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diff --git a/ext/fg/js/content-script-main.js b/ext/fg/js/content-script-main.js
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+/*
+ * Copyright (C) 2019-2020 Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* global
+ * DOM
+ * FrameOffsetForwarder
+ * Frontend
+ * PopupProxy
+ * PopupProxyHost
+ * apiBroadcastTab
+ * apiOptionsGet
+ */
+
+async function createIframePopupProxy(url, frameOffsetForwarder, setDisabled) {
+ const rootPopupInformationPromise = yomichan.getTemporaryListenerResult(
+ chrome.runtime.onMessage,
+ ({action, params}, {resolve}) => {
+ if (action === 'rootPopupInformation') {
+ resolve(params);
+ }
+ }
+ );
+ apiBroadcastTab('rootPopupRequestInformationBroadcast');
+ const {popupId, frameId} = await rootPopupInformationPromise;
+
+ const getFrameOffset = frameOffsetForwarder.getOffset.bind(frameOffsetForwarder);
+
+ const popup = new PopupProxy(popupId, 0, null, frameId, url, getFrameOffset, setDisabled);
+ await popup.prepare();
+
+ return popup;
+}
+
+async function getOrCreatePopup(depth) {
+ const popupHost = new PopupProxyHost();
+ await popupHost.prepare();
+
+ const popup = popupHost.getOrCreatePopup(null, null, depth);
+
+ return popup;
+}
+
+async function createPopupProxy(depth, id, parentFrameId, url) {
+ const popup = new PopupProxy(null, depth + 1, id, parentFrameId, url);
+ await popup.prepare();
+
+ return popup;
+}
+
+async function contentScriptMain() {
+ await yomichan.prepare();
+
+ const data = window.frontendInitializationData || {};
+ const {id, depth=0, parentFrameId, url=window.location.href, proxy=false, isSearchPage=false} = data;
+
+ const isIframe = !proxy && (window !== window.parent);
+
+ const popups = {
+ iframe: null,
+ proxy: null,
+ normal: null
+ };
+
+ let frontend = null;
+ let frontendPreparePromise = null;
+ let frameOffsetForwarder = null;
+
+ let iframePopupsInRootFrameAvailable = true;
+
+ const disableIframePopupsInRootFrame = () => {
+ iframePopupsInRootFrameAvailable = false;
+ applyOptions();
+ };
+
+ const applyOptions = async () => {
+ const optionsContext = {depth: isSearchPage ? 0 : depth, url};
+ const options = await apiOptionsGet(optionsContext);
+
+ if (!proxy && frameOffsetForwarder === null) {
+ frameOffsetForwarder = new FrameOffsetForwarder();
+ frameOffsetForwarder.start();
+ }
+
+ let popup;
+ if (isIframe && options.general.showIframePopupsInRootFrame && DOM.getFullscreenElement() === null && iframePopupsInRootFrameAvailable) {
+ popup = popups.iframe || await createIframePopupProxy(url, frameOffsetForwarder, disableIframePopupsInRootFrame);
+ popups.iframe = popup;
+ } else if (proxy) {
+ popup = popups.proxy || await createPopupProxy(depth, id, parentFrameId, url);
+ popups.proxy = popup;
+ } else {
+ popup = popups.normal || await getOrCreatePopup(depth);
+ popups.normal = popup;
+ }
+
+ if (frontend === null) {
+ frontend = new Frontend(popup);
+ frontendPreparePromise = frontend.prepare();
+ await frontendPreparePromise;
+ } else {
+ await frontendPreparePromise;
+ if (isSearchPage) {
+ const disabled = !options.scanning.enableOnSearchPage;
+ frontend.setDisabledOverride(disabled);
+ }
+
+ if (isIframe) {
+ await frontend.setPopup(popup);
+ }
+ }
+ };
+
+ yomichan.on('optionsUpdated', applyOptions);
+ window.addEventListener('fullscreenchange', applyOptions, false);
+
+ await applyOptions();
+}
+
+contentScriptMain();