Proyectos de Subversion Moodle

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 = {};

Transition._reKeywords = /^(?:node|duration|iterations|easing|delay|on|onstart|onend)$/i;

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);

    }

    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;

};

var _wrapCallBack = function(anim, fn, callback) {

    return function() {

        if (fn) {

            fn.call(anim);

        }

        if (callback && typeof callback === 'function') {

            callback.apply(anim._node, arguments);

        }

    };

};

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 {

        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"]});