1package eu.siacs.conversations.ui;
  2
  3import android.app.AlertDialog;
  4import android.app.Fragment;
  5import android.app.PendingIntent;
  6import android.content.Context;
  7import android.content.DialogInterface;
  8import android.content.Intent;
  9import android.content.IntentSender;
 10import android.content.IntentSender.SendIntentException;
 11import android.os.Bundle;
 12import android.view.ContextMenu;
 13import android.view.ContextMenu.ContextMenuInfo;
 14import android.view.Gravity;
 15import android.view.KeyEvent;
 16import android.view.LayoutInflater;
 17import android.view.MenuItem;
 18import android.view.View;
 19import android.view.View.OnClickListener;
 20import android.view.ViewGroup;
 21import android.view.inputmethod.EditorInfo;
 22import android.view.inputmethod.InputMethodManager;
 23import android.widget.AbsListView;
 24import android.widget.AbsListView.OnScrollListener;
 25import android.widget.AdapterView;
 26import android.widget.AdapterView.AdapterContextMenuInfo;
 27import android.widget.ImageButton;
 28import android.widget.ListView;
 29import android.widget.RelativeLayout;
 30import android.widget.TextView;
 31import android.widget.TextView.OnEditorActionListener;
 32import android.widget.Toast;
 33
 34import net.java.otr4j.session.SessionStatus;
 35
 36import java.util.ArrayList;
 37import java.util.List;
 38import java.util.Set;
 39import java.util.concurrent.ConcurrentLinkedQueue;
 40
 41import eu.siacs.conversations.R;
 42import eu.siacs.conversations.crypto.PgpEngine;
 43import eu.siacs.conversations.entities.Account;
 44import eu.siacs.conversations.entities.Contact;
 45import eu.siacs.conversations.entities.Conversation;
 46import eu.siacs.conversations.entities.Message;
 47import eu.siacs.conversations.entities.MucOptions;
 48import eu.siacs.conversations.entities.Presences;
 49import eu.siacs.conversations.services.XmppConnectionService;
 50import eu.siacs.conversations.ui.EditMessage.OnEnterPressed;
 51import eu.siacs.conversations.ui.XmppActivity.OnPresenceSelected;
 52import eu.siacs.conversations.ui.XmppActivity.OnValueEdited;
 53import eu.siacs.conversations.ui.adapter.MessageAdapter;
 54import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureClicked;
 55import eu.siacs.conversations.ui.adapter.MessageAdapter.OnContactPictureLongClicked;
 56import eu.siacs.conversations.utils.UIHelper;
 57import eu.siacs.conversations.xmpp.jid.Jid;
 58
 59public class ConversationFragment extends Fragment {
 60
 61	protected Conversation conversation;
 62	private OnClickListener leaveMuc = new OnClickListener() {
 63
 64		@Override
 65		public void onClick(View v) {
 66			activity.endConversation(conversation);
 67		}
 68	};
 69	private OnClickListener joinMuc = new OnClickListener() {
 70
 71		@Override
 72		public void onClick(View v) {
 73			activity.xmppConnectionService.joinMuc(conversation);
 74		}
 75	};
 76	private OnClickListener enterPassword = new OnClickListener() {
 77
 78		@Override
 79		public void onClick(View v) {
 80			MucOptions muc = conversation.getMucOptions();
 81			String password = muc.getPassword();
 82			if (password == null) {
 83				password = "";
 84			}
 85			activity.quickPasswordEdit(password, new OnValueEdited() {
 86
 87				@Override
 88				public void onValueEdited(String value) {
 89					activity.xmppConnectionService.providePasswordForMuc(
 90							conversation, value);
 91				}
 92			});
 93		}
 94	};
 95	protected ListView messagesView;
 96	protected List<Message> messageList = new ArrayList<>();
 97	protected MessageAdapter messageListAdapter;
 98	protected Contact contact;
 99	private EditMessage mEditMessage;
100	private ImageButton mSendButton;
101	private RelativeLayout snackbar;
102	private TextView snackbarMessage;
103	private TextView snackbarAction;
104	private boolean messagesLoaded = false;
105	private OnScrollListener mOnScrollListener = new OnScrollListener() {
106
107		@Override
108		public void onScrollStateChanged(AbsListView view, int scrollState) {
109			// TODO Auto-generated method stub
110
111		}
112
113		@Override
114		public void onScroll(AbsListView view, int firstVisibleItem,
115							 int visibleItemCount, int totalItemCount) {
116			if (firstVisibleItem == 0 && messagesLoaded) {
