1package eu.siacs.conversations.ui;
   2
   3import android.annotation.SuppressLint;
   4import android.app.ActionBar;
   5import android.app.AlertDialog;
   6import android.app.FragmentTransaction;
   7import android.app.PendingIntent;
   8import android.content.ActivityNotFoundException;
   9import android.content.ClipData;
  10import android.content.DialogInterface;
  11import android.content.DialogInterface.OnClickListener;
  12import android.content.Intent;
  13import android.content.IntentSender.SendIntentException;
  14import android.content.pm.PackageManager;
  15import android.net.Uri;
  16import android.os.Build;
  17import android.os.Bundle;
  18import android.os.Handler;
  19import android.provider.MediaStore;
  20import android.provider.Settings;
  21import android.support.v4.widget.SlidingPaneLayout;
  22import android.support.v4.widget.SlidingPaneLayout.PanelSlideListener;
  23import android.util.Log;
  24import android.util.Pair;
  25import android.view.Gravity;
  26import android.view.KeyEvent;
  27import android.view.Menu;
  28import android.view.MenuItem;
  29import android.view.Surface;
  30import android.view.View;
  31import android.widget.AdapterView;
  32import android.widget.AdapterView.OnItemClickListener;
  33import android.widget.ArrayAdapter;
  34import android.widget.CheckBox;
  35import android.widget.PopupMenu;
  36import android.widget.PopupMenu.OnMenuItemClickListener;
  37import android.widget.Toast;
  38
  39import net.java.otr4j.session.SessionStatus;
  40
  41import org.openintents.openpgp.util.OpenPgpApi;
  42
  43import java.util.ArrayList;
  44import java.util.Iterator;
  45import java.util.List;
  46import java.util.concurrent.atomic.AtomicBoolean;
  47
  48import de.timroes.android.listview.EnhancedListView;
  49import eu.siacs.conversations.Config;
  50import eu.siacs.conversations.R;
  51import eu.siacs.conversations.crypto.axolotl.AxolotlService;
  52import eu.siacs.conversations.crypto.axolotl.XmppAxolotlSession;
  53import eu.siacs.conversations.entities.Account;
  54import eu.siacs.conversations.entities.Blockable;
  55import eu.siacs.conversations.entities.Contact;
  56import eu.siacs.conversations.entities.Conversation;
  57import eu.siacs.conversations.entities.Message;
  58import eu.siacs.conversations.entities.Transferable;
  59import eu.siacs.conversations.persistance.FileBackend;
  60import eu.siacs.conversations.services.XmppConnectionService;
  61import eu.siacs.conversations.services.XmppConnectionService.OnAccountUpdate;
  62import eu.siacs.conversations.services.XmppConnectionService.OnConversationUpdate;
  63import eu.siacs.conversations.services.XmppConnectionService.OnRosterUpdate;
  64import eu.siacs.conversations.ui.adapter.ConversationAdapter;
  65import eu.siacs.conversations.utils.ExceptionHelper;
  66import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
  67import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  68import eu.siacs.conversations.xmpp.jid.Jid;
  69
  70public class ConversationActivity extends XmppActivity
  71	implements OnAccountUpdate, OnConversationUpdate, OnRosterUpdate, OnUpdateBlocklist, XmppConnectionService.OnShowErrorToast {
  72
  73	public static final String ACTION_VIEW_CONVERSATION = "eu.siacs.conversations.action.VIEW";
  74	public static final String CONVERSATION = "conversationUuid";
  75	public static final String EXTRA_DOWNLOAD_UUID = "eu.siacs.conversations.download_uuid";
  76	public static final String TEXT = "text";
  77	public static final String NICK = "nick";
  78	public static final String PRIVATE_MESSAGE = "pm";
  79
  80	public static final int REQUEST_SEND_MESSAGE = 0x0201;
  81	public static final int REQUEST_DECRYPT_PGP = 0x0202;
  82	public static final int REQUEST_ENCRYPT_MESSAGE = 0x0207;
  83	public static final int REQUEST_TRUST_KEYS_TEXT = 0x0208;
  84	public static final int REQUEST_TRUST_KEYS_MENU = 0x0209;
  85	public static final int REQUEST_START_DOWNLOAD = 0x0210;
  86	public static final int ATTACHMENT_CHOICE_CHOOSE_IMAGE = 0x0301;
  87	public static final int ATTACHMENT_CHOICE_TAKE_PHOTO = 0x0302;
  88	public static final int ATTACHMENT_CHOICE_CHOOSE_FILE = 0x0303;
  89	public static final int ATTACHMENT_CHOICE_RECORD_VOICE = 0x0304;
  90	public static final int ATTACHMENT_CHOICE_LOCATION = 0x0305;
  91	public static final int ATTACHMENT_CHOICE_INVALID = 0x0306;
  92	private static final String STATE_OPEN_CONVERSATION = "state_open_conversation";
  93	private static final String STATE_PANEL_OPEN = "state_panel_open";
  94	private static final String STATE_PENDING_URI = "state_pending_uri";
  95	private static final String STATE_FIRST_VISIBLE = "first_visible";
  96	private static final String STATE_OFFSET_FROM_TOP = "offset_from_top";
  97
  98	private String mOpenConversation = null;
  99	private boolean mPanelOpen = true;
 100	private Pair<Integer,Integer> mScrollPosition = null;
 101	final private List<Uri> mPendingImageUris = new ArrayList<>();
 102	final private List<Uri> mPendingFileUris = new ArrayList<>();
 103	private Uri mPendingGeoUri = null;
 104	private boolean forbidProcessingPendings = false;
 105	private Message mPendingDownloadableMessage = null;
 106
 107	private boolean conversationWasSelectedByKeyboard = false;
 108
 109	private View mContentView;
 110
 111	private List<Conversation> conversationList = new ArrayList<>();
 112	private Conversation swipedConversation = null;
 113	private Conversation mSelectedConversation = null;
 114	private EnhancedListView listView;
 115	private ConversationFragment mConversationFragment;
 116
 117	private ArrayAdapter<Conversation> listAdapter;
 118
 119	private boolean mActivityPaused = false;
 120	private AtomicBoolean mRedirected = new AtomicBoolean(false);
 121	private Pair<Integer, Intent> mPostponedActivityResult;
 122
 123	public Conversation getSelectedConversation() {
 124		return this.mSelectedConversation;
 125	}
 126
 127	public void setSelectedConversation(Conversation conversation) {
 128		this.mSelectedConversation = conversation;
 129	}
 130
 131	public void showConversationsOverview() {
 132		if (mContentView instanceof SlidingPaneLayout) {
 133			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
 134			mSlidingPaneLayout.openPane();
 135		}
 136	}
 137
 138	@Override
 139	protected String getShareableUri() {
 140		Conversation conversation = getSelectedConversation();
 141		if (conversation != null) {
 142			return conversation.getAccount().getShareableUri();
 143		} else {
 144			return "";
 145		}
 146	}
 147
 148	public void hideConversationsOverview() {
 149		if (mContentView instanceof SlidingPaneLayout) {
 150			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
 151			mSlidingPaneLayout.closePane();
 152		}
 153	}
 154
 155	public boolean isConversationsOverviewHideable() {
 156		return mContentView instanceof SlidingPaneLayout;
 157	}
 158
 159	public boolean isConversationsOverviewVisable() {
 160		if (mContentView instanceof SlidingPaneLayout) {
 161			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
 162			return mSlidingPaneLayout.isOpen();
 163		} else {
 164			return true;
 165		}
 166	}
 167
 168	@Override
 169	protected void onCreate(final Bundle savedInstanceState) {
 170		super.onCreate(savedInstanceState);
 171		if (savedInstanceState != null) {
 172			mOpenConversation = savedInstanceState.getString(STATE_OPEN_CONVERSATION, null);
 173			mPanelOpen = savedInstanceState.getBoolean(STATE_PANEL_OPEN, true);
 174			int pos = savedInstanceState.getInt(STATE_FIRST_VISIBLE, -1);
 175			int offset = savedInstanceState.getInt(STATE_OFFSET_FROM_TOP, 1);
 176			if (pos >= 0 && offset <= 0) {
 177				Log.d(Config.LOGTAG,"retrieved scroll position from instanceState "+pos+":"+offset);
 178				mScrollPosition = new Pair<>(pos,offset);
 179			} else {
 180				mScrollPosition = null;
 181			}
 182			String pending = savedInstanceState.getString(STATE_PENDING_URI, null);
 183			if (pending != null) {
 184				Log.d(Config.LOGTAG,"ConversationsActivity.onCreate() - restoring pending image uri");
 185				mPendingImageUris.clear();
 186				mPendingImageUris.add(Uri.parse(pending));
 187			}
 188		}
 189
 190		setContentView(R.layout.fragment_conversations_overview);
 191
 192		this.mConversationFragment = new ConversationFragment();
 193		FragmentTransaction transaction = getFragmentManager().beginTransaction();
 194		transaction.replace(R.id.selected_conversation, this.mConversationFragment, "conversation");
 195		transaction.commit();
 196
 197		listView = (EnhancedListView) findViewById(R.id.list);
