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.ConversationActivity;
  67import eu.siacs.conversations.ui.ConversationsMainActivity;
  68import eu.siacs.conversations.ui.XmppActivity;
  69import eu.siacs.conversations.ui.service.AudioPlayer;
  70import eu.siacs.conversations.ui.text.DividerSpan;
  71import eu.siacs.conversations.ui.text.FixedURLSpan;
  72import eu.siacs.conversations.ui.text.QuoteSpan;
  73import eu.siacs.conversations.ui.widget.ClickableMovementMethod;
  74import eu.siacs.conversations.ui.widget.CopyTextView;
  75import eu.siacs.conversations.ui.widget.ListSelectionManager;
  76import eu.siacs.conversations.utils.CryptoHelper;
  77import eu.siacs.conversations.utils.EmojiWrapper;
  78import eu.siacs.conversations.utils.Emoticons;
  79import eu.siacs.conversations.utils.GeoHelper;
  80import eu.siacs.conversations.utils.Patterns;
  81import eu.siacs.conversations.utils.StylingHelper;
  82import eu.siacs.conversations.utils.UIHelper;
  83import eu.siacs.conversations.utils.XmppUri;
  84import eu.siacs.conversations.xmpp.mam.MamReference;
  85
  86public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextView.CopyHandler {
  87
  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
  93	public static final String DATE_SEPARATOR_BODY = "DATE_SEPARATOR";
  94
  95	private static final Pattern XMPP_PATTERN = Pattern
  96			.compile("xmpp\\:(?:(?:["
  97					+ Patterns.GOOD_IRI_CHAR
  98					+ "\\;\\/\\?\\@\\&\\=\\#\\~\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])"
  99					+ "|(?:\\%[a-fA-F0-9]{2}))+");
 100
 101	private static final Linkify.TransformFilter WEBURL_TRANSFORM_FILTER = new Linkify.TransformFilter() {
 102		@Override
 103		public String transformUrl(Matcher matcher, String url) {
 104			if (url == null) {
 105				return null;
 106			}
 107			final String lcUrl = url.toLowerCase(Locale.US);
 108			if (lcUrl.startsWith("http://") || lcUrl.startsWith("https://")) {
 109				return url;
 110			} else {
 111				return "http://"+url;
 112			}
 113		}
 114	};
 115	private static final Linkify.MatchFilter WEBURL_MATCH_FILTER = new Linkify.MatchFilter() {
 116		@Override
 117		public boolean acceptMatch(CharSequence cs, int start, int end) {
 118			return start < 1 || (cs.charAt(start-1) != '@' && cs.charAt(start-1) != '.' && !cs.subSequence(Math.max(0,start - 3),start).equals("://"));
 119		}
 120	};
 121
 122	private static final Linkify.MatchFilter XMPPURI_MATCH_FILTER = new Linkify.MatchFilter() {
 123		@Override
 124		public boolean acceptMatch(CharSequence s, int start, int end) {
 125			XmppUri uri = new XmppUri(s.subSequence(start,end).toString());
 126			return uri.isJidValid();
 127		}
 128	};
 129
 130	private final XmppActivity activity;
 131
 132	private DisplayMetrics metrics;
 133
 134	private OnContactPictureClicked mOnContactPictureClickedListener;
 135	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;
 136
 137	private boolean mIndicateReceived = false;
 138	private boolean mUseGreenBackground = false;
 139
 140	private OnQuoteListener onQuoteListener;
 141
 142	private final ListSelectionManager listSelectionManager = new ListSelectionManager();
 143
 144	private final AudioPlayer audioPlayer;
 145
 146	public MessageAdapter(XmppActivity activity, List<Message> messages) {
 147		super(activity, 0, messages);
 148		this.audioPlayer = new AudioPlayer(this);
 149		this.activity = activity;
 150		metrics = getContext().getResources().getDisplayMetrics();
 151		updatePreferences();
 152	}
 153
 154	public void flagScreenOn() {
 155		activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
 156	}
 157
 158	public void flagScreenOff() {
 159		activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
 160	}
 161
 162	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
 163		this.mOnContactPictureClickedListener = listener;
 164	}
 165
 166	public void setOnContactPictureLongClicked(
 167			OnContactPictureLongClicked listener) {
 168		this.mOnContactPictureLongClickedListener = listener;
 169			}
 170
 171	public void setOnQuoteListener(OnQuoteListener listener) {
 172		this.onQuoteListener = listener;
 173	}
 174
 175	@Override
 176	public int getViewTypeCount() {
 177		return 4;
 178	}
 179
 180	public int getItemViewType(Message message) {
 181		if (message.getType() == Message.TYPE_STATUS) {
 182			if (DATE_SEPARATOR_BODY.equals(message.getBody())) {
 183				return DATE_SEPARATOR;
 184			} else {
 185				return STATUS;
 186			}
 187		} else if (message.getStatus() <= Message.STATUS_RECEIVED) {
 188			return RECEIVED;
 189		}
 190
 191		return SENT;
 192	}
 193
 194	@Override
 195	public int getItemViewType(int position) {
 196		return this.getItemViewType(getItem(position));
 197	}
 198
 199	public int getMessageTextColor(boolean onDark, boolean primary) {
 200		if (onDark) {
 201			return ContextCompat.getColor(activity, primary ? R.color.white : R.color.white70);
 202		} else {
 203			return ContextCompat.getColor(activity, primary ? R.color.black87 : R.color.black54);
 204		}
 205	}
 206
 207	private void displayStatus(ViewHolder viewHolder, Message message, int type, boolean darkBackground) {
 208		String filesize = null;
 209		String info = null;
 210		boolean error = false;
 211		if (viewHolder.indicatorReceived != null) {
 212			viewHolder.indicatorReceived.setVisibility(View.GONE);
 213		}
 214
 215		if (viewHolder.edit_indicator != null) {
 216			if (message.edited()) {
 217				viewHolder.edit_indicator.setVisibility(View.VISIBLE);
