1 /*
2  * Copyright (C) 2021 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 android.car.builtin.view;
18 
19 import android.annotation.SystemApi;
20 import android.view.Display;
21 import android.view.DisplayAddress;
22 
23 /**
24  * Provide access to {@code android.view.Display} calls.
25  * @hide
26  */
27 @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
28 public final class DisplayHelper {
29 
30     public static final int INVALID_PORT = -1;
31 
32     /** Display type: Physical display connected through an internal port. */
33     public static final int TYPE_INTERNAL = Display.TYPE_INTERNAL;
34     /** Display type: Physical display connected through an external port. */
35     public static final int TYPE_EXTERNAL = Display.TYPE_EXTERNAL;
36     /** Display type: Virtual display. */
37     public static final int TYPE_VIRTUAL = Display.TYPE_VIRTUAL;
38 
DisplayHelper()39     private DisplayHelper() {
40         throw new UnsupportedOperationException();
41     }
42 
43     /**
44      * @return the physical port number of the display, or {@code INVALID_PORT} if the display isn't
45      *         the physical one.
46      */
getPhysicalPort(Display display)47     public static int getPhysicalPort(Display display) {
48         DisplayAddress address = display.getAddress();
49         if (address instanceof DisplayAddress.Physical) {
50             DisplayAddress.Physical physicalAddress = (DisplayAddress.Physical) address;
51             if (physicalAddress != null) {
52                 return physicalAddress.getPort();
53             }
54         }
55         return INVALID_PORT;
56     }
57 
58     /**
59      * @return the uniqueId of the given display.
60      */
getUniqueId(Display display)61     public static String getUniqueId(Display display) {
62         return display.getUniqueId();
63     }
64 
65     /**
66      * Gets the display type.
67      * @see Display.getType()
68      */
getType(Display display)69     public static int getType(Display display) {
70         return display.getType();
71     }
72 }
73