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(), $mCategories = array(), $mLanguageLinks = array();
  16
  17         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  18         var $mInlineMsg = array();
  19
  20         var $mTemplateIds = array();
  21
  22         var $mAllowUserJs;
  23         var $mSuppressQuickbar = false;
  24         var $mDoNothing = false;
  25         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  26         var $mIsArticleRelated = true;
  27         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  28
  29         var $mFeedLinks = array();
  30
  31         var $mEnableClientCache = true;
  32         var $mArticleBodyOnly = false;
  33
  34         var $mNewSectionLink = false;
  35         var $mHideNewSectionLink = false;
  36         var $mNoGallery = false;
  37         var $mPageTitleActionText = '';
  38         var $mParseWarnings = array();
  39         var $mSquidMaxage = 0;
  40         var $mRevisionId = null;
  41         protected $mTitle = null;
  42
  43         /**
  44          * An array of stylesheet filenames (relative from skins path), with options
  45          * for CSS media, IE conditions, and RTL/LTR direction.
  46          * For internal use; add settings in the skin via $this->addStyle()
  47          */
  48         var $styles = array();
  49
  50         /**
  51          * Whether to load jQuery core.
  52          */
  53         protected $mJQueryDone = false;
  54
  55         private $mIndexPolicy = 'index';
  56         private $mFollowPolicy = 'follow';
  57         private $mVaryHeader = array( 'Accept-Encoding' => array('list-contains=gzip'),
  58                                                                   'Cookie' => null );
  59
  60
  61         /**
  62          * Constructor
  63          * Initialise private variables
  64          */
  65         function __construct() {
  66                 global $wgAllowUserJs;
  67                 $this->mAllowUserJs = $wgAllowUserJs;
  68         }
  69
  70         /**
  71          * Redirect to $url rather than displaying the normal page
  72          *
  73          * @param $url String: URL
  74          * @param $responsecode String: HTTP status code
  75          */
  76         public function redirect( $url, $responsecode = '302' ) {
  77                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  78                 $this->mRedirect = str_replace( "\n", '', $url );
  79                 $this->mRedirectCode = $responsecode;
  80         }
  81
  82         /**
  83          * Get the URL to redirect to, or an empty string if not redirect URL set
  84          *
  85          * @return String
  86          */
  87         public function getRedirect() {
  88                 return $this->mRedirect;
  89         }
  90
  91         /**
  92          * Set the HTTP status code to send with the output.
  93          *
  94          * @param $statusCode Integer
  95          * @return nothing
  96          */
  97         public function setStatusCode( $statusCode ) {
  98                 $this->mStatusCode = $statusCode;
  99         }
 100
 101
 102         /**
 103          * Add a new <meta> tag
 104          * To add an http-equiv meta tag, precede the name with "http:"
 105          *
 106          * @param $name tag name
 107          * @param $val tag value
 108          */
 109         function addMeta( $name, $val ) {
 110                 array_push( $this->mMetatags, array( $name, $val ) );
 111         }
 112
 113         /**
 114          * Add a keyword or a list of keywords in the page header
 115          *
 116          * @param $text String or array of strings
 117          */
 118         function addKeyword( $text ) {
 119                 if( is_array( $text ) ) {
 120                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 121                 } else {
 122                         array_push( $this->mKeywords, $text );
 123                 }
 124         }
 125
 126         /**
 127          * Add a new \<link\> tag to the page header
 128          *
 129          * @param $linkarr Array: associative array of attributes.
 130          */
 131         function addLink( $linkarr ) {
 132                 array_push( $this->mLinktags, $linkarr );
 133         }
 134
 135         /**
 136          * Add a new \<link\> with "rel" attribute set to "meta"
 137          *
 138          * @param $linkarr Array: associative array mapping attribute names to their
 139          *                 values, both keys and values will be escaped, and the
 140          *                 "rel" attribute will be automatically added
 141          */
 142         function addMetadataLink( $linkarr ) {
 143                 # note: buggy CC software only reads first "meta" link
 144                 static $haveMeta = false;
 145                 $linkarr['rel'] = $haveMeta ? 'alternate meta' : 'meta';
 146                 $this->addLink( $linkarr );
 147                 $haveMeta = true;
 148         }
 149
 150
 151         /**
 152          * Add raw HTML to the list of scripts (including \<script\> tag, etc.)
 153          *
 154          * @param $script String: raw HTML
 155          */
 156         function addScript( $script ) {
 157                 $this->mScripts .= $script . "\n";
 158         }
 159
 160         /**
 161          * Register and add a stylesheet from an extension directory.
 162          *
 163          * @param $url String path to sheet.  Provide either a full url (beginning
 164          *             with 'http', etc) or a relative path from the document root
 165          *             (beginning with '/').  Otherwise it behaves identically to
 166          *             addStyle() and draws from the /skins folder.
 167          */
 168         public function addExtensionStyle( $url ) {
 169                 array_push( $this->mExtStyles, $url );
 170         }
 171
 172         /**
 173          * Get all links added by extensions
 174          *
 175          * @return Array
 176          */
 177         function getExtStyle() {
 178                 return $this->mExtStyles;
 179         }
 180
 181         /**
 182          * Add a JavaScript file out of skins/common, or a given relative path.
 183          *
 184          * @param $file String: filename in skins/common or complete on-server path
 185          *              (/foo/bar.js)
 186          */
 187         public function addScriptFile( $file ) {
 188                 global $wgStylePath, $wgStyleVersion;
 189                 if( substr( $file, 0, 1 ) == '/' ) {
 190                         $path = $file;
 191                 } else {
 192                         $path =  "{$wgStylePath}/common/{$file}";
 193                 }
 194                 $this->addScript( Html::linkedScript( "$path?$wgStyleVersion" ) );
 195         }
 196
 197         /**
 198          * Add a self-contained script tag with the given contents
 199          *
 200          * @param $script String: JavaScript text, no <script> tags
 201          */
 202         public function addInlineScript( $script ) {
 203                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 204         }
 205
 206         /**
 207          * Get all registered JS and CSS tags for the header.
 208          *
 209          * @return String
 210          */
 211         function getScript() {
 212                 return $this->mScripts . $this->getHeadItems();
 213         }
 214
 215         /**
 216          * Get all header items in a string
 217          *
 218          * @return String
 219          */
 220         function getHeadItems() {
 221                 $s = '';
 222                 foreach ( $this->mHeadItems as $item ) {
 223                         $s .= $item;
 224                 }
 225                 return $s;
 226         }
 227
 228         /**
 229          * Add or replace an header item to the output
 230          *
 231          * @param $name String: item name
 232          * @param $value String: raw HTML
 233          */
 234         public function addHeadItem( $name, $value ) {
 235                 $this->mHeadItems[$name] = $value;
 236         }
 237
 238         /**
 239          * Check if the header item $name is already set
 240          *
 241          * @param $name String: item name
 242          * @return Boolean
 243          */
 244         public function hasHeadItem( $name ) {
 245                 return isset( $this->mHeadItems[$name] );
 246         }
 247
 248         /**
 249          * Set the value of the ETag HTTP header, only used if $wgUseETag is true
 250          *
 251          * @param $tag String: value of "ETag" header
 252          */
 253         function setETag( $tag ) {
 254                 $this->mETag = $tag;
 255         }
 256
 257         /**
 258          * Set whether the output should only contain the body of the article,
 259          * without any skin, sidebar, etc.
 260          * Used e.g. when calling with "action=raw".
 261          *
 262          * @param $only Boolean: whether to output only the body of the article
 263          */
 264         public function setArticleBodyOnly( $only ) {
 265                 $this->mArticleBodyOnly = $only;
 266         }
 267
 268         /**
 269          * Return whether the output will contain only the body of the article
 270          *
 271          * @return Boolean
 272          */
 273         public function getArticleBodyOnly() {
 274                 return $this->mArticleBodyOnly;
 275         }
 276
 277
 278         /**
 279          * checkLastModified tells the client to use the client-cached page if
 280          * possible. If sucessful, the OutputPage is disabled so that
 281          * any future call to OutputPage->output() have no effect.
 282          *
 283          * Side effect: sets mLastModified for Last-Modified header
 284          *
 285          * @return Boolean: true iff cache-ok headers was sent.
 286          */
 287         public function checkLastModified( $timestamp ) {
 288                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 289
 290                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 291                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 292                         return false;
 293                 }
 294                 if( !$wgCachePages ) {
 295                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 296                         return false;
 297                 }
 298                 if( $wgUser->getOption( 'nocache' ) ) {
 299                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 300                         return false;
 301                 }
 302
 303                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 304                 $modifiedTimes = array(
 305                         'page' => $timestamp,
 306                         'user' => $wgUser->getTouched(),
 307                         'epoch' => $wgCacheEpoch
 308                 );
 309                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 310
 311                 $maxModified = max( $modifiedTimes );
 312                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 313
 314                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 315                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 316                         return false;
 317                 }
 318
 319                 # Make debug info
 320                 $info = '';
 321                 foreach ( $modifiedTimes as $name => $value ) {
 322                         if ( $info !== '' ) {
 323                                 $info .= ', ';
 324                         }
 325                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 326                 }
 327
 328                 # IE sends sizes after the date like this:
 329                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 330                 # this breaks strtotime().
