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  * @ingroup Skins
  13  */
  14 class Linker {
  15
  16         /**
  17          * Flags for userToolLinks()
  18          */
  19         const TOOL_LINKS_NOBLOCK = 1;
  20
  21         function __construct() {}
  22
  23         /**
  24          * @deprecated
  25          */
  26         function postParseLinkColour( $s = NULL ) {
  27                 return NULL;
  28         }
  29
  30         /** @todo document */
  31         function getExternalLinkAttributes( $link, $text, $class='' ) {
  32                 $link = htmlspecialchars( $link );
  33
  34                 $r = ($class != '') ? " class=\"$class\"" : " class=\"external\"";
  35
  36                 $r .= " title=\"{$link}\"";
  37                 return $r;
  38         }
  39
  40         function getInterwikiLinkAttributes( $link, $text, $class='' ) {
  41                 global $wgContLang;
  42
  43                 $link = urldecode( $link );
  44                 $link = $wgContLang->checkTitleEncoding( $link );
  45                 $link = preg_replace( '/[\\x00-\\x1f]/', ' ', $link );
  46                 $link = htmlspecialchars( $link );
  47
  48                 $r = ($class != '') ? " class=\"$class\"" : " class=\"external\"";
  49
  50                 $r .= " title=\"{$link}\"";
  51                 return $r;
  52         }
  53
  54         /** @todo document */
  55         function getInternalLinkAttributes( $link, $text, $class='' ) {
  56                 $link = urldecode( $link );
  57                 $link = str_replace( '_', ' ', $link );
  58                 $link = htmlspecialchars( $link );
  59                 $r = ($class != '') ? ' class="' . htmlspecialchars( $class ) . '"' : '';
  60                 $r .= " title=\"{$link}\"";
  61                 return $r;
  62         }
  63
  64         /**
  65          * @param $nt Title object.
  66          * @param $text String: FIXME
  67          * @param $class String: CSS class of the link, default ''.
  68          */
  69         function getInternalLinkAttributesObj( &$nt, $text, $class = '', $titleAttr = false ) {
  70                 $r = ($class != '') ? ' class="' . htmlspecialchars( $class ) . '"' : '';
  71                 if ( $titleAttr === false ) {
  72                         $r .= ' title="' . $nt->getEscapedText() . '"';
  73                 } else {
  74                         $r .= ' title="' . htmlspecialchars( $titleAttr ) . '"';
  75                 }
  76                 return $r;
  77         }
  78
  79         /**
  80          * Return the CSS colour of a known link
  81          *
  82          * @param Title $t
  83          * @param integer $threshold user defined threshold
  84          * @return string CSS class
  85          */
  86         function getLinkColour( $t, $threshold ) {
  87                 $colour = '';
  88                 if ( $t->isRedirect() ) {
  89                         # Page is a redirect
  90                         $colour = 'mw-redirect';
  91                 } elseif ( $threshold > 0 && $t->getLength() < $threshold && MWNamespace::isContent( $t->getNamespace() ) ) {
  92                         # Page is a stub
  93                         $colour = 'stub';
  94                 }
  95                 return $colour;
  96         }
  97
  98         /**
  99          * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
 100          * it if you already have a title object handy. See makeLinkObj for further documentation.
 101          *
 102          * @param $title String: the text of the title
 103          * @param $text  String: link text
 104          * @param $query String: optional query part
 105          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 106          *                      be included in the link text. Other characters will be appended after
 107          *                      the end of the link.
 108          */
 109         function makeLink( $title, $text = '', $query = '', $trail = '' ) {
 110                 wfProfileIn( __METHOD__ );
 111                 $nt = Title::newFromText( $title );
 112                 if ( $nt instanceof Title ) {
 113                         $result = $this->makeLinkObj( $nt, $text, $query, $trail );
 114                 } else {
 115                         wfDebug( 'Invalid title passed to Linker::makeLink(): "'.$title."\"\n" );
 116                         $result = $text == "" ? $title : $text;
 117                 }
 118
 119                 wfProfileOut( __METHOD__ );
 120                 return $result;
 121         }
 122
 123         /**
 124          * This function is a shortcut to makeKnownLinkObj(Title::newFromText($title),...). Do not call
 125          * it if you already have a title object handy. See makeKnownLinkObj for further documentation.
 126          *
 127          * @param $title String: the text of the title
 128          * @param $text  String: link text
 129          * @param $query String: optional query part
 130          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 131          *                      be included in the link text. Other characters will be appended after
 132          *                      the end of the link.
 133          */
 134         function makeKnownLink( $title, $text = '', $query = '', $trail = '', $prefix = '',$aprops = '') {
 135                 $nt = Title::newFromText( $title );
 136                 if ( $nt instanceof Title ) {
 137                         return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix , $aprops );
 138                 } else {
 139                         wfDebug( 'Invalid title passed to Linker::makeKnownLink(): "'.$title."\"\n" );
 140                         return $text == '' ? $title : $text;
 141                 }
 142         }
 143
 144         /**
 145          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
 146          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
 147          *
 148          * @param string $title The text of the title
 149          * @param string $text Link text
 150          * @param string $query Optional query part
 151          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 152          *                      be included in the link text. Other characters will be appended after
 153          *                      the end of the link.
 154          */
 155         function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
 156                 $nt = Title::newFromText( $title );
 157                 if ( $nt instanceof Title ) {
 158                         return $this->makeBrokenLinkObj( $nt, $text, $query, $trail );
 159                 } else {
 160                         wfDebug( 'Invalid title passed to Linker::makeBrokenLink(): "'.$title."\"\n" );
 161                         return $text == '' ? $title : $text;
 162                 }
 163         }
 164
 165         /**
 166          * @deprecated use makeColouredLinkObj
 167          *
 168          * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
 169          * it if you already have a title object handy. See makeStubLinkObj for further documentation.
 170          *
 171          * @param $title String: the text of the title
 172          * @param $text  String: link text
 173          * @param $query String: optional query part
 174          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 175          *                      be included in the link text. Other characters will be appended after
 176          *                      the end of the link.
 177          */
 178         function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
 179                 $nt = Title::newFromText( $title );
 180                 if ( $nt instanceof Title ) {
 181                         return $this->makeStubLinkObj( $nt, $text, $query, $trail );
 182                 } else {
 183                         wfDebug( 'Invalid title passed to Linker::makeStubLink(): "'.$title."\"\n" );
 184                         return $text == '' ? $title : $text;
 185                 }
 186         }
 187
 188         /**
 189          * Make a link for a title which may or may not be in the database. If you need to
 190          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
 191          * call to this will result in a DB query.
 192          *
 193          * @param $nt     Title: the title object to make the link from, e.g. from
 194          *                      Title::newFromText.
 195          * @param $text  String: link text
 196          * @param $query String: optional query part
 197          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 198          *                      be included in the link text. Other characters will be appended after
 199          *                      the end of the link.
 200          * @param $prefix String: optional prefix. As trail, only before instead of after.
