کد:
<?php/**
* Defines the custom walker that adds description to the display of our Header Menu
*/
class Graphene_Description_Walker extends Walker_Nav_Menu {
function start_el( &$output, $item, $depth, $args ) {
global $wp_query;
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
$class_names = $value = '';
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
$class_names = ' class="'. esc_attr( $class_names ) . '"';
$output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';
$attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : '';
$attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : '';
$attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : '';
$attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : '';
$prepend = '<strong>';
$append = '</strong>';
// Don't show description if it's longer than the length
$desc_length = apply_filters( 'graphene_menu_desc_length', 50 );
if ( strlen( $item->description ) > $desc_length)
$description = '';
else
$description = ! empty( $item->description ) ? '<span>'.esc_attr( $item->description ).'</span>' : '';
if ( $depth != 0 ) {
$description = $append = $prepend = "";
}
$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
$item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append;
$item_output .= $description.$args->link_after;
$item_output .= '</a>';
$item_output .= $args->after;
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
}
}
/**
* Define the callback menu, if there is no custom menu.
* This menu automatically lists all Pages as menu items, including their direct
* direct descendant, which will only be displayed for the current parent.
*/
if ( ! function_exists( 'graphene_default_menu' ) ) :
function graphene_default_menu(){ global $graphene_settings; ?>
<ul id="header-menu" class="<?php echo graphene_get_menu_class('menu clearfix default-menu'); ?>">
<?php if (get_option( 'show_on_front' ) == 'posts' ) : ?>
<li <?php if ( is_single() || is_front_page() ) { echo 'class="current_page_item current-menu-item"'; } ?>>
<a href="<?php echo get_home_url(); ?>">
<strong><?php _e( 'Home','graphene' ); ?></strong>
<?php if ( $graphene_settings['navmenu_home_desc']) {echo '<span>'.$graphene_settings['navmenu_home_desc'].'</span>';} ?>
</a>
</li>
<?php endif; ?>
<?php
$args = array(
'echo' => 1,
'depth' => 5,
'title_li' => '',
'walker' => new Walker_PageDescription()
);
wp_list_pages( apply_filters( 'graphene_default_menu_args', $args ) );
?>
</ul>
<?php
do_action( 'graphene_default_menu' );
}
endif;
class Walker_PageDescription extends Walker_Page {
/**
* Code exact copied from: wp-includes\post-template.pgp >> Walker_Page::start_el()
* @since 2.1.0
*/
function start_el( &$output, $page, $depth, $args, $current_page ) {
global $graphene_settings;
if ( $depth )
$indent = str_repeat("\t", $depth);
else
$indent = '';
extract( $args, EXTR_SKIP);
$css_class = array( 'page_item', 'page-item-'.$page->ID);
if ( !empty( $current_page) ) {
$_current_page = get_page( $current_page );
_get_post_ancestors( $_current_page);
if ( isset( $_current_page->ancestors) && in_array( $page->ID, (array) $_current_page->ancestors) ) {
$css_class[] = 'current_page_ancestor';
$css_class[] = 'current-menu-ancestor';
}
if ( $page->ID == $current_page ) {
$css_class[] = 'current_page_item';
$css_class[] = 'current-menu-item';
}
elseif ( $_current_page && $page->ID == $_current_page->post_parent ) {
$css_class[] = 'current_page_parent';
$css_class[] = 'current-menu-ancestor';
$css_class[] = 'current-menu-parent';
}
} elseif ( $page->ID == get_option( 'page_for_posts' ) ) {
$css_class[] = 'current_page_parent';
$css_class[] = 'current-menu-ancestor';
$css_class[] = 'current-menu-parent';
}
// Check if page has children
if ( get_pages( array( 'child_of' => $page->ID, 'parent' => $page->ID ) ) ) {
$css_class[] = 'menu-item-ancestor';
}
$css_class = implode( ' ', apply_filters( 'page_css_class', $css_class, $page) );
$title = apply_filters( 'the_title', $page->post_title, $page->ID );
// get the graphene description if it is set otherwise the wordpress default -> title
$menu_title = apply_filters( 'the_title', $page->post_title, $page->ID );
if ( ! $depth && ! $graphene_settings['disable_menu_desc'] ){
$menu_title = '<strong>' . $menu_title . '</strong>';
}
if ( ! $graphene_settings['disable_menu_desc'] ){
$menu_title .= ( get_post_meta( $page->ID, '_graphene_nav_description', true ) && ! $depth ) ?
'<span>' . get_post_meta( $page->ID, '_graphene_nav_description', true ) . '</span>' :
'';
}
$output .= $indent . '<li class="' . $css_class . '"><a href="' . get_permalink( $page->ID) . '">' . $link_before . $menu_title . $link_after . '</a>';
if ( !empty( $show_date) ) {
if ( 'modified' == $show_date )
$time = $page->post_modified;
else
$time = $page->post_date;
$output .= " " . mysql2date( $date_format, $time);
}
$output = apply_filters( 'graphene_page_description_walker_output', $output, $page, $depth, $args, $current_page );
}
}
/*
* Adds a menu-item-ancestor class to menu items with children for styling.
* Code taken from the Menu-item-ancestor plugin by Valentinas Bakaitis
*/
function graphene_add_ancestor_class( $classlist, $item){
global $wp_query, $wpdb;
//get the ID of the object, to which menu item points
$id = get_post_meta( $item->ID, '_menu_item_object_id', true);
//get first menu item that is a child of that object
$children = $wpdb->get_var( 'SELECT post_id FROM '.$wpdb->postmeta.' WHERE meta_key like "_menu_item_menu_item_parent" AND meta_value='.$item->ID.' LIMIT 1' );
//if there is at least one item, then $children variable will contain it's ID (which is of course more than 0)
if( $children > 0)
//in that case - add the CSS class
$classlist[] = 'menu-item-ancestor';
//return class list
return $classlist;
}
//add filter to nav_menu_css_class list
add_filter( 'nav_menu_css_class', 'graphene_add_ancestor_class', 2, 10);
function graphene_get_menu_class( $menu_class ){
global $graphene_settings;
// if the search box is located in the navigation bar restrict the width of the menu to 12 grid columns
if (($search_box_location = $graphene_settings['search_box_location']) && $search_box_location == 'nav_bar'){
$menu_class .= ' grid_12';
}
return $menu_class;
}
?>
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