progress/progress.cpp

#include <iostream>
#include <ctime>
#include <cstdlib>
#include <libscterm.hpp>
#include <libscscreensaver.hpp>

void show_rows_cols(const sc::term& t) {
    std::cout << t.rows() << " rows, " << t.cols() << " cols\n";
}

void show_progress(const sc::term& t) {
    struct timespec tm;
    tm.tv_nsec = 10000000;
    tm.tv_sec = 0;
    sc::cursor_hider ch {&std::cerr};
    for (int i = 0; i < 1000; ++i) {
        t.progress(12, "progress bar", i, 1000);
        nanosleep(&tm, nullptr);
    }
    std::cerr << sc::io::clear_line(t);
    std::cerr << "progress bar done.";
    std::cerr << std::endl;
}

void show_hue_bar(int top) {
    int r = top;
    int g = 0;
    int b = 0;
    // red -> yellow
    while (g <= top) {
        std::cerr << sc::io::rgbb(r, g++, b) << ' ';
    }
    g = top;
    // yellow -> green
    while (r >= 0) {
        std::cerr << sc::io::rgbb(r--, g, b) << ' ';
    }
    r = 0;
    // green -> cyan
    while (b < top) {
        std::cerr << sc::io::rgbb(r, g, b++) << ' ';
    }
    b = top;
    // cyan -> blue
    while (g >= 0) {
        std::cerr << sc::io::rgbb(r, g--, b) << ' ';
    }
    g = 0;
    // blue -> magenta
    while (r <= top) {
        std::cerr << sc::io::rgbb(r++, g, b) << ' ';
    }
    r = top;
    // magenta -> red
    while (b >= 0) {
        std::cerr << sc::io::rgbb(r, g, b--) << ' ';
    }
    std::cerr << sc::io::reset << std::endl;
}

void show_hue_bars() {
    for (int top = 1; top < 6; ++top) {
        show_hue_bar(top);
    }
}

void show_grayscale_bar() {
    for (int i = 0; i < 23; ++i) {
        std::cerr << sc::io::grayb(i) << ' ';
    }
    std::cerr << sc::io::reset << std::endl;
}

void show_words() {
    std::cout << sc::io::redf << " red ";
    std::cout << sc::io::greenf << " green ";
    std::cout << sc::io::bluef << " blue ";
    std::cout << sc::io::cyanf << " cyan ";
    std::cout << sc::io::magentaf << " magenta ";
    std::cout << sc::io::yellowf << " yellow ";
    std::cout << sc::io::rgbf(5, 2, 0) << " orange ";
    std::cout << sc::io::reset << std::endl;
    std::cout << sc::io::blackf;
    std::cout << sc::io::redb << " red ";
    std::cout << sc::io::greenb << " green ";
    std::cout << sc::io::blueb << " blue ";
    std::cout << sc::io::cyanb << " cyan ";
    std::cout << sc::io::magentab << " magenta ";
    std::cout << sc::io::yellowb << " yellow ";
    std::cout << sc::io::rgbb(5, 2, 0) << " orange ";
    std::cout << sc::io::reset << std::endl;
    std::cout << sc::io::bold;
    std::cout << sc::io::redf << " red ";
    std::cout << sc::io::greenf << " green ";
    std::cout << sc::io::bluef << " blue ";
    std::cout << sc::io::cyanf << " cyan ";
    std::cout << sc::io::magentaf << " magenta ";
    std::cout << sc::io::yellowf << " yellow ";
    std::cout << sc::io::rgbf(5, 2, 0) << " orange ";
    std::cout << sc::io::reset << std::endl;
    std::cout << sc::io::blackf << sc::io::bold;
    std::cout << sc::io::redb << " red ";
    std::cout << sc::io::greenb << " green ";
    std::cout << sc::io::blueb << " blue ";
    std::cout << sc::io::cyanb << " cyan ";
    std::cout << sc::io::magentab << " magenta ";
    std::cout << sc::io::yellowb << " yellow ";
    std::cout << sc::io::rgbb(5, 2, 0) << " orange ";
    std::cout << sc::io::reset << std::endl;
    std::cout << sc::io::bold << "bold " << sc::io::reset;
    std::cout << sc::io::italic << "italic " << sc::io::reset;
    std::cout << sc::io::underline << "underline" << sc::io::reset << ' ';
    std::cout << sc::io::strikethru << "strike thru" << sc::io::reset << ' ';
    std::cout << sc::io::overline << "overline" << sc::io::reset << ' ';
    std::cout << sc::io::reverse << "reverse" << sc::io::reset << ' ';
    std::cout << sc::io::blinkslow << "slow-blink" << sc::io::reset << ' ';
    std::cout << sc::io::blinkfast << "fast-blink" << sc::io::reset;
    std::cout << std::endl;
}

void show_truecolor(const sc::term& t) {
    // check for true color support
    char* support = getenv("COLORTERM");
    if (!support || support[0] == '\0') {
        std::cerr << "no true color support\n";
        return;
    }
    const char* lhb = u8"\u2584"; // lower half block
    const double sat = 1.0;
    for (double bri = 0; bri < 1; bri += 0.2) {
        for (double hue = 0; hue < 360; hue += 360.0 / t.cols()) {
            HSB hsbb = {hue, sat, bri};
            Color bg {hsbb};
            RGB rgbb = RGB(bg);
            HSB hsbf = {hue, sat, bri + 0.1};
            Color fg {hsbf};
            RGB rgbf = RGB(fg);
            std::cerr << sc::io::truecolorb(rgbb.r * 255, rgbb.g * 255, rgbb.b * 255);
            std::cerr << sc::io::truecolorf(rgbf.r * 255, rgbf.g * 255, rgbf.b * 255);
            std::cerr << lhb;
        }
        std::cerr << std::endl;
    }
}

int main() {
    try {
        sc::term term {STDERR_FILENO};
        show_rows_cols(term);
        show_grayscale_bar();
        show_hue_bars();
        show_words();
        show_truecolor(term);
        show_progress(term);
    } catch (const std::exception& ex) {
        std::cerr << sc::io::reset << ex.what() << std::endl;
        return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
}