/Application/GUI/Languages/XmlLanguageDictionary.cs

  1using System;
  2using System.Collections.Generic;
  3using System.Text;
  4using System.IO;
  5using System.Xml;
  6using System.Globalization;
  7using System.Diagnostics;
  8using System.Windows;
  9using System.ComponentModel;
 10
 11namespace Tomers.WPF.Localization
 12{
 13	public class XmlLanguageDictionary : LanguageDictionary
 14	{
 15		private Dictionary<string, Dictionary<string, string>> _data =
 16			new Dictionary<string, Dictionary<string, string>>();
 17
 18		private string _path;
 19		private string _cultureName;
 20		private string _englishName;
 21
 22		public string Path
 23		{
 24			get { return _path;  }
 25			set { _path = value; }
 26		}
 27
 28		public override string CultureName
 29		{
 30			get { return _cultureName; }
 31		}
 32
 33		public override string EnglishName
 34		{
 35			get { return _englishName; }
 36		}
 37
 38		public XmlLanguageDictionary(string path)
 39		{
 40			if (!File.Exists(path))
 41			{
 42				throw new ArgumentException(string.Format("File {0} doesn't exist", path));
 43			}
 44			this._path = path;
 45		}
 46
 47		protected override void OnLoad()
 48		{
 49			XmlDocument xmlDocument = new XmlDocument();
 50			xmlDocument.Load(_path);
 51			if (xmlDocument.DocumentElement.Name != "Dictionary")
 52			{
 53				throw new XmlException("Invalid root element. Must be Dictionary");
 54			}
 55			XmlAttribute englishNameAttribute = xmlDocument.DocumentElement.Attributes["EnglishName"];
 56			if (englishNameAttribute != null)
 57			{
 58				_englishName = englishNameAttribute.Value;
 59			}
 60			XmlAttribute cultureNameAttribute = xmlDocument.DocumentElement.Attributes["CultureName"];
 61			if (cultureNameAttribute != null)
 62			{
 63				_cultureName = cultureNameAttribute.Value;
 64			}
 65			foreach (XmlNode node in xmlDocument.DocumentElement.ChildNodes)
 66			{
 67				if (node.Name == "Value")
 68				{
 69					Dictionary<string, string> innerData = new Dictionary<string, string>();
 70					foreach (XmlAttribute attribute in node.Attributes)
 71					{
 72						if (attribute.Name == "Id")
 73						{
 74							if (!_data.ContainsKey(attribute.Value))
 75							{
 76								_data[attribute.Value] = innerData;
 77							}
 78						}
 79						else
 80						{
 81							innerData[attribute.Name] = attribute.Value;
 82						}
 83					}
 84				}
 85			}
 86		}
 87
 88		protected override void OnUnload()
 89		{
 90			_data.Clear();
 91		}
 92
 93		protected override object OnTranslate(string uid, string vid, object defaultValue, Type type)
 94		{
 95			if (string.IsNullOrEmpty(uid))
 96			{
 97				#region Trace
 98				Debug.WriteLine(string.Format("Uid must not be null or empty"));
 99				#endregion
100				return defaultValue;
101			}
102			if (string.IsNullOrEmpty(vid))
103			{
104				#region Trace
105				Debug.WriteLine(string.Format("Vid must not be null or empty"));
106				#endregion
107				return defaultValue;
108			}
109			if (!_data.ContainsKey(uid))
110			{
111				#region Trace
112				Debug.WriteLine(string.Format("Uid {0} was not found in the {1} dictionary", uid, EnglishName));
113				#endregion
114				return defaultValue;
115			}
116			Dictionary<string, string> innerData = _data[uid];
117
118			if (!innerData.ContainsKey(vid))
119			{
120				#region Trace
121				Debug.WriteLine(string.Format("Vid {0} was not found for Uid {1}, in the {2} dictionary", vid, uid, EnglishName));
122				#endregion
123				return defaultValue;
124			}
125			string textValue = innerData[vid];
126			try
127			{
128				if (type == typeof(object))
129				{
130					return textValue;
131				}
132				else
133				{
134					TypeConverter typeConverter = TypeDescriptor.GetConverter(type);
135					object translation = typeConverter.ConvertFromString(textValue);
136					return translation;
137				}						
138			}
139			catch (Exception ex)
140			{
141				#region Trace
142				Debug.WriteLine(string.Format("Failed to translate text {0} in dictionary {1}:\n{2}", textValue, EnglishName, ex.Message));
143				#endregion
144				return null;
145			}			
146		}		
147	}
148}