From 9f04c28bfd2b21ec8d680bc90e80f5c6f28bc76a Mon Sep 17 00:00:00 2001
From: Greyson Parrelli <greyson@signal.org>
Date: Fri, 1 Feb 2019 09:06:59 -0800
Subject: [PATCH] Implemented conversation search.

You can now search for messages within a specific conversation.
---
 res/layout/conversation_activity.xml          |  10 +-
 res/layout/conversation_search_nav.xml        |  76 +++++++++
 res/menu/conversation.xml                     |   9 +-
 res/values/strings.xml                        |   2 +
 .../securesms/BindableConversationItem.java   |   1 +
 .../securesms/ConversationListItem.java       |  55 +------
 .../securesms/DatabaseUpgradeActivity.java    |   2 +
 .../securesms/MessageDetailsActivity.java     |   2 +-
 .../ConversationSearchBottomBar.java          |  88 +++++++++++
 .../conversation/ConversationActivity.java    | 105 ++++++++++++-
 .../conversation/ConversationAdapter.java     |   7 +
 .../conversation/ConversationFragment.java    |  86 +++++-----
 .../conversation/ConversationItem.java        |  15 +-
 .../ConversationSearchViewModel.java          | 147 ++++++++++++++++++
 .../conversation/ConversationUpdateItem.java  |   1 +
 .../securesms/database/CursorList.java        |   6 +
 .../database/CursorRecyclerViewAdapter.java   |   6 +-
 .../securesms/database/MmsSmsDatabase.java    |  20 +++
 .../securesms/database/SearchDatabase.java    |  92 ++++++++---
 .../database/helpers/SQLCipherOpenHelper.java |  78 +++++++++-
 .../securesms/search/SearchFragment.java      |   2 +-
 .../securesms/search/SearchRepository.java    |  81 +++++++---
 .../securesms/search/SearchViewModel.java     |  13 +-
 .../securesms/search/model/MessageResult.java |  15 +-
 .../securesms/util/CloseableLiveData.java     |  35 +++++
 .../securesms/util/SearchUtil.java            |  96 ++++++++++++
 .../securesms/util/SearchUtilTest.java        |  65 ++++++++
 27 files changed, 964 insertions(+), 151 deletions(-)
 create mode 100644 res/layout/conversation_search_nav.xml
 create mode 100644 src/org/thoughtcrime/securesms/components/ConversationSearchBottomBar.java
 create mode 100644 src/org/thoughtcrime/securesms/conversation/ConversationSearchViewModel.java
 create mode 100644 src/org/thoughtcrime/securesms/util/CloseableLiveData.java
 create mode 100644 src/org/thoughtcrime/securesms/util/SearchUtil.java
 create mode 100644 test/unitTest/java/org/thoughtcrime/securesms/util/SearchUtilTest.java

diff --git a/res/layout/conversation_activity.xml b/res/layout/conversation_activity.xml
index 7a92c24e20..ec2bbf6e37 100644
--- a/res/layout/conversation_activity.xml
+++ b/res/layout/conversation_activity.xml
@@ -54,7 +54,15 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"/>
 
-        <include layout="@layout/conversation_input_panel"/>
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <include layout="@layout/conversation_input_panel"/>
+
+            <include layout="@layout/conversation_search_nav" />
+
+        </FrameLayout>
 
         <Button android:id="@+id/register_button"
                 android:layout_width="fill_parent"
diff --git a/res/layout/conversation_search_nav.xml b/res/layout/conversation_search_nav.xml
new file mode 100644
index 0000000000..c461926d71
--- /dev/null
+++ b/res/layout/conversation_search_nav.xml
@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="utf-8"?>
+<org.thoughtcrime.securesms.components.ConversationSearchBottomBar
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/conversation_search_nav"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?conversation_background"
+    android:visibility="gone"
+    tools:visibility="visible"
+    tools:parentTag="android.support.constraint.ConstraintLayout">
+
+    <TextView
+        android:id="@+id/conversation_search_position"
+        style="@style/Signal.Text.Body"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_marginBottom="8dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/conversation_search_up"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="37 of 73" />
+
+    <ImageView
+        android:id="@+id/conversation_search_up"
+        android:layout_width="40dp"
+        android:layout_height="40dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginRight="8dp"
+        android:layout_marginBottom="8dp"
+        android:background="?selectableItemBackgroundBorderless"
+        android:padding="8dp"
+        android:src="@drawable/ic_keyboard_arrow_up_white_36dp"
+        android:tint="@color/signal_primary"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/conversation_search_down"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <ImageView
+        android:id="@+id/conversation_search_down"
+        android:layout_width="40dp"
+        android:layout_height="40dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginRight="8dp"
+        android:layout_marginBottom="8dp"
+        android:background="?selectableItemBackgroundBorderless"
+        android:padding="8dp"
+        android:src="@drawable/ic_keyboard_arrow_down_white_24dp"
+        android:tint="@color/signal_primary"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <com.pnikosis.materialishprogress.ProgressWheel
+        android:id="@+id/conversation_search_progress_wheel"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_gravity="center"
+        android:layout_marginTop="0dp"
+        android:layout_marginBottom="0dp"
+        android:indeterminate="true"
+        android:padding="8dp"
+        android:background="?conversation_background"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:matProg_barColor="@color/core_grey_25"
+        app:matProg_progressIndeterminate="true" />
+
+</org.thoughtcrime.securesms.components.ConversationSearchBottomBar>
\ No newline at end of file
diff --git a/res/menu/conversation.xml b/res/menu/conversation.xml
index b6de13945a..ad54667649 100644
--- a/res/menu/conversation.xml
+++ b/res/menu/conversation.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <item android:title="@string/conversation__menu_view_all_media"
           android:id="@+id/menu_view_media" />
@@ -7,6 +8,12 @@
     <item android:title="@string/conversation__menu_conversation_settings"
           android:id="@+id/menu_conversation_settings"/>
 
+
+    <item android:title="@string/SearchToolbar_search"
+          android:id="@+id/menu_search"
+          app:actionViewClass="android.support.v7.widget.SearchView"
+          app:showAsAction="collapseActionView"/>
+
     <item android:title="@string/conversation__menu_add_shortcut"
           android:id="@+id/menu_add_shortcut"/>
 
diff --git a/res/values/strings.xml b/res/values/strings.xml
index d5257a4a9b..7967d06cb8 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -180,6 +180,8 @@
     <string name="ConversationActivity_signal_cannot_sent_sms_mms_messages_because_it_is_not_your_default_sms_app">Signal cannot send SMS/MMS messages because it is not your default SMS app. Would you like to change this in your Android settings?</string>
     <string name="ConversationActivity_yes">Yes</string>
     <string name="ConversationActivity_no">No</string>
+    <string name="ConversationActivity_search_position">%1$d of %2$d</string>
+    <string name="ConversationActivity_no_results">No results</string>
 
     <!-- ConversationAdapter -->
     <plurals name="ConversationAdapter_n_unread_messages">
diff --git a/src/org/thoughtcrime/securesms/BindableConversationItem.java b/src/org/thoughtcrime/securesms/BindableConversationItem.java
index 5f7fcc8270..d92c9704f2 100644
--- a/src/org/thoughtcrime/securesms/BindableConversationItem.java
+++ b/src/org/thoughtcrime/securesms/BindableConversationItem.java
@@ -24,6 +24,7 @@ public interface BindableConversationItem extends Unbindable {
             @NonNull Locale                  locale,
             @NonNull Set<MessageRecord>      batchSelected,
             @NonNull Recipient               recipients,
+            @Nullable String                 searchQuery,
                      boolean                 pulseHighlight);
 
   MessageRecord getMessageRecord();
diff --git a/src/org/thoughtcrime/securesms/ConversationListItem.java b/src/org/thoughtcrime/securesms/ConversationListItem.java
index 6a1fdafe8c..0e26856e67 100644
--- a/src/org/thoughtcrime/securesms/ConversationListItem.java
+++ b/src/org/thoughtcrime/securesms/ConversationListItem.java
@@ -18,7 +18,6 @@ package org.thoughtcrime.securesms;
 
 import android.content.Context;
 import android.content.res.ColorStateList;
-import android.graphics.Color;
 import android.graphics.Typeface;
 import android.graphics.drawable.RippleDrawable;
 import android.os.Build.VERSION;
@@ -32,11 +31,9 @@ import android.text.TextUtils;
 import android.text.style.StyleSpan;
 import android.util.AttributeSet;
 import android.view.View;
-import android.widget.ImageView;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
-import com.amulyakhare.textdrawable.TextDrawable;
 import com.annimon.stream.Stream;
 
 import org.thoughtcrime.securesms.components.AlertView;
@@ -51,6 +48,8 @@ import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.RecipientModifiedListener;
 import org.thoughtcrime.securesms.search.model.MessageResult;
 import org.thoughtcrime.securesms.util.DateUtils;
+import org.thoughtcrime.securesms.util.SearchUtil;
+import org.thoughtcrime.securesms.util.SearchUtil.StyleFactory;
 import org.thoughtcrime.securesms.util.ThemeUtil;
 import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.ViewUtil;
@@ -60,8 +59,6 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Set;
 
-import static org.thoughtcrime.securesms.util.SpanUtil.color;
-
 public class ConversationListItem extends RelativeLayout
                                   implements RecipientModifiedListener,
                                              BindableConversationListItem, Unbindable
@@ -150,7 +147,7 @@ public class ConversationListItem extends RelativeLayout
 
     this.recipient.addListener(this);
     if (highlightSubstring != null) {
-      this.fromView.setText(getHighlightedSpan(locale, recipient.getName(), highlightSubstring));
+      this.fromView.setText(SearchUtil.getHighlightedSpan(locale, () -> new StyleSpan(Typeface.BOLD), recipient.getName(), highlightSubstring));
     } else {
       this.fromView.setText(recipient, unreadCount == 0);
     }
@@ -204,8 +201,8 @@ public class ConversationListItem extends RelativeLayout
 
     this.recipient.addListener(this);
 
