/adei/trunk

/*  

	Animator.js 1.1.9

	This library is released under the BSD license:

	Copyright (c) 2006, Bernard Sumption. All rights reserved.

	Redistribution and use in source and binary forms, with or without

	modification, are permitted provided that the following conditions are met:

	Redistributions of source code must retain the above copyright notice, this

	list of conditions and the following disclaimer. Redistributions in binary

	form must reproduce the above copyright notice, this list of conditions and

	the following disclaimer in the documentation and/or other materials

	provided with the distribution. Neither the name BernieCode nor

	the names of its contributors may be used to endorse or promote products

	derived from this software without specific prior written permission. 

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

	ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR

	ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

	DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

	SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

	CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

	LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

	OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH

	DAMAGE.

*/

// Applies a sequence of numbers between 0 and 1 to a number of subjects

// construct - see setOptions for parameters

function Animator(options) {

	this.setOptions(options);

	var _this = this;

	this.timerDelegate = function(){_this.onTimerEvent()};

	this.subjects = [];

	this.target = 0;

	this.state = 0;

	this.lastTime = null;

};

Animator.prototype = {

	// apply defaults

	setOptions: function(options) {

		this.options = Animator.applyDefaults({

			interval: 20,  // time between animation frames

			duration: 400, // length of animation

			onComplete: function(){},

			onStep: function(){},

			transition: Animator.tx.easeInOut

		}, options);

	},

	// animate from the current state to provided value

	seekTo: function(to) {

		this.seekFromTo(this.state, to);

	},

	// animate from the current state to provided value

	seekFromTo: function(from, to) {

		this.target = Math.max(0, Math.min(1, to));

		this.state = Math.max(0, Math.min(1, from));

		this.lastTime = new Date().getTime();

		if (!this.intervalId) {

			this.intervalId = window.setInterval(this.timerDelegate, this.options.interval);

		}

	},

	// animate from the current state to provided value

	jumpTo: function(to) {

		this.target = this.state = Math.max(0, Math.min(1, to));

		this.propagate();

	},

	// seek to the opposite of the current target

	toggle: function() {

		this.seekTo(1 - this.target);

	},

	// add a function or an object with a method setState(state) that will be called with a number

	// between 0 and 1 on each frame of the animation

	addSubject: function(subject) {

		this.subjects[this.subjects.length] = subject;

		return this;

	},

	// remove all subjects

	clearSubjects: function() {

		this.subjects = [];

	},

	// forward the current state to the animation subjects

	propagate: function() {

		var value = this.options.transition(this.state);

		for (var i=0; i<this.subjects.length; i++) {

			if (this.subjects[i].setState) {

				this.subjects[i].setState(value);

			} else {

				this.subjects[i](value);

			}

		}

	},

	// called once per frame to update the current state

	onTimerEvent: function() {

		var now = new Date().getTime();

		var timePassed = now - this.lastTime;

		this.lastTime = now;

		var movement = (timePassed / this.options.duration) * (this.state < this.target ? 1 : -1);

		if (Math.abs(movement) >= Math.abs(this.state - this.target)) {

			this.state = this.target;

		} else {

			this.state += movement;

		}

		try {

			this.propagate();

		} finally {

			this.options.onStep.call(this);

			if (this.target == this.state) {

				window.clearInterval(this.intervalId);

				this.intervalId = null;

				this.options.onComplete.call(this);

			}

		}

	},

	// shortcuts

	play: function() {this.seekFromTo(0, 1)},

	reverse: function() {this.seekFromTo(1, 0)},

	// return a string describing this Animator, for debugging

	inspect: function() {

		var str = "#<Animator:\n";

		for (var i=0; i<this.subjects.length; i++) {

			str += this.subjects[i].inspect();

		}

		str += ">";

		return str;

	}

}

// merge the properties of two objects

Animator.applyDefaults = function(defaults, prefs) {

	prefs = prefs || {};

	var prop, result = {};

	for (prop in defaults) result[prop] = prefs[prop] !== undefined ? prefs[prop] : defaults[prop];

	return result;

}

// make an array from any object

Animator.makeArray = function(o) {

	if (o == null) return [];

	if (!o.length) return [o];

	var result = [];

	for (var i=0; i<o.length; i++) result[i] = o[i];

	return result;

}

// convert a dash-delimited-property to a camelCaseProperty (c/o Prototype, thanks Sam!)

Animator.camelize = function(string) {

	var oStringList = string.split('-');

	if (oStringList.length == 1) return oStringList[0];

	var camelizedString = string.indexOf('-') == 0

		? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)

		: oStringList[0];

	for (var i = 1, len = oStringList.length; i < len; i++) {

		var s = oStringList[i];

		camelizedString += s.charAt(0).toUpperCase() + s.substring(1);

	}

	return camelizedString;

}

// syntactic sugar for creating CSSStyleSubjects

Animator.apply = function(el, style, options) {

	if (style instanceof Array) {

		return new Animator(options).addSubject(new CSSStyleSubject(el, style[0], style[1]));

	}

	return new Animator(options).addSubject(new CSSStyleSubject(el, style));

}

// make a transition function that gradually accelerates. pass a=1 for smooth

// gravitational acceleration, higher values for an exaggerated effect

Animator.makeEaseIn = function(a) {

	return function(state) {

		return Math.pow(state, a*2); 

	}

}

// as makeEaseIn but for deceleration

Animator.makeEaseOut = function(a) {

	return function(state) {

		return 1 - Math.pow(1 - state, a*2); 

	}

}

// make a transition function that, like an object with momentum being attracted to a point,

// goes past the target then returns

Animator.makeElastic = function(bounces) {

	return function(state) {

		state = Animator.tx.easeInOut(state);

		return ((1-Math.cos(state * Math.PI * bounces)) * (1 - state)) + state; 

	}

}

// make an Attack Decay Sustain Release envelope that starts and finishes on the same level

// 

Animator.makeADSR = function(attackEnd, decayEnd, sustainEnd, sustainLevel) {

	if (sustainLevel == null) sustainLevel = 0.5;

	return function(state) {

		if (state < attackEnd) {

			return state / attackEnd;

		}

		if (state < decayEnd) {

			return 1 - ((state - attackEnd) / (decayEnd - attackEnd) * (1 - sustainLevel));

		}

		if (state < sustainEnd) {

			return sustainLevel;

		}

		return sustainLevel * (1 - ((state - sustainEnd) / (1 - sustainEnd)));

	}

}

// make a transition function that, like a ball falling to floor, reaches the target and/

// bounces back again

Animator.makeBounce = function(bounces) {

	var fn = Animator.makeElastic(bounces);

	return function(state) {

		state = fn(state); 

		return state <= 1 ? state : 2-state;

	}

}

// pre-made transition functions to use with the 'transition' option

Animator.tx = {

	easeInOut: function(pos){

		return ((-Math.cos(pos*Math.PI)/2) + 0.5);

	},

	linear: function(x) {

		return x;

	},

	easeIn: Animator.makeEaseIn(1.5),

	easeOut: Animator.makeEaseOut(1.5),

	strongEaseIn: Animator.makeEaseIn(2.5),

	strongEaseOut: Animator.makeEaseOut(2.5),

	elastic: Animator.makeElastic(1),

	veryElastic: Animator.makeElastic(3),

	bouncy: Animator.makeBounce(1),

	veryBouncy: Animator.makeBounce(3)

}

// animates a pixel-based style property between two integer values

function NumericalStyleSubject(els, property, from, to, units) {

	this.els = Animator.makeArray(els);

	if (property == 'opacity' && window.ActiveXObject) {

		this.property = 'filter';

	} else {

		this.property = Animator.camelize(property);

	}

	this.from = parseFloat(from);

	this.to = parseFloat(to);

	this.units = units != null ? units : 'px';

}

NumericalStyleSubject.prototype = {

	setState: function(state) {

		var style = this.getStyle(state);

		var visibility = (this.property == 'opacity' && state == 0) ? 'hidden' : '';

		var j=0;

		for (var i=0; i<this.els.length; i++) {

			try {

				this.els[i].style[this.property] = style;

			} catch (e) {

				// ignore fontWeight - intermediate numerical values cause exeptions in firefox

				if (this.property != 'fontWeight') throw e;

			}

			if (j++ > 20) return;

		}

	},

	getStyle: function(state) {

		state = this.from + ((this.to - this.from) * state);

		if (this.property == 'filter') return "alpha(opacity=" + Math.round(state*100) + ")";

		if (this.property == 'opacity') return state;

		return Math.round(state) + this.units;

	},

	inspect: function() {

		return "\t" + this.property + "(" + this.from + this.units + " to " + this.to + this.units + ")\n";

	}

}

// animates a colour based style property between two hex values

function ColorStyleSubject(els, property, from, to) {

	this.els = Animator.makeArray(els);

	this.property = Animator.camelize(property);

	this.to = this.expandColor(to);

	this.from = this.expandColor(from);

	this.origFrom = from;

	this.origTo = to;

