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.systemui.statusbar.policy;
18
19import java.util.ArrayList;
20
21public final class KeyguardMonitor {
22
23    private final ArrayList<Callback> mCallbacks = new ArrayList<Callback>();
24
25    private boolean mShowing;
26    private boolean mSecure;
27
28    public void addCallback(Callback callback) {
29        mCallbacks.add(callback);
30    }
31
32    public void removeCallback(Callback callback) {
33        mCallbacks.remove(callback);
34    }
35
36    public boolean isShowing() {
37        return mShowing;
38    }
39
40    public boolean isSecure() {
41        return mSecure;
42    }
43
44    public void notifyKeyguardState(boolean showing, boolean secure) {
45        if (mShowing == showing && mSecure == secure) return;
46        mShowing = showing;
47        mSecure = secure;
48        for (Callback callback : mCallbacks) {
49            callback.onKeyguardChanged();
50        }
51    }
52
53    public interface Callback {
54        void onKeyguardChanged();
55    }
56}