Make classes more generic

cheuph/element_renderer.py

@@ -0,0 +1,18 @@
+from abc import ABC, abstractmethod
+from typing import Generic, List, TypeVar
+
+from .element import Element, RenderedElement, MetaRenderedElement
+from .markup import AttributedText
+
+__all__ = ["ElementRenderer"]
+
+E = TypeVar("E", bound=Element)
+
+class ElementRenderer(ABC, Generic[E]):
+    """
+    Knows how to render elements.
+    """
+
+    @abstractmethod
+    def render(self, element: E, width: int) -> RenderedElement:
+        pass