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Good type-to-text routine in MCP

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This commit is contained in:
jyelon
2026-03-15 02:53:25 -04:00
parent 57f72d4a0e
commit 6b21fb9674
14 changed files with 171 additions and 131 deletions
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BIN
Content/Tangibles/TAN_Character.uasset LFS
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3
Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/Blueprint_ChangeFunctionParameterType.h
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@@ -5,6 +5,7 @@
#include "MCPFetcher.h"
#include "MCPUtils.h"
#include "MCPServer.h"
#include "MCPTypes.h"
#include "Engine/Blueprint.h"
#include "EdGraph/EdGraph.h"
#include "EdGraph/EdGraphPin.h"
@@ -153,7 +154,7 @@ public:
bool bSaved = MCPUtils::SaveBlueprintPackage(BP);
UMCPServer::Printf(TEXT("Changed '%s' to %s. Save %s.\n"),
*ParamName, *MCPUtils::FormatPinType(NewPinType),
*ParamName, *UMCPTypes::TypeToText(NewPinType),
bSaved ? TEXT("succeeded") : TEXT("failed"));
}
};

7
Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/Blueprint_ChangeVariableType.h
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@@ -2,6 +2,7 @@
#include "CoreMinimal.h"
#include "MCPServer.h"
#include "MCPTypes.h"
#include "MCPHandler.h"
#include "MCPFetcher.h"
#include "MCPUtils.h"
@@ -116,8 +117,8 @@ public:
{
UMCPServer::Printf(TEXT("Dry run: would change %s from %s to %s\n"),
*MCPUtils::FormatName(*Found),
*MCPUtils::FormatPinType(Found->VarType),
*MCPUtils::FormatPinType(NewPinType));
*UMCPTypes::TypeToText(Found->VarType),
*UMCPTypes::TypeToText(NewPinType));
if (bHasAffected)
{
UMCPServer::Print(TEXT("Affected nodes:\n"));
@@ -133,7 +134,7 @@ public:
bool bSaved = MCPUtils::SaveBlueprintPackage(BP);
UMCPServer::Printf(TEXT("Changed %s to %s.%s\n"),
*MCPUtils::FormatName(*Found),
*MCPUtils::FormatPinType(NewPinType),
*UMCPTypes::TypeToText(NewPinType),
bSaved ? TEXT("") : TEXT(" WARNING: save failed."));
if (bHasAffected)

3
Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/Blueprint_Dump.h
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@@ -2,6 +2,7 @@
#include "CoreMinimal.h"
#include "MCPServer.h"
#include "MCPTypes.h"
#include "MCPHandler.h"
#include "MCPFetcher.h"
#include "MCPUtils.h"
@@ -65,7 +66,7 @@ public:
for (const FBPVariableDescription& V : BP->NewVariables)
{
UMCPServer::Printf(TEXT(" %s %s"),
*MCPUtils::FormatPinType(V.VarType),
*UMCPTypes::TypeToText(V.VarType),
*MCPUtils::FormatName(V));
if (!V.DefaultValue.IsEmpty())
UMCPServer::Printf(TEXT(" = %s"), *V.DefaultValue);

3
Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/Blueprint_ListEventDispatchers.h
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@@ -2,6 +2,7 @@
#include "CoreMinimal.h"
#include "MCPServer.h"
#include "MCPTypes.h"
#include "MCPHandler.h"
#include "MCPFetcher.h"
#include "MCPUtils.h"
@@ -57,7 +58,7 @@ public:
if (!bFirst) UMCPServer::Print(TEXT(", "));
bFirst = false;
UMCPServer::Printf(TEXT("%s %s"),
*MCPUtils::FormatPinType(PinInfo->PinType),
*UMCPTypes::TypeToText(PinInfo->PinType),
*PinInfo->PinName.ToString());
}
break; // only need the first entry node

8
Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/GraphNode_PrintPinType.h
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@@ -45,8 +45,12 @@ private:
if (!Node->bReadOnly)
{
UObject *SCO = Node->GetPinTypeNoResolve().PinSubCategoryObject.Get();
FString Path = SCO ? SCO->GetPathName() : *Node->GetCachedAssetData().GetObjectPathString();
UMCPServer::Printf(TEXT("%s%s --- %s\n"), *Category, *Desc, *Path);
if (SCO) {
UMCPServer::Printf(TEXT("SCO %s %s\n"), *SCO->GetPackage()->GetName(), *SCO->GetName());
} else {
auto cad = Node->GetCachedAssetData();
UMCPServer::Printf(TEXT("CAD %s %s\n"), *cad.PackageName.ToString(), *cad.AssetName.ToString());
}
}
FString ChildCategory = FString::Printf(TEXT("%s%s|"), *Category, *Desc);

