1package eu.siacs.conversations.services;
  2
  3import android.content.Context;
  4import android.content.res.Resources;
  5import android.graphics.Bitmap;
  6import android.graphics.Canvas;
  7import android.graphics.Paint;
  8import android.graphics.PorterDuff;
  9import android.graphics.PorterDuffXfermode;
 10import android.graphics.Rect;
 11import android.graphics.Typeface;
 12import android.graphics.drawable.BitmapDrawable;
 13import android.graphics.drawable.Drawable;
 14import android.net.Uri;
 15import android.text.TextUtils;
 16import android.util.DisplayMetrics;
 17import android.util.Log;
 18import android.util.LruCache;
 19
 20import androidx.annotation.ColorInt;
 21import androidx.annotation.Nullable;
 22import androidx.core.content.res.ResourcesCompat;
 23
 24import java.util.HashMap;
 25import java.util.HashSet;
 26import java.util.List;
 27import java.util.Locale;
 28import java.util.Set;
 29
 30import eu.siacs.conversations.Config;
 31import eu.siacs.conversations.R;
 32import eu.siacs.conversations.entities.Account;
 33import eu.siacs.conversations.entities.Bookmark;
 34import eu.siacs.conversations.entities.Contact;
 35import eu.siacs.conversations.entities.Conversation;
 36import eu.siacs.conversations.entities.Conversational;
 37import eu.siacs.conversations.entities.ListItem;
 38import eu.siacs.conversations.entities.Message;
 39import eu.siacs.conversations.entities.MucOptions;
 40import eu.siacs.conversations.entities.RawBlockable;
 41import eu.siacs.conversations.entities.Room;
 42import eu.siacs.conversations.persistance.FileBackend;
 43import eu.siacs.conversations.utils.UIHelper;
 44import eu.siacs.conversations.xmpp.Jid;
 45import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
 46import eu.siacs.conversations.xmpp.XmppConnection;
 47
 48public class AvatarService implements OnAdvancedStreamFeaturesLoaded {
 49
 50	private static final int FG_COLOR = 0xFFFAFAFA;
 51	private static final int TRANSPARENT = 0x00000000;
 52	private static final int PLACEHOLDER_COLOR = 0xFF202020;
 53
 54	public static final int SYSTEM_UI_AVATAR_SIZE = 48;
 55
 56	private static final String PREFIX_CONTACT = "contact";
 57	private static final String PREFIX_CONVERSATION = "conversation";
 58	private static final String PREFIX_ACCOUNT = "account";
 59	private static final String PREFIX_GENERIC = "generic";
 60
 61	private static final String CHANNEL_SYMBOL = "#";
 62
 63	final private Set<Integer> sizes = new HashSet<>();
 64	final private HashMap<String, Set<String>> conversationDependentKeys = new HashMap<>();
 65
 66	protected XmppConnectionService mXmppConnectionService = null;
 67
 68	AvatarService(XmppConnectionService service) {
 69		this.mXmppConnectionService = service;
 70	}
 71
 72	public static int getSystemUiAvatarSize(final Context context) {
 73		return (int) (SYSTEM_UI_AVATAR_SIZE * context.getResources().getDisplayMetrics().density);
 74	}
 75
 76	public Drawable get(final Avatarable avatarable, final int size, final boolean cachedOnly) {
 77		if (avatarable instanceof Account) {
 78			return get((Account) avatarable,size,cachedOnly);
 79		} else if (avatarable instanceof Conversation) {
 80			return get((Conversation) avatarable, size, cachedOnly);
 81		} else if (avatarable instanceof Message) {
 82			return get((Message) avatarable, size, cachedOnly);
 83		} else if (avatarable instanceof ListItem) {
 84			return get((ListItem) avatarable, size, cachedOnly);
 85		} else if (avatarable instanceof MucOptions.User) {
 86			return get((MucOptions.User) avatarable, size, cachedOnly);
 87		} else if (avatarable instanceof Room) {
 88			return get((Room) avatarable, size, cachedOnly);
 89		}
 90		throw new AssertionError("AvatarService does not know how to generate avatar from "+avatarable.getClass().getName());
 91
 92	}
 93
 94	private Drawable get(final Room result, final int size, boolean cacheOnly) {
 95		final Jid room = result.getRoom();
 96		Conversation conversation = room != null ? mXmppConnectionService.findFirstMuc(room) : null;
 97		if (conversation != null) {
 98			return get(conversation,size,cacheOnly);
 99		}
100		return get(CHANNEL_SYMBOL, room != null ? room.asBareJid().toEscapedString() : result.getName(), size, cacheOnly);
101	}
102
103	private Drawable get(final Contact contact, final int size, boolean cachedOnly) {
