includes/Linker.php

   1 <?php
   2 /**
   3  * Some internal bits split of from Skin.php. These functions are used
   4  * for primarily page content: links, embedded images, table of contents. Links
   5  * are also used in the skin.
   6  *
   7  * @ingroup Skins
   8  */
   9 class Linker {
  10
  11         /**
  12          * Flags for userToolLinks()
  13          */
  14         const TOOL_LINKS_NOBLOCK = 1;
  15
  16         /**
  17          * Get the appropriate HTML attributes to add to the "a" element of an ex-
  18          * ternal link, as created by [wikisyntax].
  19          *
  20          * @param $class String: the contents of the class attribute; if an empty
  21          *   string is passed, which is the default value, defaults to 'external'.
  22          * @deprecated Just pass the external class directly to something using Html::expandAttributes
  23          */
  24         static function getExternalLinkAttributes( $class = 'external' ) {
  25                 wfDeprecated( __METHOD__ );
  26                 return self::getLinkAttributesInternal( '', $class );
  27         }
  28
  29         /**
  30          * Get the appropriate HTML attributes to add to the "a" element of an in-
  31          * terwiki link.
  32          *
  33          * @param $title String: the title text for the link, URL-encoded (???) but
  34          *   not HTML-escaped
  35          * @param $unused String: unused
  36          * @param $class String: the contents of the class attribute; if an empty
  37          *   string is passed, which is the default value, defaults to 'external'.
  38          */
  39         static function getInterwikiLinkAttributes( $title, $unused = null, $class = 'external' ) {
  40                 global $wgContLang;
  41
  42                 # FIXME: We have a whole bunch of handling here that doesn't happen in
  43                 # getExternalLinkAttributes, why?
  44                 $title = urldecode( $title );
  45                 $title = $wgContLang->checkTitleEncoding( $title );
  46                 $title = preg_replace( '/[\\x00-\\x1f]/', ' ', $title );
  47
  48                 return self::getLinkAttributesInternal( $title, $class );
  49         }
  50
  51         /**
  52          * Get the appropriate HTML attributes to add to the "a" element of an in-
  53          * ternal link.
  54          *
  55          * @param $title String: the title text for the link, URL-encoded (???) but
  56          *   not HTML-escaped
  57          * @param $unused String: unused
  58          * @param $class String: the contents of the class attribute, default none
  59          */
  60         static function getInternalLinkAttributes( $title, $unused = null, $class = '' ) {
  61                 $title = urldecode( $title );
  62                 $title = str_replace( '_', ' ', $title );
  63                 return self::getLinkAttributesInternal( $title, $class );
  64         }
  65
  66         /**
  67          * Get the appropriate HTML attributes to add to the "a" element of an in-
  68          * ternal link, given the Title object for the page we want to link to.
  69          *
  70          * @param $nt Title
  71          * @param $unused String: unused
  72          * @param $class String: the contents of the class attribute, default none
  73          * @param $title Mixed: optional (unescaped) string to use in the title
  74          *   attribute; if false, default to the name of the page we're linking to
  75          */
  76         static function getInternalLinkAttributesObj( $nt, $unused = null, $class = '', $title = false ) {
  77                 if ( $title === false ) {
  78                         $title = $nt->getPrefixedText();
  79                 }
  80                 return self::getLinkAttributesInternal( $title, $class );
  81         }
  82
  83         /**
  84          * Common code for getLinkAttributesX functions
  85          */
  86         private static function getLinkAttributesInternal( $title, $class ) {
  87                 $title = htmlspecialchars( $title );
  88                 $class = htmlspecialchars( $class );
  89                 $r = '';
  90                 if ( $class != '' ) {
  91                         $r .= " class=\"$class\"";
  92                 }
  93                 if ( $title != '' ) {
  94                         $r .= " title=\"$title\"";
  95                 }
  96                 return $r;
  97         }
  98
  99         /**
 100          * Return the CSS colour of a known link
 101          *
 102          * @param $t Title object
 103          * @param $threshold Integer: user defined threshold
 104          * @return String: CSS class
 105          */
 106         static function getLinkColour( $t, $threshold ) {
 107                 $colour = '';
 108                 if ( $t->isRedirect() ) {
 109                         # Page is a redirect
 110                         $colour = 'mw-redirect';
 111                 } elseif ( $threshold > 0 &&
 112                            $t->exists() && $t->getLength() < $threshold &&
 113                            $t->isContentPage() ) {
 114                         # Page is a stub
 115                         $colour = 'stub';
 116                 }
 117                 return $colour;
 118         }
 119
 120         /**
 121          * This function returns an HTML link to the given target.  It serves a few
 122          * purposes:
 123          *   1) If $target is a Title, the correct URL to link to will be figured
 124          *      out automatically.
 125          *   2) It automatically adds the usual classes for various types of link
 126          *      targets: "new" for red links, "stub" for short articles, etc.
 127          *   3) It escapes all attribute values safely so there's no risk of XSS.
 128          *   4) It provides a default tooltip if the target is a Title (the page
 129          *      name of the target).
 130          * link() replaces the old functions in the makeLink() family.
 131          *
 132          * @param $target        Title  Can currently only be a Title, but this may
 133          *   change to support Images, literal URLs, etc.
 134          * @param $text          string The HTML contents of the <a> element, i.e.,
 135          *   the link text.  This is raw HTML and will not be escaped.  If null,
 136          *   defaults to the prefixed text of the Title; or if the Title is just a
 137          *   fragment, the contents of the fragment.
 138          * @param $customAttribs array  A key => value array of extra HTML attri-
 139          *   butes, such as title and class.  (href is ignored.)  Classes will be
 140          *   merged with the default classes, while other attributes will replace
 141          *   default attributes.  All passed attribute values will be HTML-escaped.
 142          *   A false attribute value means to suppress that attribute.
 143          * @param $query         array  The query string to append to the URL
 144          *   you're linking to, in key => value array form.  Query keys and values
 145          *   will be URL-encoded.
 146          * @param $options       mixed  String or array of strings:
 147          *     'known': Page is known to exist, so don't check if it does.
 148          *     'broken': Page is known not to exist, so don't check if it does.
 149          *     'noclasses': Don't add any classes automatically (includes "new",
 150          *       "stub", "mw-redirect", "extiw").  Only use the class attribute
 151          *       provided, if any, so you get a simple blue link with no funny i-
 152          *       cons.
 153          *     'forcearticlepath': Use the article path always, even with a querystring.
 154          *       Has compatibility issues on some setups, so avoid wherever possible.
 155          * @return string HTML <a> attribute
 156          */
 157         public static function link(
 158                 $target, $text = null, $customAttribs = array(), $query = array(), $options = array()
 159         ) {
 160                 wfProfileIn( __METHOD__ );
 161                 if ( !$target instanceof Title ) {
 162                         wfProfileOut( __METHOD__ );
 163                         return "<!-- ERROR -->$text";
 164                 }
 165                 $options = (array)$options;
 166
 167                 $dummy = new DummyLinker; // dummy linker instance for bc on the hooks
 168
 169                 $ret = null;
 170                 if ( !wfRunHooks( 'LinkBegin', array( $dummy, $target, &$text,
 171                 &$customAttribs, &$query, &$options, &$ret ) ) ) {
 172                         wfProfileOut( __METHOD__ );
 173                         return $ret;
 174                 }
 175
 176                 # Normalize the Title if it's a special page
 177                 $target = self::normaliseSpecialPage( $target );
 178
 179                 # If we don't know whether the page exists, let's find out.
 180                 wfProfileIn( __METHOD__ . '-checkPageExistence' );
 181                 if ( !in_array( 'known', $options ) and !in_array( 'broken', $options ) ) {
 182                         if ( $target->isKnown() ) {
 183                                 $options[] = 'known';
 184                         } else {
 185                                 $options[] = 'broken';
 186                         }
 187                 }
 188                 wfProfileOut( __METHOD__ . '-checkPageExistence' );
 189
 190                 $oldquery = array();
 191                 if ( in_array( "forcearticlepath", $options ) && $query ) {
 192                         $oldquery = $query;
 193                         $query = array();
 194                 }
 195
 196                 # Note: we want the href attribute first, for prettiness.
 197                 $attribs = array( 'href' => self::linkUrl( $target, $query, $options ) );
 198                 if ( in_array( 'forcearticlepath', $options ) && $oldquery ) {
 199                         $attribs['href'] = wfAppendQuery( $attribs['href'], wfArrayToCgi( $oldquery ) );
 200                 }
 201
 202                 $attribs = array_merge(
 203                         $attribs,
 204                         self::linkAttribs( $target, $customAttribs, $options )
 205                 );
 206                 if ( is_null( $text ) ) {
 207                         $text = self::linkText( $target );
 208                 }
 209
 210                 $ret = null;
 211                 if ( wfRunHooks( 'LinkEnd', array( $dummy, $target, $options, &$text, &$attribs, &$ret ) ) ) {
 212                         $ret = Html::rawElement( 'a', $attribs, $text );
 213                 }
 214
 215                 wfProfileOut( __METHOD__ );
 216                 return $ret;
 217         }
 218
 219         /**
 220          * Identical to link(), except $options defaults to 'known'.
 221          */
 222         public static function linkKnown(
 223                 $target, $text = null, $customAttribs = array(),
 224                 $query = array(), $options = array( 'known', 'noclasses' ) )
 225         {
 226                 return self::link( $target, $text, $customAttribs, $query, $options );
 227         }
 228
 229         /**
 230          * Returns the Url used to link to a Title
 231          *
 232          * @param $target Title
 233          */
 234         private static function linkUrl( $target, $query, $options ) {
 235                 wfProfileIn( __METHOD__ );
 236                 # We don't want to include fragments for broken links, because they
 237                 # generally make no sense.
 238                 if ( in_array( 'broken', $options ) && $target->mFragment !== '' ) {
 239                         $target = clone $target;
 240                         $target->mFragment = '';
 241                 }
 242
 243                 # If it's a broken link, add the appropriate query pieces, unless
 244                 # there's already an action specified, or unless 'edit' makes no sense
 245                 # (i.e., for a nonexistent special page).
 246                 if ( in_array( 'broken', $options ) && empty( $query['action'] )
 247                         && $target->getNamespace() != NS_SPECIAL ) {
 248                         $query['action'] = 'edit';
 249                         $query['redlink'] = '1';
 250                 }
 251                 $ret = $target->getLinkUrl( $query );
 252                 wfProfileOut( __METHOD__ );
 253                 return $ret;
 254         }
 255
 256         /**
 257          * Returns the array of attributes used when linking to the Title $target
 258          *
 259          * @param $target Title
 260          */
 261         private static function linkAttribs( $target, $attribs, $options ) {
 262                 wfProfileIn( __METHOD__ );
 263                 global $wgUser;
 264                 $defaults = array();
 265
 266                 if ( !in_array( 'noclasses', $options ) ) {
 267                         wfProfileIn( __METHOD__ . '-getClasses' );
 268                         # Now build the classes.
