godot/modules/mono/glue/scene_tree_glue.cpp

/*************************************************************************/
/*  scene_tree_glue.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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#ifdef MONO_GLUE_ENABLED

#include "core/array.h"
#include "core/class_db.h"
#include "core/string_name.h"
#include "scene/main/node.h"
#include "scene/main/scene_tree.h"

#include "../csharp_script.h"
#include "../mono_gd/gd_mono_marshal.h"
#include "../mono_gd/gd_mono_utils.h"

Array *godot_icall_SceneTree_get_nodes_in_group_Generic(SceneTree *ptr, StringName *group, MonoReflectionType *refltype) {
	List<Node *> nodes;
	Array ret;

	// Retrieve all the nodes in the group
	ptr->get_nodes_in_group(*group, &nodes);

	// No need to bother if the group is empty
	if (!nodes.empty()) {
		MonoType *elem_type = mono_reflection_type_get_type(refltype);
		MonoClass *mono_class = mono_class_from_mono_type(elem_type);
		GDMonoClass *klass = GDMono::get_singleton()->get_class(mono_class);

		if (klass == GDMonoUtils::get_class_native_base(klass)) {
			// If we're trying to get native objects, just check the inheritance list
			StringName native_class_name = GDMonoUtils::get_native_godot_class_name(klass);
			for (int i = 0; i < nodes.size(); ++i) {
				if (ClassDB::is_parent_class(nodes[i]->get_class(), native_class_name)) {
					ret.push_back(nodes[i]);
				}
			}
		} else {
			// If we're trying to get csharpscript instances, get the mono object and compare the classes
			for (int i = 0; i < nodes.size(); ++i) {
				CSharpInstance *si = CAST_CSHARP_INSTANCE(nodes[i]->get_script_instance());

				if (si != nullptr) {
					MonoObject *obj = si->get_mono_object();
					if (obj != nullptr && mono_object_get_class(obj) == mono_class) {
						ret.push_back(nodes[i]);
					}
				}
			}
		}
	}

	return memnew(Array(ret));
}

void godot_register_scene_tree_icalls() {
	mono_add_internal_call("Godot.SceneTree::godot_icall_SceneTree_get_nodes_in_group_Generic", (void *)godot_icall_SceneTree_get_nodes_in_group_Generic);
}

#endif // MONO_GLUE_ENABLED