new_gist_file.php

public function feed_settings_fields() {
		return array(
			array(
				'title'  => 'PDF Settings',
				'fields' => array(
					array(
						'label'   => 'Enable PDF Download',
						'type'    => 'checkbox',
						'name'    => 'enabled',
						'tooltip' => 'Check this if you want a download link to the PDF to be displayed.',
						'choices' => array(
							array(
								'label' => 'Enabled',
								'name'  => 'enabled',
							),
						),
					),
					array(
						'label' => 'Content',
						'type'  => 'pdf_content',
						'name'  => 'pdf_content',
					),
				),
			),
		);
	}

	public function settings_pdf_content() {
		ob_start();
		wp_editor( '', 'pdf_content_editor' );
		$pdf_editor = ob_get_clean();

		return $pdf_editor;
	}