Trimmed down $.Callbacks and $.Deferred.

src/callbacks.js

@@ -20,9 +20,6 @@ function createFlags( flags ) {
  *	flags:	an optional list of space-separated flags that will change how
  *			the callback list behaves
  *
- *	filter:	an optional function that will be applied to each added callbacks,
- *			what filter returns will then be added provided it is not falsy.
- *
  * By default a callback list will act like an event callback list and can be
  * "fired" multiple times.
  *
@@ -34,26 +31,12 @@ function createFlags( flags ) {
  *					after the list has been fired right away with the latest "memorized"
  *					values (like a Deferred)
  *
- *	queue:			only first callback in the list is called each time the list is fired
- *					(cannot be used in conjunction with memory)
- *
  *	unique:			will ensure a callback can only be added once (no duplicate in the list)
  *
- *	relocate:		like "unique" but will relocate the callback at the end of the list
- *
  *	stopOnFalse:	interrupt callings when a callback returns false
  *
- *	addAfterFire:	if callbacks are added while firing, then they are not executed until after
- *					the next call to fire/fireWith
- *
  */
-jQuery.Callbacks = function( flags, filter ) {
-
-	// flags are optional
-	if ( typeof flags !== "string" ) {
-		filter = flags;
-		flags = undefined;
-	}
+jQuery.Callbacks = function( flags ) {
 
 	// Convert flags from String-formatted to Object-formatted
 	// (we check in cache first)
@@ -87,18 +70,9 @@ jQuery.Callbacks = function( flags, filter ) {
 					// Inspect recursively
 					add( elem );
 				} else if ( type === "function" ) {
-					// If we have to relocate, we remove the callback
-					// if it already exists
-					if ( flags.relocate ) {
-						self.remove( elem );
-					// Skip if we're in unique mode and callback is already in
-					} else if ( flags.unique && self.has( elem ) ) {
-						continue;
-					}
-					// Get the filtered function if needs be
-					actual = filter ? filter( elem ) : elem;
-					if ( actual ) {
-						list.push( [ elem, actual ] );
+					// Add if not in unique mode and callback is not in
+					if ( !flags.unique || !self.has( elem ) ) {
+						list.push( elem );
 					}
 				}
 			}
@@ -112,12 +86,9 @@ jQuery.Callbacks = function( flags, filter ) {
 			firingStart = 0;
 			firingLength = list.length;
 			for ( ; list && firingIndex < firingLength; firingIndex++ ) {
-				if ( list[ firingIndex ][ 1 ].apply( context, args ) === false && flags.stopOnFalse ) {
+				if ( list[ firingIndex ].apply( context, args ) === false && flags.stopOnFalse ) {
 					memory = true; // Mark as halted
 					break;
-				} else if ( flags.queue ) {
-					list.splice( firingIndex, 1 );
-					break;
 				}
 			}
 			firing = false;
@@ -144,9 +115,7 @@ jQuery.Callbacks = function( flags, filter ) {
 					// Do we need to add the callbacks to the
 					// current firing batch?
 					if ( firing ) {
-						if ( !flags.addAfterFire ) {
-							firingLength = list.length;
-						}
+						firingLength = list.length;
 					// With memory, if we're not firing then
 					// we should call right away, unless previous
 					// firing was halted (stopOnFalse)
@@ -165,7 +134,7 @@ jQuery.Callbacks = function( flags, filter ) {
 						argLength = args.length;
 					for ( ; argIndex < argLength ; argIndex++ ) {
 						for ( var i = 0; i < list.length; i++ ) {
-							if ( args[ argIndex ] === list[ i ][ 0 ] ) {
+							if ( args[ argIndex ] === list[ i ] ) {
 								// Handle firingIndex and firingLength
 								if ( firing ) {
 									if ( i <= firingLength ) {
@@ -179,7 +148,7 @@ jQuery.Callbacks = function( flags, filter ) {
 								list.splice( i--, 1 );
 								// If we have some unicity property then
 								// we only need to do this once
-								if ( flags.unique || flags.relocate ) {
+								if ( flags.unique ) {
 									break;
 								}
 							}
@@ -194,7 +163,7 @@ jQuery.Callbacks = function( flags, filter ) {
 					var i = 0,
 						length = list.length;
 					for ( ; i < length; i++ ) {
-						if ( fn === list[ i ][ 0 ] ) {
+						if ( fn === list[ i ] ) {
 							return true;
 						}
 					}

src/deferred.js

 (function( jQuery ) {
 
-var // Promise methods
-	promiseMethods = "done removeDone fail removeFail progress removeProgress isResolved isRejected promise then always pipe".split( " " ),
-	// Static reference to slice
+var // Static reference to slice
 	sliceDeferred = [].slice;
 
