1package eu.siacs.conversations.ui.adapter;
   2
   3import android.content.ActivityNotFoundException;
   4import android.content.Intent;
   5import android.content.SharedPreferences;
   6import android.content.pm.PackageManager;
   7import android.content.pm.ResolveInfo;
   8import android.content.res.Resources;
   9import android.graphics.Bitmap;
  10import android.graphics.Color;
  11import android.graphics.Typeface;
  12import android.graphics.drawable.BitmapDrawable;
  13import android.graphics.drawable.Drawable;
  14import android.net.Uri;
  15import android.os.AsyncTask;
  16import android.preference.PreferenceManager;
  17import android.support.annotation.ColorInt;
  18import android.support.v4.content.ContextCompat;
  19import android.text.Spannable;
  20import android.text.SpannableString;
  21import android.text.SpannableStringBuilder;
  22import android.text.Spanned;
  23import android.text.format.DateUtils;
  24import android.text.style.ForegroundColorSpan;
  25import android.text.style.RelativeSizeSpan;
  26import android.text.style.StyleSpan;
  27import android.text.util.Linkify;
  28import android.util.DisplayMetrics;
  29import android.util.Log;
  30import android.view.ActionMode;
  31import android.view.Menu;
  32import android.view.MenuItem;
  33import android.view.View;
  34import android.view.View.OnClickListener;
  35import android.view.View.OnLongClickListener;
  36import android.view.ViewGroup;
  37import android.view.WindowManager;
  38import android.widget.ArrayAdapter;
  39import android.widget.Button;
  40import android.widget.ImageView;
  41import android.widget.LinearLayout;
  42import android.widget.RelativeLayout;
  43import android.widget.TextView;
  44import android.widget.Toast;
  45
  46import java.lang.ref.WeakReference;
  47import java.net.URL;
  48import java.util.List;
  49import java.util.Locale;
  50import java.util.concurrent.RejectedExecutionException;
  51import java.util.regex.Matcher;
  52import java.util.regex.Pattern;
  53
  54import eu.siacs.conversations.Config;
  55import eu.siacs.conversations.R;
  56import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
  57import eu.siacs.conversations.entities.Account;
  58import eu.siacs.conversations.entities.Conversation;
  59import eu.siacs.conversations.entities.DownloadableFile;
  60import eu.siacs.conversations.entities.Message;
  61import eu.siacs.conversations.entities.Message.FileParams;
  62import eu.siacs.conversations.entities.Transferable;
  63import eu.siacs.conversations.persistance.FileBackend;
  64import eu.siacs.conversations.services.MessageArchiveService;
  65import eu.siacs.conversations.services.NotificationService;
  66import eu.siacs.conversations.ui.ConversationFragment;
  67import eu.siacs.conversations.ui.XmppActivity;
  68import eu.siacs.conversations.ui.service.AudioPlayer;
  69import eu.siacs.conversations.ui.text.DividerSpan;
  70import eu.siacs.conversations.ui.text.FixedURLSpan;
  71import eu.siacs.conversations.ui.text.QuoteSpan;
  72import eu.siacs.conversations.ui.widget.ClickableMovementMethod;
  73import eu.siacs.conversations.ui.widget.CopyTextView;
  74import eu.siacs.conversations.ui.widget.ListSelectionManager;
  75import eu.siacs.conversations.utils.CryptoHelper;
  76import eu.siacs.conversations.utils.EmojiWrapper;
  77import eu.siacs.conversations.utils.Emoticons;
  78import eu.siacs.conversations.utils.GeoHelper;
  79import eu.siacs.conversations.utils.Patterns;
  80import eu.siacs.conversations.utils.StylingHelper;
  81import eu.siacs.conversations.utils.UIHelper;
  82import eu.siacs.conversations.utils.XmppUri;
  83import eu.siacs.conversations.xmpp.mam.MamReference;
  84
  85public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextView.CopyHandler {
  86
  87	public static final String DATE_SEPARATOR_BODY = "DATE_SEPARATOR";
  88	private static final int SENT = 0;
  89	private static final int RECEIVED = 1;
  90	private static final int STATUS = 2;
  91	private static final int DATE_SEPARATOR = 3;
  92	private static final Pattern XMPP_PATTERN = Pattern
  93			.compile("xmpp\\:(?:(?:["
  94					+ Patterns.GOOD_IRI_CHAR
  95					+ "\\;\\/\\?\\@\\&\\=\\#\\~\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])"
  96					+ "|(?:\\%[a-fA-F0-9]{2}))+");
  97
  98	private static final Linkify.TransformFilter WEBURL_TRANSFORM_FILTER = new Linkify.TransformFilter() {
  99		@Override
 100		public String transformUrl(Matcher matcher, String url) {
 101			if (url == null) {
 102				return null;
 103			}
 104			final String lcUrl = url.toLowerCase(Locale.US);
 105			if (lcUrl.startsWith("http://") || lcUrl.startsWith("https://")) {
 106				return url;
 107			} else {
 108				return "http://" + url;
 109			}
 110		}
 111	};
 112	private static final Linkify.MatchFilter WEBURL_MATCH_FILTER = new Linkify.MatchFilter() {
 113		@Override
 114		public boolean acceptMatch(CharSequence cs, int start, int end) {
 115			return start < 1 || (cs.charAt(start - 1) != '@' && cs.charAt(start - 1) != '.' && !cs.subSequence(Math.max(0, start - 3), start).equals("://"));
 116		}
 117	};
 118
 119	private static final Linkify.MatchFilter XMPPURI_MATCH_FILTER = new Linkify.MatchFilter() {
 120		@Override
 121		public boolean acceptMatch(CharSequence s, int start, int end) {
 122			XmppUri uri = new XmppUri(s.subSequence(start, end).toString());
 123			return uri.isJidValid();
 124		}
 125	};
 126
 127	private final XmppActivity activity;