 201          */
 202         function makeLinkObj( $nt, $text= '', $query = '', $trail = '', $prefix = '' ) {
 203                 global $wgUser;
 204                 wfProfileIn( __METHOD__ );
 205
 206                 if ( !$nt instanceof Title ) {
 207                         # Fail gracefully
 208                         wfProfileOut( __METHOD__ );
 209                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 210                 }
 211
 212                 if ( $nt->isExternal() ) {
 213                         $u = $nt->getFullURL();
 214                         $link = $nt->getPrefixedURL();
 215                         if ( '' == $text ) { $text = $nt->getPrefixedText(); }
 216                         $style = $this->getInterwikiLinkAttributes( $link, $text, 'extiw' );
 217
 218                         $inside = '';
 219                         if ( '' != $trail ) {
 220                                 $m = array();
 221                                 if ( preg_match( '/^([a-z]+)(.*)$$/sD', $trail, $m ) ) {
 222                                         $inside = $m[1];
 223                                         $trail = $m[2];
 224                                 }
 225                         }
 226                         $t = "<a href=\"{$u}\"{$style}>{$text}{$inside}</a>";
 227
 228                         wfProfileOut( __METHOD__ );
 229                         return $t;
 230                 } elseif ( $nt->isAlwaysKnown() ) {
 231                         # Image links, special page links and self-links with fragments are always known.
 232                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 233                 } else {
 234                         wfProfileIn( __METHOD__.'-immediate' );
 235
 236                         # Handles links to special pages which do not exist in the database:
 237                         if( $nt->getNamespace() == NS_SPECIAL ) {
 238                                 if( SpecialPage::exists( $nt->getDBkey() ) ) {
 239                                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 240                                 } else {
 241                                         $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 242                                 }
 243                                 wfProfileOut( __METHOD__.'-immediate' );
 244                                 wfProfileOut( __METHOD__ );
 245                                 return $retVal;
 246                         }
 247
 248                         # Work out link colour immediately
 249                         $aid = $nt->getArticleID() ;
 250                         if ( 0 == $aid ) {
 251                                 $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 252                         } else {
 253                                 $colour = '';
 254                                 if ( $nt->isContentPage() ) {
 255                                         $threshold = $wgUser->getOption('stubthreshold');
 256                                         $colour = $this->getLinkColour( $nt, $threshold );
 257                                 }
 258                                 $retVal = $this->makeColouredLinkObj( $nt, $colour, $text, $query, $trail, $prefix );
 259                         }
 260                         wfProfileOut( __METHOD__.'-immediate' );
 261                 }
 262                 wfProfileOut( __METHOD__ );
 263                 return $retVal;
 264         }
 265
 266         /**
 267          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
 268          * it doesn't have to do a database query. It's also valid for interwiki titles and special
 269          * pages.
 270          *
 271          * @param $nt Title object of target page
 272          * @param $text   String: text to replace the title
 273          * @param $query  String: link target
 274          * @param $trail  String: text after link
 275          * @param $prefix String: text before link text
 276          * @param $aprops String: extra attributes to the a-element
 277          * @param $style  String: style to apply - if empty, use getInternalLinkAttributesObj instead
 278          * @return the a-element
 279          */
 280         function makeKnownLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = '' ) {
 281                 wfProfileIn( __METHOD__ );
 282
 283                 if ( !$nt instanceof Title ) {
 284                         # Fail gracefully
 285                         wfProfileOut( __METHOD__ );
 286                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 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( __METHOD__ );
 311                 return $r;
 312         }
 313
 314         /**
 315          * Make a red link to the edit page of a given title.
 316          *
 317          * @param $nt Title object of the target page
 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 = '', $prefix = '' ) {
 325                 wfProfileIn( __METHOD__ );
 326
 327                 if ( !$nt instanceof Title ) {
 328                         # Fail gracefully
 329                         wfProfileOut( __METHOD__ );
 330                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 331                 }
 332
 333                 if( $nt->getNamespace() == NS_SPECIAL ) {
 334                         $q = $query;
 335                 } else if ( '' == $query ) {
 336                         $q = 'action=edit&redlink=1';
 337                 } else {
 338                         $q = 'action=edit&redlink=1&'.$query;
 339                 }
 340                 $u = $nt->escapeLocalURL( $q );
 341
 342                 $titleText = $nt->getPrefixedText();
 343                 if ( '' == $text ) {
 344                         $text = htmlspecialchars( $titleText );
 345                 }
 346                 $titleAttr = wfMsg( 'red-link-title', $titleText );
 347                 $style = $this->getInternalLinkAttributesObj( $nt, $text, 'new', $titleAttr );
 348                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 349
 350                 wfRunHooks( 'BrokenLink', array( &$this, $nt, $query, &$u, &$style, &$prefix, &$text, &$inside, &$trail ) );
 351                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 352
 353                 wfProfileOut( __METHOD__ );
 354                 return $s;
 355         }
 356
 357         /**
 358          * @deprecated use makeColouredLinkObj
 359          *
 360          * Make a brown link to a short article.
 361          *
 362          * @param $nt Title object of the target page
 363          * @param $text  String: link text
 364          * @param $query String: optional query part
 365          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
 366          *                      be included in the link text. Other characters will be appended after
 367          *                      the end of the link.
 368          */
 369         function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 370                 return $this->makeColouredLinkObj( $nt, 'stub', $text, $query, $trail, $prefix );
 371         }
 372
 373         /**
 374          * Make a coloured link.
 375          *
 376          * @param $nt Title object of the target page
 377          * @param $colour Integer: colour of the link
 378          * @param $text   String:  link text
 379          * @param $query  String:  optional query part
 380          * @param $trail  String:  optional trail. Alphabetic characters at the start of this string will
 381          *                      be included in the link text. Other characters will be appended after
 382          *                      the end of the link.
 383          */
 384         function makeColouredLinkObj( $nt, $colour, $text = '', $query = '', $trail = '', $prefix = '' ) {
 385
 386                 if($colour != ''){
 387                         $style = $this->getInternalLinkAttributesObj( $nt, $text, $colour );
 388                 } else $style = '';
 389                 return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix, '', $style );
 390         }
 391
 392         /**
 393          * Generate either a normal exists-style link or a stub link, depending
 394          * on the given page size.
 395          *
 396          * @param $size Integer
 397          * @param $nt Title object.
 398          * @param $text String
 399          * @param $query String
 400          * @param $trail String
 401          * @param $prefix String
 402          * @return string HTML of link
 403          */
 404         function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 405                 global $wgUser;
 406                 $threshold = intval( $wgUser->getOption( 'stubthreshold' ) );
 407                 $colour = ( $size < $threshold ) ? 'stub' : '';
 408                 return $this->makeColouredLinkObj( $nt, $colour, $text, $query, $trail, $prefix );
 409         }
 410
 411         /**
 412          * Make appropriate markup for a link to the current article. This is currently rendered
 413          * as the bold link text. The calling sequence is the same as the other make*LinkObj functions,
 414          * despite $query not being used.
