includes/Linker.php

   1 <?php
   2 /**
   3  * Split off some of the internal bits from Skin.php.
   4  * These functions are used for primarily page content:
   5  * links, embedded images, table of contents. Links are
   6  * also used in the skin.
   7  * @package MediaWiki
   8  */
   9
  10 /**
  11  * For the moment, Skin is a descendent class of Linker.
  12  * In the future, it should probably be further split
  13  * so that ever other bit of the wiki doesn't have to
  14  * go loading up Skin to get at it.
  15  *
  16  * @package MediaWiki
  17  */
  18 class Linker {
  19         var $linktrail ; # linktrail regexp
  20         var $postParseLinkColour = false;
  21
  22         /** @todo document */
  23         function Linker() {
  24                 global $wgContLang;
  25                 $this->linktrail = $wgContLang->linkTrail();
  26
  27                 # Cache option lookups done very frequently
  28                 $options = array( 'highlightbroken', 'hover' );
  29                 foreach( $options as $opt ) {
  30                         global $wgUser;
  31                         $this->mOptions[$opt] = $wgUser->getOption( $opt );
  32                 }
  33         }
  34
  35         /**
  36          * Get/set accessor for delayed link colouring
  37          */
  38         function postParseLinkColour( $setting = NULL ) {
  39                 return wfSetVar( $this->postParseLinkColour, $setting );
  40         }
  41
  42         /** @todo document */
  43         function getExternalLinkAttributes( $link, $text, $class='' ) {
  44                 global $wgContLang;
  45
  46                 $same = ($link == $text);
  47                 $link = urldecode( $link );
  48                 $link = $wgContLang->checkTitleEncoding( $link );
  49                 $link = preg_replace( '/[\\x00-\\x1f_]/', ' ', $link );
  50                 $link = htmlspecialchars( $link );
  51
  52                 $r = ($class != '') ? " class='$class'" : " class='external'";
  53
  54                 if( !$same && $this->mOptions['hover'] ) {
  55                         $r .= " title=\"{$link}\"";
  56                 }
  57                 return $r;
  58         }
  59
  60         /** @todo document */
  61         function getInternalLinkAttributes( $link, $text, $broken = false ) {
  62                 $link = urldecode( $link );
  63                 $link = str_replace( '_', ' ', $link );
  64                 $link = htmlspecialchars( $link );
  65
  66                 if( $broken == 'stub' ) {
  67                         $r = ' class="stub"';
  68                 } else if ( $broken == 'yes' ) {
  69                         $r = ' class="new"';
  70                 } else {
  71                         $r = '';
  72                 }
  73
  74                 if( $this->mOptions['hover'] ) {
  75                         $r .= " title=\"{$link}\"";
  76                 }
  77                 return $r;
  78         }
  79
  80         /**
  81          * @param bool $broken
  82          */
  83         function getInternalLinkAttributesObj( &$nt, $text, $broken = false ) {
  84                 if( $broken == 'stub' ) {
  85                         $r = ' class="stub"';
  86                 } else if ( $broken == 'yes' ) {
  87                         $r = ' class="new"';
  88                 } else {
  89                         $r = '';
  90                 }
  91
  92                 if( $this->mOptions['hover'] ) {
  93                         $r .= ' title="' . $nt->getEscapedText() . '"';
  94                 }
  95                 return $r;
  96         }
  97
  98         /**
  99          * Note: This function MUST call getArticleID() on the link,
 100          * otherwise the cache won't get updated properly.  See LINKCACHE.DOC.