 128	private final ListSelectionManager listSelectionManager = new ListSelectionManager();
 129	private final AudioPlayer audioPlayer;
 130	private DisplayMetrics metrics;
 131	private OnContactPictureClicked mOnContactPictureClickedListener;
 132	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;
 133	private boolean mIndicateReceived = false;
 134	private boolean mUseGreenBackground = false;
 135	private OnQuoteListener onQuoteListener;
 136
 137	public MessageAdapter(XmppActivity activity, List<Message> messages) {
 138		super(activity, 0, messages);
 139		this.audioPlayer = new AudioPlayer(this);
 140		this.activity = activity;
 141		metrics = getContext().getResources().getDisplayMetrics();
 142		updatePreferences();
 143	}
 144
 145	public static boolean cancelPotentialWork(Message message, ImageView imageView) {
 146		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
 147
 148		if (bitmapWorkerTask != null) {
 149			final Message oldMessage = bitmapWorkerTask.message;
 150			if (oldMessage == null || message != oldMessage) {
 151				bitmapWorkerTask.cancel(true);
 152			} else {
 153				return false;
 154			}
 155		}
 156		return true;
 157	}
 158
 159	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
 160		if (imageView != null) {
 161			final Drawable drawable = imageView.getDrawable();
 162			if (drawable instanceof AsyncDrawable) {
 163				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
 164				return asyncDrawable.getBitmapWorkerTask();
 165			}
 166		}
 167		return null;
 168	}
 169
 170	public void flagScreenOn() {
 171		activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
 172	}
 173
 174	public void flagScreenOff() {
 175		activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
 176	}
 177
 178	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
 179		this.mOnContactPictureClickedListener = listener;
 180	}
 181
 182	public void setOnContactPictureLongClicked(
 183			OnContactPictureLongClicked listener) {
 184		this.mOnContactPictureLongClickedListener = listener;
 185	}
 186
 187	public void setOnQuoteListener(OnQuoteListener listener) {
 188		this.onQuoteListener = listener;
 189	}
 190
 191	@Override
 192	public int getViewTypeCount() {
 193		return 4;
 194	}
 195
 196	public int getItemViewType(Message message) {
 197		if (message.getType() == Message.TYPE_STATUS) {
 198			if (DATE_SEPARATOR_BODY.equals(message.getBody())) {
 199				return DATE_SEPARATOR;
 200			} else {
 201				return STATUS;
 202			}
 203		} else if (message.getStatus() <= Message.STATUS_RECEIVED) {
 204			return RECEIVED;
 205		}
 206
 207		return SENT;
 208	}
 209
 210	@Override
 211	public int getItemViewType(int position) {
 212		return this.getItemViewType(getItem(position));
 213	}
 214
 215	public int getMessageTextColor(boolean onDark, boolean primary) {
 216		if (onDark) {
 217			return ContextCompat.getColor(activity, primary ? R.color.white : R.color.white70);
 218		} else {
 219			return ContextCompat.getColor(activity, primary ? R.color.black87 : R.color.black54);
 220		}
 221	}
 222
 223	private void displayStatus(ViewHolder viewHolder, Message message, int type, boolean darkBackground) {
 224		String filesize = null;
 225		String info = null;
 226		boolean error = false;
 227		if (viewHolder.indicatorReceived != null) {
 228			viewHolder.indicatorReceived.setVisibility(View.GONE);
 229		}
 230
 231		if (viewHolder.edit_indicator != null) {
 232			if (message.edited()) {
 233				viewHolder.edit_indicator.setVisibility(View.VISIBLE);
 234				viewHolder.edit_indicator.setImageResource(darkBackground ? R.drawable.ic_mode_edit_white_18dp : R.drawable.ic_mode_edit_black_18dp);
 235				viewHolder.edit_indicator.setAlpha(darkBackground ? 0.7f : 0.57f);
 236			} else {
 237				viewHolder.edit_indicator.setVisibility(View.GONE);
 238			}
 239		}
 240		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 241				&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
 242		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getTransferable() != null) {
 243			FileParams params = message.getFileParams();
 244			if (params.size > (1.5 * 1024 * 1024)) {
 245				filesize = Math.round(params.size * 1f / (1024 * 1024)) + " MiB";
 246			} else if (params.size >= 1024) {
 247				filesize = Math.round(params.size * 1f / 1024) + " KiB";
 248			} else if (params.size > 0) {
 249				filesize = params.size + " B";
 250			}
 251			if (message.getTransferable() != null && message.getTransferable().getStatus() == Transferable.STATUS_FAILED) {
 252				error = true;
 253			}
 254		}
 255		switch (message.getMergedStatus()) {
 256			case Message.STATUS_WAITING:
 257				info = getContext().getString(R.string.waiting);
 258				break;
 259			case Message.STATUS_UNSEND:
 260				Transferable d = message.getTransferable();
 261				if (d != null) {
 262					info = getContext().getString(R.string.sending_file, d.getProgress());
 263				} else {
 264					info = getContext().getString(R.string.sending);
 265				}
 266				break;
 267			case Message.STATUS_OFFERED:
 268				info = getContext().getString(R.string.offering);
 269				break;
 270			case Message.STATUS_SEND_RECEIVED:
 271				if (mIndicateReceived) {
 272					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 273				}
 274				break;
 275			case Message.STATUS_SEND_DISPLAYED:
 276				if (mIndicateReceived) {
 277					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 278				}
 279				break;
 280			case Message.STATUS_SEND_FAILED:
 281				info = getContext().getString(R.string.send_failed);
 282				error = true;
 283				break;
 284			default:
 285				if (multiReceived) {
 286					info = UIHelper.getMessageDisplayName(message);
 287				}
 288				break;
 289		}
 290		if (error && type == SENT) {
 291			viewHolder.time.setTextColor(activity.getWarningTextColor());
 292		} else {
 293			viewHolder.time.setTextColor(this.getMessageTextColor(darkBackground, false));
 294		}
 295		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 296			viewHolder.indicator.setVisibility(View.GONE);
 297		} else {
 298			boolean verified = false;
 299			if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
 300				final FingerprintStatus status = message.getConversation()
 301						.getAccount().getAxolotlService().getFingerprintTrust(
 302								message.getFingerprint());
 303				if (status != null && status.isVerified()) {
 304					verified = true;
 305				}
 306			}
 307			if (verified) {
 308				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_verified_user_white_18dp : R.drawable.ic_verified_user_black_18dp);
 309			} else {
 310				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
 311			}
 312			if (darkBackground) {
 313				viewHolder.indicator.setAlpha(0.7f);
 314			} else {
 315				viewHolder.indicator.setAlpha(0.57f);
 316			}
 317			viewHolder.indicator.setVisibility(View.VISIBLE);
 318		}
 319
 320		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(), message.getMergedTimeSent());
 321		if (message.getStatus() <= Message.STATUS_RECEIVED) {
 322			if ((filesize != null) && (info != null)) {
 323				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize + " \u00B7 " + info);
 324			} else if ((filesize == null) && (info != null)) {
 325				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
 326			} else if ((filesize != null) && (info == null)) {
 327				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize);
 328			} else {
 329				viewHolder.time.setText(formatedTime);
 330			}
 331		} else {
 332			if ((filesize != null) && (info != null)) {
 333				viewHolder.time.setText(filesize + " \u00B7 " + info);
 334			} else if ((filesize == null) && (info != null)) {
 335				if (error) {
 336					viewHolder.time.setText(info + " \u00B7 " + formatedTime);
 337				} else {
 338					viewHolder.time.setText(info);
 339				}
 340			} else if ((filesize != null) && (info == null)) {
 341				viewHolder.time.setText(filesize + " \u00B7 " + formatedTime);
 342			} else {
 343				viewHolder.time.setText(formatedTime);
 344			}
 345		}
 346	}
 347
 348	private void displayInfoMessage(ViewHolder viewHolder, String text, boolean darkBackground) {
 349		viewHolder.download_button.setVisibility(View.GONE);
 350		viewHolder.audioPlayer.setVisibility(View.GONE);
 351		viewHolder.image.setVisibility(View.GONE);
 352		viewHolder.messageBody.setVisibility(View.VISIBLE);
 353		viewHolder.messageBody.setText(text);
 354		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 355		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
 356		viewHolder.messageBody.setTextIsSelectable(false);
 357	}
 358
 359	private void displayDecryptionFailed(ViewHolder viewHolder, boolean darkBackground) {
 360		viewHolder.download_button.setVisibility(View.GONE);
 361		viewHolder.image.setVisibility(View.GONE);
 362		viewHolder.audioPlayer.setVisibility(View.GONE);
 363		viewHolder.messageBody.setVisibility(View.VISIBLE);
 364		viewHolder.messageBody.setText(getContext().getString(
 365				R.string.decryption_failed));
 366		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 367		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 368		viewHolder.messageBody.setTextIsSelectable(false);
 369	}
 370
 371	private void displayEmojiMessage(final ViewHolder viewHolder, final String body) {
 372		viewHolder.download_button.setVisibility(View.GONE);
 373		viewHolder.audioPlayer.setVisibility(View.GONE);
 374		viewHolder.image.setVisibility(View.GONE);
 375		viewHolder.messageBody.setVisibility(View.VISIBLE);
 376		Spannable span = new SpannableString(body);
 377		float size = Emoticons.isEmoji(body) ? 3.0f : 2.0f;
 378		span.setSpan(new RelativeSizeSpan(size), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 379		viewHolder.messageBody.setText(EmojiWrapper.transform(span));
 380	}
 381
 382	private int applyQuoteSpan(SpannableStringBuilder body, int start, int end, boolean darkBackground) {
 383		if (start > 1 && !"\n\n".equals(body.subSequence(start - 2, start).toString())) {
 384			body.insert(start++, "\n");
 385			body.setSpan(new DividerSpan(false), start - 2, start, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 386			end++;
 387		}
 388		if (end < body.length() - 1 && !"\n\n".equals(body.subSequence(end, end + 2).toString())) {
 389			body.insert(end, "\n");
 390			body.setSpan(new DividerSpan(false), end, end + 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 391		}
 392		int color = darkBackground ? this.getMessageTextColor(darkBackground, false)
 393				: ContextCompat.getColor(activity, R.color.bubble);
 394		DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
 395		body.setSpan(new QuoteSpan(color, metrics), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 396		return 0;
 397	}
 398
 399	/**
 400	 * Applies QuoteSpan to group of lines which starts with > or » characters.
 401	 * Appends likebreaks and applies DividerSpan to them to show a padding between quote and text.
