* Dependencies API: WP_Scripts class

 * @since 2.6.0

 * @package WordPress

 * @subpackage Dependencies

 * Core class used to register scripts.

 * @since 2.1.0

 *

 * @see WP_Dependencies

	/**

	 * Base URL for scripts.

	 *

	 * Full URL with trailing slash.

	 *

	 * @since 2.6.0

	 * @var string

	 */

	public $base_url;

	/**

	 * URL of the content directory.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Default version string for stylesheets.

	 *

	 * @since 2.6.0

	 * @var string

	 */

	/**

	 * Holds handles of scripts which are enqueued in footer.

	 *

	 * @since 2.8.0

	 * @var array

	 */

	/**

	 * Holds a list of script handles which will be concatenated.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Holds a string which contains script handles and their version.

	 *

	 * @since 2.8.0

	 * @deprecated 3.4.0

	 * @var string

	 */

	/**

	 * Whether to perform concatenation.

	 *

	 * @since 2.8.0

	 * @var bool

	 */

	/**

	 * Holds HTML markup of scripts and additional data if concatenation

	 * is enabled.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Holds inline code if concatenation is enabled.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Holds a list of script handles which are not in the default directory

	 * if concatenation is enabled.

	 *

	 * Unused in core.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Holds a string which contains handles and versions of scripts which

	 * are not in the default directory if concatenation is enabled.

	 *

	 * Unused in core.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * List of default directories.

	 *

	 * @since 2.8.0

	 * @var array

	 */

	/**

	 * Constructor.

	 *

	 * @since 2.6.0

	 */

	/**

	 * Initialize the class.

	 *

	 * @since 3.4.0

	 */

		 * @param WP_Scripts $this WP_Scripts instance (passed by reference).

	 * @since 2.1.0

	 * @since 2.8.0 Added the `$group` parameter.

	 *

	/**

	 * Prints extra scripts of a registered script.

	 *

	 * @since 2.1.0

	 * @since 2.8.0 Added the `$echo` parameter.

	 * @deprecated 3.3.0

	 *

	 * @see print_extra_script()

	 *

	 * @param string $handle The script's registered handle.

	 * @param bool   $echo   Optional. Whether to echo the extra script instead of just returning it.

	 *                       Default true.

	 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true, true otherwise.

	 */

		_deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' );

	/**

	 * Prints extra scripts of a registered script.

	 *

	 * @since 3.3.0

	 *

	 * @param string $handle The script's registered handle.

	 * @param bool   $echo   Optional. Whether to echo the extra script instead of just returning it.

	 *                       Default true.

	 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true, true otherwise.

	 */

	/**

	 * Processes a script dependency.

	 *

	 * @since 2.6.0

	 * @since 2.8.0 Added the `$group` parameter.

	 *

	 * @see WP_Dependencies::do_item()

	 *

	 * @param string $handle    The script's registered handle.

	 * @param int|false $group  Optional. Group level: (int) level, (false) no groups. Default false.

	 * @return bool True on success, false on failure.

	 */

		$before_handle = $this->print_inline_script( $handle, 'before', false );

		$after_handle = $this->print_inline_script( $handle, 'after', false );

		if ( $before_handle ) {

			$before_handle = sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $before_handle );

		}

		if ( $after_handle ) {

			$after_handle = sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $after_handle );

		}

			 * Filters the script loader source.

			if ( $this->in_default_dir( $srce ) && ( $before_handle || $after_handle ) ) {

				$this->do_concat = false;

				// Have to print the so-far concatenated scripts right away to maintain the right order.

				_print_scripts();

				$this->reset();

			} elseif ( $this->in_default_dir( $srce ) && ! $conditional ) {

		// A single item may alias a set of items, by having dependencies, but no source.

		if ( ! $obj->src ) {

			return true;

		}

		$tag = "{$cond_before}{$before_handle}<script type='text/javascript' src='$src'></script>\n{$after_handle}{$cond_after}";

		/**

		 * Filters the HTML script tag of an enqueued script.

	 * Adds extra code to a registered script.

	 *

	 * @since 4.5.0

	 *

	 * @param string $handle   Name of the script to add the inline script to. Must be lowercase.

	 * @param string $data     String containing the javascript to be added.

	 * @param string $position Optional. Whether to add the inline script before the handle

	 *                         or after. Default 'after'.

	 * @return bool True on success, false on failure.

	 */

	public function add_inline_script( $handle, $data, $position = 'after' ) {

		if ( ! $data ) {

			return false;

		}

		if ( 'after' !== $position ) {

			$position = 'before';

		}

		$script   = (array) $this->get_data( $handle, $position );

		$script[] = $data;

		return $this->add_data( $handle, $position, $script );

	}

	/**

	 * Prints inline scripts registered for a specific handle.

	 *

	 * @since 4.5.0

	 * @param string $handle   Name of the script to add the inline script to. Must be lowercase.

	 * @param string $position Optional. Whether to add the inline script before the handle

	 *                         or after. Default 'after'.

	 * @param bool $echo       Optional. Whether to echo the script instead of just returning it.

	 *                         Default true.

	 * @return string|false Script on success, false otherwise.

	 */

	public function print_inline_script( $handle, $position = 'after', $echo = true ) {

		$output = $this->get_data( $handle, $position );

		if ( empty( $output ) ) {

			return false;

		}

		$output = trim( implode( "\n", $output ), "\n" );

		if ( $echo ) {

			printf( "<script type='text/javascript'>\n%s\n</script>\n", $output );

		}

		return $output;

	}

	/**

	 * Localizes a script, only if the script has already been added.

	 *

	 * @since 2.1.0

	 *

	 * @param string $handle

	 * @param string $object_name

	 * @param array $l10n

	 * @return bool