rational-walkers.php

/**
 * Create HTML list of pages.
 *
 * @since 1.0
 * @uses Walker_Page
 */
class Rational_Walker_Page extends Walker_Page {
	/**
	 * @see Walker_Page::start_lvl()
	 * @since 1.0
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param int $depth Depth of page. Used for padding.
	 * @param array $args
	 */
	public function start_lvl( &$output, $depth = 0, $args = array() ) {
		$indent = str_repeat("\t", $depth);
		$output .= "\n$indent<ul class='sub-menu'>\n";
	}

	/**
	 * @see Walker_Page::start_el()
	 * @since 1.0
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param object $page Page data object.
	 * @param int $depth Depth of page. Used for padding.
	 * @param int $current_page Page ID.
	 * @param array $args
	 */
	public function start_el( &$output, $page, $depth = 0, $args = array(), $current_page = 0 ) {
		if ( $depth ) {
			$indent = str_repeat( "\t", $depth );
		} else {
			$indent = '';
		}
		
		// Removed the page item and page id classes
		$css_class = array();

		if ( isset( $args['pages_with_children'][ $page->ID ] ) ) {
			// simpler, parent class
			$css_class[] = 'parent';
		}

		// simpler, ancestor classes
		if ( ! empty( $current_page ) ) {
			$_current_page = get_post( $current_page );
			if ( $_current_page && in_array( $page->ID, $_current_page->ancestors ) ) {
				$css_class[] = 'active-ancestor';
			}
			if ( $page->ID == $current_page ) {
				$css_class[] = 'active';
			} elseif ( $_current_page && $page->ID == $_current_page->post_parent ) {
				$css_class[] = 'active-parent';
			}
		} elseif ( $page->ID == get_option('page_for_posts') ) {
			$css_class[] = 'active-parent';
		}

		/**
		 * Filter the list of CSS classes to include with each page item in the list.
		 *
		 * @since 1.0
		 *
		 * @see wp_list_pages()
		 *
		 * @param array   $css_class    An array of CSS classes to be applied
		 *                             to each list item.
		 * @param WP_Post $page         Page data object.
		 * @param int     $depth        Depth of page, used for padding.
		 * @param array   $args         An array of arguments.
		 * @param int     $current_page ID of the current page.
		 */
		$css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page ) );

		if ( '' === $page->post_title ) {
			$page->post_title = sprintf( __( '#%d (no title)' ), $page->ID );
		}

		$args['link_before'] = empty( $args['link_before'] ) ? '' : $args['link_before'];
		$args['link_after'] = empty( $args['link_after'] ) ? '' : $args['link_after'];

		/** This filter is documented in wp-includes/post-template.php */
		// only add the class attribute if needed
		$output .= $indent . sprintf(
			'<li %s><a href="%s">%s%s%s</a>',
			!empty( $css_classes ) ? "class='{$css_classes}'" : '',
			get_permalink( $page->ID ),
			$args['link_before'],
			apply_filters( 'the_title', $page->post_title, $page->ID ),
			$args['link_after']
		);

		if ( ! empty( $args['show_date'] ) ) {
			if ( 'modified' == $args['show_date'] ) {
				$time = $page->post_modified;
			} else {
				$time = $page->post_date;
			}

			$date_format = empty( $args['date_format'] ) ? '' : $args['date_format'];
			$output .= " " . mysql2date( $date_format, $time );
		}
	}
} // Rational_Walker_Page

/**
 * Create HTML list of nav menu items.
 *
 * @since 1.0
 * @uses Walker_Nav_Menu
 */
class Rational_Walker_Nav_Menu extends Walker_Nav_Menu {
	/**
	 * Start the element output.
	 *
	 * @see Walker_Nav_Menu::start_el()
	 *
	 * @since 1.0
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param object $item   Menu item data object.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu()
	 * @param int    $id     Current item ID.
	 */
	public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
		$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

		$classes = empty( $item->classes ) ? array() : (array) $item->classes;
		$classes[] = 'menu-item-' . $item->ID;
		
		// Cleaner class array to replace default
		$new_classes = array();
		if ( in_array( 'menu-item-has-children', $classes ) )
			$new_classes[] = 'parent';
		if ( in_array( 'current-menu-item', $classes ) )
			$new_classes[] = 'active';
		if ( in_array( 'current-menu-ancestor', $classes ) )
			$new_classes[] = 'active-ancestor';
		if ( in_array( 'current-menu-parent', $classes ) )
			$new_classes[] = 'active-parent';
		$classes = $new_classes;

		/**
		 * Filter the CSS class(es) applied to a menu item's list item element.
		 *
		 * @since 1.0
		 *
		 * @param array  $classes The CSS classes that are applied to the menu item's `<li>` element.
		 * @param object $item    The current menu item.
		 * @param array  $args    An array of {@see wp_nav_menu()} arguments.
		 * @param int    $depth   Depth of menu item. Used for padding.
		 */
		$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) );
		$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

		// removed the ID
		$output .= $indent . '<li' . $class_names .'>';

		$atts = array();
		$atts['title']  = ! empty( $item->attr_title ) ? $item->attr_title : '';
		$atts['target'] = ! empty( $item->target )     ? $item->target     : '';
		$atts['rel']    = ! empty( $item->xfn )        ? $item->xfn        : '';
		$atts['href']   = ! empty( $item->url )        ? $item->url        : '';

		/**
		 * Filter the HTML attributes applied to a menu item's anchor element.
		 *
		 * @since 1.0
		 *
		 * @param array $atts {
		 *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
		 *
		 *     @type string $title  Title attribute.
		 *     @type string $target Target attribute.
		 *     @type string $rel    The rel attribute.
		 *     @type string $href   The href attribute.
		 * }
		 * @param object $item  The current menu item.
		 * @param array  $args  An array of {@see wp_nav_menu()} arguments.
		 * @param int    $depth Depth of menu item. Used for padding.
		 */
		$atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args, $depth );

		$attributes = '';
		foreach ( $atts as $attr => $value ) {
			if ( ! empty( $value ) ) {
				$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
				$attributes .= ' ' . $attr . '="' . $value . '"';
			}
		}

		$item_output = $args->before;
		$item_output .= '<a'. $attributes .'>';
		/** This filter is documented in wp-includes/post-template.php */
		$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
		$item_output .= '</a>';
		$item_output .= $args->after;

		/**
		 * Filter a menu item's starting output.
		 *
		 * The menu item's starting output only includes `$args->before`, the opening `<a>`,
		 * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
		 * no filter for modifying the opening and closing `<li>` for a menu item.
		 *
		 * @since 1.0
		 *
		 * @param string $item_output The menu item's starting HTML output.
		 * @param object $item        Menu item data object.
		 * @param int    $depth       Depth of menu item. Used for padding.
		 * @param array  $args        An array of {@see wp_nav_menu()} arguments.
		 */
		$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
	}
} // Rational_Walker_Nav_Menu