Update release

Import/GacUI.cpp

@@ -804,6 +804,24 @@ GuiControl
 
 			void GuiControl::OnParentLineChanged()
 			{
+				{
+					GuiControlSignalEventArgs arguments(boundsComposition);
+					arguments.controlSignal = ControlSignal::ParentLineChanged;
+					ControlSignalTrigerred.Execute(arguments);
+				}
+				for(vint i=0;i<children.Count();i++)
+				{
+					children[i]->OnParentLineChanged();
+				}
+			}
+
+			void GuiControl::OnServiceAdded()
+			{
+				{
+					GuiControlSignalEventArgs arguments(boundsComposition);
+					arguments.controlSignal = ControlSignal::ServiceAdded;
+					ControlSignalTrigerred.Execute(arguments);
+				}
 				for(vint i=0;i<children.Count();i++)
 				{
 					children[i]->OnParentLineChanged();
@@ -812,7 +830,9 @@ GuiControl
 
 			void GuiControl::OnRenderTargetChanged(elements::IGuiGraphicsRenderTarget* renderTarget)
 			{
-				RenderTargetChanged.Execute(GetNotifyEventArguments());
+				GuiControlSignalEventArgs arguments(boundsComposition);
+				arguments.controlSignal = ControlSignal::RenderTargetChanged;
+				ControlSignalTrigerred.Execute(arguments);
 			}
 
 			void GuiControl::OnBeforeReleaseGraphicsHost()
@@ -919,7 +939,7 @@ GuiControl
 				{
 					ControlThemeNameChanged.SetAssociatedComposition(boundsComposition);
 					ControlTemplateChanged.SetAssociatedComposition(boundsComposition);
-					RenderTargetChanged.SetAssociatedComposition(boundsComposition);
+					ControlSignalTrigerred.SetAssociatedComposition(boundsComposition);
 					VisibleChanged.SetAssociatedComposition(boundsComposition);
 					EnabledChanged.SetAssociatedComposition(boundsComposition);
 					VisuallyEnabledChanged.SetAssociatedComposition(boundsComposition);
@@ -1261,16 +1281,34 @@ GuiControl
 				}
 				else if (identifier == IGuiAltActionContainer::Identifier)
 				{
-					return 0;
-				}
-				else if(parent)
-				{
-					return parent->QueryService(identifier);
+					return nullptr;
 				}
 				else
 				{
-					return 0;
+					vint index = controlServices.Keys().IndexOf(identifier);
+					if (index != -1)
+					{
+						return controlServices.Values()[index].Obj();
+					}
+
+					if (parent)
+					{
+						return parent->QueryService(identifier);
+					}
 				}
+				return nullptr;
+			}
+
+			bool GuiControl::AddService(const WString& identifier, Ptr<IDescriptable> value)
+			{
+				if (controlServices.Keys().Contains(identifier))
+				{
+					return false;
+				}
+
+				controlServices.Add(identifier, value);
+				OnServiceAdded();
+				return true;
 			}
 
 /***********************************************************************
@@ -22199,7 +22237,7 @@ GuiToolstripCommand
 					{
 						if (auto control = dynamic_cast<GuiControl*>(attachedRootObject))
 						{
-							control->RenderTargetChanged.Detach(renderTargetChangedHandler);
+							control->ControlSignalTrigerred.Detach(renderTargetChangedHandler);
 						}
 						else if (auto composition = dynamic_cast<GuiGraphicsComposition*>(attachedRootObject))
 						{
@@ -22213,7 +22251,11 @@ GuiToolstripCommand
 					{
 						if (auto control = dynamic_cast<GuiControl*>(attachedRootObject))
 						{
-							renderTargetChangedHandler = control->RenderTargetChanged.AttachMethod(this, &GuiToolstripCommand::OnRenderTargetChanged);
+							renderTargetChangedHandler = control->ControlSignalTrigerred.AttachLambda(
+								[=](GuiGraphicsComposition* sender, GuiControlSignalEventArgs& arguments)
+								{
+									OnRenderTargetChanged(sender, arguments);
+								});
 						}
 						else if (auto composition = dynamic_cast<GuiGraphicsComposition*>(attachedRootObject))
 						{
@@ -32239,35 +32281,41 @@ namespace vl
 			tempResource->AddItem(L"Document", tempResourceItem);
 			auto tempResolver = MakePtr<GuiResourcePathResolver>(tempResource, L"");
 
