Text source element scanning improvements (#1464)

* Add api.textHasJapaneseCharacters

* Add support for empty query

* Add support for showing the query parser for TextSourceElement
with content that does not start with Japanese text

1 files changed, 6 insertions, 1 deletions

diff --git a/ext/js/background/backend.js b/ext/js/background/backend.js
index 484473c7..3d8c4c4a 100644
--- a/ext/js/background/backend.js
+++ b/ext/js/background/backend.js
@@ -127,7 +127,8 @@ class Backend {
             ['getOrCreateSearchPopup',       {async: true,  contentScript: true,  handler: this._onApiGetOrCreateSearchPopup.bind(this)}],
             ['isTabSearchPopup',             {async: true,  contentScript: true,  handler: this._onApiIsTabSearchPopup.bind(this)}],
             ['triggerDatabaseUpdated',       {async: false, contentScript: true,  handler: this._onApiTriggerDatabaseUpdated.bind(this)}],
-            ['testMecab',                    {async: true,  contentScript: true,  handler: this._onApiTestMecab.bind(this)}]
+            ['testMecab',                    {async: true,  contentScript: true,  handler: this._onApiTestMecab.bind(this)}],
+            ['textHasJapaneseCharacters',    {async: false, contentScript: true,  handler: this._onApiTextHasJapaneseCharacters.bind(this)}]
         ]);
         this._messageHandlersWithProgress = new Map([
         ]);
@@ -727,6 +728,10 @@ class Backend {
         return true;
     }
 
+    _onApiTextHasJapaneseCharacters({text}) {
+        return this._japaneseUtil.isStringPartiallyJapanese(text);
+    }
+
     // Command handlers
 
     async _onCommandOpenSearchPage(params) {