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Jorijn van der Graaf 2025-11-06 16:40:53 +01:00
commit c98cbc28dc
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Crafter.Event.cppm
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/*
Crafter®.Event
Copyright (C) 2025 Catcrafts®
Catcrafts.net
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3.0 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
module;
#include <map>
#include <functional>
#include <vector>
#include <algorithm>
export module Crafter.Event;
namespace Crafter {
export template <class T>
class Event;
export template<>
class Event<void>;
export template<typename T>
class EventListener {
public:
int priority;
EventListener();
void SetEvent(Event<T>* eventToListenTo, std::function<void(T)> function, int priority = 0);
EventListener(Event<T>* eventToListenTo, std::function<void(T)> function, int priority = 0);
~EventListener();
Event<T>* eventToListenTo;
std::function<void(T)> function;
};
export template<>
class EventListener<void> {
public:
int priority;
EventListener();
void SetEvent(Event<void>* eventToListenTo, std::function<void()> function, int priority = 0);
EventListener(Event<void>* eventToListenTo, std::function<void()> function, int priority = 0);
~EventListener();
Event<void>* eventToListenTo;
std::function<void()> function;
};
export template<typename T>
class Event {
private:
std::map<int, std::vector<EventListener<T>*>> listeners;
public:
~Event() {
for (const auto& listenerSlice : listeners) {
const std::vector<EventListener<T>*> slice = listenerSlice.second;
for (const auto& listener : slice) {
listener->eventToListenTo = nullptr;
}
}
}
void AddListener(EventListener<T>* listener, int priority = 0) {
if (listeners.contains(priority)) {
listeners[priority].push_back(listener);
}
else {
listeners[priority] = std::vector<EventListener<T>*>{ listener };
}
}
void RemoveListener(EventListener<T>* listener) {
listeners[listener->priority].erase(std::remove(listeners[listener->priority].begin(), listeners[listener->priority].end(), listener), listeners[listener->priority].end());
}
void Invoke(T data) {
for (const auto& listenerSlice : listeners) {
const std::vector<EventListener<T>*> slice = listenerSlice.second;
for (const auto& listener : slice) {
listener->function(data);
}
}
}
};
template<typename T> void EventListener<T>::SetEvent(Event<T>* eventToListenTo, std::function<void(T)> listener, int priority)
{
this->priority = priority;
if (this->eventToListenTo != nullptr) {
eventToListenTo->RemoveListener(this);
}
this->eventToListenTo = eventToListenTo;
eventToListenTo->AddListener(this);
this->function = listener;
}
template<typename T> EventListener<T>::EventListener(Event<T>* eventToListenTo, std::function<void(T)> listener, int priority) : priority(priority), eventToListenTo(eventToListenTo), function(listener) {
eventToListenTo->AddListener(this);
}
template<typename T> EventListener<T>::~EventListener() {
if (eventToListenTo != nullptr) {
eventToListenTo->RemoveListener(this);
}
}
template<typename T> EventListener<T>::EventListener() {
eventToListenTo = nullptr;
}
export template<>
class Event<void> {
private:
std::map<int, std::vector<EventListener<void>*>> listeners;
public:
~Event() {
for (const auto& listenerSlice : listeners) {
const std::vector<EventListener<void>*> slice = listenerSlice.second;
for (const auto& listener : slice) {
listener->eventToListenTo = nullptr;
}
}
}
void AddListener(EventListener<void>* listener, int priority = 0) {
if (listeners.contains(priority)) {
listeners[priority].push_back(listener);
}
else {
listeners[priority] = std::vector<EventListener<void>*>{ listener };
}
}
void RemoveListener(EventListener<void>* listener) {
listeners[listener->priority].erase(std::remove(listeners[listener->priority].begin(), listeners[listener->priority].end(), listener), listeners[listener->priority].end());
}
void Invoke() {
for (const auto& listenerSlice : listeners) {
const std::vector<EventListener<void>*> slice = listenerSlice.second;
for (const auto& listener : slice) {
listener->function();
}
}
}
};
void EventListener<void>::SetEvent(Event<void>* eventToListenTo, std::function<void()> listener, int priority)
{
this->priority = priority;
if (this->eventToListenTo != nullptr) {
eventToListenTo->RemoveListener(this);
}
this->eventToListenTo = eventToListenTo;
eventToListenTo->AddListener(this);
this->function = listener;
}
EventListener<void>::EventListener(Event<void>* eventToListenTo, std::function<void()> listener, int priority) : priority(priority), eventToListenTo(eventToListenTo), function(listener) {
eventToListenTo->AddListener(this);
}
EventListener<void>::~EventListener() {
if (eventToListenTo != nullptr) {
eventToListenTo->RemoveListener(this);
}
}
EventListener<void>::EventListener() {
eventToListenTo = nullptr;
}
}