86 lines
2.7 KiB
TypeScript
86 lines
2.7 KiB
TypeScript
/*************************************************************
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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 Error class for the TeX parser.
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*
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* @author v.sorge@mathjax.org (Volker Sorge)
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*/
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export default class TexError {
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private static pattern =
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/%(\d+|\{\d+\}|\{[a-z]+:\%\d+(?:\|(?:%\{\d+\}|%.|[^\}])*)+\}|.)/g;
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/**
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* Default error message.
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* @type {string}
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*/
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public message: string;
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/**
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* The old MathJax processing function.
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* @param {string} str The basic error message.
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* @param {string[]} args The arguments to be replaced in the error message.
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* @return {string} The processed error string.
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*/
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private static processString(str: string, args: string[]): string {
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let parts = str.split(TexError.pattern);
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for (let i = 1, m = parts.length; i < m; i += 2) {
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let c = parts[i].charAt(0); // first char will be { or \d or a char to be
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// kept literally
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if (c >= '0' && c <= '9') { // %n
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parts[i] = args[parseInt(parts[i], 10) - 1];
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if (typeof parts[i] === 'number') {
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parts[i] = parts[i].toString();
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}
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} else if (c === '{') { // %{n} or %{plural:%n|...}
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c = parts[i].substr(1);
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if (c >= '0' && c <= '9') { // %{n}
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parts[i] = args[parseInt(parts[i].substr(1, parts[i].length - 2), 10) - 1];
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if (typeof parts[i] === 'number') {
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parts[i] = parts[i].toString();
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}
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} else { // %{plural:%n|...}
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let match = parts[i].match(/^\{([a-z]+):%(\d+)\|(.*)\}$/);
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if (match) {
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// Removed plural here.
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parts[i] = '%' + parts[i];
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}
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}
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}
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if (parts[i] == null) {
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parts[i] = '???';
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}
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}
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return parts.join('');
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}
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/**
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* @constructor
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* @param{string} id message id (for localization)
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* @param{string} message text of English message
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* @param{string[]=} rest any substitution arguments
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*/
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constructor(public id: string, message: string, ...rest: string[]) {
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this.message = TexError.processString(message, rest);
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}
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}
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