includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mLanguageLinks = array();
  16
  17         var $mScriptLoaderClassList = array();
  18         // the most recent id of any script that is grouped in the script request
  19         var $mLatestScriptRevID = 0;
  20
  21         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  22         var $mTemplateIds = array();
  23
  24         var $mAllowUserJs;
  25         var $mSuppressQuickbar = false;
  26         var $mOnloadHandler = '';
  27         var $mDoNothing = false;
  28         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  29         var $mIsArticleRelated = true;
  30         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  31         var $mShowFeedLinks = false;
  32         var $mFeedLinksAppendQuery = false;
  33         var $mEnableClientCache = true;
  34         var $mArticleBodyOnly = false;
  35
  36         var $mNewSectionLink = false;
  37         var $mHideNewSectionLink = false;
  38         var $mNoGallery = false;
  39         var $mPageTitleActionText = '';
  40         var $mParseWarnings = array();
  41         var $mSquidMaxage = 0;
  42         var $mRevisionId = null;
  43         protected $mTitle = null;
  44
  45         /**
  46          * An array of stylesheet filenames (relative from skins path), with options
  47          * for CSS media, IE conditions, and RTL/LTR direction.
  48          * For internal use; add settings in the skin via $this->addStyle()
  49          */
  50         var $styles = array();
  51
  52         private $mIndexPolicy = 'index';
  53         private $mFollowPolicy = 'follow';
  54
  55         /**
  56          * Constructor
  57          * Initialise private variables
  58          */
  59         function __construct() {
  60                 global $wgAllowUserJs;
  61                 $this->mAllowUserJs = $wgAllowUserJs;
  62         }
  63
  64         public function redirect( $url, $responsecode = '302' ) {
  65                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  66                 $this->mRedirect = str_replace( "\n", '', $url );
  67                 $this->mRedirectCode = $responsecode;
  68         }
  69
  70         public function getRedirect() {
  71                 return $this->mRedirect;
  72         }
  73
  74         /**
  75          * Set the HTTP status code to send with the output.
  76          *
  77          * @param int $statusCode
  78          * @return nothing
  79          */
  80         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  81
  82         /**
  83          * Add a new <meta> tag
  84          * To add an http-equiv meta tag, precede the name with "http:"
  85          *
  86          * @param $name tag name
  87          * @param $val tag value
  88          */
  89         function addMeta( $name, $val ) {
  90                 array_push( $this->mMetatags, array( $name, $val ) );
  91         }
  92
  93         function addKeyword( $text ) {
  94                 if( is_array( $text )) {
  95                         $this->mKeywords = array_merge( $this->mKeywords, $text );
  96                 } else {
  97                         array_push( $this->mKeywords, $text );
  98                 }
  99         }
 100         function addScript( $script ) { $this->mScripts .= "\t\t" . $script . "\n"; }
 101
 102         /**
 103          * Register and add a stylesheet from an extension directory.
 104          * @param $url String path to sheet.  Provide either a full url (beginning
 105          *             with 'http', etc) or a relative path from the document root
 106          *             (beginning with '/').  Otherwise it behaves identically to
 107          *             addStyle() and draws from the /skins folder.
 108          */
 109         public function addExtensionStyle( $url ) {
 110                 $linkarr = array( 'rel' => 'stylesheet', 'href' => $url, 'type' => 'text/css' );
 111                 array_push( $this->mExtStyles, $linkarr );
 112         }
 113
 114         /**
 115          * Add a JavaScript file out of skins/common, or a given relative path.
 116          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 117          */
 118         function addScriptFile( $file ) {
 119                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType, $wgScript, $wgUser;
 120                 global $wgJSAutoloadClasses, $wgJSAutoloadLocalClasses, $wgEnableScriptLoader, $wgScriptPath;
 121
 122                 if( substr( $file, 0, 1 ) == '/' ) {
 123                         $path = $file;
 124                 } else {
 125                         $path = "{$wgStylePath}/common/{$file}";
 126                 }
 127
 128                 if( $wgEnableScriptLoader ){
 129                         if( strpos( $path, $wgScript ) !== false ){
 130                                 $reqPath = str_replace( $wgScript . '?', '', $path );
 131                                 $reqArgs = explode( '&', $reqPath );
 132                                 $reqSet = array();
 133
 134                                 foreach( $reqArgs as $arg ){
 135                                         list( $key, $var ) = explode( '=', $arg );
 136                                         $reqSet[$key] = $var;
 137                                 }
 138
 139                                 if( isset( $reqSet['title'] ) && $reqSet != '' ) {
 140                                         // extract any extra param (for now just skin)
 141                                         $ext_param = ( isset( $reqSet['useskin'] ) && $reqSet['useskin'] != '' ) ? '|useskin=' . ucfirst( $reqSet['useskin'] ) : '';
 142                                         $this->mScriptLoaderClassList[] = 'WT:' . $reqSet['title'] . $ext_param ;
 143                                         // add the title revision to the key
 144                                         $t = Title::newFromText( $reqSet['title'] );
 145                                         // if there is no title (don't worry we just use the $wgStyleVersion var (which should be updated on relevant commits)
 146                                         if( $t && $t->exists() ){
 147                                                 if( $t->getLatestRevID() > $this->mLatestScriptRevID  )
 148                                                         $this->mLatestScriptRevID = $t->getLatestRevID();
 149                                         }
 150                                         return true;
 151                                 }
 152                         }
 153
 154                         // check for class from path:
 155                         $js_class = $this->getJsClassFromPath( $path );
 156                         if( $js_class ){
 157                                 // add to the class list:
 158                                 $this->mScriptLoaderClassList[] = $js_class;
 159                                 return true;
 160                         }
 161                 }
 162
 163                 // if the script loader did not find a way to add the script than add using addScript
 164                 $this->addScript(
 165                         Xml::element( 'script',
 166                                 array(
 167                                         'type' => $wgJsMimeType,
 168                                         'src' => wfAppendQuery( $path, $this->getURIDparam() ),
 169                                 ),
 170                                 '', false
 171                         )
 172                 );
 173         }
 174
 175         /**
 176          * This is the core script that is included on every page
 177          * (they are requested separately to improve caching across
 178          *  different page load types (edit, upload, view, etc)
 179          */
 180         function addCoreScripts2Top(){
 181                 global $wgEnableScriptLoader, $wgStyleVersion, $wgJSAutoloadLocalClasses, $wgJsMimeType, $wgScriptPath, $wgEnableJS2system;
 182                 //@@todo we should deprecate wikibits in favor of mv_embed and native jQuery functions
 183
 184                 if( $wgEnableJS2system ){
 185                         $core_classes = array( 'window.jQuery', 'mv_embed', 'wikibits' );
 186                 } else {
 187                         $core_classes = array( 'wikibits' );
 188                 }
 189
 190                 if( $wgEnableScriptLoader ){
 191                         $this->mScripts = $this->getScriptLoaderJs( $core_classes ) . $this->mScripts;
 192                 } else {
 193                         $so = '';
 194                         foreach( $core_classes as $s ){
 195                                 if( isset( $wgJSAutoloadLocalClasses[$s] ) ){
 196                                         $so.= Xml::element( 'script', array(
 197                                                         'type' => $wgJsMimeType,
 198                                                         'src' => "{$wgScriptPath}/{$wgJSAutoloadLocalClasses[$s]}?" . $this->getURIDparam()
 199                                                 ),
 200                                                 '', false
 201                                         );
 202                                 }
 203                         }
 204                         $this->mScripts =  $so . $this->mScripts;
 205                 }
 206         }
 207
 208         /**
 209          * @param $js_class String: name of JavaScript class
 210          * @return Boolean: false if class wasn't found, true on success
 211          */
 212         function addScriptClass( $js_class ){
 213                 global $wgJSAutoloadClasses, $wgJSAutoloadLocalClasses, $wgJsMimeType,
 214                                 $wgEnableScriptLoader, $wgStyleVersion, $wgScriptPath;
 215
 216                 if( isset( $wgJSAutoloadClasses[$js_class] ) || isset( $wgJSAutoloadLocalClasses[$js_class] ) ){
 217                         if( $wgEnableScriptLoader ){
 218                                 if( !in_array( $js_class, $this->mScriptLoaderClassList ) ){
 219                                         $this->mScriptLoaderClassList[] = $js_class;
 220                                 }
 221                         } else {
 222                                 // do a normal load of without the script-loader:
 223                                 $path = $wgScriptPath . '/';
 224                                 $path.= isset( $wgJSAutoloadClasses[$js_class] ) ? $wgJSAutoloadClasses[$js_class]:
 225                                                         $wgJSAutoloadLocalClasses[$js_class];
 226                                 $this->addScript(
 227                                         Xml::element( 'script',
 228                                                 array(
 229                                                         'type' => $wgJsMimeType,
 230                                                         'src' => "$path?$wgStyleVersion",
 231                                                 ),
 232                                                 '', false
 233                                         )
 234                                 );
 235                         }
