Updated emoji set

// FREEBIE

res/drawable/emoji_category_activity_dark.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+          android:enterFadeDuration="200"
+          android:exitFadeDuration="300">
+    <item android:state_selected="true">
+        <bitmap android:src="@drawable/ic_directions_bike_white_24dp"
+                android:tint="@color/grey_400"/>
+    </item>
+    <item>
+        <bitmap android:src="@drawable/ic_directions_bike_white_24dp"
+                android:tint="@color/grey_700"/>
+    </item>
+
+</selector>

res/drawable/emoji_category_activity_light.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+          android:enterFadeDuration="200"
+          android:exitFadeDuration="300">
+    <item android:state_selected="true">
+        <bitmap android:src="@drawable/ic_directions_bike_white_24dp"
+                android:tint="@color/grey_800"/>
+    </item>
+    <item>
+        <bitmap android:src="@drawable/ic_directions_bike_white_24dp"
+                android:tint="@color/grey_400"/>
+    </item>
+
+</selector>

res/drawable/emoji_category_flags_dark.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+          android:enterFadeDuration="200"
+          android:exitFadeDuration="300">
+    <item android:state_selected="true">
+        <bitmap android:src="@drawable/ic_flag_white_24dp"
+                android:tint="@color/grey_400"/>
+    </item>
+    <item>
+        <bitmap android:src="@drawable/ic_flag_white_24dp"
+                android:tint="@color/grey_700"/>
+    </item>
+
+</selector>

res/drawable/emoji_category_flags_light.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+          android:enterFadeDuration="200"
+          android:exitFadeDuration="300">
+    <item android:state_selected="true">
+        <bitmap android:src="@drawable/ic_flag_white_24dp"
+                android:tint="@color/grey_800"/>
+    </item>
+    <item>
+        <bitmap android:src="@drawable/ic_flag_white_24dp"
+                android:tint="@color/grey_400"/>
+    </item>
+
+</selector>

res/drawable/emoji_category_foods_dark.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+          android:enterFadeDuration="200"
+          android:exitFadeDuration="300">
+    <item android:state_selected="true">
+        <bitmap android:src="@drawable/ic_restaurant_white_24dp"
+                android:tint="@color/grey_400"/>
+    </item>
+    <item>
+        <bitmap android:src="@drawable/ic_restaurant_white_24dp"
+                android:tint="@color/grey_700"/>
+    </item>
+
+</selector>

res/drawable/emoji_category_foods_light.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+          android:enterFadeDuration="200"
+          android:exitFadeDuration="300">
+    <item android:state_selected="true">
+        <bitmap android:src="@drawable/ic_restaurant_white_24dp"
+                android:tint="@color/grey_800"/>
+    </item>
+    <item>
+        <bitmap android:src="@drawable/ic_restaurant_white_24dp"
+                android:tint="@color/grey_400"/>
+    </item>
+
+</selector>

res/drawable/emoji_category_objects_dark.xml

@@ -1,7 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android"
-          android:enterFadeDuration="200"
-          android:exitFadeDuration="300">
-	<item android:state_selected="true" android:drawable="@drawable/ic_emoji_objects_activated_dark" />
-	<item android:drawable="@drawable/ic_emoji_objects_normal_dark" />
+		  android:enterFadeDuration="200"
+		  android:exitFadeDuration="300">
+	<item android:state_selected="true">
+		<bitmap android:src="@drawable/ic_lightbulb_outline_white_24dp"
+				android:tint="@color/grey_400"/>
+	</item>
+	<item>
+		<bitmap android:src="@drawable/ic_lightbulb_outline_white_24dp"
+				android:tint="@color/grey_700"/>
+	</item>
+
 </selector>

res/drawable/emoji_category_objects_light.xml

@@ -1,7 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android"
-          android:enterFadeDuration="200"
-          android:exitFadeDuration="300">
-	<item android:state_selected="true" android:drawable="@drawable/ic_emoji_objects_activated_light" />
-	<item android:drawable="@drawable/ic_emoji_objects_normal_light" />
+		  android:enterFadeDuration="200"
+		  android:exitFadeDuration="300">
+	<item android:state_selected="true">
+		<bitmap android:src="@drawable/ic_lightbulb_outline_white_24dp"
+				android:tint="@color/grey_800"/>
+	</item>
+	<item>
+		<bitmap android:src="@drawable/ic_lightbulb_outline_white_24dp"
+				android:tint="@color/grey_400"/>
+	</item>
+
 </selector>

