#403, fix crash due to empty history record

Help.md

@@ -24,8 +24,9 @@
   | -fix_offscreen_window=0 | Turn off auto correction of off-screen windows
   | -fix_unminimized_window=0 | Turn off auto restore of unminimized windows. Use this switch to avoid undesirable window shifting during window activation, which comes with Event id 9999 : "restore minimized window ...." in event viewer.
   |-auto_restore_new_display_session_from_db=0| Disable window restore from DB upon PC startup or switching display for the first time
-  |-auto_restore_existing_window_to_last_capture=0 | Turn off auto restore upon PW start
+  |-auto_restore_existing_window_to_last_capture=1 | Turn on auto restore existing window from last capture upon PW start
   |-auto_restore_new_window_to_last_capture=0 | Turn off auto restore new window to last killed position
+  |-pos_match_threshold 80 | Auto correct new window position to last killed position within range of 80 pixels, default is 40
   | ‑auto_restore_missing_windows=1 | When restoring from disk, restore missing windows without prompting the user
   | ‑auto_restore_missing_windows=2 | At startup, automatically restore missing windows from disk. The user will be prompted before restoring each missing window
   | ‑auto_restore_missing_windows=3 | At startup, automatically restore missing windows from disk without prompting the user
@@ -59,7 +60,6 @@
 
   * Dual Position Switching functionality:
     * Click the desktop window to bring the foreground window to its previous background position and Z-order.
-    * Shift + Click the desktop window to bring the foreground window to its *second* last background position. This is useful if the previous background position is mis-captured due to invoking start menu or other popups.
     * Ctrl + Click the desktop window to bring the foreground window to its previous Z-order while keeping the current location and size.
 
   * To cancel Dual Position Switching:

Ninjacrab.PersistentWindows.Solution/Common/HotKeyWindow.cs

@@ -37,6 +37,7 @@ namespace PersistentWindows.Common
         private static POINT lastCursorPos;
         private POINT lastWheelCursorPos;
         private bool handCursor = false;
+        private bool ibeamCursor = false;
         private int titleHeight;
         private Color dfltBackColor;
         private bool promptZkey = true;
@@ -869,6 +870,7 @@ namespace PersistentWindows.Common
                 }
                 else if (Math.Abs(cursorPos.X - lastCursorPos.X) > 3 || Math.Abs(cursorPos.Y - lastCursorPos.Y) > 3)
                 {
+                    ibeamCursor = false;
                     //mouse moving, continue monitor
                     totalWaitSecondsForWhiteColor = 0;
                 }
@@ -906,12 +908,14 @@ namespace PersistentWindows.Common
                     }
                     else if (hCursor == Cursors.IBeam.Handle)
                     {
+                        ibeamCursor = true;
                         Visible = false;
                         StartAliveTimer(11, 1000);
                         return;
                     }
                     else if (hCursor == Cursors.Cross.Handle || handCursor)
                     {
+                        ibeamCursor = false;
                         StartAliveTimer(7);
                         return;
                     }
@@ -946,6 +950,14 @@ namespace PersistentWindows.Common
                         regain_focus = false;
                     }
 
+                    if (ibeamCursor && hCursor == Cursors.Default.Handle)
+                        //&& Math.Abs(cursorPos.X - lastCursorPos.X) < 3 && Math.Abs(cursorPos.Y - lastCursorPos.Y) < 3)
+                    {
+                        ibeamCursor = false;
+                        StartAliveTimer(11, 1000);
+                        return;
+                    }
+
                     // let tiny hotkey window follow cursor position
                     ResetHotKeyVirtualDesktop();
                     ResetHotkeyWindowPos();
@@ -968,6 +980,7 @@ namespace PersistentWindows.Common
                     // hand cursor shape
                     if (!handCursor)
                     {
+                        ibeamCursor = false;
                         handCursor = true;
                         Left -= 10;
                     }

Ninjacrab.PersistentWindows.Solution/Common/Models/ApplicationDisplayMetrics.cs

@@ -26,6 +26,8 @@ namespace PersistentWindows.Common.Models
         public bool IsFullScreen { get; set; }
         public bool IsMinimized { get; set; }
         public bool IsInvisible { get; set; }
+        public long Style { get; set; }
+        public long ExtStyle { get; set; }
 
         // for restore window position to display session end time
         public DateTime CaptureTime { get; set; }

Ninjacrab.PersistentWindows.Solution/Common/PersistentWindowProcessor.cs

@@ -34,7 +34,7 @@ namespace PersistentWindows.Common
         public int UserForcedRestoreLatency = 0;
         private const int CaptureLatency = 3000; // delay in milliseconds from window OS move to capture
         private const int UserMoveLatency = 1000; // delay in milliseconds from user move/minimize/unminimize/maximize to capture, must < CaptureLatency
-        private const int ForegroundTimerLatency = UserMoveLatency / 5;
+        private const int ForegroundTimerLatency = UserMoveLatency / 4;
         private const int MaxUserMoves = 4; // max user window moves per capture cycle
         private const int MinWindowOsMoveEvents = 12; // threshold of window move events initiated by OS per capture cycle
         private const int MaxSnapshots = 38; // 0-9, a-z, ` (for redo last auto restore) and final one for undo last snapshot restore
@@ -42,6 +42,8 @@ namespace PersistentWindows.Common
         private const int MaxHistoryQueueLength = 41; // ideally bigger than MaxSnapshots + 2
 
         private const int PauseRestoreTaskbar = 3500; //cursor idle time before dragging taskbar
+        private const int MinClassNamePrefix = 8; //allow partial class name matching during inheritance
+        public int MaxDiffPos = 40; //allow matching window of slightly different position
 
         private bool initialized = false;
 
