godot/editor/scene_tree_dock.cpp

/*************************************************************************/
/*  scene_tree_dock.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "scene_tree_dock.h"

#include "core/config/project_settings.h"
#include "core/input/input.h"
#include "core/io/resource_saver.h"
#include "core/os/keyboard.h"
#include "editor/debugger/editor_debugger_node.h"
#include "editor/editor_feature_profile.h"
#include "editor/editor_node.h"
#include "editor/editor_scale.h"
#include "editor/editor_settings.h"
#include "editor/multi_node_edit.h"
#include "editor/plugins/animation_player_editor_plugin.h"
#include "editor/plugins/canvas_item_editor_plugin.h"
#include "editor/plugins/node_3d_editor_plugin.h"
#include "editor/plugins/script_editor_plugin.h"
#include "scene/main/window.h"
#include "scene/resources/packed_scene.h"
#include "servers/display_server.h"
#include "servers/rendering_server.h"

void SceneTreeDock::_nodes_drag_begin() {
	if (restore_script_editor_on_drag) {
		EditorNode::get_singleton()->set_visible_editor(EditorNode::EDITOR_SCRIPT);
		restore_script_editor_on_drag = false;
	}
}

void SceneTreeDock::_quick_open() {
	instance_scenes(quick_open->get_selected_files(), scene_tree->get_selected());
}

void SceneTreeDock::_input(Ref<InputEvent> p_event) {
	Ref<InputEventMouseButton> mb = p_event;

	if (mb.is_valid() && !mb->is_pressed() && mb->get_button_index() == BUTTON_LEFT) {
		restore_script_editor_on_drag = false; //lost chance
	}
}

void SceneTreeDock::_unhandled_key_input(Ref<InputEvent> p_event) {
	if (get_focus_owner() && get_focus_owner()->is_text_field()) {
		return;
	}

	if (!p_event->is_pressed() || p_event->is_echo()) {
		return;
	}

	if (ED_IS_SHORTCUT("scene_tree/batch_rename", p_event)) {
		_tool_selected(TOOL_BATCH_RENAME);
	} else if (ED_IS_SHORTCUT("scene_tree/rename", p_event)) {
		_tool_selected(TOOL_RENAME);
	} else if (ED_IS_SHORTCUT("scene_tree/add_child_node", p_event)) {
		_tool_selected(TOOL_NEW);
	} else if (ED_IS_SHORTCUT("scene_tree/instance_scene", p_event)) {
		_tool_selected(TOOL_INSTANCE);
	} else if (ED_IS_SHORTCUT("scene_tree/expand_collapse_all", p_event)) {
		_tool_selected(TOOL_EXPAND_COLLAPSE);
	} else if (ED_IS_SHORTCUT("scene_tree/cut_node", p_event)) {
		_tool_selected(TOOL_CUT);
	} else if (ED_IS_SHORTCUT("scene_tree/copy_node", p_event)) {
		_tool_selected(TOOL_COPY);
	} else if (ED_IS_SHORTCUT("scene_tree/paste_node", p_event)) {
		_tool_selected(TOOL_PASTE);
	} else if (ED_IS_SHORTCUT("scene_tree/change_node_type", p_event)) {
		_tool_selected(TOOL_REPLACE);
	} else if (ED_IS_SHORTCUT("scene_tree/duplicate", p_event)) {
		_tool_selected(TOOL_DUPLICATE);
	} else if (ED_IS_SHORTCUT("scene_tree/attach_script", p_event)) {
		_tool_selected(TOOL_ATTACH_SCRIPT);
	} else if (ED_IS_SHORTCUT("scene_tree/detach_script", p_event)) {
		_tool_selected(TOOL_DETACH_SCRIPT);
	} else if (ED_IS_SHORTCUT("scene_tree/move_up", p_event)) {
		_tool_selected(TOOL_MOVE_UP);
	} else if (ED_IS_SHORTCUT("scene_tree/move_down", p_event)) {
		_tool_selected(TOOL_MOVE_DOWN);
	} else if (ED_IS_SHORTCUT("scene_tree/reparent", p_event)) {
		_tool_selected(TOOL_REPARENT);
	} else if (ED_IS_SHORTCUT("scene_tree/save_branch_as_scene", p_event)) {
		_tool_selected(TOOL_NEW_SCENE_FROM);
	} else if (ED_IS_SHORTCUT("scene_tree/delete_no_confirm", p_event)) {
		_tool_selected(TOOL_ERASE, true);
	} else if (ED_IS_SHORTCUT("scene_tree/copy_node_path", p_event)) {
		_tool_selected(TOOL_COPY_NODE_PATH);
	} else if (ED_IS_SHORTCUT("scene_tree/delete", p_event)) {
		_tool_selected(TOOL_ERASE);
	} else {
		return;
	}

	// Tool selection was successful, accept the event to stop propagation.
	accept_event();
}

void SceneTreeDock::instance(const String &p_file) {
	Vector<String> scenes;
	scenes.push_back(p_file);
	instance_scenes(scenes, scene_tree->get_selected());
}

void SceneTreeDock::instance_scenes(const Vector<String> &p_files, Node *p_parent) {
	Node *parent = p_parent;

	if (!parent) {
		parent = scene_tree->get_selected();
	}

	if (!parent || !edited_scene) {
		if (p_files.size() == 1) {
			accept->set_text(TTR("No parent to instance a child at."));
		} else {
			accept->set_text(TTR("No parent to instance the scenes at."));
		}
		accept->popup_centered();
		return;
	};

	_perform_instance_scenes(p_files, parent, -1);
}

void SceneTreeDock::_perform_instance_scenes(const Vector<String> &p_files, Node *parent, int p_pos) {
	ERR_FAIL_COND(!parent);

	Vector<Node *> instances;

	bool error = false;

	for (int i = 0; i < p_files.size(); i++) {
		Ref<PackedScene> sdata = ResourceLoader::load(p_files[i]);
		if (!sdata.is_valid()) {
			current_option = -1;
			accept->set_text(vformat(TTR("Error loading scene from %s"), p_files[i]));
			accept->popup_centered();
			error = true;
			break;
		}

		Node *instanced_scene = sdata->instance(PackedScene::GEN_EDIT_STATE_INSTANCE);
		if (!instanced_scene) {
			current_option = -1;
			accept->set_text(vformat(TTR("Error instancing scene from %s"), p_files[i]));
			accept->popup_centered();
			error = true;
			break;
		}

		if (edited_scene->get_filename() != "") {
			if (_cyclical_dependency_exists(edited_scene->get_filename(), instanced_scene)) {
				accept->set_text(vformat(TTR("Cannot instance the scene '%s' because the current scene exists within one of its nodes."), p_files[i]));
				accept->popup_centered();
				error = true;
				break;
			}
		}

		instanced_scene->set_filename(ProjectSettings::get_singleton()->localize_path(p_files[i]));

		instances.push_back(instanced_scene);
	}

	if (error) {
		for (int i = 0; i < instances.size(); i++) {
			memdelete(instances[i]);
		}
		return;
	}

	editor_data->get_undo_redo().create_action(TTR("Instance Scene(s)"));

	for (int i = 0; i < instances.size(); i++) {
		Node *instanced_scene = instances[i];

		editor_data->get_undo_redo().add_do_method(parent, "add_child", instanced_scene);
		if (p_pos >= 0) {
			editor_data->get_undo_redo().add_do_method(parent, "move_child", instanced_scene, p_pos + i);
		}
		editor_data->get_undo_redo().add_do_method(instanced_scene, "set_owner", edited_scene);
		editor_data->get_undo_redo().add_do_method(editor_selection, "clear");
		editor_data->get_undo_redo().add_do_method(editor_selection, "add_node", instanced_scene);
		editor_data->get_undo_redo().add_do_reference(instanced_scene);
		editor_data->get_undo_redo().add_undo_method(parent, "remove_child", instanced_scene);

		String new_name = parent->validate_child_name(instanced_scene);
		EditorDebuggerNode *ed = EditorDebuggerNode::get_singleton();
		editor_data->get_undo_redo().add_do_method(ed, "live_debug_instance_node", edited_scene->get_path_to(parent), p_files[i], new_name);
		editor_data->get_undo_redo().add_undo_method(ed, "live_debug_remove_node", NodePath(String(edited_scene->get_path_to(parent)).plus_file(new_name)));
	}

	editor_data->get_undo_redo().commit_action();
	editor->push_item(instances[instances.size() - 1]);
}

void SceneTreeDock::_replace_with_branch_scene(const String &p_file, Node *base) {
	Ref<PackedScene> sdata = ResourceLoader::load(p_file);
	if (!sdata.is_valid()) {
		accept->set_text(vformat(TTR("Error loading scene from %s"), p_file));
		accept->popup_centered();
		return;
	}

	Node *instanced_scene = sdata->instance(PackedScene::GEN_EDIT_STATE_INSTANCE);
	if (!instanced_scene) {
		accept->set_text(vformat(TTR("Error instancing scene from %s"), p_file));
		accept->popup_centered();
		return;
	}

	UndoRedo *undo_redo = editor->get_undo_redo();
	undo_redo->create_action(TTR("Replace with Branch Scene"));

	Node *parent = base->get_parent();
	int pos = base->get_index();
	undo_redo->add_do_method(parent, "remove_child", base);
	undo_redo->add_undo_method(parent, "remove_child", instanced_scene);
	undo_redo->add_do_method(parent, "add_child", instanced_scene);
	undo_redo->add_undo_method(parent, "add_child", base);
	undo_redo->add_do_method(parent, "move_child", instanced_scene, pos);
	undo_redo->add_undo_method(parent, "move_child", base, pos);

	List<Node *> owned;
	base->get_owned_by(base->get_owner(), &owned);
	Array owners;
	for (List<Node *>::Element *F = owned.front(); F; F = F->next()) {
		owners.push_back(F->get());
	}
	undo_redo->add_do_method(instanced_scene, "set_owner", edited_scene);
	undo_redo->add_undo_method(this, "_set_owners", edited_scene, owners);

	undo_redo->add_do_method(editor_selection, "clear");
	undo_redo->add_undo_method(editor_selection, "clear");
	undo_redo->add_do_method(editor_selection, "add_node", instanced_scene);
	undo_redo->add_undo_method(editor_selection, "add_node", base);
	undo_redo->add_do_property(scene_tree, "set_selected", instanced_scene);
	undo_redo->add_undo_property(scene_tree, "set_selected", base);

	undo_redo->add_do_reference(instanced_scene);
	undo_redo->add_undo_reference(base);
	undo_redo->commit_action();
}

bool SceneTreeDock::_cyclical_dependency_exists(const String &p_target_scene_path, Node *p_desired_node) {
	int childCount = p_desired_node->get_child_count();

	if (_track_inherit(p_target_scene_path, p_desired_node)) {
		return true;
	}

	for (int i = 0; i < childCount; i++) {
		Node *child = p_desired_node->get_child(i);

		if (_cyclical_dependency_exists(p_target_scene_path, child)) {
			return true;
		}
	}

	return false;
}

bool SceneTreeDock::_track_inherit(const String &p_target_scene_path, Node *p_desired_node) {
	Node *p = p_desired_node;
	bool result = false;
	Vector<Node *> instances;
	while (true) {
		if (p->get_filename() == p_target_scene_path) {
			result = true;
			break;
		}
		Ref<SceneState> ss = p->get_scene_inherited_state();
		if (ss.is_valid()) {
			String path = ss->get_path();
			Ref<PackedScene> data = ResourceLoader::load(path);
			if (data.is_valid()) {
				p = data->instance(PackedScene::GEN_EDIT_STATE_INSTANCE);
				if (!p) {
					continue;
				}
				instances.push_back(p);
			} else {
				break;
			}
		} else {
			break;
		}
	}
	for (int i = 0; i < instances.size(); i++) {
		memdelete(instances[i]);
	}
	return result;
}

void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
	current_option = p_tool;

	switch (p_tool) {
		case TOOL_BATCH_RENAME: {
			if (!profile_allow_editing) {
				break;
			}
			if (editor_selection->get_selected_node_list().size() > 1) {
				rename_dialog->popup_centered();
			}
		} break;
		case TOOL_RENAME: {
			if (!profile_allow_editing) {
				break;
			}
			Tree *tree = scene_tree->get_scene_tree();
			if (tree->is_anything_selected()) {
				tree->grab_focus();
				tree->edit_selected();
			}
		} break;
		case TOOL_NEW:
		case TOOL_REPARENT_TO_NEW_NODE: {
			if (!profile_allow_editing) {
				break;
			}

			// Prefer nodes that inherit from the current scene root.
			Node *current_edited_scene_root = EditorNode::get_singleton()->get_edited_scene();
			if (current_edited_scene_root) {
				String root_class = current_edited_scene_root->get_class_name();
				static Vector<String> preferred_types;
				if (preferred_types.is_empty()) {
					preferred_types.push_back("Control");
					preferred_types.push_back("Node2D");
					preferred_types.push_back("Node3D");
				}

				for (int i = 0; i < preferred_types.size(); i++) {
					if (ClassDB::is_parent_class(root_class, preferred_types[i])) {
						create_dialog->set_preferred_search_result_type(preferred_types[i]);
						break;
					}
				}
			}

			create_dialog->popup_create(true);
		} break;
		case TOOL_INSTANCE: {
			if (!profile_allow_editing) {
				break;
			}
			Node *scene = edited_scene;

			if (!scene) {
				EditorNode::get_singleton()->new_inherited_scene();
				break;
			}

			quick_open->popup_dialog("PackedScene", true);
			quick_open->set_title(TTR("Instance Child Scene"));

		} break;
		case TOOL_EXPAND_COLLAPSE: {
			if (!scene_tree->get_selected()) {
				break;
			}

			Tree *tree = scene_tree->get_scene_tree();
			TreeItem *selected_item = tree->get_selected();

			if (!selected_item) {
				selected_item = tree->get_root();
			}

			bool collapsed = _is_collapsed_recursive(selected_item);
			_set_collapsed_recursive(selected_item, !collapsed);

			tree->ensure_cursor_is_visible();

		} break;
		case TOOL_CUT:
		case TOOL_COPY: {
			if (!edited_scene || !_validate_no_foreign()) {
				break;
			}

			List<Node *> selection = editor_selection->get_selected_node_list();
			if (selection.size() == 0) {
				break;
			}

			if (!node_clipboard.is_empty()) {
				_clear_clipboard();
			}
			clipboard_source_scene = editor->get_edited_scene()->get_filename();

			selection.sort_custom<Node::Comparator>();

			for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
				Node *node = E->get();
				Map<const Node *, Node *> duplimap;
				Node *dup = node->duplicate_from_editor(duplimap);

