private static Type GetExtensionType(INuPatternProjectTypeProvider provider, IEnumerable <Lazy <TComponents, IComponentMetadata> > components, string extensionName)
{
if (string.IsNullOrEmpty(extensionName))
{
return(null);
}
// Locate type from exports first
var extensionType = components.FromComponentCatalog()
.Where(binding => binding.Metadata.Id == extensionName)
.Select(binding => binding.Metadata.ExportingType)
.FirstOrDefault();
if (extensionType == null)
{
if (provider == null)
{
return(null);
}
// Locate type in solution assemblies
extensionType = (from type in provider.GetTypes <TComponents>()
let meta = type.AsProjectComponent()
where meta != null && meta.Id == extensionName
select type)
.FirstOrDefault();
}
return(extensionType);
}
/// <summary>
/// Returns a collection of standard values for the data type this type converter is designed for when provided with a format context.
/// </summary>
/// <param name="context">An <see cref="ITypeDescriptorContext"/> that provides a format context that can be used to extract additional information about the environment from which this converter is invoked. This parameter or properties of this parameter can be null.</param>
/// <returns>
/// A <see cref="TypeConverter.StandardValuesCollection"/> that holds a standard set of valid values, or null if the data type does not support a standard set of values.
/// </returns>
public override TypeConverter.StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
{
if (ProjectTypeProvider == null || ValueProviders == null)
{
ProjectTypeProvider = NuPatternCompositionService.Instance.GetExportedValue <INuPatternProjectTypeProvider>();
ValueProviders = NuPatternCompositionService.Instance
.GetExports <IValueProvider, IComponentMetadata>()
.FromComponentCatalog()
.Where(value => value.Metadata.ExportingType.IsBrowsable());
}
return(this.StandardValues);
}
public static IEnumerable <PropertyDescriptor> GetComponentProperties(INuPatternProjectTypeProvider provider, IEnumerable <Lazy <TComponents, IComponentMetadata> > components, string extensionName)
{
Guard.NotNull(() => provider, provider);
Guard.NotNull(() => components, components);
var properties = new List <PropertyDescriptor>();
if (!String.IsNullOrEmpty(extensionName))
{
// Find the extension type.
var extensionType = GetExtensionType(provider, components, extensionName);
if (extensionType != null)
{
// Project descriptors from component onto the current instance.
var descriptors = TypeDescriptor.GetProperties(extensionType)
.Cast <PropertyDescriptor>()
.Where(d => d.IsBindableDesignProperty());
foreach (var descriptor in descriptors)
{
// Determine if a collection design property
if (descriptor.IsAutoDesignCollectionProperty())
{
properties.Add(new DesignCollectionPropertyDescriptor <TInstance>(descriptor));
}
else
{
// Determine if a [DesignOnly(true)] property
if (descriptor.IsDesignOnlyProperty())
{
properties.Add(new DesignOnlyPropertyDescriptor(descriptor));
}
else
{
// Regular design property
properties.Add(new DesignPropertyDescriptor(
descriptor.Name,
descriptor.PropertyType,
typeof(TInstance),
descriptor.Attributes.Cast <Attribute>().ToArray()));
}
}
}
}
}
return(properties);
}
/// <summary>
/// Returns a collection of standard values for the data type this type converter is designed for when provided with a format context.
/// </summary>
/// <param name="context">An <see cref="ITypeDescriptorContext"/> that provides a format context that can be used to extract additional information about the environment from which this converter is invoked. This parameter or properties of this parameter can be null.</param>
/// <returns>
/// A <see cref="TypeConverter.StandardValuesCollection"/> that holds a standard set of valid values, or null if the data type does not support a standard set of values.
/// </returns>
public override TypeConverter.StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
{
if (ProjectTypeProvider == null || ValueProviders == null)
{
ProjectTypeProvider = NuPatternCompositionService.Instance.GetExportedValue<INuPatternProjectTypeProvider>();
ValueProviders = NuPatternCompositionService.Instance
.GetExports<IValueProvider, IComponentMetadata>()
.FromComponentCatalog()
.Where(value => value.Metadata.ExportingType.IsBrowsable());
}
return this.StandardValues;
}
