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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,169 @@ | ||
| /*--------------------------------------------------------------------------------------------- | ||
| * Copyright (c) Microsoft Corporation. All rights reserved. | ||
| * Licensed under the MIT License. See License.txt in the project root for license information. | ||
| *--------------------------------------------------------------------------------------------*/ | ||
| 'use strict'; | ||
|
|
||
| import * as strings from 'vs/base/common/strings'; | ||
| import {IPatternInfo} from 'vs/platform/search/common/search'; | ||
|
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| const BACKSLASH_CHAR_CODE = '\\'.charCodeAt(0); | ||
| const DOLLAR_CHAR_CODE = '$'.charCodeAt(0); | ||
| const ZERO_CHAR_CODE = '0'.charCodeAt(0); | ||
| const ONE_CHAR_CODE = '1'.charCodeAt(0); | ||
| const NINE_CHAR_CODE = '9'.charCodeAt(0); | ||
| const BACK_TICK_CHAR_CODE = '`'.charCodeAt(0); | ||
| const SINGLE_QUOTE_CHAR_CODE = '`'.charCodeAt(0); | ||
| const n_CHAR_CODE = 'n'.charCodeAt(0); | ||
| const t_CHAR_CODE = 't'.charCodeAt(0); | ||
|
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| export class ReplacePattern { | ||
|
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| private _replacePattern: string; | ||
| private _searchRegExp: RegExp; | ||
| private _hasParameters: boolean= false; | ||
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| constructor(private replaceString: string, private searchPatternInfo: IPatternInfo) { | ||
| this._replacePattern= replaceString; | ||
| if (searchPatternInfo.isRegExp) { | ||
| this._searchRegExp= strings.createRegExp(searchPatternInfo.pattern, searchPatternInfo.isRegExp, searchPatternInfo.isCaseSensitive, searchPatternInfo.isWordMatch, true); | ||
| this.parseReplaceString(replaceString); | ||
| } | ||
| } | ||
|
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| public get hasParameters(): boolean { | ||
| return this._hasParameters; | ||
| } | ||
|
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| public get pattern(): string { | ||
| return this._replacePattern; | ||
| } | ||
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| public getReplaceString(matchedString: string): string { | ||
| if (this.hasParameters) { | ||
| return matchedString.replace(this._searchRegExp, this.pattern); | ||
| } | ||
| return this.pattern; | ||
| } | ||
|
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||
| /** | ||
| * \n => LF | ||
| * \t => TAB | ||
| * \\ => \ | ||
| * $0 => $& (see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#Specifying_a_string_as_a_parameter) | ||
| * everything else stays untouched | ||
| */ | ||
| private parseReplaceString(replaceString: string): void { | ||
| if (!replaceString || replaceString.length === 0) { | ||
| return; | ||
| } | ||
|
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||
| let substrFrom = 0, result = ''; | ||
| for (let i = 0, len = replaceString.length; i < len; i++) { | ||
| let chCode = replaceString.charCodeAt(i); | ||
|
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| if (chCode === BACKSLASH_CHAR_CODE) { | ||
|
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| // move to next char | ||
| i++; | ||
|
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| if (i >= len) { | ||
| // string ends with a \ | ||
| break; | ||
| } | ||
|
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| let nextChCode = replaceString.charCodeAt(i); | ||
| let replaceWithCharacter: string = null; | ||
|
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| switch (nextChCode) { | ||
| case BACKSLASH_CHAR_CODE: | ||
| // \\ => \ | ||
| replaceWithCharacter = '\\'; | ||
| break; | ||
| case n_CHAR_CODE: | ||
| // \n => LF | ||
| replaceWithCharacter = '\n'; | ||
| break; | ||
| case t_CHAR_CODE: | ||
| // \t => TAB | ||
| replaceWithCharacter = '\t'; | ||
| break; | ||
| } | ||
|
|
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| if (replaceWithCharacter) { | ||
| result += replaceString.substring(substrFrom, i - 1) + replaceWithCharacter; | ||
| substrFrom = i + 1; | ||
| } | ||
| } | ||
|
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| if (chCode === DOLLAR_CHAR_CODE) { | ||
|
|
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| // move to next char | ||
| i++; | ||
|
|
||
| if (i >= len) { | ||
| // string ends with a $ | ||
| break; | ||
| } | ||
|
|
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| let nextChCode = replaceString.charCodeAt(i); | ||
| let replaceWithCharacter: string = null; | ||
|
|
||
| switch (nextChCode) { | ||
| case ZERO_CHAR_CODE: | ||
| // $0 => $& | ||
| replaceWithCharacter = '$&'; | ||
| this._hasParameters = true; | ||
| break; | ||
| case BACK_TICK_CHAR_CODE: | ||
| case SINGLE_QUOTE_CHAR_CODE: | ||
| this._hasParameters = true; | ||
| break; | ||
| default: | ||
| // check if it is a valid string parameter $n (0 <= n <= 99). $0 is already handled by now. | ||
| if (!this.between(nextChCode, ONE_CHAR_CODE, NINE_CHAR_CODE)) { | ||
| break; | ||
| } | ||
| if (i === replaceString.length - 1) { | ||
| this._hasParameters = true; | ||
| break; | ||
| } | ||
| let charCode= replaceString.charCodeAt(++i); | ||
| if (!this.between(charCode, ZERO_CHAR_CODE, NINE_CHAR_CODE)) { | ||
| this._hasParameters = true; | ||
| --i; | ||
| break; | ||
| } | ||
| if (i === replaceString.length - 1) { | ||
| this._hasParameters = true; | ||
| break; | ||
| } | ||
| charCode= replaceString.charCodeAt(++i); | ||
| if (!this.between(charCode, ZERO_CHAR_CODE, NINE_CHAR_CODE)) { | ||
| this._hasParameters = true; | ||
| --i; | ||
| break; | ||
| } | ||
| break; | ||
| } | ||
|
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| if (replaceWithCharacter) { | ||
| result += replaceString.substring(substrFrom, i - 1) + replaceWithCharacter; | ||
| substrFrom = i + 1; | ||
| } | ||
| } | ||
| } | ||
|
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| if (substrFrom === 0) { | ||
| // no replacement occured | ||
| return; | ||
| } | ||
|
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| this._replacePattern= result + replaceString.substring(substrFrom); | ||
| } | ||
|
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| private between(value: number, from: number, to: number): boolean { | ||
| return from <= value && value <= to; | ||
| } | ||
| } | ||
|
|
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