refactor(core): CORE-14 split typed settings and scope tree lifetimes

packages/artplayer/src/setting/registration.ts

@@ -0,0 +1,20 @@
+import type { SettingItem } from './types'
+
+const registrations = new WeakMap<SettingItem, object>()
+
+export function cancelSettingAdd(item: SettingItem): void {
+  registrations.delete(item)
+}
+
+export function beginSettingAdd(item: SettingItem): { current: () => boolean, finish: () => void } {
+  const token = {}
+  registrations.set(item, token)
+  const current = () => registrations.get(item) === token
+  return {
+    current,
+    finish() {
+      if (current())
+        registrations.delete(item)
+    },
+  }
+}