 236                         return true;
 237                 }
 238                 wfDebug( __METHOD__ . ' could not find js_class: ' . $js_class );
 239                 return false; // could not find the class
 240         }
 241
 242         /**
 243          * gets the scriptLoader javascript include
 244          * @param $forcClassAry Boolean: false by default
 245          */
 246         function getScriptLoaderJs( $forceClassAry = false ){
 247                 global $wgScriptPath, $wgJsMimeType, $wgStyleVersion, $wgRequest, $wgDebugJavaScript;
 248
 249                 if( !$forceClassAry ){
 250                         $class_list = implode( ',', $this->mScriptLoaderClassList );
 251                 } else {
 252                         $class_list = implode( ',', $forceClassAry );
 253                 }
 254
 255                 $debug_param = ( $wgDebugJavaScript ||
 256                                                  $wgRequest->getVal( 'debug' ) == 'true' ||
 257                                                  $wgRequest->getVal( 'debug' ) == '1' )
 258                                          ? '&debug=true' : '';
 259
 260                 //@@todo intelligent unique id generation based on svn version of file (rather than just grabbing the $wgStyleVersion var)
 261                 //@@todo we should check the packaged message text in this javascript file for updates and update the $mScriptLoaderURID id (in getJsClassFromPath)
 262
 263                 //generate the unique request param (combine with the most recent revision id of any wiki page with the $wgStyleVersion var)
 264
 265
 266                 return Xml::element( 'script',
 267                                 array(
 268                                         'type' => $wgJsMimeType,
 269                                         'src' => "$wgScriptPath/mwScriptLoader.php?class={$class_list}{$debug_param}&".$this->getURIDparam(),
 270                                 ),
 271                                 '', false
 272                 );
 273         }
 274
 275         function getURIDparam(){
 276                 global $wgDebugJavaScript, $wgStyleVersion;
 277                 if( $wgDebugJavaScript ){
 278                         return 'urid=' . time();
 279                 } else {
 280                         return "urid={$wgStyleVersion}_{$this->mLatestScriptRevID}";
 281                 }
 282         }
 283
 284         function getJsClassFromPath( $path ){
 285                 global $wgJSAutoloadClasses, $wgJSAutoloadLocalClasses, $wgScriptPath;
 286
 287                 $scriptLoaderPaths = array_merge( $wgJSAutoloadClasses,  $wgJSAutoloadLocalClasses );
 288                 foreach( $scriptLoaderPaths as $js_class => $js_path ){
 289                         $js_path = "{$wgScriptPath}/{$js_path}";
 290                         if( $path == $js_path )
 291                                 return $js_class;
 292                 }
 293                 return false;
 294         }
 295
 296         /**
 297          * Add a self-contained script tag with the given contents
 298          * @param string $script JavaScript text, no <script> tags
 299          */
 300         function addInlineScript( $script ) {
 301                 global $wgJsMimeType;
 302                 $this->mScripts .= "\t\t<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n\t\t$script\n\t\t/*]]>*/</script>\n";
 303         }
 304
 305         function getScript() {
 306                 global $wgEnableScriptLoader;
 307                 if( $wgEnableScriptLoader ){
 308                         //include $this->mScripts (for anything that we could not package into the scriptloader
 309                         return $this->mScripts . "\n" . $this->getScriptLoaderJs() . $this->getHeadItems();
 310                 } else {
 311                         return $this->mScripts . $this->getHeadItems();
 312                 }
 313         }
 314
 315         function getHeadItems() {
 316                 $s = '';
 317                 foreach ( $this->mHeadItems as $item ) {
 318                         $s .= $item;
 319                 }
 320                 return $s;
 321         }
 322
 323         function addHeadItem( $name, $value ) {
 324                 $this->mHeadItems[$name] = $value;
 325         }
 326
 327         function hasHeadItem( $name ) {
 328                 return isset( $this->mHeadItems[$name] );
 329         }
 330
 331         function setETag($tag) { $this->mETag = $tag; }
 332         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 333         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 334
 335         function addLink( $linkarr ) {
 336                 # $linkarr should be an associative array of attributes. We'll escape on output.
 337                 array_push( $this->mLinktags, $linkarr );
 338         }
 339
 340         # Get all links added by extensions
 341         function getExtStyle() {
 342                 return $this->mExtStyles;
 343         }
 344
 345         function addMetadataLink( $linkarr ) {
 346                 # note: buggy CC software only reads first "meta" link
 347                 static $haveMeta = false;
 348                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 349                 $this->addLink( $linkarr );
 350                 $haveMeta = true;
 351         }
 352
 353         /**
 354          * checkLastModified tells the client to use the client-cached page if
 355          * possible. If sucessful, the OutputPage is disabled so that
 356          * any future call to OutputPage->output() have no effect.
 357          *
 358          * Side effect: sets mLastModified for Last-Modified header
 359          *
 360          * @return bool True iff cache-ok headers was sent.
 361          */
 362         function checkLastModified( $timestamp ) {
 363                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 364
 365                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 366                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 367                         return false;
 368                 }
 369                 if( !$wgCachePages ) {
 370                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 371                         return false;
 372                 }
 373                 if( $wgUser->getOption( 'nocache' ) ) {
 374                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 375                         return false;
 376                 }
 377
 378                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 379                 $modifiedTimes = array(
 380                         'page' => $timestamp,
 381                         'user' => $wgUser->getTouched(),
 382                         'epoch' => $wgCacheEpoch
 383                 );
 384                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 385
 386                 $maxModified = max( $modifiedTimes );
 387                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 388
 389                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 390                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 391                         return false;
 392                 }
 393
 394                 # Make debug info
 395                 $info = '';
 396                 foreach ( $modifiedTimes as $name => $value ) {
 397                         if ( $info !== '' ) {
 398                                 $info .= ', ';
 399                         }
 400                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 401                 }
 402
 403                 # IE sends sizes after the date like this:
 404                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 405                 # this breaks strtotime().
 406                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 407
 408                 wfSuppressWarnings(); // E_STRICT system time bitching
 409                 $clientHeaderTime = strtotime( $clientHeader );
 410                 wfRestoreWarnings();
 411                 if ( !$clientHeaderTime ) {
 412                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 413                         return false;
 414                 }
 415                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 416
 417                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 418                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 419                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 420                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 421                 if( $clientHeaderTime < $maxModified ) {
 422                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 423                         return false;
 424                 }
 425
 426                 # Not modified
 427                 # Give a 304 response code and disable body output
 428                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 429                 ini_set('zlib.output_compression', 0);
 430                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 431                 $this->sendCacheControl();
 432                 $this->disable();
 433
 434                 // Don't output a compressed blob when using ob_gzhandler;
 435                 // it's technically against HTTP spec and seems to confuse
 436                 // Firefox when the response gets split over two packets.
 437                 wfClearOutputBuffers();
 438
 439                 return true;
 440         }
 441
 442         function setPageTitleActionText( $text ) {
 443                 $this->mPageTitleActionText = $text;
 444         }
 445
 446         function getPageTitleActionText () {
 447                 if ( isset( $this->mPageTitleActionText ) ) {
 448                         return $this->mPageTitleActionText;
 449                 }
 450         }
 451
 452         /**
 453          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 454          *
 455          * @param $policy string The literal string to output as the contents of
 456          *   the meta tag.  Will be parsed according to the spec and output in
 457          *   standardized form.
 458          * @return null
 459          */
 460         public function setRobotPolicy( $policy ) {
 461                 $policy = explode( ',', $policy );
 462                 $policy = array_map( 'trim', $policy );
 463
 464                 # The default policy is follow, so if nothing is said explicitly, we
 465                 # do that.
 466                 if( in_array( 'nofollow', $policy ) ) {
 467                         $this->mFollowPolicy = 'nofollow';
 468                 } else {
 469                         $this->mFollowPolicy = 'follow';
 470                 }
 471
 472                 if( in_array( 'noindex', $policy ) ) {
 473                         $this->mIndexPolicy = 'noindex';
 474                 } else {
 475                         $this->mIndexPolicy = 'index';
 476                 }
 477         }
 478
 479         /**
 480          * Set the index policy for the page, but leave the follow policy un-
 481          * touched.
