/// <summary>
/// Tries to get an instance of a custom property field provided by an implementation of <see cref="ICustomPropertyField{T}"/>.
/// </summary>
/// <param name="propertyType">The type for which to get the custom property field.</param>
/// <param name="customPropertyField">On exit, the custom property field instance.</param>
/// <returns>True if a custom property field was found, false otherwise.</returns>
protected static bool TryGetCustomPropertyField(Type propertyType, out ICustomPropertyField customPropertyField)
{
if (s_CustomPropertyFields == null)
{
s_CustomPropertyFields = new Dictionary <Type, Type>();
var customPropertyDrawerTypes = TypeCache.GetTypesDerivedFrom <ICustomPropertyField>();
foreach (var customPropertyDrawerType in customPropertyDrawerTypes)
{
// We only want non-generic non-abstract types that derive from a generic type.
if (customPropertyDrawerType.IsGenericType ||
customPropertyDrawerType.IsAbstract ||
customPropertyDrawerType.BaseType == null ||
customPropertyDrawerType.BaseType.GenericTypeArguments.Length == 0)
{
continue;
}
var typeParam = customPropertyDrawerType.BaseType.GenericTypeArguments[0];
s_CustomPropertyFields.Add(typeParam, customPropertyDrawerType);
}
}
if (s_CustomPropertyFields.TryGetValue(propertyType, out var propertyDrawerType))
{
customPropertyField = Activator.CreateInstance(propertyDrawerType) as ICustomPropertyField;
return(true);
}
customPropertyField = null;
return(false);
}
/// <summary>
/// Tries to get an instance of a custom property field provided by an implementation of <see cref="ICustomPropertyField{T}"/>.
/// </summary>
/// <param name="customPropertyField">On exit, the custom property field instance.</param>
/// <typeparam name="T">The type for which to get the custom property field.</typeparam>
/// <returns>True if a custom property field was found, false otherwise.</returns>
protected static bool TryGetCustomPropertyField <T>(out ICustomPropertyField <T> customPropertyField)
{
if (TryGetCustomPropertyField(typeof(T), out var customPropertyDrawerNonTyped))
{
customPropertyField = customPropertyDrawerNonTyped as ICustomPropertyField <T>;
return(true);
}
customPropertyField = null;
return(false);
}
