includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mLanguageLinks = array();
  16         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  17         var $mTemplateIds = array();
  18
  19         var $mAllowUserJs;
  20         var $mSuppressQuickbar = false;
  21         var $mOnloadHandler = '';
  22         var $mDoNothing = false;
  23         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  24         var $mIsArticleRelated = true;
  25         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  26         var $mShowFeedLinks = false;
  27         var $mFeedLinksAppendQuery = false;
  28         var $mEnableClientCache = true;
  29         var $mArticleBodyOnly = false;
  30
  31         var $mNewSectionLink = false;
  32         var $mHideNewSectionLink = false;
  33         var $mNoGallery = false;
  34         var $mPageTitleActionText = '';
  35         var $mParseWarnings = array();
  36         var $mSquidMaxage = 0;
  37         var $mRevisionId = null;
  38
  39         /**
  40          * An array of stylesheet filenames (relative from skins path), with options
  41          * for CSS media, IE conditions, and RTL/LTR direction.
  42          * For internal use; add settings in the skin via $this->addStyle()
  43          */
  44         var $styles = array();
  45
  46         private $mIndexPolicy = 'index';
  47         private $mFollowPolicy = 'follow';
  48
  49         /**
  50          * Constructor
  51          * Initialise private variables
  52          */
  53         function __construct() {
  54                 global $wgAllowUserJs;
  55                 $this->mAllowUserJs = $wgAllowUserJs;
  56         }
  57
  58         public function redirect( $url, $responsecode = '302' ) {
  59                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  60                 $this->mRedirect = str_replace( "\n", '', $url );
  61                 $this->mRedirectCode = $responsecode;
  62         }
  63
  64         public function getRedirect() {
  65                 return $this->mRedirect;
  66         }
  67
  68         /**
  69          * Set the HTTP status code to send with the output.
  70          *
  71          * @param int $statusCode
  72          * @return nothing
  73          */
  74         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  75
  76         /**
  77          * Add a new <meta> tag
  78          * To add an http-equiv meta tag, precede the name with "http:"
  79          *
  80          * @param $name tag name
  81          * @param $val tag value
  82          */
  83         function addMeta( $name, $val ) {
  84                 array_push( $this->mMetatags, array( $name, $val ) );
  85         }
  86
  87         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  88         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  89
  90         function addExtensionStyle( $url ) {
  91                 $linkarr = array( 'rel' => 'stylesheet', 'href' => $url, 'type' => 'text/css' );
  92                 array_push( $this->mExtStyles, $linkarr );
  93         }
  94
  95         /**
  96          * Add a JavaScript file out of skins/common, or a given relative path.
  97          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
  98          */
  99         function addScriptFile( $file ) {
 100                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
 101                 if( substr( $file, 0, 1 ) == '/' ) {
 102                         $path = $file;
 103                 } else {
 104                         $path =  "{$wgStylePath}/common/{$file}";
 105                 }
 106                 $this->addScript(
 107                         Xml::element( 'script',
 108                                 array(
 109                                         'type' => $wgJsMimeType,
 110                                         'src' => "$path?$wgStyleVersion",
 111                                 ),
 112                                 '', false
 113                         )
 114                 );
 115         }
 116
 117         /**
 118          * Add a self-contained script tag with the given contents
 119          * @param string $script JavaScript text, no <script> tags
 120          */
 121         function addInlineScript( $script ) {
 122                 global $wgJsMimeType;
 123                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
 124         }
 125
 126         function getScript() {
 127                 return $this->mScripts . $this->getHeadItems();
 128         }
 129
 130         function getHeadItems() {
 131                 $s = '';
 132                 foreach ( $this->mHeadItems as $item ) {
 133                         $s .= $item;
 134                 }
 135                 return $s;
 136         }
 137
 138         function addHeadItem( $name, $value ) {
 139                 $this->mHeadItems[$name] = $value;
 140         }
 141
 142         function hasHeadItem( $name ) {
 143                 return isset( $this->mHeadItems[$name] );
 144         }
 145
 146         function setETag($tag) { $this->mETag = $tag; }
 147         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 148         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 149
 150         function addLink( $linkarr ) {
 151                 # $linkarr should be an associative array of attributes. We'll escape on output.
 152                 array_push( $this->mLinktags, $linkarr );
 153         }
 154
 155         # Get all links added by extensions
 156         function getExtStyle() {
 157                 return $this->mExtStyles;
 158         }
 159
 160         function addMetadataLink( $linkarr ) {
 161                 # note: buggy CC software only reads first "meta" link
 162                 static $haveMeta = false;
 163                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 164                 $this->addLink( $linkarr );
 165                 $haveMeta = true;
 166         }
 167
 168         /**
 169          * checkLastModified tells the client to use the client-cached page if
 170          * possible. If sucessful, the OutputPage is disabled so that
 171          * any future call to OutputPage->output() have no effect.
 172          *
 173          * Side effect: sets mLastModified for Last-Modified header
 174          *
 175          * @return bool True iff cache-ok headers was sent.
 176          */
 177         function checkLastModified( $timestamp ) {
 178                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 179
 180                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 181                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 182                         return false;
 183                 }
 184                 if( !$wgCachePages ) {
 185                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 186                         return false;
 187                 }
 188                 if( $wgUser->getOption( 'nocache' ) ) {
 189                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 190                         return false;
 191                 }
 192
 193                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 194                 $modifiedTimes = array(
 195                         'page' => $timestamp,
 196                         'user' => $wgUser->getTouched(),
 197                         'epoch' => $wgCacheEpoch
 198                 );
 199                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 200
 201                 $maxModified = max( $modifiedTimes );
 202                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 203
 204                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 205                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 206                         return false;
 207                 }
 208
 209                 # Make debug info
 210                 $info = '';
 211                 foreach ( $modifiedTimes as $name => $value ) {
 212                         if ( $info !== '' ) {
 213                                 $info .= ', ';
 214                         }
 215                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 216                 }
 217
 218                 # IE sends sizes after the date like this:
 219                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 220                 # this breaks strtotime().
 221                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 222
 223                 wfSuppressWarnings(); // E_STRICT system time bitching
 224                 $clientHeaderTime = strtotime( $clientHeader );
 225                 wfRestoreWarnings();
 226                 if ( !$clientHeaderTime ) {
 227                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 228                         return false;
 229                 }
 230                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 231
 232                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 233                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 234                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 235                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 236                 if( $clientHeaderTime < $maxModified ) {
 237                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 238                         return false;
 239                 }
 240
 241                 # Not modified
 242                 # Give a 304 response code and disable body output
 243                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 244                 ini_set('zlib.output_compression', 0);
 245                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 246                 $this->sendCacheControl();
 247                 $this->disable();
 248
 249                 // Don't output a compressed blob when using ob_gzhandler;
 250                 // it's technically against HTTP spec and seems to confuse
 251                 // Firefox when the response gets split over two packets.
 252                 wfClearOutputBuffers();
 253
 254                 return true;
 255         }
 256
 257         function setPageTitleActionText( $text ) {
 258                 $this->mPageTitleActionText = $text;
 259         }
 260
 261         function getPageTitleActionText () {
 262                 if ( isset( $this->mPageTitleActionText ) ) {
 263                         return $this->mPageTitleActionText;
 264                 }
 265         }
 266
 267         /**
 268          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 269          *
 270          * @param $policy string The literal string to output as the contents of
 271          *   the meta tag.  Will be parsed according to the spec and output in
 272          *   standardized form.