res/values/attrs.xml

@@ -52,10 +52,13 @@
 
     <attr name="emoji_category_recent" format="reference"/>
     <attr name="emoji_category_people" format="reference"/>
-    <attr name="emoji_category_objects" format="reference"/>
     <attr name="emoji_category_nature" format="reference"/>
+    <attr name="emoji_category_foods"  format="reference"/>
+    <attr name="emoji_category_activity" format="reference"/>
     <attr name="emoji_category_places" format="reference"/>
+    <attr name="emoji_category_objects" format="reference"/>
     <attr name="emoji_category_symbol" format="reference"/>
+    <attr name="emoji_category_flags" format="reference"/>
     <attr name="emoji_category_emoticons" format="reference"/>
     <attr name="quick_camera_icon" format="reference"/>
     <attr name="quick_mic_icon" format="reference"/>

res/values/themes.xml

@@ -137,10 +137,13 @@
 
         <item name="emoji_category_recent">@drawable/emoji_category_recent_light</item>
         <item name="emoji_category_people">@drawable/emoji_category_people_light</item>
-        <item name="emoji_category_objects">@drawable/emoji_category_objects_light</item>
         <item name="emoji_category_nature">@drawable/emoji_category_nature_light</item>
+        <item name="emoji_category_foods">@drawable/emoji_category_foods_light</item>
+        <item name="emoji_category_activity">@drawable/emoji_category_activity_light</item>
         <item name="emoji_category_places">@drawable/emoji_category_places_light</item>
+        <item name="emoji_category_objects">@drawable/emoji_category_objects_light</item>
         <item name="emoji_category_symbol">@drawable/emoji_category_symbol_light</item>
+        <item name="emoji_category_flags">@drawable/emoji_category_flags_light</item>
         <item name="emoji_category_emoticons">@drawable/emoji_category_emoticons_light</item>
 
 
@@ -280,10 +283,13 @@
 
         <item name="emoji_category_recent">@drawable/emoji_category_recent_dark</item>
         <item name="emoji_category_people">@drawable/emoji_category_people_dark</item>
-        <item name="emoji_category_objects">@drawable/emoji_category_objects_dark</item>
         <item name="emoji_category_nature">@drawable/emoji_category_nature_dark</item>
+        <item name="emoji_category_foods">@drawable/emoji_category_foods_dark</item>
+        <item name="emoji_category_activity">@drawable/emoji_category_activity_dark</item>
         <item name="emoji_category_places">@drawable/emoji_category_places_dark</item>
+        <item name="emoji_category_objects">@drawable/emoji_category_objects_dark</item>
         <item name="emoji_category_symbol">@drawable/emoji_category_symbol_dark</item>
+        <item name="emoji_category_flags">@drawable/emoji_category_flags_dark</item>
         <item name="emoji_category_emoticons">@drawable/emoji_category_emoticons_dark</item>
 
         <item name="quick_camera_icon">@drawable/quick_camera_dark</item>

src/org/thoughtcrime/securesms/components/emoji/EmojiDrawer.java

@@ -68,7 +68,8 @@ public class EmojiDrawer extends LinearLayout implements InputView {
 
     RepeatableImageKey backspace = (RepeatableImageKey)v.findViewById(R.id.backspace);
     backspace.setOnKeyEventListener(new KeyEventListener() {
-      @Override public void onKeyEvent() {
+      @Override
+      public void onKeyEvent() {
         if (listener != null) listener.onKeyEvent(DELETE_KEY_EVENT);
       }
     });
@@ -101,7 +102,8 @@ public class EmojiDrawer extends LinearLayout implements InputView {
     pager.setAdapter(new EmojiPagerAdapter(getContext(),
                                            models,
                                            new EmojiSelectionListener() {
-                                             @Override public void onEmojiSelected(String emoji) {
+                                             @Override
+                                             public void onEmojiSelected(String emoji) {
                                                Log.w("EmojiDrawer", "onEmojiSelected()");
                                                recentModel.onCodePointSelected(emoji);
                                                if (listener != null) listener.onEmojiSelected(emoji);
@@ -143,7 +145,8 @@ public class EmojiDrawer extends LinearLayout implements InputView {
       return pages.size();
     }
 
