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Search for device automatically if none given

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This commit is contained in:
Grant Moyer
2021-02-07 21:05:34 -05:00
parent 6fdbc27998
commit 08e886ebc6
3 changed files with 52 additions and 25 deletions
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69
src/modules/keyboard_state.cpp
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@ -1,5 +1,6 @@
#include "modules/keyboard_state.hpp"
#include <filesystem>
#include <spdlog/spdlog.h>
extern "C" {
#include <sys/types.h>
@ -28,8 +29,9 @@ waybar::modules::KeyboardState::KeyboardState(const std::string& id, const Bar&
: "locked"),
icon_unlocked_(config_["format-icons"]["unlocked"].isString()
? config_["format-icons"]["unlocked"].asString()
: "unlocked")
{
: "unlocked"),
fd_(0),
dev_(nullptr) {
box_.set_name("keyboard_state");
if (config_["numlock"].asBool()) {
box_.pack_end(numlock_label_, false, false, 0);
@ -46,26 +48,28 @@ waybar::modules::KeyboardState::KeyboardState(const std::string& id, const Bar&
event_box_.add(box_);
if (config_["device-path"].isString()) {
dev_path_ = config_["device-path"].asString();
std::string dev_path = config_["device-path"].asString();
std::tie(fd_, dev_) = openDevice(dev_path);
} 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)
|| !libevdev_has_event_code(dev_, EV_LED, LED_SCROLLL)) {
throw std::runtime_error("Device doesn't support num lock, caps lock, or scroll lock events");
DIR* dev_dir = opendir("/dev/input");
if (dev_dir == nullptr) {
throw std::runtime_error("Failed to open /dev/input");
}
dirent *ep;
while ((ep = readdir(dev_dir))) {
if (ep->d_type != DT_CHR) continue;
std::string dev_path = std::string("/dev/input/") + ep->d_name;
try {
std::tie(fd_, dev_) = openDevice(dev_path);
spdlog::info("Found device {} at '{}'", libevdev_get_name(dev_), dev_path);
break;
} catch (const std::runtime_error& e) {
continue;
}
}
if (dev_ == nullptr) {
throw std::runtime_error("Failed to find keyboard device");
}
}
thread_ = [this] {
@ -82,6 +86,29 @@ waybar::modules::KeyboardState::~KeyboardState() {
}
}
auto waybar::modules::KeyboardState::openDevice(const std::string& path) -> std::pair<int, libevdev*> {
int fd = open(path.c_str(), O_NONBLOCK | O_CLOEXEC | O_RDONLY);
if (fd < 0) {
throw std::runtime_error("Can't open " + path);
}
libevdev* dev;
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)
|| !libevdev_has_event_code(dev, EV_LED, LED_SCROLLL)) {
throw std::runtime_error("Device doesn't support num lock, caps lock, or scroll lock events");
}
return std::make_pair(fd, dev);
}
auto waybar::modules::KeyboardState::update() -> void {
int err = LIBEVDEV_READ_STATUS_SUCCESS;
while (err == LIBEVDEV_READ_STATUS_SUCCESS) {