Xenith/xenith/ui/tui.hpp

#pragma once

#include <sys/ioctl.h>
#include <cstdint>
#include <memory>
#include <optional>
#include <termios.h>
#include <utility>
#include <vector>
#include <string>

namespace ui
{
    class Mouse
    {
    private:
        struct pos_t { int x; int y; };
        inline static bool btn0 = false;
        inline static bool btn1 = false;
        inline static bool btn2 = false;
        inline static int scroll = 0;
        inline static pos_t pos = {};
    public:
        static bool is_pressed(int index_btn = 0);
        static int get_scroll();
        static void reset_scroll();
        static void parse_ansi(char buf[]);
        static pos_t get_pos();
    };

    class Tui
    {
    public:
        enum class Color : int {
            DefaultText = 39, DefaultBg = 49, Black = 30, Red = 31,
            Green = 32, Yellow = 33, Blue = 34, Magenta = 35,
            Cyan = 36, White = 37
        };
        Tui();
        ~Tui();
        static void update();
        [[nodiscard]] bool is_running() const;
    private:
        inline static auto need_update_chat = false;
        inline static auto mouse = Mouse();
        inline static std::string chat_input;
        inline static bool cursor = false;
        inline static uint32_t frame_count = 0;
        inline static int background = 49;
        inline static int foreground = 39;
        inline static bool running = true;
        inline static int width = 80;
        inline static int height = 24;
        struct msg_block
        {
            std::optional<std::string> left = std::nullopt;
            std::optional<std::string> right = std::nullopt;
        };
        inline static std::vector<msg_block> chat_history;
        struct SplitDesc {
            enum Type { VERTICAL, HORIZONTAL };
            Type type;
            int position;
            std::vector<std::unique_ptr<SplitDesc>> children;
            SplitDesc(const Type t, const int pos) : type(t), position(pos) {}
        };
        struct border_charset {
            std::string_view top_left, top_right, bottom_left, bottom_right;
            std::string_view bottom, top, horizontal, vertical, bg;
            std::string_view cross, tee_up, tee_down, tee_left, tee_right;
        };
        struct scroll_chars
        {
            std::string_view top;
            std::string_view full;
            std::string_view bottom;
        };
        struct TuiCell {
            std::string ch;
            int width;
            TuiCell() : ch(" "), width(1) {}
            TuiCell(std::string  c, const int w) : ch(std::move(c)), width(w) {}
        };
        std::string proces_chars = "⠙⠸⠴⠦⠇⠋";
        inline static struct termios orig_termios;
        inline static constexpr scroll_chars main_scroll_charset {
            .top =      "▗",
            .full =     "▐",
            .bottom =   "▝",
        };
        inline static constexpr border_charset border_clip {
            .top_left="╭", .top_right="╮", .bottom_left="╰", .bottom_right="╯",
            .bottom="─", .top="─", .horizontal="─", .vertical="│", .bg=" ",
            .cross="┼", .tee_up="┴", .tee_down="┬", .tee_left="┤", .tee_right="├"
        };
        inline static constexpr border_charset border_ascii {
            .top_left="+", .top_right="+", .bottom_left="+", .bottom_right="+",
            .bottom="-", .top="-", .horizontal="-", .vertical="|", .bg=" ",
            .cross="+", .tee_up="+", .tee_down="+", .tee_left="+",
            .tee_right="+"
        };
        inline static constexpr border_charset border_bold {
            .top_left="┏", .top_right="┓", .bottom_left="┗", .bottom_right="┛",
            .bottom="━", .top="━", .horizontal="━", .vertical="┃",
            .bg=" ", .cross = "╋", .tee_up = "┻", .tee_down = "┳", .tee_left = "┨",
            .tee_right = "┣"
        };
        inline static constexpr border_charset border_solid {
            .top_left="▟", .top_right="▙", .bottom_left="▜", .bottom_right="▛",
            .bottom="█", .top="█", .horizontal = "█", .vertical="█",
            .bg=" ", .cross = "█", .tee_up = "█", .tee_down = "█", .tee_left = "█",
            .tee_right = "█",
        };
        inline static constexpr border_charset border_btn {
            .top_left="▟", .top_right="▙", .bottom_left="▜", .bottom_right="▛",
            .bottom="█", .top="█", .horizontal = "█", .vertical="█",
            .bg="█", .cross = "█", .tee_up = "█", .tee_down = "█", .tee_left = "█",
            .tee_right = "█"
        };
        static void init_draw();
        static winsize get_console_size();
        static bool wait_for_input_or_timeout(int timeout_ms);
        static void apply_color();
        static void disable_raw_mode();
        static void enable_raw_mode();
        static void move_cursor(int x, int y);
        static void clear();
        static void draw_border(int w, int h, border_charset charset = border_clip, int x = 1, int y = 1);
        static void hide_cursor();
        static void show_cursor();
        static void set_background(Color clr);
        static void set_foreground(Color clr);
        static void move_cursor_right(int n);
        static void move_cursor_x(int col);
        static void move_cursor_y(int row);
        static void invert_color();
        static void draw_button(int x, int y, int w, int h, std::string_view label, border_charset charset = border_solid);
        static void invert_color_off();
        static void draw_split_border(int w, int h, border_charset charset, int x, int y, const SplitDesc* root);
        static void apply_splits_recursive(std::vector<std::vector<TuiCell>>& grid, int offset_x, int offset_y, int w, int h, border_charset charset, const SplitDesc* split);
        static void apply_single_split(std::vector<std::vector<TuiCell>>& grid, int offset_x, int offset_y, int w, int h, border_charset charset, const SplitDesc* split);
        static void draw_border_to_buffer(std::vector<std::vector<TuiCell>>& grid, int w, int h, border_charset charset);
        static void push_msg_left(const std::string& msg);
        static void push_msg_right(const std::string& msg);
        static void draw_msg();
    };
}