Merge changes Ib5ea8131,I571d6cc9

* changes:
  Add a new API IMM#dispatchKeyEventFromInputMethod().
  BaseInputConnection shouldn't rely on @hide APIs.
diff --git a/api/current.txt b/api/current.txt
index 20ca356..3c60b02 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -43646,6 +43646,7 @@
   }
 
   public final class InputMethodManager {
+    method public void dispatchKeyEventFromInputMethod(android.view.View, android.view.KeyEvent);
     method public void displayCompletions(android.view.View, android.view.inputmethod.CompletionInfo[]);
     method public android.view.inputmethod.InputMethodSubtype getCurrentInputMethodSubtype();
     method public java.util.List<android.view.inputmethod.InputMethodInfo> getEnabledInputMethodList();
diff --git a/api/system-current.txt b/api/system-current.txt
index 5dc14d2..d5b7a18 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -46008,6 +46008,7 @@
   }
 
   public final class InputMethodManager {
+    method public void dispatchKeyEventFromInputMethod(android.view.View, android.view.KeyEvent);
     method public void displayCompletions(android.view.View, android.view.inputmethod.CompletionInfo[]);
     method public android.view.inputmethod.InputMethodSubtype getCurrentInputMethodSubtype();
     method public java.util.List<android.view.inputmethod.InputMethodInfo> getEnabledInputMethodList();
diff --git a/api/test-current.txt b/api/test-current.txt
index 716a5a4..4060b30 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -43662,6 +43662,7 @@
   }
 
   public final class InputMethodManager {
+    method public void dispatchKeyEventFromInputMethod(android.view.View, android.view.KeyEvent);
     method public void displayCompletions(android.view.View, android.view.inputmethod.CompletionInfo[]);
     method public android.view.inputmethod.InputMethodSubtype getCurrentInputMethodSubtype();
     method public java.util.List<android.view.inputmethod.InputMethodInfo> getEnabledInputMethodList();
diff --git a/core/java/android/view/inputmethod/BaseInputConnection.java b/core/java/android/view/inputmethod/BaseInputConnection.java
index 6e5e591..bdf89e9 100644
--- a/core/java/android/view/inputmethod/BaseInputConnection.java
+++ b/core/java/android/view/inputmethod/BaseInputConnection.java
@@ -195,7 +195,6 @@
     public boolean commitText(CharSequence text, int newCursorPosition) {
         if (DEBUG) Log.v(TAG, "commitText " + text);
         replaceText(text, newCursorPosition, false);
-        mIMM.notifyUserAction();
         sendCurrentText();
         return true;
     }
@@ -450,7 +449,6 @@
     public boolean setComposingText(CharSequence text, int newCursorPosition) {
         if (DEBUG) Log.v(TAG, "setComposingText " + text);
         replaceText(text, newCursorPosition, true);
-        mIMM.notifyUserAction();
         return true;
     }
 
@@ -523,29 +521,17 @@
      * attached to the input connection's view.
      */
     public boolean sendKeyEvent(KeyEvent event) {
-        synchronized (mIMM.mH) {
-            ViewRootImpl viewRootImpl = mTargetView != null ? mTargetView.getViewRootImpl() : null;
-            if (viewRootImpl == null) {
-                if (mIMM.mServedView != null) {
-                    viewRootImpl = mIMM.mServedView.getViewRootImpl();
-                }
-            }
-            if (viewRootImpl != null) {
-                viewRootImpl.dispatchKeyFromIme(event);
-            }
-        }
-        mIMM.notifyUserAction();
+        mIMM.dispatchKeyEventFromInputMethod(mTargetView, event);
         return false;
     }
-    
+
     /**
      * Updates InputMethodManager with the current fullscreen mode.
      */
     public boolean reportFullscreenMode(boolean enabled) {
-        mIMM.setFullscreenMode(enabled);
         return true;
     }
-    
+
     private void sendCurrentText() {
         if (!mDummyMode) {
             return;
diff --git a/core/java/android/view/inputmethod/InputMethodManager.java b/core/java/android/view/inputmethod/InputMethodManager.java
index 5e07347..9647345 100644
--- a/core/java/android/view/inputmethod/InputMethodManager.java
+++ b/core/java/android/view/inputmethod/InputMethodManager.java
@@ -25,6 +25,8 @@
 import com.android.internal.view.InputBindResult;
 import com.android.internal.view.InputMethodClient;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
 import android.content.Context;
 import android.graphics.Rect;
@@ -527,7 +529,7 @@
             }
         }
     }
-    
+
     private static class ControlledInputConnectionWrapper extends IInputConnectionWrapper {
         private final InputMethodManager mParentInputMethodManager;
         private boolean mActive;
@@ -549,13 +551,23 @@
         }
 