}

ColorStyleSubject.prototype = {

	// parse "#FFFF00" to [256, 256, 0]

	expandColor: function(color) {

		var hexColor, red, green, blue;

		hexColor = ColorStyleSubject.parseColor(color);

		if (hexColor) {

			red = parseInt(hexColor.slice(1, 3), 16);

			green = parseInt(hexColor.slice(3, 5), 16);

			blue = parseInt(hexColor.slice(5, 7), 16);

			return [red,green,blue]

		}

		if (window.DEBUG) {

			alert("Invalid colour: '" + color + "'");

		}

	},

	getValueForState: function(color, state) {

		return Math.round(this.from[color] + ((this.to[color] - this.from[color]) * state));

	},

	setState: function(state) {

		var color = '#'

				+ ColorStyleSubject.toColorPart(this.getValueForState(0, state))

				+ ColorStyleSubject.toColorPart(this.getValueForState(1, state))

				+ ColorStyleSubject.toColorPart(this.getValueForState(2, state));

		for (var i=0; i<this.els.length; i++) {

			this.els[i].style[this.property] = color;

		}

	},

	inspect: function() {

		return "\t" + this.property + "(" + this.origFrom + " to " + this.origTo + ")\n";

	}

}

// return a properly formatted 6-digit hex colour spec, or false

ColorStyleSubject.parseColor = function(string) {

	var color = '#', match;

	if(match = ColorStyleSubject.parseColor.rgbRe.exec(string)) {

		var part;

		for (var i=1; i<=3; i++) {

			part = Math.max(0, Math.min(255, parseInt(match[i])));

			color += ColorStyleSubject.toColorPart(part);

		}

		return color;

	}

	if (match = ColorStyleSubject.parseColor.hexRe.exec(string)) {

		if(match[1].length == 3) {

			for (var i=0; i<3; i++) {

				color += match[1].charAt(i) + match[1].charAt(i);

			}

			return color;

		}

		return '#' + match[1];

	}

	return false;

}

// convert a number to a 2 digit hex string

ColorStyleSubject.toColorPart = function(number) {

	if (number > 255) number = 255;

	var digits = number.toString(16);

	if (number < 16) return '0' + digits;

	return digits;

}

ColorStyleSubject.parseColor.rgbRe = /^rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/i;

ColorStyleSubject.parseColor.hexRe = /^\#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/;

// Animates discrete styles, i.e. ones that do not scale but have discrete values

// that can't be interpolated

function DiscreteStyleSubject(els, property, from, to, threshold) {

	this.els = Animator.makeArray(els);

	this.property = Animator.camelize(property);

	this.from = from;

	this.to = to;

	this.threshold = threshold || 0.5;

}

DiscreteStyleSubject.prototype = {

	setState: function(state) {

		var j=0;

		for (var i=0; i<this.els.length; i++) {

			this.els[i].style[this.property] = state <= this.threshold ? this.from : this.to; 

		}

	},

	inspect: function() {

		return "\t" + this.property + "(" + this.from + " to " + this.to + " @ " + this.threshold + ")\n";

	}

}

// animates between two styles defined using CSS.

// if style1 and style2 are present, animate between them, if only style1

// is present, animate between the element's current style and style1

function CSSStyleSubject(els, style1, style2) {

	els = Animator.makeArray(els);

	this.subjects = [];

	if (els.length == 0) return;

	var prop, toStyle, fromStyle;

	if (style2) {

		fromStyle = this.parseStyle(style1, els[0]);

		toStyle = this.parseStyle(style2, els[0]);

	} else {

		toStyle = this.parseStyle(style1, els[0]);

		fromStyle = {};

		for (prop in toStyle) {

			fromStyle[prop] = CSSStyleSubject.getStyle(els[0], prop);

		}

	}

	// remove unchanging properties

	var prop;

	for (prop in fromStyle) {

		if (fromStyle[prop] == toStyle[prop]) {

			delete fromStyle[prop];

			delete toStyle[prop];

		}

	}

	// discover the type (numerical or colour) of each style

	var prop, units, match, type, from, to;

	for (prop in fromStyle) {

		var fromProp = String(fromStyle[prop]);

		var toProp = String(toStyle[prop]);

		if (toStyle[prop] == null) {

			if (window.DEBUG) alert("No to style provided for '" + prop + '"');

			continue;

		}

		if (from = ColorStyleSubject.parseColor(fromProp)) {

			to = ColorStyleSubject.parseColor(toProp);

			type = ColorStyleSubject;

		} else if (fromProp.match(CSSStyleSubject.numericalRe)

