ConversationFragment.java

   1package eu.siacs.conversations.ui;
   2
   3import android.app.Activity;
   4import android.app.AlertDialog;
   5import android.app.Fragment;
   6import android.app.PendingIntent;
   7import android.content.ActivityNotFoundException;
   8import android.content.Context;
   9import android.content.DialogInterface;
  10import android.content.Intent;
  11import android.content.IntentSender;
  12import android.content.IntentSender.SendIntentException;
  13import android.os.Bundle;
  14import android.support.annotation.Nullable;
  15import android.text.InputType;
  16import android.view.ContextMenu;
  17import android.view.ContextMenu.ContextMenuInfo;
  18import android.view.Gravity;
  19import android.view.KeyEvent;
  20import android.view.LayoutInflater;
  21import android.view.MenuItem;
  22import android.view.View;
  23import android.view.View.OnClickListener;
  24import android.view.ViewGroup;
  25import android.view.inputmethod.EditorInfo;
  26import android.view.inputmethod.InputMethodManager;
  27import android.widget.AbsListView;
  28import android.widget.AbsListView.OnScrollListener;
  29import android.widget.AdapterView;
  30import android.widget.AdapterView.AdapterContextMenuInfo;
  31import android.widget.ImageButton;
  32import android.widget.ListView;
  33import android.widget.RelativeLayout;
  34import android.widget.TextView;
  35import android.widget.TextView.OnEditorActionListener;
  36import android.widget.Toast;
  37
  38import net.java.otr4j.session.SessionStatus;
  39
  40import java.util.ArrayList;
  41import java.util.Collections;
  42import java.util.List;
  43import java.util.NoSuchElementException;
  44import java.util.concurrent.ConcurrentLinkedQueue;
  45
  46import eu.siacs.conversations.Config;
  47import eu.siacs.conversations.R;
  48import eu.siacs.conversations.crypto.PgpEngine;
  49import eu.siacs.conversations.crypto.axolotl.AxolotlService;
  50import eu.siacs.conversations.entities.Account;
  51import eu.siacs.conversations.entities.Contact;
  52import eu.siacs.conversations.entities.Conversation;
  53import eu.siacs.conversations.entities.DownloadableFile;
  54import eu.siacs.conversations.entities.Message;
  55import eu.siacs.conversations.entities.MucOptions;
  56import eu.siacs.conversations.entities.Presence;
  57import eu.siacs.conversations.entities.Presences;
  58import eu.siacs.conversations.entities.Transferable;
  59import eu.siacs.conversations.entities.TransferablePlaceholder;
  60import eu.siacs.conversations.services.XmppConnectionService;
  61import eu.siacs.conversations.ui.XmppActivity.OnPresenceSelected;
  62import eu.siacs.conversations.ui.XmppActivity.OnValueEdited;
  63import eu.siacs.conversations.ui.adapter.MessageAdapter;
  64import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureClicked;
  65import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureLongClicked;
  66import eu.siacs.conversations.utils.GeoHelper;
  67import eu.siacs.conversations.utils.UIHelper;
  68import eu.siacs.conversations.xmpp.chatstate.ChatState;
  69import eu.siacs.conversations.xmpp.jid.Jid;
  70
  71public class ConversationFragment extends Fragment implements EditMessage.KeyboardListener {
  72
  73	protected Conversation conversation;
  74	private OnClickListener leaveMuc = new OnClickListener() {
  75
  76		@Override
  77		public void onClick(View v) {
  78			activity.endConversation(conversation);
  79		}
  80	};
  81	private OnClickListener joinMuc = new OnClickListener() {
  82
  83		@Override
  84		public void onClick(View v) {
  85			activity.xmppConnectionService.joinMuc(conversation);
  86		}
  87	};
  88	private OnClickListener enterPassword = new OnClickListener() {
  89
  90		@Override
  91		public void onClick(View v) {
  92			MucOptions muc = conversation.getMucOptions();
  93			String password = muc.getPassword();
  94			if (password == null) {
  95				password = "";
  96			}
  97			activity.quickPasswordEdit(password, new OnValueEdited() {
  98
  99				@Override
 100				public void onValueEdited(String value) {
 101					activity.xmppConnectionService.providePasswordForMuc(
 102							conversation, value);
 103				}
 104			});
 105		}
 106	};
 107	protected ListView messagesView;
 108	final protected List<Message> messageList = new ArrayList<>();
 109	protected MessageAdapter messageListAdapter;
 110	private EditMessage mEditMessage;
 111	private ImageButton mSendButton;
 112	private RelativeLayout snackbar;
 113	private TextView snackbarMessage;
 114	private TextView snackbarAction;
 115	private boolean messagesLoaded = true;
 116	private Toast messageLoaderToast;
 117
 118	private OnScrollListener mOnScrollListener = new OnScrollListener() {
 119
 120		@Override
 121		public void onScrollStateChanged(AbsListView view, int scrollState) {
 122			// TODO Auto-generated method stub
 123
 124		}
 125
 126		private int getIndexOf(String uuid, List<Message> messages) {
 127			if (uuid == null) {
 128				return 0;
 129			}
 130			for(int i = 0; i < messages.size(); ++i) {
 131				if (uuid.equals(messages.get(i).getUuid())) {
 132					return i;
 133				} else {
 134					Message next = messages.get(i);
 135					while(next != null && next.wasMergedIntoPrevious()) {
 136						if (uuid.equals(next.getUuid())) {
 137							return i;
 138						}
 139						next = next.next();
 140					}
 141
 142				}
 143			}
 144			return 0;
 145		}
 146
 147		@Override
 148		public void onScroll(AbsListView view, int firstVisibleItem,
 149							 int visibleItemCount, int totalItemCount) {
 150			synchronized (ConversationFragment.this.messageList) {
 151				if (firstVisibleItem < 5 && messagesLoaded && messageList.size() > 0) {
 152					long timestamp = ConversationFragment.this.messageList.get(0).getTimeSent();
 153					messagesLoaded = false;
 154					activity.xmppConnectionService.loadMoreMessages(conversation, timestamp, new XmppConnectionService.OnMoreMessagesLoaded() {
 155						@Override
 156						public void onMoreMessagesLoaded(final int c, Conversation conversation) {
