Merge branch 'effectsCleanup' of https://github.com/louisremi/jquery into louisremi-effectsCleanup

src/effects.js

 (function( jQuery ) {
 
 var elemdisplay = {},
-	iframe = null, 
-	iframeDoc = null,
+	iframe, iframeDoc,
 	rfxtypes = /^(?:toggle|show|hide)$/,
 	rfxnum = /^([+\-]=)?([\d+.\-]+)([a-z%]*)$/i,
 	timerId,
@@ -19,15 +18,6 @@ var elemdisplay = {},
 	    window.mozRequestAnimationFrame ||
 	    window.oRequestAnimationFrame;
 
-function clearFxNow() {
-	fxNow = undefined;
-}
-
-function createFxNow() {
-	setTimeout( clearFxNow, 0 );
-	return ( fxNow = jQuery.now() );
-}
-
 jQuery.fn.extend({
 	show: function( speed, easing, callback ) {
 		var elem, display;
@@ -134,25 +124,32 @@ jQuery.fn.extend({
 				jQuery._mark( this );
 			}
 
-			var opt = jQuery.extend({}, optall), p,
+			var opt = jQuery.extend({}, optall),
 				isElement = this.nodeType === 1,
 				hidden = isElement && jQuery(this).is(":hidden"),
-				self = this;
+				name, val, p,
+				display, e,
+				parts, start, end, unit;
+
+			// will store per property easing and be used to determine when an animation is complete
+			opt.animatedProperties = {};
 
 			for ( p in prop ) {
-				var name = jQuery.camelCase( p );
 
+				// property name normalization
+				name = jQuery.camelCase( p );
 				if ( p !== name ) {
 					prop[ name ] = prop[ p ];
 					delete prop[ p ];
-					p = name;
 				}
 
-				if ( prop[p] === "hide" && hidden || prop[p] === "show" && !hidden ) {
+				val = prop[name];
+
+				if ( val === "hide" && hidden || val === "show" && !hidden ) {
 					return opt.complete.call(this);
 				}
 
-				if ( isElement && ( p === "height" || p === "width" ) ) {
+				if ( isElement && ( name === "height" || name === "width" ) ) {
 					// Make sure that nothing sneaks out
 					// Record all 3 overflow attributes because IE does not
 					// change the overflow attribute when overflowX and
@@ -183,38 +180,37 @@ jQuery.fn.extend({
 					}
 				}
 
-				if ( jQuery.isArray( prop[p] ) ) {
-					// Create (if needed) and add to specialEasing
-					(opt.specialEasing = opt.specialEasing || {})[p] = prop[p][1];
-					prop[p] = prop[p][0];
-				}
+				// easing resolution: per property > opt.specialEasing > opt.easing > 'swing' (default)
+				opt.animatedProperties[name] = jQuery.isArray( val ) ?
+					val[1]:
+					opt.specialEasing && opt.specialEasing[name] || opt.easing || 'swing';
 			}
 
 			if ( opt.overflow != null ) {
 				this.style.overflow = "hidden";
 			}
 
-			opt.curAnim = jQuery.extend({}, prop);
+			for ( p in prop ) {
+				e = new jQuery.fx( this, opt, p );
 
-			jQuery.each( prop, function( name, val ) {
-				var e = new jQuery.fx( self, opt, name );
+				val = prop[p];
 
 				if ( rfxtypes.test(val) ) {
-					e[ val === "toggle" ? hidden ? "show" : "hide" : val ]( prop );
+					e[ val === "toggle" ? hidden ? "show" : "hide" : val ]();
 
 				} else {
-					var parts = rfxnum.exec(val),
-						start = e.cur();
+					parts = rfxnum.exec(val);
+					start = e.cur();
 
 					if ( parts ) {
-						var end = parseFloat( parts[2] ),
-							unit = parts[3] || ( jQuery.cssNumber[ name ] ? "" : "px" );
+						end = parseFloat( parts[2] );
+						unit = parts[3] || ( jQuery.cssNumber[ name ] ? "" : "px" );
 
 						// We need to compute starting value
 						if ( unit !== "px" ) {
-							jQuery.style( self, name, (end || 1) + unit);
+							jQuery.style( this, p, (end || 1) + unit);
 							start = ((end || 1) / e.cur()) * start;
-							jQuery.style( self, name, start + unit);
+							jQuery.style( this, p, start + unit);
 						}
 
 						// If a +=/-= token was provided, we're doing a relative animation
@@ -228,7 +224,7 @@ jQuery.fn.extend({
 						e.custom( start, val, "" );
 					}
 				}
-			});
+			}
 
 			// For JS strict compliance
 			return true;
@@ -236,19 +232,19 @@ jQuery.fn.extend({
 	},
 
 	stop: function( clearQueue, gotoEnd ) {
-		var timers = jQuery.timers;
-
 		if ( clearQueue ) {
 			this.queue([]);
 		}
 
 		this.each(function() {
+			var timers = jQuery.timers,
+				i = timers.length;
 			// clear marker counters if we know they won't be
 			if ( !gotoEnd ) {
 				jQuery._unmark( true, this );
 			}
 			// go in reverse order so anything added to the queue during the loop is ignored
-			for ( var i = timers.length - 1; i >= 0; i-- ) {
+			while ( i-- ) {
 				if ( timers[i].elem === this ) {
 					if (gotoEnd) {
 						// force the next step to be the last
@@ -270,16 +266,6 @@ jQuery.fn.extend({
 
 });
 
