| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.car.navigationbar; |
| |
| import android.app.ActivityManager; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.content.pm.ResolveInfo; |
| import android.view.Display; |
| import android.view.View; |
| import android.view.ViewGroup; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.inject.Inject; |
| import javax.inject.Singleton; |
| |
| /** |
| * CarNavigationButtons can optionally have selection state that toggles certain visual indications |
| * based on whether the active application on screen is associated with it. This is basically a |
| * similar concept to a radio button group. |
| * |
| * This class controls the selection state of CarNavigationButtons that have opted in to have such |
| * selection state-dependent visual indications. |
| */ |
| @Singleton |
| public class ButtonSelectionStateController { |
| |
| private final Set<CarNavigationButton> mRegisteredViews = new HashSet<>(); |
| |
| protected ButtonMap mButtonsByCategory = new ButtonMap(); |
| protected ButtonMap mButtonsByPackage = new ButtonMap(); |
| protected ButtonMap mButtonsByComponentName = new ButtonMap(); |
| protected HashSet<CarNavigationButton> mSelectedButtons; |
| protected Context mContext; |
| |
| @Inject |
| public ButtonSelectionStateController(Context context) { |
| mContext = context; |
| mSelectedButtons = new HashSet<>(); |
| } |
| |
| /** |
| * Iterate through a view looking for CarNavigationButton and add it to the controller if it |
| * opted in to be highlighted when the active application is associated with it. |
| * |
| * @param v the View that may contain CarFacetButtons |
| */ |
| protected void addAllButtonsWithSelectionState(View v) { |
| if (v instanceof CarNavigationButton) { |
| if (((CarNavigationButton) v).hasSelectionState()) { |
| addButtonWithSelectionState((CarNavigationButton) v); |
| } |
| } else if (v instanceof ViewGroup) { |
| ViewGroup viewGroup = (ViewGroup) v; |
| for (int i = 0; i < viewGroup.getChildCount(); i++) { |
| addAllButtonsWithSelectionState(viewGroup.getChildAt(i)); |
| } |
| } |
| } |
| |
| /** Removes all buttons from the button maps. */ |
| protected void removeAll() { |
| mButtonsByCategory.clear(); |
| mButtonsByPackage.clear(); |
| mButtonsByComponentName.clear(); |
| mSelectedButtons.clear(); |
| mRegisteredViews.clear(); |
| } |
| |
| /** |
| * This will unselect the currently selected CarNavigationButton and determine which one should |
| * be selected next. It does this by reading the properties on the CarNavigationButton and |
| * seeing if they are a match with the supplied StackInfo list. |
| * The order of selection detection is ComponentName, PackageName then Category |
| * They will then be compared with the supplied StackInfo list. |
| * The StackInfo is expected to be supplied in order of recency and StackInfo will only be used |
| * for consideration if it has the same displayId as the CarNavigationButton. |
| * |
| * @param stackInfoList of the currently running application |
| * @param validDisplay index of the valid display |
| */ |
| |
| protected void taskChanged(List<ActivityManager.StackInfo> stackInfoList, int validDisplay) { |
| ActivityManager.StackInfo validStackInfo = null; |
| for (ActivityManager.StackInfo stackInfo : stackInfoList) { |
| // Find the first stack info with a topActivity in the primary display. |
| // TODO: We assume that CarFacetButton will launch an app only in the primary display. |
| // We need to extend the functionality to handle the multiple display properly. |
| if (stackInfo.topActivity != null && stackInfo.displayId == validDisplay) { |
| validStackInfo = stackInfo; |
| break; |
| } |
| } |
| |
| if (validStackInfo == null) { |
| // No stack was found that was on the same display as the buttons thus return |
| return; |
| } |
