Waybar/src/modules/keyboard_state.cpp

74 lines
2.0 KiB
C++
Raw Normal View History

2021-02-07 20:05:11 +00:00
#include "modules/keyboard_state.hpp"
#include <filesystem>
extern "C" {
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
}
waybar::modules::KeyboardState::KeyboardState(const std::string& id, const Json::Value& config)
: ALabel(config, "keyboard_state", id, "{temperatureC}", 1) {
if (config_["device-path"].isString()) {
dev_path_ = config_["device-path"].asString();
} else {
dev_path_ = "";
}
fd_ = open(dev_path_.c_str(), O_NONBLOCK | O_CLOEXEC | O_RDONLY);
if (fd_ < 0) {
throw std::runtime_error("Can't open " + dev_path_);
}
int err = libevdev_new_from_fd(fd_, &dev_);
if (err < 0) {
throw std::runtime_error("Can't create libevdev device");
}
if (!libevdev_has_event_type(dev_, EV_LED)) {
throw std::runtime_error("Device doesn't support LED events");
}
if (!libevdev_has_event_code(dev_, EV_LED, LED_NUML) || !libevdev_has_event_code(dev_, EV_LED, LED_CAPSL)) {
throw std::runtime_error("Device doesn't support num lock or caps lock events");
}
thread_ = [this] {
dp.emit();
thread_.sleep_for(interval_);
};
}
waybar::modules::KeyboardState::~KeyboardState() {
libevdev_free(dev_);
int err = close(fd_);
if (err < 0) {
// Not much we can do, so ignore it.
}
}
auto waybar::modules::KeyboardState::update() -> void {
int err = LIBEVDEV_READ_STATUS_SUCCESS;
while (err == LIBEVDEV_READ_STATUS_SUCCESS) {
input_event ev;
err = libevdev_next_event(dev_, LIBEVDEV_READ_FLAG_NORMAL, &ev);
while (err == LIBEVDEV_READ_STATUS_SYNC) {
err = libevdev_next_event(dev_, LIBEVDEV_READ_FLAG_SYNC, &ev);
}
}
if (err != -EAGAIN) {
throw std::runtime_error("Failed to sync evdev device");
}
int numl = libevdev_get_event_value(dev_, EV_LED, LED_NUML);
//int capsl = libevdev_get_event_value(dev_, EV_LED, LED_CAPSL);
std::string text;
if (numl) {
text = fmt::format(format_, "num lock enabled");
label_.set_markup(text);
} else {
text = fmt::format(format_, "num lock disabled");
label_.set_markup(text);
}
ALabel::update();
}