@@ -104,10 +106,11 @@ namespace PersistentWindows.Common
         private Timer restoreTimer;
         private Timer restoreFinishedTimer;
         public bool restoringFromMem = false; // automatic restore from memory or snapshot
+        private bool restoreSingleWindow = false;
         public bool restoringFromDB = false; // manual restore from DB
         public bool autoInitialRestoreFromDB = false;
         public bool restoringSnapshot = false; // implies restoringFromMem
-        private bool restoringFullScreenWindow = false;
+        private Object restoringFullScreenWindow = new object();
         public bool showDesktop = false; // show desktop when display changes
         public int fixZorder = 1; // 1 means restore z-order only for snapshot; 2 means restore z-order for all; 0 means no z-order restore at all
         public int fixZorderMethod = 5; // bit i represent restore method for pass i
@@ -158,7 +161,7 @@ namespace PersistentWindows.Common
 
         private static Dictionary<IntPtr, string> windowProcessName = new Dictionary<IntPtr, string>();
         private Process process;
-        private ProcessPriorityClass processPriority;
+        public ProcessPriorityClass processPriority;
 
         private string appDataFolder;
         public bool redirectAppDataFolder = false;
@@ -480,6 +483,10 @@ namespace PersistentWindows.Common
             }
             else if (fullScreenGamingWindow == IntPtr.Zero)
             {
+                //create window event may be delayed
+                if (hwnd != IntPtr.Zero && !noRestoreWindows.Contains(hwnd))
+                    CaptureWindow(hwnd, 0, DateTime.Now, curDisplayKey);
+
                 StartCaptureTimer();
 
                 //speed up initial capture
@@ -515,12 +522,12 @@ namespace PersistentWindows.Common
                 if (!ctrl_key_pressed && !alt_key_pressed)
                 {
                     //restore window to previous background position
-                    SwitchForeBackground(hwnd, secondBackGround:shift_key_pressed);
+                    SwitchForeBackground(hwnd);
                 }
                 else if (ctrl_key_pressed && !alt_key_pressed)
                 {
                     //restore to previous background zorder with current size/pos
-                    SwitchForeBackground(hwnd, strict_dps_check: false, updateBackgroundPos: true, secondBackGround:shift_key_pressed);
+                    SwitchForeBackground(hwnd, strict_dps_check: false, updateBackgroundPos: true);
                 }
                 else if (!ctrl_key_pressed && alt_key_pressed && !shift_key_pressed)
                 {
@@ -591,8 +598,6 @@ namespace PersistentWindows.Common
         public bool Start(bool auto_restore_from_db, bool auto_restore_last_capture_at_startup)
         {
             process = Process.GetCurrentProcess();
-            processPriority = process.PriorityClass;
-
             string productName = System.Windows.Forms.Application.ProductName;
             appDataFolder = redirectAppDataFolder ? "." :
                 Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), productName);
@@ -766,8 +771,6 @@ namespace PersistentWindows.Common
                     Log.Event("Restore finished in pass {0} with {1} windows recovered for display setting {2}", restorePass, numWindowRestored, curDisplayKey);
                     sessionActive = true;
 
-                    WriteDataDump();
-
                     if (!wasRestoringSnapshot && !wasRestoringFromDB)
                     {
                         if (!snapshotTakenTime.ContainsKey(curDisplayKey))
@@ -862,6 +865,7 @@ namespace PersistentWindows.Common
                 (s, e) =>
                 {
                     process.PriorityClass = ProcessPriorityClass.High;
+                    EndDisplaySession();
                     WriteDataDump();
                     Log.Event("Session ending");
                 };
@@ -870,6 +874,9 @@ namespace PersistentWindows.Common
             this.displaySettingsChangingHandler =
                 (s, e) =>
                 {
+                    if (fastRestore)
+                        process.PriorityClass = ProcessPriorityClass.High;
+
                     if (!freezeCapture)
                     {
                         lastDisplayChangeTime = DateTime.Now;
@@ -892,9 +899,6 @@ namespace PersistentWindows.Common
             this.displaySettingsChangedHandler =
                 (s, e) =>
                 {
-                    if (fastRestore)
-                        process.PriorityClass = ProcessPriorityClass.High;
-
                     string displayKey = GetDisplayKey();
                     Log.Event("Display settings changed {0}", displayKey);
 
@@ -1068,6 +1072,10 @@ namespace PersistentWindows.Common
                     normalSessions.Add(item);
                 }
 
