CaffGeek/MBACNationals

/**
 * Functionality specific to Twenty Thirteen.
 *
 * Provides helper functions to enhance the theme experience.
 */

( function( $ ) {
    var body    = $( 'body' ),
        _window = $( window );

    /**
     * Adds a top margin to the footer if the sidebar widget area is higher
     * than the rest of the page, to help the footer always visually clear
     * the sidebar.
     */
    $( function() {
        if ( body.is( '.sidebar' ) ) {
            var sidebar   = $( '#secondary .widget-area' ),
                secondary = ( 0 === sidebar.length ) ? -40 : sidebar.height(),
                margin    = $( '#tertiary .widget-area' ).height() - $( '#content' ).height() - secondary;

            if ( margin > 0 && _window.innerWidth() > 999 ) {
                $( '#colophon' ).css( 'margin-top', margin + 'px' );
            }
        }
    } );

    /**
     * Enables menu toggle for small screens.
     */
    ( function() {
        var nav = $( '#site-navigation' ), button, menu;
        if ( ! nav ) {
            return;
        }

        button = nav.find( '.menu-toggle' );
        if ( ! button ) {
            return;
        }

        // Hide button if menu is missing or empty.
        menu = nav.find( '.nav-menu' );
        if ( ! menu || ! menu.children().length ) {
            button.hide();
            return;
        }

        button.on( 'click.twentythirteen', function() {
            nav.toggleClass( 'toggled-on' );
        } );

        // Better focus for hidden submenu items for accessibility.
        menu.find( 'a' ).on( 'focus.twentythirteen blur.twentythirteen', function() {
            $( this ).parents( '.menu-item, .page_item' ).toggleClass( 'focus' );
        } );
    } )();

    /**
     * Makes "skip to content" link work correctly in IE9 and Chrome for better
     * accessibility.
     *
     * @link http://www.nczonline.net/blog/2013/01/15/fixing-skip-to-content-links/
     */
    _window.on( 'hashchange.twentythirteen', function() {
        var element = document.getElementById( location.hash.substring( 1 ) );

        if ( element ) {
            if ( ! /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) {
                element.tabIndex = -1;
            }

            element.focus();
        }
    } );

    /**
     * Arranges footer widgets vertically.
     */
    if ( $.isFunction( $.fn.masonry ) ) {
        var columnWidth = body.is( '.sidebar' ) ? 228 : 245;

        $( '#secondary .widget-area' ).masonry( {
            itemSelector: '.widget',
            columnWidth: columnWidth,
            gutterWidth: 20,
            isRTL: body.is( '.rtl' )
        } );
    }
} )( jQuery );