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43 lines
1.0 KiB
43 lines
1.0 KiB
import { Node, Path } from 'slate'
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import { SyncDoc } from '../model'
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export const isTree = (node: Node): boolean => Boolean(node?.children)
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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[idx])) {
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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[idx] || current?.children[idx]
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}
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return path.reduce(iterate, doc)
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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.length) {
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throw new TypeError('requested ancestor is higher than root')
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}
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return [path[path.length - level], path.slice(0, path.length - level)]
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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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): [any, 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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export const getChildren = (node: Node) => node.children || node
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