react-native-ui-lib/src/components/textArea/index.js

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import React from 'react';
import {View, TextInput as RNTextInput, StyleSheet} from 'react-native';
import {TextInputPropTypes} from 'deprecated-react-native-prop-types';
import BaseInput from '../baseInput';
import {Colors} from '../../style';

/**
 * @description: a wrapper for Text Field component to create enclosed text area
 * @modifiers: Typography
 * @extends: TextField
 * @extendsLink: https://github.com/wix/react-native-ui-lib/blob/master/src/components/textField/index.js
 * @gif: https://media.giphy.com/media/3oFzmoU8TdfHeYZNZu/giphy.gif
 * @example: https://github.com/wix/react-native-ui-lib/blob/master/demo/src/screens/componentScreens/TextFieldScreen/InputsScreen.js
 */
export default class TextArea extends BaseInput {
  static displayName = 'TextArea';

  static propTypes = {
    ...TextInputPropTypes,
    ...BaseInput.propTypes
  };

  generateStyles() {
    this.styles = createStyles(this.props);
  }

  render() {
    const {value} = this.state;
    const typography = this.getTypography();
    const inputStyle = [this.styles.input, typography];
    return (
      <View style={this.styles.container}>
        <RNTextInput
          placeholderTextColor={Colors.$textNeutral}
          color={Colors.$textDefault}
          {...this.props}
          value={value}
          multiline
          style={inputStyle}
          underlineColorAndroid="transparent"
          onChangeText={this.onChangeText}
          ref={input => {
            this.input = input;
          }}
        />
      </View>
    );
  }
}

function createStyles() {
  return StyleSheet.create({
    container: {
      flex: 1
    },
    input: {
      flex: 1,
      justifyContent: 'flex-start',
      alignItems: 'flex-start',
      textAlignVertical: 'top'
    }
  });
}