         @Override
+        protected void onUserAction() {
+            mParentInputMethodManager.notifyUserAction();
+        }
+
+        @Override
+        protected void onReportFullscreenMode(boolean enabled) {
+            mParentInputMethodManager.setFullscreenMode(enabled);
+        }
+
+        @Override
         public String toString() {
             return "ControlledInputConnectionWrapper{mActive=" + mActive
                     + " mParentInputMethodManager.mActive=" + mParentInputMethodManager.mActive
                     + "}";
         }
     }
-    
+
     final IInputMethodClient.Stub mClient = new IInputMethodClient.Stub() {
         @Override
         protected void dump(FileDescriptor fd, PrintWriter fout, String[] args) {
@@ -1813,6 +1825,34 @@
         return DISPATCH_NOT_HANDLED;
     }
 
+    /**
+     * Provides the default implementation of {@link InputConnection#sendKeyEvent(KeyEvent)}, which
+     * is expected to dispatch an keyboard event sent from the IME to an appropriate event target
+     * depending on the given {@link View} and the current focus state.
+     *
+     * <p>CAUTION: This method is provided only for the situation where
+     * {@link InputConnection#sendKeyEvent(KeyEvent)} needs to be implemented without relying on
+     * {@link BaseInputConnection}. Do not use this API for anything else.</p>
+     *
+     * @param targetView the default target view. If {@code null} is specified, then this method
+     * tries to find a good event target based on the current focus state.
+     * @param event the key event to be dispatched.
+     */
+    public void dispatchKeyEventFromInputMethod(@Nullable View targetView,
+            @NonNull KeyEvent event) {
+        synchronized (mH) {
+            ViewRootImpl viewRootImpl = targetView != null ? targetView.getViewRootImpl() : null;
+            if (viewRootImpl == null) {
+                if (mServedView != null) {
+                    viewRootImpl = mServedView.getViewRootImpl();
+                }
+            }
+            if (viewRootImpl != null) {
+                viewRootImpl.dispatchKeyFromIme(event);
+            }
+        }
+    }
+
     // Must be called on the main looper
     void sendInputEventAndReportResultOnMainLooper(PendingEvent p) {
         final boolean handled;
diff --git a/core/java/com/android/internal/view/IInputConnectionWrapper.java b/core/java/com/android/internal/view/IInputConnectionWrapper.java
index 85ec29c..0e7f06b 100644
--- a/core/java/com/android/internal/view/IInputConnectionWrapper.java
+++ b/core/java/com/android/internal/view/IInputConnectionWrapper.java
@@ -30,7 +30,7 @@
 
 import java.lang.ref.WeakReference;
 
-public class IInputConnectionWrapper extends IInputContext.Stub {
+public abstract class IInputConnectionWrapper extends IInputContext.Stub {
     static final String TAG = "IInputConnectionWrapper";
 
     private static final int DO_GET_TEXT_AFTER_CURSOR = 10;
@@ -80,15 +80,25 @@
     }
     
     public IInputConnectionWrapper(Looper mainLooper, InputConnection conn) {
-        mInputConnection = new WeakReference<InputConnection>(conn);
+        mInputConnection = new WeakReference<>(conn);
         mMainLooper = mainLooper;
         mH = new MyHandler(mMainLooper);
     }
 
-    public boolean isActive() {
-        return true;
-    }
-    
+    abstract protected boolean isActive();
+
+    /**
+     * Called when the user took some actions that should be taken into consideration to update the
+     * LRU list for input method rotation.
+     */
+    abstract protected void onUserAction();
+
+    /**
+     * Called when the input method started or stopped full-screen mode.
+     *
+     */
+    abstract protected void onReportFullscreenMode(boolean enabled);
+
     public void getTextAfterCursor(int length, int flags, int seq, IInputContextCallback callback) {
         dispatchMessage(obtainMessageIISC(DO_GET_TEXT_AFTER_CURSOR, length, flags, seq, callback));
     }
@@ -284,6 +294,7 @@
                     return;
                 }
                 ic.commitText((CharSequence)msg.obj, msg.arg1);
+                onUserAction();
                 return;
             }
             case DO_SET_SELECTION: {
@@ -338,6 +349,7 @@
                     return;
                 }
                 ic.setComposingText((CharSequence)msg.obj, msg.arg1);
+                onUserAction();
                 return;
             }
             case DO_SET_COMPOSING_REGION: {
@@ -369,6 +381,7 @@
                     return;
                 }
                 ic.sendKeyEvent((KeyEvent)msg.obj);
+                onUserAction();
                 return;
             }
             case DO_CLEAR_META_KEY_STATES: {
@@ -413,7 +426,9 @@
                     Log.w(TAG, "reportFullscreenMode on inexistent InputConnection");
                     return;
                 }
-                ic.reportFullscreenMode(msg.arg1 == 1);
+                final boolean enabled = msg.arg1 == 1;
+                ic.reportFullscreenMode(enabled);
+                onReportFullscreenMode(enabled);
                 return;
             }
             case DO_PERFORM_PRIVATE_COMMAND: {