| from __future__ import annotations | |
| from fractions import Fraction | |
| from itertools import accumulate | |
| from typing import cast, Sequence | |
| from .css.scalar import Scalar | |
| from .geometry import Size | |
| def resolve( | |
| dimensions: Sequence[Scalar], | |
| total: int, | |
| gutter: int, | |
| size: Size, | |
| viewport: Size, | |
| ) -> list[tuple[int, int]]: | |
| """Resolve a list of dimensions. | |
| Args: | |
| dimensions (Sequence[Scalar]): Scalars for column / row sizes. | |
| total (int): Total space to divide. | |
| gutter (int): Gutter between rows / columns. | |
| size (Size): Size of container. | |
| viewport (Size): Size of viewport. | |
| Returns: | |
| list[tuple[int, int]]: List of (<OFFSET>, <LENGTH>) | |
| """ | |
| resolved: list[tuple[Scalar, Fraction | None]] = [ | |
| ( | |
| (scalar, None) | |
| if scalar.is_fraction | |
| else (scalar, scalar.resolve_dimension(size, viewport)) | |
| ) | |
| for scalar in dimensions | |
| ] | |
| from_float = Fraction.from_float | |
| total_fraction = from_float( | |
| sum(scalar.value for scalar, fraction in resolved if fraction is None) | |
| ) | |
| if total_fraction: | |
| total_gutter = gutter * (len(dimensions) - 1) | |
| consumed = sum(fraction for _, fraction in resolved if fraction is not None) | |
| remaining = max(Fraction(0), Fraction(total - total_gutter) - consumed) | |
| fraction_unit = Fraction(remaining, total_fraction) | |
| resolved_fractions = [ | |
| from_float(scalar.value) * fraction_unit if fraction is None else fraction | |
| for scalar, fraction in resolved | |
| ] | |
| else: | |
| resolved_fractions = cast( | |
| "list[Fraction]", [fraction for _, fraction in resolved] | |
| ) | |
| fraction_gutter = Fraction(gutter) | |
| offsets = [0] + [ | |
| int(fraction) | |
| for fraction in accumulate( | |
| value | |
| for fraction in resolved_fractions | |
| for value in (fraction, fraction_gutter) | |
| ) | |
| ] | |
| results = [ | |
| (offset1, offset2 - offset1) | |
| for offset1, offset2 in zip(offsets[::2], offsets[1::2]) | |
| ] | |
| return results | |