 331                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 332
 333                 wfSuppressWarnings(); // E_STRICT system time bitching
 334                 $clientHeaderTime = strtotime( $clientHeader );
 335                 wfRestoreWarnings();
 336                 if ( !$clientHeaderTime ) {
 337                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 338                         return false;
 339                 }
 340                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 341
 342                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 343                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 344                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 345                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 346                 if( $clientHeaderTime < $maxModified ) {
 347                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 348                         return false;
 349                 }
 350
 351                 # Not modified
 352                 # Give a 304 response code and disable body output
 353                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 354                 ini_set('zlib.output_compression', 0);
 355                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 356                 $this->sendCacheControl();
 357                 $this->disable();
 358
 359                 // Don't output a compressed blob when using ob_gzhandler;
 360                 // it's technically against HTTP spec and seems to confuse
 361                 // Firefox when the response gets split over two packets.
 362                 wfClearOutputBuffers();
 363
 364                 return true;
 365         }
 366
 367
 368         /**
 369          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 370          *
 371          * @param $policy String: the literal string to output as the contents of
 372          *   the meta tag.  Will be parsed according to the spec and output in
 373          *   standardized form.
 374          * @return null
 375          */
 376         public function setRobotPolicy( $policy ) {
 377                 $policy = Article::formatRobotPolicy( $policy );
 378
 379                 if( isset( $policy['index'] ) ){
 380                         $this->setIndexPolicy( $policy['index'] );
 381                 }
 382                 if( isset( $policy['follow'] ) ){
 383                         $this->setFollowPolicy( $policy['follow'] );
 384                 }
 385         }
 386
 387         /**
 388          * Set the index policy for the page, but leave the follow policy un-
 389          * touched.
 390          *
 391          * @param $policy string Either 'index' or 'noindex'.
 392          * @return null
 393          */
 394         public function setIndexPolicy( $policy ) {
 395                 $policy = trim( $policy );
 396                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 397                         $this->mIndexPolicy = $policy;
 398                 }
 399         }
 400
 401         /**
 402          * Set the follow policy for the page, but leave the index policy un-
 403          * touched.
 404          *
 405          * @param $policy String: either 'follow' or 'nofollow'.
 406          * @return null
 407          */
 408         public function setFollowPolicy( $policy ) {
 409                 $policy = trim( $policy );
 410                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 411                         $this->mFollowPolicy = $policy;
 412                 }
 413         }
 414
 415
 416         /**
 417          * Set the new value of the "action text", this will be added to the
 418          * "HTML title", separated from it with " - ".
 419          *
 420          * @param $text String: new value of the "action text"
 421          */
 422         public function setPageTitleActionText( $text ) {
 423                 $this->mPageTitleActionText = $text;
 424         }
 425
 426         /**
 427          * Get the value of the "action text"
 428          *
 429          * @return String
 430          */
 431         public function getPageTitleActionText() {
 432                 if ( isset( $this->mPageTitleActionText ) ) {
 433                         return $this->mPageTitleActionText;
 434                 }
 435         }
 436
 437         /**
 438          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 439          */
 440         public function setHTMLTitle( $name ) {
 441                 $this->mHTMLtitle = $name;
 442         }
 443
 444         /**
 445          * Return the "HTML title", i.e. the content of the <title> tag.
 446          *
 447          * @return String
 448          */
 449         public function getHTMLTitle() {
 450                 return $this->mHTMLtitle;
 451         }
 452
 453         /**
 454          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 455          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 456          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 457          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 458          */
 459         public function setPageTitle( $name ) {
 460                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 461                 # but leave "<i>foobar</i>" alone
 462                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 463                 $this->mPagetitle = $nameWithTags;
 464
 465                 $taction =  $this->getPageTitleActionText();
 466                 if( !empty( $taction ) ) {
 467                         $name .= ' - '.$taction;
 468                 }
 469
 470                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 471                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 472         }
 473
 474         /**
 475          * Return the "page title", i.e. the content of the <h1> tag.
 476          *
 477          * @return String
 478          */
 479         public function getPageTitle() {
 480                 return $this->mPagetitle;
 481         }
 482
 483         /**
 484          * Set the Title object to use
 485          *
 486          * @param $t Title object
 487          */
 488         public function setTitle( $t ) {
 489                 $this->mTitle = $t;
 490         }
 491
 492         /**
 493          * Get the Title object used in this instance
 494          *
 495          * @return Title
 496          */
 497         public function getTitle() {
 498                 if ( $this->mTitle instanceof Title ) {
 499                         return $this->mTitle;
 500                 } else {
 501                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 502                         global $wgTitle;
 503                         return $wgTitle;
 504                 }
 505         }
 506
 507         /**
 508          * Replace the subtile with $str
 509          *
 510          * @param $str String: new value of the subtitle
 511          */
 512         public function setSubtitle( $str ) {
 513                 $this->mSubtitle = /*$this->parse(*/ $str /*)*/; // @bug 2514
 514         }
 515
 516         /**
 517          * Add $str to the subtitle
 518          *
 519          * @param $str String to add to the subtitle
 520          */
 521         public function appendSubtitle( $str ) {
 522                 $this->mSubtitle .= /*$this->parse(*/ $str /*)*/; // @bug 2514
 523         }
 524
 525         /**
 526          * Get the subtitle
 527          *
 528          * @return String
 529          */
 530         public function getSubtitle() {
 531                 return $this->mSubtitle;
 532         }
 533
 534
 535         /**
 536          * Set the page as printable, i.e. it'll be displayed with with all
 537          * print styles included
 538          */
 539         public function setPrintable() {
 540                 $this->mPrintable = true;
 541         }
 542
 543         /**
 544          * Return whether the page is "printable"
 545          *
 546          * @return Boolean
 547          */
 548         public function isPrintable() {
 549                 return $this->mPrintable;
 550         }
 551
 552
 553         /**
 554          * Disable output completely, i.e. calling output() will have no effect
 555          */
 556         public function disable() {
 557                 $this->mDoNothing = true;
 558         }
 559
 560         /**
 561          * Return whether the output will be completely disabled
 562          *
 563          * @return Boolean
 564          */
 565         public function isDisabled() {
 566                 return $this->mDoNothing;
 567         }
 568
 569
 570         /**
 571          * Add or remove feed links in the page header
 572          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 573          * for the new version
 574          * @see addFeedLink()
 575          *
 576          * @param $show Boolean: true: add default feeds, false: remove all feeds
 577          */
 578         public function setSyndicated( $show = true ) {
 579                 if ( $show ) {
 580                         $this->setFeedAppendQuery( false );
 581                 } else {
 582                         $this->mFeedLinks = array();
 583                 }
 584         }
 585
 586         /**
 587          * Add default feeds to the page header
 588          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 589          * for the new version
 590          * @see addFeedLink()
 591          *
 592          * @param $val String: query to append to feed links or false to output
 593          *        default links
 594          */
 595         public function setFeedAppendQuery( $val ) {
 596                 global $wgAdvertisedFeedTypes;
 597
 598                 $this->mFeedLinks = array();
 599
 600                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 601                         $query = "feed=$type";
 602                         if ( is_string( $val ) ) {
 603                                 $query .= '&' . $val;
 604                         }
 605                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 606                 }
 607         }
 608
 609         /**
 610          * Add a feed link to the page header
 611          *
 612          * @param $format String: feed type, should be a key of $wgFeedClasses
 613          * @param $href String: URL
 614          */
 615         public function addFeedLink( $format, $href ) {
 616                 $this->mFeedLinks[$format] = $href;
 617         }
 618
 619         /**
 620          * Should we output feed links for this page?