 273          * @return null
 274          */
 275         public function setRobotPolicy( $policy ) {
 276                 $policy = explode( ',', $policy );
 277                 $policy = array_map( 'trim', $policy );
 278
 279                 # The default policy is follow, so if nothing is said explicitly, we
 280                 # do that.
 281                 if( in_array( 'nofollow', $policy ) ) {
 282                         $this->mFollowPolicy = 'nofollow';
 283                 } else {
 284                         $this->mFollowPolicy = 'follow';
 285                 }
 286
 287                 if( in_array( 'noindex', $policy ) ) {
 288                         $this->mIndexPolicy = 'noindex';
 289                 } else {
 290                         $this->mIndexPolicy = 'index';
 291                 }
 292         }
 293
 294         /**
 295          * Set the index policy for the page, but leave the follow policy un-
 296          * touched.
 297          *
 298          * @param $policy string Either 'index' or 'noindex'.
 299          * @return null
 300          */
 301         public function setIndexPolicy( $policy ) {
 302                 $policy = trim( $policy );
 303                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 304                         $this->mIndexPolicy = $policy;
 305                 }
 306         }
 307
 308         /**
 309          * Set the follow policy for the page, but leave the index policy un-
 310          * touched.
 311          *
 312          * @param $policy string Either 'follow' or 'nofollow'.
 313          * @return null
 314          */
 315         public function setFollowPolicy( $policy ) {
 316                 $policy = trim( $policy );
 317                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 318                         $this->mFollowPolicy = $policy;
 319                 }
 320         }
 321
 322         public function setHTMLTitle( $name ) { $this->mHTMLtitle = $name; }
 323         public function setPageTitle( $name ) {
 324                 global $wgContLang;
 325                 $name = $wgContLang->convert( $name, true );
 326                 $this->mPagetitle = $name;
 327
 328                 $taction =  $this->getPageTitleActionText();
 329                 if( !empty( $taction ) ) {
 330                         $name .= ' - '.$taction;
 331                 }
 332
 333                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 334         }
 335
 336         public function getHTMLTitle() { return $this->mHTMLtitle; }
 337         public function getPageTitle() { return $this->mPagetitle; }
 338         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 339         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 340         public function getSubtitle() { return $this->mSubtitle; }
 341         public function isArticle() { return $this->mIsarticle; }
 342         public function setPrintable() { $this->mPrintable = true; }
 343         public function isPrintable() { return $this->mPrintable; }
 344         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 345         public function isSyndicated() { return $this->mShowFeedLinks; }
 346         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 347         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 348         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 349         public function getOnloadHandler() { return $this->mOnloadHandler; }
 350         public function disable() { $this->mDoNothing = true; }
 351         public function isDisabled() { return $this->mDoNothing; }
 352
 353         public function setArticleRelated( $v ) {
 354                 $this->mIsArticleRelated = $v;
 355                 if ( !$v ) {
 356                         $this->mIsarticle = false;
 357                 }
 358         }
 359         public function setArticleFlag( $v ) {
 360                 $this->mIsarticle = $v;
 361                 if ( $v ) {
 362                         $this->mIsArticleRelated = $v;
 363                 }
 364         }
 365
 366         public function isArticleRelated() { return $this->mIsArticleRelated; }
 367
 368         public function getLanguageLinks() { return $this->mLanguageLinks; }
 369         public function addLanguageLinks($newLinkArray) {
 370                 $this->mLanguageLinks += $newLinkArray;
 371         }
 372         public function setLanguageLinks($newLinkArray) {
 373                 $this->mLanguageLinks = $newLinkArray;
 374         }
 375
 376         public function getCategoryLinks() {
 377                 return $this->mCategoryLinks;
 378         }
 379
 380         /**
 381          * Add an array of categories, with names in the keys
 382          */
 383         public function addCategoryLinks( $categories ) {
 384                 global $wgUser, $wgContLang;
 385
 386                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 387                         return;
 388                 }
 389
 390                 # Add the links to a LinkBatch
 391                 $arr = array( NS_CATEGORY => $categories );
 392                 $lb = new LinkBatch;
 393                 $lb->setArray( $arr );
 394
 395                 # Fetch existence plus the hiddencat property
 396                 $dbr = wfGetDB( DB_SLAVE );
 397                 $pageTable = $dbr->tableName( 'page' );
 398                 $where = $lb->constructSet( 'page', $dbr );
 399                 $propsTable = $dbr->tableName( 'page_props' );
 400                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 401                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 402                 $res = $dbr->query( $sql, __METHOD__ );
 403
 404                 # Add the results to the link cache
 405                 $lb->addResultToCache( LinkCache::singleton(), $res );
 406
 407                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 408                 $categories = array_combine( array_keys( $categories ),
 409                         array_fill( 0, count( $categories ), 'normal' ) );
 410
 411                 # Mark hidden categories
 412                 foreach ( $res as $row ) {
 413                         if ( isset( $row->pp_value ) ) {
 414                                 $categories[$row->page_title] = 'hidden';
 415                         }
 416                 }
 417
 418                 # Add the remaining categories to the skin
 419                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 420                         $sk = $wgUser->getSkin();
 421                         foreach ( $categories as $category => $type ) {
 422                                 $origcategory = $category;
 423                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 424                                 $wgContLang->findVariantLink( $category, $title, true );
 425                                 if ( $category != $origcategory )
 426                                         if ( array_key_exists( $category, $categories ) )
 427                                                 continue;
 428                                 $text = $wgContLang->convertHtml( $title->getText() );
 429                                 $this->mCategoryLinks[$type][] = $sk->makeLinkObj( $title, $text );
 430                         }
 431                 }
 432         }
 433
 434         public function setCategoryLinks($categories) {
 435                 $this->mCategoryLinks = array();
 436                 $this->addCategoryLinks($categories);
 437         }
 438
 439         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 440         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 441
 442         public function disallowUserJs() { $this->mAllowUserJs = false; }
 443         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 444
 445         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 446         public function addHTML( $text ) { $this->mBodytext .= $text; }
 447         public function clearHTML() { $this->mBodytext = ''; }
 448         public function getHTML() { return $this->mBodytext; }
 449         public function debug( $text ) { $this->mDebugtext .= $text; }
 450
 451         /* @deprecated */
 452         public function setParserOptions( $options ) {
 453                 wfDeprecated( __METHOD__ );
 454                 return $this->parserOptions( $options );
 455         }
 456
 457         public function parserOptions( $options = null ) {
 458                 if ( !$this->mParserOptions ) {
 459                         $this->mParserOptions = new ParserOptions;
 460                 }
 461                 return wfSetVar( $this->mParserOptions, $options );
 462         }
 463
 464         /**
 465          * Set the revision ID which will be seen by the wiki text parser
 466          * for things such as embedded {{REVISIONID}} variable use.
 467          * @param mixed $revid an integer, or NULL
 468          * @return mixed previous value
 469          */
 470         public function setRevisionId( $revid ) {
 471                 $val = is_null( $revid ) ? null : intval( $revid );
 472                 return wfSetVar( $this->mRevisionId, $val );
 473         }
 474
 475         public function getRevisionId() {
 476                 return $this->mRevisionId;
 477         }
 478
 479         /**
 480          * Convert wikitext to HTML and add it to the buffer
 481          * Default assumes that the current page title will
 482          * be used.
