add errorMessage to ReactTextUpdate and maybeSetErrorMessage

allow to display error message on TextInput triggered in a onChangeText
callback. Fixes issue explained in:
fabOnReact/react-native-notes#12 (comment)

Related links:
fabOnReact/react-native-notes#12 (comment)
fabOnReact@d3d54e1

Author: fabOnReact

Libraries/Components/TextInput/AndroidTextInputNativeComponent.js

@@ -698,6 +698,7 @@ export const __INTERNAL_VIEW_CONFIG: PartialViewConfig = {
     inlineImageLeft: true,
     editable: true,
     fontVariant: true,
+    android_errorMessage: true,
     borderBottomRightRadius: true,
     borderBottomColor: {process: require('../../StyleSheet/processColor')},
     borderRadius: true,

ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewProps.java

@@ -84,7 +84,7 @@ public class ViewProps {
   public static final String BACKGROUND_COLOR = "backgroundColor";
   public static final String FOREGROUND_COLOR = "foregroundColor";
   public static final String COLOR = "color";
-  public static final String ERROR_MESSAGE = "errorMessage";
+  public static final String ANDROID_ERROR_MESSAGE = "android_errorMessage";
   public static final String FONT_SIZE = "fontSize";
   public static final String FONT_WEIGHT = "fontWeight";
   public static final String FONT_STYLE = "fontStyle";

ReactAndroid/src/main/java/com/facebook/react/views/text/ReactTextUpdate.java

@@ -11,6 +11,7 @@
 
 import android.text.Layout;
 import android.text.Spannable;
+import javax.annotation.Nullable;
 
 /**
  * Class that contains the data needed for a text update. Used by both <Text/> and <TextInput/>
@@ -30,6 +31,7 @@ public class ReactTextUpdate {
   private final int mSelectionStart;
   private final int mSelectionEnd;
   private final int mJustificationMode;
+  private @Nullable String mErrorMessage;
 
   public boolean mContainsMultipleFragments;
 
@@ -59,7 +61,8 @@ public ReactTextUpdate(
         Layout.BREAK_STRATEGY_HIGH_QUALITY,
         Layout.JUSTIFICATION_MODE_NONE,
         -1,
-        -1);
+        -1,
+        null);
   }
 
   public ReactTextUpdate(
@@ -85,7 +88,8 @@ public ReactTextUpdate(
         textBreakStrategy,
         justificationMode,
         -1,
-        -1);
+        -1,
+        null);
   }
 
   public ReactTextUpdate(
@@ -107,7 +111,8 @@ public ReactTextUpdate(
         textBreakStrategy,
         justificationMode,
         -1,
-        -1);
+        -1,
+        null);
   }
 
   public ReactTextUpdate(
@@ -122,7 +127,8 @@ public ReactTextUpdate(
       int textBreakStrategy,
       int justificationMode,
       int selectionStart,
-      int selectionEnd) {
+      int selectionEnd,
+      @Nullable String errorMessage) {
     mText = text;
     mJsEventCounter = jsEventCounter;
     mContainsImages = containsImages;
@@ -135,6 +141,7 @@ public ReactTextUpdate(
     mSelectionStart = selectionStart;
     mSelectionEnd = selectionEnd;
     mJustificationMode = justificationMode;
+    mErrorMessage = errorMessage;
   }
 
   public static ReactTextUpdate buildReactTextUpdateFromState(
@@ -143,15 +150,21 @@ public static ReactTextUpdate buildReactTextUpdateFromState(
       int textAlign,
       int textBreakStrategy,
       int justificationMode,
-      boolean containsMultipleFragments) {
+      boolean containsMultipleFragments,
+      @Nullable String errorMessage) {
 
     ReactTextUpdate reactTextUpdate =
         new ReactTextUpdate(
             text, jsEventCounter, false, textAlign, textBreakStrategy, justificationMode);
     reactTextUpdate.mContainsMultipleFragments = containsMultipleFragments;
+    reactTextUpdate.mErrorMessage = errorMessage;
     return reactTextUpdate;
   }
 
