Effects: 1.8 Animation Rewrite - thanks @mikesherov and @gibson042

1 files changed, 537 insertions, 534 deletions

diff --git a/src/effects.js b/src/effects.js
index 24d3d34a8..b6a374fb4 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -1,274 +1,487 @@
 (function( jQuery ) {
 
-var elemdisplay = {},
-	iframe, iframeDoc,
+var fxNow, timerId, iframe, iframeDoc,
+	elemdisplay = {},
 	rfxtypes = /^(?:toggle|show|hide)$/,
-	rfxnum = /^([+\-]=)?([\d+.\-]+)([a-z%]*)$/i,
-	rMarginProp = /^margin/,
-	timerId,
-	fxAttrs = [
-		// height animations
-		[ "height", "marginTop", "marginBottom", "paddingTop", "paddingBottom" ],
-		// width animations
-		[ "width", "marginLeft", "marginRight", "paddingLeft", "paddingRight" ],
-		// opacity animations
-		[ "opacity" ]
-	],
-	fxNow;
-
-jQuery.fn.extend({
-	show: function( speed, easing, callback ) {
-		var elem, display;
+	rfxnum = /^([\-+]=)?((?:\d*\.)?\d+)([a-z%]*)$/i,
+	rrun = /\.run$/,
+	animationPrefilters = [],
+	tweeners = {
+		"*": [function( prop, value ) {
+			var end, unit,
+				tween = this.createTween( prop, value ),
+				parts = rfxnum.exec( value ),
+				start = tween.cur();
+
+			if ( parts ) {
+				end = +parts[2];
+				unit = parts[3] || ( jQuery.cssNumber[ prop ] ? "" : "px" );
+
+				// We need to compute starting value
+				if ( unit !== "px" ) {
+					jQuery.style( this, prop, (end || 1) + unit);
+					start = start * (end || 1) / tween.cur() || 0;
+					jQuery.style( this, prop, start + unit);
+				}
 
-		if ( speed || speed === 0 ) {
-			return this.animate( genFx("show", 3), speed, easing, callback );
+				tween.unit = unit;
+				tween.start = start;
+				// If a +=/-= token was provided, we're doing a relative animation
+				tween.end = parts[1] ? start + end * ( parts[1] === "-=" ? -1 : 1 ) : end;
+			}
+			return tween;
+		}]
+	},
+	oldToggle = jQuery.fn.toggle;
 
-		} else {
-			for ( var i = 0, j = this.length; i < j; i++ ) {
-				elem = this[ i ];
+// Animations created synchronously will run synchronously
+function createFxNow() {
+	setTimeout(function() {
+		fxNow = undefined;
+	}, 0 );
+	return ( fxNow = jQuery.now() );
+}
 
-				if ( elem.style ) {
-					display = elem.style.display;
+function callTweeners( animation, props ) {
+	jQuery.each( props, function( prop, value ) {
+		var collection = ( tweeners[ prop ] || [] ).concat( tweeners[ "*" ] ),
+			index = 0,
+			length = collection.length;
+		for ( ; index < length; index++ ) {
+			if ( collection[ index ].call( animation, prop, value ) ) {
+				// we're done with this property
+				return;
+			}
+		}
+	});
+}
 
-					// Reset the inline display of this element to learn if it is
-					// being hidden by cascaded rules or not
-					if ( !jQuery._data(elem, "olddisplay") && display === "none" ) {
-						display = elem.style.display = "";
-					}
+function Animation( elem, properties, options ) {
+	var result,
+		index = 0,
+		tweenerIndex = 0,
+		length = animationPrefilters.length,
+		finished = jQuery.Deferred(),
+		deferred = jQuery.Deferred().always(function( ended ) {
+			// remove cirular reference
+			delete animation.tick;
+
+			if ( deferred.state() === "resolved" || ended ) {
+				// fire callbacks
+				finished.resolveWith( this );
+			}
+		}),
+		animation = deferred.promise({
+			elem: elem,
+			originalProperties: properties,
+			originalOptions: options,
+			props: jQuery.extend( {}, properties ),
+			opts: jQuery.extend( {}, options ),
+			startTime: fxNow || createFxNow(),
+			duration: options.duration,
+			finish: finished.done,
+			tweens: [],
+			createTween: function( prop, end, easing ) {
+				var tween = jQuery.Tween( elem, animation.opts, prop, end,
+						animation.opts.specialEasing[ prop ] || animation.opts.easing );
+				animation.tweens.push( tween );
+				return tween;
+			},
+			tick: function() {
+				var currentTime = fxNow || createFxNow(),
+					remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
+					percent = 1 - ( remaining / animation.duration || 0 ),
+					index = 0,
+					length = animation.tweens.length;
+
+				for ( ; index < length ; index++ ) {
+					animation.tweens[ index ].run( percent );
+				}
 
