mundschenk-at / php-typography

	 *

	 * @return \DOMText|null The first child of type \DOMText, the element itself if it is of type \DOMText or null.

	 */

	public static function get_first_textnode( \DOMNode $node = null, $recursive = false ) {

		return self::get_edge_textnode( function( \DOMNodeList $children, \DOMText &$first_textnode = null ) {

			$i = 0;

			while ( $i < $children->length && empty( $first_textnode ) ) {

				$first_textnode = self::get_first_textnode( $children->item( $i ), true );

				$i++;

			}

		}, $node, $recursive );

	}

	/**

	 * Retrieves the last \DOMText child of the element. Block-level child elements are ignored.

	 *

	 * @return \DOMText|null The last child of type \DOMText, the element itself if it is of type \DOMText or null.

	 */

	public static function get_last_textnode( \DOMNode $node = null, $recursive = false ) {

		return self::get_edge_textnode( function( \DOMNodeList $children, \DOMText &$last_textnode = null ) {

			$i = $children->length - 1;

			while ( $i >= 0 && empty( $last_textnode ) ) {

				$last_textnode = self::get_last_textnode( $children->item( $i ), true );

				$i--;

			}

		}, $node, $recursive );

	}

	/**

	 * Retrieves an edge \DOMText child of the element specified by the callable.