Walker::display_element()

最后更新于：2021-11-26 05:16:20

Walker::display_element( object$element, array$children_elements, int$max_depth, int$depth, array$args, string$output)

Traverse elements to create list from elements.

参数

$element

(object) (Required) Data object.

$children_elements

(array) (Required) List of elements to continue traversing (passed by reference).

$max_depth

(int) (Required) Max depth to traverse.

$depth

(int) (Required) Depth of current element.

$args

(array) (Required) An array of arguments.

$output

(string) (Required) Used to append additional content (passed by reference).

源文件

文件: gc-includes/class-gc-walker.php 

	public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) {
		if ( ! $element ) {
			return;
		}

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

		// Display this element.
		$this->has_children = ! empty( $children_elements[ $id ] );
		if ( isset( $args[0] ) && is_array( $args[0] ) ) {
			$args[0]['has_children'] = $this->has_children; // Back-compat.
		}

		$this->start_el( $output, $element, $depth, ...array_values( $args ) );

		// Descend only when the depth is right and there are children for this element.
		if ( ( 0 == $max_depth || $max_depth > $depth + 1 ) && isset( $children_elements[ $id ] ) ) {

			foreach ( $children_elements[ $id ] as $child ) {

				if ( ! isset( $newlevel ) ) {
					$newlevel = true;
					// Start the child delimiter.
					$this->start_lvl( $output, $depth, ...array_values( $args ) );
				}
				$this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );
			}
			unset( $children_elements[ $id ] );
		}

		if ( isset( $newlevel ) && $newlevel ) {
			// End the child delimiter.
			$this->end_lvl( $output, $depth, ...array_values( $args ) );
		}

		// End this element.
		$this->end_el( $output, $element, $depth, ...array_values( $args ) );
	}