104		if (contact.isSelf()) {
105			return get(contact.getAccount(), size, cachedOnly);
106		}
107		final String KEY = key(contact, size);
108		Drawable avatar = this.mXmppConnectionService.getDrawableCache().get(KEY);
109		if (avatar != null || cachedOnly) {
110			return avatar;
111		}
112		if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
113			avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
114		}
115		if (avatar == null && contact.getProfilePhoto() != null) {
116			avatar = new BitmapDrawable(mXmppConnectionService.getFileBackend().cropCenterSquare(Uri.parse(contact.getProfilePhoto()), size));
117		}
118		if (avatar == null && contact.getAvatarFilename() != null) {
119			avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
120		}
121		if (avatar == null) {
122			avatar = get(contact.getDisplayName(), contact.getJid().asBareJid().toString(), size, false);
123		}
124		if (avatar != null) this.mXmppConnectionService.getDrawableCache().put(KEY, avatar);
125		return avatar;
126	}
127
128	public Bitmap getRoundedShortcut(final Contact contact) {
129		return getRoundedShortcut(contact, false);
130	}
131
132	public Bitmap getRoundedShortcutWithIcon(final Contact contact) {
133		return getRoundedShortcut(contact, true);
134	}
135
136	private Bitmap getRoundedShortcut(final Contact contact, boolean withIcon) {
137		DisplayMetrics metrics = mXmppConnectionService.getResources().getDisplayMetrics();
138		int size = Math.round(metrics.density * 48);
139		Bitmap bitmap = FileBackend.drawDrawable(get(contact, size));
140		Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
141		Canvas canvas = new Canvas(output);
142		final Paint paint = new Paint();
143
144		drawAvatar(bitmap, canvas, paint);
145		if (withIcon) {
146			drawIcon(canvas, paint);
147		}
148		return output;
149	}
150
151	private void drawAvatar(Bitmap bitmap, Canvas canvas, Paint paint) {
152		final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
153		paint.setAntiAlias(true);
154		canvas.drawARGB(0, 0, 0, 0);
155		canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);
156		paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
157		canvas.drawBitmap(bitmap.copy(Bitmap.Config.ARGB_8888, false), rect, rect, paint);
158	}
159
160	private void drawIcon(Canvas canvas, Paint paint) {
161		final Resources resources = mXmppConnectionService.getResources();
162		final Bitmap icon = getRoundLauncherIcon(resources);
163		if (icon == null) {
164			return;
165		}
166		paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));
167
168		int iconSize = Math.round(canvas.getHeight() / 2.6f);
169
170		int left = canvas.getWidth() - iconSize;
171		int top = canvas.getHeight() - iconSize;
172		final Rect rect = new Rect(left, top, left + iconSize, top + iconSize);
173		canvas.drawBitmap(icon, null, rect, paint);
174	}
175
176	private static Bitmap getRoundLauncherIcon(Resources resources) {
177
178		final Drawable drawable = ResourcesCompat.getDrawable(resources, R.mipmap.new_launcher_round,null);
179		if (drawable == null) {
180			return null;
181		}
182
183		if (drawable instanceof BitmapDrawable) {
184			return ((BitmapDrawable)drawable).getBitmap();
185		}
186
187		Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
188		Canvas canvas = new Canvas(bitmap);
189		drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
190		drawable.draw(canvas);
191
192		return bitmap;
193	}
194
195	public Drawable get(final MucOptions.User user, final int size, boolean cachedOnly) {
196		Contact c = user.getContact();
197		if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null || user.getAvatar() == null)) {
198			return get(c, size, cachedOnly);
199		} else {
200			return getImpl(user, size, cachedOnly);
201		}
202	}
203
204	private Drawable getImpl(final MucOptions.User user, final int size, boolean cachedOnly) {
205		final String KEY = key(user, size);
206		Drawable avatar = this.mXmppConnectionService.getDrawableCache().get(KEY);
207		if (avatar != null || cachedOnly) {
208			return avatar;
209		}
210		if (user.getAvatar() != null) {
211			avatar = mXmppConnectionService.getFileBackend().getAvatar(user.getAvatar(), size);
212		}
213		if (avatar == null) {
214			Contact contact = user.getContact();
215			if (contact != null) {
