<h2>File Contents: /home/planet5/www/yogitonics.com/wp-includes/class-wp-icons-registry.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/www/yogitonics.com/wp-includes/class-wp-icons-registry.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php
/**
 * Icons API: WP_Icons_Registry class
 *
 * @package WordPress
 * @since 7.0.0
 */

/**
 * Core class used for interacting with registered icons.
 *
 * @since 7.0.0
 */
class WP_Icons_Registry {
	/**
	 * Registered icons array.
	 *
	 * @since 7.0.0
	 * @var array[]
	 */
	protected $registered_icons = array();

	/**
	 * Container for the main instance of the class.
	 *
	 * @since 7.0.0
	 * @var WP_Icons_Registry|null
	 */
	protected static $instance = null;

	/**
	 * Constructor.
	 *
	 * WP_Icons_Registry is a singleton class, so keep this protected.
	 *
	 * Icons are populated via `_wp_register_default_icons()` during the
	 * `init` action. Third-party icons can be registered via
	 * {@see wp_register_icon()} once their collection is registered.
	 *
	 * @since 7.0.0
	 */
	protected function __construct() {}

	/**
	 * Registers an icon.
	 *
	 * @since 7.0.0
	 * @since 7.1.0 The icon name must be namespaced in the form &quot;collection/icon-name&quot;.
	 *
	 * @param string $icon_name       Namespaced icon name in the form &quot;collection/icon-name&quot;
	 *                                (e.g. &quot;core/arrow-left&quot;).
	 * @param array  $icon_properties {
	 *     List of properties for the icon.
	 *
	 *     @type string $label     Required. A human-readable label for the icon.
	 *     @type string $content   Optional. SVG markup for the icon.
	 *                             If not provided, the content will be retrieved from the `file_path` if set.
	 *                             If both `content` and `file_path` are not set, the icon will not be registered.
	 *     @type string $file_path Optional. The full path to the file containing the icon content.
	 * }
	 * @return bool True if the icon was registered with success and false otherwise.
	 */
	public function register( $icon_name, $icon_properties ) {
		if ( ! isset( $icon_name ) || ! is_string( $icon_name ) ) {
			_doing_it_wrong(
				__METHOD__,
				__( &#039;Icon name must be a string.&#039; ),
				&#039;7.0.0&#039;
			);
			return false;
		}

		// Require a namespaced name in the form &quot;collection/icon-name&quot;.
		if ( ! str_contains( $icon_name, &#039;/&#039; ) ) {
			_doing_it_wrong(
				__METHOD__,
				__( &#039;Icon name must be namespaced in the form &quot;collection/icon-name&quot;.&#039; ),
				&#039;7.1.0&#039;
			);
			return false;
		}

		// Split the namespaced name into a collection slug and an unqualified icon name.
		list( $collection, $unqualified_name ) = explode( &#039;/&#039;, $icon_name, 2 );

		if ( preg_match( &#039;/[A-Z]/&#039;, $unqualified_name ) ) {
			_doing_it_wrong(
				__METHOD__,
				__( &#039;Icon names must not contain uppercase characters.&#039; ),
				&#039;7.1.0&#039;
			);
			return false;
		}

		if ( ! preg_match( &#039;/^[a-z0-9](?:[a-z0-9_-]*[a-z0-9])?$/&#039;, $unqualified_name ) ) {
			_doing_it_wrong(
				__METHOD__,
				__( &#039;Icon names must start and end with a lowercase letter or digit and contain only lowercase letters, digits, hyphens, and underscores.&#039; ),
				&#039;7.1.0&#039;
			);
			return false;
		}

		$allowed_keys = array_fill_keys( array( &#039;label&#039;, &#039;content&#039;, &#039;file_path&#039; ), 1 );
		foreach ( array_keys( $icon_properties ) as $key ) {
			if ( ! array_key_exists( $key, $allowed_keys ) ) {
				_doing_it_wrong(
					__METHOD__,
					sprintf(
						/* translators: %s: The name of a user-provided key. */
						__( &#039;Invalid icon property: &quot;%s&quot;.&#039; ),
						$key
					),
					&#039;7.0.0&#039;
				);
				return false;
			}
		}