 101          */
 102         function makeLink( $title, $text = '', $query = '', $trail = '' ) {
 103                 wfProfileIn( 'Skin::makeLink' );
 104                 $nt = Title::newFromText( $title );
 105                 if ($nt) {
 106                         $result = $this->makeLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 107                 } else {
 108                         wfDebug( 'Invalid title passed to Skin::makeLink(): "'.$title."\"\n" );
 109                         $result = $text == "" ? $title : $text;
 110                 }
 111
 112                 wfProfileOut( 'Skin::makeLink' );
 113                 return $result;
 114         }
 115
 116         /** @todo document */
 117         function makeKnownLink( $title, $text = '', $query = '', $trail = '', $prefix = '',$aprops = '') {
 118                 $nt = Title::newFromText( $title );
 119                 if ($nt) {
 120                         return $this->makeKnownLinkObj( Title::newFromText( $title ), $text, $query, $trail, $prefix , $aprops );
 121                 } else {
 122                         wfDebug( 'Invalid title passed to Skin::makeKnownLink(): "'.$title."\"\n" );
 123                         return $text == '' ? $title : $text;
 124                 }
 125         }
 126
 127         /** @todo document */
 128         function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
 129                 $nt = Title::newFromText( $title );
 130                 if ($nt) {
 131                         return $this->makeBrokenLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 132                 } else {
 133                         wfDebug( 'Invalid title passed to Skin::makeBrokenLink(): "'.$title."\"\n" );
 134                         return $text == '' ? $title : $text;
 135                 }
 136         }
 137
 138         /** @todo document */
 139         function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
 140                 $nt = Title::newFromText( $title );
 141                 if ($nt) {
 142                         return $this->makeStubLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 143                 } else {
 144                         wfDebug( 'Invalid title passed to Skin::makeStubLink(): "'.$title."\"\n" );
 145                         return $text == '' ? $title : $text;
 146                 }
 147         }
 148
 149         /**
 150          * Pass a title object, not a title string
 151          */
 152         function makeLinkObj( &$nt, $text= '', $query = '', $trail = '', $prefix = '' ) {
 153                 global $wgOut, $wgUser, $wgLinkHolders;
 154                 $fname = 'Skin::makeLinkObj';
 155                 wfProfileIn( $fname );
 156
 157                 # Fail gracefully
 158                 if ( ! isset($nt) ) {
 159                         # wfDebugDieBacktrace();
 160                         wfProfileOut( $fname );
 161                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 162                 }
 163
 164                 $ns = $nt->getNamespace();
 165                 $dbkey = $nt->getDBkey();
 166                 if ( $nt->isExternal() ) {
 167                         $u = $nt->getFullURL();
 168                         $link = $nt->getPrefixedURL();
 169                         if ( '' == $text ) { $text = $nt->getPrefixedText(); }
 170                         $style = $this->getExternalLinkAttributes( $link, $text, 'extiw' );
 171
 172                         $inside = '';
 173                         if ( '' != $trail ) {
 174                                 if ( preg_match( '/^([a-z]+)(.*)$$/sD', $trail, $m ) ) {
 175                                         $inside = $m[1];
 176                                         $trail = $m[2];
 177                                 }
 178                         }
 179                         $t = "<a href=\"{$u}\"{$style}>{$text}{$inside}</a>";
 180                         if( $this->postParseLinkColour ) {
 181                                 # There's no existence check, but this will prevent
 182                                 # interwiki links from being parsed as external links.
 183                                 global $wgInterwikiLinkHolders;
 184                                 $nr = array_push($wgInterwikiLinkHolders, $t);
 185                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
 186                         } else {
 187                                 return $t;
 188                         }
 189                 } elseif ( 0 == $ns && "" == $dbkey ) {
 190                         # A self-link with a fragment; skip existence check.
 191                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 192                 } elseif ( ( NS_SPECIAL == $ns ) || ( NS_IMAGE == $ns ) ) {
 193                         # These are always shown as existing, currently.
 194                         # Special pages don't exist in the database; images may
 195                         # occasionally be present when there is no description
 196                         # page per se, so we always shown them.
 197                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 198                 } elseif ( $this->postParseLinkColour ) {
 199                         wfProfileIn( $fname.'-postparse' );
 200                         # Insert a placeholder, and we'll work out the existence checks
 201                         # in a big lump later.