-					// Set elements which have been overridden with display: none
-					// in a stylesheet to whatever the default browser style is
-					// for such an element
-					if ( (display === "" && jQuery.css(elem, "display") === "none") ||
-						!jQuery.contains( elem.ownerDocument.documentElement, elem ) ) {
-						jQuery._data( elem, "olddisplay", defaultDisplay(elem.nodeName) );
-					}
+				if ( percent < 1 && length ) {
+					return remaining;
+				} else {
+					deferred.resolveWith( elem, [ currentTime ] );
+					return false;
+				}
+			},
+			stop: function( gotoEnd ) {
+				var index = 0,
+					// 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;
+
+				for ( ; index < length ; index++ ) {
+					animation.tweens[ index ].run( 1 );
 				}
+				deferred.rejectWith( elem, [ gotoEnd ] );
+				return this;
 			}
+		}),
+		props = animation.props;
 
-			// Set the display of most of the elements in a second loop
-			// to avoid the constant reflow
-			for ( i = 0; i < j; i++ ) {
-				elem = this[ i ];
+	propFilter( props );
 
-				if ( elem.style ) {
-					display = elem.style.display;
+	for ( ; index < length ; index++ ) {
+		result = animationPrefilters[ index ].call( animation,
+			elem, props, animation.opts );
+		if ( result ) {
+			return result;
+		}
+	}
 
-					if ( display === "" || display === "none" ) {
-						elem.style.display = jQuery._data( elem, "olddisplay" ) || "";
-					}
-				}
-			}
+	callTweeners( animation, props );
 
-			return this;
-		}
-	},
+	jQuery.extend( animation.tick, {
+		anim: animation,
+		queue: animation.opts.queue,
+		elem: elem
+	});
 
-	hide: function( speed, easing, callback ) {
-		if ( speed || speed === 0 ) {
-			return this.animate( genFx("hide", 3), speed, easing, callback);
+	jQuery.fx.timer( animation.tick );
+	return animation;
+}
 
-		} else {
-			var elem, display,
-				i = 0,
-				j = this.length;
+function propFilter( props ) {
+	var index, name, hooks, replace;
 
-			for ( ; i < j; i++ ) {
-				elem = this[i];
-				if ( elem.style ) {
-					display = jQuery.css( elem, "display" );
+	// camelCase and expand cssHook pass
+	for ( index in props ) {
+		name = jQuery.camelCase( index );
+		if ( index !== name ) {
+			props[ name ] = props[ index ];
+			delete props[ index ];
+		}
 
-					if ( display !== "none" && !jQuery._data( elem, "olddisplay" ) ) {
-						jQuery._data( elem, "olddisplay", display );
-					}
-				}
-			}
+		hooks = jQuery.cssHooks[ name ];
+		if ( hooks && "expand" in hooks ) {
+			replace = hooks.expand( props[ name ] );
+			delete props[ name ];
 
-			// Set the display of the elements in a second loop
-			// to avoid the constant reflow
-			for ( i = 0; i < j; i++ ) {
-				if ( this[i].style ) {
-					this[i].style.display = "none";
+			// not quite $.extend, this wont overwrite keys already present.
+			// also - reusing 'index' from above because we have the correct "name"
+			for ( index in replace ) {
+				if ( index in props ) {
+					continue;
 				}
+				props[ index ] = replace[ index ];
 			}
+		}
+	}
+}
 
-			return this;
+jQuery.Animation = jQuery.extend( Animation, {
+
+	tweener: function( props, callback ) {
+		if ( jQuery.isFunction( props ) ) {
+			callback = props;
+			props = [ "*" ];
+		} else {
+			props = props.split(" ");
+		}
+
+		var prop,
+			index = 0,
+			length = props.length;
+
+		for ( ; index < length ; index++ ) {
+			prop = props[ index ];
+			tweeners[ prop ] = tweeners[ prop ] || [];
+			tweeners[ prop ].unshift( callback );
 		}
 	},
 
-	// Save the old toggle function
-	_toggle: jQuery.fn.toggle,
+	prefilter: function( callback, prepend ) {
+		if ( prepend ) {
+			animationPrefilters.unshift( callback );
+		} else {
+			animationPrefilters.push( callback );
+		}
+	}
+});
 
-	toggle: function( fn, fn2, callback ) {
-		var bool = typeof fn === "boolean";
+Animation.prefilter(function( elem, props, opts ) {
+	var index, value,
+		style = elem.style;
+
+	// custom easing pass
+	opts.specialEasing = opts.specialEasing || {};
+	for ( index in props ) {
+		value = props[ index ];
+		if ( jQuery.isArray( value ) ) {
+			opts.specialEasing[ index ] = value[ 1 ];
+			value = props[ index ] = value[ 0 ];
+		}
+	}
 
-		if ( jQuery.isFunction(fn) && jQuery.isFunction(fn2) ) {
-			this._toggle.apply( this, arguments );
+	// height/width overflow pass
+	if ( elem.nodeType === 1 && ( props.height || props.width ) ) {
+		// Make sure that nothing sneaks out
+		// Record all 3 overflow attributes because IE does not
+		// change the overflow attribute when overflowX and
+		// overflowY are set to the same value
+		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];
 
