/talkback_preics/src/com/google/android/marvin/talkback/formatter/phone/NotificationFormatter.java

 1/*
 2 * Copyright (C) 2009 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.google.android.marvin.talkback.formatter.phone;
18
19import com.google.android.marvin.talkback.Formatter;
20import com.google.android.marvin.talkback.NotificationType;
21import com.google.android.marvin.talkback.Utils;
22import com.google.android.marvin.talkback.Utterance;
23
24import android.app.Notification;
25import android.content.Context;
26import android.os.Parcelable;
27import android.view.accessibility.AccessibilityEvent;
28
29/**
30 * Formatter that returns an utterance to announce text replacement.
31 *
32 * @author svetoslavganov@google.conm (Svetoslav R. Ganov)
33 */
34public final class NotificationFormatter implements Formatter {
35
36    private static final String SPACE = " ";
37
38    @Override
39    public void format(AccessibilityEvent event, Context context, Utterance utterance, Object args) {
40        StringBuilder utteranceText = utterance.getText();
41        StringBuilder eventText = Utils.getEventText(context, event);
42        
43        NotificationType type;
44        Parcelable parcelable = event.getParcelableData();
45        if (parcelable instanceof Notification) {
46            int icon = ((Notification) parcelable).icon;
47            // special case since the notification appears several
48            // times while the phone call goes through different phases
49            // resulting in multiple announcement of the fact that a phone
50            // call is in progress which the user is already aware of
51            if (icon == NotificationType.ICON_PHONE_CALL) {
52                type = null; // ignore this notification
53            } else {
54                type = NotificationType.getNotificationTypeFromIcon(icon);
55            }
56        } else {
57            type = null;
58        }
59
60        if (type != null) {
61            CharSequence typeText = context.getResources().getString(type.getValue());
62            utteranceText.append(typeText);
63            utteranceText.append(SPACE);
64        }
65        utteranceText.append(eventText);
66    }
67}