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