/* Copyright (c) 2006, Yahoo! Inc. All rights reserved. */
YAHOO.util.Anim = function(el, attributes, duration, method)
{ if (el) { this.init(el, attributes, duration, method); } }; YAHOO.util.Anim.prototype = { doMethod: function(attribute, start, end) { return this.method(this.currentFrame, start, end - start, this.totalFrames); }, setAttribute: function(attribute, val, unit) { YAHOO.util.Dom.setStyle(this.getEl(), attribute, val + unit); }, getAttribute: function(attribute) { return parseFloat(YAHOO.util.Dom.getStyle(this.getEl(), attribute)); }, defaultUnit: 'px', defaultUnits: { opacity: ' ' }, init: function(el, attributes, duration, method) {
    var isAnimated = false; var startTime = null; var endTime = null; var actualFrames = 0; var defaultValues = {}; el = YAHOO.util.Dom.get(el); this.attributes = attributes || {}; this.duration = duration || 1; this.method = method || YAHOO.util.Easing.easeNone; this.useSeconds = true; this.currentFrame = 0; this.totalFrames = YAHOO.util.AnimMgr.fps; this.getEl = function() { return el; }; this.setDefault = function(attribute, val) {
        if (val.constructor != Array && (val == 'auto' || isNaN(val))) {
            switch (attribute) {
                case 'width': val = el.clientWidth || el.offsetWidth; break; case 'height': val = el.clientHeight || el.offsetHeight; break; case 'left': if (YAHOO.util.Dom.getStyle(el, 'position') == 'absolute') { val = el.offsetLeft; } else { val = 0; }
                    break; case 'top': if (YAHOO.util.Dom.getStyle(el, 'position') == 'absolute') { val = el.offsetTop; } else { val = 0; }
                    break; default: val = 0;
            } 
        }
        defaultValues[attribute] = val;
    }; this.getDefault = function(attribute) { return defaultValues[attribute]; }; this.isAnimated = function() { return isAnimated; }; this.getStartTime = function() { return startTime; }; this.animate = function() {
        if (this.isAnimated()) { return false; }
        this.onStart.fire(); this._onStart.fire(); this.totalFrames = (this.useSeconds) ? Math.ceil(YAHOO.util.AnimMgr.fps * this.duration) : this.duration; YAHOO.util.AnimMgr.registerElement(this); var attributes = this.attributes; var el = this.getEl(); var val; for (var attribute in attributes) { val = this.getAttribute(attribute); this.setDefault(attribute, val); }
        isAnimated = true; actualFrames = 0; startTime = new Date();
    }; this.stop = function() {
        if (!this.isAnimated()) { return false; }
        this.currentFrame = 0; endTime = new Date(); var data = { time: endTime, duration: endTime - startTime, frames: actualFrames, fps: actualFrames / this.duration }; isAnimated = false; actualFrames = 0; this.onComplete.fire(data);
    }; var onTween = function() {
        var start; var end = null; var val; var unit; var attributes = this['attributes']; for (var attribute in attributes) {
            unit = attributes[attribute]['unit'] || this.defaultUnits[attribute] || this.defaultUnit; if (typeof attributes[attribute]['from'] != 'undefined') { start = attributes[attribute]['from']; } else { start = this.getDefault(attribute); }
            if (typeof attributes[attribute]['to'] != 'undefined') { end = attributes[attribute]['to']; }
            else if (typeof attributes[attribute]['by'] != 'undefined') {
                if (typeof start !== 'string') {
                    end = []; for (var i = 0, len = start.length; i < len; ++i)
                    { end[i] = start[i] + attributes[attribute]['by'][i]; } 
                }
                else
                { end = start + attributes[attribute]['by']; } 
            }
            if (end !== null && typeof end != 'undefined') {
                val = this.doMethod(attribute, start, end); if ((attribute == 'width' || attribute == 'height' || attribute == 'opacity') && val < 0) { val = 0; }
                this.setAttribute(attribute, val, unit);
            } 
        }
        actualFrames += 1;