-		} else if ( fn == null || bool ) {
-			this.each(function() {
-				var state = bool ? fn : jQuery(this).is(":hidden");
-				jQuery(this)[ state ? "show" : "hide" ]();
-			});
+		// Set display property to inline-block for height/width
+		// animations on inline elements that are having width/height animated
+		if ( jQuery.css( elem, "display" ) === "inline" &&
+				jQuery.css( elem, "float" ) === "none" ) {
+
+			// inline-level elements accept inline-block;
+			// block-level elements need to be inline with layout
+			if ( !jQuery.support.inlineBlockNeedsLayout || defaultDisplay( elem.nodeName ) === "inline" ) {
+				style.display = "inline-block";
+
+			} else {
+				style.zoom = 1;
+			}
+		}
+	}
+
+	if ( opts.overflow ) {
+		style.overflow = "hidden";
+		this.finish(function() {
+			style.overflow = opts.overflow[ 0 ];
+			style.overflowX = opts.overflow[ 1 ];
+			style.overflowY = opts.overflow[ 2 ];
+		});
+	}
+});
 
+// special case show/hide prefilter
+Animation.prefilter(function( elem, props, opts ) {
+	var index, prop, value, length, dataShow, tween,
+		orig = {},
+		handled = [],
+		hidden = jQuery( elem ).is(":hidden");
+
+	for ( index in props ) {
+		value = props[ index ];
+		if ( rfxtypes.exec( value ) ) {
+			delete props[ index ];
+			if ( value === ( hidden ? "hide" : "show" ) ) {
+				continue;
+			}
+			handled.push( index );
+		}
+	}
+
+	length = handled.length;
+	if ( length ) {
+		dataShow = jQuery._data( elem, "fxshow" ) || jQuery._data( elem, "fxshow", {} );
+		if ( hidden ) {
+			showHide([ elem ], true );
 		} else {
-			this.animate(genFx("toggle", 3), fn, fn2, callback);
+			this.finish(function() {
+				showHide([ elem ]);
+			});
 		}
+		this.finish(function() {
+			var prop;
+			jQuery.removeData( elem, "fxshow", true );
+			for ( prop in orig ) {
+				jQuery.style( elem, prop, orig[ prop ] );
+			}
+		});
+		for ( index = 0 ; index < length ; index++ ) {
+			prop = handled[ index ];
+			tween = this.createTween( prop, hidden ? dataShow[ prop ] : 0 );
+			orig[ prop ] = dataShow[ prop ] || jQuery.style( elem, prop );
+
+			if ( !( prop in dataShow ) ) {
+				dataShow[ prop ] = tween.start;
+				if ( hidden ) {
+					tween.end = tween.start;
+					tween.start = prop === "width" || prop === "height" ? 1 : 0;
+				}
+			}
+		}
+	}
+});
 
-		return this;
+function Tween( elem, options, prop, end, easing ) {
+	return new Tween.prototype.init( elem, options, prop, end, easing );
+}
+jQuery.Tween = Tween;
+
+Tween.prototype = {
+	constructor: Tween,
+	init: function( elem, options, prop, end, easing, unit ) {
+		this.elem = elem;
+		this.prop = prop;
+		this.easing = easing || "swing";
+		this.options = options;
+		this.start = this.now = this.cur();
+		this.end = end;
+		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
 	},
+	cur: function() {
+		var hooks = Tween.propHooks[ this.prop ];
 
-	fadeTo: function( speed, to, easing, callback ) {
-		return this.filter(":hidden").css("opacity", 0).show().end()
-					.animate({opacity: to}, speed, easing, callback);
+		return hooks && hooks.get ?
+			hooks.get( this ) :
+			Tween.propHooks._default.get( this );
 	},
+	run: function( percent ) {
+		var eased,
+			hooks = Tween.propHooks[ this.prop ];
 
-	animate: function( prop, speed, easing, callback ) {
-		var optall = jQuery.speed( speed, easing, callback );
+		this.pos = eased = jQuery.easing[ this.easing ]( percent, this.options.duration * percent, 0, 1, this.options.duration );
+		this.now = ( this.end - this.start ) * eased + this.start;
 
-		if ( jQuery.isEmptyObject( prop ) ) {
-			return this.each( optall.complete, [ false ] );
+		if ( this.options.step ) {
+			this.options.step.call( this.elem, this.now, this );
 		}
 
-		// Do not change referenced properties as per-property easing will be lost
-		prop = jQuery.extend( {}, prop );
-
-		function doAnimation() {
-			// XXX 'this' does not always have a nodeName when running the
-			// test suite
-
-			if ( optall.queue === false ) {
-				jQuery._mark( this );
-			}
+		if ( hooks && hooks.set ) {
+			hooks.set( this );
+		} else {
+			Tween.propHooks._default.set( this );
+		}
+		return this;
+	}
+};
 