 483          *
 484          * @param string $text
 485          * @param bool   $linestart
 486          */
 487         public function addWikiText( $text, $linestart = true ) {
 488                 global $wgTitle;
 489                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 490         }
 491
 492         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 493                 $this->addWikiTextTitle($text, $title, $linestart);
 494         }
 495
 496         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 497                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 498         }
 499
 500         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 501                 global $wgParser;
 502
 503                 wfProfileIn( __METHOD__ );
 504
 505                 wfIncrStats( 'pcache_not_possible' );
 506
 507                 $popts = $this->parserOptions();
 508                 $oldTidy = $popts->setTidy( $tidy );
 509
 510                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 511                         $linestart, true, $this->mRevisionId );
 512
 513                 $popts->setTidy( $oldTidy );
 514
 515                 $this->addParserOutput( $parserOutput );
 516
 517                 wfProfileOut( __METHOD__ );
 518         }
 519
 520         /**
 521          * @todo document
 522          * @param ParserOutput object &$parserOutput
 523          */
 524         public function addParserOutputNoText( &$parserOutput ) {
 525                 global $wgTitle, $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 526
 527                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 528                 $this->addCategoryLinks( $parserOutput->getCategories() );
 529                 $this->mNewSectionLink = $parserOutput->getNewSection();
 530                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 531
 532                 if( is_null( $wgExemptFromUserRobotsControl ) ) {
 533                         $bannedNamespaces = $wgContentNamespaces;
 534                 } else {
 535                         $bannedNamespaces = $wgExemptFromUserRobotsControl;
 536                 }
 537                 if( !in_array( $wgTitle->getNamespace(), $bannedNamespaces ) ) {
 538                         # FIXME (bug 14900): This overrides $wgArticleRobotPolicies, and it
 539                         # shouldn't
 540                         $this->setIndexPolicy( $parserOutput->getIndexPolicy() );
 541                 }
 542
 543                 $this->addKeywords( $parserOutput );
 544                 $this->mParseWarnings = $parserOutput->getWarnings();
 545                 if ( $parserOutput->getCacheTime() == -1 ) {
 546                         $this->enableClientCache( false );
 547                 }
 548                 $this->mNoGallery = $parserOutput->getNoGallery();
 549                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 550                 // Versioning...
 551                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 552                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 553                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 554                         } else {
 555                                 $this->mTemplateIds[$ns] = $dbks;
 556                         }
 557                 }
 558                 // Page title
 559                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 560                         $this->setPageTitle( $dt );
 561                 else if ( ( $title = $parserOutput->getTitleText() ) != '' )
 562                         $this->setPageTitle( $title );
 563
 564                 // Hooks registered in the object
 565                 global $wgParserOutputHooks;
 566                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 567                         list( $hookName, $data ) = $hookInfo;
 568                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 569                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 570                         }
 571                 }
 572
 573                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 574         }
 575
 576         /**
 577          * @todo document
 578          * @param ParserOutput &$parserOutput
 579          */
 580         function addParserOutput( &$parserOutput ) {
 581                 $this->addParserOutputNoText( $parserOutput );
 582                 $text = $parserOutput->getText();
 583                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 584                 $this->addHTML( $text );
 585         }
 586
 587         /**
 588          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 589          * Saves the text into the parser cache if possible.
 590          *
 591          * @param string  $text
 592          * @param Article $article
 593          * @param bool    $cache
 594          * @deprecated Use Article::outputWikitext
 595          */
 596         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 597                 global $wgParser, $wgUser;
 598
 599                 wfDeprecated( __METHOD__ );
 600
 601                 $popts = $this->parserOptions();
 602                 $popts->setTidy(true);
 603                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 604                         $popts, true, true, $this->mRevisionId );
 605                 $popts->setTidy(false);
 606                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 607                         $parserCache = ParserCache::singleton();
 608                         $parserCache->save( $parserOutput, $article, $popts);
 609                 }
 610
 611                 $this->addParserOutput( $parserOutput );
 612         }
 613
 614         /**
 615          * @deprecated use addWikiTextTidy()
 616          */
 617         public function addSecondaryWikiText( $text, $linestart = true ) {
 618                 global $wgTitle;
 619                 wfDeprecated( __METHOD__ );
 620                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 621         }
 622
 623         /**
 624          * Add wikitext with tidy enabled
 625          */
 626         public function addWikiTextTidy(  $text, $linestart = true ) {
 627                 global $wgTitle;
 628                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 629         }
 630
 631
 632         /**
 633          * Add the output of a QuickTemplate to the output buffer
 634          *
 635          * @param QuickTemplate $template
 636          */
 637         public function addTemplate( &$template ) {
 638                 ob_start();
 639                 $template->execute();
 640                 $this->addHTML( ob_get_contents() );
 641                 ob_end_clean();
 642         }
 643
 644         /**
 645          * Parse wikitext and return the HTML.
 646          *
 647          * @param string $text
 648          * @param bool   $linestart Is this the start of a line?
 649          * @param bool   $interface ??
 650          */
 651         public function parse( $text, $linestart = true, $interface = false ) {
 652                 global $wgParser, $wgTitle;
 653                 if( is_null( $wgTitle ) ) {
 654                         throw new MWException( 'Empty $wgTitle in ' . __METHOD__ );
 655                 }
 656                 $popts = $this->parserOptions();
 657                 if ( $interface) { $popts->setInterfaceMessage(true); }
 658                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 659                         $linestart, true, $this->mRevisionId );
 660                 if ( $interface) { $popts->setInterfaceMessage(false); }
 661                 return $parserOutput->getText();
 662         }
 663
 664         /** Parse wikitext, strip paragraphs, and return the HTML. */
 665         public function parseInline( $text, $linestart = true, $interface = false ) {
 666                 $parsed = $this->parse( $text, $linestart, $interface );
 667
 668                 $m = array();
 669                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 670                         $parsed = $m[1];
 671                 }
 672
 673                 return $parsed;
 674         }
 675
 676         /**
 677          * @param Article $article
 678          * @param User    $user
 679          *
 680          * @return bool True if successful, else false.
 681          */
 682         public function tryParserCache( &$article ) {
 683                 $parserCache = ParserCache::singleton();
 684                 $parserOutput = $parserCache->get( $article, $this->parserOptions() );
 685                 if ( $parserOutput !== false ) {
 686                         $this->addParserOutput( $parserOutput );
 687                         return true;
 688                 } else {
 689                         return false;
 690                 }
 691         }
 692
 693         /**
 694          * @param int $maxage Maximum cache time on the Squid, in seconds.
 695          */
 696         public function setSquidMaxage( $maxage ) {
 697                 $this->mSquidMaxage = $maxage;
 698         }
 699
 700         /**
 701          * Use enableClientCache(false) to force it to send nocache headers
 702          * @param $state ??
