refactor(command-palette): wire openFile through PaletteOpsContext

src/contexts/PaletteOpsContext.tsx

@@ -0,0 +1,70 @@
+import { createContext, useCallback, useContext, useEffect, useMemo, useRef } from 'react';
+import type { ReactNode } from 'react';
+
+export type PaletteOps = {
+  openFile: (path: string) => void;
+  openSettings: (tab?: string) => void;
+  refreshProjects: () => Promise<void> | void;
+};
+
+type Handle = {
+  handlersRef: React.MutableRefObject<Partial<PaletteOps>>;
+  call: PaletteOps;
+};
+
+const PaletteOpsContext = createContext<Handle | null>(null);
+
+const noop = () => undefined;
+
+export function PaletteOpsProvider({ children }: { children: ReactNode }) {
+  const handlersRef = useRef<Partial<PaletteOps>>({});
+
+  const call = useMemo<PaletteOps>(
+    () => ({
+      openFile: (path) => handlersRef.current.openFile?.(path),
+      openSettings: (tab) => handlersRef.current.openSettings?.(tab),
+      refreshProjects: () => handlersRef.current.refreshProjects?.() ?? undefined,
+    }),
+    [],
+  );
+
+  const value = useMemo<Handle>(() => ({ handlersRef, call }), [call]);
+
+  return <PaletteOpsContext.Provider value={value}>{children}</PaletteOpsContext.Provider>;
+}
+
+export function usePaletteOps(): PaletteOps {
+  const handle = useContext(PaletteOpsContext);
+  if (!handle) {
+    return { openFile: noop, openSettings: noop, refreshProjects: noop };
+  }
+  return handle.call;
+}
+
+export function usePaletteOpsRegister(partial: Partial<PaletteOps>) {
+  const handle = useContext(PaletteOpsContext);
+  const openFile = partial.openFile;
+  const openSettings = partial.openSettings;
+  const refreshProjects = partial.refreshProjects;
+
+  const installer = useCallback(() => {
+    if (!handle) return undefined;
+    const prev = { ...handle.handlersRef.current };
+    if (openFile) handle.handlersRef.current.openFile = openFile;
+    if (openSettings) handle.handlersRef.current.openSettings = openSettings;
+    if (refreshProjects) handle.handlersRef.current.refreshProjects = refreshProjects;
+    return () => {
+      if (openFile && handle.handlersRef.current.openFile === openFile) {
+        handle.handlersRef.current.openFile = prev.openFile;
+      }
+      if (openSettings && handle.handlersRef.current.openSettings === openSettings) {
+        handle.handlersRef.current.openSettings = prev.openSettings;
+      }
+      if (refreshProjects && handle.handlersRef.current.refreshProjects === refreshProjects) {
+        handle.handlersRef.current.refreshProjects = prev.refreshProjects;
+      }
+    };
+  }, [handle, openFile, openSettings, refreshProjects]);
+
+  useEffect(() => installer(), [installer]);
+}