 482          *
 483          * @param $policy string Either 'index' or 'noindex'.
 484          * @return null
 485          */
 486         public function setIndexPolicy( $policy ) {
 487                 $policy = trim( $policy );
 488                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 489                         $this->mIndexPolicy = $policy;
 490                 }
 491         }
 492
 493         /**
 494          * Set the follow policy for the page, but leave the index policy un-
 495          * touched.
 496          *
 497          * @param $policy string Either 'follow' or 'nofollow'.
 498          * @return null
 499          */
 500         public function setFollowPolicy( $policy ) {
 501                 $policy = trim( $policy );
 502                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 503                         $this->mFollowPolicy = $policy;
 504                 }
 505         }
 506
 507         /**
 508          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 509          */
 510         public function setHTMLTitle( $name ) {
 511                 $this->mHTMLtitle = $name;
 512         }
 513
 514         /**
 515          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 516          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 517          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 518          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 519          */
 520         public function setPageTitle( $name ) {
 521                 global $wgContLang;
 522                 $name = $wgContLang->convert( $name, true );
 523                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 524                 # but leave "<i>foobar</i>" alone
 525                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 526                 $this->mPagetitle = $nameWithTags;
 527
 528                 $taction =  $this->getPageTitleActionText();
 529                 if( !empty( $taction ) ) {
 530                         $name .= ' - '.$taction;
 531                 }
 532
 533                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 534                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 535         }
 536
 537         public function setTitle( $t ) {
 538                 $this->mTitle = $t;
 539         }
 540
 541         public function getTitle() {
 542                 if ( $this->mTitle instanceof Title ) {
 543                         return $this->mTitle;
 544                 }
 545                 else {
 546                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 547                         global $wgTitle;
 548                         return $wgTitle;
 549                 }
 550         }
 551
 552         public function getHTMLTitle() { return $this->mHTMLtitle; }
 553         public function getPageTitle() { return $this->mPagetitle; }
 554         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 555         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 556         public function getSubtitle() { return $this->mSubtitle; }
 557         public function isArticle() { return $this->mIsarticle; }
 558         public function setPrintable() { $this->mPrintable = true; }
 559         public function isPrintable() { return $this->mPrintable; }
 560         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 561         public function isSyndicated() { return $this->mShowFeedLinks; }
 562         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 563         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 564         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 565         public function getOnloadHandler() { return $this->mOnloadHandler; }
 566         public function disable() { $this->mDoNothing = true; }
 567         public function isDisabled() { return $this->mDoNothing; }
 568
 569         public function setArticleRelated( $v ) {
 570                 $this->mIsArticleRelated = $v;
 571                 if ( !$v ) {
 572                         $this->mIsarticle = false;
 573                 }
 574         }
 575         public function setArticleFlag( $v ) {
 576                 $this->mIsarticle = $v;
 577                 if ( $v ) {
 578                         $this->mIsArticleRelated = $v;
 579                 }
 580         }
 581
 582         public function isArticleRelated() { return $this->mIsArticleRelated; }
 583
 584         public function getLanguageLinks() { return $this->mLanguageLinks; }
 585         public function addLanguageLinks($newLinkArray) {
 586                 $this->mLanguageLinks += $newLinkArray;
 587         }
 588         public function setLanguageLinks($newLinkArray) {
 589                 $this->mLanguageLinks = $newLinkArray;
 590         }
 591
 592         public function getCategoryLinks() {
 593                 return $this->mCategoryLinks;
 594         }
 595
 596         /**
 597          * Add an array of categories, with names in the keys
 598          */
 599         public function addCategoryLinks( $categories ) {
 600                 global $wgUser, $wgContLang;
 601
 602                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 603                         return;
 604                 }
 605
 606                 # Add the links to a LinkBatch
 607                 $arr = array( NS_CATEGORY => $categories );
 608                 $lb = new LinkBatch;
 609                 $lb->setArray( $arr );
 610
 611                 # Fetch existence plus the hiddencat property
 612                 $dbr = wfGetDB( DB_SLAVE );
 613                 $pageTable = $dbr->tableName( 'page' );
 614                 $where = $lb->constructSet( 'page', $dbr );
 615                 $propsTable = $dbr->tableName( 'page_props' );
 616                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 617                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 618                 $res = $dbr->query( $sql, __METHOD__ );
 619
 620                 # Add the results to the link cache
 621                 $lb->addResultToCache( LinkCache::singleton(), $res );
 622
 623                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 624                 $categories = array_combine( array_keys( $categories ),
 625                         array_fill( 0, count( $categories ), 'normal' ) );
 626
 627                 # Mark hidden categories
 628                 foreach ( $res as $row ) {
 629                         if ( isset( $row->pp_value ) ) {
 630                                 $categories[$row->page_title] = 'hidden';
 631                         }
 632                 }
 633
 634                 # Add the remaining categories to the skin
 635                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 636                         $sk = $wgUser->getSkin();
 637                         foreach ( $categories as $category => $type ) {
 638                                 $origcategory = $category;
 639                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 640                                 $wgContLang->findVariantLink( $category, $title, true );
 641                                 if ( $category != $origcategory )
 642                                         if ( array_key_exists( $category, $categories ) )
 643                                                 continue;
 644                                 $text = $wgContLang->convertHtml( $title->getText() );
 645                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 646                         }
 647                 }
 648         }
 649
 650         public function setCategoryLinks($categories) {
 651                 $this->mCategoryLinks = array();
 652                 $this->addCategoryLinks($categories);
 653         }
 654
 655         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 656         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 657
 658         public function disallowUserJs() { $this->mAllowUserJs = false; }
 659         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 660
 661         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 662         public function addHTML( $text ) { $this->mBodytext .= $text; }
 663         public function clearHTML() { $this->mBodytext = ''; }
 664         public function getHTML() { return $this->mBodytext; }
 665         public function debug( $text ) { $this->mDebugtext .= $text; }
 666
 667         /* @deprecated */
 668         public function setParserOptions( $options ) {
 669                 wfDeprecated( __METHOD__ );
 670                 return $this->parserOptions( $options );
 671         }
 672
 673         public function parserOptions( $options = null ) {
 674                 if ( !$this->mParserOptions ) {
 675                         $this->mParserOptions = new ParserOptions;
 676                 }
 677                 return wfSetVar( $this->mParserOptions, $options );
 678         }
 679
 680         /**
 681          * Set the revision ID which will be seen by the wiki text parser
 682          * for things such as embedded {{REVISIONID}} variable use.
 683          * @param mixed $revid an integer, or NULL
 684          * @return mixed previous value
 685          */
 686         public function setRevisionId( $revid ) {
 687                 $val = is_null( $revid ) ? null : intval( $revid );
 688                 return wfSetVar( $this->mRevisionId, $val );
 689         }
 690
 691         public function getRevisionId() {
 692                 return $this->mRevisionId;
 693         }
 694
 695         /**
 696          * Convert wikitext to HTML and add it to the buffer
 697          * Default assumes that the current page title will
 698          * be used.
 699          *
 700          * @param string $text
 701          * @param bool   $linestart
 702          */
 703         public function addWikiText( $text, $linestart = true ) {
 704                 $title = $this->getTitle(); // Work arround E_STRICT
 705                 $this->addWikiTextTitle( $text, $title, $linestart );
 706         }
 707
 708         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 709                 $this->addWikiTextTitle($text, $title, $linestart);
 710         }
 711
 712         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 713                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 714         }
 715
 716         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 717                 global $wgParser;
 718
 719                 wfProfileIn( __METHOD__ );
 720
 721                 wfIncrStats( 'pcache_not_possible' );
 722
 723                 $popts = $this->parserOptions();
 724                 $oldTidy = $popts->setTidy( $tidy );
 725
 726                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 727                         $linestart, true, $this->mRevisionId );
 728
 729                 $popts->setTidy( $oldTidy );
 730
 731                 $this->addParserOutput( $parserOutput );
 732
 733                 wfProfileOut( __METHOD__ );
 734         }
 735
 736         /**
 737          * @todo document
 738          * @param ParserOutput object &$parserOutput
 739          */
 740         public function addParserOutputNoText( &$parserOutput ) {
 741                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 742
 743                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 744                 $this->addCategoryLinks( $parserOutput->getCategories() );
 745                 $this->mNewSectionLink = $parserOutput->getNewSection();
 746                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 747
 748                 if( is_null( $wgExemptFromUserRobotsControl ) ) {
 749                         $bannedNamespaces = $wgContentNamespaces;
 750                 } else {
 751                         $bannedNamespaces = $wgExemptFromUserRobotsControl;
 752                 }
 753                 if( !in_array( $this->getTitle()->getNamespace(), $bannedNamespaces ) ) {
 754                         # FIXME (bug 14900): This overrides $wgArticleRobotPolicies, and it
 755                         # shouldn't
 756                         $this->setIndexPolicy( $parserOutput->getIndexPolicy() );
 757                 }
 758
 759                 $this->mParseWarnings = $parserOutput->getWarnings();
 760                 if ( $parserOutput->getCacheTime() == -1 ) {
 761                         $this->enableClientCache( false );
 762                 }
 763                 $this->mNoGallery = $parserOutput->getNoGallery();
 764                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 765                 // Versioning...
