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strings.ts ×101

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10556 tests · 4956 LOC · 26 files · introduces 0 tests · 542 LOC · 2 files

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src/vs/base/common/strings.ts 454 introduced LOC · 101 ranges

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1 > /*--------------------------------------------------------------------------------------------- strings.ts
2 > * Copyright (c) Microsoft Corporation. All rights reserved.
3 > * Licensed under the MIT License. See License.txt in the project root for license information.
4 > *--------------------------------------------------------------------------------------------*/
5 >
6 > import { LRUCachedFunction } from './cache.js';
7 > import { CharCode } from './charCode.js';
8 > import { Lazy } from './lazy.js';
9 > import { Constants } from './uint.js';
10 >
11 > export function isFalsyOrWhitespace(str: string | undefined): boolean {
12 if (!str || typeof str !== 'string') {
13 return true;
15 return str.trim().length === 0;
16 }
17 > strings.ts
18 > const _formatRegexp = /{(\d+)}/g;
19 >
20 > /**
21 > * Helper to produce a string with a variable number of arguments. Insert variable segments
22 > * into the string using the {n} notation where N is the index of the argument following the string.
23 > * @param value string to which formatting is applied
24 > * @param args replacements for {n}-entries
25 > */
26 > // eslint-disable-next-line @typescript-eslint/no-explicit-any
27 > export function format(value: string, ...args: any[]): string {
28 if (args.length === 0) {
29 return value;
36 });
37 }
38 > strings.ts
39 > const _format2Regexp = /{([^}]+)}/g;
40 >
41 > /**
42 > * Helper to create a string from a template and a string record.
43 > * Similar to `format` but with objects instead of positional arguments.
44 > */
45 > export function format2(template: string, values: Record<string, unknown>): string {
46 if (Object.keys(values).length === 0) {
47 return template;
49 return template.replace(_format2Regexp, (match, group) => (values[group] ?? match) as string);
50 }
51 > strings.ts
52 > /**
53 > * Encodes the given value so that it can be used as literal value in html attributes.
54 > *
55 > * In other words, computes `$val`, such that `attr` in `<div attr="$val" />` has the runtime value `value`.
56 > * This prevents XSS injection.
57 > */
58 > export function htmlAttributeEncodeValue(value: string): string {
59 return value.replace(/[<>"'&]/g, ch => {
60 switch (ch) {
68 });
69 }
70 > strings.ts
71 > /**
72 > * Converts HTML characters inside the string to use entities instead. Makes the string safe from
73 > * being used e.g. in HTMLElement.innerHTML.
74 > */
75 > export function escape(html: string): string {
76 return html.replace(/[<>&]/g, function (match) {
77 switch (match) {
83 });
84 }
85 > strings.ts
86 > /**
87 > * Escapes regular expression characters in a given string
88 > */
89 > export function escapeRegExpCharacters(value: string): string {
90 return value.replace(/[\\\{\}\*\+\?\|\^\$\.\[\]\(\)]/g, '\\$&');
91 }
92 > strings.ts
93 > /**
94 > * Counts how often `substr` occurs inside `value`.
95 > */
96 > export function count(value: string, substr: string): number {
97 let result = 0;
98 let index = value.indexOf(substr);
103 return result;
104 }
105 > strings.ts
106 > export function truncate(value: string, maxLength: number, suffix = Ellipsis): string {
107 if (value.length <= maxLength) {
108 return value;
111 return `${value.substr(0, maxLength)}${suffix}`;
112 }
113 > strings.ts
114 > export function truncateMiddle(value: string, maxLength: number, suffix = Ellipsis): string {
115 if (value.length <= maxLength) {
116 return value;
122 return `${value.substr(0, prefixLength)}${suffix}${value.substr(value.length - suffixLength)}`;
123 }
124 > strings.ts
125 > /**
126 > * Removes all occurrences of needle from the beginning and end of haystack.
127 > * @param haystack string to trim
128 > * @param needle the thing to trim (default is a blank)
129 > */
130 > export function trim(haystack: string, needle: string = ' '): string {
131 const trimmed = ltrim(haystack, needle);
132 return rtrim(trimmed, needle);
133 }
134 > strings.ts
135 > /**
136 > * Removes all occurrences of needle from the beginning of haystack.
137 > * @param haystack string to trim
138 > * @param needle the thing to trim
139 > */
140 > export function ltrim(haystack: string, needle: string): string {
141 if (!haystack || !needle) {
142 return haystack;
157 return haystack.substring(offset);
158 }
159 > strings.ts
160 > /**
161 > * Removes all occurrences of needle from the end of haystack.
