add mecab support

1 files changed, 63 insertions, 0 deletions

diff --git a/ext/bg/js/mecab.js b/ext/bg/js/mecab.js
new file mode 100644
index 00000000..dc46ded2
--- /dev/null
+++ b/ext/bg/js/mecab.js
@@ -0,0 +1,63 @@
+/*
+ * 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 Mecab {
+    constructor() {
+        this.listeners = {};
+        this.sequence = 0;
+        this.startListener();
+    }
+
+    async parseText(text) {
+        return await this.invoke('parse_text', {text});
+    }
+
+    startListener() {
+        this.port = chrome.runtime.connectNative('mecab');
+        this.port.onMessage.addListener((message) => {
+            const {sequence, data} = message;
+            const {callback, timer} = this.listeners[sequence] || {};
+            if (timer) {
+                clearTimeout(timer);
+                delete this.listeners[sequence];
+                callback(data);
+            }
+        });
+    }
+
+    invoke(action, params) {
+        return new Promise((resolve, reject) => {
+            const sequence = this.sequence++;
+
+            this.listeners[sequence] = {
+                callback: (data) => {
+                    resolve(data);
+                },
+                timer: setTimeout(() => {
+                    delete this.listeners[sequence];
+                    reject(`Mecab invoke timed out in ${Mecab.timeout} ms`);
+                }, 1000)
+            }
+
+            this.port.postMessage({action, params, sequence});
+        });
+    }
+}
+
+Mecab.timeout = 1000;