 198		this.listAdapter = new ConversationAdapter(this, conversationList);
 199		listView.setAdapter(this.listAdapter);
 200
 201		if (getActionBar() != null) {
 202			getActionBar().setDisplayHomeAsUpEnabled(false);
 203			getActionBar().setHomeButtonEnabled(false);
 204		}
 205
 206		listView.setOnItemClickListener(new OnItemClickListener() {
 207
 208			@Override
 209			public void onItemClick(AdapterView<?> arg0, View clickedView,
 210									int position, long arg3) {
 211				if (getSelectedConversation() != conversationList.get(position)) {
 212					setSelectedConversation(conversationList.get(position));
 213					ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
 214					conversationWasSelectedByKeyboard = false;
 215				}
 216				hideConversationsOverview();
 217				openConversation();
 218			}
 219		});
 220
 221		listView.setDismissCallback(new EnhancedListView.OnDismissCallback() {
 222
 223			@Override
 224			public EnhancedListView.Undoable onDismiss(final EnhancedListView enhancedListView, final int position) {
 225
 226				final int index = listView.getFirstVisiblePosition();
 227				View v = listView.getChildAt(0);
 228				final int top = (v == null) ? 0 : (v.getTop() - listView.getPaddingTop());
 229
 230				try {
 231					swipedConversation = listAdapter.getItem(position);
 232				} catch (IndexOutOfBoundsException e) {
 233					return null;
 234				}
 235				listAdapter.remove(swipedConversation);
 236				xmppConnectionService.markRead(swipedConversation);
 237
 238				final boolean formerlySelected = (getSelectedConversation() == swipedConversation);
 239				if (position == 0 && listAdapter.getCount() == 0) {
 240					endConversation(swipedConversation, false, true);
 241					return null;
 242				} else if (formerlySelected) {
 243					setSelectedConversation(listAdapter.getItem(0));
 244					ConversationActivity.this.mConversationFragment
 245							.reInit(getSelectedConversation());
 246				}
 247
 248				return new EnhancedListView.Undoable() {
 249
 250					@Override
 251					public void undo() {
 252						listAdapter.insert(swipedConversation, position);
 253						if (formerlySelected) {
 254							setSelectedConversation(swipedConversation);
 255							ConversationActivity.this.mConversationFragment
 256									.reInit(getSelectedConversation());
 257						}
 258						swipedConversation = null;
 259						listView.setSelectionFromTop(index + (listView.getChildCount() < position ? 1 : 0), top);
 260					}
 261
 262					@Override
 263					public void discard() {
 264						if (!swipedConversation.isRead()
 265								&& swipedConversation.getMode() == Conversation.MODE_SINGLE) {
 266							swipedConversation = null;
 267							return;
 268						}
 269						endConversation(swipedConversation, false, false);
 270						swipedConversation = null;
 271					}
 272
 273					@Override
 274					public String getTitle() {
 275						if (swipedConversation.getMode() == Conversation.MODE_MULTI) {
 276							return getResources().getString(R.string.title_undo_swipe_out_muc);
 277						} else {
 278							return getResources().getString(R.string.title_undo_swipe_out_conversation);
 279						}
 280					}
 281				};
 282			}
 283		});
 284		listView.enableSwipeToDismiss();
 285		listView.setSwipingLayout(R.id.swipeable_item);
 286		listView.setUndoStyle(EnhancedListView.UndoStyle.SINGLE_POPUP);
 287		listView.setUndoHideDelay(5000);
 288		listView.setRequireTouchBeforeDismiss(false);
 289
 290		mContentView = findViewById(R.id.content_view_spl);
 291		if (mContentView == null) {
 292			mContentView = findViewById(R.id.content_view_ll);
 293		}
 294		if (mContentView instanceof SlidingPaneLayout) {
 295			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
 296			mSlidingPaneLayout.setParallaxDistance(150);
 297			mSlidingPaneLayout
 298					.setShadowResource(R.drawable.es_slidingpane_shadow);
 299			mSlidingPaneLayout.setSliderFadeColor(0);
 300			mSlidingPaneLayout.setPanelSlideListener(new PanelSlideListener() {
 301
 302				@Override
 303				public void onPanelOpened(View arg0) {
 304					updateActionBarTitle();
 305					invalidateOptionsMenu();
 306					hideKeyboard();
 307					if (xmppConnectionServiceBound) {
 308						xmppConnectionService.getNotificationService()
 309								.setOpenConversation(null);
 310					}
 311					closeContextMenu();
 312				}
 313
 314				@Override
 315				public void onPanelClosed(View arg0) {
 316					listView.discardUndo();
 317					openConversation();
 318				}
 319
 320				@Override
 321				public void onPanelSlide(View arg0, float arg1) {
 322					// TODO Auto-generated method stub
 323
 324				}
 325			});
 326		}
 327	}
 328
 329	@Override
 330	public void switchToConversation(Conversation conversation) {
 331		setSelectedConversation(conversation);
 332		runOnUiThread(new Runnable() {
 333			@Override
 334			public void run() {
 335				ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
 336				openConversation();
 337			}
 338		});
 339	}
 340
 341	private void updateActionBarTitle() {
 342		updateActionBarTitle(isConversationsOverviewHideable() && !isConversationsOverviewVisable());
 343	}
 344
 345	private void updateActionBarTitle(boolean titleShouldBeName) {
 346		final ActionBar ab = getActionBar();
 347		final Conversation conversation = getSelectedConversation();
 348		if (ab != null) {
 349			if (titleShouldBeName && conversation != null) {
 350				ab.setDisplayHomeAsUpEnabled(true);
 351				ab.setHomeButtonEnabled(true);
 352				if (conversation.getMode() == Conversation.MODE_SINGLE || useSubjectToIdentifyConference()) {
 353					ab.setTitle(conversation.getName());
 354				} else {
 355					ab.setTitle(conversation.getJid().toBareJid().toString());
 356				}
 357			} else {
 358				ab.setDisplayHomeAsUpEnabled(false);
 359				ab.setHomeButtonEnabled(false);
 360				ab.setTitle(R.string.app_name);
 361			}
 362		}
 363	}
 364
 365	private void openConversation() {
 366		this.updateActionBarTitle();
 367		this.invalidateOptionsMenu();
 368		if (xmppConnectionServiceBound) {
 369			final Conversation conversation = getSelectedConversation();
 370			xmppConnectionService.getNotificationService().setOpenConversation(conversation);
 371			sendReadMarkerIfNecessary(conversation);
 372		}
 373		listAdapter.notifyDataSetChanged();
 374	}
 375
 376	public void sendReadMarkerIfNecessary(final Conversation conversation) {
 377		if (!mActivityPaused && conversation != null) {
 378			xmppConnectionService.sendReadMarker(conversation);
 379		}
 380	}
 381
 382	@Override
 383	public boolean onCreateOptionsMenu(Menu menu) {
 384		getMenuInflater().inflate(R.menu.conversations, menu);
 385		final MenuItem menuSecure = menu.findItem(R.id.action_security);
 386		final MenuItem menuArchive = menu.findItem(R.id.action_archive);
 387		final MenuItem menuMucDetails = menu.findItem(R.id.action_muc_details);
 388		final MenuItem menuContactDetails = menu.findItem(R.id.action_contact_details);
 389		final MenuItem menuAttach = menu.findItem(R.id.action_attach_file);
 390		final MenuItem menuClearHistory = menu.findItem(R.id.action_clear_history);
 391		final MenuItem menuAdd = menu.findItem(R.id.action_add);
 392		final MenuItem menuInviteContact = menu.findItem(R.id.action_invite);
 393		final MenuItem menuMute = menu.findItem(R.id.action_mute);
 394		final MenuItem menuUnmute = menu.findItem(R.id.action_unmute);
 395
 396		if (isConversationsOverviewVisable() && isConversationsOverviewHideable()) {
 397			menuArchive.setVisible(false);
 398			menuMucDetails.setVisible(false);
 399			menuContactDetails.setVisible(false);
 400			menuSecure.setVisible(false);
 401			menuInviteContact.setVisible(false);
 402			menuAttach.setVisible(false);
 403			menuClearHistory.setVisible(false);
 404			menuMute.setVisible(false);
 405			menuUnmute.setVisible(false);
 406		} else {
 407			menuAdd.setVisible(!isConversationsOverviewHideable());
 408			if (this.getSelectedConversation() != null) {
 409				if (this.getSelectedConversation().getNextEncryption() != Message.ENCRYPTION_NONE) {
 410					if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 411						menuSecure.setIcon(R.drawable.ic_lock_white_24dp);
 412					} else {
 413						menuSecure.setIcon(R.drawable.ic_action_secure);
 414					}
 415				}
 416				if (this.getSelectedConversation().getMode() == Conversation.MODE_MULTI) {
 417					menuContactDetails.setVisible(false);
 418					menuAttach.setVisible(getSelectedConversation().getAccount().httpUploadAvailable() && getSelectedConversation().getMucOptions().participating());
