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Diffstat (limited to 'node_modules/react-dom/lib/SyntheticEvent.js')
-rw-r--r-- | node_modules/react-dom/lib/SyntheticEvent.js | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/node_modules/react-dom/lib/SyntheticEvent.js b/node_modules/react-dom/lib/SyntheticEvent.js deleted file mode 100644 index 61d869bb1..000000000 --- a/node_modules/react-dom/lib/SyntheticEvent.js +++ /dev/null @@ -1,265 +0,0 @@ -/** - * Copyright 2013-present, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under the BSD-style license found in the - * LICENSE file in the root directory of this source tree. An additional grant - * of patent rights can be found in the PATENTS file in the same directory. - * - */ - -'use strict'; - -var _assign = require('object-assign'); - -var PooledClass = require('./PooledClass'); - -var emptyFunction = require('fbjs/lib/emptyFunction'); -var warning = require('fbjs/lib/warning'); - -var didWarnForAddedNewProperty = false; -var isProxySupported = typeof Proxy === 'function'; - -var shouldBeReleasedProperties = ['dispatchConfig', '_targetInst', 'nativeEvent', 'isDefaultPrevented', 'isPropagationStopped', '_dispatchListeners', '_dispatchInstances']; - -/** - * @interface Event - * @see http://www.w3.org/TR/DOM-Level-3-Events/ - */ -var EventInterface = { - type: null, - target: null, - // currentTarget is set when dispatching; no use in copying it here - currentTarget: emptyFunction.thatReturnsNull, - eventPhase: null, - bubbles: null, - cancelable: null, - timeStamp: function (event) { - return event.timeStamp || Date.now(); - }, - defaultPrevented: null, - isTrusted: null -}; - -/** - * Synthetic events are dispatched by event plugins, typically in response to a - * top-level event delegation handler. - * - * These systems should generally use pooling to reduce the frequency of garbage - * collection. The system should check `isPersistent` to determine whether the - * event should be released into the pool after being dispatched. Users that - * need a persisted event should invoke `persist`. - * - * Synthetic events (and subclasses) implement the DOM Level 3 Events API by - * normalizing browser quirks. Subclasses do not necessarily have to implement a - * DOM interface; custom application-specific events can also subclass this. - * - * @param {object} dispatchConfig Configuration used to dispatch this event. - * @param {*} targetInst Marker identifying the event target. - * @param {object} nativeEvent Native browser event. - * @param {DOMEventTarget} nativeEventTarget Target node. - */ -function SyntheticEvent(dispatchConfig, targetInst, nativeEvent, nativeEventTarget) { - if (process.env.NODE_ENV !== 'production') { - // these have a getter/setter for warnings - delete this.nativeEvent; - delete this.preventDefault; - delete this.stopPropagation; - } - - this.dispatchConfig = dispatchConfig; - this._targetInst = targetInst; - this.nativeEvent = nativeEvent; - - var Interface = this.constructor.Interface; - for (var propName in Interface) { - if (!Interface.hasOwnProperty(propName)) { - continue; - } - if (process.env.NODE_ENV !== 'production') { - delete this[propName]; // this has a getter/setter for warnings - } - 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; - return this; -} - -_assign(SyntheticEvent.prototype, { - preventDefault: function () { - this.defaultPrevented = true; - var event = this.nativeEvent; - if (!event) { - return; - } - - if (event.preventDefault) { - event.preventDefault(); - // eslint-disable-next-line valid-typeof - } else if (typeof event.returnValue !== 'unknown') { - event.returnValue = false; - } - this.isDefaultPrevented = emptyFunction.thatReturnsTrue; - }, - - stopPropagation: function () { - var event = this.nativeEvent; - if (!event) { - return; - } - - if (event.stopPropagation) { - event.stopPropagation(); - // eslint-disable-next-line valid-typeof - } else if (typeof event.cancelBubble !