				&& toProp.match(CSSStyleSubject.numericalRe)) {

			from = parseFloat(fromProp);

			to = parseFloat(toProp);

			type = NumericalStyleSubject;

			match = CSSStyleSubject.numericalRe.exec(fromProp);

			var reResult = CSSStyleSubject.numericalRe.exec(toProp);

			if (match[1] != null) {

				units = match[1];

			} else if (reResult[1] != null) {

				units = reResult[1];

			} else {

				units = reResult;

			}

		} else if (fromProp.match(CSSStyleSubject.discreteRe)

				&& toProp.match(CSSStyleSubject.discreteRe)) {

			from = fromProp;

			to = toProp;

			type = DiscreteStyleSubject;

			units = 0;   // hack - how to get an animator option down to here

		} else {

			if (window.DEBUG) {

				alert("Unrecognised format for value of "

					+ prop + ": '" + fromStyle[prop] + "'");

			}

			continue;

		}

		this.subjects[this.subjects.length] = new type(els, prop, from, to, units);

	}

}

CSSStyleSubject.prototype = {

	// parses "width: 400px; color: #FFBB2E" to {width: "400px", color: "#FFBB2E"}

	parseStyle: function(style, el) {

		var rtn = {};

		// if style is a rule set

		if (style.indexOf(":") != -1) {

			var styles = style.split(";");

			for (var i=0; i<styles.length; i++) {

				var parts = CSSStyleSubject.ruleRe.exec(styles[i]);

				if (parts) {

					rtn[parts[1]] = parts[2];

				}

			}

		}

		// else assume style is a class name

		else {

			var prop, value, oldClass;

			oldClass = el.className;

			el.className = style;

			for (var i=0; i<CSSStyleSubject.cssProperties.length; i++) {

				prop = CSSStyleSubject.cssProperties[i];

				value = CSSStyleSubject.getStyle(el, prop);

				if (value != null) {

					rtn[prop] = value;

				}

			}

			el.className = oldClass;

		}

		return rtn;

	},

	setState: function(state) {

		for (var i=0; i<this.subjects.length; i++) {

			this.subjects[i].setState(state);

		}

	},

	inspect: function() {

		var str = "";

		for (var i=0; i<this.subjects.length; i++) {

			str += this.subjects[i].inspect();

		}

		return str;

	}

}

// get the current value of a css property, 

CSSStyleSubject.getStyle = function(el, property){

	var style;

	if(document.defaultView && document.defaultView.getComputedStyle){

		style = document.defaultView.getComputedStyle(el, "").getPropertyValue(property);

		if (style) {

			return style;

		}

	}

	property = Animator.camelize(property);

	if(el.currentStyle){

		style = el.currentStyle[property];

	}

	return style || el.style[property]

}

CSSStyleSubject.ruleRe = /^\s*([a-zA-Z\-]+)\s*:\s*(\S(.+\S)?)\s*$/;

CSSStyleSubject.numericalRe = /^-?\d+(?:\.\d+)?(%|[a-zA-Z]{2})?$/;

CSSStyleSubject.discreteRe = /^\w+$/;

// required because the style object of elements isn't enumerable in Safari

/*

CSSStyleSubject.cssProperties = ['background-color','border','border-color','border-spacing',

'border-style','border-top','border-right','border-bottom','border-left','border-top-color',

'border-right-color','border-bottom-color','border-left-color','border-top-width','border-right-width',

'border-bottom-width','border-left-width','border-width','bottom','color','font-size','font-size-adjust',

'font-stretch','font-style','height','left','letter-spacing','line-height','margin','margin-top',

'margin-right','margin-bottom','margin-left','marker-offset','max-height','max-width','min-height',

'min-width','orphans','outline','outline-color','outline-style','outline-width','overflow','padding',

'padding-top','padding-right','padding-bottom','padding-left','quotes','right','size','text-indent',

'top','width','word-spacing','z-index','opacity','outline-offset'];*/

CSSStyleSubject.cssProperties = ['azimuth','background','background-attachment','background-color','background-image','background-position','background-repeat','border-collapse','border-color','border-spacing','border-style','border-top','border-top-color','border-right-color','border-bottom-color','border-left-color','border-top-style','border-right-style','border-bottom-style','border-left-style','border-top-width','border-right-width','border-bottom-width','border-left-width','border-width','bottom','clear','clip','color','content','cursor','direction','display','elevation','empty-cells','css-float','font','font-family','font-size','font-size-adjust','font-stretch','font-style','font-variant','font-weight','height','left','letter-spacing','line-height','list-style','list-style-image','list-style-position','list-style-type','margin','margin-top','margin-right','margin-bottom','margin-left','max-height','max-width','min-height','min-width','orphans','outline','outline-color','outline-style','outline-width','overflow','padding','padding-top','padding-right','padding-bottom','padding-left','pause','position','right','size','table-layout','text-align','text-decoration','text-indent','text-shadow','text-transform','top','vertical-align','visibility','white-space','width','word-spacing','z-index','opacity','outline-offset','overflow-x','overflow-y'];

