@thi.ng/color/convert.js

Array-based color types, CSS parsing, conversions, transformations, declarative theme generation, gradients, presets

import { isArray } from "@thi.ng/checks/is-array";
import { assert } from "@thi.ng/errors/assert";
import { unsupported } from "@thi.ng/errors/unsupported";
const CONVERSIONS = {};
const defConversions = (mode, spec) => {
  for (let id in spec) {
    const val = spec[id];
    if (isArray(val)) {
      const [a, b, c, d] = val;
      spec[id] = val.length === 2 ? (out, src) => b(out, a(out, src)) : val.length === 3 ? (out, src) => c(out, b(out, a(out, src))) : (out, src) => d(out, c(out, b(out, a(out, src))));
    }
  }
  CONVERSIONS[mode] = { ...CONVERSIONS[mode], ...spec };
};
const convert = (res, src, destMode, srcMode) => {
  const spec = CONVERSIONS[destMode];
  assert(!!spec, `no conversions available for ${destMode}`);
  let $convert = spec[srcMode];
  return $convert ? $convert(res, src) : CONVERSIONS.rgb[srcMode] ? spec.rgb(res, CONVERSIONS.rgb[srcMode]([], src)) : unsupported(`can't convert: ${srcMode} -> ${destMode}`);
};
export {
  CONVERSIONS,
  convert,
  defConversions
};