 269                         $classes = array();
 270
 271                         if ( in_array( 'broken', $options ) ) {
 272                                 $classes[] = 'new';
 273                         }
 274
 275                         if ( $target->isExternal() ) {
 276                                 $classes[] = 'extiw';
 277                         }
 278
 279                         if ( !in_array( 'broken', $options ) ) { # Avoid useless calls to LinkCache (see r50387)
 280                                 $colour = self::getLinkColour( $target, $wgUser->getStubThreshold() );
 281                                 if ( $colour !== '' ) {
 282                                         $classes[] = $colour; # mw-redirect or stub
 283                                 }
 284                         }
 285                         if ( $classes != array() ) {
 286                                 $defaults['class'] = implode( ' ', $classes );
 287                         }
 288                         wfProfileOut( __METHOD__ . '-getClasses' );
 289                 }
 290
 291                 # Get a default title attribute.
 292                 if ( $target->getPrefixedText() == '' ) {
 293                         # A link like [[#Foo]].  This used to mean an empty title
 294                         # attribute, but that's silly.  Just don't output a title.
 295                 } elseif ( in_array( 'known', $options ) ) {
 296                         $defaults['title'] = $target->getPrefixedText();
 297                 } else {
 298                         $defaults['title'] = wfMsg( 'red-link-title', $target->getPrefixedText() );
 299                 }
 300
 301                 # Finally, merge the custom attribs with the default ones, and iterate
 302                 # over that, deleting all "false" attributes.
 303                 $ret = array();
 304                 $merged = Sanitizer::mergeAttributes( $defaults, $attribs );
 305                 foreach ( $merged as $key => $val ) {
 306                         # A false value suppresses the attribute, and we don't want the
 307                         # href attribute to be overridden.
 308                         if ( $key != 'href' and $val !== false ) {
 309                                 $ret[$key] = $val;
 310                         }
 311                 }
 312                 wfProfileOut( __METHOD__ );
 313                 return $ret;
 314         }
 315
 316         /**
 317          * Default text of the links to the Title $target
 318          *
 319          * @param $target Title
 320          */
 321         private static function linkText( $target ) {
 322                 # We might be passed a non-Title by make*LinkObj().  Fail gracefully.
 323                 if ( !$target instanceof Title ) {
 324                         return '';
 325                 }
 326
 327                 # If the target is just a fragment, with no title, we return the frag-
 328                 # ment text.  Otherwise, we return the title text itself.
 329                 if ( $target->getPrefixedText() === '' && $target->getFragment() !== '' ) {
 330                         return htmlspecialchars( $target->getFragment() );
 331                 }
 332                 return htmlspecialchars( $target->getPrefixedText() );
 333         }
 334
 335         /**
 336          * Generate either a normal exists-style link or a stub link, depending
 337          * on the given page size.
 338          *
 339          * @param $size Integer
 340          * @param $nt Title object.
 341          * @param $text String
 342          * @param $query String
 343          * @param $trail String
 344          * @param $prefix String
 345          * @return string HTML of link
 346          * @deprecated since 1.17
 347          */
 348         static function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 349                 global $wgUser;
 350                 wfDeprecated( __METHOD__ );
 351
 352                 $threshold = $wgUser->getStubThreshold();
 353                 $colour = ( $size < $threshold ) ? 'stub' : '';
 354                 // FIXME: replace deprecated makeColouredLinkObj by link()
 355                 return self::makeColouredLinkObj( $nt, $colour, $text, $query, $trail, $prefix );
 356         }
 357
 358         /**
 359          * Make appropriate markup for a link to the current article. This is currently rendered
 360          * as the bold link text. The calling sequence is the same as the other make*LinkObj static functions,
 361          * despite $query not being used.
 362          *
 363          * @param $nt Title
 364          */
 365         static function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 366                 if ( $text == '' ) {
 367                         $text = htmlspecialchars( $nt->getPrefixedText() );
 368                 }
 369                 list( $inside, $trail ) = self::splitTrail( $trail );
 370                 return "<strong class=\"selflink\">{$prefix}{$text}{$inside}</strong>{$trail}";
 371         }
 372
 373         static function normaliseSpecialPage( Title $title ) {
 374                 if ( $title->getNamespace() == NS_SPECIAL ) {
 375                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 376                         if ( !$name ) {
 377                                 return $title;
 378                         }
 379                         $ret = SpecialPage::getTitleFor( $name, $subpage );
 380                         $ret->mFragment = $title->getFragment();
 381                         return $ret;
 382                 } else {
 383                         return $title;
 384                 }
 385         }
 386
 387         /**
 388          * Returns the filename part of an url.
 389          * Used as alternative text for external images.
 390          */
 391         static function fnamePart( $url ) {
 392                 $basename = strrchr( $url, '/' );
 393                 if ( false === $basename ) {
 394                         $basename = $url;
 395                 } else {
 396                         $basename = substr( $basename, 1 );
 397                 }
 398                 return $basename;
 399         }
 400
 401         /**
 402          * Return the code for images which were added via external links,
 403          * via Parser::maybeMakeExternalImage().
 404          */
 405         static function makeExternalImage( $url, $alt = '' ) {
 406                 if ( $alt == '' ) {
 407                         $alt = self::fnamePart( $url );
 408                 }
 409                 $img = '';
 410                 $success = wfRunHooks( 'LinkerMakeExternalImage', array( &$url, &$alt, &$img ) );
 411                 if ( !$success ) {
 412                         wfDebug( "Hook LinkerMakeExternalImage changed the output of external image with url {$url} and alt text {$alt} to {$img}\n", true );
 413                         return $img;
 414                 }
 415                 return Html::element( 'img',
 416                         array(
 417                                 'src' => $url,
 418                                 'alt' => $alt ) );
 419         }
 420
 421         /**
 422          * Given parameters derived from [[Image:Foo|options...]], generate the
 423          * HTML that that syntax inserts in the page.
 424          *
 425          * @param $title Title object
 426          * @param $file File object, or false if it doesn't exist
 427          * @param $frameParams Array: associative array of parameters external to the media handler.
 428          *     Boolean parameters are indicated by presence or absence, the value is arbitrary and
 429          *     will often be false.
 430          *          thumbnail       If present, downscale and frame
 431          *          manualthumb     Image name to use as a thumbnail, instead of automatic scaling
 432          *          framed          Shows image in original size in a frame
 433          *          frameless       Downscale but don't frame
 434          *          upright         If present, tweak default sizes for portrait orientation
 435          *          upright_factor  Fudge factor for "upright" tweak (default 0.75)
 436          *          border          If present, show a border around the image
 437          *          align           Horizontal alignment (left, right, center, none)
 438          *          valign          Vertical alignment (baseline, sub, super, top, text-top, middle,
 439          *                          bottom, text-bottom)
 440          *          alt             Alternate text for image (i.e. alt attribute). Plain text.
 441          *          caption         HTML for image caption.
 442          *          link-url        URL to link to
 443          *          link-title      Title object to link to
 444          *          link-target     Value for the target attribue, only with link-url
 445          *          no-link         Boolean, suppress description link
 446          *
 447          * @param $handlerParams Array: associative array of media handler parameters, to be passed
 448          *       to transform(). Typical keys are "width" and "page".
 449          * @param $time String: timestamp of the file, set as false for current
 450          * @param $query String: query params for desc url
 451          * @param $widthOption: Used by the parser to remember the user preference thumbnailsize
 452          * @return String: HTML for an image, with links, wrappers, etc.
 453          */
 454         static function makeImageLink2( Title $title, $file, $frameParams = array(),
 455                 $handlerParams = array(), $time = false, $query = "", $widthOption = null )
 456         {
 457                 $res = null;
 458                 $dummy = new DummyLinker;
 459                 if ( !wfRunHooks( 'ImageBeforeProduceHTML', array( &$dummy, &$title,
 460                         &$file, &$frameParams, &$handlerParams, &$time, &$res ) ) ) {
 461                         return $res;
 462                 }
 463
 464                 if ( $file && !$file->allowInlineDisplay() ) {
 465                         wfDebug( __METHOD__ . ': ' . $title->getPrefixedDBkey() . " does not allow inline display\n" );
 466                         return self::link( $title );
 467                 }
 468
 469                 // Shortcuts
 470                 $fp =& $frameParams;
 471                 $hp =& $handlerParams;
 472
 473                 // Clean up parameters
 474                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 475                 if ( !isset( $fp['align'] ) ) {
 476                         $fp['align'] = '';
 477                 }
 478                 if ( !isset( $fp['alt'] ) ) {
 479                         $fp['alt'] = '';
 480                 }
 481                 if ( !isset( $fp['title'] ) ) {
 482                         $fp['title'] = '';
 483                 }
 484
 485                 $prefix = $postfix = '';
 486
 487                 if ( 'center' == $fp['align'] ) {
 488                         $prefix  = '<div class="center">';
 489                         $postfix = '</div>';
 490                         $fp['align']   = 'none';
 491                 }
 492                 if ( $file && !isset( $hp['width'] ) ) {
 493                         $hp['width'] = $file->getWidth( $page );
 494
 495                         if ( isset( $fp['thumbnail'] ) || isset( $fp['framed'] ) || isset( $fp['frameless'] ) || !$hp['width'] ) {
 496                                 global $wgThumbLimits, $wgThumbUpright;
 497                                 if ( !isset( $widthOption ) || !isset( $wgThumbLimits[$widthOption] ) ) {
 498                                         $widthOption = User::getDefaultOption( 'thumbsize' );
 499                                 }
 500
 501                                 // Reduce width for upright images when parameter 'upright' is used
 502                                 if ( isset( $fp['upright'] ) && $fp['upright'] == 0 ) {
 503                                         $fp['upright'] = $wgThumbUpright;
 504                                 }
 505                                 // 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
 506                                 $prefWidth = isset( $fp['upright'] ) ?
 507                                         round( $wgThumbLimits[$widthOption] * $fp['upright'], -1 ) :
 508                                         $wgThumbLimits[$widthOption];
 509
 510                                 // Use width which is smaller: real image width or user preference width
 511                                 // Unless image is scalable vector.
