Follow-up to r90265: directionality improvements as part of bug 6100 (under $wgBetterDirectionality):

* Use ParserOptions()->getTargetLanguage() for setting the page language/direction
* Set headings on categories in user language/direction
* Only set language/direction when viewing a page (or editing but only preview and textarea)

includes/CategoryPage.php

@@ -179,6 +179,12 @@ class CategoryViewer {
 			$r = wfMsgExt( 'category-empty', array( 'parse' ) );
 		}
 
+		global $wgBetterDirectionality, $wgLang;
+		if( $wgBetterDirectionality ) {
+			$langAttribs = array( 'lang' => $wgLang->getCode(), 'dir' => $wgLang->getDir() );
+			$r = Html::rawElement( 'div', $langAttribs, $r );
+		}
+
 		wfProfileOut( __METHOD__ );
 		return $wgContLang->convert( $r );
 	}
@@ -501,12 +507,21 @@ class CategoryViewer {
 	 */
 	function formatList( $articles, $articles_start_char, $cutoff = 6 ) {
 		if ( count ( $articles ) > $cutoff ) {
-			return self::columnList( $articles, $articles_start_char );
+			$list = self::columnList( $articles, $articles_start_char );
 		} elseif ( count( $articles ) > 0 ) {
 			// for short lists of articles in categories.
-			return self::shortList( $articles, $articles_start_char );
+			$list = self::shortList( $articles, $articles_start_char );
 		}
-		return '';
+		global $wgBetterDirectionality;
+		if( $wgBetterDirectionality ) {
+			global $wgOut, $wgContLang;
+			$getPageLang = $wgOut->parserOptions()->getTargetLanguage();
+			$pageLang = ( $getPageLang ? Language::factory( $getPageLang ) : $wgContLang );
+			$realBodyAttribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir() );
+			$list = Html::rawElement( 'div', $realBodyAttribs, $list );
+		}
+
+		return $list;
 	}
 
 	/**

includes/EditPage.php

@@ -1815,6 +1815,14 @@ HTML
 			'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
 		);
 
+		global $wgBetterDirectionality, $wgContLang;
+		if( $wgBetterDirectionality ) {
+			$getPageLang = $wgOut->parserOptions()->getTargetLanguage( $this->mTitle );
+			$pageLang = ( $getPageLang ? $getPageLang : $wgContLang );
+			$attribs['lang'] = $pageLang->getCode();
+			$attribs['dir'] = $pageLang->getDir();
+		}
+
 		$wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
 	}
 
@@ -2058,13 +2066,6 @@ HTML
 
 				wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
 
-				// Parse mediawiki messages with correct target language
-				if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
-					list( /* $unused */, $lang ) = MessageCache::singleton()->figureMessage( $this->mTitle->getText() );
-					$obj = wfGetLangObj( $lang );
-					$parserOptions->setTargetLanguage( $obj );
-				}
-
 				$parserOptions->setTidy( true );
 				$parserOptions->enableLimitReport();
 				$parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
@@ -2091,6 +2092,13 @@ HTML
 			$wgOut->parse( $note ) . $conflict . "</div>\n";
 
 		wfProfileOut( __METHOD__ );
+		global $wgBetterDirectionality, $wgContLang;
+		if( $wgBetterDirectionality ) {
+			$getPageLang = $wgOut->parserOptions()->getTargetLanguage( $this->mTitle );
+			$pageLang = ( $getPageLang ? $getPageLang : $wgContLang );
+			$realBodyAttribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir() );
+			$previewHTML = Html::rawElement( 'div', $realBodyAttribs, $previewHTML );
+		}
 		return $previewhead . $previewHTML . $this->previewTextAfterContent;
 	}
 

includes/SkinTemplate.php

@@ -455,21 +455,18 @@ class SkinTemplate extends Skin {
 		$tpl->set( 'printfooter', $this->printSource() );
 
 		global $wgBetterDirectionality;
-		if ( $wgBetterDirectionality && $this->getTitle()->getNamespace() != NS_SPECIAL ) {
+		if ( $wgBetterDirectionality ) {
-			if( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
+			// not for special pages AND only when viewing AND if the page exists
-				// If the page is in the MediaWiki NS, the lang and dir attribute should depend on that,
+			// (or is in MW namespace, because that has default content)
-				// i.e. MediaWiki:Message/ar -> lang=ar, dir=rtl. This assumes every message is translated,
+			if( $this->getTitle()->getNamespace() != NS_SPECIAL &&
-				// but it's anyway better than assuming it is always in the content lang
+				in_array( $action, array( 'view', 'render', 'print' ) ) &&
-				$nsMWTitle = $wgContLang->lcfirst( $this->getTitle()->getText() );
+				( $this->getTitle()->exists() || $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) ) {
-				list( $nsMWName, $nsMWLang ) = MessageCache::singleton()->figureMessage( $nsMWTitle );
+				$getPageLang = $out->parserOptions()->getTargetLanguage( $this->getTitle() );
-				$nsMWDir = Language::factory( $nsMWLang )->getDir();
+				$pageLang = ( $getPageLang ? $getPageLang : $wgContLang );
-				$realBodyAttribs = array( 'lang' => $nsMWLang, 'dir' => $nsMWDir );
+				$realBodyAttribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir() );
-			} else {
-				// Body text is in the site content language (see also bug 6100 and 28970)
-				$realBodyAttribs = array( 'lang' => $wgLanguageCode, 'dir' => $wgContLang->getDir() );
-			}
 				$out->mBodytext = Html::rawElement( 'div', $realBodyAttribs, $out->mBodytext );
 			}
+		}
 		$tpl->setRef( 'bodytext', $out->mBodytext );
 
 		# Language links

includes/parser/ParserOptions.php

@@ -66,7 +66,15 @@ class ParserOptions {
 	function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
 	function getTidy()                          { return $this->mTidy; }
 	function getInterfaceMessage()              { return $this->mInterfaceMessage; }
-	function getTargetLanguage()                { return $this->mTargetLanguage; }
+	function getTargetLanguage( $title = null ) {
+		// Parse mediawiki messages with correct target language
+		if ( $title && $title->getNamespace() == NS_MEDIAWIKI ) {
+			list( /* $unused */, $lang ) = MessageCache::singleton()->figureMessage( $title->getText() );
+			$obj = wfGetLangObj( $lang );
+			return $obj;
+		}
+	return $this->mTargetLanguage;
+}
 	function getMaxIncludeSize()                { return $this->mMaxIncludeSize; }
 	function getMaxPPNodeCount()                { return $this->mMaxPPNodeCount; }
 	function getMaxPPExpandDepth()              { return $this->mMaxPPExpandDepth; }