1package eu.siacs.conversations.ui.adapter;
   2
   3import android.content.ActivityNotFoundException;
   4import android.content.Intent;
   5import android.content.pm.PackageManager;
   6import android.content.pm.ResolveInfo;
   7import android.content.res.Resources;
   8import android.graphics.Bitmap;
   9import android.graphics.Color;
  10import android.graphics.Typeface;
  11import android.graphics.drawable.BitmapDrawable;
  12import android.graphics.drawable.Drawable;
  13import android.net.Uri;
  14import android.os.AsyncTask;
  15import android.support.annotation.ColorInt;
  16import android.support.text.emoji.EmojiCompat;
  17import android.support.v4.content.ContextCompat;
  18import android.text.Spannable;
  19import android.text.SpannableString;
  20import android.text.SpannableStringBuilder;
  21import android.text.Spanned;
  22import android.text.format.DateUtils;
  23import android.text.style.ForegroundColorSpan;
  24import android.text.style.RelativeSizeSpan;
  25import android.text.style.StyleSpan;
  26import android.text.util.Linkify;
  27import android.util.DisplayMetrics;
  28import android.util.Log;
  29import android.view.ActionMode;
  30import android.view.Menu;
  31import android.view.MenuItem;
  32import android.view.View;
  33import android.view.View.OnClickListener;
  34import android.view.View.OnLongClickListener;
  35import android.view.ViewGroup;
  36import android.widget.ArrayAdapter;
  37import android.widget.Button;
  38import android.widget.ImageView;
  39import android.widget.LinearLayout;
  40import android.widget.RelativeLayout;
  41import android.widget.TextView;
  42import android.widget.Toast;
  43
  44import java.lang.ref.WeakReference;
  45import java.net.URL;
  46import java.util.List;
  47import java.util.Locale;
  48import java.util.concurrent.RejectedExecutionException;
  49import java.util.regex.Matcher;
  50import java.util.regex.Pattern;
  51
  52import eu.siacs.conversations.Config;
  53import eu.siacs.conversations.R;
  54import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
  55import eu.siacs.conversations.entities.Account;
  56import eu.siacs.conversations.entities.Conversation;
  57import eu.siacs.conversations.entities.DownloadableFile;
  58import eu.siacs.conversations.entities.Message;
  59import eu.siacs.conversations.entities.Message.FileParams;
  60import eu.siacs.conversations.entities.Transferable;
  61import eu.siacs.conversations.persistance.FileBackend;
  62import eu.siacs.conversations.services.MessageArchiveService;
  63import eu.siacs.conversations.services.NotificationService;
  64import eu.siacs.conversations.ui.ConversationActivity;
  65import eu.siacs.conversations.ui.service.AudioPlayer;
  66import eu.siacs.conversations.ui.text.DividerSpan;
  67import eu.siacs.conversations.ui.text.FixedURLSpan;
  68import eu.siacs.conversations.ui.text.QuoteSpan;
  69import eu.siacs.conversations.ui.widget.ClickableMovementMethod;
  70import eu.siacs.conversations.ui.widget.CopyTextView;
  71import eu.siacs.conversations.ui.widget.ListSelectionManager;
  72import eu.siacs.conversations.utils.CryptoHelper;
  73import eu.siacs.conversations.utils.EmojiWrapper;
  74import eu.siacs.conversations.utils.Emoticons;
  75import eu.siacs.conversations.utils.GeoHelper;
  76import eu.siacs.conversations.utils.Patterns;
  77import eu.siacs.conversations.utils.StylingHelper;
  78import eu.siacs.conversations.utils.UIHelper;
  79import eu.siacs.conversations.xmpp.mam.MamReference;
  80
  81public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextView.CopyHandler {
  82
  83	private static final int SENT = 0;
  84	private static final int RECEIVED = 1;
  85	private static final int STATUS = 2;
  86	private static final int DATE_SEPARATOR = 3;
  87
  88	public static final String DATE_SEPARATOR_BODY = "DATE_SEPARATOR";
  89
  90	private static final Pattern XMPP_PATTERN = Pattern
  91			.compile("xmpp\\:(?:(?:["
  92					+ Patterns.GOOD_IRI_CHAR
  93					+ "\\;\\/\\?\\@\\&\\=\\#\\~\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])"
  94					+ "|(?:\\%[a-fA-F0-9]{2}))+");
  95
  96	private static final Linkify.TransformFilter WEBURL_TRANSFORM_FILTER = new Linkify.TransformFilter() {
  97		@Override
  98		public String transformUrl(Matcher matcher, String url) {
  99			if (url == null) {
 100				return null;
 101			}
 102			final String lcUrl = url.toLowerCase(Locale.US);
 103			if (lcUrl.startsWith("http://") || lcUrl.startsWith("https://")) {
 104				return url;
 105			} else {
 106				return "http://"+url;
 107			}
 108		}
 109	};
 110	private static final Linkify.MatchFilter WEBURL_MATCH_FILTER = new Linkify.MatchFilter() {
 111		@Override
 112		public boolean acceptMatch(CharSequence cs, int start, int end) {
 113			return start < 1 || (cs.charAt(start-1) != '@' && cs.charAt(start-1) != '.' && !cs.subSequence(Math.max(0,start - 3),start).equals("://"));
 114		}
 115	};
 116
 117	private final ConversationActivity activity;
 118
 119	private DisplayMetrics metrics;
 120
 121	private OnContactPictureClicked mOnContactPictureClickedListener;
 122	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;
 123
 124	private boolean mIndicateReceived = false;
 125	private boolean mUseGreenBackground = false;
 126
 127	private OnQuoteListener onQuoteListener;
 128
 129	private final ListSelectionManager listSelectionManager = new ListSelectionManager();
 130
 131	private final AudioPlayer audioPlayer;
 132
 133	public MessageAdapter(ConversationActivity activity, List<Message> messages) {
 134		super(activity, 0, messages);
 135		this.audioPlayer = new AudioPlayer(this);
 136		this.activity = activity;
 137		metrics = getContext().getResources().getDisplayMetrics();
 138		updatePreferences();
 139	}
 140