-    @Override public Object instantiateItem(ViewGroup container, int position) {
+    @Override
+    public Object instantiateItem(ViewGroup container, int position) {
       EmojiPageView page = new EmojiPageView(context);
       page.setModel(pages.get(position));
       page.setEmojiSelectedListener(listener);
@@ -151,22 +154,26 @@ public class EmojiDrawer extends LinearLayout implements InputView {
       return page;
     }
 
-    @Override public void destroyItem(ViewGroup container, int position, Object object) {
+    @Override
+    public void destroyItem(ViewGroup container, int position, Object object) {
       container.removeView((View)object);
     }
 
-    @Override public void setPrimaryItem(ViewGroup container, int position, Object object) {
+    @Override
+    public void setPrimaryItem(ViewGroup container, int position, Object object) {
       EmojiPageView current = (EmojiPageView) object;
       current.onSelected();
       super.setPrimaryItem(container, position, object);
     }
 
-    @Override public boolean isViewFromObject(View view, Object object) {
+    @Override
+    public boolean isViewFromObject(View view, Object object) {
       return view == object;
     }
 
-    @Override public View getCustomTabView(ViewGroup viewGroup, int i) {
-      ImageView image = new ImageView(context);
+    @Override
+    public View getCustomTabView(ViewGroup viewGroup, int i) {
+      ImageView  image = new ImageView(context);
       image.setScaleType(ScaleType.CENTER_INSIDE);
       image.setImageResource(ResUtil.getDrawableRes(context, pages.get(i).getIconAttr()));
       return image;

src/org/thoughtcrime/securesms/components/emoji/EmojiFilter.java

@@ -13,15 +13,18 @@ public class EmojiFilter implements InputFilter {
     this.view = view;
   }
 
-  @Override public CharSequence filter(CharSequence source, int start, int end,
-                                       Spanned dest, int dstart, int dend)
+  @Override
+  public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend)
   {
     char[] v = new char[end - start];
     TextUtils.getChars(source, start, end, v, 0);
+
     Spannable emojified = EmojiProvider.getInstance(view.getContext()).emojify(new String(v), view);
+
     if (source instanceof Spanned && emojified != null) {
       TextUtils.copySpansFrom((Spanned) source, start, end, null, emojified, 0);
     }
+
     return emojified;
   }
 }

src/org/thoughtcrime/securesms/components/emoji/EmojiProvider.java

@@ -9,7 +9,6 @@ import android.graphics.Paint;
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
-import android.os.AsyncTask;
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.support.annotation.NonNull;
@@ -17,42 +16,33 @@ import android.support.annotation.Nullable;
 import android.text.Spannable;
 import android.text.SpannableStringBuilder;
 import android.util.Log;
-import android.util.SparseArray;
 import android.widget.TextView;
 
 import org.thoughtcrime.securesms.R;
-import org.thoughtcrime.securesms.util.BitmapDecodingException;
-import org.thoughtcrime.securesms.util.BitmapUtil;
+import org.thoughtcrime.securesms.components.emoji.parsing.EmojiDrawInfo;
+import org.thoughtcrime.securesms.components.emoji.parsing.EmojiPageBitmap;
+import org.thoughtcrime.securesms.components.emoji.parsing.EmojiParser;
+import org.thoughtcrime.securesms.components.emoji.parsing.EmojiTree;
 import org.thoughtcrime.securesms.util.FutureTaskListener;
-import org.thoughtcrime.securesms.util.ListenableFutureTask;
 import org.thoughtcrime.securesms.util.Util;
 
-import java.io.IOException;
-import java.lang.ref.SoftReference;
-import java.util.concurrent.Callable;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
+import java.util.List;
+
+class EmojiProvider {
 
-public class EmojiProvider {
   private static final    String        TAG      = EmojiProvider.class.getSimpleName();
   private static volatile EmojiProvider instance = null;
   private static final    Paint         paint    = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG);
 
