Home | History | Annotate | Download | only in models 
      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.hierarchyviewerlib.models;
     18 
     19 import com.android.ddmlib.IDevice;
     20 import com.android.hierarchyviewerlib.device.DeviceBridge.ViewServerInfo;
     21 import com.android.hierarchyviewerlib.device.Window;
     22 
     23 import java.util.ArrayList;
     24 import java.util.HashMap;
     25 
     26 /**
     27  * This class stores the list of windows for each connected device. It notifies
     28  * listeners of any changes as well as knows which window is currently selected
     29  * in the device selector.
     30  */
     31 public class DeviceSelectionModel {
     32 
     33     private final HashMap<IDevice, DeviceInfo> mDeviceMap = new HashMap<IDevice, DeviceInfo>();
     34 
     35     private final HashMap<IDevice, Integer> mFocusedWindowHashes = new HashMap<IDevice, Integer>();
     36 
     37     private final ArrayList<IDevice> mDeviceList = new ArrayList<IDevice>();
     38 
     39     private final ArrayList<IWindowChangeListener> mWindowChangeListeners =
     40             new ArrayList<IWindowChangeListener>();
     41 
     42     private IDevice mSelectedDevice;
     43 
     44     private Window mSelectedWindow;
     45 
     46     private static DeviceSelectionModel sModel;
     47 
     48     private static class DeviceInfo {
     49         Window[] windows;
     50         ViewServerInfo viewServerInfo;
     51 
     52         private DeviceInfo(Window[] windows, ViewServerInfo viewServerInfo) {
     53             this.windows = windows;
     54             this.viewServerInfo = viewServerInfo;
     55         }
     56     }
     57     public static DeviceSelectionModel getModel() {
     58         if (sModel == null) {
     59             sModel = new DeviceSelectionModel();
     60         }
     61         return sModel;
     62     }
     63 
     64     public boolean containsDevice(IDevice device) {
     65         synchronized (mDeviceMap) {
     66             return mDeviceMap.containsKey(device);
     67         }
     68     }
     69 
     70     public void addDevice(IDevice device, Window[] windows, ViewServerInfo info) {
     71         synchronized (mDeviceMap) {
     72             mDeviceMap.put(device, new DeviceInfo(windows, info));
     73             mDeviceList.add(device);
     74         }
     75         notifyDeviceConnected(device);
     76     }
     77 
     78     public void removeDevice(IDevice device) {
     79         boolean selectionChanged = false;
     80         synchronized (mDeviceMap) {
     81             mDeviceList.remove(device);
     82             if (!mDeviceList.contains(device)) {
     83                 mDeviceMap.remove(device);
     84                 mFocusedWindowHashes.remove(device);
     85                 if (mSelectedDevice == device) {
     86                     mSelectedDevice = null;
     87                     mSelectedWindow = null;
     88                     selectionChanged = true;
     89                 }
     90             }
     91         }
     92         notifyDeviceDisconnected(device);
     93         if (selectionChanged) {
     94             notifySelectionChanged(mSelectedDevice, mSelectedWindow);
     95         }
     96     }
     97 
     98     public void updateDevice(IDevice device, Window[] windows) {
     99         boolean selectionChanged = false;
    100         synchronized (mDeviceMap) {
    101             DeviceInfo oldDeviceInfo = mDeviceMap.get(device);
    102             ViewServerInfo oldViewServerInfo = null;
    103             if (oldDeviceInfo != null) {
    104                 oldViewServerInfo = oldDeviceInfo.viewServerInfo;
    105             }
    106             mDeviceMap.put(device, new DeviceInfo(windows, oldViewServerInfo));
    107             // If the selected window no longer exists, we clear the selection.
    108             if (mSelectedDevice == device && mSelectedWindow != null) {
    109                 boolean windowStillExists = false;
    110                 for (int i = 0; i < windows.length && !windowStillExists; i++) {
    111                     if (windows[i].equals(mSelectedWindow)) {
    112                         windowStillExists = true;
    113                     }
    114                 }
    115                 if (!windowStillExists) {
    116                     mSelectedDevice = null;
    117                     mSelectedWindow = null;
    118                     selectionChanged = true;
    119                 }
    120             }
    121         }
    122         notifyDeviceChanged(device);
    123         if (selectionChanged) {
    124             notifySelectionChanged(mSelectedDevice, mSelectedWindow);
    125         }
    126     }
    127 
    128     /*
    129      * Change which window has focus and notify the listeners.
    130      */
    131     public void updateFocusedWindow(IDevice device, int focusedWindow) {
    132         Integer oldValue = null;
    133         synchronized (mDeviceMap) {
    134             oldValue = mFocusedWindowHashes.put(device, new Integer(focusedWindow));
    135         }
    136         // Only notify if the values are different. It would be cool if Java
    137         // containers accepted basic types like int.
