TOOLS: add a lua script for a -stay on top only during playback- mode

Signed-off-by: wm4 <wm4@nowhere>

TOOLS/lua/ontop-playback.lua

@@ -0,0 +1,19 @@
+--makes mpv disable ontop when pausing and re-enable it again when resuming playback
+--please note that this won't do anything if ontop was not enabled before pausing
+
+local was_ontop = false
+
+mp.observe_property("pause", "bool", function(name, value)
+    local ontop = mp.get_property_native("ontop")
+    if value then
+        if ontop then
+            mp.set_property_native("ontop", false)
+            was_ontop = true
+        end
+    else
+        if was_ontop and not ontop then
+            mp.set_property_native("ontop", true)
+        end
+        was_ontop = false
+    end
+end)