363 lines
13 KiB
PHP
363 lines
13 KiB
PHP
<?php
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/**
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* Navigation Menu template functions
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*
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* @package WordPress
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* @subpackage Nav_Menus
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* @since 3.0.0
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*/
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/**
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* Create HTML list of nav menu items.
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*
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* @package WordPress
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* @since 3.0.0
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* @uses Walker
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*/
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class Walker_Nav_Menu extends Walker {
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/**
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* @see Walker::$tree_type
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* @since 3.0.0
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* @var string
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*/
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var $tree_type = array( 'post_type', 'taxonomy', 'custom' );
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/**
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* @see Walker::$db_fields
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* @since 3.0.0
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* @todo Decouple this.
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* @var array
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*/
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var $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' );
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/**
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* @see Walker::start_lvl()
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* @since 3.0.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param int $depth Depth of page. Used for padding.
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*/
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function start_lvl(&$output, $depth) {
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$indent = str_repeat("\t", $depth);
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$output .= "\n$indent<ul class=\"sub-menu\">\n";
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}
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/**
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* @see Walker::end_lvl()
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* @since 3.0.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param int $depth Depth of page. Used for padding.
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*/
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function end_lvl(&$output, $depth) {
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$indent = str_repeat("\t", $depth);
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$output .= "$indent</ul>\n";
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}
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/**
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* @see Walker::start_el()
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* @since 3.0.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param object $item Menu item data object.
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* @param int $depth Depth of menu item. Used for padding.
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* @param int $current_page Menu item ID.
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* @param object $args
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*/
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function start_el(&$output, $item, $depth, $args) {
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global $wp_query;
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$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
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$classes = $value = '';
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$classes = array( 'menu-item', 'menu-item-type-' . $item->type );
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if ( !empty($item->classes) )
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$classes = array_merge( $classes, $item->classes );
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if ( 'custom' != $item->type ) {
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$classes[] = 'menu-item-object-' . $item->object;
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$classes[] = 'menu-item-object-' . $item->type . '-' . $item->object_id;
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if ( 'post_type' == $item->type && 'page' == $item->object ) {
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// Back compat classes for pages to match wp_page_menu()
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$classes[] = 'page_item';
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$classes[] = 'page-item-' . $item->object_id;
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if ( ! empty( $item->classes ) ) {
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if ( in_array('current-menu-item', $classes) )
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$classes[] = 'current_page_item';
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if ( in_array('current-menu-parent', $classes) )
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$classes[] = 'current_page_parent';
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if ( in_array('current-menu-ancestor', $classes) )
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$classes[] = 'current_page_ancestor';
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}
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}
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} elseif ( 'custom' == $item->type && in_array('current-menu-item', $classes) && in_array('menu-item-home', $classes) ) {
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// Back compat for home limk to match wp_page_menu()
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$classes[] = 'current_page_item';
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}
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$classes = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
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$classes = ' class="' . esc_attr( $classes ) . '"';
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$output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $classes .'>';
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$attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : '';
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$attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : '';
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$attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : '';
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$attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : '';
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$item_output = $args->before;
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$item_output .= '<a'. $attributes .'>';
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$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
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$item_output .= '</a>';
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$item_output .= $args->after;
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$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
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}
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/**
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* @see Walker::end_el()
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* @since 3.0.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param object $item Page data object. Not used.
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* @param int $depth Depth of page. Not Used.
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*/
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function end_el(&$output, $item, $depth) {
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$output .= "</li>\n";
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}
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}
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/**
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* Displays a navigation menu.
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*
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* Optional $args contents:
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*
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* menu - The menu that is desired. Accepts (matching in order) id, slug, name. Defaults to blank.
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* menu_class - CSS class to use for the ul container of the menu list. Defaults to 'menu'.
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* container - Whether to wrap the ul, and what to wrap it with. Defaults to 'div'.
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* container_class - the class that is applied to the container. Defaults to blank.
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* container_id - The ID that is applied to the container. Defaults to the menu slug, incremented.
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* fallback_cb - If the menu doesn't exists, a callback function will fire. Defaults to 'wp_page_menu'.
