/**************************************************************************/
/*  create_dialog.cpp                                                     */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* 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  */
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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      */
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/**************************************************************************/

#include "create_dialog.h"

#include "core/object/class_db.h"
#include "editor/editor_node.h"
#include "editor/editor_string_names.h"
#include "editor/file_system/editor_paths.h"
#include "editor/settings/editor_feature_profile.h"
#include "editor/settings/editor_settings.h"
#include "editor/themes/editor_scale.h"

void CreateDialog::popup_create(bool p_dont_clear, bool p_replace_mode, const String &p_current_type, const String &p_current_name) {
	_fill_type_list();

	icon_fallback = search_options->has_theme_icon(base_type, EditorStringName(EditorIcons)) ? base_type : "Object";

	if (p_dont_clear) {
		search_box->select_all();
	} else {
		search_box->clear();
	}

	if (p_replace_mode) {
		search_box->set_text(p_current_type);
	}

	search_box->grab_focus();
	_update_search();

	if (p_replace_mode) {
		set_title(vformat(TTR("Change Type of \"%s\""), p_current_name));
		set_ok_button_text(TTR("Change"));
	} else {
		set_title(vformat(TTR("Create New %s"), base_type));
		set_ok_button_text(TTR("Create"));
	}

	_load_favorites_and_history();
	_save_and_update_favorite_list();

	// Restore valid window bounds or pop up at default size.
	Rect2 saved_size = EditorSettings::get_singleton()->get_project_metadata("dialog_bounds", "create_new_node", Rect2());
	if (saved_size != Rect2()) {
		popup(saved_size);
	} else {
		popup_centered_clamped(Size2(900, 700) * EDSCALE, 0.8);
	}
}

void CreateDialog::for_inherit() {
	allow_abstract_scripts = true;
}

void CreateDialog::_fill_type_list() {
	List<StringName> complete_type_list;
	ClassDB::get_class_list(&complete_type_list);
	ScriptServer::get_global_class_list(&complete_type_list);

	EditorData &ed = EditorNode::get_editor_data();
	HashMap<String, DocData::ClassDoc> &class_docs_list = EditorHelp::get_doc_data()->class_list;

	for (const StringName &type : complete_type_list) {
		if (!_should_hide_type(type)) {
			TypeInfo type_info;
			type_info.type_name = type;

			const DocData::ClassDoc *class_docs = class_docs_list.getptr(type);
			if (class_docs) {
				type_info.search_keywords = class_docs->keywords.split(",");

				for (int i = 0; i < type_info.search_keywords.size(); i++) {
					type_info.search_keywords.set(i, type_info.search_keywords[i].strip_edges());
				}
			}

			type_info_list.push_back(type_info);

			if (!ed.get_custom_types().has(type)) {
				continue;
			}

			const Vector<EditorData::CustomType> &ct = ed.get_custom_types()[type];
			for (int i = 0; i < ct.size(); i++) {
				custom_type_parents[ct[i].name] = type;
				custom_type_indices[ct[i].name] = i;

				TypeInfo custom_type_info;
				custom_type_info.type_name = ct[i].name;
				type_info_list.push_back(custom_type_info);
			}
		}
	}

	struct TypeInfoCompare {
		StringName::AlphCompare compare;

		_FORCE_INLINE_ bool operator()(const TypeInfo &l, const TypeInfo &r) const {
			return compare(l.type_name, r.type_name);
		}
	};

	type_info_list.sort_custom<TypeInfoCompare>();
}

bool CreateDialog::_is_type_preferred(const String &p_type) const {
	if (ClassDB::class_exists(p_type)) {
		return ClassDB::is_parent_class(p_type, preferred_search_result_type);
	}

	return EditorNode::get_editor_data().script_class_is_parent(p_type, preferred_search_result_type);
}

void CreateDialog::_script_button_clicked(TreeItem *p_item, int p_column, int p_button_id, MouseButton p_mouse_button_index) {
	if (p_mouse_button_index != MouseButton::LEFT) {
		return;
	}
	// The id of opening-script button is 1.
	if (p_button_id != 1) {
		return;
	}

