@tonaljs/interval/dist/index.mjs

Parse and manipulate music intervals

// index.ts
import { distance as dist } from "@tonaljs/pitch-distance";
import {
  coordToInterval,
  interval as props
} from "@tonaljs/pitch-interval";
function names() {
  return "1P 2M 3M 4P 5P 6m 7m".split(" ");
}
var get = props;
var name = (name2) => props(name2).name;
var semitones = (name2) => props(name2).semitones;
var quality = (name2) => props(name2).q;
var num = (name2) => props(name2).num;
function simplify(name2) {
  const i = props(name2);
  return i.empty ? "" : i.simple + i.q;
}
function invert(name2) {
  const i = props(name2);
  if (i.empty) {
    return "";
  }
  const step = (7 - i.step) % 7;
  const alt = i.type === "perfectable" ? -i.alt : -(i.alt + 1);
  return props({ step, alt, oct: i.oct, dir: i.dir }).name;
}
var IN = [1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 7, 7];
var IQ = "P m M m M P d P m M m M".split(" ");
function fromSemitones(semitones2) {
  const d = semitones2 < 0 ? -1 : 1;
  const n = Math.abs(semitones2);
  const c = n % 12;
  const o = Math.floor(n / 12);
  return d * (IN[c] + 7 * o) + IQ[c];
}
var distance = dist;
var add = combinator((a, b) => [a[0] + b[0], a[1] + b[1]]);
var addTo = (interval) => (other) => add(interval, other);
var subtract = combinator((a, b) => [a[0] - b[0], a[1] - b[1]]);
function transposeFifths(interval, fifths) {
  const ivl = get(interval);
  if (ivl.empty) return "";
  const [nFifths, nOcts, dir] = ivl.coord;
  return coordToInterval([nFifths + fifths, nOcts, dir]).name;
}
var interval_default = {
  names,
  get,
  name,
  num,
  semitones,
  quality,
  fromSemitones,
  distance,
  invert,
  simplify,
  add,
  addTo,
  subtract,
  transposeFifths
};
function combinator(fn) {
  return (a, b) => {
    const coordA = props(a).coord;
    const coordB = props(b).coord;
    if (coordA && coordB) {
      const coord = fn(coordA, coordB);
      return coordToInterval(coord).name;
    }
  };
}
export {
  add,
  addTo,
  interval_default as default,
  distance,
  fromSemitones,
  get,
  invert,
  name,
  names,
  num,
  quality,
  semitones,
  simplify,
  subtract,
  transposeFifths
};
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