function update_simple_ordering_callback(response) {
    if ( 'children' === response ) {
        window.location.reload();
        return;
    }

    var changes = jQuery.parseJSON( response );

    var new_pos = changes.new_pos;
    for ( var key in new_pos ) {
        if ( 'next' === key ) {
            continue;
        }

        var inline_key = document.getElementById('inline_' + key);
        if ( null !== inline_key && new_pos.hasOwnProperty(key) ) {
            var dom_menu_order = inline_key.querySelector('.menu_order');

            if ( undefined !== new_pos[key]['menu_order'] ) {
                if ( null !== dom_menu_order ) {
                    dom_menu_order.innerHTML = new_pos[key]['menu_order'];
                }

                var dom_post_parent = inline_key.querySelector('.post_parent');
                if ( null !== dom_post_parent ) {
                    dom_post_parent.innerHTML = new_pos[key]['post_parent'];
                }

                var post_title = null;
                var dom_post_title = inline_key.querySelector('.post_title');
                if ( null !== dom_post_title ) {
                    post_title = dom_post_title.innerHTML;
                }

                var dashes = 0;
                while ( dashes < new_pos[key]['depth'] ) {
                    post_title = '&mdash; ' + post_title;
                    dashes++;
                }
                var dom_row_title = inline_key.parentNode.querySelector('.row-title');
                if ( null !== dom_row_title && null !== post_title ) {
                    dom_row_title.innerHTML = post_title;
                }
            } else if ( null !== dom_menu_order ) {
                dom_menu_order.innerHTML = new_pos[key];
            }
        }
    }

    if ( changes.next ) {
        jQuery.post( ajaxurl, {
            action: 'simple_page_ordering',
            id: changes.next['id'],
            previd: changes.next['previd'],
            nextid: changes.next['nextid'],
            start: changes.next['start'],
            excluded: changes.next['excluded']
        }, update_simple_ordering_callback );
    } else {
        jQuery('.spo-updating-row').removeClass('spo-updating-row');
        sortable_post_table.removeClass('spo-updating').sortable('enable');
    }
}

var sortable_post_table = jQuery(".wp-list-table tbody");
sortable_post_table.sortable({
    items: '> tr',
    cursor: 'move',
    axis: 'y',
    containment: 'table.widefat',
    cancel: '.inline-edit-row',
    distance: 2,
    opacity: .8,
    tolerance: 'pointer',
    start: function(e, ui){
        if ( typeof(inlineEditPost) !== 'undefined' ) {
            inlineEditPost.revert();
        }
        ui.placeholder.height(ui.item.height());
    },
    helper: function(e, ui) {
        var children = ui.children();
        for ( var i=0; i<children.length; i++ ) {
            var selector = jQuery(children[i]);
            selector.width( selector.width() );
        };
        return ui;
    },
    stop: function(e, ui) {
        // remove fixed widths
        ui.item.children().css('width','');
    },
    update: function(e, ui) {
        sortable_post_table.sortable('disable').addClass('spo-updating');
        ui.item.addClass('spo-updating-row');

        var postid = ui.item[0].id.substr(5); // post id

        var prevpostid = false;
        var prevpost = ui.item.prev();
        if ( prevpost.length > 0 ) {
            prevpostid = prevpost.attr('id').substr(5);
        }

        var nextpostid = false;
        var nextpost = ui.item.next();
        if ( nextpost.length > 0 ) {
            nextpostid = nextpost.attr('id').substr(5);
        }

        // go do the sorting stuff via ajax
        jQuery.post( ajaxurl, { action: 'simple_page_ordering', id: postid, previd: prevpostid, nextid: nextpostid }, update_simple_ordering_callback );

        // fix cell colors
        var table_rows = document.querySelectorAll('tr.iedit'),
            table_row_count = table_rows.length;
        while( table_row_count-- ) {
            if ( 0 === table_row_count%2 ) {
                jQuery(table_rows[table_row_count]).addClass('alternate');
            } else {
                jQuery(table_rows[table_row_count]).removeClass('alternate');
            }
        }
    }
});