 157							if (ConversationFragment.this.conversation != conversation) {
 158								return;
 159							}
 160							activity.runOnUiThread(new Runnable() {
 161								@Override
 162								public void run() {
 163									final int oldPosition = messagesView.getFirstVisiblePosition();
 164									Message message = messageList.get(oldPosition);
 165									String uuid = message != null ? message.getUuid() : null;
 166									View v = messagesView.getChildAt(0);
 167									final int pxOffset = (v == null) ? 0 : v.getTop();
 168									ConversationFragment.this.conversation.populateWithMessages(ConversationFragment.this.messageList);
 169									updateStatusMessages();
 170									messageListAdapter.notifyDataSetChanged();
 171									int pos = getIndexOf(uuid,messageList);
 172									messagesView.setSelectionFromTop(pos, pxOffset);
 173									messagesLoaded = true;
 174									if (messageLoaderToast != null) {
 175										messageLoaderToast.cancel();
 176									}
 177								}
 178							});
 179						}
 180
 181						@Override
 182						public void informUser(final int resId) {
 183
 184							activity.runOnUiThread(new Runnable() {
 185								@Override
 186								public void run() {
 187									if (messageLoaderToast != null) {
 188										messageLoaderToast.cancel();
 189									}
 190									if (ConversationFragment.this.conversation != conversation) {
 191										return;
 192									}
 193									messageLoaderToast = Toast.makeText(activity, resId, Toast.LENGTH_LONG);
 194									messageLoaderToast.show();
 195								}
 196							});
 197
 198						}
 199					});
 200
 201				}
 202			}
 203		}
 204	};
 205	private final int KEYCHAIN_UNLOCK_NOT_REQUIRED = 0;
 206	private final int KEYCHAIN_UNLOCK_REQUIRED = 1;
 207	private final int KEYCHAIN_UNLOCK_PENDING = 2;
 208	private int keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 209	protected OnClickListener clickToDecryptListener = new OnClickListener() {
 210
 211		@Override
 212		public void onClick(View v) {
 213			if (keychainUnlock == KEYCHAIN_UNLOCK_REQUIRED
 214					&& activity.hasPgp() && !conversation.getAccount().getPgpDecryptionService().isRunning()) {
 215				keychainUnlock = KEYCHAIN_UNLOCK_PENDING;
 216				updateSnackBar(conversation);
 217				Message message = getLastPgpDecryptableMessage();
 218				if (message != null) {
 219					activity.xmppConnectionService.getPgpEngine().decrypt(message, new UiCallback<Message>() {
 220						@Override
 221						public void success(Message object) {
 222							conversation.getAccount().getPgpDecryptionService().onKeychainUnlocked();
 223							keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 224						}
 225
 226						@Override
 227						public void error(int errorCode, Message object) {
 228							keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 229						}
 230
 231						@Override
 232						public void userInputRequried(PendingIntent pi, Message object) {
 233							try {
 234								activity.startIntentSenderForResult(pi.getIntentSender(),
 235										ConversationActivity.REQUEST_DECRYPT_PGP, null, 0, 0, 0);
 236							} catch (SendIntentException e) {
 237								keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 238								updatePgpMessages();
 239							}
 240						}
 241					});
 242				}
 243			} else {
 244				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 245				updatePgpMessages();
 246			}
 247		}
 248	};
 249	protected OnClickListener clickToVerify = new OnClickListener() {
 250
 251		@Override
 252		public void onClick(View v) {
 253			activity.verifyOtrSessionDialog(conversation, v);
 254		}
 255	};
 256	private OnEditorActionListener mEditorActionListener = new OnEditorActionListener() {
 257
 258		@Override
 259		public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
 260			if (actionId == EditorInfo.IME_ACTION_SEND) {
 261				InputMethodManager imm = (InputMethodManager) v.getContext()
 262						.getSystemService(Context.INPUT_METHOD_SERVICE);
 263				if (imm.isFullscreenMode()) {
 264					imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
 265				}
 266				sendMessage();
 267				return true;
 268			} else {
 269				return false;
 270			}
 271		}
 272	};
 273	private OnClickListener mSendButtonListener = new OnClickListener() {
 274
 275		@Override
 276		public void onClick(View v) {
 277			Object tag = v.getTag();
 278			if (tag instanceof SendButtonAction) {
 279				SendButtonAction action = (SendButtonAction) tag;
 280				switch (action) {
 281					case TAKE_PHOTO:
 282						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_TAKE_PHOTO);
 283						break;
 284					case SEND_LOCATION:
 285						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_LOCATION);
 286						break;
 287					case RECORD_VOICE:
 288						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_RECORD_VOICE);
 289						break;
 290					case CHOOSE_PICTURE:
 291						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_CHOOSE_IMAGE);
 292						break;
 293					case CANCEL:
 294						if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
 295							conversation.setNextCounterpart(null);
 296							updateChatMsgHint();
 297							updateSendButton();
 298						}
 299						break;
 300					default:
 301						sendMessage();
 302				}
 303			} else {
 304				sendMessage();
 305			}
 306		}
 307	};
 308	private OnClickListener clickToMuc = new OnClickListener() {
 309
 310		@Override
 311		public void onClick(View v) {
 312			Intent intent = new Intent(getActivity(), ConferenceDetailsActivity.class);
 313			intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
 314			intent.putExtra("uuid", conversation.getUuid());
 315			startActivity(intent);
 316		}
 317	};
 318	private ConversationActivity activity;
 319	private Message selectedMessage;
 320
 321	private void sendMessage() {
 322		final String body = mEditMessage.getText().toString();
 323		if (body.length() == 0 || this.conversation == null) {
 324			return;
 325		}
 326		Message message = new Message(conversation, body, conversation.getNextEncryption());