-			var opt = jQuery.extend( {}, optall ),
-				isElement = this.nodeType === 1,
-				hidden = isElement && jQuery(this).is(":hidden"),
-				name, val, p, e, hooks, replace,
-				parts, start, end, unit,
-				method;
-
-			// will store per property easing and be used to determine when an animation is complete
-			opt.animatedProperties = {};
-
-			// first pass over propertys to expand / normalize
-			for ( p in prop ) {
-				name = jQuery.camelCase( p );
-				if ( p !== name ) {
-					prop[ name ] = prop[ p ];
-					delete prop[ p ];
-				}
+Tween.prototype.init.prototype = Tween.prototype;
 
-				if ( ( hooks = jQuery.cssHooks[ name ] ) && "expand" in hooks ) {
-					replace = hooks.expand( prop[ name ] );
-					delete prop[ name ];
+Tween.propHooks = {
+	_default: {
+		get: function( tween ) {
+			var parsed, result;
 
-					// not quite $.extend, this wont overwrite keys already present.
-					// also - reusing 'p' from above because we have the correct "name"
-					for ( p in replace ) {
-						if ( ! ( p in prop ) ) {
-							prop[ p ] = replace[ p ];
-						}
-					}
-				}
+			if ( tween.elem[ tween.prop ] != null &&
+				(!tween.elem.style || tween.elem.style[ tween.prop ] == null) ) {
+				return tween.elem[ tween.prop ];
 			}
 
-			for ( name in prop ) {
-				val = prop[ name ];
-				// easing resolution: per property > opt.specialEasing > opt.easing > 'swing' (default)
-				if ( jQuery.isArray( val ) ) {
-					opt.animatedProperties[ name ] = val[ 1 ];
-					val = prop[ name ] = val[ 0 ];
-				} else {
-					opt.animatedProperties[ name ] = opt.specialEasing && opt.specialEasing[ name ] || opt.easing || 'swing';
-				}
+			result = jQuery.css( tween.elem, tween.prop );
+			// Empty strings, null, undefined and "auto" are converted to 0,
+			// complex values such as "rotate(1rad)" are returned as is,
+			// simple values such as "10px" are parsed to Float.
+			return isNaN( parsed = parseFloat( result ) ) ?
+				!result || result === "auto" ? 0 : result : parsed;
+		},
+		set: function( tween ) {
+			// use step hook for back compat - use cssHook if its there - use .style if its
+			// available and use plain properties where available
+			if ( jQuery.fx.step[ tween.prop ] ) {
+				jQuery.fx.step[ tween.prop ]( tween );
+			} else if ( tween.elem.style && ( tween.elem.style[ jQuery.cssProps[ tween.prop ] ] != null || jQuery.cssHooks[ tween.prop ] ) ) {
+				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
+			} else {
+				tween.elem[ tween.prop ] = tween.now;
+			}
+		}
+	}
+};
 
-				if ( val === "hide" && hidden || val === "show" && !hidden ) {
-					return opt.complete.call( this );
-				}
+function showHide( elements, show ) {
+	var elem, display,
+		values = [],
+		index = 0,
+		length = elements.length;
 
-				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
-					// overflowY are set to the same value
-					opt.overflow = [ this.style.overflow, this.style.overflowX, this.style.overflowY ];
-
-					// Set display property to inline-block for height/width
-					// animations on inline elements that are having width/height animated
-					if ( jQuery.css( this, "display" ) === "inline" &&
-							jQuery.css( this, "float" ) === "none" ) {
-
-						// inline-level elements accept inline-block;
-						// block-level elements need to be inline with layout
-						if ( !jQuery.support.inlineBlockNeedsLayout || defaultDisplay( this.nodeName ) === "inline" ) {
-							this.style.display = "inline-block";
-
-						} else {
-							this.style.zoom = 1;
-						}
-					}
-				}
+	for ( ; index < length; index++ ) {
+		elem = elements[ index ];
+		if ( !elem.style ) {
+			continue;
+		}
+		values[ index ] = jQuery._data( elem, "olddisplay" );
+		if ( show ) {
+			// Reset the inline display of this element to learn if it is
+			// being hidden by cascaded rules or not
+			if ( !values[ index ] && elem.style.display === "none" ) {
+				elem.style.display = "";
 			}
 
-			if ( opt.overflow != null ) {
-				this.style.overflow = "hidden";
+			// Set elements which have been overridden with display: none
+			// in a stylesheet to whatever the default browser style is
+			// for such an element
+			if ( (elem.style.display === "" && jQuery.css( elem, "display" ) === "none") ||
+				!jQuery.contains( elem.ownerDocument.documentElement, elem ) ) {
+				values[ index ] = jQuery._data( elem, "olddisplay", defaultDisplay(elem.nodeName) );
 			}
+		} else {
+			display = jQuery.css( elem, "display" );
 
-			for ( p in prop ) {
-				e = new jQuery.fx( this, opt, p );
-				val = prop[ p ];
-
-				if ( rfxtypes.test( val ) ) {
+			if ( !values[ index ] && display !== "none" ) {
+				jQuery._data( elem, "olddisplay", display );
+			}
+		}
+	}
 
