SyntaxHighlighterTextLayoutMarshaller.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "SlateGlobals.h"
#include "Styling/SlateTypes.h"
#include "Styling/CoreStyle.h"
 
#if WITH_FANCY_TEXT
    #include "Framework/Text/PlainTextLayoutMarshaller.h"
    #include "Framework/Text/SyntaxTokenizer.h"
#endif
 
class FTextLayout;
 
#if WITH_FANCY_TEXT
 
class FSyntaxHighlighterTextLayoutMarshaller : public FPlainTextLayoutMarshaller
{
public:
 
    SLATE_API virtual ~FSyntaxHighlighterTextLayoutMarshaller();
 
    // ITextLayoutMarshaller
    SLATE_API virtual void SetText(const FString& SourceString, FTextLayout& TargetTextLayout) override;
    SLATE_API virtual bool RequiresLiveUpdate() const override;
 
    SLATE_API void EnableSyntaxHighlighting(const bool bEnable);
    SLATE_API bool IsSyntaxHighlightingEnabled() const;
 
protected:
 
    virtual void ParseTokens(const FString& SourceString, FTextLayout& TargetTextLayout, TArray<ISyntaxTokenizer::FTokenizedLine> TokenizedLines) = 0;
 
    SLATE_API FSyntaxHighlighterTextLayoutMarshaller(TSharedPtr< ISyntaxTokenizer > InTokenizer);
 
    TSharedPtr< ISyntaxTokenizer > Tokenizer;
 
    bool bSyntaxHighlightingEnabled;
 
};
 
class FRichTextSyntaxHighlighterTextLayoutMarshaller : public FSyntaxHighlighterTextLayoutMarshaller
{
public:
 
    struct FSyntaxTextStyle
    {
        FSyntaxTextStyle()
            : NormalTextStyle(FCoreStyle::Get().GetWidgetStyle<FTextBlockStyle>("SyntaxHighlight.Normal"))
            , NodeTextStyle(FCoreStyle::Get().GetWidgetStyle<FTextBlockStyle>("SyntaxHighlight.Node"))
            , NodeAttributeKeyTextStyle(FCoreStyle::Get().GetWidgetStyle<FTextBlockStyle>("SyntaxHighlight.NodeAttributeKey"))
            , NodeAttribueAssignmentTextStyle(FCoreStyle::Get().GetWidgetStyle<FTextBlockStyle>("SyntaxHighlight.NodeAttribueAssignment"))
            , NodeAttributeValueTextStyle(FCoreStyle::Get().GetWidgetStyle<FTextBlockStyle>("SyntaxHighlight.NodeAttributeValue"))
        {
        }
 
        FSyntaxTextStyle(const FTextBlockStyle& InNormalTextStyle, const FTextBlockStyle& InNodeTextStyle, const FTextBlockStyle& InNodeAttributeKeyTextStyle, const FTextBlockStyle& InNodeAttribueAssignmentTextStyle, const FTextBlockStyle& InNodeAttributeValueTextStyle)
            : NormalTextStyle(InNormalTextStyle)
            , NodeTextStyle(InNodeTextStyle)
            , NodeAttributeKeyTextStyle(InNodeAttributeKeyTextStyle)
            , NodeAttribueAssignmentTextStyle(InNodeAttribueAssignmentTextStyle)
            , NodeAttributeValueTextStyle(InNodeAttributeValueTextStyle)
        {
        }
 
        FTextBlockStyle NormalTextStyle;
        FTextBlockStyle NodeTextStyle;
        FTextBlockStyle NodeAttributeKeyTextStyle;
        FTextBlockStyle NodeAttribueAssignmentTextStyle;
        FTextBlockStyle NodeAttributeValueTextStyle;
    };
 
    static SLATE_API TSharedRef< FRichTextSyntaxHighlighterTextLayoutMarshaller > Create(const FSyntaxTextStyle& InSyntaxTextStyle);
 
    SLATE_API virtual ~FRichTextSyntaxHighlighterTextLayoutMarshaller();
 
protected:
 
    SLATE_API virtual void ParseTokens(const FString& SourceString, FTextLayout& TargetTextLayout, TArray<ISyntaxTokenizer::FTokenizedLine> TokenizedLines) override;
 
    SLATE_API FRichTextSyntaxHighlighterTextLayoutMarshaller(TSharedPtr< ISyntaxTokenizer > InTokenizer, const FSyntaxTextStyle& InSyntaxTextStyle);
 
    FSyntaxTextStyle SyntaxTextStyle;
 
};
 
#endif //WITH_FANCY_TEXT