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									if (!message.getCounterpart().isBareJid()) {
284										highlightInConference(message.getCounterpart().getResourcepart());
285									} else {
286										highlightInConference(message.getCounterpart().toString());
287									}
288								}
289							} else {
290								Contact contact = message.getConversation()
291										.getContact();
292								if (contact.showInRoster()) {
293									activity.switchToContactDetails(contact);
294								} else {
295									activity.showAddToRosterDialog(message
296											.getConversation());
297								}
298							}
299						}  else {
300							Account account = message.getConversation().getAccount();
301							Intent intent = new Intent(activity, EditAccountActivity.class);
302							intent.putExtra("jid", account.getJid().toBareJid().toString());
303							startActivity(intent);
304						}
305					}
306				});
307		messageListAdapter
308				.setOnContactPictureLongClicked(new OnContactPictureLongClicked() {
309
310					@Override
311					public void onContactPictureLongClicked(Message message) {
312						if (message.getStatus() <= Message.STATUS_RECEIVED) {
313							if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
314								if (message.getCounterpart() != null) {
315									privateMessageWith(message.getCounterpart());
316								}
317							}
318						}
319					}
320				});
321		messagesView.setAdapter(messageListAdapter);
322
323		registerForContextMenu(messagesView);
324
325		return view;
326	}
327
328	@Override
329	public void onCreateContextMenu(ContextMenu menu, View v,
330									ContextMenuInfo menuInfo) {
331		super.onCreateContextMenu(menu, v, menuInfo);
332		AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
333		this.selectedMessage = this.messageList.get(acmi.position);
334		populateContextMenu(menu);
335	}
336
337	private void populateContextMenu(ContextMenu menu) {
338		if (this.selectedMessage.getType() != Message.TYPE_STATUS) {
339			activity.getMenuInflater().inflate(R.menu.message_context, menu);
340			menu.setHeaderTitle(R.string.message_options);
341			MenuItem copyText = menu.findItem(R.id.copy_text);
342			MenuItem shareImage = menu.findItem(R.id.share_image);
343			MenuItem sendAgain = menu.findItem(R.id.send_again);
344			MenuItem copyUrl = menu.findItem(R.id.copy_url);
345			MenuItem downloadImage = menu.findItem(R.id.download_image);
346			if (this.selectedMessage.getType() != Message.TYPE_TEXT
347					|| this.selectedMessage.getDownloadable() != null) {
348				copyText.setVisible(false);
349			}
350			if (this.selectedMessage.getType() != Message.TYPE_IMAGE
351					|| this.selectedMessage.getDownloadable() != null) {
352				shareImage.setVisible(false);
353			}
354			if (this.selectedMessage.getStatus() != Message.STATUS_SEND_FAILED) {
355				sendAgain.setVisible(false);
356			}
357			if ((this.selectedMessage.getType() != Message.TYPE_IMAGE && this.selectedMessage
358					.getDownloadable() == null)
359					|| this.selectedMessage.getImageParams().url == null) {
360				copyUrl.setVisible(false);
361			}
362
363			if (this.selectedMessage.getType() != Message.TYPE_TEXT
364					|| this.selectedMessage.getDownloadable() != null
365					|| !this.selectedMessage.bodyContainsDownloadable()) {
366				downloadImage.setVisible(false);
367			}
368		}
369	}
370
371	@Override
372	public boolean onContextItemSelected(MenuItem item) {
373		switch (item.getItemId()) {
374			case R.id.share_image:
375				shareImage(selectedMessage);
376				return true;
377			case R.id.copy_text:
378				copyText(selectedMessage);
379				return true;
380			case R.id.send_again:
381				resendMessage(selectedMessage);
382				return true;
383			case R.id.copy_url:
384				copyUrl(selectedMessage);
385				return true;
386			case R.id.download_image:
387				downloadImage(selectedMessage);
388				return true;
389			default:
390				return super.onContextItemSelected(item);
391		}
392	}
393
394	private void shareImage(Message message) {
395		Intent shareIntent = new Intent();
396		shareIntent.setAction(Intent.ACTION_SEND);
397		shareIntent.putExtra(Intent.EXTRA_STREAM,
398				activity.xmppConnectionService.getFileBackend()
399						.getJingleFileUri(message));
400		shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
401		shareIntent.setType("image/webp");
402		activity.startActivity(Intent.createChooser(shareIntent,
403				getText(R.string.share_with)));
404	}
405
406	private void copyText(Message message) {
407		if (activity.copyTextToClipboard(message.getMergedBody(),
408				R.string.message_text)) {
409			Toast.makeText(activity, R.string.message_copied_to_clipboard,
410					Toast.LENGTH_SHORT).show();
411		}
412	}
413
414	private void resendMessage(Message message) {
415		activity.xmppConnectionService.resendFailedMessages(message);
416	}
417
418	private void copyUrl(Message message) {
419		if (activity.copyTextToClipboard(
420				message.getImageParams().url.toString(), R.string.image_url)) {
421			Toast.makeText(activity, R.string.url_copied_to_clipboard,
422					Toast.LENGTH_SHORT).show();
423		}
424	}
425
426	private void downloadImage(Message message) {
427		activity.xmppConnectionService.getHttpConnectionManager()
428				.createNewConnection(message);
429	}
430
431	protected void privateMessageWith(final Jid counterpart) {
432		this.mEditMessage.setText("");
433		this.conversation.setNextCounterpart(counterpart);
434		updateChatMsgHint();
435	}
436
437	protected void highlightInConference(String nick) {
438		String oldString = mEditMessage.getText().toString().trim();
439		if (oldString.isEmpty() || mEditMessage.getSelectionStart() == 0) {
440			mEditMessage.getText().insert(0, nick + ": ");
441		} else {
442			if (mEditMessage.getText().charAt(
443					mEditMessage.getSelectionStart() - 1) != ' ') {
444				nick = " " + nick;
445			}
446			mEditMessage.getText().insert(mEditMessage.getSelectionStart(),
447					nick + " ");
448		}
449	}
450
451	@Override
452	public void onStop() {
453		mDecryptJobRunning = false;
454		super.onStop();
455		if (this.conversation != null) {
456			this.conversation.setNextMessage(mEditMessage.getText().toString());
457		}
458	}
459
460	public void reInit(Conversation conversation) {
461		if (this.conversation != null) {
462			this.conversation.setNextMessage(mEditMessage.getText().toString());
463		}
464		this.activity = (ConversationActivity) getActivity();
465		this.conversation = conversation;
466		if (this.conversation.getMode() == Conversation.MODE_MULTI) {
467			this.conversation.setNextCounterpart(null);
468		}
469		this.mEditMessage.setText("");
470		this.mEditMessage.append(this.conversation.getNextMessage());
471		this.messagesView.invalidate();
472		updateMessages();
473	}
474
475	public void updateMessages() {
476		if (getView() == null) {
477			return;
478		}
479		hideSnackbar();
480		final ConversationActivity activity = (ConversationActivity) getActivity();
481		if (this.conversation != null) {
482			final Contact contact = this.conversation.getContact();
483			if (this.conversation.isMuted()) {
484				showSnackbar(R.string.notifications_disabled, R.string.enable,
485						new OnClickListener() {
486
487							@Override
488							public void onClick(View v) {
489								conversation.setMutedTill(0);
490								activity.xmppConnectionService.databaseBackend
491										.updateConversation(conversation);
492								updateMessages();
493							}
494						});
495			} else if (!contact.showInRoster()
496					&& contact
497					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
498				showSnackbar(R.string.contact_added_you, R.string.add_back,
499						new OnClickListener() {
500
501							@Override
502							public void onClick(View v) {
503								activity.xmppConnectionService
504										.createContact(contact);
