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303 lines
13 KiB
C++
303 lines
13 KiB
C++
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
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#include "CoreMinimal.h"
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#include "UObject/Object.h"
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#include "UObject/UnrealType.h"
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#include "BlueprintCompilerCppBackendUtils.h"
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#include "Blueprint/UserWidget.h"
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#include "Blueprint/WidgetBlueprintGeneratedClass.h"
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#include "Animation/WidgetAnimation.h"
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#include "Blueprint/WidgetTree.h"
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#include "Evaluation/MovieSceneSegment.h"
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#include "Evaluation/MovieSceneTrackImplementation.h"
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#include "Evaluation/MovieSceneEvalTemplate.h"
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#include "Compilation/MovieSceneCompiler.h"
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void FBackendHelperUMG::WidgetFunctionsInHeader(FEmitterLocalContext& Context)
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{
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if (Cast<UWidgetBlueprintGeneratedClass>(Context.GetCurrentlyGeneratedClass()))
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{
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Context.Header.AddLine(FString::Printf(TEXT("virtual void %s(TArray<FName>& SlotNames) const override;"), GET_FUNCTION_NAME_STRING_CHECKED(UUserWidget, GetSlotNames)));
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Context.Header.AddLine(FString::Printf(TEXT("virtual void %s(const class ITargetPlatform* TargetPlatform) override;"), GET_FUNCTION_NAME_STRING_CHECKED(UUserWidget, PreSave)));
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Context.Header.AddLine(TEXT("virtual void InitializeNativeClassData() override;"));
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}
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}
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void FBackendHelperUMG::AdditionalHeaderIncludeForWidget(FEmitterLocalContext& Context)
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{
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if (!Context.NativizationOptions.bExcludeMonolithicHeaders
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&& Cast<UWidgetBlueprintGeneratedClass>(Context.GetCurrentlyGeneratedClass()))
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{
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Context.Header.AddLine(TEXT("#include \"Runtime/UMG/Public/UMG.h\""));
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}
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}
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void FBackendHelperUMG::CreateClassSubobjects(FEmitterLocalContext& Context, bool bCreate, bool bInitialize)
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{
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if (UWidgetBlueprintGeneratedClass* WidgetClass = Cast<UWidgetBlueprintGeneratedClass>(Context.GetCurrentlyGeneratedClass()))
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{
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// Currently nativization does not support widget templates. This method will need to be revised if that changes.
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check(!WidgetClass->HasTemplate());
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// Child widgets may actually use the widget tree from a parent class.
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// - @see UUserWidget::Initialize()
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WidgetClass = WidgetClass->FindWidgetTreeOwningClass();
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// Initialize the WidgetTree only if it's owned by the current widget class.
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if (WidgetClass == Context.GetCurrentlyGeneratedClass())
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{
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if (WidgetClass->WidgetTree)
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{
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ensure(WidgetClass->WidgetTree->GetOuter() == Context.GetCurrentlyGeneratedClass());
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FEmitDefaultValueHelper::HandleClassSubobject(Context, WidgetClass->WidgetTree, FEmitterLocalContext::EClassSubobjectList::MiscConvertedSubobjects, bCreate, bInitialize);
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}
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for (UWidgetAnimation* Anim : WidgetClass->Animations)
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{
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ensure(Anim->GetOuter() == Context.GetCurrentlyGeneratedClass());
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// We need the same regeneration like for cooking. See UMovieSceneSequence::Serialize
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FMovieSceneSequencePrecompiledTemplateStore Store;
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FMovieSceneCompiler::Compile(*Anim, Store);
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FEmitDefaultValueHelper::HandleClassSubobject(Context, Anim, FEmitterLocalContext::EClassSubobjectList::MiscConvertedSubobjects, bCreate, bInitialize);
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}
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}
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}
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}
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void FBackendHelperUMG::EmitWidgetInitializationFunctions(FEmitterLocalContext& Context)
