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.ColorFilter;
  8import android.graphics.Paint;
  9import android.graphics.PixelFormat;
 10import android.graphics.PorterDuff;
 11import android.graphics.PorterDuffXfermode;
 12import android.graphics.Rect;
 13import android.graphics.Typeface;
 14import android.graphics.drawable.BitmapDrawable;
 15import android.graphics.drawable.Drawable;
 16import android.net.Uri;
 17import android.text.TextUtils;
 18import android.util.DisplayMetrics;
 19import android.util.Log;
 20import android.util.LruCache;
 21
 22import androidx.annotation.ColorInt;
 23import androidx.annotation.Nullable;
 24import androidx.core.content.res.ResourcesCompat;
 25
 26import java.util.HashMap;
 27import java.util.HashSet;
 28import java.util.List;
 29import java.util.Locale;
 30import java.util.Set;
 31
 32import eu.siacs.conversations.Config;
 33import eu.siacs.conversations.R;
 34import eu.siacs.conversations.entities.Account;
 35import eu.siacs.conversations.entities.Bookmark;
 36import eu.siacs.conversations.entities.Contact;
 37import eu.siacs.conversations.entities.Conversation;
 38import eu.siacs.conversations.entities.Conversational;
 39import eu.siacs.conversations.entities.ListItem;
 40import eu.siacs.conversations.entities.Message;
 41import eu.siacs.conversations.entities.MucOptions;
 42import eu.siacs.conversations.entities.RawBlockable;
 43import eu.siacs.conversations.entities.Room;
 44import eu.siacs.conversations.persistance.FileBackend;
 45import eu.siacs.conversations.utils.UIHelper;
 46import eu.siacs.conversations.xmpp.Jid;
 47import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
 48import eu.siacs.conversations.xmpp.XmppConnection;
 49
 50public class AvatarService implements OnAdvancedStreamFeaturesLoaded {
 51
 52	private static final int FG_COLOR = 0xFFFAFAFA;
 53	private static final int TRANSPARENT = 0x00000000;
 54	private static final int PLACEHOLDER_COLOR = 0xFF202020;
 55
 56	public static final int SYSTEM_UI_AVATAR_SIZE = 48;
 57
 58	private static final String PREFIX_CONTACT = "contact";
 59	private static final String PREFIX_CONVERSATION = "conversation";
 60	private static final String PREFIX_ACCOUNT = "account";
 61	private static final String PREFIX_GENERIC = "generic";
 62
 63	private static final String CHANNEL_SYMBOL = "#";
 64
 65	final private Set<Integer> sizes = new HashSet<>();
 66	final private HashMap<String, Set<String>> conversationDependentKeys = new HashMap<>();
 67
 68	protected XmppConnectionService mXmppConnectionService = null;
 69
 70	AvatarService(XmppConnectionService service) {
 71		this.mXmppConnectionService = service;
 72	}
 73
 74	public static int getSystemUiAvatarSize(final Context context) {
 75		return (int) (SYSTEM_UI_AVATAR_SIZE * context.getResources().getDisplayMetrics().density);
 76	}
 77
 78	public Drawable get(final Avatarable avatarable, final int size, final boolean cachedOnly) {
 79		if (avatarable instanceof Account) {
 80			return get((Account) avatarable,size,cachedOnly);
 81		} else if (avatarable instanceof Conversation) {
 82			return get((Conversation) avatarable, size, cachedOnly);
 83		} else if (avatarable instanceof Message) {
 84			return get((Message) avatarable, size, cachedOnly);
 85		} else if (avatarable instanceof ListItem) {
 86			return get((ListItem) avatarable, size, cachedOnly);
 87		} else if (avatarable instanceof MucOptions.User) {
 88			return get((MucOptions.User) avatarable, size, cachedOnly);
 89		} else if (avatarable instanceof Room) {
 90			return get((Room) avatarable, size, cachedOnly);
 91		}
 92		throw new AssertionError("AvatarService does not know how to generate avatar from "+avatarable.getClass().getName());
 93
 94	}
 95
 96	private Drawable get(final Room result, final int size, boolean cacheOnly) {
 97		final Jid room = result.getRoom();
