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YUI.add('transition', function (Y, NAME) {

/**
* Provides the transition method for Node.
* Transition has no API of its own, but adds the transition method to Node.
*
* @module transition
* @requires node-style
*/

var CAMEL_VENDOR_PREFIX = '',
    VENDOR_PREFIX = '',
    DOCUMENT = Y.config.doc,
    DOCUMENT_ELEMENT = 'documentElement',
    DOCUMENT_STYLE = DOCUMENT[DOCUMENT_ELEMENT].style,
    TRANSITION_CAMEL = 'transition',
    TRANSITION_PROPERTY_CAMEL = 'transitionProperty',
    TRANSITION_PROPERTY,
    TRANSITION_DURATION,
    TRANSITION_TIMING_FUNCTION,
    TRANSITION_DELAY,
    TRANSITION_END,
    ON_TRANSITION_END,

EMPTY_OBJ = {},

VENDORS = [
        'Webkit',
        'Moz'
    ],

VENDOR_TRANSITION_END = {
        Webkit: 'webkitTransitionEnd'
    },

/**
 * A class for constructing transition instances.
 * Adds the "transition" method to Node.
 * @class Transition
 * @constructor
 */

Transition = function() {
    this.init.apply(this, arguments);
};

// One off handling of transform-prefixing.
Transition._TRANSFORM = 'transform';

Transition._toCamel = function(property) {
    property = property.replace(/-([a-z])/gi, function(m0, m1) {
        return m1.toUpperCase();
    });

return property;
};

Transition._toHyphen = function(property) {
    property = property.replace(/([A-Z]?)([a-z]+)([A-Z]?)/g, function(m0, m1, m2, m3) {
        var str = ((m1) ? '-' + m1.toLowerCase() : '') + m2;

if (m3) {
            str += '-' + m3.toLowerCase();
        }

return str;
    });

return property;
};

Transition.SHOW_TRANSITION = 'fadeIn';
Transition.HIDE_TRANSITION = 'fadeOut';

Transition.useNative = false;

// Map transition properties to vendor-specific versions.
if ('transition' in DOCUMENT_STYLE
    && 'transitionProperty' in DOCUMENT_STYLE
    && 'transitionDuration' in DOCUMENT_STYLE
    && 'transitionTimingFunction' in DOCUMENT_STYLE
    && 'transitionDelay' in DOCUMENT_STYLE) {
    Transition.useNative = true;
    Transition.supported = true; // TODO: remove
} else {
    Y.Array.each(VENDORS, function(val) { // then vendor specific
        var property = val + 'Transition';
        if (property in DOCUMENT[DOCUMENT_ELEMENT].style) {
            CAMEL_VENDOR_PREFIX = val;
            VENDOR_PREFIX       = Transition._toHyphen(val) + '-';

Transition.useNative = true;
            Transition.supported = true; // TODO: remove
            Transition._VENDOR_PREFIX = val;
        }
    });
}

// Map transform property to vendor-specific versions.
// One-off required for cssText injection.
if (typeof DOCUMENT_STYLE.transform === 'undefined') {
    Y.Array.each(VENDORS, function(val) { // then vendor specific
        var property = val + 'Transform';
        if (typeof DOCUMENT_STYLE[property] !== 'undefined') {
            Transition._TRANSFORM = property;
        }
    });
}

if (CAMEL_VENDOR_PREFIX) {
    TRANSITION_CAMEL          = CAMEL_VENDOR_PREFIX + 'Transition';
    TRANSITION_PROPERTY_CAMEL = CAMEL_VENDOR_PREFIX + 'TransitionProperty';
}

TRANSITION_PROPERTY        = VENDOR_PREFIX + 'transition-property';
TRANSITION_DURATION        = VENDOR_PREFIX + 'transition-duration';
TRANSITION_TIMING_FUNCTION = VENDOR_PREFIX + 'transition-timing-function';
TRANSITION_DELAY           = VENDOR_PREFIX + 'transition-delay';

