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/*
* Copyright (C) 2015 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.commands.hid;
import android.os.SystemClock;
import android.util.JsonReader;
import android.util.JsonToken;
import android.util.Log;
import android.util.SparseArray;
import libcore.io.IoUtils;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
public class Hid {
private static final String TAG = "HID";
private final Event.Reader mReader;
private final SparseArray<Device> mDevices;
private static void usage() {
error("Usage: hid [FILE]");
}
public static void main(String[] args) {
if (args.length != 1) {
usage();
System.exit(1);
}
InputStream stream = null;
try {
if (args[0].equals("-")) {
stream = System.in;
} else {
File f = new File(args[0]);
stream = new FileInputStream(f);
}
(new Hid(stream)).run();
} catch (Exception e) {
error("HID injection failed.", e);
System.exit(1);
} finally {
IoUtils.closeQuietly(stream);
}
}
private Hid(InputStream in) {
mDevices = new SparseArray<Device>();
try {
mReader = new Event.Reader(new InputStreamReader(in, "UTF-8"));
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
private void run() {
try {
Event e = null;
while ((e = mReader.getNextEvent()) != null) {
process(e);
}
} catch (IOException ex) {
error("Error reading in events.", ex);
}
for (int i = 0; i < mDevices.size(); i++) {
mDevices.valueAt(i).close();
}
}
private void process(Event e) {
final int index = mDevices.indexOfKey(e.getId());
if (index >= 0) {
Device d = mDevices.valueAt(index);
if (Event.COMMAND_DELAY.equals(e.getCommand())) {
d.addDelay(e.getDuration());
} else if (Event.COMMAND_REPORT.equals(e.getCommand())) {
d.sendReport(e.getReport());
} else {
error("Unknown command \"" + e.getCommand() + "\". Ignoring event.");
}
} else {
registerDevice(e);
}
}
private void registerDevice(Event e) {
if (!Event.COMMAND_REGISTER.equals(e.getCommand())) {
throw new IllegalStateException(
"Tried to send command \"" + e.getCommand() + "\" to an unregistered device!");
}
int id = e.getId();
Device d = new Device(id, e.getName(), e.getVendorId(), e.getProductId(),
e.getDescriptor(), e.getReport());
mDevices.append(id, d);
}
private static void error(String msg) {
error(msg, null);
}
private static void error(String msg, Exception e) {
System.out.println(msg);
Log.e(TAG, msg);
if (e != null) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
}
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