				ERR_CONTINUE(!dup);

				node_clipboard.push_back(dup);
			}

			if (p_tool == TOOL_CUT) {
				_delete_confirm(true);
			}
		} break;
		case TOOL_PASTE: {
			if (node_clipboard.is_empty() || !edited_scene) {
				break;
			}

			bool has_cycle = false;
			if (edited_scene->get_filename() != String()) {
				for (List<Node *>::Element *E = node_clipboard.front(); E; E = E->next()) {
					if (edited_scene->get_filename() == E->get()->get_filename()) {
						has_cycle = true;
						break;
					}
				}
			}

			if (has_cycle) {
				current_option = -1;
				accept->set_text(TTR("Can't paste root node into the same scene."));
				accept->popup_centered();
				break;
			}

			Node *paste_parent = edited_scene;
			List<Node *> selection = editor_selection->get_selected_node_list();
			if (selection.size() > 0) {
				paste_parent = selection.back()->get();
			}

			Node *owner = paste_parent->get_owner();
			if (!owner) {
				owner = paste_parent;
			}

			editor_data->get_undo_redo().create_action(TTR("Paste Node(s)"));
			editor_data->get_undo_redo().add_do_method(editor_selection, "clear");

			Map<RES, RES> resource_remap;
			String target_scene = editor->get_edited_scene()->get_filename();
			if (target_scene != clipboard_source_scene) {
				if (!clipboard_resource_remap.has(target_scene)) {
					Map<RES, RES> remap;
					for (List<Node *>::Element *E = node_clipboard.front(); E; E = E->next()) {
						_create_remap_for_node(E->get(), remap);
					}
					clipboard_resource_remap[target_scene] = remap;
				}
				resource_remap = clipboard_resource_remap[target_scene];
			}

			for (List<Node *>::Element *E = node_clipboard.front(); E; E = E->next()) {
				Node *node = E->get();
				Map<const Node *, Node *> duplimap;

				Node *dup = node->duplicate_from_editor(duplimap, resource_remap);

				ERR_CONTINUE(!dup);

				editor_data->get_undo_redo().add_do_method(paste_parent, "add_child", dup);

				for (Map<const Node *, Node *>::Element *E2 = duplimap.front(); E2; E2 = E2->next()) {
					Node *d = E2->value();
					editor_data->get_undo_redo().add_do_method(d, "set_owner", owner);
				}

				editor_data->get_undo_redo().add_do_method(dup, "set_owner", owner);
				editor_data->get_undo_redo().add_do_method(editor_selection, "add_node", dup);
				editor_data->get_undo_redo().add_undo_method(paste_parent, "remove_child", dup);
				editor_data->get_undo_redo().add_do_reference(dup);

				if (node_clipboard.size() == 1) {
					editor_data->get_undo_redo().add_do_method(editor, "push_item", dup);
				}
			}

			editor_data->get_undo_redo().commit_action();
		} break;
		case TOOL_REPLACE: {
			if (!profile_allow_editing) {
				break;
			}

			if (!_validate_no_foreign()) {
				break;
			}

			if (!_validate_no_instance()) {
				break;
			}

			Node *selected = scene_tree->get_selected();
			if (!selected && !editor_selection->get_selected_node_list().is_empty()) {
				selected = editor_selection->get_selected_node_list().front()->get();
			}

			if (selected) {
				create_dialog->popup_create(false, true, selected->get_class());
			}

		} break;
		case TOOL_EXTEND_SCRIPT: {
			attach_script_to_selected(true);
		} break;
		case TOOL_ATTACH_SCRIPT: {
			attach_script_to_selected(false);
		} break;
		case TOOL_DETACH_SCRIPT: {
			if (!profile_allow_script_editing) {
				break;
			}

			Array selection = editor_selection->get_selected_nodes();

			if (selection.is_empty()) {
				return;
			}

			editor_data->get_undo_redo().create_action(TTR("Detach Script"));
			editor_data->get_undo_redo().add_do_method(editor, "push_item", (Script *)nullptr);

			for (int i = 0; i < selection.size(); i++) {
				Node *n = Object::cast_to<Node>(selection[i]);
				Ref<Script> existing = n->get_script();
				Ref<Script> empty = EditorNode::get_singleton()->get_object_custom_type_base(n);
				if (existing != empty) {
					editor_data->get_undo_redo().add_do_method(n, "set_script", empty);
					editor_data->get_undo_redo().add_undo_method(n, "set_script", existing);
				}
			}

			editor_data->get_undo_redo().add_do_method(this, "_update_script_button");
			editor_data->get_undo_redo().add_undo_method(this, "_update_script_button");

			editor_data->get_undo_redo().commit_action();
		} break;
		case TOOL_MOVE_UP:
		case TOOL_MOVE_DOWN: {
			if (!profile_allow_editing) {
				break;
			}

			if (!scene_tree->get_selected()) {
				break;
			}

			if (scene_tree->get_selected() == edited_scene) {
				current_option = -1;
				accept->set_text(TTR("This operation can't be done on the tree root."));
				accept->popup_centered();
				break;
			}

			if (!_validate_no_foreign()) {
				break;
			}

			bool MOVING_DOWN = (p_tool == TOOL_MOVE_DOWN);
			bool MOVING_UP = !MOVING_DOWN;

			Node *common_parent = scene_tree->get_selected()->get_parent();
			List<Node *> selection = editor_selection->get_selected_node_list();
			selection.sort_custom<Node::Comparator>(); // sort by index
			if (MOVING_DOWN) {
				selection.invert();
			}

			int lowest_id = common_parent->get_child_count() - 1;
			int highest_id = 0;
			for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
				int index = E->get()->get_index();

				if (index > highest_id) {
					highest_id = index;
				}
				if (index < lowest_id) {
					lowest_id = index;
				}

				if (E->get()->get_parent() != common_parent) {
					common_parent = nullptr;
				}
			}

			if (!common_parent || (MOVING_DOWN && highest_id >= common_parent->get_child_count() - MOVING_DOWN) || (MOVING_UP && lowest_id == 0)) {
				break; // one or more nodes can not be moved
			}

			if (selection.size() == 1) {
				editor_data->get_undo_redo().create_action(TTR("Move Node In Parent"));
			}
			if (selection.size() > 1) {
				editor_data->get_undo_redo().create_action(TTR("Move Nodes In Parent"));
			}

			for (int i = 0; i < selection.size(); i++) {
				Node *top_node = selection[i];
				Node *bottom_node = selection[selection.size() - 1 - i];

				ERR_FAIL_COND(!top_node->get_parent());
				ERR_FAIL_COND(!bottom_node->get_parent());

				int bottom_node_pos = bottom_node->get_index();
				int top_node_pos_next = top_node->get_index() + (MOVING_DOWN ? 1 : -1);

				editor_data->get_undo_redo().add_do_method(top_node->get_parent(), "move_child", top_node, top_node_pos_next);
				editor_data->get_undo_redo().add_undo_method(bottom_node->get_parent(), "move_child", bottom_node, bottom_node_pos);
			}

			editor_data->get_undo_redo().commit_action();

		} break;
		case TOOL_DUPLICATE: {
			if (!profile_allow_editing) {
				break;
			}

			if (!edited_scene) {
				break;
			}

			if (editor_selection->is_selected(edited_scene)) {
				current_option = -1;
				accept->set_text(TTR("This operation can't be done on the tree root."));
				accept->popup_centered();
				break;
			}

			if (!_validate_no_foreign()) {
				break;
			}

			List<Node *> selection = editor_selection->get_selected_node_list();
			if (selection.size() == 0) {
				break;
			}

			editor_data->get_undo_redo().create_action(TTR("Duplicate Node(s)"));
			editor_data->get_undo_redo().add_do_method(editor_selection, "clear");

			Node *dupsingle = nullptr;
			List<Node *> editable_children;

			selection.sort_custom<Node::Comparator>();

			Node *add_below_node = selection.back()->get();

			for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
				Node *node = E->get();
				Node *parent = node->get_parent();

				List<Node *> owned;
				node->get_owned_by(node->get_owner(), &owned);

				Map<const Node *, Node *> duplimap;
				Node *dup = node->duplicate_from_editor(duplimap);

				if (EditorNode::get_singleton()->get_edited_scene()->is_editable_instance(node)) {
					editable_children.push_back(dup);
				}

				ERR_CONTINUE(!dup);

				if (selection.size() == 1) {
					dupsingle = dup;
				}

				dup->set_name(parent->validate_child_name(dup));

				editor_data->get_undo_redo().add_do_method(add_below_node, "add_sibling", dup);

				for (List<Node *>::Element *F = owned.front(); F; F = F->next()) {
					if (!duplimap.has(F->get())) {
						continue;
					}
					Node *d = duplimap[F->get()];
					editor_data->get_undo_redo().add_do_method(d, "set_owner", node->get_owner());
				}
				editor_data->get_undo_redo().add_do_method(editor_selection, "add_node", dup);
				editor_data->get_undo_redo().add_undo_method(parent, "remove_child", dup);
				editor_data->get_undo_redo().add_do_reference(dup);

				EditorDebuggerNode *ed = EditorDebuggerNode::get_singleton();

				editor_data->get_undo_redo().add_do_method(ed, "live_debug_duplicate_node", edited_scene->get_path_to(node), dup->get_name());
				editor_data->get_undo_redo().add_undo_method(ed, "live_debug_remove_node", NodePath(String(edited_scene->get_path_to(parent)).plus_file(dup->get_name())));

				add_below_node = dup;
			}

			editor_data->get_undo_redo().commit_action();

			if (dupsingle) {
				editor->push_item(dupsingle);
			}

			for (List<Node *>::Element *E = editable_children.back(); E; E = E->prev()) {
				_toggle_editable_children(E->get());
			}

		} break;
		case TOOL_REPARENT: {
			if (!profile_allow_editing) {
				break;
			}

			if (!scene_tree->get_selected()) {
				break;
			}

			if (editor_selection->is_selected(edited_scene)) {
				current_option = -1;
				accept->set_text(TTR("This operation can't be done on the tree root."));
				accept->popup_centered();
				break;
			}

			if (!_validate_no_foreign()) {
				break;
			}

			List<Node *> nodes = editor_selection->get_selected_node_list();
			Set<Node *> nodeset;
			for (List<Node *>::Element *E = nodes.front(); E; E = E->next()) {
				nodeset.insert(E->get());
			}
			reparent_dialog->set_current(nodeset);
			reparent_dialog->popup_centered_clamped(Size2(350, 700) * EDSCALE);
		} break;
		case TOOL_MAKE_ROOT: {
			if (!profile_allow_editing) {
				break;
			}

			List<Node *> nodes = editor_selection->get_selected_node_list();
			ERR_FAIL_COND(nodes.size() != 1);

			Node *node = nodes.front()->get();
			Node *root = get_tree()->get_edited_scene_root();

			if (node == root) {
				return;
			}

			//check that from node to root, all owners are right

			if (root->get_scene_inherited_state().is_valid()) {
				accept->set_text(TTR("Can't reparent nodes in inherited scenes, order of nodes can't change."));
				accept->popup_centered();
				return;
			}

			if (node->get_owner() != root) {
				accept->set_text(TTR("Node must belong to the edited scene to become root."));
				accept->popup_centered();
				return;
			}

			if (node->get_filename() != String()) {
				accept->set_text(TTR("Instantiated scenes can't become root"));
				accept->popup_centered();
				return;
			}

			editor_data->get_undo_redo().create_action(TTR("Make node as Root"));
			editor_data->get_undo_redo().add_do_method(node->get_parent(), "remove_child", node);
			editor_data->get_undo_redo().add_do_method(editor, "set_edited_scene", node);
			editor_data->get_undo_redo().add_do_method(node, "add_child", root);
			editor_data->get_undo_redo().add_do_method(node, "set_filename", root->get_filename());
			editor_data->get_undo_redo().add_do_method(root, "set_filename", String());
			editor_data->get_undo_redo().add_do_method(node, "set_owner", (Object *)nullptr);
			editor_data->get_undo_redo().add_do_method(root, "set_owner", node);
			_node_replace_owner(root, root, node, MODE_DO);

			editor_data->get_undo_redo().add_undo_method(root, "set_filename", root->get_filename());
			editor_data->get_undo_redo().add_undo_method(node, "set_filename", String());
			editor_data->get_undo_redo().add_undo_method(node, "remove_child", root);
			editor_data->get_undo_redo().add_undo_method(editor, "set_edited_scene", root);
			editor_data->get_undo_redo().add_undo_method(node->get_parent(), "add_child", node);
			editor_data->get_undo_redo().add_undo_method(node->get_parent(), "move_child", node, node->get_index());
			editor_data->get_undo_redo().add_undo_method(root, "set_owner", (Object *)nullptr);
			editor_data->get_undo_redo().add_undo_method(node, "set_owner", root);
			_node_replace_owner(root, root, root, MODE_UNDO);

			editor_data->get_undo_redo().add_do_method(scene_tree, "update_tree");
			editor_data->get_undo_redo().add_undo_method(scene_tree, "update_tree");
			editor_data->get_undo_redo().commit_action();
		} break;
		case TOOL_MULTI_EDIT: {
			if (!profile_allow_editing) {
				break;
			}

			Node *root = EditorNode::get_singleton()->get_edited_scene();
			if (!root) {
				break;
			}
			Ref<MultiNodeEdit> mne = memnew(MultiNodeEdit);
			for (const Map<Node *, Object *>::Element *E = EditorNode::get_singleton()->get_editor_selection()->get_selection().front(); E; E = E->next()) {
				mne->add_node(root->get_path_to(E->key()));
			}

			EditorNode::get_singleton()->push_item(mne.ptr());

		} break;

		case TOOL_ERASE: {
			if (!profile_allow_editing) {
				break;
			}

			List<Node *> remove_list = editor_selection->get_selected_node_list();

			if (remove_list.is_empty()) {
				return;
			}

			if (!_validate_no_foreign()) {
				break;
			}

			if (p_confirm_override) {
				_delete_confirm();