+			internal::ContextFreeReader reader(stream);
 			{
-				vint32_t count = 0;
-				if (stream.Read(&count, sizeof(count)) != sizeof(count)) return nullptr;
-				for (vint i = 0; i < count; i++)
+				WString title;
+				vint32_t version = 0;
+				reader << title << version;
+
+				if (title != L"WCF_Document" || version < 1)
 				{
-					vint32_t size = 0;
-					if (stream.Read(&size, sizeof(size)) != sizeof(size)) return nullptr;
-					if (size > 0)
-					{
-						Array<char> buffer(size);
-						if (stream.Read(&buffer[0], size) != size) return nullptr;
-						if (auto image = GetCurrentController()->ImageService()->CreateImageFromMemory(&buffer[0], buffer.Count()))
-						{
-							auto imageItem = MakePtr<GuiResourceItem>();
-							imageItem->SetContent(L"Image", MakePtr<GuiImageData>(image, 0));
-							tempResource->AddItem(L"Image_" + itow(i), imageItem);
-						}
-					}
+					return nullptr;
 				}
 			}
 
-			StreamReader streamReader(stream);
-			auto text = streamReader.ReadToEnd();
+			WString xmlText;
+			reader << xmlText;
 			List<GuiResourceError> errors;
-
 			auto parser = GetParserManager()->GetParser<XmlDocument>(L"XML");
-			auto xml = parser->Parse({}, text, errors);
+			auto xml = parser->Parse({}, xmlText, errors);
 			if (errors.Count() > 0) return nullptr;
 
+			{
+				vint32_t count = 0;
+				reader << count;
+				for (vint i = 0; i < count; i++)
+				{
+					MemoryStream memoryStream;
+					reader << (IStream&)memoryStream;
+					if (auto image = GetCurrentController()->ImageService()->CreateImageFromStream(memoryStream))
+					{
+						auto imageItem = MakePtr<GuiResourceItem>();
+						imageItem->SetContent(L"Image", MakePtr<GuiImageData>(image, 0));
+						tempResource->AddItem(L"Image_" + itow(i), imageItem);
+					}
+				}
+			}
+
 			auto document = DocumentModel::LoadFromXml(tempResourceItem, xml, tempResolver, errors);
 			return document;
 		}
@@ -32279,29 +32327,42 @@ namespace vl
 			{
 				paragraph->Accept(&visitor);
 			}
+
+			internal::ContextFreeWriter writer(stream);
+			{
+				WString title = L"WCF_Document";
+				vint32_t version = 1;
+				writer << title << version;
+			}
+			{
+				auto xmlText = GenerateToStream([&](StreamWriter& streamWriter)
+				{
+					auto xml = model->SaveToXml();
+					XmlPrint(xml, streamWriter);
+				});
+				writer << xmlText;
+			}
 			{
 				vint32_t count = (vint32_t)visitor.imageRuns.Count();
-				stream.Write(&count, sizeof(count));
+				writer << count;
+
 				FOREACH(Ptr<DocumentImageRun>, imageRun, visitor.imageRuns)
 				{
-					stream::MemoryStream memoryStream;
+					MemoryStream memoryStream;
 					if (imageRun->image)
 					{
-						imageRun->image->SaveToStream(memoryStream);
+						auto format = imageRun->image->GetFormat();
+						if (format == INativeImage::Gif)
+						{
+							format = INativeImage::Png;
+						}
+
+						imageRun->image->SaveToStream(memoryStream, format);
 					}
 					
-					count = (vint32_t)memoryStream.Size();
-					stream.Write(&count, sizeof(count));
-					if (count > 0)
-					{
-						stream.Write(memoryStream.GetInternalBuffer(), count);
-					}
+					writer << (IStream&)memoryStream;
 				}
 			}
-
-			StreamWriter streamWriter(stream);
-			auto xml = model->SaveToXml();
-			XmlPrint(xml, streamWriter);
 		}
 	}
 }
@@ -32440,7 +32501,13 @@ namespace vl
 					if (run->image)
 					{
 						writer.WriteString(L"<img width=\"" + itow(run->size.x) + L"\" height=\"" + itow(run->size.y) + L"\" src=\"data:image/");
-						switch (run->image->GetFormat())
+						auto format = run->image->GetFormat();
+						if (format == INativeImage::Gif)
+						{
+							format = INativeImage::Png;
+						}
+
+						switch (format)
 						{
 						case INativeImage::Bmp: writer.WriteString(L"bmp;base64,"); break;
 						case INativeImage::Gif: writer.WriteString(L"gif;base64,"); break;
@@ -32453,7 +32520,7 @@ namespace vl
 						}
 
