Umut CANandClaude Opus 5
54fac471a9
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
67 lines
2.8 KiB
Python
67 lines
2.8 KiB
Python
"""Multileader style presets: arrow, landing gap, text style and height.
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Sized to match the dimension presets they sit beside (ISO-25: 2.5 mm arrows
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and lettering; ANSI: 3 mm), so a leader note and a dimension on the same
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sheet read at one size. Only ezdxf can author an MLEADERSTYLE object;
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ActiveX exposes no collection for it (see ``backends/contracts/styles.py``).
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"""
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from __future__ import annotations
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import math
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from typing import Any
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__all__ = ["MLEADER_KEYS", "MLEADER_PRESETS", "resolve_mleaderstyle"]
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MLEADER_PRESETS: dict[str, dict[str, Any]] = {
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"iso": {"arrow_size": 2.5, "landing_gap": 1.0, "text_style": "ISOCP", "text_height": 2.5},
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"ansi": {"arrow_size": 3.0, "landing_gap": 1.5, "text_style": "ROMANS", "text_height": 3.0},
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}
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MLEADER_KEYS: tuple[str, ...] = ("arrow_size", "landing_gap", "text_style", "text_height")
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_ILLEGAL_NAME_CHARS = frozenset('<>/\\":;?*|,=`')
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def _positive(key: str, value: Any, *, allow_zero: bool = False) -> float:
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if isinstance(value, bool) or not isinstance(value, (int, float)):
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raise TypeError(f"{key}: expected a number, got {type(value).__name__}")
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number = float(value)
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if not math.isfinite(number):
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raise ValueError(f"{key}: {value!r} is not a finite number")
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if number < 0.0 or (number == 0.0 and not allow_zero):
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raise ValueError(f"{key}: {value!r} must be greater than 0")
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return number
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def resolve_mleaderstyle(preset: str, overrides: dict | None = None) -> dict[str, Any]:
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"""The preset's four values with ``overrides`` applied; refusals name the key."""
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key = str(preset).strip().lower() if preset is not None else ""
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if key not in MLEADER_PRESETS:
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raise ValueError(f"preset: unknown value {preset!r}; use one of {sorted(MLEADER_PRESETS)}")
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values = dict(MLEADER_PRESETS[key])
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if overrides is None:
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return values
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if not isinstance(overrides, dict):
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raise TypeError(f"overrides: expected a mapping, got {type(overrides).__name__}")
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for raw_key, value in overrides.items():
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name = str(raw_key).strip().lower()
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if name not in MLEADER_KEYS:
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raise ValueError(
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f"overrides: {raw_key!r} is not a leader style key; allowed: {list(MLEADER_KEYS)}"
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)
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if name == "text_style":
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if not isinstance(value, str) or not value.strip():
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raise ValueError("text_style: a text style name cannot be empty")
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bad = sorted(set(value.strip()) & _ILLEGAL_NAME_CHARS)
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if bad:
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raise ValueError(
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f"text_style: {value!r} contains characters DXF forbids in a name: {bad}"
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)
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values[name] = value.strip()
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elif name == "landing_gap":
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values[name] = _positive(name, value, allow_zero=True)
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else:
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values[name] = _positive(name, value)
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return values
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