			} else {
				String msg;
				if (remove_list.size() > 1) {
					bool any_children = false;
					for (int i = 0; !any_children && i < remove_list.size(); i++) {
						any_children = remove_list[i]->get_child_count() > 0;
					}

					msg = vformat(any_children ? TTR("Delete %d nodes and any children?") : TTR("Delete %d nodes?"), remove_list.size());
				} else {
					Node *node = remove_list[0];
					if (node == editor_data->get_edited_scene_root()) {
						msg = vformat(TTR("Delete the root node \"%s\"?"), node->get_name());
					} else if (node->get_filename() == "" && node->get_child_count() > 0) {
						// Display this message only for non-instanced scenes
						msg = vformat(TTR("Delete node \"%s\" and its children?"), node->get_name());
					} else {
						msg = vformat(TTR("Delete node \"%s\"?"), node->get_name());
					}
				}

				delete_dialog->set_text(msg);

				// Resize the dialog to its minimum size.
				// This prevents the dialog from being too wide after displaying
				// a deletion confirmation for a node with a long name.
				delete_dialog->set_size(Size2());
				delete_dialog->popup_centered();
			}

		} break;
		case TOOL_NEW_SCENE_FROM: {
			if (!profile_allow_editing) {
				break;
			}

			Node *scene = editor_data->get_edited_scene_root();

			if (!scene) {
				accept->set_text(TTR("This operation can't be done without a scene."));
				accept->popup_centered();
				break;
			}

			List<Node *> selection = editor_selection->get_selected_node_list();

			if (selection.size() != 1) {
				accept->set_text(TTR("This operation requires a single selected node."));
				accept->popup_centered();
				break;
			}

			Node *tocopy = selection.front()->get();

			if (tocopy == scene) {
				accept->set_text(TTR("Can not perform with the root node."));
				accept->popup_centered();
				break;
			}

			if (tocopy != editor_data->get_edited_scene_root() && tocopy->get_filename() != "") {
				accept->set_text(TTR("This operation can't be done on instanced scenes."));
				accept->popup_centered();
				break;
			}

			new_scene_from_dialog->set_file_mode(EditorFileDialog::FILE_MODE_SAVE_FILE);

			List<String> extensions;
			Ref<PackedScene> sd = memnew(PackedScene);
			ResourceSaver::get_recognized_extensions(sd, &extensions);
			new_scene_from_dialog->clear_filters();
			for (int i = 0; i < extensions.size(); i++) {
				new_scene_from_dialog->add_filter("*." + extensions[i] + " ; " + extensions[i].to_upper());
			}

			String existing;
			if (extensions.size()) {
				String root_name(tocopy->get_name());
				existing = root_name + "." + extensions.front()->get().to_lower();
			}
			new_scene_from_dialog->set_current_path(existing);

			new_scene_from_dialog->set_title(TTR("Save New Scene As..."));
			new_scene_from_dialog->popup_file_dialog();
		} break;
		case TOOL_COPY_NODE_PATH: {
			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node) {
					Node *root = EditorNode::get_singleton()->get_edited_scene();
					NodePath path = root->get_path().rel_path_to(node->get_path());
					DisplayServer::get_singleton()->clipboard_set(path);
				}
			}
		} break;
		case TOOL_OPEN_DOCUMENTATION: {
			List<Node *> selection = editor_selection->get_selected_node_list();
			for (int i = 0; i < selection.size(); i++) {
				ScriptEditor::get_singleton()->goto_help("class_name:" + selection[i]->get_class());
			}
			EditorNode::get_singleton()->set_visible_editor(EditorNode::EDITOR_SCRIPT);
		} break;
		case TOOL_SCENE_EDITABLE_CHILDREN: {
			if (!profile_allow_editing) {
				break;
			}

			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node) {
					bool editable = EditorNode::get_singleton()->get_edited_scene()->is_editable_instance(node);

					if (editable) {
						editable_instance_remove_dialog->set_text(TTR("Disabling \"editable_instance\" will cause all properties of the node to be reverted to their default."));
						editable_instance_remove_dialog->popup_centered();
						break;
					}
					_toggle_editable_children(node);
				}
			}
		} break;
		case TOOL_SCENE_USE_PLACEHOLDER: {
			if (!profile_allow_editing) {
				break;
			}

			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node) {
					bool editable = EditorNode::get_singleton()->get_edited_scene()->is_editable_instance(node);
					bool placeholder = node->get_scene_instance_load_placeholder();

					// Fire confirmation dialog when children are editable.
					if (editable && !placeholder) {
						placeholder_editable_instance_remove_dialog->set_text(TTR("Enabling \"Load As Placeholder\" will disable \"Editable Children\" and cause all properties of the node to be reverted to their default."));
						placeholder_editable_instance_remove_dialog->popup_centered();
						break;
					}

					placeholder = !placeholder;

					if (placeholder) {
						EditorNode::get_singleton()->get_edited_scene()->set_editable_instance(node, false);
					}

					node->set_scene_instance_load_placeholder(placeholder);
					scene_tree->update_tree();
				}
			}
		} break;
		case TOOL_SCENE_MAKE_LOCAL: {
			if (!profile_allow_editing) {
				break;
			}

			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node) {
					Node *root = EditorNode::get_singleton()->get_edited_scene();
					UndoRedo *undo_redo = &editor_data->get_undo_redo();
					if (!root) {
						break;
					}

					ERR_FAIL_COND(node->get_filename() == String());
					undo_redo->create_action(TTR("Make Local"));
					undo_redo->add_do_method(node, "set_filename", "");
					undo_redo->add_undo_method(node, "set_filename", node->get_filename());
					_node_replace_owner(node, node, root);
					undo_redo->add_do_method(scene_tree, "update_tree");
					undo_redo->add_undo_method(scene_tree, "update_tree");
					undo_redo->commit_action();
				}
			}
		} break;
		case TOOL_SCENE_OPEN: {
			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node) {
					scene_tree->emit_signal("open", node->get_filename());
				}
			}
		} break;
		case TOOL_SCENE_CLEAR_INHERITANCE: {
			if (!profile_allow_editing) {
				break;
			}

			clear_inherit_confirm->popup_centered();
		} break;
		case TOOL_SCENE_CLEAR_INHERITANCE_CONFIRM: {
			if (!profile_allow_editing) {
				break;
			}

			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node) {
					node->set_scene_inherited_state(Ref<SceneState>());
					scene_tree->update_tree();
					EditorNode::get_singleton()->get_inspector()->update_tree();
				}
			}
		} break;
		case TOOL_SCENE_OPEN_INHERITED: {
			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node && node->get_scene_inherited_state().is_valid()) {
					scene_tree->emit_signal("open", node->get_scene_inherited_state()->get_path());
				}
			}
		} break;
		case TOOL_CREATE_2D_SCENE:
		case TOOL_CREATE_3D_SCENE:
		case TOOL_CREATE_USER_INTERFACE:
		case TOOL_CREATE_FAVORITE: {
			Node *new_node = nullptr;

			if (TOOL_CREATE_FAVORITE == p_tool) {
				String name = selected_favorite_root.get_slicec(' ', 0);
				if (ScriptServer::is_global_class(name)) {
					new_node = Object::cast_to<Node>(ClassDB::instance(ScriptServer::get_global_class_native_base(name)));
					Ref<Script> script = ResourceLoader::load(ScriptServer::get_global_class_path(name), "Script");
					if (new_node && script.is_valid()) {
						new_node->set_script(script);
						new_node->set_name(name);
					}
				} else {
					new_node = Object::cast_to<Node>(ClassDB::instance(selected_favorite_root));
				}

				if (!new_node) {
					new_node = memnew(Node);
					ERR_PRINT("Creating root from favorite '" + selected_favorite_root + "' failed. Creating 'Node' instead.");
				}
			} else {
				switch (p_tool) {
					case TOOL_CREATE_2D_SCENE:
						new_node = memnew(Node2D);
						break;
					case TOOL_CREATE_3D_SCENE:
						new_node = memnew(Node3D);
						break;
					case TOOL_CREATE_USER_INTERFACE: {
						Control *node = memnew(Control);
						node->set_anchors_and_offsets_preset(PRESET_WIDE); //more useful for resizable UIs.
						new_node = node;

					} break;
				}
			}

			editor_data->get_undo_redo().create_action(TTR("New Scene Root"));
			editor_data->get_undo_redo().add_do_method(editor, "set_edited_scene", new_node);
			editor_data->get_undo_redo().add_do_method(scene_tree, "update_tree");
			editor_data->get_undo_redo().add_do_reference(new_node);
			editor_data->get_undo_redo().add_undo_method(editor, "set_edited_scene", (Object *)nullptr);
			editor_data->get_undo_redo().commit_action();

			editor->edit_node(new_node);
			editor_selection->clear();
			editor_selection->add_node(new_node);

		} break;

		default: {
			if (p_tool >= EDIT_SUBRESOURCE_BASE) {
				int idx = p_tool - EDIT_SUBRESOURCE_BASE;

				ERR_FAIL_INDEX(idx, subresources.size());

				Object *obj = ObjectDB::get_instance(subresources[idx]);
				ERR_FAIL_COND(!obj);

				editor->push_item(obj);
			}
		}
	}
}

void SceneTreeDock::_node_collapsed(Object *p_obj) {
	TreeItem *ti = Object::cast_to<TreeItem>(p_obj);
	if (!ti) {
		return;
	}

	if (Input::get_singleton()->is_key_pressed(KEY_SHIFT)) {
		_set_collapsed_recursive(ti, ti->is_collapsed());
	}
}

void SceneTreeDock::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_READY: {
			if (!first_enter) {
				break;
			}
			first_enter = false;

			EditorFeatureProfileManager::get_singleton()->connect("current_feature_profile_changed", callable_mp(this, &SceneTreeDock::_feature_profile_changed));

			CanvasItemEditorPlugin *canvas_item_plugin = Object::cast_to<CanvasItemEditorPlugin>(editor_data->get_editor("2D"));
			if (canvas_item_plugin) {
				canvas_item_plugin->get_canvas_item_editor()->connect("item_lock_status_changed", Callable(scene_tree, "_update_tree"));
				canvas_item_plugin->get_canvas_item_editor()->connect("item_group_status_changed", Callable(scene_tree, "_update_tree"));
				scene_tree->connect("node_changed", callable_mp((CanvasItem *)canvas_item_plugin->get_canvas_item_editor()->get_viewport_control(), &CanvasItem::update));
			}

			Node3DEditorPlugin *spatial_editor_plugin = Object::cast_to<Node3DEditorPlugin>(editor_data->get_editor("3D"));
			spatial_editor_plugin->get_spatial_editor()->connect("item_lock_status_changed", Callable(scene_tree, "_update_tree"));
			spatial_editor_plugin->get_spatial_editor()->connect("item_group_status_changed", Callable(scene_tree, "_update_tree"));

			button_add->set_icon(get_theme_icon("Add", "EditorIcons"));
			button_instance->set_icon(get_theme_icon("Instance", "EditorIcons"));
			button_create_script->set_icon(get_theme_icon("ScriptCreate", "EditorIcons"));
			button_detach_script->set_icon(get_theme_icon("ScriptRemove", "EditorIcons"));

			filter->set_right_icon(get_theme_icon("Search", "EditorIcons"));
			filter->set_clear_button_enabled(true);

			EditorNode::get_singleton()->get_editor_selection()->connect("selection_changed", callable_mp(this, &SceneTreeDock::_selection_changed));
			scene_tree->get_scene_tree()->connect("item_collapsed", callable_mp(this, &SceneTreeDock::_node_collapsed));

			// create_root_dialog
			HBoxContainer *top_row = memnew(HBoxContainer);
			top_row->set_name("NodeShortcutsTopRow");
			top_row->set_h_size_flags(SIZE_EXPAND_FILL);
			top_row->add_child(memnew(Label(TTR("Create Root Node:"))));
			top_row->add_spacer();

			Button *node_shortcuts_toggle = memnew(Button);
			node_shortcuts_toggle->set_flat(true);
			node_shortcuts_toggle->set_name("NodeShortcutsToggle");
			node_shortcuts_toggle->set_icon(get_theme_icon("Favorites", "EditorIcons"));
			node_shortcuts_toggle->set_toggle_mode(true);
			node_shortcuts_toggle->set_tooltip(TTR("Switch to Favorite Nodes"));
			node_shortcuts_toggle->set_pressed(EDITOR_GET("_use_favorites_root_selection"));
			node_shortcuts_toggle->set_anchors_and_offsets_preset(Control::PRESET_CENTER_RIGHT);
			node_shortcuts_toggle->connect("pressed", callable_mp(this, &SceneTreeDock::_update_create_root_dialog));
			top_row->add_child(node_shortcuts_toggle);

			create_root_dialog->add_child(top_row);

			VBoxContainer *node_shortcuts = memnew(VBoxContainer);
			node_shortcuts->set_name("NodeShortcuts");

			VBoxContainer *beginner_node_shortcuts = memnew(VBoxContainer);
			beginner_node_shortcuts->set_name("BeginnerNodeShortcuts");
			node_shortcuts->add_child(beginner_node_shortcuts);

			button_2d = memnew(Button);
			beginner_node_shortcuts->add_child(button_2d);
			button_2d->set_text(TTR("2D Scene"));
			button_2d->set_icon(get_theme_icon("Node2D", "EditorIcons"));
			button_2d->connect("pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_CREATE_2D_SCENE, false));

			button_3d = memnew(Button);
			beginner_node_shortcuts->add_child(button_3d);
			button_3d->set_text(TTR("3D Scene"));
			button_3d->set_icon(get_theme_icon("Node3D", "EditorIcons"));
			button_3d->connect("pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_CREATE_3D_SCENE, false));

			button_ui = memnew(Button);
			beginner_node_shortcuts->add_child(button_ui);
			button_ui->set_text(TTR("User Interface"));
			button_ui->set_icon(get_theme_icon("Control", "EditorIcons"));
			button_ui->connect("pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_CREATE_USER_INTERFACE, false));

