app/src/main/java/net/ktnx/mobileledger/ui/new_transaction/NewTransactionItemsAdapter.java

   1 /*
   2  * Copyright © 2021 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.ui.new_transaction;
  19
  20 import android.view.LayoutInflater;
  21 import android.view.ViewGroup;
  22
  23 import androidx.annotation.NonNull;
  24 import androidx.recyclerview.widget.AsyncListDiffer;
  25 import androidx.recyclerview.widget.DiffUtil;
  26 import androidx.recyclerview.widget.ItemTouchHelper;
  27 import androidx.recyclerview.widget.RecyclerView;
  28
  29 import net.ktnx.mobileledger.databinding.NewTransactionRowBinding;
  30 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  31 import net.ktnx.mobileledger.utils.Logger;
  32
  33 import java.util.List;
  34 import java.util.Locale;
  35 import java.util.Objects;
  36
  37 class NewTransactionItemsAdapter extends RecyclerView.Adapter<NewTransactionItemHolder> {
  38     final NewTransactionModel model;
  39     private final ItemTouchHelper touchHelper;
  40     private final AsyncListDiffer<NewTransactionModel.Item> differ =
  41             new AsyncListDiffer<>(this, new DiffUtil.ItemCallback<NewTransactionModel.Item>() {
  42                 @Override
  43                 public boolean areItemsTheSame(@NonNull NewTransactionModel.Item oldItem,
  44                                                @NonNull NewTransactionModel.Item newItem) {
  45 //                    Logger.debug("new-trans",
  46 //                            String.format("comparing ids of {%s} and {%s}", oldItem.toString(),
  47 //                                    newItem.toString()));
  48                     return oldItem.getId() == newItem.getId();
  49                 }
  50                 @Override
  51                 public boolean areContentsTheSame(@NonNull NewTransactionModel.Item oldItem,
  52                                                   @NonNull NewTransactionModel.Item newItem) {
  53
  54 //                    Logger.debug("new-trans",
  55 //                            String.format("comparing contents of {%s} and {%s}", oldItem
  56 //                            .toString(),
  57 //                                    newItem.toString()));
  58                     return oldItem.equalContents(newItem);
  59                 }
  60             });
  61     private MobileLedgerProfile mProfile;
  62     private int checkHoldCounter = 0;
  63     NewTransactionItemsAdapter(NewTransactionModel viewModel, MobileLedgerProfile profile) {
  64         super();
  65         setHasStableIds(true);
  66         model = viewModel;
  67         mProfile = profile;
  68
  69
  70         NewTransactionItemsAdapter adapter = this;
  71
  72         touchHelper = new ItemTouchHelper(new ItemTouchHelper.Callback() {
  73             @Override
  74             public boolean isLongPressDragEnabled() {
  75                 return true;
  76             }
  77             @Override
  78             public boolean canDropOver(@NonNull RecyclerView recyclerView,
  79                                        @NonNull RecyclerView.ViewHolder current,
  80                                        @NonNull RecyclerView.ViewHolder target) {
  81                 final int adapterPosition = target.getAdapterPosition();
  82
  83                 // first item is immovable
  84                 if (adapterPosition == 0)
  85                     return false;
  86
  87                 return super.canDropOver(recyclerView, current, target);
  88             }
  89             @Override
  90             public int getMovementFlags(@NonNull RecyclerView recyclerView,
  91                                         @NonNull RecyclerView.ViewHolder viewHolder) {
  92                 int flags = makeFlag(ItemTouchHelper.ACTION_STATE_IDLE, ItemTouchHelper.END);
  93                 // the top (date and description) and the bottom (padding) items are always there
  94                 final int adapterPosition = viewHolder.getAdapterPosition();
  95                 if (adapterPosition > 0) {
  96                     flags |= makeFlag(ItemTouchHelper.ACTION_STATE_DRAG,
  97                             ItemTouchHelper.UP | ItemTouchHelper.DOWN) |
  98                              makeFlag(ItemTouchHelper.ACTION_STATE_SWIPE,
  99                                      ItemTouchHelper.START | ItemTouchHelper.END);
