106 lines
3.9 KiB
JavaScript
106 lines
3.9 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.stripLineComment = exports.minifyRawValues = exports.minifyRaw = exports.minifyCookedValues = exports.minifyCooked = exports.compressSymbols = void 0;
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var _difference = _interopRequireDefault(require("lodash/difference"));
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var _placeholderUtils = require("../css/placeholderUtils");
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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const injectUniquePlaceholders = strArr => {
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let i = 0;
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return strArr.reduce((str, val, index, arr) => {
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return str + val + (index < arr.length - 1 ? (0, _placeholderUtils.makePlaceholder)(i++) : '');
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}, '');
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};
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const makeMultilineCommentRegex = newlinePattern => new RegExp('\\/\\*[^!](.|' + newlinePattern + ')*?\\*\\/', 'g');
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const lineCommentStart = /\/\//g;
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const symbolRegex = /(\s*[;:{},]\s*)/g; // Counts occurences of substr inside str
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const countOccurences = (str, substr) => str.split(substr).length - 1; // Joins substrings until predicate returns true
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const reduceSubstr = (substrs, join, predicate) => {
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const length = substrs.length;
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let res = substrs[0];
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if (length === 1) {
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return res;
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}
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for (let i = 1; i < length; i++) {
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if (predicate(res)) {
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break;
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}
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res += join + substrs[i];
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}
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return res;
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}; // Joins at comment starts when it's inside a string or parantheses
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// effectively removing line comments
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const stripLineComment = line => reduceSubstr(line.split(lineCommentStart), '//', str => !str.endsWith(':') && // NOTE: This is another guard against urls, if they're not inside strings or parantheses.
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countOccurences(str, "'") % 2 === 0 && countOccurences(str, '"') % 2 === 0 && countOccurences(str, '(') === countOccurences(str, ')'));
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exports.stripLineComment = stripLineComment;
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const compressSymbols = code => code.split(symbolRegex).reduce((str, fragment, index) => {
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// Even-indices are non-symbol fragments
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if (index % 2 === 0) {
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return str + fragment;
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} // Only manipulate symbols outside of strings
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if (countOccurences(str, "'") % 2 !== 0 || countOccurences(str, '"') % 2 !== 0) {
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return str + fragment;
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} // Preserve whitespace preceding colon, to avoid joining selectors.
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if (/^\s+:/.test(fragment)) {
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return str + ' ' + fragment.trim();
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}
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return str + fragment.trim();
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}, ''); // Detects lines that are exclusively line comments
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exports.compressSymbols = compressSymbols;
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const isLineComment = line => line.trim().startsWith('//'); // Creates a minifier with a certain linebreak pattern
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const minify = linebreakPattern => {
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const linebreakRegex = new RegExp(linebreakPattern + '\\s*', 'g');
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const multilineCommentRegex = makeMultilineCommentRegex(linebreakPattern);
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return code => {
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const newCode = code.replace(multilineCommentRegex, '\n') // Remove multiline comments
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.split(linebreakRegex) // Split at newlines
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.filter(line => line.length > 0 && !isLineComment(line)) // Removes lines containing only line comments
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.map(stripLineComment) // Remove line comments inside text
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.join(' '); // Rejoin all lines
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const eliminatedExpressionIndices = (0, _difference.default)(code.match(_placeholderUtils.placeholderRegex), newCode.match(_placeholderUtils.placeholderRegex)).map(x => parseInt(x.match(/\d+/)[0], 10));
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return [compressSymbols(newCode), eliminatedExpressionIndices];
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};
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};
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const minifyRaw = minify('(?:\\\\r|\\\\n|\\r|\\n)');
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exports.minifyRaw = minifyRaw;
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const minifyCooked = minify('[\\r\\n]');
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exports.minifyCooked = minifyCooked;
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const minifyRawValues = rawValues => (0, _placeholderUtils.splitByPlaceholders)(minifyRaw(injectUniquePlaceholders(rawValues)), false);
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exports.minifyRawValues = minifyRawValues;
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const minifyCookedValues = cookedValues => (0, _placeholderUtils.splitByPlaceholders)(minifyCooked(injectUniquePlaceholders(cookedValues)), false);
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exports.minifyCookedValues = minifyCookedValues; |