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authorCharles <sircharlesaze@gmail.com>2020-01-07 13:06:14 +0100
committerCharles <sircharlesaze@gmail.com>2020-01-07 13:06:14 +0100
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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
+ */
+class WP_Dependencies {
+ /**
+ * An array of registered handle objects.
+ *
+ * @since 2.6.8
+ * @var array
+ */
+ public $registered = array();
+
+ /**
+ * An array of queued _WP_Dependency handle objects.
+ *
+ * @since 2.6.8
+ * @var array
+ */
+ public $queue = array();
+
+ /**
+ * An array of _WP_Dependency handle objects to queue.
+ *
+ * @since 2.6.0
+ * @var array
+ */
+ public $to_do = array();
+
+ /**
+ * An array of _WP_Dependency handle objects already queued.
+ *
+ * @since 2.6.0
+ * @var array
+ */
+ public $done = array();
+
+ /**
+ * An array of additional arguments passed when a handle is registered.
+ *
+ * Arguments are appended to the item query string.
+ *
+ * @since 2.6.0
+ * @var array
+ */
+ public $args = array();
+
+ /**
+ * An array of handle groups to enqueue.
+ *
+ * @since 2.8.0
+ * @var array
+ */
+ public $groups = array();
+
+ /**
+ * A handle group to enqueue.
+ *
+ * @since 2.8.0
+ * @deprecated 4.5.0
+ * @var int
+ */
+ public $group = 0;
+
+ /**
+ * Processes the items and dependencies.
+ *
+ * Processes the items passed to it or the queue, and their dependencies.
+ *
+ * @since 2.6.0
+ * @since 2.8.0 Added the `$group` parameter.
+ *
+ * @param mixed $handles Optional. Items to be processed: Process queue (false), process item (string), process items (array of strings).
+ * @param mixed $group Group level: level (int), no groups (false).
+ * @return array 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
+ *
+ * @param string $handle Name of the item. Should be unique.
+ * @return bool True on success, false if not set.
+ */
+ public function do_item( $handle ) {
+ 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 mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
+ * @param bool $recursion Internal flag that function is calling itself.
+ * @param int|false $group Group level: (int) level, (false) no groups.
+ * @return bool True on success, false on failure.
+ */
+ public function all_deps( $handles, $recursion = false, $group = false ) {
+ $handles = (array) $handles;
+ if ( ! $handles ) {
+ return false;
+ }
+
+ foreach ( $handles as $handle ) {
+ $handle_parts = explode( '?', $handle );
+ $handle = $handle_parts[0];
+ $queued = in_array( $handle, $this->to_do, true );
+
+ if ( in_array( $handle, $this->done, true ) ) { // Already done
+ continue;
+ }
+
+ $moved = $this->set_group( $handle, $recursion, $group );
+ $new_group = $this->groups[ $handle ];
+
+ if ( $queued && ! $moved ) { // already queued and in the right group
+ continue;
+ }
+
+ $keep_going = true;
+ if ( ! isset( $this->registered[ $handle ] ) ) {
+ $keep_going = false; // Item doesn't exist.
+ } elseif ( $this->registered[ $handle ]->deps && array_diff( $this->registered[ $handle ]->deps, array_keys( $this->registered ) ) ) {
+ $keep_going = false; // Item requires dependencies that don't exist.
+ } elseif ( $this->registered[ $handle ]->deps && ! $this->all_deps( $this->registered[ $handle ]->deps, true, $new_group ) ) {
+ $keep_going = false; // Item requires dependencies that don't exist.
+ }
+
+ if ( ! $keep_going ) { // Either item or its dependencies don't exist.
+ if ( $recursion ) {
+ return false; // Abort this branch.
+ } else {
+ continue; // We're at the top level. Move on to the next one.
+ }
+ }
+
+ if ( $queued ) { // Already grabbed it and its dependencies.
+ continue;
+ }
+
+ if ( isset( $handle_parts[1] ) ) {
+ $this->args[ $handle ] = $handle_parts[1];
+ }
+
+ $this->to_do[] = $handle;
+ }
+
+ return true;
+ }
+
+ /**
+ * Register an item.
+ *
+ * Registers the item if no item of that name already exists.
+ *
+ * @since 2.1.0
+ * @since 2.6.0 Moved from `WP_Scripts`.
+ *
+ * @param string $handle Name of the item. Should be unique.
+ * @param string|bool $src Full URL of the item, or path of the item relative to the WordPress root directory.
+ * If source is set to false, item is an alias of other items it depends on.
+ * @param string[] $deps Optional. An array of registered item handles this item depends on. Default empty array.
+ * @param string|bool|null $ver Optional. String specifying item version number, if it has one, which is added to the URL
+ * as a query string for cache busting purposes. If version is set to false, a version
+ * number is automatically added equal to current installed WordPress version.
