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