includes/classes/class-lsx-bootstrap-navwalker.php
<?php
/**
* LSX functions and definitions - Bootstrap Navigation Walker
*
* @package lsx
* @subpackage navigation
* @category bootstrap-navigation-walker
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
if ( ! class_exists( 'Walker_Nav_Menu' ) ) {
return;
}
if ( ! class_exists( 'LSX_Bootstrap_Navwalker' ) ) :
/**
* Cleaner Bootstrap walker
*
* @package lsx
* @subpackage navigation
* @category bootstrap-navigation-walker
*/
class LSX_Bootstrap_Navwalker extends Walker_Nav_Menu {
/**
* Used to append additional content.
*
* @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";
}
/**
* Used to append additional content.
* @param string $item Passed by reference.
*/
public function filter_default_pages( &$item ) {
return $item;
}
/**
* @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 ) : '';
/**
* If this is a default menu being called we need to fix
* the item object thats coming through.
*/
if ( ! isset( $item->title ) ) {
return;
}
/**
* 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 ( 0 == strcasecmp( $item->attr_title, 'divider' ) && 1 === $depth ) {
$output .= $indent . '<li role="presentation" class="divider">';
} elseif ( 0 == strcasecmp( $item->title, 'divider' ) && 1 === $depth ) {
$output .= $indent . '<li role="presentation" class="divider">';
} elseif ( 0 == strcasecmp( $item->attr_title, 'dropdown-header' ) && 1 === $depth ) {
$output .= $indent . '<li role="presentation" class="dropdown-header">' . esc_attr( $item->title );
} elseif ( 0 == strcasecmp( $item->attr_title, 'disabled' ) ) {
$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;
$classes = apply_filters( 'lsx_nav_menu_css_class', array_filter( $classes ), $item, $args, $depth );
$class_names = join( ' ', $classes );
if ( $args->has_children )
$class_names .= ' dropdown';
if ( in_array( 'current-menu-item', $classes ) )
$class_names .= ' active';
if ( in_array( 'current-menu-parent', $classes ) )
$class_names .= ' active';
//Check if this is ment to be a "social" type menu
$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->attr_title ) ? $item->attr_title : $item->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 ) {
$atts['href'] = ! empty( $item->url ) ? $item->url : '';
$atts['data-toggle'] = 'dropdown';
$atts['class'] = 'dropdown-toggle';
$atts['aria-haspopup'] = 'true';
} 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;
$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'];
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' ) ) {
$fb_output = null;
if ( $args['container'] ) {
$fb_output = '<' . $args['container'];
if ( $args['container_id'] ) {
$fb_output .= ' id="' . $args['container_id'] . '"';
}
if ( $args['container_class'] ) {
$fb_output .= ' class="' . $args['container_class'] . '"';
}
$fb_output .= '>';
}
$fb_output .= '<ul';
if ( $args['menu_id'] ) {
$fb_output .= ' id="' . $args['menu_id'] . '"';
}
if ( $args['menu_class'] ) {
$fb_output .= ' class="' . $args['menu_class'] . '"';
}
$fb_output .= '>';
$fb_output .= '<li><a href="' . esc_url( admin_url( 'nav-menus.php' ) ) . '">' . esc_html__( 'Add a menu', 'lsx' ) . '</a></li>';
$fb_output .= '</ul>';
if ( $args['container'] ) {
$fb_output .= '</' . $args['container'] . '>';
}
echo wp_kses_post( $fb_output );
}
}
}
endif;