includes/Linker.php

   1 <?php
   2 /**
   3  * Some internal bits split of from Skin.php. These functions are used
   4  * for primarily page content: links, embedded images, table of contents. Links
   5  * are also used in the skin.
   6  *
   7  * @ingroup Skins
   8  */
   9 class Linker {
  10
  11         /**
  12          * Flags for userToolLinks()
  13          */
  14         const TOOL_LINKS_NOBLOCK = 1;
  15
  16         /**
  17          * Get the appropriate HTML attributes to add to the "a" element of an ex-
  18          * ternal link, as created by [wikisyntax].
  19          *
  20          * @param $class String: the contents of the class attribute; if an empty
  21          *   string is passed, which is the default value, defaults to 'external'.
  22          * @deprecated Just pass the external class directly to something using Html::expandAttributes
  23          */
  24         static function getExternalLinkAttributes( $class = 'external' ) {
  25                 wfDeprecated( __METHOD__ );
  26                 return self::getLinkAttributesInternal( '', $class );
  27         }
  28
  29         /**
  30          * Get the appropriate HTML attributes to add to the "a" element of an in-
  31          * terwiki link.
  32          *
  33          * @param $title String: the title text for the link, URL-encoded (???) but
  34          *   not HTML-escaped
  35          * @param $unused String: unused
  36          * @param $class String: the contents of the class attribute; if an empty
  37          *   string is passed, which is the default value, defaults to 'external'.
  38          */
  39         static function getInterwikiLinkAttributes( $title, $unused = null, $class = 'external' ) {
  40                 global $wgContLang;
  41
  42                 # FIXME: We have a whole bunch of handling here that doesn't happen in
  43                 # getExternalLinkAttributes, why?
  44                 $title = urldecode( $title );
  45                 $title = $wgContLang->checkTitleEncoding( $title );
  46                 $title = preg_replace( '/[\\x00-\\x1f]/', ' ', $title );
  47
  48                 return self::getLinkAttributesInternal( $title, $class );
  49         }
  50
  51         /**
  52          * Get the appropriate HTML attributes to add to the "a" element of an in-
  53          * ternal link.
  54          *
  55          * @param $title String: the title text for the link, URL-encoded (???) but
  56          *   not HTML-escaped
  57          * @param $unused String: unused
  58          * @param $class String: the contents of the class attribute, default none
  59          */
  60         static function getInternalLinkAttributes( $title, $unused = null, $class = '' ) {
  61                 $title = urldecode( $title );
  62                 $title = str_replace( '_', ' ', $title );
  63                 return self::getLinkAttributesInternal( $title, $class );
  64         }
  65
  66         /**
  67          * Get the appropriate HTML attributes to add to the "a" element of an in-
  68          * ternal link, given the Title object for the page we want to link to.
  69          *
  70          * @param $nt Title
  71          * @param $unused String: unused
  72          * @param $class String: the contents of the class attribute, default none
  73          * @param $title Mixed: optional (unescaped) string to use in the title
  74          *   attribute; if false, default to the name of the page we're linking to
  75          */
  76         static function getInternalLinkAttributesObj( $nt, $unused = null, $class = '', $title = false ) {
  77                 if ( $title === false ) {
  78                         $title = $nt->getPrefixedText();
  79                 }
  80                 return self::getLinkAttributesInternal( $title, $class );
  81         }
  82
  83         /**
  84          * Common code for getLinkAttributesX functions
  85          */
  86         private static function getLinkAttributesInternal( $title, $class ) {
  87                 $title = htmlspecialchars( $title );
  88                 $class = htmlspecialchars( $class );
  89                 $r = '';
  90                 if ( $class != '' ) {
  91                         $r .= " class=\"$class\"";
  92                 }
  93                 if ( $title != '' ) {
  94                         $r .= " title=\"$title\"";
  95                 }
  96                 return $r;
  97         }
  98
  99         /**
 100          * Return the CSS colour of a known link
 101          *
 102          * @param $t Title object
 103          * @param $threshold Integer: user defined threshold
 104          * @return String: CSS class
 105          */
 106         static function getLinkColour( $t, $threshold ) {
 107                 $colour = '';
 108                 if ( $t->isRedirect() ) {
 109                         # Page is a redirect
 110                         $colour = 'mw-redirect';
 111                 } elseif ( $threshold > 0 &&
 112                            $t->exists() && $t->getLength() < $threshold &&
 113                            $t->isContentPage() ) {
 114                         # Page is a stub
 115                         $colour = 'stub';
 116                 }
 117                 return $colour;
 118         }
 119
 120         /**
 121          * This function returns an HTML link to the given target.  It serves a few
 122          * purposes:
 123          *   1) If $target is a Title, the correct URL to link to will be figured
 124          *      out automatically.
 125          *   2) It automatically adds the usual classes for various types of link
 126          *      targets: "new" for red links, "stub" for short articles, etc.
 127          *   3) It escapes all attribute values safely so there's no risk of XSS.
 128          *   4) It provides a default tooltip if the target is a Title (the page
 129          *      name of the target).
 130          * link() replaces the old functions in the makeLink() family.
 131          *
 132          * @param $target        Title  Can currently only be a Title, but this may
 133          *   change to support Images, literal URLs, etc.
 134          * @param $text          string The HTML contents of the <a> element, i.e.,
 135          *   the link text.  This is raw HTML and will not be escaped.  If null,
 136          *   defaults to the prefixed text of the Title; or if the Title is just a
 137          *   fragment, the contents of the fragment.
 138          * @param $customAttribs array  A key => value array of extra HTML attri-
 139          *   butes, such as title and class.  (href is ignored.)  Classes will be
 140          *   merged with the default classes, while other attributes will replace
 141          *   default attributes.  All passed attribute values will be HTML-escaped.
 142          *   A false attribute value means to suppress that attribute.
 143          * @param $query         array  The query string to append to the URL
 144          *   you're linking to, in key => value array form.  Query keys and values
 145          *   will be URL-encoded.
 146          * @param $options       mixed  String or array of strings:
 147          *     'known': Page is known to exist, so don't check if it does.
 148          *     'broken': Page is known not to exist, so don't check if it does.
 149          *     'noclasses': Don't add any classes automatically (includes "new",
 150          *       "stub", "mw-redirect", "extiw").  Only use the class attribute
 151          *       provided, if any, so you get a simple blue link with no funny i-
 152          *       cons.
 153          *     'forcearticlepath': Use the article path always, even with a querystring.
 154          *       Has compatibility issues on some setups, so avoid wherever possible.
 155          * @return string HTML <a> attribute
 156          */
 157         public static function link(
 158                 $target, $text = null, $customAttribs = array(), $query = array(), $options = array()
 159         ) {
 160                 wfProfileIn( __METHOD__ );
 161                 if ( !$target instanceof Title ) {
 162                         wfProfileOut( __METHOD__ );
 163                         return "<!-- ERROR -->$text";
 164                 }
 165                 $options = (array)$options;
 166
 167                 $dummy = new DummyLinker; // dummy linker instance for bc on the hooks
 168
 169                 $ret = null;
 170                 if ( !wfRunHooks( 'LinkBegin', array( $dummy, $target, &$text,
 171                 &$customAttribs, &$query, &$options, &$ret ) ) ) {
 172                         wfProfileOut( __METHOD__ );
 173                         return $ret;
 174                 }
 175
 176                 # Normalize the Title if it's a special page
 177                 $target = self::normaliseSpecialPage( $target );
 178
 179                 # If we don't know whether the page exists, let's find out.
 180                 wfProfileIn( __METHOD__ . '-checkPageExistence' );
 181                 if ( !in_array( 'known', $options ) and !in_array( 'broken', $options ) ) {
 182                         if ( $target->isKnown() ) {
 183                                 $options[] = 'known';
 184                         } else {
 185                                 $options[] = 'broken';
 186                         }
 187                 }
 188                 wfProfileOut( __METHOD__ . '-checkPageExistence' );
 189
 190                 $oldquery = array();
 191                 if ( in_array( "forcearticlepath", $options ) && $query ) {
 192                         $oldquery = $query;
 193                         $query = array();
 194                 }
 195
 196                 # Note: we want the href attribute first, for prettiness.
 197                 $attribs = array( 'href' => self::linkUrl( $target, $query, $options ) );
 198                 if ( in_array( 'forcearticlepath', $options ) && $oldquery ) {
 199                         $attribs['href'] = wfAppendQuery( $attribs['href'], wfArrayToCgi( $oldquery ) );
 200                 }
 201
 202                 $attribs = array_merge(
 203                         $attribs,
 204                         self::linkAttribs( $target, $customAttribs, $options, $text )
 205                 );
 206                 if ( is_null( $text ) ) {
 207                         $text = self::linkText( $target );
 208                 }
 209
 210                 $ret = null;
 211                 if ( wfRunHooks( 'LinkEnd', array( $dummy, $target, $options, &$text, &$attribs, &$ret ) ) ) {
 212                         $ret = Html::rawElement( 'a', $attribs, $text );
 213                 }
 214
 215                 wfProfileOut( __METHOD__ );
 216                 return $ret;
 217         }
 218
 219         /**
 220          * Identical to link(), except $options defaults to 'known'.
 221          */
 222         public static function linkKnown(
 223                 $target, $text = null, $customAttribs = array(),
 224                 $query = array(), $options = array( 'known', 'noclasses' ) )
 225         {
 226                 return self::link( $target, $text, $customAttribs, $query, $options );
 227         }
 228
 229         /**
 230          * Returns the Url used to link to a Title
 231          *
 232          * @param $target Title
 233          */
 234         private static function linkUrl( $target, $query, $options ) {
 235                 wfProfileIn( __METHOD__ );
 236                 # We don't want to include fragments for broken links, because they
 237                 # generally make no sense.
 238                 if ( in_array( 'broken', $options ) && $target->mFragment !== '' ) {
 239                         $target = clone $target;
 240                         $target->mFragment = '';
 241                 }
 242
 243                 # If it's a broken link, add the appropriate query pieces, unless
 244                 # there's already an action specified, or unless 'edit' makes no sense
 245                 # (i.e., for a nonexistent special page).
 246                 if ( in_array( 'broken', $options ) && empty( $query['action'] )
 247                         && $target->getNamespace() != NS_SPECIAL ) {
 248                         $query['action'] = 'edit';
 249                         $query['redlink'] = '1';
 250                 }
 251                 $ret = $target->getLinkUrl( $query );
 252                 wfProfileOut( __METHOD__ );
 253                 return $ret;
 254         }
 255
 256         /**
 257          * Returns the array of attributes used when linking to the Title $target
 258          *
 259          * @param $target Title
 260          */
 261         private static function linkAttribs( $target, $attribs, $options, $linkText ) {
 262                 wfProfileIn( __METHOD__ );
 263                 global $wgUser;
 264                 $defaults = array();
 265
 266                 if ( !in_array( 'noclasses', $options ) ) {
 267                         wfProfileIn( __METHOD__ . '-getClasses' );
 268                         # Now build the classes.
