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constrain.py
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from typing import Optional, TYPE_CHECKING from .jupyter import JupyterMixin from .measure import Measurement if TYPE_CHECKING: from .console import Console, ConsoleOptions, RenderableType, RenderResult class Constrain(JupyterMixin): """Constrain the width of a renderable to a given number of characters. Args: renderable (RenderableType): A renderable object. width (int, optional): The maximum width (in characters) to render. Defaults to 80. """ def __init__(self, renderable: "RenderableType", width: Optional[int] = 80) -> None: self.renderable = renderable self.width = width def __rich_console__( self, console: "Console", options: "ConsoleOptions" ) -> "RenderResult": if self.width is None: yield self.renderable else: child_options = options.update_width(min(self.width, options.max_width)) yield from console.render(self.renderable, child_options) def __rich_measure__( self, console: "Console", options: "ConsoleOptions" ) -> "Measurement": if self.width is not None: options = options.update_width(self.width) measurement = Measurement.get(console, options, self.renderable) return measurement