 703          */
 704         public function enableClientCache( $state ) {
 705                 return wfSetVar( $this->mEnableClientCache, $state );
 706         }
 707
 708         function getCacheVaryCookies() {
 709                 global $wgCookiePrefix, $wgCacheVaryCookies;
 710                 static $cookies;
 711                 if ( $cookies === null ) {
 712                         $cookies = array_merge(
 713                                 array(
 714                                         "{$wgCookiePrefix}Token",
 715                                         "{$wgCookiePrefix}LoggedOut",
 716                                         session_name()
 717                                 ),
 718                                 $wgCacheVaryCookies
 719                         );
 720                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 721                 }
 722                 return $cookies;
 723         }
 724
 725         function uncacheableBecauseRequestVars() {
 726                 global $wgRequest;
 727                 return  $wgRequest->getText('useskin', false) === false
 728                         && $wgRequest->getText('uselang', false) === false;
 729         }
 730
 731         /**
 732          * Check if the request has a cache-varying cookie header
 733          * If it does, it's very important that we don't allow public caching
 734          */
 735         function haveCacheVaryCookies() {
 736                 global $wgRequest;
 737                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 738                 if ( $cookieHeader === false ) {
 739                         return false;
 740                 }
 741                 $cvCookies = $this->getCacheVaryCookies();
 742                 foreach ( $cvCookies as $cookieName ) {
 743                         # Check for a simple string match, like the way squid does it
 744                         if ( strpos( $cookieHeader, $cookieName ) ) {
 745                                 wfDebug( __METHOD__.": found $cookieName\n" );
 746                                 return true;
 747                         }
 748                 }
 749                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 750                 return false;
 751         }
 752
 753         /** Get a complete X-Vary-Options header */
 754         public function getXVO() {
 755                 $cvCookies = $this->getCacheVaryCookies();
 756                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 757                 $first = true;
 758                 foreach ( $cvCookies as $cookieName ) {
 759                         if ( $first ) {
 760                                 $first = false;
 761                         } else {
 762                                 $xvo .= ';';
 763                         }
 764                         $xvo .= 'string-contains=' . $cookieName;
 765                 }
 766                 return $xvo;
 767         }
 768
 769         public function sendCacheControl() {
 770                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 771
 772                 $response = $wgRequest->response();
 773                 if ($wgUseETag && $this->mETag)
 774                         $response->header("ETag: $this->mETag");
 775
 776                 # don't serve compressed data to clients who can't handle it
 777                 # maintain different caches for logged-in users and non-logged in ones
 778                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 779
 780                 # Add an X-Vary-Options header for Squid with Wikimedia patches
 781                 $response->header( $this->getXVO() );
 782
 783                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 784                         if( $wgUseSquid && session_id() == '' &&
 785                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 786                         {
 787                                 if ( $wgUseESI ) {
 788                                         # We'll purge the proxy cache explicitly, but require end user agents
 789                                         # to revalidate against the proxy on each visit.
 790                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 791                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 792                                         # start with a shorter timeout for initial testing
 793                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 794                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 795                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 796                                 } else {
 797                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 798                                         # to revalidate against the proxy on each visit.
 799                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 800                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 801                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 802                                         # start with a shorter timeout for initial testing
 803                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 804                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 805                                 }
 806                         } else {
 807                                 # We do want clients to cache if they can, but they *must* check for updates
 808                                 # on revisiting the page.
 809                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 810                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 811                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 812                         }
 813                         if($this->mLastModified) {
 814                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 815                         }
 816                 } else {
 817                         wfDebug( __METHOD__ . ": no caching **\n", false );
 818
 819                         # In general, the absence of a last modified header should be enough to prevent
 820                         # the client from using its cache. We send a few other things just to make sure.
 821                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 822                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 823                         $response->header( 'Pragma: no-cache' );
 824                 }
 825         }
 826
 827         /**
 828          * Finally, all the text has been munged and accumulated into
 829          * the object, let's actually output it:
 830          */
 831         public function output() {
 832                 global $wgUser, $wgOutputEncoding, $wgRequest;
 833                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 834                 global $wgJsMimeType, $wgUseAjax, $wgAjaxWatch;
 835                 global $wgEnableMWSuggest, $wgUniversalEditButton;
 836                 global $wgArticle, $wgTitle;
 837
 838                 if( $this->mDoNothing ){
 839                         return;
 840                 }
 841
 842                 wfProfileIn( __METHOD__ );
 843
 844                 if ( '' != $this->mRedirect ) {
 845                         # Standards require redirect URLs to be absolute
 846                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
 847                         if( $this->mRedirectCode == '301') {
 848                                 if( !$wgDebugRedirects ) {
 849                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 850                                 }
 851                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 852                         }
 853
 854                         $this->sendCacheControl();
 855
 856                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 857                         if( $wgDebugRedirects ) {
 858                                 $url = htmlspecialchars( $this->mRedirect );
 859                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 860                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 861                                 print "</body>\n</html>\n";
 862                         } else {
 863                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 864                         }
 865                         wfProfileOut( __METHOD__ );
 866                         return;
 867                 }
 868                 elseif ( $this->mStatusCode )
 869                 {
 870                         $statusMessage = array(
 871                                 100 => 'Continue',
 872                                 101 => 'Switching Protocols',
 873                                 102 => 'Processing',
 874                                 200 => 'OK',
 875                                 201 => 'Created',
 876                                 202 => 'Accepted',
 877                                 203 => 'Non-Authoritative Information',
 878                                 204 => 'No Content',
 879                                 205 => 'Reset Content',
 880                                 206 => 'Partial Content',
 881                                 207 => 'Multi-Status',
 882                                 300 => 'Multiple Choices',
 883                                 301 => 'Moved Permanently',
 884                                 302 => 'Found',
 885                                 303 => 'See Other',
 886                                 304 => 'Not Modified',
 887                                 305 => 'Use Proxy',
 888                                 307 => 'Temporary Redirect',
 889                                 400 => 'Bad Request',
 890                                 401 => 'Unauthorized',
 891                                 402 => 'Payment Required',
 892                                 403 => 'Forbidden',
 893                                 404 => 'Not Found',
 894                                 405 => 'Method Not Allowed',
 895                                 406 => 'Not Acceptable',
 896                                 407 => 'Proxy Authentication Required',
 897                                 408 => 'Request Timeout',
 898                                 409 => 'Conflict',
 899                                 410 => 'Gone',
 900                                 411 => 'Length Required',
 901                                 412 => 'Precondition Failed',
 902                                 413 => 'Request Entity Too Large',
 903                                 414 => 'Request-URI Too Large',
 904                                 415 => 'Unsupported Media Type',
 905                                 416 => 'Request Range Not Satisfiable',
 906                                 417 => 'Expectation Failed',
 907                                 422 => 'Unprocessable Entity',
 908                                 423 => 'Locked',
 909                                 424 => 'Failed Dependency',
 910                                 500 => 'Internal Server Error',
 911                                 501 => 'Not Implemented',
 912                                 502 => 'Bad Gateway',
 913                                 503 => 'Service Unavailable',
 914                                 504 => 'Gateway Timeout',
 915                                 505 => 'HTTP Version Not Supported',
 916                                 507 => 'Insufficient Storage'
 917                         );
 918
 919                         if ( $statusMessage[$this->mStatusCode] )
 920                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 921                 }
 922
 923                 $sk = $wgUser->getSkin();
 924
 925                 if ( $wgUseAjax ) {
 926                         $this->addScriptFile( 'ajax.js' );
 927
 928                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 929
 930                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 931                                 $this->addScriptFile( 'ajaxwatch.js' );
 932                         }
 933
 934                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
 935                                 $this->addScriptFile( 'mwsuggest.js' );
 936                         }
 937                 }
 938
 939                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
 940                         $this->addScriptFile( 'rightclickedit.js' );
 941                 }
 942
 943                 if( $wgUniversalEditButton ) {
 944                         if( isset( $wgArticle ) && isset( $wgTitle ) && $wgTitle->quickUserCan( 'edit' )
 945                                 && ( $wgTitle->exists() || $wgTitle->quickUserCan( 'create' ) ) ) {
 946                                 // Original UniversalEditButton
 947                                 $this->addLink( array(
 948                                         'rel' => 'alternate',
 949                                         'type' => 'application/x-wiki',
 950                                         'title' => wfMsg( 'edit' ),
 951                                         'href' => $wgTitle->getLocalURL( 'action=edit' )
 952                                 ) );
 953                                 // Alternate edit link
 954                                 $this->addLink( array(
 955                                         'rel' => 'edit',
 956                                         'title' => wfMsg( 'edit' ),
 957                                         'href' => $wgTitle->getLocalURL( 'action=edit' )
 958                                 ) );
 959                         }
 960                 }
 961
 962                 # Buffer output; final headers may depend on later processing
 963                 ob_start();
 964
 965                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 966                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 967
 968                 if ($this->mArticleBodyOnly) {
 969                         $this->out($this->mBodytext);
 970                 } else {
 971                         // Hook that allows last minute changes to the output page, e.g.
