35 lines
850 B
Plaintext
35 lines
850 B
Plaintext
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict
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*/
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import type { Source } from './source';
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/**
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* Represents a location in a Source.
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*/
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export type SourceLocation = {|
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+line: number,
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+column: number,
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|};
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/**
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* Takes a Source and a UTF-8 character offset, and returns the corresponding
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* line and column as a SourceLocation.
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*/
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export function getLocation(source: Source, position: number): SourceLocation {
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const lineRegexp = /\r\n|[\n\r]/g;
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let line = 1;
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let column = position + 1;
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let match;
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while ((match = lineRegexp.exec(source.body)) && match.index < position) {
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line += 1;
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column = position + 1 - (match.index + match[0].length);
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}
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return { line, column };
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}
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