You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
225 lines
8.0 KiB
Python
225 lines
8.0 KiB
Python
![]()
2 months ago
|
import math
|
||
|
from functools import lru_cache
|
||
|
from time import monotonic
|
||
|
from typing import Iterable, List, Optional
|
||
|
|
||
|
from .color import Color, blend_rgb
|
||
|
from .color_triplet import ColorTriplet
|
||
|
from .console import Console, ConsoleOptions, RenderResult
|
||
|
from .jupyter import JupyterMixin
|
||
|
from .measure import Measurement
|
||
|
from .segment import Segment
|
||
|
from .style import Style, StyleType
|
||
|
|
||
|
# Number of characters before 'pulse' animation repeats
|
||
|
PULSE_SIZE = 20
|
||
|
|
||
|
|
||
|
class ProgressBar(JupyterMixin):
|
||
|
"""Renders a (progress) bar. Used by rich.progress.
|
||
|
|
||
|
Args:
|
||
|
total (float, optional): Number of steps in the bar. Defaults to 100. Set to None to render a pulsing animation.
|
||
|
completed (float, optional): Number of steps completed. Defaults to 0.
|
||
|
width (int, optional): Width of the bar, or ``None`` for maximum width. Defaults to None.
|
||
|
pulse (bool, optional): Enable pulse effect. Defaults to False. Will pulse if a None total was passed.
|
||
|
style (StyleType, optional): Style for the bar background. Defaults to "bar.back".
|
||
|
complete_style (StyleType, optional): Style for the completed bar. Defaults to "bar.complete".
|
||
|
finished_style (StyleType, optional): Style for a finished bar. Defaults to "bar.finished".
|
||
|
pulse_style (StyleType, optional): Style for pulsing bars. Defaults to "bar.pulse".
|
||
|
animation_time (Optional[float], optional): Time in seconds to use for animation, or None to use system time.
|
||
|
"""
|
||
|
|
||
|
def __init__(
|
||
|
self,
|
||
|
total: Optional[float] = 100.0,
|
||
|
completed: float = 0,
|
||
|
width: Optional[int] = None,
|
||
|
pulse: bool = False,
|
||
|
style: StyleType = "bar.back",
|
||
|
complete_style: StyleType = "bar.complete",
|
||
|
finished_style: StyleType = "bar.finished",
|
||
|
pulse_style: StyleType = "bar.pulse",
|
||
|
animation_time: Optional[float] = None,
|
||
|
):
|
||
|
self.total = total
|
||
|
self.completed = completed
|
||
|
self.width = width
|
||
|
self.pulse = pulse
|
||
|
self.style = style
|
||
|
self.complete_style = complete_style
|
||
|
self.finished_style = finished_style
|
||
|
self.pulse_style = pulse_style
|
||
|
self.animation_time = animation_time
|
||
|
|
||
|
self._pulse_segments: Optional[List[Segment]] = None
|
||
|
|
||
|
def __repr__(self) -> str:
|
||
|
return f"<Bar {self.completed!r} of {self.total!r}>"
|
||
|
|
||
|
@property
|
||
|
def percentage_completed(self) -> Optional[float]:
|
||
|
"""Calculate percentage complete."""
|
||
|
if self.total is None:
|
||
|
return None
|
||
|
completed = (self.completed / self.total) * 100.0
|
||
|
completed = min(100, max(0.0, completed))
|
||
|
return completed
|
||
|
|
||
|
@lru_cache(maxsize=16)
|
||
|
def _get_pulse_segments(
|
||
|
self,
|
||
|
fore_style: Style,
|
||
|
back_style: Style,
|
||
|
color_system: str,
|
||
|
no_color: bool,
|
||
|
ascii: bool = False,
|
||
|
) -> List[Segment]:
|
||
|
"""Get a list of segments to render a pulse animation.
|
||
|
|
||
|
Returns:
|
||
|
List[Segment]: A list of segments, one segment per character.
|
||
|
"""
|
||
|
bar = "-" if ascii else "━"
|
||
|
segments: List[Segment] = []
|
||
|
if color_system not in ("standard", "eight_bit", "truecolor") or no_color:
|
||
|
segments += [Segment(bar, fore_style)] * (PULSE_SIZE // 2)
|
||
|
segments += [Segment(" " if no_color else bar, back_style)] * (
|
||
|
PULSE_SIZE - (PULSE_SIZE // 2)
|
||
|
)
|
||
|
return segments
|
||
|
|
||
|
append = segments.append
|
||
|
fore_color = (
|
||
|
fore_style.color.get_truecolor()
|
||
|
if fore_style.color
|
||
|
else ColorTriplet(255, 0, 255)
|
||
|
)
|
||
|
back_color = (
|
||
|
back_style.color.get_truecolor()
|
||
|
if back_style.color
|
||
|
else ColorTriplet(0, 0, 0)
|
||
|
)
|
||
|
cos = math.cos
|
||
|
pi = math.pi
|
||
|
_Segment = Segment
|
||
|
_Style = Style
|
||
|
from_triplet = Color.from_triplet
|
||
|
|
||
|
for index in range(PULSE_SIZE):
|
||
|
position = index / PULSE_SIZE
|
||
|
fade = 0.5 + cos((position * pi * 2)) / 2.0
|
||
|
color = blend_rgb(fore_color, back_color, cross_fade=fade)
|
||
|
append(_Segment(bar, _Style(color=from_triplet(color))))
|
||
|
return segments
|
||
|
|
||
|
def update(self, completed: float, total: Optional[float] = None) -> None:
|
||
|
"""Update progress with new values.
