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#include "cru/win/gui/GodWindow.hpp"
#include "cru/common/Logger.hpp"
#include "cru/win/gui/Exception.hpp"
#include "cru/win/gui/UiApplication.hpp"
#include "cru/win/gui/WindowClass.hpp"
namespace cru::platform::gui::win {
constexpr auto god_window_class_name = L"GodWindowClass";
LRESULT CALLBACK GodWndProc(HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam) {
const auto app = WinUiApplication::GetInstance();
if (app) {
LRESULT result;
auto god_window = app->GetGodWindow();
if (god_window != nullptr) {
const auto handled = god_window->HandleGodWindowMessage(
hWnd, uMsg, wParam, lParam, &result);
if (handled) return result;
}
}
return DefWindowProcW(hWnd, uMsg, wParam, lParam);
}
GodWindow::GodWindow(WinUiApplication* application) {
application_ = application;
const auto h_instance = application->GetInstanceHandle();
god_window_class_ = std::make_unique<WindowClass>(god_window_class_name,
GodWndProc, h_instance);
hwnd_ = CreateWindowEx(0, god_window_class_name, L"", 0, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
HWND_MESSAGE, nullptr, h_instance, nullptr);
if (hwnd_ == nullptr)
throw Win32Error(::GetLastError(), "Failed to create god window.");
}
GodWindow::~GodWindow() {
if (!::DestroyWindow(hwnd_)) {
// Although this could be "safely" ignore.
log::TagWarn(log_tag, u"Failed to destroy god window.");
}
}
bool GodWindow::HandleGodWindowMessage(HWND hwnd, UINT msg, WPARAM w_param,
LPARAM l_param, LRESULT* result) {
WindowNativeMessageEventArgs args(
WindowNativeMessage{hwnd, msg, w_param, l_param});
message_event_.Raise(args);
if (args.IsHandled()) {
*result = args.GetResult();
return true;
}
return false;
}
} // namespace cru::platform::gui::win
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