99 lines
3.4 KiB
Java
99 lines
3.4 KiB
Java
/*
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* Copyright (C) 2015-2016 The CyanogenMod 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 android.util.Log;
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import org.lineageos.internal.util.FileUtils;
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.IOException;
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/**
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* Touchscreen Hovering
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*/
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public class TouchscreenHovering {
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private static final String TAG = "TouchscreenHovering";
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private static final String COMMAND_PATH = "/sys/class/sec/tsp/cmd";
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private static final String COMMAND_LIST_PATH = "/sys/class/sec/tsp/cmd_list";
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private static final String COMMAND_RESULT_PATH = "/sys/class/sec/tsp/cmd_result";
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private static final String HOVER_MODE = "hover_enable";
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private static final String HOVER_MODE_ENABLE = "hover_enable,1";
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private static final String HOVER_MODE_DISABLE = "hover_enable,0";
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private static final String STATUS_OK = ":OK";
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/**
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* Whether device supports touchscreen hovering.
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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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if (!FileUtils.isFileWritable(COMMAND_PATH) ||
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!FileUtils.isFileReadable(COMMAND_LIST_PATH) ||
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!FileUtils.isFileReadable(COMMAND_RESULT_PATH)) {
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return false;
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}
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BufferedReader reader = null;
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try {
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String currentLine;
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reader = new BufferedReader(new FileReader(COMMAND_LIST_PATH));
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while ((currentLine = reader.readLine()) != null) {
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if (HOVER_MODE.equals(currentLine)) {
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return true;
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}
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}
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} catch (IOException e) {
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Log.e(TAG, "Could not read from file " + COMMAND_LIST_PATH, e);
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} finally {
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if (reader != null) {
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try {
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reader.close();
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} catch (IOException e) {
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// Ignore exception, no recovery possible
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}
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}
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}
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return false;
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}
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/** This method returns the current activation status of touchscreen hovering
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*
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* @return boolean Must be false if touchscreen hovering 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 (HOVER_MODE_ENABLE + STATUS_OK).equals(
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FileUtils.readOneLine(COMMAND_RESULT_PATH));
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}
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/**
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* This method allows to setup touchscreen hovering status.
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*
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* @param status The new touchscreen hovering status
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* @return boolean Must be false if touchscreen hovering 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(COMMAND_PATH,
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status ? HOVER_MODE_ENABLE : HOVER_MODE_DISABLE);
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}
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}
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