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1 /*
2  * Copyright 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 android.hardware.display;
18 
19 import static android.hardware.display.DisplayTopology.TreeNode.positionToString;
20 
21 /**
22  * Graph of the displays in {@link android.hardware.display.DisplayTopology} tree.
23  *
24  * @hide
25  */
DisplayTopologyGraph(int primaryDisplayId, DisplayNode[] displayNodes)26 public record DisplayTopologyGraph(int primaryDisplayId, DisplayNode[] displayNodes) {
27     /**
28      * Display in the topology
29      */
30     public record DisplayNode(
31             int displayId,
32             int density,
33             AdjacentDisplay[] adjacentDisplays) {}
34 
35     /**
36      * Edge to adjacent display
37      */
38     public record AdjacentDisplay(
39             // The logical Id of this adjacent display
40             int displayId,
41             // Side of the other display which touches this adjacent display.
42             @DisplayTopology.TreeNode.Position
43             int position,
44             // The distance from the top edge of the other display to the top edge of this display
45             // (in case of POSITION_LEFT or POSITION_RIGHT) or from the left edge of the parent
46             // display to the left edge of this display (in case of POSITION_TOP or
47             // POSITION_BOTTOM). The unit used is density-independent pixels (dp).
48             float offsetDp) {
49         @Override
50         public String toString() {
51             return "AdjacentDisplay{"
52                     + "displayId=" + displayId
53                     + ", position=" + positionToString(position)
54                     + ", offsetDp=" + offsetDp
55                     + '}';
56         }
57     }
58 }
59