conversations-classic/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java

package eu.siacs.conversations.ui;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.databinding.DataBindingUtil;
import android.net.Uri;
import android.os.Build;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.support.v7.app.AlertDialog;
import android.app.Fragment;
import android.app.PendingIntent;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentSender.SendIntentException;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.support.v13.view.inputmethod.InputConnectionCompat;
import android.support.v13.view.inputmethod.InputContentInfoCompat;
import android.text.Editable;
import android.util.Log;
import android.util.Pair;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.PopupMenu;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;

import org.openintents.openpgp.util.OpenPgpApi;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.atomic.AtomicBoolean;

import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
import eu.siacs.conversations.databinding.FragmentConversationBinding;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Blockable;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.DownloadableFile;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.entities.MucOptions;
import eu.siacs.conversations.entities.Presence;
import eu.siacs.conversations.entities.ReadByMarker;
import eu.siacs.conversations.entities.Transferable;
import eu.siacs.conversations.entities.TransferablePlaceholder;
import eu.siacs.conversations.http.HttpDownloadConnection;
import eu.siacs.conversations.persistance.FileBackend;
import eu.siacs.conversations.services.MessageArchiveService;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.ui.adapter.MessageAdapter;
import eu.siacs.conversations.ui.util.ActivityResult;
import eu.siacs.conversations.ui.util.AttachmentTool;
import eu.siacs.conversations.ui.util.ConversationMenuConfigurator;
import eu.siacs.conversations.ui.util.PendingItem;
import eu.siacs.conversations.ui.util.PresenceSelector;
import eu.siacs.conversations.ui.util.SendButtonAction;
import eu.siacs.conversations.ui.util.SendButtonTool;
import eu.siacs.conversations.ui.widget.EditMessage;
import eu.siacs.conversations.utils.MessageUtils;
import eu.siacs.conversations.utils.NickValidityChecker;
import eu.siacs.conversations.utils.StylingHelper;
import eu.siacs.conversations.utils.UIHelper;
import eu.siacs.conversations.xmpp.XmppConnection;
import eu.siacs.conversations.xmpp.chatstate.ChatState;
import eu.siacs.conversations.xmpp.jid.Jid;

import static eu.siacs.conversations.ui.XmppActivity.EXTRA_ACCOUNT;
import static eu.siacs.conversations.ui.XmppActivity.REQUEST_ANNOUNCE_PGP;
import static eu.siacs.conversations.ui.XmppActivity.REQUEST_CHOOSE_PGP_ID;


public class ConversationFragment extends XmppFragment implements EditMessage.KeyboardListener {


	public static final int REQUEST_SEND_MESSAGE = 0x0201;
	public static final int REQUEST_DECRYPT_PGP = 0x0202;
	public static final int REQUEST_ENCRYPT_MESSAGE = 0x0207;
	public static final int REQUEST_TRUST_KEYS_TEXT = 0x0208;
	public static final int REQUEST_TRUST_KEYS_MENU = 0x0209;
	public static final int REQUEST_START_DOWNLOAD = 0x0210;
	public static final int REQUEST_ADD_EDITOR_CONTENT = 0x0211;
	public static final int ATTACHMENT_CHOICE_CHOOSE_IMAGE = 0x0301;
	public static final int ATTACHMENT_CHOICE_TAKE_PHOTO = 0x0302;
	public static final int ATTACHMENT_CHOICE_CHOOSE_FILE = 0x0303;
	public static final int ATTACHMENT_CHOICE_RECORD_VOICE = 0x0304;
	public static final int ATTACHMENT_CHOICE_LOCATION = 0x0305;
	public static final int ATTACHMENT_CHOICE_INVALID = 0x0306;
	public static final int ATTACHMENT_CHOICE_RECORD_VIDEO = 0x0307;

	public static final String RECENTLY_USED_QUICK_ACTION = "recently_used_quick_action";
	public static final String STATE_CONVERSATION_UUID = ConversationFragment.class.getName() + ".uuid";
	public static final String STATE_SCROLL_POSITION = ConversationFragment.class.getName() + ".scroll_position";


	final protected List<Message> messageList = new ArrayList<>();
	private final PendingItem<ActivityResult> postponedActivityResult = new PendingItem<>();
	private final PendingItem<String> pendingConversationsUuid = new PendingItem<>();
	public Uri mPendingEditorContent = null;
	protected MessageAdapter messageListAdapter;
	private Conversation conversation;
	private FragmentConversationBinding binding;
	private Toast messageLoaderToast;
	private ConversationActivity activity;

	private OnClickListener clickToMuc = new OnClickListener() {

		@Override
		public void onClick(View v) {
			Intent intent = new Intent(getActivity(), ConferenceDetailsActivity.class);
			intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
			intent.putExtra("uuid", conversation.getUuid());
			startActivity(intent);
		}
	};
	private OnClickListener leaveMuc = new OnClickListener() {

		@Override
		public void onClick(View v) {
			activity.onConversationArchived(conversation);
		}
	};
	private OnClickListener joinMuc = new OnClickListener() {

		@Override
		public void onClick(View v) {
			activity.xmppConnectionService.joinMuc(conversation);
		}
	};
	private OnClickListener enterPassword = new OnClickListener() {

		@Override
		public void onClick(View v) {
			MucOptions muc = conversation.getMucOptions();
			String password = muc.getPassword();
			if (password == null) {
				password = "";
			}
			activity.quickPasswordEdit(password, value -> {
				activity.xmppConnectionService.providePasswordForMuc(conversation, value);
				return null;
			});
		}
	};
	private OnScrollListener mOnScrollListener = new OnScrollListener() {

		@Override
		public void onScrollStateChanged(AbsListView view, int scrollState) {
			// TODO Auto-generated method stub

		}

		@Override
		public void onScroll(final AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
			synchronized (ConversationFragment.this.messageList) {
				if (firstVisibleItem < 5 && conversation != null && conversation.messagesLoaded.compareAndSet(true, false) && messageList.size() > 0) {
					long timestamp;
					if (messageList.get(0).getType() == Message.TYPE_STATUS && messageList.size() >= 2) {
						timestamp = messageList.get(1).getTimeSent();
					} else {
						timestamp = messageList.get(0).getTimeSent();
					}
					activity.xmppConnectionService.loadMoreMessages(conversation, timestamp, new XmppConnectionService.OnMoreMessagesLoaded() {
						@Override
						public void onMoreMessagesLoaded(final int c, final Conversation conversation) {
							if (ConversationFragment.this.conversation != conversation) {
								conversation.messagesLoaded.set(true);
								return;
							}
							getActivity().runOnUiThread(() -> {
								final int oldPosition = binding.messagesView.getFirstVisiblePosition();
								Message message = null;
								int childPos;
								for (childPos = 0; childPos + oldPosition < messageList.size(); ++childPos) {
									message = messageList.get(oldPosition + childPos);
									if (message.getType() != Message.TYPE_STATUS) {
										break;
									}
								}
								final String uuid = message != null ? message.getUuid() : null;
								View v = binding.messagesView.getChildAt(childPos);
								final int pxOffset = (v == null) ? 0 : v.getTop();
								ConversationFragment.this.conversation.populateWithMessages(ConversationFragment.this.messageList);
								try {
									updateStatusMessages();
								} catch (IllegalStateException e) {
									Log.d(Config.LOGTAG, "caught illegal state exception while updating status messages");
								}
								messageListAdapter.notifyDataSetChanged();
								int pos = Math.max(getIndexOf(uuid, messageList), 0);
								binding.messagesView.setSelectionFromTop(pos, pxOffset);
								if (messageLoaderToast != null) {
									messageLoaderToast.cancel();
								}
								conversation.messagesLoaded.set(true);
							});
						}

						@Override
						public void informUser(final int resId) {

							getActivity().runOnUiThread(() -> {
								if (messageLoaderToast != null) {
									messageLoaderToast.cancel();
								}
								if (ConversationFragment.this.conversation != conversation) {
									return;
								}
								messageLoaderToast = Toast.makeText(view.getContext(), resId, Toast.LENGTH_LONG);
								messageLoaderToast.show();
							});

						}
					});

				}
			}
		}
	};

	private EditMessage.OnCommitContentListener mEditorContentListener = new EditMessage.OnCommitContentListener() {
		@Override
		public boolean onCommitContent(InputContentInfoCompat inputContentInfo, int flags, Bundle opts, String[] contentMimeTypes) {
			// try to get permission to read the image, if applicable
			if ((flags & InputConnectionCompat.INPUT_CONTENT_GRANT_READ_URI_PERMISSION) != 0) {
				try {
					inputContentInfo.requestPermission();
				} catch (Exception e) {
					Log.e(Config.LOGTAG, "InputContentInfoCompat#requestPermission() failed.", e);
					Toast.makeText(getActivity(), activity.getString(R.string.no_permission_to_access_x, inputContentInfo.getDescription()), Toast.LENGTH_LONG
					).show();
					return false;
				}
			}
			if (activity.hasStoragePermission(REQUEST_ADD_EDITOR_CONTENT)) {
				attachImageToConversation(inputContentInfo.getContentUri());
			} else {
				mPendingEditorContent = inputContentInfo.getContentUri();
			}
			return true;
		}
	};
	private Message selectedMessage;
	private OnClickListener mEnableAccountListener = new OnClickListener() {
		@Override
		public void onClick(View v) {
			final Account account = conversation == null ? null : conversation.getAccount();
			if (account != null) {
				account.setOption(Account.OPTION_DISABLED, false);
				activity.xmppConnectionService.updateAccount(account);
			}
		}
	};
	private OnClickListener mUnblockClickListener = new OnClickListener() {
		@Override
		public void onClick(final View v) {
			v.post(() -> v.setVisibility(View.INVISIBLE));
			if (conversation.isDomainBlocked()) {
				BlockContactDialog.show(activity, conversation);
			} else {
				unblockConversation(conversation);
			}
		}
	};
	private OnClickListener mBlockClickListener = this::showBlockSubmenu;
	private OnClickListener mAddBackClickListener = new OnClickListener() {

