https://ttsneuronala.elhuyar.eus/static/barrak/base/js/tts/classList.js

1/*
2 * classList.js: Cross-browser full element.classList implementation.
3 * 2014-01-07
4 *
5 * By Eli Grey, http://eligrey.com
6 * Public Domain.
7 * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
8 */
9
10/*global self, document, DOMException */
11
12/*! @source http://purl.eligrey.com/github/classList.js/blob/master/classList.js*/
13
14if ("document" in self && !("classList" in document.createElement("_"))) {
15
16(function (view) {
17
18"use strict";
19
20if (!('Element' in view)) return;
21
22var
23	  classListProp = "classList"
24	, protoProp = "prototype"
25	, elemCtrProto = view.Element[protoProp]
26	, objCtr = Object
27	, strTrim = String[protoProp].trim || function () {
28		return this.replace(/^\s+|\s+$/g, "");
29	}
30	, arrIndexOf = Array[protoProp].indexOf || function (item) {
31		var
32			  i = 0
33			, len = this.length
34		;
35		for (; i < len; i++) {
36			if (i in this && this[i] === item) {
37				return i;
38			}
39		}
40		return -1;
41	}
42	// Vendors: please allow content code to instantiate DOMExceptions
43	, DOMEx = function (type, message) {
44		this.name = type;
45		this.code = DOMException[type];
46		this.message = message;
47	}
48	, checkTokenAndGetIndex = function (classList, token) {
49		if (token === "") {
50			throw new DOMEx(
51				  "SYNTAX_ERR"
52				, "An invalid or illegal string was specified"
53			);
54		}
55		if (/\s/.test(token)) {
56			throw new DOMEx(
57				  "INVALID_CHARACTER_ERR"
58				, "String contains an invalid character"
59			);
60		}
61		return arrIndexOf.call(classList, token);
62	}
63	, ClassList = function (elem) {
64		var
65			  trimmedClasses = strTrim.call(elem.getAttribute("class") || "")
66			, classes = trimmedClasses ? trimmedClasses.split(/\s+/) : []
67			, i = 0
68			, len = classes.length
69		;
70		for (; i < len; i++) {
71			this.push(classes[i]);
72		}
73		this._updateClassName = function () {
74			elem.setAttribute("class", this.toString());
75		};
76	}
77	, classListProto = ClassList[protoProp] = []
78	, classListGetter = function () {
79		return new ClassList(this);
80	}
81;
82// Most DOMException implementations don't allow calling DOMException's toString()
83// on non-DOMExceptions. Error's toString() is sufficient here.
84DOMEx[protoProp] = Error[protoProp];
85classListProto.item = function (i) {
86	return this[i] || null;
87};
88classListProto.contains = function (token) {
89	token += "";
90	return checkTokenAndGetIndex(this, token) !== -1;
91};
92classListProto.add = function () {
93	var
94		  tokens = arguments
95		, i = 0
96		, l = tokens.length
97		, token
98		, updated = false
99	;
100	do {
101		token = tokens[i] + "";
102		if (checkTokenAndGetIndex(this, token) === -1) {
103			this.push(token);
104			updated = true;
105		}
106	}
107	while (++i < l);
108
109	if (updated) {
110		this._updateClassName();
111	}
112};
113classListProto.remove = function () {
114	var
115		  tokens = arguments
116		, i = 0
117		, l = tokens.length
118		, token
119		, updated = false
120	;
121	do {
122		token = tokens[i] + "";
123		var index = checkTokenAndGetIndex(this, token);
124		if (index !== -1) {
125			this.splice(index, 1);
126			updated = true;
127		}
128	}
129	while (++i < l);
130
131	if (updated) {
132		this._updateClassName();
133	}
134};
135classListProto.toggle = function (token, forse) {
136	token += "";
137
138	var
139		  result = this.contains(token)
140		, method = result ?
141			forse !== true && "remove"
142		:
143			forse !== false && "add"
144	;
145
146	if (method) {
147		this[method](token);
148	}
149
150	return !result;
151};
152classListProto.toString = function () {
153	return this.join(" ");
154};
155
156if (objCtr.defineProperty) {
157	var classListPropDesc = {
158		  get: classListGetter
159		, enumerable: true
160		, configurable: true
161	};
162	try {
163		objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
164	} catch (ex) { // IE 8 doesn't support enumerable:true
165		if (ex.number === -0x7FF5EC54) {
166			classListPropDesc.enumerable = false;
167			objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
168		}
169	}
170} else if (objCtr[protoProp].__defineGetter__) {
171	elemCtrProto.__defineGetter__(classListProp, classListGetter);
172}
173
174}(self));
175
176}