From dc92e69867bef0ea29ddc59e293e053eb8ce5bdb Mon Sep 17 00:00:00 2001
From: Ramanpreet Nara <ramanpreet@fb.com>
Date: Wed, 18 Oct 2017 19:29:48 -0700
Subject: [PATCH] Android: Forward RN start/end styles to Yoga

Reviewed By: AaaChiuuu

Differential Revision: D5906097

fbshipit-source-id: 79bd43ea54572eb612e781628551bccf5a4f948d
---
 .../react/uimanager/LayoutShadowNode.java     | 32 ++++++-
 .../facebook/react/uimanager/ViewProps.java   | 95 ++++++++++---------
 2 files changed, 78 insertions(+), 49 deletions(-)

diff --git a/ReactAndroid/src/main/java/com/facebook/react/uimanager/LayoutShadowNode.java b/ReactAndroid/src/main/java/com/facebook/react/uimanager/LayoutShadowNode.java
index 873c7d09f..788f85df2 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/uimanager/LayoutShadowNode.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/uimanager/LayoutShadowNode.java
@@ -5,6 +5,7 @@ package com.facebook.react.uimanager;
 import com.facebook.react.bridge.Dynamic;
 import com.facebook.react.bridge.JSApplicationIllegalArgumentException;
 import com.facebook.react.bridge.ReadableType;
+import com.facebook.react.modules.i18nmanager.I18nUtil;
 import com.facebook.react.uimanager.annotations.ReactProp;
 import com.facebook.react.uimanager.annotations.ReactPropGroup;
 import com.facebook.yoga.YogaAlign;
@@ -623,25 +624,48 @@ public class LayoutShadowNode extends ReactShadowNodeImpl {
     setBorder(ViewProps.BORDER_SPACING_TYPES[index], PixelUtil.toPixelFromDIP(borderWidth));
   }
 
-  @ReactPropGroup(names = {
+  @ReactPropGroup(
+    names = {
+      ViewProps.START,
+      ViewProps.END,
       ViewProps.LEFT,
       ViewProps.RIGHT,
       ViewProps.TOP,
       ViewProps.BOTTOM,
-  })
+    }
+  )
   public void setPositionValues(int index, Dynamic position) {
     if (isVirtual()) {
       return;
     }
 
+    final int[] POSITION_SPACING_TYPES = {
+      Spacing.START, Spacing.END, Spacing.LEFT, Spacing.RIGHT, Spacing.TOP, Spacing.BOTTOM
+    };
+
+    int spacingType = POSITION_SPACING_TYPES[index];
+
+    if (I18nUtil.getInstance().doesRTLFlipLeftAndRightStyles(getThemedContext())) {
+      switch (spacingType) {
+        case Spacing.LEFT:
+          spacingType = Spacing.START;
+          break;
+        case Spacing.RIGHT:
+          spacingType = Spacing.END;
+          break;
+        default:
+          break;
+      }
+    }
+
     mTempYogaValue.setFromDynamic(position);
     switch (mTempYogaValue.unit) {
       case POINT:
       case UNDEFINED:
-        setPosition(ViewProps.POSITION_SPACING_TYPES[index], mTempYogaValue.value);
+        setPosition(spacingType, mTempYogaValue.value);
         break;
       case PERCENT:
-        setPositionPercent(ViewProps.POSITION_SPACING_TYPES[index], mTempYogaValue.value);
+        setPositionPercent(spacingType, mTempYogaValue.value);
         break;
     }
 
diff --git a/ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewProps.java b/ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewProps.java
index 9ddcb416e..97075e8c5 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewProps.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewProps.java
@@ -60,6 +60,8 @@ public class ViewProps {
   public static final String RIGHT = "right";
   public static final String TOP = "top";
   public static final String WIDTH = "width";
+  public static final String START = "start";
+  public static final String END = "end";
 
   public static final String MIN_WIDTH = "minWidth";
   public static final String MAX_WIDTH = "maxWidth";
@@ -118,57 +120,60 @@ public class ViewProps {
       Spacing.BOTTOM
   };
   public static final int[] POSITION_SPACING_TYPES = {
-      Spacing.START, Spacing.END, Spacing.TOP, Spacing.BOTTOM
+    Spacing.START, Spacing.END, Spacing.TOP, Spacing.BOTTOM
   };
 
-  private static final HashSet<String> LAYOUT_ONLY_PROPS = new HashSet<>(
-      Arrays.asList(
-            ALIGN_SELF,
-            ALIGN_ITEMS,
-            COLLAPSABLE,
-            FLEX,
-            FLEX_BASIS,
-            FLEX_DIRECTION,
-            FLEX_GROW,
-            FLEX_SHRINK,
-            FLEX_WRAP,
-            JUSTIFY_CONTENT,
-            OVERFLOW,
-            ALIGN_CONTENT,
-            DISPLAY,
+  private static final HashSet<String> LAYOUT_ONLY_PROPS =
+      new HashSet<>(
+          Arrays.asList(
+              ALIGN_SELF,
+              ALIGN_ITEMS,
+              COLLAPSABLE,
+              FLEX,
+              FLEX_BASIS,
+              FLEX_DIRECTION,
+              FLEX_GROW,
+              FLEX_SHRINK,
+              FLEX_WRAP,
+              JUSTIFY_CONTENT,
+              OVERFLOW,
+              ALIGN_CONTENT,
+              DISPLAY,
 
-            /* position */
-            POSITION,
-            RIGHT,
-            TOP,
-            BOTTOM,
-            LEFT,
+              /* position */
+              POSITION,
+              RIGHT,
+              TOP,
+              BOTTOM,
+              LEFT,
+              START,
+              END,
 
-            /* dimensions */
-            WIDTH,
-            HEIGHT,
-            MIN_WIDTH,
-            MAX_WIDTH,
-            MIN_HEIGHT,
-            MAX_HEIGHT,
+              /* dimensions */
+              WIDTH,
+              HEIGHT,
+              MIN_WIDTH,
+              MAX_WIDTH,
+              MIN_HEIGHT,
+              MAX_HEIGHT,
 
-            /* margins */
-            MARGIN,
-            MARGIN_VERTICAL,
-            MARGIN_HORIZONTAL,
-            MARGIN_LEFT,
-            MARGIN_RIGHT,
-            MARGIN_TOP,
-            MARGIN_BOTTOM,
+              /* margins */
+              MARGIN,
+              MARGIN_VERTICAL,
+              MARGIN_HORIZONTAL,
+              MARGIN_LEFT,
+              MARGIN_RIGHT,
+              MARGIN_TOP,
+              MARGIN_BOTTOM,
 
-            /* paddings */
-            PADDING,
-            PADDING_VERTICAL,
-            PADDING_HORIZONTAL,
-            PADDING_LEFT,
-            PADDING_RIGHT,
-            PADDING_TOP,
-            PADDING_BOTTOM));
+              /* paddings */
+              PADDING,
+              PADDING_VERTICAL,
+              PADDING_HORIZONTAL,
+              PADDING_LEFT,
+              PADDING_RIGHT,
+              PADDING_TOP,
+              PADDING_BOTTOM));
 
   public static boolean sIsOptimizationsEnabled;