 269                         $classes = array();
 270
 271                         if ( in_array( 'broken', $options ) ) {
 272                                 $classes[] = 'new';
 273                         }
 274
 275                         if ( $target->isExternal() ) {
 276                                 $classes[] = 'extiw';
 277                         }
 278
 279                         if ( !in_array( 'broken', $options ) ) { # Avoid useless calls to LinkCache (see r50387)
 280                                 $colour = self::getLinkColour( $target, $wgUser->getStubThreshold() );
 281                                 if ( $colour !== '' ) {
 282                                         $classes[] = $colour; # mw-redirect or stub
 283                                 }
 284                         }
 285                         if ( $classes != array() ) {
 286                                 $defaults['class'] = implode( ' ', $classes );
 287                         }
 288                         wfProfileOut( __METHOD__ . '-getClasses' );
 289                 }
 290
 291                 # Get a default title attribute.
 292                 global $wgLang;
 293                 $known = in_array( 'known', $options );
 294                 if ( $target->getPrefixedText() == '' ) {
 295                         # A link like [[#Foo]].  This used to mean an empty title
 296                         # attribute, but that's silly.  Just don't output a title.
 297                 } elseif ( $known &&
 298                         $wgLang->caseFold($linkText) !== $wgLang->caseFold($target->getPrefixedText() ) )
 299                 {
 300                         $defaults['title'] = $target->getPrefixedText();
 301                 } elseif ( !$known ) {
 302                         $defaults['title'] = wfMsg( 'red-link-title', $target->getPrefixedText() );
 303                 }
 304
 305                 # Finally, merge the custom attribs with the default ones, and iterate
 306                 # over that, deleting all "false" attributes.
 307                 $ret = array();
 308                 $merged = Sanitizer::mergeAttributes( $defaults, $attribs );
 309                 foreach ( $merged as $key => $val ) {
 310                         # A false value suppresses the attribute, and we don't want the
 311                         # href attribute to be overridden.
 312                         if ( $key != 'href' and $val !== false ) {
 313                                 $ret[$key] = $val;
 314                         }
 315                 }
 316                 wfProfileOut( __METHOD__ );
 317                 return $ret;
 318         }
 319
 320         /**
 321          * Default text of the links to the Title $target
 322          *
 323          * @param $target Title
 324          */
 325         private static function linkText( $target ) {
 326                 # We might be passed a non-Title by make*LinkObj().  Fail gracefully.
 327                 if ( !$target instanceof Title ) {
 328                         return '';
 329                 }
 330
 331                 # If the target is just a fragment, with no title, we return the frag-
 332                 # ment text.  Otherwise, we return the title text itself.
 333                 if ( $target->getPrefixedText() === '' && $target->getFragment() !== '' ) {
 334                         return htmlspecialchars( $target->getFragment() );
 335                 }
 336                 return htmlspecialchars( $target->getPrefixedText() );
 337         }
 338
 339         /**
 340          * Generate either a normal exists-style link or a stub link, depending
 341          * on the given page size.
 342          *
 343          * @param $size Integer
 344          * @param $nt Title object.
 345          * @param $text String
 346          * @param $query String
 347          * @param $trail String
 348          * @param $prefix String
 349          * @return string HTML of link
 350          * @deprecated since 1.17
 351          */
 352         static function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 353                 global $wgUser;
 354                 wfDeprecated( __METHOD__ );
 355
 356                 $threshold = $wgUser->getStubThreshold();
 357                 $colour = ( $size < $threshold ) ? 'stub' : '';
 358                 // FIXME: replace deprecated makeColouredLinkObj by link()
 359                 return self::makeColouredLinkObj( $nt, $colour, $text, $query, $trail, $prefix );
 360         }
 361
 362         /**
 363          * Make appropriate markup for a link to the current article. This is currently rendered
 364          * as the bold link text. The calling sequence is the same as the other make*LinkObj static functions,
 365          * despite $query not being used.
 366          *
 367          * @param $nt Title
 368          */
 369         static function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 370                 if ( $text == '' ) {
 371                         $text = htmlspecialchars( $nt->getPrefixedText() );
 372                 }
 373                 list( $inside, $trail ) = self::splitTrail( $trail );
 374                 return "<strong class=\"selflink\">{$prefix}{$text}{$inside}</strong>{$trail}";
 375         }
 376
 377         static function normaliseSpecialPage( Title $title ) {
 378                 if ( $title->getNamespace() == NS_SPECIAL ) {
 379                         list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 380                         if ( !$name ) {
 381                                 return $title;
 382                         }
 383                         $ret = SpecialPage::getTitleFor( $name, $subpage );
 384                         $ret->mFragment = $title->getFragment();
 385                         return $ret;
 386                 } else {
 387                         return $title;
 388                 }
 389         }
 390
 391         /**
 392          * Returns the filename part of an url.
 393          * Used as alternative text for external images.
 394          */
 395         static function fnamePart( $url ) {
 396                 $basename = strrchr( $url, '/' );
 397                 if ( false === $basename ) {
 398                         $basename = $url;
 399                 } else {
 400                         $basename = substr( $basename, 1 );
 401                 }
 402                 return $basename;
 403         }
 404
 405         /**
 406          * Return the code for images which were added via external links,
 407          * via Parser::maybeMakeExternalImage().
 408          */
 409         static function makeExternalImage( $url, $alt = '' ) {
 410                 if ( $alt == '' ) {
 411                         $alt = self::fnamePart( $url );
 412                 }
 413                 $img = '';
 414                 $success = wfRunHooks( 'LinkerMakeExternalImage', array( &$url, &$alt, &$img ) );
 415                 if ( !$success ) {
 416                         wfDebug( "Hook LinkerMakeExternalImage changed the output of external image with url {$url} and alt text {$alt} to {$img}\n", true );
 417                         return $img;
 418                 }
 419                 return Html::element( 'img',
 420                         array(
 421                                 'src' => $url,
 422                                 'alt' => $alt ) );
 423         }
 424
 425         /**
 426          * Given parameters derived from [[Image:Foo|options...]], generate the
 427          * HTML that that syntax inserts in the page.
 428          *
 429          * @param $title Title object
 430          * @param $file File object, or false if it doesn't exist
 431          * @param $frameParams Array: associative array of parameters external to the media handler.
 432          *     Boolean parameters are indicated by presence or absence, the value is arbitrary and
 433          *     will often be false.
 434          *          thumbnail       If present, downscale and frame
 435          *          manualthumb     Image name to use as a thumbnail, instead of automatic scaling
 436          *          framed          Shows image in original size in a frame
 437          *          frameless       Downscale but don't frame
 438          *          upright         If present, tweak default sizes for portrait orientation
 439          *          upright_factor  Fudge factor for "upright" tweak (default 0.75)
 440          *          border          If present, show a border around the image
 441          *          align           Horizontal alignment (left, right, center, none)
 442          *          valign          Vertical alignment (baseline, sub, super, top, text-top, middle,
 443          *                          bottom, text-bottom)
 444          *          alt             Alternate text for image (i.e. alt attribute). Plain text.
 445          *          caption         HTML for image caption.
 446          *          link-url        URL to link to
 447          *          link-title      Title object to link to
 448          *          link-target     Value for the target attribue, only with link-url
 449          *          no-link         Boolean, suppress description link
 450          *
 451          * @param $handlerParams Array: associative array of media handler parameters, to be passed
 452          *       to transform(). Typical keys are "width" and "page".
 453          * @param $time String: timestamp of the file, set as false for current
 454          * @param $query String: query params for desc url
 455          * @param $widthOption: Used by the parser to remember the user preference thumbnailsize
 456          * @return String: HTML for an image, with links, wrappers, etc.
 457          */
 458         static function makeImageLink2( Title $title, $file, $frameParams = array(),
 459                 $handlerParams = array(), $time = false, $query = "", $widthOption = null )
 460         {
 461                 $res = null;
 462                 $dummy = new DummyLinker;
 463                 if ( !wfRunHooks( 'ImageBeforeProduceHTML', array( &$dummy, &$title,
 464                         &$file, &$frameParams, &$handlerParams, &$time, &$res ) ) ) {
 465                         return $res;
 466                 }
 467
 468                 if ( $file && !$file->allowInlineDisplay() ) {
 469                         wfDebug( __METHOD__ . ': ' . $title->getPrefixedDBkey() . " does not allow inline display\n" );
 470                         return self::link( $title );
 471                 }
 472
 473                 // Shortcuts
 474                 $fp =& $frameParams;
 475                 $hp =& $handlerParams;
 476
 477                 // Clean up parameters
 478                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 479                 if ( !isset( $fp['align'] ) ) {
 480                         $fp['align'] = '';
 481                 }
 482                 if ( !isset( $fp['alt'] ) ) {
 483                         $fp['alt'] = '';
 484                 }
 485                 if ( !isset( $fp['title'] ) ) {
 486                         $fp['title'] = '';
 487                 }
 488
 489                 $prefix = $postfix = '';
 490
 491                 if ( 'center' == $fp['align'] ) {
 492                         $prefix  = '<div class="center">';
 493                         $postfix = '</div>';
 494                         $fp['align']   = 'none';
 495                 }
 496                 if ( $file && !isset( $hp['width'] ) ) {
 497                         $hp['width'] = $file->getWidth( $page );
 498
 499                         if ( isset( $fp['thumbnail'] ) || isset( $fp['framed'] ) || isset( $fp['frameless'] ) || !$hp['width'] ) {
 500                                 global $wgThumbLimits, $wgThumbUpright;
 501                                 if ( !isset( $widthOption ) || !isset( $wgThumbLimits[$widthOption] ) ) {
 502                                         $widthOption = User::getDefaultOption( 'thumbsize' );
 503                                 }
 504
 505                                 // Reduce width for upright images when parameter 'upright' is used
 506                                 if ( isset( $fp['upright'] ) && $fp['upright'] == 0 ) {
 507                                         $fp['upright'] = $wgThumbUpright;
 508                                 }
 509                                 // 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
 510                                 $prefWidth = isset( $fp['upright'] ) ?
 511                                         round( $wgThumbLimits[$widthOption] * $fp['upright'], -1 ) :
 512                                         $wgThumbLimits[$widthOption];
 513
 514                                 // Use width which is smaller: real image width or user preference width
 515                                 // Unless image is scalable vector.
 516                                 if ( !isset( $hp['height'] ) && ( $hp['width'] <= 0 ||
 517                                                 $prefWidth < $hp['width'] || $file->isVectorized() ) ) {
 518                                         $hp['width'] = $prefWidth;
 519                                 }
 520                         }
 521                 }
 522
 523                 if ( isset( $fp['thumbnail'] ) || isset( $fp['manualthumb'] ) || isset( $fp['framed'] ) ) {
 524                         global $wgContLang;
 525                         # Create a thumbnail. Alignment depends on language
 526                         # writing direction, # right aligned for left-to-right-
 527                         # languages ("Western languages"), left-aligned
 528                         # for right-to-left-languages ("Semitic languages")
 529                         #
 530                         # If  thumbnail width has not been provided, it is set
 531                         # to the default user option as specified in Language*.php
 532                         if ( $fp['align'] == '' ) {
 533                                 $fp['align'] = $wgContLang->alignEnd();
 534                         }
 535                         return $prefix . self::makeThumbLink2( $title, $file, $fp, $hp, $time, $query ) . $postfix;
 536                 }
 537
 538                 if ( $file && isset( $fp['frameless'] ) ) {
 539                         $srcWidth = $file->getWidth( $page );
 540                         # For "frameless" option: do not present an image bigger than the source (for bitmap-style images)
 541                         # This is the same behaviour as the "thumb" option does it already.
 542                         if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 543                                 $hp['width'] = $srcWidth;
 544                         }
 545                 }
 546
 547                 if ( $file && isset( $hp['width'] ) ) {
 548                         # Create a resized image, without the additional thumbnail features
 549                         $thumb = $file->transform( $hp );
 550                 } else {
 551                         $thumb = false;
 552                 }
 553
 554                 if ( !$thumb ) {
 555                         $s = self::makeBrokenImageLinkObj( $title, $fp['title'], '', '', '', $time == true );
 556                 } else {
 557                         $params = array(
 558                                 'alt' => $fp['alt'],
 559                                 'title' => $fp['title'],
 560                                 'valign' => isset( $fp['valign'] ) ? $fp['valign'] : false ,
 561                                 'img-class' => isset( $fp['border'] ) ? 'thumbborder' : false );
 562                         $params = self::getImageLinkMTOParams( $fp, $query ) + $params;
 563
 564                         $s = $thumb->toHtml( $params );
 565                 }
 566                 if ( $fp['align'] != '' ) {
 567                         $s = "<div class=\"float{$fp['align']}\">{$s}</div>";
 568                 }
 569                 return str_replace( "\n", ' ', $prefix . $s . $postfix );
 570         }
 571
 572         /**
 573          * Get the link parameters for MediaTransformOutput::toHtml() from given
 574          * frame parameters supplied by the Parser.
 575          * @param $frameParams The frame parameters
 576          * @param $query An optional query string to add to description page links
 577          */
 578         static function getImageLinkMTOParams( $frameParams, $query = '' ) {
 579                 $mtoParams = array();
 580                 if ( isset( $frameParams['link-url'] ) && $frameParams['link-url'] !== '' ) {
 581                         $mtoParams['custom-url-link'] = $frameParams['link-url'];
 582                         if ( isset( $frameParams['link-target'] ) ) {
 583                                 $mtoParams['custom-target-link'] = $frameParams['link-target'];
 584                         }
 585                 } elseif ( isset( $frameParams['link-title'] ) && $frameParams['link-title'] !== '' ) {
 586                         $mtoParams['custom-title-link'] = self::normaliseSpecialPage( $frameParams['link-title'] );
 587                 } elseif ( !empty( $frameParams['no-link'] ) ) {
 588                         // No link
 589                 } else {
 590                         $mtoParams['desc-link'] = true;
 591                         $mtoParams['desc-query'] = $query;
 592                 }
 593                 return $mtoParams;
 594         }
 595
 596         /**
 597          * Make HTML for a thumbnail including image, border and caption
 598          * @param $title Title object
 599          * @param $file File object or false if it doesn't exist
 600          * @param $label String
 601          * @param $alt String
 602          * @param $align String
 603          * @param $params Array
 604          * @param $framed Boolean
 605          * @param $manualthumb String
 606          */
 607         static function makeThumbLinkObj( Title $title, $file, $label = '', $alt,
 608                 $align = 'right', $params = array(), $framed = false , $manualthumb = "" )
 609         {
 610                 $frameParams = array(
 611                         'alt' => $alt,
 612                         'caption' => $label,
 613                         'align' => $align
 614                 );
 615                 if ( $framed ) {
 616                         $frameParams['framed'] = true;
 617                 }
 618                 if ( $manualthumb ) {
 619                         $frameParams['manualthumb'] = $manualthumb;
 620                 }
 621                 return self::makeThumbLink2( $title, $file, $frameParams, $params );
 622         }
 623
 624         /**
 625          * @param $title Title
 626          * @param  $file File
 627          * @param array $frameParams
 628          * @param array $handlerParams
 629          * @param bool $time
 630          * @param string $query
 631          * @return mixed
 632          */
 633         static function makeThumbLink2( Title $title, $file, $frameParams = array(),
 634                 $handlerParams = array(), $time = false, $query = "" )
 635         {
 636                 global $wgStylePath;
 637                 $exists = $file && $file->exists();
 638
 639                 # Shortcuts
 640                 $fp =& $frameParams;
 641                 $hp =& $handlerParams;
 642
 643                 $page = isset( $hp['page'] ) ? $hp['page'] : false;
 644                 if ( !isset( $fp['align'] ) ) $fp['align'] = 'right';
 645                 if ( !isset( $fp['alt'] ) ) $fp['alt'] = '';
 646                 if ( !isset( $fp['title'] ) ) $fp['title'] = '';
 647                 if ( !isset( $fp['caption'] ) ) $fp['caption'] = '';
 648
 649                 if ( empty( $hp['width'] ) ) {
 650                         // Reduce width for upright images when parameter 'upright' is used
 651                         $hp['width'] = isset( $fp['upright'] ) ? 130 : 180;
 652                 }
 653                 $thumb = false;
 654
 655                 if ( !$exists ) {
 656                         $outerWidth = $hp['width'] + 2;
 657                 } else {
 658                         if ( isset( $fp['manualthumb'] ) ) {
 659                                 # Use manually specified thumbnail
 660                                 $manual_title = Title::makeTitleSafe( NS_FILE, $fp['manualthumb'] );
 661                                 if ( $manual_title ) {
 662                                         $manual_img = wfFindFile( $manual_title );
 663                                         if ( $manual_img ) {
 664                                                 $thumb = $manual_img->getUnscaledThumb( $hp );
 665                                         } else {
 666                                                 $exists = false;
 667                                         }
 668                                 }
 669                         } elseif ( isset( $fp['framed'] ) ) {
 670                                 // Use image dimensions, don't scale
 671                                 $thumb = $file->getUnscaledThumb( $hp );
 672                         } else {
 673                                 # Do not present an image bigger than the source, for bitmap-style images
 674                                 # This is a hack to maintain compatibility with arbitrary pre-1.10 behaviour
 675                                 $srcWidth = $file->getWidth( $page );
 676                                 if ( $srcWidth && !$file->mustRender() && $hp['width'] > $srcWidth ) {
 677                                         $hp['width'] = $srcWidth;
 678                                 }
 679                                 $thumb = $file->transform( $hp );
 680                         }
 681
 682                         if ( $thumb ) {
 683                                 $outerWidth = $thumb->getWidth() + 2;
 684                         } else {
 685                                 $outerWidth = $hp['width'] + 2;
 686                         }
 687                 }
 688
 689                 # ThumbnailImage::toHtml() already adds page= onto the end of DjVu URLs
 690                 # So we don't need to pass it here in $query. However, the URL for the
 691                 # zoom icon still needs it, so we make a unique query for it. See bug 14771
 692                 $url = $title->getLocalURL( $query );
 693                 if ( $page ) {
 694                         $url = wfAppendQuery( $url, 'page=' . urlencode( $page ) );
 695                 }
 696
 697                 $s = "<div class=\"thumb t{$fp['align']}\"><div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";
 698                 if ( !$exists ) {
 699                         $s .= self::makeBrokenImageLinkObj( $title, $fp['title'], '', '', '', $time == true );
 700                         $zoomIcon = '';
 701                 } elseif ( !$thumb ) {
 702                         $s .= htmlspecialchars( wfMsg( 'thumbnail_error', '' ) );
 703                         $zoomIcon = '';
 704                 } else {
 705                         $params = array(
 706                                 'alt' => $fp['alt'],
 707                                 'title' => $fp['title'],
 708                                 'img-class' => 'thumbimage' );
 709                         $params = self::getImageLinkMTOParams( $fp, $query ) + $params;
 710                         $s .= $thumb->toHtml( $params );
 711                         if ( isset( $fp['framed'] ) ) {
 712                                 $zoomIcon = "";
 713                         } else {
 714                                 $zoomIcon =  '<div class="magnify">' .
 715                                         '<a href="' . htmlspecialchars( $url ) . '" class="internal" ' .
 716                                                 'title="' . htmlspecialchars( wfMsg( 'thumbnail-more' ) ) . '">' .
 717                                         '<img src="' . htmlspecialchars( $wgStylePath ) . '/common/images/magnify-clip.png" ' .
 718                                                 'width="15" height="11" alt="" /></a></div>';
 719                         }
 720                 }
 721                 $s .= '  <div class="thumbcaption">' . $zoomIcon . $fp['caption'] . "</div></div></div>";
 722                 return str_replace( "\n", ' ', $s );
 723         }
 724
 725         /**
 726          * Make a "broken" link to an image
 727          *
 728          * @param $title Title object
 729          * @param $text String: link label in unescaped text form
 730          * @param $query String: query string
 731          * @param $trail String: link trail (HTML fragment)
 732          * @param $prefix String: link prefix (HTML fragment)
 733          * @param $time Boolean: a file of a certain timestamp was requested
 734          * @return String
 735          */
 736         public static function makeBrokenImageLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '', $time = false ) {
 737                 global $wgEnableUploads, $wgUploadMissingFileUrl;
 738                 if ( $title instanceof Title ) {
 739                         wfProfileIn( __METHOD__ );
 740                         $currentExists = $time ? ( wfFindFile( $title ) != false ) : false;
 741
 742                         list( $inside, $trail ) = self::splitTrail( $trail );
 743                         if ( $text == '' )
 744                                 $text = htmlspecialchars( $title->getPrefixedText() );
 745
 746                         if ( ( $wgUploadMissingFileUrl || $wgEnableUploads ) && !$currentExists ) {
 747                                 $redir = RepoGroup::singleton()->getLocalRepo()->checkRedirect( $title );
 748
 749                                 if ( $redir ) {
 750                                         wfProfileOut( __METHOD__ );
 751                                         return self::linkKnown( $title, "$prefix$text$inside", array(), $query ) . $trail;
 752                                 }
 753
 754                                 $href = self::getUploadUrl( $title, $query );
 755
 756                                 wfProfileOut( __METHOD__ );
 757                                 return '<a href="' . htmlspecialchars( $href ) . '" class="new" title="' .