+                var ticks = Kernel32.GetTickCount64();
+                if (ticks > 300000) //system up 5min
+                    return true;
+
                 if (db_exist && auto_restore_from_db)
                 {
                     restoringFromDB = true;
@@ -1396,7 +1404,17 @@ namespace PersistentWindows.Common
                     if (!monitorApplications.ContainsKey(display_key))
                         monitorApplications[display_key] = new Dictionary<IntPtr, List<ApplicationDisplayMetrics>>();
 
+                    List<ApplicationDisplayMetrics> app_list = null;
+                    if (monitorApplications[display_key].ContainsKey(hwnd))
+                    {
+                        app_list = monitorApplications[display_key][hwnd];
+                        monitorApplications[display_key].Remove(hwnd);
+                    }
                     monitorApplications[display_key][hwnd] = deadApps[display_key][kid];
+                    if (app_list != null)
+                    {
+                        monitorApplications[display_key][hwnd].AddRange(app_list);
+                    }
                     deadApps[display_key].Remove(kid);
 
                     //replace prev zorder reference of dead_hwnd with hwnd in monitorApplication
@@ -1427,6 +1445,18 @@ namespace PersistentWindows.Common
             return r;
         }
 
+        int LenCommonPrefix(string a, string b)
+        {
+            int len = Math.Min(a.Length, b.Length);
+            int r;
+            for (r = 0; r < len; ++r)
+            {
+                if (a[r] != b[r])
+                    break;
+            }
+            return r;
+        }
+
         private IntPtr FindMatchingKilledWindow(IntPtr hwnd)
         {
             if (!deadApps.ContainsKey(curDisplayKey))
@@ -1458,22 +1488,41 @@ namespace PersistentWindows.Common
 
             if (!string.IsNullOrEmpty(className))
             {
-                IntPtr dflt_kid = IntPtr.Zero;
-                int title_match_cnt = 0;
-                IntPtr title_match_hid = IntPtr.Zero;
+                int pos_match_cnt = 0;
                 IntPtr pos_match_hid = IntPtr.Zero;
+                int similar_pos_cnt = 0;
+                int diff_size = int.MaxValue;
+                IntPtr similar_pos_hid = IntPtr.Zero;
+                DateTime last_killed_time = new DateTime(0);
+                IntPtr last_killed_hid = IntPtr.Zero;
+
+                long style = User32.GetWindowLong(hwnd, User32.GWL_STYLE);
+                long ext_style = User32.GetWindowLong(hwnd, User32.GWL_EXSTYLE);
 
                 var deadAppPos = deadApps[curDisplayKey];
                 lock(captureLock)
                 foreach (var kid in deadAppPos.Keys)
                 {
-                    var appPos = deadAppPos[kid].Last<ApplicationDisplayMetrics>();
-
-                    if (!className.Equals(appPos.ClassName))
+                    var appPos = deadAppPos[kid].LastOrDefault<ApplicationDisplayMetrics>();
+                    if (appPos == null)
                         continue;
+
                     if (!procName.Equals(appPos.ProcessName))
                         continue;
 
+                    if (appPos.Style != 0 && style != appPos.Style)
+                        continue;
+                    if (appPos.ExtStyle != 0 && ext_style != appPos.ExtStyle)
+                        continue;
+
+                    if (!className.Equals(appPos.ClassName))
+                    {
+                        if (className.Length != appPos.ClassName.Length)
+                            continue;
+                        if (LenCommonPrefix(className, appPos.ClassName) < MinClassNamePrefix)
+                            continue;
+                    }
+
                     if (IsMinimized(hwnd) != appPos.IsMinimized)
                         continue;
                     if (User32.IsWindowVisible(hwnd) == appPos.IsInvisible)
@@ -1486,26 +1535,76 @@ namespace PersistentWindows.Common
                     if (rect.Equals(r) && title.Equals(appPos.Title))
                         return kid;
 
-                    if (title.Equals(appPos.Title))
+                    if (rect.Equals(r))
                     {
-                        if (title_match_cnt == 0)
-                            title_match_hid = kid;
-                        ++title_match_cnt;
-                    }
-                    else if (rect.Equals(r))
+                        pos_match_cnt++;
                         pos_match_hid = kid;
-                    else if (dflt_kid == IntPtr.Zero)
-                        dflt_kid = kid;
                     }
 
-                if (title_match_cnt == 1)
-                    return title_match_hid;
+                    if (r.Diff(rect) < diff_size)
+                    {
+                        diff_size = r.Diff(rect);
+                        similar_pos_cnt++;
+                        similar_pos_hid = kid;
+                    }
 
-                if (pos_match_hid != IntPtr.Zero)
+                    if (appPos.CaptureTime > last_killed_time)
+                    {
+                        last_killed_time = appPos.CaptureTime;
+                        last_killed_hid = kid;
+                    }
+                }
+
+                if (pos_match_cnt == 1)
                     return pos_match_hid;
 