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{
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if (UWidgetBlueprintGeneratedClass* WidgetClass = Cast<UWidgetBlueprintGeneratedClass>(Context.GetCurrentlyGeneratedClass()))
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{
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Context.ResetPropertiesForInaccessibleStructs();
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const FString CppClassName = FEmitHelper::GetCppName(WidgetClass);
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auto GenerateLocalProperty = [](FEmitterLocalContext& InContext, UProperty* InProperty, const uint8* DataPtr) -> FString
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{
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check(InProperty && DataPtr);
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const FString NativeName = InContext.GenerateUniqueLocalName();
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const uint32 CppTemplateTypeFlags = EPropertyExportCPPFlags::CPPF_CustomTypeName | EPropertyExportCPPFlags::CPPF_BlueprintCppBackend | EPropertyExportCPPFlags::CPPF_NoConst | EPropertyExportCPPFlags::CPPF_NoRef;
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const FString Target = InContext.ExportCppDeclaration(InProperty, EExportedDeclaration::Local, CppTemplateTypeFlags, FEmitterLocalContext::EPropertyNameInDeclaration::Skip);
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InContext.AddLine(FString::Printf(TEXT("%s %s;"), *Target, *NativeName));
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FEmitDefaultValueHelper::InnerGenerate(InContext, InProperty, NativeName, DataPtr, nullptr);
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return NativeName;
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};
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{ // GetSlotNames
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Context.AddLine(FString::Printf(TEXT("void %s::%s(TArray<FName>& SlotNames) const"), *CppClassName, GET_FUNCTION_NAME_STRING_CHECKED(UUserWidget, GetSlotNames)));
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Context.AddLine(TEXT("{"));
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Context.IncreaseIndent();
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const FString LocalNativeName = GenerateLocalProperty(Context, FindFieldChecked<UArrayProperty>(UWidgetBlueprintGeneratedClass::StaticClass(), TEXT("NamedSlots")), reinterpret_cast<const uint8*>(&WidgetClass->NamedSlots));
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Context.AddLine(FString::Printf(TEXT("SlotNames.Append(%s);"), *LocalNativeName));
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Context.DecreaseIndent();
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Context.AddLine(TEXT("}"));
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}
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{ // InitializeNativeClassData
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Context.AddLine(FString::Printf(TEXT("void %s::InitializeNativeClassData()"), *CppClassName));
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Context.AddLine(TEXT("{"));
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Context.IncreaseIndent();
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// Child widgets may actually use the widget tree from a parent class.
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// - @see UUserWidget::Initialize()
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UWidgetBlueprintGeneratedClass* WidgetTreeOwningClass = WidgetClass->FindWidgetTreeOwningClass();
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// If we have a valid WidgetTree instance, emit code to initialize the widget using the owning class.
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if (WidgetTreeOwningClass->WidgetTree != nullptr)
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{
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FString WidgetClassStr;
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FString WidgetTreeStr;
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if (WidgetClass == WidgetTreeOwningClass)
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{
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// Simple case - WidgetTree instance is owned by the current class.
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WidgetClassStr = TEXT("GetClass()");
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// This object was already created as a class-owned subobject and mapped to the 'WidgetTree' value.
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// - @see CreateClassSubobjects()
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WidgetTreeStr = Context.FindGloballyMappedObject(WidgetClass->WidgetTree, UWidgetTree::StaticClass());
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}
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else
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{
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// Emit code to assign the owning class to a local variable.
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WidgetClassStr = Context.GenerateUniqueLocalName();
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Context.AddLine(FString::Printf(TEXT("UClass* %s = %s;"),
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*WidgetClassStr,
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*Context.FindGloballyMappedObject(WidgetTreeOwningClass, UClass::StaticClass(), true)));
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// Emit code to locate and assign the owning class's WidgetTree instance to a local variable. This will have been created as part of the owning class's ctor, but note
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// that we have to look it up by name/outer because the converted class is a UDynamicClass and not a UWidgetBlueprintGeneratedClass, so there is no 'WidgetTree' member.
