495 lines
14 KiB
PHP
495 lines
14 KiB
PHP
<?php
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/**
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* Dependencies API: WP_Dependencies base class
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*
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* @since 2.6.0
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*
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* @package WordPress
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* @subpackage Dependencies
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*/
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/**
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* Core base class extended to register items.
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*
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* @since 2.6.0
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*
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* @see _WP_Dependency
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*/
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#[AllowDynamicProperties]
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class WP_Dependencies {
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/**
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* An array of all registered dependencies keyed by handle.
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*
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* @since 2.6.8
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*
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* @var _WP_Dependency[]
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*/
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public $registered = array();
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/**
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* An array of handles of queued dependencies.
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*
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* @since 2.6.8
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*
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* @var string[]
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*/
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public $queue = array();
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/**
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* An array of handles of dependencies to queue.
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*
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* @since 2.6.0
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*
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* @var string[]
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*/
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public $to_do = array();
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/**
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* An array of handles of dependencies already queued.
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*
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* @since 2.6.0
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*
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* @var string[]
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*/
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public $done = array();
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/**
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* An array of additional arguments passed when a handle is registered.
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*
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* Arguments are appended to the item query string.
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*
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* @since 2.6.0
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*
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* @var array
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*/
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public $args = array();
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/**
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* An array of dependency groups to enqueue.
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*
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* Each entry is keyed by handle and represents the integer group level or boolean
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* false if the handle has no group.
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*
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* @since 2.8.0
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*
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* @var (int|false)[]
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*/
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public $groups = array();
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/**
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* A handle group to enqueue.
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*
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* @since 2.8.0
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*
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* @deprecated 4.5.0
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* @var int
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*/
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public $group = 0;
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/**
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* Cached lookup array of flattened queued items and dependencies.
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*
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* @since 5.4.0
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*
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* @var array
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*/
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private $all_queued_deps;
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/**
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* List of assets enqueued before details were registered.
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*
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* @since 5.9.0
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*
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* @var array
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*/
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private $queued_before_register = array();
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/**
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* Processes the items and dependencies.
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*
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* Processes the items passed to it or the queue, and their dependencies.
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*
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* @since 2.6.0
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* @since 2.8.0 Added the `$group` parameter.
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*
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* @param string|string[]|false $handles Optional. Items to be processed: queue (false),
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* single item (string), or multiple items (array of strings).
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* Default false.
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* @param int|false $group Optional. Group level: level (int), no group (false).
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* @return string[] Array of handles of items that have been processed.
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*/
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public function do_items( $handles = false, $group = false ) {
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/*
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* If nothing is passed, print the queue. If a string is passed,
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* print that item. If an array is passed, print those items.
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*/
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$handles = false === $handles ? $this->queue : (array) $handles;
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$this->all_deps( $handles );
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foreach ( $this->to_do as $key => $handle ) {
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if ( ! in_array( $handle, $this->done, true ) && isset( $this->registered[ $handle ] ) ) {
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/*
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* Attempt to process the item. If successful,
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* add the handle to the done array.
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*
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* Unset the item from the to_do array.
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*/
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if ( $this->do_item( $handle, $group ) ) {
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$this->done[] = $handle;
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}
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unset( $this->to_do[ $key ] );
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}
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}
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return $this->done;
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}
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/**
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* Processes a dependency.
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*
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* @since 2.6.0
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* @since 5.5.0 Added the `$group` parameter.
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*
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* @param string $handle Name of the item. Should be unique.
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* @param int|false $group Optional. Group level: level (int), no group (false).
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* Default false.
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* @return bool True on success, false if not set.
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*/
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public function do_item( $handle, $group = false ) {
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return isset( $this->registered[ $handle ] );
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}
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/**
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* Determines dependencies.
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*
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* Recursively builds an array of items to process taking
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* dependencies into account. Does NOT catch infinite loops.
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*
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* @since 2.1.0
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* @since 2.6.0 Moved from `WP_Scripts`.
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* @since 2.8.0 Added the `$group` parameter.
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*
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* @param string|string[] $handles Item handle (string) or item handles (array of strings).
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* @param bool $recursion Optional. Internal flag that function is calling itself.
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* Default false.
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* @param int|false $group Optional. Group level: level (int), no group (false).
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function all_deps( $handles, $recursion = false, $group = false ) {
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$handles = (array) $handles;
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if ( ! $handles ) {
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return false;
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}
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foreach ( $handles as $handle ) {
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$handle_parts = explode( '?', $handle );
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$handle = $handle_parts[0];
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$queued = in_array( $handle, $this->to_do, true );
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if ( in_array( $handle, $this->done, true ) ) { // Already done.