-                if (dflt_kid != IntPtr.Zero)
-                    return dflt_kid;
+                if (diff_size <= MaxDiffPos)
+                {
+                    Log.Event($"matching window with position diff of {diff_size}");
+                    return similar_pos_hid;
+                }
+
+                if (!monitorApplications.ContainsKey(curDisplayKey))
+                    return IntPtr.Zero;
+
+                int proc_name_match_cnt = 0;
+                int class_name_match_cnt = 0;
+                int class_name_mismatch_cnt = 0;
+                foreach(var h in monitorApplications[curDisplayKey].Keys)
+                {
+                    foreach (var dm in monitorApplications[curDisplayKey][h])
+                    {
+                        if (IsMinimized(hwnd) != dm.IsMinimized)
+                            continue;
+                        if (User32.IsWindowVisible(hwnd) == dm.IsInvisible)
+                            continue;
+
+                        if (dm.ProcessName == procName)
+                        {
+                            proc_name_match_cnt++;
+                            if (dm.ClassName == className)
+                                class_name_match_cnt++;
+                            else
+                                class_name_mismatch_cnt++;
+                        }
+                        break;
+                    }
+                }
+
+                //force match last killed pos if hwnd is the first live window of the app
+                if (proc_name_match_cnt == 0)
+                    return last_killed_hid;
+
+                //force match most closest pos if hwnd is the first sub window of the app
+                if (proc_name_match_cnt == 1 && class_name_match_cnt == 0)
+                    return similar_pos_hid;
+
+                //force match if hwnd-like window has multiple instantiations but has only one top-level matching candidate
+                if (similar_pos_cnt == 1 && class_name_match_cnt > 0)
+                    return similar_pos_hid;
+
+                if (class_name_match_cnt > 0 && class_name_mismatch_cnt == 0)
+                    return last_killed_hid;
             }
 
             return IntPtr.Zero;
@@ -1686,6 +1785,7 @@ namespace PersistentWindows.Common
 
                         //restore fullscreen window only applies if screen resolution has changed since minimize/normalize
                         if (prevDisplayMetrics.CaptureTime < lastDisplayChangeTime)
+                            lock(restoringFullScreenWindow)
                             RestoreFullScreenWindow(hwnd, target_rect);
                         return;
                     }
@@ -1832,6 +1932,13 @@ namespace PersistentWindows.Common
             if (!initialized)
                 return;
 
+            if (hwnd == IntPtr.Zero)
+                return;
+
+            if (idObject != 0)
+                // ignore non-window object (caret etc)
+                return;
+
             {
                 switch (eventType)
                 {
@@ -1853,12 +1960,6 @@ namespace PersistentWindows.Common
 
             if (eventType == User32Events.EVENT_OBJECT_DESTROY)
             {
-                if (idObject != 0)
-                {
-                    // ignore non-window object (caret etc)
-                    return;
-                }
-
                 noRestoreWindows.Remove(hwnd);
                 debugWindows.Remove(hwnd);
                 if (fullScreenGamingWindows.Contains(hwnd))
@@ -1888,7 +1989,9 @@ namespace PersistentWindows.Common
                         }
 
                         // for matching new window with killed one
-                        monitorApplications[display_config][hwnd].Last().ProcessName = windowProcessName[hwnd];
+                        var dm = monitorApplications[display_config][hwnd].Last();
+                        if (dm.SnapShotFlags == 0)
+                            dm.CaptureTime = DateTime.Now; //for inheritence in LIFO stile
 
                         deadApps[display_config][hwnd] = monitorApplications[display_config][hwnd];
 
@@ -1944,6 +2047,9 @@ namespace PersistentWindows.Common
                 return;
             }
 
+            if (!CaptureProcessName(hwnd))
+                return;
+
             if (ignoreProcess.Count > 0)
             {
                 string processName = windowProcessName[hwnd];
@@ -1951,9 +2057,6 @@ namespace PersistentWindows.Common
                     return;
             }
 
-            if (!CaptureProcessName(hwnd))
-                return;
-
 #if DEBUG
             if (title.Contains("Microsoft Visual Studio")
                 && (eventType == User32Events.EVENT_OBJECT_LOCATIONCHANGE
@@ -2015,7 +2118,7 @@ namespace PersistentWindows.Common
 
                     if (eventType == User32Events.EVENT_OBJECT_LOCATIONCHANGE)
                     {
-                        if ((remoteSession || restoreTimes >= MinRestoreTimes) && !restoringSnapshot)
+                        if (((remoteSession && !restoreSingleWindow) || restoreTimes >= MinRestoreTimes) && !restoringSnapshot)
                         {
                             // restore is not finished as long as window location keeps changing
                             CancelRestoreFinishedTimer();
@@ -2029,22 +2132,14 @@ namespace PersistentWindows.Common
                     {
                         case User32Events.EVENT_OBJECT_CREATE:
                             {
-                                if (idObject != 0)
-                                    // ignore non-window object (caret etc)
-                                    return;
-
                                 if (restoringFromDB)
                                     return;
 
                                 if (freezeCapture || !monitorApplications.ContainsKey(curDisplayKey))
                                     return;
 
-                                //try to inherit from killed window database
-                                if (FindMatchingKilledWindow(hwnd) != IntPtr.Zero)
-                                {
                                 userMove = true;
-                                    StartCaptureTimer(UserMoveLatency / 2);
-                                }
+                                StartCaptureTimer(UserMoveLatency / 4);
                             }
                             break;
 