 419					menuInviteContact.setVisible(getSelectedConversation().getMucOptions().canInvite());
 420					menuSecure.setVisible((Config.supportOpenPgp() || Config.supportOmemo()) && Config.multipleEncryptionChoices()); //only if pgp is supported we have a choice
 421				} else {
 422					menuContactDetails.setVisible(!this.getSelectedConversation().withSelf());
 423					menuMucDetails.setVisible(false);
 424					menuSecure.setVisible(Config.multipleEncryptionChoices());
 425				}
 426				if (this.getSelectedConversation().isMuted()) {
 427					menuMute.setVisible(false);
 428				} else {
 429					menuUnmute.setVisible(false);
 430				}
 431			}
 432		}
 433		if (Config.supportOmemo()) {
 434			new Handler().post(new Runnable() {
 435				@Override
 436				public void run() {
 437					View view = findViewById(R.id.action_security);
 438					if (view != null) {
 439						view.setOnLongClickListener(new View.OnLongClickListener() {
 440							@Override
 441							public boolean onLongClick(View v) {
 442								return quickOmemoDebugger(getSelectedConversation());
 443							}
 444						});
 445					}
 446				}
 447			});
 448		}
 449		return super.onCreateOptionsMenu(menu);
 450	}
 451
 452	private boolean quickOmemoDebugger(Conversation c) {
 453		if (c != null) {
 454			boolean single = c.getMode() == Conversation.MODE_SINGLE;
 455			AxolotlService axolotlService = c.getAccount().getAxolotlService();
 456			Pair<AxolotlService.AxolotlCapability,Jid> capabilityJidPair = axolotlService.isConversationAxolotlCapableDetailed(c);
 457			switch (capabilityJidPair.first) {
 458				case MISSING_PRESENCE:
 459					Toast.makeText(ConversationActivity.this,single ? getString(R.string.missing_presence_subscription) : getString(R.string.missing_presence_subscription_with_x,capabilityJidPair.second.toBareJid().toString()),Toast.LENGTH_SHORT).show();
 460					return true;
 461				case MISSING_KEYS:
 462					Toast.makeText(ConversationActivity.this,single ? getString(R.string.missing_omemo_keys) : getString(R.string.missing_keys_from_x,capabilityJidPair.second.toBareJid().toString()),Toast.LENGTH_SHORT).show();
 463					return true;
 464				case WRONG_CONFIGURATION:
 465					Toast.makeText(ConversationActivity.this,R.string.wrong_conference_configuration, Toast.LENGTH_SHORT).show();
 466					return true;
 467				case NO_MEMBERS:
 468					Toast.makeText(ConversationActivity.this,R.string.this_conference_has_no_members, Toast.LENGTH_SHORT).show();
 469					return true;
 470			}
 471		}
 472		return false;
 473	}
 474
 475	protected void selectPresenceToAttachFile(final int attachmentChoice, final int encryption) {
 476		final Conversation conversation = getSelectedConversation();
 477		final Account account = conversation.getAccount();
 478		final OnPresenceSelected callback = new OnPresenceSelected() {
 479
 480			@Override
 481			public void onPresenceSelected() {
 482				Intent intent = new Intent();
 483				boolean chooser = false;
 484				String fallbackPackageId = null;
 485				switch (attachmentChoice) {
 486					case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
 487						intent.setAction(Intent.ACTION_GET_CONTENT);
 488						if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
 489							intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
 490						}
 491						intent.setType("image/*");
 492						chooser = true;
 493						break;
 494					case ATTACHMENT_CHOICE_TAKE_PHOTO:
 495						Uri uri = xmppConnectionService.getFileBackend().getTakePhotoUri();
 496						intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 497						intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 498						intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
 499						intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
 500						mPendingImageUris.clear();
 501						mPendingImageUris.add(uri);
 502						break;
 503					case ATTACHMENT_CHOICE_CHOOSE_FILE:
 504						chooser = true;
 505						intent.setType("*/*");
 506						intent.addCategory(Intent.CATEGORY_OPENABLE);
 507						intent.setAction(Intent.ACTION_GET_CONTENT);
 508						break;
 509					case ATTACHMENT_CHOICE_RECORD_VOICE:
 510						intent.setAction(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
 511						fallbackPackageId = "eu.siacs.conversations.voicerecorder";
 512						break;
 513					case ATTACHMENT_CHOICE_LOCATION:
 514						intent.setAction("eu.siacs.conversations.location.request");
 515						fallbackPackageId = "eu.siacs.conversations.sharelocation";
 516						break;
 517				}
 518				if (intent.resolveActivity(getPackageManager()) != null) {
 519					if (chooser) {
 520						startActivityForResult(
 521								Intent.createChooser(intent, getString(R.string.perform_action_with)),
 522								attachmentChoice);
 523					} else {
 524						startActivityForResult(intent, attachmentChoice);
 525					}
 526				} else if (fallbackPackageId != null) {
 527					startActivity(getInstallApkIntent(fallbackPackageId));
 528				}
 529			}
 530		};
 531		if ((account.httpUploadAvailable() || attachmentChoice == ATTACHMENT_CHOICE_LOCATION) && encryption != Message.ENCRYPTION_OTR) {
 532			conversation.setNextCounterpart(null);
 533			callback.onPresenceSelected();
 534		} else {
 535			selectPresence(conversation, callback);
 536		}
 537	}
 538
 539	private Intent getInstallApkIntent(final String packageId) {
 540		Intent intent = new Intent(Intent.ACTION_VIEW);
 541		intent.setData(Uri.parse("market://details?id=" + packageId));
 542		if (intent.resolveActivity(getPackageManager()) != null) {
 543			return intent;
 544		} else {
 545			intent.setData(Uri.parse("http://play.google.com/store/apps/details?id=" + packageId));
 546			return intent;
 547		}
 548	}
 549
 550	public void attachFile(final int attachmentChoice) {
 551		if (attachmentChoice != ATTACHMENT_CHOICE_LOCATION) {
 552			if (!hasStoragePermission(attachmentChoice)) {
 553				return;
 554			}
 555		}
 556		switch (attachmentChoice) {
 557			case ATTACHMENT_CHOICE_LOCATION:
 558				getPreferences().edit().putString("recently_used_quick_action", "location").apply();
 559				break;
 560			case ATTACHMENT_CHOICE_RECORD_VOICE:
 561				getPreferences().edit().putString("recently_used_quick_action", "voice").apply();
 562				break;
 563			case ATTACHMENT_CHOICE_TAKE_PHOTO:
 564				getPreferences().edit().putString("recently_used_quick_action", "photo").apply();
 565				break;
 566			case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
 567				getPreferences().edit().putString("recently_used_quick_action", "picture").apply();
 568				break;
 569		}
 570		final Conversation conversation = getSelectedConversation();
 571		final int encryption = conversation.getNextEncryption();
 572		final int mode = conversation.getMode();
 573		if (encryption == Message.ENCRYPTION_PGP) {
 574			if (hasPgp()) {
 575				if (mode == Conversation.MODE_SINGLE && conversation.getContact().getPgpKeyId() != 0) {
 576					xmppConnectionService.getPgpEngine().hasKey(
 577							conversation.getContact(),
 578							new UiCallback<Contact>() {
 579
 580								@Override
 581								public void userInputRequried(PendingIntent pi, Contact contact) {
 582									ConversationActivity.this.runIntent(pi, attachmentChoice);
 583								}
 584
 585								@Override
 586								public void success(Contact contact) {
 587									selectPresenceToAttachFile(attachmentChoice, encryption);
 588								}
 589
 590								@Override
 591								public void error(int error, Contact contact) {
 592									replaceToast(getString(error));
 593								}
 594							});
 595				} else if (mode == Conversation.MODE_MULTI && conversation.getMucOptions().pgpKeysInUse()) {
 596					if (!conversation.getMucOptions().everybodyHasKeys()) {
 597						Toast warning = Toast
 598								.makeText(this,
 599										R.string.missing_public_keys,
 600										Toast.LENGTH_LONG);
 601						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
 602						warning.show();
 603					}
 604					selectPresenceToAttachFile(attachmentChoice, encryption);
 605				} else {
 606					final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
 607							.findFragmentByTag("conversation");
 608					if (fragment != null) {
 609						fragment.showNoPGPKeyDialog(false,
 610								new OnClickListener() {
 611
 612									@Override
 613									public void onClick(DialogInterface dialog,
 614														int which) {
 615										conversation
 616												.setNextEncryption(Message.ENCRYPTION_NONE);
 617										xmppConnectionService.databaseBackend
 618												.updateConversation(conversation);
 619										selectPresenceToAttachFile(attachmentChoice, Message.ENCRYPTION_NONE);
