add icons for gpx files

17 files changed, 614 insertions, 574 deletions

diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java
index bf6cc0689..03920f2dc 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/MediaAdapter.java
@@ -11,6 +11,7 @@ import android.support.annotation.AttrRes;
 import android.support.annotation.DimenRes;
 import android.support.annotation.NonNull;
 import android.support.v7.widget.RecyclerView;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
 import android.widget.ImageView;
@@ -21,6 +22,7 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.RejectedExecutionException;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.databinding.MediaBinding;
 import eu.siacs.conversations.services.ExportBackupService;
@@ -51,14 +53,16 @@ public class MediaAdapter extends RecyclerView.Adapter<MediaAdapter.MediaViewHol
         this.mediaSize = Math.round(activity.getResources().getDimension(mediaSize));
     }
 
+    @SuppressWarnings("rawtypes")
     public static void setMediaSize(RecyclerView recyclerView, int mediaSize) {
-        RecyclerView.Adapter adapter = recyclerView.getAdapter();
+        final RecyclerView.Adapter adapter = recyclerView.getAdapter();
         if (adapter instanceof MediaAdapter) {
             ((MediaAdapter) adapter).setMediaSize(mediaSize);
         }
     }
 
-    private static @AttrRes int getImageAttr(Attachment attachment) {
+    private static @AttrRes
+    int getImageAttr(Attachment attachment) {
         final @AttrRes int attr;
         if (attachment.getType() == Attachment.Type.LOCATION) {
             attr = R.attr.media_preview_location;
@@ -66,6 +70,7 @@ public class MediaAdapter extends RecyclerView.Adapter<MediaAdapter.MediaViewHol
             attr = R.attr.media_preview_recording;
         } else {
             final String mime = attachment.getMime();
+            Log.d(Config.LOGTAG, "mime=" + mime);
             if (mime == null) {
                 attr = R.attr.media_preview_unknown;
             } else if (mime.startsWith("audio/")) {
@@ -84,6 +89,8 @@ public class MediaAdapter extends RecyclerView.Adapter<MediaAdapter.MediaViewHol
                 attr = R.attr.media_preview_backup;
             } else if (DOCUMENT_MIMES.contains(mime)) {
                 attr = R.attr.media_preview_document;
+            } else if (mime.equals("application/gpx+xml")) {
+                attr = R.attr.media_preview_tour;
             } else {
                 attr = R.attr.media_preview_unknown;
             }
@@ -155,7 +162,7 @@ public class MediaAdapter extends RecyclerView.Adapter<MediaAdapter.MediaViewHol
 
     private void loadPreview(Attachment attachment, ImageView imageView) {
         if (cancelPotentialWork(attachment, imageView)) {
-            final Bitmap bm = activity.xmppConnectionService.getFileBackend().getPreviewForUri(attachment,mediaSize,true);
+            final Bitmap bm = activity.xmppConnectionService.getFileBackend().getPreviewForUri(attachment, mediaSize, true);
             if (bm != null) {
                 cancelPotentialWork(attachment, imageView);
                 imageView.setImageBitmap(bm);
diff --git a/src/main/java/eu/siacs/conversations/ui/util/Attachment.java b/src/main/java/eu/siacs/conversations/ui/util/Attachment.java
index 14d5749a1..4083d5b04 100644
--- a/src/main/java/eu/siacs/conversations/ui/util/Attachment.java
+++ b/src/main/java/eu/siacs/conversations/ui/util/Attachment.java
@@ -36,6 +36,8 @@ import android.net.Uri;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import com.google.common.base.MoreObjects;
+
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -87,6 +89,16 @@ public class Attachment implements Parcelable {
         return type;
     }
 
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("uri", uri)
+                .add("type", type)
+                .add("uuid", uuid)
+                .add("mime", mime)
+                .toString();
+    }
+
     public enum Type {
         FILE, IMAGE, LOCATION, RECORDING
     }
diff --git a/src/main/java/eu/siacs/conversations/utils/MimeUtils.java b/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
index e26010d69..530310f0b 100644
--- a/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
+++ b/src/main/java/eu/siacs/conversations/utils/MimeUtils.java
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 package eu.siacs.conversations.utils;
+
 import android.content.Context;
 import android.net.Uri;
 import android.util.Log;
@@ -38,6 +39,7 @@ import eu.siacs.conversations.services.ExportBackupService;
 public final class MimeUtils {
     private static final Map<String, String> mimeTypeToExtensionMap = new HashMap<>();
     private static final Map<String, String> extensionToMimeTypeMap = new HashMap<>();
+
     static {
         // The following table is based on /etc/mime.types data minus
         // chemical/* MIME types and MIME types that don't map to any
@@ -52,7 +54,8 @@ public final class MimeUtils {
         // by guessExtensionFromMimeType.
         add("application/andrew-inset", "ez");
         add("application/dsptype", "tsp");
-        add("application/epub+zip","epub");
+        add("application/epub+zip", "epub");
+        add("application/gpx+xml", "gpx");
         add("application/hta", "hta");
         add("application/mac-binhex40", "hqx");
         add("application/mathematica", "nb");
@@ -68,9 +71,9 @@ public final class MimeUtils {
         add("application/rdf+xml", "rdf");
         add("application/rss+xml", "rss");
         add("application/zip", "zip");
-        add("application/vnd.amazon.mobi8-ebook","azw3");
-        add("application/vnd.amazon.mobi8-ebook","azw");
-        add("application/vnd.amazon.mobi8-ebook","kfx");
+        add("application/vnd.amazon.mobi8-ebook", "azw3");
+        add("application/vnd.amazon.mobi8-ebook", "azw");
+        add("application/vnd.amazon.mobi8-ebook", "kfx");
         add("application/vnd.android.package-archive", "apk");
         add("application/vnd.cinderella", "cdy");
         add(ExportBackupService.MIME_TYPE, "ceb");
@@ -183,7 +186,7 @@ public final class MimeUtils {
         add("application/x-maker", "book");
         add("application/x-maker", "fbdoc");
         add("application/x-mif", "mif");
-        add("application/x-mobipocket-ebook","mobi");
+        add("application/x-mobipocket-ebook", "mobi");
         add("application/x-ms-wmd", "wmd");
         add("application/x-ms-wmz", "wmz");
         add("application/x-msi", "msi");
@@ -242,7 +245,7 @@ public final class MimeUtils {
         add("audio/mpeg", "mp2");
         add("audio/mpeg", "m4a");
         add("audio/mpegurl", "m3u");
-        add("audio/ogg","oga");
+        add("audio/ogg", "oga");
         add("audio/prs.sid", "sid");
         add("audio/x-aiff", "aif");
         add("audio/x-aiff", "aiff");
@@ -268,7 +271,7 @@ public final class MimeUtils {
         add("image/ico", "cur");
         add("image/ico", "ico");
         add("image/ief", "ief");
-        add("image/heic","heic");
+        add("image/heic", "heic");
         // add ".jpg" first so it will be the default for guessExtensionFromMimeType
         add("image/jpeg", "jpg");
         add("image/jpeg", "jpeg");
@@ -367,7 +370,7 @@ public final class MimeUtils {
         add("video/fli", "fli");
         add("video/m4v", "m4v");
         add("video/mp2ts", "ts");
-        add("video/ogg","ogv");
+        add("video/ogg", "ogv");
         add("video/mpeg", "mpeg");
         add("video/mpeg", "mpg");
         add("video/mpeg", "mpe");
@@ -393,6 +396,7 @@ public final class MimeUtils {
         add("x-epoc/x-sisx-app", "sisx");
         applyOverrides();
     }
+
     private static void add(String mimeType, String extension) {
         // If we have an existing x -> y mapping, we do not want to
         // override it with another mapping x -> y2.
