64 lines
1.9 KiB
JavaScript
64 lines
1.9 KiB
JavaScript
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/**
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* @typedef {import('unist').Position} Position
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*
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* @typedef {[number, number]} RangeLike
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*
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* @typedef PointLike
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* @property {number | null | undefined} [line]
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* @property {number | null | undefined} [column]
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*
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* @typedef LocLike
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* @property {PointLike | null | undefined} [start]
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* @property {PointLike | null | undefined} [end]
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*
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* @typedef NodeLike
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* @property {LocLike | null | undefined} [loc]
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* @property {RangeLike | null | undefined} [range]
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* @property {number | null | undefined} [start]
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* @property {number | null | undefined} [end]
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*/
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/**
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* Turn an estree `node` into a unist `position`.
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*
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* @param {NodeLike | null | undefined} [node]
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* estree node.
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* @returns {Position}
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* unist position.
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*/
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export function positionFromEstree(node) {
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const nodeLike = node || {}
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const loc = nodeLike.loc || {}
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const range = nodeLike.range || [0, 0]
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const startColumn = loc.start
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? numberOrUndefined(loc.start.column)
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: undefined
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const endColumn = loc.end ? numberOrUndefined(loc.end.column) : undefined
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return {
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start: {
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// @ts-expect-error: return no point / no position next major.
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line: loc.start ? numberOrUndefined(loc.start.line) : undefined,
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// @ts-expect-error: return no point / no position next major.
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column: startColumn === undefined ? undefined : startColumn + 1,
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offset: numberOrUndefined(range[0] || nodeLike.start)
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},
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end: {
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// @ts-expect-error: return no point / no position next major.
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line: loc.end ? numberOrUndefined(loc.end.line) : undefined,
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// @ts-expect-error: return no point / no position next major.
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column: endColumn === undefined ? undefined : endColumn + 1,
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offset: numberOrUndefined(range[1] || nodeLike.end)
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}
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}
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}
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/**
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*
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* @param {number | null | undefined} value
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* @returns {number | undefined}
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*/
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function numberOrUndefined(value) {
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return typeof value === 'number' && value > -1 ? value : undefined
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}
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