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
  20         function Linker() {}
  21
  22         /**
  23          * @deprecated
  24          */
  25         function postParseLinkColour( $s = NULL ) {
  26                 return NULL;
  27         }
  28
  29         /** @todo document */
  30         function getExternalLinkAttributes( $link, $text, $class='' ) {
  31                 global $wgContLang;
  32
  33                 $same = ($link == $text);
  34                 $link = urldecode( $link );
  35                 $link = $wgContLang->checkTitleEncoding( $link );
  36                 $link = preg_replace( '/[\\x00-\\x1f]/', ' ', $link );
  37                 $link = htmlspecialchars( $link );
  38
  39                 $r = ($class != '') ? " class='$class'" : " class='external'";
  40
  41                 $r .= " title=\"{$link}\"";
  42                 return $r;
  43         }
  44
  45         /** @todo document */
  46         function getInternalLinkAttributes( $link, $text, $broken = false ) {
  47                 $link = urldecode( $link );
  48                 $link = str_replace( '_', ' ', $link );
  49                 $link = htmlspecialchars( $link );
  50
  51                 if( $broken == 'stub' ) {
  52                         $r = ' class="stub"';
  53                 } else if ( $broken == 'yes' ) {
  54                         $r = ' class="new"';
  55                 } else {
  56                         $r = '';
  57                 }
  58
  59                 $r .= " title=\"{$link}\"";
  60                 return $r;
  61         }
  62
  63         /**
  64          * @param bool $broken
  65          */
  66         function getInternalLinkAttributesObj( &$nt, $text, $broken = false ) {
  67                 if( $broken == 'stub' ) {
  68                         $r = ' class="stub"';
  69                 } else if ( $broken == 'yes' ) {
  70                         $r = ' class="new"';
  71                 } else {
  72                         $r = '';
  73                 }
  74
  75                 $r .= ' title="' . $nt->getEscapedText() . '"';
  76                 return $r;
  77         }
  78
  79         /**
  80          * This function is a shortcut to makeLinkObj(Title::newFromText($title),...). Do not call
  81          * it if you already have a title object handy. See makeLinkObj for further documentation.
  82          *
  83          * @param string $title The text of the title
  84          * @param string $text Link text
  85          * @param string $query Optional query part
  86          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
  87          *                      be included in the link text. Other characters will be appended after
  88          *                      the end of the link.
  89          */
  90         function makeLink( $title, $text = '', $query = '', $trail = '' ) {
  91                 wfProfileIn( 'Linker::makeLink' );
  92                 $nt = Title::newFromText( $title );
  93                 if ($nt) {
  94                         $result = $this->makeLinkObj( Title::newFromText( $title ), $text, $query, $trail );
  95                 } else {
  96                         wfDebug( 'Invalid title passed to Linker::makeLink(): "'.$title."\"\n" );
  97                         $result = $text == "" ? $title : $text;
  98                 }
  99
 100                 wfProfileOut( 'Linker::makeLink' );
 101                 return $result;
 102         }
 103
 104         /**
 105          * This function is a shortcut to makeKnownLinkObj(Title::newFromText($title),...). Do not call
 106          * it if you already have a title object handy. See makeKnownLinkObj for further documentation.
 107          *
 108          * @param string $title The text of the title
 109          * @param string $text Link text
 110          * @param string $query Optional query part
 111          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 112          *                      be included in the link text. Other characters will be appended after
 113          *                      the end of the link.
 114          */
 115         function makeKnownLink( $title, $text = '', $query = '', $trail = '', $prefix = '',$aprops = '') {
 116                 $nt = Title::newFromText( $title );
 117                 if ($nt) {
 118                         return $this->makeKnownLinkObj( Title::newFromText( $title ), $text, $query, $trail, $prefix , $aprops );
 119                 } else {
 120                         wfDebug( 'Invalid title passed to Linker::makeKnownLink(): "'.$title."\"\n" );
 121                         return $text == '' ? $title : $text;
 122                 }
 123         }
 124
 125         /**
 126          * This function is a shortcut to makeBrokenLinkObj(Title::newFromText($title),...). Do not call
 127          * it if you already have a title object handy. See makeBrokenLinkObj for further documentation.
 128          *
 129          * @param string $title The text of the title
 130          * @param string $text Link text
 131          * @param string $query Optional query part
 132          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 133          *                      be included in the link text. Other characters will be appended after
 134          *                      the end of the link.
 135          */
 136         function makeBrokenLink( $title, $text = '', $query = '', $trail = '' ) {
 137                 $nt = Title::newFromText( $title );
 138                 if ($nt) {
 139                         return $this->makeBrokenLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 140                 } else {
 141                         wfDebug( 'Invalid title passed to Linker::makeBrokenLink(): "'.$title."\"\n" );
 142                         return $text == '' ? $title : $text;
 143                 }
 144         }
 145
 146         /**
 147          * This function is a shortcut to makeStubLinkObj(Title::newFromText($title),...). Do not call
 148          * it if you already have a title object handy. See makeStubLinkObj for further documentation.