 327		if (conversation.getMode() == Conversation.MODE_MULTI) {
 328			if (conversation.getNextCounterpart() != null) {
 329				message.setCounterpart(conversation.getNextCounterpart());
 330				message.setType(Message.TYPE_PRIVATE);
 331			}
 332		}
 333		switch (conversation.getNextEncryption()) {
 334			case Message.ENCRYPTION_OTR:
 335				sendOtrMessage(message);
 336				break;
 337			case Message.ENCRYPTION_PGP:
 338				sendPgpMessage(message);
 339				break;
 340			case Message.ENCRYPTION_AXOLOTL:
 341				if(!activity.trustKeysIfNeeded(ConversationActivity.REQUEST_TRUST_KEYS_TEXT)) {
 342					sendAxolotlMessage(message);
 343				}
 344				break;
 345			default:
 346				sendPlainTextMessage(message);
 347		}
 348	}
 349
 350	public void updateChatMsgHint() {
 351		final boolean multi = conversation.getMode() == Conversation.MODE_MULTI;
 352		if (multi && conversation.getNextCounterpart() != null) {
 353			this.mEditMessage.setHint(getString(
 354					R.string.send_private_message_to,
 355					conversation.getNextCounterpart().getResourcepart()));
 356		} else if (multi && !conversation.getMucOptions().participating()) {
 357			this.mEditMessage.setHint(R.string.you_are_not_participating);
 358		} else {
 359			switch (conversation.getNextEncryption()) {
 360				case Message.ENCRYPTION_NONE:
 361					mEditMessage
 362							.setHint(getString(R.string.send_unencrypted_message));
 363					break;
 364				case Message.ENCRYPTION_OTR:
 365					mEditMessage.setHint(getString(R.string.send_otr_message));
 366					break;
 367				case Message.ENCRYPTION_AXOLOTL:
 368					AxolotlService axolotlService = conversation.getAccount().getAxolotlService();
 369					if (axolotlService != null && axolotlService.trustedSessionVerified(conversation)) {
 370						mEditMessage.setHint(getString(R.string.send_omemo_x509_message));
 371					} else {
 372						mEditMessage.setHint(getString(R.string.send_omemo_message));
 373					}
 374					break;
 375				case Message.ENCRYPTION_PGP:
 376					mEditMessage.setHint(getString(R.string.send_pgp_message));
 377					break;
 378				default:
 379					break;
 380			}
 381			getActivity().invalidateOptionsMenu();
 382		}
 383	}
 384
 385	public void setupIme() {
 386		if (activity == null) {
 387			return;
 388		} else if (activity.usingEnterKey() && activity.enterIsSend()) {
 389			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_FLAG_MULTI_LINE));
 390			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
 391		} else if (activity.usingEnterKey()) {
 392			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
 393			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
 394		} else {
 395			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
 396			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE);
 397		}
 398	}
 399
 400	@Override
 401	public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 402		final View view = inflater.inflate(R.layout.fragment_conversation, container, false);
 403		view.setOnClickListener(null);
 404		mEditMessage = (EditMessage) view.findViewById(R.id.textinput);
 405		mEditMessage.setOnClickListener(new OnClickListener() {
 406
 407			@Override
 408			public void onClick(View v) {
 409				if (activity != null) {
 410					activity.hideConversationsOverview();
 411				}
 412			}
 413		});
 414		mEditMessage.setOnEditorActionListener(mEditorActionListener);
 415
 416		mSendButton = (ImageButton) view.findViewById(R.id.textSendButton);
 417		mSendButton.setOnClickListener(this.mSendButtonListener);
 418
 419		snackbar = (RelativeLayout) view.findViewById(R.id.snackbar);
 420		snackbarMessage = (TextView) view.findViewById(R.id.snackbar_message);
 421		snackbarAction = (TextView) view.findViewById(R.id.snackbar_action);
 422
 423		messagesView = (ListView) view.findViewById(R.id.messages_view);
 424		messagesView.setOnScrollListener(mOnScrollListener);
 425		messagesView.setTranscriptMode(ListView.TRANSCRIPT_MODE_NORMAL);
 426		messageListAdapter = new MessageAdapter((ConversationActivity) getActivity(), this.messageList);
 427		messageListAdapter.setOnContactPictureClicked(new OnContactPictureClicked() {
 428
 429			@Override
 430			public void onContactPictureClicked(Message message) {
 431				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 432					if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
 433						if (message.getCounterpart() != null) {
 434							String user = message.getCounterpart().isBareJid() ? message.getCounterpart().toString() : message.getCounterpart().getResourcepart();
 435							if (!message.getConversation().getMucOptions().isUserInRoom(user)) {
 436								Toast.makeText(activity,activity.getString(R.string.user_has_left_conference,user),Toast.LENGTH_SHORT).show();
 437							}
 438							highlightInConference(user);
 439						}
 440					} else {
 441						activity.switchToContactDetails(message.getContact(), message.getAxolotlFingerprint());
 442					}
 443				} else {
 444					Account account = message.getConversation().getAccount();
 445					Intent intent = new Intent(activity, EditAccountActivity.class);
 446					intent.putExtra("jid", account.getJid().toBareJid().toString());
 447					intent.putExtra("fingerprint", message.getAxolotlFingerprint());
 448					startActivity(intent);
 449				}
 450			}
 451		});
 452		messageListAdapter
 453				.setOnContactPictureLongClicked(new OnContactPictureLongClicked() {
 454
 455					@Override
 456					public void onContactPictureLongClicked(Message message) {
 457						if (message.getStatus() <= Message.STATUS_RECEIVED) {
 458							if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
 459								if (message.getCounterpart() != null) {
 460									String user = message.getCounterpart().getResourcepart();
 461									if (user != null) {
 462										if (message.getConversation().getMucOptions().isUserInRoom(user)) {
 463											privateMessageWith(message.getCounterpart());
 464										} else {
 465											Toast.makeText(activity, activity.getString(R.string.user_has_left_conference, user), Toast.LENGTH_SHORT).show();
 466										}
