Email deletion

TODO

@@ -1,5 +1,5 @@
 - Email selection
--- Deleting emails
+-- Show which have been selected (background? image?)
 -- Mark as read
 - Send button action
 - Deleting identities

res/layout/listitem_folder.xml

@@ -2,7 +2,7 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@drawable/activated_background" >
+    android:background="@drawable/folder_activated_background" >
     <TextView
         android:id="@+id/folder_name"
         android:layout_width="wrap_content"

res/menu/email_list_context.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:i2pandroid="http://schemas.android.com/apk/res-auto" >
+
+    <item
+        android:id="@+id/action_delete_emails"
+        android:icon="@drawable/ic_content_discard"
+        android:title="@string/action_delete_emails"
+        i2pandroid:showAsAction="ifRoom"/>
+
+</menu>

res/values/strings.xml

@@ -6,6 +6,9 @@
     <string name="action_send_email">Send email</string>
     <string name="action_settings">Settings</string>
 
+    <string name="items_selected">%s selected</string>
+    <string name="action_delete_emails">Delete selected emails</string>
+
     <string name="drawer_open">Open nav</string>
     <string name="drawer_close">Close nav</string>
 

src/i2p/bote/EmailListAdapter.java

@@ -13,6 +13,7 @@ import i2p.bote.util.BoteHelper;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Typeface;
+import android.util.SparseBooleanArray;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -22,10 +23,12 @@ import android.widget.TextView;
 
 public class EmailListAdapter extends ArrayAdapter<Email> {
     private final LayoutInflater mInflater;
+    private SparseBooleanArray mSelectedEmails;
 
     public EmailListAdapter(Context context) {
         super(context, android.R.layout.simple_list_item_2);
         mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        mSelectedEmails = new SparseBooleanArray();
     }
 
     public void setData(List<Email> emails) {
@@ -78,4 +81,29 @@ public class EmailListAdapter extends ArrayAdapter<Email> {
 
         return v;
     }
+
+    public void toggleSelection(int position) {
+        selectView(position, !mSelectedEmails.get(position));
+    }
+
+    public void removeSelection() {
+        mSelectedEmails = new SparseBooleanArray();
+        notifyDataSetChanged();
+    }
+
+    public void selectView(int position, boolean value) {
+        if (value)
+            mSelectedEmails.put(position, value);
+        else
+            mSelectedEmails.delete(position);
+        notifyDataSetChanged();
+    }
+
+    public int getSelectedCount() {
+        return mSelectedEmails.size();
+    }
+
+    public SparseBooleanArray getSelectedIds() {
+        return mSelectedEmails;
+    }
 }

src/i2p/bote/EmailListFragment.java

@@ -24,12 +24,16 @@ import android.os.Bundle;
 import android.support.v4.app.ListFragment;
 import android.support.v4.app.LoaderManager;
 import android.support.v4.content.Loader;
+import android.support.v7.app.ActionBarActivity;
+import android.support.v7.view.ActionMode;
+import android.util.SparseBooleanArray;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
+import android.widget.AdapterView;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.TextView;
@@ -44,6 +48,7 @@ public class EmailListFragment extends ListFragment implements
 
     private EmailListAdapter mAdapter;
     private EmailFolder mFolder;
+    private ActionMode mMode;
 
     private EditText mPasswordInput;
     private TextView mPasswordError;
@@ -90,6 +95,17 @@ public class EmailListFragment extends ListFragment implements
 
         setListAdapter(mAdapter);
 
+        // Set up CAB
+        mMode = null;
+        getListView().setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
+            @Override
+            public boolean onItemLongClick(AdapterView<?> parent, View view,
+                    int position, long id) {
+                onListItemSelect(position);
+                return true;
+            }
+        });
+
         if (mFolder == null) {
             setEmptyText(getResources().getString(
                     R.string.folder_does_not_exist));
@@ -216,8 +232,73 @@ public class EmailListFragment extends ListFragment implements
     @Override
     public void onListItemClick(ListView parent, View view, int pos, long id) {
         super.onListItemClick(parent, view, pos, id);
-        mCallback.onEmailSelected(
-                mFolder.getName(), mAdapter.getItem(pos).getMessageID());
+        if (mMode == null) {
+            mCallback.onEmailSelected(
+                    mFolder.getName(), mAdapter.getItem(pos).getMessageID());
+        } else
+            onListItemSelect(pos);
+    }
+
+    private void onListItemSelect(int position) {
+        mAdapter.toggleSelection(position);
+        boolean hasCheckedElement = mAdapter.getSelectedCount() > 0;
+
+        if (hasCheckedElement && mMode == null) {
+            mMode = ((ActionBarActivity) getActivity()).startSupportActionMode(new ModeCallback());
+        } else if (!hasCheckedElement && mMode != null) {
+            mMode.finish();
+        }
+
+        if (mMode != null)
+            mMode.setTitle(getResources().getString(
+                    R.string.items_selected, mAdapter.getSelectedCount()));
+    }
+
+    private final class ModeCallback implements ActionMode.Callback {
+        @Override
+        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+            // Respond to clicks on the actions in the CAB
+            switch (item.getItemId()) {
+            case R.id.action_delete_emails:
+                SparseBooleanArray selected = mAdapter.getSelectedIds();
+                for (int i = (selected.size() - 1); i >= 0; i--) {
+                    if (selected.valueAt(i)) {
+                        Email email = mAdapter.getItem(selected.keyAt(i));
+                        // The Loader will update mAdapter
+                        I2PBote.getInstance().deleteEmail(mFolder, email.getMessageID());
+                    }
+                }
+                mode.finish();
+                return true;
+            default:
+                return false;
+            }
+        }
+
+        @Override
+        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+            // Inflate the menu for the CAB
+            MenuInflater inflater = mode.getMenuInflater();
+            inflater.inflate(R.menu.email_list_context, menu);
+            return true;
+        }
+
+        @Override
+        public void onDestroyActionMode(ActionMode mode) {
+            // Here you can make any necessary updates to the activity when
+            // the CAB is removed.
+            mAdapter.removeSelection();
+
+            if (mode == mMode)
+                mMode = null;
+        }
+
+        @Override
+        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+            // Here you can perform updates to the CAB due to
+            // an invalidate() request
+            return false;
+        }
     }
 
     // LoaderManager.LoaderCallbacks<List<Email>>