	String scr_path = ScriptServer::get_global_class_path(p_item->get_text(0));
	Ref<Script> scr = ResourceLoader::load(scr_path, "Script");
	ERR_FAIL_COND_MSG(scr.is_null(), vformat("Could not load the script from resource path: %s", scr_path));
	EditorNode::get_singleton()->push_item_no_inspector(scr.ptr());

	hide();
	_cleanup();
}

bool CreateDialog::_is_class_disabled_by_feature_profile(const StringName &p_class) const {
	Ref<EditorFeatureProfile> profile = EditorFeatureProfileManager::get_singleton()->get_current_profile();

	return profile.is_valid() && profile->is_class_disabled(p_class);
}

bool CreateDialog::_should_hide_type(const StringName &p_type) const {
	if (_is_class_disabled_by_feature_profile(p_type)) {
		return true;
	}

	if (is_base_type_node && p_type.operator String().begins_with("Editor")) {
		return true; // Do not show editor nodes.
	}

	if (ClassDB::class_exists(p_type)) {
		if (!ClassDB::can_instantiate(p_type) || ClassDB::is_virtual(p_type)) {
			return true; // Can't create abstract or virtual class.
		}

		if (!ClassDB::is_parent_class(p_type, base_type)) {
			return true; // Wrong inheritance.
		}

		if (!ClassDB::is_class_exposed(p_type)) {
			return true; // Unexposed types.
		}

		for (const StringName &E : type_blacklist) {
			if (ClassDB::is_parent_class(p_type, E)) {
				return true; // Parent type is blacklisted.
			}
		}
		for (const StringName &F : custom_type_blocklist) {
			if (ClassDB::is_parent_class(p_type, F)) {
				return true; // Parent type is excluded in custom type blocklist.
			}
		}
	} else {
		if (!ScriptServer::is_global_class(p_type)) {
			return true;
		}
		if (!EditorNode::get_editor_data().script_class_is_parent(p_type, base_type)) {
			return true; // Wrong inheritance.
		}

		StringName native_type = ScriptServer::get_global_class_native_base(p_type);
		if (ClassDB::class_exists(native_type)) {
			if (!ClassDB::can_instantiate(native_type)) {
				return true;
			} else if (custom_type_blocklist.has(p_type) || custom_type_blocklist.has(native_type)) {
				return true;
			}
		}

		String script_path = ScriptServer::get_global_class_path(p_type);
		if (script_path.begins_with("res://addons/")) {
			int i = script_path.find_char('/', 13); // 13 is length of "res://addons/".
			while (i > -1) {
				const String plugin_path = script_path.substr(0, i).path_join("plugin.cfg");
				if (FileAccess::exists(plugin_path)) {
					return !EditorNode::get_singleton()->is_addon_plugin_enabled(plugin_path);
				}
				i = script_path.find_char('/', i + 1);
			}
		}
		// Abstract scripts cannot be instantiated.
		String path = ScriptServer::get_global_class_path(p_type);
		Ref<Script> scr = ResourceLoader::load(path, "Script");
		return scr.is_null() || (!allow_abstract_scripts && scr->is_abstract());
	}

	return false;
}

void CreateDialog::_update_search() {
	search_options->clear();
	search_options_types.clear();

	TreeItem *root = search_options->create_item();
	root->set_text(0, base_type);
	root->set_icon(0, search_options->get_editor_theme_icon(icon_fallback));
	search_options_types[base_type] = root;
	_configure_search_option_item(root, base_type, ClassDB::class_exists(base_type) ? TypeCategory::CPP_TYPE : TypeCategory::OTHER_TYPE, "");

	const String search_text = search_box->get_text();

	float highest_score = 0.0f;
	StringName best_match;

	for (const TypeInfo &candidate : type_info_list) {
		String match_keyword;

		// First check if the name matches. If it does not, try the search keywords.
		float score = _score_type(candidate.type_name, search_text);
		if (score < 0.0f) {
			for (const String &keyword : candidate.search_keywords) {
				score = _score_type(keyword, search_text);

