Baseline for the new ConversationLayout
Introduced a new Layout for Conversation Notifications.
There are still various open issues that will be
fixed in follow up Cls
Bug: 150905003
Test: Add conversations, obverve visuals
Change-Id: I8ab2e2988d3205a4491006df68ec14235109466f
diff --git a/core/java/com/android/internal/widget/ConversationLayout.java b/core/java/com/android/internal/widget/ConversationLayout.java
new file mode 100644
index 0000000..128f544
--- /dev/null
+++ b/core/java/com/android/internal/widget/ConversationLayout.java
@@ -0,0 +1,728 @@
+/*
+ * Copyright (C) 2020 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.internal.widget;
+
+import android.annotation.AttrRes;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.StyleRes;
+import android.app.Notification;
+import android.app.Person;
+import android.app.RemoteInputHistoryItem;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.drawable.Icon;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.text.TextUtils;
+import android.util.ArrayMap;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.view.Gravity;
+import android.view.RemotableViewMethod;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewTreeObserver;
+import android.view.animation.Interpolator;
+import android.view.animation.PathInterpolator;
+import android.widget.FrameLayout;
+import android.widget.ImageView;
+import android.widget.RemoteViews;
+import android.widget.TextView;
+
+import com.android.internal.R;
+import com.android.internal.graphics.ColorUtils;
+import com.android.internal.util.ContrastColorUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.regex.Pattern;
+
+/**
+ * A custom-built layout for the Notification.MessagingStyle allows dynamic addition and removal
+ * messages and adapts the layout accordingly.
+ */
+@RemoteViews.RemoteView
+public class ConversationLayout extends FrameLayout
+ implements ImageMessageConsumer, IMessagingLayout {
+
+ public static final boolean CONVERSATION_LAYOUT_ENABLED = true;
+ private static final float COLOR_SHIFT_AMOUNT = 60;
+ /**
+ * Pattren for filter some ingonable characters.
+ * p{Z} for any kind of whitespace or invisible separator.
+ * p{C} for any kind of punctuation character.
+ */
+ private static final Pattern IGNORABLE_CHAR_PATTERN
+ = Pattern.compile("[\\p{C}\\p{Z}]");
+ private static final Pattern SPECIAL_CHAR_PATTERN
+ = Pattern.compile ("[!@#$%&*()_+=|<>?{}\\[\\]~-]");
+ private static final Consumer<MessagingMessage> REMOVE_MESSAGE
+ = MessagingMessage::removeMessage;
+ public static final Interpolator LINEAR_OUT_SLOW_IN = new PathInterpolator(0f, 0f, 0.2f, 1f);
+ public static final Interpolator FAST_OUT_LINEAR_IN = new PathInterpolator(0.4f, 0f, 1f, 1f);
+ public static final Interpolator FAST_OUT_SLOW_IN = new PathInterpolator(0.4f, 0f, 0.2f, 1f);
+ public static final OnLayoutChangeListener MESSAGING_PROPERTY_ANIMATOR
+ = new MessagingPropertyAnimator();
+ private List<MessagingMessage> mMessages = new ArrayList<>();
+ private List<MessagingMessage> mHistoricMessages = new ArrayList<>();
+ private MessagingLinearLayout mMessagingLinearLayout;
+ private boolean mShowHistoricMessages;
+ private ArrayList<MessagingGroup> mGroups = new ArrayList<>();
+ private TextView mTitleView;
+ private int mLayoutColor;
+ private int mSenderTextColor;
+ private int mMessageTextColor;
+ private int mAvatarSize;
+ private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+ private Paint mTextPaint = new Paint();
+ private Icon mAvatarReplacement;
+ private boolean mIsOneToOne;
+ private ArrayList<MessagingGroup> mAddedGroups = new ArrayList<>();
+ private Person mUser;
+ private CharSequence mNameReplacement;
+ private boolean mIsCollapsed;
+ private ImageResolver mImageResolver;
+ private ImageView mConversationIcon;
+ private TextView mHeaderText;
+ private View mConversationIconBadge;
+ private Icon mLargeIcon;
+ private View mExpandButtonContainer;
+ private NotificationExpandButton mExpandButton;
+ private int mExpandButtonExpandedTopMargin;
+ private int mBadgedSideMargins;
+ private int mIconSizeBadged;
+ private int mIconSizeCentered;
+ private View mIcon;
+ private int mExpandedGroupTopMargin;
+
+ public ConversationLayout(@NonNull Context context) {
+ super(context);
+ }
+
+ public ConversationLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
+ super(context, attrs);
+ }
+
+ public ConversationLayout(@NonNull Context context, @Nullable AttributeSet attrs,
+ @AttrRes int defStyleAttr) {
+ super(context, attrs, defStyleAttr);
+ }
+
+ public ConversationLayout(@NonNull Context context, @Nullable AttributeSet attrs,
+ @AttrRes int defStyleAttr, @StyleRes int defStyleRes) {
+ super(context, attrs, defStyleAttr, defStyleRes);
+ }
+
+ @Override
+ protected void onFinishInflate() {
+ super.onFinishInflate();
+ mMessagingLinearLayout = findViewById(R.id.notification_messaging);
+ mMessagingLinearLayout.setMessagingLayout(this);
+ // We still want to clip, but only on the top, since views can temporarily out of bounds
+ // during transitions.
+ DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
+ int size = Math.max(displayMetrics.widthPixels, displayMetrics.heightPixels);
+ Rect rect = new Rect(0, 0, size, size);
+ mMessagingLinearLayout.setClipBounds(rect);
+ mTitleView = findViewById(R.id.title);
+ mAvatarSize = getResources().getDimensionPixelSize(R.dimen.messaging_avatar_size);
+ mTextPaint.setTextAlign(Paint.Align.CENTER);
+ mTextPaint.setAntiAlias(true);
+ mConversationIcon = findViewById(R.id.conversation_icon);
+ mIcon = findViewById(R.id.icon);
+ mConversationIconBadge = findViewById(R.id.conversation_icon_badge);
+ mHeaderText = findViewById(R.id.header_text);
+ mExpandButtonContainer = findViewById(R.id.expand_button_container);
+ mExpandButton = findViewById(R.id.expand_button);
+ mExpandButtonExpandedTopMargin = getResources().getDimensionPixelSize(
+ R.dimen.conversation_expand_button_top_margin_expanded);
+ mBadgedSideMargins = getResources().getDimensionPixelSize(
+ R.dimen.conversation_badge_side_margin);
+ mIconSizeBadged = getResources().getDimensionPixelSize(
+ R.dimen.conversation_icon_size_badged);
+ mIconSizeCentered = getResources().getDimensionPixelSize(
+ R.dimen.conversation_icon_size_centered);
+ mExpandedGroupTopMargin = getResources().getDimensionPixelSize(
+ R.dimen.conversation_icon_margin_top_centered);
+ }
+
+ @RemotableViewMethod
+ public void setAvatarReplacement(Icon icon) {
+ mAvatarReplacement = icon;
+ }
+
+ @RemotableViewMethod
+ public void setNameReplacement(CharSequence nameReplacement) {
+ mNameReplacement = nameReplacement;
+ }
+
+ /**
+ * Set this layout to show the collapsed representation.
+ *
+ * @param isCollapsed is it collapsed
+ */
+ @RemotableViewMethod
+ public void setIsCollapsed(boolean isCollapsed) {
+ mIsCollapsed = isCollapsed;
+ mMessagingLinearLayout.setMaxDisplayedLines(isCollapsed ? 1 : Integer.MAX_VALUE);
+ updateExpandButton();
+ }
+
+ @RemotableViewMethod
+ public void setData(Bundle extras) {
+ Parcelable[] messages = extras.getParcelableArray(Notification.EXTRA_MESSAGES);
+ List<Notification.MessagingStyle.Message> newMessages
+ = Notification.MessagingStyle.Message.getMessagesFromBundleArray(messages);
+ Parcelable[] histMessages = extras.getParcelableArray(Notification.EXTRA_HISTORIC_MESSAGES);
+ List<Notification.MessagingStyle.Message> newHistoricMessages
+ = Notification.MessagingStyle.Message.getMessagesFromBundleArray(histMessages);
+
+ // mUser now set (would be nice to avoid the side effect but WHATEVER)
+ setUser(extras.getParcelable(Notification.EXTRA_MESSAGING_PERSON));
+
+
+ // Append remote input history to newMessages (again, side effect is lame but WHATEVS)
+ RemoteInputHistoryItem[] history = (RemoteInputHistoryItem[])
+ extras.getParcelableArray(Notification.EXTRA_REMOTE_INPUT_HISTORY_ITEMS);
+ addRemoteInputHistoryToMessages(newMessages, history);
+
+ boolean showSpinner =
+ extras.getBoolean(Notification.EXTRA_SHOW_REMOTE_INPUT_SPINNER, false);
+
+ // bind it, baby
+ bind(newMessages, newHistoricMessages, showSpinner);
+ }
+
+ @Override
+ public void setImageResolver(ImageResolver resolver) {
+ mImageResolver = resolver;
+ }
+
+ private void addRemoteInputHistoryToMessages(
+ List<Notification.MessagingStyle.Message> newMessages,