@@ -406,6 +410,7 @@ public final class MimeUtils {
             extensionToMimeTypeMap.put(extension, mimeType);
         }
     }
+
     private static InputStream getContentTypesPropertiesStream() {
         // User override?
         String userTable = System.getProperty("content.types.user.table");
@@ -428,6 +433,7 @@ public final class MimeUtils {
         }
         return null;
     }
+
     /**
      * This isn't what the RI does. The RI doesn't have hard-coded defaults, so supplying your
      * own "content.types.user.table" means you don't get any of the built-ins, and the built-ins
@@ -456,10 +462,13 @@ public final class MimeUtils {
         } catch (IOException ignored) {
         }
     }
+
     private MimeUtils() {
     }
+
     /**
      * Returns true if the given MIME type has an entry in the map.
+     *
      * @param mimeType A MIME type (i.e. text/plain)
      * @return True iff there is a mimeType entry in the map.
      */
@@ -469,8 +478,10 @@ public final class MimeUtils {
         }
         return mimeTypeToExtensionMap.containsKey(mimeType);
     }
+
     /**
      * Returns the MIME type for the given extension.
+     *
      * @param extension A file extension without the leading '.'
      * @return The MIME type for the given extension or null iff there is none.
      */
@@ -480,8 +491,10 @@ public final class MimeUtils {
         }
         return extensionToMimeTypeMap.get(extension.toLowerCase());
     }
+
     /**
      * Returns true if the given extension has a registered MIME type.
+     *
      * @param extension A file extension without the leading '.'
      * @return True iff there is an extension entry in the map.
      */
@@ -491,10 +504,12 @@ public final class MimeUtils {
         }
         return extensionToMimeTypeMap.containsKey(extension);
     }
+
     /**
      * Returns the registered extension for the given MIME type. Note that some
      * MIME types map to multiple extensions. This call will return the most
      * common extension for the given MIME type.
+     *
      * @param mimeType A MIME type (i.e. text/plain)
      * @return The extension for the given MIME type or null iff there is none.
      */
@@ -506,7 +521,7 @@ public final class MimeUtils {
     }
 
     public static String guessMimeTypeFromUriAndMime(final Context context, final Uri uri, final String mime) {
-        Log.d(Config.LOGTAG,"guessMimeTypeFromUriAndMime "+uri+" and mime="+mime);
+        Log.d(Config.LOGTAG, "guessMimeTypeFromUriAndMime " + uri + " and mime=" + mime);
         if (mime == null || mime.equals("application/octet-stream")) {
             final String guess = guessMimeTypeFromUri(context, uri);
             if (guess != null) {
@@ -515,7 +530,7 @@ public final class MimeUtils {
                 return mime;
             }
         }
-        return guessMimeTypeFromUri(context ,uri);
+        return guessMimeTypeFromUri(context, uri);
     }
 
     public static String guessMimeTypeFromUri(Context context, Uri uri) {
@@ -565,7 +580,7 @@ public final class MimeUtils {
             String extension = filename.substring(dotPosition + 1);
             // we want the real file extension, not the crypto one
             if (ignoreCryptoExtension && Transferable.VALID_CRYPTO_EXTENSIONS.contains(extension)) {
-                return extractRelevantExtension(filename.substring(0,dotPosition));
+                return extractRelevantExtension(filename.substring(0, dotPosition));
             } else {
                 return extension;
             }
diff --git a/src/main/java/eu/siacs/conversations/utils/UIHelper.java b/src/main/java/eu/siacs/conversations/utils/UIHelper.java
index 238fd0875..bf87dd0bd 100644
--- a/src/main/java/eu/siacs/conversations/utils/UIHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/UIHelper.java
@@ -32,564 +32,566 @@ import eu.siacs.conversations.xmpp.Jid;
 
 public class UIHelper {
 
-	private static int[] UNSAFE_COLORS = {
-			0xFFF44336, //red 500
-			0xFFE53935, //red 600
-			0xFFD32F2F, //red 700
-			0xFFC62828, //red 800
-
-			0xFFEF6C00, //orange 800
-
-			0xFFF4511E, //deep orange 600
-			0xFFE64A19, //deep orange 700
-			0xFFD84315, //deep orange 800,
-	};
-
-	private static int[] SAFE_COLORS = {
-			0xFFE91E63, //pink 500
-			0xFFD81B60, //pink 600
-			0xFFC2185B, //pink 700
-			0xFFAD1457, //pink 800
-
-			0xFF9C27B0, //purple 500
-			0xFF8E24AA, //purple 600
-			0xFF7B1FA2, //purple 700
-			0xFF6A1B9A, //purple 800
-
-			0xFF673AB7, //deep purple 500,
-			0xFF5E35B1, //deep purple 600
-			0xFF512DA8, //deep purple 700
-			0xFF4527A0, //deep purple 800,
-
-			0xFF3F51B5, //indigo 500,
-			0xFF3949AB,//indigo 600
-			0xFF303F9F,//indigo 700
-			0xFF283593, //indigo 800
-
-			0xFF2196F3, //blue 500
-			0xFF1E88E5, //blue 600
-			0xFF1976D2, //blue 700
-			0xFF1565C0, //blue 800
-
-			0xFF03A9F4, //light blue 500
-			0xFF039BE5, //light blue 600
-			0xFF0288D1, //light blue 700
-			0xFF0277BD, //light blue 800
-
-			0xFF00BCD4, //cyan 500
-			0xFF00ACC1, //cyan 600
-			0xFF0097A7, //cyan 700
-			0xFF00838F, //cyan 800
-
-			0xFF009688, //teal 500,
-			0xFF00897B, //teal 600
-			0xFF00796B, //teal 700
-			0xFF00695C, //teal 800,
-
-			//0xFF558B2F, //light green 800
-
-			//0xFFC0CA33, //lime 600
-			0xFF9E9D24, //lime 800
-
-			0xFF795548, //brown 500,
-			//0xFF4E342E, //brown 800
-			0xFF607D8B, //blue grey 500,
-			//0xFF37474F //blue grey 800
-	};
-
-	private static final int[] COLORS;
-
-	static {
-		COLORS = Arrays.copyOf(SAFE_COLORS, SAFE_COLORS.length + UNSAFE_COLORS.length);
-		System.arraycopy(UNSAFE_COLORS, 0, COLORS, SAFE_COLORS.length, UNSAFE_COLORS.length);
-	}
-
-	private static final List<String> LOCATION_QUESTIONS = Arrays.asList(
-			"where are you", //en
-			"where are you now", //en
-			"where are you right now", //en
-			"whats your 20", //en
-			"what is your 20", //en
-			"what's your 20", //en
-			"whats your twenty", //en
-			"what is your twenty", //en
-			"what's your twenty", //en
-			"wo bist du", //de
-			"wo bist du jetzt", //de
-			"wo bist du gerade", //de
-			"wo seid ihr", //de
-			"wo seid ihr jetzt", //de
-			"wo seid ihr gerade", //de
-			"dónde estás", //es
-			"donde estas" //es
-	);
-
-	private static final List<Character> PUNCTIONATION = Arrays.asList('.', ',', '?', '!', ';', ':');
-
-	private static final int SHORT_DATE_FLAGS = DateUtils.FORMAT_SHOW_DATE
-			| DateUtils.FORMAT_NO_YEAR | DateUtils.FORMAT_ABBREV_ALL;
-	private static final int FULL_DATE_FLAGS = DateUtils.FORMAT_SHOW_TIME
-			| DateUtils.FORMAT_ABBREV_ALL | DateUtils.FORMAT_SHOW_DATE;
-
-	public static String readableTimeDifference(Context context, long time) {
-		return readableTimeDifference(context, time, false);
-	}
-
-	public static String readableTimeDifferenceFull(Context context, long time) {
-		return readableTimeDifference(context, time, true);
-	}
-
-	private static String readableTimeDifference(Context context, long time,
-	                                             boolean fullDate) {
-		if (time == 0) {
-			return context.getString(R.string.just_now);
-		}
-		Date date = new Date(time);
-		long difference = (System.currentTimeMillis() - time) / 1000;
-		if (difference < 60) {
-			return context.getString(R.string.just_now);
-		} else if (difference < 60 * 2) {
-			return context.getString(R.string.minute_ago);
-		} else if (difference < 60 * 15) {
-			return context.getString(R.string.minutes_ago, Math.round(difference / 60.0));
-		} else if (today(date)) {
-			java.text.DateFormat df = DateFormat.getTimeFormat(context);
-			return df.format(date);
-		} else {
