fix emoji not being replaced with Editable actions

Fixes #3267
Closes #3292
// FREEBIE

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

@@ -1,39 +1,42 @@
 package org.thoughtcrime.securesms.components.emoji;
 
 import android.content.Context;
-import android.graphics.drawable.Drawable.Callback;
+import android.graphics.drawable.Drawable;
+import android.support.annotation.NonNull;
 import android.support.v7.widget.AppCompatEditText;
+import android.text.InputFilter;
 import android.util.AttributeSet;
 
+import org.thoughtcrime.securesms.R;
+import org.thoughtcrime.securesms.components.emoji.EmojiProvider.EmojiDrawable;
+
 
 public class EmojiEditText extends AppCompatEditText {
-  private final Callback callback = new PostInvalidateCallback(this);
+  private static final String TAG = EmojiEditText.class.getSimpleName();
 
   public EmojiEditText(Context context) {
-    super(context);
+    this(context, null);
   }
 
   public EmojiEditText(Context context, AttributeSet attrs) {
-    super(context, attrs);
+    this(context, attrs, R.attr.editTextStyle);
   }
 
   public EmojiEditText(Context context, AttributeSet attrs, int defStyleAttr) {
     super(context, attrs, defStyleAttr);
-  }
-
-  @Override public void setText(CharSequence text, BufferType type) {
-    super.setText(EmojiProvider.getInstance(getContext()).emojify(text, EmojiProvider.EMOJI_SMALL, callback),
-                  BufferType.SPANNABLE);
+    setFilters(new InputFilter[]{ new EmojiFilter(this) });
   }
 
   public void insertEmoji(String emoji) {
     final int          start = getSelectionStart();
     final int          end   = getSelectionEnd();
-    final CharSequence text  = EmojiProvider.getInstance(getContext()).emojify(emoji,
-                                                                               EmojiProvider.EMOJI_SMALL,
-                                                                               callback);
 
-    getText().replace(Math.min(start, end), Math.max(start, end), text);
+    getText().replace(Math.min(start, end), Math.max(start, end), emoji);
     setSelection(end + emoji.length());
   }
+
+  @Override public void invalidateDrawable(@NonNull Drawable drawable) {
+    if (drawable instanceof EmojiDrawable) invalidate();
+    else                                   super.invalidateDrawable(drawable);
+  }
 }

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

@@ -0,0 +1,32 @@
+package org.thoughtcrime.securesms.components.emoji;
+
+import android.content.Context;
+import android.text.InputFilter;
+import android.text.Spannable;
+import android.text.Spanned;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.TextView;
+
+/**
+ * Created by kaonashi on 6/1/15.
+ */
+public class EmojiFilter implements InputFilter {
+  private View view;
+
+  public EmojiFilter(TextView view) {
+    this.view = view;
+  }
+
+  @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) {
+      TextUtils.copySpansFrom((Spanned) source, start, end, null, emojified, 0);
+    }
+    return emojified;
+  }
+}

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

@@ -45,7 +45,7 @@ public class EmojiProvider {
   private static final Pattern EMOJI_RANGE = Pattern.compile("[\\u20a0-\\u32ff\\ud83c\\udc00-\\ud83d\\udeff\\udbb9\\udce5-\\udbb9\\udcee]");
 
   public static final double EMOJI_FULL       = 1.00;
-  public static final double EMOJI_SMALL      = 0.50;
+  public static final double EMOJI_SMALL      = 0.60;
   public static final int    EMOJI_RAW_HEIGHT = 96;
   public static final int    EMOJI_RAW_WIDTH  = 102;
   public static final int    EMOJI_VERT_PAD   = 6;
@@ -84,13 +84,13 @@ public class EmojiProvider {
     }
   }
 
-  public CharSequence emojify(CharSequence text, double size, Callback callback) {
+  public Spannable emojify(CharSequence text, Callback callback) {
     Matcher                matches = EMOJI_RANGE.matcher(text);
     SpannableStringBuilder builder = new SpannableStringBuilder(text);
 
     while (matches.find()) {
       int codePoint = matches.group().codePointAt(0);
-      Drawable drawable = getEmojiDrawable(codePoint, size);
+      Drawable drawable = getEmojiDrawable(codePoint, EMOJI_SMALL);
       if (drawable != null) {
         builder.setSpan(new InvalidatingDrawableSpan(drawable, callback), matches.start(), matches.end(),
                         Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

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

@@ -1,29 +1,31 @@
 package org.thoughtcrime.securesms.components.emoji;
 
 import android.content.Context;
-import android.graphics.drawable.Drawable.Callback;
+import android.graphics.drawable.Drawable;
+import android.support.annotation.NonNull;
 import android.support.v7.widget.AppCompatTextView;
+import android.text.InputFilter;
 import android.util.AttributeSet;
 
+import org.thoughtcrime.securesms.components.emoji.EmojiProvider.EmojiDrawable;
+
 public class EmojiTextView extends AppCompatTextView {
-  private final Callback callback = new PostInvalidateCallback(this);
 
   public EmojiTextView(Context context) {
-    super(context);
+    this(context, null);
   }
 
   public EmojiTextView(Context context, AttributeSet attrs) {
-    super(context, attrs);
+    this(context, attrs, 0);
   }
 
   public EmojiTextView(Context context, AttributeSet attrs, int defStyleAttr) {
     super(context, attrs, defStyleAttr);
+    setFilters(new InputFilter[]{ new EmojiFilter(this) });
   }
 
-  @Override public void setText(CharSequence text, BufferType type) {
-    super.setText(EmojiProvider.getInstance(getContext()).emojify(text,
-                                                                  EmojiProvider.EMOJI_SMALL,
-                                                                  callback),
-                  BufferType.SPANNABLE);
+  @Override public void invalidateDrawable(@NonNull Drawable drawable) {
+    if (drawable instanceof EmojiDrawable) invalidate();
+    else                                   super.invalidateDrawable(drawable);
   }
 }

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

@@ -1,31 +0,0 @@
-package org.thoughtcrime.securesms.components.emoji;
-
-import android.graphics.drawable.Drawable;
-import android.graphics.drawable.Drawable.Callback;
-import android.view.View;
-
-import org.thoughtcrime.securesms.util.Util;
-
-public class PostInvalidateCallback implements Callback {
-  private final View view;
-
-  public PostInvalidateCallback(View view) {
-    this.view = view;
-  }
-
-  @Override public void invalidateDrawable(Drawable who) {
-    Util.runOnMain(new Runnable() {
-      @Override public void run() {
-        view.invalidate();
-      }
-    });
-  }
-
-  @Override public void scheduleDrawable(Drawable who, Runnable what, long when) {
-
-  }
-
-  @Override public void unscheduleDrawable(Drawable who, Runnable what) {
-
-  }
-}