Find background color

[wolfv]

I am trying to write a small helper to find the background / foreground colors of a terminal. I can get hexadecimal values by asking echo "\e]11;?\a"

I tried to implement this:

void Term::get_background_color() {
    char buf[32];
    write("\e]11;?\a");
    for (unsigned int i = 0; i < sizeof(buf) - 1; i++) {
        while (!Private::read_raw(&buf[i]))
            ;
        std::cout << "read [" << i << "] " << buf[i] << std::endl;
    }
}

But it seems to block. Any ideas? @certik this is for mamba/micromamba progress bars :)

[certik]

There is a way to do it, let me investigate.

[wolfv]

Actually, if I use a Terminal with enable_keyboard = true this code seems to work decently well!

void Term::get_background_color() {
    char buf[24];
    write("\e]11;?\a");
    for (unsigned int i = 0; i < sizeof(buf) - 1; i++) {
        while (!Private::read_raw(&buf[i]))
            ;
    }
    std::string color(buf, 23);
    std::cout << "Received background color of : " << color.substr(1, color.size()) << std::endl;
    if (color.substr(0, 9) != "\x1B]11;rgb:") {
        throw std::runtime_error("Did not receive a color");
    }

    color = color.substr(9, color.size());
    std::string r, g, b;
    std::size_t split1, split2;
    
    split1 = color.find_first_of("/");
    r = color.substr(0, split1);
    split1++;
    split2 = color.find_first_of("/", split1);
    g = color.substr(split1, split2 - split1);
    b = color.substr(split2 + 1, color.size() - split2 + 1);

    std::cout << "R: " << r << std::endl;
    std::cout << "G: " << g << std::endl;
    std::cout << "B: " << b << std::endl;
}

[certik]

Yes, I think that was it. Sorry I didn't have time yesterday to look deeper.

[MCWertGaming]

I think we should add this to the library as extra feature. I'm adding it to the roadmap. Would be nice if we merge the open PR first.