 621          * @return Boolean
 622          */
 623         public function isSyndicated() {
 624                 return count( $this->mFeedLinks ) > 0;
 625         }
 626
 627         /**
 628          * Will currently always return null
 629          *
 630          * @return null
 631          */
 632         public function getFeedAppendQuery() {
 633                 return $this->mFeedLinksAppendQuery;
 634         }
 635
 636         /**
 637          * Set whether the displayed content is related to the source of the
 638          * corresponding article on the wiki
 639          * Setting true will cause the change "article related" toggle to true
 640          *
 641          * @param $v Boolean
 642          */
 643         public function setArticleFlag( $v ) {
 644                 $this->mIsarticle = $v;
 645                 if ( $v ) {
 646                         $this->mIsArticleRelated = $v;
 647                 }
 648         }
 649
 650         /**
 651          * Return whether the content displayed page is related to the source of
 652          * the corresponding article on the wiki
 653          *
 654          * @return Boolean
 655          */
 656         public function isArticle() {
 657                 return $this->mIsarticle;
 658         }
 659
 660         /**
 661          * Set whether this page is related an article on the wiki
 662          * Setting false will cause the change of "article flag" toggle to false
 663          *
 664          * @param $v Boolean
 665          */
 666         public function setArticleRelated( $v ) {
 667                 $this->mIsArticleRelated = $v;
 668                 if ( !$v ) {
 669                         $this->mIsarticle = false;
 670                 }
 671         }
 672
 673         /**
 674          * Return whether this page is related an article on the wiki
 675          *
 676          * @return Boolean
 677          */
 678         public function isArticleRelated() {
 679                 return $this->mIsArticleRelated;
 680         }
 681
 682
 683         /**
 684          * Add new language links
 685          *
 686          * @param $newLinkArray Associative array mapping language code to the page
 687          *                      name
 688          */
 689         public function addLanguageLinks( $newLinkArray ) {
 690                 $this->mLanguageLinks += $newLinkArray;
 691         }
 692
 693         /**
 694          * Reset the language links and add new language links
 695          *
 696          * @param $newLinkArray Associative array mapping language code to the page
 697          *                      name
 698          */
 699         public function setLanguageLinks( $newLinkArray ) {
 700                 $this->mLanguageLinks = $newLinkArray;
 701         }
 702
 703         /**
 704          * Get the list of language links
 705          *
 706          * @return Associative array mapping language code to the page name
 707          */
 708         public function getLanguageLinks() {
 709                 return $this->mLanguageLinks;
 710         }
 711
 712
 713         /**
 714          * Add an array of categories, with names in the keys
 715          *
 716          * @param $categories Associative array mapping category name to its sort key
 717          */
 718         public function addCategoryLinks( $categories ) {
 719                 global $wgUser, $wgContLang;
 720
 721                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 722                         return;
 723                 }
 724
 725                 # Add the links to a LinkBatch
 726                 $arr = array( NS_CATEGORY => $categories );
 727                 $lb = new LinkBatch;
 728                 $lb->setArray( $arr );
 729
 730                 # Fetch existence plus the hiddencat property
 731                 $dbr = wfGetDB( DB_SLAVE );
 732                 $pageTable = $dbr->tableName( 'page' );
 733                 $where = $lb->constructSet( 'page', $dbr );
 734                 $propsTable = $dbr->tableName( 'page_props' );
 735                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 736                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 737                 $res = $dbr->query( $sql, __METHOD__ );
 738
 739                 # Add the results to the link cache
 740                 $lb->addResultToCache( LinkCache::singleton(), $res );
 741
 742                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 743                 $categories = array_combine( array_keys( $categories ),
 744                         array_fill( 0, count( $categories ), 'normal' ) );
 745
 746                 # Mark hidden categories
 747                 foreach ( $res as $row ) {
 748                         if ( isset( $row->pp_value ) ) {
 749                                 $categories[$row->page_title] = 'hidden';
 750                         }
 751                 }
 752
 753                 # Add the remaining categories to the skin
 754                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 755                         $sk = $wgUser->getSkin();
 756                         foreach ( $categories as $category => $type ) {
 757                                 $origcategory = $category;
 758                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 759                                 $wgContLang->findVariantLink( $category, $title, true );
 760                                 if ( $category != $origcategory )
 761                                         if ( array_key_exists( $category, $categories ) )
 762                                                 continue;
 763                                 $text = $wgContLang->convertHtml( $title->getText() );
 764                                 $this->mCategories[] = $title->getText();
 765                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 766                         }
 767                 }
 768         }
 769
 770         /**
 771          * Reset the category links (but not the category list) and add $categories
 772          *
 773          * @param $categories Associative array mapping category name to its sort key
 774          */
 775         public function setCategoryLinks( $categories ) {
 776                 $this->mCategoryLinks = array();
 777                 $this->addCategoryLinks( $categories );
 778         }
 779
 780         /**
 781          * Get the list of category links, in a 2-D array with the following format:
 782          * $arr[$type][] = $link, where $type is either "normal" or "hidden" (for
 783          * hidden categories) and $link a HTML fragment with a link to the category
 784          * page
 785          *
 786          * @return Array
 787          */
 788         public function getCategoryLinks() {
 789                 return $this->mCategoryLinks;
 790         }
 791
 792         /**
 793          * Get the list of category names this page belongs to
 794          *
 795          * @return Array of strings
 796          */
 797         public function getCategories() {
 798                 return $this->mCategories;
 799         }
 800
 801         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 802         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 803
 804         public function disallowUserJs() { $this->mAllowUserJs = false; }
 805         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 806
 807         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 808         public function addHTML( $text ) { $this->mBodytext .= $text; }
 809         public function clearHTML() { $this->mBodytext = ''; }
 810         public function getHTML() { return $this->mBodytext; }
 811         public function debug( $text ) { $this->mDebugtext .= $text; }
 812
 813         /* @deprecated */
 814         public function setParserOptions( $options ) {
 815                 wfDeprecated( __METHOD__ );
 816                 return $this->parserOptions( $options );
 817         }
 818
 819         public function parserOptions( $options = null ) {
 820                 if ( !$this->mParserOptions ) {
 821                         $this->mParserOptions = new ParserOptions;
 822                 }
 823                 return wfSetVar( $this->mParserOptions, $options );
 824         }
 825
 826         /**
 827          * Set the revision ID which will be seen by the wiki text parser
 828          * for things such as embedded {{REVISIONID}} variable use.
 829          * @param mixed $revid an integer, or NULL
 830          * @return mixed previous value
 831          */
 832         public function setRevisionId( $revid ) {
 833                 $val = is_null( $revid ) ? null : intval( $revid );
 834                 return wfSetVar( $this->mRevisionId, $val );
 835         }
 836
 837         public function getRevisionId() {
 838                 return $this->mRevisionId;
 839         }
 840
 841         /**
 842          * Convert wikitext to HTML and add it to the buffer
 843          * Default assumes that the current page title will
 844          * be used.
 845          *
 846          * @param string $text
 847          * @param bool   $linestart
 848          */
 849         public function addWikiText( $text, $linestart = true ) {
 850                 $title = $this->getTitle(); // Work arround E_STRICT
 851                 $this->addWikiTextTitle( $text, $title, $linestart );
 852         }
 853
 854         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 855                 $this->addWikiTextTitle($text, $title, $linestart);
 856         }
 857
 858         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 859                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 860         }
 861
 862         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 863                 global $wgParser;
 864
 865                 wfProfileIn( __METHOD__ );
 866
 867                 wfIncrStats( 'pcache_not_possible' );
 868
 869                 $popts = $this->parserOptions();
 870                 $oldTidy = $popts->setTidy( $tidy );
 871
 872                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 873                         $linestart, true, $this->mRevisionId );
 874
 875                 $popts->setTidy( $oldTidy );
 876
 877                 $this->addParserOutput( $parserOutput );
 878
 879                 wfProfileOut( __METHOD__ );
 880         }
 881
 882         /**
 883          * @todo document
 884          * @param ParserOutput object &$parserOutput
 885          */
 886         public function addParserOutputNoText( &$parserOutput ) {
 887                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 888
 889                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 890                 $this->addCategoryLinks( $parserOutput->getCategories() );
 891                 $this->mNewSectionLink = $parserOutput->getNewSection();
 892                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 893
 894                 $this->mParseWarnings = $parserOutput->getWarnings();
 895                 if ( $parserOutput->getCacheTime() == -1 ) {
 896                         $this->enableClientCache( false );
 897                 }
 898                 $this->mNoGallery = $parserOutput->getNoGallery();
 899                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
 900                 // Versioning...
 901                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 902                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 903                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 904                         } else {
 905                                 $this->mTemplateIds[$ns] = $dbks;
 906                         }
 907                 }
 908                 // Page title
 909                 $title = $parserOutput->getTitleText();
 910                 if ( $title != '' ) {
 911                         $this->setPageTitle( $title );
 912                 }
 913
 914                 // Hooks registered in the object
 915                 global $wgParserOutputHooks;
 916                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 917                         list( $hookName, $data ) = $hookInfo;
 918                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 919                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 920                         }
 921                 }
 922
 923                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 924         }
 925
 926         /**
 927          * @todo document
 928          * @param ParserOutput &$parserOutput
 929          */
 930         function addParserOutput( &$parserOutput ) {
 931                 $this->addParserOutputNoText( $parserOutput );
 932                 $text = $parserOutput->getText();
 933                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 934                 $this->addHTML( $text );
 935         }
 936
 937         /**
 938          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 939          * Saves the text into the parser cache if possible.
 940          *
 941          * @param string  $text
 942          * @param Article $article
 943          * @param bool    $cache
 944          * @deprecated Use Article::outputWikitext
 945          */
 946         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 947                 global $wgParser;
 948
 949                 wfDeprecated( __METHOD__ );
 950
 951                 $popts = $this->parserOptions();
 952                 $popts->setTidy(true);
 953                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 954                         $popts, true, true, $this->mRevisionId );
 955                 $popts->setTidy(false);
 956                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 957                         $parserCache = ParserCache::singleton();
 958                         $parserCache->save( $parserOutput, $article, $popts);
 959                 }
 960
 961                 $this->addParserOutput( $parserOutput );
 962         }
 963
 964         /**
 965          * @deprecated use addWikiTextTidy()
 966          */
 967         public function addSecondaryWikiText( $text, $linestart = true ) {
 968                 wfDeprecated( __METHOD__ );
 969                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 970         }
 971
 972         /**
 973          * Add wikitext with tidy enabled
 974          */
 975         public function addWikiTextTidy(  $text, $linestart = true ) {
 976                 $title = $this->getTitle();
 977                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 978         }
 979
 980
 981         /**
 982          * Add the output of a QuickTemplate to the output buffer
 983          *
 984          * @param QuickTemplate $template
 985          */
 986         public function addTemplate( &$template ) {
 987                 ob_start();
 988                 $template->execute();
 989                 $this->addHTML( ob_get_contents() );
 990                 ob_end_clean();
 991         }
 992
 993         /**
 994          * Parse wikitext and return the HTML.
