Make classes more generic

cheuph/element_tree_renderer.py

@@ -0,0 +1,32 @@
+from abc import ABC, abstractmethod
+from dataclasses import dataclass
+from typing import Generic, TypeVar
+
+from .attributed_lines import AttributedLines
+from .element import Element, Id
+from .element_renderer import ElementRenderer
+from .element_supply import ElementSupply
+
+__all__ = ["ElementTreeRenderer", "CursorTreeRenderer"]
+
+E = TypeVar("E", bound=Element)
+
+class ElementTreeRenderer(ABC, Generic[E]):
+    def __init__(self,
+            supply: ElementSupply[E],
+            renderer: ElementRenderer[E],
+            ) -> None:
+        self.supply = supply
+        self.renderer = renderer
+
+        self.lines = AttributedLines()
+
+    @abstractmethod
+    def rerender(self) -> None:
+        pass
+
+class CursorTreeRenderer(ElementTreeRenderer[E]):
+    pass # TODO
+
+#class HighlightTreeRenderer(ElementTreeRenderer[E]):
+#    pass