TRANSITION_END    = 'transitionend';
ON_TRANSITION_END = 'on' + CAMEL_VENDOR_PREFIX.toLowerCase() + 'transitionend';
TRANSITION_END    = VENDOR_TRANSITION_END[CAMEL_VENDOR_PREFIX] || TRANSITION_END;

Transition.fx = {};
Transition.toggles = {};

Transition._hasEnd = {};

Y.Node.DOM_EVENTS[TRANSITION_END] = 1;

Transition.NAME = 'transition';

Transition.DEFAULT_EASING = 'ease';
Transition.DEFAULT_DURATION = 0.5;
Transition.DEFAULT_DELAY = 0;

Transition._nodeAttrs = {};

Transition.prototype = {
    constructor: Transition,
    init: function(node, config) {
        var anim = this;
        anim._node = node;
        if (!anim._running && config) {
            anim._config = config;
            node._transition = anim; // cache for reuse

anim._duration = ('duration' in config) ?
                config.duration: anim.constructor.DEFAULT_DURATION;

anim._delay = ('delay' in config) ?
                config.delay: anim.constructor.DEFAULT_DELAY;

anim._easing = config.easing || anim.constructor.DEFAULT_EASING;
            anim._count = 0; // track number of animated properties
            anim._running = false;

}

return anim;
    },

addProperty: function(prop, config) {
        var anim = this,
            node = this._node,
            uid = Y.stamp(node),
            nodeInstance = Y.one(node),
            attrs = Transition._nodeAttrs[uid],
            computed,
            compareVal,
            dur,
            attr,
            val;

if (!attrs) {
            attrs = Transition._nodeAttrs[uid] = {};
        }

attr = attrs[prop];

// might just be a value
        if (config && config.value !== undefined) {
            val = config.value;
        } else if (config !== undefined) {
            val = config;
            config = EMPTY_OBJ;
        }

if (typeof val === 'function') {
            val = val.call(nodeInstance, nodeInstance);
        }

if (attr && attr.transition) {
            // take control if another transition owns this property
            if (attr.transition !== anim) {
                attr.transition._count--; // remapping attr to this transition
            }
        }

anim._count++; // properties per transition

// make 0 async and fire events
        dur = ((typeof config.duration !== 'undefined') ? config.duration :
                    anim._duration) || 0.0001;

attrs[prop] = {
            value: val,
            duration: dur,
            delay: (typeof config.delay !== 'undefined') ? config.delay :
                    anim._delay,

easing: config.easing || anim._easing,

transition: anim
        };

// native end event doesnt fire when setting to same value
        // supplementing with timer
        // val may be a string or number (height: 0, etc), but computedStyle is always string
        computed = Y.DOM.getComputedStyle(node, prop);
        compareVal = (typeof val === 'string') ? computed : parseFloat(computed);

if (Transition.useNative && compareVal === val) {
            setTimeout(function() {
                anim._onNativeEnd.call(node, {
                    propertyName: prop,
                    elapsedTime: dur
                });
            }, dur * 1000);
        }
    },

removeProperty: function(prop) {
        var anim = this,
            attrs = Transition._nodeAttrs[Y.stamp(anim._node)];

if (attrs && attrs[prop]) {
            delete attrs[prop];
            anim._count--;
        }

initAttrs: function(config) {
        var attr,
            node = this._node;

if (config.transform && !config[Transition._TRANSFORM]) {
            config[Transition._TRANSFORM] = config.transform;
            delete config.transform; // TODO: copy
        }

for (attr in config) {
            if (config.hasOwnProperty(attr) && !Transition._reKeywords.test(attr)) {
                this.addProperty(attr, config[attr]);

// when size is auto or % webkit starts from zero instead of computed
                // (https://bugs.webkit.org/show_bug.cgi?id=16020)
                // TODO: selective set
                if (node.style[attr] === '') {
                    Y.DOM.setStyle(node, attr, Y.DOM.getComputedStyle(node, attr));
                }
            }
        }
    },