 415          */
 416         function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 417                 if ( '' == $text ) {
 418                         $text = htmlspecialchars( $nt->getPrefixedText() );
 419                 }
 420                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 421                 return "<strong class=\"selflink\">{$prefix}{$text}{$inside}</strong>{$trail}";
 422         }
 423
 424         /** @todo document */
 425         function fnamePart( $url ) {
 426                 $basename = strrchr( $url, '/' );
 427                 if ( false === $basename ) {
 428                         $basename = $url;
 429                 } else {
 430                         $basename = substr( $basename, 1 );
 431                 }
 432                 return htmlspecialchars( $basename );
 433         }
 434
 435         /** Obsolete alias */
 436         function makeImage( $url, $alt = '' ) {
 437                 return $this->makeExternalImage( $url, $alt );
 438         }
 439
 440         /** @todo document */
 441         function makeExternalImage( $url, $alt = '' ) {
 442                 if ( '' == $alt ) {
 443                         $alt = $this->fnamePart( $url );
 444                 }
 445                 $s = '<img src="'.$url.'" alt="'.$alt.'" />';
 446                 return $s;
 447         }
 448
 449         /**
 450          * Creates the HTML source for images
 451          * @deprecated use makeImageLink2
 452          *
 453          * @param object $title
 454          * @param string $label label text
 455          * @param string $alt alt text
 456          * @param string $align horizontal alignment: none, left, center, right)
 457          * @param array $handlerParams Parameters to be passed to the media handler
 458          * @param boolean $framed shows image in original size in a frame
 459          * @param boolean $thumb shows image as thumbnail in a frame
 460          * @param string $manualthumb image name for the manual thumbnail
 461          * @param string $valign vertical alignment: baseline, sub, super, top, text-top, middle, bottom, text-bottom
 462          * @param string $time, timestamp of the file, set as false for current
 463          * @return string
 464          */
 465         function makeImageLinkObj( $title, $label, $alt, $align = '', $handlerParams = array(), $framed = false,
 466           $thumb = false, $manualthumb = '', $valign = '', $time = false )
 467         {
 468                 $frameParams = array( 'alt' => $alt, 'caption' => $label );
 469                 if ( $align ) {
 470                         $frameParams['align'] = $align;
 471                 }
 472                 if ( $framed ) {
 473                         $frameParams['framed'] = true;
 474                 }
 475                 if ( $thumb ) {
 476                         $frameParams['thumbnail'] = true;
 477                 }
 478                 if ( $manualthumb ) {
 479                         $frameParams['manualthumb'] = $manualthumb;
 480                 }
 481                 if ( $valign ) {
 482                         $frameParams['valign'] = $valign;
 483                 }
 484                 $file = wfFindFile( $title, $time );
 485                 return $this->makeImageLink2( $title, $file, $frameParams, $handlerParams, $time );
 486         }
 487
 488         /**
 489          * Given parameters derived from [[Image:Foo|options...]], generate the
 490          * HTML that that syntax inserts in the page.
 491          *
 492          * @param Title $title Title object
 493          * @param File $file File object, or false if it doesn't exist
 494          *
 495          * @param array $frameParams Associative array of parameters external to the media handler.
 496          *     Boolean parameters are indicated by presence or absence, the value is arbitrary and
 497          *     will often be false.
 498          *          thumbnail       If present, downscale and frame
 499          *          manualthumb     Image name to use as a thumbnail, instead of automatic scaling
 500          *          framed          Shows image in original size in a frame
 501          *          frameless       Downscale but don't frame
 502          *          upright         If present, tweak default sizes for portrait orientation
 503          *          upright_factor  Fudge factor for "upright" tweak (default 0.75)
 504          *          border          If present, show a border around the image
 505          *          align           Horizontal alignment (left, right, center, none)
 506          *          valign          Vertical alignment (baseline, sub, super, top, text-top, middle,
 507          *                          bottom, text-bottom)
 508          *          alt             Alternate text for image (i.e. alt attribute). Plain text.
 509          *          caption         HTML for image caption.
 510          *
 511          * @param array $handlerParams Associative array of media handler parameters, to be passed
 512          *       to transform(). Typical keys are "width" and "page".
 513          * @param string $time, timestamp of the file, set as false for current
 514          * @param string $query, query params for desc url
 515          * @return string HTML for an image, with links, wrappers, etc.
 516          */
 517         function makeImageLink2( Title $title, $file, $frameParams = array(), $handlerParams = array(), $time = false, $query = "" ) {
 518                 $res = null;
 519                 if( !wfRunHooks( 'ImageBeforeProduceHTML', array( &$this, &$title,
 520                 &$file, &$frameParams, &$handlerParams, &$time, &$res ) ) ) {
 521                         return $res;
 522                 }
 523
 524                 global $wgContLang, $wgUser, $wgThumbLimits, $wgThumbUpright;
 525                 if ( $file && !$file->allowInlineDisplay() ) {
 526                         wfDebug( __METHOD__.': '.$title->getPrefixedDBkey()." does not allow inline display\n" );
 527                         return $this->makeKnownLinkObj( $title );
 528                 }
 529
 530                 // Shortcuts
 531                 $fp =& $frameParams;
 532                 $hp =& $handlerParams;
 533
 534                 // Clean up parameters
 535                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 536                 if ( !isset( $fp['align'] ) ) $fp['align'] = '';
 537                 if ( !isset( $fp['alt'] ) ) $fp['alt'] = '';
 538
 539                 $prefix = $postfix = '';
 540
 541                 if ( 'center' == $fp['align'] )
 542                 {
 543                         $prefix  = '<div class="center">';
 544                         $postfix = '</div>';
 545                         $fp['align']   = 'none';
 546                 }
 547                 if ( $file && !isset( $hp['width'] ) ) {
 548                         $hp['width'] = $file->getWidth( $page );
 549
 550                         if( isset( $fp['thumbnail'] ) || isset( $fp['framed'] ) || isset( $fp['frameless'] ) || !$hp['width'] ) {
 551                                 $wopt = $wgUser->getOption( 'thumbsize' );
 552
 553                                 if( !isset( $wgThumbLimits[$wopt] ) ) {
 554                                          $wopt = User::getDefaultOption( 'thumbsize' );
 555                                 }
 556
 557                                 // Reduce width for upright images when parameter 'upright' is used
 558                                 if ( isset( $fp['upright'] ) && $fp['upright'] == 0 ) {
 559                                         $fp['upright'] = $wgThumbUpright;
 560                                 }
 561                                 // Use width which is smaller: real image width or user preference width
 562                                 // 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
 563                                 $prefWidth = isset( $fp['upright'] ) ?
 564                                         round( $wgThumbLimits[$wopt] * $fp['upright'], -1 ) :
 565                                         $wgThumbLimits[$wopt];
 566                                 if ( $hp['width'] <= 0 || $prefWidth < $hp['width'] ) {
 567                                         $hp['width'] = $prefWidth;
 568                                 }
 569                         }
 570                 }
 571
 572                 if ( isset( $fp['thumbnail'] ) || isset( $fp['manualthumb'] ) || isset( $fp['framed'] ) ) {
 573
 574                         # Create a thumbnail. Alignment depends on language
 575                         # writing direction, # right aligned for left-to-right-
 576                         # languages ("Western languages"), left-aligned
 577                         # for right-to-left-languages ("Semitic languages")
 578                         #
 579                         # If  thumbnail width has not been provided, it is set
 580                         # to the default user option as specified in Language*.php
 581                         if ( $fp['align'] == '' ) {
 582                                 $fp['align'] = $wgContLang->isRTL() ? 'left' : 'right';
 583                         }
 584                         return $prefix.$this->makeThumbLink2( $title, $file, $fp, $hp, $time, $query ).$postfix;
 585                 }
 586
 587                 if ( $file && isset( $fp['frameless'] ) ) {
 588                         $srcWidth = $file->getWidth( $page );
 589                         # For "frameless" option: do not present an image bigger than the source (for bitmap-style images)
 590                         # This is the same behaviour as the "thumb" option does it already.