			VBoxContainer *favorite_node_shortcuts = memnew(VBoxContainer);
			favorite_node_shortcuts->set_name("FavoriteNodeShortcuts");
			node_shortcuts->add_child(favorite_node_shortcuts);

			button_custom = memnew(Button);
			node_shortcuts->add_child(button_custom);
			button_custom->set_text(TTR("Other Node"));
			button_custom->set_icon(get_theme_icon("Add", "EditorIcons"));
			button_custom->connect("pressed", callable_bind(callable_mp(this, &SceneTreeDock::_tool_selected), TOOL_NEW, false));

			node_shortcuts->add_spacer();
			create_root_dialog->add_child(node_shortcuts);
			_update_create_root_dialog();
		} break;

		case NOTIFICATION_ENTER_TREE: {
			clear_inherit_confirm->connect("confirmed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_SCENE_CLEAR_INHERITANCE_CONFIRM, false));
		} break;

		case NOTIFICATION_EXIT_TREE: {
			clear_inherit_confirm->disconnect("confirmed", callable_mp(this, &SceneTreeDock::_tool_selected));
		} break;
		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			button_add->set_icon(get_theme_icon("Add", "EditorIcons"));
			button_instance->set_icon(get_theme_icon("Instance", "EditorIcons"));
			button_create_script->set_icon(get_theme_icon("ScriptCreate", "EditorIcons"));
			button_detach_script->set_icon(get_theme_icon("ScriptRemove", "EditorIcons"));
			button_2d->set_icon(get_theme_icon("Node2D", "EditorIcons"));
			button_3d->set_icon(get_theme_icon("Node3D", "EditorIcons"));
			button_ui->set_icon(get_theme_icon("Control", "EditorIcons"));
			button_custom->set_icon(get_theme_icon("Add", "EditorIcons"));

			filter->set_right_icon(get_theme_icon("Search", "EditorIcons"));
			filter->set_clear_button_enabled(true);
		} break;
		case NOTIFICATION_PROCESS: {
			bool show_create_root = bool(EDITOR_GET("interface/editors/show_scene_tree_root_selection")) && get_tree()->get_edited_scene_root() == nullptr;

			if (show_create_root != create_root_dialog->is_visible_in_tree() && !remote_tree->is_visible()) {
				if (show_create_root) {
					create_root_dialog->show();
					scene_tree->hide();
				} else {
					create_root_dialog->hide();
					scene_tree->show();
				}
			}

		} break;
	}
}

void SceneTreeDock::_node_replace_owner(Node *p_base, Node *p_node, Node *p_root, ReplaceOwnerMode p_mode) {
	if (p_node->get_owner() == p_base && p_node != p_root) {
		UndoRedo *undo_redo = &editor_data->get_undo_redo();
		switch (p_mode) {
			case MODE_BIDI: {
				undo_redo->add_do_method(p_node, "set_owner", p_root);
				undo_redo->add_undo_method(p_node, "set_owner", p_base);

			} break;
			case MODE_DO: {
				undo_redo->add_do_method(p_node, "set_owner", p_root);

			} break;
			case MODE_UNDO: {
				undo_redo->add_undo_method(p_node, "set_owner", p_root);

			} break;
		}
	}

	for (int i = 0; i < p_node->get_child_count(); i++) {
		_node_replace_owner(p_base, p_node->get_child(i), p_root, p_mode);
	}
}

void SceneTreeDock::_load_request(const String &p_path) {
	editor->open_request(p_path);
}

void SceneTreeDock::_script_open_request(const Ref<Script> &p_script) {
	editor->edit_resource(p_script);
}

void SceneTreeDock::_node_selected() {
	Node *node = scene_tree->get_selected();

	if (!node) {
		return;
	}

	if (ScriptEditor::get_singleton()->is_visible_in_tree()) {
		restore_script_editor_on_drag = true;
	}

	editor->push_item(node);
}

void SceneTreeDock::_node_renamed() {
	_node_selected();
}

void SceneTreeDock::_set_owners(Node *p_owner, const Array &p_nodes) {
	for (int i = 0; i < p_nodes.size(); i++) {
		Node *n = Object::cast_to<Node>(p_nodes[i]);
		if (!n) {
			continue;
		}
		n->set_owner(p_owner);
	}
}

void SceneTreeDock::_fill_path_renames(Vector<StringName> base_path, Vector<StringName> new_base_path, Node *p_node, List<Pair<NodePath, NodePath>> *p_renames) {
	base_path.push_back(p_node->get_name());
	if (new_base_path.size()) {
		new_base_path.push_back(p_node->get_name());
	}

	NodePath from(base_path, true);
	NodePath to;
	if (new_base_path.size()) {
		to = NodePath(new_base_path, true);
	}

	Pair<NodePath, NodePath> npp;
	npp.first = from;
	npp.second = to;

	p_renames->push_back(npp);

	for (int i = 0; i < p_node->get_child_count(); i++) {
		_fill_path_renames(base_path, new_base_path, p_node->get_child(i), p_renames);
	}
}

void SceneTreeDock::fill_path_renames(Node *p_node, Node *p_new_parent, List<Pair<NodePath, NodePath>> *p_renames) {
	Vector<StringName> base_path;
	Node *n = p_node->get_parent();
	while (n) {
		base_path.push_back(n->get_name());
		n = n->get_parent();
	}
	base_path.invert();

	Vector<StringName> new_base_path;
	if (p_new_parent) {
		n = p_new_parent;
		while (n) {
			new_base_path.push_back(n->get_name());
			n = n->get_parent();
		}

		new_base_path.invert();
	}

	_fill_path_renames(base_path, new_base_path, p_node, p_renames);
}

void SceneTreeDock::perform_node_renames(Node *p_base, List<Pair<NodePath, NodePath>> *p_renames, Map<Ref<Animation>, Set<int>> *r_rem_anims) {
	Map<Ref<Animation>, Set<int>> rem_anims;

	if (!r_rem_anims) {
		r_rem_anims = &rem_anims;
	}

	if (!p_base) {
		p_base = edited_scene;
	}

	if (!p_base) {
		return;
	}

	// Renaming node paths used in script instances
	if (p_base->get_script_instance()) {
		ScriptInstance *si = p_base->get_script_instance();

		if (si) {
			List<PropertyInfo> properties;
			si->get_property_list(&properties);
			NodePath root_path = p_base->get_path();

			for (List<PropertyInfo>::Element *E = properties.front(); E; E = E->next()) {
				String propertyname = E->get().name;
				Variant p = p_base->get(propertyname);
				if (p.get_type() == Variant::NODE_PATH) {
					NodePath root_path_new = root_path;
					for (List<Pair<NodePath, NodePath>>::Element *F = p_renames->front(); F; F = F->next()) {
						if (root_path == F->get().first) {
							root_path_new = F->get().second;
							break;
						}
					}

					// Goes through all paths to check if its matching
					for (List<Pair<NodePath, NodePath>>::Element *F = p_renames->front(); F; F = F->next()) {
						NodePath rel_path_old = root_path.rel_path_to(F->get().first);

						// if old path detected, then it needs to be replaced with the new one
						if (p == rel_path_old) {
							NodePath rel_path_new = F->get().second;

							// if not empty, get new relative path
							if (!rel_path_new.is_empty()) {
								rel_path_new = root_path_new.rel_path_to(F->get().second);
							}

							editor_data->get_undo_redo().add_do_property(p_base, propertyname, rel_path_new);
							editor_data->get_undo_redo().add_undo_property(p_base, propertyname, rel_path_old);

							p_base->set(propertyname, rel_path_new);
							break;
						}

						// update the node itself if it has a valid node path and has not been deleted
						if (root_path == F->get().first && p != NodePath() && F->get().second != NodePath()) {
							NodePath abs_path = NodePath(String(root_path).plus_file(p)).simplified();
							NodePath rel_path_new = F->get().second.rel_path_to(abs_path);

							editor_data->get_undo_redo().add_do_property(p_base, propertyname, rel_path_new);
							editor_data->get_undo_redo().add_undo_property(p_base, propertyname, p);

							p_base->set(propertyname, rel_path_new);
						}
					}
				}
			}
		}
	}

	bool autorename_animation_tracks = bool(EDITOR_DEF("editors/animation/autorename_animation_tracks", true));

	if (autorename_animation_tracks && Object::cast_to<AnimationPlayer>(p_base)) {
		AnimationPlayer *ap = Object::cast_to<AnimationPlayer>(p_base);
		List<StringName> anims;
		ap->get_animation_list(&anims);
		Node *root = ap->get_node(ap->get_root());

		if (root) {
			NodePath root_path = root->get_path();
			NodePath new_root_path = root_path;

			for (List<Pair<NodePath, NodePath>>::Element *E = p_renames->front(); E; E = E->next()) {
				if (E->get().first == root_path) {
					new_root_path = E->get().second;
					break;
				}
			}

			if (new_root_path != NodePath()) {
				//will not be erased

				for (List<StringName>::Element *E = anims.front(); E; E = E->next()) {
					Ref<Animation> anim = ap->get_animation(E->get());
					if (!r_rem_anims->has(anim)) {
						r_rem_anims->insert(anim, Set<int>());
						Set<int> &ran = r_rem_anims->find(anim)->get();
						for (int i = 0; i < anim->get_track_count(); i++) {
							ran.insert(i);
						}
					}

					Set<int> &ran = r_rem_anims->find(anim)->get();

					if (anim.is_null()) {
						continue;
					}

					for (int i = 0; i < anim->get_track_count(); i++) {
						NodePath track_np = anim->track_get_path(i);
						Node *n = root->get_node(track_np);
						if (!n) {
							continue;
						}

						NodePath old_np = n->get_path();

						if (!ran.has(i)) {
							continue; //channel was removed
						}

						for (List<Pair<NodePath, NodePath>>::Element *F = p_renames->front(); F; F = F->next()) {
							if (F->get().first == old_np) {
								if (F->get().second == NodePath()) {
									//will be erased

									int idx = 0;
									Set<int>::Element *EI = ran.front();
									ERR_FAIL_COND(!EI); //bug
									while (EI->get() != i) {
										idx++;
										EI = EI->next();
										ERR_FAIL_COND(!EI); //another bug
									}

									editor_data->get_undo_redo().add_do_method(anim.ptr(), "remove_track", idx);
									editor_data->get_undo_redo().add_undo_method(anim.ptr(), "add_track", anim->track_get_type(i), idx);
									editor_data->get_undo_redo().add_undo_method(anim.ptr(), "track_set_path", idx, track_np);
									editor_data->get_undo_redo().add_undo_method(anim.ptr(), "track_set_interpolation_type", idx, anim->track_get_interpolation_type(i));
									for (int j = 0; j < anim->track_get_key_count(i); j++) {
										editor_data->get_undo_redo().add_undo_method(anim.ptr(), "track_insert_key", idx, anim->track_get_key_time(i, j), anim->track_get_key_value(i, j), anim->track_get_key_transition(i, j));
									}

									ran.erase(i); //byebye channel

								} else {
									//will be renamed
									NodePath rel_path = new_root_path.rel_path_to(F->get().second);

									NodePath new_path = NodePath(rel_path.get_names(), track_np.get_subnames(), false);
									if (new_path == track_np) {
										continue; //bleh
									}
									editor_data->get_undo_redo().add_do_method(anim.ptr(), "track_set_path", i, new_path);
									editor_data->get_undo_redo().add_undo_method(anim.ptr(), "track_set_path", i, track_np);
								}
							}
						}
					}
				}
			}
		}
	}

	for (int i = 0; i < p_base->get_child_count(); i++) {
		perform_node_renames(p_base->get_child(i), p_renames, r_rem_anims);
	}
}

void SceneTreeDock::_node_prerenamed(Node *p_node, const String &p_new_name) {
	List<Pair<NodePath, NodePath>> path_renames;

	Vector<StringName> base_path;
	Node *n = p_node->get_parent();
	while (n) {
		base_path.push_back(n->get_name());
		n = n->get_parent();
	}
	base_path.invert();

	Vector<StringName> new_base_path = base_path;
	base_path.push_back(p_node->get_name());

	new_base_path.push_back(p_new_name);

	Pair<NodePath, NodePath> npp;
	npp.first = NodePath(base_path, true);
	npp.second = NodePath(new_base_path, true);
	path_renames.push_back(npp);

	for (int i = 0; i < p_node->get_child_count(); i++) {
		_fill_path_renames(base_path, new_base_path, p_node->get_child(i), &path_renames);
	}

	perform_node_renames(nullptr, &path_renames);
}

bool SceneTreeDock::_validate_no_foreign() {
	List<Node *> selection = editor_selection->get_selected_node_list();

	for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
		if (E->get() != edited_scene && E->get()->get_owner() != edited_scene) {
			accept->set_text(TTR("Can't operate on nodes from a foreign scene!"));
			accept->popup_centered();
			return false;
		}

		// When edited_scene inherits from another one the root Node will be the parent Scene,
		// we don't want to consider that Node a foreign one otherwise we would not be able to
		// delete it.
		if (edited_scene->get_scene_inherited_state().is_valid() && edited_scene == E->get()) {
			continue;
		}

		if (edited_scene->get_scene_inherited_state().is_valid() && edited_scene->get_scene_inherited_state()->find_node_by_path(edited_scene->get_path_to(E->get())) >= 0) {
			accept->set_text(TTR("Can't operate on nodes the current scene inherits from!"));
			accept->popup_centered();
			return false;
		}
	}

	return true;
}

bool SceneTreeDock::_validate_no_instance() {
	List<Node *> selection = editor_selection->get_selected_node_list();

	for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
		if (E->get() != edited_scene && E->get()->get_filename() != "") {
			accept->set_text(TTR("This operation can't be done on instanced scenes."));
			accept->popup_centered();
			return false;
		}
	}

	return true;
}

void SceneTreeDock::_node_reparent(NodePath p_path, bool p_keep_global_xform) {
	Node *new_parent = scene_root->get_node(p_path);
	ERR_FAIL_COND(!new_parent);

	List<Node *> selection = editor_selection->get_selected_node_list();

	if (selection.is_empty()) {
		return; // Nothing to reparent.
	}

	Vector<Node *> nodes;

	for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
		nodes.push_back(E->get());
	}

	_do_reparent(new_parent, -1, nodes, p_keep_global_xform);
}

void SceneTreeDock::_do_reparent(Node *p_new_parent, int p_position_in_parent, Vector<Node *> p_nodes, bool p_keep_global_xform) {
	Node *new_parent = p_new_parent;
	ERR_FAIL_COND(!new_parent);

	if (p_nodes.size() == 0) {
		return; // Nothing to reparent.
	}

	p_nodes.sort_custom<Node::Comparator>(); //Makes result reliable.

	bool no_change = true;
	for (int ni = 0; ni < p_nodes.size(); ni++) {
		if (p_nodes[ni] == p_new_parent) {
			return; // Attempt to reparent to itself.
		}

		if (p_nodes[ni]->get_parent() != p_new_parent || p_position_in_parent + ni != p_nodes[ni]->get_index()) {
			no_change = false;
		}
	}

	if (no_change) {
		return; // Position and parent didn't change.
	}

	Node *validate = new_parent;
	while (validate) {
		ERR_FAIL_COND_MSG(p_nodes.find(validate) != -1, "Selection changed at some point. Can't reparent.");
		validate = validate->get_parent();
	}

