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from __future__ import annotations
from typing import TYPE_CHECKING, cast
from contourpy._contourpy import FillType, LineType
from contourpy.array import (
concat_codes_or_none, concat_offsets_or_none, concat_points_or_none,
concat_points_or_none_with_nan,
)
from contourpy.enum_util import as_fill_type, as_line_type
from contourpy.typecheck import check_filled, check_lines
if TYPE_CHECKING:
import contourpy._contourpy as cpy
def dechunk_filled(filled: cpy.FillReturn, fill_type: FillType | str) -> cpy.FillReturn:
"""Return the specified filled contours with all chunked data moved into the first chunk.
Filled contours that are not chunked (``FillType.OuterCode`` and ``FillType.OuterOffset``) and
those that are but only contain a single chunk are returned unmodified. Individual polygons are
unchanged, they are not geometrically combined.
Args:
filled (sequence of arrays): Filled contour data as returned by
:func:`~contourpy.ContourGenerator.filled`.
fill_type (FillType or str): Type of ``filled`` as enum or string equivalent.
Return:
Filled contours in a single chunk.
.. versionadded:: 1.2.0
"""
fill_type = as_fill_type(fill_type)
if fill_type in (FillType.OuterCode, FillType.OuterOffset):
# No-op if fill_type is not chunked.
return filled
check_filled(filled, fill_type)
if len(filled[0]) < 2:
# No-op if just one chunk.
return filled
if TYPE_CHECKING:
filled = cast(cpy.FillReturn_Chunk, filled)
points = concat_points_or_none(filled[0])
if fill_type == FillType.ChunkCombinedCode:
if TYPE_CHECKING:
filled = cast(cpy.FillReturn_ChunkCombinedCode, filled)
if points is None:
ret1: cpy.FillReturn_ChunkCombinedCode = ([None], [None])
else:
ret1 = ([points], [concat_codes_or_none(filled[1])])
return ret1
elif fill_type == FillType.ChunkCombinedOffset:
if TYPE_CHECKING:
filled = cast(cpy.FillReturn_ChunkCombinedOffset, filled)
if points is None:
ret2: cpy.FillReturn_ChunkCombinedOffset = ([None], [None])
else:
ret2 = ([points], [concat_offsets_or_none(filled[1])])
return ret2
elif fill_type == FillType.ChunkCombinedCodeOffset:
if TYPE_CHECKING:
filled = cast(cpy.FillReturn_ChunkCombinedCodeOffset, filled)
if points is None:
ret3: cpy.FillReturn_ChunkCombinedCodeOffset = ([None], [None], [None])
else:
outer_offsets = concat_offsets_or_none(filled[2])
ret3 = ([points], [concat_codes_or_none(filled[1])], [outer_offsets])
return ret3
elif fill_type == FillType.ChunkCombinedOffsetOffset:
if TYPE_CHECKING:
filled = cast(cpy.FillReturn_ChunkCombinedOffsetOffset, filled)
if points is None:
ret4: cpy.FillReturn_ChunkCombinedOffsetOffset = ([None], [None], [None])
else:
outer_offsets = concat_offsets_or_none(filled[2])
ret4 = ([points], [concat_offsets_or_none(filled[1])], [outer_offsets])
return ret4
else:
raise ValueError(f"Invalid FillType {fill_type}")
def dechunk_lines(lines: cpy.LineReturn, line_type: LineType | str) -> cpy.LineReturn:
"""Return the specified contour lines with all chunked data moved into the first chunk.
Contour lines that are not chunked (``LineType.Separate`` and ``LineType.SeparateCode``) and
those that are but only contain a single chunk are returned unmodified. Individual lines are
unchanged, they are not geometrically combined.
Args:
lines (sequence of arrays): Contour line data as returned by
:func:`~contourpy.ContourGenerator.lines`.
line_type (LineType or str): Type of ``lines`` as enum or string equivalent.
Return:
Contour lines in a single chunk.
.. versionadded:: 1.2.0
"""
line_type = as_line_type(line_type)
if line_type in (LineType.Separate, LineType.SeparateCode):
# No-op if line_type is not chunked.
return lines
check_lines(lines, line_type)
if len(lines[0]) < 2:
# No-op if just one chunk.
return lines
if TYPE_CHECKING:
lines = cast(cpy.LineReturn_Chunk, lines)
if line_type == LineType.ChunkCombinedCode:
if TYPE_CHECKING:
lines = cast(cpy.LineReturn_ChunkCombinedCode, lines)
points = concat_points_or_none(lines[0])
if points is None:
ret1: cpy.LineReturn_ChunkCombinedCode = ([None], [None])
else:
ret1 = ([points], [concat_codes_or_none(lines[1])])
return ret1
elif line_type == LineType.ChunkCombinedOffset:
if TYPE_CHECKING:
lines = cast(cpy.LineReturn_ChunkCombinedOffset, lines)
points = concat_points_or_none(lines[0])
if points is None:
ret2: cpy.LineReturn_ChunkCombinedOffset = ([None], [None])
else:
ret2 = ([points], [concat_offsets_or_none(lines[1])])
return ret2
elif line_type == LineType.ChunkCombinedNan:
if TYPE_CHECKING:
lines = cast(cpy.LineReturn_ChunkCombinedNan, lines)
points = concat_points_or_none_with_nan(lines[0])
ret3: cpy.LineReturn_ChunkCombinedNan = ([points],)
return ret3
else:
raise ValueError(f"Invalid LineType {line_type}")
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