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// Copyright (c) 2013 The Chromium 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 "ui/base/ozone/event_factory_ozone.h"
#include <fcntl.h>
#include <linux/input.h>
#include <poll.h>
#include <unistd.h>
#include "base/message_pump_ozone.h"
#include "base/strings/stringprintf.h"
#include "ui/base/ozone/key_event_converter_ozone.h"
#include "ui/base/ozone/touch_event_converter_ozone.h"
namespace ui {
EventFactoryOzone::EventFactoryOzone() {}
EventFactoryOzone::~EventFactoryOzone() {
for (unsigned i = 0; i < fd_controllers_.size(); i++) {
fd_controllers_[i]->StopWatchingFileDescriptor();
}
}
void EventFactoryOzone::CreateEvdevWatchers() {
// The number of devices in the directory is unknown without reading
// the contents of the directory. Further, with hot-plugging, the entries
// might decrease during the execution of this loop. So exciting from the
// loop on the first failure of open below is both cheaper and more
// reliable.
for (int id = 0; true; id++) {
std::string path = base::StringPrintf("/dev/input/event%d", id);
int fd = open(path.c_str(), O_RDONLY | O_NONBLOCK);
if (fd < 0)
break;
size_t evtype = 0;
COMPILE_ASSERT(sizeof(evtype) * 8 >= EV_MAX, evtype_wide_enough);
if (ioctl(fd, EVIOCGBIT(0, sizeof(evtype)), &evtype) == -1) {
DLOG(ERROR) << "failed ioctl EVIOCGBIT 0" << path;
close(fd);
continue;
}
EventConverterOzone* watcher = NULL;
// TODO(rjkroege) Add more device types. Support hot-plugging.
if (evtype & (1 << EV_ABS))
watcher = new TouchEventConverterOzone(fd, id);
else if (evtype & (1 << EV_KEY))
watcher = new KeyEventConverterOzone();
if (watcher) {
base::MessagePumpLibevent::FileDescriptorWatcher* controller =
new base::MessagePumpLibevent::FileDescriptorWatcher();
base::MessagePumpOzone::Current()->WatchFileDescriptor(
fd, true, base::MessagePumpLibevent::WATCH_READ, controller, watcher);
evdev_watchers_.push_back(watcher);
fd_controllers_.push_back(controller);
} else {
close(fd);
}
}
}
} // namespace ui
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