// Copyright 2019 Google LLC.

#ifndef ParagraphPainter_DEFINED

#define ParagraphPainter_DEFINED

#include "include/core/SkPaint.h"

#include "include/core/SkTextBlob.h"

#include <optional>

#include <variant>

namespace skia {

namespace textlayout {

class ParagraphPainter {

public:

    typedef int PaintID;

    typedef std::variant<SkPaint, PaintID> SkPaintOrID;

    struct DashPathEffect {

        DashPathEffect(SkScalar onLength, SkScalar offLength);

        SkScalar fOnLength;

        SkScalar fOffLength;

    };

    class DecorationStyle {

    public:

        DecorationStyle();

        DecorationStyle(SkColor color, SkScalar strokeWidth,

                        std::optional<DashPathEffect> dashPathEffect);

        SkColor getColor() const { return fColor; }

        SkScalar getStrokeWidth() const { return fStrokeWidth; }

        std::optional<DashPathEffect> getDashPathEffect() const { return fDashPathEffect; }

        const SkPaint& skPaint() const { return fPaint; }

    private:

        SkColor fColor;

        SkScalar fStrokeWidth;

        std::optional<DashPathEffect> fDashPathEffect;

        SkPaint fPaint;

    };

    virtual ~ParagraphPainter() = default;

    virtual void drawTextBlob(const sk_sp<SkTextBlob>& blob, SkScalar x, SkScalar y, const SkPaintOrID& paint) = 0;

    virtual void drawTextShadow(const sk_sp<SkTextBlob>& blob, SkScalar x, SkScalar y, SkColor color, SkScalar blurSigma) = 0;

    virtual void drawRect(const SkRect& rect, const SkPaintOrID& paint) = 0;

    virtual void drawFilledRect(const SkRect& rect, const DecorationStyle& decorStyle) = 0;

    virtual void drawPath(const SkPath& path, const DecorationStyle& decorStyle) = 0;

    virtual void drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, const DecorationStyle& decorStyle) = 0;

    virtual void clipRect(const SkRect& rect) = 0;

    virtual void translate(SkScalar dx, SkScalar dy) = 0;

    virtual void save() = 0;

    virtual void restore() = 0;

};

}  // namespace textlayout

}  // namespace skia

#endif  // ParagraphPainter_DEFINED