 						MemoryStream memoryStream;
-						run->image->SaveToStream(memoryStream);
+						run->image->SaveToStream(memoryStream, format);
 						memoryStream.SeekFromBegin(0);
 						while (true)
 						{

Import/GacUI.h

@@ -3277,11 +3277,42 @@ Predefined Events
 				}
 			};
 
+			/// <summary>Control signal.</summary>
+			enum class ControlSignal
+			{
+				/// <summary>Render target changed.</summary>
+				RenderTargetChanged,
+				/// <summary>Render target changed.</summary>
+				ParentLineChanged,
+				/// <summary>Service added changed.</summary>
+				ServiceAdded,
+			};
+
+			/// <summary>Control signal event arguments.</summary>
+			struct GuiControlSignalEventArgs : public GuiEventArgs, public Description<GuiControlSignalEventArgs>
+			{
+				/// <summary>The event raiser composition.</summary>
+				ControlSignal				controlSignal = ControlSignal::ParentLineChanged;
+
+				/// <summary>Create an event arguments with <see cref="compositionSource"/> and <see cref="eventSource"/> set to null.</summary>
+				GuiControlSignalEventArgs()
+				{
+				}
+
+				/// <summary>Create an event arguments with <see cref="compositionSource"/> and <see cref="eventSource"/> set to a specified value.</summary>
+				/// <param name="composition">The speciied value to set <see cref="compositionSource"/> and <see cref="eventSource"/>.</param>
+				GuiControlSignalEventArgs(GuiGraphicsComposition* composition)
+					:GuiEventArgs(composition)
+				{
+				}
+			};
+
 			typedef GuiGraphicsEvent<GuiEventArgs>				GuiNotifyEvent;
 			typedef GuiGraphicsEvent<GuiRequestEventArgs>		GuiRequestEvent;
 			typedef GuiGraphicsEvent<GuiKeyEventArgs>			GuiKeyEvent;
 			typedef GuiGraphicsEvent<GuiCharEventArgs>			GuiCharEvent;
 			typedef GuiGraphicsEvent<GuiMouseEventArgs>			GuiMouseEvent;
+			typedef GuiGraphicsEvent<GuiControlSignalEventArgs>	GuiControlSignalEvent;
 
 /***********************************************************************
 Predefined Item Events
@@ -9516,6 +9547,26 @@ namespace vl
 
 		namespace controls
 		{
+			template<typename T, typename Enabled = YesType>
+			struct QueryServiceHelper;
+
+			template<typename T>
+			struct QueryServiceHelper<T, typename RequiresConvertable<decltype(T::Identifier), const wchar_t* const>::YesNoType>
+			{
+				static WString GetIdentifier()
+				{
+					return WString(T::Identifier, false);
+				}
+			};
+
+			template<typename T>
+			struct QueryServiceHelper<T, typename RequiresConvertable<decltype(T::GetIdentifier()), WString>::YesNoType>
+			{
+				static WString GetIdentifier()
+				{
+					return MoveValue<WString>(T::GetIdentifier());
+				}
+			};
 
 /***********************************************************************
 Basic Construction
@@ -9533,6 +9584,7 @@ Basic Construction
 
 			protected:
 				using ControlList = collections::List<GuiControl*>;
+				using ControlServiceMap = collections::Dictionary<WString, Ptr<IDescriptable>>;
 				using ControlTemplatePropertyType = TemplateProperty<templates::GuiControlTemplate>;
 
 			private:
@@ -9554,6 +9606,7 @@ Basic Construction
 				FontProperties							font;
 				description::Value						context;
 				compositions::IGuiAltActionHost*		activatingAltHost = nullptr;
+				ControlServiceMap						controlServices;
 