    138         if (oldValue == null || (oldValue != null && oldValue.intValue() != focusedWindow)) {
    139             notifyFocusChanged(device);
    140         }
    141     }
    142 
    143     public static interface IWindowChangeListener {
    144         public void deviceConnected(IDevice device);
    145 
    146         public void deviceChanged(IDevice device);
    147 
    148         public void deviceDisconnected(IDevice device);
    149 
    150         public void focusChanged(IDevice device);
    151 
    152         public void selectionChanged(IDevice device, Window window);
    153     }
    154 
    155     private IWindowChangeListener[] getWindowChangeListenerList() {
    156         IWindowChangeListener[] listeners = null;
    157         synchronized (mWindowChangeListeners) {
    158             if (mWindowChangeListeners.size() == 0) {
    159                 return null;
    160             }
    161             listeners =
    162                     mWindowChangeListeners.toArray(new IWindowChangeListener[mWindowChangeListeners
    163                             .size()]);
    164         }
    165         return listeners;
    166     }
    167 
    168     private void notifyDeviceConnected(IDevice device) {
    169         IWindowChangeListener[] listeners = getWindowChangeListenerList();
    170         if (listeners != null) {
    171             for (int i = 0; i < listeners.length; i++) {
    172                 listeners[i].deviceConnected(device);
    173             }
    174         }
    175     }
    176 
    177     private void notifyDeviceChanged(IDevice device) {
    178         IWindowChangeListener[] listeners = getWindowChangeListenerList();
    179         if (listeners != null) {
    180             for (int i = 0; i < listeners.length; i++) {
    181                 listeners[i].deviceChanged(device);
    182             }
    183         }
    184     }
    185 
    186     private void notifyDeviceDisconnected(IDevice device) {
    187         IWindowChangeListener[] listeners = getWindowChangeListenerList();
    188         if (listeners != null) {
    189             for (int i = 0; i < listeners.length; i++) {
    190                 listeners[i].deviceDisconnected(device);
    191             }
    192         }
    193     }
    194 
    195     private void notifyFocusChanged(IDevice device) {
    196         IWindowChangeListener[] listeners = getWindowChangeListenerList();
    197         if (listeners != null) {
    198             for (int i = 0; i < listeners.length; i++) {
    199                 listeners[i].focusChanged(device);
    200             }
    201         }
    202     }
    203 
    204     private void notifySelectionChanged(IDevice device, Window window) {
    205         IWindowChangeListener[] listeners = getWindowChangeListenerList();
    206         if (listeners != null) {
    207             for (int i = 0; i < listeners.length; i++) {
    208                 listeners[i].selectionChanged(device, window);
    209             }
    210         }
    211     }
    212 
    213     public void addWindowChangeListener(IWindowChangeListener listener) {
    214         synchronized (mWindowChangeListeners) {
    215             mWindowChangeListeners.add(listener);
    216         }
    217     }
    218 
    219     public void removeWindowChangeListener(IWindowChangeListener listener) {
    220         synchronized (mWindowChangeListeners) {
    221             mWindowChangeListeners.remove(listener);
    222         }
    223     }
    224 
    225     public IDevice[] getDevices() {
    226         synchronized (mDeviceMap) {
    227             return mDeviceList.toArray(new IDevice[mDeviceList.size()]);
    228         }
    229     }
    230 
    231     public Window[] getWindows(IDevice device) {
    232         Window[] windows = null;
    233         synchronized (mDeviceMap) {
    234             DeviceInfo info = mDeviceMap.get(device);
    235             if (info != null) {
    236                 windows = mDeviceMap.get(device).windows;
    237             }
    238         }
    239         return windows;
    240     }
    241 
    242     // Returns the window that currently has focus or -1. Note that this means
    243     // that a window with hashcode -1 gets highlighted. If you remember, this is
    244     // the infamous <Focused Window>
    245     public int getFocusedWindow(IDevice device) {
    246         synchronized (mDeviceMap) {
    247             Integer focusedWindow = mFocusedWindowHashes.get(device);
    248             if (focusedWindow == null) {
    249                 return -1;
    250             }
    251             return focusedWindow.intValue();
    252         }
    253     }
    254 
    255     public void setSelection(IDevice device, Window window) {
    256         synchronized (mDeviceMap) {
    257             mSelectedDevice = device;
    258             mSelectedWindow = window;
    259         }
    260         notifySelectionChanged(device, window);
    261     }
    262 
    263     public IDevice getSelectedDevice() {
    264         synchronized (mDeviceMap) {
    265             return mSelectedDevice;
    266         }
    267     }
    268 
    269     public Window getSelectedWindow() {
    270         synchronized (mDeviceMap) {
    271             return mSelectedWindow;
    272         }
    273     }
    274 
    275     public ViewServerInfo getSelectedDeviceInfo() {
    276         synchronized (mDeviceMap) {
    277             ViewServerInfo viewServerInfo = null;
    278             if (mSelectedDevice != null) {
    279                 return mDeviceMap.get(mSelectedDevice).viewServerInfo;
    280             }
    281             return null;
    282         }
    283     }
    284 
    285 }
    286