fix away detection, pause while user is present

src/main/java/wtf/beatrice/autosqueal/controls/CursorMover.java

@@ -8,11 +8,15 @@ import java.awt.*;
 import java.security.SecureRandom;
 import java.util.Random;
 import java.util.concurrent.ScheduledExecutorService;
+import java.util.function.BooleanSupplier;
 
 /**
  * Periodically starts a new movement of the mouse cursor to a random position,
  * or to the top-right corner of the screen for a double click.
  *
+ * The movements only happen when the user is away: while the user is actively
+ * using the machine, they are skipped, so the app never fights for the mouse.
+ *
  * The movement itself is executed by a {@link SingleStepMovementTask}, which
  * re-schedules itself on the shared scheduler until it reaches its destination.
  */
@@ -24,16 +28,25 @@ public class CursorMover implements Runnable
 
     private final Random random = new SecureRandom();
     private final ScheduledExecutorService scheduler;
+    private final RobotMouseTracker robotTracker;
+    private final BooleanSupplier isUserAway;
 
     private int iteration = 0;
 
-    public CursorMover(ScheduledExecutorService scheduler) {
+    public CursorMover(ScheduledExecutorService scheduler, RobotMouseTracker robotTracker, BooleanSupplier isUserAway) {
         this.scheduler = scheduler;
+        this.robotTracker = robotTracker;
+        this.isUserAway = isUserAway;
     }
 
     @Override
     public void run() {
 
+        if (!isUserAway.getAsBoolean()) {
+            LOGGER.debug("User is present, skipping movement");
+            return;
+        }
+
         Point location = MouseInfo.getPointerInfo().getLocation();
         LOGGER.info("Starting coordinates: {}, {}", location.x, location.y);
 
@@ -58,7 +71,7 @@ public class CursorMover implements Runnable
         LOGGER.info("Destination coordinates: {}, {}", destX, destY);
 
         try {
-            SingleStepMovementTask movement = new SingleStepMovementTask(scheduler, destX, destY, click);
+            SingleStepMovementTask movement = new SingleStepMovementTask(scheduler, robotTracker, destX, destY, click);
             scheduler.execute(movement);
         } catch (AWTException ex) {
             LOGGER.error("Could not start movement task", ex);