75 lines
2.1 KiB
TypeScript
75 lines
2.1 KiB
TypeScript
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/*************************************************************
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*
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* Copyright (c) 2018-2022 The 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 Items for TeX parsing of new environments.
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*
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* @author v.sorge@mathjax.org (Volker Sorge)
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*/
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import TexError from '../TexError.js';
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import {CheckType, BaseItem, StackItem} from '../StackItem.js';
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/**
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* Opening Item dealing with definitions of new environments. It's pushed onto
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* the stack whenever a user defined environment is encountered and remains
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* until a corresponding \\end collapses the stack.
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*/
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export class BeginEnvItem extends BaseItem {
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/**
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* @override
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*/
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public get kind() {
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return 'beginEnv';
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}
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/**
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* @override
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*/
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get isOpen() {
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return true;
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}
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/**
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* @override
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*/
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public checkItem(item: StackItem): CheckType {
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if (item.isKind('end')) {
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// @test Newenvironment Empty, Newenvironment Align
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if (item.getName() !== this.getName()) {
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// @test (missing) \newenvironment{env}{aa}{bb}\begin{env}cc\end{equation}
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throw new TexError('EnvBadEnd', '\\begin{%1} ended with \\end{%2}',
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this.getName(), item.getName());
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}
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return [[this.factory.create('mml', this.toMml())], true];
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}
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if (item.isKind('stop')) {
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// @test (missing) \newenvironment{env}{aa}{bb}\begin{env}cc
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throw new TexError('EnvMissingEnd', 'Missing \\end{%1}', this.getName());
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}
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// @test Newenvironment Empty, Newenvironment Align
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return super.checkItem(item);
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}
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}
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