 218				viewHolder.edit_indicator.setImageResource(darkBackground ? R.drawable.ic_mode_edit_white_18dp : R.drawable.ic_mode_edit_black_18dp);
 219				viewHolder.edit_indicator.setAlpha(darkBackground ? 0.7f : 0.57f);
 220			} else {
 221				viewHolder.edit_indicator.setVisibility(View.GONE);
 222			}
 223		}
 224		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 225			&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
 226		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getTransferable() != null) {
 227			FileParams params = message.getFileParams();
 228			if (params.size > (1.5 * 1024 * 1024)) {
 229				filesize = Math.round(params.size * 1f/ (1024 * 1024))+ " MiB";
 230			} else if (params.size >= 1024) {
 231				filesize = Math.round(params.size * 1f/ 1024) + " KiB";
 232			} else if (params.size > 0){
 233				filesize = params.size + " B";
 234			}
 235			if (message.getTransferable() != null && message.getTransferable().getStatus() == Transferable.STATUS_FAILED) {
 236				error = true;
 237			}
 238		}
 239		switch (message.getMergedStatus()) {
 240			case Message.STATUS_WAITING:
 241				info = getContext().getString(R.string.waiting);
 242				break;
 243			case Message.STATUS_UNSEND:
 244				Transferable d = message.getTransferable();
 245				if (d!=null) {
 246					info = getContext().getString(R.string.sending_file,d.getProgress());
 247				} else {
 248					info = getContext().getString(R.string.sending);
 249				}
 250				break;
 251			case Message.STATUS_OFFERED:
 252				info = getContext().getString(R.string.offering);
 253				break;
 254			case Message.STATUS_SEND_RECEIVED:
 255				if (mIndicateReceived) {
 256					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 257				}
 258				break;
 259			case Message.STATUS_SEND_DISPLAYED:
 260				if (mIndicateReceived) {
 261					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 262				}
 263				break;
 264			case Message.STATUS_SEND_FAILED:
 265				info = getContext().getString(R.string.send_failed);
 266				error = true;
 267				break;
 268			default:
 269				if (multiReceived) {
 270					info = UIHelper.getMessageDisplayName(message);
 271				}
 272				break;
 273		}
 274		if (error && type == SENT) {
 275			viewHolder.time.setTextColor(activity.getWarningTextColor());
 276		} else {
 277			viewHolder.time.setTextColor(this.getMessageTextColor(darkBackground,false));
 278		}
 279		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 280			viewHolder.indicator.setVisibility(View.GONE);
 281		} else {
 282			boolean verified = false;
 283			if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
 284				final FingerprintStatus status = message.getConversation()
 285						.getAccount().getAxolotlService().getFingerprintTrust(
 286								message.getFingerprint());
 287				if (status != null && status.isVerified()) {
 288					verified = true;
 289				}
 290			}
 291			if (verified) {
 292				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_verified_user_white_18dp : R.drawable.ic_verified_user_black_18dp);
 293			} else {
 294				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
 295			}
 296			if (darkBackground) {
 297				viewHolder.indicator.setAlpha(0.7f);
 298			} else {
 299				viewHolder.indicator.setAlpha(0.57f);
 300			}
 301			viewHolder.indicator.setVisibility(View.VISIBLE);
 302		}
 303
 304		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(), message.getMergedTimeSent());
 305		if (message.getStatus() <= Message.STATUS_RECEIVED) {
 306			if ((filesize != null) && (info != null)) {
 307				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize +" \u00B7 " + info);
 308			} else if ((filesize == null) && (info != null)) {
 309				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
 310			} else if ((filesize != null) && (info == null)) {
 311				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize);
 312			} else {
 313				viewHolder.time.setText(formatedTime);
 314			}
 315		} else {
 316			if ((filesize != null) && (info != null)) {
 317				viewHolder.time.setText(filesize + " \u00B7 " + info);
 318			} else if ((filesize == null) && (info != null)) {
 319				if (error) {
 320					viewHolder.time.setText(info + " \u00B7 " + formatedTime);
 321				} else {
 322					viewHolder.time.setText(info);
 323				}
 324			} else if ((filesize != null) && (info == null)) {
 325				viewHolder.time.setText(filesize + " \u00B7 " + formatedTime);
 326			} else {
 327				viewHolder.time.setText(formatedTime);
 328			}
 329		}
 330	}
 331
 332	private void displayInfoMessage(ViewHolder viewHolder, String text, boolean darkBackground) {
 333		viewHolder.download_button.setVisibility(View.GONE);
 334		viewHolder.audioPlayer.setVisibility(View.GONE);
 335		viewHolder.image.setVisibility(View.GONE);
 336		viewHolder.messageBody.setVisibility(View.VISIBLE);
 337		viewHolder.messageBody.setText(text);
 338		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 339		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
 340		viewHolder.messageBody.setTextIsSelectable(false);
 341	}
 342
 343	private void displayDecryptionFailed(ViewHolder viewHolder, boolean darkBackground) {
 344		viewHolder.download_button.setVisibility(View.GONE);
 345		viewHolder.image.setVisibility(View.GONE);
 346		viewHolder.audioPlayer.setVisibility(View.GONE);
 347		viewHolder.messageBody.setVisibility(View.VISIBLE);
 348		viewHolder.messageBody.setText(getContext().getString(
 349				R.string.decryption_failed));
 350		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 351		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 352		viewHolder.messageBody.setTextIsSelectable(false);