 512                                 if ( !isset( $hp['height'] ) && ( $hp['width'] <= 0 ||
 513                                                 $prefWidth < $hp['width'] || $file->isVectorized() ) ) {
 514                                         $hp['width'] = $prefWidth;
 515                                 }
 516                         }
 517                 }
 518
 519                 if ( isset( $fp['thumbnail'] ) || isset( $fp['manualthumb'] ) || isset( $fp['framed'] ) ) {
 520                         global $wgContLang;
 521                         # Create a thumbnail. Alignment depends on language
 522                         # writing direction, # right aligned for left-to-right-
 523                         # languages ("Western languages"), left-aligned
 524                         # for right-to-left-languages ("Semitic languages")
 525                         #
 526                         # If  thumbnail width has not been provided, it is set
 527                         # to the default user option as specified in Language*.php
 528                         if ( $fp['align'] == '' ) {
 529                                 $fp['align'] = $wgContLang->alignEnd();
 530                         }
 531                         return $prefix . self::makeThumbLink2( $title, $file, $fp, $hp, $time, $query ) . $postfix;
 532                 }
 533
 534                 if ( $file && isset( $fp['frameless'] ) ) {
 535                         $srcWidth = $file->getWidth( $page );
 536                         # For "frameless" option: do not present an image bigger than the source (for bitmap-style images)
 537                         # This is the same behaviour as the "thumb" option does it already.
 538                         if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 539                                 $hp['width'] = $srcWidth;
 540                         }
 541                 }
 542
 543                 if ( $file && isset( $hp['width'] ) ) {
 544                         # Create a resized image, without the additional thumbnail features
 545                         $thumb = $file->transform( $hp );
 546                 } else {
 547                         $thumb = false;
 548                 }
 549
 550                 if ( !$thumb ) {
 551                         $s = self::makeBrokenImageLinkObj( $title, $fp['title'], '', '', '', $time == true );
 552                 } else {
 553                         $params = array(
 554                                 'alt' => $fp['alt'],
 555                                 'title' => $fp['title'],
 556                                 'valign' => isset( $fp['valign'] ) ? $fp['valign'] : false ,
 557                                 'img-class' => isset( $fp['border'] ) ? 'thumbborder' : false );
 558                         $params = self::getImageLinkMTOParams( $fp, $query ) + $params;
 559
 560                         $s = $thumb->toHtml( $params );
 561                 }
 562                 if ( $fp['align'] != '' ) {
 563                         $s = "<div class=\"float{$fp['align']}\">{$s}</div>";
 564                 }
 565                 return str_replace( "\n", ' ', $prefix . $s . $postfix );
 566         }
 567
 568         /**
 569          * Get the link parameters for MediaTransformOutput::toHtml() from given
 570          * frame parameters supplied by the Parser.
 571          * @param $frameParams The frame parameters
 572          * @param $query An optional query string to add to description page links
 573          */
 574         static function getImageLinkMTOParams( $frameParams, $query = '' ) {
 575                 $mtoParams = array();
 576                 if ( isset( $frameParams['link-url'] ) && $frameParams['link-url'] !== '' ) {
 577                         $mtoParams['custom-url-link'] = $frameParams['link-url'];
 578                         if ( isset( $frameParams['link-target'] ) ) {
 579                                 $mtoParams['custom-target-link'] = $frameParams['link-target'];
 580                         }
 581                 } elseif ( isset( $frameParams['link-title'] ) && $frameParams['link-title'] !== '' ) {
 582                         $mtoParams['custom-title-link'] = self::normaliseSpecialPage( $frameParams['link-title'] );
 583                 } elseif ( !empty( $frameParams['no-link'] ) ) {
 584                         // No link
 585                 } else {
 586                         $mtoParams['desc-link'] = true;
 587                         $mtoParams['desc-query'] = $query;
 588                 }
 589                 return $mtoParams;
 590         }
 591
 592         /**
 593          * Make HTML for a thumbnail including image, border and caption
 594          * @param $title Title object
 595          * @param $file File object or false if it doesn't exist
 596          * @param $label String
 597          * @param $alt String
 598          * @param $align String
 599          * @param $params Array
 600          * @param $framed Boolean
 601          * @param $manualthumb String
 602          */
 603         static function makeThumbLinkObj( Title $title, $file, $label = '', $alt,
 604                 $align = 'right', $params = array(), $framed = false , $manualthumb = "" )
 605         {
 606                 $frameParams = array(
 607                         'alt' => $alt,
 608                         'caption' => $label,
 609                         'align' => $align
 610                 );
 611                 if ( $framed ) {
 612                         $frameParams['framed'] = true;
 613                 }
 614                 if ( $manualthumb ) {
 615                         $frameParams['manualthumb'] = $manualthumb;
 616                 }
 617                 return self::makeThumbLink2( $title, $file, $frameParams, $params );
 618         }
 619
 620         /**
 621          * @param $title Title
 622          * @param  $file File
 623          * @param array $frameParams
 624          * @param array $handlerParams
 625          * @param bool $time
 626          * @param string $query
 627          * @return mixed
 628          */
 629         static function makeThumbLink2( Title $title, $file, $frameParams = array(),
 630                 $handlerParams = array(), $time = false, $query = "" )
 631         {
 632                 global $wgStylePath, $wgContLang;
 633                 $exists = $file && $file->exists();
 634
 635                 # Shortcuts
 636                 $fp =& $frameParams;
 637                 $hp =& $handlerParams;
 638
 639                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 640                 if ( !isset( $fp['align'] ) ) $fp['align'] = 'right';
 641                 if ( !isset( $fp['alt'] ) ) $fp['alt'] = '';
 642                 if ( !isset( $fp['title'] ) ) $fp['title'] = '';
 643                 if ( !isset( $fp['caption'] ) ) $fp['caption'] = '';
 644
 645                 if ( empty( $hp['width'] ) ) {
 646                         // Reduce width for upright images when parameter 'upright' is used
 647                         $hp['width'] = isset( $fp['upright'] ) ? 130 : 180;
 648                 }
 649                 $thumb = false;
 650
 651                 if ( !$exists ) {
 652                         $outerWidth = $hp['width'] + 2;
 653                 } else {
 654                         if ( isset( $fp['manualthumb'] ) ) {
 655                                 # Use manually specified thumbnail
 656                                 $manual_title = Title::makeTitleSafe( NS_FILE, $fp['manualthumb'] );
 657                                 if ( $manual_title ) {
 658                                         $manual_img = wfFindFile( $manual_title );
 659                                         if ( $manual_img ) {
 660                                                 $thumb = $manual_img->getUnscaledThumb( $hp );
 661                                         } else {
 662                                                 $exists = false;
 663                                         }
 664                                 }
 665                         } elseif ( isset( $fp['framed'] ) ) {
 666                                 // Use image dimensions, don't scale
 667                                 $thumb = $file->getUnscaledThumb( $hp );
 668                         } else {
 669                                 # Do not present an image bigger than the source, for bitmap-style images
 670                                 # This is a hack to maintain compatibility with arbitrary pre-1.10 behaviour
 671                                 $srcWidth = $file->getWidth( $page );
 672                                 if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 673                                         $hp['width'] = $srcWidth;
 674                                 }
 675                                 $thumb = $file->transform( $hp );
 676                         }
 677
 678                         if ( $thumb ) {
 679                                 $outerWidth = $thumb->getWidth() + 2;
 680                         } else {
 681                                 $outerWidth = $hp['width'] + 2;
 682                         }
 683                 }
 684
 685                 # ThumbnailImage::toHtml() already adds page= onto the end of DjVu URLs
 686                 # So we don't need to pass it here in $query. However, the URL for the
 687                 # zoom icon still needs it, so we make a unique query for it. See bug 14771
 688                 $url = $title->getLocalURL( $query );
 689                 if ( $page ) {
 690                         $url = wfAppendQuery( $url, 'page=' . urlencode( $page ) );
 691                 }
 692
 693                 $s = "<div class=\"thumb t{$fp['align']}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
 694                 if ( !$exists ) {
 695                         $s .= self::makeBrokenImageLinkObj( $title, $fp['title'], '', '', '', $time == true );
 696                         $zoomIcon = '';
 697                 } elseif ( !$thumb ) {
 698                         $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
 699                         $zoomIcon = '';
 700                 } else {
 701                         $params = array(
 702                                 'alt' => $fp['alt'],
 703                                 'title' => $fp['title'],
 704                                 'img-class' => 'thumbimage' );
 705                         $params = self::getImageLinkMTOParams( $fp, $query ) + $params;
 706                         $s .= $thumb->toHtml( $params );
 707                         if ( isset( $fp['framed'] ) ) {
 708                                 $zoomIcon = "";
 709                         } else {
 710                                 $zoomIcon = Html::rawElement( 'div', array( 'class' => 'magnify' ),
 711                                         Html::rawElement( 'a', array(
 712                                                 'href' => $url,
 713                                                 'class' => 'internal',
 714                                                 'title' => wfMsg( 'thumbnail-more' ) ),
 715                                                 Html::element( 'img', array(
 716                                                         'src' => $wgStylePath . '/common/images/magnify-clip' . ( $wgContLang->isRTL() ? '-rtl' : '' ) . '.png',
 717                                                         'width' => 15,
 718                                                         'height' => 11,
 719                                                         'alt' => "" ) ) ) );
 720                         }
 721                 }
 722                 $s .= '  <div class="thumbcaption">' . $zoomIcon . $fp['caption'] . "</div></div></div>";
 723                 return str_replace( "\n", ' ', $s );
 724         }
 725
 726         /**
 727          * Make a "broken" link to an image
 728          *
 729          * @param $title Title object
 730          * @param $text String: link label in unescaped text form
 731          * @param $query String: query string
 732          * @param $trail String: link trail (HTML fragment)
 733          * @param $prefix String: link prefix (HTML fragment)
 734          * @param $time Boolean: a file of a certain timestamp was requested
 735          * @return String
 736          */
 737         public static function makeBrokenImageLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '', $time = false ) {
 738                 global $wgEnableUploads, $wgUploadMissingFileUrl;
 739                 if ( $title instanceof Title ) {
 740                         wfProfileIn( __METHOD__ );
 741                         $currentExists = $time ? ( wfFindFile( $title ) != false ) : false;
 742
 743                         list( $inside, $trail ) = self::splitTrail( $trail );
 744                         if ( $text == '' )
 745                                 $text = htmlspecialchars( $title->getPrefixedText() );
 746
 747                         if ( ( $wgUploadMissingFileUrl || $wgEnableUploads ) && !$currentExists ) {
 748                                 $redir = RepoGroup::singleton()->getLocalRepo()->checkRedirect( $title );
 749
 750                                 if ( $redir ) {
 751                                         wfProfileOut( __METHOD__ );
 752                                         return self::linkKnown( $title, "$prefix$text$inside", array(), $query ) . $trail;
 753                                 }
 754
 755                                 $href = self::getUploadUrl( $title, $query );
 756
 757                                 wfProfileOut( __METHOD__ );
 758                                 return '<a href="' . htmlspecialchars( $href ) . '" class="new" title="' .
