1 files changed, 71 insertions, 0 deletions
diff --git a/i18nlangtag/source/languagetag/languagetagicu.cxx b/i18nlangtag/source/languagetag/languagetagicu.cxx
new file mode 100644
index 000000000..fd1c9bc75
--- /dev/null
+++ b/i18nlangtag/source/languagetag/languagetagicu.cxx
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <i18nlangtag/languagetagicu.hxx>
+#include <i18nlangtag/languagetag.hxx>
+
+
+// static
+icu::Locale LanguageTagIcu::getIcuLocale( const LanguageTag & rLanguageTag )
+{
+    if (rLanguageTag.isIsoLocale())
+    {
+        // The simple case.
+        const css::lang::Locale& rLocale = rLanguageTag.getLocale();
+        if (rLocale.Country.isEmpty())
+            return icu::Locale( OUStringToOString( rLocale.Language, RTL_TEXTENCODING_ASCII_US).getStr());
+        return icu::Locale(
+                OUStringToOString( rLocale.Language, RTL_TEXTENCODING_ASCII_US).getStr(),
+                OUStringToOString( rLocale.Country, RTL_TEXTENCODING_ASCII_US).getStr());
+    }
+
+    /* TODO: could we optimize this for the isIsoODF() case where only a script
+     * is added? */
+
+    // Let ICU decide how it wants a BCP47 string stuffed into its Locale.
+    return icu::Locale::createFromName(
+            OUStringToOString( rLanguageTag.getBcp47(), RTL_TEXTENCODING_ASCII_US).getStr());
+}
+
+
+// static
+icu::Locale LanguageTagIcu::getIcuLocale( const LanguageTag & rLanguageTag, std::u16string_view rVariant, std::u16string_view rKeywords )
+{
+    /* 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(),
+            OUStringToOString( rKeywords, RTL_TEXTENCODING_ASCII_US).getStr()
+           );
+}
+
+// static
+OUString LanguageTagIcu::getDisplayName( const LanguageTag & rLanguageTag, const LanguageTag & rDisplayLanguage )
+{
+    // This will be initialized by the first call; as the UI language doesn't
+    // change the tag mostly stays the same, unless someone overrides it for a
+    // call here, and thus obtaining the UI icu::Locale has to be done only
+    // once.
+    static thread_local LanguageTag aUITag( LANGUAGE_SYSTEM);
+    static thread_local icu::Locale aUILocale;
+
+    if (aUITag != rDisplayLanguage)
+    {
+        aUITag = rDisplayLanguage;
+        aUILocale = getIcuLocale( rDisplayLanguage);
+    }
+
+    icu::Locale aLocale( getIcuLocale( rLanguageTag));
+    icu::UnicodeString aResult;
+    aLocale.getDisplayName( aUILocale, aResult);
+    return OUString( reinterpret_cast<const sal_Unicode*>(aResult.getBuffer()), aResult.length());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */