Enable animating offset with string. Textualize#3028

src/textual/css/scalar.py

@@ -367,6 +367,24 @@ def resolve(self, size: Size, viewport: Size) -> Offset:
             round(y.resolve(size, viewport)),
         )
 
+    @classmethod
+    def parse(cls, token: str) -> ScalarOffset:
+        """Create a scalar offset from a string.
+
+        Args:
+            token: String to parse (e.g. '1 2' or '1.0 2.0')
+
+        Returns:
+            New offset
+        """
+        x, y = token.split()
+        # fmt: off
+        return cls(
+            Scalar.parse(x, Unit.WIDTH),
+            Scalar.parse(y, Unit.HEIGHT)
+        )
+        # fmt: on
+
 
 NULL_SCALAR = ScalarOffset(Scalar.from_number(0), Scalar.from_number(0))
 

tests/test_animation.py

@@ -48,6 +48,8 @@ async def test_animate_height() -> None:
     Offset(10, 5),
     (10, 5),
     (10.0, 5.0),
+    "10 5",
+    "10.0 5.0",
 ]