 758                                         htmlspecialchars( $title->getPrefixedText(), ENT_QUOTES ) . '">' .
 759                                         "$prefix$text$inside</a>$trail";
 760                         } else {
 761                                 wfProfileOut( __METHOD__ );
 762                                 return self::linkKnown( $title, "$prefix$text$inside", array(), $query ) . $trail;
 763                         }
 764                 } else {
 765                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 766                 }
 767         }
 768
 769         /**
 770          * Get the URL to upload a certain file
 771          *
 772          * @param $destFile Title object of the file to upload
 773          * @param $query String: urlencoded query string to prepend
 774          * @return String: urlencoded URL
 775          */
 776         protected static function getUploadUrl( $destFile, $query = '' ) {
 777                 global $wgUploadMissingFileUrl;
 778                 $q = 'wpDestFile=' . $destFile->getPartialUrl();
 779                 if ( $query != '' )
 780                         $q .= '&' . $query;
 781
 782                 if ( $wgUploadMissingFileUrl ) {
 783                         return wfAppendQuery( $wgUploadMissingFileUrl, $q );
 784                 } else {
 785                         $upload = SpecialPage::getTitleFor( 'Upload' );
 786                         return $upload->getLocalUrl( $q );
 787                 }
 788         }
 789
 790         /**
 791          * Create a direct link to a given uploaded file.
 792          *
 793          * @param $title Title object.
 794          * @param $text String: pre-sanitized HTML
 795          * @param $time string: MW timestamp of file creation time
 796          * @return String: HTML
 797          */
 798         public static function makeMediaLinkObj( $title, $text = '', $time = false ) {
 799                 $img = wfFindFile( $title, array( 'time' => $time ) );
 800                 return self::makeMediaLinkFile( $title, $img, $text );
 801         }
 802
 803         /**
 804          * Create a direct link to a given uploaded file.
 805          * This will make a broken link if $file is false.
 806          *
 807          * @param $title Title object.
 808          * @param $file mixed File object or false
 809          * @param $text String: pre-sanitized HTML
 810          * @return String: HTML
 811          *
 812          * @todo Handle invalid or missing images better.
 813          */
 814         public static function makeMediaLinkFile( Title $title, $file, $text = '' ) {
 815                 if ( $file && $file->exists() ) {
 816                         $url = $file->getURL();
 817                         $class = 'internal';
 818                 } else {
 819                         $url = self::getUploadUrl( $title );
 820                         $class = 'new';
 821                 }
 822                 $alt = htmlspecialchars( $title->getText(), ENT_QUOTES );
 823                 if ( $text == '' ) {
 824                         $text = $alt;
 825                 }
 826                 $u = htmlspecialchars( $url );
 827                 return "<a href=\"{$u}\" class=\"$class\" title=\"{$alt}\">{$text}</a>";
 828         }
 829
 830         /**
 831          *  Make a link to a special page given its name and, optionally,
 832          * a message key from the link text.
 833          * Usage example: $skin->specialLink( 'recentchanges' )
 834          */
 835         static function specialLink( $name, $key = '' ) {
 836                 if ( $key == '' ) { $key = strtolower( $name ); }
 837
 838                 return self::linkKnown( SpecialPage::getTitleFor( $name ) , wfMsg( $key ) );
 839         }
 840
 841         /**
 842          * Make an external link
 843          * @param $url String: URL to link to
 844          * @param $text String: text of link
 845          * @param $escape Boolean: do we escape the link text?
 846          * @param $linktype String: type of external link. Gets added to the classes
 847          * @param $attribs Array of extra attributes to <a>
 848          */
 849         static function makeExternalLink( $url, $text, $escape = true, $linktype = '', $attribs = array() ) {
 850                 $class = "external";
 851                 if ( isset($linktype) && $linktype ) {
 852                         $class .= " $linktype";
 853                 }
 854                 if ( isset($attribs['class']) && $attribs['class'] ) {
 855                         $class .= " {$attribs['class']}";
 856                 }
 857                 $attribs['class'] = $class;
 858
 859                 if ( $escape ) {
 860                         $text = htmlspecialchars( $text );
 861                 }
 862                 $link = '';
 863                 $success = wfRunHooks( 'LinkerMakeExternalLink',
 864                         array( &$url, &$text, &$link, &$attribs, $linktype ) );
 865                 if ( !$success ) {
 866                         wfDebug( "Hook LinkerMakeExternalLink changed the output of link with url {$url} and text {$text} to {$link}\n", true );
 867                         return $link;
 868                 }
 869                 $attribs['href'] = $url;
 870                 return Html::rawElement( 'a', $attribs, $text );
 871         }
 872
 873         /**
 874          * Make user link (or user contributions for unregistered users)
 875          * @param $userId   Integer: user id in database.
 876          * @param $userText String: user name in database
 877          * @return String: HTML fragment
 878          * @private
 879          */
 880         static function userLink( $userId, $userText ) {
 881                 if ( $userId == 0 ) {
 882                         $page = SpecialPage::getTitleFor( 'Contributions', $userText );
 883                 } else {
 884                         $page = Title::makeTitle( NS_USER, $userText );
 885                 }
 886                 return self::link( $page, htmlspecialchars( $userText ), array( 'class' => 'mw-userlink' ) );
 887         }
 888
 889         /**
 890          * Generate standard user tool links (talk, contributions, block link, etc.)
 891          *
 892          * @param $userId Integer: user identifier
 893          * @param $userText String: user name or IP address
 894          * @param $redContribsWhenNoEdits Boolean: should the contributions link be
 895          *        red if the user has no edits?
 896          * @param $flags Integer: customisation flags (e.g. Linker::TOOL_LINKS_NOBLOCK)
 897          * @param $edits Integer: user edit count (optional, for performance)
 898          * @return String: HTML fragment
 899          */
 900         public static function userToolLinks(
 901                 $userId, $userText, $redContribsWhenNoEdits = false, $flags = 0, $edits = null
 902         ) {
 903                 global $wgUser, $wgDisableAnonTalk, $wgLang;
 904                 $talkable = !( $wgDisableAnonTalk && 0 == $userId );
 905                 $blockable = !$flags & self::TOOL_LINKS_NOBLOCK;
 906
 907                 $items = array();
 908                 if ( $talkable ) {
 909                         $items[] = self::userTalkLink( $userId, $userText );
 910                 }
 911                 if ( $userId ) {
 912                         // check if the user has an edit
 913                         $attribs = array();
 914                         if ( $redContribsWhenNoEdits ) {
 915                                 $count = !is_null( $edits ) ? $edits : User::edits( $userId );
 916                                 if ( $count == 0 ) {
 917                                         $attribs['class'] = 'new';
 918                                 }
 919                         }
 920                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $userText );
 921
 922                         $items[] = self::link( $contribsPage, wfMsgHtml( 'contribslink' ), $attribs );
 923                 }
 924                 if ( $blockable && $wgUser->isAllowed( 'block' ) ) {
 925                         $items[] = self::blockLink( $userId, $userText );
 926                 }
 927
 928                 if ( $items ) {
 929                         return ' <span class="mw-usertoollinks">(' . $wgLang->pipeList( $items ) . ')</span>';
 930                 } else {
 931                         return '';
 932                 }
 933         }
 934
 935         /**
 936          * Alias for userToolLinks( $userId, $userText, true );
 937          * @param $userId Integer: user identifier
 938          * @param $userText String: user name or IP address
 939          * @param $edits Integer: user edit count (optional, for performance)
 940          */
 941         public static function userToolLinksRedContribs( $userId, $userText, $edits = null ) {
 942                 return self::userToolLinks( $userId, $userText, true, 0, $edits );
 943         }
 944
 945
 946         /**
 947          * @param $userId Integer: user id in database.
 948          * @param $userText String: user name in database.
 949          * @return String: HTML fragment with user talk link
 950          * @private
 951          */
 952         static function userTalkLink( $userId, $userText ) {
 953                 $userTalkPage = Title::makeTitle( NS_USER_TALK, $userText );
 954                 $userTalkLink = self::link( $userTalkPage, wfMsgHtml( 'talkpagelinktext' ) );
 955                 return $userTalkLink;
 956         }
 957
 958         /**
 959          * @param $userId Integer: userid
 960          * @param $userText String: user name in database.
 961          * @return String: HTML fragment with block link
 962          * @private
 963          */
 964         static function blockLink( $userId, $userText ) {
 965                 $blockPage = SpecialPage::getTitleFor( 'Block', $userText );
 966                 $blockLink = self::link( $blockPage, wfMsgHtml( 'blocklink' ) );
 967                 return $blockLink;
 968         }
 969
 970         /**
 971          * Generate a user link if the current user is allowed to view it
 972          * @param $rev Revision object.
 973          * @param $isPublic Boolean: show only if all users can see it
 974          * @return String: HTML fragment
 975          */
 976         static function revUserLink( $rev, $isPublic = false ) {
 977                 if ( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
 978                         $link = wfMsgHtml( 'rev-deleted-user' );
 979                 } else if ( $rev->userCan( Revision::DELETED_USER ) ) {
 980                         $link = self::userLink( $rev->getUser( Revision::FOR_THIS_USER ),
 981                                 $rev->getUserText( Revision::FOR_THIS_USER ) );
 982                 } else {
 983                         $link = wfMsgHtml( 'rev-deleted-user' );
 984                 }
 985                 if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
 986                         return '<span class="history-deleted">' . $link . '</span>';
 987                 }
 988                 return $link;
 989         }
 990
 991         /**
 992          * Generate a user tool link cluster if the current user is allowed to view it
 993          * @param $rev Revision object.
 994          * @param $isPublic Boolean: show only if all users can see it
 995          * @return string HTML
 996          */
 997         static function revUserTools( $rev, $isPublic = false ) {
 998                 if ( $rev->isDeleted( Revision::DELETED_USER ) && $isPublic ) {
 999                         $link = wfMsgHtml( 'rev-deleted-user' );
1000                 } else if ( $rev->userCan( Revision::DELETED_USER ) ) {
1001                         $userId = $rev->getUser( Revision::FOR_THIS_USER );
1002                         $userText = $rev->getUserText( Revision::FOR_THIS_USER );
1003                         $link = self::userLink( $userId, $userText ) .
1004                                 ' ' . self::userToolLinks( $userId, $userText );
1005                 } else {
1006                         $link = wfMsgHtml( 'rev-deleted-user' );
1007                 }
1008                 if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
1009                         return ' <span class="history-deleted">' . $link . '</span>';
1010                 }
1011                 return $link;
1012         }
1013
1014         /**
1015          * This function is called by all recent changes variants, by the page history,
1016          * and by the user contributions list. It is responsible for formatting edit
1017          * comments. It escapes any HTML in the comment, but adds some CSS to format
1018          * auto-generated comments (from section editing) and formats [[wikilinks]].
