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 java.lang.ref.WeakReference;
  40import java.net.URL;
  41import java.util.List;
  42import java.util.Locale;
  43import java.util.concurrent.RejectedExecutionException;
  44import java.util.regex.Matcher;
  45import java.util.regex.Pattern;
  46
  47import eu.siacs.conversations.Config;
  48import eu.siacs.conversations.R;
  49import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
  50import eu.siacs.conversations.entities.Account;
  51import eu.siacs.conversations.entities.Conversation;
  52import eu.siacs.conversations.entities.DownloadableFile;
  53import eu.siacs.conversations.entities.Message;
  54import eu.siacs.conversations.entities.Message.FileParams;
  55import eu.siacs.conversations.entities.Transferable;
  56import eu.siacs.conversations.persistance.FileBackend;
  57import eu.siacs.conversations.services.MessageArchiveService;
  58import eu.siacs.conversations.services.NotificationService;
  59import eu.siacs.conversations.ui.ConversationActivity;
  60import eu.siacs.conversations.ui.text.DividerSpan;
  61import eu.siacs.conversations.ui.text.QuoteSpan;
  62import eu.siacs.conversations.ui.widget.ClickableMovementMethod;
  63import eu.siacs.conversations.ui.widget.CopyTextView;
  64import eu.siacs.conversations.ui.widget.ListSelectionManager;
  65import eu.siacs.conversations.utils.CryptoHelper;
  66import eu.siacs.conversations.utils.GeoHelper;
  67import eu.siacs.conversations.utils.Patterns;
  68import eu.siacs.conversations.utils.UIHelper;
  69import eu.siacs.conversations.xmpp.mam.MamReference;
  70
  71public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextView.CopyHandler {
  72
  73	private static final int SENT = 0;
  74	private static final int RECEIVED = 1;
  75	private static final int STATUS = 2;
  76	private static final int DATE_SEPARATOR = 3;
  77
  78	public static final String DATE_SEPARATOR_BODY = "DATE_SEPARATOR";
  79
  80	private static final Pattern XMPP_PATTERN = Pattern
  81			.compile("xmpp\\:(?:(?:["
  82					+ Patterns.GOOD_IRI_CHAR
  83					+ "\\;\\/\\?\\@\\&\\=\\#\\~\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])"
  84					+ "|(?:\\%[a-fA-F0-9]{2}))+");
  85
  86	private static final Linkify.TransformFilter WEBURL_TRANSFORM_FILTER = new Linkify.TransformFilter() {
  87		@Override
  88		public String transformUrl(Matcher matcher, String url) {
  89			if (url == null) {
  90				return null;
  91			}
  92			final String lcUrl = url.toLowerCase(Locale.US);
  93			if (lcUrl.startsWith("http://") || lcUrl.startsWith("https://")) {
  94				return url;
  95			} else {
  96				return "http://"+url;
  97			}
  98		}
  99	};
 100	private static final Linkify.MatchFilter WEBURL_MATCH_FILTER = new Linkify.MatchFilter() {
 101		@Override
 102		public boolean acceptMatch(CharSequence cs, int start, int end) {
 103			return start < 1 || (cs.charAt(start-1) != '@' && cs.charAt(start-1) != '.' && !cs.subSequence(Math.max(0,start - 3),start).equals("://"));
 104		}
 105	};
 106
 107	private ConversationActivity activity;
 108
 109	private DisplayMetrics metrics;
 110
 111	private OnContactPictureClicked mOnContactPictureClickedListener;
 112	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;
 113
 114	private boolean mIndicateReceived = false;
 115	private boolean mUseGreenBackground = false;
 116
 117	private OnQuoteListener onQuoteListener;
 118
 119	private final ListSelectionManager listSelectionManager = new ListSelectionManager();
 120
 121	public MessageAdapter(ConversationActivity activity, List<Message> messages) {
 122		super(activity, 0, messages);
 123		this.activity = activity;
 124		metrics = getContext().getResources().getDisplayMetrics();
 125		updatePreferences();
 126	}
 127
 128	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
 129		this.mOnContactPictureClickedListener = listener;
 130	}
 131
 132	public void setOnContactPictureLongClicked(
 133			OnContactPictureLongClicked listener) {
 134		this.mOnContactPictureLongClickedListener = listener;
 135			}
 136
 137	public void setOnQuoteListener(OnQuoteListener listener) {
 138		this.onQuoteListener = listener;
 139	}
 140
 141	@Override
 142	public int getViewTypeCount() {
 143		return 4;
 144	}
 145
 146	public int getItemViewType(Message message) {
 147		if (message.getType() == Message.TYPE_STATUS) {
 148			if (DATE_SEPARATOR_BODY.equals(message.getBody())) {
 149				return DATE_SEPARATOR;
 150			} else {
 151				return STATUS;
 152			}
 153		} else if (message.getStatus() <= Message.STATUS_RECEIVED) {
 154			return RECEIVED;
 155		}
 156
 157		return SENT;
 158	}
 159
 160	@Override
 161	public int getItemViewType(int position) {
 162		return this.getItemViewType(getItem(position));
 163	}
 164
 165	private int getMessageTextColor(boolean onDark, boolean primary) {
 166		if (onDark) {
 167			return ContextCompat.getColor(activity, primary ? R.color.white : R.color.white70);
 168		} else {
 169			return ContextCompat.getColor(activity, primary ? R.color.black87 : R.color.black54);
 170		}
 171	}
 172
 173	private void displayStatus(ViewHolder viewHolder, Message message, int type, boolean darkBackground) {
 174		String filesize = null;
 175		String info = null;
 176		boolean error = false;
 177		if (viewHolder.indicatorReceived != null) {
 178			viewHolder.indicatorReceived.setVisibility(View.GONE);