 467									}
 468								}
 469							}
 470						} else {
 471							activity.showQrCode();
 472						}
 473					}
 474				});
 475		messagesView.setAdapter(messageListAdapter);
 476
 477		registerForContextMenu(messagesView);
 478
 479		return view;
 480	}
 481
 482	@Override
 483	public void onCreateContextMenu(ContextMenu menu, View v,
 484									ContextMenuInfo menuInfo) {
 485		synchronized (this.messageList) {
 486			super.onCreateContextMenu(menu, v, menuInfo);
 487			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
 488			this.selectedMessage = this.messageList.get(acmi.position);
 489			populateContextMenu(menu);
 490		}
 491	}
 492
 493	private void populateContextMenu(ContextMenu menu) {
 494		final Message m = this.selectedMessage;
 495		if (m.getType() != Message.TYPE_STATUS) {
 496			activity.getMenuInflater().inflate(R.menu.message_context, menu);
 497			menu.setHeaderTitle(R.string.message_options);
 498			MenuItem copyText = menu.findItem(R.id.copy_text);
 499			MenuItem shareWith = menu.findItem(R.id.share_with);
 500			MenuItem sendAgain = menu.findItem(R.id.send_again);
 501			MenuItem copyUrl = menu.findItem(R.id.copy_url);
 502			MenuItem downloadFile = menu.findItem(R.id.download_file);
 503			MenuItem cancelTransmission = menu.findItem(R.id.cancel_transmission);
 504			if ((m.getType() == Message.TYPE_TEXT || m.getType() == Message.TYPE_PRIVATE)
 505					&& m.getTransferable() == null
 506					&& !GeoHelper.isGeoUri(m.getBody())
 507					&& m.treatAsDownloadable() != Message.Decision.MUST) {
 508				copyText.setVisible(true);
 509			}
 510			if ((m.getType() != Message.TYPE_TEXT
 511					&& m.getType() != Message.TYPE_PRIVATE
 512					&& m.getTransferable() == null)
 513					|| (GeoHelper.isGeoUri(m.getBody()))) {
 514				shareWith.setVisible(true);
 515			}
 516			if (m.getStatus() == Message.STATUS_SEND_FAILED) {
 517				sendAgain.setVisible(true);
 518			}
 519			if (m.hasFileOnRemoteHost()
 520					|| GeoHelper.isGeoUri(m.getBody())
 521					|| m.treatAsDownloadable() == Message.Decision.MUST) {
 522				copyUrl.setVisible(true);
 523			}
 524			if ((m.getType() == Message.TYPE_TEXT && m.getTransferable() == null && m.treatAsDownloadable() != Message.Decision.NEVER)
 525					|| (m.isFileOrImage() && m.getTransferable() instanceof TransferablePlaceholder && m.hasFileOnRemoteHost())){
 526				downloadFile.setVisible(true);
 527				downloadFile.setTitle(activity.getString(R.string.download_x_file,UIHelper.getFileDescriptionString(activity, m)));
 528			}
 529			if ((m.getTransferable() != null && !(m.getTransferable() instanceof TransferablePlaceholder))
 530					|| (m.isFileOrImage() && (m.getStatus() == Message.STATUS_WAITING
 531					|| m.getStatus() == Message.STATUS_OFFERED))) {
 532				cancelTransmission.setVisible(true);
 533			}
 534		}
 535	}
 536
 537	@Override
 538	public boolean onContextItemSelected(MenuItem item) {
 539		switch (item.getItemId()) {
 540			case R.id.share_with:
 541				shareWith(selectedMessage);
 542				return true;
 543			case R.id.copy_text:
 544				copyText(selectedMessage);
 545				return true;
 546			case R.id.send_again:
 547				resendMessage(selectedMessage);
 548				return true;
 549			case R.id.copy_url:
 550				copyUrl(selectedMessage);
 551				return true;
 552			case R.id.download_file:
 553				downloadFile(selectedMessage);
 554				return true;
 555			case R.id.cancel_transmission:
 556				cancelTransmission(selectedMessage);
 557				return true;
 558			default:
 559				return super.onContextItemSelected(item);
 560		}
 561	}
 562
 563	private void shareWith(Message message) {
 564		Intent shareIntent = new Intent();
 565		shareIntent.setAction(Intent.ACTION_SEND);
 566		if (GeoHelper.isGeoUri(message.getBody())) {
 567			shareIntent.putExtra(Intent.EXTRA_TEXT, message.getBody());
 568			shareIntent.setType("text/plain");
 569		} else {
 570			shareIntent.putExtra(Intent.EXTRA_STREAM,
 571					activity.xmppConnectionService.getFileBackend()
 572							.getJingleFileUri(message));
 573			shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 574			String mime = message.getMimeType();
 575			if (mime == null) {
 576				mime = "*/*";
 577			}
 578			shareIntent.setType(mime);
 579		}
 580		try {
 581			activity.startActivity(Intent.createChooser(shareIntent, getText(R.string.share_with)));
 582		} catch (ActivityNotFoundException e) {
 583			//This should happen only on faulty androids because normally chooser is always available
 584			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
 585		}
 586	}
 587
 588	private void copyText(Message message) {
 589		if (activity.copyTextToClipboard(message.getMergedBody(),
 590				R.string.message_text)) {
 591			Toast.makeText(activity, R.string.message_copied_to_clipboard,
 592					Toast.LENGTH_SHORT).show();
 593		}
 594	}
 595
 596	private void resendMessage(Message message) {
 597		if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
 598			DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 599			if (!file.exists()) {
 600				Toast.makeText(activity, R.string.file_deleted, Toast.LENGTH_SHORT).show();
 601				message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
 602				return;
 603			}
 604		}
 605		activity.xmppConnectionService.resendFailedMessages(message);
 606	}
 607
 608	private void copyUrl(Message message) {
 609		final String url;
 610		final int resId;
 611		if (GeoHelper.isGeoUri(message.getBody())) {
 612			resId = R.string.location;
 613			url = message.getBody();
 614		} else if (message.hasFileOnRemoteHost()) {
 615			resId = R.string.file_url;
 616			url = message.getFileParams().url.toString();
 617		} else {
 618			url = message.getBody().trim();
 619			resId = R.string.file_url;
 620		}
 621		if (activity.copyTextToClipboard(url, resId)) {
 622			Toast.makeText(activity, R.string.url_copied_to_clipboard,
 623					Toast.LENGTH_SHORT).show();
 624		}
 625	}
 626
 627	private void downloadFile(Message message) {
 628		activity.xmppConnectionService.getHttpConnectionManager()
 629				.createNewDownloadConnection(message,true);
