添加ReactUMG插件
搭建TS环境
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// Fill out your copyright notice in the Description page of Project Settings.
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#include "ReactDeclarationGenerator.h"
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#include "TypeScriptDeclarationGenerator.h"
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#include "Misc/Paths.h"
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#include "CoreUObject.h"
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#include "TypeScriptDeclarationGenerator.h"
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#include "Components/PanelSlot.h"
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#include "Components/Widget.h"
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#include "Interfaces/IPluginManager.h"
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static FString SafeName(const FString& Name)
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{
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auto Ret = Name.Replace(TEXT(" "), TEXT(""))
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.Replace(TEXT("-"), TEXT("_"))
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.Replace(TEXT("/"), TEXT("_"))
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.Replace(TEXT("("), TEXT("_"))
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.Replace(TEXT(")"), TEXT("_"))
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.Replace(TEXT("?"), TEXT("$"))
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.Replace(TEXT(","), TEXT("_"));
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if (Ret.Len() > 0)
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{
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auto FirstChar = Ret[0];
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if ((TCHAR) '0' <= FirstChar && FirstChar <= (TCHAR) '9')
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{
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return TEXT("_") + Ret;
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}
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}
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return Ret;
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}
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static bool IsDelegate(PropertyMacro* InProperty)
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{
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return InProperty->IsA<DelegatePropertyMacro>() || InProperty->IsA<MulticastDelegatePropertyMacro>()
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#if ENGINE_MINOR_VERSION >= 23
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|| InProperty->IsA<MulticastInlineDelegatePropertyMacro>() || InProperty->IsA<MulticastSparseDelegatePropertyMacro>()
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#endif
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;
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}
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static bool HasObjectParam(UFunction* InFunction)
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{
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for (TFieldIterator<PropertyMacro> ParamIt(InFunction); ParamIt; ++ParamIt)
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{
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auto Property = *ParamIt;
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if (Property->IsA<ObjectPropertyBaseMacro>())
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{
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return true;
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}
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}
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return false;
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}
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struct FReactDeclarationGenerator : public FTypeScriptDeclarationGenerator
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{
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void Begin(FString Namespace) override;
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void GenReactDeclaration();
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void GenClass(UClass* Class) override;
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void GenStruct(UStruct* Struct) override;
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void GenEnum(UEnum* Enum) override;
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void End() override;
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virtual ~FReactDeclarationGenerator()
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{
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}
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};
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//--- FSlotDeclarationGenerator begin ---
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void FReactDeclarationGenerator::Begin(FString Namespace)
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{
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} // do nothing
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void FReactDeclarationGenerator::End()
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{
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} // do nothing
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void FReactDeclarationGenerator::GenReactDeclaration()
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{
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FString Components = TEXT("exports.lazyloadComponents = {};\n");
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Output << "declare module \"react-umg\" {\n";
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Output << " "
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<< "import * as React from 'react';\n import * as UE from 'ue';\n import * as cpp from 'cpp';\n type TArray<T> "
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"= UE.TArray<T>;\n type "
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"TSet<T> = UE.TSet<T>;\n type TMap<TKey, TValue> = UE.TMap<TKey, TValue>;\n\n";
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Output << " type RecursivePartial<T> = {\n"
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<< " [P in keyof T]?:\n"
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<< " T[P] extends (infer U)[] ? RecursivePartial<U>[] :\n"
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<< " T[P] extends object ? RecursivePartial<T[P]> :\n"
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<< " T[P];\n"
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<< " };\n\n";
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for (TObjectIterator<UClass> It; It; ++It)
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{
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UClass* Class = *It;
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checkfSlow(Class != nullptr, TEXT("Class name corruption!"));
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if (Class->GetName().StartsWith("SKEL_") || Class->GetName().StartsWith("REINST_") ||
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Class->GetName().StartsWith("TRASHCLASS_") || Class->GetName().StartsWith("PLACEHOLDER_"))
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{
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continue;
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}
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if (Class->IsChildOf<UPanelSlot>())
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Gen(Class);
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}
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Output << " "
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<< "export interface Props {\n";
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Output << " "
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<< " Slot ? : PanelSlot;\n";
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Output << " "
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<< "}\n\n";
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for (TObjectIterator<UClass> It; It; ++It)
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{
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UClass* Class = *It;
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checkfSlow(Class != nullptr, TEXT("Class name corruption!"));
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if (Class->GetName().StartsWith("SKEL_") || Class->GetName().StartsWith("REINST_") ||
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Class->GetName().StartsWith("TRASHCLASS_") || Class->GetName().StartsWith("PLACEHOLDER_"))
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{
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continue;
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}
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if (Class->IsChildOf<UWidget>())
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{
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Gen(Class);
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Components += "exports." + SafeName(Class->GetName()) + " = '" + SafeName(Class->GetName()) + "';\n";
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if (!(Class->ClassFlags & CLASS_Native))
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{
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Components += "exports.lazyloadComponents." + SafeName(Class->GetName()) + " = '" + Class->GetPathName() + "';\n";
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}
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}
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}
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Output << R"(
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interface Root {
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removeFromViewport() : void;
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getWidget(): any;
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}
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interface TReactUMG {