+  public @Nullable String getErrorMessage() {
+    return mErrorMessage;
+  }
+
   public Spannable getText() {
     return mText;
   }

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

@@ -509,6 +509,20 @@ public void maybeSetTextFromJS(ReactTextUpdate reactTextUpdate) {
     mIsSettingTextFromJS = false;
   }
 
+  /**
+   * Attempt to set an error message or fail silently. EventCounter is the same one used as with
+   * text.
+   *
+   * @param eventCounter
+   * @param errorMessage
+   */
+  public void maybeSetErrorMessage(int eventCounter, String errorMessage) {
+    if (!canUpdateWithEventCount(eventCounter) || getError() == errorMessage) {
+      return;
+    }
+    setError(errorMessage);
+  }
+
   public void maybeSetTextFromState(ReactTextUpdate reactTextUpdate) {
     mIsSettingTextFromState = true;
     maybeSetText(reactTextUpdate);

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java

@@ -325,7 +325,7 @@ private ReactTextUpdate getReactTextUpdate(
     sb.append(TextTransform.apply(text, TextTransform.UNSET));
 
     return new ReactTextUpdate(
-        sb, mostRecentEventCount, false, 0, 0, 0, 0, Gravity.NO_GRAVITY, 0, 0, start, end);
+        sb, mostRecentEventCount, false, 0, 0, 0, 0, Gravity.NO_GRAVITY, 0, 0, start, end, null);
   }
 
   @Override
@@ -369,11 +369,12 @@ public void updateExtraData(ReactEditText view, Object extraData) {
 
       view.maybeSetTextFromState(update);
       view.maybeSetSelection(update.getJsEventCounter(), selectionStart, selectionEnd);
+      view.maybeSetErrorMessage(update.getJsEventCounter(), update.getErrorMessage());
     }
   }
 
-  @ReactProp(name = ViewProps.ERROR_MESSAGE)
-  public void setAndroidErrorMessage(ReactEditText view, String error) {
+  @ReactProp(name = ViewProps.ANDROID_ERROR_MESSAGE)
+  public void setErrorMessage(ReactEditText view, String error) {
     view.setError(error);
   }
 
@@ -1325,12 +1326,19 @@ public Object updateState(
     int textBreakStrategy =
         TextAttributeProps.getTextBreakStrategy(paragraphAttributes.getString("textBreakStrategy"));
 
+    @Nullable
+    String errorMessage =
+        props.hasKey(ViewProps.ANDROID_ERROR_MESSAGE)
+            ? props.getString(ViewProps.ANDROID_ERROR_MESSAGE)
+            : null;
+
     return ReactTextUpdate.buildReactTextUpdateFromState(
         spanned,
         state.getInt("mostRecentEventCount"),
         TextAttributeProps.getTextAlignment(props, TextLayoutManager.isRTL(attributedString)),
         textBreakStrategy,
         TextAttributeProps.getJustificationMode(props),
-        containsMultipleFragments);
+        containsMultipleFragments,
+        errorMessage);
   }
 }

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputShadowNode.java

@@ -246,7 +246,8 @@ public void onCollectExtraUpdates(UIViewOperationQueue uiViewOperationQueue) {
               mTextBreakStrategy,
               mJustificationMode,
               mSelectionStart,
-              mSelectionEnd);
+              mSelectionEnd,
+              null);
       uiViewOperationQueue.enqueueUpdateExtraData(getReactTag(), reactTextUpdate);
     }
   }

packages/rn-tester/js/examples/TextInput/TextInputSharedExamples.js

@@ -483,7 +483,7 @@ function ErrorExample(): React.Node {
         Type error in the below TextInput to display an error message.
       </Text>
       <TextInput
-        errorMessage={error}
+        android_errorMessage={error}
         onBlur={() => setError('onBlur')}
         onEndEditing={() => setError('onEndEditing')}
         onChangeText={newText => {