text_style.hpp

// Copyright Take Vos 2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "font_variant.hpp"
#include "text_decoration.hpp"
#include "font_family_id.hpp"
#include "../color/color.hpp"
#include <format>
#include <ostream>
 
namespace tt {
class font_book;
 
struct text_style {
    static constexpr float default_dpi = 84.0f;
    static constexpr float dpi_scale = default_dpi / 72.0f;
 
    font_family_id family_id;
    font_variant variant;
    float size;
    color color;
    text_decoration decoration;
 
    text_style() noexcept :
        family_id(), variant(), size(0.0), color(), decoration(text_decoration::None) {}
 
    text_style(tt::font_family_id family_id, tt::font_variant variant, float size, tt::color color, text_decoration decoration) noexcept :
        family_id(family_id), variant(variant), size(size), color(color), decoration(decoration) {}
 
    text_style(text_style const &) noexcept = default;
    text_style(text_style &&) noexcept = default;
    text_style &operator=(text_style const &) noexcept = default;
    text_style &operator=(text_style &&) noexcept = default;
 
    float scaled_size() const noexcept {
        return size * dpi_scale;
    }
 
    [[nodiscard]] friend std::string to_string(text_style const &rhs) noexcept {
        // XXX - fmt:: no longer can format tagged_ids??????
 
        //return std::format("<text_style id={},v={},s={},c={},d={}>",
        //    rhs.family_id, rhs.variant, rhs.size, rhs.color, rhs.decoration
        //);
        tt_not_implemented();
    }
 
    friend std::ostream &operator<<(std::ostream &lhs, text_style const &rhs) {
        return lhs << to_string(rhs);
    }
};
 
}