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