5
Plugins/BlueprintMCP/Source/BlueprintMCP/Private/BlueprintExporter.cpp
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@@ -1,4 +1,5 @@
#include "BlueprintExporter.h"
#include "MCPTypes.h"
#include "MCPUtils.h"
#include "Engine/Blueprint.h"
#include "EdGraph/EdGraph.h"
@@ -211,7 +212,7 @@ void FlxBlueprintExporter::EmitNode(UEdGraphNode* Node)
if (Pin->bHidden) continue;
Output.Appendf(TEXT(" input %s %s = %s\n"),
*MCPUtils::FormatPinType(Pin),
*UMCPTypes::TypeToText(Pin->PinType),
*MCPUtils::FormatName(Pin),
*FormatPinSource(Pin));
}
@@ -290,7 +291,7 @@ void FlxBlueprintExporter::EmitLocalVariables()
{
FString Default = Var.DefaultValue.IsEmpty() ? TEXT("<default>") : Var.DefaultValue;
Output.Appendf(TEXT("local %s %s = %s\n"),
*MCPUtils::FormatPinType(Var.VarType),
*UMCPTypes::TypeToText(Var.VarType),
*MCPUtils::FormatName(Var),
*Default);
}

1
Plugins/BlueprintMCP/Source/BlueprintMCP/Private/MCPAssets.cpp
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@@ -57,7 +57,6 @@ bool MCPAssetsBase::Info()
// Query the asset registry
IAssetRegistry& AR = FModuleManager::LoadModuleChecked<FAssetRegistryModule>("AssetRegistry").Get();
while (AR.IsLoadingAssets()) FPlatformProcess::Sleep(0.1f);
TArray<FAssetData> Candidates;
AR.GetAssets(ConfigureFilter(), Candidates);

6
Plugins/BlueprintMCP/Source/BlueprintMCP/Private/MCPServer.cpp
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@@ -398,6 +398,12 @@ void UMCPServer::ClientThreadFunc(UMCPServer* Server, TSharedPtr<FClientConnecti
if (Line.IsEmpty()) continue;
// Wait for the asset registry to finish its initial scan.
{
IAssetRegistry& AR = FModuleManager::LoadModuleChecked<FAssetRegistryModule>("AssetRegistry").Get();
while (AR.IsLoadingAssets()) FPlatformProcess::Sleep(0.25f);
}
// Enqueue the line for game-thread processing
TSharedPtr<UMCPServer::FPendingMessage> Msg = MakeShared<UMCPServer::FPendingMessage>();
Msg->Line = Line;