162 > * @param haystack string to trim
163 > * @param needle the thing to trim
164 > */
165 > export function rtrim(haystack: string, needle: string): string {
166 if (!haystack || !needle) {
167 return haystack;
187 return haystack.substring(0, offset);
188 }
189 > strings.ts
190 > export function convertSimple2RegExpPattern(pattern: string): string {
191 return pattern.replace(/[\-\\\{\}\+\?\|\^\$\.\,\[\]\(\)\#\s]/g, '\\$&').replace(/[\*]/g, '.*');
192 }
193 > strings.ts
194 > export interface RegExpOptions {
195 > matchCase?: boolean;
196 > wholeWord?: boolean;
197 > multiline?: boolean;
198 > global?: boolean;
199 > unicode?: boolean;
200 > }
201 >
202 > export function createRegExp(searchString: string, isRegex: boolean, options: RegExpOptions = {}): RegExp {
203 if (!searchString) {
204 throw new Error('Cannot create regex from empty string');
231 return new RegExp(searchString, modifiers);
232 }
233 > strings.ts
234 > export function regExpLeadsToEndlessLoop(regexp: RegExp): boolean {
235 // Exit early if it's one of these special cases which are meant to match
236 // against an empty string
244 return !!(match && regexp.lastIndex === 0);
245 }
246 > strings.ts
247 > export function joinStrings(items: (string | undefined | null | false)[], separator: string): string {
248 return items.filter(item => item !== undefined && item !== null && item !== false).join(separator);
249 }
250 > strings.ts
251 > export function splitLines(str: string): string[] {
252 return str.split(/\r\n|\r|\n/);
253 }
254 > strings.ts
255 > export function splitLinesIncludeSeparators(str: string): string[] {
256 const linesWithSeparators: string[] = [];
257 const splitLinesAndSeparators = str.split(/(\r\n|\r|\n)/);
261 return linesWithSeparators;
262 }
263 > strings.ts
264 > export function indexOfPattern(str: string, re: RegExp) {
265 const match = re.exec(str);
266 if (match) {
269 return -1;
270 }
271 > strings.ts
272 > /**
273 > * Returns first index of the string that is not whitespace.
274 > * If string is empty or contains only whitespaces, returns -1
275 > */
276 > export function firstNonWhitespaceIndex(str: string): number {
277 for (let i = 0, len = str.length; i < len; i++) {
278 const chCode = str.charCodeAt(i);
283 return -1;
284 }
285 > strings.ts
286 > /**
287 > * Returns the leading whitespace of the string.
288 > * If the string contains only whitespaces, returns entire string
289 > */
290 > export function getLeadingWhitespace(str: string, start: number = 0, end: number = str.length): string {
291 for (let i = start; i < end; i++) {
292 const chCode = str.charCodeAt(i);
297 return str.substring(start, end);
298 }
299 > strings.ts
300 > /**
301 > * Returns last index of the string that is not whitespace.
302 > * If string is empty or contains only whitespaces, returns -1
303 > */
304 > export function lastNonWhitespaceIndex(str: string, startIndex: number = str.length - 1): number {
305 for (let i = startIndex; i >= 0; i--) {
306 const chCode = str.charCodeAt(i);
311 return -1;
312 }
313 > strings.ts
314 > export function getIndentationLength(str: string): number {
315 const idx = firstNonWhitespaceIndex(str);
316 if (idx === -1) { return str.length; }
317 return idx;
318 }
319 > strings.ts
320 > /**
321 > * Function that works identically to String.prototype.replace, except, the
322 > * replace function is allowed to be async and return a Promise.
323 > */
324 > export function replaceAsync(str: string, search: RegExp, replacer: (match: string, ...args: unknown[]) => Promise<string>): Promise<string> {
325 const parts: (string | Promise<string>)[] = [];
326
340 return Promise.all(parts).then(p => p.join(''));
341 }
342 > strings.ts
343 > export function compare(a: string, b: string): number {
344 if (a < b) {
345 return -1;
350 }
351 }
352 > strings.ts
353 > export function compareSubstring(a: string, b: string, aStart: number = 0, aEnd: number = a.length, bStart: number = 0, bEnd: number = b.length): number {
354 for (; aStart < aEnd && bStart < bEnd; aStart++, bStart++) {
355 const codeA = a.charCodeAt(aStart);
370 return 0;
371 }
372 > strings.ts
373 > export function compareIgnoreCase(a: string, b: string): number {
374 return compareSubstringIgnoreCase(a, b, 0, a.length, 0, b.length);
375 }
376 > strings.ts
377 > export function compareSubstringIgnoreCase(a: string, b: string, aStart: number = 0, aEnd: number = a.length, bStart: number = 0, bEnd: number = b.length): number {
378
379 for (; aStart < aEnd && bStart < bEnd; aStart++, bStart++) {
421 return 0;
422 }
423 > strings.ts
424 > export function isAsciiDigit(code: number): boolean {
425 return code >= CharCode.Digit0 && code <= CharCode.Digit9;
426 }
427 > strings.ts
428 > export function isLowerAsciiLetter(code: number): boolean {
429 return code >= CharCode.a && code <= CharCode.z;
430 }
431 > strings.ts
432 > export function isUpperAsciiLetter(code: number): boolean {
433 return code >= CharCode.A && code <= CharCode.Z;
434 }
435 > strings.ts
436 > export function equalsIgnoreCase(a: string, b: string): boolean {
437 return a.length === b.length && compareSubstringIgnoreCase(a, b) === 0;
438 }
439 > strings.ts
440 > export function equals(a: string | undefined, b: string | undefined, ignoreCase?: boolean): boolean {
441 return a === b || (!!ignoreCase && a !== undefined && b !== undefined && equalsIgnoreCase(a, b));
442 }
443 > strings.ts
444 > export function startsWithIgnoreCase(str: string, candidate: string): boolean {
445 const len = candidate.length;
446 return len <= str.length && compareSubstringIgnoreCase(str, candidate, 0, len) === 0;
447 }
448 > strings.ts
449 > export function endsWithIgnoreCase(str: string, candidate: string): boolean {
450 const len = str.length;
451 const start = len - candidate.length;
452 return start >= 0 && compareSubstringIgnoreCase(str, candidate, start, len) === 0;
453 }
454 > strings.ts
455 > /**
456 > * @returns the length of the common prefix of the two strings.
