src/com/android/mail/browse/SendersView.java - platform/packages/apps/UnifiedEmail - Gitiles

 /*
  * Copyright (C) 2012 Google Inc.
  * Licensed to The Android Open Source Project.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.mail.browse;

 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.res.Resources;
 import android.graphics.Typeface;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
 import android.text.TextUtils;
 import android.text.style.CharacterStyle;
 import android.text.style.TextAppearanceSpan;
 import android.text.util.Rfc822Token;
 import android.text.util.Rfc822Tokenizer;

 import com.android.mail.R;
 import com.android.mail.providers.Address;
 import com.android.mail.providers.Conversation;
 import com.android.mail.providers.ConversationInfo;
 import com.android.mail.providers.MessageInfo;
 import com.android.mail.providers.UIProvider;
 import com.android.mail.ui.DividedImageCanvas;
 import com.android.mail.utils.ObjectCache;
 import com.google.common.base.Objects;
 import com.google.common.collect.Maps;

 import java.util.ArrayList;
 import java.util.Locale;
 import java.util.Map;

 import java.util.regex.Pattern;

 public class SendersView {
     public static final int DEFAULT_FORMATTING = 0;
     public static final int MERGED_FORMATTING = 1;
     private static final Integer DOES_NOT_EXIST = -5;
     private static String sSendersSplitToken;
     public static String SENDERS_VERSION_SEPARATOR = "^**^";
     public static Pattern SENDERS_VERSION_SEPARATOR_PATTERN = Pattern.compile("\\^\\*\\*\\^");
     private static CharSequence sDraftSingularString;
     private static CharSequence sDraftPluralString;
     private static CharSequence sSendingString;
     private static String sDraftCountFormatString;
     private static CharacterStyle sDraftsStyleSpan;
     private static CharacterStyle sSendingStyleSpan;
     private static TextAppearanceSpan sUnreadStyleSpan;
     private static CharacterStyle sReadStyleSpan;
     private static String sMeString;
     private static Locale sMeStringLocale;
     private static String sMessageCountSpacerString;
     public static CharSequence sElidedString;
     private static BroadcastReceiver sConfigurationChangedReceiver;
     private static TextAppearanceSpan sMessageInfoReadStyleSpan;
     private static TextAppearanceSpan sMessageInfoUnreadStyleSpan;

     // We only want to have at most 2 Priority to length maps.  This will handle the case where
     // there is a widget installed on the launcher while the user is scrolling in the app
     private static final int MAX_PRIORITY_LENGTH_MAP_LIST = 2;

     // Cache of priority to length maps.  We can't just use a single instance as it may be
     // modified from different threads
     private static final ObjectCache<Map<Integer, Integer>> PRIORITY_LENGTH_MAP_CACHE =
             new ObjectCache<Map<Integer, Integer>>(
                     new ObjectCache.Callback<Map<Integer, Integer>>() {
                         @Override
                         public Map<Integer, Integer> newInstance() {
                             return Maps.newHashMap();
                         }
                         @Override
                         public void onObjectReleased(Map<Integer, Integer> object) {
                             object.clear();
                         }
                     }, MAX_PRIORITY_LENGTH_MAP_LIST);

     public static Typeface getTypeface(boolean isUnread) {
         return isUnread ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT;
     }

