UnrealEngineUWP/Engine/Plugins/Animation/ControlRig/Source/ControlRigDeveloper/Private/Graph/ControlRigGraphNode.cpp

// Copyright Epic Games, Inc. All Rights Reserved.

#include "Graph/ControlRigGraphNode.h"
#include "EdGraph/EdGraphPin.h"
#include "Graph/ControlRigGraph.h"
#include "Graph/ControlRigGraphSchema.h"
#include "Kismet2/BlueprintEditorUtils.h"
#include "Kismet2/KismetDebugUtilities.h"
#include "Kismet2/WatchedPin.h"
#include "KismetCompiler.h"
#include "BlueprintNodeSpawner.h"
#include "EditorCategoryUtils.h"
#include "BlueprintActionDatabaseRegistrar.h"
#include "ControlRig.h"
#include "Textures/SlateIcon.h"
#include "Units/RigUnit.h"
#include "ControlRigBlueprint.h"
#include "PropertyPathHelpers.h"
#include "Kismet2/Kismet2NameValidators.h"
#include "ScopedTransaction.h"
#include "StructReference.h"
#include "UObject/PropertyPortFlags.h"
#include "ControlRigBlueprintUtils.h"
#include "Curves/CurveFloat.h"
#include "RigVMCore/RigVMExecuteContext.h"
#include "ControlRigDeveloper.h"
#include "ControlRigObjectVersion.h"
#include "GraphEditAction.h"
#include "RigVMModel/Nodes/RigVMAggregateNode.h"
#include "RigVMModel/Nodes/RigVMFunctionReferenceNode.h"
#include "RigVMModel/Nodes/RigVMFunctionEntryNode.h"
#include "RigVMModel/Nodes/RigVMFunctionReturnNode.h"
#include "RigVMModel/Nodes/RigVMCollapseNode.h"
#include "RigVMModel/Nodes/RigVMInvokeEntryNode.h"
#include "RigVMModel/Nodes/RigVMDispatchNode.h"

#include UE_INLINE_GENERATED_CPP_BY_NAME(ControlRigGraphNode)

#if WITH_EDITOR
#include "IControlRigEditorModule.h"
#endif //WITH_EDITOR

#define LOCTEXT_NAMESPACE "ControlRigGraphNode"

TAutoConsoleVariable<bool> CVarControlRigDisableCompactNodes(TEXT("ControlRig.Graph.DisableCompactNodes"), false, TEXT("When true all nodes are going to be drawn as full nodes."));

UControlRigGraphNode::UControlRigGraphNode()
: Dimensions(0.0f, 0.0f)
, NodeTitle(FText::GetEmpty())
, FullNodeTitle(FText::GetEmpty())
, NodeTopologyVersion(INDEX_NONE)
, CachedTitleColor(FLinearColor(0.f, 0.f, 0.f, 0.f))
, CachedNodeColor(FLinearColor(0.f, 0.f, 0.f, 0.f))
#if WITH_EDITOR
, bEnableProfiling(false)
#endif
, CachedTemplate(nullptr)
{
	bHasCompilerMessage = false;
	ErrorType = (int32)EMessageSeverity::Info + 1;
}

FText UControlRigGraphNode::GetNodeTitle(ENodeTitleType::Type TitleType) const
{
	if(NodeTitle.IsEmpty())
	{
		FString SubTitle;
		if(URigVMNode* ModelNode = GetModelNode())
		{
			if (URigVMUnitNode* UnitNode = Cast<URigVMUnitNode>(ModelNode))
			{
				const UScriptStruct* ScriptStruct = UnitNode->GetScriptStruct();
				if (ScriptStruct && ScriptStruct->IsChildOf(FRigUnit::StaticStruct()))
				{
					if (TSharedPtr<FStructOnScope> StructOnScope = UnitNode->ConstructStructInstance())
					{
						FRigUnit* RigUnit = (FRigUnit*)StructOnScope->GetStructMemory();
						NodeTitle = FText::FromString(RigUnit->GetUnitLabel());
					}
				}
			}

			else if(URigVMFunctionReferenceNode* FunctionReferenceNode = Cast<URigVMFunctionReferenceNode>(ModelNode))
			{
				const FRigVMGraphFunctionHeader& ReferencedHeader = FunctionReferenceNode->GetReferencedFunctionHeader();
				{
					TSoftObjectPtr<URigVMFunctionReferenceNode> RefNodePtr(FunctionReferenceNode);
					const FString& PackagePath = ReferencedHeader.LibraryPointer.LibraryNode.GetLongPackageName();
					if(PackagePath != RefNodePtr.GetLongPackageName())
					{
						SubTitle = FString::Printf(TEXT("From %s"), *PackagePath);
					}
					else
					{
						static const FString LocalFunctionString = TEXT("Local Function");
						SubTitle = LocalFunctionString;
					}
				}
			}

			else if(URigVMCollapseNode* CollapseNode = Cast<URigVMCollapseNode>(ModelNode))
			{
				if(!CollapseNode->IsA<URigVMAggregateNode>())
				{
					static const FString CollapseNodeString = TEXT("Collapsed Graph");
					SubTitle = CollapseNodeString;
				}
			}

			else if(URigVMVariableNode* VariableNode = Cast<URigVMVariableNode>(ModelNode))
			{
				if(VariableNode->IsLocalVariable())
				{
					static const FString LocalVariableString = TEXT("Local Variable");
					const FString DefaultValue = VariableNode->GetVariableDescription().DefaultValue;
					if(DefaultValue.IsEmpty())
					{
						SubTitle = LocalVariableString;
					}
					else
					{
						SubTitle = FString::Printf(TEXT("%s\nDefault %s"), *LocalVariableString, *DefaultValue);
					}
				}
				else if (VariableNode->IsInputArgument())
				{
					SubTitle = TEXT("Input parameter");
				}
				else
				{
					if(UBlueprint* Blueprint = GetBlueprint())
					{
						const FName VariableName = VariableNode->GetVariableName();
						for(const FBPVariableDescription& NewVariable : Blueprint->NewVariables)
						{
							if(NewVariable.VarName == VariableName)
							{
								FString DefaultValue = NewVariable.DefaultValue;
								if(DefaultValue.IsEmpty())
								{
									static const FString VariableString = TEXT("Variable");
									SubTitle = VariableString;
								}
								else
								{
									// Change the order of values in rotators so that they match the pin order
									if (!NewVariable.VarType.IsContainer() && NewVariable.VarType.PinSubCategoryObject == TBaseStructure<FRotator>::Get())
									{
										TArray<FString> Values;
										DefaultValue.ParseIntoArray(Values, TEXT(","));
										if (Values.Num() == 3)
										{
											Values.Swap(0, 1);
											Values.Swap(0, 2);
										}
										DefaultValue = FString::Join(Values, TEXT(","));										
									}
									SubTitle = FString::Printf(TEXT("Default %s"), *DefaultValue);
								}
								break;
							}
						}
					}
				}

				if(SubTitle.Len() > 40)
				{
					SubTitle = SubTitle.Left(36) + TEXT(" ...");
				}
			}

			if (NodeTitle.IsEmpty())
			{
				NodeTitle = FText::FromString(ModelNode->GetNodeTitle());
			}
		}

		if(IsDeprecated())
		{
			NodeTitle = FText::FromString(FString::Printf(TEXT("%s (Deprecated)"), *NodeTitle.ToString()));
		}