 353	}
 354
 355	private void displayEmojiMessage(final ViewHolder viewHolder, final String body) {
 356		viewHolder.download_button.setVisibility(View.GONE);
 357		viewHolder.audioPlayer.setVisibility(View.GONE);
 358		viewHolder.image.setVisibility(View.GONE);
 359		viewHolder.messageBody.setVisibility(View.VISIBLE);
 360		Spannable span = new SpannableString(body);
 361		float size = Emoticons.isEmoji(body) ? 3.0f : 2.0f;
 362		span.setSpan(new RelativeSizeSpan(size), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 363		viewHolder.messageBody.setText(EmojiWrapper.transform(span));
 364	}
 365
 366	private int applyQuoteSpan(SpannableStringBuilder body, int start, int end, boolean darkBackground) {
 367		if (start > 1 && !"\n\n".equals(body.subSequence(start - 2, start).toString())) {
 368			body.insert(start++, "\n");
 369			body.setSpan(new DividerSpan(false), start - 2, start, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 370			end++;
 371		}
 372		if (end < body.length() - 1 && !"\n\n".equals(body.subSequence(end, end + 2).toString())) {
 373			body.insert(end, "\n");
 374			body.setSpan(new DividerSpan(false), end, end + 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 375		}
 376		int color = darkBackground ? this.getMessageTextColor(darkBackground, false)
 377				: ContextCompat.getColor(activity, R.color.bubble);
 378		DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
 379		body.setSpan(new QuoteSpan(color, metrics), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 380		return 0;
 381	}
 382
 383	/**
 384	 * Applies QuoteSpan to group of lines which starts with > or » characters.
 385	 * Appends likebreaks and applies DividerSpan to them to show a padding between quote and text.
 386	 */
 387	private boolean handleTextQuotes(SpannableStringBuilder body, boolean darkBackground) {
 388		boolean startsWithQuote = false;
 389		char previous = '\n';
 390		int lineStart = -1;
 391		int lineTextStart = -1;
 392		int quoteStart = -1;
 393		for (int i = 0; i <= body.length(); i++) {
 394			char current = body.length() > i ? body.charAt(i) : '\n';
 395			if (lineStart == -1) {
 396				if (previous == '\n') {
 397					if ((current == '>' && UIHelper.isPositionFollowedByQuoteableCharacter(body,i))
 398							|| current == '\u00bb' && !UIHelper.isPositionFollowedByQuote(body,i)) {
 399						// Line start with quote
 400						lineStart = i;
 401						if (quoteStart == -1) quoteStart = i;
 402						if (i == 0) startsWithQuote = true;
 403					} else if (quoteStart >= 0) {
 404						// Line start without quote, apply spans there
 405						applyQuoteSpan(body, quoteStart, i - 1, darkBackground);
 406						quoteStart = -1;
 407					}
 408				}
 409			} else {
 410				// Remove extra spaces between > and first character in the line
 411				// > character will be removed too
 412				if (current != ' ' && lineTextStart == -1) {
 413					lineTextStart = i;
 414				}
 415				if (current == '\n') {
 416					body.delete(lineStart, lineTextStart);
 417					i -= lineTextStart - lineStart;
 418					if (i == lineStart) {
 419						// Avoid empty lines because span over empty line can be hidden
 420						body.insert(i++, " ");
 421					}
 422					lineStart = -1;
 423					lineTextStart = -1;
 424				}
 425			}
 426			previous = current;
 427		}
 428		if (quoteStart >= 0) {
 429			// Apply spans to finishing open quote
 430			applyQuoteSpan(body, quoteStart, body.length(), darkBackground);
 431		}
 432		return startsWithQuote;
 433	}
 434
 435	private void displayTextMessage(final ViewHolder viewHolder, final Message message, boolean darkBackground, int type) {
 436		viewHolder.download_button.setVisibility(View.GONE);
 437		viewHolder.image.setVisibility(View.GONE);
 438		viewHolder.audioPlayer.setVisibility(View.GONE);
 439		viewHolder.messageBody.setVisibility(View.VISIBLE);
 440
 441		viewHolder.messageBody.setTextColor(this.getMessageTextColor(darkBackground, true));
 442		viewHolder.messageBody.setLinkTextColor(this.getMessageTextColor(darkBackground, true));
 443		viewHolder.messageBody.setHighlightColor(ContextCompat.getColor(activity, darkBackground
 444				? (type == SENT || !mUseGreenBackground ? R.color.black26 : R.color.grey800) : R.color.grey500));
 445		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 446
 447		if (message.getBody() != null) {
 448			final String nick = UIHelper.getMessageDisplayName(message);
 449			SpannableStringBuilder body = message.getMergedBody();
 450			boolean hasMeCommand = message.hasMeCommand();
 451			if (hasMeCommand) {
 452				body = body.replace(0, Message.ME_COMMAND.length(), nick + " ");
 453			}
 454			if (body.length() > Config.MAX_DISPLAY_MESSAGE_CHARS) {
 455				body = new SpannableStringBuilder(body, 0, Config.MAX_DISPLAY_MESSAGE_CHARS);
 456				body.append("\u2026");
 457			}
 458			Message.MergeSeparator[] mergeSeparators = body.getSpans(0, body.length(), Message.MergeSeparator.class);
 459			for (Message.MergeSeparator mergeSeparator : mergeSeparators) {
 460				int start = body.getSpanStart(mergeSeparator);
 461				int end = body.getSpanEnd(mergeSeparator);
 462				body.setSpan(new DividerSpan(true), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 463			}
 464			boolean startsWithQuote = handleTextQuotes(body, darkBackground);
 465			if (message.getType() != Message.TYPE_PRIVATE) {
 466				if (hasMeCommand) {
 467					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 0, nick.length(),
