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diff --git a/ext/bg/js/search-query-parser.js b/ext/bg/js/search-query-parser.js
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+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+class QueryParser {
+ constructor(search) {
+ this.search = search;
+
+ this.queryParser = document.querySelector('#query-parser');
+
+ // TODO also enable for mouseover scanning
+ this.queryParser.addEventListener('click', (e) => this.onTermLookup(e));
+ }
+
+ onError(error) {
+ logError(error, false);
+ }
+
+ async onTermLookup(e) {
+ const {textSource} = await this.search.onTermLookup(e, {isQueryParser: true});
+ if (textSource) {
+ textSource.select();
+ }
+ }
+
+ setText(text) {
+ this.queryParser.innerText = text;
+ }
+}