Overlay 2.0 (#12)

src/renderer/yomitan-popup.ts

@@ -0,0 +1,16 @@
+export const YOMITAN_POPUP_IFRAME_SELECTOR = 'iframe.yomitan-popup, iframe[id^="yomitan-popup"]';
+export const YOMITAN_POPUP_SHOWN_EVENT = 'yomitan-popup-shown';
+export const YOMITAN_POPUP_HIDDEN_EVENT = 'yomitan-popup-hidden';
+
+export function isYomitanPopupIframe(element: Element | null): boolean {
+  if (!element) return false;
+  if (element.tagName.toUpperCase() !== 'IFRAME') return false;
+
+  const hasModernPopupClass = element.classList?.contains('yomitan-popup') ?? false;
+  const hasLegacyPopupId = (element.id ?? '').startsWith('yomitan-popup');
+  return hasModernPopupClass || hasLegacyPopupId;
+}
+
+export function hasYomitanPopupIframe(root: ParentNode = document): boolean {
+  return root.querySelector(YOMITAN_POPUP_IFRAME_SELECTOR) !== null;
+}