 972                         // adding of CSS or Javascript by extensions.
 973                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
 974
 975                         wfProfileIn( 'Output-skin' );
 976                         $sk->outputPage( $this );
 977                         wfProfileOut( 'Output-skin' );
 978                 }
 979
 980                 $this->sendCacheControl();
 981                 ob_end_flush();
 982                 wfProfileOut( __METHOD__ );
 983         }
 984
 985         /**
 986          * @todo document
 987          * @param string $ins
 988          */
 989         public function out( $ins ) {
 990                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 991                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 992                         $outs = $ins;
 993                 } else {
 994                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 995                         if ( false === $outs ) { $outs = $ins; }
 996                 }
 997                 print $outs;
 998         }
 999
1000         /**
1001          * @todo document
1002          */
1003         public static function setEncodings() {
1004                 global $wgInputEncoding, $wgOutputEncoding;
1005                 global $wgUser, $wgContLang;
1006
1007                 $wgInputEncoding = strtolower( $wgInputEncoding );
1008
1009                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1010                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1011                         return;
1012                 }
1013                 $wgOutputEncoding = $wgInputEncoding;
1014         }
1015
1016         /**
1017          * Deprecated, use wfReportTime() instead.
1018          * @return string
1019          * @deprecated
1020          */
1021         public function reportTime() {
1022                 wfDeprecated( __METHOD__ );
1023                 $time = wfReportTime();
1024                 return $time;
1025         }
1026
1027         /**
1028          * Produce a "user is blocked" page.
1029          *
1030          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1031          * @return nothing
1032          */
1033         function blockedPage( $return = true ) {
1034                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
1035
1036                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1037                 $this->setRobotPolicy( 'noindex,nofollow' );
1038                 $this->setArticleRelated( false );
1039
1040                 $name = User::whoIs( $wgUser->blockedBy() );
1041                 $reason = $wgUser->blockedFor();
1042                 if( $reason == '' ) {
1043                         $reason = wfMsg( 'blockednoreason' );
1044                 }
1045                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1046                 $ip = wfGetIP();
1047
1048                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1049
1050                 $blockid = $wgUser->mBlock->mId;
1051
1052                 $blockExpiry = $wgUser->mBlock->mExpiry;
1053                 if ( $blockExpiry == 'infinity' ) {
1054                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1055                         // Search for localization in 'ipboptions'
1056                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1057                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1058                                 if ( strpos( $option, ":" ) === false )
1059                                         continue;
1060                                 list( $show, $value ) = explode( ":", $option );
1061                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1062                                         $blockExpiry = $show;
1063                                         break;
1064                                 }
1065                         }
1066                 } else {
1067                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1068                 }
1069
1070                 if ( $wgUser->mBlock->mAuto ) {
1071                         $msg = 'autoblockedtext';
1072                 } else {
1073                         $msg = 'blockedtext';
1074                 }
1075
1076                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1077                  * This could be a username, an ip range, or a single ip. */
1078                 $intended = $wgUser->mBlock->mAddress;
1079
1080                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1081
1082                 # Don't auto-return to special pages
1083                 if( $return ) {
1084                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle : NULL;
1085                         $this->returnToMain( null, $return );
1086                 }
1087         }
1088
1089         /**
1090          * Output a standard error page
1091          *
1092          * @param string $title Message key for page title
1093          * @param string $msg Message key for page text
1094          * @param array $params Message parameters
1095          */
1096         public function showErrorPage( $title, $msg, $params = array() ) {
1097                 global $wgTitle;
1098                 if ( isset($wgTitle) ) {
1099                         $this->mDebugtext .= 'Original title: ' . $wgTitle->getPrefixedText() . "\n";
1100                 }
1101                 $this->setPageTitle( wfMsg( $title ) );
1102                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1103                 $this->setRobotPolicy( 'noindex,nofollow' );
1104                 $this->setArticleRelated( false );
1105                 $this->enableClientCache( false );
1106                 $this->mRedirect = '';
1107                 $this->mBodytext = '';
1108
1109                 array_unshift( $params, 'parse' );
1110                 array_unshift( $params, $msg );
1111                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1112
1113                 $this->returnToMain();
1114         }
1115
1116         /**
1117          * Output a standard permission error page
1118          *
1119          * @param array $errors Error message keys
1120          */
1121         public function showPermissionsErrorPage( $errors, $action = null )
1122         {
1123                 global $wgTitle;
1124
1125                 $this->mDebugtext .= 'Original title: ' .
1126                 $wgTitle->getPrefixedText() . "\n";
1127                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1128                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1129                 $this->setRobotPolicy( 'noindex,nofollow' );
1130                 $this->setArticleRelated( false );
1131                 $this->enableClientCache( false );
1132                 $this->mRedirect = '';
1133                 $this->mBodytext = '';
1134                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1135         }
1136
1137         /** @deprecated */
1138         public function errorpage( $title, $msg ) {
1139                 wfDeprecated( __METHOD__ );
1140                 throw new ErrorPageError( $title, $msg );
1141         }
1142
1143         /**
1144          * Display an error page indicating that a given version of MediaWiki is
1145          * required to use it
1146          *
1147          * @param mixed $version The version of MediaWiki needed to use the page
1148          */
1149         public function versionRequired( $version ) {
1150                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1151                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1152                 $this->setRobotPolicy( 'noindex,nofollow' );
1153                 $this->setArticleRelated( false );
1154                 $this->mBodytext = '';
1155
1156                 $this->addWikiMsg( 'versionrequiredtext', $version );
1157                 $this->returnToMain();
1158         }
1159
1160         /**
1161          * Display an error page noting that a given permission bit is required.
1162          *
1163          * @param string $permission key required
1164          */
1165         public function permissionRequired( $permission ) {
1166                 global $wgUser, $wgLang;
1167
1168                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1169                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1170                 $this->setRobotPolicy( 'noindex,nofollow' );
1171                 $this->setArticleRelated( false );
1172                 $this->mBodytext = '';
1173
1174                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1175                         User::getGroupsWithPermission( $permission ) );
1176                 if( $groups ) {
1177                         $this->addWikiMsg( 'badaccess-groups',
1178                                 $wgLang->commaList( $groups ),
1179                                 count( $groups) );
1180                 } else {
1181                         $this->addWikiMsg( 'badaccess-group0' );
1182                 }
1183                 $this->returnToMain();
1184         }
1185
1186         /**
1187          * Use permissionRequired.
