Fix StyleSheet 'textAlign' for AndroidTextInput. Closes #2702

Summary:
change `setTextAlign` and `setTextAlignVertical` to receive argument of type `String` (the same as in `StyleSheet`), so that native props and stylesheet props are calling the same ReactMethod

- add demo (may not be necessary)
Closes https://github.com/facebook/react-native/pull/4481

Reviewed By: svcscm

Differential Revision: D2823456

Pulled By: mkonicek

fb-gh-sync-id: 349d17549f419b5bdc001d70b583423ade06bfe8

Examples/UIExplorer/TextInputExample.android.js

@@ -348,25 +348,19 @@ exports.examples = [
             placeholder="multiline, aligned top-left"
             placeholderTextColor="red"
             multiline={true}
-            textAlign="start"
-            textAlignVertical="top"
-            style={styles.multiline}
+            style={[styles.multiline, {textAlign: "left", textAlignVertical: "top"}]}
           />
           <TextInput
             autoCorrect={true}
             placeholder="multiline, aligned center"
             placeholderTextColor="green"
             multiline={true}
-            textAlign="center"
-            textAlignVertical="center"
-            style={[styles.multiline]}
+            style={[styles.multiline, {textAlign: "center", textAlignVertical: "center"}]}
           />
           <TextInput
             autoCorrect={true}
             multiline={true}
-            textAlign="end"
-            textAlignVertical="bottom"
-            style={[styles.multiline, {color: 'blue'}]}>
+            style={[styles.multiline, {color: 'blue'}, {textAlign: "right", textAlignVertical: "bottom"}]}>
             <Text style={styles.multiline}>multiline with children, aligned bottom-right</Text>
           </TextInput>
         </View>

Libraries/Components/TextInput/TextInput.js

@@ -101,24 +101,6 @@ var TextInput = React.createClass({
      * The default value is false.
      */
     autoFocus: PropTypes.bool,
-    /**
-     * Set the position of the cursor from where editing will begin.
-     * @platform android
-     */
-    textAlign: PropTypes.oneOf([
-      'start',
-      'center',
-      'end',
-    ]),
-    /**
-     * Aligns text vertically within the TextInput.
-     * @platform android
-     */
-    textAlignVertical: PropTypes.oneOf([
-      'top',
-      'center',
-      'bottom',
-    ]),
     /**
      * If false, text is not editable. The default value is true.
      */
@@ -491,10 +473,6 @@ var TextInput = React.createClass({
 
     var autoCapitalize =
       UIManager.AndroidTextInput.Constants.AutoCapitalizationType[this.props.autoCapitalize];
-    var textAlign = UIManager.AndroidTextInput.Constants.TextAlign[this.props.textAlign];
-    var textAlignVertical =
-      UIManager.AndroidTextInput.Constants.TextAlignVertical[this.props.textAlignVertical];
-
     var children = this.props.children;
     var childCount = 0;
     ReactChildren.forEach(children, () => ++childCount);
@@ -512,8 +490,6 @@ var TextInput = React.createClass({
         style={[this.props.style]}
         autoCapitalize={autoCapitalize}
         autoCorrect={this.props.autoCorrect}
-        textAlign={textAlign}
-        textAlignVertical={textAlignVertical}
         keyboardType={this.props.keyboardType}
         mostRecentEventCount={0}
         multiline={this.props.multiline}

Libraries/Text/TextStylePropTypes.js

@@ -46,6 +46,12 @@ var TextStylePropTypes = Object.assign(Object.create(ViewStylePropTypes), {
   textAlign: ReactPropTypes.oneOf(
     ['auto' /*default*/, 'left', 'right', 'center', 'justify']
   ),
+  /**
+   * @platform android
+   */
+  textAlignVertical: ReactPropTypes.oneOf(
+    ['auto' /*default*/, 'top', 'bottom', 'center']
+  ),
   /**
    * @platform ios
    */

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

@@ -70,6 +70,7 @@ public class ViewProps {
   public static final String ON = "on";
   public static final String RESIZE_MODE = "resizeMode";
   public static final String TEXT_ALIGN = "textAlign";
+  public static final String TEXT_ALIGN_VERTICAL = "textAlignVertical";
 
   public static final String BORDER_WIDTH = "borderWidth";
   public static final String BORDER_LEFT_WIDTH = "borderLeftWidth";

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

@@ -28,6 +28,8 @@ import android.view.inputmethod.EditorInfo;
 import android.widget.TextView;
 
 import com.facebook.infer.annotation.Assertions;
+import com.facebook.react.bridge.JSApplicationCausedNativeException;
+import com.facebook.react.bridge.JSApplicationIllegalArgumentException;
 import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.common.MapBuilder;
@@ -202,14 +204,34 @@ public class ReactTextInputManager extends
     }
   }
 
-  @ReactProp(name = "textAlign")
-  public void setTextAlign(ReactEditText view, int gravity) {
-    view.setGravityHorizontal(gravity);
+  @ReactProp(name = ViewProps.TEXT_ALIGN)
+  public void setTextAlign(ReactEditText view, @Nullable String textAlign) {
+    if (textAlign == null || "auto".equals(textAlign)) {
+      view.setGravityHorizontal(Gravity.NO_GRAVITY);
+    } else if ("left".equals(textAlign)) {
+      view.setGravityHorizontal(Gravity.LEFT);
+    } else if ("right".equals(textAlign)) {
+      view.setGravityHorizontal(Gravity.RIGHT);
+    } else if ("center".equals(textAlign)) {
+      view.setGravityHorizontal(Gravity.CENTER_HORIZONTAL);
+    } else {
+      throw new JSApplicationIllegalArgumentException("Invalid textAlign: " + textAlign);
+    }
   }
 
-  @ReactProp(name = "textAlignVertical")
-  public void setTextAlignVertical(ReactEditText view, int gravity) {
-    view.setGravityVertical(gravity);
+  @ReactProp(name = ViewProps.TEXT_ALIGN_VERTICAL)
+  public void setTextAlignVertical(ReactEditText view, @Nullable String textAlignVertical) {
+    if (textAlignVertical == null || "auto".equals(textAlignVertical)) {
+      view.setGravityVertical(Gravity.NO_GRAVITY);
+    } else if ("top".equals(textAlignVertical)) {
+      view.setGravityVertical(Gravity.TOP);
+    } else if ("bottom".equals(textAlignVertical)) {
+      view.setGravityVertical(Gravity.BOTTOM);
+    } else if ("center".equals(textAlignVertical)) {
+      view.setGravityVertical(Gravity.CENTER_VERTICAL);
+    } else {
+      throw new JSApplicationIllegalArgumentException("Invalid textAlignVertical: " + textAlignVertical);
+    }
   }
 
   @ReactProp(name = "editable", defaultBoolean = true)
@@ -474,16 +496,6 @@ public class ReactTextInputManager extends
   @Override
   public @Nullable Map getExportedViewConstants() {
     return MapBuilder.of(
-        "TextAlign",
-        MapBuilder.of(
-            "start", Gravity.START,
-            "center", Gravity.CENTER_HORIZONTAL,
-            "end", Gravity.END),
-        "TextAlignVertical",
-        MapBuilder.of(
-            "top", Gravity.TOP,
-            "center", Gravity.CENTER_VERTICAL,
-            "bottom", Gravity.BOTTOM),
         "AutoCapitalizationType",
         MapBuilder.of(
             "none",