| /* |
| * Copyright (C) 2019 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.server.wm; |
| |
| import android.annotation.NonNull; |
| import android.os.SystemProperties; |
| import android.util.ArraySet; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| /** |
| * A Blacklist for packages that should force the display out of high refresh rate. |
| */ |
| class HighRefreshRateBlacklist { |
| |
| private static final String SYSPROP_KEY = "ro.window_manager.high_refresh_rate_blacklist"; |
| private static final String SYSPROP_KEY_LENGTH_SUFFIX = "_length"; |
| private static final String SYSPROP_KEY_ENTRY_SUFFIX = "_entry"; |
| private static final int MAX_ENTRIES = 50; |
| |
| private ArraySet<String> mBlacklistedPackages = new ArraySet<>(); |
| |
| static HighRefreshRateBlacklist create() { |
| return new HighRefreshRateBlacklist(new SystemPropertyGetter() { |
| @Override |
| public int getInt(String key, int def) { |
| return SystemProperties.getInt(key, def); |
| } |
| |
| @Override |
| public String get(String key) { |
| return SystemProperties.get(key); |
| } |
| }); |
| } |
| |
| @VisibleForTesting |
| HighRefreshRateBlacklist(SystemPropertyGetter propertyGetter) { |
| |
| // Read and populate the blacklist |
| final int length = Math.min( |
| propertyGetter.getInt(SYSPROP_KEY + SYSPROP_KEY_LENGTH_SUFFIX, 0), |
| MAX_ENTRIES); |
| for (int i = 1; i <= length; i++) { |
| final String packageName = propertyGetter.get( |
| SYSPROP_KEY + SYSPROP_KEY_ENTRY_SUFFIX + i); |
| if (!packageName.isEmpty()) { |
| mBlacklistedPackages.add(packageName); |
| } |
| } |
| } |
| |
| boolean isBlacklisted(String packageName) { |
| return mBlacklistedPackages.contains(packageName); |
| } |
| |
| interface SystemPropertyGetter { |
| int getInt(String key, int def); |
| @NonNull String get(String key); |
| } |
| } |