-function genFx( type, num ) {
-	var obj = {};
-
-	jQuery.each( fxAttrs.concat.apply([], fxAttrs.slice(0,num)), function() {
-		obj[ this ] = type;
-	});
-
-	return obj;
-}
-
 // Generate shortcuts for custom animations
 jQuery.each({
 	slideDown: genFx("show", 1),
@@ -339,9 +325,7 @@ jQuery.extend({
 		this.elem = elem;
 		this.prop = prop;
 
-		if ( !options.orig ) {
-			options.orig = {};
-		}
+		options.orig = options.orig || {};
 	}
 
 });
@@ -435,26 +419,27 @@ jQuery.fx.prototype = {
 	// Each step of an animation
 	step: function( gotoEnd ) {
 		var t = fxNow || createFxNow(),
-			done = true;
+			done = true,
+			elem = this.elem,
+			options = this.options,
+			i, n;
 
-		if ( gotoEnd || t >= this.options.duration + this.startTime ) {
+		if ( gotoEnd || t >= options.duration + this.startTime ) {
 			this.now = this.end;
 			this.pos = this.state = 1;
 			this.update();
 
-			this.options.curAnim[ this.prop ] = true;
+			options.animatedProperties[ this.prop ] = true;
 
-			for ( var i in this.options.curAnim ) {
-				if ( this.options.curAnim[i] !== true ) {
+			for ( i in options.animatedProperties ) {
+				if ( options.animatedProperties[i] !== true ) {
 					done = false;
 				}
 			}
 
 			if ( done ) {
 				// Reset the overflow
-				if ( this.options.overflow != null && !jQuery.support.shrinkWrapBlocks ) {
-					var elem = this.elem,
-						options = this.options;
+				if ( options.overflow != null && !jQuery.support.shrinkWrapBlocks ) {
 
 					jQuery.each( [ "", "X", "Y" ], function (index, value) {
 						elem.style[ "overflow" + value ] = options.overflow[index];
@@ -462,33 +447,35 @@ jQuery.fx.prototype = {
 				}
 
 				// Hide the element if the "hide" operation was done
-				if ( this.options.hide ) {
-					jQuery(this.elem).hide();
+				if ( options.hide ) {
+					jQuery(elem).hide();
 				}
 
 				// Reset the properties, if the item has been hidden or shown
-				if ( this.options.hide || this.options.show ) {
-					for ( var p in this.options.curAnim ) {
-						jQuery.style( this.elem, p, this.options.orig[p] );
+				if ( options.hide || options.show ) {
+					for ( var p in options.animatedProperties ) {
+						jQuery.style( elem, p, options.orig[p] );
 					}
 				}
 
 				// Execute the complete function
-				this.options.complete.call( this.elem );
+				options.complete.call( elem );
 			}
 
 			return false;
 
 		} else {
-			var n = t - this.startTime;
-			this.state = n / this.options.duration;
-
-			// Perform the easing function, defaults to swing
-			var specialEasing = this.options.specialEasing && this.options.specialEasing[this.prop];
-			var defaultEasing = this.options.easing || (jQuery.easing.swing ? "swing" : "linear");
-			this.pos = jQuery.easing[specialEasing || defaultEasing](this.state, n, 0, 1, this.options.duration);
-			this.now = this.start + ((this.end - this.start) * this.pos);
+			// classical easing cannot be used with an Infinity duration
+			if ( options.duration == Infinity ) {
+				this.now = t;
+			} else {
+				n = t - this.startTime;
 
+				this.state = n / options.duration;
+				// Perform the easing function, defaults to swing
+				this.pos = jQuery.easing[options.animatedProperties[this.prop]](this.state, n, 0, 1, options.duration);
+				this.now = this.start + ((this.end - this.start) * this.pos);
+			}
 			// Perform the next step of the animation
 			this.update();
 		}
@@ -499,11 +486,11 @@ jQuery.fx.prototype = {
 
 jQuery.extend( jQuery.fx, {
 	tick: function() {
-		var timers = jQuery.timers;
-
-		for ( var i = 0; i < timers.length; i++ ) {
+		var timers = jQuery.timers,
+			i = timers.length;
+		while ( i-- ) {
 			if ( !timers[i]() ) {
-				timers.splice(i--, 1);
+				timers.splice(i, 1);
 			}
 		}
 
@@ -549,6 +536,7 @@ if ( jQuery.expr && jQuery.expr.filters ) {
 	};
 }
 
+// Try to restore the default display value of an element
 function defaultDisplay( nodeName ) {
 
 	if ( !elemdisplay[ nodeName ] ) {
@@ -558,12 +546,9 @@ function defaultDisplay( nodeName ) {
 
 		elem.remove();
 
+		// If the simple way fails,
+		// get element's real default display by attaching it to a temp iframe
 		if ( display === "none" || display === "" ) {
-
-			// Get element's real default display by attaching it to a temp iframe
-			// Conritbutions from Louis Remi and Julian Aurbourg
-			// based on recommendation by Louis Remi
-			
 			// No iframe to use yet, so create it
 			if ( !iframe ) {
 				iframe = document.createElement( "iframe" );
@@ -596,6 +581,25 @@ function defaultDisplay( nodeName ) {
 	return elemdisplay[ nodeName ];
 }
 
+// Animations created synchronously will run synchronously
+function createFxNow() {
+	setTimeout( clearFxNow, 0 );
+	return ( fxNow = jQuery.now() );
+}
+
+function clearFxNow() {
+	fxNow = undefined;
+}
+
+// Generate parameters to create a standard animation
+function genFx( type, num ) {
+	var obj = {};
 
+	jQuery.each( fxAttrs.concat.apply([], fxAttrs.slice(0,num)), function() {
+		obj[ this ] = type;
+	});
+
+	return obj;
+}
 
 })( jQuery );