includes/Linker.php

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