-					// Tracks whether to show or hide based on private
-					// data attached to the element
-					method = jQuery._data( this, "toggle" + p ) || ( val === "toggle" ? hidden ? "show" : "hide" : 0 );
-					if ( method ) {
-						jQuery._data( this, "toggle" + p, method === "show" ? "hide" : "show" );
-						e[ method ]();
-					} else {
-						e[ val ]();
-					}
+	// Set the display of most of the elements in a second loop
+	// to avoid the constant reflow
+	for ( index = 0; index < length; index++ ) {
+		elem = elements[ index ];
+		if ( !elem.style ) {
+			continue;
+		}
+		if ( !show || elem.style.display === "none" || elem.style.display === "" ) {
+			elem.style.display = show ? values[ index ] || "" : "none";
+		}
+	}
 
-				} else {
-					parts = rfxnum.exec( val );
-					start = e.cur();
+	return elements;
+}
 
-					if ( parts ) {
-						end = parseFloat( parts[2] );
-						unit = parts[3] || ( jQuery.cssNumber[ p ] ? "" : "px" );
+jQuery.fn.extend({
+	show: function( speed, easing, callback ) {
+		return speed || speed === 0 ?
+			this.animate( genFx( "show", true ), speed, easing, callback ) :
+			showHide( this, true );
+	},
+	hide: function( speed, easing, callback ) {
+		return speed || speed === 0 ?
+			this.animate( genFx( "hide", true ), speed, easing, callback ) :
+			showHide( this );
+	},
+	toggle: function( fn, fn2, callback ) {
+		var bool = typeof fn === "boolean";
 
-						// We need to compute starting value
-						if ( unit !== "px" ) {
-							jQuery.style( this, p, (end || 1) + unit);
-							start = ( (end || 1) / e.cur() ) * start;
-							jQuery.style( this, p, start + unit);
-						}
+		if ( jQuery.isFunction( fn ) && jQuery.isFunction( fn2 ) ) {
+			oldToggle.apply( this, arguments );
 
-						// If a +=/-= token was provided, we're doing a relative animation
-						if ( parts[1] ) {
-							end = ( (parts[ 1 ] === "-=" ? -1 : 1) * end ) + start;
-						}
+		} else if ( fn == null || bool ) {
+			this.each(function() {
+				var state = bool ? fn : jQuery( this ).is(":hidden");
+				showHide([ this ], state );
+			});
 
-						e.custom( start, end, unit );
+		} else {
+			this.animate( genFx( "toggle", true ), fn, fn2, callback );
+		}
 
-					} else {
-						e.custom( start, val, "" );
-					}
-				}
-			}
+		return this;
+	},
+	fadeTo: function( speed, to, easing, callback ) {
+		return this.filter(":hidden").css("opacity", 0).show().end()
+					.animate({opacity: to}, speed, easing, callback);
+	},
+	animate: function( prop, speed, easing, callback ) {
+		var optall = jQuery.speed( speed, easing, callback ),
+			doAnimation = function() {
+				Animation( this, prop, optall ).finish( optall.complete );
+			};
 
-			// For JS strict compliance
-			return true;
+		if ( jQuery.isEmptyObject( prop ) ) {
+			return this.each( optall.complete, [ false ] );
 		}
 
+		// Do not change referenced properties as per-property easing will be lost
+		prop = jQuery.extend( {}, prop );
+
 		return optall.queue === false ?
 			this.each( doAnimation ) :
 			this.queue( optall.queue, doAnimation );
 	},
-
 	stop: function( type, clearQueue, gotoEnd ) {
+		var stopQueue = function( elem, data, index ) {
+			var hooks = data[ index ];
+			jQuery.removeData( elem, index, true );
+			hooks.stop( gotoEnd );
+		};
+
 		if ( typeof type !== "string" ) {
 			gotoEnd = clearQueue;
 			clearQueue = type;
@@ -289,15 +502,9 @@ jQuery.fn.extend({
 				jQuery._unmark( true, this );
 			}
 
-			function stopQueue( elem, data, index ) {
-				var hooks = data[ index ];
-				jQuery.removeData( elem, index, true );
-				hooks.stop( gotoEnd );
-			}
-
 			if ( type == null ) {
 				for ( index in data ) {
-					if ( data[ index ] && data[ index ].stop && index.indexOf(".run") === index.length - 4 ) {
+					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
 						stopQueue( this, data, index );
 					}
 				}
@@ -307,13 +514,7 @@ jQuery.fn.extend({
 
 			for ( index = timers.length; index--; ) {
 				if ( timers[ index ].elem === this && (type == null || timers[ index ].queue === type) ) {
-					if ( gotoEnd ) {
-
-						// force the next step to be the last
-						timers[ index ]( true );
-					} else {
-						timers[ index ].saveState();
-					}
+					timers[ index ].anim.stop( gotoEnd );
 					hadTimers = true;
 					timers.splice( index, 1 );
 				}
@@ -327,35 +528,33 @@ jQuery.fn.extend({
 			}
 		});
 	}
-
 });
 
