138 lines
4.2 KiB
Python
138 lines
4.2 KiB
Python
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from typing import cast, List, Optional, TYPE_CHECKING, Union
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from ._spinners import SPINNERS
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from .measure import Measurement
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from .table import Table
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from .text import Text
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if TYPE_CHECKING:
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from .console import Console, ConsoleOptions, RenderResult, RenderableType
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from .style import StyleType
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class Spinner:
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"""A spinner animation.
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Args:
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name (str): Name of spinner (run python -m rich.spinner).
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text (RenderableType, optional): A renderable to display at the right of the spinner (str or Text typically). Defaults to "".
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style (StyleType, optional): Style for spinner animation. Defaults to None.
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speed (float, optional): Speed factor for animation. Defaults to 1.0.
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Raises:
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KeyError: If name isn't one of the supported spinner animations.
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"""
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def __init__(
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self,
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name: str,
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text: "RenderableType" = "",
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*,
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style: Optional["StyleType"] = None,
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speed: float = 1.0,
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) -> None:
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try:
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spinner = SPINNERS[name]
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except KeyError:
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raise KeyError(f"no spinner called {name!r}")
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self.text: "Union[RenderableType, Text]" = (
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Text.from_markup(text) if isinstance(text, str) else text
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)
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self.frames = cast(List[str], spinner["frames"])[:]
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self.interval = cast(float, spinner["interval"])
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self.start_time: Optional[float] = None
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self.style = style
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self.speed = speed
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self.frame_no_offset: float = 0.0
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self._update_speed = 0.0
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def __rich_console__(
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self, console: "Console", options: "ConsoleOptions"
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) -> "RenderResult":
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yield self.render(console.get_time())
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def __rich_measure__(
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self, console: "Console", options: "ConsoleOptions"
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) -> Measurement:
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text = self.render(0)
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return Measurement.get(console, options, text)
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def render(self, time: float) -> "RenderableType":
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"""Render the spinner for a given time.
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Args:
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time (float): Time in seconds.
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Returns:
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RenderableType: A renderable containing animation frame.
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"""
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if self.start_time is None:
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self.start_time = time
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frame_no = ((time - self.start_time) * self.speed) / (
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self.interval / 1000.0
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) + self.frame_no_offset
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frame = Text(
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self.frames[int(frame_no) % len(self.frames)], style=self.style or ""
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)
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if self._update_speed:
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self.frame_no_offset = frame_no
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self.start_time = time
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self.speed = self._update_speed
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self._update_speed = 0.0
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if not self.text:
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return frame
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elif isinstance(self.text, (str, Text)):
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return Text.assemble(frame, " ", self.text)
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else:
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table = Table.grid(padding=1)
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table.add_row(frame, self.text)
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return table
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def update(
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self,
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*,
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text: "RenderableType" = "",
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style: Optional["StyleType"] = None,
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speed: Optional[float] = None,
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) -> None:
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"""Updates attributes of a spinner after it has been started.
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Args:
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text (RenderableType, optional): A renderable to display at the right of the spinner (str or Text typically). Defaults to "".
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style (StyleType, optional): Style for spinner animation. Defaults to None.
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speed (float, optional): Speed factor for animation. Defaults to None.
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"""
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if text:
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self.text = Text.from_markup(text) if isinstance(text, str) else text
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if style:
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self.style = style
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if speed:
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self._update_speed = speed
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if __name__ == "__main__": # pragma: no cover
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from time import sleep
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from .columns import Columns
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from .panel import Panel
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from .live import Live
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all_spinners = Columns(
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[
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Spinner(spinner_name, text=Text(repr(spinner_name), style="green"))
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for spinner_name in sorted(SPINNERS.keys())
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],
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column_first=True,
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expand=True,
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)
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with Live(
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Panel(all_spinners, title="Spinners", border_style="blue"),
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refresh_per_second=20,
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) as live:
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while True:
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sleep(0.1)
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