		@Override
		public void onClick(View v) {
			final Contact contact = conversation == null ? null : conversation.getContact();
			if (contact != null) {
				activity.xmppConnectionService.createContact(contact);
				activity.switchToContactDetails(contact);
			}
		}
	};
	private View.OnLongClickListener mLongPressBlockListener = this::showBlockSubmenu;
	private OnClickListener mAllowPresenceSubscription = new OnClickListener() {
		@Override
		public void onClick(View v) {
			final Contact contact = conversation == null ? null : conversation.getContact();
			if (contact != null) {
				activity.xmppConnectionService.sendPresencePacket(contact.getAccount(),
						activity.xmppConnectionService.getPresenceGenerator()
								.sendPresenceUpdatesTo(contact));
				hideSnackbar();
			}
		}
	};

	protected OnClickListener clickToDecryptListener = new OnClickListener() {

		@Override
		public void onClick(View v) {
			PendingIntent pendingIntent = conversation.getAccount().getPgpDecryptionService().getPendingIntent();
			if (pendingIntent != null) {
				try {
					getActivity().startIntentSenderForResult(pendingIntent.getIntentSender(),
							REQUEST_DECRYPT_PGP,
							null,
							0,
							0,
							0);
				} catch (SendIntentException e) {
					Toast.makeText(getActivity(), R.string.unable_to_connect_to_keychain, Toast.LENGTH_SHORT).show();
					conversation.getAccount().getPgpDecryptionService().continueDecryption(true);
				}
			}
			updateSnackBar(conversation);
		}
	};
	private AtomicBoolean mSendingPgpMessage = new AtomicBoolean(false);
	private OnEditorActionListener mEditorActionListener = (v, actionId, event) -> {
		if (actionId == EditorInfo.IME_ACTION_SEND) {
			InputMethodManager imm = (InputMethodManager) v.getContext()
					.getSystemService(Context.INPUT_METHOD_SERVICE);
			if (imm.isFullscreenMode()) {
				imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
			}
			sendMessage();
			return true;
		} else {
			return false;
		}
	};
	private OnClickListener mSendButtonListener = new OnClickListener() {

		@Override
		public void onClick(View v) {
			Object tag = v.getTag();
			if (tag instanceof SendButtonAction) {
				SendButtonAction action = (SendButtonAction) tag;
				switch (action) {
					case TAKE_PHOTO:
					case RECORD_VIDEO:
					case SEND_LOCATION:
					case RECORD_VOICE:
					case CHOOSE_PICTURE:
						attachFile(action.toChoice());
						break;
					case CANCEL:
						if (conversation != null) {
							if (conversation.setCorrectingMessage(null)) {
								binding.textinput.setText("");
								binding.textinput.append(conversation.getDraftMessage());
								conversation.setDraftMessage(null);
							} else if (conversation.getMode() == Conversation.MODE_MULTI) {
								conversation.setNextCounterpart(null);
							}
							updateChatMsgHint();
							updateSendButton();
							updateEditablity();
						}
						break;
					default:
						sendMessage();
				}
			} else {
				sendMessage();
			}
		}
	};
	private int completionIndex = 0;
	private int lastCompletionLength = 0;
	private String incomplete;
	private int lastCompletionCursor;
	private boolean firstWord = false;
	private Message mPendingDownloadableMessage;

	private int getIndexOf(String uuid, List<Message> messages) {
		if (uuid == null) {
			return messages.size() - 1;
		}
		for (int i = 0; i < messages.size(); ++i) {
			if (uuid.equals(messages.get(i).getUuid())) {
				return i;
			} else {
				Message next = messages.get(i);
				while (next != null && next.wasMergedIntoPrevious()) {
					if (uuid.equals(next.getUuid())) {
						return i;
					}
					next = next.next();
				}

			}
		}
		return -1;
	}

	public Pair<Integer, Integer> getScrollPosition() {
		if (this.binding.messagesView.getCount() == 0 ||
				this.binding.messagesView.getLastVisiblePosition() == this.binding.messagesView.getCount() - 1) {
			return null;
		} else {
			final int pos = this.binding.messagesView.getFirstVisiblePosition();
			final View view = this.binding.messagesView.getChildAt(0);
			if (view == null) {
				return null;
			} else {
				return new Pair<>(pos, view.getTop());
			}
		}
	}

	public void setScrollPosition(Pair<Integer, Integer> scrollPosition) {
		if (scrollPosition != null) {
			this.binding.messagesView.setSelectionFromTop(scrollPosition.first, scrollPosition.second);
		}
	}


	private void attachLocationToConversation(Conversation conversation, Uri uri) {
		if (conversation == null) {
			return;
		}
		activity.xmppConnectionService.attachLocationToConversation(conversation, uri, new UiCallback<Message>() {

			@Override
			public void success(Message message) {
				activity.xmppConnectionService.sendMessage(message);
			}

			@Override
			public void error(int errorCode, Message object) {

			}

			@Override
			public void userInputRequried(PendingIntent pi, Message object) {

			}
		});
	}

	private void attachFileToConversation(Conversation conversation, Uri uri) {
		if (conversation == null) {
			return;
		}
		final Toast prepareFileToast = Toast.makeText(getActivity(), getText(R.string.preparing_file), Toast.LENGTH_LONG);
		prepareFileToast.show();
		activity.delegateUriPermissionsToService(uri);
		activity.xmppConnectionService.attachFileToConversation(conversation, uri, new UiInformableCallback<Message>() {
			@Override
			public void inform(final String text) {
				hidePrepareFileToast(prepareFileToast);
				getActivity().runOnUiThread(() -> activity.replaceToast(text));
			}

			@Override
			public void success(Message message) {
				getActivity().runOnUiThread(() -> activity.hideToast());
				hidePrepareFileToast(prepareFileToast);
				activity.xmppConnectionService.sendMessage(message);
			}

			@Override
			public void error(final int errorCode, Message message) {
				hidePrepareFileToast(prepareFileToast);
				getActivity().runOnUiThread(() -> activity.replaceToast(getString(errorCode)));

			}

			@Override
			public void userInputRequried(PendingIntent pi, Message message) {
				hidePrepareFileToast(prepareFileToast);
			}
		});
	}

	public void attachImageToConversation(Uri uri) {
		this.attachImageToConversation(conversation, uri);
	}

	private void attachImageToConversation(Conversation conversation, Uri uri) {
		if (conversation == null) {
			return;
		}
		final Toast prepareFileToast = Toast.makeText(getActivity(), getText(R.string.preparing_image), Toast.LENGTH_LONG);
		prepareFileToast.show();
		activity.delegateUriPermissionsToService(uri);
		activity.xmppConnectionService.attachImageToConversation(conversation, uri,
				new UiCallback<Message>() {

					@Override
					public void userInputRequried(PendingIntent pi, Message object) {
						hidePrepareFileToast(prepareFileToast);
					}

					@Override
					public void success(Message message) {
						hidePrepareFileToast(prepareFileToast);
						activity.xmppConnectionService.sendMessage(message);
					}

					@Override
					public void error(final int error, Message message) {
						hidePrepareFileToast(prepareFileToast);
						activity.runOnUiThread(() -> activity.replaceToast(getString(error)));
					}
				});
	}

	private void hidePrepareFileToast(final Toast prepareFileToast) {
		if (prepareFileToast != null) {
			activity.runOnUiThread(prepareFileToast::cancel);
		}
	}

	private void sendMessage() {
		final String body = this.binding.textinput.getText().toString();
		final Conversation conversation = this.conversation;
		if (body.length() == 0 || conversation == null) {
			return;
		}
		final Message message;
		if (conversation.getCorrectingMessage() == null) {
			message = new Message(conversation, body, conversation.getNextEncryption());
			if (conversation.getMode() == Conversation.MODE_MULTI) {
				final Jid nextCounterpart = conversation.getNextCounterpart();
				if (nextCounterpart != null) {
					message.setCounterpart(nextCounterpart);
					message.setTrueCounterpart(conversation.getMucOptions().getTrueCounterpart(nextCounterpart));
					message.setType(Message.TYPE_PRIVATE);
				}
			}
		} else {
			message = conversation.getCorrectingMessage();
			message.setBody(body);
			message.setEdited(message.getUuid());
			message.setUuid(UUID.randomUUID().toString());
		}
		switch (message.getConversation().getNextEncryption()) {
			case Message.ENCRYPTION_PGP:
				sendPgpMessage(message);
				break;
			case Message.ENCRYPTION_AXOLOTL:
				if (!trustKeysIfNeeded(REQUEST_TRUST_KEYS_TEXT)) {
					sendAxolotlMessage(message);
				}
				break;
			default:
				sendPlainTextMessage(message);
		}
	}

	protected boolean trustKeysIfNeeded(int requestCode) {
		return trustKeysIfNeeded(requestCode, ATTACHMENT_CHOICE_INVALID);
	}

	protected boolean trustKeysIfNeeded(int requestCode, int attachmentChoice) {
		AxolotlService axolotlService = conversation.getAccount().getAxolotlService();
		final List<Jid> targets = axolotlService.getCryptoTargets(conversation);
		boolean hasUnaccepted = !conversation.getAcceptedCryptoTargets().containsAll(targets);
		boolean hasUndecidedOwn = !axolotlService.getKeysWithTrust(FingerprintStatus.createActiveUndecided()).isEmpty();
		boolean hasUndecidedContacts = !axolotlService.getKeysWithTrust(FingerprintStatus.createActiveUndecided(), targets).isEmpty();
		boolean hasPendingKeys = !axolotlService.findDevicesWithoutSession(conversation).isEmpty();
		boolean hasNoTrustedKeys = axolotlService.anyTargetHasNoTrustedKeys(targets);
		if (hasUndecidedOwn || hasUndecidedContacts || hasPendingKeys || hasNoTrustedKeys || hasUnaccepted) {
			axolotlService.createSessionsIfNeeded(conversation);
			Intent intent = new Intent(getActivity(), TrustKeysActivity.class);
			String[] contacts = new String[targets.size()];
			for (int i = 0; i < contacts.length; ++i) {
				contacts[i] = targets.get(i).toString();
			}
			intent.putExtra("contacts", contacts);
			intent.putExtra(EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
			intent.putExtra("choice", attachmentChoice);
			intent.putExtra("conversation", conversation.getUuid());
			startActivityForResult(intent, requestCode);
			return true;
		} else {
			return false;
		}
	}

