From f4c0ee607e909caaacf52367901652ea89b16581 Mon Sep 17 00:00:00 2001
From: Matthew Wong <wongma@protonmail.ch>
Date: Tue, 11 Aug 2015 19:56:32 -0400
Subject: Multi-select deletion of apps in settings page

---
 .../autofill/AutofillPreferenceActivity.java       |  2 -
 .../pwdstore/autofill/AutofillRecyclerAdapter.java | 92 +++++++++++++++++++++-
 .../main/res/drawable/autofill_row_background.xml  |  5 ++
 app/src/main/res/layout/autofill_row_layout.xml    |  2 +-
 4 files changed, 96 insertions(+), 5 deletions(-)
 create mode 100644 app/src/main/res/drawable/autofill_row_background.xml

diff --git a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.java b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.java
index 10684f45..54f0ade4 100644
--- a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.java
+++ b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillPreferenceActivity.java
@@ -8,7 +8,6 @@ import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.database.MatrixCursor;
 import android.os.Bundle;
-import android.preference.PreferenceManager;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
@@ -149,7 +148,6 @@ public class AutofillPreferenceActivity extends AppCompatActivity {
         args.putInt("position", recyclerAdapter.getPosition(packageName));
         df.setArguments(args);
         df.show(getFragmentManager(), "autofill_dialog");
-
         // TODO if called from dialog 'Settings' button, should activity finish at OK?
     }
 }
diff --git a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.java b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.java
index bd2835e5..14530879 100644
--- a/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.java
+++ b/app/src/main/java/com/zeapo/pwdstore/autofill/AutofillRecyclerAdapter.java
@@ -5,8 +5,11 @@ import android.content.SharedPreferences;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.preference.PreferenceManager;
+import android.support.v7.view.ActionMode;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
@@ -15,13 +18,19 @@ import android.widget.TextView;
 import com.zeapo.pwdstore.R;
 
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.TreeSet;
 
 public class AutofillRecyclerAdapter extends RecyclerView.Adapter<AutofillRecyclerAdapter.ViewHolder> {
     private ArrayList<ApplicationInfo> apps;
     private PackageManager pm;
     private AutofillPreferenceActivity activity;
+    private final Set<Integer> selectedItems;
+    private ActionMode actionMode;
 
-    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
+    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
         public View view;
         public TextView name;
         public TextView secondary;
@@ -35,11 +44,30 @@ public class AutofillRecyclerAdapter extends RecyclerView.Adapter<AutofillRecycl
             secondary = (TextView) view.findViewById(R.id.secondary_text);
             icon = (ImageView) view.findViewById(R.id.app_icon);
             view.setOnClickListener(this);
+            view.setOnLongClickListener(this);
         }
 
         @Override
         public void onClick(View v) {
-            activity.showDialog(packageName, name.getText().toString());
+            if (actionMode != null) {
+                toggleSelection(getAdapterPosition(), view);
+                if (selectedItems.isEmpty()) {
+                    actionMode.finish();
+                }
+            } else {
+                activity.showDialog(packageName, name.getText().toString());
+            }
+        }
+
+        @Override
+        public boolean onLongClick(View v) {
+            if (actionMode != null) {
+                return false;
+            }
+            toggleSelection(getAdapterPosition(), view);
+            // Start the CAB using the ActionMode.Callback
+            actionMode = activity.startSupportActionMode(actionModeCallback);
+            return true;
         }
     }
 
@@ -47,6 +75,7 @@ public class AutofillRecyclerAdapter extends RecyclerView.Adapter<AutofillRecycl
         this.apps = apps;
         this.pm = pm;
         this.activity = activity;
+        this.selectedItems = new TreeSet<>(Collections.reverseOrder());
     }
 
     @Override
@@ -80,6 +109,8 @@ public class AutofillRecyclerAdapter extends RecyclerView.Adapter<AutofillRecycl
         }
         holder.icon.setImageDrawable(pm.getApplicationIcon(app));
         holder.packageName = app.packageName;
+
+        holder.view.setSelected(selectedItems.contains(position));
     }
 
     @Override
@@ -105,4 +136,61 @@ public class AutofillRecyclerAdapter extends RecyclerView.Adapter<AutofillRecycl
         }
         return -1;
     }
+
+    private ActionMode.Callback actionModeCallback = new ActionMode.Callback() {
+        @Override
+        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+            mode.getMenuInflater().inflate(R.menu.context_pass, menu);
+            return true;
+        }
+
+        @Override
+        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+            return false;
+        }
+
+        @Override
+        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+            switch (item.getItemId()) {
+                case R.id.menu_delete_password:
+                    // don't ask for confirmation
+                    for (int position : selectedItems) {
+                        remove(position);
+                    }
+                    mode.finish(); // Action picked, so close the CAB
+                    return true;
+                default:
+                    return false;
+            }
+        }
+
+        @Override
+        public void onDestroyActionMode(ActionMode mode) {
+            for (Iterator it = selectedItems.iterator(); it.hasNext();) {
+                // need the setSelected line in onBind
+                notifyItemChanged((Integer) it.next());
+                it.remove();
+            }
+            actionMode = null;
+        }
+    };
+
+    public void remove(int position) {
+        ApplicationInfo applicationInfo = this.apps.get(position);
+        SharedPreferences prefs
+                = activity.getApplicationContext().getSharedPreferences("autofill", Context.MODE_PRIVATE);
+        prefs.edit().remove(applicationInfo.packageName).apply();
+
+        this.apps.remove(position);
+        this.notifyItemRemoved(position);
+    }
+
+    public void toggleSelection(int position, View view) {
+        if (!selectedItems.remove(position)) {
+            selectedItems.add(position);
+            view.setSelected(true);
+        } else {
+            view.setSelected(false);
+        }
+    }
 }
diff --git a/app/src/main/res/drawable/autofill_row_background.xml b/app/src/main/res/drawable/autofill_row_background.xml
new file mode 100644
index 00000000..05e887ca
--- /dev/null
+++ b/app/src/main/res/drawable/autofill_row_background.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true" android:drawable="@color/blue_grey_200" />
+    <item android:drawable="@color/grey_white_1000" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/layout/autofill_row_layout.xml b/app/src/main/res/layout/autofill_row_layout.xml
index 3f94a8ad..354f9181 100644
--- a/app/src/main/res/layout/autofill_row_layout.xml
+++ b/app/src/main/res/layout/autofill_row_layout.xml
@@ -3,7 +3,7 @@
               android:orientation="vertical"
               android:layout_width="match_parent"
               android:layout_height="64dp"
-              android:background="@color/grey_white_1000">
+              android:background="@drawable/autofill_row_background">
 
     <LinearLayout
         android:layout_width="match_parent"
-- 
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