 				GuiControl*								parent = nullptr;
 				ControlList								children;
@@ -9572,6 +9625,7 @@ Basic Construction
 				virtual void							OnChildRemoved(GuiControl* control);
 				virtual void							OnParentChanged(GuiControl* oldParent, GuiControl* newParent);
 				virtual void							OnParentLineChanged();
+				virtual void							OnServiceAdded();
 				virtual void							OnRenderTargetChanged(elements::IGuiGraphicsRenderTarget* renderTarget);
 				virtual void							OnBeforeReleaseGraphicsHost();
 				virtual void							UpdateVisuallyEnabled();
@@ -9597,8 +9651,8 @@ Basic Construction
 				compositions::GuiNotifyEvent			ControlThemeNameChanged;
 				/// <summary>Control template changed event. This event will be raised when the control template is changed.</summary>
 				compositions::GuiNotifyEvent			ControlTemplateChanged;
-				/// <summary>Render target changed event. This event will be raised when the render target of the control is changed.</summary>
-				compositions::GuiNotifyEvent			RenderTargetChanged;
+				/// <summary>Control signal trigerred. This event will be raised because of multiple reason specified in the argument.</summary>
+				compositions::GuiControlSignalEvent		ControlSignalTrigerred;
 				/// <summary>Visible event. This event will be raised when the visibility state of the control is changed.</summary>
 				compositions::GuiNotifyEvent			VisibleChanged;
 				/// <summary>Enabled event. This event will be raised when the enabling state of the control is changed.</summary>
@@ -9749,10 +9803,16 @@ Basic Construction
 				/// <param name="identifier">The identifier.</param>
 				virtual IDescriptable*					QueryService(const WString& identifier);
 
+				/// <summary>Add a service to this control dynamically. The added service cannot override existing services.</summary>
+				/// <returns>Returns true if this operation succeeded.</returns>
+				/// <param name="identifier">The identifier. You are suggested to fill this parameter using the value from the interface's GetIdentifier function, or <see cref="QueryTypedService"/> will not work on this service.</param>
+				/// <param name="value">The service.</param>
+				bool									AddService(const WString& identifier, Ptr<IDescriptable> value);
+
 				template<typename T>
 				T* QueryTypedService()
 				{
-					return dynamic_cast<T*>(QueryService(T::Identifier));
+					return dynamic_cast<T*>(QueryService(QueryServiceHelper<T>::GetIdentifier()));
 				}
 			};
 
@@ -18225,12 +18285,6 @@ External Functions
 			extern void														GuiTableComposition_SetRows(presentation::compositions::GuiTableComposition* thisObject, vint value);
 			extern void														GuiTableComposition_SetColumns(presentation::compositions::GuiTableComposition* thisObject, vint value);
 			extern void														IGuiAltActionHost_CollectAltActions(presentation::compositions::IGuiAltActionHost* host, collections::List<presentation::compositions::IGuiAltAction*>& actions);
-
-			template<typename T>
-			WString Interface_GetIdentifier()
-			{
-				return T::Identifier;
-			}
 		}
 	}
 }

Import/GacUIReflection.cpp

@@ -836,7 +836,7 @@ namespace vl
 #define _ ,
 
 #define INTERFACE_IDENTIFIER(INTERFACE)\
-	CLASS_MEMBER_STATIC_EXTERNALMETHOD(GetIdentifier, NO_PARAMETER, WString(*)(), vl::reflection::description::Interface_GetIdentifier<::INTERFACE>)
+	CLASS_MEMBER_STATIC_EXTERNALMETHOD(GetIdentifier, NO_PARAMETER, WString(*)(), vl::presentation::controls::QueryServiceHelper<::INTERFACE>::GetIdentifier)
 
 /***********************************************************************
 Type Declaration (Extra)
@@ -1367,7 +1367,7 @@ namespace vl
 	CLASS_MEMBER_PROPERTY_READONLY_FAST(ControlTemplateObject)\
 
 #define INTERFACE_IDENTIFIER(INTERFACE)\
-	CLASS_MEMBER_STATIC_EXTERNALMETHOD(GetIdentifier, NO_PARAMETER, WString(*)(), vl::reflection::description::Interface_GetIdentifier<::INTERFACE>)
+	CLASS_MEMBER_STATIC_EXTERNALMETHOD(GetIdentifier, NO_PARAMETER, WString(*)(), vl::presentation::controls::QueryServiceHelper<::INTERFACE>::GetIdentifier)
 
 /***********************************************************************
 Type Declaration (Extra)
@@ -2030,7 +2030,7 @@ Type Declaration (Class)
 
 				CLASS_MEMBER_EXTERNALMETHOD(SafeDelete, NO_PARAMETER, void(GuiControl::*)(), vl::presentation::compositions::SafeDeleteControl)
 
