Function lineAndColumnOf

test/unit/printer/utils.ts:5–25

(text: string, pattern: string)

import { Position } from "source-map";

export function lineAndColumnOf(text: string, pattern: string): Position {
    const pos = text.indexOf(pattern);
    if (pos === -1) {
        return { line: -1, column: -1 };
    }

    const lineLengths = text.split("\n").map(s => s.length);

    let totalPos = 0;
    for (let line = 1; line <= lineLengths.length; line++) {
        // Add + 1 for the removed \n
        const lineLength = lineLengths[line - 1] + 1;
        if (pos < totalPos + lineLength) {
            return { line, column: pos - totalPos };
        }

        totalPos += lineLengths[line - 1] + 1;
    }

    return { line: -1, column: -1 };
}