432 lines
14 KiB
JavaScript
432 lines
14 KiB
JavaScript
/**
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* Copyright 2004-present Facebook. All Rights Reserved.
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*
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* @providesModule TextInput
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*/
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'use strict';
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var DocumentSelectionState = require('DocumentSelectionState');
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var EventEmitter = require('EventEmitter');
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var NativeMethodsMixin = require('NativeMethodsMixin');
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var NativeModulesDeprecated = require('NativeModulesDeprecated');
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var PropTypes = require('ReactPropTypes');
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var React = require('React');
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var ReactChildren = require('ReactChildren');
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var ReactIOSViewAttributes = require('ReactIOSViewAttributes');
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var StyleSheet = require('StyleSheet');
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var Subscribable = require('Subscribable');
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var Text = require('Text');
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var TextInputState = require('TextInputState');
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var TimerMixin = require('TimerMixin');
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var TouchableWithoutFeedback = require('TouchableWithoutFeedback');
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var createReactIOSNativeComponentClass = require('createReactIOSNativeComponentClass');
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var emptyFunction = require('emptyFunction');
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var getObjectValues = require('getObjectValues');
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var invariant = require('invariant');
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var merge = require('merge');
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/**
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* <TextInput> - A foundational component for inputting text into the app via a
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* keyboard. Props provide configurability for several features, such as auto-
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* correction, auto-capitalization, placeholder text, and different keyboard
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* types, such as a numeric keypad.
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*
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* The simplest use case is to plop down a `TextInput` and subscribe to the
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* `onChangeText` events to read the user input. There are also other events, such
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* as `onSubmitEditing` and `onFocus` that can be subscribed to. A simple
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* example:
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*
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* <View>
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* <TextInput
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* style={{height: 40, borderColor: 'gray', borderWidth: 1}}
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* onChangeText={(text) => this.setState({input: text})}
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* />
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* <Text>{'user input: ' + this.state.input}</Text>
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* </View>
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*
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* The `value` prop can be used to set the value of the input in order to make
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* the state of the component clear, but <TextInput> does not behave as a true
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* controlled component by default because all operations are asynchronous.
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* Setting `value` once is like setting the default value, but you can change it
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* continuously based on `onChangeText` events as well. If you really want to
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* force the component to always revert to the value you are setting, you can
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* set `controlled={true}`.
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*
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* The `multiline` prop is not supported in all releases, and some props are
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* multiline only.
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*
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* More example code in `TextInputExample.js`.
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*/
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var nativeConstants = NativeModulesDeprecated.RKUIManager.UIText.AutocapitalizationType;
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var autoCapitalizeMode = {
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none: nativeConstants.None,
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sentences: nativeConstants.Sentences,
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words: nativeConstants.Words,
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characters: nativeConstants.AllCharacters
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};
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var keyboardType = {
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default: 'default',
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numeric: 'numeric',
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};
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var RKTextViewAttributes = merge(ReactIOSViewAttributes.UIView, {
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autoCorrect: true,
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autoCapitalize: true,
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color: true,
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editable: true,
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fontSize: true,
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fontWeight: true,
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keyboardType: true,
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mostRecentEventCounter: true,
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placeholder: true,
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placeholderTextColor: true,
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text: true,
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});
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var RKTextFieldAttributes = merge(RKTextViewAttributes, {
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caretHidden: true,
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enabled: true,
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});
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var onlyMultiline = {
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onSelectionChange: true,
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onTextInput: true,
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children: true,
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};
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var notMultiline = {
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onSubmitEditing: true,
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};
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var TextInput = React.createClass({
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statics: {
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autoCapitalizeMode: autoCapitalizeMode,
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keyboardType: keyboardType,
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},
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propTypes: {
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/**
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* Can tell TextInput to automatically capitalize certain characters.
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*
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* - characters: all characters,
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* - words: first letter of each word
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* - sentences: first letter of each sentence (default)
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* - none: don't auto capitalize anything
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*
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* example:
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* autoCapitalize={TextInput.autoCapitalizeMode.words}
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*/
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autoCapitalize: PropTypes.oneOf(getObjectValues(autoCapitalizeMode)),
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/**
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* If false, disables auto-correct. Default value is true.
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*/
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autoCorrect: PropTypes.bool,
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/**
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* If true, focuses the input on componentDidMount. Default value is false.
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*/
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autoFocus: PropTypes.bool,
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/**
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* If false, text is not editable. Default value is true.
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*/
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editable: PropTypes.bool,
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/**
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* Determines which keyboard to open, e.g.`TextInput.keyboardType.numeric`.