 630	}
 631
 632	private void cancelTransmission(Message message) {
 633		Transferable transferable = message.getTransferable();
 634		if (transferable != null) {
 635			transferable.cancel();
 636		} else {
 637			activity.xmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
 638		}
 639	}
 640
 641	protected void privateMessageWith(final Jid counterpart) {
 642		this.mEditMessage.setText("");
 643		this.conversation.setNextCounterpart(counterpart);
 644		updateChatMsgHint();
 645		updateSendButton();
 646	}
 647
 648	protected void highlightInConference(String nick) {
 649		String oldString = mEditMessage.getText().toString().trim();
 650		if (oldString.isEmpty() || mEditMessage.getSelectionStart() == 0) {
 651			mEditMessage.getText().insert(0, nick + ": ");
 652		} else {
 653			if (mEditMessage.getText().charAt(
 654					mEditMessage.getSelectionStart() - 1) != ' ') {
 655				nick = " " + nick;
 656			}
 657			mEditMessage.getText().insert(mEditMessage.getSelectionStart(),
 658					nick + " ");
 659		}
 660	}
 661
 662	@Override
 663	public void onStop() {
 664		super.onStop();
 665		if (this.conversation != null) {
 666			final String msg = mEditMessage.getText().toString();
 667			this.conversation.setNextMessage(msg);
 668			updateChatState(this.conversation, msg);
 669		}
 670	}
 671
 672	private void updateChatState(final Conversation conversation, final String msg) {
 673		ChatState state = msg.length() == 0 ? Config.DEFAULT_CHATSTATE : ChatState.PAUSED;
 674		Account.State status = conversation.getAccount().getStatus();
 675		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(state)) {
 676			activity.xmppConnectionService.sendChatState(conversation);
 677		}
 678	}
 679
 680	public void reInit(Conversation conversation) {
 681		if (conversation == null) {
 682			return;
 683		}
 684		this.activity = (ConversationActivity) getActivity();
 685		setupIme();
 686		if (this.conversation != null) {
 687			final String msg = mEditMessage.getText().toString();
 688			this.conversation.setNextMessage(msg);
 689			if (this.conversation != conversation) {
 690				updateChatState(this.conversation, msg);
 691			}
 692			this.conversation.trim();
 693		}
 694
 695		this.keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 696		this.conversation = conversation;
 697		if (this.conversation.getMode() == Conversation.MODE_MULTI) {
 698			this.conversation.setNextCounterpart(null);
 699		}
 700		boolean canWrite = this.conversation.getMode() == Conversation.MODE_SINGLE || this.conversation.getMucOptions().participating();
 701		this.mEditMessage.setEnabled(canWrite);
 702		this.mSendButton.setEnabled(canWrite);
 703		this.mEditMessage.setKeyboardListener(null);
 704		this.mEditMessage.setText("");
 705		this.mEditMessage.append(this.conversation.getNextMessage());
 706		this.mEditMessage.setKeyboardListener(this);
 707		messageListAdapter.updatePreferences();
 708		this.messagesView.setAdapter(messageListAdapter);
 709		updateMessages();
 710		this.messagesLoaded = true;
 711		int size = this.messageList.size();
 712		if (size > 0) {
 713			messagesView.setSelection(size - 1);
 714		}
 715	}
 716
 717	private OnClickListener mUnblockClickListener = new OnClickListener() {
 718		@Override
 719		public void onClick(final View v) {
 720			v.post(new Runnable() {
 721				@Override
 722				public void run() {
 723					v.setVisibility(View.INVISIBLE);
 724				}
 725			});
 726			if (conversation.isDomainBlocked()) {
 727				BlockContactDialog.show(activity, activity.xmppConnectionService, conversation);
 728			} else {
 729				activity.unblockConversation(conversation);
 730			}
 731		}
 732	};
 733
 734	private OnClickListener mAddBackClickListener = new OnClickListener() {
 735
 736		@Override
 737		public void onClick(View v) {
 738			final Contact contact = conversation == null ? null : conversation.getContact();
 739			if (contact != null) {
 740				activity.xmppConnectionService.createContact(contact);
 741				activity.switchToContactDetails(contact);
 742			}
 743		}
 744	};
 745
 746	private OnClickListener mAnswerSmpClickListener = new OnClickListener() {
 747		@Override
 748		public void onClick(View view) {
 749			Intent intent = new Intent(activity, VerifyOTRActivity.class);
 750			intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
 751			intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
 752			intent.putExtra(VerifyOTRActivity.EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
 753			intent.putExtra("mode", VerifyOTRActivity.MODE_ANSWER_QUESTION);
 754			startActivity(intent);
 755		}
 756	};
 757
 758	private void updateSnackBar(final Conversation conversation) {
 759		final Account account = conversation.getAccount();
 760		final Contact contact = conversation.getContact();
 761		final int mode = conversation.getMode();
 762		if (conversation.isBlocked()) {
 763			showSnackbar(R.string.contact_blocked, R.string.unblock, this.mUnblockClickListener);
 764		} else if (!contact.showInRoster() && contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
 765			showSnackbar(R.string.contact_added_you, R.string.add_back, this.mAddBackClickListener);
 766		} else if (mode == Conversation.MODE_MULTI
 767				&& !conversation.getMucOptions().online()
 768				&& account.getStatus() == Account.State.ONLINE) {
 769			switch (conversation.getMucOptions().getError()) {
 770				case MucOptions.ERROR_NICK_IN_USE:
 771					showSnackbar(R.string.nick_in_use, R.string.edit, clickToMuc);
 772					break;
 773				case MucOptions.ERROR_NO_RESPONSE:
 774					showSnackbar(R.string.conference_not_found, R.string.leave, leaveMuc);
 775					break;
 776				case MucOptions.ERROR_PASSWORD_REQUIRED:
 777					showSnackbar(R.string.conference_requires_password, R.string.enter_password, enterPassword);
 778					break;
 779				case MucOptions.ERROR_BANNED:
 780					showSnackbar(R.string.conference_banned, R.string.leave, leaveMuc);
 781					break;
 782				case MucOptions.ERROR_MEMBERS_ONLY:
 783					showSnackbar(R.string.conference_members_only, R.string.leave, leaveMuc);