 468							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 469				}
 470			} else {
 471				String privateMarker;
 472				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 473					privateMarker = activity.getString(R.string.private_message);
 474				} else {
 475					final String to;
 476					if (message.getCounterpart() != null) {
 477						to = message.getCounterpart().getResourcepart();
 478					} else {
 479						to = "";
 480					}
 481					privateMarker = activity.getString(R.string.private_message_to, to);
 482				}
 483				body.insert(0, privateMarker);
 484				int privateMarkerIndex = privateMarker.length();
 485				if (startsWithQuote) {
 486					body.insert(privateMarkerIndex, "\n\n");
 487					body.setSpan(new DividerSpan(false), privateMarkerIndex, privateMarkerIndex + 2,
 488							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 489				} else {
 490					body.insert(privateMarkerIndex, " ");
 491				}
 492				body.setSpan(new ForegroundColorSpan(getMessageTextColor(darkBackground, false)), 0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 493				body.setSpan(new StyleSpan(Typeface.BOLD), 0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 494				if (hasMeCommand) {
 495					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), privateMarkerIndex + 1,
 496							privateMarkerIndex + 1 + nick.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 497				}
 498			}
 499			if (message.getConversation().getMode() == Conversation.MODE_MULTI && message.getStatus() == Message.STATUS_RECEIVED) {
 500				Pattern pattern = NotificationService.generateNickHighlightPattern(message.getConversation().getMucOptions().getActualNick());
 501				Matcher matcher = pattern.matcher(body);
 502				while(matcher.find()) {
 503					body.setSpan(new StyleSpan(Typeface.BOLD), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 504				}
 505			}
 506			Matcher matcher = Emoticons.generatePattern(body).matcher(body);
 507			while(matcher.find()) {
 508				if (matcher.start() < matcher.end()) {
 509					body.setSpan(new RelativeSizeSpan(1.2f), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 510				}
 511			}
 512
 513			StylingHelper.format(body, viewHolder.messageBody.getCurrentTextColor());
 514
 515			Linkify.addLinks(body, XMPP_PATTERN, "xmpp", XMPPURI_MATCH_FILTER, null);
 516			Linkify.addLinks(body, Patterns.AUTOLINK_WEB_URL, "http", WEBURL_MATCH_FILTER, WEBURL_TRANSFORM_FILTER);
 517			Linkify.addLinks(body, GeoHelper.GEO_URI, "geo");
 518			FixedURLSpan.fix(body);
 519			viewHolder.messageBody.setAutoLinkMask(0);
 520			viewHolder.messageBody.setText(EmojiWrapper.transform(body));
 521			viewHolder.messageBody.setTextIsSelectable(true);
 522			viewHolder.messageBody.setMovementMethod(ClickableMovementMethod.getInstance());
 523			listSelectionManager.onUpdate(viewHolder.messageBody, message);
 524		} else {
 525			viewHolder.messageBody.setText("");
 526			viewHolder.messageBody.setTextIsSelectable(false);
 527		}
 528	}
 529
 530	private void displayDownloadableMessage(ViewHolder viewHolder, final Message message, String text) {
 531		viewHolder.image.setVisibility(View.GONE);
 532		viewHolder.messageBody.setVisibility(View.GONE);
 533		viewHolder.audioPlayer.setVisibility(View.GONE);
 534		viewHolder.download_button.setVisibility(View.VISIBLE);
 535		viewHolder.download_button.setText(text);
 536		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 537
 538			@Override
 539			public void onClick(View v) {
 540				//TODO make proper reference to fragment
 541				//activity.startDownloadable(message);
 542			}
 543		});
 544	}
 545
 546	private void displayOpenableMessage(ViewHolder viewHolder,final Message message) {
 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(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity, message)));
 552		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 553
 554			@Override
 555			public void onClick(View v) {
 556				openDownloadable(message);
 557			}
 558		});
 559	}
 560
 561	private void displayLocationMessage(ViewHolder viewHolder, final Message message) {
 562		viewHolder.image.setVisibility(View.GONE);
 563		viewHolder.messageBody.setVisibility(View.GONE);
 564		viewHolder.audioPlayer.setVisibility(View.GONE);
 565		viewHolder.download_button.setVisibility(View.VISIBLE);
 566		viewHolder.download_button.setText(R.string.show_location);
 567		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 568
 569			@Override
 570			public void onClick(View v) {
 571				showLocation(message);
 572			}
 573		});
 574	}
 575
 576	private void displayAudioMessage(ViewHolder viewHolder, Message message, boolean darkBackground) {
 577		viewHolder.image.setVisibility(View.GONE);
 578		viewHolder.messageBody.setVisibility(View.GONE);
 579		viewHolder.download_button.setVisibility(View.GONE);
 580		final RelativeLayout audioPlayer = viewHolder.audioPlayer;
 581		audioPlayer.setVisibility(View.VISIBLE);
 582		AudioPlayer.ViewHolder.get(audioPlayer).setDarkBackground(darkBackground);
 583		this.audioPlayer.init(audioPlayer, message);
 584	}
 585
 586
 587	private void displayImageMessage(ViewHolder viewHolder, final Message message) {
 588		viewHolder.download_button.setVisibility(View.GONE);
 589		viewHolder.messageBody.setVisibility(View.GONE);
 590		viewHolder.audioPlayer.setVisibility(View.GONE);
 591		viewHolder.image.setVisibility(View.VISIBLE);
 592		FileParams params = message.getFileParams();
 593		double target = metrics.density * 288;
 594		int scaledW;
 595		int scaledH;
