Add named events

openVulkanoCpp/Base/Event.cpp

@@ -0,0 +1,12 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "Event.hpp"
+
+namespace openVulkanoCpp
+{
+	std::vector<INamedEventProcessor*> INamedEventProcessor::processors;
+}

openVulkanoCpp/Base/Event.hpp

@@ -10,6 +10,8 @@
 #include <memory>
 #include <mutex>
 #include <shared_mutex>
+#include <string>
+#include <variant>
 #include <vector>
 
 namespace openVulkanoCpp
@@ -21,6 +23,34 @@ namespace openVulkanoCpp
 		virtual void SetInvalid() = 0;
 	};
 
+	class INamedEventProcessor
+	{
+		static std::vector<INamedEventProcessor*> processors;
+
+	public:
+		// Keep this in sync with all implementations! synctag: NamedEventProcessor_Parameters_SYNC_TAG
+		typedef std::variant<std::string, bool, int, float, double> Parameters;
+
+		static bool HasProcessor() { return !processors.empty(); }
+
+		static void NotifyAll(const std::string& eventName, const std::vector<Parameters>& parameters)
+		{
+			for(const auto& processor : processors)
+			{
+				processor->Notify(eventName, parameters);
+			}
+		}
+
+		INamedEventProcessor() { processors.push_back(this); }
+
+		virtual ~INamedEventProcessor()
+		{
+			processors.erase(std::remove_if(processors.begin(), processors.end(), [this](auto v) { return v==this; }), processors.end());
+		}
+
+		virtual void Notify(const std::string& eventName, const std::vector<Parameters>& parameters) const = 0;
+	};
+
 	template<typename... Arguments>
 	class Event final
 	{
@@ -29,7 +59,7 @@ namespace openVulkanoCpp
 
 
 	private:
-		enum class EventHandlerType { STATIC, INSTANCED, INSTANCED_SHARED_PTR, INSTANCED_WEAK_PTR, FUNCTIONAL };
+		enum class EventHandlerType { STATIC, INSTANCED, INSTANCED_SHARED_PTR, INSTANCED_WEAK_PTR, FUNCTIONAL, NAMED };
 
 		//region Event Handlers
 		class EventHandler : public IEventHandler
@@ -184,6 +214,33 @@ namespace openVulkanoCpp
 		private:
 			Function function;
 		};
+
+		class NamedEventHandler final : public EventHandler
+		{
+			std::string m_name;
+
+		public:
+			NamedEventHandler(const std::string& name) :
+					EventHandler(EventHandlerType::NAMED), m_name(name)
+			{}
+
+			void Notify(Arguments... args) const override
+			{
+				if (INamedEventProcessor::HasProcessor())
+				{
+					std::vector<INamedEventProcessor::Parameters> attributes;
+					attributes.reserve(sizeof...(Arguments));
+					(attributes.emplace_back(args), ...);
+					INamedEventProcessor::NotifyAll(m_name, attributes);
+				}
+			}
+
+		protected:
+			bool ShouldDelete(EventHandler* other) const override
+			{
+				return false;
+			}
+		};
 		//endregion
 
 		std::vector<std::unique_ptr<EventHandler>> handlers;
@@ -215,6 +272,17 @@ namespace openVulkanoCpp
 		}
 
 	public:
+		Event() = default;
+
+		Event(const std::string& name)
+		{
+			RegisterName(name);
+		}
+
+		Event(const Event& event) = default;
+
+		Event(Event&& event) = default;
+
 		[[nodiscard]] bool HasHandlers() const
 		{
 			return !handlers.empty();
@@ -235,6 +303,11 @@ namespace openVulkanoCpp
 			NotifyAll(std::forward<Arguments>(args)...);
 		}
 
+		IEventHandler* RegisterName(const std::string& name)
+		{
+			return Add(new NamedEventHandler(name));
+		}
+
 		template<class Instance, class Method>
 		IEventHandler* RegisterHandler(Instance* instance, Method method)
 		{
@@ -391,4 +464,4 @@ namespace openVulkanoCpp
 	{
 		return std::pair<std::weak_ptr<Instance>, Method>(instance, method);
 	}
-}
+}

openVulkanoCpp/Host/iOS/NamedEventProcessor.h

@@ -0,0 +1,23 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Base/Event.hpp"
+
+namespace openVulkanoCpp
+{
+	class NamedEventProcessor final : public INamedEventProcessor
+	{
+		std::vector<std::string> m_classNamePrefixes;
+	public:
+		NamedEventProcessor() { RegisterClassNamePrefix(""); }
+
+		void RegisterClassNamePrefix(const std::string& prefix) { m_classNamePrefixes.push_back(prefix); }
+
+		void Notify(const std::string& eventName, const std::vector<Parameters>& parameters) const override;
+	};
+}