216				avatar = get(contact, size, false);
217			} else {
218				String seed = user.getRealJid() != null ? user.getRealJid().asBareJid().toString() : null;
219				avatar = get(user.getName(), seed, size, false);
220			}
221		}
222		this.mXmppConnectionService.getDrawableCache().put(KEY, avatar);
223		return avatar;
224	}
225
226	public void clear(Contact contact) {
227		synchronized (this.sizes) {
228			for (final Integer size : sizes) {
229				this.mXmppConnectionService.getDrawableCache().remove(key(contact, size));
230			}
231		}
232		for (Conversation conversation : mXmppConnectionService.findAllConferencesWith(contact)) {
233			MucOptions.User user = conversation.getMucOptions().findUserByRealJid(contact.getJid().asBareJid());
234			if (user != null) {
235				clear(user);
236			}
237			clear(conversation);
238		}
239	}
240
241	private String key(Contact contact, int size) {
242		synchronized (this.sizes) {
243			this.sizes.add(size);
244		}
245		return PREFIX_CONTACT +
246				'\0' +
247				contact.getAccount().getJid().asBareJid() +
248				'\0' +
249				emptyOnNull(contact.getJid()) +
250				'\0' +
251				size;
252	}
253
254	private String key(MucOptions.User user, int size) {
255		synchronized (this.sizes) {
256			this.sizes.add(size);
257		}
258		return PREFIX_CONTACT +
259				'\0' +
260				user.getAccount().getJid().asBareJid() +
261				'\0' +
262				emptyOnNull(user.getFullJid()) +
263				'\0' +
264				emptyOnNull(user.getRealJid()) +
265				'\0' +
266				size;
267	}
268
269	public Drawable get(ListItem item, int size) {
270		return get(item, size, false);
271	}
272
273	public Drawable get(ListItem item, int size, boolean cachedOnly) {
274		if (item instanceof RawBlockable) {
275			return get(item.getDisplayName(), item.getJid().toEscapedString(), size, cachedOnly);
276		} else if (item instanceof Contact) {
277			return get((Contact) item, size, cachedOnly);
278		} else if (item instanceof Bookmark) {
279			Bookmark bookmark = (Bookmark) item;
280			if (bookmark.getConversation() != null) {
281				return get(bookmark.getConversation(), size, cachedOnly);
282			} else {
283				Jid jid = bookmark.getJid();
284				Account account = bookmark.getAccount();
285				Contact contact = jid == null ? null : account.getRoster().getContact(jid);
286				if (contact != null && contact.getAvatarFilename() != null) {
287					return get(contact, size, cachedOnly);
288				}
289				String seed = jid != null ? jid.asBareJid().toString() : null;
290				return get(bookmark.getDisplayName(), seed, size, cachedOnly);
291			}
292		} else {
293			String seed = item.getJid() != null ? item.getJid().asBareJid().toString() : null;
294			return get(item.getDisplayName(), seed, size, cachedOnly);
295		}
296	}
297
298	public Drawable get(Conversation conversation, int size) {
299		return get(conversation, size, false);
300	}
301
302	public Drawable get(Conversation conversation, int size, boolean cachedOnly) {
303		if (conversation.getMode() == Conversation.MODE_SINGLE) {
304			return get(conversation.getContact(), size, cachedOnly);
305		} else {
306			return get(conversation.getMucOptions(), size, cachedOnly);
307		}
308	}
309
310	public void clear(Conversation conversation) {
311		if (conversation.getMode() == Conversation.MODE_SINGLE) {
312			clear(conversation.getContact());
313		} else {
314			clear(conversation.getMucOptions());
315			synchronized (this.conversationDependentKeys) {
316				Set<String> keys = this.conversationDependentKeys.get(conversation.getUuid());
317				if (keys == null) {
318					return;
319				}
320				LruCache<String, Drawable> cache = this.mXmppConnectionService.getDrawableCache();
321				for (String key : keys) {
322					cache.remove(key);
323				}
324				keys.clear();
325			}
326		}
327	}
328
329	private Drawable get(MucOptions mucOptions, int size, boolean cachedOnly) {
330		final String KEY = key(mucOptions, size);
331		Drawable bitmap = this.mXmppConnectionService.getDrawableCache().get(KEY);
332		if (bitmap != null || cachedOnly) {
333			return bitmap;
334		}
335
336		bitmap = mXmppConnectionService.getFileBackend().getAvatar(mucOptions.getAvatar(), size);
337
338		if (bitmap == null) {
339			Conversation c = mucOptions.getConversation();
340			if (mucOptions.isPrivateAndNonAnonymous()) {