 402	 */
 403	private boolean handleTextQuotes(SpannableStringBuilder body, boolean darkBackground) {
 404		boolean startsWithQuote = false;
 405		char previous = '\n';
 406		int lineStart = -1;
 407		int lineTextStart = -1;
 408		int quoteStart = -1;
 409		for (int i = 0; i <= body.length(); i++) {
 410			char current = body.length() > i ? body.charAt(i) : '\n';
 411			if (lineStart == -1) {
 412				if (previous == '\n') {
 413					if ((current == '>' && UIHelper.isPositionFollowedByQuoteableCharacter(body, i))
 414							|| current == '\u00bb' && !UIHelper.isPositionFollowedByQuote(body, i)) {
 415						// Line start with quote
 416						lineStart = i;
 417						if (quoteStart == -1) quoteStart = i;
 418						if (i == 0) startsWithQuote = true;
 419					} else if (quoteStart >= 0) {
 420						// Line start without quote, apply spans there
 421						applyQuoteSpan(body, quoteStart, i - 1, darkBackground);
 422						quoteStart = -1;
 423					}
 424				}
 425			} else {
 426				// Remove extra spaces between > and first character in the line
 427				// > character will be removed too
 428				if (current != ' ' && lineTextStart == -1) {
 429					lineTextStart = i;
 430				}
 431				if (current == '\n') {
 432					body.delete(lineStart, lineTextStart);
 433					i -= lineTextStart - lineStart;
 434					if (i == lineStart) {
 435						// Avoid empty lines because span over empty line can be hidden
 436						body.insert(i++, " ");
 437					}
 438					lineStart = -1;
 439					lineTextStart = -1;
 440				}
 441			}
 442			previous = current;
 443		}
 444		if (quoteStart >= 0) {
 445			// Apply spans to finishing open quote
 446			applyQuoteSpan(body, quoteStart, body.length(), darkBackground);
 447		}
 448		return startsWithQuote;
 449	}
 450
 451	private void displayTextMessage(final ViewHolder viewHolder, final Message message, boolean darkBackground, int type) {
 452		viewHolder.download_button.setVisibility(View.GONE);
 453		viewHolder.image.setVisibility(View.GONE);
 454		viewHolder.audioPlayer.setVisibility(View.GONE);
 455		viewHolder.messageBody.setVisibility(View.VISIBLE);
 456
 457		viewHolder.messageBody.setTextColor(this.getMessageTextColor(darkBackground, true));
 458		viewHolder.messageBody.setLinkTextColor(this.getMessageTextColor(darkBackground, true));
 459		viewHolder.messageBody.setHighlightColor(ContextCompat.getColor(activity, darkBackground
 460				? (type == SENT || !mUseGreenBackground ? R.color.black26 : R.color.grey800) : R.color.grey500));
 461		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 462
 463		if (message.getBody() != null) {
 464			final String nick = UIHelper.getMessageDisplayName(message);
 465			SpannableStringBuilder body = message.getMergedBody();
 466			boolean hasMeCommand = message.hasMeCommand();
 467			if (hasMeCommand) {
 468				body = body.replace(0, Message.ME_COMMAND.length(), nick + " ");
 469			}
 470			if (body.length() > Config.MAX_DISPLAY_MESSAGE_CHARS) {
 471				body = new SpannableStringBuilder(body, 0, Config.MAX_DISPLAY_MESSAGE_CHARS);
 472				body.append("\u2026");
 473			}
 474			Message.MergeSeparator[] mergeSeparators = body.getSpans(0, body.length(), Message.MergeSeparator.class);
 475			for (Message.MergeSeparator mergeSeparator : mergeSeparators) {
 476				int start = body.getSpanStart(mergeSeparator);
 477				int end = body.getSpanEnd(mergeSeparator);
 478				body.setSpan(new DividerSpan(true), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 479			}
 480			boolean startsWithQuote = handleTextQuotes(body, darkBackground);
 481			if (message.getType() != Message.TYPE_PRIVATE) {
 482				if (hasMeCommand) {
 483					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 0, nick.length(),
 484							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 485				}
 486			} else {
 487				String privateMarker;
 488				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 489					privateMarker = activity.getString(R.string.private_message);
 490				} else {
 491					final String to;
 492					if (message.getCounterpart() != null) {
 493						to = message.getCounterpart().getResourcepart();
 494					} else {
 495						to = "";
 496					}
 497					privateMarker = activity.getString(R.string.private_message_to, to);
 498				}
 499				body.insert(0, privateMarker);
 500				int privateMarkerIndex = privateMarker.length();
 501				if (startsWithQuote) {
 502					body.insert(privateMarkerIndex, "\n\n");
 503					body.setSpan(new DividerSpan(false), privateMarkerIndex, privateMarkerIndex + 2,
 504							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 505				} else {
 506					body.insert(privateMarkerIndex, " ");
 507				}
 508				body.setSpan(new ForegroundColorSpan(getMessageTextColor(darkBackground, false)), 0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 509				body.setSpan(new StyleSpan(Typeface.BOLD), 0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 510				if (hasMeCommand) {
 511					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), privateMarkerIndex + 1,
 512							privateMarkerIndex + 1 + nick.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 513				}
 514			}
 515			if (message.getConversation().getMode() == Conversation.MODE_MULTI && message.getStatus() == Message.STATUS_RECEIVED) {
 516				Pattern pattern = NotificationService.generateNickHighlightPattern(message.getConversation().getMucOptions().getActualNick());
 517				Matcher matcher = pattern.matcher(body);
 518				while (matcher.find()) {
 519					body.setSpan(new StyleSpan(Typeface.BOLD), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 520				}
 521			}
 522			Matcher matcher = Emoticons.generatePattern(body).matcher(body);
 523			while (matcher.find()) {
 524				if (matcher.start() < matcher.end()) {
 525					body.setSpan(new RelativeSizeSpan(1.2f), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 526				}
 527			}
 528
 529			StylingHelper.format(body, viewHolder.messageBody.getCurrentTextColor());
 530