     private static void getSenderResources(Context context) {
         if (sConfigurationChangedReceiver == null) {
             sConfigurationChangedReceiver = new BroadcastReceiver() {
                 @Override
                 public void onReceive(Context context, Intent intent) {
                     sDraftSingularString = null;
                     getSenderResources(context);
                 }
             };
             context.registerReceiver(sConfigurationChangedReceiver, new IntentFilter(
                     Intent.ACTION_CONFIGURATION_CHANGED));
         }
         if (sDraftSingularString == null) {
             Resources res = context.getResources();
             sSendersSplitToken = res.getString(R.string.senders_split_token);
             sElidedString = res.getString(R.string.senders_elided);
             sDraftSingularString = res.getQuantityText(R.plurals.draft, 1);
             sDraftPluralString = res.getQuantityText(R.plurals.draft, 2);
             sDraftCountFormatString = res.getString(R.string.draft_count_format);
             sMessageInfoUnreadStyleSpan = new TextAppearanceSpan(context,
                     R.style.MessageInfoUnreadTextAppearance);
             sMessageInfoReadStyleSpan = new TextAppearanceSpan(context,
                     R.style.MessageInfoReadTextAppearance);
             sDraftsStyleSpan = new TextAppearanceSpan(context, R.style.DraftTextAppearance);
             sUnreadStyleSpan = new TextAppearanceSpan(context, R.style.SendersUnreadTextAppearance);
             sSendingStyleSpan = new TextAppearanceSpan(context, R.style.SendingTextAppearance);
             sReadStyleSpan = new TextAppearanceSpan(context, R.style.SendersReadTextAppearance);
             sMessageCountSpacerString = res.getString(R.string.message_count_spacer);
             sSendingString = res.getString(R.string.sending);
         }
     }

     public static SpannableStringBuilder createMessageInfo(Context context, Conversation conv) {
         ConversationInfo conversationInfo = conv.conversationInfo;
         int sendingStatus = conv.sendingState;
         SpannableStringBuilder messageInfo = new SpannableStringBuilder();
         boolean hasSenders = false;
         // This covers the case where the sender is "me" and this is a draft
         // message, which means this will only run once most of the time.
         for (MessageInfo m : conversationInfo.messageInfos) {
             if (!TextUtils.isEmpty(m.sender)) {
                 hasSenders = true;
                 break;
             }
         }
         getSenderResources(context);
         if (conversationInfo != null) {
             int count = conversationInfo.messageCount;
             int draftCount = conversationInfo.draftCount;
             boolean showSending = sendingStatus == UIProvider.ConversationSendingState.SENDING;
             if (count > 1) {
                 messageInfo.append(count + "");
             }
             messageInfo.setSpan(CharacterStyle.wrap(
                     conv.read ? sMessageInfoReadStyleSpan : sMessageInfoUnreadStyleSpan),
                     0, messageInfo.length(), 0);
             if (draftCount > 0) {
                 // If we are showing a message count or any draft text and there
                 // is at least 1 sender, prepend the sending state text with a
                 // comma.
                 if (hasSenders || count > 1) {
                     messageInfo.append(sSendersSplitToken);
                 }
                 SpannableStringBuilder draftString = new SpannableStringBuilder();
                 if (draftCount == 1) {
                     draftString.append(sDraftSingularString);
                 } else {
                     draftString.append(sDraftPluralString
                             + String.format(sDraftCountFormatString, draftCount));
                 }
                 draftString.setSpan(CharacterStyle.wrap(sDraftsStyleSpan), 0, draftString.length(),
                         Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                 messageInfo.append(draftString);
             }
             if (showSending) {
                 // If we are showing a message count or any draft text, prepend
                 // the sending state text with a comma.
                 if (count > 1 || draftCount > 0) {
                     messageInfo.append(sSendersSplitToken);
                 }
                 SpannableStringBuilder sending = new SpannableStringBuilder();
                 sending.append(sSendingString);
                 sending.setSpan(sSendingStyleSpan, 0, sending.length(), 0);
                 messageInfo.append(sending);
             }
             // Prepend a space if we are showing other message info text.
             if (count > 1 || (draftCount > 0 && hasSenders) || showSending) {
                 messageInfo = new SpannableStringBuilder(sMessageCountSpacerString)
                         .append(messageInfo);
             }
         }
         return messageInfo;
     }

     public static void format(Context context, ConversationInfo conversationInfo,
             String messageInfo, int maxChars, ArrayList<SpannableString> styledSenders,
             ArrayList<String> displayableSenderNames, ArrayList<String> displayableSenderEmails,
             String account) {
         getSenderResources(context);
         handlePriority(context, maxChars, messageInfo, conversationInfo, styledSenders,
                 displayableSenderNames, displayableSenderEmails, account);
     }