 98		Conversation conversation = room != null ? mXmppConnectionService.findFirstMuc(room) : null;
 99		if (conversation != null) {
100			return get(conversation,size,cacheOnly);
101		}
102		return get(CHANNEL_SYMBOL, room != null ? room.asBareJid().toEscapedString() : result.getName(), size, cacheOnly);
103	}
104
105	private Drawable get(final Contact contact, final int size, boolean cachedOnly) {
106		if (contact.isSelf()) {
107			return get(contact.getAccount(), size, cachedOnly);
108		}
109		final String KEY = key(contact, size);
110		Drawable avatar = this.mXmppConnectionService.getDrawableCache().get(KEY);
111		if (avatar != null || cachedOnly) {
112			return avatar;
113		}
114		if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
115			avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
116		}
117		if (avatar == null && contact.getProfilePhoto() != null) {
118			avatar = new BitmapDrawable(mXmppConnectionService.getFileBackend().cropCenterSquare(Uri.parse(contact.getProfilePhoto()), size));
119		}
120		if (avatar == null && contact.getAvatarFilename() != null) {
121			avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
122		}
123		if (avatar == null) {
124			avatar = get(contact.getDisplayName(), contact.getJid().asBareJid().toString(), size, cachedOnly);
125		}
126		if (avatar != null) this.mXmppConnectionService.getDrawableCache().put(KEY, avatar);
127		return avatar;
128	}
129
130	public Bitmap getRoundedShortcut(final MucOptions mucOptions) {
131		final DisplayMetrics metrics = mXmppConnectionService.getResources().getDisplayMetrics();
132		final int size = Math.round(metrics.density * 48);
133		final Bitmap bitmap = FileBackend.drawDrawable(get(mucOptions, size, false));
134		final Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
135		final Canvas canvas = new Canvas(output);
136		final Paint paint = new Paint();
137		drawAvatar(bitmap, canvas, paint);
138		return output;
139	}
140
141	public Bitmap getRoundedShortcut(final Contact contact) {
142		return getRoundedShortcut(contact, false);
143	}
144
145	public Bitmap getRoundedShortcutWithIcon(final Contact contact) {
146		return getRoundedShortcut(contact, true);
147	}
148
149	private Bitmap getRoundedShortcut(final Contact contact, boolean withIcon) {
150		DisplayMetrics metrics = mXmppConnectionService.getResources().getDisplayMetrics();
151		int size = Math.round(metrics.density * 48);
152		Bitmap bitmap = FileBackend.drawDrawable(get(contact, size));
153		Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
154		Canvas canvas = new Canvas(output);
155		final Paint paint = new Paint();
156
157		drawAvatar(bitmap, canvas, paint);
158		if (withIcon) {
159			drawIcon(canvas, paint);
160		}
161		return output;
162	}
163
164	private static void drawAvatar(Bitmap bitmap, Canvas canvas, Paint paint) {
165		final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
166		paint.setAntiAlias(true);
167		canvas.drawARGB(0, 0, 0, 0);
168		canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);
169		paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
170		canvas.drawBitmap(bitmap.copy(Bitmap.Config.ARGB_8888, false), rect, rect, paint);
171	}
172
173	private void drawIcon(Canvas canvas, Paint paint) {
174		final Resources resources = mXmppConnectionService.getResources();
175		final Bitmap icon = getRoundLauncherIcon(resources);
176		if (icon == null) {
177			return;
178		}
179		paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));
180
181		int iconSize = Math.round(canvas.getHeight() / 2.6f);
182
183		int left = canvas.getWidth() - iconSize;
184		int top = canvas.getHeight() - iconSize;
185		final Rect rect = new Rect(left, top, left + iconSize, top + iconSize);
186		canvas.drawBitmap(icon, null, rect, paint);
187	}
188
189	private static Bitmap getRoundLauncherIcon(Resources resources) {
190
