358 lines
10 KiB
C++
358 lines
10 KiB
C++
/*************************************************************************/
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/* callable.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "callable.h"
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#include "core/script_language.h"
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#include "message_queue.h"
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#include "object.h"
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#include "reference.h"
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void Callable::call_deferred(const Variant **p_arguments, int p_argcount) const {
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MessageQueue::get_singleton()->push_callable(*this, p_arguments, p_argcount);
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}
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void Callable::call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, CallError &r_call_error) const {
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if (is_null()) {
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r_call_error.error = CallError::CALL_ERROR_INSTANCE_IS_NULL;
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r_call_error.argument = 0;
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r_call_error.expected = 0;
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r_return_value = Variant();
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} else if (is_custom()) {
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custom->call(p_arguments, p_argcount, r_return_value, r_call_error);
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} else {
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Object *obj = ObjectDB::get_instance(ObjectID(object));
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r_return_value = obj->call(method, p_arguments, p_argcount, r_call_error);
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}
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}
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Object *Callable::get_object() const {
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if (is_null()) {
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return nullptr;
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} else if (is_custom()) {
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return ObjectDB::get_instance(custom->get_object());
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} else {
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return ObjectDB::get_instance(ObjectID(object));
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}
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}
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ObjectID Callable::get_object_id() const {
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if (is_null()) {
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return ObjectID();
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} else if (is_custom()) {
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return custom->get_object();
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} else {
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return ObjectID(object);
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}
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}
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StringName Callable::get_method() const {
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ERR_FAIL_COND_V(is_custom(), StringName());
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return method;
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}
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uint32_t Callable::hash() const {
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if (is_custom()) {
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return custom->hash();
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} else {
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uint32_t hash = method.hash();
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return hash_djb2_one_64(object, hash);
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}
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}
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bool Callable::operator==(const Callable &p_callable) const {
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bool custom_a = is_custom();
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bool custom_b = p_callable.is_custom();
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if (custom_a == custom_b) {
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if (custom_a) {
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if (custom == p_callable.custom) {
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return true; //same pointer, dont even compare
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}
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CallableCustom::CompareEqualFunc eq_a = custom->get_compare_equal_func();
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CallableCustom::CompareEqualFunc eq_b = p_callable.custom->get_compare_equal_func();
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if (eq_a == eq_b) {
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return eq_a(custom, p_callable.custom);
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} else {
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return false;
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}
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} else {
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return object == p_callable.object && method == p_callable.method;
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}
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} else {
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return false;
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}
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}
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bool Callable::operator!=(const Callable &p_callable) const {
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return !(*this == p_callable);
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}
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bool Callable::operator<(const Callable &p_callable) const {
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bool custom_a = is_custom();
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bool custom_b = p_callable.is_custom();
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if (custom_a == custom_b) {
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if (custom_a) {
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if (custom == p_callable.custom) {
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return false; //same pointer, dont even compare
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}
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CallableCustom::CompareLessFunc less_a = custom->get_compare_less_func();
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CallableCustom::CompareLessFunc less_b = p_callable.custom->get_compare_less_func();
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if (less_a == less_b) {
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return less_a(custom, p_callable.custom);
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} else {
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return less_a < less_b; //it's something..
