godot/editor/import_dock.cpp

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

#include "core/config/project_settings.h"
#include "editor/editor_node.h"
#include "editor/editor_resource_preview.h"
#include "editor/editor_scale.h"
#include "editor/editor_settings.h"
#include "editor/editor_string_names.h"
#include "editor/editor_undo_redo_manager.h"

class ImportDockParameters : public Object {
	GDCLASS(ImportDockParameters, Object);

public:
	HashMap<StringName, Variant> values;
	List<PropertyInfo> properties;
	Ref<ResourceImporter> importer;
	Vector<String> paths;
	HashSet<StringName> checked;
	bool checking;
	String base_options_path;

	bool _set(const StringName &p_name, const Variant &p_value) {
		if (values.has(p_name)) {
			values[p_name] = p_value;
			if (checking) {
				checked.insert(p_name);
				notify_property_list_changed();
			}
			return true;
		}

		return false;
	}

	bool _get(const StringName &p_name, Variant &r_ret) const {
		if (values.has(p_name)) {
			r_ret = values[p_name];
			return true;
		}

		return false;
	}
	void _get_property_list(List<PropertyInfo> *p_list) const {
		for (const PropertyInfo &E : properties) {
			if (!importer->get_option_visibility(base_options_path, E.name, values)) {
				continue;
			}
			PropertyInfo pi = E;
			if (checking) {
				pi.usage |= PROPERTY_USAGE_CHECKABLE;
				if (checked.has(E.name)) {
					pi.usage |= PROPERTY_USAGE_CHECKED;
				}
			}
			p_list->push_back(pi);
		}
	}

	void update() {
		notify_property_list_changed();
	}

	ImportDockParameters() {
		checking = false;
	}
};

ImportDock *ImportDock::singleton = nullptr;

void ImportDock::set_edit_path(const String &p_path) {
	Ref<ConfigFile> config;
	config.instantiate();
	Error err = config->load(p_path + ".import");
	if (err != OK) {
		clear();
		return;
	}

	String importer_name = config->get_value("remap", "importer");

	params->importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);

	params->paths.clear();
	params->paths.push_back(p_path);
	params->base_options_path = p_path;

	_update_options(p_path, config);

	List<Ref<ResourceImporter>> importers;
	ResourceFormatImporter::get_singleton()->get_importers_for_extension(p_path.get_extension(), &importers);
	List<Pair<String, String>> importer_names;

	for (const Ref<ResourceImporter> &E : importers) {
		importer_names.push_back(Pair<String, String>(E->get_visible_name(), E->get_importer_name()));
	}

	importer_names.sort_custom<PairSort<String, String>>();

	import_as->clear();

	for (const Pair<String, String> &E : importer_names) {
		import_as->add_item(E.first);
		import_as->set_item_metadata(-1, E.second);
		if (E.second == importer_name) {
			import_as->select(import_as->get_item_count() - 1);
		}
	}

	_add_keep_import_option(importer_name);

	import->set_disabled(false);
	_set_dirty(false);
	import_as->set_disabled(false);
	preset->set_disabled(false);
	content->show();
	select_a_resource->hide();

	imported->set_text(p_path.get_file());
}

void ImportDock::_add_keep_import_option(const String &p_importer_name) {
	import_as->add_separator();
	import_as->add_item(TTR("Keep File (No Import)"));
	import_as->set_item_metadata(-1, "keep");
	if (p_importer_name == "keep") {
		import_as->select(import_as->get_item_count() - 1);
	}
}

void ImportDock::_update_options(const String &p_path, const Ref<ConfigFile> &p_config) {
	// Set the importer class to fetch the correct class in the XML class reference.
	// This allows tooltips to display when hovering properties.
	if (params->importer != nullptr) {
		// Null check to avoid crashing if the "Keep File (No Import)" mode is selected.
		import_opts->set_object_class(params->importer->get_class_name());
	}

