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      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 
     17 package com.android.systemui.statusbar;
     18 
     19 import android.os.Handler;
     20 import android.os.IBinder;
     21 import android.os.Message;
     22 
     23 import com.android.internal.statusbar.IStatusBar;
     24 import com.android.internal.statusbar.StatusBarIcon;
     25 import com.android.internal.statusbar.StatusBarIconList;
     26 import 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  */
     35 class 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