 620									}
 621								});
 622					}
 623				}
 624			} else {
 625				showInstallPgpDialog();
 626			}
 627		} else {
 628			if (encryption != Message.ENCRYPTION_AXOLOTL || !trustKeysIfNeeded(REQUEST_TRUST_KEYS_MENU, attachmentChoice)) {
 629				selectPresenceToAttachFile(attachmentChoice, encryption);
 630			}
 631		}
 632	}
 633
 634	@Override
 635	public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
 636		if (grantResults.length > 0)
 637			if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
 638				if (requestCode == REQUEST_START_DOWNLOAD) {
 639					if (this.mPendingDownloadableMessage != null) {
 640						startDownloadable(this.mPendingDownloadableMessage);
 641					}
 642				} else {
 643					attachFile(requestCode);
 644				}
 645			} else {
 646				Toast.makeText(this, R.string.no_storage_permission, Toast.LENGTH_SHORT).show();
 647			}
 648	}
 649
 650	public void startDownloadable(Message message) {
 651		if (!hasStoragePermission(ConversationActivity.REQUEST_START_DOWNLOAD)) {
 652			this.mPendingDownloadableMessage = message;
 653			return;
 654		}
 655		Transferable transferable = message.getTransferable();
 656		if (transferable != null) {
 657			if (!transferable.start()) {
 658				Toast.makeText(this, R.string.not_connected_try_again, Toast.LENGTH_SHORT).show();
 659			}
 660		} else if (message.treatAsDownloadable() != Message.Decision.NEVER) {
 661			xmppConnectionService.getHttpConnectionManager().createNewDownloadConnection(message, true);
 662		}
 663	}
 664
 665	@Override
 666	public boolean onOptionsItemSelected(final MenuItem item) {
 667		if (item.getItemId() == android.R.id.home) {
 668			showConversationsOverview();
 669			return true;
 670		} else if (item.getItemId() == R.id.action_add) {
 671			startActivity(new Intent(this, StartConversationActivity.class));
 672			return true;
 673		} else if (getSelectedConversation() != null) {
 674			switch (item.getItemId()) {
 675				case R.id.action_attach_file:
 676					attachFileDialog();
 677					break;
 678				case R.id.action_archive:
 679					this.endConversation(getSelectedConversation());
 680					break;
 681				case R.id.action_contact_details:
 682					switchToContactDetails(getSelectedConversation().getContact());
 683					break;
 684				case R.id.action_muc_details:
 685					Intent intent = new Intent(this,
 686							ConferenceDetailsActivity.class);
 687					intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
 688					intent.putExtra("uuid", getSelectedConversation().getUuid());
 689					startActivity(intent);
 690					break;
 691				case R.id.action_invite:
 692					inviteToConversation(getSelectedConversation());
 693					break;
 694				case R.id.action_security:
 695					selectEncryptionDialog(getSelectedConversation());
 696					break;
 697				case R.id.action_clear_history:
 698					clearHistoryDialog(getSelectedConversation());
 699					break;
 700				case R.id.action_mute:
 701					muteConversationDialog(getSelectedConversation());
 702					break;
 703				case R.id.action_unmute:
 704					unmuteConversation(getSelectedConversation());
 705					break;
 706				case R.id.action_block:
 707					BlockContactDialog.show(this, xmppConnectionService, getSelectedConversation());
 708					break;
 709				case R.id.action_unblock:
 710					BlockContactDialog.show(this, xmppConnectionService, getSelectedConversation());
 711					break;
 712				default:
 713					break;
 714			}
 715			return super.onOptionsItemSelected(item);
 716		} else {
 717			return super.onOptionsItemSelected(item);
 718		}
 719	}
 720
 721	public void endConversation(Conversation conversation) {
 722		endConversation(conversation, true, true);
 723	}
 724
 725	public void endConversation(Conversation conversation, boolean showOverview, boolean reinit) {
 726		if (showOverview) {
 727			showConversationsOverview();
 728		}
 729		xmppConnectionService.archiveConversation(conversation);
 730		if (reinit) {
 731			if (conversationList.size() > 0) {
 732				setSelectedConversation(conversationList.get(0));
 733				this.mConversationFragment.reInit(getSelectedConversation());
 734			} else {
 735				setSelectedConversation(null);
 736				if (mRedirected.compareAndSet(false, true)) {
 737					Intent intent = new Intent(this, StartConversationActivity.class);
 738					intent.putExtra("init", true);
 739					startActivity(intent);
 740					finish();
 741				}
 742			}
 743		}
 744	}
 745
 746	@SuppressLint("InflateParams")
 747	protected void clearHistoryDialog(final Conversation conversation) {
 748		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 749		builder.setTitle(getString(R.string.clear_conversation_history));
 750		View dialogView = getLayoutInflater().inflate(
 751				R.layout.dialog_clear_history, null);
 752		final CheckBox endConversationCheckBox = (CheckBox) dialogView
 753				.findViewById(R.id.end_conversation_checkbox);
 754		builder.setView(dialogView);
 755		builder.setNegativeButton(getString(R.string.cancel), null);
 756		builder.setPositiveButton(getString(R.string.delete_messages),
 757				new OnClickListener() {
 758
 759					@Override
 760					public void onClick(DialogInterface dialog, int which) {
 761						ConversationActivity.this.xmppConnectionService.clearConversationHistory(conversation);
 762						if (endConversationCheckBox.isChecked()) {
 763							endConversation(conversation);
 764						} else {
 765							updateConversationList();
 766							ConversationActivity.this.mConversationFragment.updateMessages();
 767						}
 768					}
 769				});
 770		builder.create().show();
 771	}
 772
 773	protected void attachFileDialog() {
 774		View menuAttachFile = findViewById(R.id.action_attach_file);
 775		if (menuAttachFile == null) {
 776			return;
 777		}
 778		PopupMenu attachFilePopup = new PopupMenu(this, menuAttachFile);
 779		attachFilePopup.inflate(R.menu.attachment_choices);
 780		if (new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION).resolveActivity(getPackageManager()) == null) {
 781			attachFilePopup.getMenu().findItem(R.id.attach_record_voice).setVisible(false);
 782		}
 783		if (new Intent("eu.siacs.conversations.location.request").resolveActivity(getPackageManager()) == null) {
 784			attachFilePopup.getMenu().findItem(R.id.attach_location).setVisible(false);
 785		}
 786		attachFilePopup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
 787
 788			@Override
 789			public boolean onMenuItemClick(MenuItem item) {
 790				switch (item.getItemId()) {
 791					case R.id.attach_choose_picture:
 792						attachFile(ATTACHMENT_CHOICE_CHOOSE_IMAGE);
 793						break;
 794					case R.id.attach_take_picture:
 795						attachFile(ATTACHMENT_CHOICE_TAKE_PHOTO);
 796						break;
 797					case R.id.attach_choose_file:
 798						attachFile(ATTACHMENT_CHOICE_CHOOSE_FILE);
 799						break;
 800					case R.id.attach_record_voice:
 801						attachFile(ATTACHMENT_CHOICE_RECORD_VOICE);
 802						break;
 803					case R.id.attach_location:
 804						attachFile(ATTACHMENT_CHOICE_LOCATION);
 805						break;
 806				}
 807				return false;
 808			}
 809		});
 810		attachFilePopup.show();
 811	}
 812
 813	public void verifyOtrSessionDialog(final Conversation conversation, View view) {
 814		if (!conversation.hasValidOtrSession() || conversation.getOtrSession().getSessionStatus() != SessionStatus.ENCRYPTED) {
 815			Toast.makeText(this, R.string.otr_session_not_started, Toast.LENGTH_LONG).show();
 816			return;
 817		}
 818		if (view == null) {
 819			return;
 820		}
 821		PopupMenu popup = new PopupMenu(this, view);
 822		popup.inflate(R.menu.verification_choices);
 823		popup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
 824			@Override
 825			public boolean onMenuItemClick(MenuItem menuItem) {
 826				Intent intent = new Intent(ConversationActivity.this, VerifyOTRActivity.class);
 827				intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
 828				intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
 829				intent.putExtra(EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
 830				switch (menuItem.getItemId()) {
 831					case R.id.scan_fingerprint:
 832						intent.putExtra("mode", VerifyOTRActivity.MODE_SCAN_FINGERPRINT);
 833						break;
 834					case R.id.ask_question:
 835						intent.putExtra("mode", VerifyOTRActivity.MODE_ASK_QUESTION);
 836						break;
 837					case R.id.manual_verification:
 838						intent.putExtra("mode", VerifyOTRActivity.MODE_MANUAL_VERIFICATION);
 839						break;
 840				}
 841				startActivity(intent);
 842				return true;
 843			}
 844		});