-  private final SparseArray<DrawInfo> offsets = new SparseArray<>();
+  private final EmojiTree emojiTree = new EmojiTree();
 
-  @SuppressWarnings("MalformedRegex")
-  //                                                            0x203c,0x2049 0x20a0-0x32ff          0x1f00-0x1fff              0xfe4e5-0xfe4ee
-  //                                                           |== !!, ?! ==||==== misc ====||======== emoticons ========||========= flags ==========|
-  private static final Pattern EMOJI_RANGE = Pattern.compile("[\\u203c\\u2049\\u20a0-\\u32ff\\ud83c\\udc00-\\ud83d\\udeff\\udbb9\\udce5-\\udbb9\\udcee]");
+  private static final int EMOJI_RAW_HEIGHT = 64;
+  private static final int EMOJI_RAW_WIDTH  = 64;
+  private static final int EMOJI_VERT_PAD   = 0;
+  private static final int EMOJI_PER_ROW    = 32;
 
-  public static final int    EMOJI_RAW_HEIGHT = 64;
-  public static final int    EMOJI_RAW_WIDTH  = 64;
-  public static final int    EMOJI_VERT_PAD   = 0;
-  public static final int    EMOJI_PER_ROW    = 32;
-
-  private final Context context;
-  private final float   decodeScale;
-  private final float   verticalPad;
+  private final float decodeScale;
+  private final float verticalPad;
 
   public static EmojiProvider getInstance(Context context) {
     if (instance == null) {
@@ -66,29 +56,31 @@ public class EmojiProvider {
   }
 
   private EmojiProvider(Context context) {
-    this.context     = context.getApplicationContext();
     this.decodeScale = Math.min(1f, context.getResources().getDimension(R.dimen.emoji_drawer_size) / EMOJI_RAW_HEIGHT);
     this.verticalPad = EMOJI_VERT_PAD * this.decodeScale;
+
     for (EmojiPageModel page : EmojiPages.PAGES) {
       if (page.hasSpriteMap()) {
-        final EmojiPageBitmap pageBitmap = new EmojiPageBitmap(page);
-        for (int i=0; i < page.getEmoji().length; i++) {
-          offsets.put(Character.codePointAt(page.getEmoji()[i], 0), new DrawInfo(pageBitmap, i));
+        EmojiPageBitmap pageBitmap = new EmojiPageBitmap(context, page, decodeScale);
+
+        for (int i=0;i<page.getEmoji().length;i++) {
+          emojiTree.add(page.getEmoji()[i], new EmojiDrawInfo(pageBitmap, i));
         }
       }
     }
   }
 
-  public @Nullable Spannable emojify(@Nullable CharSequence text, @NonNull TextView tv) {
+  @Nullable Spannable emojify(@Nullable CharSequence text, @NonNull TextView tv) {
     if (text == null) return null;
-    Matcher                matches = EMOJI_RANGE.matcher(text);
-    SpannableStringBuilder builder = new SpannableStringBuilder(text);
 
-    while (matches.find()) {
-      int codePoint = matches.group().codePointAt(0);
-      Drawable drawable = getEmojiDrawable(codePoint);
+    List<EmojiParser.Candidate> matches = new EmojiParser(emojiTree).findCandidates(text);
+    SpannableStringBuilder      builder = new SpannableStringBuilder(text);
+
+    for (EmojiParser.Candidate candidate : matches) {
+      Drawable drawable = getEmojiDrawable(candidate.getDrawInfo());
+
       if (drawable != null) {
-        builder.setSpan(new EmojiSpan(drawable, tv), matches.start(), matches.end(),
+        builder.setSpan(new EmojiSpan(drawable, tv), candidate.getStartIndex(), candidate.getEndIndex(),
                         Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
       }
     }
@@ -96,17 +88,18 @@ public class EmojiProvider {
     return builder;
   }
 
-  public Drawable getEmojiDrawable(int emojiCode) {
-    return getEmojiDrawable(offsets.get(emojiCode));
+  @Nullable Drawable getEmojiDrawable(CharSequence emoji) {
+    EmojiDrawInfo drawInfo = emojiTree.getEmoji(emoji, 0, emoji.length());
+    return getEmojiDrawable(drawInfo);
   }
 
