feat: show the bubble on gnome

src/lib/menu.sh

@@ -276,8 +276,7 @@ fu_ui_status() {
 #          heading, with only the label after it
 #   type   bool, choice (steps through the choices) or camera
 #   needs  a bool setting this one does nothing without; it is dimmed while
-#          that is off. Layers is no setting: whether the desktop can show
-#          the bubble at all (GNOME cannot).
+#          that is off
 FU_SETTINGS=(
 	"group|Lock screen"
 	"user|LockScreen|bool|yes|Unlock with your face"
@@ -295,7 +294,7 @@ FU_SETTINGS=(
 	"sys|Adapt|bool|yes|Learn from every unlock"
 	"sys|SkipLidClosed|bool|yes|Not when the lid is closed"
 	"group|Bubble"
-	"user|Bubble|bool|yes|Show the bubble||Layers"
+	"user|Bubble|bool|yes|Show the bubble"
 	"user|BubbleStyle|choice|full|Style|full,minimal|Bubble"
 	"user|AnimationSpeed|choice|normal|Animation speed|slow,normal,fast|Bubble"
 	"user|BubbleForPrompts|bool|yes|Also for sudo and admin prompts||Bubble"
@@ -304,10 +303,12 @@ FU_SETTINGS=(
 # fu_setting_help <Key> <value>
 # What a setting does, shown under the list for the selected one.
 fu_setting_help() {
-	if [[ $FU_DESKTOP == gnome && $1 =~ ^(Bubble|BubbleStyle|AnimationSpeed|BubbleForPrompts)$ ]]; then
-		fu_msg "GNOME does not let other programs show above its windows, so there is no bubble on GNOME."
-		return
-	fi
+	case "$FU_DESKTOP:$1" in
+		gnome:Bubble)
+			fu_msg "On GNOME a small GNOME extension shows the bubble. Turning face unlock on switches it on."
+			return
+			;;
+	esac
 	case "$1:$2" in
 		LockScreen:*)       fu_msg "Unlocks the lock screen when it sees your face. Off: only your password works there." ;;
 		ScanOnWake:*)       fu_msg "Scans when you press a key or move the mouse on the lock screen, and when the computer wakes up." ;;
@@ -523,8 +524,6 @@ fu_ui_settings() {
 				values[i]="$FU_SETTING_VALUE"
 				current[${keys[i]}]="$FU_SETTING_VALUE"
 			done
-			current[Layers]=yes
-			[[ $FU_DESKTOP == gnome ]] && current[Layers]=no current[Bubble]=no
 			dirty=0
 		fi
 

src/lib/system.sh

@@ -145,6 +145,46 @@ fu_agent_hint() {
 	fi
 }
 
+# ---------------------------------------------------------------------------
+# The bubble's GNOME Shell extension
+# ---------------------------------------------------------------------------
+# GNOME lets no program draw above its windows; its extensions may. The
+# package brings one, and turning face unlock on switches it on.
+
+FU_GNOME_EXTENSION="face-unlock@loonixtools.github.io"
+
+# fu_gnome_extension_enable
+# gnome-extensions only knows the extensions GNOME found when the session
+# started. One that came with the package later goes straight into the
+# setting, and GNOME loads it at the next login: returns 2 then.
+fu_gnome_extension_enable() {
+	local list new
+	fu_have gsettings || return 1
+	if gnome-extensions info "$FU_GNOME_EXTENSION" > /dev/null 2>&1; then
+		gnome-extensions enable "$FU_GNOME_EXTENSION" > /dev/null 2>&1 && return 0
+	fi
+	list="$(gsettings get org.gnome.shell enabled-extensions 2>/dev/null)" || return 1
+	case "$list" in
+		*"'$FU_GNOME_EXTENSION'"*) return 2 ;;
+		'@as []'|'[]') new="['$FU_GNOME_EXTENSION']" ;;
+		*) new="${list%]}, '$FU_GNOME_EXTENSION']" ;;
+	esac
+	gsettings set org.gnome.shell enabled-extensions "$new" || return 1
+	return 2
+}
+
+fu_gnome_extension_disable() {
+	local list
+	fu_have gsettings || return 0
+	gnome-extensions disable "$FU_GNOME_EXTENSION" > /dev/null 2>&1 && return 0
+	list="$(gsettings get org.gnome.shell enabled-extensions 2>/dev/null)" || return 0
+	list="${list//, \'$FU_GNOME_EXTENSION\'/}"
+	list="${list//\'$FU_GNOME_EXTENSION\', /}"
+	list="${list//\'$FU_GNOME_EXTENSION\'/}"
+	[[ $list == '[]' ]] && list='@as []'
+	gsettings set org.gnome.shell enabled-extensions "$list" > /dev/null 2>&1 || true
+}
+
 fu_agent_disable() {
 	systemctl --user disable --now "$FU_UNIT_AGENT" > /dev/null 2>&1 || true
 }