191		final Drawable drawable = ResourcesCompat.getDrawable(resources, R.mipmap.new_launcher_round,null);
192		if (drawable == null) {
193			return null;
194		}
195
196		if (drawable instanceof BitmapDrawable) {
197			return ((BitmapDrawable)drawable).getBitmap();
198		}
199
200		Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
201		Canvas canvas = new Canvas(bitmap);
202		drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
203		drawable.draw(canvas);
204
205		return bitmap;
206	}
207
208	public Drawable get(final MucOptions.User user, final int size, boolean cachedOnly) {
209		Contact c = user.getContact();
210		if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null || user.getAvatar() == null)) {
211			return get(c, size, cachedOnly);
212		} else {
213			return getImpl(user, size, cachedOnly);
214		}
215	}
216
217	private Drawable getImpl(final MucOptions.User user, final int size, boolean cachedOnly) {
218		final String KEY = key(user, size);
219		Drawable avatar = this.mXmppConnectionService.getDrawableCache().get(KEY);
220		if (avatar != null || cachedOnly) {
221			return avatar;
222		}
223		if (user.getAvatar() != null) {
224			avatar = mXmppConnectionService.getFileBackend().getAvatar(user.getAvatar(), size);
225		}
226		if (avatar == null) {
227			Contact contact = user.getContact();
228			if (contact != null) {
229				avatar = get(contact, size, false);
230			} else {
231				String seed = user.getRealJid() != null ? user.getRealJid().asBareJid().toString() : null;
232				avatar = get(user.getNick(), seed, size, false);
233			}
234		}
235		this.mXmppConnectionService.getDrawableCache().put(KEY, avatar);
236		return avatar;
237	}
238
239	public void clear(Contact contact) {
240		synchronized (this.sizes) {
241			for (final Integer size : sizes) {
242				this.mXmppConnectionService.getDrawableCache().remove(key(contact, size));
243			}
244		}
245		for (Conversation conversation : mXmppConnectionService.findAllConferencesWith(contact)) {
246			MucOptions.User user = conversation.getMucOptions().findUserByRealJid(contact.getJid().asBareJid());
247			if (user != null) {
248				clear(user);
249			}
250			clear(conversation);
251		}
252	}
253
254	private String key(Contact contact, int size) {
255		synchronized (this.sizes) {
256			this.sizes.add(size);
257		}
258		return PREFIX_CONTACT +
259				'\0' +
260				contact.getAccount().getJid().asBareJid() +
261				'\0' +
262				emptyOnNull(contact.getJid()) +
263				'\0' +
264				size;
265	}
266
267	private String key(MucOptions.User user, int size) {
268		synchronized (this.sizes) {
269			this.sizes.add(size);
270		}
271		return PREFIX_CONTACT +
272				'\0' +
273				user.getAccount().getJid().asBareJid() +
274				'\0' +
275				user.getMuc() +
276				'\0' +
277				(user.getOccupantId() == null ? emptyOnNull(user.getFullJid()) : user.getOccupantId()) +
278				'\0' +
279				emptyOnNull(user.getRealJid()) +
280				'\0' +
281				size;
282	}
283
284	public Drawable get(ListItem item, int size) {
285		return get(item, size, false);
286	}
287
288	public Drawable get(ListItem item, int size, boolean cachedOnly) {
289		if (item instanceof RawBlockable) {
290			return get(item.getDisplayName(), item.getJid().toEscapedString(), size, cachedOnly);
291		} else if (item instanceof Contact) {
292			return get((Contact) item, size, cachedOnly);
293		} else if (item instanceof Bookmark) {
294			Bookmark bookmark = (Bookmark) item;
295			if (bookmark.getConversation() != null) {
296				return get(bookmark.getConversation(), size, cachedOnly);
297			} else {
298				Jid jid = bookmark.getJid();
299				Account account = bookmark.getAccount();
300				Contact contact = jid == null ? null : account.getRoster().getContact(jid);
301				if (contact != null && contact.getAvatarFilename() != null) {
302					return get(contact, size, cachedOnly);
303				}
304				String seed = jid != null ? jid.asBareJid().toString() : null;