 766                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 767                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 768                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 769                         } else {
 770                                 $this->mTemplateIds[$ns] = $dbks;
 771                         }
 772                 }
 773                 // Page title
 774                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 775                         $this->setPageTitle( $dt );
 776                 else if ( ( $title = $parserOutput->getTitleText() ) != '' )
 777                         $this->setPageTitle( $title );
 778
 779                 // Hooks registered in the object
 780                 global $wgParserOutputHooks;
 781                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 782                         list( $hookName, $data ) = $hookInfo;
 783                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 784                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 785                         }
 786                 }
 787
 788                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 789         }
 790
 791         /**
 792          * @todo document
 793          * @param ParserOutput &$parserOutput
 794          */
 795         function addParserOutput( &$parserOutput ) {
 796                 $this->addParserOutputNoText( $parserOutput );
 797                 $text = $parserOutput->getText();
 798                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 799                 $this->addHTML( $text );
 800         }
 801
 802         /**
 803          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 804          * Saves the text into the parser cache if possible.
 805          *
 806          * @param string  $text
 807          * @param Article $article
 808          * @param bool    $cache
 809          * @deprecated Use Article::outputWikitext
 810          */
 811         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 812                 global $wgParser;
 813
 814                 wfDeprecated( __METHOD__ );
 815
 816                 $popts = $this->parserOptions();
 817                 $popts->setTidy(true);
 818                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 819                         $popts, true, true, $this->mRevisionId );
 820                 $popts->setTidy(false);
 821                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 822                         $parserCache = ParserCache::singleton();
 823                         $parserCache->save( $parserOutput, $article, $popts);
 824                 }
 825
 826                 $this->addParserOutput( $parserOutput );
 827         }
 828
 829         /**
 830          * @deprecated use addWikiTextTidy()
 831          */
 832         public function addSecondaryWikiText( $text, $linestart = true ) {
 833                 wfDeprecated( __METHOD__ );
 834                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 835         }
 836
 837         /**
 838          * Add wikitext with tidy enabled
 839          */
 840         public function addWikiTextTidy(  $text, $linestart = true ) {
 841                 $title = $this->getTitle();
 842                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 843         }
 844
 845
 846         /**
 847          * Add the output of a QuickTemplate to the output buffer
 848          *
 849          * @param QuickTemplate $template
 850          */
 851         public function addTemplate( &$template ) {
 852                 ob_start();
 853                 $template->execute();
 854                 $this->addHTML( ob_get_contents() );
 855                 ob_end_clean();
 856         }
 857
 858         /**
 859          * Parse wikitext and return the HTML.
 860          *
 861          * @param string $text
 862          * @param bool   $linestart Is this the start of a line?
 863          * @param bool   $interface ??
 864          */
 865         public function parse( $text, $linestart = true, $interface = false ) {
 866                 global $wgParser;
 867                 if( is_null( $this->getTitle() ) ) {
 868                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 869                 }
 870                 $popts = $this->parserOptions();
 871                 if ( $interface) { $popts->setInterfaceMessage(true); }
 872                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 873                         $linestart, true, $this->mRevisionId );
 874                 if ( $interface) { $popts->setInterfaceMessage(false); }
 875                 return $parserOutput->getText();
 876         }
 877
 878         /** Parse wikitext, strip paragraphs, and return the HTML. */
 879         public function parseInline( $text, $linestart = true, $interface = false ) {
 880                 $parsed = $this->parse( $text, $linestart, $interface );
 881
 882                 $m = array();
 883                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 884                         $parsed = $m[1];
 885                 }
 886
 887                 return $parsed;
 888         }
 889
 890         /**
 891          * @param Article $article
 892          * @param User    $user
 893          *
 894          * @deprecated
 895          *
 896          * @return bool True if successful, else false.
 897          */
 898         public function tryParserCache( &$article ) {
 899                 wfDeprecated( __METHOD__ );
 900                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 901
 902                 if ($parserOutput !== false) {
 903                         $this->addParserOutput( $parserOutput );
 904                         return true;
 905                 } else {
 906                         return false;
 907                 }
 908         }
 909
 910         /**
 911          * @param int $maxage Maximum cache time on the Squid, in seconds.
 912          */
 913         public function setSquidMaxage( $maxage ) {
 914                 $this->mSquidMaxage = $maxage;
 915         }
 916
 917         /**
 918          * Use enableClientCache(false) to force it to send nocache headers
 919          * @param $state ??
 920          */
 921         public function enableClientCache( $state ) {
 922                 return wfSetVar( $this->mEnableClientCache, $state );
 923         }
 924
 925         function getCacheVaryCookies() {
 926                 global $wgCookiePrefix, $wgCacheVaryCookies;
 927                 static $cookies;
 928                 if ( $cookies === null ) {
 929                         $cookies = array_merge(
 930                                 array(
 931                                         "{$wgCookiePrefix}Token",
 932                                         "{$wgCookiePrefix}LoggedOut",
 933                                         session_name()
 934                                 ),
 935                                 $wgCacheVaryCookies
 936                         );
 937                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 938                 }
 939                 return $cookies;
 940         }
 941
 942         function uncacheableBecauseRequestVars() {
 943                 global $wgRequest;
 944                 return  $wgRequest->getText('useskin', false) === false
 945                         && $wgRequest->getText('uselang', false) === false;
 946         }
 947
 948         /**
 949          * Check if the request has a cache-varying cookie header
 950          * If it does, it's very important that we don't allow public caching
 951          */
 952         function haveCacheVaryCookies() {
 953                 global $wgRequest;
 954                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 955                 if ( $cookieHeader === false ) {
 956                         return false;
 957                 }
 958                 $cvCookies = $this->getCacheVaryCookies();
 959                 foreach ( $cvCookies as $cookieName ) {
 960                         # Check for a simple string match, like the way squid does it
 961                         if ( strpos( $cookieHeader, $cookieName ) ) {
 962                                 wfDebug( __METHOD__.": found $cookieName\n" );
 963                                 return true;
 964                         }
 965                 }
 966                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 967                 return false;
 968         }
 969
 970         /** Get a complete X-Vary-Options header */
 971         public function getXVO() {
 972                 $cvCookies = $this->getCacheVaryCookies();
 973                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 974                 $first = true;
 975                 foreach ( $cvCookies as $cookieName ) {
 976                         if ( $first ) {
 977                                 $first = false;
 978                         } else {
 979                                 $xvo .= ';';
 980                         }
 981                         $xvo .= 'string-contains=' . $cookieName;
 982                 }
 983                 return $xvo;
 984         }
 985
 986         public function sendCacheControl() {
 987                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 988
 989                 $response = $wgRequest->response();
 990                 if ($wgUseETag && $this->mETag)
 991                         $response->header("ETag: $this->mETag");
 992
 993                 # don't serve compressed data to clients who can't handle it
 994                 # maintain different caches for logged-in users and non-logged in ones
 995                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 996
 997                 if ( $wgUseXVO ) {
 998                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 999                         $response->header( $this->getXVO() );
1000                 }
1001
1002                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
1003                         if( $wgUseSquid && session_id() == '' &&
1004                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
1005                         {
1006                                 if ( $wgUseESI ) {
1007                                         # We'll purge the proxy cache explicitly, but require end user agents
1008                                         # to revalidate against the proxy on each visit.
1009                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
1010                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
1011                                         # start with a shorter timeout for initial testing
1012                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
1013                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
1014                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
1015                                 } else {
1016                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
1017                                         # to revalidate against the proxy on each visit.
