Fix TextInput Spannable flags

Summary:
The TextInput spannables are being set wrong by Nodes. Consequently,
when you hit space after a word, anything you type is highlighted, though it
shouldn't be.

Differential Revision: D3507516

ReactAndroid/src/main/java/com/facebook/react/flat/FlatTextShadowNode.java

@@ -59,17 +59,25 @@ import com.facebook.react.uimanager.ReactShadowNode;
     return false;
   }
 
+  /* package */ boolean isEditable() {
+    return false;
+  }
+
   /**
    * Recursively visits FlatTextShadowNode and its children,
    * applying spans to SpannableStringBuilder.
    */
-  /* package */ final void applySpans(SpannableStringBuilder builder) {
+  /* package */ final void applySpans(SpannableStringBuilder builder, boolean isEditable) {
     if (mTextBegin != mTextEnd || shouldAllowEmptySpans()) {
-      performApplySpans(builder, mTextBegin, mTextEnd);
+      performApplySpans(builder, mTextBegin, mTextEnd, isEditable);
     }
   }
 
   protected abstract void performCollectText(SpannableStringBuilder builder);
-  protected abstract void performApplySpans(SpannableStringBuilder builder, int begin, int end);
+  protected abstract void performApplySpans(
+      SpannableStringBuilder builder,
+      int begin,
+      int end,
+      boolean isEditable);
   protected abstract void performCollectAttachDetachListeners(StateBuilder stateBuilder);
 }

ReactAndroid/src/main/java/com/facebook/react/flat/RCTRawText.java

@@ -31,7 +31,11 @@ import com.facebook.react.uimanager.annotations.ReactProp;
   }
 
   @Override
-  protected void performApplySpans(SpannableStringBuilder builder, int begin, int end) {
+  protected void performApplySpans(
+      SpannableStringBuilder builder,
+      int begin,
+      int end,
+      boolean isEditable) {
     builder.setSpan(
         this,
         begin,

ReactAndroid/src/main/java/com/facebook/react/flat/RCTTextInlineImage.java

@@ -50,7 +50,11 @@ import com.facebook.react.uimanager.annotations.ReactProp;
   }
 
   @Override
-  protected void performApplySpans(SpannableStringBuilder builder, int begin, int end) {
+  protected void performApplySpans(
+      SpannableStringBuilder builder,
+      int begin,
+      int end,
+      boolean isEditable) {
     mInlineImageSpan.freeze();
     builder.setSpan(
         mInlineImageSpan,

ReactAndroid/src/main/java/com/facebook/react/flat/RCTTextInput.java

@@ -169,6 +169,11 @@ public class RCTTextInput extends RCTVirtualText implements AndroidView, CSSNode
     return true;
   }
 
+  @Override
+  boolean isEditable() {
+    return true;
+  }
+
   @Override
   protected void performCollectText(SpannableStringBuilder builder) {
     if (mText != null) {

ReactAndroid/src/main/java/com/facebook/react/flat/RCTVirtualText.java

@@ -54,14 +54,19 @@ import com.facebook.react.uimanager.annotations.ReactProp;
   }
 
   @Override
-  protected void performApplySpans(SpannableStringBuilder builder, int begin, int end) {
+  protected void performApplySpans(SpannableStringBuilder builder, int begin, int end, boolean isEditable) {
     mFontStylingSpan.freeze();
 
     // All spans will automatically extend to the right of the text, but not the left - except
     // for spans that start at the beginning of the text.
-    final int flag = begin == 0 ?
+    final int flag;
+    if (isEditable) {
+      flag = Spannable.SPAN_EXCLUSIVE_EXCLUSIVE;
+    } else {
+      flag = begin == 0 ?
           Spannable.SPAN_INCLUSIVE_INCLUSIVE :
           Spannable.SPAN_EXCLUSIVE_INCLUSIVE;
+    }
 
     builder.setSpan(
         mFontStylingSpan,
@@ -81,7 +86,7 @@ import com.facebook.react.uimanager.annotations.ReactProp;
 
     for (int i = 0, childCount = getChildCount(); i < childCount; ++i) {
       FlatTextShadowNode child = (FlatTextShadowNode) getChildAt(i);
-      child.applySpans(builder);
+      child.applySpans(builder, isEditable);
     }
   }
 
@@ -259,7 +264,7 @@ import com.facebook.react.uimanager.annotations.ReactProp;
   /* package */ final SpannableStringBuilder getText() {
     SpannableStringBuilder sb = new SpannableStringBuilder();
     collectText(sb);
-    applySpans(sb);
+    applySpans(sb, isEditable());
     return sb;
   }
 

ReactAndroid/src/main/java/com/facebook/react/flat/StateBuilder.java

@@ -233,7 +233,7 @@ import com.facebook.react.uimanager.events.EventDispatcher;
       float clipBottom) {
     boolean hasUpdates = node.hasNewLayout();
 
-    boolean expectingUpdate = hasUpdates || node.isUpdated() ||
+    boolean expectingUpdate = hasUpdates || node.isUpdated() || node.hasUnseenUpdates() ||
         node.clipBoundsChanged(clipLeft, clipTop, clipRight, clipBottom);
     if (SKIP_UP_TO_DATE_NODES && !expectingUpdate) {
       return false;