+ RemoteInputHistoryItem[] remoteInputHistory) {
+ if (remoteInputHistory == null || remoteInputHistory.length == 0) {
+ return;
+ }
+ for (int i = remoteInputHistory.length - 1; i >= 0; i--) {
+ RemoteInputHistoryItem historyMessage = remoteInputHistory[i];
+ Notification.MessagingStyle.Message message = new Notification.MessagingStyle.Message(
+ historyMessage.getText(), 0, (Person) null, true /* remoteHistory */);
+ if (historyMessage.getUri() != null) {
+ message.setData(historyMessage.getMimeType(), historyMessage.getUri());
+ }
+ newMessages.add(message);
+ }
+ }
+
+ private void bind(List<Notification.MessagingStyle.Message> newMessages,
+ List<Notification.MessagingStyle.Message> newHistoricMessages,
+ boolean showSpinner) {
+ // convert MessagingStyle.Message to MessagingMessage, re-using ones from a previous binding
+ // if they exist
+ List<MessagingMessage> historicMessages = createMessages(newHistoricMessages,
+ true /* isHistoric */);
+ List<MessagingMessage> messages = createMessages(newMessages, false /* isHistoric */);
+
+ // Copy our groups, before they get clobbered
+ ArrayList<MessagingGroup> oldGroups = new ArrayList<>(mGroups);
+
+ // Add our new MessagingMessages to groups
+ List<List<MessagingMessage>> groups = new ArrayList<>();
+ List<Person> senders = new ArrayList<>();
+
+ // Lets first find the groups (populate `groups` and `senders`)
+ findGroups(historicMessages, messages, groups, senders);
+
+ // Let's now create the views and reorder them accordingly
+ // side-effect: updates mGroups, mAddedGroups
+ createGroupViews(groups, senders, showSpinner);
+
+ // Let's first check which groups were removed altogether and remove them in one animation
+ removeGroups(oldGroups);
+
+ // Let's remove the remaining messages
+ mMessages.forEach(REMOVE_MESSAGE);
+ mHistoricMessages.forEach(REMOVE_MESSAGE);
+
+ mMessages = messages;
+ mHistoricMessages = historicMessages;
+
+ updateHistoricMessageVisibility();
+ updateTitleAndNamesDisplay();
+
+ updateConversationIconAndHeaderText();
+
+ }
+
+ private void updateConversationIconAndHeaderText() {
+ // TODO: resolve this from shortcuts
+ // Set avatar and name
+ if (mIsOneToOne) {
+ // Let's resolve the icon / text from the last sender
+ mConversationIcon.setVisibility(VISIBLE);
+ mHeaderText.setVisibility(VISIBLE);
+ boolean found = false;
+ for (int i = mGroups.size() - 1; i >= 0; i--) {
+ MessagingGroup messagingGroup = mGroups.get(i);
+ Person messageSender = messagingGroup.getSender();
+ if (!mUser.equals(messageSender)) {
+ // Make sure the header is actually visible
+ // TODO: figure out what to do if there's a converationtitle + a Sender
+ mHeaderText.setText(messagingGroup.getSenderName());
+ mConversationIcon.setImageIcon(messagingGroup.getAvatarIcon());
+ found = true;
+ break;
+ }
+ }
+ if (!found) {
+ mHeaderText.setText(mUser.getName());
+ mConversationIcon.setImageIcon(mUser.getIcon());
+ }
+ } else {
+ mHeaderText.setVisibility(GONE);
+ if (mIsCollapsed) {
+ mConversationIcon.setVisibility(VISIBLE);
+ if (mLargeIcon != null) {
+ mConversationIcon.setImageIcon(mLargeIcon);
+ } else {
+ // TODO: generate LargeIcon from Conversation
+ }
+ } else {
+ mConversationIcon.setVisibility(GONE);
