lotus / inc /lilyParser /idioms.ts
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commit lotus dist.
d605f27
const PHONETS = "cdefgab";
const PHONETS_ALIAS = {
h: "b",
};
const phonetDifferToShift = differ => differ > 3 ? -1 : (differ < -3 ? 1 : 0);
const PHONET_VALUES = {
c: 0, d: 2, e: 4, f: 5, g: 7, a: 9, b: 11,
};
const SHARP_ALTERS = [
"is", "d", "s", "iss", "k", "sharp",
];
const FLAT_ALTERS = [
"es", "b", "f", "ess", "flat",
];
// in Dutch, 'as', 'es' means a flat/e flat, that's not supported here
const DOUBLE_SHARP_ALTERS = [
...SHARP_ALTERS.map(word => word + word), "x",
];
const DOUBLE_FLAT_ALTERS = [
...FLAT_ALTERS.map(word => word + word), "ses",
];
const alterTablize = (list, value) => list.reduce((table, word) => ((table[word] = value), table), {});
const ALTER_VALUES = {
...alterTablize(SHARP_ALTERS, 1),
...alterTablize(FLAT_ALTERS, -1),
...alterTablize(DOUBLE_SHARP_ALTERS, 2),
...alterTablize(DOUBLE_FLAT_ALTERS, -2),
};
const FIFTH_PHONETS = "fcgdaeb";
export {
PHONETS,
PHONETS_ALIAS,
phonetDifferToShift,
PHONET_VALUES,
ALTER_VALUES,
FIFTH_PHONETS,
};