Reboot-Launcher/gui/windows/runner/main.cpp

#include <bitsdojo_window_windows/bitsdojo_window_plugin.h>
auto bdw = bitsdojo_window_configure(BDW_CUSTOM_FRAME | BDW_HIDE_ON_STARTUP);

#include <cstdlib>

#include <flutter/dart_project.h>
#include <flutter/flutter_view_controller.h>
#include "app_links/app_links_plugin_c_api.h"
#include <windows.h>

#include "flutter_window.h"
#include "utils.h"
#include <iostream>
#include <io.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>

bool IsAlreadyOpen(){
    HANDLE hMutex = CreateMutexW(NULL, TRUE, L"RebootLauncherNewMutex");
    if (hMutex == NULL && GetLastError() == ERROR_ALREADY_EXISTS) {
        HWND hwndExisting = FindWindowW(NULL, L"Reboot Launcher");
        if (hwndExisting != NULL) {
            ShowWindow(hwndExisting, SW_RESTORE);
            SetForegroundWindow(hwndExisting);
            CloseHandle(hMutex);
            return true;
        } else {
            ReleaseMutex(hMutex);
            CloseHandle(hMutex);
            return false;
        }
    }

    return false;
}

constexpr const wchar_t kWindowClassName[] = L"FLUTTER_RUNNER_WIN32_WINDOW";

bool SendAppLinkToInstance(const std::wstring& title) {
  // Find our exact window
  HWND hwnd = ::FindWindow(kWindowClassName, title.c_str());

  if (hwnd) {
    // Dispatch new link to current window
    SendAppLink(hwnd);

    // (Optional) Restore our window to front in same state
    WINDOWPLACEMENT place = { sizeof(WINDOWPLACEMENT) };
    GetWindowPlacement(hwnd, &place);

    switch(place.showCmd) {
      case SW_SHOWMAXIMIZED:
          ShowWindow(hwnd, SW_SHOWMAXIMIZED);
          break;
      case SW_SHOWMINIMIZED:
          ShowWindow(hwnd, SW_RESTORE);
          break;
      default:
          ShowWindow(hwnd, SW_NORMAL);
          break;
    }

    SetWindowPos(0, HWND_TOP, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE);
    SetForegroundWindow(hwnd);
    // END Restore

    // Window has been found, don't create another one.
    return true;
  }

  return false;
}

int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
                      _In_ wchar_t *command_line, _In_ int show_command) {
  if(SendAppLinkToInstance(L"Reboot Launcher")) {
    return EXIT_SUCCESS;
  }

  if(IsAlreadyOpen()) {
    return EXIT_SUCCESS;
  }

  // Attach to console when present (e.g., 'flutter run') or create a
  // new console when running with a debugger.
  std::vector<std::string> command_line_arguments = GetCommandLineArguments();
  if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) {
    CreateAndAttachConsole();
  }

  // Initialize COM, so that it is available for use in the library and/or
  // plugins.
  ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);

  flutter::DartProject project(L"data");
  project.set_dart_entrypoint_arguments(std::move(command_line_arguments));

  FlutterWindow window(project);
  Win32Window::Point origin(10, 10);
  Win32Window::Size size(1280, 720);
  if (!window.CreateAndShow(L"Reboot Launcher", origin, size)) {
    return EXIT_FAILURE;
  }

  window.SetQuitOnClose(true);

  ::MSG msg;
  while (::GetMessage(&msg, nullptr, 0, 0)) {
    ::TranslateMessage(&msg);
    ::DispatchMessage(&msg);
  }

  ::CoUninitialize();
  return EXIT_SUCCESS;
}