-    fromView.setText(getHighlightedSpan(locale, recipient.getName(), highlightSubstring));
-    subjectView.setText(getHighlightedSpan(locale, contact.getAddress().toPhoneString(), highlightSubstring));
+    fromView.setText(SearchUtil.getHighlightedSpan(locale, () -> new StyleSpan(Typeface.BOLD), recipient.getName(), highlightSubstring));
+    subjectView.setText(SearchUtil.getHighlightedSpan(locale, () -> new StyleSpan(Typeface.BOLD), contact.getAddress().toPhoneString(), highlightSubstring));
     dateView.setText("");
     archivedView.setVisibility(GONE);
     unreadIndicator.setVisibility(GONE);
@@ -224,13 +221,13 @@ public class ConversationListItem extends RelativeLayout
                    @Nullable String        highlightSubstring)
   {
     this.selectedThreads = Collections.emptySet();
-    this.recipient       = messageResult.recipient;
+    this.recipient       = messageResult.conversationRecipient;
     this.glideRequests   = glideRequests;
 
     this.recipient.addListener(this);
 
     fromView.setText(recipient, true);
-    subjectView.setText(getHighlightedSpan(locale, messageResult.bodySnippet, highlightSubstring));
+    subjectView.setText(SearchUtil.getHighlightedSpan(locale, () -> new StyleSpan(Typeface.BOLD), messageResult.bodySnippet, highlightSubstring));
     dateView.setText(DateUtils.getBriefRelativeTimeSpanString(getContext(), locale, messageResult.receivedTimestampMs));
     archivedView.setVisibility(GONE);
     unreadIndicator.setVisibility(GONE);
@@ -333,44 +330,6 @@ public class ConversationListItem extends RelativeLayout
     unreadIndicator.setVisibility(View.VISIBLE);
   }
 
-  private Spanned getHighlightedSpan(@NonNull  Locale locale,
-                                     @Nullable String value,
-                                     @Nullable String highlight)
-  {
-    if (TextUtils.isEmpty(value)) {
-      return new SpannableString("");
-    }
-
-    value = value.replaceAll("\n", " ");
-
-    if (TextUtils.isEmpty(highlight)) {
-      return new SpannableString(value);
-    }
-
-    String       normalizedValue  = value.toLowerCase(locale);
-    String       normalizedTest   = highlight.toLowerCase(locale);
-    List<String> testTokens       = Stream.of(normalizedTest.split(" ")).filter(s -> s.trim().length() > 0).toList();
-
-    Spannable spanned          = new SpannableString(value);
-    int       searchStartIndex = 0;
-
-    for (String token : testTokens) {
-      if (searchStartIndex >= spanned.length()) {
-        break;
-      }
-
-      int start = normalizedValue.indexOf(token, searchStartIndex);
-
-      if (start >= 0) {
-        int end = Math.min(start + token.length(), spanned.length());
-        spanned.setSpan(new StyleSpan(Typeface.BOLD), start, end, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
-        searchStartIndex = end;
-      }
-    }
-
-    return spanned;
-  }
-
   @Override
   public void onModified(final Recipient recipient) {
     Util.runOnMain(() -> {
diff --git a/src/org/thoughtcrime/securesms/DatabaseUpgradeActivity.java b/src/org/thoughtcrime/securesms/DatabaseUpgradeActivity.java
index c1512aa341..1a8590f2ae 100644
--- a/src/org/thoughtcrime/securesms/DatabaseUpgradeActivity.java
+++ b/src/org/thoughtcrime/securesms/DatabaseUpgradeActivity.java
@@ -96,6 +96,7 @@ public class DatabaseUpgradeActivity extends BaseActivity {
   public static final int COLOR_MIGRATION                      = 412;
   public static final int UNIDENTIFIED_DELIVERY                = 422;
   public static final int SIGNALING_KEY_DEPRECATION            = 447;
+  public static final int CONVERSATION_SEARCH                  = 455;
 
   private static final SortedSet<Integer> UPGRADE_VERSIONS = new TreeSet<Integer>() {{
     add(NO_MORE_KEY_EXCHANGE_PREFIX_VERSION);
@@ -123,6 +124,7 @@ public class DatabaseUpgradeActivity extends BaseActivity {
     add(COLOR_MIGRATION);
     add(UNIDENTIFIED_DELIVERY);
     add(SIGNALING_KEY_DEPRECATION);
+    add(CONVERSATION_SEARCH);
   }};
 
   private MasterSecret masterSecret;
diff --git a/src/org/thoughtcrime/securesms/MessageDetailsActivity.java b/src/org/thoughtcrime/securesms/MessageDetailsActivity.java
index 07415b2124..1b48432581 100644
--- a/src/org/thoughtcrime/securesms/MessageDetailsActivity.java
+++ b/src/org/thoughtcrime/securesms/MessageDetailsActivity.java
@@ -271,7 +271,7 @@ public class MessageDetailsActivity extends PassphraseRequiredActionBarActivity
       toFromRes = R.string.message_details_header__from;
     }
     toFrom.setText(toFromRes);
-    conversationItem.bind(messageRecord, Optional.absent(), Optional.absent(), glideRequests, dynamicLanguage.getCurrentLocale(), new HashSet<>(), recipient, false);
+    conversationItem.bind(messageRecord, Optional.absent(), Optional.absent(), glideRequests, dynamicLanguage.getCurrentLocale(), new HashSet<>(), recipient, null, false);
     recipientsList.setAdapter(new MessageDetailsRecipientAdapter(this, glideRequests, messageRecord, recipients, isPushGroup));
   }
 
diff --git a/src/org/thoughtcrime/securesms/components/ConversationSearchBottomBar.java b/src/org/thoughtcrime/securesms/components/ConversationSearchBottomBar.java
new file mode 100644
index 0000000000..64ef25f266
--- /dev/null
+++ b/src/org/thoughtcrime/securesms/components/ConversationSearchBottomBar.java
@@ -0,0 +1,88 @@
+package org.thoughtcrime.securesms.components;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.constraint.ConstraintLayout;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.TextView;
+
+import org.thoughtcrime.securesms.R;
+
+/**
+ * Bottom navigation bar shown in the {@link org.thoughtcrime.securesms.conversation.ConversationActivity}
+ * when the user is searching within a conversation. Shows details about the results and allows the
+ * user to move between them.
+ */
+public class ConversationSearchBottomBar extends ConstraintLayout {
+
+  private View     searchDown;
+  private View     searchUp;
+  private TextView searchPositionText;
+  private View     progressWheel;
+
+  private EventListener eventListener;
+
+
+  public ConversationSearchBottomBar(Context context) {
+    super(context);
+  }
+
+  public ConversationSearchBottomBar(Context context, AttributeSet attrs) {
+    super(context, attrs);
+  }
+
+  @Override
+  protected void onFinishInflate() {
+    super.onFinishInflate();
+
+    this.searchUp           = findViewById(R.id.conversation_search_up);
+    this.searchDown         = findViewById(R.id.conversation_search_down);
+    this.searchPositionText = findViewById(R.id.conversation_search_position);
+    this.progressWheel      = findViewById(R.id.conversation_search_progress_wheel);
+  }
+
+  public void setData(int position, int count) {
+    progressWheel.setVisibility(GONE);
+
+    searchUp.setOnClickListener(v -> {
+      if (eventListener != null) {
+        eventListener.onSearchMoveUpPressed();
+      }
+    });
+
+    searchDown.setOnClickListener(v -> {
+      if (eventListener != null) {
+        eventListener.onSearchMoveDownPressed();
+      }
+    });
+
+    if (count > 0) {
+      searchPositionText.setText(getResources().getString(R.string.ConversationActivity_search_position, position + 1, count));
+    } else {
+      searchPositionText.setText(R.string.ConversationActivity_no_results);
+    }
+
+    setViewEnabled(searchUp, position < (count - 1));
+    setViewEnabled(searchDown, position > 0);
+  }
+
+  public void showLoading() {
+    progressWheel.setVisibility(VISIBLE);
+  }
+
+  private void setViewEnabled(@NonNull View view, boolean enabled) {
+    view.setEnabled(enabled);
+    view.setAlpha(enabled ? 1f : 0.25f);
+  }
+
+  public void setEventListener(@Nullable EventListener eventListener) {
+    this.eventListener = eventListener;
+  }
+
+  public interface EventListener {
+    void onSearchMoveUpPressed();
+    void onSearchMoveDownPressed();
+  }
+}
diff --git a/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java b/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java
index baf4effe38..336d44332b 100644
--- a/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java
+++ b/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java
@@ -49,6 +49,7 @@ import android.support.v4.view.MenuItemCompat;
 import android.support.v4.view.WindowCompat;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AlertDialog;
+import android.support.v7.widget.SearchView;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
@@ -97,6 +98,7 @@ import org.thoughtcrime.securesms.color.MaterialColor;
 import org.thoughtcrime.securesms.components.AnimatingToggle;
 import org.thoughtcrime.securesms.components.AttachmentTypeSelector;
 import org.thoughtcrime.securesms.components.ComposeText;
+import org.thoughtcrime.securesms.components.ConversationSearchBottomBar;
 import org.thoughtcrime.securesms.components.HidingLinearLayout;
 import org.thoughtcrime.securesms.components.InputAwareLayout;
 import org.thoughtcrime.securesms.components.InputPanel;
@@ -179,6 +181,7 @@ import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.RecipientFormattingException;
 import org.thoughtcrime.securesms.recipients.RecipientModifiedListener;
 import org.thoughtcrime.securesms.scribbles.ScribbleActivity;
+import org.thoughtcrime.securesms.search.model.MessageResult;
 import org.thoughtcrime.securesms.service.KeyCachingService;
 import org.thoughtcrime.securesms.sms.MessageSender;
 import org.thoughtcrime.securesms.sms.OutgoingEncryptedMessage;
@@ -235,7 +238,8 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
                OnKeyboardShownListener,
                AttachmentDrawerListener,
                InputPanel.Listener,
-               InputPanel.MediaListener
+               InputPanel.MediaListener,
+               ConversationSearchBottomBar.EventListener
 {
   private static final String TAG = ConversationActivity.class.getSimpleName();
 
@@ -280,6 +284,8 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
   private   Stub<UnverifiedBannerView> unverifiedBannerView;
   private   Stub<GroupShareProfileView> groupShareProfileView;
   private   TypingStatusTextWatcher     typingTextWatcher;
+  private   ConversationSearchBottomBar searchNav;
+  private   MenuItem                    searchViewItem;
 
   private   AttachmentTypeSelector attachmentTypeSelector;
   private   AttachmentManager      attachmentManager;
@@ -290,7 +296,9 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
   protected HidingLinearLayout     inlineAttachmentToggle;
   private   QuickAttachmentDrawer  quickAttachmentDrawer;
   private   InputPanel             inputPanel;
-  private   LinkPreviewViewModel   linkPreviewViewModel;
+
+  private LinkPreviewViewModel        linkPreviewViewModel;
+  private ConversationSearchViewModel searchViewModel;
 
   private Recipient  recipient;
   private long       threadId;
@@ -331,6 +339,7 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
     initializeViews();
     initializeResources();
     initializeLinkPreviewObserver();
+    initializeSearchObserver();
     initializeSecurity(false, isDefaultSms).addListener(new AssertedSuccessListener<Boolean>() {
       @Override
       public void onSuccess(Boolean result) {
@@ -643,6 +652,56 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       inflater.inflate(R.menu.conversation_add_to_contacts, menu);
     }
 
