Custom RichTextBlockDecorator example code #1

RichTextBlockSomeWidgetDecorator.h

// https://baemincheon.github.io/2022/07/28/how-the-rich-text-block-works-in-unrealengine/

#pragma once

#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/Object.h"
#include "Fonts/SlateFontInfo.h"
#include "Styling/SlateTypes.h"
#include "Framework/Text/TextLayout.h"
#include "Framework/Text/ISlateRun.h"
#include "Framework/Text/ITextDecorator.h"
#include "Components/RichTextBlockDecorator.h"
#include "Engine/DataTable.h"
#include "RichTextBlockSomeWidgetDecorator.generated.h"

class ISlateStyle;

USTRUCT(Blueprintable, BlueprintType)
struct FRichSomeWidgetRow : public FTableRowBase
{
	GENERATED_BODY()

public:
	UPROPERTY(EditAnywhere, Category = Appearance)
	FSlateBrush Brush;

	UPROPERTY(EditAnywhere, Category = Appearance)
	FText Text;
};

UCLASS(Abstract, Blueprintable)
class URichTextBlockSomeWidgetDecorator : public URichTextBlockDecorator
{
	GENERATED_BODY()

public:
	URichTextBlockSomeWidgetDecorator(const FObjectInitializer& ObjectInitializer);

	virtual TSharedPtr<ITextDecorator> CreateDecorator(URichTextBlock* InOwner) override;
	virtual const FRichSomeWidgetRow* FindSomeWidgetRow(FName TagOrId, bool bWarnIfMissing);

protected:
	FRichSomeWidgetRow* FindRow(FName TagOrId, bool bWarnIfMissing);

	UPROPERTY(EditAnywhere, Category=Appearance, meta = (RequiredAssetDataTags = "RowStructure=RichSomeWidgetRow"))
	TObjectPtr<class UDataTable> ImageSet;
};