 531			Linkify.addLinks(body, XMPP_PATTERN, "xmpp", XMPPURI_MATCH_FILTER, null);
 532			Linkify.addLinks(body, Patterns.AUTOLINK_WEB_URL, "http", WEBURL_MATCH_FILTER, WEBURL_TRANSFORM_FILTER);
 533			Linkify.addLinks(body, GeoHelper.GEO_URI, "geo");
 534			FixedURLSpan.fix(body);
 535			viewHolder.messageBody.setAutoLinkMask(0);
 536			viewHolder.messageBody.setText(EmojiWrapper.transform(body));
 537			viewHolder.messageBody.setTextIsSelectable(true);
 538			viewHolder.messageBody.setMovementMethod(ClickableMovementMethod.getInstance());
 539			listSelectionManager.onUpdate(viewHolder.messageBody, message);
 540		} else {
 541			viewHolder.messageBody.setText("");
 542			viewHolder.messageBody.setTextIsSelectable(false);
 543		}
 544	}
 545
 546	private void displayDownloadableMessage(ViewHolder viewHolder, final Message message, String text) {
 547		viewHolder.image.setVisibility(View.GONE);
 548		viewHolder.messageBody.setVisibility(View.GONE);
 549		viewHolder.audioPlayer.setVisibility(View.GONE);
 550		viewHolder.download_button.setVisibility(View.VISIBLE);
 551		viewHolder.download_button.setText(text);
 552		viewHolder.download_button.setOnClickListener(v -> ConversationFragment.downloadFile(activity, message));
 553	}
 554
 555	private void displayOpenableMessage(ViewHolder viewHolder, final Message message) {
 556		viewHolder.image.setVisibility(View.GONE);
 557		viewHolder.messageBody.setVisibility(View.GONE);
 558		viewHolder.audioPlayer.setVisibility(View.GONE);
 559		viewHolder.download_button.setVisibility(View.VISIBLE);
 560		viewHolder.download_button.setText(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity, message)));
 561		viewHolder.download_button.setOnClickListener(v -> openDownloadable(message));
 562	}
 563
 564	private void displayLocationMessage(ViewHolder viewHolder, final Message message) {
 565		viewHolder.image.setVisibility(View.GONE);
 566		viewHolder.messageBody.setVisibility(View.GONE);
 567		viewHolder.audioPlayer.setVisibility(View.GONE);
 568		viewHolder.download_button.setVisibility(View.VISIBLE);
 569		viewHolder.download_button.setText(R.string.show_location);
 570		viewHolder.download_button.setOnClickListener(v -> showLocation(message));
 571	}
 572
 573	private void displayAudioMessage(ViewHolder viewHolder, Message message, boolean darkBackground) {
 574		viewHolder.image.setVisibility(View.GONE);
 575		viewHolder.messageBody.setVisibility(View.GONE);
 576		viewHolder.download_button.setVisibility(View.GONE);
 577		final RelativeLayout audioPlayer = viewHolder.audioPlayer;
 578		audioPlayer.setVisibility(View.VISIBLE);
 579		AudioPlayer.ViewHolder.get(audioPlayer).setDarkBackground(darkBackground);
 580		this.audioPlayer.init(audioPlayer, message);
 581	}
 582
 583	private void displayImageMessage(ViewHolder viewHolder, final Message message) {
 584		viewHolder.download_button.setVisibility(View.GONE);
 585		viewHolder.messageBody.setVisibility(View.GONE);
 586		viewHolder.audioPlayer.setVisibility(View.GONE);
 587		viewHolder.image.setVisibility(View.VISIBLE);
 588		FileParams params = message.getFileParams();
 589		double target = metrics.density * 288;
 590		int scaledW;
 591		int scaledH;
 592		if (Math.max(params.height, params.width) * metrics.density <= target) {
 593			scaledW = (int) (params.width * metrics.density);
 594			scaledH = (int) (params.height * metrics.density);
 595		} else if (Math.max(params.height, params.width) <= target) {
 596			scaledW = params.width;
 597			scaledH = params.height;
 598		} else if (params.width <= params.height) {
 599			scaledW = (int) (params.width / ((double) params.height / target));
 600			scaledH = (int) target;
 601		} else {
 602			scaledW = (int) target;
 603			scaledH = (int) (params.height / ((double) params.width / target));
 604		}
 605		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(scaledW, scaledH);
 606		layoutParams.setMargins(0, (int) (metrics.density * 4), 0, (int) (metrics.density * 4));
 607		viewHolder.image.setLayoutParams(layoutParams);
 608		activity.loadBitmap(message, viewHolder.image);
 609		viewHolder.image.setOnClickListener(v -> openDownloadable(message));
 610	}
 611
 612	private void loadMoreMessages(Conversation conversation) {
 613		conversation.setLastClearHistory(0, null);
 614		activity.xmppConnectionService.updateConversation(conversation);
 615		conversation.setHasMessagesLeftOnServer(true);
 616		conversation.setFirstMamReference(null);
 617		long timestamp = conversation.getLastMessageTransmitted().getTimestamp();
 618		if (timestamp == 0) {
 619			timestamp = System.currentTimeMillis();
 620		}
 621		conversation.messagesLoaded.set(true);
 622		MessageArchiveService.Query query = activity.xmppConnectionService.getMessageArchiveService().query(conversation, new MamReference(0), timestamp, false);
 623		if (query != null) {
 624			Toast.makeText(activity, R.string.fetching_history_from_server, Toast.LENGTH_LONG).show();
 625		} else {
 626			Toast.makeText(activity, R.string.not_fetching_history_retention_period, Toast.LENGTH_SHORT).show();
 627		}
 628	}
 629
 630	@Override
 631	public View getView(int position, View view, ViewGroup parent) {
 632		final Message message = getItem(position);
 633		final boolean omemoEncryption = message.getEncryption() == Message.ENCRYPTION_AXOLOTL;
 634		final boolean isInValidSession = message.isValidInSession() && (!omemoEncryption || message.isTrusted());
 635		final Conversation conversation = message.getConversation();
 636		final Account account = conversation.getAccount();
 637		final int type = getItemViewType(position);
 638		ViewHolder viewHolder;
 639		if (view == null) {
 640			viewHolder = new ViewHolder();
 641			switch (type) {
 642				case DATE_SEPARATOR:
 643					view = activity.getLayoutInflater().inflate(R.layout.message_date_bubble, parent, false);
 644					viewHolder.status_message = view.findViewById(R.id.message_body);
 645					viewHolder.message_box = view.findViewById(R.id.message_box);