 759                                         htmlspecialchars( $title->getPrefixedText(), ENT_QUOTES ) . '">' .
 760                                         "$prefix$text$inside</a>$trail";
 761                         } else {
 762                                 wfProfileOut( __METHOD__ );
 763                                 return self::linkKnown( $title, "$prefix$text$inside", array(), $query ) . $trail;
 764                         }
 765                 } else {
 766                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 767                 }
 768         }
 769
 770         /**
 771          * Get the URL to upload a certain file
 772          *
 773          * @param $destFile Title object of the file to upload
 774          * @param $query String: urlencoded query string to prepend
 775          * @return String: urlencoded URL
 776          */
 777         protected static function getUploadUrl( $destFile, $query = '' ) {
 778                 global $wgUploadMissingFileUrl;
 779                 $q = 'wpDestFile=' . $destFile->getPartialUrl();
 780                 if ( $query != '' )
 781                         $q .= '&' . $query;
 782
 783                 if ( $wgUploadMissingFileUrl ) {
 784                         return wfAppendQuery( $wgUploadMissingFileUrl, $q );
 785                 } else {
 786                         $upload = SpecialPage::getTitleFor( 'Upload' );
 787                         return $upload->getLocalUrl( $q );
 788                 }
 789         }
 790
 791         /**
 792          * Create a direct link to a given uploaded file.
 793          *
 794          * @param $title Title object.
 795          * @param $text String: pre-sanitized HTML
 796          * @param $time string: MW timestamp of file creation time
 797          * @return String: HTML
 798          */
 799         public static function makeMediaLinkObj( $title, $text = '', $time = false ) {
 800                 $img = wfFindFile( $title, array( 'time' => $time ) );
 801                 return self::makeMediaLinkFile( $title, $img, $text );
 802         }
 803
 804         /**
 805          * Create a direct link to a given uploaded file.
 806          * This will make a broken link if $file is false.
 807          *
 808          * @param $title Title object.
 809          * @param $file mixed File object or false
 810          * @param $text String: pre-sanitized HTML
 811          * @return String: HTML
 812          *
 813          * @todo Handle invalid or missing images better.
 814          */
 815         public static function makeMediaLinkFile( Title $title, $file, $text = '' ) {
 816                 if ( $file && $file->exists() ) {
 817                         $url = $file->getURL();
 818                         $class = 'internal';
 819                 } else {
 820                         $url = self::getUploadUrl( $title );
 821                         $class = 'new';
 822                 }
 823                 $alt = htmlspecialchars( $title->getText(), ENT_QUOTES );
 824                 if ( $text == '' ) {
 825                         $text = $alt;
 826                 }
 827                 $u = htmlspecialchars( $url );
 828                 return "<a href=\"{$u}\" class=\"$class\" title=\"{$alt}\">{$text}</a>";
 829         }
 830
 831         /**
 832          *  Make a link to a special page given its name and, optionally,
 833          * a message key from the link text.
 834          * Usage example: $skin->specialLink( 'recentchanges' )
 835          */
 836         static function specialLink( $name, $key = '' ) {
 837                 if ( $key == '' ) { $key = strtolower( $name ); }
 838
 839                 return self::linkKnown( SpecialPage::getTitleFor( $name ) , wfMsg( $key ) );
 840         }
 841
 842         /**
 843          * Make an external link
 844          * @param $url String: URL to link to
 845          * @param $text String: text of link
 846          * @param $escape Boolean: do we escape the link text?
 847          * @param $linktype String: type of external link. Gets added to the classes
 848          * @param $attribs Array of extra attributes to <a>
 849          */
 850         static function makeExternalLink( $url, $text, $escape = true, $linktype = '', $attribs = array() ) {
 851                 $class = "external";
 852                 if ( isset($linktype) && $linktype ) {
 853                         $class .= " $linktype";
 854                 }
 855                 if ( isset($attribs['class']) && $attribs['class'] ) {
 856                         $class .= " {$attribs['class']}";
 857                 }
 858                 $attribs['class'] = $class;
 859
 860                 if ( $escape ) {
 861                         $text = htmlspecialchars( $text );
 862                 }
 863                 $link = '';
 864                 $success = wfRunHooks( 'LinkerMakeExternalLink',
 865                         array( &$url, &$text, &$link, &$attribs, $linktype ) );
 866                 if ( !$success ) {
 867                         wfDebug( "Hook LinkerMakeExternalLink changed the output of link with url {$url} and text {$text} to {$link}\n", true );
 868                         return $link;
 869                 }
 870                 $attribs['href'] = $url;
 871                 return Html::rawElement( 'a', $attribs, $text );
 872         }
 873
 874         /**
 875          * Make user link (or user contributions for unregistered users)
 876          * @param $userId   Integer: user id in database.
 877          * @param $userText String: user name in database
 878          * @return String: HTML fragment
 879          * @private
 880          */
 881         static function userLink( $userId, $userText ) {
 882                 if ( $userId == 0 ) {
 883                         $page = SpecialPage::getTitleFor( 'Contributions', $userText );
 884                 } else {
 885                         $page = Title::makeTitle( NS_USER, $userText );
 886                 }
 887                 return self::link( $page, htmlspecialchars( $userText ), array( 'class' => 'mw-userlink' ) );
 888         }
 889
 890         /**
 891          * Generate standard user tool links (talk, contributions, block link, etc.)
 892          *
 893          * @param $userId Integer: user identifier
 894          * @param $userText String: user name or IP address
 895          * @param $redContribsWhenNoEdits Boolean: should the contributions link be
 896          *        red if the user has no edits?
 897          * @param $flags Integer: customisation flags (e.g. Linker::TOOL_LINKS_NOBLOCK)
 898          * @param $edits Integer: user edit count (optional, for performance)
 899          * @return String: HTML fragment
 900          */
 901         public static function userToolLinks(
 902                 $userId, $userText, $redContribsWhenNoEdits = false, $flags = 0, $edits = null
 903         ) {
 904                 global $wgUser, $wgDisableAnonTalk, $wgLang;
 905                 $talkable = !( $wgDisableAnonTalk && 0 == $userId );
 906                 $blockable = !$flags & self::TOOL_LINKS_NOBLOCK;
 907
 908                 $items = array();
 909                 if ( $talkable ) {
 910                         $items[] = self::userTalkLink( $userId, $userText );
 911                 }
 912                 if ( $userId ) {
 913                         // check if the user has an edit
 914                         $attribs = array();
 915                         if ( $redContribsWhenNoEdits ) {
 916                                 $count = !is_null( $edits ) ? $edits : User::edits( $userId );
 917                                 if ( $count == 0 ) {
 918                                         $attribs['class'] = 'new';
 919                                 }
 920                         }
 921                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 922
 923                         $items[] = self::link( $contribsPage, wfMsgHtml( 'contribslink' ), $attribs );
 924                 }
 925                 if ( $blockable && $wgUser->isAllowed( 'block' ) ) {
 926                         $items[] = self::blockLink( $userId, $userText );
 927                 }
 928
 929                 if ( $items ) {
 930                         return ' <span class="mw-usertoollinks">(' . $wgLang->pipeList( $items ) . ')</span>';
 931                 } else {
 932                         return '';
 933                 }
 934         }
 935
 936         /**
 937          * Alias for userToolLinks( $userId, $userText, true );
 938          * @param $userId Integer: user identifier
 939          * @param $userText String: user name or IP address
 940          * @param $edits Integer: user edit count (optional, for performance)
 941          */
 942         public static function userToolLinksRedContribs( $userId, $userText, $edits = null ) {
 943                 return self::userToolLinks( $userId, $userText, true, 0, $edits );
 944         }
 945
 946
 947         /**
 948          * @param $userId Integer: user id in database.
 949          * @param $userText String: user name in database.
 950          * @return String: HTML fragment with user talk link
 951          * @private
 952          */
 953         static function userTalkLink( $userId, $userText ) {
 954                 $userTalkPage = Title::makeTitle( NS_USER_TALK, $userText );
 955                 $userTalkLink = self::link( $userTalkPage, wfMsgHtml( 'talkpagelinktext' ) );
 956                 return $userTalkLink;
 957         }
 958
 959         /**
 960          * @param $userId Integer: userid
 961          * @param $userText String: user name in database.
 962          * @return String: HTML fragment with block link
 963          * @private
 964          */
 965         static function blockLink( $userId, $userText ) {
 966                 $blockPage = SpecialPage::getTitleFor( 'Block', $userText );
 967                 $blockLink = self::link( $blockPage, wfMsgHtml( 'blocklink' ) );
 968                 return $blockLink;
 969         }
 970
 971         /**
 972          * Generate a user link if the current user is allowed to view it
 973          * @param $rev Revision object.
 974          * @param $isPublic Boolean: show only if all users can see it
 975          * @return String: HTML fragment
 976          */
 977         static function revUserLink( $rev, $isPublic = false ) {
 978                 if ( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
 979                         $link = wfMsgHtml( 'rev-deleted-user' );
 980                 } else if ( $rev->userCan( Revision::DELETED_USER ) ) {
 981                         $link = self::userLink( $rev->getUser( Revision::FOR_THIS_USER ),
 982                                 $rev->getUserText( Revision::FOR_THIS_USER ) );
 983                 } else {
 984                         $link = wfMsgHtml( 'rev-deleted-user' );
 985                 }
 986                 if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
 987                         return '<span class="history-deleted">' . $link . '</span>';
 988                 }
 989                 return $link;
 990         }
 991
 992         /**
 993          * Generate a user tool link cluster if the current user is allowed to view it
 994          * @param $rev Revision object.
 995          * @param $isPublic Boolean: show only if all users can see it
 996          * @return string HTML
 997          */
 998         static function revUserTools( $rev, $isPublic = false ) {
 999                 if ( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
1000                         $link = wfMsgHtml( 'rev-deleted-user' );
1001                 } else if ( $rev->userCan( Revision::DELETED_USER ) ) {
1002                         $userId = $rev->getUser( Revision::FOR_THIS_USER );
1003                         $userText = $rev->getUserText( Revision::FOR_THIS_USER );
1004                         $link = self::userLink( $userId, $userText ) .
