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/**
* @name string-collapse-leading-whitespace
* @fileoverview Collapse the leading and trailing whitespace of a string
* @version 5.1.0
* @author Roy Revelt, Codsen Ltd
* @license MIT
* {@link https://codsen.com/os/string-collapse-leading-whitespace/}
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.stringCollapseLeadingWhitespace = {}));
}(this, (function (exports) { 'use strict';
var version$1 = "5.1.0";
const version = version$1;
function collWhitespace(str, originallineBreakLimit = 1) {
const rawNbsp = "\u00A0";
// helpers
function reverse(s) {
return Array.from(s).reverse().join("");
}
// replaces the leading/trailing whitespace chunks with final strings
function prep(whitespaceChunk, limit, trailing) {
// when processing the leading whitespace, it's \n\r --- CR - LF
// when processing the trailing whitespace, we're processing inverted order,
// so it's \n\r --- LF - CR
// for this reason, we set first and second linebreak according to direction,
// the "trailing" boolean:
const firstBreakChar = trailing ? "\n" : "\r";
const secondBreakChar = trailing ? "\r" : "\n";
if (!whitespaceChunk) {
return whitespaceChunk;
}
let crlfCount = 0;
let res = "";
// let beginning = true;
for (let i = 0, len = whitespaceChunk.length; i < len; i++) {
if (whitespaceChunk[i] === firstBreakChar ||
(whitespaceChunk[i] === secondBreakChar &&
whitespaceChunk[i - 1] !== firstBreakChar)) {
crlfCount++;
}
if (`\r\n`.includes(whitespaceChunk[i]) ||
whitespaceChunk[i] === rawNbsp) {
if (whitespaceChunk[i] === rawNbsp) {
res += whitespaceChunk[i];
}
else if (whitespaceChunk[i] === firstBreakChar) {
if (crlfCount <= limit) {
res += whitespaceChunk[i];
if (whitespaceChunk[i + 1] === secondBreakChar) {
res += whitespaceChunk[i + 1];
i++;
}
}
}
else if (whitespaceChunk[i] === secondBreakChar &&
(!whitespaceChunk[i - 1] ||
whitespaceChunk[i - 1] !== firstBreakChar) &&
crlfCount <= limit) {
res += whitespaceChunk[i];
}
}
else {
if (!whitespaceChunk[i + 1] && !crlfCount) {
res += " ";
}
}
}
return res;
}
if (typeof str === "string" && str.length) {
// without a fuss, set the max allowed line breaks as a leading/trailing whitespace:
let lineBreakLimit = 1;
if (typeof +originallineBreakLimit === "number" &&
Number.isInteger(+originallineBreakLimit) &&
+originallineBreakLimit >= 0) {
lineBreakLimit = +originallineBreakLimit;
}
// plan: extract what would String.prototype() would remove, front and back parts
let frontPart = "";
let endPart = "";
if (!str.trim()) {
frontPart = str;
}
else if (!str[0].trim()) {
for (let i = 0, len = str.length; i < len; i++) {
if (str[i].trim()) {
frontPart = str.slice(0, i);
break;
}
}
}
// if whole string is whitespace, endPart is empty string
if (str.trim() &&
(str.slice(-1).trim() === "" || str.slice(-1) === rawNbsp)) {
for (let i = str.length; i--;) {
// console.log(
// `${`\u001b[${36}m${`----------------------------------------------\niterating through: ${JSON.stringify(
// str[i],
// null,
// 4
// )}`}\u001b[${39}m`}`
// );
if (str[i].trim()) {
endPart = str.slice(i + 1);
break;
}
}
}
// -------------------------------------------------------------------------
return `${prep(frontPart, lineBreakLimit, false)}${str.trim()}${reverse(prep(reverse(endPart), lineBreakLimit, true))}`;
}
return str;
}
exports.collWhitespace = collWhitespace;
exports.version = version;
Object.defineProperty(exports, '__esModule', { value: true });
})));
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