@youtwitface/ntcjs/lib/ntc.js

A Node CommonJS compatible wrapper for the Name That Color library (ntc js) - http://chir.ag/projects/ntc/

"use strict";
/*
+-----------------------------------------------------------------+
|     Created by Chirag Mehta - http://chir.ag/projects/ntc       |
|-----------------------------------------------------------------|
|               ntc js (Name that Color JavaScript)               |
+-----------------------------------------------------------------+

All the functions, code, lists etc. have been written specifically
for the Name that Color JavaScript by Chirag Mehta unless otherwise
specified.

This script is released under the: Creative Commons License:
Attribution 2.5 http://creativecommons.org/licenses/by/2.5/
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const utils = __importStar(require("./utils"));
const names_1 = __importDefault(require("./names"));
const getColorName = (color) => {
    color = color.toUpperCase();
    if (color.length < 3 || color.length > 7) {
        return ['#000000', `Invalid Color: ${color}`, false];
    }
    if (color.length % 3 == 0) {
        color = `#${color}`;
    }
    if (color.length == 4) {
        color = `#${color[1].repeat(2)}${color[2].repeat(2)}${color[3].repeat(2)}`;
    }
    const [r, g, b] = utils.rgb(color);
    const [h, s, l] = utils.hsl(color);
    let cl = -1;
    let df = -1;
    for (let i = 0; i < names_1.default.length; i++) {
        if (color === names_1.default[i][0]) {
            return [names_1.default[i][0], names_1.default[i][1], true];
        }
        const ndf1 = Math.pow(r - names_1.default[i][2], 2) +
            Math.pow(g - names_1.default[i][3], 2) +
            Math.pow(b - names_1.default[i][4], 2);
        const ndf2 = Math.pow(h - names_1.default[i][5], 2) +
            Math.pow(s - names_1.default[i][6], 2) +
            Math.pow(l - names_1.default[i][7], 2);
        const ndf = ndf1 + ndf2 * 2;
        if (df < 0 || df > ndf) {
            df = ndf;
            cl = i;
        }
    }
    return cl < 0
        ? ['#000000', `Invalid Color: ${color}`, false]
        : [names_1.default[cl][0], names_1.default[cl][1], false];
};
exports.default = getColorName;