move diffutil callback to an external file

2 files changed, 36 insertions, 30 deletions

diff --git a/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java b/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java
index df59d863..e008173a 100755
--- a/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java
+++ b/org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java
@@ -75,6 +75,7 @@ import org.fox.ttrss.types.Article;
 import org.fox.ttrss.types.ArticleList;
 import org.fox.ttrss.types.Attachment;
 import org.fox.ttrss.types.Feed;
+import org.fox.ttrss.util.HeadlinesDiffutilCallback;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
 
@@ -87,36 +88,6 @@ import jp.wasabeef.glide.transformations.CropCircleTransformation;
 
 public class HeadlinesFragment extends androidx.fragment.app.Fragment implements LoaderManager.LoaderCallbacks<ArticleList> {
 
-	public class HeadlinesDiffutilCallback extends DiffUtil.Callback {
-		private ArticleList m_oldList;
-		private ArticleList m_newList;
-
-		public HeadlinesDiffutilCallback(ArticleList oldList, ArticleList newList) {
-			m_oldList = oldList;
-			m_newList = newList;
-		}
-
-		@Override
-		public int getOldListSize() {
-			return m_oldList != null ? m_oldList.size() : 0;
-		}
-
-		@Override
-		public int getNewListSize() {
-			return m_newList != null ? m_newList.size() : 0;
-		}
-
-		@Override
-		public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
-			return m_newList.get(newItemPosition).id == m_oldList.get(oldItemPosition).id;
-		}
-
-		@Override
-		public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
-			return false;
-		}
-	}
-
 	@NonNull
 	@Override
 	public Loader<ArticleList> onCreateLoader(int id, @Nullable Bundle args) {
diff --git a/org.fox.ttrss/src/main/java/org/fox/ttrss/util/HeadlinesDiffutilCallback.java b/org.fox.ttrss/src/main/java/org/fox/ttrss/util/HeadlinesDiffutilCallback.java
new file mode 100644
index 00000000..b968e285
--- /dev/null
+++ b/org.fox.ttrss/src/main/java/org/fox/ttrss/util/HeadlinesDiffutilCallback.java
@@ -0,0 +1,35 @@
+package org.fox.ttrss.util;
+
+import androidx.recyclerview.widget.DiffUtil;
+
+import org.fox.ttrss.types.ArticleList;
+
+public class HeadlinesDiffutilCallback extends DiffUtil.Callback {
+		private ArticleList m_oldList;
+		private ArticleList m_newList;
+
+		public HeadlinesDiffutilCallback(ArticleList oldList, ArticleList newList) {
+			m_oldList = oldList;
+			m_newList = newList;
+		}
+
+		@Override
+		public int getOldListSize() {
+			return m_oldList != null ? m_oldList.size() : 0;
+		}
+
+		@Override
+		public int getNewListSize() {
+			return m_newList != null ? m_newList.size() : 0;
+		}
+
+		@Override
+		public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
+			return m_newList.get(newItemPosition).id == m_oldList.get(oldItemPosition).id;
+		}
+
+		@Override
+		public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
+			return false;
+		}
+	}