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 since 1.18 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                 # @todo 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          * @param $title string
  87          * @param $class string
  88          *
  89          * @return string
  90          */
  91         private static function getLinkAttributesInternal( $title, $class ) {
  92                 $title = htmlspecialchars( $title );
  93                 $class = htmlspecialchars( $class );
  94                 $r = '';
  95                 if ( $class != '' ) {
  96                         $r .= " class=\"$class\"";
  97                 }
  98                 if ( $title != '' ) {
  99                         $r .= " title=\"$title\"";
 100                 }
 101                 return $r;
 102         }
 103
 104         /**
 105          * Return the CSS colour of a known link
 106          *
 107          * @param $t Title object
 108          * @param $threshold Integer: user defined threshold
 109          * @return String: CSS class
 110          */
 111         static function getLinkColour( $t, $threshold ) {
 112                 $colour = '';
 113                 if ( $t->isRedirect() ) {
 114                         # Page is a redirect
 115                         $colour = 'mw-redirect';
 116                 } elseif ( $threshold > 0 &&
 117                            $t->exists() && $t->getLength() < $threshold &&
 118                            $t->isContentPage() ) {
 119                         # Page is a stub
 120                         $colour = 'stub';
 121                 }
 122                 return $colour;
 123         }
 124
 125         /**
 126          * This function returns an HTML link to the given target.  It serves a few
 127          * purposes:
 128          *   1) If $target is a Title, the correct URL to link to will be figured
 129          *      out automatically.
 130          *   2) It automatically adds the usual classes for various types of link
 131          *      targets: "new" for red links, "stub" for short articles, etc.
 132          *   3) It escapes all attribute values safely so there's no risk of XSS.
 133          *   4) It provides a default tooltip if the target is a Title (the page
 134          *      name of the target).
 135          * link() replaces the old functions in the makeLink() family.
 136          *
 137          * @param $target        Title  Can currently only be a Title, but this may
 138          *   change to support Images, literal URLs, etc.
 139          * @param $text          string The HTML contents of the <a> element, i.e.,
 140          *   the link text.  This is raw HTML and will not be escaped.  If null,
 141          *   defaults to the prefixed text of the Title; or if the Title is just a
 142          *   fragment, the contents of the fragment.
 143          * @param $customAttribs array  A key => value array of extra HTML attri-
 144          *   butes, such as title and class.  (href is ignored.)  Classes will be
 145          *   merged with the default classes, while other attributes will replace
 146          *   default attributes.  All passed attribute values will be HTML-escaped.
 147          *   A false attribute value means to suppress that attribute.
 148          * @param $query         array  The query string to append to the URL
 149          *   you're linking to, in key => value array form.  Query keys and values
 150          *   will be URL-encoded.
 151          * @param $options string|array  String or array of strings:
 152          *     'known': Page is known to exist, so don't check if it does.
 153          *     'broken': Page is known not to exist, so don't check if it does.
 154          *     'noclasses': Don't add any classes automatically (includes "new",
 155          *       "stub", "mw-redirect", "extiw").  Only use the class attribute
 156          *       provided, if any, so you get a simple blue link with no funny i-
 157          *       cons.
 158          *     'forcearticlepath': Use the article path always, even with a querystring.
 159          *       Has compatibility issues on some setups, so avoid wherever possible.
 160          * @return string HTML <a> attribute
 161          */
 162         public static function link(
 163                 $target, $html = null, $customAttribs = array(), $query = array(), $options = array()
 164         ) {
 165                 wfProfileIn( __METHOD__ );
 166                 if ( !$target instanceof Title ) {
 167                         wfProfileOut( __METHOD__ );
 168                         return "<!-- ERROR -->$html";
 169                 }
 170                 $options = (array)$options;
 171
 172                 $dummy = new DummyLinker; // dummy linker instance for bc on the hooks
 173
 174                 $ret = null;
 175                 if ( !wfRunHooks( 'LinkBegin', array( $dummy, $target, &$html,
 176                 &$customAttribs, &$query, &$options, &$ret ) ) ) {
 177                         wfProfileOut( __METHOD__ );
 178                         return $ret;
 179                 }
 180
 181                 # Normalize the Title if it's a special page
 182                 $target = self::normaliseSpecialPage( $target );
 183
 184                 # If we don't know whether the page exists, let's find out.
 185                 wfProfileIn( __METHOD__ . '-checkPageExistence' );
 186                 if ( !in_array( 'known', $options ) and !in_array( 'broken', $options ) ) {
 187                         if ( $target->isKnown() ) {
 188                                 $options[] = 'known';
 189                         } else {
 190                                 $options[] = 'broken';
 191                         }
 192                 }
 193                 wfProfileOut( __METHOD__ . '-checkPageExistence' );
 194
 195                 $oldquery = array();
 196                 if ( in_array( "forcearticlepath", $options ) && $query ) {
 197                         $oldquery = $query;
 198                         $query = array();
 199                 }
 200
 201                 # Note: we want the href attribute first, for prettiness.
 202                 $attribs = array( 'href' => self::linkUrl( $target, $query, $options ) );
 203                 if ( in_array( 'forcearticlepath', $options ) && $oldquery ) {
 204                         $attribs['href'] = wfAppendQuery( $attribs['href'], wfArrayToCgi( $oldquery ) );
 205                 }
 206
 207                 $attribs = array_merge(
 208                         $attribs,
 209                         self::linkAttribs( $target, $customAttribs, $options )
 210                 );
 211                 if ( is_null( $html ) ) {
 212                         $html = self::linkText( $target );
 213                 }
 214
 215                 $ret = null;
 216                 if ( wfRunHooks( 'LinkEnd', array( $dummy, $target, $options, &$html, &$attribs, &$ret ) ) ) {
 217                         $ret = Html::rawElement( 'a', $attribs, $html );
 218                 }
 219
 220                 wfProfileOut( __METHOD__ );
 221                 return $ret;
 222         }
 223
 224         /**
 225          * Identical to link(), except $options defaults to 'known'.
 226          */
 227         public static function linkKnown(
 228                 $target, $text = null, $customAttribs = array(),
 229                 $query = array(), $options = array( 'known', 'noclasses' ) )
 230         {
 231                 return self::link( $target, $text, $customAttribs, $query, $options );
 232         }
 233
 234         /**
 235          * Returns the Url used to link to a Title
 236          *
 237          * @param $target Title
 238          */
 239         private static function linkUrl( $target, $query, $options ) {
 240                 wfProfileIn( __METHOD__ );
 241                 # We don't want to include fragments for broken links, because they
 242                 # generally make no sense.
 243                 if ( in_array( 'broken', $options ) && $target->mFragment !== '' ) {
 244                         $target = clone $target;
 245                         $target->mFragment = '';
 246                 }
 247
 248                 # If it's a broken link, add the appropriate query pieces, unless
 249                 # there's already an action specified, or unless 'edit' makes no sense
 250                 # (i.e., for a nonexistent special page).
 251                 if ( in_array( 'broken', $options ) && empty( $query['action'] )
 252                         && $target->getNamespace() != NS_SPECIAL ) {
 253                         $query['action'] = 'edit';
 254                         $query['redlink'] = '1';
 255                 }
 256                 $ret = $target->getLinkUrl( $query );
 257                 wfProfileOut( __METHOD__ );
 258                 return $ret;
 259         }
 260
 261         /**
 262          * Returns the array of attributes used when linking to the Title $target
 263          *
 264          * @param $target Title
 265          */
 266         private static function linkAttribs( $target, $attribs, $options ) {
 267                 wfProfileIn( __METHOD__ );
 268                 global $wgUser;
 269                 $defaults = array();
 270
 271                 if ( !in_array( 'noclasses', $options ) ) {
 272                         wfProfileIn( __METHOD__ . '-getClasses' );
 273                         # Now build the classes.
 274                         $classes = array();
 275
 276                         if ( in_array( 'broken', $options ) ) {
 277                                 $classes[] = 'new';
 278                         }
 279
 280                         if ( $target->isExternal() ) {
 281                                 $classes[] = 'extiw';
 282                         }
 283
 284                         if ( !in_array( 'broken', $options ) ) { # Avoid useless calls to LinkCache (see r50387)
 285                                 $colour = self::getLinkColour( $target, $wgUser->getStubThreshold() );
 286                                 if ( $colour !== '' ) {
 287                                         $classes[] = $colour; # mw-redirect or stub
 288                                 }
 289                         }
 290                         if ( $classes != array() ) {
 291                                 $defaults['class'] = implode( ' ', $classes );
 292                         }
 293                         wfProfileOut( __METHOD__ . '-getClasses' );
 294                 }
 295
 296                 # Get a default title attribute.
 297                 if ( $target->getPrefixedText() == '' ) {
 298                         # A link like [[#Foo]].  This used to mean an empty title
 299                         # attribute, but that's silly.  Just don't output a title.
 300                 } elseif ( in_array( 'known', $options ) ) {
 301                         $defaults['title'] = $target->getPrefixedText();
 302                 } else {
 303                         $defaults['title'] = wfMsg( 'red-link-title', $target->getPrefixedText() );
 304                 }
 305
 306                 # Finally, merge the custom attribs with the default ones, and iterate
 307                 # over that, deleting all "false" attributes.
 308                 $ret = array();
 309                 $merged = Sanitizer::mergeAttributes( $defaults, $attribs );
 310                 foreach ( $merged as $key => $val ) {
 311                         # A false value suppresses the attribute, and we don't want the
 312                         # href attribute to be overridden.
