1 /*
  2  * isSpace.js - Character type is space char
  3  *
  4  * Copyright © 2012-2015, 2018, JEDLSoft
  5  *
  6  * Licensed under the Apache License, Version 2.0 (the "License");
  7  * you may not use this file except in compliance with the License.
  8  * You may obtain a copy of the License at
  9  *
 10  *     http://www.apache.org/licenses/LICENSE-2.0
 11  *
 12  * Unless required by applicable law or agreed to in writing, software
 13  * distributed under the License is distributed on an "AS IS" BASIS,
 14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15  *
 16  * See the License for the specific language governing permissions and
 17  * limitations under the License.
 18  */
 19 
 20 // !data ctype ctype_z
 21 
 22 var ilib = require("./ilib.js");
 23 
 24 var CType = require("./CType.js");
 25 var IString = require("./IString.js");
 26 
 27 /**
 28  * Return whether or not the first character is a whitespace character.<p>
 29  *
 30  * @static
 31  * @param {string|IString|number} ch character or code point to examine
 32  * @return {boolean} true if the first character is a whitespace character.
 33  */
 34 var isSpace = function (ch) {
 35     var num;
 36     switch (typeof(ch)) {
 37         case 'number':
 38             num = ch;
 39             break;
 40         case 'string':
 41             num = IString.toCodePoint(ch, 0);
 42             break;
 43         case 'undefined':
 44             return false;
 45         default:
 46             num = ch._toCodePoint(0);
 47             break;
 48     }
 49 
 50     return ilib.data.ctype && ilib.data.ctype_z ?
 51         (CType._inRange(num, 'space', ilib.data.ctype) ||
 52         CType._inRange(num, 'Zs', ilib.data.ctype_z) ||
 53         CType._inRange(num, 'Zl', ilib.data.ctype_z) ||
 54         CType._inRange(num, 'Zp', ilib.data.ctype_z)) :
 55         (ch === ' ' || num === 0xA0 ||
 56         (num >= 0x09 && num <= 0x0D));
 57 };
 58 
 59 /**
 60  * @protected
 61  * @param {boolean} sync
 62  * @param {Object|undefined} loadParams
 63  * @param {function(*)|undefined} onLoad
 64  */
 65 isSpace._init = function (sync, loadParams, onLoad) {
 66     CType._load("ctype_z", sync, loadParams, function () {
 67         CType._init(sync, loadParams, onLoad);
 68     });
 69 };
 70 
 71 module.exports = isSpace;