'use strict';

/* --------------------------------------------------------------
 responsive.js 2016-02-23
 Gambio GmbH
 http://www.gambio.de
 Copyright (c) 2016 Gambio GmbH
 Released under the GNU General Public License (Version 2)
 [http://www.gnu.org/licenses/gpl-2.0.html]
 --------------------------------------------------------------
 */

jse.libs.theme.responsive = jse.libs.theme.responsive || {};

/**
 * ## Honeygrid Responsive Utilities Library
 *
 * Library to make the theme responsive. This function depends on jQuery.
 *
 * @module Honeygrid/Libs/responsive
 * @exports jse.libs.theme.responsive
 */
(function (exports) {

    'use strict';

    // ########## VARIABLE INITIALIZATION ##########

    var $body = $('body'),
        current = null,
        timer = null,
        breakpoints = [{
        id: 20,
        name: 'too small',
        width: 480
    }, {
        id: 40,
        name: 'xs',
        width: 768
    }, {
        id: 60,
        name: 'sm',
        width: 992
    }, {
        id: 80,
        name: 'md',
        width: 1200
    }, {
        id: 100,
        name: 'lg',
        width: null
    }];

    // ########## EVENT HANDLER ##########

    /**
     * Returns the breakpoint of the current page,
     * false if no breakpoint could be identified.
     *
     * @return Breakpoint
     */
    var _getBreakpoint = function _getBreakpoint() {
        var width = window.innerWidth,
            result = null;

        // check if page is loaded inside an iframe and, if appropriate, set the iframe's width
        if (window.self !== window.top) {
            document.body.style.overflow = 'hidden';
            width = document.body.clientWidth;
            document.body.style.overflow = 'visible';
        }

        if (width === 0) {
            timer = setTimeout(function () {
                _getBreakpoint();
            }, 10);
            current = $.extend({}, breakpoints[0]); // set default breakpoint value
            return false;
        }

        $.each(breakpoints, function (i, v) {
            if (!v.width || width < v.width) {

                result = $.extend({}, v);
                return false;
            }
        });

        if (result && (!current || current.id !== result.id)) {
            current = $.extend({}, result);
            clearTimeout(timer);
            timer = setTimeout(function () {
                // @todo This lib depends on the existence of the events lib (both are loaded asynchronously).
                if (jse.libs.theme.events !== undefined) {
                    $body.trigger(jse.libs.theme.events.BREAKPOINT(), current);
                }
            }, 10);
        }
    };

    // ########## INITIALIZATION ##########

    _getBreakpoint();

    $(window).on('resize', _getBreakpoint);

    /**
     * @todo rename method to "getBreakpoint".
     */
    exports.breakpoint = function () {
        return current;
    };
})(jse.libs.theme.responsive);

jse.libs.template = jse.libs.template || {};
jse.libs.template.responsive = jse.libs.theme.responsive;
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