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;
  43
  44import eu.siacs.conversations.Config;
  45import eu.siacs.conversations.R;
  46import eu.siacs.conversations.crypto.axolotl.AxolotlService;
  47import eu.siacs.conversations.entities.Account;
  48import eu.siacs.conversations.entities.Contact;
  49import eu.siacs.conversations.entities.Conversation;
  50import eu.siacs.conversations.entities.DownloadableFile;
  51import eu.siacs.conversations.entities.Message;
  52import eu.siacs.conversations.entities.MucOptions;
  53import eu.siacs.conversations.entities.Presence;
  54import eu.siacs.conversations.entities.Presences;
  55import eu.siacs.conversations.entities.Transferable;
  56import eu.siacs.conversations.entities.TransferablePlaceholder;
  57import eu.siacs.conversations.services.XmppConnectionService;
  58import eu.siacs.conversations.ui.XmppActivity.OnPresenceSelected;
  59import eu.siacs.conversations.ui.XmppActivity.OnValueEdited;
  60import eu.siacs.conversations.ui.adapter.MessageAdapter;
  61import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureClicked;
  62import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureLongClicked;
  63import eu.siacs.conversations.utils.GeoHelper;
  64import eu.siacs.conversations.utils.UIHelper;
  65import eu.siacs.conversations.xmpp.chatstate.ChatState;
  66import eu.siacs.conversations.xmpp.jid.Jid;
  67
  68public class ConversationFragment extends Fragment implements EditMessage.KeyboardListener {
  69
  70	protected Conversation conversation;
  71	private OnClickListener leaveMuc = new OnClickListener() {
  72
  73		@Override
  74		public void onClick(View v) {
  75			activity.endConversation(conversation);
  76		}
  77	};
  78	private OnClickListener joinMuc = new OnClickListener() {
  79
  80		@Override
  81		public void onClick(View v) {
  82			activity.xmppConnectionService.joinMuc(conversation);
  83		}
  84	};
  85	private OnClickListener enterPassword = new OnClickListener() {
  86
  87		@Override
  88		public void onClick(View v) {
  89			MucOptions muc = conversation.getMucOptions();
  90			String password = muc.getPassword();
  91			if (password == null) {
  92				password = "";
  93			}
  94			activity.quickPasswordEdit(password, new OnValueEdited() {
  95
  96				@Override
  97				public void onValueEdited(String value) {
  98					activity.xmppConnectionService.providePasswordForMuc(
  99							conversation, value);
 100				}
 101			});
 102		}
 103	};
 104	protected ListView messagesView;
 105	final protected List<Message> messageList = new ArrayList<>();
 106	protected MessageAdapter messageListAdapter;
 107	private EditMessage mEditMessage;
 108	private ImageButton mSendButton;
 109	private RelativeLayout snackbar;
 110	private TextView snackbarMessage;
 111	private TextView snackbarAction;
 112	private boolean messagesLoaded = true;
 113	private Toast messageLoaderToast;
 114
 115	private OnScrollListener mOnScrollListener = new OnScrollListener() {
 116
 117		@Override
 118		public void onScrollStateChanged(AbsListView view, int scrollState) {
 119			// TODO Auto-generated method stub
 120
 121		}
 122
 123		private int getIndexOf(String uuid, List<Message> messages) {
 124			if (uuid == null) {
 125				return 0;
 126			}
 127			for(int i = 0; i < messages.size(); ++i) {
 128				if (uuid.equals(messages.get(i).getUuid())) {
 129					return i;
 130				} else {
 131					Message next = messages.get(i);
 132					while(next != null && next.wasMergedIntoPrevious()) {
 133						if (uuid.equals(next.getUuid())) {
 134							return i;
 135						}
 136						next = next.next();
 137					}
 138
 139				}
 140			}
 141			return 0;
 142		}
 143
 144		@Override
 145		public void onScroll(AbsListView view, int firstVisibleItem,
 146							 int visibleItemCount, int totalItemCount) {
 147			synchronized (ConversationFragment.this.messageList) {
 148				if (firstVisibleItem < 5 && messagesLoaded && messageList.size() > 0) {
 149					long timestamp;
 150					if (messageList.get(0).getType() == Message.TYPE_STATUS && messageList.size() >= 2) {
 151						timestamp = messageList.get(1).getTimeSent();
 152					} else {
 153						timestamp = messageList.get(0).getTimeSent();
 154					}
 155					messagesLoaded = false;
 156					activity.xmppConnectionService.loadMoreMessages(conversation, timestamp, new XmppConnectionService.OnMoreMessagesLoaded() {
 157						@Override
 158						public void onMoreMessagesLoaded(final int c, Conversation conversation) {
 159							if (ConversationFragment.this.conversation != conversation) {
 160								return;
 161							}
 162							activity.runOnUiThread(new Runnable() {
 163								@Override
 164								public void run() {
 165									final int oldPosition = messagesView.getFirstVisiblePosition();
 166									Message message = messageList.get(oldPosition);
 167									String uuid = message != null ? message.getUuid() : null;
 168									View v = messagesView.getChildAt(0);
 169									final int pxOffset = (v == null) ? 0 : v.getTop();
 170									ConversationFragment.this.conversation.populateWithMessages(ConversationFragment.this.messageList);
 171									updateStatusMessages();
 172									messageListAdapter.notifyDataSetChanged();
 173									int pos = getIndexOf(uuid,messageList);
 174									messagesView.setSelectionFromTop(pos, pxOffset);
 175									messagesLoaded = true;
 176									if (messageLoaderToast != null) {
 177										messageLoaderToast.cancel();
 178									}
 179								}
 180							});
 181						}
 182
 183						@Override
 184						public void informUser(final int resId) {
 185
 186							activity.runOnUiThread(new Runnable() {
 187								@Override
 188								public void run() {
 189									if (messageLoaderToast != null) {
 190										messageLoaderToast.cancel();
 191									}
 192									if (ConversationFragment.this.conversation != conversation) {
 193										return;
