Allow adding widgets from user profiles.

The goal of this change is to enable support for appwidget from
user profiles to the user main profile. A user profile is a user
which is associated as a child of the main user profile. For example,
a user may have a personal (parent) and corporate (child) profile.
The device policy should be able to control whether adding a widget
from a child profile and given packages is allowed. This change
assumes that all packages from managed profiles are white listed.
Another change will add the device policy changes.

Change-Id: I267260b55d74c48b112a29979a9f59eef7a8194e

3 files changed, 124 insertions, 3 deletions

diff --git a/core/java/android/app/admin/DevicePolicyManager.java b/core/java/android/app/admin/DevicePolicyManager.java
index e28f00c..ca6b1e8 100644
--- a/core/java/android/app/admin/DevicePolicyManager.java
+++ b/core/java/android/app/admin/DevicePolicyManager.java
@@ -20,6 +20,7 @@ import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.app.Activity;
+import android.app.admin.IDevicePolicyManager;
 import android.content.AbstractRestrictionsProvider;
 import android.content.ComponentName;
 import android.content.Context;
@@ -28,8 +29,6 @@ import android.content.IntentFilter;
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
-import android.content.RestrictionsManager;
-import android.media.AudioService;
 import android.net.ProxyInfo;
 import android.os.Bundle;
 import android.os.Handler;
@@ -40,7 +39,6 @@ import android.os.ServiceManager;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
-import android.service.trust.TrustAgentService;
 import android.util.Log;
 
 import com.android.org.conscrypt.TrustedCertificateStore;
@@ -55,6 +53,7 @@ import java.security.cert.CertificateException;
 import java.security.cert.CertificateFactory;
 import java.security.cert.X509Certificate;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 
@@ -3079,4 +3078,85 @@ public class DevicePolicyManager {
         }
         return false;
     }
+
+    /**
+     * Called by the profile owner to enable widget providers from a given package
+     * to be available in the parent profile. As a result the user will be able to
+     * add widgets from the white-listed package running under the profile to a widget
+     * host which runs under the device owner, for example the home screen. Note that
+     * a package may have zero or more provider components, where each component
+     * provides a different widget type.
+     * <p>
+     * <strong>Note:</strong> By default no widget provider package is white-listed.
+     * </p>
+     *
+     * @param admin Which {@link DeviceAdminReceiver} this request is associated with.
+     * @param packageName The package from which widget providers are white-listed.
+     * @return Whether the package was added.
+     *
+     * @see #removeCrossProfileWidgetProvider(android.content.ComponentName, String)
+     * @see #getCrossProfileWidgetProviders(android.content.ComponentName)
+     */
+    public boolean addCrossProfileWidgetProvider(ComponentName admin, String packageName) {
+        if (mService != null) {
+            try {
+                return mService.addCrossProfileWidgetProvider(admin, packageName);
+            } catch (RemoteException re) {
+                Log.w(TAG, "Error calling addCrossProfileWidgetProvider", re);
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Called by the profile owner to disable widget providers from a given package
+     * to be available in the parent profile. For this method to take effect the
+     * package should have been added via {@link #addCrossProfileWidgetProvider(
+     * android.content.ComponentName, String)}.
+     * <p>
+     * <strong>Note:</strong> By default no widget provider package is white-listed.
+     * </p>
+     *
+     * @param admin Which {@link DeviceAdminReceiver} this request is associated with.
+     * @param packageName The package from which widget providers are no longer
+     *     white-listed.
+     * @return Whether the package was removed.
+     *
+     * @see #addCrossProfileWidgetProvider(android.content.ComponentName, String)
+     * @see #getCrossProfileWidgetProviders(android.content.ComponentName)
+     */
+    public boolean removeCrossProfileWidgetProvider(ComponentName admin, String packageName) {
+        if (mService != null) {
+            try {
+                return mService.removeCrossProfileWidgetProvider(admin, packageName);
+            } catch (RemoteException re) {
+                Log.w(TAG, "Error calling removeCrossProfileWidgetProvider", re);
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Called by the profile owner to query providers from which packages are
+     * available in the parent profile.
+     *
+     * @param admin Which {@link DeviceAdminReceiver} this request is associated with.
+     * @return The white-listed package list.
+     *
+     * @see #addCrossProfileWidgetProvider(android.content.ComponentName, String)
+     * @see #removeCrossProfileWidgetProvider(android.content.ComponentName, String)
+     */
+    public List<String> getCrossProfileWidgetProviders(ComponentName admin) {
+        if (mService != null) {
+            try {
+                List<String> providers = mService.getCrossProfileWidgetProviders(admin);
+                if (providers != null) {
+                    return providers;
+                }
+            } catch (RemoteException re) {
+                Log.w(TAG, "Error calling getCrossProfileWidgetProviders", re);
+            }
+        }
+        return Collections.emptyList();
+    }
 }
diff --git a/core/java/android/app/admin/DevicePolicyManagerInternal.java b/core/java/android/app/admin/DevicePolicyManagerInternal.java
new file mode 100644
index 0000000..edd8199
--- /dev/null
+++ b/core/java/android/app/admin/DevicePolicyManagerInternal.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2014 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 android.app.admin;
+
+import java.util.List;
+
+/**
+ * Device policy manager local system service interface.
+ *
+ * @hide Only for use within the system server.
+ */
+public abstract class DevicePolicyManagerInternal {
+
+    /**
+     * Gets the packages whose widget providers are white-listed to be
+     * available in the parent user.
+     *
+     * @param profileId The profile id.
+     * @return The list of packages if such or empty list if there are
+     *    no white-listed packages or the profile id is not a managed
+     *    profile.
+     */
+    public abstract List<String> getCrossProfileWidgetProviders(int profileId);
+}
diff --git a/core/java/android/app/admin/IDevicePolicyManager.aidl b/core/java/android/app/admin/IDevicePolicyManager.aidl
index 6ce737a..8954c0d 100644
--- a/core/java/android/app/admin/IDevicePolicyManager.aidl
+++ b/core/java/android/app/admin/IDevicePolicyManager.aidl
@@ -175,4 +175,7 @@ interface IDevicePolicyManager {
     void setTrustAgentFeaturesEnabled(in ComponentName admin, in ComponentName agent, in List<String> features, int userId);
     List<String> getTrustAgentFeaturesEnabled(in ComponentName admin, in ComponentName agent, int userId);
 
+    boolean addCrossProfileWidgetProvider(in ComponentName admin, String packageName);
+    boolean removeCrossProfileWidgetProvider(in ComponentName admin, String packageName);
+    List<String> getCrossProfileWidgetProviders(in ComponentName admin);
 }