Add BTComment task

bt/tasks/bt_comment.cpp

@@ -0,0 +1,19 @@
+/**
+ * bt_comment.cpp
+ * =============================================================================
+ * Copyright 2021-2023 Serhii Snitsaruk
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ * =============================================================================
+ */
+
+#include "bt_comment.h"
+
+Ref<BTTask> BTComment::clone() const {
+	if (Engine::get_singleton()->is_editor_hint()) {
+		return BTTask::clone();
+	}
+	return nullptr;
+}

bt/tasks/bt_comment.h

@@ -0,0 +1,26 @@
+/**
+ * bt_comment.h
+ * =============================================================================
+ * Copyright 2021-2023 Serhii Snitsaruk
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ * =============================================================================
+ */
+/* bt_comment.h */
+
+#ifndef BT_COMMENT_H
+#define BT_COMMENT_H
+
+#include "bt_task.h"
+
+class BTComment : public BTTask {
+	GDCLASS(BTComment, BTTask);
+
+private:
+public:
+	virtual Ref<BTTask> clone() const override;
+};
+
+#endif // BT_COMMENT

bt/tasks/bt_task.cpp

@@ -104,10 +104,19 @@ Ref<BTTask> BTTask::clone() const {
 	inst->data.parent = nullptr;
 	inst->data.agent = nullptr;
 	inst->data.blackboard.unref();
+	int num_null = 0;
 	for (int i = 0; i < data.children.size(); i++) {
 		Ref<BTTask> c = get_child(i)->clone();
+		if (c.is_valid()) {
 			c->data.parent = inst.ptr();
-		inst->data.children.set(i, c);
+			inst->data.children.set(i - num_null, c);
+		} else {
+			num_null += 1;
+		}
+	}
+	if (num_null > 0) {
+		// * BTComment tasks return nullptr at runtime - we remove those.
+		inst->data.children.resize(data.children.size() - num_null);
 	}
 
 	// Make BBParam properties unique.

config.py

@@ -65,6 +65,7 @@ def get_doc_classes():
         "BTCheckAgentProperty",
         "BTCheckTrigger",
         "BTCheckVar",
+        "BTComment",
         "BTComposite",
         "BTCondition",
         "BTConsolePrint",

editor/limbo_ai_editor_plugin.cpp

@@ -94,9 +94,12 @@ void TaskTree::_update_item(TreeItem *p_item) {
 	Ref<BTTask> task = p_item->get_metadata(0);
 	ERR_FAIL_COND_MSG(!task.is_valid(), "Invalid task reference in metadata.");
 	p_item->set_text(0, task->get_task_name());
-	if (task->get_custom_name().is_empty()) {
+	if (task->is_class("BTComment")) {
+		p_item->set_custom_font(0, (get_theme_font(SNAME("doc_italic"), SNAME("EditorFonts"))));
+		p_item->set_custom_color(0, get_theme_color(SNAME("disabled_font_color"), SNAME("Editor")));
+	} else if (task->get_custom_name().is_empty()) {
 		p_item->set_custom_font(0, nullptr);
-		// p_item->clear_custom_color(0);
+		p_item->clear_custom_color(0);
 	} else {
 		p_item->set_custom_font(0, (get_theme_font(SNAME("bold"), SNAME("EditorFonts"))));
 		// p_item->set_custom_color(0, get_theme_color(SNAME("warning_color"), SNAME("Editor")));
@@ -1333,6 +1336,15 @@ LimboAIEditor::LimboAIEditor() {
 	fav_tasks_hbox = memnew(HBoxContainer);
 	toolbar->add_child(fav_tasks_hbox);
 
+	comment_btn = memnew(Button);
+	comment_btn->set_text(TTR("Comment"));
+	comment_btn->set_icon(LimboUtility::get_singleton()->get_task_icon("BTComment"));
+	comment_btn->set_tooltip_text(TTR("Add a BTComment task."));
+	comment_btn->set_flat(true);
+	comment_btn->set_focus_mode(Control::FOCUS_NONE);
+	comment_btn->connect("pressed", callable_mp(this, &LimboAIEditor::_add_task_by_class_or_path).bind("BTComment"));
+	toolbar->add_child(comment_btn);
+
 	toolbar->add_child(memnew(VSeparator));
 
 	new_btn = memnew(Button);

editor/limbo_ai_editor_plugin.h

@@ -171,6 +171,7 @@ private:
 	TaskPanel *task_panel;
 	HBoxContainer *fav_tasks_hbox;
 
+	Button *comment_btn;
 	Button *new_btn;
 	Button *load_btn;
 	Button *save_btn;

register_types.cpp

@@ -60,6 +60,7 @@
 #include "bt/tasks/actions/bt_wait.h"
 #include "bt/tasks/actions/bt_wait_ticks.h"
 #include "bt/tasks/bt_action.h"
+#include "bt/tasks/bt_comment.h"
 #include "bt/tasks/bt_composite.h"
 #include "bt/tasks/bt_condition.h"
 #include "bt/tasks/bt_decorator.h"
@@ -120,6 +121,8 @@ void initialize_limboai_module(ModuleInitializationLevel p_level) {
 		GDREGISTER_CLASS(BTPlayer);
 		GDREGISTER_CLASS(BTState);
 
+		GDREGISTER_CLASS(BTComment);
+
 		GDREGISTER_CLASS(BTComposite);
 		GDREGISTER_CLASS(BTSequence);
 		GDREGISTER_CLASS(BTSelector);