Fix jumbomoji rendering and EmojiTextView resizing.

Fixed an issue where jumbomoji were not properly being rendered
when using system emoji. Also fixed an issue where the text
content wasn't properly being recalculated when the view is
resized.

Fixes #7875

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

@@ -23,9 +23,11 @@ public class EmojiTextView extends AppCompatTextView {
 
   private final boolean scaleEmojis;
 
-  private CharSequence originalText;
+  private CharSequence previousText;
+  private BufferType   previousBufferType;
   private float        originalFontSize;
   private boolean      useSystemEmoji;
+  private boolean      sizeChangeInProgress;
 
   public EmojiTextView(Context context) {
     this(context, null);
@@ -48,13 +50,6 @@ public class EmojiTextView extends AppCompatTextView {
   }
 
   @Override public void setText(@Nullable CharSequence text, BufferType type) {
-    if (Util.equals(originalText, text) && useSystemEmoji == useSystemEmoji()) {
-      return;
-    }
-
-    originalText   = text;
-    useSystemEmoji = useSystemEmoji();
-
     EmojiProvider             provider   = EmojiProvider.getInstance(getContext());
     EmojiParser.CandidateList candidates = provider.getCandidates(text);
 
@@ -72,6 +67,14 @@ public class EmojiTextView extends AppCompatTextView {
       super.setTextSize(TypedValue.COMPLEX_UNIT_PX, originalFontSize);
     }
 
+    if (unchanged(text, type)) {
+      return;
+    }
+
+    previousText       = text;
+    previousBufferType = type;
+    useSystemEmoji     = useSystemEmoji();
+
     if (useSystemEmoji || candidates == null || candidates.size() == 0) {
       super.setText(text, BufferType.NORMAL);
       return;
@@ -117,11 +120,30 @@ public class EmojiTextView extends AppCompatTextView {
     });
   }
 
+  private boolean unchanged(CharSequence text, BufferType bufferType) {
+    return Util.equals(previousText, text)             &&
+           Util.equals(previousBufferType, bufferType) &&
+           useSystemEmoji == useSystemEmoji()          &&
+           !sizeChangeInProgress;
+  }
+
   private boolean useSystemEmoji() {
    return TextSecurePreferences.isSystemEmojiPreferred(getContext());
   }
 
-  @Override public void invalidateDrawable(@NonNull Drawable drawable) {
+  @Override
+  protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+    super.onSizeChanged(w, h, oldw, oldh);
+
+    if (!sizeChangeInProgress) {
+      sizeChangeInProgress = true;
+      setText(previousText, previousBufferType);
+      sizeChangeInProgress = false;
+    }
+  }
+
+  @Override
+  public void invalidateDrawable(@NonNull Drawable drawable) {
     if (drawable instanceof EmojiDrawable) invalidate();
     else                                   super.invalidateDrawable(drawable);
   }