121 lines
3.3 KiB
TypeScript
121 lines
3.3 KiB
TypeScript
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/*************************************************************
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*
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* Copyright (c) 2009-2022 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 Stack items for the physics package.
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*
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* @author v.sorge@mathjax.org (Volker Sorge)
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*/
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import {CheckType, BaseItem, StackItem} from '../StackItem.js';
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import ParseUtil from '../ParseUtil.js';
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import NodeUtil from '../NodeUtil.js';
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import TexParser from '../TexParser.js';
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import {AbstractMmlTokenNode} from '../../../core/MmlTree/MmlNode.js';
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export class AutoOpen extends BaseItem {
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/**
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* @override
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*/
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protected static errors = Object.assign(Object.create(BaseItem.errors), {
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'stop': ['ExtraOrMissingDelims', 'Extra open or missing close delimiter']
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});
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/**
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* The number of unpaired open delimiters that need to be matched before
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* a close delimiter will close this item. (#2831)
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*/
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protected openCount: number = 0;
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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 'auto open';
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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 toMml() {
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// Smash and right/left
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let parser = this.factory.configuration.parser;
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let right = this.getProperty('right') as string;
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if (this.getProperty('smash')) {
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let mml = super.toMml();
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const smash = parser.create('node', 'mpadded', [mml],
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{height: 0, depth: 0});
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this.Clear();
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this.Push(parser.create('node', 'TeXAtom', [smash]));
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}
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if (right) {
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this.Push(new TexParser(right, parser.stack.env,
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parser.configuration).mml());
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}
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let mml = ParseUtil.fenced(
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this.factory.configuration,
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this.getProperty('open') as string,
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super.toMml(),
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this.getProperty('close') as string,
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this.getProperty('big') as string
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);
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//
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// Remove fence markers that would cause it to be TeX class INNER,
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// so it is treated as a regular mrow when setting the tex class (#2760)
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//
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NodeUtil.removeProperties(mml, 'open', 'close', 'texClass');
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return mml;
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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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//
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// Check for nested open delimiters (#2831)
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//
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if (item.isKind('mml') && item.Size() === 1) {
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const mml = item.toMml();
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if (mml.isKind('mo') && (mml as AbstractMmlTokenNode).getText() === this.getProperty('open')) {
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this.openCount++;
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}
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}
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let close = item.getProperty('autoclose');
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if (close && close === this.getProperty('close') && !this.openCount--) {
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if (this.getProperty('ignore')) {
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this.Clear();
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return [[], true];
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}
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return [[this.toMml()], true];
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}
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return super.checkItem(item);
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}
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}
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