Add account e-mail addresses to the user dictionary

Bug: 8683365
Change-Id: Id72540c515e61c3dd854892599645dd6d22b496d

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

@@ -16,6 +16,8 @@
 
 package com.android.inputmethod.latin;
 
+import com.android.inputmethod.latin.personalization.AccountUtils;
+
 import android.content.ContentResolver;
 import android.content.Context;
 import android.database.ContentObserver;
@@ -28,6 +30,7 @@ import android.provider.ContactsContract.Contacts;
 import android.text.TextUtils;
 import android.util.Log;
 
+import java.util.List;
 import java.util.Locale;
 
 public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
@@ -105,11 +108,27 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
     @Override
     public void loadDictionaryAsync() {
         clearFusionDictionary();
+        loadDeviceAccountsEmailAddresses();
         loadDictionaryAsyncForUri(ContactsContract.Profile.CONTENT_URI);
         // TODO: Switch this URL to the newer ContactsContract too
         loadDictionaryAsyncForUri(Contacts.CONTENT_URI);
     }
 
+    private void loadDeviceAccountsEmailAddresses() {
+        final List<String> accountVocabulary =
+                AccountUtils.getDeviceAccountsEmailAddresses(mContext);
+        if (accountVocabulary == null || accountVocabulary.isEmpty()) {
+            return;
+        }
+        for (String word : accountVocabulary) {
+            if (DEBUG) {
+                Log.d(TAG, "loadAccountVocabulary: " + word);
+            }
+            super.addWord(word, null /* shortcut */, FREQUENCY_FOR_CONTACTS,
+                    false /* isNotAWord */);
+        }
+    }
+
     private void loadDictionaryAsyncForUri(final Uri uri) {
         try {
             Cursor cursor = mContext.getContentResolver()

java/src/com/android/inputmethod/latin/personalization/AccountUtils.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2013 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.personalization;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.content.Context;
+import android.util.Patterns;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class AccountUtils {
+    private AccountUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    private static Account[] getAccounts(final Context context) {
+        return AccountManager.get(context).getAccounts();
+    }
+
+    public static List<String> getDeviceAccountsEmailAddresses(final Context context) {
+        final ArrayList<String> retval = new ArrayList<String>();
+        for (final Account account : getAccounts(context)) {
+            final String name = account.name;
+            if (Patterns.EMAIL_ADDRESS.matcher(name).matches()) {
+                retval.add(name);
+                retval.add(name.split("@")[0]);
+            }
+        }
+        return retval;
+    }
+}