457 > */
458 > export function commonPrefixLength(a: string, b: string): number {
459
460 const len = Math.min(a.length, b.length);
469 return len;
470 }
471 > strings.ts
472 > /**
473 > * @returns the length of the common suffix of the two strings.
474 > */
475 > export function commonSuffixLength(a: string, b: string): number {
476
477 const len = Math.min(a.length, b.length);
489 return len;
490 }
491 > strings.ts
492 > /**
493 > * See http://en.wikipedia.org/wiki/Surrogate_pair
494 > */
495 > export function isHighSurrogate(charCode: number): boolean {
496 return (0xD800 <= charCode && charCode <= 0xDBFF);
497 }
498 > strings.ts
499 > /**
500 > * See http://en.wikipedia.org/wiki/Surrogate_pair
501 > */
502 > export function isLowSurrogate(charCode: number): boolean {
503 return (0xDC00 <= charCode && charCode <= 0xDFFF);
504 }
505 > strings.ts
506 > /**
507 > * See http://en.wikipedia.org/wiki/Surrogate_pair
508 > */
509 > export function computeCodePoint(highSurrogate: number, lowSurrogate: number): number {
510 return ((highSurrogate - 0xD800) << 10) + (lowSurrogate - 0xDC00) + 0x10000;
511 }
512 > strings.ts
513 > /**
514 > * get the code point that begins at offset `offset`
515 > */
516 > export function getNextCodePoint(str: string, len: number, offset: number): number {
517 const charCode = str.charCodeAt(offset);
518 if (isHighSurrogate(charCode) && offset + 1 < len) {
524 return charCode;
525 }
526 > strings.ts
527 > /**
528 > * get the code point that ends right before offset `offset`
529 > */
530 function getPrevCodePoint(str: string, offset: number): number {
531 const charCode = str.charCodeAt(offset - 1);
538 return charCode;
539 }
540 > strings.ts
541 > export class CodePointIterator {
542 >
543 > private readonly _str: string;
544 > private readonly _len: number;
545 > private _offset: number;
546 >
547 > public get offset(): number {
548 return this._offset;
549 }
550 > strings.ts
551 > constructor(str: string, offset: number = 0) {
552 this._str = str;
553 this._len = str.length;
554 this._offset = offset;
555 }
556 > strings.ts
557 > public setOffset(offset: number): void {
558 this._offset = offset;
559 }
560 > strings.ts
561 > public prevCodePoint(): number {
562 const codePoint = getPrevCodePoint(this._str, this._offset);
563 this._offset -= (codePoint >= Constants.UNICODE_SUPPLEMENTARY_PLANE_BEGIN ? 2 : 1);
564 return codePoint;
565 }
566 > strings.ts
567 > public nextCodePoint(): number {
568 const codePoint = getNextCodePoint(this._str, this._len, this._offset);
569 this._offset += (codePoint >= Constants.UNICODE_SUPPLEMENTARY_PLANE_BEGIN ? 2 : 1);
570 return codePoint;
571 }
572 > strings.ts
573 > public eol(): boolean {
574 return (this._offset >= this._len);
575 }
576 > } strings.ts
577 >
578 > export class GraphemeIterator {
579 >
580 > private readonly _iterator: CodePointIterator;
581 >
582 > public get offset(): number {
583 return this._iterator.offset;
584 }
585 > strings.ts
586 > constructor(str: string, offset: number = 0) {
587 this._iterator = new CodePointIterator(str, offset);
588 }
589 > strings.ts
590 > public nextGraphemeLength(): number {
591 const graphemeBreakTree = GraphemeBreakTree.getInstance();
592 const iterator = this._iterator;
606 return (iterator.offset - initialOffset);
607 }
608 > strings.ts
609 > public prevGraphemeLength(): number {
610 const graphemeBreakTree = GraphemeBreakTree.getInstance();
611 const iterator = this._iterator;
625 return (initialOffset - iterator.offset);
626 }
627 > strings.ts
628 > public eol(): boolean {
629 return this._iterator.eol();
630 }
631 > } strings.ts
632 >
633 > export function nextCharLength(str: string, initialOffset: number): number {
634 const iterator = new GraphemeIterator(str, initialOffset);
635 return iterator.nextGraphemeLength();
636 }
637 > strings.ts
638 > export function prevCharLength(str: string, initialOffset: number): number {
639 const iterator = new GraphemeIterator(str, initialOffset);
640 return iterator.prevGraphemeLength();
641 }
642 > strings.ts
643 > export function getCharContainingOffset(str: string, offset: number): [number, number] {
644 if (offset > 0 && isLowSurrogate(str.charCodeAt(offset))) {
645 offset--;
649 return [startOffset, endOffset];
650 }
651 > strings.ts
652 > export function charCount(str: string): number {
653 const iterator = new GraphemeIterator(str);
654 let length = 0;
659 return length;
660 }
661 > strings.ts
662 > let CONTAINS_RTL: RegExp | undefined = undefined;
663 >
664 function makeContainsRtl() {
665 // Generated using https://github.com/alexdima/unicode-utils/blob/main/rtl-test.js
666 return /(?:[\u05BE\u05C0\u05C3\u05C6\u05D0-\u05F4\u0608\u060B\u060D\u061B-\u064A\u066D-\u066F\u0671-\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u0710\u0712-\u072F\u074D-\u07A5\u07B1-\u07EA\u07F4\u07F5\u07FA\u07FE-\u0815\u081A\u0824\u0828\u0830-\u0858\u085E-\u088E\u08A0-\u08C9\u200F\uFB1D\uFB1F-\uFB28\uFB2A-\uFD3D\uFD50-\uFDC7\uFDF0-\uFDFC\uFE70-\uFEFC]|\uD802[\uDC00-\uDD1B\uDD20-\uDE00\uDE10-\uDE35\uDE40-\uDEE4\uDEEB-\uDF35\uDF40-\uDFFF]|\uD803[\uDC00-\uDD23\uDE80-\uDEA9\uDEAD-\uDF45\uDF51-\uDF81\uDF86-\uDFF6]|\uD83A[\uDC00-\uDCCF\uDD00-\uDD43\uDD4B-\uDFFF]|\uD83B[\uDC00-\uDEBB])/;
667 }
668 > strings.ts
669 > /**
670 > * Returns true if `str` contains any Unicode character that is classified as "R" or "AL".
671 > */
672 > export function containsRTL(str: string): boolean {
673 if (!CONTAINS_RTL) {
674 CONTAINS_RTL = makeContainsRtl();
677 return CONTAINS_RTL.test(str);
678 }
679 > strings.ts
680 > const IS_BASIC_ASCII = /^[\t\n\r\x20-\x7E]*$/;
681 > /**
682 > * Returns true if `str` contains only basic ASCII characters in the range 32 - 126 (including 32 and 126) or \n, \r, \t
683 > */
684 > export function isBasicASCII(str: string): boolean {
685 return IS_BASIC_ASCII.test(str);
686 }
687 > strings.ts
688 > export const UNUSUAL_LINE_TERMINATORS = /[\u2028\u2029]/; // LINE SEPARATOR (LS) or PARAGRAPH SEPARATOR (PS)
689 > /**
690 > * Returns true if `str` contains unusual line terminators, like LS or PS
691 > */
692 > export function containsUnusualLineTerminators(str: string): boolean {
693 return UNUSUAL_LINE_TERMINATORS.test(str);
694 }
695 > strings.ts
696 > export function isFullWidthCharacter(charCode: number): boolean {
697 // Do a cheap trick to better support wrapping of wide characters, treat them as 2 columns
698 // http://jrgraphix.net/research/unicode_blocks.php
741 );
742 }
743 > strings.ts
744 > /**
745 > * A fast function (therefore imprecise) to check if code points are emojis.
746 > * Generated using https://github.com/alexdima/unicode-utils/blob/main/emoji-test.js
747 > */
748 > export function isEmojiImprecise(x: number): boolean {
749 return (
750 (x >= 0x1F1E6 && x <= 0x1F1FF) || (x === 8986) || (x === 8987) || (x === 9200)
755 );
756 }
757 > strings.ts
758 > /**
759 > * Given a string and a max length returns a shorted version. Shorting
760 > * happens at favorable positions - such as whitespace or punctuation characters.
761 > * The return value can be longer than the given value of `n`. Leading whitespace is always trimmed.
762 > */
763 > export function lcut(text: string, n: number, prefix = ''): string {
764 const trimmed = text.trimStart();
765
785 return prefix + trimmed.substring(i).trimStart();
786 }
787 > strings.ts
788 > /**
789 > * Given a string and a max length returns a shortened version keeping the beginning.
790 > * Shortening happens at favorable positions - such as whitespace or punctuation characters.
791 > * Trailing whitespace is always trimmed.