-  private Drawable getEmojiDrawable(DrawInfo drawInfo) {
+  private @Nullable Drawable getEmojiDrawable(@Nullable EmojiDrawInfo drawInfo) {
     if (drawInfo == null)  {
       return null;
     }
 
     final EmojiDrawable drawable = new EmojiDrawable(drawInfo, decodeScale);
-    drawInfo.page.get().addListener(new FutureTaskListener<Bitmap>() {
+    drawInfo.getPage().get().addListener(new FutureTaskListener<Bitmap>() {
       @Override public void onSuccess(final Bitmap result) {
         Util.runOnMain(new Runnable() {
           @Override public void run() {
@@ -122,34 +115,36 @@ public class EmojiProvider {
     return drawable;
   }
 
-  public class EmojiDrawable extends Drawable {
-    private final DrawInfo info;
-    private       Bitmap   bmp;
-    private       float    intrinsicWidth;
-    private       float    intrinsicHeight;
+  class EmojiDrawable extends Drawable {
+    private final EmojiDrawInfo info;
+    private       Bitmap        bmp;
+    private       float         intrinsicWidth;
+    private       float         intrinsicHeight;
 
-    @Override public int getIntrinsicWidth() {
+    @Override
+    public int getIntrinsicWidth() {
       return (int)intrinsicWidth;
     }
 
-    @Override public int getIntrinsicHeight() {
+    @Override
+    public int getIntrinsicHeight() {
       return (int)intrinsicHeight;
     }
 
-    public EmojiDrawable(DrawInfo info, float decodeScale) {
+    EmojiDrawable(EmojiDrawInfo info, float decodeScale) {
       this.info            = info;
       this.intrinsicWidth  = EMOJI_RAW_WIDTH  * decodeScale;
       this.intrinsicHeight = EMOJI_RAW_HEIGHT * decodeScale;
     }
 
     @Override
-    public void draw(Canvas canvas) {
+    public void draw(@NonNull Canvas canvas) {
       if (bmp == null) {
         return;
       }
 
-      final int row = info.index / EMOJI_PER_ROW;
-      final int row_index = info.index % EMOJI_PER_ROW;
+      final int row = info.getIndex() / EMOJI_PER_ROW;
+      final int row_index = info.getIndex() % EMOJI_PER_ROW;
 
       canvas.drawBitmap(bmp,
                         new Rect((int)(row_index * intrinsicWidth),
@@ -181,85 +176,4 @@ public class EmojiProvider {
     public void setColorFilter(ColorFilter cf) { }
   }
 
-  private static class DrawInfo {
-    EmojiPageBitmap page;
-    int             index;
-
-    public DrawInfo(final EmojiPageBitmap page, final int index) {
-      this.page = page;
-      this.index = index;
-    }
-
-    @Override
-    public String toString() {
-      return "DrawInfo{" +
-          "page=" + page +
-          ", index=" + index +
-          '}';
-    }
-  }
-
-  private class EmojiPageBitmap {
-    private EmojiPageModel               model;
-    private SoftReference<Bitmap>        bitmapReference;
-    private ListenableFutureTask<Bitmap> task;
-
-    public EmojiPageBitmap(EmojiPageModel model) {
-      this.model = model;
-    }
-
-    private ListenableFutureTask<Bitmap> get() {
-      Util.assertMainThread();
-
-      if (bitmapReference != null && bitmapReference.get() != null) {
-        return new ListenableFutureTask<>(bitmapReference.get());
-      } else if (task != null) {
-        return task;
-      } else {
-        Callable<Bitmap> callable = new Callable<Bitmap>() {
-          @Override public Bitmap call() throws Exception {
-            try {
-              Log.w(TAG, "loading page " + model.getSprite());
-              return loadPage();
-            } catch (IOException ioe) {
-              Log.w(TAG, ioe);
-            }
-            return null;
-          }
-        };
-        task = new ListenableFutureTask<>(callable);
-        new AsyncTask<Void, Void, Void>() {
-          @Override protected Void doInBackground(Void... params) {
-            task.run();
-            return null;
-          }
-
-          @Override protected void onPostExecute(Void aVoid) {
-            task = null;
-          }
-        }.execute();
-      }
-      return task;
-    }
-
-    private Bitmap loadPage() throws IOException {
-      if (bitmapReference != null && bitmapReference.get() != null) return bitmapReference.get();
-
-      try {
-        final Bitmap bitmap = BitmapUtil.createScaledBitmap(context,
-                                                            "file:///android_asset/" + model.getSprite(),
-                                                            decodeScale);
-        bitmapReference = new SoftReference<>(bitmap);
-        Log.w(TAG, "onPageLoaded(" + model.getSprite() + ")");
-        return bitmap;
-      } catch (BitmapDecodingException e) {
-        Log.w(TAG, e);
-        throw new IOException(e);
-      }
-    }
-
-    @Override public String toString() {
-      return model.getSprite();
-    }
-  }
 }

src/org/thoughtcrime/securesms/components/emoji/EmojiView.java

@@ -32,7 +32,7 @@ public class EmojiView extends View implements Drawable.Callback {
   public void setEmoji(String emoji) {
     this.emoji    = emoji;
     this.drawable = EmojiProvider.getInstance(getContext())
-                                 .getEmojiDrawable(Character.codePointAt(emoji, 0));
+                                 .getEmojiDrawable(emoji);
     postInvalidate();
   }
 

src/org/thoughtcrime/securesms/components/emoji/parsing/EmojiDrawInfo.java

@@ -0,0 +1,31 @@
+package org.thoughtcrime.securesms.components.emoji.parsing;
+
+
+import android.support.annotation.NonNull;
+
+public class EmojiDrawInfo {
+
+  private final EmojiPageBitmap page;
+  private final int             index;
+
+  public EmojiDrawInfo(final @NonNull EmojiPageBitmap page, final int index) {
+    this.page  = page;
+    this.index = index;
+  }
+
+  public @NonNull EmojiPageBitmap getPage() {
+    return page;
+  }
+
+  public int getIndex() {
+    return index;
+  }
+
+  @Override
+  public String toString() {
+    return "DrawInfo{" +
+        "page=" + page +
+        ", index=" + index +
+        '}';
+  }
+}

src/org/thoughtcrime/securesms/components/emoji/parsing/EmojiPageBitmap.java

@@ -0,0 +1,90 @@
+package org.thoughtcrime.securesms.components.emoji.parsing;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.os.AsyncTask;
+import android.support.annotation.NonNull;
+import android.util.Log;
+
+import org.thoughtcrime.securesms.components.emoji.EmojiPageModel;
+import org.thoughtcrime.securesms.util.BitmapDecodingException;
+import org.thoughtcrime.securesms.util.BitmapUtil;
+import org.thoughtcrime.securesms.util.ListenableFutureTask;
+import org.thoughtcrime.securesms.util.Util;
+
+import java.io.IOException;
+import java.lang.ref.SoftReference;
+import java.util.concurrent.Callable;
+
+public class EmojiPageBitmap {
+
+  private static final String TAG = EmojiPageBitmap.class.getName();
+
+  private final Context        context;
+  private final EmojiPageModel model;
+  private final float          decodeScale;
+
+  private SoftReference<Bitmap>        bitmapReference;
+  private ListenableFutureTask<Bitmap> task;
+
+  public EmojiPageBitmap(@NonNull Context context, @NonNull EmojiPageModel model, float decodeScale) {
+    this.context     = context.getApplicationContext();
+    this.model       = model;
+    this.decodeScale = decodeScale;
+  }
+
+  public ListenableFutureTask<Bitmap> get() {
+    Util.assertMainThread();
+
+    if (bitmapReference != null && bitmapReference.get() != null) {
+      return new ListenableFutureTask<>(bitmapReference.get());
+    } else if (task != null) {
+      return task;
+    } else {
+      Callable<Bitmap> callable = new Callable<Bitmap>() {
+        @Override public Bitmap call() throws Exception {
+          try {
+            Log.w(TAG, "loading page " + model.getSprite());
+            return loadPage();
+          } catch (IOException ioe) {
+            Log.w(TAG, ioe);
+          }
+          return null;
+        }
+      };
+      task = new ListenableFutureTask<>(callable);
+      new AsyncTask<Void, Void, Void>() {
+        @Override protected Void doInBackground(Void... params) {
+          task.run();
+          return null;
+        }
+
+        @Override protected void onPostExecute(Void aVoid) {
+          task = null;
+        }
+      }.execute();
+    }
+    return task;
+  }
+
+  private Bitmap loadPage() throws IOException {
+    if (bitmapReference != null && bitmapReference.get() != null) return bitmapReference.get();
+
+    try {
+      final Bitmap bitmap = BitmapUtil.createScaledBitmap(context,
+                                                          "file:///android_asset/" + model.getSprite(),
+                                                          decodeScale);
+      bitmapReference = new SoftReference<>(bitmap);
+      Log.w(TAG, "onPageLoaded(" + model.getSprite() + ")");
+      return bitmap;
+    } catch (BitmapDecodingException e) {
+      Log.w(TAG, e);
+      throw new IOException(e);
+    }
+  }
+
+  @Override
+  public String toString() {
+    return model.getSprite();
+  }
+}

src/org/thoughtcrime/securesms/components/emoji/parsing/EmojiParser.java

@@ -0,0 +1,108 @@
+/**
+ * Copyright (c) 2014-present Vincent DURMONT vdurmont@gmail.com
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package org.thoughtcrime.securesms.components.emoji.parsing;
+
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Based in part on code from emoji-java
+ */
+public class EmojiParser {
+
+  private final EmojiTree emojiTree;
+
+  public EmojiParser(EmojiTree emojiTree) {
+    this.emojiTree = emojiTree;
+  }
+
+  public @NonNull List<Candidate> findCandidates(@Nullable CharSequence text) {
+    List<Candidate> results = new LinkedList<>();
+
+    if (text == null) return results;
+
+    for (int i = 0; i < text.length(); i++) {
+      int emojiEnd = getEmojiEndPos(text, i);
+
+      if (emojiEnd != -1) {
+        EmojiDrawInfo drawInfo = emojiTree.getEmoji(text, i, emojiEnd);
+
+        if (emojiEnd + 2 <= text.length()) {
+          if (Fitzpatrick.fitzpatrickFromUnicode(text, emojiEnd) != null) {
+            emojiEnd += 2;
+          }
+        }
+
+        results.add(new Candidate(i, emojiEnd, drawInfo));
+
+        i = emojiEnd - 1;
+      }
+    }
+
+    return results;
+  }
+
+  private int getEmojiEndPos(CharSequence text, int startPos) {
+    int best = -1;
+
+    for (int j = startPos + 1; j <= text.length(); j++) {
+      EmojiTree.Matches status = emojiTree.isEmoji(text, startPos, j);
+
+      if (status.exactMatch()) {
+        best = j;
+      } else if (status.impossibleMatch()) {
+        return best;
+      }
+    }
+
+    return best;
+  }
+
+  public class Candidate {
+
+    private final int           startIndex;
+    private final int           endIndex;
+    private final EmojiDrawInfo drawInfo;
+
+    Candidate(int startIndex, int endIndex, EmojiDrawInfo drawInfo) {
+      this.startIndex = startIndex;
+      this.endIndex = endIndex;
+      this.drawInfo = drawInfo;
+    }
+
+    public EmojiDrawInfo getDrawInfo() {
+      return drawInfo;
+    }
+
+    public int getEndIndex() {
+      return endIndex;
+    }
+
+    public int getStartIndex() {
+      return startIndex;
+    }
+  }
+
+}

