Form_Frontend_Output_Handler::get_shortcode_content( array $atts )

	public function get_shortcode_content( $atts ) {
		$atts = shortcode_atts( array(
			'id'            => '',
			'show'          => 'direct',
			'iframe_width'  => '100%',
			'iframe_height' => '100%',
		), $atts );

		$atts['id'] = absint( $atts['id'] );

		if ( empty( $atts['id'] ) ) {
			return __( 'Shortcode is missing a form ID!', 'torro-forms' );
		}

		$form = $this->form_manager->get( $atts['id'] );
		if ( ! $form ) {
			return __( 'Shortcode is using an invalid form ID!', 'torro-forms' );
		}

		if ( 'iframe' === $atts['show'] ) {
			$url = get_permalink( $form->id );
			if ( isset( $_GET['torro_submission_id'] ) ) {
				$url = add_query_arg( 'torro_submission_id', absint( $_GET['torro_submission_id'] ), $url );
			}

			return '<iframe src="' . $url . '" style="width:' . esc_attr( $atts['iframe_width'] ) . ';height:' . esc_attr( $atts['iframe_height'] ) . ';"></iframe>';
		}

		$submission = null;
		if ( isset( $_GET['torro_submission_id'] ) ) {
			$submission = $this->form_manager->get_child_manager( 'submissions' )->get( absint( $_GET['torro_submission_id'] ) );
			if ( $submission->form_id !== $form->id ) {
				$submission = null;
			}
		}

		ob_start();
		$this->render_form_content( $form, $submission );
		return ob_get_clean();
	}