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*/
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keyboardType: PropTypes.oneOf(getObjectValues(keyboardType)),
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/**
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* If true, the text input can be multiple lines. Default value is false.
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*/
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multiline: PropTypes.bool,
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/**
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* Callback that is called when the text input is blurred
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*/
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onBlur: PropTypes.func,
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/**
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* Callback that is called when the text input is focused
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*/
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onFocus: PropTypes.func,
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/**
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* (text: string) => void
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*
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* Callback that is called when the text input's text changes.
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*/
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onChangeText: PropTypes.func,
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onEndEditing: PropTypes.func,
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onSubmitEditing: PropTypes.func,
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/**
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* The string that will be rendered before text input has been entered
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*/
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placeholder: PropTypes.string,
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/**
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* The text color of the placeholder string
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*/
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placeholderTextColor: PropTypes.string,
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/**
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* See DocumentSelectionState.js, some state that is responsible for
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* maintaining selection information for a document
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*/
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selectionState: PropTypes.instanceOf(DocumentSelectionState),
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/**
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* The default value for the text input
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*/
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value: PropTypes.string,
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/**
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* This helps avoid drops characters due to race conditions between JS and
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* the native text input. The default should be fine, but if you're
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* potentially doing very slow operations on every keystroke then you may
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* want to try increasing this.
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*/
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bufferDelay: PropTypes.number,
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/**
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* If you really want this to behave as a controlled component, you can set
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* this true, but you will probably see flickering, dropped keystrokes,
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* and/or laggy typing, depending on how you process onChange events.
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*/
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controlled: PropTypes.bool,
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style: Text.stylePropType,
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},
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/**
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* `NativeMethodsMixin` will look for this when invoking `setNativeProps`. We
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* make `this` look like an actual native component class.
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*/
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mixins: [NativeMethodsMixin, TimerMixin, Subscribable.Mixin],
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viewConfig: {
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uiViewClassName: 'RCTTextField',
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validAttributes: RKTextFieldAttributes,
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},
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isFocused: function() {
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return TextInputState.currentlyFocusedField() ===
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this.refs.input.getNativeNode();
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},
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getDefaultProps: function() {
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return {
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bufferDelay: 100,
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};
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},
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getInitialState: function() {
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return {
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mostRecentEventCounter: 0,
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bufferedValue: this.props.value,
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};
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},
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contextTypes: {
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onFocusRequested: React.PropTypes.func,
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focusEmitter: React.PropTypes.instanceOf(EventEmitter),
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},
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componentDidMount: function() {
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if (!this.context.focusEmitter) {
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if (this.props.autoFocus) {
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this.requestAnimationFrame(this.focus);
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}
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return;
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}
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this.addListenerOn(this.context.focusEmitter, 'focus', (el) => {
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if (this === el) {
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this.requestAnimationFrame(this.focus);
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} else if (this.isFocused()) {
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this.blur();
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}
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});
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if (this.props.autoFocus) {
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this.context.onFocusRequested(this);
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}
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},
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componentWillReceiveProps: function(newProps) {
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if (newProps.value !== this.props.value) {
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if (!this.isFocused()) {
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// Set the value immediately if the input is not focused since that
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// means there is no risk of the user typing immediately.
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this.setState({bufferedValue: newProps.value});
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} else {
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// The following clear and setTimeout buffers the value such that if more
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// characters are typed in quick succession, generating new values, the
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// out of date values will get cancelled before they are ever sent to
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// native.
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//
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// If we don't do this, it's likely the out of date values will blow
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// away recently typed characters in the native input that JS was not
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// yet aware of (since it is informed asynchronously), then the next
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// character will be appended to the older value, dropping the
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// characters in between. Here is a potential sequence of events
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// (recall we have multiple independently serial, interleaved queues):
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//
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// 1) User types 'R' => send 'R' to JS queue.
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// 2) User types 'e' => send 'Re' to JS queue.
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// 3) JS processes 'R' and sends 'R' back to native.
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// 4) Native recieves 'R' and changes input from 'Re' back to 'R'.
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// 5) User types 'a' => send 'Ra' to JS queue.
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// 6) JS processes 'Re' and sends 'Re' back to native.
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// 7) Native recieves 'Re' and changes input from 'R' back to 'Re'.
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// 8) JS processes 'Ra' and sends 'Ra' back to native.
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// 9) Native recieves final 'Ra' from JS - 'e' has been dropped!
