--- /dev/null
+<?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;
+ }
+}
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff