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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
* Copyright (C) 2010 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.browser;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.os.Handler;
import android.os.Message;
import android.provider.BrowserContract;
import android.provider.BrowserContract.History;
import android.util.Log;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
public class DataController {
private static final String LOGTAG = "DataController";
// Message IDs
private static final int HISTORY_UPDATE_VISITED = 100;
private static final int HISTORY_UPDATE_TITLE = 101;
public static final int QUERY_URL_IS_BOOKMARK = 200;
private static DataController sInstance;
private Context mContext;
private DataControllerHandler mDataHandler;
private Handler mCbHandler; // To respond on the UI thread
/* package */ static interface OnQueryUrlIsBookmark {
void onQueryUrlIsBookmark(String url, boolean isBookmark);
}
private static class CallbackContainer {
Object replyTo;
Object[] args;
}
private static class DCMessage {
int what;
Object obj;
Object replyTo;
DCMessage(int w, Object o) {
what = w;
obj = o;
}
}
/* package */ static DataController getInstance(Context c) {
if (sInstance == null) {
sInstance = new DataController(c);
}
return sInstance;
}
private DataController(Context c) {
mContext = c.getApplicationContext();
mDataHandler = new DataControllerHandler();
mDataHandler.setDaemon(true);
mDataHandler.start();
mCbHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
CallbackContainer cc = (CallbackContainer) msg.obj;
switch (msg.what) {
case QUERY_URL_IS_BOOKMARK: {
OnQueryUrlIsBookmark cb = (OnQueryUrlIsBookmark) cc.replyTo;
String url = (String) cc.args[0];
boolean isBookmark = (Boolean) cc.args[1];
cb.onQueryUrlIsBookmark(url, isBookmark);
break;
}
}
}
};
}
public void updateVisitedHistory(String url) {
mDataHandler.sendMessage(HISTORY_UPDATE_VISITED, url);
}
public void updateHistoryTitle(String url, String title) {
mDataHandler.sendMessage(HISTORY_UPDATE_TITLE, new String[] { url, title });
}
public void queryBookmarkStatus(String url, OnQueryUrlIsBookmark replyTo) {
if (url == null || url.trim().length() == 0) {
// null or empty url is never a bookmark
replyTo.onQueryUrlIsBookmark(url, false);
return;
}
mDataHandler.sendMessage(QUERY_URL_IS_BOOKMARK, url.trim(), replyTo);
}
// The standard Handler and Message classes don't allow the queue manipulation
// we want (such as peeking). So we use our own queue.
class DataControllerHandler extends Thread {
private BlockingQueue<DCMessage> mMessageQueue
= new LinkedBlockingQueue<DCMessage>();
@Override
public void run() {
super.run();
while (true) {
try {
handleMessage(mMessageQueue.take());
} catch (InterruptedException ex) {
break;
}
}
}
void sendMessage(int what, Object obj) {
DCMessage m = new DCMessage(what, obj);
mMessageQueue.add(m);
}
void sendMessage(int what, Object obj, Object replyTo) {
DCMessage m = new DCMessage(what, obj);
m.replyTo = replyTo;
mMessageQueue.add(m);
}
private void handleMessage(DCMessage msg) {
switch (msg.what) {
case HISTORY_UPDATE_VISITED:
doUpdateVisitedHistory((String) msg.obj);
break;
case HISTORY_UPDATE_TITLE:
String[] args = (String[]) msg.obj;
doUpdateHistoryTitle(args[0], args[1]);
break;
case QUERY_URL_IS_BOOKMARK:
// TODO: Look for identical messages in the queue and remove them
// TODO: Also, look for partial matches and merge them (such as
// multiple callbacks querying the same URL)
doQueryBookmarkStatus((String) msg.obj, msg.replyTo);
break;
}
}
private void doUpdateVisitedHistory(String url) {
ContentResolver cr = mContext.getContentResolver();
Cursor c = null;
try {
c = cr.query(History.CONTENT_URI, new String[] { History._ID, History.VISITS },
History.URL + "=?", new String[] { url }, null);
if (c.moveToFirst()) {
ContentValues values = new ContentValues();
values.put(History.VISITS, c.getInt(1) + 1);
values.put(History.DATE_LAST_VISITED, System.currentTimeMillis());
cr.update(ContentUris.withAppendedId(History.CONTENT_URI, c.getLong(0)),
values, null, null);
} else {
android.provider.Browser.truncateHistory(cr);
ContentValues values = new ContentValues();
values.put(History.URL, url);
values.put(History.VISITS, 1);
values.put(History.DATE_LAST_VISITED, System.currentTimeMillis());
values.put(History.TITLE, url);
values.put(History.DATE_CREATED, 0);
values.put(History.USER_ENTERED, 0);
cr.insert(History.CONTENT_URI, values);
}
} finally {
if (c != null) c.close();
}
}
private void doQueryBookmarkStatus(String url, Object replyTo) {
ContentResolver cr = mContext.getContentResolver();
// Check to see if the site is bookmarked
Cursor cursor = null;
boolean isBookmark = false;
try {
cursor = mContext.getContentResolver().query(
BookmarkUtils.getBookmarksUri(mContext),
new String[] { BrowserContract.Bookmarks.URL },
BrowserContract.Bookmarks.URL + " == ?",
new String[] { url },
null);
isBookmark = cursor.moveToFirst();
} catch (SQLiteException e) {
Log.e(LOGTAG, "Error checking for bookmark: " + e);
} finally {
if (cursor != null) cursor.close();
}
CallbackContainer cc = new CallbackContainer();
cc.replyTo = replyTo;
cc.args = new Object[] { url, isBookmark };
mCbHandler.obtainMessage(QUERY_URL_IS_BOOKMARK, cc).sendToTarget();
}
private void doUpdateHistoryTitle(String url, String title) {
ContentResolver cr = mContext.getContentResolver();
ContentValues values = new ContentValues();
values.put(History.TITLE, title);
cr.update(History.CONTENT_URI, values, History.URL + "=?",
new String[] { url });
}
}
}
|
