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最新推荐文章于 2022-04-03 13:48:18 发布

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最新推荐文章于 2022-04-03 13:48:18 发布

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本文介绍了JavaScript动画效果库moo.fx的源码，包括滚动、文字大小修改、组合效果、折叠效果等。通过Class创建不同效果类，如fx.Scroll、fx.Text和fx.Combo，并提供了过渡、透明度、高度和宽度等多种动画效果。同时，还涉及到fx.RememberHeight和fx.RememberText，它们实现了记住元素高度和文本大小的功能。

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JS 文件如下

/*
moo.fx pack, effects extensions for moo.fx.
by Valerio Proietti (http://mad4milk.net) MIT-style LICENSE
for more info visit (http://moofx.mad4milk.net).
Friday, April 14, 2006
v 1.2.4
*/

//smooth scroll
fx.Scroll = Class.create();
fx.Scroll.prototype = Object.extend(new fx.Base(), {
initialize: function(options) {
this.setOptions(options);
},

scrollTo: function(el){
  var dest = Position.cumulativeOffset($(el))[1];
  var client = window.innerHeight || document.documentElement.clientHeight;
  var full = document.documentElement.scrollHeight;
  var top = window.pageYOffset || document.body.scrollTop || document.documentElement.scrollTop;
  if (dest+client > full) this.custom(top, dest - client + (full-dest));
  else this.custom(top, dest);
},

increase: function(){
window.scrollTo(0, this.now);
}
});

//text size modify, now works with pixels too.
fx.Text = Class.create();
fx.Text.prototype = Object.extend(new fx.Base(), {
initialize: function(el, options) {
  this.el = $(el);
  this.setOptions(options);
  if (!this.options.unit) this.options.unit = "em";
},

increase: function() {
this.el.style.fontSize = this.now + this.options.unit;
}
});

//composition effect: widht/height/opacity
fx.Combo = Class.create();
fx.Combo.prototype = {
setOptions: function(options) {
  this.options = {
   opacity: true,
   height: true,
   width: false
  }
  Object.extend(this.options, options || {});
},

initialize: function(el, options) {
  this.el = $(el);
  this.setOptions(options);
  if (this.options.opacity) {
   this.o = new fx.Opacity(el, options);
   options.onComplete = null;
  }
  if (this.options.height) {
   this.h = new fx.Height(el, options);
   options.onComplete = null;
  }
  if (this.options.width) this.w = new fx.Width(el, options);
},

toggle: function() { this.checkExec('toggle'); },

hide: function(){ this.checkExec('hide'); },

clearTimer: function(){ this.checkExec('clearTimer'); },

checkExec: function(func){
  if (this.o) this.o[func]();
  if (this.h) this.h[func]();
  if (this.w) this.w[func]();
},

//only if width+height
resizeTo: function(hto, wto) {
  if (this.h && this.w) {
   this.h.custom(this.el.offsetHeight, this.el.offsetHeight + hto);
   this.w.custom(this.el.offsetWidth, this.el.offsetWidth + wto);
  }
},

customSize: function(hto, wto) {
  if (this.h && this.w) {
   this.h.custom(this.el.offsetHeight, hto);
   this.w.custom(this.el.offsetWidth, wto);
  }
}
}

fx.Accordion = Class.create();
fx.Accordion.prototype = {
setOptions: function(options) {
  this.options = {
   delay: 100,
   opacity: false
  }
  Object.extend(this.options, options || {});
},

initialize: function(togglers, elements, options) {
  this.elements = elements;
  this.setOptions(options);
  var options = options || '';
  this.fxa = [];
  if (options && options.onComplete) options.onFinish = options.onComplete;
  elements.each(function(el, i){
   options.onComplete = function(){
    if (el.offsetHeight > 0) el.style.height = '1%';
    if (options.onFinish) options.onFinish(el);
   }
   this.fxa[i] = new fx.Combo(el, options);
   this.fxa[i].hide();
  }.bind(this));

  togglers.each(function(tog, i){
   if (typeof tog.onclick == 'function') var exClick = tog.onclick;
   tog.onclick = function(){
    if (exClick) exClick();
    this.showThisHideOpen(elements[i]);
   }.bind(this);
  }.bind(this));
},

showThisHideOpen: function(toShow){
  this.elements.each(function(el, j){
   if (el.offsetHeight > 0 && el != toShow) this.clearAndToggle(el, j);
   if (el == toShow && toShow.offsetHeight == 0) setTimeout(function(){this.clearAndToggle(toShow, j);}.bind(this), this.options.delay);
  }.bind(this));
},

clearAndToggle: function(el, i){
this.fxa[i].clearTimer();
this.fxa[i].toggle();
}
}