+    searchViewItem = menu.findItem(R.id.menu_search);
+
+    SearchView                     searchView    = (SearchView) searchViewItem.getActionView();
+    SearchView.OnQueryTextListener queryListener = new SearchView.OnQueryTextListener() {
+      @Override
+      public boolean onQueryTextSubmit(String query) {
+        searchViewModel.onQueryUpdated(query, threadId);
+        searchNav.showLoading();
+        fragment.onSearchQueryUpdated(query);
+        return true;
+      }
+
+      @Override
+      public boolean onQueryTextChange(String query) {
+        searchViewModel.onQueryUpdated(query, threadId);
+        searchNav.showLoading();
+        fragment.onSearchQueryUpdated(query);
+        return true;
+      }
+    };
+
+    searchViewItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
+      @Override
+      public boolean onMenuItemActionExpand(MenuItem item) {
+        searchView.setOnQueryTextListener(queryListener);
+        searchViewModel.onSearchOpened();
+        searchNav.setVisibility(View.VISIBLE);
+        searchNav.setData(0, 0);
+        inputPanel.setVisibility(View.GONE);
+
+        for (int i = 0; i < menu.size(); i++) {
+          if (!menu.getItem(i).equals(searchViewItem)) {
+            menu.getItem(i).setVisible(false);
+          }
+        }
+        return true;
+      }
+
+      @Override
+      public boolean onMenuItemActionCollapse(MenuItem item) {
+        searchView.setOnQueryTextListener(null);
+        searchViewModel.onSearchClosed();
+        searchNav.setVisibility(View.GONE);
+        inputPanel.setVisibility(View.VISIBLE);
+        fragment.onSearchQueryUpdated(null);
+        invalidateOptionsMenu();
+        return true;
+      }
+    });
+
     super.onPrepareOptionsMenu(menu);
     return true;
   }
@@ -655,6 +714,7 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
     case R.id.menu_call_insecure:             handleDial(getRecipient(), false);                 return true;
     case R.id.menu_view_media:                handleViewMedia();                                 return true;
     case R.id.menu_add_shortcut:              handleAddShortcut();                               return true;
+    case R.id.menu_search:                    handleSearch();                                    return true;
     case R.id.menu_add_to_contacts:           handleAddToContacts();                             return true;
     case R.id.menu_reset_secure_session:      handleResetSecureSession();                        return true;
     case R.id.menu_group_recipients:          handleDisplayGroupRecipients();                    return true;
@@ -920,6 +980,10 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
     }.execute();
   }
 
+  private void handleSearch() {
+    searchViewModel.onSearchOpened();
+  }
+
   private void handleLeavePushGroup() {
     if (getRecipient() == null) {
       Toast.makeText(this, getString(R.string.ConversationActivity_invalid_recipient),
@@ -1438,6 +1502,7 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
     quickAttachmentToggle  = ViewUtil.findById(this, R.id.quick_attachment_toggle);
     inlineAttachmentToggle = ViewUtil.findById(this, R.id.inline_attachment_container);
     inputPanel             = ViewUtil.findById(this, R.id.bottom_panel);
+    searchNav              = ViewUtil.findById(this, R.id.conversation_search_nav);
 
     ImageButton quickCameraToggle      = ViewUtil.findById(this, R.id.quick_camera_toggle);
     ImageButton inlineAttachmentButton = ViewUtil.findById(this, R.id.inline_attachment_button);
@@ -1489,6 +1554,8 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       quickCameraToggle.setEnabled(false);
     }
 
+    searchNav.setEventListener(this);
+
     inlineAttachmentButton.setOnClickListener(v -> handleAddAttachment());
   }
 
@@ -1544,6 +1611,30 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
     });
   }
 
+  private void initializeSearchObserver() {
+    searchViewModel = ViewModelProviders.of(this).get(ConversationSearchViewModel.class);
+
+    searchViewModel.getSearchResults().observe(this, result -> {
+      if (result == null) return;
+
+      if (!result.getResults().isEmpty()) {
+        MessageResult messageResult = result.getResults().get(result.getPosition());
+        fragment.jumpToMessage(messageResult.messageRecipient.getAddress(), messageResult.receivedTimestampMs, searchViewModel::onMissingResult);
+      }
+
+      searchNav.setData(result.getPosition(), result.getResults().size());
+    });
+  }
+
+  @Override
+  public void onSearchMoveUpPressed() {
+    searchViewModel.onMoveUp();
+  }
+
+  @Override
+  public void onSearchMoveDownPressed() {
+    searchViewModel.onMoveDown();
+  }
 
   private void initializeProfiles() {
     if (!isSecureText) {
@@ -1569,7 +1660,10 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       updateReminders(recipient.hasSeenInviteReminder());
       updateDefaultSubscriptionId(recipient.getDefaultSubscriptionId());
       initializeSecurity(isSecureText, isDefaultSms);
-      invalidateOptionsMenu();
+
+      if (!searchViewItem.isActionViewExpanded()) {
+        invalidateOptionsMenu();
+      }
     });
   }
 
@@ -2445,6 +2539,11 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
     }
   }
 
+  @Override
+  public void onMessageActionToolbarOpened() {
+    searchViewItem.collapseActionView();
+  }
+
   @Override
   public void onAttachmentChanged() {
     handleSecurityChange(isSecureText, isDefaultSms);
diff --git a/src/org/thoughtcrime/securesms/conversation/ConversationAdapter.java b/src/org/thoughtcrime/securesms/conversation/ConversationAdapter.java
index 5ddace0fea..ab1887716a 100644
--- a/src/org/thoughtcrime/securesms/conversation/ConversationAdapter.java
+++ b/src/org/thoughtcrime/securesms/conversation/ConversationAdapter.java
@@ -105,6 +105,7 @@ public class ConversationAdapter <V extends View & BindableConversationItem>
   private final @NonNull  MessageDigest     digest;
 
   private MessageRecord recordToPulseHighlight;
+  private String        searchQuery;
 
   protected static class ViewHolder extends RecyclerView.ViewHolder {
     public <V extends View & BindableConversationItem> ViewHolder(final @NonNull V itemView) {
@@ -205,6 +206,7 @@ public class ConversationAdapter <V extends View & BindableConversationItem>
                               locale,
                               batchSelected,
                               recipient,
+                              searchQuery,
                               messageRecord == recordToPulseHighlight);
 
     if (messageRecord == recordToPulseHighlight) {
@@ -363,6 +365,11 @@ public class ConversationAdapter <V extends View & BindableConversationItem>
     }
   }
 
+  public void onSearchQueryUpdated(@Nullable String query) {
+    this.searchQuery = query;
+    notifyDataSetChanged();
+  }
+
   private boolean hasAudio(MessageRecord messageRecord) {
     return messageRecord.isMms() && ((MmsMessageRecord)messageRecord).getSlideDeck().getAudioSlide() != null;
   }
diff --git a/src/org/thoughtcrime/securesms/conversation/ConversationFragment.java b/src/org/thoughtcrime/securesms/conversation/ConversationFragment.java
index 0322ed86a5..58ebf6dbf2 100644
--- a/src/org/thoughtcrime/securesms/conversation/ConversationFragment.java
+++ b/src/org/thoughtcrime/securesms/conversation/ConversationFragment.java
@@ -27,6 +27,7 @@ import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.ActivityOptionsCompat;
 import android.support.v4.app.Fragment;
@@ -49,6 +50,7 @@ import org.thoughtcrime.securesms.ShareActivity;
 import org.thoughtcrime.securesms.attachments.Attachment;
 import org.thoughtcrime.securesms.components.ConversationTypingView;
 import org.thoughtcrime.securesms.components.recyclerview.SmoothScrollingLinearLayoutManager;
+import org.thoughtcrime.securesms.database.Address;
 import org.thoughtcrime.securesms.linkpreview.LinkPreview;
 import org.thoughtcrime.securesms.logging.Log;
 
@@ -94,6 +96,7 @@ import org.thoughtcrime.securesms.util.StickyHeaderDecoration;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.ViewUtil;
+import org.thoughtcrime.securesms.util.concurrent.SimpleTask;
 import org.thoughtcrime.securesms.util.task.ProgressDialogAsyncTask;
 import org.whispersystems.libsignal.util.guava.Optional;
 
@@ -126,6 +129,7 @@ public class ConversationFragment extends Fragment
   private long                        lastSeen;
   private int                         startingPosition;
   private int                         previousOffset;
+  private int                         activeOffset;
   private boolean                     firstLoad;
   private long                        loaderStartTime;
   private ActionMode                  actionMode;
@@ -631,9 +635,14 @@ public class ConversationFragment extends Fragment
 
     if (loader.hasOffset()) {
       adapter.setHeaderView(bottomLoadMoreView);
+    }
+
+    if (firstLoad || loader.hasOffset()) {
       previousOffset = loader.getOffset();
     }
 
+    activeOffset = loader.getOffset();
+
     adapter.changeCursor(cursor);
 
     int lastSeenPosition = adapter.findLastSeenPosition(lastSeen);
@@ -734,9 +743,42 @@ public class ConversationFragment extends Fragment
     return firstVisiblePosition == 0 && list.getChildAt(0).getBottom() <= list.getHeight();
   }
 
+  public void onSearchQueryUpdated(@Nullable String query) {
+    getListAdapter().onSearchQueryUpdated(query);
+  }
+
+  public void jumpToMessage(@NonNull Address author, long timestamp, @Nullable Runnable onMessageNotFound) {
+    SimpleTask.run(getLifecycle(), () -> {
+      return DatabaseFactory.getMmsSmsDatabase(getContext())
+                            .getMessagePositionInConversation(threadId, timestamp, author);
+    }, p -> moveToMessagePosition(p, onMessageNotFound));
+  }
+
+  private void moveToMessagePosition(int position, @Nullable Runnable onMessageNotFound) {
+    Log.d(TAG, "Moving to message position: " + position + "  activeOffset: " + activeOffset + "  cursorCount: " + getListAdapter().getCursorCount());
+
+    if (position >= activeOffset && position >= 0 && position < getListAdapter().getCursorCount()) {
+      int offset = activeOffset > 0 ? activeOffset - 1 : 0;
+      list.scrollToPosition(position - offset);
+      getListAdapter().pulseHighlightItem(position - offset);
+    } else if (position < 0) {
+      Log.w(TAG, "Tried to navigate to message, but it wasn't found.");
+      if (onMessageNotFound != null) {
+        onMessageNotFound.run();
+      }
+    } else {
+      Log.i(TAG, "Message was outside of the loaded range. Need to restart the loader.");
+
+      firstLoad        = true;
+      startingPosition = position;
+      getLoaderManager().restartLoader(0, Bundle.EMPTY, ConversationFragment.this);
+    }
+  }
+
   public interface ConversationFragmentListener {
     void setThreadId(long threadId);
     void handleReplyMessage(MessageRecord messageRecord);
+    void onMessageActionToolbarOpened();
   }
 
   private class ConversationScrollListener extends OnScrollListener {
@@ -848,41 +890,14 @@ public class ConversationFragment extends Fragment
         return;
       }
 
