Move RecyclerConfiguration to top-level

Summary:
The nesting seems counter-intuitive as it's implemented by other top-level
classes and has the side-effect of being excluded from javadoc generation as
it's part of the spec and not the generated component.

Reviewed By: IanChilds, marco-cova

Differential Revision: D7287233

fbshipit-source-id: a73ccb1e75bd0bb4ec76df0c10a65e1538f021d2

litho-sections-widget/src/main/java/com/facebook/litho/sections/widget/GridRecyclerConfiguration.java

@@ -14,7 +14,6 @@
 import android.support.v7.widget.SnapHelper;
 import com.facebook.litho.ComponentContext;
 import com.facebook.litho.sections.SectionTree;
-import com.facebook.litho.sections.widget.RecyclerCollectionComponentSpec.RecyclerConfiguration;
 import com.facebook.litho.widget.Binder;
 import com.facebook.litho.widget.GridLayoutInfo;
 import com.facebook.litho.widget.RecyclerBinder;

litho-sections-widget/src/main/java/com/facebook/litho/sections/widget/ListRecyclerConfiguration.java

@@ -21,7 +21,6 @@
 import android.support.v7.widget.SnapHelper;
 import com.facebook.litho.ComponentContext;
 import com.facebook.litho.sections.SectionTree;
-import com.facebook.litho.sections.widget.RecyclerCollectionComponentSpec.RecyclerConfiguration;
 import com.facebook.litho.widget.Binder;
 import com.facebook.litho.widget.LinearLayoutInfo;
 import com.facebook.litho.widget.RecyclerBinder;

litho-sections-widget/src/main/java/com/facebook/litho/sections/widget/RecyclerCollectionComponentSpec.java

@@ -59,7 +59,6 @@
 import com.facebook.litho.widget.StaggeredGridLayoutHelper;
 import com.facebook.litho.widget.ViewportInfo;
 import java.util.List;
-import javax.annotation.Nullable;
 
 /**
  * A {@link Component} that renders a {@link Recycler} backed by a {@link Section} tree.
@@ -107,18 +106,6 @@ public class RecyclerCollectionComponentSpec {
   @PropDefault static final int refreshProgressBarColor = 0XFF4267B2; // blue
   private static final int MIN_SCROLL_FOR_PAGE = 20;
 
-  /**
-   * A configuration object the {@link RecyclerCollectionComponent} will use to determine which
-   * layout manager should be used for the {@link RecyclerView}
-   */
-  public interface RecyclerConfiguration {
-
-    <E extends Binder<RecyclerView> & Target> E buildTarget(ComponentContext c);
-
-    @Nullable
-    SnapHelper getSnapHelper();
-  }
-
   @OnCreateLayout
   static Component onCreateLayout(
       final ComponentContext c,

litho-sections-widget/src/main/java/com/facebook/litho/sections/widget/RecyclerConfiguration.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2017-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+package com.facebook.litho.sections.widget;
+
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.SnapHelper;
+import com.facebook.litho.ComponentContext;
+import com.facebook.litho.sections.SectionTree;
+import com.facebook.litho.widget.Binder;
+import javax.annotation.Nullable;
+
+/**
+ * A configuration object the {@link RecyclerCollectionComponent} will use to determine which layout
+ * manager should be used for the {@link RecyclerView}
+ */
+public interface RecyclerConfiguration {
+
+  <E extends Binder<RecyclerView> & SectionTree.Target> E buildTarget(ComponentContext c);
+
+  @Nullable
+  SnapHelper getSnapHelper();
+}

litho-sections-widget/src/main/java/com/facebook/litho/sections/widget/StaggeredGridRecyclerConfiguration.java

@@ -14,7 +14,6 @@
 import android.support.v7.widget.StaggeredGridLayoutManager;
 import com.facebook.litho.ComponentContext;
 import com.facebook.litho.sections.SectionTree;
-import com.facebook.litho.sections.widget.RecyclerCollectionComponentSpec.RecyclerConfiguration;
 import com.facebook.litho.widget.Binder;
 import com.facebook.litho.widget.RecyclerBinder;
 import com.facebook.litho.widget.StaggeredGridLayoutInfo;

sample/src/main/java/com/facebook/samples/litho/lithography/FeedImageComponentSpec.java

@@ -31,7 +31,7 @@
 import com.facebook.litho.sections.common.RenderEvent;
 import com.facebook.litho.sections.widget.ListRecyclerConfiguration;
 import com.facebook.litho.sections.widget.RecyclerCollectionComponent;
-import com.facebook.litho.sections.widget.RecyclerCollectionComponentSpec.RecyclerConfiguration;
+import com.facebook.litho.sections.widget.RecyclerConfiguration;
 import com.facebook.litho.widget.ComponentRenderInfo;
 import com.facebook.litho.widget.RenderInfo;
 import java.util.Arrays;