Merge "registration: Only allow one extension to set a specific config setting"

[lhc/web/wiklou.git] / resources / src / mediawiki.language / mediawiki.language.js

diff --git a/resources/src/mediawiki.language/mediawiki.language.js b/resources/src/mediawiki.language/mediawiki.language.js
index 3726a68..45863a3 100644 (file)
--- a/resources/src/mediawiki.language/mediawiki.language.js
+++ b/resources/src/mediawiki.language/mediawiki.language.js
@@ -188,6 +188,45 @@
 
                setSpecialCharacters: function ( data ) {
                        this.specialCharacters = data;
+               },
+
+               /**
+                * Formats language tags according the BCP47 standard.
+                * See LanguageCode::bcp47 for the PHP implementation.
+                *
+                * @param {string} languageTag Well-formed language tag
+                * @return {string}
+                */
+               bcp47: function ( languageTag ) {
+                       var formatted,
+                               isFirstSegment = true,
+                               isPrivate = false,
+                               segments = languageTag.split( '-' );
+
+                       formatted = segments.map( function ( segment ) {
+                               var newSegment;
+
+                               // when previous segment is x, it is a private segment and should be lc
+                               if ( isPrivate ) {
+                                       newSegment = segment.toLowerCase();
+                               // ISO 3166 country code
+                               } else if ( segment.length === 2 && !isFirstSegment ) {
+                                       newSegment = segment.toUpperCase();
+                               // ISO 15924 script code
+                               } else if ( segment.length === 4 && !isFirstSegment ) {
+                                       newSegment = segment.charAt( 0 ).toUpperCase() + segment.substring( 1 ).toLowerCase();
+                               // Use lowercase for other cases
+                               } else {
+                                       newSegment = segment.toLowerCase();
+                               }
+
+                               isPrivate = segment.toLowerCase() === 'x';
+                               isFirstSegment = false;
+
+                               return newSegment;
+                       } );
+
+                       return formatted.join( '-' );
                }
        } );