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0860bb2771
Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs. See #41452. Built from https://develop.svn.wordpress.org/trunk@41162 git-svn-id: http://core.svn.wordpress.org/trunk@41002 1a063a9b-81f0-0310-95a4-ce76da25c4cd
397 lines
11 KiB
PHP
397 lines
11 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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class WP_Dependencies {
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/**
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* An array of registered handle objects.
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*
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* @since 2.6.8
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* @var array
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*/
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public $registered = array();
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/**
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* An array of queued _WP_Dependency handle objects.
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*
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* @since 2.6.8
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* @var array
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*/
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public $queue = array();
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/**
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* An array of _WP_Dependency handle objects to queue.
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*
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* @since 2.6.0
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* @var array
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*/
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public $to_do = array();
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/**
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* An array of _WP_Dependency handle objects already queued.
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*
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* @since 2.6.0
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* @var array
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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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* @var array
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*/
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public $args = array();
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/**
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* An array of handle groups to enqueue.
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*
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* @since 2.8.0
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* @var array
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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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* @deprecated 4.5.0
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* @var int
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*/
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public $group = 0;
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/**
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* Processes the items and dependencies.
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*
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* Processes the items passed to it or the queue, and their dependencies.
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*
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* @since 2.6.0
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* @since 2.8.0 Added the `$group` parameter.
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*
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* @param mixed $handles Optional. Items to be processed: Process queue (false), process item (string), process items (array of strings).
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* @param mixed $group Group level: level (int), no groups (false).
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* @return array 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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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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*
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* @param string $handle Name of the item. Should be unique.
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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( $handle ) {
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return isset($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 mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
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* @param bool $recursion Internal flag that function is calling itself.
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* @param int|false $group Group level: (int) level, (false) no groups.
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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, $group = false ) {
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if ( !$handles = (array) $handles )
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return false;
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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, $this->done, true) ) // Already done
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continue;
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$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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$keep_going = true;
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if ( !isset($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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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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if ( $queued ) // Already grabbed it and its dependencies.
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continue;
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if ( isset($handle_parts[1]) )
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$this->args[$handle] = $handle_parts[1];
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$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 $src Full URL of the item, or path of the item relative to the WordPress root directory.
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* @param array $deps Optional. An array of registered item handles this item depends on. Default empty array.
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* @param string|bool|null $ver Optional. String specifying item version number, if it has one, which is added to the URL
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* as a query string for cache busting purposes. If version is set to false, a version
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* number is automatically added 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. 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[$handle]) )
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return false;
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$this->registered[$handle] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );
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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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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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if ( !isset( $this->registered[$handle]->extra[$key] ) )
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return false;
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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 mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
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* @return void
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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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* 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 mixed $handles Item handle and argument (string) or item handles and arguments (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], $this->queue) && isset($this->registered[$handle[0]]) ) {
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$this->queue[] = $handle[0];
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if ( isset($handle[1]) )
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$this->args[$handle[0]] = $handle[1];
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}
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}
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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 mixed $handles Item handle and argument (string) or item handles and arguments (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);
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if ( false !== $key ) {
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unset($this->queue[$key]);
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unset($this->args[$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 $handle
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*
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* @since 4.0.0
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*
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* @param array $queue An array of queued _WP_Dependency handle objects.
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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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foreach ( $queue as $queued ) {
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if ( ! isset( $this->registered[ $queued ] ) ) {
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continue;
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}
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if ( in_array( $handle, $this->registered[ $queued ]->deps ) ) {
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return true;
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} elseif ( $this->recurse_deps( $this->registered[ $queued ]->deps, $handle ) ) {
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return true;
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}
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}
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return false;
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}
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/**
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* Query 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 $list Property name of list array.
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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, $list = 'registered' ) {
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switch ( $list ) {
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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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return false;
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case 'enqueued' :
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case 'queue' :
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if ( in_array( $handle, $this->queue ) ) {
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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 );
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case 'done' :
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case 'printed': // back compat
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return in_array( $handle, $this->done );
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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 mixed $group Group level.
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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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