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from typing import cast, List, Optional, Tuple, TYPE_CHECKING, Union
if TYPE_CHECKING:
from .console import (
Console,
ConsoleOptions,
RenderableType,
RenderResult,
)
from .jupyter import JupyterMixin
from .measure import Measurement
from .style import Style
from .segment import Segment
PaddingDimensions = Union[int, Tuple[int], Tuple[int, int], Tuple[int, int, int, int]]
class Padding(JupyterMixin):
"""Draw space around content.
Example:
>>> print(Padding("Hello", (2, 4), style="on blue"))
Args:
renderable (RenderableType): String or other renderable.
pad (Union[int, Tuple[int]]): Padding for top, right, bottom, and left borders.
May be specified with 1, 2, or 4 integers (CSS style).
style (Union[str, Style], optional): Style for padding characters. Defaults to "none".
expand (bool, optional): Expand padding to fit available width. Defaults to True.
"""
def __init__(
self,
renderable: "RenderableType",
pad: "PaddingDimensions" = (0, 0, 0, 0),
*,
style: Union[str, Style] = "none",
expand: bool = True,
):
self.renderable = renderable
self.top, self.right, self.bottom, self.left = self.unpack(pad)
self.style = style
self.expand = expand
@classmethod
def indent(cls, renderable: "RenderableType", level: int) -> "Padding":
"""Make padding instance to render an indent.
Args:
renderable (RenderableType): String or other renderable.
level (int): Number of characters to indent.
Returns:
Padding: A Padding instance.
"""
return Padding(renderable, pad=(0, 0, 0, level), expand=False)
@staticmethod
def unpack(pad: "PaddingDimensions") -> Tuple[int, int, int, int]:
"""Unpack padding specified in CSS style."""
if isinstance(pad, int):
return (pad, pad, pad, pad)
if len(pad) == 1:
_pad = pad[0]
return (_pad, _pad, _pad, _pad)
if len(pad) == 2:
pad_top, pad_right = cast(Tuple[int, int], pad)
return (pad_top, pad_right, pad_top, pad_right)
if len(pad) == 4:
top, right, bottom, left = cast(Tuple[int, int, int, int], pad)
return (top, right, bottom, left)
raise ValueError(f"1, 2 or 4 integers required for padding; {len(pad)} given")
def __repr__(self) -> str:
return f"Padding({self.renderable!r}, ({self.top},{self.right},{self.bottom},{self.left}))"
def __rich_console__(
self, console: "Console", options: "ConsoleOptions"
) -> "RenderResult":
style = console.get_style(self.style)
if self.expand:
width = options.max_width
else:
width = min(
Measurement.get(console, options, self.renderable).maximum
+ self.left
+ self.right,
options.max_width,
)
render_options = options.update_width(width - self.left - self.right)
if render_options.height is not None:
render_options = render_options.update_height(
height=render_options.height - self.top - self.bottom
)
lines = console.render_lines(
self.renderable, render_options, style=style, pad=True
)
_Segment = Segment
left = _Segment(" " * self.left, style) if self.left else None
right = (
[_Segment(f'{" " * self.right}', style), _Segment.line()]
if self.right
else [_Segment.line()]
)
blank_line: Optional[List[Segment]] = None
if self.top:
blank_line = [_Segment(f'{" " * width}\n', style)]
yield from blank_line * self.top
if left:
for line in lines:
yield left
yield from line
yield from right
else:
for line in lines:
yield from line
yield from right
if self.bottom:
blank_line = blank_line or [_Segment(f'{" " * width}\n', style)]
yield from blank_line * self.bottom
def __rich_measure__(
self, console: "Console", options: "ConsoleOptions"
) -> "Measurement":
max_width = options.max_width
extra_width = self.left + self.right
if max_width - extra_width < 1:
return Measurement(max_width, max_width)
measure_min, measure_max = Measurement.get(console, options, self.renderable)
measurement = Measurement(measure_min + extra_width, measure_max + extra_width)
measurement = measurement.with_maximum(max_width)
return measurement
if __name__ == "__main__": # pragma: no cover
from pip._vendor.rich import print
print(Padding("Hello, World", (2, 4), style="on blue"))