来自什么I thought was a duplicate, 我们得到了一个类来呈现导航菜单页面中的元框。
然后我用了这个core function 呈现元框内容。
它工作正常，但它显示了一些通知，可能需要进行良好的清理。现在要解析的代码太多了，我将把它作为起点放在这里。我所做的修改涉及VAR$post_type_name 和$post_types_list. 行中有一条注释不起作用，并在View All 选项卡。
add_action( \'admin_init\', array( \'call_someClass\', \'init\' ) );
/**
* The Class
*/
class call_someClass {
const LANG = \'exch_lang\';
public static function init() {
$class = __CLASS__;
new $class;
}
public function __construct() {
global $pagenow;
// Abort if not on the nav-menus.php admin UI page - avoid adding elsewhere
if ( \'nav-menus.php\' !== $pagenow )
return;
$this->add_some_meta_box();
}
/**
* Adds the meta box container
*/
public function add_some_meta_box(){
add_meta_box(
\'info_meta_box_\'
,__( \'Example metabox\', self::LANG )
,array( $this, \'render_meta_box_content\' )
,\'nav-menus\' // important !!!
,\'side\' // important, only side seems to work!!!
,\'high\'
);
}
/**
* Render Meta Box content
*/
public function render_meta_box_content() {
global $_nav_menu_placeholder, $nav_menu_selected_id;
$post_type_name = \'all-cpts\';
$post_types_list = array_keys(get_post_types( array( \'show_in_nav_menus\' => true ), \'array\' ));
// paginate browsing for large numbers of post objects
$per_page = 50;
$pagenum = isset( $_REQUEST[$post_type_name . \'-tab\'] ) && isset( $_REQUEST[\'paged\'] ) ? absint( $_REQUEST[\'paged\'] ) : 1;
$offset = 0 < $pagenum ? $per_page * ( $pagenum - 1 ) : 0;
$args = array(
\'offset\' => $offset,
\'order\' => \'ASC\',
\'orderby\' => \'title\',
\'posts_per_page\' => $per_page,
\'post_type\' => $post_types_list,
\'suppress_filters\' => true,
\'update_post_term_cache\' => false,
\'update_post_meta_cache\' => false
);
if ( isset( $post_type[\'args\']->_default_query ) )
$args = array_merge($args, (array) $post_type[\'args\']->_default_query );
// @todo transient caching of these results with proper invalidation on updating of a post of this type
$get_posts = new WP_Query;
$posts = $get_posts->query( $args );
if ( ! $get_posts->post_count ) {
echo \'<p>\' . __( \'No items.\' ) . \'</p>\';
return;
}
$post_type_object = get_post_type_object($post_type_name);
$num_pages = $get_posts->max_num_pages;
$page_links = paginate_links( array(
\'base\' => add_query_arg(
array(
$post_type_name . \'-tab\' => \'all\',
\'paged\' => \'%#%\',
\'item-type\' => \'post_type\',
\'item-object\' => $post_type_name,
)
),
\'format\' => \'\',
\'prev_text\' => __(\'«\'),
\'next_text\' => __(\'»\'),
\'total\' => $num_pages,
\'current\' => $pagenum
));
if ( !$posts )
$error = \'<li id="error">\'. $post_type[\'args\']->labels->not_found .\'</li>\';
$db_fields = false;
if ( is_post_type_hierarchical( $post_type_name ) ) {
$db_fields = array( \'parent\' => \'post_parent\', \'id\' => \'ID\' );
}
$walker = new Walker_Nav_Menu_Checklist( $db_fields );
$current_tab = \'most-recent\';
if ( isset( $_REQUEST[$post_type_name . \'-tab\'] ) && in_array( $_REQUEST[$post_type_name . \'-tab\'], array(\'all\', \'search\') ) ) {
$current_tab = $_REQUEST[$post_type_name . \'-tab\'];
}
if ( ! empty( $_REQUEST[\'quick-search-posttype-\' . $post_type_name] ) ) {