 179		}
 180
 181		if (viewHolder.edit_indicator != null) {
 182			if (message.edited()) {
 183				viewHolder.edit_indicator.setVisibility(View.VISIBLE);
 184				viewHolder.edit_indicator.setImageResource(darkBackground ? R.drawable.ic_mode_edit_white_18dp : R.drawable.ic_mode_edit_black_18dp);
 185				viewHolder.edit_indicator.setAlpha(darkBackground ? 0.7f : 0.57f);
 186			} else {
 187				viewHolder.edit_indicator.setVisibility(View.GONE);
 188			}
 189		}
 190		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 191			&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
 192		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getTransferable() != null) {
 193			FileParams params = message.getFileParams();
 194			if (params.size > (1.5 * 1024 * 1024)) {
 195				filesize = params.size / (1024 * 1024)+ " MiB";
 196			} else if (params.size >= 1024) {
 197				filesize = params.size / 1024 + " KiB";
 198			} else if (params.size > 0){
 199				filesize = params.size + " B";
 200			}
 201			if (message.getTransferable() != null && message.getTransferable().getStatus() == Transferable.STATUS_FAILED) {
 202				error = true;
 203			}
 204		}
 205		switch (message.getMergedStatus()) {
 206			case Message.STATUS_WAITING:
 207				info = getContext().getString(R.string.waiting);
 208				break;
 209			case Message.STATUS_UNSEND:
 210				Transferable d = message.getTransferable();
 211				if (d!=null) {
 212					info = getContext().getString(R.string.sending_file,d.getProgress());
 213				} else {
 214					info = getContext().getString(R.string.sending);
 215				}
 216				break;
 217			case Message.STATUS_OFFERED:
 218				info = getContext().getString(R.string.offering);
 219				break;
 220			case Message.STATUS_SEND_RECEIVED:
 221				if (mIndicateReceived) {
 222					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 223				}
 224				break;
 225			case Message.STATUS_SEND_DISPLAYED:
 226				if (mIndicateReceived) {
 227					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 228				}
 229				break;
 230			case Message.STATUS_SEND_FAILED:
 231				info = getContext().getString(R.string.send_failed);
 232				error = true;
 233				break;
 234			default:
 235				if (multiReceived) {
 236					info = UIHelper.getMessageDisplayName(message);
 237				}
 238				break;
 239		}
 240		if (error && type == SENT) {
 241			viewHolder.time.setTextColor(activity.getWarningTextColor());
 242		} else {
 243			viewHolder.time.setTextColor(this.getMessageTextColor(darkBackground,false));
 244		}
 245		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 246			viewHolder.indicator.setVisibility(View.GONE);
 247		} else {
 248			boolean verified = false;
 249			if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
 250				final FingerprintStatus status = message.getConversation()
 251						.getAccount().getAxolotlService().getFingerprintTrust(
 252								message.getFingerprint());
 253				if (status != null && status.isVerified()) {
 254					verified = true;
 255				}
 256			}
 257			if (verified) {
 258				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_verified_user_white_18dp : R.drawable.ic_verified_user_black_18dp);
 259			} else {
 260				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
 261			}
 262			if (darkBackground) {
 263				viewHolder.indicator.setAlpha(0.7f);
 264			} else {
 265				viewHolder.indicator.setAlpha(0.57f);
 266			}
 267			viewHolder.indicator.setVisibility(View.VISIBLE);
 268		}
 269
 270		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(),
 271				message.getMergedTimeSent());
 272		if (message.getStatus() <= Message.STATUS_RECEIVED) {
 273			if ((filesize != null) && (info != null)) {
 274				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize +" \u00B7 " + info);
 275			} else if ((filesize == null) && (info != null)) {
 276				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
 277			} else if ((filesize != null) && (info == null)) {
 278				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize);
 279			} else {
 280				viewHolder.time.setText(formatedTime);
 281			}
 282		} else {
 283			if ((filesize != null) && (info != null)) {
 284				viewHolder.time.setText(filesize + " \u00B7 " + info);
 285			} else if ((filesize == null) && (info != null)) {
 286				if (error) {
 287					viewHolder.time.setText(info + " \u00B7 " + formatedTime);
 288				} else {
 289					viewHolder.time.setText(info);
 290				}
 291			} else if ((filesize != null) && (info == null)) {
 292				viewHolder.time.setText(filesize + " \u00B7 " + formatedTime);
 293			} else {
 294				viewHolder.time.setText(formatedTime);
 295			}
 296		}
 297	}
 298
 299	private void displayInfoMessage(ViewHolder viewHolder, String text, boolean darkBackground) {
 300		if (viewHolder.download_button != null) {
 301			viewHolder.download_button.setVisibility(View.GONE);
 302		}
 303		viewHolder.image.setVisibility(View.GONE);
 304		viewHolder.messageBody.setVisibility(View.VISIBLE);
 305		viewHolder.messageBody.setText(text);
 306		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 307		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
 308		viewHolder.messageBody.setTextIsSelectable(false);
 309	}
 310
 311	private void displayDecryptionFailed(ViewHolder viewHolder, boolean darkBackground) {
 312		if (viewHolder.download_button != null) {
