/**
* Provides the base Transition class, for animating numeric properties.
*
* @module transition
* @submodule transition-timer
*/
var Transition = Y.Transition;
Y.mix(Transition.prototype, {
_start: function() {
if (Transition.useNative) {
this._runNative();
} else {
this._runTimer();
}
},
_runTimer: function() {
var anim = this;
anim._initAttrs();
Transition._running[Y.stamp(anim)] = anim;
anim._startTime = new Date();
Transition._startTimer();
},
_endTimer: function() {
var anim = this;
delete Transition._running[Y.stamp(anim)];
anim._startTime = null;
},
_runFrame: function() {
var t = new Date() - this._startTime;
this._runAttrs(t);
},
_runAttrs: function(time) {
var anim = this,
node = anim._node,
config = anim._config,
uid = Y.stamp(node),
attrs = Transition._nodeAttrs[uid],
customAttr = Transition.behaviors,
done = false,
allDone = false,
data,
name,
attribute,
setter,
elapsed,
delay,
d,
t,
i;
for (name in attrs) {
if ((attribute = attrs[name]) && attribute.transition === anim) {
d = attribute.duration;
delay = attribute.delay;
elapsed = (time - delay) / 1000;
t = time;
data = {
type: 'propertyEnd',
propertyName: name,
config: config,
elapsedTime: elapsed
};
setter = (i in customAttr && 'set' in customAttr[i]) ?
customAttr[i].set : Transition.DEFAULT_SETTER;
done = (t >= d);
if (t > d) {
t = d;
}
if (!delay || time >= delay) {
setter(anim, name, attribute.from, attribute.to, t - delay, d - delay,
attribute.easing, attribute.unit);
if (done) {
delete attrs[name];
anim._count--;
if (config[name] && config[name].on && config[name].on.end) {
config[name].on.end.call(Y.one(node), data);
}
//node.fire('transition:propertyEnd', data);
if (!allDone && anim._count <= 0) {
allDone = true;
anim._end(elapsed);
anim._endTimer();
}
}
}
}
}
},
_initAttrs: function() {
var anim = this,
customAttr = Transition.behaviors,
uid = Y.stamp(anim._node),
attrs = Transition._nodeAttrs[uid],
attribute,
duration,
delay,
easing,
val,
name,
mTo,
mFrom,
unit, begin, end;
for (name in attrs) {
if ((attribute = attrs[name]) && attribute.transition === anim) {
duration = attribute.duration * 1000;
delay = attribute.delay * 1000;
easing = attribute.easing;
val = attribute.value;
// only allow supported properties
if (name in anim._node.style || name in Y.DOM.CUSTOM_STYLES) {
begin = (name in customAttr && 'get' in customAttr[name]) ?
customAttr[name].get(anim, name) : Transition.DEFAULT_GETTER(anim, name);
mFrom = Transition.RE_UNITS.exec(begin);
mTo = Transition.RE_UNITS.exec(val);
begin = mFrom ? mFrom[1] : begin;
end = mTo ? mTo[1] : val;
unit = mTo ? mTo[2] : mFrom ? mFrom[2] : ''; // one might be zero TODO: mixed units
if (!unit && Transition.RE_DEFAULT_UNIT.test(name)) {
unit = Transition.DEFAULT_UNIT;
}
if (typeof easing === 'string') {
if (easing.indexOf('cubic-bezier') > -1) {
easing = easing.substring(13, easing.length - 1).split(',');
} else if (Transition.easings[easing]) {
easing = Transition.easings[easing];
}
}
attribute.from = Number(begin);
attribute.to = Number(end);
attribute.unit = unit;
attribute.easing = easing;
attribute.duration = duration + delay;
attribute.delay = delay;
} else {
delete attrs[name];
anim._count--;
}
}
}
},
destroy: function() {
this.detachAll();
this._node = null;
}
}, true);
Y.mix(Y.Transition, {
_runtimeAttrs: {},
/*
* Regex of properties that should use the default unit.
*
* @property RE_DEFAULT_UNIT
* @static
*/
RE_DEFAULT_UNIT: /^width|height|top|right|bottom|left|margin.*|padding.*|border.*$/i,
/*
* The default unit to use with properties that pass the RE_DEFAULT_UNIT test.
*
* @property DEFAULT_UNIT
* @static
*/
DEFAULT_UNIT: 'px',
/*
* Time in milliseconds passed to setInterval for frame processing
*
* @property intervalTime
* @default 20
* @static
*/
intervalTime: 20,
/*
* Bucket for custom getters and setters
*
* @property behaviors
* @static
*/
behaviors: {
left: {
get: function(anim, attr) {
return Y.DOM._getAttrOffset(anim._node, attr);
}
}
},
/*
* The default setter to use when setting object properties.
*
* @property DEFAULT_SETTER
* @static
*/
DEFAULT_SETTER: function(anim, att, from, to, elapsed, duration, fn, unit) {
from = Number(from);
to = Number(to);
var node = anim._node,
val = Transition.cubicBezier(fn, elapsed / duration);
val = from + val[0] * (to - from);
if (node) {
if (att in node.style || att in Y.DOM.CUSTOM_STYLES) {
unit = unit || '';
Y.DOM.setStyle(node, att, val + unit);
}
} else {
anim._end();
}
},
/*
* The default getter to use when getting object properties.
*
* @property DEFAULT_GETTER
* @static
*/
DEFAULT_GETTER: function(anim, att) {
var node = anim._node,
val = '';
if (att in node.style || att in Y.DOM.CUSTOM_STYLES) {
val = Y.DOM.getComputedStyle(node, att);
}
return val;
},
_startTimer: function() {
if (!Transition._timer) {
Transition._timer = setInterval(Transition._runFrame, Transition.intervalTime);
}
},
_stopTimer: function() {
clearInterval(Transition._timer);
Transition._timer = null;
},
/*
* Called per Interval to handle each animation frame.
* @method _runFrame
* @private
* @static
*/
_runFrame: function() {
var done = true,
anim;
for (anim in Transition._running) {
if (Transition._running[anim]._runFrame) {
done = false;
Transition._running[anim]._runFrame();
}
}
if (done) {
Transition._stopTimer();
}
},
cubicBezier: function(p, t) {
var x0 = 0,
y0 = 0,
x1 = p[0],
y1 = p[1],
x2 = p[2],
y2 = p[3],
x3 = 1,
y3 = 0,
A = x3 - 3 * x2 + 3 * x1 - x0,
B = 3 * x2 - 6 * x1 + 3 * x0,
C = 3 * x1 - 3 * x0,
D = x0,
E = y3 - 3 * y2 + 3 * y1 - y0,
F = 3 * y2 - 6 * y1 + 3 * y0,
G = 3 * y1 - 3 * y0,
H = y0,
x = (((A*t) + B)*t + C)*t + D,
y = (((E*t) + F)*t + G)*t + H;
return [x, y];
},
easings: {
ease: [0.25, 0, 1, 0.25],
linear: [0, 0, 1, 1],
'ease-in': [0.42, 0, 1, 1],
'ease-out': [0, 0, 0.58, 1],
'ease-in-out': [0.42, 0, 0.58, 1]
},
_running: {},
_timer: null,
RE_UNITS: /^(-?\d*\.?\d*){1}(em|ex|px|in|cm|mm|pt|pc|%)*$/
}, true);
Transition.behaviors.top = Transition.behaviors.bottom = Transition.behaviors.right = Transition.behaviors.left;
Y.Transition = Transition;
