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+/*************************************************************************/
+/* callable.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
+/* */
+/* 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 "callable.h"
+#include "core/script_language.h"
+#include "message_queue.h"
+#include "object.h"
+#include "reference.h"
+
+void Callable::call_deferred(const Variant **p_arguments, int p_argcount) const {
+ MessageQueue::get_singleton()->push_callable(*this, p_arguments, p_argcount);
+}
+
+void Callable::call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, CallError &r_call_error) const {
+
+ if (is_null()) {
+ r_call_error.error = CallError::CALL_ERROR_INSTANCE_IS_NULL;
+ r_call_error.argument = 0;
+ r_call_error.expected = 0;
+ r_return_value = Variant();
+ } else if (is_custom()) {
+ custom->call(p_arguments, p_argcount, r_return_value, r_call_error);
+ } else {
+ Object *obj = ObjectDB::get_instance(ObjectID(object));
+ r_return_value = obj->call(method, p_arguments, p_argcount, r_call_error);
+ }
+}
+
+Object *Callable::get_object() const {
+ if (is_null()) {
+ return nullptr;
+ } else if (is_custom()) {
+ return ObjectDB::get_instance(custom->get_object());
+ } else {
+ return ObjectDB::get_instance(ObjectID(object));
+ }
+}
+
+ObjectID Callable::get_object_id() const {
+ if (is_null()) {
+ return ObjectID();
+ } else if (is_custom()) {
+ return custom->get_object();
+ } else {
+ return ObjectID(object);
+ }
+}
+StringName Callable::get_method() const {
+ ERR_FAIL_COND_V(is_custom(), StringName());
+ return method;
+}
+uint32_t Callable::hash() const {
+ if (is_custom()) {
+ return custom->hash();
+ } else {
+ uint32_t hash = method.hash();
+ return hash_djb2_one_64(object, hash);
+ }
+}
+
+bool Callable::operator==(const Callable &p_callable) const {
+ bool custom_a = is_custom();
+ bool custom_b = p_callable.is_custom();
+
+ if (custom_a == custom_b) {
+ if (custom_a) {
+ if (custom == p_callable.custom) {
+ return true; //same pointer, dont even compare
+ }
+
+ CallableCustom::CompareEqualFunc eq_a = custom->get_compare_equal_func();
+ CallableCustom::CompareEqualFunc eq_b = p_callable.custom->get_compare_equal_func();
+ if (eq_a == eq_b) {
+ return eq_a(custom, p_callable.custom);
+ } else {
+ return false;
+ }
+ } else {
+ return object == p_callable.object && method == p_callable.method;
+ }
+ } else {
+ return false;
+ }
+}
+bool Callable::operator!=(const Callable &p_callable) const {
+ return !(*this == p_callable);
+}
+bool Callable::operator<(const Callable &p_callable) const {
+ bool custom_a = is_custom();
+ bool custom_b = p_callable.is_custom();
+
+ if (custom_a == custom_b) {
+ if (custom_a) {
+ if (custom == p_callable.custom) {
+ return false; //same pointer, dont even compare
+ }
+
+ CallableCustom::CompareLessFunc less_a = custom->get_compare_less_func();
+ CallableCustom::CompareLessFunc less_b = p_callable.custom->get_compare_less_func();
+ if (less_a == less_b) {
+ return less_a(custom, p_callable.custom);
+ } else {
+ return less_a < less_b; //it's something..