 313                         if ( $key != 'href' and $val !== false ) {
 314                                 $ret[$key] = $val;
 315                         }
 316                 }
 317                 wfProfileOut( __METHOD__ );
 318                 return $ret;
 319         }
 320
 321         /**
 322          * Default text of the links to the Title $target
 323          *
 324          * @param $target Title
 325          *
 326          * @return string
 327          */
 328         private static function linkText( $target ) {
 329                 # We might be passed a non-Title by make*LinkObj().  Fail gracefully.
 330                 if ( !$target instanceof Title ) {
 331                         return '';
 332                 }
 333
 334                 # If the target is just a fragment, with no title, we return the frag-
 335                 # ment text.  Otherwise, we return the title text itself.
 336                 if ( $target->getPrefixedText() === '' && $target->getFragment() !== '' ) {
 337                         return htmlspecialchars( $target->getFragment() );
 338                 }
 339                 return htmlspecialchars( $target->getPrefixedText() );
 340         }
 341
 342         /**
 343          * Generate either a normal exists-style link or a stub link, depending
 344          * on the given page size.
 345          *
 346          * @param $size Integer
 347          * @param $nt Title object.
 348          * @param $text String
 349          * @param $query String
 350          * @param $trail String
 351          * @param $prefix String
 352          * @return string HTML of link
 353          * @deprecated since 1.17
 354          */
 355         static function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 356                 global $wgUser;
 357                 wfDeprecated( __METHOD__ );
 358
 359                 $threshold = $wgUser->getStubThreshold();
 360                 $colour = ( $size < $threshold ) ? 'stub' : '';
 361                 // @todo FIXME: Replace deprecated makeColouredLinkObj by link()
 362                 return self::makeColouredLinkObj( $nt, $colour, $text, $query, $trail, $prefix );
 363         }
 364
 365         /**
 366          * Make appropriate markup for a link to the current article. This is currently rendered
 367          * as the bold link text. The calling sequence is the same as the other make*LinkObj static functions,
 368          * despite $query not being used.
 369          *
 370          * @param $nt Title
 371          *
 372          * @return string
 373          */
 374         static function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 375                 if ( $text == '' ) {
 376                         $text = htmlspecialchars( $nt->getPrefixedText() );
 377                 }
 378                 list( $inside, $trail ) = self::splitTrail( $trail );
 379                 return "<strong class=\"selflink\">{$prefix}{$text}{$inside}</strong>{$trail}";
 380         }
 381
 382         /**
 383          * @param $title Title
 384          * @return Title
 385          */
 386         static function normaliseSpecialPage( Title $title ) {
 387                 if ( $title->getNamespace() == NS_SPECIAL ) {
 388                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 389                         if ( !$name ) {
 390                                 return $title;
 391                         }
 392                         $ret = SpecialPage::getTitleFor( $name, $subpage );
 393                         $ret->mFragment = $title->getFragment();
 394                         return $ret;
 395                 } else {
 396                         return $title;
 397                 }
 398         }
 399
 400         /**
 401          * Returns the filename part of an url.
 402          * Used as alternative text for external images.
 403          *
 404          * @param $url string
 405          *
 406          * @return string
 407          */
 408         static function fnamePart( $url ) {
 409                 $basename = strrchr( $url, '/' );
 410                 if ( false === $basename ) {
 411                         $basename = $url;
 412                 } else {
 413                         $basename = substr( $basename, 1 );
 414                 }
 415                 return $basename;
 416         }
 417
 418         /**
 419          * Return the code for images which were added via external links,
 420          * via Parser::maybeMakeExternalImage().
 421          *
 422          * @param $url
 423          * @param $alt
 424          *
 425          * @return string
 426          */
 427         static function makeExternalImage( $url, $alt = '' ) {
 428                 if ( $alt == '' ) {
 429                         $alt = self::fnamePart( $url );
 430                 }
 431                 $img = '';
 432                 $success = wfRunHooks( 'LinkerMakeExternalImage', array( &$url, &$alt, &$img ) );
 433                 if ( !$success ) {
 434                         wfDebug( "Hook LinkerMakeExternalImage changed the output of external image with url {$url} and alt text {$alt} to {$img}\n", true );
 435                         return $img;
 436                 }
 437                 return Html::element( 'img',
 438                         array(
 439                                 'src' => $url,
 440                                 'alt' => $alt ) );
 441         }
 442
 443         /**
 444          * Given parameters derived from [[Image:Foo|options...]], generate the
 445          * HTML that that syntax inserts in the page.
 446          *
 447          * @param $title Title object
 448          * @param $file File object, or false if it doesn't exist
 449          * @param $frameParams Array: associative array of parameters external to the media handler.
 450          *     Boolean parameters are indicated by presence or absence, the value is arbitrary and
 451          *     will often be false.
 452          *          thumbnail       If present, downscale and frame
 453          *          manualthumb     Image name to use as a thumbnail, instead of automatic scaling
 454          *          framed          Shows image in original size in a frame
 455          *          frameless       Downscale but don't frame
 456          *          upright         If present, tweak default sizes for portrait orientation
 457          *          upright_factor  Fudge factor for "upright" tweak (default 0.75)
 458          *          border          If present, show a border around the image
 459          *          align           Horizontal alignment (left, right, center, none)
 460          *          valign          Vertical alignment (baseline, sub, super, top, text-top, middle,
 461          *                          bottom, text-bottom)
 462          *          alt             Alternate text for image (i.e. alt attribute). Plain text.
 463          *          caption         HTML for image caption.
 464          *          link-url        URL to link to
 465          *          link-title      Title object to link to
 466          *          link-target     Value for the target attribue, only with link-url
 467          *          no-link         Boolean, suppress description link
 468          *
 469          * @param $handlerParams Array: associative array of media handler parameters, to be passed
 470          *       to transform(). Typical keys are "width" and "page".
 471          * @param $time String: timestamp of the file, set as false for current
 472          * @param $query String: query params for desc url
 473          * @param $widthOption: Used by the parser to remember the user preference thumbnailsize
 474          * @return String: HTML for an image, with links, wrappers, etc.
 475          */
 476         static function makeImageLink2( Title $title, $file, $frameParams = array(),
 477                 $handlerParams = array(), $time = false, $query = "", $widthOption = null )
 478         {
 479                 $res = null;
 480                 $dummy = new DummyLinker;
 481                 if ( !wfRunHooks( 'ImageBeforeProduceHTML', array( &$dummy, &$title,
 482                         &$file, &$frameParams, &$handlerParams, &$time, &$res ) ) ) {
 483                         return $res;
 484                 }
 485
 486                 if ( $file && !$file->allowInlineDisplay() ) {
 487                         wfDebug( __METHOD__ . ': ' . $title->getPrefixedDBkey() . " does not allow inline display\n" );
 488                         return self::link( $title );
 489                 }
 490
 491                 // Shortcuts
 492                 $fp =& $frameParams;
 493                 $hp =& $handlerParams;
 494
 495                 // Clean up parameters
 496                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 497                 if ( !isset( $fp['align'] ) ) {
 498                         $fp['align'] = '';
 499                 }
 500                 if ( !isset( $fp['alt'] ) ) {
 501                         $fp['alt'] = '';
 502                 }
 503                 if ( !isset( $fp['title'] ) ) {
 504                         $fp['title'] = '';
 505                 }
 506
 507                 $prefix = $postfix = '';
 508
 509                 if ( 'center' == $fp['align'] ) {
 510                         $prefix  = '<div class="center">';
 511                         $postfix = '</div>';
 512                         $fp['align']   = 'none';
 513                 }
 514                 if ( $file && !isset( $hp['width'] ) ) {
 515                         if ( isset( $hp['height'] ) && $file->isVectorized() ) {
 516                                 // If its a vector image, and user only specifies height
 517                                 // we don't want it to be limited by its "normal" width.
 518                                 global $wgSVGMaxSize;
 519                                 $hp['width'] = $wgSVGMaxSize;
 520                         } else {
 521                                 $hp['width'] = $file->getWidth( $page );
 522                         }
 523
 524                         if ( isset( $fp['thumbnail'] ) || isset( $fp['framed'] ) || isset( $fp['frameless'] ) || !$hp['width'] ) {
 525                                 global $wgThumbLimits, $wgThumbUpright;
 526                                 if ( !isset( $widthOption ) || !isset( $wgThumbLimits[$widthOption] ) ) {
 527                                         $widthOption = User::getDefaultOption( 'thumbsize' );
 528                                 }
 529
 530                                 // Reduce width for upright images when parameter 'upright' is used
 531                                 if ( isset( $fp['upright'] ) && $fp['upright'] == 0 ) {
 532                                         $fp['upright'] = $wgThumbUpright;
 533                                 }
 534                                 // 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
 535                                 $prefWidth = isset( $fp['upright'] ) ?
 536                                         round( $wgThumbLimits[$widthOption] * $fp['upright'], -1 ) :
 537                                         $wgThumbLimits[$widthOption];
 538
 539                                 // Use width which is smaller: real image width or user preference width
 540                                 // Unless image is scalable vector.
