Minimize EditText Spans 3/9: ReactBackgroundColorSpan (facebook#36547)

Summary:
Pull Request resolved: facebook#36547

This is part of a series of changes to minimize the number of spans committed to EditText, as a mitigation for platform issues on Samsung devices. See this [GitHub thread]( facebook#35936 (comment)) for greater context on the platform behavior.

This adds `ReactBackgroundColorSpan` to the list of spans eligible to be stripped.

Changelog:
[Android][Fixed] - Minimize Spans 3/N: ReactBackgroundColorSpan

Reviewed By: javache

Differential Revision: D44240782

fbshipit-source-id: 5ff28738f5dfdea52817e71b9173384fbf8b26dd

Author: NickGerleman

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

@@ -11,6 +11,7 @@
 import static com.facebook.react.views.text.TextAttributeProps.UNSET;
 
 import android.content.Context;
+import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
@@ -50,6 +51,7 @@
 import com.facebook.react.views.text.CustomLineHeightSpan;
 import com.facebook.react.views.text.CustomStyleSpan;
 import com.facebook.react.views.text.ReactAbsoluteSizeSpan;
+import com.facebook.react.views.text.ReactBackgroundColorSpan;
 import com.facebook.react.views.text.ReactSpan;
 import com.facebook.react.views.text.ReactTextUpdate;
 import com.facebook.react.views.text.ReactTypefaceUtils;
@@ -680,6 +682,16 @@ public boolean test(ReactAbsoluteSizeSpan span) {
             return span.getSize() == mTextAttributes.getEffectiveFontSize();
           }
         });
+
+    stripSpansOfKind(
+        sb,
+        ReactBackgroundColorSpan.class,
+        new SpanPredicate<ReactBackgroundColorSpan>() {
+          @Override
+          public boolean test(ReactBackgroundColorSpan span) {
+            return span.getBackgroundColor() == mReactBackgroundManager.getBackgroundColor();
+          }
+        });
   }
 
   private <T> void stripSpansOfKind(
@@ -717,11 +729,17 @@ private void restoreStyleEquivalentSpans(SpannableStringBuilder workingText) {
     // (least precedence). This ensures the span is behind any overlapping spans.
     spanFlags |= Spannable.SPAN_PRIORITY;
 
-    workingText.setSpan(
-        new ReactAbsoluteSizeSpan(mTextAttributes.getEffectiveFontSize()),
-        0,
-        workingText.length(),
-        spanFlags);
+    List<Object> spans = new ArrayList<>();
+    spans.add(new ReactAbsoluteSizeSpan(mTextAttributes.getEffectiveFontSize()));
+
+    int backgroundColor = mReactBackgroundManager.getBackgroundColor();
+    if (backgroundColor != Color.TRANSPARENT) {
+      spans.add(new ReactBackgroundColorSpan(backgroundColor));
+    }
+
+    for (Object span : spans) {
+      workingText.setSpan(span, 0, workingText.length(), spanFlags);
+    }
   }
 
   private static boolean sameTextForSpan(

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewBackgroundManager.java

@@ -19,6 +19,7 @@ public class ReactViewBackgroundManager {
 
   private @Nullable ReactViewBackgroundDrawable mReactBackgroundDrawable;
   private View mView;
+  private int mColor = Color.TRANSPARENT;
 
   public ReactViewBackgroundManager(View view) {
     this.mView = view;
@@ -56,6 +57,10 @@ public void setBackgroundColor(int color) {
     }
   }
 
+  public int getBackgroundColor() {
+    return mColor;
+  }
+
   public void setBorderWidth(int position, float width) {
     getOrCreateReactViewBackground().setBorderWidth(position, width);
   }