src/vs/workbench/services/search/common/replace.ts
284 LOC · 272 covered · 12 uncovered · 73 ranges · 22 concepts · 20 introducers · 8 tests
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/*---------------------------------------------------------------------------------------------
replace.ts ×15
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import * as strings from '../../../../base/common/strings.js';
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import { IPatternInfo } from './search.js';
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import { CharCode } from '../../../../base/common/charCode.js';
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import { buildReplaceStringWithCasePreserved } from '../../../../base/common/search.js';
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export class ReplacePattern {
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private _replacePattern: string;
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private _hasParameters: boolean = false;
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private _regExp: RegExp;
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private _caseOpsRegExp: RegExp;
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constructor(replaceString: string, searchPatternInfo: IPatternInfo);
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constructor(replaceString: string, parseParameters: boolean, regEx: RegExp);
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constructor(replaceString: string, arg2: any, arg3?: any) {
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this._replacePattern = replaceString;
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let searchPatternInfo: IPatternInfo;
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let parseParameters: boolean;
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if (typeof arg2 === 'boolean') {
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this._regExp = arg3;
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parseParameters = !!searchPatternInfo.isRegExp;
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this._regExp = strings.createRegExp(searchPatternInfo.pattern, !!searchPatternInfo.isRegExp, { matchCase: searchPatternInfo.isCaseSensitive, wholeWord: searchPatternInfo.isWordMatch, multiline: searchPatternInfo.isMultiline, global: false, unicode: true });
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}
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if (parseParameters) {
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this.parseReplaceString(replaceString);
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}
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if (this._regExp.global) {
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this._regExp = strings.createRegExp(this._regExp.source, true, { matchCase: !this._regExp.ignoreCase, wholeWord: false, multiline: this._regExp.multiline, global: false });
replace.ts ×2
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}
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this._caseOpsRegExp = new RegExp(/([\s\S]*?)((?:\\[uUlL])+?|)(\$[0-9]+)([\s\S]*?)/g);
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}
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get hasParameters(): boolean {
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}
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get pattern(): string {
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}
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get regExp(): RegExp {
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}
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/**
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* Returns the replace string for the first match in the given text.
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* If text has no matches then returns null.
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*/
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getReplaceString(text: string, preserveCase?: boolean): string | null {
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const match = this._regExp.exec(text);
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if (match) {
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const replaceString = this.replaceWithCaseOperations(text, this._regExp, this.buildReplaceString(match, preserveCase));
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if (match[0] === text) {
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return replaceString;
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}
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return replaceString.substr(match.index, match[0].length - (text.length - replaceString.length));
replace.ts ×2
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}
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return this.buildReplaceString(match, preserveCase);
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}
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return null;
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/**
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* replaceWithCaseOperations applies case operations to relevant replacement strings and applies
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* the affected $N arguments. It then passes unaffected $N arguments through to string.replace().
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*
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* \u => upper-cases one character in a match.
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* \U => upper-cases ALL remaining characters in a match.
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* \l => lower-cases one character in a match.
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* \L => lower-cases ALL remaining characters in a match.
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*/
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private replaceWithCaseOperations(text: string, regex: RegExp, replaceString: string): string {
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if (!/\\[uUlL]/.test(replaceString)) {
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}
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const firstMatch = regex.exec(text);
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if (firstMatch === null) {
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return text.replace(regex, replaceString);
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}
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let patMatch: RegExpExecArray | null;
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let newReplaceString = '';
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let lastIndex = 0;
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let lastMatch = '';
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// For each annotated $N, perform text processing on the parameters and perform the substitution.
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while ((patMatch = this._caseOpsRegExp.exec(replaceString)) !== null) {
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lastIndex = patMatch.index;
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const fullMatch = patMatch[0];
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lastMatch = fullMatch;
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let caseOps = patMatch[2]; // \u, \l\u, etc.
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const money = patMatch[3]; // $1, $2, etc.
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if (!caseOps) {
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newReplaceString += fullMatch;
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continue;
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}
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const replacement = firstMatch[parseInt(money.slice(1))];
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if (!replacement) {
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newReplaceString += fullMatch;
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continue;
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}
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newReplaceString += patMatch[1]; // prefix
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caseOps = caseOps.replace(/\\/g, '');
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let i = 0;
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for (; i < caseOps.length; i++) {
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switch (caseOps[i]) {
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case 'U':
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i = replacementLen;
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break;
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break;
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i = replacementLen;
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break;
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break;
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}
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// Append any remaining replacement string content not covered by case operations.
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if (i < replacementLen) {
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newReplaceString += replacement.slice(i);
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}
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newReplaceString += patMatch[4]; // suffix
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}
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// Append any remaining trailing content after the final regex match.
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newReplaceString += replaceString.slice(lastIndex + lastMatch.length);
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return text.replace(regex, newReplaceString);
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public buildReplaceString(matches: string[] | null, preserveCase?: boolean): string {
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return this._replacePattern;
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}
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}
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/**
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* \n => LF
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* \t => TAB
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* \\ => \
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* $0 => $& (see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#Specifying_a_string_as_a_parameter)
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* everything else stays untouched
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*/
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private parseReplaceString(replaceString: string): void {
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if (!replaceString || replaceString.length === 0) {
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return;
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}
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let substrFrom = 0, result = '';
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for (let i = 0, len = replaceString.length; i < len; i++) {
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const chCode = replaceString.charCodeAt(i);
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if (chCode === CharCode.Backslash) {
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// move to next char
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i++;
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if (i >= len) {
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break;
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}
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const nextChCode = replaceString.charCodeAt(i);
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let replaceWithCharacter: string | null = null;
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switch (nextChCode) {
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case CharCode.Backslash:
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replaceWithCharacter = '\\';
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break;
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replaceWithCharacter = '\n';
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break;
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replaceWithCharacter = '\t';
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break;
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if (replaceWithCharacter) {
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substrFrom = i + 1;
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}
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if (chCode === CharCode.DollarSign) {
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// move to next char
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i++;
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if (i >= len) {
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// string ends with a $
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break;
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}
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const nextChCode = replaceString.charCodeAt(i);
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let replaceWithCharacter: string | null = null;
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switch (nextChCode) {
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case CharCode.Digit0:
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replaceWithCharacter = '$&';
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this._hasParameters = true;
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break;
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case CharCode.SingleQuote:
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break;
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// check if it is a valid string parameter $n (0 <= n <= 99). $0 is already handled by now.
replace.ts ×3
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if (!this.between(nextChCode, CharCode.Digit1, CharCode.Digit9)) {
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}
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break;
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}
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if (!this.between(charCode, CharCode.Digit0, CharCode.Digit9)) {
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this._hasParameters = true;
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--i;
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break;
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}
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this._hasParameters = true;
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break;
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}
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charCode = replaceString.charCodeAt(++i);
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if (!this.between(charCode, CharCode.Digit0, CharCode.Digit9)) {
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this._hasParameters = true;
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--i;
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break;
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}
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break;
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}
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if (replaceWithCharacter) {
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substrFrom = i + 1;
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}
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if (substrFrom === 0) {
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return;
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}
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this._replacePattern = result + replaceString.substring(substrFrom);
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private between(value: number, from: number, to: number): boolean {
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}