item_spacing ) && 'discard' === $args->item_spacing ) {
$t = '';
$n = '';
} else {
$t = "\t";
$n = "\n";
}
$indent = str_repeat( $t, $depth );
// Default class to add to the file.
$classes = array( 'dropdown-menu' );
/**
* Filters the CSS class(es) applied to a menu list element.
*
* @since WP 4.8.0
*
* @param array $classes The CSS classes that are applied to the menu `
` element.
* @param stdClass $args An object of `wp_nav_menu()` arguments.
* @param int $depth Depth of menu item. Used for padding.
*/
$class_names = join( ' ', apply_filters( 'nav_menu_submenu_css_class', $classes, $args, $depth ) );
$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
/**
* The `.dropdown-menu` container needs to have a labelledby
* attribute which points to it's trigger link.
*
* Form a string for the labelledby attribute from the the latest
* link with an id that was added to the $output.
*/
$labelledby = '';
// find all links with an id in the output.
preg_match_all( '/(/im', $output, $matches );
// with pointer at end of array check if we got an ID match.
if ( end( $matches[2] ) ) {
// build a string to use as aria-labelledby.
$labelledby = 'aria-labelledby="' . end( $matches[2] ) . '"';
}
$output .= "{$n}{$indent}';
if ( $container ) {
$fallback_output .= '' . esc_attr( $container ) . '>';
}
// if $args has 'echo' key and it's true echo, otherwise return.
if ( array_key_exists( 'echo', $args ) && $args['echo'] ) {
echo $fallback_output; // WPCS: XSS OK.
} else {
return $fallback_output;
}
}
}
/**
* Find any custom linkmod or icon classes and store in their holder
* arrays then remove them from the main classes array.
*
* Supported linkmods: .disabled, .dropdown-header, .dropdown-divider, .sr-only
* Supported iconsets: Font Awesome 4/5, Glypicons
*
* NOTE: This accepts the linkmod and icon arrays by reference.
*
* @since 4.0.0
*
* @param array $classes an array of classes currently assigned to the item.
* @param array $linkmod_classes an array to hold linkmod classes.
* @param array $icon_classes an array to hold icon classes.
* @param integer $depth an integer holding current depth level.
*
* @return array $classes a maybe modified array of classnames.
*/
private function separate_linkmods_and_icons_from_classes( $classes, &$linkmod_classes, &$icon_classes, $depth ) {
// Loop through $classes array to find linkmod or icon classes.
foreach ( $classes as $key => $class ) {
// If any special classes are found, store the class in it's
// holder array and and unset the item from $classes.
if ( preg_match( '/^disabled|^sr-only/i', $class ) ) {
// Test for .disabled or .sr-only classes.
$linkmod_classes[] = $class;
unset( $classes[ $key ] );
} elseif ( preg_match( '/^dropdown-header|^dropdown-divider|^dropdown-item-text/i', $class ) && $depth > 0 ) {
// Test for .dropdown-header or .dropdown-divider and a
// depth greater than 0 - IE inside a dropdown.
$linkmod_classes[] = $class;
unset( $classes[ $key ] );
} elseif ( preg_match( '/^fa-(\S*)?|^fa(s|r|l|b)?(\s?)?$/i', $class ) ) {
// Font Awesome.
$icon_classes[] = $class;
unset( $classes[ $key ] );
} elseif ( preg_match( '/^glyphicon-(\S*)?|^glyphicon(\s?)$/i', $class ) ) {
// Glyphicons.
$icon_classes[] = $class;
unset( $classes[ $key ] );
}
}
return $classes;
}
/**
* Return a string containing a linkmod type and update $atts array
* accordingly depending on the decided.
*
* @since 4.0.0
*
* @param array $linkmod_classes array of any link modifier classes.
*
* @return string empty for default, a linkmod type string otherwise.
*/
private function get_linkmod_type( $linkmod_classes = array() ) {
$linkmod_type = '';
// Loop through array of linkmod classes to handle their $atts.
if ( ! empty( $linkmod_classes ) ) {
foreach ( $linkmod_classes as $link_class ) {
if ( ! empty( $link_class ) ) {
// check for special class types and set a flag for them.
if ( 'dropdown-header' === $link_class ) {
$linkmod_type = 'dropdown-header';
} elseif ( 'dropdown-divider' === $link_class ) {
$linkmod_type = 'dropdown-divider';
} elseif ( 'dropdown-item-text' === $link_class ) {
$linkmod_type = 'dropdown-item-text';
}
}
}
}
return $linkmod_type;
}
/**
* Update the attributes of a nav item depending on the limkmod classes.
*
* @since 4.0.0
*
* @param array $atts array of atts for the current link in nav item.
* @param array $linkmod_classes an array of classes that modify link or nav item behaviors or displays.
*
* @return array maybe updated array of attributes for item.
*/
private function update_atts_for_linkmod_type( $atts = array(), $linkmod_classes = array() ) {
if ( ! empty( $linkmod_classes ) ) {
foreach ( $linkmod_classes as $link_class ) {
if ( ! empty( $link_class ) ) {
// update $atts with a space and the extra classname...
// so long as it's not a sr-only class.
if ( 'sr-only' !== $link_class ) {
$atts['class'] .= ' ' . esc_attr( $link_class );
}
// check for special class types we need additional handling for.
if ( 'disabled' === $link_class ) {
// Convert link to '#' and unset open targets.
$atts['href'] = '#';
unset( $atts['target'] );
} elseif ( 'dropdown-header' === $link_class || 'dropdown-divider' === $link_class || 'dropdown-item-text' === $link_class ) {
// Store a type flag and unset href and target.
unset( $atts['href'] );
unset( $atts['target'] );
}
}
}
}
return $atts;
}
/**
* Wraps the passed text in a screen reader only class.
*
* @since 4.0.0
*
* @param string $text the string of text to be wrapped in a screen reader class.
* @return string the string wrapped in a span with the class.
*/
private function wrap_for_screen_reader( $text = '' ) {
if ( $text ) {
$text = '' . $text . '';
}
return $text;
}
/**
* Returns the correct opening element and attributes for a linkmod.
*
* @since 4.0.0
*
* @param string $linkmod_type a sting containing a linkmod type flag.
* @param string $attributes a string of attributes to add to the element.
*
* @return string a string with the openign tag for the element with attribibutes added.
*/
private function linkmod_element_open( $linkmod_type, $attributes = '' ) {
$output = '';
if ( 'dropdown-item-text' === $linkmod_type ) {
$output .= '';
} elseif ( 'dropdown-header' === $linkmod_type ) {
// For a header use a span with the .h6 class instead of a real
// header tag so that it doesn't confuse screen readers.
$output .= '