1package eu.siacs.conversations.services;
  2
  3import android.content.Context;
  4import android.content.res.Resources;
  5import android.graphics.Bitmap;
  6import android.graphics.BitmapFactory;
  7import android.graphics.Canvas;
  8import android.graphics.Paint;
  9import android.graphics.PorterDuff;
 10import android.graphics.PorterDuffXfermode;
 11import android.graphics.Rect;
 12import android.graphics.Typeface;
 13import android.graphics.drawable.BitmapDrawable;
 14import android.graphics.drawable.Drawable;
 15import android.net.Uri;
 16import android.support.annotation.ColorInt;
 17import android.support.annotation.DrawableRes;
 18import android.support.annotation.Nullable;
 19import android.support.v4.content.res.ResourcesCompat;
 20import android.text.TextUtils;
 21import android.util.DisplayMetrics;
 22import android.util.Log;
 23import android.util.LruCache;
 24
 25import java.util.ArrayList;
 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.utils.UIHelper;
 43import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
 44import eu.siacs.conversations.xmpp.XmppConnection;
 45import eu.siacs.conversations.xmpp.pep.Avatar;
 46import rocks.xmpp.addr.Jid;
 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	final private ArrayList<Integer> sizes = new ArrayList<>();
 62	final private HashMap<String, Set<String>> conversationDependentKeys = new HashMap<>();
 63
 64	protected XmppConnectionService mXmppConnectionService = null;
 65
 66	AvatarService(XmppConnectionService service) {
 67		this.mXmppConnectionService = service;
 68	}
 69
 70	public static int getSystemUiAvatarSize(final Context context) {
 71		return (int) (SYSTEM_UI_AVATAR_SIZE * context.getResources().getDisplayMetrics().density);
 72	}
 73
 74	public Bitmap get(final Avatarable avatarable, final int size, final boolean cachedOnly) {
 75		if (avatarable instanceof Account) {
 76			return get((Account) avatarable,size,cachedOnly);
 77		} else if (avatarable instanceof Conversation) {
 78			return get((Conversation) avatarable, size, cachedOnly);
 79		} else if (avatarable instanceof Message) {
 80			return get((Message) avatarable, size, cachedOnly);
 81		} else if (avatarable instanceof ListItem) {
 82			return get((ListItem) avatarable, size, cachedOnly);
 83		} else if (avatarable instanceof MucOptions.User) {
 84			return get((MucOptions.User) avatarable, size, cachedOnly);
 85		}
 86		throw new AssertionError("AvatarService does not know how to generate avatar from "+avatarable.getClass().getName());
 87
 88	}
 89
 90	private Bitmap get(final Contact contact, final int size, boolean cachedOnly) {
 91		if (contact.isSelf()) {
 92			return get(contact.getAccount(), size, cachedOnly);
 93		}
 94		final String KEY = key(contact, size);
 95		Bitmap avatar = this.mXmppConnectionService.getBitmapCache().get(KEY);
 96		if (avatar != null || cachedOnly) {
 97			return avatar;
 98		}
 99		if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
100			avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
101		}
102		if (avatar == null && contact.getProfilePhoto() != null) {
103			avatar = mXmppConnectionService.getFileBackend().cropCenterSquare(Uri.parse(contact.getProfilePhoto()), size);
104		}
105		if (avatar == null && contact.getAvatarFilename() != null) {
106			avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
107		}
108		if (avatar == null) {
109			avatar = get(contact.getDisplayName(), contact.getJid().asBareJid().toString(), size, false);
110		}
111		this.mXmppConnectionService.getBitmapCache().put(KEY, avatar);
112		return avatar;
113	}
114
115	public Bitmap getRoundedShortcut(final Contact contact) {
116		return getRoundedShortcut(contact, false);
117	}
118
119	public Bitmap getRoundedShortcutWithIcon(final Contact contact) {
120		return getRoundedShortcut(contact, true);
121	}
122
123	private Bitmap getRoundedShortcut(final Contact contact, boolean withIcon) {