	public void updateChatMsgHint() {
		final boolean multi = conversation.getMode() == Conversation.MODE_MULTI;
		if (conversation.getCorrectingMessage() != null) {
			this.binding.textinput.setHint(R.string.send_corrected_message);
		} else if (multi && conversation.getNextCounterpart() != null) {
			this.binding.textinput.setHint(getString(
					R.string.send_private_message_to,
					conversation.getNextCounterpart().getResourcepart()));
		} else if (multi && !conversation.getMucOptions().participating()) {
			this.binding.textinput.setHint(R.string.you_are_not_participating);
		} else {
			this.binding.textinput.setHint(UIHelper.getMessageHint(getActivity(), conversation));
			getActivity().invalidateOptionsMenu();
		}
	}

	public void setupIme() {
		this.binding.textinput.refreshIme();
	}

	private void handleActivityResult(ActivityResult activityResult) {
		if (activityResult.resultCode == Activity.RESULT_OK) {
			handlePositiveActivityResult(activityResult.requestCode, activityResult.data);
		} else {
			handleNegativeActivityResult(activityResult.requestCode);
		}
	}

	private void handlePositiveActivityResult(int requestCode, final Intent data) {
		switch (requestCode) {
			case REQUEST_DECRYPT_PGP:
				conversation.getAccount().getPgpDecryptionService().continueDecryption(data);
				break;
			case REQUEST_TRUST_KEYS_TEXT:
				final String body = this.binding.textinput.getText().toString();
				Message message = new Message(conversation, body, conversation.getNextEncryption());
				sendAxolotlMessage(message);
				break;
			case REQUEST_TRUST_KEYS_MENU:
				int choice = data.getIntExtra("choice", ATTACHMENT_CHOICE_INVALID);
				selectPresenceToAttachFile(choice);
				break;
			case REQUEST_CHOOSE_PGP_ID:
				long id = data.getLongExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, 0);
				if (id != 0) {
					conversation.getAccount().setPgpSignId(id);
					activity.announcePgp(conversation.getAccount(), null, null, activity.onOpenPGPKeyPublished);
				} else {
					activity.choosePgpSignId(conversation.getAccount());
				}
				break;
			case REQUEST_ANNOUNCE_PGP:
				activity.announcePgp(conversation.getAccount(), conversation, data, activity.onOpenPGPKeyPublished);
				break;
			case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
				List<Uri> imageUris = AttachmentTool.extractUriFromIntent(data);
				for (Iterator<Uri> i = imageUris.iterator(); i.hasNext(); i.remove()) {
					Log.d(Config.LOGTAG, "ConversationsActivity.onActivityResult() - attaching image to conversations. CHOOSE_IMAGE");
					attachImageToConversation(conversation, i.next());
				}
				break;
			case ATTACHMENT_CHOICE_CHOOSE_FILE:
			case ATTACHMENT_CHOICE_RECORD_VIDEO:
			case ATTACHMENT_CHOICE_RECORD_VOICE:
				final List<Uri> fileUris = AttachmentTool.extractUriFromIntent(data);
				final PresenceSelector.OnPresenceSelected callback = () -> {
					for (Iterator<Uri> i = fileUris.iterator(); i.hasNext(); i.remove()) {
						Log.d(Config.LOGTAG, "ConversationsActivity.onActivityResult() - attaching file to conversations. CHOOSE_FILE/RECORD_VOICE/RECORD_VIDEO");
						attachFileToConversation(conversation, i.next());
					}
				};
				if (conversation == null || conversation.getMode() == Conversation.MODE_MULTI || FileBackend.allFilesUnderSize(getActivity(), fileUris, getMaxHttpUploadSize(conversation))) {
					callback.onPresenceSelected();
				} else {
					activity.selectPresence(conversation, callback);
				}
				break;
			case ATTACHMENT_CHOICE_LOCATION:
				double latitude = data.getDoubleExtra("latitude", 0);
				double longitude = data.getDoubleExtra("longitude", 0);
				Uri geo = Uri.parse("geo:" + String.valueOf(latitude) + "," + String.valueOf(longitude));
				attachLocationToConversation(conversation, geo);
				break;
		}
	}

	private void handleNegativeActivityResult(int requestCode) {
		switch (requestCode) {
			case REQUEST_DECRYPT_PGP:
				// discard the message to prevent decryption being blocked
				conversation.getAccount().getPgpDecryptionService().giveUpCurrentDecryption();
				break;
		}
	}

	@Override
	public void onActivityResult(int requestCode, int resultCode, final Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		ActivityResult activityResult = ActivityResult.of(requestCode, resultCode, data);
		if (activity != null && activity.xmppConnectionService != null) {
			handleActivityResult(activityResult);
		} else {
			this.postponedActivityResult.push(activityResult);
		}
	}

	public void unblockConversation(final Blockable conversation) {
		activity.xmppConnectionService.sendUnblockRequest(conversation);
	}

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);
		Log.d(Config.LOGTAG, "ConversationFragment.onAttach()");
		if (activity instanceof ConversationActivity) {
			this.activity = (ConversationActivity) activity;
		} else {
			throw new IllegalStateException("Trying to attach fragment to activity that is not the ConversationActivity");
		}
	}

	@Override
	public void onDetach() {
		super.onDetach();
		this.activity = null;
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setHasOptionsMenu(true);
	}


	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater menuInflater) {
		menuInflater.inflate(R.menu.fragment_conversation, menu);
		final MenuItem menuMucDetails = menu.findItem(R.id.action_muc_details);
		final MenuItem menuContactDetails = menu.findItem(R.id.action_contact_details);
		final MenuItem menuInviteContact = menu.findItem(R.id.action_invite);
		final MenuItem menuMute = menu.findItem(R.id.action_mute);
		final MenuItem menuUnmute = menu.findItem(R.id.action_unmute);


		if (conversation != null) {
			if (conversation.getMode() == Conversation.MODE_MULTI) {
				menuContactDetails.setVisible(false);
				menuInviteContact.setVisible(conversation.getMucOptions().canInvite());
			} else {
				menuContactDetails.setVisible(!this.conversation.withSelf());
				menuMucDetails.setVisible(false);
				final XmppConnectionService service = activity.xmppConnectionService;
				menuInviteContact.setVisible(service != null && service.findConferenceServer(conversation.getAccount()) != null);
			}
			if (conversation.isMuted()) {
				menuMute.setVisible(false);
			} else {
				menuUnmute.setVisible(false);
			}
			ConversationMenuConfigurator.configureAttachmentMenu(conversation, menu);
			ConversationMenuConfigurator.configureEncryptionMenu(conversation, menu);
		}
		super.onCreateOptionsMenu(menu, menuInflater);
	}

	@Override
	public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		this.binding = DataBindingUtil.inflate(inflater, R.layout.fragment_conversation, container, false);
		binding.getRoot().setOnClickListener(null); //TODO why the fuck did we do this?

		binding.textinput.addTextChangedListener(new StylingHelper.MessageEditorStyler(binding.textinput));

		binding.textinput.setOnEditorActionListener(mEditorActionListener);
		binding.textinput.setRichContentListener(new String[]{"image/*"}, mEditorContentListener);

		binding.textSendButton.setOnClickListener(this.mSendButtonListener);

		binding.messagesView.setOnScrollListener(mOnScrollListener);
		binding.messagesView.setTranscriptMode(ListView.TRANSCRIPT_MODE_NORMAL);
		messageListAdapter = new MessageAdapter((XmppActivity) getActivity(), this.messageList);
		messageListAdapter.setOnContactPictureClicked(message -> {
			final boolean received = message.getStatus() <= Message.STATUS_RECEIVED;
			if (received) {
				if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
					Jid user = message.getCounterpart();
					if (user != null && !user.isBareJid()) {
						if (!message.getConversation().getMucOptions().isUserInRoom(user)) {
							Toast.makeText(getActivity(), activity.getString(R.string.user_has_left_conference, user.getResourcepart()), Toast.LENGTH_SHORT).show();
						}
						highlightInConference(user.getResourcepart());
					}
					return;
				} else {
					if (!message.getContact().isSelf()) {
						String fingerprint;
						if (message.getEncryption() == Message.ENCRYPTION_PGP
								|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
							fingerprint = "pgp";
						} else {
							fingerprint = message.getFingerprint();
						}
						activity.switchToContactDetails(message.getContact(), fingerprint);
						return;
					}
				}
			}
			Account account = message.getConversation().getAccount();
			Intent intent;
			if (activity.manuallyChangePresence() && !received) {
				intent = new Intent(activity, SetPresenceActivity.class);
				intent.putExtra(EXTRA_ACCOUNT, account.getJid().toBareJid().toString());
			} else {
				intent = new Intent(activity, EditAccountActivity.class);
				intent.putExtra("jid", account.getJid().toBareJid().toString());
				String fingerprint;
				if (message.getEncryption() == Message.ENCRYPTION_PGP
						|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
					fingerprint = "pgp";
				} else {
					fingerprint = message.getFingerprint();
				}
				intent.putExtra("fingerprint", fingerprint);
			}
			startActivity(intent);
		});
		messageListAdapter.setOnContactPictureLongClicked(message -> {
			if (message.getStatus() <= Message.STATUS_RECEIVED) {
				if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
					final MucOptions mucOptions = conversation.getMucOptions();
					if (!mucOptions.allowPm()) {
						Toast.makeText(getActivity(), R.string.private_messages_are_disabled, Toast.LENGTH_SHORT).show();
						return;
					}
					Jid user = message.getCounterpart();
					if (user != null && !user.isBareJid()) {
						if (mucOptions.isUserInRoom(user)) {
							privateMessageWith(user);
						} else {
							Toast.makeText(getActivity(), activity.getString(R.string.user_has_left_conference, user.getResourcepart()), Toast.LENGTH_SHORT).show();
						}
					}
				}
			} else {
				activity.showQrCode();
			}
		});
		messageListAdapter.setOnQuoteListener(this::quoteText);
		binding.messagesView.setAdapter(messageListAdapter);

		registerForContextMenu(binding.messagesView);

		return binding.getRoot();
	}

	private void quoteText(String text) {
		if (binding.textinput.isEnabled()) {
			text = text.replaceAll("(\n *){2,}", "\n").replaceAll("(^|\n)", "$1> ").replaceAll("\n$", "");
			Editable editable = binding.textinput.getEditableText();
			int position = binding.textinput.getSelectionEnd();
			if (position == -1) position = editable.length();
			if (position > 0 && editable.charAt(position - 1) != '\n') {
				editable.insert(position++, "\n");
			}
			editable.insert(position, text);
			position += text.length();
			editable.insert(position++, "\n");
			if (position < editable.length() && editable.charAt(position) != '\n') {
				editable.insert(position, "\n");
			}
			binding.textinput.setSelection(position);
			binding.textinput.requestFocus();
			InputMethodManager inputMethodManager = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
			if (inputMethodManager != null) {
				inputMethodManager.showSoftInput(binding.textinput, InputMethodManager.SHOW_IMPLICIT);
			}
		}
	}

	private void quoteMessage(Message message) {
		quoteText(MessageUtils.prepareQuote(message));
	}

