Add new functionality

src/ktools/django/jinja/extensions.py

@@ -1,3 +1,4 @@
+from types import FunctionType
 from django.conf import settings
 from django.utils.html import strip_spaces_between_tags
 from django.utils.translation import (
@@ -79,7 +80,7 @@ class JsMinExtension(Extension):
             [], [], body,
         ).set_lineno(lineno)
 
-    def _strip_whitespace_js(self, caller=None):
+    def _strip_whitespace_js(self, caller: FunctionType):
         if settings.DEBUG:
             # Debug mode, no minification
             return caller().strip()

src/ktools/django/utils/translation.py

@@ -0,0 +1,25 @@
+from django.utils.functional import lazy
+from django.utils.safestring import SafeString, _safety_decorator, mark_safe
+from django.utils.translation import gettext_lazy as _gettext_lazy
+
+from .types import StrOrPromise
+
+
+def _mark_safe(s):
+    """
+    Keep this in sync with `django.utils.safestring.mark_safe`!
+    This is separated because the `keep_lazy` decorator makes the
+    original `mark_safe` unpickable for cache storage.
+    So if you use the original, you'll get pickle errors from caching.
+    """
+    if hasattr(s, "__html__"):
+        return s
+    if callable(s):
+        return _safety_decorator(mark_safe, s)
+    return SafeString(s)
+
+
+def gettext_safelazy(message: StrOrPromise):
+    'Return a translated lazy `SafeString`.'
+    unsafe = _gettext_lazy(message=message)
+    return lazy(_mark_safe, SafeString)(s=unsafe)

src/ktools/django/utils/types.py

@@ -0,0 +1,3 @@
+from django.utils.functional import Promise
+
+StrOrPromise = str | Promise