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