200
Plugins/BlueprintMCP/Source/BlueprintMCP/Private/MCPTypes.cpp
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@@ -1,140 +1,166 @@
#include "MCPTypes.h"
#include "Editor.h"
#include "EdGraphSchema_K2.h"
#include "UObject/UObjectIterator.h"
// ---------------------------------------------------------------------------
// Helper: format a UField name with module prefix if not in /Script/Engine.
// Choose Short Name
// ---------------------------------------------------------------------------
static FString FormatFieldName(UField* Field, const FString& TypePrefix)
FString UMCPTypes::ChooseShortName(UObject* Obj)
{
// Package name is /Script/ModuleName
FString ModuleName = Field->GetOutermost()->GetName().Mid(8);
if (!Cast<UScriptStruct>(Obj) && !Cast<UClass>(Obj) && !Cast<UEnum>(Obj))
return FString();
FString Name = TypePrefix + Field->GetName();
if (ModuleName != TEXT("Engine"))
return ModuleName + TEXT("::") + Name;
return Name;
FString Path = Obj->GetPathName();
FString *OldShort = PathToShort.Find(Path);
if (OldShort != nullptr) return *OldShort;
FString Name = Obj->GetName();
if (Name.EndsWith(TEXT("_C"))) Name.LeftChopInline(2);
FString Lower = Name.ToLower();
if (!ShortToPath.Contains(Lower))
{
ShortToPath.Add(Lower, Path);
PathToShort.Add(Path, Name);
return Name;
}
for (int32 i = 2; ; ++i)
{
FString NumberedLower = FString::Printf(TEXT("%s%d"), *Lower, i);
if (!ShortToPath.Contains(NumberedLower))
{
FString NumberedName = FString::Printf(TEXT("%s%d"), *Name, i);
ShortToPath.Add(NumberedLower, Path);
PathToShort.Add(Path, NumberedName);
return NumberedName;
}
}
}
static FString FormatClassName(UClass* Class)
void UMCPTypes::ChooseShortNames(UPackage* Package)
{
FString Prefix = Class->IsChildOf(AActor::StaticClass()) ? TEXT("A") : TEXT("U");
return FormatFieldName(Class, Prefix);
}
if (Package == nullptr) return;
static FString FormatStructName(UScriptStruct* Struct)
{
return FormatFieldName(Struct, TEXT("F"));
}
static FString FormatEnumName(UEnum* Enum)
{
return FormatFieldName(Enum, TEXT("E"));
ForEachObjectWithPackage(Package, [&](UObject* Obj)
{
ChooseShortName(Obj);
return true;
}, false);
}
// ---------------------------------------------------------------------------
// TypeToText
// ---------------------------------------------------------------------------
static FString TerminalToText(const FEdGraphPinType& PinType)
FString UMCPTypes::TypeToTextInner(FName Category, FName SubCategory, UObject* SubCategoryObject)
{
const FName& Cat = PinType.PinCategory;
UObject* SubObj = PinType.PinSubCategoryObject.Get();
if (Category == UEdGraphSchema_K2::PC_Boolean) return TEXT("bool");
if (Category == UEdGraphSchema_K2::PC_Int) return TEXT("int32");
if (Category == UEdGraphSchema_K2::PC_Int64) return TEXT("int64");
if (Category == UEdGraphSchema_K2::PC_Name) return TEXT("Name");
if (Category == UEdGraphSchema_K2::PC_String) return TEXT("String");
if (Category == UEdGraphSchema_K2::PC_Text) return TEXT("Text");
if (Cat == UEdGraphSchema_K2::PC_Boolean) return TEXT("bool");
if (Cat == UEdGraphSchema_K2::PC_Int) return TEXT("int32");
if (Cat == UEdGraphSchema_K2::PC_Int64) return TEXT("int64");
if (Cat == UEdGraphSchema_K2::PC_Name) return TEXT("FName");
if (Cat == UEdGraphSchema_K2::PC_String) return TEXT("FString");
if (Cat == UEdGraphSchema_K2::PC_Text) return TEXT("FText");
if (Cat == UEdGraphSchema_K2::PC_Real)
if (Category == UEdGraphSchema_K2::PC_Real)
{
if (PinType.PinSubCategory == UEdGraphSchema_K2::PC_Float)
if (SubCategory == UEdGraphSchema_K2::PC_Float)
return TEXT("float");
return TEXT("double");
}
if (Cat == UEdGraphSchema_K2::PC_Byte)
if (Category == UEdGraphSchema_K2::PC_Byte)
{
if (UEnum* Enum = Cast<UEnum>(SubObj))
return FormatEnumName(Enum);
if (SubCategoryObject)
return ChooseShortName(SubCategoryObject);
return TEXT("uint8");
}
if (Cat == UEdGraphSchema_K2::PC_Enum)
if (Category == UEdGraphSchema_K2::PC_Enum)
{
if (UEnum* Enum = Cast<UEnum>(SubObj))
return FormatEnumName(Enum);
return TEXT("uint8");
}
if (Cat == UEdGraphSchema_K2::PC_Struct)