 194									}
 195									messageLoaderToast = Toast.makeText(activity, resId, Toast.LENGTH_LONG);
 196									messageLoaderToast.show();
 197								}
 198							});
 199
 200						}
 201					});
 202
 203				}
 204			}
 205		}
 206	};
 207	private final int KEYCHAIN_UNLOCK_NOT_REQUIRED = 0;
 208	private final int KEYCHAIN_UNLOCK_REQUIRED = 1;
 209	private final int KEYCHAIN_UNLOCK_PENDING = 2;
 210	private int keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 211	protected OnClickListener clickToDecryptListener = new OnClickListener() {
 212
 213		@Override
 214		public void onClick(View v) {
 215			if (keychainUnlock == KEYCHAIN_UNLOCK_REQUIRED
 216					&& activity.hasPgp() && !conversation.getAccount().getPgpDecryptionService().isRunning()) {
 217				keychainUnlock = KEYCHAIN_UNLOCK_PENDING;
 218				updateSnackBar(conversation);
 219				Message message = getLastPgpDecryptableMessage();
 220				if (message != null) {
 221					activity.xmppConnectionService.getPgpEngine().decrypt(message, new UiCallback<Message>() {
 222						@Override
 223						public void success(Message object) {
 224							conversation.getAccount().getPgpDecryptionService().onKeychainUnlocked();
 225							keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 226						}
 227
 228						@Override
 229						public void error(int errorCode, Message object) {
 230							keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 231						}
 232
 233						@Override
 234						public void userInputRequried(PendingIntent pi, Message object) {
 235							try {
 236								activity.startIntentSenderForResult(pi.getIntentSender(),
 237										ConversationActivity.REQUEST_DECRYPT_PGP, null, 0, 0, 0);
 238							} catch (SendIntentException e) {
 239								keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 240								updatePgpMessages();
 241							}
 242						}
 243					});
 244				}
 245			} else {
 246				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 247				updatePgpMessages();
 248			}
 249		}
 250	};
 251	protected OnClickListener clickToVerify = new OnClickListener() {
 252
 253		@Override
 254		public void onClick(View v) {
 255			activity.verifyOtrSessionDialog(conversation, v);
 256		}
 257	};
 258	private OnEditorActionListener mEditorActionListener = new OnEditorActionListener() {
 259
 260		@Override
 261		public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
 262			if (actionId == EditorInfo.IME_ACTION_SEND) {
 263				InputMethodManager imm = (InputMethodManager) v.getContext()
 264						.getSystemService(Context.INPUT_METHOD_SERVICE);
 265				if (imm.isFullscreenMode()) {
 266					imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
 267				}
 268				sendMessage();
 269				return true;
 270			} else {
 271				return false;
 272			}
 273		}
 274	};
 275	private OnClickListener mSendButtonListener = new OnClickListener() {
 276
 277		@Override
 278		public void onClick(View v) {
 279			Object tag = v.getTag();
 280			if (tag instanceof SendButtonAction) {
 281				SendButtonAction action = (SendButtonAction) tag;
 282				switch (action) {
 283					case TAKE_PHOTO:
 284						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_TAKE_PHOTO);
 285						break;
 286					case SEND_LOCATION:
 287						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_LOCATION);
 288						break;
 289					case RECORD_VOICE:
 290						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_RECORD_VOICE);
 291						break;
 292					case CHOOSE_PICTURE:
 293						activity.attachFile(ConversationActivity.ATTACHMENT_CHOICE_CHOOSE_IMAGE);
 294						break;
 295					case CANCEL:
 296						if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
 297							conversation.setNextCounterpart(null);
 298							updateChatMsgHint();
 299							updateSendButton();
 300						}
 301						break;
 302					default:
 303						sendMessage();
 304				}
 305			} else {
 306				sendMessage();
 307			}
 308		}
 309	};
 310	private OnClickListener clickToMuc = new OnClickListener() {
 311
 312		@Override
 313		public void onClick(View v) {
 314			Intent intent = new Intent(getActivity(), ConferenceDetailsActivity.class);
 315			intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
 316			intent.putExtra("uuid", conversation.getUuid());
 317			startActivity(intent);
 318		}
 319	};
 320	private ConversationActivity activity;
 321	private Message selectedMessage;
 322
 323	public void setMessagesLoaded() {
 324		this.messagesLoaded = true;
 325	}
 326
 327	private void sendMessage() {
 328		final String body = mEditMessage.getText().toString();
 329		if (body.length() == 0 || this.conversation == null) {
 330			return;
 331		}
 332		Message message = new Message(conversation, body, conversation.getNextEncryption());
 333		if (conversation.getMode() == Conversation.MODE_MULTI) {
 334			if (conversation.getNextCounterpart() != null) {
 335				message.setCounterpart(conversation.getNextCounterpart());
 336				message.setType(Message.TYPE_PRIVATE);
 337			}
 338		}
 339		switch (conversation.getNextEncryption()) {
 340			case Message.ENCRYPTION_OTR:
 341				sendOtrMessage(message);
 342				break;
 343			case Message.ENCRYPTION_PGP:
 344				sendPgpMessage(message);
 345				break;
 346			case Message.ENCRYPTION_AXOLOTL:
 347				if(!activity.trustKeysIfNeeded(ConversationActivity.REQUEST_TRUST_KEYS_TEXT)) {
 348					sendAxolotlMessage(message);
 349				}
 350				break;
 351			default:
 352				sendPlainTextMessage(message);
 353		}
 354	}
 355
 356	public void updateChatMsgHint() {
 357		final boolean multi = conversation.getMode() == Conversation.MODE_MULTI;
 358		if (multi && conversation.getNextCounterpart() != null) {
 359			this.mEditMessage.setHint(getString(
 360					R.string.send_private_message_to,
 361					conversation.getNextCounterpart().getResourcepart()));
 362		} else if (multi && !conversation.getMucOptions().participating()) {