 591                         if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 592                                 $hp['width'] = $srcWidth;
 593                         }
 594                 }
 595
 596                 if ( $file && $hp['width'] ) {
 597                         # Create a resized image, without the additional thumbnail features
 598                         $thumb = $file->transform( $hp );
 599                 } else {
 600                         $thumb = false;
 601                 }
 602
 603                 if ( !$thumb ) {
 604                         $s = $this->makeBrokenImageLinkObj( $title, '', '', '', '', $time==true );
 605                 } else {
 606                         $s = $thumb->toHtml( array(
 607                                 'desc-link' => true,
 608                                 'desc-query' => $query,
 609                                 'alt' => $fp['alt'],
 610                                 'valign' => isset( $fp['valign'] ) ? $fp['valign'] : false ,
 611                                 'img-class' => isset( $fp['border'] ) ? 'thumbborder' : false ) );
 612                 }
 613                 if ( '' != $fp['align'] ) {
 614                         $s = "<div class=\"float{$fp['align']}\"><span>{$s}</span></div>";
 615                 }
 616                 return str_replace("\n", ' ',$prefix.$s.$postfix);
 617         }
 618
 619         /**
 620          * Make HTML for a thumbnail including image, border and caption
 621          * @param Title $title
 622          * @param File $file File object or false if it doesn't exist
 623          */
 624         function makeThumbLinkObj( Title $title, $file, $label = '', $alt, $align = 'right', $params = array(), $framed=false , $manualthumb = "" ) {
 625                 $frameParams = array(
 626                         'alt' => $alt,
 627                         'caption' => $label,
 628                         'align' => $align
 629                 );
 630                 if ( $framed ) $frameParams['framed'] = true;
 631                 if ( $manualthumb ) $frameParams['manualthumb'] = $manualthumb;
 632                 return $this->makeThumbLink2( $title, $file, $frameParams, $params );
 633         }
 634
 635         function makeThumbLink2( Title $title, $file, $frameParams = array(), $handlerParams = array(), $time = false, $query = "" ) {
 636                 global $wgStylePath, $wgContLang;
 637                 $exists = $file && $file->exists();
 638
 639                 # Shortcuts
 640                 $fp =& $frameParams;
 641                 $hp =& $handlerParams;
 642
 643                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 644                 if ( !isset( $fp['align'] ) ) $fp['align'] = 'right';
 645                 if ( !isset( $fp['alt'] ) ) $fp['alt'] = '';
 646                 if ( !isset( $fp['caption'] ) ) $fp['caption'] = '';
 647
 648                 if ( empty( $hp['width'] ) ) {
 649                         // Reduce width for upright images when parameter 'upright' is used
 650                         $hp['width'] = isset( $fp['upright'] ) ? 130 : 180;
 651                 }
 652                 $thumb = false;
 653
 654                 if ( !$exists ) {
 655                         $outerWidth = $hp['width'] + 2;
 656                 } else {
 657                         if ( isset( $fp['manualthumb'] ) ) {
 658                                 # Use manually specified thumbnail
 659                                 $manual_title = Title::makeTitleSafe( NS_IMAGE, $fp['manualthumb'] );
 660                                 if( $manual_title ) {
 661                                         $manual_img = wfFindFile( $manual_title );
 662                                         if ( $manual_img ) {
 663                                                 $thumb = $manual_img->getUnscaledThumb();
 664                                         } else {
 665                                                 $exists = false;
 666                                         }
 667                                 }
 668                         } elseif ( isset( $fp['framed'] ) ) {
 669                                 // Use image dimensions, don't scale
 670                                 $thumb = $file->getUnscaledThumb( $page );
 671                         } else {
 672                                 # Do not present an image bigger than the source, for bitmap-style images
 673                                 # This is a hack to maintain compatibility with arbitrary pre-1.10 behaviour
 674                                 $srcWidth = $file->getWidth( $page );
 675                                 if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 676                                         $hp['width'] = $srcWidth;
 677                                 }
 678                                 $thumb = $file->transform( $hp );
 679                         }
 680
 681                         if ( $thumb ) {
 682                                 $outerWidth = $thumb->getWidth() + 2;
 683                         } else {
 684                                 $outerWidth = $hp['width'] + 2;
 685                         }
 686                 }
 687
 688                 if( $page ) {
 689                         $query = $query ? '&page=' . urlencode( $page ) : 'page=' . urlencode( $page );
 690                 }
 691                 $url = $title->getLocalURL( $query );
 692
 693                 $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
 694
 695                 $s = "<div class=\"thumb t{$fp['align']}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
 696                 if( !$exists ) {
 697                         $s .= $this->makeBrokenImageLinkObj( $title, '', '', '', '', $time==true );
 698                         $zoomicon = '';
 699                 } elseif ( !$thumb ) {
 700                         $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
 701                         $zoomicon = '';
 702                 } else {
 703                         $s .= $thumb->toHtml( array(
 704                                 'alt' => $fp['alt'],
 705                                 'img-class' => 'thumbimage',
 706                                 'desc-link' => true,
 707                                 'desc-query' => $query ) );
 708                         if ( isset( $fp['framed'] ) ) {
 709                                 $zoomicon="";
 710                         } else {
 711                                 $zoomicon =  '<div class="magnify">'.
 712                                         '<a href="'.$url.'" class="internal" title="'.$more.'">'.
 713                                         '<img src="'.$wgStylePath.'/common/images/magnify-clip.png" ' .
 714                                         'width="15" height="11" alt="" /></a></div>';
 715                         }
 716                 }
 717                 $s .= '  <div class="thumbcaption">'.$zoomicon.$fp['caption']."</div></div></div>";
 718                 return str_replace("\n", ' ', $s);
 719         }
 720
 721         /**
 722          * Make a "broken" link to an image
 723          *
 724          * @param Title $title Image title
 725          * @param string $text Link label
 726          * @param string $query Query string
 727          * @param string $trail Link trail
 728          * @param string $prefix Link prefix
 729          * @param bool $time, a file of a certain timestamp was requested
 730          * @return string
 731          */
 732         public function makeBrokenImageLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '', $time = false ) {
 733                 global $wgEnableUploads;
 734                 if( $title instanceof Title ) {
 735                         wfProfileIn( __METHOD__ );
 736                         $currentExists = $time ? ( wfFindFile( $title ) != false ) : false;
 737                         if( $wgEnableUploads && !$currentExists ) {
 738                                 $upload = SpecialPage::getTitleFor( 'Upload' );
 739                                 if( $text == '' )
 740                                         $text = htmlspecialchars( $title->getPrefixedText() );
 741                                 $redir = RepoGroup::singleton()->getLocalRepo()->checkRedirect( $title );
 742                                 if( $redir ) {
 743                                         return $this->makeKnownLinkObj( $title, $text, $query, $trail, $prefix );
 744                                 }
 745                                 $q = 'wpDestFile=' . $title->getPartialUrl();
 746                                 if( $query != '' )
 747                                         $q .= '&' . $query;
 748                                 list( $inside, $trail ) = self::splitTrail( $trail );
 749                                 $style = $this->getInternalLinkAttributesObj( $title, $text, 'new' );
 750                                 wfProfileOut( __METHOD__ );
 751                                 return '<a href="' . $upload->escapeLocalUrl( $q ) . '"'
 752                                         . $style . '>' . $prefix . $text . $inside . '</a>' . $trail;
 753                         } else {
 754                                 wfProfileOut( __METHOD__ );
 755                                 return $this->makeKnownLinkObj( $title, $text, $query, $trail, $prefix );
 756                         }
 757                 } else {
 758                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 759                 }
 760         }
 761
 762         /** @deprecated use Linker::makeMediaLinkObj() */
 763         function makeMediaLink( $name, $unused = '', $text = '', $time = false ) {
 764                 $nt = Title::makeTitleSafe( NS_IMAGE, $name );
 765                 return $this->makeMediaLinkObj( $nt, $text, $time );
 766         }
 767
 768         /**
 769          * Create a direct link to a given uploaded file.