305				return get(bookmark.getDisplayName(), seed, size, cachedOnly);
306			}
307		} else {
308			String seed = item.getJid() != null ? item.getJid().asBareJid().toString() : null;
309			return get(item.getDisplayName(), seed, size, cachedOnly);
310		}
311	}
312
313	public Drawable get(Conversation conversation, int size) {
314		return get(conversation, size, false);
315	}
316
317	public Drawable get(Conversation conversation, int size, boolean cachedOnly) {
318		if (conversation.getMode() == Conversation.MODE_SINGLE) {
319			return get(conversation.getContact(), size, cachedOnly);
320		} else {
321			return get(conversation.getMucOptions(), size, cachedOnly);
322		}
323	}
324
325	public void clear(Conversation conversation) {
326		if (conversation.getMode() == Conversation.MODE_SINGLE) {
327			clear(conversation.getContact());
328		} else {
329			clear(conversation.getMucOptions());
330			synchronized (this.conversationDependentKeys) {
331				Set<String> keys = this.conversationDependentKeys.get(conversation.getUuid());
332				if (keys == null) {
333					return;
334				}
335				LruCache<String, Drawable> cache = this.mXmppConnectionService.getDrawableCache();
336				for (String key : keys) {
337					cache.remove(key);
338				}
339				keys.clear();
340			}
341		}
342	}
343
344	private Drawable get(MucOptions mucOptions, int size, boolean cachedOnly) {
345		final String KEY = key(mucOptions, size);
346		Drawable bitmap = this.mXmppConnectionService.getDrawableCache().get(KEY);
347		if (bitmap != null || cachedOnly) {
348			return bitmap;
349		}
350
351		bitmap = mXmppConnectionService.getFileBackend().getAvatar(mucOptions.getAvatar(), size);
352
353		if (bitmap == null) {
354			Conversation c = mucOptions.getConversation();
355			if (mucOptions.isPrivateAndNonAnonymous()) {
356				final List<MucOptions.User> users = mucOptions.getUsersRelevantForNameAndAvatar();
357				if (users.size() == 0) {
358					bitmap = getImpl(c.getName().toString(), c.getJid().asBareJid().toString(), size);
359				} else {
360					bitmap = getImpl(users, size);
361				}
362			} else {
363				bitmap = getImpl(CHANNEL_SYMBOL, c.getJid().asBareJid().toString(), size);
364			}
365		}
366
367		this.mXmppConnectionService.getDrawableCache().put(KEY, bitmap);
368
369		return bitmap;
370	}
371
372	private Drawable get(List<MucOptions.User> users, int size, boolean cachedOnly) {
373		final String KEY = key(users, size);
374		Drawable bitmap = this.mXmppConnectionService.getDrawableCache().get(KEY);
375		if (bitmap != null || cachedOnly) {
376			return bitmap;
377		}
378		bitmap = getImpl(users, size);
379		this.mXmppConnectionService.getDrawableCache().put(KEY, bitmap);
380		return bitmap;
381	}
382
383	private Drawable getImpl(List<MucOptions.User> users, int size) {
384		int count = users.size();
385		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
386		Canvas canvas = new Canvas(bitmap);
387		bitmap.eraseColor(TRANSPARENT);
388		if (count == 0) {
389			throw new AssertionError("Unable to draw tiles for 0 users");
390		} else if (count == 1) {
391			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
392			drawTile(canvas, users.get(0).getAccount(), size / 2 + 1, 0, size, size);
393		} else if (count == 2) {
394			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
395			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size);
396		} else if (count == 3) {
397			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
398			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size / 2 - 1);
399			drawTile(canvas, users.get(2), size / 2 + 1, size / 2 + 1, size,
400					size);
401		} else if (count == 4) {
402			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
403			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
404			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