 596		if (Math.max(params.height, params.width) * metrics.density <= target) {
 597			scaledW = (int) (params.width * metrics.density);
 598			scaledH = (int) (params.height * metrics.density);
 599		} else if (Math.max(params.height,params.width) <= target) {
 600			scaledW = params.width;
 601			scaledH = params.height;
 602		} else if (params.width <= params.height) {
 603			scaledW = (int) (params.width / ((double) params.height / target));
 604			scaledH = (int) target;
 605		} else {
 606			scaledW = (int) target;
 607			scaledH = (int) (params.height / ((double) params.width / target));
 608		}
 609		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(scaledW, scaledH);
 610		layoutParams.setMargins(0, (int) (metrics.density * 4), 0, (int) (metrics.density * 4));
 611		viewHolder.image.setLayoutParams(layoutParams);
 612		activity.loadBitmap(message, viewHolder.image);
 613		viewHolder.image.setOnClickListener(new OnClickListener() {
 614
 615			@Override
 616			public void onClick(View v) {
 617				openDownloadable(message);
 618			}
 619		});
 620	}
 621
 622	private void loadMoreMessages(Conversation conversation) {
 623		conversation.setLastClearHistory(0,null);
 624		activity.xmppConnectionService.updateConversation(conversation);
 625		conversation.setHasMessagesLeftOnServer(true);
 626		conversation.setFirstMamReference(null);
 627		long timestamp = conversation.getLastMessageTransmitted().getTimestamp();
 628		if (timestamp == 0) {
 629			timestamp = System.currentTimeMillis();
 630		}
 631		conversation.messagesLoaded.set(true);
 632		MessageArchiveService.Query query = activity.xmppConnectionService.getMessageArchiveService().query(conversation, new MamReference(0), timestamp, false);
 633		if (query != null) {
 634			Toast.makeText(activity, R.string.fetching_history_from_server, Toast.LENGTH_LONG).show();
 635		} else {
 636			Toast.makeText(activity,R.string.not_fetching_history_retention_period, Toast.LENGTH_SHORT).show();
 637		}
 638	}
 639
 640	@Override
 641	public View getView(int position, View view, ViewGroup parent) {
 642		final Message message = getItem(position);
 643		final boolean omemoEncryption = message.getEncryption() == Message.ENCRYPTION_AXOLOTL;
 644		final boolean isInValidSession = message.isValidInSession() && (!omemoEncryption || message.isTrusted());
 645		final Conversation conversation = message.getConversation();
 646		final Account account = conversation.getAccount();
 647		final int type = getItemViewType(position);
 648		ViewHolder viewHolder;
 649		if (view == null) {
 650			viewHolder = new ViewHolder();
 651			switch (type) {
 652				case DATE_SEPARATOR:
 653					view = activity.getLayoutInflater().inflate(R.layout.message_date_bubble, parent, false);
 654					viewHolder.status_message = view.findViewById(R.id.message_body);
 655					viewHolder.message_box = view.findViewById(R.id.message_box);
 656					break;
 657				case SENT:
 658					view = activity.getLayoutInflater().inflate(R.layout.message_sent, parent, false);
 659					viewHolder.message_box = view.findViewById(R.id.message_box);
 660					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 661					viewHolder.download_button = view.findViewById(R.id.download_button);
 662					viewHolder.indicator = view.findViewById(R.id.security_indicator);
 663					viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
 664					viewHolder.image = view.findViewById(R.id.message_image);
 665					viewHolder.messageBody = view.findViewById(R.id.message_body);
 666					viewHolder.time = view.findViewById(R.id.message_time);
 667					viewHolder.indicatorReceived = view.findViewById(R.id.indicator_received);
 668					viewHolder.audioPlayer = view.findViewById(R.id.audio_player);
 669					break;
 670				case RECEIVED:
 671					view = activity.getLayoutInflater().inflate(R.layout.message_received, parent, false);
 672					viewHolder.message_box = view.findViewById(R.id.message_box);
 673					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 674					viewHolder.download_button = view.findViewById(R.id.download_button);
 675					viewHolder.indicator = view.findViewById(R.id.security_indicator);
 676					viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
 677					viewHolder.image = view.findViewById(R.id.message_image);
 678					viewHolder.messageBody = view.findViewById(R.id.message_body);
 679					viewHolder.time = view.findViewById(R.id.message_time);
 680					viewHolder.indicatorReceived = view.findViewById(R.id.indicator_received);
 681					viewHolder.encryption = view.findViewById(R.id.message_encryption);
 682					viewHolder.audioPlayer = view.findViewById(R.id.audio_player);
 683					break;
 684				case STATUS:
 685					view = activity.getLayoutInflater().inflate(R.layout.message_status, parent, false);
 686					viewHolder.contact_picture = view.findViewById(R.id.message_photo);
 687					viewHolder.status_message = view.findViewById(R.id.status_message);
 688					viewHolder.load_more_messages = view.findViewById(R.id.load_more_messages);
 689					break;
 690				default:
 691					throw new AssertionError("Unknown view type");
 692			}
 693			if (viewHolder.messageBody != null) {
 694				listSelectionManager.onCreate(viewHolder.messageBody,
 695						new MessageBodyActionModeCallback(viewHolder.messageBody));
 696				viewHolder.messageBody.setCopyHandler(this);
 697			}
 698			view.setTag(viewHolder);
 699		} else {
 700			viewHolder = (ViewHolder) view.getTag();
 701			if (viewHolder == null) {
 702				return view;
 703			}
 704		}
 705