 313			viewHolder.download_button.setVisibility(View.GONE);
 314		}
 315		viewHolder.image.setVisibility(View.GONE);
 316		viewHolder.messageBody.setVisibility(View.VISIBLE);
 317		viewHolder.messageBody.setText(getContext().getString(
 318				R.string.decryption_failed));
 319		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 320		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 321		viewHolder.messageBody.setTextIsSelectable(false);
 322	}
 323
 324	private void displayHeartMessage(final ViewHolder viewHolder, final String body) {
 325		if (viewHolder.download_button != null) {
 326			viewHolder.download_button.setVisibility(View.GONE);
 327		}
 328		viewHolder.image.setVisibility(View.GONE);
 329		viewHolder.messageBody.setVisibility(View.VISIBLE);
 330		viewHolder.messageBody.setIncludeFontPadding(false);
 331		Spannable span = new SpannableString(body);
 332		span.setSpan(new RelativeSizeSpan(4.0f), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 333		span.setSpan(new ForegroundColorSpan(activity.getWarningTextColor()), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 334		viewHolder.messageBody.setText(span);
 335	}
 336
 337	private int applyQuoteSpan(SpannableStringBuilder body, int start, int end, boolean darkBackground) {
 338		if (start > 1 && !"\n\n".equals(body.subSequence(start - 2, start).toString())) {
 339			body.insert(start++, "\n");
 340			body.setSpan(new DividerSpan(false), start - 2, start, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 341			end++;
 342		}
 343		if (end < body.length() - 1 && !"\n\n".equals(body.subSequence(end, end + 2).toString())) {
 344			body.insert(end, "\n");
 345			body.setSpan(new DividerSpan(false), end, end + 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 346		}
 347		int color = darkBackground ? this.getMessageTextColor(darkBackground, false)
 348				: ContextCompat.getColor(activity, R.color.bubble);
 349		DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
 350		body.setSpan(new QuoteSpan(color, metrics), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 351		return 0;
 352	}
 353
 354	/**
 355	 * Applies QuoteSpan to group of lines which starts with > or » characters.
 356	 * Appends likebreaks and applies DividerSpan to them to show a padding between quote and text.
 357	 */
 358	private boolean handleTextQuotes(SpannableStringBuilder body, boolean darkBackground) {
 359		boolean startsWithQuote = false;
 360		char previous = '\n';
 361		int lineStart = -1;
 362		int lineTextStart = -1;
 363		int quoteStart = -1;
 364		for (int i = 0; i <= body.length(); i++) {
 365			char current = body.length() > i ? body.charAt(i) : '\n';
 366			if (lineStart == -1) {
 367				if (previous == '\n') {
 368					if ((current == '>' && UIHelper.isPositionFollowedByQuoteableCharacter(body,i))
 369							|| current == '\u00bb' && !UIHelper.isPositionFollowedByQuote(body,i)) {
 370						// Line start with quote
 371						lineStart = i;
 372						if (quoteStart == -1) quoteStart = i;
 373						if (i == 0) startsWithQuote = true;
 374					} else if (quoteStart >= 0) {
 375						// Line start without quote, apply spans there
 376						applyQuoteSpan(body, quoteStart, i - 1, darkBackground);
 377						quoteStart = -1;
 378					}
 379				}
 380			} else {
 381				// Remove extra spaces between > and first character in the line
 382				// > character will be removed too
 383				if (current != ' ' && lineTextStart == -1) {
 384					lineTextStart = i;
 385				}
 386				if (current == '\n') {
 387					body.delete(lineStart, lineTextStart);
 388					i -= lineTextStart - lineStart;
 389					if (i == lineStart) {
 390						// Avoid empty lines because span over empty line can be hidden
 391						body.insert(i++, " ");
 392					}
 393					lineStart = -1;
 394					lineTextStart = -1;
 395				}
 396			}
 397			previous = current;
 398		}
 399		if (quoteStart >= 0) {
 400			// Apply spans to finishing open quote
 401			applyQuoteSpan(body, quoteStart, body.length(), darkBackground);
 402		}
 403		return startsWithQuote;
 404	}
 405
 406	private void displayTextMessage(final ViewHolder viewHolder, final Message message, boolean darkBackground, int type) {
 407		if (viewHolder.download_button != null) {
 408			viewHolder.download_button.setVisibility(View.GONE);
 409		}
 410		viewHolder.image.setVisibility(View.GONE);
 411		viewHolder.messageBody.setVisibility(View.VISIBLE);
 412		viewHolder.messageBody.setIncludeFontPadding(true);
 413		if (message.getBody() != null) {
 414			final String nick = UIHelper.getMessageDisplayName(message);
 415			SpannableStringBuilder body = message.getMergedBody();
 416			boolean hasMeCommand = message.hasMeCommand();
 417			if (hasMeCommand) {
 418				body = body.replace(0, Message.ME_COMMAND.length(), nick + " ");
 419			}
 420			if (body.length() > Config.MAX_DISPLAY_MESSAGE_CHARS) {
 421				body = new SpannableStringBuilder(body, 0, Config.MAX_DISPLAY_MESSAGE_CHARS);
 422				body.append("\u2026");
 423			}
 424			Message.MergeSeparator[] mergeSeparators = body.getSpans(0, body.length(), Message.MergeSeparator.class);
 425			for (Message.MergeSeparator mergeSeparator : mergeSeparators) {
 426				int start = body.getSpanStart(mergeSeparator);
 427				int end = body.getSpanEnd(mergeSeparator);
 428				body.setSpan(new DividerSpan(true), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 429			}