 845		popup.show();
 846	}
 847
 848	protected void selectEncryptionDialog(final Conversation conversation) {
 849		View menuItemView = findViewById(R.id.action_security);
 850		if (menuItemView == null) {
 851			return;
 852		}
 853		PopupMenu popup = new PopupMenu(this, menuItemView);
 854		final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
 855				.findFragmentByTag("conversation");
 856		if (fragment != null) {
 857			popup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
 858
 859				@Override
 860				public boolean onMenuItemClick(MenuItem item) {
 861					switch (item.getItemId()) {
 862						case R.id.encryption_choice_none:
 863							conversation.setNextEncryption(Message.ENCRYPTION_NONE);
 864							item.setChecked(true);
 865							break;
 866						case R.id.encryption_choice_otr:
 867							conversation.setNextEncryption(Message.ENCRYPTION_OTR);
 868							item.setChecked(true);
 869							break;
 870						case R.id.encryption_choice_pgp:
 871							if (hasPgp()) {
 872								if (conversation.getAccount().getPgpSignature() != null) {
 873									conversation.setNextEncryption(Message.ENCRYPTION_PGP);
 874									item.setChecked(true);
 875								} else {
 876									announcePgp(conversation.getAccount(), conversation, onOpenPGPKeyPublished);
 877								}
 878							} else {
 879								showInstallPgpDialog();
 880							}
 881							break;
 882						case R.id.encryption_choice_axolotl:
 883							Log.d(Config.LOGTAG, AxolotlService.getLogprefix(conversation.getAccount())
 884									+ "Enabled axolotl for Contact " + conversation.getContact().getJid());
 885							conversation.setNextEncryption(Message.ENCRYPTION_AXOLOTL);
 886							item.setChecked(true);
 887							break;
 888						default:
 889							conversation.setNextEncryption(Message.ENCRYPTION_NONE);
 890							break;
 891					}
 892					xmppConnectionService.databaseBackend.updateConversation(conversation);
 893					fragment.updateChatMsgHint();
 894					invalidateOptionsMenu();
 895					refreshUi();
 896					return true;
 897				}
 898			});
 899			popup.inflate(R.menu.encryption_choices);
 900			MenuItem otr = popup.getMenu().findItem(R.id.encryption_choice_otr);
 901			MenuItem none = popup.getMenu().findItem(R.id.encryption_choice_none);
 902			MenuItem pgp = popup.getMenu().findItem(R.id.encryption_choice_pgp);
 903			MenuItem axolotl = popup.getMenu().findItem(R.id.encryption_choice_axolotl);
 904			pgp.setVisible(Config.supportOpenPgp());
 905			none.setVisible(Config.supportUnencrypted() || conversation.getMode() == Conversation.MODE_MULTI);
 906			otr.setVisible(Config.supportOtr());
 907			axolotl.setVisible(Config.supportOmemo());
 908			if (conversation.getMode() == Conversation.MODE_MULTI) {
 909				otr.setVisible(false);
 910			}
 911			if (!conversation.getAccount().getAxolotlService().isConversationAxolotlCapable(conversation)) {
 912				axolotl.setEnabled(false);
 913			}
 914			switch (conversation.getNextEncryption()) {
 915				case Message.ENCRYPTION_NONE:
 916					none.setChecked(true);
 917					break;
 918				case Message.ENCRYPTION_OTR:
 919					otr.setChecked(true);
 920					break;
 921				case Message.ENCRYPTION_PGP:
 922					pgp.setChecked(true);
 923					break;
 924				case Message.ENCRYPTION_AXOLOTL:
 925					axolotl.setChecked(true);
 926					break;
 927				default:
 928					none.setChecked(true);
 929					break;
 930			}
 931			popup.show();
 932		}
 933	}
 934
 935	protected void muteConversationDialog(final Conversation conversation) {
 936		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 937		builder.setTitle(R.string.disable_notifications);
 938		final int[] durations = getResources().getIntArray(R.array.mute_options_durations);
 939		builder.setItems(R.array.mute_options_descriptions,
 940				new OnClickListener() {
 941
 942					@Override
 943					public void onClick(final DialogInterface dialog, final int which) {
 944						final long till;
 945						if (durations[which] == -1) {
 946							till = Long.MAX_VALUE;
 947						} else {
 948							till = System.currentTimeMillis() + (durations[which] * 1000);
 949						}
 950						conversation.setMutedTill(till);
 951						ConversationActivity.this.xmppConnectionService.databaseBackend
 952								.updateConversation(conversation);
 953						updateConversationList();
 954						ConversationActivity.this.mConversationFragment.updateMessages();
 955						invalidateOptionsMenu();
 956					}
 957				});
 958		builder.create().show();
 959	}
 960
 961	public void unmuteConversation(final Conversation conversation) {
 962		conversation.setMutedTill(0);
 963		this.xmppConnectionService.databaseBackend.updateConversation(conversation);
 964		updateConversationList();
 965		ConversationActivity.this.mConversationFragment.updateMessages();
 966		invalidateOptionsMenu();
 967	}
 968
 969	@Override
 970	public void onBackPressed() {
 971		if (!isConversationsOverviewVisable()) {
 972			showConversationsOverview();
 973		} else {
 974			moveTaskToBack(true);
 975		}
 976	}
 977
 978	@Override
 979	public boolean onKeyUp(int key, KeyEvent event) {
 980		int rotation = getWindowManager().getDefaultDisplay().getRotation();
 981		final int upKey;
 982		final int downKey;
 983		switch (rotation) {
 984			case Surface.ROTATION_90:
 985				upKey = KeyEvent.KEYCODE_DPAD_LEFT;
 986				downKey = KeyEvent.KEYCODE_DPAD_RIGHT;
 987				break;
 988			case Surface.ROTATION_180:
 989				upKey = KeyEvent.KEYCODE_DPAD_DOWN;
 990				downKey = KeyEvent.KEYCODE_DPAD_UP;
 991				break;
 992			case Surface.ROTATION_270:
 993				upKey = KeyEvent.KEYCODE_DPAD_RIGHT;
 994				downKey = KeyEvent.KEYCODE_DPAD_LEFT;
 995				break;
 996			default:
 997				upKey = KeyEvent.KEYCODE_DPAD_UP;
 998				downKey = KeyEvent.KEYCODE_DPAD_DOWN;
 999		}
1000		final boolean modifier = event.isCtrlPressed() || (event.getMetaState() & KeyEvent.META_ALT_LEFT_ON) != 0;
1001		if (modifier && key == KeyEvent.KEYCODE_TAB && isConversationsOverviewHideable()) {
1002			toggleConversationsOverview();
1003			return true;
1004		} else if (modifier && key == KeyEvent.KEYCODE_SPACE) {
1005			startActivity(new Intent(this, StartConversationActivity.class));
1006			return true;
1007		} else if (modifier && key == downKey) {
1008			if (isConversationsOverviewHideable() && !isConversationsOverviewVisable()) {
1009				showConversationsOverview();
1010				;
1011			}
1012			return selectDownConversation();
1013		} else if (modifier && key == upKey) {
1014			if (isConversationsOverviewHideable() && !isConversationsOverviewVisable()) {
1015				showConversationsOverview();
1016			}
1017			return selectUpConversation();
1018		} else if (modifier && key == KeyEvent.KEYCODE_1) {
1019			return openConversationByIndex(0);
1020		} else if (modifier && key == KeyEvent.KEYCODE_2) {
1021			return openConversationByIndex(1);
1022		} else if (modifier && key == KeyEvent.KEYCODE_3) {
1023			return openConversationByIndex(2);
1024		} else if (modifier && key == KeyEvent.KEYCODE_4) {
1025			return openConversationByIndex(3);
1026		} else if (modifier && key == KeyEvent.KEYCODE_5) {
1027			return openConversationByIndex(4);
1028		} else if (modifier && key == KeyEvent.KEYCODE_6) {
1029			return openConversationByIndex(5);
1030		} else if (modifier && key == KeyEvent.KEYCODE_7) {
1031			return openConversationByIndex(6);
1032		} else if (modifier && key == KeyEvent.KEYCODE_8) {
1033			return openConversationByIndex(7);
1034		} else if (modifier && key == KeyEvent.KEYCODE_9) {
1035			return openConversationByIndex(8);
1036		} else if (modifier && key == KeyEvent.KEYCODE_0) {
1037			return openConversationByIndex(9);
1038		} else {
1039			return super.onKeyUp(key, event);
1040		}
1041	}
1042
1043	private void toggleConversationsOverview() {
1044		if (isConversationsOverviewVisable()) {
1045			hideConversationsOverview();
1046			if (mConversationFragment != null) {
1047				mConversationFragment.setFocusOnInputField();
1048			}
1049		} else {
1050			showConversationsOverview();
1051		}
1052	}
1053
1054	private boolean selectUpConversation() {
1055		if (this.mSelectedConversation != null) {
1056			int index = this.conversationList.indexOf(this.mSelectedConversation);
1057			if (index > 0) {
1058				return openConversationByIndex(index - 1);
1059			}
1060		}
1061		return false;
1062	}
1063
1064	private boolean selectDownConversation() {
1065		if (this.mSelectedConversation != null) {
1066			int index = this.conversationList.indexOf(this.mSelectedConversation);
1067			if (index != -1 && index < this.conversationList.size() - 1) {
1068				return openConversationByIndex(index + 1);