1019          *
1020          * @author Erik Moeller <moeller@scireview.de>
1021          *
1022          * Note: there's not always a title to pass to this function.
1023          * Since you can't set a default parameter for a reference, I've turned it
1024          * temporarily to a value pass. Should be adjusted further. --brion
1025          *
1026          * @param $comment String
1027          * @param $title Mixed: Title object (to generate link to the section in autocomment) or null
1028          * @param $local Boolean: whether section links should refer to local page
1029          */
1030         static function formatComment( $comment, $title = null, $local = false ) {
1031                 wfProfileIn( __METHOD__ );
1032
1033                 # Sanitize text a bit:
1034                 $comment = str_replace( "\n", " ", $comment );
1035                 # Allow HTML entities (for bug 13815)
1036                 $comment = Sanitizer::escapeHtmlAllowEntities( $comment );
1037
1038                 # Render autocomments and make links:
1039                 $comment = self::formatAutocomments( $comment, $title, $local );
1040                 $comment = self::formatLinksInComment( $comment, $title, $local );
1041
1042                 wfProfileOut( __METHOD__ );
1043                 return $comment;
1044         }
1045
1046         static $autocommentTitle;
1047         static $autocommentLocal;
1048
1049         /**
1050          * The pattern for autogen comments is / * foo * /, which makes for
1051          * some nasty regex.
1052          * We look for all comments, match any text before and after the comment,
1053          * add a separator where needed and format the comment itself with CSS
1054          * Called by Linker::formatComment.
1055          *
1056          * @param $comment String: comment text
1057          * @param $title An optional title object used to links to sections
1058          * @param $local Boolean: whether section links should refer to local page
1059          * @return String: formatted comment
1060          */
1061         private static function formatAutocomments( $comment, $title = null, $local = false ) {
1062                 // Bah!
1063                 self::$autocommentTitle = $title;
1064                 self::$autocommentLocal = $local;
1065                 $comment = preg_replace_callback(
1066                         '!(.*)/\*\s*(.*?)\s*\*/(.*)!',
1067                         array( 'Linker', 'formatAutocommentsCallback' ),
1068                         $comment );
1069                 self::$autocommentTitle = null;
1070                 self::$autocommentLocal = null;
1071                 return $comment;
1072         }
1073
1074         private static function formatAutocommentsCallback( $match ) {
1075                 $title = self::$autocommentTitle;
1076                 $local = self::$autocommentLocal;
1077
1078                 $pre = $match[1];
1079                 $auto = $match[2];
1080                 $post = $match[3];
1081                 $link = '';
1082                 if ( $title ) {
1083                         $section = $auto;
1084
1085                         # Remove links that a user may have manually put in the autosummary
1086                         # This could be improved by copying as much of Parser::stripSectionName as desired.
1087                         $section = str_replace( '[[:', '', $section );
1088                         $section = str_replace( '[[', '', $section );
1089                         $section = str_replace( ']]', '', $section );
1090
1091                         $section = Sanitizer::normalizeSectionNameWhitespace( $section ); # bug 22784
1092                         if ( $local ) {
1093                                 $sectionTitle = Title::newFromText( '#' . $section );
1094                         } else {
1095                                 $sectionTitle = Title::makeTitleSafe( $title->getNamespace(),
1096                                         $title->getDBkey(), $section );
1097                         }
1098                         if ( $sectionTitle ) {
1099                                 $link = self::link( $sectionTitle,
1100                                         htmlspecialchars( wfMsgForContent( 'sectionlink' ) ), array(), array(),
1101                                         'noclasses' );
1102                         } else {
1103                                 $link = '';
1104                         }
1105                 }
1106                 $auto = "$link$auto";
1107                 if ( $pre ) {
1108                         # written summary $presep autocomment (summary /* section */)
1109                         $auto = wfMsgExt( 'autocomment-prefix', array( 'escapenoentities', 'content' ) ) . $auto;
1110                 }
1111                 if ( $post ) {
1112                         # autocomment $postsep written summary (/* section */ summary)
1113                         $auto .= wfMsgExt( 'colon-separator', array( 'escapenoentities', 'content' ) );
1114                 }
1115                 $auto = '<span class="autocomment">' . $auto . '</span>';
1116                 $comment = $pre . $auto . $post;
1117                 return $comment;
1118         }
1119
1120         static $commentContextTitle;
1121         static $commentLocal;
1122
1123         /**
1124          * Formats wiki links and media links in text; all other wiki formatting
1125          * is ignored
1126          *
1127          * @todo Fixme: doesn't handle sub-links as in image thumb texts like the main parser
1128          * @param $comment String: text to format links in
1129          * @param $title An optional title object used to links to sections
1130          * @param $local Boolean: whether section links should refer to local page
1131          * @return String
1132          */
1133         public static function formatLinksInComment( $comment, $title = null, $local = false ) {
1134                 self::$commentContextTitle = $title;
1135                 self::$commentLocal = $local;
1136                 $html = preg_replace_callback(
1137                         '/\[\[:?(.*?)(\|(.*?))*\]\]([^[]*)/',
1138                         array( 'Linker', 'formatLinksInCommentCallback' ),
1139                         $comment );
1140                 self::$commentContextTitle = null;
1141                 self::$commentLocal = null;
1142                 return $html;
1143         }
1144
1145         protected static function formatLinksInCommentCallback( $match ) {
1146                 global $wgContLang;
1147
1148                 $medians = '(?:' . preg_quote( MWNamespace::getCanonicalName( NS_MEDIA ), '/' ) . '|';
1149                 $medians .= preg_quote( $wgContLang->getNsText( NS_MEDIA ), '/' ) . '):';
1150
1151                 $comment = $match[0];
1152
1153                 # fix up urlencoded title texts (copied from Parser::replaceInternalLinks)
1154                 if ( strpos( $match[1], '%' ) !== false ) {
1155                         $match[1] = str_replace( array( '<', '>' ), array( '&lt;', '&gt;' ), rawurldecode( $match[1] ) );
1156                 }
1157
1158                 # Handle link renaming [[foo|text]] will show link as "text"
1159                 if ( $match[3] != "" ) {
1160                         $text = $match[3];
1161                 } else {
1162                         $text = $match[1];
1163                 }
1164                 $submatch = array();
1165                 $thelink = null;
1166                 if ( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
1167                         # Media link; trail not supported.
1168                         $linkRegexp = '/\[\[(.*?)\]\]/';
1169                         $title = Title::makeTitleSafe( NS_FILE, $submatch[1] );
1170                         $thelink = self::makeMediaLinkObj( $title, $text );
1171                 } else {
1172                         # Other kind of link
1173                         if ( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
1174                                 $trail = $submatch[1];
1175                         } else {
1176                                 $trail = "";
1177                         }
1178                         $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
1179                         if ( isset( $match[1][0] ) && $match[1][0] == ':' )
1180                                 $match[1] = substr( $match[1], 1 );
1181                         list( $inside, $trail ) = self::splitTrail( $trail );
1182
1183                         $linkText = $text;
1184                         $linkTarget = self::normalizeSubpageLink( self::$commentContextTitle,
1185                                 $match[1], $linkText );
1186
1187                         $target = Title::newFromText( $linkTarget );
1188                         if ( $target ) {
1189                                 if ( $target->getText() == '' && $target->getInterwiki() === ''
1190                                         && !self::$commentLocal && self::$commentContextTitle )
1191                                 {
1192                                         $newTarget = clone ( self::$commentContextTitle );
1193                                         $newTarget->setFragment( '#' . $target->getFragment() );
1194                                         $target = $newTarget;
1195                                 }
1196                                 $thelink = self::link(
1197                                         $target,
1198                                         $linkText . $inside
1199                                 ) . $trail;
1200                         }
1201                 }
1202                 if ( $thelink ) {
1203                         // If the link is still valid, go ahead and replace it in!
1204                         $comment = preg_replace( $linkRegexp, StringUtils::escapeRegexReplacement( $thelink ), $comment, 1 );
1205                 }
1206
1207                 return $comment;
1208         }
1209
1210         /**
1211          * @param $contextTitle Title
1212          * @param  $target
1213          * @param  $text
1214          * @return string
1215          */
1216         static function normalizeSubpageLink( $contextTitle, $target, &$text ) {
1217                 # Valid link forms:
1218                 # Foobar -- normal
1219                 # :Foobar -- override special treatment of prefix (images, language links)
1220                 # /Foobar -- convert to CurrentPage/Foobar
1221                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1222                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1223                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1224
1225                 wfProfileIn( __METHOD__ );
1226                 $ret = $target; # default return value is no change
1227
1228                 # Some namespaces don't allow subpages,
1229                 # so only perform processing if subpages are allowed
1230                 if ( $contextTitle && MWNamespace::hasSubpages( $contextTitle->getNamespace() ) ) {
1231                         $hash = strpos( $target, '#' );
1232                         if ( $hash !== false ) {
1233                                 $suffix = substr( $target, $hash );
1234                                 $target = substr( $target, 0, $hash );
1235                         } else {
1236                                 $suffix = '';
1237                         }
1238                         # bug 7425
1239                         $target = trim( $target );
1240                         # Look at the first character
1241                         if ( $target != '' && $target { 0 } === '/' ) {
1242                                 # / at end means we don't want the slash to be shown
1243                                 $m = array();
1244                                 $trailingSlashes = preg_match_all( '%(/+)$%', $target, $m );
1245                                 if ( $trailingSlashes ) {
1246                                         $noslash = $target = substr( $target, 1, -strlen( $m[0][0] ) );
1247                                 } else {
1248                                         $noslash = substr( $target, 1 );
1249                                 }
1250
1251                                 $ret = $contextTitle->getPrefixedText() . '/' . trim( $noslash ) . $suffix;
1252                                 if ( $text === '' ) {
1253                                         $text = $target . $suffix;
1254                                 } # this might be changed for ugliness reasons
1255                         } else {
1256                                 # check for .. subpage backlinks
1257                                 $dotdotcount = 0;
1258                                 $nodotdot = $target;
1259                                 while ( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1260                                         ++$dotdotcount;
1261                                         $nodotdot = substr( $nodotdot, 3 );
1262                                 }
1263                                 if ( $dotdotcount > 0 ) {
1264                                         $exploded = explode( '/', $contextTitle->GetPrefixedText() );
1265                                         if ( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1266                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1267                                                 # / at the end means don't show full path
1268                                                 if ( substr( $nodotdot, -1, 1 ) === '/' ) {
1269                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1270                                                         if ( $text === '' ) {
1271                                                                 $text = $nodotdot . $suffix;
1272                                                         }
1273                                                 }
1274                                                 $nodotdot = trim( $nodotdot );
1275                                                 if ( $nodotdot != '' ) {
1276                                                         $ret .= '/' . $nodotdot;
1277                                                 }
1278                                                 $ret .= $suffix;
1279                                         }
1280                                 }
1281                         }
1282                 }
1283
1284                 wfProfileOut( __METHOD__ );
1285                 return $ret;
1286         }
1287
1288         /**
1289          * Wrap a comment in standard punctuation and formatting if
1290          * it's non-empty, otherwise return empty string.