	List<ResourceImporter::ImportOption> options;

	if (params->importer.is_valid()) {
		params->importer->get_import_options(p_path, &options);
	}

	params->properties.clear();
	params->values.clear();
	params->checking = params->paths.size() > 1;
	params->checked.clear();
	params->base_options_path = p_path;

	for (const ResourceImporter::ImportOption &E : options) {
		params->properties.push_back(E.option);
		if (p_config.is_valid() && p_config->has_section_key("params", E.option.name)) {
			params->values[E.option.name] = p_config->get_value("params", E.option.name);
		} else {
			params->values[E.option.name] = E.default_value;
		}
	}

	params->update();
	_update_preset_menu();

	if (params->importer.is_valid() && params->paths.size() == 1 && params->importer->has_advanced_options()) {
		advanced->show();
		advanced_spacer->show();
	} else {
		advanced->hide();
		advanced_spacer->hide();
	}
}

void ImportDock::set_edit_multiple_paths(const Vector<String> &p_paths) {
	clear();

	// Use the value that is repeated the most.
	HashMap<String, Dictionary> value_frequency;
	HashSet<String> extensions;

	for (int i = 0; i < p_paths.size(); i++) {
		Ref<ConfigFile> config;
		config.instantiate();
		extensions.insert(p_paths[i].get_extension());
		Error err = config->load(p_paths[i] + ".import");
		ERR_CONTINUE(err != OK);

		if (i == 0) {
			params->importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(config->get_value("remap", "importer"));
			if (params->importer.is_null()) {
				clear();
				return;
			}
		}

		if (!config->has_section("params")) {
			continue;
		}

		List<String> keys;
		config->get_section_keys("params", &keys);

		for (const String &E : keys) {
			if (!value_frequency.has(E)) {
				value_frequency[E] = Dictionary();
			}

			Variant value = config->get_value("params", E);

			if (value_frequency[E].has(value)) {
				value_frequency[E][value] = int(value_frequency[E][value]) + 1;
			} else {
				value_frequency[E][value] = 1;
			}
		}
	}

	ERR_FAIL_COND(params->importer.is_null());

	String base_path;
	if (extensions.size() == 1 && p_paths.size() > 0) {
		base_path = p_paths[0];
	}
	List<ResourceImporter::ImportOption> options;
	params->importer->get_import_options(base_path, &options);

	params->properties.clear();
	params->values.clear();
	params->checking = true;
	params->checked.clear();
	params->base_options_path = base_path;

	for (const ResourceImporter::ImportOption &E : options) {
		params->properties.push_back(E.option);

		if (value_frequency.has(E.option.name)) {
			Dictionary d = value_frequency[E.option.name];
			int freq = 0;
			List<Variant> v;
			d.get_key_list(&v);
			Variant value;
			for (const Variant &F : v) {
				int f = d[F];
				if (f > freq) {
					value = F;
				}
			}

			params->values[E.option.name] = value;
		} else {
			params->values[E.option.name] = E.default_value;
		}
	}

	params->update();

	List<Ref<ResourceImporter>> importers;
	ResourceFormatImporter::get_singleton()->get_importers_for_extension(p_paths[0].get_extension(), &importers);
	List<Pair<String, String>> importer_names;

	for (const Ref<ResourceImporter> &E : importers) {
		importer_names.push_back(Pair<String, String>(E->get_visible_name(), E->get_importer_name()));
	}

	importer_names.sort_custom<PairSort<String, String>>();

	import_as->clear();

	for (const Pair<String, String> &E : importer_names) {
		import_as->add_item(E.first);
		import_as->set_item_metadata(-1, E.second);
		if (E.second == params->importer->get_importer_name()) {
			import_as->select(import_as->get_item_count() - 1);
		}
	}

	_add_keep_import_option(params->importer->get_importer_name());

	_update_preset_menu();

	params->paths = p_paths;
	import->set_disabled(false);
	_set_dirty(false);
	import_as->set_disabled(false);
	preset->set_disabled(false);
	content->show();
	select_a_resource->hide();

	imported->set_text(vformat(TTR("%d Files"), p_paths.size()));

	if (params->paths.size() == 1 && params->importer->has_advanced_options()) {
		advanced->show();
		advanced_spacer->show();
	} else {
		advanced->hide();
		advanced_spacer->hide();
	}
}

void ImportDock::reimport_resources(const Vector<String> &p_paths) {
	switch (p_paths.size()) {
		case 0:
			ERR_FAIL_MSG("You need to select files to reimport them.");
		case 1:
			set_edit_path(p_paths[0]);
			break;
		default:
			set_edit_multiple_paths(p_paths);
			break;
	}

