ref: c0bf0d752a613e2004297136452a7e73acb397b6
dir: /cmd/gojafs/domino/domino-lib/DOMTokenList.js/
"use strict"; // DOMTokenList implementation based on https://github.com/Raynos/DOM-shim var utils = require('./utils'); module.exports = DOMTokenList; function DOMTokenList(getter, setter) { this._getString = getter; this._setString = setter; this._length = 0; this._lastStringValue = ''; this._update(); } Object.defineProperties(DOMTokenList.prototype, { length: { get: function() { return this._length; } }, item: { value: function(index) { var list = getList(this); if (index < 0 || index >= list.length) { return null; } return list[index]; }}, contains: { value: function(token) { token = String(token); // no error checking for contains() var list = getList(this); return list.indexOf(token) > -1; }}, add: { value: function() { var list = getList(this); for (var i = 0, len = arguments.length; i < len; i++) { var token = handleErrors(arguments[i]); if (list.indexOf(token) < 0) { list.push(token); } } // Note: as per spec, if handleErrors() throws any errors, we never // make it here and none of the changes take effect. // Also per spec: we run the "update steps" even if no change was // made (ie, if the token already existed) this._update(list); }}, remove: { value: function() { var list = getList(this); for (var i = 0, len = arguments.length; i < len; i++) { var token = handleErrors(arguments[i]); var index = list.indexOf(token); if (index > -1) { list.splice(index, 1); } } // Note: as per spec, if handleErrors() throws any errors, we never // make it here and none of the changes take effect. // Also per spec: we run the "update steps" even if no change was // made (ie, if the token wasn't previously present) this._update(list); }}, toggle: { value: function toggle(token, force) { token = handleErrors(token); if (this.contains(token)) { if (force === undefined || force === false) { this.remove(token); return false; } return true; } else { if (force === undefined || force === true) { this.add(token); return true; } return false; } }}, replace: { value: function replace(token, newToken) { // weird corner case of spec: if `token` contains whitespace, but // `newToken` is the empty string, we must throw SyntaxError not // InvalidCharacterError (sigh) if (String(newToken)==='') { utils.SyntaxError(); } token = handleErrors(token); newToken = handleErrors(newToken); var list = getList(this); var idx = list.indexOf(token); if (idx < 0) { // Note that, per spec, we do not run the update steps on this path. return false; } var idx2 = list.indexOf(newToken); if (idx2 < 0) { list[idx] = newToken; } else { // "replace the first instance of either `token` or `newToken` with // `newToken` and remove all other instances" if (idx < idx2) { list[idx] = newToken; list.splice(idx2, 1); } else { // idx2 is already `newToken` list.splice(idx, 1); } } this._update(list); return true; }}, toString: { value: function() { return this._getString(); }}, value: { get: function() { return this._getString(); }, set: function(v) { this._setString(v); this._update(); } }, // Called when the setter is called from outside this interface. _update: { value: function(list) { if (list) { fixIndex(this, list); this._setString(list.join(" ").trim()); } else { fixIndex(this, getList(this)); } this._lastStringValue = this._getString(); } }, }); function fixIndex(clist, list) { var oldLength = clist._length; var i; clist._length = list.length; for (i = 0; i < list.length; i++) { clist[i] = list[i]; } // Clear/free old entries. for (; i < oldLength; i++) { clist[i] = undefined; } } function handleErrors(token) { token = String(token); if (token === "") { utils.SyntaxError(); } if (/[ \t\r\n\f]/.test(token)) { utils.InvalidCharacterError(); } return token; } function toArray(clist) { var length = clist._length; var arr = Array(length); for (var i = 0; i < length; i++) { arr[i] = clist[i]; } return arr; } function getList(clist) { var strProp = clist._getString(); if (strProp === clist._lastStringValue) { return toArray(clist); } var str = strProp.replace(/(^[ \t\r\n\f]+)|([ \t\r\n\f]+$)/g, ''); if (str === "") { return []; } else { var seen = Object.create(null); return str.split(/[ \t\r\n\f]+/g).filter(function(n) { var key = '$' + n; if (seen[key]) { return false; } seen[key] = true; return true; }); } }