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continue;
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}
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$moved = $this->set_group( $handle, $recursion, $group );
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$new_group = $this->groups[ $handle ];
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if ( $queued && ! $moved ) { // Already queued and in the right group.
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continue;
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}
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$keep_going = true;
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if ( ! isset( $this->registered[ $handle ] ) ) {
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$keep_going = false; // Item doesn't exist.
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} elseif ( $this->registered[ $handle ]->deps && array_diff( $this->registered[ $handle ]->deps, array_keys( $this->registered ) ) ) {
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$keep_going = false; // Item requires dependencies that don't exist.
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} elseif ( $this->registered[ $handle ]->deps && ! $this->all_deps( $this->registered[ $handle ]->deps, true, $new_group ) ) {
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$keep_going = false; // Item requires dependencies that don't exist.
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}
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if ( ! $keep_going ) { // Either item or its dependencies don't exist.
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if ( $recursion ) {
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return false; // Abort this branch.
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} else {
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continue; // We're at the top level. Move on to the next one.
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}
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}
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if ( $queued ) { // Already grabbed it and its dependencies.
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continue;
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}
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if ( isset( $handle_parts[1] ) ) {
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$this->args[ $handle ] = $handle_parts[1];
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}
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$this->to_do[] = $handle;
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}
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return true;
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}
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/**
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* Register an item.
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*
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* Registers the item if no item of that name already exists.
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*
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* @since 2.1.0
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* @since 2.6.0 Moved from `WP_Scripts`.
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*
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* @param string $handle Name of the item. Should be unique.
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* @param string|bool $src Full URL of the item, or path of the item relative
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* to the WordPress root directory. If source is set to false,
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* item is an alias of other items it depends on.
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* @param string[] $deps Optional. An array of registered item handles this item depends on.
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* Default empty array.
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* @param string|bool|null $ver Optional. String specifying item version number, if it has one,
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* which is added to the URL as a query string for cache busting purposes.
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* If version is set to false, a version number is automatically added
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* equal to current installed WordPress version.
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* If set to null, no version is added.
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* @param mixed $args Optional. Custom property of the item. NOT the class property $args.
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* Examples: $media, $in_footer.
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* @return bool Whether the item has been registered. True on success, false on failure.
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*/
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public function add( $handle, $src, $deps = array(), $ver = false, $args = null ) {
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if ( isset( $this->registered[ $handle ] ) ) {
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return false;
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}
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$this->registered[ $handle ] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );
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// If the item was enqueued before the details were registered, enqueue it now.
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if ( array_key_exists( $handle, $this->queued_before_register ) ) {
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if ( ! is_null( $this->queued_before_register[ $handle ] ) ) {
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$this->enqueue( $handle . '?' . $this->queued_before_register[ $handle ] );
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} else {
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$this->enqueue( $handle );
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}
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unset( $this->queued_before_register[ $handle ] );
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}
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return true;
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}
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/**
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* Add extra item data.
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*
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* Adds data to a registered item.
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*
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* @since 2.6.0
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*
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* @param string $handle Name of the item. Should be unique.
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* @param string $key The data key.
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* @param mixed $value The data value.
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* @return bool True on success, false on failure.
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*/
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public function add_data( $handle, $key, $value ) {
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if ( ! isset( $this->registered[ $handle ] ) ) {
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return false;
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}
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return $this->registered[ $handle ]->add_data( $key, $value );
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}
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/**
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* Get extra item data.
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*
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* Gets data associated with a registered item.
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*
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* @since 3.3.0
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*
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* @param string $handle Name of the item. Should be unique.
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* @param string $key The data key.
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* @return mixed Extra item data (string), false otherwise.
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*/
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public function get_data( $handle, $key ) {
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if ( ! isset( $this->registered[ $handle ] ) ) {
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return false;
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}
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if ( ! isset( $this->registered[ $handle ]->extra[ $key ] ) ) {
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return false;
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}
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return $this->registered[ $handle ]->extra[ $key ];
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}
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/**
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* Un-register an item or items.
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*
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* @since 2.1.0
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* @since 2.6.0 Moved from `WP_Scripts`.
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*
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* @param string|string[] $handles Item handle (string) or item handles (array of strings).
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*/
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public function remove( $handles ) {
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foreach ( (array) $handles as $handle ) {
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unset( $this->registered[ $handle ] );
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}
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}
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/**
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* Queue an item or items.
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*
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* Decodes handles and arguments, then queues handles and stores
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* arguments in the class property $args. For example in extending
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* classes, $args is appended to the item url as a query string.
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* Note $args is NOT the $args property of items in the $registered array.
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*
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* @since 2.1.0
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* @since 2.6.0 Moved from `WP_Scripts`.
