index.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

/**
 * This will take a HEX or RGB web color. pSBC can shade it darker or lighter,
 * or blend it with a second color, and can also pass it right thru but convert
 * from Hex to RGB (Hex2RGB) or RGB to Hex (RGB2Hex).
 * All without you even knowing what color format you are using.
 *
 * @param {number} p - From 0 to 1 Percentage float (Required).
 * @param {string} from - From 0 to 1 Percentage float (Required).
 * @param {string} to - From 0 to 1 Percentage float (Required).
 * @returns {string|null} Either Hex or RGB color. Null if invalid color or percentage number.
 */

exports.default = function(p, from, to) {
  if (
    typeof p !== "number" ||
    p < -1 ||
    p > 1 ||
    typeof from !== "string" ||
    (from[0] != "r" && from[0] != "#") ||
    (to && typeof to !== "string")
  )
    return null; // ErrorCheck
  var sbcRip = function sbcRip(d) {
    var l = d.length;
    var RGB = {};
    if (l > 9) {
      d = d.split(",");
      if (d.length < 3 || d.length > 4) return null; // ErrorCheck
      (RGB[0] = i(d[0].split("(")[1])),
        (RGB[1] = i(d[1])),
        (RGB[2] = i(d[2])),
        (RGB[3] = d[3] ? parseFloat(d[3]) : -1);
    } else {
      if (l == 8 || l == 6 || l < 4) return null; // ErrorCheck
      if (l < 6)
        d =
          "#" +
          d[1] +
          d[1] +
          d[2] +
          d[2] +
          d[3] +
          d[3] +
          (l > 4 ? "" + d[4] + d[4] : ""); // 3 or 4 digit
      (d = i(d.slice(1), 16)),
        (RGB[0] = (d >> 16) & 255),
        (RGB[1] = (d >> 8) & 255),
        (RGB[2] = d & 255),
        (RGB[3] = -1);
      if (l == 9 || l == 5)
        (RGB[3] = r((RGB[2] / 255) * 10000) / 10000),
          (RGB[2] = RGB[1]),
          (RGB[1] = RGB[0]),
          (RGB[0] = (d >> 24) & 255);
    }
    return RGB;
  };
  var i = parseInt;
  var r = Math.round;
  var h = from.length > 9;
  var h =
    typeof to === "string"
      ? to.length > 9
      ? true
      : to == "c"
        ? !h
        : false
      : h;
  var b = p < 0;
  var p = b ? p * -1 : p;
  var to = to && to != "c" ? to : b ? "#000000" : "#FFFFFF";
  var f = sbcRip(from);
  var t = sbcRip(to);
  if (!f || !t) return null; // ErrorCheck
  if (h)
    return (
      "rgb" +
      (f[3] > -1 || t[3] > -1 ? "a(" : "(") +
      r((t[0] - f[0]) * p + f[0]) +
      "," +
      r((t[1] - f[1]) * p + f[1]) +
      "," +
      r((t[2] - f[2]) * p + f[2]) +
      (f[3] < 0 && t[3] < 0
        ? ")"
        : "," +
        (f[3] > -1 && t[3] > -1
          ? r(((t[3] - f[3]) * p + f[3]) * 10000) / 10000
          : t[3] < 0
            ? f[3]
            : t[3]) +
        ")")
    );
  return (
    "#" +
    (
      0x100000000 +
      r((t[0] - f[0]) * p + f[0]) * 0x1000000 +
      r((t[1] - f[1]) * p + f[1]) * 0x10000 +
      r((t[2] - f[2]) * p + f[2]) * 0x100 +
      (f[3] > -1 && t[3] > -1
        ? r(((t[3] - f[3]) * p + f[3]) * 255)
        : t[3] > -1
          ? r(t[3] * 255)
          : f[3] > -1
            ? r(f[3] * 255)
            : 255)
    )
      .toString(16)
      .slice(1, f[3] > -1 || t[3] > -1 ? undefined : -2)
  );
};