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//
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// This isn't 100% foolproop (e.g. if it takes longer than
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// `props.bufferDelay` ms to process one keystroke), and there are of
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// course other potential algorithms to deal with this, but this is a
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// simple solution that seems to reduce the chance of dropped characters
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// drastically without compromising native input responsiveness (e.g. by
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// introducing delay from a synchronization protocol).
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this.clearTimeout(this._bufferTimeout);
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this._bufferTimeout = this.setTimeout(
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() => this.setState({bufferedValue: newProps.value}),
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this.props.bufferDelay
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);
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}
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}
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},
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render: function() {
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var textContainer;
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if (!this.props.multiline) {
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for (var propKey in onlyMultiline) {
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if (this.props[propKey]) {
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throw new Error(
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'TextInput prop `' + propKey + '` is only supported with multiline.'
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);
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}
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}
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textContainer =
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<RKTextField
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ref="input"
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style={[styles.input, this.props.style]}
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enabled={this.props.editable}
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keyboardType={this.props.keyboardType}
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onFocus={this._onFocus}
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onBlur={this._onBlur}
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onChange={this._onChange}
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onEndEditing={this.props.onEndEditing}
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onSubmitEditing={this.props.onSubmitEditing}
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onSelectionChangeShouldSetResponder={() => true}
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placeholder={this.props.placeholder}
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text={this.state.bufferedValue}
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autoCapitalize={this.props.autoCapitalize}
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autoCorrect={this.props.autoCorrect}
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/>;
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} else {
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for (var propKey in notMultiline) {
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if (this.props[propKey]) {
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throw new Error(
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'TextInput prop `' + propKey + '` cannot be used with multiline.'
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);
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}
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}
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var children = this.props.children;
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var childCount = 0;
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ReactChildren.forEach(children, () => ++childCount);
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invariant(
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!(this.props.value && childCount),
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'Cannot specify both value and children.'
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);
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if (childCount > 1) {
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children = <Text>{children}</Text>;
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}
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if (this.props.inputView) {
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children = [children, this.props.inputView];
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}
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textContainer =
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<RKTextView
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ref="input"
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style={[styles.input, this.props.style]}
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children={children}
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mostRecentEventCounter={this.state.mostRecentEventCounter}
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editable={this.props.editable}
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onFocus={this._onFocus}
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onBlur={this._onBlur}
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onChange={this._onChange}
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onEndEditing={this.props.onEndEditing}
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onSelectionChange={this._onSelectionChange}
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onTextInput={this._onTextInput}
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onSelectionChangeShouldSetResponder={emptyFunction.thatReturnsTrue}
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placeholder={this.props.placeholder}
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placeholderTextColor={this.props.placeholderTextColor}
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text={this.state.bufferedValue}
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autoCapitalize={this.props.autoCapitalize}
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autoCorrect={this.props.autoCorrect}
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/>;
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}
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return (
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<TouchableWithoutFeedback
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onPress={this._onPress}
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rejectResponderTermination={true}>
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{textContainer}
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</TouchableWithoutFeedback>
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);
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},
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_onFocus: function(event) {
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if (this.props.onFocus) {
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this.props.onFocus(event);
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}
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},
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_onPress: function(event) {
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this.focus();
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},
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_onChange: function(event) {
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if (this.props.controlled && event.nativeEvent.text !== this.props.value) {
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this.refs.input.setNativeProps({text: this.props.value});
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}
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this.props.onChange && this.props.onChange(event);
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this.props.onChangeText && this.props.onChangeText(event.nativeEvent.text);
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},
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_onBlur: function(event) {
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this.blur();
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if (this.props.onBlur) {
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this.props.onBlur(event);
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}
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},
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_onSelectionChange: function(event) {
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if (this.props.selectionState) {
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var selection = event.nativeEvent.selection;
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this.props.selectionState.update(selection.start, selection.end);
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}
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this.props.onSelectionChange && this.props.onSelectionChange(event);
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},
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_onTextInput: function(event) {
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this.props.onTextInput && this.props.onTextInput(event);
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var counter = event.nativeEvent.eventCounter;
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if (counter > this.state.mostRecentEventCounter) {
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this.setState({mostRecentEventCounter: counter});
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}
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},
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});
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var styles = StyleSheet.create({
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input: {
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alignSelf: 'stretch',
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},
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});
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var RKTextView = createReactIOSNativeComponentClass({
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validAttributes: RKTextViewAttributes,
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uiViewClassName: 'RCTTextView',
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});
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var RKTextField = createReactIOSNativeComponentClass({
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validAttributes: RKTextFieldAttributes,
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uiViewClassName: 'RCTTextField',
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});
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module.exports = TextInput;
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