-      new AsyncTask<Void, Void, Integer>() {
-        @Override
-        protected Integer doInBackground(Void... voids) {
-          if (getActivity() == null || getActivity().isFinishing()) {
-            Log.w(TAG, "Task to retrieve quote position started after the fragment was detached.");
-            return 0;
-          }
-          return DatabaseFactory.getMmsSmsDatabase(getContext())
-                                .getQuotedMessagePosition(threadId,
-                                                          messageRecord.getQuote().getId(),
-                                                          messageRecord.getQuote().getAuthor());
-        }
-
-        @Override
-        protected void onPostExecute(Integer position) {
-          if (getActivity() == null || getActivity().isFinishing()) {
-            Log.w(TAG, "Task to retrieve quote position finished after the fragment was detached.");
-            return;
-          }
-
-          if (position >= 0 && position < getListAdapter().getItemCount()) {
-            list.scrollToPosition(position);
-            getListAdapter().pulseHighlightItem(position);
-          } else if (position < 0) {
-            Log.w(TAG, "Tried to navigate to quoted message, but it was deleted.");
-            Toast.makeText(getContext(), R.string.ConversationFragment_quoted_message_no_longer_available, Toast.LENGTH_SHORT).show();
-          } else {
-            Log.i(TAG, "Quoted message was outside of the loaded range. Need to restart the loader.");
-
-            firstLoad        = true;
-            startingPosition = position;
-            getLoaderManager().restartLoader(0, Bundle.EMPTY, ConversationFragment.this);
-          }
-        }
-      }.execute();
+      SimpleTask.run(getLifecycle(), () -> {
+        return DatabaseFactory.getMmsSmsDatabase(getContext())
+                              .getQuotedMessagePosition(threadId,
+                                                        messageRecord.getQuote().getId(),
+                                                        messageRecord.getQuote().getAuthor());
+      }, p -> moveToMessagePosition(p, () -> {
+        Toast.makeText(getContext(), R.string.ConversationFragment_quoted_message_no_longer_available, Toast.LENGTH_SHORT).show();
+      }));
     }
 
     @Override
@@ -965,6 +980,7 @@ public class ConversationFragment extends Fragment
       }
 
       setCorrectMenuVisibility(menu);
+      listener.onMessageActionToolbarOpened();
       return true;
     }
 
diff --git a/src/org/thoughtcrime/securesms/conversation/ConversationItem.java b/src/org/thoughtcrime/securesms/conversation/ConversationItem.java
index 008fc8fee7..5b80465d20 100644
--- a/src/org/thoughtcrime/securesms/conversation/ConversationItem.java
+++ b/src/org/thoughtcrime/securesms/conversation/ConversationItem.java
@@ -28,9 +28,12 @@ import android.support.annotation.DimenRes;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AlertDialog;
+import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.Spanned;
 import android.text.TextUtils;
+import android.text.style.BackgroundColorSpan;
+import android.text.style.ForegroundColorSpan;
 import android.text.style.URLSpan;
 import android.text.util.Linkify;
 import android.util.AttributeSet;
@@ -87,6 +90,7 @@ import org.thoughtcrime.securesms.util.DateUtils;
 import org.thoughtcrime.securesms.util.DynamicTheme;
 import org.thoughtcrime.securesms.util.LongClickCopySpan;
 import org.thoughtcrime.securesms.util.LongClickMovementMethod;
+import org.thoughtcrime.securesms.util.SearchUtil;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.ViewUtil;
@@ -206,6 +210,7 @@ public class ConversationItem extends LinearLayout
                    @NonNull Locale                  locale,
                    @NonNull Set<MessageRecord>      batchSelected,
                    @NonNull Recipient               conversationRecipient,
+                   @Nullable String                 searchQuery,
                             boolean                 pulseHighlight)
   {
     this.messageRecord          = messageRecord;
@@ -223,7 +228,7 @@ public class ConversationItem extends LinearLayout
     setMessageShape(messageRecord, previousMessageRecord, nextMessageRecord, groupThread);
     setMediaAttributes(messageRecord, previousMessageRecord, nextMessageRecord, conversationRecipient, groupThread);
     setInteractionState(messageRecord, pulseHighlight);
-    setBodyText(messageRecord);
+    setBodyText(messageRecord, searchQuery);
     setBubbleState(messageRecord);
     setStatusIcons(messageRecord);
     setContactPhoto(recipient);
@@ -401,7 +406,7 @@ public class ConversationItem extends LinearLayout
     return messageRecord.isMms() && !((MmsMessageRecord)messageRecord).getLinkPreviews().isEmpty();
   }
 
-  private void setBodyText(MessageRecord messageRecord) {
+  private void setBodyText(MessageRecord messageRecord, @Nullable String searchQuery) {
     bodyText.setClickable(false);
     bodyText.setFocusable(false);
     bodyText.setTextSize(TypedValue.COMPLEX_UNIT_SP, TextSecurePreferences.getMessageBodyTextSize(context));
@@ -409,7 +414,11 @@ public class ConversationItem extends LinearLayout
     if (isCaptionlessMms(messageRecord)) {
       bodyText.setVisibility(View.GONE);
     } else {
-      bodyText.setText(linkifyMessageBody(messageRecord.getDisplayBody(), batchSelected.isEmpty()));
+      Spannable styledText = linkifyMessageBody(messageRecord.getDisplayBody(), batchSelected.isEmpty());
+      styledText = SearchUtil.getHighlightedSpan(locale, () -> new BackgroundColorSpan(Color.YELLOW), styledText, searchQuery);
+      styledText = SearchUtil.getHighlightedSpan(locale, () -> new ForegroundColorSpan(Color.BLACK), styledText, searchQuery);
+
+      bodyText.setText(styledText);
       bodyText.setVisibility(View.VISIBLE);
     }
   }
diff --git a/src/org/thoughtcrime/securesms/conversation/ConversationSearchViewModel.java b/src/org/thoughtcrime/securesms/conversation/ConversationSearchViewModel.java
new file mode 100644
index 0000000000..8e48ac18fd
--- /dev/null
+++ b/src/org/thoughtcrime/securesms/conversation/ConversationSearchViewModel.java
@@ -0,0 +1,147 @@
+package org.thoughtcrime.securesms.conversation;
+
+import android.app.Application;
+import android.arch.lifecycle.AndroidViewModel;
+import android.arch.lifecycle.LiveData;
+import android.content.Context;
+import android.os.AsyncTask;
+import android.support.annotation.NonNull;
+
+import org.thoughtcrime.securesms.contacts.ContactAccessor;
+import org.thoughtcrime.securesms.database.CursorList;
+import org.thoughtcrime.securesms.database.DatabaseFactory;
+import org.thoughtcrime.securesms.search.SearchRepository;
+import org.thoughtcrime.securesms.search.model.MessageResult;
+import org.thoughtcrime.securesms.util.CloseableLiveData;
+import org.thoughtcrime.securesms.util.Debouncer;
+import org.thoughtcrime.securesms.util.Util;
+
+import java.io.Closeable;
+import java.util.List;
+
+public class ConversationSearchViewModel extends AndroidViewModel {
+
+  private final SearchRepository                searchRepository;
+  private final CloseableLiveData<SearchResult> result;
+  private final Debouncer                       debouncer;
+
+  private boolean firstSearch;
+  private boolean searchOpen;
+  private String  activeQuery;
+  private long    activeThreadId;
+
+  public ConversationSearchViewModel(@NonNull Application application) {
+    super(application);
+    Context context = application.getApplicationContext();
+    result           = new CloseableLiveData<>();
+    debouncer        = new Debouncer(500);
+    searchRepository = new SearchRepository(context,
+                                            DatabaseFactory.getSearchDatabase(context),
+                                            DatabaseFactory.getContactsDatabase(context),
+                                            DatabaseFactory.getThreadDatabase(context),
+                                            ContactAccessor.getInstance(),
+                                            AsyncTask.THREAD_POOL_EXECUTOR);
+  }
+
+  LiveData<SearchResult> getSearchResults() {
+    return result;
+  }
+
+  void onQueryUpdated(@NonNull String query, long threadId) {
+    if (firstSearch && query.length() < 2) {
+      result.postValue(new SearchResult(CursorList.emptyList(), 0));
+      return;
+    }
+
+    if (query.equals(activeQuery)) {
+      return;
+    }
+
+    updateQuery(query, threadId);
+  }
+
+  void onMissingResult() {
+    if (activeQuery != null) {
+      updateQuery(activeQuery, activeThreadId);
+    }
+  }
+
+  void onMoveUp() {
+    debouncer.clear();
+
+    CursorList<MessageResult> messages = (CursorList<MessageResult>) result.getValue().getResults();
+    int                       position = Math.min(result.getValue().getPosition() + 1, messages.size() - 1);
+
+    result.setValue(new SearchResult(messages, position), false);
+  }
+
+  void onMoveDown() {
+    debouncer.clear();
+
+    CursorList<MessageResult> messages = (CursorList<MessageResult>) result.getValue().getResults();
+    int                       position = Math.max(result.getValue().getPosition() - 1, 0);
+
+    result.setValue(new SearchResult(messages, position), false);
+  }
+
+
+  void onSearchOpened() {
+    searchOpen  = true;
+    firstSearch = true;
+  }
+
+  void onSearchClosed() {
+    searchOpen = false;
+    debouncer.clear();
+    result.close();
+  }
+
+  @Override
+  protected void onCleared() {
+    super.onCleared();
+    result.close();
+  }
+
+  private void updateQuery(@NonNull String query, long threadId) {
+    activeQuery    = query;
+    activeThreadId = threadId;
+
+    debouncer.publish(() -> {
+      firstSearch = false;
+
+      searchRepository.query(query, threadId, messages -> {
+        Util.runOnMain(() -> {
+          if (searchOpen && query.equals(activeQuery)) {
+            result.setValue(new SearchResult(messages, 0));
+          } else {
+            messages.close();
+          }
+        });
+      });
+    });
+  }
+
+  static class SearchResult implements Closeable {
+
+    private final CursorList<MessageResult> results;
+    private final int                       position;
+
+    SearchResult(CursorList<MessageResult> results, int position) {
+      this.results  = results;
+      this.position = position;
+    }
+
+    public List<MessageResult> getResults() {
+      return results;
+    }
+
+    public int getPosition() {
+      return position;
+    }
+
+    @Override
+    public void close() {
+      results.close();
+    }
+  }
+}
diff --git a/src/org/thoughtcrime/securesms/conversation/ConversationUpdateItem.java b/src/org/thoughtcrime/securesms/conversation/ConversationUpdateItem.java
index 27f3442e59..e2985d5085 100644
--- a/src/org/thoughtcrime/securesms/conversation/ConversationUpdateItem.java
+++ b/src/org/thoughtcrime/securesms/conversation/ConversationUpdateItem.java
@@ -79,6 +79,7 @@ public class ConversationUpdateItem extends LinearLayout
                    @NonNull Locale                  locale,
                    @NonNull Set<MessageRecord>      batchSelected,
                    @NonNull Recipient               conversationRecipient,
+                   @Nullable String                 searchQuery,
                             boolean                 pulseUpdate)
   {
     this.batchSelected = batchSelected;
diff --git a/src/org/thoughtcrime/securesms/database/CursorList.java b/src/org/thoughtcrime/securesms/database/CursorList.java
index 4d1436f367..f53aa3b3d8 100644
--- a/src/org/thoughtcrime/securesms/database/CursorList.java
+++ b/src/org/thoughtcrime/securesms/database/CursorList.java
@@ -30,6 +30,8 @@ public class CursorList<T> implements List<T>, Closeable {
   public CursorList(@NonNull Cursor cursor, @NonNull ModelBuilder<T> modelBuilder) {
     this.cursor       = cursor;
     this.modelBuilder = modelBuilder;
+
+    forceQueryLoad();
   }
 
   public static <T> CursorList<T> emptyList() {
@@ -195,6 +197,10 @@ public class CursorList<T> implements List<T>, Closeable {
     cursor.unregisterContentObserver(observer);
   }
 
