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39 lines
971 B
39 lines
971 B
import { SyncDoc, Path } from '../model'
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import { NodeJSON } from 'slate'
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export const isTree = (node: NodeJSON): any => node.object !== 'text'
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export const getTarget = (doc: SyncDoc, path: Path) => {
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const iterate = (current: any, idx: number) => {
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if (!isTree(current) || !current.nodes) {
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throw new TypeError(
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`path ${path.toString()} does not match tree ${JSON.stringify(current)}`
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)
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}
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return current.nodes[idx]
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}
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return path.reduce(iterate, doc.document)
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}
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export const getParentPath = (
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path: Path,
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level: number = 1
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): [number, Path] => {
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if (level > path.size) {
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throw new TypeError('requested ancestor is higher than root')
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}
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return [path.get(path.size - level), path.slice(0, path.size - level) as Path]
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}
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export const getParent = (
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doc: SyncDoc,
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path: Path,
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level = 1
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): [NodeJSON, number] => {
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const [idx, parentPath] = getParentPath(path, level)
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return [getTarget(doc, parentPath), idx]
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}
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