/// <summary>Uses a standard <see cref="ResourceManager"/> object to obtain translations.</summary>
/// <param name="manager">A ResourceManager that provides access to resources (resx embedded in an assembly)</param>
/// <param name="culture">A value of <see cref="CultureInfo"/> that
/// represents the language to look up in the ResourceManager. If this is
/// null, the ResourceManager will use CultureInfo.CurrentUICulture.</param>
/// <param name="resxNameCalculator">An optional function that will be
/// called when a translation is requested without providing a resource
/// key symbol. For example, if someone writes <c>"Save as...".Localized()</c>
/// using the <see cref="Localized(string)"/> extension method, this
/// function is called on the string "Save as...". This function could
/// be used to compute a resource name such as "strSaveAs" automatically,
/// according to whatever naming convention is used in your resource file.
/// </param>
/// <param name="fallbackToPrevious">If a translation was not found in the
/// specified ResourceManager and this parameter is true, the previously-
/// installed <see cref="Localizer"/> is called instead. Otherwise, the
/// dummy translator <see cref="Passthru"/> is used.</param>
/// <returns></returns>
public static SavedValue <LocalizerDelegate> UseResourceManager(ResourceManager manager,
CultureInfo culture = null, Func <string, string> resxNameCalculator = null, bool fallbackToPrevious = true)
{
CheckParam.IsNotNull("manager", manager);
LocalizerDelegate fallback = (fallbackToPrevious ? Localizer : null) ?? Passthru;
return(SetLocalizer((Symbol resourceId, string defaultMessage) =>
{
string id;
if (resourceId != null)
{
id = resourceId.Name;
}
else
{
id = (resxNameCalculator != null ? resxNameCalculator(defaultMessage) : null) ?? defaultMessage;
}
var translation = manager.GetString(id, culture);
if (translation != null)
{
return translation;
}
else
{
return fallback(resourceId, defaultMessage);
}
}));
}
/// <summary>Sets the localizer method.</summary>
/// <remarks><see cref="Localizer"/> is a thread-local value, but since
/// .NET does not support inheritance of thread-local values, this method
/// also sets the global default used by threads on which this method was
/// never called.
/// <para/>
/// This property follows the Ambient Service Pattern:
/// http://core.loyc.net/essentials/ambient-service-pattern.html
/// </remarks>
public static SavedValue<LocalizerDelegate> SetLocalizer(LocalizerDelegate newValue)
{
return new SavedValue<LocalizerDelegate>(_localizer, newValue ?? Passthru);
}
/// <summary>Sets the localizer method.</summary>
/// <remarks><see cref="Localizer"/> is a thread-local value, but since
/// .NET does not support inheritance of thread-local values, this method
/// also sets the global default used by threads on which this method was
/// never called.
/// <para/>
/// This property follows the Ambient Service Pattern:
/// http://core.loyc.net/essentials/ambient-service-pattern.html
/// </remarks>
public static SavedValue <LocalizerDelegate> SetLocalizer(LocalizerDelegate newValue)
{
return(new SavedValue <LocalizerDelegate>(_localizer, newValue ?? Passthru));
}
/// <summary>
/// Traverse the input object recursively and execute the localizer method on all properties of type DateTime. All elements of arrays and collections that implement an 'int'
/// indexer will be examined.
/// </summary>
/// <param name="obj">Object to traverse</param>
/// <param name="localizer">Method to perform the localization on the DateTime properties</param>
/// <returns>Traversed object</returns>
public object TraverseObject(object obj, LocalizerDelegate localizer)
{
if (null == obj)
{
return null;
}
var objectType = obj.GetType();
if (typeof (DateTime) == objectType)
{
return localizer((DateTime) obj);
}
if (objectType.IsArray)
{
var array = (Array) obj;
for (int i = 0; i < array.Length; i++)
{
var element = array.GetValue(i);
var localizedObject = this.TraverseObject(element, localizer);
array.SetValue(localizedObject, i);
}
return obj;
}
if (objectType.HasIndexer<int>())
{
var listType = objectType.GetGenericArguments()
.FirstOrDefault();
if (null == listType)
{
return obj;
}
try
{
int i = 0;
while (true)
{
var indexer = objectType.GetIndexer<int>();
var indexValue = indexer.GetValue(obj, new object[] { i });
var localizedObject = this.TraverseObject(indexValue, localizer);
indexer.SetValue(obj, localizedObject, new object[] { i });
i++;
}
}
catch (TargetInvocationException ex)
{
if (false == (ex.InnerException is ArgumentOutOfRangeException))
{
throw;
}
// The index of the collection was exceeded and execution can continue traversing the properties.
}
return obj;
}
if (true == objectType.IsSerializable)
{
return obj;
}
var properties = objectType.GetProperties();
foreach (var prop in properties)
{
if ((false == prop.CanWrite) || (null != prop.GetCustomAttribute<LocalizerIgnoreAttribute>()))
{
continue;
}
var value = prop.GetValue(obj, null);
if (value == null)
{
continue;
}
var localizedObject = this.TraverseObject(value, localizer);
prop.SetValue(obj, localizedObject, null);
}
return obj;
}
