94 lines
3.2 KiB
Python
94 lines
3.2 KiB
Python
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from typing import Optional, Union
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from .color import Color
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from .console import Console, ConsoleOptions, RenderResult
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from .jupyter import JupyterMixin
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from .measure import Measurement
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from .segment import Segment
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from .style import Style
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# There are left-aligned characters for 1/8 to 7/8, but
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# the right-aligned characters exist only for 1/8 and 4/8.
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BEGIN_BLOCK_ELEMENTS = ["█", "█", "█", "▐", "▐", "▐", "▕", "▕"]
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END_BLOCK_ELEMENTS = [" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"]
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FULL_BLOCK = "█"
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class Bar(JupyterMixin):
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"""Renders a solid block bar.
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Args:
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size (float): Value for the end of the bar.
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begin (float): Begin point (between 0 and size, inclusive).
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end (float): End point (between 0 and size, inclusive).
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width (int, optional): Width of the bar, or ``None`` for maximum width. Defaults to None.
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color (Union[Color, str], optional): Color of the bar. Defaults to "default".
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bgcolor (Union[Color, str], optional): Color of bar background. Defaults to "default".
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"""
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def __init__(
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self,
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size: float,
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begin: float,
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end: float,
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*,
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width: Optional[int] = None,
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color: Union[Color, str] = "default",
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bgcolor: Union[Color, str] = "default",
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):
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self.size = size
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self.begin = max(begin, 0)
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self.end = min(end, size)
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self.width = width
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self.style = Style(color=color, bgcolor=bgcolor)
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def __repr__(self) -> str:
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return f"Bar({self.size}, {self.begin}, {self.end})"
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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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width = min(
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self.width if self.width is not None else options.max_width,
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options.max_width,
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)
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if self.begin >= self.end:
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yield Segment(" " * width, self.style)
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yield Segment.line()
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return
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prefix_complete_eights = int(width * 8 * self.begin / self.size)
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prefix_bar_count = prefix_complete_eights // 8
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prefix_eights_count = prefix_complete_eights % 8
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body_complete_eights = int(width * 8 * self.end / self.size)
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body_bar_count = body_complete_eights // 8
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body_eights_count = body_complete_eights % 8
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# When start and end fall into the same cell, we ideally should render
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# a symbol that's "center-aligned", but there is no good symbol in Unicode.
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# In this case, we fall back to right-aligned block symbol for simplicity.
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prefix = " " * prefix_bar_count
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if prefix_eights_count:
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prefix += BEGIN_BLOCK_ELEMENTS[prefix_eights_count]
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body = FULL_BLOCK * body_bar_count
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if body_eights_count:
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body += END_BLOCK_ELEMENTS[body_eights_count]
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suffix = " " * (width - len(body))
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yield Segment(prefix + body[len(prefix) :] + suffix, self.style)
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yield Segment.line()
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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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return (
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Measurement(self.width, self.width)
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if self.width is not None
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else Measurement(4, options.max_width)
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)
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