src/frontends/android/app/src/main/java/org/strongswan/android/ui/ImcStateFragment.java

   1 /*
   2  * Copyright (C) 2013 Tobias Brunner
   3  * HSR Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 package org.strongswan.android.ui;
  17
  18 import android.app.Service;
  19 import android.content.ComponentName;
  20 import android.content.Context;
  21 import android.content.Intent;
  22 import android.content.ServiceConnection;
  23 import android.os.Bundle;
  24 import android.os.IBinder;
  25 import android.support.v4.app.Fragment;
  26 import android.support.v4.app.FragmentManager;
  27 import android.support.v4.app.FragmentTransaction;
  28 import android.support.v4.content.ContextCompat;
  29 import android.view.GestureDetector;
  30 import android.view.LayoutInflater;
  31 import android.view.MotionEvent;
  32 import android.view.View;
  33 import android.view.View.OnClickListener;
  34 import android.view.View.OnTouchListener;
  35 import android.view.ViewConfiguration;
  36 import android.view.ViewGroup;
  37 import android.widget.LinearLayout;
  38 import android.widget.TextView;
  39
  40 import org.strongswan.android.R;
  41 import org.strongswan.android.logic.VpnStateService;
  42 import org.strongswan.android.logic.VpnStateService.VpnStateListener;
  43 import org.strongswan.android.logic.imc.ImcState;
  44 import org.strongswan.android.logic.imc.RemediationInstruction;
  45
  46 import java.util.ArrayList;
  47
  48 public class ImcStateFragment extends Fragment implements VpnStateListener
  49 {
  50         private int mColorIsolate;
  51         private int mColorBlock;
  52         private boolean mVisible;
  53         private TextView mStateView;
  54         private TextView mAction;
  55         private LinearLayout mButton;
  56         private VpnStateService mService;
  57         private final ServiceConnection mServiceConnection = new ServiceConnection()
  58         {
  59                 @Override
  60                 public void onServiceDisconnected(ComponentName name)
  61                 {
  62                         mService = null;
  63                 }
  64
  65                 @Override
  66                 public void onServiceConnected(ComponentName name, IBinder service)
  67                 {
  68                         mService = ((VpnStateService.LocalBinder)service).getService();
  69                         if (mVisible)
  70                         {
  71                                 mService.registerListener(ImcStateFragment.this);
  72                                 updateView();
  73                         }
  74                 }
  75         };
  76
  77         @Override
  78         public void onCreate(Bundle savedInstanceState)
  79         {
  80                 super.onCreate(savedInstanceState);
  81
  82                 mColorIsolate = ContextCompat.getColor(getActivity(), R.color.warning_text);
  83                 mColorBlock = ContextCompat.getColor(getActivity(), R.color.error_text);
  84
  85                 /* bind to the service only seems to work from the ApplicationContext */
  86                 Context context = getActivity().getApplicationContext();
  87                 context.bindService(new Intent(context, VpnStateService.class),
  88                                                         mServiceConnection, Service.BIND_AUTO_CREATE);
  89                 /* hide it initially */
  90                 getFragmentManager().beginTransaction().hide(this).commit();
  91         }
  92
  93         @Override
  94         public View onCreateView(LayoutInflater inflater, ViewGroup container,
  95                                                          Bundle savedInstanceState)
  96         {
  97                 View view = inflater.inflate(R.layout.imc_state_fragment, container, false);
  98
  99                 mButton = (LinearLayout)view.findViewById(R.id.imc_state_button);
 100                 mButton.setOnClickListener(new OnClickListener()
 101                 {
 102                         @Override
 103                         public void onClick(View v)
 104                         {
 105                                 Intent intent;
 106                                 if (mService != null && !mService.getRemediationInstructions().isEmpty())
 107                                 {
 108                                         intent = new Intent(getActivity(), RemediationInstructionsActivity.class);
 109                                         intent.putParcelableArrayListExtra(RemediationInstructionsFragment.EXTRA_REMEDIATION_INSTRUCTIONS,
 110                                                                                                            new ArrayList<RemediationInstruction>(mService.getRemediationInstructions()));
 111                                 }
 112                                 else
 113                                 {
 114                                         intent = new Intent(getActivity(), LogActivity.class);
 115                                 }
 116                                 startActivity(intent);
 117                         }
 118                 });
 119                 final GestureDetector gestures = new GestureDetector(getActivity(), new GestureDetector.SimpleOnGestureListener()
 120                 {
 121                         /* a better value would be getScaledTouchExplorationTapSlop() but that is hidden */
 122                         private final int mMinDistance = ViewConfiguration.get(getActivity()).getScaledTouchSlop() * 4;
 123
 124                         @Override
 125                         public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
 126                         {
 127                                 if (Math.abs(e1.getX() - e2.getX()) >= mMinDistance)
 128                                 {       /* only if the user swiped a minimum horizontal distance */
 129                                         if (mService != null)
 130                                         {
 131                                                 mService.setImcState(ImcState.UNKNOWN);
 132                                         }
 133                                         return true;
 134                                 }
 135                                 return false;
 136                         }
 137                 });
 138                 mButton.setOnTouchListener(new OnTouchListener()
 139                 {
 140                         @Override
 141                         public boolean onTouch(View v, MotionEvent event)
 142                         {
 143                                 return gestures.onTouchEvent(event);
 144                         }
 145                 });
 146
 147                 mStateView = (TextView)view.findViewById(R.id.imc_state);
 148                 mAction = (TextView)view.findViewById(R.id.action);
 149
 150                 return view;
 151         }
 152
 153         @Override
 154         public void onResume()
 155         {
 156                 super.onResume();
 157                 mVisible = true;
 158                 if (mService != null)
 159                 {
 160                         mService.registerListener(this);
 161                         updateView();
 162                 }
 163         }
 164
 165         @Override
 166         public void onPause()
 167         {
 168                 super.onPause();
 169                 mVisible = false;
 170                 if (mService != null)
 171                 {
 172                         mService.unregisterListener(this);
 173                 }
 174         }
 175
 176         @Override
 177         public void onDestroy()
 178         {
 179                 super.onDestroy();
 180                 if (mService != null)
 181                 {
 182                         getActivity().getApplicationContext().unbindService(mServiceConnection);
 183                 }
 184         }
 185
 186         @Override
 187         public void stateChanged()
 188         {
 189                 updateView();
 190         }
 191
 192         public void updateView()
 193         {
 194                 FragmentManager fm = getFragmentManager();
 195                 if (fm == null)
 196                 {
 197                         return;
 198                 }
 199                 FragmentTransaction ft = fm.beginTransaction();
 200
 201                 switch (mService.getImcState())
 202                 {
 203                         case UNKNOWN:
 204                         case ALLOW:
 205                                 ft.hide(this);
 206                                 break;
 207                         case ISOLATE:
 208                                 mStateView.setText(R.string.imc_state_isolate);
 209                                 mStateView.setTextColor(mColorIsolate);
 210                                 ft.show(this);
 211                                 break;
 212                         case BLOCK:
 213                                 mStateView.setText(R.string.imc_state_block);
 214                                 mStateView.setTextColor(mColorBlock);
 215                                 ft.show(this);
 216                                 break;
 217                 }
 218                 ft.commit();
 219
 220                 mAction.setText(mService.getRemediationInstructions().isEmpty() ? R.string.show_log
 221                                                                                                                                                 : R.string.show_remediation_instructions);
 222         }
 223 }