1018                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
1019                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
1020                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
1021                                         # start with a shorter timeout for initial testing
1022                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
1023                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1024                                 }
1025                         } else {
1026                                 # We do want clients to cache if they can, but they *must* check for updates
1027                                 # on revisiting the page.
1028                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1029                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1030                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1031                         }
1032                         if($this->mLastModified) {
1033                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1034                         }
1035                 } else {
1036                         wfDebug( __METHOD__ . ": no caching **\n", false );
1037
1038                         # In general, the absence of a last modified header should be enough to prevent
1039                         # the client from using its cache. We send a few other things just to make sure.
1040                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1041                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1042                         $response->header( 'Pragma: no-cache' );
1043                 }
1044         }
1045
1046         /**
1047          * Finally, all the text has been munged and accumulated into
1048          * the object, let's actually output it:
1049          */
1050         public function output() {
1051                 global $wgUser, $wgOutputEncoding, $wgRequest;
1052                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1053                 global $wgJsMimeType, $wgUseAjax, $wgAjaxWatch;
1054                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1055                 global $wgArticle;
1056
1057                 if( $this->mDoNothing ){
1058                         return;
1059                 }
1060                 wfProfileIn( __METHOD__ );
1061                 if ( '' != $this->mRedirect ) {
1062                         # Standards require redirect URLs to be absolute
1063                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1064                         if( $this->mRedirectCode == '301') {
1065                                 if( !$wgDebugRedirects ) {
1066                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
1067                                 }
1068                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1069                         }
1070                         $this->sendCacheControl();
1071
1072                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
1073                         if( $wgDebugRedirects ) {
1074                                 $url = htmlspecialchars( $this->mRedirect );
1075                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1076                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1077                                 print "</body>\n</html>\n";
1078                         } else {
1079                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
1080                         }
1081                         wfProfileOut( __METHOD__ );
1082                         return;
1083                 }
1084                 elseif ( $this->mStatusCode )
1085                 {
1086                         $statusMessage = array(
1087                                 100 => 'Continue',
1088                                 101 => 'Switching Protocols',
1089                                 102 => 'Processing',
1090                                 200 => 'OK',
1091                                 201 => 'Created',
1092                                 202 => 'Accepted',
1093                                 203 => 'Non-Authoritative Information',
1094                                 204 => 'No Content',
1095                                 205 => 'Reset Content',
1096                                 206 => 'Partial Content',
1097                                 207 => 'Multi-Status',
1098                                 300 => 'Multiple Choices',
1099                                 301 => 'Moved Permanently',
1100                                 302 => 'Found',
1101                                 303 => 'See Other',
1102                                 304 => 'Not Modified',
1103                                 305 => 'Use Proxy',
1104                                 307 => 'Temporary Redirect',
1105                                 400 => 'Bad Request',
1106                                 401 => 'Unauthorized',
1107                                 402 => 'Payment Required',
1108                                 403 => 'Forbidden',
1109                                 404 => 'Not Found',
1110                                 405 => 'Method Not Allowed',
1111                                 406 => 'Not Acceptable',
1112                                 407 => 'Proxy Authentication Required',
1113                                 408 => 'Request Timeout',
1114                                 409 => 'Conflict',
1115                                 410 => 'Gone',
1116                                 411 => 'Length Required',
1117                                 412 => 'Precondition Failed',
1118                                 413 => 'Request Entity Too Large',
1119                                 414 => 'Request-URI Too Large',
1120                                 415 => 'Unsupported Media Type',
1121                                 416 => 'Request Range Not Satisfiable',
1122                                 417 => 'Expectation Failed',
1123                                 422 => 'Unprocessable Entity',
1124                                 423 => 'Locked',
1125                                 424 => 'Failed Dependency',
1126                                 500 => 'Internal Server Error',
1127                                 501 => 'Not Implemented',
1128                                 502 => 'Bad Gateway',
1129                                 503 => 'Service Unavailable',
1130                                 504 => 'Gateway Timeout',
1131                                 505 => 'HTTP Version Not Supported',
1132                                 507 => 'Insufficient Storage'
1133                         );
1134
1135                         if ( $statusMessage[$this->mStatusCode] )
1136                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
1137                 }
1138
1139                 $sk = $wgUser->getSkin();
1140
1141                 // add our core scripts to output
1142                 $this->addCoreScripts2Top();
1143
1144                 if ( $wgUseAjax ) {
1145                         $this->addScriptFile( 'ajax.js' );
1146
1147                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1148
1149                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1150                                 $this->addScriptFile( 'ajaxwatch.js' );
1151                         }
1152
1153                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1154                                 $this->addScriptFile( 'mwsuggest.js' );
1155                         }
1156                 }
1157
1158                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1159                         $this->addScriptFile( 'rightclickedit.js' );
1160                 }
1161
1162                 if( $wgUniversalEditButton ) {
1163                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1164                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1165                                 // Original UniversalEditButton
1166                                 $this->addLink( array(
1167                                         'rel' => 'alternate',
1168                                         'type' => 'application/x-wiki',
1169                                         'title' => wfMsg( 'edit' ),
1170                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1171                                 ) );
1172                                 // Alternate edit link
1173                                 $this->addLink( array(
1174                                         'rel' => 'edit',
1175                                         'title' => wfMsg( 'edit' ),
1176                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1177                                 ) );
1178                         }
1179                 }
1180
1181                 # Buffer output; final headers may depend on later processing
1182                 ob_start();
1183
1184                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1185                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1186
1187                 if ($this->mArticleBodyOnly) {
1188                         $this->out($this->mBodytext);
1189                 } else {
1190                         // Hook that allows last minute changes to the output page, e.g.
1191                         // adding of CSS or Javascript by extensions.
1192                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1193
1194                         wfProfileIn( 'Output-skin' );
1195                         $sk->outputPage( $this );
1196                         wfProfileOut( 'Output-skin' );
1197                 }
1198
1199                 $this->sendCacheControl();
1200                 ob_end_flush();
1201                 wfProfileOut( __METHOD__ );
1202         }
1203
1204         /**
1205          * Actually output something with print(). Performs an iconv to the
1206          * output encoding, if needed.
1207          * @param string $ins The string to output
1208          */
1209         public function out( $ins ) {
1210                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1211                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1212                         $outs = $ins;
1213                 } else {
1214                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1215                         if ( false === $outs ) { $outs = $ins; }
1216                 }
1217                 print $outs;
1218         }
1219
1220         /**
1221          * @todo document
1222          */
1223         public static function setEncodings() {
1224                 global $wgInputEncoding, $wgOutputEncoding;
1225                 global $wgContLang;
1226
1227                 $wgInputEncoding = strtolower( $wgInputEncoding );
1228
1229                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1230                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1231                         return;
1232                 }
1233                 $wgOutputEncoding = $wgInputEncoding;
1234         }
1235
1236         /**
1237          * Deprecated, use wfReportTime() instead.
1238          * @return string
1239          * @deprecated
1240          */
1241         public function reportTime() {
1242                 wfDeprecated( __METHOD__ );
1243                 $time = wfReportTime();
1244                 return $time;
1245         }
1246
1247         /**
1248          * Produce a "user is blocked" page.
1249          *
1250          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1251          * @return nothing
1252          */
1253         function blockedPage( $return = true ) {
1254                 global $wgUser, $wgContLang, $wgLang;
1255
1256                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1257                 $this->setRobotPolicy( 'noindex,nofollow' );
1258                 $this->setArticleRelated( false );
1259
1260                 $name = User::whoIs( $wgUser->blockedBy() );
1261                 $reason = $wgUser->blockedFor();
1262                 if( $reason == '' ) {
1263                         $reason = wfMsg( 'blockednoreason' );
1264                 }
1265                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1266                 $ip = wfGetIP();
1267
1268                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1269
1270                 $blockid = $wgUser->mBlock->mId;
1271
1272                 $blockExpiry = $wgUser->mBlock->mExpiry;
1273                 if ( $blockExpiry == 'infinity' ) {
1274                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1275                         // Search for localization in 'ipboptions'
1276                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1277                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1278                                 if ( strpos( $option, ":" ) === false )
1279                                         continue;
1280                                 list( $show, $value ) = explode( ":", $option );
1281                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1282                                         $blockExpiry = $show;
1283                                         break;
1284                                 }
1285                         }
1286                 } else {
1287                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1288                 }
1289
1290                 if ( $wgUser->mBlock->mAuto ) {
1291                         $msg = 'autoblockedtext';
1292                 } else {
1293                         $msg = 'blockedtext';
1294                 }
1295
1296                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1297                  * This could be a username, an ip range, or a single ip. */
1298                 $intended = $wgUser->mBlock->mAddress;
1299
1300                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1301
1302                 # Don't auto-return to special pages
1303                 if( $return ) {
1304                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1305                         $this->returnToMain( null, $return );
1306                 }
1307         }
1308
1309         /**
1310          * Output a standard error page
1311          *
1312          * @param string $title Message key for page title
1313          * @param string $msg Message key for page text
1314          * @param array $params Message parameters
1315          */
1316         public function showErrorPage( $title, $msg, $params = array() ) {
1317                 if ( $this->getTitle() ) {
1318                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1319                 }
1320                 $this->setPageTitle( wfMsg( $title ) );
1321                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1322                 $this->setRobotPolicy( 'noindex,nofollow' );
1323                 $this->setArticleRelated( false );
1324                 $this->enableClientCache( false );
1325                 $this->mRedirect = '';
1326                 $this->mBodytext = '';
1327
1328                 array_unshift( $params, 'parse' );
1329                 array_unshift( $params, $msg );
1330                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1331
1332                 $this->returnToMain();
1333         }
1334
1335         /**
1336          * Output a standard permission error page
1337          *
1338          * @param array $errors Error message keys
1339          */
1340         public function showPermissionsErrorPage( $errors, $action = null )
1341         {
1342                 $this->mDebugtext .= 'Original title: ' .
