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Krzysztof kuhy Rudnicki
cbcee98d94
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
88 lines
3.2 KiB
Python
88 lines
3.2 KiB
Python
"""The canonical structural-token table: spacing, radius, type, shadow, motion.
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Colour is `palette_map.py`; this is its twin for everything that is not a
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colour. Pure data -- parsing and comparison live in `structural_check.py`.
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A canonical key is `<kind>.<name>` (`space.sm`, `duration.fast`) and is also
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the key the prose freezes (`DOCS-tokens.md`, `DOCS-motion.md`) are parsed
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into, so the md stack needs no column of its own. A `None` name means the
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token is intentionally absent from that stack and `why` must say so: an
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honest `n/a` with a reason, never a fabricated constant.
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"""
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from __future__ import annotations
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from dataclasses import dataclass
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STACKS = ("css", "dart", "tk")
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@dataclass(frozen=True)
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class Token:
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"""One canonical structural token and its name in each code stack."""
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canonical: str
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css: str | None
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dart: str | None
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tk: str | None
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why: str = ""
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def __post_init__(self) -> None:
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"""Refuse an absence that carries no recorded reason."""
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if None in (self.css, self.dart, self.tk) and not self.why:
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msg = f"{self.canonical}: a stack is n/a but `why` is empty"
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raise ValueError(msg)
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_TK_NO_RADIUS = "Tk has no corner-radius primitive: widgets are square."
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_TK_NO_MOTION = "Tkinter has no animation framework; a duration would be dead."
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_NO_SHADOW = (
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"Dark-first Flutter/Tk surfaces take no shadow (elevation is a fill step); "
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"only web light surfaces opt in."
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)
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_STEPS = ("xs", "sm", "md", "lg", "xl", "xxl")
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_TYPE = ("display", "title", "subtitle", "body", "label", "caption")
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TOKENS: tuple[Token, ...] = (
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*(
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Token(f"space.{s}", f"--space-{i}", f"AppSpacing.{s}", f"LockSpacing.{s}")
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for i, s in enumerate(_STEPS, 1)
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),
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*(
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Token(f"radius.{s}", f"--radius-{s}", f"AppRadius.{s}", None, _TK_NO_RADIUS)
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for s in ("sm", "md", "lg")
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),
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*(
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Token(f"text.{t}", f"--text-{t}", f"AppTextSize.{t}", f"LockTypography.{t}")
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for t in _TYPE
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),
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*(Token(f"shadow.{n}", f"--shadow-{n}", None, None, _NO_SHADOW) for n in (1, 2)),
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*(
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Token(f"duration.{d}", f"--duration-{d}", f"AppDuration.{d}", None, _TK_NO_MOTION)
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for d in ("instant", "fast", "base", "slow")
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),
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*(
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Token(f"ease.{e}", f"--ease-{e}", f"AppCurve.{e}", None, _TK_NO_MOTION)
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for e in ("standard", "decelerate", "accelerate")
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),
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)
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# Names a source defines that are deliberately outside the compared scales.
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# Per stack, name -> reason. A silent skip is the fail-open path this closes.
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_TRACKING = "Tracking is an approximate range in the freeze ('tight, e.g. -0.2px'), not a value."
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EXEMPT: dict[str, dict[str, str]] = {
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"css": {
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"--tracking-display": _TRACKING,
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"--tracking-title": _TRACKING,
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"--tracking-label": _TRACKING,
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"--tracking-caption": _TRACKING,
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"--font-sans": "Font stacks are per-platform by design (DOCS-tokens.md, Typography).",
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"--font-mono": "Font stacks are per-platform by design (DOCS-tokens.md, Typography).",
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"--measure": "Web-only prose line-length cap (rule 21); no Dart/Tk text measure.",
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},
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"dart": {},
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"tk": {
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"LockSpacing.focus_thickness": "Focus-ring width (operability doc), not a scale step.",
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},
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}
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