Explicit is better than implicit

src/django_bootstrap5/core.py

@@ -17,6 +17,7 @@
     "javascript_in_head": False,
     "horizontal_label_class": "col-sm-2",
     "horizontal_field_class": "col-sm-10",
+    "horizontal_field_offset_class": "offset-sm-2",
     "set_placeholder": True,
     "required_css_class": "",
     "error_css_class": "is-invalid",

src/django_bootstrap5/renderers.py

@@ -51,6 +51,9 @@ def __init__(self, *args, **kwargs):
         self.horizontal_field_class = kwargs.get(
             "horizontal_field_class", get_bootstrap_setting("horizontal_field_class")
         )
+        self.horizontal_field_offset_class = kwargs.get(
+            "horizontal_field_offset_class", get_bootstrap_setting("horizontal_field_offset_class")
+        )
         self.inline_field_class = kwargs.get("inline_field_class", get_bootstrap_setting("inline_field_class"))
         self.error_css_class = kwargs.get("error_css_class", None)
         self.required_css_class = kwargs.get("required_css_class", None)
@@ -260,19 +263,8 @@ def __init__(self, field, *args, **kwargs):
         self.help_text = text_value(field.help_text) if self.show_help and field.help_text else ""
         self.field_errors = [conditional_escape(text_value(error)) for error in field.errors]
         self.form_check_class = kwargs.get("form_check_class", "form-check")
-        self.horizontal_offset_class = self.horizontal_label_class.replace("col", "offset")
-
-        if "placeholder" in kwargs:
-            # Find the placeholder in kwargs, even if it's empty
-            self.placeholder = kwargs["placeholder"]
-        elif get_bootstrap_setting("set_placeholder"):
-            # If not found, see if we set the label
-            self.placeholder = field.label
-        else:
-            # Or just set it to empty
-            self.placeholder = ""
-        if self.placeholder:
-            self.placeholder = text_value(self.placeholder)
+
+        self.placeholder = text_value(kwargs.get("placeholder", self.default_placeholder))
 
         self.addon_before = kwargs.get("addon_before", self.widget.attrs.pop("addon_before", ""))
         self.addon_after = kwargs.get("addon_after", self.widget.attrs.pop("addon_after", ""))
@@ -311,6 +303,11 @@ def __init__(self, field, *args, **kwargs):
     def is_floating(self):
         return super().is_floating and self.can_widget_float(self.widget) and self.is_widget_form_control(self.widget)
 
+    @property
+    def default_placeholder(self):
+        """Return default placeholder for field."""
+        return self.field.label if get_bootstrap_setting("set_placeholder") else ""
+
     def restore_widget_attrs(self):
         self.widget.attrs = self.initial_attrs.copy()
 
@@ -477,7 +474,7 @@ def render(self):
             label = mark_safe("")
             if isinstance(self.widget, CheckboxInput):
                 field = format_html('<div class="form-check">{}</div>', field)
-            horizontal_class = merge_css_classes(self.horizontal_field_class, self.horizontal_offset_class)
+            horizontal_class = merge_css_classes(self.horizontal_field_class, self.horizontal_field_offset_class)
         else:
             label = self.get_label_html(horizontal=self.is_horizontal)
             horizontal_class = self.horizontal_field_class