增加单实例模式和命令行参数

SpineViewer/App.xaml.cs

@@ -1,10 +1,13 @@
 using NLog;
+using SpineViewer.Natives;
 using SpineViewer.Views;
 using System.Collections.Frozen;
 using System.Configuration;
 using System.Data;
 using System.Diagnostics;
 using System.Globalization;
+using System.IO;
+using System.IO.Pipes;
 using System.Reflection;
 using System.Windows;
 
@@ -15,9 +18,15 @@ namespace SpineViewer
     /// </summary>
     public partial class App : Application
     {
-        public static string Version => Assembly.GetExecutingAssembly().GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion;
+        public static readonly string ExeFilePath = Environment.ProcessPath;
+        public static readonly string ProcessName = Process.GetCurrentProcess().ProcessName;
+        public static readonly string Version = Assembly.GetExecutingAssembly().GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion;
+
+        private const string MutexName = "SpineViewerInstance";
+        private const string PipeName = "SpineViewerPipe";
 
         private static readonly Logger _logger;
+        private static readonly Mutex _instanceMutex;
 
         static App()
         {
@@ -35,6 +44,17 @@ namespace SpineViewer
                 _logger.Error("Unobserved task exception: {0}", e.Exception.Message);
                 e.SetObserved();
             };
+
+            // 单例模式加 IPC 通信
+            _instanceMutex = new Mutex(true, MutexName, out var createdNew);
+            if (!createdNew)
+            {
+                ShowExistedInstance();
+                SendCommandLineArgs();
+                Environment.Exit(0); // 不再启动新实例
+                return;
+            }
+            StartPipeServer();
         }
 
         private static void InitializeLogConfiguration()
@@ -50,7 +70,9 @@ namespace SpineViewer
                 ArchiveNumbering = NLog.Targets.ArchiveNumberingMode.Rolling,
                 ArchiveAboveSize = 1048576,
                 MaxArchiveFiles = 5,
-                Layout = "${date:format=yyyy-MM-dd HH\\:mm\\:ss} - ${level:uppercase=true} - ${callsite-filename:includeSourcePath=false}:${callsite-linenumber} - ${message}"
+                Layout = "${date:format=yyyy-MM-dd HH\\:mm\\:ss} - ${level:uppercase=true} - ${processid} - ${callsite-filename:includeSourcePath=false}:${callsite-linenumber} - ${message}",
+                ConcurrentWrites = true,
+                KeepFileOpen = false,
             };
 
             config.AddTarget(fileTarget);
@@ -58,20 +80,107 @@ namespace SpineViewer
             LogManager.Configuration = config;
         }
 
+        private static void ShowExistedInstance()
+        {
+            try
+            {
+                // 2. 遍历同名进程
+                var processes = Process.GetProcessesByName(ProcessName);
+                foreach (var p in processes)
+                {
+                    // 跳过当前进程
+                    if (p.Id == Process.GetCurrentProcess().Id)
+                        continue;
+
+                    IntPtr hWnd = p.MainWindowHandle;
+                    if (hWnd != IntPtr.Zero)
+                    {
+                        // 3. 显示并置顶窗口
+                        if (User32.IsIconic(hWnd))
+                        {
+                            User32.ShowWindow(hWnd, User32.SW_RESTORE);
+                        }
+                        User32.SetForegroundWindow(hWnd);
+                        break; // 找到一个就可以退出
+                    }
+                }
+            }
+            catch
+            {
+                // 忽略异常，不影响当前进程退出
+            }
+        }
+
+        private static void SendCommandLineArgs()
+        {
+            var args = Environment.GetCommandLineArgs().Skip(1).ToArray();
+            if (args.Length <= 0)
+                return;
+
+            _logger.Info("Send command line args to existed instance, \"{0}\"", string.Join(", ", args));
+            try
+            {
+                // 已有实例在运行，把参数通过命名管道发过去
+                using (var client = new NamedPipeClientStream(".", PipeName, PipeDirection.Out))
+                {
+                    client.Connect(1000); // 等待 1 秒
+                    using (var writer = new StreamWriter(client))
+                    {
+                        foreach (var v in args)
+                        {
+                            writer.WriteLine(v);
+                        }
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.Trace(ex.ToString());
+                _logger.Error("Failed to pass command line args to existed instance, {0}", ex.Message);
+            }
+        }
+
+        private static void StartPipeServer()
+        {
+            var t = new Task(() =>
+            {
+                while (true)
+                {
+                    using (var server = new NamedPipeServerStream(PipeName, PipeDirection.In))
+                    {
+                        server.WaitForConnection();
+                        using (var reader = new StreamReader(server))
+                        {
+                            var args = new List<string>();
+                            string? line;
+                            while ((line = reader.ReadLine()) != null)
+                                args.Add(line);
+
+                            if (args.Count > 0)
+                            {
+                                Current.Dispatcher.Invoke(() =>
+                                {
+                                    if (Current?.MainWindow is MainWindow mainWindow)
+                                        mainWindow.OpenFiles(args);
+                                });
+                            }
+                        }
+                    }
+                }
+            }, default, TaskCreationOptions.LongRunning);
+            t.Start();
+        }
+
         protected override void OnStartup(StartupEventArgs e)
         {
+            // 正式启动窗口
             base.OnStartup(e);
-
-            var dict = new ResourceDictionary();
-
             var uiCulture = CultureInfo.CurrentUICulture.Name.ToLowerInvariant();
             _logger.Info("Current UI Culture: {0}", uiCulture);
 
             if (uiCulture.StartsWith("zh")) { } // 默认就是中文, 无需操作
             else if (uiCulture.StartsWith("ja")) Language = AppLanguage.JA;
             else Language = AppLanguage.EN;
-
-            Resources.MergedDictionaries.Add(dict);
         }
 
         private void App_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)