-				CLASS_MEMBER_GUIEVENT(RenderTargetChanged)
+				CLASS_MEMBER_GUIEVENT(ControlSignalTrigerred)
 				CLASS_MEMBER_PROPERTY_GUIEVENT_FAST(ControlThemeName)
 				CLASS_MEMBER_PROPERTY_GUIEVENT_FAST(ControlTemplate)
 				CLASS_MEMBER_PROPERTY_READONLY_FAST(BoundsComposition)
@@ -2058,7 +2058,8 @@ Type Declaration (Class)
 				CLASS_MEMBER_METHOD(SetFocus, NO_PARAMETER)
 				CLASS_MEMBER_METHOD(DisplayTooltip, {L"location"})
 				CLASS_MEMBER_METHOD(CloseTooltip, NO_PARAMETER)
-				CLASS_MEMBER_METHOD_OVERLOAD(QueryService, {L"identifier"}, IDescriptable*(GuiControl::*)(const WString&))
+				CLASS_MEMBER_METHOD(QueryService, {L"identifier"})
+				CLASS_MEMBER_METHOD(AddService, { L"identifier" _ L"value" })
 			END_CLASS_MEMBER(GuiControl)
 
 			BEGIN_CLASS_MEMBER(GuiCustomControl)
@@ -2318,7 +2319,6 @@ Type Declaration (Class)
 				CONTROL_CONSTRUCTOR_CONTROLT_TEMPLATE_2(GuiMenu, GuiControl*, owner)
 
 				CLASS_MEMBER_METHOD(UpdateMenuService, NO_PARAMETER)
-				CLASS_MEMBER_METHOD(QueryService, {L"identifier"})
 			END_CLASS_MEMBER(GuiMenu)
 
 			BEGIN_CLASS_MEMBER(GuiMenuBar)
@@ -3164,6 +3164,18 @@ Type Declaration
 				CLASS_MEMBER_FIELD(nonClient)
 			END_CLASS_MEMBER(GuiMouseEventArgs)
 
+			BEGIN_ENUM_ITEM(ControlSignal)
+				ENUM_CLASS_ITEM(RenderTargetChanged)
+				ENUM_CLASS_ITEM(ParentLineChanged)
+				ENUM_CLASS_ITEM(ServiceAdded)
+			END_ENUM_ITEM(ControlSignal)
+
+			BEGIN_CLASS_MEMBER(GuiControlSignalEventArgs)
+				CLASS_MEMBER_BASE(GuiEventArgs)
+				
+				CLASS_MEMBER_FIELD(controlSignal)
+			END_CLASS_MEMBER(GuiControlSignalEventArgs)
+
 			BEGIN_CLASS_MEMBER(GuiItemEventArgs)
 				CLASS_MEMBER_BASE(GuiEventArgs)
 				EVENTARGS_CONSTRUCTOR(GuiItemEventArgs)

Import/GacUIReflection.h

@@ -266,6 +266,8 @@ Type List (Events)
 			F(presentation::compositions::GuiKeyEventArgs)\
 			F(presentation::compositions::GuiCharEventArgs)\
 			F(presentation::compositions::GuiMouseEventArgs)\
+			F(presentation::compositions::ControlSignal)\
+			F(presentation::compositions::GuiControlSignalEventArgs)\
 			F(presentation::compositions::GuiItemEventArgs)\
 			F(presentation::compositions::GuiItemMouseEventArgs)\
 			F(presentation::compositions::GuiNodeEventArgs)\