124		DisplayMetrics metrics = mXmppConnectionService.getResources().getDisplayMetrics();
125		int size = Math.round(metrics.density * 48);
126		Bitmap bitmap = get(contact, size);
127		Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
128		Canvas canvas = new Canvas(output);
129		final Paint paint = new Paint();
130
131		drawAvatar(bitmap, canvas, paint);
132		if (withIcon) {
133			drawIcon(canvas, paint);
134		}
135		return output;
136	}
137
138	private void drawAvatar(Bitmap bitmap, Canvas canvas, Paint paint) {
139		final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
140		paint.setAntiAlias(true);
141		canvas.drawARGB(0, 0, 0, 0);
142		canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);
143		paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
144		canvas.drawBitmap(bitmap, rect, rect, paint);
145	}
146
147	private void drawIcon(Canvas canvas, Paint paint) {
148		final Resources resources = mXmppConnectionService.getResources();
149		final Bitmap icon = getRoundLauncherIcon(resources);
150		if (icon == null) {
151			return;
152		}
153		paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));
154
155		int iconSize = Math.round(canvas.getHeight() / 2.6f);
156
157		int left = canvas.getWidth() - iconSize;
158		int top = canvas.getHeight() - iconSize;
159		final Rect rect = new Rect(left, top, left + iconSize, top + iconSize);
160		canvas.drawBitmap(icon, null, rect, paint);
161	}
162
163	private static Bitmap getRoundLauncherIcon(Resources resources) {
164
165		final Drawable drawable = ResourcesCompat.getDrawable(resources, R.mipmap.new_launcher_round,null);
166		if (drawable == null) {
167			return null;
168		}
169
170		if (drawable instanceof BitmapDrawable) {
171			return ((BitmapDrawable)drawable).getBitmap();
172		}
173
174		Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
175		Canvas canvas = new Canvas(bitmap);
176		drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
177		drawable.draw(canvas);
178
179		return bitmap;
180	}
181
182	public Bitmap get(final MucOptions.User user, final int size, boolean cachedOnly) {
183		Contact c = user.getContact();
184		if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null || user.getAvatar() == null)) {
185			return get(c, size, cachedOnly);
186		} else {
187			return getImpl(user, size, cachedOnly);
188		}
189	}
190
191	private Bitmap getImpl(final MucOptions.User user, final int size, boolean cachedOnly) {
192		final String KEY = key(user, size);
193		Bitmap avatar = this.mXmppConnectionService.getBitmapCache().get(KEY);
194		if (avatar != null || cachedOnly) {
195			return avatar;
196		}
197		if (user.getAvatar() != null) {
198			avatar = mXmppConnectionService.getFileBackend().getAvatar(user.getAvatar(), size);
199		}
200		if (avatar == null) {
201			Contact contact = user.getContact();
202			if (contact != null) {
203				avatar = get(contact, size, false);
204			} else {
205				String seed = user.getRealJid() != null ? user.getRealJid().asBareJid().toString() : null;
206				avatar = get(user.getName(), seed, size, false);
207			}
208		}
209		this.mXmppConnectionService.getBitmapCache().put(KEY, avatar);
210		return avatar;
211	}
212
213	public void clear(Contact contact) {
214		synchronized (this.sizes) {
215			for (Integer size : sizes) {
216				this.mXmppConnectionService.getBitmapCache().remove(
217						key(contact, size));
218			}
219		}
220		for (Conversation conversation : mXmppConnectionService.findAllConferencesWith(contact)) {
221			MucOptions.User user = conversation.getMucOptions().findUserByRealJid(contact.getJid().asBareJid());
222			if (user != null) {
223				clear(user);
224			}
225			clear(conversation);
226		}
227	}
228
229	private String key(Contact contact, int size) {
230		synchronized (this.sizes) {
231			if (!this.sizes.contains(size)) {
232				this.sizes.add(size);
233			}
234		}
235		return PREFIX_CONTACT +
236				'\0' +
237				contact.getAccount().getJid().asBareJid() +
238				'\0' +
