1/*
2 * Copyright (C) 2017 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
17package com.android.tv.settings.accessibility;
18
19import android.accessibilityservice.AccessibilityServiceInfo;
20import android.app.Fragment;
21import android.content.ComponentName;
22import android.content.Context;
23import android.content.pm.PackageManager;
24import android.os.Bundle;
25import android.provider.Settings;
26import android.support.annotation.Keep;
27import android.support.v17.preference.LeanbackPreferenceFragment;
28import android.support.v17.preference.LeanbackSettingsFragment;
29import android.support.v7.preference.Preference;
30import android.support.v7.preference.PreferenceScreen;
31import android.text.TextUtils;
32import android.view.accessibility.AccessibilityManager;
33
34import com.android.tv.settings.R;
35import com.android.tv.settings.RadioPreference;
36
37import java.util.List;
38
39/**
40 * Fragment imitating a single-selection list for picking the accessibility shortcut service
41 */
42@Keep
43public class AccessibilityShortcutServiceFragment extends LeanbackPreferenceFragment implements
44        AccessibilityServiceConfirmationFragment.OnAccessibilityServiceConfirmedListener {
45    private static final String SERVICE_RADIO_GROUP = "service_group";
46
47    private final Preference.OnPreferenceChangeListener mPreferenceChangeListener =
48            (preference, newValue) -> {
49                final String newCompString = preference.getKey();
50                final String currentService =
51                        AccessibilityShortcutFragment.getCurrentService(getContext());
52                if ((Boolean) newValue && !TextUtils.equals(newCompString, currentService)) {
53                    final ComponentName cn = ComponentName.unflattenFromString(newCompString);
54                    final CharSequence label = preference.getTitle();
55                    final Fragment confirmFragment =
56                            AccessibilityServiceConfirmationFragment.newInstance(cn, label, true);
57                    confirmFragment.setTargetFragment(AccessibilityShortcutServiceFragment.this, 0);
58
59                    final Fragment settingsFragment = getCallbackFragment();
60                    if (settingsFragment instanceof LeanbackSettingsFragment) {
61                        ((LeanbackSettingsFragment) settingsFragment)
62                                .startImmersiveFragment(confirmFragment);
63                    } else {
64                        throw new IllegalStateException("Not attached to settings fragment??");
65                    }
66                }
67                return false;
68            };
69
70    @Override
71    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
72        setPreferencesFromResource(R.xml.accessibility_shortcut_service, null);
73
74        final PreferenceScreen screen = getPreferenceScreen();
75        final Context themedContext = getPreferenceManager().getContext();
76
77        final List<AccessibilityServiceInfo> installedServices = getContext()
78                .getSystemService(AccessibilityManager.class)
79                .getInstalledAccessibilityServiceList();
80        final PackageManager packageManager = getContext().getPackageManager();
81        final String currentService = AccessibilityShortcutFragment.getCurrentService(getContext());
82        for (AccessibilityServiceInfo service : installedServices) {
83            final RadioPreference preference = new RadioPreference(themedContext);
84            preference.setPersistent(false);
85            preference.setRadioGroup(SERVICE_RADIO_GROUP);
86            preference.setOnPreferenceChangeListener(mPreferenceChangeListener);
87
88            final String serviceString = service.getComponentName().flattenToString();
89            if (TextUtils.equals(currentService, serviceString)) {
90                preference.setChecked(true);
91            }
92            preference.setKey(serviceString);
93            preference.setTitle(service.getResolveInfo().loadLabel(packageManager));
94
95            screen.addPreference(preference);
96        }
97    }
98
99    @Override
100    public void onAccessibilityServiceConfirmed(ComponentName componentName, boolean enabling) {
101        final String componentString = componentName.flattenToString();
102        Settings.Secure.putString(getContext().getContentResolver(),
103                Settings.Secure.ACCESSIBILITY_SHORTCUT_TARGET_SERVICE,
104                componentString);
105        getFragmentManager().popBackStack();
106    }
107}
108