emacs: dark/light mode with dbus support

1 files changed, 33 insertions, 1 deletions

diff --git a/.emacs.local.d/modes/themes.el b/.emacs.local.d/modes/themes.el
index a8e7787..f9077b7 100644
--- a/.emacs.local.d/modes/themes.el
+++ b/.emacs.local.d/modes/themes.el
@@ -1 +1,33 @@
-(load-theme 'doom-sourcerer t)
+(use-package dbus)
+(defun mf/set-theme-from-dbus-value (value)
+  "Set the appropiate theme according to the color-scheme setting value."
+  (message "value is %s" value)
+  (if (equal value '1)
+      (progn (message "Switch to dark theme")
+             (modus-themes-load-vivendi))
+    (progn (message "Switch to light theme")
+           (modus-themes-load-operandi))))
+
+(defun mf/color-scheme-changed (path var value)
+  "DBus handler to detect when the color-scheme has changed."
+  (when (and (string-equal path "org.freedesktop.appearance")
+             (string-equal var "color-scheme"))
+    (mf/set-theme-from-dbus-value (car value))
+    ))
+
+;; Register for future changes
+(dbus-register-signal
+ :session "org.freedesktop.portal.Desktop"
+ "/org/freedesktop/portal/desktop" "org.freedesktop.portal.Settings"
+ "SettingChanged"
+ #'mf/color-scheme-changed)
+
+;; Request the current color-scheme
+(dbus-call-method-asynchronously
+ :session "org.freedesktop.portal.Desktop"
+ "/org/freedesktop/portal/desktop" "org.freedesktop.portal.Settings"
+ "Read"
+ (lambda (value) (mf/set-theme-from-dbus-value (caar value)))
+ "org.freedesktop.appearance"
+ "color-scheme"
+ )