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SyntheticEvent.js
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SyntheticEvent.js
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/* */
(function(process) {
'use strict';
var PooledClass = require('./PooledClass');
var assign = require('./Object.assign');
var emptyFunction = require('fbjs/lib/emptyFunction');
var warning = require('fbjs/lib/warning');
var EventInterface = {
type: null,
target: null,
currentTarget: emptyFunction.thatReturnsNull,
eventPhase: null,
bubbles: null,
cancelable: null,
timeStamp: function(event) {
return event.timeStamp || Date.now();
},
defaultPrevented: null,
isTrusted: null
};
function SyntheticEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
this.dispatchConfig = dispatchConfig;
this.dispatchMarker = dispatchMarker;
this.nativeEvent = nativeEvent;
var Interface = this.constructor.Interface;
for (var propName in Interface) {
if (!Interface.hasOwnProperty(propName)) {
continue;
}
var normalize = Interface[propName];
if (normalize) {
this[propName] = normalize(nativeEvent);
} else {
if (propName === 'target') {
this.target = nativeEventTarget;
} else {
this[propName] = nativeEvent[propName];
}
}
}
var defaultPrevented = nativeEvent.defaultPrevented != null ? nativeEvent.defaultPrevented : nativeEvent.returnValue === false;
if (defaultPrevented) {
this.isDefaultPrevented = emptyFunction.thatReturnsTrue;
} else {
this.isDefaultPrevented = emptyFunction.thatReturnsFalse;
}
this.isPropagationStopped = emptyFunction.thatReturnsFalse;
}
assign(SyntheticEvent.prototype, {
preventDefault: function() {
this.defaultPrevented = true;
var event = this.nativeEvent;
if (process.env.NODE_ENV !== 'production') {
process.env.NODE_ENV !== 'production' ? warning(event, 'This synthetic event is reused for performance reasons. If you\'re ' + 'seeing this, you\'re calling `preventDefault` on a ' + 'released/nullified synthetic event. This is a no-op. See ' + 'https://fb.me/react-event-pooling for more information.') : undefined;
}
if (!event) {
return;
}
if (event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
this.isDefaultPrevented = emptyFunction.thatReturnsTrue;
},
stopPropagation: function() {
var event = this.nativeEvent;
if (process.env.NODE_ENV !== 'production') {
process.env.NODE_ENV !== 'production' ? warning(event, 'This synthetic event is reused for performance reasons. If you\'re ' + 'seeing this, you\'re calling `stopPropagation` on a ' + 'released/nullified synthetic event. This is a no-op. See ' + 'https://fb.me/react-event-pooling for more information.') : undefined;
}
if (!event) {
return;
}
if (event.stopPropagation) {
event.stopPropagation();
} else {
event.cancelBubble = true;
}
this.isPropagationStopped = emptyFunction.thatReturnsTrue;
},
persist: function() {
this.isPersistent = emptyFunction.thatReturnsTrue;
},
isPersistent: emptyFunction.thatReturnsFalse,
destructor: function() {
var Interface = this.constructor.Interface;
for (var propName in Interface) {
this[propName] = null;
}
this.dispatchConfig = null;
this.dispatchMarker = null;
this.nativeEvent = null;
}
});
SyntheticEvent.Interface = EventInterface;
SyntheticEvent.augmentClass = function(Class, Interface) {
var Super = this;
var prototype = Object.create(Super.prototype);
assign(prototype, Class.prototype);
Class.prototype = prototype;
Class.prototype.constructor = Class;
Class.Interface = assign({}, Super.Interface, Interface);
Class.augmentClass = Super.augmentClass;
PooledClass.addPoolingTo(Class, PooledClass.fourArgumentPooler);
};
PooledClass.addPoolingTo(SyntheticEvent, PooledClass.fourArgumentPooler);
module.exports = SyntheticEvent;
})(require('process'));