"isJapanese" check move (#730)

* Move isStringPartiallyJapanese out of ClipboardMonitor

* Create isStringPartiallyJapanese function

* Add textMayBeTranslatable

* Rename API function

* Rename internal function

* Add helper

* Update translatable check

* Pass language to TextScanner

* Pass language explicitly

* Use textMayBeTranslatable

* No redundant translatable check

* Update eslint

* Remove double newline

* Collapse

* Rename

1 files changed, 11 insertions, 7 deletions

diff --git a/ext/js/background/backend.js b/ext/js/background/backend.js
index 79023ac9..6340d021 100644
--- a/ext/js/background/backend.js
+++ b/ext/js/background/backend.js
@@ -34,8 +34,8 @@ import {arrayBufferToBase64} from '../data/sandbox/array-buffer-util.js';
 import {DictionaryDatabase} from '../dictionary/dictionary-database.js';
 import {Environment} from '../extension/environment.js';
 import {ObjectPropertyAccessor} from '../general/object-property-accessor.js';
-import {distributeFuriganaInflected, isCodePointJapanese, isStringPartiallyJapanese, convertKatakanaToHiragana as jpConvertKatakanaToHiragana} from '../language/ja/japanese.js';
-import {getLanguageSummaries} from '../language/languages.js';
+import {distributeFuriganaInflected, isCodePointJapanese, convertKatakanaToHiragana as jpConvertKatakanaToHiragana} from '../language/ja/japanese.js';
+import {getLanguageSummaries, isTextLookupWorthy} from '../language/languages.js';
 import {Translator} from '../language/translator.js';
 import {AudioDownloader} from '../media/audio-downloader.js';
 import {getFileExtensionFromAudioMediaType, getFileExtensionFromImageMediaType} from '../media/media-util.js';
@@ -175,7 +175,7 @@ export class Backend {
             ['isTabSearchPopup',             this._onApiIsTabSearchPopup.bind(this)],
             ['triggerDatabaseUpdated',       this._onApiTriggerDatabaseUpdated.bind(this)],
             ['testMecab',                    this._onApiTestMecab.bind(this)],
-            ['textHasJapaneseCharacters',    this._onApiTextHasJapaneseCharacters.bind(this)],
+            ['isTextLookupWorthy',           this._onApiIsTextLookupWorthy.bind(this)],
             ['getTermFrequencies',           this._onApiGetTermFrequencies.bind(this)],
             ['findAnkiNotes',                this._onApiFindAnkiNotes.bind(this)],
             ['openCrossFramePort',           this._onApiOpenCrossFramePort.bind(this)],
@@ -310,7 +310,11 @@ export class Backend {
      * @param {import('clipboard-monitor').EventArgument<'change'>} details
      */
     async _onClipboardTextChange({text}) {
-        const {clipboard: {maximumSearchLength}} = this._getProfileOptions({current: true}, false);
+        const {
+            general: {language},
+            clipboard: {maximumSearchLength}
+        } = this._getProfileOptions({current: true}, false);
+        if (!isTextLookupWorthy(text, language)) { return; }
         if (text.length > maximumSearchLength) {
             text = text.substring(0, maximumSearchLength);
         }
@@ -839,9 +843,9 @@ export class Backend {
         return true;
     }
 
-    /** @type {import('api').ApiHandler<'textHasJapaneseCharacters'>} */
-    _onApiTextHasJapaneseCharacters({text}) {
-        return isStringPartiallyJapanese(text);
+    /** @type {import('api').ApiHandler<'isTextLookupWorthy'>} */
+    _onApiIsTextLookupWorthy({text, language}) {
+        return isTextLookupWorthy(text, language);
     }
 
     /** @type {import('api').ApiHandler<'getTermFrequencies'>} */