@@ -2099,6 +2194,9 @@ namespace PersistentWindows.Common
                                     if (fullScreenGamingWindow != IntPtr.Zero)
                                         return;
 
+                                    if (User32.IsZoomed(hwnd))
+                                        userMove = true;
+
                                     if (foreGroundWindow == hwnd)
                                     {
                                         StartCaptureTimer(UserMoveLatency);
@@ -2113,6 +2211,12 @@ namespace PersistentWindows.Common
                             break;
 
                         case User32Events.EVENT_SYSTEM_MOVESIZESTART:
+                            if (freezeCapture)
+                            {
+                                Log.Event($"recognize {curDisplayKey} as user session");
+                                freezeCapture = false; //unlock unknown display session as normal
+                            }
+
                             if ((User32.GetKeyState(0x11) & 0x8000) != 0 //ctrl key pressed
                                 && (User32.GetKeyState(0x10) & 0x8000) != 0) //shift key pressed
                             {
@@ -2126,6 +2230,12 @@ namespace PersistentWindows.Common
                             lastUnminimizeWindow = hwnd;
                             tidyTabWindows.Remove(hwnd); //no longer hidden by tidytab
 
+                            if (freezeCapture)
+                            {
+                                Log.Event($"recognize {curDisplayKey} as user session");
+                                freezeCapture = false; //unlock unknown display session as normal
+                            }
+
                             if (monitorApplications.ContainsKey(curDisplayKey) && monitorApplications[curDisplayKey].ContainsKey(hwnd))
                             {
                                 //treat unminimized window as foreground
@@ -2154,6 +2264,14 @@ namespace PersistentWindows.Common
                             if (enableMinimizeToTray)
                                 MinimizeToTray.Create(hwnd);
 
+                            /*
+                            if (freezeCapture)
+                            {
+                                Log.Event($"recognize {curDisplayKey} as user session");
+                                freezeCapture = false; //unlock unknown display session as normal
+                            }
+                            */
+
                             goto case User32Events.EVENT_SYSTEM_MOVESIZEEND;
                         case User32Events.EVENT_SYSTEM_MOVESIZEEND:
                             if (eventType == User32Events.EVENT_SYSTEM_MOVESIZEEND)
@@ -2187,15 +2305,37 @@ namespace PersistentWindows.Common
 
         private void TrimQueue(string displayKey, IntPtr hwnd)
         {
+            if (monitorApplications[displayKey][hwnd].Count > MaxHistoryQueueLength)
+            {
+                // limit length of snapshot capture history
+                ulong acc_flags = 0;
+                for (int i = monitorApplications[displayKey][hwnd].Count - 1; i >= 0; --i)
+                {
+                    ulong snapshot_flags = monitorApplications[displayKey][hwnd][i].SnapShotFlags;
+                    if (snapshot_flags != 0)
+                    {
+                        if ((snapshot_flags | acc_flags) == acc_flags)
+                        {
+                            Log.Event($"trim redundant snapshot record for {windowTitle[hwnd]}");
+                            monitorApplications[displayKey][hwnd].RemoveAt(i);
+                        }
+                        acc_flags |= snapshot_flags;
+                    }
+                }
+            }
+
             while (monitorApplications[displayKey][hwnd].Count > MaxHistoryQueueLength)
             {
-                // limit length of capture history
+                // limit length of non-snapshot capture history
                 for (int i = 0; i < monitorApplications[displayKey][hwnd].Count; ++i)
                 {
-                    if (monitorApplications[displayKey][hwnd][i].SnapShotFlags != 0)
-                        continue; //preserve snapshot record
+                    ulong snapshot_flags = monitorApplications[displayKey][hwnd][i].SnapShotFlags;
+                    if (snapshot_flags != 0)
+                        continue;
+
+                    Log.Trace($"trim regular record for {windowTitle[hwnd]}");
                     monitorApplications[displayKey][hwnd].RemoveAt(i);
-                    break; //remove one record at one time
+                    break; //remove one record in each iteration
                 }
             }
         }
@@ -2475,7 +2615,7 @@ namespace PersistentWindows.Common
             Log.Event("Bring foreground window {0} to bottom", GetWindowTitle(hwnd));
         }
 
-        public void SwitchForeBackground(IntPtr hwnd, bool strict_dps_check = true, bool toForeground=false, bool updateBackgroundPos=false, bool secondBackGround = false)
+        public void SwitchForeBackground(IntPtr hwnd, bool strict_dps_check = true, bool toForeground=false, bool updateBackgroundPos=false)
         {
             if (hwnd == IntPtr.Zero || IsTaskBar(hwnd))
                 return;
@@ -2500,8 +2640,6 @@ namespace PersistentWindows.Common
             if (toForeground && IsTaskBar(front_hwnd))
                 return; //already foreground
 
