[core] auto value for 'text-justify' field

include/mbgl/style/types.hpp

@@ -81,6 +81,7 @@ enum class AlignmentType : uint8_t {
 };
 
 enum class TextJustifyType : uint8_t {
+    Auto,
     Center,
     Left,
     Right

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/Property.java

@@ -322,6 +322,10 @@ public final class Property {
 
   // TEXT_JUSTIFY: Text justification options.
 
+  /**
+   * The text is aligned towards the anchor position.
+   */
+  public static final String TEXT_JUSTIFY_AUTO = "auto";
   /**
    * The text is aligned to the left.
    */
@@ -339,6 +343,7 @@ public final class Property {
    * Text justification options.
    */
   @StringDef({
+      TEXT_JUSTIFY_AUTO,
       TEXT_JUSTIFY_LEFT,
       TEXT_JUSTIFY_CENTER,
       TEXT_JUSTIFY_RIGHT,

platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/style/SymbolLayerTest.java

@@ -559,7 +559,7 @@ public class SymbolLayerTest extends BaseLayerTest {
     assertNull(layer.getTextJustify().getValue());
 
     // Set and Get
-    String propertyValue = TEXT_JUSTIFY_LEFT;
+    String propertyValue = TEXT_JUSTIFY_AUTO;
     layer.setProperties(textJustify(propertyValue));
     assertEquals(layer.getTextJustify().getValue(), propertyValue);
   }

scripts/style-spec.js

@@ -3,6 +3,4 @@ var spec = module.exports = require('../mapbox-gl-js/src/style-spec/reference/v8
 // Make temporary modifications here when Native doesn't have all features that JS has.
 delete spec.layout_symbol['symbol-sort-key'];
 delete spec.layout_symbol['symbol-z-order'].values['auto'];
-spec.layout_symbol['symbol-z-order'].default = 'viewport-y';
-
-delete spec.layout_symbol['text-justify'].values['auto'];
+spec.layout_symbol['symbol-z-order'].default = 'viewport-y';

src/mbgl/style/types.cpp

@@ -83,6 +83,7 @@ MBGL_DEFINE_ENUM(SymbolZOrderType, {
 });
 
 MBGL_DEFINE_ENUM(TextJustifyType, {
+    { TextJustifyType::Auto, "auto" },
     { TextJustifyType::Center, "center" },
     { TextJustifyType::Left, "left" },
     { TextJustifyType::Right, "right" },