1 /*
2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.permissioncontroller.role.ui;
18 
19 import android.content.Intent;
20 
21 import androidx.annotation.NonNull;
22 import androidx.annotation.Nullable;
23 import androidx.preference.Preference;
24 import androidx.preference.PreferenceViewHolder;
25 
26 /**
27  * Mixin for implementing {@link RestrictionAwarePreference}.
28  */
29 public class RestrictionAwarePreferenceMixin {
30 
31     private static final String LOG_TAG = RestrictionAwarePreferenceMixin.class.getSimpleName();
32 
33     @NonNull
34     private final Preference mPreference;
35 
36     @Nullable
37     private Intent mRestrictionIntent;
38 
RestrictionAwarePreferenceMixin(@onNull Preference preference)39     public RestrictionAwarePreferenceMixin(@NonNull Preference preference) {
40         mPreference = preference;
41     }
42 
43     /**
44      * Implementation for {@link RestrictionAwarePreference#setRestrictionIntent}.
45      */
setRestrictionIntent(@ullable Intent restrictionIntent)46     public void setRestrictionIntent(@Nullable Intent restrictionIntent) {
47         mRestrictionIntent = restrictionIntent;
48         mPreference.setEnabled(mRestrictionIntent == null);
49     }
50 
51     /**
52      * Call after {@link Preference#onBindViewHolder} to apply blocking effects.
53      */
onAfterBindViewHolder(@onNull PreferenceViewHolder holder)54     public void onAfterBindViewHolder(@NonNull PreferenceViewHolder holder) {
55         if (mRestrictionIntent != null) {
56             // We set the item view to enabled to make the preference row clickable.
57             // Normal disabled preferences have the whole view hierarchy disabled, so by making only
58             // the top-level itemView enabled, we don't change the fact that the whole preference
59             // still "looks" disabled (see Preference.onBindViewHolder).
60             // Preference.onBindViewHolder sets the onClickListener as well on each preference, so
61             // we don't need to unset the listener here (we wouldn't know the correct one anyway).
62             // This approach is used already by com.android.settingslib.RestrictedPreferenceHelper.
63             holder.itemView.setEnabled(true);
64             holder.itemView.setOnClickListener(
65                     view -> view.getContext().startActivity(mRestrictionIntent));
66         }
67     }
68 }
69