99 lines
2.9 KiB
Python
99 lines
2.9 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING, Iterable
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from rich.console import Console, ConsoleOptions, RenderResult
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from rich.segment import Segment
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from rich.style import Style
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from textual.color import Color
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if TYPE_CHECKING:
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from textual.screen import Screen
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class BackgroundScreen:
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"""Tints a renderable and removes links / meta."""
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def __init__(
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self,
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screen: Screen,
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color: Color,
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) -> None:
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"""Initialize a BackgroundScreen instance.
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Args:
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screen: A Screen instance.
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color: A color (presumably with alpha).
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"""
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self.screen = screen
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"""Screen to process."""
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self.color = color
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"""Color to apply (should have alpha)."""
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@classmethod
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def process_segments(
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cls, segments: Iterable[Segment], color: Color
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) -> Iterable[Segment]:
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"""Apply tint to segments and remove meta + styles
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Args:
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segments: Incoming segments.
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color: Color of tint.
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Returns:
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Segments with applied tint.
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"""
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from_rich_color = Color.from_rich_color
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style_from_color = Style.from_color
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_Segment = Segment
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NULL_STYLE = Style()
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if color.a == 0:
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# Special case for transparent color
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for segment in segments:
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text, style, control = segment
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if control:
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yield segment
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else:
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yield _Segment(
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text,
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NULL_STYLE if style is None else style.clear_meta_and_links(),
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control,
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)
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return
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for segment in segments:
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text, style, control = segment
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if control:
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yield segment
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else:
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style = NULL_STYLE if style is None else style.clear_meta_and_links()
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yield _Segment(
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text,
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(
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style
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+ style_from_color(
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(
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(from_rich_color(style.color) + color).rich_color
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if style.color is not None
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else None
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),
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(
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(from_rich_color(style.bgcolor) + color).rich_color
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if style.bgcolor is not None
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else None
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),
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)
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),
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control,
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)
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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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segments = console.render(self.screen._compositor, options)
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color = self.color
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return self.process_segments(segments, color)
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