 363			this.mEditMessage.setHint(R.string.you_are_not_participating);
 364		} else {
 365			switch (conversation.getNextEncryption()) {
 366				case Message.ENCRYPTION_NONE:
 367					mEditMessage
 368							.setHint(getString(R.string.send_unencrypted_message));
 369					break;
 370				case Message.ENCRYPTION_OTR:
 371					mEditMessage.setHint(getString(R.string.send_otr_message));
 372					break;
 373				case Message.ENCRYPTION_AXOLOTL:
 374					AxolotlService axolotlService = conversation.getAccount().getAxolotlService();
 375					if (axolotlService != null && axolotlService.trustedSessionVerified(conversation)) {
 376						mEditMessage.setHint(getString(R.string.send_omemo_x509_message));
 377					} else {
 378						mEditMessage.setHint(getString(R.string.send_omemo_message));
 379					}
 380					break;
 381				case Message.ENCRYPTION_PGP:
 382					mEditMessage.setHint(getString(R.string.send_pgp_message));
 383					break;
 384				default:
 385					break;
 386			}
 387			getActivity().invalidateOptionsMenu();
 388		}
 389	}
 390
 391	public void setupIme() {
 392		if (activity == null) {
 393			return;
 394		} else if (activity.usingEnterKey() && activity.enterIsSend()) {
 395			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_FLAG_MULTI_LINE));
 396			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
 397		} else if (activity.usingEnterKey()) {
 398			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
 399			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
 400		} else {
 401			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
 402			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE);
 403		}
 404	}
 405
 406	@Override
 407	public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 408		final View view = inflater.inflate(R.layout.fragment_conversation, container, false);
 409		view.setOnClickListener(null);
 410		mEditMessage = (EditMessage) view.findViewById(R.id.textinput);
 411		mEditMessage.setOnClickListener(new OnClickListener() {
 412
 413			@Override
 414			public void onClick(View v) {
 415				if (activity != null) {
 416					activity.hideConversationsOverview();
 417				}
 418			}
 419		});
 420		mEditMessage.setOnEditorActionListener(mEditorActionListener);
 421
 422		mSendButton = (ImageButton) view.findViewById(R.id.textSendButton);
 423		mSendButton.setOnClickListener(this.mSendButtonListener);
 424
 425		snackbar = (RelativeLayout) view.findViewById(R.id.snackbar);
 426		snackbarMessage = (TextView) view.findViewById(R.id.snackbar_message);
 427		snackbarAction = (TextView) view.findViewById(R.id.snackbar_action);
 428
 429		messagesView = (ListView) view.findViewById(R.id.messages_view);
 430		messagesView.setOnScrollListener(mOnScrollListener);
 431		messagesView.setTranscriptMode(ListView.TRANSCRIPT_MODE_NORMAL);
 432		messageListAdapter = new MessageAdapter((ConversationActivity) getActivity(), this.messageList);
 433		messageListAdapter.setOnContactPictureClicked(new OnContactPictureClicked() {
 434
 435			@Override
 436			public void onContactPictureClicked(Message message) {
 437				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 438					if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
 439						if (message.getCounterpart() != null) {
 440							String user = message.getCounterpart().isBareJid() ? message.getCounterpart().toString() : message.getCounterpart().getResourcepart();
 441							if (!message.getConversation().getMucOptions().isUserInRoom(user)) {
 442								Toast.makeText(activity,activity.getString(R.string.user_has_left_conference,user),Toast.LENGTH_SHORT).show();
 443							}
 444							highlightInConference(user);
 445						}
 446					} else {
 447						activity.switchToContactDetails(message.getContact(), message.getAxolotlFingerprint());
 448					}
 449				} else {
 450					Account account = message.getConversation().getAccount();
 451					Intent intent = new Intent(activity, EditAccountActivity.class);
 452					intent.putExtra("jid", account.getJid().toBareJid().toString());
 453					intent.putExtra("fingerprint", message.getAxolotlFingerprint());
 454					startActivity(intent);
 455				}
 456			}
 457		});
 458		messageListAdapter
 459				.setOnContactPictureLongClicked(new OnContactPictureLongClicked() {
 460
 461					@Override
 462					public void onContactPictureLongClicked(Message message) {
 463						if (message.getStatus() <= Message.STATUS_RECEIVED) {
 464							if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
 465								if (message.getCounterpart() != null) {
 466									String user = message.getCounterpart().getResourcepart();
 467									if (user != null) {
 468										if (message.getConversation().getMucOptions().isUserInRoom(user)) {
 469											privateMessageWith(message.getCounterpart());
 470										} else {
 471											Toast.makeText(activity, activity.getString(R.string.user_has_left_conference, user), Toast.LENGTH_SHORT).show();
 472										}
 473									}
 474								}
 475							}
 476						} else {
 477							activity.showQrCode();
 478						}
 479					}
 480				});
 481		messagesView.setAdapter(messageListAdapter);
 482
 483		registerForContextMenu(messagesView);
 484
 485		return view;
 486	}
 487
 488	@Override
 489	public void onCreateContextMenu(ContextMenu menu, View v,
 490									ContextMenuInfo menuInfo) {
 491		synchronized (this.messageList) {
 492			super.onCreateContextMenu(menu, v, menuInfo);
 493			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
 494			this.selectedMessage = this.messageList.get(acmi.position);
 495			populateContextMenu(menu);
 496		}
 497	}
 498
 499	private void populateContextMenu(ContextMenu menu) {
 500		final Message m = this.selectedMessage;
 501		if (m.getType() != Message.TYPE_STATUS) {
 502			activity.getMenuInflater().inflate(R.menu.message_context, menu);
 503			menu.setHeaderTitle(R.string.message_options);