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}
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} else {
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if (object == p_callable.object) {
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return method < p_callable.method;
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} else {
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return object < p_callable.object;
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}
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}
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} else {
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return int(custom_a ? 1 : 0) < int(custom_b ? 1 : 0);
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}
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}
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void Callable::operator=(const Callable &p_callable) {
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if (is_custom()) {
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if (p_callable.is_custom()) {
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if (custom == p_callable.custom) {
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return;
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}
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}
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if (custom->ref_count.unref()) {
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memdelete(custom);
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}
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}
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if (p_callable.is_custom()) {
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method = StringName();
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if (!p_callable.custom->ref_count.ref()) {
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object = 0;
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} else {
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object = 0;
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custom = p_callable.custom;
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}
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} else {
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method = p_callable.method;
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object = p_callable.object;
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}
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}
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Callable::operator String() const {
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if (is_custom()) {
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return custom->get_as_text();
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} else {
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if (is_null()) {
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return "null::null";
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}
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Object *base = get_object();
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if (base) {
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String class_name = base->get_class();
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Ref<Script> script = base->get_script();
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if (script.is_valid() && script->get_path().is_resource_file()) {
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class_name += "(" + script->get_path().get_file() + ")";
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}
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return class_name + "::" + String(method);
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} else {
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return "null::" + String(method);
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}
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}
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}
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Callable::Callable(const Object *p_object, const StringName &p_method) {
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if (p_method == StringName()) {
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object = 0;
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ERR_FAIL_MSG("Method argument to Callable constructor must be a non-empty string");
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}
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if (p_object == nullptr) {
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object = 0;
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ERR_FAIL_MSG("Object argument to Callable constructor must be non-null");
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}
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object = p_object->get_instance_id();
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method = p_method;
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}
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Callable::Callable(ObjectID p_object, const StringName &p_method) {
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if (p_method == StringName()) {
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object = 0;
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ERR_FAIL_MSG("Method argument to Callable constructor must be a non-empty string");
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}
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object = p_object;
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method = p_method;
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}
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Callable::Callable(CallableCustom *p_custom) {
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if (p_custom->referenced) {
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object = 0;
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ERR_FAIL_MSG("Callable custom is already referenced");
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}
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p_custom->referenced = true;
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object = 0; //ensure object is all zero, since pointer may be 32 bits
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custom = p_custom;
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}
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Callable::Callable(const Callable &p_callable) {
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if (p_callable.is_custom()) {
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if (!p_callable.custom->ref_count.ref()) {
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object = 0;
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} else {
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object = 0;
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custom = p_callable.custom;
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}
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} else {
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method = p_callable.method;
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object = p_callable.object;
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}
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}
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Callable::~Callable() {
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if (is_custom()) {
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if (custom->ref_count.unref()) {
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memdelete(custom);
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}
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}
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}
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Callable::Callable() {
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object = 0;
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}
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CallableCustom::CallableCustom() {
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referenced = false;
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ref_count.init();
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}
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//////////////////////////////////
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Object *Signal::get_object() const {
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return ObjectDB::get_instance(object);
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}
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ObjectID Signal::get_object_id() const {
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return object;
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}
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StringName Signal::get_name() const {
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return name;
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}
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bool Signal::operator==(const Signal &p_signal) const {
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return object == p_signal.object && name == p_signal.name;
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}
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bool Signal::operator!=(const Signal &p_signal) const {
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return object != p_signal.object || name != p_signal.name;
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}
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bool Signal::operator<(const Signal &p_signal) const {
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if (object == p_signal.object) {
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return name < p_signal.name;
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} else {
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return object < p_signal.object;
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}
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}
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Signal::operator String() const {
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Object *base = get_object();
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if (base) {
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String class_name = base->get_class();
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Ref<Script> script = base->get_script();
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if (script.is_valid() && script->get_path().is_resource_file()) {
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class_name += "(" + script->get_path().get_file() + ")";
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}
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return class_name + "::[signal]" + String(name);
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} else {
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return "null::[signal]" + String(name);
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}
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}
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Error Signal::emit(const Variant **p_arguments, int p_argcount) const {
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Object *obj = ObjectDB::get_instance(object);
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if (!obj) {
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return ERR_INVALID_DATA;
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}
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return obj->emit_signal(name, p_arguments, p_argcount);
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}
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Error Signal::connect(const Callable &p_callable, const Vector<Variant> &p_binds, uint32_t p_flags) {
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Object *object = get_object();
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ERR_FAIL_COND_V(!object, ERR_UNCONFIGURED);
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return object->connect(name, p_callable, p_binds, p_flags);
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}
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void Signal::disconnect(const Callable &p_callable) {
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Object *object = get_object();
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ERR_FAIL_COND(!object);
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object->disconnect(name, p_callable);
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}
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bool Signal::is_connected(const Callable &p_callable) const {
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Object *object = get_object();
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ERR_FAIL_COND_V(!object, false);
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return object->is_connected(name, p_callable);
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}
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Array Signal::get_connections() const {
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Object *object = get_object();
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if (!object) {
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return Array();
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}
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List<Object::Connection> connections;
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object->get_signal_connection_list(name, &connections);
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Array arr;
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for (List<Object::Connection>::Element *E = connections.front(); E; E = E->next()) {
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arr.push_back(E->get());
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}
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return arr;
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}
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Signal::Signal(const Object *p_object, const StringName &p_name) {
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ERR_FAIL_COND_MSG(p_object == nullptr, "Object argument to Signal constructor must be non-null");
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object = p_object->get_instance_id();
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name = p_name;
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}
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Signal::Signal(ObjectID p_object, const StringName &p_name) {
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object = p_object;
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name = p_name;
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}
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Signal::Signal() {
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}
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