1/*
2 * Copyright (C) 2015 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 */
16package com.android.systemui.tuner;
17
18import android.app.Fragment;
19import android.app.FragmentTransaction;
20import android.os.Bundle;
21import android.support.v14.preference.PreferenceFragment;
22import android.support.v7.preference.Preference;
23import android.support.v7.preference.PreferenceScreen;
24import android.util.Log;
25import android.view.MenuItem;
26
27import com.android.settingslib.drawer.SettingsDrawerActivity;
28import com.android.systemui.Dependency;
29import com.android.systemui.R;
30import com.android.systemui.fragments.FragmentService;
31
32public class TunerActivity extends SettingsDrawerActivity implements
33        PreferenceFragment.OnPreferenceStartFragmentCallback,
34        PreferenceFragment.OnPreferenceStartScreenCallback {
35
36    static final String ACTIVITY_ALIAS_NAME = "com.android.systemui.tuner.TunerSettingLink";
37
38    private static final String TAG_TUNER = "tuner";
39
40    protected void onCreate(Bundle savedInstanceState) {
41        super.onCreate(savedInstanceState);
42        Dependency.initDependencies(this);
43
44        if (getFragmentManager().findFragmentByTag(TAG_TUNER) == null) {
45            final String action = getIntent().getAction();
46            boolean showDemoMode = action != null && action.equals(
47                    "com.android.settings.action.DEMO_MODE");
48            final PreferenceFragment fragment = showDemoMode ? new DemoModeFragment()
49                    : new TunerFragment();
50            getFragmentManager().beginTransaction().replace(R.id.content_frame,
51                    fragment, TAG_TUNER).commit();
52        }
53    }
54
55    @Override
56    protected void onDestroy() {
57        super.onDestroy();
58        Dependency.destroy(FragmentService.class, s -> s.destroyAll());
59        Dependency.clearDependencies();
60    }
61
62    @Override
63    public boolean onMenuItemSelected(int featureId, MenuItem item) {
64        if (item.getItemId() == android.R.id.home) {
65            onBackPressed();
66            return true;
67        }
68        return super.onMenuItemSelected(featureId, item);
69    }
70
71    @Override
72    public void onBackPressed() {
73        if (!getFragmentManager().popBackStackImmediate()) {
74            super.onBackPressed();
75        }
76    }
77
78    @Override
79    public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
80        try {
81            Class<?> cls = Class.forName(pref.getFragment());
82            Fragment fragment = (Fragment) cls.newInstance();
83            final Bundle b = new Bundle(1);
84            b.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
85            fragment.setArguments(b);
86            FragmentTransaction transaction = getFragmentManager().beginTransaction();
87            setTitle(pref.getTitle());
88            transaction.replace(R.id.content_frame, fragment);
89            transaction.addToBackStack("PreferenceFragment");
90            transaction.commit();
91            return true;
92        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
93            Log.d("TunerActivity", "Problem launching fragment", e);
94            return false;
95        }
96    }
97
98    @Override
99    public boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) {
100        FragmentTransaction transaction = getFragmentManager().beginTransaction();
101        SubSettingsFragment fragment = new SubSettingsFragment();
102        final Bundle b = new Bundle(1);
103        b.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
104        fragment.setArguments(b);
105        fragment.setTargetFragment(caller, 0);
106        transaction.replace(R.id.content_frame, fragment);
107        transaction.addToBackStack("PreferenceFragment");
108        transaction.commit();
109        return true;
110    }
111
112    public static class SubSettingsFragment extends PreferenceFragment {
113        private PreferenceScreen mParentScreen;
114
115        @Override
116        public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
117            mParentScreen =
118                    (PreferenceScreen) ((PreferenceFragment) getTargetFragment())
119                            .getPreferenceScreen().findPreference(rootKey);
120            PreferenceScreen screen =
121                    getPreferenceManager().createPreferenceScreen(
122                            getPreferenceManager().getContext());
123            setPreferenceScreen(screen);
124            // Copy all the preferences over to this screen so they go into the attached state.
125            while (mParentScreen.getPreferenceCount() > 0) {
126                Preference p = mParentScreen.getPreference(0);
127                mParentScreen.removePreference(p);
128                screen.addPreference(p);
129            }
130        }
131
132        @Override
133        public void onDestroy() {
134            super.onDestroy();
135            // Copy all the preferences back so we don't lose them.
136            PreferenceScreen screen = getPreferenceScreen();
137            while (screen.getPreferenceCount() > 0) {
138                Preference p = screen.getPreference(0);
139                screen.removePreference(p);
140                mParentScreen.addPreference(p);
141            }
142        }
143    }
144
145}
146