| int displayId = validStackInfo.displayId; |
| |
| mSelectedButtons.forEach(carNavigationButton -> { |
| if (carNavigationButton.getDisplayId() == displayId) { |
| carNavigationButton.setSelected(false); |
| } |
| }); |
| mSelectedButtons.clear(); |
| |
| HashSet<CarNavigationButton> selectedButtons = findSelectedButtons(validStackInfo); |
| |
| if (selectedButtons != null) { |
| selectedButtons.forEach(carNavigationButton -> { |
| if (carNavigationButton.getDisplayId() == displayId) { |
| carNavigationButton.setSelected(true); |
| mSelectedButtons.add(carNavigationButton); |
| } |
| }); |
| } |
| } |
| |
| /** |
| * Defaults to Display.DEFAULT_DISPLAY when no parameter is provided for the validDisplay. |
| * |
| * @param stackInfoList |
| */ |
| protected void taskChanged(List<ActivityManager.StackInfo> stackInfoList) { |
| taskChanged(stackInfoList, Display.DEFAULT_DISPLAY); |
| } |
| |
| /** |
| * Add navigation button to this controller if it uses selection state. |
| */ |
| private void addButtonWithSelectionState(CarNavigationButton carNavigationButton) { |
| if (mRegisteredViews.contains(carNavigationButton)) { |
| return; |
| } |
| String[] categories = carNavigationButton.getCategories(); |
| for (int i = 0; i < categories.length; i++) { |
| mButtonsByCategory.add(categories[i], carNavigationButton); |
| } |
| |
| String[] packages = carNavigationButton.getPackages(); |
| for (int i = 0; i < packages.length; i++) { |
| mButtonsByPackage.add(packages[i], carNavigationButton); |
| } |
| String[] componentNames = carNavigationButton.getComponentName(); |
| for (int i = 0; i < componentNames.length; i++) { |
| mButtonsByComponentName.add(componentNames[i], carNavigationButton); |
| } |
| |
| mRegisteredViews.add(carNavigationButton); |
| } |
| |
| private HashSet<CarNavigationButton> findSelectedButtons( |
| ActivityManager.StackInfo validStackInfo) { |
| String packageName = validStackInfo.topActivity.getPackageName(); |
| |
| HashSet<CarNavigationButton> selectedButtons = |
| findButtonsByComponentName(validStackInfo.topActivity); |
| if (selectedButtons == null) { |
| selectedButtons = mButtonsByPackage.get(packageName); |
| } |
| if (selectedButtons == null) { |
| String category = getPackageCategory(packageName); |
| if (category != null) { |
| selectedButtons = mButtonsByCategory.get(category); |
| } |
| } |
| |
| return selectedButtons; |
| } |
| |
| private HashSet<CarNavigationButton> findButtonsByComponentName( |
| ComponentName componentName) { |
| HashSet<CarNavigationButton> buttons = |
| mButtonsByComponentName.get(componentName.flattenToShortString()); |
| return (buttons != null) ? buttons : |
| mButtonsByComponentName.get(componentName.flattenToString()); |
| } |
| |
| private String getPackageCategory(String packageName) { |
| PackageManager pm = mContext.getPackageManager(); |
| Set<String> supportedCategories = mButtonsByCategory.keySet(); |
| for (String category : supportedCategories) { |
| Intent intent = new Intent(); |
| intent.setPackage(packageName); |
| intent.setAction(Intent.ACTION_MAIN); |
| intent.addCategory(category); |
| List<ResolveInfo> list = pm.queryIntentActivities(intent, 0); |
| if (list.size() > 0) { |
| // Cache this package name into ButtonsByPackage map, so we won't have to query |
| // all categories next time this package name shows up. |
| mButtonsByPackage.put(packageName, mButtonsByCategory.get(category)); |
| return category; |
| } |
| } |
| return null; |
| } |
| |
| // simple multi-map |
| private static class ButtonMap extends HashMap<String, HashSet<CarNavigationButton>> { |
| |
| public boolean add(String key, CarNavigationButton value) { |
| if (containsKey(key)) { |
| return get(key).add(value); |
| } |
| HashSet<CarNavigationButton> set = new HashSet<>(); |
| set.add(value); |
| put(key, set); |
| return true; |
| } |
| } |
| } |