    }; this._onStart = new YAHOO.util.CustomEvent('_onStart', this); this.onStart = new YAHOO.util.CustomEvent('start', this); this.onTween = new YAHOO.util.CustomEvent('tween', this); this._onTween = new YAHOO.util.CustomEvent('_tween', this); this.onComplete = new YAHOO.util.CustomEvent('complete', this); this._onTween.subscribe(onTween);
} 
}; YAHOO.util.AnimMgr = new function() {
    var thread = null; var queue = []; var tweenCount = 0; this.fps = 200; this.delay = 1; this.registerElement = function(tween) {
        if (tween.isAnimated()) { return false; }
        queue[queue.length] = tween; tweenCount += 1; this.start();
    }; this.start = function() { if (thread === null) { thread = setInterval(this.run, this.delay); } }; this.stop = function(tween) {
        if (!tween) {
            clearInterval(thread); for (var i = 0, len = queue.length; i < len; ++i) { if (queue[i].isAnimated()) { queue[i].stop(); } }
            queue = []; thread = null; tweenCount = 0;
        }
        else { tween.stop(); tweenCount -= 1; if (tweenCount <= 0) { this.stop(); } } 
    }; this.run = function() {
        for (var i = 0, len = queue.length; i < len; ++i) {
            var tween = queue[i]; if (!tween || !tween.isAnimated()) { continue; }
            if (tween.currentFrame < tween.totalFrames || tween.totalFrames === null) {
                tween.currentFrame += 1; if (tween.useSeconds) { correctFrame(tween); }
                tween.onTween.fire(); tween._onTween.fire();
            }
            else { YAHOO.util.AnimMgr.stop(tween); } 
        } 
    }; var correctFrame = function(tween) {
        var frames = tween.totalFrames; var frame = tween.currentFrame; var expected = (tween.currentFrame * tween.duration * 1000 / tween.totalFrames); var elapsed = (new Date() - tween.getStartTime()); var tweak = 0; if (elapsed < tween.duration * 1000) { tweak = Math.round((elapsed / expected - 1) * tween.currentFrame); } else { tweak = frames - (frame + 1); }
        if (tweak > 0 && isFinite(tweak)) {
            if (tween.currentFrame + tweak >= frames) { tweak = frames - (frame + 1); }
            tween.currentFrame += tweak;
        } 
    };
}
YAHOO.util.Bezier = new function() {
    this.getPosition = function(points, t) {
        var n = points.length; var tmp = []; for (var i = 0; i < n; ++i) { tmp[i] = [points[i][0], points[i][1]]; }
        for (var j = 1; j < n; ++j) { for (i = 0; i < n - j; ++i) { tmp[i][0] = (1 - t) * tmp[i][0] + t * tmp[parseInt(i + 1, 10)][0]; tmp[i][1] = (1 - t) * tmp[i][1] + t * tmp[parseInt(i + 1, 10)][1]; } }
        return [tmp[0][0], tmp[0][1]];
    };
}; YAHOO.util.Easing = new function() { this.easeNone = function(t, b, c, d) { return b + c * (t /= d); }; this.easeIn = function(t, b, c, d) { return b + c * ((t /= d) * t * t); }; this.easeOut = function(t, b, c, d) { var ts = (t /= d) * t; var tc = ts * t; return b + c * (tc + -3 * ts + 3 * t); }; this.easeBoth = function(t, b, c, d) { var ts = (t /= d) * t; var tc = ts * t; return b + c * (-2 * tc + 3 * ts); }; this.backIn = function(t, b, c, d) { var ts = (t /= d) * t; var tc = ts * t; return b + c * (-3.4005 * tc * ts + 10.2 * ts * ts + -6.2 * tc + 0.4 * ts); }; this.backOut = function(t, b, c, d) { var ts = (t /= d) * t; var tc = ts * t; return b + c * (8.292 * tc * ts + -21.88 * ts * ts + 22.08 * tc + -12.69 * ts + 5.1975 * t); }; this.backBoth = function(t, b, c, d) { var ts = (t /= d) * t; var tc = ts * t; return b + c * (0.402 * tc * ts + -2.1525 * ts * ts + -3.2 * tc + 8 * ts + -2.05 * t); }; }; YAHOO.util.Motion = function(el, attributes, duration, method) { if (el) { this.initMotion(el, attributes, duration, method); } }; YAHOO.util.Motion.prototype = new YAHOO.util.Anim(); YAHOO.util.Motion.prototype.defaultUnits.points = 'px'; YAHOO.util.Motion.prototype.doMethod = function(attribute, start, end) {
    var val = null; if (attribute == 'points') { var translatedPoints = this.getTranslatedPoints(); var t = this.method(this.currentFrame, 0, 100, this.totalFrames) / 100; if (translatedPoints) { val = YAHOO.util.Bezier.getPosition(translatedPoints, t); } } else { val = this.method(this.currentFrame, start, end - start, this.totalFrames); }