 141	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
 142		this.mOnContactPictureClickedListener = listener;
 143	}
 144
 145	public void setOnContactPictureLongClicked(
 146			OnContactPictureLongClicked listener) {
 147		this.mOnContactPictureLongClickedListener = listener;
 148			}
 149
 150	public void setOnQuoteListener(OnQuoteListener listener) {
 151		this.onQuoteListener = listener;
 152	}
 153
 154	@Override
 155	public int getViewTypeCount() {
 156		return 4;
 157	}
 158
 159	public int getItemViewType(Message message) {
 160		if (message.getType() == Message.TYPE_STATUS) {
 161			if (DATE_SEPARATOR_BODY.equals(message.getBody())) {
 162				return DATE_SEPARATOR;
 163			} else {
 164				return STATUS;
 165			}
 166		} else if (message.getStatus() <= Message.STATUS_RECEIVED) {
 167			return RECEIVED;
 168		}
 169
 170		return SENT;
 171	}
 172
 173	@Override
 174	public int getItemViewType(int position) {
 175		return this.getItemViewType(getItem(position));
 176	}
 177
 178	public int getMessageTextColor(boolean onDark, boolean primary) {
 179		if (onDark) {
 180			return ContextCompat.getColor(activity, primary ? R.color.white : R.color.white70);
 181		} else {
 182			return ContextCompat.getColor(activity, primary ? R.color.black87 : R.color.black54);
 183		}
 184	}
 185
 186	private void displayStatus(ViewHolder viewHolder, Message message, int type, boolean darkBackground) {
 187		String filesize = null;
 188		String info = null;
 189		boolean error = false;
 190		if (viewHolder.indicatorReceived != null) {
 191			viewHolder.indicatorReceived.setVisibility(View.GONE);
 192		}
 193
 194		if (viewHolder.edit_indicator != null) {
 195			if (message.edited()) {
 196				viewHolder.edit_indicator.setVisibility(View.VISIBLE);
 197				viewHolder.edit_indicator.setImageResource(darkBackground ? R.drawable.ic_mode_edit_white_18dp : R.drawable.ic_mode_edit_black_18dp);
 198				viewHolder.edit_indicator.setAlpha(darkBackground ? 0.7f : 0.57f);
 199			} else {
 200				viewHolder.edit_indicator.setVisibility(View.GONE);
 201			}
 202		}
 203		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 204			&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
 205		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getTransferable() != null) {
 206			FileParams params = message.getFileParams();
 207			if (params.size > (1.5 * 1024 * 1024)) {
 208				filesize = Math.round(params.size * 1f/ (1024 * 1024))+ " MiB";
 209			} else if (params.size >= 1024) {
 210				filesize = Math.round(params.size * 1f/ 1024) + " KiB";
 211			} else if (params.size > 0){
 212				filesize = params.size + " B";
 213			}
 214			if (message.getTransferable() != null && message.getTransferable().getStatus() == Transferable.STATUS_FAILED) {
 215				error = true;
 216			}
 217		}
 218		switch (message.getMergedStatus()) {
 219			case Message.STATUS_WAITING:
 220				info = getContext().getString(R.string.waiting);
 221				break;
 222			case Message.STATUS_UNSEND:
 223				Transferable d = message.getTransferable();
 224				if (d!=null) {
 225					info = getContext().getString(R.string.sending_file,d.getProgress());
 226				} else {
 227					info = getContext().getString(R.string.sending);
 228				}
 229				break;
 230			case Message.STATUS_OFFERED:
 231				info = getContext().getString(R.string.offering);
 232				break;
 233			case Message.STATUS_SEND_RECEIVED:
 234				if (mIndicateReceived) {
 235					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 236				}
 237				break;
 238			case Message.STATUS_SEND_DISPLAYED:
 239				if (mIndicateReceived) {
 240					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 241				}
 242				break;
 243			case Message.STATUS_SEND_FAILED:
 244				info = getContext().getString(R.string.send_failed);
 245				error = true;
 246				break;
 247			default:
 248				if (multiReceived) {
 249					info = UIHelper.getMessageDisplayName(message);
 250				}
 251				break;
 252		}
 253		if (error && type == SENT) {
 254			viewHolder.time.setTextColor(activity.getWarningTextColor());
 255		} else {
 256			viewHolder.time.setTextColor(this.getMessageTextColor(darkBackground,false));
 257		}
 258		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 259			viewHolder.indicator.setVisibility(View.GONE);
 260		} else {
 261			boolean verified = false;
 262			if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
 263				final FingerprintStatus status = message.getConversation()
 264						.getAccount().getAxolotlService().getFingerprintTrust(
 265								message.getFingerprint());
 266				if (status != null && status.isVerified()) {
 267					verified = true;
 268				}
 269			}
 270			if (verified) {
 271				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_verified_user_white_18dp : R.drawable.ic_verified_user_black_18dp);
 272			} else {
 273				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
 274			}
 275			if (darkBackground) {
 276				viewHolder.indicator.setAlpha(0.7f);
 277			} else {
 278				viewHolder.indicator.setAlpha(0.57f);
 279			}
 280			viewHolder.indicator.setVisibility(View.VISIBLE);
 281		}
 282
 283		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(), message.getMergedTimeSent());
 284		if (message.getStatus() <= Message.STATUS_RECEIVED) {
 285			if ((filesize != null) && (info != null)) {
 286				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize +" \u00B7 " + info);
 287			} else if ((filesize == null) && (info != null)) {
 288				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
 289			} else if ((filesize != null) && (info == null)) {
 290				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize);
 291			} else {
 292				viewHolder.time.setText(formatedTime);
 293			}
 294		} else {
 295			if ((filesize != null) && (info != null)) {