	_reimport_attempt();
}

void ImportDock::_update_preset_menu() {
	preset->get_popup()->clear();

	if (params->importer.is_null()) {
		preset->get_popup()->add_item(TTR("Default"));
		preset->hide();
		return;
	}
	preset->show();

	if (params->importer->get_preset_count() == 0) {
		preset->get_popup()->add_item(TTR("Default"));
	} else {
		for (int i = 0; i < params->importer->get_preset_count(); i++) {
			preset->get_popup()->add_item(params->importer->get_preset_name(i));
		}
	}

	preset->get_popup()->add_separator();
	preset->get_popup()->add_item(vformat(TTR("Set as Default for '%s'"), params->importer->get_visible_name()), ITEM_SET_AS_DEFAULT);
	if (ProjectSettings::get_singleton()->has_setting("importer_defaults/" + params->importer->get_importer_name())) {
		preset->get_popup()->add_item(TTR("Load Default"), ITEM_LOAD_DEFAULT);
		preset->get_popup()->add_separator();
		preset->get_popup()->add_item(vformat(TTR("Clear Default for '%s'"), params->importer->get_visible_name()), ITEM_CLEAR_DEFAULT);
	}
}

void ImportDock::_importer_selected(int i_idx) {
	String name = import_as->get_selected_metadata();
	if (name == "keep") {
		params->importer.unref();
		_update_options(params->base_options_path, Ref<ConfigFile>());
	} else {
		Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(name);
		ERR_FAIL_COND(importer.is_null());

		params->importer = importer;
		Ref<ConfigFile> config;
		if (params->paths.size()) {
			String path = params->paths[0];
			config.instantiate();
			Error err = config->load(path + ".import");
			if (err != OK) {
				config.unref();
			}
		}
		_update_options(params->base_options_path, config);
	}
}

void ImportDock::_preset_selected(int p_idx) {
	int item_id = preset->get_popup()->get_item_id(p_idx);

	switch (item_id) {
		case ITEM_SET_AS_DEFAULT: {
			Dictionary d;

			for (const PropertyInfo &E : params->properties) {
				d[E.name] = params->values[E.name];
			}

			ProjectSettings::get_singleton()->set("importer_defaults/" + params->importer->get_importer_name(), d);
			ProjectSettings::get_singleton()->save();
			_update_preset_menu();
		} break;
		case ITEM_LOAD_DEFAULT: {
			ERR_FAIL_COND(!ProjectSettings::get_singleton()->has_setting("importer_defaults/" + params->importer->get_importer_name()));

			Dictionary d = GLOBAL_GET("importer_defaults/" + params->importer->get_importer_name());
			List<Variant> v;
			d.get_key_list(&v);

			if (params->checking) {
				params->checked.clear();
			}
			for (const Variant &E : v) {
				params->values[E] = d[E];
				if (params->checking) {
					params->checked.insert(E);
				}
			}
			params->update();
		} break;
		case ITEM_CLEAR_DEFAULT: {
			ProjectSettings::get_singleton()->set("importer_defaults/" + params->importer->get_importer_name(), Variant());
			ProjectSettings::get_singleton()->save();
			_update_preset_menu();
		} break;
		default: {
			List<ResourceImporter::ImportOption> options;

			params->importer->get_import_options(params->base_options_path, &options, p_idx);

			if (params->checking) {
				params->checked.clear();
			}
			for (const ResourceImporter::ImportOption &E : options) {
				params->values[E.option.name] = E.default_value;
				if (params->checking) {
					params->checked.insert(E.option.name);
				}
			}
			params->update();
		} break;
	}
}