				// Reduce the score of keywords, since they are an indirect match.
				score *= 0.1f;

				if (score >= 0.0f) {
					match_keyword = keyword;
					break;
				}
			}
		}

		// Search did not match.
		if (score < 0.0f) {
			continue;
		}

		_add_type(candidate.type_name, ClassDB::class_exists(candidate.type_name) ? TypeCategory::CPP_TYPE : TypeCategory::OTHER_TYPE, match_keyword);

		if (score > highest_score) {
			highest_score = score;
			best_match = candidate.type_name;
		}
	}

	// Select the best result.
	if (search_text.is_empty()) {
		select_type(base_type);
	} else if (best_match != StringName()) {
		select_type(best_match);
	} else {
		favorite->set_disabled(true);
		help_bit->set_custom_text(String(), String(), vformat(TTR("No results for \"%s\"."), search_text.replace("[", "[lb]")));
		get_ok_button()->set_disabled(true);
		search_options->deselect_all();
	}
}

void CreateDialog::_add_type(const StringName &p_type, TypeCategory p_type_category, const String &p_match_keyword) {
	if (search_options_types.has(p_type)) {
		return;
	}

	TypeCategory inherited_type = TypeCategory::OTHER_TYPE;

	StringName inherits;
	if (p_type_category == TypeCategory::CPP_TYPE) {
		inherits = ClassDB::get_parent_class(p_type);
		inherited_type = TypeCategory::CPP_TYPE;
	} else {
		if (p_type_category == TypeCategory::PATH_TYPE) {
			ERR_FAIL_COND(!ResourceLoader::exists(p_type, "Script"));
			Ref<Script> scr = ResourceLoader::load(p_type, "Script");
			ERR_FAIL_COND(scr.is_null());

			Ref<Script> base = scr->get_base_script();
			if (base.is_null()) {
				// Must be a native base type.
				StringName extends = scr->get_instance_base_type();
				if (extends == StringName()) {
					// Not a valid script (has compile errors), we therefore ignore it as it can not be instantiated anyway (when selected).
					return;
				}

				inherits = extends;
				inherited_type = TypeCategory::CPP_TYPE;
			} else {
				inherits = base->get_global_name();

				if (inherits == StringName()) {
					inherits = base->get_path();
					inherited_type = TypeCategory::PATH_TYPE;
				}
			}
		} else if (ScriptServer::is_global_class(p_type)) {
			inherits = ScriptServer::get_global_class_base(p_type);
			bool is_native_class = ClassDB::class_exists(inherits);
			inherited_type = is_native_class ? TypeCategory::CPP_TYPE : TypeCategory::OTHER_TYPE;
		} else {
			inherits = custom_type_parents[p_type];
			if (ClassDB::class_exists(inherits)) {
				inherited_type = TypeCategory::CPP_TYPE;
			}
		}
	}

	// Should never happen, but just in case...
	ERR_FAIL_COND(inherits == StringName());

	_add_type(inherits, inherited_type, "");

	TreeItem *item = search_options->create_item(search_options_types[inherits]);
	search_options_types[p_type] = item;
	_configure_search_option_item(item, p_type, p_type_category, p_match_keyword);
}

void CreateDialog::_configure_search_option_item(TreeItem *r_item, const StringName &p_type, TypeCategory p_type_category, const String &p_match_keyword) {
	bool script_type = ScriptServer::is_global_class(p_type);
	bool is_abstract = false;
	bool is_custom_type = false;
	String type_name;
	String text;
	if (p_type_category == TypeCategory::CPP_TYPE) {
		type_name = p_type;
		text = p_type;
	} else if (p_type_category == TypeCategory::PATH_TYPE) {
		type_name = "\"" + p_type + "\"";
		text = "\"" + p_type + "\"";
	} else if (script_type) {
		is_custom_type = true;
		type_name = p_type;
		text = p_type;

		if (!allow_abstract_scripts) {
			is_abstract = ScriptServer::is_global_class_abstract(p_type);
		}

