| 1 | import type { CodeViewScrollTarget } from "@pierre/diffs"; |
| 2 | import { useCallback, useEffect, useRef, useState } from "react"; |
| 3 | |
| 4 | interface FileRevealHandle { |
| 5 | getInstance(): object | undefined; |
| 6 | scrollTo(target: CodeViewScrollTarget): void; |
| 7 | } |
| 8 | |
| 9 | // Wait for a mounted viewer and expanded rows, then apply each tree click once. |
| 10 | // Keep scope stable until the diff or external file selection changes. |
| 11 | export function useCodeViewFileReveal<TScope>( |
| 12 | viewer: FileRevealHandle | null, |
| 13 | scope: TScope, |
| 14 | readyFileKeys?: ReadonlyArray<string>, |
| 15 | ) { |
| 16 | const [request, setRequest] = useState<{ fileKey: string; scope: TScope } | null>(null); |
| 17 | const handledRequest = useRef<typeof request>(null); |
| 18 | |
| 19 | useEffect(() => { |
| 20 | if (request === null || handledRequest.current === request) return; |
| 21 | if (request.scope !== scope) { |
| 22 | handledRequest.current = request; |
| 23 | return; |
| 24 | } |
| 25 | if (!viewer?.getInstance() || (readyFileKeys && !readyFileKeys.includes(request.fileKey))) |
| 26 | return; |
| 27 | |
| 28 | viewer.scrollTo({ type: "item", id: request.fileKey, align: "start" }); |
| 29 | handledRequest.current = request; |
| 30 | }, [request, scope, viewer, readyFileKeys]); |
| 31 | |
| 32 | return useCallback((fileKey: string) => setRequest({ fileKey, scope }), [scope]); |
| 33 | } |