void ImportDock::clear() {
	imported->set_text("");
	import->set_disabled(true);
	import_as->clear();
	import_as->set_disabled(true);
	preset->set_disabled(true);
	params->values.clear();
	params->properties.clear();
	params->update();
	preset->get_popup()->clear();
	content->hide();
	select_a_resource->show();
}

static bool _find_owners(EditorFileSystemDirectory *efsd, const String &p_path) {
	if (!efsd) {
		return false;
	}

	for (int i = 0; i < efsd->get_subdir_count(); i++) {
		if (_find_owners(efsd->get_subdir(i), p_path)) {
			return true;
		}
	}

	for (int i = 0; i < efsd->get_file_count(); i++) {
		Vector<String> deps = efsd->get_file_deps(i);
		if (deps.has(p_path)) {
			return true;
		}
	}

	return false;
}

void ImportDock::_reimport_attempt() {
	bool used_in_resources = false;

	String importer_name;
	if (params->importer.is_valid()) {
		importer_name = params->importer->get_importer_name();
	} else {
		importer_name = "keep";
	}
	for (int i = 0; i < params->paths.size(); i++) {
		Ref<ConfigFile> config;
		config.instantiate();
		Error err = config->load(params->paths[i] + ".import");
		ERR_CONTINUE(err != OK);

		String imported_with = config->get_value("remap", "importer");
		if (imported_with != importer_name) {
			need_cleanup.push_back(params->paths[i]);
			if (_find_owners(EditorFileSystem::get_singleton()->get_filesystem(), params->paths[i])) {
				used_in_resources = true;
			}
		}
	}

	if (!need_cleanup.is_empty() || used_in_resources) {
		cleanup_warning->set_visible(!need_cleanup.is_empty());
		label_warning->set_visible(used_in_resources);
		reimport_confirm->popup_centered();
		return;
	}

	_reimport();
}

void ImportDock::_reimport_and_cleanup() {
	HashMap<String, Ref<Resource>> old_resources;

	for (const String &path : need_cleanup) {
		Ref<Resource> res = ResourceLoader::load(path);
		res->set_path("");
		res->set_meta(SNAME("_skip_save_"), true);
		old_resources[path] = res;
	}

	EditorResourcePreview::get_singleton()->stop(); // Don't try to re-create previews after import.
	_reimport();

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

	// After changing resource type we need to make sure that all old instances are unloaded or replaced.
	EditorNode::get_singleton()->push_item(nullptr);
	EditorUndoRedoManager::get_singleton()->clear_history();

	List<Ref<Resource>> external_resources;
	ResourceCache::get_cached_resources(&external_resources);

	for (const String &path : need_cleanup) {
		Ref<Resource> old_res = old_resources[path];
		Ref<Resource> new_res = ResourceLoader::load(path);

		for (int i = 0; i < EditorNode::get_editor_data().get_edited_scene_count(); i++) {
			Node *edited_scene_root = EditorNode::get_editor_data().get_edited_scene_root(i);
			if (likely(edited_scene_root)) {
				_replace_resource_in_object(edited_scene_root, old_res, new_res);
			}
		}
		for (Ref<Resource> res : external_resources) {
			_replace_resource_in_object(res.ptr(), old_res, new_res);
		}
	}
	need_cleanup.clear();
}

void ImportDock::_advanced_options() {
	if (params->paths.size() == 1 && params->importer.is_valid()) {
		params->importer->show_advanced_options(params->paths[0]);
	}
}
void ImportDock::_reimport() {
	for (int i = 0; i < params->paths.size(); i++) {
		Ref<ConfigFile> config;
		config.instantiate();
		Error err = config->load(params->paths[i] + ".import");
		ERR_CONTINUE(err != OK);

		if (params->importer.is_valid()) {
			String importer_name = params->importer->get_importer_name();

			if (params->checking && config->get_value("remap", "importer") == params->importer->get_importer_name()) {
				//update only what is edited (checkboxes) if the importer is the same
				for (const PropertyInfo &E : params->properties) {
					if (params->checked.has(E.name)) {
						config->set_value("params", E.name, params->values[E.name]);
					}
				}
			} else {
				//override entirely
				config->set_value("remap", "importer", importer_name);
				if (config->has_section("params")) {
					config->erase_section("params");
				}

				for (const PropertyInfo &E : params->properties) {
					config->set_value("params", E.name, params->values[E.name]);
				}
			}