     public static void handlePriority(Context context, int maxChars, String messageInfoString,
             ConversationInfo conversationInfo, ArrayList<SpannableString> styledSenders,
             ArrayList<String> displayableSenderNames, ArrayList<String> displayableSenderEmails,
             String account) {
         boolean shouldAddPhotos = displayableSenderEmails != null;
         int maxPriorityToInclude = -1; // inclusive
         int numCharsUsed = messageInfoString.length(); // draft, number drafts,
                                                        // count
         int numSendersUsed = 0;
         int numCharsToRemovePerWord = 0;
         int maxFoundPriority = 0;
         if (numCharsUsed > maxChars) {
             numCharsToRemovePerWord = numCharsUsed - maxChars;
         }

         final Map<Integer, Integer> priorityToLength = PRIORITY_LENGTH_MAP_CACHE.get();
         try {
             priorityToLength.clear();
             int senderLength;
             for (MessageInfo info : conversationInfo.messageInfos) {
                 senderLength = !TextUtils.isEmpty(info.sender) ? info.sender.length() : 0;
                 priorityToLength.put(info.priority, senderLength);
                 maxFoundPriority = Math.max(maxFoundPriority, info.priority);
             }
             while (maxPriorityToInclude < maxFoundPriority) {
                 if (priorityToLength.containsKey(maxPriorityToInclude + 1)) {
                     int length = numCharsUsed + priorityToLength.get(maxPriorityToInclude + 1);
                     if (numCharsUsed > 0)
                         length += 2;
                     // We must show at least two senders if they exist. If we don't
                     // have space for both
                     // then we will truncate names.
                     if (length > maxChars && numSendersUsed >= 2) {
                         break;
                     }
                     numCharsUsed = length;
                     numSendersUsed++;
                 }
                 maxPriorityToInclude++;
             }
         } finally {
             PRIORITY_LENGTH_MAP_CACHE.release(priorityToLength);
         }
         // We want to include this entry if
         // 1) The onlyShowUnread flags is not set
         // 2) The above flag is set, and the message is unread
         MessageInfo currentMessage;
         SpannableString spannableDisplay;
         String nameString;
         CharacterStyle style;
         boolean appendedElided = false;
         Map<String, Integer> displayHash = Maps.newHashMap();
         String firstDisplayableSenderEmail = null;
         String firstDisplayableSender = null;
         for (int i = 0; i < conversationInfo.messageInfos.size(); i++) {
             currentMessage = conversationInfo.messageInfos.get(i);
             nameString = !TextUtils.isEmpty(currentMessage.sender) ? currentMessage.sender : "";
             if (nameString.length() == 0) {
                 nameString = getMe(context);
             }
             if (numCharsToRemovePerWord != 0) {
                 nameString = nameString.substring(0,
                         Math.max(nameString.length() - numCharsToRemovePerWord, 0));
             }
             final int priority = currentMessage.priority;
             style = !currentMessage.read ? getUnreadStyleSpan() : getReadStyleSpan();
             if (priority <= maxPriorityToInclude) {
                 spannableDisplay = new SpannableString(nameString);
                 // Don't duplicate senders; leave the first instance, unless the
                 // current instance is also unread.
                 int oldPos = displayHash.containsKey(currentMessage.sender) ? displayHash
                         .get(currentMessage.sender) : DOES_NOT_EXIST;
                 // If this sender doesn't exist OR the current message is
                 // unread, add the sender.
                 if (oldPos == DOES_NOT_EXIST || !currentMessage.read) {
                     // If the sender entry already existed, and is right next to the
                     // current sender, remove the old entry.
                     if (oldPos != DOES_NOT_EXIST && i > 0 && oldPos == i - 1
                             && oldPos < styledSenders.size()) {
                         // Remove the old one!
                         styledSenders.set(oldPos, null);
                         if (shouldAddPhotos && !TextUtils.isEmpty(currentMessage.senderEmail)) {
                             displayableSenderEmails.remove(currentMessage.senderEmail);
                             displayableSenderNames.remove(currentMessage.sender);
                         }
                     }
                     displayHash.put(currentMessage.sender, i);
                     spannableDisplay.setSpan(style, 0, spannableDisplay.length(), 0);
                     styledSenders.add(spannableDisplay);
                 }
             } else {
                 if (!appendedElided) {
                     spannableDisplay = new SpannableString(sElidedString);
                     spannableDisplay.setSpan(style, 0, spannableDisplay.length(), 0);
                     appendedElided = true;
                     styledSenders.add(spannableDisplay);
                 }
             }
             if (shouldAddPhotos) {
                 String senderEmail = TextUtils.isEmpty(currentMessage.sender) ?
                         account :
                             TextUtils.isEmpty(currentMessage.senderEmail) ?
                                     currentMessage.sender : currentMessage.senderEmail;
                 if (i == 0) {
                     // Always add the first sender!
                     firstDisplayableSenderEmail = senderEmail;
                     firstDisplayableSender = currentMessage.sender;
                 } else {
                     if (!Objects.equal(firstDisplayableSenderEmail, senderEmail)) {
                         int indexOf = displayableSenderEmails.indexOf(senderEmail);
                         if (indexOf > -1) {
                             displayableSenderEmails.remove(indexOf);
                             displayableSenderNames.remove(indexOf);
                         }
                         displayableSenderEmails.add(senderEmail);
                         displayableSenderNames.add(currentMessage.sender);
                         if (displayableSenderEmails.size() > DividedImageCanvas.MAX_DIVISIONS) {
                             displayableSenderEmails.remove(0);
                             displayableSenderNames.remove(0);
                         }
                     }
                 }
             }
         }
         if (shouldAddPhotos && !TextUtils.isEmpty(firstDisplayableSenderEmail)) {
             if (displayableSenderEmails.size() < DividedImageCanvas.MAX_DIVISIONS) {
                 displayableSenderEmails.add(0, firstDisplayableSenderEmail);
                 displayableSenderNames.add(0, firstDisplayableSender);
             } else {
                 displayableSenderEmails.set(0, firstDisplayableSenderEmail);
                 displayableSenderNames.set(0, firstDisplayableSender);
             }
         }
     }