 706		boolean darkBackground = type == RECEIVED && (!isInValidSession || mUseGreenBackground) || activity.isDarkTheme();
 707
 708		if (type == DATE_SEPARATOR) {
 709			if (UIHelper.today(message.getTimeSent())) {
 710				viewHolder.status_message.setText(R.string.today);
 711			} else if (UIHelper.yesterday(message.getTimeSent())) {
 712				viewHolder.status_message.setText(R.string.yesterday);
 713			} else {
 714				viewHolder.status_message.setText(DateUtils.formatDateTime(activity,message.getTimeSent(),DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR));
 715			}
 716			viewHolder.message_box.setBackgroundResource(activity.isDarkTheme() ? R.drawable.date_bubble_grey : R.drawable.date_bubble_white);
 717			viewHolder.status_message.setTextColor(activity.getSecondaryTextColor());
 718			return view;
 719		} else if (type == STATUS) {
 720			if ("LOAD_MORE".equals(message.getBody())) {
 721				viewHolder.status_message.setVisibility(View.GONE);
 722				viewHolder.contact_picture.setVisibility(View.GONE);
 723				viewHolder.load_more_messages.setVisibility(View.VISIBLE);
 724				viewHolder.load_more_messages.setOnClickListener(new OnClickListener() {
 725					@Override
 726					public void onClick(View v) {
 727						loadMoreMessages(message.getConversation());
 728					}
 729				});
 730			} else {
 731				viewHolder.status_message.setVisibility(View.VISIBLE);
 732				viewHolder.load_more_messages.setVisibility(View.GONE);
 733				viewHolder.status_message.setText(message.getBody());
 734				boolean showAvatar;
 735				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 736					showAvatar = true;
 737					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 738				} else if (message.getCounterpart() != null || message.getTrueCounterpart() != null || (message.getCounterparts() != null && message.getCounterparts().size() > 0)) {
 739					showAvatar = true;
 740					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 741				} else {
 742					showAvatar = false;
 743				}
 744				if (showAvatar) {
 745					viewHolder.contact_picture.setAlpha(0.5f);
 746					viewHolder.contact_picture.setVisibility(View.VISIBLE);
 747				} else {
 748					viewHolder.contact_picture.setVisibility(View.GONE);
 749				}
 750			}
 751			return view;
 752		} else {
 753			loadAvatar(message, viewHolder.contact_picture,activity.getPixel(48));
 754		}
 755
 756		viewHolder.contact_picture
 757			.setOnClickListener(new OnClickListener() {
 758
 759				@Override
 760				public void onClick(View v) {
 761					if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
 762						MessageAdapter.this.mOnContactPictureClickedListener
 763								.onContactPictureClicked(message);
 764					}
 765
 766				}
 767			});
 768		viewHolder.contact_picture
 769			.setOnLongClickListener(new OnLongClickListener() {
 770
 771				@Override
 772				public boolean onLongClick(View v) {
 773					if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
 774						MessageAdapter.this.mOnContactPictureLongClickedListener
 775								.onContactPictureLongClicked(message);
 776						return true;
 777					} else {
 778						return false;
 779					}
 780				}
 781			});
 782
 783		final Transferable transferable = message.getTransferable();
 784		if (transferable != null && transferable.getStatus() != Transferable.STATUS_UPLOADING) {
 785			if (transferable.getStatus() == Transferable.STATUS_OFFER) {
 786				displayDownloadableMessage(viewHolder,message,activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, message)));
 787			} else if (transferable.getStatus() == Transferable.STATUS_OFFER_CHECK_FILESIZE) {
 788				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 789			} else {
 790				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first,darkBackground);
 791			}
 792		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 793			displayImageMessage(viewHolder, message);
 794		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 795			if (message.getFileParams().width > 0 && message.getFileParams().height > 0) {
 796				displayImageMessage(viewHolder, message);
 797			} else if (message.getFileParams().runtime > 0) {
 798				displayAudioMessage(viewHolder, message, darkBackground);
 799			} else {
 800				displayOpenableMessage(viewHolder, message);
 801			}
 802		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 803			if (account.isPgpDecryptionServiceConnected()) {
 804				if (!account.hasPendingPgpIntent(conversation)) {
 805					displayInfoMessage(viewHolder, activity.getString(R.string.message_decrypting), darkBackground);
 806				} else {
 807					displayInfoMessage(viewHolder, activity.getString(R.string.pgp_message), darkBackground);
 808				}
 809			} else {
 810				displayInfoMessage(viewHolder,activity.getString(R.string.install_openkeychain),darkBackground);
 811				viewHolder.message_box.setOnClickListener(new OnClickListener() {
 812
 813							@Override
 814							public void onClick(View v) {
 815								activity.showInstallPgpDialog();
 816							}
 817						});
 818			}
 819		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
 820			displayDecryptionFailed(viewHolder,darkBackground);
 821		} else {
 822			if (message.isGeoUri()) {
 823				displayLocationMessage(viewHolder,message);
 824			} else if (message.bodyIsOnlyEmojis() && message.getType() != Message.TYPE_PRIVATE) {
 825				displayEmojiMessage(viewHolder, message.getBody().trim());
 826			} else if (message.treatAsDownloadable()) {
 827				try {
 828					URL url = new URL(message.getBody());
 829					displayDownloadableMessage(viewHolder,