 296				viewHolder.time.setText(filesize + " \u00B7 " + info);
 297			} else if ((filesize == null) && (info != null)) {
 298				if (error) {
 299					viewHolder.time.setText(info + " \u00B7 " + formatedTime);
 300				} else {
 301					viewHolder.time.setText(info);
 302				}
 303			} else if ((filesize != null) && (info == null)) {
 304				viewHolder.time.setText(filesize + " \u00B7 " + formatedTime);
 305			} else {
 306				viewHolder.time.setText(formatedTime);
 307			}
 308		}
 309	}
 310
 311	private void displayInfoMessage(ViewHolder viewHolder, String text, boolean darkBackground) {
 312		viewHolder.download_button.setVisibility(View.GONE);
 313		viewHolder.audioPlayer.setVisibility(View.GONE);
 314		viewHolder.image.setVisibility(View.GONE);
 315		viewHolder.messageBody.setVisibility(View.VISIBLE);
 316		viewHolder.messageBody.setText(text);
 317		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 318		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
 319		viewHolder.messageBody.setTextIsSelectable(false);
 320	}
 321
 322	private void displayDecryptionFailed(ViewHolder viewHolder, boolean darkBackground) {
 323		viewHolder.download_button.setVisibility(View.GONE);
 324		viewHolder.image.setVisibility(View.GONE);
 325		viewHolder.audioPlayer.setVisibility(View.GONE);
 326		viewHolder.messageBody.setVisibility(View.VISIBLE);
 327		viewHolder.messageBody.setText(getContext().getString(
 328				R.string.decryption_failed));
 329		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 330		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 331		viewHolder.messageBody.setTextIsSelectable(false);
 332	}
 333
 334	private void displayEmojiMessage(final ViewHolder viewHolder, final String body) {
 335		viewHolder.download_button.setVisibility(View.GONE);
 336		viewHolder.audioPlayer.setVisibility(View.GONE);
 337		viewHolder.image.setVisibility(View.GONE);
 338		viewHolder.messageBody.setVisibility(View.VISIBLE);
 339		Spannable span = new SpannableString(body);
 340		float size = Emoticons.isEmoji(body) ? 3.0f : 2.0f;
 341		span.setSpan(new RelativeSizeSpan(size), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 342		viewHolder.messageBody.setText(EmojiWrapper.transform(span));
 343	}
 344
 345	private int applyQuoteSpan(SpannableStringBuilder body, int start, int end, boolean darkBackground) {
 346		if (start > 1 && !"\n\n".equals(body.subSequence(start - 2, start).toString())) {
 347			body.insert(start++, "\n");
 348			body.setSpan(new DividerSpan(false), start - 2, start, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 349			end++;
 350		}
 351		if (end < body.length() - 1 && !"\n\n".equals(body.subSequence(end, end + 2).toString())) {
 352			body.insert(end, "\n");
 353			body.setSpan(new DividerSpan(false), end, end + 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 354		}
 355		int color = darkBackground ? this.getMessageTextColor(darkBackground, false)
 356				: ContextCompat.getColor(activity, R.color.bubble);
 357		DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
 358		body.setSpan(new QuoteSpan(color, metrics), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 359		return 0;
 360	}
 361
 362	/**
 363	 * Applies QuoteSpan to group of lines which starts with > or » characters.
 364	 * Appends likebreaks and applies DividerSpan to them to show a padding between quote and text.
 365	 */
 366	private boolean handleTextQuotes(SpannableStringBuilder body, boolean darkBackground) {
 367		boolean startsWithQuote = false;
 368		char previous = '\n';
 369		int lineStart = -1;
 370		int lineTextStart = -1;
 371		int quoteStart = -1;
 372		for (int i = 0; i <= body.length(); i++) {
 373			char current = body.length() > i ? body.charAt(i) : '\n';
 374			if (lineStart == -1) {
 375				if (previous == '\n') {
 376					if ((current == '>' && UIHelper.isPositionFollowedByQuoteableCharacter(body,i))
 377							|| current == '\u00bb' && !UIHelper.isPositionFollowedByQuote(body,i)) {
 378						// Line start with quote
 379						lineStart = i;
 380						if (quoteStart == -1) quoteStart = i;
 381						if (i == 0) startsWithQuote = true;
 382					} else if (quoteStart >= 0) {
 383						// Line start without quote, apply spans there
 384						applyQuoteSpan(body, quoteStart, i - 1, darkBackground);
 385						quoteStart = -1;
 386					}
 387				}
 388			} else {
 389				// Remove extra spaces between > and first character in the line
 390				// > character will be removed too
 391				if (current != ' ' && lineTextStart == -1) {
 392					lineTextStart = i;
 393				}
 394				if (current == '\n') {
 395					body.delete(lineStart, lineTextStart);
 396					i -= lineTextStart - lineStart;
 397					if (i == lineStart) {
 398						// Avoid empty lines because span over empty line can be hidden
 399						body.insert(i++, " ");
 400					}
 401					lineStart = -1;
 402					lineTextStart = -1;
 403				}
 404			}
 405			previous = current;
 406		}
 407		if (quoteStart >= 0) {
 408			// Apply spans to finishing open quote
 409			applyQuoteSpan(body, quoteStart, body.length(), darkBackground);
 410		}
 411		return startsWithQuote;
 412	}
 413
 414	private void displayTextMessage(final ViewHolder viewHolder, final Message message, boolean darkBackground, int type) {
 415		viewHolder.download_button.setVisibility(View.GONE);
 416		viewHolder.image.setVisibility(View.GONE);
 417		viewHolder.audioPlayer.setVisibility(View.GONE);
 418		viewHolder.messageBody.setVisibility(View.VISIBLE);
 419
 420		viewHolder.messageBody.setTextColor(this.getMessageTextColor(darkBackground, true));
 421		viewHolder.messageBody.setLinkTextColor(this.getMessageTextColor(darkBackground, true));
 422		viewHolder.messageBody.setHighlightColor(ContextCompat.getColor(activity, darkBackground
