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46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
from __future__ import annotations
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from typing import Iterable
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from prompt_toolkit.document import Document
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from .base import CompleteEvent, Completer, Completion
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__all__ = ["DeduplicateCompleter"]
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class DeduplicateCompleter(Completer):
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"""
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Wrapper around a completer that removes duplicates. Only the first unique
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completions are kept.
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Completions are considered to be a duplicate if they result in the same
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document text when they would be applied.
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"""
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def __init__(self, completer: Completer) -> None:
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self.completer = completer
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def get_completions(
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self, document: Document, complete_event: CompleteEvent
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) -> Iterable[Completion]:
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# Keep track of the document strings we'd get after applying any completion.
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found_so_far: set[str] = set()
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for completion in self.completer.get_completions(document, complete_event):
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text_if_applied = (
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document.text[: document.cursor_position + completion.start_position]
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+ completion.text
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+ document.text[document.cursor_position :]
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)
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if text_if_applied == document.text:
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# Don't include completions that don't have any effect at all.
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continue
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if text_if_applied in found_so_far:
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continue
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found_so_far.add(text_if_applied)
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yield completion
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