1188          * @deprecated
1189          */
1190         public function sysopRequired() {
1191                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1192         }
1193
1194         /**
1195          * Use permissionRequired.
1196          * @deprecated
1197          */
1198         public function developerRequired() {
1199                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1200         }
1201
1202         /**
1203          * Produce the stock "please login to use the wiki" page
1204          */
1205         public function loginToUse() {
1206                 global $wgUser, $wgTitle, $wgContLang;
1207
1208                 if( $wgUser->isLoggedIn() ) {
1209                         $this->permissionRequired( 'read' );
1210                         return;
1211                 }
1212
1213                 $skin = $wgUser->getSkin();
1214
1215                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1216                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1217                 $this->setRobotPolicy( 'noindex,nofollow' );
1218                 $this->setArticleFlag( false );
1219
1220                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1221                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1222                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1223                 $this->addHTML( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
1224
1225                 # Don't return to the main page if the user can't read it
1226                 # otherwise we'll end up in a pointless loop
1227                 $mainPage = Title::newMainPage();
1228                 if( $mainPage->userCanRead() )
1229                         $this->returnToMain( null, $mainPage );
1230         }
1231
1232         /** @deprecated */
1233         public function databaseError( $fname, $sql, $error, $errno ) {
1234                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1235         }
1236
1237         /**
1238          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1239          * @return string The wikitext error-messages, formatted into a list.
1240          */
1241         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1242                 if ($action == null) {
1243                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1244                 } else {
1245                         global $wgLang;
1246                         $action_desc = wfMsg( "action-$action" );
1247                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1248                 }
1249
1250                 if (count( $errors ) > 1) {
1251                         $text .= '<ul class="permissions-errors">' . "\n";
1252
1253                         foreach( $errors as $error )
1254                         {
1255                                 $text .= '<li>';
1256                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1257                                 $text .= "</li>\n";
1258                         }
1259                         $text .= '</ul>';
1260                 } else {
1261                         $text .= '<div class="permissions-errors">' . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . '</div>';
1262                 }
1263
1264                 return $text;
1265         }
1266
1267         /**
1268          * Display a page stating that the Wiki is in read-only mode,
1269          * and optionally show the source of the page that the user
1270          * was trying to edit.  Should only be called (for this
1271          * purpose) after wfReadOnly() has returned true.
1272          *
1273          * For historical reasons, this function is _also_ used to
1274          * show the error message when a user tries to edit a page
1275          * they are not allowed to edit.  (Unless it's because they're
1276          * blocked, then we show blockedPage() instead.)  In this
1277          * case, the second parameter should be set to true and a list
1278          * of reasons supplied as the third parameter.
1279          *
1280          * @todo Needs to be split into multiple functions.
1281          *
1282          * @param string $source    Source code to show (or null).
1283          * @param bool   $protected Is this a permissions error?
1284          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1285          */
1286         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1287                 global $wgUser, $wgTitle;
1288                 $skin = $wgUser->getSkin();
1289
1290                 $this->setRobotPolicy( 'noindex,nofollow' );
1291                 $this->setArticleRelated( false );
1292
1293                 // If no reason is given, just supply a default "I can't let you do
1294                 // that, Dave" message.  Should only occur if called by legacy code.
1295                 if ( $protected && empty($reasons) ) {
1296                         $reasons[] = array( 'badaccess-group0' );
1297                 }
1298
1299                 if ( !empty($reasons) ) {
1300                         // Permissions error
1301                         if( $source ) {
1302                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1303                                 $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
1304                         } else {
1305                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1306                         }
1307                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1308                 } else {
1309                         // Wiki is read only
1310                         $this->setPageTitle( wfMsg( 'readonly' ) );
1311                         $reason = wfReadOnlyReason();
1312                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1313                 }
1314
1315                 // Show source, if supplied
1316                 if( is_string( $source ) ) {
1317                         $this->addWikiMsg( 'viewsourcetext' );
1318                         $text = Xml::openElement( 'textarea',
1319                                                 array( 'id'   => 'wpTextbox1',
1320                                                        'name' => 'wpTextbox1',
1321                                                        'cols' => $wgUser->getOption( 'cols' ),
1322                                                        'rows' => $wgUser->getOption( 'rows' ),
1323                                                        'readonly' => 'readonly' ) );
1324                         $text .= htmlspecialchars( $source );
1325                         $text .= Xml::closeElement( 'textarea' );
1326                         $this->addHTML( $text );
1327
1328                         // Show templates used by this article
1329                         $skin = $wgUser->getSkin();
1330                         $article = new Article( $wgTitle );
1331                         $this->addHTML( "<div class='templatesUsed'>
1332 {$skin->formatTemplates( $article->getUsedTemplates() )}
1333 </div>
1334 " );
1335                 }
1336
1337                 # If the title doesn't exist, it's fairly pointless to print a return
1338                 # link to it.  After all, you just tried editing it and couldn't, so
1339                 # what's there to do there?
1340                 if( $wgTitle->exists() ) {
1341                         $this->returnToMain( null, $wgTitle );
1342                 }
1343         }
1344
1345         /** @deprecated */
1346         public function fatalError( $message ) {
1347                 wfDeprecated( __METHOD__ );
1348                 throw new FatalError( $message );
1349         }
1350
1351         /** @deprecated */
1352         public function unexpectedValueError( $name, $val ) {
1353                 wfDeprecated( __METHOD__ );
1354                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1355         }
1356
1357         /** @deprecated */
1358         public function fileCopyError( $old, $new ) {
1359                 wfDeprecated( __METHOD__ );
1360                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1361         }
1362
1363         /** @deprecated */
1364         public function fileRenameError( $old, $new ) {
1365                 wfDeprecated( __METHOD__ );
1366                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1367         }
1368
1369         /** @deprecated */
1370         public function fileDeleteError( $name ) {
1371                 wfDeprecated( __METHOD__ );
1372                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1373         }
1374
1375         /** @deprecated */
1376         public function fileNotFoundError( $name ) {
1377                 wfDeprecated( __METHOD__ );
1378                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1379         }
1380
1381         public function showFatalError( $message ) {
1382                 $this->setPageTitle( wfMsg( "internalerror" ) );
1383                 $this->setRobotPolicy( "noindex,nofollow" );
1384                 $this->setArticleRelated( false );
1385                 $this->enableClientCache( false );
1386                 $this->mRedirect = '';
1387                 $this->mBodytext = $message;
1388         }
1389
1390         public function showUnexpectedValueError( $name, $val ) {
1391                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1392         }
1393
1394         public function showFileCopyError( $old, $new ) {
1395                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1396         }
1397
1398         public function showFileRenameError( $old, $new ) {
1399                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1400         }
1401
1402         public function showFileDeleteError( $name ) {
1403                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1404         }
1405
1406         public function showFileNotFoundError( $name ) {
1407                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1408         }
1409
1410         /**
1411          * Add a "return to" link pointing to a specified title
1412          *
1413          * @param Title $title Title to link
1414          */
1415         public function addReturnTo( $title ) {
1416                 global $wgUser;
1417                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1418                 $link = wfMsg( 'returnto', $wgUser->getSkin()->makeLinkObj( $title ) );
1419                 $this->addHTML( "<p>{$link}</p>\n" );
1420         }
1421
1422         /**
1423          * Add a "return to" link pointing to a specified title,
1424          * or the title indicated in the request, or else the main page
1425          *
1426          * @param null $unused No longer used
1427          * @param Title $returnto Title to return to
1428          */
1429         public function returnToMain( $unused = null, $returnto = NULL ) {
1430                 global $wgRequest;
1431
1432                 if ( $returnto == NULL ) {
1433                         $returnto = $wgRequest->getText( 'returnto' );
1434                 }
1435
1436                 if ( '' === $returnto ) {
1437                         $returnto = Title::newMainPage();
1438                 }
1439
1440                 if ( is_object( $returnto ) ) {
1441                         $titleObj = $returnto;
1442                 } else {
1443                         $titleObj = Title::newFromText( $returnto );
1444                 }
1445                 if ( !is_object( $titleObj ) ) {
1446                         $titleObj = Title::newMainPage();
1447                 }
1448
1449                 $this->addReturnTo( $titleObj );
1450         }
1451
1452         /**
1453          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1454          * and uses the first 10 of them for META keywords
1455          *
1456          * @param ParserOutput &$parserOutput
1457          */
1458         private function addKeywords( &$parserOutput ) {
1459                 global $wgTitle;
1460                 $this->addKeyword( $wgTitle->getPrefixedText() );
1461                 $count = 1;
1462                 $links2d =& $parserOutput->getLinks();
1463                 if ( !is_array( $links2d ) ) {
1464                         return;
1465                 }
1466                 foreach ( $links2d as $dbkeys ) {
1467                         foreach( $dbkeys as $dbkey => $unused ) {
1468                                 $this->addKeyword( $dbkey );
1469                                 if ( ++$count > 10 ) {
1470                                         break 2;
1471                                 }
1472                         }
1473                 }
1474         }
1475
1476         /**
1477          * @return string The doctype, opening <html>, and head element.