$current_tab = \'search\';
}
$removed_args = array(
\'action\',
\'customlink-tab\',
\'edit-menu-item\',
\'menu-item\',
\'page-tab\',
\'_wpnonce\',
);
?>
<div id="posttype-<?php echo $post_type_name; ?>" class="posttypediv">
<ul id="posttype-<?php echo $post_type_name; ?>-tabs" class="posttype-tabs add-menu-item-tabs">
<li <?php echo ( \'most-recent\' == $current_tab ? \' class="tabs"\' : \'\' ); ?>><a class="nav-tab-link" href="<?php if ( $nav_menu_selected_id ) echo esc_url(add_query_arg($post_type_name . \'-tab\', \'most-recent\', remove_query_arg($removed_args))); ?>#tabs-panel-posttype-<?php echo $post_type_name; ?>-most-recent"><?php _e(\'Most Recent\'); ?></a></li>
<li <?php echo ( \'all\' == $current_tab ? \' class="tabs"\' : \'\' ); ?>><a class="nav-tab-link" href="<?php if ( $nav_menu_selected_id ) echo esc_url(add_query_arg($post_type_name . \'-tab\', \'all\', remove_query_arg($removed_args))); ?>#<?php echo $post_type_name; ?>-all"><?php _e(\'View All\'); ?></a></li>
<li <?php echo ( \'search\' == $current_tab ? \' class="tabs"\' : \'\' ); ?>><a class="nav-tab-link" href="<?php if ( $nav_menu_selected_id ) echo esc_url(add_query_arg($post_type_name . \'-tab\', \'search\', remove_query_arg($removed_args))); ?>#tabs-panel-posttype-<?php echo $post_type_name; ?>-search"><?php _e(\'Search\'); ?></a></li>
</ul>
<div id="tabs-panel-posttype-<?php echo $post_type_name; ?>-most-recent" class="tabs-panel <?php
echo ( \'most-recent\' == $current_tab ? \'tabs-panel-active\' : \'tabs-panel-inactive\' );
?>">
<ul id="<?php echo $post_type_name; ?>checklist-most-recent" class="categorychecklist form-no-clear">
<?php
$recent_args = array_merge( $args, array( \'orderby\' => \'post_date\', \'order\' => \'DESC\', \'posts_per_page\' => 15 ) );
$most_recent = $get_posts->query( $recent_args );
$args[\'walker\'] = $walker;
echo walk_nav_menu_tree( array_map(\'wp_setup_nav_menu_item\', $most_recent), 0, (object) $args );
?>
</ul>
</div><!-- /.tabs-panel -->
<div class="tabs-panel <?php
echo ( \'search\' == $current_tab ? \'tabs-panel-active\' : \'tabs-panel-inactive\' );
?>" id="tabs-panel-posttype-<?php echo $post_type_name; ?>-search">
<?php
if ( isset( $_REQUEST[\'quick-search-posttype-\' . $post_type_name] ) ) {
$searched = esc_attr( $_REQUEST[\'quick-search-posttype-\' . $post_type_name] );
$search_results = get_posts( array( \'s\' => $searched, \'post_type\' => $post_types_list, \'fields\' => \'all\', \'order\' => \'DESC\', ) );
} else {
$searched = \'\';
$search_results = array();
}
?>
<p class="quick-search-wrap">
<input type="search" class="quick-search input-with-default-title" title="<?php esc_attr_e(\'Search\'); ?>" value="<?php echo $searched; ?>" name="quick-search-posttype-<?php echo $post_type_name; ?>" />
<span class="spinner"></span>
<?php submit_button( __( \'Search\' ), \'button-small quick-search-submit button-secondary hide-if-js\', \'submit\', false, array( \'id\' => \'submit-quick-search-posttype-\' . $post_type_name ) ); ?>
</p>
<ul id="<?php echo $post_type_name; ?>-search-checklist" data-wp-lists="list:<?php echo $post_type_name?>" class="categorychecklist form-no-clear">
