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.phone.settings;
18
19import com.android.phone.R;
20
21import android.app.AlertDialog;
22import android.content.Context;
23import android.content.DialogInterface;
24import android.content.Intent;
25import android.os.UserHandle;
26import android.preference.ListPreference;
27import android.preference.Preference;
28import android.telecom.PhoneAccountHandle;
29import android.telecom.TelecomManager;
30import android.util.AttributeSet;
31
32import java.util.List;
33import java.util.Objects;
34
35public class AccountSelectionPreference extends ListPreference implements
36        Preference.OnPreferenceChangeListener {
37
38    public interface AccountSelectionListener {
39        boolean onAccountSelected(AccountSelectionPreference pref, PhoneAccountHandle account);
40        void onAccountSelectionDialogShow(AccountSelectionPreference pref);
41        void onAccountChanged(AccountSelectionPreference pref);
42    }
43
44    private final Context mContext;
45    private AccountSelectionListener mListener;
46    private PhoneAccountHandle[] mAccounts;
47    private String[] mEntryValues;
48    private CharSequence[] mEntries;
49    private boolean mShowSelectionInSummary = true;
50
51    public AccountSelectionPreference(Context context) {
52        this(context, null);
53    }
54
55    public AccountSelectionPreference(Context context, AttributeSet attrs) {
56        super(context, attrs);
57        mContext = context;
58        setOnPreferenceChangeListener(this);
59    }
60
61    public void setListener(AccountSelectionListener listener) {
62        mListener = listener;
63    }
64
65    public void setShowSelectionInSummary(boolean value) {
66        mShowSelectionInSummary = value;
67    }
68
69    public void setModel(
70            TelecomManager telecomManager,
71            List<PhoneAccountHandle> accountsList,
72            PhoneAccountHandle currentSelection,
73            CharSequence nullSelectionString) {
74
75        mAccounts = accountsList.toArray(new PhoneAccountHandle[accountsList.size()]);
76        mEntryValues = new String[mAccounts.length + 1];
77        mEntries = new CharSequence[mAccounts.length + 1];
78
79        int selectedIndex = mAccounts.length;  // Points to nullSelectionString by default
80        int i = 0;
81        for ( ; i < mAccounts.length; i++) {
82            CharSequence label = telecomManager.getPhoneAccount(mAccounts[i]).getLabel();
83            mEntries[i] = label == null ? null : label.toString();
84            mEntryValues[i] = Integer.toString(i);
85            if (Objects.equals(currentSelection, mAccounts[i])) {
86                selectedIndex = i;
87            }
88        }
89        mEntryValues[i] = Integer.toString(i);
90        mEntries[i] = nullSelectionString;
91
92        setEntryValues(mEntryValues);
93        setEntries(mEntries);
94        setValueIndex(selectedIndex);
95        if (mShowSelectionInSummary) {
96            setSummary(mEntries[selectedIndex]);
97        }
98    }
99
100    @Override
101    public boolean onPreferenceChange(Preference preference, Object newValue) {
102        if (mListener != null) {
103            int index = Integer.parseInt((String) newValue);
104            PhoneAccountHandle account = index < mAccounts.length ? mAccounts[index] : null;
105            if (mListener.onAccountSelected(this, account)) {
106                if (mShowSelectionInSummary) {
107                    setSummary(mEntries[index]);
108                }
109                if (index != findIndexOfValue(getValue())) {
110                    setValueIndex(index);
111                    mListener.onAccountChanged(this);
112                }
113                return true;
114            }
115        }
116        return false;
117    }
118
119    /**
120     * Modifies the dialog to change the default "Cancel" button to "Choose Accounts", which
121     * triggers the {@link PhoneAccountSelectionPreferenceActivity} to be shown.
122     *
123     * @param builder The {@code AlertDialog.Builder}.
124     */
125    @Override
126    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
127        // Notify the listener that the dialog is about to be built.  This is important so that the
128        // list of enabled accounts can be updated prior to showing the dialog.
129        mListener.onAccountSelectionDialogShow(this);
130
131        super.onPrepareDialogBuilder(builder);
132    }
133}
134