Raw mouse input WIP

src/com/limelight/binding/input/evdev/EvdevHandler.java

@@ -0,0 +1,128 @@
+package com.limelight.binding.input.evdev;
+
+import java.nio.ByteBuffer;
+
+import com.limelight.LimeLog;
+
+public class EvdevHandler {
+
+	private String absolutePath;
+	private EvdevListener listener;
+	private boolean shutdown = false;
+	
+	private Thread handlerThread = new Thread() {
+		@Override
+		public void run() {
+			// All the finally blocks here make this code look like a mess
+			// but it's important that we get this right to avoid causing
+			// system-wide input problems.
+			
+			// Modify permissions to allow us access
+			if (!EvdevReader.setPermissions(absolutePath, 0666)) {
+				LimeLog.warning("Unable to chmod "+absolutePath);
+				return;
+			}
+			
+			try {
+				// Open the /dev/input/eventX file
+				int fd = EvdevReader.open(absolutePath);
+				if (fd == -1) {
+					LimeLog.warning("Unable to open "+absolutePath);
+					return;
+				}
+				
+				try {
+					// Check if it's a mouse
+					if (!EvdevReader.isMouse(fd)) {
+						// We only handle mice
+						return;
+					}
+					
+					// Grab it for ourselves
+					if (!EvdevReader.grab(fd)) {
+						LimeLog.warning("Unable to grab "+absolutePath);
+						return;
+					}
+					
+					ByteBuffer buffer = ByteBuffer.allocate(EvdevEvent.EVDEV_MAX_EVENT_SIZE);
+					
+					try {
+						while (!isInterrupted() && !shutdown) {
+							EvdevEvent event = EvdevReader.read(fd, buffer);
+							if (event == null) {
+								return;
+							}
+							
+							switch (event.type)
+							{
+							case EvdevEvent.EV_SYN:
+								// Do nothing
+								break;
+								
+							case EvdevEvent.EV_REL:
+								switch (event.code)
+								{
+								case EvdevEvent.REL_X:
+									listener.mouseMove(event.value, 0);
+									break;
+								case EvdevEvent.REL_Y:
+									listener.mouseMove(0, event.value);
+									break;
+								}
+								break;
+								
+							case EvdevEvent.EV_KEY:
+								switch (event.code)
+								{
+								case EvdevEvent.BTN_LEFT:
+									listener.mouseButtonEvent(EvdevListener.BUTTON_LEFT,
+											event.value != 0);
+									break;
+								case EvdevEvent.BTN_MIDDLE:
+									listener.mouseButtonEvent(EvdevListener.BUTTON_MIDDLE,
+											event.value != 0);
+									break;
+								case EvdevEvent.BTN_RIGHT:
+									listener.mouseButtonEvent(EvdevListener.BUTTON_RIGHT,
+											event.value != 0);
+									break;
+								}
+							}
+						}
+					} finally {
+						// Release our grab
+						EvdevReader.ungrab(fd);
+					}
+				} finally {
+					// Close the file
+					EvdevReader.close(fd);
+				}
+			} finally {
+				// Set permissions back
+				EvdevReader.setPermissions(absolutePath, 0066);
+			}
+		}
+	};
+	
+	public EvdevHandler(String absolutePath, EvdevListener listener) {
+		this.absolutePath = absolutePath;
+		this.listener = listener;
+	}
+	
+	public void start() {
+		handlerThread.start();
+	}
+	
+	public void stop() {
+		shutdown = true;
+		handlerThread.interrupt();
+		
+		try {
+			handlerThread.join();
+		} catch (InterruptedException e) {}
+	}
+	
+	public void notifyDeleted() {
+		stop();
+	}
+}