+ }
+ }
+ // update the icon position and sizing
+ int gravity;
+ int marginStart;
+ int marginTop;
+ int iconSize;
+ if (mIsOneToOne || mIsCollapsed) {
+ // Baded format
+ gravity = Gravity.LEFT;
+ marginStart = mBadgedSideMargins;
+ marginTop = mBadgedSideMargins;
+ iconSize = mIconSizeBadged;
+ } else {
+ gravity = Gravity.CENTER_HORIZONTAL;
+ marginStart = 0;
+ marginTop = mExpandedGroupTopMargin;
+ iconSize = mIconSizeCentered;
+ }
+ FrameLayout.LayoutParams layoutParams =
+ (LayoutParams) mConversationIconBadge.getLayoutParams();
+ layoutParams.gravity = gravity;
+ layoutParams.topMargin = marginTop;
+ layoutParams.setMarginStart(marginStart);
+ mConversationIconBadge.setLayoutParams(layoutParams);
+ ViewGroup.LayoutParams iconParams = mIcon.getLayoutParams();
+ iconParams.width = iconSize;
+ iconParams.height = iconSize;
+ mIcon.setLayoutParams(iconParams);
+ }
+
+ @RemotableViewMethod
+ public void setLargeIcon(Icon largeIcon) {
+ mLargeIcon = largeIcon;
+ }
+
+ private void removeGroups(ArrayList<MessagingGroup> oldGroups) {
+ int size = oldGroups.size();
+ for (int i = 0; i < size; i++) {
+ MessagingGroup group = oldGroups.get(i);
+ if (!mGroups.contains(group)) {
+ List<MessagingMessage> messages = group.getMessages();
+ Runnable endRunnable = () -> {
+ mMessagingLinearLayout.removeTransientView(group);
+ group.recycle();
+ };
+
+ boolean wasShown = group.isShown();
+ mMessagingLinearLayout.removeView(group);
+ if (wasShown && !MessagingLinearLayout.isGone(group)) {
+ mMessagingLinearLayout.addTransientView(group, 0);
+ group.removeGroupAnimated(endRunnable);
+ } else {
+ endRunnable.run();
+ }
+ mMessages.removeAll(messages);
+ mHistoricMessages.removeAll(messages);
+ }
+ }
+ }
+
+ private void updateTitleAndNamesDisplay() {
+ ArrayMap<CharSequence, String> uniqueNames = new ArrayMap<>();
+ ArrayMap<Character, CharSequence> uniqueCharacters = new ArrayMap<>();
+ for (int i = 0; i < mGroups.size(); i++) {
+ MessagingGroup group = mGroups.get(i);
+ CharSequence senderName = group.getSenderName();
+ if (!group.needsGeneratedAvatar() || TextUtils.isEmpty(senderName)) {
+ continue;
+ }
+ if (!uniqueNames.containsKey(senderName)) {
+ // Only use visible characters to get uniqueNames
+ String pureSenderName = IGNORABLE_CHAR_PATTERN
+ .matcher(senderName).replaceAll("" /* replacement */);
+ char c = pureSenderName.charAt(0);
+ if (uniqueCharacters.containsKey(c)) {
+ // this character was already used, lets make it more unique. We first need to
+ // resolve the existing character if it exists
+ CharSequence existingName = uniqueCharacters.get(c);
+ if (existingName != null) {
+ uniqueNames.put(existingName, findNameSplit((String) existingName));
+ uniqueCharacters.put(c, null);
+ }
+ uniqueNames.put(senderName, findNameSplit((String) senderName));
+ } else {
+ uniqueNames.put(senderName, Character.toString(c));
+ uniqueCharacters.put(c, pureSenderName);
+ }
+ }
+ }
+
+ // Now that we have the correct symbols, let's look what we have cached
+ ArrayMap<CharSequence, Icon> cachedAvatars = new ArrayMap<>();
+ for (int i = 0; i < mGroups.size(); i++) {
+ // Let's now set the avatars
+ MessagingGroup group = mGroups.get(i);
+ boolean isOwnMessage = group.getSender() == mUser;