-// 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 = {};
+function genFx( type, includeWidth ) {
+	var which,
+		attrs = { height: type },
+		i = 0;
+
+	// if we include width, step value is 1 to do all cssExpand values,
+	// if we don't include width, step value is 2 to skip over Left and Right
+	for( ; i < 4 ; i += 2 - includeWidth ) {
+		which = jQuery.cssExpand[ i ];
+		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
+	}
 
-	jQuery.each( fxAttrs.concat.apply([], fxAttrs.slice( 0, num )), function() {
-		obj[ this ] = type;
-	});
+	if ( includeWidth ) {
+		attrs.opacity = attrs.width = type;
+	}
 
-	return obj;
+	return attrs;
 }
 
 // Generate shortcuts for custom animations
 jQuery.each({
-	slideDown: genFx( "show", 1 ),
-	slideUp: genFx( "hide", 1 ),
-	slideToggle: genFx( "toggle", 1 ),
+	slideDown: genFx("show"),
+	slideUp: genFx("hide"),
+	slideToggle: genFx("toggle"),
 	fadeIn: { opacity: "show" },
 	fadeOut: { opacity: "hide" },
 	fadeToggle: { opacity: "toggle" }
@@ -365,285 +564,91 @@ jQuery.each({
 	};
 });
 
-jQuery.extend({
-	speed: function( speed, easing, fn ) {
-		var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
-			complete: fn || !fn && easing ||
-				jQuery.isFunction( speed ) && speed,
-			duration: speed,
-			easing: fn && easing || easing && !jQuery.isFunction( easing ) && easing
-		};
-
-		opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
-			opt.duration in jQuery.fx.speeds ? jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;
-
-		// normalize opt.queue - true/undefined/null -> "fx"
-		if ( opt.queue == null || opt.queue === true ) {
-			opt.queue = "fx";
-		}
-
-		// Queueing
-		opt.old = opt.complete;
-
-		opt.complete = function( noUnmark ) {
-			if ( jQuery.isFunction( opt.old ) ) {
-				opt.old.call( this );
-			}
-
-			if ( opt.queue ) {
-				jQuery.dequeue( this, opt.queue );
-			} else if ( noUnmark !== false ) {
-				jQuery._unmark( this );
-			}
-		};
-
-		return opt;
-	},
-
-	easing: {
-		linear: function( p ) {
-			return p;
-		},
-		swing: function( p ) {
-			return ( -Math.cos( p*Math.PI ) / 2 ) + 0.5;
-		}
-	},
+jQuery.speed = function( speed, easing, fn ) {
+	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
+		complete: fn || !fn && easing ||
+			jQuery.isFunction( speed ) && speed,
+		duration: speed,
+		easing: fn && easing || easing && !jQuery.isFunction( easing ) && easing
+	};
 
-	timers: [],
+	opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
+		opt.duration in jQuery.fx.speeds ? jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;
 
-	fx: function( elem, options, prop ) {
-		this.options = options;
-		this.elem = elem;
-		this.prop = prop;
-
-		options.orig = options.orig || {};
+	// normalize opt.queue - true/undefined/null -> "fx"
+	if ( opt.queue == null || opt.queue === true ) {
+		opt.queue = "fx";
 	}
 
-});
-
-jQuery.fx.prototype = {
-	// Simple function for setting a style value
-	update: function() {
-		if ( this.options.step ) {
-			this.options.step.call( this.elem, this.now, this );
-		}
-
-		( jQuery.fx.step[ this.prop ] || jQuery.fx.step._default )( this );
-	},
-
-	// Get the current size
-	cur: function() {
-		if ( this.elem[ this.prop ] != null && (!this.elem.style || this.elem.style[ this.prop ] == null) ) {
-			return this.elem[ this.prop ];
-		}
-
-		var parsed,
-			r = jQuery.css( this.elem, this.prop );
-		// Empty strings, null, undefined and "auto" are converted to 0,
-		// complex values such as "rotate(1rad)" are returned as is,
-		// simple values such as "10px" are parsed to Float.
-		return isNaN( parsed = parseFloat( r ) ) ? !r || r === "auto" ? 0 : r : parsed;
-	},
-
-	// Start an animation from one number to another
-	custom: function( from, to, unit ) {
-		var self = this,
-			fx = jQuery.fx;
-
-		this.startTime = fxNow || createFxNow();
-		this.end = to;
-		this.now = this.start = from;
-		this.pos = this.state = 0;
-		this.unit = unit || this.unit || ( jQuery.cssNumber[ this.prop ] ? "" : "px" );
-
-		function t( gotoEnd ) {
-			return self.step( gotoEnd );
-		}
-
-		t.queue = this.options.queue;
-		t.elem = this.elem;
-		t.saveState = function() {
-			if ( jQuery._data( self.elem, "fxshow" + self.prop ) === undefined ) {
-				if ( self.options.hide ) {
-					jQuery._data( self.elem, "fxshow" + self.prop, self.start );
-				} else if ( self.options.show ) {
-					jQuery._data( self.elem, "fxshow" + self.prop, self.end );
-				}
-			}
-		};
+	// Queueing
+	opt.old = opt.complete;
 