//cookie functions based on code by Peter-Paul Koch
setCookie: function(value) {
  var date = new Date();
  date.setTime(date.getTime()+(this.days*24*60*60*1000));
  var expires = "; expires="+date.toGMTString();
  document.cookie = this.el+this.el.id+this.prefix+"="+value+expires+"; path=/";
},

readCookie: function() {
  var nameEQ = this.el+this.el.id+this.prefix + "=";
  var ca = document.cookie.split(';');
  for(var i=0;c=ca[i];i++) {
   while (c.charAt(0)==' ') c = c.substring(1,c.length);
   if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return false;
},

custom: function(from, to){
  if (this.fx.now != to) {
   this.setCookie(to);
   this.fx.custom(from, to);
  }
}
}

fx.RememberHeight = Class.create();
fx.RememberHeight.prototype = Object.extend(new Remember(), {
effect: function(){
  this.fx = new fx.Height(this.el, this.options);
  this.prefix = 'height';
},

toggle: function(){
  if (this.el.offsetHeight == 0) this.setCookie(this.el.scrollHeight);
  else this.setCookie(0);
  this.fx.toggle();
},

resize: function(to){
  this.setCookie(this.el.offsetHeight+to);
  this.fx.custom(this.el.offsetHeight,this.el.offsetHeight+to);
},

hide: function(){
  if (!this.readCookie()) {
   this.fx.hide();
  }
}
});

fx.RememberText = Class.create();
fx.RememberText.prototype = Object.extend(new Remember(), {
effect: function(){
this.fx = new fx.Text(this.el, this.options);
this.prefix = 'text';
}
});

//useful for-replacement
Array.prototype.iterate = function(func){
for(var i=0;i<this.length;i++) func(this[i], i);
}
if (!Array.prototype.each) Array.prototype.each = Array.prototype.iterate;

//Easing Equations (c) 2003 Robert Penner, all rights reserved.
//This work is subject to the terms in http://www.robertpenner.com/easing_terms_of_use.html.

//expo
fx.expoIn = function(pos){
return Math.pow(2, 10 * (pos - 1));
}
fx.expoOut = function(pos){
return (-Math.pow(2, -10 * pos) + 1);
}

//quad
fx.quadIn = function(pos){
return Math.pow(pos, 2);
}
fx.quadOut = function(pos){
return -(pos)*(pos-2);
}

//circ
fx.circOut = function(pos){
return Math.sqrt(1 - Math.pow(pos-1,2));
}
fx.circIn = function(pos){
return -(Math.sqrt(1 - Math.pow(pos, 2)) - 1);
}

//back
fx.backIn = function(pos){
return (pos)*pos*((2.7)*pos - 1.7);
}
fx.backOut = function(pos){
return ((pos-1)*(pos-1)*((2.7)*(pos-1) + 1.7) + 1);
}

//sine
fx.sineOut = function(pos){
return Math.sin(pos * (Math.PI/2));
}
fx.sineIn = function(pos){
return -Math.cos(pos * (Math.PI/2)) + 1;
}
fx.sineInOut = function(pos){
return -(Math.cos(Math.PI*pos) - 1)/2;
}

=================
moo.fx.js
==============

/*
moo.fx, simple effects library built with prototype.js (http://prototype.conio.net).
by Valerio Proietti (http://mad4milk.net) MIT-style LICENSE.
for more info (http://moofx.mad4milk.net).
Sunday, March 05, 2006
v 1.2.3
*/

step: function() {
  var time = (new Date).getTime();
  if (time >= this.options.duration+this.startTime) {
   this.now = this.to;
   clearInterval (this.timer);
   this.timer = null;
   if (this.options.onComplete) setTimeout(this.options.onComplete.bind(this), 10);
  }
  else {
   var Tpos = (time - this.startTime) / (this.options.duration);
   this.now = this.options.transition(Tpos) * (this.to-this.from) + this.from;
  }
  this.increase();
},

custom: function(from, to) {
  if (this.timer != null) return;
  this.from = from;
  this.to = to;
  this.startTime = (new Date).getTime();
  this.timer = setInterval (this.step.bind(this), 13);
},

hide: function() {
this.now = 0;
this.increase();
},

clearTimer: function() {
clearInterval(this.timer);
this.timer = null;
}
}

//stretchers
fx.Layout = Class.create();
fx.Layout.prototype = Object.extend(new fx.Base(), {
initialize: function(el, options) {
  this.el = $(el);
  this.el.style.overflow = "hidden";
  this.iniWidth = this.el.offsetWidth;
  this.iniHeight = this.el.offsetHeight;
  this.setOptions(options);
}
});

fx.Height = Class.create();
Object.extend(Object.extend(fx.Height.prototype, fx.Layout.prototype), {
increase: function() {
this.el.style.height = this.now + "px";
},

toggle: function() {
if (this.el.offsetHeight > 0) this.custom(this.el.offsetHeight, 0);
else this.custom(0, this.el.scrollHeight);
}
});

fx.Width = Class.create();
Object.extend(Object.extend(fx.Width.prototype, fx.Layout.prototype), {
increase: function() {
this.el.style.width = this.now + "px";
},

toggle: function(){
if (this.el.offsetWidth > 0) this.custom(this.el.offsetWidth, 0);
else this.custom(0, this.iniWidth);
}
});