 784					break;
 785				case MucOptions.KICKED_FROM_ROOM:
 786					showSnackbar(R.string.conference_kicked, R.string.join, joinMuc);
 787					break;
 788				case MucOptions.ERROR_UNKNOWN:
 789					showSnackbar(R.string.conference_unknown_error, R.string.try_again, joinMuc);
 790					break;
 791				default:
 792					break;
 793			}
 794		} else if (keychainUnlock == KEYCHAIN_UNLOCK_REQUIRED) {
 795			showSnackbar(R.string.openpgp_messages_found, R.string.decrypt, clickToDecryptListener);
 796		} else if (mode == Conversation.MODE_SINGLE
 797				&& conversation.smpRequested()) {
 798			showSnackbar(R.string.smp_requested, R.string.verify, this.mAnswerSmpClickListener);
 799		} else if (mode == Conversation.MODE_SINGLE
 800				&& conversation.hasValidOtrSession()
 801				&& (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED)
 802				&& (!conversation.isOtrFingerprintVerified())) {
 803			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify, clickToVerify);
 804		} else {
 805			hideSnackbar();
 806		}
 807	}
 808
 809	public void updateMessages() {
 810		synchronized (this.messageList) {
 811			if (getView() == null) {
 812				return;
 813			}
 814			final ConversationActivity activity = (ConversationActivity) getActivity();
 815			if (this.conversation != null) {
 816				conversation.populateWithMessages(ConversationFragment.this.messageList);
 817				updatePgpMessages();
 818				updateSnackBar(conversation);
 819				updateStatusMessages();
 820				this.messageListAdapter.notifyDataSetChanged();
 821				updateChatMsgHint();
 822				if (!activity.isConversationsOverviewVisable() || !activity.isConversationsOverviewHideable()) {
 823					activity.sendReadMarkerIfNecessary(conversation);
 824				}
 825				this.updateSendButton();
 826			}
 827		}
 828	}
 829
 830	public void updatePgpMessages() {
 831		if (keychainUnlock != KEYCHAIN_UNLOCK_PENDING) {
 832			if (getLastPgpDecryptableMessage() != null
 833					&& !conversation.getAccount().getPgpDecryptionService().isRunning()) {
 834				keychainUnlock = KEYCHAIN_UNLOCK_REQUIRED;
 835			} else {
 836				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 837			}
 838		}
 839	}
 840
 841	@Nullable
 842	private Message getLastPgpDecryptableMessage() {
 843		for (final Message message : this.messageList) {
 844			if (message.getEncryption() == Message.ENCRYPTION_PGP
 845					&& (message.getStatus() == Message.STATUS_RECEIVED || message.getStatus() >= Message.STATUS_SEND)
 846					&& message.getTransferable() == null) {
 847				return message;
 848			}
 849		}
 850		return null;
 851	}
 852
 853	private void messageSent() {
 854		int size = this.messageList.size();
 855		messagesView.setSelection(size - 1);
 856		mEditMessage.setText("");
 857		updateChatMsgHint();
 858	}
 859
 860	public void setFocusOnInputField() {
 861		mEditMessage.requestFocus();
 862	}
 863
 864	enum SendButtonAction {TEXT, TAKE_PHOTO, SEND_LOCATION, RECORD_VOICE, CANCEL, CHOOSE_PICTURE}
 865
 866	private int getSendButtonImageResource(SendButtonAction action, Presence.Status status) {
 867		switch (action) {
 868			case TEXT:
 869				switch (status) {
 870					case CHAT:
 871					case ONLINE:
 872						return R.drawable.ic_send_text_online;
 873					case AWAY:
 874						return R.drawable.ic_send_text_away;
 875					case XA:
 876					case DND:
 877						return R.drawable.ic_send_text_dnd;
 878					default:
 879						return R.drawable.ic_send_text_offline;
 880				}
 881			case TAKE_PHOTO:
 882				switch (status) {
 883					case CHAT:
 884					case ONLINE:
 885						return R.drawable.ic_send_photo_online;
 886					case AWAY:
 887						return R.drawable.ic_send_photo_away;
 888					case XA:
 889					case DND:
 890						return R.drawable.ic_send_photo_dnd;
 891					default:
 892						return R.drawable.ic_send_photo_offline;
 893				}
 894			case RECORD_VOICE:
 895				switch (status) {
 896					case CHAT:
 897					case ONLINE:
 898						return R.drawable.ic_send_voice_online;
 899					case AWAY:
 900						return R.drawable.ic_send_voice_away;
 901					case XA:
 902					case DND:
 903						return R.drawable.ic_send_voice_dnd;
 904					default:
 905						return R.drawable.ic_send_voice_offline;
 906				}
 907			case SEND_LOCATION:
 908				switch (status) {
 909					case CHAT:
 910					case ONLINE:
 911						return R.drawable.ic_send_location_online;
 912					case AWAY:
 913						return R.drawable.ic_send_location_away;
 914					case XA:
 915					case DND:
 916						return R.drawable.ic_send_location_dnd;
 917					default:
 918						return R.drawable.ic_send_location_offline;
 919				}
 920			case CANCEL:
 921				switch (status) {
 922					case CHAT:
 923					case ONLINE:
 924						return R.drawable.ic_send_cancel_online;
 925					case AWAY:
 926						return R.drawable.ic_send_cancel_away;
 927					case XA:
 928					case DND:
 929						return R.drawable.ic_send_cancel_dnd;
 930					default:
 931						return R.drawable.ic_send_cancel_offline;
 932				}
 933			case CHOOSE_PICTURE:
 934				switch (status) {
 935					case CHAT:
 936					case ONLINE:
 937						return R.drawable.ic_send_picture_online;
 938					case AWAY:
 939						return R.drawable.ic_send_picture_away;
 940					case XA:
 941					case DND:
 942						return R.drawable.ic_send_picture_dnd;
 943					default:
 944						return R.drawable.ic_send_picture_offline;
 945				}
 946		}
 947		return R.drawable.ic_send_text_offline;
 948	}
 949
 950	public void updateSendButton() {
 951		final Conversation c = this.conversation;
 952		final SendButtonAction action;
 953		final Presence.Status status;
 954		final boolean empty = this.mEditMessage == null || this.mEditMessage.getText().length() == 0;
 955		final boolean conference = c.getMode() == Conversation.MODE_MULTI;
 956		if (conference && !c.getAccount().httpUploadAvailable()) {
 957			if (empty && c.getNextCounterpart() != null) {
 958				action = SendButtonAction.CANCEL;
 959			} else {
 960				action = SendButtonAction.TEXT;
 961			}
 962		} else {
 963			if (empty) {
 964				if (conference && c.getNextCounterpart() != null) {