 504			MenuItem copyText = menu.findItem(R.id.copy_text);
 505			MenuItem shareWith = menu.findItem(R.id.share_with);
 506			MenuItem sendAgain = menu.findItem(R.id.send_again);
 507			MenuItem copyUrl = menu.findItem(R.id.copy_url);
 508			MenuItem downloadFile = menu.findItem(R.id.download_file);
 509			MenuItem cancelTransmission = menu.findItem(R.id.cancel_transmission);
 510			if ((m.getType() == Message.TYPE_TEXT || m.getType() == Message.TYPE_PRIVATE)
 511					&& m.getTransferable() == null
 512					&& !GeoHelper.isGeoUri(m.getBody())
 513					&& m.treatAsDownloadable() != Message.Decision.MUST) {
 514				copyText.setVisible(true);
 515			}
 516			if ((m.getType() != Message.TYPE_TEXT
 517					&& m.getType() != Message.TYPE_PRIVATE
 518					&& m.getTransferable() == null)
 519					|| (GeoHelper.isGeoUri(m.getBody()))) {
 520				shareWith.setVisible(true);
 521			}
 522			if (m.getStatus() == Message.STATUS_SEND_FAILED) {
 523				sendAgain.setVisible(true);
 524			}
 525			if (m.hasFileOnRemoteHost()
 526					|| GeoHelper.isGeoUri(m.getBody())
 527					|| m.treatAsDownloadable() == Message.Decision.MUST) {
 528				copyUrl.setVisible(true);
 529			}
 530			if ((m.getType() == Message.TYPE_TEXT && m.getTransferable() == null && m.treatAsDownloadable() != Message.Decision.NEVER)
 531					|| (m.isFileOrImage() && m.getTransferable() instanceof TransferablePlaceholder && m.hasFileOnRemoteHost())){
 532				downloadFile.setVisible(true);
 533				downloadFile.setTitle(activity.getString(R.string.download_x_file,UIHelper.getFileDescriptionString(activity, m)));
 534			}
 535			if ((m.getTransferable() != null && !(m.getTransferable() instanceof TransferablePlaceholder))
 536					|| (m.isFileOrImage() && (m.getStatus() == Message.STATUS_WAITING
 537					|| m.getStatus() == Message.STATUS_OFFERED))) {
 538				cancelTransmission.setVisible(true);
 539			}
 540		}
 541	}
 542
 543	@Override
 544	public boolean onContextItemSelected(MenuItem item) {
 545		switch (item.getItemId()) {
 546			case R.id.share_with:
 547				shareWith(selectedMessage);
 548				return true;
 549			case R.id.copy_text:
 550				copyText(selectedMessage);
 551				return true;
 552			case R.id.send_again:
 553				resendMessage(selectedMessage);
 554				return true;
 555			case R.id.copy_url:
 556				copyUrl(selectedMessage);
 557				return true;
 558			case R.id.download_file:
 559				downloadFile(selectedMessage);
 560				return true;
 561			case R.id.cancel_transmission:
 562				cancelTransmission(selectedMessage);
 563				return true;
 564			default:
 565				return super.onContextItemSelected(item);
 566		}
 567	}
 568
 569	private void shareWith(Message message) {
 570		Intent shareIntent = new Intent();
 571		shareIntent.setAction(Intent.ACTION_SEND);
 572		if (GeoHelper.isGeoUri(message.getBody())) {
 573			shareIntent.putExtra(Intent.EXTRA_TEXT, message.getBody());
 574			shareIntent.setType("text/plain");
 575		} else {
 576			shareIntent.putExtra(Intent.EXTRA_STREAM,
 577					activity.xmppConnectionService.getFileBackend()
 578							.getJingleFileUri(message));
 579			shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 580			String mime = message.getMimeType();
 581			if (mime == null) {
 582				mime = "*/*";
 583			}
 584			shareIntent.setType(mime);
 585		}
 586		try {
 587			activity.startActivity(Intent.createChooser(shareIntent, getText(R.string.share_with)));
 588		} catch (ActivityNotFoundException e) {
 589			//This should happen only on faulty androids because normally chooser is always available
 590			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
 591		}
 592	}
 593
 594	private void copyText(Message message) {
 595		if (activity.copyTextToClipboard(message.getMergedBody(),
 596				R.string.message_text)) {
 597			Toast.makeText(activity, R.string.message_copied_to_clipboard,
 598					Toast.LENGTH_SHORT).show();
 599		}
 600	}
 601
 602	private void resendMessage(Message message) {
 603		if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
 604			DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 605			if (!file.exists()) {
 606				Toast.makeText(activity, R.string.file_deleted, Toast.LENGTH_SHORT).show();
 607				message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
 608				return;
 609			}
 610		}
 611		activity.xmppConnectionService.resendFailedMessages(message);
 612	}
 613
 614	private void copyUrl(Message message) {
 615		final String url;
 616		final int resId;
 617		if (GeoHelper.isGeoUri(message.getBody())) {
 618			resId = R.string.location;
 619			url = message.getBody();
 620		} else if (message.hasFileOnRemoteHost()) {
 621			resId = R.string.file_url;
 622			url = message.getFileParams().url.toString();
 623		} else {
 624			url = message.getBody().trim();
 625			resId = R.string.file_url;
 626		}
 627		if (activity.copyTextToClipboard(url, resId)) {
 628			Toast.makeText(activity, R.string.url_copied_to_clipboard,
 629					Toast.LENGTH_SHORT).show();
 630		}
 631	}
 632
 633	private void downloadFile(Message message) {
 634		activity.xmppConnectionService.getHttpConnectionManager()
 635				.createNewDownloadConnection(message,true);
 636	}
 637
 638	private void cancelTransmission(Message message) {
 639		Transferable transferable = message.getTransferable();
 640		if (transferable != null) {
 641			transferable.cancel();
 642		} else {
 643			activity.xmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
 644		}
 645	}
 646
 647	protected void privateMessageWith(final Jid counterpart) {
 648		this.mEditMessage.setText("");
 649		this.conversation.setNextCounterpart(counterpart);
 650		updateChatMsgHint();
 651		updateSendButton();
 652	}
 653
 654	protected void highlightInConference(String nick) {
 655		String oldString = mEditMessage.getText().toString().trim();
 656		if (oldString.isEmpty() || mEditMessage.getSelectionStart() == 0) {
 657			mEditMessage.getText().insert(0, nick + ": ");
 658		} else {