117				long timestamp = messageList.get(0).getTimeSent();
118				messagesLoaded = false;
119				int size = activity.xmppConnectionService.loadMoreMessages(
120						conversation, timestamp);
121				messageList.clear();
122				messageList.addAll(conversation.getMessages());
123				updateStatusMessages();
124				messageListAdapter.notifyDataSetChanged();
125				if (size != 0) {
126					messagesLoaded = true;
127				}
128				messagesView.setSelectionFromTop(size + 1, 0);
129			}
130		}
131	};
132	private IntentSender askForPassphraseIntent = null;
133	protected OnClickListener clickToDecryptListener = new OnClickListener() {
134
135		@Override
136		public void onClick(View v) {
137			if (activity.hasPgp() && askForPassphraseIntent != null) {
138				try {
139					getActivity().startIntentSenderForResult(
140							askForPassphraseIntent,
141							ConversationActivity.REQUEST_DECRYPT_PGP, null, 0,
142							0, 0);
143				} catch (SendIntentException e) {
144					//
145				}
146			}
147		}
148	};
149	private ConcurrentLinkedQueue<Message> mEncryptedMessages = new ConcurrentLinkedQueue<>();
150	private boolean mDecryptJobRunning = false;
151	private OnEditorActionListener mEditorActionListener = new OnEditorActionListener() {
152
153		@Override
154		public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
155			if (actionId == EditorInfo.IME_ACTION_SEND) {
156				InputMethodManager imm = (InputMethodManager) v.getContext()
157						.getSystemService(Context.INPUT_METHOD_SERVICE);
158				imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
159				sendMessage();
160				return true;
161			} else {
162				return false;
163			}
164		}
165	};
166	private OnClickListener mSendButtonListener = new OnClickListener() {
167
168		@Override
169		public void onClick(View v) {
170			sendMessage();
171		}
172	};
173	private OnClickListener clickToMuc = new OnClickListener() {
174
175		@Override
176		public void onClick(View v) {
177			Intent intent = new Intent(getActivity(),
178					ConferenceDetailsActivity.class);
179			intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
180			intent.putExtra("uuid", conversation.getUuid());
181			startActivity(intent);
182		}
183	};
184	private ConversationActivity activity;
185	private Message selectedMessage;
186
187	private void sendMessage() {
188		if (this.conversation == null) {
189			return;
190		}
191		if (mEditMessage.getText().length() < 1) {
192			if (this.conversation.getMode() == Conversation.MODE_MULTI) {
193				conversation.setNextCounterpart(null);
194				updateChatMsgHint();
195			}
196			return;
197		}
198		Message message = new Message(conversation, mEditMessage.getText()
199				.toString(), conversation.getNextEncryption(activity
200				.forceEncryption()));
201		if (conversation.getMode() == Conversation.MODE_MULTI) {
202			if (conversation.getNextCounterpart() != null) {
203				message.setCounterpart(conversation.getNextCounterpart());
204				message.setType(Message.TYPE_PRIVATE);
205				conversation.setNextCounterpart(null);
206			}
207		}
208		if (conversation.getNextEncryption(activity.forceEncryption()) == Message.ENCRYPTION_OTR) {
209			sendOtrMessage(message);
210		} else if (conversation.getNextEncryption(activity.forceEncryption()) == Message.ENCRYPTION_PGP) {
211			sendPgpMessage(message);
212		} else {
213			sendPlainTextMessage(message);
214		}
215	}
216
217	public void updateChatMsgHint() {
218		if (conversation.getMode() == Conversation.MODE_MULTI
219				&& conversation.getNextCounterpart() != null) {
220			this.mEditMessage.setHint(getString(
221					R.string.send_private_message_to,
222					conversation.getNextCounterpart().getResourcepart()));
223		} else {
224			switch (conversation.getNextEncryption(activity.forceEncryption())) {
225				case Message.ENCRYPTION_NONE:
226					mEditMessage
227							.setHint(getString(R.string.send_plain_text_message));
228					break;
229				case Message.ENCRYPTION_OTR:
230					mEditMessage.setHint(getString(R.string.send_otr_message));
231					break;
232				case Message.ENCRYPTION_PGP:
233					mEditMessage.setHint(getString(R.string.send_pgp_message));
234					break;
235				default:
236					break;
237			}
238		}
239	}
240
241	@Override
242	public View onCreateView(final LayoutInflater inflater,