1343                 $this->getTitle()->getPrefixedText() . "\n";
1344                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1345                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1346                 $this->setRobotPolicy( 'noindex,nofollow' );
1347                 $this->setArticleRelated( false );
1348                 $this->enableClientCache( false );
1349                 $this->mRedirect = '';
1350                 $this->mBodytext = '';
1351                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1352         }
1353
1354         /** @deprecated */
1355         public function errorpage( $title, $msg ) {
1356                 wfDeprecated( __METHOD__ );
1357                 throw new ErrorPageError( $title, $msg );
1358         }
1359
1360         /**
1361          * Display an error page indicating that a given version of MediaWiki is
1362          * required to use it
1363          *
1364          * @param mixed $version The version of MediaWiki needed to use the page
1365          */
1366         public function versionRequired( $version ) {
1367                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1368                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1369                 $this->setRobotPolicy( 'noindex,nofollow' );
1370                 $this->setArticleRelated( false );
1371                 $this->mBodytext = '';
1372
1373                 $this->addWikiMsg( 'versionrequiredtext', $version );
1374                 $this->returnToMain();
1375         }
1376
1377         /**
1378          * Display an error page noting that a given permission bit is required.
1379          *
1380          * @param string $permission key required
1381          */
1382         public function permissionRequired( $permission ) {
1383                 global $wgLang;
1384
1385                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1386                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1387                 $this->setRobotPolicy( 'noindex,nofollow' );
1388                 $this->setArticleRelated( false );
1389                 $this->mBodytext = '';
1390
1391                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1392                         User::getGroupsWithPermission( $permission ) );
1393                 if( $groups ) {
1394                         $this->addWikiMsg( 'badaccess-groups',
1395                                 $wgLang->commaList( $groups ),
1396                                 count( $groups) );
1397                 } else {
1398                         $this->addWikiMsg( 'badaccess-group0' );
1399                 }
1400                 $this->returnToMain();
1401         }
1402
1403         /**
1404          * Use permissionRequired.
1405          * @deprecated
1406          */
1407         public function sysopRequired() {
1408                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1409         }
1410
1411         /**
1412          * Use permissionRequired.
1413          * @deprecated
1414          */
1415         public function developerRequired() {
1416                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1417         }
1418
1419         /**
1420          * Produce the stock "please login to use the wiki" page
1421          */
1422         public function loginToUse() {
1423                 global $wgUser, $wgContLang;
1424
1425                 if( $wgUser->isLoggedIn() ) {
1426                         $this->permissionRequired( 'read' );
1427                         return;
1428                 }
1429
1430                 $skin = $wgUser->getSkin();
1431
1432                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1433                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1434                 $this->setRobotPolicy( 'noindex,nofollow' );
1435                 $this->setArticleFlag( false );
1436
1437                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1438                 $loginLink = $skin->link(
1439                         $loginTitle,
1440                         wfMsgHtml( 'loginreqlink' ),
1441                         array(),
1442                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1443                         array( 'known', 'noclasses' )
1444                 );
1445                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1446                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1447
1448                 # Don't return to the main page if the user can't read it
1449                 # otherwise we'll end up in a pointless loop
1450                 $mainPage = Title::newMainPage();
1451                 if( $mainPage->userCanRead() )
1452                         $this->returnToMain( null, $mainPage );
1453         }
1454
1455         /** @deprecated */
1456         public function databaseError( $fname, $sql, $error, $errno ) {
1457                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1458         }
1459
1460         /**
1461          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1462          * @return string The wikitext error-messages, formatted into a list.
1463          */
1464         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1465                 if ($action == null) {
1466                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1467                 } else {
1468                         global $wgLang;
1469                         $action_desc = wfMsgNoTrans( "action-$action" );
1470                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1471                 }
1472
1473                 if (count( $errors ) > 1) {
1474                         $text .= '<ul class="permissions-errors">' . "\n";
1475
1476                         foreach( $errors as $error )
1477                         {
1478                                 $text .= '<li>';
1479                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1480                                 $text .= "</li>\n";
1481                         }
1482                         $text .= '</ul>';
1483                 } else {
1484                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1485                 }
1486
1487                 return $text;
1488         }
1489
1490         /**
1491          * Display a page stating that the Wiki is in read-only mode,
1492          * and optionally show the source of the page that the user
1493          * was trying to edit.  Should only be called (for this
1494          * purpose) after wfReadOnly() has returned true.
1495          *
1496          * For historical reasons, this function is _also_ used to
1497          * show the error message when a user tries to edit a page
1498          * they are not allowed to edit.  (Unless it's because they're
1499          * blocked, then we show blockedPage() instead.)  In this
1500          * case, the second parameter should be set to true and a list
1501          * of reasons supplied as the third parameter.
1502          *
1503          * @todo Needs to be split into multiple functions.
1504          *
1505          * @param string $source    Source code to show (or null).
1506          * @param bool   $protected Is this a permissions error?
1507          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1508          */
1509         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1510                 global $wgUser;
1511                 $skin = $wgUser->getSkin();
1512
1513                 $this->setRobotPolicy( 'noindex,nofollow' );
1514                 $this->setArticleRelated( false );
1515
1516                 // If no reason is given, just supply a default "I can't let you do
1517                 // that, Dave" message.  Should only occur if called by legacy code.
1518                 if ( $protected && empty($reasons) ) {
1519                         $reasons[] = array( 'badaccess-group0' );
1520                 }
1521
1522                 if ( !empty($reasons) ) {
1523                         // Permissions error
1524                         if( $source ) {
1525                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1526                                 $this->setSubtitle(
1527                                         wfMsg(
1528                                                 'viewsourcefor',
1529                                                 $skin->link(
1530                                                         $this->getTitle(),
1531                                                         null,
1532                                                         array(),
1533                                                         array(),
1534                                                         array( 'known', 'noclasses' )
1535                                                 )
1536                                         )
1537                                 );
1538                         } else {
1539                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1540                         }
1541                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1542                 } else {
1543                         // Wiki is read only
1544                         $this->setPageTitle( wfMsg( 'readonly' ) );
1545                         $reason = wfReadOnlyReason();
1546                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1547                 }
1548
1549                 // Show source, if supplied
1550                 if( is_string( $source ) ) {
1551                         $this->addWikiMsg( 'viewsourcetext' );
1552                         $text = Xml::openElement( 'textarea',
1553                                                 array( 'id'   => 'wpTextbox1',
1554                                                        'name' => 'wpTextbox1',
1555                                                        'cols' => $wgUser->getOption( 'cols' ),
1556                                                        'rows' => $wgUser->getOption( 'rows' ),
1557                                                        'readonly' => 'readonly' ) );
1558                         $text .= htmlspecialchars( $source );
1559                         $text .= Xml::closeElement( 'textarea' );
1560                         $this->addHTML( $text );
1561
1562                         // Show templates used by this article
1563                         $skin = $wgUser->getSkin();
1564                         $article = new Article( $this->getTitle() );
1565                         $this->addHTML( "<div class='templatesUsed'>
1566 {$skin->formatTemplates( $article->getUsedTemplates() )}
1567 </div>
1568 " );
1569                 }
1570
1571                 # If the title doesn't exist, it's fairly pointless to print a return
1572                 # link to it.  After all, you just tried editing it and couldn't, so
1573                 # what's there to do there?