341				final List<MucOptions.User> users = mucOptions.getUsersRelevantForNameAndAvatar();
342				if (users.size() == 0) {
343					bitmap = getImpl(c.getName().toString(), c.getJid().asBareJid().toString(), size);
344				} else {
345					bitmap = getImpl(users, size);
346				}
347			} else {
348				bitmap = getImpl(CHANNEL_SYMBOL, c.getJid().asBareJid().toString(), size);
349			}
350		}
351
352		this.mXmppConnectionService.getDrawableCache().put(KEY, bitmap);
353
354		return bitmap;
355	}
356
357	private Drawable get(List<MucOptions.User> users, int size, boolean cachedOnly) {
358		final String KEY = key(users, size);
359		Drawable bitmap = this.mXmppConnectionService.getDrawableCache().get(KEY);
360		if (bitmap != null || cachedOnly) {
361			return bitmap;
362		}
363		bitmap = getImpl(users, size);
364		this.mXmppConnectionService.getDrawableCache().put(KEY, bitmap);
365		return bitmap;
366	}
367
368	private Drawable getImpl(List<MucOptions.User> users, int size) {
369		int count = users.size();
370		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
371		Canvas canvas = new Canvas(bitmap);
372		bitmap.eraseColor(TRANSPARENT);
373		if (count == 0) {
374			throw new AssertionError("Unable to draw tiles for 0 users");
375		} else if (count == 1) {
376			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
377			drawTile(canvas, users.get(0).getAccount(), size / 2 + 1, 0, size, size);
378		} else if (count == 2) {
379			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
380			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size);
381		} else if (count == 3) {
382			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
383			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size / 2 - 1);
384			drawTile(canvas, users.get(2), size / 2 + 1, size / 2 + 1, size,
385					size);
386		} else if (count == 4) {
387			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
388			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
389			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
390			drawTile(canvas, users.get(3), size / 2 + 1, size / 2 + 1, size,
391					size);
392		} else {
393			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
394			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
395			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
396			drawTile(canvas, "\u2026", PLACEHOLDER_COLOR, size / 2 + 1, size / 2 + 1,
397					size, size);
398		}
399		return new BitmapDrawable(bitmap);
400	}
401
402	public void clear(final MucOptions options) {
403		if (options == null) {
404			return;
405		}
406		synchronized (this.sizes) {
407			for (Integer size : sizes) {
408				this.mXmppConnectionService.getDrawableCache().remove(key(options, size));
409			}
410		}
411	}
412
413	private String key(final MucOptions options, int size) {
414		synchronized (this.sizes) {
415			this.sizes.add(size);
416		}
417		return PREFIX_CONVERSATION + "_" + options.getConversation().getUuid() + "_" + size;
418	}
419
420	private String key(List<MucOptions.User> users, int size) {
421		final Conversation conversation = users.get(0).getConversation();
422		StringBuilder builder = new StringBuilder("TILE_");
423		builder.append(conversation.getUuid());
424
425		for (MucOptions.User user : users) {
426			builder.append("\0");
427			builder.append(emptyOnNull(user.getRealJid()));
428			builder.append("\0");
429			builder.append(emptyOnNull(user.getFullJid()));
430		}
431		builder.append('\0');
432		builder.append(size);
433		final String key = builder.toString();
434		synchronized (this.conversationDependentKeys) {
435			Set<String> keys;
436			if (this.conversationDependentKeys.containsKey(conversation.getUuid())) {
437				keys = this.conversationDependentKeys.get(conversation.getUuid());
438			} else {
439				keys = new HashSet<>();
440				this.conversationDependentKeys.put(conversation.getUuid(), keys);
441			}
442			keys.add(key);
443		}
444		return key;
445	}
446
447	public Drawable get(Account account, int size) {
448		return get(account, size, false);
449	}
450
451	public Drawable get(Account account, int size, boolean cachedOnly) {
452		final String KEY = key(account, size);
453		Drawable avatar = mXmppConnectionService.getDrawableCache().get(KEY);
454		if (avatar != null || cachedOnly) {
455			return avatar;
456		}
