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367 lines
13 KiB
Python
367 lines
13 KiB
Python
from typing import Dict, Iterable, List, Tuple, KeysView, ValuesView
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from typing import overload, Union, Optional, TypeVar
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import warnings
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import traceback
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import logging
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from collections import Counter
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from abc import ABCMeta, abstractmethod
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import numpy
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from numpy import pi
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from numpy.typing import ArrayLike, NDArray
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from .traits import PositionableImpl, Rotatable, PivotableImpl, Copyable, Mirrorable
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from .utils import rotate_offsets_around
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from .error import PortError
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logger = logging.getLogger(__name__)
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P = TypeVar('P', bound='Port')
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PL = TypeVar('PL', bound='PortList')
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PL2 = TypeVar('PL2', bound='PortList')
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class Port(PositionableImpl, Rotatable, PivotableImpl, Copyable, Mirrorable):
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"""
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A point at which a `Device` can be snapped to another `Device`.
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Each port has an `offset` ((x, y) position) and may also have a
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`rotation` (orientation) and a `ptype` (port type).
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The `rotation` is an angle, in radians, measured counterclockwise
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from the +x axis, pointing inwards into the device which owns the port.
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The rotation may be set to `None`, indicating that any orientation is
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allowed (e.g. for a DC electrical port). It is stored modulo 2pi.
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The `ptype` is an arbitrary string, default of `unk` (unknown).
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"""
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__slots__ = (
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'ptype', '_rotation',
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# inherited:
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'_offset',
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)
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_rotation: Optional[float]
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""" radians counterclockwise from +x, pointing into device body.
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Can be `None` to signify undirected port """
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ptype: str
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""" Port types must match to be plugged together if both are non-zero """
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def __init__(
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self,
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offset: ArrayLike,
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rotation: Optional[float],
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ptype: str = 'unk',
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) -> None:
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self.offset = offset
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self.rotation = rotation
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self.ptype = ptype
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@property
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def rotation(self) -> Optional[float]:
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""" Rotation, radians counterclockwise, pointing into device body. Can be None. """
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return self._rotation
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@rotation.setter
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def rotation(self, val: float) -> None:
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if val is None:
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self._rotation = None
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else:
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if not numpy.size(val) == 1:
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raise PortError('Rotation must be a scalar')
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self._rotation = val % (2 * pi)
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def get_bounds(self):
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return numpy.vstack((self.offset, self.offset))
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def set_ptype(self: P, ptype: str) -> P:
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""" Chainable setter for `ptype` """
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self.ptype = ptype
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return self
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def mirror(self: P, axis: int) -> P:
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self.offset[1 - axis] *= -1
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if self.rotation is not None:
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self.rotation *= -1
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self.rotation += axis * pi
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return self
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def rotate(self: P, rotation: float) -> P:
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if self.rotation is not None:
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self.rotation += rotation
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return self
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def set_rotation(self: P, rotation: Optional[float]) -> P:
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self.rotation = rotation
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return self
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def __repr__(self) -> str:
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if self.rotation is None:
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rot = 'any'
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else:
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rot = str(numpy.rad2deg(self.rotation))
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return f'<{self.offset}, {rot}, [{self.ptype}]>'
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class PortList(metaclass=ABCMeta):
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__slots__ = () # Allow subclasses to use __slots__
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@property
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@abstractmethod
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def ports(self) -> Dict[str, Port]:
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""" Uniquely-named ports which can be used to snap to other Device instances"""
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pass
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@ports.setter
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@abstractmethod
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def ports(self, value: Dict[str, Port]) -> None:
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pass
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@overload
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def __getitem__(self, key: str) -> Port:
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pass
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@overload
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def __getitem__(self, key: Union[List[str], Tuple[str, ...], KeysView[str], ValuesView[str]]) -> Dict[str, Port]:
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pass
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def __getitem__(self, key: Union[str, Iterable[str]]) -> Union[Port, Dict[str, Port]]:
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"""
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For convenience, ports can be read out using square brackets:
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- `pattern['A'] == Port((0, 0), 0)`
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- ```
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pattern[['A', 'B']] == {
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'A': Port((0, 0), 0),
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'B': Port((0, 0), pi),
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}
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```
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"""
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if isinstance(key, str):
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return self.ports[key]
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else:
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return {k: self.ports[k] for k in key}
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# NOTE: Didn't add keys(), items(), values(), __contains__(), etc.
