1 /* 2 * Copyright (C) 2020 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.util; 18 19 import static android.view.Surface.ROTATION_0; 20 import static android.view.Surface.ROTATION_180; 21 import static android.view.Surface.ROTATION_270; 22 import static android.view.Surface.ROTATION_90; 23 24 import android.graphics.Insets; 25 import android.view.Surface.Rotation; 26 27 /** 28 * A class containing utility methods related to rotation. 29 * 30 * @hide 31 */ 32 public class RotationUtils { 33 34 /** 35 * Rotates an Insets according to the given rotation. 36 */ rotateInsets(Insets insets, @Rotation int rotation)37 public static Insets rotateInsets(Insets insets, @Rotation int rotation) { 38 if (insets == null || insets == Insets.NONE) { 39 return insets; 40 } 41 Insets rotated; 42 switch (rotation) { 43 case ROTATION_0: 44 rotated = insets; 45 break; 46 case ROTATION_90: 47 rotated = Insets.of( 48 insets.top, 49 insets.right, 50 insets.bottom, 51 insets.left); 52 break; 53 case ROTATION_180: 54 rotated = Insets.of( 55 insets.right, 56 insets.bottom, 57 insets.left, 58 insets.top); 59 break; 60 case ROTATION_270: 61 rotated = Insets.of( 62 insets.bottom, 63 insets.left, 64 insets.top, 65 insets.right); 66 break; 67 default: 68 throw new IllegalArgumentException("unknown rotation: " + rotation); 69 } 70 return rotated; 71 } 72 } 73