 430			boolean startsWithQuote = handleTextQuotes(body, darkBackground);
 431			if (message.getType() != Message.TYPE_PRIVATE) {
 432				if (hasMeCommand) {
 433					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 0, nick.length(),
 434							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 435				}
 436			} else {
 437				String privateMarker;
 438				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 439					privateMarker = activity.getString(R.string.private_message);
 440				} else {
 441					final String to;
 442					if (message.getCounterpart() != null) {
 443						to = message.getCounterpart().getResourcepart();
 444					} else {
 445						to = "";
 446					}
 447					privateMarker = activity.getString(R.string.private_message_to, to);
 448				}
 449				body.insert(0, privateMarker);
 450				int privateMarkerIndex = privateMarker.length();
 451				if (startsWithQuote) {
 452					body.insert(privateMarkerIndex, "\n\n");
 453					body.setSpan(new DividerSpan(false), privateMarkerIndex, privateMarkerIndex + 2,
 454							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 455				} else {
 456					body.insert(privateMarkerIndex, " ");
 457				}
 458				body.setSpan(new ForegroundColorSpan(getMessageTextColor(darkBackground, false)),
 459						0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 460				body.setSpan(new StyleSpan(Typeface.BOLD),
 461						0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 462				if (hasMeCommand) {
 463					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), privateMarkerIndex + 1,
 464							privateMarkerIndex + 1 + nick.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 465				}
 466			}
 467			if (message.getConversation().getMode() == Conversation.MODE_MULTI && message.getStatus() == Message.STATUS_RECEIVED) {
 468				Pattern pattern = NotificationService.generateNickHighlightPattern(message.getConversation().getMucOptions().getActualNick());
 469				Matcher matcher = pattern.matcher(body);
 470				while(matcher.find()) {
 471					body.setSpan(new StyleSpan(Typeface.BOLD), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 472				}
 473			}
 474			Linkify.addLinks(body, XMPP_PATTERN, "xmpp");
 475			Linkify.addLinks(body, Patterns.AUTOLINK_WEB_URL, "http", WEBURL_MATCH_FILTER, WEBURL_TRANSFORM_FILTER);
 476			Linkify.addLinks(body, GeoHelper.GEO_URI, "geo");
 477			viewHolder.messageBody.setAutoLinkMask(0);
 478			viewHolder.messageBody.setText(body);
 479			viewHolder.messageBody.setTextIsSelectable(true);
 480			viewHolder.messageBody.setMovementMethod(ClickableMovementMethod.getInstance());
 481			listSelectionManager.onUpdate(viewHolder.messageBody, message);
 482		} else {
 483			viewHolder.messageBody.setText("");
 484			viewHolder.messageBody.setTextIsSelectable(false);
 485		}
 486		viewHolder.messageBody.setTextColor(this.getMessageTextColor(darkBackground, true));
 487		viewHolder.messageBody.setLinkTextColor(this.getMessageTextColor(darkBackground, true));
 488		viewHolder.messageBody.setHighlightColor(ContextCompat.getColor(activity, darkBackground
 489				? (type == SENT || !mUseGreenBackground ? R.color.black26 : R.color.grey800) : R.color.grey500));
 490		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 491	}
 492
 493	private void displayDownloadableMessage(ViewHolder viewHolder,
 494			final Message message, String text) {
 495		viewHolder.image.setVisibility(View.GONE);
 496		viewHolder.messageBody.setVisibility(View.GONE);
 497		viewHolder.download_button.setVisibility(View.VISIBLE);
 498		viewHolder.download_button.setText(text);
 499		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 500
 501			@Override
 502			public void onClick(View v) {
 503				activity.startDownloadable(message);
 504			}
 505		});
 506	}
 507
 508	private void displayOpenableMessage(ViewHolder viewHolder,final Message message) {
 509		viewHolder.image.setVisibility(View.GONE);
 510		viewHolder.messageBody.setVisibility(View.GONE);
 511		viewHolder.download_button.setVisibility(View.VISIBLE);
 512		viewHolder.download_button.setText(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity, message)));
 513		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 514
 515			@Override
 516			public void onClick(View v) {
 517				openDownloadable(message);
 518			}
 519		});
 520	}
 521
 522	private void displayLocationMessage(ViewHolder viewHolder, final Message message) {
 523		viewHolder.image.setVisibility(View.GONE);
 524		viewHolder.messageBody.setVisibility(View.GONE);
 525		viewHolder.download_button.setVisibility(View.VISIBLE);
 526		viewHolder.download_button.setText(R.string.show_location);
 527		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 528
 529			@Override
 530			public void onClick(View v) {
 531				showLocation(message);
 532			}
 533		});
 534	}
 535
 536	private void displayImageMessage(ViewHolder viewHolder,
 537			final Message message) {
 538		if (viewHolder.download_button != null) {
 539			viewHolder.download_button.setVisibility(View.GONE);
 540		}
 541		viewHolder.messageBody.setVisibility(View.GONE);
 542		viewHolder.image.setVisibility(View.VISIBLE);
 543		FileParams params = message.getFileParams();
 544		double target = metrics.density * 288;
 545		int scaledW;
 546		int scaledH;
 547		if (Math.max(params.height, params.width) * metrics.density <= target) {
 548			scaledW = (int) (params.width * metrics.density);
