125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
#pragma once
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#include <hex.hpp>
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#include <list>
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#include <map>
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#include <string_view>
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#include <functional>
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#include <hex/api/imhex_api.hpp>
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#define EVENT_DEF(event_name, ...) \
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struct event_name final : public hex::Event<__VA_ARGS__> { \
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constexpr static auto id = [] { return hex::EventId(); }(); \
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explicit event_name(Callback func) noexcept : Event(std::move(func)) { } \
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}
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class GLFWwindow;
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namespace hex {
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class EventId {
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public:
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explicit constexpr EventId(const char *func = __builtin_FUNCTION(), u32 line = __builtin_LINE()) {
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this->m_hash = line ^ 123456789;
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for (auto c : std::string_view(func)) {
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this->m_hash = (this->m_hash >> 5) | (this->m_hash << 27);
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this->m_hash ^= c;
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}
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}
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constexpr bool operator ==(const EventId &rhs) const = default;
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private:
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u32 m_hash;
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};
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struct EventBase {
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EventBase() noexcept = default;
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};
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template<typename ... Params>
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struct Event : public EventBase {
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using Callback = std::function<void(Params...)>;
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explicit Event(Callback func) noexcept : m_func(std::move(func)) {}
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void operator()(Params... params) const noexcept {
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this->m_func(params...);
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}
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private:
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Callback m_func;
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};
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class EventManager {
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public:
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using EventList = std::list<std::pair<EventId, EventBase*>>;
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template<typename E>
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[[nodiscard]] static EventList::iterator subscribe(typename E::Callback function) {
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return s_events.insert(s_events.end(), std::make_pair(E::id, new E(function)));
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}
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template<typename E>
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static void subscribe(void *token, typename E::Callback function) {
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s_tokenStore.insert(std::make_pair(token, subscribe<E>(function)));
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}
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static void unsubscribe(EventList::iterator iter) noexcept {
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s_events.remove(*iter);
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}
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template<typename E>
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static void unsubscribe(void *token) noexcept {
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auto iter = std::find_if(s_tokenStore.begin(), s_tokenStore.end(), [&](auto &item){
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return item.first == token && item.second->first == E::id;
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});
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if (iter != s_tokenStore.end()) {
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s_events.remove(*iter->second);
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}
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}
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template<typename E>
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static void post(auto&& ... args) noexcept {
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for (const auto &[id, event] : s_events) {
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if (id == E::id)
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(*reinterpret_cast<E *>(event))(std::forward<decltype(args)>(args)...);
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}
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}
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private:
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static std::map<void*, EventList::iterator> s_tokenStore;
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static EventList s_events;
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};
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/* Default Events */
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EVENT_DEF(EventFileLoaded, std::string);
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EVENT_DEF(EventFileUnloaded);
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EVENT_DEF(EventDataChanged);
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EVENT_DEF(EventPatternChanged);
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EVENT_DEF(EventWindowClosing, GLFWwindow*);
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EVENT_DEF(EventRegionSelected, Region);
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EVENT_DEF(EventProjectFileStore);
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EVENT_DEF(EventProjectFileLoad);
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EVENT_DEF(EventSettingsChanged);
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EVENT_DEF(EventAbnormalTermination, int);
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EVENT_DEF(EventOSThemeChanged);
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EVENT_DEF(EventProviderCreated, prv::Provider*);
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EVENT_DEF(RequestOpenWindow, std::string);
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EVENT_DEF(RequestSelectionChange, Region);
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EVENT_DEF(RequestAddBookmark, ImHexApi::Bookmarks::Entry);
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EVENT_DEF(RequestSetPatternLanguageCode, std::string);
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EVENT_DEF(RequestChangeWindowTitle, std::string);
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EVENT_DEF(RequestCloseImHex, bool);
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EVENT_DEF(RequestOpenFile, std::string);
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EVENT_DEF(RequestChangeTheme, u32);
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EVENT_DEF(RequestOpenPopup, std::string);
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EVENT_DEF(RequestCreateProvider, std::string, hex::prv::Provider **);
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EVENT_DEF(QuerySelection, Region&);
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} |