app/node_modules/mathjax-full/ts/output/chtml/Wrappers/mtd.ts

/*************************************************************
 *
 *  Copyright (c) 2017-2022 The MathJax Consortium
 *
 *  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.
 */

/**
 * @fileoverview  Implements the CHTMLmtd wrapper for the MmlMtd object
 *
 * @author dpvc@mathjax.org (Davide Cervone)
 */

import {CHTMLWrapper, CHTMLConstructor} from '../Wrapper.js';
import {CommonMtdMixin} from '../../common/Wrappers/mtd.js';
import {MmlMtd} from '../../../core/MmlTree/MmlNodes/mtd.js';
import {StyleList} from '../../../util/StyleList.js';

/*****************************************************************/
/**
 * The CHTMLmtd wrapper for the MmlMtd object
 *
 * @template N  The HTMLElement node class
 * @template T  The Text node class
 * @template D  The Document class
 */
// @ts-ignore
export class CHTMLmtd<N, T, D> extends
CommonMtdMixin<CHTMLConstructor<any, any, any>>(CHTMLWrapper) {

  /**
   * The mtd wrapper
   */
  public static kind = MmlMtd.prototype.kind;

  /**
   * @override
   */
  public static styles: StyleList = {
    'mjx-mtd': {
      display: 'table-cell',
      'text-align': 'center',
      'padding': '.215em .4em'
    },
    'mjx-mtd:first-child': {
      'padding-left': 0
    },
    'mjx-mtd:last-child': {
      'padding-right': 0
    },
    'mjx-mtable > * > mjx-itable > *:first-child > mjx-mtd': {
      'padding-top': 0
    },
    'mjx-mtable > * > mjx-itable > *:last-child > mjx-mtd': {
      'padding-bottom': 0
    },
    'mjx-tstrut': {
      display: 'inline-block',
      height: '1em',
      'vertical-align': '-.25em'
    },
    'mjx-labels[align="left"] > mjx-mtr > mjx-mtd': {
      'text-align': 'left'
    },
    'mjx-labels[align="right"] > mjx-mtr > mjx-mtd': {
      'text-align': 'right'
    },
    'mjx-mtd[extra]': {
      padding: 0
    },
    'mjx-mtd[rowalign="top"]': {
      'vertical-align': 'top'
    },
    'mjx-mtd[rowalign="center"]': {
      'vertical-align': 'middle'
    },
    'mjx-mtd[rowalign="bottom"]': {
      'vertical-align': 'bottom'
    },
    'mjx-mtd[rowalign="baseline"]': {
      'vertical-align': 'baseline'
    },
    'mjx-mtd[rowalign="axis"]': {
      'vertical-align': '.25em'
    }
  };

  /**
   * @override
   */
  public toCHTML(parent: N) {
    super.toCHTML(parent);
    const ralign = this.node.attributes.get('rowalign') as string;
    const calign = this.node.attributes.get('columnalign') as string;
    const palign = this.parent.node.attributes.get('rowalign') as string;
    if (ralign !== palign) {
      this.adaptor.setAttribute(this.chtml, 'rowalign', ralign);
    }
    if (calign !== 'center' &&
        (this.parent.kind !== 'mlabeledtr' || this !== this.parent.childNodes[0] ||
         calign !== this.parent.parent.node.attributes.get('side'))) {
      this.adaptor.setStyle(this.chtml, 'textAlign', calign);
    }
    //
    // If we are using minimum row heights,
    //   Include a strut to force minimum height and depth
    //
    if (this.parent.parent.node.getProperty('useHeight')) {
      this.adaptor.append(this.chtml, this.html('mjx-tstrut'));
    }
  }

}