From 29c38b06b2fd700e7dbf49013ad91d473e65e812 Mon Sep 17 00:00:00 2001
From: siikamiika <siikamiika@users.noreply.github.com>
Date: Wed, 13 Nov 2019 13:51:47 +0200
Subject: only paste Japanese text from clipboard

---
 ext/bg/js/search.js      | 2 +-
 ext/mixed/js/japanese.js | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/ext/bg/js/search.js b/ext/bg/js/search.js
index ad579918..6f512604 100644
--- a/ext/bg/js/search.js
+++ b/ext/bg/js/search.js
@@ -248,7 +248,7 @@ class DisplaySearch extends Display {
             } else if (IS_FIREFOX === false) {
                 curText = (await apiClipboardGet()).trim();
             }
-            if (curText && (curText !== this.clipboardPrevText)) {
+            if (curText && (curText !== this.clipboardPrevText) && jpIsJapaneseText(curText)) {
                 if (this.isWanakanaEnabled()) {
                     this.query.value = window.wanakana.toKana(curText);
                 } else {
diff --git a/ext/mixed/js/japanese.js b/ext/mixed/js/japanese.js
index 9f401da7..d24f56a6 100644
--- a/ext/mixed/js/japanese.js
+++ b/ext/mixed/js/japanese.js
@@ -26,6 +26,15 @@ function jpIsKana(c) {
     return wanakana.isKana(c);
 }
 
+function jpIsJapaneseText(text) {
+    for (const c of text) {
+        if (jpIsKanji(c) || jpIsKana(c)) {
+            return true;
+        }
+    }
+    return false;
+}
+
 function jpKatakanaToHiragana(text) {
     let result = '';
     for (const c of text) {
-- 
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