// chains several Animator objects together

function AnimatorChain(animators, options) {

	this.animators = animators;

	this.setOptions(options);

	for (var i=0; i<this.animators.length; i++) {

		this.listenTo(this.animators[i]);

	}

	this.forwards = false;

	this.current = 0;

}

AnimatorChain.prototype = {

	// apply defaults

	setOptions: function(options) {

		this.options = Animator.applyDefaults({

			// by default, each call to AnimatorChain.play() calls jumpTo(0) of each animator

			// before playing, which can cause flickering if you have multiple animators all

			// targeting the same element. Set this to false to avoid this.

			resetOnPlay: true

		}, options);

	},

	// play each animator in turn

	play: function() {

		this.forwards = true;

		this.current = -1;

		if (this.options.resetOnPlay) {

			for (var i=0; i<this.animators.length; i++) {

				this.animators[i].jumpTo(0);

			}

		}

		this.advance();

	},

	// play all animators backwards

	reverse: function() {

		this.forwards = false;

		this.current = this.animators.length;

		if (this.options.resetOnPlay) {

			for (var i=0; i<this.animators.length; i++) {

				this.animators[i].jumpTo(1);

			}

		}

		this.advance();

	},

	// if we have just play()'d, then call reverse(), and vice versa

	toggle: function() {

		if (this.forwards) {

			this.seekTo(0);

		} else {

			this.seekTo(1);

		}

	},

	// internal: install an event listener on an animator's onComplete option

	// to trigger the next animator

	listenTo: function(animator) {

		var oldOnComplete = animator.options.onComplete;

		var _this = this;

		animator.options.onComplete = function() {

			if (oldOnComplete) oldOnComplete.call(animator);

			_this.advance();

		}

	},

	// play the next animator

	advance: function() {

		if (this.forwards) {

			if (this.animators[this.current + 1] == null) return;

			this.current++;

			this.animators[this.current].play();

		} else {

			if (this.animators[this.current - 1] == null) return;

			this.current--;

			this.animators[this.current].reverse();

		}

	},

	// this function is provided for drop-in compatibility with Animator objects,

	// but only accepts 0 and 1 as target values

	seekTo: function(target) {

		if (target <= 0) {

			this.forwards = false;

			this.animators[this.current].seekTo(0);

		} else {

			this.forwards = true;

			this.animators[this.current].seekTo(1);

		}

	}

}

// an Accordion is a class that creates and controls a number of Animators. An array of elements is passed in,

// and for each element an Animator and a activator button is created. When an Animator's activator button is

// clicked, the Animator and all before it seek to 0, and all Animators after it seek to 1. This can be used to

// create the classic Accordion effect, hence the name.

// see setOptions for arguments

function Accordion(options) {

	this.setOptions(options);

	var selected = this.options.initialSection, current;

	if (this.options.rememberance) {

		current = document.location.hash.substring(1);

	}

	this.rememberanceTexts = [];

	this.ans = [];

	var _this = this;

	for (var i=0; i<this.options.sections.length; i++) {

		var el = this.options.sections[i];

		var an = new Animator(this.options.animatorOptions);

		var from = this.options.from + (this.options.shift * i);

		var to = this.options.to + (this.options.shift * i);

		an.addSubject(new NumericalStyleSubject(el, this.options.property, from, to, this.options.units));

		an.jumpTo(0);

		var activator = this.options.getActivator(el);

		activator.index = i;

		activator.onclick = function(){_this.show(this.index)};

		this.ans[this.ans.length] = an;

		this.rememberanceTexts[i] = activator.innerHTML.replace(/\s/g, "");

		if (this.rememberanceTexts[i] === current) {

			selected = i;

		}

	}

	this.show(selected);

}

Accordion.prototype = {

	// apply defaults

	setOptions: function(options) {

		this.options = Object.extend({

			// REQUIRED: an array of elements to use as the accordion sections

			sections: null,

			// a function that locates an activator button element given a section element.

			// by default it takes a button id from the section's "activator" attibute

			getActivator: function(el) {return document.getElementById(el.getAttribute("activator"))},

			// shifts each animator's range, for example with options {from:0,to:100,shift:20}

			// the animators' ranges will be 0-100, 20-120, 40-140 etc.