 646					break;
 647				case SENT:
 648					view = activity.getLayoutInflater().inflate(R.layout.message_sent, parent, false);
 649					viewHolder.message_box = view.findViewById(R.id.message_box);
 650					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 651					viewHolder.download_button = view.findViewById(R.id.download_button);
 652					viewHolder.indicator = view.findViewById(R.id.security_indicator);
 653					viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
 654					viewHolder.image = view.findViewById(R.id.message_image);
 655					viewHolder.messageBody = view.findViewById(R.id.message_body);
 656					viewHolder.time = view.findViewById(R.id.message_time);
 657					viewHolder.indicatorReceived = view.findViewById(R.id.indicator_received);
 658					viewHolder.audioPlayer = view.findViewById(R.id.audio_player);
 659					break;
 660				case RECEIVED:
 661					view = activity.getLayoutInflater().inflate(R.layout.message_received, parent, false);
 662					viewHolder.message_box = view.findViewById(R.id.message_box);
 663					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 664					viewHolder.download_button = view.findViewById(R.id.download_button);
 665					viewHolder.indicator = view.findViewById(R.id.security_indicator);
 666					viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
 667					viewHolder.image = view.findViewById(R.id.message_image);
 668					viewHolder.messageBody = view.findViewById(R.id.message_body);
 669					viewHolder.time = view.findViewById(R.id.message_time);
 670					viewHolder.indicatorReceived = view.findViewById(R.id.indicator_received);
 671					viewHolder.encryption = view.findViewById(R.id.message_encryption);
 672					viewHolder.audioPlayer = view.findViewById(R.id.audio_player);
 673					break;
 674				case STATUS:
 675					view = activity.getLayoutInflater().inflate(R.layout.message_status, parent, false);
 676					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 677					viewHolder.status_message = view.findViewById(R.id.status_message);
 678					viewHolder.load_more_messages = view.findViewById(R.id.load_more_messages);
 679					break;
 680				default:
 681					throw new AssertionError("Unknown view type");
 682			}
 683			if (viewHolder.messageBody != null) {
 684				listSelectionManager.onCreate(viewHolder.messageBody,
 685						new MessageBodyActionModeCallback(viewHolder.messageBody));
 686				viewHolder.messageBody.setCopyHandler(this);
 687			}
 688			view.setTag(viewHolder);
 689		} else {
 690			viewHolder = (ViewHolder) view.getTag();
 691			if (viewHolder == null) {
 692				return view;
 693			}
 694		}
 695
 696		boolean darkBackground = type == RECEIVED && (!isInValidSession || mUseGreenBackground) || activity.isDarkTheme();
 697
 698		if (type == DATE_SEPARATOR) {
 699			if (UIHelper.today(message.getTimeSent())) {
 700				viewHolder.status_message.setText(R.string.today);
 701			} else if (UIHelper.yesterday(message.getTimeSent())) {
 702				viewHolder.status_message.setText(R.string.yesterday);
 703			} else {
 704				viewHolder.status_message.setText(DateUtils.formatDateTime(activity, message.getTimeSent(), DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR));
 705			}
 706			viewHolder.message_box.setBackgroundResource(activity.isDarkTheme() ? R.drawable.date_bubble_grey : R.drawable.date_bubble_white);
 707			viewHolder.status_message.setTextColor(activity.getSecondaryTextColor());
 708			return view;
 709		} else if (type == STATUS) {
 710			if ("LOAD_MORE".equals(message.getBody())) {
 711				viewHolder.status_message.setVisibility(View.GONE);
 712				viewHolder.contact_picture.setVisibility(View.GONE);
 713				viewHolder.load_more_messages.setVisibility(View.VISIBLE);
 714				viewHolder.load_more_messages.setOnClickListener(v -> loadMoreMessages(message.getConversation()));
 715			} else {
 716				viewHolder.status_message.setVisibility(View.VISIBLE);
 717				viewHolder.load_more_messages.setVisibility(View.GONE);
 718				viewHolder.status_message.setText(message.getBody());
 719				boolean showAvatar;
 720				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 721					showAvatar = true;
 722					loadAvatar(message, viewHolder.contact_picture, activity.getPixel(32));
 723				} else if (message.getCounterpart() != null || message.getTrueCounterpart() != null || (message.getCounterparts() != null && message.getCounterparts().size() > 0)) {
 724					showAvatar = true;
 725					loadAvatar(message, viewHolder.contact_picture, activity.getPixel(32));
 726				} else {
 727					showAvatar = false;
 728				}
 729				if (showAvatar) {
 730					viewHolder.contact_picture.setAlpha(0.5f);
 731					viewHolder.contact_picture.setVisibility(View.VISIBLE);
 732				} else {
 733					viewHolder.contact_picture.setVisibility(View.GONE);
 734				}
 735			}
 736			return view;
 737		} else {
 738			loadAvatar(message, viewHolder.contact_picture, activity.getPixel(48));
 739		}
 740
 741		viewHolder.contact_picture.setOnClickListener(v -> {
 742			if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
 743				MessageAdapter.this.mOnContactPictureClickedListener
 744						.onContactPictureClicked(message);
 745			}
 746
 747		});
 748		viewHolder.contact_picture.setOnLongClickListener(v -> {
 749			if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
 750				MessageAdapter.this.mOnContactPictureLongClickedListener
 751						.onContactPictureLongClicked(message);
 752				return true;
 753			} else {
 754				return false;
 755			}
 756		});
 757
 758		final Transferable transferable = message.getTransferable();
 759		if (transferable != null && transferable.getStatus() != Transferable.STATUS_UPLOADING) {
 760			if (transferable.getStatus() == Transferable.STATUS_OFFER) {
 761				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, message)));
 762			} else if (transferable.getStatus() == Transferable.STATUS_OFFER_CHECK_FILESIZE) {
 763				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 764			} else {
