Mercurial > repos > IBBoard
annotate Preferences.cs @ 6:f269d8bcc152
Re #2 - Refactor API
* Refactor translations in to smaller and clearer functions
* Add "get current translation language" function
* Add documentation of public methods
author | IBBoard <dev@ibboard.co.uk> |
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date | Sat, 27 Dec 2008 20:28:04 +0000 |
parents | 961030992bd2 |
children | 0352fa33ee8f |
rev | line source |
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1 using System; |
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2 using System.Collections; |
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3 using System.IO; |
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4 using System.Xml; |
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5 using System.Reflection; |
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6 using IBBoard.IO; |
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7 |
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8 //TODO: Add import/export |
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9 namespace IBBoard |
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10 { |
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11 /// <summary> |
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12 /// Summary description for Preferences. |
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13 /// </summary> |
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14 public class Preferences |
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15 { |
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16 private static Type stringType = typeof(string); |
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17 private static Type hashtableType = typeof(Hashtable); |
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18 private Hashtable htGlobal; |
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19 private Hashtable htLocal; |
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20 |
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21 private string app; |
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22 private bool modified = false; |
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23 |
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24 |
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25 public Preferences(string appName) |
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26 { |
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27 app = appName; |
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28 LoadPreferences(); |
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29 } |
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30 |
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31 /*public Preferences(string appExecPath, string appName, string fullUserDataDir) |
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32 { |
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33 LoadPreferences(appExecPath.TrimEnd(Constants.DirectoryChar) + Constants.DirectoryChar + appName + "Pref.xml", fullUserDataDir.TrimEnd(Constants.DirectoryChar)); |
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34 } |
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35 |
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36 public Preferences(string filepath, string appDir) |
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37 { |
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38 LoadPreferences(filepath, appDir); |
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39 }*/ |
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40 |
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41 private void LoadPreferences() |
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42 { |
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43 htGlobal = new Hashtable(); |
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44 htLocal = new Hashtable(); |
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45 |
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46 string globalPath = Constants.ExecutablePath + Constants.DirectoryChar + app + "Pref.xml"; |
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47 |
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48 if (File.Exists(globalPath)) |
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49 { |
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50 XmlDocument xmld = new XmlDocument(); |
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51 xmld.Load(globalPath); |
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52 XmlNodeList nl = xmld.LastChild.ChildNodes; |
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53 XmlNodeList nlHash; |
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54 MethodInfo m; |
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55 Type t; |
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56 Hashtable htTemp; |
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57 |
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58 if (nl == null || nl.Count==0) |
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59 { |
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60 throw new InvalidFileException("Preference file "+globalPath+" did not contain any preferences"); |
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61 } |
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62 |
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63 for (int i = 0; i<nl.Count; i++) |
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64 { |
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65 t = Type.GetType(nl[i].Attributes["type"].Value, true); |
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66 |
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67 if (t!=stringType) |
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68 { |
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69 if (t==hashtableType) |
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70 { |
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71 htTemp = new Hashtable(); |
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72 nlHash = nl[i].ChildNodes; |
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73 |
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74 for (int j = 0; j<nlHash.Count; j++) |
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75 { |
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76 if (nlHash[j].NodeType.GetType()==typeof(XmlElement)) |
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77 { |
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78 t = Type.GetType(nlHash[j].Attributes["type"].Value, true); |
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79 m = t.GetMethod("Parse", new Type[]{stringType}); |
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80 htTemp[nlHash[j].Attributes["key"].Value] = m.Invoke(null, new object[]{nlHash[j].InnerText}); |
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81 } |
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82 } |
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83 |
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84 htGlobal[nl[i].Attributes["id"].Value] = htTemp; |
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85 } |
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86 else if (t.IsEnum) |
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87 { |
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88 htGlobal[nl[i].Attributes["id"].Value] = Enum.Parse(t, nl[i].InnerText, true); |
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89 } |
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90 else |
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91 { |
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92 m = t.GetMethod("Parse", new Type[]{stringType}); |
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93 htGlobal[nl[i].Attributes["id"].Value] = m.Invoke(null, new object[]{nl[i].InnerText}); |
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94 } |
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95 } |
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96 else |
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97 { |
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98 htGlobal[nl[i].Attributes["id"].Value] = nl[i].InnerText; |
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99 } |
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100 } |
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101 |
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102 LoadLocalPreferences(); |
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103 } |
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104 else |
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105 { |
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106 throw new FileNotFoundException("Could not find default preferences at "+globalPath); |
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107 } |
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108 } |
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109 |
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110 private void LoadLocalPreferences() |
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111 { |
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112 string path = Constants.UserDataPath + Constants.DirectoryString + "preferences.xml"; |
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113 |
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114 if (File.Exists(path)) |
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115 { |
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116 XmlDocument xmld = new XmlDocument(); |
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117 xmld.Load(path); |