			//handle group file
			Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
			ERR_CONTINUE(!importer.is_valid());
			String group_file_property = importer->get_option_group_file();
			if (!group_file_property.is_empty()) {
				//can import from a group (as in, atlas)
				ERR_CONTINUE(!params->values.has(group_file_property));
				String group_file = params->values[group_file_property];
				config->set_value("remap", "group_file", group_file);
			} else {
				config->set_value("remap", "group_file", Variant()); //clear group file if unused
			}

		} else {
			//set to no import
			config->clear();
			config->set_value("remap", "importer", "keep");
		}

		config->save(params->paths[i] + ".import");
	}

	EditorFileSystem::get_singleton()->reimport_files(params->paths);
	EditorFileSystem::get_singleton()->emit_signal(SNAME("filesystem_changed")); //it changed, so force emitting the signal

	_set_dirty(false);
}

void ImportDock::_replace_resource_in_object(Object *p_object, const Ref<Resource> &old_resource, const Ref<Resource> &new_resource) {
	ERR_FAIL_NULL(p_object);

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

	for (const PropertyInfo &p : props) {
		if (p.type != Variant::OBJECT || p.hint != PROPERTY_HINT_RESOURCE_TYPE) {
			continue;
		}

		Ref<Resource> res = p_object->get(p.name);
		if (res.is_null()) {
			continue;
		}

		if (res == old_resource) {
			p_object->set(p.name, new_resource);
		} else {
			_replace_resource_in_object(res.ptr(), old_resource, new_resource);
		}
	}

	Node *n = Object::cast_to<Node>(p_object);
	if (n) {
		for (int i = 0; i < n->get_child_count(); i++) {
			_replace_resource_in_object(n->get_child(i), old_resource, new_resource);
		}
	}
}

void ImportDock::_notification(int p_what) {
	switch (p_what) {
		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			imported->add_theme_style_override("normal", get_theme_stylebox(SNAME("normal"), SNAME("LineEdit")));
		} break;

		case NOTIFICATION_ENTER_TREE: {
			import_opts->edit(params);
			label_warning->add_theme_color_override("font_color", get_theme_color(SNAME("warning_color"), EditorStringName(Editor)));
		} break;
	}
}

void ImportDock::_property_edited(const StringName &p_prop) {
	_set_dirty(true);
}

void ImportDock::_set_dirty(bool p_dirty) {
	if (p_dirty) {
		// Add a dirty marker to notify the user that they should reimport the selected resource to see changes.
		import->set_text(TTR("Reimport") + " (*)");
		import->add_theme_color_override("font_color", get_theme_color(SNAME("warning_color"), EditorStringName(Editor)));
		import->set_tooltip_text(TTR("You have pending changes that haven't been applied yet. Click Reimport to apply changes made to the import options.\nSelecting another resource in the FileSystem dock without clicking Reimport first will discard changes made in the Import dock."));
	} else {
		// Remove the dirty marker on the Reimport button.
		import->set_text(TTR("Reimport"));
		import->remove_theme_color_override("font_color");
		import->set_tooltip_text("");
	}
}

void ImportDock::_property_toggled(const StringName &p_prop, bool p_checked) {
	if (p_checked) {
		params->checked.insert(p_prop);
	} else {
		params->checked.erase(p_prop);
	}
}

void ImportDock::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_reimport"), &ImportDock::_reimport);
}

void ImportDock::initialize_import_options() const {
	ERR_FAIL_COND(!import_opts || !params);

	import_opts->edit(params);
}

ImportDock::ImportDock() {
	singleton = this;
	set_name("Import");

	content = memnew(VBoxContainer);
	content->set_v_size_flags(SIZE_EXPAND_FILL);
	add_child(content);
	content->hide();