== 'unknown') { - // The ChangeEventPlugin registers a "propertychange" event for - // IE. This event does not support bubbling or cancelling, and - // any references to cancelBubble throw "Member not found". A - // typeof check of "unknown" circumvents this issue (and is also - // IE specific). - event.cancelBubble = true; - } - - this.isPropagationStopped = emptyFunction.thatReturnsTrue; - }, - - /** - * We release all dispatched `SyntheticEvent`s after each event loop, adding - * them back into the pool. This allows a way to hold onto a reference that - * won't be added back into the pool. - */ - persist: function () { - this.isPersistent = emptyFunction.thatReturnsTrue; - }, - - /** - * Checks if this event should be released back into the pool. - * - * @return {boolean} True if this should not be released, false otherwise. - */ - isPersistent: emptyFunction.thatReturnsFalse, - - /** - * `PooledClass` looks for `destructor` on each instance it releases. - */ - destructor: function () { - var Interface = this.constructor.Interface; - for (var propName in Interface) { - if (process.env.NODE_ENV !== 'production') { - Object.defineProperty(this, propName, getPooledWarningPropertyDefinition(propName, Interface[propName])); - } else { - this[propName] = null; - } - } - for (var i = 0; i < shouldBeReleasedProperties.length; i++) { - this[shouldBeReleasedProperties[i]] = null; - } - if (process.env.NODE_ENV !== 'production') { - Object.defineProperty(this, 'nativeEvent', getPooledWarningPropertyDefinition('nativeEvent', null)); - Object.defineProperty(this, 'preventDefault', getPooledWarningPropertyDefinition('preventDefault', emptyFunction)); - Object.defineProperty(this, 'stopPropagation', getPooledWarningPropertyDefinition('stopPropagation', emptyFunction)); - } - } -}); - -SyntheticEvent.Interface = EventInterface; - -if (process.env.NODE_ENV !== 'production') { - if (isProxySupported) { - /*eslint-disable no-func-assign */ - SyntheticEvent = new Proxy(SyntheticEvent, { - construct: function (target, args) { - return this.apply(target, Object.create(target.prototype), args); - }, - apply: function (constructor, that, args) { - return new Proxy(constructor.apply(that, args), { - set: function (target, prop, value) { - if (prop !== 'isPersistent' && !target.constructor.Interface.hasOwnProperty(prop) && shouldBeReleasedProperties.indexOf(prop) === -1) { - process.env.NODE_ENV !== 'production' ? warning(didWarnForAddedNewProperty || target.isPersistent(), "This synthetic event is reused for performance reasons. If you're " + "seeing this, you're adding a new property in the synthetic event object. " + 'The property is never released. See ' + 'https://fb.me/react-event-pooling for more information.') : void 0; - didWarnForAddedNewProperty = true; - } - target[prop] = value; - return true; - } - }); - } - }); - /*eslint-enable no-func-assign */ - } -} -/** - * Helper to reduce boilerplate when creating subclasses. - * - * @param {function} Class - * @param {?object} Interface - */ -SyntheticEvent.augmentClass = function (Class, Interface) { - var Super = this; - - var E = function () {}; - E.prototype = Super.prototype; - var prototype = new E(); - - _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; - -/** - * Helper to nullify syntheticEvent instance properties when destructing - * - * @param {object} SyntheticEvent - * @param {String} propName - * @return {object} defineProperty object - */ -function getPooledWarningPropertyDefinition(propName, getVal) { - var isFunction = typeof getVal === 'function'; - return { - configurable: true, - set: set, - get: get - }; - - function set(val) { - var action = isFunction ? 'setting the method' : 'setting the property'; - warn(action, 'This is effectively a no-op'); - return val; - } - - function get() { - var action = isFunction ? 'accessing the method' : 'accessing the property'; - var result = isFunction ? 'This is a no-op function' : 'This is set to null'; - warn(action, result); - return getVal; - } - - function warn(action, result) { - var warningCondition = false; - process.env.NODE_ENV !== 'production' ? warning(warningCondition, "This synthetic event is reused for performance reasons. If you're seeing this, " + "you're %s `%s` on a released/nullified synthetic event. %s. " + 'If you must keep the original synthetic event around, use event.persist(). ' + 'See https://fb.me/react-event-pooling for more information.', action, propName, result) : void 0; - } -}
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