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class.wp-dependencies.php (12868B)

---

 <?php
 /**
  * Dependencies API: WP_Dependencies base class
  *
  * @since 2.6.0
  *
  * @package WordPress
  * @subpackage Dependencies
  */
 
 /**
  * Core base class extended to register items.
  *
  * @since 2.6.0
  *
  * @see _WP_Dependency
  */
 class WP_Dependencies {
 	/**
 	 * An array of registered handle objects.
 	 *
 	 * @since 2.6.8
 	 * @var array
 	 */
 	public $registered = array();
 
 	/**
 	 * An array of handles of queued objects.
 	 *
 	 * @since 2.6.8
 	 * @var string[]
 	 */
 	public $queue = array();
 
 	/**
 	 * An array of handles of objects to queue.
 	 *
 	 * @since 2.6.0
 	 * @var string[]
 	 */
 	public $to_do = array();
 
 	/**
 	 * An array of handles of objects already queued.
 	 *
 	 * @since 2.6.0
 	 * @var string[]
 	 */
 	public $done = array();
 
 	/**
 	 * An array of additional arguments passed when a handle is registered.
 	 *
 	 * Arguments are appended to the item query string.
 	 *
 	 * @since 2.6.0
 	 * @var array
 	 */
 	public $args = array();
 
 	/**
 	 * An array of handle groups to enqueue.
 	 *
 	 * @since 2.8.0
 	 * @var array
 	 */
 	public $groups = array();
 
 	/**
 	 * A handle group to enqueue.
 	 *
 	 * @since 2.8.0
 	 * @deprecated 4.5.0
 	 * @var int
 	 */
 	public $group = 0;
 
 	/**
 	 * Cached lookup array of flattened queued items and dependencies.
 	 *
 	 * @since 5.4.0
 	 * @var array
 	 */
 	private $all_queued_deps;
 
 	/**
 	 * Processes the items and dependencies.
 	 *
 	 * Processes the items passed to it or the queue, and their dependencies.
 	 *
 	 * @since 2.6.0
 	 * @since 2.8.0 Added the `$group` parameter.
 	 *
 	 * @param string|string[]|false $handles Optional. Items to be processed: queue (false),
 	 *                                       single item (string), or multiple items (array of strings).
 	 *                                       Default false.
 	 * @param int|false             $group   Optional. Group level: level (int), no groups (false).
 	 * @return string[] Array of handles of items that have been processed.
 	 */
 	public function do_items( $handles = false, $group = false ) {
 		/*
 		 * If nothing is passed, print the queue. If a string is passed,
 		 * print that item. If an array is passed, print those items.
 		 */
 		$handles = false === $handles ? $this->queue : (array) $handles;
 		$this->all_deps( $handles );
 
 		foreach ( $this->to_do as $key => $handle ) {
 			if ( ! in_array( $handle, $this->done, true ) && isset( $this->registered[ $handle ] ) ) {
 				/*
 				 * Attempt to process the item. If successful,
 				 * add the handle to the done array.
 				 *
 				 * Unset the item from the to_do array.
 				 */
 				if ( $this->do_item( $handle, $group ) ) {
 					$this->done[] = $handle;
 				}
 
 				unset( $this->to_do[ $key ] );
 			}
 		}
 
 		return $this->done;
 	}
 
 	/**
 	 * Processes a dependency.
 	 *
 	 * @since 2.6.0
 	 * @since 5.5.0 Added the `$group` parameter.
 	 *
 	 * @param string    $handle Name of the item. Should be unique.
 	 * @param int|false $group  Optional. Group level: level (int), no groups (false).
 	 *                          Default false.
 	 * @return bool True on success, false if not set.
 	 */
 	public function do_item( $handle, $group = false ) {
 		return isset( $this->registered[ $handle ] );
 	}
 
 	/**
 	 * Determines dependencies.
 	 *
 	 * Recursively builds an array of items to process taking
 	 * dependencies into account. Does NOT catch infinite loops.
 	 *
 	 * @since 2.1.0
 	 * @since 2.6.0 Moved from `WP_Scripts`.
 	 * @since 2.8.0 Added the `$group` parameter.
 	 *
 	 * @param string|string[] $handles   Item handle (string) or item handles (array of strings).
 	 * @param bool            $recursion Optional. Internal flag that function is calling itself.
 	 *                                   Default false.
 	 * @param int|false       $group     Optional. Group level: level (int), no groups (false).
 	 *                                   Default false.
 	 * @return bool True on success, false on failure.
 	 */
 	public function all_deps( $handles, $recursion = false, $group = false ) {
 		$handles = (array) $handles;
 		if ( ! $handles ) {
 			return false;
 		}
 
 		foreach ( $handles as $handle ) {
 			$handle_parts = explode( '?', $handle );
 			$handle       = $handle_parts[0];
 			$queued       = in_array( $handle, $this->to_do, true );
 
 			if ( in_array( $handle, $this->done, true ) ) { // Already done.
 				continue;
 			}
 