 995          *
 996          * @param string $text
 997          * @param bool   $linestart Is this the start of a line?
 998          * @param bool   $interface ??
 999          */
1000         public function parse( $text, $linestart = true, $interface = false ) {
1001                 global $wgParser;
1002                 if( is_null( $this->getTitle() ) ) {
1003                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
1004                 }
1005                 $popts = $this->parserOptions();
1006                 if ( $interface) { $popts->setInterfaceMessage(true); }
1007                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
1008                         $linestart, true, $this->mRevisionId );
1009                 if ( $interface) { $popts->setInterfaceMessage(false); }
1010                 return $parserOutput->getText();
1011         }
1012
1013         /** Parse wikitext, strip paragraphs, and return the HTML. */
1014         public function parseInline( $text, $linestart = true, $interface = false ) {
1015                 $parsed = $this->parse( $text, $linestart, $interface );
1016
1017                 $m = array();
1018                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
1019                         $parsed = $m[1];
1020                 }
1021
1022                 return $parsed;
1023         }
1024
1025         /**
1026          * @param Article $article
1027          * @param User    $user
1028          *
1029          * @deprecated
1030          *
1031          * @return bool True if successful, else false.
1032          */
1033         public function tryParserCache( &$article ) {
1034                 wfDeprecated( __METHOD__ );
1035                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
1036
1037                 if ($parserOutput !== false) {
1038                         $this->addParserOutput( $parserOutput );
1039                         return true;
1040                 } else {
1041                         return false;
1042                 }
1043         }
1044
1045         /**
1046          * @param int $maxage Maximum cache time on the Squid, in seconds.
1047          */
1048         public function setSquidMaxage( $maxage ) {
1049                 $this->mSquidMaxage = $maxage;
1050         }
1051
1052         /**
1053          * Use enableClientCache(false) to force it to send nocache headers
1054          * @param $state ??
1055          */
1056         public function enableClientCache( $state ) {
1057                 return wfSetVar( $this->mEnableClientCache, $state );
1058         }
1059
1060         function getCacheVaryCookies() {
1061                 global $wgCookiePrefix, $wgCacheVaryCookies;
1062                 static $cookies;
1063                 if ( $cookies === null ) {
1064                         $cookies = array_merge(
1065                                 array(
1066                                         "{$wgCookiePrefix}Token",
1067                                         "{$wgCookiePrefix}LoggedOut",
1068                                         session_name()
1069                                 ),
1070                                 $wgCacheVaryCookies
1071                         );
1072                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
1073                 }
1074                 return $cookies;
1075         }
1076
1077         function uncacheableBecauseRequestVars() {
1078                 global $wgRequest;
1079                 return  $wgRequest->getText('useskin', false) === false
1080                         && $wgRequest->getText('uselang', false) === false;
1081         }
1082
1083         /**
1084          * Check if the request has a cache-varying cookie header
1085          * If it does, it's very important that we don't allow public caching
1086          */
1087         function haveCacheVaryCookies() {
1088                 global $wgRequest;
1089                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
1090                 if ( $cookieHeader === false ) {
1091                         return false;
1092                 }
1093                 $cvCookies = $this->getCacheVaryCookies();
1094                 foreach ( $cvCookies as $cookieName ) {
1095                         # Check for a simple string match, like the way squid does it
1096                         if ( strpos( $cookieHeader, $cookieName ) ) {
1097                                 wfDebug( __METHOD__.": found $cookieName\n" );
1098                                 return true;
1099                         }
1100                 }
1101                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
1102                 return false;
1103         }
1104
1105         public function addVaryHeader( $header, $option = null ) {
1106                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
1107                         $this->mVaryHeader[$header] = $option;
1108                 }
1109                 elseif( is_array( $option ) ) {
1110                         if( is_array( $this->mVaryHeader[$header] ) ) {
1111                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
1112                         }
1113                         else {
1114                                 $this->mVaryHeader[$header] = $option;
1115                         }
1116                 }
1117                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
1118         }
1119
1120         /** Get a complete X-Vary-Options header */
1121         public function getXVO() {
1122                 $cvCookies = $this->getCacheVaryCookies();
1123
1124                 $cookiesOption = array();
1125                 foreach ( $cvCookies as $cookieName ) {
1126                         $cookiesOption[] = 'string-contains=' . $cookieName;
1127                 }
1128                 $this->addVaryHeader( 'Cookie', $cookiesOption );
1129
1130                 $headers = array();
1131                 foreach( $this->mVaryHeader as $header => $option ) {
1132                         $newheader = $header;
1133                         if( is_array( $option ) )
1134                                 $newheader .= ';' . implode( ';', $option );
1135                         $headers[] = $newheader;
1136                 }
1137                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
1138
1139                 return $xvo;
1140         }
1141
1142         /** bug 21672: Add Accept-Language to Vary and XVO headers
1143                 if there's no 'variant' parameter existed in GET.
1144
1145                 For example:
1146                  /w/index.php?title=Main_page should always be served; but
1147                  /w/index.php?title=Main_page&variant=zh-cn should never be served.
1148
1149                 patched by Liangent and Philip */
1150         function addAcceptLanguage() {
1151                 global $wgRequest, $wgContLang;
1152                 if( !$wgRequest->getCheck('variant') && $wgContLang->hasVariants() ) {
1153                         $variants = $wgContLang->getVariants();
1154                         $aloption = array();
1155                         foreach ( $variants as $variant ) {
1156                                 if( $variant === $wgContLang->getCode() )
1157                                         continue;
1158                                 else
1159                                         $aloption[] = "string-contains=$variant";
1160                         }
1161                         $this->addVaryHeader( 'Accept-Language', $aloption );
1162                 }
1163         }
1164
1165         public function sendCacheControl() {
1166                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
1167
1168                 $response = $wgRequest->response();
1169                 if ($wgUseETag && $this->mETag)
1170                         $response->header("ETag: $this->mETag");
1171
1172                 $this->addAcceptLanguage();
1173
1174                 # don't serve compressed data to clients who can't handle it
1175                 # maintain different caches for logged-in users and non-logged in ones
1176                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
1177
1178                 if ( $wgUseXVO ) {
1179                         # Add an X-Vary-Options header for Squid with Wikimedia patches
1180                         $response->header( $this->getXVO() );
1181                 }
1182
1183                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
1184                         if( $wgUseSquid && session_id() == '' &&
1185                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
1186                         {
1187                                 if ( $wgUseESI ) {
1188                                         # We'll purge the proxy cache explicitly, but require end user agents
1189                                         # to revalidate against the proxy on each visit.
1190                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
1191                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
1192                                         # start with a shorter timeout for initial testing
1193                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
1194                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
1195                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
1196                                 } else {
1197                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
1198                                         # to revalidate against the proxy on each visit.
1199                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
1200                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
1201                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
1202                                         # start with a shorter timeout for initial testing
1203                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
1204                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1205                                 }
1206                         } else {
1207                                 # We do want clients to cache if they can, but they *must* check for updates
1208                                 # on revisiting the page.
1209                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1210                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1211                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1212                         }
1213                         if($this->mLastModified) {
1214                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1215                         }
1216                 } else {
1217                         wfDebug( __METHOD__ . ": no caching **\n", false );
1218
1219                         # In general, the absence of a last modified header should be enough to prevent
1220                         # the client from using its cache. We send a few other things just to make sure.