	@Override
	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
		synchronized (this.messageList) {
			super.onCreateContextMenu(menu, v, menuInfo);
			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
			this.selectedMessage = this.messageList.get(acmi.position);
			populateContextMenu(menu);
		}
	}

	private void populateContextMenu(ContextMenu menu) {
		final Message m = this.selectedMessage;
		final Transferable t = m.getTransferable();
		Message relevantForCorrection = m;
		while (relevantForCorrection.mergeable(relevantForCorrection.next())) {
			relevantForCorrection = relevantForCorrection.next();
		}
		if (m.getType() != Message.TYPE_STATUS) {
			final boolean treatAsFile = m.getType() != Message.TYPE_TEXT
					&& m.getType() != Message.TYPE_PRIVATE
					&& t == null;
			final boolean encrypted = m.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED
					|| m.getEncryption() == Message.ENCRYPTION_PGP;
			activity.getMenuInflater().inflate(R.menu.message_context, menu);
			menu.setHeaderTitle(R.string.message_options);
			MenuItem copyMessage = menu.findItem(R.id.copy_message);
			MenuItem quoteMessage = menu.findItem(R.id.quote_message);
			MenuItem retryDecryption = menu.findItem(R.id.retry_decryption);
			MenuItem correctMessage = menu.findItem(R.id.correct_message);
			MenuItem shareWith = menu.findItem(R.id.share_with);
			MenuItem sendAgain = menu.findItem(R.id.send_again);
			MenuItem copyUrl = menu.findItem(R.id.copy_url);
			MenuItem downloadFile = menu.findItem(R.id.download_file);
			MenuItem cancelTransmission = menu.findItem(R.id.cancel_transmission);
			MenuItem deleteFile = menu.findItem(R.id.delete_file);
			MenuItem showErrorMessage = menu.findItem(R.id.show_error_message);
			if (!treatAsFile && !encrypted && !m.isGeoUri() && !m.treatAsDownloadable()) {
				copyMessage.setVisible(true);
				quoteMessage.setVisible(MessageUtils.prepareQuote(m).length() > 0);
			}
			if (m.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
				retryDecryption.setVisible(true);
			}
			if (relevantForCorrection.getType() == Message.TYPE_TEXT
					&& relevantForCorrection.isLastCorrectableMessage()
					&& (m.getConversation().getMucOptions().nonanonymous() || m.getConversation().getMode() == Conversation.MODE_SINGLE)) {
				correctMessage.setVisible(true);
			}
			if (treatAsFile || (m.getType() == Message.TYPE_TEXT && !m.treatAsDownloadable())) {
				shareWith.setVisible(true);
			}
			if (m.getStatus() == Message.STATUS_SEND_FAILED) {
				sendAgain.setVisible(true);
			}
			if (m.hasFileOnRemoteHost()
					|| m.isGeoUri()
					|| m.treatAsDownloadable()
					|| (t != null && t instanceof HttpDownloadConnection)) {
				copyUrl.setVisible(true);
			}
			if ((m.isFileOrImage() && t instanceof TransferablePlaceholder && m.hasFileOnRemoteHost())) {
				downloadFile.setVisible(true);
				downloadFile.setTitle(activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, m)));
			}
			boolean waitingOfferedSending = m.getStatus() == Message.STATUS_WAITING
					|| m.getStatus() == Message.STATUS_UNSEND
					|| m.getStatus() == Message.STATUS_OFFERED;
			if ((t != null && !(t instanceof TransferablePlaceholder)) || waitingOfferedSending && m.needsUploading()) {
				cancelTransmission.setVisible(true);
			}
			if (treatAsFile) {
				String path = m.getRelativeFilePath();
				if (path == null || !path.startsWith("/")) {
					deleteFile.setVisible(true);
					deleteFile.setTitle(activity.getString(R.string.delete_x_file, UIHelper.getFileDescriptionString(activity, m)));
				}
			}
			if (m.getStatus() == Message.STATUS_SEND_FAILED && m.getErrorMessage() != null) {
				showErrorMessage.setVisible(true);
			}
		}
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		switch (item.getItemId()) {
			case R.id.share_with:
				shareWith(selectedMessage);
				return true;
			case R.id.correct_message:
				correctMessage(selectedMessage);
				return true;
			case R.id.copy_message:
				copyMessage(selectedMessage);
				return true;
			case R.id.quote_message:
				quoteMessage(selectedMessage);
				return true;
			case R.id.send_again:
				resendMessage(selectedMessage);
				return true;
			case R.id.copy_url:
				copyUrl(selectedMessage);
				return true;
			case R.id.download_file:
				downloadFile(selectedMessage);
				return true;
			case R.id.cancel_transmission:
				cancelTransmission(selectedMessage);
				return true;
			case R.id.retry_decryption:
				retryDecryption(selectedMessage);
				return true;
			case R.id.delete_file:
				deleteFile(selectedMessage);
				return true;
			case R.id.show_error_message:
				showErrorMessage(selectedMessage);
				return true;
			default:
				return super.onContextItemSelected(item);
		}
	}

	@Override
	public boolean onOptionsItemSelected(final MenuItem item) {
		if (conversation == null) {
			return super.onOptionsItemSelected(item);
		}
		switch (item.getItemId()) {
			case R.id.encryption_choice_axolotl:
			case R.id.encryption_choice_pgp:
			case R.id.encryption_choice_none:
				handleEncryptionSelection(item);
				break;
			case R.id.attach_choose_picture:
			case R.id.attach_take_picture:
			case R.id.attach_record_video:
			case R.id.attach_choose_file:
			case R.id.attach_record_voice:
			case R.id.attach_location:
				handleAttachmentSelection(item);
				break;
			case R.id.action_archive:
				activity.onConversationArchived(conversation);
				break;
			case R.id.action_contact_details:
				activity.switchToContactDetails(conversation.getContact());
				break;
			case R.id.action_muc_details:
				Intent intent = new Intent(getActivity(), ConferenceDetailsActivity.class);
				intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
				intent.putExtra("uuid", conversation.getUuid());
				startActivity(intent);
				break;
			case R.id.action_invite:
				activity.inviteToConversation(conversation);
				break;
			case R.id.action_clear_history:
				clearHistoryDialog(conversation);
				break;
			case R.id.action_mute:
				muteConversationDialog(conversation);
				break;
			case R.id.action_unmute:
				unmuteConversation(conversation);
				break;
			case R.id.action_block:
			case R.id.action_unblock:
				final Activity activity = getActivity();
				if (activity instanceof XmppActivity) {
					BlockContactDialog.show((XmppActivity) activity, conversation);
				}
				break;
			default:
				break;
		}
		return super.onOptionsItemSelected(item);
	}

	private void handleAttachmentSelection(MenuItem item) {
		switch (item.getItemId()) {
			case R.id.attach_choose_picture:
				attachFile(ATTACHMENT_CHOICE_CHOOSE_IMAGE);
				break;
			case R.id.attach_take_picture:
				attachFile(ATTACHMENT_CHOICE_TAKE_PHOTO);
				break;
			case R.id.attach_record_video:
				attachFile(ATTACHMENT_CHOICE_RECORD_VIDEO);
				break;
			case R.id.attach_choose_file:
				attachFile(ATTACHMENT_CHOICE_CHOOSE_FILE);
				break;
			case R.id.attach_record_voice:
				attachFile(ATTACHMENT_CHOICE_RECORD_VOICE);
				break;
			case R.id.attach_location:
				attachFile(ATTACHMENT_CHOICE_LOCATION);
				break;
		}
	}

	private void handleEncryptionSelection(MenuItem item) {
		if (conversation == null) {
			return;
		}
		switch (item.getItemId()) {
			case R.id.encryption_choice_none:
				conversation.setNextEncryption(Message.ENCRYPTION_NONE);
				item.setChecked(true);
				break;
			case R.id.encryption_choice_pgp:
				if (activity.hasPgp()) {
					if (conversation.getAccount().getPgpSignature() != null) {
						conversation.setNextEncryption(Message.ENCRYPTION_PGP);
						item.setChecked(true);
					} else {
						activity.announcePgp(conversation.getAccount(), conversation, null, activity.onOpenPGPKeyPublished);
					}
				} else {
					activity.showInstallPgpDialog();
				}
				break;
			case R.id.encryption_choice_axolotl:
				Log.d(Config.LOGTAG, AxolotlService.getLogprefix(conversation.getAccount())
						+ "Enabled axolotl for Contact " + conversation.getContact().getJid());
				conversation.setNextEncryption(Message.ENCRYPTION_AXOLOTL);
				item.setChecked(true);
				break;
			default:
				conversation.setNextEncryption(Message.ENCRYPTION_NONE);
				break;
		}
		activity.xmppConnectionService.updateConversation(conversation);
		updateChatMsgHint();
		getActivity().invalidateOptionsMenu();
		activity.refreshUi();
	}

	public void attachFile(final int attachmentChoice) {
		if (attachmentChoice != ATTACHMENT_CHOICE_LOCATION) {
			if (!Config.ONLY_INTERNAL_STORAGE && !activity.hasStoragePermission(attachmentChoice)) {
				return;
			}
		}
		try {
			activity.getPreferences().edit()
					.putString(RECENTLY_USED_QUICK_ACTION, SendButtonAction.of(attachmentChoice).toString())
					.apply();
		} catch (IllegalArgumentException e) {
			//just do not save
		}
		final int encryption = conversation.getNextEncryption();
		final int mode = conversation.getMode();
		if (encryption == Message.ENCRYPTION_PGP) {
			if (activity.hasPgp()) {
				if (mode == Conversation.MODE_SINGLE && conversation.getContact().getPgpKeyId() != 0) {
					activity.xmppConnectionService.getPgpEngine().hasKey(
							conversation.getContact(),
							new UiCallback<Contact>() {

