          *
1169          * If the calling page is called with the parameter &bot=1, all rollback
1170          * links also get that parameter. It causes the edit itself and the rollback
1171          * to be marked as "bot" edits. Bot edits are hidden by default from recent
1172          * changes, so this allows sysops to combat a busy vandal without bothering
1173          * other users.
1174          *
1175          * @param Revision $rev
1176          */
1177         function generateRollback( $rev ) {
1178                 return '<span class="mw-rollback-link">['
1179                         . $this->buildRollbackLink( $rev )
1180                         . ']</span>';
1181         }
1182
1183         /**
1184          * Build a raw rollback link, useful for collections of "tool" links
1185          *
1186          * @param Revision $rev
1187          * @return string
1188          */
1189         public function buildRollbackLink( $rev ) {
1190                 global $wgRequest, $wgUser;
1191                 $title = $rev->getTitle();
1192                 $extra  = $wgRequest->getBool( 'bot' ) ? '&bot=1' : '';
1193                 $extra .= '&token=' . urlencode( $wgUser->editToken( array( $title->getPrefixedText(),
1194                         $rev->getUserText() ) ) );
1195                 return $this->makeKnownLinkObj(
1196                         $title,
1197                         wfMsgHtml( 'rollbacklink' ),
1198                         'action=rollback&from=' . urlencode( $rev->getUserText() ) . $extra
1199                 );
1200         }
1201
1202         /**
1203          * Returns HTML for the "templates used on this page" list.
1204          *
1205          * @param array $templates Array of templates from Article::getUsedTemplate
1206          * or similar
1207          * @param bool $preview Whether this is for a preview
1208          * @param bool $section Whether this is for a section edit
1209          * @return string HTML output
1210          */
1211         public function formatTemplates( $templates, $preview = false, $section = false) {
1212                 global $wgUser;
1213                 wfProfileIn( __METHOD__ );
1214
1215                 $sk = $wgUser->getSkin();
1216
1217                 $outText = '';
1218                 if ( count( $templates ) > 0 ) {
1219                         # Do a batch existence check
1220                         $batch = new LinkBatch;
1221                         foreach( $templates as $title ) {
1222                                 $batch->addObj( $title );
1223                         }
1224                         $batch->execute();
1225
1226                         # Construct the HTML
1227                         $outText = '<div class="mw-templatesUsedExplanation">';
1228                         if ( $preview ) {
1229                                 $outText .= wfMsgExt( 'templatesusedpreview', array( 'parse' ) );
1230                         } elseif ( $section ) {
1231                                 $outText .= wfMsgExt( 'templatesusedsection', array( 'parse' ) );
1232                         } else {
1233                                 $outText .= wfMsgExt( 'templatesused', array( 'parse' ) );
1234                         }
1235                         $outText .= '</div><ul>';
1236
1237                         foreach ( $templates as $titleObj ) {
1238                                 $r = $titleObj->getRestrictions( 'edit' );
1239                                 if ( in_array( 'sysop', $r ) ) {
1240                                         $protected = wfMsgExt( 'template-protected', array( 'parseinline' ) );
1241                                 } elseif ( in_array( 'autoconfirmed', $r ) ) {
1242                                         $protected = wfMsgExt( 'template-semiprotected', array( 'parseinline' ) );
1243                                 } else {
1244                                         $protected = '';
1245                                 }
1246                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . ' ' . $protected . '</li>';
1247                         }
1248                         $outText .= '</ul>';
1249                 }
1250                 wfProfileOut( __METHOD__  );
1251                 return $outText;
1252         }
1253
1254         /**
1255          * Format a size in bytes for output, using an appropriate
1256          * unit (B, KB, MB or GB) according to the magnitude in question
1257          *
1258          * @param $size Size to format
1259          * @return string
1260          */
1261         public function formatSize( $size ) {
1262                 global $wgLang;
1263                 // For small sizes no decimal places necessary
1264                 $round = 0;
1265                 if( $size > 1024 ) {
1266                         $size = $size / 1024;
1267                         if( $size > 1024 ) {
1268                                 $size = $size / 1024;
1269                                 // For MB and bigger two decimal places are smarter
1270                                 $round = 2;
1271                                 if( $size > 1024 ) {
1272                                         $size = $size / 1024;
1273                                         $msg = 'size-gigabytes';
1274                                 } else {
1275                                         $msg = 'size-megabytes';
1276                                 }
1277                         } else {
1278                                 $msg = 'size-kilobytes';
1279                         }
1280                 } else {
1281                         $msg = 'size-bytes';
1282                 }
1283                 $size = round( $size, $round );
1284                 return wfMsgHtml( $msg, $wgLang->formatNum( $size ) );
1285         }
1286
1287         /**
1288          * Given the id of an interface element, constructs the appropriate title
1289          * and accesskey attributes from the system messages.  (Note, this is usu-
1290          * ally the id but isn't always, because sometimes the accesskey needs to
1291          * go on a different element than the id, for reverse-compatibility, etc.)
1292          *
1293          * @param string $name Id of the element, minus prefixes.
1294          * @return string title and accesskey attributes, ready to drop in an
1295          *   element (e.g., ' title="This does something [x]" accesskey="x"').
1296          */
1297         public function tooltipAndAccesskey($name) {
1298                 $out = '';
1299
1300                 $tooltip = wfMsg('tooltip-'.$name);
1301                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1302                         // Compatibility: formerly some tooltips had [alt-.] hardcoded
1303                         $tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
1304                         $out .= ' title="'.htmlspecialchars($tooltip);
1305                 }
1306                 $accesskey = wfMsg('accesskey-'.$name);
1307                 if ($accesskey && $accesskey != '-' && !wfEmptyMsg('accesskey-'.$name, $accesskey)) {
1308                         if ($out) $out .= " [$accesskey]\" accesskey=\"$accesskey\"";
1309                         else $out .= " title=\"[$accesskey]\" accesskey=\"$accesskey\"";
1310                 } elseif ($out) {
1311                         $out .= '"';
1312                 }
1313                 return $out;
1314         }
1315
1316         /**
1317          * Given the id of an interface element, constructs the appropriate title
1318          * attribute from the system messages.  (Note, this is usually the id but
1319          * isn't always, because sometimes the accesskey needs to go on a different
1320          * element than the id, for reverse-compatibility, etc.)
1321          *
1322          * @param string $name Id of the element, minus prefixes.
1323          * @return string title attribute, ready to drop in an element
1324          * (e.g., ' title="This does something"').
1325          */
1326         public function tooltip($name) {
1327                 $out = '';
1328
1329                 $tooltip = wfMsg('tooltip-'.$name);
1330                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1331                         $out = ' title="'.htmlspecialchars($tooltip).'"';
1332                 }
1333
1334                 return $out;
1335         }
1336 }
1337
1338
1339