Add dark mode

cmd/WiiUDownloader/darkMode.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"os/exec"
+	"runtime"
+	"strings"
+)
+
+func isDarkMode() bool {
+	switch runtime.GOOS {
+	case "darwin":
+		cmd := exec.Command("defaults", "read", "-g", "AppleInterfaceStyle")
+		output, err := cmd.Output()
+		if err == nil && strings.TrimSpace(string(output)) == "Dark" {
+			return true
+		}
+
+	case "windows":
+		cmd := exec.Command("reg", "query", "HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize", "/v", "AppsUseLightTheme")
+		output, err := cmd.Output()
+		if err == nil && strings.Contains(string(output), "REG_DWORD") && strings.Contains(string(output), "0x0") {
+			return true
+		}
+
+	case "linux":
+		cmd := exec.Command("gsettings", "get", "org.gnome.desktop.interface", "gtk-theme")
+		output, err := cmd.Output()
+		if err == nil && strings.TrimSpace(string(output)) == "'Adwaita-dark'" {
+			return true
+		}
+	}
+
+	return false
+}

cmd/WiiUDownloader/mainwindow.go

@@ -43,6 +43,12 @@ type MainWindow struct {
 func NewMainWindow(entries []wiiudownloader.TitleEntry, logger *wiiudownloader.Logger) *MainWindow {
 	gtk.Init(nil)
 
+	gSettings, err := gtk.SettingsGetDefault()
+	if err != nil {
+		logger.Error(err.Error())
+	}
+	gSettings.SetProperty("gtk-application-prefer-dark-theme", isDarkMode())
+
 	win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
 	if err != nil {
 		logger.Fatal("Unable to create window:", err)