+ }
+
+ } else {
+ if (object == p_callable.object) {
+ return method < p_callable.method;
+ } else {
+ return object < p_callable.object;
+ }
+ }
+ } else {
+ return int(custom_a ? 1 : 0) < int(custom_b ? 1 : 0);
+ }
+}
+
+void Callable::operator=(const Callable &p_callable) {
+ if (is_custom()) {
+ if (p_callable.is_custom()) {
+ if (custom == p_callable.custom) {
+ return;
+ }
+ }
+
+ if (custom->ref_count.unref()) {
+ memdelete(custom);
+ }
+ }
+
+ if (p_callable.is_custom()) {
+ method = StringName();
+ if (!p_callable.custom->ref_count.ref()) {
+ object = 0;
+ } else {
+ object = 0;
+ custom = p_callable.custom;
+ }
+ } else {
+ method = p_callable.method;
+ object = p_callable.object;
+ }
+}
+
+Callable::operator String() const {
+
+ if (is_custom()) {
+ return custom->get_as_text();
+ } else {
+ if (is_null()) {
+ return "null::null";
+ }
+
+ Object *base = get_object();
+ if (base) {
+ String class_name = base->get_class();
+ Ref<Script> script = base->get_script();
+ if (script.is_valid() && script->get_path().is_resource_file()) {
+
+ class_name += "(" + script->get_path().get_file() + ")";
+ }
+ return class_name + "::" + String(method);
+ } else {
+ return "null::" + String(method);
+ }
+ }
+}
+
+Callable::Callable(const Object *p_object, const StringName &p_method) {
+ if (p_method == StringName()) {
+ object = 0;
+ ERR_FAIL_MSG("Method argument to Callable constructor must be a non-empty string");
+ }
+ if (p_object == nullptr) {
+ object = 0;
+ ERR_FAIL_MSG("Object argument to Callable constructor must be non-null");
+ }
+
+ object = p_object->get_instance_id();
+ method = p_method;
+}
+
+Callable::Callable(ObjectID p_object, const StringName &p_method) {
+ if (p_method == StringName()) {
+ object = 0;
+ ERR_FAIL_MSG("Method argument to Callable constructor must be a non-empty string");
+ }
+
+ object = p_object;
+ method = p_method;
+}
+Callable::Callable(CallableCustom *p_custom) {
+ if (p_custom->referenced) {
+ object = 0;
+ ERR_FAIL_MSG("Callable custom is already referenced");
+ }
+ p_custom->referenced = true;
+ object = 0; //ensure object is all zero, since pointer may be 32 bits
+ custom = p_custom;
+}
+Callable::Callable(const Callable &p_callable) {
+ if (p_callable.is_custom()) {
+ if (!p_callable.custom->ref_count.ref()) {
+ object = 0;
+ } else {
+ object = 0;
+ custom = p_callable.custom;
+ }
+ } else {
+ method = p_callable.method;
+ object = p_callable.object;
+ }
+}
+
+Callable::~Callable() {
+ if (is_custom()) {
+ if (custom->ref_count.unref()) {
+ memdelete(custom);
+ }
+ }
+}
+
+Callable::Callable() {
+ object = 0;
+}
+
+CallableCustom::CallableCustom() {
+ referenced = false;
+ ref_count.init();
+}
+
+//////////////////////////////////
+
+Object *Signal::get_object() const {
+ return ObjectDB::get_instance(object);
+}
+ObjectID Signal::get_object_id() const {
+ return object;
+}
+StringName Signal::get_name() const {
+ return name;
+}
+
+bool Signal::operator==(const Signal &p_signal) const {
+ return object == p_signal.object && name == p_signal.name;
+}
+
+bool Signal::operator!=(const Signal &p_signal) const {
+ return object != p_signal.object || name != p_signal.name;
+}
+
+bool Signal::operator<(const Signal &p_signal) const {
+ if (object == p_signal.object) {
+ return name < p_signal.name;
+ } else {
+ return object < p_signal.object;
+ }
+}
+
+Signal::operator String() const {
+ Object *base = get_object();
+ if (base) {
+ String class_name = base->get_class();
+ Ref<Script> script = base->get_script();
+ if (script.is_valid() && script->get_path().is_resource_file()) {
+
+ class_name += "(" + script->get_path().get_file() + ")";
+ }
+ return class_name + "::[signal]" + String(name);
+ } else {
+ return "null::[signal]" + String(name);
+ }
+}
+
+Error Signal::emit(const Variant **p_arguments, int p_argcount) const {
+ Object *obj = ObjectDB::get_instance(object);
+ if (!obj) {
+ return ERR_INVALID_DATA;
+ }
+
+ return obj->emit_signal(name, p_arguments, p_argcount);
+}
+Error Signal::connect(const Callable &p_callable, const Vector<Variant> &p_binds, uint32_t p_flags) {
+
+ Object *object = get_object();
+ ERR_FAIL_COND_V(!object, ERR_UNCONFIGURED);
+
+ return object->connect(name, p_callable, p_binds, p_flags);
+}
+void Signal::disconnect(const Callable &p_callable) {
+ Object *object = get_object();
+ ERR_FAIL_COND(!object);
+ object->disconnect(name, p_callable);
+}
+bool Signal::is_connected(const Callable &p_callable) const {
+ Object *object = get_object();
+ ERR_FAIL_COND_V(!object, false);
+
+ return object->is_connected(name, p_callable);
+}
+
+Array Signal::get_connections() const {
+ Object *object = get_object();
+ if (!object) {
+ return Array();
+ }
+
+ List<Object::Connection> connections;
+ object->get_signal_connection_list(name, &connections);
+
+ Array arr;
+ for (List<Object::Connection>::Element *E = connections.front(); E; E = E->next()) {
+ arr.push_back(E->get());
+ }
+ return arr;
+}
+Signal::Signal(const Object *p_object, const StringName &p_name) {
+
+ ERR_FAIL_COND_MSG(p_object == nullptr, "Object argument to Signal constructor must be non-null");
+
+ object = p_object->get_instance_id();
+ name = p_name;
+}
+Signal::Signal(ObjectID p_object, const StringName &p_name) {
+
+ object = p_object;
+ name = p_name;
+}
+Signal::Signal() {
+}
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