1478          */
1479         public function headElement( Skin $sk ) {
1480                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1481                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1482                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1483
1484                 $this->addMeta( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" );
1485                 $this->addStyle( 'common/wikiprintable.css', 'print' );
1486                 $sk->setupUserCss( $this );
1487
1488                 $ret = '';
1489
1490                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1491                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1492                 }
1493
1494                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1495
1496                 if ( '' == $this->getHTMLTitle() ) {
1497                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1498                 }
1499
1500                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1501                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1502                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1503                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1504                 }
1505                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1506                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n\t\t";
1507                 $ret .= implode( "\t\t", array(
1508                         $this->getHeadLinks(),
1509                         $this->buildCssLinks(),
1510                         $sk->getHeadScripts( $this->mAllowUserJs ),
1511                         $this->mScripts,
1512                         $this->getHeadItems(),
1513                 ));
1514                 if( $sk->usercss ){
1515                         $ret .= "<style type='text/css'>{$sk->usercss}</style>";
1516                 }
1517
1518                 if ($wgUseTrackbacks && $this->isArticleRelated())
1519                         $ret .= $wgTitle->trackbackRDF();
1520
1521                 $ret .= "</head>\n";
1522                 return $ret;
1523         }
1524
1525         protected function addDefaultMeta() {
1526                 global $wgVersion;
1527                 $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1528                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1529
1530                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1531                 if( $p !== 'index,follow' ) {
1532                         // http://www.robotstxt.org/wc/meta-user.html
1533                         // Only show if it's different from the default robots policy
1534                         $this->addMeta( 'robots', $p );
1535                 }
1536
1537                 if ( count( $this->mKeywords ) > 0 ) {
1538                         $strip = array(
1539                                 "/<.*?" . ">/" => '',
1540                                 "/_/" => ' '
1541                         );
1542                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1543                 }
1544         }
1545
1546         /**
1547          * @return string HTML tag links to be put in the header.
1548          */
1549         public function getHeadLinks() {
1550                 global $wgRequest, $wgFeed;
1551
1552                 // Ideally this should happen earlier, somewhere. :P
1553                 $this->addDefaultMeta();
1554
1555                 $tags = array();
1556
1557                 foreach ( $this->mMetatags as $tag ) {
1558                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1559                                 $a = 'http-equiv';
1560                                 $tag[0] = substr( $tag[0], 5 );
1561                         } else {
1562                                 $a = 'name';
1563                         }
1564                         $tags[] = Xml::element( 'meta',
1565                                 array(
1566                                         $a => $tag[0],
1567                                         'content' => $tag[1] ) );
1568                 }
1569                 foreach ( $this->mLinktags as $tag ) {
1570                         $tags[] = Xml::element( 'link', $tag );
1571                 }
1572
1573                 if( $wgFeed ) {
1574                         global $wgTitle;
1575                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1576                                 # Use the page name for the title (accessed through $wgTitle since
1577                                 # there's no other way).  In principle, this could lead to issues
1578                                 # with having the same name for different feeds corresponding to
1579                                 # the same page, but we can't avoid that at this low a level.
1580
1581                                 $tags[] = $this->feedLink(
1582                                         $format,
1583                                         $link,
1584                                         wfMsg( "page-{$format}-feed", $wgTitle->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1585                         }
1586
1587                         # Recent changes feed should appear on every page (except recentchanges,
1588                         # that would be redundant). Put it after the per-page feed to avoid
1589                         # changing existing behavior. It's still available, probably via a
1590                         # menu in your browser. Some sites might have a different feed they'd
1591                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1592                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1593                         # If so, use it instead.
1594
1595                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses;
1596                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1597
1598                         if ( $wgOverrideSiteFeed ) {
1599                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1600                                         $tags[] = $this->feedLink (
1601                                                 $type,
1602                                                 htmlspecialchars( $feedUrl ),
1603                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1604                                 }
1605                         }
1606                         else if ( $wgTitle->getPrefixedText() != $rctitle->getPrefixedText() ) {
1607                                 foreach( $wgFeedClasses as $format => $class ) {
1608                                         $tags[] = $this->feedLink(
1609                                                 $format,
1610                                                 $rctitle->getLocalURL( "feed={$format}" ),
1611                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1612                                 }
1613                         }
1614                 }
1615
1616                 return implode( "\n\t\t", $tags ) . "\n";
1617         }
1618
1619         /**
1620          * Return URLs for each supported syndication format for this page.
1621          * @return array associating format keys with URLs
1622          */
1623         public function getSyndicationLinks() {
1624                 global $wgTitle, $wgFeedClasses;
1625                 $links = array();
1626
1627                 if( $this->isSyndicated() ) {
1628                         if( is_string( $this->getFeedAppendQuery() ) ) {
1629                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1630                         } else {
1631                                 $appendQuery = "";
1632                         }
1633
1634                         foreach( $wgFeedClasses as $format => $class ) {
1635                                 $links[$format] = $wgTitle->getLocalUrl( "feed=$format{$appendQuery}" );
1636                         }
1637                 }
1638                 return $links;
1639         }
1640
1641         /**
1642          * Generate a <link rel/> for an RSS feed.
1643          */
1644         private function feedLink( $type, $url, $text ) {
1645                 return Xml::element( 'link', array(
1646                         'rel' => 'alternate',
1647                         'type' => "application/$type+xml",
1648                         'title' => $text,
1649                         'href' => $url ) );
1650         }
1651
1652         /**
1653          * Add a local or specified stylesheet, with the given media options.
1654          * Meant primarily for internal use...