/**
     * Starts or an animation.
     * @method run
     * @chainable
     * @private
     */
    run: function(callback) {
        var anim = this,
            node = anim._node,
            config = anim._config,
            data = {
                type: 'transition:start',
                config: config
            };

if (!anim._running) {
            anim._running = true;

if (config.on && config.on.start) {
                config.on.start.call(Y.one(node), data);
            }

anim.initAttrs(anim._config);

anim._callback = callback;
            anim._start();
        }

return anim;
    },

_start: function() {
        this._runNative();
    },

_prepDur: function(dur) {
        dur = parseFloat(dur) * 1000;

return dur + 'ms';
    },

_runNative: function() {
        var anim = this,
            node = anim._node,
            uid = Y.stamp(node),
            style = node.style,
            computed = node.ownerDocument.defaultView.getComputedStyle(node),
            attrs = Transition._nodeAttrs[uid],
            cssText = '',
            cssTransition = computed[Transition._toCamel(TRANSITION_PROPERTY)],

transitionText = TRANSITION_PROPERTY + ': ',
            duration = TRANSITION_DURATION + ': ',
            easing = TRANSITION_TIMING_FUNCTION + ': ',
            delay = TRANSITION_DELAY + ': ',
            hyphy,
            attr,
            name;

// preserve existing transitions
        if (cssTransition !== 'all') {
            transitionText += cssTransition + ',';
            duration += computed[Transition._toCamel(TRANSITION_DURATION)] + ',';
            easing += computed[Transition._toCamel(TRANSITION_TIMING_FUNCTION)] + ',';
            delay += computed[Transition._toCamel(TRANSITION_DELAY)] + ',';

}

// run transitions mapped to this instance
        for (name in attrs) {
            hyphy = Transition._toHyphen(name);
            attr = attrs[name];
            if ((attr = attrs[name]) && attr.transition === anim) {
                if (name in node.style) { // only native styles allowed
                    duration += anim._prepDur(attr.duration) + ',';
                    delay += anim._prepDur(attr.delay) + ',';
                    easing += (attr.easing) + ',';

transitionText += hyphy + ',';
                    cssText += hyphy + ': ' + attr.value + '; ';
                } else {
                    this.removeProperty(name);
                }
            }
        }

transitionText = transitionText.replace(/,$/, ';');
        duration = duration.replace(/,$/, ';');
        easing = easing.replace(/,$/, ';');
        delay = delay.replace(/,$/, ';');

// only one native end event per node
        if (!Transition._hasEnd[uid]) {
            node.addEventListener(TRANSITION_END, anim._onNativeEnd, '');
            Transition._hasEnd[uid] = true;

}

style.cssText += transitionText + duration + easing + delay + cssText;

_end: function(elapsed) {
        var anim = this,
            node = anim._node,
            callback = anim._callback,
            config = anim._config,
            data = {
                type: 'transition:end',
                config: config,
                elapsedTime: elapsed
            },

nodeInstance = Y.one(node);

anim._running = false;
        anim._callback = null;

if (node) {
            if (config.on && config.on.end) {
                setTimeout(function() { // IE: allow previous update to finish
                    config.on.end.call(nodeInstance, data);

// nested to ensure proper fire order
                    if (callback) {
                        callback.call(nodeInstance, data);
                    }

}, 1);
            } else if (callback) {
                setTimeout(function() { // IE: allow previous update to finish
                    callback.call(nodeInstance, data);
                }, 1);
            }
        }

_endNative: function(name) {
        var node = this._node,
            value = node.ownerDocument.defaultView.getComputedStyle(node, '')[Transition._toCamel(TRANSITION_PROPERTY)];

name = Transition._toHyphen(name);
        if (typeof value === 'string') {
            value = value.replace(new RegExp('(?:^|,\\s)' + name + ',?'), ',');
            value = value.replace(/^,|,$/, '');
            node.style[TRANSITION_CAMEL] = value;
        }
    },

