refactor(core): CORE-17 type input events and own interaction lifetimes

packages/artplayer/src/events/viewport.ts

@@ -0,0 +1,11 @@
+export function inViewport(element: HTMLElement, offset: number): boolean {
+  const rect = element.getBoundingClientRect()
+  const document = element.ownerDocument
+  const window = document.defaultView
+  const height = window?.innerHeight || document.documentElement.clientHeight
+  const width = window?.innerWidth || document.documentElement.clientWidth
+  // Retain the historical edge/gap calculations while using the actual owner viewport.
+  const vertical = rect.top - offset <= height && rect.top + rect.height + offset >= 0
+  const horizontal = rect.left - offset <= width + offset && rect.left + rect.width + offset >= 0
+  return vertical && horizontal
+}