 			$moved     = $this->set_group( $handle, $recursion, $group );
 			$new_group = $this->groups[ $handle ];
 
 			if ( $queued && ! $moved ) { // Already queued and in the right group.
 				continue;
 			}
 
 			$keep_going = true;
 			if ( ! isset( $this->registered[ $handle ] ) ) {
 				$keep_going = false; // Item doesn't exist.
 			} elseif ( $this->registered[ $handle ]->deps && array_diff( $this->registered[ $handle ]->deps, array_keys( $this->registered ) ) ) {
 				$keep_going = false; // Item requires dependencies that don't exist.
 			} elseif ( $this->registered[ $handle ]->deps && ! $this->all_deps( $this->registered[ $handle ]->deps, true, $new_group ) ) {
 				$keep_going = false; // Item requires dependencies that don't exist.
 			}
 
 			if ( ! $keep_going ) { // Either item or its dependencies don't exist.
 				if ( $recursion ) {
 					return false; // Abort this branch.
 				} else {
 					continue; // We're at the top level. Move on to the next one.
 				}
 			}
 
 			if ( $queued ) { // Already grabbed it and its dependencies.
 				continue;
 			}
 
 			if ( isset( $handle_parts[1] ) ) {
 				$this->args[ $handle ] = $handle_parts[1];
 			}
 
 			$this->to_do[] = $handle;
 		}
 
 		return true;
 	}
 
 	/**
 	 * Register an item.
 	 *
 	 * Registers the item if no item of that name already exists.
 	 *
 	 * @since 2.1.0
 	 * @since 2.6.0 Moved from `WP_Scripts`.
 	 *
 	 * @param string           $handle Name of the item. Should be unique.
 	 * @param string|bool      $src    Full URL of the item, or path of the item relative
 	 *                                 to the WordPress root directory. If source is set to false,
 	 *                                 item is an alias of other items it depends on.
 	 * @param string[]         $deps   Optional. An array of registered item handles this item depends on.
 	 *                                 Default empty array.
 	 * @param string|bool|null $ver    Optional. String specifying item version number, if it has one,
 	 *                                 which is added to the URL as a query string for cache busting purposes.
 	 *                                 If version is set to false, a version number is automatically added
 	 *                                 equal to current installed WordPress version.
 	 *                                 If set to null, no version is added.
 	 * @param mixed            $args   Optional. Custom property of the item. NOT the class property $args.
 	 *                                 Examples: $media, $in_footer.
 	 * @return bool Whether the item has been registered. True on success, false on failure.
 	 */
 	public function add( $handle, $src, $deps = array(), $ver = false, $args = null ) {
 		if ( isset( $this->registered[ $handle ] ) ) {
 			return false;
 		}
 		$this->registered[ $handle ] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );
 		return true;
 	}
 
 	/**
 	 * Add extra item data.
 	 *
 	 * Adds data to a registered item.
 	 *
 	 * @since 2.6.0
 	 *
 	 * @param string $handle Name of the item. Should be unique.
 	 * @param string $key    The data key.
 	 * @param mixed  $value  The data value.
 	 * @return bool True on success, false on failure.
 	 */
 	public function add_data( $handle, $key, $value ) {
 		if ( ! isset( $this->registered[ $handle ] ) ) {
 			return false;
 		}
 
 		return $this->registered[ $handle ]->add_data( $key, $value );
 	}
 
 	/**
 	 * Get extra item data.
 	 *
 	 * Gets data associated with a registered item.
 	 *
 	 * @since 3.3.0
 	 *
 	 * @param string $handle Name of the item. Should be unique.
 	 * @param string $key    The data key.
 	 * @return mixed Extra item data (string), false otherwise.
 	 */
 	public function get_data( $handle, $key ) {
 		if ( ! isset( $this->registered[ $handle ] ) ) {
 			return false;
 		}
 
 		if ( ! isset( $this->registered[ $handle ]->extra[ $key ] ) ) {
 			return false;
 		}
 
 		return $this->registered[ $handle ]->extra[ $key ];
 	}
 
 	/**
 	 * Un-register an item or items.
 	 *
 	 * @since 2.1.0
 	 * @since 2.6.0 Moved from `WP_Scripts`.
 	 *
 	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
 	 */
 	public function remove( $handles ) {
 		foreach ( (array) $handles as $handle ) {
 			unset( $this->registered[ $handle ] );
 		}
 	}
 
