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         private static readonly CultureInfo _cultureInfo = new CultureInfo("en-US");
  34
  35         public static void Initialize()
  36         {
  37             if (File.Exists(_pathCultureInfoXml))
  38             {
  39                 try
  40                 {
  41                     ParseCultureInfoXml();
  42                 }
  43                 catch
  44                 {
  45                     Log.Warn(LogTag, "Failed to parse CultureInfo.xml");
  46                 }
  47             }
  48
  49             _initialized = true;
  50         }
  51
  52         private static void ParseCultureInfoXml()
  53         {
  54             XmlDocument doc = new XmlDocument();
  55             doc.Load(_pathCultureInfoXml);
  56             XmlElement root = doc.DocumentElement;
  57             foreach (XmlElement node in root.ChildNodes)
  58             {
  59                 if (node.Name != "name" && node.FirstChild == null)
  60                 {
  61                     continue;
  62                 }
  63
  64                 string lang = node.GetAttribute("xml:lang");
  65                 string cultureName = node.FirstChild.Value;
  66                 if (!string.IsNullOrEmpty(lang) && !string.IsNullOrEmpty(cultureName))
  67                 {
  68                     try
  69                     {
  70                         _cultureNames.Add(lang, cultureName);
  71                     }
  72                     catch (ArgumentException e)
  73                     {
  74                         Log.Error(LogTag, "ArgumentException: " + e.Message);
  75                     }
  76                 }
  77             }
  78         }
  79
  80         public static string GetCultureName(string locale)
  81         {
  82             lock (_lock)
  83             {
  84                 if (!_initialized)
  85                 {
  86                     Initialize();
  87                 }
  88
  89                 if (_cultureNames.TryGetValue(locale.ToLower(_cultureInfo), out string cultureName))
  90                 {
  91                     return cultureName;
  92                 }
  93             }
  94
  95             return string.Empty;
  96         }
  97     }
  98 }