src/org/thoughtcrime/securesms/components/emoji/parsing/EmojiTree.java

@@ -0,0 +1,128 @@
+/**
+ * Copyright (c) 2014-present Vincent DURMONT vdurmont@gmail.com
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package org.thoughtcrime.securesms.components.emoji.parsing;
+
+import android.support.annotation.Nullable;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Based in part on code from emoji-java
+ */
+public class EmojiTree {
+
+  private final EmojiTreeNode root = new EmojiTreeNode();
+
+  public void add(String emojiEncoding, EmojiDrawInfo emoji) {
+    EmojiTreeNode tree = root;
+
+    for (char c: emojiEncoding.toCharArray()) {
+      if (!tree.hasChild(c)) {
+        tree.addChild(c);
+      }
+
+      tree = tree.getChild(c);
+    }
+
+    tree.setEmoji(emoji);
+  }
+
+  public Matches isEmoji(CharSequence sequence, int startPosition, int endPosition) {
+    if (sequence == null) {
+      return Matches.POSSIBLY;
+    }
+
+    EmojiTreeNode tree = root;
+
+    for (int i=startPosition; i<endPosition; i++) {
+      char character = sequence.charAt(i);
+
+      if (!tree.hasChild(character)) {
+        return Matches.IMPOSSIBLE;
+      }
+
+      tree = tree.getChild(character);
+    }
+
+    return tree.isEndOfEmoji() ? Matches.EXACTLY : Matches.POSSIBLY;
+  }
+
+  public @Nullable EmojiDrawInfo getEmoji(CharSequence unicode, int startPosition, int endPostiion) {
+    EmojiTreeNode tree = root;
+
+    for (int i=startPosition; i<endPostiion; i++) {
+      char character = unicode.charAt(i);
+
+      if (!tree.hasChild(character)) {
+        return null;
+      }
+
+      tree = tree.getChild(character);
+    }
+
+    return tree.getEmoji();
+  }
+
+
+  private static class EmojiTreeNode {
+
+    private Map<Character, EmojiTreeNode> children = new HashMap<>();
+    private EmojiDrawInfo emoji;
+
+    public void setEmoji(EmojiDrawInfo emoji) {
+      this.emoji = emoji;
+    }
+
+    public @Nullable EmojiDrawInfo getEmoji() {
+      return emoji;
+    }
+
+    boolean hasChild(char child) {
+      return children.containsKey(child);
+    }
+
+    void addChild(char child) {
+      children.put(child, new EmojiTreeNode());
+    }
+
+    EmojiTreeNode getChild(char child) {
+      return children.get(child);
+    }
+
+    boolean isEndOfEmoji() {
+      return emoji != null;
+    }
+  }
+
+  public enum Matches {
+    EXACTLY, POSSIBLY, IMPOSSIBLE;
+
+    public boolean exactMatch() {
+      return this == EXACTLY;
+    }
+
+    public boolean impossibleMatch() {
+      return this == IMPOSSIBLE;
+    }
+  }
+
+}

src/org/thoughtcrime/securesms/components/emoji/parsing/Fitzpatrick.java

@@ -0,0 +1,64 @@
+package org.thoughtcrime.securesms.components.emoji.parsing;
+
+
+public enum Fitzpatrick {
+  /**
+   * Fitzpatrick modifier of type 1/2 (pale white/white)
+   */
+  TYPE_1_2("\uD83C\uDFFB"),
+
+  /**
+   * Fitzpatrick modifier of type 3 (cream white)
+   */
+  TYPE_3("\uD83C\uDFFC"),
+
+  /**
+   * Fitzpatrick modifier of type 4 (moderate brown)
+   */
+  TYPE_4("\uD83C\uDFFD"),
+
+  /**
+   * Fitzpatrick modifier of type 5 (dark brown)
+   */
+  TYPE_5("\uD83C\uDFFE"),
+
+  /**
+   * Fitzpatrick modifier of type 6 (black)
+   */
+  TYPE_6("\uD83C\uDFFF");
+
+  /**
+   * The unicode representation of the Fitzpatrick modifier
+   */
+  public final String unicode;
+
+  Fitzpatrick(String unicode) {
+    this.unicode = unicode;
+  }
+
+
+  public static Fitzpatrick fitzpatrickFromUnicode(CharSequence unicode, int index) {
+    for (Fitzpatrick v : values()) {
+      boolean match = true;
+
+      for (int i=0;i<v.unicode.toCharArray().length;i++) {
+        if (v.unicode.toCharArray()[i] != unicode.charAt(index + i)) {
+          match = false;
+        }
+      }
+
+      if (match) return v;
+    }
+
+    return null;
+  }
+
+  public static Fitzpatrick fitzpatrickFromType(String type) {
+    try {
+      return Fitzpatrick.valueOf(type.toUpperCase());
+    } catch (IllegalArgumentException e) {
+      return null;
+    }
+  }
+}
+