1/*
2 * Copyright (C) 2011 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.email.activity;
18
19import com.android.email.R;
20import com.android.email.activity.setup.
21        AccountSettingsEditQuickResponsesFragment.QuickResponseFinder;
22import com.android.emailcommon.provider.Account;
23import com.android.emailcommon.utility.EmailAsyncTask;
24
25import android.app.AlertDialog;
26import android.app.Dialog;
27import android.app.DialogFragment;
28import android.app.Fragment;
29import android.content.Context;
30import android.content.DialogInterface;
31import android.os.Bundle;
32import android.view.View;
33import android.widget.AdapterView;
34import android.widget.AdapterView.OnItemClickListener;
35import android.widget.ListView;
36
37/**
38 * Dialog which lists QuickResponses for the specified account. On user selection, will call
39 * Callback.onQuickResponseSelected() with the selected QuickResponse text.
40 */
41public class InsertQuickResponseDialog extends DialogFragment
42        implements DialogInterface.OnClickListener, OnItemClickListener {
43    private ListView mQuickResponsesView;
44    private EmailAsyncTask.Tracker mTaskTracker;
45
46    // Key for the Account object in the arguments bundle
47    private static final String ACCOUNT_KEY = "account";
48
49    /**
50     * Callback interface for when user selects a QuickResponse.
51     */
52    public interface Callback {
53        /**
54         * Handles the text of the selected QuickResponse.
55         */
56        public void onQuickResponseSelected(CharSequence quickResponse);
57    }
58
59    /**
60     * Create and returns new dialog.
61     *
62     * @param callbackFragment fragment that implements {@link Callback}.  Or null, in which case
63     * the parent activity must implement {@link Callback}.
64     */
65    public static InsertQuickResponseDialog
66            newInstance(Fragment callbackFragment, Account account) {
67        final InsertQuickResponseDialog dialog = new InsertQuickResponseDialog();
68
69        // If a target is set, it MUST implement Callback. Fail-fast if not.
70        final Callback callback;
71        if (callbackFragment != null) {
72            try {
73                callback = (Callback) callbackFragment;
74            } catch (ClassCastException e) {
75                throw new ClassCastException(callbackFragment.toString()
76                        + " must implement Callback");
77            }
78            dialog.setTargetFragment(callbackFragment, 0);
79        }
80
81        Bundle args = new Bundle();
82        args.putParcelable(ACCOUNT_KEY, account);
83        dialog.setArguments(args);
84        return dialog;
85    }
86
87    @Override
88    public Dialog onCreateDialog(Bundle savedInstanceState) {
89        // If target not set, the parent activity MUST implement Callback. Fail-fast if not.
90        final Fragment targetFragment = getTargetFragment();
91        if (targetFragment != null) {
92            final Callback callback;
93            try {
94                callback = (Callback) getActivity();
95            } catch (ClassCastException e) {
96                throw new ClassCastException(getActivity().toString() + " must implement Callback");
97            }
98        }
99
100        // Now that Callback implementation is verified, build the dialog
101        final Context context = getActivity();
102        final AlertDialog.Builder b = new AlertDialog.Builder(context);
103
104        mQuickResponsesView = new ListView(context);
105
106        Account account = (Account) getArguments().getParcelable(ACCOUNT_KEY);
107        mTaskTracker = new EmailAsyncTask.Tracker();
108        new QuickResponseFinder(mTaskTracker, account.mId, mQuickResponsesView,
109                context, null, this, false).executeParallel();
110
111        b.setTitle(getResources()
112                .getString(R.string.message_compose_insert_quick_response_list_title))
113                .setView(mQuickResponsesView)
114                .setNegativeButton(R.string.cancel_action, this);
115        return b.create();
116    }
117
118    @Override
119    public void onDestroy() {
120        mTaskTracker.cancellAllInterrupt();
121        super.onDestroy();
122    }
123
124    /**
125     * Implements OnItemClickListener.
126     */
127    @Override
128    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
129        getCallback().onQuickResponseSelected(
130                mQuickResponsesView.getItemAtPosition(position).toString());
131        dismiss();
132    }
133
134    /**
135     * Implements DialogInterface.OnClickListener
136     */
137    @Override
138    public void onClick(DialogInterface dialog, int which) {
139        if (which == DialogInterface.BUTTON_NEGATIVE) {
140            dialog.cancel();
141        }
142    }
143
144    private Callback getCallback() {
145        Fragment targetFragment = getTargetFragment();
146        if (targetFragment != null) {
147            return (Callback) targetFragment;
148        }
149        return (Callback) getActivity();
150    }
151}
152