 100                 }
 101
 102                 return flags;
 103             }
 104             @Override
 105             public boolean onMove(@NonNull RecyclerView recyclerView,
 106                                   @NonNull RecyclerView.ViewHolder viewHolder,
 107                                   @NonNull RecyclerView.ViewHolder target) {
 108
 109                 model.moveItem(viewHolder.getAdapterPosition(), target.getAdapterPosition());
 110                 return true;
 111             }
 112             @Override
 113             public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
 114                 int pos = viewHolder.getAdapterPosition();
 115                 viewModel.removeItem(pos);
 116             }
 117         });
 118     }
 119     @Override
 120     public long getItemId(int position) {
 121         return differ.getCurrentList()
 122                      .get(position)
 123                      .getId();
 124     }
 125     public void setProfile(MobileLedgerProfile profile) {
 126         mProfile = profile;
 127     }
 128     @NonNull
 129     @Override
 130     public NewTransactionItemHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
 131         NewTransactionRowBinding b =
 132                 NewTransactionRowBinding.inflate(LayoutInflater.from(parent.getContext()), parent,
 133                         false);
 134
 135         final NewTransactionItemHolder newHolder = new NewTransactionItemHolder(b, this);
 136         Logger.debug("new-trans",
 137                 "Creating new ViewHolder " + Integer.toHexString(newHolder.hashCode()));
 138         return newHolder;
 139     }
 140     @Override
 141     public void onBindViewHolder(@NonNull NewTransactionItemHolder holder, int position) {
 142         Logger.debug("bind",
 143                 String.format(Locale.US, "Binding item at position %d, holder %s", position,
 144                         Integer.toHexString(holder.hashCode())));
 145         NewTransactionModel.Item item = Objects.requireNonNull(differ.getCurrentList()
 146                                                                      .get(position));
 147         holder.bind(item);
 148         Logger.debug("bind", String.format(Locale.US, "Bound %s item at position %d", item.getType()
 149                                                                                           .toString(),
 150                 position));
 151     }
 152     @Override
 153     public int getItemCount() {
 154         return differ.getCurrentList()
 155                      .size();
 156     }
 157     @Override
 158     public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
 159         super.onAttachedToRecyclerView(recyclerView);
 160         touchHelper.attachToRecyclerView(recyclerView);
 161     }
 162     @Override
 163     public void onDetachedFromRecyclerView(@NonNull RecyclerView recyclerView) {
 164         touchHelper.attachToRecyclerView(null);
 165         super.onDetachedFromRecyclerView(recyclerView);
 166     }
 167     void noteFocusIsOnAccount(int position) {
 168         model.noteFocusChanged(position, FocusedElement.Account);
 169     }
 170     void noteFocusIsOnAmount(int position) {
 171         model.noteFocusChanged(position, FocusedElement.Amount);
 172     }
 173     void noteFocusIsOnComment(int position) {
 174         model.noteFocusChanged(position, FocusedElement.Comment);
 175     }
 176     void noteFocusIsOnTransactionComment(int position) {
 177         model.noteFocusChanged(position, FocusedElement.TransactionComment);
 178     }
 179     public void noteFocusIsOnDescription(int pos) {
 180         model.noteFocusChanged(pos, FocusedElement.Description);
 181     }
 182     private void holdSubmittableChecks() {
 183         checkHoldCounter++;
 184     }
 185     private void releaseSubmittableChecks() {
 186         if (checkHoldCounter == 0)
 187             throw new RuntimeException("Asymmetrical call to releaseSubmittableChecks");
 188         checkHoldCounter--;
 189     }
 190     void setItemCurrency(int position, String newCurrency) {
 191         model.setItemCurrency(position, newCurrency);
 192     }
 193
 194     public void setItems(List<NewTransactionModel.Item> newList) {
 195         Logger.debug("new-trans", "adapter: submitting new item list");
 196         differ.submitList(newList);
 197     }
 198 }