792 > */
793 > export function rcut(text: string, n: number, suffix = ''): string {
794 const trimmed = text.trimEnd();
795
832 return result + suffix;
833 }
834 > strings.ts
835 > // Defacto standard: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
836 > const CSI_SEQUENCE = /(?:\x1b\[|\x9b)[=?>!]?[\d;:]*["$#'* ]?[a-zA-Z@^`{}|~]/;
837 > const OSC_SEQUENCE = /(?:\x1b\]|\x9d).*?(?:\x1b\\|\x07|\x9c)/;
838 > const ESC_SEQUENCE = /\x1b(?:[ #%\(\)\*\+\-\.\/]?[a-zA-Z0-9\|}~@])/;
839 > const CONTROL_SEQUENCES = new RegExp('(?:' + [
840 > CSI_SEQUENCE.source,
841 > OSC_SEQUENCE.source,
842 > ESC_SEQUENCE.source,
843 > ].join('|') + ')', 'g');
844 >
845 > /** Iterates over parts of a string with CSI sequences */
846 > export function* forAnsiStringParts(str: string) {
847 let last = 0;
848 for (const match of str.matchAll(CONTROL_SEQUENCES)) {
859 }
860 }
861 > strings.ts
862 > /**
863 > * Strips ANSI escape sequences from a string.
864 > * @param str The dastringa stringo strip the ANSI escape sequences from.
865 > *
866 > * @example
867 > * removeAnsiEscapeCodes('\u001b[31mHello, World!\u001b[0m');
868 > * // 'Hello, World!'
869 > */
870 > export function removeAnsiEscapeCodes(str: string): string {
871 if (str) {
872 str = str.replace(CONTROL_SEQUENCES, '');
875 return str;
876 }
877 > strings.ts
878 > const PROMPT_NON_PRINTABLE = /\\\[.*?\\\]/g;
879 >
880 > /**
881 > * Strips ANSI escape sequences from a UNIX-style prompt string (eg. `$PS1`).
882 > * @param str The string to strip the ANSI escape sequences from.
883 > *
884 > * @example
885 > * removeAnsiEscapeCodesFromPrompt('\n\\[\u001b[01;34m\\]\\w\\[\u001b[00m\\]\n\\[\u001b[1;32m\\]> \\[\u001b[0m\\]');
886 > * // '\n\\w\n> '
887 > */
888 > export function removeAnsiEscapeCodesFromPrompt(str: string): string {
889 return removeAnsiEscapeCodes(str).replace(PROMPT_NON_PRINTABLE, '');
890 }
891 > strings.ts
892 >
893 > // -- UTF-8 BOM
894 >
895 > export const UTF8_BOM_CHARACTER = String.fromCharCode(CharCode.UTF8_BOM);
896 >
897 > export function startsWithUTF8BOM(str: string): boolean {
898 return !!(str && str.length > 0 && str.charCodeAt(0) === CharCode.UTF8_BOM);
899 }
900 > strings.ts
901 > export function stripUTF8BOM(str: string): string {
902 return startsWithUTF8BOM(str) ? str.substr(1) : str;
903 }
904 > strings.ts
905 > /**
906 > * Checks if the characters of the provided query string are included in the
907 > * target string. The characters do not have to be contiguous within the string.
908 > */
909 > export function fuzzyContains(target: string, query: string): boolean {
910 if (!target || !query) {
911 return false; // return early if target or query are undefined
936 return true;
937 }
938 > strings.ts
939 > export function containsUppercaseCharacter(target: string, ignoreEscapedChars = false): boolean {
940 if (!target) {
941 return false;
948 return target.toLowerCase() !== target;
949 }
950 > strings.ts
951 > export function uppercaseFirstLetter(str: string): string {
952 return str.charAt(0).toUpperCase() + str.slice(1);
953 }
954 > strings.ts
955 > export function getNLines(str: string, n = 1): string {
956 if (n === 0) {
957 return '';
974 return str.substr(0, idx);
975 }
976 > strings.ts
977 > /**
978 > * Produces 'a'-'z', followed by 'A'-'Z'... followed by 'a'-'z', etc.
979 > */
980 > export function singleLetterHash(n: number): string {
981 const LETTERS_CNT = (CharCode.Z - CharCode.A + 1);
982
989 return String.fromCharCode(CharCode.A + n - LETTERS_CNT);
990 }
991 > strings.ts
992 > //#region Unicode Grapheme Break
993 >
994 > export function getGraphemeBreakType(codePoint: number): GraphemeBreakType {
995 const graphemeBreakTree = GraphemeBreakTree.getInstance();
996 return graphemeBreakTree.getGraphemeBreakType(codePoint);
997 }
998 > strings.ts
999 function breakBetweenGraphemeBreakType(breakTypeA: GraphemeBreakType, breakTypeB: GraphemeBreakType): boolean {
1000 // http://www.unicode.org/reports/tr29/#Grapheme_Cluster_Boundary_Rules
1076 return true;
1077 }
1078 > strings.ts
1079 > export const enum GraphemeBreakType {
1080 > Other = 0,
1081 > Prepend = 1,
1082 > CR = 2,
1083 > LF = 3,
1084 > Control = 4,
1085 > Extend = 5,
1086 > Regional_Indicator = 6,
1087 > SpacingMark = 7,
1088 > L = 8,
1089 > V = 9,
1090 > T = 10,
1091 > LV = 11,
1092 > LVT = 12,
1093 > ZWJ = 13,
1094 > Extended_Pictographic = 14
1095 > }
1096 >
1097 > class GraphemeBreakTree {
1098 >
1099 > private static _INSTANCE: GraphemeBreakTree | null = null;
1100 > public static getInstance(): GraphemeBreakTree {
1101 if (!GraphemeBreakTree._INSTANCE) {
1102 GraphemeBreakTree._INSTANCE = new GraphemeBreakTree();
1104 return GraphemeBreakTree._INSTANCE;
1105 }
1106 > strings.ts
1107 > private readonly _data: number[];
1108 >
1109 > constructor() {
1110 this._data = getGraphemeBreakRawData();
1111 }
1112 > strings.ts
1113 > public getGraphemeBreakType(codePoint: number): GraphemeBreakType {
1114 // !!! Let's make 7bit ASCII a bit faster: 0..31
1115 if (codePoint < 32) {
1145 return GraphemeBreakType.Other;
1146 }
1147 > } strings.ts
1148 >
1149 function getGraphemeBreakRawData(): number[] {
1150 // generated using https://github.com/alexdima/unicode-utils/blob/main/grapheme-break.js
1151 return 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1152 }
1153 > strings.ts
1154 > //#endregion
1155 >
1156 > /**
1157 > * Computes the offset after performing a left delete on the given string,
1158 > * while considering unicode grapheme/emoji rules.