 549			scaledH = (int) (params.height * metrics.density);
 550		} else if (Math.max(params.height,params.width) <= target) {
 551			scaledW = params.width;
 552			scaledH = params.height;
 553		} else if (params.width <= params.height) {
 554			scaledW = (int) (params.width / ((double) params.height / target));
 555			scaledH = (int) target;
 556		} else {
 557			scaledW = (int) target;
 558			scaledH = (int) (params.height / ((double) params.width / target));
 559		}
 560		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(scaledW, scaledH);
 561		layoutParams.setMargins(0, (int) (metrics.density * 4), 0, (int) (metrics.density * 4));
 562		viewHolder.image.setLayoutParams(layoutParams);
 563		activity.loadBitmap(message, viewHolder.image);
 564		viewHolder.image.setOnClickListener(new OnClickListener() {
 565
 566			@Override
 567			public void onClick(View v) {
 568				openDownloadable(message);
 569			}
 570		});
 571	}
 572
 573	private void loadMoreMessages(Conversation conversation) {
 574		conversation.setLastClearHistory(0,null);
 575		activity.xmppConnectionService.updateConversation(conversation);
 576		conversation.setHasMessagesLeftOnServer(true);
 577		conversation.setFirstMamReference(null);
 578		long timestamp = conversation.getLastMessageTransmitted().getTimestamp();
 579		if (timestamp == 0) {
 580			timestamp = System.currentTimeMillis();
 581		}
 582		conversation.messagesLoaded.set(true);
 583		MessageArchiveService.Query query = activity.xmppConnectionService.getMessageArchiveService().query(conversation, new MamReference(0), timestamp, false);
 584		if (query != null) {
 585			Toast.makeText(activity, R.string.fetching_history_from_server, Toast.LENGTH_LONG).show();
 586		} else {
 587			Toast.makeText(activity,R.string.not_fetching_history_retention_period, Toast.LENGTH_SHORT).show();
 588		}
 589	}
 590
 591	@Override
 592	public View getView(int position, View view, ViewGroup parent) {
 593		final Message message = getItem(position);
 594		final boolean omemoEncryption = message.getEncryption() == Message.ENCRYPTION_AXOLOTL;
 595		final boolean isInValidSession = message.isValidInSession() && (!omemoEncryption || message.isTrusted());
 596		final Conversation conversation = message.getConversation();
 597		final Account account = conversation.getAccount();
 598		final int type = getItemViewType(position);
 599		ViewHolder viewHolder;
 600		if (view == null) {
 601			viewHolder = new ViewHolder();
 602			switch (type) {
 603				case DATE_SEPARATOR:
 604					view = activity.getLayoutInflater().inflate(R.layout.message_date_bubble, parent, false);
 605					viewHolder.status_message = (TextView) view.findViewById(R.id.message_body);
 606					viewHolder.message_box = (LinearLayout) view.findViewById(R.id.message_box);
 607					break;
 608				case SENT:
 609					view = activity.getLayoutInflater().inflate(
 610							R.layout.message_sent, parent, false);
 611					viewHolder.message_box = (LinearLayout) view
 612						.findViewById(R.id.message_box);
 613					viewHolder.contact_picture = (ImageView) view
 614						.findViewById(R.id.message_photo);
 615					viewHolder.download_button = (Button) view
 616						.findViewById(R.id.download_button);
 617					viewHolder.indicator = (ImageView) view
 618						.findViewById(R.id.security_indicator);
 619					viewHolder.edit_indicator = (ImageView) view.findViewById(R.id.edit_indicator);
 620					viewHolder.image = (ImageView) view
 621						.findViewById(R.id.message_image);
 622					viewHolder.messageBody = (CopyTextView) view
 623						.findViewById(R.id.message_body);
 624					viewHolder.time = (TextView) view
 625						.findViewById(R.id.message_time);
 626					viewHolder.indicatorReceived = (ImageView) view
 627						.findViewById(R.id.indicator_received);
 628					break;
 629				case RECEIVED:
 630					view = activity.getLayoutInflater().inflate(
 631							R.layout.message_received, parent, false);
 632					viewHolder.message_box = (LinearLayout) view
 633						.findViewById(R.id.message_box);
 634					viewHolder.contact_picture = (ImageView) view
 635						.findViewById(R.id.message_photo);
 636					viewHolder.download_button = (Button) view
 637						.findViewById(R.id.download_button);
 638					viewHolder.indicator = (ImageView) view
 639						.findViewById(R.id.security_indicator);
 640					viewHolder.edit_indicator = (ImageView) view.findViewById(R.id.edit_indicator);
 641					viewHolder.image = (ImageView) view
 642						.findViewById(R.id.message_image);
 643					viewHolder.messageBody = (CopyTextView) view
 644						.findViewById(R.id.message_body);
 645					viewHolder.time = (TextView) view
 646						.findViewById(R.id.message_time);
 647					viewHolder.indicatorReceived = (ImageView) view
 648						.findViewById(R.id.indicator_received);
 649					viewHolder.encryption = (TextView) view.findViewById(R.id.message_encryption);
 650					break;
 651				case STATUS:
 652					view = activity.getLayoutInflater().inflate(R.layout.message_status, parent, false);
 653					viewHolder.contact_picture = (ImageView) view.findViewById(R.id.message_photo);
 654					viewHolder.status_message = (TextView) view.findViewById(R.id.status_message);
 655					viewHolder.load_more_messages = (Button) view.findViewById(R.id.load_more_messages);
 656					break;
 657				default:
 658					viewHolder = null;
 659					break;
 660			}
 661			if (viewHolder.messageBody != null) {
 662				listSelectionManager.onCreate(viewHolder.messageBody,
 663						new MessageBodyActionModeCallback(viewHolder.messageBody));
 664				viewHolder.messageBody.setCopyHandler(this);
 665			}
 666			view.setTag(viewHolder);
 667		} else {
 668			viewHolder = (ViewHolder) view.getTag();
 669			if (viewHolder == null) {
 670				return view;
 671			}
 672		}
 673
 674		boolean darkBackground = type == RECEIVED && (!isInValidSession || mUseGreenBackground) || activity.isDarkTheme();
 675
 676		if (type == DATE_SEPARATOR) {
 677			if (UIHelper.today(message.getTimeSent())) {
 678				viewHolder.status_message.setText(R.string.today);
 679			} else if (UIHelper.yesterday(message.getTimeSent())) {
 680				viewHolder.status_message.setText(R.string.yesterday);
 681			} else {
 682				viewHolder.status_message.setText(DateUtils.formatDateTime(activity,message.getTimeSent(),DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR));
 683			}
 684			viewHolder.message_box.setBackgroundResource(activity.isDarkTheme() ? R.drawable.date_bubble_grey : R.drawable.date_bubble_white);
 685			viewHolder.status_message.setTextColor(activity.getSecondaryTextColor());
 686			return view;
 687		} else if (type == STATUS) {
 688			if ("LOAD_MORE".equals(message.getBody())) {
 689				viewHolder.status_message.setVisibility(View.GONE);
 690				viewHolder.contact_picture.setVisibility(View.GONE);
 691				viewHolder.load_more_messages.setVisibility(View.VISIBLE);
 692				viewHolder.load_more_messages.setOnClickListener(new OnClickListener() {
 693					@Override
 694					public void onClick(View v) {
 695						loadMoreMessages(message.getConversation());
 696					}
 697				});
 698			} else {
 699				viewHolder.status_message.setVisibility(View.VISIBLE);
 700				viewHolder.load_more_messages.setVisibility(View.GONE);
 701				viewHolder.status_message.setText(message.getBody());
 702				boolean showAvatar;
 703				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 704					showAvatar = true;
 705					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 706				} else if (message.getCounterpart() != null ){
 707					showAvatar = true;
 708					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 709				} else {
 710					showAvatar = false;
 711				}
 712				if (showAvatar) {
 713					viewHolder.contact_picture.setAlpha(0.5f);
 714					viewHolder.contact_picture.setVisibility(View.VISIBLE);
 715				} else {
 716					viewHolder.contact_picture.setVisibility(View.GONE);
 717				}
 718			}
 719			return view;
 720		} else {
 721			loadAvatar(message, viewHolder.contact_picture,activity.getPixel(48));
 722		}
 723
 724		viewHolder.contact_picture
 725			.setOnClickListener(new OnClickListener() {
 726
 727				@Override
 728				public void onClick(View v) {
 729					if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
 730						MessageAdapter.this.mOnContactPictureClickedListener
 731								.onContactPictureClicked(message);
 732					}
 733
 734				}
 735			});
 736		viewHolder.contact_picture
 737			.setOnLongClickListener(new OnLongClickListener() {
 738
 739				@Override
 740				public boolean onLongClick(View v) {
 741					if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
 742						MessageAdapter.this.mOnContactPictureLongClickedListener
 743								.onContactPictureLongClicked(message);
 744						return true;
 745					} else {
 746						return false;
 747					}
 748				}
 749			});
 750
 751		final Transferable transferable = message.getTransferable();
 752		if (transferable != null && transferable.getStatus() != Transferable.STATUS_UPLOADING) {
 753			if (transferable.getStatus() == Transferable.STATUS_OFFER) {
 754				displayDownloadableMessage(viewHolder,message,activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, message)));
 755			} else if (transferable.getStatus() == Transferable.STATUS_OFFER_CHECK_FILESIZE) {
 756				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 757			} else {
 758				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first,darkBackground);
 759			}
 760		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 761			displayImageMessage(viewHolder, message);
 762		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 763			if (message.getFileParams().width > 0) {
 764				displayImageMessage(viewHolder,message);
 765			} else {
 766				displayOpenableMessage(viewHolder, message);
 767			}
 768		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 769			if (account.isPgpDecryptionServiceConnected()) {
 770				if (!account.hasPendingPgpIntent(conversation)) {
 771					displayInfoMessage(viewHolder, activity.getString(R.string.message_decrypting), darkBackground);
 772				} else {
 773					displayInfoMessage(viewHolder, activity.getString(R.string.pgp_message), darkBackground);
 774				}
 775			} else {
 776				displayInfoMessage(viewHolder,activity.getString(R.string.install_openkeychain),darkBackground);
 777				if (viewHolder != null) {
 778					viewHolder.message_box
 779						.setOnClickListener(new OnClickListener() {
 780
 781							@Override
 782							public void onClick(View v) {
 783								activity.showInstallPgpDialog();
 784							}
 785						});
 786				}
 787			}
 788		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
 789			displayDecryptionFailed(viewHolder,darkBackground);