 541                                 if ( !isset( $hp['height'] ) && ( $hp['width'] <= 0 ||
 542                                                 $prefWidth < $hp['width'] || $file->isVectorized() ) ) {
 543                                         $hp['width'] = $prefWidth;
 544                                 }
 545                         }
 546                 }
 547
 548                 if ( isset( $fp['thumbnail'] ) || isset( $fp['manualthumb'] ) || isset( $fp['framed'] ) ) {
 549                         global $wgContLang;
 550                         # Create a thumbnail. Alignment depends on language
 551                         # writing direction, # right aligned for left-to-right-
 552                         # languages ("Western languages"), left-aligned
 553                         # for right-to-left-languages ("Semitic languages")
 554                         #
 555                         # If  thumbnail width has not been provided, it is set
 556                         # to the default user option as specified in Language*.php
 557                         if ( $fp['align'] == '' ) {
 558                                 $fp['align'] = $wgContLang->alignEnd();
 559                         }
 560                         return $prefix . self::makeThumbLink2( $title, $file, $fp, $hp, $time, $query ) . $postfix;
 561                 }
 562
 563                 if ( $file && isset( $fp['frameless'] ) ) {
 564                         $srcWidth = $file->getWidth( $page );
 565                         # For "frameless" option: do not present an image bigger than the source (for bitmap-style images)
 566                         # This is the same behaviour as the "thumb" option does it already.
 567                         if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 568                                 $hp['width'] = $srcWidth;
 569                         }
 570                 }
 571
 572                 if ( $file && isset( $hp['width'] ) ) {
 573                         # Create a resized image, without the additional thumbnail features
 574                         $thumb = $file->transform( $hp );
 575                 } else {
 576                         $thumb = false;
 577                 }
 578
 579                 if ( !$thumb ) {
 580                         $s = self::makeBrokenImageLinkObj( $title, $fp['title'], '', '', '', $time == true );
 581                 } else {
 582                         $params = array(
 583                                 'alt' => $fp['alt'],
 584                                 'title' => $fp['title'],
 585                                 'valign' => isset( $fp['valign'] ) ? $fp['valign'] : false ,
 586                                 'img-class' => isset( $fp['border'] ) ? 'thumbborder' : false );
 587                         $params = self::getImageLinkMTOParams( $fp, $query ) + $params;
 588
 589                         $s = $thumb->toHtml( $params );
 590                 }
 591                 if ( $fp['align'] != '' ) {
 592                         $s = "<div class=\"float{$fp['align']}\">{$s}</div>";
 593                 }
 594                 return str_replace( "\n", ' ', $prefix . $s . $postfix );
 595         }
 596
 597         /**
 598          * Get the link parameters for MediaTransformOutput::toHtml() from given
 599          * frame parameters supplied by the Parser.
 600          * @param $frameParams The frame parameters
 601          * @param $query An optional query string to add to description page links
 602          */
 603         static function getImageLinkMTOParams( $frameParams, $query = '' ) {
 604                 $mtoParams = array();
 605                 if ( isset( $frameParams['link-url'] ) && $frameParams['link-url'] !== '' ) {
 606                         $mtoParams['custom-url-link'] = $frameParams['link-url'];
 607                         if ( isset( $frameParams['link-target'] ) ) {
 608                                 $mtoParams['custom-target-link'] = $frameParams['link-target'];
 609                         }
 610                 } elseif ( isset( $frameParams['link-title'] ) && $frameParams['link-title'] !== '' ) {
 611                         $mtoParams['custom-title-link'] = self::normaliseSpecialPage( $frameParams['link-title'] );
 612                 } elseif ( !empty( $frameParams['no-link'] ) ) {
 613                         // No link
 614                 } else {
 615                         $mtoParams['desc-link'] = true;
 616                         $mtoParams['desc-query'] = $query;
 617                 }
 618                 return $mtoParams;
 619         }
 620
 621         /**
 622          * Make HTML for a thumbnail including image, border and caption
 623          * @param $title Title object
 624          * @param $file File object or false if it doesn't exist
 625          * @param $label String
 626          * @param $alt String
 627          * @param $align String
 628          * @param $params Array
 629          * @param $framed Boolean
 630          * @param $manualthumb String
 631          */
 632         static function makeThumbLinkObj( Title $title, $file, $label = '', $alt,
 633                 $align = 'right', $params = array(), $framed = false , $manualthumb = "" )
 634         {
 635                 $frameParams = array(
 636                         'alt' => $alt,
 637                         'caption' => $label,
 638                         'align' => $align
 639                 );
 640                 if ( $framed ) {
 641                         $frameParams['framed'] = true;
 642                 }
 643                 if ( $manualthumb ) {
 644                         $frameParams['manualthumb'] = $manualthumb;
 645                 }
 646                 return self::makeThumbLink2( $title, $file, $frameParams, $params );
 647         }
 648
 649         /**
 650          * @param $title Title
 651          * @param  $file File
 652          * @param array $frameParams
 653          * @param array $handlerParams
 654          * @param bool $time
 655          * @param string $query
 656          * @return mixed
 657          */
 658         static function makeThumbLink2( Title $title, $file, $frameParams = array(),
 659                 $handlerParams = array(), $time = false, $query = "" )
 660         {
 661                 global $wgStylePath, $wgContLang;
 662                 $exists = $file && $file->exists();
 663
 664                 # Shortcuts
 665                 $fp =& $frameParams;
 666                 $hp =& $handlerParams;
 667
 668                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 669                 if ( !isset( $fp['align'] ) ) $fp['align'] = 'right';
 670                 if ( !isset( $fp['alt'] ) ) $fp['alt'] = '';
 671                 if ( !isset( $fp['title'] ) ) $fp['title'] = '';
 672                 if ( !isset( $fp['caption'] ) ) $fp['caption'] = '';
 673
 674                 if ( empty( $hp['width'] ) ) {
 675                         // Reduce width for upright images when parameter 'upright' is used
 676                         $hp['width'] = isset( $fp['upright'] ) ? 130 : 180;
 677                 }
 678                 $thumb = false;
 679
 680                 if ( !$exists ) {
 681                         $outerWidth = $hp['width'] + 2;
 682                 } else {
 683                         if ( isset( $fp['manualthumb'] ) ) {
 684                                 # Use manually specified thumbnail
 685                                 $manual_title = Title::makeTitleSafe( NS_FILE, $fp['manualthumb'] );
 686                                 if ( $manual_title ) {
 687                                         $manual_img = wfFindFile( $manual_title );
 688                                         if ( $manual_img ) {
 689                                                 $thumb = $manual_img->getUnscaledThumb( $hp );
 690                                         } else {
 691                                                 $exists = false;
 692                                         }
 693                                 }
 694                         } elseif ( isset( $fp['framed'] ) ) {
 695                                 // Use image dimensions, don't scale
 696                                 $thumb = $file->getUnscaledThumb( $hp );
 697                         } else {
 698                                 # Do not present an image bigger than the source, for bitmap-style images
 699                                 # This is a hack to maintain compatibility with arbitrary pre-1.10 behaviour
 700                                 $srcWidth = $file->getWidth( $page );
 701                                 if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 702                                         $hp['width'] = $srcWidth;
 703                                 }
 704                                 $thumb = $file->transform( $hp );
 705                         }
 706
 707                         if ( $thumb ) {
 708                                 $outerWidth = $thumb->getWidth() + 2;
 709                         } else {
 710                                 $outerWidth = $hp['width'] + 2;
 711                         }
 712                 }
 713
 714                 # ThumbnailImage::toHtml() already adds page= onto the end of DjVu URLs
 715                 # So we don't need to pass it here in $query. However, the URL for the
 716                 # zoom icon still needs it, so we make a unique query for it. See bug 14771
 717                 $url = $title->getLocalURL( $query );
 718                 if ( $page ) {
 719                         $url = wfAppendQuery( $url, 'page=' . urlencode( $page ) );
 720                 }
 721
 722                 $s = "<div class=\"thumb t{$fp['align']}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
 723                 if ( !$exists ) {
 724                         $s .= self::makeBrokenImageLinkObj( $title, $fp['title'], '', '', '', $time == true );
 725                         $zoomIcon = '';
 726                 } elseif ( !$thumb ) {
 727                         $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
 728                         $zoomIcon = '';
 729                 } else {
 730                         $params = array(
 731                                 'alt' => $fp['alt'],
 732                                 'title' => $fp['title'],
 733                                 'img-class' => 'thumbimage' );
 734                         $params = self::getImageLinkMTOParams( $fp, $query ) + $params;
 735                         $s .= $thumb->toHtml( $params );
 736                         if ( isset( $fp['framed'] ) ) {
 737                                 $zoomIcon = "";
 738                         } else {
 739                                 $zoomIcon = Html::rawElement( 'div', array( 'class' => 'magnify' ),
 740                                         Html::rawElement( 'a', array(
 741                                                 'href' => $url,
 742                                                 'class' => 'internal',
 743                                                 'title' => wfMsg( 'thumbnail-more' ) ),
 744                                                 Html::element( 'img', array(
 745                                                         'src' => $wgStylePath . '/common/images/magnify-clip' . ( $wgContLang->isRTL() ? '-rtl' : '' ) . '.png',
 746                                                         'width' => 15,
 747                                                         'height' => 11,
 748                                                         'alt' => "" ) ) ) );
 749                         }
 750                 }
 751                 $s .= '  <div class="thumbcaption">' . $zoomIcon . $fp['caption'] . "</div></div></div>";
 752                 return str_replace( "\n", ' ', $s );
 753         }
 754
 755         /**
 756          * Make a "broken" link to an image
 757          *
 758          * @param $title Title object
 759          * @param $text String: link label in unescaped text form
 760          * @param $query String: query string
 761          * @param $trail String: link trail (HTML fragment)
 762          * @param $prefix String: link prefix (HTML fragment)
 763          * @param $time Boolean: a file of a certain timestamp was requested
 764          * @return String
 765          */
 766         public static function makeBrokenImageLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '', $time = false ) {
 767                 global $wgEnableUploads, $wgUploadMissingFileUrl;
 768                 if ( ! $title instanceof Title ) {
 769                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 770                 }
 771                 wfProfileIn( __METHOD__ );
 772                 $currentExists = $time ? ( wfFindFile( $title ) != false ) : false;
 773
 774                 list( $inside, $trail ) = self::splitTrail( $trail );
 775                 if ( $text == '' )
 776                         $text = htmlspecialchars( $title->getPrefixedText() );
 777
 778                 if ( ( $wgUploadMissingFileUrl || $wgEnableUploads ) && !$currentExists ) {
 779                         $redir = RepoGroup::singleton()->getLocalRepo()->checkRedirect( $title );
 780
 781                         if ( $redir ) {
 782                                 wfProfileOut( __METHOD__ );
 783                                 return self::linkKnown( $title, "$prefix$text$inside", array(), $query ) . $trail;
 784                         }
 785
 786                         $href = self::getUploadUrl( $title, $query );
 787
 788                         wfProfileOut( __METHOD__ );
 789                         return '<a href="' . htmlspecialchars( $href ) . '" class="new" title="' .