_onNativeEnd: function(e) {
        var node = this,
            uid = Y.stamp(node),
            event = e,//e._event,
            name = Transition._toCamel(event.propertyName),
            elapsed = event.elapsedTime,
            attrs = Transition._nodeAttrs[uid],
            attr = attrs[name],
            anim = (attr) ? attr.transition : null,
            data,
            config;

if (anim) {
            anim.removeProperty(name);
            anim._endNative(name);
            config = anim._config[name];

data = {
                type: 'propertyEnd',
                propertyName: name,
                elapsedTime: elapsed,
                config: config
            };

if (config && config.on && config.on.end) {
                config.on.end.call(Y.one(node), data);
            }

if (anim._count <= 0)  { // after propertyEnd fires
                anim._end(elapsed);
                node.style[TRANSITION_PROPERTY_CAMEL] = ''; // clean up style
            }
        }
    },

destroy: function() {
        var anim = this,
            node = anim._node;

if (node) {
            node.removeEventListener(TRANSITION_END, anim._onNativeEnd, false);
            anim._node = null;
        }
    }
};

Y.Transition = Transition;
Y.TransitionNative = Transition; // TODO: remove

/**
 *   Animate one or more css properties to a given value. Requires the "transition" module.
 *   <pre>example usage:
 *       Y.one('#demo').transition({
 *           duration: 1, // in seconds, default is 0.5
 *           easing: 'ease-out', // default is 'ease'
 *           delay: '1', // delay start for 1 second, default is 0
 *
 *           height: '10px',
 *           width: '10px',
 *
 *           opacity: { // per property
 *               value: 0,
 *               duration: 2,
 *               delay: 2,
 *               easing: 'ease-in'
 *           }
 *       });
 *   </pre>
 *   @for Node
 *   @method transition
 *   @param {Object} config An object containing one or more style properties, a duration and an easing.
 *   @param {Function} callback A function to run after the transition has completed.
 *   @chainable
*/
Y.Node.prototype.transition = function(name, config, callback) {
    var
        transitionAttrs = Transition._nodeAttrs[Y.stamp(this._node)],
        anim = (transitionAttrs) ? transitionAttrs.transition || null : null,
        fxConfig,
        prop;

if (typeof name === 'string') { // named effect, pull config from registry
        if (typeof config === 'function') {
            callback = config;
            config = null;
        }

fxConfig = Transition.fx[name];

if (config && typeof config === 'object') {
            config = Y.clone(config);

for (prop in fxConfig) {
                if (fxConfig.hasOwnProperty(prop)) {
                    if (! (prop in config)) {
                        config[prop] = fxConfig[prop];
                    }
                }
            }
        } else {
            config = fxConfig;
        }

} else { // name is a config, config is a callback or undefined
        callback = config;
        config = name;
    }

if (anim && !anim._running) {
        anim.init(this, config);
    } else {
        anim = new Transition(this._node, config);
    }

anim.run(callback);
    return this;
};

Y.Node.prototype.show = function(name, config, callback) {
    this._show(); // show prior to transition
    if (name && Y.Transition) {
        if (typeof name !== 'string' && !name.push) { // named effect or array of effects supercedes default
            if (typeof config === 'function') {
                callback = config;
                config = name;
            }
            name = Transition.SHOW_TRANSITION;
        }
        this.transition(name, config, callback);
    }
    else if (name && !Y.Transition) { Y.log('unable to transition show; missing transition module', 'warn', 'node'); }
    return this;
};

Y.NodeList.prototype.show = function(name, config, callback) {
    var nodes = this._nodes,
        i = 0,
        node;

while ((node = nodes[i++])) {
        Y.one(node).show(name, config, callback);
    }

return this;
};

Y.Node.prototype.hide = function(name, config, callback) {
    if (name && Y.Transition) {
        if (typeof config === 'function') {
            callback = config;
            config = null;
        }

callback = _wrapCallBack(this, this._hide, callback); // wrap with existing callback
        if (typeof name !== 'string' && !name.push) { // named effect or array of effects supercedes default
            if (typeof config === 'function') {
                callback = config;
                config = name;
            }
            name = Transition.HIDE_TRANSITION;
        }
        this.transition(name, config, callback);
    } else if (name && !Y.Transition) { Y.log('unable to transition hide; missing transition module', 'warn', 'node');
    } else {
        this._hide();
    }
    return this;
};

