godot/core/callable.cpp

358 lines
10 KiB
C++

/*************************************************************************/
/* 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() {
}