								@Override
								public void userInputRequried(PendingIntent pi, Contact contact) {
									startPendingIntent(pi, attachmentChoice);
								}

								@Override
								public void success(Contact contact) {
									selectPresenceToAttachFile(attachmentChoice);
								}

								@Override
								public void error(int error, Contact contact) {
									activity.replaceToast(getString(error));
								}
							});
				} else if (mode == Conversation.MODE_MULTI && conversation.getMucOptions().pgpKeysInUse()) {
					if (!conversation.getMucOptions().everybodyHasKeys()) {
						Toast warning = Toast.makeText(getActivity(), R.string.missing_public_keys, Toast.LENGTH_LONG);
						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
						warning.show();
					}
					selectPresenceToAttachFile(attachmentChoice);
				} else {
					final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
							.findFragmentByTag("conversation");
					if (fragment != null) {
						fragment.showNoPGPKeyDialog(false, (dialog, which) -> {
							conversation.setNextEncryption(Message.ENCRYPTION_NONE);
							activity.xmppConnectionService.updateConversation(conversation);
							selectPresenceToAttachFile(attachmentChoice);
						});
					}
				}
			} else {
				activity.showInstallPgpDialog();
			}
		} else {
			if (encryption != Message.ENCRYPTION_AXOLOTL || !trustKeysIfNeeded(REQUEST_TRUST_KEYS_MENU, attachmentChoice)) {
				selectPresenceToAttachFile(attachmentChoice);
			}
		}
	}

	@Override
	public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
		if (grantResults.length > 0)
			if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
				if (requestCode == REQUEST_START_DOWNLOAD) {
					if (this.mPendingDownloadableMessage != null) {
						startDownloadable(this.mPendingDownloadableMessage);
					}
				} else if (requestCode == REQUEST_ADD_EDITOR_CONTENT) {
					if (this.mPendingEditorContent != null) {
						attachImageToConversation(this.mPendingEditorContent);
					}
				} else {
					attachFile(requestCode);
				}
			} else {
				Toast.makeText(getActivity(), R.string.no_storage_permission, Toast.LENGTH_SHORT).show();
			}
	}

	public void startDownloadable(Message message) {
		if (!Config.ONLY_INTERNAL_STORAGE && !activity.hasStoragePermission(REQUEST_START_DOWNLOAD)) {
			this.mPendingDownloadableMessage = message;
			return;
		}
		Transferable transferable = message.getTransferable();
		if (transferable != null) {
			if (!transferable.start()) {
				Toast.makeText(getActivity(), R.string.not_connected_try_again, Toast.LENGTH_SHORT).show();
			}
		} else if (message.treatAsDownloadable()) {
			activity.xmppConnectionService.getHttpConnectionManager().createNewDownloadConnection(message, true);
		}
	}

	@SuppressLint("InflateParams")
	protected void clearHistoryDialog(final Conversation conversation) {
		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
		builder.setTitle(getString(R.string.clear_conversation_history));
		final View dialogView = getActivity().getLayoutInflater().inflate(R.layout.dialog_clear_history, null);
		final CheckBox endConversationCheckBox = dialogView.findViewById(R.id.end_conversation_checkbox);
		builder.setView(dialogView);
		builder.setNegativeButton(getString(R.string.cancel), null);
		builder.setPositiveButton(getString(R.string.delete_messages), (dialog, which) -> {
			this.activity.xmppConnectionService.clearConversationHistory(conversation);
			if (endConversationCheckBox.isChecked()) {
				this.activity.onConversationArchived(conversation);
			} else {
				activity.onConversationsListItemUpdated();
				refresh();
			}
		});
		builder.create().show();
	}

	protected void muteConversationDialog(final Conversation conversation) {
		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
		builder.setTitle(R.string.disable_notifications);
		final int[] durations = getResources().getIntArray(R.array.mute_options_durations);
		builder.setItems(R.array.mute_options_descriptions, (dialog, which) -> {
			final long till;
			if (durations[which] == -1) {
				till = Long.MAX_VALUE;
			} else {
				till = System.currentTimeMillis() + (durations[which] * 1000);
			}
			conversation.setMutedTill(till);
			activity.xmppConnectionService.updateConversation(conversation);
			activity.onConversationsListItemUpdated();
			refresh();
			getActivity().invalidateOptionsMenu();
		});
		builder.create().show();
	}

	public void unmuteConversation(final Conversation conversation) {
		conversation.setMutedTill(0);
		this.activity.xmppConnectionService.updateConversation(conversation);
		this.activity.onConversationsListItemUpdated();
		refresh();
		getActivity().invalidateOptionsMenu();
	}

	protected void selectPresenceToAttachFile(final int attachmentChoice) {
		final Account account = conversation.getAccount();
		final PresenceSelector.OnPresenceSelected callback = () -> {
			Intent intent = new Intent();
			boolean chooser = false;
			String fallbackPackageId = null;
			switch (attachmentChoice) {
				case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
					intent.setAction(Intent.ACTION_GET_CONTENT);
					if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
						intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
					}
					intent.setType("image/*");
					chooser = true;
					break;
				case ATTACHMENT_CHOICE_RECORD_VIDEO:
					intent.setAction(MediaStore.ACTION_VIDEO_CAPTURE);
					break;
				case ATTACHMENT_CHOICE_TAKE_PHOTO:
					Uri uri = activity.xmppConnectionService.getFileBackend().getTakePhotoUri();
					//TODO save photo uri
					//mPendingImageUris.clear();
					//mPendingImageUris.add(uri);
					intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
					intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
					intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
					intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
					break;
				case ATTACHMENT_CHOICE_CHOOSE_FILE:
					chooser = true;
					intent.setType("*/*");
					intent.addCategory(Intent.CATEGORY_OPENABLE);
					intent.setAction(Intent.ACTION_GET_CONTENT);
					break;
				case ATTACHMENT_CHOICE_RECORD_VOICE:
					intent.setAction(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
					fallbackPackageId = "eu.siacs.conversations.voicerecorder";
					break;
				case ATTACHMENT_CHOICE_LOCATION:
					intent.setAction("eu.siacs.conversations.location.request");
					fallbackPackageId = "eu.siacs.conversations.sharelocation";
					break;
			}
			if (intent.resolveActivity(getActivity().getPackageManager()) != null) {
				if (chooser) {
					startActivityForResult(
							Intent.createChooser(intent, getString(R.string.perform_action_with)),
							attachmentChoice);
				} else {
					startActivityForResult(intent, attachmentChoice);
				}
			} else if (fallbackPackageId != null) {
				startActivity(getInstallApkIntent(fallbackPackageId));
			}
		};
		if (account.httpUploadAvailable() || attachmentChoice == ATTACHMENT_CHOICE_LOCATION) {
			conversation.setNextCounterpart(null);
			callback.onPresenceSelected();
		} else {
			activity.selectPresence(conversation, callback);
		}
	}

	private Intent getInstallApkIntent(final String packageId) {
		Intent intent = new Intent(Intent.ACTION_VIEW);
		intent.setData(Uri.parse("market://details?id=" + packageId));
		if (intent.resolveActivity(getActivity().getPackageManager()) != null) {
			return intent;
		} else {
			intent.setData(Uri.parse("http://play.google.com/store/apps/details?id=" + packageId));
			return intent;
		}
	}

	@Override
	public void onResume() {
		new Handler().post(() -> {
			final PackageManager packageManager = getActivity().getPackageManager();
			ConversationMenuConfigurator.updateAttachmentAvailability(packageManager);
			getActivity().invalidateOptionsMenu();
		});
		super.onResume();
	}

	private void showErrorMessage(final Message message) {
		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
		builder.setTitle(R.string.error_message);
		builder.setMessage(message.getErrorMessage());
		builder.setPositiveButton(R.string.confirm, null);
		builder.create().show();
	}

	private void shareWith(Message message) {
		Intent shareIntent = new Intent();
		shareIntent.setAction(Intent.ACTION_SEND);
		if (message.isGeoUri()) {
			shareIntent.putExtra(Intent.EXTRA_TEXT, message.getBody());
			shareIntent.setType("text/plain");
		} else if (!message.isFileOrImage()) {
			shareIntent.putExtra(Intent.EXTRA_TEXT, message.getMergedBody().toString());
			shareIntent.setType("text/plain");
		} else {
			final DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
			try {
				shareIntent.putExtra(Intent.EXTRA_STREAM, FileBackend.getUriForFile(getActivity(), file));
			} catch (SecurityException e) {
				Toast.makeText(getActivity(), activity.getString(R.string.no_permission_to_access_x, file.getAbsolutePath()), Toast.LENGTH_SHORT).show();
				return;
			}
			shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
			String mime = message.getMimeType();
			if (mime == null) {
				mime = "*/*";
			}
			shareIntent.setType(mime);
		}
		try {
			startActivity(Intent.createChooser(shareIntent, getText(R.string.share_with)));
		} catch (ActivityNotFoundException e) {
			//This should happen only on faulty androids because normally chooser is always available
			Toast.makeText(getActivity(), R.string.no_application_found_to_open_file, Toast.LENGTH_SHORT).show();
		}
	}