 659			if (mEditMessage.getText().charAt(
 660					mEditMessage.getSelectionStart() - 1) != ' ') {
 661				nick = " " + nick;
 662			}
 663			mEditMessage.getText().insert(mEditMessage.getSelectionStart(),
 664					nick + " ");
 665		}
 666	}
 667
 668	@Override
 669	public void onStop() {
 670		super.onStop();
 671		if (this.conversation != null) {
 672			final String msg = mEditMessage.getText().toString();
 673			this.conversation.setNextMessage(msg);
 674			updateChatState(this.conversation, msg);
 675		}
 676	}
 677
 678	private void updateChatState(final Conversation conversation, final String msg) {
 679		ChatState state = msg.length() == 0 ? Config.DEFAULT_CHATSTATE : ChatState.PAUSED;
 680		Account.State status = conversation.getAccount().getStatus();
 681		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(state)) {
 682			activity.xmppConnectionService.sendChatState(conversation);
 683		}
 684	}
 685
 686	public void reInit(Conversation conversation) {
 687		if (conversation == null) {
 688			return;
 689		}
 690		this.activity = (ConversationActivity) getActivity();
 691		setupIme();
 692		if (this.conversation != null) {
 693			final String msg = mEditMessage.getText().toString();
 694			this.conversation.setNextMessage(msg);
 695			if (this.conversation != conversation) {
 696				updateChatState(this.conversation, msg);
 697			}
 698			this.conversation.trim();
 699		}
 700
 701		this.keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 702		this.conversation = conversation;
 703		if (this.conversation.getMode() == Conversation.MODE_MULTI) {
 704			this.conversation.setNextCounterpart(null);
 705		}
 706		boolean canWrite = this.conversation.getMode() == Conversation.MODE_SINGLE || this.conversation.getMucOptions().participating();
 707		this.mEditMessage.setEnabled(canWrite);
 708		this.mSendButton.setEnabled(canWrite);
 709		this.mEditMessage.setKeyboardListener(null);
 710		this.mEditMessage.setText("");
 711		this.mEditMessage.append(this.conversation.getNextMessage());
 712		this.mEditMessage.setKeyboardListener(this);
 713		messageListAdapter.updatePreferences();
 714		this.messagesView.setAdapter(messageListAdapter);
 715		updateMessages();
 716		this.messagesLoaded = true;
 717		int size = this.messageList.size();
 718		if (size > 0) {
 719			messagesView.setSelection(size - 1);
 720		}
 721	}
 722
 723	private OnClickListener mUnblockClickListener = new OnClickListener() {
 724		@Override
 725		public void onClick(final View v) {
 726			v.post(new Runnable() {
 727				@Override
 728				public void run() {
 729					v.setVisibility(View.INVISIBLE);
 730				}
 731			});
 732			if (conversation.isDomainBlocked()) {
 733				BlockContactDialog.show(activity, activity.xmppConnectionService, conversation);
 734			} else {
 735				activity.unblockConversation(conversation);
 736			}
 737		}
 738	};
 739
 740	private OnClickListener mAddBackClickListener = new OnClickListener() {
 741
 742		@Override
 743		public void onClick(View v) {
 744			final Contact contact = conversation == null ? null : conversation.getContact();
 745			if (contact != null) {
 746				activity.xmppConnectionService.createContact(contact);
 747				activity.switchToContactDetails(contact);
 748			}
 749		}
 750	};
 751
 752	private OnClickListener mAnswerSmpClickListener = new OnClickListener() {
 753		@Override
 754		public void onClick(View view) {
 755			Intent intent = new Intent(activity, VerifyOTRActivity.class);
 756			intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
 757			intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
 758			intent.putExtra(VerifyOTRActivity.EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
 759			intent.putExtra("mode", VerifyOTRActivity.MODE_ANSWER_QUESTION);
 760			startActivity(intent);
 761		}
 762	};
 763
 764	private void updateSnackBar(final Conversation conversation) {
 765		final Account account = conversation.getAccount();
 766		final Contact contact = conversation.getContact();
 767		final int mode = conversation.getMode();
 768		if (conversation.isBlocked()) {
 769			showSnackbar(R.string.contact_blocked, R.string.unblock, this.mUnblockClickListener);
 770		} else if (!contact.showInRoster() && contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
 771			showSnackbar(R.string.contact_added_you, R.string.add_back, this.mAddBackClickListener);
 772		} else if (mode == Conversation.MODE_MULTI
 773				&& !conversation.getMucOptions().online()
 774				&& account.getStatus() == Account.State.ONLINE) {
 775			switch (conversation.getMucOptions().getError()) {
 776				case MucOptions.ERROR_NICK_IN_USE:
 777					showSnackbar(R.string.nick_in_use, R.string.edit, clickToMuc);
 778					break;
 779				case MucOptions.ERROR_NO_RESPONSE:
 780					showSnackbar(R.string.conference_not_found, R.string.leave, leaveMuc);
 781					break;
 782				case MucOptions.ERROR_PASSWORD_REQUIRED:
 783					showSnackbar(R.string.conference_requires_password, R.string.enter_password, enterPassword);
 784					break;
 785				case MucOptions.ERROR_BANNED:
 786					showSnackbar(R.string.conference_banned, R.string.leave, leaveMuc);
 787					break;
 788				case MucOptions.ERROR_MEMBERS_ONLY:
 789					showSnackbar(R.string.conference_members_only, R.string.leave, leaveMuc);
 790					break;
 791				case MucOptions.KICKED_FROM_ROOM:
 792					showSnackbar(R.string.conference_kicked, R.string.join, joinMuc);
 793					break;
 794				case MucOptions.ERROR_UNKNOWN:
 795					showSnackbar(R.string.conference_unknown_error, R.string.try_again, joinMuc);
 796					break;
 797				default:
 798					break;
 799			}
 800		} else if (keychainUnlock == KEYCHAIN_UNLOCK_REQUIRED) {
 801			showSnackbar(R.string.openpgp_messages_found, R.string.decrypt, clickToDecryptListener);
 802		} else if (mode == Conversation.MODE_SINGLE
 803				&& conversation.smpRequested()) {