405			drawTile(canvas, users.get(3), size / 2 + 1, size / 2 + 1, size,
406					size);
407		} else {
408			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
409			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
410			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
411			drawTile(canvas, "\u2026", PLACEHOLDER_COLOR, size / 2 + 1, size / 2 + 1,
412					size, size);
413		}
414		return new BitmapDrawable(bitmap);
415	}
416
417	public void clear(final MucOptions options) {
418		if (options == null) {
419			return;
420		}
421		synchronized (this.sizes) {
422			for (Integer size : sizes) {
423				this.mXmppConnectionService.getDrawableCache().remove(key(options, size));
424			}
425		}
426	}
427
428	private String key(final MucOptions options, int size) {
429		synchronized (this.sizes) {
430			this.sizes.add(size);
431		}
432		return PREFIX_CONVERSATION + "_" + options.getConversation().getUuid() + "_" + size;
433	}
434
435	private String key(List<MucOptions.User> users, int size) {
436		final Conversation conversation = users.get(0).getConversation();
437		StringBuilder builder = new StringBuilder("TILE_");
438		builder.append(conversation.getUuid());
439
440		for (MucOptions.User user : users) {
441			builder.append("\0");
442			builder.append(emptyOnNull(user.getRealJid()));
443			builder.append("\0");
444			builder.append(emptyOnNull(user.getFullJid()));
445		}
446		builder.append('\0');
447		builder.append(size);
448		final String key = builder.toString();
449		synchronized (this.conversationDependentKeys) {
450			Set<String> keys;
451			if (this.conversationDependentKeys.containsKey(conversation.getUuid())) {
452				keys = this.conversationDependentKeys.get(conversation.getUuid());
453			} else {
454				keys = new HashSet<>();
455				this.conversationDependentKeys.put(conversation.getUuid(), keys);
456			}
457			keys.add(key);
458		}
459		return key;
460	}
461
462	public Drawable get(Account account, int size) {
463		return get(account, size, false);
464	}
465
466	public Drawable get(Account account, int size, boolean cachedOnly) {
467		final String KEY = key(account, size);
468		Drawable avatar = mXmppConnectionService.getDrawableCache().get(KEY);
469		if (avatar != null || cachedOnly) {
470			return avatar;
471		}
472		avatar = mXmppConnectionService.getFileBackend().getAvatar(account.getAvatar(), size);
473		if (avatar == null) {
474			final String displayName = account.getDisplayName();
475			final String jid = account.getJid().asBareJid().toEscapedString();
476			if (QuickConversationsService.isQuicksy() && !TextUtils.isEmpty(displayName)) {
477				avatar = get(displayName, jid, size, false);
478			} else {
479				avatar = get(jid, null, size, false);
480			}
481		}
482		mXmppConnectionService.getDrawableCache().put(KEY, avatar);
483		return avatar;
484	}
485
486	public Drawable get(Message message, int size, boolean cachedOnly) {
487		final Conversational conversation = message.getConversation();
488		if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
489			return get(message.getCounterparts(), size, cachedOnly);
490		} else if (message.getStatus() == Message.STATUS_RECEIVED) {
491			Contact c = message.getContact();
492			if (message.getModerated() != null) c = null;
493			if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null)) {
494				return get(c, size, cachedOnly);
495			} else if (conversation instanceof Conversation && message.getConversation().getMode() == Conversation.MODE_MULTI) {
496				final Jid trueCounterpart = message.getTrueCounterpart();
497				final MucOptions mucOptions = ((Conversation) conversation).getMucOptions();
498				MucOptions.User user;
499				if (trueCounterpart != null) {
500					user = mucOptions.findOrCreateUserByRealJid(trueCounterpart, message.getCounterpart(), message.getOccupantId());
501				} else if(message.getOccupantId() != null) {