 790                                 htmlspecialchars( $title->getPrefixedText(), ENT_QUOTES ) . '">' .
 791                                 "$prefix$text$inside</a>$trail";
 792                 } else {
 793                         wfProfileOut( __METHOD__ );
 794                         return self::linkKnown( $title, "$prefix$text$inside", array(), $query ) . $trail;
 795                 }
 796         }
 797
 798         /**
 799          * Get the URL to upload a certain file
 800          *
 801          * @param $destFile Title object of the file to upload
 802          * @param $query String: urlencoded query string to prepend
 803          * @return String: urlencoded URL
 804          */
 805         protected static function getUploadUrl( $destFile, $query = '' ) {
 806                 global $wgUploadMissingFileUrl;
 807                 $q = 'wpDestFile=' . $destFile->getPartialUrl();
 808                 if ( $query != '' )
 809                         $q .= '&' . $query;
 810
 811                 if ( $wgUploadMissingFileUrl ) {
 812                         return wfAppendQuery( $wgUploadMissingFileUrl, $q );
 813                 } else {
 814                         $upload = SpecialPage::getTitleFor( 'Upload' );
 815                         return $upload->getLocalUrl( $q );
 816                 }
 817         }
 818
 819         /**
 820          * Create a direct link to a given uploaded file.
 821          *
 822          * @param $title Title object.
 823          * @param $text String: pre-sanitized HTML
 824          * @param $time string: MW timestamp of file creation time
 825          * @return String: HTML
 826          */
 827         public static function makeMediaLinkObj( $title, $text = '', $time = false ) {
 828                 $img = wfFindFile( $title, array( 'time' => $time ) );
 829                 return self::makeMediaLinkFile( $title, $img, $text );
 830         }
 831
 832         /**
 833          * Create a direct link to a given uploaded file.
 834          * This will make a broken link if $file is false.
 835          *
 836          * @param $title Title object.
 837          * @param $file mixed File object or false
 838          * @param $text String: pre-sanitized HTML
 839          * @return String: HTML
 840          *
 841          * @todo Handle invalid or missing images better.
 842          */
 843         public static function makeMediaLinkFile( Title $title, $file, $text = '' ) {
 844                 if ( $file && $file->exists() ) {
 845                         $url = $file->getURL();
 846                         $class = 'internal';
 847                 } else {
 848                         $url = self::getUploadUrl( $title );
 849                         $class = 'new';
 850                 }
 851                 $alt = htmlspecialchars( $title->getText(), ENT_QUOTES );
 852                 if ( $text == '' ) {
 853                         $text = $alt;
 854                 }
 855                 $u = htmlspecialchars( $url );
 856                 return "<a href=\"{$u}\" class=\"$class\" title=\"{$alt}\">{$text}</a>";
 857         }
 858
 859         /**
 860          *  Make a link to a special page given its name and, optionally,
 861          * a message key from the link text.
 862          * Usage example: $skin->specialLink( 'recentchanges' )
 863          */
 864         static function specialLink( $name, $key = '' ) {
 865                 if ( $key == '' ) { $key = strtolower( $name ); }
 866
 867                 return self::linkKnown( SpecialPage::getTitleFor( $name ) , wfMsg( $key ) );
 868         }
 869
 870         /**
 871          * Make an external link
 872          * @param $url String: URL to link to
 873          * @param $text String: text of link
 874          * @param $escape Boolean: do we escape the link text?
 875          * @param $linktype String: type of external link. Gets added to the classes
 876          * @param $attribs Array of extra attributes to <a>
 877          */
 878         static function makeExternalLink( $url, $text, $escape = true, $linktype = '', $attribs = array() ) {
 879                 $class = "external";
 880                 if ( isset($linktype) && $linktype ) {
 881                         $class .= " $linktype";
 882                 }
 883                 if ( isset($attribs['class']) && $attribs['class'] ) {
 884                         $class .= " {$attribs['class']}";
 885                 }
 886                 $attribs['class'] = $class;
 887
 888                 if ( $escape ) {
 889                         $text = htmlspecialchars( $text );
 890                 }
 891                 $link = '';
 892                 $success = wfRunHooks( 'LinkerMakeExternalLink',
 893                         array( &$url, &$text, &$link, &$attribs, $linktype ) );
 894                 if ( !$success ) {
 895                         wfDebug( "Hook LinkerMakeExternalLink changed the output of link with url {$url} and text {$text} to {$link}\n", true );
 896                         return $link;
 897                 }
 898                 $attribs['href'] = $url;
 899                 return Html::rawElement( 'a', $attribs, $text );
 900         }
 901
 902         /**
 903          * Make user link (or user contributions for unregistered users)
 904          * @param $userId   Integer: user id in database.
 905          * @param $userText String: user name in database
 906          * @return String: HTML fragment
 907          * @private
 908          */
 909         static function userLink( $userId, $userText ) {
 910                 if ( $userId == 0 ) {
 911                         $page = SpecialPage::getTitleFor( 'Contributions', $userText );
 912                 } else {
 913                         $page = Title::makeTitle( NS_USER, $userText );
 914                 }
 915                 return self::link( $page, htmlspecialchars( $userText ), array( 'class' => 'mw-userlink' ) );
 916         }
 917
 918         /**
 919          * Generate standard user tool links (talk, contributions, block link, etc.)
 920          *
 921          * @param $userId Integer: user identifier
 922          * @param $userText String: user name or IP address
 923          * @param $redContribsWhenNoEdits Boolean: should the contributions link be
 924          *        red if the user has no edits?
 925          * @param $flags Integer: customisation flags (e.g. Linker::TOOL_LINKS_NOBLOCK)
 926          * @param $edits Integer: user edit count (optional, for performance)
 927          * @return String: HTML fragment
 928          */
 929         public static function userToolLinks(
 930                 $userId, $userText, $redContribsWhenNoEdits = false, $flags = 0, $edits = null
 931         ) {
 932                 global $wgUser, $wgDisableAnonTalk, $wgLang;
 933                 $talkable = !( $wgDisableAnonTalk && 0 == $userId );
 934                 $blockable = !$flags & self::TOOL_LINKS_NOBLOCK;
 935
 936                 $items = array();
 937                 if ( $talkable ) {
 938                         $items[] = self::userTalkLink( $userId, $userText );
 939                 }
 940                 if ( $userId ) {
 941                         // check if the user has an edit
 942                         $attribs = array();
 943                         if ( $redContribsWhenNoEdits ) {
 944                                 $count = !is_null( $edits ) ? $edits : User::edits( $userId );
 945                                 if ( $count == 0 ) {
 946                                         $attribs['class'] = 'new';
 947                                 }
 948                         }
 949                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 950
 951                         $items[] = self::link( $contribsPage, wfMsgHtml( 'contribslink' ), $attribs );
 952                 }
 953                 if ( $blockable && $wgUser->isAllowed( 'block' ) ) {
 954                         $items[] = self::blockLink( $userId, $userText );
 955                 }
 956
 957                 if ( $items ) {
 958                         return ' <span class="mw-usertoollinks">(' . $wgLang->pipeList( $items ) . ')</span>';
 959                 } else {
 960                         return '';
 961                 }
 962         }
 963
 964         /**
 965          * Alias for userToolLinks( $userId, $userText, true );
 966          * @param $userId Integer: user identifier
 967          * @param $userText String: user name or IP address
 968          * @param $edits Integer: user edit count (optional, for performance)
 969          */
 970         public static function userToolLinksRedContribs( $userId, $userText, $edits = null ) {
 971                 return self::userToolLinks( $userId, $userText, true, 0, $edits );
 972         }
 973
 974
 975         /**
 976          * @param $userId Integer: user id in database.
 977          * @param $userText String: user name in database.
 978          * @return String: HTML fragment with user talk link
 979          * @private
 980          */
 981         static function userTalkLink( $userId, $userText ) {
 982                 $userTalkPage = Title::makeTitle( NS_USER_TALK, $userText );
 983                 $userTalkLink = self::link( $userTalkPage, wfMsgHtml( 'talkpagelinktext' ) );
 984                 return $userTalkLink;
 985         }
 986
 987         /**
 988          * @param $userId Integer: userid
 989          * @param $userText String: user name in database.
 990          * @return String: HTML fragment with block link
 991          * @private
 992          */
 993         static function blockLink( $userId, $userText ) {
 994                 $blockPage = SpecialPage::getTitleFor( 'Block', $userText );
 995                 $blockLink = self::link( $blockPage, wfMsgHtml( 'blocklink' ) );
 996                 return $blockLink;
 997         }
 998
 999         /**
1000          * Generate a user link if the current user is allowed to view it
1001          * @param $rev Revision object.
