crex
/
src
/
ansi_escape_codes.cc
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161#include "ansi_escape_codes.hh"
#include <string>
#include <vector>
#include <sstream>
#include <regex>
namespace OB
{
namespace ANSI_Escape_Codes
{
// standard escaped characters
std::string const nl {"\n"};
std::string const cr {"\r"};
std::string const tab {"\t"};
std::string const alert {"\a"};
// escape code sequence
std::string const esc {"\033["};
// clears all attributes
std::string const reset {esc + "0m"};
// style
std::string const bold {esc + "1m"};
std::string const dim {esc + "2m"};
std::string const italic {esc + "3m"};
std::string const underline {esc + "4m"};
std::string const blink {esc + "5m"};
std::string const rblink {esc + "6m"};
std::string const reverse {esc + "7m"};
std::string const conceal {esc + "8m"};
std::string const cross {esc + "9m"};
// erasing
std::string const erase_end {esc + "K"};
std::string const erase_start {esc + "1K"};
std::string const erase_line {esc + "2K"};
std::string const erase_down {esc + "J"};
std::string const erase_up {esc + "1J"};
std::string const erase_screen {esc + "2J"};
// cursor visibility
std::string const cursor_hide {esc + "?25l"};
std::string const cursor_show {esc + "?25h"};
// cursor movement
std::string const cursor_home {esc + "0;0H"};
std::string const cursor_up {esc + "1A"};
std::string const cursor_down {esc + "1B"};
std::string const cursor_right {esc + "1C"};
std::string const cursor_left {esc + "1D"};
std::string const cursor_save {"\0337"};
std::string const cursor_load {"\0338"};
// foreground color
std::string const fg_black {esc + "30m"};
std::string const fg_red {esc + "31m"};
std::string const fg_green {esc + "32m"};
std::string const fg_yellow {esc + "33m"};
std::string const fg_blue {esc + "34m"};
std::string const fg_magenta {esc + "35m"};
std::string const fg_cyan {esc + "36m"};
std::string const fg_white {esc + "37m"};
// background color
std::string const bg_black {esc + "40m"};
std::string const bg_red {esc + "41m"};
std::string const bg_green {esc + "42m"};
std::string const bg_yellow {esc + "43m"};
std::string const bg_blue {esc + "44m"};
std::string const bg_magenta {esc + "45m"};
std::string const bg_cyan {esc + "46m"};
std::string const bg_white {esc + "47m"};
std::string fg_256(std::string x)
{
auto n = std::stoi(x);
if (n < 0 || n > 256) return {};
std::stringstream ss;
ss << esc << "38;5;" << x << "m";
return ss.str();
}
std::string bg_256(std::string x)
{
auto n = std::stoi(x);
if (n < 0 || n > 256) return {};
std::stringstream ss;
ss << esc << "48;5;" << x << "m";
return ss.str();
}
std::string htoi(std::string x)
{
std::stringstream ss;
ss << x;
unsigned int n;
ss >> std::hex >> n;
return std::to_string(n);
}
bool valid_hstr(std::string& str)
{
std::smatch m;
std::regex rx {"^#?((?:[0-9a-fA-F]{3}){1,2})$"};
if (std::regex_match(str, m, rx))
{
std::string hstr {m[1]};
if (hstr.size() == 3)
{
std::stringstream ss;
ss << hstr[0] << hstr[0] << hstr[1] << hstr[1] << hstr[2] << hstr[2];
hstr = ss.str();
}
str = hstr;
return true;
}
return false;
}
std::string fg_true(std::string x)
{
if (! valid_hstr(x)) return {};
std::string h1 {x.substr(0, 2)};
std::string h2 {x.substr(2, 2)};
std::string h3 {x.substr(4, 2)};
std::stringstream ss; ss
<< esc << "38;2;"
<< htoi(h1) << ";"
<< htoi(h2) << ";"
<< htoi(h3) << "m";
return ss.str();
}
std::string bg_true(std::string x)
{
if (! valid_hstr(x)) return {};
std::string h1 {x.substr(0, 2)};
std::string h2 {x.substr(2, 2)};
std::string h3 {x.substr(4, 2)};
std::stringstream ss; ss
<< esc << "48;2;"
<< htoi(h1) << ";"
<< htoi(h2) << ";"
<< htoi(h3) << "m";
return ss.str();
}
std::string cursor_set(size_t x, size_t y)
{
std::stringstream ss;
ss << esc << y << ";" << x << "H";
return ss.str();
}
} // namespace ANSI_Escape_Codes
} // namespace OB