457		avatar = mXmppConnectionService.getFileBackend().getAvatar(account.getAvatar(), size);
458		if (avatar == null) {
459			final String displayName = account.getDisplayName();
460			final String jid = account.getJid().asBareJid().toEscapedString();
461			if (QuickConversationsService.isQuicksy() && !TextUtils.isEmpty(displayName)) {
462				avatar = get(displayName, jid, size, false);
463			} else {
464				avatar = get(jid, null, size, false);
465			}
466		}
467		mXmppConnectionService.getDrawableCache().put(KEY, avatar);
468		return avatar;
469	}
470
471	public Drawable get(Message message, int size, boolean cachedOnly) {
472		final Conversational conversation = message.getConversation();
473		if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
474			return get(message.getCounterparts(), size, cachedOnly);
475		} else if (message.getStatus() == Message.STATUS_RECEIVED) {
476			Contact c = message.getContact();
477			if (message.getModerated() != null) c = null;
478			if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null)) {
479				return get(c, size, cachedOnly);
480			} else if (conversation instanceof Conversation && message.getConversation().getMode() == Conversation.MODE_MULTI) {
481				final Jid trueCounterpart = message.getTrueCounterpart();
482				final MucOptions mucOptions = ((Conversation) conversation).getMucOptions();
483				MucOptions.User user;
484				if (trueCounterpart != null) {
485					user = mucOptions.findOrCreateUserByRealJid(trueCounterpart, message.getCounterpart());
486				} else {
487					user = mucOptions.findUserByFullJid(message.getCounterpart());
488				}
489				if (message.getModerated() != null) user = null;
490				if (user != null) {
491					return getImpl(user, size, cachedOnly);
492				}
493			} else if (c != null) {
494				return get(c, size, cachedOnly);
495			}
496			Jid tcp = message.getTrueCounterpart();
497			String seed = tcp != null ? tcp.asBareJid().toString() : null;
498			return get(UIHelper.getMessageDisplayName(message), seed, size, cachedOnly);
499		} else {
500			return get(conversation.getAccount(), size, cachedOnly);
501		}
502	}
503
504	public void clear(Account account) {
505		synchronized (this.sizes) {
506			for (Integer size : sizes) {
507				this.mXmppConnectionService.getDrawableCache().remove(key(account, size));
508			}
509		}
510	}
511
512	public void clear(MucOptions.User user) {
513		synchronized (this.sizes) {
514			for (Integer size : sizes) {
515				this.mXmppConnectionService.getDrawableCache().remove(key(user, size));
516			}
517		}
518	}
519
520	private String key(Account account, int size) {
521		synchronized (this.sizes) {
522			this.sizes.add(size);
523		}
524		return PREFIX_ACCOUNT + "_" + account.getUuid() + "_"
525				+ size;
526	}
527
528	/*public Bitmap get(String name, int size) {
529		return get(name,null, size,false);
530	}*/
531
532	public Drawable get(final String name, String seed, final int size, boolean cachedOnly) {
533		final String KEY = key(seed == null ? name : name+"\0"+seed, size);
534		Drawable bitmap = mXmppConnectionService.getDrawableCache().get(KEY);
535		if (bitmap != null || cachedOnly) {
536			return bitmap;
537		}
538		bitmap = getImpl(name, seed, size);
539		mXmppConnectionService.getDrawableCache().put(KEY, bitmap);
540		return bitmap;
541	}
542
543	public static Drawable get(final Jid jid, final int size) {
544		return getImpl(jid.asBareJid().toEscapedString(), null, size);
545	}
546
547	private static Drawable getImpl(final String name, final String seed, final int size) {
548		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
549		Canvas canvas = new Canvas(bitmap);
550		final String trimmedName = name == null ? "" : name.trim();
551		drawTile(canvas, trimmedName, seed, 0, 0, size, size);
552		return new BitmapDrawable(bitmap);
553	}
554
555	private String key(String name, int size) {
556		synchronized (this.sizes) {
557			this.sizes.add(size);
558		}
559		return PREFIX_GENERIC + "_" + name + "_" + size;
560	}
561
562	private static boolean drawTile(Canvas canvas, String letter, int tileColor, int left, int top, int right, int bottom) {
563		letter = letter.toUpperCase(Locale.getDefault());
564		Paint tilePaint = new Paint(), textPaint = new Paint();
565		tilePaint.setColor(tileColor);
566		textPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