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*
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* @param string|string[] $handles Item handle (string) or item handles (array of strings).
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*/
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public function enqueue( $handles ) {
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foreach ( (array) $handles as $handle ) {
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$handle = explode( '?', $handle );
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if ( ! in_array( $handle[0], $this->queue, true ) && isset( $this->registered[ $handle[0] ] ) ) {
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$this->queue[] = $handle[0];
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// Reset all dependencies so they must be recalculated in recurse_deps().
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$this->all_queued_deps = null;
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if ( isset( $handle[1] ) ) {
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$this->args[ $handle[0] ] = $handle[1];
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}
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} elseif ( ! isset( $this->registered[ $handle[0] ] ) ) {
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$this->queued_before_register[ $handle[0] ] = null; // $args
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if ( isset( $handle[1] ) ) {
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$this->queued_before_register[ $handle[0] ] = $handle[1];
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}
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}
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}
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}
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/**
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* Dequeue an item or items.
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*
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* Decodes handles and arguments, then dequeues handles
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* and removes arguments from the class property $args.
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*
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* @since 2.1.0
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* @since 2.6.0 Moved from `WP_Scripts`.
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*
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* @param string|string[] $handles Item handle (string) or item handles (array of strings).
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*/
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public function dequeue( $handles ) {
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foreach ( (array) $handles as $handle ) {
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$handle = explode( '?', $handle );
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$key = array_search( $handle[0], $this->queue, true );
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if ( false !== $key ) {
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// Reset all dependencies so they must be recalculated in recurse_deps().
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$this->all_queued_deps = null;
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unset( $this->queue[ $key ] );
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unset( $this->args[ $handle[0] ] );
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} elseif ( array_key_exists( $handle[0], $this->queued_before_register ) ) {
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unset( $this->queued_before_register[ $handle[0] ] );
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}
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}
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}
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/**
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* Recursively search the passed dependency tree for a handle.
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*
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* @since 4.0.0
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*
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* @param string[] $queue An array of queued _WP_Dependency handles.
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* @param string $handle Name of the item. Should be unique.
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* @return bool Whether the handle is found after recursively searching the dependency tree.
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*/
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protected function recurse_deps( $queue, $handle ) {
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if ( isset( $this->all_queued_deps ) ) {
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return isset( $this->all_queued_deps[ $handle ] );
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}
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$all_deps = array_fill_keys( $queue, true );
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$queues = array();
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$done = array();
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while ( $queue ) {
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foreach ( $queue as $queued ) {
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if ( ! isset( $done[ $queued ] ) && isset( $this->registered[ $queued ] ) ) {
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$deps = $this->registered[ $queued ]->deps;
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if ( $deps ) {
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$all_deps += array_fill_keys( $deps, true );
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array_push( $queues, $deps );
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}
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$done[ $queued ] = true;
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}
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}
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$queue = array_pop( $queues );
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}
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$this->all_queued_deps = $all_deps;
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return isset( $this->all_queued_deps[ $handle ] );
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}
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/**
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* Query the list for an item.
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*
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* @since 2.1.0
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* @since 2.6.0 Moved from `WP_Scripts`.
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*
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* @param string $handle Name of the item. Should be unique.
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* @param string $status Optional. Status of the item to query. Default 'registered'.
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* @return bool|_WP_Dependency Found, or object Item data.
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*/
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public function query( $handle, $status = 'registered' ) {
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switch ( $status ) {
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case 'registered':
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case 'scripts': // Back compat.
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if ( isset( $this->registered[ $handle ] ) ) {
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return $this->registered[ $handle ];
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}
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return false;
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case 'enqueued':
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case 'queue': // Back compat.
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if ( in_array( $handle, $this->queue, true ) ) {
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return true;
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}
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return $this->recurse_deps( $this->queue, $handle );
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case 'to_do':
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case 'to_print': // Back compat.
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return in_array( $handle, $this->to_do, true );
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case 'done':
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case 'printed': // Back compat.
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return in_array( $handle, $this->done, true );
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}
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return false;
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}
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/**
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* Set item group, unless already in a lower group.
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*
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* @since 2.8.0
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*
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* @param string $handle Name of the item. Should be unique.
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* @param bool $recursion Internal flag that calling function was called recursively.
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* @param int|false $group Group level: level (int), no group (false).
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* @return bool Not already in the group or a lower group.
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*/
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public function set_group( $handle, $recursion, $group ) {
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$group = (int) $group;
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if ( isset( $this->groups[ $handle ] ) && $this->groups[ $handle ] <= $group ) {
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return false;
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}
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$this->groups[ $handle ] = $group;
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return true;
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}
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}
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