+  private void forceQueryLoad() {
+    cursor.getCount();
+  }
+
   public interface ModelBuilder<T> {
     T build(@NonNull Cursor cursor);
   }
diff --git a/src/org/thoughtcrime/securesms/database/CursorRecyclerViewAdapter.java b/src/org/thoughtcrime/securesms/database/CursorRecyclerViewAdapter.java
index fec67b20c5..f815e900de 100644
--- a/src/org/thoughtcrime/securesms/database/CursorRecyclerViewAdapter.java
+++ b/src/org/thoughtcrime/securesms/database/CursorRecyclerViewAdapter.java
@@ -124,6 +124,10 @@ public abstract class CursorRecyclerViewAdapter<VH extends RecyclerView.ViewHold
            + (hasFooterView() ? 1 : 0);
   }
 
+  public int getCursorCount() {
+    return cursor.getCount();
+  }
+
   @SuppressWarnings("unchecked")
   @Override
   public final void onViewRecycled(ViewHolder holder) {
@@ -190,7 +194,7 @@ public abstract class CursorRecyclerViewAdapter<VH extends RecyclerView.ViewHold
       throw new IllegalStateException("this should only be called when the cursor is valid");
     }
     if (!cursor.moveToPosition(getCursorPosition(position))) {
-      throw new IllegalStateException("couldn't move cursor to position " + position);
+      throw new IllegalStateException("couldn't move cursor to position " + position + " (actual cursor position " + getCursorPosition(position) + ")");
     }
     return cursor;
   }
diff --git a/src/org/thoughtcrime/securesms/database/MmsSmsDatabase.java b/src/org/thoughtcrime/securesms/database/MmsSmsDatabase.java
index d1881977a9..cbe9231d71 100644
--- a/src/org/thoughtcrime/securesms/database/MmsSmsDatabase.java
+++ b/src/org/thoughtcrime/securesms/database/MmsSmsDatabase.java
@@ -183,6 +183,26 @@ public class MmsSmsDatabase extends Database {
     return -1;
   }
 
+  public int getMessagePositionInConversation(long threadId, long receivedTimestamp, @NonNull Address address) {
+    String order     = MmsSmsColumns.NORMALIZED_DATE_RECEIVED + " DESC";
+    String selection = MmsSmsColumns.THREAD_ID + " = " + threadId;
+
+    try (Cursor cursor = queryTables(new String[]{ MmsSmsColumns.NORMALIZED_DATE_RECEIVED, MmsSmsColumns.ADDRESS }, selection, order, null)) {
+      String  serializedAddress = address.serialize();
+      boolean isOwnNumber       = Util.isOwnNumber(context, address);
+
+      while (cursor != null && cursor.moveToNext()) {
+        boolean timestampMatches = cursor.getLong(0) == receivedTimestamp;
+        boolean addressMatches   = serializedAddress.equals(cursor.getString(1));
+
+        if (timestampMatches && (addressMatches || isOwnNumber)) {
+          return cursor.getPosition();
+        }
+      }
+    }
+    return -1;
+  }
+
   /**
    * Retrieves the position of the message with the provided timestamp in the query results you'd
    * get from calling {@link #getConversation(long)}.
diff --git a/src/org/thoughtcrime/securesms/database/SearchDatabase.java b/src/org/thoughtcrime/securesms/database/SearchDatabase.java
index 7724e46734..a90460aa7c 100644
--- a/src/org/thoughtcrime/securesms/database/SearchDatabase.java
+++ b/src/org/thoughtcrime/securesms/database/SearchDatabase.java
@@ -21,78 +21,122 @@ public class SearchDatabase extends Database {
   public static final String SMS_FTS_TABLE_NAME = "sms_fts";
   public static final String MMS_FTS_TABLE_NAME = "mms_fts";
 
-  public static final String ID      = "rowid";
-  public static final String BODY    = MmsSmsColumns.BODY;
-  public static final String RANK    = "rank";
-  public static final String SNIPPET = "snippet";
+  public static final String ID                   = "rowid";
+  public static final String BODY                 = MmsSmsColumns.BODY;
+  public static final String THREAD_ID            = MmsSmsColumns.THREAD_ID;
+  public static final String SNIPPET              = "snippet";
+  public static final String CONVERSATION_ADDRESS = "conversation_address";
+  public static final String MESSAGE_ADDRESS      = "message_address";
 
   public static final String[] CREATE_TABLE = {
-      "CREATE VIRTUAL TABLE " + SMS_FTS_TABLE_NAME + " USING fts5(" + BODY + ", content=" + SmsDatabase.TABLE_NAME + ", content_rowid=" + SmsDatabase.ID + ");",
+      "CREATE VIRTUAL TABLE " + SMS_FTS_TABLE_NAME + " USING fts5(" + BODY + ", " + THREAD_ID + " UNINDEXED, content=" + SmsDatabase.TABLE_NAME + ", content_rowid=" + SmsDatabase.ID + ");",
 
       "CREATE TRIGGER sms_ai AFTER INSERT ON " + SmsDatabase.TABLE_NAME + " BEGIN\n" +
-          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ") VALUES (new." + SmsDatabase.ID + ", new." + SmsDatabase.BODY + ");\n" +
+          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES (new." + SmsDatabase.ID + ", new." + SmsDatabase.BODY + ", new." + SmsDatabase.THREAD_ID + ");\n" +
           "END;\n",
       "CREATE TRIGGER sms_ad AFTER DELETE ON " + SmsDatabase.TABLE_NAME + " BEGIN\n" +
-          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + SMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ") VALUES('delete', old." + SmsDatabase.ID + ", old." + SmsDatabase.BODY + ");\n" +
+          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + SMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES('delete', old." + SmsDatabase.ID + ", old." + SmsDatabase.BODY + ", old." + SmsDatabase.THREAD_ID + ");\n" +
           "END;\n",
       "CREATE TRIGGER sms_au AFTER UPDATE ON " + SmsDatabase.TABLE_NAME + " BEGIN\n" +
-          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + SMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ") VALUES('delete', old." + SmsDatabase.ID + ", old." + SmsDatabase.BODY + ");\n" +
-          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ") VALUES(new." + SmsDatabase.ID + ", new." + SmsDatabase.BODY + ");\n" +
+          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + SMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES('delete', old." + SmsDatabase.ID + ", old." + SmsDatabase.BODY + ", old." + SmsDatabase.THREAD_ID + ");\n" +
+          "  INSERT INTO " + SMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES(new." + SmsDatabase.ID + ", new." + SmsDatabase.BODY + ", new." + SmsDatabase.THREAD_ID + ");\n" +
           "END;",
 
 
-      "CREATE VIRTUAL TABLE " + MMS_FTS_TABLE_NAME + " USING fts5(" + BODY + ", content=" + MmsDatabase.TABLE_NAME + ", content_rowid=" + MmsDatabase.ID + ");",
+      "CREATE VIRTUAL TABLE " + MMS_FTS_TABLE_NAME + " USING fts5(" + BODY + ", " + THREAD_ID + " UNINDEXED, content=" + MmsDatabase.TABLE_NAME + ", content_rowid=" + MmsDatabase.ID + ");",
 
       "CREATE TRIGGER mms_ai AFTER INSERT ON " + MmsDatabase.TABLE_NAME + " BEGIN\n" +
-          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ") VALUES (new." + MmsDatabase.ID + ", new." + MmsDatabase.BODY + ");\n" +
+          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES (new." + MmsDatabase.ID + ", new." + MmsDatabase.BODY + ", new." + MmsDatabase.THREAD_ID + ");\n" +
           "END;\n",
       "CREATE TRIGGER mms_ad AFTER DELETE ON " + MmsDatabase.TABLE_NAME + " BEGIN\n" +
-          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + MMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ") VALUES('delete', old." + MmsDatabase.ID + ", old." + MmsDatabase.BODY + ");\n" +
+          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + MMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES('delete', old." + MmsDatabase.ID + ", old." + MmsDatabase.BODY + ", old." + MmsDatabase.THREAD_ID + ");\n" +
           "END;\n",
       "CREATE TRIGGER mms_au AFTER UPDATE ON " + MmsDatabase.TABLE_NAME + " BEGIN\n" +
-          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + MMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ") VALUES('delete', old." + MmsDatabase.ID + ", old." + MmsDatabase.BODY + ");\n" +
-          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ") VALUES (new." + MmsDatabase.ID + ", new." + MmsDatabase.BODY + ");\n" +
+          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + MMS_FTS_TABLE_NAME + ", " + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES('delete', old." + MmsDatabase.ID + ", old." + MmsDatabase.BODY + ", old." + MmsDatabase.THREAD_ID + ");\n" +
+          "  INSERT INTO " + MMS_FTS_TABLE_NAME + "(" + ID + ", " + BODY + ", " + THREAD_ID + ") VALUES (new." + MmsDatabase.ID + ", new." + MmsDatabase.BODY + ", new." + MmsDatabase.THREAD_ID + ");\n" +
           "END;"
   };
 
