--- a/src/sys/glib/dark_theme.cc	Sun Jul 14 19:12:40 2024 -0400
+++ b/src/sys/glib/dark_theme.cc	Sun Jul 14 23:23:56 2024 -0400
@@ -5,6 +5,7 @@
 #include <string_view>
 #include <memory>
 #include <array>
+#include <iostream>
 
 namespace glib {
 
@@ -33,6 +34,29 @@
 template<typename T>
 using GMallocPtr = std::unique_ptr<T, g_malloc_del<T>>;
 
+/* not really "glib" but GNOME-related enough */
+bool IsGTKThemeDark(const std::string_view str) {
+	/* if that doesn't exist, use the GTK theme and check for some known
+	 * suffixes. if one is found, return
+	 *
+	 * XXX probably better to use case folding here */
+	static constexpr std::array<std::string_view, 3> suffixes = {
+		"-dark",   /* Adwaita-dark */
+		"-Dark",   /* Arc-Dark */
+		"-Darker", /* Arc-Darker */
+	};
+
+	for (const auto& suffix : suffixes) {
+		if (str.size() < suffix.size())
+			continue;
+
+		if (std::equal(str.data() + str.size() - suffix.length(), str.data() + str.size(), suffix.begin(), suffix.end()))
+			return true;
+	}
+
+	return false;
+}
+
 bool IsInDarkTheme() {
 	GObjectPtr<GSettings> settings(::g_settings_new("org.gnome.desktop.interface"));
 	if (!settings)
@@ -50,22 +74,13 @@
 		if (!str)
 			return false;
 
-		bool success = !std::strncmp(str, size, "prefer-dark");
+		bool success = !std::strncmp(str, "prefer-dark", size);
 
 		if (success)
 			return true;
 	}
 
 	{
-		/* if that doesn't exist, use the GTK theme and check for some known
-		 * suffixes. if one is found, return
-		 *
-		 * XXX probably better to use case folding here */
-		static constexpr std::array<std::string_view, 3> suffixes = {
-			"-dark",   /* Adwaita-dark */
-			"-Dark",   /* Arc-Dark */
-			"-Darker", /* Arc-Darker */
-		};
 
 		GVariantPtr<GVariant> gtk_theme(::g_settings_get_value(settings.get(), "gtk-theme"));
 		if (!gtk_theme)
@@ -76,13 +91,8 @@
 		if (!str)
 			return false;
 
-		for (const auto& suffix : suffixes) {
-			if (size < suffix.size())
-				continue;
-
-			if (std::equal(str + size - suffix.length(), str + size, suffix.begin(), suffix.end()))
-				return true;
-		}
+		if (IsGTKThemeDark({str, size}))
+			return true;
 	}
 
 	/* welp, we tried */