 965					action = SendButtonAction.CANCEL;
 966				} else {
 967					String setting = activity.getPreferences().getString("quick_action", "recent");
 968					if (!setting.equals("none") && UIHelper.receivedLocationQuestion(conversation.getLatestMessage())) {
 969						setting = "location";
 970					} else if (setting.equals("recent")) {
 971						setting = activity.getPreferences().getString("recently_used_quick_action", "text");
 972					}
 973					switch (setting) {
 974						case "photo":
 975							action = SendButtonAction.TAKE_PHOTO;
 976							break;
 977						case "location":
 978							action = SendButtonAction.SEND_LOCATION;
 979							break;
 980						case "voice":
 981							action = SendButtonAction.RECORD_VOICE;
 982							break;
 983						case "picture":
 984							action = SendButtonAction.CHOOSE_PICTURE;
 985							break;
 986						default:
 987							action = SendButtonAction.TEXT;
 988							break;
 989					}
 990				}
 991			} else {
 992				action = SendButtonAction.TEXT;
 993			}
 994		}
 995		if (activity.useSendButtonToIndicateStatus() && c != null
 996				&& c.getAccount().getStatus() == Account.State.ONLINE) {
 997			if (c.getMode() == Conversation.MODE_SINGLE) {
 998				status = c.getContact().getMostAvailableStatus();
 999			} else {
1000				status = c.getMucOptions().online() ? Presence.Status.ONLINE : Presence.Status.OFFLINE;
1001			}
1002		} else {
1003			status = Presence.Status.OFFLINE;
1004		}
1005		this.mSendButton.setTag(action);
1006		this.mSendButton.setImageResource(getSendButtonImageResource(action, status));
1007	}
1008
1009	protected void updateStatusMessages() {
1010		synchronized (this.messageList) {
1011			if (conversation.getMode() == Conversation.MODE_SINGLE) {
1012				ChatState state = conversation.getIncomingChatState();
1013				if (state == ChatState.COMPOSING) {
1014					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_is_typing, conversation.getName())));
1015				} else if (state == ChatState.PAUSED) {
1016					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_has_stopped_typing, conversation.getName())));
1017				} else {
1018					for (int i = this.messageList.size() - 1; i >= 0; --i) {
1019						if (this.messageList.get(i).getStatus() == Message.STATUS_RECEIVED) {
1020							return;
1021						} else {
1022							if (this.messageList.get(i).getStatus() == Message.STATUS_SEND_DISPLAYED) {
1023								this.messageList.add(i + 1,
1024										Message.createStatusMessage(conversation, getString(R.string.contact_has_read_up_to_this_point, conversation.getName())));
1025								return;
1026							}
1027						}
1028					}
1029				}
1030			}
1031		}
1032	}
1033
1034	protected void showSnackbar(final int message, final int action,
1035								final OnClickListener clickListener) {
1036		snackbar.setVisibility(View.VISIBLE);
1037		snackbar.setOnClickListener(null);
1038		snackbarMessage.setText(message);
1039		snackbarMessage.setOnClickListener(null);
1040		snackbarAction.setVisibility(View.VISIBLE);
1041		snackbarAction.setText(action);
1042		snackbarAction.setOnClickListener(clickListener);
1043	}
1044
1045	protected void hideSnackbar() {
1046		snackbar.setVisibility(View.GONE);
1047	}
1048
1049	protected void sendPlainTextMessage(Message message) {
1050		ConversationActivity activity = (ConversationActivity) getActivity();
1051		activity.xmppConnectionService.sendMessage(message);
1052		messageSent();
1053	}
1054
1055	protected void sendPgpMessage(final Message message) {
1056		final ConversationActivity activity = (ConversationActivity) getActivity();
1057		final XmppConnectionService xmppService = activity.xmppConnectionService;
1058		final Contact contact = message.getConversation().getContact();
1059		if (!activity.hasPgp()) {
1060			activity.showInstallPgpDialog();
1061			return;
1062		}
1063		if (conversation.getAccount().getPgpSignature() == null) {
1064			activity.announcePgp(conversation.getAccount(), conversation);
1065			return;
1066		}
1067		if (conversation.getMode() == Conversation.MODE_SINGLE) {
1068			if (contact.getPgpKeyId() != 0) {
1069				xmppService.getPgpEngine().hasKey(contact,
1070						new UiCallback<Contact>() {
1071
1072							@Override
1073							public void userInputRequried(PendingIntent pi,
1074														  Contact contact) {
1075								activity.runIntent(
1076										pi,
1077										ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
1078							}
1079
1080							@Override
1081							public void success(Contact contact) {
1082								messageSent();
1083								activity.encryptTextMessage(message);
1084							}
1085
1086							@Override
1087							public void error(int error, Contact contact) {
1088								System.out.println();
1089							}
1090						});
1091
1092			} else {
1093				showNoPGPKeyDialog(false,
1094						new DialogInterface.OnClickListener() {
1095
1096							@Override
1097							public void onClick(DialogInterface dialog,
1098												int which) {
1099								conversation
1100										.setNextEncryption(Message.ENCRYPTION_NONE);
1101								xmppService.databaseBackend
1102										.updateConversation(conversation);
1103								message.setEncryption(Message.ENCRYPTION_NONE);
1104								xmppService.sendMessage(message);
1105								messageSent();
1106							}
1107						});
1108			}
1109		} else {
1110			if (conversation.getMucOptions().pgpKeysInUse()) {
1111				if (!conversation.getMucOptions().everybodyHasKeys()) {
1112					Toast warning = Toast
1113							.makeText(getActivity(),
1114									R.string.missing_public_keys,
1115									Toast.LENGTH_LONG);
1116					warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
1117					warning.show();
1118				}
1119				activity.encryptTextMessage(message);
1120				messageSent();
1121			} else {
1122				showNoPGPKeyDialog(true,
1123						new DialogInterface.OnClickListener() {
1124
1125							@Override
1126							public void onClick(DialogInterface dialog,
1127												int which) {
1128								conversation
1129										.setNextEncryption(Message.ENCRYPTION_NONE);
1130								message.setEncryption(Message.ENCRYPTION_NONE);