   private static final String MESSAGES_QUERY =
       "SELECT " +
-        ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ADDRESS + ", " +
+        ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ADDRESS + " AS " + CONVERSATION_ADDRESS + ", " +
+        MmsSmsColumns.ADDRESS + " AS " + MESSAGE_ADDRESS + ", " +
         "snippet(" + SMS_FTS_TABLE_NAME + ", -1, '', '', '...', 7) AS " + SNIPPET + ", " +
         SmsDatabase.TABLE_NAME + "." + SmsDatabase.DATE_RECEIVED + " AS " + MmsSmsColumns.NORMALIZED_DATE_RECEIVED + ", " +
-        MmsSmsColumns.THREAD_ID + " " +
+        SMS_FTS_TABLE_NAME + "."  + THREAD_ID + " " +
       "FROM " + SmsDatabase.TABLE_NAME + " " +
       "INNER JOIN " + SMS_FTS_TABLE_NAME + " ON " + SMS_FTS_TABLE_NAME + "." + ID + " = " + SmsDatabase.TABLE_NAME + "." + SmsDatabase.ID + " " +
-      "INNER JOIN " + ThreadDatabase.TABLE_NAME + " ON " + SmsDatabase.TABLE_NAME + "." + MmsSmsColumns.THREAD_ID + " = " + ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ID + " " +
+      "INNER JOIN " + ThreadDatabase.TABLE_NAME + " ON " + SMS_FTS_TABLE_NAME + "." + THREAD_ID + " = " + ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ID + " " +
       "WHERE " + SMS_FTS_TABLE_NAME + " MATCH ? " +
       "UNION ALL " +
       "SELECT " +
-        ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ADDRESS + ", " +
+        ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ADDRESS + " AS " + CONVERSATION_ADDRESS + ", " +
+        MmsSmsColumns.ADDRESS + " AS " + MESSAGE_ADDRESS + ", " +
         "snippet(" + MMS_FTS_TABLE_NAME + ", -1, '', '', '...', 7) AS " + SNIPPET + ", " +
         MmsDatabase.TABLE_NAME + "." + MmsDatabase.DATE_RECEIVED + " AS " + MmsSmsColumns.NORMALIZED_DATE_RECEIVED + ", " +
-        MmsSmsColumns.THREAD_ID + " " +
+        MMS_FTS_TABLE_NAME + "." + THREAD_ID + " " +
       "FROM " + MmsDatabase.TABLE_NAME + " " +
       "INNER JOIN " + MMS_FTS_TABLE_NAME + " ON " + MMS_FTS_TABLE_NAME + "." + ID + " = " + MmsDatabase.TABLE_NAME + "." + MmsDatabase.ID + " " +
-      "INNER JOIN " + ThreadDatabase.TABLE_NAME + " ON " + MmsDatabase.TABLE_NAME + "." + MmsSmsColumns.THREAD_ID + " = " + ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ID + " " +
+      "INNER JOIN " + ThreadDatabase.TABLE_NAME + " ON " + MMS_FTS_TABLE_NAME + "." + THREAD_ID + " = " + ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ID + " " +
       "WHERE " + MMS_FTS_TABLE_NAME + " MATCH ? " +
       "ORDER BY " + MmsSmsColumns.NORMALIZED_DATE_RECEIVED + " DESC " +
       "LIMIT 500";
 
+  private static final String MESSAGES_FOR_THREAD_QUERY =
+      "SELECT " +
+          ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ADDRESS + " AS " + CONVERSATION_ADDRESS + ", " +
+          MmsSmsColumns.ADDRESS + " AS " + MESSAGE_ADDRESS + ", " +
+          "snippet(" + SMS_FTS_TABLE_NAME + ", -1, '', '', '...', 7) AS " + SNIPPET + ", " +
+          SmsDatabase.TABLE_NAME + "." + SmsDatabase.DATE_RECEIVED + " AS " + MmsSmsColumns.NORMALIZED_DATE_RECEIVED + ", " +
+          SMS_FTS_TABLE_NAME + "." + THREAD_ID + " " +
+        "FROM " + SmsDatabase.TABLE_NAME + " " +
+        "INNER JOIN " + SMS_FTS_TABLE_NAME + " ON " + SMS_FTS_TABLE_NAME + "." + ID + " = " + SmsDatabase.TABLE_NAME + "." + SmsDatabase.ID + " " +
+        "INNER JOIN " + ThreadDatabase.TABLE_NAME + " ON " + SMS_FTS_TABLE_NAME + "." + THREAD_ID + " = " + ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ID + " " +
+        "WHERE " + SMS_FTS_TABLE_NAME + " MATCH ? AND " + SmsDatabase.TABLE_NAME + "." + MmsSmsColumns.THREAD_ID + " = ? " +
+        "UNION ALL " +
+        "SELECT " +
+          ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ADDRESS + " AS " + CONVERSATION_ADDRESS + ", " +
+          MmsSmsColumns.ADDRESS + " AS " + MESSAGE_ADDRESS + ", " +
+          "snippet(" + MMS_FTS_TABLE_NAME + ", -1, '', '', '...', 7) AS " + SNIPPET + ", " +
+          MmsDatabase.TABLE_NAME + "." + MmsDatabase.DATE_RECEIVED + " AS " + MmsSmsColumns.NORMALIZED_DATE_RECEIVED + ", " +
+          MMS_FTS_TABLE_NAME + "." + THREAD_ID + " " +
+        "FROM " + MmsDatabase.TABLE_NAME + " " +
+        "INNER JOIN " + MMS_FTS_TABLE_NAME + " ON " + MMS_FTS_TABLE_NAME + "." + ID + " = " + MmsDatabase.TABLE_NAME + "." + MmsDatabase.ID + " " +
+        "INNER JOIN " + ThreadDatabase.TABLE_NAME + " ON " + MMS_FTS_TABLE_NAME + "." + THREAD_ID + " = " + ThreadDatabase.TABLE_NAME + "." + ThreadDatabase.ID + " " +
+        "WHERE " + MMS_FTS_TABLE_NAME + " MATCH ? AND " + MmsDatabase.TABLE_NAME + "." + MmsSmsColumns.THREAD_ID + " = ? " +
+        "ORDER BY " + MmsSmsColumns.NORMALIZED_DATE_RECEIVED + " DESC " +
+        "LIMIT 500";
+
   public SearchDatabase(@NonNull Context context, @NonNull SQLCipherOpenHelper databaseHelper) {
     super(context, databaseHelper);
   }
 
   public Cursor queryMessages(@NonNull String query) {
-    SQLiteDatabase db = databaseHelper.getReadableDatabase();
+    SQLiteDatabase db          = databaseHelper.getReadableDatabase();
+    String         prefixQuery = adjustQuery(query);
+
+    Cursor cursor = db.rawQuery(MESSAGES_QUERY, new String[] { prefixQuery, prefixQuery });
+    setNotifyConverationListListeners(cursor);
+    return cursor;
+  }
+
+  public Cursor queryMessages(@NonNull String query, long threadId) {
+    SQLiteDatabase db          = databaseHelper.getReadableDatabase();
+    String         prefixQuery = adjustQuery(query);
 
+    Cursor cursor = db.rawQuery(MESSAGES_FOR_THREAD_QUERY, new String[] { prefixQuery, String.valueOf(threadId), prefixQuery, String.valueOf(threadId) });
+    setNotifyConverationListListeners(cursor);
+    return cursor;
+
+  }
+
+  private String adjustQuery(@NonNull String query) {
     List<String> tokens      = Stream.of(query.split(" ")).filter(s -> s.trim().length() > 0).toList();
     String       prefixQuery = Util.join(tokens, "* ");
 
     prefixQuery += "*";
 
-    Cursor cursor = db.rawQuery(MESSAGES_QUERY, new String[] { prefixQuery, prefixQuery });
-    setNotifyConverationListListeners(cursor);
-    return cursor;
+    return prefixQuery;
   }
 }
 
diff --git a/src/org/thoughtcrime/securesms/database/helpers/SQLCipherOpenHelper.java b/src/org/thoughtcrime/securesms/database/helpers/SQLCipherOpenHelper.java
index ed72faac2f..13e31fffc2 100644
--- a/src/org/thoughtcrime/securesms/database/helpers/SQLCipherOpenHelper.java
+++ b/src/org/thoughtcrime/securesms/database/helpers/SQLCipherOpenHelper.java
@@ -60,8 +60,9 @@ public class SQLCipherOpenHelper extends SQLiteOpenHelper {
   private static final int ATTACHMENT_CAPTIONS              = 14;
   private static final int ATTACHMENT_CAPTIONS_FIX          = 15;
   private static final int PREVIEWS                         = 16;
+  private static final int CONVERSATION_SEARCH              = 17;
 
-  private static final int    DATABASE_VERSION = 16;
+  private static final int    DATABASE_VERSION = 17;
   private static final String DATABASE_NAME    = "signal.db";
 
   private final Context        context;
@@ -201,9 +202,29 @@ public class SQLCipherOpenHelper extends SQLiteOpenHelper {
       }
 
       if (oldVersion < FULL_TEXT_SEARCH) {
-        for (String sql : SearchDatabase.CREATE_TABLE) {
-          db.execSQL(sql);
-        }
+        db.execSQL("CREATE VIRTUAL TABLE sms_fts USING fts5(body, content=sms, content_rowid=_id)");
+        db.execSQL("CREATE TRIGGER sms_ai AFTER INSERT ON sms BEGIN\n" +
+                   "  INSERT INTO sms_fts(rowid, body) VALUES (new._id, new.body);\n" +
+                   "END;");
+        db.execSQL("CREATE TRIGGER sms_ad AFTER DELETE ON sms BEGIN\n" +
+                   "  INSERT INTO sms_fts(sms_fts, rowid, body) VALUES('delete', old._id, old.body);\n" +
+                   "END;\n");
+        db.execSQL("CREATE TRIGGER sms_au AFTER UPDATE ON sms BEGIN\n" +
+                   "  INSERT INTO sms_fts(sms_fts, rowid, body) VALUES('delete', old._id, old.body);\n" +
+                   "  INSERT INTO sms_fts(rowid, body) VALUES(new._id, new.body);\n" +
+                   "END;");
+
+        db.execSQL("CREATE VIRTUAL TABLE mms_fts USING fts5(body, content=mms, content_rowid=_id)");
+        db.execSQL("CREATE TRIGGER mms_ai AFTER INSERT ON mms BEGIN\n" +
+                   "  INSERT INTO mms_fts(rowid, body) VALUES (new._id, new.body);\n" +
+                   "END;");
+        db.execSQL("CREATE TRIGGER mms_ad AFTER DELETE ON mms BEGIN\n" +
+                   "  INSERT INTO mms_fts(mms_fts, rowid, body) VALUES('delete', old._id, old.body);\n" +
+                   "END;\n");
+        db.execSQL("CREATE TRIGGER mms_au AFTER UPDATE ON mms BEGIN\n" +
+                   "  INSERT INTO mms_fts(mms_fts, rowid, body) VALUES('delete', old._id, old.body);\n" +
+                   "  INSERT INTO mms_fts(rowid, body) VALUES(new._id, new.body);\n" +
+                   "END;");
 