1005                                 ' ' . self::userToolLinks( $userId, $userText );
1006                 } else {
1007                         $link = wfMsgHtml( 'rev-deleted-user' );
1008                 }
1009                 if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
1010                         return ' <span class="history-deleted">' . $link . '</span>';
1011                 }
1012                 return $link;
1013         }
1014
1015         /**
1016          * This function is called by all recent changes variants, by the page history,
1017          * and by the user contributions list. It is responsible for formatting edit
1018          * comments. It escapes any HTML in the comment, but adds some CSS to format
1019          * auto-generated comments (from section editing) and formats [[wikilinks]].
1020          *
1021          * @author Erik Moeller <moeller@scireview.de>
1022          *
1023          * Note: there's not always a title to pass to this function.
1024          * Since you can't set a default parameter for a reference, I've turned it
1025          * temporarily to a value pass. Should be adjusted further. --brion
1026          *
1027          * @param $comment String
1028          * @param $title Mixed: Title object (to generate link to the section in autocomment) or null
1029          * @param $local Boolean: whether section links should refer to local page
1030          */
1031         static function formatComment( $comment, $title = null, $local = false ) {
1032                 wfProfileIn( __METHOD__ );
1033
1034                 # Sanitize text a bit:
1035                 $comment = str_replace( "\n", " ", $comment );
1036                 # Allow HTML entities (for bug 13815)
1037                 $comment = Sanitizer::escapeHtmlAllowEntities( $comment );
1038
1039                 # Render autocomments and make links:
1040                 $comment = self::formatAutocomments( $comment, $title, $local );
1041                 $comment = self::formatLinksInComment( $comment, $title, $local );
1042
1043                 wfProfileOut( __METHOD__ );
1044                 return $comment;
1045         }
1046
1047         static $autocommentTitle;
1048         static $autocommentLocal;
1049
1050         /**
1051          * The pattern for autogen comments is / * foo * /, which makes for
1052          * some nasty regex.
1053          * We look for all comments, match any text before and after the comment,
1054          * add a separator where needed and format the comment itself with CSS
1055          * Called by Linker::formatComment.
1056          *
1057          * @param $comment String: comment text
1058          * @param $title An optional title object used to links to sections
1059          * @param $local Boolean: whether section links should refer to local page
1060          * @return String: formatted comment
1061          */
1062         private static function formatAutocomments( $comment, $title = null, $local = false ) {
1063                 // Bah!
1064                 self::$autocommentTitle = $title;
1065                 self::$autocommentLocal = $local;
1066                 $comment = preg_replace_callback(
1067                         '!(.*)/\*\s*(.*?)\s*\*/(.*)!',
1068                         array( 'Linker', 'formatAutocommentsCallback' ),
1069                         $comment );
1070                 self::$autocommentTitle = null;
1071                 self::$autocommentLocal = null;
1072                 return $comment;
1073         }
1074
1075         private static function formatAutocommentsCallback( $match ) {
1076                 $title = self::$autocommentTitle;
1077                 $local = self::$autocommentLocal;
1078
1079                 $pre = $match[1];
1080                 $auto = $match[2];
1081                 $post = $match[3];
1082                 $link = '';
1083                 if ( $title ) {
1084                         $section = $auto;
1085
1086                         # Remove links that a user may have manually put in the autosummary
1087                         # This could be improved by copying as much of Parser::stripSectionName as desired.
1088                         $section = str_replace( '[[:', '', $section );
1089                         $section = str_replace( '[[', '', $section );
1090                         $section = str_replace( ']]', '', $section );
1091
1092                         $section = Sanitizer::normalizeSectionNameWhitespace( $section ); # bug 22784
1093                         if ( $local ) {
1094                                 $sectionTitle = Title::newFromText( '#' . $section );
1095                         } else {
1096                                 $sectionTitle = Title::makeTitleSafe( $title->getNamespace(),
1097                                         $title->getDBkey(), $section );
1098                         }
1099                         if ( $sectionTitle ) {
1100                                 $link = self::link( $sectionTitle,
1101                                         htmlspecialchars( wfMsgForContent( 'sectionlink' ) ), array(), array(),
1102                                         'noclasses' );
1103                         } else {
1104                                 $link = '';
1105                         }
1106                 }
1107                 $auto = "$link$auto";
1108                 if ( $pre ) {
1109                         # written summary $presep autocomment (summary /* section */)
1110                         $auto = wfMsgExt( 'autocomment-prefix', array( 'escapenoentities', 'content' ) ) . $auto;
1111                 }
1112                 if ( $post ) {
1113                         # autocomment $postsep written summary (/* section */ summary)
1114                         $auto .= wfMsgExt( 'colon-separator', array( 'escapenoentities', 'content' ) );
1115                 }
1116                 $auto = '<span class="autocomment">' . $auto . '</span>';
1117                 $comment = $pre . $auto . $post;
1118                 return $comment;
1119         }
1120
1121         static $commentContextTitle;
1122         static $commentLocal;
1123
1124         /**
1125          * Formats wiki links and media links in text; all other wiki formatting
1126          * is ignored
1127          *
1128          * @todo Fixme: doesn't handle sub-links as in image thumb texts like the main parser
1129          * @param $comment String: text to format links in
1130          * @param $title An optional title object used to links to sections
1131          * @param $local Boolean: whether section links should refer to local page
1132          * @return String
1133          */
1134         public static function formatLinksInComment( $comment, $title = null, $local = false ) {
1135                 self::$commentContextTitle = $title;
1136                 self::$commentLocal = $local;
1137                 $html = preg_replace_callback(
1138                         '/\[\[:?(.*?)(\|(.*?))*\]\]([^[]*)/',
1139                         array( 'Linker', 'formatLinksInCommentCallback' ),
1140                         $comment );
1141                 self::$commentContextTitle = null;
1142                 self::$commentLocal = null;
1143                 return $html;
1144         }
1145
1146         protected static function formatLinksInCommentCallback( $match ) {
1147                 global $wgContLang;
1148
1149                 $medians = '(?:' . preg_quote( MWNamespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
1150                 $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
1151
1152                 $comment = $match[0];
1153
1154                 # fix up urlencoded title texts (copied from Parser::replaceInternalLinks)
1155                 if ( strpos( $match[1], '%' ) !== false ) {
1156                         $match[1] = str_replace( array( '<', '>' ), array( '&lt;', '&gt;' ), rawurldecode( $match[1] ) );
1157                 }
1158
1159                 # Handle link renaming [[foo|text]] will show link as "text"
1160                 if ( $match[3] != "" ) {
1161                         $text = $match[3];
1162                 } else {
1163                         $text = $match[1];
1164                 }
1165                 $submatch = array();
1166                 $thelink = null;
1167                 if ( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
1168                         # Media link; trail not supported.
1169                         $linkRegexp = '/\[\[(.*?)\]\]/';
1170                         $title = Title::makeTitleSafe( NS_FILE, $submatch[1] );
1171                         $thelink = self::makeMediaLinkObj( $title, $text );
1172                 } else {
1173                         # Other kind of link
1174                         if ( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
1175                                 $trail = $submatch[1];
1176                         } else {
1177                                 $trail = "";
1178                         }
1179                         $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
1180                         if ( isset( $match[1][0] ) && $match[1][0] == ':' )
1181                                 $match[1] = substr( $match[1], 1 );
1182                         list( $inside, $trail ) = self::splitTrail( $trail );
1183
1184                         $linkText = $text;
1185                         $linkTarget = self::normalizeSubpageLink( self::$commentContextTitle,
1186                                 $match[1], $linkText );
1187
1188                         $target = Title::newFromText( $linkTarget );
1189                         if ( $target ) {
1190                                 if ( $target->getText() == '' && $target->getInterwiki() === ''
1191                                         && !self::$commentLocal && self::$commentContextTitle )
1192                                 {
1193                                         $newTarget = clone ( self::$commentContextTitle );
1194                                         $newTarget->setFragment( '#' . $target->getFragment() );
1195                                         $target = $newTarget;
1196                                 }
1197                                 $thelink = self::link(
1198                                         $target,
1199                                         $linkText . $inside
1200                                 ) . $trail;
1201                         }
1202                 }
1203                 if ( $thelink ) {
1204                         // If the link is still valid, go ahead and replace it in!
1205                         $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
1206                 }
1207
1208                 return $comment;
1209         }
1210
1211         /**
1212          * @param $contextTitle Title
1213          * @param  $target
1214          * @param  $text
1215          * @return string
1216          */
1217         static function normalizeSubpageLink( $contextTitle, $target, &$text ) {
1218                 # Valid link forms:
1219                 # Foobar -- normal
1220                 # :Foobar -- override special treatment of prefix (images, language links)
1221                 # /Foobar -- convert to CurrentPage/Foobar
1222                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1223                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1224                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1225
1226                 wfProfileIn( __METHOD__ );
1227                 $ret = $target; # default return value is no change
1228
1229                 # Some namespaces don't allow subpages,
1230                 # so only perform processing if subpages are allowed
1231                 if ( $contextTitle && MWNamespace::hasSubpages( $contextTitle->getNamespace() ) ) {
1232                         $hash = strpos( $target, '#' );
1233                         if ( $hash !== false ) {
1234                                 $suffix = substr( $target, $hash );
1235                                 $target = substr( $target, 0, $hash );
1236                         } else {
1237                                 $suffix = '';
1238                         }
1239                         # bug 7425
1240                         $target = trim( $target );
1241                         # Look at the first character
1242                         if ( $target != '' && $target { 0 } === '/' ) {
1243                                 # / at end means we don't want the slash to be shown
1244                                 $m = array();
1245                                 $trailingSlashes = preg_match_all( '%(/+)$%', $target, $m );
1246                                 if ( $trailingSlashes ) {
1247                                         $noslash = $target = substr( $target, 1, -strlen( $m[0][0] ) );
1248                                 } else {
1249                                         $noslash = substr( $target, 1 );
1250                                 }
1251
1252                                 $ret = $contextTitle->getPrefixedText() . '/' . trim( $noslash ) . $suffix;
1253                                 if ( $text === '' ) {
1254                                         $text = $target . $suffix;
1255                                 } # this might be changed for ugliness reasons
1256                         } else {
1257                                 # check for .. subpage backlinks
1258                                 $dotdotcount = 0;
1259                                 $nodotdot = $target;
1260                                 while ( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1261                                         ++$dotdotcount;
1262                                         $nodotdot = substr( $nodotdot, 3 );
1263                                 }
1264                                 if ( $dotdotcount > 0 ) {
1265                                         $exploded = explode( '/', $contextTitle->GetPrefixedText() );
1266                                         if ( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1267                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1268                                                 # / at the end means don't show full path
1269                                                 if ( substr( $nodotdot, -1, 1 ) === '/' ) {
1270                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1271                                                         if ( $text === '' ) {
1272                                                                 $text = $nodotdot . $suffix;
1273                                                         }
1274                                                 }
1275                                                 $nodotdot = trim( $nodotdot );
1276                                                 if ( $nodotdot != '' ) {
1277                                                         $ret .= '/' . $nodotdot;
1278                                                 }
1279                                                 $ret .= $suffix;
1280                                         }
1281                                 }
1282                         }
1283                 }
1284
1285                 wfProfileOut( __METHOD__ );
1286                 return $ret;
1287         }
1288
1289         /**
1290          * Wrap a comment in standard punctuation and formatting if
1291          * it's non-empty, otherwise return empty string.
