Mercurial > repos > IBBoard
annotate Lang/Translation.cs @ 111:9832caa89140
* Make the SimpleSet a proper collection
| author | IBBoard <dev@ibboard.co.uk> |
|---|---|
| date | Sat, 28 Jan 2012 16:52:48 +0000 |
| parents | 13f0ffb012cb |
| children | e32b5ccda410 |
| rev | line source |
|---|---|
| 16 | 1 // This file (Translation.cs) is a part of the IBBoard library and is copyright 2009 IBBoard. |
| 2 // | |
| 3 // The file and the library/program it is in are licensed under the GNU LGPL license, either version 3 of the License or (at your option) any later version. Please see COPYING.LGPL for more information and the full license. | |
| 4 | |
| 37 | 5 using System; |
| 6 using System.IO; | |
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7 using System.Xml; |
| 37 | 8 using System.Xml.Schema; |
| 9 using System.Collections.Generic; | |
| 10 using System.Reflection; | |
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11 using System.ComponentModel; |
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12 using IBBoard.IO; |
| 37 | 13 using IBBoard.Logging; |
| 14 using IBBoard.Xml; | |
| 15 | |
| 16 namespace IBBoard.Lang | |
| 17 { | |
| 18 /// <summary> | |
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19 /// A basic string translator that a specified language and returns translated strings that correspond to translation IDs. |
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20 /// If the string doesn't exist in the specified language then the translator falls back defined 'super' languages. |
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21 /// If the translation doesn't exist in the hierarchy of languages then either a supplied value, null or a "no validation available" |
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22 /// message is returned, depending on the parameters supplied to the method. |
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23 /// |
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24 /// Loaded languages are referenced by two-character language code (e.g. "en" or "it") |
| 37 | 25 /// </summary> |
| 26 public class Translation | |
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27 { |
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28 private static AbstractTranslationSet currentTranslations; |
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29 private static Dictionary<string, AbstractTranslationSet> langToTranslationMap; |
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30 public static event MethodInvoker TranslationChanged; |
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31 |
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32 static Translation() |
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33 { |
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34 langToTranslationMap = new Dictionary<string, AbstractTranslationSet>(); |
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35 } |
| 6 | 36 |
| 37 /// <summary> | |
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38 /// Initialises the translations and loads the specified language so that the Translation class can be used. |
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39 /// Throws a TranslationLoadException if a problem occurred while loading translations. If this occurs then the translation methods can |
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40 /// still be called but no translation will be performed. |
| 6 | 41 /// </summary> |
| 42 /// <param name="appPath"> | |
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43 /// The full path that the contains the "translations" folder - normally the application directory path. |
| 6 | 44 /// </param> |
| 45 /// <param name="language"> | |
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46 /// The language to use as the loaded language |
| 37 | 47 /// </param> |
| 48 public static void InitialiseTranslations(string appPath, string language) | |
| 6 | 49 { |
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50 InitialiseTranslations(appPath); |
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51 LoadTranslation(language); |
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52 } |
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53 |
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54 /// <summary> |
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55 /// Initialises the translation class for an application or source. |
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56 /// </summary> |
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57 /// <param name="appPath"> |
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58 /// The full path that the contains the "translations" folder - normally the application directory path. |
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59 /// </param> |
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60 public static void InitialiseTranslations(string appPath) |
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61 { |
| 6 | 62 InitialiseDefaults(appPath); |
| 63 } | |
| 64 | |
| 65 private static void InitialiseDefaults(string appPath) | |
| 66 { | |
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67 Reset(); |
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68 LoadTranslations(appPath); |
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69 } |
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70 |
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71 private static void LoadTranslations(string appPath) |
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72 { |
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73 DirectoryInfo dir = new DirectoryInfo(Path.Combine(appPath, "translations")); |
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74 |
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75 if (!dir.Exists) |
| 6 | 76 { |
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77 throw new TranslationLoadException("Translation path not found (" + dir.FullName + ")"); |
| 37 | 78 } |
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79 |
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80 TranslationXmlLoader loader = new TranslationXmlLoader(Path.Combine(appPath, "schemas/translation.xsd")); |
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81 |
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82 foreach (FileInfo file in dir.GetFiles("*.translation")) |
| 37 | 83 { |
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84 AbstractTranslationSet translations = loader.LoadTranslations(file.FullName); |
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85 AddTranslationSet(translations); |
| 6 | 86 } |
| 87 } | |
| 88 | |
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89 /// <summary> |
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90 /// Adds the supplied translation set to the list of available translations |