    return val;
}; YAHOO.util.Motion.prototype.getAttribute = function(attribute) {
    var val = null; if (attribute == 'points') {
        val = [this.getAttribute('left'), this.getAttribute('top')]; if (isNaN(val[0])) { val[0] = 0; }
        if (isNaN(val[1])) { val[1] = 0; } 
    } else { val = parseFloat(YAHOO.util.Dom.getStyle(this.getEl(), attribute)); }
    return val;
}; YAHOO.util.Motion.prototype.setAttribute = function(attribute, val, unit) { if (attribute == 'points') { YAHOO.util.Dom.setStyle(this.getEl(), 'left', val[0] + unit); YAHOO.util.Dom.setStyle(this.getEl(), 'top', val[1] + unit); } else { YAHOO.util.Dom.setStyle(this.getEl(), attribute, val + unit); } }; YAHOO.util.Motion.prototype.initMotion = function(el, attributes, duration, method) {
    YAHOO.util.Anim.call(this, el, attributes, duration, method); attributes = attributes || {}; attributes.points = attributes.points || {}; attributes.points.control = attributes.points.control || []; this.attributes = attributes; var start; var end = null; var translatedPoints = null; this.getTranslatedPoints = function() { return translatedPoints; }; var translateValues = function(val, self) { var pageXY = YAHOO.util.Dom.getXY(self.getEl()); val = [val[0] - pageXY[0] + start[0], val[1] - pageXY[1] + start[1]]; return val; }; var onStart = function() {
        start = this.getAttribute('points'); var attributes = this.attributes; var control = attributes['points']['control'] || []; if (control.length > 0 && control[0].constructor != Array) { control = [control]; }
        if (YAHOO.util.Dom.getStyle(this.getEl(), 'position') == 'static') { YAHOO.util.Dom.setStyle(this.getEl(), 'position', 'relative'); }
        if (typeof attributes['points']['from'] != 'undefined') { YAHOO.util.Dom.setXY(this.getEl(), attributes['points']['from']); start = this.getAttribute('points'); }
        else if ((start[0] === 0 || start[1] === 0)) { YAHOO.util.Dom.setXY(this.getEl(), YAHOO.util.Dom.getXY(this.getEl())); start = this.getAttribute('points'); }
        var i, len; if (typeof attributes['points']['to'] != 'undefined') { end = translateValues(attributes['points']['to'], this); for (i = 0, len = control.length; i < len; ++i) { control[i] = translateValues(control[i], this); } } else if (typeof attributes['points']['by'] != 'undefined') { end = [start[0] + attributes['points']['by'][0], start[1] + attributes['points']['by'][1]]; for (i = 0, len = control.length; i < len; ++i) { control[i] = [start[0] + control[i][0], start[1] + control[i][1]]; } }
        if (end) {
            translatedPoints = [start]; if (control.length > 0) { translatedPoints = translatedPoints.concat(control); }
            translatedPoints[translatedPoints.length] = end;
        } 
    }; this._onStart.subscribe(onStart);
}; YAHOO.util.Scroll = function(el, attributes, duration, method) { if (el) { YAHOO.util.Anim.call(this, el, attributes, duration, method); } }; YAHOO.util.Scroll.prototype = new YAHOO.util.Anim(); YAHOO.util.Scroll.prototype.defaultUnits.scroll = ' '; YAHOO.util.Scroll.prototype.doMethod = function(attribute, start, end) {
    var val = null; if (attribute == 'scroll') { val = [this.method(this.currentFrame, start[0], end[0] - start[0], this.totalFrames), this.method(this.currentFrame, start[1], end[1] - start[1], this.totalFrames)]; } else { val = this.method(this.currentFrame, start, end - start, this.totalFrames); }
    return val;
}; YAHOO.util.Scroll.prototype.getAttribute = function(attribute) {
    var val = null; var el = this.getEl(); if (attribute == 'scroll') { val = [el.scrollLeft, el.scrollTop]; } else { val = parseFloat(YAHOO.util.Dom.getStyle(el, attribute)); }
    return val;
}; YAHOO.util.Scroll.prototype.setAttribute = function(attribute, val, unit) { var el = this.getEl(); if (attribute == 'scroll') { el.scrollLeft = val[0]; el.scrollTop = val[1]; } else { YAHOO.util.Dom.setStyle(el, attribute, val + unit); } };