fix(tools.widgets): add utils functions

trame/tools/widgets/utils.py

@@ -0,0 +1,21 @@
+import re
+
+camel_pattern = re.compile(r"(?<!^)(?=[A-Z])")
+
+
+def camel_to_dash(value):
+    "MySuperWidget => my-super-widget"
+    return camel_pattern.sub("-", value).lower()
+
+
+def attr_to_py(value):
+    """
+    top-left                => "top_left"
+    top-left:default        => ("top_left_default", "top-left:default")
+    v-slot:default.modifier => ("v_slot_default_modifier", "v-slot:default.modifier")
+    """
+    py_name = value.replace("-", "_")
+    if "." in value or ":" in value:
+        py_name = py_name.replace(".", "_").replace(":", "_")
+        return [py_name, value]
+    return py_name