63 lines
2.0 KiB
Java
63 lines
2.0 KiB
Java
/*
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* Copyright (C) 2018 TeamNexus
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* Copyright (C) 2018 The LineageOS 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 org.lineageos.hardware;
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import org.lineageos.internal.util.FileUtils;
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/**
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* Reader mode
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*/
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public class ReadingEnhancement {
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private static final String ACCESSIBILITY_FILE =
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"/sys/devices/virtual/mdnie/mdnie/accessibility";
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/**
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* Whether device supports Reader Mode
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*
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* @return boolean Supported devices must return always true
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*/
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public static boolean isSupported() {
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return FileUtils.isFileWritable(ACCESSIBILITY_FILE) &&
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FileUtils.isFileReadable(ACCESSIBILITY_FILE);
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}
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/**
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* This method return the current activation status of Reader Mode
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*
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* @return boolean Must be false when Reader Mode is not supported or not activated,
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* or the operation failed while reading the status; true in any other case.
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*/
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public static boolean isEnabled() {
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return FileUtils.readOneLine(ACCESSIBILITY_FILE).equals(
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"Current accessibility : DSI0 : GRAYSCALE ");
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}
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/**
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* This method allows to setup Reader Mode
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*
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* @param status The new Reader Mode status
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* @return boolean Must be false if Reader Mode is not supported or the operation
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* failed; true in any other case.
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*/
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public static boolean setEnabled(boolean status) {
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return FileUtils.writeLine(ACCESSIBILITY_FILE, status ? "4" : "0");
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}
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}
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