	// Sort by tree order, so re-adding is easy.
	p_nodes.sort_custom<Node::Comparator>();

	editor_data->get_undo_redo().create_action(TTR("Reparent Node"));

	List<Pair<NodePath, NodePath>> path_renames;
	Vector<StringName> former_names;

	int inc = 0;

	for (int ni = 0; ni < p_nodes.size(); ni++) {
		// No undo implemented for this yet.
		Node *node = p_nodes[ni];

		fill_path_renames(node, new_parent, &path_renames);
		former_names.push_back(node->get_name());

		List<Node *> owned;
		node->get_owned_by(node->get_owner(), &owned);
		Array owners;
		for (List<Node *>::Element *E = owned.front(); E; E = E->next()) {
			owners.push_back(E->get());
		}

		if (new_parent == node->get_parent() && node->get_index() < p_position_in_parent + ni) {
			inc--; // If the child will generate a gap when moved, adjust.
		}

		editor_data->get_undo_redo().add_do_method(node->get_parent(), "remove_child", node);
		editor_data->get_undo_redo().add_do_method(new_parent, "add_child", node);

		if (p_position_in_parent >= 0) {
			editor_data->get_undo_redo().add_do_method(new_parent, "move_child", node, p_position_in_parent + inc);
		}

		EditorDebuggerNode *ed = EditorDebuggerNode::get_singleton();
		String old_name = former_names[ni];
		String new_name = new_parent->validate_child_name(node);

		// Name was modified, fix the path renames.
		if (old_name.casecmp_to(new_name) != 0) {
			// Fix the to name to have the new name.
			NodePath old_new_name = path_renames[ni].second;
			NodePath new_path;

			Vector<StringName> unfixed_new_names = old_new_name.get_names();
			Vector<StringName> fixed_new_names;

			// Get last name and replace with fixed new name.
			for (int a = 0; a < (unfixed_new_names.size() - 1); a++) {
				fixed_new_names.push_back(unfixed_new_names[a]);
			}
			fixed_new_names.push_back(new_name);

			NodePath fixed_node_path = NodePath(fixed_new_names, true);

			path_renames[ni].second = fixed_node_path;
		}

		editor_data->get_undo_redo().add_do_method(ed, "live_debug_reparent_node", edited_scene->get_path_to(node), edited_scene->get_path_to(new_parent), new_name, p_position_in_parent + inc);
		editor_data->get_undo_redo().add_undo_method(ed, "live_debug_reparent_node", NodePath(String(edited_scene->get_path_to(new_parent)).plus_file(new_name)), edited_scene->get_path_to(node->get_parent()), node->get_name(), node->get_index());

		if (p_keep_global_xform) {
			if (Object::cast_to<Node2D>(node)) {
				editor_data->get_undo_redo().add_do_method(node, "set_global_transform", Object::cast_to<Node2D>(node)->get_global_transform());
			}
			if (Object::cast_to<Node3D>(node)) {
				editor_data->get_undo_redo().add_do_method(node, "set_global_transform", Object::cast_to<Node3D>(node)->get_global_transform());
			}
			if (Object::cast_to<Control>(node)) {
				editor_data->get_undo_redo().add_do_method(node, "set_global_position", Object::cast_to<Control>(node)->get_global_position());
			}
		}

		editor_data->get_undo_redo().add_do_method(this, "_set_owners", edited_scene, owners);

		if (AnimationPlayerEditor::singleton->get_track_editor()->get_root() == node) {
			editor_data->get_undo_redo().add_do_method(AnimationPlayerEditor::singleton->get_track_editor(), "set_root", node);
		}

		editor_data->get_undo_redo().add_undo_method(new_parent, "remove_child", node);
		editor_data->get_undo_redo().add_undo_method(node, "set_name", former_names[ni]);

		inc++;
	}

	// Add and move in a second step (so old order is preserved).
	for (int ni = 0; ni < p_nodes.size(); ni++) {
		Node *node = p_nodes[ni];

		List<Node *> owned;
		node->get_owned_by(node->get_owner(), &owned);
		Array owners;
		for (List<Node *>::Element *E = owned.front(); E; E = E->next()) {
			owners.push_back(E->get());
		}

		int child_pos = node->get_index();

		editor_data->get_undo_redo().add_undo_method(node->get_parent(), "add_child", node);
		editor_data->get_undo_redo().add_undo_method(node->get_parent(), "move_child", node, child_pos);
		editor_data->get_undo_redo().add_undo_method(this, "_set_owners", edited_scene, owners);
		if (AnimationPlayerEditor::singleton->get_track_editor()->get_root() == node) {
			editor_data->get_undo_redo().add_undo_method(AnimationPlayerEditor::singleton->get_track_editor(), "set_root", node);
		}

		if (p_keep_global_xform) {
			if (Object::cast_to<Node2D>(node)) {
				editor_data->get_undo_redo().add_undo_method(node, "set_transform", Object::cast_to<Node2D>(node)->get_transform());
			}
			if (Object::cast_to<Node3D>(node)) {
				editor_data->get_undo_redo().add_undo_method(node, "set_transform", Object::cast_to<Node3D>(node)->get_transform());
			}
			if (Object::cast_to<Control>(node)) {
				editor_data->get_undo_redo().add_undo_method(node, "set_position", Object::cast_to<Control>(node)->get_position());
			}
		}
	}

	perform_node_renames(nullptr, &path_renames);

	editor_data->get_undo_redo().commit_action();
}

bool SceneTreeDock::_is_collapsed_recursive(TreeItem *p_item) const {
	bool is_branch_collapsed = false;

	List<TreeItem *> needs_check;
	needs_check.push_back(p_item);

	while (!needs_check.is_empty()) {
		TreeItem *item = needs_check.back()->get();
		needs_check.pop_back();

		TreeItem *child = item->get_children();
		is_branch_collapsed = item->is_collapsed() && child;

		if (is_branch_collapsed) {
			break;
		}
		while (child) {
			needs_check.push_back(child);
			child = child->get_next();
		}
	}
	return is_branch_collapsed;
}

void SceneTreeDock::_set_collapsed_recursive(TreeItem *p_item, bool p_collapsed) {
	List<TreeItem *> to_collapse;
	to_collapse.push_back(p_item);

	while (!to_collapse.is_empty()) {
		TreeItem *item = to_collapse.back()->get();
		to_collapse.pop_back();

		item->set_collapsed(p_collapsed);

		TreeItem *child = item->get_children();
		while (child) {
			to_collapse.push_back(child);
			child = child->get_next();
		}
	}
}

void SceneTreeDock::_script_created(Ref<Script> p_script) {
	List<Node *> selected = editor_selection->get_selected_node_list();

	if (selected.is_empty()) {
		return;
	}

	editor_data->get_undo_redo().create_action(TTR("Attach Script"));
	for (List<Node *>::Element *E = selected.front(); E; E = E->next()) {
		Ref<Script> existing = E->get()->get_script();
		editor_data->get_undo_redo().add_do_method(E->get(), "set_script", p_script);
		editor_data->get_undo_redo().add_undo_method(E->get(), "set_script", existing);
		editor_data->get_undo_redo().add_do_method(this, "_update_script_button");
		editor_data->get_undo_redo().add_undo_method(this, "_update_script_button");
	}

	editor_data->get_undo_redo().commit_action();

	editor->push_item(p_script.operator->());
	_update_script_button();
}

void SceneTreeDock::_script_creation_closed() {
	script_create_dialog->disconnect("script_created", callable_mp(this, &SceneTreeDock::_script_created));
	script_create_dialog->disconnect("confirmed", callable_mp(this, &SceneTreeDock::_script_creation_closed));
	script_create_dialog->disconnect("cancelled", callable_mp(this, &SceneTreeDock::_script_creation_closed));
}

void SceneTreeDock::_toggle_editable_children_from_selection() {
	List<Node *> selection = editor_selection->get_selected_node_list();
	List<Node *>::Element *e = selection.front();

	if (e) {
		_toggle_editable_children(e->get());
	}
}

void SceneTreeDock::_toggle_placeholder_from_selection() {
	List<Node *> selection = editor_selection->get_selected_node_list();
	List<Node *>::Element *e = selection.front();

	if (e) {
		Node *node = e->get();
		if (node) {
			_toggle_editable_children(node);

			bool placeholder = node->get_scene_instance_load_placeholder();
			placeholder = !placeholder;

			node->set_scene_instance_load_placeholder(placeholder);
			scene_tree->update_tree();
		}
	}
}

void SceneTreeDock::_toggle_editable_children(Node *p_node) {
	if (p_node) {
		bool editable = !EditorNode::get_singleton()->get_edited_scene()->is_editable_instance(p_node);
		EditorNode::get_singleton()->get_edited_scene()->set_editable_instance(p_node, editable);
		if (editable) {
			p_node->set_scene_instance_load_placeholder(false);
		}

		Node3DEditor::get_singleton()->update_all_gizmos(p_node);

		scene_tree->update_tree();
	}
}

void SceneTreeDock::_delete_confirm(bool p_cut) {
	List<Node *> remove_list = editor_selection->get_selected_node_list();

	if (remove_list.is_empty()) {
		return;
	}

	editor->get_editor_plugins_over()->make_visible(false);

	if (p_cut) {
		editor_data->get_undo_redo().create_action(TTR("Cut Node(s)"));
	} else {
		editor_data->get_undo_redo().create_action(TTR("Remove Node(s)"));
	}

	bool entire_scene = false;

	for (List<Node *>::Element *E = remove_list.front(); E; E = E->next()) {
		if (E->get() == edited_scene) {
			entire_scene = true;
		}
	}

	if (entire_scene) {
		editor_data->get_undo_redo().add_do_method(editor, "set_edited_scene", (Object *)nullptr);
		editor_data->get_undo_redo().add_undo_method(editor, "set_edited_scene", edited_scene);
		editor_data->get_undo_redo().add_undo_method(edited_scene, "set_owner", edited_scene->get_owner());
		editor_data->get_undo_redo().add_undo_method(scene_tree, "update_tree");
		editor_data->get_undo_redo().add_undo_reference(edited_scene);

	} else {
		remove_list.sort_custom<Node::Comparator>(); //sort nodes to keep positions
		List<Pair<NodePath, NodePath>> path_renames;

		//delete from animation
		for (List<Node *>::Element *E = remove_list.front(); E; E = E->next()) {
			Node *n = E->get();
			if (!n->is_inside_tree() || !n->get_parent()) {
				continue;
			}

			fill_path_renames(n, nullptr, &path_renames);
		}

		perform_node_renames(nullptr, &path_renames);
		//delete for read
		for (List<Node *>::Element *E = remove_list.front(); E; E = E->next()) {
			Node *n = E->get();
			if (!n->is_inside_tree() || !n->get_parent()) {
				continue;
			}

			List<Node *> owned;
			n->get_owned_by(n->get_owner(), &owned);
			Array owners;
			for (List<Node *>::Element *F = owned.front(); F; F = F->next()) {
				owners.push_back(F->get());
			}

			editor_data->get_undo_redo().add_do_method(n->get_parent(), "remove_child", n);
			editor_data->get_undo_redo().add_undo_method(n->get_parent(), "add_child", n);
			editor_data->get_undo_redo().add_undo_method(n->get_parent(), "move_child", n, n->get_index());
			if (AnimationPlayerEditor::singleton->get_track_editor()->get_root() == n) {
				editor_data->get_undo_redo().add_undo_method(AnimationPlayerEditor::singleton->get_track_editor(), "set_root", n);
			}
			editor_data->get_undo_redo().add_undo_method(this, "_set_owners", edited_scene, owners);
			editor_data->get_undo_redo().add_undo_reference(n);

			EditorDebuggerNode *ed = EditorDebuggerNode::get_singleton();
			editor_data->get_undo_redo().add_do_method(ed, "live_debug_remove_and_keep_node", edited_scene->get_path_to(n), n->get_instance_id());
			editor_data->get_undo_redo().add_undo_method(ed, "live_debug_restore_node", n->get_instance_id(), edited_scene->get_path_to(n->get_parent()), n->get_index());
		}
	}
	editor_data->get_undo_redo().commit_action();

	// hack, force 2d editor viewport to refresh after deletion
	if (CanvasItemEditor *editor = CanvasItemEditor::get_singleton()) {
		editor->get_viewport_control()->update();
	}

	editor->push_item(nullptr);

	// Fixes the EditorHistory from still offering deleted notes
	EditorHistory *editor_history = EditorNode::get_singleton()->get_editor_history();
	editor_history->cleanup_history();
	EditorNode::get_singleton()->get_inspector_dock()->call("_prepare_history");
}

void SceneTreeDock::_update_script_button() {
	if (!profile_allow_script_editing) {
		button_create_script->hide();
		button_detach_script->hide();
	} else if (EditorNode::get_singleton()->get_editor_selection()->get_selection().size() == 0) {
		button_create_script->hide();
		button_detach_script->hide();
	} else if (EditorNode::get_singleton()->get_editor_selection()->get_selection().size() == 1) {
		Node *n = EditorNode::get_singleton()->get_editor_selection()->get_selected_node_list()[0];
		if (n->get_script().is_null()) {
			button_create_script->show();
			button_detach_script->hide();
		} else {
			button_create_script->hide();
			button_detach_script->show();
		}
	} else {
		button_create_script->hide();
		Array selection = editor_selection->get_selected_nodes();
		for (int i = 0; i < selection.size(); i++) {
			Node *n = Object::cast_to<Node>(selection[i]);
			if (!n->get_script().is_null()) {
				button_detach_script->show();
				return;
			}
		}
		button_detach_script->hide();
	}
}

void SceneTreeDock::_selection_changed() {
	int selection_size = EditorNode::get_singleton()->get_editor_selection()->get_selection().size();
	if (selection_size > 1) {
		//automatically turn on multi-edit
		_tool_selected(TOOL_MULTI_EDIT);
	} else if (selection_size == 0) {
		editor->push_item(nullptr);
	}

	_update_script_button();
}

void SceneTreeDock::_do_create(Node *p_parent) {
	Variant c = create_dialog->instance_selected();

	ERR_FAIL_COND(!c);
	Node *child = Object::cast_to<Node>(c);
	ERR_FAIL_COND(!child);

	editor_data->get_undo_redo().create_action(TTR("Create Node"));

	if (edited_scene) {
		editor_data->get_undo_redo().add_do_method(p_parent, "add_child", child);
		editor_data->get_undo_redo().add_do_method(child, "set_owner", edited_scene);
		editor_data->get_undo_redo().add_do_method(editor_selection, "clear");
		editor_data->get_undo_redo().add_do_method(editor_selection, "add_node", child);
		editor_data->get_undo_redo().add_do_reference(child);
		editor_data->get_undo_redo().add_undo_method(p_parent, "remove_child", child);