		FullNodeTitle = NodeTitle;

		if(!SubTitle.IsEmpty())
		{
			FullNodeTitle = FText::FromString(FString::Printf(TEXT("%s\n%s"), *NodeTitle.ToString(), *SubTitle));
		}
	}

	if(TitleType == ENodeTitleType::FullTitle)
	{
		return FullNodeTitle;
	}
	return NodeTitle;
}

void UControlRigGraphNode::ReconstructNode()
{
	ReconstructNode_Internal();
}

void UControlRigGraphNode::ReconstructNode_Internal(bool bForce)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	UControlRigGraph* RigGraph = Cast<UControlRigGraph>(GetOuter()); 
	if (RigGraph && !bForce)
	{
		if (RigGraph->bIsTemporaryGraphForCopyPaste)
		{
			return;
		}

		// if this node has been saved prior to our custom version,
		// don't reset the node
		int32 LinkerVersion = RigGraph->GetLinkerCustomVersion(FControlRigObjectVersion::GUID);
		if (LinkerVersion < FControlRigObjectVersion::SwitchedToRigVM)
		{
			return;
		}
	}

#if WITH_EDITOR
	bEnableProfiling = false;
	if(RigGraph)
	{
		if(UControlRigBlueprint* RigBlueprint = RigGraph->GetBlueprint())
		{
			bEnableProfiling = RigBlueprint->VMRuntimeSettings.bEnableProfiling;
		}
	}
#endif

	// Clear previously set messages
	ErrorMsg.Reset();

	// Move the existing pins to a saved array.
	// This way we can reuse them later
	LastEdGraphPins = Pins;

	// Also make sure to clean up any indirections
	// on them.
	for(UEdGraphPin* LastEdGraphPin : LastEdGraphPins)
	{
		LastEdGraphPin->ParentPin = nullptr;
		LastEdGraphPin->SubPins.Reset();
	}
	Pins.Reset();

	// Recreate the new pins
	ReallocatePinsDuringReconstruction(LastEdGraphPins);

	// Maintain watches up to date
	if (URigVMNode* Node = GetModelNode())
	{
		UBlueprint* Blueprint = GetBlueprint();
		for (UEdGraphPin* NewPin : Pins)
		{
			const FString PinName = NewPin->GetName();
			FString Left, Right = PinName;
			URigVMPin::SplitPinPathAtStart(PinName, Left, Right);
			if (URigVMPin* ModelPin = Node->FindPin(Right))
			{
				if (ModelPin->RequiresWatch())
				{
					FKismetDebugUtilities::AddPinWatch(Blueprint, FBlueprintWatchedPin(NewPin));
				}
			}
		}
	}
	
	// LogBlueprint: Warning: UEdGraphPin::DestroyImpl BasicIKSetup_0.UpperBone? causing an issue?
	// we may need to clean these pins in the opposite order? child pins first?
	RewireOldPinsToNewPins(LastEdGraphPins, Pins);
	LastEdGraphPins.Reset();

	DrawAsCompactNodeCache.Reset();

	// Let subclasses do any additional work
	PostReconstructNode();

	if(bForce)
	{
		if (RigGraph)
		{
			RigGraph->NotifyGraphChanged();
		}
	}
	else
	{
		InvalidateNodeTitle();
		OnNodePinsChanged().Broadcast();
	}
}

bool UControlRigGraphNode::IsDeprecated() const
{
	if(URigVMNode* ModelNode = GetModelNode())
	{
		if(URigVMUnitNode* StructModelNode = Cast<URigVMUnitNode>(ModelNode))
		{
			return StructModelNode->IsDeprecated();
		}
	}
	return Super::IsDeprecated();
}

FEdGraphNodeDeprecationResponse UControlRigGraphNode::GetDeprecationResponse(EEdGraphNodeDeprecationType DeprecationType) const
{
	FEdGraphNodeDeprecationResponse Response = Super::GetDeprecationResponse(DeprecationType);

	if(URigVMNode* ModelNode = GetModelNode())
	{
		if(URigVMUnitNode* StructModelNode = Cast<URigVMUnitNode>(ModelNode))
		{
			FString DeprecatedMetadata = StructModelNode->GetDeprecatedMetadata();
			if (!DeprecatedMetadata.IsEmpty())
			{
				FFormatNamedArguments Args;
				Args.Add(TEXT("DeprecatedMetadata"), FText::FromString(DeprecatedMetadata));
				Response.MessageText = FText::Format(LOCTEXT("ControlRigGraphNodeDeprecationMessage", "Warning: This node is deprecated from: {DeprecatedMetadata}"), Args);
			}
		}
	}

	return Response;
}

void UControlRigGraphNode::ReallocatePinsDuringReconstruction(const TArray<UEdGraphPin*>& OldPins)
{
	AllocateDefaultPins();
}

void UControlRigGraphNode::RewireOldPinsToNewPins(TArray<UEdGraphPin*>& InOldPins, TArray<UEdGraphPin*>& InNewPins)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	for(UEdGraphPin* OldPin : InOldPins)
	{
		for(UEdGraphPin* NewPin : InNewPins)
		{
			if(OldPin->PinName == NewPin->PinName && OldPin->Direction == NewPin->Direction)
			{
				if (OldPin->PinType == NewPin->PinType ||
					OldPin->PinType.PinSubCategoryObject == RigVMTypeUtils::GetWildCardCPPTypeObject() ||
					NewPin->PinType.PinSubCategoryObject == RigVMTypeUtils::GetWildCardCPPTypeObject())
				{
					// make sure to remove invalid entries from the linked to list
					OldPin->LinkedTo.Remove(nullptr);
				
					NewPin->MovePersistentDataFromOldPin(*OldPin);
					break;
				}
			}
		}
	}

	DestroyPinList(InOldPins);
}

void UControlRigGraphNode::DestroyPinList(TArray<UEdGraphPin*>& InPins)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	UBlueprint* Blueprint = GetBlueprint();
	bool bNotify = false;
	if (Blueprint != nullptr)
	{
		bNotify = !Blueprint->bIsRegeneratingOnLoad;
	}

	// Throw away the original pins
	for (UEdGraphPin* Pin : InPins)
	{
		// previously serialized graphs potentially contain
		// nullptr in the subpins
		Pin->SubPins.Remove(nullptr);
		
		Pin->BreakAllPinLinks(bNotify);
		Pin->SubPins.Remove(nullptr);
		UEdGraphNode::DestroyPin(Pin);
	}
}

void UControlRigGraphNode::PostReconstructNode()
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	for (UEdGraphPin* Pin : Pins)
	{
		SetupPinDefaultsFromModel(Pin);
	}

	bCanRenameNode = false;

	if(URigVMNode* ModelNode = GetModelNode())
	{
		SetColorFromModel(ModelNode->GetNodeColor());
	}
}

void UControlRigGraphNode::SetColorFromModel(const FLinearColor& InColor)
{
	static const FLinearColor TitleToNodeColor(0.35f, 0.35f, 0.35f, 1.f);
	CachedNodeColor = InColor * TitleToNodeColor;
	CachedTitleColor = InColor;
}

void UControlRigGraphNode::HandleClearArray(FString InPinPath)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if(URigVMController* Controller = GetController())
	{
		Controller->ClearArrayPin(InPinPath);
	}
}

void UControlRigGraphNode::HandleAddArrayElement(FString InPinPath)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if (URigVMController* Controller = GetController())
	{
		Controller->OpenUndoBracket(TEXT("Add Array Pin"));
		FString PinPath = Controller->AddArrayPin(InPinPath, FString(), true, true);
		Controller->SetPinExpansion(InPinPath, true);
		Controller->SetPinExpansion(PinPath, true);
		Controller->CloseUndoBracket();
	}
}

void UControlRigGraphNode::HandleRemoveArrayElement(FString InPinPath)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if (URigVMController* Controller = GetController())
	{
		Controller->RemoveArrayPin(InPinPath, true, true);
	}
}