1221                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1222                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1223                         $response->header( 'Pragma: no-cache' );
1224                 }
1225                 wfRunHooks('CacheHeadersAfterSet', array( $this ) );
1226         }
1227
1228         /**
1229          * Get the message associed with the HTTP response code $code
1230          *
1231          * @param $code Integer: status code
1232          * @return String or null: message or null if $code is not in the list of
1233          *         messages
1234          */
1235         public static function getStatusMessage( $code ) {
1236                 static $statusMessage = array(
1237                         100 => 'Continue',
1238                         101 => 'Switching Protocols',
1239                         102 => 'Processing',
1240                         200 => 'OK',
1241                         201 => 'Created',
1242                         202 => 'Accepted',
1243                         203 => 'Non-Authoritative Information',
1244                         204 => 'No Content',
1245                         205 => 'Reset Content',
1246                         206 => 'Partial Content',
1247                         207 => 'Multi-Status',
1248                         300 => 'Multiple Choices',
1249                         301 => 'Moved Permanently',
1250                         302 => 'Found',
1251                         303 => 'See Other',
1252                         304 => 'Not Modified',
1253                         305 => 'Use Proxy',
1254                         307 => 'Temporary Redirect',
1255                         400 => 'Bad Request',
1256                         401 => 'Unauthorized',
1257                         402 => 'Payment Required',
1258                         403 => 'Forbidden',
1259                         404 => 'Not Found',
1260                         405 => 'Method Not Allowed',
1261                         406 => 'Not Acceptable',
1262                         407 => 'Proxy Authentication Required',
1263                         408 => 'Request Timeout',
1264                         409 => 'Conflict',
1265                         410 => 'Gone',
1266                         411 => 'Length Required',
1267                         412 => 'Precondition Failed',
1268                         413 => 'Request Entity Too Large',
1269                         414 => 'Request-URI Too Large',
1270                         415 => 'Unsupported Media Type',
1271                         416 => 'Request Range Not Satisfiable',
1272                         417 => 'Expectation Failed',
1273                         422 => 'Unprocessable Entity',
1274                         423 => 'Locked',
1275                         424 => 'Failed Dependency',
1276                         500 => 'Internal Server Error',
1277                         501 => 'Not Implemented',
1278                         502 => 'Bad Gateway',
1279                         503 => 'Service Unavailable',
1280                         504 => 'Gateway Timeout',
1281                         505 => 'HTTP Version Not Supported',
1282                         507 => 'Insufficient Storage'
1283                 );
1284                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1285         }
1286
1287         /**
1288          * Finally, all the text has been munged and accumulated into
1289          * the object, let's actually output it:
1290          */
1291         public function output() {
1292                 global $wgUser, $wgOutputEncoding, $wgRequest;
1293                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1294                 global $wgUseAjax, $wgAjaxWatch;
1295                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1296                 global $wgArticle;
1297
1298                 if( $this->mDoNothing ){
1299                         return;
1300                 }
1301                 wfProfileIn( __METHOD__ );
1302                 if ( $this->mRedirect != '' ) {
1303                         # Standards require redirect URLs to be absolute
1304                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1305                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1306                                 if( !$wgDebugRedirects ) {
1307                                         $message = self::getStatusMessage( $this->mRedirectCode );
1308                                         $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1309                                 }
1310                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1311                         }
1312                         $this->sendCacheControl();
1313
1314                         $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
1315                         if( $wgDebugRedirects ) {
1316                                 $url = htmlspecialchars( $this->mRedirect );
1317                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1318                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1319                                 print "</body>\n</html>\n";
1320                         } else {
1321                                 $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
1322                         }
1323                         wfProfileOut( __METHOD__ );
1324                         return;
1325                 } elseif ( $this->mStatusCode ) {
1326                         $message = self::getStatusMessage( $this->mStatusCode );
1327                         if ( $message )
1328                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1329                 }
1330
1331                 $sk = $wgUser->getSkin();
1332
1333                 if ( $wgUseAjax ) {
1334                         $this->addScriptFile( 'ajax.js' );
1335
1336                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1337
1338                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1339                                 $this->addScriptFile( 'ajaxwatch.js' );
1340                         }
1341
1342                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1343                                 $this->addScriptFile( 'mwsuggest.js' );
1344                         }
1345                 }
1346
1347                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1348                         $this->addScriptFile( 'rightclickedit.js' );
1349                 }
1350
1351                 if( $wgUniversalEditButton ) {
1352                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1353                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1354                                 // Original UniversalEditButton
1355                                 $msg = wfMsg('edit');
1356                                 $this->addLink( array(
1357                                         'rel' => 'alternate',
1358                                         'type' => 'application/x-wiki',
1359                                         'title' => $msg,
1360                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1361                                 ) );
1362                                 // Alternate edit link
1363                                 $this->addLink( array(
1364                                         'rel' => 'edit',
1365                                         'title' => $msg,
1366                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1367                                 ) );
1368                         }
1369                 }
1370
1371                 # Buffer output; final headers may depend on later processing
1372                 ob_start();
1373
1374                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1375                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1376
1377                 if ($this->mArticleBodyOnly) {
1378                         $this->out($this->mBodytext);
1379                 } else {
1380                         // Hook that allows last minute changes to the output page, e.g.
1381                         // adding of CSS or Javascript by extensions.
1382                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1383
1384                         wfProfileIn( 'Output-skin' );
1385                         $sk->outputPage( $this );
1386                         wfProfileOut( 'Output-skin' );
1387                 }
1388
1389                 $this->sendCacheControl();
1390                 ob_end_flush();
1391                 wfProfileOut( __METHOD__ );
1392         }
1393
1394         /**
1395          * Actually output something with print(). Performs an iconv to the
1396          * output encoding, if needed.
1397          * @param string $ins The string to output
1398          */
1399         public function out( $ins ) {
1400                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1401                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1402                         $outs = $ins;
1403                 } else {
1404                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1405                         if ( false === $outs ) { $outs = $ins; }
1406                 }
1407                 print $outs;
1408         }
1409
1410         /**
1411          * @todo document
1412          */
1413         public static function setEncodings() {
1414                 global $wgInputEncoding, $wgOutputEncoding;
1415                 global $wgContLang;
1416
1417                 $wgInputEncoding = strtolower( $wgInputEncoding );
1418
1419                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1420                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1421                         return;
1422                 }
1423                 $wgOutputEncoding = $wgInputEncoding;
1424         }
1425
1426         /**
1427          * Deprecated, use wfReportTime() instead.
1428          * @return string
1429          * @deprecated
1430          */
1431         public function reportTime() {
1432                 wfDeprecated( __METHOD__ );
1433                 $time = wfReportTime();
1434                 return $time;
1435         }
1436
1437         /**
1438          * Produce a "user is blocked" page.
1439          *
1440          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1441          * @return nothing
1442          */
1443         function blockedPage( $return = true ) {
1444                 global $wgUser, $wgContLang, $wgLang;
1445
1446                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1447                 $this->setRobotPolicy( 'noindex,nofollow' );
1448                 $this->setArticleRelated( false );
1449
1450                 $name = User::whoIs( $wgUser->blockedBy() );
1451                 $reason = $wgUser->blockedFor();
1452                 if( $reason == '' ) {
1453                         $reason = wfMsg( 'blockednoreason' );
1454                 }
1455                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1456                 $ip = wfGetIP();
1457
1458                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1459
1460                 $blockid = $wgUser->mBlock->mId;
1461
1462                 $blockExpiry = $wgUser->mBlock->mExpiry;
1463                 if ( $blockExpiry == 'infinity' ) {
1464                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1465                         // Search for localization in 'ipboptions'
1466                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1467                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1468                                 if ( strpos( $option, ":" ) === false )
1469                                         continue;
1470                                 list( $show, $value ) = explode( ":", $option );
1471                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1472                                         $blockExpiry = $show;
1473                                         break;
1474                                 }
1475                         }
1476                 } else {
1477                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1478                 }
1479
1480                 if ( $wgUser->mBlock->mAuto ) {
1481                         $msg = 'autoblockedtext';
1482                 } else {
1483                         $msg = 'blockedtext';
1484                 }
1485
1486                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1487                  * This could be a username, an ip range, or a single ip. */
1488                 $intended = $wgUser->mBlock->mAddress;
1489
1490                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1491
1492                 # Don't auto-return to special pages
1493                 if( $return ) {
1494                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1495                         $this->returnToMain( null, $return );
1496                 }
1497         }
1498
1499         /**
1500          * Output a standard error page
1501          *
1502          * @param string $title Message key for page title
1503          * @param string $msg Message key for page text
1504          * @param array $params Message parameters
1505          */
1506         public function showErrorPage( $title, $msg, $params = array() ) {
1507                 if ( $this->getTitle() ) {
1508                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1509                 }
1510                 $this->setPageTitle( wfMsg( $title ) );
1511                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1512                 $this->setRobotPolicy( 'noindex,nofollow' );
1513                 $this->setArticleRelated( false );
1514                 $this->enableClientCache( false );
1515                 $this->mRedirect = '';
1516                 $this->mBodytext = '';
1517
1518                 array_unshift( $params, 'parse' );
1519                 array_unshift( $params, $msg );
1520                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1521
1522                 $this->returnToMain();
1523         }
1524
1525         /**
1526          * Output a standard permission error page
1527          *
1528          * @param array $errors Error message keys
1529          */
1530         public function showPermissionsErrorPage( $errors, $action = null )
1531         {
1532                 $this->mDebugtext .= 'Original title: ' .
1533                 $this->getTitle()->getPrefixedText() . "\n";
1534                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1535                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1536                 $this->setRobotPolicy( 'noindex,nofollow' );
1537                 $this->setArticleRelated( false );
1538                 $this->enableClientCache( false );
1539                 $this->mRedirect = '';
1540                 $this->mBodytext = '';
1541                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1542         }
1543
1544         /** @deprecated */
1545         public function errorpage( $title, $msg ) {
1546                 wfDeprecated( __METHOD__ );
1547                 throw new ErrorPageError( $title, $msg );
1548         }
1549
1550         /**
1551          * Display an error page indicating that a given version of MediaWiki is
1552          * required to use it
1553          *
1554          * @param mixed $version The version of MediaWiki needed to use the page
1555          */
1556         public function versionRequired( $version ) {
1557                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1558                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1559                 $this->setRobotPolicy( 'noindex,nofollow' );
1560                 $this->setArticleRelated( false );
1561                 $this->mBodytext = '';
1562
1563                 $this->addWikiMsg( 'versionrequiredtext', $version );
1564                 $this->returnToMain();
1565         }
1566
1567         /**
1568          * Display an error page noting that a given permission bit is required.
