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1define( [
2 "../core",
3 "../css/finalPropName",
4
5 "../css"
6], function( jQuery, finalPropName ) {
7
8"use strict";
9
10function Tween( elem, options, prop, end, easing ) {
11 return new Tween.prototype.init( elem, options, prop, end, easing );
12}
13jQuery.Tween = Tween;
14
15Tween.prototype = {
16 constructor: Tween,
17 init: function( elem, options, prop, end, easing, unit ) {
18 this.elem = elem;
19 this.prop = prop;
20 this.easing = easing || jQuery.easing._default;
21 this.options = options;
22 this.start = this.now = this.cur();
23 this.end = end;
24 this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
25 },
26 cur: function() {
27 var hooks = Tween.propHooks[ this.prop ];
28
29 return hooks && hooks.get ?
30 hooks.get( this ) :
31 Tween.propHooks._default.get( this );
32 },
33 run: function( percent ) {
34 var eased,
35 hooks = Tween.propHooks[ this.prop ];
36
37 if ( this.options.duration ) {
38 this.pos = eased = jQuery.easing[ this.easing ](
39 percent, this.options.duration * percent, 0, 1, this.options.duration
40 );
41 } else {
42 this.pos = eased = percent;
43 }
44 this.now = ( this.end - this.start ) * eased + this.start;
45
46 if ( this.options.step ) {
47 this.options.step.call( this.elem, this.now, this );
48 }
49
50 if ( hooks && hooks.set ) {
51 hooks.set( this );
52 } else {
53 Tween.propHooks._default.set( this );
54 }
55 return this;
56 }
57};
58
59Tween.prototype.init.prototype = Tween.prototype;
60
61Tween.propHooks = {
62 _default: {
63 get: function( tween ) {
64 var result;
65
66 // Use a property on the element directly when it is not a DOM element,
67 // or when there is no matching style property that exists.
68 if ( tween.elem.nodeType !== 1 ||
69 tween.elem[ tween.prop ] != null && tween.elem.style[ tween.prop ] == null ) {
70 return tween.elem[ tween.prop ];
71 }
72
73 // Passing an empty string as a 3rd parameter to .css will automatically
74 // attempt a parseFloat and fallback to a string if the parse fails.
75 // Simple values such as "10px" are parsed to Float;
76 // complex values such as "rotate(1rad)" are returned as-is.
77 result = jQuery.css( tween.elem, tween.prop, "" );
78
79 // Empty strings, null, undefined and "auto" are converted to 0.
80 return !result || result === "auto" ? 0 : result;
81 },
82 set: function( tween ) {
83
84 // Use step hook for back compat.
85 // Use cssHook if its there.
86 // Use .style if available and use plain properties where available.
87 if ( jQuery.fx.step[ tween.prop ] ) {
88 jQuery.fx.step[ tween.prop ]( tween );
89 } else if ( tween.elem.nodeType === 1 && (
90 jQuery.cssHooks[ tween.prop ] ||
91 tween.elem.style[ finalPropName( tween.prop ) ] != null ) ) {
92 jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
93 } else {
94 tween.elem[ tween.prop ] = tween.now;
95 }
96 }
97 }
98};
99
100// Support: IE <=9 only
101// Panic based approach to setting things on disconnected nodes
102Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
103 set: function( tween ) {
104 if ( tween.elem.nodeType && tween.elem.parentNode ) {
105 tween.elem[ tween.prop ] = tween.now;
106 }
107 }
108};
109
110jQuery.easing = {
111 linear: function( p ) {
112 return p;
113 },
114 swing: function( p ) {
115 return 0.5 - Math.cos( p * Math.PI ) / 2;
116 },
117 _default: "swing"
118};
119
120jQuery.fx = Tween.prototype.init;
121
122// Back compat <1.8 extension point
123jQuery.fx.step = {};
124
125} );