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91 /// </summary> |
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92 /// <param name="translations"> |
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93 /// The translation set to add |
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94 /// </param> |
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95 public static void AddTranslationSet(AbstractTranslationSet translations) |
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96 { |
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97 langToTranslationMap[translations.LanguageCode] = translations; |
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98 } |
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99 |
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100 /// <summary> |
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101 /// Resets the loaded translations and reverts to no translations. |
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102 /// </summary> |
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103 public static void Reset() |
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104 { |
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105 SetCurrentTranslations(null); |
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106 langToTranslationMap.Clear(); |
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107 } |
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108 |
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109 private static void SetCurrentTranslations(AbstractTranslationSet newTranslations) |
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110 { |
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111 if (currentTranslations != newTranslations || (currentTranslations != null && !currentTranslations.Equals(newTranslations))) |
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112 { |
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113 currentTranslations = newTranslations; |
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114 |
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115 if (TranslationChanged != null) |
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116 { |
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117 TranslationChanged(); |
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118 } |
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119 } |
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120 } |
| 6 | 121 |
| 122 /// <summary> | |
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123 /// Loads translations for a given language and sets them as the current language. |
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124 /// Throws a TranslationLoadException if a problem occurred while loading translations. If this occurs then the translation methods can |
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125 /// still be called but all translations will fall back to the default translation. |
| 6 | 126 /// </summary> |
| 127 /// <param name="translationLang"> | |
| 128 /// The new local language to load | |
| 37 | 129 /// </param> |
| 130 public static void LoadTranslation(string translationLanguage) | |
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131 { |
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132 if (HasLanguage(translationLanguage)) |
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133 { |
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134 SetCurrentTranslations(GetTranslationSet(translationLanguage)); |
| 37 | 135 } |
| 136 } | |
| 6 | 137 |
| 138 /// <summary> | |
| 139 /// Gets a translation for a given ID, falling back to a "missing translation" message if none can be found. Also optionally replaces any placeholders with the supplied values. | |
| 140 /// </summary> | |
| 141 /// <param name="translationID"> | |
| 142 /// The ID to look up the translation for | |
| 143 /// </param> | |
| 144 /// <param name="replacements"> | |
| 145 /// A collection of <see cref="System.Object"/>s to replace placeholders with | |
| 146 /// </param> | |
| 147 /// <returns> | |
| 148 /// The translation with the placeholders replaced or a "missing translation" message | |
| 37 | 149 /// </returns> |
| 150 public static string GetTranslation(string translationID, params object[] replacements) | |
| 151 { | |
| 152 return GetTranslation(translationID, false, replacements); | |
| 153 } | |
| 6 | 154 |
| 155 /// <summary> | |
| 156 /// Gets a translation for a given ID, falling back to null or a warning message if a translation cannot be found. Also optionally replaces any placeholders with the supplied values. | |
| 157 /// </summary> | |
| 158 /// <param name="translationID"> | |
| 159 /// The ID to look up the translation for | |
| 160 /// </param> | |
| 161 /// <param name="returnNullOnFail"> | |
| 162 /// TRUE if null should be returned when no translation can be found, or FALSE if a "missing translation" message should be returned | |
| 163 /// </param> | |
| 164 /// <param name="replacements"> | |
| 165 /// A collection of <see cref="System.Object"/>s to replace placeholders with | |
| 166 /// </param> | |
| 167 /// <returns> | |
| 168 /// The translation with the placeholders replaced, or a "missing translation" message or null depending on <param name="returnNullOnFail"> | |
| 37 | 169 /// </returns> |
| 170 public static string GetTranslation(string translationID, bool returnNullOnFail, params object[] replacements) | |
| 171 { | |
| 172 return GetTranslation(translationID, returnNullOnFail ? null : "", replacements); | |
| 173 } | |
| 6 | 174 |
| 175 /// <summary> | |
| 176 /// Gets a translation for a given ID, falling back to a supplied default if a translation cannot be found. Also optionally replaces any placeholders with the supplied values. | |
| 177 /// </summary> | |
| 178 /// <param name="translationID"> | |
| 179 /// The ID to look up the translation for | |
| 180 /// </param> | |
| 181 /// <param name="defaultTranslation"> | |
| 182 /// The string to return if no translation can be found. Can be null or any string. | |
| 183 /// </param> | |
| 184 /// <param name="replacements"> | |
| 185 /// A collection of <see cref="System.Object"/>s to replace placeholders with | |
| 186 /// </param> | |
| 187 /// <returns> | |
| 188 /// The translation, if one exists, or the supplied default with the placeholders replaced | |
| 37 | 189 /// </returns> |
| 190 public static string GetTranslation(string translationID, string defaultTranslation, params object[] replacements) | |
| 191 { | |
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192 string trans = GetTranslationFromTranslationSet(translationID); |
| 37 | 193 |
| 194 if (trans == null) | |
| 195 { | |
| 196 trans = GetDefaultTranslation(translationID, defaultTranslation); | |
| 197 } | |
| 198 | |
| 199 trans = AddVariablesToTranslation(trans, replacements); | |
| 200 | |
| 201 return trans; | |