Import/GacUIWindows.cpp

@@ -13306,6 +13306,48 @@ WindowsImage
 				}
 			}
 
+			void CopyMetadataBody(IWICMetadataQueryReader* reader, IWICMetadataQueryWriter* writer, const WString& prefix)
+			{
+				IEnumString* enumString = nullptr;
+				HRESULT hr = reader->GetEnumerator(&enumString);
+				if (enumString)
+				{
+					while (true)
+					{
+						LPOLESTR metadataName = nullptr;
+						ULONG fetched = 0;
+						hr = enumString->Next(1, &metadataName, &fetched);
+						if (hr != S_OK) break;
+						if (fetched == 0) break;
+
+						PROPVARIANT metadataValue;
+						PropVariantInit(&metadataValue);
+						hr = reader->GetMetadataByName(metadataName, &metadataValue);
+						if (hr == S_OK)
+						{
+							if (metadataValue.vt == VT_UNKNOWN && metadataValue.punkVal)
+							{
+								IWICMetadataQueryReader* embeddedReader = nullptr;
+								hr = metadataValue.punkVal->QueryInterface<IWICMetadataQueryReader>(&embeddedReader);
+								if (embeddedReader)
+								{
+									CopyMetadataBody(embeddedReader, writer, prefix + metadataName);
+									embeddedReader->Release();
+								}
+							}
+							else
+							{
+								hr = writer->SetMetadataByName((prefix + metadataName).Buffer(), &metadataValue);
+							}
+							hr = PropVariantClear(&metadataValue);
+						}
+
+						CoTaskMemFree(metadataName);
+					}
+					enumString->Release();
+				}
+			}
+
 			template<typename TDecoder, typename TEncoder>
 			void CopyMetadata(TDecoder* decoder, TEncoder* encoder)
 			{
@@ -13315,30 +13357,7 @@ WindowsImage
 				hr = encoder->GetMetadataQueryWriter(&writer);
 				if (reader && writer)
 				{
-					IEnumString* enumString = nullptr;
-					hr = reader->GetEnumerator(&enumString);
-					if (enumString)
-					{
-						while (true)
-						{
-							LPOLESTR metadataName = nullptr;
-							ULONG fetched = 0;
-							hr = enumString->Next(0, &metadataName, &fetched);
-							if (hr != S_OK) break;
-							if (fetched == 0) break;
-
-							PROPVARIANT metadataValue;
-							hr = reader->GetMetadataByName(metadataName, &metadataValue);
-							if (hr == S_OK)
-							{
-								hr = writer->SetMetadataByName(metadataName, &metadataValue);
-								hr = PropVariantClear(&metadataValue);
-							}
-
-							CoTaskMemFree(metadataName);
-						}
-						enumString->Release();
-					}
+					CopyMetadataBody(reader, writer, WString::Empty);
 				}
 				if (reader) reader->Release();
 				if (writer) writer->Release();
@@ -13386,6 +13405,8 @@ WindowsImage
 				auto factory = GetWICImagingFactory();
 				GUID formatGUID;
 				HRESULT hr;
+
+				bool sameFormat = formatType == INativeImage::Unknown || formatType == GetFormat();
 				if (formatType == INativeImage::Unknown)
 				{
 					hr = bitmapDecoder->GetContainerFormat(&formatGUID);
@@ -13467,7 +13488,11 @@ WindowsImage
 							source->Release();
 						}
 					}
-					CopyMetadata(bitmapDecoder.Obj(), bitmapEncoder);
+
+					if (sameFormat)
+					{
+						CopyMetadata(bitmapDecoder.Obj(), bitmapEncoder);
+					}
 
 					UINT frameCount = 0;
 					bitmapDecoder->GetFrameCount(&frameCount);
@@ -13480,7 +13505,10 @@ WindowsImage
 						if (frameDecode && frameEncode)
 						{
 							hr = frameEncode->Initialize(NULL);
-							CopyMetadata(frameDecode, frameEncode);
+							if (sameFormat)
+							{
+								CopyMetadata(frameDecode, frameEncode);
+							}
 							hr = frameEncode->WriteSource(frameDecode, NULL);
 							hr = frameEncode->Commit();
 						}

Import/VlppWorkflowRuntime.cpp

@@ -5418,10 +5418,18 @@ WfTypeImpl
 			{
 				FOREACH(Ptr<WfClass>, td, classes)
 				{
+					if (td->GetBaseTypeDescriptorCount() == 0)
+					{
+						td->AddBaseType(description::GetTypeDescriptor<DescriptableObject>());
+					}
 					manager->SetTypeDescriptor(td->GetTypeName(), td);
 				}
 				FOREACH(Ptr<WfInterface>, td, interfaces)
 				{
+					if (td->GetBaseTypeDescriptorCount() == 0)
+					{
+						td->AddBaseType(description::GetTypeDescriptor<IDescriptable>());
+					}
 					manager->SetTypeDescriptor(td->GetTypeName(), td);
 				}
 				FOREACH(Ptr<WfStruct>, td, structs)

Import/VlppWorkflowRuntime.h

@@ -730,7 +730,7 @@ Instance
 				void									InstallBaseObject(ITypeDescriptor* td, Value& value);
 			};
 
-			class WfInterfaceInstance : public Object, public reflection::Description<WfInterfaceInstance>
+			class WfInterfaceInstance : public Object, public reflection::IDescriptable, public reflection::Description<WfInterfaceInstance>
 			{
 				typedef reflection::description::ITypeDescriptor			ITypeDescriptor;
 				typedef reflection::description::IMethodInfo				IMethodInfo;