 149          *
 150          * @param string $title The text of the title
 151          * @param string $text Link text
 152          * @param string $query Optional query part
 153          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 154          *                      be included in the link text. Other characters will be appended after
 155          *                      the end of the link.
 156          */
 157         function makeStubLink( $title, $text = '', $query = '', $trail = '' ) {
 158                 $nt = Title::newFromText( $title );
 159                 if ($nt) {
 160                         return $this->makeStubLinkObj( Title::newFromText( $title ), $text, $query, $trail );
 161                 } else {
 162                         wfDebug( 'Invalid title passed to Linker::makeStubLink(): "'.$title."\"\n" );
 163                         return $text == '' ? $title : $text;
 164                 }
 165         }
 166
 167         /**
 168          * Make a link for a title which may or may not be in the database. If you need to
 169          * call this lots of times, pre-fill the link cache with a LinkBatch, otherwise each
 170          * call to this will result in a DB query.
 171          *
 172          * @param string $title The text of the title
 173          * @param string $text Link text
 174          * @param string $query Optional query part
 175          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 176          *                      be included in the link text. Other characters will be appended after
 177          *                      the end of the link.
 178          */
 179         function makeLinkObj( $nt, $text= '', $query = '', $trail = '', $prefix = '' ) {
 180                 global $wgUser;
 181                 $fname = 'Linker::makeLinkObj';
 182                 wfProfileIn( $fname );
 183
 184                 # Fail gracefully
 185                 if ( ! is_object($nt) ) {
 186                         # wfDebugDieBacktrace();
 187                         wfProfileOut( $fname );
 188                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 189                 }
 190
 191                 $ns = $nt->getNamespace();
 192                 $dbkey = $nt->getDBkey();
 193                 if ( $nt->isExternal() ) {
 194                         $u = $nt->getFullURL();
 195                         $link = $nt->getPrefixedURL();
 196                         if ( '' == $text ) { $text = $nt->getPrefixedText(); }
 197                         $style = $this->getExternalLinkAttributes( $link, $text, 'extiw' );
 198
 199                         $inside = '';
 200                         if ( '' != $trail ) {
 201                                 if ( preg_match( '/^([a-z]+)(.*)$$/sD', $trail, $m ) ) {
 202                                         $inside = $m[1];
 203                                         $trail = $m[2];
 204                                 }
 205                         }
 206
 207                         # Check for anchors, normalize the anchor
 208
 209                         $parts = explode( '#', $u, 2 );
 210                         if ( count( $parts ) == 2 ) {
 211                                 $anchor = urlencode( Sanitizer::decodeCharReferences( str_replace(' ', '_', $parts[1] ) ) );
 212                                 $replacearray = array(
 213                                         '%3A' => ':',
 214                                         '%' => '.'
 215                                 );
 216                                 $u = $parts[0] . '#' .
 217                                      str_replace( array_keys( $replacearray ),
 218                                                  array_values( $replacearray ),
 219                                                  $anchor );
 220                         }
 221
 222                         $t = "<a href=\"{$u}\"{$style}>{$text}{$inside}</a>";
 223
 224                         wfProfileOut( $fname );
 225                         return $t;
 226                 } elseif ( $nt->isAlwaysKnown() ) {
 227                         # Image links, special page links and self-links with fragements are always known.
 228                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 229                 } else {
 230                         wfProfileIn( $fname.'-immediate' );
 231                         # Work out link colour immediately
 232                         $aid = $nt->getArticleID() ;
 233                         if ( 0 == $aid ) {
 234                                 $retVal = $this->makeBrokenLinkObj( $nt, $text, $query, $trail, $prefix );
 235                         } else {
 236                                 $threshold = $wgUser->getOption('stubthreshold') ;
 237                                 if ( $threshold > 0 ) {
 238                                         $dbr =& wfGetDB( DB_SLAVE );
 239                                         $s = $dbr->selectRow(
 240                                                 array( 'page' ),
 241                                                 array( 'page_len',
 242                                                         'page_namespace',
 243                                                         'page_is_redirect' ),
 244                                                 array( 'page_id' => $aid ), $fname ) ;
 245                                         if ( $s !== false ) {
 246                                                 $size = $s->page_len;
 247                                                 if ( $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
 248                                                         $size = $threshold*2 ; # Really big
 249                                                 }
 250                                         } else {
 251                                                 $size = $threshold*2 ; # Really big
 252                                         }
 253                                 } else {
 254                                         $size = 1 ;
 255                                 }
 256                                 if ( $size < $threshold ) {
 257                                         $retVal = $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 258                                 } else {
 259                                         $retVal = $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 260                                 }
 261                         }
 262                         wfProfileOut( $fname.'-immediate' );
 263                 }
 264                 wfProfileOut( $fname );
 265                 return $retVal;
 266         }
 267
 268         /**
 269          * Make a link for a title which definitely exists. This is faster than makeLinkObj because
 270          * it doesn't have to do a database query. It's also valid for interwiki titles and special
 271          * pages.