		if ( ! WP_Icon_Collections_Registry::get_instance()-&gt;is_registered( $collection ) ) {
			_doing_it_wrong(
				__METHOD__,
				sprintf(
					/* translators: %s: Icon collection slug. */
					__( &#039;Icon collection &quot;%s&quot; is not registered.&#039; ),
					$collection
				),
				&#039;7.1.0&#039;
			);
			return false;
		}

		if ( ! isset( $icon_properties[&#039;label&#039;] ) || ! is_string( $icon_properties[&#039;label&#039;] ) ) {
			_doing_it_wrong(
				__METHOD__,
				__( &#039;Icon label must be a string.&#039; ),
				&#039;7.0.0&#039;
			);
			return false;
		}

		if (
			( ! isset( $icon_properties[&#039;content&#039;] ) &amp;&amp; ! isset( $icon_properties[&#039;file_path&#039;] ) ) ||
			( isset( $icon_properties[&#039;content&#039;] ) &amp;&amp; isset( $icon_properties[&#039;file_path&#039;] ) )
		) {
			_doing_it_wrong(
				__METHOD__,
				__( &#039;Icons must provide either `content` or `file_path`.&#039; ),
				&#039;7.0.0&#039;
			);
			return false;
		}

		if ( isset( $icon_properties[&#039;content&#039;] ) ) {
			if ( ! is_string( $icon_properties[&#039;content&#039;] ) ) {
				_doing_it_wrong(
					__METHOD__,
					__( &#039;Icon content must be a string.&#039; ),
					&#039;7.0.0&#039;
				);
				return false;
			}

			$sanitized_icon_content = $this-&gt;sanitize_icon_content( $icon_properties[&#039;content&#039;] );
			if ( empty( $sanitized_icon_content ) ) {
				_doing_it_wrong(
					__METHOD__,
					__( &#039;Icon content does not contain valid SVG markup.&#039; ),
					&#039;7.0.0&#039;
				);
				return false;
			}

			$icon_properties[&#039;content&#039;] = $sanitized_icon_content;
		}

		$qualified_name = $collection . &#039;/&#039; . $unqualified_name;

		if ( $this-&gt;is_registered( $qualified_name ) ) {
			_doing_it_wrong(
				__METHOD__,
				__( &#039;Icon is already registered.&#039; ),
				&#039;7.1.0&#039;
			);
			return false;
		}

		$icon = array_merge(
			$icon_properties,
			array(
				&#039;name&#039;       =&gt; $qualified_name,
				&#039;collection&#039; =&gt; $collection,
			)
		);

		$this-&gt;registered_icons[ $qualified_name ] = $icon;

		return true;
	}

	/**
	 * Unregisters an icon.
	 *
	 * @since 7.1.0
	 *
	 * @param string $icon_name Namespaced icon name in the form &quot;collection/icon-name&quot;
	 *                          (e.g. &quot;core/arrow-left&quot;).
	 * @return bool True if the icon was unregistered successfully, false otherwise.
	 */
	public function unregister( $icon_name ) {
		if ( ! $this-&gt;is_registered( $icon_name ) ) {
			_doing_it_wrong(
				__METHOD__,
				sprintf(
					/* translators: %s: Icon name. */
					__( &#039;Icon &quot;%s&quot; is not registered.&#039; ),
					$icon_name
				),
				&#039;7.1.0&#039;
			);
			return false;
		}

		unset( $this-&gt;registered_icons[ $icon_name ] );
		return true;
	}

	/**
	 * Sanitizes the icon SVG content.
	 *
	 * Logic borrowed from twentytwenty.
	 * @see twentytwenty_get_theme_svg
	 *
	 * @since 7.0.0
	 *
	 * @param string $icon_content The icon SVG content to sanitize.
	 * @return string The sanitized icon SVG content.
	 */
	protected function sanitize_icon_content( $icon_content ) {
		$allowed_tags = array(
			&#039;svg&#039;     =&gt; array(
				&#039;class&#039;       =&gt; true,
				&#039;xmlns&#039;       =&gt; true,
				&#039;width&#039;       =&gt; true,
				&#039;height&#039;      =&gt; true,
				&#039;viewbox&#039;     =&gt; true,
				&#039;aria-hidden&#039; =&gt; true,
				&#039;role&#039;        =&gt; true,
				&#039;focusable&#039;   =&gt; true,
			),
			&#039;path&#039;    =&gt; array(
				&#039;fill&#039;      =&gt; true,
				&#039;fill-rule&#039; =&gt; true,
				&#039;d&#039;         =&gt; true,
				&#039;transform&#039; =&gt; true,
			),
			&#039;polygon&#039; =&gt; array(
				&#039;fill&#039;      =&gt; true,
				&#039;fill-rule&#039; =&gt; true,
				&#039;points&#039;    =&gt; true,
				&#039;transform&#039; =&gt; true,
				&#039;focusable&#039; =&gt; true,
			),
		);
		return wp_kses( $icon_content, $allowed_tags );
	}

