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