		String tooltip = TTR("Script path: %s");
		bool is_tool = ScriptServer::is_global_class_tool(p_type);
		if (is_tool) {
			tooltip = TTR("The script will run in the editor.") + "\n" + tooltip;
		}
		r_item->add_button(0, get_editor_theme_icon(SNAME("Script")), 1, false, vformat(tooltip, ScriptServer::get_global_class_path(p_type)));
		if (is_tool) {
			int button_index = r_item->get_button_count(0) - 1;
			r_item->set_button_color(0, button_index, get_theme_color(SNAME("accent_color"), EditorStringName(Editor)));
		}
	} else {
		is_custom_type = true;
		type_name = custom_type_parents[p_type];
		text = p_type;
	}

	if (!p_match_keyword.is_empty()) {
		text += "      - " + TTR(vformat("Matches the \"%s\" keyword.", p_match_keyword));
	}
	r_item->set_text(0, text);

	Array meta;
	meta.append(is_custom_type);
	meta.append(type_name);
	r_item->set_metadata(0, meta);

	bool can_instantiate = (p_type_category == TypeCategory::CPP_TYPE && ClassDB::can_instantiate(p_type)) ||
			(p_type_category == TypeCategory::OTHER_TYPE && !(!allow_abstract_scripts && is_abstract));
	bool instantiable = can_instantiate && !(ClassDB::class_exists(p_type) && ClassDB::is_virtual(p_type));

	r_item->set_meta(SNAME("__instantiable"), instantiable);

	r_item->set_icon(0, EditorNode::get_singleton()->get_class_icon(p_type));
	if (!instantiable) {
		r_item->set_custom_color(0, search_options->get_theme_color(SNAME("font_disabled_color"), EditorStringName(Editor)));
	}

	HashMap<String, DocData::ClassDoc>::Iterator class_doc = EditorHelp::get_doc_data()->class_list.find(p_type);

	bool is_deprecated = (class_doc && class_doc->value.is_deprecated);
	bool is_experimental = (class_doc && class_doc->value.is_experimental);

	if (is_deprecated) {
		r_item->add_button(0, get_editor_theme_icon("StatusError"), 0, false, TTR("This class is marked as deprecated."));
	} else if (is_experimental) {
		r_item->add_button(0, get_editor_theme_icon("NodeWarning"), 0, false, TTR("This class is marked as experimental."));
	}

	if (!search_box->get_text().is_empty()) {
		r_item->set_collapsed(false);
	} else {
		// Don't collapse the root node or an abstract node on the first tree level.
		bool should_collapse = p_type != base_type && (r_item->get_parent()->get_text(0) != base_type || can_instantiate);

		if (should_collapse && bool(EDITOR_GET("docks/scene_tree/start_create_dialog_fully_expanded"))) {
			should_collapse = false; // Collapse all nodes anyway.
		}
		r_item->set_collapsed(should_collapse);
	}

	const String &description = DTR(class_doc ? class_doc->value.brief_description : "");
	r_item->set_tooltip_text(0, description);

	if (p_type_category == TypeCategory::OTHER_TYPE && !script_type) {
		Ref<Texture2D> icon = EditorNode::get_editor_data().get_custom_types()[custom_type_parents[p_type]][custom_type_indices[p_type]].icon;
		if (icon.is_valid()) {
			r_item->set_icon(0, icon);
		}
	}
}

float CreateDialog::_score_type(const String &p_type, const String &p_search) const {
	if (p_search.is_empty()) {
		return 0.0f;
	}

	// Determine the best match for a non-empty search.
	if (!p_search.is_subsequence_ofn(p_type)) {
		return -1.0f;
	}

	if (p_type == p_search) {
		// Always favor an exact match (case-sensitive), since clicking a favorite will set the search text to the type.
		return 1.0f;
	}

	const String &type_name = p_type.get_slicec(' ', 0);

	float inverse_length = 1.f / float(type_name.length());

	// Favor types where search term is a substring close to the start of the type.
	float w = 0.5f;
	int pos = type_name.findn(p_search);
	float score = (pos > -1) ? 1.0f - w * MIN(1, 3 * pos * inverse_length) : MAX(0.f, .9f - w);

