WordPress/wp-includes/class.wp-dependencies.php

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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
*/
Code Modernization: Add `AllowDynamicProperties` attribute to all (parent) classes. Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0. There are a number of ways to mitigate this: * If it is an accidental typo for a declared property: fix the typo. * For known properties: declare them on the class. * For unknown properties: add the magic `__get()`, `__set()`, et al. methods to the class or let the class extend `stdClass` which has highly optimized versions of these magic methods built in. * For unknown ''use'' of dynamic properties, the `#[AllowDynamicProperties]` attribute can be added to the class. The attribute will automatically be inherited by child classes. Trac ticket #56034 is open to investigate and handle the third and fourth type of situations, however it has become clear this will need more time and will not be ready in time for WP 6.1. To reduce “noise” in the meantime, both in the error logs of WP users moving onto PHP 8.2, in the test run logs of WP itself, in test runs of plugins and themes, as well as to prevent duplicate tickets from being opened for the same issue, this commit adds the `#[AllowDynamicProperties]` attribute to all “parent” classes in WP. The logic used for this commit is as follows: * If a class already has the attribute: no action needed. * If a class does not `extend`: add the attribute. * If a class does `extend`: - If it extends `stdClass`: no action needed (as `stdClass` supports dynamic properties). - If it extends a PHP native class: add the attribute. - If it extends a class from one of WP's external dependencies: add the attribute. * In all other cases: no action — the attribute should not be needed as child classes inherit from the parent. Whether or not a class contains magic methods has not been taken into account, as a review of the currently existing magic methods has shown that those are generally not sturdy enough and often even set dynamic properties (which they should not). See the [https://www.youtube.com/watch?v=vDZWepDQQVE live stream from August 16, 2022] for more details. This commit only affects classes in the `src` directory of WordPress core. * Tests should not get this attribute, but should be fixed to not use dynamic properties instead. Patches for this are already being committed under ticket #56033. * While a number bundled themes (2014, 2019, 2020, 2021) contain classes, they are not a part of this commit and may be updated separately. Reference: [https://wiki.php.net/rfc/deprecate_dynamic_properties PHP RFC: Deprecate dynamic properties]. Follow-up to [53922]. Props jrf, hellofromTonya, markjaquith, peterwilsoncc, costdev, knutsp, aristath. See #56513, #56034. Built from https://develop.svn.wordpress.org/trunk@54133 git-svn-id: http://core.svn.wordpress.org/trunk@53692 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-09-12 17:47:14 +02:00
#[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|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 );
// 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;
}
}