Tone.js/Tone/shim/WaveShaperNode.js

import Tone from "../core/Tone";
import "../shim/AudioContext";

if (Tone.supported && !Tone.global.AudioContext.prototype._native_createWaveShaper){

	//fixes safari only bug which is still present in 11
	var ua = navigator.userAgent.toLowerCase();
	var isSafari = ua.includes("safari") && !ua.includes("chrome");
	if (isSafari){

		var WaveShaperNode = function(context){

			this._internalNode = this.input = this.output = context._native_createWaveShaper();

			this._curve = null;

			for (var prop in this._internalNode){
				this._defineProperty(this._internalNode, prop);
			}
		};

		Object.defineProperty(WaveShaperNode.prototype, "curve", {
			"get" : function(){
				return this._curve;
			},
			"set" : function(curve){
				this._curve = curve;
				var array = new Float32Array(curve.length+1);
				array.set(curve, 1);
				array[0] = curve[0];
				this._internalNode.curve = array;
			}
		});

		WaveShaperNode.prototype._defineProperty = function(context, prop){
			if (Tone.isUndef(this[prop])){
				Object.defineProperty(this, prop, {
					"get" : function(){
						if (typeof context[prop] === "function"){
							return context[prop].bind(context);
						} else {
							return context[prop];
						}
					},
					"set" : function(val){
						context[prop] = val;
					}
				});
			}
		};

		Tone.global.AudioContext.prototype._native_createWaveShaper = Tone.global.AudioContext.prototype.createWaveShaper;
		Tone.global.AudioContext.prototype.createWaveShaper = function(){
			return new WaveShaperNode(this);
		};
	}
}