 202                         $inside = '';
 203                         if ( '' != $trail ) {
 204                                 if ( preg_match( $this->linktrail, $trail, $m ) ) {
 205                                         $inside = $m[1];
 206                                         $trail = $m[2];
 207                                 }
 208                         }
 209
 210                         # These get picked up by Parser::replaceLinkHolders()
 211                         $nr = array_push( $wgLinkHolders['namespaces'], $nt->getNamespace() );
 212                         $wgLinkHolders['dbkeys'][] = $dbkey;
 213                         $wgLinkHolders['queries'][] = $query;
 214                         $wgLinkHolders['texts'][] = $prefix.$text.$inside;
 215                         $wgLinkHolders['titles'][] =& $nt;
 216
 217                         $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
 218                         wfProfileOut( $fname.'-postparse' );
 219                 } else {
 220                         wfProfileIn( $fname.'-immediate' );
 221                         # Work out link colour immediately
 222                         $aid = $nt->getArticleID() ;
 223                         if ( 0 == $aid ) {
 224                                 $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 225                         } else {
 226                                 $threshold = $wgUser->getOption('stubthreshold') ;
 227                                 if ( $threshold > 0 ) {
 228                                         $dbr =& wfGetDB( DB_SLAVE );
 229                                         $s = $dbr->selectRow( 'cur', array( 'LENGTH(cur_text) AS x', 'cur_namespace',
 230                                                 'cur_is_redirect' ), array( 'cur_id' => $aid ), $fname ) ;
 231                                         if ( $s !== false ) {
 232                                                 $size = $s->x;
 233                                                 if ( $s->cur_is_redirect OR $s->cur_namespace != NS_MAIN ) {
 234                                                         $size = $threshold*2 ; # Really big
 235                                                 }
 236                                         } else {
 237                                                 $size = $threshold*2 ; # Really big
 238                                         }
 239                                 } else {
 240                                         $size = 1 ;
 241                                 }
 242                                 if ( $size < $threshold ) {
 243                                         $retVal = $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 244                                 } else {
 245                                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 246                                 }
 247                         }
 248                         wfProfileOut( $fname.'-immediate' );
 249                 }
 250                 wfProfileOut( $fname );
 251                 return $retVal;
 252         }
 253
 254         /**
 255          * Pass a title object, not a title string
 256          */
 257         function makeKnownLinkObj( &$nt, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '' ) {
 258                 global $wgOut, $wgTitle, $wgInputEncoding;
 259
 260                 $fname = 'Skin::makeKnownLinkObj';
 261                 wfProfileIn( $fname );
 262
 263                 if ( !is_object( $nt ) ) {
 264                         wfProfileIn( $fname );
 265                         return $text;
 266                 }
 267
 268                 $u = $nt->escapeLocalURL( $query );
 269                 if ( '' != $nt->getFragment() ) {
 270                         if( $nt->getPrefixedDbkey() == '' ) {
 271                                 $u = '';
 272                                 if ( '' == $text ) {
 273                                         $text = htmlspecialchars( $nt->getFragment() );
 274                                 }
 275                         }
 276                         $anchor = urlencode( do_html_entity_decode( str_replace(' ', '_', $nt->getFragment()), ENT_COMPAT, $wgInputEncoding ) );
 277                         $replacearray = array(
 278                                 '%3A' => ':',
 279                                 '%' => '.'
 280                         );
 281                         $u .= '#' . str_replace(array_keys($replacearray),array_values($replacearray),$anchor);
 282                 }
 283                 if ( '' == $text ) {
 284                         $text = htmlspecialchars( $nt->getPrefixedText() );
 285                 }
 286                 $style = $this->getInternalLinkAttributesObj( $nt, $text );
 287
 288                 $inside = '';
 289                 if ( '' != $trail ) {
 290                         if ( preg_match( $this->linktrail, $trail, $m ) ) {
 291                                 $inside = $m[1];
 292                                 $trail = $m[2];
 293                         }
 294                 }
 295                 $r = "<a href=\"{$u}\"{$style}{$aprops}>{$prefix}{$text}{$inside}</a>{$trail}";
 296                 wfProfileOut( $fname );
 297                 return $r;
 298         }
 299
 300         /**
 301          * Pass a title object, not a title string
 302          */
 303         function makeBrokenLinkObj( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 304                 # Fail gracefully
