42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
from typing import Any, Optional
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from ..element import Element
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from .label import Label
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class Log(Element, component='log.js', default_classes='nicegui-log'):
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def __init__(self, max_lines: Optional[int] = None) -> None:
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"""Log View
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Create a log view that allows to add new lines without re-transmitting the whole history to the client.
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:param max_lines: maximum number of lines before dropping oldest ones (default: `None`)
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"""
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super().__init__()
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self.max_lines = max_lines
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def push(self, line: Any, *,
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classes: Optional[str] = None,
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style: Optional[str] = None,
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props: Optional[str] = None) -> None:
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"""Add a new line to the log.
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:param line: the line to add (can contain line breaks)
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:param classes: classes to apply to the line (*added in version 2.18.0*)
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:param style: style to apply to the line (*added in version 2.18.0*)
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:param props: props to apply to the line (*added in version 2.18.0*)
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"""
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for text in str(line).splitlines():
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with self:
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label = Label(text)
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if classes is not None:
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label.classes(replace=classes)
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if style is not None:
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label.style(replace=style)
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if props is not None:
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label.props.clear()
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label.props(props)
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while self.max_lines is not None and len(self.default_slot.children) > self.max_lines:
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self.remove(0)
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