	/**
	 * Retrieves the content of a registered icon.
	 *
	 * @since 7.0.0
	 *
	 * @param string $icon_name Icon name including namespace.
	 * @return string|null The content of the icon, if found.
	 */
	protected function get_content( $icon_name ) {
		if ( ! isset( $this-&gt;registered_icons[ $icon_name ][&#039;content&#039;] ) ) {
			$file_path  = $this-&gt;registered_icons[ $icon_name ][&#039;file_path&#039;] ?? &#039;&#039;;
			$is_stringy = is_string( $file_path ) || ( is_object( $file_path ) &amp;&amp; method_exists( $file_path, &#039;__toString&#039; ) );
			$icon_path  = $is_stringy ? realpath( (string) $file_path ) : false;

			if (
				! is_string( $icon_path ) ||
				! str_ends_with( $icon_path, &#039;.svg&#039; ) ||
				! is_file( $icon_path ) ||
				! is_readable( $icon_path )
			) {
				wp_trigger_error(
					__METHOD__,
					__( &#039;Icon file is missing or unreadable.&#039; )
				);
				return null;
			}

			$content = $this-&gt;sanitize_icon_content( file_get_contents( $icon_path ) );

			if ( empty( $content ) ) {
				wp_trigger_error(
					__METHOD__,
					__( &#039;Icon content does not contain valid SVG markup.&#039; )
				);
				return null;
			}

			$this-&gt;registered_icons[ $icon_name ][&#039;content&#039;] = $content;
		}
		return $this-&gt;registered_icons[ $icon_name ][&#039;content&#039;];
	}

	/**
	 * Retrieves an array containing the properties of a registered icon.
	 *
	 * @since 7.0.0
	 *
	 * @param string $icon_name Icon name including namespace.
	 * @return array|null Registered icon properties or `null` if the icon is not registered.
	 */
	public function get_registered_icon( $icon_name ) {
		if ( ! $this-&gt;is_registered( $icon_name ) ) {
			return null;
		}

		$icon            = $this-&gt;registered_icons[ $icon_name ];
		$icon[&#039;content&#039;] = $icon[&#039;content&#039;] ?? $this-&gt;get_content( $icon_name );

		return $icon;
	}

	/**
	 * Retrieves all registered icons.
	 *
	 * @since 7.0.0
	 * @since 7.1.0 Search also matches icon labels.
	 *
	 * @param string $search Optional. Search term by which to filter the icons.
	 * @return array[] Array of arrays containing the registered icon properties.
	 */
	public function get_registered_icons( $search = &#039;&#039; ) {
		$icons = array();

		foreach ( $this-&gt;registered_icons as $icon ) {
			if ( ! empty( $search )
				&amp;&amp; false === stripos( $icon[&#039;name&#039;], $search )
				&amp;&amp; false === stripos( $icon[&#039;label&#039;] ?? &#039;&#039;, $search )
			) {
				continue;
			}

			$icon[&#039;content&#039;] = $icon[&#039;content&#039;] ?? $this-&gt;get_content( $icon[&#039;name&#039;] );
			$icons[]         = $icon;
		}

		return $icons;
	}

	/**
	 * Checks if an icon is registered.
	 *
	 * @since 7.0.0
	 *
	 * @param string $icon_name Icon name including namespace.
	 * @return bool True if the icon is registered, false otherwise.
	 */
	public function is_registered( $icon_name ) {
		return isset( $this-&gt;registered_icons[ $icon_name ] );
	}

	/**
	 * Utility method to retrieve the main instance of the class.
	 *
	 * The instance will be created if it does not exist yet.
	 *
	 * @since 7.0.0
	 *
	 * @return WP_Icons_Registry The main instance.
	 */
	public static function get_instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}

		return self::$instance;
	}
}
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