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46 lines
1.5 KiB
46 lines
1.5 KiB
from panflute import Space, SoftBreak, Str, Math
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from typing import Union
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# Import local files
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from .context import Context
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Whitespace = Union[Space,SoftBreak]
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class NBSP(Space):
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pass
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# This function tries to determine if a space should be non-breaking. It is
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# language-aware and tries to be sort-of smart about its decisions.
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def bavlna(e: Whitespace, c: Context) -> bool:
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if c.get_metadata("lang") == "cs":
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# Add no-break space after single letter prepositions and conjunctions.
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# Also tries to find them inside elements, for instance
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# `V [odevzdávátku]()` should get correctly detected.
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prev = e.prev if isinstance(e.prev, Str) else (e.prev.content[-1] if hasattr(e.prev, "content") and len(e.prev.content) != 0 else None)
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next = e.next if isinstance(e.next, Str) else (e.next.content[0] if hasattr(e.next, "content") and len(e.next.content) != 0 else None)
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if isinstance(prev, Str) and isinstance(next, Str):
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if prev.text.lower() in ['k', 's', 'v', 'z', 'o', 'u', 'a', 'i']:
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return True
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if isinstance(e.prev, Str) and isinstance(e.next, Str):
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# Add no-break space between numbers or numbers and operators.
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prevC = e.prev.text[-1]
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nextC = e.next.text[0]
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numbers = ["0123456789"]
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operators = ["+-/*^%:"]
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if prevC in numbers and nextC in numbers:
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return True
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if prevC in numbers and nextC in operators:
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return True
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if prevC in operators and nextC in numbers:
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return True
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# if isinstance(e.prev, Math) or isinstance(e.next, Math):
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# # Add no-break spaces around TeX math.
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# return True
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return False
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