+ CharSequence senderName = group.getSenderName();
+ if (!group.needsGeneratedAvatar() || TextUtils.isEmpty(senderName)
+ || (mIsOneToOne && mAvatarReplacement != null && !isOwnMessage)) {
+ continue;
+ }
+ String symbol = uniqueNames.get(senderName);
+ Icon cachedIcon = group.getAvatarSymbolIfMatching(senderName,
+ symbol, mLayoutColor);
+ if (cachedIcon != null) {
+ cachedAvatars.put(senderName, cachedIcon);
+ }
+ }
+
+ for (int i = 0; i < mGroups.size(); i++) {
+ // Let's now set the avatars
+ MessagingGroup group = mGroups.get(i);
+ CharSequence senderName = group.getSenderName();
+ if (!group.needsGeneratedAvatar() || TextUtils.isEmpty(senderName)) {
+ continue;
+ }
+ if (mIsOneToOne && mAvatarReplacement != null && group.getSender() != mUser) {
+ group.setAvatar(mAvatarReplacement);
+ } else {
+ Icon cachedIcon = cachedAvatars.get(senderName);
+ if (cachedIcon == null) {
+ cachedIcon = createAvatarSymbol(senderName, uniqueNames.get(senderName),
+ mLayoutColor);
+ cachedAvatars.put(senderName, cachedIcon);
+ }
+ group.setCreatedAvatar(cachedIcon, senderName, uniqueNames.get(senderName),
+ mLayoutColor);
+ }
+ }
+ }
+
+ private Icon createAvatarSymbol(CharSequence senderName, String symbol, int layoutColor) {
+ if (symbol.isEmpty() || TextUtils.isDigitsOnly(symbol) ||
+ SPECIAL_CHAR_PATTERN.matcher(symbol).find()) {
+ Icon avatarIcon = Icon.createWithResource(getContext(),
+ R.drawable.messaging_user);
+ avatarIcon.setTint(findColor(senderName, layoutColor));
+ return avatarIcon;
+ } else {
+ Bitmap bitmap = Bitmap.createBitmap(mAvatarSize, mAvatarSize, Bitmap.Config.ARGB_8888);
+ Canvas canvas = new Canvas(bitmap);
+ float radius = mAvatarSize / 2.0f;
+ int color = findColor(senderName, layoutColor);
+ mPaint.setColor(color);
+ canvas.drawCircle(radius, radius, radius, mPaint);
+ boolean needDarkText = ColorUtils.calculateLuminance(color) > 0.5f;
+ mTextPaint.setColor(needDarkText ? Color.BLACK : Color.WHITE);
+ mTextPaint.setTextSize(symbol.length() == 1 ? mAvatarSize * 0.5f : mAvatarSize * 0.3f);
+ int yPos = (int) (radius - ((mTextPaint.descent() + mTextPaint.ascent()) / 2));
+ canvas.drawText(symbol, radius, yPos, mTextPaint);
+ return Icon.createWithBitmap(bitmap);
+ }
+ }
+
+ private int findColor(CharSequence senderName, int layoutColor) {
+ double luminance = ContrastColorUtil.calculateLuminance(layoutColor);
+ float shift = Math.abs(senderName.hashCode()) % 5 / 4.0f - 0.5f;
+
+ // we need to offset the range if the luminance is too close to the borders
+ shift += Math.max(COLOR_SHIFT_AMOUNT / 2.0f / 100 - luminance, 0);
+ shift -= Math.max(COLOR_SHIFT_AMOUNT / 2.0f / 100 - (1.0f - luminance), 0);
+ return ContrastColorUtil.getShiftedColor(layoutColor,
+ (int) (shift * COLOR_SHIFT_AMOUNT));
+ }
+
+ private String findNameSplit(String existingName) {
+ String[] split = existingName.split(" ");
+ if (split.length > 1) {
+ return Character.toString(split[0].charAt(0))
+ + Character.toString(split[1].charAt(0));
+ }
+ return existingName.substring(0, 1);
+ }
+
+ @RemotableViewMethod
+ public void setLayoutColor(int color) {
+ mLayoutColor = color;
+ }
+
+ @RemotableViewMethod
+ public void setIsOneToOne(boolean oneToOne) {
+ mIsOneToOne = oneToOne;
