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11 | 'use strict';
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12 |
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13 | const EventEmitter = require('EventEmitter');
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14 | const EventSubscriptionVendor = require('EventSubscriptionVendor');
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15 |
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16 | import type EmitterSubscription from 'EmitterSubscription';
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17 |
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18 | function checkNativeEventModule(eventType: ?string) {
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19 | if (eventType) {
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20 | if (eventType.lastIndexOf('statusBar', 0) === 0) {
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21 | throw new Error(
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22 | '`' +
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23 | eventType +
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24 | '` event should be registered via the StatusBarIOS module',
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25 | );
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26 | }
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27 | if (eventType.lastIndexOf('keyboard', 0) === 0) {
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28 | throw new Error(
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29 | '`' +
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30 | eventType +
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31 | '` event should be registered via the Keyboard module',
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32 | );
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33 | }
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34 | if (eventType === 'appStateDidChange' || eventType === 'memoryWarning') {
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35 | throw new Error(
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36 | '`' +
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37 | eventType +
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38 | '` event should be registered via the AppState module',
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39 | );
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40 | }
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41 | }
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42 | }
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43 |
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44 |
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45 |
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47 |
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48 | class RCTDeviceEventEmitter extends EventEmitter {
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49 | sharedSubscriber: EventSubscriptionVendor;
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50 |
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51 | constructor() {
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52 | const sharedSubscriber = new EventSubscriptionVendor();
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53 | super(sharedSubscriber);
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54 | this.sharedSubscriber = sharedSubscriber;
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55 | }
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56 |
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57 | addListener(
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58 | eventType: string,
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59 | listener: Function,
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60 | context: ?Object,
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61 | ): EmitterSubscription {
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62 | if (__DEV__) {
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63 | checkNativeEventModule(eventType);
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64 | }
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65 | return super.addListener(eventType, listener, context);
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66 | }
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67 |
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68 | removeAllListeners(eventType: ?string) {
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69 | if (__DEV__) {
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70 | checkNativeEventModule(eventType);
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71 | }
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72 | super.removeAllListeners(eventType);
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73 | }
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74 |
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75 | removeSubscription(subscription: EmitterSubscription) {
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76 | if (subscription.emitter !== this) {
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77 | subscription.emitter.removeSubscription(subscription);
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78 | } else {
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79 | super.removeSubscription(subscription);
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80 | }
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81 | }
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82 | }
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83 |
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84 | module.exports = new RCTDeviceEventEmitter();
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