Vlad Durnea
cffdf8af86
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31 lines
664 B
JavaScript
31 lines
664 B
JavaScript
import { invariant } from '../jsutils/invariant.mjs';
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const LineRegExp = /\r\n|[\n\r]/g;
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/**
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* Represents a location in a Source.
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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, position) {
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let lastLineStart = 0;
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let line = 1;
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for (const match of source.body.matchAll(LineRegExp)) {
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typeof match.index === 'number' || invariant(false);
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if (match.index >= position) {
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break;
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}
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lastLineStart = match.index + match[0].length;
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line += 1;
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}
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return {
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line,
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column: position + 1 - lastLineStart,
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};
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}
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