 770          *
 771          * @param $title Title object.
 772          * @param $text String: pre-sanitized HTML
 773          * @param $time string: time image was created
 774          * @return string HTML
 775          *
 776          * @public
 777          * @todo Handle invalid or missing images better.
 778          */
 779         function makeMediaLinkObj( $title, $text = '', $time = false ) {
 780                 if( is_null( $title ) ) {
 781                         ### HOTFIX. Instead of breaking, return empty string.
 782                         return $text;
 783                 } else {
 784                         $img  = wfFindFile( $title, $time );
 785                         if( $img ) {
 786                                 $url  = $img->getURL();
 787                                 $class = 'internal';
 788                         } else {
 789                                 $upload = SpecialPage::getTitleFor( 'Upload' );
 790                                 $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $title->getDBkey() ) );
 791                                 $class = 'new';
 792                         }
 793                         $alt = htmlspecialchars( $title->getText() );
 794                         if( $text == '' ) {
 795                                 $text = $alt;
 796                         }
 797                         $u = htmlspecialchars( $url );
 798                         return "<a href=\"{$u}\" class=\"$class\" title=\"{$alt}\">{$text}</a>";
 799                 }
 800         }
 801
 802         /** @todo document */
 803         function specialLink( $name, $key = '' ) {
 804                 global $wgContLang;
 805
 806                 if ( '' == $key ) { $key = strtolower( $name ); }
 807                 $pn = $wgContLang->ucfirst( $name );
 808                 return $this->makeKnownLink( $wgContLang->specialPage( $pn ),
 809                   wfMsg( $key ) );
 810         }
 811
 812         /** @todo document */
 813         function makeExternalLink( $url, $text, $escape = true, $linktype = '', $ns = null ) {
 814                 $style = $this->getExternalLinkAttributes( $url, $text, 'external ' . $linktype );
 815                 global $wgNoFollowLinks, $wgNoFollowNsExceptions;
 816                 if( $wgNoFollowLinks && !(isset($ns) && in_array($ns, $wgNoFollowNsExceptions)) ) {
 817                         $style .= ' rel="nofollow"';
 818                 }
 819                 $url = htmlspecialchars( $url );
 820                 if( $escape ) {
 821                         $text = htmlspecialchars( $text );
 822                 }
 823                 $link = '';
 824                 $success = wfRunHooks('LinkerMakeExternalLink', array( &$url, &$text, &link ) );
 825                 if(!$success) {
 826                         wfDebug("Hook LinkerMakeExternalLink changed the output of link with url {$url} and text {$text} to {$link}", true);
 827                         return $link;
 828                 }
 829                 return '<a href="'.$url.'"'.$style.'>'.$text.'</a>';
 830         }
 831
 832         /**
 833          * Make user link (or user contributions for unregistered users)
 834          * @param $userId   Integer: user id in database.
 835          * @param $userText String: user name in database
 836          * @return string HTML fragment
 837          * @private
 838          */
 839         function userLink( $userId, $userText ) {
 840                 $encName = htmlspecialchars( $userText );
 841                 if( $userId == 0 ) {
 842                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 843                         return $this->makeKnownLinkObj( $contribsPage,
 844                                 $encName);
 845                 } else {
 846                         $userPage = Title::makeTitle( NS_USER, $userText );
 847                         return $this->makeLinkObj( $userPage, $encName );
 848                 }
 849         }
 850
 851         /**
 852          * Generate standard user tool links (talk, contributions, block link, etc.)
 853          *
 854          * @param int $userId User identifier
 855          * @param string $userText User name or IP address
 856          * @param bool $redContribsWhenNoEdits Should the contributions link be red if the user has no edits?
 857          * @param int $flags Customisation flags (e.g. self::TOOL_LINKS_NOBLOCK)
 858          * @param int $edits, user edit count (optional, for performance)
 859          * @return string
 860          */
 861         public function userToolLinks( $userId, $userText, $redContribsWhenNoEdits = false, $flags = 0, $edits=null ) {
 862                 global $wgUser, $wgDisableAnonTalk, $wgSysopUserBans;
 863                 $talkable = !( $wgDisableAnonTalk && 0 == $userId );
 864                 $blockable = ( $wgSysopUserBans || 0 == $userId ) && !$flags & self::TOOL_LINKS_NOBLOCK;
 865
 866                 $items = array();
 867                 if( $talkable ) {
 868                         $items[] = $this->userTalkLink( $userId, $userText );
 869                 }
 870                 if( $userId ) {
 871                         // check if the user has an edit
 872                         if( $redContribsWhenNoEdits ) {
 873                                 $count = !is_null($edits) ? $edits : User::edits( $userId );
 874                                 $style = ($count == 0) ? " class='new'" : '';
 875                         } else {
 876                                 $style = '';
 877                         }
 878                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 879
 880                         $items[] = $this->makeKnownLinkObj( $contribsPage, wfMsgHtml( 'contribslink' ), '', '', '', '', $style );
 881                 }
 882                 if( $blockable && $wgUser->isAllowed( 'block' ) ) {
 883                         $items[] = $this->blockLink( $userId, $userText );
 884                 }
 885
 886                 if( $items ) {
 887                         return ' (' . implode( ' | ', $items ) . ')';
 888                 } else {
 889                         return '';
 890                 }
 891         }
 892
 893         /**
 894          * Alias for userToolLinks( $userId, $userText, true );
 895          * @param int $userId User identifier
 896          * @param string $userText User name or IP address
 897          * @param int $edits, user edit count (optional, for performance)
 898          */
 899         public function userToolLinksRedContribs( $userId, $userText, $edits=null ) {
 900                 return $this->userToolLinks( $userId, $userText, true, 0, $edits );
 901         }
 902
 903
 904         /**
 905          * @param $userId Integer: user id in database.
 906          * @param $userText String: user name in database.
 907          * @return string HTML fragment with user talk link
 908          * @private
 909          */
 910         function userTalkLink( $userId, $userText ) {
 911                 $userTalkPage = Title::makeTitle( NS_USER_TALK, $userText );
 912                 $userTalkLink = $this->makeLinkObj( $userTalkPage, wfMsgHtml( 'talkpagelinktext' ) );
 913                 return $userTalkLink;
 914         }
 915
 916         /**
 917          * @param $userId Integer: userid
 918          * @param $userText String: user name in database.
 919          * @return string HTML fragment with block link
 920          * @private
 921          */
 922         function blockLink( $userId, $userText ) {
 923                 $blockPage = SpecialPage::getTitleFor( 'Blockip', $userText );
 924                 $blockLink = $this->makeKnownLinkObj( $blockPage,
 925                         wfMsgHtml( 'blocklink' ) );
 926                 return $blockLink;
 927         }
 928
 929         /**
 930          * Generate a user link if the current user is allowed to view it
 931          * @param $rev Revision object.