 423				? (type == SENT || !mUseGreenBackground ? R.color.black26 : R.color.grey800) : R.color.grey500));
 424		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 425
 426		if (message.getBody() != null) {
 427			final String nick = UIHelper.getMessageDisplayName(message);
 428			SpannableStringBuilder body = message.getMergedBody();
 429			boolean hasMeCommand = message.hasMeCommand();
 430			if (hasMeCommand) {
 431				body = body.replace(0, Message.ME_COMMAND.length(), nick + " ");
 432			}
 433			if (body.length() > Config.MAX_DISPLAY_MESSAGE_CHARS) {
 434				body = new SpannableStringBuilder(body, 0, Config.MAX_DISPLAY_MESSAGE_CHARS);
 435				body.append("\u2026");
 436			}
 437			Message.MergeSeparator[] mergeSeparators = body.getSpans(0, body.length(), Message.MergeSeparator.class);
 438			for (Message.MergeSeparator mergeSeparator : mergeSeparators) {
 439				int start = body.getSpanStart(mergeSeparator);
 440				int end = body.getSpanEnd(mergeSeparator);
 441				body.setSpan(new DividerSpan(true), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 442			}
 443			boolean startsWithQuote = handleTextQuotes(body, darkBackground);
 444			if (message.getType() != Message.TYPE_PRIVATE) {
 445				if (hasMeCommand) {
 446					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 0, nick.length(),
 447							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 448				}
 449			} else {
 450				String privateMarker;
 451				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 452					privateMarker = activity.getString(R.string.private_message);
 453				} else {
 454					final String to;
 455					if (message.getCounterpart() != null) {
 456						to = message.getCounterpart().getResourcepart();
 457					} else {
 458						to = "";
 459					}
 460					privateMarker = activity.getString(R.string.private_message_to, to);
 461				}
 462				body.insert(0, privateMarker);
 463				int privateMarkerIndex = privateMarker.length();
 464				if (startsWithQuote) {
 465					body.insert(privateMarkerIndex, "\n\n");
 466					body.setSpan(new DividerSpan(false), privateMarkerIndex, privateMarkerIndex + 2,
 467							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 468				} else {
 469					body.insert(privateMarkerIndex, " ");
 470				}
 471				body.setSpan(new ForegroundColorSpan(getMessageTextColor(darkBackground, false)), 0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 472				body.setSpan(new StyleSpan(Typeface.BOLD), 0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 473				if (hasMeCommand) {
 474					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), privateMarkerIndex + 1,
 475							privateMarkerIndex + 1 + nick.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 476				}
 477			}
 478			if (message.getConversation().getMode() == Conversation.MODE_MULTI && message.getStatus() == Message.STATUS_RECEIVED) {
 479				Pattern pattern = NotificationService.generateNickHighlightPattern(message.getConversation().getMucOptions().getActualNick());
 480				Matcher matcher = pattern.matcher(body);
 481				while(matcher.find()) {
 482					body.setSpan(new StyleSpan(Typeface.BOLD), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 483				}
 484			}
 485			Matcher matcher = Emoticons.generatePattern(body).matcher(body);
 486			while(matcher.find()) {
 487				if (matcher.start() < matcher.end()) {
 488					body.setSpan(new RelativeSizeSpan(1.2f), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 489				}
 490			}
 491
 492			StylingHelper.format(body, viewHolder.messageBody.getCurrentTextColor());
 493
 494			Linkify.addLinks(body, XMPP_PATTERN, "xmpp");
 495			Linkify.addLinks(body, Patterns.AUTOLINK_WEB_URL, "http", WEBURL_MATCH_FILTER, WEBURL_TRANSFORM_FILTER);
 496			Linkify.addLinks(body, GeoHelper.GEO_URI, "geo");
 497			FixedURLSpan.fix(body);
 498			viewHolder.messageBody.setAutoLinkMask(0);
 499			viewHolder.messageBody.setText(EmojiWrapper.transform(body));
 500			viewHolder.messageBody.setTextIsSelectable(true);
 501			viewHolder.messageBody.setMovementMethod(ClickableMovementMethod.getInstance());
 502			listSelectionManager.onUpdate(viewHolder.messageBody, message);
 503		} else {
 504			viewHolder.messageBody.setText("");
 505			viewHolder.messageBody.setTextIsSelectable(false);
 506		}
 507	}
 508
 509	private void displayDownloadableMessage(ViewHolder viewHolder, final Message message, String text) {
 510		viewHolder.image.setVisibility(View.GONE);
 511		viewHolder.messageBody.setVisibility(View.GONE);
 512		viewHolder.audioPlayer.setVisibility(View.GONE);
 513		viewHolder.download_button.setVisibility(View.VISIBLE);
 514		viewHolder.download_button.setText(text);
 515		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 516
 517			@Override
 518			public void onClick(View v) {
 519				activity.startDownloadable(message);
 520			}
 521		});
 522	}
 523
 524	private void displayOpenableMessage(ViewHolder viewHolder,final Message message) {
 525		viewHolder.image.setVisibility(View.GONE);
 526		viewHolder.messageBody.setVisibility(View.GONE);
 527		viewHolder.audioPlayer.setVisibility(View.GONE);
 528		viewHolder.download_button.setVisibility(View.VISIBLE);
 529		viewHolder.download_button.setText(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity, message)));
 530		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 531
 532			@Override
 533			public void onClick(View v) {
 534				openDownloadable(message);
 535			}
 536		});
 537	}
 538
 539	private void displayLocationMessage(ViewHolder viewHolder, final Message message) {
 540		viewHolder.image.setVisibility(View.GONE);
 541		viewHolder.messageBody.setVisibility(View.GONE);
 542		viewHolder.audioPlayer.setVisibility(View.GONE);
 543		viewHolder.download_button.setVisibility(View.VISIBLE);
