Put Processes with Visible Window On the Top & Do not kill FL Process

Flow.Launcher.Infrastructure/FileExplorerHelper.cs

@@ -67,8 +67,6 @@ private static dynamic GetActiveExplorer()
             return explorerWindows.Zip(zOrders).MinBy(x => x.Second).First;
         }
 
-        private delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);
-
         /// <summary>
         /// Gets the z-order for one or more windows atomically with respect to each other. In Windows, smaller z-order is higher. If the window is not top level, the z order is returned as -1. 
         /// </summary>

Plugins/Flow.Launcher.Plugin.ProcessKiller/Flow.Launcher.Plugin.ProcessKiller.csproj

@@ -58,7 +58,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\Flow.Launcher.Infrastructure\Flow.Launcher.Infrastructure.csproj" />
     <ProjectReference Include="..\..\Flow.Launcher.Plugin\Flow.Launcher.Plugin.csproj" />
   </ItemGroup>
 

Plugins/Flow.Launcher.Plugin.ProcessKiller/Main.cs

@@ -1,12 +1,12 @@
+using System;
 using System.Collections.Generic;
 using System.Linq;
-using Flow.Launcher.Infrastructure;
 
 namespace Flow.Launcher.Plugin.ProcessKiller
 {
     public class Main : IPlugin, IPluginI18n, IContextMenu
     {
-        private ProcessHelper processHelper = new ProcessHelper();
+        private readonly ProcessHelper processHelper = new();
 
         private static PluginInitContext _context;
 
@@ -48,7 +48,7 @@ public List<Result> LoadContextMenus(Result result)
                     {
                         foreach (var p in similarProcesses)
                         {
-                            processHelper.TryKill(p);
+                            processHelper.TryKill(_context, p);
                         }
 
                         return true;
@@ -62,45 +62,99 @@ public List<Result> LoadContextMenus(Result result)
 
         private List<Result> CreateResultsFromQuery(Query query)
         {
-            string termToSearch = query.Search;
-            var processlist = processHelper.GetMatchingProcesses(termToSearch);
-
-            if (!processlist.Any())
+            // Get all non-system processes
+            var allPocessList = processHelper.GetMatchingProcesses();
+            if (!allPocessList.Any())
             {
                 return null;
             }
 
-            var results = new List<Result>();
+            // Filter processes based on search term
+            var searchTerm = query.Search;
+            var processlist = new List<ProcessResult>();
+            var processWindowTitle = ProcessHelper.GetProcessesWithNonEmptyWindowTitle();
+            if (string.IsNullOrWhiteSpace(searchTerm))
+            {
+                foreach (var p in allPocessList)
+                {
+                    var progressNameIdTitle = ProcessHelper.GetProcessNameIdTitle(p);
+
+                    if (processWindowTitle.TryGetValue(p.Id, out var windowTitle))
+                    {
+                        // Add score to prioritize processes with visible windows
+                        // And use window title for those processes
+                        processlist.Add(new ProcessResult(p, 200, windowTitle, null, progressNameIdTitle));
+                    }
+                    else
+                    {
+                        processlist.Add(new ProcessResult(p, 0, progressNameIdTitle, null, progressNameIdTitle));
+                    }
+                }
+            }
+            else
+            {
+                foreach (var p in allPocessList)
+                {
+                    var progressNameIdTitle = ProcessHelper.GetProcessNameIdTitle(p);
+
+                    if (processWindowTitle.TryGetValue(p.Id, out var windowTitle))
+                    {
+                        // Get max score from searching process name, window title and process id
+                        var windowTitleMatch = _context.API.FuzzySearch(searchTerm, windowTitle);
+                        var processNameIdMatch = _context.API.FuzzySearch(searchTerm, progressNameIdTitle);
+                        var score = Math.Max(windowTitleMatch.Score, processNameIdMatch.Score);
+                        if (score > 0)
+                        {
+                            // Add score to prioritize processes with visible windows
+                            // And use window title for those processes
+                            score += 200;
+                            processlist.Add(new ProcessResult(p, score, windowTitle, 
+                                score == windowTitleMatch.Score ? windowTitleMatch : null, progressNameIdTitle));
+                        }
+                    }
+                    else
+                    {
+                        var processNameIdMatch = _context.API.FuzzySearch(searchTerm, progressNameIdTitle);
+                        var score = processNameIdMatch.Score;
+                        if (score > 0)
+                        {
+                            processlist.Add(new ProcessResult(p, score, progressNameIdTitle, processNameIdMatch, progressNameIdTitle));
+                        }
+                    }
+                }
+            }
 