         Log.i(TAG, "Beginning to build search index.");
         long start = SystemClock.elapsedRealtime();
@@ -313,6 +334,55 @@ public class SQLCipherOpenHelper extends SQLiteOpenHelper {
         db.execSQL("ALTER TABLE mms ADD COLUMN previews TEXT");
       }
 
+      if (oldVersion < CONVERSATION_SEARCH) {
+        db.execSQL("DROP TABLE sms_fts");
+        db.execSQL("DROP TABLE mms_fts");
+        db.execSQL("DROP TRIGGER sms_ai");
+        db.execSQL("DROP TRIGGER sms_au");
+        db.execSQL("DROP TRIGGER sms_ad");
+        db.execSQL("DROP TRIGGER mms_ai");
+        db.execSQL("DROP TRIGGER mms_au");
+        db.execSQL("DROP TRIGGER mms_ad");
+
+        db.execSQL("CREATE VIRTUAL TABLE sms_fts USING fts5(body, thread_id UNINDEXED, content=sms, content_rowid=_id)");
+        db.execSQL("CREATE TRIGGER sms_ai AFTER INSERT ON sms BEGIN\n" +
+                   "  INSERT INTO sms_fts(rowid, body, thread_id) VALUES (new._id, new.body, new.thread_id);\n" +
+                   "END;");
+        db.execSQL("CREATE TRIGGER sms_ad AFTER DELETE ON sms BEGIN\n" +
+                   "  INSERT INTO sms_fts(sms_fts, rowid, body, thread_id) VALUES('delete', old._id, old.body, old.thread_id);\n" +
+                   "END;\n");
+        db.execSQL("CREATE TRIGGER sms_au AFTER UPDATE ON sms BEGIN\n" +
+                   "  INSERT INTO sms_fts(sms_fts, rowid, body, thread_id) VALUES('delete', old._id, old.body, old.thread_id);\n" +
+                   "  INSERT INTO sms_fts(rowid, body, thread_id) VALUES(new._id, new.body, new.thread_id);\n" +
+                   "END;");
+
+        db.execSQL("CREATE VIRTUAL TABLE mms_fts USING fts5(body, thread_id UNINDEXED, content=mms, content_rowid=_id)");
+        db.execSQL("CREATE TRIGGER mms_ai AFTER INSERT ON mms BEGIN\n" +
+                   "  INSERT INTO mms_fts(rowid, body, thread_id) VALUES (new._id, new.body, new.thread_id);\n" +
+                   "END;");
+        db.execSQL("CREATE TRIGGER mms_ad AFTER DELETE ON mms BEGIN\n" +
+                   "  INSERT INTO mms_fts(mms_fts, rowid, body, thread_id) VALUES('delete', old._id, old.body, old.thread_id);\n" +
+                   "END;\n");
+        db.execSQL("CREATE TRIGGER mms_au AFTER UPDATE ON mms BEGIN\n" +
+                   "  INSERT INTO mms_fts(mms_fts, rowid, body, thread_id) VALUES('delete', old._id, old.body, old.thread_id);\n" +
+                   "  INSERT INTO mms_fts(rowid, body, thread_id) VALUES(new._id, new.body, new.thread_id);\n" +
+                   "END;");
+
+        Log.i(TAG, "Beginning to build search index.");
+        long start = SystemClock.elapsedRealtime();
+
+        db.execSQL("INSERT INTO sms_fts (rowid, body, thread_id) SELECT _id, body, thread_id FROM sms");
+
+        long smsFinished = SystemClock.elapsedRealtime();
+        Log.i(TAG, "Indexing SMS completed in " + (smsFinished - start) + " ms");
+
+        db.execSQL("INSERT INTO mms_fts (rowid, body, thread_id) SELECT _id, body, thread_id FROM mms");
+
+        long mmsFinished = SystemClock.elapsedRealtime();
+        Log.i(TAG, "Indexing MMS completed in " + (mmsFinished - smsFinished) + " ms");
+        Log.i(TAG, "Indexing finished. Total time: " + (mmsFinished - start) + " ms");
+      }
+
       db.setTransactionSuccessful();
     } finally {
       db.endTransaction();
diff --git a/src/org/thoughtcrime/securesms/search/SearchFragment.java b/src/org/thoughtcrime/securesms/search/SearchFragment.java
index 579649a818..ad59cc7317 100644
--- a/src/org/thoughtcrime/securesms/search/SearchFragment.java
+++ b/src/org/thoughtcrime/securesms/search/SearchFragment.java
@@ -172,7 +172,7 @@ public class SearchFragment extends Fragment implements SearchListAdapter.EventL
         ConversationListActivity conversationList = (ConversationListActivity) getActivity();
         if (conversationList != null) {
           conversationList.openConversation(message.threadId,
-                                            message.recipient,
+                                            message.conversationRecipient,
                                             ThreadDatabase.DistributionTypes.DEFAULT,
                                             -1,
                                             startingPosition);
diff --git a/src/org/thoughtcrime/securesms/search/SearchRepository.java b/src/org/thoughtcrime/securesms/search/SearchRepository.java
index d837cdc4a0..a88107b211 100644
--- a/src/org/thoughtcrime/securesms/search/SearchRepository.java
+++ b/src/org/thoughtcrime/securesms/search/SearchRepository.java
@@ -19,11 +19,14 @@ import org.thoughtcrime.securesms.database.MmsSmsColumns;
 import org.thoughtcrime.securesms.database.SearchDatabase;
 import org.thoughtcrime.securesms.database.ThreadDatabase;
 import org.thoughtcrime.securesms.database.model.ThreadRecord;
+import org.thoughtcrime.securesms.logging.Log;
 import org.thoughtcrime.securesms.permissions.Permissions;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.search.model.MessageResult;
 import org.thoughtcrime.securesms.search.model.SearchResult;
+import org.thoughtcrime.securesms.util.Stopwatch;
 
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -32,7 +35,9 @@ import java.util.concurrent.Executor;
 /**
  * Manages data retrieval for search.
  */
-class SearchRepository {
+public class SearchRepository {
+
+  private static final String TAG = SearchRepository.class.getSimpleName();
 
   private static final Set<Character> BANNED_CHARACTERS = new HashSet<>();
   static {
@@ -58,12 +63,12 @@ class SearchRepository {
   private final ContactAccessor  contactAccessor;
   private final Executor         executor;
 
-  SearchRepository(@NonNull Context          context,
-                   @NonNull SearchDatabase   searchDatabase,
-                   @NonNull ContactsDatabase contactsDatabase,
-                   @NonNull ThreadDatabase   threadDatabase,
-                   @NonNull ContactAccessor  contactAccessor,
-                   @NonNull Executor         executor)
+  public SearchRepository(@NonNull Context context,
+                          @NonNull SearchDatabase searchDatabase,
+                          @NonNull ContactsDatabase contactsDatabase,
+                          @NonNull ThreadDatabase threadDatabase,
+                          @NonNull ContactAccessor contactAccessor,
+                          @NonNull Executor executor)
   {
     this.context          = context.getApplicationContext();
     this.searchDatabase   = searchDatabase;
@@ -73,22 +78,48 @@ class SearchRepository {
     this.executor         = executor;
   }
 
-  void query(@NonNull String query, @NonNull Callback callback) {
+  public void query(@NonNull String query, @NonNull Callback<SearchResult> callback) {
     if (TextUtils.isEmpty(query)) {
       callback.onResult(SearchResult.EMPTY);
       return;
     }
 
     executor.execute(() -> {
-      String                    cleanQuery    = sanitizeQuery(query);
-      CursorList<Recipient>     contacts      = queryContacts(cleanQuery);
-      CursorList<ThreadRecord>  conversations = queryConversations(cleanQuery);
-      CursorList<MessageResult> messages      = queryMessages(cleanQuery);
+      Stopwatch timer = new Stopwatch("FtsQuery");
+
+      String cleanQuery = sanitizeQuery(query);
+      timer.split("clean");
+
+      CursorList<Recipient> contacts = queryContacts(cleanQuery);
+      timer.split("contacts");
+
+      CursorList<ThreadRecord> conversations = queryConversations(cleanQuery);
+      timer.split("conversations");
+
+      CursorList<MessageResult> messages = queryMessages(cleanQuery);
+      timer.split("messages");
+
+      timer.stop(TAG);
 
       callback.onResult(new SearchResult(cleanQuery, contacts, conversations, messages));
     });
   }
 
+  public void query(@NonNull String query, long threadId, @NonNull Callback<CursorList<MessageResult>> callback) {
+    if (TextUtils.isEmpty(query)) {
+      callback.onResult(CursorList.emptyList());
+      return;
+    }
+
+    executor.execute(() -> {
+      long startTime = System.currentTimeMillis();
+      CursorList<MessageResult> messages = queryMessages(sanitizeQuery(query), threadId);
+      Log.d(TAG, "[ConversationQuery] " + (System.currentTimeMillis() - startTime) + " ms");
+
+      callback.onResult(messages);
+    });
+  }
+
   private CursorList<Recipient> queryContacts(String query) {
     if (!Permissions.hasAny(context, Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS)) {
       return CursorList.emptyList();
@@ -116,6 +147,12 @@ class SearchRepository {
                             : CursorList.emptyList();
   }
 
+  private CursorList<MessageResult> queryMessages(@NonNull String query, long threadId) {
+    Cursor messages = searchDatabase.queryMessages(query, threadId);
+    return messages != null ? new CursorList<>(messages, new MessageModelBuilder(context))
+                            : CursorList.emptyList();
+  }
+
   /**
    * Unfortunately {@link DatabaseUtils#sqlEscapeString(String)} is not sufficient for our purposes.
    * MATCH queries have a separate format of their own that disallow most "special" characters.
@@ -177,17 +214,19 @@ class SearchRepository {
 
     @Override
     public MessageResult build(@NonNull Cursor cursor) {
-      Address   address    = Address.fromSerialized(cursor.getString(0));
-      Recipient recipient  = Recipient.from(context, address, false);
-      String    body       = cursor.getString(cursor.getColumnIndexOrThrow(SearchDatabase.SNIPPET));
-      long      receivedMs = cursor.getLong(cursor.getColumnIndexOrThrow(MmsSmsColumns.NORMALIZED_DATE_RECEIVED));
-      long      threadId   = cursor.getLong(cursor.getColumnIndexOrThrow(MmsSmsColumns.THREAD_ID));
-
-      return new MessageResult(recipient, body, threadId, receivedMs);
+      Address   conversationAddress   = Address.fromSerialized(cursor.getString(cursor.getColumnIndex(SearchDatabase.CONVERSATION_ADDRESS)));
+      Address   messageAddress        = Address.fromSerialized(cursor.getString(cursor.getColumnIndexOrThrow(SearchDatabase.MESSAGE_ADDRESS)));
+      Recipient conversationRecipient = Recipient.from(context, conversationAddress, false);
+      Recipient messageRecipient      = Recipient.from(context, messageAddress, false);
+      String    body                  = cursor.getString(cursor.getColumnIndexOrThrow(SearchDatabase.SNIPPET));
+      long      receivedMs            = cursor.getLong(cursor.getColumnIndexOrThrow(MmsSmsColumns.NORMALIZED_DATE_RECEIVED));
+      long      threadId              = cursor.getLong(cursor.getColumnIndexOrThrow(MmsSmsColumns.THREAD_ID));
+
+      return new MessageResult(conversationRecipient, messageRecipient, body, threadId, receivedMs);
     }
   }
 
