SDL: Move Mouse to the Input project instead of Headless.

src/Ryujinx.Input.SDL2/SDL2MouseDriver.cs

@@ -0,0 +1,177 @@
+using Ryujinx.Common.Configuration;
+using Ryujinx.Common.Logging;
+using System;
+using System.Diagnostics;
+using System.Drawing;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using static SDL2.SDL;
+
+namespace Ryujinx.Input.SDL2
+{
+    public class SDL2MouseDriver : IGamepadDriver
+    {
+        private const int CursorHideIdleTime = 5; // seconds
+
+        private bool _isDisposed;
+        private readonly HideCursorMode _hideCursorMode;
+        private bool _isHidden;
+        private long _lastCursorMoveTime;
+
+        public bool[] PressedButtons { get; }
+
+        public Vector2 CurrentPosition { get; private set; }
+        public Vector2 Scroll { get; private set; }
+        public Size ClientSize;
+
+        public SDL2MouseDriver(HideCursorMode hideCursorMode)
+        {
+            PressedButtons = new bool[(int)MouseButton.Count];
+            _hideCursorMode = hideCursorMode;
+
+            if (_hideCursorMode == HideCursorMode.Always)
+            {
+                if (SDL_ShowCursor(SDL_DISABLE) != SDL_DISABLE)
+                {
+                    Logger.Error?.PrintMsg(LogClass.Application, "Failed to disable the cursor.");
+                }
+
+                _isHidden = true;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static MouseButton DriverButtonToMouseButton(uint rawButton)
+        {
+            Debug.Assert(rawButton is > 0 and <= (int)MouseButton.Count);
+
+            return (MouseButton)(rawButton - 1);
+        }
+
+        public void UpdatePosition()
+        {
+            _ = SDL_GetMouseState(out int posX, out int posY);
+            Vector2 position = new(posX, posY);
+
+            if (CurrentPosition != position)
+            {
+                CurrentPosition = position;
+                _lastCursorMoveTime = Stopwatch.GetTimestamp();
+            }
+
+            CheckIdle();
+        }
+
+        private void CheckIdle()
+        {
+            if (_hideCursorMode != HideCursorMode.OnIdle)
+            {
+                return;
+            }
+
+            long cursorMoveDelta = Stopwatch.GetTimestamp() - _lastCursorMoveTime;
+
+            if (cursorMoveDelta >= CursorHideIdleTime * Stopwatch.Frequency)
+            {
+                if (!_isHidden)
+                {
+                    if (SDL_ShowCursor(SDL_DISABLE) != SDL_DISABLE)
+                    {
+                        Logger.Error?.PrintMsg(LogClass.Application, "Failed to disable the cursor.");
+                    }
+
+                    _isHidden = true;
+                }
+            }
+            else
+            {
+                if (_isHidden)
+                {
+                    if (SDL_ShowCursor(SDL_ENABLE) != SDL_ENABLE)
+                    {
+                        Logger.Error?.PrintMsg(LogClass.Application, "Failed to enable the cursor.");
+                    }
+
+                    _isHidden = false;
+                }
+            }
+        }
+
+        public void Update(SDL_Event evnt)
+        {
+            switch (evnt.type)
+            {
+                case SDL_EventType.SDL_MOUSEBUTTONDOWN:
+                case SDL_EventType.SDL_MOUSEBUTTONUP:
+                    uint rawButton = evnt.button.button;
+
+                    if (rawButton > 0 && rawButton <= (int)MouseButton.Count)
+                    {
+                        PressedButtons[(int)DriverButtonToMouseButton(rawButton)] = evnt.type == SDL_EventType.SDL_MOUSEBUTTONDOWN;
+
+                        CurrentPosition = new Vector2(evnt.button.x, evnt.button.y);
+                    }
+
+                    break;
+
+                // NOTE: On Linux using Wayland mouse motion events won't be received at all.
+                case SDL_EventType.SDL_MOUSEMOTION:
+                    CurrentPosition = new Vector2(evnt.motion.x, evnt.motion.y);
+                    _lastCursorMoveTime = Stopwatch.GetTimestamp();
+
+                    break;
+
+                case SDL_EventType.SDL_MOUSEWHEEL:
+                    Scroll = new Vector2(evnt.wheel.x, evnt.wheel.y);
+
+                    break;
+            }
+        }
+
+        public void SetClientSize(int width, int height)
+        {
+            ClientSize = new Size(width, height);
+        }
+
+        public bool IsButtonPressed(MouseButton button)
+        {
+            return PressedButtons[(int)button];
+        }
+
+        public Size GetClientSize()
+        {
+            return ClientSize;
+        }
+
+        public string DriverName => "SDL2";
+
+        public event Action<string> OnGamepadConnected
+        {
+            add { }
+            remove { }
+        }
+
+        public event Action<string> OnGamepadDisconnected
+        {
+            add { }
+            remove { }
+        }
+
+        public ReadOnlySpan<string> GamepadsIds => new[] { "0" };
+
+        public IGamepad GetGamepad(string id)
+        {
+            return new SDL2Mouse(this);
+        }
+
+        public void Dispose()
+        {
+            if (_isDisposed)
+            {
+                return;
+            }
+
+            _isDisposed = true;
+        }
+    }
+}