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diff --git a/ext/bg/js/settings2/nested-popups-controller.js b/ext/bg/js/settings2/nested-popups-controller.js
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+/*
+ * Copyright (C) 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
+ * DOMDataBinder
+ */
+
+class NestedPopupsController {
+ constructor(settingsController) {
+ this._settingsController = settingsController;
+ this._popupNestingMaxDepth = 0;
+ }
+
+ async prepare() {
+ this._nestedPopupsEnabled = document.querySelector('#nested-popups-enabled');
+ this._nestedPopupsCount = document.querySelector('#nested-popups-count');
+ this._nestedPopupsEnabledMoreOptions = document.querySelector('#nested-popups-enabled-more-options');
+
+ const options = await this._settingsController.getOptions();
+
+ this._nestedPopupsEnabled.addEventListener('change', this._onNestedPopupsEnabledChange.bind(this), false);
+ this._nestedPopupsCount.addEventListener('change', this._onNestedPopupsCountChange.bind(this), false);
+ this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+ this._onOptionsChanged({options});
+ }
+
+ // Private
+
+ _onOptionsChanged({options}) {
+ this._updatePopupNestingMaxDepth(options.scanning.popupNestingMaxDepth);
+ }
+
+ _onNestedPopupsEnabledChange(e) {
+ const value = e.currentTarget.checked;
+ if (value && this._popupNestingMaxDepth > 0) { return; }
+ this._setPopupNestingMaxDepth(value ? 1 : 0);
+ }
+
+ _onNestedPopupsCountChange(e) {
+ const node = e.currentTarget;
+ const value = Math.max(1, DOMDataBinder.convertToNumber(node.value, node));
+ this._setPopupNestingMaxDepth(value);
+ }
+
+ _updatePopupNestingMaxDepth(value) {
+ const enabled = (value > 0);
+ this._popupNestingMaxDepth = value;
+ this._nestedPopupsEnabled.checked = enabled;
+ this._nestedPopupsCount.value = `${value}`;
+ this._nestedPopupsEnabledMoreOptions.hidden = !enabled;
+ }
+
+ async _setPopupNestingMaxDepth(value) {
+ this._updatePopupNestingMaxDepth(value);
+ await this._settingsController.setProfileSetting('scanning.popupNestingMaxDepth', value);
+ }
+}