 830							message,
 831							activity.getString(R.string.check_x_filesize_on_host,
 832									UIHelper.getFileDescriptionString(activity, message),
 833									url.getHost()));
 834				} catch (Exception e) {
 835					displayDownloadableMessage(viewHolder,
 836							message,
 837							activity.getString(R.string.check_x_filesize,
 838									UIHelper.getFileDescriptionString(activity, message)));
 839				}
 840			} else {
 841				displayTextMessage(viewHolder, message, darkBackground, type);
 842			}
 843		}
 844
 845		if (type == RECEIVED) {
 846			if(isInValidSession) {
 847				int bubble;
 848				if (!mUseGreenBackground) {
 849					bubble = activity.getThemeResource(R.attr.message_bubble_received_monochrome, R.drawable.message_bubble_received_white);
 850				} else {
 851					bubble = activity.getThemeResource(R.attr.message_bubble_received_green, R.drawable.message_bubble_received);
 852				}
 853				viewHolder.message_box.setBackgroundResource(bubble);
 854				viewHolder.encryption.setVisibility(View.GONE);
 855			} else {
 856				viewHolder.message_box.setBackgroundResource(R.drawable.message_bubble_received_warning);
 857				viewHolder.encryption.setVisibility(View.VISIBLE);
 858				if (omemoEncryption && !message.isTrusted()) {
 859					viewHolder.encryption.setText(R.string.not_trusted);
 860				} else {
 861					viewHolder.encryption.setText(CryptoHelper.encryptionTypeToText(message.getEncryption()));
 862				}
 863			}
 864		}
 865
 866		displayStatus(viewHolder, message, type, darkBackground);
 867
 868		return view;
 869	}
 870
 871	@Override
 872	public void notifyDataSetChanged() {
 873		listSelectionManager.onBeforeNotifyDataSetChanged();
 874		super.notifyDataSetChanged();
 875		listSelectionManager.onAfterNotifyDataSetChanged();
 876	}
 877
 878	private String transformText(CharSequence text, int start, int end, boolean forCopy) {
 879		SpannableStringBuilder builder = new SpannableStringBuilder(text);
 880		Object copySpan = new Object();
 881		builder.setSpan(copySpan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 882		DividerSpan[] dividerSpans = builder.getSpans(0, builder.length(), DividerSpan.class);
 883		for (DividerSpan dividerSpan : dividerSpans) {
 884			builder.replace(builder.getSpanStart(dividerSpan), builder.getSpanEnd(dividerSpan),
 885					dividerSpan.isLarge() ? "\n\n" : "\n");
 886		}
 887		start = builder.getSpanStart(copySpan);
 888		end = builder.getSpanEnd(copySpan);
 889		if (start == -1 || end == -1) return "";
 890		builder = new SpannableStringBuilder(builder, start, end);
 891		if (forCopy) {
 892			QuoteSpan[] quoteSpans = builder.getSpans(0, builder.length(), QuoteSpan.class);
 893			for (QuoteSpan quoteSpan : quoteSpans) {
 894				builder.insert(builder.getSpanStart(quoteSpan), "> ");
 895			}
 896		}
 897		return builder.toString();
 898	}
 899
 900	@Override
 901	public String transformTextForCopy(CharSequence text, int start, int end) {
 902		if (text instanceof Spanned) {
 903			return transformText(text, start, end, true);
 904		} else {
 905			return text.toString().substring(start, end);
 906		}
 907	}
 908
 909	public FileBackend getFileBackend() {
 910		return activity.xmppConnectionService.getFileBackend();
 911	}
 912
 913	public void stopAudioPlayer() {
 914		audioPlayer.stop();
 915	}
 916
 917	public interface OnQuoteListener {
 918		public void onQuote(String text);
 919	}
 920
 921	private class MessageBodyActionModeCallback implements ActionMode.Callback {
 922
 923		private final TextView textView;
 924
 925		public MessageBodyActionModeCallback(TextView textView) {
 926			this.textView = textView;
 927		}
 928
 929		@Override
 930		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 931			if (onQuoteListener != null) {
 932				int quoteResId = activity.getThemeResource(R.attr.icon_quote, R.drawable.ic_action_reply);
 933				// 3rd item is placed after "copy" item
 934				menu.add(0, android.R.id.button1, 3, R.string.quote).setIcon(quoteResId)
 935						.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
 936			}
 937			return false;
 938		}
 939
 940		@Override
 941		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 942			return false;
 943		}
 944
 945		@Override
 946		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 947			if (item.getItemId() == android.R.id.button1) {
 948				int start = textView.getSelectionStart();
 949				int end = textView.getSelectionEnd();
 950				if (end > start) {
 951					String text = transformText(textView.getText(), start, end, false);
 952					if (onQuoteListener != null) {
 953						onQuoteListener.onQuote(text);
 954					}
 955					mode.finish();
 956				}
 957				return true;
 958			}
 959			return false;
 960		}
 961
 962		@Override
 963		public void onDestroyActionMode(ActionMode mode) {}
 964	}
 965
 966	public void openDownloadable(Message message) {
 967		DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 968		if (!file.exists()) {
 969			Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
 970			return;
 971		}
 972		Intent openIntent = new Intent(Intent.ACTION_VIEW);
 973		String mime = file.getMimeType();
 974		if (mime == null) {
 975			mime = "*/*";
 976		}
 977		Uri uri;
 978		try {
 979			uri = FileBackend.getUriForFile(activity, file);
 980		} catch (SecurityException e) {
 981			Log.d(Config.LOGTAG,"No permission to access "+file.getAbsolutePath(),e);
 982			Toast.makeText(activity, activity.getString(R.string.no_permission_to_access_x, file.getAbsolutePath()), Toast.LENGTH_SHORT).show();
