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/*
* Copyright (C) 2017 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.enterprise;
import android.content.Context;
import android.support.v7.preference.Preference;
import com.android.settings.R;
import com.android.settings.applications.ApplicationFeatureProvider;
import com.android.settings.core.DynamicAvailabilityPreferenceController;
import com.android.settings.overlay.FeatureFactory;
import com.android.settingslib.core.lifecycle.Lifecycle;
public abstract class AdminGrantedPermissionsPreferenceControllerBase
extends DynamicAvailabilityPreferenceController {
private final String[] mPermissions;
private final String mPermissionGroup;
private final ApplicationFeatureProvider mFeatureProvider;
private final boolean mAsync;
private boolean mHasApps;
public AdminGrantedPermissionsPreferenceControllerBase(Context context, Lifecycle lifecycle,
boolean async, String[] permissions, String permissionGroup) {
super(context, lifecycle);
mPermissions = permissions;
mPermissionGroup = permissionGroup;
mFeatureProvider = FeatureFactory.getFactory(context)
.getApplicationFeatureProvider(context);
mAsync = async;
mHasApps = false;
}
@Override
public void updateState(Preference preference) {
mFeatureProvider.calculateNumberOfAppsWithAdminGrantedPermissions(mPermissions,
true /* async */,
(num) -> {
if (num == 0) {
mHasApps = false;
} else {
preference.setSummary(mContext.getResources().getQuantityString(
R.plurals.enterprise_privacy_number_packages_lower_bound,
num, num));
mHasApps = true;
}
preference.setVisible(mHasApps);
notifyOnAvailabilityUpdate(mHasApps);
});
}
@Override
public boolean isAvailable() {
if (mAsync) {
// When called on the main UI thread, we must not block. Since calculating the number of
// apps that the admin has granted a given permissions takes a bit of time, we always
// return true here and determine the pref's actual visibility asynchronously in
// updateState().
return true;
}
// When called by the search indexer, we are on a background thread that we can block. Also,
// changes to the pref's visibility made in updateState() would not be seen by the indexer.
// We block and return synchronously whether the admin has granted the given permissions to
// any apps or not.
final Boolean[] haveAppsWithAdminGrantedPermissions = { null };
mFeatureProvider.calculateNumberOfAppsWithAdminGrantedPermissions(mPermissions,
false /* async */, (num) -> haveAppsWithAdminGrantedPermissions[0] = num > 0);
mHasApps = haveAppsWithAdminGrantedPermissions[0];
notifyOnAvailabilityUpdate(mHasApps);
return mHasApps;
}
@Override
public boolean handlePreferenceTreeClick(Preference preference) {
if (!getPreferenceKey().equals(preference.getKey())) {
return false;
}
if (!mHasApps) {
return false;
}
return super.handlePreferenceTreeClick(preference);
}
}
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