71 lines
2.2 KiB
TypeScript
71 lines
2.2 KiB
TypeScript
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/*************************************************************
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* Copyright (c) 2020-2022 MathJax Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview Implementation of items for the mathtools package.
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*
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* @author v.sorge@mathjax.org (Volker Sorge)
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* @author dpvc@mathjax.org (Davide P. Cervone)
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*/
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import {MultlineItem} from '../ams/AmsItems.js';
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import NodeUtil from '../NodeUtil.js';
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import {TexConstant} from '../TexConstants.js';
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/**
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* The StackItem for the multlined environment
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*/
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export class MultlinedItem extends MultlineItem {
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/**
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* @override
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*/
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get kind() {
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return 'multlined';
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}
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/**
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* @override
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*/
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public EndTable() {
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if (this.Size() || this.row.length) {
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this.EndEntry();
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this.EndRow();
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}
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if (this.table.length > 1) {
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const options = this.factory.configuration.options.mathtools;
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const gap = options.multlinegap;
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const firstskip = options['firstline-afterskip'] || gap;
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const lastskip = options['lastline-preskip'] || gap;
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const first = NodeUtil.getChildren(this.table[0])[0];
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if (NodeUtil.getAttribute(first, 'columnalign') !== TexConstant.Align.RIGHT) {
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first.appendChild(this.create('node', 'mspace', [], {width: firstskip}));
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}
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const last = NodeUtil.getChildren(this.table[this.table.length - 1])[0];
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if (NodeUtil.getAttribute(last, 'columnalign') !== TexConstant.Align.LEFT) {
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const top = NodeUtil.getChildren(last)[0];
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top.childNodes.unshift(null);
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const space = this.create('node', 'mspace', [], {width: lastskip});
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NodeUtil.setChild(top, 0, space);
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}
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}
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super.EndTable.call(this);
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}
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}
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