SlateInvalidationRootList.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
 
class FSlateInvalidationRoot;
 
class FSlateInvalidationRootList
{
public:
    int32 AddInvalidationRoot(FSlateInvalidationRoot* InvalidationRoot)
    {
        ++GenerationNumber;
        check(GenerationNumber != INDEX_NONE);
        InvalidationRoots.Add(GenerationNumber, InvalidationRoot);
        return GenerationNumber;
    }
 
    void RemoveInvalidationRoot(int32 Id)
    {
        InvalidationRoots.Remove(Id);
    }
 
    const FSlateInvalidationRoot* GetInvalidationRoot(int32 UniqueId) const
    {
        if (UniqueId != INDEX_NONE)
        {
            const FSlateInvalidationRoot* const * FoundElement = InvalidationRoots.Find(UniqueId);
            return FoundElement ? *FoundElement : nullptr;
        }
        return nullptr;
    }
 
    FSlateInvalidationRoot* GetInvalidationRoot(int32 UniqueId)
    {
        return const_cast<FSlateInvalidationRoot*>(const_cast<const FSlateInvalidationRootList*>(this)->GetInvalidationRoot(UniqueId));
    }
    
    const TMap<int32, FSlateInvalidationRoot*>& GetInvalidationRoots() const { return InvalidationRoots; }
 
private:
    TMap<int32, FSlateInvalidationRoot*> InvalidationRoots;
    int32 GenerationNumber = INDEX_NONE;
};
 
extern FSlateInvalidationRootList GSlateInvalidationRootListInstance;