1002          * @param $isPublic Boolean: show only if all users can see it
1003          * @return String: HTML fragment
1004          */
1005         static function revUserLink( $rev, $isPublic = false ) {
1006                 if ( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
1007                         $link = wfMsgHtml( 'rev-deleted-user' );
1008                 } else if ( $rev->userCan( Revision::DELETED_USER ) ) {
1009                         $link = self::userLink( $rev->getUser( Revision::FOR_THIS_USER ),
1010                                 $rev->getUserText( Revision::FOR_THIS_USER ) );
1011                 } else {
1012                         $link = wfMsgHtml( 'rev-deleted-user' );
1013                 }
1014                 if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
1015                         return '<span class="history-deleted">' . $link . '</span>';
1016                 }
1017                 return $link;
1018         }
1019
1020         /**
1021          * Generate a user tool link cluster if the current user is allowed to view it
1022          * @param $rev Revision object.
1023          * @param $isPublic Boolean: show only if all users can see it
1024          * @return string HTML
1025          */
1026         static function revUserTools( $rev, $isPublic = false ) {
1027                 if ( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
1028                         $link = wfMsgHtml( 'rev-deleted-user' );
1029                 } else if ( $rev->userCan( Revision::DELETED_USER ) ) {
1030                         $userId = $rev->getUser( Revision::FOR_THIS_USER );
1031                         $userText = $rev->getUserText( Revision::FOR_THIS_USER );
1032                         $link = self::userLink( $userId, $userText ) .
1033                                 ' ' . self::userToolLinks( $userId, $userText );
1034                 } else {
1035                         $link = wfMsgHtml( 'rev-deleted-user' );
1036                 }
1037                 if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
1038                         return ' <span class="history-deleted">' . $link . '</span>';
1039                 }
1040                 return $link;
1041         }
1042
1043         /**
1044          * This function is called by all recent changes variants, by the page history,
1045          * and by the user contributions list. It is responsible for formatting edit
1046          * comments. It escapes any HTML in the comment, but adds some CSS to format
1047          * auto-generated comments (from section editing) and formats [[wikilinks]].
1048          *
1049          * @author Erik Moeller <moeller@scireview.de>
1050          *
1051          * Note: there's not always a title to pass to this function.
1052          * Since you can't set a default parameter for a reference, I've turned it
1053          * temporarily to a value pass. Should be adjusted further. --brion
1054          *
1055          * @param $comment String
1056          * @param $title Mixed: Title object (to generate link to the section in autocomment) or null
1057          * @param $local Boolean: whether section links should refer to local page
1058          */
1059         static function formatComment( $comment, $title = null, $local = false ) {
1060                 wfProfileIn( __METHOD__ );
1061
1062                 # Sanitize text a bit:
1063                 $comment = str_replace( "\n", " ", $comment );
1064                 # Allow HTML entities (for bug 13815)
1065                 $comment = Sanitizer::escapeHtmlAllowEntities( $comment );
1066
1067                 # Render autocomments and make links:
1068                 $comment = self::formatAutocomments( $comment, $title, $local );
1069                 $comment = self::formatLinksInComment( $comment, $title, $local );
1070
1071                 wfProfileOut( __METHOD__ );
1072                 return $comment;
1073         }
1074
1075         /**
1076          * @var Title
1077          */
1078         static $autocommentTitle;
1079         static $autocommentLocal;
1080
1081         /**
1082          * The pattern for autogen comments is / * foo * /, which makes for
1083          * some nasty regex.
1084          * We look for all comments, match any text before and after the comment,
1085          * add a separator where needed and format the comment itself with CSS
1086          * Called by Linker::formatComment.
1087          *
1088          * @param $comment String: comment text
1089          * @param $title An optional title object used to links to sections
1090          * @param $local Boolean: whether section links should refer to local page
1091          * @return String: formatted comment
1092          */
1093         private static function formatAutocomments( $comment, $title = null, $local = false ) {
1094                 // Bah!
1095                 self::$autocommentTitle = $title;
1096                 self::$autocommentLocal = $local;
1097                 $comment = preg_replace_callback(
1098                         '!(.*)/\*\s*(.*?)\s*\*/(.*)!',
1099                         array( 'Linker', 'formatAutocommentsCallback' ),
1100                         $comment );
1101                 self::$autocommentTitle = null;
1102                 self::$autocommentLocal = null;
1103                 return $comment;
1104         }
1105
1106         private static function formatAutocommentsCallback( $match ) {
1107                 $title = self::$autocommentTitle;
1108                 $local = self::$autocommentLocal;
1109
1110                 $pre = $match[1];
1111                 $auto = $match[2];
1112                 $post = $match[3];
1113                 $link = '';
1114                 if ( $title ) {
1115                         $section = $auto;
1116
1117                         # Remove links that a user may have manually put in the autosummary
1118                         # This could be improved by copying as much of Parser::stripSectionName as desired.
1119                         $section = str_replace( '[[:', '', $section );
1120                         $section = str_replace( '[[', '', $section );
1121                         $section = str_replace( ']]', '', $section );
1122
1123                         $section = Sanitizer::normalizeSectionNameWhitespace( $section ); # bug 22784
1124                         if ( $local ) {
1125                                 $sectionTitle = Title::newFromText( '#' . $section );
1126                         } else {
1127                                 $sectionTitle = Title::makeTitleSafe( $title->getNamespace(),
1128                                         $title->getDBkey(), $section );
1129                         }
1130                         if ( $sectionTitle ) {
1131                                 $link = self::link( $sectionTitle,
1132                                         htmlspecialchars( wfMsgForContent( 'sectionlink' ) ), array(), array(),
1133                                         'noclasses' );
1134                         } else {
1135                                 $link = '';
1136                         }
1137                 }
1138                 $auto = "$link$auto";
1139                 if ( $pre ) {
1140                         # written summary $presep autocomment (summary /* section */)
1141                         $auto = wfMsgExt( 'autocomment-prefix', array( 'escapenoentities', 'content' ) ) . $auto;
1142                 }
1143                 if ( $post ) {
1144                         # autocomment $postsep written summary (/* section */ summary)
1145                         $auto .= wfMsgExt( 'colon-separator', array( 'escapenoentities', 'content' ) );
1146                 }
1147                 $auto = '<span class="autocomment">' . $auto . '</span>';
1148                 $comment = $pre . $auto . $post;
1149                 return $comment;
1150         }
1151
1152         static $commentContextTitle;
1153         static $commentLocal;
1154
1155         /**
1156          * Formats wiki links and media links in text; all other wiki formatting
1157          * is ignored
1158          *
1159          * @todo FIXME: Doesn't handle sub-links as in image thumb texts like the main parser
1160          * @param $comment String: text to format links in
1161          * @param $title An optional title object used to links to sections
1162          * @param $local Boolean: whether section links should refer to local page
1163          * @return String
1164          */
1165         public static function formatLinksInComment( $comment, $title = null, $local = false ) {
1166                 self::$commentContextTitle = $title;
1167                 self::$commentLocal = $local;
1168                 $html = preg_replace_callback(
1169                         '/\[\[:?(.*?)(\|(.*?))*\]\]([^[]*)/',
1170                         array( 'Linker', 'formatLinksInCommentCallback' ),
1171                         $comment );
1172                 self::$commentContextTitle = null;
1173                 self::$commentLocal = null;
1174                 return $html;
1175         }
1176
1177         protected static function formatLinksInCommentCallback( $match ) {
1178                 global $wgContLang;
1179
1180                 $medians = '(?:' . preg_quote( MWNamespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
1181                 $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
1182
1183                 $comment = $match[0];
1184
1185                 # fix up urlencoded title texts (copied from Parser::replaceInternalLinks)
1186                 if ( strpos( $match[1], '%' ) !== false ) {
1187                         $match[1] = str_replace( array( '<', '>' ), array( '&lt;', '&gt;' ), rawurldecode( $match[1] ) );
1188                 }
1189
1190                 # Handle link renaming [[foo|text]] will show link as "text"
1191                 if ( $match[3] != "" ) {
1192                         $text = $match[3];
1193                 } else {
1194                         $text = $match[1];
1195                 }
1196                 $submatch = array();
1197                 $thelink = null;
1198                 if ( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
1199                         # Media link; trail not supported.
1200                         $linkRegexp = '/\[\[(.*?)\]\]/';
1201                         $title = Title::makeTitleSafe( NS_FILE, $submatch[1] );
1202                         $thelink = self::makeMediaLinkObj( $title, $text );
1203                 } else {
1204                         # Other kind of link
1205                         if ( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
1206                                 $trail = $submatch[1];
1207                         } else {
1208                                 $trail = "";
1209                         }
1210                         $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
1211                         if ( isset( $match[1][0] ) && $match[1][0] == ':' )
1212                                 $match[1] = substr( $match[1], 1 );
1213                         list( $inside, $trail ) = self::splitTrail( $trail );
1214
1215                         $linkText = $text;
1216                         $linkTarget = self::normalizeSubpageLink( self::$commentContextTitle,
1217                                 $match[1], $linkText );
1218
1219                         $target = Title::newFromText( $linkTarget );
1220                         if ( $target ) {
1221                                 if ( $target->getText() == '' && $target->getInterwiki() === ''
1222                                         && !self::$commentLocal && self::$commentContextTitle )
1223                                 {
1224                                         $newTarget = clone ( self::$commentContextTitle );
1225                                         $newTarget->setFragment( '#' . $target->getFragment() );
1226                                         $target = $newTarget;
1227                                 }
1228                                 $thelink = self::link(
1229                                         $target,
1230                                         $linkText . $inside
1231                                 ) . $trail;
1232                         }
1233                 }
1234                 if ( $thelink ) {
1235                         // If the link is still valid, go ahead and replace it in!
