Add config, translations, settings UI

src/config.rs

@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+use cosmic::{
+    cosmic_config::{self, cosmic_config_derive::CosmicConfigEntry, CosmicConfigEntry},
+    theme,
+};
+use cosmic_text::Metrics;
+use serde::{Deserialize, Serialize};
+
+pub const CONFIG_VERSION: u64 = 1;
+
+#[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize)]
+pub enum AppTheme {
+    Dark,
+    Light,
+    System,
+}
+
+impl AppTheme {
+    pub fn theme(&self) -> theme::Theme {
+        match self {
+            Self::Dark => theme::Theme::dark(),
+            Self::Light => theme::Theme::light(),
+            Self::System => theme::system_preference(),
+        }
+    }
+}
+
+#[derive(Clone, CosmicConfigEntry, Debug, Deserialize, Eq, PartialEq, Serialize)]
+pub struct Config {
+    pub app_theme: AppTheme,
+    pub font_name: String,
+    pub font_size: u16,
+    pub syntax_theme_dark: String,
+    pub syntax_theme_light: String,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            app_theme: AppTheme::System,
+            font_name: "Fira Mono".to_string(),
+            font_size: 14,
+            syntax_theme_dark: "COSMIC Dark".to_string(),
+            syntax_theme_light: "COSMIC Light".to_string(),
+        }
+    }
+}
+
+impl Config {
+    // Calculate metrics from font size
+    pub fn metrics(&self) -> Metrics {
+        let font_size = self.font_size.max(1) as f32;
+        let line_height = (font_size * 1.4).ceil();
+        Metrics::new(font_size, line_height)
+    }
+
+    // Get current syntax theme based on dark mode
+    pub fn syntax_theme(&self) -> &str {
+        let dark = self.app_theme.theme().theme_type.is_dark();
+        if dark {
+            &self.syntax_theme_dark
+        } else {
+            &self.syntax_theme_light
+        }
+    }
+}