File size: 1,559 Bytes
5b76e0f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | from typing import Iterable
from rich.segment import Segment
from rich.style import Style
from textual.color import Color
def _apply_opacity(
segments: Iterable[Segment],
base_background: Color,
opacity: float,
) -> Iterable[Segment]:
"""Takes an iterable of foreground Segments and blends them into the supplied
background color, yielding copies of the Segments with blended foreground and
background colors applied.
Args:
segments (Iterable[Segment]): The segments in the foreground.
base_background (Color): The background color to blend foreground into.
opacity (float): The blending factor. A value of 1.0 means output segments will
have identical foreground and background colors to input segments.
"""
_Segment = Segment
from_rich_color = Color.from_rich_color
from_color = Style.from_color
blend = base_background.blend
for segment in segments:
text, style, _ = segment
if not style:
yield segment
continue
blended_style = style
if style.color:
color = from_rich_color(style.color)
blended_foreground = blend(color, factor=opacity)
blended_style += from_color(color=blended_foreground.rich_color)
if style.bgcolor:
bgcolor = from_rich_color(style.bgcolor)
blended_background = blend(bgcolor, factor=opacity)
blended_style += from_color(bgcolor=blended_background.rich_color)
yield _Segment(text, blended_style)
|