/*
 * Copyright 2015 Palantir Technologies, Inc. All rights reserved.
 *
 * 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 classNames from "classnames";
import * as React from "react";

import * as Classes from "../../common/classes";
import { DISPLAYNAME_PREFIX, IProps } from "../../common/props";
import { H6 } from "../html/html";

export interface IMenuDividerProps extends IProps {
    /** This component does not support children. */
    children?: never;

    /** Optional header title. */
    title?: React.ReactNode;
}

export class MenuDivider extends React.Component<IMenuDividerProps, {}> {
    public static displayName = `${DISPLAYNAME_PREFIX}.MenuDivider`;

    public render() {
        const { className, title } = this.props;
        if (title == null) {
            // simple divider
            return <li className={classNames(Classes.MENU_DIVIDER, className)} />;
        } else {
            // section header with title
            return (
                <li className={classNames(Classes.MENU_HEADER, className)}>
                    <H6>{title}</H6>
                </li>
            );
        }
    }
}