void UControlRigGraphNode::HandleInsertArrayElement(FString InPinPath)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if (URigVMController* Controller = GetController())
	{
		if (URigVMPin* ArrayElementPin = GetModelPinFromPinPath(InPinPath))
			{
			if (URigVMPin* ArrayPin = ArrayElementPin->GetParentPin())
				{
				Controller->OpenUndoBracket(TEXT("Add Array Pin"));
				FString PinPath = Controller->InsertArrayPin(InPinPath, ArrayElementPin->GetPinIndex() + 1, FString(), true, true);
				Controller->SetPinExpansion(InPinPath, true);
				Controller->SetPinExpansion(PinPath, true);
				Controller->CloseUndoBracket();
			}
		}
	}
}

int32 UControlRigGraphNode::GetInstructionIndex(bool bAsInput) const
{
	if (UControlRigGraph* RigGraph = Cast<UControlRigGraph>(GetGraph()))
	{
		return RigGraph->GetInstructionIndex(this, bAsInput);
	}
	return INDEX_NONE;
}

const FRigVMTemplate* UControlRigGraphNode::GetTemplate() const
{
	if(CachedTemplate == nullptr)
	{
		const FRigVMRegistry& Registry = FRigVMRegistry::Get();
		if(URigVMTemplateNode* TemplateNode = Cast<URigVMTemplateNode>(GetModelNode()))
		{
			CachedTemplate = TemplateNode->GetTemplate();
		}
		else if(const FRigVMTemplate* Template = Registry.FindTemplate(*ModelNodePath))
		{
			CachedTemplate = Template; 
		}
	}
	return CachedTemplate;
}

void UControlRigGraphNode::ClearErrorInfo()
{
	bHasCompilerMessage = false;
	// SControlRigGraphNode only updates if the error types do not match so we have
	// clear the error type as well, see SControlRigGraphNode::RefreshErrorInfo()
	ErrorType = (int32)EMessageSeverity::Info + 1;
	ErrorMsg = FString();	
}

URigVMPin* UControlRigGraphNode::FindModelPinFromGraphPin(const UEdGraphPin* InGraphPin) const
{
	if(InGraphPin == nullptr)
	{
		return nullptr;
	}
	
	for(const auto& Pair : CachedPins)
	{
		if(Pair.Value.InputPin == InGraphPin ||
			Pair.Value.OutputPin == InGraphPin)
		{
			return Pair.Key;
		}
	}

	return GetModelPinFromPinPath(InGraphPin->GetName());
}

UEdGraphPin* UControlRigGraphNode::FindGraphPinFromModelPin(const URigVMPin* InModelPin, bool bAsInput) const
{
	if(InModelPin == nullptr)
	{
		return nullptr;
	}
	
	if(const FPinPair* Pair = CachedPins.Find(InModelPin))
	{
		return bAsInput ? Pair->InputPin : Pair->OutputPin;
	}

	const FString PinPath = InModelPin->GetPinPath();
	for(UEdGraphPin* GraphPin : Pins)
	{
		if((GraphPin->Direction == EGPD_Input) == bAsInput)
		{
			if(GraphPin->GetName() == PinPath)
			{
				return GraphPin;
			}
		}
	}
	
	return nullptr;
}

void UControlRigGraphNode::SynchronizeGraphPinNameWithModelPin(const URigVMPin* InModelPin, bool bNotify)
{
	auto SyncGraphPinLambda = [this](const URigVMPin* InModelPin, bool bAsInput) -> bool
	{
		if(UEdGraphPin* GraphPin = FindGraphPinFromModelPin(InModelPin, bAsInput))
		{
			const FString OldPinName = GraphPin->PinName.ToString();
			const FString NewPinName = InModelPin->GetPinPath();

			if(OldPinName != NewPinName)
			{
				PinPathToModelPin.Remove(OldPinName);
				
				GraphPin->PinName = *NewPinName;
				GraphPin->PinFriendlyName = FText::FromName(InModelPin->GetDisplayName());

				PinPathToModelPin.Add(NewPinName, (URigVMPin*)InModelPin);
				return true;
			}
		}

		return false;
	};

	bool bResult = false;
	
	if(SyncGraphPinLambda(InModelPin, true))
	{
		bResult = true;
	}
	if(SyncGraphPinLambda(InModelPin, false))
	{
		bResult = true;
	}

	if(bResult)
	{
		for (const URigVMPin* ModelSubPin : InModelPin->GetSubPins())
		{
			SynchronizeGraphPinNameWithModelPin(ModelSubPin, false);
		}

		if(bNotify)
		{
			// Notify the node widget that the pins have changed.
			OnNodePinsChanged().Broadcast();
		}
	}
}

void UControlRigGraphNode::SynchronizeGraphPinValueWithModelPin(const URigVMPin* InModelPin)
{
	auto SyncGraphPinLambda = [this](const URigVMPin* InModelPin, bool bAsInput)
	{
		// If the pin has sub-pins, we may need to remove or rebuild the sub-pins.
		if (UEdGraphPin* GraphPin = FindGraphPinFromModelPin(InModelPin, bAsInput))
		{
			SetupPinDefaultsFromModel(GraphPin, InModelPin);
		}
	};

	SyncGraphPinLambda(InModelPin, true);
	SyncGraphPinLambda(InModelPin, false);
}

void UControlRigGraphNode::SynchronizeGraphPinTypeWithModelPin(const URigVMPin* InModelPin)
{
	bool bNotify = false;

	auto SyncGraphPinLambda = [this, &bNotify](const URigVMPin* InModelPin, bool bAsInput)
	{
		// If the pin has sub-pins, we may need to remove or rebuild the sub-pins.
		if (UEdGraphPin* GraphPin = FindGraphPinFromModelPin(InModelPin, bAsInput))
		{
			const FEdGraphPinType NewGraphPinType = GetPinTypeForModelPin(InModelPin);
			if(NewGraphPinType != GraphPin->PinType)
			{
				GraphPin->PinType = NewGraphPinType;
				ConfigurePin(GraphPin, InModelPin);

				// Create new sub-pins, if required, to reflect the new type.
				TArray<UEdGraphPin*> GraphSubPinsToKeep;
				if (!InModelPin->GetSubPins().IsEmpty())
				{
					for (const URigVMPin* ModelSubPin : InModelPin->GetSubPins())
					{
						if(UEdGraphPin* GraphSubPin = FindGraphPinFromModelPin(ModelSubPin, bAsInput))
						{
							GraphSubPinsToKeep.Add(GraphSubPin);

							const FEdGraphPinType NewGraphSubPinType = GetPinTypeForModelPin(ModelSubPin);
							if(NewGraphSubPinType != GraphSubPin->PinType)
							{
								GraphSubPin->PinType = NewGraphSubPinType;
								ConfigurePin(GraphSubPin, ModelSubPin);
							}
						}
						else
						{
							CreateGraphPinFromModelPin(ModelSubPin, GraphPin->Direction, GraphPin);
						}
					}
				}

				// If the graph node had other sub-pins, we need to remove those.
				RemoveGraphSubPins(GraphPin, GraphSubPinsToKeep);

				bNotify = true;
			}
		}
	};

	SyncGraphPinLambda(InModelPin, true);
	SyncGraphPinLambda(InModelPin, false);

	if(bNotify)
	{
		// Notify the node widget that the pins have changed.
		OnNodePinsChanged().Broadcast();
	}
}

void UControlRigGraphNode::SynchronizeGraphPinExpansionWithModelPin(const URigVMPin* InModelPin)
{
	OnNodePinExpansionChanged().Broadcast();
}

void UControlRigGraphNode::SyncGraphNodeTitleWithModelNodeTitle()
{
	InvalidateNodeTitle();
}

void UControlRigGraphNode::SyncGraphNodeNameWithModelNodeName(const URigVMNode* InModelNode)
{
	Rename(*InModelNode->GetName());
	ModelNodePath = InModelNode->GetNodePath();
	SyncGraphNodeTitleWithModelNodeTitle();