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118 XmlNodeList nl = xmld.LastChild.ChildNodes; |
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119 XmlNodeList nlHash; |
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120 MethodInfo m; |
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121 Type t; |
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122 Hashtable htTemp = new Hashtable(); |
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123 |
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124 nl = xmld.LastChild.ChildNodes; |
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125 |
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126 for (int i = 0; i<nl.Count; i++) |
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127 { |
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128 if (!htGlobal.ContainsKey(nl[i].Attributes["id"].Value)) |
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129 { |
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130 throw new InvalidFileException("User preferences file contains a value for key \""+nl[i].Attributes["id"].Value+"\" which is not contained in the main preferences"); |
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131 } |
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132 |
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133 t = Type.GetType(nl[i].Attributes["type"].Value, true); |
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134 if (t!=stringType) |
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135 { |
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136 if (t==hashtableType) |
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137 { |
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138 htTemp = new Hashtable(); |
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139 nlHash = nl[i].ChildNodes; |
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140 Hashtable htTempInner = new Hashtable(); |
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141 |
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142 for (int j = 0; j<nlHash.Count; j++) |
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143 { |
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144 if (nlHash[j].NodeType==XmlNodeType.Element) |
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145 { |
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146 t = Type.GetType(nlHash[j].Attributes["type"].Value, true); |
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147 m = t.GetMethod("Parse", new Type[]{stringType}); |
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148 htTempInner[nlHash[j].Attributes["key"].Value] = m.Invoke(null, new object[]{nlHash[j].InnerText}); |
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149 } |
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150 } |
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151 |
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152 htTemp[nl[i].Attributes["id"].Value] = htTempInner; |
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153 } |
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154 else if (t.IsEnum) |
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155 { |
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156 htTemp[nl[i].Attributes["id"].Value] = Enum.Parse(t, nl[i].InnerText, true); |
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157 } |
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158 else |
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159 { |
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160 m = t.GetMethod("Parse", new Type[]{stringType}); |
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161 |
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162 if (m!=null) |
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163 { |
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164 htTemp[nl[i].Attributes["id"].Value] = m.Invoke(null, new object[]{nl[i].InnerText}); |
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165 } |
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166 } |
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167 } |
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168 else |
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169 { |
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170 htTemp[nl[i].Attributes["id"].Value] = nl[i].InnerText; |
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171 } |
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172 } |
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173 |
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174 htLocal = htTemp; |
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175 } |
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176 } |
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177 |
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178 public void ReloadPreferences() |
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179 { |
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180 htLocal.Clear(); |
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181 LoadLocalPreferences(); |
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182 } |
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183 |
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184 public object this[string key] |
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185 { |
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186 get { return this[key, true]; } |
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187 |
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188 set |
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189 { |
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190 if (!htGlobal.ContainsKey(key)) |
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191 { |
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192 throw new InvalidOperationException("Preference must already exist in the Global Preferences"); |
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193 } |
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194 |
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195 if (htGlobal[key].GetType()!=value.GetType()) |
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196 { |
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197 throw new InvalidOperationException("Preferences must be set with an object of the same type as the existing preference"); |
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198 } |
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199 |
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200 if (value is Hashtable) |
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201 { |
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202 throw new InvalidOperationException("Hashtables in Preferences cannot be set, they can only be added to or removed from."); |
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203 } |
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204 |
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205 if (htGlobal[key].Equals(value)) |
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206 { |
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207 if (htLocal.ContainsKey(key)) |
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208 { |
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209 htLocal.Remove(key); |
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210 modified = true; |
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211 } |
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212 } |
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213 else if (!((htLocal[key]==null && value==null) || value.Equals(htLocal[key]))) |
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214 { |
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215 htLocal[key] = value; |
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216 modified = true; |
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217 } |
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218 //else nothing actually needs modifying |
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219 } |
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220 } |
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221 |
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222 public object this[string key, bool errorOnNoVal] |
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223 { |
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224 get |
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225 { |
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226 if (htLocal.ContainsKey(key)) |
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227 { |
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228 return htLocal[key]; |
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229 } |
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230 else if (htGlobal.ContainsKey(key)) |
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231 { |
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232 if (htGlobal[key] is Hashtable) |
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233 { |
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234 htLocal[key] = ((Hashtable)htGlobal[key]).Clone(); |
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235 return htLocal[key]; |
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236 } |
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237 else |
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238 { |
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239 return htGlobal[key]; |
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240 } |
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241 } |
