9cb9e88678
Co-authored-by: L. Kärkkäinen <98187+Tronic@users.noreply.github.com> Co-authored-by: L. Karkkainen <tronic@users.noreply.github.com>
36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
from abc import ABCMeta
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from pathlib import Path
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from typing import Optional
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CURRENT_DIR = Path(__file__).parent
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def _extract_style(maybe_style: Optional[str], name: str) -> str:
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if maybe_style is not None:
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maybe_path = Path(maybe_style)
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if maybe_path.exists():
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return maybe_path.read_text(encoding="UTF-8")
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return maybe_style
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maybe_path = CURRENT_DIR / "styles" / f"{name}.css"
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if maybe_path.exists():
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return maybe_path.read_text(encoding="UTF-8")
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return ""
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class CSS(ABCMeta):
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"""Cascade stylesheets, i.e. combine all ancestor styles"""
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def __new__(cls, name, bases, attrs):
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Page = super().__new__(cls, name, bases, attrs)
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# Use a locally defined STYLE or the one from styles directory
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s = _extract_style(attrs.get("STYLE"), name)
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Page.STYLE = f"\n/* {name} */\n{s.strip()}\n" if s else ""
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# Combine with all ancestor styles
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Page.CSS = "".join(
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Class.STYLE
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for Class in reversed(Page.__mro__)
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if type(Class) is CSS
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)
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return Page
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