mattermost/web/react/components/file_upload_overlay.jsx

// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
// See License.txt for license information.

module.exports = React.createClass({
    displayName: 'FileUploadOverlay',
    propTypes: {
        overlayType: React.PropTypes.string
    },
    render: function() {
        var overlayClass = 'file-overlay hidden';
        if (this.props.overlayType === 'right') {
            overlayClass += ' right-file-overlay';
        } else if (this.props.overlayType === 'center') {
            overlayClass += ' center-file-overlay';
        }

        return (
            <div className={overlayClass}>
                <div>
                    <i className='fa fa-upload'></i>
                    <span>Drop a file to upload it.</span>
                </div>
            </div>
        );
    }
});