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* before - Text before the link text.
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* after - Text after the link text.
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* link_before - Text before the link.
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* link_after - Text after the link.
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* echo - Whether to echo the menu or return it. Defaults to echo.
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* depth - how many levels of the hierarchy are to be included. 0 means all. Defaults to 0.
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* walker - allows a custom walker to be specified.
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* theme_location - the location in the theme to be used. Must be registered with register_nav_menu() in order to be selectable by the user.
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*
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* @since 3.0.0
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*
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* @param array $args Arguments
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*/
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function wp_nav_menu( $args = array() ) {
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global $_wp_nav_menu_slugs;
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$defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu',
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'echo' => true, 'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '',
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'depth' => 0, 'walker' => '', 'theme_location' => '' );
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$args = wp_parse_args( $args, $defaults );
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$args = apply_filters( 'wp_nav_menu_args', $args );
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$args = (object) $args;
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// Get the nav menu based on the requested menu
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$menu = wp_get_nav_menu_object( $args->menu );
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// Get the nav menu based on the theme_location
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if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_locations() ) && isset( $locations[ $args->theme_location ] ) )
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$menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] );
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// get the first menu that has items if we still can't find a menu
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if ( ! $menu && !$args->theme_location ) {
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$menus = wp_get_nav_menus();
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foreach ( $menus as $menu_maybe ) {
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if ( $menu_items = wp_get_nav_menu_items($menu_maybe->term_id) ) {
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$menu = $menu_maybe;
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break;
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}
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}
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}
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// If the menu exists, get its items.
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if ( $menu && ! is_wp_error($menu) && !isset($menu_items) )
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$menu_items = wp_get_nav_menu_items( $menu->term_id );
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// If no menu was found or if the menu has no items, call the fallback_cb if it exists
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if ( ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) ) )
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&& ( function_exists($args->fallback_cb) || is_callable( $args->fallback_cb ) ) )
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return call_user_func( $args->fallback_cb, (array) $args );
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// If no fallback function was specified and the menu doesn't exists, bail.
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if ( !$menu || is_wp_error($menu) )
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return false;
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$nav_menu = '';
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$items = '';
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$container_allowedtags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );
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if ( in_array( $args->container, $container_allowedtags ) ) {
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$class = $args->container_class ? ' class="' . esc_attr($args->container_class) . '"' : ' class="menu-'. $menu->slug .'-container"';
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$nav_menu .= '<'. $args->container . $class .'>';
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}
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// Set up the $menu_item variables
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_wp_menu_item_classes_by_context( $menu_items );
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$sorted_menu_items = array();
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foreach ( (array) $menu_items as $key => $menu_item )
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$sorted_menu_items[$menu_item->menu_order] = $menu_item;
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unset($menu_items);
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$items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );
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unset($sorted_menu_items);
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// Attributes
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$slug = 'menu-' . $menu->slug;
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if ( ! is_array( $_wp_nav_menu_slugs ) )
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$_wp_nav_menu_slugs = array();
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while ( in_array( $slug, $_wp_nav_menu_slugs ) ) {
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if ( preg_match( '#-(\d+)$#', $slug, $matches ) )
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$slug = preg_replace('#-(\d+)$#', '-' . ++$matches[1], $slug);
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else
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$slug = $slug . '-1';
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}
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$_wp_nav_menu_slugs[] = $slug;
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$attributes = ' id="' . ( empty( $args->container_id ) ? $slug : $args->container_id ) . '"';
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$attributes .= $args->menu_class ? ' class="'. $args->menu_class .'"' : '';
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$nav_menu .= '<ul'. $attributes .'>';
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// Allow plugins to hook into the menu to add their own <li>'s
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$items = apply_filters( 'wp_nav_menu_items', $items, $args );
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$items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );
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$nav_menu .= $items;
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unset($items);
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$nav_menu .= '</ul>';
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if ( in_array( $args->container, $container_allowedtags ) )
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$nav_menu .= '</'. $args->container .'>';
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$nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );
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if ( $args->echo )
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echo $nav_menu;
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else
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return $nav_menu;
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}
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/**
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* Add the class property classes for the current context, if applicable.
