WP Short Code to Google Maps JS API Embed

mapa-shortcode.php

<?php

if ( ! class_exists( 'Mapa_Shortcode' ) ) :
/**
 * Shortcode [mapa]
 *
 * Pega atributos através do place="lat,lng"
 *
 * Ex.: [mapa place="-26.2458151,-49.3858951"]
 * Mostra o script e: <div id="map" class="map"></div>
 *
 * @author Xthor
 * @link   https://gist.github.com/camaleaun/ea4e3325a7236914cae3d149bbcb05c3
 */
class Mapa_Shortcode {
	static $adicionar_script;

	static function init() {
		add_shortcode( 'mapa', array( __CLASS__, 'trata_shortcode' ) );

		add_action( 'init',      array( __CLASS__, 'registra_script' ) );
		add_action( 'wp_footer', array( __CLASS__, 'insere_script' ) );
	}

	static function trata_shortcode( $atts ) {
		self::$adicionar_script = true;

		extract(shortcode_atts(array(
			'place'  => '',
			'width'  => '100%',
			'height' => '400'
		), $atts));

		$style = "style=\"width:{$width};height:{$height}px;\"";
		ob_start();
		?>
		<div id="map" class="map"<?php echo $style; ?>>;
			<input type="hidden" id="place" value="<?php echo $place; ?>">
		</div>
		<?php
		return ob_get_clean();
	}

	static function registra_script() {
		wp_register_script( 'gmaps-api', "//maps.googleapis.com/maps/api/js", array(), '3.0', true );
		wp_register_script( 'mapa', plugins_url('assets/js/mapa.js', XT_PLUGIN_FILE), array(), '1.9.2', true );
	}

	static function insere_script() {
		if ( ! self::$adicionar_script )
			return;

		wp_print_scripts( 'gmaps-api' );
		wp_print_scripts( 'mapa' );
	}
}

Mapa_Shortcode::init();

endif;