-			if (fullDate) {
-				return DateUtils.formatDateTime(context, date.getTime(),
-						FULL_DATE_FLAGS);
-			} else {
-				return DateUtils.formatDateTime(context, date.getTime(),
-						SHORT_DATE_FLAGS);
-			}
-		}
-	}
-
-	private static boolean today(Date date) {
-		return sameDay(date, new Date(System.currentTimeMillis()));
-	}
-
-	public static boolean today(long date) {
-		return sameDay(date, System.currentTimeMillis());
-	}
-
-	public static boolean yesterday(long date) {
-		Calendar cal1 = Calendar.getInstance();
-		Calendar cal2 = Calendar.getInstance();
-		cal1.add(Calendar.DAY_OF_YEAR, -1);
-		cal2.setTime(new Date(date));
-		return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
-				&& cal1.get(Calendar.DAY_OF_YEAR) == cal2
-				.get(Calendar.DAY_OF_YEAR);
-	}
-
-	public static boolean sameDay(long a, long b) {
-		return sameDay(new Date(a), new Date(b));
-	}
-
-	private static boolean sameDay(Date a, Date b) {
-		Calendar cal1 = Calendar.getInstance();
-		Calendar cal2 = Calendar.getInstance();
-		cal1.setTime(a);
-		cal2.setTime(b);
-		return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
-				&& cal1.get(Calendar.DAY_OF_YEAR) == cal2
-				.get(Calendar.DAY_OF_YEAR);
-	}
-
-	public static String lastseen(Context context, boolean active, long time) {
-		long difference = (System.currentTimeMillis() - time) / 1000;
-		if (active) {
-			return context.getString(R.string.online_right_now);
-		} else if (difference < 60) {
-			return context.getString(R.string.last_seen_now);
-		} else if (difference < 60 * 2) {
-			return context.getString(R.string.last_seen_min);
-		} else if (difference < 60 * 60) {
-			return context.getString(R.string.last_seen_mins, Math.round(difference / 60.0));
-		} else if (difference < 60 * 60 * 2) {
-			return context.getString(R.string.last_seen_hour);
-		} else if (difference < 60 * 60 * 24) {
-			return context.getString(R.string.last_seen_hours,
-					Math.round(difference / (60.0 * 60.0)));
-		} else if (difference < 60 * 60 * 48) {
-			return context.getString(R.string.last_seen_day);
-		} else {
-			return context.getString(R.string.last_seen_days,
-					Math.round(difference / (60.0 * 60.0 * 24.0)));
-		}
-	}
-
-	public static int getColorForName(String name) {
-		return getColorForName(name, false);
-	}
-
-	public static int getColorForName(String name, boolean safe) {
-		if (Config.XEP_0392) {
-			return XEP0392Helper.rgbFromNick(name);
-		}
-		if (name == null || name.isEmpty()) {
-			return 0xFF202020;
-		}
-		if (safe) {
-			return SAFE_COLORS[(int) (getLongForName(name) % SAFE_COLORS.length)];
-		} else {
-			return COLORS[(int) (getLongForName(name) % COLORS.length)];
-		}
-	}
-
-	private static long getLongForName(String name) {
-		try {
-			final MessageDigest messageDigest = MessageDigest.getInstance("MD5");
-			return Math.abs(new BigInteger(messageDigest.digest(name.getBytes())).longValue());
-		} catch (Exception e) {
-			return 0;
-		}
-	}
-
-	public static Pair<CharSequence, Boolean> getMessagePreview(final Context context, final Message message) {
-		return getMessagePreview(context, message, 0);
-	}
-
-	public static Pair<CharSequence, Boolean> getMessagePreview(final Context context, final Message message, @ColorInt int textColor) {
-		final Transferable d = message.getTransferable();
-		if (d != null) {
-			switch (d.getStatus()) {
-				case Transferable.STATUS_CHECKING:
-					return new Pair<>(context.getString(R.string.checking_x,
-							getFileDescriptionString(context, message)), true);
-				case Transferable.STATUS_DOWNLOADING:
-					return new Pair<>(context.getString(R.string.receiving_x_file,
-							getFileDescriptionString(context, message),
-							d.getProgress()), true);
-				case Transferable.STATUS_OFFER:
-				case Transferable.STATUS_OFFER_CHECK_FILESIZE:
-					return new Pair<>(context.getString(R.string.x_file_offered_for_download,
-							getFileDescriptionString(context, message)), true);
-				case Transferable.STATUS_FAILED:
-					return new Pair<>(context.getString(R.string.file_transmission_failed), true);
-				case Transferable.STATUS_CANCELLED:
-					return new Pair<>(context.getString(R.string.file_transmission_cancelled), true);
-				case Transferable.STATUS_UPLOADING:
-					if (message.getStatus() == Message.STATUS_OFFERED) {
-						return new Pair<>(context.getString(R.string.offering_x_file,
-								getFileDescriptionString(context, message)), true);
-					} else {
-						return new Pair<>(context.getString(R.string.sending_x_file,
-								getFileDescriptionString(context, message)), true);
-					}
-				default:
-					return new Pair<>("", false);
-			}
-		} else if (message.isFileOrImage() && message.isDeleted()) {
-			return new Pair<>(context.getString(R.string.file_deleted), true);
-		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
-			return new Pair<>(context.getString(R.string.pgp_message), true);
-		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
-			return new Pair<>(context.getString(R.string.decryption_failed), true);
-		} else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE) {
-			return new Pair<>(context.getString(R.string.not_encrypted_for_this_device), true);
-		} else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL_FAILED) {
-			return new Pair<>(context.getString(R.string.omemo_decryption_failed), true);
-		} else if (message.isFileOrImage()) {
-			return new Pair<>(getFileDescriptionString(context, message), true);
-		} else if (message.getType() == Message.TYPE_RTP_SESSION) {
-			RtpSessionStatus rtpSessionStatus = RtpSessionStatus.of(message.getBody());
-			final boolean received = message.getStatus() == Message.STATUS_RECEIVED;
-			if (!rtpSessionStatus.successful && received) {
-				return new Pair<>(context.getString(R.string.missed_call),true);
-			} else {
-				return new Pair<>(context.getString(received ? R.string.incoming_call : R.string.outgoing_call), true);
-			}
-		} else {
-			final String body = MessageUtils.filterLtrRtl(message.getBody());
-			if (body.startsWith(Message.ME_COMMAND)) {
-				return new Pair<>(body.replaceAll("^" + Message.ME_COMMAND,
-						UIHelper.getMessageDisplayName(message) + " "), false);
-			} else if (message.isGeoUri()) {
-				return new Pair<>(context.getString(R.string.location), true);
-			} else if (message.treatAsDownloadable() || MessageUtils.unInitiatedButKnownSize(message)) {
-				return new Pair<>(context.getString(R.string.x_file_offered_for_download,
-						getFileDescriptionString(context, message)), true);
-			} else {
-				SpannableStringBuilder styledBody = new SpannableStringBuilder(body);
-				if (textColor != 0) {
-					StylingHelper.format(styledBody, 0, styledBody.length() - 1, textColor);
-				}
-				SpannableStringBuilder builder = new SpannableStringBuilder();
-				for (CharSequence l : CharSequenceUtils.split(styledBody, '\n')) {
-					if (l.length() > 0) {
-						if (l.toString().equals("```")) {
-							continue;
-						}
-						char first = l.charAt(0);
-						if ((first != '>' || !isPositionFollowedByQuoteableCharacter(l, 0)) && first != '\u00bb') {
-							CharSequence line = CharSequenceUtils.trim(l);
-							if (line.length() == 0) {
-								continue;
-							}
-							char last = line.charAt(line.length() - 1);
-							if (builder.length() != 0) {
-								builder.append(' ');
-							}
-							builder.append(line);
-							if (!PUNCTIONATION.contains(last)) {
-								break;
-							}
-						}
-					}
-				}
-				if (builder.length() == 0) {
-					builder.append(body.trim());
-				}
-				return new Pair<>(builder, false);
-			}
-		}
-	}
-
-	public static boolean isLastLineQuote(String body) {
-		if (body.endsWith("\n")) {
-			return false;
-		}
-		String[] lines = body.split("\n");
-		if (lines.length == 0) {
-			return false;
-		}
-		String line = lines[lines.length - 1];
-		if (line.isEmpty()) {
-			return false;
-		}
-		char first = line.charAt(0);
-		return first == '>' && isPositionFollowedByQuoteableCharacter(line,0) || first == '\u00bb';
-	}
-
-	public static CharSequence shorten(CharSequence input) {
-		return input.length() > 256 ? StylingHelper.subSequence(input, 0, 256) : input;
-	}
-
-	public static boolean isPositionFollowedByQuoteableCharacter(CharSequence body, int pos) {
-		return !isPositionFollowedByNumber(body, pos)
-				&& !isPositionFollowedByEmoticon(body, pos)
-				&& !isPositionFollowedByEquals(body, pos);
-	}
-
-	private static boolean isPositionFollowedByNumber(CharSequence body, int pos) {
-		boolean previousWasNumber = false;
-		for (int i = pos + 1; i < body.length(); i++) {
-			char c = body.charAt(i);
-			if (Character.isDigit(body.charAt(i))) {
-				previousWasNumber = true;
-			} else if (previousWasNumber && (c == '.' || c == ',')) {
-				previousWasNumber = false;
-			} else {
-				return (Character.isWhitespace(c) || c == '%' || c == '+') && previousWasNumber;
-			}
-		}
-		return previousWasNumber;
-	}
-
-	private static boolean isPositionFollowedByEquals(CharSequence body, int pos) {
-		return body.length() > pos + 1 && body.charAt(pos + 1) == '=';
-	}
-
-	private static boolean isPositionFollowedByEmoticon(CharSequence body, int pos) {
-		if (body.length() <= pos + 1) {
-			return false;
-		} else {
-			final char first = body.charAt(pos + 1);
-			return first == ';'
-					|| first == ':'
-					|| closingBeforeWhitespace(body, pos + 1);
-		}
-	}
-
-	private static boolean closingBeforeWhitespace(CharSequence body, int pos) {
-		for (int i = pos; i < body.length(); ++i) {
-			final char c = body.charAt(i);
-			if (Character.isWhitespace(c)) {
-				return false;
-			} else if (c == '<' || c == '>') {
-				return body.length() == i + 1 || Character.isWhitespace(body.charAt(i + 1));
-			}
-		}
-		return false;
-	}
-
-	public static boolean isPositionFollowedByQuote(CharSequence body, int pos) {
-		if (body.length() <= pos + 1 || Character.isWhitespace(body.charAt(pos + 1))) {
-			return false;
-		}
-		boolean previousWasWhitespace = false;
-		for (int i = pos + 1; i < body.length(); i++) {
-			char c = body.charAt(i);
-			if (c == '\n' || c == '»') {
-				return false;
-			} else if (c == '«' && !previousWasWhitespace) {
-				return true;
-			} else {
-				previousWasWhitespace = Character.isWhitespace(c);
-			}
-		}
-		return false;
-	}
-
-	public static String getDisplayName(MucOptions.User user) {
-		Contact contact = user.getContact();
-		if (contact != null) {
-			return contact.getDisplayName();
-		} else {
-			final String name = user.getName();
-			if (name != null) {
-				return name;
-			}
-			final Jid realJid = user.getRealJid();
-			if (realJid != null) {
-				return JidHelper.localPartOrFallback(realJid);
-			}
-			return null;
-		}
-	}
-
-	public static String concatNames(List<MucOptions.User> users) {
-		return concatNames(users, users.size());
-	}
-
-	public static String concatNames(List<MucOptions.User> users, int max) {
-		StringBuilder builder = new StringBuilder();
-		final boolean shortNames = users.size() >= 3;
-		for (int i = 0; i < Math.min(users.size(), max); ++i) {
-			if (builder.length() != 0) {
-				builder.append(", ");
-			}
-			final String name = UIHelper.getDisplayName(users.get(i));
-			if (name != null) {
-				builder.append(shortNames ? name.split("\\s+")[0] : name);
-			}
-		}
-		return builder.toString();
-	}
-
-	public static String getFileDescriptionString(final Context context, final Message message) {
-		if (message.getType() == Message.TYPE_IMAGE) {
-			return context.getString(R.string.image);
-		}
-		final String mime = message.getMimeType();
-		if (mime == null) {
-			return context.getString(R.string.file);
-		} else if (mime.startsWith("audio/")) {
-			return context.getString(R.string.audio);
-		} else if (mime.startsWith("video/")) {
-			return context.getString(R.string.video);
-		} else if (mime.equals("image/gif")) {
-			return context.getString(R.string.gif);
-		} else if (mime.startsWith("image/")) {
-			return context.getString(R.string.image);
-		} else if (mime.contains("pdf")) {
-			return context.getString(R.string.pdf_document);
-		} else if (mime.equals("application/vnd.android.package-archive")) {
-			return context.getString(R.string.apk);
-		} else if (mime.equals(ExportBackupService.MIME_TYPE)) {
-			return context.getString(R.string.conversations_backup);
-		} else if (mime.contains("vcard")) {
-			return context.getString(R.string.vcard);
-		} else if (mime.equals("text/x-vcalendar") || mime.equals("text/calendar")) {
-			return context.getString(R.string.event);
-		} else if (mime.equals("application/epub+zip") || mime.equals("application/vnd.amazon.mobi8-ebook")) {
-			return context.getString(R.string.ebook);
-		} else {
-			return mime;
-		}
-	}
-
-	public static String getMessageDisplayName(final Message message) {
-		final Conversational conversation = message.getConversation();
-		if (message.getStatus() == Message.STATUS_RECEIVED) {
-			final Contact contact = message.getContact();
-			if (conversation.getMode() == Conversation.MODE_MULTI) {
-				if (contact != null) {
-					return contact.getDisplayName();
-				} else {
-					return getDisplayedMucCounterpart(message.getCounterpart());
-				}
-			} else {
-				return contact != null ? contact.getDisplayName() : "";
-			}
-		} else {
-			if (conversation instanceof Conversation && conversation.getMode() == Conversation.MODE_MULTI) {
-				return ((Conversation) conversation).getMucOptions().getSelf().getName();
-			} else {
-				final Jid jid = conversation.getAccount().getJid();
-				return jid.getLocal() != null ? jid.getLocal() : jid.getDomain().toString();
-			}
-		}
-	}
-
-	public static String getMessageHint(Context context, Conversation conversation) {
-		switch (conversation.getNextEncryption()) {
-			case Message.ENCRYPTION_NONE:
-				if (Config.multipleEncryptionChoices()) {
-					return context.getString(R.string.send_unencrypted_message);
-				} else {
-					return context.getString(R.string.send_message_to_x, conversation.getName());
-				}
-			case Message.ENCRYPTION_AXOLOTL:
-				AxolotlService axolotlService = conversation.getAccount().getAxolotlService();
-				if (axolotlService != null && axolotlService.trustedSessionVerified(conversation)) {
-					return context.getString(R.string.send_omemo_x509_message);
-				} else {
-					return context.getString(R.string.send_omemo_message);
-				}
-			case Message.ENCRYPTION_PGP:
-				return context.getString(R.string.send_pgp_message);
-			default:
-				return "";
-		}
-	}
-
-	public static String getDisplayedMucCounterpart(final Jid counterpart) {
-		if (counterpart == null) {
-			return "";
-		} else if (!counterpart.isBareJid()) {
-			return counterpart.getResource().trim();
-		} else {
-			return counterpart.toString().trim();
-		}
-	}
-
-	public static boolean receivedLocationQuestion(Message message) {
-		if (message == null
-				|| message.getStatus() != Message.STATUS_RECEIVED
-				|| message.getType() != Message.TYPE_TEXT) {
-			return false;
-		}
-		String body = message.getBody() == null ? null : message.getBody().trim().toLowerCase(Locale.getDefault());
-		body = body.replace("?", "").replace("¿", "");
-		return LOCATION_QUESTIONS.contains(body);
-	}
-