 jQuery.extend({
@@ -11,31 +9,28 @@ jQuery.extend({
 		var doneList = jQuery.Callbacks( "once memory" ),
 			failList = jQuery.Callbacks( "once memory" ),
 			progressList = jQuery.Callbacks( "memory" ),
-			promise,
-			deferred = {
-				// Copy existing methods from lists
+			lists = {
+				resolve: doneList,
+				reject: failList,
+				notify: progressList
+			},
+			promise = {
 				done: doneList.add,
-				removeDone: doneList.remove,
 				fail: failList.add,
-				removeFail: failList.remove,
 				progress: progressList.add,
-				removeProgress: progressList.remove,
-				resolve: doneList.fire,
-				resolveWith: doneList.fireWith,
-				reject: failList.fire,
-				rejectWith: failList.fireWith,
-				notify: progressList.fire,
-				notifyWith: progressList.fireWith,
+
 				isResolved: doneList.fired,
 				isRejected: failList.fired,
+				isProgressing: function() {
+					return !progressList.locked();
+				},
 
-				// Create Deferred-specific methods
 				then: function( doneCallbacks, failCallbacks, progressCallbacks ) {
 					deferred.done( doneCallbacks ).fail( failCallbacks ).progress( progressCallbacks );
 					return this;
 				},
 				always: function() {
-					return deferred.done.apply( deferred, arguments ).fail.apply( this, arguments );
+					return deferred.done.apply( deferred, arguments ).fail.apply( deferred, arguments );
 				},
 				pipe: function( fnDone, fnFail, fnProgress ) {
 					return jQuery.Deferred(function( newDefer ) {
@@ -66,18 +61,22 @@ jQuery.extend({
 				// If obj is provided, the promise aspect is added to the object
 				promise: function( obj ) {
 					if ( obj == null ) {
-						if ( promise ) {
-							return promise;
+						obj = promise;
+					} else {
+						for( var key in promise ) {
+							obj[ key ] = promise[ key ];
 						}
-						promise = obj = {};
-					}
-					var i = promiseMethods.length;
-					while( i-- ) {
-						obj[ promiseMethods[i] ] = deferred[ promiseMethods[i] ];
 					}
 					return obj;
 				}
-			};
+			},
+			deferred = promise.promise({}),
+			key;
+
+		for ( key in lists ) {
+			deferred[ key ] = lists[ key ].fire;
+			deferred[ key + "With" ] = lists[ key ].fireWith;
+		}
 
 		// Handle lists exclusiveness
 		deferred.done( failList.disable, progressList.lock )

test/unit/callbacks.js

@@ -16,25 +16,13 @@ var output,
 		"once":						"XABC 	X 		X 			X 	X 	X	XABA	X",
 		"memory":					"XABC 	XABC 	XABCABCCC 	XA 	XBB	XB	XABA	XC",
 		"unique":					"XABC 	X		XABCA		X	XBB	X	XAB		X",
-		"relocate":					"XABC 	X		XAABC		X	XBB X	XBA		X",
 		"stopOnFalse":				"XABC 	X		XABCABCC	X	XBB	X	XA		X",
-		"addAfterFire":				"XAB	X		XABCAB		X	XBB	X	XABA	X",
-		"queue":					"XA		X		XB			X	XB	X	XA		X",
 		"once memory":				"XABC 	XABC	X			XA	X	XA	XABA	XC",
 		"once unique":				"XABC 	X		X			X	X	X	XAB		X",
-		"once relocate":			"XABC 	X		X			X	X	X	XBA		X",
 		"once stopOnFalse":			"XABC 	X		X			X	X	X	XA		X",
-		"once addAfterFire":		"XAB	X		X			X	X	X	XABA	X",
 		"memory unique":			"XABC 	XA		XABCA		XA	XBB	XB	XAB		XC",
-		"memory relocate":			"XABC 	XB		XAABC		XA	XBB	XB	XBA		XC",
 		"memory stopOnFalse":		"XABC 	XABC	XABCABCCC	XA	XBB	XB	XA		X",
-		"memory addAfterFire":		"XAB	XAB		XABCABC		XA	XBB	XB	XABA	XC",
-		"unique relocate":			"XABC 	X		XAABC		X	XBB	X	XBA		X",
-		"unique stopOnFalse":		"XABC 	X		XABCA		X	XBB	X	XA		X",
-		"unique addAfterFire":		"XAB	X		XABCA		X	XBB	X	XAB		X",
-		"relocate stopOnFalse":		"XABC 	X		XAABC		X	XBB	X	X		X",
-		"relocate addAfterFire":	"XAB	X		XAA			X	XBB	X	XBA		X",
-		"stopOnFalse addAfterFire":	"XAB	X		XABCAB		X	XBB	X	XA		X"
+		"unique stopOnFalse":		"XABC 	X		XABCA		X	XBB	X	XA		X"
 	},
 	filters = {
 		"no filter": undefined,