 272          *
 273          * @param object $nt Title of target page
 274          * @param string $text Text to replace the title
 275          * @param string $query Link target
 276          * @param string $trail Text after link
 277          * @param string $prefix Text before link text
 278          * @param string $aprops Extra attributes to the a-element
 279          * @param string $style Style to apply - if empty, use getInternalLinkAttributesObj instead
 280          * @return the a-element
 281          */
 282         function makeKnownLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' , $aprops = '', $style = '' ) {
 283
 284                 $fname = 'Linker::makeKnownLinkObj';
 285                 wfProfileIn( $fname );
 286
 287                 if ( !is_object( $nt ) ) {
 288                         wfProfileOut( $fname );
 289                         return $text;
 290                 }
 291
 292                 $u = $nt->escapeLocalURL( $query );
 293                 if ( $nt->getFragment() != '' ) {
 294                         if( $nt->getPrefixedDbkey() == '' ) {
 295                                 $u = '';
 296                                 if ( '' == $text ) {
 297                                         $text = htmlspecialchars( $nt->getFragment() );
 298                                 }
 299                         }
 300                         $anchor = urlencode( Sanitizer::decodeCharReferences( str_replace( ' ', '_', $nt->getFragment() ) ) );
 301                         $replacearray = array(
 302                                 '%3A' => ':',
 303                                 '%' => '.'
 304                         );
 305                         $u .= '#' . str_replace(array_keys($replacearray),array_values($replacearray),$anchor);
 306                 }
 307                 if ( $text == '' ) {
 308                         $text = htmlspecialchars( $nt->getPrefixedText() );
 309                 }
 310                 if ( $style == '' ) {
 311                         $style = $this->getInternalLinkAttributesObj( $nt, $text );
 312                 }
 313
 314                 if ( $aprops !== '' ) $aprops = ' ' . $aprops;
 315
 316                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 317                 $r = "<a href=\"{$u}\"{$style}{$aprops}>{$prefix}{$text}{$inside}</a>{$trail}";
 318                 wfProfileOut( $fname );
 319                 return $r;
 320         }
 321
 322         /**
 323          * Make a red link to the edit page of a given title.
 324          *
 325          * @param string $title The text of the title
 326          * @param string $text Link text
 327          * @param string $query Optional query part
 328          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 329          *                      be included in the link text. Other characters will be appended after
 330          *                      the end of the link.
 331          */
 332         function makeBrokenLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 333                 # Fail gracefully
 334                 if ( ! isset($nt) ) {
 335                         # wfDebugDieBacktrace();
 336                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 337                 }
 338
 339                 $fname = 'Linker::makeBrokenLinkObj';
 340                 wfProfileIn( $fname );
 341
 342                 if ( '' == $query ) {
 343                         $q = 'action=edit';
 344                 } else {
 345                         $q = 'action=edit&'.$query;
 346                 }
 347                 $u = $nt->escapeLocalURL( $q );
 348
 349                 if ( '' == $text ) {
 350                         $text = htmlspecialchars( $nt->getPrefixedText() );
 351                 }
 352                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 353
 354                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 355                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 356
 357                 wfProfileOut( $fname );
 358                 return $s;
 359         }
 360
 361         /**
 362          * Make a brown link to a short article.
 363          *
 364          * @param string $title The text of the title
 365          * @param string $text Link text
 366          * @param string $query Optional query part
 367          * @param string $trail Optional trail. Alphabetic characters at the start of this string will
 368          *                      be included in the link text. Other characters will be appended after
 369          *                      the end of the link.
 370          */
 371         function makeStubLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 372                 $link = $nt->getPrefixedURL();
 373
 374                 $u = $nt->escapeLocalURL( $query );
 375
 376                 if ( '' == $text ) {
 377                         $text = htmlspecialchars( $nt->getPrefixedText() );
 378                 }
 379                 $style = $this->getInternalLinkAttributesObj( $nt, $text, 'stub' );
 380
 381                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 382                 $s = "<a href=\"{$u}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 383                 return $s;
 384         }
 385
 386         /**
 387          * Generate either a normal exists-style link or a stub link, depending
 388          * on the given page size.