 932          * @param $isPublic, bool, show only if all users can see it
 933          * @return string HTML
 934          */
 935         function revUserLink( $rev, $isPublic = false ) {
 936                 if( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
 937                         $link = wfMsgHtml( 'rev-deleted-user' );
 938                 } else if( $rev->userCan( Revision::DELETED_USER ) ) {
 939                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() );
 940                 } else {
 941                         $link = wfMsgHtml( 'rev-deleted-user' );
 942                 }
 943                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 944                         return '<span class="history-deleted">' . $link . '</span>';
 945                 }
 946                 return $link;
 947         }
 948
 949         /**
 950          * Generate a user tool link cluster if the current user is allowed to view it
 951          * @param $rev Revision object.
 952          * @param $isPublic, bool, show only if all users can see it
 953          * @return string HTML
 954          */
 955         function revUserTools( $rev, $isPublic = false ) {
 956                 if( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
 957                         $link = wfMsgHtml( 'rev-deleted-user' );
 958                 } else if( $rev->userCan( Revision::DELETED_USER ) ) {
 959                         $link = $this->userLink( $rev->getRawUser(), $rev->getRawUserText() ) .
 960                         ' ' . $this->userToolLinks( $rev->getRawUser(), $rev->getRawUserText() );
 961                 } else {
 962                         $link = wfMsgHtml( 'rev-deleted-user' );
 963                 }
 964                 if( $rev->isDeleted( Revision::DELETED_USER ) ) {
 965                         return ' <span class="history-deleted">' . $link . '</span>';
 966                 }
 967                 return $link;
 968         }
 969
 970         /**
 971          * This function is called by all recent changes variants, by the page history,
 972          * and by the user contributions list. It is responsible for formatting edit
 973          * comments. It escapes any HTML in the comment, but adds some CSS to format
 974          * auto-generated comments (from section editing) and formats [[wikilinks]].
 975          *
 976          * @author Erik Moeller <moeller@scireview.de>
 977          *
 978          * Note: there's not always a title to pass to this function.
 979          * Since you can't set a default parameter for a reference, I've turned it
 980          * temporarily to a value pass. Should be adjusted further. --brion
 981          *
 982          * @param string $comment
 983          * @param mixed $title Title object (to generate link to the section in autocomment) or null
 984          * @param bool $local Whether section links should refer to local page
 985          */
 986         function formatComment($comment, $title = NULL, $local = false) {
 987                 wfProfileIn( __METHOD__ );
 988
 989                 # Sanitize text a bit:
 990                 $comment = str_replace( "\n", " ", $comment );
 991                 $comment = htmlspecialchars( $comment );
 992
 993                 # Render autocomments and make links:
 994                 $comment = $this->formatAutoComments( $comment, $title, $local );
 995                 $comment = $this->formatLinksInComment( $comment );
 996
 997                 wfProfileOut( __METHOD__ );
 998                 return $comment;
 999         }
1000
1001         /**
1002          * The pattern for autogen comments is / * foo * /, which makes for
1003          * some nasty regex.
1004          * We look for all comments, match any text before and after the comment,
1005          * add a separator where needed and format the comment itself with CSS
1006          * Called by Linker::formatComment.
1007          *
1008          * @param string $comment Comment text
1009          * @param object $title An optional title object used to links to sections
1010          * @return string $comment formatted comment
1011          *
1012          * @todo Document the $local parameter.
1013          */
1014         private function formatAutocomments( $comment, $title = NULL, $local = false ) {
1015                 $match = array();
1016                 while (preg_match('!(.*)/\*\s*(.*?)\s*\*/(.*)!', $comment,$match)) {
1017                         $pre=$match[1];
1018                         $auto=$match[2];
1019                         $post=$match[3];
1020                         $link='';
1021                         if( $title ) {
1022                                 $section = $auto;
1023
1024                                 # Generate a valid anchor name from the section title.
1025                                 # Hackish, but should generally work - we strip wiki
1026                                 # syntax, including the magic [[: that is used to
1027                                 # "link rather than show" in case of images and
1028                                 # interlanguage links.
1029                                 $section = str_replace( '[[:', '', $section );
1030                                 $section = str_replace( '[[', '', $section );
1031                                 $section = str_replace( ']]', '', $section );
1032                                 if ( $local ) {
1033                                         $sectionTitle = Title::newFromText( '#' . $section);
1034                                 } else {
1035                                         $sectionTitle = wfClone( $title );
1036                                         $sectionTitle->mFragment = $section;
1037                                 }
1038                                 $link = $this->makeKnownLinkObj( $sectionTitle, wfMsgForContent( 'sectionlink' ) );
1039                         }
1040                         $auto = $link . $auto;
1041                         if( $pre ) {
1042                                 # written summary $presep autocomment (summary /* section */)
1043                                 $auto = wfMsgExt( 'autocomment-prefix', array( 'escapenoentities', 'content' ) ) . $auto;
1044                         }
1045                         if( $post ) {
1046                                 # autocomment $postsep written summary (/* section */ summary)
1047                                 $auto .= wfMsgExt( 'colon-separator', array( 'escapenoentities', 'content' ) );
1048                         }
1049                         $auto = '<span class="autocomment">' . $auto . '</span>';
1050                         $comment = $pre . $auto . $post;
1051                 }
1052
1053                 return $comment;
1054         }
1055
1056         /**
1057          * Formats wiki links and media links in text; all other wiki formatting
1058          * is ignored
1059          *
1060          * @fixme doesn't handle sub-links as in image thumb texts like the main parser
1061          * @param string $comment Text to format links in
1062          * @return string
1063          */
1064         public function formatLinksInComment( $comment ) {
1065                 return preg_replace_callback(
1066                         '/\[\[:?(.*?)(\|(.*?))*\]\]([^[]*)/',
1067                         array( $this, 'formatLinksInCommentCallback' ),
1068                         $comment );
1069         }
1070
1071         protected function formatLinksInCommentCallback( $match ) {
1072                 global $wgContLang;
1073
1074                 $medians = '(?:' . preg_quote( MWNamespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
1075                 $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
1076
1077                 $comment = $match[0];
1078
1079                 # fix up urlencoded title texts (copied from Parser::replaceInternalLinks)
1080                 if( strpos( $match[1], '%' ) !== false ) {
1081                         $match[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($match[1]) );
1082                 }
1083
1084                 # Handle link renaming [[foo|text]] will show link as "text"
1085                 if( "" != $match[3] ) {
1086                         $text = $match[3];
1087                 } else {
1088                         $text = $match[1];
1089                 }
1090                 $submatch = array();
1091                 if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
1092                         # Media link; trail not supported.
1093                         $linkRegexp = '/\[\[(.*?)\]\]/';
1094                         $thelink = $this->makeMediaLink( $submatch[1], "", $text );
1095                 } else {
1096                         # Other kind of link
1097                         if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
1098                                 $trail = $submatch[1];
1099                         } else {
1100                                 $trail = "";
1101                         }
1102                         $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
1103                         if (isset($match[1][0]) && $match[1][0] == ':')
1104                                 $match[1] = substr($match[1], 1);
1105                         $thelink = $this->makeLink( $match[1], $text, "", $trail );
1106                 }
1107                 $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
1108
1109                 return $comment;
1110         }
1111
1112         /**
1113          * Wrap a comment in standard punctuation and formatting if
1114          * it's non-empty, otherwise return empty string.
