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vendor/yomitan/js/display/search-persistent-state-controller.js

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+/*
+ * Copyright (C) 2023-2025  Yomitan Authors
+ * Copyright (C) 2021-2022  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/>.
+ */
+
+import {EventDispatcher} from '../core/event-dispatcher.js';
+
+/**
+ * @augments EventDispatcher<import('search-persistent-state-controller').Events>
+ */
+export class SearchPersistentStateController extends EventDispatcher {
+    constructor() {
+        super();
+        /** @type {import('display').SearchMode} */
+        this._mode = null;
+    }
+
+    /** @type {import('display').SearchMode} */
+    get mode() {
+        return this._mode;
+    }
+
+    set mode(value) {
+        this._setMode(value, true);
+    }
+
+    /** */
+    prepare() {
+        this._updateMode();
+    }
+
+    // Private
+
+    /** */
+    _updateMode() {
+        let mode = null;
+        try {
+            mode = sessionStorage.getItem('mode');
+        } catch (e) {
+            // Browsers can throw a SecurityError when cookie blocking is enabled.
+        }
+        this._setMode(this._normalizeMode(mode), false);
+    }
+
+    /**
+     * @param {import('display').SearchMode} mode
+     * @param {boolean} save
+     */
+    _setMode(mode, save) {
+        if (mode === this._mode) { return; }
+        if (save) {
+            try {
+                if (mode === null) {
+                    sessionStorage.removeItem('mode');
+                } else {
+                    sessionStorage.setItem('mode', mode);
+                }
+            } catch (e) {
+                // Browsers can throw a SecurityError when cookie blocking is enabled.
+            }
+        }
+        this._mode = mode;
+        document.documentElement.dataset.searchMode = (mode !== null ? mode : '');
+        this.trigger('modeChange', {mode});
+    }
+
+    /**
+     * @param {?string} mode
+     * @returns {import('display').SearchMode}
+     */
+    _normalizeMode(mode) {
+        switch (mode) {
+            case 'popup':
+            case 'action-popup':
+                return mode;
+            default:
+                return null;
+        }
+    }
+}