239				emptyOnNull(contact.getJid()) +
240				'\0' +
241				size;
242	}
243
244	private String key(MucOptions.User user, int size) {
245		synchronized (this.sizes) {
246			if (!this.sizes.contains(size)) {
247				this.sizes.add(size);
248			}
249		}
250		return PREFIX_CONTACT +
251				'\0' +
252				user.getAccount().getJid().asBareJid() +
253				'\0' +
254				emptyOnNull(user.getFullJid()) +
255				'\0' +
256				emptyOnNull(user.getRealJid()) +
257				'\0' +
258				size;
259	}
260
261	public Bitmap get(ListItem item, int size) {
262		return get(item, size, false);
263	}
264
265	public Bitmap get(ListItem item, int size, boolean cachedOnly) {
266		if (item instanceof Contact) {
267			return get((Contact) item, size, cachedOnly);
268		} else if (item instanceof Bookmark) {
269			Bookmark bookmark = (Bookmark) item;
270			if (bookmark.getConversation() != null) {
271				return get(bookmark.getConversation(), size, cachedOnly);
272			} else {
273				Jid jid = bookmark.getJid();
274				Account account = bookmark.getAccount();
275				Contact contact = jid == null ? null : account.getRoster().getContact(jid);
276				if (contact != null && contact.getAvatarFilename() != null) {
277					return get(contact, size, cachedOnly);
278				}
279				String seed = jid != null ? jid.asBareJid().toString() : null;
280				return get(bookmark.getDisplayName(), seed, size, cachedOnly);
281			}
282		} else {
283			String seed = item.getJid() != null ? item.getJid().asBareJid().toString() : null;
284			return get(item.getDisplayName(), seed, size, cachedOnly);
285		}
286	}
287
288	public Bitmap get(Conversation conversation, int size) {
289		return get(conversation, size, false);
290	}
291
292	public Bitmap get(Conversation conversation, int size, boolean cachedOnly) {
293		if (conversation.getMode() == Conversation.MODE_SINGLE) {
294			return get(conversation.getContact(), size, cachedOnly);
295		} else {
296			return get(conversation.getMucOptions(), size, cachedOnly);
297		}
298	}
299
300	public void clear(Conversation conversation) {
301		if (conversation.getMode() == Conversation.MODE_SINGLE) {
302			clear(conversation.getContact());
303		} else {
304			clear(conversation.getMucOptions());
305			synchronized (this.conversationDependentKeys) {
306				Set<String> keys = this.conversationDependentKeys.get(conversation.getUuid());
307				if (keys == null) {
308					return;
309				}
310				LruCache<String, Bitmap> cache = this.mXmppConnectionService.getBitmapCache();
311				for (String key : keys) {
312					cache.remove(key);
313				}
314				keys.clear();
315			}
316		}
317	}
318
319	private Bitmap get(MucOptions mucOptions, int size, boolean cachedOnly) {
320		final String KEY = key(mucOptions, size);
321		Bitmap bitmap = this.mXmppConnectionService.getBitmapCache().get(KEY);
322		if (bitmap != null || cachedOnly) {
323			return bitmap;
324		}
325
326		bitmap = mXmppConnectionService.getFileBackend().getAvatar(mucOptions.getAvatar(), size);
327
328		if (bitmap == null) {
329			final List<MucOptions.User> users = mucOptions.getUsersRelevantForNameAndAvatar();
330			if (users.size() == 0) {
331				Conversation c = mucOptions.getConversation();
332				bitmap = getImpl(c.getName().toString(), c.getJid().asBareJid().toString(), size);
333			} else {
334				bitmap = getImpl(users, size);
335			}
336		}
337
338		this.mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
339
340		return bitmap;
341	}
342
343	private Bitmap get(List<MucOptions.User> users, int size, boolean cachedOnly) {
344		final String KEY = key(users, size);
345		Bitmap bitmap = this.mXmppConnectionService.getBitmapCache().get(KEY);
346		if (bitmap != null || cachedOnly) {
347			return bitmap;
348		}
349		bitmap = getImpl(users, size);
350		this.mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
351		return bitmap;
352	}
353
354	private Bitmap getImpl(List<MucOptions.User> users, int size) {
355		int count = users.size();