1115          *
1116          * @param string $comment
1117          * @param mixed $title Title object (to generate link to section in autocomment) or null
1118          * @param bool $local Whether section links should refer to local page
1119          *
1120          * @return string
1121          */
1122         function commentBlock( $comment, $title = NULL, $local = false ) {
1123                 // '*' used to be the comment inserted by the software way back
1124                 // in antiquity in case none was provided, here for backwards
1125                 // compatability, acc. to brion -ævar
1126                 if( $comment == '' || $comment == '*' ) {
1127                         return '';
1128                 } else {
1129                         $formatted = $this->formatComment( $comment, $title, $local );
1130                         return " <span class=\"comment\">($formatted)</span>";
1131                 }
1132         }
1133
1134         /**
1135          * Wrap and format the given revision's comment block, if the current
1136          * user is allowed to view it.
1137          *
1138          * @param Revision $rev
1139          * @param bool $local Whether section links should refer to local page
1140          * @param $isPublic, show only if all users can see it
1141          * @return string HTML
1142          */
1143         function revComment( Revision $rev, $local = false, $isPublic = false ) {
1144                 if( $rev->isDeleted( Revision::DELETED_COMMENT ) && $isPublic ) {
1145                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1146                 } else if( $rev->userCan( Revision::DELETED_COMMENT ) ) {
1147                         $block = $this->commentBlock( $rev->getRawComment(), $rev->getTitle(), $local );
1148                 } else {
1149                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1150                 }
1151                 if( $rev->isDeleted( Revision::DELETED_COMMENT ) ) {
1152                         return " <span class=\"history-deleted\">$block</span>";
1153                 }
1154                 return $block;
1155         }
1156
1157         /** @todo document */
1158         function tocIndent() {
1159                 return "\n<ul>";
1160         }
1161
1162         /** @todo document */
1163         function tocUnindent($level) {
1164                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level>0 ? $level : 0 );
1165         }
1166
1167         /**
1168          * parameter level defines if we are on an indentation level
1169          */
1170         function tocLine( $anchor, $tocline, $tocnumber, $level ) {
1171                 return "\n<li class=\"toclevel-$level\"><a href=\"#" .
1172                         $anchor . '"><span class="tocnumber">' .
1173                         $tocnumber . '</span> <span class="toctext">' .
1174                         $tocline . '</span></a>';
1175         }
1176
1177         /** @todo document */
1178         function tocLineEnd() {
1179                 return "</li>\n";
1180         }
1181
1182         /** @todo document */
1183         function tocList($toc) {
1184                 global $wgJsMimeType;
1185                 $title = wfMsgHtml('toc') ;
1186                 return
1187                    '<table id="toc" class="toc" summary="' . $title .'"><tr><td>'
1188                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
1189                  . $toc
1190                  # no trailing newline, script should not be wrapped in a
1191                  # paragraph
1192                  . "</ul>\n</td></tr></table>"
1193                  . '<script type="' . $wgJsMimeType . '">'
1194                  . ' if (window.showTocToggle) {'
1195                  . ' var tocShowText = "' . wfEscapeJsString( wfMsg('showtoc') ) . '";'
1196                  . ' var tocHideText = "' . wfEscapeJsString( wfMsg('hidetoc') ) . '";'
1197                  . ' showTocToggle();'
1198                  . ' } '
1199                  . "</script>\n";
1200         }
1201
1202         /**
1203          * Used to generate section edit links that point to "other" pages
1204          * (sections that are really part of included pages).
1205          *
1206          * @param $title Title string.
1207          * @param $section Integer: section number.
1208          */
1209         public function editSectionLinkForOther( $title, $section ) {
1210                 $title = Title::newFromText( $title );
1211                 return $this->doEditSectionLink( $title, $section, '', 'EditSectionLinkForOther' );
1212         }
1213
1214         /**
1215          * @param $nt Title object.
1216          * @param $section Integer: section number.
1217          * @param $hint Link String: title, or default if omitted or empty
1218          */
1219         public function editSectionLink( Title $nt, $section, $hint='' ) {
1220                 if( $hint != '' ) {
1221                         $hint = wfMsgHtml( 'editsectionhint', htmlspecialchars( $hint ) );
1222                         $hint = " title=\"$hint\"";
1223                 }
1224                 return $this->doEditSectionLink( $nt, $section, $hint, 'EditSectionLink' );
1225         }
1226
1227         /**
1228          * Implement editSectionLink and editSectionLinkForOther.
1229          *
1230          * @param $nt      Title object
1231          * @param $section Integer, section number
1232          * @param $hint    String, for HTML title attribute
1233          * @param $hook    String, name of hook to run
1234          * @return         String, HTML to use for edit link
1235          */
1236         protected function doEditSectionLink( Title $nt, $section, $hint, $hook ) {
1237                 global $wgContLang;
1238                 $editurl = '&section='.$section;
1239                 $url = $this->makeKnownLinkObj(
1240                         $nt,
1241                         wfMsg('editsection'),
1242                         'action=edit'.$editurl,
1243                         '', '', '',  $hint
1244                 );
1245                 $result = null;
1246
1247                 // The two hooks have slightly different interfaces . . .
1248                 if( $hook == 'EditSectionLink' ) {
1249                         wfRunHooks( 'EditSectionLink', array( &$this, $nt, $section, $hint, $url, &$result ) );
1250                 } elseif( $hook == 'EditSectionLinkForOther' ) {
1251                         wfRunHooks( 'EditSectionLinkForOther', array( &$this, $nt, $section, $url, &$result ) );
1252                 }
1253
1254                 // For reverse compatibility, add the brackets *after* the hook is run,
1255                 // and even add them to hook-provided text.
1256                 if( is_null( $result ) ) {
1257                         $result = wfMsg( 'editsection-brackets', $url );
1258                 } else {
1259                         $result = wfMsg( 'editsection-brackets', $result );
1260                 }
1261                 return "<span class=\"editsection\">$result</span>";
1262         }
1263
1264         /**
1265          * Create a headline for content
1266          *
1267          * @param int    $level   The level of the headline (1-6)
1268          * @param string $attribs Any attributes for the headline, starting with a space and ending with '>'
1269          *                        This *must* be at least '>' for no attribs
1270          * @param string $anchor  The anchor to give the headline (the bit after the #)
1271          * @param string $text    The text of the header
1272          * @param string $link    HTML to add for the section edit link
1273          *
1274          * @return string HTML headline
1275          */
1276         public function makeHeadline( $level, $attribs, $anchor, $text, $link ) {
1277                 return "<a name=\"$anchor\"></a><h$level$attribs$link <span class=\"mw-headline\">$text</span></h$level>";
1278         }
1279
1280         /**
1281          * Split a link trail, return the "inside" portion and the remainder of the trail
1282          * as a two-element array
1283          *
1284          * @static
1285          */
1286         static function splitTrail( $trail ) {
1287                 static $regex = false;
1288                 if ( $regex === false ) {
1289                         global $wgContLang;
1290                         $regex = $wgContLang->linkTrail();
1291                 }
1292                 $inside = '';
1293                 if ( '' != $trail ) {
1294                         $m = array();
1295                         if ( preg_match( $regex, $trail, $m ) ) {
1296                                 $inside = $m[1];
1297                                 $trail = $m[2];
1298                         }
1299                 }
1300                 return array( $inside, $trail );
1301         }
1302
1303         /**
1304          * Generate a rollback link for a given revision.  Currently it's the
1305          * caller's responsibility to ensure that the revision is the top one. If
1306          * it's not, of course, the user will get an error message.
1307          *
1308          * If the calling page is called with the parameter &bot=1, all rollback
1309          * links also get that parameter. It causes the edit itself and the rollback
1310          * to be marked as "bot" edits. Bot edits are hidden by default from recent
1311          * changes, so this allows sysops to combat a busy vandal without bothering
1312          * other users.
