1 /* 2 * Copyright (C) 2017 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.launcher3.util; 18 19 import android.text.TextUtils; 20 import android.view.View; 21 import android.view.Window; 22 23 import com.android.launcher3.Utilities; 24 25 import java.util.Arrays; 26 27 /** 28 * Utility class to manage various window flags to control system UI. 29 */ 30 public class SystemUiController { 31 32 // Various UI states in increasing order of priority 33 public static final int UI_STATE_BASE_WINDOW = 0; 34 public static final int UI_STATE_ALL_APPS = 1; 35 public static final int UI_STATE_WIDGET_BOTTOM_SHEET = 2; 36 public static final int UI_STATE_ROOT_VIEW = 3; 37 public static final int UI_STATE_OVERVIEW = 4; 38 39 public static final int FLAG_LIGHT_NAV = 1 << 0; 40 public static final int FLAG_DARK_NAV = 1 << 1; 41 public static final int FLAG_LIGHT_STATUS = 1 << 2; 42 public static final int FLAG_DARK_STATUS = 1 << 3; 43 44 private final Window mWindow; 45 private final int[] mStates = new int[5]; 46 SystemUiController(Window window)47 public SystemUiController(Window window) { 48 mWindow = window; 49 } 50 updateUiState(int uiState, boolean isLight)51 public void updateUiState(int uiState, boolean isLight) { 52 updateUiState(uiState, isLight 53 ? (FLAG_LIGHT_NAV | FLAG_LIGHT_STATUS) : (FLAG_DARK_NAV | FLAG_DARK_STATUS)); 54 } 55 updateUiState(int uiState, int flags)56 public void updateUiState(int uiState, int flags) { 57 if (mStates[uiState] == flags) { 58 return; 59 } 60 mStates[uiState] = flags; 61 62 int oldFlags = mWindow.getDecorView().getSystemUiVisibility(); 63 // Apply the state flags in priority order 64 int newFlags = oldFlags; 65 for (int stateFlag : mStates) { 66 if (Utilities.ATLEAST_OREO) { 67 if ((stateFlag & FLAG_LIGHT_NAV) != 0) { 68 newFlags |= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR; 69 } else if ((stateFlag & FLAG_DARK_NAV) != 0) { 70 newFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR); 71 } 72 } 73 74 if ((stateFlag & FLAG_LIGHT_STATUS) != 0) { 75 newFlags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; 76 } else if ((stateFlag & FLAG_DARK_STATUS) != 0) { 77 newFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR); 78 } 79 } 80 if (newFlags != oldFlags) { 81 mWindow.getDecorView().setSystemUiVisibility(newFlags); 82 } 83 } 84 85 @Override toString()86 public String toString() { 87 return "mStates=" + Arrays.toString(mStates); 88 } 89 } 90