356		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
357		Canvas canvas = new Canvas(bitmap);
358		bitmap.eraseColor(TRANSPARENT);
359		if (count == 0) {
360			throw new AssertionError("Unable to draw tiles for 0 users");
361		} else if (count == 1) {
362			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
363			drawTile(canvas, users.get(0).getAccount(), size / 2 + 1, 0, size, size);
364		} else if (count == 2) {
365			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
366			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size);
367		} else if (count == 3) {
368			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
369			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size / 2 - 1);
370			drawTile(canvas, users.get(2), size / 2 + 1, size / 2 + 1, size,
371					size);
372		} else if (count == 4) {
373			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
374			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
375			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
376			drawTile(canvas, users.get(3), size / 2 + 1, size / 2 + 1, size,
377					size);
378		} else {
379			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
380			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
381			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
382			drawTile(canvas, "\u2026", PLACEHOLDER_COLOR, size / 2 + 1, size / 2 + 1,
383					size, size);
384		}
385		return bitmap;
386	}
387
388	public void clear(final MucOptions options) {
389		if (options == null) {
390			return;
391		}
392		synchronized (this.sizes) {
393			for (Integer size : sizes) {
394				this.mXmppConnectionService.getBitmapCache().remove(key(options, size));
395			}
396		}
397	}
398
399	private String key(final MucOptions options, int size) {
400		synchronized (this.sizes) {
401			if (!this.sizes.contains(size)) {
402				this.sizes.add(size);
403			}
404		}
405		return PREFIX_CONVERSATION + "_" + options.getConversation().getUuid()
406				+ "_" + String.valueOf(size);
407	}
408
409	private String key(List<MucOptions.User> users, int size) {
410		final Conversation conversation = users.get(0).getConversation();
411		StringBuilder builder = new StringBuilder("TILE_");
412		builder.append(conversation.getUuid());
413
414		for (MucOptions.User user : users) {
415			builder.append("\0");
416			builder.append(emptyOnNull(user.getRealJid()));
417			builder.append("\0");
418			builder.append(emptyOnNull(user.getFullJid()));
419		}
420		builder.append('\0');
421		builder.append(size);
422		final String key = builder.toString();
423		synchronized (this.conversationDependentKeys) {
424			Set<String> keys;
425			if (this.conversationDependentKeys.containsKey(conversation.getUuid())) {
426				keys = this.conversationDependentKeys.get(conversation.getUuid());
427			} else {
428				keys = new HashSet<>();
429				this.conversationDependentKeys.put(conversation.getUuid(), keys);
430			}
431			keys.add(key);
432		}
433		return key;
434	}
435
436	public Bitmap get(Account account, int size) {
437		return get(account, size, false);
438	}
439
440	public Bitmap get(Account account, int size, boolean cachedOnly) {
441		final String KEY = key(account, size);
442		Bitmap avatar = mXmppConnectionService.getBitmapCache().get(KEY);
443		if (avatar != null || cachedOnly) {
444			return avatar;
445		}
446		avatar = mXmppConnectionService.getFileBackend().getAvatar(account.getAvatar(), size);
447		if (avatar == null) {
448			final String displayName = account.getDisplayName();
449			final String jid = account.getJid().asBareJid().toEscapedString();
450			if (QuickConversationsService.isQuicksy() && !TextUtils.isEmpty(displayName)) {
451				avatar = get(displayName, jid, size, false);
452			} else {
453				avatar = get(jid, null, size, false);
454			}
455		}
456		mXmppConnectionService.getBitmapCache().put(KEY, avatar);
457		return avatar;
458	}
459
460	public Bitmap get(Message message, int size, boolean cachedOnly) {
