node_modules

1 files changed, 267 insertions, 0 deletions

diff --git a/node_modules/react-dom/lib/SyntheticEvent.js b/node_modules/react-dom/lib/SyntheticEvent.js
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+/**
+ * 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();
+    } else if (typeof event.returnValue !== 'unknown') {
+      // eslint-disable-line valid-typeof
+      event.returnValue = false;
+    }
+    this.isDefaultPrevented = emptyFunction.thatReturnsTrue;
+  },
+
+  stopPropagation: function () {
+    var event = this.nativeEvent;
+    if (!event) {
+      return;
+    }
+
+    if (event.stopPropagation) {
+      event.stopPropagation();
+    } else if (typeof event.cancelBubble !== 'unknown') {
+      // eslint-disable-line valid-typeof
+      // 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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