	// Favor shorter items: they resemble the search term more.
	w = 0.9f;
	score *= (1 - w) + w * MIN(1.0f, p_search.length() * inverse_length);

	score *= _is_type_preferred(type_name) ? 1.0f : 0.9f;

	// Add score for being a favorite type.
	score *= favorite_list.has(type_name) ? 1.0f : 0.8f;

	// Look through at most 5 recent items
	bool in_recent = false;
	constexpr int RECENT_COMPLETION_SIZE = 5;
	for (int i = 0; i < MIN(RECENT_COMPLETION_SIZE - 1, recent->get_item_count()); i++) {
		if (recent->get_item_text(i) == type_name) {
			in_recent = true;
			break;
		}
	}
	score *= in_recent ? 1.0f : 0.9f;

	return score;
}

void CreateDialog::_cleanup() {
	type_info_list.clear();
	favorite_list.clear();
	favorites->clear();
	recent->clear();
	custom_type_parents.clear();
	custom_type_indices.clear();
}

void CreateDialog::_confirmed() {
	String selected_item = get_selected_type();
	if (selected_item.is_empty()) {
		return;
	}

	TreeItem *selected = search_options->get_selected();
	if (!selected->get_meta("__instantiable", true)) {
		return;
	}

	{
		Ref<FileAccess> f = FileAccess::open(EditorPaths::get_singleton()->get_project_settings_dir().path_join("create_recent." + base_type), FileAccess::WRITE);
		if (f.is_valid()) {
			f->store_line(selected_item);

			constexpr int RECENT_HISTORY_SIZE = 15;
			for (int i = 0; i < MIN(RECENT_HISTORY_SIZE - 1, recent->get_item_count()); i++) {
				if (recent->get_item_text(i) != selected_item) {
					f->store_line(recent->get_item_text(i));
				}
			}
		}
	}

	// To prevent, emitting an error from the transient window (shader dialog for example) hide this dialog before emitting the "create" signal.
	hide();

	emit_signal(SNAME("create"));
	_cleanup();
}

void CreateDialog::_text_changed(const String &p_newtext) {
	_update_search();
}

void CreateDialog::_sbox_input(const Ref<InputEvent> &p_event) {
	// Redirect navigational key events to the tree.
	Ref<InputEventKey> key = p_event;
	if (key.is_valid()) {
		if (key->is_action("ui_up", true) || key->is_action("ui_down", true) || key->is_action("ui_page_up") || key->is_action("ui_page_down")) {
			search_options->gui_input(key);
			search_box->accept_event();
		} else if (key->is_action_pressed("ui_select", true)) {
			TreeItem *ti = search_options->get_selected();
			if (ti) {
				ti->set_collapsed(!ti->is_collapsed());
			}
			search_box->accept_event();
		}
	}
}

void CreateDialog::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE: {
			connect(SceneStringName(confirmed), callable_mp(this, &CreateDialog::_confirmed));
		} break;

		case NOTIFICATION_EXIT_TREE: {
			disconnect(SceneStringName(confirmed), callable_mp(this, &CreateDialog::_confirmed));
		} break;

		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (is_visible()) {
				callable_mp((Control *)search_box, &Control::grab_focus).call_deferred(); // Still not visible.
				search_box->select_all();
			} else {
				EditorSettings::get_singleton()->set_project_metadata("dialog_bounds", "create_new_node", Rect2(get_position(), get_size()));
			}
		} break;

		case NOTIFICATION_THEME_CHANGED: {
			const int icon_width = get_theme_constant(SNAME("class_icon_size"), EditorStringName(Editor));
			search_options->add_theme_constant_override("icon_max_width", icon_width);
			favorites->add_theme_constant_override("icon_max_width", icon_width);
			recent->set_fixed_icon_size(Size2(icon_width, icon_width));

			search_box->set_right_icon(get_editor_theme_icon(SNAME("Search")));
			favorite->set_button_icon(get_editor_theme_icon(SNAME("Favorites")));
		} break;
	}
}

void CreateDialog::select_type(const String &p_type, bool p_center_on_item) {
	if (!search_options_types.has(p_type)) {
		return;
	}

