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#include "cru/platform/gui/sdl/UiApplication.h"
#include "cru/base/Base.h"
#include "cru/platform/graphics/Factory.h"
#include "cru/platform/gui/sdl/Base.h"
#include "cru/platform/gui/sdl/Window.h"
#include <SDL3/SDL_events.h>
#include <SDL3/SDL_init.h>
#include <SDL3/SDL_timer.h>
#include <algorithm>
#include <chrono>
#include <functional>
#include <optional>
namespace cru::platform::gui::sdl {
SdlUiApplication::SdlUiApplication(graphics::IGraphicsFactory* graphics_factory,
bool release_graphics_factory)
: graphics_factory_(graphics_factory),
release_graphics_factory_(release_graphics_factory),
quit_code_(0) {
CheckSdlReturn(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS));
empty_event_type_ = SDL_RegisterEvents(1);
}
SdlUiApplication::~SdlUiApplication() {
SDL_Quit();
delete_later_pool_.Clean();
if (release_graphics_factory_) {
delete graphics_factory_;
}
}
int SdlUiApplication::Run() {
while (true) {
if (auto result = timers_.Update(std::chrono::steady_clock::now())) {
result->data();
continue;
}
auto timeout = timers_.NextTimeout(std::chrono::steady_clock::now());
SDL_Event event;
CheckSdlReturn(timeout ? SDL_WaitEventTimeout(&event, timeout->count())
: SDL_WaitEvent(&event));
if (event.type == SDL_EVENT_QUIT) {
break;
}
DispatchEvent(event);
delete_later_pool_.Clean();
}
for (const auto& handler : this->quit_handlers_) {
handler();
}
return quit_code_;
}
void SdlUiApplication::RequestQuit(int quit_code) {
quit_code_ = quit_code;
SDL_Event event;
event.type = SDL_EVENT_QUIT;
event.quit.timestamp = SDL_GetTicksNS();
CheckSdlReturn(SDL_PushEvent(&event));
}
void SdlUiApplication::AddOnQuitHandler(std::function<void()> handler) {
this->quit_handlers_.push_back(std::move(handler));
}
bool SdlUiApplication::IsQuitOnAllWindowClosed() {
return is_quit_on_all_window_closed_;
}
void SdlUiApplication::SetQuitOnAllWindowClosed(
bool quit_on_all_window_closed) {
is_quit_on_all_window_closed_ = quit_on_all_window_closed;
}
long long SdlUiApplication::SetImmediate(std::function<void()> action) {
return SetTimeout(std::chrono::milliseconds::zero(), std::move(action));
}
long long SdlUiApplication::SetTimeout(std::chrono::milliseconds milliseconds,
std::function<void()> action) {
return SetTimer(milliseconds, std::move(action), false);
}
long long SdlUiApplication::SetInterval(std::chrono::milliseconds milliseconds,
std::function<void()> action) {
return SetTimer(milliseconds, std::move(action), true);
}
void SdlUiApplication::CancelTimer(long long id) {
return timers_.Remove(static_cast<int>(id));
}
void SdlUiApplication::DeleteLater(Object* object) {
delete_later_pool_.Add(object);
}
std::vector<INativeWindow*> SdlUiApplication::GetAllWindow() {
std::vector<INativeWindow*> windows(windows_.size());
std::ranges::copy(windows_, windows.begin());
return windows;
}
INativeWindow* SdlUiApplication::CreateWindow() { return new SdlWindow(this); }
cru::platform::graphics::IGraphicsFactory*
SdlUiApplication::GetGraphicsFactory() {
return graphics_factory_;
}
ICursorManager* SdlUiApplication::GetCursorManager() { NotImplemented(); }
IClipboard* SdlUiApplication::GetClipboard() { NotImplemented(); }
IMenu* SdlUiApplication::GetApplicationMenu() { return nullptr; }
void SdlUiApplication::RegisterWindow(SdlWindow* window) {
windows_.push_back(window);
}
void SdlUiApplication::UnregisterWindow(SdlWindow* window) {
std::erase(windows_, window);
}
void SdlUiApplication::RunOnMainThread(std::function<void()> action) {
auto p = new std::function<void()>(std::move(action));
SDL_RunOnMainThread(
[](void* userdata) {
auto action = static_cast<std::function<void()>*>(userdata);
(*action)();
delete action;
},
p, false);
}
void SdlUiApplication::PostEmptyEvent() {
SDL_Event event;
SDL_zero(event);
event.type = empty_event_type_;
event.user.timestamp = SDL_GetTicksNS();
SDL_PushEvent(&event);
}
long long SdlUiApplication::SetTimer(std::chrono::milliseconds milliseconds,
std::function<void()> action,
bool repeat) {
PostEmptyEvent();
return timers_.Add(std::move(action), milliseconds, repeat);
}
namespace {
std::optional<SDL_WindowID> GetEventWindowId(const SDL_Event& event) {
switch (event.type) {
case SDL_EVENT_WINDOW_MOVED:
case SDL_EVENT_WINDOW_RESIZED:
case SDL_EVENT_WINDOW_SHOWN:
case SDL_EVENT_WINDOW_HIDDEN:
case SDL_EVENT_WINDOW_MINIMIZED:
case SDL_EVENT_WINDOW_FOCUS_GAINED:
case SDL_EVENT_WINDOW_FOCUS_LOST:
case SDL_EVENT_WINDOW_MOUSE_ENTER:
case SDL_EVENT_WINDOW_MOUSE_LEAVE:
case SDL_EVENT_WINDOW_DESTROYED:
return event.window.windowID;
case SDL_EVENT_MOUSE_BUTTON_DOWN:
case SDL_EVENT_MOUSE_BUTTON_UP:
return event.button.windowID;
case SDL_EVENT_MOUSE_WHEEL:
return event.wheel.windowID;
case SDL_EVENT_KEY_DOWN:
case SDL_EVENT_KEY_UP:
return event.key.windowID;
default:
return std::nullopt;
}
}
} // namespace
bool SdlUiApplication::DispatchEvent(const SDL_Event& event) {
if (auto window_id = GetEventWindowId(event)) {
for (auto window : windows_) {
if (window->sdl_window_id_ == *window_id && window->HandleEvent(&event)) {
return true;
}
}
}
return false;
}
} // namespace cru::platform::gui::sdl
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