		String new_name = p_parent->validate_child_name(child);
		EditorDebuggerNode *ed = EditorDebuggerNode::get_singleton();
		editor_data->get_undo_redo().add_do_method(ed, "live_debug_create_node", edited_scene->get_path_to(p_parent), child->get_class(), new_name);
		editor_data->get_undo_redo().add_undo_method(ed, "live_debug_remove_node", NodePath(String(edited_scene->get_path_to(p_parent)).plus_file(new_name)));

	} else {
		editor_data->get_undo_redo().add_do_method(editor, "set_edited_scene", child);
		editor_data->get_undo_redo().add_do_method(scene_tree, "update_tree");
		editor_data->get_undo_redo().add_do_reference(child);
		editor_data->get_undo_redo().add_undo_method(editor, "set_edited_scene", (Object *)nullptr);
	}

	editor_data->get_undo_redo().commit_action();
	editor->push_item(c);
	editor_selection->clear();
	editor_selection->add_node(child);
	if (Object::cast_to<Control>(c)) {
		//make editor more comfortable, so some controls don't appear super shrunk
		Control *ct = Object::cast_to<Control>(c);

		Size2 ms = ct->get_minimum_size();
		if (ms.width < 4) {
			ms.width = 40;
		}
		if (ms.height < 4) {
			ms.height = 40;
		}
		if (ct->is_layout_rtl()) {
			ct->set_position(ct->get_position() - Vector2(ms.x, 0));
		}
		ct->set_size(ms);
	}
}

void SceneTreeDock::_create() {
	if (current_option == TOOL_NEW) {
		Node *parent = nullptr;

		if (edited_scene) {
			// If root exists in edited scene
			parent = scene_tree->get_selected();
			if (!parent) {
				parent = edited_scene;
			}

		} else {
			// If no root exist in edited scene
			parent = scene_root;
			ERR_FAIL_COND(!parent);
		}

		_do_create(parent);

	} else if (current_option == TOOL_REPLACE) {
		List<Node *> selection = editor_selection->get_selected_node_list();
		ERR_FAIL_COND(selection.size() <= 0);

		UndoRedo *ur = EditorNode::get_singleton()->get_undo_redo();
		ur->create_action(TTR("Change type of node(s)"));

		for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
			Node *n = E->get();
			ERR_FAIL_COND(!n);

			Variant c = create_dialog->instance_selected();

			ERR_FAIL_COND(!c);
			Node *newnode = Object::cast_to<Node>(c);
			ERR_FAIL_COND(!newnode);

			ur->add_do_method(this, "replace_node", n, newnode, true, false);
			ur->add_do_reference(newnode);
			ur->add_undo_method(this, "replace_node", newnode, n, false, false);
			ur->add_undo_reference(n);
		}

		ur->commit_action();
	} else if (current_option == TOOL_REPARENT_TO_NEW_NODE) {
		List<Node *> selection = editor_selection->get_selected_node_list();
		ERR_FAIL_COND(selection.size() <= 0);

		// Find top level node in selection
		bool only_one_top_node = true;

		Node *first = selection.front()->get();
		ERR_FAIL_COND(!first);
		int smaller_path_to_top = first->get_path_to(scene_root).get_name_count();
		Node *top_node = first;

		for (List<Node *>::Element *E = selection.front()->next(); E; E = E->next()) {
			Node *n = E->get();
			ERR_FAIL_COND(!n);

			int path_length = n->get_path_to(scene_root).get_name_count();

			if (top_node != n) {
				if (smaller_path_to_top > path_length) {
					top_node = n;
					smaller_path_to_top = path_length;
					only_one_top_node = true;
				} else if (smaller_path_to_top == path_length) {
					if (only_one_top_node && top_node->get_parent() != n->get_parent()) {
						only_one_top_node = false;
					}
				}
			}
		}

		Node *parent = nullptr;
		if (only_one_top_node) {
			parent = top_node->get_parent();
		} else {
			parent = top_node->get_parent()->get_parent();
		}

		_do_create(parent);

		Vector<Node *> nodes;
		for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
			nodes.push_back(E->get());
		}

		// This works because editor_selection was cleared and populated with last created node in _do_create()
		Node *last_created = editor_selection->get_selected_node_list().front()->get();
		_do_reparent(last_created, -1, nodes, true);
	}

	scene_tree->get_scene_tree()->call_deferred("grab_focus");
}

void SceneTreeDock::replace_node(Node *p_node, Node *p_by_node, bool p_keep_properties, bool p_remove_old) {
	Node *n = p_node;
	Node *newnode = p_by_node;

	if (p_keep_properties) {
		Node *default_oldnode = Object::cast_to<Node>(ClassDB::instance(n->get_class()));
		List<PropertyInfo> pinfo;
		n->get_property_list(&pinfo);

		for (List<PropertyInfo>::Element *E = pinfo.front(); E; E = E->next()) {
			if (!(E->get().usage & PROPERTY_USAGE_STORAGE)) {
				continue;
			}

			if (E->get().name == "__meta__") {
				Dictionary metadata = n->get(E->get().name);
				if (metadata.has("_editor_description_")) {
					newnode->set_meta("_editor_description_", metadata["_editor_description_"]);
				}

				if (Object::cast_to<CanvasItem>(newnode) || Object::cast_to<Node3D>(newnode)) {
					if (metadata.has("_edit_group_") && metadata["_edit_group_"]) {
						newnode->set_meta("_edit_group_", true);
					}
					if (metadata.has("_edit_lock_") && metadata["_edit_lock_"]) {
						newnode->set_meta("_edit_lock_", true);
					}
				}

				continue;
			}

			if (default_oldnode->get(E->get().name) != n->get(E->get().name)) {
				newnode->set(E->get().name, n->get(E->get().name));
			}
		}

		memdelete(default_oldnode);
	}

	editor->push_item(nullptr);

	//reconnect signals
	List<MethodInfo> sl;

	n->get_signal_list(&sl);
	for (List<MethodInfo>::Element *E = sl.front(); E; E = E->next()) {
		List<Object::Connection> cl;
		n->get_signal_connection_list(E->get().name, &cl);

		for (List<Object::Connection>::Element *F = cl.front(); F; F = F->next()) {
			Object::Connection &c = F->get();
			if (!(c.flags & Object::CONNECT_PERSIST)) {
				continue;
			}
			newnode->connect(c.signal.get_name(), c.callable, c.binds, Object::CONNECT_PERSIST);
		}
	}

	String newname = n->get_name();

	List<Node *> to_erase;
	for (int i = 0; i < n->get_child_count(); i++) {
		if (n->get_child(i)->get_owner() == nullptr && n->is_owned_by_parent()) {
			to_erase.push_back(n->get_child(i));
		}
	}
	n->replace_by(newnode, true);

	if (n == edited_scene) {
		edited_scene = newnode;
		editor->set_edited_scene(newnode);
	}

	//small hack to make collisionshapes and other kind of nodes to work
	for (int i = 0; i < newnode->get_child_count(); i++) {
		Node *c = newnode->get_child(i);
		c->call("set_transform", c->call("get_transform"));
	}
	//p_remove_old was added to support undo
	if (p_remove_old) {
		editor_data->get_undo_redo().clear_history();
	}
	newnode->set_name(newname);

	editor->push_item(newnode);

	if (p_remove_old) {
		memdelete(n);

		while (to_erase.front()) {
			memdelete(to_erase.front()->get());
			to_erase.pop_front();
		}
	}
}

void SceneTreeDock::set_edited_scene(Node *p_scene) {
	edited_scene = p_scene;
}

void SceneTreeDock::set_selected(Node *p_node, bool p_emit_selected) {
	scene_tree->set_selected(p_node, p_emit_selected);
}

void SceneTreeDock::_new_scene_from(String p_file) {
	List<Node *> selection = editor_selection->get_selected_node_list();

	if (selection.size() != 1) {
		accept->set_text(TTR("This operation requires a single selected node."));
		accept->popup_centered();
		return;
	}

	if (EditorNode::get_singleton()->is_scene_open(p_file)) {
		accept->set_text(TTR("Can't overwrite scene that is still open!"));
		accept->popup_centered();
		return;
	}

	Node *base = selection.front()->get();

	Map<Node *, Node *> reown;
	reown[editor_data->get_edited_scene_root()] = base;
	Node *copy = base->duplicate_and_reown(reown);
	if (copy) {
		Ref<PackedScene> sdata = memnew(PackedScene);
		Error err = sdata->pack(copy);
		memdelete(copy);

		if (err != OK) {
			accept->set_text(TTR("Couldn't save new scene. Likely dependencies (instances) couldn't be satisfied."));
			accept->popup_centered();
			return;
		}

		int flg = 0;
		if (EditorSettings::get_singleton()->get("filesystem/on_save/compress_binary_resources")) {
			flg |= ResourceSaver::FLAG_COMPRESS;
		}

		err = ResourceSaver::save(p_file, sdata, flg);
		if (err != OK) {
			accept->set_text(TTR("Error saving scene."));
			accept->popup_centered();
			return;
		}
		_replace_with_branch_scene(p_file, base);
	} else {
		accept->set_text(TTR("Error duplicating scene to save it."));
		accept->popup_centered();
		return;
	}
}

static bool _is_node_visible(Node *p_node) {
	if (!p_node->get_owner()) {
		return false;
	}
	if (p_node->get_owner() != EditorNode::get_singleton()->get_edited_scene() && !EditorNode::get_singleton()->get_edited_scene()->is_editable_instance(p_node->get_owner())) {
		return false;
	}

	return true;
}

static bool _has_visible_children(Node *p_node) {
	bool collapsed = p_node->is_displayed_folded();
	if (collapsed) {
		return false;
	}

	for (int i = 0; i < p_node->get_child_count(); i++) {
		Node *child = p_node->get_child(i);
		if (!_is_node_visible(child)) {
			continue;
		}

		return true;
	}

	return false;
}

void SceneTreeDock::_normalize_drop(Node *&to_node, int &to_pos, int p_type) {
	to_pos = -1;

	if (p_type == -1) {
		//drop at above selected node
		if (to_node == EditorNode::get_singleton()->get_edited_scene()) {
			to_node = nullptr;
			ERR_FAIL_MSG("Cannot perform drop above the root node!");
		}

		to_pos = to_node->get_index();
		to_node = to_node->get_parent();

	} else if (p_type == 1) {
		//drop at below selected node
		if (to_node == EditorNode::get_singleton()->get_edited_scene()) {
			//if at lower sibling of root node
			to_pos = 0; //just insert at beginning of root node
			return;
		}

		Node *lower_sibling = nullptr;

		if (_has_visible_children(to_node)) {
			to_pos = 0;
		} else {
			for (int i = to_node->get_index() + 1; i < to_node->get_parent()->get_child_count(); i++) {
				Node *c = to_node->get_parent()->get_child(i);
				if (_is_node_visible(c)) {
					lower_sibling = c;
					break;
				}
			}
			if (lower_sibling) {
				to_pos = lower_sibling->get_index();
			}

			to_node = to_node->get_parent();
		}
	}
}

void SceneTreeDock::_files_dropped(Vector<String> p_files, NodePath p_to, int p_type) {
	Node *node = get_node(p_to);
	ERR_FAIL_COND(!node);

	int to_pos = -1;
	_normalize_drop(node, to_pos, p_type);
	_perform_instance_scenes(p_files, node, to_pos);
}

void SceneTreeDock::_script_dropped(String p_file, NodePath p_to) {
	Ref<Script> scr = ResourceLoader::load(p_file);
	ERR_FAIL_COND(!scr.is_valid());
	Node *n = get_node(p_to);
	if (n) {
		editor_data->get_undo_redo().create_action(TTR("Attach Script"));
		editor_data->get_undo_redo().add_do_method(n, "set_script", scr);
		editor_data->get_undo_redo().add_undo_method(n, "set_script", n->get_script());
		editor_data->get_undo_redo().add_do_method(this, "_update_script_button");
		editor_data->get_undo_redo().add_undo_method(this, "_update_script_button");
		editor_data->get_undo_redo().commit_action();
	}
}

void SceneTreeDock::_nodes_dragged(Array p_nodes, NodePath p_to, int p_type) {
	List<Node *> selection = editor_selection->get_selected_node_list();

	if (selection.is_empty()) {
		return; //nothing to reparent
	}

	Node *to_node = get_node(p_to);
	if (!to_node) {
		return;
	}

	Vector<Node *> nodes;
	for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
		nodes.push_back(E->get());
	}

	int to_pos = -1;

	_normalize_drop(to_node, to_pos, p_type);
	_do_reparent(to_node, to_pos, nodes, !Input::get_singleton()->is_key_pressed(KEY_SHIFT));
}

void SceneTreeDock::_add_children_to_popup(Object *p_obj, int p_depth) {
	if (p_depth > 8) {
		return;
	}

	List<PropertyInfo> pinfo;
	p_obj->get_property_list(&pinfo);
	for (List<PropertyInfo>::Element *E = pinfo.front(); E; E = E->next()) {
		if (!(E->get().usage & PROPERTY_USAGE_EDITOR)) {
			continue;
		}
		if (E->get().hint != PROPERTY_HINT_RESOURCE_TYPE) {
			continue;
		}

		Variant value = p_obj->get(E->get().name);
		if (value.get_type() != Variant::OBJECT) {
			continue;
		}
		Object *obj = value;
		if (!obj) {
			continue;
		}

		Ref<Texture2D> icon = EditorNode::get_singleton()->get_object_icon(obj);

		if (menu->get_item_count() == 0) {
			menu->add_submenu_item(TTR("Sub-Resources"), "Sub-Resources");
		}
		int index = menu_subresources->get_item_count();
		menu_subresources->add_icon_item(icon, E->get().name.capitalize(), EDIT_SUBRESOURCE_BASE + subresources.size());
		menu_subresources->set_item_h_offset(index, p_depth * 10 * EDSCALE);
		subresources.push_back(obj->get_instance_id());

		_add_children_to_popup(obj, p_depth + 1);
	}
}

void SceneTreeDock::_tree_rmb(const Vector2 &p_menu_pos) {
	if (!EditorNode::get_singleton()->get_edited_scene()) {
		menu->clear();
		if (profile_allow_editing) {
			menu->add_icon_shortcut(get_theme_icon("Add", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/add_child_node"), TOOL_NEW);
			menu->add_icon_shortcut(get_theme_icon("Instance", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/instance_scene"), TOOL_INSTANCE);
		}

		menu->set_size(Size2(1, 1));
		menu->set_position(get_screen_position() + p_menu_pos);
		menu->popup();
		return;
	}

