Add configuration for GNOME

.local/bin/dark-scheme-toggle

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# Triggered by <Super><Alt>d
+# as defined in [org/gnome/settings-daemon/plugins/media-keys]
+# in ~/.config/gnome-settings/key-bindings.ini
+
+set -eu
+
+
+XDG_CONFIG_HOME="${XDG_CONFIG_HOME:-$HOME/.config}"
+
+Forge=org.gnome.shell.extensions.forge
+Interface=org.gnome.desktop.interface
+
+
+if [ "$(gsettings get $Interface color-scheme)" = "'prefer-dark'" ]; then
+    new_theme="light"
+else
+    new_theme="dark"
+fi
+
+
+# Render and apply the palette for the target scheme before flipping,
+# so that the visible switch happens in one step
+"$HOME/.local/bin/color-palette" --write --scheme "$new_theme"
+
+
+dconf load / < "$XDG_CONFIG_HOME/gnome-settings/local/palette.ini"
+
+
+# Set the "color-scheme" explicitly here to be on the safe side
+# (although it is also contained in the palette.ini file)
+#
+# See comments for "color-scheme" under [org/gnome/desktop/interface]
+# in ~/.config/gnome-settings/misc.ini
+gsettings set $Interface color-scheme "prefer-$new_theme"
+
+
+# `forge` only re-reads its stylesheet on a restart;
+# however, it takes about one second to do so
+# gnome-extensions disable forge@jmmaranan.com
+# gnome-extensions enable forge@jmmaranan.com
+
+# As a hack, we make `forge` re-read its stylesheet by poking a watched setting
+if gnome-extensions list --enabled 2>/dev/null | grep -qxF "forge@jmmaranan.com"; then
+    _gap=$(gsettings get $Forge window-gap-size | awk '{print $2}')
+    gsettings set $Forge window-gap-size "uint32 $((_gap + 1))"
+    gsettings set $Forge window-gap-size "uint32 $_gap"
+fi
+
+
+echo "Switched the color theme to $new_theme"