1 /* 2 * Copyright (C) 2018 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.internal.policy; 18 19 import android.content.res.Resources; 20 21 import com.android.internal.R; 22 23 /** 24 * Utility functions for screen decorations used by both window manager and System UI. 25 */ 26 public class ScreenDecorationsUtils { 27 28 /** 29 * Corner radius that should be used on windows in order to cover the display. 30 * These values are expressed in pixels because they should not respect display or font 31 * scaling, this means that we don't have to reload them on config changes. 32 */ getWindowCornerRadius(Resources resources)33 public static float getWindowCornerRadius(Resources resources) { 34 if (!supportsRoundedCornersOnWindows(resources)) { 35 return 0f; 36 } 37 38 // Radius that should be used in case top or bottom aren't defined. 39 float defaultRadius = resources.getDimension(R.dimen.rounded_corner_radius); 40 41 float topRadius = resources.getDimension(R.dimen.rounded_corner_radius_top); 42 if (topRadius == 0f) { 43 topRadius = defaultRadius; 44 } 45 float bottomRadius = resources.getDimension(R.dimen.rounded_corner_radius_bottom); 46 if (bottomRadius == 0f) { 47 bottomRadius = defaultRadius; 48 } 49 50 // Always use the smallest radius to make sure the rounded corners will 51 // completely cover the display. 52 return Math.min(topRadius, bottomRadius); 53 } 54 55 /** 56 * If live rounded corners are supported on windows. 57 */ supportsRoundedCornersOnWindows(Resources resources)58 public static boolean supportsRoundedCornersOnWindows(Resources resources) { 59 return resources.getBoolean(R.bool.config_supportsRoundedCornersOnWindows); 60 } 61 } 62