1159 > */
1160 > export function getLeftDeleteOffset(offset: number, str: string): number {
1161 if (offset === 0) {
1162 return 0;
1174 return iterator.offset;
1175 }
1176 > strings.ts
1177 function getOffsetBeforeLastEmojiComponent(initialOffset: number, str: string): number | undefined {
1178 // See https://www.unicode.org/reports/tr51/tr51-14.html#EBNF_and_Regex for the
1210 return resultOffset;
1211 }
1212 > strings.ts
1213 function isEmojiModifier(codePoint: number): boolean {
1214 return 0x1F3FB <= codePoint && codePoint <= 0x1F3FF;
1215 }
1216 > strings.ts
1217 > const enum CodePoint {
1218 > zwj = 0x200D,
1219 >
1220 > /**
1221 > * Variation Selector-16 (VS16)
1222 > */
1223 > emojiVariantSelector = 0xFE0F,
1224 >
1225 > /**
1226 > * Combining Enclosing Keycap
1227 > */
1228 > enclosingKeyCap = 0x20E3,
1229 >
1230 > space = 0x0020,
1231 > }
1232 >
1233 > export const noBreakWhitespace = '\xa0';
1234 >
1235 > export class AmbiguousCharacters {
1236 > private static readonly ambiguousCharacterData = new Lazy<
1237 > Record<
1238 > string | '_common' | '_default',
1239 > /* code point -> ascii code point */ number[]
1240 > >
1241 > >(() => {
1242 // Generated using https://github.com/hediet/vscode-unicode-data
1243 // Stored as key1, value1, key2, value2, ...
1245 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1246 );
1247 > }); strings.ts
1248 >
1249 > private static readonly cache = new LRUCachedFunction<string, AmbiguousCharacters>((localesStr) => {
1250 const locales = localesStr.split(',');
1251
1304
1305 return new AmbiguousCharacters(map);
1306 > }); strings.ts
1307 >
1308 > public static getInstance(locales: Iterable<string>): AmbiguousCharacters {
1309 return AmbiguousCharacters.cache.get(Array.from(locales).join(','));
1310 }
1311 > strings.ts
1312 > private static _locales = new Lazy<string[]>(() =>
1313 Object.keys(AmbiguousCharacters.ambiguousCharacterData.value).filter(
1314 (k) => !k.startsWith('_')
1315 )
1316 > ); strings.ts
1317 > public static getLocales(): string[] {
1318 return AmbiguousCharacters._locales.value;
1319 }
1320 > strings.ts
1321 > private constructor(
1322 private readonly confusableDictionary: Map<number, number>
1323 ) { }
1324 > strings.ts
1325 > public isAmbiguous(codePoint: number): boolean {
1326 return this.confusableDictionary.has(codePoint);
1327 }
1328 > strings.ts
1329 > public containsAmbiguousCharacter(str: string): boolean {
1330 for (let i = 0; i < str.length; i++) {
1331 const codePoint = str.codePointAt(i);
1336 return false;
1337 }
1338 > strings.ts
1339 > /**
1340 > * Returns the non basic ASCII code point that the given code point can be confused,
1341 > * or undefined if such code point does note exist.
