Add per-bone meta to Skeleton3D

Individual bones are not represented as `Node`s in Godot, in order to support meta functionality for them the skeleton has to carry the information similarly to how other per-bone properties are handled.
- Also adds support for GLTF import/export

1 files changed, 118 insertions, 0 deletions

diff --git a/editor/add_metadata_dialog.cpp b/editor/add_metadata_dialog.cpp
new file mode 100644
index 0000000000..0a070e37b6
--- /dev/null
+++ b/editor/add_metadata_dialog.cpp
@@ -0,0 +1,118 @@
+/**************************************************************************/
+/*  add_metadata_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  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* 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 "add_metadata_dialog.h"
+
+AddMetadataDialog::AddMetadataDialog() {
+	VBoxContainer *vbc = memnew(VBoxContainer);
+	add_child(vbc);
+
+	HBoxContainer *hbc = memnew(HBoxContainer);
+	vbc->add_child(hbc);
+	hbc->add_child(memnew(Label(TTR("Name:"))));
+
+	add_meta_name = memnew(LineEdit);
+	add_meta_name->set_custom_minimum_size(Size2(200 * EDSCALE, 1));
+	hbc->add_child(add_meta_name);
+	hbc->add_child(memnew(Label(TTR("Type:"))));
+
+	add_meta_type = memnew(OptionButton);
+
+	hbc->add_child(add_meta_type);
+
+	Control *spacing = memnew(Control);
+	vbc->add_child(spacing);
+	spacing->set_custom_minimum_size(Size2(0, 10 * EDSCALE));
+
+	set_ok_button_text(TTR("Add"));
+	register_text_enter(add_meta_name);
+
+	validation_panel = memnew(EditorValidationPanel);
+	vbc->add_child(validation_panel);
+	validation_panel->add_line(EditorValidationPanel::MSG_ID_DEFAULT, TTR("Metadata name is valid."));
+	validation_panel->set_update_callback(callable_mp(this, &AddMetadataDialog::_check_meta_name));
+	validation_panel->set_accept_button(get_ok_button());
+
+	add_meta_name->connect(SceneStringName(text_changed), callable_mp(validation_panel, &EditorValidationPanel::update).unbind(1));
+}
+
+void AddMetadataDialog::_complete_init(const StringName &p_title) {
+	add_meta_name->grab_focus();
+	add_meta_name->set_text("");
+	validation_panel->update();
+
+	set_title(vformat(TTR("Add Metadata Property for \"%s\""), p_title));
+
+	// Skip if we already completed the initialization.
+	if (add_meta_type->get_item_count()) {
+		return;
+	}
+
+	// Theme icons can be retrieved only the Window has been initialized.
+	for (int i = 0; i < Variant::VARIANT_MAX; i++) {
+		if (i == Variant::NIL || i == Variant::RID || i == Variant::CALLABLE || i == Variant::SIGNAL) {
+			continue; //not editable by inspector.
+		}
+		String type = i == Variant::OBJECT ? String("Resource") : Variant::get_type_name(Variant::Type(i));
+
+		add_meta_type->add_icon_item(get_editor_theme_icon(type), type, i);
+	}
+}
+
+void AddMetadataDialog::open(const StringName p_title, List<StringName> &p_existing_metas) {
+	this->_existing_metas = p_existing_metas;
+	_complete_init(p_title);
+	popup_centered();
+}
+
+StringName AddMetadataDialog::get_meta_name() {
+	return add_meta_name->get_text();
+}
+
+Variant AddMetadataDialog::get_meta_defval() {
+	Variant defval;
+	Callable::CallError ce;
+	Variant::construct(Variant::Type(add_meta_type->get_selected_id()), defval, nullptr, 0, ce);
+	return defval;
+}
+
+void AddMetadataDialog::_check_meta_name() {
+	const String meta_name = add_meta_name->get_text();
+
+	if (meta_name.is_empty()) {
+		validation_panel->set_message(EditorValidationPanel::MSG_ID_DEFAULT, TTR("Metadata name can't be empty."), EditorValidationPanel::MSG_ERROR);
+	} else if (!meta_name.is_valid_ascii_identifier()) {
+		validation_panel->set_message(EditorValidationPanel::MSG_ID_DEFAULT, TTR("Metadata name must be a valid identifier."), EditorValidationPanel::MSG_ERROR);
+	} else if (_existing_metas.find(meta_name)) {
+		validation_panel->set_message(EditorValidationPanel::MSG_ID_DEFAULT, vformat(TTR("Metadata with name \"%s\" already exists."), meta_name), EditorValidationPanel::MSG_ERROR);
+	} else if (meta_name[0] == '_') {
+		validation_panel->set_message(EditorValidationPanel::MSG_ID_DEFAULT, TTR("Names starting with _ are reserved for editor-only metadata."), EditorValidationPanel::MSG_ERROR);
+	}
+}