461		final Conversational conversation = message.getConversation();
462		if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
463			return get(message.getCounterparts(), size, cachedOnly);
464		} else if (message.getStatus() == Message.STATUS_RECEIVED) {
465			Contact c = message.getContact();
466			if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null)) {
467				return get(c, size, cachedOnly);
468			} else if (conversation instanceof Conversation && message.getConversation().getMode() == Conversation.MODE_MULTI) {
469				final Jid trueCounterpart = message.getTrueCounterpart();
470				final MucOptions mucOptions = ((Conversation) conversation).getMucOptions();
471				MucOptions.User user;
472				if (trueCounterpart != null) {
473					user = mucOptions.findOrCreateUserByRealJid(trueCounterpart, message.getCounterpart());
474				} else {
475					user = mucOptions.findUserByFullJid(message.getCounterpart());
476				}
477				if (user != null) {
478					return getImpl(user, size, cachedOnly);
479				}
480			} else if (c != null) {
481				return get(c, size, cachedOnly);
482			}
483			Jid tcp = message.getTrueCounterpart();
484			String seed = tcp != null ? tcp.asBareJid().toString() : null;
485			return get(UIHelper.getMessageDisplayName(message), seed, size, cachedOnly);
486		} else {
487			return get(conversation.getAccount(), size, cachedOnly);
488		}
489	}
490
491	public void clear(Account account) {
492		synchronized (this.sizes) {
493			for (Integer size : sizes) {
494				this.mXmppConnectionService.getBitmapCache().remove(key(account, size));
495			}
496		}
497	}
498
499	public void clear(MucOptions.User user) {
500		synchronized (this.sizes) {
501			for (Integer size : sizes) {
502				this.mXmppConnectionService.getBitmapCache().remove(key(user, size));
503			}
504		}
505	}
506
507	private String key(Account account, int size) {
508		synchronized (this.sizes) {
509			if (!this.sizes.contains(size)) {
510				this.sizes.add(size);
511			}
512		}
513		return PREFIX_ACCOUNT + "_" + account.getUuid() + "_"
514				+ String.valueOf(size);
515	}
516
517	/*public Bitmap get(String name, int size) {
518		return get(name,null, size,false);
519	}*/
520
521	public Bitmap get(final String name, String seed, final int size, boolean cachedOnly) {
522		final String KEY = key(seed == null ? name : name+"\0"+seed, size);
523		Bitmap bitmap = mXmppConnectionService.getBitmapCache().get(KEY);
524		if (bitmap != null || cachedOnly) {
525			return bitmap;
526		}
527		bitmap = getImpl(name, seed, size);
528		mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
529		return bitmap;
530	}
531
532	public static Bitmap get(final Jid jid, final int size) {
533		return getImpl(jid.asBareJid().toEscapedString(), null, size);
534	}
535
536	private static Bitmap getImpl(final String name, final String seed, final int size) {
537		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
538		Canvas canvas = new Canvas(bitmap);
539		final String trimmedName = name == null ? "" : name.trim();
540		drawTile(canvas, trimmedName, seed, 0, 0, size, size);
541		return bitmap;
542	}
543
544	private String key(String name, int size) {
545		synchronized (this.sizes) {
546			if (!this.sizes.contains(size)) {
547				this.sizes.add(size);
548			}
549		}
550		return PREFIX_GENERIC + "_" + name + "_" + String.valueOf(size);
551	}
552
553	private static boolean drawTile(Canvas canvas, String letter, int tileColor, int left, int top, int right, int bottom) {
554		letter = letter.toUpperCase(Locale.getDefault());
555		Paint tilePaint = new Paint(), textPaint = new Paint();
556		tilePaint.setColor(tileColor);
557		textPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
558		textPaint.setColor(FG_COLOR);
559		textPaint.setTypeface(Typeface.create("sans-serif-light",
560				Typeface.NORMAL));
561		textPaint.setTextSize((float) ((right - left) * 0.8));
562		Rect rect = new Rect();
563
564		canvas.drawRect(new Rect(left, top, right, bottom), tilePaint);