243							 ViewGroup container, Bundle savedInstanceState) {
244		final View view = inflater.inflate(R.layout.fragment_conversation,
245				container, false);
246		mEditMessage = (EditMessage) view.findViewById(R.id.textinput);
247		mEditMessage.setOnClickListener(new OnClickListener() {
248
249			@Override
250			public void onClick(View v) {
251				activity.hideConversationsOverview();
252			}
253		});
254		mEditMessage.setOnEditorActionListener(mEditorActionListener);
255		mEditMessage.setOnEnterPressedListener(new OnEnterPressed() {
256
257			@Override
258			public void onEnterPressed() {
259				sendMessage();
260			}
261		});
262
263		mSendButton = (ImageButton) view.findViewById(R.id.textSendButton);
264		mSendButton.setOnClickListener(this.mSendButtonListener);
265
266		snackbar = (RelativeLayout) view.findViewById(R.id.snackbar);
267		snackbarMessage = (TextView) view.findViewById(R.id.snackbar_message);
268		snackbarAction = (TextView) view.findViewById(R.id.snackbar_action);
269
270		messagesView = (ListView) view.findViewById(R.id.messages_view);
271		messagesView.setOnScrollListener(mOnScrollListener);
272		messagesView.setTranscriptMode(ListView.TRANSCRIPT_MODE_NORMAL);
273		messageListAdapter = new MessageAdapter(
274				(ConversationActivity) getActivity(), this.messageList);
275		messageListAdapter
276				.setOnContactPictureClicked(new OnContactPictureClicked() {
277
278					@Override
279					public void onContactPictureClicked(Message message) {
280						if (message.getStatus() <= Message.STATUS_RECEIVED) {
281							if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
282								if (message.getCounterpart() != null) {
283									highlightInConference(message.getCounterpart().getResourcepart());
284								} else {
285									highlightInConference(message
286											.getContact().getDisplayName());
287								}
288							} else {
289								Contact contact = message.getConversation()
290										.getContact();
291								if (contact.showInRoster()) {
292									activity.switchToContactDetails(contact);
293								} else {
294									activity.showAddToRosterDialog(message
295											.getConversation());
296								}
297							}
298						}  else {
299							Account account = message.getConversation().getAccount();
300							Intent intent = new Intent(activity, EditAccountActivity.class);
301							intent.putExtra("jid", account.getJid().toBareJid().toString());
302							startActivity(intent);
303						}
304					}
305				});
306		messageListAdapter
307				.setOnContactPictureLongClicked(new OnContactPictureLongClicked() {
308
309					@Override
310					public void onContactPictureLongClicked(Message message) {
311						if (message.getStatus() <= Message.STATUS_RECEIVED) {
312							if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
313								if (message.getCounterpart() != null) {
314									privateMessageWith(message.getCounterpart());
315								}
316							}
317						}
318					}
319				});
320		messagesView.setAdapter(messageListAdapter);
321
322		registerForContextMenu(messagesView);
323
324		return view;
325	}
326
327	@Override
328	public void onCreateContextMenu(ContextMenu menu, View v,
329									ContextMenuInfo menuInfo) {
330		super.onCreateContextMenu(menu, v, menuInfo);
331		AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
332		this.selectedMessage = this.messageList.get(acmi.position);
333		populateContextMenu(menu);
334	}
335
336	private void populateContextMenu(ContextMenu menu) {
337		if (this.selectedMessage.getType() != Message.TYPE_STATUS) {
338			activity.getMenuInflater().inflate(R.menu.message_context, menu);
339			menu.setHeaderTitle(R.string.message_options);
340			MenuItem copyText = menu.findItem(R.id.copy_text);
341			MenuItem shareImage = menu.findItem(R.id.share_image);
342			MenuItem sendAgain = menu.findItem(R.id.send_again);
343			MenuItem copyUrl = menu.findItem(R.id.copy_url);
344			MenuItem downloadImage = menu.findItem(R.id.download_image);
345			if (this.selectedMessage.getType() != Message.TYPE_TEXT
346					|| this.selectedMessage.getDownloadable() != null) {
347				copyText.setVisible(false);
348			}
349			if (this.selectedMessage.getType() != Message.TYPE_IMAGE
350					|| this.selectedMessage.getDownloadable() != null) {
