45 lines
1.4 KiB
Rust
45 lines
1.4 KiB
Rust
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use crate::color::blend;
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use crate::color::is_light;
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use crate::color::perceptual_distance;
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use crate::terminal_palette::terminal_palette;
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use ratatui::style::Color;
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use ratatui::style::Style;
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/// Returns the style for a user-authored message using the provided terminal background.
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pub fn user_message_style(terminal_bg: Option<(u8, u8, u8)>) -> Style {
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match terminal_bg {
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Some(bg) => Style::default().bg(user_message_bg(bg)),
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None => Style::default(),
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}
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}
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#[allow(clippy::disallowed_methods)]
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pub fn user_message_bg(terminal_bg: (u8, u8, u8)) -> Color {
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let top = if is_light(terminal_bg) {
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(0, 0, 0)
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} else {
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(255, 255, 255)
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};
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let bottom = terminal_bg;
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let Some(color_level) = supports_color::on_cached(supports_color::Stream::Stdout) else {
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return Color::default();
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};
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let target = blend(top, bottom, 0.1);
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if color_level.has_16m {
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let (r, g, b) = target;
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Color::Rgb(r, g, b)
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} else if color_level.has_256
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&& let Some(palette) = terminal_palette()
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&& let Some((i, _)) = palette.into_iter().enumerate().min_by(|(_, a), (_, b)| {
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perceptual_distance(*a, target)
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.partial_cmp(&perceptual_distance(*b, target))
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.unwrap_or(std::cmp::Ordering::Equal)
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})
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{
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Color::Indexed(i as u8)
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} else {
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Color::default()
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}
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}
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