Live edit WORK IN PROGRESS

1) press the heart while the game is running
2) select a scene to live edit from the opened scenes
3) edit/add/remove nodes or resources, change their properties, etc.
4) watch changes reflected in running game, in all places this scene is
edited
5) It's not perfect obviously, but the aim of it is to try to reflect
your changes as best as possible in the running game.

scene/main/node.cpp

@@ -196,6 +196,14 @@ void Node::_propagate_enter_tree() {
 	}	
 
 	data.blocked--;
+
+#ifdef DEBUG_ENABLED
+
+	if (ScriptDebugger::get_singleton() && data.filename!=String()) {
+		//used for live edit
+		data.tree->live_scene_edit_cache[data.filename].insert(this);
+	}
+#endif
 	// enter groups
 }
 
@@ -205,6 +213,19 @@ void Node::_propagate_exit_tree() {
 
 	//block while removing children
 
+#ifdef DEBUG_ENABLED
+
+	if (ScriptDebugger::get_singleton() && data.filename!=String()) {
+		//used for live edit
+		Map<String,Set<Node*> >::Element *E=data.tree->live_scene_edit_cache.find(data.filename);
+		if (E) {
+			E->get().erase(this);
+			if (E->get().size()==0) {
+				data.tree->live_scene_edit_cache.erase(E);
+			}
+		}
+	}
+#endif
 	data.blocked++;
 
 	for (int i=data.children.size()-1;i>=0;i--) {
@@ -552,6 +573,52 @@ void Node::set_human_readable_collision_renaming(bool p_enabled) {
 }
 
 
+
+String Node::validate_child_name(const String& p_name) const {
+
+	//this approach to autoset node names is human readable but very slow
+	//it's turned on while running in the editor
+
+	String basename = p_name;
+
+	if (basename==String()) {
+
+		return String();
+	}
+
+	int val=1;
+
+	for(;;) {
+
+		String attempted = val > 1 ? (basename + " " +itos(val) ) : basename;
+
+		bool found=false;
+
+		for (int i=0;i<data.children.size();i++) {
+
+			//if (data.children[i]==p_child)
+			//	continue;
+			if (data.children[i]->get_name() == attempted) {
+				found=true;
+				break;
+			}
+
+		}
+
+		if (found) {
+
+			val++;
+			continue;
+		}
+
+		return attempted;
+		break;
+	}
+
+	return basename;
+
+}
+
 void Node::_validate_child_name(Node *p_child) {
 
 	/* Make sure the name is unique */
@@ -1323,18 +1390,31 @@ int Node::get_position_in_parent() const {
 
 
 
-Node *Node::duplicate() const {
+Node *Node::duplicate(bool p_use_instancing) const {
 
 
 	Node *node=NULL;
 
-	Object *obj = ObjectTypeDB::instance(get_type());
-	ERR_FAIL_COND_V(!obj,NULL);
-	node = obj->cast_to<Node>();
-	if (!node)
-		memdelete(obj);
-	ERR_FAIL_COND_V(!node,NULL);
+	bool instanced=false;
 
+	if (p_use_instancing && get_filename()!=String()) {
+
+		Ref<PackedScene> res = ResourceLoader::load(get_filename());
+		ERR_FAIL_COND_V(res.is_null(),NULL);
+		node=res->instance();
+		ERR_FAIL_COND_V(!node,NULL);
+
+		instanced=true;
+
+	} else {
+
+		Object *obj = ObjectTypeDB::instance(get_type());
+		ERR_FAIL_COND_V(!obj,NULL);
+		node = obj->cast_to<Node>();
+		if (!node)
+			memdelete(obj);
+		ERR_FAIL_COND_V(!node,NULL);
+	}
 
 
 	if (get_filename()!="") { //an instance
@@ -1360,7 +1440,10 @@ Node *Node::duplicate() const {
 
 		if (get_child(i)->data.parent_owned)
 			continue;
-		Node *dup = get_child(i)->duplicate();
+		if (instanced && get_child(i)->data.owner==this)
+			continue; //part of instance
+
+		Node *dup = get_child(i)->duplicate(p_use_instancing);
 		if (!dup) {
 
 			memdelete(node);
@@ -1882,7 +1965,7 @@ void Node::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("get_tree:SceneTree"),&Node::get_tree);
 
-	ObjectTypeDB::bind_method(_MD("duplicate:Node"),&Node::duplicate);
+	ObjectTypeDB::bind_method(_MD("duplicate:Node","use_instancing"),&Node::duplicate,DEFVAL(false));
 	ObjectTypeDB::bind_method(_MD("replace_by","node:Node","keep_data"),&Node::replace_by,DEFVAL(false));
 
 	ObjectTypeDB::bind_method(_MD("get_viewport"),&Node::get_viewport);