     private static CharacterStyle getUnreadStyleSpan() {
         return CharacterStyle.wrap(sUnreadStyleSpan);
     }

     private static CharacterStyle getReadStyleSpan() {
         return CharacterStyle.wrap(sReadStyleSpan);
     }

     static String getMe(Context context) {
         final Resources resources = context.getResources();
         final Locale locale = resources.getConfiguration().locale;

         if (sMeString == null || !locale.equals(sMeStringLocale)) {
             sMeString = resources.getString(R.string.me);
             sMeStringLocale = locale;
         }
         return sMeString;
     }

     private static void formatDefault(ConversationItemViewModel header, String sendersString,
             Context context) {
         getSenderResources(context);
         // Clear any existing sender fragments; we must re-make all of them.
         header.senderFragments.clear();
         String[] senders = TextUtils.split(sendersString, Address.ADDRESS_DELIMETER);
         String[] namesOnly = new String[senders.length];
         Rfc822Token[] senderTokens;
         String display;
         for (int i = 0; i < senders.length; i++) {
             senderTokens = Rfc822Tokenizer.tokenize(senders[i]);
             if (senderTokens != null && senderTokens.length > 0) {
                 display = senderTokens[0].getName();
                 if (TextUtils.isEmpty(display)) {
                     display = senderTokens[0].getAddress();
                 }
                 namesOnly[i] = display;
             }
         }
         generateSenderFragments(header, namesOnly);
     }

     private static void generateSenderFragments(ConversationItemViewModel header, String[] names) {
         header.sendersText = TextUtils.join(Address.ADDRESS_DELIMETER + " ", names);
         header.addSenderFragment(0, header.sendersText.length(), getReadStyleSpan(), true);
     }

     public static void formatSenders(ConversationItemViewModel header, Context context) {
         formatDefault(header, header.conversation.senders, context);
     }
 }
	/*
	* Copyright (C) 2012 Google Inc.
	* Licensed to The Android Open Source Project.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.mail.browse;