1569          *
1570          * @param string $permission key required
1571          */
1572         public function permissionRequired( $permission ) {
1573                 global $wgLang;
1574
1575                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1576                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1577                 $this->setRobotPolicy( 'noindex,nofollow' );
1578                 $this->setArticleRelated( false );
1579                 $this->mBodytext = '';
1580
1581                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1582                         User::getGroupsWithPermission( $permission ) );
1583                 if( $groups ) {
1584                         $this->addWikiMsg( 'badaccess-groups',
1585                                 $wgLang->commaList( $groups ),
1586                                 count( $groups) );
1587                 } else {
1588                         $this->addWikiMsg( 'badaccess-group0' );
1589                 }
1590                 $this->returnToMain();
1591         }
1592
1593         /**
1594          * Use permissionRequired.
1595          * @deprecated
1596          */
1597         public function sysopRequired() {
1598                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1599         }
1600
1601         /**
1602          * Use permissionRequired.
1603          * @deprecated
1604          */
1605         public function developerRequired() {
1606                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1607         }
1608
1609         /**
1610          * Produce the stock "please login to use the wiki" page
1611          */
1612         public function loginToUse() {
1613                 global $wgUser, $wgContLang;
1614
1615                 if( $wgUser->isLoggedIn() ) {
1616                         $this->permissionRequired( 'read' );
1617                         return;
1618                 }
1619
1620                 $skin = $wgUser->getSkin();
1621
1622                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1623                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1624                 $this->setRobotPolicy( 'noindex,nofollow' );
1625                 $this->setArticleFlag( false );
1626
1627                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1628                 $loginLink = $skin->link(
1629                         $loginTitle,
1630                         wfMsgHtml( 'loginreqlink' ),
1631                         array(),
1632                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1633                         array( 'known', 'noclasses' )
1634                 );
1635                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1636                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1637
1638                 # Don't return to the main page if the user can't read it
1639                 # otherwise we'll end up in a pointless loop
1640                 $mainPage = Title::newMainPage();
1641                 if( $mainPage->userCanRead() )
1642                         $this->returnToMain( null, $mainPage );
1643         }
1644
1645         /** @deprecated */
1646         public function databaseError( $fname, $sql, $error, $errno ) {
1647                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1648         }
1649
1650         /**
1651          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1652          * @return string The wikitext error-messages, formatted into a list.
1653          */
1654         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1655                 if ($action == null) {
1656                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1657                 } else {
1658                         global $wgLang;
1659                         $action_desc = wfMsgNoTrans( "action-$action" );
1660                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1661                 }
1662
1663                 if (count( $errors ) > 1) {
1664                         $text .= '<ul class="permissions-errors">' . "\n";
1665
1666                         foreach( $errors as $error )
1667                         {
1668                                 $text .= '<li>';
1669                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1670                                 $text .= "</li>\n";
1671                         }
1672                         $text .= '</ul>';
1673                 } else {
1674                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1675                 }
1676
1677                 return $text;
1678         }
1679
1680         /**
1681          * Display a page stating that the Wiki is in read-only mode,
1682          * and optionally show the source of the page that the user
1683          * was trying to edit.  Should only be called (for this
1684          * purpose) after wfReadOnly() has returned true.
1685          *
1686          * For historical reasons, this function is _also_ used to
1687          * show the error message when a user tries to edit a page
1688          * they are not allowed to edit.  (Unless it's because they're
1689          * blocked, then we show blockedPage() instead.)  In this
1690          * case, the second parameter should be set to true and a list
1691          * of reasons supplied as the third parameter.
1692          *
1693          * @todo Needs to be split into multiple functions.
1694          *
1695          * @param string $source    Source code to show (or null).
1696          * @param bool   $protected Is this a permissions error?
1697          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1698          */
1699         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1700                 global $wgUser;
1701                 $skin = $wgUser->getSkin();
1702
1703                 $this->setRobotPolicy( 'noindex,nofollow' );
1704                 $this->setArticleRelated( false );
1705
1706                 // If no reason is given, just supply a default "I can't let you do
1707                 // that, Dave" message.  Should only occur if called by legacy code.
1708                 if ( $protected && empty($reasons) ) {
1709                         $reasons[] = array( 'badaccess-group0' );
1710                 }
1711
1712                 if ( !empty($reasons) ) {
1713                         // Permissions error
1714                         if( $source ) {
1715                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1716                                 $this->setSubtitle(
1717                                         wfMsg(
1718                                                 'viewsourcefor',
1719                                                 $skin->link(
1720                                                         $this->getTitle(),
1721                                                         null,
1722                                                         array(),
1723                                                         array(),
1724                                                         array( 'known', 'noclasses' )
1725                                                 )
1726                                         )
1727                                 );
1728                         } else {
1729                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1730                         }
1731                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1732                 } else {
1733                         // Wiki is read only
1734                         $this->setPageTitle( wfMsg( 'readonly' ) );
1735                         $reason = wfReadOnlyReason();
1736                         $this->wrapWikiMsg( '<div class="mw-readonly-error">\n$1</div>', array( 'readonlytext', $reason ) );
1737                 }
1738
1739                 // Show source, if supplied
1740                 if( is_string( $source ) ) {
1741                         $this->addWikiMsg( 'viewsourcetext' );
1742
1743                         $params = array(
1744                                 'id'   => 'wpTextbox1',
1745                                 'name' => 'wpTextbox1',
1746                                 'cols' => $wgUser->getOption( 'cols' ),
1747                                 'rows' => $wgUser->getOption( 'rows' ),
1748                                 'readonly' => 'readonly'
1749                         );
1750                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1751
1752                         // Show templates used by this article
1753                         $skin = $wgUser->getSkin();
1754                         $article = new Article( $this->getTitle() );
1755                         $this->addHTML( "<div class='templatesUsed'>
1756 {$skin->formatTemplates( $article->getUsedTemplates() )}
1757 </div>
1758 " );
1759                 }
1760
1761                 # If the title doesn't exist, it's fairly pointless to print a return
1762                 # link to it.  After all, you just tried editing it and couldn't, so
1763                 # what's there to do there?
1764                 if( $this->getTitle()->exists() ) {
1765                         $this->returnToMain( null, $this->getTitle() );
1766                 }
1767         }
1768
1769         /** @deprecated */
1770         public function fatalError( $message ) {
1771                 wfDeprecated( __METHOD__ );
1772                 throw new FatalError( $message );
1773         }
1774
1775         /** @deprecated */
1776         public function unexpectedValueError( $name, $val ) {
1777                 wfDeprecated( __METHOD__ );
1778                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1779         }
1780
1781         /** @deprecated */
1782         public function fileCopyError( $old, $new ) {
1783                 wfDeprecated( __METHOD__ );
1784                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1785         }
1786
1787         /** @deprecated */
1788         public function fileRenameError( $old, $new ) {
1789                 wfDeprecated( __METHOD__ );
1790                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1791         }
1792
1793         /** @deprecated */
1794         public function fileDeleteError( $name ) {
1795                 wfDeprecated( __METHOD__ );
1796                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1797         }
1798
1799         /** @deprecated */
1800         public function fileNotFoundError( $name ) {
1801                 wfDeprecated( __METHOD__ );
1802                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1803         }
1804
1805         public function showFatalError( $message ) {
1806                 $this->setPageTitle( wfMsg( "internalerror" ) );
1807                 $this->setRobotPolicy( "noindex,nofollow" );
1808                 $this->setArticleRelated( false );
1809                 $this->enableClientCache( false );
1810                 $this->mRedirect = '';
1811                 $this->mBodytext = $message;
1812         }
1813
1814         public function showUnexpectedValueError( $name, $val ) {
1815                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1816         }
1817
1818         public function showFileCopyError( $old, $new ) {
1819                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1820         }
1821
1822         public function showFileRenameError( $old, $new ) {
1823                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1824         }
1825
1826         public function showFileDeleteError( $name ) {
1827                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1828         }
1829
1830         public function showFileNotFoundError( $name ) {
1831                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1832         }
1833
1834         /**
1835          * Add a "return to" link pointing to a specified title
1836          *
1837          * @param $title Title to link
1838          * @param $query String: query string
1839          */
1840         public function addReturnTo( $title, $query = array() ) {
1841                 global $wgUser;
1842                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1843                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1844                         $title, null, array(), $query ) );
1845                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1846         }
1847
1848         /**
1849          * Add a "return to" link pointing to a specified title,
1850          * or the title indicated in the request, or else the main page
1851          *
1852          * @param $unused No longer used
1853          * @param $returnto Title or String to return to
1854          * @param $returntoquery String: query string for the return to link
1855          */
1856         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1857                 global $wgRequest;
1858
1859                 if ( $returnto == null ) {
1860                         $returnto = $wgRequest->getText( 'returnto' );
1861                 }
1862
1863                 if ( $returntoquery == null ) {
1864                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1865                 }
1866
1867                 if ( $returnto === '' ) {
1868                         $returnto = Title::newMainPage();
1869                 }
1870
1871                 if ( is_object( $returnto ) ) {
1872                         $titleObj = $returnto;
1873                 } else {
1874                         $titleObj = Title::newFromText( $returnto );
1875                 }
1876                 if ( !is_object( $titleObj ) ) {
1877                         $titleObj = Title::newMainPage();
1878                 }
1879
1880                 $this->addReturnTo( $titleObj, $returntoquery );
1881         }
1882
1883         /**
1884          * @return string The doctype, opening <html>, and head element.