505								activity.switchToContactDetails(contact);
506							}
507						});
508			}
509			for (Message message : this.conversation.getMessages()) {
510				if (message.getEncryption() == Message.ENCRYPTION_PGP
511						&& (message.getStatus() == Message.STATUS_RECEIVED || message
512						.getStatus() >= Message.STATUS_SEND)
513						&& message.getDownloadable() == null) {
514					if (!mEncryptedMessages.contains(message)) {
515						mEncryptedMessages.add(message);
516					}
517				}
518			}
519			decryptNext();
520			this.messageList.clear();
521			if (this.conversation.getMessages().size() == 0) {
522				messagesLoaded = false;
523			} else {
524				this.messageList.addAll(this.conversation.getMessages());
525				messagesLoaded = true;
526				updateStatusMessages();
527			}
528			this.messageListAdapter.notifyDataSetChanged();
529			if (conversation.getMode() == Conversation.MODE_SINGLE) {
530				if (messageList.size() >= 1) {
531					makeFingerprintWarning();
532				}
533			} else {
534				if (!conversation.getMucOptions().online()
535						&& conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
536					int error = conversation.getMucOptions().getError();
537					switch (error) {
538						case MucOptions.ERROR_NICK_IN_USE:
539							showSnackbar(R.string.nick_in_use, R.string.edit,
540									clickToMuc);
541							break;
542						case MucOptions.ERROR_ROOM_NOT_FOUND:
543							showSnackbar(R.string.conference_not_found,
544									R.string.leave, leaveMuc);
545							break;
546						case MucOptions.ERROR_PASSWORD_REQUIRED:
547							showSnackbar(R.string.conference_requires_password,
548									R.string.enter_password, enterPassword);
549							break;
550						case MucOptions.ERROR_BANNED:
551							showSnackbar(R.string.conference_banned,
552									R.string.leave, leaveMuc);
553							break;
554						case MucOptions.ERROR_MEMBERS_ONLY:
555							showSnackbar(R.string.conference_members_only,
556									R.string.leave, leaveMuc);
557							break;
558						case MucOptions.KICKED_FROM_ROOM:
559							showSnackbar(R.string.conference_kicked, R.string.join,
560									joinMuc);
561							break;
562						default:
563							break;
564					}
565				}
566			}
567			updateChatMsgHint();
568			if (!activity.isConversationsOverviewVisable() || !activity.isConversationsOverviewHideable()) {
569				activity.xmppConnectionService.markRead(conversation, true);
570				activity.updateConversationList();
571			}
572			this.updateSendButton();
573		}
574	}
575
576	private void decryptNext() {
577		Message next = this.mEncryptedMessages.peek();
578		PgpEngine engine = activity.xmppConnectionService.getPgpEngine();
579
580		if (next != null && engine != null && !mDecryptJobRunning) {
581			mDecryptJobRunning = true;
582			engine.decrypt(next, new UiCallback<Message>() {
583
584				@Override
585				public void userInputRequried(PendingIntent pi, Message message) {
586					mDecryptJobRunning = false;
587					askForPassphraseIntent = pi.getIntentSender();
588					showSnackbar(R.string.openpgp_messages_found,
589							R.string.decrypt, clickToDecryptListener);
590				}
591
592				@Override
593				public void success(Message message) {
594					mDecryptJobRunning = false;
595					mEncryptedMessages.remove();
596					activity.xmppConnectionService.updateMessage(message);
597				}
598
599				@Override
600				public void error(int error, Message message) {
601					message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
602					mDecryptJobRunning = false;
603					mEncryptedMessages.remove();
604					activity.xmppConnectionService.updateConversationUi();
605				}
606			});
607		}
608	}
609
610	private void messageSent() {
611		int size = this.messageList.size();
612		messagesView.setSelection(size - 1);
613		mEditMessage.setText("");
614		updateChatMsgHint();
615	}
616
617	public void updateSendButton() {
618		Conversation c = this.conversation;
619		if (activity.useSendButtonToIndicateStatus() && c != null
