bwidgets/inc/basic_widgets/w/feat/font_handler.hpp

#ifndef BWIDGETS_FONT_HANDLER_HPP
#define BWIDGETS_FONT_HANDLER_HPP

#include <basic_widgets/core/font.hpp>

namespace bwidgets
{
    class FontHandler
    {
    protected:
        Font*            _font {nullptr};
        Color            _font_color_bg = default_font_color_bg;
        Color            _font_color_fg = default_font_color_fg;
        Font::RenderMode _font_render_mode {Font::RenderMode::SHADED};

        virtual void _handle_font_change(Font*)                            = 0;
        virtual void _handle_font_color_change(const Color&, const Color&) = 0;

    public:
        inline static const Color default_font_color_bg {255, 255, 255,
                                                         SDL_ALPHA_OPAQUE};
        inline static const Color default_font_color_fg {0, 0, 0, SDL_ALPHA_OPAQUE};

        virtual ~FontHandler() = default;

        virtual inline auto font(Font* f) -> FontHandler* final
        {
            if (f != nullptr
                && (f != _font || f->family_name != _font->family_name
                    || f->height != _font->height || f->hinting() != _font->hinting()
                    || f->kerning() != _font->kerning()
                    || f->outline() != _font->outline()
                    || f->style_name != _font->style_name))
            {
                _handle_font_change(f);
                _font = f;
            }
            return this;
        }

        virtual inline auto font_color_bg(const Color& c) -> FontHandler* final
        {
            if (c != _font_color_bg) {
                _handle_font_color_change(_font_color_bg, c);
                _font_color_bg = c;
            }
            return this;
        }

        virtual inline auto font_color_fg(const Color& c) -> FontHandler* final
        {
            if (c != _font_color_fg) {
                _handle_font_color_change(c, _font_color_fg);
                _font_color_fg = c;
            }
            return this;
        }
    };
}

#endif