-	public static ListItem.Tag getTagForStatus(Context context, Presence.Status status) {
-		switch (status) {
-			case CHAT:
-				return new ListItem.Tag(context.getString(R.string.presence_chat), 0xff259b24);
-			case AWAY:
-				return new ListItem.Tag(context.getString(R.string.presence_away), 0xffff9800);
-			case XA:
-				return new ListItem.Tag(context.getString(R.string.presence_xa), 0xfff44336);
-			case DND:
-				return new ListItem.Tag(context.getString(R.string.presence_dnd), 0xfff44336);
-			default:
-				return new ListItem.Tag(context.getString(R.string.presence_online), 0xff259b24);
-		}
-	}
-
-	public static String filesizeToString(long size) {
-		if (size > (1.5 * 1024 * 1024)) {
-			return Math.round(size * 1f / (1024 * 1024)) + " MiB";
-		} else if (size >= 1024) {
-			return Math.round(size * 1f / 1024) + " KiB";
-		} else {
-			return size + " B";
-		}
-	}
+    private static int[] UNSAFE_COLORS = {
+            0xFFF44336, //red 500
+            0xFFE53935, //red 600
+            0xFFD32F2F, //red 700
+            0xFFC62828, //red 800
+
+            0xFFEF6C00, //orange 800
+
+            0xFFF4511E, //deep orange 600
+            0xFFE64A19, //deep orange 700
+            0xFFD84315, //deep orange 800,
+    };
+
+    private static int[] SAFE_COLORS = {
+            0xFFE91E63, //pink 500
+            0xFFD81B60, //pink 600
+            0xFFC2185B, //pink 700
+            0xFFAD1457, //pink 800
+
+            0xFF9C27B0, //purple 500
+            0xFF8E24AA, //purple 600
+            0xFF7B1FA2, //purple 700
+            0xFF6A1B9A, //purple 800
+
+            0xFF673AB7, //deep purple 500,
+            0xFF5E35B1, //deep purple 600
+            0xFF512DA8, //deep purple 700
+            0xFF4527A0, //deep purple 800,
+
+            0xFF3F51B5, //indigo 500,
+            0xFF3949AB,//indigo 600
+            0xFF303F9F,//indigo 700
+            0xFF283593, //indigo 800
+
+            0xFF2196F3, //blue 500
+            0xFF1E88E5, //blue 600
+            0xFF1976D2, //blue 700
+            0xFF1565C0, //blue 800
+
+            0xFF03A9F4, //light blue 500
+            0xFF039BE5, //light blue 600
+            0xFF0288D1, //light blue 700
+            0xFF0277BD, //light blue 800
+
+            0xFF00BCD4, //cyan 500
+            0xFF00ACC1, //cyan 600
+            0xFF0097A7, //cyan 700
+            0xFF00838F, //cyan 800
+
+            0xFF009688, //teal 500,
+            0xFF00897B, //teal 600
+            0xFF00796B, //teal 700
+            0xFF00695C, //teal 800,
+
+            //0xFF558B2F, //light green 800
+
+            //0xFFC0CA33, //lime 600
+            0xFF9E9D24, //lime 800
+
+            0xFF795548, //brown 500,
+            //0xFF4E342E, //brown 800
+            0xFF607D8B, //blue grey 500,
+            //0xFF37474F //blue grey 800
+    };
+
+    private static final int[] COLORS;
+
+    static {
+        COLORS = Arrays.copyOf(SAFE_COLORS, SAFE_COLORS.length + UNSAFE_COLORS.length);
+        System.arraycopy(UNSAFE_COLORS, 0, COLORS, SAFE_COLORS.length, UNSAFE_COLORS.length);
+    }
+
+    private static final List<String> LOCATION_QUESTIONS = Arrays.asList(
+            "where are you", //en
+            "where are you now", //en
+            "where are you right now", //en
+            "whats your 20", //en
+            "what is your 20", //en
+            "what's your 20", //en
+            "whats your twenty", //en
+            "what is your twenty", //en
+            "what's your twenty", //en
+            "wo bist du", //de
+            "wo bist du jetzt", //de
+            "wo bist du gerade", //de
+            "wo seid ihr", //de
+            "wo seid ihr jetzt", //de
+            "wo seid ihr gerade", //de
+            "dónde estás", //es
+            "donde estas" //es
+    );
+
+    private static final List<Character> PUNCTIONATION = Arrays.asList('.', ',', '?', '!', ';', ':');
+
+    private static final int SHORT_DATE_FLAGS = DateUtils.FORMAT_SHOW_DATE
+            | DateUtils.FORMAT_NO_YEAR | DateUtils.FORMAT_ABBREV_ALL;
+    private static final int FULL_DATE_FLAGS = DateUtils.FORMAT_SHOW_TIME
+            | DateUtils.FORMAT_ABBREV_ALL | DateUtils.FORMAT_SHOW_DATE;
+
+    public static String readableTimeDifference(Context context, long time) {
+        return readableTimeDifference(context, time, false);
+    }
+
+    public static String readableTimeDifferenceFull(Context context, long time) {
+        return readableTimeDifference(context, time, true);
+    }
+
+    private static String readableTimeDifference(Context context, long time,
+                                                 boolean fullDate) {
+        if (time == 0) {
+            return context.getString(R.string.just_now);
+        }
+        Date date = new Date(time);
+        long difference = (System.currentTimeMillis() - time) / 1000;
+        if (difference < 60) {
+            return context.getString(R.string.just_now);
+        } else if (difference < 60 * 2) {
+            return context.getString(R.string.minute_ago);
+        } else if (difference < 60 * 15) {
+            return context.getString(R.string.minutes_ago, Math.round(difference / 60.0));
+        } else if (today(date)) {
+            java.text.DateFormat df = DateFormat.getTimeFormat(context);
+            return df.format(date);
+        } else {
+            if (fullDate) {
+                return DateUtils.formatDateTime(context, date.getTime(),
+                        FULL_DATE_FLAGS);
+            } else {
+                return DateUtils.formatDateTime(context, date.getTime(),
+                        SHORT_DATE_FLAGS);
+            }
+        }
+    }
+
+    private static boolean today(Date date) {
+        return sameDay(date, new Date(System.currentTimeMillis()));
+    }
+
+    public static boolean today(long date) {
+        return sameDay(date, System.currentTimeMillis());
+    }
+
+    public static boolean yesterday(long date) {
+        Calendar cal1 = Calendar.getInstance();
+        Calendar cal2 = Calendar.getInstance();
+        cal1.add(Calendar.DAY_OF_YEAR, -1);
+        cal2.setTime(new Date(date));
+        return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
+                && cal1.get(Calendar.DAY_OF_YEAR) == cal2
+                .get(Calendar.DAY_OF_YEAR);
+    }
+
+    public static boolean sameDay(long a, long b) {
+        return sameDay(new Date(a), new Date(b));
+    }
+
+    private static boolean sameDay(Date a, Date b) {
+        Calendar cal1 = Calendar.getInstance();
+        Calendar cal2 = Calendar.getInstance();
+        cal1.setTime(a);
+        cal2.setTime(b);
+        return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
+                && cal1.get(Calendar.DAY_OF_YEAR) == cal2
+                .get(Calendar.DAY_OF_YEAR);
+    }
+
+    public static String lastseen(Context context, boolean active, long time) {
+        long difference = (System.currentTimeMillis() - time) / 1000;
+        if (active) {
+            return context.getString(R.string.online_right_now);
+        } else if (difference < 60) {
+            return context.getString(R.string.last_seen_now);
+        } else if (difference < 60 * 2) {
+            return context.getString(R.string.last_seen_min);
+        } else if (difference < 60 * 60) {
+            return context.getString(R.string.last_seen_mins, Math.round(difference / 60.0));
+        } else if (difference < 60 * 60 * 2) {
+            return context.getString(R.string.last_seen_hour);
+        } else if (difference < 60 * 60 * 24) {
+            return context.getString(R.string.last_seen_hours,