 544		viewHolder.download_button.setText(R.string.show_location);
 545		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 546
 547			@Override
 548			public void onClick(View v) {
 549				showLocation(message);
 550			}
 551		});
 552	}
 553
 554	private void displayAudioMessage(ViewHolder viewHolder, Message message, boolean darkBackground) {
 555		viewHolder.image.setVisibility(View.GONE);
 556		viewHolder.messageBody.setVisibility(View.GONE);
 557		viewHolder.download_button.setVisibility(View.GONE);
 558		final RelativeLayout audioPlayer = viewHolder.audioPlayer;
 559		audioPlayer.setVisibility(View.VISIBLE);
 560		AudioPlayer.ViewHolder.get(audioPlayer).setDarkBackground(darkBackground);
 561		this.audioPlayer.init(audioPlayer, message);
 562	}
 563
 564
 565	private void displayImageMessage(ViewHolder viewHolder, final Message message) {
 566		viewHolder.download_button.setVisibility(View.GONE);
 567		viewHolder.messageBody.setVisibility(View.GONE);
 568		viewHolder.audioPlayer.setVisibility(View.GONE);
 569		viewHolder.image.setVisibility(View.VISIBLE);
 570		FileParams params = message.getFileParams();
 571		double target = metrics.density * 288;
 572		int scaledW;
 573		int scaledH;
 574		if (Math.max(params.height, params.width) * metrics.density <= target) {
 575			scaledW = (int) (params.width * metrics.density);
 576			scaledH = (int) (params.height * metrics.density);
 577		} else if (Math.max(params.height,params.width) <= target) {
 578			scaledW = params.width;
 579			scaledH = params.height;
 580		} else if (params.width <= params.height) {
 581			scaledW = (int) (params.width / ((double) params.height / target));
 582			scaledH = (int) target;
 583		} else {
 584			scaledW = (int) target;
 585			scaledH = (int) (params.height / ((double) params.width / target));
 586		}
 587		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(scaledW, scaledH);
 588		layoutParams.setMargins(0, (int) (metrics.density * 4), 0, (int) (metrics.density * 4));
 589		viewHolder.image.setLayoutParams(layoutParams);
 590		activity.loadBitmap(message, viewHolder.image);
 591		viewHolder.image.setOnClickListener(new OnClickListener() {
 592
 593			@Override
 594			public void onClick(View v) {
 595				openDownloadable(message);
 596			}
 597		});
 598	}
 599
 600	private void loadMoreMessages(Conversation conversation) {
 601		conversation.setLastClearHistory(0,null);
 602		activity.xmppConnectionService.updateConversation(conversation);
 603		conversation.setHasMessagesLeftOnServer(true);
 604		conversation.setFirstMamReference(null);
 605		long timestamp = conversation.getLastMessageTransmitted().getTimestamp();
 606		if (timestamp == 0) {
 607			timestamp = System.currentTimeMillis();
 608		}
 609		conversation.messagesLoaded.set(true);
 610		MessageArchiveService.Query query = activity.xmppConnectionService.getMessageArchiveService().query(conversation, new MamReference(0), timestamp, false);
 611		if (query != null) {
 612			Toast.makeText(activity, R.string.fetching_history_from_server, Toast.LENGTH_LONG).show();
 613		} else {
 614			Toast.makeText(activity,R.string.not_fetching_history_retention_period, Toast.LENGTH_SHORT).show();
 615		}
 616	}
 617
 618	@Override
 619	public View getView(int position, View view, ViewGroup parent) {
 620		final Message message = getItem(position);
 621		final boolean omemoEncryption = message.getEncryption() == Message.ENCRYPTION_AXOLOTL;
 622		final boolean isInValidSession = message.isValidInSession() && (!omemoEncryption || message.isTrusted());
 623		final Conversation conversation = message.getConversation();
 624		final Account account = conversation.getAccount();
 625		final int type = getItemViewType(position);
 626		ViewHolder viewHolder;
 627		if (view == null) {
 628			viewHolder = new ViewHolder();
 629			switch (type) {
 630				case DATE_SEPARATOR:
 631					view = activity.getLayoutInflater().inflate(R.layout.message_date_bubble, parent, false);
 632					viewHolder.status_message = view.findViewById(R.id.message_body);
 633					viewHolder.message_box = view.findViewById(R.id.message_box);
 634					break;
 635				case SENT:
 636					view = activity.getLayoutInflater().inflate(R.layout.message_sent, parent, false);
 637					viewHolder.message_box = view.findViewById(R.id.message_box);
 638					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 639					viewHolder.download_button = view.findViewById(R.id.download_button);
 640					viewHolder.indicator = view.findViewById(R.id.security_indicator);
 641					viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
 642					viewHolder.image = view.findViewById(R.id.message_image);
 643					viewHolder.messageBody = view.findViewById(R.id.message_body);
 644					viewHolder.time = view.findViewById(R.id.message_time);
 645					viewHolder.indicatorReceived = view.findViewById(R.id.indicator_received);
 646					viewHolder.audioPlayer = view.findViewById(R.id.audio_player);
 647					break;
 648				case RECEIVED:
 649					view = activity.getLayoutInflater().inflate(R.layout.message_received, parent, false);
 650					viewHolder.message_box = view.findViewById(R.id.message_box);
 651					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 652					viewHolder.download_button = view.findViewById(R.id.download_button);
 653					viewHolder.indicator = view.findViewById(R.id.security_indicator);
 654					viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
 655					viewHolder.image = view.findViewById(R.id.message_image);
 656					viewHolder.messageBody = view.findViewById(R.id.message_body);
 657					viewHolder.time = view.findViewById(R.id.message_time);
 658					viewHolder.indicatorReceived = view.findViewById(R.id.indicator_received);
 659					viewHolder.encryption = view.findViewById(R.id.message_encryption);