	TreeItem *to_select = search_options_types[p_type];
	to_select->select(0);
	search_options->scroll_to_item(to_select, p_center_on_item);

	help_bit->parse_symbol("class|" + p_type + "|");

	favorite->set_disabled(false);
	favorite->set_pressed(favorite_list.has(p_type));

	if (to_select->get_meta("__instantiable", true)) {
		get_ok_button()->set_disabled(false);
		get_ok_button()->set_tooltip_text(String());
	} else {
		get_ok_button()->set_disabled(true);
		get_ok_button()->set_tooltip_text(TTR("The selected class can't be instantiated."));
	}
}

void CreateDialog::select_base() {
	if (search_options_types.is_empty()) {
		_update_search();
	}
	select_type(base_type, false);
}

String CreateDialog::get_selected_type() {
	TreeItem *selected = search_options->get_selected();
	if (!selected) {
		return String();
	}

	return selected->get_text(0);
}

void CreateDialog::set_base_type(const String &p_base) {
	base_type = p_base;
	is_base_type_node = ClassDB::is_parent_class(p_base, "Node");
}

Variant CreateDialog::instantiate_selected() {
	TreeItem *selected = search_options->get_selected();

	if (!selected) {
		return Variant();
	}

	Array meta = selected->get_metadata(0).operator Array();
	ERR_FAIL_COND_V(meta.size() != 2, Variant());

	bool is_custom_type = meta[0].operator bool();
	String type_name = meta[1].operator String();
	Variant obj;
	if (is_custom_type) {
		if (ScriptServer::is_global_class(type_name)) {
			obj = EditorNode::get_editor_data().script_class_instance(type_name);
			Node *n = Object::cast_to<Node>(obj);
			if (n) {
				n->set_name(type_name);
			}
		} else {
			obj = EditorNode::get_editor_data().instantiate_custom_type(selected->get_text(0), type_name);
		}
	} else {
		obj = ClassDB::instantiate(type_name);
	}
	EditorNode::get_editor_data().instantiate_object_properties(obj);

	return obj;
}

void CreateDialog::_item_selected() {
	String name = get_selected_type();
	select_type(name, false);
}

void CreateDialog::_hide_requested() {
	_cancel_pressed(); // From AcceptDialog.
}

void CreateDialog::cancel_pressed() {
	_cleanup();
}

void CreateDialog::_favorite_toggled() {
	TreeItem *item = search_options->get_selected();
	if (!item) {
		return;
	}

	String name = item->get_text(0);

	if (favorite_list.has(name)) {
		favorite_list.erase(name);
		favorite->set_pressed(false);
	} else {
		favorite_list.push_back(name);
		favorite->set_pressed(true);
	}

	_save_and_update_favorite_list();
}

void CreateDialog::_history_selected(int p_idx) {
	search_box->set_text(recent->get_item_text(p_idx).get_slicec(' ', 0));
	favorites->deselect_all();
	_update_search();
}

void CreateDialog::_favorite_selected() {
	TreeItem *item = favorites->get_selected();
	if (!item) {
		return;
	}

	search_box->set_text(item->get_text(0).get_slicec(' ', 0));
	recent->deselect_all();
	_update_search();
}

void CreateDialog::_history_activated(int p_idx) {
	_history_selected(p_idx);
	_confirmed();
}

void CreateDialog::_favorite_activated() {
	_favorite_selected();
	_confirmed();
}

Variant CreateDialog::get_drag_data_fw(const Point2 &p_point, Control *p_from) {
	TreeItem *ti = (p_point == Vector2(Math::INF, Math::INF)) ? favorites->get_selected() : favorites->get_item_at_position(p_point);
	if (ti) {
		Dictionary d;
		d["type"] = "create_favorite_drag";
		d["class"] = ti->get_text(0);