-            IntPtr firstBackgroundWindow = IntPtr.Zero;
-
             for (; prevIndex >= 0; --prevIndex)
             {
                 var metrics = monitorApplications[curDisplayKey][hwnd][prevIndex];
@@ -2510,8 +2648,16 @@ namespace PersistentWindows.Common
                     continue;
                 }
 
+                if (!toForeground)
+                {
+                    RECT screenPosition = new RECT();
+                    User32.GetWindowRect(hwnd, ref screenPosition);
+                    if (screenPosition.Equals(metrics.ScreenPosition))
+                        continue;
+                }
+
                 IntPtr prevZwnd = metrics.PrevZorderWindow;
-                if (prevZwnd != front_hwnd && (prevZwnd == IntPtr.Zero || prevZwnd != firstBackgroundWindow))
+                if (prevZwnd != front_hwnd)
                 {
                     if (toForeground)
                     {
@@ -2520,12 +2666,6 @@ namespace PersistentWindows.Common
                     }
                     else
                     {
-                        if (secondBackGround)
-                        {
-                            firstBackgroundWindow = prevZwnd;
-                            secondBackGround = false;
-                            continue;
-                        }
                         if (IsTaskBar(front_hwnd) && IsTaskBar(prevZwnd))
                             return; //#266, ignore taskbar (as prev-zwindow) change due to window maximize
 
@@ -2601,28 +2741,20 @@ namespace PersistentWindows.Common
             ApplicationDisplayMetrics prevDisplayMetrics;
             if (IsWindowMoved(displayKey, hWnd, eventType, now, out curDisplayMetrics, out prevDisplayMetrics))
             {
-                if (debugWindows.Contains(hWnd))
-                {
-                    string log = string.Format("Captured {0,-8} at {1} '{2}' fullscreen:{3} minimized:{4}",
-                        curDisplayMetrics,
-                        curDisplayMetrics.ScreenPosition.ToString(),
-                        curDisplayMetrics.Title,
-                        curDisplayMetrics.IsFullScreen,
-                        curDisplayMetrics.IsMinimized
-                        );
-                    Log.Event(log);
-
-                    string log2 = string.Format("    WindowPlacement.NormalPosition at {0}",
-                        curDisplayMetrics.WindowPlacement.NormalPosition.ToString());
-                    Log.Event(log2);
-                }
-
                 bool new_window = !monitorApplications[displayKey].ContainsKey(hWnd);
                 if (eventType != 0 || new_window)
                     curDisplayMetrics.IsValid = true;
 
                 if (new_window)
                 {
+                    //if (windowProcessName[hWnd] == "mstsc" && curDisplayMetrics.IsMinimized && curDisplayMetrics.IsInvisible && !curDisplayMetrics.IsFullScreen)
+                    if (curDisplayMetrics.IsMinimized && curDisplayMetrics.IsInvisible && !curDisplayMetrics.IsFullScreen)
+                        return false; //postpone capture till window is visible
+
+                    IntPtr kid = FindMatchingKilledWindow(hWnd);
+                    TryInheritWindow(hWnd, curDisplayMetrics.HWnd, kid, curDisplayMetrics);
+
+                    if (kid == IntPtr.Zero)
                         monitorApplications[displayKey].Add(hWnd, new List<ApplicationDisplayMetrics>());
                 }
                 else
@@ -2630,6 +2762,24 @@ namespace PersistentWindows.Common
                     TrimQueue(displayKey, hWnd);
                 }
 
+                if (debugWindows.Contains(hWnd))
+                {
+                    string log = string.Format("Captured {0} '{1}' fullscreen:{2} minimized:{3} visible:{4} at {5} {6, -8}",
+                        curDisplayMetrics.HWnd.ToString("X"),
+                        curDisplayMetrics.Title,
+                        curDisplayMetrics.IsFullScreen,
+                        curDisplayMetrics.IsMinimized,
+                        !curDisplayMetrics.IsInvisible,
+                        curDisplayMetrics.ScreenPosition.ToString(),
+                        curDisplayMetrics
+                        );
+                    Log.Event(log);
+
+                    string log2 = string.Format("    WindowPlacement.NormalPosition at {0}",
+                        curDisplayMetrics.WindowPlacement.NormalPosition.ToString());
+                    Log.Event(log2);
+                }
+
                 monitorApplications[displayKey][hWnd].Add(curDisplayMetrics);
                 ret = true;
             }
@@ -3044,6 +3194,46 @@ namespace PersistentWindows.Common
             return true;
         }
 
