Reduce jankiness of the transition between a text field with FLAG_NO_FULLSCREEN and a text field with FLAG_NO_EXTRACT_UI

Bug: 7393485

Currently, the extract text view blinks at the transition of InputMethodService.
This change reduces this blinking by making the extract text view invisible when the extract text view is hidden.

Change-Id: I9af96058283a9a5b60707d025ad1abbbbc23c16f

Author: satok16

core/java/android/inputmethodservice/InputMethodService.java

@@ -930,11 +930,13 @@ public void updateFullscreenMode() {
      */
     public void onConfigureWindow(Window win, boolean isFullscreen,
             boolean isCandidatesOnly) {
-        if (isFullscreen) {
-            mWindow.getWindow().setLayout(MATCH_PARENT, MATCH_PARENT);
-        } else {
-            mWindow.getWindow().setLayout(MATCH_PARENT, WRAP_CONTENT);
+        final int currentHeight = mWindow.getWindow().getAttributes().height;
+        final int newHeight = isFullscreen ? MATCH_PARENT : WRAP_CONTENT;
+        if (mIsInputViewShown && currentHeight != newHeight) {
+            Log.w(TAG, "Window size has been changed. This may cause jankiness of resizing window: "
+                    + currentHeight + " -> " + newHeight);
         }
+        mWindow.getWindow().setLayout(MATCH_PARENT, newHeight);
     }
 
     /**
@@ -997,10 +999,11 @@ public boolean isExtractViewShown() {
     }
 
     void updateExtractFrameVisibility() {
-        int vis;
+        final int vis;
         if (isFullscreenMode()) {
             vis = mExtractViewHidden ? View.INVISIBLE : View.VISIBLE;
-            mExtractFrame.setVisibility(View.VISIBLE);
+            // "vis" should be applied for the extract frame as well in the fullscreen mode.
+            mExtractFrame.setVisibility(vis);
         } else {
             vis = View.VISIBLE;
             mExtractFrame.setVisibility(View.GONE);