 660					viewHolder.audioPlayer = view.findViewById(R.id.audio_player);
 661					break;
 662				case STATUS:
 663					view = activity.getLayoutInflater().inflate(R.layout.message_status, parent, false);
 664					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 665					viewHolder.status_message = view.findViewById(R.id.status_message);
 666					viewHolder.load_more_messages = view.findViewById(R.id.load_more_messages);
 667					break;
 668				default:
 669					throw new AssertionError("Unknown view type");
 670			}
 671			if (viewHolder.messageBody != null) {
 672				listSelectionManager.onCreate(viewHolder.messageBody,
 673						new MessageBodyActionModeCallback(viewHolder.messageBody));
 674				viewHolder.messageBody.setCopyHandler(this);
 675			}
 676			view.setTag(viewHolder);
 677		} else {
 678			viewHolder = (ViewHolder) view.getTag();
 679			if (viewHolder == null) {
 680				return view;
 681			}
 682		}
 683
 684		boolean darkBackground = type == RECEIVED && (!isInValidSession || mUseGreenBackground) || activity.isDarkTheme();
 685
 686		if (type == DATE_SEPARATOR) {
 687			if (UIHelper.today(message.getTimeSent())) {
 688				viewHolder.status_message.setText(R.string.today);
 689			} else if (UIHelper.yesterday(message.getTimeSent())) {
 690				viewHolder.status_message.setText(R.string.yesterday);
 691			} else {
 692				viewHolder.status_message.setText(DateUtils.formatDateTime(activity,message.getTimeSent(),DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR));
 693			}
 694			viewHolder.message_box.setBackgroundResource(activity.isDarkTheme() ? R.drawable.date_bubble_grey : R.drawable.date_bubble_white);
 695			viewHolder.status_message.setTextColor(activity.getSecondaryTextColor());
 696			return view;
 697		} else if (type == STATUS) {
 698			if ("LOAD_MORE".equals(message.getBody())) {
 699				viewHolder.status_message.setVisibility(View.GONE);
 700				viewHolder.contact_picture.setVisibility(View.GONE);
 701				viewHolder.load_more_messages.setVisibility(View.VISIBLE);
 702				viewHolder.load_more_messages.setOnClickListener(new OnClickListener() {
 703					@Override
 704					public void onClick(View v) {
 705						loadMoreMessages(message.getConversation());
 706					}
 707				});
 708			} else {
 709				viewHolder.status_message.setVisibility(View.VISIBLE);
 710				viewHolder.load_more_messages.setVisibility(View.GONE);
 711				viewHolder.status_message.setText(message.getBody());
 712				boolean showAvatar;
 713				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 714					showAvatar = true;
 715					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 716				} else if (message.getCounterpart() != null || message.getTrueCounterpart() != null || (message.getCounterparts() != null && message.getCounterparts().size() > 0)) {
 717					showAvatar = true;
 718					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 719				} else {
 720					showAvatar = false;
 721				}
 722				if (showAvatar) {
 723					viewHolder.contact_picture.setAlpha(0.5f);
 724					viewHolder.contact_picture.setVisibility(View.VISIBLE);
 725				} else {
 726					viewHolder.contact_picture.setVisibility(View.GONE);
 727				}
 728			}
 729			return view;
 730		} else {
 731			loadAvatar(message, viewHolder.contact_picture,activity.getPixel(48));
 732		}
 733
 734		viewHolder.contact_picture
 735			.setOnClickListener(new OnClickListener() {
 736
 737				@Override
 738				public void onClick(View v) {
 739					if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
 740						MessageAdapter.this.mOnContactPictureClickedListener
 741								.onContactPictureClicked(message);
 742					}
 743
 744				}
 745			});
 746		viewHolder.contact_picture
 747			.setOnLongClickListener(new OnLongClickListener() {
 748
 749				@Override
 750				public boolean onLongClick(View v) {
 751					if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
 752						MessageAdapter.this.mOnContactPictureLongClickedListener
 753								.onContactPictureLongClicked(message);
 754						return true;
 755					} else {
 756						return false;
 757					}
 758				}
 759			});
 760
 761		final Transferable transferable = message.getTransferable();
 762		if (transferable != null && transferable.getStatus() != Transferable.STATUS_UPLOADING) {
 763			if (transferable.getStatus() == Transferable.STATUS_OFFER) {
 764				displayDownloadableMessage(viewHolder,message,activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, message)));
 765			} else if (transferable.getStatus() == Transferable.STATUS_OFFER_CHECK_FILESIZE) {
 766				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 767			} else {
 768				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first,darkBackground);
 769			}
 770		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 771			displayImageMessage(viewHolder, message);
 772		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 773			if (message.getFileParams().width > 0 && message.getFileParams().height > 0) {
 774				displayImageMessage(viewHolder, message);
 775			} else if (message.getFileParams().runtime > 0) {
 776				displayAudioMessage(viewHolder, message, darkBackground);
 777			} else {
 778				displayOpenableMessage(viewHolder, message);
 779			}
 780		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 781			if (account.isPgpDecryptionServiceConnected()) {
 782				if (!account.hasPendingPgpIntent(conversation)) {
 783					displayInfoMessage(viewHolder, activity.getString(R.string.message_decrypting), darkBackground);
 784				} else {
 785					displayInfoMessage(viewHolder, activity.getString(R.string.pgp_message), darkBackground);
 786				}
 787			} else {
 788				displayInfoMessage(viewHolder,activity.getString(R.string.install_openkeychain),darkBackground);
