Auto set floating mode window to be always above

pkgs/flatpak/com.github.rafostar.Clapper.json

@@ -13,6 +13,7 @@
         "--share=network",
         "--device=all",
         "--filesystem=xdg-videos",
+        "--talk-name=org.gnome.Shell",
         "--env=GST_PLUGIN_SYSTEM_PATH=/app/lib/gstreamer-1.0",
         "--env=GST_VAAPI_ALL_DRIVERS=1"
     ],

src/dbus.js

@@ -0,0 +1,37 @@
+const { Gio } = imports.gi;
+const Debug = imports.src.debug;
+
+const { debug } = Debug;
+
+const ShellProxyWrapper = Gio.DBusProxy.makeProxyWrapper(`
+<node>
+  <interface name="org.gnome.Shell">
+    <method name="Eval">
+      <arg type="s" direction="in" name="script"/>
+      <arg type="b" direction="out" name="success"/>
+      <arg type="s" direction="out" name="result"/>
+    </method>
+  </interface>
+</node>`
+);
+
+let shellProxy = new ShellProxyWrapper(
+    Gio.DBus.session, 'org.gnome.Shell', '/org/gnome/Shell'
+);
+
+function callMakeAbove(isAbove)
+{
+    const un = (isAbove) ? '' : 'un';
+
+    debug('changing window keep above');
+    shellProxy.EvalRemote(
+        `global.display.focus_window.${un}make_above()`,
+        (out) => {
+            const debugMsg = (out[0])
+                ? `window keep above: ${isAbove}`
+                : new Error(out[1]);
+
+            debug(debugMsg);
+        }
+    );
+}

src/revealers.js

@@ -1,6 +1,7 @@
 const { GLib, GObject, Gtk, Pango } = imports.gi;
 const { HeaderBar } = imports.src.headerbar;
 const Debug = imports.src.debug;
+const DBus = imports.src.dbus;
 
 const REVEAL_TIME = 800;
 
@@ -264,6 +265,8 @@ class ClapperControlsRevealer extends Gtk.Revealer
 
         widget.height_request = widget.get_height();
         this.reveal_child ^= true;
+
+        DBus.callMakeAbove(!this.reveal_child);
     }
 
     _onControlsRevealed()