+            var results = new List<Result>();
             foreach (var pr in processlist)
             {
                 var p = pr.Process;
                 var path = processHelper.TryGetProcessFilename(p);
                 results.Add(new Result()
                 {
                     IcoPath = path,
-                    Title = p.ProcessName + " - " + p.Id,
+                    Title = pr.Title,
+                    TitleToolTip = pr.Tooltip,
                     SubTitle = path,
-                    TitleHighlightData = StringMatcher.FuzzySearch(termToSearch, p.ProcessName).MatchData,
+                    TitleHighlightData = pr.TitleMatch?.MatchData,
                     Score = pr.Score,
                     ContextData = p.ProcessName,
                     AutoCompleteText = $"{_context.CurrentPluginMetadata.ActionKeyword}{Plugin.Query.TermSeparator}{p.ProcessName}",
                     Action = (c) =>
                     {
-                        processHelper.TryKill(p);
-                        // Re-query to refresh process list
-                        _context.API.ChangeQuery(query.RawQuery, true);
-                        return true;
+                        processHelper.TryKill(_context, p);
+                        _context.API.ReQuery();
+                        return false;
                     }
                 });
             }
 
+            // Order results by process name for processes without visible windows
             var sortedResults = results.OrderBy(x => x.Title).ToList();
 
             // When there are multiple results AND all of them are instances of the same executable
             // add a quick option to kill them all at the top of the results.
             var firstResult = sortedResults.FirstOrDefault(x => !string.IsNullOrEmpty(x.SubTitle));
-            if (processlist.Count > 1 && !string.IsNullOrEmpty(termToSearch) && sortedResults.All(r => r.SubTitle == firstResult?.SubTitle))
+            if (processlist.Count > 1 && !string.IsNullOrEmpty(searchTerm) && sortedResults.All(r => r.SubTitle == firstResult?.SubTitle))
             {
                 sortedResults.Insert(1, new Result()
                 {
@@ -112,11 +166,10 @@ private List<Result> CreateResultsFromQuery(Query query)
                     {
                         foreach (var p in processlist)
                         {
-                            processHelper.TryKill(p.Process);
+                            processHelper.TryKill(_context, p.Process);
                         }
-                        // Re-query to refresh process list
-                        _context.API.ChangeQuery(query.RawQuery, true);
-                        return true;
+                        _context.API.ReQuery();
+                        return false;
                     }
                 });
             }

Plugins/Flow.Launcher.Plugin.ProcessKiller/NativeMethods.txt

@@ -1,2 +1,7 @@
 QueryFullProcessImageName
-OpenProcess
+OpenProcess
+EnumWindows
+GetWindowTextLength
+GetWindowText
+IsWindowVisible
+GetWindowThreadProcessId

Plugins/Flow.Launcher.Plugin.ProcessKiller/ProcessHelper.cs

@@ -1,6 +1,4 @@
-using Flow.Launcher.Infrastructure;
-using Flow.Launcher.Infrastructure.Logger;
-using Microsoft.Win32.SafeHandles;
+using Microsoft.Win32.SafeHandles;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -13,7 +11,7 @@ namespace Flow.Launcher.Plugin.ProcessKiller
 {
     internal class ProcessHelper
     {
-        private readonly HashSet<string> _systemProcessList = new HashSet<string>()
+        private readonly HashSet<string> _systemProcessList = new()
         {
             "conhost",
             "svchost",
@@ -31,35 +29,80 @@ internal class ProcessHelper
             "explorer" 
         };
 
-        private bool IsSystemProcess(Process p) => _systemProcessList.Contains(p.ProcessName.ToLower());
+        private const string FlowLauncherProcessName = "Flow.Launcher";
+
+        private bool IsSystemProcess(Process p) => _systemProcessList.Contains(p.ProcessName.ToLower()) ||
+            string.Compare(p.ProcessName, FlowLauncherProcessName, StringComparison.OrdinalIgnoreCase) == 0;
 