1069			}
1070		}
1071		return false;
1072	}
1073
1074	private boolean openConversationByIndex(int index) {
1075		try {
1076			this.conversationWasSelectedByKeyboard = true;
1077			setSelectedConversation(this.conversationList.get(index));
1078			this.mConversationFragment.reInit(getSelectedConversation());
1079			if (index > listView.getLastVisiblePosition() - 1 || index < listView.getFirstVisiblePosition() + 1) {
1080				this.listView.setSelection(index);
1081			}
1082			openConversation();
1083			return true;
1084		} catch (IndexOutOfBoundsException e) {
1085			return false;
1086		}
1087	}
1088
1089	@Override
1090	protected void onNewIntent(final Intent intent) {
1091		if (intent != null && ACTION_VIEW_CONVERSATION.equals(intent.getAction())) {
1092			mOpenConversation = null;
1093			if (xmppConnectionServiceBound) {
1094				handleViewConversationIntent(intent);
1095				intent.setAction(Intent.ACTION_MAIN);
1096			} else {
1097				setIntent(intent);
1098			}
1099		}
1100	}
1101
1102	@Override
1103	public void onStart() {
1104		super.onStart();
1105		this.mRedirected.set(false);
1106		if (this.xmppConnectionServiceBound) {
1107			this.onBackendConnected();
1108		}
1109		if (conversationList.size() >= 1) {
1110			this.onConversationUpdate();
1111		}
1112	}
1113
1114	@Override
1115	public void onPause() {
1116		listView.discardUndo();
1117		super.onPause();
1118		this.mActivityPaused = true;
1119	}
1120
1121	@Override
1122	public void onResume() {
1123		super.onResume();
1124		final int theme = findTheme();
1125		final boolean usingEnterKey = usingEnterKey();
1126		if (this.mTheme != theme || usingEnterKey != mUsingEnterKey) {
1127			recreate();
1128		}
1129		this.mActivityPaused = false;
1130
1131		if (!isConversationsOverviewVisable() || !isConversationsOverviewHideable()) {
1132			sendReadMarkerIfNecessary(getSelectedConversation());
1133		}
1134
1135	}
1136
1137	@Override
1138	public void onSaveInstanceState(final Bundle savedInstanceState) {
1139		Conversation conversation = getSelectedConversation();
1140		if (conversation != null) {
1141			savedInstanceState.putString(STATE_OPEN_CONVERSATION, conversation.getUuid());
1142			Pair<Integer,Integer> scrollPosition = mConversationFragment.getScrollPosition();
1143			if (scrollPosition != null) {
1144				savedInstanceState.putInt(STATE_FIRST_VISIBLE, scrollPosition.first);
1145				savedInstanceState.putInt(STATE_OFFSET_FROM_TOP, scrollPosition.second);
1146			}
1147		} else {
1148			savedInstanceState.remove(STATE_OPEN_CONVERSATION);
1149		}
1150		savedInstanceState.putBoolean(STATE_PANEL_OPEN, isConversationsOverviewVisable());
1151		if (this.mPendingImageUris.size() >= 1) {
1152			Log.d(Config.LOGTAG,"ConversationsActivity.onSaveInstanceState() - saving pending image uri");
1153			savedInstanceState.putString(STATE_PENDING_URI, this.mPendingImageUris.get(0).toString());
1154		} else {
1155			savedInstanceState.remove(STATE_PENDING_URI);
1156		}
1157		super.onSaveInstanceState(savedInstanceState);
1158	}
1159
1160	private void clearPending() {
1161		mPendingImageUris.clear();
1162		mPendingFileUris.clear();
1163		mPendingGeoUri = null;
1164		mPostponedActivityResult = null;
1165	}
1166
1167	@Override
1168	void onBackendConnected() {
1169		this.xmppConnectionService.getNotificationService().setIsInForeground(true);
1170		updateConversationList();
1171
1172		if (mPendingConferenceInvite != null) {
1173			if (mPendingConferenceInvite.execute(this)) {
1174				mToast = Toast.makeText(this, R.string.creating_conference, Toast.LENGTH_LONG);
1175				mToast.show();
1176			}
1177			mPendingConferenceInvite = null;
1178		}
1179
1180		final Intent intent = getIntent();
1181
1182		if (xmppConnectionService.getAccounts().size() == 0) {
1183			if (mRedirected.compareAndSet(false, true)) {
1184				if (Config.X509_VERIFICATION) {
1185					startActivity(new Intent(this, ManageAccountActivity.class));
1186				} else if (Config.MAGIC_CREATE_DOMAIN != null) {
1187					startActivity(new Intent(this, WelcomeActivity.class));
1188				} else {
1189					Intent editAccount = new Intent(this, EditAccountActivity.class);
1190					editAccount.putExtra("init",true);
1191					startActivity(editAccount);
1192				}
1193				finish();
1194			}
1195		} else if (conversationList.size() <= 0) {
1196			if (mRedirected.compareAndSet(false, true)) {
1197				Account pendingAccount = xmppConnectionService.getPendingAccount();
1198				if (pendingAccount == null) {
1199					Intent startConversationActivity = new Intent(this, StartConversationActivity.class);
1200					intent.putExtra("init", true);
1201					startActivity(startConversationActivity);
1202				} else {
1203					switchToAccount(pendingAccount, true);
1204				}
1205				finish();
1206			}
1207		} else if (selectConversationByUuid(mOpenConversation)) {
1208			if (mPanelOpen) {
1209				showConversationsOverview();
1210			} else {
1211				if (isConversationsOverviewHideable()) {
1212					openConversation();
1213					updateActionBarTitle(true);
1214				}
1215			}
1216			if (this.mConversationFragment.reInit(getSelectedConversation())) {
1217				Log.d(Config.LOGTAG,"setting scroll position on fragment");
1218				this.mConversationFragment.setScrollPosition(mScrollPosition);
1219			}
1220			mOpenConversation = null;
1221		} else if (intent != null && ACTION_VIEW_CONVERSATION.equals(intent.getAction())) {
1222			clearPending();
1223			handleViewConversationIntent(intent);
1224			intent.setAction(Intent.ACTION_MAIN);
1225		} else if (getSelectedConversation() == null) {
1226			showConversationsOverview();
1227			clearPending();
1228			setSelectedConversation(conversationList.get(0));
1229			this.mConversationFragment.reInit(getSelectedConversation());
1230		} else {
1231			this.mConversationFragment.messageListAdapter.updatePreferences();
1232			this.mConversationFragment.messagesView.invalidateViews();
1233			this.mConversationFragment.setupIme();
1234		}
1235
1236		if (this.mPostponedActivityResult != null) {
1237			this.onActivityResult(mPostponedActivityResult.first, RESULT_OK, mPostponedActivityResult.second);
1238		}
1239
1240		final boolean stopping;
1241		if (Build.VERSION.SDK_INT >= 17) {
1242			stopping = isFinishing() || isDestroyed();
1243		} else {
1244			stopping = isFinishing();
1245		}
1246
1247		if (!forbidProcessingPendings) {
1248			for (Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
1249				Uri foo = i.next();
1250				Log.d(Config.LOGTAG,"ConversationsActivity.onBackendConnected() - attaching image to conversations. stopping="+Boolean.toString(stopping));
1251				attachImageToConversation(getSelectedConversation(), foo);
1252			}
1253
1254			for (Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
1255				Log.d(Config.LOGTAG,"ConversationsActivity.onBackendConnected() - attaching file to conversations. stopping="+Boolean.toString(stopping));
1256				attachFileToConversation(getSelectedConversation(), i.next());
1257			}
1258
1259			if (mPendingGeoUri != null) {
1260				attachLocationToConversation(getSelectedConversation(), mPendingGeoUri);
1261				mPendingGeoUri = null;
1262			}
1263		}
1264		forbidProcessingPendings = false;
1265
1266		if (!ExceptionHelper.checkForCrash(this, this.xmppConnectionService)) {
1267			openBatteryOptimizationDialogIfNeeded();
1268		}
1269	}
1270
1271	private void handleViewConversationIntent(final Intent intent) {
1272		final String uuid = intent.getStringExtra(CONVERSATION);
1273		final String downloadUuid = intent.getStringExtra(EXTRA_DOWNLOAD_UUID);
1274		final String text = intent.getStringExtra(TEXT);
1275		final String nick = intent.getStringExtra(NICK);
1276		final boolean pm = intent.getBooleanExtra(PRIVATE_MESSAGE, false);
1277		if (selectConversationByUuid(uuid)) {
1278			this.mConversationFragment.reInit(getSelectedConversation());
1279			if (nick != null) {
1280				if (pm) {
1281					Jid jid = getSelectedConversation().getJid();
1282					try {
1283						Jid next = Jid.fromParts(jid.getLocalpart(), jid.getDomainpart(), nick);
1284						this.mConversationFragment.privateMessageWith(next);
1285					} catch (final InvalidJidException ignored) {
1286						//do nothing
1287					}
1288				} else {
1289					this.mConversationFragment.highlightInConference(nick);
1290				}
1291			} else {
1292				this.mConversationFragment.appendText(text);
1293			}
1294			hideConversationsOverview();
1295			openConversation();
1296			if (mContentView instanceof SlidingPaneLayout) {
1297				updateActionBarTitle(true); //fixes bug where slp isn't properly closed yet
1298			}
1299			if (downloadUuid != null) {