 765				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first, darkBackground);
 766			}
 767		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 768			displayImageMessage(viewHolder, message);
 769		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 770			if (message.getFileParams().width > 0 && message.getFileParams().height > 0) {
 771				displayImageMessage(viewHolder, message);
 772			} else if (message.getFileParams().runtime > 0) {
 773				displayAudioMessage(viewHolder, message, darkBackground);
 774			} else {
 775				displayOpenableMessage(viewHolder, message);
 776			}
 777		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 778			if (account.isPgpDecryptionServiceConnected()) {
 779				if (!account.hasPendingPgpIntent(conversation)) {
 780					displayInfoMessage(viewHolder, activity.getString(R.string.message_decrypting), darkBackground);
 781				} else {
 782					displayInfoMessage(viewHolder, activity.getString(R.string.pgp_message), darkBackground);
 783				}
 784			} else {
 785				displayInfoMessage(viewHolder, activity.getString(R.string.install_openkeychain), darkBackground);
 786				viewHolder.message_box.setOnClickListener(new OnClickListener() {
 787
 788					@Override
 789					public void onClick(View v) {
 790						activity.showInstallPgpDialog();
 791					}
 792				});
 793			}
 794		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
 795			displayDecryptionFailed(viewHolder, darkBackground);
 796		} else {
 797			if (message.isGeoUri()) {
 798				displayLocationMessage(viewHolder, message);
 799			} else if (message.bodyIsOnlyEmojis() && message.getType() != Message.TYPE_PRIVATE) {
 800				displayEmojiMessage(viewHolder, message.getBody().trim());
 801			} else if (message.treatAsDownloadable()) {
 802				try {
 803					URL url = new URL(message.getBody());
 804					displayDownloadableMessage(viewHolder,
 805							message,
 806							activity.getString(R.string.check_x_filesize_on_host,
 807									UIHelper.getFileDescriptionString(activity, message),
 808									url.getHost()));
 809				} catch (Exception e) {
 810					displayDownloadableMessage(viewHolder,
 811							message,
 812							activity.getString(R.string.check_x_filesize,
 813									UIHelper.getFileDescriptionString(activity, message)));
 814				}
 815			} else {
 816				displayTextMessage(viewHolder, message, darkBackground, type);
 817			}
 818		}
 819
 820		if (type == RECEIVED) {
 821			if (isInValidSession) {
 822				int bubble;
 823				if (!mUseGreenBackground) {
 824					bubble = activity.getThemeResource(R.attr.message_bubble_received_monochrome, R.drawable.message_bubble_received_white);
 825				} else {
 826					bubble = activity.getThemeResource(R.attr.message_bubble_received_green, R.drawable.message_bubble_received);
 827				}
 828				viewHolder.message_box.setBackgroundResource(bubble);
 829				viewHolder.encryption.setVisibility(View.GONE);
 830			} else {
 831				viewHolder.message_box.setBackgroundResource(R.drawable.message_bubble_received_warning);
 832				viewHolder.encryption.setVisibility(View.VISIBLE);
 833				if (omemoEncryption && !message.isTrusted()) {
 834					viewHolder.encryption.setText(R.string.not_trusted);
 835				} else {
 836					viewHolder.encryption.setText(CryptoHelper.encryptionTypeToText(message.getEncryption()));
 837				}
 838			}
 839		}
 840
 841		displayStatus(viewHolder, message, type, darkBackground);
 842
 843		return view;
 844	}
 845
 846	@Override
 847	public void notifyDataSetChanged() {
 848		listSelectionManager.onBeforeNotifyDataSetChanged();
 849		super.notifyDataSetChanged();
 850		listSelectionManager.onAfterNotifyDataSetChanged();
 851	}
 852
 853	private String transformText(CharSequence text, int start, int end, boolean forCopy) {
 854		SpannableStringBuilder builder = new SpannableStringBuilder(text);
 855		Object copySpan = new Object();
 856		builder.setSpan(copySpan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 857		DividerSpan[] dividerSpans = builder.getSpans(0, builder.length(), DividerSpan.class);
 858		for (DividerSpan dividerSpan : dividerSpans) {
 859			builder.replace(builder.getSpanStart(dividerSpan), builder.getSpanEnd(dividerSpan),
 860					dividerSpan.isLarge() ? "\n\n" : "\n");
 861		}
 862		start = builder.getSpanStart(copySpan);
 863		end = builder.getSpanEnd(copySpan);
 864		if (start == -1 || end == -1) return "";
 865		builder = new SpannableStringBuilder(builder, start, end);
 866		if (forCopy) {
 867			QuoteSpan[] quoteSpans = builder.getSpans(0, builder.length(), QuoteSpan.class);
 868			for (QuoteSpan quoteSpan : quoteSpans) {
 869				builder.insert(builder.getSpanStart(quoteSpan), "> ");
 870			}
 871		}
 872		return builder.toString();
 873	}
 874
 875	@Override
 876	public String transformTextForCopy(CharSequence text, int start, int end) {
 877		if (text instanceof Spanned) {
 878			return transformText(text, start, end, true);
 879		} else {
 880			return text.toString().substring(start, end);
 881		}
 882	}
 883
 884	public FileBackend getFileBackend() {
 885		return activity.xmppConnectionService.getFileBackend();
 886	}
 887
 888	public void stopAudioPlayer() {
 889		audioPlayer.stop();
 890	}
 891
 892	public void openDownloadable(Message message) {
 893		DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 894		if (!file.exists()) {
 895			Toast.makeText(activity, R.string.file_deleted, Toast.LENGTH_SHORT).show();
 896			return;
 897		}
 898		Intent openIntent = new Intent(Intent.ACTION_VIEW);
 899		String mime = file.getMimeType();
 900		if (mime == null) {
 901			mime = "*/*";
 902		}
 903		Uri uri;
 904		try {
 905			uri = FileBackend.getUriForFile(activity, file);
 906		} catch (SecurityException e) {
 907			Log.d(Config.LOGTAG, "No permission to access " + file.getAbsolutePath(), e);
 908			Toast.makeText(activity, activity.getString(R.string.no_permission_to_access_x, file.getAbsolutePath()), Toast.LENGTH_SHORT).show();
 909			return;
 910		}