         /// <summary>
-        /// Returns a ProcessResult for evey running non-system process whose name matches the given searchTerm
+        /// Get title based on process name and id
         /// </summary>
-        public List<ProcessResult> GetMatchingProcesses(string searchTerm)
+        public static string GetProcessNameIdTitle(Process p)
         {
-            var processlist = new List<ProcessResult>();
+            return p.ProcessName + " - " + p.Id;
+        }
+
+        /// <summary>
+        /// Returns a Process for evey running non-system process
+        /// </summary>
+        public List<Process> GetMatchingProcesses()
+        {
+            var processlist = new List<Process>();
 
             foreach (var p in Process.GetProcesses())
             {
                 if (IsSystemProcess(p)) continue;
 
-                if (string.IsNullOrWhiteSpace(searchTerm))
-                {
-                    // show all non-system processes
-                    processlist.Add(new ProcessResult(p, 0));
-                }
-                else
+                processlist.Add(p);
+            }
+
+            return processlist;
+        }
+
+        /// <summary>
+        /// Returns a dictionary of process IDs and their window titles for processes that have a visible main window with a non-empty title.
+        /// </summary>
+        public static unsafe Dictionary<int, string> GetProcessesWithNonEmptyWindowTitle()
+        {
+            var processDict = new Dictionary<int, string>();
+            PInvoke.EnumWindows((hWnd, _) =>
+            {
+                var windowTitle = GetWindowTitle(hWnd);
+                if (!string.IsNullOrWhiteSpace(windowTitle) && PInvoke.IsWindowVisible(hWnd))
                 {
-                    var score = StringMatcher.FuzzySearch(searchTerm, p.ProcessName + p.Id).Score;
-                    if (score > 0)
+                    uint processId = 0;
+                    var result = PInvoke.GetWindowThreadProcessId(hWnd, &processId);
+                    if (result == 0u || processId == 0u)
                     {
-                        processlist.Add(new ProcessResult(p, score));
+                        return false;
+                    }
+
+                    var process = Process.GetProcessById((int)processId);
+                    if (!processDict.ContainsKey((int)processId))
+                    {
+                        processDict.Add((int)processId, windowTitle);
                     }
                 }
+
+                return true;
+            }, IntPtr.Zero);
+
+            return processDict;
+        }
+
+        private static unsafe string GetWindowTitle(HWND hwnd)
+        {
+            var capacity = PInvoke.GetWindowTextLength(hwnd) + 1;
+            int length;
+            Span<char> buffer = capacity < 1024 ? stackalloc char[capacity] : new char[capacity];
+            fixed (char* pBuffer = buffer)
+            {
+                // If the window has no title bar or text, if the title bar is empty,
+                // or if the window or control handle is invalid, the return value is zero.
+                length = PInvoke.GetWindowText(hwnd, pBuffer, capacity);
             }
 
-            return processlist;
+            return buffer[..length].ToString();
         }
 
         /// <summary>
@@ -70,7 +113,7 @@ public IEnumerable<Process> GetSimilarProcesses(string processPath)
             return Process.GetProcesses().Where(p => !IsSystemProcess(p) && TryGetProcessFilename(p) == processPath);
         }
 
-        public void TryKill(Process p)
+        public void TryKill(PluginInitContext context, Process p)
         {
             try
             {
@@ -82,7 +125,7 @@ public void TryKill(Process p)
             }
             catch (Exception e)
             {
-                Log.Exception($"{nameof(ProcessHelper)}", $"Failed to kill process {p.ProcessName}", e);
+                context.API.LogException($"{nameof(ProcessHelper)}", $"Failed to kill process {p.ProcessName}", e);
             }
         }
 

Plugins/Flow.Launcher.Plugin.ProcessKiller/ProcessResult.cs

@@ -1,17 +1,27 @@
 using System.Diagnostics;
+using Flow.Launcher.Plugin.SharedModels;
 
 namespace Flow.Launcher.Plugin.ProcessKiller
 {
     internal class ProcessResult
     {
-        public ProcessResult(Process process, int score)
+        public ProcessResult(Process process, int score, string title, MatchResult match, string tooltip)
         {
             Process = process;
             Score = score;
+            Title = title;
+            TitleMatch = match;
+            Tooltip = tooltip;
         }
 
         public Process Process { get; }
 
         public int Score { get; }
+
+        public string Title { get; }
+
+        public MatchResult TitleMatch { get; }
+
+        public string Tooltip { get; }
     }
-}
+}