1236                         $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
1237                 }
1238
1239                 return $comment;
1240         }
1241
1242         /**
1243          * @param $contextTitle Title
1244          * @param  $target
1245          * @param  $text
1246          * @return string
1247          */
1248         static function normalizeSubpageLink( $contextTitle, $target, &$text ) {
1249                 # Valid link forms:
1250                 # Foobar -- normal
1251                 # :Foobar -- override special treatment of prefix (images, language links)
1252                 # /Foobar -- convert to CurrentPage/Foobar
1253                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1254                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1255                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1256
1257                 wfProfileIn( __METHOD__ );
1258                 $ret = $target; # default return value is no change
1259
1260                 # Some namespaces don't allow subpages,
1261                 # so only perform processing if subpages are allowed
1262                 if ( $contextTitle && MWNamespace::hasSubpages( $contextTitle->getNamespace() ) ) {
1263                         $hash = strpos( $target, '#' );
1264                         if ( $hash !== false ) {
1265                                 $suffix = substr( $target, $hash );
1266                                 $target = substr( $target, 0, $hash );
1267                         } else {
1268                                 $suffix = '';
1269                         }
1270                         # bug 7425
1271                         $target = trim( $target );
1272                         # Look at the first character
1273                         if ( $target != '' && $target { 0 } === '/' ) {
1274                                 # / at end means we don't want the slash to be shown
1275                                 $m = array();
1276                                 $trailingSlashes = preg_match_all( '%(/+)$%', $target, $m );
1277                                 if ( $trailingSlashes ) {
1278                                         $noslash = $target = substr( $target, 1, -strlen( $m[0][0] ) );
1279                                 } else {
1280                                         $noslash = substr( $target, 1 );
1281                                 }
1282
1283                                 $ret = $contextTitle->getPrefixedText() . '/' . trim( $noslash ) . $suffix;
1284                                 if ( $text === '' ) {
1285                                         $text = $target . $suffix;
1286                                 } # this might be changed for ugliness reasons
1287                         } else {
1288                                 # check for .. subpage backlinks
1289                                 $dotdotcount = 0;
1290                                 $nodotdot = $target;
1291                                 while ( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1292                                         ++$dotdotcount;
1293                                         $nodotdot = substr( $nodotdot, 3 );
1294                                 }
1295                                 if ( $dotdotcount > 0 ) {
1296                                         $exploded = explode( '/', $contextTitle->GetPrefixedText() );
1297                                         if ( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1298                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1299                                                 # / at the end means don't show full path
1300                                                 if ( substr( $nodotdot, -1, 1 ) === '/' ) {
1301                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1302                                                         if ( $text === '' ) {
1303                                                                 $text = $nodotdot . $suffix;
1304                                                         }
1305                                                 }
1306                                                 $nodotdot = trim( $nodotdot );
1307                                                 if ( $nodotdot != '' ) {
1308                                                         $ret .= '/' . $nodotdot;
1309                                                 }
1310                                                 $ret .= $suffix;
1311                                         }
1312                                 }
1313                         }
1314                 }
1315
1316                 wfProfileOut( __METHOD__ );
1317                 return $ret;
1318         }
1319
1320         /**
1321          * Wrap a comment in standard punctuation and formatting if
1322          * it's non-empty, otherwise return empty string.
1323          *
1324          * @param $comment String
1325          * @param $title Mixed: Title object (to generate link to section in autocomment) or null
1326          * @param $local Boolean: whether section links should refer to local page
1327          * @param $embraced Boolean: whether the formatted comment should be embraced with ()
1328          * @return string
1329          */
1330         static function commentBlock( $comment, $title = null, $local = false, $embraced = true ) {
1331                 // '*' used to be the comment inserted by the software way back
1332                 // in antiquity in case none was provided, here for backwards
1333                 // compatability, acc. to brion -ævar
1334                 if ( $comment == '' || $comment == '*' ) {
1335                         return '';
1336                 } else {
1337                         $formatted = self::formatComment( $comment, $title, $local );
1338                         if ( $embraced ) {
1339                                 $formatted = wfMessage( 'parentheses' )->rawParams( $formatted )->escaped();
1340                         }
1341                         return Html::rawElement( 'span', array( 'class' => 'comment' ), $formatted );
1342                 }
1343         }
1344
1345         /**
1346          * Wrap and format the given revision's comment block, if the current
1347          * user is allowed to view it.
1348          *
1349          * @param $rev Revision object
1350          * @param $local Boolean: whether section links should refer to local page
1351          * @param $isPublic Boolean: show only if all users can see it
1352          * @return String: HTML fragment
1353          */
1354         static function revComment( Revision $rev, $local = false, $isPublic = false ) {
1355                 if ( $rev->getRawComment() == "" ) {
1356                         return "";
1357                 }
1358                 if ( $rev->isDeleted( Revision::DELETED_COMMENT ) && $isPublic ) {
1359                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1360                 } else if ( $rev->userCan( Revision::DELETED_COMMENT ) ) {
1361                         $block = self::commentBlock( $rev->getComment( Revision::FOR_THIS_USER ),
1362                                 $rev->getTitle(), $local );
1363                 } else {
1364                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1365                 }
1366                 if ( $rev->isDeleted( Revision::DELETED_COMMENT ) ) {
1367                         return " <span class=\"history-deleted\">$block</span>";
1368                 }
1369                 return $block;
1370         }
1371
1372         public static function formatRevisionSize( $size ) {
1373                 if ( $size == 0 ) {
1374                         $stxt = wfMsgExt( 'historyempty', 'parsemag' );
1375                 } else {
1376                         global $wgLang;
1377                         $stxt = wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $size ) );
1378                         $stxt = "($stxt)";
1379                 }
1380                 $stxt = htmlspecialchars( $stxt );
1381                 return "<span class=\"history-size\">$stxt</span>";
1382         }
1383
1384         /**
1385          * Add another level to the Table of Contents
1386          */
1387         static function tocIndent() {
1388                 return "\n<ul>";
1389         }
1390
1391         /**
1392          * Finish one or more sublevels on the Table of Contents
1393          */
1394         static function tocUnindent( $level ) {
1395                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level > 0 ? $level : 0 );
1396         }
1397
1398         /**
1399          * parameter level defines if we are on an indentation level
1400          */
1401         static function tocLine( $anchor, $tocline, $tocnumber, $level, $sectionIndex = false ) {
1402                 $classes = "toclevel-$level";
1403                 if ( $sectionIndex !== false )
1404                         $classes .= " tocsection-$sectionIndex";
1405                 return "\n<li class=\"$classes\"><a href=\"#" .
1406                         $anchor . '"><span class="tocnumber">' .
1407                         $tocnumber . '</span> <span class="toctext">' .
1408                         $tocline . '</span></a>';
1409         }
1410
1411         /**
1412          * End a Table Of Contents line.
1413          * tocUnindent() will be used instead if we're ending a line below
1414          * the new level.
1415          */
1416         static function tocLineEnd() {
1417                 return "</li>\n";
1418         }
1419
1420         /**
1421          * Wraps the TOC in a table and provides the hide/collapse javascript.
1422          *
1423          * @param $toc String: html of the Table Of Contents
1424          * @param $lang mixed: Language code for the toc title
1425          * @return String: full html of the TOC
1426          */
1427         static function tocList( $toc, $lang = false ) {
1428                 $title = wfMsgExt( 'toc', array( 'language' => $lang, 'escape' ) );
1429                 return
1430                    '<table id="toc" class="toc"><tr><td>'
1431                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
1432                  . $toc
1433                  . "</ul>\n</td></tr></table>\n";
1434         }
1435
1436         /**
1437          * Generate a table of contents from a section tree
1438          * Currently unused.
1439          *
1440          * @param $tree Return value of ParserOutput::getSections()
1441          * @return String: HTML fragment
1442          */
1443         public static function generateTOC( $tree ) {
1444                 $toc = '';
1445                 $lastLevel = 0;
1446                 foreach ( $tree as $section ) {
1447                         if ( $section['toclevel'] > $lastLevel )
1448                                 $toc .= self::tocIndent();
1449                         else if ( $section['toclevel'] < $lastLevel )
1450                                 $toc .= self::tocUnindent(
1451                                         $lastLevel - $section['toclevel'] );
1452                         else
1453                                 $toc .= self::tocLineEnd();
1454
1455                         $toc .= self::tocLine( $section['anchor'],
1456                                 $section['line'], $section['number'],
1457                                 $section['toclevel'], $section['index'] );
1458                         $lastLevel = $section['toclevel'];
1459                 }
1460                 $toc .= self::tocLineEnd();
1461                 return self::tocList( $toc );
1462         }
1463
1464         /**
1465          * Create a headline for content
1466          *
1467          * @param $level Integer: the level of the headline (1-6)
1468          * @param $attribs String: any attributes for the headline, starting with
1469          *                 a space and ending with '>'
1470          *                 This *must* be at least '>' for no attribs
1471          * @param $anchor String: the anchor to give the headline (the bit after the #)
1472          * @param $text String: the text of the header
1473          * @param $link String: HTML to add for the section edit link
1474          * @param $legacyAnchor Mixed: a second, optional anchor to give for
1475          *   backward compatibility (false to omit)
1476          *
1477          * @return String: HTML headline
1478          */
1479         public static function makeHeadline( $level, $attribs, $anchor, $text, $link, $legacyAnchor = false ) {
1480                 $ret = "<h$level$attribs"
1481                         . $link
1482                         . " <span class=\"mw-headline\" id=\"$anchor\">$text</span>"
1483                         . "</h$level>";
1484                 if ( $legacyAnchor !== false ) {
1485                         $ret = "<div id=\"$legacyAnchor\"></div>$ret";
1486                 }
1487                 return $ret;
1488         }
1489
1490         /**
1491          * Split a link trail, return the "inside" portion and the remainder of the trail
1492          * as a two-element array
1493          */
1494         static function splitTrail( $trail ) {
1495                 global $wgContLang;
1496                 $regex = $wgContLang->linkTrail();
1497                 $inside = '';
1498                 if ( $trail !== '' ) {
1499                         $m = array();
1500                         if ( preg_match( $regex, $trail, $m ) ) {
1501                                 $inside = $m[1];
1502                                 $trail = $m[2];
1503                         }
1504                 }
1505                 return array( $inside, $trail );
1506         }
1507
1508         /**
1509          * Generate a rollback link for a given revision.  Currently it's the
1510          * caller's responsibility to ensure that the revision is the top one. If
1511          * it's not, of course, the user will get an error message.