	TArray<URigVMPin*> AllModelPins = InModelNode->GetAllPinsRecursively();
	for(const URigVMPin* ModelPin : AllModelPins)
	{
		SynchronizeGraphPinNameWithModelPin(ModelPin);
	}
}

bool UControlRigGraphNode::CreateGraphPinFromModelPin(const URigVMPin* InModelPin, EEdGraphPinDirection InDirection,
	UEdGraphPin* InParentPin)
{
	// don't create output pins for array elements
	if(InDirection == EGPD_Output && InModelPin->IsArrayElement() && !InModelPin->GetParentPin()->IsFixedSizeArray())
	{
		return false;
	}

	const FPinPair PairConst = CachedPins.FindOrAdd((URigVMPin*)InModelPin);

	auto CreatePinLambda = [this](const URigVMPin* InModelPin, EEdGraphPinDirection InDirection, UEdGraphPin* InParentPin) -> UEdGraphPin*
	{
		// check if we already have a pin like this in the last pins arrays
		const FString PinPath = InModelPin->GetPinPath();
		const FEdGraphPinType PinType = GetPinTypeForModelPin(InModelPin);

		UEdGraphPin* GraphPin = nullptr;
		UEdGraphPin** ExistingEdGraphPinPtr = LastEdGraphPins.FindByPredicate([PinPath, InDirection, PinType](const UEdGraphPin* ExistingPin) -> bool
		{
			return !ExistingPin->bWasTrashed &&
				ExistingPin->GetName() == PinPath &&
				ExistingPin->Direction == InDirection &&
				ExistingPin->PinType == PinType;
		});
		if(ExistingEdGraphPinPtr)
		{
			GraphPin = *ExistingEdGraphPinPtr;
			GraphPin->ParentPin = nullptr;
			GraphPin->SubPins.Reset();
			ExistingEdGraphPinPtr = nullptr;
			LastEdGraphPins.Remove(GraphPin);
			Pins.Add(GraphPin);
		}

		if(GraphPin == nullptr)
		{
			GraphPin = CreatePin(InDirection, GetPinTypeForModelPin(InModelPin), FName(*InModelPin->GetPinPath()));
		}
		
		if (GraphPin)
		{
			ConfigurePin(GraphPin, InModelPin);

			if (InParentPin)
			{
				InParentPin->SubPins.Add(GraphPin);
				GraphPin->ParentPin = InParentPin;
			}
			
			for(const URigVMPin* ModelSubPin : InModelPin->GetSubPins())
			{
				CreateGraphPinFromModelPin(ModelSubPin, InDirection, GraphPin);
			}

			SetupPinDefaultsFromModel(GraphPin, InModelPin);
		}

		return GraphPin;
	};

	UEdGraphPin* InputPin = nullptr;
	UEdGraphPin* OutputPin = nullptr;

	bool bResult = false;
	if (InDirection == EGPD_Input && PairConst.InputPin == nullptr)
	{
		InputPin = CreatePinLambda(InModelPin, EGPD_Input, InParentPin);
		bResult = true;
	}
	if (InDirection == EGPD_Output && PairConst.OutputPin == nullptr)
	{
		OutputPin = CreatePinLambda(InModelPin, EGPD_Output, InParentPin);
		bResult = true;
	}

	FPinPair& Pair = CachedPins.FindChecked((URigVMPin*)InModelPin);
	Pair.InputPin = InputPin != nullptr ? InputPin : Pair.InputPin;
	Pair.OutputPin = OutputPin != nullptr ? OutputPin : Pair.OutputPin;
	return Pair.IsValid() && bResult;
}

void UControlRigGraphNode::RemoveGraphSubPins(UEdGraphPin* InParentPin, const TArray<UEdGraphPin*>& InPinsToKeep)
{
	TArray<UEdGraphPin*> SubPins = InParentPin->SubPins;

	TArray<URigVMPin*> ModelSubPins;
	for (const UEdGraphPin* SubPin: SubPins)
	{
		if(InPinsToKeep.Contains(SubPin))
		{
			continue;
		}
		for(const auto& Pair : CachedPins)
		{
			if(Pair.Value.InputPin == SubPin ||
				Pair.Value.OutputPin == SubPin)
			{
				ModelSubPins.Add(Pair.Key);
			}
		}
	}

	for(const URigVMPin* ModelSubPin : ModelSubPins)
	{
		PinPathToModelPin.Remove(ModelSubPin->GetPinPath());

		if(const FPinPair* PinPair = CachedPins.Find(ModelSubPin))
		{
			auto Traverse = [this](UEdGraphPin* SubPin)
			{
				if(SubPin == nullptr)
				{
					return;
				}
				
				// Remove this pin from our owned pins
				Pins.Remove(SubPin);

				if (!SubPin->SubPins.IsEmpty())
				{
					RemoveGraphSubPins(SubPin);
				}

				SubPin->MarkAsGarbage();
			};
			
			Traverse(PinPair->InputPin);
			Traverse(PinPair->OutputPin);
		}

		CachedPins.Remove(ModelSubPin);
	}
	InParentPin->SubPins.Reset();
}

bool UControlRigGraphNode::ModelPinsChanged(bool bForce)
{
	UpdatePinLists();

	// check if any of the pins need to be added / removed
	auto AddMissingPins = [this](const TArray<URigVMPin*>& InModelPins)
	{
		int32 PinsAdded = 0;
		for(const URigVMPin* ModelPin : InModelPins)
		{
			if(FindGraphPinFromModelPin(ModelPin, true) == nullptr && 
				FindGraphPinFromModelPin(ModelPin, false))
			{
				PinsAdded += ModelPinAdded_Internal(ModelPin) ? 1 : 0;
			}
		}
		return PinsAdded;
	};

	auto RemoveObsoletePins = [this]()
	{
		TArray<URigVMPin*> PinsToRemove; 
		for(const auto& Pair : CachedPins)
		{
			URigVMPin* ModelPin = Pair.Key;
			TArray<URigVMPin*>& List = PinListForPin(ModelPin);
			bool bRemove = true;
			if (URigVMPin** FoundPin = List.FindByKey(ModelPin->GetRootPin()))
			{
				if (ModelPin->GetParentPin() == nullptr ||
					(*FoundPin)->FindSubPin(ModelPin->GetSegmentPath()))
				{
					bRemove = false;
				}
			}
			if(bRemove)
			{
				PinsToRemove.Add(ModelPin);
			}
		}

		int32 PinsRemoved = 0;
		for(const URigVMPin* ModelPin : PinsToRemove)
		{
			PinsRemoved += ModelPinRemoved_Internal(ModelPin) ? 1 : 0;
		}
		return PinsRemoved;
	};

	auto OrderPins = [this](const TArray<URigVMPin*>& InModelPins) -> int32
	{
		if(InModelPins.Num() < 2)
		{
			return 0;
		}