	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.res.Resources;
	import android.graphics.Typeface;
	import android.text.Spannable;
	import android.text.SpannableString;
	import android.text.SpannableStringBuilder;
	import android.text.TextUtils;
	import android.text.style.CharacterStyle;
	import android.text.style.TextAppearanceSpan;
	import android.text.util.Rfc822Token;
	import android.text.util.Rfc822Tokenizer;

	import com.android.mail.R;
	import com.android.mail.providers.Address;
	import com.android.mail.providers.Conversation;
	import com.android.mail.providers.ConversationInfo;
	import com.android.mail.providers.MessageInfo;
	import com.android.mail.providers.UIProvider;
	import com.android.mail.ui.DividedImageCanvas;
	import com.android.mail.utils.ObjectCache;
	import com.google.common.base.Objects;
	import com.google.common.collect.Maps;

	import java.util.ArrayList;
	import java.util.Locale;
	import java.util.Map;

	import java.util.regex.Pattern;

	public class SendersView {
	public static final int DEFAULT_FORMATTING = 0;
	public static final int MERGED_FORMATTING = 1;
	private static final Integer DOES_NOT_EXIST = -5;
	private static String sSendersSplitToken;
	public static String SENDERS_VERSION_SEPARATOR = "^**^";
	public static Pattern SENDERS_VERSION_SEPARATOR_PATTERN = Pattern.compile("\\^\\\\\\^");
	private static CharSequence sDraftSingularString;
	private static CharSequence sDraftPluralString;
	private static CharSequence sSendingString;
	private static String sDraftCountFormatString;
	private static CharacterStyle sDraftsStyleSpan;
	private static CharacterStyle sSendingStyleSpan;
	private static TextAppearanceSpan sUnreadStyleSpan;
	private static CharacterStyle sReadStyleSpan;
	private static String sMeString;
	private static Locale sMeStringLocale;
	private static String sMessageCountSpacerString;
	public static CharSequence sElidedString;
	private static BroadcastReceiver sConfigurationChangedReceiver;
	private static TextAppearanceSpan sMessageInfoReadStyleSpan;
	private static TextAppearanceSpan sMessageInfoUnreadStyleSpan;

	// We only want to have at most 2 Priority to length maps. This will handle the case where
	// there is a widget installed on the launcher while the user is scrolling in the app
	private static final int MAX_PRIORITY_LENGTH_MAP_LIST = 2;

	// Cache of priority to length maps. We can't just use a single instance as it may be
	// modified from different threads
	private static final ObjectCache<Map<Integer, Integer>> PRIORITY_LENGTH_MAP_CACHE =
	new ObjectCache<Map<Integer, Integer>>(
	new ObjectCache.Callback<Map<Integer, Integer>>() {
	@Override
	public Map<Integer, Integer> newInstance() {
	return Maps.newHashMap();
	}
	@Override
	public void onObjectReleased(Map<Integer, Integer> object) {
	object.clear();
	}
	}, MAX_PRIORITY_LENGTH_MAP_LIST);

	public static Typeface getTypeface(boolean isUnread) {
	return isUnread ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT;
	}