+                    Math.round(difference / (60.0 * 60.0)));
+        } else if (difference < 60 * 60 * 48) {
+            return context.getString(R.string.last_seen_day);
+        } else {
+            return context.getString(R.string.last_seen_days,
+                    Math.round(difference / (60.0 * 60.0 * 24.0)));
+        }
+    }
+
+    public static int getColorForName(String name) {
+        return getColorForName(name, false);
+    }
+
+    public static int getColorForName(String name, boolean safe) {
+        if (Config.XEP_0392) {
+            return XEP0392Helper.rgbFromNick(name);
+        }
+        if (name == null || name.isEmpty()) {
+            return 0xFF202020;
+        }
+        if (safe) {
+            return SAFE_COLORS[(int) (getLongForName(name) % SAFE_COLORS.length)];
+        } else {
+            return COLORS[(int) (getLongForName(name) % COLORS.length)];
+        }
+    }
+
+    private static long getLongForName(String name) {
+        try {
+            final MessageDigest messageDigest = MessageDigest.getInstance("MD5");
+            return Math.abs(new BigInteger(messageDigest.digest(name.getBytes())).longValue());
+        } catch (Exception e) {
+            return 0;
+        }
+    }
+
+    public static Pair<CharSequence, Boolean> getMessagePreview(final Context context, final Message message) {
+        return getMessagePreview(context, message, 0);
+    }
+
+    public static Pair<CharSequence, Boolean> getMessagePreview(final Context context, final Message message, @ColorInt int textColor) {
+        final Transferable d = message.getTransferable();
+        if (d != null) {
+            switch (d.getStatus()) {
+                case Transferable.STATUS_CHECKING:
+                    return new Pair<>(context.getString(R.string.checking_x,
+                            getFileDescriptionString(context, message)), true);
+                case Transferable.STATUS_DOWNLOADING:
+                    return new Pair<>(context.getString(R.string.receiving_x_file,
+                            getFileDescriptionString(context, message),
+                            d.getProgress()), true);
+                case Transferable.STATUS_OFFER:
+                case Transferable.STATUS_OFFER_CHECK_FILESIZE:
+                    return new Pair<>(context.getString(R.string.x_file_offered_for_download,
+                            getFileDescriptionString(context, message)), true);
+                case Transferable.STATUS_FAILED:
+                    return new Pair<>(context.getString(R.string.file_transmission_failed), true);
+                case Transferable.STATUS_CANCELLED:
+                    return new Pair<>(context.getString(R.string.file_transmission_cancelled), true);
+                case Transferable.STATUS_UPLOADING:
+                    if (message.getStatus() == Message.STATUS_OFFERED) {
+                        return new Pair<>(context.getString(R.string.offering_x_file,
+                                getFileDescriptionString(context, message)), true);
+                    } else {
+                        return new Pair<>(context.getString(R.string.sending_x_file,
+                                getFileDescriptionString(context, message)), true);
+                    }
+                default:
+                    return new Pair<>("", false);
+            }
+        } else if (message.isFileOrImage() && message.isDeleted()) {
+            return new Pair<>(context.getString(R.string.file_deleted), true);
+        } else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+            return new Pair<>(context.getString(R.string.pgp_message), true);
+        } else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
+            return new Pair<>(context.getString(R.string.decryption_failed), true);
+        } else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE) {
+            return new Pair<>(context.getString(R.string.not_encrypted_for_this_device), true);
+        } else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL_FAILED) {
+            return new Pair<>(context.getString(R.string.omemo_decryption_failed), true);
+        } else if (message.isFileOrImage()) {
+            return new Pair<>(getFileDescriptionString(context, message), true);
+        } else if (message.getType() == Message.TYPE_RTP_SESSION) {
+            RtpSessionStatus rtpSessionStatus = RtpSessionStatus.of(message.getBody());
+            final boolean received = message.getStatus() == Message.STATUS_RECEIVED;
+            if (!rtpSessionStatus.successful && received) {
+                return new Pair<>(context.getString(R.string.missed_call), true);
+            } else {
+                return new Pair<>(context.getString(received ? R.string.incoming_call : R.string.outgoing_call), true);
+            }
+        } else {
+            final String body = MessageUtils.filterLtrRtl(message.getBody());
+            if (body.startsWith(Message.ME_COMMAND)) {
+                return new Pair<>(body.replaceAll("^" + Message.ME_COMMAND,
+                        UIHelper.getMessageDisplayName(message) + " "), false);
+            } else if (message.isGeoUri()) {
+                return new Pair<>(context.getString(R.string.location), true);
+            } else if (message.treatAsDownloadable() || MessageUtils.unInitiatedButKnownSize(message)) {
+                return new Pair<>(context.getString(R.string.x_file_offered_for_download,
+                        getFileDescriptionString(context, message)), true);
+            } else {
+                SpannableStringBuilder styledBody = new SpannableStringBuilder(body);
+                if (textColor != 0) {
+                    StylingHelper.format(styledBody, 0, styledBody.length() - 1, textColor);
+                }
+                SpannableStringBuilder builder = new SpannableStringBuilder();
+                for (CharSequence l : CharSequenceUtils.split(styledBody, '\n')) {
+                    if (l.length() > 0) {
+                        if (l.toString().equals("```")) {
+                            continue;
+                        }
+                        char first = l.charAt(0);
+                        if ((first != '>' || !isPositionFollowedByQuoteableCharacter(l, 0)) && first != '\u00bb') {
+                            CharSequence line = CharSequenceUtils.trim(l);
+                            if (line.length() == 0) {
+                                continue;
+                            }
+                            char last = line.charAt(line.length() - 1);
+                            if (builder.length() != 0) {
+                                builder.append(' ');
+                            }
+                            builder.append(line);
+                            if (!PUNCTIONATION.contains(last)) {
+                                break;
+                            }
+                        }
+                    }
+                }
+                if (builder.length() == 0) {
+                    builder.append(body.trim());
+                }
+                return new Pair<>(builder, false);
+            }
+        }
+    }
+
+    public static boolean isLastLineQuote(String body) {
+        if (body.endsWith("\n")) {
+            return false;
+        }
+        String[] lines = body.split("\n");
+        if (lines.length == 0) {
+            return false;
+        }
+        String line = lines[lines.length - 1];
+        if (line.isEmpty()) {
+            return false;
+        }
+        char first = line.charAt(0);
