/**
* 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);
}
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;
};
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 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']
});