gt: 			final List<Pattern> domainPatterns = new ArrayList<>();
context: /*
   * Copyright (c) 2018, Daniel Gultsch All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   * list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation and/or
   * other materials provided with the distribution.
   *
   * 3. Neither the name of the copyright holder nor the names of its contributors
   * may be used to endorse or promote products derived from this software without
   * specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
   * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package eu.siacs.conversations.utils;
  
  import android.annotation.TargetApi;
  import android.content.Context;
  import android.os.Build;
  import android.support.annotation.ColorInt;
  import android.text.Spannable;
  import android.text.SpannableString;
  import android.text.SpannableStringBuilder;
  import android.text.style.ForegroundColorSpan;
  import android.util.LruCache;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import eu.siacs.conversations.R;
  import eu.siacs.conversations.ui.util.StyledAttributes;
  import rocks.xmpp.addr.Jid;
  
  public class IrregularUnicodeDetector {
  
  	private static final Map<Character.UnicodeBlock, Character.UnicodeBlock> NORMALIZATION_MAP;
  	private static final LruCache<Jid, PatternTuple> CACHE = new LruCache<>(4096);
  
  	static {
  		Map<Character.UnicodeBlock, Character.UnicodeBlock> temp = new HashMap<>();
  		temp.put(Character.UnicodeBlock.LATIN_1_SUPPLEMENT, Character.UnicodeBlock.BASIC_LATIN);
  		NORMALIZATION_MAP = Collections.unmodifiableMap(temp);
  	}
  
  	private static Character.UnicodeBlock normalize(Character.UnicodeBlock in) {
  		if (NORMALIZATION_MAP.containsKey(in)) {
  			return NORMALIZATION_MAP.get(in);
  		} else {
  			return in;
  		}
  	}
  
  	public static Spannable style(Context context, Jid jid) {
  		return style(jid, StyledAttributes.getColor(context, R.attr.color_warning));
  	}
  
  	private static Spannable style(Jid jid, @ColorInt int color) {
  		PatternTuple patternTuple = find(jid);
  		SpannableStringBuilder builder = new SpannableStringBuilder();
  		if (jid.getLocal() != null && patternTuple.local != null) {
  			SpannableString local = new SpannableString(jid.getLocal());
  			colorize(local, patternTuple.local, color);
  			builder.append(local);
  			builder.append('@');
  		}
  		if (jid.getDomain() != null) {
  			String[] labels = jid.getDomain().split("\\.");
  			for (int i = 0; i < labels.length; ++i) {
  				SpannableString spannableString = new SpannableString(labels[i]);
  				colorize(spannableString, patternTuple.domain.get(i), color);
  				if (i != 0) {
  					builder.append('.');
  				}
  				builder.append(spannableString);
  			}
  		}
  		if (builder.length() != 0 && jid.getResource() != null) {
  			builder.append('/');
  			builder.append(jid.getResource());
  		}
  		return builder;
  	}
  
  	private static void colorize(SpannableString spannableString, Pattern pattern, @ColorInt int color) {
  		Matcher matcher = pattern.matcher(spannableString);
  		while (matcher.find()) {
  			if (matcher.start() < matcher.end()) {
  				spannableString.setSpan(new ForegroundColorSpan(color), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
  			}
  		}
  	}
  
  	private static Map<Character.UnicodeBlock, List<String>> mapCompat(String word) {
  		Map<Character.UnicodeBlock, List<String>> map = new HashMap<>();
  		final int length = word.length();
  		for (int offset = 0; offset < length; ) {
  			final int codePoint = word.codePointAt(offset);
  			offset += Character.charCount(codePoint);
  			if (!Character.isLetter(codePoint)) {
  				continue;
  			}
  			Character.UnicodeBlock block = normalize(Character.UnicodeBlock.of(codePoint));
  			List<String> codePoints;
  			if (map.containsKey(block)) {
  				codePoints = map.get(block);
  			} else {
  				codePoints = new ArrayList<>();
  				map.put(block, codePoints);
  			}
  			codePoints.add(String.copyValueOf(Character.toChars(codePoint)));
  		}
  		return map;
  	}
  
  	@TargetApi(Build.VERSION_CODES.N)
  	private static Map<Character.UnicodeScript, List<String>> map(String word) {
  		Map<Character.UnicodeScript, List<String>> map = new HashMap<>();
  		final int length = word.length();
  		for (int offset = 0; offset < length; ) {
  			final int codePoint = word.codePointAt(offset);
  			Character.UnicodeScript script = Character.UnicodeScript.of(codePoint);
  			if (script != Character.UnicodeScript.COMMON) {
  				List<String> codePoints;
  				if (map.containsKey(script)) {
  					codePoints = map.get(script);
  				} else {
  					codePoints = new ArrayList<>();
  					map.put(script, codePoints);
  				}
  				codePoints.add(String.copyValueOf(Character.toChars(codePoint)));
  			}
  			offset += Character.charCount(codePoint);
  		}
  		return map;
  	}
  
  	private static Set<String> eliminateFirstAndGetCodePointsCompat(Map<Character.UnicodeBlock, List<String>> map) {
  		return eliminateFirstAndGetCodePoints(map, Character.UnicodeBlock.BASIC_LATIN);
  	}
  
  	@TargetApi(Build.VERSION_CODES.N)
  	private static Set<String> eliminateFirstAndGetCodePoints(Map<Character.UnicodeScript, List<String>> map) {
  		return eliminateFirstAndGetCodePoints(map, Character.UnicodeScript.COMMON);
  	}
  
  	private static <T> Set<String> eliminateFirstAndGetCodePoints(Map<T, List<String>> map, T defaultPick) {
  		T pick = defaultPick;
  		int size = 0;
  		for (Map.Entry<T, List<String>> entry : map.entrySet()) {
  			if (entry.getValue().size() > size) {
  				size = entry.getValue().size();
  				pick = entry.getKey();
  			}
  		}
  		map.remove(pick);
  		Set<String> all = new HashSet<>();
  		for (List<String> codePoints : map.values()) {
  			all.addAll(codePoints);
  		}
  		return all;
  	}
  
  	private static Set<String> findIrregularCodePoints(String word) {
  		Set<String> codePoints;
  		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
  			codePoints = eliminateFirstAndGetCodePointsCompat(mapCompat(word));
  		} else {
  			codePoints = eliminateFirstAndGetCodePoints(map(word));
  		}
  		return codePoints;
  	}
  
  	private static PatternTuple find(Jid jid) {
  		synchronized (CACHE) {
  			PatternTuple pattern = CACHE.get(jid);
  			if (pattern != null) {
  				return pattern;
  			}
  			;
  			pattern = PatternTuple.of(jid);
  			CACHE.put(jid, pattern);
  			return pattern;
  		}
  	}
  
  	private static Pattern create(Set<String> codePoints) {
  		final StringBuilder pattern = new StringBuilder();
  		for (String codePoint : codePoints) {
  			if (pattern.length() != 0) {
  				pattern.append('|');
  			}
  			pattern.append(Pattern.quote(codePoint));
  		}
  		return Pattern.compile(pattern.toString());
  	}
  
  	private static class PatternTuple {
  		private final Pattern local;
  		private final List<Pattern> domain;
  
  		private PatternTuple(Pattern local, List<Pattern> domain) {
  			this.local = local;
  			this.domain = domain;
  		}
  
  		private static PatternTuple of(Jid jid) {
  			final Pattern localPattern;
  			if (jid.getLocal() != null) {
  				localPattern = create(findIrregularCodePoints(jid.getLocal()));
  			} else {
  				localPattern = null;
  			}
  			String domain = jid.getDomain();
  