var __rest = (this && this.__rest) || function (s, e) {
    var t = {};
    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
        t[p] = s[p];
    if (s != null && typeof Object.getOwnPropertySymbols === "function")
        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
                t[p[i]] = s[p[i]];
        }
    return t;
};
import { rewireSource } from '../util.js';
const pull = (offset) => (str) => str.slice(offset);
const push = (offset) => {
    const space = ''.padStart(offset, ' ');
    return (str) => str + space;
};
export default function indent(pos) {
    let shift;
    const pad = (start) => {
        if (shift === undefined) {
            const offset = pos - start.length;
            shift = offset > 0 ? push(offset) : pull(-offset);
        }
        return shift(start);
    };
    const update = (line) => (Object.assign(Object.assign({}, line), { tokens: Object.assign(Object.assign({}, line.tokens), { start: pad(line.tokens.start) }) }));
    return (_a) => {
        var { source } = _a, fields = __rest(_a, ["source"]);
        return rewireSource(Object.assign(Object.assign({}, fields), { source: source.map(update) }));
    };
}