1574                 if( $this->getTitle()->exists() ) {
1575                         $this->returnToMain( null, $this->getTitle() );
1576                 }
1577         }
1578
1579         /** @deprecated */
1580         public function fatalError( $message ) {
1581                 wfDeprecated( __METHOD__ );
1582                 throw new FatalError( $message );
1583         }
1584
1585         /** @deprecated */
1586         public function unexpectedValueError( $name, $val ) {
1587                 wfDeprecated( __METHOD__ );
1588                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1589         }
1590
1591         /** @deprecated */
1592         public function fileCopyError( $old, $new ) {
1593                 wfDeprecated( __METHOD__ );
1594                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1595         }
1596
1597         /** @deprecated */
1598         public function fileRenameError( $old, $new ) {
1599                 wfDeprecated( __METHOD__ );
1600                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1601         }
1602
1603         /** @deprecated */
1604         public function fileDeleteError( $name ) {
1605                 wfDeprecated( __METHOD__ );
1606                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1607         }
1608
1609         /** @deprecated */
1610         public function fileNotFoundError( $name ) {
1611                 wfDeprecated( __METHOD__ );
1612                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1613         }
1614
1615         public function showFatalError( $message ) {
1616                 $this->setPageTitle( wfMsg( "internalerror" ) );
1617                 $this->setRobotPolicy( "noindex,nofollow" );
1618                 $this->setArticleRelated( false );
1619                 $this->enableClientCache( false );
1620                 $this->mRedirect = '';
1621                 $this->mBodytext = $message;
1622         }
1623
1624         public function showUnexpectedValueError( $name, $val ) {
1625                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1626         }
1627
1628         public function showFileCopyError( $old, $new ) {
1629                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1630         }
1631
1632         public function showFileRenameError( $old, $new ) {
1633                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1634         }
1635
1636         public function showFileDeleteError( $name ) {
1637                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1638         }
1639
1640         public function showFileNotFoundError( $name ) {
1641                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1642         }
1643
1644         /**
1645          * Add a "return to" link pointing to a specified title
1646          *
1647          * @param Title $title Title to link
1648          * @param string $query Query string
1649          */
1650         public function addReturnTo( $title, $query = array() ) {
1651                 global $wgUser;
1652                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1653                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1654                         $title, null, array(), $query ) );
1655                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1656         }
1657
1658         /**
1659          * Add a "return to" link pointing to a specified title,
1660          * or the title indicated in the request, or else the main page
1661          *
1662          * @param null $unused No longer used
1663          * @param Title $returnto Title to return to
1664          */
1665         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1666                 global $wgRequest;
1667
1668                 if ( $returnto == null ) {
1669                         $returnto = $wgRequest->getText( 'returnto' );
1670                 }
1671
1672                 if ( $returntoquery == null ) {
1673                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1674                 }
1675
1676                 if ( '' === $returnto ) {
1677                         $returnto = Title::newMainPage();
1678                 }
1679
1680                 if ( is_object( $returnto ) ) {
1681                         $titleObj = $returnto;
1682                 } else {
1683                         $titleObj = Title::newFromText( $returnto );
1684                 }
1685                 if ( !is_object( $titleObj ) ) {
1686                         $titleObj = Title::newMainPage();
1687                 }
1688
1689                 $this->addReturnTo( $titleObj, $returntoquery );
1690         }
1691
1692         /**
1693          * @return string The doctype, opening <html>, and head element.
1694          */
1695         public function headElement( Skin $sk ) {
1696                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1697                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1698                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgEnableScriptLoader, $wgHtml5;
1699
1700                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1701                 if ( $sk->commonPrintStylesheet() ) {
1702                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1703                 }
1704                 $sk->setupUserCss( $this );
1705
1706                 $ret = '';
1707
1708                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1709                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1710                 }
1711
1712                 if ( '' == $this->getHTMLTitle() ) {
1713                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1714                 }
1715
1716                 $dir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1717
1718                 if ( $wgHtml5 ) {
1719                         $ret .= "<!doctype html>\n";
1720                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1721                 } else {
1722                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1723                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1724                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1725                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1726                         }
1727                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1728                 }
1729
1730                 $ret .= "<head>\n\t<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n\t";
1731                 $ret .= implode( "\n", array(
1732                         $this->getHeadLinks(),
1733                         $this->buildCssLinks(),
1734                         $sk->getHeadScripts( $this ),
1735                         $this->getHeadItems(),
1736                 ));
1737                 if( $sk->usercss ){
1738                         $ret .= "<style type='text/css'>{$sk->usercss}</style>";
1739                 }
1740
1741                 if( $wgEnableScriptLoader )
1742                         $ret .= $this->getScriptLoaderJs();
1743
1744                 if ($wgUseTrackbacks && $this->isArticleRelated())
1745                         $ret .= $this->getTitle()->trackbackRDF();
1746
1747                 $ret .= "</head>\n";
1748                 return $ret;
1749         }
1750
1751         protected function addDefaultMeta() {
1752                 global $wgVersion, $wgHtml5;
1753
1754                 static $called = false;
1755                 if ( $called ) {
1756                         # Don't run this twice
1757                         return;
1758                 }
1759                 $called = true;
1760
1761                 if ( !$wgHtml5 ) {
1762                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1763                 }
1764                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1765
1766                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1767                 if( $p !== 'index,follow' ) {
1768                         // http://www.robotstxt.org/wc/meta-user.html
1769                         // Only show if it's different from the default robots policy
1770                         $this->addMeta( 'robots', $p );
1771                 }
1772
1773                 if ( count( $this->mKeywords ) > 0 ) {
1774                         $strip = array(
1775                                 "/<.*?" . ">/" => '',
1776                                 "/_/" => ' '
1777                         );
1778                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1779                 }
1780         }
1781
1782         /**
1783          * @return string HTML tag links to be put in the header.
1784          */
1785         public function getHeadLinks() {
1786                 global $wgRequest, $wgFeed;
1787
1788                 // Ideally this should happen earlier, somewhere. :P
1789                 $this->addDefaultMeta();
1790
1791                 $tags = array();
1792
1793                 foreach ( $this->mMetatags as $tag ) {
1794                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1795                                 $a = 'http-equiv';
1796                                 $tag[0] = substr( $tag[0], 5 );
1797                         } else {
1798                                 $a = 'name';
1799                         }
1800                         $tags[] = Xml::element( 'meta',
1801                                 array(
1802                                         $a => $tag[0],
1803                                         'content' => $tag[1] ) );
1804                 }
1805                 foreach ( $this->mLinktags as $tag ) {
1806                         $tags[] = Xml::element( 'link', $tag );
1807                 }
1808
1809                 if( $wgFeed ) {
1810                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1811                                 # Use the page name for the title (accessed through $wgTitle since
1812                                 # there's no other way).  In principle, this could lead to issues
1813                                 # with having the same name for different feeds corresponding to
1814                                 # the same page, but we can't avoid that at this low a level.
1815
1816                                 $tags[] = $this->feedLink(
1817                                         $format,
1818                                         $link,
1819                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1820                         }
1821
1822                         # Recent changes feed should appear on every page (except recentchanges,
1823                         # that would be redundant). Put it after the per-page feed to avoid
1824                         # changing existing behavior. It's still available, probably via a
1825                         # menu in your browser. Some sites might have a different feed they'd
1826                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1827                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1828                         # If so, use it instead.
1829
1830                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses;
1831                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1832
1833                         if ( $wgOverrideSiteFeed ) {
1834                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1835                                         $tags[] = $this->feedLink (
1836                                                 $type,
1837                                                 htmlspecialchars( $feedUrl ),
1838                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1839                                 }
1840                         }
1841                         else if ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1842                                 foreach( $wgFeedClasses as $format => $class ) {
1843                                         $tags[] = $this->feedLink(
1844                                                 $format,
1845                                                 $rctitle->getLocalURL( "feed={$format}" ),
1846                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1847                                 }
1848                         }
1849                 }
1850
1851                 return implode( "\n\t", $tags ) . "\n";
1852         }
1853
1854         /**
1855          * Return URLs for each supported syndication format for this page.