1655          *
1656          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1657          * @param $conditional -- for IE conditional comments, specifying an IE version
1658          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1659          */
1660         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1661                 $options = array();
1662                 if( $media )
1663                         $options['media'] = $media;
1664                 if( $condition )
1665                         $options['condition'] = $condition;
1666                 if( $dir )
1667                         $options['dir'] = $dir;
1668                 $this->styles[$style] = $options;
1669         }
1670
1671         /**
1672          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1673          * These will be applied to various media & IE conditionals.
1674          */
1675         public function buildCssLinks() {
1676                 $links = array();
1677                 foreach( $this->styles as $file => $options ) {
1678                         $link = $this->styleLink( $file, $options );
1679                         if( $link )
1680                                 $links[] = $link;
1681                 }
1682
1683                 return implode( "\n\t\t", $links );
1684         }
1685
1686         protected function styleLink( $style, $options ) {
1687                 global $wgRequest;
1688
1689                 if( isset( $options['dir'] ) ) {
1690                         global $wgContLang;
1691                         $siteDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1692                         if( $siteDir != $options['dir'] )
1693                                 return '';
1694                 }
1695
1696                 if( isset( $options['media'] ) ) {
1697                         $media = $this->transformCssMedia( $options['media'] );
1698                         if( is_null( $media ) ) {
1699                                 return '';
1700                         }
1701                 } else {
1702                         $media = '';
1703                 }
1704
1705                 if( substr( $style, 0, 1 ) == '/' ||
1706                         substr( $style, 0, 5 ) == 'http:' ||
1707                         substr( $style, 0, 6 ) == 'https:' ) {
1708                         $url = $style;
1709                 } else {
1710                         global $wgStylePath, $wgStyleVersion;
1711                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1712                 }
1713
1714                 $attribs = array(
1715                         'rel' => 'stylesheet',
1716                         'href' => $url,
1717                         'type' => 'text/css' );
1718                 if( $media ) {
1719                         $attribs['media'] = $media;
1720                 }
1721
1722                 $link = Xml::element( 'link', $attribs );
1723
1724                 if( isset( $options['condition'] ) ) {
1725                         $condition = htmlspecialchars( $options['condition'] );
1726                         $link = "<!--[if $condition]>$link<![endif]-->";
1727                 }
1728                 return $link;
1729         }
1730
1731         function transformCssMedia( $media ) {
1732                 global $wgRequest, $wgHandheldForIPhone;
1733
1734                 // Switch in on-screen display for media testing
1735                 $switches = array(
1736                         'printable' => 'print',
1737                         'handheld' => 'handheld',
1738                 );
1739                 foreach( $switches as $switch => $targetMedia ) {
1740                         if( $wgRequest->getBool( $switch ) ) {
1741                                 if( $media == $targetMedia ) {
1742                                         $media = '';
1743                                 } elseif( $media == 'screen' ) {
1744                                         return null;
1745                                 }
1746                         }
1747                 }
1748
1749                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1750                 if( $wgHandheldForIPhone ) {
1751                         $mediaAliases = array(
1752                                 'screen' => 'screen and (min-device-width: 481px)',
1753                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1754                         );
1755
1756                         if( isset( $mediaAliases[$media] ) ) {
1757                                 $media = $mediaAliases[$media];
1758                         }
1759                 }
1760
1761                 return $media;
1762         }
1763
1764         /**
1765          * Turn off regular page output and return an error reponse
1766          * for when rate limiting has triggered.
1767          */
1768         public function rateLimited() {
1769                 global $wgTitle;
1770
1771                 $this->setPageTitle(wfMsg('actionthrottled'));
1772                 $this->setRobotPolicy( 'noindex,follow' );
1773                 $this->setArticleRelated( false );
1774                 $this->enableClientCache( false );
1775                 $this->mRedirect = '';
1776                 $this->clearHTML();
1777                 $this->setStatusCode(503);
1778                 $this->addWikiMsg( 'actionthrottledtext' );
1779
1780                 $this->returnToMain( null, $wgTitle );
1781         }
1782
1783         /**
1784          * Show an "add new section" link?
1785          *
1786          * @return bool
1787          */
1788         public function showNewSectionLink() {
1789                 return $this->mNewSectionLink;
1790         }
1791
1792         /**
1793         * Forcibly hide the new section link?
1794         *
1795         * @return bool
1796         */
1797         public function forceHideNewSectionLink() {
1798                 return $this->mHideNewSectionLink;
1799         }
1800
1801         /**
1802          * Show a warning about slave lag
1803          *
1804          * If the lag is higher than $wgSlaveLagCritical seconds,
1805          * then the warning is a bit more obvious. If the lag is
1806          * lower than $wgSlaveLagWarning, then no warning is shown.
1807          *
1808          * @param int $lag Slave lag
1809          */
1810         public function showLagWarning( $lag ) {
1811                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1812                 if( $lag >= $wgSlaveLagWarning ) {
1813                         $message = $lag < $wgSlaveLagCritical
1814                                 ? 'lag-warn-normal'
1815                                 : 'lag-warn-high';
1816                         $warning = wfMsgExt( $message, 'parse', $lag );
1817                         $this->addHTML( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1818                 }
1819         }
1820
1821         /**
1822          * Add a wikitext-formatted message to the output.
1823          * This is equivalent to:
1824          *
1825          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
1826          */
1827         public function addWikiMsg( /*...*/ ) {
1828                 $args = func_get_args();
1829                 $name = array_shift( $args );
1830                 $this->addWikiMsgArray( $name, $args );
1831         }
1832
1833         /**
1834          * Add a wikitext-formatted message to the output.
1835          * Like addWikiMsg() except the parameters are taken as an array
1836          * instead of a variable argument list.
1837          *
1838          * $options is passed through to wfMsgExt(), see that function for details.
1839          */
1840         public function addWikiMsgArray( $name, $args, $options = array() ) {
1841                 $options[] = 'parse';
1842                 $text = wfMsgExt( $name, $options, $args );
1843                 $this->addHTML( $text );
1844         }
1845
1846         /**
1847          * This function takes a number of message/argument specifications, wraps them in
1848          * some overall structure, and then parses the result and adds it to the output.
1849          *
1850          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
1851          * on. The subsequent arguments may either be strings, in which case they are the
1852          * message names, or an arrays, in which case the first element is the message name,
1853          * and subsequent elements are the parameters to that message.
1854          *
1855          * The special named parameter 'options' in a message specification array is passed
1856          * through to the $options parameter of wfMsgExt().
1857          *
1858          * Don't use this for messages that are not in users interface language.
1859          *
1860          * For example:
1861          *
1862          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
1863          *
1864          * Is equivalent to:
1865          *
1866          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
1867          */
1868         public function wrapWikiMsg( $wrap /*, ...*/ ) {
1869                 $msgSpecs = func_get_args();
1870                 array_shift( $msgSpecs );
1871                 $msgSpecs = array_values( $msgSpecs );
1872                 $s = $wrap;
1873                 foreach ( $msgSpecs as $n => $spec ) {
1874                         $options = array();
1875                         if ( is_array( $spec ) ) {
1876                                 $args = $spec;
1877                                 $name = array_shift( $args );
1878                                 if ( isset( $args['options'] ) ) {
1879                                         $options = $args['options'];
1880                                         unset( $args['options'] );
1881                                 }
1882                         }  else {
1883                                 $args = array();
1884                                 $name = $spec;
1885                         }
1886                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
1887                 }
1888                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
1889         }
1890 }