multi selection for secret key list

OpenPGP-Keychain/res/values/strings.xml

@@ -364,7 +364,7 @@
     <string name="key_list_empty_text2">You can start by</string>
     <string name="key_list_empty_text3">or</string>
     <string name="key_list_empty_button_create">creating your own key pair</string>
-    <string name="key_list_empty_button_import">importing public keys.</string>
+    <string name="key_list_empty_button_import">importing keys.</string>
 
     <!-- Key view -->
     <string name="key_view_action_encrypt">Encrypt to this contact</string>

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/KeyListSecretFragment.java

@@ -17,22 +17,32 @@
 
 package org.sufficientlysecure.keychain.ui;
 
+import java.util.Set;
+
 import org.sufficientlysecure.keychain.Id;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
 import org.sufficientlysecure.keychain.provider.KeychainContract.UserIds;
 import org.sufficientlysecure.keychain.ui.adapter.KeyListSecretAdapter;
+import org.sufficientlysecure.keychain.ui.dialog.DeleteKeyDialogFragment;
 
+import android.annotation.SuppressLint;
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.support.v4.app.LoaderManager;
 import android.support.v4.content.CursorLoader;
 import android.support.v4.content.Loader;
+import android.view.ActionMode;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
+import android.widget.ListView;
+import android.widget.AbsListView.MultiChoiceModeListener;
 import android.widget.AdapterView.OnItemClickListener;
 
 import com.actionbarsherlock.app.SherlockListFragment;
@@ -47,6 +57,7 @@ public class KeyListSecretFragment extends SherlockListFragment implements
     /**
      * Define Adapter and Loader on create of Activity
      */
+    @SuppressLint("NewApi")
     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
@@ -59,6 +70,75 @@ public class KeyListSecretFragment extends SherlockListFragment implements
         // application this would come from a resource.
         setEmptyText(getString(R.string.list_empty));
 
+        /*
+         * ActionBarSherlock does not support MultiChoiceModeListener. Thus multi-selection is only
+         * available for Android >= 3.0
+         */
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
+            getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
+            getListView().setMultiChoiceModeListener(new MultiChoiceModeListener() {
+
+                private int count = 0;
+
+                @Override
+                public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+                    android.view.MenuInflater inflater = getActivity().getMenuInflater();
+                    inflater.inflate(R.menu.key_list_secret_multi, menu);
+                    return true;
+                }
+
+                @Override
+                public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+                    return false;
+                }
+
+                @Override
+                public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+                    Set<Integer> positions = mAdapter.getCurrentCheckedPosition();
+
+                    // get IDs for checked positions as long array
+                    long[] ids = new long[positions.size()];
+                    int i = 0;
+                    for (int pos : positions) {
+                        ids[i] = mAdapter.getItemId(pos);
+                        i++;
+                    }
+
+                    switch (item.getItemId()) {
+                    case R.id.menu_key_list_public_multi_delete: {
+                        showDeleteKeyDialog(ids);
+
+                        break;
+                    }
+                    }
+                    return false;
+                }
+
+                @Override
+                public void onDestroyActionMode(ActionMode mode) {
+                    count = 0;
+                    mAdapter.clearSelection();
+                }
+
+                @Override
+                public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
+                        boolean checked) {
+                    if (checked) {
+                        count++;
+                        mAdapter.setNewSelection(position, checked);
+                    } else {
+                        count--;
+                        mAdapter.removeSelection(position);
+                    }
+
+                    String keysSelected = getResources().getQuantityString(
+                            R.plurals.key_list_selected_keys, count, count);
+                    mode.setTitle(keysSelected);
+                }
+
+            });
+        }
+
         // We have a menu item to show in action bar.
         setHasOptionsMenu(true);
 
@@ -123,4 +203,16 @@ public class KeyListSecretFragment extends SherlockListFragment implements
         editIntent.setAction(EditKeyActivity.ACTION_EDIT_KEY);
         startActivityForResult(editIntent, 0);
     }
+
+    /**
+     * Show dialog to delete key
+     * 
+     * @param keyRingRowIds
+     */
+    public void showDeleteKeyDialog(long[] keyRingRowIds) {
+        DeleteKeyDialogFragment deleteKeyDialog = DeleteKeyDialogFragment.newInstance(null,
+                keyRingRowIds, Id.type.secret_key);
+
+        deleteKeyDialog.show(getActivity().getSupportFragmentManager(), "deleteKeyDialog");
+    }
 }

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/adapter/KeyListSecretAdapter.java

@@ -17,12 +17,17 @@
 
 package org.sufficientlysecure.keychain.ui.adapter;
 
+import java.util.HashMap;
+import java.util.Set;
+
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.helper.OtherHelper;
 import org.sufficientlysecure.keychain.provider.KeychainContract.UserIds;
 
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.database.Cursor;
+import android.graphics.Color;
 import android.support.v4.widget.CursorAdapter;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -30,9 +35,11 @@ import android.view.ViewGroup;
 import android.widget.TextView;
 
 public class KeyListSecretAdapter extends CursorAdapter {
-
     private LayoutInflater mInflater;
 
+    @SuppressLint("UseSparseArrays")
+    private HashMap<Integer, Boolean> mSelection = new HashMap<Integer, Boolean>();
+
     public KeyListSecretAdapter(Context context, Cursor c, int flags) {
         super(context, c, flags);
 
@@ -74,4 +81,46 @@ public class KeyListSecretAdapter extends CursorAdapter {
         return mInflater.inflate(R.layout.key_list_item, null);
     }
 
+    /** -------------------------- MULTI-SELECTION METHODS -------------- */
+    public void setNewSelection(int position, boolean value) {
+        mSelection.put(position, value);
+        notifyDataSetChanged();
+    }
+
+    public boolean isPositionChecked(int position) {
+        Boolean result = mSelection.get(position);
+        return result == null ? false : result;
+    }
+
+    public Set<Integer> getCurrentCheckedPosition() {
+        return mSelection.keySet();
+    }
+
+    public void removeSelection(int position) {
+        mSelection.remove(position);
+        notifyDataSetChanged();
+    }
+
+    public void clearSelection() {
+        mSelection.clear();
+        notifyDataSetChanged();
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        // let the adapter handle setting up the row views
+        View v = super.getView(position, convertView, parent);
+
+        /**
+         * Change color for multi-selection
+         */
+        // default color
+        v.setBackgroundColor(Color.TRANSPARENT);
+        if (mSelection.get(position) != null) {
+            // this is a selected position, change color!
+            v.setBackgroundColor(parent.getResources().getColor(R.color.emphasis));
+        }
+        return v;
+    }
+
 }