{
if (UScriptStruct* Struct = Cast<UScriptStruct>(SubObj))
return FormatStructName(Struct);
if (SubCategoryObject)
return ChooseShortName(SubCategoryObject);
return FString();
}
if (Cat == UEdGraphSchema_K2::PC_Object)
if (SubCategoryObject)
{
if (UClass* Class = Cast<UClass>(SubObj))
return FormatClassName(Class) + TEXT("*");
return FString();
}
if (Cat == UEdGraphSchema_K2::PC_Class)
{
if (UClass* Class = Cast<UClass>(SubObj))
return FString::Printf(TEXT("TSubclassOf<%s>"), *FormatClassName(Class));
return FString();
}
if (Cat == UEdGraphSchema_K2::PC_SoftObject)
{
if (UClass* Class = Cast<UClass>(SubObj))
return FString::Printf(TEXT("TSoftObjectPtr<%s>"), *FormatClassName(Class));
return FString();
}
if (Cat == UEdGraphSchema_K2::PC_SoftClass)
{
if (UClass* Class = Cast<UClass>(SubObj))
return FString::Printf(TEXT("TSoftClassPtr<%s>"), *FormatClassName(Class));
return FString();
}
if (Cat == UEdGraphSchema_K2::PC_Interface)
{
if (UClass* Class = Cast<UClass>(SubObj))
return FString::Printf(TEXT("TScriptInterface<%s>"), *FormatClassName(Class));
return FString();
FString Short = ChooseShortName(SubCategoryObject);
if (Short.IsEmpty()) return FString();
if (Category == UEdGraphSchema_K2::PC_Struct)
return Short;
if (Category == UEdGraphSchema_K2::PC_Object)
return Short;
if (Category == UEdGraphSchema_K2::PC_Class)
return FString::Printf(TEXT("Class<%s>"), *Short);
if (Category == UEdGraphSchema_K2::PC_SoftObject)
return FString::Printf(TEXT("Soft<%s>"), *Short);
if (Category == UEdGraphSchema_K2::PC_SoftClass)
return FString::Printf(TEXT("SoftClass<%s>"), *Short);
if (Category == UEdGraphSchema_K2::PC_Interface)
return Short;
}
return FString();
}
FString MCPTypes::TypeToText(const FEdGraphPinType& PinType)
FString UMCPTypes::TypeToText(const FEdGraphPinType& PinType)
{
FString Inner = TerminalToText(PinType);
UMCPTypes* Types = GEditor->GetEditorSubsystem<UMCPTypes>();
if (!Types) return FString();
FString Inner = Types->TypeToTextInner(PinType.PinCategory, PinType.PinSubCategory, PinType.PinSubCategoryObject.Get());
if (Inner.IsEmpty())
return FString();
if (PinType.IsArray())
return FString::Printf(TEXT("TArray<%s>"), *Inner);
return FString::Printf(TEXT("Array<%s>"), *Inner);
if (PinType.IsSet())
return FString::Printf(TEXT("TSet<%s>"), *Inner);
return FString::Printf(TEXT("Set<%s>"), *Inner);
if (PinType.IsMap())
{
FEdGraphPinType ValueType;
ValueType.PinCategory = PinType.PinValueType.TerminalCategory;
ValueType.PinSubCategory = PinType.PinValueType.TerminalSubCategory;
ValueType.PinSubCategoryObject = PinType.PinValueType.TerminalSubCategoryObject;
FString ValueInner = TerminalToText(ValueType);
FString ValueInner = Types->TypeToTextInner(
PinType.PinValueType.TerminalCategory,
PinType.PinValueType.TerminalSubCategory,
PinType.PinValueType.TerminalSubCategoryObject.Get());
if (ValueInner.IsEmpty())
return FString();
return FString::Printf(TEXT("TMap<%s, %s>"), *Inner, *ValueInner);
return FString::Printf(TEXT("Map<%s, %s>"), *Inner, *ValueInner);
}
return Inner;
}
// ---------------------------------------------------------------------------
// Subsystem lifecycle
// ---------------------------------------------------------------------------
void UMCPTypes::Initialize(FSubsystemCollectionBase& Collection)
{
Super::Initialize(Collection);
// Collect all packages and sort by name for stable short-name assignment.
TArray<UPackage*> Packages;
for (TObjectIterator<UPackage> It; It; ++It)
Packages.Add(*It);
Packages.Sort([](const UPackage& A, const UPackage& B) { return A.GetName() < B.GetName(); });
// Scan priority packages first, then everything else in sorted order.
ChooseShortNames(FindPackage(nullptr, TEXT("/Script/CoreUObject")));
ChooseShortNames(FindPackage(nullptr, TEXT("/Script/Engine")));
ChooseShortNames(FindPackage(nullptr, TEXT("/Script/Integration")));
for (UPackage* Pkg : Packages)
ChooseShortNames(Pkg);
UE_LOG(LogTemp, Display, TEXT("MCPTypes: Registered %d types"), ShortToPath.Num());
}
void UMCPTypes::Deinitialize()
{
Super::Deinitialize();
}