+ }
+
+ @RemotableViewMethod
+ public void setSenderTextColor(int color) {
+ mSenderTextColor = color;
+ }
+
+ @RemotableViewMethod
+ public void setMessageTextColor(int color) {
+ mMessageTextColor = color;
+ }
+
+ private void setUser(Person user) {
+ mUser = user;
+ if (mUser.getIcon() == null) {
+ Icon userIcon = Icon.createWithResource(getContext(),
+ R.drawable.messaging_user);
+ userIcon.setTint(mLayoutColor);
+ mUser = mUser.toBuilder().setIcon(userIcon).build();
+ }
+ }
+
+ private void createGroupViews(List<List<MessagingMessage>> groups,
+ List<Person> senders, boolean showSpinner) {
+ mGroups.clear();
+ for (int groupIndex = 0; groupIndex < groups.size(); groupIndex++) {
+ List<MessagingMessage> group = groups.get(groupIndex);
+ MessagingGroup newGroup = null;
+ // we'll just take the first group that exists or create one there is none
+ for (int messageIndex = group.size() - 1; messageIndex >= 0; messageIndex--) {
+ MessagingMessage message = group.get(messageIndex);
+ newGroup = message.getGroup();
+ if (newGroup != null) {
+ break;
+ }
+ }
+ // Create a new group, adding it to the linear layout as well
+ if (newGroup == null) {
+ newGroup = MessagingGroup.createGroup(mMessagingLinearLayout);
+ mAddedGroups.add(newGroup);
+ }
+ newGroup.setDisplayImagesAtEnd(mIsCollapsed);
+ newGroup.setLayoutColor(mLayoutColor);
+ newGroup.setTextColors(mSenderTextColor, mMessageTextColor);
+ Person sender = senders.get(groupIndex);
+ CharSequence nameOverride = null;
+ if (sender != mUser && mNameReplacement != null) {
+ nameOverride = mNameReplacement;
+ }
+ newGroup.setShowingAvatar(!mIsOneToOne && !mIsCollapsed);
+ newGroup.setSingleLine(mIsCollapsed);
+ newGroup.setSender(sender, nameOverride);
+ newGroup.setSending(groupIndex == (groups.size() - 1) && showSpinner);
+ mGroups.add(newGroup);
+
+ // Reposition to the correct place (if we're re-using a group)
+ if (mMessagingLinearLayout.indexOfChild(newGroup) != groupIndex) {
+ mMessagingLinearLayout.removeView(newGroup);
+ mMessagingLinearLayout.addView(newGroup, groupIndex);
+ }
+ newGroup.setMessages(group);
+ }
+ }
+
+ private void findGroups(List<MessagingMessage> historicMessages,
+ List<MessagingMessage> messages, List<List<MessagingMessage>> groups,
+ List<Person> senders) {
+ CharSequence currentSenderKey = null;
+ List<MessagingMessage> currentGroup = null;
+ int histSize = historicMessages.size();
+ for (int i = 0; i < histSize + messages.size(); i++) {
+ MessagingMessage message;
+ if (i < histSize) {
+ message = historicMessages.get(i);
+ } else {
+ message = messages.get(i - histSize);
+ }
+ boolean isNewGroup = currentGroup == null;
+ Person sender = message.getMessage().getSenderPerson();
+ CharSequence key = sender == null ? null
+ : sender.getKey() == null ? sender.getName() : sender.getKey();
+ isNewGroup |= !TextUtils.equals(key, currentSenderKey);
+ if (isNewGroup) {
+ currentGroup = new ArrayList<>();
+ groups.add(currentGroup);
+ if (sender == null) {
+ sender = mUser;
+ }
+ senders.add(sender);
+ currentSenderKey = key;
+ }
+ currentGroup.add(message);
+ }
+ }
+
+ /**
+ * Creates new messages, reusing existing ones if they are available.
+ *
+ * @param newMessages the messages to parse.
