115 lines
4.3 KiB
Java
115 lines
4.3 KiB
Java
/*
|
|
* Copyright (C) 2014 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.content.ContentResolver;
|
|
import android.content.Context;
|
|
import android.database.ContentObserver;
|
|
import android.os.SystemClock;
|
|
import android.provider.ContactsContract.Contacts;
|
|
import android.util.Log;
|
|
|
|
import com.android.inputmethod.latin.ContactsManager.ContactsChangedListener;
|
|
import com.android.inputmethod.latin.utils.ExecutorUtils;
|
|
|
|
import java.util.ArrayList;
|
|
import java.util.concurrent.atomic.AtomicBoolean;
|
|
|
|
/**
|
|
* A content observer that listens to updates to content provider {@link Contacts#CONTENT_URI}.
|
|
*/
|
|
public class ContactsContentObserver implements Runnable {
|
|
private static final String TAG = ContactsContentObserver.class.getSimpleName();
|
|
private static final boolean DEBUG = false;
|
|
private static AtomicBoolean sRunning = new AtomicBoolean(false);
|
|
|
|
private final Context mContext;
|
|
private final ContactsManager mManager;
|
|
|
|
private ContentObserver mContentObserver;
|
|
private ContactsChangedListener mContactsChangedListener;
|
|
|
|
public ContactsContentObserver(final ContactsManager manager, final Context context) {
|
|
mManager = manager;
|
|
mContext = context;
|
|
}
|
|
|
|
public void registerObserver(final ContactsChangedListener listener) {
|
|
if (DEBUG) {
|
|
Log.d(TAG, "Registered Contacts Content Observer");
|
|
}
|
|
mContactsChangedListener = listener;
|
|
mContentObserver = new ContentObserver(null /* handler */) {
|
|
@Override
|
|
public void onChange(boolean self) {
|
|
// TODO(zivkovic): Schedule a separate task to reset the decoder.
|
|
ExecutorUtils.getBackgroundExecutor().execute(ContactsContentObserver.this);
|
|
}
|
|
};
|
|
final ContentResolver contentResolver = mContext.getContentResolver();
|
|
contentResolver.registerContentObserver(Contacts.CONTENT_URI, true, mContentObserver);
|
|
}
|
|
|
|
@Override
|
|
public void run() {
|
|
if (!sRunning.compareAndSet(false /* expect */, true /* update */)) {
|
|
if (DEBUG) {
|
|
Log.d(TAG, "run() : Already running. Don't waste time checking again.");
|
|
}
|
|
return;
|
|
}
|
|
if (haveContentsChanged()) {
|
|
if (DEBUG) {
|
|
Log.d(TAG, "run() : Contacts have changed. Notifying listeners.");
|
|
}
|
|
mContactsChangedListener.onContactsChange();
|
|
}
|
|
sRunning.set(false);
|
|
}
|
|
|
|
boolean haveContentsChanged() {
|
|
final long startTime = SystemClock.uptimeMillis();
|
|
final int contactCount = mManager.getContactCount();
|
|
if (contactCount > ContactsDictionaryConstants.MAX_CONTACT_COUNT) {
|
|
// If there are too many contacts then return false. In this rare case it is impossible
|
|
// to include all of them anyways and the cost of rebuilding the dictionary is too high.
|
|
// TODO: Sort and check only the MAX_CONTACT_COUNT most recent contacts?
|
|
return false;
|
|
}
|
|
if (contactCount != mManager.getContactCountAtLastRebuild()) {
|
|
if (DEBUG) {
|
|
Log.d(TAG, "Contact count changed: " + mManager.getContactCountAtLastRebuild()
|
|
+ " to " + contactCount);
|
|
}
|
|
return true;
|
|
}
|
|
final ArrayList<String> names = mManager.getValidNames(Contacts.CONTENT_URI);
|
|
if (names.hashCode() != mManager.getHashCodeAtLastRebuild()) {
|
|
return true;
|
|
}
|
|
if (DEBUG) {
|
|
Log.d(TAG, "No contacts changed. (runtime = " + (SystemClock.uptimeMillis() - startTime)
|
|
+ " ms)");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public void unregister() {
|
|
mContext.getContentResolver().unregisterContentObserver(mContentObserver);
|
|
}
|
|
}
|