1292          *
1293          * @param $comment String
1294          * @param $title Mixed: Title object (to generate link to section in autocomment) or null
1295          * @param $local Boolean: whether section links should refer to local page
1296          * @param $embraced Boolean: whether the formatted comment should be embraced with ()
1297          * @return string
1298          */
1299         static function commentBlock( $comment, $title = null, $local = false, $embraced = true ) {
1300                 // '*' used to be the comment inserted by the software way back
1301                 // in antiquity in case none was provided, here for backwards
1302                 // compatability, acc. to brion -ævar
1303                 if ( $comment == '' || $comment == '*' ) {
1304                         return '';
1305                 } else {
1306                         $formatted = self::formatComment( $comment, $title, $local );
1307                         if ( $embraced ) {
1308                                 $formatted = wfMessage( 'parentheses' )->rawParams( $formatted )->escaped();
1309                         }
1310                         return Html::rawElement( 'span', array( 'class' => 'comment' ), $formatted );
1311                 }
1312         }
1313
1314         /**
1315          * Wrap and format the given revision's comment block, if the current
1316          * user is allowed to view it.
1317          *
1318          * @param $rev Revision object
1319          * @param $local Boolean: whether section links should refer to local page
1320          * @param $isPublic Boolean: show only if all users can see it
1321          * @return String: HTML fragment
1322          */
1323         static function revComment( Revision $rev, $local = false, $isPublic = false ) {
1324                 if ( $rev->getRawComment() == "" ) {
1325                         return "";
1326                 }
1327                 if ( $rev->isDeleted( Revision::DELETED_COMMENT ) && $isPublic ) {
1328                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1329                 } else if ( $rev->userCan( Revision::DELETED_COMMENT ) ) {
1330                         $block = self::commentBlock( $rev->getComment( Revision::FOR_THIS_USER ),
1331                                 $rev->getTitle(), $local );
1332                 } else {
1333                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1334                 }
1335                 if ( $rev->isDeleted( Revision::DELETED_COMMENT ) ) {
1336                         return " <span class=\"history-deleted\">$block</span>";
1337                 }
1338                 return $block;
1339         }
1340
1341         public static function formatRevisionSize( $size ) {
1342                 if ( $size == 0 ) {
1343                         $stxt = wfMsgExt( 'historyempty', 'parsemag' );
1344                 } else {
1345                         global $wgLang;
1346                         $stxt = wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $size ) );
1347                         $stxt = "($stxt)";
1348                 }
1349                 $stxt = htmlspecialchars( $stxt );
1350                 return "<span class=\"history-size\">$stxt</span>";
1351         }
1352
1353         /**
1354          * Add another level to the Table of Contents
1355          */
1356         static function tocIndent() {
1357                 return "\n<ul>";
1358         }
1359
1360         /**
1361          * Finish one or more sublevels on the Table of Contents
1362          */
1363         static function tocUnindent( $level ) {
1364                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level > 0 ? $level : 0 );
1365         }
1366
1367         /**
1368          * parameter level defines if we are on an indentation level
1369          */
1370         static function tocLine( $anchor, $tocline, $tocnumber, $level, $sectionIndex = false ) {
1371                 $classes = "toclevel-$level";
1372                 if ( $sectionIndex !== false )
1373                         $classes .= " tocsection-$sectionIndex";
1374                 return "\n<li class=\"$classes\"><a href=\"#" .
1375                         $anchor . '"><span class="tocnumber">' .
1376                         $tocnumber . '</span> <span class="toctext">' .
1377                         $tocline . '</span></a>';
1378         }
1379
1380         /**
1381          * End a Table Of Contents line.
1382          * tocUnindent() will be used instead if we're ending a line below
1383          * the new level.
1384          */
1385         static function tocLineEnd() {
1386                 return "</li>\n";
1387         }
1388
1389         /**
1390          * Wraps the TOC in a table and provides the hide/collapse javascript.
1391          *
1392          * @param $toc String: html of the Table Of Contents
1393          * @param $lang mixed: Language code for the toc title
1394          * @return String: full html of the TOC
1395          */
1396         static function tocList( $toc, $lang = false ) {
1397                 $title = wfMsgExt( 'toc', array( 'language' => $lang, 'escape' ) );
1398                 return
1399                    '<table id="toc" class="toc"><tr><td>'
1400                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
1401                  . $toc
1402                  . "</ul>\n</td></tr></table>\n";
1403         }
1404
1405         /**
1406          * Generate a table of contents from a section tree
1407          * Currently unused.
1408          *
1409          * @param $tree Return value of ParserOutput::getSections()
1410          * @return String: HTML fragment
1411          */
1412         public static function generateTOC( $tree ) {
1413                 $toc = '';
1414                 $lastLevel = 0;
1415                 foreach ( $tree as $section ) {
1416                         if ( $section['toclevel'] > $lastLevel )
1417                                 $toc .= self::tocIndent();
1418                         else if ( $section['toclevel'] < $lastLevel )
1419                                 $toc .= self::tocUnindent(
1420                                         $lastLevel - $section['toclevel'] );
1421                         else
1422                                 $toc .= self::tocLineEnd();
1423
1424                         $toc .= self::tocLine( $section['anchor'],
1425                                 $section['line'], $section['number'],
1426                                 $section['toclevel'], $section['index'] );
1427                         $lastLevel = $section['toclevel'];
1428                 }
1429                 $toc .= self::tocLineEnd();
1430                 return self::tocList( $toc );
1431         }
1432
1433         /**
1434          * Create a headline for content
1435          *
1436          * @param $level Integer: the level of the headline (1-6)
1437          * @param $attribs String: any attributes for the headline, starting with
1438          *                 a space and ending with '>'
1439          *                 This *must* be at least '>' for no attribs
1440          * @param $anchor String: the anchor to give the headline (the bit after the #)
1441          * @param $text String: the text of the header
1442          * @param $link String: HTML to add for the section edit link
1443          * @param $legacyAnchor Mixed: a second, optional anchor to give for
1444          *   backward compatibility (false to omit)
1445          *
1446          * @return String: HTML headline
1447          */
1448         public static function makeHeadline( $level, $attribs, $anchor, $text, $link, $legacyAnchor = false ) {
1449                 $ret = "<h$level$attribs"
1450                         . $link
1451                         . " <span class=\"mw-headline\" id=\"$anchor\">$text</span>"
1452                         . "</h$level>";
1453                 if ( $legacyAnchor !== false ) {
1454                         $ret = "<div id=\"$legacyAnchor\"></div>$ret";
1455                 }
1456                 return $ret;
1457         }
1458
1459         /**
1460          * Split a link trail, return the "inside" portion and the remainder of the trail
1461          * as a two-element array
1462          */
1463         static function splitTrail( $trail ) {
1464                 global $wgContLang;
1465                 $regex = $wgContLang->linkTrail();
1466                 $inside = '';
1467                 if ( $trail !== '' ) {
1468                         $m = array();
1469                         if ( preg_match( $regex, $trail, $m ) ) {
1470                                 $inside = $m[1];
1471                                 $trail = $m[2];
1472                         }
1473                 }
1474                 return array( $inside, $trail );
1475         }
1476
1477         /**
1478          * Generate a rollback link for a given revision.  Currently it's the
1479          * caller's responsibility to ensure that the revision is the top one. If
1480          * it's not, of course, the user will get an error message.
1481          *
1482          * If the calling page is called with the parameter &bot=1, all rollback
1483          * links also get that parameter. It causes the edit itself and the rollback
1484          * to be marked as "bot" edits. Bot edits are hidden by default from recent
1485          * changes, so this allows sysops to combat a busy vandal without bothering
1486          * other users.
1487          *
1488          * @param $rev Revision object
1489          */
1490         static function generateRollback( $rev ) {
1491                 return '<span class="mw-rollback-link">['
1492                         . self::buildRollbackLink( $rev )
1493                         . ']</span>';
1494         }
1495
1496         /**
1497          * Build a raw rollback link, useful for collections of "tool" links
1498          *
1499          * @param $rev Revision object
1500          * @return String: HTML fragment
1501          */
1502         public static function buildRollbackLink( $rev ) {
1503                 global $wgRequest, $wgUser;
1504                 $title = $rev->getTitle();
1505                 $query = array(
1506                         'action' => 'rollback',
1507                         'from' => $rev->getUserText(),
1508                         'token' => $wgUser->editToken( array( $title->getPrefixedText(), $rev->getUserText() ) ),
1509                 );
1510                 if ( $wgRequest->getBool( 'bot' ) ) {
1511                         $query['bot'] = '1';
1512                         $query['hidediff'] = '1'; // bug 15999
1513                 }
1514                 return self::link(
1515                         $title,
1516                         wfMsgHtml( 'rollbacklink' ),
1517                         array( 'title' => wfMsg( 'tooltip-rollback' ) ),
1518                         $query,
1519                         array( 'known', 'noclasses' )
1520                 );
1521         }
1522
1523         /**
1524          * Returns HTML for the "templates used on this page" list.