	private void copyMessage(Message message) {
		if (activity.copyTextToClipboard(message.getMergedBody().toString(), R.string.message)) {
			Toast.makeText(getActivity(), R.string.message_copied_to_clipboard, Toast.LENGTH_SHORT).show();
		}
	}

	private void deleteFile(Message message) {
		if (activity.xmppConnectionService.getFileBackend().deleteFile(message)) {
			message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
			activity.onConversationsListItemUpdated();
			refresh();
		}
	}

	private void resendMessage(final Message message) {
		if (message.isFileOrImage()) {
			DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
			if (file.exists()) {
				final Conversation conversation = message.getConversation();
				final XmppConnection xmppConnection = conversation.getAccount().getXmppConnection();
				if (!message.hasFileOnRemoteHost()
						&& xmppConnection != null
						&& !xmppConnection.getFeatures().httpUpload(message.getFileParams().size)) {
					activity.selectPresence(conversation, () -> {
						message.setCounterpart(conversation.getNextCounterpart());
						activity.xmppConnectionService.resendFailedMessages(message);
					});
					return;
				}
			} else {
				Toast.makeText(activity, R.string.file_deleted, Toast.LENGTH_SHORT).show();
				message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
				activity.onConversationsListItemUpdated();
				refresh();
				return;
			}
		}
		activity.xmppConnectionService.resendFailedMessages(message);
	}

	private void copyUrl(Message message) {
		final String url;
		final int resId;
		if (message.isGeoUri()) {
			resId = R.string.location;
			url = message.getBody();
		} else if (message.hasFileOnRemoteHost()) {
			resId = R.string.file_url;
			url = message.getFileParams().url.toString();
		} else {
			url = message.getBody().trim();
			resId = R.string.file_url;
		}
		if (activity.copyTextToClipboard(url, resId)) {
			Toast.makeText(getActivity(), R.string.url_copied_to_clipboard, Toast.LENGTH_SHORT).show();
		}
	}

	private void downloadFile(Message message) {
		activity.xmppConnectionService.getHttpConnectionManager().createNewDownloadConnection(message, true);
	}

	private void cancelTransmission(Message message) {
		Transferable transferable = message.getTransferable();
		if (transferable != null) {
			transferable.cancel();
		} else if (message.getStatus() != Message.STATUS_RECEIVED) {
			activity.xmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
		}
	}

	private void retryDecryption(Message message) {
		message.setEncryption(Message.ENCRYPTION_PGP);
		activity.onConversationsListItemUpdated();
		refresh();
		conversation.getAccount().getPgpDecryptionService().decrypt(message, false);
	}

	protected void privateMessageWith(final Jid counterpart) {
		if (conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
			activity.xmppConnectionService.sendChatState(conversation);
		}
		this.binding.textinput.setText("");
		this.conversation.setNextCounterpart(counterpart);
		updateChatMsgHint();
		updateSendButton();
		updateEditablity();
	}

	private void correctMessage(Message message) {
		while (message.mergeable(message.next())) {
			message = message.next();
		}
		this.conversation.setCorrectingMessage(message);
		final Editable editable = binding.textinput.getText();
		this.conversation.setDraftMessage(editable.toString());
		this.binding.textinput.setText("");
		this.binding.textinput.append(message.getBody());

	}

	protected void highlightInConference(String nick) {
		final Editable editable = this.binding.textinput.getText();
		String oldString = editable.toString().trim();
		final int pos = this.binding.textinput.getSelectionStart();
		if (oldString.isEmpty() || pos == 0) {
			editable.insert(0, nick + ": ");
		} else {
			final char before = editable.charAt(pos - 1);
			final char after = editable.length() > pos ? editable.charAt(pos) : '\0';
			if (before == '\n') {
				editable.insert(pos, nick + ": ");
			} else {
				if (pos > 2 && editable.subSequence(pos - 2, pos).toString().equals(": ")) {
					if (NickValidityChecker.check(conversation, Arrays.asList(editable.subSequence(0, pos - 2).toString().split(", ")))) {
						editable.insert(pos - 2, ", " + nick);
						return;
					}
				}
				editable.insert(pos, (Character.isWhitespace(before) ? "" : " ") + nick + (Character.isWhitespace(after) ? "" : " "));
				if (Character.isWhitespace(after)) {
					this.binding.textinput.setSelection(this.binding.textinput.getSelectionStart() + 1);
				}
			}
		}
	}


	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		if (conversation != null) {
			outState.putString(STATE_CONVERSATION_UUID, conversation.getUuid());
		}
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		Log.d(Config.LOGTAG,"ConversationFragment.onActivityCreated()");
		super.onActivityCreated(savedInstanceState);
		if (savedInstanceState == null) {
			return;
		}
		String uuid = savedInstanceState.getString(STATE_CONVERSATION_UUID);
		if (uuid != null) {
			this.pendingConversationsUuid.push(uuid);
		}
	}

	@Override
	public void onStart() {
		super.onStart();
		reInit(conversation);
	}

	@Override
	public void onStop() {
		super.onStop();
		final Activity activity = getActivity();
		if (activity == null || !activity.isChangingConfigurations()) {
			messageListAdapter.stopAudioPlayer();
		}
		if (this.conversation != null) {
			final String msg = this.binding.textinput.getText().toString();
			if (this.conversation.setNextMessage(msg)) {
				this.activity.xmppConnectionService.updateConversation(this.conversation);
			}
			updateChatState(this.conversation, msg);
		}
	}

	private void updateChatState(final Conversation conversation, final String msg) {
		ChatState state = msg.length() == 0 ? Config.DEFAULT_CHATSTATE : ChatState.PAUSED;
		Account.State status = conversation.getAccount().getStatus();
		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(state)) {
			activity.xmppConnectionService.sendChatState(conversation);
		}
	}

	public void reInit(Conversation conversation) {
		Log.d(Config.LOGTAG, "reInit()");
		if (conversation == null) {
			Log.d(Config.LOGTAG, "conversation was null :(");
			return;
		}

		if (this.activity == null) {
			Log.d(Config.LOGTAG, "activity was null");
			this.conversation = conversation;
			return;
		}

		setupIme();
		if (this.conversation != null) {
			final String msg = this.binding.textinput.getText().toString();
			if (this.conversation.setNextMessage(msg)) {
				activity.xmppConnectionService.updateConversation(conversation);
			}
			if (this.conversation != conversation) {
				updateChatState(this.conversation, msg);
				messageListAdapter.stopAudioPlayer();
			}
			this.conversation.trim();

		}

		if (activity != null) {
			this.binding.textSendButton.setContentDescription(activity.getString(R.string.send_message_to_x, conversation.getName()));
		}

		this.conversation = conversation;
		this.binding.textinput.setKeyboardListener(null);
		this.binding.textinput.setText("");
		this.binding.textinput.append(this.conversation.getNextMessage());
		this.binding.textinput.setKeyboardListener(this);
		messageListAdapter.updatePreferences();
		this.binding.messagesView.setAdapter(messageListAdapter);
		refresh(false);
		this.conversation.messagesLoaded.set(true);
		final boolean isAtBottom;
		synchronized (this.messageList) {
			final Message first = conversation.getFirstUnreadMessage();
			final int bottom = Math.max(0, this.messageList.size() - 1);
			final int pos;
			if (first == null) {
				pos = bottom;
			} else {
				int i = getIndexOf(first.getUuid(), this.messageList);
				pos = i < 0 ? bottom : i;
			}
			this.binding.messagesView.setSelection(pos);
			isAtBottom = pos == bottom;
		}
		if (activity != null) {
			activity.onConversationRead(this.conversation);
		}
	}

	private boolean showBlockSubmenu(View view) {
		final Jid jid = conversation.getJid();
		if (jid.isDomainJid()) {
			BlockContactDialog.show(activity, conversation);
		} else {
			PopupMenu popupMenu = new PopupMenu(getActivity(), view);
			popupMenu.inflate(R.menu.block);
			popupMenu.setOnMenuItemClickListener(menuItem -> {
				Blockable blockable;
				switch (menuItem.getItemId()) {
					case R.id.block_domain:
						blockable = conversation.getAccount().getRoster().getContact(jid.toDomainJid());
						break;
					default:
						blockable = conversation;
				}
				BlockContactDialog.show(activity, blockable);
				return true;
			});
			popupMenu.show();
		}
		return true;
	}

