WP Merge with revision 8075

git-svn-id: http://svn.automattic.com/wordpress-mu/trunk@1328 7be80a69-a1ef-0310-a953-fb0f7c49ff36

1 files changed, 193 insertions, 0 deletions

diff --git a/wp-includes/class.wp-dependencies.php b/wp-includes/class.wp-dependencies.php
new file mode 100644
index 0000000..1f7bb8d
--- /dev/null
+++ b/wp-includes/class.wp-dependencies.php
@@ -0,0 +1,193 @@
+<?php
+
+class WP_Dependencies {
+	var $registered = array();
+	var $queue = array();
+	var $to_do = array();
+	var $done = array();
+	var $args = array();
+
+	function WP_Dependencies() {
+		$args = func_get_args();
+		call_user_func_array( array(&$this, '__construct'), $args );
+	}
+
+	function __construct() {}
+
+	/**
+	 * Do the dependencies
+	 *
+	 * Process the items passed to it or the queue.  Processes all dependencies.
+	 *
+	 * @param mixed handles (optional) items to be processed.  (void) processes queue, (string) process that item, (array of strings) process those items
+	 * @return array Items that have been processed
+	 */
+	function do_items( $handles = false ) {
+		// Print the queue if nothing is passed.  If a string is passed, print that script.  If an array is passed, print those scripts.
+		$handles = false === $handles ? $this->queue : (array) $handles;
+		$this->all_deps( $handles );
+
+		foreach( $this->to_do as $handle ) {
+			if ( !in_array($handle, $this->done) && isset($this->registered[$handle]) ) {
+				if ( $this->registered[$handle]->src ) { // Else it defines a group.
+					$this->do_item( $handle );
+				}
+				$this->done[] = $handle;
+			}
+		}
+
+		$this->to_do = array();
+		return $this->done;
+	}
+
+	function do_item( $handle ) {
+		return isset($this->registered[$handle]);
+	}
+
+	/**
+	 * Determines dependencies
+	 *
+	 * Recursively builds array of items to process taking dependencies into account.  Does NOT catch infinite loops.
+	 *
+
+	 * @param mixed handles Accepts (string) dep name or (array of strings) dep names
+	 * @param bool recursion Used internally when function calls itself
+	 */
+	function all_deps( $handles, $recursion = false ) {
+		if ( !$handles = (array) $handles )
+			return false;
+
+		foreach ( $handles as $handle ) {
+			$handle = explode('?', $handle);
+			if ( isset($handle[1]) )
+				$this->args[$handle[0]] = $handle[1];
+			$handle = $handle[0];
+
+			if ( isset($this->to_do[$handle]) ) // Already grobbed it and its deps
+				continue;
+
+			$keep_going = true;
+			if ( !isset($this->registered[$handle]) )
+				$keep_going = false; // Script doesn't exist
+			elseif ( $this->registered[$handle]->deps && array_diff($this->registered[$handle]->deps, array_keys($this->registered)) )
+				$keep_going = false; // Script requires deps which don't exist (not a necessary check.  efficiency?)
+			elseif ( $this->registered[$handle]->deps && !$this->all_deps( $this->registered[$handle]->deps, true ) )
+				$keep_going = false; // Script requires deps which don't exist
+
+			if ( !$keep_going ) { // Either script or its deps don't exist.
+				if ( $recursion )
+					return false; // Abort this branch.
+				else
+					continue; // We're at the top level.  Move on to the next one.
+			}					
+
+			$this->to_do[$handle] = true;
+		}
+
+		if ( !$recursion ) // at the end
+			$this->to_do = array_keys( $this->to_do );
+		return true;
+	}
+
+	/**
+	 * Adds item
+	 *
+	 * Adds the item only if no item of that name already exists
+	 *
+	 * @param string handle Script name
+	 * @param string src Script url
+	 * @param array deps (optional) Array of script names on which this script depends
+	 * @param string ver (optional) Script version (used for cache busting)
+	 * @return array Hierarchical array of dependencies
+	 */
+	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;
+	}
+
+	/**
+	 * Adds extra data
+	 *
+	 * Adds data only if script has already been added
+	 *
+	 * @param string handle Script name
+	 * @param string data_name Name of object in which to store extra data
+	 * @param array data Array of extra data
+	 * @return bool success
+	 */
+	function add_data( $handle, $data_name, $data ) {
+		if ( !isset($this->registered[$handle]) )
+			return false;
+		return $this->registered[$handle]->add_data( $data_name, $data );
+	}
+
+	function remove( $handles ) {
+		foreach ( (array) $handles as $handle )
+			unset($this->registered[$handle]);
+	}
+
+	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];
+			}
+		}
+	}
+
+	function dequeue( $handles ) {
+		foreach ( (array) $handles as $handle )
+			unset( $this->queue[$handle] );
+	}
+
+	function query( $handle, $list = 'registered' ) { // registered, queue, done, to_do
+		switch ( $list ) :
+		case 'registered':
+		case 'scripts': // back compat
+			if ( isset($this->registered[$handle]) )
+				return $this->registered[$handle];
+			break;
+		case 'to_print': // back compat
+		case 'printed': // back compat
+			if ( 'to_print' == $list )
+				$list = 'to_do';
+			else
+				$list = 'printed';
+		default:
+			if ( in_array($handle, $this->$list) )
+				return true;
+			break;
+		endswitch;
+		return false;
+	}
+
+}
+
+class _WP_Dependency {
+	var $handle;
+	var $src;
+	var $deps = array();
+	var $ver = false;
+	var $args = null;
+
+	var $extra = array();
+
+	function _WP_Dependency() {
+		@list($this->handle, $this->src, $this->deps, $this->ver, $this->args) = func_get_args();
+		if ( !is_array($this->deps) )
+			$this->deps = array();
+		if ( !$this->ver )
+			$this->ver = false;
+	}
+
+	function add_data( $name, $data ) {
+		if ( !is_scalar($name) )
+			return false;
+		$this->extra[$name] = $data;
+		return true;
+	}
+}