		TArray<UEdGraphPin*> OrderedGraphPins;
		OrderedGraphPins.Reserve(InModelPins.Num() * 2);
		int32 LastInputIndex = INDEX_NONE;
		int32 LastOutputIndex = INDEX_NONE;
		int32 PinsToReorder = 0;

		for(const URigVMPin* ModelPin : InModelPins)
		{
			if(UEdGraphPin* InputGraphPin = FindGraphPinFromModelPin(ModelPin, true))
			{
				OrderedGraphPins.Add(InputGraphPin);
				const int32 InputPinIndex = Pins.Find(InputGraphPin);
				if(LastInputIndex > InputPinIndex)
				{
					PinsToReorder++;
				}
				LastInputIndex = InputPinIndex;
			}
			
			if(UEdGraphPin* OutputGraphPin = FindGraphPinFromModelPin(ModelPin, false))
			{
				OrderedGraphPins.Add(OutputGraphPin);
				const int32 OutputPinIndex = Pins.Find(OutputGraphPin);
				if(LastOutputIndex > OutputPinIndex)
				{
					PinsToReorder++;
				}
				LastOutputIndex = OutputPinIndex;
			}
		}

		if(PinsToReorder > 0)
		{
			for(UEdGraphPin* GraphPinInOrder : OrderedGraphPins)
			{
				Pins.Remove(GraphPinInOrder);
			}

			OrderedGraphPins.Append(Pins);
			Swap(OrderedGraphPins, Pins);
		}

		return PinsToReorder;
	};
	
	int32 PinsAdded = 0;
	PinsAdded += AddMissingPins(ExecutePins);
	PinsAdded += AddMissingPins(InputPins);
	PinsAdded += AddMissingPins(InputOutputPins);
	PinsAdded += AddMissingPins(OutputPins);

	const int32 PinsRemoved = RemoveObsoletePins();

	// working through it in the opposite order
	// due to the use of Append within the lambda
	int32 PinsReordered = 0;
	PinsReordered += OrderPins(OutputPins);
	PinsReordered += OrderPins(InputOutputPins);
	PinsReordered += OrderPins(InputPins);
	PinsReordered += OrderPins(ExecutePins);

	const bool bResult = (PinsAdded > 0) || (PinsRemoved > 0) || (PinsReordered > 0); 
	if(bResult || bForce)
	{
		OnNodePinsChanged().Broadcast();
	}
	return bResult;
}

bool UControlRigGraphNode::ModelPinAdded(const URigVMPin* InModelPin)
{
	if(InModelPin == nullptr)
	{
		return false;
	}

	UpdatePinLists();

	bool bResult = ModelPinAdded_Internal(InModelPin);
	if(bResult)
	{
		OnNodePinsChanged().Broadcast();
	}
	return bResult;
}

bool UControlRigGraphNode::ModelPinAdded_Internal(const URigVMPin* InModelPin)
{
	bool bResult = false;

	// conversion nodes don't show sub pins
	if(!InModelPin->IsRootPin())
	{
		if(DrawAsCompactNode())
		{
			return false;
		}
	}

	UEdGraphPin* InputParentPin = FindGraphPinFromModelPin(InModelPin->GetParentPin(), true);
	UEdGraphPin* OutputParentPin = FindGraphPinFromModelPin(InModelPin->GetParentPin(), false);
		
	if(InModelPin->GetDirection() == ERigVMPinDirection::Input ||
		InModelPin->GetDirection() == ERigVMPinDirection::Visible ||
		InModelPin->GetDirection() == ERigVMPinDirection::IO)
	{
		if(CreateGraphPinFromModelPin(InModelPin, EGPD_Input, InputParentPin))
		{
			bResult = true;
		}
	}
	
	if(InModelPin->GetDirection() == ERigVMPinDirection::Output ||
		InModelPin->GetDirection() == ERigVMPinDirection::IO)
	{
		if(CreateGraphPinFromModelPin(InModelPin, EGPD_Output, OutputParentPin))
		{
			bResult = true;
		}
	}
	
	return bResult;
}

bool UControlRigGraphNode::ModelPinRemoved(const URigVMPin* InModelPin)
{
	if(InModelPin == nullptr)
	{
		return false;
	}

	UpdatePinLists();

	const bool bResult = ModelPinRemoved_Internal(InModelPin);
	if(bResult)
	{
		OnNodePinsChanged().Broadcast();
	}
	return bResult;
}

bool UControlRigGraphNode::DrawAsCompactNode() const
{
	if(CVarControlRigDisableCompactNodes.GetValueOnAnyThread())
	{
		return false;
	}
	
	if(!DrawAsCompactNodeCache.IsSet())
	{
		DrawAsCompactNodeCache = false;
		if(const URigVMTemplateNode* TemplateModelNode = Cast<URigVMTemplateNode>(GetModelNode()))
		{
			if(TemplateModelNode->GetNotation() == RigVMTypeUtils::GetCastTemplateNotation())
			{
				DrawAsCompactNodeCache = true;
				
				// if the node has links on any subpin - we can't draw it as a compact node.
				const TArray<URigVMLink*> Links = TemplateModelNode->GetLinks();
				if(Links.ContainsByPredicate([TemplateModelNode](const URigVMLink* Link)
				{
					if(const URigVMPin* SourcePin = Link->GetSourcePin())
					{
						if(SourcePin->GetNode() == TemplateModelNode)
						{
							return !SourcePin->IsRootPin();
						}
					}
					if(const URigVMPin* TargetPin = Link->GetTargetPin())
					{
						if(TargetPin->GetNode() == TemplateModelNode)
						{
							return !TargetPin->IsRootPin();
						}
					}
					return false;
				}))
				{
					DrawAsCompactNodeCache = false;
				}

				// if the node has any injected nodes - we can't draw it as compact
				if(TemplateModelNode->GetPins().ContainsByPredicate([](const URigVMPin* Pin)
				{
					return Pin->HasInjectedNodes();
				}))
				{
					DrawAsCompactNodeCache = false;
				}
			}
		}
	}
	return DrawAsCompactNodeCache.GetValue();
}

bool UControlRigGraphNode::ModelPinRemoved_Internal(const URigVMPin* InModelPin)
{
	auto RemoveGraphPin = [this](const URigVMPin* InModelPin, bool bAsInput)
	{
		if(UEdGraphPin* GraphPin = FindGraphPinFromModelPin(InModelPin, bAsInput))
		{
			RemoveGraphSubPins(GraphPin);
			Pins.Remove(GraphPin);
			GraphPin->MarkAsGarbage();
		}
	};
	RemoveGraphPin(InModelPin, true);
	RemoveGraphPin(InModelPin, false);
		
	const bool bResult = PinPathToModelPin.Remove(InModelPin->GetPinPath()) > 0;
	CachedPins.Remove(InModelPin);
	return bResult;
}

FLinearColor UControlRigGraphNode::GetNodeProfilingColor() const
{
#if WITH_EDITOR
	if(bEnableProfiling)
	{
		if(UControlRigBlueprint* Blueprint = GetTypedOuter<UControlRigBlueprint>())
		{
			if(UControlRig* DebuggedControlRig = Cast<UControlRig>(Blueprint->GetObjectBeingDebugged()))
			{
				if(URigVMNode* ModelNode = GetModelNode())
				{
					const double MicroSeconds = ModelNode->GetInstructionMicroSeconds(DebuggedControlRig->GetVM(), FRigVMASTProxy());
					if(MicroSeconds >= 0.0)
					{
						if(Blueprint->RigGraphDisplaySettings.bAutoDetermineRange)
						{
							if(MicroSeconds < Blueprint->RigGraphDisplaySettings.MinMicroSeconds)
							{
								Blueprint->RigGraphDisplaySettings.MinMicroSeconds = MicroSeconds;
							}
							if(MicroSeconds > Blueprint->RigGraphDisplaySettings.MaxMicroSeconds)
							{
								Blueprint->RigGraphDisplaySettings.MaxMicroSeconds = MicroSeconds;
							}
						}
							