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*
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* @access private
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* @since 3.0
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*
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* @param array $menu_items The current menu item objects to which to add the class property information.
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*/
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function _wp_menu_item_classes_by_context( &$menu_items ) {
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global $wp_query;
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$queried_object = $wp_query->get_queried_object();
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$queried_object_id = (int) $wp_query->queried_object_id;
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$active_object = '';
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$active_parent_item_ids = array();
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$active_parent_object_ids = array();
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$possible_object_parents = array();
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$home_page_id = (int) get_option( 'page_for_posts' );
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if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) {
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foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) {
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if ( is_taxonomy_hierarchical( $taxonomy ) ) {
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$terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) );
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if ( is_array( $terms ) )
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$possible_object_parents = array_merge( $possible_object_parents, $terms );
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}
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}
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} elseif ( ! empty( $queried_object->post_type ) && is_post_type_hierarchical( $queried_object->post_type ) ) {
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_get_post_ancestors( $queried_object );
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}
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$possible_object_parents = array_filter( $possible_object_parents );
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foreach ( (array) $menu_items as $key => $menu_item ) {
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// if the menu item corresponds to a taxonomy term for the currently-queried non-hierarchical post object
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if ( $wp_query->is_singular && 'taxonomy' == $menu_item->type && in_array( $menu_item->object_id, $possible_object_parents ) ) {
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$active_parent_object_ids[] = (int) $menu_item->object_id;
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$active_parent_item_ids[] = (int) $menu_item->db_id;
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$active_object = $queried_object->post_type;
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// if the menu item corresponds to the currently-queried post or taxonomy object
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} elseif (
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$menu_item->object_id == $queried_object_id &&
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(
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( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id ) ||
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( 'post_type' == $menu_item->type && $wp_query->is_singular ) ||
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( 'taxonomy' == $menu_item->type && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax ) )
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)
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) {
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$menu_items[$key]->classes[] = 'current-menu-item';
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$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
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$active_parent_object_ids[] = (int) $menu_item->post_parent;
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$active_object = $menu_item->object;
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// if the menu item corresponds to the currently-requested URL
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} elseif ( 'custom' == $menu_item->object ) {
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$current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
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$item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url;
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if ( $item_url == $current_url ) {
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$menu_items[$key]->classes[] = 'current-menu-item';
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if ( untrailingslashit($current_url) == home_url() )
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$menu_items[$key]->classes[] = 'menu-item-home';
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$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
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$active_parent_object_ids[] = (int) $menu_item->post_parent;
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$active_object = $menu_item->object;
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}
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}
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// back-compat with wp_page_menu: add "current_page_parent" to static home page link for any non-page query
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if ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id )
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$menu_items[$key]->classes[] = 'current_page_parent';
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}
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$active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) );
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$active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) );
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// set parent's class
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foreach ( (array) $menu_items as $key => $parent_item ) {
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if (
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isset( $parent_item->type ) &&
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'post_type' == $parent_item->type &&
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! empty( $queried_object->post_type ) &&
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is_post_type_hierarchical( $queried_object->post_type ) &&
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in_array( $parent_item->object_id, $queried_object->ancestors )
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)
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$menu_items[$key]->classes[] = 'current-' . $queried_object->post_type . '-ancestor current-menu-ancestor';
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if ( in_array( $parent_item->db_id, $active_parent_item_ids ) )
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$menu_items[$key]->classes[] = 'current-menu-parent';
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if ( in_array( $parent_item->object_id, $active_parent_object_ids ) )
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$menu_items[$key]->classes[] = 'current-' . $active_object . '-parent';
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}
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}
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/**
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* Retrieve the HTML list content for nav menu items.
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*
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* @uses Walker_Nav_Menu to create HTML list content.
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* @since 2.1.0
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* @see Walker::walk() for parameters and return description.
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*/
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function walk_nav_menu_tree( $items, $depth, $r ) {
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$walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker;
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$args = array( $items, $depth, $r );
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return call_user_func_array( array(&$walker, 'walk'), $args );
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}
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?>
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