	private static void getSenderResources(Context context) {
	if (sConfigurationChangedReceiver == null) {
	sConfigurationChangedReceiver = new BroadcastReceiver() {
	@Override
	public void onReceive(Context context, Intent intent) {
	sDraftSingularString = null;
	getSenderResources(context);
	}
	};
	context.registerReceiver(sConfigurationChangedReceiver, new IntentFilter(
	Intent.ACTION_CONFIGURATION_CHANGED));
	}
	if (sDraftSingularString == null) {
	Resources res = context.getResources();
	sSendersSplitToken = res.getString(R.string.senders_split_token);
	sElidedString = res.getString(R.string.senders_elided);
	sDraftSingularString = res.getQuantityText(R.plurals.draft, 1);
	sDraftPluralString = res.getQuantityText(R.plurals.draft, 2);
	sDraftCountFormatString = res.getString(R.string.draft_count_format);
	sMessageInfoUnreadStyleSpan = new TextAppearanceSpan(context,
	R.style.MessageInfoUnreadTextAppearance);
	sMessageInfoReadStyleSpan = new TextAppearanceSpan(context,
	R.style.MessageInfoReadTextAppearance);
	sDraftsStyleSpan = new TextAppearanceSpan(context, R.style.DraftTextAppearance);
	sUnreadStyleSpan = new TextAppearanceSpan(context, R.style.SendersUnreadTextAppearance);
	sSendingStyleSpan = new TextAppearanceSpan(context, R.style.SendingTextAppearance);
	sReadStyleSpan = new TextAppearanceSpan(context, R.style.SendersReadTextAppearance);
	sMessageCountSpacerString = res.getString(R.string.message_count_spacer);
	sSendingString = res.getString(R.string.sending);
	}
	}

	public static SpannableStringBuilder createMessageInfo(Context context, Conversation conv) {
	ConversationInfo conversationInfo = conv.conversationInfo;
	int sendingStatus = conv.sendingState;
	SpannableStringBuilder messageInfo = new SpannableStringBuilder();
	boolean hasSenders = false;
	// This covers the case where the sender is "me" and this is a draft
	// message, which means this will only run once most of the time.
	for (MessageInfo m : conversationInfo.messageInfos) {
	if (!TextUtils.isEmpty(m.sender)) {
	hasSenders = true;
	break;
	}
	}
	getSenderResources(context);
	if (conversationInfo != null) {
	int count = conversationInfo.messageCount;
	int draftCount = conversationInfo.draftCount;
	boolean showSending = sendingStatus == UIProvider.ConversationSendingState.SENDING;
	if (count > 1) {
	messageInfo.append(count + "");
	}
	messageInfo.setSpan(CharacterStyle.wrap(
	conv.read ? sMessageInfoReadStyleSpan : sMessageInfoUnreadStyleSpan),
	0, messageInfo.length(), 0);
	if (draftCount > 0) {
	// If we are showing a message count or any draft text and there
	// is at least 1 sender, prepend the sending state text with a
	// comma.
	if (hasSenders \|\| count > 1) {
	messageInfo.append(sSendersSplitToken);
	}
	SpannableStringBuilder draftString = new SpannableStringBuilder();
	if (draftCount == 1) {
	draftString.append(sDraftSingularString);
	} else {
	draftString.append(sDraftPluralString
	+ String.format(sDraftCountFormatString, draftCount));
	}
	draftString.setSpan(CharacterStyle.wrap(sDraftsStyleSpan), 0, draftString.length(),
	Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
	messageInfo.append(draftString);
	}
	if (showSending) {
	// If we are showing a message count or any draft text, prepend
	// the sending state text with a comma.
	if (count > 1 \|\| draftCount > 0) {
	messageInfo.append(sSendersSplitToken);
	}
	SpannableStringBuilder sending = new SpannableStringBuilder();
	sending.append(sSendingString);
	sending.setSpan(sSendingStyleSpan, 0, sending.length(), 0);
	messageInfo.append(sending);
	}
	// Prepend a space if we are showing other message info text.
	if (count > 1 \|\| (draftCount > 0 && hasSenders) \|\| showSending) {
	messageInfo = new SpannableStringBuilder(sMessageCountSpacerString)
	.append(messageInfo);
	}
	}
	return messageInfo;
	}

	public static void format(Context context, ConversationInfo conversationInfo,
	String messageInfo, int maxChars, ArrayList<SpannableString> styledSenders,
	ArrayList<String> displayableSenderNames, ArrayList<String> displayableSenderEmails,
	String account) {
	getSenderResources(context);
	handlePriority(context, maxChars, messageInfo, conversationInfo, styledSenders,
	displayableSenderNames, displayableSenderEmails, account);
	}