 305                 if ( ! isset($nt) ) {
 306                         # wfDebugDieBacktrace();
 307                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 308                 }
 309
 310                 $fname = 'Skin::makeBrokenLinkObj';
 311                 wfProfileIn( $fname );
 312
 313                 if ( '' == $query ) {
 314                         $q = 'action=edit';
 315                 } else {
 316                         $q = 'action=edit&'.$query;
 317                 }
 318                 $u = $nt->escapeLocalURL( $q );
 319
 320                 if ( '' == $text ) {
 321                         $text = htmlspecialchars( $nt->getPrefixedText() );
 322                 }
 323                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 324
 325                 $inside = '';
 326                 if ( '' != $trail ) {
 327                         if ( preg_match( $this->linktrail, $trail, $m ) ) {
 328                                 $inside = $m[1];
 329                                 $trail = $m[2];
 330                         }
 331                 }
 332                 if ( $this->mOptions['highlightbroken'] ) {
 333                         $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 334                 } else {
 335                         $s = "{$prefix}{$text}{$inside}<a href=\"{$u}\"{$style}>?</a>{$trail}";
 336                 }
 337
 338                 wfProfileOut( $fname );
 339                 return $s;
 340         }
 341
 342         /**
 343          * Pass a title object, not a title string
 344          */
 345         function makeStubLinkObj( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 346                 $link = $nt->getPrefixedURL();
 347
 348                 $u = $nt->escapeLocalURL( $query );
 349
 350                 if ( '' == $text ) {
 351                         $text = htmlspecialchars( $nt->getPrefixedText() );
 352                 }
 353                 $style = $this->getInternalLinkAttributesObj( $nt, $text, 'stub' );
 354
 355                 $inside = '';
 356                 if ( '' != $trail ) {
 357                         if ( preg_match( $this->linktrail, $trail, $m ) ) {
 358                                 $inside = $m[1];
 359                                 $trail = $m[2];
 360                         }
 361                 }
 362                 if ( $this->mOptions['highlightbroken'] ) {
 363                         $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 364                 } else {
 365                         $s = "{$prefix}{$text}{$inside}<a href=\"{$u}\"{$style}>!</a>{$trail}";
 366                 }
 367                 return $s;
 368         }
 369
 370         /** @todo document */
 371         function makeSelfLinkObj( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 372                 $u = $nt->escapeLocalURL( $query );
 373                 if ( '' == $text ) {
 374                         $text = htmlspecialchars( $nt->getPrefixedText() );
 375                 }
 376                 $inside = '';
 377                 if ( '' != $trail ) {
 378                         if ( preg_match( $this->linktrail, $trail, $m ) ) {
 379                                 $inside = $m[1];
 380                                 $trail = $m[2];
 381                         }
 382                 }
 383                 return "<strong>{$prefix}{$text}{$inside}</strong>{$trail}";
 384         }
 385
 386         /** @todo document */
 387         function fnamePart( $url ) {
 388                 $basename = strrchr( $url, '/' );
 389                 if ( false === $basename ) {
 390                         $basename = $url;
 391                 } else {
 392                         $basename = substr( $basename, 1 );
 393                 }
 394                 return htmlspecialchars( $basename );
 395         }
 396
 397         /** @todo document */
 398         function makeImage( $url, $alt = '' ) {
 399                 global $wgOut;
 400                 if ( '' == $alt ) {
 401                         $alt = $this->fnamePart( $url );
 402                 }
 403                 $s = '<img src="'.$url.'" alt="'.$alt.'" />';
 404                 return $s;
 405         }
 406
 407         /** @todo document */
 408         function makeImageLink( $name, $url, $alt = '' ) {
 409                 $nt = Title::makeTitleSafe( NS_IMAGE, $name );
 410                 return $this->makeImageLinkObj( $nt, $alt );
 411         }
 412
 413         /** @todo document */
 414         function makeImageLinkObj( $nt, $alt = '' ) {
 415                 global $wgContLang, $wgUseImageResize;
 416                 $img   = Image::newFromTitle( $nt );
 417                 $url   = $img->getViewURL();
 418
 419                 $align = '';
 420                 $prefix = $postfix = '';
 421
 422                 # Check if the alt text is of the form "options|alt text"
 423                 # Options are:
 424                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
 425                 #  * left               no resizing, just left align. label is used for alt= only
 426                 #  * right              same, but right aligned
 427                 #  * none               same, but not aligned
 428                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
 429                 #  * center             center the image
 430                 #  * framed             Keep original image size, no magnify-button.
 431
 432                 $part = explode( '|', $alt);
 433
