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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  * Copyright (C) 2016 Mopria Alliance, Inc.
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.android.bips.ui;
     19 
     20 import android.content.ComponentName;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.ServiceConnection;
     24 import android.os.Bundle;
     25 import android.os.IBinder;
     26 import android.preference.Preference;
     27 import android.preference.PreferenceFragment;
     28 import android.preference.PreferenceScreen;
     29 import android.util.Log;
     30 import android.view.ContextMenu;
     31 import android.view.Menu;
     32 import android.view.MenuItem;
     33 import android.view.View;
     34 import android.widget.AdapterView;
     35 import android.widget.ListView;
     36 
     37 import com.android.bips.BuiltInPrintService;
     38 import com.android.bips.R;
     39 import com.android.bips.discovery.DiscoveredPrinter;
     40 import com.android.bips.discovery.Discovery;
     41 import com.android.bips.discovery.ManualDiscovery;
     42 
     43 /**
     44  * Presents a list of printers and the ability to add a new one
     45  */
     46 public class ManualPrintersFragment extends PreferenceFragment implements ServiceConnection,
     47         Discovery.Listener {
     48     private static final String TAG = ManualPrintersFragment.class.getSimpleName();
     49     private static final boolean DEBUG = false;
     50 
     51     private static final int ORDER_LAST = Integer.MAX_VALUE - 1;
     52 
     53     private BuiltInPrintService mLocalPrint;
     54     private ManualDiscovery mManualDiscovery;
     55     private AddManualPrinterDialog mDialog;
     56 
     57     @Override
     58     public void onCreate(Bundle in) {
     59         if (DEBUG) Log.d(TAG, "onCreate");
     60         super.onCreate(in);
     61 
     62         getContext().bindService(new Intent(getContext(), BuiltInPrintService.class), this,
     63                 Context.BIND_AUTO_CREATE);
     64     }
     65 
     66     @Override
     67     public void onDestroy() {
     68         if (DEBUG) Log.d(TAG, "onDestroy");
     69         if (mManualDiscovery != null) {
     70             mManualDiscovery.stop(this);
     71         }
     72         getContext().unbindService(this);
     73         super.onDestroy();
     74     }
     75 
     76     @Override
     77     public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
     78         if (DEBUG) Log.d(TAG, "onServiceConnected");
     79         mLocalPrint = BuiltInPrintService.getInstance();
     80 
     81         // Set up the UI now that we have a bound service
     82         PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(getActivity());
     83         setPreferenceScreen(screen);
     84 
     85         AddPrinterPreference addPrinterPreference = new AddPrinterPreference();
     86         screen.addPreference(addPrinterPreference);
     87         registerForContextMenu(getView().findViewById(android.R.id.list));
     88 
     89         mManualDiscovery = mLocalPrint.getManualDiscovery();
     90         mManualDiscovery.start(this);
     91 
     92         // Simulate a click on add printer since that is likely what the user came here to do.
     93         addPrinterPreference.onPreferenceClick(addPrinterPreference);
     94     }
     95 
     96     @Override
     97     public void onServiceDisconnected(ComponentName componentName) {
     98         mLocalPrint = null;
     99     }
    100 
    101     @Override
    102     public void onPrinterFound(DiscoveredPrinter printer) {
    103         if (DEBUG) Log.d(TAG, "onPrinterFound: " + printer);
    104         PreferenceScreen screen = getPreferenceScreen();
    105 
    106         // Do not add duplicates
    107         for (int i = 0; i < screen.getPreferenceCount(); i++) {
    108             if (screen.getPreference(i) instanceof ManualPrinterPreference) {
    109                 ManualPrinterPreference preference = (ManualPrinterPreference) screen
    110                         .getPreference(i);
    111                 if (preference.printer.path.equals(printer.path)) {
    112                     // We have it already, proceed
    113                     return;
    114                 }
    115             }
    116         }
    117         screen.addPreference(new ManualPrinterPreference(getContext(), printer));
    118     }
    119 
    120     @Override
    121     public void onPrinterLost(DiscoveredPrinter printer) {
    122         if (DEBUG) Log.d(TAG, "onPrinterLost: " + printer);
    123         PreferenceScreen screen = getPreferenceScreen();
    124         for (int i = 0; i < screen.getPreferenceCount(); i++) {
    125             Preference preference = screen.getPreference(i);
    126             if (preference instanceof ManualPrinterPreference) {
    127                 if (((ManualPrinterPreference) preference).printer.getUri()
    128                         .equals(printer.getUri())) {
    129                     screen.removePreference(preference);
    130                     break;
    131                 }
    132             }
    133         }
    134     }
    135 
    136     @Override
    137     public void onCreateContextMenu(ContextMenu menu, View view,
    138             ContextMenu.ContextMenuInfo menuInfo) {
    139         if (view instanceof ListView) {
    140             int position = ((AdapterView.AdapterContextMenuInfo) menuInfo).position;
    141             Preference preference = getPreferenceScreen().getPreference(position);
    142             if (preference instanceof ManualPrinterPreference) {
    143                 final DiscoveredPrinter printer = ((ManualPrinterPreference) preference).printer;
    144                 menu.setHeaderTitle(printer.name);
    145                 MenuItem forgetItem = menu.add(Menu.NONE, R.string.forget_printer,
    146                         Menu.NONE, R.string.forget_printer);
    147                 forgetItem.setOnMenuItemClickListener(menuItem -> {
    148                     mManualDiscovery.removeManualPrinter(printer);
    149                     return true;
    150                 });
    151             }
    152         }
    153     }
    154 
    155     @Override
    156     public void onDestroyView() {
    157         super.onDestroyView();
    158         if (mDialog != null && mDialog.isShowing()) {
    159             mDialog.dismiss();
    160         }
    161     }
    162 
    163     private static class ManualPrinterPreference extends Preference {
    164         final DiscoveredPrinter printer;
    165 
    166         ManualPrinterPreference(Context context, DiscoveredPrinter printer) {
    167             super(context);
    168             this.printer = printer;
    169             setLayoutResource(R.layout.printer_item);
    170             setTitle(printer.name);
    171             setSummary(printer.path.getHost());
    172             setIcon(R.drawable.ic_printer);
    173         }
    174     }
    175 
    176     private class AddPrinterPreference extends Preference
    177             implements Preference.OnPreferenceClickListener {
    178         AddPrinterPreference() {
    179             super(ManualPrintersFragment.this.getContext());
    180             setTitle(R.string.add_manual_printer);
    181             setIcon(R.drawable.ic_menu_add);
    182             setOrder(ORDER_LAST);
    183             setPersistent(false);
    184             setOnPreferenceClickListener(this);
    185         }
    186 
    187         @Override
    188         public boolean onPreferenceClick(Preference preference) {
    189             if (DEBUG) Log.d(TAG, "onPreferenceClick for addPrinterPreference");
    190             mDialog = new AddManualPrinterDialog(getContext(), mManualDiscovery);
    191             mDialog.show();
    192             return true;
    193         }
    194     }
    195 }