						const double MinMicroSeconds = Blueprint->RigGraphDisplaySettings.LastMinMicroSeconds;
						const double MaxMicroSeconds = Blueprint->RigGraphDisplaySettings.LastMaxMicroSeconds;
						if(MaxMicroSeconds <= MinMicroSeconds)
						{
							return FLinearColor::Black;
						}
			
						const FLinearColor& MinColor = Blueprint->RigGraphDisplaySettings.MinDurationColor;
						const FLinearColor& MaxColor = Blueprint->RigGraphDisplaySettings.MaxDurationColor;

						const double T = (MicroSeconds - MinMicroSeconds) / (MaxMicroSeconds - MinMicroSeconds);
						return FMath::Lerp<FLinearColor>(MinColor, MaxColor, (float)T);
					}
				}
			}
		}
	}
#endif
	return FLinearColor::Black;
}

void UControlRigGraphNode::UpdatePinLists()
{
	ExecutePins.Reset();
	InputPins.Reset();
	InputOutputPins.Reset();
	OutputPins.Reset();

	if (URigVMNode* ModelNode = GetModelNode())
	{
		for(int32 PinListIndex=0; PinListIndex<2; PinListIndex++)
		{
			const TArray<URigVMPin*>& ModelPins = PinListIndex == 0 ? ModelNode->GetPins() : ModelNode->GetOrphanedPins();
			for (URigVMPin* ModelPin : ModelPins)
			{
				if (ModelPin->ShowInDetailsPanelOnly())
				{
					continue;
				}
				if (ModelPin->GetDirection() == ERigVMPinDirection::IO)
				{
					if (ModelPin->IsStruct())
					{
						const UScriptStruct* ScriptStruct = ModelPin->GetScriptStruct();
						if (ScriptStruct && ScriptStruct->IsChildOf(FRigVMExecuteContext::StaticStruct()))
						{
							ExecutePins.Add(ModelPin);
							continue;
						}
					}
					InputOutputPins.Add(ModelPin);
				}
				else if (ModelPin->GetDirection() == ERigVMPinDirection::Input || 
					ModelPin->GetDirection() == ERigVMPinDirection::Visible)
				{
					InputPins.Add(ModelPin);
				}
				else if (ModelPin->GetDirection() == ERigVMPinDirection::Output)
				{
					OutputPins.Add(ModelPin);
				}
			}
		}
	}
}

void UControlRigGraphNode::AllocateDefaultPins()
{
	UpdatePinLists();

	CachedPins.Reset();
	PinPathToModelPin.Reset();

	auto CreateGraphPins = [this](const TArray<URigVMPin*>& InModelPins)
	{
		for (const URigVMPin* ModelPin : InModelPins)
		{
			ModelPinAdded_Internal(ModelPin);
		}
	};

	CreateGraphPins(ExecutePins);
	CreateGraphPins(InputPins);
	CreateGraphPins(InputOutputPins);
	CreateGraphPins(OutputPins);

	// Fill the variable list
	ExternalVariables.Reset();
	if (URigVMFunctionReferenceNode* FunctionReferenceNode = Cast<URigVMFunctionReferenceNode>(GetModelNode()))
	{
		if(FunctionReferenceNode->RequiresVariableRemapping())
		{
			TArray<FRigVMExternalVariable> CurrentExternalVariables = FunctionReferenceNode->GetExternalVariables(false);
			for(const FRigVMExternalVariable& CurrentExternalVariable : CurrentExternalVariables)
			{
				ExternalVariables.Add(MakeShared<FRigVMExternalVariable>(CurrentExternalVariable));
			}
		}
	}
}

UClass* UControlRigGraphNode::GetControlRigGeneratedClass() const
{
	const UControlRigBlueprint* Blueprint = GetTypedOuter<UControlRigBlueprint>();
	if(Blueprint)
	{
		if (Blueprint->GeneratedClass)
		{
			check(Blueprint->GeneratedClass->IsChildOf(UControlRig::StaticClass()));
			return Blueprint->GeneratedClass;
		}
	}

	return nullptr;
}

UClass* UControlRigGraphNode::GetControlRigSkeletonGeneratedClass() const
{
	const UControlRigBlueprint* Blueprint = GetTypedOuter<UControlRigBlueprint>();
	if(Blueprint)
	{
		if (Blueprint->SkeletonGeneratedClass)
		{
			check(Blueprint->SkeletonGeneratedClass->IsChildOf(UControlRig::StaticClass()));
			return Blueprint->SkeletonGeneratedClass;
		}
	}
	return nullptr;
}

FLinearColor UControlRigGraphNode::GetNodeOpacityColor() const
{
	if (URigVMNode* ModelNode = GetModelNode())
	{
		if (Cast<URigVMVariableNode>(ModelNode))
		{
			return FLinearColor::White;
		}

		if(GetInstructionIndex(true) == INDEX_NONE)
		{
			return FLinearColor(0.35f, 0.35f, 0.35f, 0.35f);
		}
	}
	return FLinearColor::White;
}

FLinearColor UControlRigGraphNode::GetNodeTitleColor() const
{
	// return a darkened version of the default node's color
	return CachedTitleColor * GetNodeOpacityColor();
}

FLinearColor UControlRigGraphNode::GetNodeBodyTintColor() const
{
#if WITH_EDITOR
	if(bEnableProfiling)
	{
		return GetNodeProfilingColor();
	}
#endif
	
	return CachedNodeColor * GetNodeOpacityColor();
}

bool UControlRigGraphNode::ShowPaletteIconOnNode() const
{
	if (URigVMNode* ModelNode = GetModelNode())
	{
		return ModelNode->IsEvent() ||
			ModelNode->IsA<URigVMInvokeEntryNode>() ||
			ModelNode->IsA<URigVMFunctionEntryNode>() ||
			ModelNode->IsA<URigVMFunctionReturnNode>() ||
			ModelNode->IsA<URigVMFunctionReferenceNode>() ||
			ModelNode->IsA<URigVMCollapseNode>() ||
			ModelNode->IsA<URigVMUnitNode>() ||
			ModelNode->IsA<URigVMDispatchNode>() ||
			ModelNode->IsLoopNode();
	}
	return false;
}

FSlateIcon UControlRigGraphNode::GetIconAndTint(FLinearColor& OutColor) const
{
	OutColor = FLinearColor::White;

	static FSlateIcon FunctionIcon(FAppStyle::GetAppStyleSetName(), "Kismet.AllClasses.FunctionIcon");
	static FSlateIcon EventIcon(FAppStyle::GetAppStyleSetName(), "GraphEditor.Event_16x");
	static FSlateIcon EntryReturnIcon(FAppStyle::GetAppStyleSetName(), "GraphEditor.Default_16x");
	static FSlateIcon CollapsedNodeIcon(FAppStyle::GetAppStyleSetName(), "GraphEditor.SubGraph_16x");
	static FSlateIcon TemplateNodeIcon("ControlRigEditorStyle", "ControlRig.Template");

	if (URigVMNode* ModelNode = GetModelNode())
	{
		if (ModelNode->IsEvent() || ModelNode->IsA<URigVMInvokeEntryNode>())
		{
			return EventIcon;
		}

