mirror of
https://github.com/vcmi/vcmi.git
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135 lines
2.8 KiB
C++
135 lines
2.8 KiB
C++
/*
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* SubscriptionRegistryProxy.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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#include <vcmi/events/Event.h>
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#include <vcmi/events/EventBus.h>
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#include <vcmi/events/SubscriptionRegistry.h>
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#include "../../LuaWrapper.h"
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#include "../../LuaStack.h"
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#include "../../LuaReference.h"
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VCMI_LIB_NAMESPACE_BEGIN
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namespace scripting
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{
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namespace api
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{
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namespace events
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{
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class EventSubscriptionProxy : public UniqueOpaqueWrapper<::events::EventSubscription, EventSubscriptionProxy>
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{
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public:
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using Wrapper = UniqueOpaqueWrapper<::events::EventSubscription, EventSubscriptionProxy>;
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static const std::vector<typename Wrapper::CustomRegType> REGISTER_CUSTOM;
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};
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template <typename EventProxy>
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class SubscriptionRegistryProxy
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{
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public:
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using EventType = typename EventProxy::ObjectType;
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using RegistryType = ::events::SubscriptionRegistry<EventType>;
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static_assert(std::is_base_of<::events::Event, EventType>::value, "Invalid template parameter");
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static int subscribeBefore(lua_State * L)
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{
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LuaStack S(L);
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// subscription = subscribeBefore(eventBus, callback)
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//TODO: use capture by move from c++14
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auto callbackRef = std::make_shared<LuaReference>(L);
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::events::EventBus * eventBus = nullptr;
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if(!S.tryGet(1, eventBus))
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{
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S.push("No event bus");
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return 1;
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}
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S.clear();
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RegistryType * registry = EventType::getRegistry();
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typename EventType::PreHandler callback = [=](EventType & event)
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{
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LuaStack S(L);
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callbackRef->push();
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S.push(&event);
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if(lua_pcall(L, 1, 0, 0) != 0)
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{
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std::string msg;
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S.tryGet(1, msg);
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logMod->error("Script callback error: %s", msg);
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}
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S.clear();
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};
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std::unique_ptr<::events::EventSubscription> subscription = registry->subscribeBefore(eventBus, std::move(callback));
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S.push(std::move(subscription));
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return 1;
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}
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static int subscribeAfter(lua_State * L)
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{
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LuaStack S(L);
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//TODO: use capture by move from c++14
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auto callbackRef = std::make_shared<LuaReference>(L);
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::events::EventBus * eventBus = nullptr;
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if(!S.tryGet(1, eventBus))
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{
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S.push("No event bus");
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return 1;
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}
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S.clear();
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RegistryType * registry = EventType::getRegistry();
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typename EventType::PostHandler callback = [=](const EventType & event)
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{
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LuaStack S(L);
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callbackRef->push();
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S.push(const_cast<EventType *>(&event)); //FIXME:
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if(lua_pcall(L, 1, 0, 0) != 0)
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{
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std::string msg;
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S.tryGet(1, msg);
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logMod->error("Script callback error: %s", msg);
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}
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S.clear();
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};
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std::unique_ptr<::events::EventSubscription> subscription = registry->subscribeAfter(eventBus, std::move(callback));
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S.push(std::move(subscription));
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return 1;
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}
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};
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}
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}
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}
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VCMI_LIB_NAMESPACE_END
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