1291          *
1292          * @param $comment String
1293          * @param $title Mixed: Title object (to generate link to section in autocomment) or null
1294          * @param $local Boolean: whether section links should refer to local page
1295          * @param $embraced Boolean: whether the formatted comment should be embraced with ()
1296          * @return string
1297          */
1298         static function commentBlock( $comment, $title = null, $local = false, $embraced = true ) {
1299                 // '*' used to be the comment inserted by the software way back
1300                 // in antiquity in case none was provided, here for backwards
1301                 // compatability, acc. to brion -ævar
1302                 if ( $comment == '' || $comment == '*' ) {
1303                         return '';
1304                 } else {
1305                         $formatted = self::formatComment( $comment, $title, $local );
1306                         if ( $embraced ) {
1307                                 $formatted = wfMessage( 'parentheses', $formatted );
1308                         }
1309                         return Html::rawElement( 'span', array( 'class' => 'comment' ), $formatted );
1310                 }
1311         }
1312
1313         /**
1314          * Wrap and format the given revision's comment block, if the current
1315          * user is allowed to view it.
1316          *
1317          * @param $rev Revision object
1318          * @param $local Boolean: whether section links should refer to local page
1319          * @param $isPublic Boolean: show only if all users can see it
1320          * @return String: HTML fragment
1321          */
1322         static function revComment( Revision $rev, $local = false, $isPublic = false ) {
1323                 if ( $rev->getRawComment() == "" ) {
1324                         return "";
1325                 }
1326                 if ( $rev->isDeleted( Revision::DELETED_COMMENT ) && $isPublic ) {
1327                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1328                 } else if ( $rev->userCan( Revision::DELETED_COMMENT ) ) {
1329                         $block = self::commentBlock( $rev->getComment( Revision::FOR_THIS_USER ),
1330                                 $rev->getTitle(), $local );
1331                 } else {
1332                         $block = " <span class=\"comment\">" . wfMsgHtml( 'rev-deleted-comment' ) . "</span>";
1333                 }
1334                 if ( $rev->isDeleted( Revision::DELETED_COMMENT ) ) {
1335                         return " <span class=\"history-deleted\">$block</span>";
1336                 }
1337                 return $block;
1338         }
1339
1340         public static function formatRevisionSize( $size ) {
1341                 if ( $size == 0 ) {
1342                         $stxt = wfMsgExt( 'historyempty', 'parsemag' );
1343                 } else {
1344                         global $wgLang;
1345                         $stxt = wfMsgExt( 'nbytes', 'parsemag', $wgLang->formatNum( $size ) );
1346                         $stxt = "($stxt)";
1347                 }
1348                 $stxt = htmlspecialchars( $stxt );
1349                 return "<span class=\"history-size\">$stxt</span>";
1350         }
1351
1352         /**
1353          * Add another level to the Table of Contents
1354          */
1355         static function tocIndent() {
1356                 return "\n<ul>";
1357         }
1358
1359         /**
1360          * Finish one or more sublevels on the Table of Contents
1361          */
1362         static function tocUnindent( $level ) {
1363                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level > 0 ? $level : 0 );
1364         }
1365
1366         /**
1367          * parameter level defines if we are on an indentation level
1368          */
1369         static function tocLine( $anchor, $tocline, $tocnumber, $level, $sectionIndex = false ) {
1370                 $classes = "toclevel-$level";
1371                 if ( $sectionIndex !== false )
1372                         $classes .= " tocsection-$sectionIndex";
1373                 return "\n<li class=\"$classes\"><a href=\"#" .
1374                         $anchor . '"><span class="tocnumber">' .
1375                         $tocnumber . '</span> <span class="toctext">' .
1376                         $tocline . '</span></a>';
1377         }
1378
1379         /**
1380          * End a Table Of Contents line.
1381          * tocUnindent() will be used instead if we're ending a line below
1382          * the new level.
1383          */
1384         static function tocLineEnd() {
1385                 return "</li>\n";
1386         }
1387
1388         /**
1389          * Wraps the TOC in a table and provides the hide/collapse javascript.
1390          *
1391          * @param $toc String: html of the Table Of Contents
1392          * @param $lang mixed: Language code for the toc title
1393          * @return String: full html of the TOC
1394          */
1395         static function tocList( $toc, $lang = false ) {
1396                 $title = wfMsgExt( 'toc', array( 'language' => $lang, 'escape' ) );
1397                 return
1398                    '<table id="toc" class="toc"><tr><td>'
1399                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
1400                  . $toc
1401                  . "</ul>\n</td></tr></table>\n";
1402         }
1403
1404         /**
1405          * Generate a table of contents from a section tree
1406          * Currently unused.
1407          *
1408          * @param $tree Return value of ParserOutput::getSections()
1409          * @return String: HTML fragment
1410          */
1411         public static function generateTOC( $tree ) {
1412                 $toc = '';
1413                 $lastLevel = 0;
1414                 foreach ( $tree as $section ) {
1415                         if ( $section['toclevel'] > $lastLevel )
1416                                 $toc .= self::tocIndent();
1417                         else if ( $section['toclevel'] < $lastLevel )
1418                                 $toc .= self::tocUnindent(
1419                                         $lastLevel - $section['toclevel'] );
1420                         else
1421                                 $toc .= self::tocLineEnd();
1422
1423                         $toc .= self::tocLine( $section['anchor'],
1424                                 $section['line'], $section['number'],
1425                                 $section['toclevel'], $section['index'] );
1426                         $lastLevel = $section['toclevel'];
1427                 }
1428                 $toc .= self::tocLineEnd();
1429                 return self::tocList( $toc );
1430         }
1431
1432         /**
1433          * Create a headline for content
1434          *
1435          * @param $level Integer: the level of the headline (1-6)
1436          * @param $attribs String: any attributes for the headline, starting with
1437          *                 a space and ending with '>'
1438          *                 This *must* be at least '>' for no attribs
1439          * @param $anchor String: the anchor to give the headline (the bit after the #)
1440          * @param $text String: the text of the header
1441          * @param $link String: HTML to add for the section edit link
1442          * @param $legacyAnchor Mixed: a second, optional anchor to give for
1443          *   backward compatibility (false to omit)
1444          *
1445          * @return String: HTML headline
1446          */
1447         public static function makeHeadline( $level, $attribs, $anchor, $text, $link, $legacyAnchor = false ) {
1448                 $ret = "<h$level$attribs"
1449                         . $link
1450                         . " <span class=\"mw-headline\" id=\"$anchor\">$text</span>"
1451                         . "</h$level>";
1452                 if ( $legacyAnchor !== false ) {
1453                         $ret = "<div id=\"$legacyAnchor\"></div>$ret";
1454                 }
1455                 return $ret;
1456         }
1457
1458         /**
1459          * Split a link trail, return the "inside" portion and the remainder of the trail
1460          * as a two-element array
1461          */
1462         static function splitTrail( $trail ) {
1463                 global $wgContLang;
1464                 $regex = $wgContLang->linkTrail();
1465                 $inside = '';
1466                 if ( $trail !== '' ) {
1467                         $m = array();
1468                         if ( preg_match( $regex, $trail, $m ) ) {
1469                                 $inside = $m[1];
1470                                 $trail = $m[2];
1471                         }
1472                 }
1473                 return array( $inside, $trail );
1474         }
1475
1476         /**
1477          * Generate a rollback link for a given revision.  Currently it's the
1478          * caller's responsibility to ensure that the revision is the top one. If
1479          * it's not, of course, the user will get an error message.
1480          *
1481          * If the calling page is called with the parameter &bot=1, all rollback
1482          * links also get that parameter. It causes the edit itself and the rollback
1483          * to be marked as "bot" edits. Bot edits are hidden by default from recent
1484          * changes, so this allows sysops to combat a busy vandal without bothering
1485          * other users.
1486          *
1487          * @param $rev Revision object
1488          */
1489         static function generateRollback( $rev ) {
1490                 return '<span class="mw-rollback-link">['
1491                         . self::buildRollbackLink( $rev )
1492                         . ']</span>';
1493         }
1494
1495         /**
1496          * Build a raw rollback link, useful for collections of "tool" links
1497          *
1498          * @param $rev Revision object
1499          * @return String: HTML fragment
1500          */
1501         public static function buildRollbackLink( $rev ) {
1502                 global $wgRequest, $wgUser;
1503                 $title = $rev->getTitle();
1504                 $query = array(
1505                         'action' => 'rollback',
1506                         'from' => $rev->getUserText(),
1507                         'token' => $wgUser->editToken( array( $title->getPrefixedText(), $rev->getUserText() ) ),
1508                 );
1509                 if ( $wgRequest->getBool( 'bot' ) ) {
1510                         $query['bot'] = '1';
1511                         $query['hidediff'] = '1'; // bug 15999
1512                 }
1513                 return self::link(
1514                         $title,
1515                         wfMsgHtml( 'rollbacklink' ),
1516                         array( 'title' => wfMsg( 'tooltip-rollback' ) ),
1517                         $query,
1518                         array( 'known', 'noclasses' )
1519                 );
1520         }
1521
1522         /**
1523          * Returns HTML for the "templates used on this page" list.