1131								xmppService.databaseBackend
1132										.updateConversation(conversation);
1133								xmppService.sendMessage(message);
1134								messageSent();
1135							}
1136						});
1137			}
1138		}
1139	}
1140
1141	public void showNoPGPKeyDialog(boolean plural,
1142								   DialogInterface.OnClickListener listener) {
1143		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
1144		builder.setIconAttribute(android.R.attr.alertDialogIcon);
1145		if (plural) {
1146			builder.setTitle(getString(R.string.no_pgp_keys));
1147			builder.setMessage(getText(R.string.contacts_have_no_pgp_keys));
1148		} else {
1149			builder.setTitle(getString(R.string.no_pgp_key));
1150			builder.setMessage(getText(R.string.contact_has_no_pgp_key));
1151		}
1152		builder.setNegativeButton(getString(R.string.cancel), null);
1153		builder.setPositiveButton(getString(R.string.send_unencrypted),
1154				listener);
1155		builder.create().show();
1156	}
1157
1158	protected void sendAxolotlMessage(final Message message) {
1159		final ConversationActivity activity = (ConversationActivity) getActivity();
1160		final XmppConnectionService xmppService = activity.xmppConnectionService;
1161		xmppService.sendMessage(message);
1162		messageSent();
1163	}
1164
1165	protected void sendOtrMessage(final Message message) {
1166		final ConversationActivity activity = (ConversationActivity) getActivity();
1167		final XmppConnectionService xmppService = activity.xmppConnectionService;
1168		activity.selectPresence(message.getConversation(),
1169				new OnPresenceSelected() {
1170
1171					@Override
1172					public void onPresenceSelected() {
1173						message.setCounterpart(conversation.getNextCounterpart());
1174						xmppService.sendMessage(message);
1175						messageSent();
1176					}
1177				});
1178	}
1179
1180	public void appendText(String text) {
1181		if (text == null) {
1182			return;
1183		}
1184		String previous = this.mEditMessage.getText().toString();
1185		if (previous.length() != 0 && !previous.endsWith(" ")) {
1186			text = " " + text;
1187		}
1188		this.mEditMessage.append(text);
1189	}
1190
1191	@Override
1192	public boolean onEnterPressed() {
1193		if (activity.enterIsSend()) {
1194			sendMessage();
1195			return true;
1196		} else {
1197			return false;
1198		}
1199	}
1200
1201	@Override
1202	public void onTypingStarted() {
1203		Account.State status = conversation.getAccount().getStatus();
1204		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.COMPOSING)) {
1205			activity.xmppConnectionService.sendChatState(conversation);
1206		}
1207		activity.hideConversationsOverview();
1208		updateSendButton();
1209	}
1210
1211	@Override
1212	public void onTypingStopped() {
1213		Account.State status = conversation.getAccount().getStatus();
1214		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.PAUSED)) {
1215			activity.xmppConnectionService.sendChatState(conversation);
1216		}
1217	}
1218
1219	@Override
1220	public void onTextDeleted() {
1221		Account.State status = conversation.getAccount().getStatus();
1222		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
1223			activity.xmppConnectionService.sendChatState(conversation);
1224		}
1225		updateSendButton();
1226	}
1227
1228	private int completionIndex = 0;
1229	private int lastCompletionLength = 0;
1230	private String incomplete;
1231	private int lastCompletionCursor;
1232	private boolean firstWord = false;
1233
1234	@Override
1235	public boolean onTabPressed(boolean repeated) {
1236		if (conversation == null || conversation.getMode() == Conversation.MODE_SINGLE) {
1237			return false;
1238		}
1239		if (repeated) {
1240			completionIndex++;
1241		} else {
1242			lastCompletionLength = 0;
1243			completionIndex = 0;
1244			final String content = mEditMessage.getText().toString();
1245			lastCompletionCursor = mEditMessage.getSelectionEnd();
1246			int start = lastCompletionCursor > 0 ? content.lastIndexOf(" ",lastCompletionCursor-1) + 1 : 0;
1247			firstWord = start == 0;
1248			incomplete = content.substring(start,lastCompletionCursor);
1249		}
1250		List<String> completions = new ArrayList<>();
1251		for(MucOptions.User user : conversation.getMucOptions().getUsers()) {
1252			if (user.getName().startsWith(incomplete)) {
1253				completions.add(user.getName()+(firstWord ? ": " : " "));
1254			}
1255		}
1256		Collections.sort(completions);
1257		if (completions.size() > completionIndex) {
1258			String completion = completions.get(completionIndex).substring(incomplete.length());
1259			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
1260			mEditMessage.getEditableText().insert(lastCompletionCursor, completion);
1261			lastCompletionLength = completion.length();
1262		} else {
1263			completionIndex = -1;
1264			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
1265			lastCompletionLength = 0;
1266		}
1267		return true;
1268	}
1269
1270	@Override
1271	public void onActivityResult(int requestCode, int resultCode,
1272	                                final Intent data) {
1273		if (resultCode == Activity.RESULT_OK) {
1274			if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
1275				activity.getSelectedConversation().getAccount().getPgpDecryptionService().onKeychainUnlocked();
1276				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
1277				updatePgpMessages();
1278			} else if (requestCode == ConversationActivity.REQUEST_TRUST_KEYS_TEXT) {
1279				final String body = mEditMessage.getText().toString();
1280				Message message = new Message(conversation, body, conversation.getNextEncryption());
1281				sendAxolotlMessage(message);
1282			} else if (requestCode == ConversationActivity.REQUEST_TRUST_KEYS_MENU) {
1283				int choice = data.getIntExtra("choice", ConversationActivity.ATTACHMENT_CHOICE_INVALID);
1284				activity.selectPresenceToAttachFile(choice, conversation.getNextEncryption());
1285			}
1286		} else {
1287			if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
1288				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
1289				updatePgpMessages();
1290			}
1291		}
1292	}
1293
1294}