From 6c9b9dc7e2308b048cc5709d27a030eb8839ee06 Mon Sep 17 00:00:00 2001
From: Drew Weymouth <dweymouth@gmail.com>
Date: Mon, 19 Aug 2024 08:01:58 -0700
Subject: [PATCH] undo temp fix for Linux color scheme

---
 app/app_xdg.go | 46 ++++++++++++++--------------------------------
 1 file changed, 14 insertions(+), 32 deletions(-)

diff --git a/app/app_xdg.go b/app/app_xdg.go
index 33780e5ec8..28a4593798 100644
--- a/app/app_xdg.go
+++ b/app/app_xdg.go
@@ -13,6 +13,7 @@ import (
 	"github.com/rymdport/portal/notification"
 	"github.com/rymdport/portal/openuri"
 	portalSettings "github.com/rymdport/portal/settings"
+	"github.com/rymdport/portal/settings/appearance"
 
 	"fyne.io/fyne/v2"
 	internalapp "fyne.io/fyne/v2/internal/app"
@@ -36,43 +37,24 @@ func (a *fyneApp) OpenURL(url *url.URL) error {
 
 // fetch color variant from dbus portal desktop settings.
 func findFreedesktopColorScheme() fyne.ThemeVariant {
-	dbusConn, err := dbus.SessionBus()
+	colorScheme, err := appearance.GetColorScheme()
 	if err != nil {
-		fyne.LogError("Unable to connect to session D-Bus", err)
-		return theme.VariantDark
-	}
-
-	dbusObj := dbusConn.Object("org.freedesktop.portal.Desktop", "/org/freedesktop/portal/desktop")
-	call := dbusObj.Call(
-		"org.freedesktop.portal.Settings.Read",
-		dbus.FlagNoAutoStart,
-		"org.freedesktop.appearance",
-		"color-scheme",
-	)
-	if call.Err != nil {
-		// many desktops don't have this exported yet
 		return theme.VariantDark
 	}
 
-	var value uint8
-	if err = call.Store(&value); err != nil {
-		fyne.LogError("failed to read theme variant from D-Bus", err)
-		return theme.VariantDark
-	}
+	return colorSchemeToThemeVariant(colorScheme)
+}
 
-	// See: https://github.com/flatpak/xdg-desktop-portal/blob/1.16.0/data/org.freedesktop.impl.portal.Settings.xml#L32-L46
-	// 0: No preference
-	// 1: Prefer dark appearance
-	// 2: Prefer light appearance
-	switch value {
-	case 2:
+func colorSchemeToThemeVariant(colorScheme appearance.ColorScheme) fyne.ThemeVariant {
+	switch colorScheme {
+	case appearance.Light:
 		return theme.VariantLight
-	case 1:
+	case appearance.Dark:
 		return theme.VariantDark
-	default:
-		// Default to light theme to support Gnome's default see https://github.com/fyne-io/fyne/pull/3561
-		return theme.VariantLight
 	}
+
+	// Default to light theme to support Gnome's default see https://github.com/fyne-io/fyne/pull/3561
+	return theme.VariantLight
 }
 
 func (a *fyneApp) SendNotification(n *fyne.Notification) {
@@ -139,14 +121,14 @@ func rootConfigDir() string {
 
 func watchTheme() {
 	go func() {
-		// with portal this may not be immediate, so we update a cache instead
+		// Theme lookup hangs on some desktops. Update theme variant cache from within goroutine.
 		internalapp.CurrentVariant.Store(uint64(findFreedesktopColorScheme()))
-		// ensure initial variant setting is applied at startup
 		fyne.CurrentApp().Settings().(*settings).setupTheme()
 
 		portalSettings.OnSignalSettingChanged(func(changed portalSettings.Changed) {
 			if changed.Namespace == "org.freedesktop.appearance" && changed.Key == "color-scheme" {
-				internalapp.CurrentVariant.Store(uint64(findFreedesktopColorScheme()))
+				themeVariant := colorSchemeToThemeVariant(appearance.ColorScheme(changed.Value.(uint32)))
+				internalapp.CurrentVariant.Store(uint64(themeVariant))
 				fyne.CurrentApp().Settings().(*settings).setupTheme()
 			}
 		})