Y.NodeList.prototype.hide = function(name, config, callback) {
    var nodes = this._nodes,
        i = 0,
        node;

while ((node = nodes[i++])) {
        Y.one(node).hide(name, config, callback);
    }

return this;
};

/**
 *   Animate one or more css properties to a given value. Requires the "transition" module.
 *   <pre>example usage:
 *       Y.all('.demo').transition({
 *           duration: 1, // in seconds, default is 0.5
 *           easing: 'ease-out', // default is 'ease'
 *           delay: '1', // delay start for 1 second, default is 0
 *
 *           height: '10px',
 *           width: '10px',
 *
 *           opacity: { // per property
 *               value: 0,
 *               duration: 2,
 *               delay: 2,
 *               easing: 'ease-in'
 *           }
 *       });
 *   </pre>
 *   @for NodeList
 *   @method transition
 *   @param {Object} config An object containing one or more style properties, a duration and an easing.
 *   @param {Function} callback A function to run after the transition has completed. The callback fires
 *       once per item in the NodeList.
 *   @param {Boolean} callbackOnce If true, the callback will be called only after the
 *       last transition has completed
 *   @chainable
*/
Y.NodeList.prototype.transition = function(config, callback, callbackOnce) {
    var nodes = this._nodes,
        size = this.size(),
         i = 0,
        callbackOnce = callbackOnce === true,
        node;

while ((node = nodes[i++])) {
        if (i < size && callbackOnce){
            Y.one(node).transition(config);
        } else {
            Y.one(node).transition(config, callback);
        }
    }

return this;
};

Y.Node.prototype.toggleView = function(name, on, callback) {
    this._toggles = this._toggles || [];
    callback = arguments[arguments.length - 1];

if (typeof name !== 'string') { // no transition, just toggle
        on = name;
        this._toggleView(on, callback); // call original _toggleView in Y.Node
        return;
    }

if (typeof on === 'function') { // Ignore "on" if used for callback argument.
        on = undefined;
    }

if (typeof on === 'undefined' && name in this._toggles) { // reverse current toggle
        on = ! this._toggles[name];
    }

on = (on) ? 1 : 0;
    if (on) {
        this._show();
    }  else {
        callback = _wrapCallBack(this, this._hide, callback);
    }

this._toggles[name] = on;
    this.transition(Y.Transition.toggles[name][on], callback);

return this;
};

Y.NodeList.prototype.toggleView = function(name, on, callback) {
    var nodes = this._nodes,
        i = 0,
        node;

while ((node = nodes[i++])) {
        node = Y.one(node);
        node.toggleView.apply(node, arguments);
    }

return this;
};

Y.mix(Transition.fx, {
    fadeOut: {
        opacity: 0,
        duration: 0.5,
        easing: 'ease-out'
    },

fadeIn: {
        opacity: 1,
        duration: 0.5,
        easing: 'ease-in'
    },

sizeOut: {
        height: 0,
        width: 0,
        duration: 0.75,
        easing: 'ease-out'
    },

sizeIn: {
        height: function(node) {
            return node.get('scrollHeight') + 'px';
        },
        width: function(node) {
            return node.get('scrollWidth') + 'px';
        },
        duration: 0.5,
        easing: 'ease-in',

on: {
            start: function() {
                var overflow = this.getStyle('overflow');
                if (overflow !== 'hidden') { // enable scrollHeight/Width
                    this.setStyle('overflow', 'hidden');
                    this._transitionOverflow = overflow;
                }
            },

end: function() {
                if (this._transitionOverflow) { // revert overridden value
                    this.setStyle('overflow', this._transitionOverflow);
                    delete this._transitionOverflow;
                }
            }
        }
    }
});

Y.mix(Transition.toggles, {
    size: ['sizeOut', 'sizeIn'],
    fade: ['fadeOut', 'fadeIn']
});

}, '3.18.1', {"requires": ["node-style"]});

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