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242 else if (errorOnNoVal) |
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243 { |
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244 throw new InvalidOperationException("Key \""+key+"\" was not associated with a preference value"); |
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245 } |
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246 |
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247 return null; |
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248 } |
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249 } |
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250 |
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251 public bool GetBooleanProperty(string key) |
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252 { |
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253 object obj = this[key, false]; |
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254 bool val = false; |
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255 |
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256 if (obj is bool) |
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257 { |
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258 obj = (bool)obj; |
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259 } |
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260 |
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261 return val; |
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262 } |
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263 |
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264 public string GetStringProperty(string key) |
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265 { |
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266 object obj = this[key, false]; |
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267 string str = null; |
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268 |
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269 if (obj is String) |
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270 { |
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271 str = (String)obj; |
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272 } |
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273 |
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274 return str; |
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275 } |
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276 |
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277 //public String |
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278 |
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279 public bool IsModified() |
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280 { |
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281 return modified; |
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282 } |
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283 |
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284 public void Save() |
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285 { |
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286 if (htLocal.Count>0) |
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287 { |
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288 XmlDocument xmld = new XmlDocument(); |
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289 xmld.LoadXml("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>"+ |
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290 "<!DOCTYPE prefs["+ |
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291 "<!ELEMENT preferences (preferece*)> "+ |
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292 "<!ELEMENT preference (CDATA|prefsub)> "+ |
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293 "<!ELEMENT prefsub (CDATA)> "+ |
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294 "<!ATTLIST preference id ID #REQUIRED>"+ |
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295 "<!ATTLIST preference type CDATA #REQUIRED>"+ |
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296 "<!ATTLIST prefsub key CDATA #REQUIRED>"+ |
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297 "<!ATTLIST prefsub type CDATA #REQUIRED>"+ |
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298 "]>"+"<preferences></preferences>"); |
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299 XmlNode xmln = xmld.LastChild; |
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300 XmlNode pref; |
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301 XmlAttribute attr; |
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302 XmlNode prefSub; |
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303 XmlAttribute attrSub; |
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304 object o; |
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305 Hashtable htTemp; |
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306 Hashtable htGlobalTemp; |
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307 |
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308 foreach (string key in htLocal.Keys) |
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309 { |
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310 pref = xmld.CreateNode(XmlNodeType.Element, "preference",""); |
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311 attr = xmld.CreateAttribute("id"); |
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312 attr.Value = key; |
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313 pref.Attributes.Append(attr); |
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314 attr = xmld.CreateAttribute("type"); |
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315 o = htLocal[key]; |
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316 |
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317 attr.Value = o.GetType().AssemblyQualifiedName; |
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318 |
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319 if (o.GetType().ToString() == "System.Collections.Hashtable") |
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320 { |
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321 htTemp = (Hashtable)o; |
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322 htGlobalTemp = (Hashtable)htGlobal[key]; |
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323 |
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324 foreach(object subkey in htTemp.Keys) |
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325 { |
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326 if (!htGlobalTemp.ContainsKey(subkey) || !htGlobalTemp[subkey].Equals(htTemp[subkey])) |
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327 { |
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328 prefSub = xmld.CreateNode(XmlNodeType.Element, "prefsub", ""); |
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329 attrSub = xmld.CreateAttribute("key"); |
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330 attrSub.Value = subkey.ToString(); |
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331 prefSub.Attributes.Append(attrSub); |
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332 attrSub = xmld.CreateAttribute("type"); |
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333 attrSub.Value = htTemp[subkey].GetType().AssemblyQualifiedName; |
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334 prefSub.Attributes.Append(attrSub); |
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335 prefSub.InnerText = htTemp[subkey].ToString(); |
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336 pref.AppendChild(prefSub); |
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337 } |
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338 } |
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339 } |
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340 else |
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341 { |
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342 pref.InnerText = o.ToString(); |
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343 } |
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344 |
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345 pref.Attributes.Append(attr); |
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346 xmln.AppendChild(pref); |
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347 } |
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348 |
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349 if (!Directory.Exists(Constants.UserDataPath)) |
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350 { |
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351 Directory.CreateDirectory(Constants.UserDataPath); |
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352 } |
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353 |
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354 xmld.Save(Constants.UserDataPath + Constants.DirectoryString + "preferences.xml"); |
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355 } |
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356 else if (File.Exists(Constants.UserDataPath + Constants.DirectoryString + "preferences.xml")) |
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357 { |
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358 File.Delete(Constants.UserDataPath + Constants.DirectoryString + "preferences.xml"); |
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359 } |
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360 |
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361 modified = false; |
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362 } |
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363 } |
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364 } |