[fix] calculator: use locale from UI (not from selected language)

Closes: https://github.com/searxng/searxng/issues/3956
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

2 files changed, 10 insertions, 6 deletions

diff --git a/searx/plugins/calculator.py b/searx/plugins/calculator.py
index 403b04d57..e92ff9d91 100644
--- a/searx/plugins/calculator.py
+++ b/searx/plugins/calculator.py
@@ -8,7 +8,8 @@ import operator
 from multiprocessing import Process, Queue
 from typing import Callable
 
-import babel.numbers
+import flask
+import babel
 from flask_babel import gettext
 
 from searx.plugins import logger
@@ -100,14 +101,17 @@ def post_search(_request, search):
     # replace commonly used math operators with their proper Python operator
     query = query.replace("x", "*").replace(":", "/")
 
+    # use UI language
+    ui_locale = babel.Locale.parse(flask.request.preferences.get_value('locale'), sep='-')
+
     # parse the number system in a localized way
     def _decimal(match: re.Match) -> str:
         val = match.string[match.start() : match.end()]
-        val = babel.numbers.parse_decimal(val, search.search_query.locale, numbering_system="latn")
+        val = babel.numbers.parse_decimal(val, ui_locale, numbering_system="latn")
         return str(val)
 
-    decimal = search.search_query.locale.number_symbols["latn"]["decimal"]
-    group = search.search_query.locale.number_symbols["latn"]["group"]
+    decimal = ui_locale.number_symbols["latn"]["decimal"]
+    group = ui_locale.number_symbols["latn"]["group"]
     query = re.sub(f"[0-9]+[{decimal}|{group}][0-9]+[{decimal}|{group}]?[0-9]?", _decimal, query)
 
     # only numbers and math operators are accepted
@@ -121,6 +125,6 @@ def post_search(_request, search):
     result = timeout_func(0.05, _eval_expr, query_py_formatted)
     if result is None or result == "":
         return True
-    result = babel.numbers.format_decimal(result, locale=search.search_query.locale)
+    result = babel.numbers.format_decimal(result, locale=ui_locale)
     search.result_container.answers['calculate'] = {'answer': f"{search.search_query.query} = {result}"}
     return True
diff --git a/searx/webapp.py b/searx/webapp.py
index 19c477794..d2d486d20 100755
--- a/searx/webapp.py
+++ b/searx/webapp.py
@@ -517,7 +517,7 @@ def pre_request():
         preferences.parse_dict({"language": language})
         logger.debug('set language %s (from browser)', preferences.get_value("language"))
 
-    # locale is defined neither in settings nor in preferences
+    # UI locale is defined neither in settings nor in preferences
     # use browser headers
     if not preferences.get_value("locale"):
         locale = _get_browser_language(request, LOCALE_NAMES.keys())