1/*
2 * Copyright (C) 2016 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.dialer.app.calllog;
18
19import android.support.v7.widget.RecyclerView;
20import android.view.LayoutInflater;
21import android.view.View;
22import android.view.ViewGroup;
23import com.android.dialer.app.R;
24import com.android.dialer.app.alert.AlertManager;
25import com.android.dialer.common.Assert;
26
27/** Manages "alerts" to be shown at the top of an call log to gain the user's attention. */
28public class CallLogAlertManager implements AlertManager {
29
30  private final CallLogAdapter adapter;
31  private final View view;
32  private final LayoutInflater inflater;
33  private final ViewGroup parent;
34  private final ViewGroup container;
35
36  public CallLogAlertManager(CallLogAdapter adapter, LayoutInflater inflater, ViewGroup parent) {
37    this.adapter = adapter;
38    this.inflater = inflater;
39    this.parent = parent;
40    view = inflater.inflate(R.layout.call_log_alert_item, parent, false);
41    container = (ViewGroup) view.findViewById(R.id.container);
42  }
43
44  @Override
45  public View inflate(int layoutId) {
46    return inflater.inflate(layoutId, container, false);
47  }
48
49  public RecyclerView.ViewHolder createViewHolder(ViewGroup parent) {
50    Assert.checkArgument(
51        parent == this.parent,
52        "createViewHolder should be called with the same parent in constructor");
53    return new AlertViewHolder(view);
54  }
55
56  public boolean isEmpty() {
57    return container.getChildCount() == 0;
58  }
59
60  public boolean contains(View view) {
61    return container.indexOfChild(view) != -1;
62  }
63
64  @Override
65  public void clear() {
66    container.removeAllViews();
67    adapter.notifyItemRemoved(CallLogAdapter.ALERT_POSITION);
68  }
69
70  @Override
71  public void add(View view) {
72    if (contains(view)) {
73      return;
74    }
75    container.addView(view);
76    if (container.getChildCount() == 1) {
77      // Was empty before
78      adapter.notifyItemInserted(CallLogAdapter.ALERT_POSITION);
79    }
80  }
81
82  /**
83   * Does nothing. The view this ViewHolder show is directly managed by {@link CallLogAlertManager}
84   */
85  private static class AlertViewHolder extends RecyclerView.ViewHolder {
86    private AlertViewHolder(View view) {
87      super(view);
88    }
89  }
90}
91