351				shareImage.setVisible(false);
352			}
353			if (this.selectedMessage.getStatus() != Message.STATUS_SEND_FAILED) {
354				sendAgain.setVisible(false);
355			}
356			if ((this.selectedMessage.getType() != Message.TYPE_IMAGE && this.selectedMessage
357					.getDownloadable() == null)
358					|| this.selectedMessage.getImageParams().url == null) {
359				copyUrl.setVisible(false);
360			}
361
362			if (this.selectedMessage.getType() != Message.TYPE_TEXT
363					|| this.selectedMessage.getDownloadable() != null
364					|| !this.selectedMessage.bodyContainsDownloadable()) {
365				downloadImage.setVisible(false);
366			}
367		}
368	}
369
370	@Override
371	public boolean onContextItemSelected(MenuItem item) {
372		switch (item.getItemId()) {
373			case R.id.share_image:
374				shareImage(selectedMessage);
375				return true;
376			case R.id.copy_text:
377				copyText(selectedMessage);
378				return true;
379			case R.id.send_again:
380				resendMessage(selectedMessage);
381				return true;
382			case R.id.copy_url:
383				copyUrl(selectedMessage);
384				return true;
385			case R.id.download_image:
386				downloadImage(selectedMessage);
387				return true;
388			default:
389				return super.onContextItemSelected(item);
390		}
391	}
392
393	private void shareImage(Message message) {
394		Intent shareIntent = new Intent();
395		shareIntent.setAction(Intent.ACTION_SEND);
396		shareIntent.putExtra(Intent.EXTRA_STREAM,
397				activity.xmppConnectionService.getFileBackend()
398						.getJingleFileUri(message));
399		shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
400		shareIntent.setType("image/webp");
401		activity.startActivity(Intent.createChooser(shareIntent,
402				getText(R.string.share_with)));
403	}
404
405	private void copyText(Message message) {
406		if (activity.copyTextToClipboard(message.getMergedBody(),
407				R.string.message_text)) {
408			Toast.makeText(activity, R.string.message_copied_to_clipboard,
409					Toast.LENGTH_SHORT).show();
410		}
411	}
412
413	private void resendMessage(Message message) {
414		activity.xmppConnectionService.resendFailedMessages(message);
415	}
416
417	private void copyUrl(Message message) {
418		if (activity.copyTextToClipboard(
419				message.getImageParams().url.toString(), R.string.image_url)) {
420			Toast.makeText(activity, R.string.url_copied_to_clipboard,
421					Toast.LENGTH_SHORT).show();
422		}
423	}
424
425	private void downloadImage(Message message) {
426		activity.xmppConnectionService.getHttpConnectionManager()
427				.createNewConnection(message);
428	}
429
430	protected void privateMessageWith(final Jid counterpart) {
431		this.mEditMessage.setText("");
432		this.conversation.setNextCounterpart(counterpart);
433		updateChatMsgHint();
434	}
435
436	protected void highlightInConference(String nick) {
437		String oldString = mEditMessage.getText().toString().trim();
438		if (oldString.isEmpty() || mEditMessage.getSelectionStart() == 0) {
439			mEditMessage.getText().insert(0, nick + ": ");
440		} else {
441			if (mEditMessage.getText().charAt(
442					mEditMessage.getSelectionStart() - 1) != ' ') {
443				nick = " " + nick;
444			}
445			mEditMessage.getText().insert(mEditMessage.getSelectionStart(),
446					nick + " ");
447		}
448	}
449
450	@Override
451	public void onStop() {
452		mDecryptJobRunning = false;
453		super.onStop();
454		if (this.conversation != null) {
455			this.conversation.setNextMessage(mEditMessage.getText().toString());
456		}
457	}
458
459	public void reInit(Conversation conversation) {
460		if (this.conversation != null) {
461			this.conversation.setNextMessage(mEditMessage.getText().toString());
462		}
463		this.activity = (ConversationActivity) getActivity();
464		this.conversation = conversation;
465		if (this.conversation.getMode() == Conversation.MODE_MULTI) {
466			this.conversation.setNextCounterpart(null);
467		}
468		this.mEditMessage.setText("");
469		this.mEditMessage.append(this.conversation.getNextMessage());
470		this.messagesView.invalidate();
471		updateMessages();
472	}
473
474	public void updateMessages() {
475		if (getView() == null) {
476			return;
477		}
478		hideSnackbar();
479		final ConversationActivity activity = (ConversationActivity) getActivity();
480		if (this.conversation != null) {
