From 25b0143a12e9c28366ff2b34cba1b0a2d30dcd44 Mon Sep 17 00:00:00 2001
From: Thomas Steiner <tomac@google.com>
Date: Fri, 11 Jul 2025 19:14:25 +0200
Subject: [PATCH] Don't auto-change the language

---
 .../compose/components/compose_form.jsx       | 29 +--------------
 .../compose/util/language_detection.js        |  3 +-
 ...anguage_detection_with_languagedetector.js | 37 +++++++------------
 3 files changed, 17 insertions(+), 52 deletions(-)

diff --git a/app/javascript/mastodon/features/compose/components/compose_form.jsx b/app/javascript/mastodon/features/compose/components/compose_form.jsx
index c8a43787d29..b4b71f8310f 100644
--- a/app/javascript/mastodon/features/compose/components/compose_form.jsx
+++ b/app/javascript/mastodon/features/compose/components/compose_form.jsx
@@ -11,7 +11,6 @@ import ImmutablePureComponent from 'react-immutable-pure-component';
 import { length } from 'stringz';
 
 import { missingAltTextModal } from 'mastodon/initial_state';
-import { changeComposeLanguage } from 'mastodon/actions/compose';
 
 import AutosuggestInput from 'mastodon/components/autosuggest_input';
 import AutosuggestTextarea from 'mastodon/components/autosuggest_textarea';
@@ -46,10 +45,6 @@ const messages = defineMessages({
   reply: { id: 'compose_form.reply', defaultMessage: 'Reply' },
 });
 
-const mapStateToProps = (state) => ({
-  currentLanguage: state.meta.get('locale'),
-});
-
 class ComposeForm extends ImmutablePureComponent {
   static propTypes = {
     intl: PropTypes.object.isRequired,
@@ -106,25 +101,6 @@ class ComposeForm extends ImmutablePureComponent {
     }
   };
 
-  handleKeyUp = async (e) => {
-    const text = this.getFulltextForCharacterCounting().trim();
-    const currentLanguage = this.props.currentLanguage;
-    if (!text || countLetters(text) <= 5) {
-      this.props.dispatch(changeComposeLanguage(currentLanguage));
-      return;
-    }
-    try {
-      let detectedLanguage = await debouncedGuess(text);
-      if (!detectedLanguage) {
-        this.props.dispatch(changeComposeLanguage(currentLanguage));
-        return;
-      }
-      this.props.dispatch(changeComposeLanguage(detectedLanguage));
-    } catch {
-      this.props.dispatch(changeComposeLanguage(currentLanguage));
-    }
-  }
-
   getFulltextForCharacterCounting = () => {
     return [this.props.spoiler? this.props.spoilerText: '', countableText(this.props.text)].join('');
   };
@@ -301,7 +277,6 @@ class ComposeForm extends ImmutablePureComponent {
               suggestions={this.props.suggestions}
               onFocus={this.handleFocus}
               onKeyDown={this.handleKeyDown}
-              onKeyUp={this.handleKeyUp}
               onSuggestionsFetchRequested={this.onSuggestionsFetchRequested}
               onSuggestionsClearRequested={this.onSuggestionsClearRequested}
               onSuggestionSelected={this.onSuggestionSelected}
@@ -338,7 +313,7 @@ class ComposeForm extends ImmutablePureComponent {
                 >
                   {intl.formatMessage(
                     this.props.isEditing ?
-                      messages.saveChanges : 
+                      messages.saveChanges :
                       (this.props.isInReply ? messages.reply : messages.publish)
                   )}
                 </Button>
@@ -352,4 +327,4 @@ class ComposeForm extends ImmutablePureComponent {
 
 }
 
-export default injectIntl(connect(mapStateToProps)(ComposeForm));
+export default injectIntl(ComposeForm);
diff --git a/app/javascript/mastodon/features/compose/util/language_detection.js b/app/javascript/mastodon/features/compose/util/language_detection.js
index 3e25a41ab53..79ca8db19ae 100644
--- a/app/javascript/mastodon/features/compose/util/language_detection.js
+++ b/app/javascript/mastodon/features/compose/util/language_detection.js
@@ -65,13 +65,12 @@ let module;
 if (languageDetectorInGlobalThis) {
   if (!languageDetectorSupportedAndReady) {
     // …trigger the model download
-    self.LanguageDetector.create();
+    globalThis.LanguageDetector.create();
   }
   module = await import('./language_detection_with_languagedetector');
 } else {
   module = await import('./language_detection_with_laude');
 }
 const debouncedGuess = module.debouncedGuess;
-console.log(debouncedGuess)
 
 export { debouncedGuess, countLetters, ISO_639_MAP };
diff --git a/app/javascript/mastodon/features/compose/util/language_detection_with_languagedetector.js b/app/javascript/mastodon/features/compose/util/language_detection_with_languagedetector.js
index 3d98f236eb4..de5df6e0921 100644
--- a/app/javascript/mastodon/features/compose/util/language_detection_with_languagedetector.js
+++ b/app/javascript/mastodon/features/compose/util/language_detection_with_languagedetector.js
@@ -1,6 +1,5 @@
 import { debounce } from 'lodash';
 
-import { countLetters } from './language_detection';
 import { urlRegex } from './url_regex';
 
 const guessLanguage = async (text) => {
@@ -8,17 +7,15 @@ const guessLanguage = async (text) => {
     .replace(urlRegex, '')
     .replace(/(^|[^/\w])@(([a-z0-9_]+)@[a-z0-9.-]+[a-z0-9]+)/ig, '');
 
-  if (countLetters(text) > 5) {
-    try {
-      const languageDetector = await self.LanguageDetector.create();
-      let {detectedLanguage, confidence} = (await languageDetector.detect(text))[0];
-      if (confidence > 0.8) {
-        detectedLanguage = detectedLanguage.split('-')[0];
-        return detectedLanguage;
-      }
-    } catch {
-      return '';
+  try {
+    const languageDetector = await globalThis.LanguageDetector.create();
+    let {detectedLanguage, confidence} = (await languageDetector.detect(text))[0];
+    if (confidence > 0.8) {
+      detectedLanguage = detectedLanguage.split('-')[0];
+      return detectedLanguage;
     }
+  } catch {
+    return '';
   }
 
   return '';
@@ -26,23 +23,17 @@ const guessLanguage = async (text) => {
 
 const debouncedGuess = (() => {
   let resolver = null;
-  let rejecter = null;
 
-  const debounced = debounce(async (text) => {
-    try {
-      const result = await guessLanguage(text);
-      if (resolver) {
-        resolver(result);
-        resolver = null;
-      }
-    } catch {
-      rejecter('');
+  const debounced = debounce((text) => {
+    const result = guessLanguage(text);
+    if (resolver) {
+      resolver(result);
+      resolver = null;
     }
   }, 500, { maxWait: 1500, leading: true, trailing: true });
 
-  return (text) => new Promise((resolve, reject) => {
+  return (text) => new Promise((resolve) => {
     resolver = resolve;
-    rejecter = reject;
     debounced(text);
   });
 })();