 804			showSnackbar(R.string.smp_requested, R.string.verify, this.mAnswerSmpClickListener);
 805		} else if (mode == Conversation.MODE_SINGLE
 806				&& conversation.hasValidOtrSession()
 807				&& (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED)
 808				&& (!conversation.isOtrFingerprintVerified())) {
 809			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify, clickToVerify);
 810		} else {
 811			hideSnackbar();
 812		}
 813	}
 814
 815	public void updateMessages() {
 816		synchronized (this.messageList) {
 817			if (getView() == null) {
 818				return;
 819			}
 820			final ConversationActivity activity = (ConversationActivity) getActivity();
 821			if (this.conversation != null) {
 822				conversation.populateWithMessages(ConversationFragment.this.messageList);
 823				updatePgpMessages();
 824				updateSnackBar(conversation);
 825				updateStatusMessages();
 826				this.messageListAdapter.notifyDataSetChanged();
 827				updateChatMsgHint();
 828				if (!activity.isConversationsOverviewVisable() || !activity.isConversationsOverviewHideable()) {
 829					activity.sendReadMarkerIfNecessary(conversation);
 830				}
 831				this.updateSendButton();
 832			}
 833		}
 834	}
 835
 836	public void updatePgpMessages() {
 837		if (keychainUnlock != KEYCHAIN_UNLOCK_PENDING) {
 838			if (getLastPgpDecryptableMessage() != null
 839					&& !conversation.getAccount().getPgpDecryptionService().isRunning()) {
 840				keychainUnlock = KEYCHAIN_UNLOCK_REQUIRED;
 841			} else {
 842				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 843			}
 844		}
 845	}
 846
 847	@Nullable
 848	private Message getLastPgpDecryptableMessage() {
 849		for (final Message message : this.messageList) {
 850			if (message.getEncryption() == Message.ENCRYPTION_PGP
 851					&& (message.getStatus() == Message.STATUS_RECEIVED || message.getStatus() >= Message.STATUS_SEND)
 852					&& message.getTransferable() == null) {
 853				return message;
 854			}
 855		}
 856		return null;
 857	}
 858
 859	private void messageSent() {
 860		int size = this.messageList.size();
 861		messagesView.setSelection(size - 1);
 862		mEditMessage.setText("");
 863		updateChatMsgHint();
 864	}
 865
 866	public void setFocusOnInputField() {
 867		mEditMessage.requestFocus();
 868	}
 869
 870	enum SendButtonAction {TEXT, TAKE_PHOTO, SEND_LOCATION, RECORD_VOICE, CANCEL, CHOOSE_PICTURE}
 871
 872	private int getSendButtonImageResource(SendButtonAction action, Presence.Status status) {
 873		switch (action) {
 874			case TEXT:
 875				switch (status) {
 876					case CHAT:
 877					case ONLINE:
 878						return R.drawable.ic_send_text_online;
 879					case AWAY:
 880						return R.drawable.ic_send_text_away;
 881					case XA:
 882					case DND:
 883						return R.drawable.ic_send_text_dnd;
 884					default:
 885						return R.drawable.ic_send_text_offline;
 886				}
 887			case TAKE_PHOTO:
 888				switch (status) {
 889					case CHAT:
 890					case ONLINE:
 891						return R.drawable.ic_send_photo_online;
 892					case AWAY:
 893						return R.drawable.ic_send_photo_away;
 894					case XA:
 895					case DND:
 896						return R.drawable.ic_send_photo_dnd;
 897					default:
 898						return R.drawable.ic_send_photo_offline;
 899				}
 900			case RECORD_VOICE:
 901				switch (status) {
 902					case CHAT:
 903					case ONLINE:
 904						return R.drawable.ic_send_voice_online;
 905					case AWAY:
 906						return R.drawable.ic_send_voice_away;
 907					case XA:
 908					case DND:
 909						return R.drawable.ic_send_voice_dnd;
 910					default:
 911						return R.drawable.ic_send_voice_offline;
 912				}
 913			case SEND_LOCATION:
 914				switch (status) {
 915					case CHAT:
 916					case ONLINE:
 917						return R.drawable.ic_send_location_online;
 918					case AWAY:
 919						return R.drawable.ic_send_location_away;
 920					case XA:
 921					case DND:
 922						return R.drawable.ic_send_location_dnd;
 923					default:
 924						return R.drawable.ic_send_location_offline;
 925				}
 926			case CANCEL:
 927				switch (status) {
 928					case CHAT:
 929					case ONLINE:
 930						return R.drawable.ic_send_cancel_online;
 931					case AWAY:
 932						return R.drawable.ic_send_cancel_away;
 933					case XA:
 934					case DND:
 935						return R.drawable.ic_send_cancel_dnd;
 936					default:
 937						return R.drawable.ic_send_cancel_offline;
 938				}
 939			case CHOOSE_PICTURE:
 940				switch (status) {
 941					case CHAT:
 942					case ONLINE:
 943						return R.drawable.ic_send_picture_online;
 944					case AWAY:
 945						return R.drawable.ic_send_picture_away;
 946					case XA:
 947					case DND:
 948						return R.drawable.ic_send_picture_dnd;
 949					default:
 950						return R.drawable.ic_send_picture_offline;
 951				}
 952		}
 953		return R.drawable.ic_send_text_offline;
 954	}
 955
 956	public void updateSendButton() {
 957		final Conversation c = this.conversation;
 958		final SendButtonAction action;
 959		final Presence.Status status;
 960		final boolean empty = this.mEditMessage == null || this.mEditMessage.getText().length() == 0;
 961		final boolean conference = c.getMode() == Conversation.MODE_MULTI;
 962		if (conference && !c.getAccount().httpUploadAvailable()) {
 963			if (empty && c.getNextCounterpart() != null) {
 964				action = SendButtonAction.CANCEL;
 965			} else {
 966				action = SendButtonAction.TEXT;
 967			}
 968		} else {
 969			if (empty) {
 970				if (conference && c.getNextCounterpart() != null) {
 971					action = SendButtonAction.CANCEL;
 972				} else {
 973					String setting = activity.getPreferences().getString("quick_action", "recent");
 974					if (!setting.equals("none") && UIHelper.receivedLocationQuestion(conversation.getLatestMessage())) {
 975						setting = "location";
 976					} else if (setting.equals("recent")) {
 977						setting = activity.getPreferences().getString("recently_used_quick_action", "text");
 978					}
 979					switch (setting) {
