252 lines
9.5 KiB
JavaScript
252 lines
9.5 KiB
JavaScript
/**
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* Copyright 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*
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*/
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'use strict';
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var _prodInvariant = require('./reactProdInvariant');
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var invariant = require('fbjs/lib/invariant');
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/**
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* Injectable ordering of event plugins.
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*/
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var eventPluginOrder = null;
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/**
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* Injectable mapping from names to event plugin modules.
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*/
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var namesToPlugins = {};
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/**
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* Recomputes the plugin list using the injected plugins and plugin ordering.
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*
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* @private
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*/
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function recomputePluginOrdering() {
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if (!eventPluginOrder) {
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// Wait until an `eventPluginOrder` is injected.
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return;
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}
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for (var pluginName in namesToPlugins) {
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var pluginModule = namesToPlugins[pluginName];
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var pluginIndex = eventPluginOrder.indexOf(pluginName);
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!(pluginIndex > -1) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `%s`.', pluginName) : _prodInvariant('96', pluginName) : void 0;
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if (EventPluginRegistry.plugins[pluginIndex]) {
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continue;
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}
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!pluginModule.extractEvents ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `%s` does not.', pluginName) : _prodInvariant('97', pluginName) : void 0;
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EventPluginRegistry.plugins[pluginIndex] = pluginModule;
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var publishedEvents = pluginModule.eventTypes;
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for (var eventName in publishedEvents) {
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!publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Failed to publish event `%s` for plugin `%s`.', eventName, pluginName) : _prodInvariant('98', eventName, pluginName) : void 0;
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}
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}
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}
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/**
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* Publishes an event so that it can be dispatched by the supplied plugin.
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*
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* @param {object} dispatchConfig Dispatch configuration for the event.
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* @param {object} PluginModule Plugin publishing the event.
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* @return {boolean} True if the event was successfully published.
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* @private
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*/
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function publishEventForPlugin(dispatchConfig, pluginModule, eventName) {
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!!EventPluginRegistry.eventNameDispatchConfigs.hasOwnProperty(eventName) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same event name, `%s`.', eventName) : _prodInvariant('99', eventName) : void 0;
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EventPluginRegistry.eventNameDispatchConfigs[eventName] = dispatchConfig;
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var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;
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if (phasedRegistrationNames) {
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for (var phaseName in phasedRegistrationNames) {
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if (phasedRegistrationNames.hasOwnProperty(phaseName)) {
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var phasedRegistrationName = phasedRegistrationNames[phaseName];
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publishRegistrationName(phasedRegistrationName, pluginModule, eventName);
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}
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}
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return true;
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} else if (dispatchConfig.registrationName) {
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publishRegistrationName(dispatchConfig.registrationName, pluginModule, eventName);
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return true;
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}
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return false;
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}
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/**
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* Publishes a registration name that is used to identify dispatched events and
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* can be used with `EventPluginHub.putListener` to register listeners.
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*
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* @param {string} registrationName Registration name to add.
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* @param {object} PluginModule Plugin publishing the event.
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* @private
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*/
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function publishRegistrationName(registrationName, pluginModule, eventName) {
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!!EventPluginRegistry.registrationNameModules[registrationName] ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same registration name, `%s`.', registrationName) : _prodInvariant('100', registrationName) : void 0;
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EventPluginRegistry.registrationNameModules[registrationName] = pluginModule;
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EventPluginRegistry.registrationNameDependencies[registrationName] = pluginModule.eventTypes[eventName].dependencies;
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if (process.env.NODE_ENV !== 'production') {
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var lowerCasedName = registrationName.toLowerCase();
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EventPluginRegistry.possibleRegistrationNames[lowerCasedName] = registrationName;
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if (registrationName === 'onDoubleClick') {
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EventPluginRegistry.possibleRegistrationNames.ondblclick = registrationName;
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}
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}
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}
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/**
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* Registers plugins so that they can extract and dispatch events.
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*
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* @see {EventPluginHub}
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*/
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var EventPluginRegistry = {
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/**
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* Ordered list of injected plugins.
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*/
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plugins: [],
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/**
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* Mapping from event name to dispatch config
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*/
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eventNameDispatchConfigs: {},
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/**
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* Mapping from registration name to plugin module
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*/
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registrationNameModules: {},
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/**
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* Mapping from registration name to event name
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*/
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registrationNameDependencies: {},
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/**
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* Mapping from lowercase registration names to the properly cased version,
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* used to warn in the case of missing event handlers. Available
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* only in __DEV__.