-		if ( t() && jQuery.timers.push(t) && !timerId ) {
-			timerId = setInterval( fx.tick, fx.interval );
+	opt.complete = function( noUnmark ) {
+		if ( jQuery.isFunction( opt.old ) ) {
+			opt.old.call( this );
 		}
-	},
-
-	// Simple 'show' function
-	show: function() {
-		var dataShow = jQuery._data( this.elem, "fxshow" + this.prop );
 
-		// Remember where we started, so that we can go back to it later
-		this.options.orig[ this.prop ] = dataShow || jQuery.style( this.elem, this.prop );
-		this.options.show = true;
-
-		// Begin the animation
-		// Make sure that we start at a small width/height to avoid any flash of content
-		if ( dataShow !== undefined ) {
-			// This show is picking up where a previous hide or show left off
-			this.custom( this.cur(), dataShow );
-		} else {
-			this.custom( this.prop === "width" || this.prop === "height" ? 1 : 0, this.cur() );
+		if ( opt.queue ) {
+			jQuery.dequeue( this, opt.queue );
+		} else if ( noUnmark !== false ) {
+			jQuery._unmark( this );
 		}
+	};
 
-		// Start by showing the element
-		jQuery( this.elem ).show();
-	},
-
-	// Simple 'hide' function
-	hide: function() {
-		// Remember where we started, so that we can go back to it later
-		this.options.orig[ this.prop ] = jQuery._data( this.elem, "fxshow" + this.prop ) || jQuery.style( this.elem, this.prop );
-		this.options.hide = true;
+	return opt;
+};
 
-		// Begin the animation
-		this.custom( this.cur(), 0 );
+jQuery.easing = {
+	linear: function( p ) {
+		return p;
 	},
-
-	// Each step of an animation
-	step: function( gotoEnd ) {
-		var p, n, complete,
-			t = fxNow || createFxNow(),
-			done = true,
-			elem = this.elem,
-			options = this.options;
-
-		if ( gotoEnd || t >= options.duration + this.startTime ) {
-			this.now = this.end;
-			this.pos = this.state = 1;
-			this.update();
-
-			options.animatedProperties[ this.prop ] = true;
-
-			for ( p in options.animatedProperties ) {
-				if ( options.animatedProperties[ p ] !== true ) {
-					done = false;
-				}
-			}
-
-			if ( done ) {
-				// Reset the overflow
-				if ( options.overflow != null && !jQuery.support.shrinkWrapBlocks ) {
-
-					jQuery.each( [ "", "X", "Y" ], function( index, value ) {
-						elem.style[ "overflow" + value ] = options.overflow[ index ];
-					});
-				}
-
-				// Hide the element if the "hide" operation was done
-				if ( options.hide ) {
-					jQuery( elem ).hide();
-				}
-
-				// Reset the properties, if the item has been hidden or shown
-				if ( options.hide || options.show ) {
-					for ( p in options.animatedProperties ) {
-						jQuery.style( elem, p, options.orig[ p ] );
-						jQuery.removeData( elem, "fxshow" + p, true );
-						// Toggle data is no longer needed
-						jQuery.removeData( elem, "toggle" + p, true );
-					}
-				}
-
-				// Execute the complete function
-				// in the event that the complete function throws an exception
-				// we must ensure it won't be called twice. #5684
-
-				complete = options.complete;
-				if ( complete ) {
-
-					options.complete = false;
-					complete.call( elem );
-				}
-			}
-
-			return false;
-
-		} else {
-			// 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();
-		}
-
-		return true;
+	swing: function( p ) {
+		return 0.5 - Math.cos( p*Math.PI ) / 2;
 	}
 };
 
-jQuery.extend( jQuery.fx, {
-	tick: function() {
-		var timer,
-			timers = jQuery.timers,
-			i = 0;
-
-		for ( ; i < timers.length; i++ ) {
-			timer = timers[ i ];
-			// Checks the timer has not already been removed
-			if ( !timer() && timers[ i ] === timer ) {
-				timers.splice( i--, 1 );
-			}
-		}
-
-		if ( !timers.length ) {
-			jQuery.fx.stop();
+jQuery.timers = [];
+jQuery.fx = Tween.prototype.init;
+jQuery.fx.tick = function() {
+	var timer,
+		timers = jQuery.timers,
+		i = 0;
+
+	for ( ; i < timers.length; i++ ) {
+		timer = timers[ i ];
+		// Checks the timer has not already been removed
+		if ( !timer() && timers[ i ] === timer ) {
+			timers.splice( i--, 1 );
 		}
-	},
+	}
 
-	interval: 13,
+	if ( !timers.length ) {
+		jQuery.fx.stop();
+	}
+};
 
