Implement proper settings restrictions

Settings restrictions for limited users translate to user
restrictions specified in UserManager. Added required strings.
TODO: Add NFC restriction.

Change-Id: If1f81319131855f5dc1b27fe5bd54a4fef616d7f

src/com/android/settings/users/RestrictionUtils.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.users;
+
+import android.content.Context;
+import android.content.RestrictionEntry;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.provider.Settings.Secure;
+
+import com.android.settings.R;
+
+import java.util.ArrayList;
+
+public class RestrictionUtils {
+
+    public static final String [] sRestrictionKeys = {
+        UserManager.DISALLOW_CONFIG_WIFI,
+        UserManager.DISALLOW_CONFIG_BLUETOOTH,
+        UserManager.DISALLOW_SHARE_LOCATION,
+        UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES
+    };
+
+    public static final int [] sRestrictionTitles = {
+        R.string.restriction_wifi_config_title,
+        R.string.restriction_bluetooth_config_title,
+        R.string.restriction_location_enable_title,
+        R.string.install_applications
+    };
+
+    public static final int [] sRestrictionDescriptions = {
+        R.string.restriction_wifi_config_summary,
+        R.string.restriction_bluetooth_config_summary,
+        R.string.restriction_location_enable_summary,
+        R.string.install_unknown_applications
+    };
+
+    /**
+     * Returns the current user restrictions in the form of application
+     * restriction entries.
+     * @return list of RestrictionEntry objects with user-visible text.
+     */
+    public static ArrayList<RestrictionEntry> getRestrictions(Context context, UserHandle user) {
+        Resources res = context.getResources();
+        ArrayList<RestrictionEntry> entries = new ArrayList<RestrictionEntry>();
+        UserManager um = UserManager.get(context);
+        Bundle userRestrictions = um.getUserRestrictions(user);
+
+        for (int i = 0; i < sRestrictionKeys.length; i++) {
+            RestrictionEntry entry = new RestrictionEntry(
+                    sRestrictionKeys[i],
+                    !userRestrictions.getBoolean(sRestrictionKeys[i], false));
+            entry.setTitle(res.getString(sRestrictionTitles[i]));
+            entry.setDescription(res.getString(sRestrictionDescriptions[i]));
+            entry.setType(RestrictionEntry.TYPE_BOOLEAN);
+            entries.add(entry);
+        }
+
+        return entries;
+    }
+
+    public static void setRestrictions(Context context, ArrayList<RestrictionEntry> entries,
+            UserHandle user) {
+        UserManager um = UserManager.get(context);
+        Bundle userRestrictions = um.getUserRestrictions(user);
+
+        for (RestrictionEntry entry : entries) {
+            userRestrictions.putBoolean(entry.getKey(), !entry.getSelectedState());
+            if (entry.getKey().equals(UserManager.DISALLOW_SHARE_LOCATION)
+                    && !entry.getSelectedState()) {
+                Secure.putStringForUser(context.getContentResolver(),
+                        Secure.LOCATION_PROVIDERS_ALLOWED, "", user.getIdentifier());
+            }
+        }
+        um.setUserRestrictions(userRestrictions, user);
+    }
+}