 389          *
 390          * @param int $size
 391          * @param Title $nt
 392          * @param string $text
 393          * @param string $query
 394          * @param string $trail
 395          * @param string $prefix
 396          * @return string HTML of link
 397          */
 398         function makeSizeLinkObj( $size, $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 399                 global $wgUser;
 400                 $threshold = intval( $wgUser->getOption( 'stubthreshold' ) );
 401                 if( $size < $threshold ) {
 402                         return $this->makeStubLinkObj( $nt, $text, $query, $trail, $prefix );
 403                 } else {
 404                         return $this->makeKnownLinkObj( $nt, $text, $query, $trail, $prefix );
 405                 }
 406         }
 407
 408         /**
 409          * Make appropriate markup for a link to the current article. This is currently rendered
 410          * as the bold link text. The calling sequence is the same as the other make*LinkObj functions,
 411          * despite $query not being used.
 412          */
 413         function makeSelfLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 414                 if ( '' == $text ) {
 415                         $text = htmlspecialchars( $nt->getPrefixedText() );
 416                 }
 417                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 418                 return "<strong>{$prefix}{$text}{$inside}</strong>{$trail}";
 419         }
 420
 421         /** @todo document */
 422         function fnamePart( $url ) {
 423                 $basename = strrchr( $url, '/' );
 424                 if ( false === $basename ) {
 425                         $basename = $url;
 426                 } else {
 427                         $basename = substr( $basename, 1 );
 428                 }
 429                 return htmlspecialchars( $basename );
 430         }
 431
 432         /** Obsolete alias */
 433         function makeImage( $url, $alt = '' ) {
 434                 return $this->makeExternalImage( $url, $alt );
 435         }
 436
 437         /** @todo document */
 438         function makeExternalImage( $url, $alt = '' ) {
 439                 if ( '' == $alt ) {
 440                         $alt = $this->fnamePart( $url );
 441                 }
 442                 $s = '<img src="'.$url.'" alt="'.$alt.'" />';
 443                 return $s;
 444         }
 445
 446         /** @todo document */
 447         function makeImageLinkObj( $nt, $label, $alt, $align = '', $width = false, $height = false, $framed = false,
 448           $thumb = false, $manual_thumb = '' )
 449         {
 450                 global $wgContLang, $wgUser, $wgThumbLimits;
 451
 452                 $img   = new Image( $nt );
 453                 if ( !$img->allowInlineDisplay() && $img->exists() ) {
 454                         return $this->makeKnownLinkObj( $nt );
 455                 }
 456
 457                 $url   = $img->getViewURL();
 458                 $error = $prefix = $postfix = '';
 459
 460                 wfDebug( "makeImageLinkObj: '$width'x'$height'\n" );
 461
 462                 if ( 'center' == $align )
 463                 {
 464                         $prefix  = '<div class="center">';
 465                         $postfix = '</div>';
 466                         $align   = 'none';
 467                 }
 468
 469                 if ( $thumb || $framed ) {
 470
 471                         # Create a thumbnail. Alignment depends on language
 472                         # writing direction, # right aligned for left-to-right-
 473                         # languages ("Western languages"), left-aligned
 474                         # for right-to-left-languages ("Semitic languages")
 475                         #
 476                         # If  thumbnail width has not been provided, it is set
 477                         # to the default user option as specified in Language*.php
 478                         if ( $align == '' ) {
 479                                 $align = $wgContLang->isRTL() ? 'left' : 'right';
 480                         }
 481
 482
 483                         if ( $width === false ) {
 484                                 $wopt = $wgUser->getOption( 'thumbsize' );
 485
 486                                 if( !isset( $wgThumbLimits[$wopt] ) ) {
 487                                          $wopt = User::getDefaultOption( 'thumbsize' );
 488                                 }
 489
 490                                 $width = min( $img->getWidth(), $wgThumbLimits[$wopt] );
 491                         }
 492
 493                         return $prefix.$this->makeThumbLinkObj( $img, $label, $alt, $align, $width, $height, $framed, $manual_thumb ).$postfix;
 494                 }
 495
 496                 if ( $width && $img->exists() ) {
 497
 498                         # Create a resized image, without the additional thumbnail
 499                         # features
 500
 501                         if ( $height == false )
 502                                 $height = -1;
 503                         if ( $manual_thumb == '') {
 504                                 $thumb = $img->getThumbnail( $width, $height );
 505                                 if ( $thumb ) {
 506                                         // In most cases, $width = $thumb->width or $height = $thumb->height.
 507                                         // If not, we're scaling the image larger than it can be scaled,
 508                                         // so we send to the browser a smaller thumbnail, and let the client do the scaling.
 509
 510                                         if ($height != -1 && $width > $thumb->width * $height / $thumb->height) {
 511                                                 // $height is the limiting factor, not $width
 512                                                 // set $width to the largest it can be, such that the resulting
 513                                                 // scaled height is at most $height
 514                                                 $width = floor($thumb->width * $height / $thumb->height);
 515                                         }
 516                                         $height = round($thumb->height * $width / $thumb->width);
 517
 518                                         wfDebug( "makeImageLinkObj: client-size set to '$width x $height'\n" );
 519                                         $url = $thumb->getUrl();
 520                                 } else {
 521                                         $error = htmlspecialchars( $img->getLastError() );
 522                                 }
 523                         }
 524                 } else {
 525                         $width = $img->width;
 526                         $height = $img->height;
 527                 }
 528
 529                 wfDebug( "makeImageLinkObj2: '$width'x'$height'\n" );
 530                 $u = $nt->escapeLocalURL();
 531                 if ( $error ) {
 532                         $s = $error;
 533                 } elseif ( $url == '' ) {
 534                         $s = $this->makeBrokenImageLinkObj( $img->getTitle() );
 535                         //$s .= "<br />{$alt}<br />{$url}<br />\n";
 536                 } else {
 537                         $s = '<a href="'.$u.'" class="image" title="'.$alt.'">' .
 538                                  '<img src="'.$url.'" alt="'.$alt.'" ' .
 539                                  ( $width
 540                                         ? ( 'width="'.$width.'" height="'.$height.'" ' )
 541                                         : '' ) .
 542                                  'longdesc="'.$u.'" /></a>';
 543                 }
 544                 if ( '' != $align ) {
 545                         $s = "<div class=\"float{$align}\"><span>{$s}</span></div>";
 546                 }
 547                 return str_replace("\n", ' ',$prefix.$s.$postfix);
 548         }
 549
 550         /**
 551          * Make HTML for a thumbnail including image, border and caption
 552          * $img is an Image object
 553          */
 554         function makeThumbLinkObj( $img, $label = '', $alt, $align = 'right', $boxwidth = 180, $boxheight=false, $framed=false , $manual_thumb = "" ) {
 555                 global $wgStylePath, $wgContLang;
 556                 $url  = $img->getViewURL();
 557                 $thumbUrl = '';
 558                 $error = '';
 559
 560                 $width = $height = 0;
 561                 if ( $img->exists() ) {
 562                         $width  = $img->getWidth();
 563                         $height = $img->getHeight();
 564                 }
 565                 if ( 0 == $width || 0 == $height ) {
 566                         $width = $height = 200;
 567                 }
 568                 if ( $boxwidth == 0 ) {
 569                         $boxwidth = 200;
 570                 }
 571                 if ( $framed ) {
 572                         // Use image dimensions, don't scale
 573                         $boxwidth  = $width;
 574                         $boxheight = $height;
 575                         $thumbUrl  = $url;
 576                 } else {
 577                         if ( $boxheight === false )
 578                                 $boxheight = -1;
 579                         if ( '' == $manual_thumb ) {
 580                                 $thumb = $img->getThumbnail( $boxwidth, $boxheight );
 581                                 if ( $thumb ) {
 582                                         $thumbUrl = $thumb->getUrl();
 583                                         $boxwidth = $thumb->width;
 584                                         $boxheight = $thumb->height;
 585                                 } else {
 586                                         $error = $img->getLastError();
 587                                 }
 588                         }
 589                 }
 590                 $oboxwidth = $boxwidth + 2;
 591
 592                 if ( $manual_thumb != '' ) # Use manually specified thumbnail
 593                 {
 594                         $manual_title = Title::makeTitleSafe( NS_IMAGE, $manual_thumb ); #new Title ( $manual_thumb ) ;
 595                         $manual_img = new Image( $manual_title );
 596                         $thumbUrl = $manual_img->getViewURL();
 597                         if ( $manual_img->exists() )
 598                         {
 599                                 $width  = $manual_img->getWidth();
 600                                 $height = $manual_img->getHeight();
 601                                 $boxwidth = $width ;
 602                                 $boxheight = $height ;
 603                                 $oboxwidth = $boxwidth + 2 ;
 604                         }
 605                 }
 606
 607                 $u = $img->getEscapeLocalURL();
 608
 609                 $more = htmlspecialchars( wfMsg( 'thumbnail-more' ) );
 610                 $magnifyalign = $wgContLang->isRTL() ? 'left' : 'right';
 611                 $textalign = $wgContLang->isRTL() ? ' style="text-align:right"' : '';
 612
 613                 $s = "<div class=\"thumb t{$align}\"><div style=\"width:{$oboxwidth}px;\">";
 614                 if( $thumbUrl == '' ) {
 615                         // Couldn't generate thumbnail? Scale the image client-side.
 616                         $thumbUrl = $url;
 617                 }
 618                 if ( $error ) {
 619                         $s .= htmlspecialchars( $error );
 620                         $zoomicon = '';
 621                 } elseif( !$img->exists() ) {
 622                         $s .= $this->makeBrokenImageLinkObj( $img->getTitle() );
 623                         $zoomicon = '';
 624                 } else {
 625                         $s .= '<a href="'.$u.'" class="internal" title="'.$alt.'">'.