15
Plugins/BlueprintMCP/Source/BlueprintMCP/Private/MCPUtils.cpp
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@@ -251,21 +251,6 @@ bool MCPUtils::Identifies(const FString &Name, const UEdGraphNode* Node)
// Formatting other things
// ============================================================
FString MCPUtils::FormatPinType(const FEdGraphPinType& PinType)
{
if (UObject* SubObj = PinType.PinSubCategoryObject.Get())
{
return SubObj->GetName();
}
FString Type = PinType.PinCategory.ToString();
Type[0] = FChar::ToUpper(Type[0]);
return Type;
}
FString MCPUtils::FormatPinType(UEdGraphPin* Pin)
{
return FormatPinType(Pin->PinType);
}
FString MCPUtils::FormatNodeTitle(const UEdGraphNode *Node)
{

43
Plugins/BlueprintMCP/Source/BlueprintMCP/Public/MCPTypes.h
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@@ -1,10 +1,12 @@
#pragma once
#include "CoreMinimal.h"
#include "EditorSubsystem.h"
#include "EdGraph/EdGraphPin.h"
#include "MCPTypes.generated.h"
// ---------------------------------------------------------------------------
// MCPTypes — converts between FEdGraphPinType and a concise C++-like string.
// UMCPTypes — converts between FEdGraphPinType and a concise C++-like string.
//
// The text format mirrors GetCPPType where possible:
// bool, uint8, int32, int64, float, double, FName, FString, FText
@@ -20,27 +22,42 @@
// TypeToText and TextToType are inverses of each other.
// ---------------------------------------------------------------------------
class MCPTypes
UCLASS()
class UMCPTypes : public UEditorSubsystem
{
GENERATED_BODY()
public:
// Convert an FEdGraphPinType to a concise string.
// Returns empty string on failure.
FString TypeToText(const FEdGraphPinType& PinType);
virtual void Initialize(FSubsystemCollectionBase& Collection) override;
virtual void Deinitialize() override;
// Convert a pin type to a type string. Returns empty string on failure.
static FString TypeToText(const FEdGraphPinType& PinType);
// Convert a concise string back to an FEdGraphPinType.
// Returns true on success. Prints error via UMCPServer on failure.
bool TextToType(const FString& Text, FEdGraphPinType& OutPinType);
static bool TextToType(const FString& Text, FEdGraphPinType& OutPinType);
// Same as TextToType, but does not print an error message on failure.
bool TryTextToType(const FString& Text, FEdGraphPinType& OutPinType);
static bool TryTextToType(const FString& Text, FEdGraphPinType& OutPinType);
private:
FString TypeToTextInner(FName Category, FName SubCategory, UObject* SubCategoryObject);
// Chooses a short name for the specified type, making sure not to
// choose the same name for two classes. If the object already has
// a short name, return it. If it's not a class, struct, enum, or
// interface, return empty string.
FString ChooseShortName(UObject* Obj);
// Choose short names for every type in the package.
void ChooseShortNames(UPackage* Package);
// Short name registry: bidirectional mapping between short names and full paths.
TMap<FString, FString> ShortToPath; // e.g. "vector" -> "/Script/CoreUObject.Vector"
TMap<FString, FString> PathToShort; // e.g. "/Script/CoreUObject.Vector" -> "Vector"
// Parser state (used by TextToType)
TArray<FString> Tokens;
int32 Cursor = 0;
};

2
Plugins/BlueprintMCP/Source/BlueprintMCP/Public/MCPUtils.h
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@@ -93,8 +93,6 @@ public:
////////////////////////////////////////////////////////
static FString FormatPinType(const FEdGraphPinType& PinType);
static FString FormatPinType(UEdGraphPin* Pin);
static FString FormatNodeTitle(const UEdGraphNode *Node);
// ----- Enum helpers -----

2
Source/Integration/Tangible.cpp
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@@ -266,7 +266,7 @@ bool UlxTangible::AnimationStepIsFinished(AActor *target, const FlxAnimationStep
UlxScriptedAnimations *UlxTangible::GetScriptedAnimations(AActor *Target)
{
UlxTangible *tan = GetActorTangibleOrLog(Target);
UlxTangible *tan = GetActorTangibleQuiet(Target);
if (tan == nullptr) return nullptr;
if (tan->ScriptedAnimations == nullptr)
{