620				&& c.getAccount().getStatus() == Account.STATUS_ONLINE) {
621			if (c.getMode() == Conversation.MODE_SINGLE) {
622				switch (c.getContact().getMostAvailableStatus()) {
623					case Presences.CHAT:
624						this.mSendButton
625								.setImageResource(R.drawable.ic_action_send_now_online);
626						break;
627					case Presences.ONLINE:
628						this.mSendButton
629								.setImageResource(R.drawable.ic_action_send_now_online);
630						break;
631					case Presences.AWAY:
632						this.mSendButton
633								.setImageResource(R.drawable.ic_action_send_now_away);
634						break;
635					case Presences.XA:
636						this.mSendButton
637								.setImageResource(R.drawable.ic_action_send_now_away);
638						break;
639					case Presences.DND:
640						this.mSendButton
641								.setImageResource(R.drawable.ic_action_send_now_dnd);
642						break;
643					default:
644						this.mSendButton
645								.setImageResource(R.drawable.ic_action_send_now_offline);
646						break;
647				}
648			} else if (c.getMode() == Conversation.MODE_MULTI) {
649				if (c.getMucOptions().online()) {
650					this.mSendButton
651							.setImageResource(R.drawable.ic_action_send_now_online);
652				} else {
653					this.mSendButton
654							.setImageResource(R.drawable.ic_action_send_now_offline);
655				}
656			} else {
657				this.mSendButton
658						.setImageResource(R.drawable.ic_action_send_now_offline);
659			}
660		} else {
661			this.mSendButton
662					.setImageResource(R.drawable.ic_action_send_now_offline);
663		}
664	}
665
666	protected void updateStatusMessages() {
667		if (conversation.getMode() == Conversation.MODE_SINGLE) {
668			for (int i = this.messageList.size() - 1; i >= 0; --i) {
669				if (this.messageList.get(i).getStatus() == Message.STATUS_RECEIVED) {
670					return;
671				} else {
672					if (this.messageList.get(i).getStatus() == Message.STATUS_SEND_DISPLAYED) {
673						this.messageList.add(i + 1,
674								Message.createStatusMessage(conversation));
675						return;
676					}
677				}
678			}
679		}
680	}
681
682	protected void makeFingerprintWarning() {
683		Set<String> knownFingerprints = conversation.getContact()
684				.getOtrFingerprints();
685		if (conversation.hasValidOtrSession()
686				&& (!conversation.isMuted())
687				&& (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) && (!knownFingerprints
688				.contains(conversation.getOtrFingerprint()))) {
689			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify,
690					new OnClickListener() {
691
692						@Override
693						public void onClick(View v) {
694							if (conversation.getOtrFingerprint() != null) {
695								AlertDialog dialog = UIHelper
696										.getVerifyFingerprintDialog(
697												(ConversationActivity) getActivity(),
698												conversation, snackbar);
699								dialog.show();
700							}
701						}
702					});
703		}
704	}
705
706	protected void showSnackbar(int message, int action,
707								OnClickListener clickListener) {
708		snackbar.setVisibility(View.VISIBLE);
709		snackbar.setOnClickListener(null);
710		snackbarMessage.setText(message);
711		snackbarMessage.setOnClickListener(null);
712		snackbarAction.setText(action);
713		snackbarAction.setOnClickListener(clickListener);
714	}
715
716	protected void hideSnackbar() {
717		snackbar.setVisibility(View.GONE);
718	}
719
720	protected void sendPlainTextMessage(Message message) {
721		ConversationActivity activity = (ConversationActivity) getActivity();
722		activity.xmppConnectionService.sendMessage(message);
723		messageSent();
724	}
725
726	protected void sendPgpMessage(final Message message) {
727		final ConversationActivity activity = (ConversationActivity) getActivity();
728		final XmppConnectionService xmppService = activity.xmppConnectionService;
729		final Contact contact = message.getConversation().getContact();
730		if (activity.hasPgp()) {