	public static void handlePriority(Context context, int maxChars, String messageInfoString,
	ConversationInfo conversationInfo, ArrayList<SpannableString> styledSenders,
	ArrayList<String> displayableSenderNames, ArrayList<String> displayableSenderEmails,
	String account) {
	boolean shouldAddPhotos = displayableSenderEmails != null;
	int maxPriorityToInclude = -1; // inclusive
	int numCharsUsed = messageInfoString.length(); // draft, number drafts,
	// count
	int numSendersUsed = 0;
	int numCharsToRemovePerWord = 0;
	int maxFoundPriority = 0;
	if (numCharsUsed > maxChars) {
	numCharsToRemovePerWord = numCharsUsed - maxChars;
	}

	final Map<Integer, Integer> priorityToLength = PRIORITY_LENGTH_MAP_CACHE.get();
	try {
	priorityToLength.clear();
	int senderLength;
	for (MessageInfo info : conversationInfo.messageInfos) {
	senderLength = !TextUtils.isEmpty(info.sender) ? info.sender.length() : 0;
	priorityToLength.put(info.priority, senderLength);
	maxFoundPriority = Math.max(maxFoundPriority, info.priority);
	}
	while (maxPriorityToInclude < maxFoundPriority) {
	if (priorityToLength.containsKey(maxPriorityToInclude + 1)) {
	int length = numCharsUsed + priorityToLength.get(maxPriorityToInclude + 1);
	if (numCharsUsed > 0)
	length += 2;
	// We must show at least two senders if they exist. If we don't
	// have space for both
	// then we will truncate names.
	if (length > maxChars && numSendersUsed >= 2) {
	break;
	}
	numCharsUsed = length;
	numSendersUsed++;
	}
	maxPriorityToInclude++;
	}
	} finally {
	PRIORITY_LENGTH_MAP_CACHE.release(priorityToLength);
	}
	// We want to include this entry if
	// 1) The onlyShowUnread flags is not set
	// 2) The above flag is set, and the message is unread
	MessageInfo currentMessage;
	SpannableString spannableDisplay;
	String nameString;
	CharacterStyle style;
	boolean appendedElided = false;
	Map<String, Integer> displayHash = Maps.newHashMap();
	String firstDisplayableSenderEmail = null;
	String firstDisplayableSender = null;
	for (int i = 0; i < conversationInfo.messageInfos.size(); i++) {
	currentMessage = conversationInfo.messageInfos.get(i);
	nameString = !TextUtils.isEmpty(currentMessage.sender) ? currentMessage.sender : "";
	if (nameString.length() == 0) {
	nameString = getMe(context);
	}
	if (numCharsToRemovePerWord != 0) {
	nameString = nameString.substring(0,
	Math.max(nameString.length() - numCharsToRemovePerWord, 0));
	}
	final int priority = currentMessage.priority;
	style = !currentMessage.read ? getUnreadStyleSpan() : getReadStyleSpan();
	if (priority <= maxPriorityToInclude) {
	spannableDisplay = new SpannableString(nameString);
	// Don't duplicate senders; leave the first instance, unless the
	// current instance is also unread.
	int oldPos = displayHash.containsKey(currentMessage.sender) ? displayHash
	.get(currentMessage.sender) : DOES_NOT_EXIST;
	// If this sender doesn't exist OR the current message is
	// unread, add the sender.
	if (oldPos == DOES_NOT_EXIST \|\| !currentMessage.read) {
	// If the sender entry already existed, and is right next to the
	// current sender, remove the old entry.
	if (oldPos != DOES_NOT_EXIST && i > 0 && oldPos == i - 1
	&& oldPos < styledSenders.size()) {
	// Remove the old one!
	styledSenders.set(oldPos, null);
	if (shouldAddPhotos && !TextUtils.isEmpty(currentMessage.senderEmail)) {
	displayableSenderEmails.remove(currentMessage.senderEmail);
	displayableSenderNames.remove(currentMessage.sender);
	}
	}
	displayHash.put(currentMessage.sender, i);
	spannableDisplay.setSpan(style, 0, spannableDisplay.length(), 0);
	styledSenders.add(spannableDisplay);
	}
	} else {
	if (!appendedElided) {
	spannableDisplay = new SpannableString(sElidedString);
	spannableDisplay.setSpan(style, 0, spannableDisplay.length(), 0);
	appendedElided = true;
	styledSenders.add(spannableDisplay);
	}
	}
	if (shouldAddPhotos) {
	String senderEmail = TextUtils.isEmpty(currentMessage.sender) ?
	account :
	TextUtils.isEmpty(currentMessage.senderEmail) ?
	currentMessage.sender : currentMessage.senderEmail;
	if (i == 0) {
	// Always add the first sender!
	firstDisplayableSenderEmail = senderEmail;
	firstDisplayableSender = currentMessage.sender;
	} else {
	if (!Objects.equal(firstDisplayableSenderEmail, senderEmail)) {
	int indexOf = displayableSenderEmails.indexOf(senderEmail);
	if (indexOf > -1) {
	displayableSenderEmails.remove(indexOf);
	displayableSenderNames.remove(indexOf);
	}
	displayableSenderEmails.add(senderEmail);
	displayableSenderNames.add(currentMessage.sender);
	if (displayableSenderEmails.size() > DividedImageCanvas.MAX_DIVISIONS) {
	displayableSenderEmails.remove(0);
	displayableSenderNames.remove(0);
	}
	}
	}
	}
	}
	if (shouldAddPhotos && !TextUtils.isEmpty(firstDisplayableSenderEmail)) {
	if (displayableSenderEmails.size() < DividedImageCanvas.MAX_DIVISIONS) {
	displayableSenderEmails.add(0, firstDisplayableSenderEmail);
	displayableSenderNames.add(0, firstDisplayableSender);
	} else {
	displayableSenderEmails.set(0, firstDisplayableSenderEmail);
	displayableSenderNames.set(0, firstDisplayableSender);
	}
	}
	}