1342 > */
1343 > public getPrimaryConfusable(codePoint: number): number | undefined {
1344 return this.confusableDictionary.get(codePoint);
1345 }
1346 > strings.ts
1347 > public getConfusableCodePoints(): ReadonlySet<number> {
1348 return new Set(this.confusableDictionary.keys());
1349 }
1350 > } strings.ts
1351 >
1352 > export class InvisibleCharacters {
1353 > private static getRawData(): Record<string | '_common', number[]> {
1354 // Generated using https://github.com/hediet/vscode-unicode-data
1355 return JSON.parse('{\"_common\":[11,12,13,127,847,1564,4447,4448,6068,6069,6155,6156,6157,6158,7355,7356,8192,8193,8194,8195,8196,8197,8198,8199,8200,8201,8202,8204,8205,8206,8207,8234,8235,8236,8237,8238,8239,8287,8288,8289,8290,8291,8292,8293,8294,8295,8296,8297,8298,8299,8300,8301,8302,8303,10240,12644,65024,65025,65026,65027,65028,65029,65030,65031,65032,65033,65034,65035,65036,65037,65038,65039,65279,65440,65520,65521,65522,65523,65524,65525,65526,65527,65528,65532,78844,119155,119156,119157,119158,119159,119160,119161,119162,917504,917505,917506,917507,917508,917509,917510,917511,917512,917513,917514,917515,917516,917517,917518,917519,917520,917521,917522,917523,917524,917525,917526,917527,917528,917529,917530,917531,917532,917533,917534,917535,917536,917537,917538,917539,917540,917541,917542,917543,917544,917545,917546,917547,917548,917549,917550,917551,917552,917553,917554,917555,917556,917557,917558,917559,917560,917561,917562,917563,917564,917565,917566,917567,917568,917569,917570,917571,917572,917573,917574,917575,917576,917577,917578,917579,917580,917581,917582,917583,917584,917585,917586,917587,917588,917589,917590,917591,917592,917593,917594,917595,917596,917597,917598,917599,917600,917601,917602,917603,917604,917605,917606,917607,917608,917609,917610,917611,917612,917613,917614,917615,917616,917617,917618,917619,917620,917621,917622,917623,917624,917625,917626,917627,917628,917629,917630,917631,917760,917761,917762,917763,917764,917765,917766,917767,917768,917769,917770,917771,917772,917773,917774,917775,917776,917777,917778,917779,917780,917781,917782,917783,917784,917785,917786,917787,917788,917789,917790,917791,917792,917793,917794,917795,917796,917797,917798,917799,917800,917801,917802,917803,917804,917805,917806,917807,917808,917809,917810,917811,917812,917813,917814,917815,917816,917817,917818,917819,917820,917821,917822,917823,917824,917825,917826,917827,917828,917829,917830,917831,917832,917833,917834,917835,917836,917837,917838,917839,917840,917841,917842,917843,917844,917845,917846,917847,917848,917849,917850,917851,917852,917853,917854,917855,917856,917857,917858,917859,917860,917861,917862,917863,917864,917865,917866,917867,917868,917869,917870,917871,917872,917873,917874,917875,917876,917877,917878,917879,917880,917881,917882,917883,917884,917885,917886,917887,917888,917889,917890,917891,917892,917893,917894,917895,917896,917897,917898,917899,917900,917901,917902,917903,917904,917905,917906,917907,917908,917909,917910,917911,917912,917913,917914,917915,917916,917917,917918,917919,917920,917921,917922,917923,917924,917925,917926,917927,917928,917929,917930,917931,917932,917933,917934,917935,917936,917937,917938,917939,917940,917941,917942,917943,917944,917945,917946,917947,917948,917949,917950,917951,917952,917953,917954,917955,917956,917957,917958,917959,917960,917961,917962,917963,917964,917965,917966,917967,917968,917969,917970,917971,917972,917973,917974,917975,917976,917977,917978,917979,917980,917981,917982,917983,917984,917985,917986,917987,917988,917989,917990,917991,917992,917993,917994,917995,917996,917997,917998,917999],\"cs\":[173,8203,12288],\"de\":[173,8203,12288],\"es\":[8203,12288],\"fr\":[173,8203,12288],\"it\":[160,173,12288],\"ja\":[173],\"ko\":[173,12288],\"pl\":[173,8203,12288],\"pt-BR\":[173,8203,12288],\"qps-ploc\":[160,173,8203,12288],\"ru\":[173,12288],\"tr\":[160,173,8203,12288],\"zh-hans\":[160,173,8203,12288],\"zh-hant\":[173,12288]}');
1356 }
1357 > strings.ts
1358 > private static _data: Set<number> | undefined = undefined;
1359 >
1360 > private static getData() {
1361 if (!this._data) {
1362 this._data = new Set([...Object.values(InvisibleCharacters.getRawData())].flat());
1364 return this._data;
1365 }
1366 > strings.ts
1367 > public static isInvisibleCharacter(codePoint: number): boolean {
1368 return InvisibleCharacters.getData().has(codePoint);
1369 }
1370 > strings.ts
1371 > public static containsInvisibleCharacter(str: string): boolean {
1372 for (let i = 0; i < str.length; i++) {
1373 const codePoint = str.codePointAt(i);
1378 return false;
1379 }
1380 > strings.ts
1381 > public static get codePoints(): ReadonlySet<number> {
1382 return InvisibleCharacters.getData();
1383 }
1384 > } strings.ts
1385 >
1386 > export const Ellipsis = '\u2026';
1387 >
1388 > /**
1389 > * Convert a Unicode string to a string in which each 16-bit unit occupies only one byte
1390 > *
1391 > * From https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/btoa
1392 > */
1393 function toBinary(str: string): string {
1394 const codeUnits = new Uint16Array(str.length);
1403 return binary;
1404 }
1405 > strings.ts
1406 > /**
1407 > * Version of the global `btoa` function that handles multi-byte characters instead
1408 > * of throwing an exception.