 790		} else {
 791			if (GeoHelper.isGeoUri(message.getBody())) {
 792				displayLocationMessage(viewHolder,message);
 793			} else if (message.bodyIsHeart()) {
 794				displayHeartMessage(viewHolder, message.getBody().trim());
 795			} else if (message.treatAsDownloadable()) {
 796				try {
 797					URL url = new URL(message.getBody());
 798					displayDownloadableMessage(viewHolder,
 799							message,
 800							activity.getString(R.string.check_x_filesize_on_host,
 801									UIHelper.getFileDescriptionString(activity, message),
 802									url.getHost()));
 803				} catch (Exception e) {
 804					displayDownloadableMessage(viewHolder,
 805							message,
 806							activity.getString(R.string.check_x_filesize,
 807									UIHelper.getFileDescriptionString(activity, message)));
 808				}
 809			} else {
 810				displayTextMessage(viewHolder, message, darkBackground, type);
 811			}
 812		}
 813
 814		if (type == RECEIVED) {
 815			if(isInValidSession) {
 816				int bubble;
 817				if (!mUseGreenBackground) {
 818					bubble = activity.getThemeResource(R.attr.message_bubble_received_monochrome, R.drawable.message_bubble_received_white);
 819				} else {
 820					bubble = activity.getThemeResource(R.attr.message_bubble_received_green, R.drawable.message_bubble_received);
 821				}
 822				viewHolder.message_box.setBackgroundResource(bubble);
 823				viewHolder.encryption.setVisibility(View.GONE);
 824			} else {
 825				viewHolder.message_box.setBackgroundResource(R.drawable.message_bubble_received_warning);
 826				viewHolder.encryption.setVisibility(View.VISIBLE);
 827				if (omemoEncryption && !message.isTrusted()) {
 828					viewHolder.encryption.setText(R.string.not_trusted);
 829				} else {
 830					viewHolder.encryption.setText(CryptoHelper.encryptionTypeToText(message.getEncryption()));
 831				}
 832			}
 833		}
 834
 835		displayStatus(viewHolder, message, type, darkBackground);
 836
 837		return view;
 838	}
 839
 840	@Override
 841	public void notifyDataSetChanged() {
 842		listSelectionManager.onBeforeNotifyDataSetChanged();
 843		super.notifyDataSetChanged();
 844		listSelectionManager.onAfterNotifyDataSetChanged();
 845	}
 846
 847	private String transformText(CharSequence text, int start, int end, boolean forCopy) {
 848		SpannableStringBuilder builder = new SpannableStringBuilder(text);
 849		Object copySpan = new Object();
 850		builder.setSpan(copySpan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 851		DividerSpan[] dividerSpans = builder.getSpans(0, builder.length(), DividerSpan.class);
 852		for (DividerSpan dividerSpan : dividerSpans) {
 853			builder.replace(builder.getSpanStart(dividerSpan), builder.getSpanEnd(dividerSpan),
 854					dividerSpan.isLarge() ? "\n\n" : "\n");
 855		}
 856		start = builder.getSpanStart(copySpan);
 857		end = builder.getSpanEnd(copySpan);
 858		if (start == -1 || end == -1) return "";
 859		builder = new SpannableStringBuilder(builder, start, end);
 860		if (forCopy) {
 861			QuoteSpan[] quoteSpans = builder.getSpans(0, builder.length(), QuoteSpan.class);
 862			for (QuoteSpan quoteSpan : quoteSpans) {
 863				builder.insert(builder.getSpanStart(quoteSpan), "> ");
 864			}
 865		}
 866		return builder.toString();
 867	}
 868
 869	@Override
 870	public String transformTextForCopy(CharSequence text, int start, int end) {
 871		if (text instanceof Spanned) {
 872			return transformText(text, start, end, true);
 873		} else {
 874			return text.toString().substring(start, end);
 875		}
 876	}
 877
 878	public interface OnQuoteListener {
 879		public void onQuote(String text);
 880	}
 881
 882	private class MessageBodyActionModeCallback implements ActionMode.Callback {
 883
 884		private final TextView textView;
 885
 886		public MessageBodyActionModeCallback(TextView textView) {
 887			this.textView = textView;
 888		}
 889
 890		@Override
 891		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 892			if (onQuoteListener != null) {
 893				int quoteResId = activity.getThemeResource(R.attr.icon_quote, R.drawable.ic_action_reply);
 894				// 3rd item is placed after "copy" item
 895				menu.add(0, android.R.id.button1, 3, R.string.quote).setIcon(quoteResId)
 896						.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
 897			}
 898			return false;
 899		}
 900
 901		@Override
 902		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 903			return false;
 904		}
 905
 906		@Override
 907		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 908			if (item.getItemId() == android.R.id.button1) {
 909				int start = textView.getSelectionStart();
 910				int end = textView.getSelectionEnd();
 911				if (end > start) {
 912					String text = transformText(textView.getText(), start, end, false);
 913					if (onQuoteListener != null) {
 914						onQuoteListener.onQuote(text);
 915					}
 916					mode.finish();
 917				}
 918				return true;
 919			}
 920			return false;
 921		}
 922
 923		@Override
 924		public void onDestroyActionMode(ActionMode mode) {}
 925	}
 926
 927	public void openDownloadable(Message message) {
 928		DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 929		if (!file.exists()) {
 930			Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
 931			return;
 932		}
 933		Intent openIntent = new Intent(Intent.ACTION_VIEW);
 934		String mime = file.getMimeType();