-	stop: function() {
-		clearInterval( timerId );
-		timerId = null;
-	},
+jQuery.fx.timer = function( timer ) {
+	if ( timer() && jQuery.timers.push( timer ) && !timerId ) {
+		timerId = setInterval( jQuery.fx.tick, jQuery.fx.interval );
+	}
+};
 
-	speeds: {
-		slow: 600,
-		fast: 200,
-		// Default speed
-		_default: 400
-	},
+jQuery.fx.interval = 13;
 
-	step: {
-		opacity: function( fx ) {
-			jQuery.style( fx.elem, "opacity", fx.now );
-		},
+jQuery.fx.stop = function() {
+	clearInterval( timerId );
+	timerId = null;
+};
 
-		_default: function( fx ) {
-			if ( fx.elem.style && fx.elem.style[ fx.prop ] != null ) {
-				fx.elem.style[ fx.prop ] = fx.now + fx.unit;
-			} else {
-				fx.elem[ fx.prop ] = fx.now;
-			}
-		}
-	}
-});
+jQuery.fx.speeds = {
+	slow: 600,
+	fast: 200,
+	// Default speed
+	_default: 400
+};
 
-// Ensure props that can't be negative don't go there on undershoot easing
-jQuery.each( fxAttrs.concat.apply( [], fxAttrs ), function( i, prop ) {
-	// Exclude marginTop, marginLeft, marginBottom and marginRight from this list
-	if ( !rMarginProp.test( prop ) ) {
-		jQuery.fx.step[ prop ] = function( fx ) {
-			jQuery.style( fx.elem, prop, Math.max(0, fx.now) + fx.unit );
-		};
-	}
-});
+// Back Compat <1.8 extension point
+jQuery.fx.step = {};
 
 if ( jQuery.expr && jQuery.expr.filters ) {
 	jQuery.expr.filters.animated = function( elem ) {
@@ -655,47 +660,45 @@ if ( jQuery.expr && jQuery.expr.filters ) {
 
 // Try to restore the default display value of an element
 function defaultDisplay( nodeName ) {
+	if ( elemdisplay[ nodeName ] ) {
+		return elemdisplay[ nodeName ];
+	}
 
-	if ( !elemdisplay[ nodeName ] ) {
-
-		var body = document.body,
-			elem = jQuery( "<" + nodeName + ">" ).appendTo( body ),
-			display = elem.css( "display" );
-		elem.remove();
-
-		// If the simple way fails,
-		// get element's real default display by attaching it to a temp iframe
-		if ( display === "none" || display === "" ) {
-			// No iframe to use yet, so create it
-			if ( !iframe ) {
-				iframe = document.createElement( "iframe" );
-				iframe.frameBorder = iframe.width = iframe.height = 0;
-			}
-
-			body.appendChild( iframe );
-
-			// Create a cacheable copy of the iframe document on first call.
-			// IE and Opera will allow us to reuse the iframeDoc without re-writing the fake HTML
-			// document to it; WebKit & Firefox won't allow reusing the iframe document.
-			if ( !iframeDoc || !iframe.createElement ) {
-				iframeDoc = ( iframe.contentWindow || iframe.contentDocument ).document;
-				iframeDoc.write( ( jQuery.support.boxModel ? "<!doctype html>" : "" ) + "<html><body>" );
-				iframeDoc.close();
-			}
-
-			elem = iframeDoc.createElement( nodeName );
-
-			iframeDoc.body.appendChild( elem );
-
-			display = jQuery.css( elem, "display" );
-			body.removeChild( iframe );
+	var elem = jQuery( "<" + nodeName + ">" ).appendTo( document.body ),
+		display = elem.css("display");
+	elem.remove();
+
+	// If the simple way fails,
+	// get element's real default display by attaching it to a temp iframe
+	if ( display === "none" || display === "" ) {
+		// Use the already-created iframe if possible
+		iframe = document.body.appendChild(
+			iframe || jQuery.extend( document.createElement("iframe"), {
+				frameBorder: 0,
+				width: 0,
+				height: 0
+			})
+		);
+
+		// Create a cacheable copy of the iframe document on first call.
+		// IE and Opera will allow us to reuse the iframeDoc without re-writing the fake HTML
+		// document to it; WebKit & Firefox won't allow reusing the iframe document.
+		if ( !iframeDoc || !iframe.createElement ) {
+			iframeDoc = ( iframe.contentWindow || iframe.contentDocument ).document;
+			iframeDoc.write( ( jQuery.support.boxModel ? "<!doctype html>" : "" ) + "<html><body>" );
+			iframeDoc.close();
 		}
 
-		// Store the correct default display
-		elemdisplay[ nodeName ] = display;
+		elem = iframeDoc.body.appendChild( iframeDoc.createElement(nodeName) );
+
+		display = jQuery.css( elem, "display" );
+		document.body.removeChild( iframe );
 	}
 
-	return elemdisplay[ nodeName ];
+	// Store the correct default display
+	elemdisplay[ nodeName ] = display;
+
+	return display;
 }
 
 })( jQuery );