 983			return;
 984		}
 985		openIntent.setDataAndType(uri, mime);
 986		openIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 987		PackageManager manager = activity.getPackageManager();
 988		List<ResolveInfo> info = manager.queryIntentActivities(openIntent, 0);
 989		if (info.size() == 0) {
 990			openIntent.setDataAndType(uri,"*/*");
 991		}
 992		try {
 993			getContext().startActivity(openIntent);
 994		}  catch (ActivityNotFoundException e) {
 995			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
 996		}
 997	}
 998
 999	public void showLocation(Message message) {
1000		for(Intent intent : GeoHelper.createGeoIntentsFromMessage(message)) {
1001			if (intent.resolveActivity(getContext().getPackageManager()) != null) {
1002				getContext().startActivity(intent);
1003				return;
1004			}
1005		}
1006		Toast.makeText(activity,R.string.no_application_found_to_display_location,Toast.LENGTH_SHORT).show();
1007	}
1008
1009	public void updatePreferences() {
1010		SharedPreferences p = PreferenceManager.getDefaultSharedPreferences(activity);
1011		this.mIndicateReceived = p.getBoolean("indicate_received", activity.getResources().getBoolean(R.bool.indicate_received));
1012		this.mUseGreenBackground = p.getBoolean("use_green_background", activity.getResources().getBoolean(R.bool.use_green_background));
1013	}
1014
1015	public TextView getMessageBody(View view) {
1016		final Object tag = view.getTag();
1017		if (tag instanceof ViewHolder) {
1018			final ViewHolder viewHolder = (ViewHolder) tag;
1019			return viewHolder.messageBody;
1020		}
1021		return null;
1022	}
1023
1024	public interface OnContactPictureClicked {
1025		void onContactPictureClicked(Message message);
1026	}
1027
1028	public interface OnContactPictureLongClicked {
1029		void onContactPictureLongClicked(Message message);
1030	}
1031
1032	private static class ViewHolder {
1033
1034		protected LinearLayout message_box;
1035		protected Button download_button;
1036		protected ImageView image;
1037		protected ImageView indicator;
1038		protected ImageView indicatorReceived;
1039		protected TextView time;
1040		protected CopyTextView messageBody;
1041		protected ImageView contact_picture;
1042		protected TextView status_message;
1043		protected TextView encryption;
1044		public Button load_more_messages;
1045		public ImageView edit_indicator;
1046		public RelativeLayout audioPlayer;
1047	}
1048
1049	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
1050		private final WeakReference<ImageView> imageViewReference;
1051		private Message message = null;
1052		private final int size;
1053
1054		public BitmapWorkerTask(ImageView imageView, int size) {
1055			imageViewReference = new WeakReference<>(imageView);
1056			this.size = size;
1057		}
1058
1059		@Override
1060		protected Bitmap doInBackground(Message... params) {
1061			this.message = params[0];
1062			return activity.avatarService().get(this.message, size, isCancelled());
1063		}
1064
1065		@Override
1066		protected void onPostExecute(Bitmap bitmap) {
1067			if (bitmap != null && !isCancelled()) {
1068				final ImageView imageView = imageViewReference.get();
1069				if (imageView != null) {
1070					imageView.setImageBitmap(bitmap);
1071					imageView.setBackgroundColor(0x00000000);
1072				}
1073			}
1074		}
1075	}
1076
1077	public void loadAvatar(Message message, ImageView imageView, int size) {
1078		if (cancelPotentialWork(message, imageView)) {
1079			final Bitmap bm = activity.avatarService().get(message, size, true);
1080			if (bm != null) {
1081				cancelPotentialWork(message, imageView);
1082				imageView.setImageBitmap(bm);
1083				imageView.setBackgroundColor(Color.TRANSPARENT);
1084			} else {
1085				@ColorInt int bg;
1086				if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
1087					bg = Color.TRANSPARENT;
1088				} else {
1089					bg = UIHelper.getColorForName(UIHelper.getMessageDisplayName(message));
1090				}
1091				imageView.setBackgroundColor(bg);
1092				imageView.setImageDrawable(null);
1093				final BitmapWorkerTask task = new BitmapWorkerTask(imageView, size);
1094				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
1095				imageView.setImageDrawable(asyncDrawable);
1096				try {
1097					task.execute(message);
1098				} catch (final RejectedExecutionException ignored) {
1099				}
1100			}
1101		}
1102	}
1103
1104	public static boolean cancelPotentialWork(Message message, ImageView imageView) {
1105		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
1106
1107		if (bitmapWorkerTask != null) {
1108			final Message oldMessage = bitmapWorkerTask.message;
1109			if (oldMessage == null || message != oldMessage) {
1110				bitmapWorkerTask.cancel(true);
1111			} else {
1112				return false;
1113			}
1114		}
1115		return true;
1116	}
1117
1118	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
1119		if (imageView != null) {
1120			final Drawable drawable = imageView.getDrawable();
1121			if (drawable instanceof AsyncDrawable) {
1122				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
1123				return asyncDrawable.getBitmapWorkerTask();
1124			}
1125		}
1126		return null;
1127	}
1128
1129	static class AsyncDrawable extends BitmapDrawable {
1130		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
1131
1132		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
1133			super(res, bitmap);
1134			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
1135		}
1136
1137		public BitmapWorkerTask getBitmapWorkerTask() {
1138			return bitmapWorkerTaskReference.get();
1139		}
1140	}
1141}