CommandQueue.java revision 808182dc874e93582da38d013a4a790d6bc08fc9
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 */ 35public 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 mList.removeIcon(index); 169 mCallbacks.removeIcon(mList.getSlot(index), index, viewIndex); 170 break; 171 } 172 break; 173 } 174 case MSG_ADD_NOTIFICATION: { 175 final NotificationQueueEntry ne = (NotificationQueueEntry)msg.obj; 176 mCallbacks.addNotification(ne.key, ne.notification); 177 break; 178 } 179 case MSG_UPDATE_NOTIFICATION: { 180 final NotificationQueueEntry ne = (NotificationQueueEntry)msg.obj; 181 mCallbacks.updateNotification(ne.key, ne.notification); 182 break; 183 } 184 case MSG_REMOVE_NOTIFICATION: { 185 mCallbacks.removeNotification((IBinder)msg.obj); 186 break; 187 } 188 case MSG_DISABLE: 189 mCallbacks.disable(msg.arg1); 190 break; 191 case MSG_SET_VISIBILITY: 192 if (msg.arg1 == OP_EXPAND) { 193 mCallbacks.animateExpand(); 194 } else { 195 mCallbacks.animateCollapse(); 196 } 197 } 198 } 199 } 200} 201 202