|
||
|
|
||
|
Args:
|
||
|
completed (float): Number of steps completed.
|
||
|
total (float, optional): Total number of steps, or ``None`` to not change. Defaults to None.
|
||
|
"""
|
||
|
self.completed = completed
|
||
|
self.total = total if total is not None else self.total
|
||
|
|
||
|
def _render_pulse(
|
||
|
self, console: Console, width: int, ascii: bool = False
|
||
|
) -> Iterable[Segment]:
|
||
|
"""Renders the pulse animation.
|
||
|
|
||
|
Args:
|
||
|
console (Console): Console instance.
|
||
|
width (int): Width in characters of pulse animation.
|
||
|
|
||
|
Returns:
|
||
|
RenderResult: [description]
|
||
|
|
||
|
Yields:
|
||
|
Iterator[Segment]: Segments to render pulse
|
||
|
"""
|
||
|
fore_style = console.get_style(self.pulse_style, default="white")
|
||
|
back_style = console.get_style(self.style, default="black")
|
||
|
|
||
|
pulse_segments = self._get_pulse_segments(
|
||
|
fore_style, back_style, console.color_system, console.no_color, ascii=ascii
|
||
|
)
|
||
|
segment_count = len(pulse_segments)
|
||
|
current_time = (
|
||
|
monotonic() if self.animation_time is None else self.animation_time
|
||
|
)
|
||
|
segments = pulse_segments * (int(width / segment_count) + 2)
|
||
|
offset = int(-current_time * 15) % segment_count
|
||
|
segments = segments[offset : offset + width]
|
||
|
yield from segments
|
||
|
|
||
|
def __rich_console__(
|
||
|
self, console: Console, options: ConsoleOptions
|
||
|
) -> RenderResult:
|
||
|
|
||
|
width = min(self.width or options.max_width, options.max_width)
|
||
|
ascii = options.legacy_windows or options.ascii_only
|
||
|
should_pulse = self.pulse or self.total is None
|
||
|
if should_pulse:
|
||
|
yield from self._render_pulse(console, width, ascii=ascii)
|
||
|
return
|
||
|
|
||
|
completed: Optional[float] = (
|
||
|
min(self.total, max(0, self.completed)) if self.total is not None else None
|
||
|
)
|
||
|
|
||
|
bar = "-" if ascii else "━"
|
||
|
half_bar_right = " " if ascii else "╸"
|
||
|
half_bar_left = " " if ascii else "╺"
|
||
|
complete_halves = (
|
||
|
int(width * 2 * completed / self.total)
|
||
|
if self.total and completed is not None
|
||
|
else width * 2
|
||
|
)
|
||
|
bar_count = complete_halves // 2
|
||
|
half_bar_count = complete_halves % 2
|
||
|
style = console.get_style(self.style)
|
||
|
is_finished = self.total is None or self.completed >= self.total
|
||
|
complete_style = console.get_style(
|
||
|
self.finished_style if is_finished else self.complete_style
|
||
|
)
|
||
|
_Segment = Segment
|
||
|
if bar_count:
|
||
|
yield _Segment(bar * bar_count, complete_style)
|
||
|
if half_bar_count:
|
||
|
yield _Segment(half_bar_right * half_bar_count, complete_style)
|
||
|
|
||
|
if not console.no_color:
|
||
|
remaining_bars = width - bar_count - half_bar_count
|
||
|
if remaining_bars and console.color_system is not None:
|
||
|
if not half_bar_count and bar_count:
|
||
|
yield _Segment(half_bar_left, style)
|
||
|
remaining_bars -= 1
|
||
|
if remaining_bars:
|
||
|
yield _Segment(bar * remaining_bars, style)
|
||
|
|
||
|
def __rich_measure__(
|
||
|
self, console: Console, options: ConsoleOptions
|
||
|
) -> Measurement:
|
||
|
return (
|
||
|
Measurement(self.width, self.width)
|
||
|
if self.width is not None
|
||
|
else Measurement(4, options.max_width)
|
||
|
)
|
||
|
|
||
|
|
||
|
if __name__ == "__main__": # pragma: no cover
|
||
|
console = Console()
|
||
|
bar = ProgressBar(width=50, total=100)
|
||
|
|
||
|
import time
|
||
|
|
||
|
console.show_cursor(False)
|
||
|
for n in range(0, 101, 1):
|
||
|
bar.update(n)
|
||
|
console.print(bar)
|
||
|
console.file.write("\r")
|
||
|
time.sleep(0.05)
|
||
|
console.show_cursor(True)
|
||
|
console.print()
|