* Dependencies API: WP_Styles class

 * @since 2.6.0

 * @package WordPress

 * @subpackage Dependencies

 * Core class used to register styles.

 * @since 2.6.0

 *

 * @see WP_Dependencies

	/**

	 * Base URL for styles.

	 *

	 * Full URL with trailing slash.

	 *

	 * @since 2.6.0

	 * @var string

	 */

	/**

	 * URL of the content directory.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Default version string for stylesheets.

	 *

	 * @since 2.6.0

	 * @var string

	 */

	/**

	 * The current text direction.

	 *

	 * @since 2.6.0

	 * @var string

	 */

	/**

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

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Holds a string which contains style 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 styles and additional data if concatenation

	 * is enabled.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	/**

	 * Holds inline styles if concatenation is enabled.

	 *

	 * @since 3.3.0

	 * @var string

	 */

	/**

	 * List of default directories.

	 *

	 * @since 2.8.0

	 * @var array

	 */

	/**

	 * Constructor.

	 *

	 * @since 2.6.0

	 */

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

	 * Processes a style dependency.

	 *

	 * @since 2.6.0

	 *

	 * @see WP_Dependencies::do_item()

	 *

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

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

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

		if ( ! $obj->src ) {

			if ( $inline_style = $this->print_inline_style( $handle, false ) ) {

				$inline_style = sprintf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $inline_style );

				if ( $this->do_concat ) {

					$this->print_html .= $inline_style;

				} else {

					echo $inline_style;

				}

			}

		$href = $this->_css_href( $obj->src, $ver, $handle );

		if ( ! $href ) {

			return true;

		}

		 * Filters the HTML link tag of an enqueued style.

		 * @since 4.3.0 Introduced the `$href` parameter.

		 * @since 4.5.0 Introduced the `$media` parameter.

		 * @param string $html   The link tag for the enqueued style.

		 * @param string $href   The stylesheet's source URL.

		 * @param string $media  The stylesheet's media attribute.

		$tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-css' $title href='$href' type='text/css' media='$media' />\n", $handle, $href, $media);

			$rtl_tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-rtl-css' $title href='$rtl_href' type='text/css' media='$media' />\n", $handle, $rtl_href, $media );

	 * Adds extra CSS styles to a registered stylesheet.

	 *

	 * @since 3.3.0

	 *

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

	 * @param string $code   String containing the CSS styles to be added.

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

	 * Prints extra CSS styles of a registered stylesheet.

	 *

	 * @since 3.3.0

	 *

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

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

	 *                       Default true.

	 * @return string|bool False if no data exists, inline styles if `$echo` is true, true otherwise.

	 * Determines style dependencies.

	 *

	 * @since 2.6.0

	 *

	 * @see WP_Dependencies::all_deps()

	 *

	 * @param mixed     $handles   Item handle and argument (string) or item handles and arguments (array of strings).

	 * @param bool      $recursion Internal flag that function is calling itself.

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

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

		$r = parent::all_deps( $handles, $recursion, $group );

		if ( ! $recursion ) {

			 * Filters the array of enqueued styles before processing for output.

	 * Generates an enqueued style's fully-qualified URL.

	 *

	 * @since 2.6.0

	 *

	 * @param string $src The source of the enqueued style.

	 * @param string $ver The version of the enqueued style.

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

	 * @return string Style's fully-qualified URL.

		 * Filters an enqueued style's fully-qualified URL.

	 * Whether a handle's source is in a default directory.

	 *

	 * @since 2.8.0

	 *

	 * @param string $src The source of the enqueued style.

	 * @return bool True if found, false if not.

	public function in_default_dir( $src ) {

	/**

	 * Processes items and dependencies for the footer group.

	 *

	 * HTML 5 allows styles in the body, grab late enqueued items and output them in the footer.

	 *

	 * @since 3.3.0

	 *

	 * @see WP_Dependencies::do_items()

	 *

	 * @return array Handles of items that have been processed.

	 */

	public function do_footer_items() {

	/**

	 * Resets class properties.

	 *

	 * @since 3.3.0

	 */