/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.util;
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import android.text.TextUtils;
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import android.view.View;
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import android.view.Window;
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import com.android.launcher3.Utilities;
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import java.util.Arrays;
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/**
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* Utility class to manage various window flags to control system UI.
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*/
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public class SystemUiController {
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// Various UI states in increasing order of priority
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public static final int UI_STATE_BASE_WINDOW = 0;
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public static final int UI_STATE_ALL_APPS = 1;
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public static final int UI_STATE_WIDGET_BOTTOM_SHEET = 2;
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public static final int UI_STATE_ROOT_VIEW = 3;
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public static final int UI_STATE_OVERVIEW = 4;
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public static final int FLAG_LIGHT_NAV = 1 << 0;
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public static final int FLAG_DARK_NAV = 1 << 1;
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public static final int FLAG_LIGHT_STATUS = 1 << 2;
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public static final int FLAG_DARK_STATUS = 1 << 3;
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private final Window mWindow;
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private final int[] mStates = new int[5];
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public SystemUiController(Window window) {
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mWindow = window;
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}
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public void updateUiState(int uiState, boolean isLight) {
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updateUiState(uiState, isLight
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? (FLAG_LIGHT_NAV | FLAG_LIGHT_STATUS) : (FLAG_DARK_NAV | FLAG_DARK_STATUS));
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}
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public void updateUiState(int uiState, int flags) {
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if (mStates[uiState] == flags) {
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return;
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}
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mStates[uiState] = flags;
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int oldFlags = mWindow.getDecorView().getSystemUiVisibility();
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// Apply the state flags in priority order
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int newFlags = oldFlags;
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for (int stateFlag : mStates) {
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if (Utilities.ATLEAST_OREO) {
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if ((stateFlag & FLAG_LIGHT_NAV) != 0) {
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newFlags |= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR;
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} else if ((stateFlag & FLAG_DARK_NAV) != 0) {
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newFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
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}
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}
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if ((stateFlag & FLAG_LIGHT_STATUS) != 0) {
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newFlags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
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} else if ((stateFlag & FLAG_DARK_STATUS) != 0) {
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newFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
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}
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}
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if (newFlags != oldFlags) {
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mWindow.getDecorView().setSystemUiVisibility(newFlags);
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}
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}
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@Override
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public String toString() {
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return "mStates=" + Arrays.toString(mStates);
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}
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}
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