		URigVMNode* InnerNode = ModelNode;
		while(const URigVMAggregateNode* AggregateNode = Cast<URigVMAggregateNode>(InnerNode))
		{
			InnerNode = AggregateNode->GetFirstInnerNode();
		}
		if (InnerNode)
		{
			ModelNode = InnerNode;
		}
		else
		{
			if(!ModelNode->HasAnyFlags(RF_NeedLoad))
			{
				const FString Message = FString::Printf(TEXT("Could not find first inner node in aggregate node %s in package %s"), *ModelNode->GetPathName(), *GetPackage()->GetPathName());
				FScriptExceptionHandler::Get().HandleException(ELogVerbosity::Warning, *Message, *FString());
			}
		}

		if (ModelNode->IsA<URigVMFunctionReferenceNode>())
		{ 
			return FunctionIcon;
		}

		if (ModelNode->IsA<URigVMCollapseNode>())
		{
			return CollapsedNodeIcon;
		}

		if (ModelNode->IsA<URigVMFunctionEntryNode>() || 
            ModelNode->IsA<URigVMFunctionReturnNode>())
		{
			return EntryReturnIcon;
		}

		const UScriptStruct* MetadataScriptStruct = nullptr;
		if (const URigVMUnitNode* UnitNode = Cast<URigVMUnitNode>(ModelNode))
		{
			MetadataScriptStruct = UnitNode->GetScriptStruct();
		}
		else if (const URigVMDispatchNode* DispatchNode = Cast<URigVMDispatchNode>(ModelNode))
		{
			MetadataScriptStruct = DispatchNode->GetFactory()->GetScriptStruct();
		}

		if(MetadataScriptStruct && MetadataScriptStruct->HasMetaDataHierarchical(FRigVMStruct::IconMetaName))
		{
			FString IconPath;
			const int32 NumOfIconPathNames = 4;
			
			FName IconPathNames[NumOfIconPathNames] = {
				NAME_None, // StyleSetName
				NAME_None, // StyleName
				NAME_None, // SmallStyleName
				NAME_None  // StatusOverlayStyleName
			};

			// icon path format: StyleSetName|StyleName|SmallStyleName|StatusOverlayStyleName
			// the last two names are optional, see FSlateIcon() for reference
			MetadataScriptStruct->GetStringMetaDataHierarchical(FRigVMStruct::IconMetaName, &IconPath);

			int32 NameIndex = 0;

			while (!IconPath.IsEmpty() && NameIndex < NumOfIconPathNames)
			{
				FString Left;
				FString Right;

				if (!IconPath.Split(TEXT("|"), &Left, &Right))
				{
					Left = IconPath;
				}

				IconPathNames[NameIndex] = FName(*Left);

				NameIndex++;
				IconPath = Right;
			}
			
			return FSlateIcon(IconPathNames[0], IconPathNames[1], IconPathNames[2], IconPathNames[3]);
		}

		if (const URigVMTemplateNode* TemplateNode = Cast<URigVMTemplateNode>(ModelNode))
		{
			if(const FRigVMTemplate* Template = TemplateNode->GetTemplate())
			{
				if(Template->NumPermutations() > 1)
				{
					return TemplateNodeIcon;
				}
			}
		}
	}

	return FunctionIcon;
}

void UControlRigGraphNode::GetNodeContextMenuActions(class UToolMenu* Menu, class UGraphNodeContextMenuContext* Context) const
{
#if WITH_EDITOR
	const UControlRigGraphSchema* Schema = Cast<UControlRigGraphSchema>(GetSchema());
	IControlRigEditorModule::Get().GetContextMenuActions(Schema, Menu, Context);
#endif
}

bool UControlRigGraphNode::IsPinExpanded(const FString& InPinPath)
{
	if (URigVMPin* ModelPin = GetModelPinFromPinPath(InPinPath))
	{
		return ModelPin->IsExpanded();
	}
	return false;
}

void UControlRigGraphNode::DestroyNode()
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if(UControlRigGraph* Graph = Cast<UControlRigGraph>(GetOuter()))
	{
		BreakAllNodeLinks();
		
		UControlRigBlueprint* ControlRigBlueprint = Cast<UControlRigBlueprint>(Graph->GetOuter());
		if(ControlRigBlueprint)
		{
			if(PropertyName_DEPRECATED.IsValid())
			{
				FControlRigBlueprintUtils::RemoveMemberVariableIfNotUsed(ControlRigBlueprint, PropertyName_DEPRECATED, this);
			}
		}
	}

	UEdGraphNode::DestroyNode();
}

void UControlRigGraphNode::PinDefaultValueChanged(UEdGraphPin* Pin)
{
	CopyPinDefaultsToModel(Pin, true, true);
}

void UControlRigGraphNode::CopyPinDefaultsToModel(UEdGraphPin* Pin, bool bUndo, bool bPrintPythonCommand)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if (Pin->Direction != EGPD_Input)
	{
		return;
	}

	const UEdGraphSchema_K2* K2Schema = GetDefault<UEdGraphSchema_K2>();
	if (URigVMPin* ModelPin = FindModelPinFromGraphPin(Pin))
	{
		if (ModelPin->GetSubPins().Num() > 0)
		{
			return;
		}

		FString DefaultValue = Pin->DefaultValue;

		if(DefaultValue.IsEmpty() && (
			Pin->PinType.PinCategory == UEdGraphSchema_K2::PC_Object ||
			Pin->PinType.PinCategory == UEdGraphSchema_K2::PC_SoftObject ||
			Pin->PinType.PinCategory == UEdGraphSchema_K2::AllObjectTypes ||
			Pin->PinType.PinCategory == UEdGraphSchema_K2::PC_Interface
			))
		{
			if(Pin->DefaultObject)
			{
				DefaultValue = Pin->DefaultObject->GetPathName();
			}
		}
		
		if (DefaultValue == FName(NAME_None).ToString() && Pin->PinType.PinSubCategory == UEdGraphSchema_K2::PC_Name)
		{
			DefaultValue = FString();
		}

		if (ModelPin->GetDefaultValue() != DefaultValue)
		{
			if (URigVMController* Controller = GetController())
			{
				Controller->SetPinDefaultValue(ModelPin->GetPinPath(), DefaultValue, false, true, false, bPrintPythonCommand);
			}
		}
	}
}

UControlRigBlueprint* UControlRigGraphNode::GetBlueprint() const
{
	if(UControlRigGraph* Graph = Cast<UControlRigGraph>(GetOuter()))
	{
		return Graph->GetBlueprint();
		if (UControlRigGraph* OuterGraph = Cast<UControlRigGraph>(Graph->GetOuter()))
		{
			return OuterGraph->GetBlueprint();
		}
		return Cast<UControlRigBlueprint>(Graph->GetOuter());
	}
	return nullptr;
}

URigVMGraph* UControlRigGraphNode::GetModel() const
{
	if (UControlRigGraph* Graph = Cast<UControlRigGraph>(GetOuter()))
	{
		return Graph->GetModel();
	}
	return nullptr;
}

URigVMController* UControlRigGraphNode::GetController() const
{
	if (UControlRigGraph* Graph = Cast<UControlRigGraph>(GetOuter()))
	{
		return Graph->GetController();
	}
	return nullptr;
}

URigVMNode* UControlRigGraphNode::GetModelNode() const
{
	UControlRigGraphNode* MutableThis = (UControlRigGraphNode*)this;
	if (CachedModelNode.IsValid())
	{
		if (CachedModelNode.Get()->GetOuter() == GetTransientPackage())
		{
			MutableThis->CachedModelNode.Reset();
		}
		else
		{
			return CachedModelNode.Get();
		}
	}

	if (UControlRigGraph* Graph = Cast<UControlRigGraph>(GetOuter()))
	{
#if WITH_EDITOR

		if (Graph->TemplateController != nullptr)
		{
			MutableThis->CachedModelNode = TWeakObjectPtr<URigVMNode>(Graph->TemplateController->GetGraph()->FindNode(ModelNodePath));
			return MutableThis->CachedModelNode.Get();
		}