 980						case "photo":
 981							action = SendButtonAction.TAKE_PHOTO;
 982							break;
 983						case "location":
 984							action = SendButtonAction.SEND_LOCATION;
 985							break;
 986						case "voice":
 987							action = SendButtonAction.RECORD_VOICE;
 988							break;
 989						case "picture":
 990							action = SendButtonAction.CHOOSE_PICTURE;
 991							break;
 992						default:
 993							action = SendButtonAction.TEXT;
 994							break;
 995					}
 996				}
 997			} else {
 998				action = SendButtonAction.TEXT;
 999			}
1000		}
1001		if (activity.useSendButtonToIndicateStatus() && c != null
1002				&& c.getAccount().getStatus() == Account.State.ONLINE) {
1003			if (c.getMode() == Conversation.MODE_SINGLE) {
1004				status = c.getContact().getMostAvailableStatus();
1005			} else {
1006				status = c.getMucOptions().online() ? Presence.Status.ONLINE : Presence.Status.OFFLINE;
1007			}
1008		} else {
1009			status = Presence.Status.OFFLINE;
1010		}
1011		this.mSendButton.setTag(action);
1012		this.mSendButton.setImageResource(getSendButtonImageResource(action, status));
1013	}
1014
1015	protected void updateStatusMessages() {
1016		synchronized (this.messageList) {
1017			if (conversation.getLastClearHistory() != 0) {
1018				this.messageList.add(0, Message.createLoadMoreMessage(conversation));
1019			}
1020			if (conversation.getMode() == Conversation.MODE_SINGLE) {
1021				ChatState state = conversation.getIncomingChatState();
1022				if (state == ChatState.COMPOSING) {
1023					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_is_typing, conversation.getName())));
1024				} else if (state == ChatState.PAUSED) {
1025					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_has_stopped_typing, conversation.getName())));
1026				} else {
1027					for (int i = this.messageList.size() - 1; i >= 0; --i) {
1028						if (this.messageList.get(i).getStatus() == Message.STATUS_RECEIVED) {
1029							return;
1030						} else {
1031							if (this.messageList.get(i).getStatus() == Message.STATUS_SEND_DISPLAYED) {
1032								this.messageList.add(i + 1,
1033										Message.createStatusMessage(conversation, getString(R.string.contact_has_read_up_to_this_point, conversation.getName())));
1034								return;
1035							}
1036						}
1037					}
1038				}
1039			}
1040		}
1041	}
1042
1043	protected void showSnackbar(final int message, final int action,
1044								final OnClickListener clickListener) {
1045		snackbar.setVisibility(View.VISIBLE);
1046		snackbar.setOnClickListener(null);
1047		snackbarMessage.setText(message);
1048		snackbarMessage.setOnClickListener(null);
1049		snackbarAction.setVisibility(View.VISIBLE);
1050		snackbarAction.setText(action);
1051		snackbarAction.setOnClickListener(clickListener);
1052	}
1053
1054	protected void hideSnackbar() {
1055		snackbar.setVisibility(View.GONE);
1056	}
1057
1058	protected void sendPlainTextMessage(Message message) {
1059		ConversationActivity activity = (ConversationActivity) getActivity();
1060		activity.xmppConnectionService.sendMessage(message);
1061		messageSent();
1062	}
1063
1064	protected void sendPgpMessage(final Message message) {
1065		final ConversationActivity activity = (ConversationActivity) getActivity();
1066		final XmppConnectionService xmppService = activity.xmppConnectionService;
1067		final Contact contact = message.getConversation().getContact();
1068		if (!activity.hasPgp()) {
1069			activity.showInstallPgpDialog();
1070			return;
1071		}
1072		if (conversation.getAccount().getPgpSignature() == null) {
1073			activity.announcePgp(conversation.getAccount(), conversation);
1074			return;
1075		}
1076		if (conversation.getMode() == Conversation.MODE_SINGLE) {
1077			if (contact.getPgpKeyId() != 0) {
1078				xmppService.getPgpEngine().hasKey(contact,
1079						new UiCallback<Contact>() {
1080
1081							@Override
1082							public void userInputRequried(PendingIntent pi,
1083														  Contact contact) {
1084								activity.runIntent(
1085										pi,
1086										ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
1087							}
1088
1089							@Override
1090							public void success(Contact contact) {
1091								messageSent();
1092								activity.encryptTextMessage(message);
1093							}
1094
1095							@Override
1096							public void error(int error, Contact contact) {
1097								System.out.println();
1098							}
1099						});
1100
1101			} else {
1102				showNoPGPKeyDialog(false,
1103						new DialogInterface.OnClickListener() {
1104
1105							@Override
1106							public void onClick(DialogInterface dialog,
1107												int which) {
1108								conversation
1109										.setNextEncryption(Message.ENCRYPTION_NONE);
1110								xmppService.databaseBackend
1111										.updateConversation(conversation);
1112								message.setEncryption(Message.ENCRYPTION_NONE);
1113								xmppService.sendMessage(message);
1114								messageSent();
1115							}
1116						});
1117			}
1118		} else {
1119			if (conversation.getMucOptions().pgpKeysInUse()) {
1120				if (!conversation.getMucOptions().everybodyHasKeys()) {
1121					Toast warning = Toast
1122							.makeText(getActivity(),
1123									R.string.missing_public_keys,
1124									Toast.LENGTH_LONG);
1125					warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
1126					warning.show();
1127				}
1128				activity.encryptTextMessage(message);
1129				messageSent();
1130			} else {
1131				showNoPGPKeyDialog(true,
1132						new DialogInterface.OnClickListener() {
1133
1134							@Override
1135							public void onClick(DialogInterface dialog,
1136												int which) {
1137								conversation
1138										.setNextEncryption(Message.ENCRYPTION_NONE);
1139								message.setEncryption(Message.ENCRYPTION_NONE);
1140								xmppService.databaseBackend
1141										.updateConversation(conversation);
1142								xmppService.sendMessage(message);
1143								messageSent();