1512          *
1513          * If the calling page is called with the parameter &bot=1, all rollback
1514          * links also get that parameter. It causes the edit itself and the rollback
1515          * to be marked as "bot" edits. Bot edits are hidden by default from recent
1516          * changes, so this allows sysops to combat a busy vandal without bothering
1517          * other users.
1518          *
1519          * @param $rev Revision object
1520          */
1521         static function generateRollback( $rev ) {
1522                 return '<span class="mw-rollback-link">['
1523                         . self::buildRollbackLink( $rev )
1524                         . ']</span>';
1525         }
1526
1527         /**
1528          * Build a raw rollback link, useful for collections of "tool" links
1529          *
1530          * @param $rev Revision object
1531          * @return String: HTML fragment
1532          */
1533         public static function buildRollbackLink( $rev ) {
1534                 global $wgRequest, $wgUser;
1535                 $title = $rev->getTitle();
1536                 $query = array(
1537                         'action' => 'rollback',
1538                         'from' => $rev->getUserText(),
1539                         'token' => $wgUser->editToken( array( $title->getPrefixedText(), $rev->getUserText() ) ),
1540                 );
1541                 if ( $wgRequest->getBool( 'bot' ) ) {
1542                         $query['bot'] = '1';
1543                         $query['hidediff'] = '1'; // bug 15999
1544                 }
1545                 return self::link(
1546                         $title,
1547                         wfMsgHtml( 'rollbacklink' ),
1548                         array( 'title' => wfMsg( 'tooltip-rollback' ) ),
1549                         $query,
1550                         array( 'known', 'noclasses' )
1551                 );
1552         }
1553
1554         /**
1555          * Returns HTML for the "templates used on this page" list.
1556          *
1557          * @param $templates Array of templates from Article::getUsedTemplate
1558          * or similar
1559          * @param $preview Boolean: whether this is for a preview
1560          * @param $section Boolean: whether this is for a section edit
1561          * @return String: HTML output
1562          */
1563         public static function formatTemplates( $templates, $preview = false, $section = false ) {
1564                 wfProfileIn( __METHOD__ );
1565
1566                 $outText = '';
1567                 if ( count( $templates ) > 0 ) {
1568                         # Do a batch existence check
1569                         $batch = new LinkBatch;
1570                         foreach ( $templates as $title ) {
1571                                 $batch->addObj( $title );
1572                         }
1573                         $batch->execute();
1574
1575                         # Construct the HTML
1576                         $outText = '<div class="mw-templatesUsedExplanation">';
1577                         if ( $preview ) {
1578                                 $outText .= wfMsgExt( 'templatesusedpreview', array( 'parse' ), count( $templates ) );
1579                         } elseif ( $section ) {
1580                                 $outText .= wfMsgExt( 'templatesusedsection', array( 'parse' ), count( $templates ) );
1581                         } else {
1582                                 $outText .= wfMsgExt( 'templatesused', array( 'parse' ), count( $templates ) );
1583                         }
1584                         $outText .= "</div><ul>\n";
1585
1586                         usort( $templates, array( 'Title', 'compare' ) );
1587                         foreach ( $templates as $titleObj ) {
1588                                 $r = $titleObj->getRestrictions( 'edit' );
1589                                 if ( in_array( 'sysop', $r ) ) {
1590                                         $protected = wfMsgExt( 'template-protected', array( 'parseinline' ) );
1591                                 } elseif ( in_array( 'autoconfirmed', $r ) ) {
1592                                         $protected = wfMsgExt( 'template-semiprotected', array( 'parseinline' ) );
1593                                 } else {
1594                                         $protected = '';
1595                                 }
1596                                 if ( $titleObj->quickUserCan( 'edit' ) ) {
1597                                         $editLink = self::link(
1598                                                 $titleObj,
1599                                                 wfMsg( 'editlink' ),
1600                                                 array(),
1601                                                 array( 'action' => 'edit' )
1602                                         );
1603                                 } else {
1604                                         $editLink = self::link(
1605                                                 $titleObj,
1606                                                 wfMsg( 'viewsourcelink' ),
1607                                                 array(),
1608                                                 array( 'action' => 'edit' )
1609                                         );
1610                                 }
1611                                 $outText .= '<li>' . self::link( $titleObj ) . ' (' . $editLink . ') ' . $protected . '</li>';
1612                         }
1613                         $outText .= '</ul>';
1614                 }
1615                 wfProfileOut( __METHOD__  );
1616                 return $outText;
1617         }
1618
1619         /**
1620          * Returns HTML for the "hidden categories on this page" list.
1621          *
1622          * @param $hiddencats Array of hidden categories from Article::getHiddenCategories
1623          * or similar
1624          * @return String: HTML output
1625          */
1626         public static function formatHiddenCategories( $hiddencats ) {
1627                 global $wgLang;
1628                 wfProfileIn( __METHOD__ );
1629
1630                 $outText = '';
1631                 if ( count( $hiddencats ) > 0 ) {
1632                         # Construct the HTML
1633                         $outText = '<div class="mw-hiddenCategoriesExplanation">';
1634                         $outText .= wfMsgExt( 'hiddencategories', array( 'parse' ), $wgLang->formatnum( count( $hiddencats ) ) );
1635                         $outText .= "</div><ul>\n";
1636
1637                         foreach ( $hiddencats as $titleObj ) {
1638                                 $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
1639                         }
1640                         $outText .= '</ul>';
1641                 }
1642                 wfProfileOut( __METHOD__  );
1643                 return $outText;
1644         }
1645
1646         /**
1647          * Format a size in bytes for output, using an appropriate
1648          * unit (B, KB, MB or GB) according to the magnitude in question
1649          *
1650          * @param $size Size to format
1651          * @return String
1652          */
1653         public static function formatSize( $size ) {
1654                 global $wgLang;
1655                 return htmlspecialchars( $wgLang->formatSize( $size ) );
1656         }
1657
1658         /**
1659          * Given the id of an interface element, constructs the appropriate title
1660          * attribute from the system messages.  (Note, this is usually the id but
1661          * isn't always, because sometimes the accesskey needs to go on a different
1662          * element than the id, for reverse-compatibility, etc.)
1663          *
1664          * @param $name String: id of the element, minus prefixes.
1665          * @param $options Mixed: null or the string 'withaccess' to add an access-
1666          *   key hint
1667          * @return String: contents of the title attribute (which you must HTML-
1668          *   escape), or false for no title attribute
1669          */
1670         public static function titleAttrib( $name, $options = null ) {
1671                 wfProfileIn( __METHOD__ );
1672
1673                 $message = wfMessage( "tooltip-$name" );
1674
1675                 if ( !$message->exists() ) {
1676                         $tooltip = false;
1677                 } else {
1678                         $tooltip = $message->text();
1679                         # Compatibility: formerly some tooltips had [alt-.] hardcoded
1680                         $tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
1681                         # Message equal to '-' means suppress it.
1682                         if (  $tooltip == '-' ) {
1683                                 $tooltip = false;
1684                         }
1685                 }
1686
1687                 if ( $options == 'withaccess' ) {
1688                         $accesskey = self::accesskey( $name );
1689                         if ( $accesskey !== false ) {
1690                                 if ( $tooltip === false || $tooltip === '' ) {
1691                                         $tooltip = "[$accesskey]";
1692                                 } else {
1693                                         $tooltip .= " [$accesskey]";
1694                                 }
1695                         }
1696                 }
1697
1698                 wfProfileOut( __METHOD__ );
1699                 return $tooltip;
1700         }
1701
1702         static $accesskeycache;
1703
1704         /**
1705          * Given the id of an interface element, constructs the appropriate
1706          * accesskey attribute from the system messages.  (Note, this is usually
1707          * the id but isn't always, because sometimes the accesskey needs to go on
1708          * a different element than the id, for reverse-compatibility, etc.)
1709          *
1710          * @param $name String: id of the element, minus prefixes.
1711          * @return String: contents of the accesskey attribute (which you must HTML-
1712          *   escape), or false for no accesskey attribute
1713          */
1714         public static function accesskey( $name ) {
1715                 if ( isset( self::$accesskeycache[$name] ) ) {
1716                         return self::$accesskeycache[$name];
1717                 }
1718                 wfProfileIn( __METHOD__ );
1719
1720                 $message = wfMessage( "accesskey-$name" );
1721
1722                 if ( !$message->exists() ) {
1723                         $accesskey = false;
1724                 } else {
1725                         $accesskey = $message->plain();
1726                         if ( $accesskey === '' || $accesskey === '-' ) {
1727                                 # @todo FIXME: Per standard MW behavior, a value of '-' means to suppress the
1728                                 # attribute, but this is broken for accesskey: that might be a useful
1729                                 # value.