	imported = memnew(Label);
	imported->add_theme_style_override("normal", EditorNode::get_singleton()->get_gui_base()->get_theme_stylebox(SNAME("normal"), SNAME("LineEdit")));
	imported->set_clip_text(true);
	content->add_child(imported);
	HBoxContainer *hb = memnew(HBoxContainer);
	content->add_margin_child(TTR("Import As:"), hb);
	import_as = memnew(OptionButton);
	import_as->set_disabled(true);
	import_as->set_fit_to_longest_item(false);
	import_as->set_text_overrun_behavior(TextServer::OVERRUN_TRIM_ELLIPSIS);
	import_as->set_h_size_flags(SIZE_EXPAND_FILL);
	import_as->connect("item_selected", callable_mp(this, &ImportDock::_importer_selected));
	hb->add_child(import_as);
	import_as->set_h_size_flags(SIZE_EXPAND_FILL);
	preset = memnew(MenuButton);
	preset->set_text(TTR("Preset"));
	preset->set_disabled(true);
	preset->get_popup()->connect("index_pressed", callable_mp(this, &ImportDock::_preset_selected));
	hb->add_child(preset);

	import_opts = memnew(EditorInspector);
	content->add_child(import_opts);
	import_opts->set_v_size_flags(SIZE_EXPAND_FILL);
	import_opts->connect("property_edited", callable_mp(this, &ImportDock::_property_edited));
	import_opts->connect("property_toggled", callable_mp(this, &ImportDock::_property_toggled));
	// Make it possible to display tooltips stored in the XML class reference.
	// The object name is set when the importer changes in `_update_options()`.
	import_opts->set_use_doc_hints(true);

	hb = memnew(HBoxContainer);
	content->add_child(hb);
	import = memnew(Button);
	import->set_text(TTR("Reimport"));
	import->set_disabled(true);
	import->connect("pressed", callable_mp(this, &ImportDock::_reimport_attempt));
	if (!DisplayServer::get_singleton()->get_swap_cancel_ok()) {
		advanced_spacer = hb->add_spacer();
		advanced = memnew(Button);
		advanced->set_text(TTR("Advanced..."));
		hb->add_child(advanced);
	}
	hb->add_spacer();
	hb->add_child(import);
	hb->add_spacer();

	if (DisplayServer::get_singleton()->get_swap_cancel_ok()) {
		advanced = memnew(Button);
		advanced->set_text(TTR("Advanced..."));
		hb->add_child(advanced);
		advanced_spacer = hb->add_spacer();
	}

	advanced->hide();
	advanced_spacer->hide();
	advanced->connect("pressed", callable_mp(this, &ImportDock::_advanced_options));

	reimport_confirm = memnew(ConfirmationDialog);
	content->add_child(reimport_confirm);
	reimport_confirm->connect("confirmed", callable_mp(this, &ImportDock::_reimport_and_cleanup));

	VBoxContainer *vbc_confirm = memnew(VBoxContainer());
	cleanup_warning = memnew(Label(TTR("The imported resource is currently loaded. All instances will be replaced and undo history will be cleared.")));
	vbc_confirm->add_child(cleanup_warning);
	label_warning = memnew(Label(TTR("WARNING: Assets exist that use this resource. They may stop loading properly after changing type.")));
	vbc_confirm->add_child(label_warning);
	reimport_confirm->add_child(vbc_confirm);

	params = memnew(ImportDockParameters);

	select_a_resource = memnew(Label);
	select_a_resource->set_text(TTR("Select a resource file in the filesystem or in the inspector to adjust import settings."));
	select_a_resource->set_autowrap_mode(TextServer::AUTOWRAP_WORD);
	select_a_resource->set_custom_minimum_size(Size2(100 * EDSCALE, 0));
	select_a_resource->set_v_size_flags(SIZE_EXPAND_FILL);
	select_a_resource->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_CENTER);
	select_a_resource->set_vertical_alignment(VERTICAL_ALIGNMENT_CENTER);
	add_child(select_a_resource);
}

ImportDock::~ImportDock() {
	singleton = nullptr;
	memdelete(params);
}