 434                 $mwThumb  =& MagicWord::get( MAG_IMG_THUMBNAIL );
 435                 $mwLeft   =& MagicWord::get( MAG_IMG_LEFT );
 436                 $mwRight  =& MagicWord::get( MAG_IMG_RIGHT );
 437                 $mwNone   =& MagicWord::get( MAG_IMG_NONE );
 438                 $mwWidth  =& MagicWord::get( MAG_IMG_WIDTH );
 439                 $mwCenter =& MagicWord::get( MAG_IMG_CENTER );
 440                 $mwFramed =& MagicWord::get( MAG_IMG_FRAMED );
 441                 $alt = '';
 442
 443                 $height = $framed = $thumb = false;
 444                 $manual_thumb = "" ;
 445
 446                 foreach( $part as $key => $val ) {
 447                         $val_parts = explode ( "=" , $val , 2 ) ;
 448                         $left_part = array_shift ( $val_parts ) ;
 449                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
 450                                 $thumb=true;
 451                         } elseif ( $wgUseImageResize && count ( $val_parts ) == 1 && ! is_null( $mwThumb->matchVariableStartToEnd($left_part) ) ) {
 452                                 # use manually specified thumbnail
 453                                 $thumb=true;
 454                                 $manual_thumb = array_shift ( $val_parts ) ;
 455                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
 456                                 # remember to set an alignment, don't render immediately
 457                                 $align = 'right';
 458                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
 459                                 # remember to set an alignment, don't render immediately
 460                                 $align = 'left';
 461                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
 462                                 # remember to set an alignment, don't render immediately
 463                                 $align = 'center';
 464                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
 465                                 # remember to set an alignment, don't render immediately
 466                                 $align = 'none';
 467                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
 468                                 # $match is the image width in pixels
 469                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
 470                                         $width = intval( $m[1] );
 471                                         $height = intval( $m[2] );
 472                                 } else {
 473                                         $width = intval($match);
 474                                 }
 475                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
 476                                 $framed=true;
 477                         } else {
 478                                 $alt = $val;
 479                         }
 480                 }
 481                 if ( 'center' == $align )
 482                 {
 483                         $prefix  = '<div class="center">';
 484                         $postfix = '</div>';
 485                         $align   = 'none';
 486                 }
 487
 488                 if ( $thumb || $framed ) {
 489
 490                         # Create a thumbnail. Alignment depends on language
 491                         # writing direction, # right aligned for left-to-right-
 492                         # languages ("Western languages"), left-aligned
 493                         # for right-to-left-languages ("Semitic languages")
 494                         #
 495                         # If  thumbnail width has not been provided, it is set
 496                         # here to 180 pixels
 497                         if ( $align == '' ) {
 498                                 $align = $wgContLang->isRTL() ? 'left' : 'right';
 499                         }
 500                         if ( ! isset($width) ) {
 501                                 $width = 180;
 502                         }
 503                         return $prefix.$this->makeThumbLinkObj( $img, $alt, $align, $width, $height, $framed, $manual_thumb ).$postfix;
 504
 505                 } elseif ( isset($width) ) {
 506
 507                         # Create a resized image, without the additional thumbnail
 508                         # features
 509
 510                         if (    ( ! $height === false )
 511                              && ( $img->getHeight() * $width / $img->getWidth() > $height ) ) {
 512                                 $width = $img->getWidth() * $height / $img->getHeight();
 513                         }
 514                         if ( '' == $manual_thumb ) $url = $img->createThumb( $width );
 515                 }
 516
 517                 $alt = preg_replace( '/<[^>]*>/', '', $alt );
 518                 $alt = preg_replace('/&(?!:amp;|#[Xx][0-9A-fa-f]+;|#[0-9]+;|[a-zA-Z0-9]+;)/', '&amp;', $alt);
 519                 $alt = str_replace( array('<', '>', '"'), array('&lt;', '&gt;', '&quot;'), $alt );
 520
 521                 $u = $nt->escapeLocalURL();
 522                 if ( $url == '' ) {
 523                         $s = wfMsg( 'missingimage', $img->getName() );
 524                         $s .= "<br />{$alt}<br />{$url}<br />\n";
 525                 } else {
 526                         $s = '<a href="'.$u.'" class="image" title="'.$alt.'">' .
 527                                  '<img src="'.$url.'" alt="'.$alt.'" longdesc="'.$u.'" /></a>';
 528                 }
 529                 if ( '' != $align ) {