481			final Contact contact = this.conversation.getContact();
482			if (this.conversation.isMuted()) {
483				showSnackbar(R.string.notifications_disabled, R.string.enable,
484						new OnClickListener() {
485
486							@Override
487							public void onClick(View v) {
488								conversation.setMutedTill(0);
489								activity.xmppConnectionService.databaseBackend
490										.updateConversation(conversation);
491								updateMessages();
492							}
493						});
494			} else if (!contact.showInRoster()
495					&& contact
496					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
497				showSnackbar(R.string.contact_added_you, R.string.add_back,
498						new OnClickListener() {
499
500							@Override
501							public void onClick(View v) {
502								activity.xmppConnectionService
503										.createContact(contact);
504								activity.switchToContactDetails(contact);
505							}
506						});
507			}
508			for (Message message : this.conversation.getMessages()) {
509				if (message.getEncryption() == Message.ENCRYPTION_PGP
510						&& (message.getStatus() == Message.STATUS_RECEIVED || message
511						.getStatus() >= Message.STATUS_SEND)
512						&& message.getDownloadable() == null) {
513					if (!mEncryptedMessages.contains(message)) {
514						mEncryptedMessages.add(message);
515					}
516				}
517			}
518			decryptNext();
519			this.messageList.clear();
520			if (this.conversation.getMessages().size() == 0) {
521				messagesLoaded = false;
522			} else {
523				this.messageList.addAll(this.conversation.getMessages());
524				messagesLoaded = true;
525				updateStatusMessages();
526			}
527			this.messageListAdapter.notifyDataSetChanged();
528			if (conversation.getMode() == Conversation.MODE_SINGLE) {
529				if (messageList.size() >= 1) {
530					makeFingerprintWarning();
531				}
532			} else {
533				if (!conversation.getMucOptions().online()
534						&& conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
535					int error = conversation.getMucOptions().getError();
536					switch (error) {
537						case MucOptions.ERROR_NICK_IN_USE:
538							showSnackbar(R.string.nick_in_use, R.string.edit,
539									clickToMuc);
540							break;
541						case MucOptions.ERROR_ROOM_NOT_FOUND:
542							showSnackbar(R.string.conference_not_found,
543									R.string.leave, leaveMuc);
544							break;
545						case MucOptions.ERROR_PASSWORD_REQUIRED:
546							showSnackbar(R.string.conference_requires_password,
547									R.string.enter_password, enterPassword);
548							break;
549						case MucOptions.ERROR_BANNED:
550							showSnackbar(R.string.conference_banned,
551									R.string.leave, leaveMuc);
552							break;
553						case MucOptions.ERROR_MEMBERS_ONLY:
554							showSnackbar(R.string.conference_members_only,
555									R.string.leave, leaveMuc);
556							break;
557						case MucOptions.KICKED_FROM_ROOM:
558							showSnackbar(R.string.conference_kicked, R.string.join,
559									joinMuc);
560							break;
561						default:
562							break;
563					}
564				}
565			}
566			updateChatMsgHint();
567			if (!activity.isConversationsOverviewVisable() || !activity.isConversationsOverviewHideable()) {
568				activity.xmppConnectionService.markRead(conversation, true);
569				activity.updateConversationList();
570			}
571			this.updateSendButton();
572		}
573	}
574
575	private void decryptNext() {
576		Message next = this.mEncryptedMessages.peek();
577		PgpEngine engine = activity.xmppConnectionService.getPgpEngine();
578
579		if (next != null && engine != null && !mDecryptJobRunning) {
580			mDecryptJobRunning = true;
581			engine.decrypt(next, new UiCallback<Message>() {
582
583				@Override
584				public void userInputRequried(PendingIntent pi, Message message) {
585					mDecryptJobRunning = false;
586					askForPassphraseIntent = pi.getIntentSender();
587					showSnackbar(R.string.openpgp_messages_found,
588							R.string.decrypt, clickToDecryptListener);
589				}
590
591				@Override
592				public void success(Message message) {
593					mDecryptJobRunning = false;
594					mEncryptedMessages.remove();
595					activity.xmppConnectionService.updateMessage(message);
596				}
597
598				@Override
599				public void error(int error, Message message) {
