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ContactsDictionary.java
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ContactsDictionary.java
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/*
* 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.anysoftkeyboard.dictionaries;
import java.util.HashMap;
import java.util.Map.Entry;
import android.annotation.TargetApi;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.provider.ContactsContract.Contacts;
import com.anysoftkeyboard.utils.Log;
import com.menny.android.anysoftkeyboard.AnyApplication;
@TargetApi(5)
public class ContactsDictionary extends UserDictionaryBase {
protected static final String TAG = "ASK CDict";
private static final String[] PROJECTION = { Contacts._ID,
Contacts.DISPLAY_NAME, Contacts.STARRED, Contacts.TIMES_CONTACTED };
private static final int INDEX_NAME = 1;
private static final int INDEX_STARRED = 2;
private static final int INDEX_TIMES = 3;
private ContentObserver mObserver;
private int mContactsCount = 0;
private long mContactsHash = 0;
public ContactsDictionary(Context context) throws Exception {
super("ContactsDictionary", context);
// Perform a managed query. The Activity will handle closing and
// re-querying the cursor
// when needed.
ContentResolver cres = mContext.getContentResolver();
// registering
Log.d(TAG, "Registering to contants changes at " + Contacts.CONTENT_URI);
cres.registerContentObserver(Contacts.CONTENT_URI, true,
mObserver = createContactContectObserver());
}
protected ContentObserver createContactContectObserver() {
return new ContentObserver(null) {
@Override
public void onChange(boolean selfChange) {
Log.d(TAG, "Contacts list modified (self: " + selfChange
+ "). Reloading...");
super.onChange(selfChange);
loadDictionary();
}
@Override
public boolean deliverSelfNotifications() {
return true;
}
};
}
@Override
protected synchronized void loadDictionaryAsync() {
Log.d(TAG, "Starting load of contact names...");
Cursor cursor = null;
try {
// a bit less contacts for memory stress reduction
cursor = mContext.getContentResolver().query(Contacts.CONTENT_URI,
PROJECTION, Contacts.IN_VISIBLE_GROUP + "=?",
new String[] { "1" }, null);
if (cursor != null) {
int newCount = 0;
long newHash = 0;
// first checking if something has changed
if (cursor.moveToFirst()) {
while (!cursor.isAfterLast()) {
String name = cursor.getString(INDEX_NAME);
if (name != null) {
newHash += name.hashCode();
newCount++;
}
cursor.moveToNext();
}
}
Log.d(TAG, "I noticed " + newCount + " contacts.");
if (newCount == mContactsCount && newHash == mContactsHash) {
Log.d(TAG, "No new data in the contacts lists, I'll skip.");
return;
}
Log.d(TAG,
"Contacts will be reloaded since count or hash changed. New count "
+ newCount + " was(" + mContactsCount
+ "), new hash " + newHash + " (was "
+ mContactsHash + ").");
mContactsCount = newCount;
mContactsHash = newHash;
clearDictionary();
int loadedContacts = 0;
final int maxWordLength = MAX_WORD_LENGTH;
HashMap<String, Integer> names = new HashMap<String, Integer>(
mContactsCount);
if (cursor.moveToFirst()) {
while (!cursor.isAfterLast()) {
String name = cursor.getString(INDEX_NAME);
if (name != null) {
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
// Also don't add single letter words,
// possibly confuses
// capitalization of i.
final int wordLen = word.length();
if (wordLen < maxWordLength && wordLen > 1) {
final boolean isStarred = cursor
.getInt(INDEX_STARRED) > 0;
final int timesContacted = cursor
.getInt(INDEX_TIMES);
loadedContacts++;
int freq = 1;
if (isStarred)
freq = 255;// WOW! important!
else if (timesContacted > 100)
freq = 128;
else if (timesContacted > 10)
freq = 32;
else if (timesContacted > 1)
freq = 16;
if (names.containsKey(word)) {
// this word is already in the list
// should we update its freq?
int oldFreq = names.get(word);
// if a name is really popular, then
// it should reflect that
freq += oldFreq;
if (AnyApplication.DEBUG)
Log.d(TAG,
"The contact part "
+ word
+ " get get a better freq (was "
+ oldFreq
+ ", and can be "
+ freq
+ "). Updating.");
names.put(word, freq);
} else {
if (AnyApplication.DEBUG)
Log.d(TAG,
"Contact '"
+ word
+ "' will be added to contacts dictionary with freq "
+ freq);
names.put(word, freq);
}
}
}
}
}
cursor.moveToNext();
}
}
// actually adding the words
for (Entry<String, Integer> wordFreq : names.entrySet()) {
addWordFromStorage(wordFreq.getKey(), wordFreq.getValue());
}
Log.i(TAG, "Loaded " + loadedContacts
+ " words which were made up from your contacts list.");
}
} catch (IllegalStateException e) {
Log.e(TAG, "Contacts DB is having problems");
} finally {
if (cursor != null)
cursor.close();
}
}
@Override
protected synchronized void closeAllResources() {
if (mObserver != null) {
if (AnyApplication.DEBUG)
Log.d(TAG, "Unregisterring from contacts change notifications.");
mContext.getContentResolver().unregisterContentObserver(mObserver);
mObserver = null;
}
}
@Override
protected synchronized void AddWordToStorage(String word, int frequency) {
}
@Override
public synchronized WordsCursor getWordsCursor() {
return null;
}
@Override
public synchronized void deleteWord(String word) {
}
}