TouchEvent (2/n): Receiving touch mode events in InputEventReceiver

This CL enhances InputEventReceiver to receive incoming TouchModeEvent
from the transport layer.

Bug: 191935212
Test: manual (build)
Change-Id: I6dba5ab213f52e26c25d856a3cb8b27bfdb81d40

core/java/android/view/InputEventReceiver.java

@@ -170,6 +170,16 @@ public abstract class InputEventReceiver {
     public void onDragEvent(boolean isExiting, float x, float y) {
     }
 
+    /**
+     * Called when the display for the window associated with the input channel has entered or
+     * exited touch mode.
+     *
+     * @param isInTouchMode {@code true} if the display showing the window associated with the
+     *                                  input channel entered touch mode.
+     */
+    public void onTouchModeChanged(boolean isInTouchMode) {
+    }
+
     /**
      * Called when a batched input event is pending.
      *

core/jni/android_view_InputEventReceiver.cpp

@@ -54,6 +54,7 @@ static struct {
     jmethodID onPointerCaptureEvent;
     jmethodID onDragEvent;
     jmethodID onBatchedInputEventPending;
+    jmethodID onTouchModeChanged;
 } gInputEventReceiverClassInfo;
 
 // Add prefix to the beginning of each line in 'str'
@@ -424,6 +425,18 @@ status_t NativeInputEventReceiver::consumeEvents(JNIEnv* env,
                 finishInputEvent(seq, true /* handled */);
                 continue;
             }
+            case AINPUT_EVENT_TYPE_TOUCH_MODE: {
+                const TouchModeEvent* touchModeEvent = static_cast<TouchModeEvent*>(inputEvent);
+                if (kDebugDispatchCycle) {
+                    ALOGD("channel '%s' ~ Received touch mode event: isInTouchMode=%s",
+                          getInputChannelName().c_str(), toString(touchModeEvent->isInTouchMode()));
+                }
+                env->CallVoidMethod(receiverObj.get(),
+                                    gInputEventReceiverClassInfo.onTouchModeChanged,
+                                    jboolean(touchModeEvent->isInTouchMode()));
+                finishInputEvent(seq, true /* handled */);
+                continue;
+            }
 
             default:
                 assert(false); // InputConsumer should prevent this from ever happening