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