 530                         $s = "<div class=\"float{$align}\"><span>{$s}</span></div>";
 531                 }
 532                 return str_replace("\n", ' ',$prefix.$s.$postfix);
 533         }
 534
 535         /**
 536          * Make HTML for a thumbnail including image, border and caption
 537          * $img is an Image object
 538          */
 539         function makeThumbLinkObj( $img, $label = '', $align = 'right', $boxwidth = 180, $boxheight=false, $framed=false , $manual_thumb = "" ) {
 540                 global $wgStylePath, $wgContLang;
 541                 # $image = Title::makeTitleSafe( NS_IMAGE, $name );
 542                 $url  = $img->getViewURL();
 543
 544                 #$label = htmlspecialchars( $label );
 545                 $alt = preg_replace( '/<[^>]*>/', '', $label);
 546                 $alt = preg_replace('/&(?!:amp;|#[Xx][0-9A-fa-f]+;|#[0-9]+;|[a-zA-Z0-9]+;)/', '&amp;', $alt);
 547                 $alt = str_replace( array('<', '>', '"'), array('&lt;', '&gt;', '&quot;'), $alt );
 548
 549                 $width = $height = 0;
 550                 if ( $img->exists() )
 551                 {
 552                         $width  = $img->getWidth();
 553                         $height = $img->getHeight();
 554                 }
 555                 if ( 0 == $width || 0 == $height )
 556                 {
 557                         $width = $height = 200;
 558                 }
 559                 if ( $boxwidth == 0 )
 560                 {
 561                         $boxwidth = 200;
 562                 }
 563                 if ( $framed )
 564                 {
 565                         // Use image dimensions, don't scale
 566                         $boxwidth  = $width;
 567                         $oboxwidth = $boxwidth + 2;
 568                         $boxheight = $height;
 569                         $thumbUrl  = $url;
 570                 } else {
 571                         $h  = intval( $height/($width/$boxwidth) );
 572                         $oboxwidth = $boxwidth + 2;
 573                         if ( ( ! $boxheight === false ) &&  ( $h > $boxheight ) )
 574                         {
 575                                 $boxwidth *= $boxheight/$h;
 576                         } else {
 577                                 $boxheight = $h;
 578                         }
 579                         if ( '' == $manual_thumb ) $thumbUrl = $img->createThumb( $boxwidth );
 580                 }
 581
 582                 if ( $manual_thumb != '' ) # Use manually specified thumbnail
 583                 {
 584                         $manual_title = Title::makeTitleSafe( NS_IMAGE, $manual_thumb ); #new Title ( $manual_thumb ) ;
 585                         $manual_img = Image::newFromTitle( $manual_title );
 586                         $thumbUrl = $manual_img->getViewURL();
 587                         if ( $manual_img->exists() )
 588                         {
 589                                 $width  = $manual_img->getWidth();
 590                                 $height = $manual_img->getHeight();
 591                                 $boxwidth = $width ;
 592                                 $boxheight = $height ;
 593                                 $oboxwidth = $boxwidth + 2 ;
 594                         }
 595                 }
 596
 597                 $u = $img->getEscapeLocalURL();
 598
 599                 $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
 600                 $magnifyalign = $wgContLang->isRTL() ? 'left' : 'right';
 601                 $textalign = $wgContLang->isRTL() ? ' style="text-align:right"' : '';
 602
 603                 $s = "<div class=\"thumb t{$align}\"><div style=\"width:{$oboxwidth}px;\">";
 604                 if ( $thumbUrl == '' ) {
 605                         $s .= wfMsg( 'missingimage', $img->getName() );
 606                         $zoomicon = '';
 607                 } else {
 608                         $s .= '<a href="'.$u.'" class="internal" title="'.$alt.'">'.
 609                                 '<img src="'.$thumbUrl.'" alt="'.$alt.'" ' .
 610                                 'width="'.$boxwidth.'" height="'.$boxheight.'" ' .
 611                                 'longdesc="'.$u.'" /></a>';
 612                         if ( $framed ) {
 613                                 $zoomicon="";
 614                         } else {
 615                                 $zoomicon =  '<div class="magnify" style="float:'.$magnifyalign.'">'.
 616                                         '<a href="'.$u.'" class="internal" title="'.$more.'">'.
 617                                         '<img src="'.$wgStylePath.'/common/images/magnify-clip.png" ' .
 618                                         'width="15" height="11" alt="'.$more.'" /></a></div>';
 619                         }
 620                 }
 621                 $s .= '  <div class="thumbcaption" '.$textalign.'>'.$zoomicon.$label."</div></div></div>";
 622                 return str_replace("\n", ' ', $s);
 623         }
 624
 625         /** @todo document */
 626         function makeMediaLink( $name, $url, $alt = '' ) {
 627                 $nt = Title::makeTitleSafe( NS_IMAGE, $name );
 628                 return $this->makeMediaLinkObj( $nt, $alt );
 629         }
 630
 631         /** @todo document */
 632         function makeMediaLinkObj( $nt, $alt = '', $nourl=false ) {
 633                 if ( ! isset( $nt ) )
 634                 {
 635                         ### HOTFIX. Instead of breaking, return empty string.