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render(element: React.ReactElement) : Root;
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init(world: any) : void;
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}
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var ReactUMG : TReactUMG;
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}
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)";
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FFileHelper::SaveStringToFile(ToString(), *(FPaths::ProjectDir() / TEXT("Typing/react-umg/index.d.ts")),
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FFileHelper::EEncodingOptions::ForceUTF8WithoutBOM);
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FFileHelper::SaveStringToFile(Components, *(FPaths::ProjectContentDir() / TEXT("JavaScript/react-umg/components.js")),
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FFileHelper::EEncodingOptions::ForceUTF8WithoutBOM);
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}
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static bool IsReactSupportProperty(PropertyMacro* Property)
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{
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if (CastFieldMacro<ObjectPropertyMacro>(Property) || CastFieldMacro<ClassPropertyMacro>(Property) ||
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CastFieldMacro<WeakObjectPropertyMacro>(Property) || CastFieldMacro<SoftObjectPropertyMacro>(Property) ||
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CastFieldMacro<LazyObjectPropertyMacro>(Property))
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return false;
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if (auto ArrayProperty = CastFieldMacro<ArrayPropertyMacro>(Property))
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{
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return IsReactSupportProperty(ArrayProperty->Inner);
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}
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else if (auto DelegateProperty = CastFieldMacro<DelegatePropertyMacro>(Property))
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{
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return !HasObjectParam(DelegateProperty->SignatureFunction);
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}
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else if (auto MulticastDelegateProperty = CastFieldMacro<MulticastDelegatePropertyMacro>(Property))
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{
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return !HasObjectParam(MulticastDelegateProperty->SignatureFunction);
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}
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return true;
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}
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void FReactDeclarationGenerator::GenClass(UClass* Class)
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{
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if (!Class->IsChildOf<UPanelSlot>() && !Class->IsChildOf<UWidget>())
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return;
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bool IsWidget = Class->IsChildOf<UWidget>();
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FStringBuffer StringBuffer{"", ""};
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StringBuffer << " "
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<< "interface " << SafeName(Class->GetName());
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if (IsWidget)
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StringBuffer << "Props";
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auto Super = Class->GetSuperStruct();
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if (Super && (Super->IsChildOf<UPanelSlot>() || Super->IsChildOf<UWidget>()))
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{
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Gen(Super);
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StringBuffer << " extends " << SafeName(Super->GetName());
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if (Super->IsChildOf<UWidget>())
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StringBuffer << "Props";
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}
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else if (IsWidget)
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{
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StringBuffer << " extends Props";
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}
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StringBuffer << " {\n";
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for (TFieldIterator<PropertyMacro> PropertyIt(Class, EFieldIteratorFlags::ExcludeSuper); PropertyIt; ++PropertyIt)
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{
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auto Property = *PropertyIt;
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if (!IsReactSupportProperty(Property))
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continue;
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//UE.27上遇到一个问题,
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//引擎内置蓝图DefaultBurnIn有个FLinearColor类型的变量Foreground Color,
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//并且父类UUserWidget有个FSlateColor类型的变量ForegroundColor
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//此处SafeName去掉空格导致interface写入了父类变量名字,类型对不上,有报错,仅此一例
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//PuerTS插件DeclarationGenerator.cpp中的SafeName存在同样隐患
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FString PropertyNameSafe = SafeName(Property->GetName());
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UClass* SuperClass = Class->GetSuperClass();
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if (PropertyNameSafe != Property->GetName() &&
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SuperClass != nullptr && SuperClass->FindPropertyByName(*PropertyNameSafe) != nullptr)
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{
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UE_LOG(LogTemp, Warning, TEXT("ReactUMG, invalid property name, origin name: %s, safe name %s in super class!"), *Property->GetName(), *PropertyNameSafe);
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continue;
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}
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FStringBuffer TmpBuff;
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TmpBuff << " " << SafeName(Property->GetName()) << "?: ";
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TArray<UObject*> RefTypesTmp;
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if (!IsWidget && IsDelegate(Property)) // UPanelSlot skip delegate
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{
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continue;
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}
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if (CastFieldMacro<StructPropertyMacro>(Property))
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{
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TmpBuff << "RecursivePartial<";
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}
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if (!GenTypeDecl(TmpBuff, Property, RefTypesTmp, false, true))
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{
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continue;
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}
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if (CastFieldMacro<StructPropertyMacro>(Property))
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{
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TmpBuff << ">";
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}
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for (auto Type : RefTypesTmp)
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{
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Gen(Type);
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}
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StringBuffer << " " << TmpBuff.Buffer << ";\n";
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}
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StringBuffer << " "
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<< "}\n\n";
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if (IsWidget)
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{
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StringBuffer << " "
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<< "class " << SafeName(Class->GetName()) << " extends React.Component<" << SafeName(Class->GetName())
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<< "Props> {\n"
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<< " nativePtr: " << GetNameWithNamespace(Class) << ";\n }\n\n";
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}
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Output << StringBuffer;
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}
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void FReactDeclarationGenerator::GenStruct(UStruct* Struct)
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{
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}
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void FReactDeclarationGenerator::GenEnum(UEnum* Enum)
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{
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}
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//--- FSlotDeclarationGenerator end ---
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void UReactDeclarationGenerator::Gen_Implementation() const
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{
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FReactDeclarationGenerator ReactDeclarationGenerator;
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ReactDeclarationGenerator.GenReactDeclaration();
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}
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