+        return first == '>' && isPositionFollowedByQuoteableCharacter(line, 0) || first == '\u00bb';
+    }
+
+    public static CharSequence shorten(CharSequence input) {
+        return input.length() > 256 ? StylingHelper.subSequence(input, 0, 256) : input;
+    }
+
+    public static boolean isPositionFollowedByQuoteableCharacter(CharSequence body, int pos) {
+        return !isPositionFollowedByNumber(body, pos)
+                && !isPositionFollowedByEmoticon(body, pos)
+                && !isPositionFollowedByEquals(body, pos);
+    }
+
+    private static boolean isPositionFollowedByNumber(CharSequence body, int pos) {
+        boolean previousWasNumber = false;
+        for (int i = pos + 1; i < body.length(); i++) {
+            char c = body.charAt(i);
+            if (Character.isDigit(body.charAt(i))) {
+                previousWasNumber = true;
+            } else if (previousWasNumber && (c == '.' || c == ',')) {
+                previousWasNumber = false;
+            } else {
+                return (Character.isWhitespace(c) || c == '%' || c == '+') && previousWasNumber;
+            }
+        }
+        return previousWasNumber;
+    }
+
+    private static boolean isPositionFollowedByEquals(CharSequence body, int pos) {
+        return body.length() > pos + 1 && body.charAt(pos + 1) == '=';
+    }
+
+    private static boolean isPositionFollowedByEmoticon(CharSequence body, int pos) {
+        if (body.length() <= pos + 1) {
+            return false;
+        } else {
+            final char first = body.charAt(pos + 1);
+            return first == ';'
+                    || first == ':'
+                    || closingBeforeWhitespace(body, pos + 1);
+        }
+    }
+
+    private static boolean closingBeforeWhitespace(CharSequence body, int pos) {
+        for (int i = pos; i < body.length(); ++i) {
+            final char c = body.charAt(i);
+            if (Character.isWhitespace(c)) {
+                return false;
+            } else if (c == '<' || c == '>') {
+                return body.length() == i + 1 || Character.isWhitespace(body.charAt(i + 1));
+            }
+        }
+        return false;
+    }
+
+    public static boolean isPositionFollowedByQuote(CharSequence body, int pos) {
+        if (body.length() <= pos + 1 || Character.isWhitespace(body.charAt(pos + 1))) {
+            return false;
+        }
+        boolean previousWasWhitespace = false;
+        for (int i = pos + 1; i < body.length(); i++) {
+            char c = body.charAt(i);
+            if (c == '\n' || c == '»') {
+                return false;
+            } else if (c == '«' && !previousWasWhitespace) {
+                return true;
+            } else {
+                previousWasWhitespace = Character.isWhitespace(c);
+            }
+        }
+        return false;
+    }
+
+    public static String getDisplayName(MucOptions.User user) {
+        Contact contact = user.getContact();
+        if (contact != null) {
+            return contact.getDisplayName();
+        } else {
+            final String name = user.getName();
+            if (name != null) {
+                return name;
+            }
+            final Jid realJid = user.getRealJid();
+            if (realJid != null) {
+                return JidHelper.localPartOrFallback(realJid);
+            }
+            return null;
+        }
+    }
+
+    public static String concatNames(List<MucOptions.User> users) {
+        return concatNames(users, users.size());
+    }
+
+    public static String concatNames(List<MucOptions.User> users, int max) {
+        StringBuilder builder = new StringBuilder();
+        final boolean shortNames = users.size() >= 3;
+        for (int i = 0; i < Math.min(users.size(), max); ++i) {
+            if (builder.length() != 0) {
+                builder.append(", ");
+            }
+            final String name = UIHelper.getDisplayName(users.get(i));
+            if (name != null) {
+                builder.append(shortNames ? name.split("\\s+")[0] : name);
+            }
+        }
+        return builder.toString();
+    }
+
+    public static String getFileDescriptionString(final Context context, final Message message) {
+        if (message.getType() == Message.TYPE_IMAGE) {
+            return context.getString(R.string.image);
+        }
+        final String mime = message.getMimeType();
+        if (mime == null) {
+            return context.getString(R.string.file);
+        } else if (mime.startsWith("audio/")) {
+            return context.getString(R.string.audio);
+        } else if (mime.startsWith("video/")) {
+            return context.getString(R.string.video);
+        } else if (mime.equals("image/gif")) {
+            return context.getString(R.string.gif);
+        } else if (mime.startsWith("image/")) {
+            return context.getString(R.string.image);
+        } else if (mime.contains("pdf")) {
+            return context.getString(R.string.pdf_document);
+        } else if (mime.equals("application/vnd.android.package-archive")) {
+            return context.getString(R.string.apk);
+        } else if (mime.equals(ExportBackupService.MIME_TYPE)) {
+            return context.getString(R.string.conversations_backup);
+        } else if (mime.contains("vcard")) {
+            return context.getString(R.string.vcard);
+        } else if (mime.equals("text/x-vcalendar") || mime.equals("text/calendar")) {
+            return context.getString(R.string.event);
+        } else if (mime.equals("application/epub+zip") || mime.equals("application/vnd.amazon.mobi8-ebook")) {
+            return context.getString(R.string.ebook);
+        } else if (mime.equals("application/gpx+xml")) {
+            return context.getString(R.string.gpx_track);
+        } else {
+            return mime;
+        }
+    }
+
+    public static String getMessageDisplayName(final Message message) {
+        final Conversational conversation = message.getConversation();
+        if (message.getStatus() == Message.STATUS_RECEIVED) {
+            final Contact contact = message.getContact();
+            if (conversation.getMode() == Conversation.MODE_MULTI) {
+                if (contact != null) {
+                    return contact.getDisplayName();
+                } else {
+                    return getDisplayedMucCounterpart(message.getCounterpart());
+                }
+            } else {
+                return contact != null ? contact.getDisplayName() : "";
+            }
+        } else {
+            if (conversation instanceof Conversation && conversation.getMode() == Conversation.MODE_MULTI) {
+                return ((Conversation) conversation).getMucOptions().getSelf().getName();
+            } else {
+                final Jid jid = conversation.getAccount().getJid();
+                return jid.getLocal() != null ? jid.getLocal() : jid.getDomain().toString();
+            }
+        }
+    }
+
+    public static String getMessageHint(Context context, Conversation conversation) {
+        switch (conversation.getNextEncryption()) {
+            case Message.ENCRYPTION_NONE:
+                if (Config.multipleEncryptionChoices()) {
+                    return context.getString(R.string.send_unencrypted_message);
+                } else {
+                    return context.getString(R.string.send_message_to_x, conversation.getName());
+                }
+            case Message.ENCRYPTION_AXOLOTL:
+                AxolotlService axolotlService = conversation.getAccount().getAxolotlService();