#endif

		if (URigVMGraph* Model = GetModel())
		{
			MutableThis->CachedModelNode = TWeakObjectPtr<URigVMNode>(Model->FindNode(ModelNodePath));
			return MutableThis->CachedModelNode.Get();
		}
	}

	return nullptr;
}

FName UControlRigGraphNode::GetModelNodeName() const
{
	if (URigVMNode* ModelNode = GetModelNode())
	{
		return ModelNode->GetFName();
	}
	return NAME_None;
}

URigVMPin* UControlRigGraphNode::GetModelPinFromPinPath(const FString& InPinPath) const
{
	if (TWeakObjectPtr<URigVMPin> const* CachedModelPinPtr = PinPathToModelPin.Find(InPinPath))
	{
		if(CachedModelPinPtr->IsValid())
		{
			URigVMPin* CachedModelPin = CachedModelPinPtr->Get();
			if (!CachedModelPin->HasAnyFlags(RF_Transient) && CachedModelPin->GetNode())
			{
				return CachedModelPin;
			}
		}
	}

	if (const URigVMNode* ModelNode = GetModelNode())
	{
		const FString PinPath = InPinPath.RightChop(ModelNode->GetNodePath().Len() + 1);
		URigVMPin* ModelPin = ModelNode->FindPin(PinPath);
		if (ModelPin)
		{
			UControlRigGraphNode* MutableThis = (UControlRigGraphNode*)this;
			MutableThis->PinPathToModelPin.FindOrAdd(InPinPath) = ModelPin;
		}
		return ModelPin;
	}
	
	return nullptr;
}

void UControlRigGraphNode::HandleAddAggregateElement(const FString& InNodePath)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if (URigVMController* Controller = GetController())
	{
		Controller->AddAggregatePin(InNodePath, FString(), FString(), true, true);
	}	
}

void UControlRigGraphNode::SetupPinDefaultsFromModel(UEdGraphPin* Pin, const URigVMPin* InModelPin)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	if (Pin->Direction != EGPD_Input)
	{
		return;
	}

	if(InModelPin == nullptr)
	{
		InModelPin = FindModelPinFromGraphPin(Pin);
	}

	// remove stale subpins
	Pin->SubPins.Remove(nullptr);

	const UEdGraphSchema_K2* K2Schema = GetDefault<UEdGraphSchema_K2>();
	if (InModelPin && IsValid(InModelPin))
	{
		if (InModelPin->GetSubPins().Num() > 0)
		{
			return;
		}

		FString DefaultValueString = InModelPin->GetDefaultValue();
		if (DefaultValueString.IsEmpty() && InModelPin->GetCPPType() == TEXT("FName"))
		{
			DefaultValueString = FName(NAME_None).ToString();
		}
		K2Schema->GetPinDefaultValuesFromString(Pin->PinType, Pin->GetOwningNodeUnchecked(), DefaultValueString, Pin->DefaultValue, Pin->DefaultObject, Pin->DefaultTextValue);
	}
}

FText UControlRigGraphNode::GetTooltipText() const
{
	if(URigVMNode* ModelNode = GetModelNode())
	{
		return ModelNode->GetToolTipText();
	}
	return FText::FromString(ModelNodePath);
}

void UControlRigGraphNode::InvalidateNodeTitle() const
{
	NodeTitle = FText();
	FullNodeTitle = FText();
	NodeTitleDirtied.Broadcast();
}

bool UControlRigGraphNode::CanCreateUnderSpecifiedSchema(const UEdGraphSchema* InSchema) const
{
	return InSchema->IsA<UControlRigGraphSchema>();
}

void UControlRigGraphNode::AutowireNewNode(UEdGraphPin* FromPin)
{
	DECLARE_SCOPE_HIERARCHICAL_COUNTER_FUNC()

	Super::AutowireNewNode(FromPin);

	const UControlRigGraphSchema* Schema = GetDefault<UControlRigGraphSchema>();
	Schema->AutowireNewNode(this, FromPin);
}

bool UControlRigGraphNode::IsSelectedInEditor() const
{
	URigVMNode* ModelNode = GetModelNode();
	if (ModelNode)
	{
		return ModelNode->IsSelected();
	}
	return false;
}

bool UControlRigGraphNode::ShouldDrawNodeAsControlPointOnly(int32& OutInputPinIndex, int32& OutOutputPinIndex) const
{
	if (URigVMRerouteNode* Reroute = Cast<URigVMRerouteNode>(GetModelNode()))
	{
		if (!Reroute->GetShowsAsFullNode())
		{
			if (Pins.Num() >= 2)
			{
				OutInputPinIndex = 0;
				OutOutputPinIndex = Pins.Num()/2;

				if (Pins[OutOutputPinIndex]->Direction != EGPD_Output || Pins[OutOutputPinIndex]->ParentPin != nullptr)
				{
					for (int32 i=0; i<Pins.Num(); ++i)
					{
						if (Pins[i]->Direction == EGPD_Output && Pins[i]->ParentPin == nullptr)
						{
							OutOutputPinIndex = i;
							break;
						}
					}
				}
				return true;
			}
		}
	}
	return false;
}

void UControlRigGraphNode::BeginDestroy()
{
	for(UEdGraphPin* Pin : Pins)
	{
		Pin->SubPins.Remove(nullptr);
	}
	Super::BeginDestroy();
}

FEdGraphPinType UControlRigGraphNode::GetPinTypeForModelPin(const URigVMPin* InModelPin)
{
	FEdGraphPinType PinType = RigVMTypeUtils::PinTypeFromCPPType(*InModelPin->GetCPPType(), InModelPin->GetCPPTypeObject());
	PinType.bIsConst = InModelPin->IsDefinedAsConstant();
	return PinType;
}

void UControlRigGraphNode::ConfigurePin(UEdGraphPin* EdGraphPin, const URigVMPin* ModelPin)
{
	const bool bConnectable =
		ModelPin->GetDirection() == ERigVMPinDirection::Input ||
		ModelPin->GetDirection() == ERigVMPinDirection::Output || 
		ModelPin->GetDirection() == ERigVMPinDirection::IO;

	// hide sub-pins on a compacted (knot) reroute node
	bool bHidden = ModelPin->GetDirection() == ERigVMPinDirection::Hidden;
	if(!bHidden && !ModelPin->IsRootPin())
	{
		if(const URigVMRerouteNode* RerouteNode = Cast<URigVMRerouteNode>(ModelPin->GetNode()))
		{
			bHidden = !RerouteNode->GetShowsAsFullNode();
		}
	}

	EdGraphPin->bHidden = bHidden;
	EdGraphPin->PinFriendlyName = FText::FromName(ModelPin->GetDisplayName());
	EdGraphPin->bNotConnectable = !bConnectable  || ModelPin->IsFixedSizeArray();
	EdGraphPin->bOrphanedPin = ModelPin->IsOrphanPin() ? 1 : 0; 
	EdGraphPin->bDisplayAsMutableRef = ModelPin->IsWildCard();
}

TArray<URigVMPin*>& UControlRigGraphNode::PinListForPin(const URigVMPin* InModelPin)
{
	if(IsValid(InModelPin))
	{
		if(InModelPin->IsExecuteContext() && InModelPin->GetDirection() == ERigVMPinDirection::IO)
		{
			return ExecutePins;
		}
		if(InModelPin->GetDirection() == ERigVMPinDirection::Input || InModelPin->GetDirection() == ERigVMPinDirection::Visible)
		{
			return InputPins;
		}
		if(InModelPin->GetDirection() == ERigVMPinDirection::IO)
		{
			return InputOutputPins;
		}
		if(InModelPin->GetDirection() == ERigVMPinDirection::Output)
		{
			return OutputPins;
		}

		checkNoEntry();
	}
	static TArray<URigVMPin*> EmptyList;
	return EmptyList;
}

#undef LOCTEXT_NAMESPACE