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|
use serde::Deserialize;
use tracing::warn;
/// Theme configuration: pick a built-in or override individual tokens.
///
/// ```toml
/// [theme]
/// name = "tokyo-night" # built-in: catppuccin, terminal, dracula, nord, etc.
///
/// [theme.custom] # override individual tokens on top of the base
/// accent = "#f5c2e7"
/// red = "#ff6188"
/// ```
#[derive(Debug, Clone, Default, Deserialize)]
#[serde(default)]
pub struct ThemeConfig {
/// Built-in theme name. Default: "catppuccin".
pub name: Option<String>,
/// Follow host terminal light/dark appearance and switch between theme names.
pub auto_switch: bool,
/// Theme name used when `auto_switch` selects a dark appearance.
pub dark_name: Option<String>,
/// Theme name used when `auto_switch` selects a light appearance.
pub light_name: Option<String>,
/// Custom overrides — applied on top of the selected base theme.
pub custom: Option<CustomThemeColors>,
}
/// Per-token color overrides. All fields optional — only set what you want to change.
#[derive(Debug, Clone, Default, Deserialize)]
#[serde(default)]
pub struct CustomThemeColors {
pub accent: Option<String>,
pub panel_bg: Option<String>,
pub surface0: Option<String>,
pub surface1: Option<String>,
pub surface_dim: Option<String>,
pub overlay0: Option<String>,
pub overlay1: Option<String>,
pub text: Option<String>,
pub subtext0: Option<String>,
pub mauve: Option<String>,
pub green: Option<String>,
pub yellow: Option<String>,
pub red: Option<String>,
pub blue: Option<String>,
pub teal: Option<String>,
pub peach: Option<String>,
}
/// Parse a color string into a ratatui Color.
/// Supports: hex (#rrggbb, #rgb), named colors, rgb(r,g,b), and reset aliases.
pub fn parse_color(s: &str) -> ratatui::style::Color {
use ratatui::style::Color;
let s = s.trim().to_lowercase();
match s.as_str() {
"reset" | "default" | "none" | "transparent" => return Color::Reset,
_ => {}
}
if let Some(hex) = s.strip_prefix('#') {
if hex.len() == 6 {
if let (Ok(r), Ok(g), Ok(b)) = (
u8::from_str_radix(&hex[0..2], 16),
u8::from_str_radix(&hex[2..4], 16),
u8::from_str_radix(&hex[4..6], 16),
) {
return Color::Rgb(r, g, b);
}
} else if hex.len() == 3 {
let chars: Vec<u8> = hex
.chars()
.filter_map(|c| u8::from_str_radix(&c.to_string(), 16).ok())
.collect();
if chars.len() == 3 {
return Color::Rgb(chars[0] * 17, chars[1] * 17, chars[2] * 17);
}
}
}
if let Some(inner) = s.strip_prefix("rgb(").and_then(|s| s.strip_suffix(')')) {
let parts: Vec<&str> = inner.split(',').collect();
if parts.len() == 3 {
if let (Ok(r), Ok(g), Ok(b)) = (
parts[0].trim().parse::<u8>(),
parts[1].trim().parse::<u8>(),
parts[2].trim().parse::<u8>(),
) {
return Color::Rgb(r, g, b);
}
}
}
match s.as_str() {
"black" => Color::Black,
"red" => Color::Red,
"green" => Color::Green,
"yellow" => Color::Yellow,
"blue" => Color::Blue,
"magenta" | "purple" => Color::Magenta,
"cyan" => Color::Cyan,
"white" => Color::White,
"gray" | "grey" => Color::Gray,
"darkgray" | "darkgrey" => Color::DarkGray,
"lightred" => Color::LightRed,
"lightgreen" => Color::LightGreen,
"lightyellow" => Color::LightYellow,
"lightblue" => Color::LightBlue,
"lightmagenta" => Color::LightMagenta,
"lightcyan" => Color::LightCyan,
_ => {
warn!(color = s, "unknown color, defaulting to cyan");
Color::Cyan
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::config::Config;
#[test]
fn theme_name_parses() {
let toml = r#"
[theme]
name = "dracula"
"#;
let config: Config = toml::from_str(toml).unwrap();
assert_eq!(config.theme.name.as_deref(), Some("dracula"));
}
#[test]
fn parse_color_accepts_reset_aliases() {
use ratatui::style::Color;
for value in ["reset", "default", "none", "transparent"] {
assert_eq!(parse_color(value), Color::Reset, "value: {value}");
}
}
#[test]
fn theme_auto_switch_fields_parse() {
let toml = r#"
[theme]
name = "catppuccin"
auto_switch = true
dark_name = "tokyo-night"
light_name = "catppuccin-latte"
"#;
let config: Config = toml::from_str(toml).unwrap();
assert_eq!(config.theme.name.as_deref(), Some("catppuccin"));
assert!(config.theme.auto_switch);
assert_eq!(config.theme.dark_name.as_deref(), Some("tokyo-night"));
assert_eq!(config.theme.light_name.as_deref(), Some("catppuccin-latte"));
}
#[test]
fn theme_custom_overrides_parse() {
let toml = r##"
[theme]
name = "nord"
[theme.custom]
panel_bg = "#1e1e2e"
accent = "#ff79c6"
red = "rgb(255, 85, 85)"
"##;
let config: Config = toml::from_str(toml).unwrap();
assert_eq!(config.theme.name.as_deref(), Some("nord"));
let custom = config.theme.custom.as_ref().unwrap();
assert_eq!(custom.panel_bg.as_deref(), Some("#1e1e2e"));
assert_eq!(custom.accent.as_deref(), Some("#ff79c6"));
assert_eq!(custom.red.as_deref(), Some("rgb(255, 85, 85)"));
assert!(custom.green.is_none());
}
#[test]
fn theme_defaults_when_missing() {
let config: Config = toml::from_str("").unwrap();
assert!(config.theme.name.is_none());
assert!(!config.theme.auto_switch);
assert!(config.theme.dark_name.is_none());
assert!(config.theme.light_name.is_none());
assert!(config.theme.custom.is_none());
}
}
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