[traits] Formalize Flippable and Pivotable depending on Positionable

masque/ports.py

@@ -11,7 +11,7 @@ import numpy
 from numpy import pi
 from numpy.typing import ArrayLike, NDArray
 
-from .traits import PositionableImpl, Rotatable, PivotableImpl, Copyable, Flippable
+from .traits import PositionableImpl, PivotableImpl, Copyable, Mirrorable, Flippable
 from .utils import rotate_offsets_around, rotation_matrix_2d
 from .error import PortError, format_stacktrace
 
@@ -20,7 +20,7 @@ logger = logging.getLogger(__name__)
 
 
 @functools.total_ordering
-class Port(PositionableImpl, Rotatable, PivotableImpl, Copyable, Flippable):
+class Port(PivotableImpl, PositionableImpl, Mirrorable, Flippable, Copyable):
     """
     A point at which a `Device` can be snapped to another `Device`.
 

masque/ref.py

@@ -15,8 +15,8 @@ from .utils import annotations_t, rotation_matrix_2d, annotations_eq, annotation
 from .repetition import Repetition
 from .traits import (
     PositionableImpl, RotatableImpl, ScalableImpl,
-    Mirrorable, PivotableImpl, Copyable, RepeatableImpl, AnnotatableImpl,
-    Flippable, FlippableImpl,
+    PivotableImpl, Copyable, RepeatableImpl, AnnotatableImpl,
+    FlippableImpl,
     )
 
 
@@ -26,9 +26,9 @@ if TYPE_CHECKING:
 
 @functools.total_ordering
 class Ref(
-        PositionableImpl, RotatableImpl, ScalableImpl, Mirrorable,
-        PivotableImpl, Copyable, RepeatableImpl, AnnotatableImpl,
-        FlippableImpl, Flippable,
+        FlippableImpl, PivotableImpl, RepeatableImpl, AnnotatableImpl,
+        PositionableImpl, RotatableImpl, ScalableImpl,
+        Copyable,
         ):
     """
     `Ref` provides basic support for nesting Pattern objects within each other.

masque/shapes/shape.py

@@ -6,8 +6,8 @@ import numpy
 from numpy.typing import NDArray, ArrayLike
 
 from ..traits import (
-    Rotatable, Copyable, Scalable, FlippableImpl,
-    Positionable, Pivotable, PivotableImpl, RepeatableImpl, AnnotatableImpl,
+    Copyable, Scalable, FlippableImpl,
+    PivotableImpl, RepeatableImpl, AnnotatableImpl,
     )
 
 if TYPE_CHECKING:
@@ -26,8 +26,8 @@ normalized_shape_tuple = tuple[
 DEFAULT_POLY_NUM_VERTICES = 24
 
 
-class Shape(Positionable, Rotatable, FlippableImpl, Copyable, Scalable,
-            AnnotatableImpl, RepeatableImpl, PivotableImpl, Pivotable,
+class Shape(FlippableImpl, PivotableImpl, RepeatableImpl, AnnotatableImpl,
+            Copyable, Scalable,
             metaclass=ABCMeta):
     """
     Class specifying functions common to all shapes.

masque/traits/mirrorable.py

@@ -1,14 +1,12 @@
-from typing import Self, cast, TYPE_CHECKING
+from typing import Self
 from abc import ABCMeta, abstractmethod
 
 import numpy
 from numpy.typing import NDArray
 
 from ..error import MasqueError
-from .repeatable import Repeatable
-
-if TYPE_CHECKING:
 from .positionable import Positionable
+from .repeatable import Repeatable
 
 
 class Mirrorable(metaclass=ABCMeta):
@@ -48,7 +46,7 @@ class Mirrorable(metaclass=ABCMeta):
         return self
 
 
-class Flippable(metaclass=ABCMeta):
+class Flippable(Positionable, metaclass=ABCMeta):
     """
     Trait class for entities which can be mirrored relative to an external line.
     """
@@ -85,22 +83,19 @@ class Flippable(metaclass=ABCMeta):
         pass
 
 
-class FlippableImpl(Flippable, Repeatable, metaclass=ABCMeta):
+class FlippableImpl(Flippable, Mirrorable, Repeatable, metaclass=ABCMeta):
     """
     Implementation of `Flippable` for objects which are `Mirrorable`, `Positionable`,
     and `Repeatable`.
     """
     __slots__ = ()
 
-    offset: NDArray[numpy.float64]
-    """ `[x_offset, y_offset]` """
-
     def flip_across(self, axis: int | None = None, *, x: float | None = None, y: float | None = None) -> Self:
         axis, pivot = self._check_flip_args(axis=axis, x=x, y=y)
-        cast('Positionable', self).translate(-pivot)
-        cast('Mirrorable', self).mirror(axis)
+        self.translate(-pivot)
+        self.mirror(axis)
         if self.repetition is not None:
             self.repetition.mirror(axis)
         self.offset[1 - axis] *= -1
-        cast('Positionable', self).translate(+pivot)
+        self.translate(+pivot)
         return self

masque/traits/rotatable.py

@@ -1,4 +1,4 @@
-from typing import Self, cast, Any, TYPE_CHECKING
+from typing import Self
 from abc import ABCMeta, abstractmethod
 
 import numpy
@@ -8,7 +8,6 @@ from numpy.typing import ArrayLike
 from ..error import MasqueError
 from ..utils import rotation_matrix_2d
 
-if TYPE_CHECKING:
 from .positionable import Positionable
 
 _empty_slots = ()     # Workaround to get mypy to ignore intentionally empty slots for superclass
@@ -81,7 +80,7 @@ class RotatableImpl(Rotatable, metaclass=ABCMeta):
         return self
 
 
-class Pivotable(metaclass=ABCMeta):
+class Pivotable(Positionable, metaclass=ABCMeta):
     """
     Trait class for entites which can be rotated around a point.
     This requires that they are `Positionable` but not necessarily `Rotatable` themselves.
@@ -103,20 +102,18 @@ class Pivotable(metaclass=ABCMeta):
         pass
 
 
-class PivotableImpl(Pivotable, metaclass=ABCMeta):
+class PivotableImpl(Pivotable, Rotatable, metaclass=ABCMeta):
     """
     Implementation of `Pivotable` for objects which are `Rotatable`
+    and `Positionable`.
     """
     __slots__ = ()
 
-    offset: Any         # TODO see if we can get around defining `offset` in  PivotableImpl
-    """ `[x_offset, y_offset]` """
-
     def rotate_around(self, pivot: ArrayLike, rotation: float) -> Self:
         pivot = numpy.asarray(pivot, dtype=float)
-        cast('Positionable', self).translate(-pivot)
-        cast('Rotatable', self).rotate(rotation)
+        self.translate(-pivot)
+        self.rotate(rotation)
         self.offset = numpy.dot(rotation_matrix_2d(rotation), self.offset)
-        cast('Positionable', self).translate(+pivot)
+        self.translate(+pivot)
         return self