src/Tizen.Applications.Common/Tizen.Applications/CultureInfoHelper.cs

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 using System;
  18 using System.Collections.Generic;
  19 using System.Globalization;
  20 using System.IO;
  21 using System.Xml;
  22 using Tizen;
  23
  24 namespace Tizen.Applications
  25 {
  26     internal static class CultureInfoHelper
  27     {
  28         private const string LogTag = "Tizen.Applications";
  29         private static bool _initialized = false;
  30         private static readonly Dictionary<string, string> _cultureNames = new Dictionary<string, string>();
  31         private static readonly object _lock = new object();
  32         private const string _pathCultureInfoXml = "/usr/share/dotnet.tizen/framework/i18n/CultureInfo.xml";
  33
  34         public static void Initialize()
  35         {
  36             if (File.Exists(_pathCultureInfoXml))
  37             {
  38                 try
  39                 {
  40                     ParseCultureInfoXml();
  41                 }
  42                 catch
  43                 {
  44                     Log.Warn(LogTag, "Failed to parse CultureInfo.xml");
  45                 }
  46             }
  47
  48             _initialized = true;
  49         }
  50
  51         private static void ParseCultureInfoXml()
  52         {
  53             XmlDocument doc = new XmlDocument();
  54             doc.Load(_pathCultureInfoXml);
  55             XmlElement root = doc.DocumentElement;
  56             foreach (XmlElement node in root.ChildNodes)
  57             {
  58                 if (node.Name != "name" && node.FirstChild == null)
  59                 {
  60                     continue;
  61                 }
  62
  63                 string lang = node.GetAttribute("xml:lang");
  64                 string cultureName = node.FirstChild.Value;
  65                 if (!string.IsNullOrEmpty(lang) && !string.IsNullOrEmpty(cultureName))
  66                 {
  67                     try
  68                     {
  69                         _cultureNames.Add(lang, cultureName);
  70                     }
  71                     catch (ArgumentException e)
  72                     {
  73                         Log.Error(LogTag, "ArgumentException: " + e.Message);
  74                     }
  75                 }
  76             }
  77         }
  78
  79         public static string GetCultureName(string locale)
  80         {
  81             lock (_lock)
  82             {
  83                 if (!_initialized)
  84                 {
  85                     Initialize();
  86                 }
  87
  88                 if (_cultureNames.TryGetValue(locale.ToLowerInvariant(), out string cultureName))
  89                 {
  90                     return cultureName;
  91                 }
  92             }
  93
  94             return string.Empty;
  95         }
  96     }
  97 }