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* @type {Object}
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*/
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possibleRegistrationNames: process.env.NODE_ENV !== 'production' ? {} : null,
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// Trust the developer to only use possibleRegistrationNames in __DEV__
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/**
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* Injects an ordering of plugins (by plugin name). This allows the ordering
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* to be decoupled from injection of the actual plugins so that ordering is
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* always deterministic regardless of packaging, on-the-fly injection, etc.
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*
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* @param {array} InjectedEventPluginOrder
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* @internal
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* @see {EventPluginHub.injection.injectEventPluginOrder}
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*/
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injectEventPluginOrder: function (injectedEventPluginOrder) {
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!!eventPluginOrder ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Cannot inject event plugin ordering more than once. You are likely trying to load more than one copy of React.') : _prodInvariant('101') : void 0;
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// Clone the ordering so it cannot be dynamically mutated.
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eventPluginOrder = Array.prototype.slice.call(injectedEventPluginOrder);
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recomputePluginOrdering();
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},
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/**
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* Injects plugins to be used by `EventPluginHub`. The plugin names must be
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* in the ordering injected by `injectEventPluginOrder`.
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*
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* Plugins can be injected as part of page initialization or on-the-fly.
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*
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* @param {object} injectedNamesToPlugins Map from names to plugin modules.
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* @internal
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* @see {EventPluginHub.injection.injectEventPluginsByName}
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*/
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injectEventPluginsByName: function (injectedNamesToPlugins) {
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var isOrderingDirty = false;
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for (var pluginName in injectedNamesToPlugins) {
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if (!injectedNamesToPlugins.hasOwnProperty(pluginName)) {
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continue;
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}
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var pluginModule = injectedNamesToPlugins[pluginName];
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if (!namesToPlugins.hasOwnProperty(pluginName) || namesToPlugins[pluginName] !== pluginModule) {
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!!namesToPlugins[pluginName] ? process.env.NODE_ENV !== 'production' ? invariant(false, 'EventPluginRegistry: Cannot inject two different event plugins using the same name, `%s`.', pluginName) : _prodInvariant('102', pluginName) : void 0;
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namesToPlugins[pluginName] = pluginModule;
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isOrderingDirty = true;
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}
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}
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if (isOrderingDirty) {
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recomputePluginOrdering();
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}
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},
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/**
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* Looks up the plugin for the supplied event.
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*
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* @param {object} event A synthetic event.
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* @return {?object} The plugin that created the supplied event.
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* @internal
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*/
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getPluginModuleForEvent: function (event) {
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var dispatchConfig = event.dispatchConfig;
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if (dispatchConfig.registrationName) {
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return EventPluginRegistry.registrationNameModules[dispatchConfig.registrationName] || null;
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}
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if (dispatchConfig.phasedRegistrationNames !== undefined) {
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// pulling phasedRegistrationNames out of dispatchConfig helps Flow see
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// that it is not undefined.
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var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;
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for (var phase in phasedRegistrationNames) {
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if (!phasedRegistrationNames.hasOwnProperty(phase)) {
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continue;
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}
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var pluginModule = EventPluginRegistry.registrationNameModules[phasedRegistrationNames[phase]];
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if (pluginModule) {
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return pluginModule;
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}
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}
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}
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return null;
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},
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/**
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* Exposed for unit testing.
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* @private
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*/
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_resetEventPlugins: function () {
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eventPluginOrder = null;
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for (var pluginName in namesToPlugins) {
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if (namesToPlugins.hasOwnProperty(pluginName)) {
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delete namesToPlugins[pluginName];
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}
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}
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EventPluginRegistry.plugins.length = 0;
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var eventNameDispatchConfigs = EventPluginRegistry.eventNameDispatchConfigs;
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for (var eventName in eventNameDispatchConfigs) {
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if (eventNameDispatchConfigs.hasOwnProperty(eventName)) {
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delete eventNameDispatchConfigs[eventName];
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}
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}
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var registrationNameModules = EventPluginRegistry.registrationNameModules;
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for (var registrationName in registrationNameModules) {
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if (registrationNameModules.hasOwnProperty(registrationName)) {
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delete registrationNameModules[registrationName];
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}
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}
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if (process.env.NODE_ENV !== 'production') {
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var possibleRegistrationNames = EventPluginRegistry.possibleRegistrationNames;
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for (var lowerCasedName in possibleRegistrationNames) {
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if (possibleRegistrationNames.hasOwnProperty(lowerCasedName)) {
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delete possibleRegistrationNames[lowerCasedName];
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}
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}
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}
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}
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};
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module.exports = EventPluginRegistry; |