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# because it's weird on stuff like Pattern that contains other lists
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# and because you can just grab .ports and use that instead
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def rename_ports(
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self: PL,
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mapping: Dict[str, Optional[str]],
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overwrite: bool = False,
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) -> PL:
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"""
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Renames ports as specified by `mapping`.
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Ports can be explicitly deleted by mapping them to `None`.
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Args:
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mapping: Dict of `{'old_name': 'new_name'}` pairs. Names can be mapped
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to `None` to perform an explicit deletion. `'new_name'` can also
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overwrite an existing non-renamed port to implicitly delete it if
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`overwrite` is set to `True`.
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overwrite: Allows implicit deletion of ports if set to `True`; see `mapping`.
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Returns:
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self
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"""
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if not overwrite:
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duplicates = (set(self.ports.keys()) - set(mapping.keys())) & set(mapping.values())
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if duplicates:
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raise PortError(f'Unrenamed ports would be overwritten: {duplicates}')
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renamed = {mapping[k]: self.ports.pop(k) for k in mapping.keys()}
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if None in renamed:
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del renamed[None]
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self.ports.update(renamed) # type: ignore
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return self
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def add_port_pair(
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self: PL,
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offset: ArrayLike = (0, 0),
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rotation: float = 0.0,
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names: Tuple[str, str] = ('A', 'B'),
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ptype: str = 'unk',
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) -> PL:
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"""
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Add a pair of ports with opposing directions at the specified location.
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Args:
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offset: Location at which to add the ports
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rotation: Orientation of the first port. Radians, counterclockwise.
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Default 0.
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names: Names for the two ports. Default 'A' and 'B'
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ptype: Sets the port type for both ports.
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Returns:
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self
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"""
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new_ports = {
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names[0]: Port(offset, rotation=rotation, ptype=ptype),
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names[1]: Port(offset, rotation=rotation + pi, ptype=ptype),
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}
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self.check_ports(names)
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self.ports.update(new_ports)
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return self
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def check_ports(
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self: PL,
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other_names: Iterable[str],
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map_in: Optional[Dict[str, str]] = None,
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map_out: Optional[Dict[str, Optional[str]]] = None,
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) -> PL:
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"""
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Given the provided port mappings, check that:
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- All of the ports specified in the mappings exist
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- There are no duplicate port names after all the mappings are performed
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Args:
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other_names: List of port names being considered for inclusion into
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`self.ports` (before mapping)
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map_in: Dict of `{'self_port': 'other_port'}` mappings, specifying
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port connections between the two devices.
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map_out: Dict of `{'old_name': 'new_name'}` mappings, specifying
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new names for unconnected `other_names` ports.
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Returns:
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self
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Raises:
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`PortError` if any ports specified in `map_in` or `map_out` do not
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exist in `self.ports` or `other_names`.
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`PortError` if there are any duplicate names after `map_in` and `map_out`
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are applied.
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"""
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if map_in is None:
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map_in = {}
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if map_out is None:
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map_out = {}
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other = set(other_names)
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missing_inkeys = set(map_in.keys()) - set(self.ports.keys())
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if missing_inkeys:
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raise PortError(f'`map_in` keys not present in device: {missing_inkeys}')
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missing_invals = set(map_in.values()) - other
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if missing_invals:
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raise PortError(f'`map_in` values not present in other device: {missing_invals}')
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missing_outkeys = set(map_out.keys()) - other
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if missing_outkeys:
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raise PortError(f'`map_out` keys not present in other device: {missing_outkeys}')
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orig_remaining = set(self.ports.keys()) - set(map_in.keys())
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other_remaining = other - set(map_out.keys()) - set(map_in.values())
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mapped_vals = set(map_out.values())
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mapped_vals.discard(None)
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conflicts_final = orig_remaining & (other_remaining | mapped_vals)
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if conflicts_final:
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raise PortError(f'Device ports conflict with existing ports: {conflicts_final}')
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conflicts_partial = other_remaining & mapped_vals
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if conflicts_partial:
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raise PortError(f'`map_out` targets conflict with non-mapped outputs: {conflicts_partial}')
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map_out_counts = Counter(map_out.values())
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map_out_counts[None] = 0
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conflicts_out = {k for k, v in map_out_counts.items() if v > 1}
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if conflicts_out:
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raise PortError(f'Duplicate targets in `map_out`: {conflicts_out}')
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return self
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def find_transform(
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self: PL,
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other: PL2,
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map_in: Dict[str, str],
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*,
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mirrored: Tuple[bool, bool] = (False, False),
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set_rotation: Optional[bool] = None,
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) -> Tuple[NDArray[numpy.float64], float, NDArray[numpy.float64]]:
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"""
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Given a device `other` and a mapping `map_in` specifying port connections,
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find the transform which will correctly align the specified ports.