502					user = mucOptions.findUserByOccupantId(message.getOccupantId(), message.getCounterpart());
503				} else {
504					user = mucOptions.findUserByFullJid(message.getCounterpart());
505				}
506				if (message.getModerated() != null) user = null;
507				if (user != null) {
508					return getImpl(user, size, cachedOnly);
509				}
510			} else if (c != null) {
511				return get(c, size, cachedOnly);
512			}
513			Jid tcp = message.getTrueCounterpart();
514			String seed = tcp != null ? tcp.asBareJid().toString() : null;
515			return get(UIHelper.getMessageDisplayName(message), seed, size, cachedOnly);
516		} else {
517			return get(conversation.getAccount(), size, cachedOnly);
518		}
519	}
520
521	public void clear(Account account) {
522		synchronized (this.sizes) {
523			for (Integer size : sizes) {
524				this.mXmppConnectionService.getDrawableCache().remove(key(account, size));
525			}
526		}
527	}
528
529	public void clear(MucOptions.User user) {
530		synchronized (this.sizes) {
531			for (Integer size : sizes) {
532				this.mXmppConnectionService.getDrawableCache().remove(key(user, size));
533			}
534		}
535	}
536
537	private String key(Account account, int size) {
538		synchronized (this.sizes) {
539			this.sizes.add(size);
540		}
541		return PREFIX_ACCOUNT + "_" + account.getUuid() + "_"
542				+ size;
543	}
544
545	/*public Bitmap get(String name, int size) {
546		return get(name,null, size,false);
547	}*/
548
549	public Drawable get(final String name, String seed, final int size, boolean cachedOnly) {
550		return getImpl(name, seed, size);
551	}
552
553	public static Drawable get(final Jid jid, final int size) {
554		return getImpl(jid.asBareJid().toEscapedString(), null, size);
555	}
556
557	private static Drawable getImpl(final String name, final String seed, final int size) {
558		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
559		Canvas canvas = new Canvas(bitmap);
560		final String trimmedName = name == null ? "" : name.trim();
561		return new TextDrawable(name, seed, size);
562	}
563
564	private String key(String name, int size) {
565		synchronized (this.sizes) {
566			this.sizes.add(size);
567		}
568		return PREFIX_GENERIC + "_" + name + "_" + size;
569	}
570
571	private static boolean drawTile(Canvas canvas, String letter, int tileColor, int left, int top, int right, int bottom) {
572		letter = letter.toUpperCase(Locale.getDefault());
573		Paint tilePaint = new Paint(), textPaint = new Paint();
574		tilePaint.setColor(tileColor);
575		textPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
576		textPaint.setColor(FG_COLOR);
577		textPaint.setTypeface(Typeface.create("sans-serif-light",
578				Typeface.NORMAL));
579		textPaint.setTextSize((float) ((right - left) * 0.8));
580		Rect rect = new Rect();
581
582		canvas.drawRect(new Rect(left, top, right, bottom), tilePaint);
583		textPaint.getTextBounds(letter, 0, 1, rect);
584		float width = textPaint.measureText(letter);
585		canvas.drawText(letter, (right + left) / 2 - width / 2, (top + bottom)
586				/ 2 + rect.height() / 2, textPaint);
587		return true;
588	}
589
590	private boolean drawTile(Canvas canvas, MucOptions.User user, int left, int top, int right, int bottom) {
591		Contact contact = user.getContact();
592		if (contact != null) {
593			Uri uri = null;
594			if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
595				uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
596			} else if (contact.getProfilePhoto() != null) {
597				uri = Uri.parse(contact.getProfilePhoto());
598			} else if (contact.getAvatarFilename() != null) {
599				uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
600			}
601			if (drawTile(canvas, uri, left, top, right, bottom)) {
602				return true;
603			}
604		} else if (user.getAvatar() != null) {
605			Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(user.getAvatar());