1856          * @return array associating format keys with URLs
1857          */
1858         public function getSyndicationLinks() {
1859                 global $wgFeedClasses;
1860                 $links = array();
1861
1862                 if( $this->isSyndicated() ) {
1863                         if( is_string( $this->getFeedAppendQuery() ) ) {
1864                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1865                         } else {
1866                                 $appendQuery = "";
1867                         }
1868
1869                         foreach( $wgFeedClasses as $format => $class ) {
1870                                 $links[$format] = $this->getTitle()->getLocalUrl( "feed=$format{$appendQuery}" );
1871                         }
1872                 }
1873                 return $links;
1874         }
1875
1876         /**
1877          * Generate a <link rel/> for an RSS feed.
1878          */
1879         private function feedLink( $type, $url, $text ) {
1880                 return Xml::element( 'link', array(
1881                         'rel' => 'alternate',
1882                         'type' => "application/$type+xml",
1883                         'title' => $text,
1884                         'href' => $url ) );
1885         }
1886
1887         /**
1888          * Add a local or specified stylesheet, with the given media options.
1889          * Meant primarily for internal use...
1890          *
1891          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1892          * @param $conditional -- for IE conditional comments, specifying an IE version
1893          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1894          */
1895         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1896                 $options = array();
1897                 if( $media )
1898                         $options['media'] = $media;
1899                 if( $condition )
1900                         $options['condition'] = $condition;
1901                 if( $dir )
1902                         $options['dir'] = $dir;
1903                 $this->styles[$style] = $options;
1904         }
1905
1906         /**
1907          * Adds inline CSS styles
1908          * @param $style_css Mixed: inline CSS
1909          */
1910         public function addInlineStyle( $style_css ){
1911                 $this->mScripts .= "<style type=\"text/css\">$style_css</style>";
1912         }
1913
1914         /**
1915          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1916          * These will be applied to various media & IE conditionals.
1917          */
1918         public function buildCssLinks() {
1919                 $links = array();
1920                 foreach( $this->styles as $file => $options ) {
1921                         $link = $this->styleLink( $file, $options );
1922                         if( $link )
1923                                 $links[] = $link;
1924                 }
1925
1926                 return "\t" . implode( "\n\t", $links );
1927         }
1928
1929         protected function styleLink( $style, $options ) {
1930                 global $wgRequest;
1931
1932                 if( isset( $options['dir'] ) ) {
1933                         global $wgContLang;
1934                         $siteDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1935                         if( $siteDir != $options['dir'] )
1936                                 return '';
1937                 }
1938
1939                 if( isset( $options['media'] ) ) {
1940                         $media = $this->transformCssMedia( $options['media'] );
1941                         if( is_null( $media ) ) {
1942                                 return '';
1943                         }
1944                 } else {
1945                         $media = '';
1946                 }
1947
1948                 if( substr( $style, 0, 1 ) == '/' ||
1949                         substr( $style, 0, 5 ) == 'http:' ||
1950                         substr( $style, 0, 6 ) == 'https:' ) {
1951                         $url = $style;
1952                 } else {
1953                         global $wgStylePath, $wgStyleVersion;
1954                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1955                 }
1956
1957                 $attribs = array(
1958                         'rel' => 'stylesheet',
1959                         'href' => $url,
1960                         'type' => 'text/css' );
1961                 if( $media ) {
1962                         $attribs['media'] = $media;
1963                 }
1964
1965                 $link = Xml::element( 'link', $attribs );
1966
1967                 if( isset( $options['condition'] ) ) {
1968                         $condition = htmlspecialchars( $options['condition'] );
1969                         $link = "<!--[if $condition]>$link<![endif]-->";
1970                 }
1971                 return $link;
1972         }
1973
1974         function transformCssMedia( $media ) {
1975                 global $wgRequest, $wgHandheldForIPhone;
1976
1977                 // Switch in on-screen display for media testing
1978                 $switches = array(
1979                         'printable' => 'print',
1980                         'handheld' => 'handheld',
1981                 );
1982                 foreach( $switches as $switch => $targetMedia ) {
1983                         if( $wgRequest->getBool( $switch ) ) {
1984                                 if( $media == $targetMedia ) {
1985                                         $media = '';
1986                                 } elseif( $media == 'screen' ) {
1987                                         return null;
1988                                 }
1989                         }
1990                 }
1991
1992                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1993                 if( $wgHandheldForIPhone ) {
1994                         $mediaAliases = array(
1995                                 'screen' => 'screen and (min-device-width: 481px)',
1996                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1997                         );
1998
1999                         if( isset( $mediaAliases[$media] ) ) {
2000                                 $media = $mediaAliases[$media];
2001                         }
2002                 }
2003
2004                 return $media;
2005         }
2006
2007         /**
2008          * Turn off regular page output and return an error reponse
2009          * for when rate limiting has triggered.
2010          */
2011         public function rateLimited() {
2012
2013                 $this->setPageTitle(wfMsg('actionthrottled'));
2014                 $this->setRobotPolicy( 'noindex,follow' );
2015                 $this->setArticleRelated( false );
2016                 $this->enableClientCache( false );
2017                 $this->mRedirect = '';
2018                 $this->clearHTML();
2019                 $this->setStatusCode(503);
2020                 $this->addWikiMsg( 'actionthrottledtext' );
2021
2022                 $this->returnToMain( null, $this->getTitle() );
2023         }
2024
2025         /**
2026          * Show an "add new section" link?
2027          *
2028          * @return bool
2029          */
2030         public function showNewSectionLink() {
2031                 return $this->mNewSectionLink;
2032         }
2033
2034         /**
2035         * Forcibly hide the new section link?
2036         *
2037         * @return bool
2038         */
2039         public function forceHideNewSectionLink() {
2040                 return $this->mHideNewSectionLink;
2041         }
2042
2043         /**
2044          * Show a warning about slave lag
2045          *
2046          * If the lag is higher than $wgSlaveLagCritical seconds,
2047          * then the warning is a bit more obvious. If the lag is
2048          * lower than $wgSlaveLagWarning, then no warning is shown.
2049          *
2050          * @param int $lag Slave lag
2051          */
2052         public function showLagWarning( $lag ) {
2053                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
2054                 if( $lag >= $wgSlaveLagWarning ) {
2055                         $message = $lag < $wgSlaveLagCritical
2056                                 ? 'lag-warn-normal'
2057                                 : 'lag-warn-high';
2058                         $warning = wfMsgExt( $message, 'parse', $lag );
2059                         $this->addHTML( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
2060                 }
2061         }
2062
2063         /**
2064          * Add a wikitext-formatted message to the output.
2065          * This is equivalent to:
2066          *
2067          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2068          */
2069         public function addWikiMsg( /*...*/ ) {
2070                 $args = func_get_args();
2071                 $name = array_shift( $args );
2072                 $this->addWikiMsgArray( $name, $args );
2073         }
2074
2075         /**
2076          * Add a wikitext-formatted message to the output.
2077          * Like addWikiMsg() except the parameters are taken as an array
2078          * instead of a variable argument list.
2079          *
2080          * $options is passed through to wfMsgExt(), see that function for details.
2081          */
2082         public function addWikiMsgArray( $name, $args, $options = array() ) {
2083                 $options[] = 'parse';
2084                 $text = wfMsgExt( $name, $options, $args );
2085                 $this->addHTML( $text );
2086         }
2087
2088         /**
2089          * This function takes a number of message/argument specifications, wraps them in
2090          * some overall structure, and then parses the result and adds it to the output.
2091          *
2092          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2093          * on. The subsequent arguments may either be strings, in which case they are the
2094          * message names, or arrays, in which case the first element is the message name,
2095          * and subsequent elements are the parameters to that message.
2096          *
2097          * The special named parameter 'options' in a message specification array is passed
2098          * through to the $options parameter of wfMsgExt().
2099          *
2100          * Don't use this for messages that are not in users interface language.
2101          *
2102          * For example:
2103          *
2104          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
2105          *
2106          * Is equivalent to:
2107          *
2108          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
2109          */
2110         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2111                 $msgSpecs = func_get_args();
2112                 array_shift( $msgSpecs );
2113                 $msgSpecs = array_values( $msgSpecs );
2114                 $s = $wrap;
2115                 foreach ( $msgSpecs as $n => $spec ) {
2116                         $options = array();
2117                         if ( is_array( $spec ) ) {
2118                                 $args = $spec;
2119                                 $name = array_shift( $args );
2120                                 if ( isset( $args['options'] ) ) {
2121                                         $options = $args['options'];
2122                                         unset( $args['options'] );
2123                                 }
2124                         }  else {
2125                                 $args = array();
2126                                 $name = $spec;
2127                         }
2128                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2129                 }
2130                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2131         }
2132 }