| 6 | 202 } |
| 203 | |
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204 private static string GetTranslationFromTranslationSet(string translationID) |
| 6 | 205 { |
| 206 string translation = null; | |
| 207 | |
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208 if (currentTranslations!=null) |
| 37 | 209 { |
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210 translation = currentTranslations[translationID]; |
| 6 | 211 } |
| 212 | |
| 213 return translation; | |
| 214 } | |
| 215 | |
| 216 private static string GetDefaultTranslation(string translationID, string defaultTranslation) | |
| 217 { | |
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218 return (defaultTranslation != "" || defaultTranslation == null) ? defaultTranslation : GetMissingTranslationMessage(translationID); |
| 37 | 219 } |
| 6 | 220 |
| 221 private static string GetMissingTranslationMessage(string translationID) | |
| 222 { | |
| 223 return "++ Missing Translation "+translationID+" ++"; | |
| 224 } | |
| 225 | |
| 226 private static string AddVariablesToTranslation(string translation, object[] replacements) | |
| 227 { | |
| 37 | 228 if (translation != null && replacements != null && replacements.Length > 0) |
| 229 { | |
| 230 translation = String.Format(translation, replacements); | |
| 6 | 231 } |
| 232 | |
| 233 return translation; | |
| 234 } | |
| 235 | |
| 236 /// <summary> | |
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237 /// Translate an <see cref="ITranslatable"/> item, with optional string replacement. If the translation |
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238 /// does not exist then a warning message will be used as the translated text. |
| 6 | 239 /// </summary> |
| 240 /// <param name="item"> | |
| 241 /// A <see cref="ITranslatable"/> to set the text for | |
| 242 /// </param> | |
| 243 /// <param name="replacements"> | |
| 244 /// A collection of <see cref="System.Object"/>s that will be used to fill place-holders | |
| 37 | 245 /// </param> |
| 246 public static void Translate(ITranslatable item, params object[] replacements) | |
| 247 { | |
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248 Translate(item, GetMissingTranslationMessage(item.Name), replacements); |
| 37 | 249 } |
| 250 | |
| 251 /// <summary> | |
| 252 /// Translate an <see cref="ITranslatable"/> item, with optional string replacement. The <code>defaultText</code> | |
| 253 /// can be used to specify an alternate translation. Passing <code>null</code> will result in a warning message | |
| 254 /// about a missing translation ID. | |
| 255 /// </summary> | |
| 256 /// <param name="item"> | |
| 257 /// A <see cref="ITranslatable"/> to set the text for | |
| 258 /// </param> | |
| 259 /// <param name="defaultText"> | |
| 260 /// The default string to display if no translation could be found. | |
| 261 /// </param> | |
| 262 /// <param name="replacements"> | |
| 263 /// A collection of <see cref="System.Object"/>s that will be used to fill place-holders | |
| 264 /// </param> | |
| 265 public static void Translate(ITranslatable item, string defaultText, params object[] replacements) | |
| 266 { | |
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267 if (item.Text == "") |
| 37 | 268 { |
| 269 //it doesn't need translating - either there is no text from the developer or it's a hyphen for a divider | |
| 270 return; | |
| 271 } | |
| 272 | |
| 273 item.Text = GetTranslation(item.Name, defaultText, replacements); | |
| 6 | 274 } |
| 275 | |
| 276 /// <summary> | |
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277 /// Get the current local translation language. This is the "language code" used by the translation and should match the ISO code for the language. |
| 6 | 278 /// </summary> |
| 279 /// <returns> | |
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280 /// The string used as the language code of the current local translation |
| 6 | 281 /// </returns> |
| 282 public static string GetTranslationLanguage() | |
| 283 { | |
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284 return (currentTranslations != null ? currentTranslations.LanguageCode : ""); |
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285 } |
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286 |
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287 public static ICollection<TranslationLanguage> GetLanguages() |
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288 { |
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289 ICollection<TranslationLanguage> langs = new List<TranslationLanguage>(); |
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290 |
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291 foreach (AbstractTranslationSet translations in langToTranslationMap.Values) |
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292 { |
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293 langs.Add(translations.Language); |
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294 } |
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295 |
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296 return langs; |
| 37 | 297 } |
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298 |
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299 public static AbstractTranslationSet GetTranslationSet(string translationLanguage) |
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300 { |
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301 AbstractTranslationSet translations = null; |
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302 |
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303 if (translationLanguage != null) |
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304 { |
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305 translations = DictionaryUtils.GetValue(langToTranslationMap, translationLanguage); |
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306 |
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307 if (translations == null) |
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308 { |
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309 translations = new ModifiableTranslationSet(translationLanguage); |
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310 } |
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311 } |
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312 |
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313 return translations; |
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314 } |
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315 |
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316 public static bool HasLanguage(string languageCode) |
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317 { |
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318 return langToTranslationMap.ContainsKey(languageCode); |
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319 } |
| 37 | 320 } |
| 321 } |