 	/**
 	 * Queue an item or items.
 	 *
 	 * Decodes handles and arguments, then queues handles and stores
 	 * arguments in the class property $args. For example in extending
 	 * classes, $args is appended to the item url as a query string.
 	 * Note $args is NOT the $args property of items in the $registered array.
 	 *
 	 * @since 2.1.0
 	 * @since 2.6.0 Moved from `WP_Scripts`.
 	 *
 	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
 	 */
 	public function enqueue( $handles ) {
 		foreach ( (array) $handles as $handle ) {
 			$handle = explode( '?', $handle );
 
 			if ( ! in_array( $handle[0], $this->queue, true ) && isset( $this->registered[ $handle[0] ] ) ) {
 				$this->queue[] = $handle[0];
 
 				// Reset all dependencies so they must be recalculated in recurse_deps().
 				$this->all_queued_deps = null;
 
 				if ( isset( $handle[1] ) ) {
 					$this->args[ $handle[0] ] = $handle[1];
 				}
 			}
 		}
 	}
 
 	/**
 	 * Dequeue an item or items.
 	 *
 	 * Decodes handles and arguments, then dequeues handles
 	 * and removes arguments from the class property $args.
 	 *
 	 * @since 2.1.0
 	 * @since 2.6.0 Moved from `WP_Scripts`.
 	 *
 	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
 	 */
 	public function dequeue( $handles ) {
 		foreach ( (array) $handles as $handle ) {
 			$handle = explode( '?', $handle );
 			$key    = array_search( $handle[0], $this->queue, true );
 
 			if ( false !== $key ) {
 				// Reset all dependencies so they must be recalculated in recurse_deps().
 				$this->all_queued_deps = null;
 
 				unset( $this->queue[ $key ] );
 				unset( $this->args[ $handle[0] ] );
 			}
 		}
 	}
 
 	/**
 	 * Recursively search the passed dependency tree for $handle.
 	 *
 	 * @since 4.0.0
 	 *
 	 * @param string[] $queue  An array of queued _WP_Dependency handles.
 	 * @param string   $handle Name of the item. Should be unique.
 	 * @return bool Whether the handle is found after recursively searching the dependency tree.
 	 */
 	protected function recurse_deps( $queue, $handle ) {
 		if ( isset( $this->all_queued_deps ) ) {
 			return isset( $this->all_queued_deps[ $handle ] );
 		}
 
 		$all_deps = array_fill_keys( $queue, true );
 		$queues   = array();
 		$done     = array();
 
 		while ( $queue ) {
 			foreach ( $queue as $queued ) {
 				if ( ! isset( $done[ $queued ] ) && isset( $this->registered[ $queued ] ) ) {
 					$deps = $this->registered[ $queued ]->deps;
 					if ( $deps ) {
 						$all_deps += array_fill_keys( $deps, true );
 						array_push( $queues, $deps );
 					}
 					$done[ $queued ] = true;
 				}
 			}
 			$queue = array_pop( $queues );
 		}
 
 		$this->all_queued_deps = $all_deps;
 
 		return isset( $this->all_queued_deps[ $handle ] );
 	}
 
 	/**
 	 * Query list for an item.
 	 *
 	 * @since 2.1.0
 	 * @since 2.6.0 Moved from `WP_Scripts`.
 	 *
 	 * @param string $handle Name of the item. Should be unique.
 	 * @param string $list   Optional. Property name of list array. Default 'registered'.
 	 * @return bool|_WP_Dependency Found, or object Item data.
 	 */
 	public function query( $handle, $list = 'registered' ) {
 		switch ( $list ) {
 			case 'registered':
 			case 'scripts': // Back compat.
 				if ( isset( $this->registered[ $handle ] ) ) {
 					return $this->registered[ $handle ];
 				}
 				return false;
 
 			case 'enqueued':
 			case 'queue':
 				if ( in_array( $handle, $this->queue, true ) ) {
 					return true;
 				}
 				return $this->recurse_deps( $this->queue, $handle );
 
 			case 'to_do':
 			case 'to_print': // Back compat.
 				return in_array( $handle, $this->to_do, true );
 
 			case 'done':
 			case 'printed': // Back compat.
 				return in_array( $handle, $this->done, true );
 		}
 		return false;
 	}
 
 	/**
 	 * Set item group, unless already in a lower group.
 	 *
 	 * @since 2.8.0
 	 *
 	 * @param string    $handle    Name of the item. Should be unique.
 	 * @param bool      $recursion Internal flag that calling function was called recursively.
 	 * @param int|false $group     Group level: level (int), no groups (false).
 	 * @return bool Not already in the group or a lower group.
 	 */
 	public function set_group( $handle, $recursion, $group ) {
 		$group = (int) $group;
 
 		if ( isset( $this->groups[ $handle ] ) && $this->groups[ $handle ] <= $group ) {
 			return false;
 		}
 
 		$this->groups[ $handle ] = $group;
 
 		return true;
 	}
 
 }