+        private bool TryInheritWindow(IntPtr hwnd, IntPtr realHwnd, IntPtr kid, ApplicationDisplayMetrics curDisplayMetrics)
+        {
+            if (kid == IntPtr.Zero)
+            {
+                ResolveWindowHandleCollision(hwnd);
+            }
+            else
+            {
+                var prevDisplayMetrics = InheritKilledWindow(hwnd, realHwnd, kid);
+                if (hwnd != kid)
+                {
+                    if (prevDisplayMetrics.Title != curDisplayMetrics.Title)
+                        Log.Error($"{hwnd.ToString("X")} Inherit position data from killed window {prevDisplayMetrics.Title} with different title {curDisplayMetrics.Title} {prevDisplayMetrics.HWnd.ToString("X")}");
+                    else
+                        Log.Error($"{hwnd.ToString("X")} Inherit position data from killed window {prevDisplayMetrics.Title} {prevDisplayMetrics.HWnd.ToString("X")}");
+                    ResolveWindowHandleCollision(hwnd);
+                }
+                else
+                    Log.Error($"{hwnd.ToString("X")} Inherit position data from existing window 0x{kid.ToString("X")} for {curDisplayMetrics.Title}");
+
+                if (initialized && autoRestoreNewWindowToLastCapture)
+                {
+                    if (!restoringFromDB && IsResizableWindow(hwnd))
+                    {
+                        Log.Trace($"restore {windowTitle[hwnd]} to last captured position");
+                        restoreSingleWindow = true;
+                        restoringFromMem = true;
+                        RestoreApplicationsOnCurrentDisplays(curDisplayKey, hwnd, prevDisplayMetrics.CaptureTime);
+                        restoreSingleWindow = false;
+                        restoringFromMem = false;
+                        userMove = true;
+                        StartCaptureTimer(UserMoveLatency / 2);
+                    }
+                }
+                return true;
+            }
+
+            return false;
+
+        }
         private bool IsWindowMoved(string displayKey, IntPtr hwnd, User32Events eventType, DateTime time,
             out ApplicationDisplayMetrics curDisplayMetrics, out ApplicationDisplayMetrics prevDisplayMetrics)
         {
@@ -3123,6 +3313,9 @@ namespace PersistentWindows.Common
                 NeedUpdateWindowPlacement = false,
                 ScreenPosition = screenPosition,
 
+                Style = User32.GetWindowLong(hwnd, User32.GWL_STYLE),
+                ExtStyle = User32.GetWindowLong(hwnd, User32.GWL_EXSTYLE),
+
                 IsTopMost = IsWindowTopMost(hwnd),
                 NeedClearTopMost = false,
 
@@ -3139,27 +3332,6 @@ namespace PersistentWindows.Common
                 if (noRestoreWindows.Contains(hwnd))
                     return false;
 
-                IntPtr kid = FindMatchingKilledWindow(hwnd);
-                bool restore_last = false;
-                if (kid == IntPtr.Zero)
-                {
-                    ResolveWindowHandleCollision(hwnd);
-                }
-                else
-                {
-                    prevDisplayMetrics = InheritKilledWindow(hwnd, realHwnd, kid);
-                    if (hwnd != kid)
-                    {
-                        Log.Error($"Inherit position data from killed window 0x{kid.ToString("X")} for {curDisplayMetrics.Title}");
-                        ResolveWindowHandleCollision(hwnd);
-                    }
-                    else
-                        Log.Error($"Inherit position data from existing window 0x{kid.ToString("X")} for {curDisplayMetrics.Title}");
-
-                    if (initialized && autoRestoreNewWindowToLastCapture)
-                        restore_last = true;
-                }
-
                 //newly created window or new display setting
                 curDisplayMetrics.WindowId = (uint)realHwnd;
 
@@ -3181,18 +3353,7 @@ namespace PersistentWindows.Common
                 if (curDisplayMetrics.IsMinimized && prevDisplayMetrics != null && prevDisplayMetrics.IsMinimized)
                     moved = false;
                 else
-                {
                     moved = true;
-
-                    if (restore_last && prevDisplayMetrics != null && !restoringFromDB && IsResizableWindow(hwnd))
-                    {
-                        Log.Trace($"restore {windowTitle[hwnd]} to last captured position");
-                        restoringFromMem = true;
-                        RestoreApplicationsOnCurrentDisplays(curDisplayKey, hwnd, prevDisplayMetrics.CaptureTime);
-                        restoringFromMem = false;
-                        return false;
-                    }
-                }
             }
             else if (!monitorApplications[displayKey].ContainsKey(hwnd))
             {
@@ -3507,11 +3668,6 @@ namespace PersistentWindows.Common
                 */
             }
 
-            if (restoringFullScreenWindow)
-                return;
-
-            restoringFullScreenWindow = true;
-
             bool wrong_screen = false;
             RECT cur_rect = new RECT();
             User32.GetWindowRect(hwnd, ref cur_rect);
@@ -3544,10 +3700,9 @@ namespace PersistentWindows.Common
                 0, 0, 0, UIntPtr.Zero);
             Log.Error("restore full screen window {0}", GetWindowTitle(hwnd));
 
+            /*
             Thread.Sleep(3 * double_clck_interval);
 
-            restoringFullScreenWindow = false;
-
             style = User32.GetWindowLong(hwnd, User32.GWL_STYLE);
             if ((style & (long)WindowStyleFlags.CAPTION) == 0L)
             {
@@ -3570,6 +3725,7 @@ namespace PersistentWindows.Common
             }
 
             Log.Error("fail to restore full screen window {0}", GetWindowTitle(hwnd));
+            */
         }
 
         private void RestoreSnapWindow(IntPtr hwnd, RECT target_pos)
@@ -4318,6 +4474,7 @@ namespace PersistentWindows.Common
                     if (restore_fullscreen)
                     {
                         if (restoreTimes > 0 && sWindow == null) //#246, let other windows restore first
+                        lock(restoringFullScreenWindow)
                         RestoreFullScreenWindow(hWnd, rect);
                     }
                     else if (restoreTimes >= MinRestoreTimes - 1)

