/*
 * Copyright 2013-2014, Stephan Aßmus <superstippi@gmx.de>.
 * Copyright 2021, Andrew Lindesay <apl@lindesay.co.nz>.
 * All rights reserved. Distributed under the terms of the MIT License.
 */
#ifndef PARAGRAPH_H
#define PARAGRAPH_H

#include <vector>

#include "ParagraphStyle.h"
#include "TextSpan.h"


class Paragraph {
public:
                                                                Paragraph();
                                                                Paragraph(const ParagraphStyle& style);
                                                                Paragraph(const Paragraph& other);

                        Paragraph&                      operator=(const Paragraph& other);
                        bool                            operator==(const Paragraph& other) const;
                        bool                            operator!=(const Paragraph& other) const;

                        void                            SetStyle(const ParagraphStyle& style);
        inline  const ParagraphStyle& Style() const
                                                                        { return fStyle; }

                        int32                           CountTextSpans() const;
                        const TextSpan&         TextSpanAtIndex(int32 index) const;

                        bool                            Prepend(const TextSpan& span);
                        bool                            Append(const TextSpan& span);
                        bool                            Insert(int32 offset, const TextSpan& span);
                        bool                            Remove(int32 offset, int32 length);
                        void                            Clear();

                        int32                           Length() const;
                        bool                            IsEmpty() const;
                        bool                            EndsWith(BString string) const;

                        BString                         Text() const;
                        BString                         Text(int32 start, int32 length) const;
                        Paragraph                       SubParagraph(int32 start, int32 length) const;

                        void                            PrintToStream() const;

private:
                        void                            _InvalidateCachedLength();

private:
                        ParagraphStyle          fStyle;
                        std::vector<TextSpan>
                                                                fTextSpans;
        mutable int32                           fCachedLength;
};


#endif // PARAGRAPH_H