731			if (conversation.getMode() == Conversation.MODE_SINGLE) {
732				if (contact.getPgpKeyId() != 0) {
733					xmppService.getPgpEngine().hasKey(contact,
734							new UiCallback<Contact>() {
735
736								@Override
737								public void userInputRequried(PendingIntent pi,
738															  Contact contact) {
739									activity.runIntent(
740											pi,
741											ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
742								}
743
744								@Override
745								public void success(Contact contact) {
746									messageSent();
747									activity.encryptTextMessage(message);
748								}
749
750								@Override
751								public void error(int error, Contact contact) {
752
753								}
754							});
755
756				} else {
757					showNoPGPKeyDialog(false,
758							new DialogInterface.OnClickListener() {
759
760								@Override
761								public void onClick(DialogInterface dialog,
762													int which) {
763									conversation
764											.setNextEncryption(Message.ENCRYPTION_NONE);
765									xmppService.databaseBackend
766											.updateConversation(conversation);
767									message.setEncryption(Message.ENCRYPTION_NONE);
768									xmppService.sendMessage(message);
769									messageSent();
770								}
771							});
772				}
773			} else {
774				if (conversation.getMucOptions().pgpKeysInUse()) {
775					if (!conversation.getMucOptions().everybodyHasKeys()) {
776						Toast warning = Toast
777								.makeText(getActivity(),
778										R.string.missing_public_keys,
779										Toast.LENGTH_LONG);
780						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
781						warning.show();
782					}
783					activity.encryptTextMessage(message);
784					messageSent();
785				} else {
786					showNoPGPKeyDialog(true,
787							new DialogInterface.OnClickListener() {
788
789								@Override
790								public void onClick(DialogInterface dialog,
791													int which) {
792									conversation
793											.setNextEncryption(Message.ENCRYPTION_NONE);
794									message.setEncryption(Message.ENCRYPTION_NONE);
795									xmppService.databaseBackend
796											.updateConversation(conversation);
797									xmppService.sendMessage(message);
798									messageSent();
799								}
800							});
801				}
802			}
803		} else {
804			activity.showInstallPgpDialog();
805		}
806	}
807
808	public void showNoPGPKeyDialog(boolean plural,
809								   DialogInterface.OnClickListener listener) {
810		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
811		builder.setIconAttribute(android.R.attr.alertDialogIcon);
812		if (plural) {
813			builder.setTitle(getString(R.string.no_pgp_keys));
814			builder.setMessage(getText(R.string.contacts_have_no_pgp_keys));
815		} else {
816			builder.setTitle(getString(R.string.no_pgp_key));
817			builder.setMessage(getText(R.string.contact_has_no_pgp_key));
818		}
819		builder.setNegativeButton(getString(R.string.cancel), null);
820		builder.setPositiveButton(getString(R.string.send_unencrypted),
821				listener);
822		builder.create().show();
823	}
824
825	protected void sendOtrMessage(final Message message) {
826		final ConversationActivity activity = (ConversationActivity) getActivity();
827		final XmppConnectionService xmppService = activity.xmppConnectionService;
828		activity.selectPresence(message.getConversation(),
829			new OnPresenceSelected() {
830
831				@Override
832				public void onPresenceSelected() {
833					message.setCounterpart(conversation.getNextCounterpart());
834					xmppService.sendMessage(message);
835					messageSent();
836				}
837			});
838	}
839
840	public void appendText(String text) {
841		String previous = this.mEditMessage.getText().toString();
842		if (previous.length() != 0 && !previous.endsWith(" ")) {
843			text = " " + text;
844		}
845		this.mEditMessage.append(text);
846	}
847
848	public void clearInputField() {
849		this.mEditMessage.setText("");
850	}
851}