+ */
+ private List<MessagingMessage> createMessages(
+ List<Notification.MessagingStyle.Message> newMessages, boolean historic) {
+ List<MessagingMessage> result = new ArrayList<>();
+ for (int i = 0; i < newMessages.size(); i++) {
+ Notification.MessagingStyle.Message m = newMessages.get(i);
+ MessagingMessage message = findAndRemoveMatchingMessage(m);
+ if (message == null) {
+ message = MessagingMessage.createMessage(this, m, mImageResolver);
+ }
+ message.setIsHistoric(historic);
+ result.add(message);
+ }
+ return result;
+ }
+
+ private MessagingMessage findAndRemoveMatchingMessage(Notification.MessagingStyle.Message m) {
+ for (int i = 0; i < mMessages.size(); i++) {
+ MessagingMessage existing = mMessages.get(i);
+ if (existing.sameAs(m)) {
+ mMessages.remove(i);
+ return existing;
+ }
+ }
+ for (int i = 0; i < mHistoricMessages.size(); i++) {
+ MessagingMessage existing = mHistoricMessages.get(i);
+ if (existing.sameAs(m)) {
+ mHistoricMessages.remove(i);
+ return existing;
+ }
+ }
+ return null;
+ }
+
+ public void showHistoricMessages(boolean show) {
+ mShowHistoricMessages = show;
+ updateHistoricMessageVisibility();
+ }
+
+ private void updateHistoricMessageVisibility() {
+ int numHistoric = mHistoricMessages.size();
+ for (int i = 0; i < numHistoric; i++) {
+ MessagingMessage existing = mHistoricMessages.get(i);
+ existing.setVisibility(mShowHistoricMessages ? VISIBLE : GONE);
+ }
+ int numGroups = mGroups.size();
+ for (int i = 0; i < numGroups; i++) {
+ MessagingGroup group = mGroups.get(i);
+ int visibleChildren = 0;
+ List<MessagingMessage> messages = group.getMessages();
+ int numGroupMessages = messages.size();
+ for (int j = 0; j < numGroupMessages; j++) {
+ MessagingMessage message = messages.get(j);
+ if (message.getVisibility() != GONE) {
+ visibleChildren++;
+ }
+ }
+ if (visibleChildren > 0 && group.getVisibility() == GONE) {
+ group.setVisibility(VISIBLE);
+ } else if (visibleChildren == 0 && group.getVisibility() != GONE) {
+ group.setVisibility(GONE);
+ }
+ }
+ }
+
+ @Override
+ protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+ super.onLayout(changed, left, top, right, bottom);
+ if (!mAddedGroups.isEmpty()) {
+ getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
+ @Override
+ public boolean onPreDraw() {
+ for (MessagingGroup group : mAddedGroups) {
+ if (!group.isShown()) {
+ continue;
+ }
+ MessagingPropertyAnimator.fadeIn(group.getAvatar());
+ MessagingPropertyAnimator.fadeIn(group.getSenderView());
+ MessagingPropertyAnimator.startLocalTranslationFrom(group,
+ group.getHeight(), LINEAR_OUT_SLOW_IN);
+ }
+ mAddedGroups.clear();
+ getViewTreeObserver().removeOnPreDrawListener(this);
+ return true;
+ }
+ });
+ }
+ }
+
+ public MessagingLinearLayout getMessagingLinearLayout() {
+ return mMessagingLinearLayout;
+ }
+
+ public ArrayList<MessagingGroup> getMessagingGroups() {
+ return mGroups;
+ }
+
+ private void updateExpandButton() {
+ int drawableId;
+ int contentDescriptionId;
+ int gravity;
+ int topMargin = 0;
+ if (mIsCollapsed) {
+ drawableId = R.drawable.ic_expand_notification;
+ contentDescriptionId = R.string.expand_button_content_description_collapsed;
+ gravity = Gravity.CENTER;
+ } else {
+ drawableId = R.drawable.ic_collapse_notification;
+ contentDescriptionId = R.string.expand_button_content_description_expanded;
+ gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP;
+ topMargin = mExpandButtonExpandedTopMargin;
+ }
+ mExpandButton.setImageDrawable(getContext().getDrawable(drawableId));
+ mExpandButton.setColorFilter(mExpandButton.getOriginalNotificationColor());
+
+ // update if the expand button is centered
+ FrameLayout.LayoutParams layoutParams = (LayoutParams) mExpandButton.getLayoutParams();
+ layoutParams.gravity = gravity;
+ layoutParams.topMargin = topMargin;
+ mExpandButton.setLayoutParams(layoutParams);
+
+ mExpandButtonContainer.setContentDescription(mContext.getText(contentDescriptionId));
+ }
+
+ public void updateExpandability(boolean expandable, @Nullable OnClickListener onClickListener) {
+ if (expandable) {
+ mExpandButtonContainer.setVisibility(VISIBLE);
+ mExpandButtonContainer.setOnClickListener(onClickListener);
+ } else {
+ // TODO: handle content paddings to end of layout
+ mExpandButtonContainer.setVisibility(GONE);
+ }
+ }
+}