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animate.js
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animate.js
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~function () {
/*
* 为了保证当前ANIMATE的独立运作,我们把需要使用的一些工具方法提前在这里设定好
*/
var utils = (function () {
var isCompatible = 'getElementsByClassName' in document;
function getCss(curEle, attr) {
var value = null, reg = null;
if (isCompatible) {
value = window.getComputedStyle(curEle, null)[attr];
} else {
if (attr === 'opacity') {
value = curEle.currentStyle['filter'];
reg = /^alpha\(opacity=(.+)\)$/i;
return reg.test(value) ? reg.exec(value)[1] / 100 : 1;
}
value = curEle.currentStyle[attr];
}
reg = /^-?\d+(.\d+)?(pt|px|rem|em)?$/i;
return reg.test(value) ? parseFloat(value) : value;
}
function setCss(curEle, attr, value) {
if (attr === 'opacity') {
curEle.style.opacity = value;
curEle.style.filter = 'alpha(opacity=' + value * 100 + ')';
return;
}
!isNaN(value) && !/(fontWeight|lineHeight|zoom|zIndex)/i.test(attr) ? value += 'px' : null;
curEle.style[attr] = value;
}
function setGroupCss(curEle, options) {
if (Object.prototype.toString.call(options) !== '[object Object]') return;
for (var attr in options) {
if (options.hasOwnProperty(attr)) {
setCss(curEle, attr, options[attr])
}
}
}
function css() {
var len = arguments.length,
type = Object.prototype.toString.call(arguments[1]),
fn = getCss;
len >= 3 ? fn = setCss : (len === 2 && type === '[object Object]' ? fn = setGroupCss : null)
return fn.apply(this, arguments);
}
return {
css: css
}
})();
/*
* 运动公式:支持匀速和非匀速
* t：time当前运动的时间
* b：begin当前方向的起始位置
* c：change当前方向的距离
* d：duration当前运动的总时间
*/
var animationEffect = {
Linear: function (t, b, c, d) {
return c * t / d + b;
},
Bounce: {
easeIn: function (t, b, c, d) {
return c - animationEffect.Bounce.easeOut(d - t, 0, c, d) + b;
},
easeOut: function (t, b, c, d) {
if ((t /= d) < (1 / 2.75)) {
return c * (7.5625 * t * t) + b;
} else if (t < (2 / 2.75)) {
return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b;
} else if (t < (2.5 / 2.75)) {
return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b;
} else {
return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b;
}
},
easeInOut: function (t, b, c, d) {
if (t < d / 2) {
return animationEffect.Bounce.easeIn(t * 2, 0, c, d) * .5 + b;
}
return animationEffect.Bounce.easeOut(t * 2 - d, 0, c, d) * .5 + c * .5 + b;
}
},
Quad: {
easeIn: function (t, b, c, d) {
return c * (t /= d) * t + b;
},
easeOut: function (t, b, c, d) {
return -c * (t /= d) * (t - 2) + b;
},
easeInOut: function (t, b, c, d) {
if ((t /= d / 2) < 1) {
return c / 2 * t * t + b;
}
return -c / 2 * ((--t) * (t - 2) - 1) + b;
}
},
Cubic: {
easeIn: function (t, b, c, d) {
return c * (t /= d) * t * t + b;
},
easeOut: function (t, b, c, d) {
return c * ((t = t / d - 1) * t * t + 1) + b;
},
easeInOut: function (t, b, c, d) {
if ((t /= d / 2) < 1) {
return c / 2 * t * t * t + b;
}
return c / 2 * ((t -= 2) * t * t + 2) + b;
}
},
Quart: {
easeIn: function (t, b, c, d) {
return c * (t /= d) * t * t * t + b;
},
easeOut: function (t, b, c, d) {
return -c * ((t = t / d - 1) * t * t * t - 1) + b;
},
easeInOut: function (t, b, c, d) {
if ((t /= d / 2) < 1) {
return c / 2 * t * t * t * t + b;
}
return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
}
},
Quint: {
easeIn: function (t, b, c, d) {
return c * (t /= d) * t * t * t * t + b;
},
easeOut: function (t, b, c, d) {
return c * ((t = t / d - 1) * t * t * t * t + 1) + b;
},
easeInOut: function (t, b, c, d) {
if ((t /= d / 2) < 1) {
return c / 2 * t * t * t * t * t + b;
}
return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
}
},
Sine: {
