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polybar/include/events/signal_receiver.hpp
2017-01-24 07:11:14 +01:00

52 lines
1.2 KiB
C++

#pragma once
#include <map>
#include <unordered_map>
#include <typeindex>
#include <typeinfo>
#include "common.hpp"
POLYBAR_NS
class signal_receiver_interface {
public:
using prio = int;
using prio_map = std::multimap<prio, signal_receiver_interface*>;
virtual ~signal_receiver_interface() {}
virtual prio priority() const = 0;
template <typename Signal>
bool on(const Signal& signal);
};
template <typename Signal>
class signal_receiver_impl {
public:
virtual ~signal_receiver_impl() {}
virtual bool on(const Signal&) = 0;
};
template <typename Signal>
bool signal_receiver_interface::on(const Signal& s) {
auto event_sink = dynamic_cast<signal_receiver_impl<Signal>*>(this);
if (event_sink != nullptr && event_sink->on(s)) {
return true;
} else {
return false;
}
}
template <int Priority, typename Signal, typename... Signals>
class signal_receiver : public signal_receiver_interface,
public signal_receiver_impl<Signal>,
public signal_receiver_impl<Signals>... {
public:
prio priority() const {
return Priority;
}
};
using signal_receivers_t = std::unordered_map<std::type_index, signal_receiver_interface::prio_map>;
POLYBAR_NS_END