Linux support

Cargo.toml

@@ -9,6 +9,8 @@ description = "Detect if dark mode or light mode is enabled"
 readme = "README.md"
 
 [dependencies]
+detect-desktop-environment = "0.2.0"
+dconf_rs = "0.3.0"
 
 [target.'cfg(windows)'.dependencies]
-winreg = "0.8.0"
+winreg = "0.8.0"

src/lib.rs

@@ -23,7 +23,12 @@ mod windows;
 #[cfg(target_os = "windows")]
 use windows as platform;
 
-#[cfg(not(any(target_os = "macos", target_os = "windows")))]
+#[cfg(target_os = "linux")]
+mod linux;
+#[cfg(target_os = "linux")]
+use linux as platform;
+
+#[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
 mod platform {
     pub fn detect() -> crate::Mode {
         Mode::Light

src/linux.rs

@@ -0,0 +1,51 @@
+use detect_desktop_environment::DesktopEnvironment;
+
+fn is_dark_mode_enabled() -> bool {
+    match DesktopEnvironment::detect() {
+        DesktopEnvironment::Unknown => false,
+        DesktopEnvironment::Cinnamon => check_dconf("/org/cinnamon/desktop/interface/gtk-theme"),
+        DesktopEnvironment::Enlightenment => false,
+        DesktopEnvironment::Gnome => check_dconf("/org/gnome/desktop/interface/gtk-theme"),
+        DesktopEnvironment::Kde => check_file("Name=", "/home/eduardo/.config/kdeglobals"),
+        DesktopEnvironment::Lxde => false,
+        DesktopEnvironment::Lxqt => false,
+        DesktopEnvironment::MacOs => false,
+        DesktopEnvironment::Mate => check_dconf("/org/mate/desktop/interface/gtk-theme"),
+        DesktopEnvironment::Unity => check_dconf("/org/gnome/desktop/interface/gtk-theme"),
+        DesktopEnvironment::Windows => false,
+        DesktopEnvironment::Xfce => check_file("name=\"ThemeName\"", "/home/eduardo/.config/xfce4/xfconf/xfce-perchannel-xml/xsettings.xml")
+    }
+}
+
+fn check_file(pattern: &str, path: &str) -> bool {
+    if let Ok(content) = std::fs::read_to_string(path) {
+        let theme = content.lines().filter(|line| line.contains(pattern)).collect::<String>();
+        if theme.to_lowercase().contains("dark") {
+            true
+        } else {
+            false
+        }
+    } else {
+        false
+    }
+}
+
+fn check_dconf(pattern: &str) -> bool {
+    let theme = match dconf_rs::get_string(pattern) {
+        Ok(theme) => theme,
+        Err(_) => String::new()
+    };
+    if theme.contains("dark") {
+        true
+    } else {
+        false
+    }
+}
+
+pub fn detect() -> crate::Mode {
+    if is_dark_mode_enabled() {
+        crate::Mode::Dark
+    } else {
+        crate::Mode::Light
+    }
+}