vn-verdnaturachat/app/views/RoomView/ReactionPicker.js

import React from 'react';
import PropTypes from 'prop-types';
import { View, Platform } from 'react-native';
import { connect } from 'react-redux';
import Modal from 'react-native-modal';
import { responsive } from 'react-native-responsive-ui';
import EmojiPicker from '../../containers/EmojiPicker';
import { toggleReactionPicker } from '../../actions/messages';
import styles from './styles';

const margin = Platform.OS === 'android' ? 40 : 20;
const tabEmojiStyle = { fontSize: 15 };

@connect(state => ({
	showReactionPicker: state.messages.showReactionPicker
}), dispatch => ({
	toggleReactionPicker: message => dispatch(toggleReactionPicker(message))
}))
@responsive
export default class ReactionPicker extends React.Component {
	static propTypes = {
		window: PropTypes.any,
		showReactionPicker: PropTypes.bool,
		toggleReactionPicker: PropTypes.func,
		onEmojiSelected: PropTypes.func
	};

	shouldComponentUpdate(nextProps) {
		return nextProps.showReactionPicker !== this.props.showReactionPicker || this.props.window.width !== nextProps.window.width;
	}

	onEmojiSelected(emoji, shortname) {
		// standard emojis: `emoji` is unicode and `shortname` is :joy:
		// custom emojis: only `emoji` is returned with shortname type (:joy:)
		// to set reactions, we need shortname type
		this.props.onEmojiSelected(shortname || emoji);
	}

	render() {
		const { window: { width, height }, showReactionPicker } = this.props;

		return (showReactionPicker ?
			<Modal
				isVisible={this.props.showReactionPicker}
				style={{ alignItems: 'center' }}
				onBackdropPress={() => this.props.toggleReactionPicker()}
				onBackButtonPress={() => this.props.toggleReactionPicker()}
				animationIn='fadeIn'
				animationOut='fadeOut'
			>
				<View style={[styles.reactionPickerContainer, { width: width - margin, height: Math.min(width, height) - (margin * 2) }]}>
					<EmojiPicker
						tabEmojiStyle={tabEmojiStyle}
						width={Math.min(width, height) - margin}
						onEmojiSelected={(emoji, shortname) => this.onEmojiSelected(emoji, shortname)}
					/>
				</View>
			</Modal> : null
		);
	}
}