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feat(backlight): use dbus to set the brightness

This commit is contained in:
Kuruyia 2023-02-03 12:58:52 +01:00
parent a78f0124d2
commit e8c4b85328
2 changed files with 15 additions and 9 deletions
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3
include/modules/backlight.hpp
View File

@ -6,6 +6,7 @@
#include <vector>
#include "ALabel.hpp"
#include "giomm/dbusproxy.h"
#include "util/json.hpp"
#include "util/sleeper_thread.hpp"
@ -62,5 +63,7 @@ class Backlight : public ALabel {
std::vector<BacklightDev> devices_;
// thread must destruct before shared data
util::SleeperThread udev_thread_;
Glib::RefPtr<Gio::DBus::Proxy> login_proxy_;
};
} // namespace waybar::modules

21
src/modules/backlight.cpp
View File

@ -110,6 +110,11 @@ waybar::modules::Backlight::Backlight(const std::string &id, const Json::Value &
event_box_.add_events(Gdk::SCROLL_MASK | Gdk::SMOOTH_SCROLL_MASK);
event_box_.signal_scroll_event().connect(sigc::mem_fun(*this, &Backlight::handleScroll));
// Connect to the login interface
login_proxy_ = Gio::DBus::Proxy::create_for_bus_sync(
Gio::DBus::BusType::BUS_TYPE_SYSTEM, "org.freedesktop.login1",
"/org/freedesktop/login1/session/self", "org.freedesktop.login1.Session");
udev_thread_ = [this] {
std::unique_ptr<udev, UdevDeleter> udev{udev_new()};
check_nn(udev.get(), "Udev new failed");
@ -275,6 +280,11 @@ bool waybar::modules::Backlight::handleScroll(GdkEventScroll *e) {
return AModule::handleScroll(e);
}
// Fail fast if the proxy could not be initialized
if (!login_proxy_) {
return true;
}
// Check scroll direction
auto dir = AModule::getScrollDir(e);
if (dir == SCROLL_DIR::NONE) {
@ -323,16 +333,9 @@ bool waybar::modules::Backlight::handleScroll(GdkEventScroll *e) {
// Clamp the value
new_value = std::clamp(new_value, 0, best->get_max());
// Get a udev instance
std::unique_ptr<udev, UdevDeleter> udev{udev_new()};
check_nn(udev.get(), "Udev new failed");
// Get the udev device
std::unique_ptr<udev_device, UdevDeviceDeleter> dev{udev_device_new_from_subsystem_sysname(udev.get(), "backlight", std::string(best->name()).c_str())};
check_nn(dev.get(), "Udev device new failed");
// Set the new value
udev_device_set_sysattr_value(dev.get(), "brightness", std::to_string(new_value).c_str());
auto call_args = Glib::VariantContainerBase(g_variant_new("(ssu)", "backlight", std::string(best->name()).c_str(), new_value));
login_proxy_->call_sync("SetBrightness", call_args);
return true;
}