<?php if ( ! empty( $search_results ) && ! is_wp_error( $search_results ) ) : ?>
<?php
$args[\'walker\'] = $walker;
echo walk_nav_menu_tree( array_map(\'wp_setup_nav_menu_item\', $search_results), 0, (object) $args );
?>
<?php elseif ( is_wp_error( $search_results ) ) : ?>
<li><?php echo $search_results->get_error_message(); ?></li>
<?php elseif ( ! empty( $searched ) ) : ?>
<li><?php _e(\'No results found.\'); ?></li>
<?php endif; ?>
</ul>
</div><!-- /.tabs-panel -->
<div id="<?php echo $post_type_name; ?>-all" class="tabs-panel tabs-panel-view-all <?php
echo ( \'all\' == $current_tab ? \'tabs-panel-active\' : \'tabs-panel-inactive\' );
?>">
<?php if ( ! empty( $page_links ) ) : ?>
<div class="add-menu-item-pagelinks">
<?php echo $page_links; ?>
</div>
<?php endif; ?>
<ul id="<?php echo $post_type_name; ?>checklist" data-wp-lists="list:<?php echo $post_type_name?>" class="categorychecklist form-no-clear">
<?php
$args[\'walker\'] = $walker;
// if we\'re dealing with pages, let\'s put a checkbox for the front page at the top of the list
if ( \'page\' == $post_type_name ) {
$front_page = \'page\' == get_option(\'show_on_front\') ? (int) get_option( \'page_on_front\' ) : 0;
if ( ! empty( $front_page ) ) {
$front_page_obj = get_post( $front_page );
$front_page_obj->front_or_home = true;
array_unshift( $posts, $front_page_obj );
} else {
$_nav_menu_placeholder = ( 0 > $_nav_menu_placeholder ) ? intval($_nav_menu_placeholder) - 1 : -1;
array_unshift( $posts, (object) array(
\'front_or_home\' => true,
\'ID\' => 0,
\'object_id\' => $_nav_menu_placeholder,
\'post_content\' => \'\',
\'post_excerpt\' => \'\',
\'post_parent\' => \'\',
\'post_title\' => _x(\'Home\', \'nav menu home label\'),
\'post_type\' => \'nav_menu_item\',
\'type\' => \'custom\',
\'url\' => home_url(\'/\'),
) );
}
}
// THIS HAS TO BE FIXED <----------
$posts = apply_filters( \'nav_menu_items_\'.$post_type_name, $posts, $args, $post_type );
$checkbox_items = walk_nav_menu_tree( array_map(\'wp_setup_nav_menu_item\', $posts), 0, (object) $args );
if ( \'all\' == $current_tab && ! empty( $_REQUEST[\'selectall\'] ) ) {
$checkbox_items = preg_replace(\'/(type=(.)checkbox(\\2))/\', \'$1 checked=$2checked$2\', $checkbox_items);
}
echo $checkbox_items;
?>
</ul>
<?php if ( ! empty( $page_links ) ) : ?>
<div class="add-menu-item-pagelinks">
<?php echo $page_links; ?>
</div>
<?php endif; ?>
</div><!-- /.tabs-panel -->
<p class="button-controls">
<span class="list-controls">
<a href="<?php
echo esc_url(add_query_arg(
array(
$post_type_name . \'-tab\' => \'all\',
\'selectall\' => 1,
),
remove_query_arg($removed_args)
));
?>#posttype-<?php echo $post_type_name; ?>" class="select-all"><?php _e(\'Select All\'); ?></a>
</span>
<span class="add-to-menu">
<input type="submit"<?php disabled( $nav_menu_selected_id, 0 ); ?> class="button-secondary submit-add-to-menu right" value="<?php esc_attr_e(\'Add to Menu\'); ?>" name="add-post-type-menu-item" id="submit-posttype-<?php echo $post_type_name; ?>" />
<span class="spinner"></span>
</span>
</p>
</div><!-- /.posttypediv -->
<?php
}
}
