Added certificate selection

app/src/main/java/eu/faircode/email/AdapterCertificate.java

@@ -0,0 +1,186 @@
+package eu.faircode.email;
+
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2019 by Marcel Bokhorst (M66B)
+*/
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.LifecycleOwner;
+import androidx.recyclerview.widget.DiffUtil;
+import androidx.recyclerview.widget.ListUpdateCallback;
+import androidx.recyclerview.widget.RecyclerView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class AdapterCertificate extends RecyclerView.Adapter<AdapterCertificate.ViewHolder> {
+    private ICertificate intf;
+    private Context context;
+    private LifecycleOwner owner;
+    private LayoutInflater inflater;
+
+    private List<EntityCertificate> items = new ArrayList<>();
+
+    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
+        private View view;
+        private TextView tvEmail;
+        private TextView tvSubject;
+
+        ViewHolder(View itemView) {
+            super(itemView);
+
+            view = itemView.findViewById(R.id.clItem);
+            tvEmail = itemView.findViewById(R.id.tvEmail);
+            tvSubject = itemView.findViewById(R.id.tvSubject);
+        }
+
+        @Override
+        public void onClick(View v) {
+            int pos = getAdapterPosition();
+            if (pos == RecyclerView.NO_POSITION)
+                return;
+
+            EntityCertificate certificate = items.get(pos);
+            intf.onSelected(certificate);
+        }
+
+        private void wire() {
+            view.setOnClickListener(this);
+        }
+
+        private void unwire() {
+            view.setOnClickListener(null);
+        }
+
+        private void bindTo(EntityCertificate certificate) {
+            tvEmail.setText(certificate.email);
+            tvSubject.setText(certificate.subject);
+        }
+    }
+
+    AdapterCertificate(Fragment parentFragment, ICertificate intf) {
+        this.intf = intf;
+        this.context = parentFragment.getContext();
+        this.owner = parentFragment.getViewLifecycleOwner();
+        this.inflater = LayoutInflater.from(parentFragment.getContext());
+
+        setHasStableIds(true);
+    }
+
+    public void set(@NonNull List<EntityCertificate> certificates) {
+        Log.i("Set certificates=" + certificates.size());
+
+        DiffUtil.DiffResult diff = DiffUtil.calculateDiff(new DiffCallback(items, certificates), false);
+
+        items = certificates;
+
+        diff.dispatchUpdatesTo(new ListUpdateCallback() {
+            @Override
+            public void onInserted(int position, int count) {
+                Log.i("Inserted @" + position + " #" + count);
+            }
+
+            @Override
+            public void onRemoved(int position, int count) {
+                Log.i("Removed @" + position + " #" + count);
+            }
+
+            @Override
+            public void onMoved(int fromPosition, int toPosition) {
+                Log.i("Moved " + fromPosition + ">" + toPosition);
+            }
+
+            @Override
+            public void onChanged(int position, int count, Object payload) {
+                Log.i("Changed @" + position + " #" + count);
+            }
+        });
+        diff.dispatchUpdatesTo(this);
+    }
+
+    private class DiffCallback extends DiffUtil.Callback {
+        private List<EntityCertificate> prev = new ArrayList<>();
+        private List<EntityCertificate> next = new ArrayList<>();
+
+        DiffCallback(List<EntityCertificate> prev, List<EntityCertificate> next) {
+            this.prev.addAll(prev);
+            this.next.addAll(next);
+        }
+
+        @Override
+        public int getOldListSize() {
+            return prev.size();
+        }
+
+        @Override
+        public int getNewListSize() {
+            return next.size();
+        }
+
+        @Override
+        public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
+            EntityCertificate c1 = prev.get(oldItemPosition);
+            EntityCertificate c2 = next.get(newItemPosition);
+            return c1.id.equals(c2.id);
+        }
+
+        @Override
+        public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
+            EntityCertificate c1 = prev.get(oldItemPosition);
+            EntityCertificate c2 = next.get(newItemPosition);
+            return c1.equals(c2);
+        }
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return items.get(position).id;
+    }
+
+    @Override
+    public int getItemCount() {
+        return items.size();
+    }
+
+    @Override
+    @NonNull
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        return new ViewHolder(inflater.inflate(R.layout.item_certificate, parent, false));
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
+        holder.unwire();
+
+        EntityCertificate certificate = items.get(position);
+        holder.bindTo(certificate);
+
+        holder.wire();
+    }
+
+    interface ICertificate {
+        void onSelected(EntityCertificate certificate);
+    }
+}