1300				final Message message = mSelectedConversation.findMessageWithFileAndUuid(downloadUuid);
1301				if (message != null) {
1302					startDownloadable(message);
1303				}
1304			}
1305		}
1306	}
1307
1308	private boolean selectConversationByUuid(String uuid) {
1309		if (uuid == null) {
1310			return false;
1311		}
1312		for (Conversation aConversationList : conversationList) {
1313			if (aConversationList.getUuid().equals(uuid)) {
1314				setSelectedConversation(aConversationList);
1315				return true;
1316			}
1317		}
1318		return false;
1319	}
1320
1321	@Override
1322	protected void unregisterListeners() {
1323		super.unregisterListeners();
1324		xmppConnectionService.getNotificationService().setOpenConversation(null);
1325	}
1326
1327	@SuppressLint("NewApi")
1328	private static List<Uri> extractUriFromIntent(final Intent intent) {
1329		List<Uri> uris = new ArrayList<>();
1330		if (intent == null) {
1331			return uris;
1332		}
1333		Uri uri = intent.getData();
1334		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2 && uri == null) {
1335			final ClipData clipData = intent.getClipData();
1336			if (clipData != null) {
1337				for (int i = 0; i < clipData.getItemCount(); ++i) {
1338					uris.add(clipData.getItemAt(i).getUri());
1339				}
1340			}
1341		} else {
1342			uris.add(uri);
1343		}
1344		return uris;
1345	}
1346
1347	@Override
1348	protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
1349		super.onActivityResult(requestCode, resultCode, data);
1350		if (resultCode == RESULT_OK) {
1351			if (requestCode == REQUEST_DECRYPT_PGP) {
1352				mConversationFragment.onActivityResult(requestCode, resultCode, data);
1353			} else if (requestCode == REQUEST_CHOOSE_PGP_ID) {
1354				// the user chose OpenPGP for encryption and selected his key in the PGP provider
1355				if (xmppConnectionServiceBound) {
1356					if (data.getExtras().containsKey(OpenPgpApi.EXTRA_SIGN_KEY_ID)) {
1357						// associate selected PGP keyId with the account
1358						mSelectedConversation.getAccount().setPgpSignId(data.getExtras().getLong(OpenPgpApi.EXTRA_SIGN_KEY_ID));
1359						// we need to announce the key as described in XEP-027
1360						announcePgp(mSelectedConversation.getAccount(), null, onOpenPGPKeyPublished);
1361					} else {
1362						choosePgpSignId(mSelectedConversation.getAccount());
1363					}
1364					this.mPostponedActivityResult = null;
1365				} else {
1366					this.mPostponedActivityResult = new Pair<>(requestCode, data);
1367				}
1368			} else if (requestCode == REQUEST_ANNOUNCE_PGP) {
1369				if (xmppConnectionServiceBound) {
1370					announcePgp(mSelectedConversation.getAccount(), mSelectedConversation, onOpenPGPKeyPublished);
1371					this.mPostponedActivityResult = null;
1372				} else {
1373					this.mPostponedActivityResult = new Pair<>(requestCode, data);
1374				}
1375			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_IMAGE) {
1376				mPendingImageUris.clear();
1377				mPendingImageUris.addAll(extractUriFromIntent(data));
1378				if (xmppConnectionServiceBound) {
1379					for (Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
1380						Log.d(Config.LOGTAG,"ConversationsActivity.onActivityResult() - attaching image to conversations. CHOOSE_IMAGE");
1381						attachImageToConversation(getSelectedConversation(), i.next());
1382					}
1383				}
1384			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_FILE || requestCode == ATTACHMENT_CHOICE_RECORD_VOICE) {
1385				final List<Uri> uris = extractUriFromIntent(data);
1386				final Conversation c = getSelectedConversation();
1387				final OnPresenceSelected callback = new OnPresenceSelected() {
1388					@Override
1389					public void onPresenceSelected() {
1390						mPendingFileUris.clear();
1391						mPendingFileUris.addAll(uris);
1392						if (xmppConnectionServiceBound) {
1393							for (Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
1394								Log.d(Config.LOGTAG,"ConversationsActivity.onActivityResult() - attaching file to conversations. CHOOSE_FILE/RECORD_VOICE");
1395								attachFileToConversation(c, i.next());
1396							}
1397						}
1398					}
1399				};
1400				if (c == null || c.getMode() == Conversation.MODE_MULTI
1401						|| FileBackend.allFilesUnderSize(this, uris, getMaxHttpUploadSize(c))
1402						|| c.getNextEncryption() == Message.ENCRYPTION_OTR) {
1403					callback.onPresenceSelected();
1404				} else {
1405					selectPresence(c, callback);
1406				}
1407			} else if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO) {
1408				if (mPendingImageUris.size() == 1) {
1409					Uri uri = FileBackend.getIndexableTakePhotoUri(mPendingImageUris.get(0));
1410					mPendingImageUris.set(0, uri);
1411					if (xmppConnectionServiceBound) {
1412						Log.d(Config.LOGTAG,"ConversationsActivity.onActivityResult() - attaching image to conversations. TAKE_PHOTO");
1413						attachImageToConversation(getSelectedConversation(), uri);
1414						mPendingImageUris.clear();
1415					}
1416					if (!Config.ONLY_INTERNAL_STORAGE) {
1417						Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
1418						intent.setData(uri);
1419						sendBroadcast(intent);
1420					}
1421				} else {
1422					mPendingImageUris.clear();
1423				}
1424			} else if (requestCode == ATTACHMENT_CHOICE_LOCATION) {
1425				double latitude = data.getDoubleExtra("latitude", 0);
1426				double longitude = data.getDoubleExtra("longitude", 0);
1427				this.mPendingGeoUri = Uri.parse("geo:" + String.valueOf(latitude) + "," + String.valueOf(longitude));
1428				if (xmppConnectionServiceBound) {
1429					attachLocationToConversation(getSelectedConversation(), mPendingGeoUri);
1430					this.mPendingGeoUri = null;
1431				}
1432			} else if (requestCode == REQUEST_TRUST_KEYS_TEXT || requestCode == REQUEST_TRUST_KEYS_MENU) {
1433				this.forbidProcessingPendings = !xmppConnectionServiceBound;
1434				if (xmppConnectionServiceBound) {
1435					mConversationFragment.onActivityResult(requestCode, resultCode, data);
1436					this.mPostponedActivityResult = null;
1437				} else {
1438					this.mPostponedActivityResult = new Pair<>(requestCode, data);
1439				}
1440
1441			}
1442		} else {
1443			mPendingImageUris.clear();
1444			mPendingFileUris.clear();
1445			if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
1446				mConversationFragment.onActivityResult(requestCode, resultCode, data);
1447			}
1448			if (requestCode == REQUEST_BATTERY_OP) {
1449				setNeverAskForBatteryOptimizationsAgain();
1450			}
1451		}
1452	}
1453
1454	private long getMaxHttpUploadSize(Conversation conversation) {
1455		return conversation.getAccount().getXmppConnection().getFeatures().getMaxHttpUploadSize();
1456	}
1457
1458	private void setNeverAskForBatteryOptimizationsAgain() {
1459		getPreferences().edit().putBoolean("show_battery_optimization", false).commit();
1460	}
1461
1462	private void openBatteryOptimizationDialogIfNeeded() {
1463		if (hasAccountWithoutPush()
1464				&& isOptimizingBattery()
1465				&& getPreferences().getBoolean("show_battery_optimization", true)) {
1466			AlertDialog.Builder builder = new AlertDialog.Builder(this);
1467			builder.setTitle(R.string.battery_optimizations_enabled);
1468			builder.setMessage(R.string.battery_optimizations_enabled_dialog);
1469			builder.setPositiveButton(R.string.next, new OnClickListener() {
1470				@Override
1471				public void onClick(DialogInterface dialog, int which) {
1472					Intent intent = new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS);
1473					Uri uri = Uri.parse("package:" + getPackageName());
1474					intent.setData(uri);
1475					try {
1476						startActivityForResult(intent, REQUEST_BATTERY_OP);
1477					} catch (ActivityNotFoundException e) {
1478						Toast.makeText(ConversationActivity.this, R.string.device_does_not_support_battery_op, Toast.LENGTH_SHORT).show();
1479					}
1480				}
1481			});
1482			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
1483				builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
1484					@Override
1485					public void onDismiss(DialogInterface dialog) {
1486						setNeverAskForBatteryOptimizationsAgain();
1487					}
1488				});
1489			}
1490			builder.create().show();
1491		}
1492	}
1493
1494	private boolean hasAccountWithoutPush() {
1495		for(Account account : xmppConnectionService.getAccounts()) {
1496			if (account.getStatus() != Account.State.DISABLED
1497					&& !xmppConnectionService.getPushManagementService().available(account)) {
1498				return true;
1499			}
1500		}
1501		return false;
1502	}
1503
1504	private void attachLocationToConversation(Conversation conversation, Uri uri) {
1505		if (conversation == null) {
