1 /*
2  * Copyright (C) 2024 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 
17 package com.android.car.systeminterface;
18 
19 import android.car.builtin.view.DisplayHelper;
20 import android.view.Display;
21 
22 /**
23  * An interface to wrap {@link DisplayHelper} methods.
24  *
25  * This allows faking the implementation for tests.
26  */
27 public interface DisplayHelperInterface {
28     /**
29      * @return the physical port number of the display, or {@code INVALID_PORT} if the display isn't
30      *         the physical one.
31      */
getPhysicalPort(Display display)32     int getPhysicalPort(Display display);
33 
34     /**
35      * @return the uniqueId of the given display.
36      */
getUniqueId(Display display)37     String getUniqueId(Display display);
38 
39     /**
40      * Gets the display type.
41      */
getType(Display display)42     int getType(Display display);
43 
44     /**
45      * A real implementation.
46      */
47     final class DefaultImpl implements DisplayHelperInterface {
48         @Override
getPhysicalPort(Display display)49         public int getPhysicalPort(Display display) {
50             return DisplayHelper.getPhysicalPort(display);
51         }
52 
53         @Override
getUniqueId(Display display)54         public String getUniqueId(Display display) {
55             return DisplayHelper.getUniqueId(display);
56         }
57 
58         @Override
getType(Display display)59         public int getType(Display display) {
60             return DisplayHelper.getType(display);
61         }
62     }
63 }
64