1885          *
1886          * @param $sk Skin The given Skin
1887          */
1888         public function headElement( Skin $sk, $includeStyle = true ) {
1889                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1890                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces, $wgHtml5Version;
1891                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgHtml5, $wgWellFormedXml;
1892                 global $wgUser, $wgRequest, $wgLang;
1893
1894                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1895                 if ( $sk->commonPrintStylesheet() ) {
1896                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1897                 }
1898                 $sk->setupUserCss( $this );
1899
1900                 $ret = '';
1901
1902                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1903                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1904                 }
1905
1906                 if ( $this->getHTMLTitle() == '' ) {
1907                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1908                 }
1909
1910                 $dir = $wgContLang->getDir();
1911
1912                 if ( $wgHtml5 ) {
1913                         if ( $wgWellFormedXml ) {
1914                                 # Unknown elements and attributes are okay in XML, but unknown
1915                                 # named entities are well-formedness errors and will break XML
1916                                 # parsers.  Thus we need a doctype that gives us appropriate
1917                                 # entity definitions.  The HTML5 spec permits four legacy
1918                                 # doctypes as obsolete but conforming, so let's pick one of
1919                                 # those, although it makes our pages look like XHTML1 Strict.
1920                                 # Isn't compatibility great?
1921                                 $ret .= "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n";
1922                         } else {
1923                                 # Much saner.
1924                                 $ret .= "<!doctype html>\n";
1925                         }
1926                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\" ";
1927                         if ( $wgHtml5Version ) $ret .= " version=\"$wgHtml5Version\" ";
1928                         $ret .= ">\n";
1929                 } else {
1930                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1931                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1932                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1933                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1934                         }
1935                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1936                 }
1937
1938                 $ret .= "<head>\n";
1939                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1940                 $ret .= implode( "\n", array(
1941                         $this->getHeadLinks(),
1942                         $this->buildCssLinks(),
1943                         $this->getHeadScripts( $sk ),
1944                         $this->getHeadItems(),
1945                 ));
1946                 if( $sk->usercss ){
1947                         $ret .= Html::inlineStyle( $sk->usercss );
1948                 }
1949
1950                 if ($wgUseTrackbacks && $this->isArticleRelated())
1951                         $ret .= $this->getTitle()->trackbackRDF();
1952
1953                 $ret .= "</head>\n";
1954
1955                 $bodyAttrs = array();
1956
1957                 # Crazy edit-on-double-click stuff
1958                 $action = $wgRequest->getVal( 'action', 'view' );
1959
1960                 if ( $this->getTitle()->getNamespace() != NS_SPECIAL
1961                 && !in_array( $action, array( 'edit', 'submit' ) )
1962                 && $wgUser->getOption( 'editondblclick' ) ) {
1963                         $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
1964                 }
1965
1966                 # Class bloat
1967                 $bodyAttrs['class'] = "mediawiki $dir";
1968
1969                 if ( $wgLang->capitalizeAllNouns() ) {
1970                         # A <body> class is probably not the best way to do this . . .
1971                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
1972                 }
1973                 $bodyAttrs['class'] .= ' ns-' . $this->getTitle()->getNamespace();
1974                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
1975                         $bodyAttrs['class'] .= ' ns-special';
1976                 } elseif ( $this->getTitle()->isTalkPage() ) {
1977                         $bodyAttrs['class'] .= ' ns-talk';
1978                 } else {
1979                         $bodyAttrs['class'] .= ' ns-subject';
1980                 }
1981                 $bodyAttrs['class'] .= ' ' . Sanitizer::escapeClass( 'page-' . $this->getTitle()->getPrefixedText() );
1982                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $wgUser->getSkin()->getSkinName() );
1983
1984                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
1985
1986                 return $ret;
1987         }
1988
1989         /*
1990          * gets the global variables and mScripts
1991          *
1992          * also adds userjs to the end if enabled:
1993         */
1994         function getHeadScripts( Skin $sk ) {
1995                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1996                 global $wgStylePath, $wgStyleVersion;
1997
1998                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1999                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
2000
2001                 //add site JS if enabled:
2002                 if( $wgUseSiteJs ) {
2003                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
2004                         $this->addScriptFile(  Skin::makeUrl( '-',
2005                                         "action=raw$jsCache&gen=js&useskin=" .
2006                                         urlencode( $sk->getSkinName() )
2007                                         )
2008                                 );
2009                 }
2010
2011                 //add user js if enabled:
2012                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
2013                         $action = $wgRequest->getVal( 'action', 'view' );
2014                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
2015                                 # XXX: additional security check/prompt?
2016                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
2017                         } else {
2018                                 $userpage = $wgUser->getUserPage();
2019                                 $scriptpage = Title::makeTitleSafe(
2020                                         NS_USER,
2021                                         $userpage->getDBkey() . '/' . $sk->getSkinName() . '.js'
2022                                 );
2023                                 if ( $scriptpage && $scriptpage->exists() ) {
2024                                         $userjs = Skin::makeUrl( $scriptpage->getPrefixedText(), 'action=raw&ctype=' . $wgJsMimeType );
2025                                         $this->addScriptFile( $userjs );
2026                                 }
2027                         }
2028                 }
2029
2030                 $scripts .= "\n" . $this->mScripts;
2031                 return $scripts;
2032         }
2033
2034         protected function addDefaultMeta() {
2035                 global $wgVersion, $wgHtml5;
2036
2037                 static $called = false;
2038                 if ( $called ) {
2039                         # Don't run this twice
2040                         return;
2041                 }
2042                 $called = true;
2043
2044                 if ( !$wgHtml5 ) {
2045                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
2046                 }
2047                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
2048
2049                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
2050                 if( $p !== 'index,follow' ) {
2051                         // http://www.robotstxt.org/wc/meta-user.html
2052                         // Only show if it's different from the default robots policy
2053                         $this->addMeta( 'robots', $p );
2054                 }
2055
2056                 if ( count( $this->mKeywords ) > 0 ) {
2057                         $strip = array(
2058                                 "/<.*?" . ">/" => '',
2059                                 "/_/" => ' '
2060                         );
2061                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
2062                 }
2063         }
2064
2065         /**
2066          * @return string HTML tag links to be put in the header.
2067          */
2068         public function getHeadLinks() {
2069                 global $wgRequest, $wgFeed;
2070
2071                 // Ideally this should happen earlier, somewhere. :P
2072                 $this->addDefaultMeta();
2073
2074                 $tags = array();
2075
2076                 foreach ( $this->mMetatags as $tag ) {
2077                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
2078                                 $a = 'http-equiv';
2079                                 $tag[0] = substr( $tag[0], 5 );
2080                         } else {
2081                                 $a = 'name';
2082                         }
2083                         $tags[] = Html::element( 'meta',
2084                                 array(
2085                                         $a => $tag[0],
2086                                         'content' => $tag[1] ) );
2087                 }
2088                 foreach ( $this->mLinktags as $tag ) {
2089                         $tags[] = Html::element( 'link', $tag );
2090                 }
2091
2092                 if( $wgFeed ) {
2093                         foreach( $this->getSyndicationLinks() as $format => $link ) {
2094                                 # Use the page name for the title (accessed through $wgTitle since
2095                                 # there's no other way).  In principle, this could lead to issues
2096                                 # with having the same name for different feeds corresponding to
2097                                 # the same page, but we can't avoid that at this low a level.
2098
2099                                 $tags[] = $this->feedLink(
2100                                         $format,
2101                                         $link,
2102                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
2103                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) );
2104                         }
2105
2106                         # Recent changes feed should appear on every page (except recentchanges,
2107                         # that would be redundant). Put it after the per-page feed to avoid
2108                         # changing existing behavior. It's still available, probably via a
2109                         # menu in your browser. Some sites might have a different feed they'd
2110                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
2111                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
2112                         # If so, use it instead.
2113
2114                         global $wgOverrideSiteFeed, $wgSitename, $wgAdvertisedFeedTypes;
2115                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
2116
2117                         if ( $wgOverrideSiteFeed ) {
2118                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
2119                                         $tags[] = $this->feedLink (
2120                                                 $type,
2121                                                 htmlspecialchars( $feedUrl ),
2122                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
2123                                 }
2124                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
2125                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
2126                                         $tags[] = $this->feedLink(
2127                                                 $format,
2128                                                 $rctitle->getLocalURL( "feed={$format}" ),
2129                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
2130                                 }
2131                         }
2132                 }
2133
2134                 return implode( "\n", $tags );
2135         }
2136
2137         /**
2138          * Return URLs for each supported syndication format for this page.
2139          * @return array associating format keys with URLs
2140          */
2141         public function getSyndicationLinks() {
2142                 return $this->mFeedLinks;
2143         }
2144
2145         /**
2146          * Generate a <link rel/> for an RSS feed.