 626                                 '<img src="'.$thumbUrl.'" alt="'.$alt.'" ' .
 627                                 'width="'.$boxwidth.'" height="'.$boxheight.'" ' .
 628                                 'longdesc="'.$u.'" /></a>';
 629                         if ( $framed ) {
 630                                 $zoomicon="";
 631                         } else {
 632                                 $zoomicon =  '<div class="magnify" style="float:'.$magnifyalign.'">'.
 633                                         '<a href="'.$u.'" class="internal" title="'.$more.'">'.
 634                                         '<img src="'.$wgStylePath.'/common/images/magnify-clip.png" ' .
 635                                         'width="15" height="11" alt="'.$more.'" /></a></div>';
 636                         }
 637                 }
 638                 $s .= '  <div class="thumbcaption" '.$textalign.'>'.$zoomicon.$label."</div></div></div>";
 639                 return str_replace("\n", ' ', $s);
 640         }
 641
 642         /**
 643          * Pass a title object, not a title string
 644          */
 645         function makeBrokenImageLinkObj( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
 646                 # Fail gracefully
 647                 if ( ! isset($nt) ) {
 648                         # wfDebugDieBacktrace();
 649                         return "<!-- ERROR -->{$prefix}{$text}{$trail}";
 650                 }
 651
 652                 $fname = 'Linker::makeBrokenImageLinkObj';
 653                 wfProfileIn( $fname );
 654
 655                 $q = 'wpDestFile=' . urlencode( $nt->getDBkey() );
 656                 if ( '' != $query ) {
 657                         $q .= "&$query";
 658                 }
 659                 $uploadTitle = Title::makeTitle( NS_SPECIAL, 'Upload' );
 660                 $url = $uploadTitle->escapeLocalURL( $q );
 661
 662                 if ( '' == $text ) {
 663                         $text = htmlspecialchars( $nt->getPrefixedText() );
 664                 }
 665                 $style = $this->getInternalLinkAttributesObj( $nt, $text, "yes" );
 666                 list( $inside, $trail ) = Linker::splitTrail( $trail );
 667                 $s = "<a href=\"{$url}\"{$style}>{$prefix}{$text}{$inside}</a>{$trail}";
 668
 669                 wfProfileOut( $fname );
 670                 return $s;
 671         }
 672
 673         /** @todo document */
 674         function makeMediaLink( $name, /* wtf?! */ $url, $alt = '' ) {
 675                 $nt = Title::makeTitleSafe( NS_IMAGE, $name );
 676                 return $this->makeMediaLinkObj( $nt, $alt );
 677         }
 678
 679         /**
 680          * Create a direct link to a given uploaded file.
 681          *
 682          * @param Title  $title
 683          * @param string $text   pre-sanitized HTML
 684          * @param bool   $nourl  Mask absolute URLs, so the parser doesn't
 685          *                       linkify them (it is currently not context-aware)
 686          * @return string HTML
 687          *
 688          * @access public
 689          * @todo Handle invalid or missing images better.
 690          */
 691         function makeMediaLinkObj( $title, $text = '' ) {
 692                 if( is_null( $title ) ) {
 693                         ### HOTFIX. Instead of breaking, return empty string.
 694                         return $text;
 695                 } else {
 696                         $name = $title->getDBKey();
 697                         $img  = new Image( $title );
 698                         if( $img->exists() ) {
 699                                 $url  = $img->getURL();
 700                                 $class = 'internal';
 701                         } else {
 702                                 $upload = Title::makeTitle( NS_SPECIAL, 'Upload' );
 703                                 $url = $upload->getLocalUrl( 'wpDestFile=' . urlencode( $img->getName() ) );
 704                                 $class = 'new';
 705                         }
 706                         $alt = htmlspecialchars( $title->getText() );
 707                         if( $text == '' ) {
 708                                 $text = $alt;
 709                         }
 710                         $u = htmlspecialchars( $url );
 711                         return "<a href=\"{$u}\" class='$class' title=\"{$alt}\">{$text}</a>";
 712                 }
 713         }
 714
 715         /** @todo document */
 716         function specialLink( $name, $key = '' ) {
 717                 global $wgContLang;
 718
 719                 if ( '' == $key ) { $key = strtolower( $name ); }
 720                 $pn = $wgContLang->ucfirst( $name );
 721                 return $this->makeKnownLink( $wgContLang->specialPage( $pn ),
 722                   wfMsg( $key ) );
 723         }
 724
 725         /** @todo document */
 726         function makeExternalLink( $url, $text, $escape = true, $linktype = '' ) {
 727                 $style = $this->getExternalLinkAttributes( $url, $text, 'external ' . $linktype );
 728                 global $wgNoFollowLinks;
 729                 if( $wgNoFollowLinks ) {
 730                         $style .= ' rel="nofollow"';
 731                 }
 732                 $url = htmlspecialchars( $url );
 733                 if( $escape ) {
 734                         $text = htmlspecialchars( $text );
 735                 }
 736                 return '<a href="'.$url.'"'.$style.'>'.$text.'</a>';
 737         }
 738
 739         /**
 740          * This function is called by all recent changes variants, by the page history,
 741          * and by the user contributions list. It is responsible for formatting edit
 742          * comments. It escapes any HTML in the comment, but adds some CSS to format
 743          * auto-generated comments (from section editing) and formats [[wikilinks]].