 935		if (mime == null) {
 936			mime = "*/*";
 937		}
 938		Uri uri;
 939		try {
 940			uri = FileBackend.getUriForFile(activity, file);
 941		} catch (SecurityException e) {
 942			Toast.makeText(activity, activity.getString(R.string.no_permission_to_access_x, file.getAbsolutePath()), Toast.LENGTH_SHORT).show();
 943			return;
 944		}
 945		openIntent.setDataAndType(uri, mime);
 946		openIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 947		PackageManager manager = activity.getPackageManager();
 948		List<ResolveInfo> info = manager.queryIntentActivities(openIntent, 0);
 949		if (info.size() == 0) {
 950			openIntent.setDataAndType(uri,"*/*");
 951		}
 952		try {
 953			getContext().startActivity(openIntent);
 954		}  catch (ActivityNotFoundException e) {
 955			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
 956		}
 957	}
 958
 959	public void showLocation(Message message) {
 960		for(Intent intent : GeoHelper.createGeoIntentsFromMessage(message)) {
 961			if (intent.resolveActivity(getContext().getPackageManager()) != null) {
 962				getContext().startActivity(intent);
 963				return;
 964			}
 965		}
 966		Toast.makeText(activity,R.string.no_application_found_to_display_location,Toast.LENGTH_SHORT).show();
 967	}
 968
 969	public void updatePreferences() {
 970		this.mIndicateReceived = activity.indicateReceived();
 971		this.mUseGreenBackground = activity.useGreenBackground();
 972	}
 973
 974	public TextView getMessageBody(View view) {
 975		final Object tag = view.getTag();
 976		if (tag instanceof ViewHolder) {
 977			final ViewHolder viewHolder = (ViewHolder) tag;
 978			return viewHolder.messageBody;
 979		}
 980		return null;
 981	}
 982
 983	public interface OnContactPictureClicked {
 984		void onContactPictureClicked(Message message);
 985	}
 986
 987	public interface OnContactPictureLongClicked {
 988		void onContactPictureLongClicked(Message message);
 989	}
 990
 991	private static class ViewHolder {
 992
 993		protected LinearLayout message_box;
 994		protected Button download_button;
 995		protected ImageView image;
 996		protected ImageView indicator;
 997		protected ImageView indicatorReceived;
 998		protected TextView time;
 999		protected CopyTextView messageBody;
1000		protected ImageView contact_picture;
1001		protected TextView status_message;
1002		protected TextView encryption;
1003		public Button load_more_messages;
1004		public ImageView edit_indicator;
1005	}
1006
1007	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
1008		private final WeakReference<ImageView> imageViewReference;
1009		private Message message = null;
1010		private final int size;
1011
1012		public BitmapWorkerTask(ImageView imageView, int size) {
1013			imageViewReference = new WeakReference<>(imageView);
1014			this.size = size;
1015		}
1016
1017		@Override
1018		protected Bitmap doInBackground(Message... params) {
1019			return activity.avatarService().get(params[0], size, isCancelled());
1020		}
1021
1022		@Override
1023		protected void onPostExecute(Bitmap bitmap) {
1024			if (bitmap != null && !isCancelled()) {
1025				final ImageView imageView = imageViewReference.get();
1026				if (imageView != null) {
1027					imageView.setImageBitmap(bitmap);
1028					imageView.setBackgroundColor(0x00000000);
1029				}
1030			}
1031		}
1032	}
1033
1034	public void loadAvatar(Message message, ImageView imageView, int size) {
1035		if (cancelPotentialWork(message, imageView)) {
1036			final Bitmap bm = activity.avatarService().get(message, size, true);
1037			if (bm != null) {
1038				cancelPotentialWork(message, imageView);
1039				imageView.setImageBitmap(bm);
1040				imageView.setBackgroundColor(0x00000000);
1041			} else {
1042				imageView.setBackgroundColor(UIHelper.getColorForName(UIHelper.getMessageDisplayName(message)));
1043				imageView.setImageDrawable(null);
1044				final BitmapWorkerTask task = new BitmapWorkerTask(imageView, size);
1045				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
1046				imageView.setImageDrawable(asyncDrawable);
1047				try {
1048					task.execute(message);
1049				} catch (final RejectedExecutionException ignored) {
1050				}
1051			}
1052		}
1053	}
1054
1055	public static boolean cancelPotentialWork(Message message, ImageView imageView) {
1056		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
1057
1058		if (bitmapWorkerTask != null) {
1059			final Message oldMessage = bitmapWorkerTask.message;
1060			if (oldMessage == null || message != oldMessage) {
1061				bitmapWorkerTask.cancel(true);
1062			} else {
1063				return false;
1064			}
1065		}
1066		return true;
1067	}
1068
1069	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
1070		if (imageView != null) {
1071			final Drawable drawable = imageView.getDrawable();
1072			if (drawable instanceof AsyncDrawable) {
1073				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
1074				return asyncDrawable.getBitmapWorkerTask();
1075			}
1076		}
1077		return null;
1078	}
1079
1080	static class AsyncDrawable extends BitmapDrawable {
1081		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
1082
1083		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
1084			super(res, bitmap);
1085			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
1086		}
1087
1088		public BitmapWorkerTask getBitmapWorkerTask() {
1089			return bitmapWorkerTaskReference.get();
1090		}
1091	}
1092}