openVulkanoCpp/Host/iOS/NamedEventProcessor.mm

@@ -0,0 +1,150 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "NamedEventProcessor.h"
+#include "Base/Logger.hpp"
+#include <map>
+#include <typeindex>
+
+#import <Foundation/Foundation.h>
+#import <objc/runtime.h>
+
+namespace openVulkanoCpp
+{
+	namespace
+	{
+		NamedEventProcessor appleNotificationNamedEventProcessor;
+	
+		constexpr int LONGEST_TYPE_NAME = std::max({ sizeof(@encode(NSString*)), sizeof(@encode(BOOL)), sizeof(@encode(int)), sizeof(@encode(float)), sizeof(@encode(double)) });
+	
+		std::map<std::type_index, std::string> TYPE_NAME_MAP = {
+				{ std::type_index(typeid(std::string)), @encode(NSString*) },
+				{ std::type_index(typeid(bool)), @encode(BOOL) },
+				{ std::type_index(typeid(int)), @encode(int) },
+				{ std::type_index(typeid(float)), @encode(float) },
+				{ std::type_index(typeid(double)), @encode(double) }
+		};
+
+		// Keep this in sync with INamedEventProcessor! synctag: NamedEventProcessor_Parameters_SYNC_TAG
+		union ParameterValue
+		{
+			NSString* string;
+			BOOL boolean;
+			int integer;
+			float fp32;
+			double fp64;
+		};
+
+		std::string BuildTypeName(const std::vector<INamedEventProcessor::Parameters>& parameters)
+		{
+			std::string typeName("@:");
+			typeName.reserve(2 + parameters.size() * (LONGEST_TYPE_NAME + 2));
+			for(const auto& parameter : parameters)
+			{
+				typeName.append(std::visit([](auto&& arg) {
+					return TYPE_NAME_MAP.find(typeid(std::decay_t<decltype(arg)>))->second;
+				}, parameter));
+			}
+			return typeName;
+		}
+
+		template <typename T>
+		ParameterValue CreateValue(const T& parameter)
+		{
+			ParameterValue value;
+			reinterpret_cast<T&>(value) = parameter;
+			return value;
+		}
+	
+		ParameterValue CreateValue(const std::string& parameter)
+		{
+			ParameterValue value;
+			value.string = [NSString stringWithUTF8String:parameter.c_str()];
+			return value;
+		}
+
+		std::string SelectorType(Method m)
+		{
+			std::string sig;
+			for (auto i = 0u, count = method_getNumberOfArguments(m); i < count; ++i)
+			{
+				auto argType = method_copyArgumentType(m, i);
+				sig += std::string(argType);
+				free(argType);
+			}
+			return sig;
+		}
+
+		SEL GetInitForClass(Class c, const std::string &initType)
+		{
+			SEL init = nullptr;
+			for (auto clazz = c; !init && clazz; clazz = class_getSuperclass(clazz))
+			{
+				if (Method *methods = class_copyMethodList(clazz, nullptr))
+				{
+					for (int i = 0; methods[i]; i++)
+					{
+						const std::string name = sel_getName(method_getName(methods[i]));
+						const std::string type = SelectorType(methods[i]);
+						if (0 == name.find("init") && type == initType)
+						{
+							init = method_getName(methods[i]);
+							break;
+						}
+					}
+					free(methods);
+				}
+			}
+			return init;
+		}
+
+		Class FindGenericEventClass(const std::vector<std::string>& prefixes, const std::string& eventName)
+		{
+			for (const std::string& prefix : prefixes)
+			{
+				// look for class in all registered class prefixes
+				NSString* eventClassName = [NSString stringWithUTF8String:(prefix + eventName).c_str()];
+				if (Class eventClass = NSClassFromString(eventClassName))
+				{
+					return eventClass;
+				}
+			}
+			return nullptr;
+		}
+	}
+
+	void NamedEventProcessor::Notify(const std::string& eventName, const std::vector<Parameters>& parameters) const
+	{
+		if (auto eventClass = FindGenericEventClass(m_classNamePrefixes, eventName))
+		{
+			if (auto init = GetInitForClass(eventClass, BuildTypeName(parameters)))
+			{
+				auto event = [eventClass alloc];
+				auto inv = [NSInvocation invocationWithMethodSignature:[event methodSignatureForSelector:init]];
+				[inv setTarget:event];
+				[inv setSelector:init];
+				for (int i = 0; i < parameters.size(); i++)
+				{
+					auto arg = std::visit([](auto&& arg) { return CreateValue(arg); }, parameters[i]);
+					[inv setArgument:&arg atIndex:(i + 2)];
+				}
+				[inv invoke];
+				for (Class clazz = eventClass; clazz && clazz != NSObject.class; clazz = class_getSuperclass(clazz))
+				{
+					[[NSNotificationCenter defaultCenter] postNotificationName:NSStringFromClass(clazz) object:event userInfo:nil];
+				}
+			}
+			else
+			{
+				Logger::MANAGER->error("Cannot find viable constructor for event %s", eventName.c_str());
+			}
+		}
+		else
+		{
+			Logger::MANAGER->debug("Cannot find implementation for event %s", eventName);
+		}
+	}
+}