 744          *
 745          * The $title parameter must be a title OBJECT. It is used to generate a
 746          * direct link to the section in the autocomment.
 747          * @author Erik Moeller <moeller@scireview.de>
 748          *
 749          * Note: there's not always a title to pass to this function.
 750          * Since you can't set a default parameter for a reference, I've turned it
 751          * temporarily to a value pass. Should be adjusted further. --brion
 752          */
 753         function formatComment($comment, $title = NULL) {
 754                 $fname = 'Linker::formatComment';
 755                 wfProfileIn( $fname );
 756
 757                 global $wgContLang;
 758                 $comment = str_replace( "\n", " ", $comment );
 759                 $comment = htmlspecialchars( $comment );
 760
 761                 # The pattern for autogen comments is / * foo * /, which makes for
 762                 # some nasty regex.
 763                 # We look for all comments, match any text before and after the comment,
 764                 # add a separator where needed and format the comment itself with CSS
 765                 while (preg_match('/(.*)\/\*\s*(.*?)\s*\*\/(.*)/', $comment,$match)) {
 766                         $pre=$match[1];
 767                         $auto=$match[2];
 768                         $post=$match[3];
 769                         $link='';
 770                         if( $title ) {
 771                                 $section = $auto;
 772
 773                                 # This is hackish but should work in most cases.
 774                                 $section = str_replace( '[[', '', $section );
 775                                 $section = str_replace( ']]', '', $section );
 776                                 $sectionTitle = wfClone( $title );
 777                                 $sectionTitle->mFragment = $section;
 778                                 $link = $this->makeKnownLinkObj( $sectionTitle, wfMsg( 'sectionlink' ) );
 779                         }
 780                         $sep='-';
 781                         $auto=$link.$auto;
 782                         if($pre) { $auto = $sep.' '.$auto; }
 783                         if($post) { $auto .= ' '.$sep; }
 784                         $auto='<span class="autocomment">'.$auto.'</span>';
 785                         $comment=$pre.$auto.$post;
 786                 }
 787
 788                 # format regular and media links - all other wiki formatting
 789                 # is ignored
 790                 $medians = $wgContLang->getNsText( NS_MEDIA ) . ':';
 791                 while(preg_match('/\[\[(.*?)(\|(.*?))*\]\](.*)$/',$comment,$match)) {
 792                         # Handle link renaming [[foo|text]] will show link as "text"
 793                         if( "" != $match[3] ) {
 794                                 $text = $match[3];
 795                         } else {
 796                                 $text = $match[1];
 797                         }
 798                         if( preg_match( '/^' . $medians . '(.*)$/i', $match[1], $submatch ) ) {
 799                                 # Media link; trail not supported.
 800                                 $linkRegexp = '/\[\[(.*?)\]\]/';
 801                                 $thelink = $this->makeMediaLink( $submatch[1], "", $text );
 802                         } else {
 803                                 # Other kind of link
 804                                 if( preg_match( $wgContLang->linkTrail(), $match[4], $submatch ) ) {
 805                                         $trail = $submatch[1];
 806                                 } else {
 807                                         $trail = "";
 808                                 }
 809                                 $linkRegexp = '/\[\[(.*?)\]\]' . preg_quote( $trail, '/' ) . '/';
 810                                 if ($match[1][0] == ':')
 811                                         $match[1] = substr($match[1], 1);
 812                                 $thelink = $this->makeLink( $match[1], $text, "", $trail );
 813                         }
 814                         $comment = preg_replace( $linkRegexp, wfRegexReplacement( $thelink ), $comment, 1 );
 815                 }
 816                 wfProfileOut( $fname );
 817                 return $comment;
 818         }
 819
 820         /**
 821          * Wrap a comment in standard punctuation and formatting if
 822          * it's non-empty, otherwise return empty string.
