Add PropertyListHelper

1 files changed, 138 insertions, 0 deletions

diff --git a/scene/property_list_helper.cpp b/scene/property_list_helper.cpp
new file mode 100644
index 0000000000..596a6a050a
--- /dev/null
+++ b/scene/property_list_helper.cpp
@@ -0,0 +1,138 @@
+/**************************************************************************/
+/*  property_list_helper.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 "property_list_helper.h"
+
+const PropertyListHelper::Property *PropertyListHelper::_get_property(const String &p_property, int *r_index) const {
+	const Vector<String> components = p_property.split("/", true, 2);
+	if (components.size() < 2 || !components[0].begins_with(prefix)) {
+		return nullptr;
+	}
+
+	{
+		const String index_string = components[0].trim_prefix(prefix);
+		if (!index_string.is_valid_int()) {
+			return nullptr;
+		}
+		*r_index = index_string.to_int();
+	}
+
+	return property_list.getptr(components[1]);
+}
+
+void PropertyListHelper::_bind_property(const Property &p_property, const Object *p_object) {
+	Property property = p_property;
+	property.info = p_property.info;
+	property.default_value = p_property.default_value;
+	property.setter = Callable(p_object, p_property.setter_name);
+	property.getter = Callable(p_object, p_property.getter_name);
+
+	property_list[property.info.name] = property;
+}
+
+void PropertyListHelper::set_prefix(const String &p_prefix) {
+	prefix = p_prefix;
+}
+
+void PropertyListHelper::register_property(const PropertyInfo &p_info, const Variant &p_default, const StringName &p_setter, const StringName &p_getter) {
+	Property property;
+	property.info = p_info;
+	property.default_value = p_default;
+	property.setter_name = p_setter;
+	property.getter_name = p_getter;
+
+	property_list[p_info.name] = property;
+}
+
+void PropertyListHelper::setup_for_instance(const PropertyListHelper &p_base, const Object *p_object) {
+	prefix = p_base.prefix;
+	for (const KeyValue<String, Property> &E : p_base.property_list) {
+		_bind_property(E.value, p_object);
+	}
+}
+
+void PropertyListHelper::get_property_list(List<PropertyInfo> *p_list, int p_count) const {
+	for (int i = 0; i < p_count; i++) {
+		for (const KeyValue<String, Property> &E : property_list) {
+			const Property &property = E.value;
+
+			PropertyInfo info = property.info;
+			if (property.getter.call(i) == property.default_value) {
+				info.usage &= (~PROPERTY_USAGE_STORAGE);
+			}
+
+			info.name = vformat("%s%d/%s", prefix, i, info.name);
+			p_list->push_back(info);
+		}
+	}
+}
+
+bool PropertyListHelper::property_get_value(const String &p_property, Variant &r_ret) const {
+	int index;
+	const Property *property = _get_property(p_property, &index);
+
+	if (property) {
+		r_ret = property->getter.call(index);
+		return true;
+	}
+	return false;
+}
+
+bool PropertyListHelper::property_set_value(const String &p_property, const Variant &p_value) const {
+	int index;
+	const Property *property = _get_property(p_property, &index);
+
+	if (property) {
+		property->setter.call(index, p_value);
+		return true;
+	}
+	return false;
+}
+
+bool PropertyListHelper::property_can_revert(const String &p_property) const {
+	int index;
+	const Property *property = _get_property(p_property, &index);
+
+	if (property) {
+		return property->getter.call(index) != property->default_value;
+	}
+	return false;
+}
+
+bool PropertyListHelper::property_get_revert(const String &p_property, Variant &r_value) const {
+	int index;
+	const Property *property = _get_property(p_property, &index);
+
+	if (property) {
+		r_value = property->default_value;
+		return true;
+	}
+	return false;
+}