600					message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
601					mDecryptJobRunning = false;
602					mEncryptedMessages.remove();
603					activity.xmppConnectionService.updateConversationUi();
604				}
605			});
606		}
607	}
608
609	private void messageSent() {
610		int size = this.messageList.size();
611		messagesView.setSelection(size - 1);
612		mEditMessage.setText("");
613		updateChatMsgHint();
614	}
615
616	public void updateSendButton() {
617		Conversation c = this.conversation;
618		if (activity.useSendButtonToIndicateStatus() && c != null
619				&& c.getAccount().getStatus() == Account.STATUS_ONLINE) {
620			if (c.getMode() == Conversation.MODE_SINGLE) {
621				switch (c.getContact().getMostAvailableStatus()) {
622					case Presences.CHAT:
623						this.mSendButton
624								.setImageResource(R.drawable.ic_action_send_now_online);
625						break;
626					case Presences.ONLINE:
627						this.mSendButton
628								.setImageResource(R.drawable.ic_action_send_now_online);
629						break;
630					case Presences.AWAY:
631						this.mSendButton
632								.setImageResource(R.drawable.ic_action_send_now_away);
633						break;
634					case Presences.XA:
635						this.mSendButton
636								.setImageResource(R.drawable.ic_action_send_now_away);
637						break;
638					case Presences.DND:
639						this.mSendButton
640								.setImageResource(R.drawable.ic_action_send_now_dnd);
641						break;
642					default:
643						this.mSendButton
644								.setImageResource(R.drawable.ic_action_send_now_offline);
645						break;
646				}
647			} else if (c.getMode() == Conversation.MODE_MULTI) {
648				if (c.getMucOptions().online()) {
649					this.mSendButton
650							.setImageResource(R.drawable.ic_action_send_now_online);
651				} else {
652					this.mSendButton
653							.setImageResource(R.drawable.ic_action_send_now_offline);
654				}
655			} else {
656				this.mSendButton
657						.setImageResource(R.drawable.ic_action_send_now_offline);
658			}
659		} else {
660			this.mSendButton
661					.setImageResource(R.drawable.ic_action_send_now_offline);
662		}
663	}
664
665	protected void updateStatusMessages() {
666		if (conversation.getMode() == Conversation.MODE_SINGLE) {
667			for (int i = this.messageList.size() - 1; i >= 0; --i) {
668				if (this.messageList.get(i).getStatus() == Message.STATUS_RECEIVED) {
669					return;
670				} else {
671					if (this.messageList.get(i).getStatus() == Message.STATUS_SEND_DISPLAYED) {
672						this.messageList.add(i + 1,
673								Message.createStatusMessage(conversation));
674						return;
675					}
676				}
677			}
678		}
679	}
680
681	protected void makeFingerprintWarning() {
682		Set<String> knownFingerprints = conversation.getContact()
683				.getOtrFingerprints();
684		if (conversation.hasValidOtrSession()
685				&& (!conversation.isMuted())
686				&& (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) && (!knownFingerprints
687				.contains(conversation.getOtrFingerprint()))) {
688			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify,
689					new OnClickListener() {
690
691						@Override
692						public void onClick(View v) {
693							if (conversation.getOtrFingerprint() != null) {
694								AlertDialog dialog = UIHelper
695										.getVerifyFingerprintDialog(
696												(ConversationActivity) getActivity(),
697												conversation, snackbar);
698								dialog.show();
699							}
700						}
701					});
702		}
703	}
704
705	protected void showSnackbar(int message, int action,
706								OnClickListener clickListener) {
707		snackbar.setVisibility(View.VISIBLE);
708		snackbar.setOnClickListener(null);
709		snackbarMessage.setText(message);
710		snackbarMessage.setOnClickListener(null);
711		snackbarAction.setText(action);
712		snackbarAction.setOnClickListener(clickListener);
713	}
714
715	protected void hideSnackbar() {
716		snackbar.setVisibility(View.GONE);
717	}
718
719	protected void sendPlainTextMessage(Message message) {
720		ConversationActivity activity = (ConversationActivity) getActivity();
721		activity.xmppConnectionService.sendMessage(message);
722		messageSent();
723	}
724
725	protected void sendPgpMessage(final Message message) {
726		final ConversationActivity activity = (ConversationActivity) getActivity();
