diff -r 000000000000 -r d970ebf37754 wp/wp-includes/class.wp-dependencies.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/class.wp-dependencies.php	Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,481 @@
+<?php
+/**
+ * BackPress Scripts enqueue
+ *
+ * Classes were refactored from the WP_Scripts and WordPress script enqueue API.
+ *
+ * @since BackPress r74
+ *
+ * @package BackPress
+ * @uses _WP_Dependency
+ * @since r74
+ */
+class WP_Dependencies {
+	/**
+	 * An array of registered handle objects.
+	 *
+	 * @access public
+	 * @since 2.6.8
+	 * @var array
+	 */
+	var $registered = array();
+
+	/**
+	 * An array of queued _WP_Dependency handle objects.
+	 *
+	 * @access public
+	 * @since 2.6.8
+	 * @var array
+	 */
+	var $queue = array();
+
+	/**
+	 * An array of _WP_Dependency handle objects to queue.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var array
+	 */
+	var $to_do = array();
+
+	/**
+	 * An array of _WP_Dependency handle objects already queued.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var array
+	 */
+	var $done = array();
+
+	/**
+	 * An array of additional arguments passed when a handle is registered.
+	 *
+	 * Arguments are appended to the item query string.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var array
+	 */
+	var $args = array();
+
+	/**
+	 * An array of handle groups to enqueue.
+	 *
+	 * @access public
+	 * @since 2.8.0
+	 * @var array
+	 */
+	var $groups = array();
+
+	/**
+	 * A handle group to enqueue.
+	 *
+	 * @access public
+	 * @since 2.8.0
+	 * @var int
+	 */
+	var $group = 0;
+
+	/**
+	 * Process the items and dependencies.
+	 *
+	 * Processes the items passed to it or the queue, and their dependencies.
+	 *
+	 * @access public
+	 * @since 2.1.0
+	 *
+	 * @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]) ) {
+
+				/**
+				 * A single item may alias a set of items, by having dependencies,
+				 * but no source. Queuing the item queues the dependencies.
+				 *
+				 * Example: The extending class WP_Scripts is used to register 'scriptaculous' as a set of registered handles:
+				 *   <code>add( 'scriptaculous', false, array( 'scriptaculous-dragdrop', 'scriptaculous-slider', 'scriptaculous-controls' ) );</code>
+				 *
+				 * The src property is false.
+				**/
+				if ( ! $this->registered[$handle]->src ) {
+					$this->done[] = $handle;
+					continue;
+				}
+
+				/**
+				 * 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;
+	}
+
+	/**
+	 * Process a dependency.
+	 *
+	 * @access public
+	 * @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]);
+	}
+
+	/**
+	 * Determine dependencies.
+	 *
+	 * Recursively builds an array of items to process taking
+	 * dependencies into account. Does NOT catch infinite loops.
+	 *
+	 * @access public
+	 * @since 2.1.0
+	 *
+	 * @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 mixed $group     Group level: (int) level, (false) no groups.
+	 * @return bool True on success, false on failure.
+	 */
+	public function all_deps( $handles, $recursion = false, $group = false ) {
+		if ( !$handles = (array) $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 );
+
+			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, $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.
+	 *
+	 * @access public
+	 * @since 2.1.0
+	 *
+	 * @param string $handle Unique item name.
+	 * @param string $src    The item url.
+	 * @param array  $deps   Optional. An array of item handle strings on which this item depends.
+	 * @param string $ver    Optional. Version (used for cache busting).
+	 * @param mixed  $args   Optional. Custom property of the item. NOT the class property $args. Examples: $media, $in_footer.
+	 * @return bool 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.
+	 *
+	 * @access public
+	 * @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.
+	 *
+	 * @access public
+	 * @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.
+	 *
+	 * @access public
+	 * @since 2.1.0
+	 *
+	 * @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.
+	 *
+	 * @access public
+	 * @since 2.1.0
+	 *
+	 * @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.
+	 *
+	 * @access public
+	 * @since 2.1.0
+	 *
+	 * @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]]);
+			}
+		}
+	}
+
+	/**
+	 * Query list for an item.
+	 *
+	 * @access public
+	 * @since 2.1.0
+	 *
+	 * @param string $handle Name of the item. Should be unique.
+	 * @param string $list   Property name of list array.
+	 * @return bool 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' :
+				return in_array( $handle, $this->queue );
+
+			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.
+	 *
+	 * @access public
+	 * @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 ( $recursion )
+			$group = min($this->group, $group);
+		else
+			$this->group = $group;
+
+		if ( isset($this->groups[$handle]) && $this->groups[$handle] <= $group )
+			return false;
+
+		$this->groups[$handle] = $group;
+		return true;
+	}
+
+} // WP_Dependencies
+
+/**
+ * Class _WP_Dependency
+ *
+ * Helper class to register a handle and associated data.
+ *
+ * @access private
+ * @since 2.6.0
+ */
+class _WP_Dependency {
+	/**
+	 * The handle name.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var null
+	 */
+	var $handle;
+
+	/**
+	 * The handle source.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var null
+	 */
+	var $src;
+
+	/**
+	 * An array of handle dependencies.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var array
+	 */
+	var $deps = array();
+
+	/**
+	 * The handle version.
+	 *
+	 * Used for cache-busting.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var bool|string
+	 */
+	var $ver = false;
+
+	/**
+	 * Additional arguments for the handle.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var null
+	 */
+	var $args = null;  // Custom property, such as $in_footer or $media.
+
+	/**
+	 * Extra data to supply to the handle.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 * @var array
+	 */
+	var $extra = array();
+
+	/**
+	 * Setup dependencies.
+	 *
+	 * @since 2.6.0
+	 */
+	function __construct() {
+		@list( $this->handle, $this->src, $this->deps, $this->ver, $this->args ) = func_get_args();
+		if ( ! is_array($this->deps) )
+			$this->deps = array();
+	}
+
+	/**
+	 * Add handle data.
+	 *
+	 * @access public
+	 * @since 2.6.0
+	 *
+	 * @param string $name The data key to add.
+	 * @param mixed  $data The data value to add.
+	 * @return bool False if not scalar, true otherwise.
+	 */
+	function add_data( $name, $data ) {
+		if ( !is_scalar($name) )
+			return false;
+		$this->extra[$name] = $data;
+		return true;
+	}
+
+} // _WP_Dependencies