| 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) |
|
|