727		final XmppConnectionService xmppService = activity.xmppConnectionService;
728		final Contact contact = message.getConversation().getContact();
729		if (activity.hasPgp()) {
730			if (conversation.getMode() == Conversation.MODE_SINGLE) {
731				if (contact.getPgpKeyId() != 0) {
732					xmppService.getPgpEngine().hasKey(contact,
733							new UiCallback<Contact>() {
734
735								@Override
736								public void userInputRequried(PendingIntent pi,
737															  Contact contact) {
738									activity.runIntent(
739											pi,
740											ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
741								}
742
743								@Override
744								public void success(Contact contact) {
745									messageSent();
746									activity.encryptTextMessage(message);
747								}
748
749								@Override
750								public void error(int error, Contact contact) {
751
752								}
753							});
754
755				} else {
756					showNoPGPKeyDialog(false,
757							new DialogInterface.OnClickListener() {
758
759								@Override
760								public void onClick(DialogInterface dialog,
761													int which) {
762									conversation
763											.setNextEncryption(Message.ENCRYPTION_NONE);
764									xmppService.databaseBackend
765											.updateConversation(conversation);
766									message.setEncryption(Message.ENCRYPTION_NONE);
767									xmppService.sendMessage(message);
768									messageSent();
769								}
770							});
771				}
772			} else {
773				if (conversation.getMucOptions().pgpKeysInUse()) {
774					if (!conversation.getMucOptions().everybodyHasKeys()) {
775						Toast warning = Toast
776								.makeText(getActivity(),
777										R.string.missing_public_keys,
778										Toast.LENGTH_LONG);
779						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
780						warning.show();
781					}
782					activity.encryptTextMessage(message);
783					messageSent();
784				} else {
785					showNoPGPKeyDialog(true,
786							new DialogInterface.OnClickListener() {
787
788								@Override
789								public void onClick(DialogInterface dialog,
790													int which) {
791									conversation
792											.setNextEncryption(Message.ENCRYPTION_NONE);
793									message.setEncryption(Message.ENCRYPTION_NONE);
794									xmppService.databaseBackend
795											.updateConversation(conversation);
796									xmppService.sendMessage(message);
797									messageSent();
798								}
799							});
800				}
801			}
802		} else {
803			activity.showInstallPgpDialog();
804		}
805	}
806
807	public void showNoPGPKeyDialog(boolean plural,
808								   DialogInterface.OnClickListener listener) {
809		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
810		builder.setIconAttribute(android.R.attr.alertDialogIcon);
811		if (plural) {
812			builder.setTitle(getString(R.string.no_pgp_keys));
813			builder.setMessage(getText(R.string.contacts_have_no_pgp_keys));
814		} else {
815			builder.setTitle(getString(R.string.no_pgp_key));
816			builder.setMessage(getText(R.string.contact_has_no_pgp_key));
817		}
818		builder.setNegativeButton(getString(R.string.cancel), null);
819		builder.setPositiveButton(getString(R.string.send_unencrypted),
820				listener);
821		builder.create().show();
822	}
823
824	protected void sendOtrMessage(final Message message) {
825		final ConversationActivity activity = (ConversationActivity) getActivity();
826		final XmppConnectionService xmppService = activity.xmppConnectionService;
827		if (conversation.hasValidOtrSession()) {
828			activity.xmppConnectionService.sendMessage(message);
829			messageSent();
830		} else {
831			activity.selectPresence(message.getConversation(),
832					new OnPresenceSelected() {
833
834						@Override
835						public void onPresenceSelected() {
836							message.setCounterpart(conversation.getNextCounterpart());
837							xmppService.sendMessage(message);
838							messageSent();
839						}
840					});
841		}
842	}
843
844	public void appendText(String text) {
845		String previous = this.mEditMessage.getText().toString();
846		if (previous.length() != 0 && !previous.endsWith(" ")) {
847			text = " " + text;
848		}
849		this.mEditMessage.append(text);
850	}
851
852	public void clearInputField() {
853		this.mEditMessage.setText("");
854	}
855}