zeppelin-examples/zeppelin-example-spell-markdown/index.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 {
    SpellBase,
    SpellResult,
    DefaultDisplayType,
} from 'zeppelin-spell';

import md from 'markdown';

const markdown = md.markdown;

export default class MarkdownSpell extends SpellBase {
    constructor() {
        super("%markdown");
    }

    interpret(paragraphText) {
        const parsed = markdown.toHTML(paragraphText);

        /**
         * specify `DefaultDisplayType.HTML` since `parsed` will contain DOM
         * otherwise it will be rendered as `DefaultDisplayType.TEXT` (default)
         */
        return new SpellResult(parsed, DefaultDisplayType.HTML);
    }
}