Repository: godotengine/godot
File: editor/docks/filesystem_dock.cpp (C++)

Code before:

void FileSystemDock::_rename_operation_confirm() {
	String new_name;
	TreeItem *ti = tree->get_edited();
	int col_index = tree->get_edited_column();

	if (ti) {
		new_name = ti->get_text(col_index).strip_edges();
	} else {
		new_name = files->get_edit_text().strip_edges();
	}
	String old_name = to_rename.is_file ? to_rename.path.get_file() : to_rename.path.left(-1).get_file();

	bool rename_error = false;
	if (new_name.length() == 0) {
		EditorNode::get_singleton()->show_warning(TTRC("No name provided."));
		rename_error = true;
	} else if (new_name.contains_char('/') || new_name.contains_char('\\') || new_name.contains_char(':')) {
		EditorNode::get_singleton()->show_warning(TTRC("Name contains invalid characters."));
		rename_error = true;
	} else if (new_name[0] == '.') {
		EditorNode::get_singleton()->show_warning(TTRC("This filename begins with a dot rendering the file invisible to the editor.\nIf you want to rename it anyway, use your operating system's file manager."));
		rename_error = true;
	} else if (to_rename.is_file && to_rename.path.get_extension() != new_name.get_extension()) {
		if (!EditorFileSystem::get_singleton()->get_valid_extensions().find(new_name.get_extension())) {
			EditorNode::get_singleton()->show_warning(TTRC("This file extension is not recognized by the editor.\nIf you want to rename it anyway, use your operating system's file manager.\nAfter renaming to an unknown extension, the file won't be shown in the editor anymore.\nTo make the editor recognize this file extension, add it to the one of the lists of extensions in Editor Settings > Docks > FileSystem."));
			rename_error = true;
		}
	}

	// Restore original name.
	if (rename_error) {
		if (ti) {
			ti->set_text(col_index, old_name);
		}
		return;
	}

	String old_path = to_rename.path.ends_with("/") ? to_rename.path.left(-1) : to_rename.path;
	String new_path = old_path.get_base_dir().path_join(new_name);
	if (old_path == new_path) {
		return;
	}

	if (EditorFileSystem::get_singleton()->is_group_file(old_path)) {
		EditorFileSystem::get_singleton()->move_group_file(old_path, new_path);
	}

	// Present a more user friendly warning for name conflict.
	Ref<DirAccess> da = DirAccess::create(DirAccess::ACCESS_RESOURCES);


Review comment (suggestion):
```suggestion
			EditorNode::get_singleton()->show_warning(TTRC("This file extension is not recognized by the editor.\nIf you want to rename it anyway, use your operating system's file manager.\nAfter renaming to an unknown extension, the file won't be shown in the editor anymore.\nTo make the editor recognize this file extension, add it to one of the lists of extensions in Editor Settings > Docks > FileSystem."));
```
If there's multiple lists

Code after:
		EditorFileSystem::get_singleton()->emit_signal(SNAME("script_classes_updated"));
	}
	emit_signal(SNAME("resource_removed"), p_resource);
}

void FileSystemDock::_file_removed(const String &p_file) {
	emit_signal(SNAME("file_removed"), p_file);

	// Find the closest parent directory available, in case multiple items were deleted along the same path.
	current_path = p_file.get_base_dir();
	Ref<DirAccess> da = DirAccess::create(DirAccess::ACCESS_RESOURCES);
	while (!da->dir_exists(current_path)) {
		current_path = current_path.get_base_dir();
	}

	current_path_line_edit->set_text(current_path);
}

void FileSystemDock::_folder_removed(const String &p_folder) {
	emit_signal(SNAME("folder_removed"), p_folder);

	// Find the closest parent directory available, in case multiple items were deleted along the same path.
	current_path = p_folder.get_base_dir();
	Ref<DirAccess> da = DirAccess::create(DirAccess::ACCESS_RESOURCES);
	while (!da->dir_exists(current_path)) {
		current_path = current_path.get_base_dir();
	}

	// Remove assigned folder color for all subfolders.
	bool folder_colors_updated = false;
	for (const Variant &E : assigned_folder_colors.get_key_list()) {
		const String &path = E;
		// These folder paths are guaranteed to end with a "/".
		if (path.begins_with(p_folder)) {
			assigned_folder_colors.erase(path);
			folder_colors_updated = true;
		}
	}
	if (folder_colors_updated) {
		_update_folder_colors_setting();
	}

	current_path_line_edit->set_text(current_path);
	EditorFileSystemDirectory *efd = EditorFileSystem::get_singleton()->get_filesystem_path(current_path);
	if (efd) {
		efd->force_update();
	}
}

void FileSystemDock::_rename_operation_confirm() {
	String new_name;