ISlateRun.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "Widgets/SWidget.h"
#include "Framework/Text/IRun.h"
#include "Framework/Text/TextLayout.h"
#include "Framework/Text/ILayoutBlock.h"
 
class FArrangedChildren;
class FPaintArgs;
class FSlateWindowElementList;
struct FTextBlockStyle;
 
struct FTextArgs
{
    FTextArgs(const FTextLayout::FLineView& InLine, const TSharedRef<ILayoutBlock>& InBlock, const FTextBlockStyle& InDefaultStyle, ETextOverflowPolicy InOverflowPolicy, ETextOverflowDirection InOverflowDirection)
        : Line(InLine)
        , Block(InBlock)
        , DefaultStyle(InDefaultStyle)
        , OverflowPolicy(InOverflowPolicy)
        , OverflowDirection(InOverflowDirection)
        , bIsLastVisibleBlock(false)
        , bIsNextBlockClipped(false)
    {}
 
    const FTextLayout::FLineView& Line;
    const TSharedRef< ILayoutBlock >& Block;
    const FTextBlockStyle& DefaultStyle;
    ETextOverflowPolicy OverflowPolicy;
    ETextOverflowDirection OverflowDirection;
    bool bIsLastVisibleBlock;
    bool bIsNextBlockClipped;
 
};
 
class ISlateRun : public IRun
{
public:
    virtual int32 OnPaint(const FPaintArgs& PaintArgs, const FTextArgs& TextArgs, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const = 0;
 
    virtual const TArray< TSharedRef<SWidget> >& GetChildren() = 0;
 
    virtual void ArrangeChildren(const TSharedRef< ILayoutBlock >& Block, const FGeometry& AllottedGeometry, FArrangedChildren& ArrangedChildren) const = 0;
};