Back out "Fix issue#11068 of duplicating characters when replacing letters to lowercase or uppercase in TextInput"

Summary:
Changelog: [Internal] - Back out facebook#35929 due to facebook#35929 (comment)

Original Phabricator Diff: D47243817

Reviewed By: sunzhaoyuan

Differential Revision: D47785787

fbshipit-source-id: 81598be3f0b4e0e753dfbee4cee781673f900827

Author: lunaleaps

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactEditText.java

@@ -632,13 +632,10 @@ public void maybeSetText(ReactTextUpdate reactTextUpdate) {
     if (reactTextUpdate.getText().length() == 0) {
       setText(null);
     } else {
-      boolean shouldRestoreComposingSpans = length() == spannableStringBuilder.length();
-
+      // When we update text, we trigger onChangeText code that will
+      // try to update state if the wrapper is available. Temporarily disable
+      // to prevent an infinite loop.
       getText().replace(0, length(), spannableStringBuilder);
-
-      if (shouldRestoreComposingSpans) {
-        restoreComposingSpansToTextFrom(spannableStringBuilder);
-      }
     }
     mDisableTextDiffing = false;
 
@@ -653,13 +650,10 @@ public void maybeSetText(ReactTextUpdate reactTextUpdate) {
   }
 
   /**
-   * Remove and/or add {@link Spanned#SPAN_EXCLUSIVE_EXCLUSIVE} spans, since they should only exist
-   * as long as the text they cover is the same unless they are {@link Spanned#SPAN_COMPOSING}. All
-   * other spans will remain the same, since they will adapt to the new text, hence why {@link
-   * SpannableStringBuilder#replace} never removes them. Keep copy of {@link Spanned#SPAN_COMPOSING}
-   * Spans in {@param spannableStringBuilder}, because they are important for keyboard suggestions.
-   * Without keeping these Spans, suggestions default to be put after the current selection
-   * position, possibly resulting in letter duplication.
+   * Remove and/or add {@link Spanned.SPAN_EXCLUSIVE_EXCLUSIVE} spans, since they should only exist
+   * as long as the text they cover is the same. All other spans will remain the same, since they
+   * will adapt to the new text, hence why {@link SpannableStringBuilder#replace} never removes
+   * them.
    */
   private void manageSpans(SpannableStringBuilder spannableStringBuilder) {
     Object[] spans = getText().getSpans(0, length(), Object.class);
@@ -668,7 +662,6 @@ private void manageSpans(SpannableStringBuilder spannableStringBuilder) {
       int spanFlags = getText().getSpanFlags(span);
       boolean isExclusiveExclusive =
           (spanFlags & Spanned.SPAN_EXCLUSIVE_EXCLUSIVE) == Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
-      boolean isComposing = (spanFlags & Spanned.SPAN_COMPOSING) == Spanned.SPAN_COMPOSING;
 
       // Remove all styling spans we might have previously set
       if (span instanceof ReactSpan) {
@@ -683,12 +676,6 @@ private void manageSpans(SpannableStringBuilder spannableStringBuilder) {
       final int spanStart = getText().getSpanStart(span);
       final int spanEnd = getText().getSpanEnd(span);
 
-      // We keep a copy of Composing spans
-      if (isComposing) {
-        spannableStringBuilder.setSpan(span, spanStart, spanEnd, spanFlags);
-        continue;
-      }
-
       // Make sure the span is removed from existing text, otherwise the spans we set will be
       // ignored or it will cover text that has changed.
       getText().removeSpan(span);
@@ -816,34 +803,6 @@ private void addSpansFromStyleAttributes(SpannableStringBuilder workingText) {
     }
   }
 
-  /**
-   * Attaches the {@link Spanned#SPAN_COMPOSING} from {@param spannableStringBuilder} to {@link
-   * ReactEditText#getText}
-   *
-   * <p>See {@link ReactEditText#manageSpans} for more details. Also
-   * https://github.com/facebook/react-native/issues/11068
-   */
-  private void restoreComposingSpansToTextFrom(SpannableStringBuilder spannableStringBuilder) {
-    Editable text = getText();
-    if (text == null) {
-      return;
-    }
-    Object[] spans = spannableStringBuilder.getSpans(0, length(), Object.class);
-    for (Object span : spans) {
-      int spanFlags = spannableStringBuilder.getSpanFlags(span);
-      boolean isComposing = (spanFlags & Spanned.SPAN_COMPOSING) == Spanned.SPAN_COMPOSING;
-
-      if (!isComposing) {
-        continue;
-      }
-
-      final int spanStart = spannableStringBuilder.getSpanStart(span);
-      final int spanEnd = spannableStringBuilder.getSpanEnd(span);
-
-      text.setSpan(span, spanStart, spanEnd, spanFlags);
-    }
-  }
-
   private static boolean sameTextForSpan(
       final Editable oldText,
       final SpannableStringBuilder newText,