Ady Abraham | f3e0531 | 2019-05-13 18:04:59 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2019 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.server.wm; |
| 18 | |
| 19 | import android.annotation.NonNull; |
| 20 | import android.os.SystemProperties; |
| 21 | import android.util.ArraySet; |
| 22 | |
| 23 | import com.android.internal.annotations.VisibleForTesting; |
| 24 | |
| 25 | /** |
| 26 | * A Blacklist for packages that should force the display out of high refresh rate. |
| 27 | */ |
| 28 | class HighRefreshRateBlacklist { |
| 29 | |
| 30 | private static final String SYSPROP_KEY = "ro.window_manager.high_refresh_rate_blacklist"; |
| 31 | private static final String SYSPROP_KEY_LENGTH_SUFFIX = "_length"; |
| 32 | private static final String SYSPROP_KEY_ENTRY_SUFFIX = "_entry"; |
| 33 | private static final int MAX_ENTRIES = 50; |
| 34 | |
| 35 | private ArraySet<String> mBlacklistedPackages = new ArraySet<>(); |
| 36 | |
| 37 | static HighRefreshRateBlacklist create() { |
| 38 | return new HighRefreshRateBlacklist(new SystemPropertyGetter() { |
| 39 | @Override |
| 40 | public int getInt(String key, int def) { |
| 41 | return SystemProperties.getInt(key, def); |
| 42 | } |
| 43 | |
| 44 | @Override |
| 45 | public String get(String key) { |
| 46 | return SystemProperties.get(key); |
| 47 | } |
| 48 | }); |
| 49 | } |
| 50 | |
| 51 | @VisibleForTesting |
| 52 | HighRefreshRateBlacklist(SystemPropertyGetter propertyGetter) { |
| 53 | |
| 54 | // Read and populate the blacklist |
| 55 | final int length = Math.min( |
| 56 | propertyGetter.getInt(SYSPROP_KEY + SYSPROP_KEY_LENGTH_SUFFIX, 0), |
| 57 | MAX_ENTRIES); |
| 58 | for (int i = 1; i <= length; i++) { |
| 59 | final String packageName = propertyGetter.get( |
| 60 | SYSPROP_KEY + SYSPROP_KEY_ENTRY_SUFFIX + i); |
| 61 | if (!packageName.isEmpty()) { |
| 62 | mBlacklistedPackages.add(packageName); |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | boolean isBlacklisted(String packageName) { |
| 68 | return mBlacklistedPackages.contains(packageName); |
| 69 | } |
| 70 | |
| 71 | interface SystemPropertyGetter { |
| 72 | int getInt(String key, int def); |
| 73 | @NonNull String get(String key); |
| 74 | } |
| 75 | } |