refactor(jassub): [PKG-JASSUB-04] migrate owned TypeScript and preserve public types

packages/artplayer-plugin-jassub/src/registration.ts

@@ -0,0 +1,46 @@
+import type { RuntimeOption, RuntimeResult } from '../types/runtime-api.js'
+import JASSUB from './jassub.es.js'
+
+export interface JassubHost {
+  video: HTMLVideoElement
+  on: (name: 'destroy', callback: () => void) => unknown
+  off: (name: 'destroy', callback: () => void) => unknown
+}
+
+export function registerJassub(art: JassubHost, option?: RuntimeOption): RuntimeResult {
+  const instance = new JASSUB({ video: art.video, ...option })
+  let disposed = false
+  const dispose = () => {
+    if (disposed || instance._destroyed)
+      return
+    disposed = true
+    try {
+      instance.destroy()
+    }
+    catch (error) {
+      disposed = false
+      throw error
+    }
+  }
+
+  try {
+    if (instance._canvasParent)
+      instance._canvasParent.style.zIndex = 20
+    art.on('destroy', dispose)
+  }
+  catch (error) {
+    // Registration may throw after attaching its listener. Keep the original
+    // error while independently attempting listener and instance rollback.
+    try {
+      art.off('destroy', dispose)
+    }
+    catch {}
+    try {
+      dispose()
+    }
+    catch {}
+    throw error
+  }
+
+  return { name: 'artplayerPluginJassub', instance }
+}