	List<Node *> selection = editor_selection->get_selected_node_list();
	List<Node *> full_selection = editor_selection->get_full_selected_node_list(); // Above method only returns nodes with common parent.

	if (selection.size() == 0) {
		return;
	}

	menu->clear();

	Ref<Script> existing_script;
	bool existing_script_removable = true;
	if (selection.size() == 1) {
		Node *selected = selection[0];

		if (profile_allow_editing) {
			subresources.clear();
			menu_subresources->clear();
			menu_subresources->set_size(Size2(1, 1));
			_add_children_to_popup(selection.front()->get(), 0);
			if (menu->get_item_count() > 0) {
				menu->add_separator();
			}

			menu->add_icon_shortcut(get_theme_icon("Add", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/add_child_node"), TOOL_NEW);
			menu->add_icon_shortcut(get_theme_icon("Instance", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/instance_scene"), TOOL_INSTANCE);
		}
		menu->add_icon_shortcut(get_theme_icon("Collapse", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/expand_collapse_all"), TOOL_EXPAND_COLLAPSE);
		menu->add_separator();

		existing_script = selected->get_script();

		if (EditorNode::get_singleton()->get_object_custom_type_base(selected) == existing_script) {
			existing_script_removable = false;
		}
	}

	if (profile_allow_script_editing) {
		menu->add_shortcut(ED_GET_SHORTCUT("scene_tree/cut_node"), TOOL_CUT);
		menu->add_shortcut(ED_GET_SHORTCUT("scene_tree/copy_node"), TOOL_COPY);
		if (selection.size() == 1 && !node_clipboard.is_empty()) {
			menu->add_shortcut(ED_GET_SHORTCUT("scene_tree/paste_node"), TOOL_PASTE);
		}
		menu->add_separator();

		bool add_separator = false;

		if (full_selection.size() == 1) {
			add_separator = true;
			menu->add_icon_shortcut(get_theme_icon("ScriptCreate", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/attach_script"), TOOL_ATTACH_SCRIPT);
			if (existing_script.is_valid()) {
				menu->add_icon_shortcut(get_theme_icon("ScriptExtend", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/extend_script"), TOOL_EXTEND_SCRIPT);
			}
		}
		if (existing_script.is_valid() && existing_script_removable) {
			add_separator = true;
			menu->add_icon_shortcut(get_theme_icon("ScriptRemove", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/detach_script"), TOOL_DETACH_SCRIPT);
		} else if (full_selection.size() > 1) {
			bool script_exists = false;
			for (List<Node *>::Element *E = full_selection.front(); E; E = E->next()) {
				if (!E->get()->get_script().is_null()) {
					script_exists = true;
					break;
				}
			}

			if (script_exists) {
				add_separator = true;
				menu->add_icon_shortcut(get_theme_icon("ScriptRemove", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/detach_script"), TOOL_DETACH_SCRIPT);
			}
		}

		if (add_separator) {
			menu->add_separator();
		}
	}

	if (profile_allow_editing) {
		if (full_selection.size() == 1) {
			menu->add_icon_shortcut(get_theme_icon("Rename", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/rename"), TOOL_RENAME);
		}

		bool can_replace = true;
		for (List<Node *>::Element *E = selection.front(); E; E = E->next()) {
			if (E->get() != edited_scene && (E->get()->get_owner() != edited_scene || E->get()->get_filename() != "")) {
				can_replace = false;
				break;
			}
		}

		if (can_replace) {
			menu->add_icon_shortcut(get_theme_icon("Reload", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/change_node_type"), TOOL_REPLACE);
		}

		if (scene_tree->get_selected() != edited_scene) {
			menu->add_separator();
			menu->add_icon_shortcut(get_theme_icon("MoveUp", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/move_up"), TOOL_MOVE_UP);
			menu->add_icon_shortcut(get_theme_icon("MoveDown", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/move_down"), TOOL_MOVE_DOWN);
			menu->add_icon_shortcut(get_theme_icon("Duplicate", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/duplicate"), TOOL_DUPLICATE);
			menu->add_icon_shortcut(get_theme_icon("Reparent", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/reparent"), TOOL_REPARENT);
			menu->add_icon_shortcut(get_theme_icon("ReparentToNewNode", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/reparent_to_new_node"), TOOL_REPARENT_TO_NEW_NODE);
			if (selection.size() == 1) {
				menu->add_icon_shortcut(get_theme_icon("NewRoot", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/make_root"), TOOL_MAKE_ROOT);
			}
		}
	}
	if (selection.size() == 1) {
		if (profile_allow_editing) {
			menu->add_separator();
			menu->add_icon_shortcut(get_theme_icon("CreateNewSceneFrom", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/save_branch_as_scene"), TOOL_NEW_SCENE_FROM);
		}
		if (full_selection.size() == 1) {
			menu->add_separator();
			menu->add_icon_shortcut(get_theme_icon("CopyNodePath", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/copy_node_path"), TOOL_COPY_NODE_PATH);
		}

		bool is_external = (selection[0]->get_filename() != "");
		if (is_external) {
			bool is_inherited = selection[0]->get_scene_inherited_state() != nullptr;
			bool is_top_level = selection[0]->get_owner() == nullptr;
			if (is_inherited && is_top_level) {
				menu->add_separator();
				if (profile_allow_editing) {
					menu->add_item(TTR("Clear Inheritance"), TOOL_SCENE_CLEAR_INHERITANCE);
				}
				menu->add_icon_item(get_theme_icon("Load", "EditorIcons"), TTR("Open in Editor"), TOOL_SCENE_OPEN_INHERITED);
			} else if (!is_top_level) {
				menu->add_separator();
				bool editable = EditorNode::get_singleton()->get_edited_scene()->is_editable_instance(selection[0]);
				bool placeholder = selection[0]->get_scene_instance_load_placeholder();
				if (profile_allow_editing) {
					menu->add_check_item(TTR("Editable Children"), TOOL_SCENE_EDITABLE_CHILDREN);
					menu->add_check_item(TTR("Load As Placeholder"), TOOL_SCENE_USE_PLACEHOLDER);
					menu->add_item(TTR("Make Local"), TOOL_SCENE_MAKE_LOCAL);
				}
				menu->add_icon_item(get_theme_icon("Load", "EditorIcons"), TTR("Open in Editor"), TOOL_SCENE_OPEN);
				if (profile_allow_editing) {
					menu->set_item_checked(menu->get_item_idx_from_text(TTR("Editable Children")), editable);
					menu->set_item_checked(menu->get_item_idx_from_text(TTR("Load As Placeholder")), placeholder);
				}
			}
		}
	}

	if (profile_allow_editing && selection.size() > 1) {
		//this is not a commonly used action, it makes no sense for it to be where it was nor always present.
		menu->add_separator();
		menu->add_icon_shortcut(get_theme_icon("Rename", "EditorIcons"), ED_GET_SHORTCUT("scene_tree/batch_rename"), TOOL_BATCH_RENAME);
	}
	menu->add_separator();
	menu->add_icon_item(get_theme_icon("Help", "EditorIcons"), TTR("Open Documentation"), TOOL_OPEN_DOCUMENTATION);

	if (profile_allow_editing) {
		menu->add_separator();
		menu->add_icon_shortcut(get_theme_icon("Remove", "EditorIcons"), ED_SHORTCUT("scene_tree/delete", TTR("Delete Node(s)"), KEY_DELETE), TOOL_ERASE);
	}
	menu->set_size(Size2(1, 1));
	menu->set_position(p_menu_pos);
	menu->popup();
}

void SceneTreeDock::_filter_changed(const String &p_filter) {
	scene_tree->set_filter(p_filter);
}

String SceneTreeDock::get_filter() {
	return filter->get_text();
}

void SceneTreeDock::set_filter(const String &p_filter) {
	filter->set_text(p_filter);
	scene_tree->set_filter(p_filter);
}

void SceneTreeDock::_focus_node() {
	Node *node = scene_tree->get_selected();
	ERR_FAIL_COND(!node);

	if (node->is_class("CanvasItem")) {
		CanvasItemEditorPlugin *editor = Object::cast_to<CanvasItemEditorPlugin>(editor_data->get_editor("2D"));
		editor->get_canvas_item_editor()->focus_selection();
	} else {
		Node3DEditorPlugin *editor = Object::cast_to<Node3DEditorPlugin>(editor_data->get_editor("3D"));
		editor->get_spatial_editor()->get_editor_viewport(0)->focus_selection();
	}
}

void SceneTreeDock::attach_script_to_selected(bool p_extend) {
	if (ScriptServer::get_language_count() == 0) {
		EditorNode::get_singleton()->show_warning(TTR("Cannot attach a script: there are no languages registered.\nThis is probably because this editor was built with all language modules disabled."));
		return;
	}

	if (!profile_allow_script_editing) {
		return;
	}

	List<Node *> selection = editor_selection->get_selected_node_list();
	if (selection.is_empty()) {
		return;
	}

	Node *selected = scene_tree->get_selected();
	if (!selected) {
		selected = selection.front()->get();
	}

	Ref<Script> existing = selected->get_script();

	String path = selected->get_filename();
	if (path == "") {
		String root_path = editor_data->get_edited_scene_root()->get_filename();
		if (root_path == "") {
			path = String("res://").plus_file(selected->get_name());
		} else {
			path = root_path.get_base_dir().plus_file(selected->get_name());
		}
	}

	String inherits = selected->get_class();

	if (p_extend && existing.is_valid()) {
		for (int i = 0; i < ScriptServer::get_language_count(); i++) {
			ScriptLanguage *l = ScriptServer::get_language(i);
			if (l->get_type() == existing->get_class()) {
				String name = l->get_global_class_name(existing->get_path());
				if (ScriptServer::is_global_class(name) && EDITOR_GET("interface/editors/derive_script_globals_by_name").operator bool()) {
					inherits = name;
				} else if (l->can_inherit_from_file()) {
					inherits = "\"" + existing->get_path() + "\"";
				}
				break;
			}
		}
	}

	script_create_dialog->connect("script_created", callable_mp(this, &SceneTreeDock::_script_created));
	script_create_dialog->connect("confirmed", callable_mp(this, &SceneTreeDock::_script_creation_closed));
	script_create_dialog->connect("cancelled", callable_mp(this, &SceneTreeDock::_script_creation_closed));
	script_create_dialog->set_inheritance_base_type("Node");
	script_create_dialog->config(inherits, path);
	script_create_dialog->popup_centered();
}

void SceneTreeDock::open_script_dialog(Node *p_for_node, bool p_extend) {
	scene_tree->set_selected(p_for_node, false);

	if (p_extend) {
		_tool_selected(TOOL_EXTEND_SCRIPT);
	} else {
		_tool_selected(TOOL_ATTACH_SCRIPT);
	}
}

void SceneTreeDock::add_remote_tree_editor(Control *p_remote) {
	ERR_FAIL_COND(remote_tree != nullptr);
	add_child(p_remote);
	remote_tree = p_remote;
	remote_tree->hide();
}

void SceneTreeDock::show_remote_tree() {
	_remote_tree_selected();
}

void SceneTreeDock::hide_remote_tree() {
	_local_tree_selected();
}

void SceneTreeDock::show_tab_buttons() {
	button_hb->show();
}

void SceneTreeDock::hide_tab_buttons() {
	button_hb->hide();
}

void SceneTreeDock::_remote_tree_selected() {
	scene_tree->hide();
	create_root_dialog->hide();
	if (remote_tree) {
		remote_tree->show();
	}
	edit_remote->set_pressed(true);
	edit_local->set_pressed(false);

	emit_signal("remote_tree_selected");
}

void SceneTreeDock::_local_tree_selected() {
	if (!bool(EDITOR_GET("interface/editors/show_scene_tree_root_selection")) || get_tree()->get_edited_scene_root() != nullptr) {
		scene_tree->show();
	}
	if (remote_tree) {
		remote_tree->hide();
	}
	edit_remote->set_pressed(false);
	edit_local->set_pressed(true);
}

void SceneTreeDock::_update_create_root_dialog() {
	BaseButton *toggle = Object::cast_to<BaseButton>(create_root_dialog->get_node(String("NodeShortcutsTopRow/NodeShortcutsToggle")));
	Node *node_shortcuts = create_root_dialog->get_node(String("NodeShortcuts"));

	if (!toggle || !node_shortcuts) {
		return;
	}

	Control *beginner_nodes = Object::cast_to<Control>(node_shortcuts->get_node(String("BeginnerNodeShortcuts")));
	Control *favorite_nodes = Object::cast_to<Control>(node_shortcuts->get_node(String("FavoriteNodeShortcuts")));

	if (!beginner_nodes || !favorite_nodes) {
		return;
	}

	EditorSettings::get_singleton()->set_setting("_use_favorites_root_selection", toggle->is_pressed());
	EditorSettings::get_singleton()->save();
	if (toggle->is_pressed()) {
		for (int i = 0; i < favorite_nodes->get_child_count(); i++) {
			favorite_nodes->get_child(i)->queue_delete();
		}

		FileAccess *f = FileAccess::open(EditorSettings::get_singleton()->get_project_settings_dir().plus_file("favorites.Node"), FileAccess::READ);

		if (f) {
			while (!f->eof_reached()) {
				String l = f->get_line().strip_edges();

				if (l != String()) {
					Button *button = memnew(Button);
					favorite_nodes->add_child(button);
					button->set_text(l);
					String name = l.get_slicec(' ', 0);
					if (ScriptServer::is_global_class(name)) {
						name = ScriptServer::get_global_class_native_base(name);
					}
					button->set_icon(EditorNode::get_singleton()->get_class_icon(name));
					button->connect("pressed", callable_mp(this, &SceneTreeDock::_favorite_root_selected), make_binds(l));
				}
			}

			memdelete(f);
		}

		if (!favorite_nodes->is_visible_in_tree()) {
			favorite_nodes->show();
			beginner_nodes->hide();
		}
	} else {
		if (!beginner_nodes->is_visible_in_tree()) {
			beginner_nodes->show();
			favorite_nodes->hide();
		}
	}
}

void SceneTreeDock::_favorite_root_selected(const String &p_class) {
	selected_favorite_root = p_class;
	_tool_selected(TOOL_CREATE_FAVORITE);
}

void SceneTreeDock::_feature_profile_changed() {
	Ref<EditorFeatureProfile> profile = EditorFeatureProfileManager::get_singleton()->get_current_profile();

	if (profile.is_valid()) {
		profile_allow_editing = !profile->is_feature_disabled(EditorFeatureProfile::FEATURE_SCENE_TREE);
		profile_allow_script_editing = !profile->is_feature_disabled(EditorFeatureProfile::FEATURE_SCRIPT);
		bool profile_allow_3d = !profile->is_feature_disabled(EditorFeatureProfile::FEATURE_3D);

		button_3d->set_visible(profile_allow_3d);
		button_add->set_visible(profile_allow_editing);
		button_instance->set_visible(profile_allow_editing);
		scene_tree->set_can_rename(profile_allow_editing);