567		textPaint.setColor(FG_COLOR);
568		textPaint.setTypeface(Typeface.create("sans-serif-light",
569				Typeface.NORMAL));
570		textPaint.setTextSize((float) ((right - left) * 0.8));
571		Rect rect = new Rect();
572
573		canvas.drawRect(new Rect(left, top, right, bottom), tilePaint);
574		textPaint.getTextBounds(letter, 0, 1, rect);
575		float width = textPaint.measureText(letter);
576		canvas.drawText(letter, (right + left) / 2 - width / 2, (top + bottom)
577				/ 2 + rect.height() / 2, textPaint);
578		return true;
579	}
580
581	private boolean drawTile(Canvas canvas, MucOptions.User user, int left, int top, int right, int bottom) {
582		Contact contact = user.getContact();
583		if (contact != null) {
584			Uri uri = null;
585			if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
586				uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
587			} else if (contact.getProfilePhoto() != null) {
588				uri = Uri.parse(contact.getProfilePhoto());
589			} else if (contact.getAvatarFilename() != null) {
590				uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
591			}
592			if (drawTile(canvas, uri, left, top, right, bottom)) {
593				return true;
594			}
595		} else if (user.getAvatar() != null) {
596			Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(user.getAvatar());
597			if (drawTile(canvas, uri, left, top, right, bottom)) {
598				return true;
599			}
600		}
601		if (contact != null) {
602			String seed = contact.getJid().asBareJid().toString();
603			drawTile(canvas, contact.getDisplayName(), seed, left, top, right, bottom);
604		} else {
605			String seed = user.getRealJid() == null ? null : user.getRealJid().asBareJid().toString();
606			drawTile(canvas, user.getName(), seed, left, top, right, bottom);
607		}
608		return true;
609	}
610
611	private boolean drawTile(Canvas canvas, Account account, int left, int top, int right, int bottom) {
612		String avatar = account.getAvatar();
613		if (avatar != null) {
614			Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(avatar);
615			if (uri != null) {
616				if (drawTile(canvas, uri, left, top, right, bottom)) {
617					return true;
618				}
619			}
620		}
621		String name = account.getJid().asBareJid().toString();
622		return drawTile(canvas, name, name, left, top, right, bottom);
623	}
624
625	private static boolean drawTile(Canvas canvas, String name, String seed, int left, int top, int right, int bottom) {
626		if (name != null) {
627			final String letter = name.equals(CHANNEL_SYMBOL) ? name : getFirstLetter(name);
628			final int color = UIHelper.getColorForName(seed == null ? name : seed);
629			drawTile(canvas, letter, color, left, top, right, bottom);
630			return true;
631		}
632		return false;
633	}
634
635	private static String getFirstLetter(String name) {
636		for (Character c : name.toCharArray()) {
637			if (Character.isLetterOrDigit(c)) {
638				return c.toString();
639			}
640		}
641		return "X";
642	}
643
644	private boolean drawTile(Canvas canvas, Uri uri, int left, int top, int right, int bottom) {
645		if (uri != null) {
646			Bitmap bitmap = mXmppConnectionService.getFileBackend()
647					.cropCenter(uri, bottom - top, right - left);
648			if (bitmap != null) {
649				drawTile(canvas, bitmap, left, top, right, bottom);
650				return true;
651			}
652		}
653		return false;
654	}
655
656	private boolean drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop, int dstright, int dstbottom) {
657		Rect dst = new Rect(dstleft, dsttop, dstright, dstbottom);
658		canvas.drawBitmap(bm, null, dst, null);
659		return true;
660	}
661
662	@Override
663	public void onAdvancedStreamFeaturesAvailable(Account account) {
664		XmppConnection.Features features = account.getXmppConnection().getFeatures();
665		if (features.pep() && !features.pepPersistent()) {
666			Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": has pep but is not persistent");
667			if (account.getAvatar() != null) {
668				mXmppConnectionService.republishAvatarIfNeeded(account);
669			}
670		}
671	}
672
673	private static String emptyOnNull(@Nullable Jid value) {
674		return value == null ? "" : value.toString();
675	}
676
677	public interface Avatarable {
678		@ColorInt int getAvatarBackgroundColor();
679		String getAvatarName();
680	}
681}