-  public interface Callback {
-    void onResult(@NonNull SearchResult result);
+  public interface Callback<E> {
+    void onResult(@NonNull E result);
   }
 }
diff --git a/src/org/thoughtcrime/securesms/search/SearchViewModel.java b/src/org/thoughtcrime/securesms/search/SearchViewModel.java
index fd80a2371a..592e46ad6e 100644
--- a/src/org/thoughtcrime/securesms/search/SearchViewModel.java
+++ b/src/org/thoughtcrime/securesms/search/SearchViewModel.java
@@ -11,6 +11,7 @@ import android.text.TextUtils;
 
 import org.thoughtcrime.securesms.search.model.SearchResult;
 import org.thoughtcrime.securesms.util.Debouncer;
+import org.thoughtcrime.securesms.util.Util;
 
 /**
  * A {@link ViewModel} for handling all the business logic and interactions that take place inside
@@ -28,7 +29,7 @@ class SearchViewModel extends ViewModel {
 
   private String lastQuery;
 
-  SearchViewModel(@NonNull SearchRepository searchRepository) {
+  private SearchViewModel(@NonNull SearchRepository searchRepository) {
     this.searchResult     = new ObservingLiveData();
     this.searchRepository = searchRepository;
     this.debouncer        = new Debouncer(500);
@@ -49,7 +50,15 @@ class SearchViewModel extends ViewModel {
 
   void updateQuery(String query) {
     lastQuery = query;
-    debouncer.publish(() -> searchRepository.query(query, searchResult::postValue));
+    debouncer.publish(() -> searchRepository.query(query, result -> {
+      Util.runOnMain(() -> {
+        if (query.equals(lastQuery)) {
+          searchResult.setValue(result);
+        } else {
+          result.close();
+        }
+      });
+    }));
   }
 
   @NonNull
diff --git a/src/org/thoughtcrime/securesms/search/model/MessageResult.java b/src/org/thoughtcrime/securesms/search/model/MessageResult.java
index c47d73e11a..2e8aaf3d11 100644
--- a/src/org/thoughtcrime/securesms/search/model/MessageResult.java
+++ b/src/org/thoughtcrime/securesms/search/model/MessageResult.java
@@ -9,19 +9,22 @@ import org.thoughtcrime.securesms.recipients.Recipient;
  */
 public class MessageResult {
 
-  public final Recipient recipient;
+  public final Recipient conversationRecipient;
+  public final Recipient messageRecipient;
   public final String    bodySnippet;
   public final long      threadId;
   public final long      receivedTimestampMs;
 
-  public MessageResult(@NonNull Recipient recipient,
+  public MessageResult(@NonNull Recipient conversationRecipient,
+                       @NonNull Recipient messageRecipient,
                        @NonNull String bodySnippet,
                        long threadId,
                        long receivedTimestampMs)
   {
-    this.recipient           = recipient;
-    this.bodySnippet         = bodySnippet;
-    this.threadId            = threadId;
-    this.receivedTimestampMs = receivedTimestampMs;
+    this.conversationRecipient = conversationRecipient;
+    this.messageRecipient      = messageRecipient;
+    this.bodySnippet           = bodySnippet;
+    this.threadId              = threadId;
+    this.receivedTimestampMs   = receivedTimestampMs;
   }
 }
diff --git a/src/org/thoughtcrime/securesms/util/CloseableLiveData.java b/src/org/thoughtcrime/securesms/util/CloseableLiveData.java
new file mode 100644
index 0000000000..93286c39d9
--- /dev/null
+++ b/src/org/thoughtcrime/securesms/util/CloseableLiveData.java
@@ -0,0 +1,35 @@
+package org.thoughtcrime.securesms.util;
+
+import android.arch.lifecycle.MutableLiveData;
+
+import java.io.Closeable;
+
+/**
+ * Implementation of {@link android.arch.lifecycle.LiveData} that will handle closing the contained
+ * {@link Closeable} when the value changes.
+ */
+public class CloseableLiveData<E extends Closeable> extends MutableLiveData<E> {
+
+  @Override
+  public void setValue(E value) {
+    setValue(value, true);
+  }
+
+  public void setValue(E value, boolean closePrevious) {
+    E previous = getValue();
+
+    if (previous != null && closePrevious) {
+      Util.close(previous);
+    }
+
+    super.setValue(value);
+  }
+
+  public void close() {
+    E value = getValue();
+
+    if (value != null) {
+      Util.close(value);
+    }
+  }
+}
diff --git a/src/org/thoughtcrime/securesms/util/SearchUtil.java b/src/org/thoughtcrime/securesms/util/SearchUtil.java
new file mode 100644
index 0000000000..0fe4b59abe
--- /dev/null
+++ b/src/org/thoughtcrime/securesms/util/SearchUtil.java
@@ -0,0 +1,96 @@
+package org.thoughtcrime.securesms.util;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.Spanned;
+import android.text.TextUtils;
+import android.text.style.CharacterStyle;
+
+import com.annimon.stream.Stream;
+
+import org.whispersystems.libsignal.util.Pair;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Locale;
+
+public class SearchUtil {
+
+  public static Spannable getHighlightedSpan(@NonNull Locale locale,
+                                             @NonNull StyleFactory styleFactory,
+                                             @Nullable String text,
+                                             @Nullable String highlight)
+  {
+    if (TextUtils.isEmpty(text)) {
+      return new SpannableString("");
+    }
+
+    text = text.replaceAll("\n", " ");
+
+    return getHighlightedSpan(locale, styleFactory, new SpannableString(text), highlight);
+  }
+
+  public static Spannable getHighlightedSpan(@NonNull Locale locale,
+                                             @NonNull StyleFactory styleFactory,
+                                             @Nullable Spannable text,
+                                             @Nullable String highlight)
+  {
+    if (TextUtils.isEmpty(text)) {
+      return new SpannableString("");
+    }
+
+
+    if (TextUtils.isEmpty(highlight)) {
+      return text;
+    }
+
+    List<Pair<Integer, Integer>> ranges  = getHighlightRanges(locale, text.toString(), highlight);
+    SpannableString              spanned = new SpannableString(text);
+
+    for (Pair<Integer, Integer> range : ranges) {
+      spanned.setSpan(styleFactory.create(), range.first(), range.second(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
+    }
+
+    return spanned;
+  }
+
+  static List<Pair<Integer, Integer>> getHighlightRanges(@NonNull Locale locale,
+                                                         @NonNull String text,
+                                                         @NonNull String highlight)
+  {
+    String       normalizedText      = text.toLowerCase(locale);
+    String       normalizedHighlight = highlight.toLowerCase(locale);
+    List<String> highlightTokens     = Stream.of(normalizedHighlight.split("\\s")).filter(s -> s.trim().length() > 0).toList();
+    List<String> textTokens          = Stream.of(normalizedText.split("\\s")).filter(s -> s.trim().length() > 0).toList();
+
+    List<Pair<Integer, Integer>> ranges = new LinkedList<>();
+
+    int textListIndex = 0;
+    int textCharIndex = 0;
+
+    for (String highlightToken : highlightTokens) {
+      for (int i = textListIndex; i < textTokens.size(); i++) {
+        if (textTokens.get(i).startsWith(highlightToken)) {
+          textListIndex = i + 1;
+          ranges.add(new Pair<>(textCharIndex, textCharIndex + highlightToken.length()));
+          textCharIndex += textTokens.get(i).length() + 1;
+          break;
+        }
+        textCharIndex += textTokens.get(i).length() + 1;
+      }
+    }
+
+    if (ranges.size() != highlightTokens.size()) {
+      return Collections.emptyList();
+    }
+
+    return ranges;
+  }
+
+  public interface StyleFactory {
+    CharacterStyle create();
+  }
+}
diff --git a/test/unitTest/java/org/thoughtcrime/securesms/util/SearchUtilTest.java b/test/unitTest/java/org/thoughtcrime/securesms/util/SearchUtilTest.java
new file mode 100644
index 0000000000..e70ff88073
--- /dev/null
+++ b/test/unitTest/java/org/thoughtcrime/securesms/util/SearchUtilTest.java
@@ -0,0 +1,65 @@
+package org.thoughtcrime.securesms.util;
+
+import org.junit.Test;
+import org.whispersystems.libsignal.util.Pair;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class SearchUtilTest {
+
+  private static final Locale LOCALE = Locale.ENGLISH;
+
+  @Test
+  public void getHighlightRanges_singleHighlightToken() {
+    String                       text      = "abc";
+    String                       highlight = "a";
+    List<Pair<Integer, Integer>> result    = SearchUtil.getHighlightRanges(LOCALE, text, highlight);
+
+    assertEquals(Arrays.asList(new Pair<>(0, 1)), result);
+  }
+
+  @Test
+  public void getHighlightRanges_multipleHighlightTokens() {
+    String                       text      = "a bc";
+    String                       highlight = "a b";
+    List<Pair<Integer, Integer>> result    = SearchUtil.getHighlightRanges(LOCALE, text, highlight);
+
+    assertEquals(Arrays.asList(new Pair<>(0, 1), new Pair<>(2, 3)), result);
+
+
+    text      = "abc def";
+    highlight = "ab de";
+    result    = SearchUtil.getHighlightRanges(LOCALE, text, highlight);
+
+    assertEquals(Arrays.asList(new Pair<>(0, 2), new Pair<>(4, 6)), result);
+  }
+
+  @Test
+  public void getHighlightRanges_onlyHighlightPrefixes() {
+    String                       text      = "abc";
+    String                       highlight = "b";
+    List<Pair<Integer, Integer>> result    = SearchUtil.getHighlightRanges(LOCALE, text, highlight);
+
+    assertTrue(result.isEmpty());
+
+    text      = "abc";
+    highlight = "c";
+    result    = SearchUtil.getHighlightRanges(LOCALE, text, highlight);
+
+    assertTrue(result.isEmpty());
+  }
+
+  @Test
+  public void getHighlightRanges_resultNotInFirstToken() {
+    String                       text      = "abc def ghi";
+    String                       highlight = "gh";
+    List<Pair<Integer, Integer>> result    = SearchUtil.getHighlightRanges(LOCALE, text, highlight);
+
+    assertEquals(Arrays.asList(new Pair<>(8, 10)), result);
+  }
+}