feat: linux support

SlidePresenter/InputSender/LinuxInputSender.cs

@@ -1,13 +1,32 @@
 #if OS_LINUX
+using System.Diagnostics;
+
 namespace ControllerSlidePresenter.InputSender;
 
 public class LinuxInputSender : IInputSender {
-	public void NextSlide() {
+	private const string PageUp = "0xff55";
+	private const string PageDown = "0xff56";
 
+	public void NextSlide() {
+		SendKeys(PageDown);
 	}
 
 	public void PreviousSlide() {
+		SendKeys(PageUp);
+	}
 
+	private static void SendKeys(string keycode) {
+		Process proc = new() {
+			StartInfo = {
+				FileName = "xdotool",
+				Arguments = $"key {keycode}",
+				UseShellExecute = false,
+				RedirectStandardError = false,
+				RedirectStandardInput = false,
+				RedirectStandardOutput = false
+			}
+		};
+		proc.Start();
 	}
 }
 #endif

SlidePresenter/Linux.cs

@@ -0,0 +1,55 @@
+#if OS_LINUX
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace ControllerSlidePresenter;
+
+public static class Linux {
+	public static bool CanRun() {
+		if (getuid() != 0) {
+			Console.WriteLine("On Linux you need tu run as 'sudo'");
+			return false;
+		}
+		if (!IsXdoToolInstalled())
+			return false;
+
+		return true;
+	}
+
+	private static bool IsXdoToolInstalled() {
+		string result = RunShellCommand("which xdotool");
+		if (!string.IsNullOrEmpty(result))
+			return true;
+
+		Console.WriteLine("xdotool is not installed.");
+		return false;
+	}
+
+	private static string RunShellCommand(string command) {
+		try {
+			ProcessStartInfo procStartInfo = new("bash", "-c \"" + command + "\"") {
+				RedirectStandardOutput = true,
+				UseShellExecute = false,
+				CreateNoWindow = true,
+			};
+
+			using Process process = new();
+			process.StartInfo = procStartInfo;
+			process.Start();
+
+			string result = process.StandardOutput.ReadToEnd();
+			process.WaitForExit();
+
+			return result.Trim();
+		}
+		catch (Exception ex) {
+			Console.WriteLine("Error: " + ex.Message);
+			return string.Empty;
+		}
+	}
+
+
+	[DllImport("libc")]
+	private static extern uint getuid();
+}
+#endif

SlidePresenter/Program.cs

@@ -3,6 +3,11 @@
 namespace ControllerSlidePresenter {
 	internal abstract class Program {
 		private static async Task Main() {
+#if OS_LINUX
+			if (!Linux.CanRun())
+				return;
+#endif
+
 			IGamepadReader? reader = ControllerSelector.GetReader();
 			if (reader == null) {
 				Console.WriteLine("Invalid Controller Selected.");