add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/ts/util/string.ts

@@ -0,0 +1,84 @@
+/*************************************************************
+ *
+ *  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 some string utility functions
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+
+/**
+ * Sort strings by length
+ *
+ * @param {string} a  First string to be compared
+ * @param {string} b  Second string to be compared
+ * @return {number}  -1 id a < b, 0 of a === b, 1 if a > b
+ */
+export function sortLength(a: string, b: string): number {
+  return a.length !== b.length ? b.length - a.length : a === b ? 0 : a < b ? -1 : 1;
+}
+
+/**
+ * Quote a string for use in regular expressions
+ *
+ * @param {string} text  The text whose regex characters are to be quoted
+ * @return {string}  The quoted string
+ */
+export function quotePattern(text: string): string {
+  return text.replace(/([\^$(){}+*?\-|\[\]\:\\])/g, '\\$1');
+}
+
+/**
+ * Convert a UTF-8 string to an array of unicode code points
+ *
+ * @param {string} text  The string to be turned into unicode positions
+ * @return {number[]}  Array of numbers representing the string's unicode character positions
+ */
+export function unicodeChars(text: string): number[] {
+  return Array.from(text).map((c) => c.codePointAt(0));
+}
+
+/**
+ * Convert an array of unicode code points to a string
+ *
+ * @param {number[]} data   The array of unicode code points
+ * @return {string}         The string consisting of the characters at those points
+ */
+export function unicodeString(data: number[]): string {
+  return String.fromCodePoint(...data);
+}
+
+/**
+ * Test if a value is a percentage
+ *
+ * @param {string} x   The string to test
+ * @return {boolean}   True if the string ends with a percent sign
+ */
+export function isPercent(x: string): boolean {
+  return !!x.match(/%\s*$/);
+}
+
+/**
+ * Split a space-separated string of values
+ *
+ * @param {string} x   The string to be split
+ * @return {string[]}  The list of white-space-separated "words" in the string
+ */
+export function split(x: string): string[] {
+  return x.trim().split(/\s+/);
+}