CommandQueue.java revision 795f2840b4a70bf188c2f24c8c06f73a492b338c 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.systemui.statusbar;
18
19import android.os.Handler;
20import android.os.IBinder;
21import android.os.Message;
22
23import com.android.internal.statusbar.IStatusBar;
24import com.android.internal.statusbar.StatusBarIcon;
25import com.android.internal.statusbar.StatusBarIconList;
26import com.android.internal.statusbar.StatusBarNotification;
27
28/**
29 * This class takes the functions from IStatusBar that come in on
30 * binder pool threads and posts messages to get them onto the main
31 * thread, and calls onto Callbacks.  It also takes care of
32 * coalescing these calls so they don't stack up.  For the calls
33 * are coalesced, note that they are all idempotent.
34 */
35class CommandQueue extends IStatusBar.Stub {
36    private static final String TAG = "StatusBar.CommandQueue";
37
38    private static final int MSG_MASK = 0xffff0000;
39    private static final int INDEX_MASK = 0x0000ffff;
40
41    private static final int MSG_ICON = 0x00010000;
42    private static final int OP_SET_ICON = 1;
43    private static final int OP_REMOVE_ICON = 2;
44
45    private static final int MSG_ADD_NOTIFICATION = 0x00020000;
46    private static final int MSG_UPDATE_NOTIFICATION = 0x00030000;
47    private static final int MSG_REMOVE_NOTIFICATION = 0x00040000;
48
49    private static final int MSG_DISABLE = 0x00050000;
50
51    private static final int MSG_SET_VISIBILITY = 0x00060000;
52    private static final int OP_EXPAND = 1;
53    private static final int OP_COLLAPSE = 2;
54
55    private StatusBarIconList mList;
56    private Callbacks mCallbacks;
57    private Handler mHandler = new H();
58
59    private class NotificationQueueEntry {
60        IBinder key;
61        StatusBarNotification notification;
62    }
63
64    /**
65     * These methods are called back on the main thread.
66     */
67    public interface Callbacks {
68        public void addIcon(String slot, int index, int viewIndex, StatusBarIcon icon);
69        public void updateIcon(String slot, int index, int viewIndex,
70                StatusBarIcon old, StatusBarIcon icon);
71        public void removeIcon(String slot, int index, int viewIndex);
72        public void addNotification(IBinder key, StatusBarNotification notification);
73        public void updateNotification(IBinder key, StatusBarNotification notification);
74        public void removeNotification(IBinder key);
75        public void disable(int state);
76        public void animateExpand();
77        public void animateCollapse();
78    }
79
80    public CommandQueue(Callbacks callbacks, StatusBarIconList list) {
81        mCallbacks = callbacks;
82        mList = list;
83    }
84
85    public void setIcon(int index, StatusBarIcon icon) {
86        synchronized (mList) {
87            int what = MSG_ICON | index;
88            mHandler.removeMessages(what);
89            mHandler.obtainMessage(what, OP_SET_ICON, 0, icon.clone()).sendToTarget();
90        }
91    }
92
93    public void removeIcon(int index) {
94        synchronized (mList) {
95            int what = MSG_ICON | index;
96            mHandler.removeMessages(what);
97            mHandler.obtainMessage(what, OP_REMOVE_ICON, 0, null).sendToTarget();
98        }
99    }
100
101    public void addNotification(IBinder key, StatusBarNotification notification) {
102        synchronized (mList) {
103            NotificationQueueEntry ne = new NotificationQueueEntry();
104            ne.key = key;
105            ne.notification = notification;
106            mHandler.obtainMessage(MSG_ADD_NOTIFICATION, 0, 0, ne).sendToTarget();
107        }
108    }
109
110    public void updateNotification(IBinder key, StatusBarNotification notification) {
111        synchronized (mList) {
112            NotificationQueueEntry ne = new NotificationQueueEntry();
113            ne.key = key;
114            ne.notification = notification;
115            mHandler.obtainMessage(MSG_UPDATE_NOTIFICATION, 0, 0, ne).sendToTarget();
116        }
117    }
118
119    public void removeNotification(IBinder key) {
120        synchronized (mList) {
121            mHandler.obtainMessage(MSG_REMOVE_NOTIFICATION, 0, 0, key).sendToTarget();
122        }
123    }
124
125    public void disable(int state) {
126        synchronized (mList) {
127            mHandler.removeMessages(MSG_DISABLE);
128            mHandler.obtainMessage(MSG_DISABLE, state, 0, null).sendToTarget();
129        }
130    }
131
132    public void animateExpand() {
133        synchronized (mList) {
134            mHandler.removeMessages(MSG_SET_VISIBILITY);
135            mHandler.obtainMessage(MSG_SET_VISIBILITY, OP_EXPAND, 0, null).sendToTarget();
136        }
137    }
138
139    public void animateCollapse() {
140        synchronized (mList) {
141            mHandler.removeMessages(MSG_SET_VISIBILITY);
142            mHandler.obtainMessage(MSG_SET_VISIBILITY, OP_COLLAPSE, 0, null).sendToTarget();
143        }
144    }
145
146    private final class H extends Handler {
147        public void handleMessage(Message msg) {
148            final int what = msg.what & MSG_MASK;
149            switch (what) {
150                case MSG_ICON: {
151                    final int index = msg.what & INDEX_MASK;
152                    final int viewIndex = mList.getViewIndex(index);
153                    switch (msg.arg1) {
154                        case OP_SET_ICON: {
155                            StatusBarIcon icon = (StatusBarIcon)msg.obj;
156                            StatusBarIcon old = mList.getIcon(index);
157                            if (old == null) {
158                                mList.setIcon(index, icon);
159                                mCallbacks.addIcon(mList.getSlot(index), index, viewIndex, icon);
160                            } else {
161                                mList.setIcon(index, icon);
162                                mCallbacks.updateIcon(mList.getSlot(index), index, viewIndex,
163                                        old, icon);
164                            }
165                            break;
166                        }
167                        case OP_REMOVE_ICON:
168                            if (mList.getIcon(index) != null) {
169                                mList.removeIcon(index);
170                                mCallbacks.removeIcon(mList.getSlot(index), index, viewIndex);
171                            }
172                            break;
173                    }
174                    break;
175                }
176                case MSG_ADD_NOTIFICATION: {
177                    final NotificationQueueEntry ne = (NotificationQueueEntry)msg.obj;
178                    mCallbacks.addNotification(ne.key, ne.notification);
179                    break;
180                }
181                case MSG_UPDATE_NOTIFICATION: {
182                    final NotificationQueueEntry ne = (NotificationQueueEntry)msg.obj;
183                    mCallbacks.updateNotification(ne.key, ne.notification);
184                    break;
185                }
186                case MSG_REMOVE_NOTIFICATION: {
187                    mCallbacks.removeNotification((IBinder)msg.obj);
188                    break;
189                }
190                case MSG_DISABLE:
191                    mCallbacks.disable(msg.arg1);
192                    break;
193                case MSG_SET_VISIBILITY:
194                    if (msg.arg1 == OP_EXPAND) {
195                        mCallbacks.animateExpand();
196                    } else {
197                        mCallbacks.animateCollapse();
198                    }
199            }
200        }
201    }
202}
203
204