606			if (drawTile(canvas, uri, left, top, right, bottom)) {
607				return true;
608			}
609		}
610		if (contact != null) {
611			String seed = contact.getJid().asBareJid().toString();
612			drawTile(canvas, contact.getDisplayName(), seed, left, top, right, bottom);
613		} else {
614			String seed = user.getRealJid() == null ? null : user.getRealJid().asBareJid().toString();
615			drawTile(canvas, user.getName(), seed, left, top, right, bottom);
616		}
617		return true;
618	}
619
620	private boolean drawTile(Canvas canvas, Account account, int left, int top, int right, int bottom) {
621		String avatar = account.getAvatar();
622		if (avatar != null) {
623			Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(avatar);
624			if (uri != null) {
625				if (drawTile(canvas, uri, left, top, right, bottom)) {
626					return true;
627				}
628			}
629		}
630		String name = account.getJid().asBareJid().toString();
631		return drawTile(canvas, name, name, left, top, right, bottom);
632	}
633
634	private static boolean drawTile(Canvas canvas, String name, String seed, int left, int top, int right, int bottom) {
635		if (name != null) {
636			final String letter = name.equals(CHANNEL_SYMBOL) ? name : getFirstLetter(name);
637			final int color = UIHelper.getColorForName(seed == null ? name : seed);
638			drawTile(canvas, letter, color, left, top, right, bottom);
639			return true;
640		}
641		return false;
642	}
643
644	private static String getFirstLetter(String name) {
645		for (Character c : name.toCharArray()) {
646			if (Character.isLetterOrDigit(c)) {
647				return c.toString();
648			}
649		}
650		return "X";
651	}
652
653	private boolean drawTile(Canvas canvas, Uri uri, int left, int top, int right, int bottom) {
654		if (uri != null) {
655			Bitmap bitmap = mXmppConnectionService.getFileBackend()
656					.cropCenter(uri, bottom - top, right - left);
657			if (bitmap != null) {
658				drawTile(canvas, bitmap, left, top, right, bottom);
659				return true;
660			}
661		}
662		return false;
663	}
664
665	private boolean drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop, int dstright, int dstbottom) {
666		Rect dst = new Rect(dstleft, dsttop, dstright, dstbottom);
667		canvas.drawBitmap(bm, null, dst, null);
668		return true;
669	}
670
671	@Override
672	public void onAdvancedStreamFeaturesAvailable(Account account) {
673		XmppConnection.Features features = account.getXmppConnection().getFeatures();
674		if (features.pep() && !features.pepPersistent()) {
675			Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": has pep but is not persistent");
676			if (account.getAvatar() != null) {
677				mXmppConnectionService.republishAvatarIfNeeded(account);
678			}
679		}
680	}
681
682	private static String emptyOnNull(@Nullable Jid value) {
683		return value == null ? "" : value.toString();
684	}
685
686	public interface Avatarable {
687		@ColorInt int getAvatarBackgroundColor();
688		String getAvatarName();
689	}
690
691	public static class TextDrawable extends Drawable {
692		protected final String name;
693		protected final String seed;
694		protected final int size;
695
696		public TextDrawable(final String name, final String seed, final int size) {
697			this.name = name;
698			this.seed = seed;
699			this.size = size;
700		}
701
702		@Override
703		public void draw(Canvas canvas) {
704			final var r = getBounds();
705			drawTile(canvas, name, seed, r.left, r.top, r.right, r.bottom);
706		}
707
708		@Override
709		public void setAlpha(int alpha) {
710			// TODO?
711		}
712
713		@Override
714		public void setColorFilter(ColorFilter cf) {
715			// TODO?
716		}
717
718		@Override
719		public int getOpacity() {
720			return PixelFormat.TRANSLUCENT;
721		}
722
723		@Override
724		public int getIntrinsicWidth() {
725			return size;
726		}
727
728		@Override
729		public int getIntrinsicHeight() {
730			return size;
731		}
732	}
733}