1730                                 $accesskey = false;
1731                         }
1732                 }
1733
1734                 wfProfileOut( __METHOD__ );
1735                 return self::$accesskeycache[$name] = $accesskey;
1736         }
1737
1738         /**
1739          * Creates a (show/hide) link for deleting revisions/log entries
1740          *
1741          * @param $query Array: query parameters to be passed to link()
1742          * @param $restricted Boolean: set to true to use a <strong> instead of a <span>
1743          * @param $delete Boolean: set to true to use (show/hide) rather than (show)
1744          *
1745          * @return String: HTML <a> link to Special:Revisiondelete, wrapped in a
1746          * span to allow for customization of appearance with CSS
1747          */
1748         public static function revDeleteLink( $query = array(), $restricted = false, $delete = true ) {
1749                 $sp = SpecialPage::getTitleFor( 'Revisiondelete' );
1750                 $text = $delete ? wfMsgHtml( 'rev-delundel' ) : wfMsgHtml( 'rev-showdeleted' );
1751                 $tag = $restricted ? 'strong' : 'span';
1752                 $link = self::link( $sp, $text, array(), $query, array( 'known', 'noclasses' ) );
1753                 return Xml::tags( $tag, array( 'class' => 'mw-revdelundel-link' ), "($link)" );
1754         }
1755
1756         /**
1757          * Creates a dead (show/hide) link for deleting revisions/log entries
1758          *
1759          * @param $delete Boolean: set to true to use (show/hide) rather than (show)
1760          *
1761          * @return string HTML text wrapped in a span to allow for customization
1762          * of appearance with CSS
1763          */
1764         public static function revDeleteLinkDisabled( $delete = true ) {
1765                 $text = $delete ? wfMsgHtml( 'rev-delundel' ) : wfMsgHtml( 'rev-showdeleted' );
1766                 return Xml::tags( 'span', array( 'class' => 'mw-revdelundel-link' ), "($text)" );
1767         }
1768
1769         /* Deprecated methods */
1770
1771         /**
1772          * @deprecated since 1.16 Use link()
1773          *
1774          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
1775          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
1776          *
1777          * @param $title String: The text of the title
1778          * @param $text String: Link text
1779          * @param $query String: Optional query part
1780          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
1781          *               be included in the link text. Other characters will be appended after
1782          *               the end of the link.
1783          */
1784         static function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
1785                 $nt = Title::newFromText( $title );
1786                 if ( $nt instanceof Title ) {
1787                         return self::makeBrokenLinkObj( $nt, $text, $query, $trail );
1788                 } else {
1789                         wfDebug( 'Invalid title passed to self::makeBrokenLink(): "' . $title . "\"\n" );
1790                         return $text == '' ? $title : $text;
1791                 }
1792         }
1793
1794         /**
1795          * @deprecated since 1.16 Use link()
1796          *
1797          * Make a link for a title which may or may not be in the database. If you need to
1798          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
1799          * call to this will result in a DB query.
1800          *
1801          * @param $nt     Title: the title object to make the link from, e.g. from
1802          *                      Title::newFromText.
1803          * @param $text  String: link text
1804          * @param $query String: optional query part
1805          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1806          *                      be included in the link text. Other characters will be appended after
1807          *                      the end of the link.
1808          * @param $prefix String: optional prefix. As trail, only before instead of after.
1809          */
1810         static function makeLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1811                 wfProfileIn( __METHOD__ );
1812                 $query = wfCgiToArray( $query );
1813                 list( $inside, $trail ) = self::splitTrail( $trail );
1814                 if ( $text === '' ) {
1815                         $text = self::linkText( $nt );
1816                 }
1817
1818                 $ret = self::link( $nt, "$prefix$text$inside", array(), $query ) . $trail;
1819
1820                 wfProfileOut( __METHOD__ );
1821                 return $ret;
1822         }
1823
1824         /**
1825          * @deprecated since 1.16 Use link()
1826          *
1827          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
1828          * it doesn't have to do a database query. It's also valid for interwiki titles and special
1829          * pages.
1830          *
1831          * @param $title  Title object of target page
1832          * @param $text   String: text to replace the title
1833          * @param $query  String: link target
1834          * @param $trail  String: text after link
1835          * @param $prefix String: text before link text
1836          * @param $aprops String: extra attributes to the a-element
1837          * @param $style  String: style to apply - if empty, use getInternalLinkAttributesObj instead
1838          * @return the a-element
1839          */
1840         static function makeKnownLinkObj(
1841                 $title, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = ''
1842         ) {
1843                 wfProfileIn( __METHOD__ );
1844
1845                 if ( $text == '' ) {
1846                         $text = self::linkText( $title );
1847                 }
1848                 $attribs = Sanitizer::mergeAttributes(
1849                         Sanitizer::decodeTagAttributes( $aprops ),
1850                         Sanitizer::decodeTagAttributes( $style )
1851                 );
1852                 $query = wfCgiToArray( $query );
1853                 list( $inside, $trail ) = self::splitTrail( $trail );
1854
1855                 $ret = self::link( $title, "$prefix$text$inside", $attribs, $query,
1856                         array( 'known', 'noclasses' ) ) . $trail;
1857
1858                 wfProfileOut( __METHOD__ );
1859                 return $ret;
1860         }
1861
1862         /**
1863          * @deprecated since 1.16 Use link()
1864          *
1865          * Make a red link to the edit page of a given title.
1866          *
1867          * @param $title Title object of the target page
1868          * @param $text  String: Link text
1869          * @param $query String: Optional query part
1870          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
1871          *                      be included in the link text. Other characters will be appended after
1872          *                      the end of the link.
1873          * @param $prefix String: Optional prefix
1874          */
1875         static function makeBrokenLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '' ) {
1876                 wfProfileIn( __METHOD__ );
1877
1878                 list( $inside, $trail ) = self::splitTrail( $trail );
1879                 if ( $text === '' ) {
1880                         $text = self::linkText( $title );
1881                 }
1882
1883                 $ret = self::link( $title, "$prefix$text$inside", array(),
1884                         wfCgiToArray( $query ), 'broken' ) . $trail;
1885
1886                 wfProfileOut( __METHOD__ );
1887                 return $ret;
1888         }
1889
1890         /**
1891          * @deprecated since 1.16 Use link()
1892          *
1893          * Make a coloured link.
1894          *
1895          * @param $nt Title object of the target page
1896          * @param $colour Integer: colour of the link
1897          * @param $text   String:  link text
1898          * @param $query  String:  optional query part
1899          * @param $trail  String:  optional trail. Alphabetic characters at the start of this string will
1900          *                      be included in the link text. Other characters will be appended after
1901          *                      the end of the link.
1902          * @param $prefix String: Optional prefix
1903          */
1904         static function makeColouredLinkObj( $nt, $colour, $text = '', $query = '', $trail = '', $prefix = '' ) {
1905                 if ( $colour != '' ) {
1906                         $style = self::getInternalLinkAttributesObj( $nt, $text, $colour );
1907                 } else {
1908                         $style = '';
1909                 }
1910                 return self::makeKnownLinkObj( $nt, $text, $query, $trail, $prefix, '', $style );
1911         }
1912
1913         /**
1914          * Returns the attributes for the tooltip and access key.
1915          */
1916         public static function tooltipAndAccesskeyAttribs( $name ) {
1917                 global $wgEnableTooltipsAndAccesskeys;
1918                 if ( !$wgEnableTooltipsAndAccesskeys )
1919                         return array();
1920                 # @todo FIXME: If Sanitizer::expandAttributes() treated "false" as "output
1921                 # no attribute" instead of "output '' as value for attribute", this
1922                 # would be three lines.
1923                 $attribs = array(
1924                         'title' => self::titleAttrib( $name, 'withaccess' ),
1925                         'accesskey' => self::accesskey( $name )
1926                 );
1927                 if ( $attribs['title'] === false ) {
1928                         unset( $attribs['title'] );
1929                 }
1930                 if ( $attribs['accesskey'] === false ) {
1931                         unset( $attribs['accesskey'] );
1932                 }
1933                 return $attribs;
1934         }
1935
1936         /**
1937          * @deprecated since 1.14
1938          * Returns raw bits of HTML, use titleAttrib()
1939          */
1940         public static function tooltip( $name, $options = null ) {
1941                 global $wgEnableTooltipsAndAccesskeys;
1942                 if ( !$wgEnableTooltipsAndAccesskeys )
1943                         return '';
1944                 # @todo FIXME: If Sanitizer::expandAttributes() treated "false" as "output
1945                 # no attribute" instead of "output '' as value for attribute", this
1946                 # would be two lines.
1947                 $tooltip = self::titleAttrib( $name, $options );
1948                 if ( $tooltip === false ) {
1949                         return '';
1950                 }
1951                 return Xml::expandAttributes( array(
1952                         'title' => $tooltip
1953                 ) );
1954         }
1955 }
1956
1957 class DummyLinker {
1958
1959         /**
1960          * Use PHP's magic __call handler to transform instance calls to a dummy instance
1961          * into static calls to the new Linker for backwards compatibility.
1962          *
1963          * @param $fname String Name of called method
1964          * @param $args Array Arguments to the method
1965          */
1966         function __call( $fname, $args ) {
1967                 return call_user_func_array( array( 'Linker', $fname ), $args );
1968         }
1969
1970 }
1971