	} else {
		button_3d->set_visible(true);
		button_add->set_visible(true);
		button_instance->set_visible(true);
		scene_tree->set_can_rename(true);
		profile_allow_editing = true;
		profile_allow_script_editing = true;
	}

	_update_script_button();
}

void SceneTreeDock::_clear_clipboard() {
	for (List<Node *>::Element *E = node_clipboard.front(); E; E = E->next()) {
		memdelete(E->get());
	}
	node_clipboard.clear();
	clipboard_resource_remap.clear();
}

void SceneTreeDock::_create_remap_for_node(Node *p_node, Map<RES, RES> &r_remap) {
	List<PropertyInfo> props;
	p_node->get_property_list(&props);

	for (List<PropertyInfo>::Element *E = props.front(); E; E = E->next()) {
		if (!(E->get().usage & PROPERTY_USAGE_STORAGE)) {
			continue;
		}

		Variant v = p_node->get(E->get().name);
		if (v.is_ref()) {
			RES res = v;
			if (res.is_valid()) {
				if ((res->get_path() == "" || res->get_path().find("::") > -1) && !r_remap.has(res)) {
					_create_remap_for_resource(res, r_remap);
				}
			}
		}
	}

	for (int i = 0; i < p_node->get_child_count(); i++) {
		_create_remap_for_node(p_node->get_child(i), r_remap);
	}
}

void SceneTreeDock::_create_remap_for_resource(RES p_resource, Map<RES, RES> &r_remap) {
	r_remap[p_resource] = p_resource->duplicate();

	List<PropertyInfo> props;
	p_resource->get_property_list(&props);

	for (List<PropertyInfo>::Element *E = props.front(); E; E = E->next()) {
		if (!(E->get().usage & PROPERTY_USAGE_STORAGE)) {
			continue;
		}

		Variant v = p_resource->get(E->get().name);
		if (v.is_ref()) {
			RES res = v;
			if (res.is_valid()) {
				if ((res->get_path() == "" || res->get_path().find("::") > -1) && !r_remap.has(res)) {
					_create_remap_for_resource(res, r_remap);
				}
			}
		}
	}
}

void SceneTreeDock::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_set_owners"), &SceneTreeDock::_set_owners);
	ClassDB::bind_method(D_METHOD("_unhandled_key_input"), &SceneTreeDock::_unhandled_key_input);
	ClassDB::bind_method(D_METHOD("_input"), &SceneTreeDock::_input);
	ClassDB::bind_method(D_METHOD("_update_script_button"), &SceneTreeDock::_update_script_button);

	ClassDB::bind_method(D_METHOD("instance"), &SceneTreeDock::instance);
	ClassDB::bind_method(D_METHOD("get_tree_editor"), &SceneTreeDock::get_tree_editor);
	ClassDB::bind_method(D_METHOD("replace_node"), &SceneTreeDock::replace_node);

	ADD_SIGNAL(MethodInfo("remote_tree_selected"));
}

SceneTreeDock::SceneTreeDock(EditorNode *p_editor, Node *p_scene_root, EditorSelection *p_editor_selection, EditorData &p_editor_data) {
	set_name("Scene");
	editor = p_editor;
	edited_scene = nullptr;
	editor_data = &p_editor_data;
	editor_selection = p_editor_selection;
	scene_root = p_scene_root;

	VBoxContainer *vbc = this;

	HBoxContainer *filter_hbc = memnew(HBoxContainer);
	filter_hbc->add_theme_constant_override("separate", 0);

	ED_SHORTCUT("scene_tree/rename", TTR("Rename"), KEY_F2);
	ED_SHORTCUT("scene_tree/batch_rename", TTR("Batch Rename"), KEY_MASK_SHIFT | KEY_F2);
	ED_SHORTCUT("scene_tree/add_child_node", TTR("Add Child Node"), KEY_MASK_CMD | KEY_A);
	ED_SHORTCUT("scene_tree/instance_scene", TTR("Instance Child Scene"));
	ED_SHORTCUT("scene_tree/expand_collapse_all", TTR("Expand/Collapse All"));
	ED_SHORTCUT("scene_tree/cut_node", TTR("Cut"), KEY_MASK_CMD | KEY_X);
	ED_SHORTCUT("scene_tree/copy_node", TTR("Copy"), KEY_MASK_CMD | KEY_C);
	ED_SHORTCUT("scene_tree/paste_node", TTR("Paste"), KEY_MASK_CMD | KEY_V);
	ED_SHORTCUT("scene_tree/change_node_type", TTR("Change Type"));
	ED_SHORTCUT("scene_tree/attach_script", TTR("Attach Script"));
	ED_SHORTCUT("scene_tree/extend_script", TTR("Extend Script"));
	ED_SHORTCUT("scene_tree/detach_script", TTR("Detach Script"));
	ED_SHORTCUT("scene_tree/move_up", TTR("Move Up"), KEY_MASK_CMD | KEY_UP);
	ED_SHORTCUT("scene_tree/move_down", TTR("Move Down"), KEY_MASK_CMD | KEY_DOWN);
	ED_SHORTCUT("scene_tree/duplicate", TTR("Duplicate"), KEY_MASK_CMD | KEY_D);
	ED_SHORTCUT("scene_tree/reparent", TTR("Reparent"));
	ED_SHORTCUT("scene_tree/reparent_to_new_node", TTR("Reparent to New Node"));
	ED_SHORTCUT("scene_tree/make_root", TTR("Make Scene Root"));
	ED_SHORTCUT("scene_tree/save_branch_as_scene", TTR("Save Branch as Scene"));
	ED_SHORTCUT("scene_tree/copy_node_path", TTR("Copy Node Path"), KEY_MASK_CMD | KEY_MASK_SHIFT | KEY_C);
	ED_SHORTCUT("scene_tree/delete_no_confirm", TTR("Delete (No Confirm)"), KEY_MASK_SHIFT | KEY_DELETE);
	ED_SHORTCUT("scene_tree/delete", TTR("Delete"), KEY_DELETE);

	button_add = memnew(Button);
	button_add->set_flat(true);
	button_add->connect("pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_NEW, false));
	button_add->set_tooltip(TTR("Add/Create a New Node."));
	button_add->set_shortcut(ED_GET_SHORTCUT("scene_tree/add_child_node"));
	filter_hbc->add_child(button_add);

	button_instance = memnew(Button);
	button_instance->set_flat(true);
	button_instance->connect("pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_INSTANCE, false));
	button_instance->set_tooltip(TTR("Instance a scene file as a Node. Creates an inherited scene if no root node exists."));
	button_instance->set_shortcut(ED_GET_SHORTCUT("scene_tree/instance_scene"));
	filter_hbc->add_child(button_instance);

	vbc->add_child(filter_hbc);
	filter = memnew(LineEdit);
	filter->set_h_size_flags(SIZE_EXPAND_FILL);
	filter->set_placeholder(TTR("Filter nodes"));
	filter_hbc->add_child(filter);
	filter->add_theme_constant_override("minimum_character_width", 0);
	filter->connect("text_changed", callable_mp(this, &SceneTreeDock::_filter_changed));

	button_create_script = memnew(Button);
	button_create_script->set_flat(true);
	button_create_script->connect("pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_ATTACH_SCRIPT, false));
	button_create_script->set_tooltip(TTR("Attach a new or existing script to the selected node."));
	button_create_script->set_shortcut(ED_GET_SHORTCUT("scene_tree/attach_script"));
	filter_hbc->add_child(button_create_script);
	button_create_script->hide();

	button_detach_script = memnew(Button);
	button_detach_script->set_flat(true);
	button_detach_script->connect("pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(TOOL_DETACH_SCRIPT, false));
	button_detach_script->set_tooltip(TTR("Detach the script from the selected node."));
	button_detach_script->set_shortcut(ED_GET_SHORTCUT("scene_tree/detach_script"));
	filter_hbc->add_child(button_detach_script);
	button_detach_script->hide();

	button_hb = memnew(HBoxContainer);
	vbc->add_child(button_hb);

	edit_remote = memnew(Button);
	edit_remote->set_flat(true);
	button_hb->add_child(edit_remote);
	edit_remote->set_h_size_flags(SIZE_EXPAND_FILL);
	edit_remote->set_text(TTR("Remote"));
	edit_remote->set_toggle_mode(true);
	edit_remote->connect("pressed", callable_mp(this, &SceneTreeDock::_remote_tree_selected));

	edit_local = memnew(Button);
	edit_local->set_flat(true);
	button_hb->add_child(edit_local);
	edit_local->set_h_size_flags(SIZE_EXPAND_FILL);
	edit_local->set_text(TTR("Local"));
	edit_local->set_toggle_mode(true);
	edit_local->set_pressed(true);
	edit_local->connect("pressed", callable_mp(this, &SceneTreeDock::_local_tree_selected));

	remote_tree = nullptr;
	button_hb->hide();

	create_root_dialog = memnew(VBoxContainer);
	vbc->add_child(create_root_dialog);
	create_root_dialog->hide();

	scene_tree = memnew(SceneTreeEditor(false, true, true));

	vbc->add_child(scene_tree);
	scene_tree->set_v_size_flags(SIZE_EXPAND | SIZE_FILL);
	scene_tree->connect("rmb_pressed", callable_mp(this, &SceneTreeDock::_tree_rmb));

	scene_tree->connect("node_selected", callable_mp(this, &SceneTreeDock::_node_selected), varray(), CONNECT_DEFERRED);
	scene_tree->connect("node_renamed", callable_mp(this, &SceneTreeDock::_node_renamed), varray(), CONNECT_DEFERRED);
	scene_tree->connect("node_prerename", callable_mp(this, &SceneTreeDock::_node_prerenamed));
	scene_tree->connect("open", callable_mp(this, &SceneTreeDock::_load_request));
	scene_tree->connect("open_script", callable_mp(this, &SceneTreeDock::_script_open_request));
	scene_tree->connect("nodes_rearranged", callable_mp(this, &SceneTreeDock::_nodes_dragged));
	scene_tree->connect("files_dropped", callable_mp(this, &SceneTreeDock::_files_dropped));
	scene_tree->connect("script_dropped", callable_mp(this, &SceneTreeDock::_script_dropped));
	scene_tree->connect("nodes_dragged", callable_mp(this, &SceneTreeDock::_nodes_drag_begin));

	scene_tree->get_scene_tree()->connect("item_double_clicked", callable_mp(this, &SceneTreeDock::_focus_node));

	scene_tree->set_undo_redo(&editor_data->get_undo_redo());
	scene_tree->set_editor_selection(editor_selection);

	create_dialog = memnew(CreateDialog);
	create_dialog->set_base_type("Node");
	add_child(create_dialog);
	create_dialog->connect("create", callable_mp(this, &SceneTreeDock::_create));
	create_dialog->connect("favorites_updated", callable_mp(this, &SceneTreeDock::_update_create_root_dialog));

	rename_dialog = memnew(RenameDialog(scene_tree, &editor_data->get_undo_redo()));
	add_child(rename_dialog);

	script_create_dialog = memnew(ScriptCreateDialog);
	script_create_dialog->set_inheritance_base_type("Node");
	add_child(script_create_dialog);

	reparent_dialog = memnew(ReparentDialog);
	add_child(reparent_dialog);
	reparent_dialog->connect("reparent", callable_mp(this, &SceneTreeDock::_node_reparent));

	accept = memnew(AcceptDialog);
	add_child(accept);

	quick_open = memnew(EditorQuickOpen);
	add_child(quick_open);
	quick_open->connect("quick_open", callable_mp(this, &SceneTreeDock::_quick_open));

	set_process_unhandled_key_input(true);

	delete_dialog = memnew(ConfirmationDialog);
	add_child(delete_dialog);
	delete_dialog->connect("confirmed", callable_mp(this, &SceneTreeDock::_delete_confirm), varray(false));

	editable_instance_remove_dialog = memnew(ConfirmationDialog);
	add_child(editable_instance_remove_dialog);
	editable_instance_remove_dialog->connect("confirmed", callable_mp(this, &SceneTreeDock::_toggle_editable_children_from_selection));

	placeholder_editable_instance_remove_dialog = memnew(ConfirmationDialog);
	add_child(placeholder_editable_instance_remove_dialog);
	placeholder_editable_instance_remove_dialog->connect("confirmed", callable_mp(this, &SceneTreeDock::_toggle_placeholder_from_selection));

	new_scene_from_dialog = memnew(EditorFileDialog);
	new_scene_from_dialog->set_file_mode(EditorFileDialog::FILE_MODE_SAVE_FILE);
	add_child(new_scene_from_dialog);
	new_scene_from_dialog->connect("file_selected", callable_mp(this, &SceneTreeDock::_new_scene_from));

	menu = memnew(PopupMenu);
	add_child(menu);
	menu->connect("id_pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(false));

	menu_subresources = memnew(PopupMenu);
	menu_subresources->set_name("Sub-Resources");
	menu_subresources->connect("id_pressed", callable_mp(this, &SceneTreeDock::_tool_selected), make_binds(false));
	menu->add_child(menu_subresources);
	first_enter = true;
	restore_script_editor_on_drag = false;

	clear_inherit_confirm = memnew(ConfirmationDialog);
	clear_inherit_confirm->set_text(TTR("Clear Inheritance? (No Undo!)"));
	clear_inherit_confirm->get_ok_button()->set_text(TTR("Clear"));
	add_child(clear_inherit_confirm);

	set_process_input(true);
	set_process(true);

	profile_allow_editing = true;
	profile_allow_script_editing = true;

	EDITOR_DEF("interface/editors/show_scene_tree_root_selection", true);
	EDITOR_DEF("interface/editors/derive_script_globals_by_name", true);
	EDITOR_DEF("_use_favorites_root_selection", false);
}

SceneTreeDock::~SceneTreeDock() {
	if (!node_clipboard.is_empty()) {
		_clear_clipboard();
	}
}