SpineViewer/Natives/Gdi32.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace SpineViewer.Natives
+{
+    /// <summary>
+    /// gdi32.dll 包装类
+    /// </summary>
+    public static class Gdi32
+    {
+        [DllImport("gdi32.dll", SetLastError = true)]
+        public static extern nint CreateCompatibleDC(nint hdc);
+
+        [DllImport("gdi32.dll", SetLastError = true)]
+        public static extern bool DeleteDC(nint hdc);
+
+        [DllImport("gdi32.dll", SetLastError = true)]
+        public static extern nint SelectObject(nint hdc, nint hgdiobj);
+
+        [DllImport("gdi32.dll", SetLastError = true)]
+        public static extern bool DeleteObject(nint hObject);
+    }
+}

SpineViewer/Natives/Shell32.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace SpineViewer.Natives
+{
+    /// <summary>
+    /// shell32.dll 包装类
+    /// </summary>
+    public static class Shell32
+    {
+        public const uint SHCNE_ASSOCCHANGED = 0x08000000;
+        public const uint SHCNF_IDLIST = 0x0000;
+
+        [DllImport("shell32.dll")]
+        public static extern void SHChangeNotify(uint wEventId, uint uFlags, IntPtr dwItem1, IntPtr dwItem2);
+    }
+}

SpineViewer/Natives/User32.cs

@@ -10,9 +10,9 @@ using System.Windows;
 namespace SpineViewer.Natives
 {
     /// <summary>
-    /// Win32 Sdk 包装类
+    /// user32.dll 包装类
     /// </summary>
-    public static class Win32
+    public static class User32
     {
         public const int GWL_STYLE = -16;
         public const int WS_SIZEBOX = 0x40000;
@@ -178,17 +178,11 @@ namespace SpineViewer.Natives
         [DllImport("user32.dll", SetLastError = true)]
         public static extern bool ShowWindow(nint hWnd, int nCmdShow);
 
-        [DllImport("gdi32.dll", SetLastError = true)]
+        [DllImport("user32.dll")]
-        public static extern nint CreateCompatibleDC(nint hdc);
+        public static extern bool IsIconic(IntPtr hWnd);
 
-        [DllImport("gdi32.dll", SetLastError = true)]
+        [DllImport("user32.dll")]
-        public static extern bool DeleteDC(nint hdc);
+        public static extern bool SetForegroundWindow(IntPtr hWnd);
-
-        [DllImport("gdi32.dll", SetLastError = true)]
-        public static extern nint SelectObject(nint hdc, nint hgdiobj);
-
-        [DllImport("gdi32.dll", SetLastError = true)]
-        public static extern bool DeleteObject(nint hObject);
 
         [DllImport("user32.dll")]
         private static extern IntPtr MonitorFromWindow(IntPtr hwnd, uint dwFlags);

SpineViewer/Views/MainWindow.xaml.cs

@@ -49,6 +49,7 @@ public partial class MainWindow : Window
         _vm.SpineObjectListViewModel.RequestSelectionChanging += SpinesListView_RequestSelectionChanging;
         _vm.SFMLRendererViewModel.RequestSelectionChanging += SpinesListView_RequestSelectionChanging;
         Loaded += MainWindow_Loaded;
+        ContentRendered += MainWindow_ContentRendered;
         Closed += MainWindow_Closed;
     }
 
@@ -75,6 +76,16 @@ public partial class MainWindow : Window
         LoadLastState();
     }
 
+    private void MainWindow_ContentRendered(object? sender, EventArgs e)
+    {
+        string[] args = Environment.GetCommandLineArgs();
+        if (args.Length > 1)
+        {
+            string[] filePaths = args.Skip(1).ToArray();
+            _vm.SpineObjectListViewModel.AddSpineObjectFromFileList(filePaths);
+        }
+    }
+
     private void MainWindow_Closed(object? sender, EventArgs e)
     {
         SaveLastState();
@@ -83,6 +94,14 @@ public partial class MainWindow : Window
         vm.StopRender();
     }
 
+    /// <summary>
+    /// 给管道通信提供的打开文件外部调用方法
+    /// </summary>
+    public void OpenFiles(IEnumerable<string> filePaths)
+    {
+        _vm.SpineObjectListViewModel.AddSpineObjectFromFileList(filePaths);
+    }
+
     /// <summary>
     /// 初始化窗口日志器
     /// </summary>
@@ -193,6 +212,9 @@ public partial class MainWindow : Window
             default:
                 break;
         }
+
+        // 如果选中项发生变化也强制转移焦点
+        _spinesListView.Focus();
     }
 
     private void SpinesListView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
@@ -302,7 +324,7 @@ public partial class MainWindow : Window
         if (_fullScreenLayout.Visibility == Visibility.Visible) return;
 
         IntPtr hwnd = new WindowInteropHelper(this).Handle;
-        if (Win32.GetScreenResolution(hwnd, out var resX, out var resY))
+        if (User32.GetScreenResolution(hwnd, out var resX, out var resY))
         {
             _vm.SFMLRendererViewModel.SetResolution(resX, resY);
         }