1409 > */
1410 >
1411 > export function multibyteAwareBtoa(str: string): string {
1412 return btoa(toBinary(str));
1413 }
src/vs/base/common/cache.ts 88 introduced LOC · 9 ranges

Open complete file

1 > /*--------------------------------------------------------------------------------------------- cache.ts
2 > * Copyright (c) Microsoft Corporation. All rights reserved.
3 > * Licensed under the MIT License. See License.txt in the project root for license information.
4 > *--------------------------------------------------------------------------------------------*/
5 >
6 > import { CancellationToken, CancellationTokenSource } from './cancellation.js';
7 > import { IDisposable } from './lifecycle.js';
8 >
9 > export interface CacheResult<T> extends IDisposable {
10 > promise: Promise<T>;
11 > }
12 >
13 > export class Cache<T> {
14 >
15 > private result: CacheResult<T> | null = null;
16 > constructor(private task: (ct: CancellationToken) => Promise<T>) { }
17 >
18 > get(): CacheResult<T> {
19 if (this.result) {
20 return this.result;
35 return this.result;
36 }
37 > } cache.ts
38 >
39 > export function identity<T>(t: T): T {
40 return t;
41 }
42 > cache.ts
43 > interface ICacheOptions<TArg> {
44 > /**
45 > * The cache key is used to identify the cache entry.
46 > * Strict equality is used to compare cache keys.
47 > */
48 > getCacheKey: (arg: TArg) => unknown;
49 > }
50 >
51 > /**
52 > * Uses a LRU cache to make a given parametrized function cached.
53 > * Caches just the last key/value.
54 > */
55 > export class LRUCachedFunction<TArg, TComputed> {
56 > private lastCache: TComputed | undefined = undefined;
57 > private lastArgKey: unknown | undefined = undefined;
58 >
59 > private readonly _fn: (arg: TArg) => TComputed;
60 > private readonly _computeKey: (arg: TArg) => unknown;
61 >
62 > constructor(fn: (arg: TArg) => TComputed);
63 > constructor(options: ICacheOptions<TArg>, fn: (arg: TArg) => TComputed);
64 > constructor(arg1: ICacheOptions<TArg> | ((arg: TArg) => TComputed), arg2?: (arg: TArg) => TComputed) {
65 > if (typeof arg1 === 'function') {
66 > this._fn = arg1;
67 > this._computeKey = identity;
68 > } else {
69 this._fn = arg2!;
70 this._computeKey = arg1.getCacheKey;
71 }
72 > } cache.ts
73 >
74 > public get(arg: TArg): TComputed {
75 const key = this._computeKey(arg);
76 if (this.lastArgKey !== key) {
80 return this.lastCache!;
81 }
82 > } cache.ts
83 >
84 > /**
85 > * Uses an unbounded cache to memoize the results of the given function.
86 > */
87 > export class CachedFunction<TArg, TComputed> {
88 > private readonly _map = new Map<TArg, TComputed>();
89 > private readonly _map2 = new Map<unknown, TComputed>();
90 > public get cachedValues(): ReadonlyMap<TArg, TComputed> {
91 > return this._map;
92 > }
93 >
94 > private readonly _fn: (arg: TArg) => TComputed;
95 > private readonly _computeKey: (arg: TArg) => unknown;
96 >
97 > constructor(fn: (arg: TArg) => TComputed);
98 > constructor(options: ICacheOptions<TArg>, fn: (arg: TArg) => TComputed);
99 > constructor(arg1: ICacheOptions<TArg> | ((arg: TArg) => TComputed), arg2?: (arg: TArg) => TComputed) {
100 if (typeof arg1 === 'function') {
101 this._fn = arg1;
106 }
107 }
108 > cache.ts
109 > public get(arg: TArg): TComputed {
110 const key = this._computeKey(arg);
111 if (this._map2.has(key)) {
118 return value;
119 }
120 > } cache.ts
121 >
122 > /**
123 > * Uses an unbounded cache to memoize the results of the given function.
124 > */
125 > export class WeakCachedFunction<TArg, TComputed> {
126 > private readonly _map = new WeakMap<WeakKey, TComputed>();
127 >
128 > private readonly _fn: (arg: TArg) => TComputed;
129 > private readonly _computeKey: (arg: TArg) => unknown;
130 >
131 > constructor(fn: (arg: TArg) => TComputed);
132 > constructor(options: ICacheOptions<TArg>, fn: (arg: TArg) => TComputed);
133 > constructor(arg1: ICacheOptions<TArg> | ((arg: TArg) => TComputed), arg2?: (arg: TArg) => TComputed) {
134 if (typeof arg1 === 'function') {
135 this._fn = arg1;
140 }
141 }
142 > cache.ts
143 > public get(arg: TArg): TComputed {
144 const key = this._computeKey(arg) as WeakKey;
145 if (this._map.has(key)) {
151 return value;
152 }
153 > } cache.ts

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