565		textPaint.getTextBounds(letter, 0, 1, rect);
566		float width = textPaint.measureText(letter);
567		canvas.drawText(letter, (right + left) / 2 - width / 2, (top + bottom)
568				/ 2 + rect.height() / 2, textPaint);
569		return true;
570	}
571
572	private boolean drawTile(Canvas canvas, MucOptions.User user, int left, int top, int right, int bottom) {
573		Contact contact = user.getContact();
574		if (contact != null) {
575			Uri uri = null;
576			if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
577				uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
578			} else if (contact.getProfilePhoto() != null) {
579				uri = Uri.parse(contact.getProfilePhoto());
580			} else if (contact.getAvatarFilename() != null) {
581				uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
582			}
583			if (drawTile(canvas, uri, left, top, right, bottom)) {
584				return true;
585			}
586		} else if (user.getAvatar() != null) {
587			Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(user.getAvatar());
588			if (drawTile(canvas, uri, left, top, right, bottom)) {
589				return true;
590			}
591		}
592		if (contact != null) {
593			String seed = contact.getJid().asBareJid().toString();
594			drawTile(canvas, contact.getDisplayName(), seed, left, top, right, bottom);
595		} else {
596			String seed = user.getRealJid() == null ? null : user.getRealJid().asBareJid().toString();
597			drawTile(canvas, user.getName(), seed, left, top, right, bottom);
598		}
599		return true;
600	}
601
602	private boolean drawTile(Canvas canvas, Account account, int left, int top, int right, int bottom) {
603		String avatar = account.getAvatar();
604		if (avatar != null) {
605			Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(avatar);
606			if (uri != null) {
607				if (drawTile(canvas, uri, left, top, right, bottom)) {
608					return true;
609				}
610			}
611		}
612		String name = account.getJid().asBareJid().toString();
613		return drawTile(canvas, name, name, left, top, right, bottom);
614	}
615
616	private static boolean drawTile(Canvas canvas, String name, String seed, int left, int top, int right, int bottom) {
617		if (name != null) {
618			final String letter = getFirstLetter(name);
619			final int color = UIHelper.getColorForName(seed == null ? name : seed);
620			drawTile(canvas, letter, color, left, top, right, bottom);
621			return true;
622		}
623		return false;
624	}
625
626	private static String getFirstLetter(String name) {
627		for (Character c : name.toCharArray()) {
628			if (Character.isLetterOrDigit(c)) {
629				return c.toString();
630			}
631		}
632		return "X";
633	}
634
635	private boolean drawTile(Canvas canvas, Uri uri, int left, int top, int right, int bottom) {
636		if (uri != null) {
637			Bitmap bitmap = mXmppConnectionService.getFileBackend()
638					.cropCenter(uri, bottom - top, right - left);
639			if (bitmap != null) {
640				drawTile(canvas, bitmap, left, top, right, bottom);
641				return true;
642			}
643		}
644		return false;
645	}
646
647	private boolean drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop, int dstright, int dstbottom) {
648		Rect dst = new Rect(dstleft, dsttop, dstright, dstbottom);
649		canvas.drawBitmap(bm, null, dst, null);
650		return true;
651	}
652
653	@Override
654	public void onAdvancedStreamFeaturesAvailable(Account account) {
655		XmppConnection.Features features = account.getXmppConnection().getFeatures();
656		if (features.pep() && !features.pepPersistent()) {
657			Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": has pep but is not persistent");
658			if (account.getAvatar() != null) {
659				mXmppConnectionService.republishAvatarIfNeeded(account);
660			}
661		}
662	}
663
664	private static String emptyOnNull(@Nullable Jid value) {
665		return value == null ? "" : value.toString();
666	}
667
668	public interface Avatarable {
669		@ColorInt int getAvatarBackgroundColor();
670	}
671}