HummingBirdAnimeClient/public/js/base/classList.js

/*
 * classList.js: Cross-browser full element.classList implementation.
 * 2014-07-23
 *
 * By Eli Grey, http://eligrey.com
 * Public Domain.
 * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
 */

/*global self, document, DOMException */

/*! @source http://purl.eligrey.com/github/classList.js/blob/master/classList.js*/

if ("document" in self) {

	// Full polyfill for browsers with no classList support
	if (!("classList" in document.createElement("_"))) {

		(function(view) {

			"use strict";

			if (!('Element' in view)) return;

			var
				classListProp = "classList",
				protoProp = "prototype",
				elemCtrProto = view.Element[protoProp],
				objCtr = Object,
				strTrim = String[protoProp].trim || function() {
					return this.replace(/^\s+|\s+$/g, "");
				},
				arrIndexOf = Array[protoProp].indexOf || function(item) {
					var
						i = 0,
						len = this.length;
					for (; i < len; i++) {
						if (i in this && this[i] === item) {
							return i;
						}
					}
					return -1;
				}
				// Vendors: please allow content code to instantiate DOMExceptions
				,
				DOMEx = function(type, message) {
					this.name = type;
					this.code = DOMException[type];
					this.message = message;
				},
				checkTokenAndGetIndex = function(classList, token) {
					if (token === "") {
						throw new DOMEx(
							"SYNTAX_ERR", "An invalid or illegal string was specified"
						);
					}
					if (/\s/.test(token)) {
						throw new DOMEx(
							"INVALID_CHARACTER_ERR", "String contains an invalid character"
						);
					}
					return arrIndexOf.call(classList, token);
				},
				ClassList = function(elem) {
					var
						trimmedClasses = strTrim.call(elem.getAttribute("class") || ""),
						classes = trimmedClasses ? trimmedClasses.split(/\s+/) : [],
						i = 0,
						len = classes.length;
					for (; i < len; i++) {
						this.push(classes[i]);
					}
					this._updateClassName = function() {
						elem.setAttribute("class", this.toString());
					};
				},
				classListProto = ClassList[protoProp] = [],
				classListGetter = function() {
					return new ClassList(this);
				};
			// Most DOMException implementations don't allow calling DOMException's toString()
			// on non-DOMExceptions. Error's toString() is sufficient here.
			DOMEx[protoProp] = Error[protoProp];
			classListProto.item = function(i) {
				return this[i] || null;
			};
			classListProto.contains = function(token) {
				token += "";
				return checkTokenAndGetIndex(this, token) !== -1;
			};
			classListProto.add = function() {
				var
					tokens = arguments,
					i = 0,
					l = tokens.length,
					token, updated = false;
				do {
					token = tokens[i] + "";
					if (checkTokenAndGetIndex(this, token) === -1) {
						this.push(token);
						updated = true;
					}
				}
				while (++i < l);

				if (updated) {
					this._updateClassName();
				}
			};
			classListProto.remove = function() {
				var
					tokens = arguments,
					i = 0,
					l = tokens.length,
					token, updated = false,
					index;
				do {
					token = tokens[i] + "";
					index = checkTokenAndGetIndex(this, token);
					while (index !== -1) {
						this.splice(index, 1);
						updated = true;
						index = checkTokenAndGetIndex(this, token);
					}
				}
				while (++i < l);

				if (updated) {
					this._updateClassName();
				}
			};
			classListProto.toggle = function(token, force) {
				token += "";

				var
					result = this.contains(token),
					method = result ?
					force !== true && "remove" :
					force !== false && "add";

				if (method) {
					this[method](token);
				}

				if (force === true || force === false) {
					return force;
				} else {
					return !result;
				}
			};
			classListProto.toString = function() {
				return this.join(" ");
			};

			if (objCtr.defineProperty) {
				var classListPropDesc = {
					get: classListGetter,
					enumerable: true,
					configurable: true
				};
				try {
					objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
				} catch (ex) { // IE 8 doesn't support enumerable:true
					if (ex.number === -0x7FF5EC54) {
						classListPropDesc.enumerable = false;
						objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
					}
				}
			} else if (objCtr[protoProp].__defineGetter__) {
				elemCtrProto.__defineGetter__(classListProp, classListGetter);
			}

		}(self));

	} else {
		// There is full or partial native classList support, so just check if we need
		// to normalize the add/remove and toggle APIs.

		(function() {
			"use strict";

			var testElement = document.createElement("_");

			testElement.classList.add("c1", "c2");

			// Polyfill for IE 10/11 and Firefox <26, where classList.add and
			// classList.remove exist but support only one argument at a time.
			if (!testElement.classList.contains("c2")) {
				var createMethod = function(method) {
					var original = DOMTokenList.prototype[method];

					DOMTokenList.prototype[method] = function(token) {
						var i, len = arguments.length;

						for (i = 0; i < len; i++) {
							token = arguments[i];
							original.call(this, token);
						}
					};
				};
				createMethod('add');
				createMethod('remove');
			}

			testElement.classList.toggle("c3", false);

			// Polyfill for IE 10 and Firefox <24, where classList.toggle does not
			// support the second argument.
			if (testElement.classList.contains("c3")) {
				var _toggle = DOMTokenList.prototype.toggle;

				DOMTokenList.prototype.toggle = function(token, force) {
					if (1 in arguments && !this.contains(token) === !force) {
						return force;
					} else {
						return _toggle.call(this, token);
					}
				};

			}

			testElement = null;
		}());

	}

}