1/*
2 * Copyright (C) 2014 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.inputmethod.latin.settings;
18
19import android.os.Build;
20import android.preference.CheckBoxPreference;
21import android.preference.Preference;
22import android.preference.PreferenceGroup;
23import android.preference.SwitchPreference;
24
25import java.util.ArrayList;
26
27public class TwoStatePreferenceHelper {
28    private static final String EMPTY_TEXT = "";
29
30    private TwoStatePreferenceHelper() {
31        // This utility class is not publicly instantiable.
32    }
33
34    public static void replaceCheckBoxPreferencesBySwitchPreferences(final PreferenceGroup group) {
35        // The keyboard settings keeps using a CheckBoxPreference on KitKat or previous.
36        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
37            return;
38        }
39        // The keyboard settings starts using a SwitchPreference without switch on/off text on
40        // API versions newer than KitKat.
41        replaceAllCheckBoxPreferencesBySwitchPreferences(group);
42    }
43
44    private static void replaceAllCheckBoxPreferencesBySwitchPreferences(
45            final PreferenceGroup group) {
46        final ArrayList<Preference> preferences = new ArrayList<>();
47        final int count = group.getPreferenceCount();
48        for (int index = 0; index < count; index++) {
49            preferences.add(group.getPreference(index));
50        }
51        group.removeAll();
52        for (int index = 0; index < count; index++) {
53            final Preference preference = preferences.get(index);
54            if (preference instanceof CheckBoxPreference) {
55                addSwitchPreferenceBasedOnCheckBoxPreference((CheckBoxPreference)preference, group);
56            } else {
57                group.addPreference(preference);
58                if (preference instanceof PreferenceGroup) {
59                    replaceAllCheckBoxPreferencesBySwitchPreferences((PreferenceGroup)preference);
60                }
61            }
62        }
63    }
64
65    static void addSwitchPreferenceBasedOnCheckBoxPreference(final CheckBoxPreference checkBox,
66            final PreferenceGroup group) {
67        final SwitchPreference switchPref = new SwitchPreference(checkBox.getContext());
68        switchPref.setTitle(checkBox.getTitle());
69        switchPref.setKey(checkBox.getKey());
70        switchPref.setOrder(checkBox.getOrder());
71        switchPref.setPersistent(checkBox.isPersistent());
72        switchPref.setEnabled(checkBox.isEnabled());
73        switchPref.setChecked(checkBox.isChecked());
74        switchPref.setSummary(checkBox.getSummary());
75        switchPref.setSummaryOn(checkBox.getSummaryOn());
76        switchPref.setSummaryOff(checkBox.getSummaryOff());
77        switchPref.setSwitchTextOn(EMPTY_TEXT);
78        switchPref.setSwitchTextOff(EMPTY_TEXT);
79        group.addPreference(switchPref);
80        switchPref.setDependency(checkBox.getDependency());
81    }
82}
83