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<?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 / #[AllowDynamicProperties] class WP_Dependencies { /* * An array of all registered dependencies keyed by handle. * * @since 2.6.8 * * @var _WP_Dependency[] / public $registered = array(); /* * An array of handles of queued dependencies. * * @since 2.6.8 * * @var string[] / public $queue = array(); /* * An array of handles of dependencies to queue. * * @since 2.6.0 * * @var string[] / public $to_do = array(); /* * An array of handles of dependencies 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 dependency groups to enqueue. * * Each entry is keyed by handle and represents the integer group level or boolean * false if the handle has no group. * * @since 2.8.0 * * @var (int\|false)[] / 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; /* * List of assets enqueued before details were registered. * * @since 5.9.0 * * @var array / private $queued_before_register = array(); /* * Processes the items and dependencies. * * Processes the items passed to it or the queue, and their dependencies. * * @since 2.6.0 * @since 2.8.0 Added the `$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 group (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 group (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 group (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\|false $src Full URL of the item, or path of the item relative * to the WordPress root directory. If source is set to false, * the 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 ); // If the item was enqueued before the details were registered, enqueue it now. if ( array_key_exists( $handle, $this->queued_before_register ) ) { if ( ! is_null( $this->queued_before_register[ $handle ] ) ) { $this->enqueue( $handle . '?' . $this->queued_before_register[ $handle ] ); } else { $this->enqueue( $handle ); } unset( $this->queued_before_register[ $handle ] ); } 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]; } } elseif ( ! isset( $this->registered[ $handle[0] ] ) ) { $this->queued_before_register[ $handle[0] ] = null; // $args if ( isset( $handle[1] ) ) { $this->queued_before_register[ $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] ] ); } elseif ( array_key_exists( $handle[0], $this->queued_before_register ) ) { unset( $this->queued_before_register[ $handle[0] ] ); } } } /* * Recursively search the passed dependency tree for a 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 the 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 $status Optional. Status of the item to query. Default 'registered'. * @return bool\|_WP_Dependency Found, or object Item data. / public function query( $handle, $status = 'registered' ) { switch ( $status ) { case 'registered': case 'scripts': // Back compat. if ( isset( $this->registered[ $handle ] ) ) { return $this->registered[ $handle ]; } return false; case 'enqueued': case 'queue': // Back compat. 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 group (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; } /* * Get etag header for cache validation. * * @since 6.7.0 * * @global string $wp_version The WordPress version string. * * @param string[] $load Array of script or style handles to load. * @return string Etag header. / public function get_etag( $load ) { / * Note: wp_get_wp_version() is not used here, as this file can be included * via wp-admin/load-scripts.php or wp-admin/load-styles.php, in which case * wp-includes/functions.php is not loaded. / global $wp_version; $etag = "WP:{$wp_version};"; foreach ( $load as $handle ) { if ( ! array_key_exists( $handle, $this->registered ) ) { continue; } $ver = $this->registered[ $handle ]->ver ?? $wp_version; $etag .= "{$handle}:{$ver};"; } / * This is not intended to be cryptographically secure, just a fast way to get * a fixed length string based on the script versions. As this file does not * load the full WordPress environment, it is not possible to use the salted * wp_hash() function. */ return 'W/"' . md5( $etag ) . '"'; } }

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