azuredatastudio/src/vs/platform/userDataSync/common/content.ts

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the Source EULA. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import { JSONPath } from 'vs/base/common/json';
import { setProperty } from 'vs/base/common/jsonEdit';
import { FormattingOptions } from 'vs/base/common/jsonFormatter';


export function edit(content: string, originalPath: JSONPath, value: any, formattingOptions: FormattingOptions): string {
	const edit = setProperty(content, originalPath, value, formattingOptions)[0];
	if (edit) {
		content = content.substring(0, edit.offset) + edit.content + content.substring(edit.offset + edit.length);
	}
	return content;
}

export function getLineStartOffset(content: string, eol: string, atOffset: number): number {
	let lineStartingOffset = atOffset;
	while (lineStartingOffset >= 0) {
		if (content.charAt(lineStartingOffset) === eol.charAt(eol.length - 1)) {
			if (eol.length === 1) {
				return lineStartingOffset + 1;
			}
		}
		lineStartingOffset--;
		if (eol.length === 2) {
			if (lineStartingOffset >= 0 && content.charAt(lineStartingOffset) === eol.charAt(0)) {
				return lineStartingOffset + 2;
			}
		}
	}
	return 0;
}

export function getLineEndOffset(content: string, eol: string, atOffset: number): number {
	let lineEndOffset = atOffset;
	while (lineEndOffset >= 0) {
		if (content.charAt(lineEndOffset) === eol.charAt(eol.length - 1)) {
			if (eol.length === 1) {
				return lineEndOffset;
			}
		}
		lineEndOffset++;
		if (eol.length === 2) {
			if (lineEndOffset >= 0 && content.charAt(lineEndOffset) === eol.charAt(1)) {
				return lineEndOffset;
			}
		}
	}
	return content.length - 1;
}