//fader
fx.Opacity = Class.create();
fx.Opacity.prototype = Object.extend(new fx.Base(), {
initialize: function(el, options) {
  this.el = $(el);
  this.now = 1;
  this.increase();
  this.setOptions(options);
},

increase: function() {
  if (this.now == 1 && (/Firefox/.test(navigator.userAgent))) this.now = 0.9999;
  this.setOpacity(this.now);
},

setOpacity: function(opacity) {
  if (opacity == 0 && this.el.style.visibility != "hidden") this.el.style.visibility = "hidden";
  else if (this.el.style.visibility != "visible") this.el.style.visibility = "visible";
  if (window.ActiveXObject) this.el.style.filter = "alpha(opacity=" + opacity*100 + ")";
  this.el.style.opacity = opacity;
},

toggle: function() {
if (this.now > 0) this.custom(1, 0);
else this.custom(0, 1);
}
});

//transitions
fx.sinoidal = function(pos){
return ((-Math.cos(pos*Math.PI)/2) + 0.5);
//this transition is from script.aculo.us
}
fx.linear = function(pos){
return pos;
}
fx.cubic = function(pos){
return Math.pow(pos, 3);
}
fx.circ = function(pos){
return Math.sqrt(pos);
}
==============

prototype.lite.js
=================================
/* Prototype JavaScript framework
* (c) 2005 Sam Stephenson <sam@conio.net>
* Prototype is freely distributable under the terms of an MIT-style license.
* For details, see the Prototype web site: http://prototype.conio.net/
/*--------------------------------------------------------------------------*/

//note: modified & stripped down version of prototype, to be used with moo.fx by mad4milk (http://moofx.mad4milk.net).

var Class = {
create: function() {
  return function() {
   this.initialize.apply(this, arguments);
  }
}
}

Object.extend = function(destination, source) {
for (property in source) destination[property] = source[property];
return destination;
}

Function.prototype.bind = function(object) {
var __method = this;
return function() {
return __method.apply(object, arguments);
}
}

Function.prototype.bindAsEventListener = function(object) {
var __method = this;
return function(event) {
__method.call(object, event || window.event);
}
}

function $() {
if (arguments.length == 1) return get$(arguments[0]);
var elements = [];
$c(arguments).each(function(el){
elements.push(get$(el));
});
return elements;

function get$(el){
if (typeof el == 'string') el = document.getElementById(el);
return el;
}
}

if (!window.Element) var Element = new Object();

Object.extend(Element, {
remove: function(element) {
element = $(element);
element.parentNode.removeChild(element);
},

hasClassName: function(element, className) {
  element = $(element);
  if (!element) return;
  var hasClass = false;
  element.className.split(' ').each(function(cn){
   if (cn == className) hasClass = true;
  });
  return hasClass;
},

addClassName: function(element, className) {
  element = $(element);
  Element.removeClassName(element, className);
  element.className += ' ' + className;
},

removeClassName: function(element, className) {
  element = $(element);
  if (!element) return;
  var newClassName = '';
  element.className.split(' ').each(function(cn, i){
   if (cn != className){
    if (i > 0) newClassName += ' ';
    newClassName += cn;
   }
  });
  element.className = newClassName;
},

cleanWhitespace: function(element) {
  element = $(element);
  $c(element.childNodes).each(function(node){
   if (node.nodeType == 3 && !//S/.test(node.nodeValue)) Element.remove(node);
  });
},

find: function(element, what) {
  element = $(element)[what];
  while (element.nodeType != 1) element = element[what];
  return element;
}
});

document.getElementsByClassName = function(className) {
var children = document.getElementsByTagName('*') || document.all;
var elements = [];
$c(children).each(function(child){
if (Element.hasClassName(child, className)) elements.push(child);
});
return elements;
}

//useful array functions
Array.prototype.iterate = function(func){
for(var i=0;i<this.length;i++) func(this[i], i);
}
if (!Array.prototype.each) Array.prototype.each = Array.prototype.iterate;

function $c(array){
var nArray = [];
for (var i=0;i<array.length;i++) nArray.push(array[i]);
return nArray;
}