Fix #13103. Add .finish() method. Cherry picked from b6abb31d.

src/effects.js

@@ -72,6 +72,7 @@ function createTweens( animation, props ) {
 
 function Animation( elem, properties, options ) {
 	var result,
+		stopped,
 		index = 0,
 		length = animationPrefilters.length,
 		deferred = jQuery.Deferred().always( function() {
@@ -79,6 +80,9 @@ function Animation( elem, properties, options ) {
 			delete tick.elem;
 		}),
 		tick = function() {
+			if ( stopped ) {
+				return false;
+			}
 			var currentTime = fxNow || createFxNow(),
 				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
 				// archaic crash bug won't allow us to use 1 - ( 0.5 || 0 ) (#12497)
@@ -120,7 +124,10 @@ function Animation( elem, properties, options ) {
 					// if we are going to the end, we want to run all the tweens
 					// otherwise we skip this part
 					length = gotoEnd ? animation.tweens.length : 0;
-
+				if ( stopped ) {
+					return this;
+				}
+				stopped = true;
 				for ( ; index < length ; index++ ) {
 					animation.tweens[ index ].run( 1 );
 				}
@@ -477,12 +484,15 @@ jQuery.fn.extend({
 			doAnimation = function() {
 				// Operate on a copy of prop so per-property easing won't be lost
 				var anim = Animation( this, jQuery.extend( {}, prop ), optall );
-
-				// Empty animations resolve immediately
-				if ( empty ) {
+				doAnimation.finish = function() {
+					anim.stop( true );
+				};
+				// Empty animations, or finishing resolves immediately
+				if ( empty || jQuery._data( this, "finish" ) ) {
 					anim.stop( true );
 				}
 			};
+			doAnimation.finish = doAnimation;
 
 		return empty || optall.queue === false ?
 			this.each( doAnimation ) :
@@ -537,6 +547,47 @@ jQuery.fn.extend({
 				jQuery.dequeue( this, type );
 			}
 		});
+	},
+	finish: function( type ) {
+		if ( type !== false ) {
+			type = type || "fx";
+		}
+		return this.each(function() {
+			var index,
+				data = jQuery._data( this ),
+				queue = data[ type + "queue" ],
+				hooks = data[ type + "queueHooks" ],
+				timers = jQuery.timers,
+				length = queue ? queue.length : 0;
+
+			// enable finishing flag on private data
+			data.finish = true;
+
+			// empty the queue first
+			jQuery.queue( this, type, [] );
+
+			if ( hooks && hooks.cur && hooks.cur.finish ) {
+				hooks.cur.finish.call( this );
+			}
+
+			// look for any active animations, and finish them
+			for ( index = timers.length; index--; ) {
+				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
+					timers[ index ].anim.stop( true );
+					timers.splice( index, 1 );
+				}
+			}
+
+			// look for any animations in the old queue and finish them
+			for ( index = 0; index < length; index++ ) {
+				if ( queue[ index ] && queue[ index ].finish ) {
+					queue[ index ].finish.call( this );
+				}
+			}
+
+			// turn off finishing flag
+			delete data.finish;
+		});
 	}
 });
 

src/queue.js

@@ -35,6 +35,7 @@ jQuery.extend({
 			startLength--;
 		}
 
+		hooks.cur = fn;
 		if ( fn ) {
 
 			// Add a progress sentinel to prevent the fx queue from being

test/unit/effects.js

@@ -1904,4 +1904,53 @@ test( "jQuery.fx.start & jQuery.fx.stop hook points", function() {
 	jQuery.fx.stop = oldStop;
 });
 
+test( ".finish() completes all queued animations", function() {
+	var animations = {
+			top: 100,
+			left: 100,
+			height: 100,
+			width: 100
+		},
+		div = jQuery("<div>");
+
+	expect( 11 );
+
+	jQuery.each( animations, function( prop, value ) {
+		var anim = {};
+		anim[ prop ] = value;
+		// the delay shouldn't matter at all!
+		div.css( prop, 1 ).animate( anim, function() {
+			ok( true, "Called animation callback" );
+		}).delay( 100 );
+	});
+	equal( div.queue().length, 8, "8 animations in the queue" );
+	div.finish();
+	jQuery.each( animations, function( prop, value ) {
+		equal( parseFloat( div.css( prop ) ), value, prop + " finished at correct value" );
+	});
+	equal( div.queue().length, 0, "empty queue when done" );
+	equal( div.is(":animated"), false, ":animated doesn't match" );
+
+	// cleanup
+	div.remove();
+	// leaves a "shadow timer" which does nothing around, need to force a tick
+	jQuery.fx.tick();
+});
+
+test( ".finish() calls finish of custom queue functions", function() {
+	function queueTester( next ) {
+
+	}
+	var div = jQuery( "<div>" );
+
+	expect( 3 );
+	queueTester.finish = function() {
+		ok( true, "Finish called on custom queue function" );
+	};
+
+	div.queue( queueTester ).queue( queueTester ).queue( queueTester ).finish();
+
+	div.remove();
+});
+
 } // if ( jQuery.fx )