easeIn: function (t, b, c, d) {
return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
},
easeOut: function (t, b, c, d) {
return c * Math.sin(t / d * (Math.PI / 2)) + b;
},
easeInOut: function (t, b, c, d) {
return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
}
},
Expo: {
easeIn: function (t, b, c, d) {
return (t == 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b;
},
easeOut: function (t, b, c, d) {
return (t == d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b;
},
easeInOut: function (t, b, c, d) {
if (t == 0) return b;
if (t == d) return b + c;
if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
}
},
Circ: {
easeIn: function (t, b, c, d) {
return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
},
easeOut: function (t, b, c, d) {
return c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
},
easeInOut: function (t, b, c, d) {
if ((t /= d / 2) < 1) {
return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
}
return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
}
},
Back: {
easeIn: function (t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c * (t /= d) * t * ((s + 1) * t - s) + b;
},
easeOut: function (t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
},
easeInOut: function (t, b, c, d, s) {
if (s == undefined) s = 1.70158;
if ((t /= d / 2) < 1) {
return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
}
return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
}
},
Elastic: {
easeIn: function (t, b, c, d, a, p) {
if (t == 0) return b;
if ((t /= d) == 1) return b + c;
if (!p) p = d * .3;
var s;
!a || a < Math.abs(c) ? (a = c, s = p / 4) : s = p / (2 * Math.PI) * Math.asin(c / a);
return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
},
easeOut: function (t, b, c, d, a, p) {
if (t == 0) return b;
if ((t /= d) == 1) return b + c;
if (!p) p = d * .3;
var s;
!a || a < Math.abs(c) ? (a = c, s = p / 4) : s = p / (2 * Math.PI) * Math.asin(c / a);
return (a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b);
},
easeInOut: function (t, b, c, d, a, p) {
if (t == 0) return b;
if ((t /= d / 2) == 2) return b + c;
if (!p) p = d * (.3 * 1.5);
var s;
!a || a < Math.abs(c) ? (a = c, s = p / 4) : s = p / (2 * Math.PI) * Math.asin(c / a);
if (t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b;
}
}
};
window.animateEffect = animationEffect;
/*
* animate：支持指定时间内的多方向匀速或者非匀速运动动画库
* @parameter
* options.curEle：当前需要运动的元素
* options.target：目标位置信息 {xxx:xxx...}
* options.duration：运动的总时间
* options.effect：运动的方式(匀速或者非匀速:它是一个运动的公式)
* options.callBack：回调函数，当动画运行完成后需要做的事情，当做回调函数传递进来即可
*/
window.animate = animate;
function animate(options) {
//=>init parameter
var _default = {
curEle: null,
target: null,
duration: 1000,
effect: animationEffect.Linear,
callBack: null
};
for (var key in options) {
if (options.hasOwnProperty(key)) {
_default[key] = options[key];
}
}
var curEle = _default.curEle,
target = _default.target,
duration = _default.duration,
effect = _default.effect,
callBack = _default.callBack;
//=>prepare T/B/C/D
var time = null,
begin = {},
change = {};
for (key in target) {
if (target.hasOwnProperty(key)) {
begin[key] = utils.css(curEle, key);
change[key] = target[key] - begin[key];
}
}
//=>running
clearInterval(curEle.animateTimer);
curEle.animateTimer = setInterval(function () {
time += 17;
if (time >= duration) {
utils.css(curEle, target);
clearInterval(curEle.animateTimer);
//=>run callBack
callBack && callBack.call(curEle);
return;
}
var curPos = {};
for (var key in target) {
if (target.hasOwnProperty(key)) {
curPos[key] = effect(time, begin[key], change[key], duration);
}
}
utils.css(curEle, curPos);
}, 17);
}
}();