add showing all commands if prompt is whitespace(s)

Source/Editor/Windows/OutputLogWindow.cs

@@ -325,12 +325,17 @@ namespace FlaxEditor.Windows
 
                 // Show commands search popup based on current text input
                 var text = Text.Trim();
-                if (text.Length != 0)
+                bool isWhitespaceOnly = string.IsNullOrWhiteSpace(Text) && !string.IsNullOrEmpty(Text);
+                if (text.Length != 0 || isWhitespaceOnly)
                 {
                     DebugCommands.Search(text, out var matches);
-                    if (matches.Length != 0)
+                    if (matches.Length != 0 || isWhitespaceOnly)
                     {
-                        ShowPopup(ref _searchPopup, matches, text);
+                        string[] commands = [];
+                        if (isWhitespaceOnly)
+                            DebugCommands.GetAllCommands(out commands);
+
+                        ShowPopup(ref _searchPopup, isWhitespaceOnly ? commands : matches, isWhitespaceOnly ? commands[0] : text);
                         return;
                     }
                 }

Source/Engine/Debug/DebugCommands.cpp

@@ -435,6 +435,17 @@ void DebugCommands::InitAsync()
     AsyncTask = Task::StartNew(InitCommands);
 }
 
+void DebugCommands::GetAllCommands(Array<StringView>& commands)
+{
+    EnsureInited();
+    ScopeLock lock(Locker);
+
+    for (auto& command : Commands)
+    {
+        commands.Add(command.Name);
+    }
+}
+
 DebugCommands::CommandFlags DebugCommands::GetCommandFlags(StringView command)
 {
     CommandFlags result = CommandFlags::None;

Source/Engine/Debug/DebugCommands.h

@@ -46,6 +46,13 @@ public:
     /// </summary>
     API_FUNCTION() static void InitAsync();
 
+    /// <summary>
+    /// Gets all available commands.
+    /// </summary>
+    /// <param name="matches">The output list of all commands (unsorted).</param>
+    /// <returns>TODO.</returns>
+    API_FUNCTION() static void GetAllCommands(API_PARAM(Out) Array<StringView, HeapAllocation>& commands);
+
     /// <summary>
     /// Returns flags of the command.
     /// </summary>