Fix windows deep link

windows/flutter/generated_plugin_registrant.cc

@@ -15,7 +15,6 @@
 #include <url_launcher_windows/url_launcher_windows.h>
 #include <vclibs/vclibs_plugin.h>
 #include <window_manager/window_manager_plugin.h>
-#include <windows_single_instance/windows_single_instance_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   ProtocolHandlerPluginRegisterWithRegistrar(
@@ -36,6 +35,4 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("VclibsPlugin"));
   WindowManagerPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("WindowManagerPlugin"));
-  WindowsSingleInstancePluginRegisterWithRegistrar(
-      registry->GetRegistrarForPlugin("WindowsSingleInstancePlugin"));
 }

windows/flutter/generated_plugins.cmake

@@ -12,7 +12,6 @@ list(APPEND FLUTTER_PLUGIN_LIST
   url_launcher_windows
   vclibs
   window_manager
-  windows_single_instance
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

windows/runner/main.cpp

@@ -9,14 +9,24 @@
 
 int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
                       _In_ wchar_t *command_line, _In_ int show_command) {
-  HWND hwnd = ::FindWindow(L"FLUTTER_RUNNER_WIN32_WINDOW", L"Hiddify Next");
-  if (hwnd != NULL) {
-    DispatchToProtocolHandler(hwnd);
+  HANDLE hMutexInstance = CreateMutex(NULL, TRUE, L"HiddifyMutex");
+  HWND handle = FindWindowA(NULL, "Hiddify Next");
 
-    ::ShowWindow(hwnd, SW_NORMAL);
-    ::SetForegroundWindow(hwnd);
-    return EXIT_FAILURE;
+  if (GetLastError() == ERROR_ALREADY_EXISTS) {
+    flutter::DartProject project(L"data");
+    std::vector<std::string> command_line_arguments = GetCommandLineArguments();
+    project.set_dart_entrypoint_arguments(std::move(command_line_arguments));
+    FlutterWindow window(project);
+    if (window.SendAppLinkToInstance(L"Hiddify Next")) {
+      return false;
+    }
+
+    WINDOWPLACEMENT place = {sizeof(WINDOWPLACEMENT)};
+    GetWindowPlacement(handle, &place);
+    ShowWindow(handle, SW_NORMAL);
+    return 0;
   }
+
   // Attach to console when present (e.g., 'flutter run') or create a
   // new console when running with a debugger.
   if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) {
@@ -49,5 +59,6 @@ int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
   }
 
   ::CoUninitialize();
+  ReleaseMutex(hMutexInstance);
   return EXIT_SUCCESS;
 }

windows/runner/win32_window.cpp

@@ -4,6 +4,7 @@
 #include <flutter_windows.h>
 
 #include "resource.h"
+#include <protocol_handler/protocol_handler_plugin.h>
 
 namespace {
 
@@ -123,6 +124,11 @@ Win32Window::~Win32Window() {
 bool Win32Window::Create(const std::wstring& title,
                          const Point& origin,
                          const Size& size) {
+  if (SendAppLinkToInstance(title))
+  {
+    return false;
+  }
+
   Destroy();
 
   const wchar_t* window_class =
@@ -155,6 +161,44 @@ bool Win32Window::Show() {
   return ShowWindow(window_handle_, SW_SHOWNORMAL);
 }
 
+
+bool Win32Window::SendAppLinkToInstance(const std::wstring &title)
+{
+  // Find our exact window
+  HWND hwnd = ::FindWindow(kWindowClassName, title.c_str());
+
+  if (hwnd)
+  {
+    // Dispatch new link to current window
+    DispatchToProtocolHandler(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);
+
+    // Window has been found, don't create another one.
+    return true;
+  }
+
+  return false;
+}
+
 // static
 LRESULT CALLBACK Win32Window::WndProc(HWND const window,
                                       UINT const message,

windows/runner/win32_window.h

@@ -36,6 +36,8 @@ class Win32Window {
   // |Show| is called. Returns true if the window was created successfully.
   bool Create(const std::wstring& title, const Point& origin, const Size& size);
 
+  bool SendAppLinkToInstance(const std::wstring &title);
+
   // Show the current window. Returns true if the window was successfully shown.
   bool Show();