1524          *
1525          * @param $templates Array of templates from Article::getUsedTemplate
1526          * or similar
1527          * @param $preview Boolean: whether this is for a preview
1528          * @param $section Boolean: whether this is for a section edit
1529          * @return String: HTML output
1530          */
1531         public static function formatTemplates( $templates, $preview = false, $section = false ) {
1532                 wfProfileIn( __METHOD__ );
1533
1534                 $outText = '';
1535                 if ( count( $templates ) > 0 ) {
1536                         # Do a batch existence check
1537                         $batch = new LinkBatch;
1538                         foreach ( $templates as $title ) {
1539                                 $batch->addObj( $title );
1540                         }
1541                         $batch->execute();
1542
1543                         # Construct the HTML
1544                         $outText = '<div class="mw-templatesUsedExplanation">';
1545                         if ( $preview ) {
1546                                 $outText .= wfMsgExt( 'templatesusedpreview', array( 'parse' ), count( $templates ) );
1547                         } elseif ( $section ) {
1548                                 $outText .= wfMsgExt( 'templatesusedsection', array( 'parse' ), count( $templates ) );
1549                         } else {
1550                                 $outText .= wfMsgExt( 'templatesused', array( 'parse' ), count( $templates ) );
1551                         }
1552                         $outText .= "</div><ul>\n";
1553
1554                         usort( $templates, array( 'Title', 'compare' ) );
1555                         foreach ( $templates as $titleObj ) {
1556                                 $r = $titleObj->getRestrictions( 'edit' );
1557                                 if ( in_array( 'sysop', $r ) ) {
1558                                         $protected = wfMsgExt( 'template-protected', array( 'parseinline' ) );
1559                                 } elseif ( in_array( 'autoconfirmed', $r ) ) {
1560                                         $protected = wfMsgExt( 'template-semiprotected', array( 'parseinline' ) );
1561                                 } else {
1562                                         $protected = '';
1563                                 }
1564                                 if ( $titleObj->quickUserCan( 'edit' ) ) {
1565                                         $editLink = self::link(
1566                                                 $titleObj,
1567                                                 wfMsg( 'editlink' ),
1568                                                 array(),
1569                                                 array( 'action' => 'edit' )
1570                                         );
1571                                 } else {
1572                                         $editLink = self::link(
1573                                                 $titleObj,
1574                                                 wfMsg( 'viewsourcelink' ),
1575                                                 array(),
1576                                                 array( 'action' => 'edit' )
1577                                         );
1578                                 }
1579                                 $outText .= '<li>' . self::link( $titleObj ) . ' (' . $editLink . ') ' . $protected . '</li>';
1580                         }
1581                         $outText .= '</ul>';
1582                 }
1583                 wfProfileOut( __METHOD__  );
1584                 return $outText;
1585         }
1586
1587         /**
1588          * Returns HTML for the "hidden categories on this page" list.
1589          *
1590          * @param $hiddencats Array of hidden categories from Article::getHiddenCategories
1591          * or similar
1592          * @return String: HTML output
1593          */
1594         public static function formatHiddenCategories( $hiddencats ) {
1595                 global $wgLang;
1596                 wfProfileIn( __METHOD__ );
1597
1598                 $outText = '';
1599                 if ( count( $hiddencats ) > 0 ) {
1600                         # Construct the HTML
1601                         $outText = '<div class="mw-hiddenCategoriesExplanation">';
1602                         $outText .= wfMsgExt( 'hiddencategories', array( 'parse' ), $wgLang->formatnum( count( $hiddencats ) ) );
1603                         $outText .= "</div><ul>\n";
1604
1605                         foreach ( $hiddencats as $titleObj ) {
1606                                 $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
1607                         }
1608                         $outText .= '</ul>';
1609                 }
1610                 wfProfileOut( __METHOD__  );
1611                 return $outText;
1612         }
1613
1614         /**
1615          * Format a size in bytes for output, using an appropriate
1616          * unit (B, KB, MB or GB) according to the magnitude in question
1617          *
1618          * @param $size Size to format
1619          * @return String
1620          */
1621         public static function formatSize( $size ) {
1622                 global $wgLang;
1623                 return htmlspecialchars( $wgLang->formatSize( $size ) );
1624         }
1625
1626         /**
1627          * Given the id of an interface element, constructs the appropriate title
1628          * attribute from the system messages.  (Note, this is usually the id but
1629          * isn't always, because sometimes the accesskey needs to go on a different
1630          * element than the id, for reverse-compatibility, etc.)
1631          *
1632          * @param $name String: id of the element, minus prefixes.
1633          * @param $options Mixed: null or the string 'withaccess' to add an access-
1634          *   key hint
1635          * @return String: contents of the title attribute (which you must HTML-
1636          *   escape), or false for no title attribute
1637          */
1638         public static function titleAttrib( $name, $options = null ) {
1639                 wfProfileIn( __METHOD__ );
1640
1641                 $message = wfMessage( "tooltip-$name" );
1642
1643                 if ( !$message->exists() ) {
1644                         $tooltip = false;
1645                 } else {
1646                         $tooltip = $message->text();
1647                         # Compatibility: formerly some tooltips had [alt-.] hardcoded
1648                         $tooltip = preg_replace( "/ ?\[alt-.\]$/", '', $tooltip );
1649                         # Message equal to '-' means suppress it.
1650                         if (  $tooltip == '-' ) {
1651                                 $tooltip = false;
1652                         }
1653                 }
1654
1655                 if ( $options == 'withaccess' ) {
1656                         $accesskey = self::accesskey( $name );
1657                         if ( $accesskey !== false ) {
1658                                 if ( $tooltip === false || $tooltip === '' ) {
1659                                         $tooltip = "[$accesskey]";
1660                                 } else {
1661                                         $tooltip .= " [$accesskey]";
1662                                 }
1663                         }
1664                 }
1665
1666                 wfProfileOut( __METHOD__ );
1667                 return $tooltip;
1668         }
1669
1670         static $accesskeycache;
1671
1672         /**
1673          * Given the id of an interface element, constructs the appropriate
1674          * accesskey attribute from the system messages.  (Note, this is usually
1675          * the id but isn't always, because sometimes the accesskey needs to go on
1676          * a different element than the id, for reverse-compatibility, etc.)
1677          *
1678          * @param $name String: id of the element, minus prefixes.
1679          * @return String: contents of the accesskey attribute (which you must HTML-
1680          *   escape), or false for no accesskey attribute
1681          */
1682         public static function accesskey( $name ) {
1683                 if ( isset( self::$accesskeycache[$name] ) ) {
1684                         return self::$accesskeycache[$name];
1685                 }
1686                 wfProfileIn( __METHOD__ );
1687
1688                 $message = wfMessage( "accesskey-$name" );
1689
1690                 if ( !$message->exists() ) {
1691                         $accesskey = false;
1692                 } else {
1693                         $accesskey = $message->plain();
1694                         if ( $accesskey === '' || $accesskey === '-' ) {
1695                                 # FIXME: Per standard MW behavior, a value of '-' means to suppress the
1696                                 # attribute, but this is broken for accesskey: that might be a useful
1697                                 # value.
1698                                 $accesskey = false;
1699                         }
1700                 }
1701
1702                 wfProfileOut( __METHOD__ );
1703                 return self::$accesskeycache[$name] = $accesskey;
1704         }
1705
1706         /**
1707          * Creates a (show/hide) link for deleting revisions/log entries
1708          *
1709          * @param $query Array: query parameters to be passed to link()
1710          * @param $restricted Boolean: set to true to use a <strong> instead of a <span>
1711          * @param $delete Boolean: set to true to use (show/hide) rather than (show)
1712          *
1713          * @return String: HTML <a> link to Special:Revisiondelete, wrapped in a
1714          * span to allow for customization of appearance with CSS
1715          */
1716         public static function revDeleteLink( $query = array(), $restricted = false, $delete = true ) {
1717                 $sp = SpecialPage::getTitleFor( 'Revisiondelete' );
1718                 $text = $delete ? wfMsgHtml( 'rev-delundel' ) : wfMsgHtml( 'rev-showdeleted' );
1719                 $tag = $restricted ? 'strong' : 'span';
1720                 $link = self::link( $sp, $text, array(), $query, array( 'known', 'noclasses' ) );
1721                 return Xml::tags( $tag, array( 'class' => 'mw-revdelundel-link' ), "($link)" );
1722         }
1723
1724         /**
1725          * Creates a dead (show/hide) link for deleting revisions/log entries
1726          *
1727          * @param $delete Boolean: set to true to use (show/hide) rather than (show)
1728          *
1729          * @return string HTML text wrapped in a span to allow for customization
1730          * of appearance with CSS
1731          */
1732         public static function revDeleteLinkDisabled( $delete = true ) {
1733                 $text = $delete ? wfMsgHtml( 'rev-delundel' ) : wfMsgHtml( 'rev-showdeleted' );
1734                 return Xml::tags( 'span', array( 'class' => 'mw-revdelundel-link' ), "($text)" );
1735         }
1736
1737         /* Deprecated methods */
1738
1739         /**
1740          * @deprecated since 1.16 Use link()
1741          *
1742          * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
1743          * it if you already have a title object handy. See makeLinkObj for further documentation.
1744          *
1745          * @param $title String: the text of the title
1746          * @param $text  String: link text
1747          * @param $query String: optional query part
1748          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1749          *                      be included in the link text. Other characters will be appended after
1750          *                      the end of the link.
1751          */
1752         static function makeLink( $title, $text = '', $query = '', $trail = '' ) {
1753                 wfProfileIn( __METHOD__ );
1754                 $nt = Title::newFromText( $title );
1755                 if ( $nt instanceof Title ) {
1756                         $result = self::makeLinkObj( $nt, $text, $query, $trail );
1757                 } else {
1758                         wfDebug( 'Invalid title passed to self::makeLink(): "' . $title . "\"\n" );
1759                         $result = $text == "" ? $title : $text;
1760                 }
1761
1762                 wfProfileOut( __METHOD__ );
1763                 return $result;
1764         }
1765
1766         /**
1767          * @deprecated since 1.16 Use link()
1768          *
1769          * This function is a shortcut to makeKnownLinkObj(Title::newFromText($title),...). Do not call
1770          * it if you already have a title object handy. See makeKnownLinkObj for further documentation.
1771          *
1772          * @param $title String: the text of the title
1773          * @param $text  String: link text
1774          * @param $query String: optional query part
1775          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1776          *                      be included in the link text. Other characters will be appended after
1777          *                      the end of the link.
1778          * @param $prefix String: Optional prefix
1779          * @param $aprops String: extra attributes to the a-element
1780          */
1781         static function makeKnownLink(
1782                 $title, $text = '', $query = '', $trail = '', $prefix = '', $aprops = ''
1783         ) {
1784                 $nt = Title::newFromText( $title );
1785                 if ( $nt instanceof Title ) {
1786                         return self::makeKnownLinkObj( $nt, $text, $query, $trail, $prefix , $aprops );
1787                 } else {
1788                         wfDebug( 'Invalid title passed to self::makeKnownLink(): "' . $title . "\"\n" );
1789                         return $text == '' ? $title : $text;
1790                 }
1791         }
1792
1793         /**
1794          * @deprecated since 1.16 Use link()
1795          *
1796          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
1797          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
1798          *
1799          * @param $title String: The text of the title
1800          * @param $text String: Link text
1801          * @param $query String: Optional query part
1802          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
1803          *               be included in the link text. Other characters will be appended after
1804          *               the end of the link.
1805          */
1806         static function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
1807                 $nt = Title::newFromText( $title );
1808                 if ( $nt instanceof Title ) {
1809                         return self::makeBrokenLinkObj( $nt, $text, $query, $trail );
1810                 } else {
1811                         wfDebug( 'Invalid title passed to self::makeBrokenLink(): "' . $title . "\"\n" );
1812                         return $text == '' ? $title : $text;
1813                 }
1814         }
1815
1816         /**
1817          * @deprecated since 1.16 Use link()
1818          *
1819          * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
1820          * it if you already have a title object handy. See makeStubLinkObj for further documentation.