2147          */
2148         private function feedLink( $type, $url, $text ) {
2149                 return Html::element( 'link', array(
2150                         'rel' => 'alternate',
2151                         'type' => "application/$type+xml",
2152                         'title' => $text,
2153                         'href' => $url ) );
2154         }
2155
2156         /**
2157          * Add a local or specified stylesheet, with the given media options.
2158          * Meant primarily for internal use...
2159          *
2160          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
2161          * @param $conditional -- for IE conditional comments, specifying an IE version
2162          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
2163          */
2164         public function addStyle( $style, $media='', $condition='', $dir='' ) {
2165                 $options = array();
2166                 // Even though we expect the media type to be lowercase, but here we
2167                 // force it to lowercase to be safe.
2168                 if( $media )
2169                         $options['media'] = $media;
2170                 if( $condition )
2171                         $options['condition'] = $condition;
2172                 if( $dir )
2173                         $options['dir'] = $dir;
2174                 $this->styles[$style] = $options;
2175         }
2176
2177         /**
2178          * Adds inline CSS styles
2179          * @param $style_css Mixed: inline CSS
2180          */
2181         public function addInlineStyle( $style_css ){
2182                 $this->mScripts .= Html::inlineStyle( $style_css );
2183         }
2184
2185         /**
2186          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
2187          * These will be applied to various media & IE conditionals.
2188          */
2189         public function buildCssLinks() {
2190                 $links = array();
2191                 foreach( $this->styles as $file => $options ) {
2192                         $link = $this->styleLink( $file, $options );
2193                         if( $link )
2194                                 $links[] = $link;
2195                 }
2196
2197                 return implode( "\n", $links );
2198         }
2199
2200         protected function styleLink( $style, $options ) {
2201                 global $wgRequest;
2202
2203                 if( isset( $options['dir'] ) ) {
2204                         global $wgContLang;
2205                         $siteDir = $wgContLang->getDir();
2206                         if( $siteDir != $options['dir'] )
2207                                 return '';
2208                 }
2209
2210                 if( isset( $options['media'] ) ) {
2211                         $media = $this->transformCssMedia( $options['media'] );
2212                         if( is_null( $media ) ) {
2213                                 return '';
2214                         }
2215                 } else {
2216                         $media = 'all';
2217                 }
2218
2219                 if( substr( $style, 0, 1 ) == '/' ||
2220                         substr( $style, 0, 5 ) == 'http:' ||
2221                         substr( $style, 0, 6 ) == 'https:' ) {
2222                         $url = $style;
2223                 } else {
2224                         global $wgStylePath, $wgStyleVersion;
2225                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
2226                 }
2227
2228                 $link = Html::linkedStyle( $url, $media );
2229
2230                 if( isset( $options['condition'] ) ) {
2231                         $condition = htmlspecialchars( $options['condition'] );
2232                         $link = "<!--[if $condition]>$link<![endif]-->";
2233                 }
2234                 return $link;
2235         }
2236
2237         function transformCssMedia( $media ) {
2238                 global $wgRequest, $wgHandheldForIPhone;
2239
2240                 // Switch in on-screen display for media testing
2241                 $switches = array(
2242                         'printable' => 'print',
2243                         'handheld' => 'handheld',
2244                 );
2245                 foreach( $switches as $switch => $targetMedia ) {
2246                         if( $wgRequest->getBool( $switch ) ) {
2247                                 if( $media == $targetMedia ) {
2248                                         $media = '';
2249                                 } elseif( $media == 'screen' ) {
2250                                         return null;
2251                                 }
2252                         }
2253                 }
2254
2255                 // Expand longer media queries as iPhone doesn't grok 'handheld'
2256                 if( $wgHandheldForIPhone ) {
2257                         $mediaAliases = array(
2258                                 'screen' => 'screen and (min-device-width: 481px)',
2259                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
2260                         );
2261
2262                         if( isset( $mediaAliases[$media] ) ) {
2263                                 $media = $mediaAliases[$media];
2264                         }
2265                 }
2266
2267                 return $media;
2268         }
2269
2270         /**
2271          * Turn off regular page output and return an error reponse
2272          * for when rate limiting has triggered.
2273          */
2274         public function rateLimited() {
2275
2276                 $this->setPageTitle(wfMsg('actionthrottled'));
2277                 $this->setRobotPolicy( 'noindex,follow' );
2278                 $this->setArticleRelated( false );
2279                 $this->enableClientCache( false );
2280                 $this->mRedirect = '';
2281                 $this->clearHTML();
2282                 $this->setStatusCode(503);
2283                 $this->addWikiMsg( 'actionthrottledtext' );
2284
2285                 $this->returnToMain( null, $this->getTitle() );
2286         }
2287
2288         /**
2289          * Show an "add new section" link?
2290          *
2291          * @return bool
2292          */
2293         public function showNewSectionLink() {
2294                 return $this->mNewSectionLink;
2295         }
2296
2297         /**
2298         * Forcibly hide the new section link?
2299         *
2300         * @return bool
2301         */
2302         public function forceHideNewSectionLink() {
2303                 return $this->mHideNewSectionLink;
2304         }
2305
2306         /**
2307          * Show a warning about slave lag
2308          *
2309          * If the lag is higher than $wgSlaveLagCritical seconds,
2310          * then the warning is a bit more obvious. If the lag is
2311          * lower than $wgSlaveLagWarning, then no warning is shown.
2312          *
2313          * @param int $lag Slave lag
2314          */
2315         public function showLagWarning( $lag ) {
2316                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
2317                 if( $lag >= $wgSlaveLagWarning ) {
2318                         $message = $lag < $wgSlaveLagCritical
2319                                 ? 'lag-warn-normal'
2320                                 : 'lag-warn-high';
2321                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2322                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2323                 }
2324         }
2325
2326         /**
2327          * Add a wikitext-formatted message to the output.
2328          * This is equivalent to:
2329          *
2330          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2331          */
2332         public function addWikiMsg( /*...*/ ) {
2333                 $args = func_get_args();
2334                 $name = array_shift( $args );
2335                 $this->addWikiMsgArray( $name, $args );
2336         }
2337
2338         /**
2339          * Add a wikitext-formatted message to the output.
2340          * Like addWikiMsg() except the parameters are taken as an array
2341          * instead of a variable argument list.
2342          *
2343          * $options is passed through to wfMsgExt(), see that function for details.
2344          */
2345         public function addWikiMsgArray( $name, $args, $options = array() ) {
2346                 $options[] = 'parse';
2347                 $text = wfMsgExt( $name, $options, $args );
2348                 $this->addHTML( $text );
2349         }
2350
2351         /**
2352          * This function takes a number of message/argument specifications, wraps them in
2353          * some overall structure, and then parses the result and adds it to the output.
2354          *
2355          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2356          * on. The subsequent arguments may either be strings, in which case they are the
2357          * message names, or arrays, in which case the first element is the message name,
2358          * and subsequent elements are the parameters to that message.
2359          *
2360          * The special named parameter 'options' in a message specification array is passed
2361          * through to the $options parameter of wfMsgExt().
2362          *
2363          * Don't use this for messages that are not in users interface language.
2364          *
2365          * For example:
2366          *
2367          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>", 'some-error' );
2368          *
2369          * Is equivalent to:
2370          *
2371          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . '</div>' );
2372          *
2373          * The newline after opening div is needed in some wikitext. See bug 19226.
2374          */
2375         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2376                 $msgSpecs = func_get_args();
2377                 array_shift( $msgSpecs );
2378                 $msgSpecs = array_values( $msgSpecs );
2379                 $s = $wrap;
2380                 foreach ( $msgSpecs as $n => $spec ) {
2381                         $options = array();
2382                         if ( is_array( $spec ) ) {
2383                                 $args = $spec;
2384                                 $name = array_shift( $args );
2385                                 if ( isset( $args['options'] ) ) {
2386                                         $options = $args['options'];
2387                                         unset( $args['options'] );
2388                                 }
2389                         }  else {
2390                                 $args = array();
2391                                 $name = $spec;
2392                         }
2393                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2394                 }
2395                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2396         }
2397
2398         /**
2399          * Include jQuery core. Use this to avoid loading it multiple times
2400          * before we get a usable script loader.
2401          *
2402          * @param array $modules List of jQuery modules which should be loaded
2403          *
2404          * Returns the list of modules which were not loaded.
2405          */
2406         public function includeJQuery( $modules = array() ) {
2407                 global $wgScriptPath, $wgStyleVersion, $wgJsMimeType;
2408
2409                 $supportedModules = array( /** TODO: add things here */ );
2410                 $unsupported = array_diff( $modules, $supportedModules );
2411
2412                 $params = array(
2413                         'type' => $wgJsMimeType,
2414                         'src' => "$wgScriptPath/skins/common/jquery.min.js?$wgStyleVersion",
2415                 );
2416                 if ( !$this->mJQueryDone ) {
2417                         $this->mJQueryDone = true;
2418                         $this->mScripts = Html::element( 'script', $params ) . "\n" . $this->mScripts;
2419                 }
2420                 return $unsupported;
2421         }
2422
2423 }