Improve docs, error messages, and type annotations

masque/file/gdsii.py

@@ -10,6 +10,12 @@ Note that GDSII references follow the same convention as `masque`,
 
   Scaling, rotation, and mirroring apply to individual instances, not grid
    vectors or offsets.
+
+Notes:
+ * absolute positioning is not supported
+ * PLEX is not supported
+ * ELFLAGS are not supported
+ * GDS does not support library- or structure-level annotations
 """
 from typing import List, Any, Dict, Tuple, Callable, Union, Sequence, Iterable, Optional
 from typing import Sequence, Mapping
@@ -35,8 +41,6 @@ from ..repetition import Grid
 from ..utils import rotation_matrix_2d, get_bit, set_bit, vector2, is_scalar, layer_t
 from ..utils import remove_colinear_vertices, normalize_mirror, annotations_t
 
-#TODO absolute positioning
-
 
 logger = logging.getLogger(__name__)
 
@@ -127,8 +131,6 @@ def build(patterns: Union[Pattern, Sequence[Pattern]],
         structure = gdsii.structure.Structure(name=pat.name.encode('ASCII'))
         lib.append(structure)
 
-#        structure.properties = _annotations_to_properties(pat.annotations, 512)
-
         structure += _shapes_to_elements(pat.shapes)
         structure += _labels_to_texts(pat.labels)
         structure += _subpatterns_to_refs(pat.subpatterns)
@@ -243,9 +245,6 @@ def read(stream: io.BufferedIOBase,
     patterns = []
     for structure in lib:
         pat = Pattern(name=structure.name.decode('ASCII'))
-        if pat.annotations:
-            logger.warning('Dropping Pattern-level annotations; they are not supported by python-gdsii')
-#        pat.annotations = {str(k): v for k, v in structure.properties}
         for element in structure:
             # Switch based on element type:
             if isinstance(element, gdsii.elements.Boundary):
@@ -304,10 +303,8 @@ def _ref_to_subpat(element: Union[gdsii.elements.SRef,
     Helper function to create a SubPattern from an SREF or AREF. Sets subpat.pattern to None
      and sets the instance .identifier to (struct_name,).
 
-    BUG:
-        "Absolute" means not affected by parent elements.
-          That's not currently supported by masque at all, so need to either tag it and
-          undo the parent transformations, or implement it in masque.
+    NOTE: "Absolute" means not affected by parent elements.
+           That's not currently supported by masque at all (and not planned).
     """
     rotation = 0.0
     offset = numpy.array(element.xy[0], dtype=float)
@@ -320,12 +317,12 @@ def _ref_to_subpat(element: Union[gdsii.elements.SRef,
             scale = element.mag
             # Bit 13 means absolute scale
             if get_bit(element.strans, 15 - 13):
-                raise PatternError('Absolute scale is not implemented yet!')
+                raise PatternError('Absolute scale is not implemented in masque!')
         if element.angle is not None:
             rotation = numpy.deg2rad(element.angle)
             # Bit 14 means absolute rotation
             if get_bit(element.strans, 15 - 14):
-                raise PatternError('Absolute rotation is not implemented yet!')
+                raise PatternError('Absolute rotation is not implemented in masque!')
         # Bit 0 means mirror x-axis
         if get_bit(element.strans, 15 - 0):
             mirror_across_x = True

masque/file/oasis.py

@@ -47,7 +47,6 @@ path_cap_map = {
                 PathExtensionScheme.Arbitrary: Path.Cap.SquareCustom,
                }
 
-#TODO implement properties
 #TODO implement more shape types?
 
 def build(patterns: Union[Pattern, Sequence[Pattern]],

masque/pattern.py

@@ -18,7 +18,7 @@ from .shapes import Shape, Polygon
 from .label import Label
 from .utils import rotation_matrix_2d, vector2, normalize_mirror, AutoSlots, annotations_t
 from .error import PatternError, PatternLockedError
-from .traits import LockableImpl, AnnotatableImpl
+from .traits import LockableImpl, AnnotatableImpl, Scalable
 
 
 visitor_function_t = Callable[['Pattern', Tuple['Pattern'], Dict, numpy.ndarray], 'Pattern']

masque/shapes/shape.py

@@ -246,7 +246,7 @@ class Shape(PositionableImpl, LayerableImpl, DoseableImpl, Rotatable, Mirrorable
             List of `Polygon` objects with grid-aligned edges.
         """
         from . import Polygon
-        import skimage.measure
+        import skimage.measure      # type: ignore
         import float_raster
 
         grid_x = numpy.unique(grid_x)

masque/shapes/text.py

@@ -170,8 +170,8 @@ def get_char_as_polygons(font_path: str,
                          char: str,
                          resolution: float = 48*64,
                          ) -> Tuple[List[List[List[float]]], float]:
-    from freetype import Face
-    from matplotlib.path import Path
+    from freetype import Face           # type: ignore
+    from matplotlib.path import Path    # type: ignore
 
     """
     Get a list of polygons representing a single character.