	private void updateSnackBar(final Conversation conversation) {
		final Account account = conversation.getAccount();
		final XmppConnection connection = account.getXmppConnection();
		final int mode = conversation.getMode();
		final Contact contact = mode == Conversation.MODE_SINGLE ? conversation.getContact() : null;
		if (account.getStatus() == Account.State.DISABLED) {
			showSnackbar(R.string.this_account_is_disabled, R.string.enable, this.mEnableAccountListener);
		} else if (conversation.isBlocked()) {
			showSnackbar(R.string.contact_blocked, R.string.unblock, this.mUnblockClickListener);
		} else if (contact != null && !contact.showInRoster() && contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
			showSnackbar(R.string.contact_added_you, R.string.add_back, this.mAddBackClickListener, this.mLongPressBlockListener);
		} else if (contact != null && contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
			showSnackbar(R.string.contact_asks_for_presence_subscription, R.string.allow, this.mAllowPresenceSubscription, this.mLongPressBlockListener);
		} else if (mode == Conversation.MODE_MULTI
				&& !conversation.getMucOptions().online()
				&& account.getStatus() == Account.State.ONLINE) {
			switch (conversation.getMucOptions().getError()) {
				case NICK_IN_USE:
					showSnackbar(R.string.nick_in_use, R.string.edit, clickToMuc);
					break;
				case NO_RESPONSE:
					showSnackbar(R.string.joining_conference, 0, null);
					break;
				case SERVER_NOT_FOUND:
					if (conversation.receivedMessagesCount() > 0) {
						showSnackbar(R.string.remote_server_not_found, R.string.try_again, joinMuc);
					} else {
						showSnackbar(R.string.remote_server_not_found, R.string.leave, leaveMuc);
					}
					break;
				case PASSWORD_REQUIRED:
					showSnackbar(R.string.conference_requires_password, R.string.enter_password, enterPassword);
					break;
				case BANNED:
					showSnackbar(R.string.conference_banned, R.string.leave, leaveMuc);
					break;
				case MEMBERS_ONLY:
					showSnackbar(R.string.conference_members_only, R.string.leave, leaveMuc);
					break;
				case KICKED:
					showSnackbar(R.string.conference_kicked, R.string.join, joinMuc);
					break;
				case UNKNOWN:
					showSnackbar(R.string.conference_unknown_error, R.string.try_again, joinMuc);
					break;
				case INVALID_NICK:
					showSnackbar(R.string.invalid_muc_nick, R.string.edit, clickToMuc);
				case SHUTDOWN:
					showSnackbar(R.string.conference_shutdown, R.string.try_again, joinMuc);
					break;
				default:
					hideSnackbar();
					break;
			}
		} else if (account.hasPendingPgpIntent(conversation)) {
			showSnackbar(R.string.openpgp_messages_found, R.string.decrypt, clickToDecryptListener);
		} else if (connection != null
				&& connection.getFeatures().blocking()
				&& conversation.countMessages() != 0
				&& !conversation.isBlocked()
				&& conversation.isWithStranger()) {
			showSnackbar(R.string.received_message_from_stranger, R.string.block, mBlockClickListener);
		} else {
			hideSnackbar();
		}
	}

	@Override
	public void refresh() {
		this.refresh(true);
	}


	private void refresh(boolean notifyConversationRead) {
		synchronized (this.messageList) {
			if (this.conversation != null) {
				conversation.populateWithMessages(this.messageList);
				updateSnackBar(conversation);
				updateStatusMessages();
				this.messageListAdapter.notifyDataSetChanged();
				updateChatMsgHint();
				if (notifyConversationRead && activity != null) {
					activity.onConversationRead(this.conversation);
				}
				updateSendButton();
				updateEditablity();
			}
		}
	}

	protected void messageSent() {
		mSendingPgpMessage.set(false);
		this.binding.textinput.setText("");
		if (conversation.setCorrectingMessage(null)) {
			this.binding.textinput.append(conversation.getDraftMessage());
			conversation.setDraftMessage(null);
		}
		if (conversation.setNextMessage(this.binding.textinput.getText().toString())) {
			activity.xmppConnectionService.updateConversation(conversation);
		}
		updateChatMsgHint();
		new Handler().post(() -> {
			int size = messageList.size();
			this.binding.messagesView.setSelection(size - 1);
		});
	}

	public void setFocusOnInputField() {
		this.binding.textinput.requestFocus();
	}

	public void doneSendingPgpMessage() {
		mSendingPgpMessage.set(false);
	}

	public long getMaxHttpUploadSize(Conversation conversation) {
		final XmppConnection connection = conversation.getAccount().getXmppConnection();
		return connection == null ? -1 : connection.getFeatures().getMaxHttpUploadSize();
	}

	private void updateEditablity() {
		boolean canWrite = this.conversation.getMode() == Conversation.MODE_SINGLE || this.conversation.getMucOptions().participating() || this.conversation.getNextCounterpart() != null;
		this.binding.textinput.setFocusable(canWrite);
		this.binding.textinput.setFocusableInTouchMode(canWrite);
		this.binding.textSendButton.setEnabled(canWrite);
		this.binding.textinput.setCursorVisible(canWrite);
	}

	public void updateSendButton() {
		boolean useSendButtonToIndicateStatus = PreferenceManager.getDefaultSharedPreferences(getActivity()).getBoolean("send_button_status", getResources().getBoolean(R.bool.send_button_status));
		final Conversation c = this.conversation;
		final Presence.Status status;
		final String text = this.binding.textinput == null ? "" : this.binding.textinput.getText().toString();
		final SendButtonAction action = SendButtonTool.getAction(getActivity(), c, text);
		if (useSendButtonToIndicateStatus && c.getAccount().getStatus() == Account.State.ONLINE) {
			if (activity.xmppConnectionService != null && activity.xmppConnectionService.getMessageArchiveService().isCatchingUp(c)) {
				status = Presence.Status.OFFLINE;
			} else if (c.getMode() == Conversation.MODE_SINGLE) {
				status = c.getContact().getShownStatus();
			} else {
				status = c.getMucOptions().online() ? Presence.Status.ONLINE : Presence.Status.OFFLINE;
			}
		} else {
			status = Presence.Status.OFFLINE;
		}
		this.binding.textSendButton.setTag(action);
		this.binding.textSendButton.setImageResource(SendButtonTool.getSendButtonImageResource(getActivity(), action, status));
	}

	protected void updateDateSeparators() {
		synchronized (this.messageList) {
			for (int i = 0; i < this.messageList.size(); ++i) {
				final Message current = this.messageList.get(i);
				if (i == 0 || !UIHelper.sameDay(this.messageList.get(i - 1).getTimeSent(), current.getTimeSent())) {
					this.messageList.add(i, Message.createDateSeparator(current));
					i++;
				}
			}
		}
	}

	protected void updateStatusMessages() {
		updateDateSeparators();
		synchronized (this.messageList) {
			if (showLoadMoreMessages(conversation)) {
				this.messageList.add(0, Message.createLoadMoreMessage(conversation));
			}
			if (conversation.getMode() == Conversation.MODE_SINGLE) {
				ChatState state = conversation.getIncomingChatState();
				if (state == ChatState.COMPOSING) {
					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_is_typing, conversation.getName())));
				} else if (state == ChatState.PAUSED) {
					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_has_stopped_typing, conversation.getName())));
				} else {
					for (int i = this.messageList.size() - 1; i >= 0; --i) {
						if (this.messageList.get(i).getStatus() == Message.STATUS_RECEIVED) {
							return;
						} else {
							if (this.messageList.get(i).getStatus() == Message.STATUS_SEND_DISPLAYED) {
								this.messageList.add(i + 1,
										Message.createStatusMessage(conversation, getString(R.string.contact_has_read_up_to_this_point, conversation.getName())));
								return;
							}
						}
					}
				}
			} else {
				final MucOptions mucOptions = conversation.getMucOptions();
				final List<MucOptions.User> allUsers = mucOptions.getUsers();
				final Set<ReadByMarker> addedMarkers = new HashSet<>();
				ChatState state = ChatState.COMPOSING;
				List<MucOptions.User> users = conversation.getMucOptions().getUsersWithChatState(state, 5);
				if (users.size() == 0) {
					state = ChatState.PAUSED;
					users = conversation.getMucOptions().getUsersWithChatState(state, 5);
				}
				if (mucOptions.isPrivateAndNonAnonymous()) {
					for (int i = this.messageList.size() - 1; i >= 0; --i) {
						final Set<ReadByMarker> markersForMessage = messageList.get(i).getReadByMarkers();
						final List<MucOptions.User> shownMarkers = new ArrayList<>();
						for (ReadByMarker marker : markersForMessage) {
							if (!ReadByMarker.contains(marker, addedMarkers)) {
								addedMarkers.add(marker); //may be put outside this condition. set should do dedup anyway
								MucOptions.User user = mucOptions.findUser(marker);
								if (user != null && !users.contains(user)) {
									shownMarkers.add(user);
								}
							}
						}
						final ReadByMarker markerForSender = ReadByMarker.from(messageList.get(i));
						final Message statusMessage;
						final int size = shownMarkers.size();
						if (size > 1) {
							final String body;
							if (size <= 4) {
								body = getString(R.string.contacts_have_read_up_to_this_point, UIHelper.concatNames(shownMarkers));
							} else {
								body = getString(R.string.contacts_and_n_more_have_read_up_to_this_point, UIHelper.concatNames(shownMarkers, 3), size - 3);
							}
							statusMessage = Message.createStatusMessage(conversation, body);
							statusMessage.setCounterparts(shownMarkers);
						} else if (size == 1) {
							statusMessage = Message.createStatusMessage(conversation, getString(R.string.contact_has_read_up_to_this_point, UIHelper.getDisplayName(shownMarkers.get(0))));
							statusMessage.setCounterpart(shownMarkers.get(0).getFullJid());
							statusMessage.setTrueCounterpart(shownMarkers.get(0).getRealJid());
						} else {
							statusMessage = null;
						}
						if (statusMessage != null) {
							this.messageList.add(i + 1, statusMessage);
						}
						addedMarkers.add(markerForSender);
						if (ReadByMarker.allUsersRepresented(allUsers, addedMarkers)) {
							break;
						}
					}
				}
				if (users.size() > 0) {
					Message statusMessage;
					if (users.size() == 1) {
						MucOptions.User user = users.get(0);
						int id = state == ChatState.COMPOSING ? R.string.contact_is_typing : R.string.contact_has_stopped_typing;
						statusMessage = Message.createStatusMessage(conversation, getString(id, UIHelper.getDisplayName(user)));
						statusMessage.setTrueCounterpart(user.getRealJid());
						statusMessage.setCounterpart(user.getFullJid());
					} else {
						int id = state == ChatState.COMPOSING ? R.string.contacts_are_typing : R.string.contacts_have_stopped_typing;
						statusMessage = Message.createStatusMessage(conversation, getString(id, UIHelper.concatNames(users)));
						statusMessage.setCounterparts(users);
					}
					this.messageList.add(statusMessage);
				}