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Args:
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other: a device
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map_in: Dict of `{'self_port': 'other_port'}` mappings, specifying
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port connections between the two devices.
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mirrored: Mirrors `other` across the x or y axes prior to
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connecting any ports.
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set_rotation: If the necessary rotation cannot be determined from
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the ports being connected (i.e. all pairs have at least one
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port with `rotation=None`), `set_rotation` must be provided
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to indicate how much `other` should be rotated. Otherwise,
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`set_rotation` must remain `None`.
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Returns:
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- The (x, y) translation (performed last)
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- The rotation (radians, counterclockwise)
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- The (x, y) pivot point for the rotation
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The rotation should be performed before the translation.
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"""
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s_ports = self[map_in.keys()]
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o_ports = other[map_in.values()]
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s_offsets = numpy.array([p.offset for p in s_ports.values()])
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o_offsets = numpy.array([p.offset for p in o_ports.values()])
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s_types = [p.ptype for p in s_ports.values()]
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o_types = [p.ptype for p in o_ports.values()]
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s_rotations = numpy.array([p.rotation if p.rotation is not None else 0 for p in s_ports.values()])
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o_rotations = numpy.array([p.rotation if p.rotation is not None else 0 for p in o_ports.values()])
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s_has_rot = numpy.array([p.rotation is not None for p in s_ports.values()], dtype=bool)
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o_has_rot = numpy.array([p.rotation is not None for p in o_ports.values()], dtype=bool)
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has_rot = s_has_rot & o_has_rot
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if mirrored[0]:
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o_offsets[:, 1] *= -1
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o_rotations *= -1
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if mirrored[1]:
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o_offsets[:, 0] *= -1
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o_rotations *= -1
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o_rotations += pi
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type_conflicts = numpy.array([st != ot and st != 'unk' and ot != 'unk'
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for st, ot in zip(s_types, o_types)])
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if type_conflicts.any():
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msg = 'Ports have conflicting types:\n'
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for nn, (k, v) in enumerate(map_in.items()):
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if type_conflicts[nn]:
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msg += f'{k} | {s_types[nn]}:{o_types[nn]} | {v}\n'
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msg = ''.join(traceback.format_stack()) + '\n' + msg
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warnings.warn(msg, stacklevel=2)
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rotations = numpy.mod(s_rotations - o_rotations - pi, 2 * pi)
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if not has_rot.any():
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if set_rotation is None:
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PortError('Must provide set_rotation if rotation is indeterminate')
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rotations[:] = set_rotation
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else:
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rotations[~has_rot] = rotations[has_rot][0]
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if not numpy.allclose(rotations[:1], rotations):
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rot_deg = numpy.rad2deg(rotations)
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msg = 'Port orientations do not match:\n'
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for nn, (k, v) in enumerate(map_in.items()):
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msg += f'{k} | {rot_deg[nn]:g} | {v}\n'
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raise PortError(msg)
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pivot = o_offsets[0].copy()
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rotate_offsets_around(o_offsets, pivot, rotations[0])
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translations = s_offsets - o_offsets
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if not numpy.allclose(translations[:1], translations):
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msg = 'Port translations do not match:\n'
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for nn, (k, v) in enumerate(map_in.items()):
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msg += f'{k} | {translations[nn]} | {v}\n'
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raise PortError(msg)
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return translations[0], rotations[0], o_offsets[0]
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