Expose a method to get hovered Control in Viewport

doc/classes/Viewport.xml

@@ -128,6 +128,13 @@
 				Returns the [Control] having the focus within this viewport. If no [Control] has the focus, returns null.
 			</description>
 		</method>
+		<method name="gui_get_hovered_control" qualifiers="const">
+			<return type="Control" />
+			<description>
+				Returns the [Control] that the mouse is currently hovering over in this viewport. If no [Control] has the cursor, returns null.
+				Typically the leaf [Control] node or deepest level of the subtree which claims hover. This is very useful when used together with [method Node.is_ancestor_of] to find if the mouse is within a control tree.
+			</description>
+		</method>
 		<method name="gui_is_drag_successful" qualifiers="const">
 			<return type="bool" />
 			<description>

scene/main/viewport.cpp

@@ -3518,6 +3518,11 @@ Control *Viewport::gui_get_focus_owner() const {
 	return gui.key_focus;
 }
 
+Control *Viewport::gui_get_hovered_control() const {
+	ERR_READ_THREAD_GUARD_V(nullptr);
+	return gui.mouse_over;
+}
+
 void Viewport::set_msaa_2d(MSAA p_msaa) {
 	ERR_MAIN_THREAD_GUARD;
 	ERR_FAIL_INDEX(p_msaa, MSAA_MAX);
@@ -4557,6 +4562,7 @@ void Viewport::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("gui_release_focus"), &Viewport::gui_release_focus);
 	ClassDB::bind_method(D_METHOD("gui_get_focus_owner"), &Viewport::gui_get_focus_owner);
+	ClassDB::bind_method(D_METHOD("gui_get_hovered_control"), &Viewport::gui_get_hovered_control);
 
 	ClassDB::bind_method(D_METHOD("set_disable_input", "disable"), &Viewport::set_disable_input);
 	ClassDB::bind_method(D_METHOD("is_input_disabled"), &Viewport::is_input_disabled);

scene/main/viewport.h

@@ -610,6 +610,7 @@ public:
 
 	void gui_release_focus();
 	Control *gui_get_focus_owner() const;
+	Control *gui_get_hovered_control() const;
 
 	PackedStringArray get_configuration_warnings() const override;