 636                         $s = $alt;
 637                 } else {
 638                         $name = $nt->getDBKey();
 639                         $img   = Image::newFromTitle( $nt );
 640                         $url = $img->getURL();
 641                         # $nourl can be set by the parser
 642                         # this is a hack to mask absolute URLs, so the parser doesn't
 643                         # linkify them (it is currently not context-aware)
 644                         # 2004-10-25
 645                         if ($nourl) { $url=str_replace("http://","http-noparse://",$url) ; }
 646                         if ( empty( $alt ) ) {
 647                                 $alt = preg_replace( '/\.(.+?)^/', '', $name );
 648                         }
 649                         $u = htmlspecialchars( $url );
 650                         $s = "<a href=\"{$u}\" class='internal' title=\"{$alt}\">{$alt}</a>";
 651                 }
 652                 return $s;
 653         }
 654
 655         /** @todo document */
 656         function specialLink( $name, $key = '' ) {
 657                 global $wgContLang;
 658
 659                 if ( '' == $key ) { $key = strtolower( $name ); }
 660                 $pn = $wgContLang->ucfirst( $name );
 661                 return $this->makeKnownLink( $wgContLang->specialPage( $pn ),
 662                   wfMsg( $key ) );
 663         }
 664
 665         /** @todo document */
 666         function makeExternalLink( $url, $text, $escape = true, $linktype = '' ) {
 667                 $style = $this->getExternalLinkAttributes( $url, $text, 'external ' . $linktype );
 668                 global $wgNoFollowLinks;
 669                 if( $wgNoFollowLinks ) {
 670                         $style .= ' rel="nofollow"';
 671                 }
 672                 $url = htmlspecialchars( $url );
 673                 if( $escape ) {
 674                         $text = htmlspecialchars( $text );
 675                 }
 676                 return '<a href="'.$url.'"'.$style.'>'.$text.'</a>';
 677         }
 678
 679         /**
 680          * This function is called by all recent changes variants, by the page history,
 681          * and by the user contributions list. It is responsible for formatting edit
 682          * comments. It escapes any HTML in the comment, but adds some CSS to format
 683          * auto-generated comments (from section editing) and formats [[wikilinks]].
 684          *
 685          * The &$title parameter must be a title OBJECT. It is used to generate a
 686          * direct link to the section in the autocomment.
 687          * @author Erik Moeller <moeller@scireview.de>
 688          *
 689          * Note: there's not always a title to pass to this function.
 690          * Since you can't set a default parameter for a reference, I've turned it
 691          * temporarily to a value pass. Should be adjusted further. --brion
 692          */
 693         function formatComment($comment, $title = NULL) {
 694                 $fname = 'Skin::formatComment';
 695                 wfProfileIn( $fname );
 696
 697                 global $wgContLang;
 698                 $comment = htmlspecialchars( $comment );
 699
 700                 # The pattern for autogen comments is / * foo * /, which makes for
 701                 # some nasty regex.
 702                 # We look for all comments, match any text before and after the comment,
 703                 # add a separator where needed and format the comment itself with CSS
 704                 while (preg_match('/(.*)\/\*\s*(.*?)\s*\*\/(.*)/', $comment,$match)) {
 705                         $pre=$match[1];
 706                         $auto=$match[2];
 707                         $post=$match[3];
 708                         $link='';
 709                         if($title) {
 710                                 $section=$auto;
 711
 712                                 # This is hackish but should work in most cases.
 713                                 $section=str_replace('[[','',$section);
 714                                 $section=str_replace(']]','',$section);
 715                                 $title->mFragment=$section;
 716                                 $link=$this->makeKnownLinkObj($title,wfMsg('sectionlink'));
 717                         }
 718                         $sep='-';
 719                         $auto=$link.$auto;
 720                         if($pre) { $auto = $sep.' '.$auto; }
 721                         if($post) { $auto .= ' '.$sep; }
 722                         $auto='<span class="autocomment">'.$auto.'</span>';
 723                         $comment=$pre.$auto.$post;
 724                 }
 725
 726                 # format regular and media links - all other wiki formatting
 727                 # is ignored
 728                 $medians = $wgContLang->getNsText(Namespace::getMedia()).':';
 729                 while(preg_match('/\[\[(.*?)(\|(.*?))*\]\](.*)$/',$comment,$match)) {
 730                         # Handle link renaming [[foo|text]] will show link as "text"
 731                         if( "" != $match[3] ) {
 732                                 $text = $match[3];
 733                         } else {
 734                                 $text = $match[1];
 735                         }
 736                         if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
 737                                 # Media link; trail not supported.