+                if (axolotlService != null && axolotlService.trustedSessionVerified(conversation)) {
+                    return context.getString(R.string.send_omemo_x509_message);
+                } else {
+                    return context.getString(R.string.send_omemo_message);
+                }
+            case Message.ENCRYPTION_PGP:
+                return context.getString(R.string.send_pgp_message);
+            default:
+                return "";
+        }
+    }
+
+    public static String getDisplayedMucCounterpart(final Jid counterpart) {
+        if (counterpart == null) {
+            return "";
+        } else if (!counterpart.isBareJid()) {
+            return counterpart.getResource().trim();
+        } else {
+            return counterpart.toString().trim();
+        }
+    }
+
+    public static boolean receivedLocationQuestion(Message message) {
+        if (message == null
+                || message.getStatus() != Message.STATUS_RECEIVED
+                || message.getType() != Message.TYPE_TEXT) {
+            return false;
+        }
+        String body = message.getBody() == null ? null : message.getBody().trim().toLowerCase(Locale.getDefault());
+        body = body.replace("?", "").replace("¿", "");
+        return LOCATION_QUESTIONS.contains(body);
+    }
+
+    public static ListItem.Tag getTagForStatus(Context context, Presence.Status status) {
+        switch (status) {
+            case CHAT:
+                return new ListItem.Tag(context.getString(R.string.presence_chat), 0xff259b24);
+            case AWAY:
+                return new ListItem.Tag(context.getString(R.string.presence_away), 0xffff9800);
+            case XA:
+                return new ListItem.Tag(context.getString(R.string.presence_xa), 0xfff44336);
+            case DND:
+                return new ListItem.Tag(context.getString(R.string.presence_dnd), 0xfff44336);
+            default:
+                return new ListItem.Tag(context.getString(R.string.presence_online), 0xff259b24);
+        }
+    }
+
+    public static String filesizeToString(long size) {
+        if (size > (1.5 * 1024 * 1024)) {
+            return Math.round(size * 1f / (1024 * 1024)) + " MiB";
+        } else if (size >= 1024) {
+            return Math.round(size * 1f / 1024) + " KiB";
+        } else {
+            return size + " B";
+        }
+    }
 }
diff --git a/src/main/res/drawable-hdpi/baseline_tour_black_48.png b/src/main/res/drawable-hdpi/baseline_tour_black_48.png
new file mode 100644
index 000000000..3652cab68
--- /dev/null
+++ b/src/main/res/drawable-hdpi/baseline_tour_black_48.png
diff --git a/src/main/res/drawable-hdpi/baseline_tour_white_48.png b/src/main/res/drawable-hdpi/baseline_tour_white_48.png
new file mode 100644
index 000000000..b1f85b798
--- /dev/null
+++ b/src/main/res/drawable-hdpi/baseline_tour_white_48.png
diff --git a/src/main/res/drawable-mdpi/baseline_tour_black_48.png b/src/main/res/drawable-mdpi/baseline_tour_black_48.png
new file mode 100644
index 000000000..10e2511d1
--- /dev/null
+++ b/src/main/res/drawable-mdpi/baseline_tour_black_48.png
diff --git a/src/main/res/drawable-mdpi/baseline_tour_white_48.png b/src/main/res/drawable-mdpi/baseline_tour_white_48.png
new file mode 100644
index 000000000..d220b1447
--- /dev/null
+++ b/src/main/res/drawable-mdpi/baseline_tour_white_48.png
diff --git a/src/main/res/drawable-xhdpi/baseline_tour_black_48.png b/src/main/res/drawable-xhdpi/baseline_tour_black_48.png
new file mode 100644
index 000000000..1cb89f437
--- /dev/null
+++ b/src/main/res/drawable-xhdpi/baseline_tour_black_48.png
diff --git a/src/main/res/drawable-xhdpi/baseline_tour_white_48.png b/src/main/res/drawable-xhdpi/baseline_tour_white_48.png
new file mode 100644
index 000000000..80dae18b6
--- /dev/null
+++ b/src/main/res/drawable-xhdpi/baseline_tour_white_48.png
diff --git a/src/main/res/drawable-xxhdpi/baseline_tour_black_48.png b/src/main/res/drawable-xxhdpi/baseline_tour_black_48.png
new file mode 100644
index 000000000..ade2fdb4d
--- /dev/null
+++ b/src/main/res/drawable-xxhdpi/baseline_tour_black_48.png
diff --git a/src/main/res/drawable-xxhdpi/baseline_tour_white_48.png b/src/main/res/drawable-xxhdpi/baseline_tour_white_48.png
new file mode 100644
index 000000000..03dc2a066
--- /dev/null
+++ b/src/main/res/drawable-xxhdpi/baseline_tour_white_48.png
diff --git a/src/main/res/drawable-xxxhdpi/baseline_tour_black_48.png b/src/main/res/drawable-xxxhdpi/baseline_tour_black_48.png
new file mode 100644
index 000000000..d5c00c8af
--- /dev/null
+++ b/src/main/res/drawable-xxxhdpi/baseline_tour_black_48.png
diff --git a/src/main/res/drawable-xxxhdpi/baseline_tour_white_48.png b/src/main/res/drawable-xxxhdpi/baseline_tour_white_48.png
new file mode 100644
index 000000000..bf6ee424c
--- /dev/null
+++ b/src/main/res/drawable-xxxhdpi/baseline_tour_white_48.png
diff --git a/src/main/res/values/attrs.xml b/src/main/res/values/attrs.xml
index e67517049..fc05b1696 100644
--- a/src/main/res/values/attrs.xml
+++ b/src/main/res/values/attrs.xml
@@ -66,6 +66,7 @@
     <attr name="media_preview_recording" format="reference" />
     <attr name="media_preview_audio" format="reference" />
     <attr name="media_preview_location" format="reference" />
+    <attr name="media_preview_tour" format="reference" />
     <attr name="media_preview_contact" format="reference" />
     <attr name="media_preview_app" format="reference" />
     <attr name="media_preview_calendar" format="reference" />
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 1e46347c6..9b6568a15 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -925,6 +925,7 @@
     <string name="could_not_switch_camera">Could not switch camera</string>
     <string name="add_to_favorites">Add to favorites</string>
     <string name="remove_from_favorites">Remove from favorites</string>
+    <string name="gpx_track">GPX track</string>
     <plurals name="view_users">
         <item quantity="one">View %1$d Participant</item>
         <item quantity="other">View %1$d Participants</item>
diff --git a/src/main/res/values/themes.xml b/src/main/res/values/themes.xml
index 8def180d8..c9d20fcd8 100644
--- a/src/main/res/values/themes.xml
+++ b/src/main/res/values/themes.xml
@@ -85,6 +85,7 @@
         <item name="media_preview_recording" type="reference">@drawable/ic_mic_black_48dp</item>
         <item name="media_preview_audio" type="reference">@drawable/ic_headset_black_48dp</item>
         <item name="media_preview_location" type="reference">@drawable/ic_room_black_48dp</item>
+        <item name="media_preview_tour" type="reference">@drawable/baseline_tour_black_48</item>
         <item name="media_preview_contact" type="reference">@drawable/ic_person_black_48dp</item>
         <item name="media_preview_app" type="reference">@drawable/ic_android_black_48dp</item>
         <item name="media_preview_calendar" type="reference">@drawable/ic_event_black_48dp</item>
@@ -240,6 +241,7 @@
         <item name="media_preview_recording" type="reference">@drawable/ic_mic_white_48dp</item>
         <item name="media_preview_audio" type="reference">@drawable/ic_headset_white_48dp</item>
         <item name="media_preview_location" type="reference">@drawable/ic_room_white_48dp</item>
+        <item name="media_preview_tour" type="reference">@drawable/baseline_tour_white_48</item>
         <item name="media_preview_contact" type="reference">@drawable/ic_person_white_48dp</item>
         <item name="media_preview_app" type="reference">@drawable/ic_android_white_48dp</item>
         <item name="media_preview_calendar" type="reference">@drawable/ic_event_white_48dp</item>