touch_keyboard/main.cc

// Copyright 2016 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <base/logging.h>
#include <sys/wait.h>
#include "touch_keyboard/fakekeyboard.h"
#include "touch_keyboard/faketouchpad.h"

// This filepath is used as the input evdev device. Whichever touch sensor is
// to be used for touch keyboard input should have a udev rule put in place to
// set up this symlink.
constexpr char kTouchSensorDevicePath[] = "/dev/touch_keyboard";

using touch_keyboard::FakeTouchpad;
using touch_keyboard::FakeKeyboard;

int main() {
  LOG(INFO) << "Starting touch_keyboard_handler";

  // Fork into two processes, one to handle the keyboard functionality
  // and one to handle the touchpad region.
  int pid = fork();
  if (pid < 0) {
    LOG(FATAL) << "ERROR: Unable to fork! (" << pid << ")";
  } else if (pid == 0) {
    // TODO(charliemooney): Get these coordinates from somewhere not hard-coded
    LOG(INFO) << "Creating Fake Touchpad.";
    FakeTouchpad tp(755, 1765, 35, 585, touch_keyboard::kInvertY);
    tp.Start(kTouchSensorDevicePath, "virtual-touchpad");
  } else {
    FakeKeyboard kbd;
    kbd.Start(kTouchSensorDevicePath, "virtual-keyboard");
    wait(NULL);
  }

  return 0;
}