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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package com.android.settings.enterprise;
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import android.content.Context;
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import androidx.preference.Preference;
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import com.android.settings.R;
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import com.android.settings.applications.ApplicationFeatureProvider;
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import com.android.settings.core.PreferenceControllerMixin;
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import com.android.settings.overlay.FeatureFactory;
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import com.android.settingslib.core.AbstractPreferenceController;
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public abstract class AdminGrantedPermissionsPreferenceControllerBase
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extends AbstractPreferenceController implements PreferenceControllerMixin {
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private final String[] mPermissions;
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private final ApplicationFeatureProvider mFeatureProvider;
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private final boolean mAsync;
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private boolean mHasApps;
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public AdminGrantedPermissionsPreferenceControllerBase(Context context, boolean async,
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String[] permissions) {
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super(context);
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mPermissions = permissions;
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mFeatureProvider = FeatureFactory.getFactory(context)
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.getApplicationFeatureProvider(context);
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mAsync = async;
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mHasApps = false;
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}
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@Override
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public void updateState(Preference preference) {
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mFeatureProvider.calculateNumberOfAppsWithAdminGrantedPermissions(mPermissions,
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true /* async */,
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(num) -> {
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if (num == 0) {
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mHasApps = false;
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} else {
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preference.setSummary(mContext.getResources().getQuantityString(
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R.plurals.enterprise_privacy_number_packages_lower_bound,
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num, num));
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mHasApps = true;
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}
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preference.setVisible(mHasApps);
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});
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}
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@Override
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public boolean isAvailable() {
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if (mAsync) {
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// When called on the main UI thread, we must not block. Since calculating the number of
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// apps that the admin has granted a given permissions takes a bit of time, we always
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// return true here and determine the pref's actual visibility asynchronously in
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// updateState().
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return true;
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}
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// When called by the search indexer, we are on a background thread that we can block. Also,
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// changes to the pref's visibility made in updateState() would not be seen by the indexer.
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// We block and return synchronously whether the admin has granted the given permissions to
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// any apps or not.
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final Boolean[] haveAppsWithAdminGrantedPermissions = { null };
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mFeatureProvider.calculateNumberOfAppsWithAdminGrantedPermissions(mPermissions,
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false /* async */, (num) -> haveAppsWithAdminGrantedPermissions[0] = num > 0);
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mHasApps = haveAppsWithAdminGrantedPermissions[0];
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return mHasApps;
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}
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@Override
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public boolean handlePreferenceTreeClick(Preference preference) {
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if (!getPreferenceKey().equals(preference.getKey())) {
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return false;
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}
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if (!mHasApps) {
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return false;
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}
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return super.handlePreferenceTreeClick(preference);
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}
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}
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