tone
Version:
A Web Audio framework for making interactive music in the browser.
99 lines • 3.07 kB
JavaScript
import { isAudioBuffer, isAudioNode, isAudioParam } from "./AdvancedTypeCheck";
import { isDefined, isObject, isUndef } from "./TypeCheck";
/**
* Some objects should not be merged
*/
function noCopy(key, arg) {
return key === "value" || isAudioParam(arg) || isAudioNode(arg) || isAudioBuffer(arg);
}
export function deepMerge(target, ...sources) {
if (!sources.length) {
return target;
}
const source = sources.shift();
if (isObject(target) && isObject(source)) {
for (const key in source) {
if (noCopy(key, source[key])) {
target[key] = source[key];
}
else if (isObject(source[key])) {
if (!target[key]) {
Object.assign(target, { [key]: {} });
}
deepMerge(target[key], source[key]);
}
else {
Object.assign(target, { [key]: source[key] });
}
}
}
// @ts-ignore
return deepMerge(target, ...sources);
}
/**
* Returns true if the two arrays have the same value for each of the elements
*/
export function deepEquals(arrayA, arrayB) {
return arrayA.length === arrayB.length && arrayA.every((element, index) => arrayB[index] === element);
}
/**
* Convert an args array into an object.
*/
export function optionsFromArguments(defaults, argsArray, keys = [], objKey) {
const opts = {};
const args = Array.from(argsArray);
// if the first argument is an object and has an object key
if (isObject(args[0]) && objKey && !Reflect.has(args[0], objKey)) {
// if it's not part of the defaults
const partOfDefaults = Object.keys(args[0]).some(key => Reflect.has(defaults, key));
if (!partOfDefaults) {
// merge that key
deepMerge(opts, { [objKey]: args[0] });
// remove the obj key from the keys
keys.splice(keys.indexOf(objKey), 1);
// shift the first argument off
args.shift();
}
}
if (args.length === 1 && isObject(args[0])) {
deepMerge(opts, args[0]);
}
else {
for (let i = 0; i < keys.length; i++) {
if (isDefined(args[i])) {
opts[keys[i]] = args[i];
}
}
}
return deepMerge(defaults, opts);
}
/**
* Return this instances default values by calling Constructor.getDefaults()
*/
export function getDefaultsFromInstance(instance) {
return instance.constructor.getDefaults();
}
/**
* Returns the fallback if the given object is undefined.
* Take an array of arguments and return a formatted options object.
*/
export function defaultArg(given, fallback) {
if (isUndef(given)) {
return fallback;
}
else {
return given;
}
}
/**
* Remove all of the properties belonging to omit from obj.
*/
export function omitFromObject(obj, omit) {
omit.forEach(prop => {
if (Reflect.has(obj, prop)) {
delete obj[prop];
}
});
return obj;
}
//# sourceMappingURL=Defaults.js.map