+ * If set to null, no version is added.
+ * @param mixed $args Optional. Custom property of the item. NOT the class property $args. Examples: $media, $in_footer.
+ * @return bool Whether the item has been registered. True on success, false on failure.
+ */
+ public function add( $handle, $src, $deps = array(), $ver = false, $args = null ) {
+ if ( isset( $this->registered[ $handle ] ) ) {
+ return false;
+ }
+ $this->registered[ $handle ] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );
+ return true;
+ }
+
+ /**
+ * Add extra item data.
+ *
+ * Adds data to a registered item.
+ *
+ * @since 2.6.0
+ *
+ * @param string $handle Name of the item. Should be unique.
+ * @param string $key The data key.
+ * @param mixed $value The data value.
+ * @return bool True on success, false on failure.
+ */
+ public function add_data( $handle, $key, $value ) {
+ if ( ! isset( $this->registered[ $handle ] ) ) {
+ return false;
+ }
+
+ return $this->registered[ $handle ]->add_data( $key, $value );
+ }
+
+ /**
+ * Get extra item data.
+ *
+ * Gets data associated with a registered item.
+ *
+ * @since 3.3.0
+ *
+ * @param string $handle Name of the item. Should be unique.
+ * @param string $key The data key.
+ * @return mixed Extra item data (string), false otherwise.
+ */
+ public function get_data( $handle, $key ) {
+ if ( ! isset( $this->registered[ $handle ] ) ) {
+ return false;
+ }
+
+ if ( ! isset( $this->registered[ $handle ]->extra[ $key ] ) ) {
+ return false;
+ }
+
+ return $this->registered[ $handle ]->extra[ $key ];
+ }
+
+ /**
+ * Un-register an item or items.
+ *
+ * @since 2.1.0
+ * @since 2.6.0 Moved from `WP_Scripts`.
+ *
+ * @param mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
+ * @return void
+ */
+ 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 mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
+ */
+ public function enqueue( $handles ) {
+ foreach ( (array) $handles as $handle ) {
+ $handle = explode( '?', $handle );
+ if ( ! in_array( $handle[0], $this->queue ) && isset( $this->registered[ $handle[0] ] ) ) {
+ $this->queue[] = $handle[0];
+ if ( isset( $handle[1] ) ) {
+ $this->args[ $handle[0] ] = $handle[1];
+ }
+ }
+ }
+ }
+
+ /**
+ * Dequeue an item or items.
+ *
+ * Decodes handles and arguments, then dequeues handles
+ * and removes arguments from the class property $args.
+ *
+ * @since 2.1.0
+ * @since 2.6.0 Moved from `WP_Scripts`.
+ *
+ * @param mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
+ */
+ public function dequeue( $handles ) {
+ foreach ( (array) $handles as $handle ) {
+ $handle = explode( '?', $handle );
+ $key = array_search( $handle[0], $this->queue );
+ if ( false !== $key ) {
+ unset( $this->queue[ $key ] );
+ unset( $this->args[ $handle[0] ] );
+ }
+ }
+ }
+
+ /**
+ * Recursively search the passed dependency tree for $handle
+ *
+ * @since 4.0.0
+ *
+ * @param string[] $queue An array of queued _WP_Dependency handles.
+ * @param string $handle Name of the item. Should be unique.
+ * @return bool Whether the handle is found after recursively searching the dependency tree.
+ */
+ protected function recurse_deps( $queue, $handle ) {
+ foreach ( $queue as $queued ) {
+ if ( ! isset( $this->registered[ $queued ] ) ) {
+ continue;
+ }
+
+ if ( in_array( $handle, $this->registered[ $queued ]->deps ) ) {
+ return true;
+ } elseif ( $this->recurse_deps( $this->registered[ $queued ]->deps, $handle ) ) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Query list for an item.
+ *
+ * @since 2.1.0
+ * @since 2.6.0 Moved from `WP_Scripts`.
+ *
+ * @param string $handle Name of the item. Should be unique.
+ * @param string $list Property name of list array.
+ * @return bool|_WP_Dependency Found, or object Item data.
+ */
+ public function query( $handle, $list = 'registered' ) {
+ switch ( $list ) {
+ case 'registered':
+ case 'scripts': // back compat
+ if ( isset( $this->registered[ $handle ] ) ) {
+ return $this->registered[ $handle ];
+ }
+ return false;
+
+ case 'enqueued':
+ case 'queue':
+ if ( in_array( $handle, $this->queue ) ) {
+ return true;
+ }
+ return $this->recurse_deps( $this->queue, $handle );
+
+ case 'to_do':
+ case 'to_print': // back compat
+ return in_array( $handle, $this->to_do );
+
+ case 'done':
+ case 'printed': // back compat
+ return in_array( $handle, $this->done );
+ }
+ 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 mixed $group Group level.
+ * @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;
+ }
+
+}