 789				viewHolder.message_box.setOnClickListener(new OnClickListener() {
 790
 791							@Override
 792							public void onClick(View v) {
 793								activity.showInstallPgpDialog();
 794							}
 795						});
 796			}
 797		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
 798			displayDecryptionFailed(viewHolder,darkBackground);
 799		} else {
 800			if (message.isGeoUri()) {
 801				displayLocationMessage(viewHolder,message);
 802			} else if (message.bodyIsOnlyEmojis() && message.getType() != Message.TYPE_PRIVATE) {
 803				displayEmojiMessage(viewHolder, message.getBody().trim());
 804			} else if (message.treatAsDownloadable()) {
 805				try {
 806					URL url = new URL(message.getBody());
 807					displayDownloadableMessage(viewHolder,
 808							message,
 809							activity.getString(R.string.check_x_filesize_on_host,
 810									UIHelper.getFileDescriptionString(activity, message),
 811									url.getHost()));
 812				} catch (Exception e) {
 813					displayDownloadableMessage(viewHolder,
 814							message,
 815							activity.getString(R.string.check_x_filesize,
 816									UIHelper.getFileDescriptionString(activity, message)));
 817				}
 818			} else {
 819				displayTextMessage(viewHolder, message, darkBackground, type);
 820			}
 821		}
 822
 823		if (type == RECEIVED) {
 824			if(isInValidSession) {
 825				int bubble;
 826				if (!mUseGreenBackground) {
 827					bubble = activity.getThemeResource(R.attr.message_bubble_received_monochrome, R.drawable.message_bubble_received_white);
 828				} else {
 829					bubble = activity.getThemeResource(R.attr.message_bubble_received_green, R.drawable.message_bubble_received);
 830				}
 831				viewHolder.message_box.setBackgroundResource(bubble);
 832				viewHolder.encryption.setVisibility(View.GONE);
 833			} else {
 834				viewHolder.message_box.setBackgroundResource(R.drawable.message_bubble_received_warning);
 835				viewHolder.encryption.setVisibility(View.VISIBLE);
 836				if (omemoEncryption && !message.isTrusted()) {
 837					viewHolder.encryption.setText(R.string.not_trusted);
 838				} else {
 839					viewHolder.encryption.setText(CryptoHelper.encryptionTypeToText(message.getEncryption()));
 840				}
 841			}
 842		}
 843
 844		displayStatus(viewHolder, message, type, darkBackground);
 845
 846		return view;
 847	}
 848
 849	@Override
 850	public void notifyDataSetChanged() {
 851		listSelectionManager.onBeforeNotifyDataSetChanged();
 852		super.notifyDataSetChanged();
 853		listSelectionManager.onAfterNotifyDataSetChanged();
 854	}
 855
 856	private String transformText(CharSequence text, int start, int end, boolean forCopy) {
 857		SpannableStringBuilder builder = new SpannableStringBuilder(text);
 858		Object copySpan = new Object();
 859		builder.setSpan(copySpan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 860		DividerSpan[] dividerSpans = builder.getSpans(0, builder.length(), DividerSpan.class);
 861		for (DividerSpan dividerSpan : dividerSpans) {
 862			builder.replace(builder.getSpanStart(dividerSpan), builder.getSpanEnd(dividerSpan),
 863					dividerSpan.isLarge() ? "\n\n" : "\n");
 864		}
 865		start = builder.getSpanStart(copySpan);
 866		end = builder.getSpanEnd(copySpan);
 867		if (start == -1 || end == -1) return "";
 868		builder = new SpannableStringBuilder(builder, start, end);
 869		if (forCopy) {
 870			QuoteSpan[] quoteSpans = builder.getSpans(0, builder.length(), QuoteSpan.class);
 871			for (QuoteSpan quoteSpan : quoteSpans) {
 872				builder.insert(builder.getSpanStart(quoteSpan), "> ");
 873			}
 874		}
 875		return builder.toString();
 876	}
 877
 878	@Override
 879	public String transformTextForCopy(CharSequence text, int start, int end) {
 880		if (text instanceof Spanned) {
 881			return transformText(text, start, end, true);
 882		} else {
 883			return text.toString().substring(start, end);
 884		}
 885	}
 886
 887	public FileBackend getFileBackend() {
 888		return activity.xmppConnectionService.getFileBackend();
 889	}
 890
 891	public void stopAudioPlayer() {
 892		audioPlayer.stop();
 893	}
 894
 895	public interface OnQuoteListener {
 896		public void onQuote(String text);
 897	}
 898
 899	private class MessageBodyActionModeCallback implements ActionMode.Callback {
 900
 901		private final TextView textView;
 902
 903		public MessageBodyActionModeCallback(TextView textView) {
 904			this.textView = textView;
 905		}
 906
 907		@Override
 908		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 909			if (onQuoteListener != null) {
 910				int quoteResId = activity.getThemeResource(R.attr.icon_quote, R.drawable.ic_action_reply);
 911				// 3rd item is placed after "copy" item
 912				menu.add(0, android.R.id.button1, 3, R.string.quote).setIcon(quoteResId)
 913						.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
 914			}
 915			return false;
 916		}
 917
 918		@Override
 919		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 920			return false;
 921		}
 922
 923		@Override
 924		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 925			if (item.getItemId() == android.R.id.button1) {
 926				int start = textView.getSelectionStart();
 927				int end = textView.getSelectionEnd();
 928				if (end > start) {
 929					String text = transformText(textView.getText(), start, end, false);
 930					if (onQuoteListener != null) {
 931						onQuoteListener.onQuote(text);
 932					}
 933					mode.finish();
 934				}
 935				return true;
 936			}
 937			return false;
 938		}
 939
 940		@Override
 941		public void onDestroyActionMode(ActionMode mode) {}
 942	}
 943
 944	public void openDownloadable(Message message) {
 945		DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 946		if (!file.exists()) {
 947			Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
 948			return;
