refactor: extract input sender to an interface for multiple platform support

.idea/.idea.SwitchSlidePresenter/.idea/workspace.xml

@@ -37,11 +37,15 @@
     <setting file="file://$PROJECT_DIR$/SlidePresenter/Program.cs" root0="FORCE_HIGHLIGHTING" />
   </component>
   <component name="MetaFilesCheckinStateConfiguration" checkMetaFiles="true" />
+  <component name="ProblemsViewState">
+    <option name="selectedTabId" value="Toolset" />
+  </component>
   <component name="ProjectColorInfo">{
   &quot;associatedIndex&quot;: 6
 }</component>
   <component name="ProjectId" id="2htCW7BWCLo4IJC4dn1HIEGkg1I" />
   <component name="ProjectLevelVcsManager" settingsEditedManually="true">
+    <OptionsSetting value="false" id="Update" />
     <ConfirmationsSetting value="2" id="Add" />
   </component>
   <component name="ProjectViewState">

SlidePresenter/InputSender/IInputSender.cs

@@ -0,0 +1,6 @@
+namespace SwitchSlidePresenter.InputSender;
+
+public interface IInputSender {
+	void NextSlide();
+	void PreviousSlide();
+}

SlidePresenter/InputSender/WindowsInputSender.cs

@@ -0,0 +1,47 @@
+using System.Runtime.InteropServices;
+using Win32Api;
+
+namespace SwitchSlidePresenter.InputSender;
+
+public class WindowsInputSender : IInputSender {
+	private const uint INPUT_KEYBOARD = 1;
+	private const ushort VK_NEXT = 0x22;
+	private const ushort VK_PRIOR = 0x21;
+	private const uint KEYEVENTF_KEYDOWN = 0x0000;
+	private const uint KEYEVENTF_KEYUP = 0x0002;
+
+	public void NextSlide() => SimulateKeyPress(VK_NEXT);
+	public void PreviousSlide() => SimulateKeyPress(VK_PRIOR);
+
+	private static void SimulateKeyPress(ushort keyCode) {
+		Input[] inputs = new Input[2];
+
+		inputs[0] = new Input {
+			type = INPUT_KEYBOARD,
+			u = new InputUnion {
+				ki = new KeyboardInput {
+					wVk = keyCode,
+					wScan = 0,
+					dwFlags = KEYEVENTF_KEYDOWN,
+					time = 0,
+					dwExtraInfo = IntPtr.Zero
+				}
+			}
+		};
+
+		inputs[1] = new Input {
+			type = INPUT_KEYBOARD,
+			u = new InputUnion {
+				ki = new KeyboardInput {
+					wVk = keyCode,
+					wScan = 0,
+					dwFlags = KEYEVENTF_KEYUP,
+					time = 0,
+					dwExtraInfo = IntPtr.Zero
+				}
+			}
+		};
+
+		Win32Api.Win32Api.SendInput((uint)inputs.Length, inputs, Marshal.SizeOf(typeof(Input)));
+	}
+}

SlidePresenter/SlideSwitcher.cs

@@ -1,16 +1,10 @@
-using System.Runtime.InteropServices;
+using SwitchSlidePresenter.InputSender;
-using Win32Api;
 
 namespace SwitchSlidePresenter;
 
 public class SlideSwitcher : IDisposable {
 	private readonly IGamepadReader? _reader;
-
+	private readonly IInputSender _inputSender = new WindowsInputSender();
-	private const uint INPUT_KEYBOARD = 1;
-	private const ushort VK_NEXT = 0x22;
-	private const ushort VK_PRIOR = 0x21;
-	private const uint KEYEVENTF_KEYDOWN = 0x0000;
-	private const uint KEYEVENTF_KEYUP = 0x0002;
 
 	public SlideSwitcher(IGamepadReader? reader) {
 		_reader = reader;
@@ -23,43 +17,6 @@ public class SlideSwitcher : IDisposable {
 		_reader.PrevSlide -= PreviousSlide;
 	}
 
-	private static void NextSlide() {
+	private void NextSlide() => _inputSender.NextSlide();
-		SimulateKeyPress(VK_NEXT);
+	private void PreviousSlide() => _inputSender.PreviousSlide();
-	}
-
-	private static void PreviousSlide() {
-		SimulateKeyPress(VK_PRIOR);
-	}
-
-	private static void SimulateKeyPress(ushort keyCode) {
-		Input[] inputs = new Input[2];
-
-		inputs[0] = new Input {
-			type = INPUT_KEYBOARD,
-			u = new InputUnion {
-				ki = new KeyboardInput {
-					wVk = keyCode,
-					wScan = 0,
-					dwFlags = KEYEVENTF_KEYDOWN,
-					time = 0,
-					dwExtraInfo = IntPtr.Zero
-				}
-			}
-		};
-
-		inputs[1] = new Input {
-			type = INPUT_KEYBOARD,
-			u = new InputUnion {
-				ki = new KeyboardInput {
-					wVk = keyCode,
-					wScan = 0,
-					dwFlags = KEYEVENTF_KEYUP,
-					time = 0,
-					dwExtraInfo = IntPtr.Zero
-				}
-			}
-		};
-
-		Win32Api.Win32Api.SendInput((uint)inputs.Length, inputs, Marshal.SizeOf(typeof(Input)));
-	}
 }