Turn screen on on right-click

The right-click is almost useless on Android, so use it to turn the
screen on.

Add a new control event type (command) to request the server to turn the
screen on.

server/src/main/java/com/genymobile/scrcpy/ControlEvent.java

@@ -9,11 +9,14 @@ public class ControlEvent {
     public static final int TYPE_TEXT = 1;
     public static final int TYPE_MOUSE = 2;
     public static final int TYPE_SCROLL = 3;
+    public static final int TYPE_COMMAND = 4;
+
+    public static final int COMMAND_SCREEN_ON = 0;
 
     private int type;
     private String text;
     private int metaState; // KeyEvent.META_*
-    private int action; // KeyEvent.ACTION_* or MotionEvent.ACTION_*
+    private int action; // KeyEvent.ACTION_* or MotionEvent.ACTION_* or COMMAND_*
     private int keycode; // KeyEvent.KEYCODE_*
     private int buttons; // MotionEvent.BUTTON_*
     private Position position;
@@ -57,6 +60,13 @@ public class ControlEvent {
         return event;
     }
 
+    public static ControlEvent createCommandControlEvent(int action) {
+        ControlEvent event = new ControlEvent();
+        event.type = TYPE_COMMAND;
+        event.action = action;
+        return event;
+    }
+
     public int getType() {
         return type;
     }

server/src/main/java/com/genymobile/scrcpy/ControlEventReader.java

@@ -10,6 +10,7 @@ public class ControlEventReader {
     private static final int KEYCODE_PAYLOAD_LENGTH = 9;
     private static final int MOUSE_PAYLOAD_LENGTH = 13;
     private static final int SCROLL_PAYLOAD_LENGTH = 16;
+    private static final int COMMAND_PAYLOAD_LENGTH = 1;
 
     private final byte[] rawBuffer = new byte[128];
     private final ByteBuffer buffer = ByteBuffer.wrap(rawBuffer);
@@ -86,6 +87,13 @@ public class ControlEventReader {
                 int vScroll = buffer.getInt();
                 return ControlEvent.createScrollControlEvent(position, hScroll, vScroll);
             }
+            case ControlEvent.TYPE_COMMAND: {
+                if (buffer.remaining() < COMMAND_PAYLOAD_LENGTH) {
+                    break;
+                }
+                int action = toUnsigned(buffer.get());
+                return ControlEvent.createCommandControlEvent(action);
+            }
             default:
                 Ln.w("Unknown event type: " + type);
         }

server/src/main/java/com/genymobile/scrcpy/Device.java

@@ -6,6 +6,7 @@ import android.os.RemoteException;
 import android.view.IRotationWatcher;
 
 import com.genymobile.scrcpy.wrappers.InputManager;
+import com.genymobile.scrcpy.wrappers.PowerManager;
 import com.genymobile.scrcpy.wrappers.ServiceManager;
 
 public final class Device {
@@ -93,6 +94,10 @@ public final class Device {
         return serviceManager.getInputManager();
     }
 
+    public PowerManager getPowerManager() {
+        return serviceManager.getPowerManager();
+    }
+
     public void registerRotationWatcher(IRotationWatcher rotationWatcher) {
         serviceManager.getWindowManager().registerRotationWatcher(rotationWatcher);
     }

server/src/main/java/com/genymobile/scrcpy/EventController.java

@@ -9,6 +9,7 @@ import android.view.KeyEvent;
 import android.view.MotionEvent;
 
 import com.genymobile.scrcpy.wrappers.InputManager;
+import com.genymobile.scrcpy.wrappers.PowerManager;
 
 import java.io.IOException;
 
@@ -16,6 +17,7 @@ public class EventController {
 
     private final Device device;
     private final InputManager inputManager;
+    private final PowerManager powerManager;
     private final DesktopConnection connection;
 
     private final KeyCharacterMap charMap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD);
@@ -28,6 +30,7 @@ public class EventController {
         this.device = device;
         this.connection = connection;
         inputManager = device.getInputManager();
+        powerManager = device.getPowerManager();
         initPointer();
     }
 
@@ -79,6 +82,10 @@ public class EventController {
                 break;
             case ControlEvent.TYPE_SCROLL:
                 injectScroll(controlEvent.getPosition(), controlEvent.getHScroll(), controlEvent.getVScroll());
+                break;
+            case ControlEvent.TYPE_COMMAND:
+                executeCommand(controlEvent.getAction());
+                break;
         }
         return true;
     }
@@ -137,7 +144,24 @@ public class EventController {
         return injectEvent(event);
     }
 
+    private boolean injectKeycode(int keyCode) {
+        return injectKeyEvent(KeyEvent.ACTION_DOWN, keyCode, 0, 0)
+                && injectKeyEvent(KeyEvent.ACTION_UP, keyCode, 0, 0);
+    }
+
     private boolean injectEvent(InputEvent event) {
         return inputManager.injectInputEvent(event, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
     }
+
+    private boolean turnScreenOn() {
+        return powerManager.isScreenOn() || injectKeycode(KeyEvent.KEYCODE_POWER);
+    }
+
+    private boolean executeCommand(int action) {
+        switch (action) {
+            case ControlEvent.COMMAND_SCREEN_ON:
+                return turnScreenOn();
+        }
+        return false;
+    }
 }

server/src/main/java/com/genymobile/scrcpy/wrappers/PowerManager.java

@@ -0,0 +1,30 @@
+package com.genymobile.scrcpy.wrappers;
+
+import android.os.Build;
+import android.os.IInterface;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class PowerManager {
+    private final IInterface manager;
+    private final Method isScreenOnMethod;
+
+    public PowerManager(IInterface manager) {
+        this.manager = manager;
+        try {
+            String methodName = Build.VERSION.SDK_INT >= 20 ? "isInteractive" : "isScreenOn";
+            isScreenOnMethod = manager.getClass().getMethod(methodName);
+        } catch (NoSuchMethodException e) {
+            throw new AssertionError(e);
+        }
+    }
+
+    public boolean isScreenOn() {
+        try {
+            return (Boolean) isScreenOnMethod.invoke(manager);
+        } catch (InvocationTargetException | IllegalAccessException e) {
+            throw new AssertionError(e);
+        }
+    }
+}

server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java

@@ -37,4 +37,8 @@ public class ServiceManager {
     public InputManager getInputManager() {
         return new InputManager(getService("input", "android.hardware.input.IInputManager"));
     }
+
+    public PowerManager getPowerManager() {
+        return new PowerManager(getService("power", "android.os.IPowerManager"));
+    }
 }