feat: add k-launcher-config crate for configuration management and integrate with existing components

crates/k-launcher-config/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "k-launcher-config"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+name = "k_launcher_config"
+path = "src/lib.rs"
+
+[dependencies]
+dirs = { workspace = true }
+serde = { workspace = true }
+toml = { workspace = true }

crates/k-launcher-config/src/lib.rs

@@ -0,0 +1,193 @@
+use serde::Deserialize;
+
+// RGBA: [r, g, b, a] where r/g/b are 0–255 as f32, a is 0.0–1.0
+pub type Rgba = [f32; 4];
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(default)]
+pub struct Config {
+    pub window: WindowCfg,
+    pub appearance: AppearanceCfg,
+    pub search: SearchCfg,
+    pub plugins: PluginsCfg,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            window: WindowCfg::default(),
+            appearance: AppearanceCfg::default(),
+            search: SearchCfg::default(),
+            plugins: PluginsCfg::default(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(default)]
+pub struct WindowCfg {
+    pub width: f32,
+    pub height: f32,
+    pub decorations: bool,
+    pub transparent: bool,
+    pub resizable: bool,
+}
+
+impl Default for WindowCfg {
+    fn default() -> Self {
+        Self {
+            width: 600.0,
+            height: 400.0,
+            decorations: false,
+            transparent: true,
+            resizable: false,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(default)]
+pub struct AppearanceCfg {
+    pub background_rgba: Rgba,
+    pub border_rgba: Rgba,
+    pub border_width: f32,
+    pub border_radius: f32,
+    pub search_font_size: f32,
+    pub title_size: f32,
+    pub desc_size: f32,
+    pub row_radius: f32,
+    pub placeholder: String,
+}
+
+impl Default for AppearanceCfg {
+    fn default() -> Self {
+        Self {
+            background_rgba: [20.0, 20.0, 30.0, 0.9],
+            border_rgba: [0.0, 183.0, 235.0, 1.0],
+            border_width: 1.0,
+            border_radius: 8.0,
+            search_font_size: 18.0,
+            title_size: 15.0,
+            desc_size: 12.0,
+            row_radius: 4.0,
+            placeholder: "Search...".to_string(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(default)]
+pub struct SearchCfg {
+    pub max_results: usize,
+}
+
+impl Default for SearchCfg {
+    fn default() -> Self {
+        Self { max_results: 8 }
+    }
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(default)]
+pub struct PluginsCfg {
+    pub calc: bool,
+    pub cmd: bool,
+    pub files: bool,
+    pub apps: bool,
+}
+
+impl Default for PluginsCfg {
+    fn default() -> Self {
+        Self {
+            calc: true,
+            cmd: true,
+            files: true,
+            apps: true,
+        }
+    }
+}
+
+pub fn load() -> Config {
+    let path = dirs::config_dir()
+        .map(|d| d.join("k-launcher").join("config.toml"));
+    let Some(path) = path else {
+        return Config::default();
+    };
+    let Ok(content) = std::fs::read_to_string(&path) else {
+        return Config::default();
+    };
+    toml::from_str(&content).unwrap_or_default()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn default_config_has_sane_values() {
+        let cfg = Config::default();
+        assert_eq!(cfg.search.max_results, 8);
+        assert_eq!(cfg.window.width, 600.0);
+        assert_eq!(cfg.window.height, 400.0);
+        assert!(!cfg.window.decorations);
+        assert!(cfg.window.transparent);
+        assert!(!cfg.window.resizable);
+        assert!(cfg.plugins.calc);
+        assert!(cfg.plugins.apps);
+        assert_eq!(cfg.appearance.search_font_size, 18.0);
+        assert_eq!(cfg.appearance.placeholder, "Search...");
+    }
+
+    #[test]
+    fn parse_partial_toml_uses_defaults() {
+        let toml = "[search]\nmax_results = 5\n";
+        let cfg: Config = toml::from_str(toml).unwrap();
+        assert_eq!(cfg.search.max_results, 5);
+        assert_eq!(cfg.window.width, 600.0);
+        assert_eq!(cfg.appearance.search_font_size, 18.0);
+        assert!(cfg.plugins.apps);
+    }
+
+    #[test]
+    fn parse_full_toml_roundtrip() {
+        let toml = r#"
+[window]
+width = 800.0
+height = 500.0
+decorations = true
+transparent = false
+resizable = true
+
+[appearance]
+background_rgba = [10.0, 10.0, 20.0, 0.8]
+border_rgba = [100.0, 200.0, 255.0, 1.0]
+border_width = 2.0
+border_radius = 12.0
+search_font_size = 20.0
+title_size = 16.0
+desc_size = 13.0
+row_radius = 6.0
+placeholder = "Type here..."
+
+[search]
+max_results = 12
+
+[plugins]
+calc = false
+cmd = true
+files = false
+apps = true
+"#;
+        let cfg: Config = toml::from_str(toml).unwrap();
+        assert_eq!(cfg.window.width, 800.0);
+        assert_eq!(cfg.window.height, 500.0);
+        assert!(cfg.window.decorations);
+        assert!(!cfg.window.transparent);
+        assert_eq!(cfg.appearance.background_rgba, [10.0, 10.0, 20.0, 0.8]);
+        assert_eq!(cfg.appearance.search_font_size, 20.0);
+        assert_eq!(cfg.appearance.placeholder, "Type here...");
+        assert_eq!(cfg.search.max_results, 12);
+        assert!(!cfg.plugins.calc);
+        assert!(!cfg.plugins.files);
+    }
+}