 738                                 $linkRegexp = '/\[\[(.*?)\]\]/';
 739                                 $thelink = $this->makeMediaLink( $submatch[1], "", $text );
 740                         } else {
 741                                 # Other kind of link
 742                                 if( preg_match( wfMsgForContent( "linktrail" ), $match[4], $submatch ) ) {
 743                                         $trail = $submatch[1];
 744                                 } else {
 745                                         $trail = "";
 746                                 }
 747                                 $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
 748                                 if ($match[1][0] == ':')
 749                                         $match[1] = substr($match[1], 1);
 750                                 $thelink = $this->makeLink( $match[1], $text, "", $trail );
 751                         }
 752                         $comment = preg_replace( $linkRegexp, $thelink, $comment, 1 );
 753                 }
 754                 wfProfileOut( $fname );
 755                 return $comment;
 756         }
 757
 758         /** @todo document */
 759         function tocIndent() {
 760                 return "\n<ul>";
 761         }
 762
 763         /** @todo document */
 764         function tocUnindent($level) {
 765                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level>0 ? $level : 0 );
 766         }
 767
 768         /**
 769          * parameter level defines if we are on an indentation level
 770          */
 771         function tocLine( $anchor, $tocline, $tocnumber, $level ) {
 772                 return "\n<li class='toclevel-$level'><a href=\"#" . $anchor . '"><span class="tocnumber">' . $tocnumber . '</span> <span class="toctext">' . $tocline . '</span></a>';
 773         }
 774
 775         /** @todo document */
 776         function tocLineEnd() {
 777                 return "</li>\n";
 778         }
 779
 780         /** @todo document */
 781         function tocList($toc) {
 782                 return "<div id='toc'>\n"
 783                            . "<div id='toctitle'><h2>" . wfMsg('toc') . "</h2></div>\n"
 784                      . $toc
 785                                  . "</ul>\n</div>\n"
 786                                  . '<script type="text/javascript">'
 787                                  . ' if (window.showTocToggle) {'
 788                                  . ' var tocShowText = "' . addslashes( wfMsg('showtoc') ) . '";'
 789                                  . ' var tocHideText = "' . addslashes( wfMsg('hidetoc') ) . '"; '
 790                                  . ' showTocToggle();'
 791                                  . ' } '
 792                                  . '</script>'
 793                                  . "<div class='visualClear'></div>\n";
 794         }
 795
 796         /**
 797          * These two do not check for permissions: check $wgTitle->userCanEdit
 798          * before calling them
 799          */
 800         function editSectionScriptForOther( $title, $section, $head ) {
 801                 $ttl = Title::newFromText( $title );
 802                 $url = $ttl->escapeLocalURL( 'action=edit&section='.$section );
 803                 return '<span oncontextmenu=\'document.location="'.$url.'";return false;\'>'.$head.'</span>';
 804         }
 805
 806         /** @todo document */
 807         function editSectionScript( $nt, $section, $head ) {
 808                 global $wgRequest;
 809                 if( $wgRequest->getInt( 'oldid' ) && ( $wgRequest->getVal( 'diff' ) != '0' ) ) {
 810                         return $head;
 811                 }
 812                 $url = $nt->escapeLocalURL( 'action=edit&section='.$section );
 813                 return '<span oncontextmenu=\'document.location="'.$url.'";return false;\'>'.$head.'</span>';
 814         }
 815
 816         /** @todo document */
 817         function editSectionLinkForOther( $title, $section ) {
 818                 global $wgRequest;
 819                 global $wgContLang;
 820
 821                 $title = Title::newFromText($title);
 822                 $editurl = '&section='.$section;
 823                 $url = $this->makeKnownLink($title->getPrefixedText(),wfMsg('editsection'),'action=edit'.$editurl);
 824
 825                 if( $wgContLang->isRTL() ) {
 826                         $farside = 'left';
 827                         $nearside = 'right';
 828                 } else {
 829                         $farside = 'right';
 830                         $nearside = 'left';
 831                 }
 832                 return "<div class=\"editsection\" style=\"float:$farside;margin-$nearside:5px;\">[".$url."]</div>";
 833
 834         }
 835
 836         /** @todo document */
 837         function editSectionLink( $nt, $section ) {
 838                 global $wgRequest;
 839                 global $wgContLang;
 840
 841                 if( $wgRequest->getInt( 'oldid' ) && ( $wgRequest->getVal( 'diff' ) != '0' ) ) {
 842                         # Section edit links would be out of sync on an old page.
 843                         # But, if we're diffing to the current page, they'll be
 844                         # correct.
 845                         return '';
 846                 }
 847
 848                 $editurl = '&section='.$section;
 849                 $url = $this->makeKnownLink($nt->getPrefixedText(),wfMsg('editsection'),'action=edit'.$editurl);
 850
 851                 if( $wgContLang->isRTL() ) {
 852                         $farside = 'left';
 853                         $nearside = 'right';
 854                 } else {
 855                         $farside = 'right';
 856                         $nearside = 'left';
 857                 }
 858                 return "<div class=\"editsection\" style=\"float:$farside;margin-$nearside:5px;\">[".$url."]</div>";
 859         }
 860 }
 861 ?>