cli-color
Version:
Colors, formatting and other tools for the console
103 lines (76 loc) • 2.55 kB
JavaScript
/* CSI - control sequence introducer */
/* SGR - set graphic rendition */
var assign = require("es5-ext/object/assign")
, includes = require("es5-ext/string/#/contains")
, forOwn = require("es5-ext/object/for-each")
, onlyKey = require("es5-ext/object/first-key")
, forEachRight = require("es5-ext/array/#/for-each-right")
, uniq = require("es5-ext/array/#/uniq.js");
var CSI = "\x1b[";
var sgr = function (code) { return CSI + code + "m"; };
sgr.CSI = CSI;
var mods = assign(
{
// Style
bold: { _bold: [1, 22] },
italic: { _italic: [3, 23] },
underline: { _underline: [4, 24] },
blink: { _blink: [5, 25] },
inverse: { _inverse: [7, 27] },
strike: { _strike: [9, 29] }
// Color
},
["black", "red", "green", "yellow", "blue", "magenta", "cyan", "white"].reduce(function (
obj,
color,
index
) {
// foreground
obj[color] = { _fg: [30 + index, 39] };
obj[color + "Bright"] = { _fg: [90 + index, 39] };
// background
obj["bg" + color[0].toUpperCase() + color.slice(1)] = { _bg: [40 + index, 49] };
obj["bg" + color[0].toUpperCase() + color.slice(1) + "Bright"] = { _bg: [100 + index, 49] };
return obj;
}, {})
);
sgr.mods = mods;
sgr.openers = {};
sgr.closers = {};
forOwn(mods, function (mod) {
var modPair = mod[onlyKey(mod)];
sgr.openers[modPair[0]] = modPair;
sgr.closers[modPair[1]] = modPair;
});
sgr.openStyle = function (openedMods, code) { openedMods.push(sgr.openers[code]); };
sgr.closeStyle = function (openedMods, code) {
forEachRight.call(openedMods, function (modPair, index) {
if (modPair[1] === code) {
openedMods.splice(index, 1);
}
});
};
/* prepend openers */
sgr.prepend = function (currentMods) {
return currentMods.map(function (modPair) { return sgr(modPair[0]); });
};
/* complete non-closed openers with corresponding closers */
sgr.complete = function (openedMods, closerCodes) {
closerCodes.forEach(function (code) { sgr.closeStyle(openedMods, code); });
// mods must be closed from the last opened to first opened
openedMods = openedMods.reverse();
openedMods = openedMods.map(function (modPair) { return modPair[1]; });
// one closer can close many openers (31, 32 -> 39)
openedMods = uniq.call(openedMods);
return openedMods.map(sgr);
};
var hasCSI = function (str) { return includes.call(str, CSI); };
sgr.hasCSI = hasCSI;
var extractCode = function (csi) {
var code = csi.slice(2, -1);
code = Number(code);
return code;
};
sgr.extractCode = extractCode;
module.exports = sgr;
;