devextreme/dist/transpiled/core/utils/window.js

HTML5 JavaScript Component Suite for Responsive Web Development

"use strict";

/* global window */

var domAdapter = require("../dom_adapter");

var _hasWindow = typeof window !== "undefined";
var windowObject = _hasWindow && window;

if (!windowObject) {
    windowObject = {};
    windowObject.window = windowObject;
}

module.exports = {
    hasWindow: function hasWindow() {
        return _hasWindow;
    },

    getWindow: function getWindow() {
        return windowObject;
    },

    hasProperty: function hasProperty(prop) {
        return this.hasWindow() && prop in windowObject;
    },

    defaultScreenFactorFunc: function defaultScreenFactorFunc(width) {
        if (width < 768) {
            return "xs";
        } else if (width < 992) {
            return "sm";
        } else if (width < 1200) {
            return "md";
        } else {
            return "lg";
        }
    },

    getCurrentScreenFactor: function getCurrentScreenFactor(screenFactorCallback) {
        var screenFactorFunc = screenFactorCallback || this.defaultScreenFactorFunc;
        var windowWidth = domAdapter.getDocumentElement()["clientWidth"];

        return screenFactorFunc(windowWidth);
    },

    openWindow: function openWindow() {
        if (this.hasProperty("open")) {
            return windowObject.open();
        }

        return null;
    },

    getNavigator: function getNavigator() {
        return this.hasWindow() ? windowObject.navigator : {
            userAgent: ""
        };
    }
};