Inline software keyboard without input pop up dialog (#2180)

* Initial implementation

* Refactor dynamic text input keys out to facilitate configuration via UI

* Fix code styling

* Add per applet indirect layer handles

* Remove static functions from SoftwareKeyboardRenderer

* Remove inline keyboard reset delay

* Remove inline keyboard V2 responses

* Add inline keyboard soft-lock recovering

* Add comments

* Forward accept and cancel key names to the keyboard and add soft-lock prevention line

* Add dummy window to handle paste events

* Rework inline keyboard state machine and graphics

* Implement IHostUiHandler interfaces on headless WindowBase class

* Add inline keyboard assets

* Fix coding style

* Fix coding style

* Change mode cycling shortcut to F6

* Fix invalid calc size error in games using extended calc

* Remove unnecessary namespaces

Ryujinx.Headless.SDL2/HeadlessDynamicTextInputHandler.cs

@@ -0,0 +1,51 @@
+using Ryujinx.HLE.Ui;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Ryujinx.Headless.SDL2
+{
+    /// <summary>
+    /// Headless text processing class, right now there is no way to forward the input to it.
+    /// </summary>
+    internal class HeadlessDynamicTextInputHandler : IDynamicTextInputHandler
+    {
+        private bool _canProcessInput;
+
+        public event DynamicTextChangedHandler TextChangedEvent;
+        public event KeyPressedHandler         KeyPressedEvent  { add { } remove { } }
+        public event KeyReleasedHandler        KeyReleasedEvent { add { } remove { } }
+
+        public bool TextProcessingEnabled
+        {
+            get
+            {
+                return Volatile.Read(ref _canProcessInput);
+            }
+
+            set
+            {
+                Volatile.Write(ref _canProcessInput, value);
+
+                // Launch a task to update the text.
+                Task.Run(() =>
+                {
+                    Thread.Sleep(100);
+                    TextChangedEvent?.Invoke("Ryujinx", 7, 7, false);
+                });
+            }
+        }
+
+        public HeadlessDynamicTextInputHandler()
+        {
+            // Start with input processing turned off so the text box won't accumulate text
+            // if the user is playing on the keyboard.
+            _canProcessInput = false;
+        }
+
+        public void SetText(string text, int cursorBegin) { }
+
+        public void SetText(string text, int cursorBegin, int cursorEnd) { }
+
+        public void Dispose() { }
+    }
+}

Ryujinx.Headless.SDL2/HeadlessHostUiTheme.cs

@@ -0,0 +1,17 @@
+using Ryujinx.HLE.Ui;
+
+namespace Ryujinx.Headless.SDL2
+{
+    internal class HeadlessHostUiTheme : IHostUiTheme
+    {
+        public string FontFamily => "sans-serif";
+
+        public ThemeColor DefaultBackgroundColor => new ThemeColor(1, 0, 0, 0);
+        public ThemeColor DefaultForegroundColor => new ThemeColor(1, 1, 1, 1);
+        public ThemeColor DefaultBorderColor => new ThemeColor(1, 1, 1, 1);
+        public ThemeColor SelectionBackgroundColor => new ThemeColor(1, 1, 1, 1);
+        public ThemeColor SelectionForegroundColor => new ThemeColor(1, 0, 0, 0);
+
+        public HeadlessHostUiTheme() { }
+    }
+}

Ryujinx.Headless.SDL2/WindowBase.cs

@@ -4,10 +4,9 @@ using Ryujinx.Common.Configuration.Hid;
 using Ryujinx.Common.Logging;
 using Ryujinx.Graphics.GAL;
 using Ryujinx.Graphics.GAL.Multithreading;
-using Ryujinx.HLE;
 using Ryujinx.HLE.HOS.Applets;
 using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy.Types;
-using Ryujinx.HLE.HOS.Services.Hid;
+using Ryujinx.HLE.Ui;
 using Ryujinx.Input;
 using Ryujinx.Input.HLE;
 using Ryujinx.SDL2.Common;
@@ -35,6 +34,9 @@ namespace Ryujinx.Headless.SDL2
         public event EventHandler<StatusUpdatedEventArgs> StatusUpdatedEvent;
 
         protected IntPtr WindowHandle { get; set; }
+
+        public IHostUiTheme HostUiTheme { get; }
+
         protected SDL2MouseDriver MouseDriver;
         private InputManager _inputManager;
         private IKeyboard _keyboardInterface;
@@ -67,6 +69,7 @@ namespace Ryujinx.Headless.SDL2
             _exitEvent = new ManualResetEvent(false);
             _aspectRatio = aspectRatio;
             _enableMouse = enableMouse;
+            HostUiTheme = new HeadlessHostUiTheme();
 
             SDL2Driver.Instance.Initialize();
         }
@@ -353,6 +356,11 @@ namespace Ryujinx.Headless.SDL2
             return DisplayMessageDialog("Controller Applet", message);
         }
 
+        public IDynamicTextInputHandler CreateDynamicTextInputHandler()
+        {
+            return new HeadlessDynamicTextInputHandler();
+        }
+
         public void ExecuteProgram(Switch device, ProgramSpecifyKind kind, ulong value)
         {
             device.Configuration.UserChannelPersistence.ExecuteProgram(kind, value);