githubmirror/brackets

src/utils/ValidationUtils.js
83 строки3 KB
Marcel Gerber
ValidationUtils improvements
20 ноя 2014, 19:08
20 ноя 2014, 19:08d9bf2d7
/*
 * Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.
 *  
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the 
 * Software is furnished to do so, subject to the following conditions:
 *  
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *  
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 * 
 */


/*jslint vars: true, plusplus: true, devel: true, nomen: true, indent: 4, maxerr: 50 */
/*global define */

define(function (require, exports, module) {
    "use strict";

    
    /**
     * Used to validate whether type of unknown value is an integer.
     * 
     * @param {*} value Value for which to validate its type
     * @return {boolean} true if value is a finite integer
     */
    function isInteger(value) {
        // Validate value is a number
        if (typeof (value) !== "number" || isNaN(parseInt(value, 10))) {
            return false;
        }

        // Validate number is an integer
        if (Math.floor(value) !== value) {
            return false;
        }

        // Validate number is finite
        if (!isFinite(value)) {
            return false;
        }

        return true;
    }

    /**
     * Used to validate whether type of unknown value is an integer, and, if so,
     * is it within the option lower and upper limits.
     * 
     * @param {*} value Value for which to validate its type
     * @param {number=} lowerLimit Optional lower limit (inclusive)
     * @param {number=} upperLimit Optional upper limit (inclusive)
     * @return {boolean} true if value is an interger, and optionally in specified range.
     */
    function isIntegerInRange(value, lowerLimit, upperLimit) {
        // Validate value is an integer
        if (!isInteger(value)) {
            return false;
        }

        // Validate integer is in range
        var hasLowerLimt = (typeof (lowerLimit) === "number"),
            hasUpperLimt = (typeof (upperLimit) === "number");

        return ((!hasLowerLimt || value >= lowerLimit) && (!hasUpperLimt || value <= upperLimit));
    }


    // Define public API
    exports.isInteger               = isInteger;
    exports.isIntegerInRange        = isIntegerInRange;
});