sebastian-software/core

/*
==================================================================================================
  Core - JavaScript Foundation
  Copyright 2010-2012 Zynga Inc.
  Copyright 2012-2014 Sebastian Werner
==================================================================================================
*/

"use strict";

(function(document) {

    var root = document.documentElement;
    var request, cancel, is;

    // See also: http://hacks.mozilla.org/2012/01/using-the-fullscreen-api-in-web-browsers/
    if (root.requestFullScreen)
    {
        /**
         * Requests full screen mode for given @element {Element?document.documentElement}.
         */
        request = function(element) {
            (element||root).requestFullScreen();
        };

        /**
         * Cancels full screen mode.
         */
        cancel = function() {
            document.cancelFullScreen();
        };

        /**
         * {Boolean} Returns whether the browser is in full screen mode.
         */
        is = function() {
            return document.fullScreenElement != null;
        };
    }
    else
    {
        var prefix = jasy.Env.select("engine", {
            trident: 'ms',
            gecko: 'moz',
            webkit: 'webkit',
            presto: 'o'
        });

        var baseName = "FullScreen";
        var requestName = prefix + "Request" + baseName;

        if (root[requestName])
        {
            var cancelName = prefix + "Cancel" + baseName;
            var hasName = prefix + baseName
            var isName = prefix + "Is" + baseName;

            request = function(element) {
                (element||root)[requestName]();
            };

            cancel = function() {
                document[cancelName]();
            };

            is = function() {
                return document[hasName] || document[isName];
            };
        }
        else
        {
            request = cancel = is = function() {
                return false;
            };
        }
    }


    /**
     * Collection of methods to deal with different full screen APIs in browsers.
     */
    core.Module("core.bom.FullScreen", {

        request: request,
        cancel: cancel,
        is: is

    });

})(document);