 949		}
 950		Intent openIntent = new Intent(Intent.ACTION_VIEW);
 951		String mime = file.getMimeType();
 952		if (mime == null) {
 953			mime = "*/*";
 954		}
 955		Uri uri;
 956		try {
 957			uri = FileBackend.getUriForFile(activity, file);
 958		} catch (SecurityException e) {
 959			Log.d(Config.LOGTAG,"No permission to access "+file.getAbsolutePath(),e);
 960			Toast.makeText(activity, activity.getString(R.string.no_permission_to_access_x, file.getAbsolutePath()), Toast.LENGTH_SHORT).show();
 961			return;
 962		}
 963		openIntent.setDataAndType(uri, mime);
 964		openIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 965		PackageManager manager = activity.getPackageManager();
 966		List<ResolveInfo> info = manager.queryIntentActivities(openIntent, 0);
 967		if (info.size() == 0) {
 968			openIntent.setDataAndType(uri,"*/*");
 969		}
 970		try {
 971			getContext().startActivity(openIntent);
 972		}  catch (ActivityNotFoundException e) {
 973			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
 974		}
 975	}
 976
 977	public void showLocation(Message message) {
 978		for(Intent intent : GeoHelper.createGeoIntentsFromMessage(message)) {
 979			if (intent.resolveActivity(getContext().getPackageManager()) != null) {
 980				getContext().startActivity(intent);
 981				return;
 982			}
 983		}
 984		Toast.makeText(activity,R.string.no_application_found_to_display_location,Toast.LENGTH_SHORT).show();
 985	}
 986
 987	public void updatePreferences() {
 988		this.mIndicateReceived = activity.indicateReceived();
 989		this.mUseGreenBackground = activity.useGreenBackground();
 990	}
 991
 992	public TextView getMessageBody(View view) {
 993		final Object tag = view.getTag();
 994		if (tag instanceof ViewHolder) {
 995			final ViewHolder viewHolder = (ViewHolder) tag;
 996			return viewHolder.messageBody;
 997		}
 998		return null;
 999	}
1000
1001	public interface OnContactPictureClicked {
1002		void onContactPictureClicked(Message message);
1003	}
1004
1005	public interface OnContactPictureLongClicked {
1006		void onContactPictureLongClicked(Message message);
1007	}
1008
1009	private static class ViewHolder {
1010
1011		protected LinearLayout message_box;
1012		protected Button download_button;
1013		protected ImageView image;
1014		protected ImageView indicator;
1015		protected ImageView indicatorReceived;
1016		protected TextView time;
1017		protected CopyTextView messageBody;
1018		protected ImageView contact_picture;
1019		protected TextView status_message;
1020		protected TextView encryption;
1021		public Button load_more_messages;
1022		public ImageView edit_indicator;
1023		public RelativeLayout audioPlayer;
1024	}
1025
1026	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
1027		private final WeakReference<ImageView> imageViewReference;
1028		private Message message = null;
1029		private final int size;
1030
1031		public BitmapWorkerTask(ImageView imageView, int size) {
1032			imageViewReference = new WeakReference<>(imageView);
1033			this.size = size;
1034		}
1035
1036		@Override
1037		protected Bitmap doInBackground(Message... params) {
1038			return activity.avatarService().get(params[0], size, isCancelled());
1039		}
1040
1041		@Override
1042		protected void onPostExecute(Bitmap bitmap) {
1043			if (bitmap != null && !isCancelled()) {
1044				final ImageView imageView = imageViewReference.get();
1045				if (imageView != null) {
1046					imageView.setImageBitmap(bitmap);
1047					imageView.setBackgroundColor(0x00000000);
1048				}
1049			}
1050		}
1051	}
1052
1053	public void loadAvatar(Message message, ImageView imageView, int size) {
1054		if (cancelPotentialWork(message, imageView)) {
1055			final Bitmap bm = activity.avatarService().get(message, size, true);
1056			if (bm != null) {
1057				cancelPotentialWork(message, imageView);
1058				imageView.setImageBitmap(bm);
1059				imageView.setBackgroundColor(Color.TRANSPARENT);
1060			} else {
1061				@ColorInt int bg;
1062				if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
1063					bg = Color.TRANSPARENT;
1064				} else {
1065					bg = UIHelper.getColorForName(UIHelper.getMessageDisplayName(message));
1066				}
1067				imageView.setBackgroundColor(bg);
1068				imageView.setImageDrawable(null);
1069				final BitmapWorkerTask task = new BitmapWorkerTask(imageView, size);
1070				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
1071				imageView.setImageDrawable(asyncDrawable);
1072				try {
1073					task.execute(message);
1074				} catch (final RejectedExecutionException ignored) {
1075				}
1076			}
1077		}
1078	}
1079
1080	public static boolean cancelPotentialWork(Message message, ImageView imageView) {
1081		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
1082
1083		if (bitmapWorkerTask != null) {
1084			final Message oldMessage = bitmapWorkerTask.message;
1085			if (oldMessage == null || message != oldMessage) {
1086				bitmapWorkerTask.cancel(true);
1087			} else {
1088				return false;
1089			}
1090		}
1091		return true;
1092	}
1093
1094	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
1095		if (imageView != null) {
1096			final Drawable drawable = imageView.getDrawable();
1097			if (drawable instanceof AsyncDrawable) {
1098				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
1099				return asyncDrawable.getBitmapWorkerTask();
1100			}
1101		}
1102		return null;
1103	}
1104
1105	static class AsyncDrawable extends BitmapDrawable {
1106		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
1107
1108		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
1109			super(res, bitmap);
1110			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
1111		}
1112
1113		public BitmapWorkerTask getBitmapWorkerTask() {
1114			return bitmapWorkerTaskReference.get();
1115		}
1116	}
1117}