			}
		}
	}

	public void stopScrolling() {
		long now = SystemClock.uptimeMillis();
		MotionEvent cancel = MotionEvent.obtain(now, now, MotionEvent.ACTION_CANCEL, 0, 0, 0);
		binding.messagesView.dispatchTouchEvent(cancel);
	}

	private boolean showLoadMoreMessages(final Conversation c) {
		final boolean mam = hasMamSupport(c) && !c.getContact().isBlocked();
		final MessageArchiveService service = activity.xmppConnectionService.getMessageArchiveService();
		return mam && (c.getLastClearHistory().getTimestamp() != 0 || (c.countMessages() == 0 && c.messagesLoaded.get() && c.hasMessagesLeftOnServer() && !service.queryInProgress(c)));
	}

	private boolean hasMamSupport(final Conversation c) {
		if (c.getMode() == Conversation.MODE_SINGLE) {
			final XmppConnection connection = c.getAccount().getXmppConnection();
			return connection != null && connection.getFeatures().mam();
		} else {
			return c.getMucOptions().mamSupport();
		}
	}

	protected void showSnackbar(final int message, final int action, final OnClickListener clickListener) {
		showSnackbar(message, action, clickListener, null);
	}

	protected void showSnackbar(final int message, final int action, final OnClickListener clickListener, final View.OnLongClickListener longClickListener) {
		this.binding.snackbar.setVisibility(View.VISIBLE);
		this.binding.snackbar.setOnClickListener(null);
		this.binding.snackbarMessage.setText(message);
		this.binding.snackbarMessage.setOnClickListener(null);
		this.binding.snackbarAction.setVisibility(clickListener == null ? View.GONE : View.VISIBLE);
		if (action != 0) {
			this.binding.snackbarAction.setText(action);
		}
		this.binding.snackbarAction.setOnClickListener(clickListener);
		this.binding.snackbarAction.setOnLongClickListener(longClickListener);
	}

	protected void hideSnackbar() {
		this.binding.snackbar.setVisibility(View.GONE);
	}

	protected void sendPlainTextMessage(Message message) {
		activity.xmppConnectionService.sendMessage(message);
		messageSent();
	}

	protected void sendPgpMessage(final Message message) {
		final XmppConnectionService xmppService = activity.xmppConnectionService;
		final Contact contact = message.getConversation().getContact();
		if (!activity.hasPgp()) {
			activity.showInstallPgpDialog();
			return;
		}
		if (conversation.getAccount().getPgpSignature() == null) {
			activity.announcePgp(conversation.getAccount(), conversation, null, activity.onOpenPGPKeyPublished);
			return;
		}
		if (!mSendingPgpMessage.compareAndSet(false, true)) {
			Log.d(Config.LOGTAG, "sending pgp message already in progress");
		}
		if (conversation.getMode() == Conversation.MODE_SINGLE) {
			if (contact.getPgpKeyId() != 0) {
				xmppService.getPgpEngine().hasKey(contact,
						new UiCallback<Contact>() {

							@Override
							public void userInputRequried(PendingIntent pi, Contact contact) {
								startPendingIntent(pi, REQUEST_ENCRYPT_MESSAGE);
							}

							@Override
							public void success(Contact contact) {
								encryptTextMessage(message);
							}

							@Override
							public void error(int error, Contact contact) {
								activity.runOnUiThread(() -> Toast.makeText(activity,
										R.string.unable_to_connect_to_keychain,
										Toast.LENGTH_SHORT
								).show());
								mSendingPgpMessage.set(false);
							}
						});

			} else {
				showNoPGPKeyDialog(false, (dialog, which) -> {
					conversation.setNextEncryption(Message.ENCRYPTION_NONE);
					xmppService.updateConversation(conversation);
					message.setEncryption(Message.ENCRYPTION_NONE);
					xmppService.sendMessage(message);
					messageSent();
				});
			}
		} else {
			if (conversation.getMucOptions().pgpKeysInUse()) {
				if (!conversation.getMucOptions().everybodyHasKeys()) {
					Toast warning = Toast
							.makeText(getActivity(),
									R.string.missing_public_keys,
									Toast.LENGTH_LONG);
					warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
					warning.show();
				}
				encryptTextMessage(message);
			} else {
				showNoPGPKeyDialog(true, (dialog, which) -> {
					conversation.setNextEncryption(Message.ENCRYPTION_NONE);
					message.setEncryption(Message.ENCRYPTION_NONE);
					xmppService.updateConversation(conversation);
					xmppService.sendMessage(message);
					messageSent();
				});
			}
		}
	}

	public void encryptTextMessage(Message message) {
		activity.xmppConnectionService.getPgpEngine().encrypt(message,
				new UiCallback<Message>() {

					@Override
					public void userInputRequried(PendingIntent pi, Message message) {
						startPendingIntent(pi, REQUEST_SEND_MESSAGE);
					}

					@Override
					public void success(Message message) {
						message.setEncryption(Message.ENCRYPTION_DECRYPTED);
						activity.xmppConnectionService.sendMessage(message);
						getActivity().runOnUiThread(() -> messageSent());
					}

					@Override
					public void error(final int error, Message message) {
						getActivity().runOnUiThread(() -> {
							doneSendingPgpMessage();
							Toast.makeText(getActivity(), R.string.unable_to_connect_to_keychain, Toast.LENGTH_SHORT).show();
						});

					}
				});
	}

	public void showNoPGPKeyDialog(boolean plural, DialogInterface.OnClickListener listener) {
		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
		builder.setIconAttribute(android.R.attr.alertDialogIcon);
		if (plural) {
			builder.setTitle(getString(R.string.no_pgp_keys));
			builder.setMessage(getText(R.string.contacts_have_no_pgp_keys));
		} else {
			builder.setTitle(getString(R.string.no_pgp_key));
			builder.setMessage(getText(R.string.contact_has_no_pgp_key));
		}
		builder.setNegativeButton(getString(R.string.cancel), null);
		builder.setPositiveButton(getString(R.string.send_unencrypted), listener);
		builder.create().show();
	}

	protected void sendAxolotlMessage(final Message message) {
		activity.xmppConnectionService.sendMessage(message);
		messageSent();
	}

	public void appendText(String text) {
		if (text == null) {
			return;
		}
		String previous = this.binding.textinput.getText().toString();
		if (previous.length() != 0 && !previous.endsWith(" ")) {
			text = " " + text;
		}
		this.binding.textinput.append(text);
	}

	@Override
	public boolean onEnterPressed() {
		SharedPreferences p = PreferenceManager.getDefaultSharedPreferences(getActivity());
		final boolean enterIsSend = p.getBoolean("enter_is_send", getResources().getBoolean(R.bool.enter_is_send));
		if (enterIsSend) {
			sendMessage();
			return true;
		} else {
			return false;
		}
	}

	@Override
	public void onTypingStarted() {
		Account.State status = conversation.getAccount().getStatus();
		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.COMPOSING)) {
			activity.xmppConnectionService.sendChatState(conversation);
		}
		updateSendButton();
	}

	@Override
	public void onTypingStopped() {
		Account.State status = conversation.getAccount().getStatus();
		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.PAUSED)) {
			activity.xmppConnectionService.sendChatState(conversation);
		}
	}

	@Override
	public void onTextDeleted() {
		Account.State status = conversation.getAccount().getStatus();
		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
			activity.xmppConnectionService.sendChatState(conversation);
		}
		updateSendButton();
	}

	@Override
	public void onTextChanged() {
		if (conversation != null && conversation.getCorrectingMessage() != null) {
			updateSendButton();
		}
	}

	@Override
	public boolean onTabPressed(boolean repeated) {
		if (conversation == null || conversation.getMode() == Conversation.MODE_SINGLE) {
			return false;
		}
		if (repeated) {
			completionIndex++;
		} else {
			lastCompletionLength = 0;
			completionIndex = 0;
			final String content = this.binding.textinput.getText().toString();
			lastCompletionCursor = this.binding.textinput.getSelectionEnd();
			int start = lastCompletionCursor > 0 ? content.lastIndexOf(" ", lastCompletionCursor - 1) + 1 : 0;
			firstWord = start == 0;
			incomplete = content.substring(start, lastCompletionCursor);
		}
		List<String> completions = new ArrayList<>();
		for (MucOptions.User user : conversation.getMucOptions().getUsers()) {
			String name = user.getName();
			if (name != null && name.startsWith(incomplete)) {
				completions.add(name + (firstWord ? ": " : " "));
			}
		}
		Collections.sort(completions);
		if (completions.size() > completionIndex) {
			String completion = completions.get(completionIndex).substring(incomplete.length());
			this.binding.textinput.getEditableText().delete(lastCompletionCursor, lastCompletionCursor + lastCompletionLength);
			this.binding.textinput.getEditableText().insert(lastCompletionCursor, completion);
			lastCompletionLength = completion.length();
		} else {
			completionIndex = -1;
			this.binding.textinput.getEditableText().delete(lastCompletionCursor, lastCompletionCursor + lastCompletionLength);
			lastCompletionLength = 0;
		}
		return true;
	}

	private void startPendingIntent(PendingIntent pendingIntent, int requestCode) {
		try {
			getActivity().startIntentSenderForResult(pendingIntent.getIntentSender(), requestCode, null, 0, 0, 0);
		} catch (final SendIntentException ignored) {
		}
	}

	@Override
	public void onBackendConnected() {
		Log.d(Config.LOGTAG, "ConversationFragment.onBackendConnected()");
		String uuid = pendingConversationsUuid.pop();
		if (uuid != null) {
			Conversation conversation = activity.xmppConnectionService.findConversationByUuid(uuid);
			if (conversation == null) {
				Log.d(Config.LOGTAG, "unable to restore activity");
				clearPending();
				return;
			}
			reInit(conversation);
		}
		ActivityResult activityResult = postponedActivityResult.pop();
		if (activityResult != null) {
			handleActivityResult(activityResult);
		}
	}

	public void clearPending() {
		if (postponedActivityResult.pop() != null) {
			Log.d(Config.LOGTAG, "cleared pending intent with unhandled result left");
		}
	}

	public static Conversation getConversation(Activity activity) {
		Fragment fragment = activity.getFragmentManager().findFragmentById(R.id.secondary_fragment);
		if (fragment != null && fragment instanceof ConversationFragment) {
			return ((ConversationFragment) fragment).getConversation();
		} else {
			return null;
		}
	}

	public Conversation getConversation() {
		return conversation;
	}
}