1525          *
1526          * @param $templates Array of templates from Article::getUsedTemplate
1527          * or similar
1528          * @param $preview Boolean: whether this is for a preview
1529          * @param $section Boolean: whether this is for a section edit
1530          * @return String: HTML output
1531          */
1532         public static function formatTemplates( $templates, $preview = false, $section = false ) {
1533                 wfProfileIn( __METHOD__ );
1534
1535                 $outText = '';
1536                 if ( count( $templates ) > 0 ) {
1537                         # Do a batch existence check
1538                         $batch = new LinkBatch;
1539                         foreach ( $templates as $title ) {
1540                                 $batch->addObj( $title );
1541                         }
1542                         $batch->execute();
1543
1544                         # Construct the HTML
1545                         $outText = '<div class="mw-templatesUsedExplanation">';
1546                         if ( $preview ) {
1547                                 $outText .= wfMsgExt( 'templatesusedpreview', array( 'parse' ), count( $templates ) );
1548                         } elseif ( $section ) {
1549                                 $outText .= wfMsgExt( 'templatesusedsection', array( 'parse' ), count( $templates ) );
1550                         } else {
1551                                 $outText .= wfMsgExt( 'templatesused', array( 'parse' ), count( $templates ) );
1552                         }
1553                         $outText .= "</div><ul>\n";
1554
1555                         usort( $templates, array( 'Title', 'compare' ) );
1556                         foreach ( $templates as $titleObj ) {
1557                                 $r = $titleObj->getRestrictions( 'edit' );
1558                                 if ( in_array( 'sysop', $r ) ) {
1559                                         $protected = wfMsgExt( 'template-protected', array( 'parseinline' ) );
1560                                 } elseif ( in_array( 'autoconfirmed', $r ) ) {
1561                                         $protected = wfMsgExt( 'template-semiprotected', array( 'parseinline' ) );
1562                                 } else {
1563                                         $protected = '';
1564                                 }
1565                                 if ( $titleObj->quickUserCan( 'edit' ) ) {
1566                                         $editLink = self::link(
1567                                                 $titleObj,
1568                                                 wfMsg( 'editlink' ),
1569                                                 array(),
1570                                                 array( 'action' => 'edit' )
1571                                         );
1572                                 } else {
1573                                         $editLink = self::link(
1574                                                 $titleObj,
1575                                                 wfMsg( 'viewsourcelink' ),
1576                                                 array(),
1577                                                 array( 'action' => 'edit' )
1578                                         );
1579                                 }
1580                                 $outText .= '<li>' . self::link( $titleObj ) . ' (' . $editLink . ') ' . $protected . '</li>';
1581                         }
1582                         $outText .= '</ul>';
1583                 }
1584                 wfProfileOut( __METHOD__  );
1585                 return $outText;
1586         }
1587
1588         /**
1589          * Returns HTML for the "hidden categories on this page" list.
1590          *
1591          * @param $hiddencats Array of hidden categories from Article::getHiddenCategories
1592          * or similar
1593          * @return String: HTML output
1594          */
1595         public static function formatHiddenCategories( $hiddencats ) {
1596                 global $wgLang;
1597                 wfProfileIn( __METHOD__ );
1598
1599                 $outText = '';
1600                 if ( count( $hiddencats ) > 0 ) {
1601                         # Construct the HTML
1602                         $outText = '<div class="mw-hiddenCategoriesExplanation">';
1603                         $outText .= wfMsgExt( 'hiddencategories', array( 'parse' ), $wgLang->formatnum( count( $hiddencats ) ) );
1604                         $outText .= "</div><ul>\n";
1605
1606                         foreach ( $hiddencats as $titleObj ) {
1607                                 $outText .= '<li>' . self::link( $titleObj, null, array(), array(), 'known' ) . "</li>\n"; # If it's hidden, it must exist - no need to check with a LinkBatch
1608                         }
1609                         $outText .= '</ul>';
1610                 }
1611                 wfProfileOut( __METHOD__  );
1612                 return $outText;
1613         }
1614
1615         /**
1616          * Format a size in bytes for output, using an appropriate
1617          * unit (B, KB, MB or GB) according to the magnitude in question
1618          *
1619          * @param $size Size to format
1620          * @return String
1621          */
1622         public static function formatSize( $size ) {
1623                 global $wgLang;
1624                 return htmlspecialchars( $wgLang->formatSize( $size ) );
1625         }
1626
1627         /**
1628          * Given the id of an interface element, constructs the appropriate title
1629          * attribute from the system messages.  (Note, this is usually the id but
1630          * isn't always, because sometimes the accesskey needs to go on a different
1631          * element than the id, for reverse-compatibility, etc.)
1632          *
1633          * @param $name String: id of the element, minus prefixes.
1634          * @param $options Mixed: null or the string 'withaccess' to add an access-
1635          *   key hint
1636          * @return String: contents of the title attribute (which you must HTML-
1637          *   escape), or false for no title attribute
1638          */
1639         public static function titleAttrib( $name, $options = null ) {
1640                 wfProfileIn( __METHOD__ );
1641
1642                 $message = wfMessage( "tooltip-$name" );
1643
1644                 if ( !$message->exists() ) {
1645                         $tooltip = false;
1646                 } else {
1647                         $tooltip = $message->text();
1648                         # Compatibility: formerly some tooltips had [alt-.] hardcoded
1649                         $tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
1650                         # Message equal to '-' means suppress it.
1651                         if (  $tooltip == '-' ) {
1652                                 $tooltip = false;
1653                         }
1654                 }
1655
1656                 if ( $options == 'withaccess' ) {
1657                         $accesskey = self::accesskey( $name );
1658                         if ( $accesskey !== false ) {
1659                                 if ( $tooltip === false || $tooltip === '' ) {
1660                                         $tooltip = "[$accesskey]";
1661                                 } else {
1662                                         $tooltip .= " [$accesskey]";
1663                                 }
1664                         }
1665                 }
1666
1667                 wfProfileOut( __METHOD__ );
1668                 return $tooltip;
1669         }
1670
1671         static $accesskeycache;
1672
1673         /**
1674          * Given the id of an interface element, constructs the appropriate
1675          * accesskey attribute from the system messages.  (Note, this is usually
1676          * the id but isn't always, because sometimes the accesskey needs to go on
1677          * a different element than the id, for reverse-compatibility, etc.)
1678          *
1679          * @param $name String: id of the element, minus prefixes.
1680          * @return String: contents of the accesskey attribute (which you must HTML-
1681          *   escape), or false for no accesskey attribute
1682          */
1683         public static function accesskey( $name ) {
1684                 if ( isset( self::$accesskeycache[$name] ) ) {
1685                         return self::$accesskeycache[$name];
1686                 }
1687                 wfProfileIn( __METHOD__ );
1688
1689                 $message = wfMessage( "accesskey-$name" );
1690
1691                 if ( !$message->exists() ) {
1692                         $accesskey = false;
1693                 } else {
1694                         $accesskey = $message->plain();
1695                         if ( $accesskey === '' || $accesskey === '-' ) {
1696                                 # FIXME: Per standard MW behavior, a value of '-' means to suppress the
1697                                 # attribute, but this is broken for accesskey: that might be a useful
1698                                 # value.
1699                                 $accesskey = false;
1700                         }
1701                 }
1702
1703                 wfProfileOut( __METHOD__ );
1704                 return self::$accesskeycache[$name] = $accesskey;
1705         }
1706
1707         /**
1708          * Creates a (show/hide) link for deleting revisions/log entries
1709          *
1710          * @param $query Array: query parameters to be passed to link()
1711          * @param $restricted Boolean: set to true to use a <strong> instead of a <span>
1712          * @param $delete Boolean: set to true to use (show/hide) rather than (show)
1713          *
1714          * @return String: HTML <a> link to Special:Revisiondelete, wrapped in a
1715          * span to allow for customization of appearance with CSS
1716          */
1717         public static function revDeleteLink( $query = array(), $restricted = false, $delete = true ) {
1718                 $sp = SpecialPage::getTitleFor( 'Revisiondelete' );
1719                 $text = $delete ? wfMsgHtml( 'rev-delundel' ) : wfMsgHtml( 'rev-showdeleted' );
1720                 $tag = $restricted ? 'strong' : 'span';
1721                 $link = self::link( $sp, $text, array(), $query, array( 'known', 'noclasses' ) );
1722                 return Xml::tags( $tag, array( 'class' => 'mw-revdelundel-link' ), "($link)" );
1723         }
1724
1725         /**
1726          * Creates a dead (show/hide) link for deleting revisions/log entries
1727          *
1728          * @param $delete Boolean: set to true to use (show/hide) rather than (show)
1729          *
1730          * @return string HTML text wrapped in a span to allow for customization
1731          * of appearance with CSS
1732          */
1733         public static function revDeleteLinkDisabled( $delete = true ) {
1734                 $text = $delete ? wfMsgHtml( 'rev-delundel' ) : wfMsgHtml( 'rev-showdeleted' );
1735                 return Xml::tags( 'span', array( 'class' => 'mw-revdelundel-link' ), "($text)" );
1736         }
1737
1738         /* Deprecated methods */
1739
1740         /**
1741          * @deprecated since 1.16 Use link()
1742          *
1743          * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
1744          * it if you already have a title object handy. See makeLinkObj for further documentation.
1745          *
1746          * @param $title String: the text of the title
1747          * @param $text  String: link text
1748          * @param $query String: optional query part
1749          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1750          *                      be included in the link text. Other characters will be appended after
1751          *                      the end of the link.
1752          */
1753         static function makeLink( $title, $text = '', $query = '', $trail = '' ) {
1754                 wfProfileIn( __METHOD__ );
1755                 $nt = Title::newFromText( $title );
1756                 if ( $nt instanceof Title ) {
1757                         $result = self::makeLinkObj( $nt, $text, $query, $trail );
1758                 } else {
1759                         wfDebug( 'Invalid title passed to self::makeLink(): "' . $title . "\"\n" );
1760                         $result = $text == "" ? $title : $text;
1761                 }
1762
1763                 wfProfileOut( __METHOD__ );
1764                 return $result;
1765         }
1766
1767         /**
1768          * @deprecated since 1.16 Use link()
1769          *
1770          * This function is a shortcut to makeKnownLinkObj(Title::newFromText($title),...). Do not call
1771          * it if you already have a title object handy. See makeKnownLinkObj for further documentation.
1772          *
1773          * @param $title String: the text of the title
1774          * @param $text  String: link text
1775          * @param $query String: optional query part
1776          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1777          *                      be included in the link text. Other characters will be appended after
1778          *                      the end of the link.
1779          * @param $prefix String: Optional prefix
1780          * @param $aprops String: extra attributes to the a-element
1781          */
1782         static function makeKnownLink(
1783                 $title, $text = '', $query = '', $trail = '', $prefix = '', $aprops = ''
1784         ) {
1785                 $nt = Title::newFromText( $title );
1786                 if ( $nt instanceof Title ) {
1787                         return self::makeKnownLinkObj( $nt, $text, $query, $trail, $prefix , $aprops );
1788                 } else {
1789                         wfDebug( 'Invalid title passed to self::makeKnownLink(): "' . $title . "\"\n" );
1790                         return $text == '' ? $title : $text;
1791                 }
1792         }
1793
1794         /**
1795          * @deprecated since 1.16 Use link()
1796          *
1797          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
1798          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
1799          *
1800          * @param $title String: The text of the title
1801          * @param $text String: Link text
1802          * @param $query String: Optional query part
1803          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
1804          *               be included in the link text. Other characters will be appended after
1805          *               the end of the link.