Ninjacrab.PersistentWindows.Solution/Common/WinApiBridge/User32.cs

@@ -624,6 +624,9 @@ namespace PersistentWindows.Common.WinApiBridge
         [DllImport("kernel32.dll", SetLastError = true)]
         public static extern bool CloseHandle(IntPtr hHandle);
 
+        [DllImport("kernel32")]
+        public static extern UInt64 GetTickCount64();
+
         [DllImport("kernel32.dll", SetLastError = true)]
         public static extern IntPtr OpenProcess(
             ProcessAccessFlags processAccess,

Ninjacrab.PersistentWindows.Solution/Common/WinApiBridge/WindowsPosition.cs

@@ -61,5 +61,11 @@ namespace PersistentWindows.Common.WinApiBridge
         {
             return string.Format("({0}, {1}), {2} x {3}", Left, Top, Width, Height);
         }
+
+        public int Diff(RECT r)
+        {
+            int diff = Math.Abs(Left - r.Left) + Math.Abs(Right - r.Right) + Math.Abs(Top - r.Top) + Math.Abs(Bottom - r.Bottom);
+            return diff / 4;
+        }
     }
 }

Ninjacrab.PersistentWindows.Solution/SystrayShell/Program.cs

@@ -56,6 +56,15 @@ if not errorlevel 1 goto wait_to_finish";
 
             pwp = new PersistentWindowProcessor();
 
+            var process = Process.GetCurrentProcess();
+            pwp.processPriority = process.PriorityClass;
+            process.PriorityClass = ProcessPriorityClass.High;
+            var timer = new System.Threading.Timer(state =>
+            {
+                process.PriorityClass = pwp.processPriority;
+            });
+            timer.Change(10000, System.Threading.Timeout.Infinite);
+
             bool splash = true;
             int delay_restart = 0;
             int relaunch_delay = 0;
@@ -74,9 +83,10 @@ if not errorlevel 1 goto wait_to_finish";
             bool offscreen_fix = true;
             bool fix_unminimized_window = true;
             bool enhanced_offscreen_fix = false;
+            bool set_pos_match_threshold = false;
             bool auto_restore_missing_windows = false;
             bool auto_restore_from_db_at_startup = false;
-            bool auto_restore_last_capture_at_startup = true;
+            bool auto_restore_last_capture_at_startup = false;
             bool launch_once_per_process_id = true;
             bool check_upgrade = true;
             bool auto_upgrade = false;
@@ -143,6 +153,12 @@ if not errorlevel 1 goto wait_to_finish";
                     restore_snapshot = SnapshotCharToId(arg[0]);
                     continue;
                 }
+                else if (set_pos_match_threshold)
+                {
+                    set_pos_match_threshold = false;
+                    pwp.MaxDiffPos = int.Parse(arg);
+                    continue;
+                }
 
                 switch(arg)
                 {
@@ -260,12 +276,15 @@ if not errorlevel 1 goto wait_to_finish";
                     case "-redraw_desktop":
                         redraw_desktop = true;
                         break;
-                    case "-auto_restore_existing_window_to_last_capture=0":
-                        auto_restore_last_capture_at_startup = false;
+                    case "-auto_restore_existing_window_to_last_capture=1":
+                        auto_restore_last_capture_at_startup = true;
                         break;
                     case "-auto_restore_new_window_to_last_capture=0":
                         pwp.autoRestoreNewWindowToLastCapture = false;
                         break;
+                    case "-pos_match_threshold":
+                        set_pos_match_threshold = true;
+                        break;
                     case "-auto_restore_missing_windows":
                     case "-auto_restore_missing_windows=1":
                         auto_restore_missing_windows = true;

Ninjacrab.PersistentWindows.Solution/SystrayShell/Properties/AssemblyInfo.cs

@@ -31,5 +31,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("5.61.*")]
+[assembly: AssemblyVersion("5.65.*")]
 

Ninjacrab.PersistentWindows.Solution/SystrayShell/SystrayForm.cs

@@ -252,7 +252,16 @@ namespace PersistentWindows.SystrayShell
 
                 if (!upgradeDownloaded.ContainsKey(latestVersion))
                 {
-                    Process.Start(Program.ProjectUrl + "/releases");
+                    string url = Program.ProjectUrl + "/releases";
+                    var os_version = Environment.OSVersion;
+                    if (os_version.Version.Major < 10)
+                        Process.Start(url);
+                    else if (os_version.Version.Build < 22000)
+                        Process.Start(url);
+                    /* windows 11
+                    else
+                        Process.Start(new ProcessStartInfo(url));
+                    */
 
                     var src_file = $"{Program.ProjectUrl}/releases/download/{latestVersion}/{System.Windows.Forms.Application.ProductName}{latestVersion}.zip";
                     var dst_file = $"{Program.AppdataFolder}/upgrade.zip";