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Editing: wp_bootstrap_navwalker.php

<?php

/**

* Class Name: wp_bootstrap_navwalker

* GitHub URI:

* Description: A custom WordPress nav walker class to implement the Bootstrap 3 navigation style in a custom theme using the WordPress built in menu manager.

* Version: 2.0.4

* Author: Edward McIntyre - @twittem

* License: GPL-2.0+

* License URI:

class wp_bootstrap_navwalker extends Walker_Nav_Menu {

/**

* @see Walker::start_lvl()

* @since 3.0.0

* @param string $output Passed by reference. Used to append additional content.

* @param int $depth Depth of page. Used for padding.

public function start_lvl( &$output, $depth = 0, $args = array() ) {

$indent = str_repeat( "\t", $depth );

$output .= "\n$indent<ul role=\"menu\" class=\" dropdown-menu\">\n";

}

/**

* @see Walker::start_el()

* @since 3.0.0

* @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 int $current_page Menu item ID.

* @param object $args

public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {

$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

/**

* Dividers, Headers or Disabled

* =============================

* Determine whether the item is a Divider, Header, Disabled or regular

* menu item. To prevent errors we use the strcasecmp() function to so a

* comparison that is not case sensitive. The strcasecmp() function returns

* a 0 if the strings are equal.

if ( strcasecmp( $item->attr_title, 'divider' ) == 0 && $depth === 1 ) {

$output .= $indent . '<li role="presentation" class="divider">';

} else if ( strcasecmp( $item->title, 'divider') == 0 && $depth === 1 ) {

$output .= $indent . '<li role="presentation" class="divider">';

} else if ( strcasecmp( $item->attr_title, 'dropdown-header') == 0 && $depth === 1 ) {

$output .= $indent . '<li role="presentation" class="dropdown-header">' . esc_attr( $item->title );

} else if ( strcasecmp($item->attr_title, 'disabled' ) == 0 ) {

$output .= $indent . '<li role="presentation" class="disabled"><a href="#">' . esc_attr( $item->title ) . '</a>';

} else {

$class_names = $value = '';

$classes = empty( $item->classes ) ? array() : (array) $item->classes;

$classes[] = 'menu-item-' . $item->ID;

$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );

if ( $args->has_children )

$class_names .= ' dropdown';

if ( in_array( 'current-menu-item', $classes ) )

$class_names .= ' active';

$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );

$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';

$output .= $indent . '<li' . $id . $value . $class_names .'>';

$atts = array();
            
            $atts['title']  = ! empty( $item->title )   ? $item->title  : '';
            $atts['title']  = ! empty( $item->attr_title )   ? $item->attr_title  : $atts['title'];

$atts['target'] = ! empty( $item->target )  ? $item->target : '';

$atts['rel']    = ! empty( $item->xfn )     ? $item->xfn    : '';

// If item has_children add atts to a.

if ( $args->has_children && $depth === 0 ) {

$atts['href'] = ! empty( $item->url ) ? $item->url : '';

//$atts['data-toggle']   = 'dropdown';

$atts['class']           = 'dropdown-toggle';

} else {

$atts['href'] = ! empty( $item->url ) ? $item->url : '';

}

$atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args );

$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;

* Glyphicons

* ===========

* Since the the menu item is NOT a Divider or Header we check the see

* if there is a value in the attr_title property. If the attr_title

* property is NOT null we apply it as the class name for the glyphicon.

if ( ! empty( $item->attr_title ) )

$item_output .= '<a'. $attributes .'><span class="glyphicon ' . esc_attr( $item->attr_title ) . '"></span>&nbsp;';

else

$item_output .= '<a'. $attributes .'>';

$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;

$item_output .= ( $args->has_children && 0 === $depth ) ? ' <span class="caret"></span></a>' : '</a>';

$item_output .= $args->after;

$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );

}

/**

* Traverse elements to create list from elements.

* Display one element if the element doesn't have any children otherwise,

* display the element and its children. Will only traverse up to the max

* depth and no ignore elements under that depth.

* This method shouldn't be called directly, use the walk() method instead.

* @see Walker::start_el()

* @since 2.5.0

* @param object $element Data object

* @param array $children_elements List of elements to continue traversing.

* @param int $max_depth Max depth to traverse.

* @param int $depth Depth of current element.

* @param array $args

* @param string $output Passed by reference. Used to append additional content.

* @return null Null on failure with no changes to parameters.

public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) {

if ( ! $element )

return;

$id_field = $this->db_fields['id'];

// Display this element.

if ( is_object( $args[0] ) )

$args[0]->has_children = ! empty( $children_elements[ $element->$id_field ] );

parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );

}

/**

* Menu Fallback

* =============

* If this function is assigned to the wp_nav_menu's fallback_cb variable

* and a manu has not been assigned to the theme location in the WordPress

* menu manager the function with display nothing to a non-logged in user,

* and will add a link to the WordPress menu manager if logged in as an admin.

* @param array $args passed from the wp_nav_menu function.

public static function fallback( $args ) {

if ( current_user_can( 'manage_options' ) ) {

extract( $args );

$fb_output = null;

if ( $container ) {

$fb_output = '<' . $container;

if ( $container_id )

$fb_output .= ' id="' . $container_id . '"';

if ( $container_class )

$fb_output .= ' class="' . $container_class . '"';

$fb_output .= '>';

}

$fb_output .= '<ul';

if ( $menu_id )

$fb_output .= ' id="' . $menu_id . '"';

if ( $menu_class )

$fb_output .= ' class="' . $menu_class . '"';

$fb_output .= '>';

$fb_output .= '<li><a href="' . admin_url( 'nav-menus.php' ) . '">Add a menu</a></li>';

$fb_output .= '</ul>';

if ( $container )

$fb_output .= '</' . $container . '>';

echo $fb_output;

}

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