 911		openIntent.setDataAndType(uri, mime);
 912		openIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 913		PackageManager manager = activity.getPackageManager();
 914		List<ResolveInfo> info = manager.queryIntentActivities(openIntent, 0);
 915		if (info.size() == 0) {
 916			openIntent.setDataAndType(uri, "*/*");
 917		}
 918		try {
 919			getContext().startActivity(openIntent);
 920		} catch (ActivityNotFoundException e) {
 921			Toast.makeText(activity, R.string.no_application_found_to_open_file, Toast.LENGTH_SHORT).show();
 922		}
 923	}
 924
 925	public void showLocation(Message message) {
 926		for (Intent intent : GeoHelper.createGeoIntentsFromMessage(message)) {
 927			if (intent.resolveActivity(getContext().getPackageManager()) != null) {
 928				getContext().startActivity(intent);
 929				return;
 930			}
 931		}
 932		Toast.makeText(activity, R.string.no_application_found_to_display_location, Toast.LENGTH_SHORT).show();
 933	}
 934
 935	public void updatePreferences() {
 936		SharedPreferences p = PreferenceManager.getDefaultSharedPreferences(activity);
 937		this.mIndicateReceived = p.getBoolean("indicate_received", activity.getResources().getBoolean(R.bool.indicate_received));
 938		this.mUseGreenBackground = p.getBoolean("use_green_background", activity.getResources().getBoolean(R.bool.use_green_background));
 939	}
 940
 941	public void loadAvatar(Message message, ImageView imageView, int size) {
 942		if (cancelPotentialWork(message, imageView)) {
 943			final Bitmap bm = activity.avatarService().get(message, size, true);
 944			if (bm != null) {
 945				cancelPotentialWork(message, imageView);
 946				imageView.setImageBitmap(bm);
 947				imageView.setBackgroundColor(Color.TRANSPARENT);
 948			} else {
 949				@ColorInt int bg;
 950				if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
 951					bg = Color.TRANSPARENT;
 952				} else {
 953					bg = UIHelper.getColorForName(UIHelper.getMessageDisplayName(message));
 954				}
 955				imageView.setBackgroundColor(bg);
 956				imageView.setImageDrawable(null);
 957				final BitmapWorkerTask task = new BitmapWorkerTask(imageView, size);
 958				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
 959				imageView.setImageDrawable(asyncDrawable);
 960				try {
 961					task.execute(message);
 962				} catch (final RejectedExecutionException ignored) {
 963				}
 964			}
 965		}
 966	}
 967
 968	public interface OnQuoteListener {
 969		void onQuote(String text);
 970	}
 971
 972	public interface OnContactPictureClicked {
 973		void onContactPictureClicked(Message message);
 974	}
 975
 976	public interface OnContactPictureLongClicked {
 977		void onContactPictureLongClicked(Message message);
 978	}
 979
 980	private static class ViewHolder {
 981
 982		public Button load_more_messages;
 983		public ImageView edit_indicator;
 984		public RelativeLayout audioPlayer;
 985		protected LinearLayout message_box;
 986		protected Button download_button;
 987		protected ImageView image;
 988		protected ImageView indicator;
 989		protected ImageView indicatorReceived;
 990		protected TextView time;
 991		protected CopyTextView messageBody;
 992		protected ImageView contact_picture;
 993		protected TextView status_message;
 994		protected TextView encryption;
 995	}
 996
 997	static class AsyncDrawable extends BitmapDrawable {
 998		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
 999
1000		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
1001			super(res, bitmap);
1002			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
1003		}
1004
1005		public BitmapWorkerTask getBitmapWorkerTask() {
1006			return bitmapWorkerTaskReference.get();
1007		}
1008	}
1009
1010	private class MessageBodyActionModeCallback implements ActionMode.Callback {
1011
1012		private final TextView textView;
1013
1014		public MessageBodyActionModeCallback(TextView textView) {
1015			this.textView = textView;
1016		}
1017
1018		@Override
1019		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
1020			if (onQuoteListener != null) {
1021				int quoteResId = activity.getThemeResource(R.attr.icon_quote, R.drawable.ic_action_reply);
1022				// 3rd item is placed after "copy" item
1023				menu.add(0, android.R.id.button1, 3, R.string.quote).setIcon(quoteResId)
1024						.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
1025			}
1026			return false;
1027		}
1028
1029		@Override
1030		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
1031			return false;
1032		}
1033
1034		@Override
1035		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
1036			if (item.getItemId() == android.R.id.button1) {
1037				int start = textView.getSelectionStart();
1038				int end = textView.getSelectionEnd();
1039				if (end > start) {
1040					String text = transformText(textView.getText(), start, end, false);
1041					if (onQuoteListener != null) {
1042						onQuoteListener.onQuote(text);
1043					}
1044					mode.finish();
1045				}
1046				return true;
1047			}
1048			return false;
1049		}
1050
1051		@Override
1052		public void onDestroyActionMode(ActionMode mode) {
1053		}
1054	}
1055
1056	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
1057		private final WeakReference<ImageView> imageViewReference;
1058		private final int size;
1059		private Message message = null;
1060
1061		public BitmapWorkerTask(ImageView imageView, int size) {
1062			imageViewReference = new WeakReference<>(imageView);
1063			this.size = size;
1064		}
1065
1066		@Override
1067		protected Bitmap doInBackground(Message... params) {
1068			this.message = params[0];
1069			return activity.avatarService().get(this.message, size, isCancelled());
1070		}
1071
1072		@Override
1073		protected void onPostExecute(Bitmap bitmap) {
1074			if (bitmap != null && !isCancelled()) {
1075				final ImageView imageView = imageViewReference.get();
1076				if (imageView != null) {
1077					imageView.setImageBitmap(bitmap);
1078					imageView.setBackgroundColor(0x00000000);
1079				}
1080			}
1081		}
1082	}
1083}