CaffGeek/MBACNationals

/* global _wpCustomizeLoaderSettings */
window.wp = window.wp || {};

(function( exports, $ ){
    var api = wp.customize,
        Loader;

    $.extend( $.support, {
        history: !! ( window.history && history.pushState ),
        hashchange: ('onhashchange' in window) && (document.documentMode === undefined || document.documentMode > 7)
    });

    Loader = $.extend( {}, api.Events, {
        initialize: function() {
            this.body = $( document.body );

            // Ensure the loader is supported.
            // Check for settings, postMessage support, and whether we require CORS support.
            if ( ! Loader.settings || ! $.support.postMessage || ( ! $.support.cors && Loader.settings.isCrossDomain ) ) {
                return;
            }

            this.window  = $( window );
            this.element = $( '<div id="customize-container" />' ).appendTo( this.body );

            this.bind( 'open', this.overlay.show );
            this.bind( 'close', this.overlay.hide );

            $('#wpbody').on( 'click', '.load-customize', function( event ) {
                event.preventDefault();

                // Store a reference to the link that opened the customizer.
                Loader.link = $(this);
                // Load the theme.
                Loader.open( Loader.link.attr('href') );
            });

            // Add navigation listeners.
            if ( $.support.history )
                this.window.on( 'popstate', Loader.popstate );

            if ( $.support.hashchange ) {
                this.window.on( 'hashchange', Loader.hashchange );
                this.window.triggerHandler( 'hashchange' );
            }
        },

        popstate: function( e ) {
            var state = e.originalEvent.state;
            if ( state && state.customize )
                Loader.open( state.customize );
            else if ( Loader.active )
                Loader.close();
        },

        hashchange: function() {
            var hash = window.location.toString().split('#')[1];

            if ( hash && 0 === hash.indexOf( 'wp_customize=on' ) )
                Loader.open( Loader.settings.url + '?' + hash );

            if ( ! hash && ! $.support.history )
                Loader.close();
        },

        open: function( src ) {
            var hash;

            if ( this.active )
                return;

            // Load the full page on mobile devices.
            if ( Loader.settings.browser.mobile )
                return window.location = src;

            this.active = true;
            this.body.addClass('customize-loading');

            this.iframe = $( '<iframe />', { src: src }).appendTo( this.element );
            this.iframe.one( 'load', this.loaded );

            // Create a postMessage connection with the iframe.
            this.messenger = new api.Messenger({
                url: src,
                channel: 'loader',
                targetWindow: this.iframe[0].contentWindow
            });

            // Wait for the connection from the iframe before sending any postMessage events.
            this.messenger.bind( 'ready', function() {
                Loader.messenger.send( 'back' );
            });

            this.messenger.bind( 'close', function() {
                if ( $.support.history )
                    history.back();
                else if ( $.support.hashchange )
                    window.location.hash = '';
                else
                    Loader.close();
            });

            this.messenger.bind( 'activated', function( location ) {
                if ( location )
                    window.location = location;
            });

            hash = src.split('?')[1];

            // Ensure we don't call pushState if the user hit the forward button.
            if ( $.support.history && window.location.href !== src )
                history.pushState( { customize: src }, '', src );
            else if ( ! $.support.history && $.support.hashchange && hash )
                window.location.hash = 'wp_customize=on&' + hash;

            this.trigger( 'open' );
        },

        opened: function() {
            Loader.body.addClass( 'customize-active full-overlay-active' );
        },

        close: function() {
            if ( ! this.active )
                return;
            this.active = false;

            this.trigger( 'close' );

            // Return focus to link that was originally clicked.
            if ( this.link )
                this.link.focus();
        },

        closed: function() {
            Loader.iframe.remove();
            Loader.messenger.destroy();
            Loader.iframe    = null;
            Loader.messenger = null;
            Loader.body.removeClass( 'customize-active full-overlay-active' ).removeClass( 'customize-loading' );
        },

        loaded: function() {
            Loader.body.removeClass('customize-loading');
        },

        overlay: {
            show: function() {
                this.element.fadeIn( 200, Loader.opened );
            },

            hide: function() {
                this.element.fadeOut( 200, Loader.closed );
            }
        }
    });

    $( function() {
        Loader.settings = _wpCustomizeLoaderSettings;
        Loader.initialize();
    });

    // Expose the API to the world.
    api.Loader = Loader;
})( wp, jQuery );