1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* 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 android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.provider.ContactsContract.Contacts;
public class ContactsDictionary extends ExpandableDictionary {
private static final String[] PROJECTION = {
Contacts._ID,
Contacts.DISPLAY_NAME,
};
private static final int INDEX_NAME = 1;
private ContentObserver mObserver;
private boolean mRequiresReload;
private long mLastLoadedContacts;
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(Contacts.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() {
long now = android.os.SystemClock.uptimeMillis();
if (mLastLoadedContacts == 0
|| now - mLastLoadedContacts > 30 * 60 * 1000 /* 30 minutes */) {
Cursor cursor = getContext().getContentResolver()
.query(Contacts.CONTENT_URI, PROJECTION, null, null, null);
if (cursor != null) {
addWords(cursor);
}
mRequiresReload = false;
mLastLoadedContacts = now;
}
}
@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);
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
if (word.length() < maxWordLength) {
super.addWord(word, 128);
}
}
}
}
cursor.moveToNext();
}
}
cursor.close();
}
}
|