1144							}
1145						});
1146			}
1147		}
1148	}
1149
1150	public void showNoPGPKeyDialog(boolean plural,
1151								   DialogInterface.OnClickListener listener) {
1152		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
1153		builder.setIconAttribute(android.R.attr.alertDialogIcon);
1154		if (plural) {
1155			builder.setTitle(getString(R.string.no_pgp_keys));
1156			builder.setMessage(getText(R.string.contacts_have_no_pgp_keys));
1157		} else {
1158			builder.setTitle(getString(R.string.no_pgp_key));
1159			builder.setMessage(getText(R.string.contact_has_no_pgp_key));
1160		}
1161		builder.setNegativeButton(getString(R.string.cancel), null);
1162		builder.setPositiveButton(getString(R.string.send_unencrypted),
1163				listener);
1164		builder.create().show();
1165	}
1166
1167	protected void sendAxolotlMessage(final Message message) {
1168		final ConversationActivity activity = (ConversationActivity) getActivity();
1169		final XmppConnectionService xmppService = activity.xmppConnectionService;
1170		xmppService.sendMessage(message);
1171		messageSent();
1172	}
1173
1174	protected void sendOtrMessage(final Message message) {
1175		final ConversationActivity activity = (ConversationActivity) getActivity();
1176		final XmppConnectionService xmppService = activity.xmppConnectionService;
1177		activity.selectPresence(message.getConversation(),
1178				new OnPresenceSelected() {
1179
1180					@Override
1181					public void onPresenceSelected() {
1182						message.setCounterpart(conversation.getNextCounterpart());
1183						xmppService.sendMessage(message);
1184						messageSent();
1185					}
1186				});
1187	}
1188
1189	public void appendText(String text) {
1190		if (text == null) {
1191			return;
1192		}
1193		String previous = this.mEditMessage.getText().toString();
1194		if (previous.length() != 0 && !previous.endsWith(" ")) {
1195			text = " " + text;
1196		}
1197		this.mEditMessage.append(text);
1198	}
1199
1200	@Override
1201	public boolean onEnterPressed() {
1202		if (activity.enterIsSend()) {
1203			sendMessage();
1204			return true;
1205		} else {
1206			return false;
1207		}
1208	}
1209
1210	@Override
1211	public void onTypingStarted() {
1212		Account.State status = conversation.getAccount().getStatus();
1213		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.COMPOSING)) {
1214			activity.xmppConnectionService.sendChatState(conversation);
1215		}
1216		activity.hideConversationsOverview();
1217		updateSendButton();
1218	}
1219
1220	@Override
1221	public void onTypingStopped() {
1222		Account.State status = conversation.getAccount().getStatus();
1223		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.PAUSED)) {
1224			activity.xmppConnectionService.sendChatState(conversation);
1225		}
1226	}
1227
1228	@Override
1229	public void onTextDeleted() {
1230		Account.State status = conversation.getAccount().getStatus();
1231		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
1232			activity.xmppConnectionService.sendChatState(conversation);
1233		}
1234		updateSendButton();
1235	}
1236
1237	private int completionIndex = 0;
1238	private int lastCompletionLength = 0;
1239	private String incomplete;
1240	private int lastCompletionCursor;
1241	private boolean firstWord = false;
1242
1243	@Override
1244	public boolean onTabPressed(boolean repeated) {
1245		if (conversation == null || conversation.getMode() == Conversation.MODE_SINGLE) {
1246			return false;
1247		}
1248		if (repeated) {
1249			completionIndex++;
1250		} else {
1251			lastCompletionLength = 0;
1252			completionIndex = 0;
1253			final String content = mEditMessage.getText().toString();
1254			lastCompletionCursor = mEditMessage.getSelectionEnd();
1255			int start = lastCompletionCursor > 0 ? content.lastIndexOf(" ",lastCompletionCursor-1) + 1 : 0;
1256			firstWord = start == 0;
1257			incomplete = content.substring(start,lastCompletionCursor);
1258		}
1259		List<String> completions = new ArrayList<>();
1260		for(MucOptions.User user : conversation.getMucOptions().getUsers()) {
1261			if (user.getName().startsWith(incomplete)) {
1262				completions.add(user.getName()+(firstWord ? ": " : " "));
1263			}
1264		}
1265		Collections.sort(completions);
1266		if (completions.size() > completionIndex) {
1267			String completion = completions.get(completionIndex).substring(incomplete.length());
1268			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
1269			mEditMessage.getEditableText().insert(lastCompletionCursor, completion);
1270			lastCompletionLength = completion.length();
1271		} else {
1272			completionIndex = -1;
1273			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
1274			lastCompletionLength = 0;
1275		}
1276		return true;
1277	}
1278
1279	@Override
1280	public void onActivityResult(int requestCode, int resultCode,
1281	                                final Intent data) {
1282		if (resultCode == Activity.RESULT_OK) {
1283			if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
1284				activity.getSelectedConversation().getAccount().getPgpDecryptionService().onKeychainUnlocked();
1285				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
1286				updatePgpMessages();
1287			} else if (requestCode == ConversationActivity.REQUEST_TRUST_KEYS_TEXT) {
1288				final String body = mEditMessage.getText().toString();
1289				Message message = new Message(conversation, body, conversation.getNextEncryption());
1290				sendAxolotlMessage(message);
1291			} else if (requestCode == ConversationActivity.REQUEST_TRUST_KEYS_MENU) {
1292				int choice = data.getIntExtra("choice", ConversationActivity.ATTACHMENT_CHOICE_INVALID);
1293				activity.selectPresenceToAttachFile(choice, conversation.getNextEncryption());
1294			}
1295		} else {
1296			if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
1297				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
1298				updatePgpMessages();
1299			}
1300		}
1301	}
1302
1303}