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