openecomp-ui/src/nfvo-components/loader/Loader.jsx

/*
 * Copyright © 2016-2017 European Support Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import React from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';

const mapStateToProps = ({ loader }) => {
    return {
        isLoading: loader.isLoading
    };
};

class Loader extends React.Component {
    static propTypes = {
        isLoading: PropTypes.bool.isRequired
    };

    static defaultProps = {
        isLoading: false
    };

    shouldComponentUpdate(nextProps) {
        return nextProps.isLoading !== this.props.isLoading;
    }

    render() {
        let { isLoading } = this.props;
        return (
            <div className="onboarding-loader">
                {isLoading && (
                    <div className="onboarding-loader-backdrop">
                        <div className="tlv-loader large" />
                    </div>
                )}
            </div>
        );
    }
}

export default connect(mapStateToProps)(Loader);