1806          */
1807         static function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
1808                 $nt = Title::newFromText( $title );
1809                 if ( $nt instanceof Title ) {
1810                         return self::makeBrokenLinkObj( $nt, $text, $query, $trail );
1811                 } else {
1812                         wfDebug( 'Invalid title passed to self::makeBrokenLink(): "' . $title . "\"\n" );
1813                         return $text == '' ? $title : $text;
1814                 }
1815         }
1816
1817         /**
1818          * @deprecated since 1.16 Use link()
1819          *
1820          * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
1821          * it if you already have a title object handy. See makeStubLinkObj for further documentation.
1822          *
1823          * @param $title String: the text of the title
1824          * @param $text  String: link text
1825          * @param $query String: optional query part
1826          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1827          *                      be included in the link text. Other characters will be appended after
1828          *                      the end of the link.
1829          */
1830         static function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
1831                 wfDeprecated( __METHOD__ );
1832                 $nt = Title::newFromText( $title );
1833                 if ( $nt instanceof Title ) {
1834                         return self::makeStubLinkObj( $nt, $text, $query, $trail );
1835                 } else {
1836                         wfDebug( 'Invalid title passed to self::makeStubLink(): "' . $title . "\"\n" );
1837                         return $text == '' ? $title : $text;
1838                 }
1839         }
1840
1841         /**
1842          * @deprecated since 1.16 Use link()
1843          *
1844          * Make a link for a title which may or may not be in the database. If you need to
1845          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
1846          * call to this will result in a DB query.
1847          *
1848          * @param $nt     Title: the title object to make the link from, e.g. from
1849          *                      Title::newFromText.
1850          * @param $text  String: link text
1851          * @param $query String: optional query part
1852          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1853          *                      be included in the link text. Other characters will be appended after
1854          *                      the end of the link.
1855          * @param $prefix String: optional prefix. As trail, only before instead of after.
1856          */
1857         static function makeLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1858                 wfProfileIn( __METHOD__ );
1859                 $query = wfCgiToArray( $query );
1860                 list( $inside, $trail ) = self::splitTrail( $trail );
1861                 if ( $text === '' ) {
1862                         $text = self::linkText( $nt );
1863                 }
1864
1865                 $ret = self::link( $nt, "$prefix$text$inside", array(), $query ) . $trail;
1866
1867                 wfProfileOut( __METHOD__ );
1868                 return $ret;
1869         }
1870
1871         /**
1872          * @deprecated since 1.16 Use link()
1873          *
1874          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
1875          * it doesn't have to do a database query. It's also valid for interwiki titles and special
1876          * pages.
1877          *
1878          * @param $title  Title object of target page
1879          * @param $text   String: text to replace the title
1880          * @param $query  String: link target
1881          * @param $trail  String: text after link
1882          * @param $prefix String: text before link text
1883          * @param $aprops String: extra attributes to the a-element
1884          * @param $style  String: style to apply - if empty, use getInternalLinkAttributesObj instead
1885          * @return the a-element
1886          */
1887         static function makeKnownLinkObj(
1888                 $title, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = ''
1889         ) {
1890                 wfProfileIn( __METHOD__ );
1891
1892                 if ( $text == '' ) {
1893                         $text = self::linkText( $title );
1894                 }
1895                 $attribs = Sanitizer::mergeAttributes(
1896                         Sanitizer::decodeTagAttributes( $aprops ),
1897                         Sanitizer::decodeTagAttributes( $style )
1898                 );
1899                 $query = wfCgiToArray( $query );
1900                 list( $inside, $trail ) = self::splitTrail( $trail );
1901
1902                 $ret = self::link( $title, "$prefix$text$inside", $attribs, $query,
1903                         array( 'known', 'noclasses' ) ) . $trail;
1904
1905                 wfProfileOut( __METHOD__ );
1906                 return $ret;
1907         }
1908
1909         /**
1910          * @deprecated since 1.16 Use link()
1911          *
1912          * Make a red link to the edit page of a given title.
1913          *
1914          * @param $title Title object of the target page
1915          * @param $text  String: Link text
1916          * @param $query String: Optional query part
1917          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
1918          *                      be included in the link text. Other characters will be appended after
1919          *                      the end of the link.
1920          * @param $prefix String: Optional prefix
1921          */
1922         static function makeBrokenLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '' ) {
1923                 wfProfileIn( __METHOD__ );
1924
1925                 list( $inside, $trail ) = self::splitTrail( $trail );
1926                 if ( $text === '' ) {
1927                         $text = self::linkText( $title );
1928                 }
1929
1930                 $ret = self::link( $title, "$prefix$text$inside", array(),
1931                         wfCgiToArray( $query ), 'broken' ) . $trail;
1932
1933                 wfProfileOut( __METHOD__ );
1934                 return $ret;
1935         }
1936
1937         /**
1938          * @deprecated since 1.16 Use link()
1939          *
1940          * Make a brown link to a short article.
1941          *
1942          * @param $nt Title object of the target page
1943          * @param $text  String: link text
1944          * @param $query String: optional query part
1945          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1946          *                      be included in the link text. Other characters will be appended after
1947          *                      the end of the link.
1948          * @param $prefix String: Optional prefix
1949          */
1950         static function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1951                 return self::makeColouredLinkObj( $nt, 'stub', $text, $query, $trail, $prefix );
1952         }
1953
1954         /**
1955          * @deprecated since 1.16 Use link()
1956          *
1957          * Make a coloured link.
1958          *
1959          * @param $nt Title object of the target page
1960          * @param $colour Integer: colour of the link
1961          * @param $text   String:  link text
1962          * @param $query  String:  optional query part
1963          * @param $trail  String:  optional trail. Alphabetic characters at the start of this string will
1964          *                      be included in the link text. Other characters will be appended after
1965          *                      the end of the link.
1966          * @param $prefix String: Optional prefix
1967          */
1968         static function makeColouredLinkObj( $nt, $colour, $text = '', $query = '', $trail = '', $prefix = '' ) {
1969                 if ( $colour != '' ) {
1970                         $style = self::getInternalLinkAttributesObj( $nt, $text, $colour );
1971                 } else {
1972                         $style = '';
1973                 }
1974                 return self::makeKnownLinkObj( $nt, $text, $query, $trail, $prefix, '', $style );
1975         }
1976
1977         /**
1978          * Creates the HTML source for images
1979          * @deprecated since 1.16 use makeImageLink2
1980          *
1981          * @param $title Title object
1982          * @param $label String: label text
1983          * @param $alt String: alt text
1984          * @param $align String: horizontal alignment: none, left, center, right)
1985          * @param $handlerParams Array: parameters to be passed to the media handler
1986          * @param $framed Boolean: shows image in original size in a frame
1987          * @param $thumb Boolean: shows image as thumbnail in a frame
1988          * @param $manualthumb String: image name for the manual thumbnail
1989          * @param $valign String: vertical alignment: baseline, sub, super, top, text-top, middle, bottom, text-bottom
1990          * @param $time String: timestamp of the file, set as false for current
1991          * @return String
1992          */
1993         static function makeImageLinkObj( $title, $label, $alt, $align = '', $handlerParams = array(),
1994                 $framed = false, $thumb = false, $manualthumb = '', $valign = '', $time = false )
1995         {
1996                 $frameParams = array( 'alt' => $alt, 'caption' => $label );
1997                 if ( $align ) {
1998                         $frameParams['align'] = $align;
1999                 }
2000                 if ( $framed ) {
2001                         $frameParams['framed'] = true;
2002                 }
2003                 if ( $thumb ) {
2004                         $frameParams['thumbnail'] = true;
2005                 }
2006                 if ( $manualthumb ) {
2007                         $frameParams['manualthumb'] = $manualthumb;
2008                 }
2009                 if ( $valign ) {
2010                         $frameParams['valign'] = $valign;
2011                 }
2012                 $file = wfFindFile( $title, array( 'time' => $time ) );
2013                 return self::makeImageLink2( $title, $file, $frameParams, $handlerParams, $time );
2014         }
2015
2016         /** @deprecated use Linker::makeMediaLinkObj() */
2017         static function makeMediaLink( $name, $unused = '', $text = '', $time = false ) {
2018                 $nt = Title::makeTitleSafe( NS_FILE, $name );
2019                 return self::makeMediaLinkObj( $nt, $text, $time );
2020         }
2021
2022         /**
2023          * Returns the attributes for the tooltip and access key.
2024          */
2025         public static function tooltipAndAccesskeyAttribs( $name ) {
2026                 global $wgEnableTooltipsAndAccesskeys;
2027                 if ( !$wgEnableTooltipsAndAccesskeys )
2028                         return array();
2029                 # FIXME: If Sanitizer::expandAttributes() treated "false" as "output
2030                 # no attribute" instead of "output '' as value for attribute", this
2031                 # would be three lines.
2032                 $attribs = array(
2033                         'title' => self::titleAttrib( $name, 'withaccess' ),
2034                         'accesskey' => self::accesskey( $name )
2035                 );
2036                 if ( $attribs['title'] === false ) {
2037                         unset( $attribs['title'] );
2038                 }
2039                 if ( $attribs['accesskey'] === false ) {
2040                         unset( $attribs['accesskey'] );
2041                 }
2042                 return $attribs;
2043         }
2044
2045         /**
2046          * @deprecated since 1.14
2047          * Returns raw bits of HTML, use titleAttrib() and accesskey()
2048          */
2049         public static function tooltipAndAccesskey( $name ) {
2050                 return Xml::expandAttributes( self::tooltipAndAccesskeyAttribs( $name ) );
2051         }
2052
2053         /**
2054          * @deprecated since 1.14
2055          * Returns raw bits of HTML, use titleAttrib()
2056          */
2057         public static function tooltip( $name, $options = null ) {
2058                 global $wgEnableTooltipsAndAccesskeys;
2059                 if ( !$wgEnableTooltipsAndAccesskeys )
2060                         return '';
2061                 # FIXME: If Sanitizer::expandAttributes() treated "false" as "output
2062                 # no attribute" instead of "output '' as value for attribute", this
2063                 # would be two lines.
2064                 $tooltip = self::titleAttrib( $name, $options );
2065                 if ( $tooltip === false ) {
2066                         return '';
2067                 }
2068                 return Xml::expandAttributes( array(
2069                         'title' => self::titleAttrib( $name, $options )
2070                 ) );
2071         }
2072 }
2073
2074 class DummyLinker {
2075
2076         /**
2077          * Use PHP's magic __call handler to transform instance calls to a dummy instance
2078          * into static calls to the new Linker for backwards compatibility.
2079          *
2080          * @param $fname String Name of called method
2081          * @param $args Array Arguments to the method
2082          */
2083         function __call( $fname, $args ) {
2084                 return call_user_func_array( array( 'Linker', $fname ), $args );
2085         }
2086
2087 }
2088