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WidgetTreeStr = Context.GenerateUniqueLocalName();
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Context.AddLine(FString::Printf(TEXT("UWidgetTree* %s = CastChecked<UWidgetTree>(StaticFindObjectFast(UWidgetTree::StaticClass(), %s, TEXT(\"WidgetTree\")));"),
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*WidgetTreeStr,
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*WidgetClassStr));
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}
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ensure(!WidgetTreeStr.IsEmpty());
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ensure(!WidgetClassStr.IsEmpty());
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const FString AnimationsArrayNativeName = GenerateLocalProperty(Context, FindFieldChecked<UArrayProperty>(UWidgetBlueprintGeneratedClass::StaticClass(), TEXT("Animations")), reinterpret_cast<const uint8*>(&WidgetTreeOwningClass->Animations));
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const FString BindingsArrayNativeName = GenerateLocalProperty(Context, FindFieldChecked<UArrayProperty>(UWidgetBlueprintGeneratedClass::StaticClass(), TEXT("Bindings")), reinterpret_cast<const uint8*>(&WidgetTreeOwningClass->Bindings));
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Context.AddLine(FString::Printf(TEXT("UWidgetBlueprintGeneratedClass::%s(this, %s, %s, %s, %s, %s, %s);")
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, GET_FUNCTION_NAME_STRING_CHECKED(UWidgetBlueprintGeneratedClass, InitializeWidgetStatic)
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, *WidgetClassStr
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, WidgetTreeOwningClass->HasTemplate() ? TEXT("true") : TEXT("false")
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, WidgetTreeOwningClass->bAllowDynamicCreation ? TEXT("true") : TEXT("false")
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, *WidgetTreeStr
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, *AnimationsArrayNativeName
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, *BindingsArrayNativeName));
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}
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Context.DecreaseIndent();
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Context.AddLine(TEXT("}"));
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}
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// PreSave
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Context.AddLine(FString::Printf(TEXT("void %s::%s(const class ITargetPlatform* TargetPlatform)"), *CppClassName, GET_FUNCTION_NAME_STRING_CHECKED(UUserWidget, PreSave)));
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Context.AddLine(TEXT("{"));
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Context.IncreaseIndent();
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Context.AddLine(FString::Printf(TEXT("Super::%s(TargetPlatform);"), GET_FUNCTION_NAME_STRING_CHECKED(UObject, PreSave)));
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Context.AddLine(TEXT("TArray<FName> LocalNamedSlots;"));
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Context.AddLine(FString::Printf(TEXT("%s(LocalNamedSlots);"), GET_FUNCTION_NAME_STRING_CHECKED(UUserWidget, GetSlotNames)));
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Context.AddLine(TEXT("RemoveObsoleteBindings(LocalNamedSlots);")); //RemoveObsoleteBindings is protected - no check
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Context.DecreaseIndent();
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Context.AddLine(TEXT("}"));
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}
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}
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bool FBackendHelperUMG::SpecialStructureConstructorUMG(const UStruct* Struct, const uint8* ValuePtr, /*out*/ FString* OutResult)
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{
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check(ValuePtr || !OutResult);
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auto FrameNumberRangeBoundConstructorLambda = [](const TRangeBound<FFrameNumber>& InRangeBound, const FFrameNumber& InRangeBoundValue) -> FString
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{
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if (InRangeBound.IsExclusive())
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{
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return FString::Printf(TEXT("TRangeBound<FFrameNumber>::Exclusive(%d)"), InRangeBoundValue.Value);
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}
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else if (InRangeBound.IsInclusive())
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{
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return FString::Printf(TEXT("TRangeBound<FFrameNumber>::Inclusive(%d)"), InRangeBoundValue.Value);
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}
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else
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{
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return FString::Printf(TEXT("TRangeBound<FFrameNumber>::Open()"));
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}
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};
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if (FSectionEvaluationData::StaticStruct() == Struct)
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{
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if (OutResult)
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{
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const FSectionEvaluationData* SectionEvaluationData = reinterpret_cast<const FSectionEvaluationData*>(ValuePtr);
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if (SectionEvaluationData->ForcedTime == TNumericLimits<int32>::Lowest())
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{
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*OutResult = FString::Printf(TEXT("FSectionEvaluationData(%d, ESectionEvaluationFlags(0x%02x))")
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, SectionEvaluationData->ImplIndex
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, (uint8)SectionEvaluationData->Flags);
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}
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else
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{
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*OutResult = FString::Printf(TEXT("FSectionEvaluationData(%d, %d)")
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, SectionEvaluationData->ImplIndex
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, SectionEvaluationData->ForcedTime.Value);
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}
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}
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return true;
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}
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if (FMovieSceneSegment::StaticStruct() == Struct)
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{
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if (OutResult)
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{
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const FMovieSceneSegment* MovieSceneSegment = reinterpret_cast<const FMovieSceneSegment*>(ValuePtr);