1313          *
1314          * @param Revision $rev
1315          */
1316         function generateRollback( $rev ) {
1317                 return '<span class="mw-rollback-link">['
1318                         . $this->buildRollbackLink( $rev )
1319                         . ']</span>';
1320         }
1321
1322         /**
1323          * Build a raw rollback link, useful for collections of "tool" links
1324          *
1325          * @param Revision $rev
1326          * @return string
1327          */
1328         public function buildRollbackLink( $rev ) {
1329                 global $wgRequest, $wgUser;
1330                 $title = $rev->getTitle();
1331                 $extra  = $wgRequest->getBool( 'bot' ) ? '&bot=1' : '';
1332                 $extra .= '&token=' . urlencode( $wgUser->editToken( array( $title->getPrefixedText(),
1333                         $rev->getUserText() ) ) );
1334                 return $this->makeKnownLinkObj(
1335                         $title,
1336                         wfMsgHtml( 'rollbacklink' ),
1337                         'action=rollback&from=' . urlencode( $rev->getUserText() ) . $extra
1338                 );
1339         }
1340
1341         /**
1342          * Returns HTML for the "templates used on this page" list.
1343          *
1344          * @param array $templates Array of templates from Article::getUsedTemplate
1345          * or similar
1346          * @param bool $preview Whether this is for a preview
1347          * @param bool $section Whether this is for a section edit
1348          * @return string HTML output
1349          */
1350         public function formatTemplates( $templates, $preview = false, $section = false) {
1351                 global $wgUser;
1352                 wfProfileIn( __METHOD__ );
1353
1354                 $sk = $wgUser->getSkin();
1355
1356                 $outText = '';
1357                 if ( count( $templates ) > 0 ) {
1358                         # Do a batch existence check
1359                         $batch = new LinkBatch;
1360                         foreach( $templates as $title ) {
1361                                 $batch->addObj( $title );
1362                         }
1363                         $batch->execute();
1364
1365                         # Construct the HTML
1366                         $outText = '<div class="mw-templatesUsedExplanation">';
1367                         if ( $preview ) {
1368                                 $outText .= wfMsgExt( 'templatesusedpreview', array( 'parse' ) );
1369                         } elseif ( $section ) {
1370                                 $outText .= wfMsgExt( 'templatesusedsection', array( 'parse' ) );
1371                         } else {
1372                                 $outText .= wfMsgExt( 'templatesused', array( 'parse' ) );
1373                         }
1374                         $outText .= '</div><ul>';
1375
1376                         usort( $templates, array( 'Title', 'compare' ) );
1377                         foreach ( $templates as $titleObj ) {
1378                                 $r = $titleObj->getRestrictions( 'edit' );
1379                                 if ( in_array( 'sysop', $r ) ) {
1380                                         $protected = wfMsgExt( 'template-protected', array( 'parseinline' ) );
1381                                 } elseif ( in_array( 'autoconfirmed', $r ) ) {
1382                                         $protected = wfMsgExt( 'template-semiprotected', array( 'parseinline' ) );
1383                                 } else {
1384                                         $protected = '';
1385                                 }
1386                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . ' ' . $protected . '</li>';
1387                         }
1388                         $outText .= '</ul>';
1389                 }
1390                 wfProfileOut( __METHOD__  );
1391                 return $outText;
1392         }
1393
1394         /**
1395          * Returns HTML for the "hidden categories on this page" list.
1396          *
1397          * @param array $hiddencats Array of hidden categories from Article::getHiddenCategories
1398          * or similar
1399          * @return string HTML output
1400          */
1401         public function formatHiddenCategories( $hiddencats) {
1402                 global $wgUser, $wgLang;
1403                 wfProfileIn( __METHOD__ );
1404
1405                 $sk = $wgUser->getSkin();
1406
1407                 $outText = '';
1408                 if ( count( $hiddencats ) > 0 ) {
1409                         # Construct the HTML
1410                         $outText = '<div class="mw-hiddenCategoriesExplanation">';
1411                         $outText .= wfMsgExt( 'hiddencategories', array( 'parse' ), $wgLang->formatnum( count( $hiddencats ) ) );
1412                         $outText .= '</div><ul>';
1413
1414                         foreach ( $hiddencats as $titleObj ) {
1415                                 $outText .= '<li>' . $sk->makeKnownLinkObj( $titleObj ) . '</li>'; # If it's hidden, it must exist - no need to check with a LinkBatch
1416                         }
1417                         $outText .= '</ul>';
1418                 }
1419                 wfProfileOut( __METHOD__  );
1420                 return $outText;
1421         }
1422
1423         /**
1424          * Format a size in bytes for output, using an appropriate
1425          * unit (B, KB, MB or GB) according to the magnitude in question
1426          *
1427          * @param $size Size to format
1428          * @return string
1429          */
1430         public function formatSize( $size ) {
1431                 global $wgLang;
1432                 return htmlspecialchars( $wgLang->formatSize( $size ) );
1433         }
1434
1435         /**
1436          * Given the id of an interface element, constructs the appropriate title
1437          * and accesskey attributes from the system messages.  (Note, this is usu-
1438          * ally the id but isn't always, because sometimes the accesskey needs to
1439          * go on a different element than the id, for reverse-compatibility, etc.)
1440          *
1441          * @param string $name Id of the element, minus prefixes.
1442          * @return string title and accesskey attributes, ready to drop in an
1443          *   element (e.g., ' title="This does something [x]" accesskey="x"').
1444          */
1445         public function tooltipAndAccesskey($name) {
1446                 $fname="Linker::tooltipAndAccesskey";
1447                 wfProfileIn($fname);
1448                 $out = '';
1449
1450                 $tooltip = wfMsg('tooltip-'.$name);
1451                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1452                         // Compatibility: formerly some tooltips had [alt-.] hardcoded
1453                         $tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
1454                         $out .= ' title="'.htmlspecialchars($tooltip);
1455                 }
1456                 $accesskey = wfMsg('accesskey-'.$name);
1457                 if ($accesskey && $accesskey != '-' && !wfEmptyMsg('accesskey-'.$name, $accesskey)) {
1458                         if ($out) $out .= " [$accesskey]\" accesskey=\"$accesskey\"";
1459                         else $out .= " title=\"[$accesskey]\" accesskey=\"$accesskey\"";
1460                 } elseif ($out) {
1461                         $out .= '"';
1462                 }
1463                 wfProfileOut($fname);
1464                 return $out;
1465         }
1466
1467         /**
1468          * Given the id of an interface element, constructs the appropriate title
1469          * attribute from the system messages.  (Note, this is usually the id but
1470          * isn't always, because sometimes the accesskey needs to go on a different
1471          * element than the id, for reverse-compatibility, etc.)
1472          *
1473          * @param string $name Id of the element, minus prefixes.
1474          * @return string title attribute, ready to drop in an element
1475          * (e.g., ' title="This does something"').
1476          */
1477         public function tooltip($name) {
1478                 $out = '';
1479
1480                 $tooltip = wfMsg('tooltip-'.$name);
1481                 if (!wfEmptyMsg('tooltip-'.$name, $tooltip) && $tooltip != '-') {
1482                         $out = ' title="'.htmlspecialchars($tooltip).'"';
1483                 }
1484
1485                 return $out;
1486         }
1487 }