		Button *tb = memnew(Button);
		tb->set_flat(true);
		tb->set_button_icon(ti->get_icon(0));
		tb->set_text(ti->get_text(0));
		tb->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED);
		favorites->set_drag_preview(tb);

		return d;
	}

	return Variant();
}

bool CreateDialog::can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const {
	Dictionary d = p_data;
	if (d.has("type") && String(d["type"]) == "create_favorite_drag") {
		favorites->set_drop_mode_flags(Tree::DROP_MODE_INBETWEEN);
		return true;
	}

	return false;
}

void CreateDialog::drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) {
	Dictionary d = p_data;

	TreeItem *ti = (p_point == Vector2(Math::INF, Math::INF)) ? favorites->get_selected() : favorites->get_item_at_position(p_point);
	if (!ti) {
		return;
	}

	String drop_at = ti->get_text(0);
	int ds = (p_point == Vector2(Math::INF, Math::INF)) ? favorites->get_drop_section_at_position(favorites->get_item_rect(ti).position) : favorites->get_drop_section_at_position(p_point);

	int drop_idx = favorite_list.find(drop_at);
	if (drop_idx < 0) {
		return;
	}

	String type = d["class"];

	int from_idx = favorite_list.find(type);
	if (from_idx < 0) {
		return;
	}

	if (drop_idx == from_idx) {
		ds = -1; //cause it will be gone
	} else if (drop_idx > from_idx) {
		drop_idx--;
	}

	favorite_list.remove_at(from_idx);

	if (ds < 0) {
		favorite_list.insert(drop_idx, type);
	} else {
		if (drop_idx >= favorite_list.size() - 1) {
			favorite_list.push_back(type);
		} else {
			favorite_list.insert(drop_idx + 1, type);
		}
	}

	_save_and_update_favorite_list();
}

void CreateDialog::_save_and_update_favorite_list() {
	favorites->clear();
	TreeItem *root = favorites->create_item();

	{
		Ref<FileAccess> f = FileAccess::open(EditorPaths::get_singleton()->get_project_settings_dir().path_join("favorites." + base_type), FileAccess::WRITE);
		if (f.is_valid()) {
			for (int i = 0; i < favorite_list.size(); i++) {
				String l = favorite_list[i];
				String name = l.get_slicec(' ', 0);
				if (!EditorNode::get_editor_data().is_type_recognized(name)) {
					continue;
				}
				f->store_line(l);

				if (_is_class_disabled_by_feature_profile(name)) {
					continue;
				}

				TreeItem *ti = favorites->create_item(root);
				ti->set_text(0, l);
				ti->set_icon(0, EditorNode::get_singleton()->get_class_icon(name));
			}
		}
	}

	emit_signal(SNAME("favorites_updated"));
}

void CreateDialog::_load_favorites_and_history() {
	String dir = EditorPaths::get_singleton()->get_project_settings_dir();
	Ref<FileAccess> f = FileAccess::open(dir.path_join("create_recent." + base_type), FileAccess::READ);
	if (f.is_valid()) {
		while (!f->eof_reached()) {
			String l = f->get_line().strip_edges();
			String name = l.get_slicec(' ', 0);

			if (EditorNode::get_editor_data().is_type_recognized(name) && !_is_class_disabled_by_feature_profile(name)) {
				recent->add_item(l, EditorNode::get_singleton()->get_class_icon(name));
			}
		}
	}

	f = FileAccess::open(dir.path_join("favorites." + base_type), FileAccess::READ);
	if (f.is_valid()) {
		while (!f->eof_reached()) {
			String l = f->get_line().strip_edges();

			if (!l.is_empty()) {
				favorite_list.push_back(l);
			}
		}
	}
}

void CreateDialog::_bind_methods() {
	ADD_SIGNAL(MethodInfo("create"));
	ADD_SIGNAL(MethodInfo("favorites_updated"));
}

CreateDialog::CreateDialog() {
	base_type = "Object";
	preferred_search_result_type = "";

	type_blacklist.insert("PluginScript"); // PluginScript must be initialized before use, which is not possible here.
	type_blacklist.insert("ScriptCreateDialog"); // This is an exposed editor Node that doesn't have an Editor prefix.

