added LanguageTagIcu::getIcuLocale() with additional variant

Change-Id: I5a5689f449ac7653bb716f2ce67ea1039fe2559c

i18nlangtag/source/languagetag/languagetagicu.cxx

@@ -33,4 +33,15 @@ icu::Locale LanguageTagIcu::getIcuLocale( const LanguageTag & rLanguageTag )
             OUStringToOString( rLanguageTag.getBcp47(), RTL_TEXTENCODING_ASCII_US).getStr());
 }
 
+
+// static
+icu::Locale LanguageTagIcu::getIcuLocale( const LanguageTag & rLanguageTag, const OUString & rVariant )
+{
+    /* FIXME: how should this work with any BCP47? */
+    return icu::Locale(
+            OUStringToOString( rLanguageTag.getLanguage(), RTL_TEXTENCODING_ASCII_US).getStr(),
+            OUStringToOString( rLanguageTag.getCountry(), RTL_TEXTENCODING_ASCII_US).getStr(),
+            OUStringToOString( rVariant, RTL_TEXTENCODING_ASCII_US).getStr());
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

include/i18nlangtag/languagetagicu.hxx

@@ -12,6 +12,7 @@
 
 #include <sal/config.h>
 #include <i18nlangtag/i18nlangtagdllapi.h>
+#include <rtl/ustring.hxx>
 #include <unicode/locid.h>
 
 class LanguageTag;
@@ -37,6 +38,17 @@ public:
         Always resolves an empty tag to the system locale.
      */
     static  icu::Locale     getIcuLocale( const LanguageTag & rLanguageTag );
+
+    /** Obtain language tag as ICU icu::Locale, adding variant data.
+
+        From the LanguageTag only language and country are used to construct
+        the icu:Locale, the variant field is copied from rVariant. For example
+        needed to create an icu::Collator instance where the variant field
+        denotes the algorithm to be used.
+
+        Always resolves an empty tag to the system locale.
+     */
+    static  icu::Locale     getIcuLocale( const LanguageTag & rLanguageTag, const OUString & rVariant );
 };
 
 #endif  // INCLUDED_I18NLANGTAG_LANGUAGETAGICU_HXX