 823          *
 824          * @param string $comment
 825          * @param Title $title
 826          * @param bool $deleted
 827          *
 828          * @return string
 829          */
 830         function commentBlock( $comment, $title = NULL, $deleted = false ) {
 831                 // '*' used to be the comment inserted by the software way back
 832                 // in antiquity in case none was provided, here for backwards
 833                 // compatability, acc. to brion -ævar
 834                 if( $comment == '' || $comment == '*' ) {
 835                         return '';
 836                 } else {
 837                         if ( $deleted )
 838                                 return " <span class='comment'>(...)</span>";
 839                         else {
 840                                 $formatted = $this->formatComment( $comment, $title );
 841                                 return " <span class='comment'>($formatted)</span>";
 842                         }
 843                 }
 844         }
 845
 846         /** @todo document */
 847         function tocIndent() {
 848                 return "\n<ul>";
 849         }
 850
 851         /** @todo document */
 852         function tocUnindent($level) {
 853                 return "</li>\n" . str_repeat( "</ul>\n</li>\n", $level>0 ? $level : 0 );
 854         }
 855
 856         /**
 857          * parameter level defines if we are on an indentation level
 858          */
 859         function tocLine( $anchor, $tocline, $tocnumber, $level ) {
 860                 return "\n<li class='toclevel-$level'><a href=\"#" .
 861                         $anchor . '"><span class="tocnumber">' .
 862                         $tocnumber . '</span> <span class="toctext">' .
 863                         $tocline . '</span></a>';
 864         }
 865
 866         /** @todo document */
 867         function tocLineEnd() {
 868                 return "</li>\n";
 869         }
 870
 871         /** @todo document */
 872         function tocList($toc) {
 873                 global $wgJsMimeType;
 874                 $title =  wfMsgForContent('toc') ;
 875                 return
 876                    '<table id="toc" class="toc" summary="' . $title .'"><tr><td>'
 877                  . '<div id="toctitle"><h2>' . $title . "</h2></div>\n"
 878                  . $toc
 879                  . "</ul>\n</td></tr></table>\n"
 880                  . '<script type="' . $wgJsMimeType . '">'
 881                  . ' if (window.showTocToggle) {'
 882                  . ' var tocShowText = "' . wfEscapeJsString( wfMsgForContent('showtoc') ) . '";'
 883                  . ' var tocHideText = "' . wfEscapeJsString( wfMsgForContent('hidetoc') ) . '";'
 884                  . ' showTocToggle();'
 885                  . ' } '
 886                  . "</script>\n";
 887         }
 888
 889         /** @todo document */
 890         function editSectionLinkForOther( $title, $section ) {
 891                 global $wgContLang;
 892
 893                 $title = Title::newFromText( $title );
 894                 $editurl = '&section='.$section;
 895                 $url = $this->makeKnownLinkObj( $title, wfMsg('editsection'), 'action=edit'.$editurl );
 896
 897                 if( $wgContLang->isRTL() ) {
 898                         $farside = 'left';
 899                         $nearside = 'right';
 900                 } else {
 901                         $farside = 'right';
 902                         $nearside = 'left';
 903                 }
 904                 return "<div class=\"editsection\" style=\"float:$farside;margin-$nearside:5px;\">[".$url."]</div>";
 905
 906         }
 907
 908         /**
 909          * @param Title $title
 910          * @param integer $section
 911          * @param string $hint Link title, or default if omitted or empty
 912          */
 913         function editSectionLink( $nt, $section, $hint='' ) {
 914                 global $wgContLang;
 915
 916                 $editurl = '&section='.$section;
 917                 $hint = ( $hint=='' ) ? '' : ' title="' . wfMsgHtml( 'editsectionhint', htmlspecialchars( $hint ) ) . '"';
 918                 $url = $this->makeKnownLinkObj( $nt, wfMsg('editsection'), 'action=edit'.$editurl, '', '', '',  $hint );
 919
 920                 if( $wgContLang->isRTL() ) {
 921                         $farside = 'left';
 922                         $nearside = 'right';
 923                 } else {
 924                         $farside = 'right';
 925                         $nearside = 'left';
 926                 }
 927                 return "<div class=\"editsection\" style=\"float:$farside;margin-$nearside:5px;\">[".$url."]</div>";
 928         }
 929
 930         /**
 931          * Split a link trail, return the "inside" portion and the remainder of the trail
 932          * as a two-element array
 933          *
 934          * @static
 935          */
 936         function splitTrail( $trail ) {
 937                 static $regex = false;
 938                 if ( $regex === false ) {
 939                         global $wgContLang;
 940                         $regex = $wgContLang->linkTrail();
 941                 }
 942                 $inside = '';
 943                 if ( '' != $trail ) {
 944                         if ( preg_match( $regex, $trail, $m ) ) {
 945                                 $inside = $m[1];
 946                                 $trail = $m[2];
 947                         }
 948                 }
 949                 return array( $inside, $trail );
 950         }
 951
 952 }
 953 ?>