Fix a bug that the typed word with the blue underline indicator will be duplicated

Bug: 5466373

Change-Id: I0300c34cb6076b12ecb89cb29bea95288559108f

java/src/com/android/inputmethod/latin/ComposingStateManager.java

@@ -0,0 +1,68 @@
+/**
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.android.inputmethod.latin;
+
+import android.util.Log;
+
+public class ComposingStateManager {
+    private static final String TAG = ComposingStateManager.class.getSimpleName();
+    private static final ComposingStateManager sInstance = new ComposingStateManager();
+    private boolean mAutoCorrectionIndicatorOn;
+    private boolean mIsComposing;
+
+    public static ComposingStateManager getInstance() {
+        return sInstance;
+    }
+
+    private ComposingStateManager() {
+        mAutoCorrectionIndicatorOn = false;
+        mIsComposing = false;
+    }
+
+    public synchronized void onStartComposingText() {
+        if (!mIsComposing) {
+            if (LatinImeLogger.sDBG) {
+                Log.i(TAG, "Start composing text.");
+            }
+            mAutoCorrectionIndicatorOn = false;
+            mIsComposing = true;
+        }
+    }
+
+    public synchronized void onFinishComposingText() {
+        if (mIsComposing) {
+            if (LatinImeLogger.sDBG) {
+                Log.i(TAG, "Finish composing text.");
+            }
+            mAutoCorrectionIndicatorOn = false;
+            mIsComposing = false;
+        }
+    }
+
+    public synchronized boolean isAutoCorrectionIndicatorOn() {
+        return mAutoCorrectionIndicatorOn;
+    }
+
+    public synchronized void setAutoCorrectionIndicatorOn(boolean on) {
+        // Auto-correction indicator should be specified only when the current state is "composing".
+        if (!mIsComposing) return;
+        if (LatinImeLogger.sDBG) {
+            Log.i(TAG, "Set auto correction Indicator: " + on);
+        }
+        mAutoCorrectionIndicatorOn = on;
+    }
+}

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -231,7 +231,7 @@ public class LatinIME extends InputMethodServiceCompatWrapper implements Keyboar
     private CharSequence mEnteredText;
 
     private final ComposingStateManager mComposingStateManager =
-            new ComposingStateManager();
+            ComposingStateManager.getInstance();
 
     public final UIHandler mHandler = new UIHandler(this);
 
@@ -1636,6 +1636,10 @@ public class LatinIME extends InputMethodServiceCompatWrapper implements Keyboar
                     mComposingStateManager.isAutoCorrectionIndicatorOn();
             final boolean newAutoCorrectionIndicator = Utils.willAutoCorrect(words);
             if (oldAutoCorrectionIndicator != newAutoCorrectionIndicator) {
+                if (LatinImeLogger.sDBG) {
+                    Log.d(TAG, "Flip the indicator. " + oldAutoCorrectionIndicator
+                            + " -> " + newAutoCorrectionIndicator);
+                }
                 final CharSequence textWithUnderline = newAutoCorrectionIndicator
                         ? SuggestionSpanUtils.getTextWithAutoCorrectionIndicatorUnderline(
                                 this, mComposingStringBuilder)
@@ -2308,43 +2312,6 @@ public class LatinIME extends InputMethodServiceCompatWrapper implements Keyboar
         showOptionDialogInternal(builder.create());
     }
 
-    private static class ComposingStateManager {
-        private boolean mAutoCorrectionIndicatorOn;
-        private boolean mIsComposing;
-        public ComposingStateManager() {
-            mAutoCorrectionIndicatorOn = false;
-            mIsComposing = false;
-        }
-
-        private void onStartComposingText() {
-            if (!mIsComposing) {
-                if (LatinImeLogger.sDBG) {
-                    Log.i(TAG, "Start composing text.");
-                }
-                mAutoCorrectionIndicatorOn = false;
-                mIsComposing = true;
-            }
-        }
-
-        private void onFinishComposingText() {
-            if (mIsComposing) {
-                if (LatinImeLogger.sDBG) {
-                    Log.i(TAG, "Finish composing text.");
-                }
-                mAutoCorrectionIndicatorOn = false;
-                mIsComposing = false;
-            }
-        }
-
-        public boolean isAutoCorrectionIndicatorOn() {
-            return mAutoCorrectionIndicatorOn;
-        }
-
-        public void setAutoCorrectionIndicatorOn(boolean on) {
-            mAutoCorrectionIndicatorOn = on;
-        }
-    }
-
     @Override
     protected void dump(FileDescriptor fd, PrintWriter fout, String[] args) {
         super.dump(fd, fout, args);