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FString SegmentsInitializerList;
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for (const FSectionEvaluationData& SectionEvaluationData : MovieSceneSegment->Impls)
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{
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if (!SegmentsInitializerList.IsEmpty())
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{
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SegmentsInitializerList += TEXT(", ");
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}
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FString SectionEvaluationDataStr;
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FBackendHelperUMG::SpecialStructureConstructorUMG(FSectionEvaluationData::StaticStruct()
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, reinterpret_cast<const uint8*>(&SectionEvaluationData)
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, &SectionEvaluationDataStr);
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SegmentsInitializerList += SectionEvaluationDataStr;
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}
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const FString LowerBoundStr = FrameNumberRangeBoundConstructorLambda(MovieSceneSegment->Range.GetLowerBound(),
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MovieSceneSegment->Range.GetLowerBound().IsClosed() ? MovieSceneSegment->Range.GetLowerBoundValue() : FFrameNumber());
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const FString UpperBoundStr = FrameNumberRangeBoundConstructorLambda(MovieSceneSegment->Range.GetUpperBound(),
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MovieSceneSegment->Range.GetUpperBound().IsClosed() ? MovieSceneSegment->Range.GetUpperBoundValue() : FFrameNumber());
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*OutResult = FString::Printf(TEXT("FMovieSceneSegment(TRange<FFrameNumber>(%s, %s), {%s})"), *LowerBoundStr, *UpperBoundStr, *SegmentsInitializerList);
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}
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return true;
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}
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if (FMovieSceneFrameRange::StaticStruct() == Struct)
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{
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if (OutResult)
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{
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const FMovieSceneFrameRange* MovieSceneFrameRange = reinterpret_cast<const FMovieSceneFrameRange*>(ValuePtr);
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const FString LowerBoundStr = FrameNumberRangeBoundConstructorLambda(MovieSceneFrameRange->Value.GetLowerBound(),
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MovieSceneFrameRange->Value.GetLowerBound().IsClosed() ? MovieSceneFrameRange->Value.GetLowerBoundValue() : FFrameNumber());
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const FString UpperBoundStr = FrameNumberRangeBoundConstructorLambda(MovieSceneFrameRange->Value.GetUpperBound(),
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MovieSceneFrameRange->Value.GetUpperBound().IsClosed() ? MovieSceneFrameRange->Value.GetUpperBoundValue() : FFrameNumber());
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*OutResult = FString::Printf(TEXT("FMovieSceneFrameRange(TRange<FFrameNumber>(%s, %s))"), *LowerBoundStr, *UpperBoundStr);
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}
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return true;
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}
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return false;
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}
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bool FBackendHelperUMG::IsTInlineStruct(UScriptStruct* OuterStruct)
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{
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return (OuterStruct == FMovieSceneTrackImplementationPtr::StaticStruct())
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|| (OuterStruct == FMovieSceneEvalTemplatePtr::StaticStruct());
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}
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UScriptStruct* FBackendHelperUMG::InlineValueStruct(UScriptStruct* OuterStruct, const uint8* ValuePtr)
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{
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if (OuterStruct == FMovieSceneTrackImplementationPtr::StaticStruct())
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{
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const FMovieSceneTrackImplementation* MovieSceneTrackImplementation = reinterpret_cast<const FMovieSceneTrackImplementationPtr*>(ValuePtr)->GetPtr();
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if (MovieSceneTrackImplementation)
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{
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return &(MovieSceneTrackImplementation->GetScriptStruct());
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}
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}
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if (OuterStruct == FMovieSceneEvalTemplatePtr::StaticStruct())
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{
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const FMovieSceneEvalTemplate* MovieSceneEvalTemplate = reinterpret_cast<const FMovieSceneEvalTemplatePtr*>(ValuePtr)->GetPtr();
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if (MovieSceneEvalTemplate)
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{
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return &(MovieSceneEvalTemplate->GetScriptStruct());
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}
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}
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return nullptr;
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}
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const uint8* FBackendHelperUMG::InlineValueData(UScriptStruct* OuterStruct, const uint8* ValuePtr)
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{
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if (ValuePtr)
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{
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if (OuterStruct == FMovieSceneTrackImplementationPtr::StaticStruct())
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{
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return reinterpret_cast<const uint8*>(reinterpret_cast<const FMovieSceneTrackImplementationPtr*>(ValuePtr)->GetPtr());
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}
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if (OuterStruct == FMovieSceneEvalTemplatePtr::StaticStruct())
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{
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return reinterpret_cast<const uint8*>(reinterpret_cast<const FMovieSceneEvalTemplatePtr*>(ValuePtr)->GetPtr());
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}
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}
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return nullptr;
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}
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