1506			return;
1507		}
1508		xmppConnectionService.attachLocationToConversation(conversation,uri, new UiCallback<Message>() {
1509
1510			@Override
1511			public void success(Message message) {
1512				xmppConnectionService.sendMessage(message);
1513			}
1514
1515			@Override
1516			public void error(int errorCode, Message object) {
1517
1518			}
1519
1520			@Override
1521			public void userInputRequried(PendingIntent pi, Message object) {
1522
1523			}
1524		});
1525	}
1526
1527	private void attachFileToConversation(Conversation conversation, Uri uri) {
1528		if (conversation == null) {
1529			return;
1530		}
1531		final Toast prepareFileToast = Toast.makeText(getApplicationContext(),getText(R.string.preparing_file), Toast.LENGTH_LONG);
1532		prepareFileToast.show();
1533		xmppConnectionService.attachFileToConversation(conversation, uri, new UiCallback<Message>() {
1534			@Override
1535			public void success(Message message) {
1536				hidePrepareFileToast(prepareFileToast);
1537				xmppConnectionService.sendMessage(message);
1538			}
1539
1540			@Override
1541			public void error(final int errorCode, Message message) {
1542				hidePrepareFileToast(prepareFileToast);
1543				runOnUiThread(new Runnable() {
1544					@Override
1545					public void run() {
1546						replaceToast(getString(errorCode));
1547					}
1548				});
1549
1550			}
1551
1552			@Override
1553			public void userInputRequried(PendingIntent pi, Message message) {
1554				hidePrepareFileToast(prepareFileToast);
1555			}
1556		});
1557	}
1558
1559	private void attachImageToConversation(Conversation conversation, Uri uri) {
1560		if (conversation == null) {
1561			return;
1562		}
1563		final Toast prepareFileToast = Toast.makeText(getApplicationContext(),getText(R.string.preparing_image), Toast.LENGTH_LONG);
1564		prepareFileToast.show();
1565		xmppConnectionService.attachImageToConversation(conversation, uri,
1566				new UiCallback<Message>() {
1567
1568					@Override
1569					public void userInputRequried(PendingIntent pi, Message object) {
1570						hidePrepareFileToast(prepareFileToast);
1571					}
1572
1573					@Override
1574					public void success(Message message) {
1575						hidePrepareFileToast(prepareFileToast);
1576						xmppConnectionService.sendMessage(message);
1577					}
1578
1579					@Override
1580					public void error(final int error, Message message) {
1581						hidePrepareFileToast(prepareFileToast);
1582						runOnUiThread(new Runnable() {
1583							@Override
1584							public void run() {
1585								replaceToast(getString(error));
1586							}
1587						});
1588					}
1589				});
1590	}
1591
1592	private void hidePrepareFileToast(final Toast prepareFileToast) {
1593		if (prepareFileToast != null) {
1594			runOnUiThread(new Runnable() {
1595
1596				@Override
1597				public void run() {
1598					prepareFileToast.cancel();
1599				}
1600			});
1601		}
1602	}
1603
1604	public void updateConversationList() {
1605		xmppConnectionService
1606			.populateWithOrderedConversations(conversationList);
1607		if (swipedConversation != null) {
1608			if (swipedConversation.isRead()) {
1609				conversationList.remove(swipedConversation);
1610			} else {
1611				listView.discardUndo();
1612			}
1613		}
1614		listAdapter.notifyDataSetChanged();
1615	}
1616
1617	public void runIntent(PendingIntent pi, int requestCode) {
1618		try {
1619			this.startIntentSenderForResult(pi.getIntentSender(), requestCode,
1620					null, 0, 0, 0);
1621		} catch (final SendIntentException ignored) {
1622		}
1623	}
1624
1625	public void encryptTextMessage(Message message) {
1626		xmppConnectionService.getPgpEngine().encrypt(message,
1627				new UiCallback<Message>() {
1628
1629					@Override
1630					public void userInputRequried(PendingIntent pi,Message message) {
1631						ConversationActivity.this.runIntent(pi,ConversationActivity.REQUEST_SEND_MESSAGE);
1632					}
1633
1634					@Override
1635					public void success(Message message) {
1636						message.setEncryption(Message.ENCRYPTION_DECRYPTED);
1637						xmppConnectionService.sendMessage(message);
1638						if (mConversationFragment != null) {
1639							mConversationFragment.messageSent();
1640						}
1641					}
1642
1643					@Override
1644					public void error(final int error, Message message) {
1645						runOnUiThread(new Runnable() {
1646							@Override
1647							public void run() {
1648								Toast.makeText(ConversationActivity.this,
1649										R.string.unable_to_connect_to_keychain,
1650										Toast.LENGTH_SHORT
1651								).show();
1652							}
1653						});
1654					}
1655				});
1656	}
1657
1658	public boolean useSendButtonToIndicateStatus() {
1659		return getPreferences().getBoolean("send_button_status", false);
1660	}
1661
1662	public boolean indicateReceived() {
1663		return getPreferences().getBoolean("indicate_received", false);
1664	}
1665
1666	public boolean useGreenBackground() {
1667		return getPreferences().getBoolean("use_green_background",true);
1668	}
1669
1670	protected boolean trustKeysIfNeeded(int requestCode) {
1671		return trustKeysIfNeeded(requestCode, ATTACHMENT_CHOICE_INVALID);
1672	}
1673
1674	protected boolean trustKeysIfNeeded(int requestCode, int attachmentChoice) {
1675		AxolotlService axolotlService = mSelectedConversation.getAccount().getAxolotlService();
1676		final List<Jid> targets = axolotlService.getCryptoTargets(mSelectedConversation);
1677		boolean hasUnaccepted = !mSelectedConversation.getAcceptedCryptoTargets().containsAll(targets);
1678		boolean hasUndecidedOwn = !axolotlService.getKeysWithTrust(XmppAxolotlSession.Trust.UNDECIDED).isEmpty();
1679		boolean hasUndecidedContacts = !axolotlService.getKeysWithTrust(XmppAxolotlSession.Trust.UNDECIDED, targets).isEmpty();
1680		boolean hasPendingKeys = !axolotlService.findDevicesWithoutSession(mSelectedConversation).isEmpty();
1681		boolean hasNoTrustedKeys = axolotlService.anyTargetHasNoTrustedKeys(targets);
1682		if(hasUndecidedOwn || hasUndecidedContacts || hasPendingKeys || hasNoTrustedKeys || hasUnaccepted) {
1683			axolotlService.createSessionsIfNeeded(mSelectedConversation);
1684			Intent intent = new Intent(getApplicationContext(), TrustKeysActivity.class);
1685			String[] contacts = new String[targets.size()];
1686			for(int i = 0; i < contacts.length; ++i) {
1687				contacts[i] = targets.get(i).toString();
1688			}
1689			intent.putExtra("contacts", contacts);
1690			intent.putExtra(EXTRA_ACCOUNT, mSelectedConversation.getAccount().getJid().toBareJid().toString());
1691			intent.putExtra("choice", attachmentChoice);
1692			intent.putExtra("conversation",mSelectedConversation.getUuid());
1693			startActivityForResult(intent, requestCode);
1694			return true;
1695		} else {
1696			return false;
1697		}
1698	}
1699
1700	@Override
1701	protected void refreshUiReal() {
1702		updateConversationList();
1703		if (conversationList.size() > 0) {
1704			if (!this.mConversationFragment.isAdded()) {
1705				Log.d(Config.LOGTAG,"fragment NOT added to activity. detached="+Boolean.toString(mConversationFragment.isDetached()));
1706			}
1707			ConversationActivity.this.mConversationFragment.updateMessages();
1708			updateActionBarTitle();
1709			invalidateOptionsMenu();
1710		} else {
1711			Log.d(Config.LOGTAG,"not updating conversations fragment because conversations list size was 0");
1712		}
1713	}
1714
1715	@Override
1716	public void onAccountUpdate() {
1717		this.refreshUi();
1718	}
1719
1720	@Override
1721	public void onConversationUpdate() {
1722		this.refreshUi();
1723	}
1724
1725	@Override
1726	public void onRosterUpdate() {
1727		this.refreshUi();
1728	}
1729
1730	@Override
1731	public void OnUpdateBlocklist(Status status) {
1732		this.refreshUi();
1733	}
1734
1735	public void unblockConversation(final Blockable conversation) {
1736		xmppConnectionService.sendUnblockRequest(conversation);
1737	}
1738
1739	public boolean enterIsSend() {
1740		return getPreferences().getBoolean("enter_is_send",false);
1741	}
1742
1743	@Override
1744	public void onShowErrorToast(final int resId) {
1745		runOnUiThread(new Runnable() {
1746			@Override
1747			public void run() {
1748				Toast.makeText(ConversationActivity.this,resId,Toast.LENGTH_SHORT).show();
1749			}
1750		});
1751	}
1752
1753	public boolean highlightSelectedConversations() {
1754		return !isConversationsOverviewHideable() || this.conversationWasSelectedByKeyboard;
1755	}
1756
1757	public void setMessagesLoaded() {
1758		if (mConversationFragment != null) {
1759			mConversationFragment.setMessagesLoaded();
1760			mConversationFragment.updateMessages();
1761		}
1762	}
1763}