127 lines
2.9 KiB
JavaScript
127 lines
2.9 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Gengkun He @ahabhgk
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*/
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"use strict";
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/** @typedef {import("../../declarations/WebpackOptions").CssGeneratorExportsConvention} CssGeneratorExportsConvention */
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/**
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* @param {string} input input
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* @param {CssGeneratorExportsConvention | undefined} convention convention
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* @returns {string[]} results
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*/
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module.exports.cssExportConvention = (input, convention) => {
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const set = new Set();
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if (typeof convention === "function") {
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set.add(convention(input));
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} else {
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switch (convention) {
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case "camel-case": {
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set.add(input);
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set.add(module.exports.camelCase(input));
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break;
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}
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case "camel-case-only": {
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set.add(module.exports.camelCase(input));
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break;
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}
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case "dashes": {
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set.add(input);
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set.add(module.exports.dashesCamelCase(input));
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break;
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}
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case "dashes-only": {
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set.add(module.exports.dashesCamelCase(input));
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break;
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}
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case "as-is": {
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set.add(input);
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break;
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}
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}
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}
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return Array.from(set);
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};
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// Copy from css-loader
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/**
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* @param {string} input input
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* @returns {string} result
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*/
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module.exports.dashesCamelCase = input =>
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input.replace(/-+(\w)/g, (match, firstLetter) => firstLetter.toUpperCase());
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// Copy from css-loader
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/**
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* @param {string} input input
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* @returns {string} result
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*/
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module.exports.camelCase = input => {
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let result = input.trim();
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if (result.length === 0) {
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return "";
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}
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if (result.length === 1) {
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return result.toLowerCase();
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}
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const hasUpperCase = result !== result.toLowerCase();
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if (hasUpperCase) {
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result = preserveCamelCase(result);
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}
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return result
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.replace(/^[_.\- ]+/, "")
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.toLowerCase()
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.replace(/[_.\- ]+([\p{Alpha}\p{N}_]|$)/gu, (_, p1) => p1.toUpperCase())
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.replace(/\d+([\p{Alpha}\p{N}_]|$)/gu, m => m.toUpperCase());
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};
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// Copy from css-loader
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/**
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* @param {string} string string
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* @returns {string} result
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*/
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const preserveCamelCase = string => {
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let result = string;
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let isLastCharLower = false;
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let isLastCharUpper = false;
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let isLastLastCharUpper = false;
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for (let i = 0; i < result.length; i++) {
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const character = result[i];
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if (isLastCharLower && /[\p{Lu}]/u.test(character)) {
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result = `${result.slice(0, i)}-${result.slice(i)}`;
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isLastCharLower = false;
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isLastLastCharUpper = isLastCharUpper;
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isLastCharUpper = true;
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i += 1;
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} else if (
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isLastCharUpper &&
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isLastLastCharUpper &&
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/[\p{Ll}]/u.test(character)
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) {
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result = `${result.slice(0, i - 1)}-${result.slice(i - 1)}`;
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isLastLastCharUpper = isLastCharUpper;
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isLastCharUpper = false;
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isLastCharLower = true;
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} else {
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isLastCharLower =
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character.toLowerCase() === character &&
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character.toUpperCase() !== character;
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isLastLastCharUpper = isLastCharUpper;
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isLastCharUpper =
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character.toUpperCase() === character &&
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character.toLowerCase() !== character;
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}
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}
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return result;
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};
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