[+] Separate lightness values for light and dark themes (#533)

[+] Lightness per theme config options

crates/hyfetch/src/bin/hyfetch.rs

@@ -224,7 +224,8 @@ fn main() -> Result<()> {
     } else {
         color_profile.with_lightness_adaptive(
             config
-                .lightness
+                .lightness_per_theme.map(|val| val.get(theme))
+                .or(config.lightness)
                 .unwrap_or_else(|| Config::default_lightness(theme)),
             theme,
         )
@@ -1495,6 +1496,7 @@ fn create_config(
         light_dark: Some(theme),
         auto_detect_light_dark: Some(det_bg.is_some()),
         lightness: Some(lightness),
+        lightness_per_theme: None,
         color_align,
         backend,
         args: None,

crates/hyfetch/src/color_util.rs

@@ -72,6 +72,13 @@ static RGB_COLORS_AC: OnceLock<AhoCorasick> = OnceLock::new();
 #[derive(Copy, Clone, PartialEq, PartialOrd, Debug, Deserialize, Serialize)]
 pub struct Lightness(f32);
 
+/// Represents a dictionary of one lightness option per {light, dark} theme.
+#[derive(Copy, Clone, Debug, Deserialize, Serialize)]
+pub struct LightnessPerTheme {
+    dark: Lightness,
+    light: Lightness,
+}
+
 #[derive(Debug, Error)]
 pub enum LightnessError {
     #[error(
@@ -148,6 +155,15 @@ impl Lightness {
     }
 }
 
+impl LightnessPerTheme {
+    pub fn get(&self, theme: TerminalTheme) -> Lightness {
+        match theme {
+            TerminalTheme::Light => self.light,
+            TerminalTheme::Dark => self.dark
+        }
+    }
+}
+
 impl TryFrom<f32> for Lightness {
     type Error = LightnessError;
 

crates/hyfetch/src/models.rs

@@ -6,6 +6,7 @@ use strum::{AsRefStr, Display, EnumString};
 
 use crate::color_profile::ColorProfile;
 use crate::color_util::Lightness;
+use crate::color_util::LightnessPerTheme;
 use crate::neofetch_util::ColorAlignment;
 use crate::types::{AnsiMode, Backend, TerminalTheme};
 
@@ -16,6 +17,7 @@ pub struct Config {
     pub auto_detect_light_dark: Option<bool>,
     pub light_dark: Option<TerminalTheme>,
     pub lightness: Option<Lightness>,
+    pub lightness_per_theme: Option<LightnessPerTheme>,
     pub color_align: ColorAlignment,
     pub backend: Backend,
     #[serde(default)]