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[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / ui / transaction_list / TransactionListAdapter.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListAdapter.java b/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListAdapter.java
index c61b9193d69e5071c781d43e122a4ab648524189..58468e88c33fef7ddf7ef06ca4fda8bf7dd5be6c 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListAdapter.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListAdapter.java
@@ -33,6 +33,8 @@ import android.widget.TextView;
 
 import androidx.annotation.ColorInt;
 import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.AsyncListDiffer;
+import androidx.recyclerview.widget.DiffUtil;
 import androidx.recyclerview.widget.RecyclerView;
 
 import net.ktnx.mobileledger.App;
@@ -40,6 +42,7 @@ import net.ktnx.mobileledger.R;
 import net.ktnx.mobileledger.model.Data;
 import net.ktnx.mobileledger.model.LedgerTransaction;
 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
+import net.ktnx.mobileledger.model.MobileLedgerProfile;
 import net.ktnx.mobileledger.model.TransactionListItem;
 import net.ktnx.mobileledger.utils.Colors;
 import net.ktnx.mobileledger.utils.Globals;
@@ -48,9 +51,53 @@ import net.ktnx.mobileledger.utils.SimpleDate;
 
 import java.text.DateFormat;
 import java.util.GregorianCalendar;
+import java.util.Locale;
 import java.util.TimeZone;
 
 public class TransactionListAdapter extends RecyclerView.Adapter<TransactionRowHolder> {
+    private MobileLedgerProfile profile;
+    private AsyncListDiffer<TransactionListItem> listDiffer;
+    public TransactionListAdapter() {
+        super();
+        listDiffer = new AsyncListDiffer<>(this, new DiffUtil.ItemCallback<TransactionListItem>() {
+            @Override
+            public boolean areItemsTheSame(@NonNull TransactionListItem oldItem,
+                                           @NonNull TransactionListItem newItem) {
+                if (oldItem.getType() != newItem.getType())
+                    return false;
+                switch (oldItem.getType()) {
+                    case DELIMITER:
+                        return (oldItem.getDate()
+                                       .equals(newItem.getDate()));
+                    case TRANSACTION:
+                        return oldItem.getTransaction()
+                                      .getId() == newItem.getTransaction()
+                                                         .getId();
+                    default:
+                        throw new IllegalStateException(
+                                String.format(Locale.US, "Unexpected transaction item type %s",
+                                        oldItem.getType()));
+                }
+            }
+            @Override
+            public boolean areContentsTheSame(@NonNull TransactionListItem oldItem,
+                                              @NonNull TransactionListItem newItem) {
+                switch (oldItem.getType()) {
+                    case DELIMITER:
+                        // Delimiters items are "same" for same dates and the contents are the date
+                        return true;
+                    case TRANSACTION:
+                        return oldItem.getTransaction()
+                                      .equals(newItem.getTransaction());
+                    default:
+                        throw new IllegalStateException(
+                                String.format(Locale.US, "Unexpected transaction item type %s",
+                                        oldItem.getType()));
+
+                }
+            }
+        });
+    }
     public void onBindViewHolder(@NonNull TransactionRowHolder holder, int position) {
         TransactionListItem item = TransactionListViewModel.getTransactionListItem(position);
 
@@ -180,11 +227,9 @@ public class TransactionListAdapter extends RecyclerView.Adapter<TransactionRowH
                     Context ctx = holder.row.getContext();
                     LinearLayout row = (LinearLayout) holder.tableAccounts.getChildAt(rowIndex);
                     if (row == null) {
+                        row = new LinearLayout(ctx);
                         LayoutInflater inflater = ((Activity) ctx).getLayoutInflater();
-                        row = (LinearLayout) inflater.inflate(
-                                R.layout.transaction_list_row_accounts_table_row, null);
-                        // if the rootView above is given (and the line below is spared)
-                        // the accounts remain with their default text (set in the layout resource)
+                        inflater.inflate(R.layout.transaction_list_row_accounts_table_row, row);
                         holder.tableAccounts.addView(row);
                     }
                     TextView dummyText = row.findViewById(R.id.dummy_text);
@@ -242,7 +287,7 @@ public class TransactionListAdapter extends RecyclerView.Adapter<TransactionRowH
         }
     }
 
-    private class TransactionLoaderParams {
+    private static class TransactionLoaderParams {
         LedgerTransaction transaction;
         TransactionRowHolder holder;
         int position;