Have the Latin IME also use the names of your contacts as suggestions.

Bug 1597304

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

@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2009 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 java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.ContentObserver;
+import android.database.Cursor;
+import android.provider.Contacts;
+import android.provider.Contacts.People;
+import android.util.Log;
+
+public class ContactsDictionary extends ExpandableDictionary {
+    
+    private static final String[] PROJECTION = {
+        People._ID,
+        People.NAME,
+    };
+    
+    private static final int INDEX_NAME = 1;
+    
+    private ContentObserver mObserver;
+    
+    private boolean mRequiresReload;
+    
+    public ContactsDictionary(Context context) {
+        super(context);
+        // Perform a managed query. The Activity will handle closing and requerying the cursor
+        // when needed.
+        ContentResolver cres = context.getContentResolver();
+        
+        cres.registerContentObserver(People.CONTENT_URI, true, mObserver = new ContentObserver(null) {
+            @Override
+            public void onChange(boolean self) {
+                mRequiresReload = true;
+            }
+        });
+
+        loadDictionary();
+    }
+    
+    public synchronized void close() {
+        if (mObserver != null) {
+            getContext().getContentResolver().unregisterContentObserver(mObserver);
+            mObserver = null;
+        }
+    }
+    
+    private synchronized void loadDictionary() {
+        Cursor cursor = getContext().getContentResolver()
+                .query(People.CONTENT_URI, PROJECTION, null, null, null);
+        addWords(cursor);
+        mRequiresReload = false;
+    }
+
+    @Override
+    public synchronized void getWords(final WordComposer codes, final WordCallback callback) {
+        if (mRequiresReload) loadDictionary();
+        super.getWords(codes, callback);
+    }
+
+    @Override
+    public synchronized boolean isValidWord(CharSequence word) {
+        if (mRequiresReload) loadDictionary();
+        return super.isValidWord(word);
+    }
+
+    private void addWords(Cursor cursor) {
+        clearDictionary();
+
+        final int maxWordLength = getMaxWordLength();
+        if (cursor.moveToFirst()) {
+            while (!cursor.isAfterLast()) {
+                String name = cursor.getString(INDEX_NAME);
+                int len = name.length();
+
+                // TODO: Better tokenization for non-Latin writing systems
+                for (int i = 0; i < len; i++) {
+                    if (Character.isLetter(name.charAt(i))) {
+                        int j;
+                        for (j = i + 1; j < len; j++) {
+                            char c = name.charAt(j);
+
+                            if (!(c == '-' || c == '\'' ||
+                                  Character.isLetter(c))) {
+                                break;
+                            }
+                        }
+
+                        String word = name.substring(i, j);
+                        i = j - 1;
+
+                        // Safeguard against adding really long words. Stack
+                        // may overflow due to recursion
+                        if (word.length() < maxWordLength) {
+                            super.addWord(word, 128);
+                        }
+                    }
+                }
+
+                cursor.moveToNext();
+            }
+        }
+        cursor.close();
+    }
+}

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

@@ -103,6 +103,7 @@ public class LatinIME extends InputMethodService
     KeyboardSwitcher mKeyboardSwitcher;
     
     private UserDictionary mUserDictionary;
+    private ContactsDictionary mContactsDictionary;
     private ExpandableDictionary mAutoDictionary;
     
     private String mLocale;
@@ -188,8 +189,10 @@ public class LatinIME extends InputMethodService
         mSuggest = new Suggest(this, R.raw.main);
         mSuggest.setCorrectionMode(mCorrectionMode);
         mUserDictionary = new UserDictionary(this);
+        mContactsDictionary = new ContactsDictionary(this);
         mAutoDictionary = new AutoDictionary(this);
         mSuggest.setUserDictionary(mUserDictionary);
+        mSuggest.setContactsDictionary(mContactsDictionary);
         mSuggest.setAutoDictionary(mAutoDictionary);
         mWordSeparators = getResources().getString(R.string.word_separators);
         mSentenceSeparators = getResources().getString(R.string.sentence_separators);
@@ -197,6 +200,7 @@ public class LatinIME extends InputMethodService
     
     @Override public void onDestroy() {
         mUserDictionary.close();
+        mContactsDictionary.close();
         unregisterReceiver(mReceiver);
         super.onDestroy();
     }

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

@@ -43,6 +43,8 @@ public class Suggest implements Dictionary.WordCallback {
 
     private Dictionary mAutoDictionary;
 
+    private Dictionary mContactsDictionary;
+
     private int mPrefMaxSuggestions = 12;
 
     private int[] mPriorities = new int[mPrefMaxSuggestions];
@@ -82,6 +84,13 @@ public class Suggest implements Dictionary.WordCallback {
         mUserDictionary = userDictionary;
     }
 
+    /**
+     * Sets an optional contacts dictionary resource to be loaded.
+     */
+    public void setContactsDictionary(Dictionary userDictionary) {
+        mContactsDictionary = userDictionary;
+    }
+    
     public void setAutoDictionary(Dictionary autoDictionary) {
         mAutoDictionary = autoDictionary;
     }
@@ -110,8 +119,8 @@ public class Suggest implements Dictionary.WordCallback {
         if (len <= 2) return true;
         int matching = 0;
         for (int i = 0; i < len; i++) {
-            if (UserDictionary.toLowerCase(original.charAt(i)) 
-                    == UserDictionary.toLowerCase(suggestion.charAt(i))) {
+            if (ExpandableDictionary.toLowerCase(original.charAt(i)) 
+                    == ExpandableDictionary.toLowerCase(suggestion.charAt(i))) {
                 matching++;
             }
         }
@@ -148,8 +157,14 @@ public class Suggest implements Dictionary.WordCallback {
         }
         // Search the dictionary only if there are at least 2 characters
         if (wordComposer.size() > 1) {
+            if (mUserDictionary != null || mContactsDictionary != null) {
                 if (mUserDictionary != null) {
                     mUserDictionary.getWords(wordComposer, this);
+                }
+                if (mContactsDictionary != null) {
+                    mContactsDictionary.getWords(wordComposer, this);
+                }
+
                 if (mSuggestions.size() > 0 && isValidWord(mOriginalWord)) {
                     mHaveCorrection = true;
                 }
@@ -263,7 +278,8 @@ public class Suggest implements Dictionary.WordCallback {
         return (mCorrectionMode == CORRECTION_FULL && mMainDict.isValidWord(word)) 
                 || (mCorrectionMode > CORRECTION_NONE && 
                     ((mUserDictionary != null && mUserDictionary.isValidWord(word)))
-                     || (mAutoDictionary != null && mAutoDictionary.isValidWord(word)));
+                     || (mAutoDictionary != null && mAutoDictionary.isValidWord(word))
+                     || (mContactsDictionary != null && mContactsDictionary.isValidWord(word)));
     }
     
     private void collectGarbage() {