	HSplitContainer *hsc = memnew(HSplitContainer);
	add_child(hsc);

	VSplitContainer *vsc = memnew(VSplitContainer);
	hsc->add_child(vsc);

	VBoxContainer *fav_vb = memnew(VBoxContainer);
	fav_vb->set_custom_minimum_size(Size2(150, 100) * EDSCALE);
	fav_vb->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	vsc->add_child(fav_vb);

	favorites = memnew(Tree);
	favorites->set_accessibility_name(TTRC("Favorites:"));
	favorites->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED);
	favorites->set_hide_root(true);
	favorites->set_hide_folding(true);
	favorites->set_allow_reselect(true);
	favorites->connect("cell_selected", callable_mp(this, &CreateDialog::_favorite_selected));
	favorites->connect("item_activated", callable_mp(this, &CreateDialog::_favorite_activated));
	favorites->add_theme_constant_override("draw_guides", 1);
	favorites->set_theme_type_variation("TreeSecondary");
	SET_DRAG_FORWARDING_GCD(favorites, CreateDialog);
	fav_vb->add_margin_child(TTR("Favorites:"), favorites, true);

	VBoxContainer *rec_vb = memnew(VBoxContainer);
	vsc->add_child(rec_vb);
	rec_vb->set_custom_minimum_size(Size2(150, 100) * EDSCALE);
	rec_vb->set_v_size_flags(Control::SIZE_EXPAND_FILL);

	recent = memnew(ItemList);
	recent->set_accessibility_name(TTRC("Recent:"));
	recent->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED);
	rec_vb->add_margin_child(TTR("Recent:"), recent, true);
	recent->set_allow_reselect(true);
	recent->connect(SceneStringName(item_selected), callable_mp(this, &CreateDialog::_history_selected));
	recent->connect("item_activated", callable_mp(this, &CreateDialog::_history_activated));
	recent->add_theme_constant_override("draw_guides", 1);
	recent->set_theme_type_variation("ItemListSecondary");

	VBoxContainer *vbc = memnew(VBoxContainer);
	vbc->set_custom_minimum_size(Size2(300, 0) * EDSCALE);
	vbc->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	hsc->add_child(vbc);

	search_box = memnew(LineEdit);
	search_box->set_accessibility_name(TTRC("Search"));
	search_box->set_clear_button_enabled(true);
	search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	search_box->connect(SceneStringName(text_changed), callable_mp(this, &CreateDialog::_text_changed));
	search_box->connect(SceneStringName(gui_input), callable_mp(this, &CreateDialog::_sbox_input));

	HBoxContainer *search_hb = memnew(HBoxContainer);
	search_hb->add_child(search_box);

	favorite = memnew(Button);
	favorite->set_toggle_mode(true);
	favorite->set_tooltip_text(TTR("(Un)favorite selected item."));
	favorite->connect(SceneStringName(pressed), callable_mp(this, &CreateDialog::_favorite_toggled));
	search_hb->add_child(favorite);
	vbc->add_margin_child(TTR("Search:"), search_hb);

	search_options = memnew(Tree);
	search_options->set_accessibility_name(TTRC("Matches:"));
	search_options->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED);
	search_options->connect("item_activated", callable_mp(this, &CreateDialog::_confirmed));
	search_options->connect("cell_selected", callable_mp(this, &CreateDialog::_item_selected));
	search_options->connect("button_clicked", callable_mp(this, &CreateDialog::_script_button_clicked));
	vbc->add_margin_child(TTR("Matches:"), search_options, true);

	help_bit = memnew(EditorHelpBit);
	help_bit->set_accessibility_name(TTRC("Description:"));
	help_bit->set_content_height_limits(80 * EDSCALE, 80 * EDSCALE);
	help_bit->connect("request_hide", callable_mp(this, &CreateDialog::_hide_requested));
	vbc->add_margin_child(TTR("Description:"), help_bit);

	register_text_enter(search_box);
	set_hide_on_ok(false);
	set_clamp_to_embedder(true);
}