1821          *
1822          * @param $title String: the text of the title
1823          * @param $text  String: link text
1824          * @param $query String: optional query part
1825          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1826          *                      be included in the link text. Other characters will be appended after
1827          *                      the end of the link.
1828          */
1829         static function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
1830                 wfDeprecated( __METHOD__ );
1831                 $nt = Title::newFromText( $title );
1832                 if ( $nt instanceof Title ) {
1833                         return self::makeStubLinkObj( $nt, $text, $query, $trail );
1834                 } else {
1835                         wfDebug( 'Invalid title passed to self::makeStubLink(): "' . $title . "\"\n" );
1836                         return $text == '' ? $title : $text;
1837                 }
1838         }
1839
1840         /**
1841          * @deprecated since 1.16 Use link()
1842          *
1843          * Make a link for a title which may or may not be in the database. If you need to
1844          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
1845          * call to this will result in a DB query.
1846          *
1847          * @param $nt     Title: the title object to make the link from, e.g. from
1848          *                      Title::newFromText.
1849          * @param $text  String: link text
1850          * @param $query String: optional query part
1851          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1852          *                      be included in the link text. Other characters will be appended after
1853          *                      the end of the link.
1854          * @param $prefix String: optional prefix. As trail, only before instead of after.
1855          */
1856         static function makeLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1857                 wfProfileIn( __METHOD__ );
1858                 $query = wfCgiToArray( $query );
1859                 list( $inside, $trail ) = self::splitTrail( $trail );
1860                 if ( $text === '' ) {
1861                         $text = self::linkText( $nt );
1862                 }
1863
1864                 $ret = self::link( $nt, "$prefix$text$inside", array(), $query ) . $trail;
1865
1866                 wfProfileOut( __METHOD__ );
1867                 return $ret;
1868         }
1869
1870         /**
1871          * @deprecated since 1.16 Use link()
1872          *
1873          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
1874          * it doesn't have to do a database query. It's also valid for interwiki titles and special
1875          * pages.
1876          *
1877          * @param $title  Title object of target page
1878          * @param $text   String: text to replace the title
1879          * @param $query  String: link target
1880          * @param $trail  String: text after link
1881          * @param $prefix String: text before link text
1882          * @param $aprops String: extra attributes to the a-element
1883          * @param $style  String: style to apply - if empty, use getInternalLinkAttributesObj instead
1884          * @return the a-element
1885          */
1886         static function makeKnownLinkObj(
1887                 $title, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = ''
1888         ) {
1889                 wfProfileIn( __METHOD__ );
1890
1891                 if ( $text == '' ) {
1892                         $text = self::linkText( $title );
1893                 }
1894                 $attribs = Sanitizer::mergeAttributes(
1895                         Sanitizer::decodeTagAttributes( $aprops ),
1896                         Sanitizer::decodeTagAttributes( $style )
1897                 );
1898                 $query = wfCgiToArray( $query );
1899                 list( $inside, $trail ) = self::splitTrail( $trail );
1900
1901                 $ret = self::link( $title, "$prefix$text$inside", $attribs, $query,
1902                         array( 'known', 'noclasses' ) ) . $trail;
1903
1904                 wfProfileOut( __METHOD__ );
1905                 return $ret;
1906         }
1907
1908         /**
1909          * @deprecated since 1.16 Use link()
1910          *
1911          * Make a red link to the edit page of a given title.
1912          *
1913          * @param $title Title object of the target page
1914          * @param $text  String: Link text
1915          * @param $query String: Optional query part
1916          * @param $trail String: Optional trail. Alphabetic characters at the start of this string will
1917          *                      be included in the link text. Other characters will be appended after
1918          *                      the end of the link.
1919          * @param $prefix String: Optional prefix
1920          */
1921         static function makeBrokenLinkObj( $title, $text = '', $query = '', $trail = '', $prefix = '' ) {
1922                 wfProfileIn( __METHOD__ );
1923
1924                 list( $inside, $trail ) = self::splitTrail( $trail );
1925                 if ( $text === '' ) {
1926                         $text = self::linkText( $title );
1927                 }
1928
1929                 $ret = self::link( $title, "$prefix$text$inside", array(),
1930                         wfCgiToArray( $query ), 'broken' ) . $trail;
1931
1932                 wfProfileOut( __METHOD__ );
1933                 return $ret;
1934         }
1935
1936         /**
1937          * @deprecated since 1.16 Use link()
1938          *
1939          * Make a brown link to a short article.
1940          *
1941          * @param $nt Title object of the target page
1942          * @param $text  String: link text
1943          * @param $query String: optional query part
1944          * @param $trail String: optional trail. Alphabetic characters at the start of this string will
1945          *                      be included in the link text. Other characters will be appended after
1946          *                      the end of the link.
1947          * @param $prefix String: Optional prefix
1948          */
1949         static function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1950                 return self::makeColouredLinkObj( $nt, 'stub', $text, $query, $trail, $prefix );
1951         }
1952
1953         /**
1954          * @deprecated since 1.16 Use link()
1955          *
1956          * Make a coloured link.
1957          *
1958          * @param $nt Title object of the target page
1959          * @param $colour Integer: colour of the link
1960          * @param $text   String:  link text
1961          * @param $query  String:  optional query part
1962          * @param $trail  String:  optional trail. Alphabetic characters at the start of this string will
1963          *                      be included in the link text. Other characters will be appended after
1964          *                      the end of the link.
1965          * @param $prefix String: Optional prefix
1966          */
1967         static function makeColouredLinkObj( $nt, $colour, $text = '', $query = '', $trail = '', $prefix = '' ) {
1968                 if ( $colour != '' ) {
1969                         $style = self::getInternalLinkAttributesObj( $nt, $text, $colour );
1970                 } else {
1971                         $style = '';
1972                 }
1973                 return self::makeKnownLinkObj( $nt, $text, $query, $trail, $prefix, '', $style );
1974         }
1975
1976         /** Obsolete alias */
1977         static function makeImage( $url, $alt = '' ) {
1978                 wfDeprecated( __METHOD__ );
1979                 return self::makeExternalImage( $url, $alt );
1980         }
1981
1982         /**
1983          * Creates the HTML source for images
1984          * @deprecated since 1.16 use makeImageLink2
1985          *
1986          * @param $title Title object
1987          * @param $label String: label text
1988          * @param $alt String: alt text
1989          * @param $align String: horizontal alignment: none, left, center, right)
1990          * @param $handlerParams Array: parameters to be passed to the media handler
1991          * @param $framed Boolean: shows image in original size in a frame
1992          * @param $thumb Boolean: shows image as thumbnail in a frame
1993          * @param $manualthumb String: image name for the manual thumbnail
1994          * @param $valign String: vertical alignment: baseline, sub, super, top, text-top, middle, bottom, text-bottom
1995          * @param $time String: timestamp of the file, set as false for current
1996          * @return String
1997          */
1998         static function makeImageLinkObj( $title, $label, $alt, $align = '', $handlerParams = array(),
1999                 $framed = false, $thumb = false, $manualthumb = '', $valign = '', $time = false )
2000         {
2001                 $frameParams = array( 'alt' => $alt, 'caption' => $label );
2002                 if ( $align ) {
2003                         $frameParams['align'] = $align;
2004                 }
2005                 if ( $framed ) {
2006                         $frameParams['framed'] = true;
2007                 }
2008                 if ( $thumb ) {
2009                         $frameParams['thumbnail'] = true;
2010                 }
2011                 if ( $manualthumb ) {
2012                         $frameParams['manualthumb'] = $manualthumb;
2013                 }
2014                 if ( $valign ) {
2015                         $frameParams['valign'] = $valign;
2016                 }
2017                 $file = wfFindFile( $title, array( 'time' => $time ) );
2018                 return self::makeImageLink2( $title, $file, $frameParams, $handlerParams, $time );
2019         }
2020
2021         /** @deprecated use Linker::makeMediaLinkObj() */
2022         static function makeMediaLink( $name, $unused = '', $text = '', $time = false ) {
2023                 $nt = Title::makeTitleSafe( NS_FILE, $name );
2024                 return self::makeMediaLinkObj( $nt, $text, $time );
2025         }
2026
2027         /**
2028          * Returns the attributes for the tooltip and access key.
2029          */
2030         public static function tooltipAndAccesskeyAttribs( $name ) {
2031                 global $wgEnableTooltipsAndAccesskeys;
2032                 if ( !$wgEnableTooltipsAndAccesskeys )
2033                         return array();
2034                 # FIXME: If Sanitizer::expandAttributes() treated "false" as "output
2035                 # no attribute" instead of "output '' as value for attribute", this
2036                 # would be three lines.
2037                 $attribs = array(
2038                         'title' => self::titleAttrib( $name, 'withaccess' ),
2039                         'accesskey' => self::accesskey( $name )
2040                 );
2041                 if ( $attribs['title'] === false ) {
2042                         unset( $attribs['title'] );
2043                 }
2044                 if ( $attribs['accesskey'] === false ) {
2045                         unset( $attribs['accesskey'] );
2046                 }
2047                 return $attribs;
2048         }
2049
2050         /**
2051          * @deprecated since 1.14
2052          * Returns raw bits of HTML, use titleAttrib() and accesskey()
2053          */
2054         public static function tooltipAndAccesskey( $name ) {
2055                 return Xml::expandAttributes( self::tooltipAndAccesskeyAttribs( $name ) );
2056         }
2057
2058         /**
2059          * @deprecated since 1.14
2060          * Returns raw bits of HTML, use titleAttrib()
2061          */
2062         public static function tooltip( $name, $options = null ) {
2063                 global $wgEnableTooltipsAndAccesskeys;
2064                 if ( !$wgEnableTooltipsAndAccesskeys )
2065                         return '';
2066                 # FIXME: If Sanitizer::expandAttributes() treated "false" as "output
2067                 # no attribute" instead of "output '' as value for attribute", this
2068                 # would be two lines.
2069                 $tooltip = self::titleAttrib( $name, $options );
2070                 if ( $tooltip === false ) {
2071                         return '';
2072                 }
2073                 return Xml::expandAttributes( array(
2074                         'title' => self::titleAttrib( $name, $options )
2075                 ) );
2076         }
2077 }
2078
2079 class DummyLinker {
2080
2081         /**
2082          * Use PHP's magic __call handler to transform instance calls to a dummy instance
2083          * into static calls to the new Linker for backwards compatibility.
2084          *
2085          * @param $fname String Name of called method
2086          * @param $args Array Arguments to the method
2087          */
2088         function __call( $fname, $args ) {
2089                 return call_user_func_array( array( 'Linker', $fname ), $args );
2090         }
2091
2092 }
2093