	private static CharacterStyle getUnreadStyleSpan() {
	return CharacterStyle.wrap(sUnreadStyleSpan);
	}

	private static CharacterStyle getReadStyleSpan() {
	return CharacterStyle.wrap(sReadStyleSpan);
	}

	static String getMe(Context context) {
	final Resources resources = context.getResources();
	final Locale locale = resources.getConfiguration().locale;

	if (sMeString == null \|\| !locale.equals(sMeStringLocale)) {
	sMeString = resources.getString(R.string.me);
	sMeStringLocale = locale;
	}
	return sMeString;
	}

	private static void formatDefault(ConversationItemViewModel header, String sendersString,
	Context context) {
	getSenderResources(context);
	// Clear any existing sender fragments; we must re-make all of them.
	header.senderFragments.clear();
	String[] senders = TextUtils.split(sendersString, Address.ADDRESS_DELIMETER);
	String[] namesOnly = new String[senders.length];
	Rfc822Token[] senderTokens;
	String display;
	for (int i = 0; i < senders.length; i++) {
	senderTokens = Rfc822Tokenizer.tokenize(senders[i]);
	if (senderTokens != null && senderTokens.length > 0) {
	display = senderTokens[0].getName();
	if (TextUtils.isEmpty(display)) {
	display = senderTokens[0].getAddress();
	}
	namesOnly[i] = display;
	}
	}
	generateSenderFragments(header, namesOnly);
	}

	private static void generateSenderFragments(ConversationItemViewModel header, String[] names) {
	header.sendersText = TextUtils.join(Address.ADDRESS_DELIMETER + " ", names);
	header.addSenderFragment(0, header.sendersText.length(), getReadStyleSpan(), true);
	}

	public static void formatSenders(ConversationItemViewModel header, Context context) {
	formatDefault(header, header.conversation.senders, context);
	}
	}