Title.php: Support DB language in getPageViewLanguage()

If a page language in database is set then use the current preferred variant
of this language.

Bug: T117667
Change-Id: Idfe1165346ae0068a4b73de441dc9dfa107b8e8b

diff --git a/includes/Title.php b/includes/Title.php
index 90ac89c..c0ec97f 100644 (file)
--- a/includes/Title.php
+++ b/includes/Title.php
@@ -4699,6 +4699,18 @@ class Title implements LinkTarget {
                        return $wgLang;
                }
 
+               // Checking if DB language is set
+               $dbPageLanguage = $this->getDbPageLanguageCode();
+               if ( $dbPageLanguage ) {
+                       $pageLang = wfGetLangObj( $dbPageLanguage );
+                       $variant = $pageLang->getPreferredVariant();
+                       if ( $pageLang->getCode() !== $variant ) {
+                               $pageLang = Language::factory( $variant );
+                       }
+
+                       return $pageLang;
+               }
+
                // @note Can't be cached persistently, depends on user settings.
                // @note ContentHandler::getPageViewLanguage() may need to load the
                //   content to determine the page language!